Bug Summary

File:tools/clang/include/clang/Sema/Sema.h
Warning:line 275, column 7
Excessive padding in 'class clang::Sema' (75 padding bytes, where 3 is optimal). Optimal fields order: ExternalSource, LangOpts, PP, Context, Consumer, Diags, SourceMgr, CodeCompleter, CurContext, OriginalLexicalContext, VAListTagName, CurInitSeg, VisContext, PragmaAttributeCurrentTargetDecl, FieldCollector, PureVirtualClassDiagSet, LateTemplateParser, LateTemplateParserCleanup, OpaqueParser, DelayedDiagnostics, TUScope, StdNamespace, StdBadAlloc, StdAlignValT, StdExperimentalNamespaceCache, StdInitializerList, CXXTypeInfoDecl, MSVCGuidDecl, NSAPIObj, NSNumberDecl, NSValueDecl, NSNumberPointer, NSValuePointer, NSStringDecl, NSStringPointer, StringWithUTF8StringMethod, ValueWithBytesObjCTypeMethod, NSArrayDecl, ArrayWithObjectsMethod, NSDictionaryDecl, DictionaryWithObjectsMethod, QIDNSCopying, RespondsToSelectorSel, CXXThisTypeOverride, CurrentInstantiationScope, ThreadSafetyDeclCache, VarDataSharingAttributesStack, TypeTagForDatatypeMagicValues, CurScope, Ident_super, Ident___float128, Ident__Nonnull, Ident__Nullable, Ident__Null_unspecified, Ident_NSError, SemaPPCallbackHandler, CFError, IdResolver, SpecialMemberCache, TemplateInstCallbacks, OpenCLFeatures, ExtnameUndeclaredIdentifiers, FlagBitsCache, UnparsedDefaultArgInstantiations, UnparsedDefaultArgLocs, MethodPool, VisibleModules, ShadowingDecls, VTablesUsed, InstantiatingSpecializations, InstantiatedNonDependentTypes, LookupModulesCache, VisibleNamespaceCache, SuppressedDiagnostics, TypoCorrectionFailures, CurrOpenCLExtension, OpenCLTypeExtMap, OpenCLDeclExtMap, CUDADeferredDiags, LocsWithCUDACallDiags, CUDAKnownEmittedFns, CUDACallGraph, CurrentSEHFinally, PragmaClangBSSSection, PragmaClangDataSection, PragmaClangRodataSection, PragmaClangTextSection, WeakTopLevelDecl, NullabilityMap, MaybeODRUseExprs, FunctionScopes, DeleteExprs, DelayedExceptionSpecChecks, DelayedDefaultedMemberExceptionSpecs, LateParsedTemplateMap, WeakUndeclaredIdentifiers, UndefinedButUsed, ReferencedSelectors, CurrentParameterCopyTypes, DelayedTypos, KnownNamespaces, DelayedDllExportClasses, ParsingInitForAutoVars, SpecialMembersBeingDeclared, TypoCorrectedFunctionDefinitions, ExtVectorDecls, TentativeDefinitions, UnusedFileScopedDecls, DelegatingCtorDecls, PendingInstantiations, PendingLocalImplicitInstantiations, ExprCleanupObjects, AnalysisWarnings, VtorDispStack, PackStack, UnusedLocalTypedefNameCandidates, DataSegStack, BSSSegStack, ConstSegStack, CodeSegStack, PackIncludeStack, NSNumberLiteralMethods, BumpAlloc, PragmaAttributeStack, CodeSynthesisContextLookupModules, MisalignedMembers, VTableUses, UnusedPrivateFields, ModuleScopes, CodeSynthesisContexts, ExprEvalContexts, FPFeatures, MSPointerToMemberRepresentationMethod, ImplicitMSInheritanceAttrLoc, CurInitSegLoc, OptimizeOffPragmaLocation, TUKind, NumSFINAEErrors, NonInstantiationEntries, LastEmittedCodeSynthesisContextDepth, ArgumentPackSubstitutionIndex, TyposCorrected, ForceCUDAHostDeviceDepth, isMultiplexExternalSource, CollectStats, MSStructPragmaOn, IsBuildingRecoveryCallExpr, GlobalNewDeleteDeclared, AllowAbstractFieldReference, LoadedExternalKnownNamespaces, AccessCheckingSFINAE, InNonInstantiationSFINAEContext, DisableTypoCorrection, IsInOpenMPDeclareTargetContext, Cleanup, consider reordering the fields or adding explicit padding members

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 SemaAttr.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-eagerly-assume -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 -mrelocation-model pic -pic-level 2 -mthread-model posix -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-7/lib/clang/7.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn325118/build-llvm/tools/clang/lib/Sema -I /build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/Sema -I /build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn325118/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn325118/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn325118/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/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++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn325118/build-llvm/tools/clang/lib/Sema -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-02-14-150435-17243-1 -x c++ /build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/Sema/SemaAttr.cpp
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file defines the Sema class, which performs semantic analysis and
11// builds ASTs.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CLANG_SEMA_SEMA_H
16#define LLVM_CLANG_SEMA_SEMA_H
17
18#include "clang/AST/Attr.h"
19#include "clang/AST/Availability.h"
20#include "clang/AST/DeclarationName.h"
21#include "clang/AST/DeclTemplate.h"
22#include "clang/AST/Expr.h"
23#include "clang/AST/ExprObjC.h"
24#include "clang/AST/ExternalASTSource.h"
25#include "clang/AST/LocInfoType.h"
26#include "clang/AST/MangleNumberingContext.h"
27#include "clang/AST/NSAPI.h"
28#include "clang/AST/PrettyPrinter.h"
29#include "clang/AST/StmtCXX.h"
30#include "clang/AST/TypeLoc.h"
31#include "clang/AST/TypeOrdering.h"
32#include "clang/Basic/ExpressionTraits.h"
33#include "clang/Basic/LangOptions.h"
34#include "clang/Basic/Module.h"
35#include "clang/Basic/OpenMPKinds.h"
36#include "clang/Basic/PragmaKinds.h"
37#include "clang/Basic/Specifiers.h"
38#include "clang/Basic/TemplateKinds.h"
39#include "clang/Basic/TypeTraits.h"
40#include "clang/Sema/AnalysisBasedWarnings.h"
41#include "clang/Sema/CleanupInfo.h"
42#include "clang/Sema/DeclSpec.h"
43#include "clang/Sema/ExternalSemaSource.h"
44#include "clang/Sema/IdentifierResolver.h"
45#include "clang/Sema/ObjCMethodList.h"
46#include "clang/Sema/Ownership.h"
47#include "clang/Sema/Scope.h"
48#include "clang/Sema/ScopeInfo.h"
49#include "clang/Sema/TypoCorrection.h"
50#include "clang/Sema/Weak.h"
51#include "llvm/ADT/ArrayRef.h"
52#include "llvm/ADT/Optional.h"
53#include "llvm/ADT/SetVector.h"
54#include "llvm/ADT/SmallPtrSet.h"
55#include "llvm/ADT/SmallVector.h"
56#include "llvm/ADT/TinyPtrVector.h"
57#include <deque>
58#include <memory>
59#include <string>
60#include <vector>
61
62namespace llvm {
63 class APSInt;
64 template <typename ValueT> struct DenseMapInfo;
65 template <typename ValueT, typename ValueInfoT> class DenseSet;
66 class SmallBitVector;
67 struct InlineAsmIdentifierInfo;
68}
69
70namespace clang {
71 class ADLResult;
72 class ASTConsumer;
73 class ASTContext;
74 class ASTMutationListener;
75 class ASTReader;
76 class ASTWriter;
77 class ArrayType;
78 class AttributeList;
79 class BindingDecl;
80 class BlockDecl;
81 class CapturedDecl;
82 class CXXBasePath;
83 class CXXBasePaths;
84 class CXXBindTemporaryExpr;
85 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath;
86 class CXXConstructorDecl;
87 class CXXConversionDecl;
88 class CXXDeleteExpr;
89 class CXXDestructorDecl;
90 class CXXFieldCollector;
91 class CXXMemberCallExpr;
92 class CXXMethodDecl;
93 class CXXScopeSpec;
94 class CXXTemporary;
95 class CXXTryStmt;
96 class CallExpr;
97 class ClassTemplateDecl;
98 class ClassTemplatePartialSpecializationDecl;
99 class ClassTemplateSpecializationDecl;
100 class VarTemplatePartialSpecializationDecl;
101 class CodeCompleteConsumer;
102 class CodeCompletionAllocator;
103 class CodeCompletionTUInfo;
104 class CodeCompletionResult;
105 class CoroutineBodyStmt;
106 class Decl;
107 class DeclAccessPair;
108 class DeclContext;
109 class DeclRefExpr;
110 class DeclaratorDecl;
111 class DeducedTemplateArgument;
112 class DependentDiagnostic;
113 class DesignatedInitExpr;
114 class Designation;
115 class EnableIfAttr;
116 class EnumConstantDecl;
117 class Expr;
118 class ExtVectorType;
119 class FormatAttr;
120 class FriendDecl;
121 class FunctionDecl;
122 class FunctionProtoType;
123 class FunctionTemplateDecl;
124 class ImplicitConversionSequence;
125 typedef MutableArrayRef<ImplicitConversionSequence> ConversionSequenceList;
126 class InitListExpr;
127 class InitializationKind;
128 class InitializationSequence;
129 class InitializedEntity;
130 class IntegerLiteral;
131 class LabelStmt;
132 class LambdaExpr;
133 class LangOptions;
134 class LocalInstantiationScope;
135 class LookupResult;
136 class MacroInfo;
137 typedef ArrayRef<std::pair<IdentifierInfo *, SourceLocation>> ModuleIdPath;
138 class ModuleLoader;
139 class MultiLevelTemplateArgumentList;
140 class NamedDecl;
141 class ObjCCategoryDecl;
142 class ObjCCategoryImplDecl;
143 class ObjCCompatibleAliasDecl;
144 class ObjCContainerDecl;
145 class ObjCImplDecl;
146 class ObjCImplementationDecl;
147 class ObjCInterfaceDecl;
148 class ObjCIvarDecl;
149 template <class T> class ObjCList;
150 class ObjCMessageExpr;
151 class ObjCMethodDecl;
152 class ObjCPropertyDecl;
153 class ObjCProtocolDecl;
154 class OMPThreadPrivateDecl;
155 class OMPDeclareReductionDecl;
156 class OMPDeclareSimdDecl;
157 class OMPClause;
158 struct OverloadCandidate;
159 class OverloadCandidateSet;
160 class OverloadExpr;
161 class ParenListExpr;
162 class ParmVarDecl;
163 class Preprocessor;
164 class PseudoDestructorTypeStorage;
165 class PseudoObjectExpr;
166 class QualType;
167 class StandardConversionSequence;
168 class Stmt;
169 class StringLiteral;
170 class SwitchStmt;
171 class TemplateArgument;
172 class TemplateArgumentList;
173 class TemplateArgumentLoc;
174 class TemplateDecl;
175 class TemplateInstantiationCallback;
176 class TemplateParameterList;
177 class TemplatePartialOrderingContext;
178 class TemplateTemplateParmDecl;
179 class Token;
180 class TypeAliasDecl;
181 class TypedefDecl;
182 class TypedefNameDecl;
183 class TypeLoc;
184 class TypoCorrectionConsumer;
185 class UnqualifiedId;
186 class UnresolvedLookupExpr;
187 class UnresolvedMemberExpr;
188 class UnresolvedSetImpl;
189 class UnresolvedSetIterator;
190 class UsingDecl;
191 class UsingShadowDecl;
192 class ValueDecl;
193 class VarDecl;
194 class VarTemplateSpecializationDecl;
195 class VisibilityAttr;
196 class VisibleDeclConsumer;
197 class IndirectFieldDecl;
198 struct DeductionFailureInfo;
199 class TemplateSpecCandidateSet;
200
201namespace sema {
202 class AccessedEntity;
203 class BlockScopeInfo;
204 class CapturedRegionScopeInfo;
205 class CapturingScopeInfo;
206 class CompoundScopeInfo;
207 class DelayedDiagnostic;
208 class DelayedDiagnosticPool;
209 class FunctionScopeInfo;
210 class LambdaScopeInfo;
211 class PossiblyUnreachableDiag;
212 class SemaPPCallbacks;
213 class TemplateDeductionInfo;
214}
215
216namespace threadSafety {
217 class BeforeSet;
218 void threadSafetyCleanup(BeforeSet* Cache);
219}
220
221// FIXME: No way to easily map from TemplateTypeParmTypes to
222// TemplateTypeParmDecls, so we have this horrible PointerUnion.
223typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>,
224 SourceLocation> UnexpandedParameterPack;
225
226/// Describes whether we've seen any nullability information for the given
227/// file.
228struct FileNullability {
229 /// The first pointer declarator (of any pointer kind) in the file that does
230 /// not have a corresponding nullability annotation.
231 SourceLocation PointerLoc;
232
233 /// The end location for the first pointer declarator in the file. Used for
234 /// placing fix-its.
235 SourceLocation PointerEndLoc;
236
237 /// Which kind of pointer declarator we saw.
238 uint8_t PointerKind;
239
240 /// Whether we saw any type nullability annotations in the given file.
241 bool SawTypeNullability = false;
242};
243
244/// A mapping from file IDs to a record of whether we've seen nullability
245/// information in that file.
246class FileNullabilityMap {
247 /// A mapping from file IDs to the nullability information for each file ID.
248 llvm::DenseMap<FileID, FileNullability> Map;
249
250 /// A single-element cache based on the file ID.
251 struct {
252 FileID File;
253 FileNullability Nullability;
254 } Cache;
255
256public:
257 FileNullability &operator[](FileID file) {
258 // Check the single-element cache.
259 if (file == Cache.File)
260 return Cache.Nullability;
261
262 // It's not in the single-element cache; flush the cache if we have one.
263 if (!Cache.File.isInvalid()) {
264 Map[Cache.File] = Cache.Nullability;
265 }
266
267 // Pull this entry into the cache.
