Bug Summary

File:tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
Warning:line 3738, column 10
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name RewriteModernObjC.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/tools/clang/lib/Frontend/Rewrite -I /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite -I /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/include -I /build/llvm-toolchain-snapshot-10~svn373517/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-10~svn373517/build-llvm/tools/clang/lib/Frontend/Rewrite -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~svn373517=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2019-10-02-234743-9763-1 -x c++ /build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp

/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp

1//===-- RewriteModernObjC.cpp - Playground for the code rewriter ----------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// Hacks and fun related to the code rewriter.
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/Rewrite/Frontend/ASTConsumers.h"
14#include "clang/AST/AST.h"
15#include "clang/AST/ASTConsumer.h"
16#include "clang/AST/Attr.h"
17#include "clang/AST/ParentMap.h"
18#include "clang/Basic/CharInfo.h"
19#include "clang/Basic/Diagnostic.h"
20#include "clang/Basic/IdentifierTable.h"
21#include "clang/Basic/SourceManager.h"
22#include "clang/Basic/TargetInfo.h"
23#include "clang/Config/config.h"
24#include "clang/Lex/Lexer.h"
25#include "clang/Rewrite/Core/Rewriter.h"
26#include "llvm/ADT/DenseSet.h"
27#include "llvm/ADT/SmallPtrSet.h"
28#include "llvm/ADT/StringExtras.h"
29#include "llvm/Support/MemoryBuffer.h"
30#include "llvm/Support/raw_ostream.h"
31#include <memory>
32
33#if CLANG_ENABLE_OBJC_REWRITER1
34
35using namespace clang;
36using llvm::utostr;
37
38namespace {
39 class RewriteModernObjC : public ASTConsumer {
40 protected:
41
42 enum {
43 BLOCK_FIELD_IS_OBJECT = 3, /* id, NSObject, __attribute__((NSObject)),
44 block, ... */
45 BLOCK_FIELD_IS_BLOCK = 7, /* a block variable */
46 BLOCK_FIELD_IS_BYREF = 8, /* the on stack structure holding the
47 __block variable */
48 BLOCK_FIELD_IS_WEAK = 16, /* declared __weak, only used in byref copy
49 helpers */
50 BLOCK_BYREF_CALLER = 128, /* called from __block (byref) copy/dispose
51 support routines */
52 BLOCK_BYREF_CURRENT_MAX = 256
53 };
54
55 enum {
56 BLOCK_NEEDS_FREE = (1 << 24),
57 BLOCK_HAS_COPY_DISPOSE = (1 << 25),
58 BLOCK_HAS_CXX_OBJ = (1 << 26),
59 BLOCK_IS_GC = (1 << 27),
60 BLOCK_IS_GLOBAL = (1 << 28),
61 BLOCK_HAS_DESCRIPTOR = (1 << 29)
62 };
63
64 Rewriter Rewrite;
65 DiagnosticsEngine &Diags;
66 const LangOptions &LangOpts;
67 ASTContext *Context;
68 SourceManager *SM;
69 TranslationUnitDecl *TUDecl;
70 FileID MainFileID;
71 const char *MainFileStart, *MainFileEnd;
72 Stmt *CurrentBody;
73 ParentMap *PropParentMap; // created lazily.
74 std::string InFileName;
75 std::unique_ptr<raw_ostream> OutFile;
76 std::string Preamble;
77
78 TypeDecl *ProtocolTypeDecl;
79 VarDecl *GlobalVarDecl;
80 Expr *GlobalConstructionExp;
81 unsigned RewriteFailedDiag;
82 unsigned GlobalBlockRewriteFailedDiag;
83 // ObjC string constant support.
84 unsigned NumObjCStringLiterals;
85 VarDecl *ConstantStringClassReference;
86 RecordDecl *NSStringRecord;
87
88 // ObjC foreach break/continue generation support.
89 int BcLabelCount;
90
91 unsigned TryFinallyContainsReturnDiag;
92 // Needed for super.
93 ObjCMethodDecl *CurMethodDef;
94 RecordDecl *SuperStructDecl;
95 RecordDecl *ConstantStringDecl;
96
97 FunctionDecl *MsgSendFunctionDecl;
98 FunctionDecl *MsgSendSuperFunctionDecl;
99 FunctionDecl *MsgSendStretFunctionDecl;
100 FunctionDecl *MsgSendSuperStretFunctionDecl;
101 FunctionDecl *MsgSendFpretFunctionDecl;
102 FunctionDecl *GetClassFunctionDecl;
103 FunctionDecl *GetMetaClassFunctionDecl;
104 FunctionDecl *GetSuperClassFunctionDecl;
105 FunctionDecl *SelGetUidFunctionDecl;
106 FunctionDecl *CFStringFunctionDecl;
107 FunctionDecl *SuperConstructorFunctionDecl;
108 FunctionDecl *CurFunctionDef;
109
110 /* Misc. containers needed for meta-data rewrite. */
111 SmallVector<ObjCImplementationDecl *, 8> ClassImplementation;
112 SmallVector<ObjCCategoryImplDecl *, 8> CategoryImplementation;
113 llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCSynthesizedStructs;
114 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> ObjCSynthesizedProtocols;
115 llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCWrittenInterfaces;
116 llvm::SmallPtrSet<TagDecl*, 32> GlobalDefinedTags;
117 SmallVector<ObjCInterfaceDecl*, 32> ObjCInterfacesSeen;
118 /// DefinedNonLazyClasses - List of defined "non-lazy" classes.
119 SmallVector<ObjCInterfaceDecl*, 8> DefinedNonLazyClasses;
120
121 /// DefinedNonLazyCategories - List of defined "non-lazy" categories.
122 SmallVector<ObjCCategoryDecl *, 8> DefinedNonLazyCategories;
123
124 SmallVector<Stmt *, 32> Stmts;
125 SmallVector<int, 8> ObjCBcLabelNo;
126 // Remember all the @protocol(<expr>) expressions.
127 llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ProtocolExprDecls;
128
129 llvm::DenseSet<uint64_t> CopyDestroyCache;
130
131 // Block expressions.
132 SmallVector<BlockExpr *, 32> Blocks;
133 SmallVector<int, 32> InnerDeclRefsCount;
134 SmallVector<DeclRefExpr *, 32> InnerDeclRefs;
135
136 SmallVector<DeclRefExpr *, 32> BlockDeclRefs;
137
138 // Block related declarations.
139 SmallVector<ValueDecl *, 8> BlockByCopyDecls;
140 llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDeclsPtrSet;
141 SmallVector<ValueDecl *, 8> BlockByRefDecls;
142 llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDeclsPtrSet;
143 llvm::DenseMap<ValueDecl *, unsigned> BlockByRefDeclNo;
144 llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
145 llvm::SmallPtrSet<VarDecl *, 8> ImportedLocalExternalDecls;
146
147 llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
148 llvm::DenseMap<ObjCInterfaceDecl *,
149 llvm::SmallSetVector<ObjCIvarDecl *, 8> > ReferencedIvars;
150
151 // ivar bitfield grouping containers
152 llvm::DenseSet<const ObjCInterfaceDecl *> ObjCInterefaceHasBitfieldGroups;
153 llvm::DenseMap<const ObjCIvarDecl* , unsigned> IvarGroupNumber;
154 // This container maps an <class, group number for ivar> tuple to the type
155 // of the struct where the bitfield belongs.
156 llvm::DenseMap<std::pair<const ObjCInterfaceDecl*, unsigned>, QualType> GroupRecordType;
157 SmallVector<FunctionDecl*, 32> FunctionDefinitionsSeen;
158
159 // This maps an original source AST to it's rewritten form. This allows
160 // us to avoid rewriting the same node twice (which is very uncommon).
161 // This is needed to support some of the exotic property rewriting.
162 llvm::DenseMap<Stmt *, Stmt *> ReplacedNodes;
163
164 // Needed for header files being rewritten
165 bool IsHeader;
166 bool SilenceRewriteMacroWarning;
167 bool GenerateLineInfo;
168 bool objc_impl_method;
169
170 bool DisableReplaceStmt;
171 class DisableReplaceStmtScope {
172 RewriteModernObjC &R;
173 bool SavedValue;
174
175 public:
176 DisableReplaceStmtScope(RewriteModernObjC &R)
177 : R(R), SavedValue(R.DisableReplaceStmt) {
178 R.DisableReplaceStmt = true;
179 }
180 ~DisableReplaceStmtScope() {
181 R.DisableReplaceStmt = SavedValue;
182 }
183 };
184 void InitializeCommon(ASTContext &context);
185
186 public:
187 llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames;
188
189 // Top Level Driver code.
190 bool HandleTopLevelDecl(DeclGroupRef D) override {
191 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
192 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(*I)) {
193 if (!Class->isThisDeclarationADefinition()) {
194 RewriteForwardClassDecl(D);
195 break;
196 } else {
197 // Keep track of all interface declarations seen.
198 ObjCInterfacesSeen.push_back(Class);
199 break;
200 }
201 }
202
203 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(*I)) {
204 if (!Proto->isThisDeclarationADefinition()) {
205 RewriteForwardProtocolDecl(D);
206 break;
207 }
208 }
209
210 if (FunctionDecl *FDecl = dyn_cast<FunctionDecl>(*I)) {
211 // Under modern abi, we cannot translate body of the function
212 // yet until all class extensions and its implementation is seen.
213 // This is because they may introduce new bitfields which must go
214 // into their grouping struct.
215 if (FDecl->isThisDeclarationADefinition() &&
216 // Not c functions defined inside an objc container.
217 !FDecl->isTopLevelDeclInObjCContainer()) {
218 FunctionDefinitionsSeen.push_back(FDecl);
219 break;
220 }
221 }
222 HandleTopLevelSingleDecl(*I);
223 }
224 return true;
225 }
226
227 void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) override {
228 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
229 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(*I)) {
230 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
231 RewriteBlockPointerDecl(TD);
232 else if (TD->getUnderlyingType()->isFunctionPointerType())
233 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
234 else
235 RewriteObjCQualifiedInterfaceTypes(TD);
236 }
237 }
238 }
239
240 void HandleTopLevelSingleDecl(Decl *D);
241 void HandleDeclInMainFile(Decl *D);
242 RewriteModernObjC(std::string inFile, std::unique_ptr<raw_ostream> OS,
243 DiagnosticsEngine &D, const LangOptions &LOpts,
244 bool silenceMacroWarn, bool LineInfo);
245
246 ~RewriteModernObjC() override {}
247
248 void HandleTranslationUnit(ASTContext &C) override;
249
250 void ReplaceStmt(Stmt *Old, Stmt *New) {
251 ReplaceStmtWithRange(Old, New, Old->getSourceRange());
252 }
253
254 void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
255 assert(Old != nullptr && New != nullptr && "Expected non-null Stmt's")((Old != nullptr && New != nullptr && "Expected non-null Stmt's"
) ? static_cast<void> (0) : __assert_fail ("Old != nullptr && New != nullptr && \"Expected non-null Stmt's\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 255, __PRETTY_FUNCTION__))
;
256
257 Stmt *ReplacingStmt = ReplacedNodes[Old];
258 if (ReplacingStmt)
259 return; // We can't rewrite the same node twice.
260
261 if (DisableReplaceStmt)
262 return;
263
264 // Measure the old text.
265 int Size = Rewrite.getRangeSize(SrcRange);
266 if (Size == -1) {
267 Diags.Report(Context->getFullLoc(Old->getBeginLoc()), RewriteFailedDiag)
268 << Old->getSourceRange();
269 return;
270 }
271 // Get the new text.
272 std::string SStr;
273 llvm::raw_string_ostream S(SStr);
274 New->printPretty(S, nullptr, PrintingPolicy(LangOpts));
275 const std::string &Str = S.str();
276
277 // If replacement succeeded or warning disabled return with no warning.
278 if (!Rewrite.ReplaceText(SrcRange.getBegin(), Size, Str)) {
279 ReplacedNodes[Old] = New;
280 return;
281 }
282 if (SilenceRewriteMacroWarning)
283 return;
284 Diags.Report(Context->getFullLoc(Old->getBeginLoc()), RewriteFailedDiag)
285 << Old->getSourceRange();
286 }
287
288 void InsertText(SourceLocation Loc, StringRef Str,
289 bool InsertAfter = true) {
290 // If insertion succeeded or warning disabled return with no warning.
291 if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
292 SilenceRewriteMacroWarning)
293 return;
294
295 Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag);
296 }
297
298 void ReplaceText(SourceLocation Start, unsigned OrigLength,
299 StringRef Str) {
300 // If removal succeeded or warning disabled return with no warning.
301 if (!Rewrite.ReplaceText(Start, OrigLength, Str) ||
302 SilenceRewriteMacroWarning)
303 return;
304
305 Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag);
306 }
307
308 // Syntactic Rewriting.
309 void RewriteRecordBody(RecordDecl *RD);
310 void RewriteInclude();
311 void RewriteLineDirective(const Decl *D);
312 void ConvertSourceLocationToLineDirective(SourceLocation Loc,
313 std::string &LineString);
314 void RewriteForwardClassDecl(DeclGroupRef D);
315 void RewriteForwardClassDecl(const SmallVectorImpl<Decl *> &DG);
316 void RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
317 const std::string &typedefString);
318 void RewriteImplementations();
319 void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
320 ObjCImplementationDecl *IMD,
321 ObjCCategoryImplDecl *CID);
322 void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
323 void RewriteImplementationDecl(Decl *Dcl);
324 void RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
325 ObjCMethodDecl *MDecl, std::string &ResultStr);
326 void RewriteTypeIntoString(QualType T, std::string &ResultStr,
327 const FunctionType *&FPRetType);
328 void RewriteByRefString(std::string &ResultStr, const std::string &Name,
329 ValueDecl *VD, bool def=false);
330 void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
331 void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
332 void RewriteForwardProtocolDecl(DeclGroupRef D);
333 void RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG);
334 void RewriteMethodDeclaration(ObjCMethodDecl *Method);
335 void RewriteProperty(ObjCPropertyDecl *prop);
336 void RewriteFunctionDecl(FunctionDecl *FD);
337 void RewriteBlockPointerType(std::string& Str, QualType Type);
338 void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
339 void RewriteBlockLiteralFunctionDecl(FunctionDecl *FD);
340 void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
341 void RewriteTypeOfDecl(VarDecl *VD);
342 void RewriteObjCQualifiedInterfaceTypes(Expr *E);
343
344 std::string getIvarAccessString(ObjCIvarDecl *D);
345
346 // Expression Rewriting.
347 Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
348 Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
349 Stmt *RewritePropertyOrImplicitGetter(PseudoObjectExpr *Pseudo);
350 Stmt *RewritePropertyOrImplicitSetter(PseudoObjectExpr *Pseudo);
351 Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
352 Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
353 Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
354 Stmt *RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp);
355 Stmt *RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp);
356 Stmt *RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp);
357 Stmt *RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp);
358 Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
359 Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
360 Stmt *RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S);
361 Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
362 Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
363 Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
364 SourceLocation OrigEnd);
365 Stmt *RewriteBreakStmt(BreakStmt *S);
366 Stmt *RewriteContinueStmt(ContinueStmt *S);
367 void RewriteCastExpr(CStyleCastExpr *CE);
368 void RewriteImplicitCastObjCExpr(CastExpr *IE);
369
370 // Computes ivar bitfield group no.
371 unsigned ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV);
372 // Names field decl. for ivar bitfield group.
373 void ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV, std::string &Result);
374 // Names struct type for ivar bitfield group.
375 void ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV, std::string &Result);
376 // Names symbol for ivar bitfield group field offset.
377 void ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV, std::string &Result);
378 // Given an ivar bitfield, it builds (or finds) its group record type.
379 QualType GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV);
380 QualType SynthesizeBitfieldGroupStructType(
381 ObjCIvarDecl *IV,
382 SmallVectorImpl<ObjCIvarDecl *> &IVars);
383
384 // Block rewriting.
385 void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
386
387 // Block specific rewrite rules.
388 void RewriteBlockPointerDecl(NamedDecl *VD);
389 void RewriteByRefVar(VarDecl *VD, bool firstDecl, bool lastDecl);
390 Stmt *RewriteBlockDeclRefExpr(DeclRefExpr *VD);
391 Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
392 void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
393
394 void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
395 std::string &Result);
396
397 void RewriteObjCFieldDecl(FieldDecl *fieldDecl, std::string &Result);
398 bool IsTagDefinedInsideClass(ObjCContainerDecl *IDecl, TagDecl *Tag,
399 bool &IsNamedDefinition);
400 void RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
401 std::string &Result);
402
403 bool RewriteObjCFieldDeclType(QualType &Type, std::string &Result);
404
405 void RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
406 std::string &Result);
407
408 void Initialize(ASTContext &context) override;
409
410 // Misc. AST transformation routines. Sometimes they end up calling
411 // rewriting routines on the new ASTs.
412 CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
413 ArrayRef<Expr *> Args,
414 SourceLocation StartLoc=SourceLocation(),
415 SourceLocation EndLoc=SourceLocation());
416
417 Expr *SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
418 QualType returnType,
419 SmallVectorImpl<QualType> &ArgTypes,
420 SmallVectorImpl<Expr*> &MsgExprs,
421 ObjCMethodDecl *Method);
422
423 Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
424 SourceLocation StartLoc=SourceLocation(),
425 SourceLocation EndLoc=SourceLocation());
426
427 void SynthCountByEnumWithState(std::string &buf);
428 void SynthMsgSendFunctionDecl();
429 void SynthMsgSendSuperFunctionDecl();
430 void SynthMsgSendStretFunctionDecl();
431 void SynthMsgSendFpretFunctionDecl();
432 void SynthMsgSendSuperStretFunctionDecl();
433 void SynthGetClassFunctionDecl();
434 void SynthGetMetaClassFunctionDecl();
435 void SynthGetSuperClassFunctionDecl();
436 void SynthSelGetUidFunctionDecl();
437 void SynthSuperConstructorFunctionDecl();
438
439 // Rewriting metadata
440 template<typename MethodIterator>
441 void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
442 MethodIterator MethodEnd,
443 bool IsInstanceMethod,
444 StringRef prefix,
445 StringRef ClassName,
446 std::string &Result);
447 void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
448 std::string &Result);
449 void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
450 std::string &Result);
451 void RewriteClassSetupInitHook(std::string &Result);
452
453 void RewriteMetaDataIntoBuffer(std::string &Result);
454 void WriteImageInfo(std::string &Result);
455 void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
456 std::string &Result);
457 void RewriteCategorySetupInitHook(std::string &Result);
458
459 // Rewriting ivar
460 void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
461 std::string &Result);
462 Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV);
463
464
465 std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
466 std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
467 StringRef funcName, std::string Tag);
468 std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
469 StringRef funcName, std::string Tag);
470 std::string SynthesizeBlockImpl(BlockExpr *CE,
471 std::string Tag, std::string Desc);
472 std::string SynthesizeBlockDescriptor(std::string DescTag,
473 std::string ImplTag,
474 int i, StringRef funcName,
475 unsigned hasCopy);
476 Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
477 void SynthesizeBlockLiterals(SourceLocation FunLocStart,
478 StringRef FunName);
479 FunctionDecl *SynthBlockInitFunctionDecl(StringRef name);
480 Stmt *SynthBlockInitExpr(BlockExpr *Exp,
481 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs);
482
483 // Misc. helper routines.
484 QualType getProtocolType();
485 void WarnAboutReturnGotoStmts(Stmt *S);
486 void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
487 void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
488 void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
489
490 bool IsDeclStmtInForeachHeader(DeclStmt *DS);
491 void CollectBlockDeclRefInfo(BlockExpr *Exp);
492 void GetBlockDeclRefExprs(Stmt *S);
493 void GetInnerBlockDeclRefExprs(Stmt *S,
494 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
495 llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts);
496
497 // We avoid calling Type::isBlockPointerType(), since it operates on the
498 // canonical type. We only care if the top-level type is a closure pointer.
499 bool isTopLevelBlockPointerType(QualType T) {
500 return isa<BlockPointerType>(T);
501 }
502
503 /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
504 /// to a function pointer type and upon success, returns true; false
505 /// otherwise.
506 bool convertBlockPointerToFunctionPointer(QualType &T) {
507 if (isTopLevelBlockPointerType(T)) {
508 const BlockPointerType *BPT = T->getAs<BlockPointerType>();
509 T = Context->getPointerType(BPT->getPointeeType());
510 return true;
511 }
512 return false;
513 }
514
515 bool convertObjCTypeToCStyleType(QualType &T);
516
517 bool needToScanForQualifiers(QualType T);
518 QualType getSuperStructType();
519 QualType getConstantStringStructType();
520 QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
521
522 void convertToUnqualifiedObjCType(QualType &T) {
523 if (T->isObjCQualifiedIdType()) {
524 bool isConst = T.isConstQualified();
525 T = isConst ? Context->getObjCIdType().withConst()
526 : Context->getObjCIdType();
527 }
528 else if (T->isObjCQualifiedClassType())
529 T = Context->getObjCClassType();
530 else if (T->isObjCObjectPointerType() &&
531 T->getPointeeType()->isObjCQualifiedInterfaceType()) {
532 if (const ObjCObjectPointerType * OBJPT =
533 T->getAsObjCInterfacePointerType()) {
534 const ObjCInterfaceType *IFaceT = OBJPT->getInterfaceType();
535 T = QualType(IFaceT, 0);
536 T = Context->getPointerType(T);
537 }
538 }
539 }
540
541 // FIXME: This predicate seems like it would be useful to add to ASTContext.
542 bool isObjCType(QualType T) {
543 if (!LangOpts.ObjC)
544 return false;
545
546 QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
547
548 if (OCT == Context->getCanonicalType(Context->getObjCIdType()) ||
549 OCT == Context->getCanonicalType(Context->getObjCClassType()))
550 return true;
551
552 if (const PointerType *PT = OCT->getAs<PointerType>()) {
553 if (isa<ObjCInterfaceType>(PT->getPointeeType()) ||
554 PT->getPointeeType()->isObjCQualifiedIdType())
555 return true;
556 }
557 return false;
558 }
559
560 bool PointerTypeTakesAnyBlockArguments(QualType QT);
561 bool PointerTypeTakesAnyObjCQualifiedType(QualType QT);
562 void GetExtentOfArgList(const char *Name, const char *&LParen,
563 const char *&RParen);
564
565 void QuoteDoublequotes(std::string &From, std::string &To) {
566 for (unsigned i = 0; i < From.length(); i++) {
567 if (From[i] == '"')
568 To += "\\\"";
569 else
570 To += From[i];
571 }
572 }
573
574 QualType getSimpleFunctionType(QualType result,
575 ArrayRef<QualType> args,
576 bool variadic = false) {
577 if (result == Context->getObjCInstanceType())
578 result = Context->getObjCIdType();
579 FunctionProtoType::ExtProtoInfo fpi;
580 fpi.Variadic = variadic;
581 return Context->getFunctionType(result, args, fpi);
582 }
583
584 // Helper function: create a CStyleCastExpr with trivial type source info.
585 CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
586 CastKind Kind, Expr *E) {
587 TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(Ty, SourceLocation());
588 return CStyleCastExpr::Create(*Ctx, Ty, VK_RValue, Kind, E, nullptr,
589 TInfo, SourceLocation(), SourceLocation());
590 }
591
592 bool ImplementationIsNonLazy(const ObjCImplDecl *OD) const {
593 IdentifierInfo* II = &Context->Idents.get("load");
594 Selector LoadSel = Context->Selectors.getSelector(0, &II);
595 return OD->getClassMethod(LoadSel) != nullptr;
596 }
597
598 StringLiteral *getStringLiteral(StringRef Str) {
599 QualType StrType = Context->getConstantArrayType(
600 Context->CharTy, llvm::APInt(32, Str.size() + 1), ArrayType::Normal,
601 0);
602 return StringLiteral::Create(*Context, Str, StringLiteral::Ascii,
603 /*Pascal=*/false, StrType, SourceLocation());
604 }
605 };
606} // end anonymous namespace
607
608void RewriteModernObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
609 NamedDecl *D) {
610 if (const FunctionProtoType *fproto
611 = dyn_cast<FunctionProtoType>(funcType.IgnoreParens())) {
612 for (const auto &I : fproto->param_types())
613 if (isTopLevelBlockPointerType(I)) {
614 // All the args are checked/rewritten. Don't call twice!
615 RewriteBlockPointerDecl(D);
616 break;
617 }
618 }
619}
620
621void RewriteModernObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
622 const PointerType *PT = funcType->getAs<PointerType>();
623 if (PT && PointerTypeTakesAnyBlockArguments(funcType))
624 RewriteBlocksInFunctionProtoType(PT->getPointeeType(), ND);
625}
626
627static bool IsHeaderFile(const std::string &Filename) {
628 std::string::size_type DotPos = Filename.rfind('.');
629
630 if (DotPos == std::string::npos) {
631 // no file extension
632 return false;
633 }
634
635 std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
636 // C header: .h
637 // C++ header: .hh or .H;
638 return Ext == "h" || Ext == "hh" || Ext == "H";
639}
640
641RewriteModernObjC::RewriteModernObjC(std::string inFile,
642 std::unique_ptr<raw_ostream> OS,
643 DiagnosticsEngine &D,
644 const LangOptions &LOpts,
645 bool silenceMacroWarn, bool LineInfo)
646 : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(std::move(OS)),
647 SilenceRewriteMacroWarning(silenceMacroWarn), GenerateLineInfo(LineInfo) {
648 IsHeader = IsHeaderFile(inFile);
649 RewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
650 "rewriting sub-expression within a macro (may not be correct)");
651 // FIXME. This should be an error. But if block is not called, it is OK. And it
652 // may break including some headers.
653 GlobalBlockRewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
654 "rewriting block literal declared in global scope is not implemented");
655
656 TryFinallyContainsReturnDiag = Diags.getCustomDiagID(
657 DiagnosticsEngine::Warning,
658 "rewriter doesn't support user-specified control flow semantics "
659 "for @try/@finally (code may not execute properly)");
660}
661
662std::unique_ptr<ASTConsumer> clang::CreateModernObjCRewriter(
663 const std::string &InFile, std::unique_ptr<raw_ostream> OS,
664 DiagnosticsEngine &Diags, const LangOptions &LOpts,
665 bool SilenceRewriteMacroWarning, bool LineInfo) {
666 return std::make_unique<RewriteModernObjC>(InFile, std::move(OS), Diags,
667 LOpts, SilenceRewriteMacroWarning,
668 LineInfo);
669}
670
671void RewriteModernObjC::InitializeCommon(ASTContext &context) {
672 Context = &context;
673 SM = &Context->getSourceManager();
674 TUDecl = Context->getTranslationUnitDecl();
675 MsgSendFunctionDecl = nullptr;
676 MsgSendSuperFunctionDecl = nullptr;
677 MsgSendStretFunctionDecl = nullptr;
678 MsgSendSuperStretFunctionDecl = nullptr;
679 MsgSendFpretFunctionDecl = nullptr;
680 GetClassFunctionDecl = nullptr;
681 GetMetaClassFunctionDecl = nullptr;
682 GetSuperClassFunctionDecl = nullptr;
683 SelGetUidFunctionDecl = nullptr;
684 CFStringFunctionDecl = nullptr;
685 ConstantStringClassReference = nullptr;
686 NSStringRecord = nullptr;
687 CurMethodDef = nullptr;
688 CurFunctionDef = nullptr;
689 GlobalVarDecl = nullptr;
690 GlobalConstructionExp = nullptr;
691 SuperStructDecl = nullptr;
692 ProtocolTypeDecl = nullptr;
693 ConstantStringDecl = nullptr;
694 BcLabelCount = 0;
695 SuperConstructorFunctionDecl = nullptr;
696 NumObjCStringLiterals = 0;
697 PropParentMap = nullptr;
698 CurrentBody = nullptr;
699 DisableReplaceStmt = false;
700 objc_impl_method = false;
701
702 // Get the ID and start/end of the main file.
703 MainFileID = SM->getMainFileID();
704 const llvm::MemoryBuffer *MainBuf = SM->getBuffer(MainFileID);
705 MainFileStart = MainBuf->getBufferStart();
706 MainFileEnd = MainBuf->getBufferEnd();
707
708 Rewrite.setSourceMgr(Context->getSourceManager(), Context->getLangOpts());
709}
710
711//===----------------------------------------------------------------------===//
712// Top Level Driver Code
713//===----------------------------------------------------------------------===//
714
715void RewriteModernObjC::HandleTopLevelSingleDecl(Decl *D) {
716 if (Diags.hasErrorOccurred())
717 return;
718
719 // Two cases: either the decl could be in the main file, or it could be in a
720 // #included file. If the former, rewrite it now. If the later, check to see
721 // if we rewrote the #include/#import.
722 SourceLocation Loc = D->getLocation();
723 Loc = SM->getExpansionLoc(Loc);
724
725 // If this is for a builtin, ignore it.
726 if (Loc.isInvalid()) return;
727
728 // Look for built-in declarations that we need to refer during the rewrite.
729 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
730 RewriteFunctionDecl(FD);
731 } else if (VarDecl *FVD = dyn_cast<VarDecl>(D)) {
732 // declared in <Foundation/NSString.h>
733 if (FVD->getName() == "_NSConstantStringClassReference") {
734 ConstantStringClassReference = FVD;
735 return;
736 }
737 } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) {
738 RewriteCategoryDecl(CD);
739 } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) {
740 if (PD->isThisDeclarationADefinition())
741 RewriteProtocolDecl(PD);
742 } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
743 // Recurse into linkage specifications
744 for (DeclContext::decl_iterator DI = LSD->decls_begin(),
745 DIEnd = LSD->decls_end();
746 DI != DIEnd; ) {
747 if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>((*DI))) {
748 if (!IFace->isThisDeclarationADefinition()) {
749 SmallVector<Decl *, 8> DG;
750 SourceLocation StartLoc = IFace->getBeginLoc();
751 do {
752 if (isa<ObjCInterfaceDecl>(*DI) &&
753 !cast<ObjCInterfaceDecl>(*DI)->isThisDeclarationADefinition() &&
754 StartLoc == (*DI)->getBeginLoc())
755 DG.push_back(*DI);
756 else
757 break;
758
759 ++DI;
760 } while (DI != DIEnd);
761 RewriteForwardClassDecl(DG);
762 continue;
763 }
764 else {
765 // Keep track of all interface declarations seen.
766 ObjCInterfacesSeen.push_back(IFace);
767 ++DI;
768 continue;
769 }
770 }
771
772 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>((*DI))) {
773 if (!Proto->isThisDeclarationADefinition()) {
774 SmallVector<Decl *, 8> DG;
775 SourceLocation StartLoc = Proto->getBeginLoc();
776 do {
777 if (isa<ObjCProtocolDecl>(*DI) &&
778 !cast<ObjCProtocolDecl>(*DI)->isThisDeclarationADefinition() &&
779 StartLoc == (*DI)->getBeginLoc())
780 DG.push_back(*DI);
781 else
782 break;
783
784 ++DI;
785 } while (DI != DIEnd);
786 RewriteForwardProtocolDecl(DG);
787 continue;
788 }
789 }
790
791 HandleTopLevelSingleDecl(*DI);
792 ++DI;
793 }
794 }
795 // If we have a decl in the main file, see if we should rewrite it.
796 if (SM->isWrittenInMainFile(Loc))
797 return HandleDeclInMainFile(D);
798}
799
800//===----------------------------------------------------------------------===//
801// Syntactic (non-AST) Rewriting Code
802//===----------------------------------------------------------------------===//
803
804void RewriteModernObjC::RewriteInclude() {
805 SourceLocation LocStart = SM->getLocForStartOfFile(MainFileID);
806 StringRef MainBuf = SM->getBufferData(MainFileID);
807 const char *MainBufStart = MainBuf.begin();
808 const char *MainBufEnd = MainBuf.end();
809 size_t ImportLen = strlen("import");
810
811 // Loop over the whole file, looking for includes.
812 for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; ++BufPtr) {
813 if (*BufPtr == '#') {
814 if (++BufPtr == MainBufEnd)
815 return;
816 while (*BufPtr == ' ' || *BufPtr == '\t')
817 if (++BufPtr == MainBufEnd)
818 return;
819 if (!strncmp(BufPtr, "import", ImportLen)) {
820 // replace import with include
821 SourceLocation ImportLoc =
822 LocStart.getLocWithOffset(BufPtr-MainBufStart);
823 ReplaceText(ImportLoc, ImportLen, "include");
824 BufPtr += ImportLen;
825 }
826 }
827 }
828}
829
830static void WriteInternalIvarName(const ObjCInterfaceDecl *IDecl,
831 ObjCIvarDecl *IvarDecl, std::string &Result) {
832 Result += "OBJC_IVAR_$_";
833 Result += IDecl->getName();
834 Result += "$";
835 Result += IvarDecl->getName();
836}
837
838std::string
839RewriteModernObjC::getIvarAccessString(ObjCIvarDecl *D) {
840 const ObjCInterfaceDecl *ClassDecl = D->getContainingInterface();
841
842 // Build name of symbol holding ivar offset.
843 std::string IvarOffsetName;
844 if (D->isBitField())
845 ObjCIvarBitfieldGroupOffset(D, IvarOffsetName);
846 else
847 WriteInternalIvarName(ClassDecl, D, IvarOffsetName);
848
849 std::string S = "(*(";
850 QualType IvarT = D->getType();
851 if (D->isBitField())
852 IvarT = GetGroupRecordTypeForObjCIvarBitfield(D);
853
854 if (!isa<TypedefType>(IvarT) && IvarT->isRecordType()) {
855 RecordDecl *RD = IvarT->getAs<RecordType>()->getDecl();
856 RD = RD->getDefinition();
857 if (RD && !RD->getDeclName().getAsIdentifierInfo()) {
858 // decltype(((Foo_IMPL*)0)->bar) *
859 ObjCContainerDecl *CDecl =
860 dyn_cast<ObjCContainerDecl>(D->getDeclContext());
861 // ivar in class extensions requires special treatment.
862 if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CDecl))
863 CDecl = CatDecl->getClassInterface();
864 std::string RecName = CDecl->getName();
865 RecName += "_IMPL";
866 RecordDecl *RD =
867 RecordDecl::Create(*Context, TTK_Struct, TUDecl, SourceLocation(),
868 SourceLocation(), &Context->Idents.get(RecName));
869 QualType PtrStructIMPL = Context->getPointerType(Context->getTagDeclType(RD));
870 unsigned UnsignedIntSize =
871 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
872 Expr *Zero = IntegerLiteral::Create(*Context,
873 llvm::APInt(UnsignedIntSize, 0),
874 Context->UnsignedIntTy, SourceLocation());
875 Zero = NoTypeInfoCStyleCastExpr(Context, PtrStructIMPL, CK_BitCast, Zero);
876 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
877 Zero);
878 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
879 SourceLocation(),
880 &Context->Idents.get(D->getNameAsString()),
881 IvarT, nullptr,
882 /*BitWidth=*/nullptr, /*Mutable=*/true,
883 ICIS_NoInit);
884 MemberExpr *ME = MemberExpr::CreateImplicit(
885 *Context, PE, true, FD, FD->getType(), VK_LValue, OK_Ordinary);
886 IvarT = Context->getDecltypeType(ME, ME->getType());
887 }
888 }
889 convertObjCTypeToCStyleType(IvarT);
890 QualType castT = Context->getPointerType(IvarT);
891 std::string TypeString(castT.getAsString(Context->getPrintingPolicy()));
892 S += TypeString;
893 S += ")";
894
895 // ((char *)self + IVAR_OFFSET_SYMBOL_NAME)
896 S += "((char *)self + ";
897 S += IvarOffsetName;
898 S += "))";
899 if (D->isBitField()) {
900 S += ".";
901 S += D->getNameAsString();
902 }
903 ReferencedIvars[const_cast<ObjCInterfaceDecl *>(ClassDecl)].insert(D);
904 return S;
905}
906
907/// mustSynthesizeSetterGetterMethod - returns true if setter or getter has not
908/// been found in the class implementation. In this case, it must be synthesized.
909static bool mustSynthesizeSetterGetterMethod(ObjCImplementationDecl *IMP,
910 ObjCPropertyDecl *PD,
911 bool getter) {
912 return getter ? !IMP->getInstanceMethod(PD->getGetterName())
913 : !IMP->getInstanceMethod(PD->getSetterName());
914
915}
916
917void RewriteModernObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
918 ObjCImplementationDecl *IMD,
919 ObjCCategoryImplDecl *CID) {
920 static bool objcGetPropertyDefined = false;
921 static bool objcSetPropertyDefined = false;
922 SourceLocation startGetterSetterLoc;
923
924 if (PID->getBeginLoc().isValid()) {
925 SourceLocation startLoc = PID->getBeginLoc();
926 InsertText(startLoc, "// ");
927 const char *startBuf = SM->getCharacterData(startLoc);
928 assert((*startBuf == '@') && "bogus @synthesize location")(((*startBuf == '@') && "bogus @synthesize location")
? static_cast<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @synthesize location\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 928, __PRETTY_FUNCTION__))
;
929 const char *semiBuf = strchr(startBuf, ';');
930 assert((*semiBuf == ';') && "@synthesize: can't find ';'")(((*semiBuf == ';') && "@synthesize: can't find ';'")
? static_cast<void> (0) : __assert_fail ("(*semiBuf == ';') && \"@synthesize: can't find ';'\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 930, __PRETTY_FUNCTION__))
;
931 startGetterSetterLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
932 } else
933 startGetterSetterLoc = IMD ? IMD->getEndLoc() : CID->getEndLoc();
934
935 if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
936 return; // FIXME: is this correct?
937
938 // Generate the 'getter' function.
939 ObjCPropertyDecl *PD = PID->getPropertyDecl();
940 ObjCIvarDecl *OID = PID->getPropertyIvarDecl();
941 assert(IMD && OID && "Synthesized ivars must be attached to @implementation")((IMD && OID && "Synthesized ivars must be attached to @implementation"
) ? static_cast<void> (0) : __assert_fail ("IMD && OID && \"Synthesized ivars must be attached to @implementation\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 941, __PRETTY_FUNCTION__))
;
942
943 unsigned Attributes = PD->getPropertyAttributes();
944 if (mustSynthesizeSetterGetterMethod(IMD, PD, true /*getter*/)) {
945 bool GenGetProperty = !(Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) &&
946 (Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
947 ObjCPropertyDecl::OBJC_PR_copy));
948 std::string Getr;
949 if (GenGetProperty && !objcGetPropertyDefined) {
950 objcGetPropertyDefined = true;
951 // FIXME. Is this attribute correct in all cases?
952 Getr = "\nextern \"C\" __declspec(dllimport) "
953 "id objc_getProperty(id, SEL, long, bool);\n";
954 }
955 RewriteObjCMethodDecl(OID->getContainingInterface(),
956 PD->getGetterMethodDecl(), Getr);
957 Getr += "{ ";
958 // Synthesize an explicit cast to gain access to the ivar.
959 // See objc-act.c:objc_synthesize_new_getter() for details.
960 if (GenGetProperty) {
961 // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
962 Getr += "typedef ";
963 const FunctionType *FPRetType = nullptr;
964 RewriteTypeIntoString(PD->getGetterMethodDecl()->getReturnType(), Getr,
965 FPRetType);
966 Getr += " _TYPE";
967 if (FPRetType) {
968 Getr += ")"; // close the precedence "scope" for "*".
969
970 // Now, emit the argument types (if any).
971 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)){
972 Getr += "(";
973 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
974 if (i) Getr += ", ";
975 std::string ParamStr =
976 FT->getParamType(i).getAsString(Context->getPrintingPolicy());
977 Getr += ParamStr;
978 }
979 if (FT->isVariadic()) {
980 if (FT->getNumParams())
981 Getr += ", ";
982 Getr += "...";
983 }
984 Getr += ")";
985 } else
986 Getr += "()";
987 }
988 Getr += ";\n";
989 Getr += "return (_TYPE)";
990 Getr += "objc_getProperty(self, _cmd, ";
991 RewriteIvarOffsetComputation(OID, Getr);
992 Getr += ", 1)";
993 }
994 else
995 Getr += "return " + getIvarAccessString(OID);
996 Getr += "; }";
997 InsertText(startGetterSetterLoc, Getr);
998 }
999
1000 if (PD->isReadOnly() ||
1001 !mustSynthesizeSetterGetterMethod(IMD, PD, false /*setter*/))
1002 return;
1003
1004 // Generate the 'setter' function.
1005 std::string Setr;
1006 bool GenSetProperty = Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
1007 ObjCPropertyDecl::OBJC_PR_copy);
1008 if (GenSetProperty && !objcSetPropertyDefined) {
1009 objcSetPropertyDefined = true;
1010 // FIXME. Is this attribute correct in all cases?
1011 Setr = "\nextern \"C\" __declspec(dllimport) "
1012 "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
1013 }
1014
1015 RewriteObjCMethodDecl(OID->getContainingInterface(),
1016 PD->getSetterMethodDecl(), Setr);
1017 Setr += "{ ";
1018 // Synthesize an explicit cast to initialize the ivar.
1019 // See objc-act.c:objc_synthesize_new_setter() for details.
1020 if (GenSetProperty) {
1021 Setr += "objc_setProperty (self, _cmd, ";
1022 RewriteIvarOffsetComputation(OID, Setr);
1023 Setr += ", (id)";
1024 Setr += PD->getName();
1025 Setr += ", ";
1026 if (Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic)
1027 Setr += "0, ";
1028 else
1029 Setr += "1, ";
1030 if (Attributes & ObjCPropertyDecl::OBJC_PR_copy)
1031 Setr += "1)";
1032 else
1033 Setr += "0)";
1034 }
1035 else {
1036 Setr += getIvarAccessString(OID) + " = ";
1037 Setr += PD->getName();
1038 }
1039 Setr += "; }\n";
1040 InsertText(startGetterSetterLoc, Setr);
1041}
1042
1043static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl,
1044 std::string &typedefString) {
1045 typedefString += "\n#ifndef _REWRITER_typedef_";
1046 typedefString += ForwardDecl->getNameAsString();
1047 typedefString += "\n";
1048 typedefString += "#define _REWRITER_typedef_";
1049 typedefString += ForwardDecl->getNameAsString();
1050 typedefString += "\n";
1051 typedefString += "typedef struct objc_object ";
1052 typedefString += ForwardDecl->getNameAsString();
1053 // typedef struct { } _objc_exc_Classname;
1054 typedefString += ";\ntypedef struct {} _objc_exc_";
1055 typedefString += ForwardDecl->getNameAsString();
1056 typedefString += ";\n#endif\n";
1057}
1058
1059void RewriteModernObjC::RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
1060 const std::string &typedefString) {
1061 SourceLocation startLoc = ClassDecl->getBeginLoc();
1062 const char *startBuf = SM->getCharacterData(startLoc);
1063 const char *semiPtr = strchr(startBuf, ';');
1064 // Replace the @class with typedefs corresponding to the classes.
1065 ReplaceText(startLoc, semiPtr-startBuf+1, typedefString);
1066}
1067
1068void RewriteModernObjC::RewriteForwardClassDecl(DeclGroupRef D) {
1069 std::string typedefString;
1070 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
1071 if (ObjCInterfaceDecl *ForwardDecl = dyn_cast<ObjCInterfaceDecl>(*I)) {
1072 if (I == D.begin()) {
1073 // Translate to typedef's that forward reference structs with the same name
1074 // as the class. As a convenience, we include the original declaration
1075 // as a comment.
1076 typedefString += "// @class ";
1077 typedefString += ForwardDecl->getNameAsString();
1078 typedefString += ";";
1079 }
1080 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1081 }
1082 else
1083 HandleTopLevelSingleDecl(*I);
1084 }
1085 DeclGroupRef::iterator I = D.begin();
1086 RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(*I), typedefString);
1087}
1088
1089void RewriteModernObjC::RewriteForwardClassDecl(
1090 const SmallVectorImpl<Decl *> &D) {
1091 std::string typedefString;
1092 for (unsigned i = 0; i < D.size(); i++) {
1093 ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(D[i]);
1094 if (i == 0) {
1095 typedefString += "// @class ";
1096 typedefString += ForwardDecl->getNameAsString();
1097 typedefString += ";";
1098 }
1099 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1100 }
1101 RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(D[0]), typedefString);
1102}
1103
1104void RewriteModernObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
1105 // When method is a synthesized one, such as a getter/setter there is
1106 // nothing to rewrite.
1107 if (Method->isImplicit())
1108 return;
1109 SourceLocation LocStart = Method->getBeginLoc();
1110 SourceLocation LocEnd = Method->getEndLoc();
1111
1112 if (SM->getExpansionLineNumber(LocEnd) >
1113 SM->getExpansionLineNumber(LocStart)) {
1114 InsertText(LocStart, "#if 0\n");
1115 ReplaceText(LocEnd, 1, ";\n#endif\n");
1116 } else {
1117 InsertText(LocStart, "// ");
1118 }
1119}
1120
1121void RewriteModernObjC::RewriteProperty(ObjCPropertyDecl *prop) {
1122 SourceLocation Loc = prop->getAtLoc();
1123
1124 ReplaceText(Loc, 0, "// ");
1125 // FIXME: handle properties that are declared across multiple lines.
1126}
1127
1128void RewriteModernObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
1129 SourceLocation LocStart = CatDecl->getBeginLoc();
1130
1131 // FIXME: handle category headers that are declared across multiple lines.
1132 if (CatDecl->getIvarRBraceLoc().isValid()) {
1133 ReplaceText(LocStart, 1, "/** ");
1134 ReplaceText(CatDecl->getIvarRBraceLoc(), 1, "**/ ");
1135 }
1136 else {
1137 ReplaceText(LocStart, 0, "// ");
1138 }
1139
1140 for (auto *I : CatDecl->instance_properties())
1141 RewriteProperty(I);
1142
1143 for (auto *I : CatDecl->instance_methods())
1144 RewriteMethodDeclaration(I);
1145 for (auto *I : CatDecl->class_methods())
1146 RewriteMethodDeclaration(I);
1147
1148 // Lastly, comment out the @end.
1149 ReplaceText(CatDecl->getAtEndRange().getBegin(),
1150 strlen("@end"), "/* @end */\n");
1151}
1152
1153void RewriteModernObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
1154 SourceLocation LocStart = PDecl->getBeginLoc();
1155 assert(PDecl->isThisDeclarationADefinition())((PDecl->isThisDeclarationADefinition()) ? static_cast<
void> (0) : __assert_fail ("PDecl->isThisDeclarationADefinition()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1155, __PRETTY_FUNCTION__))
;
1156
1157 // FIXME: handle protocol headers that are declared across multiple lines.
1158 ReplaceText(LocStart, 0, "// ");
1159
1160 for (auto *I : PDecl->instance_methods())
1161 RewriteMethodDeclaration(I);
1162 for (auto *I : PDecl->class_methods())
1163 RewriteMethodDeclaration(I);
1164 for (auto *I : PDecl->instance_properties())
1165 RewriteProperty(I);
1166
1167 // Lastly, comment out the @end.
1168 SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
1169 ReplaceText(LocEnd, strlen("@end"), "/* @end */\n");
1170
1171 // Must comment out @optional/@required
1172 const char *startBuf = SM->getCharacterData(LocStart);
1173 const char *endBuf = SM->getCharacterData(LocEnd);
1174 for (const char *p = startBuf; p < endBuf; p++) {
1175 if (*p == '@' && !strncmp(p+1, "optional", strlen("optional"))) {
1176 SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1177 ReplaceText(OptionalLoc, strlen("@optional"), "/* @optional */");
1178
1179 }
1180 else if (*p == '@' && !strncmp(p+1, "required", strlen("required"))) {
1181 SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1182 ReplaceText(OptionalLoc, strlen("@required"), "/* @required */");
1183
1184 }
1185 }
1186}
1187
1188void RewriteModernObjC::RewriteForwardProtocolDecl(DeclGroupRef D) {
1189 SourceLocation LocStart = (*D.begin())->getBeginLoc();
1190 if (LocStart.isInvalid())
1191 llvm_unreachable("Invalid SourceLocation")::llvm::llvm_unreachable_internal("Invalid SourceLocation", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1191)
;
1192 // FIXME: handle forward protocol that are declared across multiple lines.
1193 ReplaceText(LocStart, 0, "// ");
1194}
1195
1196void
1197RewriteModernObjC::RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG) {
1198 SourceLocation LocStart = DG[0]->getBeginLoc();
1199 if (LocStart.isInvalid())
1200 llvm_unreachable("Invalid SourceLocation")::llvm::llvm_unreachable_internal("Invalid SourceLocation", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1200)
;
1201 // FIXME: handle forward protocol that are declared across multiple lines.
1202 ReplaceText(LocStart, 0, "// ");
1203}
1204
1205void RewriteModernObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
1206 const FunctionType *&FPRetType) {
1207 if (T->isObjCQualifiedIdType())
1208 ResultStr += "id";
1209 else if (T->isFunctionPointerType() ||
1210 T->isBlockPointerType()) {
1211 // needs special handling, since pointer-to-functions have special
1212 // syntax (where a decaration models use).
1213 QualType retType = T;
1214 QualType PointeeTy;
1215 if (const PointerType* PT = retType->getAs<PointerType>())
1216 PointeeTy = PT->getPointeeType();
1217 else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
1218 PointeeTy = BPT->getPointeeType();
1219 if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
1220 ResultStr +=
1221 FPRetType->getReturnType().getAsString(Context->getPrintingPolicy());
1222 ResultStr += "(*";
1223 }
1224 } else
1225 ResultStr += T.getAsString(Context->getPrintingPolicy());
1226}
1227
1228void RewriteModernObjC::RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
1229 ObjCMethodDecl *OMD,
1230 std::string &ResultStr) {
1231 //fprintf(stderr,"In RewriteObjCMethodDecl\n");
1232 const FunctionType *FPRetType = nullptr;
1233 ResultStr += "\nstatic ";
1234 RewriteTypeIntoString(OMD->getReturnType(), ResultStr, FPRetType);
1235 ResultStr += " ";
1236
1237 // Unique method name
1238 std::string NameStr;
1239
1240 if (OMD->isInstanceMethod())
1241 NameStr += "_I_";
1242 else
1243 NameStr += "_C_";
1244
1245 NameStr += IDecl->getNameAsString();
1246 NameStr += "_";
1247
1248 if (ObjCCategoryImplDecl *CID =
1249 dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) {
1250 NameStr += CID->getNameAsString();
1251 NameStr += "_";
1252 }
1253 // Append selector names, replacing ':' with '_'
1254 {
1255 std::string selString = OMD->getSelector().getAsString();
1256 int len = selString.size();
1257 for (int i = 0; i < len; i++)
1258 if (selString[i] == ':')
1259 selString[i] = '_';
1260 NameStr += selString;
1261 }
1262 // Remember this name for metadata emission
1263 MethodInternalNames[OMD] = NameStr;
1264 ResultStr += NameStr;
1265
1266 // Rewrite arguments
1267 ResultStr += "(";
1268
1269 // invisible arguments
1270 if (OMD->isInstanceMethod()) {
1271 QualType selfTy = Context->getObjCInterfaceType(IDecl);
1272 selfTy = Context->getPointerType(selfTy);
1273 if (!LangOpts.MicrosoftExt) {
1274 if (ObjCSynthesizedStructs.count(const_cast<ObjCInterfaceDecl*>(IDecl)))
1275 ResultStr += "struct ";
1276 }
1277 // When rewriting for Microsoft, explicitly omit the structure name.
1278 ResultStr += IDecl->getNameAsString();
1279 ResultStr += " *";
1280 }
1281 else
1282 ResultStr += Context->getObjCClassType().getAsString(
1283 Context->getPrintingPolicy());
1284
1285 ResultStr += " self, ";
1286 ResultStr += Context->getObjCSelType().getAsString(Context->getPrintingPolicy());
1287 ResultStr += " _cmd";
1288
1289 // Method arguments.
1290 for (const auto *PDecl : OMD->parameters()) {
1291 ResultStr += ", ";
1292 if (PDecl->getType()->isObjCQualifiedIdType()) {
1293 ResultStr += "id ";
1294 ResultStr += PDecl->getNameAsString();
1295 } else {
1296 std::string Name = PDecl->getNameAsString();
1297 QualType QT = PDecl->getType();
1298 // Make sure we convert "t (^)(...)" to "t (*)(...)".
1299 (void)convertBlockPointerToFunctionPointer(QT);
1300 QT.getAsStringInternal(Name, Context->getPrintingPolicy());
1301 ResultStr += Name;
1302 }
1303 }
1304 if (OMD->isVariadic())
1305 ResultStr += ", ...";
1306 ResultStr += ") ";
1307
1308 if (FPRetType) {
1309 ResultStr += ")"; // close the precedence "scope" for "*".
1310
1311 // Now, emit the argument types (if any).
1312 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)) {
1313 ResultStr += "(";
1314 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
1315 if (i) ResultStr += ", ";
1316 std::string ParamStr =
1317 FT->getParamType(i).getAsString(Context->getPrintingPolicy());
1318 ResultStr += ParamStr;
1319 }
1320 if (FT->isVariadic()) {
1321 if (FT->getNumParams())
1322 ResultStr += ", ";
1323 ResultStr += "...";
1324 }
1325 ResultStr += ")";
1326 } else {
1327 ResultStr += "()";
1328 }
1329 }
1330}
1331
1332void RewriteModernObjC::RewriteImplementationDecl(Decl *OID) {
1333 ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(OID);
1334 ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(OID);
1335
1336 if (IMD) {
1337 if (IMD->getIvarRBraceLoc().isValid()) {
1338 ReplaceText(IMD->getBeginLoc(), 1, "/** ");
1339 ReplaceText(IMD->getIvarRBraceLoc(), 1, "**/ ");
1340 }
1341 else {
1342 InsertText(IMD->getBeginLoc(), "// ");
1343 }
1344 }
1345 else
1346 InsertText(CID->getBeginLoc(), "// ");
1347
1348 for (auto *OMD : IMD ? IMD->instance_methods() : CID->instance_methods()) {
1349 std::string ResultStr;
1350 RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1351 SourceLocation LocStart = OMD->getBeginLoc();
1352 SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1353
1354 const char *startBuf = SM->getCharacterData(LocStart);
1355 const char *endBuf = SM->getCharacterData(LocEnd);
1356 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1357 }
1358
1359 for (auto *OMD : IMD ? IMD->class_methods() : CID->class_methods()) {
1360 std::string ResultStr;
1361 RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1362 SourceLocation LocStart = OMD->getBeginLoc();
1363 SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1364
1365 const char *startBuf = SM->getCharacterData(LocStart);
1366 const char *endBuf = SM->getCharacterData(LocEnd);
1367 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1368 }
1369 for (auto *I : IMD ? IMD->property_impls() : CID->property_impls())
1370 RewritePropertyImplDecl(I, IMD, CID);
1371
1372 InsertText(IMD ? IMD->getEndLoc() : CID->getEndLoc(), "// ");
1373}
1374
1375void RewriteModernObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
1376 // Do not synthesize more than once.
1377 if (ObjCSynthesizedStructs.count(ClassDecl))
11
Assuming the condition is false
12
Taking false branch
15
Assuming the condition is false
16
Taking false branch
1378 return;
1379 // Make sure super class's are written before current class is written.
1380 ObjCInterfaceDecl *SuperClass = ClassDecl->getSuperClass();
1381 while (SuperClass) {
13
Loop condition is true. Entering loop body
17
Loop condition is false. Execution continues on line 1385
1382 RewriteInterfaceDecl(SuperClass);
14
Calling 'RewriteModernObjC::RewriteInterfaceDecl'
1383 SuperClass = SuperClass->getSuperClass();
1384 }
1385 std::string ResultStr;
1386 if (!ObjCWrittenInterfaces.count(ClassDecl->getCanonicalDecl())) {
18
Assuming the condition is true
19
Taking true branch
1387 // we haven't seen a forward decl - generate a typedef.
1388 RewriteOneForwardClassDecl(ClassDecl, ResultStr);
1389 RewriteIvarOffsetSymbols(ClassDecl, ResultStr);
1390
1391 RewriteObjCInternalStruct(ClassDecl, ResultStr);
20
Calling 'RewriteModernObjC::RewriteObjCInternalStruct'
1392 // Mark this typedef as having been written into its c++ equivalent.
1393 ObjCWrittenInterfaces.insert(ClassDecl->getCanonicalDecl());
1394
1395 for (auto *I : ClassDecl->instance_properties())
1396 RewriteProperty(I);
1397 for (auto *I : ClassDecl->instance_methods())
1398 RewriteMethodDeclaration(I);
1399 for (auto *I : ClassDecl->class_methods())
1400 RewriteMethodDeclaration(I);
1401
1402 // Lastly, comment out the @end.
1403 ReplaceText(ClassDecl->getAtEndRange().getBegin(), strlen("@end"),
1404 "/* @end */\n");
1405 }
1406}
1407
1408Stmt *RewriteModernObjC::RewritePropertyOrImplicitSetter(PseudoObjectExpr *PseudoOp) {
1409 SourceRange OldRange = PseudoOp->getSourceRange();
1410
1411 // We just magically know some things about the structure of this
1412 // expression.
1413 ObjCMessageExpr *OldMsg =
1414 cast<ObjCMessageExpr>(PseudoOp->getSemanticExpr(
1415 PseudoOp->getNumSemanticExprs() - 1));
1416
1417 // Because the rewriter doesn't allow us to rewrite rewritten code,
1418 // we need to suppress rewriting the sub-statements.
1419 Expr *Base;
1420 SmallVector<Expr*, 2> Args;
1421 {
1422 DisableReplaceStmtScope S(*this);
1423
1424 // Rebuild the base expression if we have one.
1425 Base = nullptr;
1426 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1427 Base = OldMsg->getInstanceReceiver();
1428 Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1429 Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1430 }
1431
1432 unsigned numArgs = OldMsg->getNumArgs();
1433 for (unsigned i = 0; i < numArgs; i++) {
1434 Expr *Arg = OldMsg->getArg(i);
1435 if (isa<OpaqueValueExpr>(Arg))
1436 Arg = cast<OpaqueValueExpr>(Arg)->getSourceExpr();
1437 Arg = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Arg));
1438 Args.push_back(Arg);
1439 }
1440 }
1441
1442 // TODO: avoid this copy.
1443 SmallVector<SourceLocation, 1> SelLocs;
1444 OldMsg->getSelectorLocs(SelLocs);
1445
1446 ObjCMessageExpr *NewMsg = nullptr;
1447 switch (OldMsg->getReceiverKind()) {
1448 case ObjCMessageExpr::Class:
1449 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1450 OldMsg->getValueKind(),
1451 OldMsg->getLeftLoc(),
1452 OldMsg->getClassReceiverTypeInfo(),
1453 OldMsg->getSelector(),
1454 SelLocs,
1455 OldMsg->getMethodDecl(),
1456 Args,
1457 OldMsg->getRightLoc(),
1458 OldMsg->isImplicit());
1459 break;
1460
1461 case ObjCMessageExpr::Instance:
1462 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1463 OldMsg->getValueKind(),
1464 OldMsg->getLeftLoc(),
1465 Base,
1466 OldMsg->getSelector(),
1467 SelLocs,
1468 OldMsg->getMethodDecl(),
1469 Args,
1470 OldMsg->getRightLoc(),
1471 OldMsg->isImplicit());
1472 break;
1473
1474 case ObjCMessageExpr::SuperClass:
1475 case ObjCMessageExpr::SuperInstance:
1476 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1477 OldMsg->getValueKind(),
1478 OldMsg->getLeftLoc(),
1479 OldMsg->getSuperLoc(),
1480 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1481 OldMsg->getSuperType(),
1482 OldMsg->getSelector(),
1483 SelLocs,
1484 OldMsg->getMethodDecl(),
1485 Args,
1486 OldMsg->getRightLoc(),
1487 OldMsg->isImplicit());
1488 break;
1489 }
1490
1491 Stmt *Replacement = SynthMessageExpr(NewMsg);
1492 ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1493 return Replacement;
1494}
1495
1496Stmt *RewriteModernObjC::RewritePropertyOrImplicitGetter(PseudoObjectExpr *PseudoOp) {
1497 SourceRange OldRange = PseudoOp->getSourceRange();
1498
1499 // We just magically know some things about the structure of this
1500 // expression.
1501 ObjCMessageExpr *OldMsg =
1502 cast<ObjCMessageExpr>(PseudoOp->getResultExpr()->IgnoreImplicit());
1503
1504 // Because the rewriter doesn't allow us to rewrite rewritten code,
1505 // we need to suppress rewriting the sub-statements.
1506 Expr *Base = nullptr;
1507 SmallVector<Expr*, 1> Args;
1508 {
1509 DisableReplaceStmtScope S(*this);
1510 // Rebuild the base expression if we have one.
1511 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1512 Base = OldMsg->getInstanceReceiver();
1513 Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1514 Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1515 }
1516 unsigned numArgs = OldMsg->getNumArgs();
1517 for (unsigned i = 0; i < numArgs; i++) {
1518 Expr *Arg = OldMsg->getArg(i);
1519 if (isa<OpaqueValueExpr>(Arg))
1520 Arg = cast<OpaqueValueExpr>(Arg)->getSourceExpr();
1521 Arg = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Arg));
1522 Args.push_back(Arg);
1523 }
1524 }
1525
1526 // Intentionally empty.
1527 SmallVector<SourceLocation, 1> SelLocs;
1528
1529 ObjCMessageExpr *NewMsg = nullptr;
1530 switch (OldMsg->getReceiverKind()) {
1531 case ObjCMessageExpr::Class:
1532 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1533 OldMsg->getValueKind(),
1534 OldMsg->getLeftLoc(),
1535 OldMsg->getClassReceiverTypeInfo(),
1536 OldMsg->getSelector(),
1537 SelLocs,
1538 OldMsg->getMethodDecl(),
1539 Args,
1540 OldMsg->getRightLoc(),
1541 OldMsg->isImplicit());
1542 break;
1543
1544 case ObjCMessageExpr::Instance:
1545 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1546 OldMsg->getValueKind(),
1547 OldMsg->getLeftLoc(),
1548 Base,
1549 OldMsg->getSelector(),
1550 SelLocs,
1551 OldMsg->getMethodDecl(),
1552 Args,
1553 OldMsg->getRightLoc(),
1554 OldMsg->isImplicit());
1555 break;
1556
1557 case ObjCMessageExpr::SuperClass:
1558 case ObjCMessageExpr::SuperInstance:
1559 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1560 OldMsg->getValueKind(),
1561 OldMsg->getLeftLoc(),
1562 OldMsg->getSuperLoc(),
1563 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1564 OldMsg->getSuperType(),
1565 OldMsg->getSelector(),
1566 SelLocs,
1567 OldMsg->getMethodDecl(),
1568 Args,
1569 OldMsg->getRightLoc(),
1570 OldMsg->isImplicit());
1571 break;
1572 }
1573
1574 Stmt *Replacement = SynthMessageExpr(NewMsg);
1575 ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1576 return Replacement;
1577}
1578
1579/// SynthCountByEnumWithState - To print:
1580/// ((NSUInteger (*)
1581/// (id, SEL, struct __objcFastEnumerationState *, id *, NSUInteger))
1582/// (void *)objc_msgSend)((id)l_collection,
1583/// sel_registerName(
1584/// "countByEnumeratingWithState:objects:count:"),
1585/// &enumState,
1586/// (id *)__rw_items, (NSUInteger)16)
1587///
1588void RewriteModernObjC::SynthCountByEnumWithState(std::string &buf) {
1589 buf += "((_WIN_NSUInteger (*) (id, SEL, struct __objcFastEnumerationState *, "
1590 "id *, _WIN_NSUInteger))(void *)objc_msgSend)";
1591 buf += "\n\t\t";
1592 buf += "((id)l_collection,\n\t\t";
1593 buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
1594 buf += "\n\t\t";
1595 buf += "&enumState, "
1596 "(id *)__rw_items, (_WIN_NSUInteger)16)";
1597}
1598
1599/// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
1600/// statement to exit to its outer synthesized loop.
1601///
1602Stmt *RewriteModernObjC::RewriteBreakStmt(BreakStmt *S) {
1603 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1604 return S;
1605 // replace break with goto __break_label
1606 std::string buf;
1607
1608 SourceLocation startLoc = S->getBeginLoc();
1609 buf = "goto __break_label_";
1610 buf += utostr(ObjCBcLabelNo.back());
1611 ReplaceText(startLoc, strlen("break"), buf);
1612
1613 return nullptr;
1614}
1615
1616void RewriteModernObjC::ConvertSourceLocationToLineDirective(
1617 SourceLocation Loc,
1618 std::string &LineString) {
1619 if (Loc.isFileID() && GenerateLineInfo) {
1620 LineString += "\n#line ";
1621 PresumedLoc PLoc = SM->getPresumedLoc(Loc);
1622 LineString += utostr(PLoc.getLine());
1623 LineString += " \"";
1624 LineString += Lexer::Stringify(PLoc.getFilename());
1625 LineString += "\"\n";
1626 }
1627}
1628
1629/// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
1630/// statement to continue with its inner synthesized loop.
1631///
1632Stmt *RewriteModernObjC::RewriteContinueStmt(ContinueStmt *S) {
1633 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1634 return S;
1635 // replace continue with goto __continue_label
1636 std::string buf;
1637
1638 SourceLocation startLoc = S->getBeginLoc();
1639 buf = "goto __continue_label_";
1640 buf += utostr(ObjCBcLabelNo.back());
1641 ReplaceText(startLoc, strlen("continue"), buf);
1642
1643 return nullptr;
1644}
1645
1646/// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
1647/// It rewrites:
1648/// for ( type elem in collection) { stmts; }
1649
1650/// Into:
1651/// {
1652/// type elem;
1653/// struct __objcFastEnumerationState enumState = { 0 };
1654/// id __rw_items[16];
1655/// id l_collection = (id)collection;
1656/// NSUInteger limit = [l_collection countByEnumeratingWithState:&enumState
1657/// objects:__rw_items count:16];
1658/// if (limit) {
1659/// unsigned long startMutations = *enumState.mutationsPtr;
1660/// do {
1661/// unsigned long counter = 0;
1662/// do {
1663/// if (startMutations != *enumState.mutationsPtr)
1664/// objc_enumerationMutation(l_collection);
1665/// elem = (type)enumState.itemsPtr[counter++];
1666/// stmts;
1667/// __continue_label: ;
1668/// } while (counter < limit);
1669/// } while ((limit = [l_collection countByEnumeratingWithState:&enumState
1670/// objects:__rw_items count:16]));
1671/// elem = nil;
1672/// __break_label: ;
1673/// }
1674/// else
1675/// elem = nil;
1676/// }
1677///
1678Stmt *RewriteModernObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
1679 SourceLocation OrigEnd) {
1680 assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty")((!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty"
) ? static_cast<void> (0) : __assert_fail ("!Stmts.empty() && \"ObjCForCollectionStmt - Statement stack empty\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1680, __PRETTY_FUNCTION__))
;
1681 assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&((isa<ObjCForCollectionStmt>(Stmts.back()) && "ObjCForCollectionStmt Statement stack mismatch"
) ? static_cast<void> (0) : __assert_fail ("isa<ObjCForCollectionStmt>(Stmts.back()) && \"ObjCForCollectionStmt Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1682, __PRETTY_FUNCTION__))
1682 "ObjCForCollectionStmt Statement stack mismatch")((isa<ObjCForCollectionStmt>(Stmts.back()) && "ObjCForCollectionStmt Statement stack mismatch"
) ? static_cast<void> (0) : __assert_fail ("isa<ObjCForCollectionStmt>(Stmts.back()) && \"ObjCForCollectionStmt Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1682, __PRETTY_FUNCTION__))
;
1683 assert(!ObjCBcLabelNo.empty() &&((!ObjCBcLabelNo.empty() && "ObjCForCollectionStmt - Label No stack empty"
) ? static_cast<void> (0) : __assert_fail ("!ObjCBcLabelNo.empty() && \"ObjCForCollectionStmt - Label No stack empty\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1684, __PRETTY_FUNCTION__))
1684 "ObjCForCollectionStmt - Label No stack empty")((!ObjCBcLabelNo.empty() && "ObjCForCollectionStmt - Label No stack empty"
) ? static_cast<void> (0) : __assert_fail ("!ObjCBcLabelNo.empty() && \"ObjCForCollectionStmt - Label No stack empty\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1684, __PRETTY_FUNCTION__))
;
1685
1686 SourceLocation startLoc = S->getBeginLoc();
1687 const char *startBuf = SM->getCharacterData(startLoc);
1688 StringRef elementName;
1689 std::string elementTypeAsString;
1690 std::string buf;
1691 // line directive first.
1692 SourceLocation ForEachLoc = S->getForLoc();
1693 ConvertSourceLocationToLineDirective(ForEachLoc, buf);
1694 buf += "{\n\t";
1695 if (DeclStmt *DS = dyn_cast<DeclStmt>(S->getElement())) {
1696 // type elem;
1697 NamedDecl* D = cast<NamedDecl>(DS->getSingleDecl());
1698 QualType ElementType = cast<ValueDecl>(D)->getType();
1699 if (ElementType->isObjCQualifiedIdType() ||
1700 ElementType->isObjCQualifiedInterfaceType())
1701 // Simply use 'id' for all qualified types.
1702 elementTypeAsString = "id";
1703 else
1704 elementTypeAsString = ElementType.getAsString(Context->getPrintingPolicy());
1705 buf += elementTypeAsString;
1706 buf += " ";
1707 elementName = D->getName();
1708 buf += elementName;
1709 buf += ";\n\t";
1710 }
1711 else {
1712 DeclRefExpr *DR = cast<DeclRefExpr>(S->getElement());
1713 elementName = DR->getDecl()->getName();
1714 ValueDecl *VD = DR->getDecl();
1715 if (VD->getType()->isObjCQualifiedIdType() ||
1716 VD->getType()->isObjCQualifiedInterfaceType())
1717 // Simply use 'id' for all qualified types.
1718 elementTypeAsString = "id";
1719 else
1720 elementTypeAsString = VD->getType().getAsString(Context->getPrintingPolicy());
1721 }
1722
1723 // struct __objcFastEnumerationState enumState = { 0 };
1724 buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
1725 // id __rw_items[16];
1726 buf += "id __rw_items[16];\n\t";
1727 // id l_collection = (id)
1728 buf += "id l_collection = (id)";
1729 // Find start location of 'collection' the hard way!
1730 const char *startCollectionBuf = startBuf;
1731 startCollectionBuf += 3; // skip 'for'
1732 startCollectionBuf = strchr(startCollectionBuf, '(');
1733 startCollectionBuf++; // skip '('
1734 // find 'in' and skip it.
1735 while (*startCollectionBuf != ' ' ||
1736 *(startCollectionBuf+1) != 'i' || *(startCollectionBuf+2) != 'n' ||
1737 (*(startCollectionBuf+3) != ' ' &&
1738 *(startCollectionBuf+3) != '[' && *(startCollectionBuf+3) != '('))
1739 startCollectionBuf++;
1740 startCollectionBuf += 3;
1741
1742 // Replace: "for (type element in" with string constructed thus far.
1743 ReplaceText(startLoc, startCollectionBuf - startBuf, buf);
1744 // Replace ')' in for '(' type elem in collection ')' with ';'
1745 SourceLocation rightParenLoc = S->getRParenLoc();
1746 const char *rparenBuf = SM->getCharacterData(rightParenLoc);
1747 SourceLocation lparenLoc = startLoc.getLocWithOffset(rparenBuf-startBuf);
1748 buf = ";\n\t";
1749
1750 // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1751 // objects:__rw_items count:16];
1752 // which is synthesized into:
1753 // NSUInteger limit =
1754 // ((NSUInteger (*)
1755 // (id, SEL, struct __objcFastEnumerationState *, id *, NSUInteger))
1756 // (void *)objc_msgSend)((id)l_collection,
1757 // sel_registerName(
1758 // "countByEnumeratingWithState:objects:count:"),
1759 // (struct __objcFastEnumerationState *)&state,
1760 // (id *)__rw_items, (NSUInteger)16);
1761 buf += "_WIN_NSUInteger limit =\n\t\t";
1762 SynthCountByEnumWithState(buf);
1763 buf += ";\n\t";
1764 /// if (limit) {
1765 /// unsigned long startMutations = *enumState.mutationsPtr;
1766 /// do {
1767 /// unsigned long counter = 0;
1768 /// do {
1769 /// if (startMutations != *enumState.mutationsPtr)
1770 /// objc_enumerationMutation(l_collection);
1771 /// elem = (type)enumState.itemsPtr[counter++];
1772 buf += "if (limit) {\n\t";
1773 buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
1774 buf += "do {\n\t\t";
1775 buf += "unsigned long counter = 0;\n\t\t";
1776 buf += "do {\n\t\t\t";
1777 buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
1778 buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
1779 buf += elementName;
1780 buf += " = (";
1781 buf += elementTypeAsString;
1782 buf += ")enumState.itemsPtr[counter++];";
1783 // Replace ')' in for '(' type elem in collection ')' with all of these.
1784 ReplaceText(lparenLoc, 1, buf);
1785
1786 /// __continue_label: ;
1787 /// } while (counter < limit);
1788 /// } while ((limit = [l_collection countByEnumeratingWithState:&enumState
1789 /// objects:__rw_items count:16]));
1790 /// elem = nil;
1791 /// __break_label: ;
1792 /// }
1793 /// else
1794 /// elem = nil;
1795 /// }
1796 ///
1797 buf = ";\n\t";
1798 buf += "__continue_label_";
1799 buf += utostr(ObjCBcLabelNo.back());
1800 buf += ": ;";
1801 buf += "\n\t\t";
1802 buf += "} while (counter < limit);\n\t";
1803 buf += "} while ((limit = ";
1804 SynthCountByEnumWithState(buf);
1805 buf += "));\n\t";
1806 buf += elementName;
1807 buf += " = ((";
1808 buf += elementTypeAsString;
1809 buf += ")0);\n\t";
1810 buf += "__break_label_";
1811 buf += utostr(ObjCBcLabelNo.back());
1812 buf += ": ;\n\t";
1813 buf += "}\n\t";
1814 buf += "else\n\t\t";
1815 buf += elementName;
1816 buf += " = ((";
1817 buf += elementTypeAsString;
1818 buf += ")0);\n\t";
1819 buf += "}\n";
1820
1821 // Insert all these *after* the statement body.
1822 // FIXME: If this should support Obj-C++, support CXXTryStmt
1823 if (isa<CompoundStmt>(S->getBody())) {
1824 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(1);
1825 InsertText(endBodyLoc, buf);
1826 } else {
1827 /* Need to treat single statements specially. For example:
1828 *
1829 * for (A *a in b) if (stuff()) break;
1830 * for (A *a in b) xxxyy;
1831 *
1832 * The following code simply scans ahead to the semi to find the actual end.
