Bug Summary

File:tools/clang/lib/Sema/SemaType.cpp
Warning:line 7358, column 27
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 SemaType.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~svn374814/build-llvm/tools/clang/lib/Sema -I /build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema -I /build/llvm-toolchain-snapshot-10~svn374814/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn374814/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn374814/build-llvm/include -I /build/llvm-toolchain-snapshot-10~svn374814/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~svn374814/build-llvm/tools/clang/lib/Sema -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~svn374814=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -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-2019-10-15-035155-28452-1 -x c++ /build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp

/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp

1//===--- SemaType.cpp - Semantic Analysis for Types -----------------------===//
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// This file implements type-related semantic analysis.
10//
11//===----------------------------------------------------------------------===//
12
13#include "TypeLocBuilder.h"
14#include "clang/AST/ASTConsumer.h"
15#include "clang/AST/ASTContext.h"
16#include "clang/AST/ASTMutationListener.h"
17#include "clang/AST/ASTStructuralEquivalence.h"
18#include "clang/AST/CXXInheritance.h"
19#include "clang/AST/DeclObjC.h"
20#include "clang/AST/DeclTemplate.h"
21#include "clang/AST/Expr.h"
22#include "clang/AST/TypeLoc.h"
23#include "clang/AST/TypeLocVisitor.h"
24#include "clang/Basic/PartialDiagnostic.h"
25#include "clang/Basic/TargetInfo.h"
26#include "clang/Lex/Preprocessor.h"
27#include "clang/Sema/DeclSpec.h"
28#include "clang/Sema/DelayedDiagnostic.h"
29#include "clang/Sema/Lookup.h"
30#include "clang/Sema/ScopeInfo.h"
31#include "clang/Sema/SemaInternal.h"
32#include "clang/Sema/Template.h"
33#include "clang/Sema/TemplateInstCallback.h"
34#include "llvm/ADT/SmallPtrSet.h"
35#include "llvm/ADT/SmallString.h"
36#include "llvm/ADT/StringSwitch.h"
37#include "llvm/Support/ErrorHandling.h"
38
39using namespace clang;
40
41enum TypeDiagSelector {
42 TDS_Function,
43 TDS_Pointer,
44 TDS_ObjCObjOrBlock
45};
46
47/// isOmittedBlockReturnType - Return true if this declarator is missing a
48/// return type because this is a omitted return type on a block literal.
49static bool isOmittedBlockReturnType(const Declarator &D) {
50 if (D.getContext() != DeclaratorContext::BlockLiteralContext ||
51 D.getDeclSpec().hasTypeSpecifier())
52 return false;
53
54 if (D.getNumTypeObjects() == 0)
55 return true; // ^{ ... }
56
57 if (D.getNumTypeObjects() == 1 &&
58 D.getTypeObject(0).Kind == DeclaratorChunk::Function)
59 return true; // ^(int X, float Y) { ... }
60
61 return false;
62}
63
64/// diagnoseBadTypeAttribute - Diagnoses a type attribute which
65/// doesn't apply to the given type.
66static void diagnoseBadTypeAttribute(Sema &S, const ParsedAttr &attr,
67 QualType type) {
68 TypeDiagSelector WhichType;
69 bool useExpansionLoc = true;
70 switch (attr.getKind()) {
71 case ParsedAttr::AT_ObjCGC:
72 WhichType = TDS_Pointer;
73 break;
74 case ParsedAttr::AT_ObjCOwnership:
75 WhichType = TDS_ObjCObjOrBlock;
76 break;
77 default:
78 // Assume everything else was a function attribute.
79 WhichType = TDS_Function;
80 useExpansionLoc = false;
81 break;
82 }
83
84 SourceLocation loc = attr.getLoc();
85 StringRef name = attr.getAttrName()->getName();
86
87 // The GC attributes are usually written with macros; special-case them.
88 IdentifierInfo *II = attr.isArgIdent(0) ? attr.getArgAsIdent(0)->Ident
89 : nullptr;
90 if (useExpansionLoc && loc.isMacroID() && II) {
91 if (II->isStr("strong")) {
92 if (S.findMacroSpelling(loc, "__strong")) name = "__strong";
93 } else if (II->isStr("weak")) {
94 if (S.findMacroSpelling(loc, "__weak")) name = "__weak";
95 }
96 }
97
98 S.Diag(loc, diag::warn_type_attribute_wrong_type) << name << WhichType
99 << type;
100}
101
102// objc_gc applies to Objective-C pointers or, otherwise, to the
103// smallest available pointer type (i.e. 'void*' in 'void**').
104#define OBJC_POINTER_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_ObjCGC: case ParsedAttr::AT_ObjCOwnership \
105 case ParsedAttr::AT_ObjCGC: \
106 case ParsedAttr::AT_ObjCOwnership
107
108// Calling convention attributes.
109#define CALLING_CONV_ATTRS_CASELISTcase ParsedAttr::AT_CDecl: case ParsedAttr::AT_FastCall: case
ParsedAttr::AT_StdCall: case ParsedAttr::AT_ThisCall: case ParsedAttr
::AT_RegCall: case ParsedAttr::AT_Pascal: case ParsedAttr::AT_SwiftCall
: case ParsedAttr::AT_VectorCall: case ParsedAttr::AT_AArch64VectorPcs
: case ParsedAttr::AT_MSABI: case ParsedAttr::AT_SysVABI: case
ParsedAttr::AT_Pcs: case ParsedAttr::AT_IntelOclBicc: case ParsedAttr
::AT_PreserveMost: case ParsedAttr::AT_PreserveAll
\
110 case ParsedAttr::AT_CDecl: \
111 case ParsedAttr::AT_FastCall: \
112 case ParsedAttr::AT_StdCall: \
113 case ParsedAttr::AT_ThisCall: \
114 case ParsedAttr::AT_RegCall: \
115 case ParsedAttr::AT_Pascal: \
116 case ParsedAttr::AT_SwiftCall: \
117 case ParsedAttr::AT_VectorCall: \
118 case ParsedAttr::AT_AArch64VectorPcs: \
119 case ParsedAttr::AT_MSABI: \
120 case ParsedAttr::AT_SysVABI: \
121 case ParsedAttr::AT_Pcs: \
122 case ParsedAttr::AT_IntelOclBicc: \
123 case ParsedAttr::AT_PreserveMost: \
124 case ParsedAttr::AT_PreserveAll
125
126// Function type attributes.
127#define FUNCTION_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_NSReturnsRetained: case ParsedAttr::AT_NoReturn
: case ParsedAttr::AT_Regparm: case ParsedAttr::AT_AnyX86NoCallerSavedRegisters
: case ParsedAttr::AT_AnyX86NoCfCheck: case ParsedAttr::AT_CDecl
: case ParsedAttr::AT_FastCall: case ParsedAttr::AT_StdCall: case
ParsedAttr::AT_ThisCall: case ParsedAttr::AT_RegCall: case ParsedAttr
::AT_Pascal: case ParsedAttr::AT_SwiftCall: case ParsedAttr::
AT_VectorCall: case ParsedAttr::AT_AArch64VectorPcs: case ParsedAttr
::AT_MSABI: case ParsedAttr::AT_SysVABI: case ParsedAttr::AT_Pcs
: case ParsedAttr::AT_IntelOclBicc: case ParsedAttr::AT_PreserveMost
: case ParsedAttr::AT_PreserveAll
\
128 case ParsedAttr::AT_NSReturnsRetained: \
129 case ParsedAttr::AT_NoReturn: \
130 case ParsedAttr::AT_Regparm: \
131 case ParsedAttr::AT_AnyX86NoCallerSavedRegisters: \
132 case ParsedAttr::AT_AnyX86NoCfCheck: \
133 CALLING_CONV_ATTRS_CASELISTcase ParsedAttr::AT_CDecl: case ParsedAttr::AT_FastCall: case
ParsedAttr::AT_StdCall: case ParsedAttr::AT_ThisCall: case ParsedAttr
::AT_RegCall: case ParsedAttr::AT_Pascal: case ParsedAttr::AT_SwiftCall
: case ParsedAttr::AT_VectorCall: case ParsedAttr::AT_AArch64VectorPcs
: case ParsedAttr::AT_MSABI: case ParsedAttr::AT_SysVABI: case
ParsedAttr::AT_Pcs: case ParsedAttr::AT_IntelOclBicc: case ParsedAttr
::AT_PreserveMost: case ParsedAttr::AT_PreserveAll
134
135// Microsoft-specific type qualifiers.
136#define MS_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_Ptr32: case ParsedAttr::AT_Ptr64: case ParsedAttr
::AT_SPtr: case ParsedAttr::AT_UPtr
\
137 case ParsedAttr::AT_Ptr32: \
138 case ParsedAttr::AT_Ptr64: \
139 case ParsedAttr::AT_SPtr: \
140 case ParsedAttr::AT_UPtr
141
142// Nullability qualifiers.
143#define NULLABILITY_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_TypeNonNull: case ParsedAttr::AT_TypeNullable
: case ParsedAttr::AT_TypeNullUnspecified
\
144 case ParsedAttr::AT_TypeNonNull: \
145 case ParsedAttr::AT_TypeNullable: \
146 case ParsedAttr::AT_TypeNullUnspecified
147
148namespace {
149 /// An object which stores processing state for the entire
150 /// GetTypeForDeclarator process.
151 class TypeProcessingState {
152 Sema &sema;
153
154 /// The declarator being processed.
155 Declarator &declarator;
156
157 /// The index of the declarator chunk we're currently processing.
158 /// May be the total number of valid chunks, indicating the
159 /// DeclSpec.
160 unsigned chunkIndex;
161
162 /// Whether there are non-trivial modifications to the decl spec.
163 bool trivial;
164
165 /// Whether we saved the attributes in the decl spec.
166 bool hasSavedAttrs;
167
168 /// The original set of attributes on the DeclSpec.
169 SmallVector<ParsedAttr *, 2> savedAttrs;
170
171 /// A list of attributes to diagnose the uselessness of when the
172 /// processing is complete.
173 SmallVector<ParsedAttr *, 2> ignoredTypeAttrs;
174
175 /// Attributes corresponding to AttributedTypeLocs that we have not yet
176 /// populated.
177 // FIXME: The two-phase mechanism by which we construct Types and fill
178 // their TypeLocs makes it hard to correctly assign these. We keep the
179 // attributes in creation order as an attempt to make them line up
180 // properly.
181 using TypeAttrPair = std::pair<const AttributedType*, const Attr*>;
182 SmallVector<TypeAttrPair, 8> AttrsForTypes;
183 bool AttrsForTypesSorted = true;
184
185 /// MacroQualifiedTypes mapping to macro expansion locations that will be
186 /// stored in a MacroQualifiedTypeLoc.
187 llvm::DenseMap<const MacroQualifiedType *, SourceLocation> LocsForMacros;
188
189 /// Flag to indicate we parsed a noderef attribute. This is used for
190 /// validating that noderef was used on a pointer or array.
191 bool parsedNoDeref;
192
193 public:
194 TypeProcessingState(Sema &sema, Declarator &declarator)
195 : sema(sema), declarator(declarator),
196 chunkIndex(declarator.getNumTypeObjects()), trivial(true),
197 hasSavedAttrs(false), parsedNoDeref(false) {}
198
199 Sema &getSema() const {
200 return sema;
201 }
202
203 Declarator &getDeclarator() const {
204 return declarator;
205 }
206
207 bool isProcessingDeclSpec() const {
208 return chunkIndex == declarator.getNumTypeObjects();
209 }
210
211 unsigned getCurrentChunkIndex() const {
212 return chunkIndex;
213 }
214
215 void setCurrentChunkIndex(unsigned idx) {
216 assert(idx <= declarator.getNumTypeObjects())((idx <= declarator.getNumTypeObjects()) ? static_cast<
void> (0) : __assert_fail ("idx <= declarator.getNumTypeObjects()"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 216, __PRETTY_FUNCTION__))
;
217 chunkIndex = idx;
218 }
219
220 ParsedAttributesView &getCurrentAttributes() const {
221 if (isProcessingDeclSpec())
222 return getMutableDeclSpec().getAttributes();
223 return declarator.getTypeObject(chunkIndex).getAttrs();
224 }
225
226 /// Save the current set of attributes on the DeclSpec.
227 void saveDeclSpecAttrs() {
228 // Don't try to save them multiple times.
229 if (hasSavedAttrs) return;
230
231 DeclSpec &spec = getMutableDeclSpec();
232 for (ParsedAttr &AL : spec.getAttributes())
233 savedAttrs.push_back(&AL);
234 trivial &= savedAttrs.empty();
235 hasSavedAttrs = true;
236 }
237
238 /// Record that we had nowhere to put the given type attribute.
239 /// We will diagnose such attributes later.
240 void addIgnoredTypeAttr(ParsedAttr &attr) {
241 ignoredTypeAttrs.push_back(&attr);
242 }
243
244 /// Diagnose all the ignored type attributes, given that the
245 /// declarator worked out to the given type.
246 void diagnoseIgnoredTypeAttrs(QualType type) const {
247 for (auto *Attr : ignoredTypeAttrs)
248 diagnoseBadTypeAttribute(getSema(), *Attr, type);
249 }
250
251 /// Get an attributed type for the given attribute, and remember the Attr
252 /// object so that we can attach it to the AttributedTypeLoc.
253 QualType getAttributedType(Attr *A, QualType ModifiedType,
254 QualType EquivType) {
255 QualType T =
256 sema.Context.getAttributedType(A->getKind(), ModifiedType, EquivType);
257 AttrsForTypes.push_back({cast<AttributedType>(T.getTypePtr()), A});
258 AttrsForTypesSorted = false;
259 return T;
260 }
261
262 /// Completely replace the \c auto in \p TypeWithAuto by
263 /// \p Replacement. Also replace \p TypeWithAuto in \c TypeAttrPair if
264 /// necessary.
265 QualType ReplaceAutoType(QualType TypeWithAuto, QualType Replacement) {
266 QualType T = sema.ReplaceAutoType(TypeWithAuto, Replacement);
267 if (auto *AttrTy = TypeWithAuto->getAs<AttributedType>()) {
268 // Attributed type still should be an attributed type after replacement.
269 auto *NewAttrTy = cast<AttributedType>(T.getTypePtr());
270 for (TypeAttrPair &A : AttrsForTypes) {
271 if (A.first == AttrTy)
272 A.first = NewAttrTy;
273 }
274 AttrsForTypesSorted = false;
275 }
276 return T;
277 }
278
279 /// Extract and remove the Attr* for a given attributed type.
280 const Attr *takeAttrForAttributedType(const AttributedType *AT) {
281 if (!AttrsForTypesSorted) {
282 llvm::stable_sort(AttrsForTypes, llvm::less_first());
283 AttrsForTypesSorted = true;
284 }
285
286 // FIXME: This is quadratic if we have lots of reuses of the same
287 // attributed type.
288 for (auto It = std::partition_point(
289 AttrsForTypes.begin(), AttrsForTypes.end(),
290 [=](const TypeAttrPair &A) { return A.first < AT; });
291 It != AttrsForTypes.end() && It->first == AT; ++It) {
292 if (It->second) {
293 const Attr *Result = It->second;
294 It->second = nullptr;
295 return Result;
296 }
297 }
298
299 llvm_unreachable("no Attr* for AttributedType*")::llvm::llvm_unreachable_internal("no Attr* for AttributedType*"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 299)
;
300 }
301
302 SourceLocation
303 getExpansionLocForMacroQualifiedType(const MacroQualifiedType *MQT) const {
304 auto FoundLoc = LocsForMacros.find(MQT);
305 assert(FoundLoc != LocsForMacros.end() &&((FoundLoc != LocsForMacros.end() && "Unable to find macro expansion location for MacroQualifedType"
) ? static_cast<void> (0) : __assert_fail ("FoundLoc != LocsForMacros.end() && \"Unable to find macro expansion location for MacroQualifedType\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 306, __PRETTY_FUNCTION__))
306 "Unable to find macro expansion location for MacroQualifedType")((FoundLoc != LocsForMacros.end() && "Unable to find macro expansion location for MacroQualifedType"
) ? static_cast<void> (0) : __assert_fail ("FoundLoc != LocsForMacros.end() && \"Unable to find macro expansion location for MacroQualifedType\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 306, __PRETTY_FUNCTION__))
;
307 return FoundLoc->second;
308 }
309
310 void setExpansionLocForMacroQualifiedType(const MacroQualifiedType *MQT,
311 SourceLocation Loc) {
312 LocsForMacros[MQT] = Loc;
313 }
314
315 void setParsedNoDeref(bool parsed) { parsedNoDeref = parsed; }
316
317 bool didParseNoDeref() const { return parsedNoDeref; }
318
319 ~TypeProcessingState() {
320 if (trivial) return;
321
322 restoreDeclSpecAttrs();
323 }
324
325 private:
326 DeclSpec &getMutableDeclSpec() const {
327 return const_cast<DeclSpec&>(declarator.getDeclSpec());
328 }
329
330 void restoreDeclSpecAttrs() {
331 assert(hasSavedAttrs)((hasSavedAttrs) ? static_cast<void> (0) : __assert_fail
("hasSavedAttrs", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 331, __PRETTY_FUNCTION__))
;
332
333 getMutableDeclSpec().getAttributes().clearListOnly();
334 for (ParsedAttr *AL : savedAttrs)
335 getMutableDeclSpec().getAttributes().addAtEnd(AL);
336 }
337 };
338} // end anonymous namespace
339
340static void moveAttrFromListToList(ParsedAttr &attr,
341 ParsedAttributesView &fromList,
342 ParsedAttributesView &toList) {
343 fromList.remove(&attr);
344 toList.addAtEnd(&attr);
345}
346
347/// The location of a type attribute.
348enum TypeAttrLocation {
349 /// The attribute is in the decl-specifier-seq.
350 TAL_DeclSpec,
351 /// The attribute is part of a DeclaratorChunk.
352 TAL_DeclChunk,
353 /// The attribute is immediately after the declaration's name.
354 TAL_DeclName
355};
356
357static void processTypeAttrs(TypeProcessingState &state, QualType &type,
358 TypeAttrLocation TAL, ParsedAttributesView &attrs);
359
360static bool handleFunctionTypeAttr(TypeProcessingState &state, ParsedAttr &attr,
361 QualType &type);
362
363static bool handleMSPointerTypeQualifierAttr(TypeProcessingState &state,
364 ParsedAttr &attr, QualType &type);
365
366static bool handleObjCGCTypeAttr(TypeProcessingState &state, ParsedAttr &attr,
367 QualType &type);
368
369static bool handleObjCOwnershipTypeAttr(TypeProcessingState &state,
370 ParsedAttr &attr, QualType &type);
371
372static bool handleObjCPointerTypeAttr(TypeProcessingState &state,
373 ParsedAttr &attr, QualType &type) {
374 if (attr.getKind() == ParsedAttr::AT_ObjCGC)
375 return handleObjCGCTypeAttr(state, attr, type);
376 assert(attr.getKind() == ParsedAttr::AT_ObjCOwnership)((attr.getKind() == ParsedAttr::AT_ObjCOwnership) ? static_cast
<void> (0) : __assert_fail ("attr.getKind() == ParsedAttr::AT_ObjCOwnership"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 376, __PRETTY_FUNCTION__))
;
377 return handleObjCOwnershipTypeAttr(state, attr, type);
378}
379
380/// Given the index of a declarator chunk, check whether that chunk
381/// directly specifies the return type of a function and, if so, find
382/// an appropriate place for it.
383///
384/// \param i - a notional index which the search will start
385/// immediately inside
386///
387/// \param onlyBlockPointers Whether we should only look into block
388/// pointer types (vs. all pointer types).
389static DeclaratorChunk *maybeMovePastReturnType(Declarator &declarator,
390 unsigned i,
391 bool onlyBlockPointers) {
392 assert(i <= declarator.getNumTypeObjects())((i <= declarator.getNumTypeObjects()) ? static_cast<void
> (0) : __assert_fail ("i <= declarator.getNumTypeObjects()"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 392, __PRETTY_FUNCTION__))
;
393
394 DeclaratorChunk *result = nullptr;
395
396 // First, look inwards past parens for a function declarator.
397 for (; i != 0; --i) {
398 DeclaratorChunk &fnChunk = declarator.getTypeObject(i-1);
399 switch (fnChunk.Kind) {
400 case DeclaratorChunk::Paren:
401 continue;
402
403 // If we find anything except a function, bail out.
404 case DeclaratorChunk::Pointer:
405 case DeclaratorChunk::BlockPointer:
406 case DeclaratorChunk::Array:
407 case DeclaratorChunk::Reference:
408 case DeclaratorChunk::MemberPointer:
409 case DeclaratorChunk::Pipe:
410 return result;
411
412 // If we do find a function declarator, scan inwards from that,
413 // looking for a (block-)pointer declarator.
414 case DeclaratorChunk::Function:
415 for (--i; i != 0; --i) {
416 DeclaratorChunk &ptrChunk = declarator.getTypeObject(i-1);
417 switch (ptrChunk.Kind) {
418 case DeclaratorChunk::Paren:
419 case DeclaratorChunk::Array:
420 case DeclaratorChunk::Function:
421 case DeclaratorChunk::Reference:
422 case DeclaratorChunk::Pipe:
423 continue;
424
425 case DeclaratorChunk::MemberPointer:
426 case DeclaratorChunk::Pointer:
427 if (onlyBlockPointers)
428 continue;
429
430 LLVM_FALLTHROUGH[[gnu::fallthrough]];
431
432 case DeclaratorChunk::BlockPointer:
433 result = &ptrChunk;
434 goto continue_outer;
435 }
436 llvm_unreachable("bad declarator chunk kind")::llvm::llvm_unreachable_internal("bad declarator chunk kind"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 436)
;
437 }
438
439 // If we run out of declarators doing that, we're done.
440 return result;
441 }
442 llvm_unreachable("bad declarator chunk kind")::llvm::llvm_unreachable_internal("bad declarator chunk kind"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 442)
;
443
444 // Okay, reconsider from our new point.
445 continue_outer: ;
446 }
447
448 // Ran out of chunks, bail out.
449 return result;
450}
451
452/// Given that an objc_gc attribute was written somewhere on a
453/// declaration *other* than on the declarator itself (for which, use
454/// distributeObjCPointerTypeAttrFromDeclarator), and given that it
455/// didn't apply in whatever position it was written in, try to move
456/// it to a more appropriate position.
457static void distributeObjCPointerTypeAttr(TypeProcessingState &state,
458 ParsedAttr &attr, QualType type) {
459 Declarator &declarator = state.getDeclarator();
460
461 // Move it to the outermost normal or block pointer declarator.
462 for (unsigned i = state.getCurrentChunkIndex(); i != 0; --i) {
463 DeclaratorChunk &chunk = declarator.getTypeObject(i-1);
464 switch (chunk.Kind) {
465 case DeclaratorChunk::Pointer:
466 case DeclaratorChunk::BlockPointer: {
467 // But don't move an ARC ownership attribute to the return type
468 // of a block.
469 DeclaratorChunk *destChunk = nullptr;
470 if (state.isProcessingDeclSpec() &&
471 attr.getKind() == ParsedAttr::AT_ObjCOwnership)
472 destChunk = maybeMovePastReturnType(declarator, i - 1,
473 /*onlyBlockPointers=*/true);
474 if (!destChunk) destChunk = &chunk;
475
476 moveAttrFromListToList(attr, state.getCurrentAttributes(),
477 destChunk->getAttrs());
478 return;
479 }
480
481 case DeclaratorChunk::Paren:
482 case DeclaratorChunk::Array:
483 continue;
484
485 // We may be starting at the return type of a block.
486 case DeclaratorChunk::Function:
487 if (state.isProcessingDeclSpec() &&
488 attr.getKind() == ParsedAttr::AT_ObjCOwnership) {
489 if (DeclaratorChunk *dest = maybeMovePastReturnType(
490 declarator, i,
491 /*onlyBlockPointers=*/true)) {
492 moveAttrFromListToList(attr, state.getCurrentAttributes(),
493 dest->getAttrs());
494 return;
495 }
496 }
497 goto error;
498
499 // Don't walk through these.
500 case DeclaratorChunk::Reference:
501 case DeclaratorChunk::MemberPointer:
502 case DeclaratorChunk::Pipe:
503 goto error;
504 }
505 }
506 error:
507
508 diagnoseBadTypeAttribute(state.getSema(), attr, type);
509}
510
511/// Distribute an objc_gc type attribute that was written on the
512/// declarator.
513static void distributeObjCPointerTypeAttrFromDeclarator(
514 TypeProcessingState &state, ParsedAttr &attr, QualType &declSpecType) {
515 Declarator &declarator = state.getDeclarator();
516
517 // objc_gc goes on the innermost pointer to something that's not a
518 // pointer.
519 unsigned innermost = -1U;
520 bool considerDeclSpec = true;
521 for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) {
522 DeclaratorChunk &chunk = declarator.getTypeObject(i);
523 switch (chunk.Kind) {
524 case DeclaratorChunk::Pointer:
525 case DeclaratorChunk::BlockPointer:
526 innermost = i;
527 continue;
528
529 case DeclaratorChunk::Reference:
530 case DeclaratorChunk::MemberPointer:
531 case DeclaratorChunk::Paren:
532 case DeclaratorChunk::Array:
533 case DeclaratorChunk::Pipe:
534 continue;
535
536 case DeclaratorChunk::Function:
537 considerDeclSpec = false;
538 goto done;
539 }
540 }
541 done:
542
543 // That might actually be the decl spec if we weren't blocked by
544 // anything in the declarator.
545 if (considerDeclSpec) {
546 if (handleObjCPointerTypeAttr(state, attr, declSpecType)) {
547 // Splice the attribute into the decl spec. Prevents the
548 // attribute from being applied multiple times and gives
549 // the source-location-filler something to work with.
550 state.saveDeclSpecAttrs();
551 declarator.getMutableDeclSpec().getAttributes().takeOneFrom(
552 declarator.getAttributes(), &attr);
553 return;
554 }
555 }
556
557 // Otherwise, if we found an appropriate chunk, splice the attribute
558 // into it.
559 if (innermost != -1U) {
560 moveAttrFromListToList(attr, declarator.getAttributes(),
561 declarator.getTypeObject(innermost).getAttrs());
562 return;
563 }
564
565 // Otherwise, diagnose when we're done building the type.
566 declarator.getAttributes().remove(&attr);
567 state.addIgnoredTypeAttr(attr);
568}
569
570/// A function type attribute was written somewhere in a declaration
571/// *other* than on the declarator itself or in the decl spec. Given
572/// that it didn't apply in whatever position it was written in, try
573/// to move it to a more appropriate position.
574static void distributeFunctionTypeAttr(TypeProcessingState &state,
575 ParsedAttr &attr, QualType type) {
576 Declarator &declarator = state.getDeclarator();
577
578 // Try to push the attribute from the return type of a function to
579 // the function itself.
580 for (unsigned i = state.getCurrentChunkIndex(); i != 0; --i) {
581 DeclaratorChunk &chunk = declarator.getTypeObject(i-1);
582 switch (chunk.Kind) {
583 case DeclaratorChunk::Function:
584 moveAttrFromListToList(attr, state.getCurrentAttributes(),
585 chunk.getAttrs());
586 return;
587
588 case DeclaratorChunk::Paren:
589 case DeclaratorChunk::Pointer:
590 case DeclaratorChunk::BlockPointer:
591 case DeclaratorChunk::Array:
592 case DeclaratorChunk::Reference:
593 case DeclaratorChunk::MemberPointer:
594 case DeclaratorChunk::Pipe:
595 continue;
596 }
597 }
598
599 diagnoseBadTypeAttribute(state.getSema(), attr, type);
600}
601
602/// Try to distribute a function type attribute to the innermost
603/// function chunk or type. Returns true if the attribute was
604/// distributed, false if no location was found.
605static bool distributeFunctionTypeAttrToInnermost(
606 TypeProcessingState &state, ParsedAttr &attr,
607 ParsedAttributesView &attrList, QualType &declSpecType) {
608 Declarator &declarator = state.getDeclarator();
609
610 // Put it on the innermost function chunk, if there is one.
611 for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) {
612 DeclaratorChunk &chunk = declarator.getTypeObject(i);
613 if (chunk.Kind != DeclaratorChunk::Function) continue;
614
615 moveAttrFromListToList(attr, attrList, chunk.getAttrs());
616 return true;
617 }
618
619 return handleFunctionTypeAttr(state, attr, declSpecType);
620}
621
622/// A function type attribute was written in the decl spec. Try to
623/// apply it somewhere.
624static void distributeFunctionTypeAttrFromDeclSpec(TypeProcessingState &state,
625 ParsedAttr &attr,
626 QualType &declSpecType) {
627 state.saveDeclSpecAttrs();
628
629 // C++11 attributes before the decl specifiers actually appertain to
630 // the declarators. Move them straight there. We don't support the
631 // 'put them wherever you like' semantics we allow for GNU attributes.
632 if (attr.isCXX11Attribute()) {
633 moveAttrFromListToList(attr, state.getCurrentAttributes(),
634 state.getDeclarator().getAttributes());
635 return;
636 }
637
638 // Try to distribute to the innermost.
639 if (distributeFunctionTypeAttrToInnermost(
640 state, attr, state.getCurrentAttributes(), declSpecType))
641 return;
642
643 // If that failed, diagnose the bad attribute when the declarator is
644 // fully built.
645 state.addIgnoredTypeAttr(attr);
646}
647
648/// A function type attribute was written on the declarator. Try to
649/// apply it somewhere.
650static void distributeFunctionTypeAttrFromDeclarator(TypeProcessingState &state,
651 ParsedAttr &attr,
652 QualType &declSpecType) {
653 Declarator &declarator = state.getDeclarator();
654
655 // Try to distribute to the innermost.
656 if (distributeFunctionTypeAttrToInnermost(
657 state, attr, declarator.getAttributes(), declSpecType))
658 return;
659
660 // If that failed, diagnose the bad attribute when the declarator is
661 // fully built.
662 declarator.getAttributes().remove(&attr);
663 state.addIgnoredTypeAttr(attr);
664}
665
666/// Given that there are attributes written on the declarator
667/// itself, try to distribute any type attributes to the appropriate
668/// declarator chunk.
669///
670/// These are attributes like the following:
671/// int f ATTR;
672/// int (f ATTR)();
673/// but not necessarily this:
674/// int f() ATTR;
675static void distributeTypeAttrsFromDeclarator(TypeProcessingState &state,
676 QualType &declSpecType) {
677 // Collect all the type attributes from the declarator itself.
678 assert(!state.getDeclarator().getAttributes().empty() &&((!state.getDeclarator().getAttributes().empty() && "declarator has no attrs!"
) ? static_cast<void> (0) : __assert_fail ("!state.getDeclarator().getAttributes().empty() && \"declarator has no attrs!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 679, __PRETTY_FUNCTION__))
679 "declarator has no attrs!")((!state.getDeclarator().getAttributes().empty() && "declarator has no attrs!"
) ? static_cast<void> (0) : __assert_fail ("!state.getDeclarator().getAttributes().empty() && \"declarator has no attrs!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 679, __PRETTY_FUNCTION__))
;
680 // The called functions in this loop actually remove things from the current
681 // list, so iterating over the existing list isn't possible. Instead, make a
682 // non-owning copy and iterate over that.
683 ParsedAttributesView AttrsCopy{state.getDeclarator().getAttributes()};
684 for (ParsedAttr &attr : AttrsCopy) {
685 // Do not distribute C++11 attributes. They have strict rules for what
686 // they appertain to.
687 if (attr.isCXX11Attribute())
688 continue;
689
690 switch (attr.getKind()) {
691 OBJC_POINTER_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_ObjCGC: case ParsedAttr::AT_ObjCOwnership:
692 distributeObjCPointerTypeAttrFromDeclarator(state, attr, declSpecType);
693 break;
694
695 FUNCTION_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_NSReturnsRetained: case ParsedAttr::AT_NoReturn
: case ParsedAttr::AT_Regparm: case ParsedAttr::AT_AnyX86NoCallerSavedRegisters
: case ParsedAttr::AT_AnyX86NoCfCheck: case ParsedAttr::AT_CDecl
: case ParsedAttr::AT_FastCall: case ParsedAttr::AT_StdCall: case
ParsedAttr::AT_ThisCall: case ParsedAttr::AT_RegCall: case ParsedAttr
::AT_Pascal: case ParsedAttr::AT_SwiftCall: case ParsedAttr::
AT_VectorCall: case ParsedAttr::AT_AArch64VectorPcs: case ParsedAttr
::AT_MSABI: case ParsedAttr::AT_SysVABI: case ParsedAttr::AT_Pcs
: case ParsedAttr::AT_IntelOclBicc: case ParsedAttr::AT_PreserveMost
: case ParsedAttr::AT_PreserveAll
:
696 distributeFunctionTypeAttrFromDeclarator(state, attr, declSpecType);
697 break;
698
699 MS_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_Ptr32: case ParsedAttr::AT_Ptr64: case ParsedAttr
::AT_SPtr: case ParsedAttr::AT_UPtr
:
700 // Microsoft type attributes cannot go after the declarator-id.
701 continue;
702
703 NULLABILITY_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_TypeNonNull: case ParsedAttr::AT_TypeNullable
: case ParsedAttr::AT_TypeNullUnspecified
:
704 // Nullability specifiers cannot go after the declarator-id.
705
706 // Objective-C __kindof does not get distributed.
707 case ParsedAttr::AT_ObjCKindOf:
708 continue;
709
710 default:
711 break;
712 }
713 }
714}
715
716/// Add a synthetic '()' to a block-literal declarator if it is
717/// required, given the return type.
718static void maybeSynthesizeBlockSignature(TypeProcessingState &state,
719 QualType declSpecType) {
720 Declarator &declarator = state.getDeclarator();
721
722 // First, check whether the declarator would produce a function,
723 // i.e. whether the innermost semantic chunk is a function.
724 if (declarator.isFunctionDeclarator()) {
725 // If so, make that declarator a prototyped declarator.
726 declarator.getFunctionTypeInfo().hasPrototype = true;
727 return;
728 }
729
730 // If there are any type objects, the type as written won't name a
731 // function, regardless of the decl spec type. This is because a
732 // block signature declarator is always an abstract-declarator, and
733 // abstract-declarators can't just be parentheses chunks. Therefore
734 // we need to build a function chunk unless there are no type
735 // objects and the decl spec type is a function.
736 if (!declarator.getNumTypeObjects() && declSpecType->isFunctionType())
737 return;
738
739 // Note that there *are* cases with invalid declarators where
740 // declarators consist solely of parentheses. In general, these
741 // occur only in failed efforts to make function declarators, so
742 // faking up the function chunk is still the right thing to do.
743
744 // Otherwise, we need to fake up a function declarator.
745 SourceLocation loc = declarator.getBeginLoc();
746
747 // ...and *prepend* it to the declarator.
748 SourceLocation NoLoc;
749 declarator.AddInnermostTypeInfo(DeclaratorChunk::getFunction(
750 /*HasProto=*/true,
751 /*IsAmbiguous=*/false,
752 /*LParenLoc=*/NoLoc,
753 /*ArgInfo=*/nullptr,
754 /*NumParams=*/0,
755 /*EllipsisLoc=*/NoLoc,
756 /*RParenLoc=*/NoLoc,
757 /*RefQualifierIsLvalueRef=*/true,
758 /*RefQualifierLoc=*/NoLoc,
759 /*MutableLoc=*/NoLoc, EST_None,
760 /*ESpecRange=*/SourceRange(),
761 /*Exceptions=*/nullptr,
762 /*ExceptionRanges=*/nullptr,
763 /*NumExceptions=*/0,
764 /*NoexceptExpr=*/nullptr,
765 /*ExceptionSpecTokens=*/nullptr,
766 /*DeclsInPrototype=*/None, loc, loc, declarator));
767
768 // For consistency, make sure the state still has us as processing
769 // the decl spec.
770 assert(state.getCurrentChunkIndex() == declarator.getNumTypeObjects() - 1)((state.getCurrentChunkIndex() == declarator.getNumTypeObjects
() - 1) ? static_cast<void> (0) : __assert_fail ("state.getCurrentChunkIndex() == declarator.getNumTypeObjects() - 1"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 770, __PRETTY_FUNCTION__))
;
771 state.setCurrentChunkIndex(declarator.getNumTypeObjects());
772}
773
774static void diagnoseAndRemoveTypeQualifiers(Sema &S, const DeclSpec &DS,
775 unsigned &TypeQuals,
776 QualType TypeSoFar,
777 unsigned RemoveTQs,
778 unsigned DiagID) {
779 // If this occurs outside a template instantiation, warn the user about
780 // it; they probably didn't mean to specify a redundant qualifier.