268 Cache.File = file;
269 Cache.Nullability = Map[file];
270 return Cache.Nullability;
271 }
272};
273
274/// Sema - This implements semantic analysis and AST building for C.
275class Sema {
Excessive padding in 'class clang::Sema' (75 padding bytes, where 3 is optimal). Optimal fields order: ExternalSource, LangOpts, PP, Context, Consumer, Diags, SourceMgr, CodeCompleter, CurContext, OriginalLexicalContext, VAListTagName, CurInitSeg, VisContext, PragmaAttributeCurrentTargetDecl, FieldCollector, PureVirtualClassDiagSet, LateTemplateParser, LateTemplateParserCleanup, OpaqueParser, DelayedDiagnostics, TUScope, StdNamespace, StdBadAlloc, StdAlignValT, StdExperimentalNamespaceCache, StdInitializerList, CXXTypeInfoDecl, MSVCGuidDecl, NSAPIObj, NSNumberDecl, NSValueDecl, NSNumberPointer, NSValuePointer, NSStringDecl, NSStringPointer, StringWithUTF8StringMethod, ValueWithBytesObjCTypeMethod, NSArrayDecl, ArrayWithObjectsMethod, NSDictionaryDecl, DictionaryWithObjectsMethod, QIDNSCopying, RespondsToSelectorSel, CXXThisTypeOverride, CurrentInstantiationScope, ThreadSafetyDeclCache, VarDataSharingAttributesStack, TypeTagForDatatypeMagicValues, CurScope, Ident_super, Ident___float128, Ident__Nonnull, Ident__Nullable, Ident__Null_unspecified, Ident_NSError, SemaPPCallbackHandler, CFError, IdResolver, SpecialMemberCache, TemplateInstCallbacks, OpenCLFeatures, ExtnameUndeclaredIdentifiers, FlagBitsCache, UnparsedDefaultArgInstantiations, UnparsedDefaultArgLocs, MethodPool, VisibleModules, ShadowingDecls, VTablesUsed, InstantiatingSpecializations, InstantiatedNonDependentTypes, LookupModulesCache, VisibleNamespaceCache, SuppressedDiagnostics, TypoCorrectionFailures, CurrOpenCLExtension, OpenCLTypeExtMap, OpenCLDeclExtMap, CUDADeferredDiags, LocsWithCUDACallDiags, CUDAKnownEmittedFns, CUDACallGraph, CurrentSEHFinally, PragmaClangBSSSection, PragmaClangDataSection, PragmaClangRodataSection, PragmaClangTextSection, WeakTopLevelDecl, NullabilityMap, MaybeODRUseExprs, FunctionScopes, DeleteExprs, DelayedExceptionSpecChecks, DelayedDefaultedMemberExceptionSpecs, LateParsedTemplateMap, WeakUndeclaredIdentifiers, UndefinedButUsed, ReferencedSelectors, CurrentParameterCopyTypes, DelayedTypos, KnownNamespaces, DelayedDllExportClasses, ParsingInitForAutoVars, SpecialMembersBeingDeclared, TypoCorrectedFunctionDefinitions, ExtVectorDecls, TentativeDefinitions, UnusedFileScopedDecls, DelegatingCtorDecls, PendingInstantiations, PendingLocalImplicitInstantiations, ExprCleanupObjects, AnalysisWarnings, VtorDispStack, PackStack, UnusedLocalTypedefNameCandidates, DataSegStack, BSSSegStack, ConstSegStack, CodeSegStack, PackIncludeStack, NSNumberLiteralMethods, BumpAlloc, PragmaAttributeStack, CodeSynthesisContextLookupModules, MisalignedMembers, VTableUses, UnusedPrivateFields, ModuleScopes, CodeSynthesisContexts, ExprEvalContexts, FPFeatures, MSPointerToMemberRepresentationMethod, ImplicitMSInheritanceAttrLoc, CurInitSegLoc, OptimizeOffPragmaLocation, TUKind, NumSFINAEErrors, NonInstantiationEntries, LastEmittedCodeSynthesisContextDepth, ArgumentPackSubstitutionIndex, TyposCorrected, ForceCUDAHostDeviceDepth, isMultiplexExternalSource, CollectStats, MSStructPragmaOn, IsBuildingRecoveryCallExpr, GlobalNewDeleteDeclared, AllowAbstractFieldReference, LoadedExternalKnownNamespaces, AccessCheckingSFINAE, InNonInstantiationSFINAEContext, DisableTypoCorrection, IsInOpenMPDeclareTargetContext, Cleanup, consider reordering the fields or adding explicit padding members
276 Sema(const Sema &) = delete;
277 void operator=(const Sema &) = delete;
278
279 ///\brief Source of additional semantic information.
280 ExternalSemaSource *ExternalSource;
281
282 ///\brief Whether Sema has generated a multiplexer and has to delete it.
283 bool isMultiplexExternalSource;
284
285 static bool mightHaveNonExternalLinkage(const DeclaratorDecl *FD);
286
287 bool isVisibleSlow(const NamedDecl *D);
288
289 /// Determine whether two declarations should be linked together, given that
290 /// the old declaration might not be visible and the new declaration might
291 /// not have external linkage.
292 bool shouldLinkPossiblyHiddenDecl(const NamedDecl *Old,
293 const NamedDecl *New) {
294 if (isVisible(Old))
295 return true;
296 // See comment in below overload for why it's safe to compute the linkage
297 // of the new declaration here.
298 if (New->isExternallyDeclarable()) {
299 assert(Old->isExternallyDeclarable() &&(static_cast <bool> (Old->isExternallyDeclarable() &&
"should not have found a non-externally-declarable previous decl"
) ? void (0) : __assert_fail ("Old->isExternallyDeclarable() && \"should not have found a non-externally-declarable previous decl\""
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 300, __extension__ __PRETTY_FUNCTION__))
300 "should not have found a non-externally-declarable previous decl")(static_cast <bool> (Old->isExternallyDeclarable() &&
"should not have found a non-externally-declarable previous decl"
) ? void (0) : __assert_fail ("Old->isExternallyDeclarable() && \"should not have found a non-externally-declarable previous decl\""
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 300, __extension__ __PRETTY_FUNCTION__))
;
301 return true;
302 }
303 return false;
304 }
305 bool shouldLinkPossiblyHiddenDecl(LookupResult &Old, const NamedDecl *New);
306
307public:
308 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy;
309 typedef OpaquePtr<TemplateName> TemplateTy;
310 typedef OpaquePtr<QualType> TypeTy;
311
312 OpenCLOptions OpenCLFeatures;
313 FPOptions FPFeatures;
314
315 const LangOptions &LangOpts;
316 Preprocessor &PP;
317 ASTContext &Context;
318 ASTConsumer &Consumer;
319 DiagnosticsEngine &Diags;
320 SourceManager &SourceMgr;
321
322 /// \brief Flag indicating whether or not to collect detailed statistics.
323 bool CollectStats;
324
325 /// \brief Code-completion consumer.
326 CodeCompleteConsumer *CodeCompleter;
327
328 /// CurContext - This is the current declaration context of parsing.
329 DeclContext *CurContext;
330
331 /// \brief Generally null except when we temporarily switch decl contexts,
332 /// like in \see ActOnObjCTemporaryExitContainerContext.
333 DeclContext *OriginalLexicalContext;
334
335 /// VAListTagName - The declaration name corresponding to __va_list_tag.
336 /// This is used as part of a hack to omit that class from ADL results.
337 DeclarationName VAListTagName;
338
339 bool MSStructPragmaOn; // True when \#pragma ms_struct on
340
341 /// \brief Controls member pointer representation format under the MS ABI.
342 LangOptions::PragmaMSPointersToMembersKind
343 MSPointerToMemberRepresentationMethod;
344
345 /// Stack of active SEH __finally scopes. Can be empty.
346 SmallVector<Scope*, 2> CurrentSEHFinally;
347
348 /// \brief Source location for newly created implicit MSInheritanceAttrs
349 SourceLocation ImplicitMSInheritanceAttrLoc;
350
351 /// \brief pragma clang section kind
352 enum PragmaClangSectionKind {
353 PCSK_Invalid = 0,
354 PCSK_BSS = 1,
355 PCSK_Data = 2,
356 PCSK_Rodata = 3,
357 PCSK_Text = 4
358 };
359
360 enum PragmaClangSectionAction {
361 PCSA_Set = 0,
362 PCSA_Clear = 1
363 };
364
365 struct PragmaClangSection {
366 std::string SectionName;
367 bool Valid = false;
368 SourceLocation PragmaLocation;
369
370 void Act(SourceLocation PragmaLocation,
371 PragmaClangSectionAction Action,
372 StringLiteral* Name);
373 };
374
375 PragmaClangSection PragmaClangBSSSection;
376 PragmaClangSection PragmaClangDataSection;
377 PragmaClangSection PragmaClangRodataSection;
378 PragmaClangSection PragmaClangTextSection;
379
380 enum PragmaMsStackAction {
381 PSK_Reset = 0x0, // #pragma ()
382 PSK_Set = 0x1, // #pragma (value)
383 PSK_Push = 0x2, // #pragma (push[, id])
384 PSK_Pop = 0x4, // #pragma (pop[, id])
385 PSK_Show = 0x8, // #pragma (show) -- only for "pack"!
386 PSK_Push_Set = PSK_Push | PSK_Set, // #pragma (push[, id], value)
387 PSK_Pop_Set = PSK_Pop | PSK_Set, // #pragma (pop[, id], value)
388 };
389
390 template<typename ValueType>
391 struct PragmaStack {
392 struct Slot {
393 llvm::StringRef StackSlotLabel;
394 ValueType Value;
395 SourceLocation PragmaLocation;
396 SourceLocation PragmaPushLocation;
397 Slot(llvm::StringRef StackSlotLabel, ValueType Value,
398 SourceLocation PragmaLocation, SourceLocation PragmaPushLocation)
399 : StackSlotLabel(StackSlotLabel), Value(Value),
400 PragmaLocation(PragmaLocation),
401 PragmaPushLocation(PragmaPushLocation) {}
402 };
403 void Act(SourceLocation PragmaLocation,
404 PragmaMsStackAction Action,
405 llvm::StringRef StackSlotLabel,
406 ValueType Value);
407
408 // MSVC seems to add artificial slots to #pragma stacks on entering a C++
409 // method body to restore the stacks on exit, so it works like this:
410 //
411 // struct S {
412 // #pragma <name>(push, InternalPragmaSlot, <current_pragma_value>)
413 // void Method {}
414 // #pragma <name>(pop, InternalPragmaSlot)
415 // };
416 //
417 // It works even with #pragma vtordisp, although MSVC doesn't support
418 // #pragma vtordisp(push [, id], n)
419 // syntax.
420 //
421 // Push / pop a named sentinel slot.
422 void SentinelAction(PragmaMsStackAction Action, StringRef Label) {
423 assert((Action == PSK_Push || Action == PSK_Pop) &&(static_cast <bool> ((Action == PSK_Push || Action == PSK_Pop
) && "Can only push / pop #pragma stack sentinels!") ?
void (0) : __assert_fail ("(Action == PSK_Push || Action == PSK_Pop) && \"Can only push / pop #pragma stack sentinels!\""
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 424, __extension__ __PRETTY_FUNCTION__))
424 "Can only push / pop #pragma stack sentinels!")(static_cast <bool> ((Action == PSK_Push || Action == PSK_Pop
) && "Can only push / pop #pragma stack sentinels!") ?
void (0) : __assert_fail ("(Action == PSK_Push || Action == PSK_Pop) && \"Can only push / pop #pragma stack sentinels!\""
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 424, __extension__ __PRETTY_FUNCTION__))
;
425 Act(CurrentPragmaLocation, Action, Label, CurrentValue);
426 }
427
428 // Constructors.
429 explicit PragmaStack(const ValueType &Default)
430 : DefaultValue(Default), CurrentValue(Default) {}
431
432 bool hasValue() const { return CurrentValue != DefaultValue; }
433
434 SmallVector<Slot, 2> Stack;
435 ValueType DefaultValue; // Value used for PSK_Reset action.
436 ValueType CurrentValue;
437 SourceLocation CurrentPragmaLocation;
438 };
439 // FIXME: We should serialize / deserialize these if they occur in a PCH (but
440 // we shouldn't do so if they're in a module).
441
442 /// \brief Whether to insert vtordisps prior to virtual bases in the Microsoft
443 /// C++ ABI. Possible values are 0, 1, and 2, which mean:
444 ///
445 /// 0: Suppress all vtordisps
446 /// 1: Insert vtordisps in the presence of vbase overrides and non-trivial
447 /// structors
448 /// 2: Always insert vtordisps to support RTTI on partially constructed
449 /// objects
450 PragmaStack<MSVtorDispAttr::Mode> VtorDispStack;
451 // #pragma pack.
452 // Sentinel to represent when the stack is set to mac68k alignment.
453 static const unsigned kMac68kAlignmentSentinel = ~0U;
454 PragmaStack<unsigned> PackStack;
455 // The current #pragma pack values and locations at each #include.
456 struct PackIncludeState {
457 unsigned CurrentValue;
458 SourceLocation CurrentPragmaLocation;
459 bool HasNonDefaultValue, ShouldWarnOnInclude;
460 };
461 SmallVector<PackIncludeState, 8> PackIncludeStack;
462 // Segment #pragmas.
463 PragmaStack<StringLiteral *> DataSegStack;
464 PragmaStack<StringLiteral *> BSSSegStack;
465 PragmaStack<StringLiteral *> ConstSegStack;
466 PragmaStack<StringLiteral *> CodeSegStack;
467
468 // RAII object to push / pop sentinel slots for all MS #pragma stacks.
469 // Actions should be performed only if we enter / exit a C++ method body.
470 class PragmaStackSentinelRAII {
471 public:
472 PragmaStackSentinelRAII(Sema &S, StringRef SlotLabel, bool ShouldAct);
473 ~PragmaStackSentinelRAII();
474
475 private:
476 Sema &S;
477 StringRef SlotLabel;
478 bool ShouldAct;
479 };
480
481 /// A mapping that describes the nullability we've seen in each header file.
482 FileNullabilityMap NullabilityMap;
483
484 /// Last section used with #pragma init_seg.