1833 */
1834 const char *stmtBuf = SM->getCharacterData(OrigEnd);
1835 const char *semiBuf = strchr(stmtBuf, ';');
1836 assert(semiBuf && "Can't find ';'")((semiBuf && "Can't find ';'") ? static_cast<void>
(0) : __assert_fail ("semiBuf && \"Can't find ';'\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1836, __PRETTY_FUNCTION__))
;
1837 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(semiBuf-stmtBuf+1);
1838 InsertText(endBodyLoc, buf);
1839 }
1840 Stmts.pop_back();
1841 ObjCBcLabelNo.pop_back();
1842 return nullptr;
1843}
1844
1845static void Write_RethrowObject(std::string &buf) {
1846 buf += "{ struct _FIN { _FIN(id reth) : rethrow(reth) {}\n";
1847 buf += "\t~_FIN() { if (rethrow) objc_exception_throw(rethrow); }\n";
1848 buf += "\tid rethrow;\n";
1849 buf += "\t} _fin_force_rethow(_rethrow);";
1850}
1851
1852/// RewriteObjCSynchronizedStmt -
1853/// This routine rewrites @synchronized(expr) stmt;
1854/// into:
1855/// objc_sync_enter(expr);
1856/// @try stmt @finally { objc_sync_exit(expr); }
1857///
1858Stmt *RewriteModernObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1859 // Get the start location and compute the semi location.
1860 SourceLocation startLoc = S->getBeginLoc();
1861 const char *startBuf = SM->getCharacterData(startLoc);
1862
1863 assert((*startBuf == '@') && "bogus @synchronized location")(((*startBuf == '@') && "bogus @synchronized location"
) ? static_cast<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @synchronized location\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1863, __PRETTY_FUNCTION__))
;
1864
1865 std::string buf;
1866 SourceLocation SynchLoc = S->getAtSynchronizedLoc();
1867 ConvertSourceLocationToLineDirective(SynchLoc, buf);
1868 buf += "{ id _rethrow = 0; id _sync_obj = (id)";
1869
1870 const char *lparenBuf = startBuf;
1871 while (*lparenBuf != '(') lparenBuf++;
1872 ReplaceText(startLoc, lparenBuf-startBuf+1, buf);
1873
1874 buf = "; objc_sync_enter(_sync_obj);\n";
1875 buf += "try {\n\tstruct _SYNC_EXIT { _SYNC_EXIT(id arg) : sync_exit(arg) {}";
1876 buf += "\n\t~_SYNC_EXIT() {objc_sync_exit(sync_exit);}";
1877 buf += "\n\tid sync_exit;";
1878 buf += "\n\t} _sync_exit(_sync_obj);\n";
1879
1880 // We can't use S->getSynchExpr()->getEndLoc() to find the end location, since
1881 // the sync expression is typically a message expression that's already
1882 // been rewritten! (which implies the SourceLocation's are invalid).
1883 SourceLocation RParenExprLoc = S->getSynchBody()->getBeginLoc();
1884 const char *RParenExprLocBuf = SM->getCharacterData(RParenExprLoc);
1885 while (*RParenExprLocBuf != ')') RParenExprLocBuf--;
1886 RParenExprLoc = startLoc.getLocWithOffset(RParenExprLocBuf-startBuf);
1887
1888 SourceLocation LBranceLoc = S->getSynchBody()->getBeginLoc();
1889 const char *LBraceLocBuf = SM->getCharacterData(LBranceLoc);
1890 assert (*LBraceLocBuf == '{')((*LBraceLocBuf == '{') ? static_cast<void> (0) : __assert_fail
("*LBraceLocBuf == '{'", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1890, __PRETTY_FUNCTION__))
;
1891 ReplaceText(RParenExprLoc, (LBraceLocBuf - SM->getCharacterData(RParenExprLoc) + 1), buf);
1892
1893 SourceLocation startRBraceLoc = S->getSynchBody()->getEndLoc();
1894 assert((*SM->getCharacterData(startRBraceLoc) == '}') &&(((*SM->getCharacterData(startRBraceLoc) == '}') &&
"bogus @synchronized block") ? static_cast<void> (0) :
__assert_fail ("(*SM->getCharacterData(startRBraceLoc) == '}') && \"bogus @synchronized block\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1895, __PRETTY_FUNCTION__))
1895 "bogus @synchronized block")(((*SM->getCharacterData(startRBraceLoc) == '}') &&
"bogus @synchronized block") ? static_cast<void> (0) :
__assert_fail ("(*SM->getCharacterData(startRBraceLoc) == '}') && \"bogus @synchronized block\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1895, __PRETTY_FUNCTION__))
;
1896
1897 buf = "} catch (id e) {_rethrow = e;}\n";
1898 Write_RethrowObject(buf);
1899 buf += "}\n";
1900 buf += "}\n";
1901
1902 ReplaceText(startRBraceLoc, 1, buf);
1903
1904 return nullptr;
1905}
1906
1907void RewriteModernObjC::WarnAboutReturnGotoStmts(Stmt *S)
1908{
1909 // Perform a bottom up traversal of all children.
1910 for (Stmt *SubStmt : S->children())
1911 if (SubStmt)
1912 WarnAboutReturnGotoStmts(SubStmt);
1913
1914 if (isa<ReturnStmt>(S) || isa<GotoStmt>(S)) {
1915 Diags.Report(Context->getFullLoc(S->getBeginLoc()),
1916 TryFinallyContainsReturnDiag);
1917 }
1918}
1919
1920Stmt *RewriteModernObjC::RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
1921 SourceLocation startLoc = S->getAtLoc();
1922 ReplaceText(startLoc, strlen("@autoreleasepool"), "/* @autoreleasepool */");
1923 ReplaceText(S->getSubStmt()->getBeginLoc(), 1,
1924 "{ __AtAutoreleasePool __autoreleasepool; ");
1925
1926 return nullptr;
1927}
1928
1929Stmt *RewriteModernObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
1930 ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt();
1931 bool noCatch = S->getNumCatchStmts() == 0;
1932 std::string buf;
1933 SourceLocation TryLocation = S->getAtTryLoc();
1934 ConvertSourceLocationToLineDirective(TryLocation, buf);
1935
1936 if (finalStmt) {
1937 if (noCatch)
1938 buf += "{ id volatile _rethrow = 0;\n";
1939 else {
1940 buf += "{ id volatile _rethrow = 0;\ntry {\n";
1941 }
1942 }
1943 // Get the start location and compute the semi location.
1944 SourceLocation startLoc = S->getBeginLoc();
1945 const char *startBuf = SM->getCharacterData(startLoc);
1946
1947 assert((*startBuf == '@') && "bogus @try location")(((*startBuf == '@') && "bogus @try location") ? static_cast
<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @try location\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1947, __PRETTY_FUNCTION__))
;
1948 if (finalStmt)
1949 ReplaceText(startLoc, 1, buf);
1950 else
1951 // @try -> try
1952 ReplaceText(startLoc, 1, "");
1953
1954 for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I) {
1955 ObjCAtCatchStmt *Catch = S->getCatchStmt(I);
1956 VarDecl *catchDecl = Catch->getCatchParamDecl();
1957
1958 startLoc = Catch->getBeginLoc();
1959 bool AtRemoved = false;
1960 if (catchDecl) {
1961 QualType t = catchDecl->getType();
1962 if (const ObjCObjectPointerType *Ptr = t->getAs<ObjCObjectPointerType>()) {
1963 // Should be a pointer to a class.
1964 ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
1965 if (IDecl) {
1966 std::string Result;
1967 ConvertSourceLocationToLineDirective(Catch->getBeginLoc(), Result);
1968
1969 startBuf = SM->getCharacterData(startLoc);
1970 assert((*startBuf == '@') && "bogus @catch location")(((*startBuf == '@') && "bogus @catch location") ? static_cast
<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @catch location\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1970, __PRETTY_FUNCTION__))
;
1971 SourceLocation rParenLoc = Catch->getRParenLoc();
1972 const char *rParenBuf = SM->getCharacterData(rParenLoc);
1973
1974 // _objc_exc_Foo *_e as argument to catch.
1975 Result += "catch (_objc_exc_"; Result += IDecl->getNameAsString();
1976 Result += " *_"; Result += catchDecl->getNameAsString();
1977 Result += ")";
1978 ReplaceText(startLoc, rParenBuf-startBuf+1, Result);
1979 // Foo *e = (Foo *)_e;
1980 Result.clear();
1981 Result = "{ ";
1982 Result += IDecl->getNameAsString();
1983 Result += " *"; Result += catchDecl->getNameAsString();
1984 Result += " = ("; Result += IDecl->getNameAsString(); Result += "*)";
1985 Result += "_"; Result += catchDecl->getNameAsString();
1986
1987 Result += "; ";
1988 SourceLocation lBraceLoc = Catch->getCatchBody()->getBeginLoc();
1989 ReplaceText(lBraceLoc, 1, Result);
1990 AtRemoved = true;
1991 }
1992 }
1993 }
1994 if (!AtRemoved)
1995 // @catch -> catch
1996 ReplaceText(startLoc, 1, "");
1997
1998 }
1999 if (finalStmt) {
2000 buf.clear();
2001 SourceLocation FinallyLoc = finalStmt->getBeginLoc();
2002
2003 if (noCatch) {
2004 ConvertSourceLocationToLineDirective(FinallyLoc, buf);
2005 buf += "catch (id e) {_rethrow = e;}\n";
2006 }
2007 else {
2008 buf += "}\n";
2009 ConvertSourceLocationToLineDirective(FinallyLoc, buf);
2010 buf += "catch (id e) {_rethrow = e;}\n";
2011 }
2012
2013 SourceLocation startFinalLoc = finalStmt->getBeginLoc();
2014 ReplaceText(startFinalLoc, 8, buf);
2015 Stmt *body = finalStmt->getFinallyBody();
2016 SourceLocation startFinalBodyLoc = body->getBeginLoc();
2017 buf.clear();
2018 Write_RethrowObject(buf);
2019 ReplaceText(startFinalBodyLoc, 1, buf);
2020
2021 SourceLocation endFinalBodyLoc = body->getEndLoc();
2022 ReplaceText(endFinalBodyLoc, 1, "}\n}");
2023 // Now check for any return/continue/go statements within the @try.
2024 WarnAboutReturnGotoStmts(S->getTryBody());
2025 }
2026
2027 return nullptr;
2028}
2029
2030// This can't be done with ReplaceStmt(S, ThrowExpr), since
2031// the throw expression is typically a message expression that's already
2032// been rewritten! (which implies the SourceLocation's are invalid).
2033Stmt *RewriteModernObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
2034 // Get the start location and compute the semi location.
2035 SourceLocation startLoc = S->getBeginLoc();
2036 const char *startBuf = SM->getCharacterData(startLoc);
2037
2038 assert((*startBuf == '@') && "bogus @throw location")(((*startBuf == '@') && "bogus @throw location") ? static_cast
<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @throw location\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2038, __PRETTY_FUNCTION__))
;
2039
2040 std::string buf;
2041 /* void objc_exception_throw(id) __attribute__((noreturn)); */
2042 if (S->getThrowExpr())
2043 buf = "objc_exception_throw(";
2044 else
2045 buf = "throw";
2046
2047 // handle "@ throw" correctly.
2048 const char *wBuf = strchr(startBuf, 'w');
2049 assert((*wBuf == 'w') && "@throw: can't find 'w'")(((*wBuf == 'w') && "@throw: can't find 'w'") ? static_cast
<void> (0) : __assert_fail ("(*wBuf == 'w') && \"@throw: can't find 'w'\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2049, __PRETTY_FUNCTION__))
;
2050 ReplaceText(startLoc, wBuf-startBuf+1, buf);
2051
2052 SourceLocation endLoc = S->getEndLoc();
2053 const char *endBuf = SM->getCharacterData(endLoc);
2054 const char *semiBuf = strchr(endBuf, ';');
2055 assert((*semiBuf == ';') && "@throw: can't find ';'")(((*semiBuf == ';') && "@throw: can't find ';'") ? static_cast
<void> (0) : __assert_fail ("(*semiBuf == ';') && \"@throw: can't find ';'\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2055, __PRETTY_FUNCTION__))
;
2056 SourceLocation semiLoc = startLoc.getLocWithOffset(semiBuf-startBuf);
2057 if (S->getThrowExpr())
2058 ReplaceText(semiLoc, 1, ");");
2059 return nullptr;
2060}
2061
2062Stmt *RewriteModernObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
2063 // Create a new string expression.
2064 std::string StrEncoding;
2065 Context->getObjCEncodingForType(Exp->getEncodedType(), StrEncoding);
2066 Expr *Replacement = getStringLiteral(StrEncoding);
2067 ReplaceStmt(Exp, Replacement);
2068
2069 // Replace this subexpr in the parent.
2070 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2071 return Replacement;
2072}
2073
2074Stmt *RewriteModernObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
2075 if (!SelGetUidFunctionDecl)
2076 SynthSelGetUidFunctionDecl();
2077 assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl")((SelGetUidFunctionDecl && "Can't find sel_registerName() decl"
) ? static_cast<void> (0) : __assert_fail ("SelGetUidFunctionDecl && \"Can't find sel_registerName() decl\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2077, __PRETTY_FUNCTION__))
;
2078 // Create a call to sel_registerName("selName").
2079 SmallVector<Expr*, 8> SelExprs;
2080 SelExprs.push_back(getStringLiteral(Exp->getSelector().getAsString()));
2081 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2082 SelExprs);
2083 ReplaceStmt(Exp, SelExp);
2084 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2085 return SelExp;
2086}
2087
2088CallExpr *
2089RewriteModernObjC::SynthesizeCallToFunctionDecl(FunctionDecl *FD,
2090 ArrayRef<Expr *> Args,
2091 SourceLocation StartLoc,
2092 SourceLocation EndLoc) {
2093 // Get the type, we will need to reference it in a couple spots.
2094 QualType msgSendType = FD->getType();
2095
2096 // Create a reference to the objc_msgSend() declaration.
2097 DeclRefExpr *DRE = new (Context) DeclRefExpr(*Context, FD, false, msgSendType,
2098 VK_LValue, SourceLocation());
2099
2100 // Now, we cast the reference to a pointer to the objc_msgSend type.
2101 QualType pToFunc = Context->getPointerType(msgSendType);
2102 ImplicitCastExpr *ICE =
2103 ImplicitCastExpr::Create(*Context, pToFunc, CK_FunctionToPointerDecay,
2104 DRE, nullptr, VK_RValue);
2105
2106 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2107
2108 CallExpr *Exp = CallExpr::Create(
2109 *Context, ICE, Args, FT->getCallResultType(*Context), VK_RValue, EndLoc);
2110 return Exp;
2111}
2112
2113static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
2114 const char *&startRef, const char *&endRef) {
2115 while (startBuf < endBuf) {
2116 if (*startBuf == '<')
2117 startRef = startBuf; // mark the start.
2118 if (*startBuf == '>') {
2119 if (startRef && *startRef == '<') {
2120 endRef = startBuf; // mark the end.
2121 return true;
2122 }
2123 return false;
2124 }
2125 startBuf++;
2126 }
2127 return false;
2128}
2129
2130static void scanToNextArgument(const char *&argRef) {
2131 int angle = 0;
2132 while (*argRef != ')' && (*argRef != ',' || angle > 0)) {
2133 if (*argRef == '<')
2134 angle++;
2135 else if (*argRef == '>')
2136 angle--;
2137 argRef++;
2138 }
2139 assert(angle == 0 && "scanToNextArgument - bad protocol type syntax")((angle == 0 && "scanToNextArgument - bad protocol type syntax"
) ? static_cast<void> (0) : __assert_fail ("angle == 0 && \"scanToNextArgument - bad protocol type syntax\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2139, __PRETTY_FUNCTION__))
;
2140}
2141
2142bool RewriteModernObjC::needToScanForQualifiers(QualType T) {
2143 if (T->isObjCQualifiedIdType())
2144 return true;
2145 if (const PointerType *PT = T->getAs<PointerType>()) {
2146 if (PT->getPointeeType()->isObjCQualifiedIdType())
2147 return true;
2148 }
2149 if (T->isObjCObjectPointerType()) {
2150 T = T->getPointeeType();
2151 return T->isObjCQualifiedInterfaceType();
2152 }
2153 if (T->isArrayType()) {
2154 QualType ElemTy = Context->getBaseElementType(T);
2155 return needToScanForQualifiers(ElemTy);
2156 }
2157 return false;
2158}
2159
2160void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
2161 QualType Type = E->getType();
2162 if (needToScanForQualifiers(Type)) {
2163 SourceLocation Loc, EndLoc;
2164
2165 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E)) {
2166 Loc = ECE->getLParenLoc();
2167 EndLoc = ECE->getRParenLoc();
2168 } else {
2169 Loc = E->getBeginLoc();
2170 EndLoc = E->getEndLoc();
2171 }
2172 // This will defend against trying to rewrite synthesized expressions.
2173 if (Loc.isInvalid() || EndLoc.isInvalid())
2174 return;
2175
2176 const char *startBuf = SM->getCharacterData(Loc);
2177 const char *endBuf = SM->getCharacterData(EndLoc);
2178 const char *startRef = nullptr, *endRef = nullptr;
2179 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2180 // Get the locations of the startRef, endRef.
2181 SourceLocation LessLoc = Loc.getLocWithOffset(startRef-startBuf);
2182 SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-startBuf+1);
2183 // Comment out the protocol references.
2184 InsertText(LessLoc, "/*");
2185 InsertText(GreaterLoc, "*/");
2186 }
2187 }
2188}
2189
2190void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
2191 SourceLocation Loc;
2192 QualType Type;
2193 const FunctionProtoType *proto = nullptr;
2194 if (VarDecl *VD = dyn_cast<VarDecl>(Dcl)) {
2195 Loc = VD->getLocation();
2196 Type = VD->getType();
2197 }
2198 else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Dcl)) {
2199 Loc = FD->getLocation();
2200 // Check for ObjC 'id' and class types that have been adorned with protocol
2201 // information (id<p>, C<p>*). The protocol references need to be rewritten!
2202 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2203 assert(funcType && "missing function type")((funcType && "missing function type") ? static_cast<
void> (0) : __assert_fail ("funcType && \"missing function type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2203, __PRETTY_FUNCTION__))
;
2204 proto = dyn_cast<FunctionProtoType>(funcType);
2205 if (!proto)
2206 return;
2207 Type = proto->getReturnType();
2208 }
2209 else if (FieldDecl *FD = dyn_cast<FieldDecl>(Dcl)) {
2210 Loc = FD->getLocation();
2211 Type = FD->getType();
2212 }
2213 else if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(Dcl)) {
2214 Loc = TD->getLocation();
2215 Type = TD->getUnderlyingType();
2216 }
2217 else
2218 return;
2219
2220 if (needToScanForQualifiers(Type)) {
2221 // Since types are unique, we need to scan the buffer.
2222
2223 const char *endBuf = SM->getCharacterData(Loc);
2224 const char *startBuf = endBuf;
2225 while (*startBuf != ';' && *startBuf != '<' && startBuf != MainFileStart)
2226 startBuf--; // scan backward (from the decl location) for return type.
2227 const char *startRef = nullptr, *endRef = nullptr;
2228 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2229 // Get the locations of the startRef, endRef.
2230 SourceLocation LessLoc = Loc.getLocWithOffset(startRef-endBuf);
2231 SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-endBuf+1);
2232 // Comment out the protocol references.
2233 InsertText(LessLoc, "/*");
2234 InsertText(GreaterLoc, "*/");
2235 }
2236 }
2237 if (!proto)
2238 return; // most likely, was a variable
2239 // Now check arguments.
2240 const char *startBuf = SM->getCharacterData(Loc);
2241 const char *startFuncBuf = startBuf;
2242 for (unsigned i = 0; i < proto->getNumParams(); i++) {
2243 if (needToScanForQualifiers(proto->getParamType(i))) {
2244 // Since types are unique, we need to scan the buffer.
2245
2246 const char *endBuf = startBuf;
2247 // scan forward (from the decl location) for argument types.
2248 scanToNextArgument(endBuf);
2249 const char *startRef = nullptr, *endRef = nullptr;
2250 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2251 // Get the locations of the startRef, endRef.
2252 SourceLocation LessLoc =
2253 Loc.getLocWithOffset(startRef-startFuncBuf);
2254 SourceLocation GreaterLoc =
2255 Loc.getLocWithOffset(endRef-startFuncBuf+1);
2256 // Comment out the protocol references.
2257 InsertText(LessLoc, "/*");
2258 InsertText(GreaterLoc, "*/");
2259 }
2260 startBuf = ++endBuf;
2261 }
2262 else {
2263 // If the function name is derived from a macro expansion, then the
2264 // argument buffer will not follow the name. Need to speak with Chris.
2265 while (*startBuf && *startBuf != ')' && *startBuf != ',')
2266 startBuf++; // scan forward (from the decl location) for argument types.
2267 startBuf++;
2268 }
2269 }
2270}
2271
2272void RewriteModernObjC::RewriteTypeOfDecl(VarDecl *ND) {
2273 QualType QT = ND->getType();
2274 const Type* TypePtr = QT->getAs<Type>();
2275 if (!isa<TypeOfExprType>(TypePtr))
2276 return;
2277 while (isa<TypeOfExprType>(TypePtr)) {
2278 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
2279 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
2280 TypePtr = QT->getAs<Type>();
2281 }
2282 // FIXME. This will not work for multiple declarators; as in:
2283 // __typeof__(a) b,c,d;
2284 std::string TypeAsString(QT.getAsString(Context->getPrintingPolicy()));
2285 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
2286 const char *startBuf = SM->getCharacterData(DeclLoc);
2287 if (ND->getInit()) {
2288 std::string Name(ND->getNameAsString());
2289 TypeAsString += " " + Name + " = ";
2290 Expr *E = ND->getInit();
2291 SourceLocation startLoc;
2292 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
2293 startLoc = ECE->getLParenLoc();
2294 else
2295 startLoc = E->getBeginLoc();
2296 startLoc = SM->getExpansionLoc(startLoc);
2297 const char *endBuf = SM->getCharacterData(startLoc);
2298 ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2299 }
2300 else {
2301 SourceLocation X = ND->getEndLoc();
2302 X = SM->getExpansionLoc(X);
2303 const char *endBuf = SM->getCharacterData(X);
2304 ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2305 }
2306}
2307
2308// SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
2309void RewriteModernObjC::SynthSelGetUidFunctionDecl() {
2310 IdentifierInfo *SelGetUidIdent = &Context->Idents.get("sel_registerName");
2311 SmallVector<QualType, 16> ArgTys;
2312 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2313 QualType getFuncType =
2314 getSimpleFunctionType(Context->getObjCSelType(), ArgTys);
2315 SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2316 SourceLocation(),
2317 SourceLocation(),
2318 SelGetUidIdent, getFuncType,
2319 nullptr, SC_Extern);
2320}
2321
2322void RewriteModernObjC::RewriteFunctionDecl(FunctionDecl *FD) {
2323 // declared in <objc/objc.h>
2324 if (FD->getIdentifier() &&
2325 FD->getName() == "sel_registerName") {
2326 SelGetUidFunctionDecl = FD;
2327 return;
2328 }
2329 RewriteObjCQualifiedInterfaceTypes(FD);
2330}
2331
2332void RewriteModernObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
2333 std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2334 const char *argPtr = TypeString.c_str();
2335 if (!strchr(argPtr, '^')) {
2336 Str += TypeString;
2337 return;
2338 }
2339 while (*argPtr) {
2340 Str += (*argPtr == '^' ? '*' : *argPtr);
2341 argPtr++;
2342 }
2343}
2344
2345// FIXME. Consolidate this routine with RewriteBlockPointerType.
2346void RewriteModernObjC::RewriteBlockPointerTypeVariable(std::string& Str,
2347 ValueDecl *VD) {
2348 QualType Type = VD->getType();
2349 std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2350 const char *argPtr = TypeString.c_str();
2351 int paren = 0;
2352 while (*argPtr) {
2353 switch (*argPtr) {
2354 case '(':
2355 Str += *argPtr;
2356 paren++;
2357 break;
2358 case ')':
2359 Str += *argPtr;
2360 paren--;
2361 break;
2362 case '^':
2363 Str += '*';
2364 if (paren == 1)
2365 Str += VD->getNameAsString();
2366 break;
2367 default:
2368 Str += *argPtr;
2369 break;
2370 }
2371 argPtr++;
2372 }
2373}
2374
2375void RewriteModernObjC::RewriteBlockLiteralFunctionDecl(FunctionDecl *FD) {
2376 SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
2377 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2378 const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(funcType);
2379 if (!proto)
2380 return;
2381 QualType Type = proto->getReturnType();
2382 std::string FdStr = Type.getAsString(Context->getPrintingPolicy());
2383 FdStr += " ";
2384 FdStr += FD->getName();
2385 FdStr += "(";
2386 unsigned numArgs = proto->getNumParams();
2387 for (unsigned i = 0; i < numArgs; i++) {
2388 QualType ArgType = proto->getParamType(i);
2389 RewriteBlockPointerType(FdStr, ArgType);
2390 if (i+1 < numArgs)
2391 FdStr += ", ";
2392 }
2393 if (FD->isVariadic()) {
2394 FdStr += (numArgs > 0) ? ", ...);\n" : "...);\n";
2395 }
2396 else
2397 FdStr += ");\n";
2398 InsertText(FunLocStart, FdStr);
2399}
2400
2401// SynthSuperConstructorFunctionDecl - id __rw_objc_super(id obj, id super);
2402void RewriteModernObjC::SynthSuperConstructorFunctionDecl() {
2403 if (SuperConstructorFunctionDecl)
2404 return;
2405 IdentifierInfo *msgSendIdent = &Context->Idents.get("__rw_objc_super");
2406 SmallVector<QualType, 16> ArgTys;
2407 QualType argT = Context->getObjCIdType();
2408 assert(!argT.isNull() && "Can't find 'id' type")((!argT.isNull() && "Can't find 'id' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'id' type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2408, __PRETTY_FUNCTION__))
;
2409 ArgTys.push_back(argT);
2410 ArgTys.push_back(argT);
2411 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2412 ArgTys);
2413 SuperConstructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2414 SourceLocation(),
2415 SourceLocation(),
2416 msgSendIdent, msgSendType,
2417 nullptr, SC_Extern);
2418}
2419
2420// SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
2421void RewriteModernObjC::SynthMsgSendFunctionDecl() {
2422 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend");
2423 SmallVector<QualType, 16> ArgTys;
2424 QualType argT = Context->getObjCIdType();
2425 assert(!argT.isNull() && "Can't find 'id' type")((!argT.isNull() && "Can't find 'id' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'id' type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2425, __PRETTY_FUNCTION__))
;
2426 ArgTys.push_back(argT);
2427 argT = Context->getObjCSelType();
2428 assert(!argT.isNull() && "Can't find 'SEL' type")((!argT.isNull() && "Can't find 'SEL' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'SEL' type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2428, __PRETTY_FUNCTION__))
;
2429 ArgTys.push_back(argT);
2430 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2431 ArgTys, /*variadic=*/true);
2432 MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2433 SourceLocation(),
2434 SourceLocation(),
2435 msgSendIdent, msgSendType, nullptr,
2436 SC_Extern);
2437}
2438
2439// SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(void);
2440void RewriteModernObjC::SynthMsgSendSuperFunctionDecl() {
2441 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper");
2442 SmallVector<QualType, 2> ArgTys;
2443 ArgTys.push_back(Context->VoidTy);
2444 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2445 ArgTys, /*variadic=*/true);
2446 MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2447 SourceLocation(),
2448 SourceLocation(),
2449 msgSendIdent, msgSendType,
2450 nullptr, SC_Extern);
2451}
2452
2453// SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
2454void RewriteModernObjC::SynthMsgSendStretFunctionDecl() {
2455 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_stret");
2456 SmallVector<QualType, 16> ArgTys;
2457 QualType argT = Context->getObjCIdType();
2458 assert(!argT.isNull() && "Can't find 'id' type")((!argT.isNull() && "Can't find 'id' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'id' type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2458, __PRETTY_FUNCTION__))
;
2459 ArgTys.push_back(argT);
2460 argT = Context->getObjCSelType();
2461 assert(!argT.isNull() && "Can't find 'SEL' type")((!argT.isNull() && "Can't find 'SEL' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'SEL' type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2461, __PRETTY_FUNCTION__))
;
2462 ArgTys.push_back(argT);
2463 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2464 ArgTys, /*variadic=*/true);
2465 MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2466 SourceLocation(),
2467 SourceLocation(),
2468 msgSendIdent, msgSendType,
2469 nullptr, SC_Extern);
2470}
2471
2472// SynthMsgSendSuperStretFunctionDecl -
2473// id objc_msgSendSuper_stret(void);
2474void RewriteModernObjC::SynthMsgSendSuperStretFunctionDecl() {
2475 IdentifierInfo *msgSendIdent =
2476 &Context->Idents.get("objc_msgSendSuper_stret");
2477 SmallVector<QualType, 2> ArgTys;
2478 ArgTys.push_back(Context->VoidTy);
2479 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2480 ArgTys, /*variadic=*/true);
2481 MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2482 SourceLocation(),
2483 SourceLocation(),
2484 msgSendIdent,
2485 msgSendType, nullptr,
2486 SC_Extern);
2487}
2488
2489// SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
2490void RewriteModernObjC::SynthMsgSendFpretFunctionDecl() {
2491 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_fpret");
2492 SmallVector<QualType, 16> ArgTys;
2493 QualType argT = Context->getObjCIdType();
2494 assert(!argT.isNull() && "Can't find 'id' type")((!argT.isNull() && "Can't find 'id' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'id' type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2494, __PRETTY_FUNCTION__))
;
2495 ArgTys.push_back(argT);
2496 argT = Context->getObjCSelType();
2497 assert(!argT.isNull() && "Can't find 'SEL' type")((!argT.isNull() && "Can't find 'SEL' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'SEL' type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2497, __PRETTY_FUNCTION__))
;
2498 ArgTys.push_back(argT);
2499 QualType msgSendType = getSimpleFunctionType(Context->DoubleTy,
2500 ArgTys, /*variadic=*/true);
2501 MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2502 SourceLocation(),
2503 SourceLocation(),
2504 msgSendIdent, msgSendType,
2505 nullptr, SC_Extern);
2506}
2507
2508// SynthGetClassFunctionDecl - Class objc_getClass(const char *name);
2509void RewriteModernObjC::SynthGetClassFunctionDecl() {
2510 IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getClass");
2511 SmallVector<QualType, 16> ArgTys;
2512 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2513 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2514 ArgTys);
2515 GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2516 SourceLocation(),
2517 SourceLocation(),
2518 getClassIdent, getClassType,
2519 nullptr, SC_Extern);
2520}
2521
2522// SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
2523void RewriteModernObjC::SynthGetSuperClassFunctionDecl() {
2524 IdentifierInfo *getSuperClassIdent =
2525 &Context->Idents.get("class_getSuperclass");
2526 SmallVector<QualType, 16> ArgTys;
2527 ArgTys.push_back(Context->getObjCClassType());
2528 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2529 ArgTys);
2530 GetSuperClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2531 SourceLocation(),
2532 SourceLocation(),
2533 getSuperClassIdent,
2534 getClassType, nullptr,
2535 SC_Extern);
2536}
2537
2538// SynthGetMetaClassFunctionDecl - Class objc_getMetaClass(const char *name);
2539void RewriteModernObjC::SynthGetMetaClassFunctionDecl() {
2540 IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getMetaClass");
2541 SmallVector<QualType, 16> ArgTys;
2542 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2543 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2544 ArgTys);
2545 GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2546 SourceLocation(),
2547 SourceLocation(),
2548 getClassIdent, getClassType,
2549 nullptr, SC_Extern);
2550}
2551
2552Stmt *RewriteModernObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
2553 assert (Exp != nullptr && "Expected non-null ObjCStringLiteral")((Exp != nullptr && "Expected non-null ObjCStringLiteral"
) ? static_cast<void> (0) : __assert_fail ("Exp != nullptr && \"Expected non-null ObjCStringLiteral\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2553, __PRETTY_FUNCTION__))
;
2554 QualType strType = getConstantStringStructType();
2555
2556 std::string S = "__NSConstantStringImpl_";
2557
2558 std::string tmpName = InFileName;
2559 unsigned i;
2560 for (i=0; i < tmpName.length(); i++) {
2561 char c = tmpName.at(i);
2562 // replace any non-alphanumeric characters with '_'.
2563 if (!isAlphanumeric(c))
2564 tmpName[i] = '_';
2565 }
2566 S += tmpName;
2567 S += "_";
2568 S += utostr(NumObjCStringLiterals++);
2569
2570 Preamble += "static __NSConstantStringImpl " + S;
2571 Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
2572 Preamble += "0x000007c8,"; // utf8_str
2573 // The pretty printer for StringLiteral handles escape characters properly.
2574 std::string prettyBufS;
2575 llvm::raw_string_ostream prettyBuf(prettyBufS);
2576 Exp->getString()->printPretty(prettyBuf, nullptr, PrintingPolicy(LangOpts));
2577 Preamble += prettyBuf.str();
2578 Preamble += ",";
2579 Preamble += utostr(Exp->getString()->getByteLength()) + "};\n";
2580
2581 VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
2582 SourceLocation(), &Context->Idents.get(S),
2583 strType, nullptr, SC_Static);
2584 DeclRefExpr *DRE = new (Context)
2585 DeclRefExpr(*Context, NewVD, false, strType, VK_LValue, SourceLocation());
2586 Expr *Unop = new (Context)
2587 UnaryOperator(DRE, UO_AddrOf, Context->getPointerType(DRE->getType()),
2588 VK_RValue, OK_Ordinary, SourceLocation(), false);
2589 // cast to NSConstantString *
2590 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Exp->getType(),
2591 CK_CPointerToObjCPointerCast, Unop);
2592 ReplaceStmt(Exp, cast);
2593 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2594 return cast;
2595}
2596
2597Stmt *RewriteModernObjC::RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp) {
2598 unsigned IntSize =
2599 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
2600
2601 Expr *FlagExp = IntegerLiteral::Create(*Context,
2602 llvm::APInt(IntSize, Exp->getValue()),
2603 Context->IntTy, Exp->getLocation());
2604 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Context->ObjCBuiltinBoolTy,
2605 CK_BitCast, FlagExp);
2606 ParenExpr *PE = new (Context) ParenExpr(Exp->getLocation(), Exp->getExprLoc(),
2607 cast);
2608 ReplaceStmt(Exp, PE);
2609 return PE;
2610}
2611
2612Stmt *RewriteModernObjC::RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp) {
2613 // synthesize declaration of helper functions needed in this routine.
2614 if (!SelGetUidFunctionDecl)
2615 SynthSelGetUidFunctionDecl();
2616 // use objc_msgSend() for all.
2617 if (!MsgSendFunctionDecl)
2618 SynthMsgSendFunctionDecl();
2619 if (!GetClassFunctionDecl)
2620 SynthGetClassFunctionDecl();
2621
2622 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2623 SourceLocation StartLoc = Exp->getBeginLoc();
2624 SourceLocation EndLoc = Exp->getEndLoc();
2625
2626 // Synthesize a call to objc_msgSend().
2627 SmallVector<Expr*, 4> MsgExprs;
2628 SmallVector<Expr*, 4> ClsExprs;
2629
2630 // Create a call to objc_getClass("<BoxingClass>"). It will be the 1st argument.
2631 ObjCMethodDecl *BoxingMethod = Exp->getBoxingMethod();
2632 ObjCInterfaceDecl *BoxingClass = BoxingMethod->getClassInterface();
2633
2634 IdentifierInfo *clsName = BoxingClass->getIdentifier();
2635 ClsExprs.push_back(getStringLiteral(clsName->getName()));
2636 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2637 StartLoc, EndLoc);
2638 MsgExprs.push_back(Cls);
2639
2640 // Create a call to sel_registerName("<BoxingMethod>:"), etc.
2641 // it will be the 2nd argument.
2642 SmallVector<Expr*, 4> SelExprs;
2643 SelExprs.push_back(
2644 getStringLiteral(BoxingMethod->getSelector().getAsString()));
2645 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2646 SelExprs, StartLoc, EndLoc);
2647 MsgExprs.push_back(SelExp);
2648
2649 // User provided sub-expression is the 3rd, and last, argument.
2650 Expr *subExpr = Exp->getSubExpr();
2651 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(subExpr)) {
2652 QualType type = ICE->getType();
2653 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
2654 CastKind CK = CK_BitCast;
2655 if (SubExpr->getType()->isIntegralType(*Context) && type->isBooleanType())
2656 CK = CK_IntegralToBoolean;
2657 subExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, subExpr);
2658 }
2659 MsgExprs.push_back(subExpr);
2660
2661 SmallVector<QualType, 4> ArgTypes;
2662 ArgTypes.push_back(Context->getObjCClassType());
2663 ArgTypes.push_back(Context->getObjCSelType());
2664 for (const auto PI : BoxingMethod->parameters())
2665 ArgTypes.push_back(PI->getType());
2666
2667 QualType returnType = Exp->getType();
2668 // Get the type, we will need to reference it in a couple spots.
2669 QualType msgSendType = MsgSendFlavor->getType();
2670
2671 // Create a reference to the objc_msgSend() declaration.
2672 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2673 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2674
2675 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2676 Context, Context->getPointerType(Context->VoidTy), CK_BitCast, DRE);
2677
2678 // Now do the "normal" pointer to function cast.
2679 QualType castType =
2680 getSimpleFunctionType(returnType, ArgTypes, BoxingMethod->isVariadic());
2681 castType = Context->getPointerType(castType);
2682 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2683 cast);
2684
2685 // Don't forget the parens to enforce the proper binding.
2686 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2687
2688 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2689 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2690 VK_RValue, EndLoc);
2691 ReplaceStmt(Exp, CE);
2692 return CE;
2693}
2694
2695Stmt *RewriteModernObjC::RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp) {
2696 // synthesize declaration of helper functions needed in this routine.
2697 if (!SelGetUidFunctionDecl)
2698 SynthSelGetUidFunctionDecl();
2699 // use objc_msgSend() for all.
2700 if (!MsgSendFunctionDecl)
2701 SynthMsgSendFunctionDecl();
2702 if (!GetClassFunctionDecl)
2703 SynthGetClassFunctionDecl();
2704
2705 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2706 SourceLocation StartLoc = Exp->getBeginLoc();
2707 SourceLocation EndLoc = Exp->getEndLoc();
2708
2709 // Build the expression: __NSContainer_literal(int, ...).arr
2710 QualType IntQT = Context->IntTy;
2711 QualType NSArrayFType =
2712 getSimpleFunctionType(Context->VoidTy, IntQT, true);
2713 std::string NSArrayFName("__NSContainer_literal");
2714 FunctionDecl *NSArrayFD = SynthBlockInitFunctionDecl(NSArrayFName);
2715 DeclRefExpr *NSArrayDRE = new (Context) DeclRefExpr(
2716 *Context, NSArrayFD, false, NSArrayFType, VK_RValue, SourceLocation());
2717
2718 SmallVector<Expr*, 16> InitExprs;
2719 unsigned NumElements = Exp->getNumElements();
2720 unsigned UnsignedIntSize =
2721 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
2722 Expr *count = IntegerLiteral::Create(*Context,
2723 llvm::APInt(UnsignedIntSize, NumElements),
2724 Context->UnsignedIntTy, SourceLocation());
2725 InitExprs.push_back(count);
2726 for (unsigned i = 0; i < NumElements; i++)
2727 InitExprs.push_back(Exp->getElement(i));
2728 Expr *NSArrayCallExpr =
2729 CallExpr::Create(*Context, NSArrayDRE, InitExprs, NSArrayFType, VK_LValue,
2730 SourceLocation());
2731
2732 FieldDecl *ARRFD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
2733 SourceLocation(),
2734 &Context->Idents.get("arr"),
2735 Context->getPointerType(Context->VoidPtrTy),
2736 nullptr, /*BitWidth=*/nullptr,
2737 /*Mutable=*/true, ICIS_NoInit);
2738 MemberExpr *ArrayLiteralME =
2739 MemberExpr::CreateImplicit(*Context, NSArrayCallExpr, false, ARRFD,
2740 ARRFD->getType(), VK_LValue, OK_Ordinary);
2741 QualType ConstIdT = Context->getObjCIdType().withConst();
2742 CStyleCastExpr * ArrayLiteralObjects =
2743 NoTypeInfoCStyleCastExpr(Context,
2744 Context->getPointerType(ConstIdT),
2745 CK_BitCast,
2746 ArrayLiteralME);
2747
2748 // Synthesize a call to objc_msgSend().
2749 SmallVector<Expr*, 32> MsgExprs;
2750 SmallVector<Expr*, 4> ClsExprs;
2751 QualType expType = Exp->getType();
2752
2753 // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2754 ObjCInterfaceDecl *Class =
2755 expType->getPointeeType()->getAs<ObjCObjectType>()->getInterface();
2756
2757 IdentifierInfo *clsName = Class->getIdentifier();
2758 ClsExprs.push_back(getStringLiteral(clsName->getName()));
2759 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2760 StartLoc, EndLoc);
2761 MsgExprs.push_back(Cls);
2762
2763 // Create a call to sel_registerName("arrayWithObjects:count:").
2764 // it will be the 2nd argument.
2765 SmallVector<Expr*, 4> SelExprs;
2766 ObjCMethodDecl *ArrayMethod = Exp->getArrayWithObjectsMethod();
2767 SelExprs.push_back(
2768 getStringLiteral(ArrayMethod->getSelector().getAsString()));
2769 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2770 SelExprs, StartLoc, EndLoc);
2771 MsgExprs.push_back(SelExp);
2772
2773 // (const id [])objects
2774 MsgExprs.push_back(ArrayLiteralObjects);
2775
2776 // (NSUInteger)cnt
2777 Expr *cnt = IntegerLiteral::Create(*Context,
2778 llvm::APInt(UnsignedIntSize, NumElements),
2779 Context->UnsignedIntTy, SourceLocation());
2780 MsgExprs.push_back(cnt);
2781
2782 SmallVector<QualType, 4> ArgTypes;
2783 ArgTypes.push_back(Context->getObjCClassType());
2784 ArgTypes.push_back(Context->getObjCSelType());
2785 for (const auto *PI : ArrayMethod->parameters())
2786 ArgTypes.push_back(PI->getType());
2787
2788 QualType returnType = Exp->getType();
2789 // Get the type, we will need to reference it in a couple spots.
2790 QualType msgSendType = MsgSendFlavor->getType();
2791
2792 // Create a reference to the objc_msgSend() declaration.
2793 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2794 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2795
2796 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2797 Context, Context->getPointerType(Context->VoidTy), CK_BitCast, DRE);
2798
2799 // Now do the "normal" pointer to function cast.
2800 QualType castType =
2801 getSimpleFunctionType(returnType, ArgTypes, ArrayMethod->isVariadic());
2802 castType = Context->getPointerType(castType);
2803 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2804 cast);
2805
2806 // Don't forget the parens to enforce the proper binding.
2807 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2808
2809 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2810 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2811 VK_RValue, EndLoc);
2812 ReplaceStmt(Exp, CE);
2813 return CE;
2814}
2815
2816Stmt *RewriteModernObjC::RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp) {
2817 // synthesize declaration of helper functions needed in this routine.
2818 if (!SelGetUidFunctionDecl)
2819 SynthSelGetUidFunctionDecl();
2820 // use objc_msgSend() for all.
2821 if (!MsgSendFunctionDecl)
2822 SynthMsgSendFunctionDecl();
2823 if (!GetClassFunctionDecl)
2824 SynthGetClassFunctionDecl();
2825
2826 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2827 SourceLocation StartLoc = Exp->getBeginLoc();
2828 SourceLocation EndLoc = Exp->getEndLoc();
2829
2830 // Build the expression: __NSContainer_literal(int, ...).arr
2831 QualType IntQT = Context->IntTy;
2832 QualType NSDictFType =
2833 getSimpleFunctionType(Context->VoidTy, IntQT, true);
2834 std::string NSDictFName("__NSContainer_literal");
2835 FunctionDecl *NSDictFD = SynthBlockInitFunctionDecl(NSDictFName);
2836 DeclRefExpr *NSDictDRE = new (Context) DeclRefExpr(
2837 *Context, NSDictFD, false, NSDictFType, VK_RValue, SourceLocation());
2838
2839 SmallVector<Expr*, 16> KeyExprs;
2840 SmallVector<Expr*, 16> ValueExprs;
2841
2842 unsigned NumElements = Exp->getNumElements();
2843 unsigned UnsignedIntSize =
2844 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
2845 Expr *count = IntegerLiteral::Create(*Context,
2846 llvm::APInt(UnsignedIntSize, NumElements),
2847 Context->UnsignedIntTy, SourceLocation());
2848 KeyExprs.push_back(count);
2849 ValueExprs.push_back(count);
2850 for (unsigned i = 0; i < NumElements; i++) {
2851 ObjCDictionaryElement Element = Exp->getKeyValueElement(i);
2852 KeyExprs.push_back(Element.Key);
2853 ValueExprs.push_back(Element.Value);
2854 }
2855
2856 // (const id [])objects
2857 Expr *NSValueCallExpr =
2858 CallExpr::Create(*Context, NSDictDRE, ValueExprs, NSDictFType, VK_LValue,
2859 SourceLocation());
2860
2861 FieldDecl *ARRFD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
2862 SourceLocation(),
2863 &Context->Idents.get("arr"),
2864 Context->getPointerType(Context->VoidPtrTy),
2865 nullptr, /*BitWidth=*/nullptr,
2866 /*Mutable=*/true, ICIS_NoInit);
2867 MemberExpr *DictLiteralValueME =
2868 MemberExpr::CreateImplicit(*Context, NSValueCallExpr, false, ARRFD,
2869 ARRFD->getType(), VK_LValue, OK_Ordinary);
2870 QualType ConstIdT = Context->getObjCIdType().withConst();
2871 CStyleCastExpr * DictValueObjects =
2872 NoTypeInfoCStyleCastExpr(Context,
2873 Context->getPointerType(ConstIdT),
2874 CK_BitCast,
2875 DictLiteralValueME);
2876 // (const id <NSCopying> [])keys
2877 Expr *NSKeyCallExpr = CallExpr::Create(
2878 *Context, NSDictDRE, KeyExprs, NSDictFType, VK_LValue, SourceLocation());
2879
2880 MemberExpr *DictLiteralKeyME =
2881 MemberExpr::CreateImplicit(*Context, NSKeyCallExpr, false, ARRFD,
2882 ARRFD->getType(), VK_LValue, OK_Ordinary);
2883
2884 CStyleCastExpr * DictKeyObjects =
2885 NoTypeInfoCStyleCastExpr(Context,
2886 Context->getPointerType(ConstIdT),
2887 CK_BitCast,
2888 DictLiteralKeyME);
2889
2890 // Synthesize a call to objc_msgSend().
2891 SmallVector<Expr*, 32> MsgExprs;
2892 SmallVector<Expr*, 4> ClsExprs;
2893 QualType expType = Exp->getType();
2894
2895 // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2896 ObjCInterfaceDecl *Class =
2897 expType->getPointeeType()->getAs<ObjCObjectType>()->getInterface();
2898
2899 IdentifierInfo *clsName = Class->getIdentifier();
2900 ClsExprs.push_back(getStringLiteral(clsName->getName()));
2901 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2902 StartLoc, EndLoc);
2903 MsgExprs.push_back(Cls);
2904
2905 // Create a call to sel_registerName("arrayWithObjects:count:").
2906 // it will be the 2nd argument.
2907 SmallVector<Expr*, 4> SelExprs;
2908 ObjCMethodDecl *DictMethod = Exp->getDictWithObjectsMethod();
2909 SelExprs.push_back(getStringLiteral(DictMethod->getSelector().getAsString()));
2910 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2911 SelExprs, StartLoc, EndLoc);
2912 MsgExprs.push_back(SelExp);
2913
2914 // (const id [])objects
2915 MsgExprs.push_back(DictValueObjects);
2916
2917 // (const id <NSCopying> [])keys
2918 MsgExprs.push_back(DictKeyObjects);
2919
2920 // (NSUInteger)cnt
2921 Expr *cnt = IntegerLiteral::Create(*Context,
2922 llvm::APInt(UnsignedIntSize, NumElements),
2923 Context->UnsignedIntTy, SourceLocation());
2924 MsgExprs.push_back(cnt);
2925
2926 SmallVector<QualType, 8> ArgTypes;
2927 ArgTypes.push_back(Context->getObjCClassType());
2928 ArgTypes.push_back(Context->getObjCSelType());
2929 for (const auto *PI : DictMethod->parameters()) {
2930 QualType T = PI->getType();
2931 if (const PointerType* PT = T->getAs<PointerType>()) {
2932 QualType PointeeTy = PT->getPointeeType();
2933 convertToUnqualifiedObjCType(PointeeTy);
2934 T = Context->getPointerType(PointeeTy);
2935 }
2936 ArgTypes.push_back(T);
2937 }
2938
2939 QualType returnType = Exp->getType();
2940 // Get the type, we will need to reference it in a couple spots.
2941 QualType msgSendType = MsgSendFlavor->getType();
2942
2943 // Create a reference to the objc_msgSend() declaration.
2944 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2945 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2946
2947 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2948 Context, Context->getPointerType(Context->VoidTy), CK_BitCast, DRE);
2949
2950 // Now do the "normal" pointer to function cast.
2951 QualType castType =
2952 getSimpleFunctionType(returnType, ArgTypes, DictMethod->isVariadic());
2953 castType = Context->getPointerType(castType);
2954 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2955 cast);
2956
2957 // Don't forget the parens to enforce the proper binding.
2958 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2959
2960 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2961 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2962 VK_RValue, EndLoc);
2963 ReplaceStmt(Exp, CE);
2964 return CE;
2965}
2966
2967// struct __rw_objc_super {
2968// struct objc_object *object; struct objc_object *superClass;
2969// };
2970QualType RewriteModernObjC::getSuperStructType() {
2971 if (!SuperStructDecl) {
2972 SuperStructDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2973 SourceLocation(), SourceLocation(),
2974 &Context->Idents.get("__rw_objc_super"));
2975 QualType FieldTypes[2];
2976
2977 // struct objc_object *object;
2978 FieldTypes[0] = Context->getObjCIdType();
2979 // struct objc_object *superClass;
2980 FieldTypes[1] = Context->getObjCIdType();
2981
2982 // Create fields
2983 for (unsigned i = 0; i < 2; ++i) {
2984 SuperStructDecl->addDecl(FieldDecl::Create(*Context, SuperStructDecl,
2985 SourceLocation(),
2986 SourceLocation(), nullptr,
2987 FieldTypes[i], nullptr,
2988 /*BitWidth=*/nullptr,
2989 /*Mutable=*/false,
2990 ICIS_NoInit));
2991 }
2992
2993 SuperStructDecl->completeDefinition();
2994 }
2995 return Context->getTagDeclType(SuperStructDecl);
2996}
2997
2998QualType RewriteModernObjC::getConstantStringStructType() {
2999 if (!ConstantStringDecl) {
3000 ConstantStringDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
3001 SourceLocation(), SourceLocation(),
3002 &Context->Idents.get("__NSConstantStringImpl"));
3003 QualType FieldTypes[4];
3004
3005 // struct objc_object *receiver;
3006 FieldTypes[0] = Context->getObjCIdType();
3007 // int flags;
3008 FieldTypes[1] = Context->IntTy;
3009 // char *str;
3010 FieldTypes[2] = Context->getPointerType(Context->CharTy);
3011 // long length;
3012 FieldTypes[3] = Context->LongTy;
3013
3014 // Create fields
3015 for (unsigned i = 0; i < 4; ++i) {
3016 ConstantStringDecl->addDecl(FieldDecl::Create(*Context,
3017 ConstantStringDecl,
3018 SourceLocation(),
3019 SourceLocation(), nullptr,
3020 FieldTypes[i], nullptr,
3021 /*BitWidth=*/nullptr,
3022 /*Mutable=*/true,
3023 ICIS_NoInit));
3024 }
3025
3026 ConstantStringDecl->completeDefinition();
3027 }
3028 return Context->getTagDeclType(ConstantStringDecl);
3029}
3030
3031/// getFunctionSourceLocation - returns start location of a function
3032/// definition. Complication arises when function has declared as
3033/// extern "C" or extern "C" {...}
3034static SourceLocation getFunctionSourceLocation (RewriteModernObjC &R,
3035 FunctionDecl *FD) {
3036 if (FD->isExternC() && !FD->isMain()) {
3037 const DeclContext *DC = FD->getDeclContext();
3038 if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(DC))
3039 // if it is extern "C" {...}, return function decl's own location.
3040 if (!LSD->getRBraceLoc().isValid())
3041 return LSD->getExternLoc();
3042 }
3043 if (FD->getStorageClass() != SC_None)
3044 R.RewriteBlockLiteralFunctionDecl(FD);
3045 return FD->getTypeSpecStartLoc();
3046}
3047
3048void RewriteModernObjC::RewriteLineDirective(const Decl *D) {
3049
3050 SourceLocation Location = D->getLocation();
3051
3052 if (Location.isFileID() && GenerateLineInfo) {
3053 std::string LineString("\n#line ");
3054 PresumedLoc PLoc = SM->getPresumedLoc(Location);
3055 LineString += utostr(PLoc.getLine());
3056 LineString += " \"";
3057 LineString += Lexer::Stringify(PLoc.getFilename());
3058 if (isa<ObjCMethodDecl>(D))
3059 LineString += "\"";
3060 else LineString += "\"\n";
3061
3062 Location = D->getBeginLoc();
3063 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
3064 if (FD->isExternC() && !FD->isMain()) {
3065 const DeclContext *DC = FD->getDeclContext();
3066 if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(DC))
3067 // if it is extern "C" {...}, return function decl's own location.
3068 if (!LSD->getRBraceLoc().isValid())
3069 Location = LSD->getExternLoc();
3070 }
3071 }
3072 InsertText(Location, LineString);
3073 }
3074}
3075
3076/// SynthMsgSendStretCallExpr - This routine translates message expression
3077/// into a call to objc_msgSend_stret() entry point. Tricky part is that
3078/// nil check on receiver must be performed before calling objc_msgSend_stret.
3079/// MsgSendStretFlavor - function declaration objc_msgSend_stret(...)
3080/// msgSendType - function type of objc_msgSend_stret(...)
3081/// returnType - Result type of the method being synthesized.
3082/// ArgTypes - type of the arguments passed to objc_msgSend_stret, starting with receiver type.
3083/// MsgExprs - list of argument expressions being passed to objc_msgSend_stret,
3084/// starting with receiver.
3085/// Method - Method being rewritten.
3086Expr *RewriteModernObjC::SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
3087 QualType returnType,
3088 SmallVectorImpl<QualType> &ArgTypes,
3089 SmallVectorImpl<Expr*> &MsgExprs,
3090 ObjCMethodDecl *Method) {
3091 // Now do the "normal" pointer to function cast.
3092 QualType FuncType = getSimpleFunctionType(
3093 returnType, ArgTypes, Method ? Method->isVariadic() : false);
3094 QualType castType = Context->getPointerType(FuncType);
3095
3096 // build type for containing the objc_msgSend_stret object.
3097 static unsigned stretCount=0;
3098 std::string name = "__Stret"; name += utostr(stretCount);
3099 std::string str =
3100 "extern \"C\" void * __cdecl memset(void *_Dst, int _Val, size_t _Size);\n";
3101 str += "namespace {\n";
3102 str += "struct "; str += name;
3103 str += " {\n\t";
3104 str += name;
3105 str += "(id receiver, SEL sel";
3106 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3107 std::string ArgName = "arg"; ArgName += utostr(i);
3108 ArgTypes[i].getAsStringInternal(ArgName, Context->getPrintingPolicy());
3109 str += ", "; str += ArgName;
3110 }
3111 // could be vararg.
3112 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3113 std::string ArgName = "arg"; ArgName += utostr(i);
3114 MsgExprs[i]->getType().getAsStringInternal(ArgName,
3115 Context->getPrintingPolicy());
3116 str += ", "; str += ArgName;
3117 }
3118
3119 str += ") {\n";
3120 str += "\t unsigned size = sizeof(";
3121 str += returnType.getAsString(Context->getPrintingPolicy()); str += ");\n";
3122
3123 str += "\t if (size == 1 || size == 2 || size == 4 || size == 8)\n";
3124
3125 str += "\t s = (("; str += castType.getAsString(Context->getPrintingPolicy());
3126 str += ")(void *)objc_msgSend)(receiver, sel";
3127 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3128 str += ", arg"; str += utostr(i);
3129 }
3130 // could be vararg.
3131 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3132 str += ", arg"; str += utostr(i);
3133 }
3134 str+= ");\n";
3135
3136 str += "\t else if (receiver == 0)\n";
3137 str += "\t memset((void*)&s, 0, sizeof(s));\n";
3138 str += "\t else\n";
3139
3140 str += "\t s = (("; str += castType.getAsString(Context->getPrintingPolicy());
3141 str += ")(void *)objc_msgSend_stret)(receiver, sel";
3142 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3143 str += ", arg"; str += utostr(i);
3144 }
3145 // could be vararg.
3146 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3147 str += ", arg"; str += utostr(i);
3148 }
3149 str += ");\n";
3150
3151 str += "\t}\n";
3152 str += "\t"; str += returnType.getAsString(Context->getPrintingPolicy());
3153 str += " s;\n";
3154 str += "};\n};\n\n";
3155 SourceLocation FunLocStart;
3156 if (CurFunctionDef)
3157 FunLocStart = getFunctionSourceLocation(*this, CurFunctionDef);
3158 else {
3159 assert(CurMethodDef && "SynthMsgSendStretCallExpr - CurMethodDef is null")((CurMethodDef && "SynthMsgSendStretCallExpr - CurMethodDef is null"
) ? static_cast<void> (0) : __assert_fail ("CurMethodDef && \"SynthMsgSendStretCallExpr - CurMethodDef is null\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3159, __PRETTY_FUNCTION__))
;
3160 FunLocStart = CurMethodDef->getBeginLoc();
3161 }
3162
3163 InsertText(FunLocStart, str);
3164 ++stretCount;
3165
3166 // AST for __Stretn(receiver, args).s;
3167 IdentifierInfo *ID = &Context->Idents.get(name);
3168 FunctionDecl *FD =
3169 FunctionDecl::Create(*Context, TUDecl, SourceLocation(), SourceLocation(),
3170 ID, FuncType, nullptr, SC_Extern, false, false);
3171 DeclRefExpr *DRE = new (Context)
3172 DeclRefExpr(*Context, FD, false, castType, VK_RValue, SourceLocation());
3173 CallExpr *STCE = CallExpr::Create(*Context, DRE, MsgExprs, castType,
3174 VK_LValue, SourceLocation());
3175
3176 FieldDecl *FieldD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
3177 SourceLocation(),
3178 &Context->Idents.get("s"),
3179 returnType, nullptr,
3180 /*BitWidth=*/nullptr,
3181 /*Mutable=*/true, ICIS_NoInit);
3182 MemberExpr *ME = MemberExpr::CreateImplicit(
3183 *Context, STCE, false, FieldD, FieldD->getType(), VK_LValue, OK_Ordinary);
3184
3185 return ME;
3186}
3187
3188Stmt *RewriteModernObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
3189 SourceLocation StartLoc,
3190 SourceLocation EndLoc) {
3191 if (!SelGetUidFunctionDecl)
3192 SynthSelGetUidFunctionDecl();
3193 if (!MsgSendFunctionDecl)
3194 SynthMsgSendFunctionDecl();
3195 if (!MsgSendSuperFunctionDecl)
3196 SynthMsgSendSuperFunctionDecl();
3197 if (!MsgSendStretFunctionDecl)
3198 SynthMsgSendStretFunctionDecl();
3199 if (!MsgSendSuperStretFunctionDecl)
3200 SynthMsgSendSuperStretFunctionDecl();
3201 if (!MsgSendFpretFunctionDecl)
3202 SynthMsgSendFpretFunctionDecl();
3203 if (!GetClassFunctionDecl)
3204 SynthGetClassFunctionDecl();
3205 if (!GetSuperClassFunctionDecl)
3206 SynthGetSuperClassFunctionDecl();
3207 if (!GetMetaClassFunctionDecl)
3208 SynthGetMetaClassFunctionDecl();
3209
3210 // default to objc_msgSend().
3211 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
3212 // May need to use objc_msgSend_stret() as well.
3213 FunctionDecl *MsgSendStretFlavor = nullptr;
3214 if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
3215 QualType resultType = mDecl->getReturnType();
3216 if (resultType->isRecordType())
3217 MsgSendStretFlavor = MsgSendStretFunctionDecl;
3218 else if (resultType->isRealFloatingType())
3219 MsgSendFlavor = MsgSendFpretFunctionDecl;
3220 }
3221
3222 // Synthesize a call to objc_msgSend().
3223 SmallVector<Expr*, 8> MsgExprs;
3224 switch (Exp->getReceiverKind()) {
3225 case ObjCMessageExpr::SuperClass: {
3226 MsgSendFlavor = MsgSendSuperFunctionDecl;
3227 if (MsgSendStretFlavor)
3228 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3229 assert(MsgSendFlavor && "MsgSendFlavor is NULL!")((MsgSendFlavor && "MsgSendFlavor is NULL!") ? static_cast
<void> (0) : __assert_fail ("MsgSendFlavor && \"MsgSendFlavor is NULL!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3229, __PRETTY_FUNCTION__))
;
3230
3231 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3232
3233 SmallVector<Expr*, 4> InitExprs;
3234
3235 // set the receiver to self, the first argument to all methods.
3236 InitExprs.push_back(
3237 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3238 CK_BitCast,
3239 new (Context) DeclRefExpr(*Context,
3240 CurMethodDef->getSelfDecl(),
3241 false,
3242 Context->getObjCIdType(),
3243 VK_RValue,
3244 SourceLocation()))
3245 ); // set the 'receiver'.
3246
3247 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3248 SmallVector<Expr*, 8> ClsExprs;
3249 ClsExprs.push_back(getStringLiteral(ClassDecl->getIdentifier()->getName()));
3250 // (Class)objc_getClass("CurrentClass")
3251 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetMetaClassFunctionDecl,
3252 ClsExprs, StartLoc, EndLoc);
3253 ClsExprs.clear();
3254 ClsExprs.push_back(Cls);
3255 Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl, ClsExprs,
3256 StartLoc, EndLoc);
3257
3258 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3259 // To turn off a warning, type-cast to 'id'
3260 InitExprs.push_back( // set 'super class', using class_getSuperclass().
3261 NoTypeInfoCStyleCastExpr(Context,
3262 Context->getObjCIdType(),
3263 CK_BitCast, Cls));
3264 // struct __rw_objc_super
3265 QualType superType = getSuperStructType();
3266 Expr *SuperRep;
3267
3268 if (LangOpts.MicrosoftExt) {
3269 SynthSuperConstructorFunctionDecl();
3270 // Simulate a constructor call...
3271 DeclRefExpr *DRE = new (Context)
3272 DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
3273 VK_LValue, SourceLocation());
3274 SuperRep = CallExpr::Create(*Context, DRE, InitExprs, superType,
3275 VK_LValue, SourceLocation());
3276 // The code for super is a little tricky to prevent collision with
3277 // the structure definition in the header. The rewriter has it's own
3278 // internal definition (__rw_objc_super) that is uses. This is why
3279 // we need the cast below. For example:
3280 // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3281 //
3282 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3283 Context->getPointerType(SuperRep->getType()),
3284 VK_RValue, OK_Ordinary,
3285 SourceLocation(), false);
3286 SuperRep = NoTypeInfoCStyleCastExpr(Context,
3287 Context->getPointerType(superType),
3288 CK_BitCast, SuperRep);
3289 } else {
3290 // (struct __rw_objc_super) { <exprs from above> }
3291 InitListExpr *ILE =
3292 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3293 SourceLocation());
3294 TypeSourceInfo *superTInfo
3295 = Context->getTrivialTypeSourceInfo(superType);
3296 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
3297 superType, VK_LValue,
3298 ILE, false);
3299 // struct __rw_objc_super *
3300 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3301 Context->getPointerType(SuperRep->getType()),
3302 VK_RValue, OK_Ordinary,
3303 SourceLocation(), false);
3304 }
3305 MsgExprs.push_back(SuperRep);
3306 break;
3307 }
3308
3309 case ObjCMessageExpr::Class: {
3310 SmallVector<Expr*, 8> ClsExprs;
3311 ObjCInterfaceDecl *Class
3312 = Exp->getClassReceiver()->getAs<ObjCObjectType>()->getInterface();
3313 IdentifierInfo *clsName = Class->getIdentifier();
3314 ClsExprs.push_back(getStringLiteral(clsName->getName()));
3315 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
3316 StartLoc, EndLoc);
3317 CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
3318 Context->getObjCIdType(),
3319 CK_BitCast, Cls);
3320 MsgExprs.push_back(ArgExpr);
3321 break;
3322 }
3323
3324 case ObjCMessageExpr::SuperInstance:{
3325 MsgSendFlavor = MsgSendSuperFunctionDecl;
3326 if (MsgSendStretFlavor)
3327 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3328 assert(MsgSendFlavor && "MsgSendFlavor is NULL!")((MsgSendFlavor && "MsgSendFlavor is NULL!") ? static_cast
<void> (0) : __assert_fail ("MsgSendFlavor && \"MsgSendFlavor is NULL!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3328, __PRETTY_FUNCTION__))
;
3329 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3330 SmallVector<Expr*, 4> InitExprs;
3331
3332 InitExprs.push_back(
3333 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3334 CK_BitCast,
3335 new (Context) DeclRefExpr(*Context,
3336 CurMethodDef->getSelfDecl(),
3337 false,
3338 Context->getObjCIdType(),
3339 VK_RValue, SourceLocation()))
3340 ); // set the 'receiver'.
3341
3342 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3343 SmallVector<Expr*, 8> ClsExprs;
3344 ClsExprs.push_back(getStringLiteral(ClassDecl->getIdentifier()->getName()));
3345 // (Class)objc_getClass("CurrentClass")
3346 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
3347 StartLoc, EndLoc);
3348 ClsExprs.clear();
3349 ClsExprs.push_back(Cls);
3350 Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl, ClsExprs,
3351 StartLoc, EndLoc);
3352
3353 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3354 // To turn off a warning, type-cast to 'id'
3355 InitExprs.push_back(
3356 // set 'super class', using class_getSuperclass().
3357 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3358 CK_BitCast, Cls));
3359 // struct __rw_objc_super
3360 QualType superType = getSuperStructType();
3361 Expr *SuperRep;
3362
3363 if (LangOpts.MicrosoftExt) {
3364 SynthSuperConstructorFunctionDecl();
3365 // Simulate a constructor call...
3366 DeclRefExpr *DRE = new (Context)
3367 DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
3368 VK_LValue, SourceLocation());
3369 SuperRep = CallExpr::Create(*Context, DRE, InitExprs, superType,
3370 VK_LValue, SourceLocation());
3371 // The code for super is a little tricky to prevent collision with
3372 // the structure definition in the header. The rewriter has it's own
3373 // internal definition (__rw_objc_super) that is uses. This is why
3374 // we need the cast below. For example:
3375 // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3376 //
3377 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3378 Context->getPointerType(SuperRep->getType()),
3379 VK_RValue, OK_Ordinary,
3380 SourceLocation(), false);
3381 SuperRep = NoTypeInfoCStyleCastExpr(Context,
3382 Context->getPointerType(superType),
3383 CK_BitCast, SuperRep);
3384 } else {
3385 // (struct __rw_objc_super) { <exprs from above> }
3386 InitListExpr *ILE =
3387 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3388 SourceLocation());
3389 TypeSourceInfo *superTInfo
3390 = Context->getTrivialTypeSourceInfo(superType);
3391 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
3392 superType, VK_RValue, ILE,
3393 false);
3394 }
3395 MsgExprs.push_back(SuperRep);
3396 break;
3397 }
3398
3399 case ObjCMessageExpr::Instance: {
3400 // Remove all type-casts because it may contain objc-style types; e.g.
3401 // Foo<Proto> *.
3402 Expr *recExpr = Exp->getInstanceReceiver();
3403 while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(recExpr))
3404 recExpr = CE->getSubExpr();
3405 CastKind CK = recExpr->getType()->isObjCObjectPointerType()
3406 ? CK_BitCast : recExpr->getType()->isBlockPointerType()
3407 ? CK_BlockPointerToObjCPointerCast
3408 : CK_CPointerToObjCPointerCast;
3409
3410 recExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3411 CK, recExpr);
3412 MsgExprs.push_back(recExpr);
3413 break;
3414 }
3415 }
3416
3417 // Create a call to sel_registerName("selName"), it will be the 2nd argument.
3418 SmallVector<Expr*, 8> SelExprs;
3419 SelExprs.push_back(getStringLiteral(Exp->getSelector().getAsString()));
3420 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
3421 SelExprs, StartLoc, EndLoc);
3422 MsgExprs.push_back(SelExp);
3423
3424 // Now push any user supplied arguments.
3425 for (unsigned i = 0; i < Exp->getNumArgs(); i++) {
3426 Expr *userExpr = Exp->getArg(i);
3427 // Make all implicit casts explicit...ICE comes in handy:-)
3428 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) {
3429 // Reuse the ICE type, it is exactly what the doctor ordered.
3430 QualType type = ICE->getType();
3431 if (needToScanForQualifiers(type))
3432 type = Context->getObjCIdType();
3433 // Make sure we convert "type (^)(...)" to "type (*)(...)".
3434 (void)convertBlockPointerToFunctionPointer(type);
3435 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
3436 CastKind CK;
3437 if (SubExpr->getType()->isIntegralType(*Context) &&
3438 type->isBooleanType()) {
3439 CK = CK_IntegralToBoolean;
3440 } else if (type->isObjCObjectPointerType()) {
3441 if (SubExpr->getType()->isBlockPointerType()) {
3442 CK = CK_BlockPointerToObjCPointerCast;
3443 } else if (SubExpr->getType()->isPointerType()) {
3444 CK = CK_CPointerToObjCPointerCast;
3445 } else {
3446 CK = CK_BitCast;
3447 }
3448 } else {
3449 CK = CK_BitCast;
3450 }
3451
3452 userExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, userExpr);
3453 }
3454 // Make id<P...> cast into an 'id' cast.
3455 else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(userExpr)) {
3456 if (CE->getType()->isObjCQualifiedIdType()) {
3457 while ((CE = dyn_cast<CStyleCastExpr>(userExpr)))
3458 userExpr = CE->getSubExpr();
3459 CastKind CK;
3460 if (userExpr->getType()->isIntegralType(*Context)) {
3461 CK = CK_IntegralToPointer;
3462 } else if (userExpr->getType()->isBlockPointerType()) {
3463 CK = CK_BlockPointerToObjCPointerCast;
3464 } else if (userExpr->getType()->isPointerType()) {
3465 CK = CK_CPointerToObjCPointerCast;
3466 } else {
3467 CK = CK_BitCast;
3468 }
3469 userExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3470 CK, userExpr);
3471 }
3472 }
3473 MsgExprs.push_back(userExpr);
3474 // We've transferred the ownership to MsgExprs. For now, we *don't* null
3475 // out the argument in the original expression (since we aren't deleting
3476 // the ObjCMessageExpr). See RewritePropertyOrImplicitSetter() usage for more info.
3477 //Exp->setArg(i, 0);
3478 }
3479 // Generate the funky cast.
3480 CastExpr *cast;
3481 SmallVector<QualType, 8> ArgTypes;
3482 QualType returnType;
3483
3484 // Push 'id' and 'SEL', the 2 implicit arguments.
3485 if (MsgSendFlavor == MsgSendSuperFunctionDecl)
3486 ArgTypes.push_back(Context->getPointerType(getSuperStructType()));
3487 else
3488 ArgTypes.push_back(Context->getObjCIdType());
3489 ArgTypes.push_back(Context->getObjCSelType());
3490 if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
3491 // Push any user argument types.
3492 for (const auto *PI : OMD->parameters()) {
3493 QualType t = PI->getType()->isObjCQualifiedIdType()
3494 ? Context->getObjCIdType()
3495 : PI->getType();
3496 // Make sure we convert "t (^)(...)" to "t (*)(...)".
3497 (void)convertBlockPointerToFunctionPointer(t);
3498 ArgTypes.push_back(t);
3499 }
3500 returnType = Exp->getType();
3501 convertToUnqualifiedObjCType(returnType);
3502 (void)convertBlockPointerToFunctionPointer(returnType);
3503 } else {
3504 returnType = Context->getObjCIdType();
3505 }
3506 // Get the type, we will need to reference it in a couple spots.
3507 QualType msgSendType = MsgSendFlavor->getType();
3508
3509 // Create a reference to the objc_msgSend() declaration.
3510 DeclRefExpr *DRE = new (Context) DeclRefExpr(
3511 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
3512
3513 // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
3514 // If we don't do this cast, we get the following bizarre warning/note:
3515 // xx.m:13: warning: function called through a non-compatible type
3516 // xx.m:13: note: if this code is reached, the program will abort
3517 cast = NoTypeInfoCStyleCastExpr(Context,
3518 Context->getPointerType(Context->VoidTy),
3519 CK_BitCast, DRE);
3520
3521 // Now do the "normal" pointer to function cast.
3522 // If we don't have a method decl, force a variadic cast.
3523 const ObjCMethodDecl *MD = Exp->getMethodDecl();
3524 QualType castType =
3525 getSimpleFunctionType(returnType, ArgTypes, MD ? MD->isVariadic() : true);
3526 castType = Context->getPointerType(castType);
3527 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
3528 cast);
3529
3530 // Don't forget the parens to enforce the proper binding.
3531 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
3532
3533 const FunctionType *FT = msgSendType->getAs<FunctionType>();
3534 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
3535 VK_RValue, EndLoc);
3536 Stmt *ReplacingStmt = CE;
3537 if (MsgSendStretFlavor) {
3538 // We have the method which returns a struct/union. Must also generate
3539 // call to objc_msgSend_stret and hang both varieties on a conditional
3540 // expression which dictate which one to envoke depending on size of
3541 // method's return type.
3542
3543 Expr *STCE = SynthMsgSendStretCallExpr(MsgSendStretFlavor,
3544 returnType,
3545 ArgTypes, MsgExprs,
3546 Exp->getMethodDecl());
3547 ReplacingStmt = STCE;
3548 }
3549 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3550 return ReplacingStmt;
3551}
3552
3553Stmt *RewriteModernObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
3554 Stmt *ReplacingStmt =
3555 SynthMessageExpr(Exp, Exp->getBeginLoc(), Exp->getEndLoc());
3556
3557 // Now do the actual rewrite.