781 typedef std::pair<DeclSpec::TQ, SourceLocation> QualLoc;
782 for (QualLoc Qual : {QualLoc(DeclSpec::TQ_const, DS.getConstSpecLoc()),
783 QualLoc(DeclSpec::TQ_restrict, DS.getRestrictSpecLoc()),
784 QualLoc(DeclSpec::TQ_volatile, DS.getVolatileSpecLoc()),
785 QualLoc(DeclSpec::TQ_atomic, DS.getAtomicSpecLoc())}) {
786 if (!(RemoveTQs & Qual.first))
787 continue;
788
789 if (!S.inTemplateInstantiation()) {
790 if (TypeQuals & Qual.first)
791 S.Diag(Qual.second, DiagID)
792 << DeclSpec::getSpecifierName(Qual.first) << TypeSoFar
793 << FixItHint::CreateRemoval(Qual.second);
794 }
795
796 TypeQuals &= ~Qual.first;
797 }
798}
799
800/// Return true if this is omitted block return type. Also check type
801/// attributes and type qualifiers when returning true.
802static bool checkOmittedBlockReturnType(Sema &S, Declarator &declarator,
803 QualType Result) {
804 if (!isOmittedBlockReturnType(declarator))
805 return false;
806
807 // Warn if we see type attributes for omitted return type on a block literal.
808 SmallVector<ParsedAttr *, 2> ToBeRemoved;
809 for (ParsedAttr &AL : declarator.getMutableDeclSpec().getAttributes()) {
810 if (AL.isInvalid() || !AL.isTypeAttr())
811 continue;
812 S.Diag(AL.getLoc(),
813 diag::warn_block_literal_attributes_on_omitted_return_type)
814 << AL;
815 ToBeRemoved.push_back(&AL);
816 }
817 // Remove bad attributes from the list.
818 for (ParsedAttr *AL : ToBeRemoved)
819 declarator.getMutableDeclSpec().getAttributes().remove(AL);
820
821 // Warn if we see type qualifiers for omitted return type on a block literal.
822 const DeclSpec &DS = declarator.getDeclSpec();
823 unsigned TypeQuals = DS.getTypeQualifiers();
824 diagnoseAndRemoveTypeQualifiers(S, DS, TypeQuals, Result, (unsigned)-1,
825 diag::warn_block_literal_qualifiers_on_omitted_return_type);
826 declarator.getMutableDeclSpec().ClearTypeQualifiers();
827
828 return true;
829}
830
831/// Apply Objective-C type arguments to the given type.
832static QualType applyObjCTypeArgs(Sema &S, SourceLocation loc, QualType type,
833 ArrayRef<TypeSourceInfo *> typeArgs,
834 SourceRange typeArgsRange,
835 bool failOnError = false) {
836 // We can only apply type arguments to an Objective-C class type.
837 const auto *objcObjectType = type->getAs<ObjCObjectType>();
838 if (!objcObjectType || !objcObjectType->getInterface()) {
839 S.Diag(loc, diag::err_objc_type_args_non_class)
840 << type
841 << typeArgsRange;
842
843 if (failOnError)
844 return QualType();
845 return type;
846 }
847
848 // The class type must be parameterized.
849 ObjCInterfaceDecl *objcClass = objcObjectType->getInterface();
850 ObjCTypeParamList *typeParams = objcClass->getTypeParamList();
851 if (!typeParams) {
852 S.Diag(loc, diag::err_objc_type_args_non_parameterized_class)
853 << objcClass->getDeclName()
854 << FixItHint::CreateRemoval(typeArgsRange);
855
856 if (failOnError)
857 return QualType();
858
859 return type;
860 }
861
862 // The type must not already be specialized.
863 if (objcObjectType->isSpecialized()) {
864 S.Diag(loc, diag::err_objc_type_args_specialized_class)
865 << type
866 << FixItHint::CreateRemoval(typeArgsRange);
867
868 if (failOnError)
869 return QualType();
870
871 return type;
872 }
873
874 // Check the type arguments.
875 SmallVector<QualType, 4> finalTypeArgs;
876 unsigned numTypeParams = typeParams->size();
877 bool anyPackExpansions = false;
878 for (unsigned i = 0, n = typeArgs.size(); i != n; ++i) {
879 TypeSourceInfo *typeArgInfo = typeArgs[i];
880 QualType typeArg = typeArgInfo->getType();
881
882 // Type arguments cannot have explicit qualifiers or nullability.
883 // We ignore indirect sources of these, e.g. behind typedefs or
884 // template arguments.
885 if (TypeLoc qual = typeArgInfo->getTypeLoc().findExplicitQualifierLoc()) {
886 bool diagnosed = false;
887 SourceRange rangeToRemove;
888 if (auto attr = qual.getAs<AttributedTypeLoc>()) {
889 rangeToRemove = attr.getLocalSourceRange();
890 if (attr.getTypePtr()->getImmediateNullability()) {
891 typeArg = attr.getTypePtr()->getModifiedType();
892 S.Diag(attr.getBeginLoc(),
893 diag::err_objc_type_arg_explicit_nullability)
894 << typeArg << FixItHint::CreateRemoval(rangeToRemove);
895 diagnosed = true;
896 }
897 }
898
899 if (!diagnosed) {
900 S.Diag(qual.getBeginLoc(), diag::err_objc_type_arg_qualified)
901 << typeArg << typeArg.getQualifiers().getAsString()
902 << FixItHint::CreateRemoval(rangeToRemove);
903 }
904 }
905
906 // Remove qualifiers even if they're non-local.
907 typeArg = typeArg.getUnqualifiedType();
908
909 finalTypeArgs.push_back(typeArg);
910
911 if (typeArg->getAs<PackExpansionType>())
912 anyPackExpansions = true;
913
914 // Find the corresponding type parameter, if there is one.
915 ObjCTypeParamDecl *typeParam = nullptr;
916 if (!anyPackExpansions) {
917 if (i < numTypeParams) {
918 typeParam = typeParams->begin()[i];
919 } else {
920 // Too many arguments.
921 S.Diag(loc, diag::err_objc_type_args_wrong_arity)
922 << false
923 << objcClass->getDeclName()
924 << (unsigned)typeArgs.size()
925 << numTypeParams;
926 S.Diag(objcClass->getLocation(), diag::note_previous_decl)
927 << objcClass;
928
929 if (failOnError)
930 return QualType();
931
932 return type;
933 }
934 }
935
936 // Objective-C object pointer types must be substitutable for the bounds.
937 if (const auto *typeArgObjC = typeArg->getAs<ObjCObjectPointerType>()) {
938 // If we don't have a type parameter to match against, assume
939 // everything is fine. There was a prior pack expansion that
940 // means we won't be able to match anything.
941 if (!typeParam) {
942 assert(anyPackExpansions && "Too many arguments?")((anyPackExpansions && "Too many arguments?") ? static_cast
<void> (0) : __assert_fail ("anyPackExpansions && \"Too many arguments?\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 942, __PRETTY_FUNCTION__))
;
943 continue;
944 }
945
946 // Retrieve the bound.
947 QualType bound = typeParam->getUnderlyingType();
948 const auto *boundObjC = bound->getAs<ObjCObjectPointerType>();
949
950 // Determine whether the type argument is substitutable for the bound.
951 if (typeArgObjC->isObjCIdType()) {
952 // When the type argument is 'id', the only acceptable type
953 // parameter bound is 'id'.
954 if (boundObjC->isObjCIdType())
955 continue;
956 } else if (S.Context.canAssignObjCInterfaces(boundObjC, typeArgObjC)) {
957 // Otherwise, we follow the assignability rules.
958 continue;
959 }
960
961 // Diagnose the mismatch.
962 S.Diag(typeArgInfo->getTypeLoc().getBeginLoc(),
963 diag::err_objc_type_arg_does_not_match_bound)
964 << typeArg << bound << typeParam->getDeclName();
965 S.Diag(typeParam->getLocation(), diag::note_objc_type_param_here)
966 << typeParam->getDeclName();
967
968 if (failOnError)
969 return QualType();
970
971 return type;
972 }
973
974 // Block pointer types are permitted for unqualified 'id' bounds.
975 if (typeArg->isBlockPointerType()) {
976 // If we don't have a type parameter to match against, assume
977 // everything is fine. There was a prior pack expansion that
978 // means we won't be able to match anything.
979 if (!typeParam) {
980 assert(anyPackExpansions && "Too many arguments?")((anyPackExpansions && "Too many arguments?") ? static_cast
<void> (0) : __assert_fail ("anyPackExpansions && \"Too many arguments?\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 980, __PRETTY_FUNCTION__))
;
981 continue;
982 }
983
984 // Retrieve the bound.
985 QualType bound = typeParam->getUnderlyingType();
986 if (bound->isBlockCompatibleObjCPointerType(S.Context))
987 continue;
988
989 // Diagnose the mismatch.
990 S.Diag(typeArgInfo->getTypeLoc().getBeginLoc(),
991 diag::err_objc_type_arg_does_not_match_bound)
992 << typeArg << bound << typeParam->getDeclName();
993 S.Diag(typeParam->getLocation(), diag::note_objc_type_param_here)
994 << typeParam->getDeclName();
995
996 if (failOnError)
997 return QualType();
998
999 return type;
1000 }
1001
1002 // Dependent types will be checked at instantiation time.
1003 if (typeArg->isDependentType()) {
1004 continue;
1005 }
1006
1007 // Diagnose non-id-compatible type arguments.
1008 S.Diag(typeArgInfo->getTypeLoc().getBeginLoc(),
1009 diag::err_objc_type_arg_not_id_compatible)
1010 << typeArg << typeArgInfo->getTypeLoc().getSourceRange();
1011
1012 if (failOnError)
1013 return QualType();
1014
1015 return type;
1016 }
1017
1018 // Make sure we didn't have the wrong number of arguments.
1019 if (!anyPackExpansions && finalTypeArgs.size() != numTypeParams) {
1020 S.Diag(loc, diag::err_objc_type_args_wrong_arity)
1021 << (typeArgs.size() < typeParams->size())
1022 << objcClass->getDeclName()
1023 << (unsigned)finalTypeArgs.size()
1024 << (unsigned)numTypeParams;
1025 S.Diag(objcClass->getLocation(), diag::note_previous_decl)
1026 << objcClass;
1027
1028 if (failOnError)
1029 return QualType();
1030
1031 return type;
1032 }
1033
1034 // Success. Form the specialized type.
1035 return S.Context.getObjCObjectType(type, finalTypeArgs, { }, false);
1036}
1037
1038QualType Sema::BuildObjCTypeParamType(const ObjCTypeParamDecl *Decl,
1039 SourceLocation ProtocolLAngleLoc,
1040 ArrayRef<ObjCProtocolDecl *> Protocols,
1041 ArrayRef<SourceLocation> ProtocolLocs,
1042 SourceLocation ProtocolRAngleLoc,
1043 bool FailOnError) {
1044 QualType Result = QualType(Decl->getTypeForDecl(), 0);
1045 if (!Protocols.empty()) {
1046 bool HasError;
1047 Result = Context.applyObjCProtocolQualifiers(Result, Protocols,
1048 HasError);
1049 if (HasError) {
1050 Diag(SourceLocation(), diag::err_invalid_protocol_qualifiers)
1051 << SourceRange(ProtocolLAngleLoc, ProtocolRAngleLoc);
1052 if (FailOnError) Result = QualType();
1053 }
1054 if (FailOnError && Result.isNull())
1055 return QualType();
1056 }
1057
1058 return Result;
1059}
1060
1061QualType Sema::BuildObjCObjectType(QualType BaseType,
1062 SourceLocation Loc,
1063 SourceLocation TypeArgsLAngleLoc,
1064 ArrayRef<TypeSourceInfo *> TypeArgs,
1065 SourceLocation TypeArgsRAngleLoc,
1066 SourceLocation ProtocolLAngleLoc,
1067 ArrayRef<ObjCProtocolDecl *> Protocols,
1068 ArrayRef<SourceLocation> ProtocolLocs,
1069 SourceLocation ProtocolRAngleLoc,
1070 bool FailOnError) {
1071 QualType Result = BaseType;
1072 if (!TypeArgs.empty()) {
1073 Result = applyObjCTypeArgs(*this, Loc, Result, TypeArgs,
1074 SourceRange(TypeArgsLAngleLoc,
1075 TypeArgsRAngleLoc),
1076 FailOnError);
1077 if (FailOnError && Result.isNull())
1078 return QualType();
1079 }
1080
1081 if (!Protocols.empty()) {
1082 bool HasError;
1083 Result = Context.applyObjCProtocolQualifiers(Result, Protocols,
1084 HasError);
1085 if (HasError) {
1086 Diag(Loc, diag::err_invalid_protocol_qualifiers)
1087 << SourceRange(ProtocolLAngleLoc, ProtocolRAngleLoc);
1088 if (FailOnError) Result = QualType();
1089 }
1090 if (FailOnError && Result.isNull())
1091 return QualType();
1092 }
1093
1094 return Result;
1095}
1096
1097TypeResult Sema::actOnObjCProtocolQualifierType(
1098 SourceLocation lAngleLoc,
1099 ArrayRef<Decl *> protocols,
1100 ArrayRef<SourceLocation> protocolLocs,
1101 SourceLocation rAngleLoc) {
1102 // Form id<protocol-list>.
1103 QualType Result = Context.getObjCObjectType(
1104 Context.ObjCBuiltinIdTy, { },
1105 llvm::makeArrayRef(
1106 (ObjCProtocolDecl * const *)protocols.data(),
1107 protocols.size()),
1108 false);
1109 Result = Context.getObjCObjectPointerType(Result);
1110
1111 TypeSourceInfo *ResultTInfo = Context.CreateTypeSourceInfo(Result);
1112 TypeLoc ResultTL = ResultTInfo->getTypeLoc();
1113
1114 auto ObjCObjectPointerTL = ResultTL.castAs<ObjCObjectPointerTypeLoc>();
1115 ObjCObjectPointerTL.setStarLoc(SourceLocation()); // implicit
1116
1117 auto ObjCObjectTL = ObjCObjectPointerTL.getPointeeLoc()
1118 .castAs<ObjCObjectTypeLoc>();
1119 ObjCObjectTL.setHasBaseTypeAsWritten(false);
1120 ObjCObjectTL.getBaseLoc().initialize(Context, SourceLocation());
1121
1122 // No type arguments.
1123 ObjCObjectTL.setTypeArgsLAngleLoc(SourceLocation());
1124 ObjCObjectTL.setTypeArgsRAngleLoc(SourceLocation());
1125
1126 // Fill in protocol qualifiers.
1127 ObjCObjectTL.setProtocolLAngleLoc(lAngleLoc);
1128 ObjCObjectTL.setProtocolRAngleLoc(rAngleLoc);
1129 for (unsigned i = 0, n = protocols.size(); i != n; ++i)
1130 ObjCObjectTL.setProtocolLoc(i, protocolLocs[i]);
1131
1132 // We're done. Return the completed type to the parser.
1133 return CreateParsedType(Result, ResultTInfo);
1134}
1135
1136TypeResult Sema::actOnObjCTypeArgsAndProtocolQualifiers(
1137 Scope *S,
1138 SourceLocation Loc,
1139 ParsedType BaseType,
1140 SourceLocation TypeArgsLAngleLoc,
1141 ArrayRef<ParsedType> TypeArgs,
1142 SourceLocation TypeArgsRAngleLoc,
1143 SourceLocation ProtocolLAngleLoc,
1144 ArrayRef<Decl *> Protocols,
1145 ArrayRef<SourceLocation> ProtocolLocs,
1146 SourceLocation ProtocolRAngleLoc) {
1147 TypeSourceInfo *BaseTypeInfo = nullptr;
1148 QualType T = GetTypeFromParser(BaseType, &BaseTypeInfo);
1149 if (T.isNull())
1150 return true;
1151
1152 // Handle missing type-source info.
1153 if (!BaseTypeInfo)
1154 BaseTypeInfo = Context.getTrivialTypeSourceInfo(T, Loc);
1155
1156 // Extract type arguments.
1157 SmallVector<TypeSourceInfo *, 4> ActualTypeArgInfos;
1158 for (unsigned i = 0, n = TypeArgs.size(); i != n; ++i) {
1159 TypeSourceInfo *TypeArgInfo = nullptr;
1160 QualType TypeArg = GetTypeFromParser(TypeArgs[i], &TypeArgInfo);
1161 if (TypeArg.isNull()) {
1162 ActualTypeArgInfos.clear();
1163 break;
1164 }
1165
1166 assert(TypeArgInfo && "No type source info?")((TypeArgInfo && "No type source info?") ? static_cast
<void> (0) : __assert_fail ("TypeArgInfo && \"No type source info?\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1166, __PRETTY_FUNCTION__))
;
1167 ActualTypeArgInfos.push_back(TypeArgInfo);
1168 }
1169
1170 // Build the object type.
1171 QualType Result = BuildObjCObjectType(
1172 T, BaseTypeInfo->getTypeLoc().getSourceRange().getBegin(),
1173 TypeArgsLAngleLoc, ActualTypeArgInfos, TypeArgsRAngleLoc,
1174 ProtocolLAngleLoc,
1175 llvm::makeArrayRef((ObjCProtocolDecl * const *)Protocols.data(),
1176 Protocols.size()),
1177 ProtocolLocs, ProtocolRAngleLoc,
1178 /*FailOnError=*/false);
1179
1180 if (Result == T)
1181 return BaseType;
1182
1183 // Create source information for this type.
1184 TypeSourceInfo *ResultTInfo = Context.CreateTypeSourceInfo(Result);
1185 TypeLoc ResultTL = ResultTInfo->getTypeLoc();
1186
1187 // For id<Proto1, Proto2> or Class<Proto1, Proto2>, we'll have an
1188 // object pointer type. Fill in source information for it.
1189 if (auto ObjCObjectPointerTL = ResultTL.getAs<ObjCObjectPointerTypeLoc>()) {
1190 // The '*' is implicit.
1191 ObjCObjectPointerTL.setStarLoc(SourceLocation());
1192 ResultTL = ObjCObjectPointerTL.getPointeeLoc();
1193 }
1194
1195 if (auto OTPTL = ResultTL.getAs<ObjCTypeParamTypeLoc>()) {
1196 // Protocol qualifier information.
1197 if (OTPTL.getNumProtocols() > 0) {
1198 assert(OTPTL.getNumProtocols() == Protocols.size())((OTPTL.getNumProtocols() == Protocols.size()) ? static_cast<
void> (0) : __assert_fail ("OTPTL.getNumProtocols() == Protocols.size()"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1198, __PRETTY_FUNCTION__))
;
1199 OTPTL.setProtocolLAngleLoc(ProtocolLAngleLoc);
1200 OTPTL.setProtocolRAngleLoc(ProtocolRAngleLoc);
1201 for (unsigned i = 0, n = Protocols.size(); i != n; ++i)
1202 OTPTL.setProtocolLoc(i, ProtocolLocs[i]);
1203 }
1204
1205 // We're done. Return the completed type to the parser.
1206 return CreateParsedType(Result, ResultTInfo);
1207 }
1208
1209 auto ObjCObjectTL = ResultTL.castAs<ObjCObjectTypeLoc>();
1210
1211 // Type argument information.
1212 if (ObjCObjectTL.getNumTypeArgs() > 0) {
1213 assert(ObjCObjectTL.getNumTypeArgs() == ActualTypeArgInfos.size())((ObjCObjectTL.getNumTypeArgs() == ActualTypeArgInfos.size())
? static_cast<void> (0) : __assert_fail ("ObjCObjectTL.getNumTypeArgs() == ActualTypeArgInfos.size()"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1213, __PRETTY_FUNCTION__))
;
1214 ObjCObjectTL.setTypeArgsLAngleLoc(TypeArgsLAngleLoc);
1215 ObjCObjectTL.setTypeArgsRAngleLoc(TypeArgsRAngleLoc);
1216 for (unsigned i = 0, n = ActualTypeArgInfos.size(); i != n; ++i)
1217 ObjCObjectTL.setTypeArgTInfo(i, ActualTypeArgInfos[i]);
1218 } else {
1219 ObjCObjectTL.setTypeArgsLAngleLoc(SourceLocation());
1220 ObjCObjectTL.setTypeArgsRAngleLoc(SourceLocation());
1221 }
1222
1223 // Protocol qualifier information.
1224 if (ObjCObjectTL.getNumProtocols() > 0) {
1225 assert(ObjCObjectTL.getNumProtocols() == Protocols.size())((ObjCObjectTL.getNumProtocols() == Protocols.size()) ? static_cast
<void> (0) : __assert_fail ("ObjCObjectTL.getNumProtocols() == Protocols.size()"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1225, __PRETTY_FUNCTION__))
;
1226 ObjCObjectTL.setProtocolLAngleLoc(ProtocolLAngleLoc);
1227 ObjCObjectTL.setProtocolRAngleLoc(ProtocolRAngleLoc);
1228 for (unsigned i = 0, n = Protocols.size(); i != n; ++i)
1229 ObjCObjectTL.setProtocolLoc(i, ProtocolLocs[i]);
1230 } else {
1231 ObjCObjectTL.setProtocolLAngleLoc(SourceLocation());
1232 ObjCObjectTL.setProtocolRAngleLoc(SourceLocation());
1233 }
1234
1235 // Base type.
1236 ObjCObjectTL.setHasBaseTypeAsWritten(true);
1237 if (ObjCObjectTL.getType() == T)
1238 ObjCObjectTL.getBaseLoc().initializeFullCopy(BaseTypeInfo->getTypeLoc());
1239 else
1240 ObjCObjectTL.getBaseLoc().initialize(Context, Loc);
1241
1242 // We're done. Return the completed type to the parser.
1243 return CreateParsedType(Result, ResultTInfo);
1244}
1245
1246static OpenCLAccessAttr::Spelling
1247getImageAccess(const ParsedAttributesView &Attrs) {
1248 for (const ParsedAttr &AL : Attrs)
1249 if (AL.getKind() == ParsedAttr::AT_OpenCLAccess)
1250 return static_cast<OpenCLAccessAttr::Spelling>(AL.getSemanticSpelling());
1251 return OpenCLAccessAttr::Keyword_read_only;
1252}
1253
1254/// Convert the specified declspec to the appropriate type
1255/// object.
1256/// \param state Specifies the declarator containing the declaration specifier
1257/// to be converted, along with other associated processing state.
1258/// \returns The type described by the declaration specifiers. This function
1259/// never returns null.
1260static QualType ConvertDeclSpecToType(TypeProcessingState &state) {
1261 // FIXME: Should move the logic from DeclSpec::Finish to here for validity
1262 // checking.
1263
1264 Sema &S = state.getSema();
1265 Declarator &declarator = state.getDeclarator();
1266 DeclSpec &DS = declarator.getMutableDeclSpec();
1267 SourceLocation DeclLoc = declarator.getIdentifierLoc();
1268 if (DeclLoc.isInvalid())
1269 DeclLoc = DS.getBeginLoc();
1270
1271 ASTContext &Context = S.Context;
1272
1273 QualType Result;
1274 switch (DS.getTypeSpecType()) {
1275 case DeclSpec::TST_void:
1276 Result = Context.VoidTy;
1277 break;
1278 case DeclSpec::TST_char:
1279 if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified)
1280 Result = Context.CharTy;
1281 else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed)
1282 Result = Context.SignedCharTy;
1283 else {
1284 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned &&((DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && "Unknown TSS value"
) ? static_cast<void> (0) : __assert_fail ("DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && \"Unknown TSS value\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1285, __PRETTY_FUNCTION__))
1285 "Unknown TSS value")((DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && "Unknown TSS value"
) ? static_cast<void> (0) : __assert_fail ("DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && \"Unknown TSS value\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1285, __PRETTY_FUNCTION__))
;
1286 Result = Context.UnsignedCharTy;
1287 }
1288 break;
1289 case DeclSpec::TST_wchar:
1290 if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified)
1291 Result = Context.WCharTy;
1292 else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed) {
1293 S.Diag(DS.getTypeSpecSignLoc(), diag::ext_wchar_t_sign_spec)
1294 << DS.getSpecifierName(DS.getTypeSpecType(),
1295 Context.getPrintingPolicy());
1296 Result = Context.getSignedWCharType();
1297 } else {
1298 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned &&((DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && "Unknown TSS value"
) ? static_cast<void> (0) : __assert_fail ("DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && \"Unknown TSS value\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1299, __PRETTY_FUNCTION__))
1299 "Unknown TSS value")((DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && "Unknown TSS value"
) ? static_cast<void> (0) : __assert_fail ("DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && \"Unknown TSS value\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1299, __PRETTY_FUNCTION__))
;
1300 S.Diag(DS.getTypeSpecSignLoc(), diag::ext_wchar_t_sign_spec)
1301 << DS.getSpecifierName(DS.getTypeSpecType(),
1302 Context.getPrintingPolicy());
1303 Result = Context.getUnsignedWCharType();
1304 }
1305 break;
1306 case DeclSpec::TST_char8:
1307 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unspecified &&((DS.getTypeSpecSign() == DeclSpec::TSS_unspecified &&
"Unknown TSS value") ? static_cast<void> (0) : __assert_fail
("DS.getTypeSpecSign() == DeclSpec::TSS_unspecified && \"Unknown TSS value\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1308, __PRETTY_FUNCTION__))
1308 "Unknown TSS value")((DS.getTypeSpecSign() == DeclSpec::TSS_unspecified &&
"Unknown TSS value") ? static_cast<void> (0) : __assert_fail
("DS.getTypeSpecSign() == DeclSpec::TSS_unspecified && \"Unknown TSS value\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1308, __PRETTY_FUNCTION__))
;
1309 Result = Context.Char8Ty;
1310 break;
1311 case DeclSpec::TST_char16:
1312 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unspecified &&((DS.getTypeSpecSign() == DeclSpec::TSS_unspecified &&
"Unknown TSS value") ? static_cast<void> (0) : __assert_fail
("DS.getTypeSpecSign() == DeclSpec::TSS_unspecified && \"Unknown TSS value\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1313, __PRETTY_FUNCTION__))
1313 "Unknown TSS value")((DS.getTypeSpecSign() == DeclSpec::TSS_unspecified &&
"Unknown TSS value") ? static_cast<void> (0) : __assert_fail
("DS.getTypeSpecSign() == DeclSpec::TSS_unspecified && \"Unknown TSS value\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1313, __PRETTY_FUNCTION__))
;
1314 Result = Context.Char16Ty;
1315 break;
1316 case DeclSpec::TST_char32:
1317 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unspecified &&((DS.getTypeSpecSign() == DeclSpec::TSS_unspecified &&
"Unknown TSS value") ? static_cast<void> (0) : __assert_fail
("DS.getTypeSpecSign() == DeclSpec::TSS_unspecified && \"Unknown TSS value\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1318, __PRETTY_FUNCTION__))
1318 "Unknown TSS value")((DS.getTypeSpecSign() == DeclSpec::TSS_unspecified &&
"Unknown TSS value") ? static_cast<void> (0) : __assert_fail
("DS.getTypeSpecSign() == DeclSpec::TSS_unspecified && \"Unknown TSS value\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1318, __PRETTY_FUNCTION__))
;
1319 Result = Context.Char32Ty;
1320 break;
1321 case DeclSpec::TST_unspecified:
1322 // If this is a missing declspec in a block literal return context, then it
1323 // is inferred from the return statements inside the block.
1324 // The declspec is always missing in a lambda expr context; it is either
1325 // specified with a trailing return type or inferred.
1326 if (S.getLangOpts().CPlusPlus14 &&
1327 declarator.getContext() == DeclaratorContext::LambdaExprContext) {
1328 // In C++1y, a lambda's implicit return type is 'auto'.
1329 Result = Context.getAutoDeductType();
1330 break;
1331 } else if (declarator.getContext() ==
1332 DeclaratorContext::LambdaExprContext ||
1333 checkOmittedBlockReturnType(S, declarator,
1334 Context.DependentTy)) {
1335 Result = Context.DependentTy;
1336 break;
1337 }
1338
1339 // Unspecified typespec defaults to int in C90. However, the C90 grammar
1340 // [C90 6.5] only allows a decl-spec if there was *some* type-specifier,
1341 // type-qualifier, or storage-class-specifier. If not, emit an extwarn.
1342 // Note that the one exception to this is function definitions, which are
1343 // allowed to be completely missing a declspec. This is handled in the
1344 // parser already though by it pretending to have seen an 'int' in this
1345 // case.
1346 if (S.getLangOpts().ImplicitInt) {
1347 // In C89 mode, we only warn if there is a completely missing declspec
1348 // when one is not allowed.
1349 if (DS.isEmpty()) {
1350 S.Diag(DeclLoc, diag::ext_missing_declspec)
1351 << DS.getSourceRange()
1352 << FixItHint::CreateInsertion(DS.getBeginLoc(), "int");
1353 }
1354 } else if (!DS.hasTypeSpecifier()) {
1355 // C99 and C++ require a type specifier. For example, C99 6.7.2p2 says:
1356 // "At least one type specifier shall be given in the declaration
1357 // specifiers in each declaration, and in the specifier-qualifier list in
1358 // each struct declaration and type name."
1359 if (S.getLangOpts().CPlusPlus && !DS.isTypeSpecPipe()) {
1360 S.Diag(DeclLoc, diag::err_missing_type_specifier)
1361 << DS.getSourceRange();
1362
1363 // When this occurs in C++ code, often something is very broken with the
1364 // value being declared, poison it as invalid so we don't get chains of
1365 // errors.
1366 declarator.setInvalidType(true);
1367 } else if ((S.getLangOpts().OpenCLVersion >= 200 ||
1368 S.getLangOpts().OpenCLCPlusPlus) &&
1369 DS.isTypeSpecPipe()) {
1370 S.Diag(DeclLoc, diag::err_missing_actual_pipe_type)
1371 << DS.getSourceRange();
1372 declarator.setInvalidType(true);
1373 } else {
1374 S.Diag(DeclLoc, diag::ext_missing_type_specifier)
1375 << DS.getSourceRange();
1376 }
1377 }
1378
1379 LLVM_FALLTHROUGH[[gnu::fallthrough]];
1380 case DeclSpec::TST_int: {
1381 if (DS.getTypeSpecSign() != DeclSpec::TSS_unsigned) {
1382 switch (DS.getTypeSpecWidth()) {
1383 case DeclSpec::TSW_unspecified: Result = Context.IntTy; break;
1384 case DeclSpec::TSW_short: Result = Context.ShortTy; break;
1385 case DeclSpec::TSW_long: Result = Context.LongTy; break;
1386 case DeclSpec::TSW_longlong:
1387 Result = Context.LongLongTy;
1388
1389 // 'long long' is a C99 or C++11 feature.
1390 if (!S.getLangOpts().C99) {
1391 if (S.getLangOpts().CPlusPlus)
1392 S.Diag(DS.getTypeSpecWidthLoc(),
1393 S.getLangOpts().CPlusPlus11 ?
1394 diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong);
1395 else
1396 S.Diag(DS.getTypeSpecWidthLoc(), diag::ext_c99_longlong);
1397 }
1398 break;
1399 }
1400 } else {
1401 switch (DS.getTypeSpecWidth()) {
1402 case DeclSpec::TSW_unspecified: Result = Context.UnsignedIntTy; break;
1403 case DeclSpec::TSW_short: Result = Context.UnsignedShortTy; break;
1404 case DeclSpec::TSW_long: Result = Context.UnsignedLongTy; break;
1405 case DeclSpec::TSW_longlong:
1406 Result = Context.UnsignedLongLongTy;
1407
1408 // 'long long' is a C99 or C++11 feature.
1409 if (!S.getLangOpts().C99) {
1410 if (S.getLangOpts().CPlusPlus)
1411 S.Diag(DS.getTypeSpecWidthLoc(),
1412 S.getLangOpts().CPlusPlus11 ?
1413 diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong);
1414 else
1415 S.Diag(DS.getTypeSpecWidthLoc(), diag::ext_c99_longlong);
1416 }
1417 break;
1418 }
1419 }
1420 break;
1421 }
1422 case DeclSpec::TST_accum: {
1423 switch (DS.getTypeSpecWidth()) {
1424 case DeclSpec::TSW_short:
1425 Result = Context.ShortAccumTy;
1426 break;
1427 case DeclSpec::TSW_unspecified:
1428 Result = Context.AccumTy;
1429 break;
1430 case DeclSpec::TSW_long:
1431 Result = Context.LongAccumTy;
1432 break;
1433 case DeclSpec::TSW_longlong:
1434 llvm_unreachable("Unable to specify long long as _Accum width")::llvm::llvm_unreachable_internal("Unable to specify long long as _Accum width"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1434)
;
1435 }
1436
1437 if (DS.getTypeSpecSign() == DeclSpec::TSS_unsigned)
1438 Result = Context.getCorrespondingUnsignedType(Result);
1439
1440 if (DS.isTypeSpecSat())
1441 Result = Context.getCorrespondingSaturatedType(Result);
1442
1443 break;
1444 }
1445 case DeclSpec::TST_fract: {
1446 switch (DS.getTypeSpecWidth()) {
1447 case DeclSpec::TSW_short:
1448 Result = Context.ShortFractTy;
1449 break;
1450 case DeclSpec::TSW_unspecified:
1451 Result = Context.FractTy;
1452 break;
1453 case DeclSpec::TSW_long:
1454 Result = Context.LongFractTy;
1455 break;
1456 case DeclSpec::TSW_longlong:
1457 llvm_unreachable("Unable to specify long long as _Fract width")::llvm::llvm_unreachable_internal("Unable to specify long long as _Fract width"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1457)
;
1458 }
1459
1460 if (DS.getTypeSpecSign() == DeclSpec::TSS_unsigned)
1461 Result = Context.getCorrespondingUnsignedType(Result);
1462
1463 if (DS.isTypeSpecSat())
1464 Result = Context.getCorrespondingSaturatedType(Result);
1465
1466 break;
1467 }
1468 case DeclSpec::TST_int128:
1469 if (!S.Context.getTargetInfo().hasInt128Type() &&
1470 !(S.getLangOpts().OpenMP && S.getLangOpts().OpenMPIsDevice))
1471 S.Diag(DS.getTypeSpecTypeLoc(), diag::err_type_unsupported)
1472 << "__int128";
1473 if (DS.getTypeSpecSign() == DeclSpec::TSS_unsigned)
1474 Result = Context.UnsignedInt128Ty;
1475 else
1476 Result = Context.Int128Ty;
1477 break;
1478 case DeclSpec::TST_float16:
1479 // CUDA host and device may have different _Float16 support, therefore
1480 // do not diagnose _Float16 usage to avoid false alarm.
1481 // ToDo: more precise diagnostics for CUDA.
1482 if (!S.Context.getTargetInfo().hasFloat16Type() && !S.getLangOpts().CUDA &&
1483 !(S.getLangOpts().OpenMP && S.getLangOpts().OpenMPIsDevice))
1484 S.Diag(DS.getTypeSpecTypeLoc(), diag::err_type_unsupported)
1485 << "_Float16";
1486 Result = Context.Float16Ty;
1487 break;
1488 case DeclSpec::TST_half: Result = Context.HalfTy; break;
1489 case DeclSpec::TST_float: Result = Context.FloatTy; break;
1490 case DeclSpec::TST_double:
1491 if (DS.getTypeSpecWidth() == DeclSpec::TSW_long)
1492 Result = Context.LongDoubleTy;
1493 else
1494 Result = Context.DoubleTy;
1495 break;
1496 case DeclSpec::TST_float128:
1497 if (!S.Context.getTargetInfo().hasFloat128Type() &&
1498 !(S.getLangOpts().OpenMP && S.getLangOpts().OpenMPIsDevice))
1499 S.Diag(DS.getTypeSpecTypeLoc(), diag::err_type_unsupported)
1500 << "__float128";
1501 Result = Context.Float128Ty;
1502 break;
1503 case DeclSpec::TST_bool: Result = Context.BoolTy; break; // _Bool or bool
1504 break;
1505 case DeclSpec::TST_decimal32: // _Decimal32
1506 case DeclSpec::TST_decimal64: // _Decimal64
1507 case DeclSpec::TST_decimal128: // _Decimal128
1508 S.Diag(DS.getTypeSpecTypeLoc(), diag::err_decimal_unsupported);
1509 Result = Context.IntTy;
1510 declarator.setInvalidType(true);
1511 break;
1512 case DeclSpec::TST_class:
1513 case DeclSpec::TST_enum:
1514 case DeclSpec::TST_union:
1515 case DeclSpec::TST_struct:
1516 case DeclSpec::TST_interface: {
1517 TagDecl *D = dyn_cast_or_null<TagDecl>(DS.getRepAsDecl());
1518 if (!D) {
1519 // This can happen in C++ with ambiguous lookups.
1520 Result = Context.IntTy;
1521 declarator.setInvalidType(true);
1522 break;
1523 }
1524
1525 // If the type is deprecated or unavailable, diagnose it.