485 StringLiteral *CurInitSeg;
486 SourceLocation CurInitSegLoc;
487
488 /// VisContext - Manages the stack for \#pragma GCC visibility.
489 void *VisContext; // Really a "PragmaVisStack*"
490
491 /// \brief This represents the stack of attributes that were pushed by
492 /// \#pragma clang attribute.
493 struct PragmaAttributeEntry {
494 SourceLocation Loc;
495 AttributeList *Attribute;
496 SmallVector<attr::SubjectMatchRule, 4> MatchRules;
497 bool IsUsed;
498 };
499 SmallVector<PragmaAttributeEntry, 2> PragmaAttributeStack;
500
501 /// \brief The declaration that is currently receiving an attribute from the
502 /// #pragma attribute stack.
503 const Decl *PragmaAttributeCurrentTargetDecl;
504
505 /// \brief This represents the last location of a "#pragma clang optimize off"
506 /// directive if such a directive has not been closed by an "on" yet. If
507 /// optimizations are currently "on", this is set to an invalid location.
508 SourceLocation OptimizeOffPragmaLocation;
509
510 /// \brief Flag indicating if Sema is building a recovery call expression.
511 ///
512 /// This flag is used to avoid building recovery call expressions
513 /// if Sema is already doing so, which would cause infinite recursions.
514 bool IsBuildingRecoveryCallExpr;
515
516 /// Used to control the generation of ExprWithCleanups.
517 CleanupInfo Cleanup;
518
519 /// ExprCleanupObjects - This is the stack of objects requiring
520 /// cleanup that are created by the current full expression. The
521 /// element type here is ExprWithCleanups::Object.
522 SmallVector<BlockDecl*, 8> ExprCleanupObjects;
523
524 /// \brief Store a list of either DeclRefExprs or MemberExprs
525 /// that contain a reference to a variable (constant) that may or may not
526 /// be odr-used in this Expr, and we won't know until all lvalue-to-rvalue
527 /// and discarded value conversions have been applied to all subexpressions
528 /// of the enclosing full expression. This is cleared at the end of each
529 /// full expression.
530 llvm::SmallPtrSet<Expr*, 2> MaybeODRUseExprs;
531
532 /// \brief Stack containing information about each of the nested
533 /// function, block, and method scopes that are currently active.
534 ///
535 /// This array is never empty. Clients should ignore the first
536 /// element, which is used to cache a single FunctionScopeInfo
537 /// that's used to parse every top-level function.
538 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes;
539
540 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource,
541 &ExternalSemaSource::ReadExtVectorDecls, 2, 2>
542 ExtVectorDeclsType;
543
544 /// ExtVectorDecls - This is a list all the extended vector types. This allows
545 /// us to associate a raw vector type with one of the ext_vector type names.
546 /// This is only necessary for issuing pretty diagnostics.
547 ExtVectorDeclsType ExtVectorDecls;
548
549 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes.
550 std::unique_ptr<CXXFieldCollector> FieldCollector;
551
552 typedef llvm::SmallSetVector<const NamedDecl*, 16> NamedDeclSetType;
553
554 /// \brief Set containing all declared private fields that are not used.
555 NamedDeclSetType UnusedPrivateFields;
556
557 /// \brief Set containing all typedefs that are likely unused.
558 llvm::SmallSetVector<const TypedefNameDecl *, 4>
559 UnusedLocalTypedefNameCandidates;
560
561 /// \brief Delete-expressions to be analyzed at the end of translation unit
562 ///
563 /// This list contains class members, and locations of delete-expressions
564 /// that could not be proven as to whether they mismatch with new-expression
565 /// used in initializer of the field.
566 typedef std::pair<SourceLocation, bool> DeleteExprLoc;
567 typedef llvm::SmallVector<DeleteExprLoc, 4> DeleteLocs;
568 llvm::MapVector<FieldDecl *, DeleteLocs> DeleteExprs;
569
570 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy;
571
572 /// PureVirtualClassDiagSet - a set of class declarations which we have
573 /// emitted a list of pure virtual functions. Used to prevent emitting the
574 /// same list more than once.
575 std::unique_ptr<RecordDeclSetTy> PureVirtualClassDiagSet;
576
577 /// ParsingInitForAutoVars - a set of declarations with auto types for which
578 /// we are currently parsing the initializer.
579 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars;
580
581 /// \brief Look for a locally scoped extern "C" declaration by the given name.
582 NamedDecl *findLocallyScopedExternCDecl(DeclarationName Name);
583
584 typedef LazyVector<VarDecl *, ExternalSemaSource,
585 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2>
586 TentativeDefinitionsType;
587
588 /// \brief All the tentative definitions encountered in the TU.
589 TentativeDefinitionsType TentativeDefinitions;
590
591 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource,
592 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2>
593 UnusedFileScopedDeclsType;
594
595 /// \brief The set of file scoped decls seen so far that have not been used
596 /// and must warn if not used. Only contains the first declaration.
597 UnusedFileScopedDeclsType UnusedFileScopedDecls;
598
599 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource,
600 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2>
601 DelegatingCtorDeclsType;
602
603 /// \brief All the delegating constructors seen so far in the file, used for
604 /// cycle detection at the end of the TU.
605 DelegatingCtorDeclsType DelegatingCtorDecls;
606
607 /// \brief All the overriding functions seen during a class definition
608 /// that had their exception spec checks delayed, plus the overridden
609 /// function.
610 SmallVector<std::pair<const CXXMethodDecl*, const CXXMethodDecl*>, 2>
611 DelayedExceptionSpecChecks;
612
613 /// \brief All the members seen during a class definition which were both
614 /// explicitly defaulted and had explicitly-specified exception
615 /// specifications, along with the function type containing their
616 /// user-specified exception specification. Those exception specifications
617 /// were overridden with the default specifications, but we still need to
618 /// check whether they are compatible with the default specification, and
619 /// we can't do that until the nesting set of class definitions is complete.
620 SmallVector<std::pair<CXXMethodDecl*, const FunctionProtoType*>, 2>
621 DelayedDefaultedMemberExceptionSpecs;
622
623 typedef llvm::MapVector<const FunctionDecl *,
624 std::unique_ptr<LateParsedTemplate>>
625 LateParsedTemplateMapT;
626 LateParsedTemplateMapT LateParsedTemplateMap;
627
628 /// \brief Callback to the parser to parse templated functions when needed.
629 typedef void LateTemplateParserCB(void *P, LateParsedTemplate &LPT);
630 typedef void LateTemplateParserCleanupCB(void *P);
631 LateTemplateParserCB *LateTemplateParser;
632 LateTemplateParserCleanupCB *LateTemplateParserCleanup;
633 void *OpaqueParser;
634
635 void SetLateTemplateParser(LateTemplateParserCB *LTP,
636 LateTemplateParserCleanupCB *LTPCleanup,
637 void *P) {
638 LateTemplateParser = LTP;
639 LateTemplateParserCleanup = LTPCleanup;
640 OpaqueParser = P;
641 }
642
643 class DelayedDiagnostics;
644
645 class DelayedDiagnosticsState {
646 sema::DelayedDiagnosticPool *SavedPool;
647 friend class Sema::DelayedDiagnostics;
648 };
649 typedef DelayedDiagnosticsState ParsingDeclState;
650 typedef DelayedDiagnosticsState ProcessingContextState;
651
652 /// A class which encapsulates the logic for delaying diagnostics
653 /// during parsing and other processing.
654 class DelayedDiagnostics {
655 /// \brief The current pool of diagnostics into which delayed
656 /// diagnostics should go.
657 sema::DelayedDiagnosticPool *CurPool;
658
659 public:
660 DelayedDiagnostics() : CurPool(nullptr) {}
661
662 /// Adds a delayed diagnostic.
663 void add(const sema::DelayedDiagnostic &diag); // in DelayedDiagnostic.h
664
665 /// Determines whether diagnostics should be delayed.
666 bool shouldDelayDiagnostics() { return CurPool != nullptr; }
667
668 /// Returns the current delayed-diagnostics pool.
669 sema::DelayedDiagnosticPool *getCurrentPool() const {
670 return CurPool;
671 }
672
673 /// Enter a new scope. Access and deprecation diagnostics will be
674 /// collected in this pool.
675 DelayedDiagnosticsState push(sema::DelayedDiagnosticPool &pool) {
676 DelayedDiagnosticsState state;
677 state.SavedPool = CurPool;
678 CurPool = &pool;
679 return state;
680 }
681
682 /// Leave a delayed-diagnostic state that was previously pushed.
683 /// Do not emit any of the diagnostics. This is performed as part
684 /// of the bookkeeping of popping a pool "properly".
685 void popWithoutEmitting(DelayedDiagnosticsState state) {
686 CurPool = state.SavedPool;
687 }
688
689 /// Enter a new scope where access and deprecation diagnostics are
690 /// not delayed.
691 DelayedDiagnosticsState pushUndelayed() {
692 DelayedDiagnosticsState state;
693 state.SavedPool = CurPool;
694 CurPool = nullptr;
695 return state;
696 }
697
698 /// Undo a previous pushUndelayed().
699 void popUndelayed(DelayedDiagnosticsState state) {
700 assert(CurPool == nullptr)(static_cast <bool> (CurPool == nullptr) ? void (0) : __assert_fail
("CurPool == nullptr", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 700, __extension__ __PRETTY_FUNCTION__))
;
701 CurPool = state.SavedPool;
702 }
703 } DelayedDiagnostics;
704
705 /// A RAII object to temporarily push a declaration context.
706 class ContextRAII {
707 private:
708 Sema &S;
709 DeclContext *SavedContext;
710 ProcessingContextState SavedContextState;
711 QualType SavedCXXThisTypeOverride;
712
713 public:
714 ContextRAII(Sema &S, DeclContext *ContextToPush, bool NewThisContext = true)
715 : S(S), SavedContext(S.CurContext),
716 SavedContextState(S.DelayedDiagnostics.pushUndelayed()),
717 SavedCXXThisTypeOverride(S.CXXThisTypeOverride)
718 {
719 assert(ContextToPush && "pushing null context")(static_cast <bool> (ContextToPush && "pushing null context"
) ? void (0) : __assert_fail ("ContextToPush && \"pushing null context\""
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 719, __extension__ __PRETTY_FUNCTION__))
;
720 S.CurContext = ContextToPush;
721 if (NewThisContext)
722 S.CXXThisTypeOverride = QualType();
723 }
724
725 void pop() {
726 if (!SavedContext) return;
727 S.CurContext = SavedContext;
728 S.DelayedDiagnostics.popUndelayed(SavedContextState);
729 S.CXXThisTypeOverride = SavedCXXThisTypeOverride;
730 SavedContext = nullptr;
731 }
732
733 ~ContextRAII() {
734 pop();
735 }
736 };
737
738 /// \brief RAII object to handle the state changes required to synthesize
739 /// a function body.
740 class SynthesizedFunctionScope {
741 Sema &S;
742 Sema::ContextRAII SavedContext;
743 bool PushedCodeSynthesisContext = false;
744
745 public:
746 SynthesizedFunctionScope(Sema &S, DeclContext *DC)
747 : S(S), SavedContext(S, DC) {
748 S.PushFunctionScope();
749 S.PushExpressionEvaluationContext(
750 Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
751 if (auto *FD = dyn_cast<FunctionDecl>(DC))
752 FD->setWillHaveBody(true);
753 else
754 assert(isa<ObjCMethodDecl>(DC))(static_cast <bool> (isa<ObjCMethodDecl>(DC)) ? void
(0) : __assert_fail ("isa<ObjCMethodDecl>(DC)", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 754, __extension__ __PRETTY_FUNCTION__))
;
755 }
756
757 void addContextNote(SourceLocation UseLoc) {
758 assert(!PushedCodeSynthesisContext)(static_cast <bool> (!PushedCodeSynthesisContext) ? void
(0) : __assert_fail ("!PushedCodeSynthesisContext", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 758, __extension__ __PRETTY_FUNCTION__))
;
759
760 Sema::CodeSynthesisContext Ctx;
761 Ctx.Kind = Sema::CodeSynthesisContext::DefiningSynthesizedFunction;
762 Ctx.PointOfInstantiation = UseLoc;
763 Ctx.Entity = cast<Decl>(S.CurContext);
764 S.pushCodeSynthesisContext(Ctx);
765
766 PushedCodeSynthesisContext = true;
767 }
768
769 ~SynthesizedFunctionScope() {
770 if (PushedCodeSynthesisContext)
771 S.popCodeSynthesisContext();
772 if (auto *FD = dyn_cast<FunctionDecl>(S.CurContext))
773 FD->setWillHaveBody(false);
774 S.PopExpressionEvaluationContext();
775 S.PopFunctionScopeInfo();
776 }
777 };
778
779 /// WeakUndeclaredIdentifiers - Identifiers contained in
780 /// \#pragma weak before declared. rare. may alias another
781 /// identifier, declared or undeclared
782 llvm::MapVector<IdentifierInfo *, WeakInfo> WeakUndeclaredIdentifiers;
783
784 /// ExtnameUndeclaredIdentifiers - Identifiers contained in
785 /// \#pragma redefine_extname before declared. Used in Solaris system headers
786 /// to define functions that occur in multiple standards to call the version
787 /// in the currently selected standard.
788 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers;
789
790
791 /// \brief Load weak undeclared identifiers from the external source.
792 void LoadExternalWeakUndeclaredIdentifiers();
793
794 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by
795 /// \#pragma weak during processing of other Decls.
796 /// I couldn't figure out a clean way to generate these in-line, so
797 /// we store them here and handle separately -- which is a hack.
798 /// It would be best to refactor this.
799 SmallVector<Decl*,2> WeakTopLevelDecl;
800
801 IdentifierResolver IdResolver;
802
803 /// Translation Unit Scope - useful to Objective-C actions that need
804 /// to lookup file scope declarations in the "ordinary" C decl namespace.
805 /// For example, user-defined classes, built-in "id" type, etc.
806 Scope *TUScope;
807
808 /// \brief The C++ "std" namespace, where the standard library resides.