3558 ReplaceStmt(Exp, ReplacingStmt);
3559
3560 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3561 return ReplacingStmt;
3562}
3563
3564// typedef struct objc_object Protocol;
3565QualType RewriteModernObjC::getProtocolType() {
3566 if (!ProtocolTypeDecl) {
3567 TypeSourceInfo *TInfo
3568 = Context->getTrivialTypeSourceInfo(Context->getObjCIdType());
3569 ProtocolTypeDecl = TypedefDecl::Create(*Context, TUDecl,
3570 SourceLocation(), SourceLocation(),
3571 &Context->Idents.get("Protocol"),
3572 TInfo);
3573 }
3574 return Context->getTypeDeclType(ProtocolTypeDecl);
3575}
3576
3577/// RewriteObjCProtocolExpr - Rewrite a protocol expression into
3578/// a synthesized/forward data reference (to the protocol's metadata).
3579/// The forward references (and metadata) are generated in
3580/// RewriteModernObjC::HandleTranslationUnit().
3581Stmt *RewriteModernObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
3582 std::string Name = "_OBJC_PROTOCOL_REFERENCE_$_" +
3583 Exp->getProtocol()->getNameAsString();
3584 IdentifierInfo *ID = &Context->Idents.get(Name);
3585 VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
3586 SourceLocation(), ID, getProtocolType(),
3587 nullptr, SC_Extern);
3588 DeclRefExpr *DRE = new (Context) DeclRefExpr(
3589 *Context, VD, false, getProtocolType(), VK_LValue, SourceLocation());
3590 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(
3591 Context, Context->getPointerType(DRE->getType()), CK_BitCast, DRE);
3592 ReplaceStmt(Exp, castExpr);
3593 ProtocolExprDecls.insert(Exp->getProtocol()->getCanonicalDecl());
3594 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3595 return castExpr;
3596}
3597
3598/// IsTagDefinedInsideClass - This routine checks that a named tagged type
3599/// is defined inside an objective-c class. If so, it returns true.
3600bool RewriteModernObjC::IsTagDefinedInsideClass(ObjCContainerDecl *IDecl,
3601 TagDecl *Tag,
3602 bool &IsNamedDefinition) {
3603 if (!IDecl)
3604 return false;
3605 SourceLocation TagLocation;
3606 if (RecordDecl *RD = dyn_cast<RecordDecl>(Tag)) {
3607 RD = RD->getDefinition();
3608 if (!RD || !RD->getDeclName().getAsIdentifierInfo())
3609 return false;
3610 IsNamedDefinition = true;
3611 TagLocation = RD->getLocation();
3612 return Context->getSourceManager().isBeforeInTranslationUnit(
3613 IDecl->getLocation(), TagLocation);
3614 }
3615 if (EnumDecl *ED = dyn_cast<EnumDecl>(Tag)) {
3616 if (!ED || !ED->getDeclName().getAsIdentifierInfo())
3617 return false;
3618 IsNamedDefinition = true;
3619 TagLocation = ED->getLocation();
3620 return Context->getSourceManager().isBeforeInTranslationUnit(
3621 IDecl->getLocation(), TagLocation);
3622 }
3623 return false;
3624}
3625
3626/// RewriteObjCFieldDeclType - This routine rewrites a type into the buffer.
3627/// It handles elaborated types, as well as enum types in the process.
3628bool RewriteModernObjC::RewriteObjCFieldDeclType(QualType &Type,
3629 std::string &Result) {
3630 if (isa<TypedefType>(Type)) {
3631 Result += "\t";
3632 return false;
3633 }
3634
3635 if (Type->isArrayType()) {
3636 QualType ElemTy = Context->getBaseElementType(Type);
3637 return RewriteObjCFieldDeclType(ElemTy, Result);
3638 }
3639 else if (Type->isRecordType()) {
3640 RecordDecl *RD = Type->getAs<RecordType>()->getDecl();
3641 if (RD->isCompleteDefinition()) {
3642 if (RD->isStruct())
3643 Result += "\n\tstruct ";
3644 else if (RD->isUnion())
3645 Result += "\n\tunion ";
3646 else
3647 assert(false && "class not allowed as an ivar type")((false && "class not allowed as an ivar type") ? static_cast
<void> (0) : __assert_fail ("false && \"class not allowed as an ivar type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3647, __PRETTY_FUNCTION__))
;
3648
3649 Result += RD->getName();
3650 if (GlobalDefinedTags.count(RD)) {
3651 // struct/union is defined globally, use it.
3652 Result += " ";
3653 return true;
3654 }
3655 Result += " {\n";
3656 for (auto *FD : RD->fields())
3657 RewriteObjCFieldDecl(FD, Result);
3658 Result += "\t} ";
3659 return true;
3660 }
3661 }
3662 else if (Type->isEnumeralType()) {
3663 EnumDecl *ED = Type->getAs<EnumType>()->getDecl();
3664 if (ED->isCompleteDefinition()) {
3665 Result += "\n\tenum ";
3666 Result += ED->getName();
3667 if (GlobalDefinedTags.count(ED)) {
3668 // Enum is globall defined, use it.
3669 Result += " ";
3670 return true;
3671 }
3672
3673 Result += " {\n";
3674 for (const auto *EC : ED->enumerators()) {
3675 Result += "\t"; Result += EC->getName(); Result += " = ";
3676 llvm::APSInt Val = EC->getInitVal();
3677 Result += Val.toString(10);
3678 Result += ",\n";
3679 }
3680 Result += "\t} ";
3681 return true;
3682 }
3683 }
3684
3685 Result += "\t";
3686 convertObjCTypeToCStyleType(Type);
3687 return false;
3688}
3689
3690
3691/// RewriteObjCFieldDecl - This routine rewrites a field into the buffer.
3692/// It handles elaborated types, as well as enum types in the process.
3693void RewriteModernObjC::RewriteObjCFieldDecl(FieldDecl *fieldDecl,
3694 std::string &Result) {
3695 QualType Type = fieldDecl->getType();
3696 std::string Name = fieldDecl->getNameAsString();
3697
3698 bool EleboratedType = RewriteObjCFieldDeclType(Type, Result);
3699 if (!EleboratedType)
3700 Type.getAsStringInternal(Name, Context->getPrintingPolicy());
3701 Result += Name;
3702 if (fieldDecl->isBitField()) {
3703 Result += " : "; Result += utostr(fieldDecl->getBitWidthValue(*Context));
3704 }
3705 else if (EleboratedType && Type->isArrayType()) {
3706 const ArrayType *AT = Context->getAsArrayType(Type);
3707 do {
3708 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) {
3709 Result += "[";
3710 llvm::APInt Dim = CAT->getSize();
3711 Result += utostr(Dim.getZExtValue());
3712 Result += "]";
3713 }
3714 AT = Context->getAsArrayType(AT->getElementType());
3715 } while (AT);
3716 }
3717
3718 Result += ";\n";
3719}
3720
3721/// RewriteLocallyDefinedNamedAggregates - This routine rewrites locally defined
3722/// named aggregate types into the input buffer.
3723void RewriteModernObjC::RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
3724 std::string &Result) {
3725 QualType Type = fieldDecl->getType();
3726 if (isa<TypedefType>(Type))
30
Assuming 'Type' is not a 'TypedefType'
31
Taking false branch
3727 return;
3728 if (Type->isArrayType())
32
Taking false branch
3729 Type = Context->getBaseElementType(Type);
3730 ObjCContainerDecl *IDecl =
3731 dyn_cast<ObjCContainerDecl>(fieldDecl->getDeclContext());
33
Assuming the object is not a 'ObjCContainerDecl'
3732
3733 TagDecl *TD = nullptr;
3734 if (Type->isRecordType()) {
34
Calling 'Type::isRecordType'
37
Returning from 'Type::isRecordType'
38
Taking false branch
3735 TD = Type->getAs<RecordType>()->getDecl();
3736 }
3737 else if (Type->isEnumeralType()) {
39
Calling 'Type::isEnumeralType'
42
Returning from 'Type::isEnumeralType'
43
Taking true branch
3738 TD = Type->getAs<EnumType>()->getDecl();
44
Assuming the object is not a 'EnumType'
45
Called C++ object pointer is null
3739 }
3740
3741 if (TD) {
3742 if (GlobalDefinedTags.count(TD))
3743 return;
3744
3745 bool IsNamedDefinition = false;
3746 if (IsTagDefinedInsideClass(IDecl, TD, IsNamedDefinition)) {
3747 RewriteObjCFieldDeclType(Type, Result);
3748 Result += ";";
3749 }
3750 if (IsNamedDefinition)
3751 GlobalDefinedTags.insert(TD);
3752 }
3753}
3754
3755unsigned RewriteModernObjC::ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV) {
3756 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3757 if (ObjCInterefaceHasBitfieldGroups.count(CDecl)) {
3758 return IvarGroupNumber[IV];
3759 }
3760 unsigned GroupNo = 0;
3761 SmallVector<const ObjCIvarDecl *, 8> IVars;
3762 for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3763 IVD; IVD = IVD->getNextIvar())
3764 IVars.push_back(IVD);
3765
3766 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3767 if (IVars[i]->isBitField()) {
3768 IvarGroupNumber[IVars[i++]] = ++GroupNo;
3769 while (i < e && IVars[i]->isBitField())
3770 IvarGroupNumber[IVars[i++]] = GroupNo;
3771 if (i < e)
3772 --i;
3773 }
3774
3775 ObjCInterefaceHasBitfieldGroups.insert(CDecl);
3776 return IvarGroupNumber[IV];
3777}
3778
3779QualType RewriteModernObjC::SynthesizeBitfieldGroupStructType(
3780 ObjCIvarDecl *IV,
3781 SmallVectorImpl<ObjCIvarDecl *> &IVars) {
3782 std::string StructTagName;
3783 ObjCIvarBitfieldGroupType(IV, StructTagName);
3784 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct,
3785 Context->getTranslationUnitDecl(),
3786 SourceLocation(), SourceLocation(),
3787 &Context->Idents.get(StructTagName));
3788 for (unsigned i=0, e = IVars.size(); i < e; i++) {
3789 ObjCIvarDecl *Ivar = IVars[i];
3790 RD->addDecl(FieldDecl::Create(*Context, RD, SourceLocation(), SourceLocation(),
3791 &Context->Idents.get(Ivar->getName()),
3792 Ivar->getType(),
3793 nullptr, /*Expr *BW */Ivar->getBitWidth(),
3794 false, ICIS_NoInit));
3795 }
3796 RD->completeDefinition();
3797 return Context->getTagDeclType(RD);
3798}
3799
3800QualType RewriteModernObjC::GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV) {
3801 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3802 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3803 std::pair<const ObjCInterfaceDecl*, unsigned> tuple = std::make_pair(CDecl, GroupNo);
3804 if (GroupRecordType.count(tuple))
3805 return GroupRecordType[tuple];
3806
3807 SmallVector<ObjCIvarDecl *, 8> IVars;
3808 for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3809 IVD; IVD = IVD->getNextIvar()) {
3810 if (IVD->isBitField())
3811 IVars.push_back(const_cast<ObjCIvarDecl *>(IVD));
3812 else {
3813 if (!IVars.empty()) {
3814 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IVars[0]);
3815 // Generate the struct type for this group of bitfield ivars.
3816 GroupRecordType[std::make_pair(CDecl, GroupNo)] =
3817 SynthesizeBitfieldGroupStructType(IVars[0], IVars);
3818 IVars.clear();
3819 }
3820 }
3821 }
3822 if (!IVars.empty()) {
3823 // Do the last one.
3824 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IVars[0]);
3825 GroupRecordType[std::make_pair(CDecl, GroupNo)] =
3826 SynthesizeBitfieldGroupStructType(IVars[0], IVars);
3827 }
3828 QualType RetQT = GroupRecordType[tuple];
3829 assert(!RetQT.isNull() && "GetGroupRecordTypeForObjCIvarBitfield struct type is NULL")((!RetQT.isNull() && "GetGroupRecordTypeForObjCIvarBitfield struct type is NULL"
) ? static_cast<void> (0) : __assert_fail ("!RetQT.isNull() && \"GetGroupRecordTypeForObjCIvarBitfield struct type is NULL\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3829, __PRETTY_FUNCTION__))
;
3830
3831 return RetQT;
3832}
3833
3834/// ObjCIvarBitfieldGroupDecl - Names field decl. for ivar bitfield group.
3835/// Name would be: classname__GRBF_n where n is the group number for this ivar.
3836void RewriteModernObjC::ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV,
3837 std::string &Result) {
3838 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3839 Result += CDecl->getName();
3840 Result += "__GRBF_";
3841 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3842 Result += utostr(GroupNo);
3843}
3844
3845/// ObjCIvarBitfieldGroupType - Names struct type for ivar bitfield group.
3846/// Name of the struct would be: classname__T_n where n is the group number for
3847/// this ivar.
3848void RewriteModernObjC::ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV,
3849 std::string &Result) {
3850 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3851 Result += CDecl->getName();
3852 Result += "__T_";
3853 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3854 Result += utostr(GroupNo);
3855}
3856
3857/// ObjCIvarBitfieldGroupOffset - Names symbol for ivar bitfield group field offset.
3858/// Name would be: OBJC_IVAR_$_classname__GRBF_n where n is the group number for
3859/// this ivar.
3860void RewriteModernObjC::ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV,
3861 std::string &Result) {
3862 Result += "OBJC_IVAR_$_";
3863 ObjCIvarBitfieldGroupDecl(IV, Result);
3864}
3865
3866#define SKIP_BITFIELDS(IX, ENDIX, VEC){ while ((IX < ENDIX) && VEC[IX]->isBitField())
++IX; if (IX < ENDIX) --IX; }
{ \
3867 while ((IX < ENDIX) && VEC[IX]->isBitField()) \
3868 ++IX; \
3869 if (IX < ENDIX) \
3870 --IX; \
3871}
3872
3873/// RewriteObjCInternalStruct - Rewrite one internal struct corresponding to
3874/// an objective-c class with ivars.
3875void RewriteModernObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
3876 std::string &Result) {
3877 assert
20.1
'CDecl' is non-null
20.1
'CDecl' is non-null
(CDecl && "Class missing in SynthesizeObjCInternalStruct")((CDecl && "Class missing in SynthesizeObjCInternalStruct"
) ? static_cast<void> (0) : __assert_fail ("CDecl && \"Class missing in SynthesizeObjCInternalStruct\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3877, __PRETTY_FUNCTION__))
;
21
'?' condition is true
3878 assert(CDecl->getName() != "" &&((CDecl->getName() != "" && "Name missing in SynthesizeObjCInternalStruct"
) ? static_cast<void> (0) : __assert_fail ("CDecl->getName() != \"\" && \"Name missing in SynthesizeObjCInternalStruct\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3879, __PRETTY_FUNCTION__))
22
'?' condition is true
3879 "Name missing in SynthesizeObjCInternalStruct")((CDecl->getName() != "" && "Name missing in SynthesizeObjCInternalStruct"
) ? static_cast<void> (0) : __assert_fail ("CDecl->getName() != \"\" && \"Name missing in SynthesizeObjCInternalStruct\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3879, __PRETTY_FUNCTION__))
;
3880 ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
3881 SmallVector<ObjCIvarDecl *, 8> IVars;
3882 for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
23
Loop condition is false. Execution continues on line 3886
3883 IVD; IVD = IVD->getNextIvar())
3884 IVars.push_back(IVD);
3885
3886 SourceLocation LocStart = CDecl->getBeginLoc();
3887 SourceLocation LocEnd = CDecl->getEndOfDefinitionLoc();
3888
3889 const char *startBuf = SM->getCharacterData(LocStart);
3890 const char *endBuf = SM->getCharacterData(LocEnd);
3891
3892 // If no ivars and no root or if its root, directly or indirectly,
3893 // have no ivars (thus not synthesized) then no need to synthesize this class.
3894 if ((!CDecl->isThisDeclarationADefinition() || IVars.size() == 0) &&
26
Taking false branch
3895 (!RCDecl || !ObjCSynthesizedStructs.count(RCDecl))) {
24
Assuming 'RCDecl' is non-null
25
Assuming the condition is false
3896 endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3897 ReplaceText(LocStart, endBuf-startBuf, Result);
3898 return;
3899 }
3900
3901 // Insert named struct/union definitions inside class to
3902 // outer scope. This follows semantics of locally defined
3903 // struct/unions in objective-c classes.
3904 for (unsigned i = 0, e = IVars.size(); i < e; i++)
27
Assuming 'i' is < 'e'
28
Loop condition is true. Entering loop body
3905 RewriteLocallyDefinedNamedAggregates(IVars[i], Result);
29
Calling 'RewriteModernObjC::RewriteLocallyDefinedNamedAggregates'
3906
3907 // Insert named structs which are syntheized to group ivar bitfields
3908 // to outer scope as well.
3909 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3910 if (IVars[i]->isBitField()) {
3911 ObjCIvarDecl *IV = IVars[i];
3912 QualType QT = GetGroupRecordTypeForObjCIvarBitfield(IV);
3913 RewriteObjCFieldDeclType(QT, Result);
3914 Result += ";";
3915 // skip over ivar bitfields in this group.
3916 SKIP_BITFIELDS(i , e, IVars){ while ((i < e) && IVars[i]->isBitField()) ++i
; if (i < e) --i; }
;
3917 }
3918
3919 Result += "\nstruct ";
3920 Result += CDecl->getNameAsString();
3921 Result += "_IMPL {\n";
3922
3923 if (RCDecl && ObjCSynthesizedStructs.count(RCDecl)) {
3924 Result += "\tstruct "; Result += RCDecl->getNameAsString();
3925 Result += "_IMPL "; Result += RCDecl->getNameAsString();
3926 Result += "_IVARS;\n";
3927 }
3928
3929 for (unsigned i = 0, e = IVars.size(); i < e; i++) {
3930 if (IVars[i]->isBitField()) {
3931 ObjCIvarDecl *IV = IVars[i];
3932 Result += "\tstruct ";
3933 ObjCIvarBitfieldGroupType(IV, Result); Result += " ";
3934 ObjCIvarBitfieldGroupDecl(IV, Result); Result += ";\n";
3935 // skip over ivar bitfields in this group.
3936 SKIP_BITFIELDS(i , e, IVars){ while ((i < e) && IVars[i]->isBitField()) ++i
; if (i < e) --i; }
;
3937 }
3938 else
3939 RewriteObjCFieldDecl(IVars[i], Result);
3940 }
3941
3942 Result += "};\n";
3943 endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3944 ReplaceText(LocStart, endBuf-startBuf, Result);
3945 // Mark this struct as having been generated.
3946 if (!ObjCSynthesizedStructs.insert(CDecl).second)
3947 llvm_unreachable("struct already synthesize- RewriteObjCInternalStruct")::llvm::llvm_unreachable_internal("struct already synthesize- RewriteObjCInternalStruct"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3947)
;
3948}
3949
3950/// RewriteIvarOffsetSymbols - Rewrite ivar offset symbols of those ivars which
3951/// have been referenced in an ivar access expression.
3952void RewriteModernObjC::RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
3953 std::string &Result) {
3954 // write out ivar offset symbols which have been referenced in an ivar
3955 // access expression.
3956 llvm::SmallSetVector<ObjCIvarDecl *, 8> Ivars = ReferencedIvars[CDecl];
3957
3958 if (Ivars.empty())
3959 return;
3960
3961 llvm::DenseSet<std::pair<const ObjCInterfaceDecl*, unsigned> > GroupSymbolOutput;
3962 for (ObjCIvarDecl *IvarDecl : Ivars) {
3963 const ObjCInterfaceDecl *IDecl = IvarDecl->getContainingInterface();
3964 unsigned GroupNo = 0;
3965 if (IvarDecl->isBitField()) {
3966 GroupNo = ObjCIvarBitfieldGroupNo(IvarDecl);
3967 if (GroupSymbolOutput.count(std::make_pair(IDecl, GroupNo)))
3968 continue;
3969 }
3970 Result += "\n";
3971 if (LangOpts.MicrosoftExt)
3972 Result += "__declspec(allocate(\".objc_ivar$B\")) ";
3973 Result += "extern \"C\" ";
3974 if (LangOpts.MicrosoftExt &&
3975 IvarDecl->getAccessControl() != ObjCIvarDecl::Private &&
3976 IvarDecl->getAccessControl() != ObjCIvarDecl::Package)
3977 Result += "__declspec(dllimport) ";
3978
3979 Result += "unsigned long ";
3980 if (IvarDecl->isBitField()) {
3981 ObjCIvarBitfieldGroupOffset(IvarDecl, Result);
3982 GroupSymbolOutput.insert(std::make_pair(IDecl, GroupNo));
3983 }
3984 else
3985 WriteInternalIvarName(CDecl, IvarDecl, Result);
3986 Result += ";";
3987 }
3988}
3989
3990//===----------------------------------------------------------------------===//
3991// Meta Data Emission
3992//===----------------------------------------------------------------------===//
3993
3994/// RewriteImplementations - This routine rewrites all method implementations
3995/// and emits meta-data.
3996
3997void RewriteModernObjC::RewriteImplementations() {
3998 int ClsDefCount = ClassImplementation.size();
3999 int CatDefCount = CategoryImplementation.size();
4000
4001 // Rewrite implemented methods
4002 for (int i = 0; i < ClsDefCount; i++) {
4003 ObjCImplementationDecl *OIMP = ClassImplementation[i];
4004 ObjCInterfaceDecl *CDecl = OIMP->getClassInterface();
4005 if (CDecl->isImplicitInterfaceDecl())
4006 assert(false &&((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4007, __PRETTY_FUNCTION__))
4007 "Legacy implicit interface rewriting not supported in moder abi")((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4007, __PRETTY_FUNCTION__))
;
4008 RewriteImplementationDecl(OIMP);
4009 }
4010
4011 for (int i = 0; i < CatDefCount; i++) {
4012 ObjCCategoryImplDecl *CIMP = CategoryImplementation[i];
4013 ObjCInterfaceDecl *CDecl = CIMP->getClassInterface();
4014 if (CDecl->isImplicitInterfaceDecl())
4015 assert(false &&((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4016, __PRETTY_FUNCTION__))
4016 "Legacy implicit interface rewriting not supported in moder abi")((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4016, __PRETTY_FUNCTION__))
;
4017 RewriteImplementationDecl(CIMP);
4018 }
4019}
4020
4021void RewriteModernObjC::RewriteByRefString(std::string &ResultStr,
4022 const std::string &Name,
4023 ValueDecl *VD, bool def) {
4024 assert(BlockByRefDeclNo.count(VD) &&((BlockByRefDeclNo.count(VD) && "RewriteByRefString: ByRef decl missing"
) ? static_cast<void> (0) : __assert_fail ("BlockByRefDeclNo.count(VD) && \"RewriteByRefString: ByRef decl missing\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4025, __PRETTY_FUNCTION__))
4025 "RewriteByRefString: ByRef decl missing")((BlockByRefDeclNo.count(VD) && "RewriteByRefString: ByRef decl missing"
) ? static_cast<void> (0) : __assert_fail ("BlockByRefDeclNo.count(VD) && \"RewriteByRefString: ByRef decl missing\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4025, __PRETTY_FUNCTION__))
;
4026 if (def)
4027 ResultStr += "struct ";
4028 ResultStr += "__Block_byref_" + Name +
4029 "_" + utostr(BlockByRefDeclNo[VD]) ;
4030}
4031
4032static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
4033 if (VarDecl *Var = dyn_cast<VarDecl>(VD))
4034 return (Var->isFunctionOrMethodVarDecl() && !Var->hasLocalStorage());
4035 return false;
4036}
4037
4038std::string RewriteModernObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
4039 StringRef funcName,
4040 std::string Tag) {
4041 const FunctionType *AFT = CE->getFunctionType();
4042 QualType RT = AFT->getReturnType();
4043 std::string StructRef = "struct " + Tag;
4044 SourceLocation BlockLoc = CE->getExprLoc();
4045 std::string S;
4046 ConvertSourceLocationToLineDirective(BlockLoc, S);
4047
4048 S += "static " + RT.getAsString(Context->getPrintingPolicy()) + " __" +
4049 funcName.str() + "_block_func_" + utostr(i);
4050
4051 BlockDecl *BD = CE->getBlockDecl();
4052
4053 if (isa<FunctionNoProtoType>(AFT)) {
4054 // No user-supplied arguments. Still need to pass in a pointer to the
4055 // block (to reference imported block decl refs).
4056 S += "(" + StructRef + " *__cself)";
4057 } else if (BD->param_empty()) {
4058 S += "(" + StructRef + " *__cself)";
4059 } else {
4060 const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
4061 assert(FT && "SynthesizeBlockFunc: No function proto")((FT && "SynthesizeBlockFunc: No function proto") ? static_cast
<void> (0) : __assert_fail ("FT && \"SynthesizeBlockFunc: No function proto\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4061, __PRETTY_FUNCTION__))
;
4062 S += '(';
4063 // first add the implicit argument.
4064 S += StructRef + " *__cself, ";
4065 std::string ParamStr;
4066 for (BlockDecl::param_iterator AI = BD->param_begin(),
4067 E = BD->param_end(); AI != E; ++AI) {
4068 if (AI != BD->param_begin()) S += ", ";
4069 ParamStr = (*AI)->getNameAsString();
4070 QualType QT = (*AI)->getType();
4071 (void)convertBlockPointerToFunctionPointer(QT);
4072 QT.getAsStringInternal(ParamStr, Context->getPrintingPolicy());
4073 S += ParamStr;
4074 }
4075 if (FT->isVariadic()) {
4076 if (!BD->param_empty()) S += ", ";
4077 S += "...";
4078 }
4079 S += ')';
4080 }
4081 S += " {\n";
4082
4083 // Create local declarations to avoid rewriting all closure decl ref exprs.
4084 // First, emit a declaration for all "by ref" decls.
4085 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4086 E = BlockByRefDecls.end(); I != E; ++I) {
4087 S += " ";
4088 std::string Name = (*I)->getNameAsString();
4089 std::string TypeString;
4090 RewriteByRefString(TypeString, Name, (*I));
4091 TypeString += " *";
4092 Name = TypeString + Name;
4093 S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
4094 }
4095 // Next, emit a declaration for all "by copy" declarations.
4096 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4097 E = BlockByCopyDecls.end(); I != E; ++I) {
4098 S += " ";
4099 // Handle nested closure invocation. For example:
4100 //
4101 // void (^myImportedClosure)(void);
4102 // myImportedClosure = ^(void) { setGlobalInt(x + y); };
4103 //
4104 // void (^anotherClosure)(void);
4105 // anotherClosure = ^(void) {
4106 // myImportedClosure(); // import and invoke the closure
4107 // };
4108 //
4109 if (isTopLevelBlockPointerType((*I)->getType())) {
4110 RewriteBlockPointerTypeVariable(S, (*I));
4111 S += " = (";
4112 RewriteBlockPointerType(S, (*I)->getType());
4113 S += ")";
4114 S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
4115 }
4116 else {
4117 std::string Name = (*I)->getNameAsString();
4118 QualType QT = (*I)->getType();
4119 if (HasLocalVariableExternalStorage(*I))
4120 QT = Context->getPointerType(QT);
4121 QT.getAsStringInternal(Name, Context->getPrintingPolicy());
4122 S += Name + " = __cself->" +
4123 (*I)->getNameAsString() + "; // bound by copy\n";
4124 }
4125 }
4126 std::string RewrittenStr = RewrittenBlockExprs[CE];
4127 const char *cstr = RewrittenStr.c_str();
4128 while (*cstr++ != '{') ;
4129 S += cstr;
4130 S += "\n";
4131 return S;
4132}
4133
4134std::string RewriteModernObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
4135 StringRef funcName,
4136 std::string Tag) {
4137 std::string StructRef = "struct " + Tag;
4138 std::string S = "static void __";
4139
4140 S += funcName;
4141 S += "_block_copy_" + utostr(i);
4142 S += "(" + StructRef;
4143 S += "*dst, " + StructRef;
4144 S += "*src) {";
4145 for (ValueDecl *VD : ImportedBlockDecls) {
4146 S += "_Block_object_assign((void*)&dst->";
4147 S += VD->getNameAsString();
4148 S += ", (void*)src->";
4149 S += VD->getNameAsString();
4150 if (BlockByRefDeclsPtrSet.count(VD))
4151 S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4152 else if (VD->getType()->isBlockPointerType())
4153 S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4154 else
4155 S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4156 }
4157 S += "}\n";
4158
4159 S += "\nstatic void __";
4160 S += funcName;
4161 S += "_block_dispose_" + utostr(i);
4162 S += "(" + StructRef;
4163 S += "*src) {";
4164 for (ValueDecl *VD : ImportedBlockDecls) {
4165 S += "_Block_object_dispose((void*)src->";
4166 S += VD->getNameAsString();
4167 if (BlockByRefDeclsPtrSet.count(VD))
4168 S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4169 else if (VD->getType()->isBlockPointerType())
4170 S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4171 else
4172 S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4173 }
4174 S += "}\n";
4175 return S;
4176}
4177
4178std::string RewriteModernObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
4179 std::string Desc) {
4180 std::string S = "\nstruct " + Tag;
4181 std::string Constructor = " " + Tag;
4182
4183 S += " {\n struct __block_impl impl;\n";
4184 S += " struct " + Desc;
4185 S += "* Desc;\n";
4186
4187 Constructor += "(void *fp, "; // Invoke function pointer.
4188 Constructor += "struct " + Desc; // Descriptor pointer.
4189 Constructor += " *desc";
4190
4191 if (BlockDeclRefs.size()) {
4192 // Output all "by copy" declarations.
4193 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4194 E = BlockByCopyDecls.end(); I != E; ++I) {
4195 S += " ";
4196 std::string FieldName = (*I)->getNameAsString();
4197 std::string ArgName = "_" + FieldName;
4198 // Handle nested closure invocation. For example:
4199 //
4200 // void (^myImportedBlock)(void);
4201 // myImportedBlock = ^(void) { setGlobalInt(x + y); };
4202 //
4203 // void (^anotherBlock)(void);
4204 // anotherBlock = ^(void) {
4205 // myImportedBlock(); // import and invoke the closure
4206 // };
4207 //
4208 if (isTopLevelBlockPointerType((*I)->getType())) {
4209 S += "struct __block_impl *";
4210 Constructor += ", void *" + ArgName;
4211 } else {
4212 QualType QT = (*I)->getType();
4213 if (HasLocalVariableExternalStorage(*I))
4214 QT = Context->getPointerType(QT);
4215 QT.getAsStringInternal(FieldName, Context->getPrintingPolicy());
4216 QT.getAsStringInternal(ArgName, Context->getPrintingPolicy());
4217 Constructor += ", " + ArgName;
4218 }
4219 S += FieldName + ";\n";
4220 }
4221 // Output all "by ref" declarations.
4222 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4223 E = BlockByRefDecls.end(); I != E; ++I) {
4224 S += " ";
4225 std::string FieldName = (*I)->getNameAsString();
4226 std::string ArgName = "_" + FieldName;
4227 {
4228 std::string TypeString;
4229 RewriteByRefString(TypeString, FieldName, (*I));
4230 TypeString += " *";
4231 FieldName = TypeString + FieldName;
4232 ArgName = TypeString + ArgName;
4233 Constructor += ", " + ArgName;
4234 }
4235 S += FieldName + "; // by ref\n";
4236 }
4237 // Finish writing the constructor.
4238 Constructor += ", int flags=0)";
4239 // Initialize all "by copy" arguments.
4240 bool firsTime = true;
4241 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4242 E = BlockByCopyDecls.end(); I != E; ++I) {
4243 std::string Name = (*I)->getNameAsString();
4244 if (firsTime) {
4245 Constructor += " : ";
4246 firsTime = false;
4247 }
4248 else
4249 Constructor += ", ";
4250 if (isTopLevelBlockPointerType((*I)->getType()))
4251 Constructor += Name + "((struct __block_impl *)_" + Name + ")";
4252 else
4253 Constructor += Name + "(_" + Name + ")";
4254 }
4255 // Initialize all "by ref" arguments.
4256 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4257 E = BlockByRefDecls.end(); I != E; ++I) {
4258 std::string Name = (*I)->getNameAsString();
4259 if (firsTime) {
4260 Constructor += " : ";
4261 firsTime = false;
4262 }
4263 else
4264 Constructor += ", ";
4265 Constructor += Name + "(_" + Name + "->__forwarding)";
4266 }
4267
4268 Constructor += " {\n";
4269 if (GlobalVarDecl)
4270 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4271 else
4272 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4273 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4274
4275 Constructor += " Desc = desc;\n";
4276 } else {
4277 // Finish writing the constructor.
4278 Constructor += ", int flags=0) {\n";
4279 if (GlobalVarDecl)
4280 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4281 else
4282 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4283 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4284 Constructor += " Desc = desc;\n";
4285 }
4286 Constructor += " ";
4287 Constructor += "}\n";
4288 S += Constructor;
4289 S += "};\n";
4290 return S;
4291}
4292
4293std::string RewriteModernObjC::SynthesizeBlockDescriptor(std::string DescTag,
4294 std::string ImplTag, int i,
4295 StringRef FunName,
4296 unsigned hasCopy) {
4297 std::string S = "\nstatic struct " + DescTag;
4298
4299 S += " {\n size_t reserved;\n";
4300 S += " size_t Block_size;\n";
4301 if (hasCopy) {
4302 S += " void (*copy)(struct ";
4303 S += ImplTag; S += "*, struct ";
4304 S += ImplTag; S += "*);\n";
4305
4306 S += " void (*dispose)(struct ";
4307 S += ImplTag; S += "*);\n";
4308 }
4309 S += "} ";
4310
4311 S += DescTag + "_DATA = { 0, sizeof(struct ";
4312 S += ImplTag + ")";
4313 if (hasCopy) {
4314 S += ", __" + FunName.str() + "_block_copy_" + utostr(i);
4315 S += ", __" + FunName.str() + "_block_dispose_" + utostr(i);
4316 }
4317 S += "};\n";
4318 return S;
4319}
4320
4321void RewriteModernObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
4322 StringRef FunName) {
4323 bool RewriteSC = (GlobalVarDecl &&
4324 !Blocks.empty() &&
4325 GlobalVarDecl->getStorageClass() == SC_Static &&
4326 GlobalVarDecl->getType().getCVRQualifiers());
4327 if (RewriteSC) {
4328 std::string SC(" void __");
4329 SC += GlobalVarDecl->getNameAsString();
4330 SC += "() {}";
4331 InsertText(FunLocStart, SC);
4332 }
4333
4334 // Insert closures that were part of the function.
4335 for (unsigned i = 0, count=0; i < Blocks.size(); i++) {
4336 CollectBlockDeclRefInfo(Blocks[i]);
4337 // Need to copy-in the inner copied-in variables not actually used in this
4338 // block.
4339 for (int j = 0; j < InnerDeclRefsCount[i]; j++) {
4340 DeclRefExpr *Exp = InnerDeclRefs[count++];
4341 ValueDecl *VD = Exp->getDecl();
4342 BlockDeclRefs.push_back(Exp);
4343 if (!VD->hasAttr<BlocksAttr>()) {
4344 if (!BlockByCopyDeclsPtrSet.count(VD)) {
4345 BlockByCopyDeclsPtrSet.insert(VD);
4346 BlockByCopyDecls.push_back(VD);
4347 }
4348 continue;
4349 }
4350
4351 if (!BlockByRefDeclsPtrSet.count(VD)) {
4352 BlockByRefDeclsPtrSet.insert(VD);
4353 BlockByRefDecls.push_back(VD);
4354 }
4355
4356 // imported objects in the inner blocks not used in the outer
4357 // blocks must be copied/disposed in the outer block as well.
4358 if (VD->getType()->isObjCObjectPointerType() ||
4359 VD->getType()->isBlockPointerType())
4360 ImportedBlockDecls.insert(VD);
4361 }
4362
4363 std::string ImplTag = "__" + FunName.str() + "_block_impl_" + utostr(i);
4364 std::string DescTag = "__" + FunName.str() + "_block_desc_" + utostr(i);
4365
4366 std::string CI = SynthesizeBlockImpl(Blocks[i], ImplTag, DescTag);
4367
4368 InsertText(FunLocStart, CI);
4369
4370 std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, ImplTag);
4371
4372 InsertText(FunLocStart, CF);
4373
4374 if (ImportedBlockDecls.size()) {
4375 std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, ImplTag);
4376 InsertText(FunLocStart, HF);
4377 }
4378 std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
4379 ImportedBlockDecls.size() > 0);
4380 InsertText(FunLocStart, BD);
4381
4382 BlockDeclRefs.clear();
4383 BlockByRefDecls.clear();
4384 BlockByRefDeclsPtrSet.clear();
4385 BlockByCopyDecls.clear();
4386 BlockByCopyDeclsPtrSet.clear();
4387 ImportedBlockDecls.clear();
4388 }
4389 if (RewriteSC) {
4390 // Must insert any 'const/volatile/static here. Since it has been
4391 // removed as result of rewriting of block literals.
4392 std::string SC;
4393 if (GlobalVarDecl->getStorageClass() == SC_Static)
4394 SC = "static ";
4395 if (GlobalVarDecl->getType().isConstQualified())
4396 SC += "const ";
4397 if (GlobalVarDecl->getType().isVolatileQualified())
4398 SC += "volatile ";
4399 if (GlobalVarDecl->getType().isRestrictQualified())
4400 SC += "restrict ";
4401 InsertText(FunLocStart, SC);
4402 }
4403 if (GlobalConstructionExp) {
4404 // extra fancy dance for global literal expression.
4405
4406 // Always the latest block expression on the block stack.
4407 std::string Tag = "__";
4408 Tag += FunName;
4409 Tag += "_block_impl_";
4410 Tag += utostr(Blocks.size()-1);
4411 std::string globalBuf = "static ";
4412 globalBuf += Tag; globalBuf += " ";
4413 std::string SStr;
4414
4415 llvm::raw_string_ostream constructorExprBuf(SStr);
4416 GlobalConstructionExp->printPretty(constructorExprBuf, nullptr,
4417 PrintingPolicy(LangOpts));
4418 globalBuf += constructorExprBuf.str();
4419 globalBuf += ";\n";
4420 InsertText(FunLocStart, globalBuf);
4421 GlobalConstructionExp = nullptr;
4422 }
4423
4424 Blocks.clear();
4425 InnerDeclRefsCount.clear();
4426 InnerDeclRefs.clear();
4427 RewrittenBlockExprs.clear();
4428}
4429
4430void RewriteModernObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
4431 SourceLocation FunLocStart =
4432 (!Blocks.empty()) ? getFunctionSourceLocation(*this, FD)
4433 : FD->getTypeSpecStartLoc();
4434 StringRef FuncName = FD->getName();
4435
4436 SynthesizeBlockLiterals(FunLocStart, FuncName);
4437}
4438
4439static void BuildUniqueMethodName(std::string &Name,
4440 ObjCMethodDecl *MD) {
4441 ObjCInterfaceDecl *IFace = MD->getClassInterface();
4442 Name = IFace->getName();
4443 Name += "__" + MD->getSelector().getAsString();
4444 // Convert colons to underscores.
4445 std::string::size_type loc = 0;
4446 while ((loc = Name.find(':', loc)) != std::string::npos)
4447 Name.replace(loc, 1, "_");
4448}
4449
4450void RewriteModernObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
4451 // fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
4452 // SourceLocation FunLocStart = MD->getBeginLoc();
4453 SourceLocation FunLocStart = MD->getBeginLoc();
4454 std::string FuncName;
4455 BuildUniqueMethodName(FuncName, MD);
4456 SynthesizeBlockLiterals(FunLocStart, FuncName);
4457}
4458
4459void RewriteModernObjC::GetBlockDeclRefExprs(Stmt *S) {
4460 for (Stmt *SubStmt : S->children())
4461 if (SubStmt) {
4462 if (BlockExpr *CBE = dyn_cast<BlockExpr>(SubStmt))
4463 GetBlockDeclRefExprs(CBE->getBody());
4464 else
4465 GetBlockDeclRefExprs(SubStmt);
4466 }
4467 // Handle specific things.
4468 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S))
4469 if (DRE->refersToEnclosingVariableOrCapture() ||
4470 HasLocalVariableExternalStorage(DRE->getDecl()))
4471 // FIXME: Handle enums.
4472 BlockDeclRefs.push_back(DRE);
4473}
4474
4475void RewriteModernObjC::GetInnerBlockDeclRefExprs(Stmt *S,
4476 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
4477 llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts) {
4478 for (Stmt *SubStmt : S->children())
4479 if (SubStmt) {
4480 if (BlockExpr *CBE = dyn_cast<BlockExpr>(SubStmt)) {
4481 InnerContexts.insert(cast<DeclContext>(CBE->getBlockDecl()));
4482 GetInnerBlockDeclRefExprs(CBE->getBody(),
4483 InnerBlockDeclRefs,
4484 InnerContexts);
4485 }
4486 else
4487 GetInnerBlockDeclRefExprs(SubStmt, InnerBlockDeclRefs, InnerContexts);
4488 }
4489 // Handle specific things.
4490 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
4491 if (DRE->refersToEnclosingVariableOrCapture() ||
4492 HasLocalVariableExternalStorage(DRE->getDecl())) {
4493 if (!InnerContexts.count(DRE->getDecl()->getDeclContext()))
4494 InnerBlockDeclRefs.push_back(DRE);
4495 if (VarDecl *Var = cast<VarDecl>(DRE->getDecl()))
4496 if (Var->isFunctionOrMethodVarDecl())
4497 ImportedLocalExternalDecls.insert(Var);
4498 }
4499 }
4500}
4501
4502/// convertObjCTypeToCStyleType - This routine converts such objc types
4503/// as qualified objects, and blocks to their closest c/c++ types that
4504/// it can. It returns true if input type was modified.
4505bool RewriteModernObjC::convertObjCTypeToCStyleType(QualType &T) {
4506 QualType oldT = T;
4507 convertBlockPointerToFunctionPointer(T);
4508 if (T->isFunctionPointerType()) {
4509 QualType PointeeTy;
4510 if (const PointerType* PT = T->getAs<PointerType>()) {
4511 PointeeTy = PT->getPointeeType();
4512 if (const FunctionType *FT = PointeeTy->getAs<FunctionType>()) {
4513 T = convertFunctionTypeOfBlocks(FT);
4514 T = Context->getPointerType(T);
4515 }
4516 }
4517 }
4518
4519 convertToUnqualifiedObjCType(T);
4520 return T != oldT;
4521}
4522
4523/// convertFunctionTypeOfBlocks - This routine converts a function type
4524/// whose result type may be a block pointer or whose argument type(s)
4525/// might be block pointers to an equivalent function type replacing
4526/// all block pointers to function pointers.
4527QualType RewriteModernObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
4528 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
4529 // FTP will be null for closures that don't take arguments.
4530 // Generate a funky cast.
4531 SmallVector<QualType, 8> ArgTypes;
4532 QualType Res = FT->getReturnType();
4533 bool modified = convertObjCTypeToCStyleType(Res);
4534
4535 if (FTP) {
4536 for (auto &I : FTP->param_types()) {
4537 QualType t = I;
4538 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4539 if (convertObjCTypeToCStyleType(t))
4540 modified = true;
4541 ArgTypes.push_back(t);
4542 }
4543 }
4544 QualType FuncType;
4545 if (modified)
4546 FuncType = getSimpleFunctionType(Res, ArgTypes);
4547 else FuncType = QualType(FT, 0);
4548 return FuncType;
4549}
4550
4551Stmt *RewriteModernObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
4552 // Navigate to relevant type information.
4553 const BlockPointerType *CPT = nullptr;
4554
4555 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BlockExp)) {
4556 CPT = DRE->getType()->getAs<BlockPointerType>();
4557 } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(BlockExp)) {
4558 CPT = MExpr->getType()->getAs<BlockPointerType>();
4559 }
4560 else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(BlockExp)) {
4561 return SynthesizeBlockCall(Exp, PRE->getSubExpr());
4562 }
4563 else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(BlockExp))
4564 CPT = IEXPR->getType()->getAs<BlockPointerType>();
4565 else if (const ConditionalOperator *CEXPR =
4566 dyn_cast<ConditionalOperator>(BlockExp)) {
4567 Expr *LHSExp = CEXPR->getLHS();
4568 Stmt *LHSStmt = SynthesizeBlockCall(Exp, LHSExp);
4569 Expr *RHSExp = CEXPR->getRHS();
4570 Stmt *RHSStmt = SynthesizeBlockCall(Exp, RHSExp);
4571 Expr *CONDExp = CEXPR->getCond();
4572 ConditionalOperator *CondExpr =
4573 new (Context) ConditionalOperator(CONDExp,
4574 SourceLocation(), cast<Expr>(LHSStmt),
4575 SourceLocation(), cast<Expr>(RHSStmt),
4576 Exp->getType(), VK_RValue, OK_Ordinary);
4577 return CondExpr;
4578 } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(BlockExp)) {
4579 CPT = IRE->getType()->getAs<BlockPointerType>();
4580 } else if (const PseudoObjectExpr *POE
4581 = dyn_cast<PseudoObjectExpr>(BlockExp)) {
4582 CPT = POE->getType()->castAs<BlockPointerType>();
4583 } else {
4584 assert(false && "RewriteBlockClass: Bad type")((false && "RewriteBlockClass: Bad type") ? static_cast
<void> (0) : __assert_fail ("false && \"RewriteBlockClass: Bad type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4584, __PRETTY_FUNCTION__))
;
4585 }
4586 assert(CPT && "RewriteBlockClass: Bad type")((CPT && "RewriteBlockClass: Bad type") ? static_cast
<void> (0) : __assert_fail ("CPT && \"RewriteBlockClass: Bad type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4586, __PRETTY_FUNCTION__))
;
4587 const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
4588 assert(FT && "RewriteBlockClass: Bad type")((FT && "RewriteBlockClass: Bad type") ? static_cast<
void> (0) : __assert_fail ("FT && \"RewriteBlockClass: Bad type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4588, __PRETTY_FUNCTION__))
;
4589 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
4590 // FTP will be null for closures that don't take arguments.
4591
4592 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
4593 SourceLocation(), SourceLocation(),
4594 &Context->Idents.get("__block_impl"));
4595 QualType PtrBlock = Context->getPointerType(Context->getTagDeclType(RD));
4596
4597 // Generate a funky cast.
4598 SmallVector<QualType, 8> ArgTypes;
4599
4600 // Push the block argument type.
4601 ArgTypes.push_back(PtrBlock);
4602 if (FTP) {
4603 for (auto &I : FTP->param_types()) {
4604 QualType t = I;
4605 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4606 if (!convertBlockPointerToFunctionPointer(t))
4607 convertToUnqualifiedObjCType(t);
4608 ArgTypes.push_back(t);
4609 }
4610 }
4611 // Now do the pointer to function cast.
4612 QualType PtrToFuncCastType = getSimpleFunctionType(Exp->getType(), ArgTypes);
4613
4614 PtrToFuncCastType = Context->getPointerType(PtrToFuncCastType);
4615
4616 CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Context, PtrBlock,
4617 CK_BitCast,
4618 const_cast<Expr*>(BlockExp));
4619 // Don't forget the parens to enforce the proper binding.
4620 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4621 BlkCast);
4622 //PE->dump();
4623
4624 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
4625 SourceLocation(),
4626 &Context->Idents.get("FuncPtr"),
4627 Context->VoidPtrTy, nullptr,
4628 /*BitWidth=*/nullptr, /*Mutable=*/true,
4629 ICIS_NoInit);
4630 MemberExpr *ME = MemberExpr::CreateImplicit(
4631 *Context, PE, true, FD, FD->getType(), VK_LValue, OK_Ordinary);
4632
4633 CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Context, PtrToFuncCastType,
4634 CK_BitCast, ME);
4635 PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
4636
4637 SmallVector<Expr*, 8> BlkExprs;
4638 // Add the implicit argument.
4639 BlkExprs.push_back(BlkCast);
4640 // Add the user arguments.
4641 for (CallExpr::arg_iterator I = Exp->arg_begin(),
4642 E = Exp->arg_end(); I != E; ++I) {
4643 BlkExprs.push_back(*I);
4644 }
4645 CallExpr *CE = CallExpr::Create(*Context, PE, BlkExprs, Exp->getType(),
4646 VK_RValue, SourceLocation());
4647 return CE;
4648}
4649
4650// We need to return the rewritten expression to handle cases where the
4651// DeclRefExpr is embedded in another expression being rewritten.
4652// For example:
4653//
4654// int main() {
4655// __block Foo *f;
4656// __block int i;
4657//
4658// void (^myblock)() = ^() {
4659// [f test]; // f is a DeclRefExpr embedded in a message (which is being rewritten).
4660// i = 77;
4661// };
4662//}
4663Stmt *RewriteModernObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
4664 // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
4665 // for each DeclRefExp where BYREFVAR is name of the variable.
4666 ValueDecl *VD = DeclRefExp->getDecl();
4667 bool isArrow = DeclRefExp->refersToEnclosingVariableOrCapture() ||
4668 HasLocalVariableExternalStorage(DeclRefExp->getDecl());
4669
4670 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
4671 SourceLocation(),
4672 &Context->Idents.get("__forwarding"),
4673 Context->VoidPtrTy, nullptr,
4674 /*BitWidth=*/nullptr, /*Mutable=*/true,
4675 ICIS_NoInit);
4676 MemberExpr *ME = MemberExpr::CreateImplicit(
4677 *Context, DeclRefExp, isArrow, FD, FD->getType(), VK_LValue, OK_Ordinary);
4678
4679 StringRef Name = VD->getName();
4680 FD = FieldDecl::Create(*Context, nullptr, SourceLocation(), SourceLocation(),
4681 &Context->Idents.get(Name),
4682 Context->VoidPtrTy, nullptr,
4683 /*BitWidth=*/nullptr, /*Mutable=*/true,
4684 ICIS_NoInit);
4685 ME = MemberExpr::CreateImplicit(*Context, ME, true, FD, DeclRefExp->getType(),
4686 VK_LValue, OK_Ordinary);
4687
4688 // Need parens to enforce precedence.
4689 ParenExpr *PE = new (Context) ParenExpr(DeclRefExp->getExprLoc(),
4690 DeclRefExp->getExprLoc(),
4691 ME);
4692 ReplaceStmt(DeclRefExp, PE);
4693 return PE;
4694}
4695
4696// Rewrites the imported local variable V with external storage
4697// (static, extern, etc.) as *V
4698//
4699Stmt *RewriteModernObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
4700 ValueDecl *VD = DRE->getDecl();
4701 if (VarDecl *Var = dyn_cast<VarDecl>(VD))
4702 if (!ImportedLocalExternalDecls.count(Var))
4703 return DRE;
4704 Expr *Exp = new (Context) UnaryOperator(DRE, UO_Deref, DRE->getType(),
4705 VK_LValue, OK_Ordinary,
4706 DRE->getLocation(), false);
4707 // Need parens to enforce precedence.
4708 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4709 Exp);
4710 ReplaceStmt(DRE, PE);
4711 return PE;
4712}
4713
4714void RewriteModernObjC::RewriteCastExpr(CStyleCastExpr *CE) {
4715 SourceLocation LocStart = CE->getLParenLoc();
4716 SourceLocation LocEnd = CE->getRParenLoc();
4717
4718 // Need to avoid trying to rewrite synthesized casts.
4719 if (LocStart.isInvalid())
4720 return;
4721 // Need to avoid trying to rewrite casts contained in macros.
4722 if (!Rewriter::isRewritable(LocStart) || !Rewriter::isRewritable(LocEnd))
4723 return;
4724
4725 const char *startBuf = SM->getCharacterData(LocStart);
4726 const char *endBuf = SM->getCharacterData(LocEnd);
4727 QualType QT = CE->getType();
4728 const Type* TypePtr = QT->getAs<Type>();
4729 if (isa<TypeOfExprType>(TypePtr)) {
4730 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
4731 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
4732 std::string TypeAsString = "(";
4733 RewriteBlockPointerType(TypeAsString, QT);
4734 TypeAsString += ")";
4735 ReplaceText(LocStart, endBuf-startBuf+1, TypeAsString);
4736 return;
4737 }
4738 // advance the location to startArgList.
4739 const char *argPtr = startBuf;
4740
4741 while (*argPtr++ && (argPtr < endBuf)) {
4742 switch (*argPtr) {
4743 case '^':
4744 // Replace the '^' with '*'.
4745 LocStart = LocStart.getLocWithOffset(argPtr-startBuf);
4746 ReplaceText(LocStart, 1, "*");
4747 break;
4748 }
4749 }
4750}
4751
4752void RewriteModernObjC::RewriteImplicitCastObjCExpr(CastExpr *IC) {
4753 CastKind CastKind = IC->getCastKind();
4754 if (CastKind != CK_BlockPointerToObjCPointerCast &&
4755 CastKind != CK_AnyPointerToBlockPointerCast)
4756 return;
4757
4758 QualType QT = IC->getType();
4759 (void)convertBlockPointerToFunctionPointer(QT);
4760 std::string TypeString(QT.getAsString(Context->getPrintingPolicy()));
4761 std::string Str = "(";
4762 Str += TypeString;
4763 Str += ")";
4764 InsertText(IC->getSubExpr()->getBeginLoc(), Str);
4765}
4766
4767void RewriteModernObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
4768 SourceLocation DeclLoc = FD->getLocation();
4769 unsigned parenCount = 0;
4770
4771 // We have 1 or more arguments that have closure pointers.
4772 const char *startBuf = SM->getCharacterData(DeclLoc);
4773 const char *startArgList = strchr(startBuf, '(');
4774
4775 assert((*startArgList == '(') && "Rewriter fuzzy parser confused")(((*startArgList == '(') && "Rewriter fuzzy parser confused"
) ? static_cast<void> (0) : __assert_fail ("(*startArgList == '(') && \"Rewriter fuzzy parser confused\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4775, __PRETTY_FUNCTION__))
;
4776
4777 parenCount++;
4778 // advance the location to startArgList.
4779 DeclLoc = DeclLoc.getLocWithOffset(startArgList-startBuf);
4780 assert((DeclLoc.isValid()) && "Invalid DeclLoc")(((DeclLoc.isValid()) && "Invalid DeclLoc") ? static_cast
<void> (0) : __assert_fail ("(DeclLoc.isValid()) && \"Invalid DeclLoc\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4780, __PRETTY_FUNCTION__))
;
4781
4782 const char *argPtr = startArgList;
4783
4784 while (*argPtr++ && parenCount) {
4785 switch (*argPtr) {
4786 case '^':
4787 // Replace the '^' with '*'.
4788 DeclLoc = DeclLoc.getLocWithOffset(argPtr-startArgList);
4789 ReplaceText(DeclLoc, 1, "*");
4790 break;
4791 case '(':
4792 parenCount++;
4793 break;
4794 case ')':
4795 parenCount--;
4796 break;
4797 }
4798 }
4799}
4800
4801bool RewriteModernObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
4802 const FunctionProtoType *FTP;
4803 const PointerType *PT = QT->getAs<PointerType>();
4804 if (PT) {
4805 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4806 } else {
4807 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4808 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type")((BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type"
) ? static_cast<void> (0) : __assert_fail ("BPT && \"BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4808, __PRETTY_FUNCTION__))
;
4809 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4810 }
4811 if (FTP) {
4812 for (const auto &I : FTP->param_types())
4813 if (isTopLevelBlockPointerType(I))
4814 return true;
4815 }
4816 return false;
4817}
4818
4819bool RewriteModernObjC::PointerTypeTakesAnyObjCQualifiedType(QualType QT) {
4820 const FunctionProtoType *FTP;
4821 const PointerType *PT = QT->getAs<PointerType>();
4822 if (PT) {
4823 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4824 } else {
4825 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4826 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type")((BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type"
) ? static_cast<void> (0) : __assert_fail ("BPT && \"BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4826, __PRETTY_FUNCTION__))
;
4827 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4828 }
4829 if (FTP) {
4830 for (const auto &I : FTP->param_types()) {
4831 if (I->isObjCQualifiedIdType())
4832 return true;
4833 if (I->isObjCObjectPointerType() &&
4834 I->getPointeeType()->isObjCQualifiedInterfaceType())
4835 return true;
4836 }
4837
4838 }
4839 return false;
4840}
4841
4842void RewriteModernObjC::GetExtentOfArgList(const char *Name, const char *&LParen,
4843 const char *&RParen) {
4844 const char *argPtr = strchr(Name, '(');
4845 assert((*argPtr == '(') && "Rewriter fuzzy parser confused")(((*argPtr == '(') && "Rewriter fuzzy parser confused"
) ? static_cast<void> (0) : __assert_fail ("(*argPtr == '(') && \"Rewriter fuzzy parser confused\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4845, __PRETTY_FUNCTION__))
;
4846
4847 LParen = argPtr; // output the start.
4848 argPtr++; // skip past the left paren.
4849 unsigned parenCount = 1;
4850
4851 while (*argPtr && parenCount) {
4852 switch (*argPtr) {
4853 case '(': parenCount++; break;
4854 case ')': parenCount--; break;
4855 default: break;
4856 }
4857 if (parenCount) argPtr++;
4858 }
4859 assert((*argPtr == ')') && "Rewriter fuzzy parser confused")(((*argPtr == ')') && "Rewriter fuzzy parser confused"
) ? static_cast<void> (0) : __assert_fail ("(*argPtr == ')') && \"Rewriter fuzzy parser confused\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4859, __PRETTY_FUNCTION__))
;
4860 RParen = argPtr; // output the end
4861}
4862
4863void RewriteModernObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
4864 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
4865 RewriteBlockPointerFunctionArgs(FD);
4866 return;
4867 }
4868 // Handle Variables and Typedefs.
4869 SourceLocation DeclLoc = ND->getLocation();
4870 QualType DeclT;
4871 if (VarDecl *VD = dyn_cast<VarDecl>(ND))
4872 DeclT = VD->getType();
4873 else if (TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(ND))
4874 DeclT = TDD->getUnderlyingType();
4875 else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND))
4876 DeclT = FD->getType();
4877 else
4878 llvm_unreachable("RewriteBlockPointerDecl(): Decl type not yet handled")::llvm::llvm_unreachable_internal("RewriteBlockPointerDecl(): Decl type not yet handled"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4878)
;
4879
4880 const char *startBuf = SM->getCharacterData(DeclLoc);
4881 const char *endBuf = startBuf;
4882 // scan backward (from the decl location) for the end of the previous decl.
4883 while (*startBuf != '^' && *startBuf != ';' && startBuf != MainFileStart)
4884 startBuf--;
4885 SourceLocation Start = DeclLoc.getLocWithOffset(startBuf-endBuf);
4886 std::string buf;
4887 unsigned OrigLength=0;
4888 // *startBuf != '^' if we are dealing with a pointer to function that
4889 // may take block argument types (which will be handled below).
4890 if (*startBuf == '^') {
4891 // Replace the '^' with '*', computing a negative offset.
4892 buf = '*';
4893 startBuf++;
4894 OrigLength++;
4895 }
4896 while (*startBuf != ')') {
4897 buf += *startBuf;
4898 startBuf++;
4899 OrigLength++;
4900 }
4901 buf += ')';
4902 OrigLength++;
4903
4904 if (PointerTypeTakesAnyBlockArguments(DeclT) ||
4905 PointerTypeTakesAnyObjCQualifiedType(DeclT)) {
4906 // Replace the '^' with '*' for arguments.
4907 // Replace id<P> with id/*<>*/
4908 DeclLoc = ND->getLocation();
4909 startBuf = SM->getCharacterData(DeclLoc);
4910 const char *argListBegin, *argListEnd;
4911 GetExtentOfArgList(startBuf, argListBegin, argListEnd);
4912 while (argListBegin < argListEnd) {
4913 if (*argListBegin == '^')
4914 buf += '*';
4915 else if (*argListBegin == '<') {
4916 buf += "/*";
4917 buf += *argListBegin++;
4918 OrigLength++;
4919 while (*argListBegin != '>') {
4920 buf += *argListBegin++;
4921 OrigLength++;
4922 }
4923 buf += *argListBegin;
4924 buf += "*/";
4925 }
4926 else
4927 buf += *argListBegin;
4928 argListBegin++;
4929 OrigLength++;
4930 }
4931 buf += ')';
4932 OrigLength++;
4933 }
4934 ReplaceText(Start, OrigLength, buf);
4935}
4936
4937/// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
4938/// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
4939/// struct Block_byref_id_object *src) {
4940/// _Block_object_assign (&_dest->object, _src->object,
4941/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4942/// [|BLOCK_FIELD_IS_WEAK]) // object
4943/// _Block_object_assign(&_dest->object, _src->object,
4944/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4945/// [|BLOCK_FIELD_IS_WEAK]) // block
4946/// }
4947/// And:
4948/// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
4949/// _Block_object_dispose(_src->object,
4950/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4951/// [|BLOCK_FIELD_IS_WEAK]) // object
4952/// _Block_object_dispose(_src->object,
4953/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4954/// [|BLOCK_FIELD_IS_WEAK]) // block
4955/// }
4956
4957std::string RewriteModernObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
4958 int flag) {
4959 std::string S;
4960 if (CopyDestroyCache.count(flag))
4961 return S;
4962 CopyDestroyCache.insert(flag);
4963 S = "static void __Block_byref_id_object_copy_";
4964 S += utostr(flag);
4965 S += "(void *dst, void *src) {\n";
4966
4967 // offset into the object pointer is computed as:
4968 // void * + void* + int + int + void* + void *
4969 unsigned IntSize =
4970 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
4971 unsigned VoidPtrSize =
4972 static_cast<unsigned>(Context->getTypeSize(Context->VoidPtrTy));
4973
4974 unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/Context->getCharWidth();
4975 S += " _Block_object_assign((char*)dst + ";
4976 S += utostr(offset);
4977 S += ", *(void * *) ((char*)src + ";
4978 S += utostr(offset);
4979 S += "), ";
4980 S += utostr(flag);
4981 S += ");\n}\n";
4982
4983 S += "static void __Block_byref_id_object_dispose_";
4984 S += utostr(flag);
4985 S += "(void *src) {\n";
4986 S += " _Block_object_dispose(*(void * *) ((char*)src + ";
4987 S += utostr(offset);
4988 S += "), ";
4989 S += utostr(flag);
4990 S += ");\n}\n";
4991 return S;
4992}
4993
4994/// RewriteByRefVar - For each __block typex ND variable this routine transforms
4995/// the declaration into:
4996/// struct __Block_byref_ND {
4997/// void *__isa; // NULL for everything except __weak pointers
4998/// struct __Block_byref_ND *__forwarding;
4999/// int32_t __flags;
5000/// int32_t __size;
5001/// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
5002/// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
5003/// typex ND;
5004/// };
5005///
5006/// It then replaces declaration of ND variable with:
5007/// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
5008/// __size=sizeof(struct __Block_byref_ND),
5009/// ND=initializer-if-any};
5010///
5011///
5012void RewriteModernObjC::RewriteByRefVar(VarDecl *ND, bool firstDecl,
5013 bool lastDecl) {
5014 int flag = 0;
5015 int isa = 0;
5016 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
5017 if (DeclLoc.isInvalid())
5018 // If type location is missing, it is because of missing type (a warning).
5019 // Use variable's location which is good for this case.
5020 DeclLoc = ND->getLocation();
5021 const char *startBuf = SM->getCharacterData(DeclLoc);
5022 SourceLocation X = ND->getEndLoc();
5023 X = SM->getExpansionLoc(X);
5024 const char *endBuf = SM->getCharacterData(X);
5025 std::string Name(ND->getNameAsString());
5026 std::string ByrefType;
5027 RewriteByRefString(ByrefType, Name, ND, true);
5028 ByrefType += " {\n";
5029 ByrefType += " void *__isa;\n";
5030 RewriteByRefString(ByrefType, Name, ND);
5031 ByrefType += " *__forwarding;\n";
5032 ByrefType += " int __flags;\n";
5033 ByrefType += " int __size;\n";
5034 // Add void *__Block_byref_id_object_copy;
5035 // void *__Block_byref_id_object_dispose; if needed.
5036 QualType Ty = ND->getType();
5037 bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty, ND);
5038 if (HasCopyAndDispose) {
5039 ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
5040 ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
5041 }
5042
5043 QualType T = Ty;
5044 (void)convertBlockPointerToFunctionPointer(T);
5045 T.getAsStringInternal(Name, Context->getPrintingPolicy());
5046
5047 ByrefType += " " + Name + ";\n";
5048 ByrefType += "};\n";
5049 // Insert this type in global scope. It is needed by helper function.
5050 SourceLocation FunLocStart;
5051 if (CurFunctionDef)
5052 FunLocStart = getFunctionSourceLocation(*this, CurFunctionDef);
5053 else {
5054 assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null")((CurMethodDef && "RewriteByRefVar - CurMethodDef is null"
) ? static_cast<void> (0) : __assert_fail ("CurMethodDef && \"RewriteByRefVar - CurMethodDef is null\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5054, __PRETTY_FUNCTION__))
;
5055 FunLocStart = CurMethodDef->getBeginLoc();
5056 }
5057 InsertText(FunLocStart, ByrefType);
5058
5059 if (Ty.isObjCGCWeak()) {
5060 flag |= BLOCK_FIELD_IS_WEAK;
5061 isa = 1;
5062 }
5063 if (HasCopyAndDispose) {
5064 flag = BLOCK_BYREF_CALLER;
5065 QualType Ty = ND->getType();
5066 // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.
5067 if (Ty->isBlockPointerType())
5068 flag |= BLOCK_FIELD_IS_BLOCK;
5069 else
5070 flag |= BLOCK_FIELD_IS_OBJECT;
5071 std::string HF = SynthesizeByrefCopyDestroyHelper(ND, flag);
5072 if (!HF.empty())
5073 Preamble += HF;
5074 }
5075
5076 // struct __Block_byref_ND ND =
5077 // {0, &ND, some_flag, __size=sizeof(struct __Block_byref_ND),
5078 // initializer-if-any};
5079 bool hasInit = (ND->getInit() != nullptr);
5080 // FIXME. rewriter does not support __block c++ objects which
5081 // require construction.
5082 if (hasInit)
5083 if (CXXConstructExpr *CExp = dyn_cast<CXXConstructExpr>(ND->getInit())) {
5084 CXXConstructorDecl *CXXDecl = CExp->getConstructor();
5085 if (CXXDecl && CXXDecl->isDefaultConstructor())
5086 hasInit = false;
5087 }
5088
5089 unsigned flags = 0;
5090 if (HasCopyAndDispose)
5091 flags |= BLOCK_HAS_COPY_DISPOSE;
5092 Name = ND->getNameAsString();
5093 ByrefType.clear();
5094 RewriteByRefString(ByrefType, Name, ND);
5095 std::string ForwardingCastType("(");
5096 ForwardingCastType += ByrefType + " *)";
5097 ByrefType += " " + Name + " = {(void*)";
5098 ByrefType += utostr(isa);
5099 ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
5100 ByrefType += utostr(flags);
5101 ByrefType += ", ";
5102 ByrefType += "sizeof(";
5103 RewriteByRefString(ByrefType, Name, ND);
5104 ByrefType += ")";
5105 if (HasCopyAndDispose) {
5106 ByrefType += ", __Block_byref_id_object_copy_";
5107 ByrefType += utostr(flag);
5108 ByrefType += ", __Block_byref_id_object_dispose_";
5109 ByrefType += utostr(flag);
5110 }
5111
5112 if (!firstDecl) {
5113 // In multiple __block declarations, and for all but 1st declaration,
5114 // find location of the separating comma. This would be start location
5115 // where new text is to be inserted.
5116 DeclLoc = ND->getLocation();
5117 const char *startDeclBuf = SM->getCharacterData(DeclLoc);
5118 const char *commaBuf = startDeclBuf;
5119 while (*commaBuf != ',')
5120 commaBuf--;
5121 assert((*commaBuf == ',') && "RewriteByRefVar: can't find ','")(((*commaBuf == ',') && "RewriteByRefVar: can't find ','"
) ? static_cast<void> (0) : __assert_fail ("(*commaBuf == ',') && \"RewriteByRefVar: can't find ','\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5121, __PRETTY_FUNCTION__))
;
5122 DeclLoc = DeclLoc.getLocWithOffset(commaBuf - startDeclBuf);
5123 startBuf = commaBuf;
5124 }
5125
5126 if (!hasInit) {
5127 ByrefType += "};\n";
5128 unsigned nameSize = Name.size();
5129 // for block or function pointer declaration. Name is already
5130 // part of the declaration.
5131 if (Ty->isBlockPointerType() || Ty->isFunctionPointerType())
5132 nameSize = 1;
5133 ReplaceText(DeclLoc, endBuf-startBuf+nameSize, ByrefType);
5134 }
5135 else {
5136 ByrefType += ", ";
5137 SourceLocation startLoc;
5138 Expr *E = ND->getInit();
5139 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
5140 startLoc = ECE->getLParenLoc();
5141 else
5142 startLoc = E->getBeginLoc();
5143 startLoc = SM->getExpansionLoc(startLoc);
5144 endBuf = SM->getCharacterData(startLoc);
5145 ReplaceText(DeclLoc, endBuf-startBuf, ByrefType);
5146
5147 const char separator = lastDecl ? ';' : ',';
5148 const char *startInitializerBuf = SM->getCharacterData(startLoc);
5149 const char *separatorBuf = strchr(startInitializerBuf, separator);
5150 assert((*separatorBuf == separator) &&(((*separatorBuf == separator) && "RewriteByRefVar: can't find ';' or ','"
) ? static_cast<void> (0) : __assert_fail ("(*separatorBuf == separator) && \"RewriteByRefVar: can't find ';' or ','\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5151, __PRETTY_FUNCTION__))
5151 "RewriteByRefVar: can't find ';' or ','")(((*separatorBuf == separator) && "RewriteByRefVar: can't find ';' or ','"
) ? static_cast<void> (0) : __assert_fail ("(*separatorBuf == separator) && \"RewriteByRefVar: can't find ';' or ','\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5151, __PRETTY_FUNCTION__))
;
5152 SourceLocation separatorLoc =
5153 startLoc.getLocWithOffset(separatorBuf-startInitializerBuf);
5154
5155 InsertText(separatorLoc, lastDecl ? "}" : "};\n");
5156 }
5157}
5158
5159void RewriteModernObjC::CollectBlockDeclRefInfo(BlockExpr *Exp) {
5160 // Add initializers for any closure decl refs.
5161 GetBlockDeclRefExprs(Exp->getBody());
5162 if (BlockDeclRefs.size()) {
5163 // Unique all "by copy" declarations.
5164 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5165 if (!BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
5166 if (!BlockByCopyDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
5167 BlockByCopyDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
5168 BlockByCopyDecls.push_back(BlockDeclRefs[i]->getDecl());
5169 }
5170 }
5171 // Unique all "by ref" declarations.
5172 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5173 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
5174 if (!BlockByRefDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
5175 BlockByRefDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
5176 BlockByRefDecls.push_back(BlockDeclRefs[i]->getDecl());
5177 }
5178 }
5179 // Find any imported blocks...they will need special attention.
5180 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5181 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
5182 BlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5183 BlockDeclRefs[i]->getType()->isBlockPointerType())
5184 ImportedBlockDecls.insert(BlockDeclRefs[i]->getDecl());
5185 }
5186}
5187
5188FunctionDecl *RewriteModernObjC::SynthBlockInitFunctionDecl(StringRef name) {
5189 IdentifierInfo *ID = &Context->Idents.get(name);
5190 QualType FType = Context->getFunctionNoProtoType(Context->VoidPtrTy);
5191 return FunctionDecl::Create(*Context, TUDecl, SourceLocation(),
5192 SourceLocation(), ID, FType, nullptr, SC_Extern,
5193 false, false);
5194}
5195
5196Stmt *RewriteModernObjC::SynthBlockInitExpr(BlockExpr *Exp,
5197 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs) {
5198 const BlockDecl *block = Exp->getBlockDecl();
5199
5200 Blocks.push_back(Exp);
5201
5202 CollectBlockDeclRefInfo(Exp);
5203
5204 // Add inner imported variables now used in current block.
5205 int countOfInnerDecls = 0;
5206 if (!InnerBlockDeclRefs.empty()) {
5207 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++) {
5208 DeclRefExpr *Exp = InnerBlockDeclRefs[i];
5209 ValueDecl *VD = Exp->getDecl();
5210 if (!VD->hasAttr<BlocksAttr>() && !BlockByCopyDeclsPtrSet.count(VD)) {
5211 // We need to save the copied-in variables in nested
5212 // blocks because it is needed at the end for some of the API generations.
5213 // See SynthesizeBlockLiterals routine.
5214 InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
5215 BlockDeclRefs.push_back(Exp);
5216 BlockByCopyDeclsPtrSet.insert(VD);
5217 BlockByCopyDecls.push_back(VD);
5218 }
5219 if (VD->hasAttr<BlocksAttr>() && !BlockByRefDeclsPtrSet.count(VD)) {
5220 InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
5221 BlockDeclRefs.push_back(Exp);
5222 BlockByRefDeclsPtrSet.insert(VD);
5223 BlockByRefDecls.push_back(VD);
5224 }
5225 }
5226 // Find any imported blocks...they will need special attention.
5227 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++)
5228 if (InnerBlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
5229 InnerBlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5230 InnerBlockDeclRefs[i]->getType()->isBlockPointerType())
5231 ImportedBlockDecls.insert(InnerBlockDeclRefs[i]->getDecl());
5232 }
5233 InnerDeclRefsCount.push_back(countOfInnerDecls);
5234
5235 std::string FuncName;
5236
5237 if (CurFunctionDef)
5238 FuncName = CurFunctionDef->getNameAsString();
5239 else if (CurMethodDef)
5240 BuildUniqueMethodName(FuncName, CurMethodDef);
5241 else if (GlobalVarDecl)
5242 FuncName = std::string(GlobalVarDecl->getNameAsString());
5243
5244 bool GlobalBlockExpr =
5245 block->getDeclContext()->getRedeclContext()->isFileContext();
5246
5247 if (GlobalBlockExpr && !GlobalVarDecl) {
5248 Diags.Report(block->getLocation(), GlobalBlockRewriteFailedDiag);
5249 GlobalBlockExpr = false;
5250 }
5251
5252 std::string BlockNumber = utostr(Blocks.size()-1);
5253
5254 std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
5255
5256 // Get a pointer to the function type so we can cast appropriately.
5257 QualType BFT = convertFunctionTypeOfBlocks(Exp->getFunctionType());
5258 QualType FType = Context->getPointerType(BFT);
5259
5260 FunctionDecl *FD;
5261 Expr *NewRep;
5262
5263 // Simulate a constructor call...