1526 S.DiagnoseUseOfDecl(D, DS.getTypeSpecTypeNameLoc());
1527
1528 assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 &&((DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex
() == 0 && DS.getTypeSpecSign() == 0 && "No qualifiers on tag names!"
) ? static_cast<void> (0) : __assert_fail ("DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == 0 && \"No qualifiers on tag names!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1529, __PRETTY_FUNCTION__))
1529 DS.getTypeSpecSign() == 0 && "No qualifiers on tag names!")((DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex
() == 0 && DS.getTypeSpecSign() == 0 && "No qualifiers on tag names!"
) ? static_cast<void> (0) : __assert_fail ("DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == 0 && \"No qualifiers on tag names!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1529, __PRETTY_FUNCTION__))
;
1530
1531 // TypeQuals handled by caller.
1532 Result = Context.getTypeDeclType(D);
1533
1534 // In both C and C++, make an ElaboratedType.
1535 ElaboratedTypeKeyword Keyword
1536 = ElaboratedType::getKeywordForTypeSpec(DS.getTypeSpecType());
1537 Result = S.getElaboratedType(Keyword, DS.getTypeSpecScope(), Result,
1538 DS.isTypeSpecOwned() ? D : nullptr);
1539 break;
1540 }
1541 case DeclSpec::TST_typename: {
1542 assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 &&((DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex
() == 0 && DS.getTypeSpecSign() == 0 && "Can't handle qualifiers on typedef names yet!"
) ? static_cast<void> (0) : __assert_fail ("DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == 0 && \"Can't handle qualifiers on typedef names yet!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1544, __PRETTY_FUNCTION__))
1543 DS.getTypeSpecSign() == 0 &&((DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex
() == 0 && DS.getTypeSpecSign() == 0 && "Can't handle qualifiers on typedef names yet!"
) ? static_cast<void> (0) : __assert_fail ("DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == 0 && \"Can't handle qualifiers on typedef names yet!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1544, __PRETTY_FUNCTION__))
1544 "Can't handle qualifiers on typedef names yet!")((DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex
() == 0 && DS.getTypeSpecSign() == 0 && "Can't handle qualifiers on typedef names yet!"
) ? static_cast<void> (0) : __assert_fail ("DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == 0 && \"Can't handle qualifiers on typedef names yet!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1544, __PRETTY_FUNCTION__))
;
1545 Result = S.GetTypeFromParser(DS.getRepAsType());
1546 if (Result.isNull()) {
1547 declarator.setInvalidType(true);
1548 }
1549
1550 // TypeQuals handled by caller.
1551 break;
1552 }
1553 case DeclSpec::TST_typeofType:
1554 // FIXME: Preserve type source info.
1555 Result = S.GetTypeFromParser(DS.getRepAsType());
1556 assert(!Result.isNull() && "Didn't get a type for typeof?")((!Result.isNull() && "Didn't get a type for typeof?"
) ? static_cast<void> (0) : __assert_fail ("!Result.isNull() && \"Didn't get a type for typeof?\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1556, __PRETTY_FUNCTION__))
;
1557 if (!Result->isDependentType())
1558 if (const TagType *TT = Result->getAs<TagType>())
1559 S.DiagnoseUseOfDecl(TT->getDecl(), DS.getTypeSpecTypeLoc());
1560 // TypeQuals handled by caller.
1561 Result = Context.getTypeOfType(Result);
1562 break;
1563 case DeclSpec::TST_typeofExpr: {
1564 Expr *E = DS.getRepAsExpr();
1565 assert(E && "Didn't get an expression for typeof?")((E && "Didn't get an expression for typeof?") ? static_cast
<void> (0) : __assert_fail ("E && \"Didn't get an expression for typeof?\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1565, __PRETTY_FUNCTION__))
;
1566 // TypeQuals handled by caller.
1567 Result = S.BuildTypeofExprType(E, DS.getTypeSpecTypeLoc());
1568 if (Result.isNull()) {
1569 Result = Context.IntTy;
1570 declarator.setInvalidType(true);
1571 }
1572 break;
1573 }
1574 case DeclSpec::TST_decltype: {
1575 Expr *E = DS.getRepAsExpr();
1576 assert(E && "Didn't get an expression for decltype?")((E && "Didn't get an expression for decltype?") ? static_cast
<void> (0) : __assert_fail ("E && \"Didn't get an expression for decltype?\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1576, __PRETTY_FUNCTION__))
;
1577 // TypeQuals handled by caller.
1578 Result = S.BuildDecltypeType(E, DS.getTypeSpecTypeLoc());
1579 if (Result.isNull()) {
1580 Result = Context.IntTy;
1581 declarator.setInvalidType(true);
1582 }
1583 break;
1584 }
1585 case DeclSpec::TST_underlyingType:
1586 Result = S.GetTypeFromParser(DS.getRepAsType());
1587 assert(!Result.isNull() && "Didn't get a type for __underlying_type?")((!Result.isNull() && "Didn't get a type for __underlying_type?"
) ? static_cast<void> (0) : __assert_fail ("!Result.isNull() && \"Didn't get a type for __underlying_type?\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1587, __PRETTY_FUNCTION__))
;
1588 Result = S.BuildUnaryTransformType(Result,
1589 UnaryTransformType::EnumUnderlyingType,
1590 DS.getTypeSpecTypeLoc());
1591 if (Result.isNull()) {
1592 Result = Context.IntTy;
1593 declarator.setInvalidType(true);
1594 }
1595 break;
1596
1597 case DeclSpec::TST_auto:
1598 Result = Context.getAutoType(QualType(), AutoTypeKeyword::Auto, false);
1599 break;
1600
1601 case DeclSpec::TST_auto_type:
1602 Result = Context.getAutoType(QualType(), AutoTypeKeyword::GNUAutoType, false);
1603 break;
1604
1605 case DeclSpec::TST_decltype_auto:
1606 Result = Context.getAutoType(QualType(), AutoTypeKeyword::DecltypeAuto,
1607 /*IsDependent*/ false);
1608 break;
1609
1610 case DeclSpec::TST_unknown_anytype:
1611 Result = Context.UnknownAnyTy;
1612 break;
1613
1614 case DeclSpec::TST_atomic:
1615 Result = S.GetTypeFromParser(DS.getRepAsType());
1616 assert(!Result.isNull() && "Didn't get a type for _Atomic?")((!Result.isNull() && "Didn't get a type for _Atomic?"
) ? static_cast<void> (0) : __assert_fail ("!Result.isNull() && \"Didn't get a type for _Atomic?\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1616, __PRETTY_FUNCTION__))
;
1617 Result = S.BuildAtomicType(Result, DS.getTypeSpecTypeLoc());
1618 if (Result.isNull()) {
1619 Result = Context.IntTy;
1620 declarator.setInvalidType(true);
1621 }
1622 break;
1623
1624#define GENERIC_IMAGE_TYPE(ImgType, Id) \
1625 case DeclSpec::TST_##ImgType##_t: \
1626 switch (getImageAccess(DS.getAttributes())) { \
1627 case OpenCLAccessAttr::Keyword_write_only: \
1628 Result = Context.Id##WOTy; \
1629 break; \
1630 case OpenCLAccessAttr::Keyword_read_write: \
1631 Result = Context.Id##RWTy; \
1632 break; \
1633 case OpenCLAccessAttr::Keyword_read_only: \
1634 Result = Context.Id##ROTy; \
1635 break; \
1636 case OpenCLAccessAttr::SpellingNotCalculated: \
1637 llvm_unreachable("Spelling not yet calculated")::llvm::llvm_unreachable_internal("Spelling not yet calculated"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1637)
; \
1638 } \
1639 break;
1640#include "clang/Basic/OpenCLImageTypes.def"
1641
1642 case DeclSpec::TST_error:
1643 Result = Context.IntTy;
1644 declarator.setInvalidType(true);
1645 break;
1646 }
1647
1648 if (S.getLangOpts().OpenCL &&
1649 S.checkOpenCLDisabledTypeDeclSpec(DS, Result))
1650 declarator.setInvalidType(true);
1651
1652 bool IsFixedPointType = DS.getTypeSpecType() == DeclSpec::TST_accum ||
1653 DS.getTypeSpecType() == DeclSpec::TST_fract;
1654
1655 // Only fixed point types can be saturated
1656 if (DS.isTypeSpecSat() && !IsFixedPointType)
1657 S.Diag(DS.getTypeSpecSatLoc(), diag::err_invalid_saturation_spec)
1658 << DS.getSpecifierName(DS.getTypeSpecType(),
1659 Context.getPrintingPolicy());
1660
1661 // Handle complex types.
1662 if (DS.getTypeSpecComplex() == DeclSpec::TSC_complex) {
1663 if (S.getLangOpts().Freestanding)
1664 S.Diag(DS.getTypeSpecComplexLoc(), diag::ext_freestanding_complex);
1665 Result = Context.getComplexType(Result);
1666 } else if (DS.isTypeAltiVecVector()) {
1667 unsigned typeSize = static_cast<unsigned>(Context.getTypeSize(Result));
1668 assert(typeSize > 0 && "type size for vector must be greater than 0 bits")((typeSize > 0 && "type size for vector must be greater than 0 bits"
) ? static_cast<void> (0) : __assert_fail ("typeSize > 0 && \"type size for vector must be greater than 0 bits\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1668, __PRETTY_FUNCTION__))
;
1669 VectorType::VectorKind VecKind = VectorType::AltiVecVector;
1670 if (DS.isTypeAltiVecPixel())
1671 VecKind = VectorType::AltiVecPixel;
1672 else if (DS.isTypeAltiVecBool())
1673 VecKind = VectorType::AltiVecBool;
1674 Result = Context.getVectorType(Result, 128/typeSize, VecKind);
1675 }
1676
1677 // FIXME: Imaginary.
1678 if (DS.getTypeSpecComplex() == DeclSpec::TSC_imaginary)
1679 S.Diag(DS.getTypeSpecComplexLoc(), diag::err_imaginary_not_supported);
1680
1681 // Before we process any type attributes, synthesize a block literal
1682 // function declarator if necessary.
1683 if (declarator.getContext() == DeclaratorContext::BlockLiteralContext)
1684 maybeSynthesizeBlockSignature(state, Result);
1685
1686 // Apply any type attributes from the decl spec. This may cause the
1687 // list of type attributes to be temporarily saved while the type
1688 // attributes are pushed around.
1689 // pipe attributes will be handled later ( at GetFullTypeForDeclarator )
1690 if (!DS.isTypeSpecPipe())
1691 processTypeAttrs(state, Result, TAL_DeclSpec, DS.getAttributes());
1692
1693 // Apply const/volatile/restrict qualifiers to T.
1694 if (unsigned TypeQuals = DS.getTypeQualifiers()) {
1695 // Warn about CV qualifiers on function types.
1696 // C99 6.7.3p8:
1697 // If the specification of a function type includes any type qualifiers,
1698 // the behavior is undefined.
1699 // C++11 [dcl.fct]p7:
1700 // The effect of a cv-qualifier-seq in a function declarator is not the
1701 // same as adding cv-qualification on top of the function type. In the
1702 // latter case, the cv-qualifiers are ignored.
1703 if (TypeQuals && Result->isFunctionType()) {
1704 diagnoseAndRemoveTypeQualifiers(
1705 S, DS, TypeQuals, Result, DeclSpec::TQ_const | DeclSpec::TQ_volatile,
1706 S.getLangOpts().CPlusPlus
1707 ? diag::warn_typecheck_function_qualifiers_ignored
1708 : diag::warn_typecheck_function_qualifiers_unspecified);
1709 // No diagnostic for 'restrict' or '_Atomic' applied to a
1710 // function type; we'll diagnose those later, in BuildQualifiedType.
1711 }
1712
1713 // C++11 [dcl.ref]p1:
1714 // Cv-qualified references are ill-formed except when the
1715 // cv-qualifiers are introduced through the use of a typedef-name
1716 // or decltype-specifier, in which case the cv-qualifiers are ignored.
1717 //
1718 // There don't appear to be any other contexts in which a cv-qualified
1719 // reference type could be formed, so the 'ill-formed' clause here appears
1720 // to never happen.
1721 if (TypeQuals && Result->isReferenceType()) {
1722 diagnoseAndRemoveTypeQualifiers(
1723 S, DS, TypeQuals, Result,
1724 DeclSpec::TQ_const | DeclSpec::TQ_volatile | DeclSpec::TQ_atomic,
1725 diag::warn_typecheck_reference_qualifiers);
1726 }
1727
1728 // C90 6.5.3 constraints: "The same type qualifier shall not appear more
1729 // than once in the same specifier-list or qualifier-list, either directly
1730 // or via one or more typedefs."
1731 if (!S.getLangOpts().C99 && !S.getLangOpts().CPlusPlus
1732 && TypeQuals & Result.getCVRQualifiers()) {
1733 if (TypeQuals & DeclSpec::TQ_const && Result.isConstQualified()) {
1734 S.Diag(DS.getConstSpecLoc(), diag::ext_duplicate_declspec)
1735 << "const";
1736 }
1737
1738 if (TypeQuals & DeclSpec::TQ_volatile && Result.isVolatileQualified()) {
1739 S.Diag(DS.getVolatileSpecLoc(), diag::ext_duplicate_declspec)
1740 << "volatile";
1741 }
1742
1743 // C90 doesn't have restrict nor _Atomic, so it doesn't force us to
1744 // produce a warning in this case.
1745 }
1746
1747 QualType Qualified = S.BuildQualifiedType(Result, DeclLoc, TypeQuals, &DS);
1748
1749 // If adding qualifiers fails, just use the unqualified type.
1750 if (Qualified.isNull())
1751 declarator.setInvalidType(true);
1752 else
1753 Result = Qualified;
1754 }
1755
1756 assert(!Result.isNull() && "This function should not return a null type")((!Result.isNull() && "This function should not return a null type"
) ? static_cast<void> (0) : __assert_fail ("!Result.isNull() && \"This function should not return a null type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1756, __PRETTY_FUNCTION__))
;
1757 return Result;
1758}
1759
1760static std::string getPrintableNameForEntity(DeclarationName Entity) {
1761 if (Entity)
1762 return Entity.getAsString();
1763
1764 return "type name";
1765}
1766
1767QualType Sema::BuildQualifiedType(QualType T, SourceLocation Loc,
1768 Qualifiers Qs, const DeclSpec *DS) {
1769 if (T.isNull())
1770 return QualType();
1771
1772 // Ignore any attempt to form a cv-qualified reference.
1773 if (T->isReferenceType()) {
1774 Qs.removeConst();
1775 Qs.removeVolatile();
1776 }
1777
1778 // Enforce C99 6.7.3p2: "Types other than pointer types derived from
1779 // object or incomplete types shall not be restrict-qualified."
1780 if (Qs.hasRestrict()) {
1781 unsigned DiagID = 0;
1782 QualType ProblemTy;
1783
1784 if (T->isAnyPointerType() || T->isReferenceType() ||
1785 T->isMemberPointerType()) {
1786 QualType EltTy;
1787 if (T->isObjCObjectPointerType())
1788 EltTy = T;
1789 else if (const MemberPointerType *PTy = T->getAs<MemberPointerType>())
1790 EltTy = PTy->getPointeeType();
1791 else
1792 EltTy = T->getPointeeType();
1793
1794 // If we have a pointer or reference, the pointee must have an object
1795 // incomplete type.
1796 if (!EltTy->isIncompleteOrObjectType()) {
1797 DiagID = diag::err_typecheck_invalid_restrict_invalid_pointee;
1798 ProblemTy = EltTy;
1799 }
1800 } else if (!T->isDependentType()) {
1801 DiagID = diag::err_typecheck_invalid_restrict_not_pointer;
1802 ProblemTy = T;
1803 }
1804
1805 if (DiagID) {
1806 Diag(DS ? DS->getRestrictSpecLoc() : Loc, DiagID) << ProblemTy;
1807 Qs.removeRestrict();
1808 }
1809 }
1810
1811 return Context.getQualifiedType(T, Qs);
1812}
1813
1814QualType Sema::BuildQualifiedType(QualType T, SourceLocation Loc,
1815 unsigned CVRAU, const DeclSpec *DS) {
1816 if (T.isNull())
1817 return QualType();
1818
1819 // Ignore any attempt to form a cv-qualified reference.
1820 if (T->isReferenceType())
1821 CVRAU &=
1822 ~(DeclSpec::TQ_const | DeclSpec::TQ_volatile | DeclSpec::TQ_atomic);
1823
1824 // Convert from DeclSpec::TQ to Qualifiers::TQ by just dropping TQ_atomic and
1825 // TQ_unaligned;
1826 unsigned CVR = CVRAU & ~(DeclSpec::TQ_atomic | DeclSpec::TQ_unaligned);
1827
1828 // C11 6.7.3/5:
1829 // If the same qualifier appears more than once in the same
1830 // specifier-qualifier-list, either directly or via one or more typedefs,
1831 // the behavior is the same as if it appeared only once.
1832 //
1833 // It's not specified what happens when the _Atomic qualifier is applied to
1834 // a type specified with the _Atomic specifier, but we assume that this
1835 // should be treated as if the _Atomic qualifier appeared multiple times.
1836 if (CVRAU & DeclSpec::TQ_atomic && !T->isAtomicType()) {
1837 // C11 6.7.3/5:
1838 // If other qualifiers appear along with the _Atomic qualifier in a
1839 // specifier-qualifier-list, the resulting type is the so-qualified
1840 // atomic type.
1841 //
1842 // Don't need to worry about array types here, since _Atomic can't be
1843 // applied to such types.
1844 SplitQualType Split = T.getSplitUnqualifiedType();
1845 T = BuildAtomicType(QualType(Split.Ty, 0),
1846 DS ? DS->getAtomicSpecLoc() : Loc);
1847 if (T.isNull())
1848 return T;
1849 Split.Quals.addCVRQualifiers(CVR);
1850 return BuildQualifiedType(T, Loc, Split.Quals);
1851 }
1852
1853 Qualifiers Q = Qualifiers::fromCVRMask(CVR);
1854 Q.setUnaligned(CVRAU & DeclSpec::TQ_unaligned);
1855 return BuildQualifiedType(T, Loc, Q, DS);
1856}
1857
1858/// Build a paren type including \p T.
1859QualType Sema::BuildParenType(QualType T) {
1860 return Context.getParenType(T);
1861}
1862
1863/// Given that we're building a pointer or reference to the given
1864static QualType inferARCLifetimeForPointee(Sema &S, QualType type,
1865 SourceLocation loc,
1866 bool isReference) {
1867 // Bail out if retention is unrequired or already specified.
1868 if (!type->isObjCLifetimeType() ||
1869 type.getObjCLifetime() != Qualifiers::OCL_None)
1870 return type;
1871
1872 Qualifiers::ObjCLifetime implicitLifetime = Qualifiers::OCL_None;
1873
1874 // If the object type is const-qualified, we can safely use
1875 // __unsafe_unretained. This is safe (because there are no read
1876 // barriers), and it'll be safe to coerce anything but __weak* to
1877 // the resulting type.
1878 if (type.isConstQualified()) {
1879 implicitLifetime = Qualifiers::OCL_ExplicitNone;
1880
1881 // Otherwise, check whether the static type does not require
1882 // retaining. This currently only triggers for Class (possibly
1883 // protocol-qualifed, and arrays thereof).
1884 } else if (type->isObjCARCImplicitlyUnretainedType()) {
1885 implicitLifetime = Qualifiers::OCL_ExplicitNone;
1886
1887 // If we are in an unevaluated context, like sizeof, skip adding a
1888 // qualification.
1889 } else if (S.isUnevaluatedContext()) {
1890 return type;
1891
1892 // If that failed, give an error and recover using __strong. __strong
1893 // is the option most likely to prevent spurious second-order diagnostics,
1894 // like when binding a reference to a field.
1895 } else {
1896 // These types can show up in private ivars in system headers, so
1897 // we need this to not be an error in those cases. Instead we
1898 // want to delay.
1899 if (S.DelayedDiagnostics.shouldDelayDiagnostics()) {
1900 S.DelayedDiagnostics.add(
1901 sema::DelayedDiagnostic::makeForbiddenType(loc,
1902 diag::err_arc_indirect_no_ownership, type, isReference));
1903 } else {
1904 S.Diag(loc, diag::err_arc_indirect_no_ownership) << type << isReference;
1905 }
1906 implicitLifetime = Qualifiers::OCL_Strong;
1907 }
1908 assert(implicitLifetime && "didn't infer any lifetime!")((implicitLifetime && "didn't infer any lifetime!") ?
static_cast<void> (0) : __assert_fail ("implicitLifetime && \"didn't infer any lifetime!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 1908, __PRETTY_FUNCTION__))
;
1909
1910 Qualifiers qs;
1911 qs.addObjCLifetime(implicitLifetime);
1912 return S.Context.getQualifiedType(type, qs);
1913}
1914
1915static std::string getFunctionQualifiersAsString(const FunctionProtoType *FnTy){
1916 std::string Quals = FnTy->getMethodQuals().getAsString();
1917
1918 switch (FnTy->getRefQualifier()) {
1919 case RQ_None:
1920 break;
1921
1922 case RQ_LValue:
1923 if (!Quals.empty())
1924 Quals += ' ';
1925 Quals += '&';
1926 break;
1927
1928 case RQ_RValue:
1929 if (!Quals.empty())
1930 Quals += ' ';
1931 Quals += "&&";
1932 break;
1933 }
1934
1935 return Quals;
1936}
1937
1938namespace {
1939/// Kinds of declarator that cannot contain a qualified function type.
1940///
1941/// C++98 [dcl.fct]p4 / C++11 [dcl.fct]p6:
1942/// a function type with a cv-qualifier or a ref-qualifier can only appear
1943/// at the topmost level of a type.
1944///
1945/// Parens and member pointers are permitted. We don't diagnose array and
1946/// function declarators, because they don't allow function types at all.
1947///
1948/// The values of this enum are used in diagnostics.
1949enum QualifiedFunctionKind { QFK_BlockPointer, QFK_Pointer, QFK_Reference };
1950} // end anonymous namespace
1951
1952/// Check whether the type T is a qualified function type, and if it is,
1953/// diagnose that it cannot be contained within the given kind of declarator.
1954static bool checkQualifiedFunction(Sema &S, QualType T, SourceLocation Loc,
1955 QualifiedFunctionKind QFK) {
1956 // Does T refer to a function type with a cv-qualifier or a ref-qualifier?
1957 const FunctionProtoType *FPT = T->getAs<FunctionProtoType>();
1958 if (!FPT ||
1959 (FPT->getMethodQuals().empty() && FPT->getRefQualifier() == RQ_None))
1960 return false;
1961
1962 S.Diag(Loc, diag::err_compound_qualified_function_type)
1963 << QFK << isa<FunctionType>(T.IgnoreParens()) << T
1964 << getFunctionQualifiersAsString(FPT);
1965 return true;
1966}
1967
1968bool Sema::CheckQualifiedFunctionForTypeId(QualType T, SourceLocation Loc) {
1969 const FunctionProtoType *FPT = T->getAs<FunctionProtoType>();
1970 if (!FPT ||
1971 (FPT->getMethodQuals().empty() && FPT->getRefQualifier() == RQ_None))
1972 return false;
1973
1974 Diag(Loc, diag::err_qualified_function_typeid)
1975 << T << getFunctionQualifiersAsString(FPT);
1976 return true;
1977}
1978
1979/// Build a pointer type.
1980///
1981/// \param T The type to which we'll be building a pointer.
1982///
1983/// \param Loc The location of the entity whose type involves this
1984/// pointer type or, if there is no such entity, the location of the
1985/// type that will have pointer type.
1986///
1987/// \param Entity The name of the entity that involves the pointer
1988/// type, if known.
1989///
1990/// \returns A suitable pointer type, if there are no
1991/// errors. Otherwise, returns a NULL type.
1992QualType Sema::BuildPointerType(QualType T,
1993 SourceLocation Loc, DeclarationName Entity) {
1994 if (T->isReferenceType()) {
1995 // C++ 8.3.2p4: There shall be no ... pointers to references ...
1996 Diag(Loc, diag::err_illegal_decl_pointer_to_reference)
1997 << getPrintableNameForEntity(Entity) << T;
1998 return QualType();
1999 }
2000
2001 if (T->isFunctionType() && getLangOpts().OpenCL) {
2002 Diag(Loc, diag::err_opencl_function_pointer);
2003 return QualType();
2004 }
2005
2006 if (checkQualifiedFunction(*this, T, Loc, QFK_Pointer))
2007 return QualType();
2008
2009 assert(!T->isObjCObjectType() && "Should build ObjCObjectPointerType")((!T->isObjCObjectType() && "Should build ObjCObjectPointerType"
) ? static_cast<void> (0) : __assert_fail ("!T->isObjCObjectType() && \"Should build ObjCObjectPointerType\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 2009, __PRETTY_FUNCTION__))
;
2010
2011 // In ARC, it is forbidden to build pointers to unqualified pointers.
2012 if (getLangOpts().ObjCAutoRefCount)
2013 T = inferARCLifetimeForPointee(*this, T, Loc, /*reference*/ false);
2014
2015 // Build the pointer type.
2016 return Context.getPointerType(T);
2017}
2018
2019/// Build a reference type.
2020///
2021/// \param T The type to which we'll be building a reference.
2022///
2023/// \param Loc The location of the entity whose type involves this
2024/// reference type or, if there is no such entity, the location of the
2025/// type that will have reference type.
2026///
2027/// \param Entity The name of the entity that involves the reference
2028/// type, if known.
2029///
2030/// \returns A suitable reference type, if there are no
2031/// errors. Otherwise, returns a NULL type.
2032QualType Sema::BuildReferenceType(QualType T, bool SpelledAsLValue,
2033 SourceLocation Loc,
2034 DeclarationName Entity) {
2035 assert(Context.getCanonicalType(T) != Context.OverloadTy &&((Context.getCanonicalType(T) != Context.OverloadTy &&
"Unresolved overloaded function type") ? static_cast<void
> (0) : __assert_fail ("Context.getCanonicalType(T) != Context.OverloadTy && \"Unresolved overloaded function type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 2036, __PRETTY_FUNCTION__))
2036 "Unresolved overloaded function type")((Context.getCanonicalType(T) != Context.OverloadTy &&
"Unresolved overloaded function type") ? static_cast<void
> (0) : __assert_fail ("Context.getCanonicalType(T) != Context.OverloadTy && \"Unresolved overloaded function type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 2036, __PRETTY_FUNCTION__))
;
2037
2038 // C++0x [dcl.ref]p6:
2039 // If a typedef (7.1.3), a type template-parameter (14.3.1), or a
2040 // decltype-specifier (7.1.6.2) denotes a type TR that is a reference to a
2041 // type T, an attempt to create the type "lvalue reference to cv TR" creates
2042 // the type "lvalue reference to T", while an attempt to create the type
2043 // "rvalue reference to cv TR" creates the type TR.
2044 bool LValueRef = SpelledAsLValue || T->getAs<LValueReferenceType>();
2045
2046 // C++ [dcl.ref]p4: There shall be no references to references.
2047 //
2048 // According to C++ DR 106, references to references are only
2049 // diagnosed when they are written directly (e.g., "int & &"),
2050 // but not when they happen via a typedef:
2051 //
2052 // typedef int& intref;
2053 // typedef intref& intref2;
2054 //
2055 // Parser::ParseDeclaratorInternal diagnoses the case where
2056 // references are written directly; here, we handle the
2057 // collapsing of references-to-references as described in C++0x.
2058 // DR 106 and 540 introduce reference-collapsing into C++98/03.
2059
2060 // C++ [dcl.ref]p1:
2061 // A declarator that specifies the type "reference to cv void"
2062 // is ill-formed.
2063 if (T->isVoidType()) {
2064 Diag(Loc, diag::err_reference_to_void);
2065 return QualType();
2066 }
2067
2068 if (checkQualifiedFunction(*this, T, Loc, QFK_Reference))
2069 return QualType();
2070
2071 // In ARC, it is forbidden to build references to unqualified pointers.
2072 if (getLangOpts().ObjCAutoRefCount)
2073 T = inferARCLifetimeForPointee(*this, T, Loc, /*reference*/ true);
2074
2075 // Handle restrict on references.
2076 if (LValueRef)
2077 return Context.getLValueReferenceType(T, SpelledAsLValue);
2078 return Context.getRValueReferenceType(T);
2079}
2080
2081/// Build a Read-only Pipe type.
2082///
2083/// \param T The type to which we'll be building a Pipe.
2084///
2085/// \param Loc We do not use it for now.
2086///
2087/// \returns A suitable pipe type, if there are no errors. Otherwise, returns a
2088/// NULL type.
2089QualType Sema::BuildReadPipeType(QualType T, SourceLocation Loc) {
2090 return Context.getReadPipeType(T);
2091}
2092
2093/// Build a Write-only Pipe type.
2094///
2095/// \param T The type to which we'll be building a Pipe.
2096///
2097/// \param Loc We do not use it for now.
2098///
2099/// \returns A suitable pipe type, if there are no errors. Otherwise, returns a
2100/// NULL type.
2101QualType Sema::BuildWritePipeType(QualType T, SourceLocation Loc) {
2102 return Context.getWritePipeType(T);
2103}
2104
2105/// Check whether the specified array size makes the array type a VLA. If so,
2106/// return true, if not, return the size of the array in SizeVal.
2107static bool isArraySizeVLA(Sema &S, Expr *ArraySize, llvm::APSInt &SizeVal) {
2108 // If the size is an ICE, it certainly isn't a VLA. If we're in a GNU mode
2109 // (like gnu99, but not c99) accept any evaluatable value as an extension.
2110 class VLADiagnoser : public Sema::VerifyICEDiagnoser {
2111 public:
2112 VLADiagnoser() : Sema::VerifyICEDiagnoser(true) {}
2113
2114 void diagnoseNotICE(Sema &S, SourceLocation Loc, SourceRange SR) override {
2115 }
2116
2117 void diagnoseFold(Sema &S, SourceLocation Loc, SourceRange SR) override {
2118 S.Diag(Loc, diag::ext_vla_folded_to_constant) << SR;
2119 }
2120 } Diagnoser;
2121
2122 return S.VerifyIntegerConstantExpression(ArraySize, &SizeVal, Diagnoser,
2123 S.LangOpts.GNUMode ||
2124 S.LangOpts.OpenCL).isInvalid();
2125}
2126
2127/// Build an array type.
2128///
2129/// \param T The type of each element in the array.
2130///
2131/// \param ASM C99 array size modifier (e.g., '*', 'static').
2132///
2133/// \param ArraySize Expression describing the size of the array.
2134///
2135/// \param Brackets The range from the opening '[' to the closing ']'.
2136///
2137/// \param Entity The name of the entity that involves the array
2138/// type, if known.
2139///
2140/// \returns A suitable array type, if there are no errors. Otherwise,
2141/// returns a NULL type.
2142QualType Sema::BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM,
2143 Expr *ArraySize, unsigned Quals,
2144 SourceRange Brackets, DeclarationName Entity) {
2145
2146 SourceLocation Loc = Brackets.getBegin();
2147 if (getLangOpts().CPlusPlus) {
2148 // C++ [dcl.array]p1:
2149 // T is called the array element type; this type shall not be a reference
2150 // type, the (possibly cv-qualified) type void, a function type or an
2151 // abstract class type.
2152 //
2153 // C++ [dcl.array]p3:
2154 // When several "array of" specifications are adjacent, [...] only the
2155 // first of the constant expressions that specify the bounds of the arrays
2156 // may be omitted.
2157 //
2158 // Note: function types are handled in the common path with C.
2159 if (T->isReferenceType()) {
2160 Diag(Loc, diag::err_illegal_decl_array_of_references)
2161 << getPrintableNameForEntity(Entity) << T;
2162 return QualType();
2163 }
2164
2165 if (T->isVoidType() || T->isIncompleteArrayType()) {
2166 Diag(Loc, diag::err_illegal_decl_array_incomplete_type) << T;
2167 return QualType();
2168 }
2169
2170 if (RequireNonAbstractType(Brackets.getBegin(), T,
2171 diag::err_array_of_abstract_type))
2172 return QualType();
2173
2174 // Mentioning a member pointer type for an array type causes us to lock in
2175 // an inheritance model, even if it's inside an unused typedef.
2176 if (Context.getTargetInfo().getCXXABI().isMicrosoft())
2177 if (const MemberPointerType *MPTy = T->getAs<MemberPointerType>())
2178 if (!MPTy->getClass()->isDependentType())
2179 (void)isCompleteType(Loc, T);
2180
2181 } else {
2182 // C99 6.7.5.2p1: If the element type is an incomplete or function type,
2183 // reject it (e.g. void ary[7], struct foo ary[7], void ary[7]())
2184 if (RequireCompleteType(Loc, T,
2185 diag::err_illegal_decl_array_incomplete_type))
2186 return QualType();
2187 }
2188
2189 if (T->isFunctionType()) {
2190 Diag(Loc, diag::err_illegal_decl_array_of_functions)
2191 << getPrintableNameForEntity(Entity) << T;
2192 return QualType();
2193 }
2194
2195 if (const RecordType *EltTy = T->getAs<RecordType>()) {
2196 // If the element type is a struct or union that contains a variadic
2197 // array, accept it as a GNU extension: C99 6.7.2.1p2.
2198 if (EltTy->getDecl()->hasFlexibleArrayMember())
2199 Diag(Loc, diag::ext_flexible_array_in_array) << T;
2200 } else if (T->isObjCObjectType()) {
2201 Diag(Loc, diag::err_objc_array_of_interfaces) << T;
2202 return QualType();
2203 }
2204
2205 // Do placeholder conversions on the array size expression.
2206 if (ArraySize && ArraySize->hasPlaceholderType()) {
2207 ExprResult Result = CheckPlaceholderExpr(ArraySize);
2208 if (Result.isInvalid()) return QualType();
2209 ArraySize = Result.get();
2210 }
2211
2212 // Do lvalue-to-rvalue conversions on the array size expression.
2213 if (ArraySize && !ArraySize->isRValue()) {
2214 ExprResult Result = DefaultLvalueConversion(ArraySize);
2215 if (Result.isInvalid())
2216 return QualType();
2217
2218 ArraySize = Result.get();
2219 }
2220
2221 // C99 6.7.5.2p1: The size expression shall have integer type.
2222 // C++11 allows contextual conversions to such types.
2223 if (!getLangOpts().CPlusPlus11 &&
2224 ArraySize && !ArraySize->isTypeDependent() &&
2225 !ArraySize->getType()->isIntegralOrUnscopedEnumerationType()) {
2226 Diag(ArraySize->getBeginLoc(), diag::err_array_size_non_int)
2227 << ArraySize->getType() << ArraySize->getSourceRange();
2228 return QualType();
2229 }
2230
2231 llvm::APSInt ConstVal(Context.getTypeSize(Context.getSizeType()));
2232 if (!ArraySize) {
2233 if (ASM == ArrayType::Star)
2234 T = Context.getVariableArrayType(T, nullptr, ASM, Quals, Brackets);
2235 else
2236 T = Context.getIncompleteArrayType(T, ASM, Quals);
2237 } else if (ArraySize->isTypeDependent() || ArraySize->isValueDependent()) {
2238 T = Context.getDependentSizedArrayType(T, ArraySize, ASM, Quals, Brackets);
2239 } else if ((!T->isDependentType() && !T->isIncompleteType() &&
2240 !T->isConstantSizeType()) ||
2241 isArraySizeVLA(*this, ArraySize, ConstVal)) {
2242 // Even in C++11, don't allow contextual conversions in the array bound
2243 // of a VLA.
2244 if (getLangOpts().CPlusPlus11 &&
2245 !ArraySize->getType()->isIntegralOrUnscopedEnumerationType()) {
2246 Diag(ArraySize->getBeginLoc(), diag::err_array_size_non_int)
2247 << ArraySize->getType() << ArraySize->getSourceRange();
2248 return QualType();
2249 }
2250
2251 // C99: an array with an element type that has a non-constant-size is a VLA.
2252 // C99: an array with a non-ICE size is a VLA. We accept any expression
2253 // that we can fold to a non-zero positive value as an extension.
2254 T = Context.getVariableArrayType(T, ArraySize, ASM, Quals, Brackets);
2255 } else {
2256 // C99 6.7.5.2p1: If the expression is a constant expression, it shall
2257 // have a value greater than zero.
2258 if (ConstVal.isSigned() && ConstVal.isNegative()) {
2259 if (Entity)
2260 Diag(ArraySize->getBeginLoc(), diag::err_decl_negative_array_size)
2261 << getPrintableNameForEntity(Entity) << ArraySize->getSourceRange();
2262 else
2263 Diag(ArraySize->getBeginLoc(), diag::err_typecheck_negative_array_size)
2264 << ArraySize->getSourceRange();
2265 return QualType();
2266 }
2267 if (ConstVal == 0) {
2268 // GCC accepts zero sized static arrays. We allow them when
2269 // we're not in a SFINAE context.