809 LazyDeclPtr StdNamespace;
810
811 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++
812 /// standard library.
813 LazyDeclPtr StdBadAlloc;
814
815 /// \brief The C++ "std::align_val_t" enum class, which is defined by the C++
816 /// standard library.
817 LazyDeclPtr StdAlignValT;
818
819 /// \brief The C++ "std::experimental" namespace, where the experimental parts
820 /// of the standard library resides.
821 NamespaceDecl *StdExperimentalNamespaceCache;
822
823 /// \brief The C++ "std::initializer_list" template, which is defined in
824 /// \<initializer_list>.
825 ClassTemplateDecl *StdInitializerList;
826
827 /// \brief The C++ "type_info" declaration, which is defined in \<typeinfo>.
828 RecordDecl *CXXTypeInfoDecl;
829
830 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files.
831 RecordDecl *MSVCGuidDecl;
832
833 /// \brief Caches identifiers/selectors for NSFoundation APIs.
834 std::unique_ptr<NSAPI> NSAPIObj;
835
836 /// \brief The declaration of the Objective-C NSNumber class.
837 ObjCInterfaceDecl *NSNumberDecl;
838
839 /// \brief The declaration of the Objective-C NSValue class.
840 ObjCInterfaceDecl *NSValueDecl;
841
842 /// \brief Pointer to NSNumber type (NSNumber *).
843 QualType NSNumberPointer;
844
845 /// \brief Pointer to NSValue type (NSValue *).
846 QualType NSValuePointer;
847
848 /// \brief The Objective-C NSNumber methods used to create NSNumber literals.
849 ObjCMethodDecl *NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods];
850
851 /// \brief The declaration of the Objective-C NSString class.
852 ObjCInterfaceDecl *NSStringDecl;
853
854 /// \brief Pointer to NSString type (NSString *).
855 QualType NSStringPointer;
856
857 /// \brief The declaration of the stringWithUTF8String: method.
858 ObjCMethodDecl *StringWithUTF8StringMethod;
859
860 /// \brief The declaration of the valueWithBytes:objCType: method.
861 ObjCMethodDecl *ValueWithBytesObjCTypeMethod;
862
863 /// \brief The declaration of the Objective-C NSArray class.
864 ObjCInterfaceDecl *NSArrayDecl;
865
866 /// \brief The declaration of the arrayWithObjects:count: method.
867 ObjCMethodDecl *ArrayWithObjectsMethod;
868
869 /// \brief The declaration of the Objective-C NSDictionary class.
870 ObjCInterfaceDecl *NSDictionaryDecl;
871
872 /// \brief The declaration of the dictionaryWithObjects:forKeys:count: method.
873 ObjCMethodDecl *DictionaryWithObjectsMethod;
874
875 /// \brief id<NSCopying> type.
876 QualType QIDNSCopying;
877
878 /// \brief will hold 'respondsToSelector:'
879 Selector RespondsToSelectorSel;
880
881 /// A flag to remember whether the implicit forms of operator new and delete
882 /// have been declared.
883 bool GlobalNewDeleteDeclared;
884
885 /// A flag to indicate that we're in a context that permits abstract
886 /// references to fields. This is really a
887 bool AllowAbstractFieldReference;
888
889 /// \brief Describes how the expressions currently being parsed are
890 /// evaluated at run-time, if at all.
891 enum class ExpressionEvaluationContext {
892 /// \brief The current expression and its subexpressions occur within an
893 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of
894 /// \c sizeof, where the type of the expression may be significant but
895 /// no code will be generated to evaluate the value of the expression at
896 /// run time.
897 Unevaluated,
898
899 /// \brief The current expression occurs within a braced-init-list within
900 /// an unevaluated operand. This is mostly like a regular unevaluated
901 /// context, except that we still instantiate constexpr functions that are
902 /// referenced here so that we can perform narrowing checks correctly.
903 UnevaluatedList,
904
905 /// \brief The current expression occurs within a discarded statement.
906 /// This behaves largely similarly to an unevaluated operand in preventing
907 /// definitions from being required, but not in other ways.
908 DiscardedStatement,
909
910 /// \brief The current expression occurs within an unevaluated
911 /// operand that unconditionally permits abstract references to
912 /// fields, such as a SIZE operator in MS-style inline assembly.
913 UnevaluatedAbstract,
914
915 /// \brief The current context is "potentially evaluated" in C++11 terms,
916 /// but the expression is evaluated at compile-time (like the values of
917 /// cases in a switch statement).
918 ConstantEvaluated,
919
920 /// \brief The current expression is potentially evaluated at run time,
921 /// which means that code may be generated to evaluate the value of the
922 /// expression at run time.
923 PotentiallyEvaluated,
924
925 /// \brief The current expression is potentially evaluated, but any
926 /// declarations referenced inside that expression are only used if
927 /// in fact the current expression is used.
928 ///
929 /// This value is used when parsing default function arguments, for which
930 /// we would like to provide diagnostics (e.g., passing non-POD arguments
931 /// through varargs) but do not want to mark declarations as "referenced"
932 /// until the default argument is used.
933 PotentiallyEvaluatedIfUsed
934 };
935
936 /// \brief Data structure used to record current or nested
937 /// expression evaluation contexts.
938 struct ExpressionEvaluationContextRecord {
939 /// \brief The expression evaluation context.
940 ExpressionEvaluationContext Context;
941
942 /// \brief Whether the enclosing context needed a cleanup.
943 CleanupInfo ParentCleanup;
944
945 /// \brief Whether we are in a decltype expression.
946 bool IsDecltype;
947
948 /// \brief The number of active cleanup objects when we entered
949 /// this expression evaluation context.
950 unsigned NumCleanupObjects;
951
952 /// \brief The number of typos encountered during this expression evaluation
953 /// context (i.e. the number of TypoExprs created).
954 unsigned NumTypos;
955
956 llvm::SmallPtrSet<Expr*, 2> SavedMaybeODRUseExprs;
957
958 /// \brief The lambdas that are present within this context, if it
959 /// is indeed an unevaluated context.
960 SmallVector<LambdaExpr *, 2> Lambdas;
961
962 /// \brief The declaration that provides context for lambda expressions
963 /// and block literals if the normal declaration context does not
964 /// suffice, e.g., in a default function argument.
965 Decl *ManglingContextDecl;
966
967 /// \brief The context information used to mangle lambda expressions
968 /// and block literals within this context.
969 ///
970 /// This mangling information is allocated lazily, since most contexts
971 /// do not have lambda expressions or block literals.
972 std::unique_ptr<MangleNumberingContext> MangleNumbering;
973
974 /// \brief If we are processing a decltype type, a set of call expressions
975 /// for which we have deferred checking the completeness of the return type.
976 SmallVector<CallExpr *, 8> DelayedDecltypeCalls;
977
978 /// \brief If we are processing a decltype type, a set of temporary binding
979 /// expressions for which we have deferred checking the destructor.
980 SmallVector<CXXBindTemporaryExpr *, 8> DelayedDecltypeBinds;
981
982 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context,
983 unsigned NumCleanupObjects,
984 CleanupInfo ParentCleanup,
985 Decl *ManglingContextDecl,
986 bool IsDecltype)
987 : Context(Context), ParentCleanup(ParentCleanup),
988 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects),
989 NumTypos(0),
990 ManglingContextDecl(ManglingContextDecl), MangleNumbering() { }
991
992 /// \brief Retrieve the mangling numbering context, used to consistently
993 /// number constructs like lambdas for mangling.
994 MangleNumberingContext &getMangleNumberingContext(ASTContext &Ctx);
995
996 bool isUnevaluated() const {
997 return Context == ExpressionEvaluationContext::Unevaluated ||
998 Context == ExpressionEvaluationContext::UnevaluatedAbstract ||
999 Context == ExpressionEvaluationContext::UnevaluatedList;
1000 }
1001 bool isConstantEvaluated() const {
1002 return Context == ExpressionEvaluationContext::ConstantEvaluated;
1003 }
1004 };
1005
1006 /// A stack of expression evaluation contexts.
1007 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts;
1008
1009 /// \brief Compute the mangling number context for a lambda expression or
1010 /// block literal.
1011 ///
1012 /// \param DC - The DeclContext containing the lambda expression or
1013 /// block literal.
1014 /// \param[out] ManglingContextDecl - Returns the ManglingContextDecl
1015 /// associated with the context, if relevant.
1016 MangleNumberingContext *getCurrentMangleNumberContext(
1017 const DeclContext *DC,
1018 Decl *&ManglingContextDecl);
1019
1020
1021 /// SpecialMemberOverloadResult - The overloading result for a special member
1022 /// function.
1023 ///
1024 /// This is basically a wrapper around PointerIntPair. The lowest bits of the
1025 /// integer are used to determine whether overload resolution succeeded.
1026 class SpecialMemberOverloadResult {
1027 public:
1028 enum Kind {
1029 NoMemberOrDeleted,
1030 Ambiguous,
1031 Success
1032 };
1033
1034 private:
1035 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair;
1036
1037 public:
1038 SpecialMemberOverloadResult() : Pair() {}
1039 SpecialMemberOverloadResult(CXXMethodDecl *MD)
1040 : Pair(MD, MD->isDeleted() ? NoMemberOrDeleted : Success) {}
1041
1042 CXXMethodDecl *getMethod() const { return Pair.getPointer(); }
1043 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); }
1044
1045 Kind getKind() const { return static_cast<Kind>(Pair.getInt()); }
1046 void setKind(Kind K) { Pair.setInt(K); }
1047 };
1048
1049 class SpecialMemberOverloadResultEntry
1050 : public llvm::FastFoldingSetNode,
1051 public SpecialMemberOverloadResult {
1052 public:
1053 SpecialMemberOverloadResultEntry(const llvm::FoldingSetNodeID &ID)
1054 : FastFoldingSetNode(ID)
1055 {}
1056 };
1057
1058 /// \brief A cache of special member function overload resolution results
1059 /// for C++ records.
1060 llvm::FoldingSet<SpecialMemberOverloadResultEntry> SpecialMemberCache;
1061
1062 /// \brief A cache of the flags available in enumerations with the flag_bits
1063 /// attribute.
1064 mutable llvm::DenseMap<const EnumDecl*, llvm::APInt> FlagBitsCache;
1065
1066 /// \brief The kind of translation unit we are processing.
1067 ///
1068 /// When we're processing a complete translation unit, Sema will perform
1069 /// end-of-translation-unit semantic tasks (such as creating
1070 /// initializers for tentative definitions in C) once parsing has
1071 /// completed. Modules and precompiled headers perform different kinds of
1072 /// checks.
1073 TranslationUnitKind TUKind;
1074
1075 llvm::BumpPtrAllocator BumpAlloc;
1076
1077 /// \brief The number of SFINAE diagnostics that have been trapped.
1078 unsigned NumSFINAEErrors;
1079
1080 typedef llvm::DenseMap<ParmVarDecl *, llvm::TinyPtrVector<ParmVarDecl *>>
1081 UnparsedDefaultArgInstantiationsMap;
1082
1083 /// \brief A mapping from parameters with unparsed default arguments to the
1084 /// set of instantiations of each parameter.
1085 ///
1086 /// This mapping is a temporary data structure used when parsing
1087 /// nested class templates or nested classes of class templates,
1088 /// where we might end up instantiating an inner class before the
1089 /// default arguments of its methods have been parsed.
1090 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations;
1091
1092 // Contains the locations of the beginning of unparsed default
1093 // argument locations.
1094 llvm::DenseMap<ParmVarDecl *, SourceLocation> UnparsedDefaultArgLocs;
1095
1096 /// UndefinedInternals - all the used, undefined objects which require a
1097 /// definition in this translation unit.
1098 llvm::MapVector<NamedDecl *, SourceLocation> UndefinedButUsed;
1099
1100 /// Determine if VD, which must be a variable or function, is an external
1101 /// symbol that nonetheless can't be referenced from outside this translation
1102 /// unit because its type has no linkage and it's not extern "C".
1103 bool isExternalWithNoLinkageType(ValueDecl *VD);
1104
1105 /// Obtain a sorted list of functions that are undefined but ODR-used.
1106 void getUndefinedButUsed(
1107 SmallVectorImpl<std::pair<NamedDecl *, SourceLocation> > &Undefined);
1108
1109 /// Retrieves list of suspicious delete-expressions that will be checked at
1110 /// the end of translation unit.
1111 const llvm::MapVector<FieldDecl *, DeleteLocs> &
1112 getMismatchingDeleteExpressions() const;
1113
1114 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods;
1115 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool;
1116
1117 /// Method Pool - allows efficient lookup when typechecking messages to "id".
1118 /// We need to maintain a list, since selectors can have differing signatures
1119 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1%
1120 /// of selectors are "overloaded").
1121 /// At the head of the list it is recorded whether there were 0, 1, or >= 2
1122 /// methods inside categories with a particular selector.
1123 GlobalMethodPool MethodPool;
1124
1125 /// Method selectors used in a \@selector expression. Used for implementation
1126 /// of -Wselector.
1127 llvm::MapVector<Selector, SourceLocation> ReferencedSelectors;
1128
1129 /// Kinds of C++ special members.
1130 enum CXXSpecialMember {
1131 CXXDefaultConstructor,
1132 CXXCopyConstructor,
1133 CXXMoveConstructor,
1134 CXXCopyAssignment,
1135 CXXMoveAssignment,
1136 CXXDestructor,
1137 CXXInvalid
1138 };
1139
1140 typedef llvm::PointerIntPair<CXXRecordDecl *, 3, CXXSpecialMember>
1141 SpecialMemberDecl;
1142
1143 /// The C++ special members which we are currently in the process of
1144 /// declaring. If this process recursively triggers the declaration of the
1145 /// same special member, we should act as if it is not yet declared.
1146 llvm::SmallPtrSet<SpecialMemberDecl, 4> SpecialMembersBeingDeclared;
1147
1148 /// The function definitions which were renamed as part of typo-correction
1149 /// to match their respective declarations. We want to keep track of them
1150 /// to ensure that we don't emit a "redefinition" error if we encounter a
1151 /// correctly named definition after the renamed definition.