5264 std::string Tag;
5265
5266 if (GlobalBlockExpr)
5267 Tag = "__global_";
5268 else
5269 Tag = "__";
5270 Tag += FuncName + "_block_impl_" + BlockNumber;
5271
5272 FD = SynthBlockInitFunctionDecl(Tag);
5273 DeclRefExpr *DRE = new (Context)
5274 DeclRefExpr(*Context, FD, false, FType, VK_RValue, SourceLocation());
5275
5276 SmallVector<Expr*, 4> InitExprs;
5277
5278 // Initialize the block function.
5279 FD = SynthBlockInitFunctionDecl(Func);
5280 DeclRefExpr *Arg = new (Context) DeclRefExpr(
5281 *Context, FD, false, FD->getType(), VK_LValue, SourceLocation());
5282 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
5283 CK_BitCast, Arg);
5284 InitExprs.push_back(castExpr);
5285
5286 // Initialize the block descriptor.
5287 std::string DescData = "__" + FuncName + "_block_desc_" + BlockNumber + "_DATA";
5288
5289 VarDecl *NewVD = VarDecl::Create(
5290 *Context, TUDecl, SourceLocation(), SourceLocation(),
5291 &Context->Idents.get(DescData), Context->VoidPtrTy, nullptr, SC_Static);
5292 UnaryOperator *DescRefExpr = new (Context) UnaryOperator(
5293 new (Context) DeclRefExpr(*Context, NewVD, false, Context->VoidPtrTy,
5294 VK_LValue, SourceLocation()),
5295 UO_AddrOf, Context->getPointerType(Context->VoidPtrTy), VK_RValue,
5296 OK_Ordinary, SourceLocation(), false);
5297 InitExprs.push_back(DescRefExpr);
5298
5299 // Add initializers for any closure decl refs.
5300 if (BlockDeclRefs.size()) {
5301 Expr *Exp;
5302 // Output all "by copy" declarations.
5303 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
5304 E = BlockByCopyDecls.end(); I != E; ++I) {
5305 if (isObjCType((*I)->getType())) {
5306 // FIXME: Conform to ABI ([[obj retain] autorelease]).
5307 FD = SynthBlockInitFunctionDecl((*I)->getName());
5308 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5309 VK_LValue, SourceLocation());
5310 if (HasLocalVariableExternalStorage(*I)) {
5311 QualType QT = (*I)->getType();
5312 QT = Context->getPointerType(QT);
5313 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
5314 OK_Ordinary, SourceLocation(),
5315 false);
5316 }
5317 } else if (isTopLevelBlockPointerType((*I)->getType())) {
5318 FD = SynthBlockInitFunctionDecl((*I)->getName());
5319 Arg = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5320 VK_LValue, SourceLocation());
5321 Exp = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
5322 CK_BitCast, Arg);
5323 } else {
5324 FD = SynthBlockInitFunctionDecl((*I)->getName());
5325 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5326 VK_LValue, SourceLocation());
5327 if (HasLocalVariableExternalStorage(*I)) {
5328 QualType QT = (*I)->getType();
5329 QT = Context->getPointerType(QT);
5330 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
5331 OK_Ordinary, SourceLocation(),
5332 false);
5333 }
5334
5335 }
5336 InitExprs.push_back(Exp);
5337 }
5338 // Output all "by ref" declarations.
5339 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
5340 E = BlockByRefDecls.end(); I != E; ++I) {
5341 ValueDecl *ND = (*I);
5342 std::string Name(ND->getNameAsString());
5343 std::string RecName;
5344 RewriteByRefString(RecName, Name, ND, true);
5345 IdentifierInfo *II = &Context->Idents.get(RecName.c_str()
5346 + sizeof("struct"));
5347 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
5348 SourceLocation(), SourceLocation(),
5349 II);
5350 assert(RD && "SynthBlockInitExpr(): Can't find RecordDecl")((RD && "SynthBlockInitExpr(): Can't find RecordDecl"
) ? static_cast<void> (0) : __assert_fail ("RD && \"SynthBlockInitExpr(): Can't find RecordDecl\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5350, __PRETTY_FUNCTION__))
;
5351 QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
5352
5353 FD = SynthBlockInitFunctionDecl((*I)->getName());
5354 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5355 VK_LValue, SourceLocation());
5356 bool isNestedCapturedVar = false;
5357 if (block)
5358 for (const auto &CI : block->captures()) {
5359 const VarDecl *variable = CI.getVariable();
5360 if (variable == ND && CI.isNested()) {
5361 assert (CI.isByRef() &&((CI.isByRef() && "SynthBlockInitExpr - captured block variable is not byref"
) ? static_cast<void> (0) : __assert_fail ("CI.isByRef() && \"SynthBlockInitExpr - captured block variable is not byref\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5362, __PRETTY_FUNCTION__))
5362 "SynthBlockInitExpr - captured block variable is not byref")((CI.isByRef() && "SynthBlockInitExpr - captured block variable is not byref"
) ? static_cast<void> (0) : __assert_fail ("CI.isByRef() && \"SynthBlockInitExpr - captured block variable is not byref\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5362, __PRETTY_FUNCTION__))
;
5363 isNestedCapturedVar = true;
5364 break;
5365 }
5366 }
5367 // captured nested byref variable has its address passed. Do not take
5368 // its address again.
5369 if (!isNestedCapturedVar)
5370 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf,
5371 Context->getPointerType(Exp->getType()),
5372 VK_RValue, OK_Ordinary, SourceLocation(),
5373 false);
5374 Exp = NoTypeInfoCStyleCastExpr(Context, castT, CK_BitCast, Exp);
5375 InitExprs.push_back(Exp);
5376 }
5377 }
5378 if (ImportedBlockDecls.size()) {
5379 // generate BLOCK_HAS_COPY_DISPOSE(have helper funcs) | BLOCK_HAS_DESCRIPTOR
5380 int flag = (BLOCK_HAS_COPY_DISPOSE | BLOCK_HAS_DESCRIPTOR);
5381 unsigned IntSize =
5382 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
5383 Expr *FlagExp = IntegerLiteral::Create(*Context, llvm::APInt(IntSize, flag),
5384 Context->IntTy, SourceLocation());
5385 InitExprs.push_back(FlagExp);
5386 }
5387 NewRep = CallExpr::Create(*Context, DRE, InitExprs, FType, VK_LValue,
5388 SourceLocation());
5389
5390 if (GlobalBlockExpr) {
5391 assert (!GlobalConstructionExp &&((!GlobalConstructionExp && "SynthBlockInitExpr - GlobalConstructionExp must be null"
) ? static_cast<void> (0) : __assert_fail ("!GlobalConstructionExp && \"SynthBlockInitExpr - GlobalConstructionExp must be null\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5392, __PRETTY_FUNCTION__))
5392 "SynthBlockInitExpr - GlobalConstructionExp must be null")((!GlobalConstructionExp && "SynthBlockInitExpr - GlobalConstructionExp must be null"
) ? static_cast<void> (0) : __assert_fail ("!GlobalConstructionExp && \"SynthBlockInitExpr - GlobalConstructionExp must be null\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5392, __PRETTY_FUNCTION__))
;
5393 GlobalConstructionExp = NewRep;
5394 NewRep = DRE;
5395 }
5396
5397 NewRep = new (Context) UnaryOperator(NewRep, UO_AddrOf,
5398 Context->getPointerType(NewRep->getType()),
5399 VK_RValue, OK_Ordinary, SourceLocation(), false);
5400 NewRep = NoTypeInfoCStyleCastExpr(Context, FType, CK_BitCast,
5401 NewRep);
5402 // Put Paren around the call.
5403 NewRep = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
5404 NewRep);
5405
5406 BlockDeclRefs.clear();
5407 BlockByRefDecls.clear();
5408 BlockByRefDeclsPtrSet.clear();
5409 BlockByCopyDecls.clear();
5410 BlockByCopyDeclsPtrSet.clear();
5411 ImportedBlockDecls.clear();
5412 return NewRep;
5413}
5414
5415bool RewriteModernObjC::IsDeclStmtInForeachHeader(DeclStmt *DS) {
5416 if (const ObjCForCollectionStmt * CS =
5417 dyn_cast<ObjCForCollectionStmt>(Stmts.back()))
5418 return CS->getElement() == DS;
5419 return false;
5420}
5421
5422//===----------------------------------------------------------------------===//
5423// Function Body / Expression rewriting
5424//===----------------------------------------------------------------------===//
5425
5426Stmt *RewriteModernObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
5427 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
5428 isa<DoStmt>(S) || isa<ForStmt>(S))
5429 Stmts.push_back(S);
5430 else if (isa<ObjCForCollectionStmt>(S)) {
5431 Stmts.push_back(S);
5432 ObjCBcLabelNo.push_back(++BcLabelCount);
5433 }
5434
5435 // Pseudo-object operations and ivar references need special
5436 // treatment because we're going to recursively rewrite them.
5437 if (PseudoObjectExpr *PseudoOp = dyn_cast<PseudoObjectExpr>(S)) {
5438 if (isa<BinaryOperator>(PseudoOp->getSyntacticForm())) {
5439 return RewritePropertyOrImplicitSetter(PseudoOp);
5440 } else {
5441 return RewritePropertyOrImplicitGetter(PseudoOp);
5442 }
5443 } else if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(S)) {
5444 return RewriteObjCIvarRefExpr(IvarRefExpr);
5445 }
5446 else if (isa<OpaqueValueExpr>(S))
5447 S = cast<OpaqueValueExpr>(S)->getSourceExpr();
5448
5449 SourceRange OrigStmtRange = S->getSourceRange();
5450
5451 // Perform a bottom up rewrite of all children.
5452 for (Stmt *&childStmt : S->children())
5453 if (childStmt) {
5454 Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(childStmt);
5455 if (newStmt) {
5456 childStmt = newStmt;
5457 }
5458 }
5459
5460 if (BlockExpr *BE = dyn_cast<BlockExpr>(S)) {
5461 SmallVector<DeclRefExpr *, 8> InnerBlockDeclRefs;
5462 llvm::SmallPtrSet<const DeclContext *, 8> InnerContexts;
5463 InnerContexts.insert(BE->getBlockDecl());
5464 ImportedLocalExternalDecls.clear();
5465 GetInnerBlockDeclRefExprs(BE->getBody(),
5466 InnerBlockDeclRefs, InnerContexts);
5467 // Rewrite the block body in place.
5468 Stmt *SaveCurrentBody = CurrentBody;
5469 CurrentBody = BE->getBody();
5470 PropParentMap = nullptr;
5471 // block literal on rhs of a property-dot-sytax assignment
5472 // must be replaced by its synthesize ast so getRewrittenText
5473 // works as expected. In this case, what actually ends up on RHS
5474 // is the blockTranscribed which is the helper function for the
5475 // block literal; as in: self.c = ^() {[ace ARR];};
5476 bool saveDisableReplaceStmt = DisableReplaceStmt;
5477 DisableReplaceStmt = false;
5478 RewriteFunctionBodyOrGlobalInitializer(BE->getBody());
5479 DisableReplaceStmt = saveDisableReplaceStmt;
5480 CurrentBody = SaveCurrentBody;
5481 PropParentMap = nullptr;
5482 ImportedLocalExternalDecls.clear();
5483 // Now we snarf the rewritten text and stash it away for later use.
5484 std::string Str = Rewrite.getRewrittenText(BE->getSourceRange());
5485 RewrittenBlockExprs[BE] = Str;
5486
5487 Stmt *blockTranscribed = SynthBlockInitExpr(BE, InnerBlockDeclRefs);
5488
5489 //blockTranscribed->dump();
5490 ReplaceStmt(S, blockTranscribed);
5491 return blockTranscribed;
5492 }
5493 // Handle specific things.
5494 if (ObjCEncodeExpr *AtEncode = dyn_cast<ObjCEncodeExpr>(S))
5495 return RewriteAtEncode(AtEncode);
5496
5497 if (ObjCSelectorExpr *AtSelector = dyn_cast<ObjCSelectorExpr>(S))
5498 return RewriteAtSelector(AtSelector);
5499
5500 if (ObjCStringLiteral *AtString = dyn_cast<ObjCStringLiteral>(S))
5501 return RewriteObjCStringLiteral(AtString);
5502
5503 if (ObjCBoolLiteralExpr *BoolLitExpr = dyn_cast<ObjCBoolLiteralExpr>(S))
5504 return RewriteObjCBoolLiteralExpr(BoolLitExpr);
5505
5506 if (ObjCBoxedExpr *BoxedExpr = dyn_cast<ObjCBoxedExpr>(S))
5507 return RewriteObjCBoxedExpr(BoxedExpr);
5508
5509 if (ObjCArrayLiteral *ArrayLitExpr = dyn_cast<ObjCArrayLiteral>(S))
5510 return RewriteObjCArrayLiteralExpr(ArrayLitExpr);
5511
5512 if (ObjCDictionaryLiteral *DictionaryLitExpr =
5513 dyn_cast<ObjCDictionaryLiteral>(S))
5514 return RewriteObjCDictionaryLiteralExpr(DictionaryLitExpr);
5515
5516 if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(S)) {
5517#if 0
5518 // Before we rewrite it, put the original message expression in a comment.
5519 SourceLocation startLoc = MessExpr->getBeginLoc();
5520 SourceLocation endLoc = MessExpr->getEndLoc();
5521
5522 const char *startBuf = SM->getCharacterData(startLoc);
5523 const char *endBuf = SM->getCharacterData(endLoc);
5524
5525 std::string messString;
5526 messString += "// ";
5527 messString.append(startBuf, endBuf-startBuf+1);
5528 messString += "\n";
5529
5530 // FIXME: Missing definition of
5531 // InsertText(clang::SourceLocation, char const*, unsigned int).
5532 // InsertText(startLoc, messString);
5533 // Tried this, but it didn't work either...
5534 // ReplaceText(startLoc, 0, messString.c_str(), messString.size());
5535#endif
5536 return RewriteMessageExpr(MessExpr);
5537 }
5538
5539 if (ObjCAutoreleasePoolStmt *StmtAutoRelease =
5540 dyn_cast<ObjCAutoreleasePoolStmt>(S)) {
5541 return RewriteObjCAutoreleasePoolStmt(StmtAutoRelease);
5542 }
5543
5544 if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(S))
5545 return RewriteObjCTryStmt(StmtTry);
5546
5547 if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(S))
5548 return RewriteObjCSynchronizedStmt(StmtTry);
5549
5550 if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(S))
5551 return RewriteObjCThrowStmt(StmtThrow);
5552
5553 if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(S))
5554 return RewriteObjCProtocolExpr(ProtocolExp);
5555
5556 if (ObjCForCollectionStmt *StmtForCollection =
5557 dyn_cast<ObjCForCollectionStmt>(S))
5558 return RewriteObjCForCollectionStmt(StmtForCollection,
5559 OrigStmtRange.getEnd());
5560 if (BreakStmt *StmtBreakStmt =
5561 dyn_cast<BreakStmt>(S))
5562 return RewriteBreakStmt(StmtBreakStmt);
5563 if (ContinueStmt *StmtContinueStmt =
5564 dyn_cast<ContinueStmt>(S))
5565 return RewriteContinueStmt(StmtContinueStmt);
5566
5567 // Need to check for protocol refs (id <P>, Foo <P> *) in variable decls
5568 // and cast exprs.
5569 if (DeclStmt *DS = dyn_cast<DeclStmt>(S)) {
5570 // FIXME: What we're doing here is modifying the type-specifier that
5571 // precedes the first Decl. In the future the DeclGroup should have
5572 // a separate type-specifier that we can rewrite.
5573 // NOTE: We need to avoid rewriting the DeclStmt if it is within
5574 // the context of an ObjCForCollectionStmt. For example:
5575 // NSArray *someArray;
5576 // for (id <FooProtocol> index in someArray) ;
5577 // This is because RewriteObjCForCollectionStmt() does textual rewriting
5578 // and it depends on the original text locations/positions.
5579 if (Stmts.empty() || !IsDeclStmtInForeachHeader(DS))
5580 RewriteObjCQualifiedInterfaceTypes(*DS->decl_begin());
5581
5582 // Blocks rewrite rules.
5583 for (DeclStmt::decl_iterator DI = DS->decl_begin(), DE = DS->decl_end();
5584 DI != DE; ++DI) {
5585 Decl *SD = *DI;
5586 if (ValueDecl *ND = dyn_cast<ValueDecl>(SD)) {
5587 if (isTopLevelBlockPointerType(ND->getType()))
5588 RewriteBlockPointerDecl(ND);
5589 else if (ND->getType()->isFunctionPointerType())
5590 CheckFunctionPointerDecl(ND->getType(), ND);
5591 if (VarDecl *VD = dyn_cast<VarDecl>(SD)) {
5592 if (VD->hasAttr<BlocksAttr>()) {
5593 static unsigned uniqueByrefDeclCount = 0;
5594 assert(!BlockByRefDeclNo.count(ND) &&((!BlockByRefDeclNo.count(ND) && "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl"
) ? static_cast<void> (0) : __assert_fail ("!BlockByRefDeclNo.count(ND) && \"RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5595, __PRETTY_FUNCTION__))
5595 "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl")((!BlockByRefDeclNo.count(ND) && "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl"
) ? static_cast<void> (0) : __assert_fail ("!BlockByRefDeclNo.count(ND) && \"RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5595, __PRETTY_FUNCTION__))
;
5596 BlockByRefDeclNo[ND] = uniqueByrefDeclCount++;
5597 RewriteByRefVar(VD, (DI == DS->decl_begin()), ((DI+1) == DE));
5598 }
5599 else
5600 RewriteTypeOfDecl(VD);
5601 }
5602 }
5603 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(SD)) {
5604 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
5605 RewriteBlockPointerDecl(TD);
5606 else if (TD->getUnderlyingType()->isFunctionPointerType())
5607 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
5608 }
5609 }
5610 }
5611
5612 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S))
5613 RewriteObjCQualifiedInterfaceTypes(CE);
5614
5615 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
5616 isa<DoStmt>(S) || isa<ForStmt>(S)) {
5617 assert(!Stmts.empty() && "Statement stack is empty")((!Stmts.empty() && "Statement stack is empty") ? static_cast
<void> (0) : __assert_fail ("!Stmts.empty() && \"Statement stack is empty\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5617, __PRETTY_FUNCTION__))
;
5618 assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) ||(((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>
(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt
>(Stmts.back())) && "Statement stack mismatch") ? static_cast
<void> (0) : __assert_fail ("(isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back())) && \"Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5620, __PRETTY_FUNCTION__))
5619 isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back()))(((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>
(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt
>(Stmts.back())) && "Statement stack mismatch") ? static_cast
<void> (0) : __assert_fail ("(isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back())) && \"Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5620, __PRETTY_FUNCTION__))
5620 && "Statement stack mismatch")(((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>
(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt
>(Stmts.back())) && "Statement stack mismatch") ? static_cast
<void> (0) : __assert_fail ("(isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back())) && \"Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5620, __PRETTY_FUNCTION__))
;
5621 Stmts.pop_back();
5622 }
5623 // Handle blocks rewriting.
5624 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
5625 ValueDecl *VD = DRE->getDecl();
5626 if (VD->hasAttr<BlocksAttr>())
5627 return RewriteBlockDeclRefExpr(DRE);
5628 if (HasLocalVariableExternalStorage(VD))
5629 return RewriteLocalVariableExternalStorage(DRE);
5630 }
5631
5632 if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
5633 if (CE->getCallee()->getType()->isBlockPointerType()) {
5634 Stmt *BlockCall = SynthesizeBlockCall(CE, CE->getCallee());
5635 ReplaceStmt(S, BlockCall);
5636 return BlockCall;
5637 }
5638 }
5639 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S)) {
5640 RewriteCastExpr(CE);
5641 }
5642 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
5643 RewriteImplicitCastObjCExpr(ICE);
5644 }
5645#if 0
5646
5647 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
5648 CastExpr *Replacement = new (Context) CastExpr(ICE->getType(),
5649 ICE->getSubExpr(),
5650 SourceLocation());
5651 // Get the new text.
5652 std::string SStr;
5653 llvm::raw_string_ostream Buf(SStr);
5654 Replacement->printPretty(Buf);
5655 const std::string &Str = Buf.str();
5656
5657 printf("CAST = %s\n", &Str[0]);
5658 InsertText(ICE->getSubExpr()->getBeginLoc(), Str);
5659 delete S;
5660 return Replacement;
5661 }
5662#endif
5663 // Return this stmt unmodified.
5664 return S;
5665}
5666
5667void RewriteModernObjC::RewriteRecordBody(RecordDecl *RD) {
5668 for (auto *FD : RD->fields()) {
5669 if (isTopLevelBlockPointerType(FD->getType()))
5670 RewriteBlockPointerDecl(FD);
5671 if (FD->getType()->isObjCQualifiedIdType() ||
5672 FD->getType()->isObjCQualifiedInterfaceType())
5673 RewriteObjCQualifiedInterfaceTypes(FD);
5674 }
5675}
5676
5677/// HandleDeclInMainFile - This is called for each top-level decl defined in the
5678/// main file of the input.
5679void RewriteModernObjC::HandleDeclInMainFile(Decl *D) {
5680 switch (D->getKind()) {
5681 case Decl::Function: {
5682 FunctionDecl *FD = cast<FunctionDecl>(D);
5683 if (FD->isOverloadedOperator())
5684 return;
5685
5686 // Since function prototypes don't have ParmDecl's, we check the function
5687 // prototype. This enables us to rewrite function declarations and
5688 // definitions using the same code.
5689 RewriteBlocksInFunctionProtoType(FD->getType(), FD);
5690
5691 if (!FD->isThisDeclarationADefinition())
5692 break;
5693
5694 // FIXME: If this should support Obj-C++, support CXXTryStmt
5695 if (CompoundStmt *Body = dyn_cast_or_null<CompoundStmt>(FD->getBody())) {
5696 CurFunctionDef = FD;
5697 CurrentBody = Body;
5698 Body =
5699 cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
5700 FD->setBody(Body);
5701 CurrentBody = nullptr;
5702 if (PropParentMap) {
5703 delete PropParentMap;
5704 PropParentMap = nullptr;
5705 }
5706 // This synthesizes and inserts the block "impl" struct, invoke function,
5707 // and any copy/dispose helper functions.
5708 InsertBlockLiteralsWithinFunction(FD);
5709 RewriteLineDirective(D);
5710 CurFunctionDef = nullptr;
5711 }
5712 break;
5713 }
5714 case Decl::ObjCMethod: {
5715 ObjCMethodDecl *MD = cast<ObjCMethodDecl>(D);
5716 if (CompoundStmt *Body = MD->getCompoundBody()) {
5717 CurMethodDef = MD;
5718 CurrentBody = Body;
5719 Body =
5720 cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
5721 MD->setBody(Body);
5722 CurrentBody = nullptr;
5723 if (PropParentMap) {
5724 delete PropParentMap;
5725 PropParentMap = nullptr;
5726 }
5727 InsertBlockLiteralsWithinMethod(MD);
5728 RewriteLineDirective(D);
5729 CurMethodDef = nullptr;
5730 }
5731 break;
5732 }
5733 case Decl::ObjCImplementation: {
5734 ObjCImplementationDecl *CI = cast<ObjCImplementationDecl>(D);
5735 ClassImplementation.push_back(CI);
5736 break;
5737 }
5738 case Decl::ObjCCategoryImpl: {
5739 ObjCCategoryImplDecl *CI = cast<ObjCCategoryImplDecl>(D);
5740 CategoryImplementation.push_back(CI);
5741 break;
5742 }
5743 case Decl::Var: {
5744 VarDecl *VD = cast<VarDecl>(D);
5745 RewriteObjCQualifiedInterfaceTypes(VD);
5746 if (isTopLevelBlockPointerType(VD->getType()))
5747 RewriteBlockPointerDecl(VD);
5748 else if (VD->getType()->isFunctionPointerType()) {
5749 CheckFunctionPointerDecl(VD->getType(), VD);
5750 if (VD->getInit()) {
5751 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
5752 RewriteCastExpr(CE);
5753 }
5754 }
5755 } else if (VD->getType()->isRecordType()) {
5756 RecordDecl *RD = VD->getType()->getAs<RecordType>()->getDecl();
5757 if (RD->isCompleteDefinition())
5758 RewriteRecordBody(RD);
5759 }
5760 if (VD->getInit()) {
5761 GlobalVarDecl = VD;
5762 CurrentBody = VD->getInit();
5763 RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
5764 CurrentBody = nullptr;
5765 if (PropParentMap) {
5766 delete PropParentMap;
5767 PropParentMap = nullptr;
5768 }
5769 SynthesizeBlockLiterals(VD->getTypeSpecStartLoc(), VD->getName());
5770 GlobalVarDecl = nullptr;
5771
5772 // This is needed for blocks.
5773 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
5774 RewriteCastExpr(CE);
5775 }
5776 }
5777 break;
5778 }
5779 case Decl::TypeAlias:
5780 case Decl::Typedef: {
5781 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
5782 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
5783 RewriteBlockPointerDecl(TD);
5784 else if (TD->getUnderlyingType()->isFunctionPointerType())
5785 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
5786 else
5787 RewriteObjCQualifiedInterfaceTypes(TD);
5788 }
5789 break;
5790 }
5791 case Decl::CXXRecord:
5792 case Decl::Record: {
5793 RecordDecl *RD = cast<RecordDecl>(D);
5794 if (RD->isCompleteDefinition())
5795 RewriteRecordBody(RD);
5796 break;
5797 }
5798 default:
5799 break;
5800 }
5801 // Nothing yet.
5802}
5803
5804/// Write_ProtocolExprReferencedMetadata - This routine writer out the
5805/// protocol reference symbols in the for of:
5806/// struct _protocol_t *PROTOCOL_REF = &PROTOCOL_METADATA.
5807static void Write_ProtocolExprReferencedMetadata(ASTContext *Context,
5808 ObjCProtocolDecl *PDecl,
5809 std::string &Result) {
5810 // Also output .objc_protorefs$B section and its meta-data.
5811 if (Context->getLangOpts().MicrosoftExt)
5812 Result += "static ";
5813 Result += "struct _protocol_t *";
5814 Result += "_OBJC_PROTOCOL_REFERENCE_$_";
5815 Result += PDecl->getNameAsString();
5816 Result += " = &";
5817 Result += "_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
5818 Result += ";\n";
5819}
5820
5821void RewriteModernObjC::HandleTranslationUnit(ASTContext &C) {
5822 if (Diags.hasErrorOccurred())
1
Assuming the condition is false
2
Taking false branch
5823 return;
5824
5825 RewriteInclude();
5826
5827 for (unsigned i = 0, e = FunctionDefinitionsSeen.size(); i < e; i++) {
3
Assuming 'i' is >= 'e'
4
Loop condition is false. Execution continues on line 5837
5828 // translation of function bodies were postponed until all class and
5829 // their extensions and implementations are seen. This is because, we
5830 // cannot build grouping structs for bitfields until they are all seen.
5831 FunctionDecl *FDecl = FunctionDefinitionsSeen[i];
5832 HandleTopLevelSingleDecl(FDecl);
5833 }
5834
5835 // Here's a great place to add any extra declarations that may be needed.
5836 // Write out meta data for each @protocol(<expr>).
5837 for (ObjCProtocolDecl *ProtDecl : ProtocolExprDecls) {
5838 RewriteObjCProtocolMetaData(ProtDecl, Preamble);
5839 Write_ProtocolExprReferencedMetadata(Context, ProtDecl, Preamble);
5840 }
5841
5842 InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
5843
5844 if (ClassImplementation.size() || CategoryImplementation.size())
5
Assuming the condition is false
6
Assuming the condition is false
7
Taking false branch
5845 RewriteImplementations();
5846
5847 for (unsigned i = 0, e = ObjCInterfacesSeen.size(); i < e; i++) {
8
Assuming 'i' is < 'e'
9
Loop condition is true. Entering loop body
5848 ObjCInterfaceDecl *CDecl = ObjCInterfacesSeen[i];
5849 // Write struct declaration for the class matching its ivar declarations.
5850 // Note that for modern abi, this is postponed until the end of TU
5851 // because class extensions and the implementation might declare their own
5852 // private ivars.
5853 RewriteInterfaceDecl(CDecl);
10
Calling 'RewriteModernObjC::RewriteInterfaceDecl'
5854 }
5855
5856 // Get the buffer corresponding to MainFileID. If we haven't changed it, then
5857 // we are done.
5858 if (const RewriteBuffer *RewriteBuf =
5859 Rewrite.getRewriteBufferFor(MainFileID)) {
5860 //printf("Changed:\n");
5861 *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
5862 } else {
5863 llvm::errs() << "No changes\n";
5864 }
5865
5866 if (ClassImplementation.size() || CategoryImplementation.size() ||
5867 ProtocolExprDecls.size()) {
5868 // Rewrite Objective-c meta data*
5869 std::string ResultStr;
5870 RewriteMetaDataIntoBuffer(ResultStr);
5871 // Emit metadata.
5872 *OutFile << ResultStr;
5873 }
5874 // Emit ImageInfo;
5875 {
5876 std::string ResultStr;
5877 WriteImageInfo(ResultStr);
5878 *OutFile << ResultStr;
5879 }
5880 OutFile->flush();
5881}
5882
5883void RewriteModernObjC::Initialize(ASTContext &context) {
5884 InitializeCommon(context);
5885
5886 Preamble += "#ifndef __OBJC2__\n";
5887 Preamble += "#define __OBJC2__\n";
5888 Preamble += "#endif\n";
5889
5890 // declaring objc_selector outside the parameter list removes a silly
5891 // scope related warning...
5892 if (IsHeader)
5893 Preamble = "#pragma once\n";
5894 Preamble += "struct objc_selector; struct objc_class;\n";
5895 Preamble += "struct __rw_objc_super { \n\tstruct objc_object *object; ";
5896 Preamble += "\n\tstruct objc_object *superClass; ";
5897 // Add a constructor for creating temporary objects.
5898 Preamble += "\n\t__rw_objc_super(struct objc_object *o, struct objc_object *s) ";
5899 Preamble += ": object(o), superClass(s) {} ";
5900 Preamble += "\n};\n";
5901
5902 if (LangOpts.MicrosoftExt) {
5903 // Define all sections using syntax that makes sense.
5904 // These are currently generated.
5905 Preamble += "\n#pragma section(\".objc_classlist$B\", long, read, write)\n";
5906 Preamble += "#pragma section(\".objc_catlist$B\", long, read, write)\n";
5907 Preamble += "#pragma section(\".objc_imageinfo$B\", long, read, write)\n";
5908 Preamble += "#pragma section(\".objc_nlclslist$B\", long, read, write)\n";
5909 Preamble += "#pragma section(\".objc_nlcatlist$B\", long, read, write)\n";
5910 // These are generated but not necessary for functionality.
5911 Preamble += "#pragma section(\".cat_cls_meth$B\", long, read, write)\n";
5912 Preamble += "#pragma section(\".inst_meth$B\", long, read, write)\n";
5913 Preamble += "#pragma section(\".cls_meth$B\", long, read, write)\n";
5914 Preamble += "#pragma section(\".objc_ivar$B\", long, read, write)\n";
5915
5916 // These need be generated for performance. Currently they are not,
5917 // using API calls instead.
5918 Preamble += "#pragma section(\".objc_selrefs$B\", long, read, write)\n";
5919 Preamble += "#pragma section(\".objc_classrefs$B\", long, read, write)\n";
5920 Preamble += "#pragma section(\".objc_superrefs$B\", long, read, write)\n";
5921
5922 }
5923 Preamble += "#ifndef _REWRITER_typedef_Protocol\n";
5924 Preamble += "typedef struct objc_object Protocol;\n";
5925 Preamble += "#define _REWRITER_typedef_Protocol\n";
5926 Preamble += "#endif\n";
5927 if (LangOpts.MicrosoftExt) {
5928 Preamble += "#define __OBJC_RW_DLLIMPORT extern \"C\" __declspec(dllimport)\n";
5929 Preamble += "#define __OBJC_RW_STATICIMPORT extern \"C\"\n";
5930 }
5931 else
5932 Preamble += "#define __OBJC_RW_DLLIMPORT extern\n";
5933
5934 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend(void);\n";
5935 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper(void);\n";
5936 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_stret(void);\n";
5937 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper_stret(void);\n";
5938 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_fpret(void);\n";
5939
5940 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *objc_getClass";
5941 Preamble += "(const char *);\n";
5942 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *class_getSuperclass";
5943 Preamble += "(struct objc_class *);\n";
5944 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *objc_getMetaClass";
5945 Preamble += "(const char *);\n";
5946 Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw( struct objc_object *);\n";
5947 // @synchronized hooks.
5948 Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_enter( struct objc_object *);\n";
5949 Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_exit( struct objc_object *);\n";
5950 Preamble += "__OBJC_RW_DLLIMPORT Protocol *objc_getProtocol(const char *);\n";
5951 Preamble += "#ifdef _WIN64\n";
5952 Preamble += "typedef unsigned long long _WIN_NSUInteger;\n";
5953 Preamble += "#else\n";
5954 Preamble += "typedef unsigned int _WIN_NSUInteger;\n";
5955 Preamble += "#endif\n";
5956 Preamble += "#ifndef __FASTENUMERATIONSTATE\n";
5957 Preamble += "struct __objcFastEnumerationState {\n\t";
5958 Preamble += "unsigned long state;\n\t";
5959 Preamble += "void **itemsPtr;\n\t";
5960 Preamble += "unsigned long *mutationsPtr;\n\t";
5961 Preamble += "unsigned long extra[5];\n};\n";
5962 Preamble += "__OBJC_RW_DLLIMPORT void objc_enumerationMutation(struct objc_object *);\n";
5963 Preamble += "#define __FASTENUMERATIONSTATE\n";
5964 Preamble += "#endif\n";
5965 Preamble += "#ifndef __NSCONSTANTSTRINGIMPL\n";
5966 Preamble += "struct __NSConstantStringImpl {\n";
5967 Preamble += " int *isa;\n";
5968 Preamble += " int flags;\n";
5969 Preamble += " char *str;\n";
5970 Preamble += "#if _WIN64\n";
5971 Preamble += " long long length;\n";
5972 Preamble += "#else\n";
5973 Preamble += " long length;\n";
5974 Preamble += "#endif\n";
5975 Preamble += "};\n";
5976 Preamble += "#ifdef CF_EXPORT_CONSTANT_STRING\n";
5977 Preamble += "extern \"C\" __declspec(dllexport) int __CFConstantStringClassReference[];\n";
5978 Preamble += "#else\n";
5979 Preamble += "__OBJC_RW_DLLIMPORT int __CFConstantStringClassReference[];\n";
5980 Preamble += "#endif\n";
5981 Preamble += "#define __NSCONSTANTSTRINGIMPL\n";
5982 Preamble += "#endif\n";
5983 // Blocks preamble.
5984 Preamble += "#ifndef BLOCK_IMPL\n";
5985 Preamble += "#define BLOCK_IMPL\n";
5986 Preamble += "struct __block_impl {\n";
5987 Preamble += " void *isa;\n";
5988 Preamble += " int Flags;\n";
5989 Preamble += " int Reserved;\n";
5990 Preamble += " void *FuncPtr;\n";
5991 Preamble += "};\n";
5992 Preamble += "// Runtime copy/destroy helper functions (from Block_private.h)\n";
5993 Preamble += "#ifdef __OBJC_EXPORT_BLOCKS\n";
5994 Preamble += "extern \"C\" __declspec(dllexport) "
5995 "void _Block_object_assign(void *, const void *, const int);\n";
5996 Preamble += "extern \"C\" __declspec(dllexport) void _Block_object_dispose(const void *, const int);\n";
5997 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteGlobalBlock[32];\n";
5998 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteStackBlock[32];\n";
5999 Preamble += "#else\n";
6000 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_assign(void *, const void *, const int);\n";
6001 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_dispose(const void *, const int);\n";
6002 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteGlobalBlock[32];\n";
6003 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteStackBlock[32];\n";
6004 Preamble += "#endif\n";
6005 Preamble += "#endif\n";
6006 if (LangOpts.MicrosoftExt) {
6007 Preamble += "#undef __OBJC_RW_DLLIMPORT\n";
6008 Preamble += "#undef __OBJC_RW_STATICIMPORT\n";
6009 Preamble += "#ifndef KEEP_ATTRIBUTES\n"; // We use this for clang tests.
6010 Preamble += "#define __attribute__(X)\n";
6011 Preamble += "#endif\n";
6012 Preamble += "#ifndef __weak\n";
6013 Preamble += "#define __weak\n";
6014 Preamble += "#endif\n";
6015 Preamble += "#ifndef __block\n";
6016 Preamble += "#define __block\n";
6017 Preamble += "#endif\n";
6018 }
6019 else {
6020 Preamble += "#define __block\n";
6021 Preamble += "#define __weak\n";
6022 }
6023
6024 // Declarations required for modern objective-c array and dictionary literals.
6025 Preamble += "\n#include <stdarg.h>\n";
6026 Preamble += "struct __NSContainer_literal {\n";
6027 Preamble += " void * *arr;\n";
6028 Preamble += " __NSContainer_literal (unsigned int count, ...) {\n";
6029 Preamble += "\tva_list marker;\n";
6030 Preamble += "\tva_start(marker, count);\n";
6031 Preamble += "\tarr = new void *[count];\n";
6032 Preamble += "\tfor (unsigned i = 0; i < count; i++)\n";
6033 Preamble += "\t arr[i] = va_arg(marker, void *);\n";
6034 Preamble += "\tva_end( marker );\n";
6035 Preamble += " };\n";
6036 Preamble += " ~__NSContainer_literal() {\n";
6037 Preamble += "\tdelete[] arr;\n";
6038 Preamble += " }\n";
6039 Preamble += "};\n";
6040
6041 // Declaration required for implementation of @autoreleasepool statement.
6042 Preamble += "extern \"C\" __declspec(dllimport) void * objc_autoreleasePoolPush(void);\n";
6043 Preamble += "extern \"C\" __declspec(dllimport) void objc_autoreleasePoolPop(void *);\n\n";
6044 Preamble += "struct __AtAutoreleasePool {\n";
6045 Preamble += " __AtAutoreleasePool() {atautoreleasepoolobj = objc_autoreleasePoolPush();}\n";
6046 Preamble += " ~__AtAutoreleasePool() {objc_autoreleasePoolPop(atautoreleasepoolobj);}\n";
6047 Preamble += " void * atautoreleasepoolobj;\n";
6048 Preamble += "};\n";
6049
6050 // NOTE! Windows uses LLP64 for 64bit mode. So, cast pointer to long long
6051 // as this avoids warning in any 64bit/32bit compilation model.
6052 Preamble += "\n#define __OFFSETOFIVAR__(TYPE, MEMBER) ((long long) &((TYPE *)0)->MEMBER)\n";
6053}
6054
6055/// RewriteIvarOffsetComputation - This routine synthesizes computation of
6056/// ivar offset.
6057void RewriteModernObjC::RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
6058 std::string &Result) {
6059 Result += "__OFFSETOFIVAR__(struct ";
6060 Result += ivar->getContainingInterface()->getNameAsString();
6061 if (LangOpts.MicrosoftExt)
6062 Result += "_IMPL";
6063 Result += ", ";
6064 if (ivar->isBitField())
6065 ObjCIvarBitfieldGroupDecl(ivar, Result);
6066 else
6067 Result += ivar->getNameAsString();
6068 Result += ")";
6069}
6070
6071/// WriteModernMetadataDeclarations - Writes out metadata declarations for modern ABI.
6072/// struct _prop_t {
6073/// const char *name;
6074/// char *attributes;
6075/// }
6076
6077/// struct _prop_list_t {
6078/// uint32_t entsize; // sizeof(struct _prop_t)
6079/// uint32_t count_of_properties;
6080/// struct _prop_t prop_list[count_of_properties];
6081/// }
6082
6083/// struct _protocol_t;
6084
6085/// struct _protocol_list_t {
6086/// long protocol_count; // Note, this is 32/64 bit
6087/// struct _protocol_t * protocol_list[protocol_count];
6088/// }
6089
6090/// struct _objc_method {
6091/// SEL _cmd;
6092/// const char *method_type;
6093/// char *_imp;
6094/// }
6095
6096/// struct _method_list_t {
6097/// uint32_t entsize; // sizeof(struct _objc_method)
6098/// uint32_t method_count;
6099/// struct _objc_method method_list[method_count];
6100/// }
6101
6102/// struct _protocol_t {
6103/// id isa; // NULL
6104/// const char *protocol_name;
6105/// const struct _protocol_list_t * protocol_list; // super protocols
6106/// const struct method_list_t *instance_methods;
6107/// const struct method_list_t *class_methods;
6108/// const struct method_list_t *optionalInstanceMethods;
6109/// const struct method_list_t *optionalClassMethods;
6110/// const struct _prop_list_t * properties;
6111/// const uint32_t size; // sizeof(struct _protocol_t)
6112/// const uint32_t flags; // = 0
6113/// const char ** extendedMethodTypes;
6114/// }
6115
6116/// struct _ivar_t {
6117/// unsigned long int *offset; // pointer to ivar offset location
6118/// const char *name;
6119/// const char *type;
6120/// uint32_t alignment;
6121/// uint32_t size;
6122/// }
6123
6124/// struct _ivar_list_t {
6125/// uint32 entsize; // sizeof(struct _ivar_t)
6126/// uint32 count;
6127/// struct _ivar_t list[count];
6128/// }
6129
6130/// struct _class_ro_t {
6131/// uint32_t flags;
6132/// uint32_t instanceStart;
6133/// uint32_t instanceSize;
6134/// uint32_t reserved; // only when building for 64bit targets
6135/// const uint8_t *ivarLayout;
6136/// const char *name;
6137/// const struct _method_list_t *baseMethods;
6138/// const struct _protocol_list_t *baseProtocols;
6139/// const struct _ivar_list_t *ivars;
6140/// const uint8_t *weakIvarLayout;
6141/// const struct _prop_list_t *properties;
6142/// }
6143
6144/// struct _class_t {
6145/// struct _class_t *isa;
6146/// struct _class_t *superclass;
6147/// void *cache;
6148/// IMP *vtable;
6149/// struct _class_ro_t *ro;
6150/// }
6151
6152/// struct _category_t {
6153/// const char *name;
6154/// struct _class_t *cls;
6155/// const struct _method_list_t *instance_methods;
6156/// const struct _method_list_t *class_methods;
6157/// const struct _protocol_list_t *protocols;
6158/// const struct _prop_list_t *properties;
6159/// }
6160
6161/// MessageRefTy - LLVM for:
6162/// struct _message_ref_t {
6163/// IMP messenger;
6164/// SEL name;
6165/// };
6166
6167/// SuperMessageRefTy - LLVM for:
6168/// struct _super_message_ref_t {
6169/// SUPER_IMP messenger;
6170/// SEL name;
6171/// };
6172
6173static void WriteModernMetadataDeclarations(ASTContext *Context, std::string &Result) {
6174 static bool meta_data_declared = false;
6175 if (meta_data_declared)
6176 return;
6177
6178 Result += "\nstruct _prop_t {\n";
6179 Result += "\tconst char *name;\n";
6180 Result += "\tconst char *attributes;\n";
6181 Result += "};\n";
6182
6183 Result += "\nstruct _protocol_t;\n";
6184
6185 Result += "\nstruct _objc_method {\n";
6186 Result += "\tstruct objc_selector * _cmd;\n";
6187 Result += "\tconst char *method_type;\n";
6188 Result += "\tvoid *_imp;\n";
6189 Result += "};\n";
6190
6191 Result += "\nstruct _protocol_t {\n";
6192 Result += "\tvoid * isa; // NULL\n";
6193 Result += "\tconst char *protocol_name;\n";
6194 Result += "\tconst struct _protocol_list_t * protocol_list; // super protocols\n";
6195 Result += "\tconst struct method_list_t *instance_methods;\n";
6196 Result += "\tconst struct method_list_t *class_methods;\n";
6197 Result += "\tconst struct method_list_t *optionalInstanceMethods;\n";
6198 Result += "\tconst struct method_list_t *optionalClassMethods;\n";
6199 Result += "\tconst struct _prop_list_t * properties;\n";
6200 Result += "\tconst unsigned int size; // sizeof(struct _protocol_t)\n";
6201 Result += "\tconst unsigned int flags; // = 0\n";
6202 Result += "\tconst char ** extendedMethodTypes;\n";
6203 Result += "};\n";
6204
6205 Result += "\nstruct _ivar_t {\n";
6206 Result += "\tunsigned long int *offset; // pointer to ivar offset location\n";
6207 Result += "\tconst char *name;\n";
6208 Result += "\tconst char *type;\n";
6209 Result += "\tunsigned int alignment;\n";
6210 Result += "\tunsigned int size;\n";
6211 Result += "};\n";
6212
6213 Result += "\nstruct _class_ro_t {\n";
6214 Result += "\tunsigned int flags;\n";
6215 Result += "\tunsigned int instanceStart;\n";
6216 Result += "\tunsigned int instanceSize;\n";
6217 const llvm::Triple &Triple(Context->getTargetInfo().getTriple());
6218 if (Triple.getArch() == llvm::Triple::x86_64)
6219 Result += "\tunsigned int reserved;\n";
6220 Result += "\tconst unsigned char *ivarLayout;\n";
6221 Result += "\tconst char *name;\n";
6222 Result += "\tconst struct _method_list_t *baseMethods;\n";
6223 Result += "\tconst struct _objc_protocol_list *baseProtocols;\n";
6224 Result += "\tconst struct _ivar_list_t *ivars;\n";
6225 Result += "\tconst unsigned char *weakIvarLayout;\n";
6226 Result += "\tconst struct _prop_list_t *properties;\n";
6227 Result += "};\n";
6228
6229 Result += "\nstruct _class_t {\n";
6230 Result += "\tstruct _class_t *isa;\n";
6231 Result += "\tstruct _class_t *superclass;\n";
6232 Result += "\tvoid *cache;\n";
6233 Result += "\tvoid *vtable;\n";
6234 Result += "\tstruct _class_ro_t *ro;\n";
6235 Result += "};\n";
6236
6237 Result += "\nstruct _category_t {\n";
6238 Result += "\tconst char *name;\n";
6239 Result += "\tstruct _class_t *cls;\n";
6240 Result += "\tconst struct _method_list_t *instance_methods;\n";
6241 Result += "\tconst struct _method_list_t *class_methods;\n";
6242 Result += "\tconst struct _protocol_list_t *protocols;\n";
6243 Result += "\tconst struct _prop_list_t *properties;\n";
6244 Result += "};\n";
6245
6246 Result += "extern \"C\" __declspec(dllimport) struct objc_cache _objc_empty_cache;\n";
6247 Result += "#pragma warning(disable:4273)\n";
6248 meta_data_declared = true;
6249}
6250
6251static void Write_protocol_list_t_TypeDecl(std::string &Result,
6252 long super_protocol_count) {
6253 Result += "struct /*_protocol_list_t*/"; Result += " {\n";
6254 Result += "\tlong protocol_count; // Note, this is 32/64 bit\n";
6255 Result += "\tstruct _protocol_t *super_protocols[";
6256 Result += utostr(super_protocol_count); Result += "];\n";
6257 Result += "}";
6258}
6259
6260static void Write_method_list_t_TypeDecl(std::string &Result,
6261 unsigned int method_count) {
6262 Result += "struct /*_method_list_t*/"; Result += " {\n";
6263 Result += "\tunsigned int entsize; // sizeof(struct _objc_method)\n";
6264 Result += "\tunsigned int method_count;\n";
6265 Result += "\tstruct _objc_method method_list[";
6266 Result += utostr(method_count); Result += "];\n";
6267 Result += "}";
6268}
6269
6270static void Write__prop_list_t_TypeDecl(std::string &Result,
6271 unsigned int property_count) {
6272 Result += "struct /*_prop_list_t*/"; Result += " {\n";
6273 Result += "\tunsigned int entsize; // sizeof(struct _prop_t)\n";
6274 Result += "\tunsigned int count_of_properties;\n";
6275 Result += "\tstruct _prop_t prop_list[";
6276 Result += utostr(property_count); Result += "];\n";
6277 Result += "}";
6278}
6279
6280static void Write__ivar_list_t_TypeDecl(std::string &Result,
6281 unsigned int ivar_count) {
6282 Result += "struct /*_ivar_list_t*/"; Result += " {\n";
6283 Result += "\tunsigned int entsize; // sizeof(struct _prop_t)\n";
6284 Result += "\tunsigned int count;\n";
6285 Result += "\tstruct _ivar_t ivar_list[";
6286 Result += utostr(ivar_count); Result += "];\n";
6287 Result += "}";
6288}
6289
6290static void Write_protocol_list_initializer(ASTContext *Context, std::string &Result,
6291 ArrayRef<ObjCProtocolDecl *> SuperProtocols,
6292 StringRef VarName,
6293 StringRef ProtocolName) {
6294 if (SuperProtocols.size() > 0) {
6295 Result += "\nstatic ";
6296 Write_protocol_list_t_TypeDecl(Result, SuperProtocols.size());
6297 Result += " "; Result += VarName;
6298 Result += ProtocolName;
6299 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6300 Result += "\t"; Result += utostr(SuperProtocols.size()); Result += ",\n";
6301 for (unsigned i = 0, e = SuperProtocols.size(); i < e; i++) {
6302 ObjCProtocolDecl *SuperPD = SuperProtocols[i];
6303 Result += "\t&"; Result += "_OBJC_PROTOCOL_";
6304 Result += SuperPD->getNameAsString();
6305 if (i == e-1)
6306 Result += "\n};\n";
6307 else
6308 Result += ",\n";
6309 }
6310 }
6311}
6312
6313static void Write_method_list_t_initializer(RewriteModernObjC &RewriteObj,
6314 ASTContext *Context, std::string &Result,
6315 ArrayRef<ObjCMethodDecl *> Methods,
6316 StringRef VarName,
6317 StringRef TopLevelDeclName,
6318 bool MethodImpl) {
6319 if (Methods.size() > 0) {
6320 Result += "\nstatic ";
6321 Write_method_list_t_TypeDecl(Result, Methods.size());
6322 Result += " "; Result += VarName;
6323 Result += TopLevelDeclName;
6324 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6325 Result += "\t"; Result += "sizeof(_objc_method)"; Result += ",\n";
6326 Result += "\t"; Result += utostr(Methods.size()); Result += ",\n";
6327 for (unsigned i = 0, e = Methods.size(); i < e; i++) {
6328 ObjCMethodDecl *MD = Methods[i];
6329 if (i == 0)
6330 Result += "\t{{(struct objc_selector *)\"";
6331 else
6332 Result += "\t{(struct objc_selector *)\"";
6333 Result += (MD)->getSelector().getAsString(); Result += "\"";
6334 Result += ", ";
6335 std::string MethodTypeString = Context->getObjCEncodingForMethodDecl(MD);
6336 Result += "\""; Result += MethodTypeString; Result += "\"";
6337 Result += ", ";
6338 if (!MethodImpl)
6339 Result += "0";
6340 else {
6341 Result += "(void *)";
6342 Result += RewriteObj.MethodInternalNames[MD];
6343 }
6344 if (i == e-1)
6345 Result += "}}\n";
6346 else
6347 Result += "},\n";
6348 }
6349 Result += "};\n";
6350 }
6351}
6352
6353static void Write_prop_list_t_initializer(RewriteModernObjC &RewriteObj,
6354 ASTContext *Context, std::string &Result,
6355 ArrayRef<ObjCPropertyDecl *> Properties,
6356 const Decl *Container,
6357 StringRef VarName,
6358 StringRef ProtocolName) {
6359 if (Properties.size() > 0) {
6360 Result += "\nstatic ";
6361 Write__prop_list_t_TypeDecl(Result, Properties.size());
6362 Result += " "; Result += VarName;
6363 Result += ProtocolName;
6364 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6365 Result += "\t"; Result += "sizeof(_prop_t)"; Result += ",\n";
6366 Result += "\t"; Result += utostr(Properties.size()); Result += ",\n";
6367 for (unsigned i = 0, e = Properties.size(); i < e; i++) {
6368 ObjCPropertyDecl *PropDecl = Properties[i];
6369 if (i == 0)
6370 Result += "\t{{\"";
6371 else
6372 Result += "\t{\"";
6373 Result += PropDecl->getName(); Result += "\",";
6374 std::string PropertyTypeString =
6375 Context->getObjCEncodingForPropertyDecl(PropDecl, Container);
6376 std::string QuotePropertyTypeString;
6377 RewriteObj.QuoteDoublequotes(PropertyTypeString, QuotePropertyTypeString);
6378 Result += "\""; Result += QuotePropertyTypeString; Result += "\"";
6379 if (i == e-1)
6380 Result += "}}\n";
6381 else
6382 Result += "},\n";
6383 }
6384 Result += "};\n";
6385 }
6386}
6387
6388// Metadata flags
6389enum MetaDataDlags {
6390 CLS = 0x0,
6391 CLS_META = 0x1,
6392 CLS_ROOT = 0x2,
6393 OBJC2_CLS_HIDDEN = 0x10,
6394 CLS_EXCEPTION = 0x20,
6395
6396 /// (Obsolete) ARC-specific: this class has a .release_ivars method
6397 CLS_HAS_IVAR_RELEASER = 0x40,
6398 /// class was compiled with -fobjc-arr
6399 CLS_COMPILED_BY_ARC = 0x80 // (1<<7)
6400};
6401
6402static void Write__class_ro_t_initializer(ASTContext *Context, std::string &Result,
6403 unsigned int flags,
6404 const std::string &InstanceStart,
6405 const std::string &InstanceSize,
6406 ArrayRef<ObjCMethodDecl *>baseMethods,
6407 ArrayRef<ObjCProtocolDecl *>baseProtocols,
6408 ArrayRef<ObjCIvarDecl *>ivars,
6409 ArrayRef<ObjCPropertyDecl *>Properties,
6410 StringRef VarName,
6411 StringRef ClassName) {
6412 Result += "\nstatic struct _class_ro_t ";
6413 Result += VarName; Result += ClassName;
6414 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6415 Result += "\t";
6416 Result += llvm::utostr(flags); Result += ", ";
6417 Result += InstanceStart; Result += ", ";
6418 Result += InstanceSize; Result += ", \n";
6419 Result += "\t";
6420 const llvm::Triple &Triple(Context->getTargetInfo().getTriple());
6421 if (Triple.getArch() == llvm::Triple::x86_64)
6422 // uint32_t const reserved; // only when building for 64bit targets
6423 Result += "(unsigned int)0, \n\t";
6424 // const uint8_t * const ivarLayout;
6425 Result += "0, \n\t";
6426 Result += "\""; Result += ClassName; Result += "\",\n\t";
6427 bool metaclass = ((flags & CLS_META) != 0);
6428 if (baseMethods.size() > 0) {
6429 Result += "(const struct _method_list_t *)&";
6430 if (metaclass)
6431 Result += "_OBJC_$_CLASS_METHODS_";
6432 else
6433 Result += "_OBJC_$_INSTANCE_METHODS_";
6434 Result += ClassName;
6435 Result += ",\n\t";
6436 }
6437 else
6438 Result += "0, \n\t";
6439
6440 if (!metaclass && baseProtocols.size() > 0) {
6441 Result += "(const struct _objc_protocol_list *)&";
6442 Result += "_OBJC_CLASS_PROTOCOLS_$_"; Result += ClassName;
6443 Result += ",\n\t";
6444 }
6445 else
6446 Result += "0, \n\t";
6447
6448 if (!metaclass && ivars.size() > 0) {
6449 Result += "(const struct _ivar_list_t *)&";
6450 Result += "_OBJC_$_INSTANCE_VARIABLES_"; Result += ClassName;
6451 Result += ",\n\t";
6452 }
6453 else
6454 Result += "0, \n\t";
6455
6456 // weakIvarLayout
6457 Result += "0, \n\t";
6458 if (!metaclass && Properties.size() > 0) {
6459 Result += "(const struct _prop_list_t *)&";
6460 Result += "_OBJC_$_PROP_LIST_"; Result += ClassName;
6461 Result += ",\n";
6462 }
6463 else
6464 Result += "0, \n";
6465
6466 Result += "};\n";
6467}
6468
6469static void Write_class_t(ASTContext *Context, std::string &Result,
6470 StringRef VarName,
6471 const ObjCInterfaceDecl *CDecl, bool metaclass) {
6472 bool rootClass = (!CDecl->getSuperClass());
6473 const ObjCInterfaceDecl *RootClass = CDecl;
6474
6475 if (!rootClass) {
6476 // Find the Root class
6477 RootClass = CDecl->getSuperClass();
6478 while (RootClass->getSuperClass()) {
6479 RootClass = RootClass->getSuperClass();
6480 }
6481 }
6482
6483 if (metaclass && rootClass) {
6484 // Need to handle a case of use of forward declaration.
6485 Result += "\n";
6486 Result += "extern \"C\" ";
6487 if (CDecl->getImplementation())
6488 Result += "__declspec(dllexport) ";
6489 else
6490 Result += "__declspec(dllimport) ";
6491
6492 Result += "struct _class_t OBJC_CLASS_$_";
6493 Result += CDecl->getNameAsString();
6494 Result += ";\n";
6495 }
6496 // Also, for possibility of 'super' metadata class not having been defined yet.
6497 if (!rootClass) {
6498 ObjCInterfaceDecl *SuperClass = CDecl->getSuperClass();
6499 Result += "\n";
6500 Result += "extern \"C\" ";
6501 if (SuperClass->getImplementation())
6502 Result += "__declspec(dllexport) ";
6503 else
6504 Result += "__declspec(dllimport) ";
6505
6506 Result += "struct _class_t ";
6507 Result += VarName;
6508 Result += SuperClass->getNameAsString();
6509 Result += ";\n";
6510
6511 if (metaclass && RootClass != SuperClass) {
6512 Result += "extern \"C\" ";
6513 if (RootClass->getImplementation())
6514 Result += "__declspec(dllexport) ";
6515 else
6516 Result += "__declspec(dllimport) ";
6517
6518 Result += "struct _class_t ";
6519 Result += VarName;
6520 Result += RootClass->getNameAsString();
6521 Result += ";\n";
6522 }
6523 }
6524
6525 Result += "\nextern \"C\" __declspec(dllexport) struct _class_t ";
6526 Result += VarName; Result += CDecl->getNameAsString();
6527 Result += " __attribute__ ((used, section (\"__DATA,__objc_data\"))) = {\n";
6528 Result += "\t";
6529 if (metaclass) {
6530 if (!rootClass) {
6531 Result += "0, // &"; Result += VarName;
6532 Result += RootClass->getNameAsString();
6533 Result += ",\n\t";
6534 Result += "0, // &"; Result += VarName;
6535 Result += CDecl->getSuperClass()->getNameAsString();
6536 Result += ",\n\t";
6537 }
6538 else {
6539 Result += "0, // &"; Result += VarName;
6540 Result += CDecl->getNameAsString();
6541 Result += ",\n\t";
6542 Result += "0, // &OBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6543 Result += ",\n\t";
6544 }
6545 }
6546 else {
6547 Result += "0, // &OBJC_METACLASS_$_";
6548 Result += CDecl->getNameAsString();
6549 Result += ",\n\t";
6550 if (!rootClass) {
6551 Result += "0, // &"; Result += VarName;
6552 Result += CDecl->getSuperClass()->getNameAsString();
6553 Result += ",\n\t";
6554 }
6555 else
6556 Result += "0,\n\t";
6557 }
6558 Result += "0, // (void *)&_objc_empty_cache,\n\t";
6559 Result += "0, // unused, was (void *)&_objc_empty_vtable,\n\t";
6560 if (metaclass)
6561 Result += "&_OBJC_METACLASS_RO_$_";
6562 else
6563 Result += "&_OBJC_CLASS_RO_$_";
6564 Result += CDecl->getNameAsString();
6565 Result += ",\n};\n";
6566
6567 // Add static function to initialize some of the meta-data fields.
6568 // avoid doing it twice.
6569 if (metaclass)
6570 return;
6571
6572 const ObjCInterfaceDecl *SuperClass =
6573 rootClass ? CDecl : CDecl->getSuperClass();
6574
6575 Result += "static void OBJC_CLASS_SETUP_$_";
6576 Result += CDecl->getNameAsString();
6577 Result += "(void ) {\n";
6578 Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
6579 Result += ".isa = "; Result += "&OBJC_METACLASS_$_";
6580 Result += RootClass->getNameAsString(); Result += ";\n";
6581
6582 Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
6583 Result += ".superclass = ";
6584 if (rootClass)
6585 Result += "&OBJC_CLASS_$_";
6586 else
6587 Result += "&OBJC_METACLASS_$_";
6588
6589 Result += SuperClass->getNameAsString(); Result += ";\n";
6590
6591 Result += "\tOBJC_METACLASS_$_"; Result += CDecl->getNameAsString();
6592 Result += ".cache = "; Result += "&_objc_empty_cache"; Result += ";\n";
6593
6594 Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6595 Result += ".isa = "; Result += "&OBJC_METACLASS_$_";
6596 Result += CDecl->getNameAsString(); Result += ";\n";
6597
6598 if (!rootClass) {
6599 Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6600 Result += ".superclass = "; Result += "&OBJC_CLASS_$_";
6601 Result += SuperClass->getNameAsString(); Result += ";\n";
6602 }
6603
6604 Result += "\tOBJC_CLASS_$_"; Result += CDecl->getNameAsString();
6605 Result += ".cache = "; Result += "&_objc_empty_cache"; Result += ";\n";
6606 Result += "}\n";
6607}
6608
6609static void Write_category_t(RewriteModernObjC &RewriteObj, ASTContext *Context,
6610 std::string &Result,
6611 ObjCCategoryDecl *CatDecl,
6612 ObjCInterfaceDecl *ClassDecl,
6613 ArrayRef<ObjCMethodDecl *> InstanceMethods,
6614 ArrayRef<ObjCMethodDecl *> ClassMethods,
6615 ArrayRef<ObjCProtocolDecl *> RefedProtocols,
6616 ArrayRef<ObjCPropertyDecl *> ClassProperties) {
6617 StringRef CatName = CatDecl->getName();
6618 StringRef ClassName = ClassDecl->getName();
6619 // must declare an extern class object in case this class is not implemented
6620 // in this TU.
6621 Result += "\n";
6622 Result += "extern \"C\" ";
6623 if (ClassDecl->getImplementation())
6624 Result += "__declspec(dllexport) ";
6625 else
6626 Result += "__declspec(dllimport) ";
6627
6628 Result += "struct _class_t ";
6629 Result += "OBJC_CLASS_$_"; Result += ClassName;
6630 Result += ";\n";
6631
6632 Result += "\nstatic struct _category_t ";
6633 Result += "_OBJC_$_CATEGORY_";
6634 Result += ClassName; Result += "_$_"; Result += CatName;
6635 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = \n";
6636 Result += "{\n";
6637 Result += "\t\""; Result += ClassName; Result += "\",\n";
6638 Result += "\t0, // &"; Result += "OBJC_CLASS_$_"; Result += ClassName;
6639 Result += ",\n";
6640 if (InstanceMethods.size() > 0) {
6641 Result += "\t(const struct _method_list_t *)&";
6642 Result += "_OBJC_$_CATEGORY_INSTANCE_METHODS_";
6643 Result += ClassName; Result += "_$_"; Result += CatName;
6644 Result += ",\n";
6645 }
6646 else
6647 Result += "\t0,\n";
6648
6649 if (ClassMethods.size() > 0) {
6650 Result += "\t(const struct _method_list_t *)&";
6651 Result += "_OBJC_$_CATEGORY_CLASS_METHODS_";
6652 Result += ClassName; Result += "_$_"; Result += CatName;
6653 Result += ",\n";
6654 }
6655 else
6656 Result += "\t0,\n";
6657
6658 if (RefedProtocols.size() > 0) {
6659 Result += "\t(const struct _protocol_list_t *)&";
6660 Result += "_OBJC_CATEGORY_PROTOCOLS_$_";
6661 Result += ClassName; Result += "_$_"; Result += CatName;
6662 Result += ",\n";
6663 }
6664 else
6665 Result += "\t0,\n";
6666
6667 if (ClassProperties.size() > 0) {
6668 Result += "\t(const struct _prop_list_t *)&"; Result += "_OBJC_$_PROP_LIST_";
6669 Result += ClassName; Result += "_$_"; Result += CatName;
6670 Result += ",\n";
6671 }
6672 else
6673 Result += "\t0,\n";
6674
6675 Result += "};\n";
6676
6677 // Add static function to initialize the class pointer in the category structure.
6678 Result += "static void OBJC_CATEGORY_SETUP_$_";
6679 Result += ClassDecl->getNameAsString();
6680 Result += "_$_";
6681 Result += CatName;
6682 Result += "(void ) {\n";
6683 Result += "\t_OBJC_$_CATEGORY_";
6684 Result += ClassDecl->getNameAsString();
6685 Result += "_$_";
6686 Result += CatName;
6687 Result += ".cls = "; Result += "&OBJC_CLASS_$_"; Result += ClassName;
6688 Result += ";\n}\n";
6689}
6690
6691static void Write__extendedMethodTypes_initializer(RewriteModernObjC &RewriteObj,
6692 ASTContext *Context, std::string &Result,
6693 ArrayRef<ObjCMethodDecl *> Methods,
6694 StringRef VarName,
6695 StringRef ProtocolName) {
6696 if (Methods.size() == 0)
6697 return;
6698
6699 Result += "\nstatic const char *";
6700 Result += VarName; Result += ProtocolName;
6701 Result += " [] __attribute__ ((used, section (\"__DATA,__objc_const\"))) = \n";
6702 Result += "{\n";
6703 for (unsigned i = 0, e = Methods.size(); i < e; i++) {
6704 ObjCMethodDecl *MD = Methods[i];
6705 std::string MethodTypeString =
6706 Context->getObjCEncodingForMethodDecl(MD, true);
6707 std::string QuoteMethodTypeString;
6708 RewriteObj.QuoteDoublequotes(MethodTypeString, QuoteMethodTypeString);
6709 Result += "\t\""; Result += QuoteMethodTypeString; Result += "\"";
6710 if (i == e-1)
6711 Result += "\n};\n";
6712 else {
6713 Result += ",\n";
6714 }
6715 }
6716}
6717
6718static void Write_IvarOffsetVar(RewriteModernObjC &RewriteObj,
6719 ASTContext *Context,
6720 std::string &Result,
6721 ArrayRef<ObjCIvarDecl *> Ivars,
6722 ObjCInterfaceDecl *CDecl) {
6723 // FIXME. visibilty of offset symbols may have to be set; for Darwin
6724 // this is what happens:
6725 /**
6726 if (Ivar->getAccessControl() == ObjCIvarDecl::Private ||
6727 Ivar->getAccessControl() == ObjCIvarDecl::Package ||
6728 Class->getVisibility() == HiddenVisibility)
6729 Visibility should be: HiddenVisibility;
6730 else
6731 Visibility should be: DefaultVisibility;
6732 */
6733
6734 Result += "\n";
6735 for (unsigned i =0, e = Ivars.size(); i < e; i++) {
6736 ObjCIvarDecl *IvarDecl = Ivars[i];
6737 if (Context->getLangOpts().MicrosoftExt)
6738 Result += "__declspec(allocate(\".objc_ivar$B\")) ";
6739
6740 if (!Context->getLangOpts().MicrosoftExt ||
6741 IvarDecl->getAccessControl() == ObjCIvarDecl::Private ||
6742 IvarDecl->getAccessControl() == ObjCIvarDecl::Package)
6743 Result += "extern \"C\" unsigned long int ";
6744 else
6745 Result += "extern \"C\" __declspec(dllexport) unsigned long int ";
6746 if (Ivars[i]->isBitField())
6747 RewriteObj.ObjCIvarBitfieldGroupOffset(IvarDecl, Result);
6748 else
6749 WriteInternalIvarName(CDecl, IvarDecl, Result);
6750 Result += " __attribute__ ((used, section (\"__DATA,__objc_ivar\")))";
6751 Result += " = ";
6752 RewriteObj.RewriteIvarOffsetComputation(IvarDecl, Result);
6753 Result += ";\n";
6754 if (Ivars[i]->isBitField()) {
6755 // skip over rest of the ivar bitfields.
6756 SKIP_BITFIELDS(i , e, Ivars){ while ((i < e) && Ivars[i]->isBitField()) ++i
; if (i < e) --i; }
;
6757 }
6758 }
6759}
6760
6761static void Write__ivar_list_t_initializer(RewriteModernObjC &RewriteObj,
6762 ASTContext *Context, std::string &Result,
6763 ArrayRef<ObjCIvarDecl *> OriginalIvars,
6764 StringRef VarName,
6765 ObjCInterfaceDecl *CDecl) {
6766 if (OriginalIvars.size() > 0) {
6767 Write_IvarOffsetVar(RewriteObj, Context, Result, OriginalIvars, CDecl);
6768 SmallVector<ObjCIvarDecl *, 8> Ivars;
6769 // strip off all but the first ivar bitfield from each group of ivars.
6770 // Such ivars in the ivar list table will be replaced by their grouping struct
6771 // 'ivar'.
6772 for (unsigned i = 0, e = OriginalIvars.size(); i < e; i++) {
6773 if (OriginalIvars[i]->isBitField()) {
6774 Ivars.push_back(OriginalIvars[i]);
6775 // skip over rest of the ivar bitfields.
6776 SKIP_BITFIELDS(i , e, OriginalIvars){ while ((i < e) && OriginalIvars[i]->isBitField
()) ++i; if (i < e) --i; }
;
6777 }
6778 else
6779 Ivars.push_back(OriginalIvars[i]);
6780 }
6781
6782 Result += "\nstatic ";
6783 Write__ivar_list_t_TypeDecl(Result, Ivars.size());
6784 Result += " "; Result += VarName;
6785 Result += CDecl->getNameAsString();
6786 Result += " __attribute__ ((used, section (\"__DATA,__objc_const\"))) = {\n";
6787 Result += "\t"; Result += "sizeof(_ivar_t)"; Result += ",\n";
6788 Result += "\t"; Result += utostr(Ivars.size()); Result += ",\n";
6789 for (unsigned i =0, e = Ivars.size(); i < e; i++) {
6790 ObjCIvarDecl *IvarDecl = Ivars[i];
6791 if (i == 0)
6792 Result += "\t{{";
6793 else
6794 Result += "\t {";
6795 Result += "(unsigned long int *)&";
6796 if (Ivars[i]->isBitField())
6797 RewriteObj.ObjCIvarBitfieldGroupOffset(IvarDecl, Result);
6798 else
6799 WriteInternalIvarName(CDecl, IvarDecl, Result);
6800 Result += ", ";
6801
6802 Result += "\"";
6803 if (Ivars[i]->isBitField())
6804 RewriteObj.ObjCIvarBitfieldGroupDecl(Ivars[i], Result);
6805 else
6806 Result += IvarDecl->getName();
6807 Result += "\", ";
6808
6809 QualType IVQT = IvarDecl->getType();
6810 if (IvarDecl->isBitField())
6811 IVQT = RewriteObj.GetGroupRecordTypeForObjCIvarBitfield(IvarDecl);
6812
6813 std::string IvarTypeString, QuoteIvarTypeString;
6814 Context->getObjCEncodingForType(IVQT, IvarTypeString,
6815 IvarDecl);
6816 RewriteObj.QuoteDoublequotes(IvarTypeString, QuoteIvarTypeString);
6817 Result += "\""; Result += QuoteIvarTypeString; Result += "\", ";
6818
6819 // FIXME. this alignment represents the host alignment and need be changed to
6820 // represent the target alignment.
6821 unsigned Align = Context->getTypeAlign(IVQT)/8;
6822 Align = llvm::Log2_32(Align);
6823 Result += llvm::utostr(Align); Result += ", ";
6824 CharUnits Size = Context->getTypeSizeInChars(IVQT);
6825 Result += llvm::utostr(Size.getQuantity());
6826 if (i == e-1)
6827 Result += "}}\n";
6828 else
6829 Result += "},\n";
6830 }
6831 Result += "};\n";
6832 }
6833}
6834
6835/// RewriteObjCProtocolMetaData - Rewrite protocols meta-data.
6836void RewriteModernObjC::RewriteObjCProtocolMetaData(ObjCProtocolDecl *PDecl,
6837 std::string &Result) {
6838
6839 // Do not synthesize the protocol more than once.
6840 if (ObjCSynthesizedProtocols.count(PDecl->getCanonicalDecl()))
6841 return;
6842 WriteModernMetadataDeclarations(Context, Result);
6843
6844 if (ObjCProtocolDecl *Def = PDecl->getDefinition())
6845 PDecl = Def;
6846 // Must write out all protocol definitions in current qualifier list,
6847 // and in their nested qualifiers before writing out current definition.
6848 for (auto *I : PDecl->protocols())
6849 RewriteObjCProtocolMetaData(I, Result);
6850
6851 // Construct method lists.
6852 std::vector<ObjCMethodDecl *> InstanceMethods, ClassMethods;
6853 std::vector<ObjCMethodDecl *> OptInstanceMethods, OptClassMethods;
6854 for (auto *MD : PDecl->instance_methods()) {
6855 if (MD->getImplementationControl() == ObjCMethodDecl::Optional) {
6856 OptInstanceMethods.push_back(MD);
6857 } else {
6858 InstanceMethods.push_back(MD);
6859 }
6860 }
6861
6862 for (auto *MD : PDecl->class_methods()) {
6863 if (MD->getImplementationControl() == ObjCMethodDecl::Optional) {
6864 OptClassMethods.push_back(MD);
6865 } else {
6866 ClassMethods.push_back(MD);
6867 }
6868 }
6869 std::vector<ObjCMethodDecl *> AllMethods;
6870 for (unsigned i = 0, e = InstanceMethods.size(); i < e; i++)
6871 AllMethods.push_back(InstanceMethods[i]);
6872 for (unsigned i = 0, e = ClassMethods.size(); i < e; i++)
6873 AllMethods.push_back(ClassMethods[i]);
6874 for (unsigned i = 0, e = OptInstanceMethods.size(); i < e; i++)
6875 AllMethods.push_back(OptInstanceMethods[i]);
6876 for (unsigned i = 0, e = OptClassMethods.size(); i < e; i++)
6877 AllMethods.push_back(OptClassMethods[i]);
6878
6879 Write__extendedMethodTypes_initializer(*this, Context, Result,
6880 AllMethods,
6881 "_OBJC_PROTOCOL_METHOD_TYPES_",
6882 PDecl->getNameAsString());
6883 // Protocol's super protocol list
6884 SmallVector<ObjCProtocolDecl *, 8> SuperProtocols(PDecl->protocols());
6885 Write_protocol_list_initializer(Context, Result, SuperProtocols,
6886 "_OBJC_PROTOCOL_REFS_",
6887 PDecl->getNameAsString());
6888
6889 Write_method_list_t_initializer(*this, Context, Result, InstanceMethods,
6890 "_OBJC_PROTOCOL_INSTANCE_METHODS_",
6891 PDecl->getNameAsString(), false);
6892
6893 Write_method_list_t_initializer(*this, Context, Result, ClassMethods,
6894 "_OBJC_PROTOCOL_CLASS_METHODS_",
6895 PDecl->getNameAsString(), false);
6896
6897 Write_method_list_t_initializer(*this, Context, Result, OptInstanceMethods,
6898 "_OBJC_PROTOCOL_OPT_INSTANCE_METHODS_",
6899 PDecl->getNameAsString(), false);
6900
6901 Write_method_list_t_initializer(*this, Context, Result, OptClassMethods,
6902 "_OBJC_PROTOCOL_OPT_CLASS_METHODS_",
6903 PDecl->getNameAsString(), false);
6904
6905 // Protocol's property metadata.