2270 Diag(ArraySize->getBeginLoc(), isSFINAEContext()
2271 ? diag::err_typecheck_zero_array_size
2272 : diag::ext_typecheck_zero_array_size)
2273 << ArraySize->getSourceRange();
2274
2275 if (ASM == ArrayType::Static) {
2276 Diag(ArraySize->getBeginLoc(),
2277 diag::warn_typecheck_zero_static_array_size)
2278 << ArraySize->getSourceRange();
2279 ASM = ArrayType::Normal;
2280 }
2281 } else if (!T->isDependentType() && !T->isVariablyModifiedType() &&
2282 !T->isIncompleteType() && !T->isUndeducedType()) {
2283 // Is the array too large?
2284 unsigned ActiveSizeBits
2285 = ConstantArrayType::getNumAddressingBits(Context, T, ConstVal);
2286 if (ActiveSizeBits > ConstantArrayType::getMaxSizeBits(Context)) {
2287 Diag(ArraySize->getBeginLoc(), diag::err_array_too_large)
2288 << ConstVal.toString(10) << ArraySize->getSourceRange();
2289 return QualType();
2290 }
2291 }
2292
2293 T = Context.getConstantArrayType(T, ConstVal, ArraySize, ASM, Quals);
2294 }
2295
2296 // OpenCL v1.2 s6.9.d: variable length arrays are not supported.
2297 if (getLangOpts().OpenCL && T->isVariableArrayType()) {
2298 Diag(Loc, diag::err_opencl_vla);
2299 return QualType();
2300 }
2301
2302 if (T->isVariableArrayType() && !Context.getTargetInfo().isVLASupported()) {
2303 // CUDA device code and some other targets don't support VLAs.
2304 targetDiag(Loc, (getLangOpts().CUDA && getLangOpts().CUDAIsDevice)
2305 ? diag::err_cuda_vla
2306 : diag::err_vla_unsupported)
2307 << ((getLangOpts().CUDA && getLangOpts().CUDAIsDevice)
2308 ? CurrentCUDATarget()
2309 : CFT_InvalidTarget);
2310 }
2311
2312 // If this is not C99, extwarn about VLA's and C99 array size modifiers.
2313 if (!getLangOpts().C99) {
2314 if (T->isVariableArrayType()) {
2315 // Prohibit the use of VLAs during template argument deduction.
2316 if (isSFINAEContext()) {
2317 Diag(Loc, diag::err_vla_in_sfinae);
2318 return QualType();
2319 }
2320 // Just extwarn about VLAs.
2321 else
2322 Diag(Loc, diag::ext_vla);
2323 } else if (ASM != ArrayType::Normal || Quals != 0)
2324 Diag(Loc,
2325 getLangOpts().CPlusPlus? diag::err_c99_array_usage_cxx
2326 : diag::ext_c99_array_usage) << ASM;
2327 }
2328
2329 if (T->isVariableArrayType()) {
2330 // Warn about VLAs for -Wvla.
2331 Diag(Loc, diag::warn_vla_used);
2332 }
2333
2334 // OpenCL v2.0 s6.12.5 - Arrays of blocks are not supported.
2335 // OpenCL v2.0 s6.16.13.1 - Arrays of pipe type are not supported.
2336 // OpenCL v2.0 s6.9.b - Arrays of image/sampler type are not supported.
2337 if (getLangOpts().OpenCL) {
2338 const QualType ArrType = Context.getBaseElementType(T);
2339 if (ArrType->isBlockPointerType() || ArrType->isPipeType() ||
2340 ArrType->isSamplerT() || ArrType->isImageType()) {
2341 Diag(Loc, diag::err_opencl_invalid_type_array) << ArrType;
2342 return QualType();
2343 }
2344 }
2345
2346 return T;
2347}
2348
2349QualType Sema::BuildVectorType(QualType CurType, Expr *SizeExpr,
2350 SourceLocation AttrLoc) {
2351 // The base type must be integer (not Boolean or enumeration) or float, and
2352 // can't already be a vector.
2353 if (!CurType->isDependentType() &&
2354 (!CurType->isBuiltinType() || CurType->isBooleanType() ||
2355 (!CurType->isIntegerType() && !CurType->isRealFloatingType()))) {
2356 Diag(AttrLoc, diag::err_attribute_invalid_vector_type) << CurType;
2357 return QualType();
2358 }
2359
2360 if (SizeExpr->isTypeDependent() || SizeExpr->isValueDependent())
2361 return Context.getDependentVectorType(CurType, SizeExpr, AttrLoc,
2362 VectorType::GenericVector);
2363
2364 llvm::APSInt VecSize(32);
2365 if (!SizeExpr->isIntegerConstantExpr(VecSize, Context)) {
2366 Diag(AttrLoc, diag::err_attribute_argument_type)
2367 << "vector_size" << AANT_ArgumentIntegerConstant
2368 << SizeExpr->getSourceRange();
2369 return QualType();
2370 }
2371
2372 if (CurType->isDependentType())
2373 return Context.getDependentVectorType(CurType, SizeExpr, AttrLoc,
2374 VectorType::GenericVector);
2375
2376 unsigned VectorSize = static_cast<unsigned>(VecSize.getZExtValue() * 8);
2377 unsigned TypeSize = static_cast<unsigned>(Context.getTypeSize(CurType));
2378
2379 if (VectorSize == 0) {
2380 Diag(AttrLoc, diag::err_attribute_zero_size) << SizeExpr->getSourceRange();
2381 return QualType();
2382 }
2383
2384 // vecSize is specified in bytes - convert to bits.
2385 if (VectorSize % TypeSize) {
2386 Diag(AttrLoc, diag::err_attribute_invalid_size)
2387 << SizeExpr->getSourceRange();
2388 return QualType();
2389 }
2390
2391 if (VectorType::isVectorSizeTooLarge(VectorSize / TypeSize)) {
2392 Diag(AttrLoc, diag::err_attribute_size_too_large)
2393 << SizeExpr->getSourceRange();
2394 return QualType();
2395 }
2396
2397 return Context.getVectorType(CurType, VectorSize / TypeSize,
2398 VectorType::GenericVector);
2399}
2400
2401/// Build an ext-vector type.
2402///
2403/// Run the required checks for the extended vector type.
2404QualType Sema::BuildExtVectorType(QualType T, Expr *ArraySize,
2405 SourceLocation AttrLoc) {
2406 // Unlike gcc's vector_size attribute, we do not allow vectors to be defined
2407 // in conjunction with complex types (pointers, arrays, functions, etc.).
2408 //
2409 // Additionally, OpenCL prohibits vectors of booleans (they're considered a
2410 // reserved data type under OpenCL v2.0 s6.1.4), we don't support selects
2411 // on bitvectors, and we have no well-defined ABI for bitvectors, so vectors
2412 // of bool aren't allowed.
2413 if ((!T->isDependentType() && !T->isIntegerType() &&
2414 !T->isRealFloatingType()) ||
2415 T->isBooleanType()) {
2416 Diag(AttrLoc, diag::err_attribute_invalid_vector_type) << T;
2417 return QualType();
2418 }
2419
2420 if (!ArraySize->isTypeDependent() && !ArraySize->isValueDependent()) {
2421 llvm::APSInt vecSize(32);
2422 if (!ArraySize->isIntegerConstantExpr(vecSize, Context)) {
2423 Diag(AttrLoc, diag::err_attribute_argument_type)
2424 << "ext_vector_type" << AANT_ArgumentIntegerConstant
2425 << ArraySize->getSourceRange();
2426 return QualType();
2427 }
2428
2429 // Unlike gcc's vector_size attribute, the size is specified as the
2430 // number of elements, not the number of bytes.
2431 unsigned vectorSize = static_cast<unsigned>(vecSize.getZExtValue());
2432
2433 if (vectorSize == 0) {
2434 Diag(AttrLoc, diag::err_attribute_zero_size)
2435 << ArraySize->getSourceRange();
2436 return QualType();
2437 }
2438
2439 if (VectorType::isVectorSizeTooLarge(vectorSize)) {
2440 Diag(AttrLoc, diag::err_attribute_size_too_large)
2441 << ArraySize->getSourceRange();
2442 return QualType();
2443 }
2444
2445 return Context.getExtVectorType(T, vectorSize);
2446 }
2447
2448 return Context.getDependentSizedExtVectorType(T, ArraySize, AttrLoc);
2449}
2450
2451bool Sema::CheckFunctionReturnType(QualType T, SourceLocation Loc) {
2452 if (T->isArrayType() || T->isFunctionType()) {
2453 Diag(Loc, diag::err_func_returning_array_function)
2454 << T->isFunctionType() << T;
2455 return true;
2456 }
2457
2458 // Functions cannot return half FP.
2459 if (T->isHalfType() && !getLangOpts().HalfArgsAndReturns) {
2460 Diag(Loc, diag::err_parameters_retval_cannot_have_fp16_type) << 1 <<
2461 FixItHint::CreateInsertion(Loc, "*");
2462 return true;
2463 }
2464
2465 // Methods cannot return interface types. All ObjC objects are
2466 // passed by reference.
2467 if (T->isObjCObjectType()) {
2468 Diag(Loc, diag::err_object_cannot_be_passed_returned_by_value)
2469 << 0 << T << FixItHint::CreateInsertion(Loc, "*");
2470 return true;
2471 }
2472
2473 if (T.hasNonTrivialToPrimitiveDestructCUnion() ||
2474 T.hasNonTrivialToPrimitiveCopyCUnion())
2475 checkNonTrivialCUnion(T, Loc, NTCUC_FunctionReturn,
2476 NTCUK_Destruct|NTCUK_Copy);
2477
2478 // C++2a [dcl.fct]p12:
2479 // A volatile-qualified return type is deprecated
2480 if (T.isVolatileQualified() && getLangOpts().CPlusPlus2a)
2481 Diag(Loc, diag::warn_deprecated_volatile_return) << T;
2482
2483 return false;
2484}
2485
2486/// Check the extended parameter information. Most of the necessary
2487/// checking should occur when applying the parameter attribute; the
2488/// only other checks required are positional restrictions.
2489static void checkExtParameterInfos(Sema &S, ArrayRef<QualType> paramTypes,
2490 const FunctionProtoType::ExtProtoInfo &EPI,
2491 llvm::function_ref<SourceLocation(unsigned)> getParamLoc) {
2492 assert(EPI.ExtParameterInfos && "shouldn't get here without param infos")((EPI.ExtParameterInfos && "shouldn't get here without param infos"
) ? static_cast<void> (0) : __assert_fail ("EPI.ExtParameterInfos && \"shouldn't get here without param infos\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 2492, __PRETTY_FUNCTION__))
;
2493
2494 bool hasCheckedSwiftCall = false;
2495 auto checkForSwiftCC = [&](unsigned paramIndex) {
2496 // Only do this once.
2497 if (hasCheckedSwiftCall) return;
2498 hasCheckedSwiftCall = true;
2499 if (EPI.ExtInfo.getCC() == CC_Swift) return;
2500 S.Diag(getParamLoc(paramIndex), diag::err_swift_param_attr_not_swiftcall)
2501 << getParameterABISpelling(EPI.ExtParameterInfos[paramIndex].getABI());
2502 };
2503
2504 for (size_t paramIndex = 0, numParams = paramTypes.size();
2505 paramIndex != numParams; ++paramIndex) {
2506 switch (EPI.ExtParameterInfos[paramIndex].getABI()) {
2507 // Nothing interesting to check for orindary-ABI parameters.
2508 case ParameterABI::Ordinary:
2509 continue;
2510
2511 // swift_indirect_result parameters must be a prefix of the function
2512 // arguments.
2513 case ParameterABI::SwiftIndirectResult:
2514 checkForSwiftCC(paramIndex);
2515 if (paramIndex != 0 &&
2516 EPI.ExtParameterInfos[paramIndex - 1].getABI()
2517 != ParameterABI::SwiftIndirectResult) {
2518 S.Diag(getParamLoc(paramIndex),
2519 diag::err_swift_indirect_result_not_first);
2520 }
2521 continue;
2522
2523 case ParameterABI::SwiftContext:
2524 checkForSwiftCC(paramIndex);
2525 continue;
2526
2527 // swift_error parameters must be preceded by a swift_context parameter.
2528 case ParameterABI::SwiftErrorResult:
2529 checkForSwiftCC(paramIndex);
2530 if (paramIndex == 0 ||
2531 EPI.ExtParameterInfos[paramIndex - 1].getABI() !=
2532 ParameterABI::SwiftContext) {
2533 S.Diag(getParamLoc(paramIndex),
2534 diag::err_swift_error_result_not_after_swift_context);
2535 }
2536 continue;
2537 }
2538 llvm_unreachable("bad ABI kind")::llvm::llvm_unreachable_internal("bad ABI kind", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 2538)
;
2539 }
2540}
2541
2542QualType Sema::BuildFunctionType(QualType T,
2543 MutableArrayRef<QualType> ParamTypes,
2544 SourceLocation Loc, DeclarationName Entity,
2545 const FunctionProtoType::ExtProtoInfo &EPI) {
2546 bool Invalid = false;
2547
2548 Invalid |= CheckFunctionReturnType(T, Loc);
2549
2550 for (unsigned Idx = 0, Cnt = ParamTypes.size(); Idx < Cnt; ++Idx) {
2551 // FIXME: Loc is too inprecise here, should use proper locations for args.
2552 QualType ParamType = Context.getAdjustedParameterType(ParamTypes[Idx]);
2553 if (ParamType->isVoidType()) {
2554 Diag(Loc, diag::err_param_with_void_type);
2555 Invalid = true;
2556 } else if (ParamType->isHalfType() && !getLangOpts().HalfArgsAndReturns) {
2557 // Disallow half FP arguments.
2558 Diag(Loc, diag::err_parameters_retval_cannot_have_fp16_type) << 0 <<
2559 FixItHint::CreateInsertion(Loc, "*");
2560 Invalid = true;
2561 }
2562
2563 // C++2a [dcl.fct]p4:
2564 // A parameter with volatile-qualified type is deprecated
2565 if (ParamType.isVolatileQualified() && getLangOpts().CPlusPlus2a)
2566 Diag(Loc, diag::warn_deprecated_volatile_param) << ParamType;
2567
2568 ParamTypes[Idx] = ParamType;
2569 }
2570
2571 if (EPI.ExtParameterInfos) {
2572 checkExtParameterInfos(*this, ParamTypes, EPI,
2573 [=](unsigned i) { return Loc; });
2574 }
2575
2576 if (EPI.ExtInfo.getProducesResult()) {
2577 // This is just a warning, so we can't fail to build if we see it.
2578 checkNSReturnsRetainedReturnType(Loc, T);
2579 }
2580
2581 if (Invalid)
2582 return QualType();
2583
2584 return Context.getFunctionType(T, ParamTypes, EPI);
2585}
2586
2587/// Build a member pointer type \c T Class::*.
2588///
2589/// \param T the type to which the member pointer refers.
2590/// \param Class the class type into which the member pointer points.
2591/// \param Loc the location where this type begins
2592/// \param Entity the name of the entity that will have this member pointer type
2593///
2594/// \returns a member pointer type, if successful, or a NULL type if there was
2595/// an error.
2596QualType Sema::BuildMemberPointerType(QualType T, QualType Class,
2597 SourceLocation Loc,
2598 DeclarationName Entity) {
2599 // Verify that we're not building a pointer to pointer to function with
2600 // exception specification.
2601 if (CheckDistantExceptionSpec(T)) {
2602 Diag(Loc, diag::err_distant_exception_spec);
2603 return QualType();
2604 }
2605
2606 // C++ 8.3.3p3: A pointer to member shall not point to ... a member
2607 // with reference type, or "cv void."
2608 if (T->isReferenceType()) {
2609 Diag(Loc, diag::err_illegal_decl_mempointer_to_reference)
2610 << getPrintableNameForEntity(Entity) << T;
2611 return QualType();
2612 }
2613
2614 if (T->isVoidType()) {
2615 Diag(Loc, diag::err_illegal_decl_mempointer_to_void)
2616 << getPrintableNameForEntity(Entity);
2617 return QualType();
2618 }
2619
2620 if (!Class->isDependentType() && !Class->isRecordType()) {
2621 Diag(Loc, diag::err_mempointer_in_nonclass_type) << Class;
2622 return QualType();
2623 }
2624
2625 // Adjust the default free function calling convention to the default method
2626 // calling convention.
2627 bool IsCtorOrDtor =
2628 (Entity.getNameKind() == DeclarationName::CXXConstructorName) ||
2629 (Entity.getNameKind() == DeclarationName::CXXDestructorName);
2630 if (T->isFunctionType())
2631 adjustMemberFunctionCC(T, /*IsStatic=*/false, IsCtorOrDtor, Loc);
2632
2633 return Context.getMemberPointerType(T, Class.getTypePtr());
2634}
2635
2636/// Build a block pointer type.
2637///
2638/// \param T The type to which we'll be building a block pointer.
2639///
2640/// \param Loc The source location, used for diagnostics.
2641///
2642/// \param Entity The name of the entity that involves the block pointer
2643/// type, if known.
2644///
2645/// \returns A suitable block pointer type, if there are no
2646/// errors. Otherwise, returns a NULL type.
2647QualType Sema::BuildBlockPointerType(QualType T,
2648 SourceLocation Loc,
2649 DeclarationName Entity) {
2650 if (!T->isFunctionType()) {
2651 Diag(Loc, diag::err_nonfunction_block_type);
2652 return QualType();
2653 }
2654
2655 if (checkQualifiedFunction(*this, T, Loc, QFK_BlockPointer))
2656 return QualType();
2657
2658 return Context.getBlockPointerType(T);
2659}
2660
2661QualType Sema::GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo) {
2662 QualType QT = Ty.get();
2663 if (QT.isNull()) {
2664 if (TInfo) *TInfo = nullptr;
2665 return QualType();
2666 }
2667
2668 TypeSourceInfo *DI = nullptr;
2669 if (const LocInfoType *LIT = dyn_cast<LocInfoType>(QT)) {
2670 QT = LIT->getType();
2671 DI = LIT->getTypeSourceInfo();
2672 }
2673
2674 if (TInfo) *TInfo = DI;
2675 return QT;
2676}
2677
2678static void transferARCOwnershipToDeclaratorChunk(TypeProcessingState &state,
2679 Qualifiers::ObjCLifetime ownership,
2680 unsigned chunkIndex);
2681
2682/// Given that this is the declaration of a parameter under ARC,
2683/// attempt to infer attributes and such for pointer-to-whatever
2684/// types.
2685static void inferARCWriteback(TypeProcessingState &state,
2686 QualType &declSpecType) {
2687 Sema &S = state.getSema();
2688 Declarator &declarator = state.getDeclarator();
2689
2690 // TODO: should we care about decl qualifiers?
2691
2692 // Check whether the declarator has the expected form. We walk
2693 // from the inside out in order to make the block logic work.
2694 unsigned outermostPointerIndex = 0;
2695 bool isBlockPointer = false;
2696 unsigned numPointers = 0;
2697 for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) {
2698 unsigned chunkIndex = i;
2699 DeclaratorChunk &chunk = declarator.getTypeObject(chunkIndex);
2700 switch (chunk.Kind) {
2701 case DeclaratorChunk::Paren:
2702 // Ignore parens.
2703 break;
2704
2705 case DeclaratorChunk::Reference:
2706 case DeclaratorChunk::Pointer:
2707 // Count the number of pointers. Treat references
2708 // interchangeably as pointers; if they're mis-ordered, normal
2709 // type building will discover that.
2710 outermostPointerIndex = chunkIndex;
2711 numPointers++;
2712 break;
2713
2714 case DeclaratorChunk::BlockPointer:
2715 // If we have a pointer to block pointer, that's an acceptable
2716 // indirect reference; anything else is not an application of
2717 // the rules.
2718 if (numPointers != 1) return;
2719 numPointers++;
2720 outermostPointerIndex = chunkIndex;
2721 isBlockPointer = true;
2722
2723 // We don't care about pointer structure in return values here.
2724 goto done;
2725
2726 case DeclaratorChunk::Array: // suppress if written (id[])?
2727 case DeclaratorChunk::Function:
2728 case DeclaratorChunk::MemberPointer:
2729 case DeclaratorChunk::Pipe:
2730 return;
2731 }
2732 }
2733 done:
2734
2735 // If we have *one* pointer, then we want to throw the qualifier on
2736 // the declaration-specifiers, which means that it needs to be a
2737 // retainable object type.
2738 if (numPointers == 1) {
2739 // If it's not a retainable object type, the rule doesn't apply.
2740 if (!declSpecType->isObjCRetainableType()) return;
2741
2742 // If it already has lifetime, don't do anything.
2743 if (declSpecType.getObjCLifetime()) return;
2744
2745 // Otherwise, modify the type in-place.
2746 Qualifiers qs;
2747
2748 if (declSpecType->isObjCARCImplicitlyUnretainedType())
2749 qs.addObjCLifetime(Qualifiers::OCL_ExplicitNone);
2750 else
2751 qs.addObjCLifetime(Qualifiers::OCL_Autoreleasing);
2752 declSpecType = S.Context.getQualifiedType(declSpecType, qs);
2753
2754 // If we have *two* pointers, then we want to throw the qualifier on
2755 // the outermost pointer.
2756 } else if (numPointers == 2) {
2757 // If we don't have a block pointer, we need to check whether the
2758 // declaration-specifiers gave us something that will turn into a
2759 // retainable object pointer after we slap the first pointer on it.
2760 if (!isBlockPointer && !declSpecType->isObjCObjectType())
2761 return;
2762
2763 // Look for an explicit lifetime attribute there.
2764 DeclaratorChunk &chunk = declarator.getTypeObject(outermostPointerIndex);
2765 if (chunk.Kind != DeclaratorChunk::Pointer &&
2766 chunk.Kind != DeclaratorChunk::BlockPointer)
2767 return;
2768 for (const ParsedAttr &AL : chunk.getAttrs())
2769 if (AL.getKind() == ParsedAttr::AT_ObjCOwnership)
2770 return;
2771
2772 transferARCOwnershipToDeclaratorChunk(state, Qualifiers::OCL_Autoreleasing,
2773 outermostPointerIndex);
2774
2775 // Any other number of pointers/references does not trigger the rule.
2776 } else return;
2777
2778 // TODO: mark whether we did this inference?
2779}
2780
2781void Sema::diagnoseIgnoredQualifiers(unsigned DiagID, unsigned Quals,
2782 SourceLocation FallbackLoc,
2783 SourceLocation ConstQualLoc,
2784 SourceLocation VolatileQualLoc,
2785 SourceLocation RestrictQualLoc,
2786 SourceLocation AtomicQualLoc,
2787 SourceLocation UnalignedQualLoc) {
2788 if (!Quals)
2789 return;
2790
2791 struct Qual {
2792 const char *Name;
2793 unsigned Mask;
2794 SourceLocation Loc;
2795 } const QualKinds[5] = {
2796 { "const", DeclSpec::TQ_const, ConstQualLoc },
2797 { "volatile", DeclSpec::TQ_volatile, VolatileQualLoc },
2798 { "restrict", DeclSpec::TQ_restrict, RestrictQualLoc },
2799 { "__unaligned", DeclSpec::TQ_unaligned, UnalignedQualLoc },
2800 { "_Atomic", DeclSpec::TQ_atomic, AtomicQualLoc }
2801 };
2802
2803 SmallString<32> QualStr;
2804 unsigned NumQuals = 0;
2805 SourceLocation Loc;
2806 FixItHint FixIts[5];
2807
2808 // Build a string naming the redundant qualifiers.
2809 for (auto &E : QualKinds) {
2810 if (Quals & E.Mask) {
2811 if (!QualStr.empty()) QualStr += ' ';
2812 QualStr += E.Name;
2813
2814 // If we have a location for the qualifier, offer a fixit.
2815 SourceLocation QualLoc = E.Loc;
2816 if (QualLoc.isValid()) {
2817 FixIts[NumQuals] = FixItHint::CreateRemoval(QualLoc);
2818 if (Loc.isInvalid() ||
2819 getSourceManager().isBeforeInTranslationUnit(QualLoc, Loc))
2820 Loc = QualLoc;
2821 }
2822
2823 ++NumQuals;
2824 }
2825 }
2826
2827 Diag(Loc.isInvalid() ? FallbackLoc : Loc, DiagID)
2828 << QualStr << NumQuals << FixIts[0] << FixIts[1] << FixIts[2] << FixIts[3];
2829}
2830
2831// Diagnose pointless type qualifiers on the return type of a function.
2832static void diagnoseRedundantReturnTypeQualifiers(Sema &S, QualType RetTy,
2833 Declarator &D,
2834 unsigned FunctionChunkIndex) {
2835 if (D.getTypeObject(FunctionChunkIndex).Fun.hasTrailingReturnType()) {
2836 // FIXME: TypeSourceInfo doesn't preserve location information for
2837 // qualifiers.
2838 S.diagnoseIgnoredQualifiers(diag::warn_qual_return_type,
2839 RetTy.getLocalCVRQualifiers(),
2840 D.getIdentifierLoc());
2841 return;
2842 }
2843
2844 for (unsigned OuterChunkIndex = FunctionChunkIndex + 1,
2845 End = D.getNumTypeObjects();
2846 OuterChunkIndex != End; ++OuterChunkIndex) {
2847 DeclaratorChunk &OuterChunk = D.getTypeObject(OuterChunkIndex);
2848 switch (OuterChunk.Kind) {
2849 case DeclaratorChunk::Paren:
2850 continue;
2851
2852 case DeclaratorChunk::Pointer: {
2853 DeclaratorChunk::PointerTypeInfo &PTI = OuterChunk.Ptr;
2854 S.diagnoseIgnoredQualifiers(
2855 diag::warn_qual_return_type,
2856 PTI.TypeQuals,
2857 SourceLocation(),
2858 SourceLocation::getFromRawEncoding(PTI.ConstQualLoc),
2859 SourceLocation::getFromRawEncoding(PTI.VolatileQualLoc),
2860 SourceLocation::getFromRawEncoding(PTI.RestrictQualLoc),
2861 SourceLocation::getFromRawEncoding(PTI.AtomicQualLoc),
2862 SourceLocation::getFromRawEncoding(PTI.UnalignedQualLoc));
2863 return;
2864 }
2865
2866 case DeclaratorChunk::Function:
2867 case DeclaratorChunk::BlockPointer:
2868 case DeclaratorChunk::Reference:
2869 case DeclaratorChunk::Array:
2870 case DeclaratorChunk::MemberPointer:
2871 case DeclaratorChunk::Pipe:
2872 // FIXME: We can't currently provide an accurate source location and a
2873 // fix-it hint for these.
2874 unsigned AtomicQual = RetTy->isAtomicType() ? DeclSpec::TQ_atomic : 0;
2875 S.diagnoseIgnoredQualifiers(diag::warn_qual_return_type,
2876 RetTy.getCVRQualifiers() | AtomicQual,
2877 D.getIdentifierLoc());
2878 return;
2879 }
2880
2881 llvm_unreachable("unknown declarator chunk kind")::llvm::llvm_unreachable_internal("unknown declarator chunk kind"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 2881)
;
2882 }
2883
2884 // If the qualifiers come from a conversion function type, don't diagnose
2885 // them -- they're not necessarily redundant, since such a conversion
2886 // operator can be explicitly called as "x.operator const int()".
2887 if (D.getName().getKind() == UnqualifiedIdKind::IK_ConversionFunctionId)
2888 return;
2889
2890 // Just parens all the way out to the decl specifiers. Diagnose any qualifiers
2891 // which are present there.
2892 S.diagnoseIgnoredQualifiers(diag::warn_qual_return_type,
2893 D.getDeclSpec().getTypeQualifiers(),
2894 D.getIdentifierLoc(),
2895 D.getDeclSpec().getConstSpecLoc(),
2896 D.getDeclSpec().getVolatileSpecLoc(),
2897 D.getDeclSpec().getRestrictSpecLoc(),
2898 D.getDeclSpec().getAtomicSpecLoc(),
2899 D.getDeclSpec().getUnalignedSpecLoc());
2900}
2901
2902static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state,
2903 TypeSourceInfo *&ReturnTypeInfo) {
2904 Sema &SemaRef = state.getSema();
2905 Declarator &D = state.getDeclarator();
2906 QualType T;
2907 ReturnTypeInfo = nullptr;
2908
2909 // The TagDecl owned by the DeclSpec.
2910 TagDecl *OwnedTagDecl = nullptr;
2911
2912 switch (D.getName().getKind()) {
2913 case UnqualifiedIdKind::IK_ImplicitSelfParam:
2914 case UnqualifiedIdKind::IK_OperatorFunctionId:
2915 case UnqualifiedIdKind::IK_Identifier:
2916 case UnqualifiedIdKind::IK_LiteralOperatorId:
2917 case UnqualifiedIdKind::IK_TemplateId:
2918 T = ConvertDeclSpecToType(state);
2919
2920 if (!D.isInvalidType() && D.getDeclSpec().isTypeSpecOwned()) {
2921 OwnedTagDecl = cast<TagDecl>(D.getDeclSpec().getRepAsDecl());
2922 // Owned declaration is embedded in declarator.
2923 OwnedTagDecl->setEmbeddedInDeclarator(true);
2924 }
2925 break;
2926
2927 case UnqualifiedIdKind::IK_ConstructorName:
2928 case UnqualifiedIdKind::IK_ConstructorTemplateId:
2929 case UnqualifiedIdKind::IK_DestructorName:
2930 // Constructors and destructors don't have return types. Use
2931 // "void" instead.
2932 T = SemaRef.Context.VoidTy;
2933 processTypeAttrs(state, T, TAL_DeclSpec,
2934 D.getMutableDeclSpec().getAttributes());
2935 break;
2936
2937 case UnqualifiedIdKind::IK_DeductionGuideName:
2938 // Deduction guides have a trailing return type and no type in their
2939 // decl-specifier sequence. Use a placeholder return type for now.
2940 T = SemaRef.Context.DependentTy;
2941 break;
2942
2943 case UnqualifiedIdKind::IK_ConversionFunctionId:
2944 // The result type of a conversion function is the type that it
2945 // converts to.
2946 T = SemaRef.GetTypeFromParser(D.getName().ConversionFunctionId,
2947 &ReturnTypeInfo);
2948 break;
2949 }
2950
2951 if (!D.getAttributes().empty())
2952 distributeTypeAttrsFromDeclarator(state, T);
2953
2954 // C++11 [dcl.spec.auto]p5: reject 'auto' if it is not in an allowed context.
2955 if (DeducedType *Deduced = T->getContainedDeducedType()) {
2956 AutoType *Auto = dyn_cast<AutoType>(Deduced);
2957 int Error = -1;
2958
2959 // Is this a 'auto' or 'decltype(auto)' type (as opposed to __auto_type or
2960 // class template argument deduction)?
2961 bool IsCXXAutoType =
2962 (Auto && Auto->getKeyword() != AutoTypeKeyword::GNUAutoType);
2963 bool IsDeducedReturnType = false;
2964
2965 switch (D.getContext()) {
2966 case DeclaratorContext::LambdaExprContext:
2967 // Declared return type of a lambda-declarator is implicit and is always
2968 // 'auto'.
2969 break;
2970 case DeclaratorContext::ObjCParameterContext:
2971 case DeclaratorContext::ObjCResultContext:
2972 case DeclaratorContext::PrototypeContext:
2973 Error = 0;
2974 break;
2975 case DeclaratorContext::LambdaExprParameterContext:
2976 // In C++14, generic lambdas allow 'auto' in their parameters.
2977 if (!SemaRef.getLangOpts().CPlusPlus14 ||
2978 !Auto || Auto->getKeyword() != AutoTypeKeyword::Auto)
2979 Error = 16;
2980 else {
2981 // If auto is mentioned in a lambda parameter context, convert it to a
2982 // template parameter type.
2983 sema::LambdaScopeInfo *LSI = SemaRef.getCurLambda();
2984 assert(LSI && "No LambdaScopeInfo on the stack!")((LSI && "No LambdaScopeInfo on the stack!") ? static_cast
<void> (0) : __assert_fail ("LSI && \"No LambdaScopeInfo on the stack!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 2984, __PRETTY_FUNCTION__))
;
2985 const unsigned TemplateParameterDepth = LSI->AutoTemplateParameterDepth;
2986 const unsigned AutoParameterPosition = LSI->TemplateParams.size();
2987 const bool IsParameterPack = D.hasEllipsis();
2988
2989 // Create the TemplateTypeParmDecl here to retrieve the corresponding
2990 // template parameter type. Template parameters are temporarily added
2991 // to the TU until the associated TemplateDecl is created.
2992 TemplateTypeParmDecl *CorrespondingTemplateParam =
2993 TemplateTypeParmDecl::Create(
2994 SemaRef.Context, SemaRef.Context.getTranslationUnitDecl(),
2995 /*KeyLoc*/ SourceLocation(), /*NameLoc*/ D.getBeginLoc(),
2996 TemplateParameterDepth, AutoParameterPosition,
2997 /*Identifier*/ nullptr, false, IsParameterPack);
2998 CorrespondingTemplateParam->setImplicit();
2999 LSI->TemplateParams.push_back(CorrespondingTemplateParam);
3000 // Replace the 'auto' in the function parameter with this invented
3001 // template type parameter.
3002 // FIXME: Retain some type sugar to indicate that this was written
3003 // as 'auto'.
3004 T = state.ReplaceAutoType(
3005 T, QualType(CorrespondingTemplateParam->getTypeForDecl(), 0));
3006 }
3007 break;
3008 case DeclaratorContext::MemberContext: {
3009 if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static ||
3010 D.isFunctionDeclarator())
3011 break;
3012 bool Cxx = SemaRef.getLangOpts().CPlusPlus;
3013 switch (cast<TagDecl>(SemaRef.CurContext)->getTagKind()) {
3014 case TTK_Enum: llvm_unreachable("unhandled tag kind")::llvm::llvm_unreachable_internal("unhandled tag kind", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3014)
;
3015 case TTK_Struct: Error = Cxx ? 1 : 2; /* Struct member */ break;
3016 case TTK_Union: Error = Cxx ? 3 : 4; /* Union member */ break;
3017 case TTK_Class: Error = 5; /* Class member */ break;
3018 case TTK_Interface: Error = 6; /* Interface member */ break;
3019 }
3020 if (D.getDeclSpec().isFriendSpecified())
3021 Error = 20; // Friend type
3022 break;
3023 }
3024 case DeclaratorContext::CXXCatchContext:
3025 case DeclaratorContext::ObjCCatchContext:
3026 Error = 7; // Exception declaration
3027 break;
3028 case DeclaratorContext::TemplateParamContext:
3029 if (isa<DeducedTemplateSpecializationType>(Deduced))
3030 Error = 19; // Template parameter
3031 else if (!SemaRef.getLangOpts().CPlusPlus17)
3032 Error = 8; // Template parameter (until C++17)
3033 break;
3034 case DeclaratorContext::BlockLiteralContext:
3035 Error = 9; // Block literal
3036 break;
3037 case DeclaratorContext::TemplateArgContext:
3038 // Within a template argument list, a deduced template specialization
3039 // type will be reinterpreted as a template template argument.
3040 if (isa<DeducedTemplateSpecializationType>(Deduced) &&
3041 !D.getNumTypeObjects() &&
3042 D.getDeclSpec().getParsedSpecifiers() == DeclSpec::PQ_TypeSpecifier)
3043 break;
3044 LLVM_FALLTHROUGH[[gnu::fallthrough]];
3045 case DeclaratorContext::TemplateTypeArgContext:
3046 Error = 10; // Template type argument
3047 break;
3048 case DeclaratorContext::AliasDeclContext:
3049 case DeclaratorContext::AliasTemplateContext:
3050 Error = 12; // Type alias
3051 break;
3052 case DeclaratorContext::TrailingReturnContext:
3053 case DeclaratorContext::TrailingReturnVarContext:
3054 if (!SemaRef.getLangOpts().CPlusPlus14 || !IsCXXAutoType)
3055 Error = 13; // Function return type
3056 IsDeducedReturnType = true;
3057 break;
3058 case DeclaratorContext::ConversionIdContext:
3059 if (!SemaRef.getLangOpts().CPlusPlus14 || !IsCXXAutoType)
3060 Error = 14; // conversion-type-id
3061 IsDeducedReturnType = true;
3062 break;
3063 case DeclaratorContext::FunctionalCastContext:
3064 if (isa<DeducedTemplateSpecializationType>(Deduced))
3065 break;
3066 LLVM_FALLTHROUGH[[gnu::fallthrough]];
3067 case DeclaratorContext::TypeNameContext:
3068 Error = 15; // Generic
3069 break;
3070 case DeclaratorContext::FileContext:
3071 case DeclaratorContext::BlockContext:
3072 case DeclaratorContext::ForContext:
3073 case DeclaratorContext::InitStmtContext:
3074 case DeclaratorContext::ConditionContext:
3075 // FIXME: P0091R3 (erroneously) does not permit class template argument
3076 // deduction in conditions, for-init-statements, and other declarations
3077 // that are not simple-declarations.