1152 llvm::SmallPtrSet<const NamedDecl *, 4> TypoCorrectedFunctionDefinitions;
1153
1154 /// Stack of types that correspond to the parameter entities that are
1155 /// currently being copy-initialized. Can be empty.
1156 llvm::SmallVector<QualType, 4> CurrentParameterCopyTypes;
1157
1158 void ReadMethodPool(Selector Sel);
1159 void updateOutOfDateSelector(Selector Sel);
1160
1161 /// Private Helper predicate to check for 'self'.
1162 bool isSelfExpr(Expr *RExpr);
1163 bool isSelfExpr(Expr *RExpr, const ObjCMethodDecl *Method);
1164
1165 /// \brief Cause the active diagnostic on the DiagosticsEngine to be
1166 /// emitted. This is closely coupled to the SemaDiagnosticBuilder class and
1167 /// should not be used elsewhere.
1168 void EmitCurrentDiagnostic(unsigned DiagID);
1169
1170 /// Records and restores the FP_CONTRACT state on entry/exit of compound
1171 /// statements.
1172 class FPContractStateRAII {
1173 public:
1174 FPContractStateRAII(Sema &S) : S(S), OldFPFeaturesState(S.FPFeatures) {}
1175 ~FPContractStateRAII() { S.FPFeatures = OldFPFeaturesState; }
1176
1177 private:
1178 Sema& S;
1179 FPOptions OldFPFeaturesState;
1180 };
1181
1182 void addImplicitTypedef(StringRef Name, QualType T);
1183
1184public:
1185 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
1186 TranslationUnitKind TUKind = TU_Complete,
1187 CodeCompleteConsumer *CompletionConsumer = nullptr);
1188 ~Sema();
1189
1190 /// \brief Perform initialization that occurs after the parser has been
1191 /// initialized but before it parses anything.
1192 void Initialize();
1193
1194 const LangOptions &getLangOpts() const { return LangOpts; }
1195 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; }
1196 FPOptions &getFPOptions() { return FPFeatures; }
1197
1198 DiagnosticsEngine &getDiagnostics() const { return Diags; }
1199 SourceManager &getSourceManager() const { return SourceMgr; }
1200 Preprocessor &getPreprocessor() const { return PP; }
1201 ASTContext &getASTContext() const { return Context; }
1202 ASTConsumer &getASTConsumer() const { return Consumer; }
1203 ASTMutationListener *getASTMutationListener() const;
1204 ExternalSemaSource* getExternalSource() const { return ExternalSource; }
1205
1206 ///\brief Registers an external source. If an external source already exists,
1207 /// creates a multiplex external source and appends to it.
1208 ///
1209 ///\param[in] E - A non-null external sema source.
1210 ///
1211 void addExternalSource(ExternalSemaSource *E);
1212
1213 void PrintStats() const;
1214
1215 /// \brief Helper class that creates diagnostics with optional
1216 /// template instantiation stacks.
1217 ///
1218 /// This class provides a wrapper around the basic DiagnosticBuilder
1219 /// class that emits diagnostics. SemaDiagnosticBuilder is
1220 /// responsible for emitting the diagnostic (as DiagnosticBuilder
1221 /// does) and, if the diagnostic comes from inside a template
1222 /// instantiation, printing the template instantiation stack as
1223 /// well.
1224 class SemaDiagnosticBuilder : public DiagnosticBuilder {
1225 Sema &SemaRef;
1226 unsigned DiagID;
1227
1228 public:
1229 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID)
1230 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { }
1231
1232 // This is a cunning lie. DiagnosticBuilder actually performs move
1233 // construction in its copy constructor (but due to varied uses, it's not
1234 // possible to conveniently express this as actual move construction). So
1235 // the default copy ctor here is fine, because the base class disables the
1236 // source anyway, so the user-defined ~SemaDiagnosticBuilder is a safe no-op
1237 // in that case anwyay.
1238 SemaDiagnosticBuilder(const SemaDiagnosticBuilder&) = default;
1239
1240 ~SemaDiagnosticBuilder() {
1241 // If we aren't active, there is nothing to do.
1242 if (!isActive()) return;
1243
1244 // Otherwise, we need to emit the diagnostic. First flush the underlying
1245 // DiagnosticBuilder data, and clear the diagnostic builder itself so it
1246 // won't emit the diagnostic in its own destructor.
1247 //
1248 // This seems wasteful, in that as written the DiagnosticBuilder dtor will
1249 // do its own needless checks to see if the diagnostic needs to be
1250 // emitted. However, because we take care to ensure that the builder
1251 // objects never escape, a sufficiently smart compiler will be able to
1252 // eliminate that code.
1253 FlushCounts();
1254 Clear();
1255
1256 // Dispatch to Sema to emit the diagnostic.
1257 SemaRef.EmitCurrentDiagnostic(DiagID);
1258 }
1259
1260 /// Teach operator<< to produce an object of the correct type.
1261 template<typename T>
1262 friend const SemaDiagnosticBuilder &operator<<(
1263 const SemaDiagnosticBuilder &Diag, const T &Value) {
1264 const DiagnosticBuilder &BaseDiag = Diag;
1265 BaseDiag << Value;
1266 return Diag;
1267 }
1268 };
1269
1270 /// \brief Emit a diagnostic.
1271 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) {
1272 DiagnosticBuilder DB = Diags.Report(Loc, DiagID);
1273 return SemaDiagnosticBuilder(DB, *this, DiagID);
1274 }
1275
1276 /// \brief Emit a partial diagnostic.
1277 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD);
1278
1279 /// \brief Build a partial diagnostic.
1280 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h
1281
1282 bool findMacroSpelling(SourceLocation &loc, StringRef name);
1283
1284 /// \brief Get a string to suggest for zero-initialization of a type.
1285 std::string
1286 getFixItZeroInitializerForType(QualType T, SourceLocation Loc) const;
1287 std::string getFixItZeroLiteralForType(QualType T, SourceLocation Loc) const;
1288
1289 /// \brief Calls \c Lexer::getLocForEndOfToken()
1290 SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset = 0);
1291
1292 /// \brief Retrieve the module loader associated with the preprocessor.
1293 ModuleLoader &getModuleLoader() const;
1294
1295 void emitAndClearUnusedLocalTypedefWarnings();
1296
1297 void ActOnStartOfTranslationUnit();
1298 void ActOnEndOfTranslationUnit();
1299
1300 void CheckDelegatingCtorCycles();
1301
1302 Scope *getScopeForContext(DeclContext *Ctx);
1303
1304 void PushFunctionScope();
1305 void PushBlockScope(Scope *BlockScope, BlockDecl *Block);
1306 sema::LambdaScopeInfo *PushLambdaScope();
1307
1308 /// \brief This is used to inform Sema what the current TemplateParameterDepth
1309 /// is during Parsing. Currently it is used to pass on the depth
1310 /// when parsing generic lambda 'auto' parameters.
1311 void RecordParsingTemplateParameterDepth(unsigned Depth);
1312
1313 void PushCapturedRegionScope(Scope *RegionScope, CapturedDecl *CD,
1314 RecordDecl *RD,
1315 CapturedRegionKind K);
1316 void
1317 PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP = nullptr,
1318 const Decl *D = nullptr,
1319 const BlockExpr *blkExpr = nullptr);
1320
1321 sema::FunctionScopeInfo *getCurFunction() const {
1322 return FunctionScopes.back();
1323 }
1324
1325 sema::FunctionScopeInfo *getEnclosingFunction() const {
1326 if (FunctionScopes.empty())
1327 return nullptr;
1328
1329 for (int e = FunctionScopes.size()-1; e >= 0; --e) {
1330 if (isa<sema::BlockScopeInfo>(FunctionScopes[e]))
1331 continue;
1332 return FunctionScopes[e];
1333 }
1334 return nullptr;
1335 }
1336
1337 template <typename ExprT>
1338 void recordUseOfEvaluatedWeak(const ExprT *E, bool IsRead=true) {
1339 if (!isUnevaluatedContext())
1340 getCurFunction()->recordUseOfWeak(E, IsRead);
1341 }
1342
1343 void PushCompoundScope(bool IsStmtExpr);
1344 void PopCompoundScope();
1345
1346 sema::CompoundScopeInfo &getCurCompoundScope() const;
1347
1348 bool hasAnyUnrecoverableErrorsInThisFunction() const;
1349
1350 /// \brief Retrieve the current block, if any.
1351 sema::BlockScopeInfo *getCurBlock();
1352
1353 /// Retrieve the current lambda scope info, if any.
1354 /// \param IgnoreNonLambdaCapturingScope true if should find the top-most
1355 /// lambda scope info ignoring all inner capturing scopes that are not
1356 /// lambda scopes.
1357 sema::LambdaScopeInfo *
1358 getCurLambda(bool IgnoreNonLambdaCapturingScope = false);
1359
1360 /// \brief Retrieve the current generic lambda info, if any.
1361 sema::LambdaScopeInfo *getCurGenericLambda();
1362
1363 /// \brief Retrieve the current captured region, if any.
1364 sema::CapturedRegionScopeInfo *getCurCapturedRegion();
1365
1366 /// WeakTopLevelDeclDecls - access to \#pragma weak-generated Decls
1367 SmallVectorImpl<Decl *> &WeakTopLevelDecls() { return WeakTopLevelDecl; }
1368
1369 void ActOnComment(SourceRange Comment);
1370
1371 //===--------------------------------------------------------------------===//
1372 // Type Analysis / Processing: SemaType.cpp.
1373 //
1374
1375 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs,
1376 const DeclSpec *DS = nullptr);
1377 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVRA,
1378 const DeclSpec *DS = nullptr);
1379 QualType BuildPointerType(QualType T,
1380 SourceLocation Loc, DeclarationName Entity);
1381 QualType BuildReferenceType(QualType T, bool LValueRef,
1382 SourceLocation Loc, DeclarationName Entity);
1383 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM,
1384 Expr *ArraySize, unsigned Quals,
1385 SourceRange Brackets, DeclarationName Entity);
1386 QualType BuildExtVectorType(QualType T, Expr *ArraySize,
1387 SourceLocation AttrLoc);
1388 QualType BuildAddressSpaceAttr(QualType &T, Expr *AddrSpace,
1389 SourceLocation AttrLoc);
1390
1391 bool CheckFunctionReturnType(QualType T, SourceLocation Loc);
1392
1393 /// \brief Build a function type.
1394 ///
1395 /// This routine checks the function type according to C++ rules and
1396 /// under the assumption that the result type and parameter types have
1397 /// just been instantiated from a template. It therefore duplicates
1398 /// some of the behavior of GetTypeForDeclarator, but in a much
1399 /// simpler form that is only suitable for this narrow use case.
1400 ///
1401 /// \param T The return type of the function.
1402 ///
1403 /// \param ParamTypes The parameter types of the function. This array
1404 /// will be modified to account for adjustments to the types of the
1405 /// function parameters.
1406 ///
1407 /// \param Loc The location of the entity whose type involves this
1408 /// function type or, if there is no such entity, the location of the
1409 /// type that will have function type.
1410 ///
1411 /// \param Entity The name of the entity that involves the function
1412 /// type, if known.
1413 ///
1414 /// \param EPI Extra information about the function type. Usually this will
1415 /// be taken from an existing function with the same prototype.
1416 ///
1417 /// \returns A suitable function type, if there are no errors. The
1418 /// unqualified type will always be a FunctionProtoType.
1419 /// Otherwise, returns a NULL type.
1420 QualType BuildFunctionType(QualType T,
1421 MutableArrayRef<QualType> ParamTypes,
1422 SourceLocation Loc, DeclarationName Entity,
1423 const FunctionProtoType::ExtProtoInfo &EPI);
1424
1425 QualType BuildMemberPointerType(QualType T, QualType Class,
1426 SourceLocation Loc,
1427 DeclarationName Entity);
1428 QualType BuildBlockPointerType(QualType T,
1429 SourceLocation Loc, DeclarationName Entity);
1430 QualType BuildParenType(QualType T);
1431 QualType BuildAtomicType(QualType T, SourceLocation Loc);
1432 QualType BuildReadPipeType(QualType T,
1433 SourceLocation Loc);
1434 QualType BuildWritePipeType(QualType T,
1435 SourceLocation Loc);
1436
1437 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S);
1438 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy);
1439 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T,
1440 TypeSourceInfo *ReturnTypeInfo);
1441
1442 /// \brief Package the given type and TSI into a ParsedType.
1443 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo);
1444 DeclarationNameInfo GetNameForDeclarator(Declarator &D);
1445 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name);
1446 static QualType GetTypeFromParser(ParsedType Ty,
1447 TypeSourceInfo **TInfo = nullptr);
1448 CanThrowResult canThrow(const Expr *E);
1449 const FunctionProtoType *ResolveExceptionSpec(SourceLocation Loc,
1450 const FunctionProtoType *FPT);
1451 void UpdateExceptionSpec(FunctionDecl *FD,
1452 const FunctionProtoType::ExceptionSpecInfo &ESI);
1453 bool CheckSpecifiedExceptionType(QualType &T, SourceRange Range);
1454 bool CheckDistantExceptionSpec(QualType T);
1455 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New);
1456 bool CheckEquivalentExceptionSpec(
1457 const FunctionProtoType *Old, SourceLocation OldLoc,
1458 const FunctionProtoType *New, SourceLocation NewLoc);
1459 bool CheckEquivalentExceptionSpec(
1460 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID,
1461 const FunctionProtoType *Old, SourceLocation OldLoc,
1462 const FunctionProtoType *New, SourceLocation NewLoc);
1463 bool handlerCanCatch(QualType HandlerType, QualType ExceptionType);
1464 bool CheckExceptionSpecSubset(const PartialDiagnostic &DiagID,
1465 const PartialDiagnostic &NestedDiagID,
1466 const PartialDiagnostic &NoteID,
1467 const FunctionProtoType *Superset,
1468 SourceLocation SuperLoc,
1469 const FunctionProtoType *Subset,
1470 SourceLocation SubLoc);
1471 bool CheckParamExceptionSpec(const PartialDiagnostic &NestedDiagID,
1472 const PartialDiagnostic &NoteID,
1473 const FunctionProtoType *Target,
1474 SourceLocation TargetLoc,
1475 const FunctionProtoType *Source,
1476 SourceLocation SourceLoc);
1477
1478 TypeResult ActOnTypeName(Scope *S, Declarator &D);
1479
1480 /// \brief The parser has parsed the context-sensitive type 'instancetype'
1481 /// in an Objective-C message declaration. Return the appropriate type.