6906 SmallVector<ObjCPropertyDecl *, 8> ProtocolProperties(
6907 PDecl->instance_properties());
6908 Write_prop_list_t_initializer(*this, Context, Result, ProtocolProperties,
6909 /* Container */nullptr,
6910 "_OBJC_PROTOCOL_PROPERTIES_",
6911 PDecl->getNameAsString());
6912
6913 // Writer out root metadata for current protocol: struct _protocol_t
6914 Result += "\n";
6915 if (LangOpts.MicrosoftExt)
6916 Result += "static ";
6917 Result += "struct _protocol_t _OBJC_PROTOCOL_";
6918 Result += PDecl->getNameAsString();
6919 Result += " __attribute__ ((used)) = {\n";
6920 Result += "\t0,\n"; // id is; is null
6921 Result += "\t\""; Result += PDecl->getNameAsString(); Result += "\",\n";
6922 if (SuperProtocols.size() > 0) {
6923 Result += "\t(const struct _protocol_list_t *)&"; Result += "_OBJC_PROTOCOL_REFS_";
6924 Result += PDecl->getNameAsString(); Result += ",\n";
6925 }
6926 else
6927 Result += "\t0,\n";
6928 if (InstanceMethods.size() > 0) {
6929 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_INSTANCE_METHODS_";
6930 Result += PDecl->getNameAsString(); Result += ",\n";
6931 }
6932 else
6933 Result += "\t0,\n";
6934
6935 if (ClassMethods.size() > 0) {
6936 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_CLASS_METHODS_";
6937 Result += PDecl->getNameAsString(); Result += ",\n";
6938 }
6939 else
6940 Result += "\t0,\n";
6941
6942 if (OptInstanceMethods.size() > 0) {
6943 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_OPT_INSTANCE_METHODS_";
6944 Result += PDecl->getNameAsString(); Result += ",\n";
6945 }
6946 else
6947 Result += "\t0,\n";
6948
6949 if (OptClassMethods.size() > 0) {
6950 Result += "\t(const struct method_list_t *)&_OBJC_PROTOCOL_OPT_CLASS_METHODS_";
6951 Result += PDecl->getNameAsString(); Result += ",\n";
6952 }
6953 else
6954 Result += "\t0,\n";
6955
6956 if (ProtocolProperties.size() > 0) {
6957 Result += "\t(const struct _prop_list_t *)&_OBJC_PROTOCOL_PROPERTIES_";
6958 Result += PDecl->getNameAsString(); Result += ",\n";
6959 }
6960 else
6961 Result += "\t0,\n";
6962
6963 Result += "\t"; Result += "sizeof(_protocol_t)"; Result += ",\n";
6964 Result += "\t0,\n";
6965
6966 if (AllMethods.size() > 0) {
6967 Result += "\t(const char **)&"; Result += "_OBJC_PROTOCOL_METHOD_TYPES_";
6968 Result += PDecl->getNameAsString();
6969 Result += "\n};\n";
6970 }
6971 else
6972 Result += "\t0\n};\n";
6973
6974 if (LangOpts.MicrosoftExt)
6975 Result += "static ";
6976 Result += "struct _protocol_t *";
6977 Result += "_OBJC_LABEL_PROTOCOL_$_"; Result += PDecl->getNameAsString();
6978 Result += " = &_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
6979 Result += ";\n";
6980
6981 // Mark this protocol as having been generated.
6982 if (!ObjCSynthesizedProtocols.insert(PDecl->getCanonicalDecl()).second)
6983 llvm_unreachable("protocol already synthesized")::llvm::llvm_unreachable_internal("protocol already synthesized"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 6983)
;
6984}
6985
6986/// hasObjCExceptionAttribute - Return true if this class or any super
6987/// class has the __objc_exception__ attribute.
6988/// FIXME. Move this to ASTContext.cpp as it is also used for IRGen.
6989static bool hasObjCExceptionAttribute(ASTContext &Context,
6990 const ObjCInterfaceDecl *OID) {
6991 if (OID->hasAttr<ObjCExceptionAttr>())
6992 return true;
6993 if (const ObjCInterfaceDecl *Super = OID->getSuperClass())
6994 return hasObjCExceptionAttribute(Context, Super);
6995 return false;
6996}
6997
6998void RewriteModernObjC::RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
6999 std::string &Result) {
7000 ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
7001
7002 // Explicitly declared @interface's are already synthesized.
7003 if (CDecl->isImplicitInterfaceDecl())
7004 assert(false &&((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 7005, __PRETTY_FUNCTION__))
7005 "Legacy implicit interface rewriting not supported in moder abi")((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 7005, __PRETTY_FUNCTION__))
;
7006
7007 WriteModernMetadataDeclarations(Context, Result);
7008 SmallVector<ObjCIvarDecl *, 8> IVars;
7009
7010 for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
7011 IVD; IVD = IVD->getNextIvar()) {
7012 // Ignore unnamed bit-fields.
7013 if (!IVD->getDeclName())
7014 continue;
7015 IVars.push_back(IVD);
7016 }
7017
7018 Write__ivar_list_t_initializer(*this, Context, Result, IVars,
7019 "_OBJC_$_INSTANCE_VARIABLES_",
7020 CDecl);
7021
7022 // Build _objc_method_list for class's instance methods if needed
7023 SmallVector<ObjCMethodDecl *, 32> InstanceMethods(IDecl->instance_methods());
7024
7025 // If any of our property implementations have associated getters or
7026 // setters, produce metadata for them as well.
7027 for (const auto *Prop : IDecl->property_impls()) {
7028 if (Prop->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
7029 continue;
7030 if (!Prop->getPropertyIvarDecl())
7031 continue;
7032 ObjCPropertyDecl *PD = Prop->getPropertyDecl();
7033 if (!PD)
7034 continue;
7035 if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
7036 if (mustSynthesizeSetterGetterMethod(IDecl, PD, true /*getter*/))
7037 InstanceMethods.push_back(Getter);
7038 if (PD->isReadOnly())
7039 continue;
7040 if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
7041 if (mustSynthesizeSetterGetterMethod(IDecl, PD, false /*setter*/))
7042 InstanceMethods.push_back(Setter);
7043 }
7044
7045 Write_method_list_t_initializer(*this, Context, Result, InstanceMethods,
7046 "_OBJC_$_INSTANCE_METHODS_",
7047 IDecl->getNameAsString(), true);
7048
7049 SmallVector<ObjCMethodDecl *, 32> ClassMethods(IDecl->class_methods());
7050
7051 Write_method_list_t_initializer(*this, Context, Result, ClassMethods,
7052 "_OBJC_$_CLASS_METHODS_",
7053 IDecl->getNameAsString(), true);
7054
7055 // Protocols referenced in class declaration?
7056 // Protocol's super protocol list
7057 std::vector<ObjCProtocolDecl *> RefedProtocols;
7058 const ObjCList<ObjCProtocolDecl> &Protocols = CDecl->getReferencedProtocols();
7059 for (ObjCList<ObjCProtocolDecl>::iterator I = Protocols.begin(),
7060 E = Protocols.end();
7061 I != E; ++I) {
7062 RefedProtocols.push_back(*I);
7063 // Must write out all protocol definitions in current qualifier list,
7064 // and in their nested qualifiers before writing out current definition.
7065 RewriteObjCProtocolMetaData(*I, Result);
7066 }
7067
7068 Write_protocol_list_initializer(Context, Result,
7069 RefedProtocols,
7070 "_OBJC_CLASS_PROTOCOLS_$_",
7071 IDecl->getNameAsString());
7072
7073 // Protocol's property metadata.
7074 SmallVector<ObjCPropertyDecl *, 8> ClassProperties(
7075 CDecl->instance_properties());
7076 Write_prop_list_t_initializer(*this, Context, Result, ClassProperties,
7077 /* Container */IDecl,
7078 "_OBJC_$_PROP_LIST_",
7079 CDecl->getNameAsString());
7080
7081 // Data for initializing _class_ro_t metaclass meta-data
7082 uint32_t flags = CLS_META;
7083 std::string InstanceSize;
7084 std::string InstanceStart;
7085
7086 bool classIsHidden = CDecl->getVisibility() == HiddenVisibility;
7087 if (classIsHidden)
7088 flags |= OBJC2_CLS_HIDDEN;
7089
7090 if (!CDecl->getSuperClass())
7091 // class is root
7092 flags |= CLS_ROOT;
7093 InstanceSize = "sizeof(struct _class_t)";
7094 InstanceStart = InstanceSize;
7095 Write__class_ro_t_initializer(Context, Result, flags,
7096 InstanceStart, InstanceSize,
7097 ClassMethods,
7098 nullptr,
7099 nullptr,
7100 nullptr,
7101 "_OBJC_METACLASS_RO_$_",
7102 CDecl->getNameAsString());
7103
7104 // Data for initializing _class_ro_t meta-data
7105 flags = CLS;
7106 if (classIsHidden)
7107 flags |= OBJC2_CLS_HIDDEN;
7108
7109 if (hasObjCExceptionAttribute(*Context, CDecl))
7110 flags |= CLS_EXCEPTION;
7111
7112 if (!CDecl->getSuperClass())
7113 // class is root
7114 flags |= CLS_ROOT;
7115
7116 InstanceSize.clear();
7117 InstanceStart.clear();
7118 if (!ObjCSynthesizedStructs.count(CDecl)) {
7119 InstanceSize = "0";
7120 InstanceStart = "0";
7121 }
7122 else {
7123 InstanceSize = "sizeof(struct ";
7124 InstanceSize += CDecl->getNameAsString();
7125 InstanceSize += "_IMPL)";
7126
7127 ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
7128 if (IVD) {
7129 RewriteIvarOffsetComputation(IVD, InstanceStart);
7130 }
7131 else
7132 InstanceStart = InstanceSize;
7133 }
7134 Write__class_ro_t_initializer(Context, Result, flags,
7135 InstanceStart, InstanceSize,
7136 InstanceMethods,
7137 RefedProtocols,
7138 IVars,
7139 ClassProperties,
7140 "_OBJC_CLASS_RO_$_",
7141 CDecl->getNameAsString());
7142
7143 Write_class_t(Context, Result,
7144 "OBJC_METACLASS_$_",
7145 CDecl, /*metaclass*/true);
7146
7147 Write_class_t(Context, Result,
7148 "OBJC_CLASS_$_",
7149 CDecl, /*metaclass*/false);
7150
7151 if (ImplementationIsNonLazy(IDecl))
7152 DefinedNonLazyClasses.push_back(CDecl);
7153}
7154
7155void RewriteModernObjC::RewriteClassSetupInitHook(std::string &Result) {
7156 int ClsDefCount = ClassImplementation.size();
7157 if (!ClsDefCount)
7158 return;
7159 Result += "#pragma section(\".objc_inithooks$B\", long, read, write)\n";
7160 Result += "__declspec(allocate(\".objc_inithooks$B\")) ";
7161 Result += "static void *OBJC_CLASS_SETUP[] = {\n";
7162 for (int i = 0; i < ClsDefCount; i++) {
7163 ObjCImplementationDecl *IDecl = ClassImplementation[i];
7164 ObjCInterfaceDecl *CDecl = IDecl->getClassInterface();
7165 Result += "\t(void *)&OBJC_CLASS_SETUP_$_";
7166 Result += CDecl->getName(); Result += ",\n";
7167 }
7168 Result += "};\n";
7169}
7170
7171void RewriteModernObjC::RewriteMetaDataIntoBuffer(std::string &Result) {
7172 int ClsDefCount = ClassImplementation.size();
7173 int CatDefCount = CategoryImplementation.size();
7174
7175 // For each implemented class, write out all its meta data.
7176 for (int i = 0; i < ClsDefCount; i++)
7177 RewriteObjCClassMetaData(ClassImplementation[i], Result);
7178
7179 RewriteClassSetupInitHook(Result);
7180
7181 // For each implemented category, write out all its meta data.
7182 for (int i = 0; i < CatDefCount; i++)
7183 RewriteObjCCategoryImplDecl(CategoryImplementation[i], Result);
7184
7185 RewriteCategorySetupInitHook(Result);
7186
7187 if (ClsDefCount > 0) {
7188 if (LangOpts.MicrosoftExt)
7189 Result += "__declspec(allocate(\".objc_classlist$B\")) ";
7190 Result += "static struct _class_t *L_OBJC_LABEL_CLASS_$ [";
7191 Result += llvm::utostr(ClsDefCount); Result += "]";
7192 Result +=
7193 " __attribute__((used, section (\"__DATA, __objc_classlist,"
7194 "regular,no_dead_strip\")))= {\n";
7195 for (int i = 0; i < ClsDefCount; i++) {
7196 Result += "\t&OBJC_CLASS_$_";
7197 Result += ClassImplementation[i]->getNameAsString();
7198 Result += ",\n";
7199 }
7200 Result += "};\n";
7201
7202 if (!DefinedNonLazyClasses.empty()) {
7203 if (LangOpts.MicrosoftExt)
7204 Result += "__declspec(allocate(\".objc_nlclslist$B\")) \n";
7205 Result += "static struct _class_t *_OBJC_LABEL_NONLAZY_CLASS_$[] = {\n\t";
7206 for (unsigned i = 0, e = DefinedNonLazyClasses.size(); i < e; i++) {
7207 Result += "\t&OBJC_CLASS_$_"; Result += DefinedNonLazyClasses[i]->getNameAsString();
7208 Result += ",\n";
7209 }
7210 Result += "};\n";
7211 }
7212 }
7213
7214 if (CatDefCount > 0) {
7215 if (LangOpts.MicrosoftExt)
7216 Result += "__declspec(allocate(\".objc_catlist$B\")) ";
7217 Result += "static struct _category_t *L_OBJC_LABEL_CATEGORY_$ [";
7218 Result += llvm::utostr(CatDefCount); Result += "]";
7219 Result +=
7220 " __attribute__((used, section (\"__DATA, __objc_catlist,"
7221 "regular,no_dead_strip\")))= {\n";
7222 for (int i = 0; i < CatDefCount; i++) {
7223 Result += "\t&_OBJC_$_CATEGORY_";
7224 Result +=
7225 CategoryImplementation[i]->getClassInterface()->getNameAsString();
7226 Result += "_$_";
7227 Result += CategoryImplementation[i]->getNameAsString();
7228 Result += ",\n";
7229 }
7230 Result += "};\n";
7231 }
7232
7233 if (!DefinedNonLazyCategories.empty()) {
7234 if (LangOpts.MicrosoftExt)
7235 Result += "__declspec(allocate(\".objc_nlcatlist$B\")) \n";
7236 Result += "static struct _category_t *_OBJC_LABEL_NONLAZY_CATEGORY_$[] = {\n\t";
7237 for (unsigned i = 0, e = DefinedNonLazyCategories.size(); i < e; i++) {
7238 Result += "\t&_OBJC_$_CATEGORY_";
7239 Result +=
7240 DefinedNonLazyCategories[i]->getClassInterface()->getNameAsString();
7241 Result += "_$_";
7242 Result += DefinedNonLazyCategories[i]->getNameAsString();
7243 Result += ",\n";
7244 }
7245 Result += "};\n";
7246 }
7247}
7248
7249void RewriteModernObjC::WriteImageInfo(std::string &Result) {
7250 if (LangOpts.MicrosoftExt)
7251 Result += "__declspec(allocate(\".objc_imageinfo$B\")) \n";
7252
7253 Result += "static struct IMAGE_INFO { unsigned version; unsigned flag; } ";
7254 // version 0, ObjCABI is 2
7255 Result += "_OBJC_IMAGE_INFO = { 0, 2 };\n";
7256}
7257
7258/// RewriteObjCCategoryImplDecl - Rewrite metadata for each category
7259/// implementation.
7260void RewriteModernObjC::RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *IDecl,
7261 std::string &Result) {
7262 WriteModernMetadataDeclarations(Context, Result);
7263 ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
7264 // Find category declaration for this implementation.
7265 ObjCCategoryDecl *CDecl
7266 = ClassDecl->FindCategoryDeclaration(IDecl->getIdentifier());
7267
7268 std::string FullCategoryName = ClassDecl->getNameAsString();
7269 FullCategoryName += "_$_";
7270 FullCategoryName += CDecl->getNameAsString();
7271
7272 // Build _objc_method_list for class's instance methods if needed
7273 SmallVector<ObjCMethodDecl *, 32> InstanceMethods(IDecl->instance_methods());
7274
7275 // If any of our property implementations have associated getters or
7276 // setters, produce metadata for them as well.
7277 for (const auto *Prop : IDecl->property_impls()) {
7278 if (Prop->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
7279 continue;
7280 if (!Prop->getPropertyIvarDecl())
7281 continue;
7282 ObjCPropertyDecl *PD = Prop->getPropertyDecl();
7283 if (!PD)
7284 continue;
7285 if (ObjCMethodDecl *Getter = PD->getGetterMethodDecl())
7286 InstanceMethods.push_back(Getter);
7287 if (PD->isReadOnly())
7288 continue;
7289 if (ObjCMethodDecl *Setter = PD->getSetterMethodDecl())
7290 InstanceMethods.push_back(Setter);
7291 }
7292
7293 Write_method_list_t_initializer(*this, Context, Result, InstanceMethods,
7294 "_OBJC_$_CATEGORY_INSTANCE_METHODS_",
7295 FullCategoryName, true);
7296
7297 SmallVector<ObjCMethodDecl *, 32> ClassMethods(IDecl->class_methods());
7298
7299 Write_method_list_t_initializer(*this, Context, Result, ClassMethods,
7300 "_OBJC_$_CATEGORY_CLASS_METHODS_",
7301 FullCategoryName, true);
7302
7303 // Protocols referenced in class declaration?
7304 // Protocol's super protocol list
7305 SmallVector<ObjCProtocolDecl *, 8> RefedProtocols(CDecl->protocols());
7306 for (auto *I : CDecl->protocols())
7307 // Must write out all protocol definitions in current qualifier list,
7308 // and in their nested qualifiers before writing out current definition.
7309 RewriteObjCProtocolMetaData(I, Result);
7310
7311 Write_protocol_list_initializer(Context, Result,
7312 RefedProtocols,
7313 "_OBJC_CATEGORY_PROTOCOLS_$_",
7314 FullCategoryName);
7315
7316 // Protocol's property metadata.
7317 SmallVector<ObjCPropertyDecl *, 8> ClassProperties(
7318 CDecl->instance_properties());
7319 Write_prop_list_t_initializer(*this, Context, Result, ClassProperties,
7320 /* Container */IDecl,
7321 "_OBJC_$_PROP_LIST_",
7322 FullCategoryName);
7323
7324 Write_category_t(*this, Context, Result,
7325 CDecl,
7326 ClassDecl,
7327 InstanceMethods,
7328 ClassMethods,
7329 RefedProtocols,
7330 ClassProperties);
7331
7332 // Determine if this category is also "non-lazy".
7333 if (ImplementationIsNonLazy(IDecl))
7334 DefinedNonLazyCategories.push_back(CDecl);
7335}
7336
7337void RewriteModernObjC::RewriteCategorySetupInitHook(std::string &Result) {
7338 int CatDefCount = CategoryImplementation.size();
7339 if (!CatDefCount)
7340 return;
7341 Result += "#pragma section(\".objc_inithooks$B\", long, read, write)\n";
7342 Result += "__declspec(allocate(\".objc_inithooks$B\")) ";
7343 Result += "static void *OBJC_CATEGORY_SETUP[] = {\n";
7344 for (int i = 0; i < CatDefCount; i++) {
7345 ObjCCategoryImplDecl *IDecl = CategoryImplementation[i];
7346 ObjCCategoryDecl *CatDecl= IDecl->getCategoryDecl();
7347 ObjCInterfaceDecl *ClassDecl = IDecl->getClassInterface();
7348 Result += "\t(void *)&OBJC_CATEGORY_SETUP_$_";
7349 Result += ClassDecl->getName();
7350 Result += "_$_";
7351 Result += CatDecl->getName();
7352 Result += ",\n";
7353 }
7354 Result += "};\n";
7355}
7356
7357// RewriteObjCMethodsMetaData - Rewrite methods metadata for instance or
7358/// class methods.
7359template<typename MethodIterator>
7360void RewriteModernObjC::RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
7361 MethodIterator MethodEnd,
7362 bool IsInstanceMethod,
7363 StringRef prefix,
7364 StringRef ClassName,
7365 std::string &Result) {
7366 if (MethodBegin == MethodEnd) return;
7367
7368 if (!objc_impl_method) {
7369 /* struct _objc_method {
7370 SEL _cmd;
7371 char *method_types;
7372 void *_imp;
7373 }
7374 */
7375 Result += "\nstruct _objc_method {\n";
7376 Result += "\tSEL _cmd;\n";
7377 Result += "\tchar *method_types;\n";
7378 Result += "\tvoid *_imp;\n";
7379 Result += "};\n";
7380
7381 objc_impl_method = true;
7382 }
7383
7384 // Build _objc_method_list for class's methods if needed
7385
7386 /* struct {
7387 struct _objc_method_list *next_method;
7388 int method_count;
7389 struct _objc_method method_list[];
7390 }
7391 */
7392 unsigned NumMethods = std::distance(MethodBegin, MethodEnd);
7393 Result += "\n";
7394 if (LangOpts.MicrosoftExt) {
7395 if (IsInstanceMethod)
7396 Result += "__declspec(allocate(\".inst_meth$B\")) ";
7397 else
7398 Result += "__declspec(allocate(\".cls_meth$B\")) ";
7399 }
7400 Result += "static struct {\n";
7401 Result += "\tstruct _objc_method_list *next_method;\n";
7402 Result += "\tint method_count;\n";
7403 Result += "\tstruct _objc_method method_list[";
7404 Result += utostr(NumMethods);
7405 Result += "];\n} _OBJC_";
7406 Result += prefix;
7407 Result += IsInstanceMethod ? "INSTANCE" : "CLASS";
7408 Result += "_METHODS_";
7409 Result += ClassName;
7410 Result += " __attribute__ ((used, section (\"__OBJC, __";
7411 Result += IsInstanceMethod ? "inst" : "cls";
7412 Result += "_meth\")))= ";
7413 Result += "{\n\t0, " + utostr(NumMethods) + "\n";
7414
7415 Result += "\t,{{(SEL)\"";
7416 Result += (*MethodBegin)->getSelector().getAsString().c_str();
7417 std::string MethodTypeString;
7418 Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString);
7419 Result += "\", \"";
7420 Result += MethodTypeString;
7421 Result += "\", (void *)";
7422 Result += MethodInternalNames[*MethodBegin];
7423 Result += "}\n";
7424 for (++MethodBegin; MethodBegin != MethodEnd; ++MethodBegin) {
7425 Result += "\t ,{(SEL)\"";
7426 Result += (*MethodBegin)->getSelector().getAsString().c_str();
7427 std::string MethodTypeString;
7428 Context->getObjCEncodingForMethodDecl(*MethodBegin, MethodTypeString);
7429 Result += "\", \"";
7430 Result += MethodTypeString;
7431 Result += "\", (void *)";
7432 Result += MethodInternalNames[*MethodBegin];
7433 Result += "}\n";
7434 }
7435 Result += "\t }\n};\n";
7436}
7437
7438Stmt *RewriteModernObjC::RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV) {
7439 SourceRange OldRange = IV->getSourceRange();
7440 Expr *BaseExpr = IV->getBase();
7441
7442 // Rewrite the base, but without actually doing replaces.
7443 {
7444 DisableReplaceStmtScope S(*this);
7445 BaseExpr = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(BaseExpr));
7446 IV->setBase(BaseExpr);
7447 }
7448
7449 ObjCIvarDecl *D = IV->getDecl();
7450
7451 Expr *Replacement = IV;
7452
7453 if (BaseExpr->getType()->isObjCObjectPointerType()) {
7454 const ObjCInterfaceType *iFaceDecl =
7455 dyn_cast<ObjCInterfaceType>(BaseExpr->getType()->getPointeeType());
7456 assert(iFaceDecl && "RewriteObjCIvarRefExpr - iFaceDecl is null")((iFaceDecl && "RewriteObjCIvarRefExpr - iFaceDecl is null"
) ? static_cast<void> (0) : __assert_fail ("iFaceDecl && \"RewriteObjCIvarRefExpr - iFaceDecl is null\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 7456, __PRETTY_FUNCTION__))
;
7457 // lookup which class implements the instance variable.
7458 ObjCInterfaceDecl *clsDeclared = nullptr;
7459 iFaceDecl->getDecl()->lookupInstanceVariable(D->getIdentifier(),
7460 clsDeclared);
7461 assert(clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class")((clsDeclared && "RewriteObjCIvarRefExpr(): Can't find class"
) ? static_cast<void> (0) : __assert_fail ("clsDeclared && \"RewriteObjCIvarRefExpr(): Can't find class\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 7461, __PRETTY_FUNCTION__))
;
7462
7463 // Build name of symbol holding ivar offset.
7464 std::string IvarOffsetName;
7465 if (D->isBitField())
7466 ObjCIvarBitfieldGroupOffset(D, IvarOffsetName);
7467 else
7468 WriteInternalIvarName(clsDeclared, D, IvarOffsetName);
7469
7470 ReferencedIvars[clsDeclared].insert(D);
7471
7472 // cast offset to "char *".
7473 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context,
7474 Context->getPointerType(Context->CharTy),
7475 CK_BitCast,
7476 BaseExpr);
7477 VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
7478 SourceLocation(), &Context->Idents.get(IvarOffsetName),
7479 Context->UnsignedLongTy, nullptr,
7480 SC_Extern);
7481 DeclRefExpr *DRE = new (Context)
7482 DeclRefExpr(*Context, NewVD, false, Context->UnsignedLongTy,
7483 VK_LValue, SourceLocation());
7484 BinaryOperator *addExpr =
7485 new (Context) BinaryOperator(castExpr, DRE, BO_Add,
7486 Context->getPointerType(Context->CharTy),
7487 VK_RValue, OK_Ordinary, SourceLocation(), FPOptions());
7488 // Don't forget the parens to enforce the proper binding.
7489 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(),
7490 SourceLocation(),
7491 addExpr);
7492 QualType IvarT = D->getType();
7493 if (D->isBitField())
7494 IvarT = GetGroupRecordTypeForObjCIvarBitfield(D);
7495
7496 if (!isa<TypedefType>(IvarT) && IvarT->isRecordType()) {
7497 RecordDecl *RD = IvarT->getAs<RecordType>()->getDecl();
7498 RD = RD->getDefinition();
7499 if (RD && !RD->getDeclName().getAsIdentifierInfo()) {
7500 // decltype(((Foo_IMPL*)0)->bar) *
7501 ObjCContainerDecl *CDecl =
7502 dyn_cast<ObjCContainerDecl>(D->getDeclContext());
7503 // ivar in class extensions requires special treatment.
7504 if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CDecl))
7505 CDecl = CatDecl->getClassInterface();
7506 std::string RecName = CDecl->getName();
7507 RecName += "_IMPL";
7508 RecordDecl *RD = RecordDecl::Create(
7509 *Context, TTK_Struct, TUDecl, SourceLocation(), SourceLocation(),
7510 &Context->Idents.get(RecName));
7511 QualType PtrStructIMPL = Context->getPointerType(Context->getTagDeclType(RD));
7512 unsigned UnsignedIntSize =
7513 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
7514 Expr *Zero = IntegerLiteral::Create(*Context,
7515 llvm::APInt(UnsignedIntSize, 0),
7516 Context->UnsignedIntTy, SourceLocation());
7517 Zero = NoTypeInfoCStyleCastExpr(Context, PtrStructIMPL, CK_BitCast, Zero);
7518 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
7519 Zero);
7520 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
7521 SourceLocation(),
7522 &Context->Idents.get(D->getNameAsString()),
7523 IvarT, nullptr,
7524 /*BitWidth=*/nullptr,
7525 /*Mutable=*/true, ICIS_NoInit);
7526 MemberExpr *ME = MemberExpr::CreateImplicit(
7527 *Context, PE, true, FD, FD->getType(), VK_LValue, OK_Ordinary);
7528 IvarT = Context->getDecltypeType(ME, ME->getType());
7529 }
7530 }
7531 convertObjCTypeToCStyleType(IvarT);
7532 QualType castT = Context->getPointerType(IvarT);
7533
7534 castExpr = NoTypeInfoCStyleCastExpr(Context,
7535 castT,
7536 CK_BitCast,
7537 PE);
7538
7539
7540 Expr *Exp = new (Context) UnaryOperator(castExpr, UO_Deref, IvarT,
7541 VK_LValue, OK_Ordinary,
7542 SourceLocation(), false);
7543 PE = new (Context) ParenExpr(OldRange.getBegin(),
7544 OldRange.getEnd(),
7545 Exp);
7546
7547 if (D->isBitField()) {
7548 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
7549 SourceLocation(),
7550 &Context->Idents.get(D->getNameAsString()),
7551 D->getType(), nullptr,
7552 /*BitWidth=*/D->getBitWidth(),
7553 /*Mutable=*/true, ICIS_NoInit);
7554 MemberExpr *ME =
7555 MemberExpr::CreateImplicit(*Context, PE, /*isArrow*/ false, FD,
7556 FD->getType(), VK_LValue, OK_Ordinary);
7557 Replacement = ME;
7558
7559 }
7560 else
7561 Replacement = PE;
7562 }
7563
7564 ReplaceStmtWithRange(IV, Replacement, OldRange);
7565 return Replacement;
7566}
7567
7568#endif // CLANG_ENABLE_OBJC_REWRITER

/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h

1//===- Type.h - C Language Family Type Representation -----------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9/// \file
10/// C Language Family Type Representation
11///
12/// This file defines the clang::Type interface and subclasses, used to
13/// represent types for languages in the C family.
14//
15//===----------------------------------------------------------------------===//
16
17#ifndef LLVM_CLANG_AST_TYPE_H
18#define LLVM_CLANG_AST_TYPE_H
19
20#include "clang/AST/NestedNameSpecifier.h"
21#include "clang/AST/TemplateName.h"
22#include "clang/Basic/AddressSpaces.h"
23#include "clang/Basic/AttrKinds.h"
24#include "clang/Basic/Diagnostic.h"
25#include "clang/Basic/ExceptionSpecificationType.h"
26#include "clang/Basic/LLVM.h"
27#include "clang/Basic/Linkage.h"
28#include "clang/Basic/PartialDiagnostic.h"
29#include "clang/Basic/SourceLocation.h"
30#include "clang/Basic/Specifiers.h"
31#include "clang/Basic/Visibility.h"
32#include "llvm/ADT/APInt.h"
33#include "llvm/ADT/APSInt.h"
34#include "llvm/ADT/ArrayRef.h"
35#include "llvm/ADT/FoldingSet.h"
36#include "llvm/ADT/None.h"
37#include "llvm/ADT/Optional.h"
38#include "llvm/ADT/PointerIntPair.h"
39#include "llvm/ADT/PointerUnion.h"
40#include "llvm/ADT/StringRef.h"
41#include "llvm/ADT/Twine.h"
42#include "llvm/ADT/iterator_range.h"
43#include "llvm/Support/Casting.h"
44#include "llvm/Support/Compiler.h"
45#include "llvm/Support/ErrorHandling.h"
46#include "llvm/Support/PointerLikeTypeTraits.h"
47#include "llvm/Support/type_traits.h"
48#include "llvm/Support/TrailingObjects.h"
49#include <cassert>
50#include <cstddef>
51#include <cstdint>
52#include <cstring>
53#include <string>
54#include <type_traits>
55#include <utility>
56
57namespace clang {
58
59class ExtQuals;
60class QualType;
61class TagDecl;
62class Type;
63
64enum {
65 TypeAlignmentInBits = 4,
66 TypeAlignment = 1 << TypeAlignmentInBits
67};
68
69} // namespace clang
70
71namespace llvm {
72
73 template <typename T>
74 struct PointerLikeTypeTraits;
75 template<>
76 struct PointerLikeTypeTraits< ::clang::Type*> {
77 static inline void *getAsVoidPointer(::clang::Type *P) { return P; }
78
79 static inline ::clang::Type *getFromVoidPointer(void *P) {
80 return static_cast< ::clang::Type*>(P);
81 }
82
83 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits };
84 };
85
86 template<>
87 struct PointerLikeTypeTraits< ::clang::ExtQuals*> {
88 static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; }
89
90 static inline ::clang::ExtQuals *getFromVoidPointer(void *P) {
91 return static_cast< ::clang::ExtQuals*>(P);
92 }
93
94 enum { NumLowBitsAvailable = clang::TypeAlignmentInBits };
95 };
96
97} // namespace llvm
98
99namespace clang {
100
101class ASTContext;
102template <typename> class CanQual;
103class CXXRecordDecl;
104class DeclContext;
105class EnumDecl;
106class Expr;
107class ExtQualsTypeCommonBase;
108class FunctionDecl;
109class IdentifierInfo;
110class NamedDecl;
111class ObjCInterfaceDecl;
112class ObjCProtocolDecl;
113class ObjCTypeParamDecl;
114struct PrintingPolicy;
115class RecordDecl;
116class Stmt;
117class TagDecl;
118class TemplateArgument;
119class TemplateArgumentListInfo;
120class TemplateArgumentLoc;
121class TemplateTypeParmDecl;
122class TypedefNameDecl;
123class UnresolvedUsingTypenameDecl;
124
125using CanQualType = CanQual<Type>;
126
127// Provide forward declarations for all of the *Type classes.
128#define TYPE(Class, Base) class Class##Type;
129#include "clang/AST/TypeNodes.inc"
130
131/// The collection of all-type qualifiers we support.
132/// Clang supports five independent qualifiers:
133/// * C99: const, volatile, and restrict
134/// * MS: __unaligned
135/// * Embedded C (TR18037): address spaces
136/// * Objective C: the GC attributes (none, weak, or strong)
137class Qualifiers {
138public:
139 enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ.
140 Const = 0x1,
141 Restrict = 0x2,
142 Volatile = 0x4,
143 CVRMask = Const | Volatile | Restrict
144 };
145
146 enum GC {
147 GCNone = 0,
148 Weak,
149 Strong
150 };
151
152 enum ObjCLifetime {
153 /// There is no lifetime qualification on this type.
154 OCL_None,
155
156 /// This object can be modified without requiring retains or
157 /// releases.
158 OCL_ExplicitNone,
159
160 /// Assigning into this object requires the old value to be
161 /// released and the new value to be retained. The timing of the
162 /// release of the old value is inexact: it may be moved to
163 /// immediately after the last known point where the value is
164 /// live.
165 OCL_Strong,
166
167 /// Reading or writing from this object requires a barrier call.
168 OCL_Weak,
169
170 /// Assigning into this object requires a lifetime extension.
171 OCL_Autoreleasing
172 };
173
174 enum {
175 /// The maximum supported address space number.
176 /// 23 bits should be enough for anyone.
177 MaxAddressSpace = 0x7fffffu,
178
179 /// The width of the "fast" qualifier mask.
180 FastWidth = 3,
181
182 /// The fast qualifier mask.
183 FastMask = (1 << FastWidth) - 1
184 };
185
186 /// Returns the common set of qualifiers while removing them from
187 /// the given sets.
188 static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) {
189 // If both are only CVR-qualified, bit operations are sufficient.
190 if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) {
191 Qualifiers Q;
192 Q.Mask = L.Mask & R.Mask;
193 L.Mask &= ~Q.Mask;
194 R.Mask &= ~Q.Mask;
195 return Q;
196 }
197
198 Qualifiers Q;
199 unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers();
200 Q.addCVRQualifiers(CommonCRV);
201 L.removeCVRQualifiers(CommonCRV);
202 R.removeCVRQualifiers(CommonCRV);
203
204 if (L.getObjCGCAttr() == R.getObjCGCAttr()) {
205 Q.setObjCGCAttr(L.getObjCGCAttr());
206 L.removeObjCGCAttr();
207 R.removeObjCGCAttr();
208 }
209
210 if (L.getObjCLifetime() == R.getObjCLifetime()) {
211 Q.setObjCLifetime(L.getObjCLifetime());
212 L.removeObjCLifetime();
213 R.removeObjCLifetime();
214 }
215
216 if (L.getAddressSpace() == R.getAddressSpace()) {
217 Q.setAddressSpace(L.getAddressSpace());
218 L.removeAddressSpace();
219 R.removeAddressSpace();
220 }
221 return Q;
222 }
223
224 static Qualifiers fromFastMask(unsigned Mask) {
225 Qualifiers Qs;
226 Qs.addFastQualifiers(Mask);
227 return Qs;
228 }
229
230 static Qualifiers fromCVRMask(unsigned CVR) {
231 Qualifiers Qs;
232 Qs.addCVRQualifiers(CVR);
233 return Qs;
234 }
235
236 static Qualifiers fromCVRUMask(unsigned CVRU) {
237 Qualifiers Qs;
238 Qs.addCVRUQualifiers(CVRU);
239 return Qs;
240 }
241
242 // Deserialize qualifiers from an opaque representation.
243 static Qualifiers fromOpaqueValue(unsigned opaque) {
244 Qualifiers Qs;
245 Qs.Mask = opaque;
246 return Qs;
247 }
248
249 // Serialize these qualifiers into an opaque representation.
250 unsigned getAsOpaqueValue() const {
251 return Mask;
252 }
253
254 bool hasConst() const { return Mask & Const; }
255 bool hasOnlyConst() const { return Mask == Const; }
256 void removeConst() { Mask &= ~Const; }
257 void addConst() { Mask |= Const; }
258
259 bool hasVolatile() const { return Mask & Volatile; }
260 bool hasOnlyVolatile() const { return Mask == Volatile; }
261 void removeVolatile() { Mask &= ~Volatile; }
262 void addVolatile() { Mask |= Volatile; }
263
264 bool hasRestrict() const { return Mask & Restrict; }
265 bool hasOnlyRestrict() const { return Mask == Restrict; }
266 void removeRestrict() { Mask &= ~Restrict; }
267 void addRestrict() { Mask |= Restrict; }
268
269 bool hasCVRQualifiers() const { return getCVRQualifiers(); }
270 unsigned getCVRQualifiers() const { return Mask & CVRMask; }
271 unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); }
272
273 void setCVRQualifiers(unsigned mask) {
274 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 274, __PRETTY_FUNCTION__))
;
275 Mask = (Mask & ~CVRMask) | mask;
276 }
277 void removeCVRQualifiers(unsigned mask) {
278 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 278, __PRETTY_FUNCTION__))
;
279 Mask &= ~mask;
280 }
281 void removeCVRQualifiers() {
282 removeCVRQualifiers(CVRMask);
283 }
284 void addCVRQualifiers(unsigned mask) {
285 assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 285, __PRETTY_FUNCTION__))
;
286 Mask |= mask;
287 }
288 void addCVRUQualifiers(unsigned mask) {
289 assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")((!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask & ~UMask) && \"bitmask contains non-CVRU bits\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 289, __PRETTY_FUNCTION__))
;
290 Mask |= mask;
291 }
292
293 bool hasUnaligned() const { return Mask & UMask; }
294 void setUnaligned(bool flag) {
295 Mask = (Mask & ~UMask) | (flag ? UMask : 0);
296 }
297 void removeUnaligned() { Mask &= ~UMask; }
298 void addUnaligned() { Mask |= UMask; }
299
300 bool hasObjCGCAttr() const { return Mask & GCAttrMask; }
301 GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); }
302 void setObjCGCAttr(GC type) {
303 Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift);
304 }
305 void removeObjCGCAttr() { setObjCGCAttr(GCNone); }
306 void addObjCGCAttr(GC type) {
307 assert(type)((type) ? static_cast<void> (0) : __assert_fail ("type"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 307, __PRETTY_FUNCTION__))
;
308 setObjCGCAttr(type);
309 }
310 Qualifiers withoutObjCGCAttr() const {
311 Qualifiers qs = *this;
312 qs.removeObjCGCAttr();
313 return qs;
314 }
315 Qualifiers withoutObjCLifetime() const {
316 Qualifiers qs = *this;
317 qs.removeObjCLifetime();
318 return qs;
319 }
320 Qualifiers withoutAddressSpace() const {
321 Qualifiers qs = *this;
322 qs.removeAddressSpace();
323 return qs;
324 }
325
326 bool hasObjCLifetime() const { return Mask & LifetimeMask; }
327 ObjCLifetime getObjCLifetime() const {
328 return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift);
329 }
330 void setObjCLifetime(ObjCLifetime type) {
331 Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift);
332 }
333 void removeObjCLifetime() { setObjCLifetime(OCL_None); }
334 void addObjCLifetime(ObjCLifetime type) {
335 assert(type)((type) ? static_cast<void> (0) : __assert_fail ("type"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 335, __PRETTY_FUNCTION__))
;
336 assert(!hasObjCLifetime())((!hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail
("!hasObjCLifetime()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 336, __PRETTY_FUNCTION__))
;
337 Mask |= (type << LifetimeShift);
338 }
339
340 /// True if the lifetime is neither None or ExplicitNone.
341 bool hasNonTrivialObjCLifetime() const {
342 ObjCLifetime lifetime = getObjCLifetime();
343 return (lifetime > OCL_ExplicitNone);
344 }
345
346 /// True if the lifetime is either strong or weak.
347 bool hasStrongOrWeakObjCLifetime() const {
348 ObjCLifetime lifetime = getObjCLifetime();
349 return (lifetime == OCL_Strong || lifetime == OCL_Weak);
350 }
351
352 bool hasAddressSpace() const { return Mask & AddressSpaceMask; }
353 LangAS getAddressSpace() const {
354 return static_cast<LangAS>(Mask >> AddressSpaceShift);
355 }
356 bool hasTargetSpecificAddressSpace() const {
357 return isTargetAddressSpace(getAddressSpace());
358 }
359 /// Get the address space attribute value to be printed by diagnostics.
360 unsigned getAddressSpaceAttributePrintValue() const {
361 auto Addr = getAddressSpace();
362 // This function is not supposed to be used with language specific
363 // address spaces. If that happens, the diagnostic message should consider
364 // printing the QualType instead of the address space value.
365 assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace())((Addr == LangAS::Default || hasTargetSpecificAddressSpace())
? static_cast<void> (0) : __assert_fail ("Addr == LangAS::Default || hasTargetSpecificAddressSpace()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 365, __PRETTY_FUNCTION__))
;
366 if (Addr != LangAS::Default)
367 return toTargetAddressSpace(Addr);
368 // TODO: The diagnostic messages where Addr may be 0 should be fixed
369 // since it cannot differentiate the situation where 0 denotes the default
370 // address space or user specified __attribute__((address_space(0))).
371 return 0;
372 }
373 void setAddressSpace(LangAS space) {
374 assert((unsigned)space <= MaxAddressSpace)(((unsigned)space <= MaxAddressSpace) ? static_cast<void
> (0) : __assert_fail ("(unsigned)space <= MaxAddressSpace"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 374, __PRETTY_FUNCTION__))
;
375 Mask = (Mask & ~AddressSpaceMask)
376 | (((uint32_t) space) << AddressSpaceShift);
377 }
378 void removeAddressSpace() { setAddressSpace(LangAS::Default); }
379 void addAddressSpace(LangAS space) {
380 assert(space != LangAS::Default)((space != LangAS::Default) ? static_cast<void> (0) : __assert_fail
("space != LangAS::Default", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 380, __PRETTY_FUNCTION__))
;
381 setAddressSpace(space);
382 }
383
384 // Fast qualifiers are those that can be allocated directly
385 // on a QualType object.
386 bool hasFastQualifiers() const { return getFastQualifiers(); }
387 unsigned getFastQualifiers() const { return Mask & FastMask; }
388 void setFastQualifiers(unsigned mask) {
389 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 389, __PRETTY_FUNCTION__))
;
390 Mask = (Mask & ~FastMask) | mask;
391 }
392 void removeFastQualifiers(unsigned mask) {
393 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 393, __PRETTY_FUNCTION__))
;
394 Mask &= ~mask;
395 }
396 void removeFastQualifiers() {
397 removeFastQualifiers(FastMask);
398 }
399 void addFastQualifiers(unsigned mask) {
400 assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits"
) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 400, __PRETTY_FUNCTION__))
;
401 Mask |= mask;
402 }
403
404 /// Return true if the set contains any qualifiers which require an ExtQuals
405 /// node to be allocated.
406 bool hasNonFastQualifiers() const { return Mask & ~FastMask; }
407 Qualifiers getNonFastQualifiers() const {
408 Qualifiers Quals = *this;
409 Quals.setFastQualifiers(0);
410 return Quals;
411 }
412
413 /// Return true if the set contains any qualifiers.
414 bool hasQualifiers() const { return Mask; }
415 bool empty() const { return !Mask; }
416
417 /// Add the qualifiers from the given set to this set.
418 void addQualifiers(Qualifiers Q) {
419 // If the other set doesn't have any non-boolean qualifiers, just
420 // bit-or it in.
421 if (!(Q.Mask & ~CVRMask))
422 Mask |= Q.Mask;
423 else {
424 Mask |= (Q.Mask & CVRMask);
425 if (Q.hasAddressSpace())
426 addAddressSpace(Q.getAddressSpace());
427 if (Q.hasObjCGCAttr())
428 addObjCGCAttr(Q.getObjCGCAttr());
429 if (Q.hasObjCLifetime())
430 addObjCLifetime(Q.getObjCLifetime());
431 }
432 }
433
434 /// Remove the qualifiers from the given set from this set.
435 void removeQualifiers(Qualifiers Q) {
436 // If the other set doesn't have any non-boolean qualifiers, just
437 // bit-and the inverse in.
438 if (!(Q.Mask & ~CVRMask))
439 Mask &= ~Q.Mask;
440 else {
441 Mask &= ~(Q.Mask & CVRMask);
442 if (getObjCGCAttr() == Q.getObjCGCAttr())
443 removeObjCGCAttr();
444 if (getObjCLifetime() == Q.getObjCLifetime())
445 removeObjCLifetime();
446 if (getAddressSpace() == Q.getAddressSpace())
447 removeAddressSpace();
448 }
449 }
450
451 /// Add the qualifiers from the given set to this set, given that
452 /// they don't conflict.
453 void addConsistentQualifiers(Qualifiers qs) {
454 assert(getAddressSpace() == qs.getAddressSpace() ||((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace
() || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail
("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 455, __PRETTY_FUNCTION__))
455 !hasAddressSpace() || !qs.hasAddressSpace())((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace
() || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail
("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 455, __PRETTY_FUNCTION__))
;
456 assert(getObjCGCAttr() == qs.getObjCGCAttr() ||((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() ||
!qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail
("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 457, __PRETTY_FUNCTION__))
457 !hasObjCGCAttr() || !qs.hasObjCGCAttr())((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() ||
!qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail
("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 457, __PRETTY_FUNCTION__))
;
458 assert(getObjCLifetime() == qs.getObjCLifetime() ||((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime
() || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail
("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 459, __PRETTY_FUNCTION__))
459 !hasObjCLifetime() || !qs.hasObjCLifetime())((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime
() || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail
("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 459, __PRETTY_FUNCTION__))
;
460 Mask |= qs.Mask;
461 }
462
463 /// Returns true if address space A is equal to or a superset of B.
464 /// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of
465 /// overlapping address spaces.
466 /// CL1.1 or CL1.2:
467 /// every address space is a superset of itself.
468 /// CL2.0 adds:
469 /// __generic is a superset of any address space except for __constant.
470 static bool isAddressSpaceSupersetOf(LangAS A, LangAS B) {
471 // Address spaces must match exactly.
472 return A == B ||
473 // Otherwise in OpenCLC v2.0 s6.5.5: every address space except
474 // for __constant can be used as __generic.
475 (A == LangAS::opencl_generic && B != LangAS::opencl_constant);
476 }
477
478 /// Returns true if the address space in these qualifiers is equal to or
479 /// a superset of the address space in the argument qualifiers.
480 bool isAddressSpaceSupersetOf(Qualifiers other) const {
481 return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace());
482 }
483
484 /// Determines if these qualifiers compatibly include another set.
485 /// Generally this answers the question of whether an object with the other
486 /// qualifiers can be safely used as an object with these qualifiers.
487 bool compatiblyIncludes(Qualifiers other) const {
488 return isAddressSpaceSupersetOf(other) &&
489 // ObjC GC qualifiers can match, be added, or be removed, but can't
490 // be changed.
491 (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() ||
492 !other.hasObjCGCAttr()) &&
493 // ObjC lifetime qualifiers must match exactly.
494 getObjCLifetime() == other.getObjCLifetime() &&
495 // CVR qualifiers may subset.
496 (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) &&
497 // U qualifier may superset.
498 (!other.hasUnaligned() || hasUnaligned());
499 }
500
501 /// Determines if these qualifiers compatibly include another set of
502 /// qualifiers from the narrow perspective of Objective-C ARC lifetime.
503 ///
504 /// One set of Objective-C lifetime qualifiers compatibly includes the other
505 /// if the lifetime qualifiers match, or if both are non-__weak and the
506 /// including set also contains the 'const' qualifier, or both are non-__weak
507 /// and one is None (which can only happen in non-ARC modes).
508 bool compatiblyIncludesObjCLifetime(Qualifiers other) const {
509 if (getObjCLifetime() == other.getObjCLifetime())
510 return true;
511
512 if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak)
513 return false;
514
515 if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None)
516 return true;
517
518 return hasConst();
519 }
520
521 /// Determine whether this set of qualifiers is a strict superset of
522 /// another set of qualifiers, not considering qualifier compatibility.
523 bool isStrictSupersetOf(Qualifiers Other) const;
524
525 bool operator==(Qualifiers Other) const { return Mask == Other.Mask; }
526 bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; }
527
528 explicit operator bool() const { return hasQualifiers(); }
529
530 Qualifiers &operator+=(Qualifiers R) {
531 addQualifiers(R);
532 return *this;
533 }
534
535 // Union two qualifier sets. If an enumerated qualifier appears
536 // in both sets, use the one from the right.
537 friend Qualifiers operator+(Qualifiers L, Qualifiers R) {
538 L += R;
539 return L;
540 }
541
542 Qualifiers &operator-=(Qualifiers R) {
543 removeQualifiers(R);
544 return *this;
545 }
546
547 /// Compute the difference between two qualifier sets.
548 friend Qualifiers operator-(Qualifiers L, Qualifiers R) {
549 L -= R;
550 return L;
551 }
552
553 std::string getAsString() const;
554 std::string getAsString(const PrintingPolicy &Policy) const;
555
556 bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const;
557 void print(raw_ostream &OS, const PrintingPolicy &Policy,
558 bool appendSpaceIfNonEmpty = false) const;
559
560 void Profile(llvm::FoldingSetNodeID &ID) const {
561 ID.AddInteger(Mask);
562 }
563
564private:
565 // bits: |0 1 2|3|4 .. 5|6 .. 8|9 ... 31|
566 // |C R V|U|GCAttr|Lifetime|AddressSpace|
567 uint32_t Mask = 0;
568
569 static const uint32_t UMask = 0x8;
570 static const uint32_t UShift = 3;
571 static const uint32_t GCAttrMask = 0x30;
572 static const uint32_t GCAttrShift = 4;
573 static const uint32_t LifetimeMask = 0x1C0;
574 static const uint32_t LifetimeShift = 6;
575 static const uint32_t AddressSpaceMask =
576 ~(CVRMask | UMask | GCAttrMask | LifetimeMask);
577 static const uint32_t AddressSpaceShift = 9;
578};
579
580/// A std::pair-like structure for storing a qualified type split
581/// into its local qualifiers and its locally-unqualified type.
582struct SplitQualType {
583 /// The locally-unqualified type.
584 const Type *Ty = nullptr;
585
586 /// The local qualifiers.
587 Qualifiers Quals;
588
589 SplitQualType() = default;
590 SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {}
591
592 SplitQualType getSingleStepDesugaredType() const; // end of this file
593
594 // Make std::tie work.
595 std::pair<const Type *,Qualifiers> asPair() const {
596 return std::pair<const Type *, Qualifiers>(Ty, Quals);
597 }
598
599 friend bool operator==(SplitQualType a, SplitQualType b) {
600 return a.Ty == b.Ty && a.Quals == b.Quals;
601 }
602 friend bool operator!=(SplitQualType a, SplitQualType b) {
603 return a.Ty != b.Ty || a.Quals != b.Quals;
604 }
605};
606
607/// The kind of type we are substituting Objective-C type arguments into.
608///
609/// The kind of substitution affects the replacement of type parameters when
610/// no concrete type information is provided, e.g., when dealing with an
611/// unspecialized type.
612enum class ObjCSubstitutionContext {
613 /// An ordinary type.
614 Ordinary,
615
616 /// The result type of a method or function.
617 Result,
618
619 /// The parameter type of a method or function.
620 Parameter,
621
622 /// The type of a property.
623 Property,
624
625 /// The superclass of a type.
626 Superclass,
627};
628
629/// A (possibly-)qualified type.
630///
631/// For efficiency, we don't store CV-qualified types as nodes on their
632/// own: instead each reference to a type stores the qualifiers. This
633/// greatly reduces the number of nodes we need to allocate for types (for
634/// example we only need one for 'int', 'const int', 'volatile int',
635/// 'const volatile int', etc).
636///
637/// As an added efficiency bonus, instead of making this a pair, we
638/// just store the two bits we care about in the low bits of the
639/// pointer. To handle the packing/unpacking, we make QualType be a
640/// simple wrapper class that acts like a smart pointer. A third bit
641/// indicates whether there are extended qualifiers present, in which
642/// case the pointer points to a special structure.
643class QualType {
644 friend class QualifierCollector;
645
646 // Thankfully, these are efficiently composable.
647 llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>,
648 Qualifiers::FastWidth> Value;
649
650 const ExtQuals *getExtQualsUnsafe() const {
651 return Value.getPointer().get<const ExtQuals*>();
652 }
653
654 const Type *getTypePtrUnsafe() const {
655 return Value.getPointer().get<const Type*>();
656 }
657
658 const ExtQualsTypeCommonBase *getCommonPtr() const {
659 assert(!isNull() && "Cannot retrieve a NULL type pointer")((!isNull() && "Cannot retrieve a NULL type pointer")
? static_cast<void> (0) : __assert_fail ("!isNull() && \"Cannot retrieve a NULL type pointer\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 659, __PRETTY_FUNCTION__))
;
660 auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue());
661 CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1);
662 return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal);
663 }
664
665public:
666 QualType() = default;
667 QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {}
668 QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {}
669
670 unsigned getLocalFastQualifiers() const { return Value.getInt(); }
671 void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); }
672
673 /// Retrieves a pointer to the underlying (unqualified) type.
674 ///
675 /// This function requires that the type not be NULL. If the type might be
676 /// NULL, use the (slightly less efficient) \c getTypePtrOrNull().
677 const Type *getTypePtr() const;
678
679 const Type *getTypePtrOrNull() const;
680
681 /// Retrieves a pointer to the name of the base type.
682 const IdentifierInfo *getBaseTypeIdentifier() const;
683
684 /// Divides a QualType into its unqualified type and a set of local
685 /// qualifiers.
686 SplitQualType split() const;
687
688 void *getAsOpaquePtr() const { return Value.getOpaqueValue(); }
689
690 static QualType getFromOpaquePtr(const void *Ptr) {
691 QualType T;
692 T.Value.setFromOpaqueValue(const_cast<void*>(Ptr));
693 return T;
694 }
695
696 const Type &operator*() const {
697 return *getTypePtr();
698 }
699
700 const Type *operator->() const {
701 return getTypePtr();
702 }
703
704 bool isCanonical() const;
705 bool isCanonicalAsParam() const;
706
707 /// Return true if this QualType doesn't point to a type yet.
708 bool isNull() const {
709 return Value.getPointer().isNull();
710 }
711
712 /// Determine whether this particular QualType instance has the
713 /// "const" qualifier set, without looking through typedefs that may have
714 /// added "const" at a different level.
715 bool isLocalConstQualified() const {
716 return (getLocalFastQualifiers() & Qualifiers::Const);
717 }
718
719 /// Determine whether this type is const-qualified.
720 bool isConstQualified() const;
721
722 /// Determine whether this particular QualType instance has the
723 /// "restrict" qualifier set, without looking through typedefs that may have
724 /// added "restrict" at a different level.
725 bool isLocalRestrictQualified() const {
726 return (getLocalFastQualifiers() & Qualifiers::Restrict);
727 }
728
729 /// Determine whether this type is restrict-qualified.
730 bool isRestrictQualified() const;
731
732 /// Determine whether this particular QualType instance has the
733 /// "volatile" qualifier set, without looking through typedefs that may have
734 /// added "volatile" at a different level.
735 bool isLocalVolatileQualified() const {
736 return (getLocalFastQualifiers() & Qualifiers::Volatile);
737 }
738
739 /// Determine whether this type is volatile-qualified.
740 bool isVolatileQualified() const;
741
742 /// Determine whether this particular QualType instance has any
743 /// qualifiers, without looking through any typedefs that might add
744 /// qualifiers at a different level.
745 bool hasLocalQualifiers() const {
746 return getLocalFastQualifiers() || hasLocalNonFastQualifiers();
747 }
748
749 /// Determine whether this type has any qualifiers.
750 bool hasQualifiers() const;
751
752 /// Determine whether this particular QualType instance has any
753 /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType
754 /// instance.
755 bool hasLocalNonFastQualifiers() const {
756 return Value.getPointer().is<const ExtQuals*>();
757 }
758
759 /// Retrieve the set of qualifiers local to this particular QualType
760 /// instance, not including any qualifiers acquired through typedefs or
761 /// other sugar.
762 Qualifiers getLocalQualifiers() const;
763
764 /// Retrieve the set of qualifiers applied to this type.
765 Qualifiers getQualifiers() const;
766
767 /// Retrieve the set of CVR (const-volatile-restrict) qualifiers
768 /// local to this particular QualType instance, not including any qualifiers
769 /// acquired through typedefs or other sugar.
770 unsigned getLocalCVRQualifiers() const {
771 return getLocalFastQualifiers();
772 }
773
774 /// Retrieve the set of CVR (const-volatile-restrict) qualifiers
775 /// applied to this type.
776 unsigned getCVRQualifiers() const;
777
778 bool isConstant(const ASTContext& Ctx) const {
779 return QualType::isConstant(*this, Ctx);
780 }
781
782 /// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10).
783 bool isPODType(const ASTContext &Context) const;
784
785 /// Return true if this is a POD type according to the rules of the C++98
786 /// standard, regardless of the current compilation's language.
787 bool isCXX98PODType(const ASTContext &Context) const;
788
789 /// Return true if this is a POD type according to the more relaxed rules
790 /// of the C++11 standard, regardless of the current compilation's language.
791 /// (C++0x [basic.types]p9). Note that, unlike
792 /// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account.
793 bool isCXX11PODType(const ASTContext &Context) const;
794
795 /// Return true if this is a trivial type per (C++0x [basic.types]p9)
796 bool isTrivialType(const ASTContext &Context) const;
797
798 /// Return true if this is a trivially copyable type (C++0x [basic.types]p9)
799 bool isTriviallyCopyableType(const ASTContext &Context) const;
800
801
802 /// Returns true if it is a class and it might be dynamic.
803 bool mayBeDynamicClass() const;
804
805 /// Returns true if it is not a class or if the class might not be dynamic.
806 bool mayBeNotDynamicClass() const;
807
808 // Don't promise in the API that anything besides 'const' can be
809 // easily added.
810
811 /// Add the `const` type qualifier to this QualType.
812 void addConst() {
813 addFastQualifiers(Qualifiers::Const);
814 }
815 QualType withConst() const {
816 return withFastQualifiers(Qualifiers::Const);
817 }
818
819 /// Add the `volatile` type qualifier to this QualType.
820 void addVolatile() {
821 addFastQualifiers(Qualifiers::Volatile);
822 }
823 QualType withVolatile() const {
824 return withFastQualifiers(Qualifiers::Volatile);
825 }
826
827 /// Add the `restrict` qualifier to this QualType.
828 void addRestrict() {
829 addFastQualifiers(Qualifiers::Restrict);
830 }
831 QualType withRestrict() const {
832 return withFastQualifiers(Qualifiers::Restrict);
833 }
834
835 QualType withCVRQualifiers(unsigned CVR) const {
836 return withFastQualifiers(CVR);
837 }
838
839 void addFastQualifiers(unsigned TQs) {
840 assert(!(TQs & ~Qualifiers::FastMask)((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!"
) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 841, __PRETTY_FUNCTION__))
841 && "non-fast qualifier bits set in mask!")((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!"
) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 841, __PRETTY_FUNCTION__))
;
842 Value.setInt(Value.getInt() | TQs);
843 }
844
845 void removeLocalConst();
846 void removeLocalVolatile();
847 void removeLocalRestrict();
848 void removeLocalCVRQualifiers(unsigned Mask);
849
850 void removeLocalFastQualifiers() { Value.setInt(0); }
851 void removeLocalFastQualifiers(unsigned Mask) {
852 assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers")((!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers"
) ? static_cast<void> (0) : __assert_fail ("!(Mask & ~Qualifiers::FastMask) && \"mask has non-fast qualifiers\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 852, __PRETTY_FUNCTION__))
;
853 Value.setInt(Value.getInt() & ~Mask);
854 }
855
856 // Creates a type with the given qualifiers in addition to any
857 // qualifiers already on this type.
858 QualType withFastQualifiers(unsigned TQs) const {
859 QualType T = *this;
860 T.addFastQualifiers(TQs);
861 return T;
862 }
863
864 // Creates a type with exactly the given fast qualifiers, removing
865 // any existing fast qualifiers.
866 QualType withExactLocalFastQualifiers(unsigned TQs) const {
867 return withoutLocalFastQualifiers().withFastQualifiers(TQs);
868 }
869
870 // Removes fast qualifiers, but leaves any extended qualifiers in place.
871 QualType withoutLocalFastQualifiers() const {
872 QualType T = *this;
873 T.removeLocalFastQualifiers();
874 return T;
875 }
876
877 QualType getCanonicalType() const;
878
879 /// Return this type with all of the instance-specific qualifiers
880 /// removed, but without removing any qualifiers that may have been applied
881 /// through typedefs.
882 QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); }
883
884 /// Retrieve the unqualified variant of the given type,
885 /// removing as little sugar as possible.
886 ///
887 /// This routine looks through various kinds of sugar to find the
888 /// least-desugared type that is unqualified. For example, given:
889 ///
890 /// \code
891 /// typedef int Integer;
892 /// typedef const Integer CInteger;
893 /// typedef CInteger DifferenceType;
894 /// \endcode
895 ///
896 /// Executing \c getUnqualifiedType() on the type \c DifferenceType will
897 /// desugar until we hit the type \c Integer, which has no qualifiers on it.
898 ///
899 /// The resulting type might still be qualified if it's sugar for an array
900 /// type. To strip qualifiers even from within a sugared array type, use
901 /// ASTContext::getUnqualifiedArrayType.
902 inline QualType getUnqualifiedType() const;
903
904 /// Retrieve the unqualified variant of the given type, removing as little
905 /// sugar as possible.
906 ///
907 /// Like getUnqualifiedType(), but also returns the set of
908 /// qualifiers that were built up.
909 ///
910 /// The resulting type might still be qualified if it's sugar for an array
911 /// type. To strip qualifiers even from within a sugared array type, use
912 /// ASTContext::getUnqualifiedArrayType.
913 inline SplitQualType getSplitUnqualifiedType() const;
914
915 /// Determine whether this type is more qualified than the other
916 /// given type, requiring exact equality for non-CVR qualifiers.
917 bool isMoreQualifiedThan(QualType Other) const;
918
919 /// Determine whether this type is at least as qualified as the other
920 /// given type, requiring exact equality for non-CVR qualifiers.
921 bool isAtLeastAsQualifiedAs(QualType Other) const;
922
923 QualType getNonReferenceType() const;
924
925 /// Determine the type of a (typically non-lvalue) expression with the
926 /// specified result type.
927 ///
928 /// This routine should be used for expressions for which the return type is
929 /// explicitly specified (e.g., in a cast or call) and isn't necessarily
930 /// an lvalue. It removes a top-level reference (since there are no
931 /// expressions of reference type) and deletes top-level cvr-qualifiers
932 /// from non-class types (in C++) or all types (in C).
933 QualType getNonLValueExprType(const ASTContext &Context) const;
934
935 /// Return the specified type with any "sugar" removed from
936 /// the type. This takes off typedefs, typeof's etc. If the outer level of
937 /// the type is already concrete, it returns it unmodified. This is similar
938 /// to getting the canonical type, but it doesn't remove *all* typedefs. For
939 /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is
940 /// concrete.
941 ///
942 /// Qualifiers are left in place.
943 QualType getDesugaredType(const ASTContext &Context) const {
944 return getDesugaredType(*this, Context);
945 }
946
947 SplitQualType getSplitDesugaredType() const {
948 return getSplitDesugaredType(*this);
949 }
950
951 /// Return the specified type with one level of "sugar" removed from
952 /// the type.
953 ///
954 /// This routine takes off the first typedef, typeof, etc. If the outer level
955 /// of the type is already concrete, it returns it unmodified.
956 QualType getSingleStepDesugaredType(const ASTContext &Context) const {
957 return getSingleStepDesugaredTypeImpl(*this, Context);
958 }
959
960 /// Returns the specified type after dropping any
961 /// outer-level parentheses.
962 QualType IgnoreParens() const {
963 if (isa<ParenType>(*this))
964 return QualType::IgnoreParens(*this);
965 return *this;
966 }
967
968 /// Indicate whether the specified types and qualifiers are identical.
969 friend bool operator==(const QualType &LHS, const QualType &RHS) {
970 return LHS.Value == RHS.Value;
971 }
972 friend bool operator!=(const QualType &LHS, const QualType &RHS) {
973 return LHS.Value != RHS.Value;
974 }
975 friend bool operator<(const QualType &LHS, const QualType &RHS) {
976 return LHS.Value < RHS.Value;
977 }
978
979 static std::string getAsString(SplitQualType split,
980 const PrintingPolicy &Policy) {
981 return getAsString(split.Ty, split.Quals, Policy);
982 }
983 static std::string getAsString(const Type *ty, Qualifiers qs,
984 const PrintingPolicy &Policy);
985
986 std::string getAsString() const;
987 std::string getAsString(const PrintingPolicy &Policy) const;
988
989 void print(raw_ostream &OS, const PrintingPolicy &Policy,
990 const Twine &PlaceHolder = Twine(),
991 unsigned Indentation = 0) const;
992
993 static void print(SplitQualType split, raw_ostream &OS,
994 const PrintingPolicy &policy, const Twine &PlaceHolder,
995 unsigned Indentation = 0) {
996 return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation);
997 }
998
999 static void print(const Type *ty, Qualifiers qs,
1000 raw_ostream &OS, const PrintingPolicy &policy,
1001 const Twine &PlaceHolder,
1002 unsigned Indentation = 0);
1003
1004 void getAsStringInternal(std::string &Str,
1005 const PrintingPolicy &Policy) const;
1006
1007 static void getAsStringInternal(SplitQualType split, std::string &out,
1008 const PrintingPolicy &policy) {
1009 return getAsStringInternal(split.Ty, split.Quals, out, policy);
1010 }
1011
1012 static void getAsStringInternal(const Type *ty, Qualifiers qs,
1013 std::string &out,
1014 const PrintingPolicy &policy);
1015
1016 class StreamedQualTypeHelper {
1017 const QualType &T;
1018 const PrintingPolicy &Policy;
1019 const Twine &PlaceHolder;
1020 unsigned Indentation;
1021
1022 public:
1023 StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy,
1024 const Twine &PlaceHolder, unsigned Indentation)
1025 : T(T), Policy(Policy), PlaceHolder(PlaceHolder),
1026 Indentation(Indentation) {}
1027
1028 friend raw_ostream &operator<<(raw_ostream &OS,
1029 const StreamedQualTypeHelper &SQT) {
1030 SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation);
1031 return OS;
1032 }
1033 };
1034
1035 StreamedQualTypeHelper stream(const PrintingPolicy &Policy,
1036 const Twine &PlaceHolder = Twine(),
1037 unsigned Indentation = 0) const {
1038 return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation);
1039 }
1040
1041 void dump(const char *s) const;
1042 void dump() const;
1043 void dump(llvm::raw_ostream &OS) const;
1044
1045 void Profile(llvm::FoldingSetNodeID &ID) const {
1046 ID.AddPointer(getAsOpaquePtr());
1047 }
1048
1049 /// Return the address space of this type.
1050 inline LangAS getAddressSpace() const;
1051
1052 /// Returns gc attribute of this type.
1053 inline Qualifiers::GC getObjCGCAttr() const;
1054
1055 /// true when Type is objc's weak.
1056 bool isObjCGCWeak() const {
1057 return getObjCGCAttr() == Qualifiers::Weak;
1058 }
1059
1060 /// true when Type is objc's strong.
1061 bool isObjCGCStrong() const {
1062 return getObjCGCAttr() == Qualifiers::Strong;
1063 }
1064
1065 /// Returns lifetime attribute of this type.
1066 Qualifiers::ObjCLifetime getObjCLifetime() const {
1067 return getQualifiers().getObjCLifetime();
1068 }
1069
1070 bool hasNonTrivialObjCLifetime() const {
1071 return getQualifiers().hasNonTrivialObjCLifetime();
1072 }
1073
1074 bool hasStrongOrWeakObjCLifetime() const {
1075 return getQualifiers().hasStrongOrWeakObjCLifetime();
1076 }
1077
1078 // true when Type is objc's weak and weak is enabled but ARC isn't.
1079 bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const;
1080
1081 enum PrimitiveDefaultInitializeKind {
1082 /// The type does not fall into any of the following categories. Note that
1083 /// this case is zero-valued so that values of this enum can be used as a
1084 /// boolean condition for non-triviality.
1085 PDIK_Trivial,
1086
1087 /// The type is an Objective-C retainable pointer type that is qualified
1088 /// with the ARC __strong qualifier.
1089 PDIK_ARCStrong,
1090
1091 /// The type is an Objective-C retainable pointer type that is qualified
1092 /// with the ARC __weak qualifier.
1093 PDIK_ARCWeak,
1094
1095 /// The type is a struct containing a field whose type is not PCK_Trivial.
1096 PDIK_Struct
1097 };
1098
1099 /// Functions to query basic properties of non-trivial C struct types.
1100
1101 /// Check if this is a non-trivial type that would cause a C struct
1102 /// transitively containing this type to be non-trivial to default initialize
1103 /// and return the kind.
1104 PrimitiveDefaultInitializeKind
1105 isNonTrivialToPrimitiveDefaultInitialize() const;
1106
1107 enum PrimitiveCopyKind {
1108 /// The type does not fall into any of the following categories. Note that
1109 /// this case is zero-valued so that values of this enum can be used as a
1110 /// boolean condition for non-triviality.
1111 PCK_Trivial,
1112
1113 /// The type would be trivial except that it is volatile-qualified. Types
1114 /// that fall into one of the other non-trivial cases may additionally be
1115 /// volatile-qualified.
1116 PCK_VolatileTrivial,
1117
1118 /// The type is an Objective-C retainable pointer type that is qualified
1119 /// with the ARC __strong qualifier.
1120 PCK_ARCStrong,
1121
1122 /// The type is an Objective-C retainable pointer type that is qualified
1123 /// with the ARC __weak qualifier.
1124 PCK_ARCWeak,
1125
1126 /// The type is a struct containing a field whose type is neither
1127 /// PCK_Trivial nor PCK_VolatileTrivial.
1128 /// Note that a C++ struct type does not necessarily match this; C++ copying
1129 /// semantics are too complex to express here, in part because they depend
1130 /// on the exact constructor or assignment operator that is chosen by
1131 /// overload resolution to do the copy.
1132 PCK_Struct
1133 };
1134
1135 /// Check if this is a non-trivial type that would cause a C struct
1136 /// transitively containing this type to be non-trivial to copy and return the
1137 /// kind.
1138 PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const;
1139
1140 /// Check if this is a non-trivial type that would cause a C struct
1141 /// transitively containing this type to be non-trivial to destructively
1142 /// move and return the kind. Destructive move in this context is a C++-style
1143 /// move in which the source object is placed in a valid but unspecified state
1144 /// after it is moved, as opposed to a truly destructive move in which the
1145 /// source object is placed in an uninitialized state.
1146 PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const;
1147
1148 enum DestructionKind {
1149 DK_none,
1150 DK_cxx_destructor,
1151 DK_objc_strong_lifetime,
1152 DK_objc_weak_lifetime,
1153 DK_nontrivial_c_struct
1154 };
1155
1156 /// Returns a nonzero value if objects of this type require
1157 /// non-trivial work to clean up after. Non-zero because it's
1158 /// conceivable that qualifiers (objc_gc(weak)?) could make
1159 /// something require destruction.
1160 DestructionKind isDestructedType() const {
1161 return isDestructedTypeImpl(*this);
1162 }
1163
1164 /// Check if this is or contains a C union that is non-trivial to
1165 /// default-initialize, which is a union that has a member that is non-trivial
1166 /// to default-initialize. If this returns true,
1167 /// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct.
1168 bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const;
1169
1170 /// Check if this is or contains a C union that is non-trivial to destruct,
1171 /// which is a union that has a member that is non-trivial to destruct. If
1172 /// this returns true, isDestructedType returns DK_nontrivial_c_struct.
1173 bool hasNonTrivialToPrimitiveDestructCUnion() const;
1174
1175 /// Check if this is or contains a C union that is non-trivial to copy, which
1176 /// is a union that has a member that is non-trivial to copy. If this returns
1177 /// true, isNonTrivialToPrimitiveCopy returns PCK_Struct.
1178 bool hasNonTrivialToPrimitiveCopyCUnion() const;
1179
1180 /// Determine whether expressions of the given type are forbidden
1181 /// from being lvalues in C.
1182 ///
1183 /// The expression types that are forbidden to be lvalues are:
1184 /// - 'void', but not qualified void
1185 /// - function types
1186 ///
1187 /// The exact rule here is C99 6.3.2.1:
1188 /// An lvalue is an expression with an object type or an incomplete
1189 /// type other than void.