3078 break;
3079 case DeclaratorContext::CXXNewContext:
3080 // FIXME: P0091R3 does not permit class template argument deduction here,
3081 // but we follow GCC and allow it anyway.
3082 if (!IsCXXAutoType && !isa<DeducedTemplateSpecializationType>(Deduced))
3083 Error = 17; // 'new' type
3084 break;
3085 case DeclaratorContext::KNRTypeListContext:
3086 Error = 18; // K&R function parameter
3087 break;
3088 }
3089
3090 if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef)
3091 Error = 11;
3092
3093 // In Objective-C it is an error to use 'auto' on a function declarator
3094 // (and everywhere for '__auto_type').
3095 if (D.isFunctionDeclarator() &&
3096 (!SemaRef.getLangOpts().CPlusPlus11 || !IsCXXAutoType))
3097 Error = 13;
3098
3099 bool HaveTrailing = false;
3100
3101 // C++11 [dcl.spec.auto]p2: 'auto' is always fine if the declarator
3102 // contains a trailing return type. That is only legal at the outermost
3103 // level. Check all declarator chunks (outermost first) anyway, to give
3104 // better diagnostics.
3105 // We don't support '__auto_type' with trailing return types.
3106 // FIXME: Should we only do this for 'auto' and not 'decltype(auto)'?
3107 if (SemaRef.getLangOpts().CPlusPlus11 && IsCXXAutoType &&
3108 D.hasTrailingReturnType()) {
3109 HaveTrailing = true;
3110 Error = -1;
3111 }
3112
3113 SourceRange AutoRange = D.getDeclSpec().getTypeSpecTypeLoc();
3114 if (D.getName().getKind() == UnqualifiedIdKind::IK_ConversionFunctionId)
3115 AutoRange = D.getName().getSourceRange();
3116
3117 if (Error != -1) {
3118 unsigned Kind;
3119 if (Auto) {
3120 switch (Auto->getKeyword()) {
3121 case AutoTypeKeyword::Auto: Kind = 0; break;
3122 case AutoTypeKeyword::DecltypeAuto: Kind = 1; break;
3123 case AutoTypeKeyword::GNUAutoType: Kind = 2; break;
3124 }
3125 } else {
3126 assert(isa<DeducedTemplateSpecializationType>(Deduced) &&((isa<DeducedTemplateSpecializationType>(Deduced) &&
"unknown auto type") ? static_cast<void> (0) : __assert_fail
("isa<DeducedTemplateSpecializationType>(Deduced) && \"unknown auto type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3127, __PRETTY_FUNCTION__))
3127 "unknown auto type")((isa<DeducedTemplateSpecializationType>(Deduced) &&
"unknown auto type") ? static_cast<void> (0) : __assert_fail
("isa<DeducedTemplateSpecializationType>(Deduced) && \"unknown auto type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3127, __PRETTY_FUNCTION__))
;
3128 Kind = 3;
3129 }
3130
3131 auto *DTST = dyn_cast<DeducedTemplateSpecializationType>(Deduced);
3132 TemplateName TN = DTST ? DTST->getTemplateName() : TemplateName();
3133
3134 SemaRef.Diag(AutoRange.getBegin(), diag::err_auto_not_allowed)
3135 << Kind << Error << (int)SemaRef.getTemplateNameKindForDiagnostics(TN)
3136 << QualType(Deduced, 0) << AutoRange;
3137 if (auto *TD = TN.getAsTemplateDecl())
3138 SemaRef.Diag(TD->getLocation(), diag::note_template_decl_here);
3139
3140 T = SemaRef.Context.IntTy;
3141 D.setInvalidType(true);
3142 } else if (!HaveTrailing &&
3143 D.getContext() != DeclaratorContext::LambdaExprContext) {
3144 // If there was a trailing return type, we already got
3145 // warn_cxx98_compat_trailing_return_type in the parser.
3146 SemaRef.Diag(AutoRange.getBegin(),
3147 D.getContext() ==
3148 DeclaratorContext::LambdaExprParameterContext
3149 ? diag::warn_cxx11_compat_generic_lambda
3150 : IsDeducedReturnType
3151 ? diag::warn_cxx11_compat_deduced_return_type
3152 : diag::warn_cxx98_compat_auto_type_specifier)
3153 << AutoRange;
3154 }
3155 }
3156
3157 if (SemaRef.getLangOpts().CPlusPlus &&
3158 OwnedTagDecl && OwnedTagDecl->isCompleteDefinition()) {
3159 // Check the contexts where C++ forbids the declaration of a new class
3160 // or enumeration in a type-specifier-seq.
3161 unsigned DiagID = 0;
3162 switch (D.getContext()) {
3163 case DeclaratorContext::TrailingReturnContext:
3164 case DeclaratorContext::TrailingReturnVarContext:
3165 // Class and enumeration definitions are syntactically not allowed in
3166 // trailing return types.
3167 llvm_unreachable("parser should not have allowed this")::llvm::llvm_unreachable_internal("parser should not have allowed this"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3167)
;
3168 break;
3169 case DeclaratorContext::FileContext:
3170 case DeclaratorContext::MemberContext:
3171 case DeclaratorContext::BlockContext:
3172 case DeclaratorContext::ForContext:
3173 case DeclaratorContext::InitStmtContext:
3174 case DeclaratorContext::BlockLiteralContext:
3175 case DeclaratorContext::LambdaExprContext:
3176 // C++11 [dcl.type]p3:
3177 // A type-specifier-seq shall not define a class or enumeration unless
3178 // it appears in the type-id of an alias-declaration (7.1.3) that is not
3179 // the declaration of a template-declaration.
3180 case DeclaratorContext::AliasDeclContext:
3181 break;
3182 case DeclaratorContext::AliasTemplateContext:
3183 DiagID = diag::err_type_defined_in_alias_template;
3184 break;
3185 case DeclaratorContext::TypeNameContext:
3186 case DeclaratorContext::FunctionalCastContext:
3187 case DeclaratorContext::ConversionIdContext:
3188 case DeclaratorContext::TemplateParamContext:
3189 case DeclaratorContext::CXXNewContext:
3190 case DeclaratorContext::CXXCatchContext:
3191 case DeclaratorContext::ObjCCatchContext:
3192 case DeclaratorContext::TemplateArgContext:
3193 case DeclaratorContext::TemplateTypeArgContext:
3194 DiagID = diag::err_type_defined_in_type_specifier;
3195 break;
3196 case DeclaratorContext::PrototypeContext:
3197 case DeclaratorContext::LambdaExprParameterContext:
3198 case DeclaratorContext::ObjCParameterContext:
3199 case DeclaratorContext::ObjCResultContext:
3200 case DeclaratorContext::KNRTypeListContext:
3201 // C++ [dcl.fct]p6:
3202 // Types shall not be defined in return or parameter types.
3203 DiagID = diag::err_type_defined_in_param_type;
3204 break;
3205 case DeclaratorContext::ConditionContext:
3206 // C++ 6.4p2:
3207 // The type-specifier-seq shall not contain typedef and shall not declare
3208 // a new class or enumeration.
3209 DiagID = diag::err_type_defined_in_condition;
3210 break;
3211 }
3212
3213 if (DiagID != 0) {
3214 SemaRef.Diag(OwnedTagDecl->getLocation(), DiagID)
3215 << SemaRef.Context.getTypeDeclType(OwnedTagDecl);
3216 D.setInvalidType(true);
3217 }
3218 }
3219
3220 assert(!T.isNull() && "This function should not return a null type")((!T.isNull() && "This function should not return a null type"
) ? static_cast<void> (0) : __assert_fail ("!T.isNull() && \"This function should not return a null type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3220, __PRETTY_FUNCTION__))
;
3221 return T;
3222}
3223
3224/// Produce an appropriate diagnostic for an ambiguity between a function
3225/// declarator and a C++ direct-initializer.
3226static void warnAboutAmbiguousFunction(Sema &S, Declarator &D,
3227 DeclaratorChunk &DeclType, QualType RT) {
3228 const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun;
3229 assert(FTI.isAmbiguous && "no direct-initializer / function ambiguity")((FTI.isAmbiguous && "no direct-initializer / function ambiguity"
) ? static_cast<void> (0) : __assert_fail ("FTI.isAmbiguous && \"no direct-initializer / function ambiguity\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3229, __PRETTY_FUNCTION__))
;
3230
3231 // If the return type is void there is no ambiguity.
3232 if (RT->isVoidType())
3233 return;
3234
3235 // An initializer for a non-class type can have at most one argument.
3236 if (!RT->isRecordType() && FTI.NumParams > 1)
3237 return;
3238
3239 // An initializer for a reference must have exactly one argument.
3240 if (RT->isReferenceType() && FTI.NumParams != 1)
3241 return;
3242
3243 // Only warn if this declarator is declaring a function at block scope, and
3244 // doesn't have a storage class (such as 'extern') specified.
3245 if (!D.isFunctionDeclarator() ||
3246 D.getFunctionDefinitionKind() != FDK_Declaration ||
3247 !S.CurContext->isFunctionOrMethod() ||
3248 D.getDeclSpec().getStorageClassSpec()
3249 != DeclSpec::SCS_unspecified)
3250 return;
3251
3252 // Inside a condition, a direct initializer is not permitted. We allow one to
3253 // be parsed in order to give better diagnostics in condition parsing.
3254 if (D.getContext() == DeclaratorContext::ConditionContext)
3255 return;
3256
3257 SourceRange ParenRange(DeclType.Loc, DeclType.EndLoc);
3258
3259 S.Diag(DeclType.Loc,
3260 FTI.NumParams ? diag::warn_parens_disambiguated_as_function_declaration
3261 : diag::warn_empty_parens_are_function_decl)
3262 << ParenRange;
3263
3264 // If the declaration looks like:
3265 // T var1,
3266 // f();
3267 // and name lookup finds a function named 'f', then the ',' was
3268 // probably intended to be a ';'.
3269 if (!D.isFirstDeclarator() && D.getIdentifier()) {
3270 FullSourceLoc Comma(D.getCommaLoc(), S.SourceMgr);
3271 FullSourceLoc Name(D.getIdentifierLoc(), S.SourceMgr);
3272 if (Comma.getFileID() != Name.getFileID() ||
3273 Comma.getSpellingLineNumber() != Name.getSpellingLineNumber()) {
3274 LookupResult Result(S, D.getIdentifier(), SourceLocation(),
3275 Sema::LookupOrdinaryName);
3276 if (S.LookupName(Result, S.getCurScope()))
3277 S.Diag(D.getCommaLoc(), diag::note_empty_parens_function_call)
3278 << FixItHint::CreateReplacement(D.getCommaLoc(), ";")
3279 << D.getIdentifier();
3280 Result.suppressDiagnostics();
3281 }
3282 }
3283
3284 if (FTI.NumParams > 0) {
3285 // For a declaration with parameters, eg. "T var(T());", suggest adding
3286 // parens around the first parameter to turn the declaration into a
3287 // variable declaration.
3288 SourceRange Range = FTI.Params[0].Param->getSourceRange();
3289 SourceLocation B = Range.getBegin();
3290 SourceLocation E = S.getLocForEndOfToken(Range.getEnd());
3291 // FIXME: Maybe we should suggest adding braces instead of parens
3292 // in C++11 for classes that don't have an initializer_list constructor.
3293 S.Diag(B, diag::note_additional_parens_for_variable_declaration)
3294 << FixItHint::CreateInsertion(B, "(")
3295 << FixItHint::CreateInsertion(E, ")");
3296 } else {
3297 // For a declaration without parameters, eg. "T var();", suggest replacing
3298 // the parens with an initializer to turn the declaration into a variable
3299 // declaration.
3300 const CXXRecordDecl *RD = RT->getAsCXXRecordDecl();
3301
3302 // Empty parens mean value-initialization, and no parens mean
3303 // default initialization. These are equivalent if the default
3304 // constructor is user-provided or if zero-initialization is a
3305 // no-op.
3306 if (RD && RD->hasDefinition() &&
3307 (RD->isEmpty() || RD->hasUserProvidedDefaultConstructor()))
3308 S.Diag(DeclType.Loc, diag::note_empty_parens_default_ctor)
3309 << FixItHint::CreateRemoval(ParenRange);
3310 else {
3311 std::string Init =
3312 S.getFixItZeroInitializerForType(RT, ParenRange.getBegin());
3313 if (Init.empty() && S.LangOpts.CPlusPlus11)
3314 Init = "{}";
3315 if (!Init.empty())
3316 S.Diag(DeclType.Loc, diag::note_empty_parens_zero_initialize)
3317 << FixItHint::CreateReplacement(ParenRange, Init);
3318 }
3319 }
3320}
3321
3322/// Produce an appropriate diagnostic for a declarator with top-level
3323/// parentheses.
3324static void warnAboutRedundantParens(Sema &S, Declarator &D, QualType T) {
3325 DeclaratorChunk &Paren = D.getTypeObject(D.getNumTypeObjects() - 1);
3326 assert(Paren.Kind == DeclaratorChunk::Paren &&((Paren.Kind == DeclaratorChunk::Paren && "do not have redundant top-level parentheses"
) ? static_cast<void> (0) : __assert_fail ("Paren.Kind == DeclaratorChunk::Paren && \"do not have redundant top-level parentheses\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3327, __PRETTY_FUNCTION__))
3327 "do not have redundant top-level parentheses")((Paren.Kind == DeclaratorChunk::Paren && "do not have redundant top-level parentheses"
) ? static_cast<void> (0) : __assert_fail ("Paren.Kind == DeclaratorChunk::Paren && \"do not have redundant top-level parentheses\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3327, __PRETTY_FUNCTION__))
;
3328
3329 // This is a syntactic check; we're not interested in cases that arise
3330 // during template instantiation.
3331 if (S.inTemplateInstantiation())
3332 return;
3333
3334 // Check whether this could be intended to be a construction of a temporary
3335 // object in C++ via a function-style cast.
3336 bool CouldBeTemporaryObject =
3337 S.getLangOpts().CPlusPlus && D.isExpressionContext() &&
3338 !D.isInvalidType() && D.getIdentifier() &&
3339 D.getDeclSpec().getParsedSpecifiers() == DeclSpec::PQ_TypeSpecifier &&
3340 (T->isRecordType() || T->isDependentType()) &&
3341 D.getDeclSpec().getTypeQualifiers() == 0 && D.isFirstDeclarator();
3342
3343 bool StartsWithDeclaratorId = true;
3344 for (auto &C : D.type_objects()) {
3345 switch (C.Kind) {
3346 case DeclaratorChunk::Paren:
3347 if (&C == &Paren)
3348 continue;
3349 LLVM_FALLTHROUGH[[gnu::fallthrough]];
3350 case DeclaratorChunk::Pointer:
3351 StartsWithDeclaratorId = false;
3352 continue;
3353
3354 case DeclaratorChunk::Array:
3355 if (!C.Arr.NumElts)
3356 CouldBeTemporaryObject = false;
3357 continue;
3358
3359 case DeclaratorChunk::Reference:
3360 // FIXME: Suppress the warning here if there is no initializer; we're
3361 // going to give an error anyway.
3362 // We assume that something like 'T (&x) = y;' is highly likely to not
3363 // be intended to be a temporary object.
3364 CouldBeTemporaryObject = false;
3365 StartsWithDeclaratorId = false;
3366 continue;
3367
3368 case DeclaratorChunk::Function:
3369 // In a new-type-id, function chunks require parentheses.
3370 if (D.getContext() == DeclaratorContext::CXXNewContext)
3371 return;
3372 // FIXME: "A(f())" deserves a vexing-parse warning, not just a
3373 // redundant-parens warning, but we don't know whether the function
3374 // chunk was syntactically valid as an expression here.
3375 CouldBeTemporaryObject = false;
3376 continue;
3377
3378 case DeclaratorChunk::BlockPointer:
3379 case DeclaratorChunk::MemberPointer:
3380 case DeclaratorChunk::Pipe:
3381 // These cannot appear in expressions.
3382 CouldBeTemporaryObject = false;
3383 StartsWithDeclaratorId = false;
3384 continue;
3385 }
3386 }
3387
3388 // FIXME: If there is an initializer, assume that this is not intended to be
3389 // a construction of a temporary object.
3390
3391 // Check whether the name has already been declared; if not, this is not a
3392 // function-style cast.
3393 if (CouldBeTemporaryObject) {
3394 LookupResult Result(S, D.getIdentifier(), SourceLocation(),
3395 Sema::LookupOrdinaryName);
3396 if (!S.LookupName(Result, S.getCurScope()))
3397 CouldBeTemporaryObject = false;
3398 Result.suppressDiagnostics();
3399 }
3400
3401 SourceRange ParenRange(Paren.Loc, Paren.EndLoc);
3402
3403 if (!CouldBeTemporaryObject) {
3404 // If we have A (::B), the parentheses affect the meaning of the program.
3405 // Suppress the warning in that case. Don't bother looking at the DeclSpec
3406 // here: even (e.g.) "int ::x" is visually ambiguous even though it's
3407 // formally unambiguous.
3408 if (StartsWithDeclaratorId && D.getCXXScopeSpec().isValid()) {
3409 for (NestedNameSpecifier *NNS = D.getCXXScopeSpec().getScopeRep(); NNS;
3410 NNS = NNS->getPrefix()) {
3411 if (NNS->getKind() == NestedNameSpecifier::Global)
3412 return;
3413 }
3414 }
3415
3416 S.Diag(Paren.Loc, diag::warn_redundant_parens_around_declarator)
3417 << ParenRange << FixItHint::CreateRemoval(Paren.Loc)
3418 << FixItHint::CreateRemoval(Paren.EndLoc);
3419 return;
3420 }
3421
3422 S.Diag(Paren.Loc, diag::warn_parens_disambiguated_as_variable_declaration)
3423 << ParenRange << D.getIdentifier();
3424 auto *RD = T->getAsCXXRecordDecl();
3425 if (!RD || !RD->hasDefinition() || RD->hasNonTrivialDestructor())
3426 S.Diag(Paren.Loc, diag::note_raii_guard_add_name)
3427 << FixItHint::CreateInsertion(Paren.Loc, " varname") << T
3428 << D.getIdentifier();
3429 // FIXME: A cast to void is probably a better suggestion in cases where it's
3430 // valid (when there is no initializer and we're not in a condition).
3431 S.Diag(D.getBeginLoc(), diag::note_function_style_cast_add_parentheses)
3432 << FixItHint::CreateInsertion(D.getBeginLoc(), "(")
3433 << FixItHint::CreateInsertion(S.getLocForEndOfToken(D.getEndLoc()), ")");
3434 S.Diag(Paren.Loc, diag::note_remove_parens_for_variable_declaration)
3435 << FixItHint::CreateRemoval(Paren.Loc)
3436 << FixItHint::CreateRemoval(Paren.EndLoc);
3437}
3438
3439/// Helper for figuring out the default CC for a function declarator type. If
3440/// this is the outermost chunk, then we can determine the CC from the
3441/// declarator context. If not, then this could be either a member function
3442/// type or normal function type.
3443static CallingConv getCCForDeclaratorChunk(
3444 Sema &S, Declarator &D, const ParsedAttributesView &AttrList,
3445 const DeclaratorChunk::FunctionTypeInfo &FTI, unsigned ChunkIndex) {
3446 assert(D.getTypeObject(ChunkIndex).Kind == DeclaratorChunk::Function)((D.getTypeObject(ChunkIndex).Kind == DeclaratorChunk::Function
) ? static_cast<void> (0) : __assert_fail ("D.getTypeObject(ChunkIndex).Kind == DeclaratorChunk::Function"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3446, __PRETTY_FUNCTION__))
;
3447
3448 // Check for an explicit CC attribute.
3449 for (const ParsedAttr &AL : AttrList) {
3450 switch (AL.getKind()) {
3451 CALLING_CONV_ATTRS_CASELISTcase ParsedAttr::AT_CDecl: case ParsedAttr::AT_FastCall: case
ParsedAttr::AT_StdCall: case ParsedAttr::AT_ThisCall: case ParsedAttr
::AT_RegCall: case ParsedAttr::AT_Pascal: case ParsedAttr::AT_SwiftCall
: case ParsedAttr::AT_VectorCall: case ParsedAttr::AT_AArch64VectorPcs
: case ParsedAttr::AT_MSABI: case ParsedAttr::AT_SysVABI: case
ParsedAttr::AT_Pcs: case ParsedAttr::AT_IntelOclBicc: case ParsedAttr
::AT_PreserveMost: case ParsedAttr::AT_PreserveAll
: {
3452 // Ignore attributes that don't validate or can't apply to the
3453 // function type. We'll diagnose the failure to apply them in
3454 // handleFunctionTypeAttr.
3455 CallingConv CC;
3456 if (!S.CheckCallingConvAttr(AL, CC) &&
3457 (!FTI.isVariadic || supportsVariadicCall(CC))) {
3458 return CC;
3459 }
3460 break;
3461 }
3462
3463 default:
3464 break;
3465 }
3466 }
3467
3468 bool IsCXXInstanceMethod = false;
3469
3470 if (S.getLangOpts().CPlusPlus) {
3471 // Look inwards through parentheses to see if this chunk will form a
3472 // member pointer type or if we're the declarator. Any type attributes
3473 // between here and there will override the CC we choose here.
3474 unsigned I = ChunkIndex;
3475 bool FoundNonParen = false;
3476 while (I && !FoundNonParen) {
3477 --I;
3478 if (D.getTypeObject(I).Kind != DeclaratorChunk::Paren)
3479 FoundNonParen = true;
3480 }
3481
3482 if (FoundNonParen) {
3483 // If we're not the declarator, we're a regular function type unless we're
3484 // in a member pointer.
3485 IsCXXInstanceMethod =
3486 D.getTypeObject(I).Kind == DeclaratorChunk::MemberPointer;
3487 } else if (D.getContext() == DeclaratorContext::LambdaExprContext) {
3488 // This can only be a call operator for a lambda, which is an instance
3489 // method.
3490 IsCXXInstanceMethod = true;
3491 } else {
3492 // We're the innermost decl chunk, so must be a function declarator.
3493 assert(D.isFunctionDeclarator())((D.isFunctionDeclarator()) ? static_cast<void> (0) : __assert_fail
("D.isFunctionDeclarator()", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3493, __PRETTY_FUNCTION__))
;
3494
3495 // If we're inside a record, we're declaring a method, but it could be
3496 // explicitly or implicitly static.
3497 IsCXXInstanceMethod =
3498 D.isFirstDeclarationOfMember() &&
3499 D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef &&
3500 !D.isStaticMember();
3501 }
3502 }
3503
3504 CallingConv CC = S.Context.getDefaultCallingConvention(FTI.isVariadic,
3505 IsCXXInstanceMethod);
3506
3507 // Attribute AT_OpenCLKernel affects the calling convention for SPIR
3508 // and AMDGPU targets, hence it cannot be treated as a calling
3509 // convention attribute. This is the simplest place to infer
3510 // calling convention for OpenCL kernels.
3511 if (S.getLangOpts().OpenCL) {
3512 for (const ParsedAttr &AL : D.getDeclSpec().getAttributes()) {
3513 if (AL.getKind() == ParsedAttr::AT_OpenCLKernel) {
3514 CC = CC_OpenCLKernel;
3515 break;
3516 }
3517 }
3518 }
3519
3520 return CC;
3521}
3522
3523namespace {
3524 /// A simple notion of pointer kinds, which matches up with the various
3525 /// pointer declarators.
3526 enum class SimplePointerKind {
3527 Pointer,
3528 BlockPointer,
3529 MemberPointer,
3530 Array,
3531 };
3532} // end anonymous namespace
3533
3534IdentifierInfo *Sema::getNullabilityKeyword(NullabilityKind nullability) {
3535 switch (nullability) {
3536 case NullabilityKind::NonNull:
3537 if (!Ident__Nonnull)
3538 Ident__Nonnull = PP.getIdentifierInfo("_Nonnull");
3539 return Ident__Nonnull;
3540
3541 case NullabilityKind::Nullable:
3542 if (!Ident__Nullable)
3543 Ident__Nullable = PP.getIdentifierInfo("_Nullable");
3544 return Ident__Nullable;
3545
3546 case NullabilityKind::Unspecified:
3547 if (!Ident__Null_unspecified)
3548 Ident__Null_unspecified = PP.getIdentifierInfo("_Null_unspecified");
3549 return Ident__Null_unspecified;
3550 }
3551 llvm_unreachable("Unknown nullability kind.")::llvm::llvm_unreachable_internal("Unknown nullability kind."
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3551)
;
3552}
3553
3554/// Retrieve the identifier "NSError".
3555IdentifierInfo *Sema::getNSErrorIdent() {
3556 if (!Ident_NSError)
3557 Ident_NSError = PP.getIdentifierInfo("NSError");
3558
3559 return Ident_NSError;
3560}
3561
3562/// Check whether there is a nullability attribute of any kind in the given
3563/// attribute list.
3564static bool hasNullabilityAttr(const ParsedAttributesView &attrs) {
3565 for (const ParsedAttr &AL : attrs) {
3566 if (AL.getKind() == ParsedAttr::AT_TypeNonNull ||
3567 AL.getKind() == ParsedAttr::AT_TypeNullable ||
3568 AL.getKind() == ParsedAttr::AT_TypeNullUnspecified)
3569 return true;
3570 }
3571
3572 return false;
3573}
3574
3575namespace {
3576 /// Describes the kind of a pointer a declarator describes.
3577 enum class PointerDeclaratorKind {
3578 // Not a pointer.
3579 NonPointer,
3580 // Single-level pointer.
3581 SingleLevelPointer,
3582 // Multi-level pointer (of any pointer kind).
3583 MultiLevelPointer,
3584 // CFFooRef*
3585 MaybePointerToCFRef,
3586 // CFErrorRef*
3587 CFErrorRefPointer,
3588 // NSError**
3589 NSErrorPointerPointer,
3590 };
3591
3592 /// Describes a declarator chunk wrapping a pointer that marks inference as
3593 /// unexpected.
3594 // These values must be kept in sync with diagnostics.
3595 enum class PointerWrappingDeclaratorKind {
3596 /// Pointer is top-level.
3597 None = -1,
3598 /// Pointer is an array element.
3599 Array = 0,
3600 /// Pointer is the referent type of a C++ reference.
3601 Reference = 1
3602 };
3603} // end anonymous namespace
3604
3605/// Classify the given declarator, whose type-specified is \c type, based on
3606/// what kind of pointer it refers to.
3607///
3608/// This is used to determine the default nullability.
3609static PointerDeclaratorKind
3610classifyPointerDeclarator(Sema &S, QualType type, Declarator &declarator,
3611 PointerWrappingDeclaratorKind &wrappingKind) {
3612 unsigned numNormalPointers = 0;
3613
3614 // For any dependent type, we consider it a non-pointer.
3615 if (type->isDependentType())
3616 return PointerDeclaratorKind::NonPointer;
3617
3618 // Look through the declarator chunks to identify pointers.
3619 for (unsigned i = 0, n = declarator.getNumTypeObjects(); i != n; ++i) {
3620 DeclaratorChunk &chunk = declarator.getTypeObject(i);
3621 switch (chunk.Kind) {
3622 case DeclaratorChunk::Array:
3623 if (numNormalPointers == 0)
3624 wrappingKind = PointerWrappingDeclaratorKind::Array;
3625 break;
3626
3627 case DeclaratorChunk::Function:
3628 case DeclaratorChunk::Pipe:
3629 break;
3630
3631 case DeclaratorChunk::BlockPointer:
3632 case DeclaratorChunk::MemberPointer:
3633 return numNormalPointers > 0 ? PointerDeclaratorKind::MultiLevelPointer
3634 : PointerDeclaratorKind::SingleLevelPointer;
3635
3636 case DeclaratorChunk::Paren:
3637 break;
3638
3639 case DeclaratorChunk::Reference:
3640 if (numNormalPointers == 0)
3641 wrappingKind = PointerWrappingDeclaratorKind::Reference;
3642 break;
3643
3644 case DeclaratorChunk::Pointer:
3645 ++numNormalPointers;
3646 if (numNormalPointers > 2)
3647 return PointerDeclaratorKind::MultiLevelPointer;
3648 break;
3649 }
3650 }
3651
3652 // Then, dig into the type specifier itself.
3653 unsigned numTypeSpecifierPointers = 0;
3654 do {
3655 // Decompose normal pointers.
3656 if (auto ptrType = type->getAs<PointerType>()) {
3657 ++numNormalPointers;
3658
3659 if (numNormalPointers > 2)
3660 return PointerDeclaratorKind::MultiLevelPointer;
3661
3662 type = ptrType->getPointeeType();
3663 ++numTypeSpecifierPointers;
3664 continue;
3665 }
3666
3667 // Decompose block pointers.
3668 if (type->getAs<BlockPointerType>()) {
3669 return numNormalPointers > 0 ? PointerDeclaratorKind::MultiLevelPointer
3670 : PointerDeclaratorKind::SingleLevelPointer;
3671 }
3672
3673 // Decompose member pointers.
3674 if (type->getAs<MemberPointerType>()) {
3675 return numNormalPointers > 0 ? PointerDeclaratorKind::MultiLevelPointer
3676 : PointerDeclaratorKind::SingleLevelPointer;
3677 }
3678
3679 // Look at Objective-C object pointers.
3680 if (auto objcObjectPtr = type->getAs<ObjCObjectPointerType>()) {
3681 ++numNormalPointers;
3682 ++numTypeSpecifierPointers;
3683
3684 // If this is NSError**, report that.
3685 if (auto objcClassDecl = objcObjectPtr->getInterfaceDecl()) {
3686 if (objcClassDecl->getIdentifier() == S.getNSErrorIdent() &&
3687 numNormalPointers == 2 && numTypeSpecifierPointers < 2) {
3688 return PointerDeclaratorKind::NSErrorPointerPointer;
3689 }
3690 }
3691
3692 break;
3693 }
3694
3695 // Look at Objective-C class types.
3696 if (auto objcClass = type->getAs<ObjCInterfaceType>()) {
3697 if (objcClass->getInterface()->getIdentifier() == S.getNSErrorIdent()) {
3698 if (numNormalPointers == 2 && numTypeSpecifierPointers < 2)
3699 return PointerDeclaratorKind::NSErrorPointerPointer;
3700 }
3701
3702 break;
3703 }
3704
3705 // If at this point we haven't seen a pointer, we won't see one.
3706 if (numNormalPointers == 0)
3707 return PointerDeclaratorKind::NonPointer;
3708
3709 if (auto recordType = type->getAs<RecordType>()) {
3710 RecordDecl *recordDecl = recordType->getDecl();
3711
3712 bool isCFError = false;
3713 if (S.CFError) {
3714 // If we already know about CFError, test it directly.
3715 isCFError = (S.CFError == recordDecl);
3716 } else {
3717 // Check whether this is CFError, which we identify based on its bridge
3718 // to NSError. CFErrorRef used to be declared with "objc_bridge" but is
3719 // now declared with "objc_bridge_mutable", so look for either one of
3720 // the two attributes.
3721 if (recordDecl->getTagKind() == TTK_Struct && numNormalPointers > 0) {
3722 IdentifierInfo *bridgedType = nullptr;
3723 if (auto bridgeAttr = recordDecl->getAttr<ObjCBridgeAttr>())
3724 bridgedType = bridgeAttr->getBridgedType();
3725 else if (auto bridgeAttr =
3726 recordDecl->getAttr<ObjCBridgeMutableAttr>())
3727 bridgedType = bridgeAttr->getBridgedType();
3728
3729 if (bridgedType == S.getNSErrorIdent()) {
3730 S.CFError = recordDecl;
3731 isCFError = true;
3732 }
3733 }
3734 }
3735
3736 // If this is CFErrorRef*, report it as such.
3737 if (isCFError && numNormalPointers == 2 && numTypeSpecifierPointers < 2) {
3738 return PointerDeclaratorKind::CFErrorRefPointer;
3739 }
3740 break;
3741 }
3742
3743 break;
3744 } while (true);
3745
3746 switch (numNormalPointers) {
3747 case 0:
3748 return PointerDeclaratorKind::NonPointer;
3749
3750 case 1:
3751 return PointerDeclaratorKind::SingleLevelPointer;
3752
3753 case 2:
3754 return PointerDeclaratorKind::MaybePointerToCFRef;
3755
3756 default:
3757 return PointerDeclaratorKind::MultiLevelPointer;
3758 }
3759}
3760
3761static FileID getNullabilityCompletenessCheckFileID(Sema &S,
3762 SourceLocation loc) {
3763 // If we're anywhere in a function, method, or closure context, don't perform
3764 // completeness checks.
3765 for (DeclContext *ctx = S.CurContext; ctx; ctx = ctx->getParent()) {
3766 if (ctx->isFunctionOrMethod())
3767 return FileID();
3768
3769 if (ctx->isFileContext())
3770 break;
3771 }
3772
3773 // We only care about the expansion location.
3774 loc = S.SourceMgr.getExpansionLoc(loc);
3775 FileID file = S.SourceMgr.getFileID(loc);
3776 if (file.isInvalid())
3777 return FileID();
3778
3779 // Retrieve file information.
3780 bool invalid = false;
3781 const SrcMgr::SLocEntry &sloc = S.SourceMgr.getSLocEntry(file, &invalid);
3782 if (invalid || !sloc.isFile())
3783 return FileID();
3784
3785 // We don't want to perform completeness checks on the main file or in
3786 // system headers.
3787 const SrcMgr::FileInfo &fileInfo = sloc.getFile();
3788 if (fileInfo.getIncludeLoc().isInvalid())
3789 return FileID();
3790 if (fileInfo.getFileCharacteristic() != SrcMgr::C_User &&
3791 S.Diags.getSuppressSystemWarnings()) {
3792 return FileID();
3793 }
3794
3795 return file;
3796}
3797
3798/// Creates a fix-it to insert a C-style nullability keyword at \p pointerLoc,
3799/// taking into account whitespace before and after.
3800static void fixItNullability(Sema &S, DiagnosticBuilder &Diag,
3801 SourceLocation PointerLoc,
3802 NullabilityKind Nullability) {
3803 assert(PointerLoc.isValid())((PointerLoc.isValid()) ? static_cast<void> (0) : __assert_fail
("PointerLoc.isValid()", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3803, __PRETTY_FUNCTION__))
;
3804 if (PointerLoc.isMacroID())
3805 return;
3806
3807 SourceLocation FixItLoc = S.getLocForEndOfToken(PointerLoc);
3808 if (!FixItLoc.isValid() || FixItLoc == PointerLoc)
3809 return;
3810
3811 const char *NextChar = S.SourceMgr.getCharacterData(FixItLoc);
3812 if (!NextChar)
3813 return;
3814
3815 SmallString<32> InsertionTextBuf{" "};
3816 InsertionTextBuf += getNullabilitySpelling(Nullability);
3817 InsertionTextBuf += " ";
3818 StringRef InsertionText = InsertionTextBuf.str();
3819
3820 if (isWhitespace(*NextChar)) {
3821 InsertionText = InsertionText.drop_back();
3822 } else if (NextChar[-1] == '[') {
3823 if (NextChar[0] == ']')
3824 InsertionText = InsertionText.drop_back().drop_front();
3825 else
3826 InsertionText = InsertionText.drop_front();
3827 } else if (!isIdentifierBody(NextChar[0], /*allow dollar*/true) &&
3828 !isIdentifierBody(NextChar[-1], /*allow dollar*/true)) {
3829 InsertionText = InsertionText.drop_back().drop_front();
3830 }
3831
3832 Diag << FixItHint::CreateInsertion(FixItLoc, InsertionText);
3833}
3834
3835static void emitNullabilityConsistencyWarning(Sema &S,
3836 SimplePointerKind PointerKind,
3837 SourceLocation PointerLoc,
3838 SourceLocation PointerEndLoc) {
3839 assert(PointerLoc.isValid())((PointerLoc.isValid()) ? static_cast<void> (0) : __assert_fail
("PointerLoc.isValid()", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3839, __PRETTY_FUNCTION__))
;
3840
3841 if (PointerKind == SimplePointerKind::Array) {
3842 S.Diag(PointerLoc, diag::warn_nullability_missing_array);
3843 } else {
3844 S.Diag(PointerLoc, diag::warn_nullability_missing)
3845 << static_cast<unsigned>(PointerKind);
3846 }
3847
3848 auto FixItLoc = PointerEndLoc.isValid() ? PointerEndLoc : PointerLoc;
3849 if (FixItLoc.isMacroID())
3850 return;
3851
3852 auto addFixIt = [&](NullabilityKind Nullability) {
3853 auto Diag = S.Diag(FixItLoc, diag::note_nullability_fix_it);
3854 Diag << static_cast<unsigned>(Nullability);
3855 Diag << static_cast<unsigned>(PointerKind);
3856 fixItNullability(S, Diag, FixItLoc, Nullability);
3857 };
3858 addFixIt(NullabilityKind::Nullable);
3859 addFixIt(NullabilityKind::NonNull);
3860}
3861
3862/// Complains about missing nullability if the file containing \p pointerLoc
3863/// has other uses of nullability (either the keywords or the \c assume_nonnull
3864/// pragma).