1482 ParsedType ActOnObjCInstanceType(SourceLocation Loc);
1483
1484 /// \brief Abstract class used to diagnose incomplete types.
1485 struct TypeDiagnoser {
1486 TypeDiagnoser() {}
1487
1488 virtual void diagnose(Sema &S, SourceLocation Loc, QualType T) = 0;
1489 virtual ~TypeDiagnoser() {}
1490 };
1491
1492 static int getPrintable(int I) { return I; }
1493 static unsigned getPrintable(unsigned I) { return I; }
1494 static bool getPrintable(bool B) { return B; }
1495 static const char * getPrintable(const char *S) { return S; }
1496 static StringRef getPrintable(StringRef S) { return S; }
1497 static const std::string &getPrintable(const std::string &S) { return S; }
1498 static const IdentifierInfo *getPrintable(const IdentifierInfo *II) {
1499 return II;
1500 }
1501 static DeclarationName getPrintable(DeclarationName N) { return N; }
1502 static QualType getPrintable(QualType T) { return T; }
1503 static SourceRange getPrintable(SourceRange R) { return R; }
1504 static SourceRange getPrintable(SourceLocation L) { return L; }
1505 static SourceRange getPrintable(const Expr *E) { return E->getSourceRange(); }
1506 static SourceRange getPrintable(TypeLoc TL) { return TL.getSourceRange();}
1507
1508 template <typename... Ts> class BoundTypeDiagnoser : public TypeDiagnoser {
1509 unsigned DiagID;
1510 std::tuple<const Ts &...> Args;
1511
1512 template <std::size_t... Is>
1513 void emit(const SemaDiagnosticBuilder &DB,
1514 llvm::index_sequence<Is...>) const {
1515 // Apply all tuple elements to the builder in order.
1516 bool Dummy[] = {false, (DB << getPrintable(std::get<Is>(Args)))...};
1517 (void)Dummy;
1518 }
1519
1520 public:
1521 BoundTypeDiagnoser(unsigned DiagID, const Ts &...Args)
1522 : TypeDiagnoser(), DiagID(DiagID), Args(Args...) {
1523 assert(DiagID != 0 && "no diagnostic for type diagnoser")(static_cast <bool> (DiagID != 0 && "no diagnostic for type diagnoser"
) ? void (0) : __assert_fail ("DiagID != 0 && \"no diagnostic for type diagnoser\""
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 1523, __extension__ __PRETTY_FUNCTION__))
;
1524 }
1525
1526 void diagnose(Sema &S, SourceLocation Loc, QualType T) override {
1527 const SemaDiagnosticBuilder &DB = S.Diag(Loc, DiagID);
1528 emit(DB, llvm::index_sequence_for<Ts...>());
1529 DB << T;
1530 }
1531 };
1532
1533private:
1534 bool RequireCompleteTypeImpl(SourceLocation Loc, QualType T,
1535 TypeDiagnoser *Diagnoser);
1536
1537 struct ModuleScope {
1538 clang::Module *Module = nullptr;
1539 bool ModuleInterface = false;
1540 VisibleModuleSet OuterVisibleModules;
1541 };
1542 /// The modules we're currently parsing.
1543 llvm::SmallVector<ModuleScope, 16> ModuleScopes;
1544
1545 /// Get the module whose scope we are currently within.
1546 Module *getCurrentModule() const {
1547 return ModuleScopes.empty() ? nullptr : ModuleScopes.back().Module;
1548 }
1549
1550 VisibleModuleSet VisibleModules;
1551
1552public:
1553 /// \brief Get the module owning an entity.
1554 Module *getOwningModule(Decl *Entity) { return Entity->getOwningModule(); }
1555
1556 /// \brief Make a merged definition of an existing hidden definition \p ND
1557 /// visible at the specified location.
1558 void makeMergedDefinitionVisible(NamedDecl *ND);
1559
1560 bool isModuleVisible(const Module *M) { return VisibleModules.isVisible(M); }
1561
1562 /// Determine whether a declaration is visible to name lookup.
1563 bool isVisible(const NamedDecl *D) {
1564 return !D->isHidden() || isVisibleSlow(D);
1565 }
1566
1567 /// Determine whether any declaration of an entity is visible.
1568 bool
1569 hasVisibleDeclaration(const NamedDecl *D,
1570 llvm::SmallVectorImpl<Module *> *Modules = nullptr) {
1571 return isVisible(D) || hasVisibleDeclarationSlow(D, Modules);
1572 }
1573 bool hasVisibleDeclarationSlow(const NamedDecl *D,
1574 llvm::SmallVectorImpl<Module *> *Modules);
1575
1576 bool hasVisibleMergedDefinition(NamedDecl *Def);
1577 bool hasMergedDefinitionInCurrentModule(NamedDecl *Def);
1578
1579 /// Determine if \p D and \p Suggested have a structurally compatible
1580 /// layout as described in C11 6.2.7/1.
1581 bool hasStructuralCompatLayout(Decl *D, Decl *Suggested);
1582
1583 /// Determine if \p D has a visible definition. If not, suggest a declaration
1584 /// that should be made visible to expose the definition.
1585 bool hasVisibleDefinition(NamedDecl *D, NamedDecl **Suggested,
1586 bool OnlyNeedComplete = false);
1587 bool hasVisibleDefinition(const NamedDecl *D) {
1588 NamedDecl *Hidden;
1589 return hasVisibleDefinition(const_cast<NamedDecl*>(D), &Hidden);
1590 }
1591
1592 /// Determine if the template parameter \p D has a visible default argument.
1593 bool
1594 hasVisibleDefaultArgument(const NamedDecl *D,
1595 llvm::SmallVectorImpl<Module *> *Modules = nullptr);
1596
1597 /// Determine if there is a visible declaration of \p D that is an explicit
1598 /// specialization declaration for a specialization of a template. (For a
1599 /// member specialization, use hasVisibleMemberSpecialization.)
1600 bool hasVisibleExplicitSpecialization(
1601 const NamedDecl *D, llvm::SmallVectorImpl<Module *> *Modules = nullptr);
1602
1603 /// Determine if there is a visible declaration of \p D that is a member
1604 /// specialization declaration (as opposed to an instantiated declaration).
1605 bool hasVisibleMemberSpecialization(
1606 const NamedDecl *D, llvm::SmallVectorImpl<Module *> *Modules = nullptr);
1607
1608 /// Determine if \p A and \p B are equivalent internal linkage declarations
1609 /// from different modules, and thus an ambiguity error can be downgraded to
1610 /// an extension warning.
1611 bool isEquivalentInternalLinkageDeclaration(const NamedDecl *A,
1612 const NamedDecl *B);
1613 void diagnoseEquivalentInternalLinkageDeclarations(
1614 SourceLocation Loc, const NamedDecl *D,
1615 ArrayRef<const NamedDecl *> Equiv);
1616
1617 bool isCompleteType(SourceLocation Loc, QualType T) {
1618 return !RequireCompleteTypeImpl(Loc, T, nullptr);
1619 }
1620 bool RequireCompleteType(SourceLocation Loc, QualType T,
1621 TypeDiagnoser &Diagnoser);
1622 bool RequireCompleteType(SourceLocation Loc, QualType T,
1623 unsigned DiagID);
1624
1625 template <typename... Ts>
1626 bool RequireCompleteType(SourceLocation Loc, QualType T, unsigned DiagID,
1627 const Ts &...Args) {
1628 BoundTypeDiagnoser<Ts...> Diagnoser(DiagID, Args...);
1629 return RequireCompleteType(Loc, T, Diagnoser);
1630 }
1631
1632 void completeExprArrayBound(Expr *E);
1633 bool RequireCompleteExprType(Expr *E, TypeDiagnoser &Diagnoser);
1634 bool RequireCompleteExprType(Expr *E, unsigned DiagID);
1635
1636 template <typename... Ts>
1637 bool RequireCompleteExprType(Expr *E, unsigned DiagID, const Ts &...Args) {
1638 BoundTypeDiagnoser<Ts...> Diagnoser(DiagID, Args...);
1639 return RequireCompleteExprType(E, Diagnoser);
1640 }
1641
1642 bool RequireLiteralType(SourceLocation Loc, QualType T,
1643 TypeDiagnoser &Diagnoser);
1644 bool RequireLiteralType(SourceLocation Loc, QualType T, unsigned DiagID);
1645
1646 template <typename... Ts>
1647 bool RequireLiteralType(SourceLocation Loc, QualType T, unsigned DiagID,
1648 const Ts &...Args) {
1649 BoundTypeDiagnoser<Ts...> Diagnoser(DiagID, Args...);
1650 return RequireLiteralType(Loc, T, Diagnoser);
1651 }
1652
1653 QualType getElaboratedType(ElaboratedTypeKeyword Keyword,
1654 const CXXScopeSpec &SS, QualType T);
1655
1656 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc);
1657 /// If AsUnevaluated is false, E is treated as though it were an evaluated
1658 /// context, such as when building a type for decltype(auto).
1659 QualType BuildDecltypeType(Expr *E, SourceLocation Loc,
1660 bool AsUnevaluated = true);
1661 QualType BuildUnaryTransformType(QualType BaseType,
1662 UnaryTransformType::UTTKind UKind,
1663 SourceLocation Loc);
1664
1665 //===--------------------------------------------------------------------===//
1666 // Symbol table / Decl tracking callbacks: SemaDecl.cpp.
1667 //
1668
1669 struct SkipBodyInfo {
1670 SkipBodyInfo()
1671 : ShouldSkip(false), CheckSameAsPrevious(false), Previous(nullptr),
1672 New(nullptr) {}
1673 bool ShouldSkip;
1674 bool CheckSameAsPrevious;
1675 NamedDecl *Previous;
1676 NamedDecl *New;
1677 };
1678
1679 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = nullptr);
1680
1681 void DiagnoseUseOfUnimplementedSelectors();
1682
1683 bool isSimpleTypeSpecifier(tok::TokenKind Kind) const;
1684
1685 ParsedType getTypeName(const IdentifierInfo &II, SourceLocation NameLoc,
1686 Scope *S, CXXScopeSpec *SS = nullptr,
1687 bool isClassName = false, bool HasTrailingDot = false,
1688 ParsedType ObjectType = nullptr,
1689 bool IsCtorOrDtorName = false,
1690 bool WantNontrivialTypeSourceInfo = false,
1691 bool IsClassTemplateDeductionContext = true,
1692 IdentifierInfo **CorrectedII = nullptr);
1693 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S);
1694 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S);
1695 void DiagnoseUnknownTypeName(IdentifierInfo *&II,
1696 SourceLocation IILoc,
1697 Scope *S,
1698 CXXScopeSpec *SS,
1699 ParsedType &SuggestedType,
1700 bool IsTemplateName = false);
1701
1702 /// Attempt to behave like MSVC in situations where lookup of an unqualified
1703 /// type name has failed in a dependent context. In these situations, we
1704 /// automatically form a DependentTypeName that will retry lookup in a related
1705 /// scope during instantiation.
1706 ParsedType ActOnMSVCUnknownTypeName(const IdentifierInfo &II,
1707 SourceLocation NameLoc,
1708 bool IsTemplateTypeArg);
1709
1710 /// \brief Describes the result of the name lookup and resolution performed
1711 /// by \c ClassifyName().
1712 enum NameClassificationKind {
1713 NC_Unknown,
1714 NC_Error,
1715 NC_Keyword,
1716 NC_Type,
1717 NC_Expression,
1718 NC_NestedNameSpecifier,
1719 NC_TypeTemplate,
1720 NC_VarTemplate,
1721 NC_FunctionTemplate
1722 };
1723
1724 class NameClassification {
1725 NameClassificationKind Kind;
1726 ExprResult Expr;
1727 TemplateName Template;
1728 ParsedType Type;
1729
1730 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {}
1731
1732 public:
1733 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {}
1734
1735 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {}
1736
1737 NameClassification(const IdentifierInfo *Keyword) : Kind(NC_Keyword) {}
1738
1739 static NameClassification Error() {
1740 return NameClassification(NC_Error);
1741 }
1742
1743 static NameClassification Unknown() {
1744 return NameClassification(NC_Unknown);
1745 }
1746
1747 static NameClassification NestedNameSpecifier() {
1748 return NameClassification(NC_NestedNameSpecifier);
1749 }
1750
1751 static NameClassification TypeTemplate(TemplateName Name) {
1752 NameClassification Result(NC_TypeTemplate);
1753 Result.Template = Name;
1754 return Result;
1755 }
1756
1757 static NameClassification VarTemplate(TemplateName Name) {
1758 NameClassification Result(NC_VarTemplate);
1759 Result.Template = Name;
1760 return Result;
1761 }
1762
1763 static NameClassification FunctionTemplate(TemplateName Name) {
1764 NameClassification Result(NC_FunctionTemplate);
1765 Result.Template = Name;
1766 return Result;
1767 }
1768
1769 NameClassificationKind getKind() const { return Kind; }
1770
1771 ParsedType getType() const {
1772 assert(Kind == NC_Type)(static_cast <bool> (Kind == NC_Type) ? void (0) : __assert_fail
("Kind == NC_Type", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 1772, __extension__ __PRETTY_FUNCTION__))
;
1773 return Type;
1774 }
1775
1776 ExprResult getExpression() const {
1777 assert(Kind == NC_Expression)(static_cast <bool> (Kind == NC_Expression) ? void (0) :
__assert_fail ("Kind == NC_Expression", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 1777, __extension__ __PRETTY_FUNCTION__))
;
1778 return Expr;
1779 }
1780
1781 TemplateName getTemplateName() const {
1782 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate ||(static_cast <bool> (Kind == NC_TypeTemplate || Kind ==
NC_FunctionTemplate || Kind == NC_VarTemplate) ? void (0) : __assert_fail
("Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate || Kind == NC_VarTemplate"
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 1783, __extension__ __PRETTY_FUNCTION__))
1783 Kind == NC_VarTemplate)(static_cast <bool> (Kind == NC_TypeTemplate || Kind ==
NC_FunctionTemplate || Kind == NC_VarTemplate) ? void (0) : __assert_fail
("Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate || Kind == NC_VarTemplate"
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 1783, __extension__ __PRETTY_FUNCTION__))
;
1784 return Template;
1785 }
1786
1787 TemplateNameKind getTemplateNameKind() const {
1788 switch (Kind) {
1789 case NC_TypeTemplate:
1790 return TNK_Type_template;
1791 case NC_FunctionTemplate:
1792 return TNK_Function_template;
1793 case NC_VarTemplate:
1794 return TNK_Var_template;
1795 default:
1796 llvm_unreachable("unsupported name classification.")::llvm::llvm_unreachable_internal("unsupported name classification."