1190 bool isCForbiddenLValueType() const;
1191
1192 /// Substitute type arguments for the Objective-C type parameters used in the
1193 /// subject type.
1194 ///
1195 /// \param ctx ASTContext in which the type exists.
1196 ///
1197 /// \param typeArgs The type arguments that will be substituted for the
1198 /// Objective-C type parameters in the subject type, which are generally
1199 /// computed via \c Type::getObjCSubstitutions. If empty, the type
1200 /// parameters will be replaced with their bounds or id/Class, as appropriate
1201 /// for the context.
1202 ///
1203 /// \param context The context in which the subject type was written.
1204 ///
1205 /// \returns the resulting type.
1206 QualType substObjCTypeArgs(ASTContext &ctx,
1207 ArrayRef<QualType> typeArgs,
1208 ObjCSubstitutionContext context) const;
1209
1210 /// Substitute type arguments from an object type for the Objective-C type
1211 /// parameters used in the subject type.
1212 ///
1213 /// This operation combines the computation of type arguments for
1214 /// substitution (\c Type::getObjCSubstitutions) with the actual process of
1215 /// substitution (\c QualType::substObjCTypeArgs) for the convenience of
1216 /// callers that need to perform a single substitution in isolation.
1217 ///
1218 /// \param objectType The type of the object whose member type we're
1219 /// substituting into. For example, this might be the receiver of a message
1220 /// or the base of a property access.
1221 ///
1222 /// \param dc The declaration context from which the subject type was
1223 /// retrieved, which indicates (for example) which type parameters should
1224 /// be substituted.
1225 ///
1226 /// \param context The context in which the subject type was written.
1227 ///
1228 /// \returns the subject type after replacing all of the Objective-C type
1229 /// parameters with their corresponding arguments.
1230 QualType substObjCMemberType(QualType objectType,
1231 const DeclContext *dc,
1232 ObjCSubstitutionContext context) const;
1233
1234 /// Strip Objective-C "__kindof" types from the given type.
1235 QualType stripObjCKindOfType(const ASTContext &ctx) const;
1236
1237 /// Remove all qualifiers including _Atomic.
1238 QualType getAtomicUnqualifiedType() const;
1239
1240private:
1241 // These methods are implemented in a separate translation unit;
1242 // "static"-ize them to avoid creating temporary QualTypes in the
1243 // caller.
1244 static bool isConstant(QualType T, const ASTContext& Ctx);
1245 static QualType getDesugaredType(QualType T, const ASTContext &Context);
1246 static SplitQualType getSplitDesugaredType(QualType T);
1247 static SplitQualType getSplitUnqualifiedTypeImpl(QualType type);
1248 static QualType getSingleStepDesugaredTypeImpl(QualType type,
1249 const ASTContext &C);
1250 static QualType IgnoreParens(QualType T);
1251 static DestructionKind isDestructedTypeImpl(QualType type);
1252
1253 /// Check if \param RD is or contains a non-trivial C union.
1254 static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD);
1255 static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD);
1256 static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD);
1257};
1258
1259} // namespace clang
1260
1261namespace llvm {
1262
1263/// Implement simplify_type for QualType, so that we can dyn_cast from QualType
1264/// to a specific Type class.
1265template<> struct simplify_type< ::clang::QualType> {
1266 using SimpleType = const ::clang::Type *;
1267
1268 static SimpleType getSimplifiedValue(::clang::QualType Val) {
1269 return Val.getTypePtr();
1270 }
1271};
1272
1273// Teach SmallPtrSet that QualType is "basically a pointer".
1274template<>
1275struct PointerLikeTypeTraits<clang::QualType> {
1276 static inline void *getAsVoidPointer(clang::QualType P) {
1277 return P.getAsOpaquePtr();
1278 }
1279
1280 static inline clang::QualType getFromVoidPointer(void *P) {
1281 return clang::QualType::getFromOpaquePtr(P);
1282 }
1283
1284 // Various qualifiers go in low bits.
1285 enum { NumLowBitsAvailable = 0 };
1286};
1287
1288} // namespace llvm
1289
1290namespace clang {
1291
1292/// Base class that is common to both the \c ExtQuals and \c Type
1293/// classes, which allows \c QualType to access the common fields between the
1294/// two.
1295class ExtQualsTypeCommonBase {
1296 friend class ExtQuals;
1297 friend class QualType;
1298 friend class Type;
1299
1300 /// The "base" type of an extended qualifiers type (\c ExtQuals) or
1301 /// a self-referential pointer (for \c Type).
1302 ///
1303 /// This pointer allows an efficient mapping from a QualType to its
1304 /// underlying type pointer.
1305 const Type *const BaseType;
1306
1307 /// The canonical type of this type. A QualType.
1308 QualType CanonicalType;
1309
1310 ExtQualsTypeCommonBase(const Type *baseType, QualType canon)
1311 : BaseType(baseType), CanonicalType(canon) {}
1312};
1313
1314/// We can encode up to four bits in the low bits of a
1315/// type pointer, but there are many more type qualifiers that we want
1316/// to be able to apply to an arbitrary type. Therefore we have this
1317/// struct, intended to be heap-allocated and used by QualType to
1318/// store qualifiers.
1319///
1320/// The current design tags the 'const', 'restrict', and 'volatile' qualifiers
1321/// in three low bits on the QualType pointer; a fourth bit records whether
1322/// the pointer is an ExtQuals node. The extended qualifiers (address spaces,
1323/// Objective-C GC attributes) are much more rare.
1324class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode {
1325 // NOTE: changing the fast qualifiers should be straightforward as
1326 // long as you don't make 'const' non-fast.
1327 // 1. Qualifiers:
1328 // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ).
1329 // Fast qualifiers must occupy the low-order bits.
1330 // b) Update Qualifiers::FastWidth and FastMask.
1331 // 2. QualType:
1332 // a) Update is{Volatile,Restrict}Qualified(), defined inline.
1333 // b) Update remove{Volatile,Restrict}, defined near the end of
1334 // this header.
1335 // 3. ASTContext:
1336 // a) Update get{Volatile,Restrict}Type.
1337
1338 /// The immutable set of qualifiers applied by this node. Always contains
1339 /// extended qualifiers.
1340 Qualifiers Quals;
1341
1342 ExtQuals *this_() { return this; }
1343
1344public:
1345 ExtQuals(const Type *baseType, QualType canon, Qualifiers quals)
1346 : ExtQualsTypeCommonBase(baseType,
1347 canon.isNull() ? QualType(this_(), 0) : canon),
1348 Quals(quals) {
1349 assert(Quals.hasNonFastQualifiers()((Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers"
) ? static_cast<void> (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 1350, __PRETTY_FUNCTION__))
1350 && "ExtQuals created with no fast qualifiers")((Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers"
) ? static_cast<void> (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 1350, __PRETTY_FUNCTION__))
;
1351 assert(!Quals.hasFastQualifiers()((!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers"
) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 1352, __PRETTY_FUNCTION__))
1352 && "ExtQuals created with fast qualifiers")((!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers"
) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 1352, __PRETTY_FUNCTION__))
;
1353 }
1354
1355 Qualifiers getQualifiers() const { return Quals; }
1356
1357 bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); }
1358 Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); }
1359
1360 bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); }
1361 Qualifiers::ObjCLifetime getObjCLifetime() const {
1362 return Quals.getObjCLifetime();
1363 }
1364
1365 bool hasAddressSpace() const { return Quals.hasAddressSpace(); }
1366 LangAS getAddressSpace() const { return Quals.getAddressSpace(); }
1367
1368 const Type *getBaseType() const { return BaseType; }
1369
1370public:
1371 void Profile(llvm::FoldingSetNodeID &ID) const {
1372 Profile(ID, getBaseType(), Quals);
1373 }
1374
1375 static void Profile(llvm::FoldingSetNodeID &ID,
1376 const Type *BaseType,
1377 Qualifiers Quals) {
1378 assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!")((!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!"
) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"fast qualifiers in ExtQuals hash!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 1378, __PRETTY_FUNCTION__))
;
1379 ID.AddPointer(BaseType);
1380 Quals.Profile(ID);
1381 }
1382};
1383
1384/// The kind of C++11 ref-qualifier associated with a function type.
1385/// This determines whether a member function's "this" object can be an
1386/// lvalue, rvalue, or neither.
1387enum RefQualifierKind {
1388 /// No ref-qualifier was provided.
1389 RQ_None = 0,
1390
1391 /// An lvalue ref-qualifier was provided (\c &).
1392 RQ_LValue,
1393
1394 /// An rvalue ref-qualifier was provided (\c &&).
1395 RQ_RValue
1396};
1397
1398/// Which keyword(s) were used to create an AutoType.
1399enum class AutoTypeKeyword {
1400 /// auto
1401 Auto,
1402
1403 /// decltype(auto)
1404 DecltypeAuto,
1405
1406 /// __auto_type (GNU extension)
1407 GNUAutoType
1408};
1409
1410/// The base class of the type hierarchy.
1411///
1412/// A central concept with types is that each type always has a canonical
1413/// type. A canonical type is the type with any typedef names stripped out
1414/// of it or the types it references. For example, consider:
1415///
1416/// typedef int foo;
1417/// typedef foo* bar;
1418/// 'int *' 'foo *' 'bar'
1419///
1420/// There will be a Type object created for 'int'. Since int is canonical, its
1421/// CanonicalType pointer points to itself. There is also a Type for 'foo' (a
1422/// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next
1423/// there is a PointerType that represents 'int*', which, like 'int', is
1424/// canonical. Finally, there is a PointerType type for 'foo*' whose canonical
1425/// type is 'int*', and there is a TypedefType for 'bar', whose canonical type
1426/// is also 'int*'.
1427///
1428/// Non-canonical types are useful for emitting diagnostics, without losing
1429/// information about typedefs being used. Canonical types are useful for type
1430/// comparisons (they allow by-pointer equality tests) and useful for reasoning
1431/// about whether something has a particular form (e.g. is a function type),
1432/// because they implicitly, recursively, strip all typedefs out of a type.
1433///
1434/// Types, once created, are immutable.
1435///
1436class alignas(8) Type : public ExtQualsTypeCommonBase {
1437public:
1438 enum TypeClass {
1439#define TYPE(Class, Base) Class,
1440#define LAST_TYPE(Class) TypeLast = Class
1441#define ABSTRACT_TYPE(Class, Base)
1442#include "clang/AST/TypeNodes.inc"
1443 };
1444
1445private:
1446 /// Bitfields required by the Type class.
1447 class TypeBitfields {
1448 friend class Type;
1449 template <class T> friend class TypePropertyCache;
1450
1451 /// TypeClass bitfield - Enum that specifies what subclass this belongs to.
1452 unsigned TC : 8;
1453
1454 /// Whether this type is a dependent type (C++ [temp.dep.type]).
1455 unsigned Dependent : 1;
1456
1457 /// Whether this type somehow involves a template parameter, even
1458 /// if the resolution of the type does not depend on a template parameter.
1459 unsigned InstantiationDependent : 1;
1460
1461 /// Whether this type is a variably-modified type (C99 6.7.5).
1462 unsigned VariablyModified : 1;
1463
1464 /// Whether this type contains an unexpanded parameter pack
1465 /// (for C++11 variadic templates).
1466 unsigned ContainsUnexpandedParameterPack : 1;
1467
1468 /// True if the cache (i.e. the bitfields here starting with
1469 /// 'Cache') is valid.
1470 mutable unsigned CacheValid : 1;
1471
1472 /// Linkage of this type.
1473 mutable unsigned CachedLinkage : 3;
1474
1475 /// Whether this type involves and local or unnamed types.
1476 mutable unsigned CachedLocalOrUnnamed : 1;
1477
1478 /// Whether this type comes from an AST file.
1479 mutable unsigned FromAST : 1;
1480
1481 bool isCacheValid() const {
1482 return CacheValid;
1483 }
1484
1485 Linkage getLinkage() const {
1486 assert(isCacheValid() && "getting linkage from invalid cache")((isCacheValid() && "getting linkage from invalid cache"
) ? static_cast<void> (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 1486, __PRETTY_FUNCTION__))
;
1487 return static_cast<Linkage>(CachedLinkage);
1488 }
1489
1490 bool hasLocalOrUnnamedType() const {
1491 assert(isCacheValid() && "getting linkage from invalid cache")((isCacheValid() && "getting linkage from invalid cache"
) ? static_cast<void> (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 1491, __PRETTY_FUNCTION__))
;
1492 return CachedLocalOrUnnamed;
1493 }
1494 };
1495 enum { NumTypeBits = 18 };
1496
1497protected:
1498 // These classes allow subclasses to somewhat cleanly pack bitfields
1499 // into Type.
1500
1501 class ArrayTypeBitfields {
1502 friend class ArrayType;
1503
1504 unsigned : NumTypeBits;
1505
1506 /// CVR qualifiers from declarations like
1507 /// 'int X[static restrict 4]'. For function parameters only.
1508 unsigned IndexTypeQuals : 3;
1509
1510 /// Storage class qualifiers from declarations like
1511 /// 'int X[static restrict 4]'. For function parameters only.
1512 /// Actually an ArrayType::ArraySizeModifier.
1513 unsigned SizeModifier : 3;
1514 };
1515
1516 class BuiltinTypeBitfields {
1517 friend class BuiltinType;
1518
1519 unsigned : NumTypeBits;
1520
1521 /// The kind (BuiltinType::Kind) of builtin type this is.
1522 unsigned Kind : 8;
1523 };
1524
1525 /// FunctionTypeBitfields store various bits belonging to FunctionProtoType.
1526 /// Only common bits are stored here. Additional uncommon bits are stored
1527 /// in a trailing object after FunctionProtoType.
1528 class FunctionTypeBitfields {
1529 friend class FunctionProtoType;
1530 friend class FunctionType;
1531
1532 unsigned : NumTypeBits;
1533
1534 /// Extra information which affects how the function is called, like
1535 /// regparm and the calling convention.
1536 unsigned ExtInfo : 12;
1537
1538 /// The ref-qualifier associated with a \c FunctionProtoType.
1539 ///
1540 /// This is a value of type \c RefQualifierKind.
1541 unsigned RefQualifier : 2;
1542
1543 /// Used only by FunctionProtoType, put here to pack with the
1544 /// other bitfields.
1545 /// The qualifiers are part of FunctionProtoType because...
1546 ///
1547 /// C++ 8.3.5p4: The return type, the parameter type list and the
1548 /// cv-qualifier-seq, [...], are part of the function type.
1549 unsigned FastTypeQuals : Qualifiers::FastWidth;
1550 /// Whether this function has extended Qualifiers.
1551 unsigned HasExtQuals : 1;
1552
1553 /// The number of parameters this function has, not counting '...'.
1554 /// According to [implimits] 8 bits should be enough here but this is
1555 /// somewhat easy to exceed with metaprogramming and so we would like to
1556 /// keep NumParams as wide as reasonably possible.
1557 unsigned NumParams : 16;
1558
1559 /// The type of exception specification this function has.
1560 unsigned ExceptionSpecType : 4;
1561
1562 /// Whether this function has extended parameter information.
1563 unsigned HasExtParameterInfos : 1;
1564
1565 /// Whether the function is variadic.
1566 unsigned Variadic : 1;
1567
1568 /// Whether this function has a trailing return type.
1569 unsigned HasTrailingReturn : 1;
1570 };
1571
1572 class ObjCObjectTypeBitfields {
1573 friend class ObjCObjectType;
1574
1575 unsigned : NumTypeBits;
1576
1577 /// The number of type arguments stored directly on this object type.
1578 unsigned NumTypeArgs : 7;
1579
1580 /// The number of protocols stored directly on this object type.
1581 unsigned NumProtocols : 6;
1582
1583 /// Whether this is a "kindof" type.
1584 unsigned IsKindOf : 1;
1585 };
1586
1587 class ReferenceTypeBitfields {
1588 friend class ReferenceType;
1589
1590 unsigned : NumTypeBits;
1591
1592 /// True if the type was originally spelled with an lvalue sigil.
1593 /// This is never true of rvalue references but can also be false
1594 /// on lvalue references because of C++0x [dcl.typedef]p9,
1595 /// as follows:
1596 ///
1597 /// typedef int &ref; // lvalue, spelled lvalue
1598 /// typedef int &&rvref; // rvalue
1599 /// ref &a; // lvalue, inner ref, spelled lvalue
1600 /// ref &&a; // lvalue, inner ref
1601 /// rvref &a; // lvalue, inner ref, spelled lvalue
1602 /// rvref &&a; // rvalue, inner ref
1603 unsigned SpelledAsLValue : 1;
1604
1605 /// True if the inner type is a reference type. This only happens
1606 /// in non-canonical forms.
1607 unsigned InnerRef : 1;
1608 };
1609
1610 class TypeWithKeywordBitfields {
1611 friend class TypeWithKeyword;
1612
1613 unsigned : NumTypeBits;
1614
1615 /// An ElaboratedTypeKeyword. 8 bits for efficient access.
1616 unsigned Keyword : 8;
1617 };
1618
1619 enum { NumTypeWithKeywordBits = 8 };
1620
1621 class ElaboratedTypeBitfields {
1622 friend class ElaboratedType;
1623
1624 unsigned : NumTypeBits;
1625 unsigned : NumTypeWithKeywordBits;
1626
1627 /// Whether the ElaboratedType has a trailing OwnedTagDecl.
1628 unsigned HasOwnedTagDecl : 1;
1629 };
1630
1631 class VectorTypeBitfields {
1632 friend class VectorType;
1633 friend class DependentVectorType;
1634
1635 unsigned : NumTypeBits;
1636
1637 /// The kind of vector, either a generic vector type or some
1638 /// target-specific vector type such as for AltiVec or Neon.
1639 unsigned VecKind : 3;
1640
1641 /// The number of elements in the vector.
1642 unsigned NumElements : 29 - NumTypeBits;
1643
1644 enum { MaxNumElements = (1 << (29 - NumTypeBits)) - 1 };
1645 };
1646
1647 class AttributedTypeBitfields {
1648 friend class AttributedType;
1649
1650 unsigned : NumTypeBits;
1651
1652 /// An AttributedType::Kind
1653 unsigned AttrKind : 32 - NumTypeBits;
1654 };
1655
1656 class AutoTypeBitfields {
1657 friend class AutoType;
1658
1659 unsigned : NumTypeBits;
1660
1661 /// Was this placeholder type spelled as 'auto', 'decltype(auto)',
1662 /// or '__auto_type'? AutoTypeKeyword value.
1663 unsigned Keyword : 2;
1664 };
1665
1666 class SubstTemplateTypeParmPackTypeBitfields {
1667 friend class SubstTemplateTypeParmPackType;
1668
1669 unsigned : NumTypeBits;
1670
1671 /// The number of template arguments in \c Arguments, which is
1672 /// expected to be able to hold at least 1024 according to [implimits].
1673 /// However as this limit is somewhat easy to hit with template
1674 /// metaprogramming we'd prefer to keep it as large as possible.
1675 /// At the moment it has been left as a non-bitfield since this type
1676 /// safely fits in 64 bits as an unsigned, so there is no reason to
1677 /// introduce the performance impact of a bitfield.
1678 unsigned NumArgs;
1679 };
1680
1681 class TemplateSpecializationTypeBitfields {
1682 friend class TemplateSpecializationType;
1683
1684 unsigned : NumTypeBits;
1685
1686 /// Whether this template specialization type is a substituted type alias.
1687 unsigned TypeAlias : 1;
1688
1689 /// The number of template arguments named in this class template
1690 /// specialization, which is expected to be able to hold at least 1024
1691 /// according to [implimits]. However, as this limit is somewhat easy to
1692 /// hit with template metaprogramming we'd prefer to keep it as large
1693 /// as possible. At the moment it has been left as a non-bitfield since
1694 /// this type safely fits in 64 bits as an unsigned, so there is no reason
1695 /// to introduce the performance impact of a bitfield.
1696 unsigned NumArgs;
1697 };
1698
1699 class DependentTemplateSpecializationTypeBitfields {
1700 friend class DependentTemplateSpecializationType;
1701
1702 unsigned : NumTypeBits;
1703 unsigned : NumTypeWithKeywordBits;
1704
1705 /// The number of template arguments named in this class template
1706 /// specialization, which is expected to be able to hold at least 1024
1707 /// according to [implimits]. However, as this limit is somewhat easy to
1708 /// hit with template metaprogramming we'd prefer to keep it as large
1709 /// as possible. At the moment it has been left as a non-bitfield since
1710 /// this type safely fits in 64 bits as an unsigned, so there is no reason
1711 /// to introduce the performance impact of a bitfield.
1712 unsigned NumArgs;
1713 };
1714
1715 class PackExpansionTypeBitfields {
1716 friend class PackExpansionType;
1717
1718 unsigned : NumTypeBits;
1719
1720 /// The number of expansions that this pack expansion will
1721 /// generate when substituted (+1), which is expected to be able to
1722 /// hold at least 1024 according to [implimits]. However, as this limit
1723 /// is somewhat easy to hit with template metaprogramming we'd prefer to
1724 /// keep it as large as possible. At the moment it has been left as a
1725 /// non-bitfield since this type safely fits in 64 bits as an unsigned, so
1726 /// there is no reason to introduce the performance impact of a bitfield.
1727 ///
1728 /// This field will only have a non-zero value when some of the parameter
1729 /// packs that occur within the pattern have been substituted but others
1730 /// have not.
1731 unsigned NumExpansions;
1732 };
1733
1734 union {
1735 TypeBitfields TypeBits;
1736 ArrayTypeBitfields ArrayTypeBits;
1737 AttributedTypeBitfields AttributedTypeBits;
1738 AutoTypeBitfields AutoTypeBits;
1739 BuiltinTypeBitfields BuiltinTypeBits;
1740 FunctionTypeBitfields FunctionTypeBits;
1741 ObjCObjectTypeBitfields ObjCObjectTypeBits;
1742 ReferenceTypeBitfields ReferenceTypeBits;
1743 TypeWithKeywordBitfields TypeWithKeywordBits;
1744 ElaboratedTypeBitfields ElaboratedTypeBits;
1745 VectorTypeBitfields VectorTypeBits;
1746 SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits;
1747 TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits;
1748 DependentTemplateSpecializationTypeBitfields
1749 DependentTemplateSpecializationTypeBits;
1750 PackExpansionTypeBitfields PackExpansionTypeBits;
1751
1752 static_assert(sizeof(TypeBitfields) <= 8,
1753 "TypeBitfields is larger than 8 bytes!");
1754 static_assert(sizeof(ArrayTypeBitfields) <= 8,
1755 "ArrayTypeBitfields is larger than 8 bytes!");
1756 static_assert(sizeof(AttributedTypeBitfields) <= 8,
1757 "AttributedTypeBitfields is larger than 8 bytes!");
1758 static_assert(sizeof(AutoTypeBitfields) <= 8,
1759 "AutoTypeBitfields is larger than 8 bytes!");
1760 static_assert(sizeof(BuiltinTypeBitfields) <= 8,
1761 "BuiltinTypeBitfields is larger than 8 bytes!");
1762 static_assert(sizeof(FunctionTypeBitfields) <= 8,
1763 "FunctionTypeBitfields is larger than 8 bytes!");
1764 static_assert(sizeof(ObjCObjectTypeBitfields) <= 8,
1765 "ObjCObjectTypeBitfields is larger than 8 bytes!");
1766 static_assert(sizeof(ReferenceTypeBitfields) <= 8,
1767 "ReferenceTypeBitfields is larger than 8 bytes!");
1768 static_assert(sizeof(TypeWithKeywordBitfields) <= 8,
1769 "TypeWithKeywordBitfields is larger than 8 bytes!");
1770 static_assert(sizeof(ElaboratedTypeBitfields) <= 8,
1771 "ElaboratedTypeBitfields is larger than 8 bytes!");
1772 static_assert(sizeof(VectorTypeBitfields) <= 8,
1773 "VectorTypeBitfields is larger than 8 bytes!");
1774 static_assert(sizeof(SubstTemplateTypeParmPackTypeBitfields) <= 8,
1775 "SubstTemplateTypeParmPackTypeBitfields is larger"
1776 " than 8 bytes!");
1777 static_assert(sizeof(TemplateSpecializationTypeBitfields) <= 8,
1778 "TemplateSpecializationTypeBitfields is larger"
1779 " than 8 bytes!");
1780 static_assert(sizeof(DependentTemplateSpecializationTypeBitfields) <= 8,
1781 "DependentTemplateSpecializationTypeBitfields is larger"
1782 " than 8 bytes!");
1783 static_assert(sizeof(PackExpansionTypeBitfields) <= 8,
1784 "PackExpansionTypeBitfields is larger than 8 bytes");
1785 };
1786
1787private:
1788 template <class T> friend class TypePropertyCache;
1789
1790 /// Set whether this type comes from an AST file.
1791 void setFromAST(bool V = true) const {
1792 TypeBits.FromAST = V;
1793 }
1794
1795protected:
1796 friend class ASTContext;
1797
1798 Type(TypeClass tc, QualType canon, bool Dependent,
1799 bool InstantiationDependent, bool VariablyModified,
1800 bool ContainsUnexpandedParameterPack)
1801 : ExtQualsTypeCommonBase(this,
1802 canon.isNull() ? QualType(this_(), 0) : canon) {
1803 TypeBits.TC = tc;
1804 TypeBits.Dependent = Dependent;
1805 TypeBits.InstantiationDependent = Dependent || InstantiationDependent;
1806 TypeBits.VariablyModified = VariablyModified;
1807 TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack;
1808 TypeBits.CacheValid = false;
1809 TypeBits.CachedLocalOrUnnamed = false;
1810 TypeBits.CachedLinkage = NoLinkage;
1811 TypeBits.FromAST = false;
1812 }
1813
1814 // silence VC++ warning C4355: 'this' : used in base member initializer list
1815 Type *this_() { return this; }
1816
1817 void setDependent(bool D = true) {
1818 TypeBits.Dependent = D;
1819 if (D)
1820 TypeBits.InstantiationDependent = true;
1821 }
1822
1823 void setInstantiationDependent(bool D = true) {
1824 TypeBits.InstantiationDependent = D; }
1825
1826 void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; }
1827
1828 void setContainsUnexpandedParameterPack(bool PP = true) {
1829 TypeBits.ContainsUnexpandedParameterPack = PP;
1830 }
1831
1832public:
1833 friend class ASTReader;
1834 friend class ASTWriter;
1835
1836 Type(const Type &) = delete;
1837 Type(Type &&) = delete;
1838 Type &operator=(const Type &) = delete;
1839 Type &operator=(Type &&) = delete;
1840
1841 TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); }
1842
1843 /// Whether this type comes from an AST file.
1844 bool isFromAST() const { return TypeBits.FromAST; }
1845
1846 /// Whether this type is or contains an unexpanded parameter
1847 /// pack, used to support C++0x variadic templates.
1848 ///
1849 /// A type that contains a parameter pack shall be expanded by the
1850 /// ellipsis operator at some point. For example, the typedef in the
1851 /// following example contains an unexpanded parameter pack 'T':
1852 ///
1853 /// \code
1854 /// template<typename ...T>
1855 /// struct X {
1856 /// typedef T* pointer_types; // ill-formed; T is a parameter pack.
1857 /// };
1858 /// \endcode
1859 ///
1860 /// Note that this routine does not specify which
1861 bool containsUnexpandedParameterPack() const {
1862 return TypeBits.ContainsUnexpandedParameterPack;
1863 }
1864
1865 /// Determines if this type would be canonical if it had no further
1866 /// qualification.
1867 bool isCanonicalUnqualified() const {
1868 return CanonicalType == QualType(this, 0);
1869 }
1870
1871 /// Pull a single level of sugar off of this locally-unqualified type.
1872 /// Users should generally prefer SplitQualType::getSingleStepDesugaredType()
1873 /// or QualType::getSingleStepDesugaredType(const ASTContext&).
1874 QualType getLocallyUnqualifiedSingleStepDesugaredType() const;
1875
1876 /// Types are partitioned into 3 broad categories (C99 6.2.5p1):
1877 /// object types, function types, and incomplete types.
1878
1879 /// Return true if this is an incomplete type.
1880 /// A type that can describe objects, but which lacks information needed to
1881 /// determine its size (e.g. void, or a fwd declared struct). Clients of this
1882 /// routine will need to determine if the size is actually required.
1883 ///
1884 /// Def If non-null, and the type refers to some kind of declaration
1885 /// that can be completed (such as a C struct, C++ class, or Objective-C
1886 /// class), will be set to the declaration.
1887 bool isIncompleteType(NamedDecl **Def = nullptr) const;
1888
1889 /// Return true if this is an incomplete or object
1890 /// type, in other words, not a function type.
1891 bool isIncompleteOrObjectType() const {
1892 return !isFunctionType();
1893 }
1894
1895 /// Determine whether this type is an object type.
1896 bool isObjectType() const {
1897 // C++ [basic.types]p8:
1898 // An object type is a (possibly cv-qualified) type that is not a
1899 // function type, not a reference type, and not a void type.
1900 return !isReferenceType() && !isFunctionType() && !isVoidType();
1901 }
1902
1903 /// Return true if this is a literal type
1904 /// (C++11 [basic.types]p10)
1905 bool isLiteralType(const ASTContext &Ctx) const;
1906
1907 /// Test if this type is a standard-layout type.
1908 /// (C++0x [basic.type]p9)
1909 bool isStandardLayoutType() const;
1910
1911 /// Helper methods to distinguish type categories. All type predicates
1912 /// operate on the canonical type, ignoring typedefs and qualifiers.
1913
1914 /// Returns true if the type is a builtin type.
1915 bool isBuiltinType() const;
1916
1917 /// Test for a particular builtin type.
1918 bool isSpecificBuiltinType(unsigned K) const;
1919
1920 /// Test for a type which does not represent an actual type-system type but
1921 /// is instead used as a placeholder for various convenient purposes within
1922 /// Clang. All such types are BuiltinTypes.
1923 bool isPlaceholderType() const;
1924 const BuiltinType *getAsPlaceholderType() const;
1925
1926 /// Test for a specific placeholder type.
1927 bool isSpecificPlaceholderType(unsigned K) const;
1928
1929 /// Test for a placeholder type other than Overload; see
1930 /// BuiltinType::isNonOverloadPlaceholderType.
1931 bool isNonOverloadPlaceholderType() const;
1932
1933 /// isIntegerType() does *not* include complex integers (a GCC extension).
1934 /// isComplexIntegerType() can be used to test for complex integers.
1935 bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum)
1936 bool isEnumeralType() const;
1937
1938 /// Determine whether this type is a scoped enumeration type.
1939 bool isScopedEnumeralType() const;
1940 bool isBooleanType() const;
1941 bool isCharType() const;
1942 bool isWideCharType() const;
1943 bool isChar8Type() const;
1944 bool isChar16Type() const;
1945 bool isChar32Type() const;
1946 bool isAnyCharacterType() const;
1947 bool isIntegralType(const ASTContext &Ctx) const;
1948
1949 /// Determine whether this type is an integral or enumeration type.
1950 bool isIntegralOrEnumerationType() const;
1951
1952 /// Determine whether this type is an integral or unscoped enumeration type.
1953 bool isIntegralOrUnscopedEnumerationType() const;
1954
1955 /// Floating point categories.
1956 bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double)
1957 /// isComplexType() does *not* include complex integers (a GCC extension).
1958 /// isComplexIntegerType() can be used to test for complex integers.
1959 bool isComplexType() const; // C99 6.2.5p11 (complex)
1960 bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int.
1961 bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex)
1962 bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half)
1963 bool isFloat16Type() const; // C11 extension ISO/IEC TS 18661
1964 bool isFloat128Type() const;
1965 bool isRealType() const; // C99 6.2.5p17 (real floating + integer)
1966 bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating)
1967 bool isVoidType() const; // C99 6.2.5p19
1968 bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers)
1969 bool isAggregateType() const;
1970 bool isFundamentalType() const;
1971 bool isCompoundType() const;
1972
1973 // Type Predicates: Check to see if this type is structurally the specified
1974 // type, ignoring typedefs and qualifiers.
1975 bool isFunctionType() const;
1976 bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); }
1977 bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); }
1978 bool isPointerType() const;
1979 bool isAnyPointerType() const; // Any C pointer or ObjC object pointer
1980 bool isBlockPointerType() const;
1981 bool isVoidPointerType() const;
1982 bool isReferenceType() const;
1983 bool isLValueReferenceType() const;
1984 bool isRValueReferenceType() const;
1985 bool isFunctionPointerType() const;
1986 bool isFunctionReferenceType() const;
1987 bool isMemberPointerType() const;
1988 bool isMemberFunctionPointerType() const;
1989 bool isMemberDataPointerType() const;
1990 bool isArrayType() const;
1991 bool isConstantArrayType() const;
1992 bool isIncompleteArrayType() const;
1993 bool isVariableArrayType() const;
1994 bool isDependentSizedArrayType() const;
1995 bool isRecordType() const;
1996 bool isClassType() const;
1997 bool isStructureType() const;
1998 bool isObjCBoxableRecordType() const;
1999 bool isInterfaceType() const;
2000 bool isStructureOrClassType() const;
2001 bool isUnionType() const;
2002 bool isComplexIntegerType() const; // GCC _Complex integer type.
2003 bool isVectorType() const; // GCC vector type.
2004 bool isExtVectorType() const; // Extended vector type.
2005 bool isDependentAddressSpaceType() const; // value-dependent address space qualifier
2006 bool isObjCObjectPointerType() const; // pointer to ObjC object
2007 bool isObjCRetainableType() const; // ObjC object or block pointer
2008 bool isObjCLifetimeType() const; // (array of)* retainable type
2009 bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type
2010 bool isObjCNSObjectType() const; // __attribute__((NSObject))
2011 bool isObjCIndependentClassType() const; // __attribute__((objc_independent_class))
2012 // FIXME: change this to 'raw' interface type, so we can used 'interface' type
2013 // for the common case.
2014 bool isObjCObjectType() const; // NSString or typeof(*(id)0)
2015 bool isObjCQualifiedInterfaceType() const; // NSString<foo>
2016 bool isObjCQualifiedIdType() const; // id<foo>
2017 bool isObjCQualifiedClassType() const; // Class<foo>
2018 bool isObjCObjectOrInterfaceType() const;
2019 bool isObjCIdType() const; // id
2020 bool isDecltypeType() const;
2021 /// Was this type written with the special inert-in-ARC __unsafe_unretained
2022 /// qualifier?
2023 ///
2024 /// This approximates the answer to the following question: if this
2025 /// translation unit were compiled in ARC, would this type be qualified
2026 /// with __unsafe_unretained?
2027 bool isObjCInertUnsafeUnretainedType() const {
2028 return hasAttr(attr::ObjCInertUnsafeUnretained);
2029 }
2030
2031 /// Whether the type is Objective-C 'id' or a __kindof type of an
2032 /// object type, e.g., __kindof NSView * or __kindof id
2033 /// <NSCopying>.
2034 ///
2035 /// \param bound Will be set to the bound on non-id subtype types,
2036 /// which will be (possibly specialized) Objective-C class type, or
2037 /// null for 'id.
2038 bool isObjCIdOrObjectKindOfType(const ASTContext &ctx,
2039 const ObjCObjectType *&bound) const;
2040
2041 bool isObjCClassType() const; // Class
2042
2043 /// Whether the type is Objective-C 'Class' or a __kindof type of an
2044 /// Class type, e.g., __kindof Class <NSCopying>.
2045 ///
2046 /// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound
2047 /// here because Objective-C's type system cannot express "a class
2048 /// object for a subclass of NSFoo".
2049 bool isObjCClassOrClassKindOfType() const;
2050
2051 bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const;
2052 bool isObjCSelType() const; // Class
2053 bool isObjCBuiltinType() const; // 'id' or 'Class'
2054 bool isObjCARCBridgableType() const;
2055 bool isCARCBridgableType() const;
2056 bool isTemplateTypeParmType() const; // C++ template type parameter
2057 bool isNullPtrType() const; // C++11 std::nullptr_t
2058 bool isNothrowT() const; // C++ std::nothrow_t
2059 bool isAlignValT() const; // C++17 std::align_val_t
2060 bool isStdByteType() const; // C++17 std::byte
2061 bool isAtomicType() const; // C11 _Atomic()
2062
2063#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
2064 bool is##Id##Type() const;
2065#include "clang/Basic/OpenCLImageTypes.def"
2066
2067 bool isImageType() const; // Any OpenCL image type
2068
2069 bool isSamplerT() const; // OpenCL sampler_t
2070 bool isEventT() const; // OpenCL event_t
2071 bool isClkEventT() const; // OpenCL clk_event_t
2072 bool isQueueT() const; // OpenCL queue_t
2073 bool isReserveIDT() const; // OpenCL reserve_id_t
2074
2075#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
2076 bool is##Id##Type() const;
2077#include "clang/Basic/OpenCLExtensionTypes.def"
2078 // Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension
2079 bool isOCLIntelSubgroupAVCType() const;
2080 bool isOCLExtOpaqueType() const; // Any OpenCL extension type
2081
2082 bool isPipeType() const; // OpenCL pipe type
2083 bool isOpenCLSpecificType() const; // Any OpenCL specific type
2084
2085 /// Determines if this type, which must satisfy
2086 /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather
2087 /// than implicitly __strong.
2088 bool isObjCARCImplicitlyUnretainedType() const;
2089
2090 /// Return the implicit lifetime for this type, which must not be dependent.
2091 Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const;
2092
2093 enum ScalarTypeKind {
2094 STK_CPointer,
2095 STK_BlockPointer,
2096 STK_ObjCObjectPointer,
2097 STK_MemberPointer,
2098 STK_Bool,
2099 STK_Integral,
2100 STK_Floating,
2101 STK_IntegralComplex,
2102 STK_FloatingComplex,
2103 STK_FixedPoint
2104 };
2105
2106 /// Given that this is a scalar type, classify it.
2107 ScalarTypeKind getScalarTypeKind() const;
2108
2109 /// Whether this type is a dependent type, meaning that its definition
2110 /// somehow depends on a template parameter (C++ [temp.dep.type]).
2111 bool isDependentType() const { return TypeBits.Dependent; }
2112
2113 /// Determine whether this type is an instantiation-dependent type,
2114 /// meaning that the type involves a template parameter (even if the
2115 /// definition does not actually depend on the type substituted for that
2116 /// template parameter).
2117 bool isInstantiationDependentType() const {
2118 return TypeBits.InstantiationDependent;
2119 }
2120
2121 /// Determine whether this type is an undeduced type, meaning that
2122 /// it somehow involves a C++11 'auto' type or similar which has not yet been
2123 /// deduced.
2124 bool isUndeducedType() const;
2125
2126 /// Whether this type is a variably-modified type (C99 6.7.5).
2127 bool isVariablyModifiedType() const { return TypeBits.VariablyModified; }
2128
2129 /// Whether this type involves a variable-length array type
2130 /// with a definite size.
2131 bool hasSizedVLAType() const;
2132
2133 /// Whether this type is or contains a local or unnamed type.
2134 bool hasUnnamedOrLocalType() const;
2135
2136 bool isOverloadableType() const;
2137
2138 /// Determine wither this type is a C++ elaborated-type-specifier.
2139 bool isElaboratedTypeSpecifier() const;
2140
2141 bool canDecayToPointerType() const;
2142
2143 /// Whether this type is represented natively as a pointer. This includes
2144 /// pointers, references, block pointers, and Objective-C interface,
2145 /// qualified id, and qualified interface types, as well as nullptr_t.
2146 bool hasPointerRepresentation() const;
2147
2148 /// Whether this type can represent an objective pointer type for the
2149 /// purpose of GC'ability
2150 bool hasObjCPointerRepresentation() const;
2151
2152 /// Determine whether this type has an integer representation
2153 /// of some sort, e.g., it is an integer type or a vector.
2154 bool hasIntegerRepresentation() const;
2155
2156 /// Determine whether this type has an signed integer representation
2157 /// of some sort, e.g., it is an signed integer type or a vector.
2158 bool hasSignedIntegerRepresentation() const;
2159
2160 /// Determine whether this type has an unsigned integer representation
2161 /// of some sort, e.g., it is an unsigned integer type or a vector.
2162 bool hasUnsignedIntegerRepresentation() const;
2163
2164 /// Determine whether this type has a floating-point representation
2165 /// of some sort, e.g., it is a floating-point type or a vector thereof.
2166 bool hasFloatingRepresentation() const;
2167
2168 // Type Checking Functions: Check to see if this type is structurally the
2169 // specified type, ignoring typedefs and qualifiers, and return a pointer to
2170 // the best type we can.
2171 const RecordType *getAsStructureType() const;
2172 /// NOTE: getAs*ArrayType are methods on ASTContext.
2173 const RecordType *getAsUnionType() const;
2174 const ComplexType *getAsComplexIntegerType() const; // GCC complex int type.
2175 const ObjCObjectType *getAsObjCInterfaceType() const;
2176
2177 // The following is a convenience method that returns an ObjCObjectPointerType
2178 // for object declared using an interface.
2179 const ObjCObjectPointerType *getAsObjCInterfacePointerType() const;
2180 const ObjCObjectPointerType *getAsObjCQualifiedIdType() const;
2181 const ObjCObjectPointerType *getAsObjCQualifiedClassType() const;
2182 const ObjCObjectType *getAsObjCQualifiedInterfaceType() const;
2183
2184 /// Retrieves the CXXRecordDecl that this type refers to, either
2185 /// because the type is a RecordType or because it is the injected-class-name
2186 /// type of a class template or class template partial specialization.
2187 CXXRecordDecl *getAsCXXRecordDecl() const;
2188
2189 /// Retrieves the RecordDecl this type refers to.
2190 RecordDecl *getAsRecordDecl() const;
2191
2192 /// Retrieves the TagDecl that this type refers to, either
2193 /// because the type is a TagType or because it is the injected-class-name
2194 /// type of a class template or class template partial specialization.
2195 TagDecl *getAsTagDecl() const;
2196
2197 /// If this is a pointer or reference to a RecordType, return the
2198 /// CXXRecordDecl that the type refers to.
2199 ///
2200 /// If this is not a pointer or reference, or the type being pointed to does
2201 /// not refer to a CXXRecordDecl, returns NULL.
2202 const CXXRecordDecl *getPointeeCXXRecordDecl() const;
2203
2204 /// Get the DeducedType whose type will be deduced for a variable with
2205 /// an initializer of this type. This looks through declarators like pointer
2206 /// types, but not through decltype or typedefs.
2207 DeducedType *getContainedDeducedType() const;
2208
2209 /// Get the AutoType whose type will be deduced for a variable with
2210 /// an initializer of this type. This looks through declarators like pointer
2211 /// types, but not through decltype or typedefs.
2212 AutoType *getContainedAutoType() const {
2213 return dyn_cast_or_null<AutoType>(getContainedDeducedType());
2214 }
2215
2216 /// Determine whether this type was written with a leading 'auto'
2217 /// corresponding to a trailing return type (possibly for a nested
2218 /// function type within a pointer to function type or similar).
2219 bool hasAutoForTrailingReturnType() const;
2220
2221 /// Member-template getAs<specific type>'. Look through sugar for
2222 /// an instance of \<specific type>. This scheme will eventually
2223 /// replace the specific getAsXXXX methods above.
2224 ///
2225 /// There are some specializations of this member template listed
2226 /// immediately following this class.
2227 template <typename T> const T *getAs() const;
2228
2229 /// Member-template getAsAdjusted<specific type>. Look through specific kinds
2230 /// of sugar (parens, attributes, etc) for an instance of \<specific type>.
2231 /// This is used when you need to walk over sugar nodes that represent some
2232 /// kind of type adjustment from a type that was written as a \<specific type>
2233 /// to another type that is still canonically a \<specific type>.
2234 template <typename T> const T *getAsAdjusted() const;
2235
2236 /// A variant of getAs<> for array types which silently discards
2237 /// qualifiers from the outermost type.
2238 const ArrayType *getAsArrayTypeUnsafe() const;
2239
2240 /// Member-template castAs<specific type>. Look through sugar for
2241 /// the underlying instance of \<specific type>.
2242 ///
2243 /// This method has the same relationship to getAs<T> as cast<T> has
2244 /// to dyn_cast<T>; which is to say, the underlying type *must*
2245 /// have the intended type, and this method will never return null.
2246 template <typename T> const T *castAs() const;
2247
2248 /// A variant of castAs<> for array type which silently discards
2249 /// qualifiers from the outermost type.
2250 const ArrayType *castAsArrayTypeUnsafe() const;
2251
2252 /// Determine whether this type had the specified attribute applied to it
2253 /// (looking through top-level type sugar).
2254 bool hasAttr(attr::Kind AK) const;
2255
2256 /// Get the base element type of this type, potentially discarding type
2257 /// qualifiers. This should never be used when type qualifiers
2258 /// are meaningful.
2259 const Type *getBaseElementTypeUnsafe() const;
2260
2261 /// If this is an array type, return the element type of the array,
2262 /// potentially with type qualifiers missing.
2263 /// This should never be used when type qualifiers are meaningful.
2264 const Type *getArrayElementTypeNoTypeQual() const;
2265
2266 /// If this is a pointer type, return the pointee type.
2267 /// If this is an array type, return the array element type.
2268 /// This should never be used when type qualifiers are meaningful.
2269 const Type *getPointeeOrArrayElementType() const;
2270
2271 /// If this is a pointer, ObjC object pointer, or block
2272 /// pointer, this returns the respective pointee.
2273 QualType getPointeeType() const;
2274
2275 /// Return the specified type with any "sugar" removed from the type,
2276 /// removing any typedefs, typeofs, etc., as well as any qualifiers.
2277 const Type *getUnqualifiedDesugaredType() const;
2278
2279 /// More type predicates useful for type checking/promotion
2280 bool isPromotableIntegerType() const; // C99 6.3.1.1p2
2281
2282 /// Return true if this is an integer type that is
2283 /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..],
2284 /// or an enum decl which has a signed representation.
2285 bool isSignedIntegerType() const;
2286
2287 /// Return true if this is an integer type that is
2288 /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool],
2289 /// or an enum decl which has an unsigned representation.
2290 bool isUnsignedIntegerType() const;
2291
2292 /// Determines whether this is an integer type that is signed or an
2293 /// enumeration types whose underlying type is a signed integer type.
2294 bool isSignedIntegerOrEnumerationType() const;
2295
2296 /// Determines whether this is an integer type that is unsigned or an
2297 /// enumeration types whose underlying type is a unsigned integer type.
2298 bool isUnsignedIntegerOrEnumerationType() const;
2299
2300 /// Return true if this is a fixed point type according to
2301 /// ISO/IEC JTC1 SC22 WG14 N1169.
2302 bool isFixedPointType() const;
2303
2304 /// Return true if this is a fixed point or integer type.
2305 bool isFixedPointOrIntegerType() const;
2306
2307 /// Return true if this is a saturated fixed point type according to
2308 /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned.
2309 bool isSaturatedFixedPointType() const;
2310
2311 /// Return true if this is a saturated fixed point type according to
2312 /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned.
2313 bool isUnsaturatedFixedPointType() const;
2314
2315 /// Return true if this is a fixed point type that is signed according
2316 /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated.
2317 bool isSignedFixedPointType() const;
2318
2319 /// Return true if this is a fixed point type that is unsigned according
2320 /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated.
2321 bool isUnsignedFixedPointType() const;
2322
2323 /// Return true if this is not a variable sized type,
2324 /// according to the rules of C99 6.7.5p3. It is not legal to call this on
2325 /// incomplete types.
2326 bool isConstantSizeType() const;
2327
2328 /// Returns true if this type can be represented by some
2329 /// set of type specifiers.
2330 bool isSpecifierType() const;
2331
2332 /// Determine the linkage of this type.
2333 Linkage getLinkage() const;
2334
2335 /// Determine the visibility of this type.
2336 Visibility getVisibility() const {
2337 return getLinkageAndVisibility().getVisibility();
2338 }
2339
2340 /// Return true if the visibility was explicitly set is the code.
2341 bool isVisibilityExplicit() const {
2342 return getLinkageAndVisibility().isVisibilityExplicit();
2343 }
2344
2345 /// Determine the linkage and visibility of this type.
2346 LinkageInfo getLinkageAndVisibility() const;
2347
2348 /// True if the computed linkage is valid. Used for consistency
2349 /// checking. Should always return true.
2350 bool isLinkageValid() const;
2351
2352 /// Determine the nullability of the given type.
2353 ///
2354 /// Note that nullability is only captured as sugar within the type
2355 /// system, not as part of the canonical type, so nullability will
2356 /// be lost by canonicalization and desugaring.
2357 Optional<NullabilityKind> getNullability(const ASTContext &context) const;
2358
2359 /// Determine whether the given type can have a nullability
2360 /// specifier applied to it, i.e., if it is any kind of pointer type.
2361 ///
2362 /// \param ResultIfUnknown The value to return if we don't yet know whether
2363 /// this type can have nullability because it is dependent.
2364 bool canHaveNullability(bool ResultIfUnknown = true) const;
2365
2366 /// Retrieve the set of substitutions required when accessing a member
2367 /// of the Objective-C receiver type that is declared in the given context.
2368 ///
2369 /// \c *this is the type of the object we're operating on, e.g., the
2370 /// receiver for a message send or the base of a property access, and is
2371 /// expected to be of some object or object pointer type.
2372 ///
2373 /// \param dc The declaration context for which we are building up a
2374 /// substitution mapping, which should be an Objective-C class, extension,
2375 /// category, or method within.
2376 ///
2377 /// \returns an array of type arguments that can be substituted for
2378 /// the type parameters of the given declaration context in any type described
2379 /// within that context, or an empty optional to indicate that no
2380 /// substitution is required.
2381 Optional<ArrayRef<QualType>>
2382 getObjCSubstitutions(const DeclContext *dc) const;
2383
2384 /// Determines if this is an ObjC interface type that may accept type
2385 /// parameters.
2386 bool acceptsObjCTypeParams() const;
2387
2388 const char *getTypeClassName() const;
2389
2390 QualType getCanonicalTypeInternal() const {
2391 return CanonicalType;
2392 }
2393
2394 CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h
2395 void dump() const;
2396 void dump(llvm::raw_ostream &OS) const;
2397};
2398
2399/// This will check for a TypedefType by removing any existing sugar
2400/// until it reaches a TypedefType or a non-sugared type.
2401template <> const TypedefType *Type::getAs() const;
2402
2403/// This will check for a TemplateSpecializationType by removing any
2404/// existing sugar until it reaches a TemplateSpecializationType or a
2405/// non-sugared type.
2406template <> const TemplateSpecializationType *Type::getAs() const;
2407
2408/// This will check for an AttributedType by removing any existing sugar
2409/// until it reaches an AttributedType or a non-sugared type.
2410template <> const AttributedType *Type::getAs() const;
2411
2412// We can do canonical leaf types faster, because we don't have to
2413// worry about preserving child type decoration.
2414#define TYPE(Class, Base)
2415#define LEAF_TYPE(Class) \
2416template <> inline const Class##Type *Type::getAs() const { \
2417 return dyn_cast<Class##Type>(CanonicalType); \
2418} \
2419template <> inline const Class##Type *Type::castAs() const { \
2420 return cast<Class##Type>(CanonicalType); \
2421}
2422#include "clang/AST/TypeNodes.inc"
2423
2424/// This class is used for builtin types like 'int'. Builtin
2425/// types are always canonical and have a literal name field.
2426class BuiltinType : public Type {
2427public:
2428 enum Kind {
2429// OpenCL image types
2430#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id,
2431#include "clang/Basic/OpenCLImageTypes.def"
2432// OpenCL extension types
2433#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id,
2434#include "clang/Basic/OpenCLExtensionTypes.def"
2435// SVE Types
2436#define SVE_TYPE(Name, Id, SingletonId) Id,
2437#include "clang/Basic/AArch64SVEACLETypes.def"
2438// All other builtin types
2439#define BUILTIN_TYPE(Id, SingletonId) Id,
2440#define LAST_BUILTIN_TYPE(Id) LastKind = Id
2441#include "clang/AST/BuiltinTypes.def"
2442 };
2443
2444private:
2445 friend class ASTContext; // ASTContext creates these.
2446
2447 BuiltinType(Kind K)
2448 : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent),
2449 /*InstantiationDependent=*/(K == Dependent),
2450 /*VariablyModified=*/false,
2451 /*Unexpanded parameter pack=*/false) {
2452 BuiltinTypeBits.Kind = K;
2453 }
2454
2455public:
2456 Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); }
2457 StringRef getName(const PrintingPolicy &Policy) const;
2458
2459 const char *getNameAsCString(const PrintingPolicy &Policy) const {
2460 // The StringRef is null-terminated.
2461 StringRef str = getName(Policy);
2462 assert(!str.empty() && str.data()[str.size()] == '\0')((!str.empty() && str.data()[str.size()] == '\0') ? static_cast
<void> (0) : __assert_fail ("!str.empty() && str.data()[str.size()] == '\\0'"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 2462, __PRETTY_FUNCTION__))
;
2463 return str.data();
2464 }
2465
2466 bool isSugared() const { return false; }
2467 QualType desugar() const { return QualType(this, 0); }
2468
2469 bool isInteger() const {
2470 return getKind() >= Bool && getKind() <= Int128;
2471 }
2472
2473 bool isSignedInteger() const {
2474 return getKind() >= Char_S && getKind() <= Int128;
2475 }
2476
2477 bool isUnsignedInteger() const {
2478 return getKind() >= Bool && getKind() <= UInt128;
2479 }
2480
2481 bool isFloatingPoint() const {
2482 return getKind() >= Half && getKind() <= Float128;
2483 }
2484
2485 /// Determines whether the given kind corresponds to a placeholder type.
2486 static bool isPlaceholderTypeKind(Kind K) {
2487 return K >= Overload;
2488 }
2489
2490 /// Determines whether this type is a placeholder type, i.e. a type
2491 /// which cannot appear in arbitrary positions in a fully-formed
2492 /// expression.
2493 bool isPlaceholderType() const {
2494 return isPlaceholderTypeKind(getKind());
2495 }
2496
2497 /// Determines whether this type is a placeholder type other than
2498 /// Overload. Most placeholder types require only syntactic
2499 /// information about their context in order to be resolved (e.g.
2500 /// whether it is a call expression), which means they can (and
2501 /// should) be resolved in an earlier "phase" of analysis.
2502 /// Overload expressions sometimes pick up further information
2503 /// from their context, like whether the context expects a
2504 /// specific function-pointer type, and so frequently need
2505 /// special treatment.
2506 bool isNonOverloadPlaceholderType() const {
2507 return getKind() > Overload;
2508 }
2509
2510 static bool classof(const Type *T) { return T->getTypeClass() == Builtin; }
2511};
2512
2513/// Complex values, per C99 6.2.5p11. This supports the C99 complex
2514/// types (_Complex float etc) as well as the GCC integer complex extensions.
2515class ComplexType : public Type, public llvm::FoldingSetNode {
2516 friend class ASTContext; // ASTContext creates these.
2517
2518 QualType ElementType;
2519
2520 ComplexType(QualType Element, QualType CanonicalPtr)
2521 : Type(Complex, CanonicalPtr, Element->isDependentType(),
2522 Element->isInstantiationDependentType(),
2523 Element->isVariablyModifiedType(),
2524 Element->containsUnexpandedParameterPack()),
2525 ElementType(Element) {}
2526
2527public:
2528 QualType getElementType() const { return ElementType; }
2529
2530 bool isSugared() const { return false; }
2531 QualType desugar() const { return QualType(this, 0); }
2532
2533 void Profile(llvm::FoldingSetNodeID &ID) {
2534 Profile(ID, getElementType());
2535 }
2536
2537 static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) {
2538 ID.AddPointer(Element.getAsOpaquePtr());
2539 }
2540
2541 static bool classof(const Type *T) { return T->getTypeClass() == Complex; }
2542};
2543
2544/// Sugar for parentheses used when specifying types.
2545class ParenType : public Type, public llvm::FoldingSetNode {
2546 friend class ASTContext; // ASTContext creates these.
2547
2548 QualType Inner;
2549
2550 ParenType(QualType InnerType, QualType CanonType)
2551 : Type(Paren, CanonType, InnerType->isDependentType(),
2552 InnerType->isInstantiationDependentType(),
2553 InnerType->isVariablyModifiedType(),
2554 InnerType->containsUnexpandedParameterPack()),
2555 Inner(InnerType) {}
2556
2557public:
2558 QualType getInnerType() const { return Inner; }
2559
2560 bool isSugared() const { return true; }
2561 QualType desugar() const { return getInnerType(); }
2562
2563 void Profile(llvm::FoldingSetNodeID &ID) {
2564 Profile(ID, getInnerType());
2565 }
2566
2567 static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) {
2568 Inner.Profile(ID);
2569 }
2570
2571 static bool classof(const Type *T) { return T->getTypeClass() == Paren; }
2572};
2573
2574/// PointerType - C99 6.7.5.1 - Pointer Declarators.
2575class PointerType : public Type, public llvm::FoldingSetNode {
2576 friend class ASTContext; // ASTContext creates these.
2577
2578 QualType PointeeType;
2579
2580 PointerType(QualType Pointee, QualType CanonicalPtr)
2581 : Type(Pointer, CanonicalPtr, Pointee->isDependentType(),
2582 Pointee->isInstantiationDependentType(),
2583 Pointee->isVariablyModifiedType(),
2584 Pointee->containsUnexpandedParameterPack()),
2585 PointeeType(Pointee) {}
2586
2587public:
2588 QualType getPointeeType() const { return PointeeType; }
2589
2590 /// Returns true if address spaces of pointers overlap.
2591 /// OpenCL v2.0 defines conversion rules for pointers to different
2592 /// address spaces (OpenCLC v2.0 s6.5.5) and notion of overlapping
2593 /// address spaces.
2594 /// CL1.1 or CL1.2:
2595 /// address spaces overlap iff they are they same.
2596 /// CL2.0 adds:
2597 /// __generic overlaps with any address space except for __constant.
2598 bool isAddressSpaceOverlapping(const PointerType &other) const {
2599 Qualifiers thisQuals = PointeeType.getQualifiers();
2600 Qualifiers otherQuals = other.getPointeeType().getQualifiers();
2601 // Address spaces overlap if at least one of them is a superset of another
2602 return thisQuals.isAddressSpaceSupersetOf(otherQuals) ||
2603 otherQuals.isAddressSpaceSupersetOf(thisQuals);
2604 }
2605
2606 bool isSugared() const { return false; }
2607 QualType desugar() const { return QualType(this, 0); }
2608
2609 void Profile(llvm::FoldingSetNodeID &ID) {
2610 Profile(ID, getPointeeType());
2611 }
2612
2613 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) {
2614 ID.AddPointer(Pointee.getAsOpaquePtr());
2615 }
2616
2617 static bool classof(const Type *T) { return T->getTypeClass() == Pointer; }
2618};
2619
2620/// Represents a type which was implicitly adjusted by the semantic
2621/// engine for arbitrary reasons. For example, array and function types can
2622/// decay, and function types can have their calling conventions adjusted.
2623class AdjustedType : public Type, public llvm::FoldingSetNode {
2624 QualType OriginalTy;
2625 QualType AdjustedTy;
2626
2627protected:
2628 friend class ASTContext; // ASTContext creates these.
2629
2630 AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy,
2631 QualType CanonicalPtr)
2632 : Type(TC, CanonicalPtr, OriginalTy->isDependentType(),
2633 OriginalTy->isInstantiationDependentType(),
2634 OriginalTy->isVariablyModifiedType(),
2635 OriginalTy->containsUnexpandedParameterPack()),
2636 OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {}
2637
2638public:
2639 QualType getOriginalType() const { return OriginalTy; }
2640 QualType getAdjustedType() const { return AdjustedTy; }
2641
2642 bool isSugared() const { return true; }
2643 QualType desugar() const { return AdjustedTy; }
2644
2645 void Profile(llvm::FoldingSetNodeID &ID) {
2646 Profile(ID, OriginalTy, AdjustedTy);
2647 }
2648
2649 static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) {
2650 ID.AddPointer(Orig.getAsOpaquePtr());
2651 ID.AddPointer(New.getAsOpaquePtr());
2652 }
2653
2654 static bool classof(const Type *T) {
2655 return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed;
2656 }
2657};
2658
2659/// Represents a pointer type decayed from an array or function type.
2660class DecayedType : public AdjustedType {
2661 friend class ASTContext; // ASTContext creates these.
2662
2663 inline
2664 DecayedType(QualType OriginalType, QualType Decayed, QualType Canonical);
2665
2666public:
2667 QualType getDecayedType() const { return getAdjustedType(); }
2668
2669 inline QualType getPointeeType() const;
2670
2671 static bool classof(const Type *T) { return T->getTypeClass() == Decayed; }
2672};
2673
2674/// Pointer to a block type.
2675/// This type is to represent types syntactically represented as
2676/// "void (^)(int)", etc. Pointee is required to always be a function type.
2677class BlockPointerType : public Type, public llvm::FoldingSetNode {
2678 friend class ASTContext; // ASTContext creates these.
2679
2680 // Block is some kind of pointer type
2681 QualType PointeeType;
2682
2683 BlockPointerType(QualType Pointee, QualType CanonicalCls)
2684 : Type(BlockPointer, CanonicalCls, Pointee->isDependentType(),
2685 Pointee->isInstantiationDependentType(),
2686 Pointee->isVariablyModifiedType(),
2687 Pointee->containsUnexpandedParameterPack()),
2688 PointeeType(Pointee) {}
2689
2690public:
2691 // Get the pointee type. Pointee is required to always be a function type.
2692 QualType getPointeeType() const { return PointeeType; }
2693
2694 bool isSugared() const { return false; }
2695 QualType desugar() const { return QualType(this, 0); }
2696
2697 void Profile(llvm::FoldingSetNodeID &ID) {
2698 Profile(ID, getPointeeType());
2699 }
2700
2701 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) {
2702 ID.AddPointer(Pointee.getAsOpaquePtr());
2703 }
2704
2705 static bool classof(const Type *T) {
2706 return T->getTypeClass() == BlockPointer;
2707 }
2708};
2709
2710/// Base for LValueReferenceType and RValueReferenceType
2711class ReferenceType : public Type, public llvm::FoldingSetNode {
2712 QualType PointeeType;
2713
2714protected:
2715 ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef,
2716 bool SpelledAsLValue)
2717 : Type(tc, CanonicalRef, Referencee->isDependentType(),
2718 Referencee->isInstantiationDependentType(),
2719 Referencee->isVariablyModifiedType(),
2720 Referencee->containsUnexpandedParameterPack()),
2721 PointeeType(Referencee) {
2722 ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue;
2723 ReferenceTypeBits.InnerRef = Referencee->isReferenceType();
2724 }
2725
2726public:
2727 bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; }
2728 bool isInnerRef() const { return ReferenceTypeBits.InnerRef; }
2729
2730 QualType getPointeeTypeAsWritten() const { return PointeeType; }
2731
2732 QualType getPointeeType() const {
2733 // FIXME: this might strip inner qualifiers; okay?
2734 const ReferenceType *T = this;
2735 while (T->isInnerRef())
2736 T = T->PointeeType->castAs<ReferenceType>();
2737 return T->PointeeType;
2738 }
2739
2740 void Profile(llvm::FoldingSetNodeID &ID) {
2741 Profile(ID, PointeeType, isSpelledAsLValue());
2742 }
2743
2744 static void Profile(llvm::FoldingSetNodeID &ID,
2745 QualType Referencee,
2746 bool SpelledAsLValue) {
2747 ID.AddPointer(Referencee.getAsOpaquePtr());
2748 ID.AddBoolean(SpelledAsLValue);
2749 }
2750
2751 static bool classof(const Type *T) {
2752 return T->getTypeClass() == LValueReference ||
2753 T->getTypeClass() == RValueReference;
2754 }
2755};
2756
2757/// An lvalue reference type, per C++11 [dcl.ref].
2758class LValueReferenceType : public ReferenceType {
2759 friend class ASTContext; // ASTContext creates these
2760
2761 LValueReferenceType(QualType Referencee, QualType CanonicalRef,
2762 bool SpelledAsLValue)
2763 : ReferenceType(LValueReference, Referencee, CanonicalRef,
2764 SpelledAsLValue) {}
2765
2766public:
2767 bool isSugared() const { return false; }
2768 QualType desugar() const { return QualType(this, 0); }
2769
2770 static bool classof(const Type *T) {
2771 return T->getTypeClass() == LValueReference;
2772 }
2773};
2774
2775/// An rvalue reference type, per C++11 [dcl.ref].
2776class RValueReferenceType : public ReferenceType {
2777 friend class ASTContext; // ASTContext creates these
2778
2779 RValueReferenceType(QualType Referencee, QualType CanonicalRef)
2780 : ReferenceType(RValueReference, Referencee, CanonicalRef, false) {}
2781
2782public:
2783 bool isSugared() const { return false; }
2784 QualType desugar() const { return QualType(this, 0); }
2785
2786 static bool classof(const Type *T) {
2787 return T->getTypeClass() == RValueReference;
2788 }
2789};
2790
2791/// A pointer to member type per C++ 8.3.3 - Pointers to members.
2792///
2793/// This includes both pointers to data members and pointer to member functions.
2794class MemberPointerType : public Type, public llvm::FoldingSetNode {
2795 friend class ASTContext; // ASTContext creates these.
2796
2797 QualType PointeeType;
2798
2799 /// The class of which the pointee is a member. Must ultimately be a
2800 /// RecordType, but could be a typedef or a template parameter too.
2801 const Type *Class;
2802
2803 MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr)
2804 : Type(MemberPointer, CanonicalPtr,
2805 Cls->isDependentType() || Pointee->isDependentType(),
2806 (Cls->isInstantiationDependentType() ||
2807 Pointee->isInstantiationDependentType()),
2808 Pointee->isVariablyModifiedType(),
2809 (Cls->containsUnexpandedParameterPack() ||
2810 Pointee->containsUnexpandedParameterPack())),
2811 PointeeType(Pointee), Class(Cls) {}
2812
2813public:
2814 QualType getPointeeType() const { return PointeeType; }
2815
2816 /// Returns true if the member type (i.e. the pointee type) is a
2817 /// function type rather than a data-member type.
2818 bool isMemberFunctionPointer() const {
2819 return PointeeType->isFunctionProtoType();
2820 }
2821
2822 /// Returns true if the member type (i.e. the pointee type) is a
2823 /// data type rather than a function type.
2824 bool isMemberDataPointer() const {
2825 return !PointeeType->isFunctionProtoType();
2826 }
2827
2828 const Type *getClass() const { return Class; }
2829 CXXRecordDecl *getMostRecentCXXRecordDecl() const;
2830
2831 bool isSugared() const { return false; }
2832 QualType desugar() const { return QualType(this, 0); }
2833
2834 void Profile(llvm::FoldingSetNodeID &ID) {
2835 Profile(ID, getPointeeType(), getClass());
2836 }
2837
2838 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee,
2839 const Type *Class) {
2840 ID.AddPointer(Pointee.getAsOpaquePtr());
2841 ID.AddPointer(Class);
2842 }
2843
2844 static bool classof(const Type *T) {
2845 return T->getTypeClass() == MemberPointer;
2846 }
2847};
2848
2849/// Represents an array type, per C99 6.7.5.2 - Array Declarators.
2850class ArrayType : public Type, public llvm::FoldingSetNode {
2851public:
2852 /// Capture whether this is a normal array (e.g. int X[4])
2853 /// an array with a static size (e.g. int X[static 4]), or an array
2854 /// with a star size (e.g. int X[*]).
2855 /// 'static' is only allowed on function parameters.
2856 enum ArraySizeModifier {
2857 Normal, Static, Star
2858 };
2859
2860private:
2861 /// The element type of the array.
2862 QualType ElementType;
2863
2864protected:
2865 friend class ASTContext; // ASTContext creates these.
2866
2867 // C++ [temp.dep.type]p1:
2868 // A type is dependent if it is...
2869 // - an array type constructed from any dependent type or whose
2870 // size is specified by a constant expression that is
2871 // value-dependent,
2872 ArrayType(TypeClass tc, QualType et, QualType can,
2873 ArraySizeModifier sm, unsigned tq,
2874 bool ContainsUnexpandedParameterPack)
2875 : Type(tc, can, et->isDependentType() || tc == DependentSizedArray,
2876 et->isInstantiationDependentType() || tc == DependentSizedArray,
2877 (tc == VariableArray || et->isVariablyModifiedType()),
2878 ContainsUnexpandedParameterPack),
2879 ElementType(et) {
2880 ArrayTypeBits.IndexTypeQuals = tq;
2881 ArrayTypeBits.SizeModifier = sm;
2882 }
2883
2884public:
2885 QualType getElementType() const { return ElementType; }
2886
2887 ArraySizeModifier getSizeModifier() const {
2888 return ArraySizeModifier(ArrayTypeBits.SizeModifier);
2889 }
2890
2891 Qualifiers getIndexTypeQualifiers() const {
2892 return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers());
2893 }
2894
2895 unsigned getIndexTypeCVRQualifiers() const {
2896 return ArrayTypeBits.IndexTypeQuals;
2897 }
2898
2899 static bool classof(const Type *T) {
2900 return T->getTypeClass() == ConstantArray ||
2901 T->getTypeClass() == VariableArray ||
2902 T->getTypeClass() == IncompleteArray ||
2903 T->getTypeClass() == DependentSizedArray;
2904 }
2905};
2906
2907/// Represents the canonical version of C arrays with a specified constant size.
2908/// For example, the canonical type for 'int A[4 + 4*100]' is a
2909/// ConstantArrayType where the element type is 'int' and the size is 404.
2910class ConstantArrayType : public ArrayType {
2911 llvm::APInt Size; // Allows us to unique the type.
2912
2913 ConstantArrayType(QualType et, QualType can, const llvm::APInt &size,
2914 ArraySizeModifier sm, unsigned tq)
2915 : ArrayType(ConstantArray, et, can, sm, tq,
2916 et->containsUnexpandedParameterPack()),
2917 Size(size) {}
2918
2919protected:
2920 friend class ASTContext; // ASTContext creates these.
2921
2922 ConstantArrayType(TypeClass tc, QualType et, QualType can,
2923 const llvm::APInt &size, ArraySizeModifier sm, unsigned tq)
2924 : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()),
2925 Size(size) {}
2926
2927public:
2928 const llvm::APInt &getSize() const { return Size; }
2929 bool isSugared() const { return false; }
2930 QualType desugar() const { return QualType(this, 0); }
2931
2932 /// Determine the number of bits required to address a member of
2933 // an array with the given element type and number of elements.
2934 static unsigned getNumAddressingBits(const ASTContext &Context,
2935 QualType ElementType,
2936 const llvm::APInt &NumElements);
2937
2938 /// Determine the maximum number of active bits that an array's size
2939 /// can require, which limits the maximum size of the array.
2940 static unsigned getMaxSizeBits(const ASTContext &Context);
2941
2942 void Profile(llvm::FoldingSetNodeID &ID) {
2943 Profile(ID, getElementType(), getSize(),
2944 getSizeModifier(), getIndexTypeCVRQualifiers());
2945 }
2946
2947 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET,
2948 const llvm::APInt &ArraySize, ArraySizeModifier SizeMod,
2949 unsigned TypeQuals) {
2950 ID.AddPointer(ET.getAsOpaquePtr());
2951 ID.AddInteger(ArraySize.getZExtValue());
2952 ID.AddInteger(SizeMod);
2953 ID.AddInteger(TypeQuals);
2954 }
2955
2956 static bool classof(const Type *T) {
2957 return T->getTypeClass() == ConstantArray;
2958 }
2959};
2960
2961/// Represents a C array with an unspecified size. For example 'int A[]' has
2962/// an IncompleteArrayType where the element type is 'int' and the size is
2963/// unspecified.
2964class IncompleteArrayType : public ArrayType {
2965 friend class ASTContext; // ASTContext creates these.
2966
2967 IncompleteArrayType(QualType et, QualType can,
2968 ArraySizeModifier sm, unsigned tq)
2969 : ArrayType(IncompleteArray, et, can, sm, tq,
2970 et->containsUnexpandedParameterPack()) {}
2971
2972public:
2973 friend class StmtIteratorBase;
2974
2975 bool isSugared() const { return false; }
2976 QualType desugar() const { return QualType(this, 0); }
2977
2978 static bool classof(const Type *T) {
2979 return T->getTypeClass() == IncompleteArray;
2980 }
2981
2982 void Profile(llvm::FoldingSetNodeID &ID) {
2983 Profile(ID, getElementType(), getSizeModifier(),
2984 getIndexTypeCVRQualifiers());
2985 }
2986
2987 static void Profile(llvm::FoldingSetNodeID &ID, QualType ET,
2988 ArraySizeModifier SizeMod, unsigned TypeQuals) {
2989 ID.AddPointer(ET.getAsOpaquePtr());
2990 ID.AddInteger(SizeMod);
2991 ID.AddInteger(TypeQuals);
2992 }
2993};
2994
2995/// Represents a C array with a specified size that is not an
2996/// integer-constant-expression. For example, 'int s[x+foo()]'.
2997/// Since the size expression is an arbitrary expression, we store it as such.
2998///
2999/// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and
3000/// should not be: two lexically equivalent variable array types could mean
3001/// different things, for example, these variables do not have the same type
3002/// dynamically:
3003///
3004/// void foo(int x) {
3005/// int Y[x];
3006/// ++x;
3007/// int Z[x];
3008/// }
3009class VariableArrayType : public ArrayType {
3010 friend class ASTContext; // ASTContext creates these.
3011
3012 /// An assignment-expression. VLA's are only permitted within
3013 /// a function block.
3014 Stmt *SizeExpr;
3015
3016 /// The range spanned by the left and right array brackets.
3017 SourceRange Brackets;
3018
3019 VariableArrayType(QualType et, QualType can, Expr *e,
3020 ArraySizeModifier sm, unsigned tq,
3021 SourceRange brackets)
3022 : ArrayType(VariableArray, et, can, sm, tq,
3023 et->containsUnexpandedParameterPack()),
3024 SizeExpr((Stmt*) e), Brackets(brackets) {}
3025
3026public:
3027 friend class StmtIteratorBase;
3028
3029 Expr *getSizeExpr() const {
3030 // We use C-style casts instead of cast<> here because we do not wish
3031 // to have a dependency of Type.h on Stmt.h/Expr.h.
3032 return (Expr*) SizeExpr;
3033 }
3034
3035 SourceRange getBracketsRange() const { return Brackets; }
3036 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); }
3037 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); }
3038
3039 bool isSugared() const { return false; }
3040 QualType desugar() const { return QualType(this, 0); }
3041
3042 static bool classof(const Type *T) {
3043 return T->getTypeClass() == VariableArray;
3044 }
3045
3046 void Profile(llvm::FoldingSetNodeID &ID) {
3047 llvm_unreachable("Cannot unique VariableArrayTypes.")::llvm::llvm_unreachable_internal("Cannot unique VariableArrayTypes."