3865///
3866/// If the file has \e not seen other uses of nullability, this particular
3867/// pointer is saved for possible later diagnosis. See recordNullabilitySeen().
3868static void
3869checkNullabilityConsistency(Sema &S, SimplePointerKind pointerKind,
3870 SourceLocation pointerLoc,
3871 SourceLocation pointerEndLoc = SourceLocation()) {
3872 // Determine which file we're performing consistency checking for.
3873 FileID file = getNullabilityCompletenessCheckFileID(S, pointerLoc);
3874 if (file.isInvalid())
3875 return;
3876
3877 // If we haven't seen any type nullability in this file, we won't warn now
3878 // about anything.
3879 FileNullability &fileNullability = S.NullabilityMap[file];
3880 if (!fileNullability.SawTypeNullability) {
3881 // If this is the first pointer declarator in the file, and the appropriate
3882 // warning is on, record it in case we need to diagnose it retroactively.
3883 diag::kind diagKind;
3884 if (pointerKind == SimplePointerKind::Array)
3885 diagKind = diag::warn_nullability_missing_array;
3886 else
3887 diagKind = diag::warn_nullability_missing;
3888
3889 if (fileNullability.PointerLoc.isInvalid() &&
3890 !S.Context.getDiagnostics().isIgnored(diagKind, pointerLoc)) {
3891 fileNullability.PointerLoc = pointerLoc;
3892 fileNullability.PointerEndLoc = pointerEndLoc;
3893 fileNullability.PointerKind = static_cast<unsigned>(pointerKind);
3894 }
3895
3896 return;
3897 }
3898
3899 // Complain about missing nullability.
3900 emitNullabilityConsistencyWarning(S, pointerKind, pointerLoc, pointerEndLoc);
3901}
3902
3903/// Marks that a nullability feature has been used in the file containing
3904/// \p loc.
3905///
3906/// If this file already had pointer types in it that were missing nullability,
3907/// the first such instance is retroactively diagnosed.
3908///
3909/// \sa checkNullabilityConsistency
3910static void recordNullabilitySeen(Sema &S, SourceLocation loc) {
3911 FileID file = getNullabilityCompletenessCheckFileID(S, loc);
3912 if (file.isInvalid())
3913 return;
3914
3915 FileNullability &fileNullability = S.NullabilityMap[file];
3916 if (fileNullability.SawTypeNullability)
3917 return;
3918 fileNullability.SawTypeNullability = true;
3919
3920 // If we haven't seen any type nullability before, now we have. Retroactively
3921 // diagnose the first unannotated pointer, if there was one.
3922 if (fileNullability.PointerLoc.isInvalid())
3923 return;
3924
3925 auto kind = static_cast<SimplePointerKind>(fileNullability.PointerKind);
3926 emitNullabilityConsistencyWarning(S, kind, fileNullability.PointerLoc,
3927 fileNullability.PointerEndLoc);
3928}
3929
3930/// Returns true if any of the declarator chunks before \p endIndex include a
3931/// level of indirection: array, pointer, reference, or pointer-to-member.
3932///
3933/// Because declarator chunks are stored in outer-to-inner order, testing
3934/// every chunk before \p endIndex is testing all chunks that embed the current
3935/// chunk as part of their type.
3936///
3937/// It is legal to pass the result of Declarator::getNumTypeObjects() as the
3938/// end index, in which case all chunks are tested.
3939static bool hasOuterPointerLikeChunk(const Declarator &D, unsigned endIndex) {
3940 unsigned i = endIndex;
3941 while (i != 0) {
3942 // Walk outwards along the declarator chunks.
3943 --i;
3944 const DeclaratorChunk &DC = D.getTypeObject(i);
3945 switch (DC.Kind) {
3946 case DeclaratorChunk::Paren:
3947 break;
3948 case DeclaratorChunk::Array:
3949 case DeclaratorChunk::Pointer:
3950 case DeclaratorChunk::Reference:
3951 case DeclaratorChunk::MemberPointer:
3952 return true;
3953 case DeclaratorChunk::Function:
3954 case DeclaratorChunk::BlockPointer:
3955 case DeclaratorChunk::Pipe:
3956 // These are invalid anyway, so just ignore.
3957 break;
3958 }
3959 }
3960 return false;
3961}
3962
3963static bool IsNoDerefableChunk(DeclaratorChunk Chunk) {
3964 return (Chunk.Kind == DeclaratorChunk::Pointer ||
3965 Chunk.Kind == DeclaratorChunk::Array);
3966}
3967
3968template<typename AttrT>
3969static AttrT *createSimpleAttr(ASTContext &Ctx, ParsedAttr &AL) {
3970 AL.setUsedAsTypeAttr();
3971 return ::new (Ctx) AttrT(Ctx, AL);
3972}
3973
3974static Attr *createNullabilityAttr(ASTContext &Ctx, ParsedAttr &Attr,
3975 NullabilityKind NK) {
3976 switch (NK) {
3977 case NullabilityKind::NonNull:
3978 return createSimpleAttr<TypeNonNullAttr>(Ctx, Attr);
3979
3980 case NullabilityKind::Nullable:
3981 return createSimpleAttr<TypeNullableAttr>(Ctx, Attr);
3982
3983 case NullabilityKind::Unspecified:
3984 return createSimpleAttr<TypeNullUnspecifiedAttr>(Ctx, Attr);
3985 }
3986 llvm_unreachable("unknown NullabilityKind")::llvm::llvm_unreachable_internal("unknown NullabilityKind", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 3986)
;
3987}
3988
3989// Diagnose whether this is a case with the multiple addr spaces.
3990// Returns true if this is an invalid case.
3991// ISO/IEC TR 18037 S5.3 (amending C99 6.7.3): "No type shall be qualified
3992// by qualifiers for two or more different address spaces."
3993static bool DiagnoseMultipleAddrSpaceAttributes(Sema &S, LangAS ASOld,
3994 LangAS ASNew,
3995 SourceLocation AttrLoc) {
3996 if (ASOld != LangAS::Default) {
3997 if (ASOld != ASNew) {
3998 S.Diag(AttrLoc, diag::err_attribute_address_multiple_qualifiers);
3999 return true;
4000 }
4001 // Emit a warning if they are identical; it's likely unintended.
4002 S.Diag(AttrLoc,
4003 diag::warn_attribute_address_multiple_identical_qualifiers);
4004 }
4005 return false;
4006}
4007
4008static TypeSourceInfo *
4009GetTypeSourceInfoForDeclarator(TypeProcessingState &State,
4010 QualType T, TypeSourceInfo *ReturnTypeInfo);
4011
4012static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
4013 QualType declSpecType,
4014 TypeSourceInfo *TInfo) {
4015 // The TypeSourceInfo that this function returns will not be a null type.
4016 // If there is an error, this function will fill in a dummy type as fallback.
4017 QualType T = declSpecType;
4018 Declarator &D = state.getDeclarator();
4019 Sema &S = state.getSema();
4020 ASTContext &Context = S.Context;
4021 const LangOptions &LangOpts = S.getLangOpts();
4022
4023 // The name we're declaring, if any.
4024 DeclarationName Name;
4025 if (D.getIdentifier())
4026 Name = D.getIdentifier();
4027
4028 // Does this declaration declare a typedef-name?
4029 bool IsTypedefName =
4030 D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef ||
4031 D.getContext() == DeclaratorContext::AliasDeclContext ||
4032 D.getContext() == DeclaratorContext::AliasTemplateContext;
4033
4034 // Does T refer to a function type with a cv-qualifier or a ref-qualifier?
4035 bool IsQualifiedFunction = T->isFunctionProtoType() &&
4036 (!T->castAs<FunctionProtoType>()->getMethodQuals().empty() ||
4037 T->castAs<FunctionProtoType>()->getRefQualifier() != RQ_None);
4038
4039 // If T is 'decltype(auto)', the only declarators we can have are parens
4040 // and at most one function declarator if this is a function declaration.
4041 // If T is a deduced class template specialization type, we can have no
4042 // declarator chunks at all.
4043 if (auto *DT = T->getAs<DeducedType>()) {
4044 const AutoType *AT = T->getAs<AutoType>();
4045 bool IsClassTemplateDeduction = isa<DeducedTemplateSpecializationType>(DT);
4046 if ((AT && AT->isDecltypeAuto()) || IsClassTemplateDeduction) {
4047 for (unsigned I = 0, E = D.getNumTypeObjects(); I != E; ++I) {
4048 unsigned Index = E - I - 1;
4049 DeclaratorChunk &DeclChunk = D.getTypeObject(Index);
4050 unsigned DiagId = IsClassTemplateDeduction
4051 ? diag::err_deduced_class_template_compound_type
4052 : diag::err_decltype_auto_compound_type;
4053 unsigned DiagKind = 0;
4054 switch (DeclChunk.Kind) {
4055 case DeclaratorChunk::Paren:
4056 // FIXME: Rejecting this is a little silly.
4057 if (IsClassTemplateDeduction) {
4058 DiagKind = 4;
4059 break;
4060 }
4061 continue;
4062 case DeclaratorChunk::Function: {
4063 if (IsClassTemplateDeduction) {
4064 DiagKind = 3;
4065 break;
4066 }
4067 unsigned FnIndex;
4068 if (D.isFunctionDeclarationContext() &&
4069 D.isFunctionDeclarator(FnIndex) && FnIndex == Index)
4070 continue;
4071 DiagId = diag::err_decltype_auto_function_declarator_not_declaration;
4072 break;
4073 }
4074 case DeclaratorChunk::Pointer:
4075 case DeclaratorChunk::BlockPointer:
4076 case DeclaratorChunk::MemberPointer:
4077 DiagKind = 0;
4078 break;
4079 case DeclaratorChunk::Reference:
4080 DiagKind = 1;
4081 break;
4082 case DeclaratorChunk::Array:
4083 DiagKind = 2;
4084 break;
4085 case DeclaratorChunk::Pipe:
4086 break;
4087 }
4088
4089 S.Diag(DeclChunk.Loc, DiagId) << DiagKind;
4090 D.setInvalidType(true);
4091 break;
4092 }
4093 }
4094 }
4095
4096 // Determine whether we should infer _Nonnull on pointer types.
4097 Optional<NullabilityKind> inferNullability;
4098 bool inferNullabilityCS = false;
4099 bool inferNullabilityInnerOnly = false;
4100 bool inferNullabilityInnerOnlyComplete = false;
4101
4102 // Are we in an assume-nonnull region?
4103 bool inAssumeNonNullRegion = false;
4104 SourceLocation assumeNonNullLoc = S.PP.getPragmaAssumeNonNullLoc();
4105 if (assumeNonNullLoc.isValid()) {
4106 inAssumeNonNullRegion = true;
4107 recordNullabilitySeen(S, assumeNonNullLoc);
4108 }
4109
4110 // Whether to complain about missing nullability specifiers or not.
4111 enum {
4112 /// Never complain.
4113 CAMN_No,
4114 /// Complain on the inner pointers (but not the outermost
4115 /// pointer).
4116 CAMN_InnerPointers,
4117 /// Complain about any pointers that don't have nullability
4118 /// specified or inferred.
4119 CAMN_Yes
4120 } complainAboutMissingNullability = CAMN_No;
4121 unsigned NumPointersRemaining = 0;
4122 auto complainAboutInferringWithinChunk = PointerWrappingDeclaratorKind::None;
4123
4124 if (IsTypedefName) {
4125 // For typedefs, we do not infer any nullability (the default),
4126 // and we only complain about missing nullability specifiers on
4127 // inner pointers.
4128 complainAboutMissingNullability = CAMN_InnerPointers;
4129
4130 if (T->canHaveNullability(/*ResultIfUnknown*/false) &&
4131 !T->getNullability(S.Context)) {
4132 // Note that we allow but don't require nullability on dependent types.
4133 ++NumPointersRemaining;
4134 }
4135
4136 for (unsigned i = 0, n = D.getNumTypeObjects(); i != n; ++i) {
4137 DeclaratorChunk &chunk = D.getTypeObject(i);
4138 switch (chunk.Kind) {
4139 case DeclaratorChunk::Array:
4140 case DeclaratorChunk::Function:
4141 case DeclaratorChunk::Pipe:
4142 break;
4143
4144 case DeclaratorChunk::BlockPointer:
4145 case DeclaratorChunk::MemberPointer:
4146 ++NumPointersRemaining;
4147 break;
4148
4149 case DeclaratorChunk::Paren:
4150 case DeclaratorChunk::Reference:
4151 continue;
4152
4153 case DeclaratorChunk::Pointer:
4154 ++NumPointersRemaining;
4155 continue;
4156 }
4157 }
4158 } else {
4159 bool isFunctionOrMethod = false;
4160 switch (auto context = state.getDeclarator().getContext()) {
4161 case DeclaratorContext::ObjCParameterContext:
4162 case DeclaratorContext::ObjCResultContext:
4163 case DeclaratorContext::PrototypeContext:
4164 case DeclaratorContext::TrailingReturnContext:
4165 case DeclaratorContext::TrailingReturnVarContext:
4166 isFunctionOrMethod = true;
4167 LLVM_FALLTHROUGH[[gnu::fallthrough]];
4168
4169 case DeclaratorContext::MemberContext:
4170 if (state.getDeclarator().isObjCIvar() && !isFunctionOrMethod) {
4171 complainAboutMissingNullability = CAMN_No;
4172 break;
4173 }
4174
4175 // Weak properties are inferred to be nullable.
4176 if (state.getDeclarator().isObjCWeakProperty() && inAssumeNonNullRegion) {
4177 inferNullability = NullabilityKind::Nullable;
4178 break;
4179 }
4180
4181 LLVM_FALLTHROUGH[[gnu::fallthrough]];
4182
4183 case DeclaratorContext::FileContext:
4184 case DeclaratorContext::KNRTypeListContext: {
4185 complainAboutMissingNullability = CAMN_Yes;
4186
4187 // Nullability inference depends on the type and declarator.
4188 auto wrappingKind = PointerWrappingDeclaratorKind::None;
4189 switch (classifyPointerDeclarator(S, T, D, wrappingKind)) {
4190 case PointerDeclaratorKind::NonPointer:
4191 case PointerDeclaratorKind::MultiLevelPointer:
4192 // Cannot infer nullability.
4193 break;
4194
4195 case PointerDeclaratorKind::SingleLevelPointer:
4196 // Infer _Nonnull if we are in an assumes-nonnull region.
4197 if (inAssumeNonNullRegion) {
4198 complainAboutInferringWithinChunk = wrappingKind;
4199 inferNullability = NullabilityKind::NonNull;
4200 inferNullabilityCS =
4201 (context == DeclaratorContext::ObjCParameterContext ||
4202 context == DeclaratorContext::ObjCResultContext);
4203 }
4204 break;
4205
4206 case PointerDeclaratorKind::CFErrorRefPointer:
4207 case PointerDeclaratorKind::NSErrorPointerPointer:
4208 // Within a function or method signature, infer _Nullable at both
4209 // levels.
4210 if (isFunctionOrMethod && inAssumeNonNullRegion)
4211 inferNullability = NullabilityKind::Nullable;
4212 break;
4213
4214 case PointerDeclaratorKind::MaybePointerToCFRef:
4215 if (isFunctionOrMethod) {
4216 // On pointer-to-pointer parameters marked cf_returns_retained or
4217 // cf_returns_not_retained, if the outer pointer is explicit then
4218 // infer the inner pointer as _Nullable.
4219 auto hasCFReturnsAttr =
4220 [](const ParsedAttributesView &AttrList) -> bool {
4221 return AttrList.hasAttribute(ParsedAttr::AT_CFReturnsRetained) ||
4222 AttrList.hasAttribute(ParsedAttr::AT_CFReturnsNotRetained);
4223 };
4224 if (const auto *InnermostChunk = D.getInnermostNonParenChunk()) {
4225 if (hasCFReturnsAttr(D.getAttributes()) ||
4226 hasCFReturnsAttr(InnermostChunk->getAttrs()) ||
4227 hasCFReturnsAttr(D.getDeclSpec().getAttributes())) {
4228 inferNullability = NullabilityKind::Nullable;
4229 inferNullabilityInnerOnly = true;
4230 }
4231 }
4232 }
4233 break;
4234 }
4235 break;
4236 }
4237
4238 case DeclaratorContext::ConversionIdContext:
4239 complainAboutMissingNullability = CAMN_Yes;
4240 break;
4241
4242 case DeclaratorContext::AliasDeclContext:
4243 case DeclaratorContext::AliasTemplateContext:
4244 case DeclaratorContext::BlockContext:
4245 case DeclaratorContext::BlockLiteralContext:
4246 case DeclaratorContext::ConditionContext:
4247 case DeclaratorContext::CXXCatchContext:
4248 case DeclaratorContext::CXXNewContext:
4249 case DeclaratorContext::ForContext:
4250 case DeclaratorContext::InitStmtContext:
4251 case DeclaratorContext::LambdaExprContext:
4252 case DeclaratorContext::LambdaExprParameterContext:
4253 case DeclaratorContext::ObjCCatchContext:
4254 case DeclaratorContext::TemplateParamContext:
4255 case DeclaratorContext::TemplateArgContext:
4256 case DeclaratorContext::TemplateTypeArgContext:
4257 case DeclaratorContext::TypeNameContext:
4258 case DeclaratorContext::FunctionalCastContext:
4259 // Don't infer in these contexts.
4260 break;
4261 }
4262 }
4263
4264 // Local function that returns true if its argument looks like a va_list.
4265 auto isVaList = [&S](QualType T) -> bool {
4266 auto *typedefTy = T->getAs<TypedefType>();
4267 if (!typedefTy)
4268 return false;
4269 TypedefDecl *vaListTypedef = S.Context.getBuiltinVaListDecl();
4270 do {
4271 if (typedefTy->getDecl() == vaListTypedef)
4272 return true;
4273 if (auto *name = typedefTy->getDecl()->getIdentifier())
4274 if (name->isStr("va_list"))
4275 return true;
4276 typedefTy = typedefTy->desugar()->getAs<TypedefType>();
4277 } while (typedefTy);
4278 return false;
4279 };
4280
4281 // Local function that checks the nullability for a given pointer declarator.
4282 // Returns true if _Nonnull was inferred.
4283 auto inferPointerNullability =
4284 [&](SimplePointerKind pointerKind, SourceLocation pointerLoc,
4285 SourceLocation pointerEndLoc,
4286 ParsedAttributesView &attrs, AttributePool &Pool) -> ParsedAttr * {
4287 // We've seen a pointer.
4288 if (NumPointersRemaining > 0)
4289 --NumPointersRemaining;
4290
4291 // If a nullability attribute is present, there's nothing to do.
4292 if (hasNullabilityAttr(attrs))
4293 return nullptr;
4294
4295 // If we're supposed to infer nullability, do so now.
4296 if (inferNullability && !inferNullabilityInnerOnlyComplete) {
4297 ParsedAttr::Syntax syntax = inferNullabilityCS
4298 ? ParsedAttr::AS_ContextSensitiveKeyword
4299 : ParsedAttr::AS_Keyword;
4300 ParsedAttr *nullabilityAttr = Pool.create(
4301 S.getNullabilityKeyword(*inferNullability), SourceRange(pointerLoc),
4302 nullptr, SourceLocation(), nullptr, 0, syntax);
4303
4304 attrs.addAtEnd(nullabilityAttr);
4305
4306 if (inferNullabilityCS) {
4307 state.getDeclarator().getMutableDeclSpec().getObjCQualifiers()
4308 ->setObjCDeclQualifier(ObjCDeclSpec::DQ_CSNullability);
4309 }
4310
4311 if (pointerLoc.isValid() &&
4312 complainAboutInferringWithinChunk !=
4313 PointerWrappingDeclaratorKind::None) {
4314 auto Diag =
4315 S.Diag(pointerLoc, diag::warn_nullability_inferred_on_nested_type);
4316 Diag << static_cast<int>(complainAboutInferringWithinChunk);
4317 fixItNullability(S, Diag, pointerLoc, NullabilityKind::NonNull);
4318 }
4319
4320 if (inferNullabilityInnerOnly)
4321 inferNullabilityInnerOnlyComplete = true;
4322 return nullabilityAttr;
4323 }
4324
4325 // If we're supposed to complain about missing nullability, do so
4326 // now if it's truly missing.
4327 switch (complainAboutMissingNullability) {
4328 case CAMN_No:
4329 break;
4330
4331 case CAMN_InnerPointers:
4332 if (NumPointersRemaining == 0)
4333 break;
4334 LLVM_FALLTHROUGH[[gnu::fallthrough]];
4335
4336 case CAMN_Yes:
4337 checkNullabilityConsistency(S, pointerKind, pointerLoc, pointerEndLoc);
4338 }
4339 return nullptr;
4340 };
4341
4342 // If the type itself could have nullability but does not, infer pointer
4343 // nullability and perform consistency checking.
4344 if (S.CodeSynthesisContexts.empty()) {
4345 if (T->canHaveNullability(/*ResultIfUnknown*/false) &&
4346 !T->getNullability(S.Context)) {
4347 if (isVaList(T)) {
4348 // Record that we've seen a pointer, but do nothing else.
4349 if (NumPointersRemaining > 0)
4350 --NumPointersRemaining;
4351 } else {
4352 SimplePointerKind pointerKind = SimplePointerKind::Pointer;
4353 if (T->isBlockPointerType())
4354 pointerKind = SimplePointerKind::BlockPointer;
4355 else if (T->isMemberPointerType())
4356 pointerKind = SimplePointerKind::MemberPointer;
4357
4358 if (auto *attr = inferPointerNullability(
4359 pointerKind, D.getDeclSpec().getTypeSpecTypeLoc(),
4360 D.getDeclSpec().getEndLoc(),
4361 D.getMutableDeclSpec().getAttributes(),
4362 D.getMutableDeclSpec().getAttributePool())) {
4363 T = state.getAttributedType(
4364 createNullabilityAttr(Context, *attr, *inferNullability), T, T);
4365 }
4366 }
4367 }
4368
4369 if (complainAboutMissingNullability == CAMN_Yes &&
4370 T->isArrayType() && !T->getNullability(S.Context) && !isVaList(T) &&
4371 D.isPrototypeContext() &&
4372 !hasOuterPointerLikeChunk(D, D.getNumTypeObjects())) {
4373 checkNullabilityConsistency(S, SimplePointerKind::Array,
4374 D.getDeclSpec().getTypeSpecTypeLoc());
4375 }
4376 }
4377
4378 bool ExpectNoDerefChunk =
4379 state.getCurrentAttributes().hasAttribute(ParsedAttr::AT_NoDeref);
4380
4381 // Walk the DeclTypeInfo, building the recursive type as we go.
4382 // DeclTypeInfos are ordered from the identifier out, which is
4383 // opposite of what we want :).
4384 for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) {
4385 unsigned chunkIndex = e - i - 1;
4386 state.setCurrentChunkIndex(chunkIndex);
4387 DeclaratorChunk &DeclType = D.getTypeObject(chunkIndex);
4388 IsQualifiedFunction &= DeclType.Kind == DeclaratorChunk::Paren;
4389 switch (DeclType.Kind) {
4390 case DeclaratorChunk::Paren:
4391 if (i == 0)
4392 warnAboutRedundantParens(S, D, T);
4393 T = S.BuildParenType(T);
4394 break;
4395 case DeclaratorChunk::BlockPointer:
4396 // If blocks are disabled, emit an error.
4397 if (!LangOpts.Blocks)
4398 S.Diag(DeclType.Loc, diag::err_blocks_disable) << LangOpts.OpenCL;
4399
4400 // Handle pointer nullability.
4401 inferPointerNullability(SimplePointerKind::BlockPointer, DeclType.Loc,
4402 DeclType.EndLoc, DeclType.getAttrs(),
4403 state.getDeclarator().getAttributePool());
4404
4405 T = S.BuildBlockPointerType(T, D.getIdentifierLoc(), Name);
4406 if (DeclType.Cls.TypeQuals || LangOpts.OpenCL) {
4407 // OpenCL v2.0, s6.12.5 - Block variable declarations are implicitly
4408 // qualified with const.
4409 if (LangOpts.OpenCL)
4410 DeclType.Cls.TypeQuals |= DeclSpec::TQ_const;
4411 T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Cls.TypeQuals);
4412 }
4413 break;
4414 case DeclaratorChunk::Pointer:
4415 // Verify that we're not building a pointer to pointer to function with
4416 // exception specification.
4417 if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) {
4418 S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec);
4419 D.setInvalidType(true);
4420 // Build the type anyway.
4421 }
4422
4423 // Handle pointer nullability
4424 inferPointerNullability(SimplePointerKind::Pointer, DeclType.Loc,
4425 DeclType.EndLoc, DeclType.getAttrs(),
4426 state.getDeclarator().getAttributePool());
4427
4428 if (LangOpts.ObjC && T->getAs<ObjCObjectType>()) {
4429 T = Context.getObjCObjectPointerType(T);
4430 if (DeclType.Ptr.TypeQuals)
4431 T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Ptr.TypeQuals);
4432 break;
4433 }
4434
4435 // OpenCL v2.0 s6.9b - Pointer to image/sampler cannot be used.
4436 // OpenCL v2.0 s6.13.16.1 - Pointer to pipe cannot be used.
4437 // OpenCL v2.0 s6.12.5 - Pointers to Blocks are not allowed.
4438 if (LangOpts.OpenCL) {
4439 if (T->isImageType() || T->isSamplerT() || T->isPipeType() ||
4440 T->isBlockPointerType()) {
4441 S.Diag(D.getIdentifierLoc(), diag::err_opencl_pointer_to_type) << T;
4442 D.setInvalidType(true);
4443 }
4444 }
4445
4446 T = S.BuildPointerType(T, DeclType.Loc, Name);
4447 if (DeclType.Ptr.TypeQuals)
4448 T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Ptr.TypeQuals);
4449 break;
4450 case DeclaratorChunk::Reference: {
4451 // Verify that we're not building a reference to pointer to function with
4452 // exception specification.
4453 if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) {
4454 S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec);
4455 D.setInvalidType(true);
4456 // Build the type anyway.
4457 }
4458 T = S.BuildReferenceType(T, DeclType.Ref.LValueRef, DeclType.Loc, Name);
4459
4460 if (DeclType.Ref.HasRestrict)
4461 T = S.BuildQualifiedType(T, DeclType.Loc, Qualifiers::Restrict);
4462 break;
4463 }
4464 case DeclaratorChunk::Array: {
4465 // Verify that we're not building an array of pointers to function with
4466 // exception specification.
4467 if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) {
4468 S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec);
4469 D.setInvalidType(true);
4470 // Build the type anyway.
4471 }
4472 DeclaratorChunk::ArrayTypeInfo &ATI = DeclType.Arr;
4473 Expr *ArraySize = static_cast<Expr*>(ATI.NumElts);
4474 ArrayType::ArraySizeModifier ASM;
4475 if (ATI.isStar)
4476 ASM = ArrayType::Star;
4477 else if (ATI.hasStatic)
4478 ASM = ArrayType::Static;
4479 else
4480 ASM = ArrayType::Normal;
4481 if (ASM == ArrayType::Star && !D.isPrototypeContext()) {
4482 // FIXME: This check isn't quite right: it allows star in prototypes
4483 // for function definitions, and disallows some edge cases detailed
4484 // in http://gcc.gnu.org/ml/gcc-patches/2009-02/msg00133.html
4485 S.Diag(DeclType.Loc, diag::err_array_star_outside_prototype);
4486 ASM = ArrayType::Normal;
4487 D.setInvalidType(true);
4488 }
4489
4490 // C99 6.7.5.2p1: The optional type qualifiers and the keyword static
4491 // shall appear only in a declaration of a function parameter with an
4492 // array type, ...
4493 if (ASM == ArrayType::Static || ATI.TypeQuals) {
4494 if (!(D.isPrototypeContext() ||
4495 D.getContext() == DeclaratorContext::KNRTypeListContext)) {
4496 S.Diag(DeclType.Loc, diag::err_array_static_outside_prototype) <<
4497 (ASM == ArrayType::Static ? "'static'" : "type qualifier");
4498 // Remove the 'static' and the type qualifiers.
4499 if (ASM == ArrayType::Static)
4500 ASM = ArrayType::Normal;
4501 ATI.TypeQuals = 0;
4502 D.setInvalidType(true);
4503 }
4504
4505 // C99 6.7.5.2p1: ... and then only in the outermost array type
4506 // derivation.
4507 if (hasOuterPointerLikeChunk(D, chunkIndex)) {
4508 S.Diag(DeclType.Loc, diag::err_array_static_not_outermost) <<
4509 (ASM == ArrayType::Static ? "'static'" : "type qualifier");
4510 if (ASM == ArrayType::Static)
4511 ASM = ArrayType::Normal;
4512 ATI.TypeQuals = 0;
4513 D.setInvalidType(true);
4514 }
4515 }
4516 const AutoType *AT = T->getContainedAutoType();
4517 // Allow arrays of auto if we are a generic lambda parameter.
4518 // i.e. [](auto (&array)[5]) { return array[0]; }; OK
4519 if (AT &&
4520 D.getContext() != DeclaratorContext::LambdaExprParameterContext) {
4521 // We've already diagnosed this for decltype(auto).
4522 if (!AT->isDecltypeAuto())
4523 S.Diag(DeclType.Loc, diag::err_illegal_decl_array_of_auto)
4524 << getPrintableNameForEntity(Name) << T;
4525 T = QualType();
4526 break;
4527 }
4528
4529 // Array parameters can be marked nullable as well, although it's not
4530 // necessary if they're marked 'static'.
4531 if (complainAboutMissingNullability == CAMN_Yes &&
4532 !hasNullabilityAttr(DeclType.getAttrs()) &&
4533 ASM != ArrayType::Static &&
4534 D.isPrototypeContext() &&
4535 !hasOuterPointerLikeChunk(D, chunkIndex)) {
4536 checkNullabilityConsistency(S, SimplePointerKind::Array, DeclType.Loc);
4537 }
4538
4539 T = S.BuildArrayType(T, ASM, ArraySize, ATI.TypeQuals,
4540 SourceRange(DeclType.Loc, DeclType.EndLoc), Name);
4541 break;
4542 }
4543 case DeclaratorChunk::Function: {
4544 // If the function declarator has a prototype (i.e. it is not () and
4545 // does not have a K&R-style identifier list), then the arguments are part
4546 // of the type, otherwise the argument list is ().
4547 DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun;
4548 IsQualifiedFunction =
4549 FTI.hasMethodTypeQualifiers() || FTI.hasRefQualifier();
4550
4551 // Check for auto functions and trailing return type and adjust the
4552 // return type accordingly.
4553 if (!D.isInvalidType()) {
4554 // trailing-return-type is only required if we're declaring a function,
4555 // and not, for instance, a pointer to a function.
4556 if (D.getDeclSpec().hasAutoTypeSpec() &&
4557 !FTI.hasTrailingReturnType() && chunkIndex == 0) {
4558 if (!S.getLangOpts().CPlusPlus14) {
4559 S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(),
4560 D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto
4561 ? diag::err_auto_missing_trailing_return
4562 : diag::err_deduced_return_type);
4563 T = Context.IntTy;
4564 D.setInvalidType(true);
4565 } else {
4566 S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(),
4567 diag::warn_cxx11_compat_deduced_return_type);
4568 }
4569 } else if (FTI.hasTrailingReturnType()) {
4570 // T must be exactly 'auto' at this point. See CWG issue 681.
4571 if (isa<ParenType>(T)) {
4572 S.Diag(D.getBeginLoc(), diag::err_trailing_return_in_parens)
4573 << T << D.getSourceRange();
4574 D.setInvalidType(true);
4575 } else if (D.getName().getKind() ==
4576 UnqualifiedIdKind::IK_DeductionGuideName) {
4577 if (T != Context.DependentTy) {
4578 S.Diag(D.getDeclSpec().getBeginLoc(),
4579 diag::err_deduction_guide_with_complex_decl)
4580 << D.getSourceRange();
4581 D.setInvalidType(true);
4582 }
4583 } else if (D.getContext() != DeclaratorContext::LambdaExprContext &&
4584 (T.hasQualifiers() || !isa<AutoType>(T) ||
4585 cast<AutoType>(T)->getKeyword() !=
4586 AutoTypeKeyword::Auto)) {
4587 S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(),
4588 diag::err_trailing_return_without_auto)
4589 << T << D.getDeclSpec().getSourceRange();
4590 D.setInvalidType(true);
4591 }
4592 T = S.GetTypeFromParser(FTI.getTrailingReturnType(), &TInfo);
4593 if (T.isNull()) {
4594 // An error occurred parsing the trailing return type.
4595 T = Context.IntTy;
4596 D.setInvalidType(true);
4597 }
4598 } else {
4599 // This function type is not the type of the entity being declared,
4600 // so checking the 'auto' is not the responsibility of this chunk.
4601 }
4602 }
4603
4604 // C99 6.7.5.3p1: The return type may not be a function or array type.
4605 // For conversion functions, we'll diagnose this particular error later.
4606 if (!D.isInvalidType() && (T->isArrayType() || T->isFunctionType()) &&
4607 (D.getName().getKind() !=
4608 UnqualifiedIdKind::IK_ConversionFunctionId)) {
4609 unsigned diagID = diag::err_func_returning_array_function;
4610 // Last processing chunk in block context means this function chunk
4611 // represents the block.
4612 if (chunkIndex == 0 &&
4613 D.getContext() == DeclaratorContext::BlockLiteralContext)
4614 diagID = diag::err_block_returning_array_function;
4615 S.Diag(DeclType.Loc, diagID) << T->isFunctionType() << T;
4616 T = Context.IntTy;
4617 D.setInvalidType(true);
4618 }
4619
4620 // Do not allow returning half FP value.
4621 // FIXME: This really should be in BuildFunctionType.
4622 if (T->isHalfType()) {
4623 if (S.getLangOpts().OpenCL) {
4624 if (!S.getOpenCLOptions().isEnabled("cl_khr_fp16")) {
4625 S.Diag(D.getIdentifierLoc(), diag::err_opencl_invalid_return)
4626 << T << 0 /*pointer hint*/;
4627 D.setInvalidType(true);
4628 }
4629 } else if (!S.getLangOpts().HalfArgsAndReturns) {
4630 S.Diag(D.getIdentifierLoc(),
4631 diag::err_parameters_retval_cannot_have_fp16_type) << 1;
4632 D.setInvalidType(true);
4633 }
4634 }
4635
4636 if (LangOpts.OpenCL) {
4637 // OpenCL v2.0 s6.12.5 - A block cannot be the return value of a
4638 // function.
4639 if (T->isBlockPointerType() || T->isImageType() || T->isSamplerT() ||
4640 T->isPipeType()) {
4641 S.Diag(D.getIdentifierLoc(), diag::err_opencl_invalid_return)
4642 << T << 1 /*hint off*/;
4643 D.setInvalidType(true);
4644 }
4645 // OpenCL doesn't support variadic functions and blocks
4646 // (s6.9.e and s6.12.5 OpenCL v2.0) except for printf.
4647 // We also allow here any toolchain reserved identifiers.
4648 if (FTI.isVariadic &&
4649 !(D.getIdentifier() &&
4650 ((D.getIdentifier()->getName() == "printf" &&
4651 (LangOpts.OpenCLCPlusPlus || LangOpts.OpenCLVersion >= 120)) ||
4652 D.getIdentifier()->getName().startswith("__")))) {
4653 S.Diag(D.getIdentifierLoc(), diag::err_opencl_variadic_function);
4654 D.setInvalidType(true);
4655 }
4656 }
4657
4658 // Methods cannot return interface types. All ObjC objects are
4659 // passed by reference.
4660 if (T->isObjCObjectType()) {
4661 SourceLocation DiagLoc, FixitLoc;
4662 if (TInfo) {
4663 DiagLoc = TInfo->getTypeLoc().getBeginLoc();
4664 FixitLoc = S.getLocForEndOfToken(TInfo->getTypeLoc().getEndLoc());
4665 } else {
4666 DiagLoc = D.getDeclSpec().getTypeSpecTypeLoc();
4667 FixitLoc = S.getLocForEndOfToken(D.getDeclSpec().getEndLoc());
4668 }
4669 S.Diag(DiagLoc, diag::err_object_cannot_be_passed_returned_by_value)
4670 << 0 << T
4671 << FixItHint::CreateInsertion(FixitLoc, "*");
4672
4673 T = Context.getObjCObjectPointerType(T);
4674 if (TInfo) {
4675 TypeLocBuilder TLB;
4676 TLB.pushFullCopy(TInfo->getTypeLoc());
4677 ObjCObjectPointerTypeLoc TLoc = TLB.push<ObjCObjectPointerTypeLoc>(T);
4678 TLoc.setStarLoc(FixitLoc);
4679 TInfo = TLB.getTypeSourceInfo(Context, T);
4680 }
4681
4682 D.setInvalidType(true);
4683 }
4684
4685 // cv-qualifiers on return types are pointless except when the type is a
4686 // class type in C++.