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 1796)
;
1797 }
1798 }
1799 };
1800
1801 /// \brief Perform name lookup on the given name, classifying it based on
1802 /// the results of name lookup and the following token.
1803 ///
1804 /// This routine is used by the parser to resolve identifiers and help direct
1805 /// parsing. When the identifier cannot be found, this routine will attempt
1806 /// to correct the typo and classify based on the resulting name.
1807 ///
1808 /// \param S The scope in which we're performing name lookup.
1809 ///
1810 /// \param SS The nested-name-specifier that precedes the name.
1811 ///
1812 /// \param Name The identifier. If typo correction finds an alternative name,
1813 /// this pointer parameter will be updated accordingly.
1814 ///
1815 /// \param NameLoc The location of the identifier.
1816 ///
1817 /// \param NextToken The token following the identifier. Used to help
1818 /// disambiguate the name.
1819 ///
1820 /// \param IsAddressOfOperand True if this name is the operand of a unary
1821 /// address of ('&') expression, assuming it is classified as an
1822 /// expression.
1823 ///
1824 /// \param CCC The correction callback, if typo correction is desired.
1825 NameClassification
1826 ClassifyName(Scope *S, CXXScopeSpec &SS, IdentifierInfo *&Name,
1827 SourceLocation NameLoc, const Token &NextToken,
1828 bool IsAddressOfOperand,
1829 std::unique_ptr<CorrectionCandidateCallback> CCC = nullptr);
1830
1831 /// Describes the detailed kind of a template name. Used in diagnostics.
1832 enum class TemplateNameKindForDiagnostics {
1833 ClassTemplate,
1834 FunctionTemplate,
1835 VarTemplate,
1836 AliasTemplate,
1837 TemplateTemplateParam,
1838 DependentTemplate
1839 };
1840 TemplateNameKindForDiagnostics
1841 getTemplateNameKindForDiagnostics(TemplateName Name);
1842
1843 /// Determine whether it's plausible that E was intended to be a
1844 /// template-name.
1845 bool mightBeIntendedToBeTemplateName(ExprResult E) {
1846 if (!getLangOpts().CPlusPlus || E.isInvalid())
1847 return false;
1848 if (auto *DRE = dyn_cast<DeclRefExpr>(E.get()))
1849 return !DRE->hasExplicitTemplateArgs();
1850 if (auto *ME = dyn_cast<MemberExpr>(E.get()))
1851 return !ME->hasExplicitTemplateArgs();
1852 // Any additional cases recognized here should also be handled by
1853 // diagnoseExprIntendedAsTemplateName.
1854 return false;
1855 }
1856 void diagnoseExprIntendedAsTemplateName(Scope *S, ExprResult TemplateName,
1857 SourceLocation Less,
1858 SourceLocation Greater);
1859
1860 Decl *ActOnDeclarator(Scope *S, Declarator &D);
1861
1862 NamedDecl *HandleDeclarator(Scope *S, Declarator &D,
1863 MultiTemplateParamsArg TemplateParameterLists);
1864 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, Scope *S);
1865 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info);
1866 bool diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC,
1867 DeclarationName Name,
1868 SourceLocation Loc);
1869 void
1870 diagnoseIgnoredQualifiers(unsigned DiagID, unsigned Quals,
1871 SourceLocation FallbackLoc,
1872 SourceLocation ConstQualLoc = SourceLocation(),
1873 SourceLocation VolatileQualLoc = SourceLocation(),
1874 SourceLocation RestrictQualLoc = SourceLocation(),
1875 SourceLocation AtomicQualLoc = SourceLocation(),
1876 SourceLocation UnalignedQualLoc = SourceLocation());
1877
1878 static bool adjustContextForLocalExternDecl(DeclContext *&DC);
1879 void DiagnoseFunctionSpecifiers(const DeclSpec &DS);
1880 NamedDecl *getShadowedDeclaration(const TypedefNameDecl *D,
1881 const LookupResult &R);
1882 NamedDecl *getShadowedDeclaration(const VarDecl *D, const LookupResult &R);
1883 void CheckShadow(NamedDecl *D, NamedDecl *ShadowedDecl,
1884 const LookupResult &R);
1885 void CheckShadow(Scope *S, VarDecl *D);
1886
1887 /// Warn if 'E', which is an expression that is about to be modified, refers
1888 /// to a shadowing declaration.
1889 void CheckShadowingDeclModification(Expr *E, SourceLocation Loc);
1890
1891 void DiagnoseShadowingLambdaDecls(const sema::LambdaScopeInfo *LSI);
1892
1893private:
1894 /// Map of current shadowing declarations to shadowed declarations. Warn if
1895 /// it looks like the user is trying to modify the shadowing declaration.
1896 llvm::DenseMap<const NamedDecl *, const NamedDecl *> ShadowingDecls;
1897
1898public:
1899 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange);
1900 void handleTagNumbering(const TagDecl *Tag, Scope *TagScope);
1901 void setTagNameForLinkagePurposes(TagDecl *TagFromDeclSpec,
1902 TypedefNameDecl *NewTD);
1903 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D);
1904 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1905 TypeSourceInfo *TInfo,
1906 LookupResult &Previous);
1907 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D,
1908 LookupResult &Previous, bool &Redeclaration);
1909 NamedDecl *ActOnVariableDeclarator(Scope *S, Declarator &D, DeclContext *DC,
1910 TypeSourceInfo *TInfo,
1911 LookupResult &Previous,
1912 MultiTemplateParamsArg TemplateParamLists,
1913 bool &AddToScope,
1914 ArrayRef<BindingDecl *> Bindings = None);
1915 NamedDecl *
1916 ActOnDecompositionDeclarator(Scope *S, Declarator &D,
1917 MultiTemplateParamsArg TemplateParamLists);
1918 // Returns true if the variable declaration is a redeclaration
1919 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous);
1920 void CheckVariableDeclarationType(VarDecl *NewVD);
1921 bool DeduceVariableDeclarationType(VarDecl *VDecl, bool DirectInit,
1922 Expr *Init);
1923 void CheckCompleteVariableDeclaration(VarDecl *VD);
1924 void CheckCompleteDecompositionDeclaration(DecompositionDecl *DD);
1925 void MaybeSuggestAddingStaticToDecl(const FunctionDecl *D);
1926
1927 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC,
1928 TypeSourceInfo *TInfo,
1929 LookupResult &Previous,
1930 MultiTemplateParamsArg TemplateParamLists,
1931 bool &AddToScope);
1932 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD);
1933
1934 bool CheckConstexprFunctionDecl(const FunctionDecl *FD);
1935 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body);
1936
1937 void DiagnoseHiddenVirtualMethods(CXXMethodDecl *MD);
1938 void FindHiddenVirtualMethods(CXXMethodDecl *MD,
1939 SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods);
1940 void NoteHiddenVirtualMethods(CXXMethodDecl *MD,
1941 SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods);
1942 // Returns true if the function declaration is a redeclaration
1943 bool CheckFunctionDeclaration(Scope *S,
1944 FunctionDecl *NewFD, LookupResult &Previous,
1945 bool IsMemberSpecialization);
1946 bool shouldLinkDependentDeclWithPrevious(Decl *D, Decl *OldDecl);
1947 void CheckMain(FunctionDecl *FD, const DeclSpec &D);
1948 void CheckMSVCRTEntryPoint(FunctionDecl *FD);
1949 Decl *ActOnParamDeclarator(Scope *S, Declarator &D);
1950 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC,
1951 SourceLocation Loc,
1952 QualType T);
1953 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc,
1954 SourceLocation NameLoc, IdentifierInfo *Name,
1955 QualType T, TypeSourceInfo *TSInfo,
1956 StorageClass SC);
1957 void ActOnParamDefaultArgument(Decl *param,
1958 SourceLocation EqualLoc,
1959 Expr *defarg);
1960 void ActOnParamUnparsedDefaultArgument(Decl *param,
1961 SourceLocation EqualLoc,
1962 SourceLocation ArgLoc);
1963 void ActOnParamDefaultArgumentError(Decl *param, SourceLocation EqualLoc);
1964 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg,
1965 SourceLocation EqualLoc);
1966
1967 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit);
1968 void ActOnUninitializedDecl(Decl *dcl);
1969 void ActOnInitializerError(Decl *Dcl);
1970
1971 void ActOnPureSpecifier(Decl *D, SourceLocation PureSpecLoc);
1972 void ActOnCXXForRangeDecl(Decl *D);
1973 StmtResult ActOnCXXForRangeIdentifier(Scope *S, SourceLocation IdentLoc,
1974 IdentifierInfo *Ident,
1975 ParsedAttributes &Attrs,
1976 SourceLocation AttrEnd);
1977 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc);
1978 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc);
1979 void FinalizeDeclaration(Decl *D);
1980 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS,
1981 ArrayRef<Decl *> Group);
1982 DeclGroupPtrTy BuildDeclaratorGroup(MutableArrayRef<Decl *> Group);
1983
1984 /// Should be called on all declarations that might have attached
1985 /// documentation comments.
1986 void ActOnDocumentableDecl(Decl *D);
1987 void ActOnDocumentableDecls(ArrayRef<Decl *> Group);
1988
1989 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D,
1990 SourceLocation LocAfterDecls);
1991 void CheckForFunctionRedefinition(
1992 FunctionDecl *FD, const FunctionDecl *EffectiveDefinition = nullptr,
1993 SkipBodyInfo *SkipBody = nullptr);
1994 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D,
1995 MultiTemplateParamsArg TemplateParamLists,
1996 SkipBodyInfo *SkipBody = nullptr);
1997 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D,
1998 SkipBodyInfo *SkipBody = nullptr);
1999 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D);
2000 bool isObjCMethodDecl(Decl *D) {
2001 return D && isa<ObjCMethodDecl>(D);
2002 }
2003
2004 /// \brief Determine whether we can delay parsing the body of a function or
2005 /// function template until it is used, assuming we don't care about emitting
2006 /// code for that function.
2007 ///
2008 /// This will be \c false if we may need the body of the function in the
2009 /// middle of parsing an expression (where it's impractical to switch to
2010 /// parsing a different function), for instance, if it's constexpr in C++11
2011 /// or has an 'auto' return type in C++14. These cases are essentially bugs.
2012 bool canDelayFunctionBody(const Declarator &D);
2013
2014 /// \brief Determine whether we can skip parsing the body of a function
2015 /// definition, assuming we don't care about analyzing its body or emitting
2016 /// code for that function.
2017 ///
2018 /// This will be \c false only if we may need the body of the function in
2019 /// order to parse the rest of the program (for instance, if it is
2020 /// \c constexpr in C++11 or has an 'auto' return type in C++14).
2021 bool canSkipFunctionBody(Decl *D);
2022
2023 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope);
2024 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body);
2025 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation);
2026 Decl *ActOnSkippedFunctionBody(Decl *Decl);
2027 void ActOnFinishInlineFunctionDef(FunctionDecl *D);
2028
2029 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an
2030 /// attribute for which parsing is delayed.
2031 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs);
2032
2033 /// \brief Diagnose any unused parameters in the given sequence of
2034 /// ParmVarDecl pointers.
2035 void DiagnoseUnusedParameters(ArrayRef<ParmVarDecl *> Parameters);
2036
2037 /// \brief Diagnose whether the size of parameters or return value of a
2038 /// function or obj-c method definition is pass-by-value and larger than a
2039 /// specified threshold.
2040 void
2041 DiagnoseSizeOfParametersAndReturnValue(ArrayRef<ParmVarDecl *> Parameters,
2042 QualType ReturnTy, NamedDecl *D);
2043
2044 void DiagnoseInvalidJumps(Stmt *Body);
2045 Decl *ActOnFileScopeAsmDecl(Expr *expr,
2046 SourceLocation AsmLoc,
2047 SourceLocation RParenLoc);
2048
2049 /// \brief Handle a C++11 empty-declaration and attribute-declaration.
2050 Decl *ActOnEmptyDeclaration(Scope *S,
2051 AttributeList *AttrList,
2052 SourceLocation SemiLoc);
2053
2054 enum class ModuleDeclKind {
2055 Interface, ///< 'export module X;'
2056 Implementation, ///< 'module X;'
2057 Partition, ///< 'module partition X;'
2058 };
2059
2060 /// The parser has processed a module-declaration that begins the definition
2061 /// of a module interface or implementation.
2062 DeclGroupPtrTy ActOnModuleDecl(SourceLocation StartLoc,
2063 SourceLocation ModuleLoc, ModuleDeclKind MDK,
2064 ModuleIdPath Path);
2065
2066 /// \brief The parser has processed a module import declaration.
2067 ///
2068 /// \param AtLoc The location of the '@' symbol, if any.
2069 ///
2070 /// \param ImportLoc The location of the 'import' keyword.
2071 ///
2072 /// \param Path The module access path.
2073 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc,
2074 ModuleIdPath Path);
2075
2076 /// \brief The parser has processed a module import translated from a
2077 /// #include or similar preprocessing directive.
2078 void ActOnModuleInclude(SourceLocation DirectiveLoc, Module *Mod);
2079 void BuildModuleInclude(SourceLocation DirectiveLoc, Module *Mod);
2080
2081 /// \brief The parsed has entered a submodule.