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 3047)
;
3048 }
3049};
3050
3051/// Represents an array type in C++ whose size is a value-dependent expression.
3052///
3053/// For example:
3054/// \code
3055/// template<typename T, int Size>
3056/// class array {
3057/// T data[Size];
3058/// };
3059/// \endcode
3060///
3061/// For these types, we won't actually know what the array bound is
3062/// until template instantiation occurs, at which point this will
3063/// become either a ConstantArrayType or a VariableArrayType.
3064class DependentSizedArrayType : public ArrayType {
3065 friend class ASTContext; // ASTContext creates these.
3066
3067 const ASTContext &Context;
3068
3069 /// An assignment expression that will instantiate to the
3070 /// size of the array.
3071 ///
3072 /// The expression itself might be null, in which case the array
3073 /// type will have its size deduced from an initializer.
3074 Stmt *SizeExpr;
3075
3076 /// The range spanned by the left and right array brackets.
3077 SourceRange Brackets;
3078
3079 DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can,
3080 Expr *e, ArraySizeModifier sm, unsigned tq,
3081 SourceRange brackets);
3082
3083public:
3084 friend class StmtIteratorBase;
3085
3086 Expr *getSizeExpr() const {
3087 // We use C-style casts instead of cast<> here because we do not wish
3088 // to have a dependency of Type.h on Stmt.h/Expr.h.
3089 return (Expr*) SizeExpr;
3090 }
3091
3092 SourceRange getBracketsRange() const { return Brackets; }
3093 SourceLocation getLBracketLoc() const { return Brackets.getBegin(); }
3094 SourceLocation getRBracketLoc() const { return Brackets.getEnd(); }
3095
3096 bool isSugared() const { return false; }
3097 QualType desugar() const { return QualType(this, 0); }
3098
3099 static bool classof(const Type *T) {
3100 return T->getTypeClass() == DependentSizedArray;
3101 }
3102
3103 void Profile(llvm::FoldingSetNodeID &ID) {
3104 Profile(ID, Context, getElementType(),
3105 getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr());
3106 }
3107
3108 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
3109 QualType ET, ArraySizeModifier SizeMod,
3110 unsigned TypeQuals, Expr *E);
3111};
3112
3113/// Represents an extended address space qualifier where the input address space
3114/// value is dependent. Non-dependent address spaces are not represented with a
3115/// special Type subclass; they are stored on an ExtQuals node as part of a QualType.
3116///
3117/// For example:
3118/// \code
3119/// template<typename T, int AddrSpace>
3120/// class AddressSpace {
3121/// typedef T __attribute__((address_space(AddrSpace))) type;
3122/// }
3123/// \endcode
3124class DependentAddressSpaceType : public Type, public llvm::FoldingSetNode {
3125 friend class ASTContext;
3126
3127 const ASTContext &Context;
3128 Expr *AddrSpaceExpr;
3129 QualType PointeeType;
3130 SourceLocation loc;
3131
3132 DependentAddressSpaceType(const ASTContext &Context, QualType PointeeType,
3133 QualType can, Expr *AddrSpaceExpr,
3134 SourceLocation loc);
3135
3136public:
3137 Expr *getAddrSpaceExpr() const { return AddrSpaceExpr; }
3138 QualType getPointeeType() const { return PointeeType; }
3139 SourceLocation getAttributeLoc() const { return loc; }
3140
3141 bool isSugared() const { return false; }
3142 QualType desugar() const { return QualType(this, 0); }
3143
3144 static bool classof(const Type *T) {
3145 return T->getTypeClass() == DependentAddressSpace;
3146 }
3147
3148 void Profile(llvm::FoldingSetNodeID &ID) {
3149 Profile(ID, Context, getPointeeType(), getAddrSpaceExpr());
3150 }
3151
3152 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
3153 QualType PointeeType, Expr *AddrSpaceExpr);
3154};
3155
3156/// Represents an extended vector type where either the type or size is
3157/// dependent.
3158///
3159/// For example:
3160/// \code
3161/// template<typename T, int Size>
3162/// class vector {
3163/// typedef T __attribute__((ext_vector_type(Size))) type;
3164/// }
3165/// \endcode
3166class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode {
3167 friend class ASTContext;
3168
3169 const ASTContext &Context;
3170 Expr *SizeExpr;
3171
3172 /// The element type of the array.
3173 QualType ElementType;
3174
3175 SourceLocation loc;
3176
3177 DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType,
3178 QualType can, Expr *SizeExpr, SourceLocation loc);
3179
3180public:
3181 Expr *getSizeExpr() const { return SizeExpr; }
3182 QualType getElementType() const { return ElementType; }
3183 SourceLocation getAttributeLoc() const { return loc; }
3184
3185 bool isSugared() const { return false; }
3186 QualType desugar() const { return QualType(this, 0); }
3187
3188 static bool classof(const Type *T) {
3189 return T->getTypeClass() == DependentSizedExtVector;
3190 }
3191
3192 void Profile(llvm::FoldingSetNodeID &ID) {
3193 Profile(ID, Context, getElementType(), getSizeExpr());
3194 }
3195
3196 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
3197 QualType ElementType, Expr *SizeExpr);
3198};
3199
3200
3201/// Represents a GCC generic vector type. This type is created using
3202/// __attribute__((vector_size(n)), where "n" specifies the vector size in
3203/// bytes; or from an Altivec __vector or vector declaration.
3204/// Since the constructor takes the number of vector elements, the
3205/// client is responsible for converting the size into the number of elements.
3206class VectorType : public Type, public llvm::FoldingSetNode {
3207public:
3208 enum VectorKind {
3209 /// not a target-specific vector type
3210 GenericVector,
3211
3212 /// is AltiVec vector
3213 AltiVecVector,
3214
3215 /// is AltiVec 'vector Pixel'
3216 AltiVecPixel,
3217
3218 /// is AltiVec 'vector bool ...'
3219 AltiVecBool,
3220
3221 /// is ARM Neon vector
3222 NeonVector,
3223
3224 /// is ARM Neon polynomial vector
3225 NeonPolyVector
3226 };
3227
3228protected:
3229 friend class ASTContext; // ASTContext creates these.
3230
3231 /// The element type of the vector.
3232 QualType ElementType;
3233
3234 VectorType(QualType vecType, unsigned nElements, QualType canonType,
3235 VectorKind vecKind);
3236
3237 VectorType(TypeClass tc, QualType vecType, unsigned nElements,
3238 QualType canonType, VectorKind vecKind);
3239
3240public:
3241 QualType getElementType() const { return ElementType; }
3242 unsigned getNumElements() const { return VectorTypeBits.NumElements; }
3243
3244 static bool isVectorSizeTooLarge(unsigned NumElements) {
3245 return NumElements > VectorTypeBitfields::MaxNumElements;
3246 }
3247
3248 bool isSugared() const { return false; }
3249 QualType desugar() const { return QualType(this, 0); }
3250
3251 VectorKind getVectorKind() const {
3252 return VectorKind(VectorTypeBits.VecKind);
3253 }
3254
3255 void Profile(llvm::FoldingSetNodeID &ID) {
3256 Profile(ID, getElementType(), getNumElements(),
3257 getTypeClass(), getVectorKind());
3258 }
3259
3260 static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType,
3261 unsigned NumElements, TypeClass TypeClass,
3262 VectorKind VecKind) {
3263 ID.AddPointer(ElementType.getAsOpaquePtr());
3264 ID.AddInteger(NumElements);
3265 ID.AddInteger(TypeClass);
3266 ID.AddInteger(VecKind);
3267 }
3268
3269 static bool classof(const Type *T) {
3270 return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector;
3271 }
3272};
3273
3274/// Represents a vector type where either the type or size is dependent.
3275////
3276/// For example:
3277/// \code
3278/// template<typename T, int Size>
3279/// class vector {
3280/// typedef T __attribute__((vector_size(Size))) type;
3281/// }
3282/// \endcode
3283class DependentVectorType : public Type, public llvm::FoldingSetNode {
3284 friend class ASTContext;
3285
3286 const ASTContext &Context;
3287 QualType ElementType;
3288 Expr *SizeExpr;
3289 SourceLocation Loc;
3290
3291 DependentVectorType(const ASTContext &Context, QualType ElementType,
3292 QualType CanonType, Expr *SizeExpr,
3293 SourceLocation Loc, VectorType::VectorKind vecKind);
3294
3295public:
3296 Expr *getSizeExpr() const { return SizeExpr; }
3297 QualType getElementType() const { return ElementType; }
3298 SourceLocation getAttributeLoc() const { return Loc; }
3299 VectorType::VectorKind getVectorKind() const {
3300 return VectorType::VectorKind(VectorTypeBits.VecKind);
3301 }
3302
3303 bool isSugared() const { return false; }
3304 QualType desugar() const { return QualType(this, 0); }
3305
3306 static bool classof(const Type *T) {
3307 return T->getTypeClass() == DependentVector;
3308 }
3309
3310 void Profile(llvm::FoldingSetNodeID &ID) {
3311 Profile(ID, Context, getElementType(), getSizeExpr(), getVectorKind());
3312 }
3313
3314 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
3315 QualType ElementType, const Expr *SizeExpr,
3316 VectorType::VectorKind VecKind);
3317};
3318
3319/// ExtVectorType - Extended vector type. This type is created using
3320/// __attribute__((ext_vector_type(n)), where "n" is the number of elements.
3321/// Unlike vector_size, ext_vector_type is only allowed on typedef's. This
3322/// class enables syntactic extensions, like Vector Components for accessing
3323/// points (as .xyzw), colors (as .rgba), and textures (modeled after OpenGL
3324/// Shading Language).
3325class ExtVectorType : public VectorType {
3326 friend class ASTContext; // ASTContext creates these.
3327
3328 ExtVectorType(QualType vecType, unsigned nElements, QualType canonType)
3329 : VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {}
3330
3331public:
3332 static int getPointAccessorIdx(char c) {
3333 switch (c) {
3334 default: return -1;
3335 case 'x': case 'r': return 0;
3336 case 'y': case 'g': return 1;
3337 case 'z': case 'b': return 2;
3338 case 'w': case 'a': return 3;
3339 }
3340 }
3341
3342 static int getNumericAccessorIdx(char c) {
3343 switch (c) {
3344 default: return -1;
3345 case '0': return 0;
3346 case '1': return 1;
3347 case '2': return 2;
3348 case '3': return 3;
3349 case '4': return 4;
3350 case '5': return 5;
3351 case '6': return 6;
3352 case '7': return 7;
3353 case '8': return 8;
3354 case '9': return 9;
3355 case 'A':
3356 case 'a': return 10;
3357 case 'B':
3358 case 'b': return 11;
3359 case 'C':
3360 case 'c': return 12;
3361 case 'D':
3362 case 'd': return 13;
3363 case 'E':
3364 case 'e': return 14;
3365 case 'F':
3366 case 'f': return 15;
3367 }
3368 }
3369
3370 static int getAccessorIdx(char c, bool isNumericAccessor) {
3371 if (isNumericAccessor)
3372 return getNumericAccessorIdx(c);
3373 else
3374 return getPointAccessorIdx(c);
3375 }
3376
3377 bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const {
3378 if (int idx = getAccessorIdx(c, isNumericAccessor)+1)
3379 return unsigned(idx-1) < getNumElements();
3380 return false;
3381 }
3382
3383 bool isSugared() const { return false; }
3384 QualType desugar() const { return QualType(this, 0); }
3385
3386 static bool classof(const Type *T) {
3387 return T->getTypeClass() == ExtVector;
3388 }
3389};
3390
3391/// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base
3392/// class of FunctionNoProtoType and FunctionProtoType.
3393class FunctionType : public Type {
3394 // The type returned by the function.
3395 QualType ResultType;
3396
3397public:
3398 /// Interesting information about a specific parameter that can't simply
3399 /// be reflected in parameter's type. This is only used by FunctionProtoType
3400 /// but is in FunctionType to make this class available during the
3401 /// specification of the bases of FunctionProtoType.
3402 ///
3403 /// It makes sense to model language features this way when there's some
3404 /// sort of parameter-specific override (such as an attribute) that
3405 /// affects how the function is called. For example, the ARC ns_consumed
3406 /// attribute changes whether a parameter is passed at +0 (the default)
3407 /// or +1 (ns_consumed). This must be reflected in the function type,
3408 /// but isn't really a change to the parameter type.
3409 ///
3410 /// One serious disadvantage of modelling language features this way is
3411 /// that they generally do not work with language features that attempt
3412 /// to destructure types. For example, template argument deduction will
3413 /// not be able to match a parameter declared as
3414 /// T (*)(U)
3415 /// against an argument of type
3416 /// void (*)(__attribute__((ns_consumed)) id)
3417 /// because the substitution of T=void, U=id into the former will
3418 /// not produce the latter.
3419 class ExtParameterInfo {
3420 enum {
3421 ABIMask = 0x0F,
3422 IsConsumed = 0x10,
3423 HasPassObjSize = 0x20,
3424 IsNoEscape = 0x40,
3425 };
3426 unsigned char Data = 0;
3427
3428 public:
3429 ExtParameterInfo() = default;
3430
3431 /// Return the ABI treatment of this parameter.
3432 ParameterABI getABI() const { return ParameterABI(Data & ABIMask); }
3433 ExtParameterInfo withABI(ParameterABI kind) const {
3434 ExtParameterInfo copy = *this;
3435 copy.Data = (copy.Data & ~ABIMask) | unsigned(kind);
3436 return copy;
3437 }
3438
3439 /// Is this parameter considered "consumed" by Objective-C ARC?
3440 /// Consumed parameters must have retainable object type.
3441 bool isConsumed() const { return (Data & IsConsumed); }
3442 ExtParameterInfo withIsConsumed(bool consumed) const {
3443 ExtParameterInfo copy = *this;
3444 if (consumed)
3445 copy.Data |= IsConsumed;
3446 else
3447 copy.Data &= ~IsConsumed;
3448 return copy;
3449 }
3450
3451 bool hasPassObjectSize() const { return Data & HasPassObjSize; }
3452 ExtParameterInfo withHasPassObjectSize() const {
3453 ExtParameterInfo Copy = *this;
3454 Copy.Data |= HasPassObjSize;
3455 return Copy;
3456 }
3457
3458 bool isNoEscape() const { return Data & IsNoEscape; }
3459 ExtParameterInfo withIsNoEscape(bool NoEscape) const {
3460 ExtParameterInfo Copy = *this;
3461 if (NoEscape)
3462 Copy.Data |= IsNoEscape;
3463 else
3464 Copy.Data &= ~IsNoEscape;
3465 return Copy;
3466 }
3467
3468 unsigned char getOpaqueValue() const { return Data; }
3469 static ExtParameterInfo getFromOpaqueValue(unsigned char data) {
3470 ExtParameterInfo result;
3471 result.Data = data;
3472 return result;
3473 }
3474
3475 friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs) {
3476 return lhs.Data == rhs.Data;
3477 }
3478
3479 friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs) {
3480 return lhs.Data != rhs.Data;
3481 }
3482 };
3483
3484 /// A class which abstracts out some details necessary for
3485 /// making a call.
3486 ///
3487 /// It is not actually used directly for storing this information in
3488 /// a FunctionType, although FunctionType does currently use the
3489 /// same bit-pattern.
3490 ///
3491 // If you add a field (say Foo), other than the obvious places (both,
3492 // constructors, compile failures), what you need to update is
3493 // * Operator==
3494 // * getFoo
3495 // * withFoo
3496 // * functionType. Add Foo, getFoo.
3497 // * ASTContext::getFooType
3498 // * ASTContext::mergeFunctionTypes
3499 // * FunctionNoProtoType::Profile
3500 // * FunctionProtoType::Profile
3501 // * TypePrinter::PrintFunctionProto
3502 // * AST read and write
3503 // * Codegen
3504 class ExtInfo {
3505 friend class FunctionType;
3506
3507 // Feel free to rearrange or add bits, but if you go over 12,
3508 // you'll need to adjust both the Bits field below and
3509 // Type::FunctionTypeBitfields.
3510
3511 // | CC |noreturn|produces|nocallersavedregs|regparm|nocfcheck|
3512 // |0 .. 4| 5 | 6 | 7 |8 .. 10| 11 |
3513 //
3514 // regparm is either 0 (no regparm attribute) or the regparm value+1.
3515 enum { CallConvMask = 0x1F };
3516 enum { NoReturnMask = 0x20 };
3517 enum { ProducesResultMask = 0x40 };
3518 enum { NoCallerSavedRegsMask = 0x80 };
3519 enum { NoCfCheckMask = 0x800 };
3520 enum {
3521 RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask |
3522 NoCallerSavedRegsMask | NoCfCheckMask),
3523 RegParmOffset = 8
3524 }; // Assumed to be the last field
3525 uint16_t Bits = CC_C;
3526
3527 ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {}
3528
3529 public:
3530 // Constructor with no defaults. Use this when you know that you
3531 // have all the elements (when reading an AST file for example).
3532 ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc,
3533 bool producesResult, bool noCallerSavedRegs, bool NoCfCheck) {
3534 assert((!hasRegParm || regParm < 7) && "Invalid regparm value")(((!hasRegParm || regParm < 7) && "Invalid regparm value"
) ? static_cast<void> (0) : __assert_fail ("(!hasRegParm || regParm < 7) && \"Invalid regparm value\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 3534, __PRETTY_FUNCTION__))
;
3535 Bits = ((unsigned)cc) | (noReturn ? NoReturnMask : 0) |
3536 (producesResult ? ProducesResultMask : 0) |
3537 (noCallerSavedRegs ? NoCallerSavedRegsMask : 0) |
3538 (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0) |
3539 (NoCfCheck ? NoCfCheckMask : 0);
3540 }
3541
3542 // Constructor with all defaults. Use when for example creating a
3543 // function known to use defaults.
3544 ExtInfo() = default;
3545
3546 // Constructor with just the calling convention, which is an important part
3547 // of the canonical type.
3548 ExtInfo(CallingConv CC) : Bits(CC) {}
3549
3550 bool getNoReturn() const { return Bits & NoReturnMask; }
3551 bool getProducesResult() const { return Bits & ProducesResultMask; }
3552 bool getNoCallerSavedRegs() const { return Bits & NoCallerSavedRegsMask; }
3553 bool getNoCfCheck() const { return Bits & NoCfCheckMask; }
3554 bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; }
3555
3556 unsigned getRegParm() const {
3557 unsigned RegParm = (Bits & RegParmMask) >> RegParmOffset;
3558 if (RegParm > 0)
3559 --RegParm;
3560 return RegParm;
3561 }
3562
3563 CallingConv getCC() const { return CallingConv(Bits & CallConvMask); }
3564
3565 bool operator==(ExtInfo Other) const {
3566 return Bits == Other.Bits;
3567 }
3568 bool operator!=(ExtInfo Other) const {
3569 return Bits != Other.Bits;
3570 }
3571
3572 // Note that we don't have setters. That is by design, use
3573 // the following with methods instead of mutating these objects.
3574
3575 ExtInfo withNoReturn(bool noReturn) const {
3576 if (noReturn)
3577 return ExtInfo(Bits | NoReturnMask);
3578 else
3579 return ExtInfo(Bits & ~NoReturnMask);
3580 }
3581
3582 ExtInfo withProducesResult(bool producesResult) const {
3583 if (producesResult)
3584 return ExtInfo(Bits | ProducesResultMask);
3585 else
3586 return ExtInfo(Bits & ~ProducesResultMask);
3587 }
3588
3589 ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const {
3590 if (noCallerSavedRegs)
3591 return ExtInfo(Bits | NoCallerSavedRegsMask);
3592 else
3593 return ExtInfo(Bits & ~NoCallerSavedRegsMask);
3594 }
3595
3596 ExtInfo withNoCfCheck(bool noCfCheck) const {
3597 if (noCfCheck)
3598 return ExtInfo(Bits | NoCfCheckMask);
3599 else
3600 return ExtInfo(Bits & ~NoCfCheckMask);
3601 }
3602
3603 ExtInfo withRegParm(unsigned RegParm) const {
3604 assert(RegParm < 7 && "Invalid regparm value")((RegParm < 7 && "Invalid regparm value") ? static_cast
<void> (0) : __assert_fail ("RegParm < 7 && \"Invalid regparm value\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 3604, __PRETTY_FUNCTION__))
;
3605 return ExtInfo((Bits & ~RegParmMask) |
3606 ((RegParm + 1) << RegParmOffset));
3607 }
3608
3609 ExtInfo withCallingConv(CallingConv cc) const {
3610 return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc);
3611 }
3612
3613 void Profile(llvm::FoldingSetNodeID &ID) const {
3614 ID.AddInteger(Bits);
3615 }
3616 };
3617
3618 /// A simple holder for a QualType representing a type in an
3619 /// exception specification. Unfortunately needed by FunctionProtoType
3620 /// because TrailingObjects cannot handle repeated types.
3621 struct ExceptionType { QualType Type; };
3622
3623 /// A simple holder for various uncommon bits which do not fit in
3624 /// FunctionTypeBitfields. Aligned to alignof(void *) to maintain the
3625 /// alignment of subsequent objects in TrailingObjects. You must update
3626 /// hasExtraBitfields in FunctionProtoType after adding extra data here.
3627 struct alignas(void *) FunctionTypeExtraBitfields {
3628 /// The number of types in the exception specification.
3629 /// A whole unsigned is not needed here and according to
3630 /// [implimits] 8 bits would be enough here.
3631 unsigned NumExceptionType;
3632 };
3633
3634protected:
3635 FunctionType(TypeClass tc, QualType res,
3636 QualType Canonical, bool Dependent,
3637 bool InstantiationDependent,
3638 bool VariablyModified, bool ContainsUnexpandedParameterPack,
3639 ExtInfo Info)
3640 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified,
3641 ContainsUnexpandedParameterPack),
3642 ResultType(res) {
3643 FunctionTypeBits.ExtInfo = Info.Bits;
3644 }
3645
3646 Qualifiers getFastTypeQuals() const {
3647 return Qualifiers::fromFastMask(FunctionTypeBits.FastTypeQuals);
3648 }
3649
3650public:
3651 QualType getReturnType() const { return ResultType; }
3652
3653 bool getHasRegParm() const { return getExtInfo().getHasRegParm(); }
3654 unsigned getRegParmType() const { return getExtInfo().getRegParm(); }
3655
3656 /// Determine whether this function type includes the GNU noreturn
3657 /// attribute. The C++11 [[noreturn]] attribute does not affect the function
3658 /// type.
3659 bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); }
3660
3661 CallingConv getCallConv() const { return getExtInfo().getCC(); }
3662 ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); }
3663
3664 static_assert((~Qualifiers::FastMask & Qualifiers::CVRMask) == 0,
3665 "Const, volatile and restrict are assumed to be a subset of "
3666 "the fast qualifiers.");
3667
3668 bool isConst() const { return getFastTypeQuals().hasConst(); }
3669 bool isVolatile() const { return getFastTypeQuals().hasVolatile(); }
3670 bool isRestrict() const { return getFastTypeQuals().hasRestrict(); }
3671
3672 /// Determine the type of an expression that calls a function of
3673 /// this type.
3674 QualType getCallResultType(const ASTContext &Context) const {
3675 return getReturnType().getNonLValueExprType(Context);
3676 }
3677
3678 static StringRef getNameForCallConv(CallingConv CC);
3679
3680 static bool classof(const Type *T) {
3681 return T->getTypeClass() == FunctionNoProto ||
3682 T->getTypeClass() == FunctionProto;
3683 }
3684};
3685
3686/// Represents a K&R-style 'int foo()' function, which has
3687/// no information available about its arguments.
3688class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode {
3689 friend class ASTContext; // ASTContext creates these.
3690
3691 FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info)
3692 : FunctionType(FunctionNoProto, Result, Canonical,
3693 /*Dependent=*/false, /*InstantiationDependent=*/false,
3694 Result->isVariablyModifiedType(),
3695 /*ContainsUnexpandedParameterPack=*/false, Info) {}
3696
3697public:
3698 // No additional state past what FunctionType provides.
3699
3700 bool isSugared() const { return false; }
3701 QualType desugar() const { return QualType(this, 0); }
3702
3703 void Profile(llvm::FoldingSetNodeID &ID) {
3704 Profile(ID, getReturnType(), getExtInfo());
3705 }
3706
3707 static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType,
3708 ExtInfo Info) {
3709 Info.Profile(ID);
3710 ID.AddPointer(ResultType.getAsOpaquePtr());
3711 }
3712
3713 static bool classof(const Type *T) {
3714 return T->getTypeClass() == FunctionNoProto;
3715 }
3716};
3717
3718/// Represents a prototype with parameter type info, e.g.
3719/// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no
3720/// parameters, not as having a single void parameter. Such a type can have
3721/// an exception specification, but this specification is not part of the
3722/// canonical type. FunctionProtoType has several trailing objects, some of
3723/// which optional. For more information about the trailing objects see
3724/// the first comment inside FunctionProtoType.
3725class FunctionProtoType final
3726 : public FunctionType,
3727 public llvm::FoldingSetNode,
3728 private llvm::TrailingObjects<
3729 FunctionProtoType, QualType, FunctionType::FunctionTypeExtraBitfields,
3730 FunctionType::ExceptionType, Expr *, FunctionDecl *,
3731 FunctionType::ExtParameterInfo, Qualifiers> {
3732 friend class ASTContext; // ASTContext creates these.
3733 friend TrailingObjects;
3734
3735 // FunctionProtoType is followed by several trailing objects, some of
3736 // which optional. They are in order:
3737 //
3738 // * An array of getNumParams() QualType holding the parameter types.
3739 // Always present. Note that for the vast majority of FunctionProtoType,
3740 // these will be the only trailing objects.
3741 //
3742 // * Optionally if some extra data is stored in FunctionTypeExtraBitfields
3743 // (see FunctionTypeExtraBitfields and FunctionTypeBitfields):
3744 // a single FunctionTypeExtraBitfields. Present if and only if
3745 // hasExtraBitfields() is true.
3746 //
3747 // * Optionally exactly one of:
3748 // * an array of getNumExceptions() ExceptionType,
3749 // * a single Expr *,
3750 // * a pair of FunctionDecl *,
3751 // * a single FunctionDecl *
3752 // used to store information about the various types of exception
3753 // specification. See getExceptionSpecSize for the details.
3754 //
3755 // * Optionally an array of getNumParams() ExtParameterInfo holding
3756 // an ExtParameterInfo for each of the parameters. Present if and
3757 // only if hasExtParameterInfos() is true.
3758 //
3759 // * Optionally a Qualifiers object to represent extra qualifiers that can't
3760 // be represented by FunctionTypeBitfields.FastTypeQuals. Present if and only
3761 // if hasExtQualifiers() is true.
3762 //
3763 // The optional FunctionTypeExtraBitfields has to be before the data
3764 // related to the exception specification since it contains the number
3765 // of exception types.
3766 //
3767 // We put the ExtParameterInfos last. If all were equal, it would make
3768 // more sense to put these before the exception specification, because
3769 // it's much easier to skip past them compared to the elaborate switch
3770 // required to skip the exception specification. However, all is not
3771 // equal; ExtParameterInfos are used to model very uncommon features,
3772 // and it's better not to burden the more common paths.
3773
3774public:
3775 /// Holds information about the various types of exception specification.
3776 /// ExceptionSpecInfo is not stored as such in FunctionProtoType but is
3777 /// used to group together the various bits of information about the
3778 /// exception specification.
3779 struct ExceptionSpecInfo {
3780 /// The kind of exception specification this is.
3781 ExceptionSpecificationType Type = EST_None;
3782
3783 /// Explicitly-specified list of exception types.
3784 ArrayRef<QualType> Exceptions;
3785
3786 /// Noexcept expression, if this is a computed noexcept specification.
3787 Expr *NoexceptExpr = nullptr;
3788
3789 /// The function whose exception specification this is, for
3790 /// EST_Unevaluated and EST_Uninstantiated.
3791 FunctionDecl *SourceDecl = nullptr;
3792
3793 /// The function template whose exception specification this is instantiated
3794 /// from, for EST_Uninstantiated.
3795 FunctionDecl *SourceTemplate = nullptr;
3796
3797 ExceptionSpecInfo() = default;
3798
3799 ExceptionSpecInfo(ExceptionSpecificationType EST) : Type(EST) {}
3800 };
3801
3802 /// Extra information about a function prototype. ExtProtoInfo is not
3803 /// stored as such in FunctionProtoType but is used to group together
3804 /// the various bits of extra information about a function prototype.
3805 struct ExtProtoInfo {
3806 FunctionType::ExtInfo ExtInfo;
3807 bool Variadic : 1;
3808 bool HasTrailingReturn : 1;
3809 Qualifiers TypeQuals;
3810 RefQualifierKind RefQualifier = RQ_None;
3811 ExceptionSpecInfo ExceptionSpec;
3812 const ExtParameterInfo *ExtParameterInfos = nullptr;
3813
3814 ExtProtoInfo() : Variadic(false), HasTrailingReturn(false) {}
3815
3816 ExtProtoInfo(CallingConv CC)
3817 : ExtInfo(CC), Variadic(false), HasTrailingReturn(false) {}
3818
3819 ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &ESI) {
3820 ExtProtoInfo Result(*this);
3821 Result.ExceptionSpec = ESI;
3822 return Result;
3823 }
3824 };
3825
3826private:
3827 unsigned numTrailingObjects(OverloadToken<QualType>) const {
3828 return getNumParams();
3829 }
3830
3831 unsigned numTrailingObjects(OverloadToken<FunctionTypeExtraBitfields>) const {
3832 return hasExtraBitfields();
3833 }
3834
3835 unsigned numTrailingObjects(OverloadToken<ExceptionType>) const {
3836 return getExceptionSpecSize().NumExceptionType;
3837 }
3838
3839 unsigned numTrailingObjects(OverloadToken<Expr *>) const {
3840 return getExceptionSpecSize().NumExprPtr;
3841 }
3842
3843 unsigned numTrailingObjects(OverloadToken<FunctionDecl *>) const {
3844 return getExceptionSpecSize().NumFunctionDeclPtr;
3845 }
3846
3847 unsigned numTrailingObjects(OverloadToken<ExtParameterInfo>) const {
3848 return hasExtParameterInfos() ? getNumParams() : 0;
3849 }
3850
3851 /// Determine whether there are any argument types that
3852 /// contain an unexpanded parameter pack.
3853 static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray,
3854 unsigned numArgs) {
3855 for (unsigned Idx = 0; Idx < numArgs; ++Idx)
3856 if (ArgArray[Idx]->containsUnexpandedParameterPack())
3857 return true;
3858
3859 return false;
3860 }
3861
3862 FunctionProtoType(QualType result, ArrayRef<QualType> params,
3863 QualType canonical, const ExtProtoInfo &epi);
3864
3865 /// This struct is returned by getExceptionSpecSize and is used to
3866 /// translate an ExceptionSpecificationType to the number and kind
3867 /// of trailing objects related to the exception specification.
3868 struct ExceptionSpecSizeHolder {
3869 unsigned NumExceptionType;
3870 unsigned NumExprPtr;
3871 unsigned NumFunctionDeclPtr;
3872 };
3873
3874 /// Return the number and kind of trailing objects
3875 /// related to the exception specification.
3876 static ExceptionSpecSizeHolder
3877 getExceptionSpecSize(ExceptionSpecificationType EST, unsigned NumExceptions) {
3878 switch (EST) {
3879 case EST_None:
3880 case EST_DynamicNone:
3881 case EST_MSAny:
3882 case EST_BasicNoexcept:
3883 case EST_Unparsed:
3884 case EST_NoThrow:
3885 return {0, 0, 0};
3886
3887 case EST_Dynamic:
3888 return {NumExceptions, 0, 0};
3889
3890 case EST_DependentNoexcept:
3891 case EST_NoexceptFalse:
3892 case EST_NoexceptTrue:
3893 return {0, 1, 0};
3894
3895 case EST_Uninstantiated:
3896 return {0, 0, 2};
3897
3898 case EST_Unevaluated:
3899 return {0, 0, 1};
3900 }
3901 llvm_unreachable("bad exception specification kind")::llvm::llvm_unreachable_internal("bad exception specification kind"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 3901)
;
3902 }
3903
3904 /// Return the number and kind of trailing objects
3905 /// related to the exception specification.
3906 ExceptionSpecSizeHolder getExceptionSpecSize() const {
3907 return getExceptionSpecSize(getExceptionSpecType(), getNumExceptions());
3908 }
3909
3910 /// Whether the trailing FunctionTypeExtraBitfields is present.
3911 static bool hasExtraBitfields(ExceptionSpecificationType EST) {
3912 // If the exception spec type is EST_Dynamic then we have > 0 exception
3913 // types and the exact number is stored in FunctionTypeExtraBitfields.
3914 return EST == EST_Dynamic;
3915 }
3916
3917 /// Whether the trailing FunctionTypeExtraBitfields is present.
3918 bool hasExtraBitfields() const {
3919 return hasExtraBitfields(getExceptionSpecType());
3920 }
3921
3922 bool hasExtQualifiers() const {
3923 return FunctionTypeBits.HasExtQuals;
3924 }
3925
3926public:
3927 unsigned getNumParams() const { return FunctionTypeBits.NumParams; }
3928
3929 QualType getParamType(unsigned i) const {
3930 assert(i < getNumParams() && "invalid parameter index")((i < getNumParams() && "invalid parameter index")
? static_cast<void> (0) : __assert_fail ("i < getNumParams() && \"invalid parameter index\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 3930, __PRETTY_FUNCTION__))
;
3931 return param_type_begin()[i];
3932 }
3933
3934 ArrayRef<QualType> getParamTypes() const {
3935 return llvm::makeArrayRef(param_type_begin(), param_type_end());
3936 }
3937
3938 ExtProtoInfo getExtProtoInfo() const {
3939 ExtProtoInfo EPI;
3940 EPI.ExtInfo = getExtInfo();
3941 EPI.Variadic = isVariadic();
3942 EPI.HasTrailingReturn = hasTrailingReturn();
3943 EPI.ExceptionSpec.Type = getExceptionSpecType();
3944 EPI.TypeQuals = getMethodQuals();
3945 EPI.RefQualifier = getRefQualifier();
3946 if (EPI.ExceptionSpec.Type == EST_Dynamic) {
3947 EPI.ExceptionSpec.Exceptions = exceptions();
3948 } else if (isComputedNoexcept(EPI.ExceptionSpec.Type)) {
3949 EPI.ExceptionSpec.NoexceptExpr = getNoexceptExpr();
3950 } else if (EPI.ExceptionSpec.Type == EST_Uninstantiated) {
3951 EPI.ExceptionSpec.SourceDecl = getExceptionSpecDecl();
3952 EPI.ExceptionSpec.SourceTemplate = getExceptionSpecTemplate();
3953 } else if (EPI.ExceptionSpec.Type == EST_Unevaluated) {
3954 EPI.ExceptionSpec.SourceDecl = getExceptionSpecDecl();
3955 }
3956 EPI.ExtParameterInfos = getExtParameterInfosOrNull();
3957 return EPI;
3958 }
3959
3960 /// Get the kind of exception specification on this function.
3961 ExceptionSpecificationType getExceptionSpecType() const {
3962 return static_cast<ExceptionSpecificationType>(
3963 FunctionTypeBits.ExceptionSpecType);
3964 }
3965
3966 /// Return whether this function has any kind of exception spec.
3967 bool hasExceptionSpec() const { return getExceptionSpecType() != EST_None; }
3968
3969 /// Return whether this function has a dynamic (throw) exception spec.
3970 bool hasDynamicExceptionSpec() const {
3971 return isDynamicExceptionSpec(getExceptionSpecType());
3972 }
3973
3974 /// Return whether this function has a noexcept exception spec.
3975 bool hasNoexceptExceptionSpec() const {
3976 return isNoexceptExceptionSpec(getExceptionSpecType());
3977 }
3978
3979 /// Return whether this function has a dependent exception spec.
3980 bool hasDependentExceptionSpec() const;
3981
3982 /// Return whether this function has an instantiation-dependent exception
3983 /// spec.
3984 bool hasInstantiationDependentExceptionSpec() const;
3985
3986 /// Return the number of types in the exception specification.
3987 unsigned getNumExceptions() const {
3988 return getExceptionSpecType() == EST_Dynamic
3989 ? getTrailingObjects<FunctionTypeExtraBitfields>()
3990 ->NumExceptionType
3991 : 0;
3992 }
3993
3994 /// Return the ith exception type, where 0 <= i < getNumExceptions().
3995 QualType getExceptionType(unsigned i) const {
3996 assert(i < getNumExceptions() && "Invalid exception number!")((i < getNumExceptions() && "Invalid exception number!"
) ? static_cast<void> (0) : __assert_fail ("i < getNumExceptions() && \"Invalid exception number!\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 3996, __PRETTY_FUNCTION__))
;
3997 return exception_begin()[i];
3998 }
3999
4000 /// Return the expression inside noexcept(expression), or a null pointer
4001 /// if there is none (because the exception spec is not of this form).
4002 Expr *getNoexceptExpr() const {
4003 if (!isComputedNoexcept(getExceptionSpecType()))
4004 return nullptr;
4005 return *getTrailingObjects<Expr *>();
4006 }
4007
4008 /// If this function type has an exception specification which hasn't
4009 /// been determined yet (either because it has not been evaluated or because
4010 /// it has not been instantiated), this is the function whose exception
4011 /// specification is represented by this type.
4012 FunctionDecl *getExceptionSpecDecl() const {
4013 if (getExceptionSpecType() != EST_Uninstantiated &&
4014 getExceptionSpecType() != EST_Unevaluated)
4015 return nullptr;
4016 return getTrailingObjects<FunctionDecl *>()[0];
4017 }
4018
4019 /// If this function type has an uninstantiated exception
4020 /// specification, this is the function whose exception specification
4021 /// should be instantiated to find the exception specification for
4022 /// this type.
4023 FunctionDecl *getExceptionSpecTemplate() const {
4024 if (getExceptionSpecType() != EST_Uninstantiated)
4025 return nullptr;
4026 return getTrailingObjects<FunctionDecl *>()[1];
4027 }
4028
4029 /// Determine whether this function type has a non-throwing exception
4030 /// specification.
4031 CanThrowResult canThrow() const;
4032
4033 /// Determine whether this function type has a non-throwing exception
4034 /// specification. If this depends on template arguments, returns
4035 /// \c ResultIfDependent.
4036 bool isNothrow(bool ResultIfDependent = false) const {
4037 return ResultIfDependent ? canThrow() != CT_Can : canThrow() == CT_Cannot;
4038 }
4039
4040 /// Whether this function prototype is variadic.
4041 bool isVariadic() const { return FunctionTypeBits.Variadic; }
4042
4043 /// Determines whether this function prototype contains a
4044 /// parameter pack at the end.
4045 ///
4046 /// A function template whose last parameter is a parameter pack can be
4047 /// called with an arbitrary number of arguments, much like a variadic
4048 /// function.
4049 bool isTemplateVariadic() const;
4050
4051 /// Whether this function prototype has a trailing return type.
4052 bool hasTrailingReturn() const { return FunctionTypeBits.HasTrailingReturn; }
4053
4054 Qualifiers getMethodQuals() const {
4055 if (hasExtQualifiers())
4056 return *getTrailingObjects<Qualifiers>();
4057 else
4058 return getFastTypeQuals();
4059 }
4060
4061 /// Retrieve the ref-qualifier associated with this function type.
4062 RefQualifierKind getRefQualifier() const {
4063 return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier);
4064 }
4065
4066 using param_type_iterator = const QualType *;
4067 using param_type_range = llvm::iterator_range<param_type_iterator>;
4068
4069 param_type_range param_types() const {
4070 return param_type_range(param_type_begin(), param_type_end());
4071 }
4072
4073 param_type_iterator param_type_begin() const {
4074 return getTrailingObjects<QualType>();
4075 }
4076
4077 param_type_iterator param_type_end() const {
4078 return param_type_begin() + getNumParams();
4079 }
4080
4081 using exception_iterator = const QualType *;
4082
4083 ArrayRef<QualType> exceptions() const {
4084 return llvm::makeArrayRef(exception_begin(), exception_end());
4085 }
4086
4087 exception_iterator exception_begin() const {
4088 return reinterpret_cast<exception_iterator>(
4089 getTrailingObjects<ExceptionType>());
4090 }
4091
4092 exception_iterator exception_end() const {
4093 return exception_begin() + getNumExceptions();
4094 }
4095
4096 /// Is there any interesting extra information for any of the parameters
4097 /// of this function type?
4098 bool hasExtParameterInfos() const {
4099 return FunctionTypeBits.HasExtParameterInfos;
4100 }
4101
4102 ArrayRef<ExtParameterInfo> getExtParameterInfos() const {
4103 assert(hasExtParameterInfos())((hasExtParameterInfos()) ? static_cast<void> (0) : __assert_fail
("hasExtParameterInfos()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 4103, __PRETTY_FUNCTION__))
;
4104 return ArrayRef<ExtParameterInfo>(getTrailingObjects<ExtParameterInfo>(),
4105 getNumParams());
4106 }
4107
4108 /// Return a pointer to the beginning of the array of extra parameter
4109 /// information, if present, or else null if none of the parameters
4110 /// carry it. This is equivalent to getExtProtoInfo().ExtParameterInfos.
4111 const ExtParameterInfo *getExtParameterInfosOrNull() const {
4112 if (!hasExtParameterInfos())
4113 return nullptr;
4114 return getTrailingObjects<ExtParameterInfo>();
4115 }
4116
4117 ExtParameterInfo getExtParameterInfo(unsigned I) const {
4118 assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range"
) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 4118, __PRETTY_FUNCTION__))
;
4119 if (hasExtParameterInfos())
4120 return getTrailingObjects<ExtParameterInfo>()[I];
4121 return ExtParameterInfo();
4122 }
4123
4124 ParameterABI getParameterABI(unsigned I) const {
4125 assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range"
) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 4125, __PRETTY_FUNCTION__))
;
4126 if (hasExtParameterInfos())
4127 return getTrailingObjects<ExtParameterInfo>()[I].getABI();
4128 return ParameterABI::Ordinary;
4129 }
4130
4131 bool isParamConsumed(unsigned I) const {
4132 assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range"
) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 4132, __PRETTY_FUNCTION__))
;
4133 if (hasExtParameterInfos())
4134 return getTrailingObjects<ExtParameterInfo>()[I].isConsumed();
4135 return false;
4136 }
4137
4138 bool isSugared() const { return false; }
4139 QualType desugar() const { return QualType(this, 0); }
4140
4141 void printExceptionSpecification(raw_ostream &OS,
4142 const PrintingPolicy &Policy) const;
4143
4144 static bool classof(const Type *T) {
4145 return T->getTypeClass() == FunctionProto;
4146 }
4147
4148 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx);
4149 static void Profile(llvm::FoldingSetNodeID &ID, QualType Result,
4150 param_type_iterator ArgTys, unsigned NumArgs,
4151 const ExtProtoInfo &EPI, const ASTContext &Context,
4152 bool Canonical);
4153};
4154
4155/// Represents the dependent type named by a dependently-scoped
4156/// typename using declaration, e.g.
4157/// using typename Base<T>::foo;
4158///
4159/// Template instantiation turns these into the underlying type.
4160class UnresolvedUsingType : public Type {
4161 friend class ASTContext; // ASTContext creates these.
4162
4163 UnresolvedUsingTypenameDecl *Decl;
4164
4165 UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D)
4166 : Type(UnresolvedUsing, QualType(), true, true, false,
4167 /*ContainsUnexpandedParameterPack=*/false),
4168 Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {}
4169
4170public:
4171 UnresolvedUsingTypenameDecl *getDecl() const { return Decl; }
4172
4173 bool isSugared() const { return false; }
4174 QualType desugar() const { return QualType(this, 0); }
4175
4176 static bool classof(const Type *T) {
4177 return T->getTypeClass() == UnresolvedUsing;
4178 }
4179
4180 void Profile(llvm::FoldingSetNodeID &ID) {
4181 return Profile(ID, Decl);
4182 }
4183
4184 static void Profile(llvm::FoldingSetNodeID &ID,
4185 UnresolvedUsingTypenameDecl *D) {
4186 ID.AddPointer(D);
4187 }
4188};
4189
4190class TypedefType : public Type {
4191 TypedefNameDecl *Decl;
4192
4193protected:
4194 friend class ASTContext; // ASTContext creates these.
4195
4196 TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can)
4197 : Type(tc, can, can->isDependentType(),
4198 can->isInstantiationDependentType(),
4199 can->isVariablyModifiedType(),
4200 /*ContainsUnexpandedParameterPack=*/false),
4201 Decl(const_cast<TypedefNameDecl*>(D)) {
4202 assert(!isa<TypedefType>(can) && "Invalid canonical type")((!isa<TypedefType>(can) && "Invalid canonical type"
) ? static_cast<void> (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 4202, __PRETTY_FUNCTION__))
;
4203 }
4204
4205public:
4206 TypedefNameDecl *getDecl() const { return Decl; }
4207
4208 bool isSugared() const { return true; }
4209 QualType desugar() const;
4210
4211 static bool classof(const Type *T) { return T->getTypeClass() == Typedef; }
4212};
4213
4214/// Sugar type that represents a type that was qualified by a qualifier written
4215/// as a macro invocation.
4216class MacroQualifiedType : public Type {
4217 friend class ASTContext; // ASTContext creates these.
4218
4219 QualType UnderlyingTy;
4220 const IdentifierInfo *MacroII;
4221
4222 MacroQualifiedType(QualType UnderlyingTy, QualType CanonTy,
4223 const IdentifierInfo *MacroII)
4224 : Type(MacroQualified, CanonTy, UnderlyingTy->isDependentType(),
4225 UnderlyingTy->isInstantiationDependentType(),
4226 UnderlyingTy->isVariablyModifiedType(),
4227 UnderlyingTy->containsUnexpandedParameterPack()),
4228 UnderlyingTy(UnderlyingTy), MacroII(MacroII) {
4229 assert(isa<AttributedType>(UnderlyingTy) &&((isa<AttributedType>(UnderlyingTy) && "Expected a macro qualified type to only wrap attributed types."
) ? static_cast<void> (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 4230, __PRETTY_FUNCTION__))
4230 "Expected a macro qualified type to only wrap attributed types.")((isa<AttributedType>(UnderlyingTy) && "Expected a macro qualified type to only wrap attributed types."
) ? static_cast<void> (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 4230, __PRETTY_FUNCTION__))
;
4231 }
4232
4233public:
4234 const IdentifierInfo *getMacroIdentifier() const { return MacroII; }
4235 QualType getUnderlyingType() const { return UnderlyingTy; }
4236
4237 /// Return this attributed type's modified type with no qualifiers attached to
4238 /// it.
4239 QualType getModifiedType() const;
4240
4241 bool isSugared() const { return true; }
4242 QualType desugar() const;
4243
4244 static bool classof(const Type *T) {
4245 return T->getTypeClass() == MacroQualified;
4246 }
4247};
4248
4249/// Represents a `typeof` (or __typeof__) expression (a GCC extension).
4250class TypeOfExprType : public Type {
4251 Expr *TOExpr;
4252
4253protected:
4254 friend class ASTContext; // ASTContext creates these.
4255
4256 TypeOfExprType(Expr *E, QualType can = QualType());
4257
4258public:
4259 Expr *getUnderlyingExpr() const { return TOExpr; }
4260
4261 /// Remove a single level of sugar.
4262 QualType desugar() const;
4263
4264 /// Returns whether this type directly provides sugar.
4265 bool isSugared() const;
4266
4267 static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; }
4268};
4269
4270/// Internal representation of canonical, dependent
4271/// `typeof(expr)` types.
4272///
4273/// This class is used internally by the ASTContext to manage
4274/// canonical, dependent types, only. Clients will only see instances
4275/// of this class via TypeOfExprType nodes.
4276class DependentTypeOfExprType
4277 : public TypeOfExprType, public llvm::FoldingSetNode {
4278 const ASTContext &Context;
4279
4280public:
4281 DependentTypeOfExprType(const ASTContext &Context, Expr *E)
4282 : TypeOfExprType(E), Context(Context) {}
4283
4284 void Profile(llvm::FoldingSetNodeID &ID) {
4285 Profile(ID, Context, getUnderlyingExpr());
4286 }
4287
4288 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
4289 Expr *E);
4290};
4291
4292/// Represents `typeof(type)`, a GCC extension.
4293class TypeOfType : public Type {
4294 friend class ASTContext; // ASTContext creates these.
4295
4296 QualType TOType;
4297
4298 TypeOfType(QualType T, QualType can)
4299 : Type(TypeOf, can, T->isDependentType(),
4300 T->isInstantiationDependentType(),
4301 T->isVariablyModifiedType(),
4302 T->containsUnexpandedParameterPack()),
4303 TOType(T) {
4304 assert(!isa<TypedefType>(can) && "Invalid canonical type")((!isa<TypedefType>(can) && "Invalid canonical type"
) ? static_cast<void> (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 4304, __PRETTY_FUNCTION__))
;
4305 }
4306
4307public:
4308 QualType getUnderlyingType() const { return TOType; }
4309
4310 /// Remove a single level of sugar.
4311 QualType desugar() const { return getUnderlyingType(); }
4312
4313 /// Returns whether this type directly provides sugar.
4314 bool isSugared() const { return true; }
4315
4316 static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; }
4317};
4318
4319/// Represents the type `decltype(expr)` (C++11).
4320class DecltypeType : public Type {
4321 Expr *E;
4322 QualType UnderlyingType;
4323
4324protected:
4325 friend class ASTContext; // ASTContext creates these.
4326
4327 DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType());
4328
4329public:
4330 Expr *getUnderlyingExpr() const { return E; }
4331 QualType getUnderlyingType() const { return UnderlyingType; }
4332
4333 /// Remove a single level of sugar.
4334 QualType desugar() const;
4335
4336 /// Returns whether this type directly provides sugar.
4337 bool isSugared() const;
4338
4339 static bool classof(const Type *T) { return T->getTypeClass() == Decltype; }
4340};
4341
4342/// Internal representation of canonical, dependent
4343/// decltype(expr) types.
4344///
4345/// This class is used internally by the ASTContext to manage
4346/// canonical, dependent types, only. Clients will only see instances
4347/// of this class via DecltypeType nodes.
4348class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode {
4349 const ASTContext &Context;
4350
4351public:
4352 DependentDecltypeType(const ASTContext &Context, Expr *E);
4353
4354 void Profile(llvm::FoldingSetNodeID &ID) {
4355 Profile(ID, Context, getUnderlyingExpr());
4356 }
4357
4358 static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
4359 Expr *E);
4360};
4361
4362/// A unary type transform, which is a type constructed from another.
4363class UnaryTransformType : public Type {
4364public:
4365 enum UTTKind {
4366 EnumUnderlyingType
4367 };
4368
4369private:
4370 /// The untransformed type.
4371 QualType BaseType;
4372
4373 /// The transformed type if not dependent, otherwise the same as BaseType.
4374 QualType UnderlyingType;
4375
4376 UTTKind UKind;
4377
4378protected:
4379 friend class ASTContext;
4380
4381 UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind,
4382 QualType CanonicalTy);
4383
4384public:
4385 bool isSugared() const { return !isDependentType(); }
4386 QualType desugar() const { return UnderlyingType; }
4387
4388 QualType getUnderlyingType() const { return UnderlyingType; }
4389 QualType getBaseType() const { return BaseType; }
4390
4391 UTTKind getUTTKind() const { return UKind; }
4392
4393 static bool classof(const Type *T) {
4394 return T->getTypeClass() == UnaryTransform;
4395 }
4396};
4397
4398/// Internal representation of canonical, dependent
4399/// __underlying_type(type) types.
4400///
4401/// This class is used internally by the ASTContext to manage
4402/// canonical, dependent types, only. Clients will only see instances
4403/// of this class via UnaryTransformType nodes.
4404class DependentUnaryTransformType : public UnaryTransformType,
4405 public llvm::FoldingSetNode {
4406public:
4407 DependentUnaryTransformType(const ASTContext &C, QualType BaseType,
4408 UTTKind UKind);
4409
4410 void Profile(llvm::FoldingSetNodeID &ID) {
4411 Profile(ID, getBaseType(), getUTTKind());
4412 }
4413
4414 static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType,
4415 UTTKind UKind) {
4416 ID.AddPointer(BaseType.getAsOpaquePtr());
4417 ID.AddInteger((unsigned)UKind);
4418 }
4419};
4420
4421class TagType : public Type {
4422 friend class ASTReader;
4423
4424 /// Stores the TagDecl associated with this type. The decl may point to any
4425 /// TagDecl that declares the entity.
4426 TagDecl *decl;
4427
4428protected:
4429 TagType(TypeClass TC, const TagDecl *D, QualType can);
4430
4431public:
4432 TagDecl *getDecl() const;
4433
4434 /// Determines whether this type is in the process of being defined.
4435 bool isBeingDefined() const;
4436
4437 static bool classof(const Type *T) {
4438 return T->getTypeClass() == Enum || T->getTypeClass() == Record;
4439 }
4440};
4441
4442/// A helper class that allows the use of isa/cast/dyncast
4443/// to detect TagType objects of structs/unions/classes.
4444class RecordType : public TagType {
4445protected:
4446 friend class ASTContext; // ASTContext creates these.
4447
4448 explicit RecordType(const RecordDecl *D)
4449 : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) {}
4450 explicit RecordType(TypeClass TC, RecordDecl *D)
4451 : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) {}
4452
4453public:
4454 RecordDecl *getDecl() const {
4455 return reinterpret_cast<RecordDecl*>(TagType::getDecl());
4456 }
4457
4458 /// Recursively check all fields in the record for const-ness. If any field
4459 /// is declared const, return true. Otherwise, return false.
4460 bool hasConstFields() const;
4461
4462 bool isSugared() const { return false; }
4463 QualType desugar() const { return QualType(this, 0); }
4464
4465 static bool classof(const Type *T) { return T->getTypeClass() == Record; }
4466};
4467
4468/// A helper class that allows the use of isa/cast/dyncast
4469/// to detect TagType objects of enums.
4470class EnumType : public TagType {
4471 friend class ASTContext; // ASTContext creates these.
4472
4473 explicit EnumType(const EnumDecl *D)
4474 : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) {}
4475
4476public:
4477 EnumDecl *getDecl() const {
4478 return reinterpret_cast<EnumDecl*>(TagType::getDecl());
4479 }
4480
4481 bool isSugared() const { return false; }
4482 QualType desugar() const { return QualType(this, 0); }
4483
4484 static bool classof(const Type *T) { return T->getTypeClass() == Enum; }
4485};
4486
4487/// An attributed type is a type to which a type attribute has been applied.
4488///
4489/// The "modified type" is the fully-sugared type to which the attributed
4490/// type was applied; generally it is not canonically equivalent to the
4491/// attributed type. The "equivalent type" is the minimally-desugared type
4492/// which the type is canonically equivalent to.
4493///
4494/// For example, in the following attributed type:
4495/// int32_t __attribute__((vector_size(16)))
4496/// - the modified type is the TypedefType for int32_t
4497/// - the equivalent type is VectorType(16, int32_t)
4498/// - the canonical type is VectorType(16, int)
4499class AttributedType : public Type, public llvm::FoldingSetNode {
4500public:
4501 using Kind = attr::Kind;
4502
4503private:
4504 friend class ASTContext; // ASTContext creates these
4505
4506 QualType ModifiedType;
4507 QualType EquivalentType;
4508
4509 AttributedType(QualType canon, attr::Kind attrKind, QualType modified,
4510 QualType equivalent)
4511 : Type(Attributed, canon, equivalent->isDependentType(),
4512 equivalent->isInstantiationDependentType(),
4513 equivalent->isVariablyModifiedType(),
4514 equivalent->containsUnexpandedParameterPack()),
4515 ModifiedType(modified), EquivalentType(equivalent) {
4516 AttributedTypeBits.AttrKind = attrKind;
4517 }
4518
4519public:
4520 Kind getAttrKind() const {
4521 return static_cast<Kind>(AttributedTypeBits.AttrKind);
4522 }
4523
4524 QualType getModifiedType() const { return ModifiedType; }
4525 QualType getEquivalentType() const { return EquivalentType; }
4526
4527 bool isSugared() const { return true; }
4528 QualType desugar() const { return getEquivalentType(); }
4529
4530 /// Does this attribute behave like a type qualifier?
4531 ///
4532 /// A type qualifier adjusts a type to provide specialized rules for
4533 /// a specific object, like the standard const and volatile qualifiers.
4534 /// This includes attributes controlling things like nullability,
4535 /// address spaces, and ARC ownership. The value of the object is still
4536 /// largely described by the modified type.
4537 ///
4538 /// In contrast, many type attributes "rewrite" their modified type to
4539 /// produce a fundamentally different type, not necessarily related in any
4540 /// formalizable way to the original type. For example, calling convention
4541 /// and vector attributes are not simple type qualifiers.
4542 ///
4543 /// Type qualifiers are often, but not always, reflected in the canonical
4544 /// type.
4545 bool isQualifier() const;
4546
4547 bool isMSTypeSpec() const;
4548
4549 bool isCallingConv() const;
4550
4551 llvm::Optional<NullabilityKind> getImmediateNullability() const;
4552
4553 /// Retrieve the attribute kind corresponding to the given
4554 /// nullability kind.
4555 static Kind getNullabilityAttrKind(NullabilityKind kind) {
4556 switch (kind) {
4557 case NullabilityKind::NonNull:
4558 return attr::TypeNonNull;
4559
4560 case NullabilityKind::Nullable:
4561 return attr::TypeNullable;
4562
4563 case NullabilityKind::Unspecified:
4564 return attr::TypeNullUnspecified;
4565 }
4566 llvm_unreachable("Unknown nullability kind.")::llvm::llvm_unreachable_internal("Unknown nullability kind."
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 4566)
;
4567 }
4568
4569 /// Strip off the top-level nullability annotation on the given
4570 /// type, if it's there.
4571 ///
4572 /// \param T The type to strip. If the type is exactly an
4573 /// AttributedType specifying nullability (without looking through
4574 /// type sugar), the nullability is returned and this type changed
4575 /// to the underlying modified type.
4576 ///
4577 /// \returns the top-level nullability, if present.
4578 static Optional<NullabilityKind> stripOuterNullability(QualType &T);
4579
4580 void Profile(llvm::FoldingSetNodeID &ID) {
4581 Profile(ID, getAttrKind(), ModifiedType, EquivalentType);
4582 }
4583
4584 static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind,
4585 QualType modified, QualType equivalent) {
4586 ID.AddInteger(attrKind);
4587 ID.AddPointer(modified.getAsOpaquePtr());
4588 ID.AddPointer(equivalent.getAsOpaquePtr());
4589 }
4590
4591 static bool classof(const Type *T) {
4592 return T->getTypeClass() == Attributed;
4593 }
4594};
4595
4596class TemplateTypeParmType : public Type, public llvm::FoldingSetNode {
4597 friend class ASTContext; // ASTContext creates these
4598
4599 // Helper data collector for canonical types.
4600 struct CanonicalTTPTInfo {
4601 unsigned Depth : 15;
4602 unsigned ParameterPack : 1;
4603 unsigned Index : 16;
4604 };
4605
4606 union {
4607 // Info for the canonical type.
4608 CanonicalTTPTInfo CanTTPTInfo;
4609
4610 // Info for the non-canonical type.
4611 TemplateTypeParmDecl *TTPDecl;
4612 };
4613
4614 /// Build a non-canonical type.
4615 TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon)
4616 : Type(TemplateTypeParm, Canon, /*Dependent=*/true,
4617 /*InstantiationDependent=*/true,
4618 /*VariablyModified=*/false,
4619 Canon->containsUnexpandedParameterPack()),
4620 TTPDecl(TTPDecl) {}
4621
4622 /// Build the canonical type.
4623 TemplateTypeParmType(unsigned D, unsigned I, bool PP)
4624 : Type(TemplateTypeParm, QualType(this, 0),
4625 /*Dependent=*/true,
4626 /*InstantiationDependent=*/true,
4627 /*VariablyModified=*/false, PP) {
4628 CanTTPTInfo.Depth = D;
4629 CanTTPTInfo.Index = I;
4630 CanTTPTInfo.ParameterPack = PP;
4631 }
4632
4633 const CanonicalTTPTInfo& getCanTTPTInfo() const {
4634 QualType Can = getCanonicalTypeInternal();
4635 return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo;
4636 }
4637
4638public:
4639 unsigned getDepth() const { return getCanTTPTInfo().Depth; }
4640 unsigned getIndex() const { return getCanTTPTInfo().Index; }
4641 bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; }
4642
4643 TemplateTypeParmDecl *getDecl() const {
4644 return isCanonicalUnqualified() ? nullptr : TTPDecl;
4645 }
4646
4647 IdentifierInfo *getIdentifier() const;
4648
4649 bool isSugared() const { return false; }
4650 QualType desugar() const { return QualType(this, 0); }
4651
4652 void Profile(llvm::FoldingSetNodeID &ID) {
4653 Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl());
4654 }
4655
4656 static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth,
4657 unsigned Index, bool ParameterPack,
4658 TemplateTypeParmDecl *TTPDecl) {
4659 ID.AddInteger(Depth);
4660 ID.AddInteger(Index);
4661 ID.AddBoolean(ParameterPack);
4662 ID.AddPointer(TTPDecl);
4663 }
4664
4665 static bool classof(const Type *T) {
4666 return T->getTypeClass() == TemplateTypeParm;
4667 }
4668};
4669
4670/// Represents the result of substituting a type for a template
4671/// type parameter.
4672///
4673/// Within an instantiated template, all template type parameters have
4674/// been replaced with these. They are used solely to record that a
4675/// type was originally written as a template type parameter;
4676/// therefore they are never canonical.
4677class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode {
4678 friend class ASTContext;
4679
4680 // The original type parameter.
4681 const TemplateTypeParmType *Replaced;
4682
4683 SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon)
4684 : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(),
4685 Canon->isInstantiationDependentType(),
4686 Canon->isVariablyModifiedType(),
4687 Canon->containsUnexpandedParameterPack()),
4688 Replaced(Param) {}
4689
4690public:
4691 /// Gets the template parameter that was substituted for.
4692 const TemplateTypeParmType *getReplacedParameter() const {
4693 return Replaced;
4694 }
4695
4696 /// Gets the type that was substituted for the template
4697 /// parameter.
4698 QualType getReplacementType() const {
4699 return getCanonicalTypeInternal();
4700 }
4701
4702 bool isSugared() const { return true; }
4703 QualType desugar() const { return getReplacementType(); }
4704
4705 void Profile(llvm::FoldingSetNodeID &ID) {
4706 Profile(ID, getReplacedParameter(), getReplacementType());
4707 }
4708
4709 static void Profile(llvm::FoldingSetNodeID &ID,
4710 const TemplateTypeParmType *Replaced,
4711 QualType Replacement) {
4712 ID.AddPointer(Replaced);
4713 ID.AddPointer(Replacement.getAsOpaquePtr());
4714 }
4715
4716 static bool classof(const Type *T) {
4717 return T->getTypeClass() == SubstTemplateTypeParm;
4718 }
4719};
4720
4721/// Represents the result of substituting a set of types for a template
4722/// type parameter pack.
4723///
4724/// When a pack expansion in the source code contains multiple parameter packs
4725/// and those parameter packs correspond to different levels of template
4726/// parameter lists, this type node is used to represent a template type
4727/// parameter pack from an outer level, which has already had its argument pack
4728/// substituted but that still lives within a pack expansion that itself
4729/// could not be instantiated. When actually performing a substitution into
4730/// that pack expansion (e.g., when all template parameters have corresponding
4731/// arguments), this type will be replaced with the \c SubstTemplateTypeParmType
4732/// at the current pack substitution index.
4733class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode {
4734 friend class ASTContext;
4735
4736 /// The original type parameter.
4737 const TemplateTypeParmType *Replaced;
4738
4739 /// A pointer to the set of template arguments that this
4740 /// parameter pack is instantiated with.
4741 const TemplateArgument *Arguments;
4742
4743 SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param,
4744 QualType Canon,
4745 const TemplateArgument &ArgPack);
4746
4747public:
4748 IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); }
4749
4750 /// Gets the template parameter that was substituted for.
4751 const TemplateTypeParmType *getReplacedParameter() const {
4752 return Replaced;
4753 }
4754
4755 unsigned getNumArgs() const {
4756 return SubstTemplateTypeParmPackTypeBits.NumArgs;
4757 }
4758
4759 bool isSugared() const { return false; }
4760 QualType desugar() const { return QualType(this, 0); }
4761
4762 TemplateArgument getArgumentPack() const;
4763
4764 void Profile(llvm::FoldingSetNodeID &ID);
4765 static void Profile(llvm::FoldingSetNodeID &ID,
4766 const TemplateTypeParmType *Replaced,
4767 const TemplateArgument &ArgPack);
4768
4769 static bool classof(const Type *T) {
4770 return T->getTypeClass() == SubstTemplateTypeParmPack;
4771 }
4772};
4773
4774/// Common base class for placeholders for types that get replaced by
4775/// placeholder type deduction: C++11 auto, C++14 decltype(auto), C++17 deduced
4776/// class template types, and (eventually) constrained type names from the C++
4777/// Concepts TS.
4778///
4779/// These types are usually a placeholder for a deduced type. However, before
4780/// the initializer is attached, or (usually) if the initializer is
4781/// type-dependent, there is no deduced type and the type is canonical. In
4782/// the latter case, it is also a dependent type.
4783class DeducedType : public Type {
4784protected:
4785 DeducedType(TypeClass TC, QualType DeducedAsType, bool IsDependent,
4786 bool IsInstantiationDependent, bool ContainsParameterPack)
4787 : Type(TC,
4788 // FIXME: Retain the sugared deduced type?
4789 DeducedAsType.isNull() ? QualType(this, 0)
4790 : DeducedAsType.getCanonicalType(),
4791 IsDependent, IsInstantiationDependent,
4792 /*VariablyModified=*/false, ContainsParameterPack) {
4793 if (!DeducedAsType.isNull()) {
4794 if (DeducedAsType->isDependentType())
4795 setDependent();
4796 if (DeducedAsType->isInstantiationDependentType())
4797 setInstantiationDependent();
4798 if (DeducedAsType->containsUnexpandedParameterPack())
4799 setContainsUnexpandedParameterPack();
4800 }
4801 }
4802
4803public:
4804 bool isSugared() const { return !isCanonicalUnqualified(); }
4805 QualType desugar() const { return getCanonicalTypeInternal(); }
4806
4807 /// Get the type deduced for this placeholder type, or null if it's
4808 /// either not been deduced or was deduced to a dependent type.
4809 QualType getDeducedType() const {
4810 return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType();
4811 }
4812 bool isDeduced() const {
4813 return !isCanonicalUnqualified() || isDependentType();
4814 }
4815
4816 static bool classof(const Type *T) {
4817 return T->getTypeClass() == Auto ||
4818 T->getTypeClass() == DeducedTemplateSpecialization;
4819 }
4820};
4821
4822/// Represents a C++11 auto or C++14 decltype(auto) type.
4823class AutoType : public DeducedType, public llvm::FoldingSetNode {
4824 friend class ASTContext; // ASTContext creates these
4825
4826 AutoType(QualType DeducedAsType, AutoTypeKeyword Keyword,
4827 bool IsDeducedAsDependent, bool IsDeducedAsPack)
4828 : DeducedType(Auto, DeducedAsType, IsDeducedAsDependent,
4829 IsDeducedAsDependent, IsDeducedAsPack) {
4830 AutoTypeBits.Keyword = (unsigned)Keyword;
4831 }
4832
4833public:
4834 bool isDecltypeAuto() const {
4835 return getKeyword() == AutoTypeKeyword::DecltypeAuto;
4836 }
4837
4838 AutoTypeKeyword getKeyword() const {
4839 return (AutoTypeKeyword)AutoTypeBits.Keyword;
4840 }
4841
4842 void Profile(llvm::FoldingSetNodeID &ID) {
4843 Profile(ID, getDeducedType(), getKeyword(), isDependentType(),
4844 containsUnexpandedParameterPack());
4845 }
4846
4847 static void Profile(llvm::FoldingSetNodeID &ID, QualType Deduced,
4848 AutoTypeKeyword Keyword, bool IsDependent, bool IsPack) {
4849 ID.AddPointer(Deduced.getAsOpaquePtr());
4850 ID.AddInteger((unsigned)Keyword);
4851 ID.AddBoolean(IsDependent);
4852 ID.AddBoolean(IsPack);
4853 }
4854
4855 static bool classof(const Type *T) {
4856 return T->getTypeClass() == Auto;
4857 }
4858};
4859
4860/// Represents a C++17 deduced template specialization type.
4861class DeducedTemplateSpecializationType : public DeducedType,
4862 public llvm::FoldingSetNode {
4863 friend class ASTContext; // ASTContext creates these
4864
4865 /// The name of the template whose arguments will be deduced.
4866 TemplateName Template;
4867
4868 DeducedTemplateSpecializationType(TemplateName Template,
4869 QualType DeducedAsType,
4870 bool IsDeducedAsDependent)
4871 : DeducedType(DeducedTemplateSpecialization, DeducedAsType,
4872 IsDeducedAsDependent || Template.isDependent(),
4873 IsDeducedAsDependent || Template.isInstantiationDependent(),
4874 Template.containsUnexpandedParameterPack()),
4875 Template(Template) {}
4876
4877public:
4878 /// Retrieve the name of the template that we are deducing.
4879 TemplateName getTemplateName() const { return Template;}
4880
4881 void Profile(llvm::FoldingSetNodeID &ID) {
4882 Profile(ID, getTemplateName(), getDeducedType(), isDependentType());
4883 }
4884
4885 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template,
4886 QualType Deduced, bool IsDependent) {
4887 Template.Profile(ID);
4888 ID.AddPointer(Deduced.getAsOpaquePtr());
4889 ID.AddBoolean(IsDependent);
4890 }
4891
4892 static bool classof(const Type *T) {
4893 return T->getTypeClass() == DeducedTemplateSpecialization;
4894 }
4895};
4896
4897/// Represents a type template specialization; the template
4898/// must be a class template, a type alias template, or a template
4899/// template parameter. A template which cannot be resolved to one of
4900/// these, e.g. because it is written with a dependent scope
4901/// specifier, is instead represented as a
4902/// @c DependentTemplateSpecializationType.
4903///
4904/// A non-dependent template specialization type is always "sugar",
4905/// typically for a \c RecordType. For example, a class template
4906/// specialization type of \c vector<int> will refer to a tag type for
4907/// the instantiation \c std::vector<int, std::allocator<int>>
4908///
4909/// Template specializations are dependent if either the template or
4910/// any of the template arguments are dependent, in which case the
4911/// type may also be canonical.
4912///
4913/// Instances of this type are allocated with a trailing array of
4914/// TemplateArguments, followed by a QualType representing the
4915/// non-canonical aliased type when the template is a type alias
4916/// template.
4917class alignas(8) TemplateSpecializationType
4918 : public Type,
4919 public llvm::FoldingSetNode {
4920 friend class ASTContext; // ASTContext creates these
4921
4922 /// The name of the template being specialized. This is
4923 /// either a TemplateName::Template (in which case it is a
4924 /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a
4925 /// TypeAliasTemplateDecl*), a
4926 /// TemplateName::SubstTemplateTemplateParmPack, or a
4927 /// TemplateName::SubstTemplateTemplateParm (in which case the
4928 /// replacement must, recursively, be one of these).
4929 TemplateName Template;
4930
4931 TemplateSpecializationType(TemplateName T,
4932 ArrayRef<TemplateArgument> Args,
4933 QualType Canon,
4934 QualType Aliased);
4935
4936public:
4937 /// Determine whether any of the given template arguments are dependent.
4938 static bool anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args,
4939 bool &InstantiationDependent);
4940
4941 static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &,
4942 bool &InstantiationDependent);
4943
4944 /// True if this template specialization type matches a current
4945 /// instantiation in the context in which it is found.
4946 bool isCurrentInstantiation() const {
4947 return isa<InjectedClassNameType>(getCanonicalTypeInternal());
4948 }
4949
4950 /// Determine if this template specialization type is for a type alias
4951 /// template that has been substituted.
4952 ///
4953 /// Nearly every template specialization type whose template is an alias
4954 /// template will be substituted. However, this is not the case when
4955 /// the specialization contains a pack expansion but the template alias
4956 /// does not have a corresponding parameter pack, e.g.,
4957 ///
4958 /// \code
4959 /// template<typename T, typename U, typename V> struct S;
4960 /// template<typename T, typename U> using A = S<T, int, U>;
4961 /// template<typename... Ts> struct X {
4962 /// typedef A<Ts...> type; // not a type alias
4963 /// };
4964 /// \endcode
4965 bool isTypeAlias() const { return TemplateSpecializationTypeBits.TypeAlias; }
4966
4967 /// Get the aliased type, if this is a specialization of a type alias
4968 /// template.
4969 QualType getAliasedType() const {
4970 assert(isTypeAlias() && "not a type alias template specialization")((isTypeAlias() && "not a type alias template specialization"
) ? static_cast<void> (0) : __assert_fail ("isTypeAlias() && \"not a type alias template specialization\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 4970, __PRETTY_FUNCTION__))
;
4971 return *reinterpret_cast<const QualType*>(end());
4972 }
4973
4974 using iterator = const TemplateArgument *;
4975
4976 iterator begin() const { return getArgs(); }
4977 iterator end() const; // defined inline in TemplateBase.h
4978
4979 /// Retrieve the name of the template that we are specializing.
4980 TemplateName getTemplateName() const { return Template; }
4981
4982 /// Retrieve the template arguments.
4983 const TemplateArgument *getArgs() const {
4984 return reinterpret_cast<const TemplateArgument *>(this + 1);
4985 }
4986
4987 /// Retrieve the number of template arguments.
4988 unsigned getNumArgs() const {
4989 return TemplateSpecializationTypeBits.NumArgs;
4990 }
4991
4992 /// Retrieve a specific template argument as a type.
4993 /// \pre \c isArgType(Arg)
4994 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h
4995
4996 ArrayRef<TemplateArgument> template_arguments() const {
4997 return {getArgs(), getNumArgs()};
4998 }
4999
5000 bool isSugared() const {
5001 return !isDependentType() || isCurrentInstantiation() || isTypeAlias();
5002 }
5003
5004 QualType desugar() const {
5005 return isTypeAlias() ? getAliasedType() : getCanonicalTypeInternal();
5006 }
5007
5008 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) {
5009 Profile(ID, Template, template_arguments(), Ctx);
5010 if (isTypeAlias())
5011 getAliasedType().Profile(ID);
5012 }
5013
5014 static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T,
5015 ArrayRef<TemplateArgument> Args,
5016 const ASTContext &Context);
5017
5018 static bool classof(const Type *T) {
5019 return T->getTypeClass() == TemplateSpecialization;
5020 }
5021};
5022
5023/// Print a template argument list, including the '<' and '>'
5024/// enclosing the template arguments.