4687 if ((T.getCVRQualifiers() || T->isAtomicType()) &&
4688 !(S.getLangOpts().CPlusPlus &&
4689 (T->isDependentType() || T->isRecordType()))) {
4690 if (T->isVoidType() && !S.getLangOpts().CPlusPlus &&
4691 D.getFunctionDefinitionKind() == FDK_Definition) {
4692 // [6.9.1/3] qualified void return is invalid on a C
4693 // function definition. Apparently ok on declarations and
4694 // in C++ though (!)
4695 S.Diag(DeclType.Loc, diag::err_func_returning_qualified_void) << T;
4696 } else
4697 diagnoseRedundantReturnTypeQualifiers(S, T, D, chunkIndex);
4698
4699 // C++2a [dcl.fct]p12:
4700 // A volatile-qualified return type is deprecated
4701 if (T.isVolatileQualified() && S.getLangOpts().CPlusPlus2a)
4702 S.Diag(DeclType.Loc, diag::warn_deprecated_volatile_return) << T;
4703 }
4704
4705 // Objective-C ARC ownership qualifiers are ignored on the function
4706 // return type (by type canonicalization). Complain if this attribute
4707 // was written here.
4708 if (T.getQualifiers().hasObjCLifetime()) {
4709 SourceLocation AttrLoc;
4710 if (chunkIndex + 1 < D.getNumTypeObjects()) {
4711 DeclaratorChunk ReturnTypeChunk = D.getTypeObject(chunkIndex + 1);
4712 for (const ParsedAttr &AL : ReturnTypeChunk.getAttrs()) {
4713 if (AL.getKind() == ParsedAttr::AT_ObjCOwnership) {
4714 AttrLoc = AL.getLoc();
4715 break;
4716 }
4717 }
4718 }
4719 if (AttrLoc.isInvalid()) {
4720 for (const ParsedAttr &AL : D.getDeclSpec().getAttributes()) {
4721 if (AL.getKind() == ParsedAttr::AT_ObjCOwnership) {
4722 AttrLoc = AL.getLoc();
4723 break;
4724 }
4725 }
4726 }
4727
4728 if (AttrLoc.isValid()) {
4729 // The ownership attributes are almost always written via
4730 // the predefined
4731 // __strong/__weak/__autoreleasing/__unsafe_unretained.
4732 if (AttrLoc.isMacroID())
4733 AttrLoc =
4734 S.SourceMgr.getImmediateExpansionRange(AttrLoc).getBegin();
4735
4736 S.Diag(AttrLoc, diag::warn_arc_lifetime_result_type)
4737 << T.getQualifiers().getObjCLifetime();
4738 }
4739 }
4740
4741 if (LangOpts.CPlusPlus && D.getDeclSpec().hasTagDefinition()) {
4742 // C++ [dcl.fct]p6:
4743 // Types shall not be defined in return or parameter types.
4744 TagDecl *Tag = cast<TagDecl>(D.getDeclSpec().getRepAsDecl());
4745 S.Diag(Tag->getLocation(), diag::err_type_defined_in_result_type)
4746 << Context.getTypeDeclType(Tag);
4747 }
4748
4749 // Exception specs are not allowed in typedefs. Complain, but add it
4750 // anyway.
4751 if (IsTypedefName && FTI.getExceptionSpecType() && !LangOpts.CPlusPlus17)
4752 S.Diag(FTI.getExceptionSpecLocBeg(),
4753 diag::err_exception_spec_in_typedef)
4754 << (D.getContext() == DeclaratorContext::AliasDeclContext ||
4755 D.getContext() == DeclaratorContext::AliasTemplateContext);
4756
4757 // If we see "T var();" or "T var(T());" at block scope, it is probably
4758 // an attempt to initialize a variable, not a function declaration.
4759 if (FTI.isAmbiguous)
4760 warnAboutAmbiguousFunction(S, D, DeclType, T);
4761
4762 FunctionType::ExtInfo EI(
4763 getCCForDeclaratorChunk(S, D, DeclType.getAttrs(), FTI, chunkIndex));
4764
4765 if (!FTI.NumParams && !FTI.isVariadic && !LangOpts.CPlusPlus
4766 && !LangOpts.OpenCL) {
4767 // Simple void foo(), where the incoming T is the result type.
4768 T = Context.getFunctionNoProtoType(T, EI);
4769 } else {
4770 // We allow a zero-parameter variadic function in C if the
4771 // function is marked with the "overloadable" attribute. Scan
4772 // for this attribute now.
4773 if (!FTI.NumParams && FTI.isVariadic && !LangOpts.CPlusPlus)
4774 if (!D.getAttributes().hasAttribute(ParsedAttr::AT_Overloadable))
4775 S.Diag(FTI.getEllipsisLoc(), diag::err_ellipsis_first_param);
4776
4777 if (FTI.NumParams && FTI.Params[0].Param == nullptr) {
4778 // C99 6.7.5.3p3: Reject int(x,y,z) when it's not a function
4779 // definition.
4780 S.Diag(FTI.Params[0].IdentLoc,
4781 diag::err_ident_list_in_fn_declaration);
4782 D.setInvalidType(true);
4783 // Recover by creating a K&R-style function type.
4784 T = Context.getFunctionNoProtoType(T, EI);
4785 break;
4786 }
4787
4788 FunctionProtoType::ExtProtoInfo EPI;
4789 EPI.ExtInfo = EI;
4790 EPI.Variadic = FTI.isVariadic;
4791 EPI.HasTrailingReturn = FTI.hasTrailingReturnType();
4792 EPI.TypeQuals.addCVRUQualifiers(
4793 FTI.MethodQualifiers ? FTI.MethodQualifiers->getTypeQualifiers()
4794 : 0);
4795 EPI.RefQualifier = !FTI.hasRefQualifier()? RQ_None
4796 : FTI.RefQualifierIsLValueRef? RQ_LValue
4797 : RQ_RValue;
4798
4799 // Otherwise, we have a function with a parameter list that is
4800 // potentially variadic.
4801 SmallVector<QualType, 16> ParamTys;
4802 ParamTys.reserve(FTI.NumParams);
4803
4804 SmallVector<FunctionProtoType::ExtParameterInfo, 16>
4805 ExtParameterInfos(FTI.NumParams);
4806 bool HasAnyInterestingExtParameterInfos = false;
4807
4808 for (unsigned i = 0, e = FTI.NumParams; i != e; ++i) {
4809 ParmVarDecl *Param = cast<ParmVarDecl>(FTI.Params[i].Param);
4810 QualType ParamTy = Param->getType();
4811 assert(!ParamTy.isNull() && "Couldn't parse type?")((!ParamTy.isNull() && "Couldn't parse type?") ? static_cast
<void> (0) : __assert_fail ("!ParamTy.isNull() && \"Couldn't parse type?\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 4811, __PRETTY_FUNCTION__))
;
4812
4813 // Look for 'void'. void is allowed only as a single parameter to a
4814 // function with no other parameters (C99 6.7.5.3p10). We record
4815 // int(void) as a FunctionProtoType with an empty parameter list.
4816 if (ParamTy->isVoidType()) {
4817 // If this is something like 'float(int, void)', reject it. 'void'
4818 // is an incomplete type (C99 6.2.5p19) and function decls cannot
4819 // have parameters of incomplete type.
4820 if (FTI.NumParams != 1 || FTI.isVariadic) {
4821 S.Diag(DeclType.Loc, diag::err_void_only_param);
4822 ParamTy = Context.IntTy;
4823 Param->setType(ParamTy);
4824 } else if (FTI.Params[i].Ident) {
4825 // Reject, but continue to parse 'int(void abc)'.
4826 S.Diag(FTI.Params[i].IdentLoc, diag::err_param_with_void_type);
4827 ParamTy = Context.IntTy;
4828 Param->setType(ParamTy);
4829 } else {
4830 // Reject, but continue to parse 'float(const void)'.
4831 if (ParamTy.hasQualifiers())
4832 S.Diag(DeclType.Loc, diag::err_void_param_qualified);
4833
4834 // Do not add 'void' to the list.
4835 break;
4836 }
4837 } else if (ParamTy->isHalfType()) {
4838 // Disallow half FP parameters.
4839 // FIXME: This really should be in BuildFunctionType.
4840 if (S.getLangOpts().OpenCL) {
4841 if (!S.getOpenCLOptions().isEnabled("cl_khr_fp16")) {
4842 S.Diag(Param->getLocation(),
4843 diag::err_opencl_half_param) << ParamTy;
4844 D.setInvalidType();
4845 Param->setInvalidDecl();
4846 }
4847 } else if (!S.getLangOpts().HalfArgsAndReturns) {
4848 S.Diag(Param->getLocation(),
4849 diag::err_parameters_retval_cannot_have_fp16_type) << 0;
4850 D.setInvalidType();
4851 }
4852 } else if (!FTI.hasPrototype) {
4853 if (ParamTy->isPromotableIntegerType()) {
4854 ParamTy = Context.getPromotedIntegerType(ParamTy);
4855 Param->setKNRPromoted(true);
4856 } else if (const BuiltinType* BTy = ParamTy->getAs<BuiltinType>()) {
4857 if (BTy->getKind() == BuiltinType::Float) {
4858 ParamTy = Context.DoubleTy;
4859 Param->setKNRPromoted(true);
4860 }
4861 }
4862 }
4863
4864 if (LangOpts.ObjCAutoRefCount && Param->hasAttr<NSConsumedAttr>()) {
4865 ExtParameterInfos[i] = ExtParameterInfos[i].withIsConsumed(true);
4866 HasAnyInterestingExtParameterInfos = true;
4867 }
4868
4869 if (auto attr = Param->getAttr<ParameterABIAttr>()) {
4870 ExtParameterInfos[i] =
4871 ExtParameterInfos[i].withABI(attr->getABI());
4872 HasAnyInterestingExtParameterInfos = true;
4873 }
4874
4875 if (Param->hasAttr<PassObjectSizeAttr>()) {
4876 ExtParameterInfos[i] = ExtParameterInfos[i].withHasPassObjectSize();
4877 HasAnyInterestingExtParameterInfos = true;
4878 }
4879
4880 if (Param->hasAttr<NoEscapeAttr>()) {
4881 ExtParameterInfos[i] = ExtParameterInfos[i].withIsNoEscape(true);
4882 HasAnyInterestingExtParameterInfos = true;
4883 }
4884
4885 ParamTys.push_back(ParamTy);
4886 }
4887
4888 if (HasAnyInterestingExtParameterInfos) {
4889 EPI.ExtParameterInfos = ExtParameterInfos.data();
4890 checkExtParameterInfos(S, ParamTys, EPI,
4891 [&](unsigned i) { return FTI.Params[i].Param->getLocation(); });
4892 }
4893
4894 SmallVector<QualType, 4> Exceptions;
4895 SmallVector<ParsedType, 2> DynamicExceptions;
4896 SmallVector<SourceRange, 2> DynamicExceptionRanges;
4897 Expr *NoexceptExpr = nullptr;
4898
4899 if (FTI.getExceptionSpecType() == EST_Dynamic) {
4900 // FIXME: It's rather inefficient to have to split into two vectors
4901 // here.
4902 unsigned N = FTI.getNumExceptions();
4903 DynamicExceptions.reserve(N);
4904 DynamicExceptionRanges.reserve(N);
4905 for (unsigned I = 0; I != N; ++I) {
4906 DynamicExceptions.push_back(FTI.Exceptions[I].Ty);
4907 DynamicExceptionRanges.push_back(FTI.Exceptions[I].Range);
4908 }
4909 } else if (isComputedNoexcept(FTI.getExceptionSpecType())) {
4910 NoexceptExpr = FTI.NoexceptExpr;
4911 }
4912
4913 S.checkExceptionSpecification(D.isFunctionDeclarationContext(),
4914 FTI.getExceptionSpecType(),
4915 DynamicExceptions,
4916 DynamicExceptionRanges,
4917 NoexceptExpr,
4918 Exceptions,
4919 EPI.ExceptionSpec);
4920
4921 // FIXME: Set address space from attrs for C++ mode here.
4922 // OpenCLCPlusPlus: A class member function has an address space.
4923 auto IsClassMember = [&]() {
4924 return (!state.getDeclarator().getCXXScopeSpec().isEmpty() &&
4925 state.getDeclarator()
4926 .getCXXScopeSpec()
4927 .getScopeRep()
4928 ->getKind() == NestedNameSpecifier::TypeSpec) ||
4929 state.getDeclarator().getContext() ==
4930 DeclaratorContext::MemberContext;
4931 };
4932
4933 if (state.getSema().getLangOpts().OpenCLCPlusPlus && IsClassMember()) {
4934 LangAS ASIdx = LangAS::Default;
4935 // Take address space attr if any and mark as invalid to avoid adding
4936 // them later while creating QualType.
4937 if (FTI.MethodQualifiers)
4938 for (ParsedAttr &attr : FTI.MethodQualifiers->getAttributes()) {
4939 LangAS ASIdxNew = attr.asOpenCLLangAS();
4940 if (DiagnoseMultipleAddrSpaceAttributes(S, ASIdx, ASIdxNew,
4941 attr.getLoc()))
4942 D.setInvalidType(true);
4943 else
4944 ASIdx = ASIdxNew;
4945 }
4946 // If a class member function's address space is not set, set it to
4947 // __generic.
4948 LangAS AS =
4949 (ASIdx == LangAS::Default ? LangAS::opencl_generic : ASIdx);
4950 EPI.TypeQuals.addAddressSpace(AS);
4951 }
4952 T = Context.getFunctionType(T, ParamTys, EPI);
4953 }
4954 break;
4955 }
4956 case DeclaratorChunk::MemberPointer: {
4957 // The scope spec must refer to a class, or be dependent.
4958 CXXScopeSpec &SS = DeclType.Mem.Scope();
4959 QualType ClsType;
4960
4961 // Handle pointer nullability.
4962 inferPointerNullability(SimplePointerKind::MemberPointer, DeclType.Loc,
4963 DeclType.EndLoc, DeclType.getAttrs(),
4964 state.getDeclarator().getAttributePool());
4965
4966 if (SS.isInvalid()) {
4967 // Avoid emitting extra errors if we already errored on the scope.
4968 D.setInvalidType(true);
4969 } else if (S.isDependentScopeSpecifier(SS) ||
4970 dyn_cast_or_null<CXXRecordDecl>(S.computeDeclContext(SS))) {
4971 NestedNameSpecifier *NNS = SS.getScopeRep();
4972 NestedNameSpecifier *NNSPrefix = NNS->getPrefix();
4973 switch (NNS->getKind()) {
4974 case NestedNameSpecifier::Identifier:
4975 ClsType = Context.getDependentNameType(ETK_None, NNSPrefix,
4976 NNS->getAsIdentifier());
4977 break;
4978
4979 case NestedNameSpecifier::Namespace:
4980 case NestedNameSpecifier::NamespaceAlias:
4981 case NestedNameSpecifier::Global:
4982 case NestedNameSpecifier::Super:
4983 llvm_unreachable("Nested-name-specifier must name a type")::llvm::llvm_unreachable_internal("Nested-name-specifier must name a type"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 4983)
;
4984
4985 case NestedNameSpecifier::TypeSpec:
4986 case NestedNameSpecifier::TypeSpecWithTemplate:
4987 ClsType = QualType(NNS->getAsType(), 0);
4988 // Note: if the NNS has a prefix and ClsType is a nondependent
4989 // TemplateSpecializationType, then the NNS prefix is NOT included
4990 // in ClsType; hence we wrap ClsType into an ElaboratedType.
4991 // NOTE: in particular, no wrap occurs if ClsType already is an
4992 // Elaborated, DependentName, or DependentTemplateSpecialization.
4993 if (NNSPrefix && isa<TemplateSpecializationType>(NNS->getAsType()))
4994 ClsType = Context.getElaboratedType(ETK_None, NNSPrefix, ClsType);
4995 break;
4996 }
4997 } else {
4998 S.Diag(DeclType.Mem.Scope().getBeginLoc(),
4999 diag::err_illegal_decl_mempointer_in_nonclass)
5000 << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name")
5001 << DeclType.Mem.Scope().getRange();
5002 D.setInvalidType(true);
5003 }
5004
5005 if (!ClsType.isNull())
5006 T = S.BuildMemberPointerType(T, ClsType, DeclType.Loc,
5007 D.getIdentifier());
5008 if (T.isNull()) {
5009 T = Context.IntTy;
5010 D.setInvalidType(true);
5011 } else if (DeclType.Mem.TypeQuals) {
5012 T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Mem.TypeQuals);
5013 }
5014 break;
5015 }
5016
5017 case DeclaratorChunk::Pipe: {
5018 T = S.BuildReadPipeType(T, DeclType.Loc);
5019 processTypeAttrs(state, T, TAL_DeclSpec,
5020 D.getMutableDeclSpec().getAttributes());
5021 break;
5022 }
5023 }
5024
5025 if (T.isNull()) {
5026 D.setInvalidType(true);
5027 T = Context.IntTy;
5028 }
5029
5030 // See if there are any attributes on this declarator chunk.
5031 processTypeAttrs(state, T, TAL_DeclChunk, DeclType.getAttrs());
5032
5033 if (DeclType.Kind != DeclaratorChunk::Paren) {
5034 if (ExpectNoDerefChunk && !IsNoDerefableChunk(DeclType))
5035 S.Diag(DeclType.Loc, diag::warn_noderef_on_non_pointer_or_array);
5036
5037 ExpectNoDerefChunk = state.didParseNoDeref();
5038 }
5039 }
5040
5041 if (ExpectNoDerefChunk)
5042 S.Diag(state.getDeclarator().getBeginLoc(),
5043 diag::warn_noderef_on_non_pointer_or_array);
5044
5045 // GNU warning -Wstrict-prototypes
5046 // Warn if a function declaration is without a prototype.
5047 // This warning is issued for all kinds of unprototyped function
5048 // declarations (i.e. function type typedef, function pointer etc.)
5049 // C99 6.7.5.3p14:
5050 // The empty list in a function declarator that is not part of a definition
5051 // of that function specifies that no information about the number or types
5052 // of the parameters is supplied.
5053 if (!LangOpts.CPlusPlus && D.getFunctionDefinitionKind() == FDK_Declaration) {
5054 bool IsBlock = false;
5055 for (const DeclaratorChunk &DeclType : D.type_objects()) {
5056 switch (DeclType.Kind) {
5057 case DeclaratorChunk::BlockPointer:
5058 IsBlock = true;
5059 break;
5060 case DeclaratorChunk::Function: {
5061 const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun;
5062 // We supress the warning when there's no LParen location, as this
5063 // indicates the declaration was an implicit declaration, which gets
5064 // warned about separately via -Wimplicit-function-declaration.
5065 if (FTI.NumParams == 0 && !FTI.isVariadic && FTI.getLParenLoc().isValid())
5066 S.Diag(DeclType.Loc, diag::warn_strict_prototypes)
5067 << IsBlock
5068 << FixItHint::CreateInsertion(FTI.getRParenLoc(), "void");
5069 IsBlock = false;
5070 break;
5071 }
5072 default:
5073 break;
5074 }
5075 }
5076 }
5077
5078 assert(!T.isNull() && "T must not be null after this point")((!T.isNull() && "T must not be null after this point"
) ? static_cast<void> (0) : __assert_fail ("!T.isNull() && \"T must not be null after this point\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5078, __PRETTY_FUNCTION__))
;
5079
5080 if (LangOpts.CPlusPlus && T->isFunctionType()) {
5081 const FunctionProtoType *FnTy = T->getAs<FunctionProtoType>();
5082 assert(FnTy && "Why oh why is there not a FunctionProtoType here?")((FnTy && "Why oh why is there not a FunctionProtoType here?"
) ? static_cast<void> (0) : __assert_fail ("FnTy && \"Why oh why is there not a FunctionProtoType here?\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5082, __PRETTY_FUNCTION__))
;
5083
5084 // C++ 8.3.5p4:
5085 // A cv-qualifier-seq shall only be part of the function type
5086 // for a nonstatic member function, the function type to which a pointer
5087 // to member refers, or the top-level function type of a function typedef
5088 // declaration.
5089 //
5090 // Core issue 547 also allows cv-qualifiers on function types that are
5091 // top-level template type arguments.
5092 enum { NonMember, Member, DeductionGuide } Kind = NonMember;
5093 if (D.getName().getKind() == UnqualifiedIdKind::IK_DeductionGuideName)
5094 Kind = DeductionGuide;
5095 else if (!D.getCXXScopeSpec().isSet()) {
5096 if ((D.getContext() == DeclaratorContext::MemberContext ||
5097 D.getContext() == DeclaratorContext::LambdaExprContext) &&
5098 !D.getDeclSpec().isFriendSpecified())
5099 Kind = Member;
5100 } else {
5101 DeclContext *DC = S.computeDeclContext(D.getCXXScopeSpec());
5102 if (!DC || DC->isRecord())
5103 Kind = Member;
5104 }
5105
5106 // C++11 [dcl.fct]p6 (w/DR1417):
5107 // An attempt to specify a function type with a cv-qualifier-seq or a
5108 // ref-qualifier (including by typedef-name) is ill-formed unless it is:
5109 // - the function type for a non-static member function,
5110 // - the function type to which a pointer to member refers,
5111 // - the top-level function type of a function typedef declaration or
5112 // alias-declaration,
5113 // - the type-id in the default argument of a type-parameter, or
5114 // - the type-id of a template-argument for a type-parameter
5115 //
5116 // FIXME: Checking this here is insufficient. We accept-invalid on:
5117 //
5118 // template<typename T> struct S { void f(T); };
5119 // S<int() const> s;
5120 //
5121 // ... for instance.
5122 if (IsQualifiedFunction &&
5123 !(Kind == Member &&
5124 D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) &&
5125 !IsTypedefName &&
5126 D.getContext() != DeclaratorContext::TemplateArgContext &&
5127 D.getContext() != DeclaratorContext::TemplateTypeArgContext) {
5128 SourceLocation Loc = D.getBeginLoc();
5129 SourceRange RemovalRange;
5130 unsigned I;
5131 if (D.isFunctionDeclarator(I)) {
5132 SmallVector<SourceLocation, 4> RemovalLocs;
5133 const DeclaratorChunk &Chunk = D.getTypeObject(I);
5134 assert(Chunk.Kind == DeclaratorChunk::Function)((Chunk.Kind == DeclaratorChunk::Function) ? static_cast<void
> (0) : __assert_fail ("Chunk.Kind == DeclaratorChunk::Function"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5134, __PRETTY_FUNCTION__))
;
5135
5136 if (Chunk.Fun.hasRefQualifier())
5137 RemovalLocs.push_back(Chunk.Fun.getRefQualifierLoc());
5138
5139 if (Chunk.Fun.hasMethodTypeQualifiers())
5140 Chunk.Fun.MethodQualifiers->forEachQualifier(
5141 [&](DeclSpec::TQ TypeQual, StringRef QualName,
5142 SourceLocation SL) { RemovalLocs.push_back(SL); });
5143
5144 if (!RemovalLocs.empty()) {
5145 llvm::sort(RemovalLocs,
5146 BeforeThanCompare<SourceLocation>(S.getSourceManager()));
5147 RemovalRange = SourceRange(RemovalLocs.front(), RemovalLocs.back());
5148 Loc = RemovalLocs.front();
5149 }
5150 }
5151
5152 S.Diag(Loc, diag::err_invalid_qualified_function_type)
5153 << Kind << D.isFunctionDeclarator() << T
5154 << getFunctionQualifiersAsString(FnTy)
5155 << FixItHint::CreateRemoval(RemovalRange);
5156
5157 // Strip the cv-qualifiers and ref-qualifiers from the type.
5158 FunctionProtoType::ExtProtoInfo EPI = FnTy->getExtProtoInfo();
5159 EPI.TypeQuals.removeCVRQualifiers();
5160 EPI.RefQualifier = RQ_None;
5161
5162 T = Context.getFunctionType(FnTy->getReturnType(), FnTy->getParamTypes(),
5163 EPI);
5164 // Rebuild any parens around the identifier in the function type.
5165 for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) {
5166 if (D.getTypeObject(i).Kind != DeclaratorChunk::Paren)
5167 break;
5168 T = S.BuildParenType(T);
5169 }
5170 }
5171 }
5172
5173 // Apply any undistributed attributes from the declarator.
5174 processTypeAttrs(state, T, TAL_DeclName, D.getAttributes());
5175
5176 // Diagnose any ignored type attributes.
5177 state.diagnoseIgnoredTypeAttrs(T);
5178
5179 // C++0x [dcl.constexpr]p9:
5180 // A constexpr specifier used in an object declaration declares the object
5181 // as const.
5182 if (D.getDeclSpec().getConstexprSpecifier() == CSK_constexpr &&
5183 T->isObjectType())
5184 T.addConst();
5185
5186 // C++2a [dcl.fct]p4:
5187 // A parameter with volatile-qualified type is deprecated
5188 if (T.isVolatileQualified() && S.getLangOpts().CPlusPlus2a &&
5189 (D.getContext() == DeclaratorContext::PrototypeContext ||
5190 D.getContext() == DeclaratorContext::LambdaExprParameterContext))
5191 S.Diag(D.getIdentifierLoc(), diag::warn_deprecated_volatile_param) << T;
5192
5193 // If there was an ellipsis in the declarator, the declaration declares a
5194 // parameter pack whose type may be a pack expansion type.
5195 if (D.hasEllipsis()) {
5196 // C++0x [dcl.fct]p13:
5197 // A declarator-id or abstract-declarator containing an ellipsis shall
5198 // only be used in a parameter-declaration. Such a parameter-declaration
5199 // is a parameter pack (14.5.3). [...]
5200 switch (D.getContext()) {
5201 case DeclaratorContext::PrototypeContext:
5202 case DeclaratorContext::LambdaExprParameterContext:
5203 // C++0x [dcl.fct]p13:
5204 // [...] When it is part of a parameter-declaration-clause, the
5205 // parameter pack is a function parameter pack (14.5.3). The type T
5206 // of the declarator-id of the function parameter pack shall contain
5207 // a template parameter pack; each template parameter pack in T is
5208 // expanded by the function parameter pack.
5209 //
5210 // We represent function parameter packs as function parameters whose
5211 // type is a pack expansion.
5212 if (!T->containsUnexpandedParameterPack()) {
5213 S.Diag(D.getEllipsisLoc(),
5214 diag::err_function_parameter_pack_without_parameter_packs)
5215 << T << D.getSourceRange();
5216 D.setEllipsisLoc(SourceLocation());
5217 } else {
5218 T = Context.getPackExpansionType(T, None);
5219 }
5220 break;
5221 case DeclaratorContext::TemplateParamContext:
5222 // C++0x [temp.param]p15:
5223 // If a template-parameter is a [...] is a parameter-declaration that
5224 // declares a parameter pack (8.3.5), then the template-parameter is a
5225 // template parameter pack (14.5.3).
5226 //
5227 // Note: core issue 778 clarifies that, if there are any unexpanded
5228 // parameter packs in the type of the non-type template parameter, then
5229 // it expands those parameter packs.
5230 if (T->containsUnexpandedParameterPack())
5231 T = Context.getPackExpansionType(T, None);
5232 else
5233 S.Diag(D.getEllipsisLoc(),
5234 LangOpts.CPlusPlus11
5235 ? diag::warn_cxx98_compat_variadic_templates
5236 : diag::ext_variadic_templates);
5237 break;
5238
5239 case DeclaratorContext::FileContext:
5240 case DeclaratorContext::KNRTypeListContext:
5241 case DeclaratorContext::ObjCParameterContext: // FIXME: special diagnostic
5242 // here?
5243 case DeclaratorContext::ObjCResultContext: // FIXME: special diagnostic
5244 // here?
5245 case DeclaratorContext::TypeNameContext:
5246 case DeclaratorContext::FunctionalCastContext:
5247 case DeclaratorContext::CXXNewContext:
5248 case DeclaratorContext::AliasDeclContext:
5249 case DeclaratorContext::AliasTemplateContext:
5250 case DeclaratorContext::MemberContext:
5251 case DeclaratorContext::BlockContext:
5252 case DeclaratorContext::ForContext:
5253 case DeclaratorContext::InitStmtContext:
5254 case DeclaratorContext::ConditionContext:
5255 case DeclaratorContext::CXXCatchContext:
5256 case DeclaratorContext::ObjCCatchContext:
5257 case DeclaratorContext::BlockLiteralContext:
5258 case DeclaratorContext::LambdaExprContext:
5259 case DeclaratorContext::ConversionIdContext:
5260 case DeclaratorContext::TrailingReturnContext:
5261 case DeclaratorContext::TrailingReturnVarContext:
5262 case DeclaratorContext::TemplateArgContext:
5263 case DeclaratorContext::TemplateTypeArgContext:
5264 // FIXME: We may want to allow parameter packs in block-literal contexts
5265 // in the future.
5266 S.Diag(D.getEllipsisLoc(),
5267 diag::err_ellipsis_in_declarator_not_parameter);
5268 D.setEllipsisLoc(SourceLocation());
5269 break;
5270 }
5271 }
5272
5273 assert(!T.isNull() && "T must not be null at the end of this function")((!T.isNull() && "T must not be null at the end of this function"
) ? static_cast<void> (0) : __assert_fail ("!T.isNull() && \"T must not be null at the end of this function\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5273, __PRETTY_FUNCTION__))
;
5274 if (D.isInvalidType())
5275 return Context.getTrivialTypeSourceInfo(T);
5276
5277 return GetTypeSourceInfoForDeclarator(state, T, TInfo);
5278}
5279
5280/// GetTypeForDeclarator - Convert the type for the specified
5281/// declarator to Type instances.
5282///
5283/// The result of this call will never be null, but the associated
5284/// type may be a null type if there's an unrecoverable error.
5285TypeSourceInfo *Sema::GetTypeForDeclarator(Declarator &D, Scope *S) {
5286 // Determine the type of the declarator. Not all forms of declarator
5287 // have a type.
5288
5289 TypeProcessingState state(*this, D);
5290
5291 TypeSourceInfo *ReturnTypeInfo = nullptr;
5292 QualType T = GetDeclSpecTypeForDeclarator(state, ReturnTypeInfo);
5293 if (D.isPrototypeContext() && getLangOpts().ObjCAutoRefCount)
5294 inferARCWriteback(state, T);
5295
5296 return GetFullTypeForDeclarator(state, T, ReturnTypeInfo);
5297}
5298
5299static void transferARCOwnershipToDeclSpec(Sema &S,
5300 QualType &declSpecTy,
5301 Qualifiers::ObjCLifetime ownership) {
5302 if (declSpecTy->isObjCRetainableType() &&
5303 declSpecTy.getObjCLifetime() == Qualifiers::OCL_None) {
5304 Qualifiers qs;
5305 qs.addObjCLifetime(ownership);
5306 declSpecTy = S.Context.getQualifiedType(declSpecTy, qs);
5307 }
5308}
5309
5310static void transferARCOwnershipToDeclaratorChunk(TypeProcessingState &state,
5311 Qualifiers::ObjCLifetime ownership,
5312 unsigned chunkIndex) {
5313 Sema &S = state.getSema();
5314 Declarator &D = state.getDeclarator();
5315
5316 // Look for an explicit lifetime attribute.
5317 DeclaratorChunk &chunk = D.getTypeObject(chunkIndex);
5318 if (chunk.getAttrs().hasAttribute(ParsedAttr::AT_ObjCOwnership))
5319 return;
5320
5321 const char *attrStr = nullptr;
5322 switch (ownership) {
5323 case Qualifiers::OCL_None: llvm_unreachable("no ownership!")::llvm::llvm_unreachable_internal("no ownership!", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5323)
;
5324 case Qualifiers::OCL_ExplicitNone: attrStr = "none"; break;
5325 case Qualifiers::OCL_Strong: attrStr = "strong"; break;
5326 case Qualifiers::OCL_Weak: attrStr = "weak"; break;
5327 case Qualifiers::OCL_Autoreleasing: attrStr = "autoreleasing"; break;
5328 }
5329
5330 IdentifierLoc *Arg = new (S.Context) IdentifierLoc;
5331 Arg->Ident = &S.Context.Idents.get(attrStr);
5332 Arg->Loc = SourceLocation();
5333
5334 ArgsUnion Args(Arg);
5335
5336 // If there wasn't one, add one (with an invalid source location
5337 // so that we don't make an AttributedType for it).
5338 ParsedAttr *attr = D.getAttributePool().create(
5339 &S.Context.Idents.get("objc_ownership"), SourceLocation(),
5340 /*scope*/ nullptr, SourceLocation(),
5341 /*args*/ &Args, 1, ParsedAttr::AS_GNU);
5342 chunk.getAttrs().addAtEnd(attr);
5343 // TODO: mark whether we did this inference?
5344}
5345
5346/// Used for transferring ownership in casts resulting in l-values.
5347static void transferARCOwnership(TypeProcessingState &state,
5348 QualType &declSpecTy,
5349 Qualifiers::ObjCLifetime ownership) {
5350 Sema &S = state.getSema();
5351 Declarator &D = state.getDeclarator();
5352
5353 int inner = -1;
5354 bool hasIndirection = false;
5355 for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) {
5356 DeclaratorChunk &chunk = D.getTypeObject(i);
5357 switch (chunk.Kind) {
5358 case DeclaratorChunk::Paren:
5359 // Ignore parens.
5360 break;
5361
5362 case DeclaratorChunk::Array:
5363 case DeclaratorChunk::Reference:
5364 case DeclaratorChunk::Pointer:
5365 if (inner != -1)
5366 hasIndirection = true;
5367 inner = i;
5368 break;
5369
5370 case DeclaratorChunk::BlockPointer:
5371 if (inner != -1)
5372 transferARCOwnershipToDeclaratorChunk(state, ownership, i);
5373 return;
5374
5375 case DeclaratorChunk::Function:
5376 case DeclaratorChunk::MemberPointer:
5377 case DeclaratorChunk::Pipe:
5378 return;
5379 }
5380 }
5381
5382 if (inner == -1)
5383 return;
5384
5385 DeclaratorChunk &chunk = D.getTypeObject(inner);
5386 if (chunk.Kind == DeclaratorChunk::Pointer) {
5387 if (declSpecTy->isObjCRetainableType())
5388 return transferARCOwnershipToDeclSpec(S, declSpecTy, ownership);
5389 if (declSpecTy->isObjCObjectType() && hasIndirection)
5390 return transferARCOwnershipToDeclaratorChunk(state, ownership, inner);
5391 } else {
5392 assert(chunk.Kind == DeclaratorChunk::Array ||((chunk.Kind == DeclaratorChunk::Array || chunk.Kind == DeclaratorChunk
::Reference) ? static_cast<void> (0) : __assert_fail ("chunk.Kind == DeclaratorChunk::Array || chunk.Kind == DeclaratorChunk::Reference"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5393, __PRETTY_FUNCTION__))
5393 chunk.Kind == DeclaratorChunk::Reference)((chunk.Kind == DeclaratorChunk::Array || chunk.Kind == DeclaratorChunk
::Reference) ? static_cast<void> (0) : __assert_fail ("chunk.Kind == DeclaratorChunk::Array || chunk.Kind == DeclaratorChunk::Reference"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5393, __PRETTY_FUNCTION__))
;
5394 return transferARCOwnershipToDeclSpec(S, declSpecTy, ownership);
5395 }
5396}
5397
5398TypeSourceInfo *Sema::GetTypeForDeclaratorCast(Declarator &D, QualType FromTy) {
5399 TypeProcessingState state(*this, D);
5400
5401 TypeSourceInfo *ReturnTypeInfo = nullptr;
5402 QualType declSpecTy = GetDeclSpecTypeForDeclarator(state, ReturnTypeInfo);
5403
5404 if (getLangOpts().ObjC) {
5405 Qualifiers::ObjCLifetime ownership = Context.getInnerObjCOwnership(FromTy);
5406 if (ownership != Qualifiers::OCL_None)
5407 transferARCOwnership(state, declSpecTy, ownership);
5408 }
5409
5410 return GetFullTypeForDeclarator(state, declSpecTy, ReturnTypeInfo);
5411}
5412
5413static void fillAttributedTypeLoc(AttributedTypeLoc TL,
5414 TypeProcessingState &State) {
5415 TL.setAttr(State.takeAttrForAttributedType(TL.getTypePtr()));
5416}
5417
5418namespace {
5419 class TypeSpecLocFiller : public TypeLocVisitor<TypeSpecLocFiller> {
5420 ASTContext &Context;
5421 TypeProcessingState &State;
5422 const DeclSpec &DS;
5423
5424 public:
5425 TypeSpecLocFiller(ASTContext &Context, TypeProcessingState &State,
5426 const DeclSpec &DS)
5427 : Context(Context), State(State), DS(DS) {}
5428
5429 void VisitAttributedTypeLoc(AttributedTypeLoc TL) {
5430 Visit(TL.getModifiedLoc());
5431 fillAttributedTypeLoc(TL, State);
5432 }
5433 void VisitMacroQualifiedTypeLoc(MacroQualifiedTypeLoc TL) {
5434 Visit(TL.getInnerLoc());
5435 TL.setExpansionLoc(
5436 State.getExpansionLocForMacroQualifiedType(TL.getTypePtr()));
5437 }
5438 void VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
5439 Visit(TL.getUnqualifiedLoc());
5440 }
5441 void VisitTypedefTypeLoc(TypedefTypeLoc TL) {
5442 TL.setNameLoc(DS.getTypeSpecTypeLoc());
5443 }
5444 void VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) {
5445 TL.setNameLoc(DS.getTypeSpecTypeLoc());
5446 // FIXME. We should have DS.getTypeSpecTypeEndLoc(). But, it requires
5447 // addition field. What we have is good enough for dispay of location
5448 // of 'fixit' on interface name.
5449 TL.setNameEndLoc(DS.getEndLoc());
5450 }
5451 void VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) {
5452 TypeSourceInfo *RepTInfo = nullptr;
5453 Sema::GetTypeFromParser(DS.getRepAsType(), &RepTInfo);
5454 TL.copy(RepTInfo->getTypeLoc());
5455 }
5456 void VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
5457 TypeSourceInfo *RepTInfo = nullptr;
5458 Sema::GetTypeFromParser(DS.getRepAsType(), &RepTInfo);
5459 TL.copy(RepTInfo->getTypeLoc());
5460 }
5461 void VisitTemplateSpecializationTypeLoc(TemplateSpecializationTypeLoc TL) {
5462 TypeSourceInfo *TInfo = nullptr;
5463 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
5464
5465 // If we got no declarator info from previous Sema routines,
5466 // just fill with the typespec loc.
5467 if (!TInfo) {
5468 TL.initialize(Context, DS.getTypeSpecTypeNameLoc());
5469 return;
5470 }
5471
5472 TypeLoc OldTL = TInfo->getTypeLoc();
5473 if (TInfo->getType()->getAs<ElaboratedType>()) {
5474 ElaboratedTypeLoc ElabTL = OldTL.castAs<ElaboratedTypeLoc>();
5475 TemplateSpecializationTypeLoc NamedTL = ElabTL.getNamedTypeLoc()
5476 .castAs<TemplateSpecializationTypeLoc>();
5477 TL.copy(NamedTL);
5478 } else {
5479 TL.copy(OldTL.castAs<TemplateSpecializationTypeLoc>());
5480 assert(TL.getRAngleLoc() == OldTL.castAs<TemplateSpecializationTypeLoc>().getRAngleLoc())((TL.getRAngleLoc() == OldTL.castAs<TemplateSpecializationTypeLoc
>().getRAngleLoc()) ? static_cast<void> (0) : __assert_fail
("TL.getRAngleLoc() == OldTL.castAs<TemplateSpecializationTypeLoc>().getRAngleLoc()"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5480, __PRETTY_FUNCTION__))
;
5481 }
5482
5483 }
5484 void VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) {
5485 assert(DS.getTypeSpecType() == DeclSpec::TST_typeofExpr)((DS.getTypeSpecType() == DeclSpec::TST_typeofExpr) ? static_cast
<void> (0) : __assert_fail ("DS.getTypeSpecType() == DeclSpec::TST_typeofExpr"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5485, __PRETTY_FUNCTION__))
;
5486 TL.setTypeofLoc(DS.getTypeSpecTypeLoc());
5487 TL.setParensRange(DS.getTypeofParensRange());
5488 }
5489 void VisitTypeOfTypeLoc(TypeOfTypeLoc TL) {
5490 assert(DS.getTypeSpecType() == DeclSpec::TST_typeofType)((DS.getTypeSpecType() == DeclSpec::TST_typeofType) ? static_cast
<void> (0) : __assert_fail ("DS.getTypeSpecType() == DeclSpec::TST_typeofType"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5490, __PRETTY_FUNCTION__))
;
5491 TL.setTypeofLoc(DS.getTypeSpecTypeLoc());
5492 TL.setParensRange(DS.getTypeofParensRange());
5493 assert(DS.getRepAsType())((DS.getRepAsType()) ? static_cast<void> (0) : __assert_fail
("DS.getRepAsType()", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5493, __PRETTY_FUNCTION__))
;
5494 TypeSourceInfo *TInfo = nullptr;
5495 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
5496 TL.setUnderlyingTInfo(TInfo);
5497 }
5498 void VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) {
5499 // FIXME: This holds only because we only have one unary transform.
5500 assert(DS.getTypeSpecType() == DeclSpec::TST_underlyingType)((DS.getTypeSpecType() == DeclSpec::TST_underlyingType) ? static_cast
<void> (0) : __assert_fail ("DS.getTypeSpecType() == DeclSpec::TST_underlyingType"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5500, __PRETTY_FUNCTION__))
;
5501 TL.setKWLoc(DS.getTypeSpecTypeLoc());
5502 TL.setParensRange(DS.getTypeofParensRange());
5503 assert(DS.getRepAsType())((DS.getRepAsType()) ? static_cast<void> (0) : __assert_fail
("DS.getRepAsType()", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5503, __PRETTY_FUNCTION__))
;
5504 TypeSourceInfo *TInfo = nullptr;
5505 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
5506 TL.setUnderlyingTInfo(TInfo);
5507 }
5508 void VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
5509 // By default, use the source location of the type specifier.
5510 TL.setBuiltinLoc(DS.getTypeSpecTypeLoc());
5511 if (TL.needsExtraLocalData()) {
5512 // Set info for the written builtin specifiers.
5513 TL.getWrittenBuiltinSpecs() = DS.getWrittenBuiltinSpecs();
5514 // Try to have a meaningful source location.
5515 if (TL.getWrittenSignSpec() != TSS_unspecified)
5516 TL.expandBuiltinRange(DS.getTypeSpecSignLoc());
5517 if (TL.getWrittenWidthSpec() != TSW_unspecified)
5518 TL.expandBuiltinRange(DS.getTypeSpecWidthRange());
5519 }
5520 }
5521 void VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) {
5522 ElaboratedTypeKeyword Keyword
5523 = TypeWithKeyword::getKeywordForTypeSpec(DS.getTypeSpecType());
5524 if (DS.getTypeSpecType() == TST_typename) {
5525 TypeSourceInfo *TInfo = nullptr;
5526 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
5527 if (TInfo) {
5528 TL.copy(TInfo->getTypeLoc().castAs<ElaboratedTypeLoc>());
5529 return;
5530 }
5531 }
5532 TL.setElaboratedKeywordLoc(Keyword != ETK_None
5533 ? DS.getTypeSpecTypeLoc()
5534 : SourceLocation());
5535 const CXXScopeSpec& SS = DS.getTypeSpecScope();
5536 TL.setQualifierLoc(SS.getWithLocInContext(Context));
5537 Visit(TL.getNextTypeLoc().getUnqualifiedLoc());
5538 }
5539 void VisitDependentNameTypeLoc(DependentNameTypeLoc TL) {
5540 assert(DS.getTypeSpecType() == TST_typename)((DS.getTypeSpecType() == TST_typename) ? static_cast<void
> (0) : __assert_fail ("DS.getTypeSpecType() == TST_typename"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5540, __PRETTY_FUNCTION__))
;
5541 TypeSourceInfo *TInfo = nullptr;
5542 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
5543 assert(TInfo)((TInfo) ? static_cast<void> (0) : __assert_fail ("TInfo"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5543, __PRETTY_FUNCTION__))
;
5544 TL.copy(TInfo->getTypeLoc().castAs<DependentNameTypeLoc>());
5545 }
5546 void VisitDependentTemplateSpecializationTypeLoc(
5547 DependentTemplateSpecializationTypeLoc TL) {
5548 assert(DS.getTypeSpecType() == TST_typename)((DS.getTypeSpecType() == TST_typename) ? static_cast<void
> (0) : __assert_fail ("DS.getTypeSpecType() == TST_typename"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5548, __PRETTY_FUNCTION__))
;
5549 TypeSourceInfo *TInfo = nullptr;
5550 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
5551 assert(TInfo)((TInfo) ? static_cast<void> (0) : __assert_fail ("TInfo"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5551, __PRETTY_FUNCTION__))
;
5552 TL.copy(
5553 TInfo->getTypeLoc().castAs<DependentTemplateSpecializationTypeLoc>());
5554 }
5555 void VisitTagTypeLoc(TagTypeLoc TL) {
5556 TL.setNameLoc(DS.getTypeSpecTypeNameLoc());
5557 }
5558 void VisitAtomicTypeLoc(AtomicTypeLoc TL) {
5559 // An AtomicTypeLoc can come from either an _Atomic(...) type specifier
5560 // or an _Atomic qualifier.
5561 if (DS.getTypeSpecType() == DeclSpec::TST_atomic) {
5562 TL.setKWLoc(DS.getTypeSpecTypeLoc());
5563 TL.setParensRange(DS.getTypeofParensRange());
5564
5565 TypeSourceInfo *TInfo = nullptr;
5566 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
5567 assert(TInfo)((TInfo) ? static_cast<void> (0) : __assert_fail ("TInfo"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5567, __PRETTY_FUNCTION__))
;
5568 TL.getValueLoc().initializeFullCopy(TInfo->getTypeLoc());
5569 } else {
5570 TL.setKWLoc(DS.getAtomicSpecLoc());
5571 // No parens, to indicate this was spelled as an _Atomic qualifier.
5572 TL.setParensRange(SourceRange());
5573 Visit(TL.getValueLoc());
5574 }
5575 }
5576
5577 void VisitPipeTypeLoc(PipeTypeLoc TL) {
5578 TL.setKWLoc(DS.getTypeSpecTypeLoc());
5579
5580 TypeSourceInfo *TInfo = nullptr;
5581 Sema::GetTypeFromParser(DS.getRepAsType(), &TInfo);
5582 TL.getValueLoc().initializeFullCopy(TInfo->getTypeLoc());
5583 }
5584
5585 void VisitTypeLoc(TypeLoc TL) {
5586 // FIXME: add other typespec types and change this to an assert.
5587 TL.initialize(Context, DS.getTypeSpecTypeLoc());
5588 }
5589 };
5590
5591 class DeclaratorLocFiller : public TypeLocVisitor<DeclaratorLocFiller> {
5592 ASTContext &Context;
5593 TypeProcessingState &State;
5594 const DeclaratorChunk &Chunk;
5595
5596 public:
5597 DeclaratorLocFiller(ASTContext &Context, TypeProcessingState &State,
5598 const DeclaratorChunk &Chunk)
5599 : Context(Context), State(State), Chunk(Chunk) {}
5600
5601 void VisitQualifiedTypeLoc(QualifiedTypeLoc TL) {
5602 llvm_unreachable("qualified type locs not expected here!")::llvm::llvm_unreachable_internal("qualified type locs not expected here!"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5602)
;
5603 }
5604 void VisitDecayedTypeLoc(DecayedTypeLoc TL) {
5605 llvm_unreachable("decayed type locs not expected here!")::llvm::llvm_unreachable_internal("decayed type locs not expected here!"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5605)
;
5606 }
5607
5608 void VisitAttributedTypeLoc(AttributedTypeLoc TL) {
5609 fillAttributedTypeLoc(TL, State);
5610 }
5611 void VisitAdjustedTypeLoc(AdjustedTypeLoc TL) {
5612 // nothing
5613 }
5614 void VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) {
5615 assert(Chunk.Kind == DeclaratorChunk::BlockPointer)((Chunk.Kind == DeclaratorChunk::BlockPointer) ? static_cast<
void> (0) : __assert_fail ("Chunk.Kind == DeclaratorChunk::BlockPointer"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5615, __PRETTY_FUNCTION__))
;
5616 TL.setCaretLoc(Chunk.Loc);
5617 }
5618 void VisitPointerTypeLoc(PointerTypeLoc TL) {
5619 assert(Chunk.Kind == DeclaratorChunk::Pointer)((Chunk.Kind == DeclaratorChunk::Pointer) ? static_cast<void
> (0) : __assert_fail ("Chunk.Kind == DeclaratorChunk::Pointer"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5619, __PRETTY_FUNCTION__))
;
5620 TL.setStarLoc(Chunk.Loc);
5621 }
5622 void VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) {
5623 assert(Chunk.Kind == DeclaratorChunk::Pointer)((Chunk.Kind == DeclaratorChunk::Pointer) ? static_cast<void
> (0) : __assert_fail ("Chunk.Kind == DeclaratorChunk::Pointer"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5623, __PRETTY_FUNCTION__))
;
5624 TL.setStarLoc(Chunk.Loc);
5625 }
5626 void VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) {
5627 assert(Chunk.Kind == DeclaratorChunk::MemberPointer)((Chunk.Kind == DeclaratorChunk::MemberPointer) ? static_cast
<void> (0) : __assert_fail ("Chunk.Kind == DeclaratorChunk::MemberPointer"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5627, __PRETTY_FUNCTION__))
;
5628 const CXXScopeSpec& SS = Chunk.Mem.Scope();
5629 NestedNameSpecifierLoc NNSLoc = SS.getWithLocInContext(Context);
5630
5631 const Type* ClsTy = TL.getClass();
5632 QualType ClsQT = QualType(ClsTy, 0);
5633 TypeSourceInfo *ClsTInfo = Context.CreateTypeSourceInfo(ClsQT, 0);
5634 // Now copy source location info into the type loc component.
5635 TypeLoc ClsTL = ClsTInfo->getTypeLoc();
5636 switch (NNSLoc.getNestedNameSpecifier()->getKind()) {
5637 case NestedNameSpecifier::Identifier:
5638 assert(isa<DependentNameType>(ClsTy) && "Unexpected TypeLoc")((isa<DependentNameType>(ClsTy) && "Unexpected TypeLoc"
) ? static_cast<void> (0) : __assert_fail ("isa<DependentNameType>(ClsTy) && \"Unexpected TypeLoc\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5638, __PRETTY_FUNCTION__))
;
5639 {
5640 DependentNameTypeLoc DNTLoc = ClsTL.castAs<DependentNameTypeLoc>();
5641 DNTLoc.setElaboratedKeywordLoc(SourceLocation());
5642 DNTLoc.setQualifierLoc(NNSLoc.getPrefix());
5643 DNTLoc.setNameLoc(NNSLoc.getLocalBeginLoc());
5644 }
5645 break;
5646
5647 case NestedNameSpecifier::TypeSpec:
5648 case NestedNameSpecifier::TypeSpecWithTemplate:
5649 if (isa<ElaboratedType>(ClsTy)) {
5650 ElaboratedTypeLoc ETLoc = ClsTL.castAs<ElaboratedTypeLoc>();
5651 ETLoc.setElaboratedKeywordLoc(SourceLocation());
5652 ETLoc.setQualifierLoc(NNSLoc.getPrefix());
5653 TypeLoc NamedTL = ETLoc.getNamedTypeLoc();
5654 NamedTL.initializeFullCopy(NNSLoc.getTypeLoc());
5655 } else {
5656 ClsTL.initializeFullCopy(NNSLoc.getTypeLoc());
5657 }
5658 break;
5659
5660 case NestedNameSpecifier::Namespace:
5661 case NestedNameSpecifier::NamespaceAlias:
5662 case NestedNameSpecifier::Global:
5663 case NestedNameSpecifier::Super:
5664 llvm_unreachable("Nested-name-specifier must name a type")::llvm::llvm_unreachable_internal("Nested-name-specifier must name a type"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5664)
;
5665 }
5666
5667 // Finally fill in MemberPointerLocInfo fields.
5668 TL.setStarLoc(Chunk.Loc);
5669 TL.setClassTInfo(ClsTInfo);
5670 }
5671 void VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) {
5672 assert(Chunk.Kind == DeclaratorChunk::Reference)((Chunk.Kind == DeclaratorChunk::Reference) ? static_cast<
void> (0) : __assert_fail ("Chunk.Kind == DeclaratorChunk::Reference"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5672, __PRETTY_FUNCTION__))
;
5673 // 'Amp' is misleading: this might have been originally
5674 /// spelled with AmpAmp.
5675 TL.setAmpLoc(Chunk.Loc);
5676 }
5677 void VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) {
5678 assert(Chunk.Kind == DeclaratorChunk::Reference)((Chunk.Kind == DeclaratorChunk::Reference) ? static_cast<
void> (0) : __assert_fail ("Chunk.Kind == DeclaratorChunk::Reference"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5678, __PRETTY_FUNCTION__))
;
5679 assert(!Chunk.Ref.LValueRef)((!Chunk.Ref.LValueRef) ? static_cast<void> (0) : __assert_fail
("!Chunk.Ref.LValueRef", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5679, __PRETTY_FUNCTION__))
;
5680 TL.setAmpAmpLoc(Chunk.Loc);
5681 }
5682 void VisitArrayTypeLoc(ArrayTypeLoc TL) {
5683 assert(Chunk.Kind == DeclaratorChunk::Array)((Chunk.Kind == DeclaratorChunk::Array) ? static_cast<void
> (0) : __assert_fail ("Chunk.Kind == DeclaratorChunk::Array"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5683, __PRETTY_FUNCTION__))
;
5684 TL.setLBracketLoc(Chunk.Loc);
5685 TL.setRBracketLoc(Chunk.EndLoc);
5686 TL.setSizeExpr(static_cast<Expr*>(Chunk.Arr.NumElts));
5687 }
5688 void VisitFunctionTypeLoc(FunctionTypeLoc TL) {
5689 assert(Chunk.Kind == DeclaratorChunk::Function)((Chunk.Kind == DeclaratorChunk::Function) ? static_cast<void
> (0) : __assert_fail ("Chunk.Kind == DeclaratorChunk::Function"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5689, __PRETTY_FUNCTION__))
;
5690 TL.setLocalRangeBegin(Chunk.Loc);
5691 TL.setLocalRangeEnd(Chunk.EndLoc);
5692
5693 const DeclaratorChunk::FunctionTypeInfo &FTI = Chunk.Fun;
5694 TL.setLParenLoc(FTI.getLParenLoc());
5695 TL.setRParenLoc(FTI.getRParenLoc());
5696 for (unsigned i = 0, e = TL.getNumParams(), tpi = 0; i != e; ++i) {
5697 ParmVarDecl *Param = cast<ParmVarDecl>(FTI.Params[i].Param);
5698 TL.setParam(tpi++, Param);
5699 }
5700 TL.setExceptionSpecRange(FTI.getExceptionSpecRange());
5701 }
5702 void VisitParenTypeLoc(ParenTypeLoc TL) {
5703 assert(Chunk.Kind == DeclaratorChunk::Paren)((Chunk.Kind == DeclaratorChunk::Paren) ? static_cast<void
> (0) : __assert_fail ("Chunk.Kind == DeclaratorChunk::Paren"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5703, __PRETTY_FUNCTION__))
;
5704 TL.setLParenLoc(Chunk.Loc);
5705 TL.setRParenLoc(Chunk.EndLoc);
5706 }
5707 void VisitPipeTypeLoc(PipeTypeLoc TL) {
5708 assert(Chunk.Kind == DeclaratorChunk::Pipe)((Chunk.Kind == DeclaratorChunk::Pipe) ? static_cast<void>
(0) : __assert_fail ("Chunk.Kind == DeclaratorChunk::Pipe", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5708, __PRETTY_FUNCTION__))
;
5709 TL.setKWLoc(Chunk.Loc);
5710 }
5711 void VisitMacroQualifiedTypeLoc(MacroQualifiedTypeLoc TL) {
5712 TL.setExpansionLoc(Chunk.Loc);
5713 }
5714
5715 void VisitTypeLoc(TypeLoc TL) {
5716 llvm_unreachable("unsupported TypeLoc kind in declarator!")::llvm::llvm_unreachable_internal("unsupported TypeLoc kind in declarator!"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5716)
;
5717 }
5718 };
5719} // end anonymous namespace
5720
5721static void fillAtomicQualLoc(AtomicTypeLoc ATL, const DeclaratorChunk &Chunk) {
5722 SourceLocation Loc;
5723 switch (Chunk.Kind) {
5724 case DeclaratorChunk::Function:
5725 case DeclaratorChunk::Array:
5726 case DeclaratorChunk::Paren:
5727 case DeclaratorChunk::Pipe:
5728 llvm_unreachable("cannot be _Atomic qualified")::llvm::llvm_unreachable_internal("cannot be _Atomic qualified"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5728)
;
5729
5730 case DeclaratorChunk::Pointer:
5731 Loc = SourceLocation::getFromRawEncoding(Chunk.Ptr.AtomicQualLoc);
5732 break;
5733
5734 case DeclaratorChunk::BlockPointer:
5735 case DeclaratorChunk::Reference:
5736 case DeclaratorChunk::MemberPointer:
5737 // FIXME: Provide a source location for the _Atomic keyword.
5738 break;
5739 }
5740
5741 ATL.setKWLoc(Loc);
5742 ATL.setParensRange(SourceRange());
5743}
5744
5745static void
5746fillDependentAddressSpaceTypeLoc(DependentAddressSpaceTypeLoc DASTL,
5747 const ParsedAttributesView &Attrs) {
5748 for (const ParsedAttr &AL : Attrs) {
5749 if (AL.getKind() == ParsedAttr::AT_AddressSpace) {
5750 DASTL.setAttrNameLoc(AL.getLoc());
5751 DASTL.setAttrExprOperand(AL.getArgAsExpr(0));
5752 DASTL.setAttrOperandParensRange(SourceRange());
5753 return;
5754 }
5755 }
5756
5757 llvm_unreachable(::llvm::llvm_unreachable_internal("no address_space attribute found at the expected location!"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5758)
5758 "no address_space attribute found at the expected location!")::llvm::llvm_unreachable_internal("no address_space attribute found at the expected location!"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5758)
;
5759}
5760
5761/// Create and instantiate a TypeSourceInfo with type source information.
5762///
5763/// \param T QualType referring to the type as written in source code.
5764///
5765/// \param ReturnTypeInfo For declarators whose return type does not show
5766/// up in the normal place in the declaration specifiers (such as a C++
5767/// conversion function), this pointer will refer to a type source information
5768/// for that return type.
5769static TypeSourceInfo *
5770GetTypeSourceInfoForDeclarator(TypeProcessingState &State,
5771 QualType T, TypeSourceInfo *ReturnTypeInfo) {
5772 Sema &S = State.getSema();
5773 Declarator &D = State.getDeclarator();
5774
5775 TypeSourceInfo *TInfo = S.Context.CreateTypeSourceInfo(T);
5776 UnqualTypeLoc CurrTL = TInfo->getTypeLoc().getUnqualifiedLoc();
5777
5778 // Handle parameter packs whose type is a pack expansion.
5779 if (isa<PackExpansionType>(T)) {
5780 CurrTL.castAs<PackExpansionTypeLoc>().setEllipsisLoc(D.getEllipsisLoc());
5781 CurrTL = CurrTL.getNextTypeLoc().getUnqualifiedLoc();
5782 }
5783
5784 for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) {
5785 // An AtomicTypeLoc might be produced by an atomic qualifier in this
5786 // declarator chunk.
5787 if (AtomicTypeLoc ATL = CurrTL.getAs<AtomicTypeLoc>()) {
5788 fillAtomicQualLoc(ATL, D.getTypeObject(i));
5789 CurrTL = ATL.getValueLoc().getUnqualifiedLoc();
5790 }
5791
5792 while (MacroQualifiedTypeLoc TL = CurrTL.getAs<MacroQualifiedTypeLoc>()) {
5793 TL.setExpansionLoc(
5794 State.getExpansionLocForMacroQualifiedType(TL.getTypePtr()));
5795 CurrTL = TL.getNextTypeLoc().getUnqualifiedLoc();
5796 }
5797
5798 while (AttributedTypeLoc TL = CurrTL.getAs<AttributedTypeLoc>()) {
5799 fillAttributedTypeLoc(TL, State);
5800 CurrTL = TL.getNextTypeLoc().getUnqualifiedLoc();
5801 }
5802
5803 while (DependentAddressSpaceTypeLoc TL =
5804 CurrTL.getAs<DependentAddressSpaceTypeLoc>()) {
5805 fillDependentAddressSpaceTypeLoc(TL, D.getTypeObject(i).getAttrs());
5806 CurrTL = TL.getPointeeTypeLoc().getUnqualifiedLoc();
5807 }
5808
5809 // FIXME: Ordering here?
5810 while (AdjustedTypeLoc TL = CurrTL.getAs<AdjustedTypeLoc>())
5811 CurrTL = TL.getNextTypeLoc().getUnqualifiedLoc();
5812
5813 DeclaratorLocFiller(S.Context, State, D.getTypeObject(i)).Visit(CurrTL);
5814 CurrTL = CurrTL.getNextTypeLoc().getUnqualifiedLoc();
5815 }
5816
5817 // If we have different source information for the return type, use
5818 // that. This really only applies to C++ conversion functions.
5819 if (ReturnTypeInfo) {
5820 TypeLoc TL = ReturnTypeInfo->getTypeLoc();
5821 assert(TL.getFullDataSize() == CurrTL.getFullDataSize())((TL.getFullDataSize() == CurrTL.getFullDataSize()) ? static_cast
<void> (0) : __assert_fail ("TL.getFullDataSize() == CurrTL.getFullDataSize()"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5821, __PRETTY_FUNCTION__))
;
5822 memcpy(CurrTL.getOpaqueData(), TL.getOpaqueData(), TL.getFullDataSize());
5823 } else {
5824 TypeSpecLocFiller(S.Context, State, D.getDeclSpec()).Visit(CurrTL);
5825 }
5826
5827 return TInfo;
5828}
5829
5830/// Create a LocInfoType to hold the given QualType and TypeSourceInfo.
5831ParsedType Sema::CreateParsedType(QualType T, TypeSourceInfo *TInfo) {
5832 // FIXME: LocInfoTypes are "transient", only needed for passing to/from Parser
5833 // and Sema during declaration parsing. Try deallocating/caching them when
5834 // it's appropriate, instead of allocating them and keeping them around.
5835 LocInfoType *LocT = (LocInfoType*)BumpAlloc.Allocate(sizeof(LocInfoType),
5836 TypeAlignment);
5837 new (LocT) LocInfoType(T, TInfo);
5838 assert(LocT->getTypeClass() != T->getTypeClass() &&((LocT->getTypeClass() != T->getTypeClass() && "LocInfoType's TypeClass conflicts with an existing Type class"
) ? static_cast<void> (0) : __assert_fail ("LocT->getTypeClass() != T->getTypeClass() && \"LocInfoType's TypeClass conflicts with an existing Type class\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5839, __PRETTY_FUNCTION__))
5839 "LocInfoType's TypeClass conflicts with an existing Type class")((LocT->getTypeClass() != T->getTypeClass() && "LocInfoType's TypeClass conflicts with an existing Type class"
) ? static_cast<void> (0) : __assert_fail ("LocT->getTypeClass() != T->getTypeClass() && \"LocInfoType's TypeClass conflicts with an existing Type class\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5839, __PRETTY_FUNCTION__))
;
5840 return ParsedType::make(QualType(LocT, 0));
5841}
5842
5843void LocInfoType::getAsStringInternal(std::string &Str,
5844 const PrintingPolicy &Policy) const {
5845 llvm_unreachable("LocInfoType leaked into the type system; an opaque TypeTy*"::llvm::llvm_unreachable_internal("LocInfoType leaked into the type system; an opaque TypeTy*"
" was used directly instead of getting the QualType through"
" GetTypeFromParser", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5847)
5846 " was used directly instead of getting the QualType through"::llvm::llvm_unreachable_internal("LocInfoType leaked into the type system; an opaque TypeTy*"
" was used directly instead of getting the QualType through"
" GetTypeFromParser", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5847)
5847 " GetTypeFromParser")::llvm::llvm_unreachable_internal("LocInfoType leaked into the type system; an opaque TypeTy*"
" was used directly instead of getting the QualType through"
" GetTypeFromParser", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5847)
;
5848}
5849
5850TypeResult Sema::ActOnTypeName(Scope *S, Declarator &D) {
5851 // C99 6.7.6: Type names have no identifier. This is already validated by
5852 // the parser.
5853 assert(D.getIdentifier() == nullptr &&((D.getIdentifier() == nullptr && "Type name should have no identifier!"
) ? static_cast<void> (0) : __assert_fail ("D.getIdentifier() == nullptr && \"Type name should have no identifier!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5854, __PRETTY_FUNCTION__))
5854 "Type name should have no identifier!")((D.getIdentifier() == nullptr && "Type name should have no identifier!"
) ? static_cast<void> (0) : __assert_fail ("D.getIdentifier() == nullptr && \"Type name should have no identifier!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Sema/SemaType.cpp"
, 5854, __PRETTY_FUNCTION__))
;
5855
5856 TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S);
5857 QualType T = TInfo->getType();
5858 if (D.isInvalidType())
5859 return true;
5860
5861 // Make sure there are no unused decl attributes on the declarator.
5862 // We don't want to do this for ObjC parameters because we're going
5863 // to apply them to the actual parameter declaration.
5864 // Likewise, we don't want to do this for alias declarations, because
5865 // we are actually going to build a declaration from this eventually.
5866 if (D.getContext() != DeclaratorContext::ObjCParameterContext &&
5867 D.getContext() != DeclaratorContext::AliasDeclContext &&
5868 D.getContext() != DeclaratorContext::AliasTemplateContext)
5869 checkUnusedDeclAttributes(D);
5870
5871 if (getLangOpts().CPlusPlus) {
5872 // Check that there are no default arguments (C++ only).
5873 CheckExtraCXXDefaultArguments(D);
5874 }
5875
5876 return CreateParsedType(T, TInfo);
5877}
5878
5879ParsedType Sema::ActOnObjCInstanceType(SourceLocation Loc) {
5880 QualType T = Context.getObjCInstanceType();
5881 TypeSourceInfo *TInfo = Context.getTrivialTypeSourceInfo(T, Loc);
5882 return CreateParsedType(T, TInfo);
5883}
5884
5885//===----------------------------------------------------------------------===//
5886// Type Attribute Processing
5887//===----------------------------------------------------------------------===//
5888
5889/// Build an AddressSpace index from a constant expression and diagnose any
5890/// errors related to invalid address_spaces. Returns true on successfully
5891/// building an AddressSpace index.
5892static bool BuildAddressSpaceIndex(Sema &S, LangAS &ASIdx,
5893 const Expr *AddrSpace,
5894 SourceLocation AttrLoc) {
5895 if (!AddrSpace->isValueDependent()) {
5896 llvm::APSInt addrSpace(32);
5897 if (!AddrSpace->isIntegerConstantExpr(addrSpace, S.Context)) {
5898 S.Diag(AttrLoc, diag::err_attribute_argument_type)
5899 << "'address_space'" << AANT_ArgumentIntegerConstant
5900 << AddrSpace->getSourceRange();
5901 return false;
5902 }
5903
5904 // Bounds checking.
5905 if (addrSpace.isSigned()) {
5906 if (addrSpace.isNegative()) {
5907 S.Diag(AttrLoc, diag::err_attribute_address_space_negative)
5908 << AddrSpace->getSourceRange();
5909 return false;
5910 }
5911 addrSpace.setIsSigned(false);
5912 }
5913
5914 llvm::APSInt max(addrSpace.getBitWidth());
5915 max =
5916 Qualifiers::MaxAddressSpace - (unsigned)LangAS::FirstTargetAddressSpace;
5917 if (addrSpace > max) {
5918 S.Diag(AttrLoc, diag::err_attribute_address_space_too_high)
5919 << (unsigned)max.getZExtValue() << AddrSpace->getSourceRange();
5920 return false;
5921 }
5922
5923 ASIdx =
5924 getLangASFromTargetAS(static_cast<unsigned>(addrSpace.getZExtValue()));
5925 return true;
5926 }
5927
5928 // Default value for DependentAddressSpaceTypes
5929 ASIdx = LangAS::Default;
5930 return true;
5931}
5932
5933/// BuildAddressSpaceAttr - Builds a DependentAddressSpaceType if an expression
5934/// is uninstantiated. If instantiated it will apply the appropriate address
5935/// space to the type. This function allows dependent template variables to be
5936/// used in conjunction with the address_space attribute
5937QualType Sema::BuildAddressSpaceAttr(QualType &T, LangAS ASIdx, Expr *AddrSpace,
5938 SourceLocation AttrLoc) {
5939 if (!AddrSpace->isValueDependent()) {
5940 if (DiagnoseMultipleAddrSpaceAttributes(*this, T.getAddressSpace(), ASIdx,
5941 AttrLoc))
5942 return QualType();
5943
5944 return Context.getAddrSpaceQualType(T, ASIdx);
5945 }
5946
5947 // A check with similar intentions as checking if a type already has an
5948 // address space except for on a dependent types, basically if the
5949 // current type is already a DependentAddressSpaceType then its already
5950 // lined up to have another address space on it and we can't have
5951 // multiple address spaces on the one pointer indirection
5952 if (T->getAs<DependentAddressSpaceType>()) {
5953 Diag(AttrLoc, diag::err_attribute_address_multiple_qualifiers);
5954 return QualType();
5955 }
5956
5957 return Context.getDependentAddressSpaceType(T, AddrSpace, AttrLoc);
5958}
5959
5960QualType Sema::BuildAddressSpaceAttr(QualType &T, Expr *AddrSpace,
5961 SourceLocation AttrLoc) {
5962 LangAS ASIdx;
5963 if (!BuildAddressSpaceIndex(*this, ASIdx, AddrSpace, AttrLoc))
5964 return QualType();
5965 return BuildAddressSpaceAttr(T, ASIdx, AddrSpace, AttrLoc);
5966}
5967
5968/// HandleAddressSpaceTypeAttribute - Process an address_space attribute on the
5969/// specified type. The attribute contains 1 argument, the id of the address
5970/// space for the type.
5971static void HandleAddressSpaceTypeAttribute(QualType &Type,
5972 const ParsedAttr &Attr,
5973 TypeProcessingState &State) {
5974 Sema &S = State.getSema();
5975
5976 // ISO/IEC TR 18037 S5.3 (amending C99 6.7.3): "A function type shall not be
5977 // qualified by an address-space qualifier."
5978 if (Type->isFunctionType()) {
5979 S.Diag(Attr.getLoc(), diag::err_attribute_address_function_type);
5980 Attr.setInvalid();
5981 return;
5982 }
5983
5984 LangAS ASIdx;
5985 if (Attr.getKind() == ParsedAttr::AT_AddressSpace) {
5986
5987 // Check the attribute arguments.
5988 if (Attr.getNumArgs() != 1) {
5989 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << Attr
5990 << 1;
5991 Attr.setInvalid();
5992 return;
5993 }
5994
5995 Expr *ASArgExpr;
5996 if (Attr.isArgIdent(0)) {
5997 // Special case where the argument is a template id.
5998 CXXScopeSpec SS;
5999 SourceLocation TemplateKWLoc;
6000 UnqualifiedId id;
6001 id.setIdentifier(Attr.getArgAsIdent(0)->Ident, Attr.getLoc());
6002
6003 ExprResult AddrSpace = S.ActOnIdExpression(
6004 S.getCurScope(), SS, TemplateKWLoc, id, /*HasTrailingLParen=*/false,
6005 /*IsAddressOfOperand=*/false);
6006 if (AddrSpace.isInvalid())
6007 return;
6008
6009 ASArgExpr = static_cast<Expr *>(AddrSpace.get());
6010 } else {
6011 ASArgExpr = static_cast<Expr *>(Attr.getArgAsExpr(0));
6012 }
6013
6014 LangAS ASIdx;
6015 if (!BuildAddressSpaceIndex(S, ASIdx, ASArgExpr, Attr.getLoc())) {
6016 Attr.setInvalid();
6017 return;
6018 }
6019
6020 ASTContext &Ctx = S.Context;
6021 auto *ASAttr =
6022 ::new (Ctx) AddressSpaceAttr(Ctx, Attr, static_cast<unsigned>(ASIdx));
6023
6024 // If the expression is not value dependent (not templated), then we can
6025 // apply the address space qualifiers just to the equivalent type.
6026 // Otherwise, we make an AttributedType with the modified and equivalent
6027 // type the same, and wrap it in a DependentAddressSpaceType. When this