5025void printTemplateArgumentList(raw_ostream &OS,
5026 ArrayRef<TemplateArgument> Args,
5027 const PrintingPolicy &Policy);
5028
5029void printTemplateArgumentList(raw_ostream &OS,
5030 ArrayRef<TemplateArgumentLoc> Args,
5031 const PrintingPolicy &Policy);
5032
5033void printTemplateArgumentList(raw_ostream &OS,
5034 const TemplateArgumentListInfo &Args,
5035 const PrintingPolicy &Policy);
5036
5037/// The injected class name of a C++ class template or class
5038/// template partial specialization. Used to record that a type was
5039/// spelled with a bare identifier rather than as a template-id; the
5040/// equivalent for non-templated classes is just RecordType.
5041///
5042/// Injected class name types are always dependent. Template
5043/// instantiation turns these into RecordTypes.
5044///
5045/// Injected class name types are always canonical. This works
5046/// because it is impossible to compare an injected class name type
5047/// with the corresponding non-injected template type, for the same
5048/// reason that it is impossible to directly compare template
5049/// parameters from different dependent contexts: injected class name
5050/// types can only occur within the scope of a particular templated
5051/// declaration, and within that scope every template specialization
5052/// will canonicalize to the injected class name (when appropriate
5053/// according to the rules of the language).
5054class InjectedClassNameType : public Type {
5055 friend class ASTContext; // ASTContext creates these.
5056 friend class ASTNodeImporter;
5057 friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not
5058 // currently suitable for AST reading, too much
5059 // interdependencies.
5060
5061 CXXRecordDecl *Decl;
5062
5063 /// The template specialization which this type represents.
5064 /// For example, in
5065 /// template <class T> class A { ... };
5066 /// this is A<T>, whereas in
5067 /// template <class X, class Y> class A<B<X,Y> > { ... };
5068 /// this is A<B<X,Y> >.
5069 ///
5070 /// It is always unqualified, always a template specialization type,
5071 /// and always dependent.
5072 QualType InjectedType;
5073
5074 InjectedClassNameType(CXXRecordDecl *D, QualType TST)
5075 : Type(InjectedClassName, QualType(), /*Dependent=*/true,
5076 /*InstantiationDependent=*/true,
5077 /*VariablyModified=*/false,
5078 /*ContainsUnexpandedParameterPack=*/false),
5079 Decl(D), InjectedType(TST) {
5080 assert(isa<TemplateSpecializationType>(TST))((isa<TemplateSpecializationType>(TST)) ? static_cast<
void> (0) : __assert_fail ("isa<TemplateSpecializationType>(TST)"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 5080, __PRETTY_FUNCTION__))
;
5081 assert(!TST.hasQualifiers())((!TST.hasQualifiers()) ? static_cast<void> (0) : __assert_fail
("!TST.hasQualifiers()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 5081, __PRETTY_FUNCTION__))
;
5082 assert(TST->isDependentType())((TST->isDependentType()) ? static_cast<void> (0) : __assert_fail
("TST->isDependentType()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 5082, __PRETTY_FUNCTION__))
;
5083 }
5084
5085public:
5086 QualType getInjectedSpecializationType() const { return InjectedType; }
5087
5088 const TemplateSpecializationType *getInjectedTST() const {
5089 return cast<TemplateSpecializationType>(InjectedType.getTypePtr());
5090 }
5091
5092 TemplateName getTemplateName() const {
5093 return getInjectedTST()->getTemplateName();
5094 }
5095
5096 CXXRecordDecl *getDecl() const;
5097
5098 bool isSugared() const { return false; }
5099 QualType desugar() const { return QualType(this, 0); }
5100
5101 static bool classof(const Type *T) {
5102 return T->getTypeClass() == InjectedClassName;
5103 }
5104};
5105
5106/// The kind of a tag type.
5107enum TagTypeKind {
5108 /// The "struct" keyword.
5109 TTK_Struct,
5110
5111 /// The "__interface" keyword.
5112 TTK_Interface,
5113
5114 /// The "union" keyword.
5115 TTK_Union,
5116
5117 /// The "class" keyword.
5118 TTK_Class,
5119
5120 /// The "enum" keyword.
5121 TTK_Enum
5122};
5123
5124/// The elaboration keyword that precedes a qualified type name or
5125/// introduces an elaborated-type-specifier.
5126enum ElaboratedTypeKeyword {
5127 /// The "struct" keyword introduces the elaborated-type-specifier.
5128 ETK_Struct,
5129
5130 /// The "__interface" keyword introduces the elaborated-type-specifier.
5131 ETK_Interface,
5132
5133 /// The "union" keyword introduces the elaborated-type-specifier.
5134 ETK_Union,
5135
5136 /// The "class" keyword introduces the elaborated-type-specifier.
5137 ETK_Class,
5138
5139 /// The "enum" keyword introduces the elaborated-type-specifier.
5140 ETK_Enum,
5141
5142 /// The "typename" keyword precedes the qualified type name, e.g.,
5143 /// \c typename T::type.
5144 ETK_Typename,
5145
5146 /// No keyword precedes the qualified type name.
5147 ETK_None
5148};
5149
5150/// A helper class for Type nodes having an ElaboratedTypeKeyword.
5151/// The keyword in stored in the free bits of the base class.
5152/// Also provides a few static helpers for converting and printing
5153/// elaborated type keyword and tag type kind enumerations.
5154class TypeWithKeyword : public Type {
5155protected:
5156 TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc,
5157 QualType Canonical, bool Dependent,
5158 bool InstantiationDependent, bool VariablyModified,
5159 bool ContainsUnexpandedParameterPack)
5160 : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified,
5161 ContainsUnexpandedParameterPack) {
5162 TypeWithKeywordBits.Keyword = Keyword;
5163 }
5164
5165public:
5166 ElaboratedTypeKeyword getKeyword() const {
5167 return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword);
5168 }
5169
5170 /// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword.
5171 static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec);
5172
5173 /// Converts a type specifier (DeclSpec::TST) into a tag type kind.
5174 /// It is an error to provide a type specifier which *isn't* a tag kind here.
5175 static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec);
5176
5177 /// Converts a TagTypeKind into an elaborated type keyword.
5178 static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag);
5179
5180 /// Converts an elaborated type keyword into a TagTypeKind.
5181 /// It is an error to provide an elaborated type keyword
5182 /// which *isn't* a tag kind here.
5183 static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword);
5184
5185 static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword);
5186
5187 static StringRef getKeywordName(ElaboratedTypeKeyword Keyword);
5188
5189 static StringRef getTagTypeKindName(TagTypeKind Kind) {
5190 return getKeywordName(getKeywordForTagTypeKind(Kind));
5191 }
5192
5193 class CannotCastToThisType {};
5194 static CannotCastToThisType classof(const Type *);
5195};
5196
5197/// Represents a type that was referred to using an elaborated type
5198/// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type,
5199/// or both.
5200///
5201/// This type is used to keep track of a type name as written in the
5202/// source code, including tag keywords and any nested-name-specifiers.
5203/// The type itself is always "sugar", used to express what was written
5204/// in the source code but containing no additional semantic information.
5205class ElaboratedType final
5206 : public TypeWithKeyword,
5207 public llvm::FoldingSetNode,
5208 private llvm::TrailingObjects<ElaboratedType, TagDecl *> {
5209 friend class ASTContext; // ASTContext creates these
5210 friend TrailingObjects;
5211
5212 /// The nested name specifier containing the qualifier.
5213 NestedNameSpecifier *NNS;
5214
5215 /// The type that this qualified name refers to.
5216 QualType NamedType;
5217
5218 /// The (re)declaration of this tag type owned by this occurrence is stored
5219 /// as a trailing object if there is one. Use getOwnedTagDecl to obtain
5220 /// it, or obtain a null pointer if there is none.
5221
5222 ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS,
5223 QualType NamedType, QualType CanonType, TagDecl *OwnedTagDecl)
5224 : TypeWithKeyword(Keyword, Elaborated, CanonType,
5225 NamedType->isDependentType(),
5226 NamedType->isInstantiationDependentType(),
5227 NamedType->isVariablyModifiedType(),
5228 NamedType->containsUnexpandedParameterPack()),
5229 NNS(NNS), NamedType(NamedType) {
5230 ElaboratedTypeBits.HasOwnedTagDecl = false;
5231 if (OwnedTagDecl) {
5232 ElaboratedTypeBits.HasOwnedTagDecl = true;
5233 *getTrailingObjects<TagDecl *>() = OwnedTagDecl;
5234 }
5235 assert(!(Keyword == ETK_None && NNS == nullptr) &&((!(Keyword == ETK_None && NNS == nullptr) &&
"ElaboratedType cannot have elaborated type keyword " "and name qualifier both null."
) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 5237, __PRETTY_FUNCTION__))
5236 "ElaboratedType cannot have elaborated type keyword "((!(Keyword == ETK_None && NNS == nullptr) &&
"ElaboratedType cannot have elaborated type keyword " "and name qualifier both null."
) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 5237, __PRETTY_FUNCTION__))
5237 "and name qualifier both null.")((!(Keyword == ETK_None && NNS == nullptr) &&
"ElaboratedType cannot have elaborated type keyword " "and name qualifier both null."
) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 5237, __PRETTY_FUNCTION__))
;
5238 }
5239
5240public:
5241 /// Retrieve the qualification on this type.
5242 NestedNameSpecifier *getQualifier() const { return NNS; }
5243
5244 /// Retrieve the type named by the qualified-id.
5245 QualType getNamedType() const { return NamedType; }
5246
5247 /// Remove a single level of sugar.
5248 QualType desugar() const { return getNamedType(); }
5249
5250 /// Returns whether this type directly provides sugar.
5251 bool isSugared() const { return true; }
5252
5253 /// Return the (re)declaration of this type owned by this occurrence of this
5254 /// type, or nullptr if there is none.
5255 TagDecl *getOwnedTagDecl() const {
5256 return ElaboratedTypeBits.HasOwnedTagDecl ? *getTrailingObjects<TagDecl *>()
5257 : nullptr;
5258 }
5259
5260 void Profile(llvm::FoldingSetNodeID &ID) {
5261 Profile(ID, getKeyword(), NNS, NamedType, getOwnedTagDecl());
5262 }
5263
5264 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword,
5265 NestedNameSpecifier *NNS, QualType NamedType,
5266 TagDecl *OwnedTagDecl) {
5267 ID.AddInteger(Keyword);
5268 ID.AddPointer(NNS);
5269 NamedType.Profile(ID);
5270 ID.AddPointer(OwnedTagDecl);
5271 }
5272
5273 static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; }
5274};
5275
5276/// Represents a qualified type name for which the type name is
5277/// dependent.
5278///
5279/// DependentNameType represents a class of dependent types that involve a
5280/// possibly dependent nested-name-specifier (e.g., "T::") followed by a
5281/// name of a type. The DependentNameType may start with a "typename" (for a
5282/// typename-specifier), "class", "struct", "union", or "enum" (for a
5283/// dependent elaborated-type-specifier), or nothing (in contexts where we
5284/// know that we must be referring to a type, e.g., in a base class specifier).
5285/// Typically the nested-name-specifier is dependent, but in MSVC compatibility
5286/// mode, this type is used with non-dependent names to delay name lookup until
5287/// instantiation.
5288class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode {
5289 friend class ASTContext; // ASTContext creates these
5290
5291 /// The nested name specifier containing the qualifier.
5292 NestedNameSpecifier *NNS;
5293
5294 /// The type that this typename specifier refers to.
5295 const IdentifierInfo *Name;
5296
5297 DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS,
5298 const IdentifierInfo *Name, QualType CanonType)
5299 : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true,
5300 /*InstantiationDependent=*/true,
5301 /*VariablyModified=*/false,
5302 NNS->containsUnexpandedParameterPack()),
5303 NNS(NNS), Name(Name) {}
5304
5305public:
5306 /// Retrieve the qualification on this type.
5307 NestedNameSpecifier *getQualifier() const { return NNS; }
5308
5309 /// Retrieve the type named by the typename specifier as an identifier.
5310 ///
5311 /// This routine will return a non-NULL identifier pointer when the
5312 /// form of the original typename was terminated by an identifier,
5313 /// e.g., "typename T::type".
5314 const IdentifierInfo *getIdentifier() const {
5315 return Name;
5316 }
5317
5318 bool isSugared() const { return false; }
5319 QualType desugar() const { return QualType(this, 0); }
5320
5321 void Profile(llvm::FoldingSetNodeID &ID) {
5322 Profile(ID, getKeyword(), NNS, Name);
5323 }
5324
5325 static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword,
5326 NestedNameSpecifier *NNS, const IdentifierInfo *Name) {
5327 ID.AddInteger(Keyword);
5328 ID.AddPointer(NNS);
5329 ID.AddPointer(Name);
5330 }
5331
5332 static bool classof(const Type *T) {
5333 return T->getTypeClass() == DependentName;
5334 }
5335};
5336
5337/// Represents a template specialization type whose template cannot be
5338/// resolved, e.g.
5339/// A<T>::template B<T>
5340class alignas(8) DependentTemplateSpecializationType
5341 : public TypeWithKeyword,
5342 public llvm::FoldingSetNode {
5343 friend class ASTContext; // ASTContext creates these
5344
5345 /// The nested name specifier containing the qualifier.
5346 NestedNameSpecifier *NNS;
5347
5348 /// The identifier of the template.
5349 const IdentifierInfo *Name;
5350
5351 DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword,
5352 NestedNameSpecifier *NNS,
5353 const IdentifierInfo *Name,
5354 ArrayRef<TemplateArgument> Args,
5355 QualType Canon);
5356
5357 const TemplateArgument *getArgBuffer() const {
5358 return reinterpret_cast<const TemplateArgument*>(this+1);
5359 }
5360
5361 TemplateArgument *getArgBuffer() {
5362 return reinterpret_cast<TemplateArgument*>(this+1);
5363 }
5364
5365public:
5366 NestedNameSpecifier *getQualifier() const { return NNS; }
5367 const IdentifierInfo *getIdentifier() const { return Name; }
5368
5369 /// Retrieve the template arguments.
5370 const TemplateArgument *getArgs() const {
5371 return getArgBuffer();
5372 }
5373
5374 /// Retrieve the number of template arguments.
5375 unsigned getNumArgs() const {
5376 return DependentTemplateSpecializationTypeBits.NumArgs;
5377 }
5378
5379 const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h
5380
5381 ArrayRef<TemplateArgument> template_arguments() const {
5382 return {getArgs(), getNumArgs()};
5383 }
5384
5385 using iterator = const TemplateArgument *;
5386
5387 iterator begin() const { return getArgs(); }
5388 iterator end() const; // inline in TemplateBase.h
5389
5390 bool isSugared() const { return false; }
5391 QualType desugar() const { return QualType(this, 0); }
5392
5393 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) {
5394 Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), getNumArgs()});
5395 }
5396
5397 static void Profile(llvm::FoldingSetNodeID &ID,
5398 const ASTContext &Context,
5399 ElaboratedTypeKeyword Keyword,
5400 NestedNameSpecifier *Qualifier,
5401 const IdentifierInfo *Name,
5402 ArrayRef<TemplateArgument> Args);
5403
5404 static bool classof(const Type *T) {
5405 return T->getTypeClass() == DependentTemplateSpecialization;
5406 }
5407};
5408
5409/// Represents a pack expansion of types.
5410///
5411/// Pack expansions are part of C++11 variadic templates. A pack
5412/// expansion contains a pattern, which itself contains one or more
5413/// "unexpanded" parameter packs. When instantiated, a pack expansion
5414/// produces a series of types, each instantiated from the pattern of
5415/// the expansion, where the Ith instantiation of the pattern uses the
5416/// Ith arguments bound to each of the unexpanded parameter packs. The
5417/// pack expansion is considered to "expand" these unexpanded
5418/// parameter packs.
5419///
5420/// \code
5421/// template<typename ...Types> struct tuple;
5422///
5423/// template<typename ...Types>
5424/// struct tuple_of_references {
5425/// typedef tuple<Types&...> type;
5426/// };
5427/// \endcode
5428///
5429/// Here, the pack expansion \c Types&... is represented via a
5430/// PackExpansionType whose pattern is Types&.
5431class PackExpansionType : public Type, public llvm::FoldingSetNode {
5432 friend class ASTContext; // ASTContext creates these
5433
5434 /// The pattern of the pack expansion.
5435 QualType Pattern;
5436
5437 PackExpansionType(QualType Pattern, QualType Canon,
5438 Optional<unsigned> NumExpansions)
5439 : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(),
5440 /*InstantiationDependent=*/true,
5441 /*VariablyModified=*/Pattern->isVariablyModifiedType(),
5442 /*ContainsUnexpandedParameterPack=*/false),
5443 Pattern(Pattern) {
5444 PackExpansionTypeBits.NumExpansions =
5445 NumExpansions ? *NumExpansions + 1 : 0;
5446 }
5447
5448public:
5449 /// Retrieve the pattern of this pack expansion, which is the
5450 /// type that will be repeatedly instantiated when instantiating the
5451 /// pack expansion itself.
5452 QualType getPattern() const { return Pattern; }
5453
5454 /// Retrieve the number of expansions that this pack expansion will
5455 /// generate, if known.
5456 Optional<unsigned> getNumExpansions() const {
5457 if (PackExpansionTypeBits.NumExpansions)
5458 return PackExpansionTypeBits.NumExpansions - 1;
5459 return None;
5460 }
5461
5462 bool isSugared() const { return !Pattern->isDependentType(); }
5463 QualType desugar() const { return isSugared() ? Pattern : QualType(this, 0); }
5464
5465 void Profile(llvm::FoldingSetNodeID &ID) {
5466 Profile(ID, getPattern(), getNumExpansions());
5467 }
5468
5469 static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern,
5470 Optional<unsigned> NumExpansions) {
5471 ID.AddPointer(Pattern.getAsOpaquePtr());
5472 ID.AddBoolean(NumExpansions.hasValue());
5473 if (NumExpansions)
5474 ID.AddInteger(*NumExpansions);
5475 }
5476
5477 static bool classof(const Type *T) {
5478 return T->getTypeClass() == PackExpansion;
5479 }
5480};
5481
5482/// This class wraps the list of protocol qualifiers. For types that can
5483/// take ObjC protocol qualifers, they can subclass this class.
5484template <class T>
5485class ObjCProtocolQualifiers {
5486protected:
5487 ObjCProtocolQualifiers() = default;
5488
5489 ObjCProtocolDecl * const *getProtocolStorage() const {
5490 return const_cast<ObjCProtocolQualifiers*>(this)->getProtocolStorage();
5491 }
5492
5493 ObjCProtocolDecl **getProtocolStorage() {
5494 return static_cast<T*>(this)->getProtocolStorageImpl();
5495 }
5496
5497 void setNumProtocols(unsigned N) {
5498 static_cast<T*>(this)->setNumProtocolsImpl(N);
5499 }
5500
5501 void initialize(ArrayRef<ObjCProtocolDecl *> protocols) {
5502 setNumProtocols(protocols.size());
5503 assert(getNumProtocols() == protocols.size() &&((getNumProtocols() == protocols.size() && "bitfield overflow in protocol count"
) ? static_cast<void> (0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 5504, __PRETTY_FUNCTION__))
5504 "bitfield overflow in protocol count")((getNumProtocols() == protocols.size() && "bitfield overflow in protocol count"
) ? static_cast<void> (0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 5504, __PRETTY_FUNCTION__))
;
5505 if (!protocols.empty())
5506 memcpy(getProtocolStorage(), protocols.data(),
5507 protocols.size() * sizeof(ObjCProtocolDecl*));
5508 }
5509
5510public:
5511 using qual_iterator = ObjCProtocolDecl * const *;
5512 using qual_range = llvm::iterator_range<qual_iterator>;
5513
5514 qual_range quals() const { return qual_range(qual_begin(), qual_end()); }
5515 qual_iterator qual_begin() const { return getProtocolStorage(); }
5516 qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); }
5517
5518 bool qual_empty() const { return getNumProtocols() == 0; }
5519
5520 /// Return the number of qualifying protocols in this type, or 0 if
5521 /// there are none.
5522 unsigned getNumProtocols() const {
5523 return static_cast<const T*>(this)->getNumProtocolsImpl();
5524 }
5525
5526 /// Fetch a protocol by index.
5527 ObjCProtocolDecl *getProtocol(unsigned I) const {
5528 assert(I < getNumProtocols() && "Out-of-range protocol access")((I < getNumProtocols() && "Out-of-range protocol access"
) ? static_cast<void> (0) : __assert_fail ("I < getNumProtocols() && \"Out-of-range protocol access\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 5528, __PRETTY_FUNCTION__))
;
5529 return qual_begin()[I];
5530 }
5531
5532 /// Retrieve all of the protocol qualifiers.
5533 ArrayRef<ObjCProtocolDecl *> getProtocols() const {
5534 return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols());
5535 }
5536};
5537
5538/// Represents a type parameter type in Objective C. It can take
5539/// a list of protocols.
5540class ObjCTypeParamType : public Type,
5541 public ObjCProtocolQualifiers<ObjCTypeParamType>,
5542 public llvm::FoldingSetNode {
5543 friend class ASTContext;
5544 friend class ObjCProtocolQualifiers<ObjCTypeParamType>;
5545
5546 /// The number of protocols stored on this type.
5547 unsigned NumProtocols : 6;
5548
5549 ObjCTypeParamDecl *OTPDecl;
5550
5551 /// The protocols are stored after the ObjCTypeParamType node. In the
5552 /// canonical type, the list of protocols are sorted alphabetically
5553 /// and uniqued.
5554 ObjCProtocolDecl **getProtocolStorageImpl();
5555
5556 /// Return the number of qualifying protocols in this interface type,
5557 /// or 0 if there are none.
5558 unsigned getNumProtocolsImpl() const {
5559 return NumProtocols;
5560 }
5561
5562 void setNumProtocolsImpl(unsigned N) {
5563 NumProtocols = N;
5564 }
5565
5566 ObjCTypeParamType(const ObjCTypeParamDecl *D,
5567 QualType can,
5568 ArrayRef<ObjCProtocolDecl *> protocols);
5569
5570public:
5571 bool isSugared() const { return true; }
5572 QualType desugar() const { return getCanonicalTypeInternal(); }
5573
5574 static bool classof(const Type *T) {
5575 return T->getTypeClass() == ObjCTypeParam;
5576 }
5577
5578 void Profile(llvm::FoldingSetNodeID &ID);
5579 static void Profile(llvm::FoldingSetNodeID &ID,
5580 const ObjCTypeParamDecl *OTPDecl,
5581 ArrayRef<ObjCProtocolDecl *> protocols);
5582
5583 ObjCTypeParamDecl *getDecl() const { return OTPDecl; }
5584};
5585
5586/// Represents a class type in Objective C.
5587///
5588/// Every Objective C type is a combination of a base type, a set of
5589/// type arguments (optional, for parameterized classes) and a list of
5590/// protocols.
5591///
5592/// Given the following declarations:
5593/// \code
5594/// \@class C<T>;
5595/// \@protocol P;
5596/// \endcode
5597///
5598/// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType
5599/// with base C and no protocols.
5600///
5601/// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P].
5602/// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no
5603/// protocol list.
5604/// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*',
5605/// and protocol list [P].
5606///
5607/// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose
5608/// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType
5609/// and no protocols.
5610///
5611/// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType
5612/// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually
5613/// this should get its own sugar class to better represent the source.
5614class ObjCObjectType : public Type,
5615 public ObjCProtocolQualifiers<ObjCObjectType> {
5616 friend class ObjCProtocolQualifiers<ObjCObjectType>;
5617
5618 // ObjCObjectType.NumTypeArgs - the number of type arguments stored
5619 // after the ObjCObjectPointerType node.
5620 // ObjCObjectType.NumProtocols - the number of protocols stored
5621 // after the type arguments of ObjCObjectPointerType node.
5622 //
5623 // These protocols are those written directly on the type. If
5624 // protocol qualifiers ever become additive, the iterators will need
5625 // to get kindof complicated.
5626 //
5627 // In the canonical object type, these are sorted alphabetically
5628 // and uniqued.
5629
5630 /// Either a BuiltinType or an InterfaceType or sugar for either.
5631 QualType BaseType;
5632
5633 /// Cached superclass type.
5634 mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool>
5635 CachedSuperClassType;
5636
5637 QualType *getTypeArgStorage();
5638 const QualType *getTypeArgStorage() const {
5639 return const_cast<ObjCObjectType *>(this)->getTypeArgStorage();
5640 }
5641
5642 ObjCProtocolDecl **getProtocolStorageImpl();
5643 /// Return the number of qualifying protocols in this interface type,
5644 /// or 0 if there are none.
5645 unsigned getNumProtocolsImpl() const {
5646 return ObjCObjectTypeBits.NumProtocols;
5647 }
5648 void setNumProtocolsImpl(unsigned N) {
5649 ObjCObjectTypeBits.NumProtocols = N;
5650 }
5651
5652protected:
5653 enum Nonce_ObjCInterface { Nonce_ObjCInterface };
5654
5655 ObjCObjectType(QualType Canonical, QualType Base,
5656 ArrayRef<QualType> typeArgs,
5657 ArrayRef<ObjCProtocolDecl *> protocols,
5658 bool isKindOf);
5659
5660 ObjCObjectType(enum Nonce_ObjCInterface)
5661 : Type(ObjCInterface, QualType(), false, false, false, false),
5662 BaseType(QualType(this_(), 0)) {
5663 ObjCObjectTypeBits.NumProtocols = 0;
5664 ObjCObjectTypeBits.NumTypeArgs = 0;
5665 ObjCObjectTypeBits.IsKindOf = 0;
5666 }
5667
5668 void computeSuperClassTypeSlow() const;
5669
5670public:
5671 /// Gets the base type of this object type. This is always (possibly
5672 /// sugar for) one of:
5673 /// - the 'id' builtin type (as opposed to the 'id' type visible to the
5674 /// user, which is a typedef for an ObjCObjectPointerType)
5675 /// - the 'Class' builtin type (same caveat)
5676 /// - an ObjCObjectType (currently always an ObjCInterfaceType)
5677 QualType getBaseType() const { return BaseType; }
5678
5679 bool isObjCId() const {
5680 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId);
5681 }
5682
5683 bool isObjCClass() const {
5684 return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass);
5685 }
5686
5687 bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); }
5688 bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); }
5689 bool isObjCUnqualifiedIdOrClass() const {
5690 if (!qual_empty()) return false;
5691 if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>())
5692 return T->getKind() == BuiltinType::ObjCId ||
5693 T->getKind() == BuiltinType::ObjCClass;
5694 return false;
5695 }
5696 bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); }
5697 bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); }
5698
5699 /// Gets the interface declaration for this object type, if the base type
5700 /// really is an interface.
5701 ObjCInterfaceDecl *getInterface() const;
5702
5703 /// Determine whether this object type is "specialized", meaning
5704 /// that it has type arguments.
5705 bool isSpecialized() const;
5706
5707 /// Determine whether this object type was written with type arguments.
5708 bool isSpecializedAsWritten() const {
5709 return ObjCObjectTypeBits.NumTypeArgs > 0;
5710 }
5711
5712 /// Determine whether this object type is "unspecialized", meaning
5713 /// that it has no type arguments.
5714 bool isUnspecialized() const { return !isSpecialized(); }
5715
5716 /// Determine whether this object type is "unspecialized" as
5717 /// written, meaning that it has no type arguments.
5718 bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); }
5719
5720 /// Retrieve the type arguments of this object type (semantically).
5721 ArrayRef<QualType> getTypeArgs() const;
5722
5723 /// Retrieve the type arguments of this object type as they were
5724 /// written.
5725 ArrayRef<QualType> getTypeArgsAsWritten() const {
5726 return llvm::makeArrayRef(getTypeArgStorage(),
5727 ObjCObjectTypeBits.NumTypeArgs);
5728 }
5729
5730 /// Whether this is a "__kindof" type as written.
5731 bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; }
5732
5733 /// Whether this ia a "__kindof" type (semantically).
5734 bool isKindOfType() const;
5735
5736 /// Retrieve the type of the superclass of this object type.
5737 ///
5738 /// This operation substitutes any type arguments into the
5739 /// superclass of the current class type, potentially producing a
5740 /// specialization of the superclass type. Produces a null type if
5741 /// there is no superclass.
5742 QualType getSuperClassType() const {
5743 if (!CachedSuperClassType.getInt())
5744 computeSuperClassTypeSlow();
5745
5746 assert(CachedSuperClassType.getInt() && "Superclass not set?")((CachedSuperClassType.getInt() && "Superclass not set?"
) ? static_cast<void> (0) : __assert_fail ("CachedSuperClassType.getInt() && \"Superclass not set?\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 5746, __PRETTY_FUNCTION__))
;
5747 return QualType(CachedSuperClassType.getPointer(), 0);
5748 }
5749
5750 /// Strip off the Objective-C "kindof" type and (with it) any
5751 /// protocol qualifiers.
5752 QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const;
5753
5754 bool isSugared() const { return false; }
5755 QualType desugar() const { return QualType(this, 0); }
5756
5757 static bool classof(const Type *T) {
5758 return T->getTypeClass() == ObjCObject ||
5759 T->getTypeClass() == ObjCInterface;
5760 }
5761};
5762
5763/// A class providing a concrete implementation
5764/// of ObjCObjectType, so as to not increase the footprint of
5765/// ObjCInterfaceType. Code outside of ASTContext and the core type
5766/// system should not reference this type.
5767class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode {
5768 friend class ASTContext;
5769
5770 // If anyone adds fields here, ObjCObjectType::getProtocolStorage()
5771 // will need to be modified.
5772
5773 ObjCObjectTypeImpl(QualType Canonical, QualType Base,
5774 ArrayRef<QualType> typeArgs,
5775 ArrayRef<ObjCProtocolDecl *> protocols,
5776 bool isKindOf)
5777 : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {}
5778
5779public:
5780 void Profile(llvm::FoldingSetNodeID &ID);
5781 static void Profile(llvm::FoldingSetNodeID &ID,
5782 QualType Base,
5783 ArrayRef<QualType> typeArgs,
5784 ArrayRef<ObjCProtocolDecl *> protocols,
5785 bool isKindOf);
5786};
5787
5788inline QualType *ObjCObjectType::getTypeArgStorage() {
5789 return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1);
5790}
5791
5792inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorageImpl() {
5793 return reinterpret_cast<ObjCProtocolDecl**>(
5794 getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs);
5795}
5796
5797inline ObjCProtocolDecl **ObjCTypeParamType::getProtocolStorageImpl() {
5798 return reinterpret_cast<ObjCProtocolDecl**>(
5799 static_cast<ObjCTypeParamType*>(this)+1);
5800}
5801
5802/// Interfaces are the core concept in Objective-C for object oriented design.
5803/// They basically correspond to C++ classes. There are two kinds of interface
5804/// types: normal interfaces like `NSString`, and qualified interfaces, which
5805/// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`.
5806///
5807/// ObjCInterfaceType guarantees the following properties when considered
5808/// as a subtype of its superclass, ObjCObjectType:
5809/// - There are no protocol qualifiers. To reinforce this, code which
5810/// tries to invoke the protocol methods via an ObjCInterfaceType will
5811/// fail to compile.
5812/// - It is its own base type. That is, if T is an ObjCInterfaceType*,
5813/// T->getBaseType() == QualType(T, 0).
5814class ObjCInterfaceType : public ObjCObjectType {
5815 friend class ASTContext; // ASTContext creates these.
5816 friend class ASTReader;
5817 friend class ObjCInterfaceDecl;
5818
5819 mutable ObjCInterfaceDecl *Decl;
5820
5821 ObjCInterfaceType(const ObjCInterfaceDecl *D)
5822 : ObjCObjectType(Nonce_ObjCInterface),
5823 Decl(const_cast<ObjCInterfaceDecl*>(D)) {}
5824
5825public:
5826 /// Get the declaration of this interface.
5827 ObjCInterfaceDecl *getDecl() const { return Decl; }
5828
5829 bool isSugared() const { return false; }
5830 QualType desugar() const { return QualType(this, 0); }
5831
5832 static bool classof(const Type *T) {
5833 return T->getTypeClass() == ObjCInterface;
5834 }
5835
5836 // Nonsense to "hide" certain members of ObjCObjectType within this
5837 // class. People asking for protocols on an ObjCInterfaceType are
5838 // not going to get what they want: ObjCInterfaceTypes are
5839 // guaranteed to have no protocols.
5840 enum {
5841 qual_iterator,
5842 qual_begin,
5843 qual_end,
5844 getNumProtocols,
5845 getProtocol
5846 };
5847};
5848
5849inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const {
5850 QualType baseType = getBaseType();
5851 while (const auto *ObjT = baseType->getAs<ObjCObjectType>()) {
5852 if (const auto *T = dyn_cast<ObjCInterfaceType>(ObjT))
5853 return T->getDecl();
5854
5855 baseType = ObjT->getBaseType();
5856 }
5857
5858 return nullptr;
5859}
5860
5861/// Represents a pointer to an Objective C object.
5862///
5863/// These are constructed from pointer declarators when the pointee type is
5864/// an ObjCObjectType (or sugar for one). In addition, the 'id' and 'Class'
5865/// types are typedefs for these, and the protocol-qualified types 'id<P>'
5866/// and 'Class<P>' are translated into these.
5867///
5868/// Pointers to pointers to Objective C objects are still PointerTypes;
5869/// only the first level of pointer gets it own type implementation.
5870class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode {
5871 friend class ASTContext; // ASTContext creates these.
5872
5873 QualType PointeeType;
5874
5875 ObjCObjectPointerType(QualType Canonical, QualType Pointee)
5876 : Type(ObjCObjectPointer, Canonical,
5877 Pointee->isDependentType(),
5878 Pointee->isInstantiationDependentType(),
5879 Pointee->isVariablyModifiedType(),
5880 Pointee->containsUnexpandedParameterPack()),
5881 PointeeType(Pointee) {}
5882
5883public:
5884 /// Gets the type pointed to by this ObjC pointer.
5885 /// The result will always be an ObjCObjectType or sugar thereof.
5886 QualType getPointeeType() const { return PointeeType; }
5887
5888 /// Gets the type pointed to by this ObjC pointer. Always returns non-null.
5889 ///
5890 /// This method is equivalent to getPointeeType() except that
5891 /// it discards any typedefs (or other sugar) between this
5892 /// type and the "outermost" object type. So for:
5893 /// \code
5894 /// \@class A; \@protocol P; \@protocol Q;
5895 /// typedef A<P> AP;
5896 /// typedef A A1;
5897 /// typedef A1<P> A1P;
5898 /// typedef A1P<Q> A1PQ;
5899 /// \endcode
5900 /// For 'A*', getObjectType() will return 'A'.
5901 /// For 'A<P>*', getObjectType() will return 'A<P>'.
5902 /// For 'AP*', getObjectType() will return 'A<P>'.
5903 /// For 'A1*', getObjectType() will return 'A'.
5904 /// For 'A1<P>*', getObjectType() will return 'A1<P>'.
5905 /// For 'A1P*', getObjectType() will return 'A1<P>'.
5906 /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because
5907 /// adding protocols to a protocol-qualified base discards the
5908 /// old qualifiers (for now). But if it didn't, getObjectType()
5909 /// would return 'A1P<Q>' (and we'd have to make iterating over
5910 /// qualifiers more complicated).
5911 const ObjCObjectType *getObjectType() const {
5912 return PointeeType->castAs<ObjCObjectType>();
5913 }
5914
5915 /// If this pointer points to an Objective C
5916 /// \@interface type, gets the type for that interface. Any protocol
5917 /// qualifiers on the interface are ignored.
5918 ///
5919 /// \return null if the base type for this pointer is 'id' or 'Class'
5920 const ObjCInterfaceType *getInterfaceType() const;
5921
5922 /// If this pointer points to an Objective \@interface
5923 /// type, gets the declaration for that interface.
5924 ///
5925 /// \return null if the base type for this pointer is 'id' or 'Class'
5926 ObjCInterfaceDecl *getInterfaceDecl() const {
5927 return getObjectType()->getInterface();
5928 }
5929
5930 /// True if this is equivalent to the 'id' type, i.e. if
5931 /// its object type is the primitive 'id' type with no protocols.
5932 bool isObjCIdType() const {
5933 return getObjectType()->isObjCUnqualifiedId();
5934 }
5935
5936 /// True if this is equivalent to the 'Class' type,
5937 /// i.e. if its object tive is the primitive 'Class' type with no protocols.
5938 bool isObjCClassType() const {
5939 return getObjectType()->isObjCUnqualifiedClass();
5940 }
5941
5942 /// True if this is equivalent to the 'id' or 'Class' type,
5943 bool isObjCIdOrClassType() const {
5944 return getObjectType()->isObjCUnqualifiedIdOrClass();
5945 }
5946
5947 /// True if this is equivalent to 'id<P>' for some non-empty set of
5948 /// protocols.
5949 bool isObjCQualifiedIdType() const {
5950 return getObjectType()->isObjCQualifiedId();
5951 }
5952
5953 /// True if this is equivalent to 'Class<P>' for some non-empty set of
5954 /// protocols.
5955 bool isObjCQualifiedClassType() const {
5956 return getObjectType()->isObjCQualifiedClass();
5957 }
5958
5959 /// Whether this is a "__kindof" type.
5960 bool isKindOfType() const { return getObjectType()->isKindOfType(); }
5961
5962 /// Whether this type is specialized, meaning that it has type arguments.
5963 bool isSpecialized() const { return getObjectType()->isSpecialized(); }
5964
5965 /// Whether this type is specialized, meaning that it has type arguments.
5966 bool isSpecializedAsWritten() const {
5967 return getObjectType()->isSpecializedAsWritten();
5968 }
5969
5970 /// Whether this type is unspecialized, meaning that is has no type arguments.
5971 bool isUnspecialized() const { return getObjectType()->isUnspecialized(); }
5972
5973 /// Determine whether this object type is "unspecialized" as
5974 /// written, meaning that it has no type arguments.
5975 bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); }
5976
5977 /// Retrieve the type arguments for this type.
5978 ArrayRef<QualType> getTypeArgs() const {
5979 return getObjectType()->getTypeArgs();
5980 }
5981
5982 /// Retrieve the type arguments for this type.
5983 ArrayRef<QualType> getTypeArgsAsWritten() const {
5984 return getObjectType()->getTypeArgsAsWritten();
5985 }
5986
5987 /// An iterator over the qualifiers on the object type. Provided
5988 /// for convenience. This will always iterate over the full set of
5989 /// protocols on a type, not just those provided directly.
5990 using qual_iterator = ObjCObjectType::qual_iterator;
5991 using qual_range = llvm::iterator_range<qual_iterator>;
5992
5993 qual_range quals() const { return qual_range(qual_begin(), qual_end()); }
5994
5995 qual_iterator qual_begin() const {
5996 return getObjectType()->qual_begin();
5997 }
5998
5999 qual_iterator qual_end() const {
6000 return getObjectType()->qual_end();
6001 }
6002
6003 bool qual_empty() const { return getObjectType()->qual_empty(); }
6004
6005 /// Return the number of qualifying protocols on the object type.
6006 unsigned getNumProtocols() const {
6007 return getObjectType()->getNumProtocols();
6008 }
6009
6010 /// Retrieve a qualifying protocol by index on the object type.
6011 ObjCProtocolDecl *getProtocol(unsigned I) const {
6012 return getObjectType()->getProtocol(I);
6013 }
6014
6015 bool isSugared() const { return false; }
6016 QualType desugar() const { return QualType(this, 0); }
6017
6018 /// Retrieve the type of the superclass of this object pointer type.
6019 ///
6020 /// This operation substitutes any type arguments into the
6021 /// superclass of the current class type, potentially producing a
6022 /// pointer to a specialization of the superclass type. Produces a
6023 /// null type if there is no superclass.
6024 QualType getSuperClassType() const;
6025
6026 /// Strip off the Objective-C "kindof" type and (with it) any
6027 /// protocol qualifiers.
6028 const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals(
6029 const ASTContext &ctx) const;
6030
6031 void Profile(llvm::FoldingSetNodeID &ID) {
6032 Profile(ID, getPointeeType());
6033 }
6034
6035 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
6036 ID.AddPointer(T.getAsOpaquePtr());
6037 }
6038
6039 static bool classof(const Type *T) {
6040 return T->getTypeClass() == ObjCObjectPointer;
6041 }
6042};
6043
6044class AtomicType : public Type, public llvm::FoldingSetNode {
6045 friend class ASTContext; // ASTContext creates these.
6046
6047 QualType ValueType;
6048
6049 AtomicType(QualType ValTy, QualType Canonical)
6050 : Type(Atomic, Canonical, ValTy->isDependentType(),
6051 ValTy->isInstantiationDependentType(),
6052 ValTy->isVariablyModifiedType(),
6053 ValTy->containsUnexpandedParameterPack()),
6054 ValueType(ValTy) {}
6055
6056public:
6057 /// Gets the type contained by this atomic type, i.e.
6058 /// the type returned by performing an atomic load of this atomic type.
6059 QualType getValueType() const { return ValueType; }
6060
6061 bool isSugared() const { return false; }
6062 QualType desugar() const { return QualType(this, 0); }
6063
6064 void Profile(llvm::FoldingSetNodeID &ID) {
6065 Profile(ID, getValueType());
6066 }
6067
6068 static void Profile(llvm::FoldingSetNodeID &ID, QualType T) {
6069 ID.AddPointer(T.getAsOpaquePtr());
6070 }
6071
6072 static bool classof(const Type *T) {
6073 return T->getTypeClass() == Atomic;
6074 }
6075};
6076
6077/// PipeType - OpenCL20.
6078class PipeType : public Type, public llvm::FoldingSetNode {
6079 friend class ASTContext; // ASTContext creates these.
6080
6081 QualType ElementType;
6082 bool isRead;
6083
6084 PipeType(QualType elemType, QualType CanonicalPtr, bool isRead)
6085 : Type(Pipe, CanonicalPtr, elemType->isDependentType(),
6086 elemType->isInstantiationDependentType(),
6087 elemType->isVariablyModifiedType(),
6088 elemType->containsUnexpandedParameterPack()),
6089 ElementType(elemType), isRead(isRead) {}
6090
6091public:
6092 QualType getElementType() const { return ElementType; }
6093
6094 bool isSugared() const { return false; }
6095
6096 QualType desugar() const { return QualType(this, 0); }
6097
6098 void Profile(llvm::FoldingSetNodeID &ID) {
6099 Profile(ID, getElementType(), isReadOnly());
6100 }
6101
6102 static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead) {
6103 ID.AddPointer(T.getAsOpaquePtr());
6104 ID.AddBoolean(isRead);
6105 }
6106
6107 static bool classof(const Type *T) {
6108 return T->getTypeClass() == Pipe;
6109 }
6110
6111 bool isReadOnly() const { return isRead; }
6112};
6113
6114/// A qualifier set is used to build a set of qualifiers.
6115class QualifierCollector : public Qualifiers {
6116public:
6117 QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {}
6118
6119 /// Collect any qualifiers on the given type and return an
6120 /// unqualified type. The qualifiers are assumed to be consistent
6121 /// with those already in the type.
6122 const Type *strip(QualType type) {
6123 addFastQualifiers(type.getLocalFastQualifiers());
6124 if (!type.hasLocalNonFastQualifiers())
6125 return type.getTypePtrUnsafe();
6126
6127 const ExtQuals *extQuals = type.getExtQualsUnsafe();
6128 addConsistentQualifiers(extQuals->getQualifiers());
6129 return extQuals->getBaseType();
6130 }
6131
6132 /// Apply the collected qualifiers to the given type.
6133 QualType apply(const ASTContext &Context, QualType QT) const;
6134
6135 /// Apply the collected qualifiers to the given type.
6136 QualType apply(const ASTContext &Context, const Type* T) const;
6137};
6138
6139// Inline function definitions.
6140
6141inline SplitQualType SplitQualType::getSingleStepDesugaredType() const {
6142 SplitQualType desugar =
6143 Ty->getLocallyUnqualifiedSingleStepDesugaredType().split();
6144 desugar.Quals.addConsistentQualifiers(Quals);
6145 return desugar;
6146}
6147
6148inline const Type *QualType::getTypePtr() const {
6149 return getCommonPtr()->BaseType;
6150}
6151
6152inline const Type *QualType::getTypePtrOrNull() const {
6153 return (isNull() ? nullptr : getCommonPtr()->BaseType);
6154}
6155
6156inline SplitQualType QualType::split() const {
6157 if (!hasLocalNonFastQualifiers())
6158 return SplitQualType(getTypePtrUnsafe(),
6159 Qualifiers::fromFastMask(getLocalFastQualifiers()));
6160
6161 const ExtQuals *eq = getExtQualsUnsafe();
6162 Qualifiers qs = eq->getQualifiers();
6163 qs.addFastQualifiers(getLocalFastQualifiers());
6164 return SplitQualType(eq->getBaseType(), qs);
6165}
6166
6167inline Qualifiers QualType::getLocalQualifiers() const {
6168 Qualifiers Quals;
6169 if (hasLocalNonFastQualifiers())
6170 Quals = getExtQualsUnsafe()->getQualifiers();
6171 Quals.addFastQualifiers(getLocalFastQualifiers());
6172 return Quals;
6173}
6174
6175inline Qualifiers QualType::getQualifiers() const {
6176 Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers();
6177 quals.addFastQualifiers(getLocalFastQualifiers());
6178 return quals;
6179}
6180
6181inline unsigned QualType::getCVRQualifiers() const {
6182 unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers();
6183 cvr |= getLocalCVRQualifiers();
6184 return cvr;
6185}
6186
6187inline QualType QualType::getCanonicalType() const {
6188 QualType canon = getCommonPtr()->CanonicalType;
6189 return canon.withFastQualifiers(getLocalFastQualifiers());
6190}
6191
6192inline bool QualType::isCanonical() const {
6193 return getTypePtr()->isCanonicalUnqualified();
6194}
6195
6196inline bool QualType::isCanonicalAsParam() const {
6197 if (!isCanonical()) return false;
6198 if (hasLocalQualifiers()) return false;
6199
6200 const Type *T = getTypePtr();
6201 if (T->isVariablyModifiedType() && T->hasSizedVLAType())
6202 return false;
6203
6204 return !isa<FunctionType>(T) && !isa<ArrayType>(T);
6205}
6206
6207inline bool QualType::isConstQualified() const {
6208 return isLocalConstQualified() ||
6209 getCommonPtr()->CanonicalType.isLocalConstQualified();
6210}
6211
6212inline bool QualType::isRestrictQualified() const {
6213 return isLocalRestrictQualified() ||
6214 getCommonPtr()->CanonicalType.isLocalRestrictQualified();
6215}
6216
6217
6218inline bool QualType::isVolatileQualified() const {
6219 return isLocalVolatileQualified() ||
6220 getCommonPtr()->CanonicalType.isLocalVolatileQualified();
6221}
6222
6223inline bool QualType::hasQualifiers() const {
6224 return hasLocalQualifiers() ||
6225 getCommonPtr()->CanonicalType.hasLocalQualifiers();
6226}
6227
6228inline QualType QualType::getUnqualifiedType() const {
6229 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers())
6230 return QualType(getTypePtr(), 0);
6231
6232 return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0);
6233}
6234
6235inline SplitQualType QualType::getSplitUnqualifiedType() const {
6236 if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers())
6237 return split();
6238
6239 return getSplitUnqualifiedTypeImpl(*this);
6240}
6241
6242inline void QualType::removeLocalConst() {
6243 removeLocalFastQualifiers(Qualifiers::Const);
6244}
6245
6246inline void QualType::removeLocalRestrict() {
6247 removeLocalFastQualifiers(Qualifiers::Restrict);
6248}
6249
6250inline void QualType::removeLocalVolatile() {
6251 removeLocalFastQualifiers(Qualifiers::Volatile);
6252}
6253
6254inline void QualType::removeLocalCVRQualifiers(unsigned Mask) {
6255 assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits")((!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits"
) ? static_cast<void> (0) : __assert_fail ("!(Mask & ~Qualifiers::CVRMask) && \"mask has non-CVR bits\""
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 6255, __PRETTY_FUNCTION__))
;
6256 static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask,
6257 "Fast bits differ from CVR bits!");
6258
6259 // Fast path: we don't need to touch the slow qualifiers.
6260 removeLocalFastQualifiers(Mask);
6261}
6262
6263/// Return the address space of this type.
6264inline LangAS QualType::getAddressSpace() const {
6265 return getQualifiers().getAddressSpace();
6266}
6267
6268/// Return the gc attribute of this type.
6269inline Qualifiers::GC QualType::getObjCGCAttr() const {
6270 return getQualifiers().getObjCGCAttr();
6271}
6272
6273inline bool QualType::hasNonTrivialToPrimitiveDefaultInitializeCUnion() const {
6274 if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
6275 return hasNonTrivialToPrimitiveDefaultInitializeCUnion(RD);
6276 return false;
6277}
6278
6279inline bool QualType::hasNonTrivialToPrimitiveDestructCUnion() const {
6280 if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
6281 return hasNonTrivialToPrimitiveDestructCUnion(RD);
6282 return false;
6283}
6284
6285inline bool QualType::hasNonTrivialToPrimitiveCopyCUnion() const {
6286 if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl())
6287 return hasNonTrivialToPrimitiveCopyCUnion(RD);
6288 return false;
6289}
6290
6291inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) {
6292 if (const auto *PT = t.getAs<PointerType>()) {
6293 if (const auto *FT = PT->getPointeeType()->getAs<FunctionType>())
6294 return FT->getExtInfo();
6295 } else if (const auto *FT = t.getAs<FunctionType>())
6296 return FT->getExtInfo();
6297
6298 return FunctionType::ExtInfo();
6299}
6300
6301inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) {
6302 return getFunctionExtInfo(*t);
6303}
6304
6305/// Determine whether this type is more
6306/// qualified than the Other type. For example, "const volatile int"
6307/// is more qualified than "const int", "volatile int", and
6308/// "int". However, it is not more qualified than "const volatile
6309/// int".
6310inline bool QualType::isMoreQualifiedThan(QualType other) const {
6311 Qualifiers MyQuals = getQualifiers();
6312 Qualifiers OtherQuals = other.getQualifiers();
6313 return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals));
6314}
6315
6316/// Determine whether this type is at last
6317/// as qualified as the Other type. For example, "const volatile
6318/// int" is at least as qualified as "const int", "volatile int",
6319/// "int", and "const volatile int".
6320inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const {
6321 Qualifiers OtherQuals = other.getQualifiers();
6322
6323 // Ignore __unaligned qualifier if this type is a void.
6324 if (getUnqualifiedType()->isVoidType())
6325 OtherQuals.removeUnaligned();
6326
6327 return getQualifiers().compatiblyIncludes(OtherQuals);
6328}
6329
6330/// If Type is a reference type (e.g., const
6331/// int&), returns the type that the reference refers to ("const
6332/// int"). Otherwise, returns the type itself. This routine is used
6333/// throughout Sema to implement C++ 5p6:
6334///
6335/// If an expression initially has the type "reference to T" (8.3.2,
6336/// 8.5.3), the type is adjusted to "T" prior to any further
6337/// analysis, the expression designates the object or function
6338/// denoted by the reference, and the expression is an lvalue.
6339inline QualType QualType::getNonReferenceType() const {
6340 if (const auto *RefType = (*this)->getAs<ReferenceType>())
6341 return RefType->getPointeeType();
6342 else
6343 return *this;
6344}
6345
6346inline bool QualType::isCForbiddenLValueType() const {
6347 return ((getTypePtr()->isVoidType() && !hasQualifiers()) ||
6348 getTypePtr()->isFunctionType());
6349}
6350
6351/// Tests whether the type is categorized as a fundamental type.
6352///
6353/// \returns True for types specified in C++0x [basic.fundamental].
6354inline bool Type::isFundamentalType() const {
6355 return isVoidType() ||
6356 isNullPtrType() ||
6357 // FIXME: It's really annoying that we don't have an
6358 // 'isArithmeticType()' which agrees with the standard definition.
6359 (isArithmeticType() && !isEnumeralType());
6360}
6361
6362/// Tests whether the type is categorized as a compound type.
6363///
6364/// \returns True for types specified in C++0x [basic.compound].
6365inline bool Type::isCompoundType() const {
6366 // C++0x [basic.compound]p1:
6367 // Compound types can be constructed in the following ways:
6368 // -- arrays of objects of a given type [...];
6369 return isArrayType() ||
6370 // -- functions, which have parameters of given types [...];
6371 isFunctionType() ||
6372 // -- pointers to void or objects or functions [...];
6373 isPointerType() ||
6374 // -- references to objects or functions of a given type. [...]
6375 isReferenceType() ||
6376 // -- classes containing a sequence of objects of various types, [...];
6377 isRecordType() ||
6378 // -- unions, which are classes capable of containing objects of different
6379 // types at different times;
6380 isUnionType() ||
6381 // -- enumerations, which comprise a set of named constant values. [...];
6382 isEnumeralType() ||
6383 // -- pointers to non-static class members, [...].
6384 isMemberPointerType();
6385}
6386
6387inline bool Type::isFunctionType() const {
6388 return isa<FunctionType>(CanonicalType);
6389}
6390
6391inline bool Type::isPointerType() const {
6392 return isa<PointerType>(CanonicalType);
6393}
6394
6395inline bool Type::isAnyPointerType() const {
6396 return isPointerType() || isObjCObjectPointerType();
6397}
6398
6399inline bool Type::isBlockPointerType() const {
6400 return isa<BlockPointerType>(CanonicalType);
6401}
6402
6403inline bool Type::isReferenceType() const {
6404 return isa<ReferenceType>(CanonicalType);
6405}
6406
6407inline bool Type::isLValueReferenceType() const {
6408 return isa<LValueReferenceType>(CanonicalType);
6409}
6410
6411inline bool Type::isRValueReferenceType() const {
6412 return isa<RValueReferenceType>(CanonicalType);
6413}
6414
6415inline bool Type::isFunctionPointerType() const {
6416 if (const auto *T = getAs<PointerType>())
6417 return T->getPointeeType()->isFunctionType();
6418 else
6419 return false;
6420}
6421
6422inline bool Type::isFunctionReferenceType() const {
6423 if (const auto *T = getAs<ReferenceType>())
6424 return T->getPointeeType()->isFunctionType();
6425 else
6426 return false;
6427}
6428
6429inline bool Type::isMemberPointerType() const {
6430 return isa<MemberPointerType>(CanonicalType);
6431}
6432
6433inline bool Type::isMemberFunctionPointerType() const {
6434 if (const auto *T = getAs<MemberPointerType>())
6435 return T->isMemberFunctionPointer();
6436 else
6437 return false;
6438}
6439
6440inline bool Type::isMemberDataPointerType() const {
6441 if (const auto *T = getAs<MemberPointerType>())
6442 return T->isMemberDataPointer();
6443 else
6444 return false;
6445}
6446
6447inline bool Type::isArrayType() const {
6448 return isa<ArrayType>(CanonicalType);
6449}
6450
6451inline bool Type::isConstantArrayType() const {
6452 return isa<ConstantArrayType>(CanonicalType);
6453}
6454
6455inline bool Type::isIncompleteArrayType() const {
6456 return isa<IncompleteArrayType>(CanonicalType);
6457}
6458
6459inline bool Type::isVariableArrayType() const {
6460 return isa<VariableArrayType>(CanonicalType);
6461}
6462
6463inline bool Type::isDependentSizedArrayType() const {
6464 return isa<DependentSizedArrayType>(CanonicalType);
6465}
6466
6467inline bool Type::isBuiltinType() const {
6468 return isa<BuiltinType>(CanonicalType);
6469}
6470
6471inline bool Type::isRecordType() const {
6472 return isa<RecordType>(CanonicalType);
35
Assuming field 'CanonicalType' is not a 'RecordType'
36
Returning zero, which participates in a condition later
6473}
6474
6475inline bool Type::isEnumeralType() const {
6476 return isa<EnumType>(CanonicalType);
40
Assuming field 'CanonicalType' is a 'EnumType'
41
Returning the value 1, which participates in a condition later
6477}
6478
6479inline bool Type::isAnyComplexType() const {
6480 return isa<ComplexType>(CanonicalType);
6481}
6482
6483inline bool Type::isVectorType() const {
6484 return isa<VectorType>(CanonicalType);
6485}
6486
6487inline bool Type::isExtVectorType() const {
6488 return isa<ExtVectorType>(CanonicalType);
6489}
6490
6491inline bool Type::isDependentAddressSpaceType() const {
6492 return isa<DependentAddressSpaceType>(CanonicalType);
6493}
6494
6495inline bool Type::isObjCObjectPointerType() const {
6496 return isa<ObjCObjectPointerType>(CanonicalType);
6497}
6498
6499inline bool Type::isObjCObjectType() const {
6500 return isa<ObjCObjectType>(CanonicalType);
6501}
6502
6503inline bool Type::isObjCObjectOrInterfaceType() const {
6504 return isa<ObjCInterfaceType>(CanonicalType) ||
6505 isa<ObjCObjectType>(CanonicalType);
6506}
6507
6508inline bool Type::isAtomicType() const {
6509 return isa<AtomicType>(CanonicalType);
6510}
6511
6512inline bool Type::isObjCQualifiedIdType() const {
6513 if (const auto *OPT = getAs<ObjCObjectPointerType>())
6514 return OPT->isObjCQualifiedIdType();
6515 return false;
6516}
6517
6518inline bool Type::isObjCQualifiedClassType() const {
6519 if (const auto *OPT = getAs<ObjCObjectPointerType>())
6520 return OPT->isObjCQualifiedClassType();
6521 return false;
6522}
6523
6524inline bool Type::isObjCIdType() const {
6525 if (const auto *OPT = getAs<ObjCObjectPointerType>())
6526 return OPT->isObjCIdType();
6527 return false;
6528}
6529
6530inline bool Type::isObjCClassType() const {
6531 if (const auto *OPT = getAs<ObjCObjectPointerType>())
6532 return OPT->isObjCClassType();
6533 return false;
6534}
6535
6536inline bool Type::isObjCSelType() const {
6537 if (const auto *OPT = getAs<PointerType>())
6538 return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel);
6539 return false;
6540}
6541
6542inline bool Type::isObjCBuiltinType() const {
6543 return isObjCIdType() || isObjCClassType() || isObjCSelType();
6544}
6545
6546inline bool Type::isDecltypeType() const {
6547 return isa<DecltypeType>(this);
6548}
6549
6550#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
6551 inline bool Type::is##Id##Type() const { \
6552 return isSpecificBuiltinType(BuiltinType::Id); \
6553 }
6554#include "clang/Basic/OpenCLImageTypes.def"
6555
6556inline bool Type::isSamplerT() const {
6557 return isSpecificBuiltinType(BuiltinType::OCLSampler);
6558}
6559
6560inline bool Type::isEventT() const {
6561 return isSpecificBuiltinType(BuiltinType::OCLEvent);
6562}
6563
6564inline bool Type::isClkEventT() const {
6565 return isSpecificBuiltinType(BuiltinType::OCLClkEvent);
6566}
6567
6568inline bool Type::isQueueT() const {
6569 return isSpecificBuiltinType(BuiltinType::OCLQueue);
6570}
6571
6572inline bool Type::isReserveIDT() const {
6573 return isSpecificBuiltinType(BuiltinType::OCLReserveID);
6574}
6575
6576inline bool Type::isImageType() const {
6577#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() ||
6578 return
6579#include "clang/Basic/OpenCLImageTypes.def"
6580 false; // end boolean or operation
6581}
6582
6583inline bool Type::isPipeType() const {
6584 return isa<PipeType>(CanonicalType);
6585}
6586
6587#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
6588 inline bool Type::is##Id##Type() const { \
6589 return isSpecificBuiltinType(BuiltinType::Id); \
6590 }
6591#include "clang/Basic/OpenCLExtensionTypes.def"
6592
6593inline bool Type::isOCLIntelSubgroupAVCType() const {
6594#define INTEL_SUBGROUP_AVC_TYPE(ExtType, Id) \
6595 isOCLIntelSubgroupAVC##Id##Type() ||
6596 return
6597#include "clang/Basic/OpenCLExtensionTypes.def"
6598 false; // end of boolean or operation
6599}
6600
6601inline bool Type::isOCLExtOpaqueType() const {
6602#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) is##Id##Type() ||
6603 return
6604#include "clang/Basic/OpenCLExtensionTypes.def"
6605 false; // end of boolean or operation
6606}
6607
6608inline bool Type::isOpenCLSpecificType() const {
6609 return isSamplerT() || isEventT() || isImageType() || isClkEventT() ||
6610 isQueueT() || isReserveIDT() || isPipeType() || isOCLExtOpaqueType();
6611}
6612
6613inline bool Type::isTemplateTypeParmType() const {
6614 return isa<TemplateTypeParmType>(CanonicalType);
6615}
6616
6617inline bool Type::isSpecificBuiltinType(unsigned K) const {
6618 if (const BuiltinType *BT = getAs<BuiltinType>())
6619 if (BT->getKind() == (BuiltinType::Kind) K)
6620 return true;
6621 return false;
6622}
6623
6624inline bool Type::isPlaceholderType() const {
6625 if (const auto *BT = dyn_cast<BuiltinType>(this))
6626 return BT->isPlaceholderType();
6627 return false;
6628}
6629
6630inline const BuiltinType *Type::getAsPlaceholderType() const {
6631 if (const auto *BT = dyn_cast<BuiltinType>(this))
6632 if (BT->isPlaceholderType())
6633 return BT;
6634 return nullptr;
6635}
6636
6637inline bool Type::isSpecificPlaceholderType(unsigned K) const {
6638 assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K))((BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)) ?
static_cast<void> (0) : __assert_fail ("BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)"
, "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 6638, __PRETTY_FUNCTION__))
;
6639 if (const auto *BT = dyn_cast<BuiltinType>(this))
6640 return (BT->getKind() == (BuiltinType::Kind) K);
6641 return false;
6642}
6643
6644inline bool Type::isNonOverloadPlaceholderType() const {
6645 if (const auto *BT = dyn_cast<BuiltinType>(this))
6646 return BT->isNonOverloadPlaceholderType();
6647 return false;
6648}
6649
6650inline bool Type::isVoidType() const {
6651 if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6652 return BT->getKind() == BuiltinType::Void;
6653 return false;
6654}
6655
6656inline bool Type::isHalfType() const {
6657 if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6658 return BT->getKind() == BuiltinType::Half;
6659 // FIXME: Should we allow complex __fp16? Probably not.
6660 return false;
6661}
6662
6663inline bool Type::isFloat16Type() const {
6664 if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6665 return BT->getKind() == BuiltinType::Float16;
6666 return false;
6667}
6668
6669inline bool Type::isFloat128Type() const {
6670 if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6671 return BT->getKind() == BuiltinType::Float128;
6672 return false;
6673}
6674
6675inline bool Type::isNullPtrType() const {
6676 if (const auto *BT = getAs<BuiltinType>())
6677 return BT->getKind() == BuiltinType::NullPtr;
6678 return false;
6679}
6680
6681bool IsEnumDeclComplete(EnumDecl *);
6682bool IsEnumDeclScoped(EnumDecl *);
6683
6684inline bool Type::isIntegerType() const {
6685 if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6686 return BT->getKind() >= BuiltinType::Bool &&
6687 BT->getKind() <= BuiltinType::Int128;
6688 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
6689 // Incomplete enum types are not treated as integer types.
6690 // FIXME: In C++, enum types are never integer types.
6691 return IsEnumDeclComplete(ET->getDecl()) &&
6692 !IsEnumDeclScoped(ET->getDecl());
6693 }
6694 return false;
6695}
6696
6697inline bool Type::isFixedPointType() const {
6698 if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
6699 return BT->getKind() >= BuiltinType::ShortAccum &&
6700 BT->getKind() <= BuiltinType::SatULongFract;
6701 }
6702 return false;
6703}
6704
6705inline bool Type::isFixedPointOrIntegerType() const {
6706 return isFixedPointType() || isIntegerType();
6707}
6708
6709inline bool Type::isSaturatedFixedPointType() const {
6710 if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
6711 return BT->getKind() >= BuiltinType::SatShortAccum &&
6712 BT->getKind() <= BuiltinType::SatULongFract;
6713 }
6714 return false;
6715}
6716
6717inline bool Type::isUnsaturatedFixedPointType() const {
6718 return isFixedPointType() && !isSaturatedFixedPointType();
6719}
6720
6721inline bool Type::isSignedFixedPointType() const {
6722 if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) {
6723 return ((BT->getKind() >= BuiltinType::ShortAccum &&
6724 BT->getKind() <= BuiltinType::LongAccum) ||
6725 (BT->getKind() >= BuiltinType::ShortFract &&
6726 BT->getKind() <= BuiltinType::LongFract) ||
6727 (BT->getKind() >= BuiltinType::SatShortAccum &&
6728 BT->getKind() <= BuiltinType::SatLongAccum) ||
6729 (BT->getKind() >= BuiltinType::SatShortFract &&
6730 BT->getKind() <= BuiltinType::SatLongFract));
6731 }
6732 return false;
6733}
6734
6735inline bool Type::isUnsignedFixedPointType() const {
6736 return isFixedPointType() && !isSignedFixedPointType();
6737}
6738
6739inline bool Type::isScalarType() const {
6740 if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6741 return BT->getKind() > BuiltinType::Void &&
6742 BT->getKind() <= BuiltinType::NullPtr;
6743 if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
6744 // Enums are scalar types, but only if they are defined. Incomplete enums
6745 // are not treated as scalar types.
6746 return IsEnumDeclComplete(ET->getDecl());
6747 return isa<PointerType>(CanonicalType) ||
6748 isa<BlockPointerType>(CanonicalType) ||
6749 isa<MemberPointerType>(CanonicalType) ||
6750 isa<ComplexType>(CanonicalType) ||
6751 isa<ObjCObjectPointerType>(CanonicalType);
6752}
6753
6754inline bool Type::isIntegralOrEnumerationType() const {
6755 if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6756 return BT->getKind() >= BuiltinType::Bool &&
6757 BT->getKind() <= BuiltinType::Int128;
6758
6759 // Check for a complete enum type; incomplete enum types are not properly an
6760 // enumeration type in the sense required here.
6761 if (const auto *ET = dyn_cast<EnumType>(CanonicalType))
6762 return IsEnumDeclComplete(ET->getDecl());
6763
6764 return false;
6765}
6766
6767inline bool Type::isBooleanType() const {
6768 if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType))
6769 return BT->getKind() == BuiltinType::Bool;
6770 return false;
6771}
6772
6773inline bool Type::isUndeducedType() const {
6774 auto *DT = getContainedDeducedType();
6775 return DT && !DT->isDeduced();
6776}
6777
6778/// Determines whether this is a type for which one can define
6779/// an overloaded operator.
6780inline bool Type::isOverloadableType() const {
6781 return isDependentType() || isRecordType() || isEnumeralType();
6782}
6783
6784/// Determines whether this type can decay to a pointer type.
6785inline bool Type::canDecayToPointerType() const {
6786 return isFunctionType() || isArrayType();
6787}
6788
6789inline bool Type::hasPointerRepresentation() const {
6790 return (isPointerType() || isReferenceType() || isBlockPointerType() ||
6791 isObjCObjectPointerType() || isNullPtrType());
6792}
6793
6794inline bool Type::hasObjCPointerRepresentation() const {
6795 return isObjCObjectPointerType();
6796}
6797
6798inline const Type *Type::getBaseElementTypeUnsafe() const {
6799 const Type *type = this;
6800 while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe())
6801 type = arrayType->getElementType().getTypePtr();
6802 return type;
6803}
6804
6805inline const Type *Type::getPointeeOrArrayElementType() const {
6806 const Type *type = this;
6807 if (type->isAnyPointerType())
6808 return type->getPointeeType().getTypePtr();
6809 else if (type->isArrayType())
6810 return type->getBaseElementTypeUnsafe();
6811 return type;
6812}
6813
6814/// Insertion operator for diagnostics. This allows sending Qualifiers into a
6815/// diagnostic with <<.
6816inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB,
6817 Qualifiers Q) {
6818 DB.AddTaggedVal(Q.getAsOpaqueValue(),
6819 DiagnosticsEngine::ArgumentKind::ak_qual);
6820 return DB;
6821}
6822
6823/// Insertion operator for partial diagnostics. This allows sending Qualifiers
6824/// into a diagnostic with <<.
6825inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD,
6826 Qualifiers Q) {
6827 PD.AddTaggedVal(Q.getAsOpaqueValue(),
6828 DiagnosticsEngine::ArgumentKind::ak_qual);
6829 return PD;
6830}
6831
6832/// Insertion operator for diagnostics. This allows sending QualType's into a
6833/// diagnostic with <<.
6834inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB,
6835 QualType T) {
6836 DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()),
6837 DiagnosticsEngine::ak_qualtype);
6838 return DB;
6839}
6840
6841/// Insertion operator for partial diagnostics. This allows sending QualType's
6842/// into a diagnostic with <<.
6843inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD,
6844 QualType T) {
6845 PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()),
6846 DiagnosticsEngine::ak_qualtype);
6847 return PD;
6848}
6849
6850// Helper class template that is used by Type::getAs to ensure that one does
6851// not try to look through a qualified type to get to an array type.
6852template <typename T>
6853using TypeIsArrayType =
6854 std::integral_constant<bool, std::is_same<T, ArrayType>::value ||
6855 std::is_base_of<ArrayType, T>::value>;
6856
6857// Member-template getAs<specific type>'.
6858template <typename T> const T *Type::getAs() const {
6859 static_assert(!TypeIsArrayType<T>::value,
6860 "ArrayType cannot be used with getAs!");
6861
6862 // If this is directly a T type, return it.
6863 if (const auto *Ty = dyn_cast<T>(this))
6864 return Ty;
6865
6866 // If the canonical form of this type isn't the right kind, reject it.
6867 if (!isa<T>(CanonicalType))
6868 return nullptr;
6869
6870 // If this is a typedef for the type, strip the typedef off without
6871 // losing all typedef information.
6872 return cast<T>(getUnqualifiedDesugaredType());
6873}
6874
6875template <typename T> const T *Type::getAsAdjusted() const {
6876 static_assert(!TypeIsArrayType<T>::value, "ArrayType cannot be used with getAsAdjusted!");
6877
6878 // If this is directly a T type, return it.
6879 if (const auto *Ty = dyn_cast<T>(this))
6880 return Ty;
6881
6882 // If the canonical form of this type isn't the right kind, reject it.
6883 if (!isa<T>(CanonicalType))
6884 return nullptr;
6885
6886 // Strip off type adjustments that do not modify the underlying nature of the
6887 // type.
6888 const Type *Ty = this;
6889 while (Ty) {
6890 if (const auto *A = dyn_cast<AttributedType>(Ty))
6891 Ty = A->getModifiedType().getTypePtr();
6892 else if (const auto *E = dyn_cast<ElaboratedType>(Ty))
6893 Ty = E->desugar().getTypePtr();
6894 else if (const auto *P = dyn_cast<ParenType>(Ty))
6895 Ty = P->desugar().getTypePtr();
6896 else if (const auto *A = dyn_cast<AdjustedType>(Ty))
6897 Ty = A->desugar().getTypePtr();
6898 else if (const auto *M = dyn_cast<MacroQualifiedType>(Ty))
6899 Ty = M->desugar().getTypePtr();
6900 else
6901 break;
6902 }
6903
6904 // Just because the canonical type is correct does not mean we can use cast<>,
6905 // since we may not have stripped off all the sugar down to the base type.
6906 return dyn_cast<T>(Ty);
6907}
6908
6909inline const ArrayType *Type::getAsArrayTypeUnsafe() const {
6910 // If this is directly an array type, return it.
6911 if (const auto *arr = dyn_cast<ArrayType>(this))
6912 return arr;
6913
6914 // If the canonical form of this type isn't the right kind, reject it.
6915 if (!isa<ArrayType>(CanonicalType))
6916 return nullptr;
6917
6918 // If this is a typedef for the type, strip the typedef off without
6919 // losing all typedef information.
6920 return cast<ArrayType>(getUnqualifiedDesugaredType());
6921}
6922
6923template <typename T> const T *Type::castAs() const {
6924 static_assert(!TypeIsArrayType<T>::value,
6925 "ArrayType cannot be used with castAs!");
6926
6927 if (const auto *ty = dyn_cast<T>(this)) return ty;
6928 assert(isa<T>(CanonicalType))((isa<T>(CanonicalType)) ? static_cast<void> (0) :
__assert_fail ("isa<T>(CanonicalType)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 6928, __PRETTY_FUNCTION__))
;
6929 return cast<T>(getUnqualifiedDesugaredType());
6930}
6931
6932inline const ArrayType *Type::castAsArrayTypeUnsafe() const {
6933 assert(isa<ArrayType>(CanonicalType))((isa<ArrayType>(CanonicalType)) ? static_cast<void>
(0) : __assert_fail ("isa<ArrayType>(CanonicalType)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 6933, __PRETTY_FUNCTION__))
;
6934 if (const auto *arr = dyn_cast<ArrayType>(this)) return arr;
6935 return cast<ArrayType>(getUnqualifiedDesugaredType());
6936}
6937
6938DecayedType::DecayedType(QualType OriginalType, QualType DecayedPtr,
6939 QualType CanonicalPtr)
6940 : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) {
6941#ifndef NDEBUG
6942 QualType Adjusted = getAdjustedType();
6943 (void)AttributedType::stripOuterNullability(Adjusted);
6944 assert(isa<PointerType>(Adjusted))((isa<PointerType>(Adjusted)) ? static_cast<void>
(0) : __assert_fail ("isa<PointerType>(Adjusted)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h"
, 6944, __PRETTY_FUNCTION__))
;
6945#endif
6946}
6947
6948QualType DecayedType::getPointeeType() const {
6949 QualType Decayed = getDecayedType();
6950 (void)AttributedType::stripOuterNullability(Decayed);
6951 return cast<PointerType>(Decayed)->getPointeeType();
6952}
6953
6954// Get the decimal string representation of a fixed point type, represented
6955// as a scaled integer.
6956// TODO: At some point, we should change the arguments to instead just accept an
6957// APFixedPoint instead of APSInt and scale.
6958void FixedPointValueToString(SmallVectorImpl<char> &Str, llvm::APSInt Val,
6959 unsigned Scale);
6960
6961} // namespace clang
6962
6963#endif // LLVM_CLANG_AST_TYPE_H