2082 void ActOnModuleBegin(SourceLocation DirectiveLoc, Module *Mod);
2083 /// \brief The parser has left a submodule.
2084 void ActOnModuleEnd(SourceLocation DirectiveLoc, Module *Mod);
2085
2086 /// \brief Create an implicit import of the given module at the given
2087 /// source location, for error recovery, if possible.
2088 ///
2089 /// This routine is typically used when an entity found by name lookup
2090 /// is actually hidden within a module that we know about but the user
2091 /// has forgotten to import.
2092 void createImplicitModuleImportForErrorRecovery(SourceLocation Loc,
2093 Module *Mod);
2094
2095 /// Kinds of missing import. Note, the values of these enumerators correspond
2096 /// to %select values in diagnostics.
2097 enum class MissingImportKind {
2098 Declaration,
2099 Definition,
2100 DefaultArgument,
2101 ExplicitSpecialization,
2102 PartialSpecialization
2103 };
2104
2105 /// \brief Diagnose that the specified declaration needs to be visible but
2106 /// isn't, and suggest a module import that would resolve the problem.
2107 void diagnoseMissingImport(SourceLocation Loc, NamedDecl *Decl,
2108 MissingImportKind MIK, bool Recover = true);
2109 void diagnoseMissingImport(SourceLocation Loc, NamedDecl *Decl,
2110 SourceLocation DeclLoc, ArrayRef<Module *> Modules,
2111 MissingImportKind MIK, bool Recover);
2112
2113 Decl *ActOnStartExportDecl(Scope *S, SourceLocation ExportLoc,
2114 SourceLocation LBraceLoc);
2115 Decl *ActOnFinishExportDecl(Scope *S, Decl *ExportDecl,
2116 SourceLocation RBraceLoc);
2117
2118 /// \brief We've found a use of a templated declaration that would trigger an
2119 /// implicit instantiation. Check that any relevant explicit specializations
2120 /// and partial specializations are visible, and diagnose if not.
2121 void checkSpecializationVisibility(SourceLocation Loc, NamedDecl *Spec);
2122
2123 /// \brief We've found a use of a template specialization that would select a
2124 /// partial specialization. Check that the partial specialization is visible,
2125 /// and diagnose if not.
2126 void checkPartialSpecializationVisibility(SourceLocation Loc,
2127 NamedDecl *Spec);
2128
2129 /// \brief Retrieve a suitable printing policy.
2130 PrintingPolicy getPrintingPolicy() const {
2131 return getPrintingPolicy(Context, PP);
2132 }
2133
2134 /// \brief Retrieve a suitable printing policy.
2135 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx,
2136 const Preprocessor &PP);
2137
2138 /// Scope actions.
2139 void ActOnPopScope(SourceLocation Loc, Scope *S);
2140 void ActOnTranslationUnitScope(Scope *S);
2141
2142 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS,
2143 RecordDecl *&AnonRecord);
2144 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS,
2145 MultiTemplateParamsArg TemplateParams,
2146 bool IsExplicitInstantiation,
2147 RecordDecl *&AnonRecord);
2148
2149 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS,
2150 AccessSpecifier AS,
2151 RecordDecl *Record,
2152 const PrintingPolicy &Policy);
2153
2154 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS,
2155 RecordDecl *Record);
2156
2157 /// Common ways to introduce type names without a tag for use in diagnostics.
2158 /// Keep in sync with err_tag_reference_non_tag.
2159 enum NonTagKind {
2160 NTK_NonStruct,
2161 NTK_NonClass,
2162 NTK_NonUnion,
2163 NTK_NonEnum,
2164 NTK_Typedef,
2165 NTK_TypeAlias,
2166 NTK_Template,
2167 NTK_TypeAliasTemplate,
2168 NTK_TemplateTemplateArgument,
2169 };
2170
2171 /// Given a non-tag type declaration, returns an enum useful for indicating
2172 /// what kind of non-tag type this is.
2173 NonTagKind getNonTagTypeDeclKind(const Decl *D, TagTypeKind TTK);
2174
2175 bool isAcceptableTagRedeclaration(const TagDecl *Previous,
2176 TagTypeKind NewTag, bool isDefinition,
2177 SourceLocation NewTagLoc,
2178 const IdentifierInfo *Name);
2179
2180 enum TagUseKind {
2181 TUK_Reference, // Reference to a tag: 'struct foo *X;'
2182 TUK_Declaration, // Fwd decl of a tag: 'struct foo;'
2183 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;'
2184 TUK_Friend // Friend declaration: 'friend struct foo;'
2185 };
2186
2187 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK,
2188 SourceLocation KWLoc, CXXScopeSpec &SS, IdentifierInfo *Name,
2189 SourceLocation NameLoc, AttributeList *Attr,
2190 AccessSpecifier AS, SourceLocation ModulePrivateLoc,
2191 MultiTemplateParamsArg TemplateParameterLists, bool &OwnedDecl,
2192 bool &IsDependent, SourceLocation ScopedEnumKWLoc,
2193 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType,
2194 bool IsTypeSpecifier, bool IsTemplateParamOrArg,
2195 SkipBodyInfo *SkipBody = nullptr);
2196
2197 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc,
2198 unsigned TagSpec, SourceLocation TagLoc,
2199 CXXScopeSpec &SS,
2200 IdentifierInfo *Name, SourceLocation NameLoc,
2201 AttributeList *Attr,
2202 MultiTemplateParamsArg TempParamLists);
2203
2204 TypeResult ActOnDependentTag(Scope *S,
2205 unsigned TagSpec,
2206 TagUseKind TUK,
2207 const CXXScopeSpec &SS,
2208 IdentifierInfo *Name,
2209 SourceLocation TagLoc,
2210 SourceLocation NameLoc);
2211
2212 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart,
2213 IdentifierInfo *ClassName,
2214 SmallVectorImpl<Decl *> &Decls);
2215 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart,
2216 Declarator &D, Expr *BitfieldWidth);
2217
2218 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart,
2219 Declarator &D, Expr *BitfieldWidth,
2220 InClassInitStyle InitStyle,
2221 AccessSpecifier AS);
2222 MSPropertyDecl *HandleMSProperty(Scope *S, RecordDecl *TagD,
2223 SourceLocation DeclStart,
2224 Declarator &D, Expr *BitfieldWidth,
2225 InClassInitStyle InitStyle,
2226 AccessSpecifier AS,
2227 AttributeList *MSPropertyAttr);
2228
2229 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T,
2230 TypeSourceInfo *TInfo,
2231 RecordDecl *Record, SourceLocation Loc,
2232 bool Mutable, Expr *BitfieldWidth,
2233 InClassInitStyle InitStyle,
2234 SourceLocation TSSL,
2235 AccessSpecifier AS, NamedDecl *PrevDecl,
2236 Declarator *D = nullptr);
2237
2238 bool CheckNontrivialField(FieldDecl *FD);
2239 void DiagnoseNontrivial(const CXXRecordDecl *Record, CXXSpecialMember CSM);
2240
2241 enum TrivialABIHandling {
2242 /// The triviality of a method unaffected by "trivial_abi".
2243 TAH_IgnoreTrivialABI,
2244
2245 /// The triviality of a method affected by "trivial_abi".
2246 TAH_ConsiderTrivialABI
2247 };
2248
2249 bool SpecialMemberIsTrivial(CXXMethodDecl *MD, CXXSpecialMember CSM,
2250 TrivialABIHandling TAH = TAH_IgnoreTrivialABI,
2251 bool Diagnose = false);
2252 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD);
2253 void ActOnLastBitfield(SourceLocation DeclStart,
2254 SmallVectorImpl<Decl *> &AllIvarDecls);
2255 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart,
2256 Declarator &D, Expr *BitfieldWidth,
2257 tok::ObjCKeywordKind visibility);
2258
2259 // This is used for both record definitions and ObjC interface declarations.
2260 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl,
2261 ArrayRef<Decl *> Fields,
2262 SourceLocation LBrac, SourceLocation RBrac,
2263 AttributeList *AttrList);
2264
2265 /// ActOnTagStartDefinition - Invoked when we have entered the
2266 /// scope of a tag's definition (e.g., for an enumeration, class,
2267 /// struct, or union).
2268 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl);
2269
2270 /// Perform ODR-like check for C/ObjC when merging tag types from modules.
2271 /// Differently from C++, actually parse the body and reject / error out
2272 /// in case of a structural mismatch.
2273 bool ActOnDuplicateDefinition(DeclSpec &DS, Decl *Prev,
2274 SkipBodyInfo &SkipBody);
2275
2276 typedef void *SkippedDefinitionContext;
2277
2278 /// \brief Invoked when we enter a tag definition that we're skipping.
2279 SkippedDefinitionContext ActOnTagStartSkippedDefinition(Scope *S, Decl *TD);
2280
2281 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl);
2282
2283 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a
2284 /// C++ record definition's base-specifiers clause and are starting its
2285 /// member declarations.
2286 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl,
2287 SourceLocation FinalLoc,
2288 bool IsFinalSpelledSealed,
2289 SourceLocation LBraceLoc);
2290
2291 /// ActOnTagFinishDefinition - Invoked once we have finished parsing
2292 /// the definition of a tag (enumeration, class, struct, or union).
2293 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl,
2294 SourceRange BraceRange);
2295
2296 void ActOnTagFinishSkippedDefinition(SkippedDefinitionContext Context);
2297
2298 void ActOnObjCContainerFinishDefinition();
2299
2300 /// \brief Invoked when we must temporarily exit the objective-c container
2301 /// scope for parsing/looking-up C constructs.
2302 ///
2303 /// Must be followed by a call to \see ActOnObjCReenterContainerContext
2304 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC);
2305 void ActOnObjCReenterContainerContext(DeclContext *DC);
2306
2307 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable
2308 /// error parsing the definition of a tag.
2309 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl);
2310
2311 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum,
2312 EnumConstantDecl *LastEnumConst,
2313 SourceLocation IdLoc,
2314 IdentifierInfo *Id,
2315 Expr *val);
2316 bool CheckEnumUnderlyingType(TypeSourceInfo *TI);
2317 bool CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped,
2318 QualType EnumUnderlyingTy, bool IsFixed,
2319 const EnumDecl *Prev);
2320
2321 /// Determine whether the body of an anonymous enumeration should be skipped.
2322 /// \param II The name of the first enumerator.
2323 SkipBodyInfo shouldSkipAnonEnumBody(Scope *S, IdentifierInfo *II,
2324 SourceLocation IILoc);
2325
2326 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant,
2327 SourceLocation IdLoc, IdentifierInfo *Id,
2328 AttributeList *Attrs, SourceLocation EqualLoc,
2329 Expr *Val);
2330 void ActOnEnumBody(SourceLocation EnumLoc, SourceRange BraceRange,
2331 Decl *EnumDecl,
2332 ArrayRef<Decl *> Elements,
2333 Scope *S, AttributeList *Attr);
2334
2335 DeclContext *getContainingDC(DeclContext *DC);
2336
2337 /// Set the current declaration context until it gets popped.
2338 void PushDeclContext(Scope *S, DeclContext *DC);
2339 void PopDeclContext();
2340
2341 /// EnterDeclaratorContext - Used when we must lookup names in the context
2342 /// of a declarator's nested name specifier.
2343 void EnterDeclaratorContext(Scope *S, DeclContext *DC);
2344 void ExitDeclaratorContext(Scope *S);
2345
2346 /// Push the parameters of D, which must be a function, into scope.
2347 void ActOnReenterFunctionContext(Scope* S, Decl* D);
2348 void ActOnExitFunctionContext();
2349
2350 DeclContext *getFunctionLevelDeclContext();
2351
2352 /// getCurFunctionDecl - If inside of a function body, this returns a pointer
2353 /// to the function decl for the function being parsed. If we're currently
2354 /// in a 'block', this returns the containing context.
2355 FunctionDecl *getCurFunctionDecl();
2356
2357 /// getCurMethodDecl - If inside of a method body, this returns a pointer to
2358 /// the method decl for the method being parsed. If we're currently
2359 /// in a 'block', this returns the containing context.
2360 ObjCMethodDecl *getCurMethodDecl();
2361
2362 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method
2363 /// or C function we're in, otherwise return null. If we're currently
2364 /// in a 'block', this returns the containing context.
2365 NamedDecl *getCurFunctionOrMethodDecl();
2366
2367 /// Add this decl to the scope shadowed decl chains.
2368 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true);
2369
2370 /// \brief Make the given externally-produced declaration visible at the
2371 /// top level scope.
2372 ///
2373 /// \param D The externally-produced declaration to push.
2374 ///
2375 /// \param Name The name of the externally-produced declaration.
2376 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name);
2377
2378 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true
2379 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns
2380 /// true if 'D' belongs to the given declaration context.
2381 ///
2382 /// \param AllowInlineNamespace If \c true, allow the declaration to be in the
2383 /// enclosing namespace set of the context, rather than contained
2384 /// directly within it.
2385 bool isDeclInScope(NamedDecl *D, DeclContext *Ctx, Scope *S = nullptr,
2386 bool AllowInlineNamespace = false);
2387
2388 /// Finds the scope corresponding to the given decl context, if it
2389 /// happens to be an enclosing scope. Otherwise return NULL.
2390 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC);
2391
2392 /// Subroutines of ActOnDeclarator().
2393 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T,
2394 TypeSourceInfo *TInfo);
2395 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New);
2396
2397 /// \brief Describes the kind of merge to perform for availability
2398 /// attributes (including "deprecated", "unavailable", and "availability").
2399 enum AvailabilityMergeKind {
2400 /// \brief Don't merge availability attributes at all.
2401 AMK_None,
2402 /// \brief Merge availability attributes for a redeclaration, which requires
2403 /// an exact match.
2404 AMK_Redeclaration,
2405 /// \brief Merge availability attributes for an override, which requires
2406 /// an exact match or a weakening of constraints.
2407 AMK_Override,
2408 /// \brief Merge availability attributes for an implementation of
2409 /// a protocol requirement.
2410 AMK_ProtocolImplementation,
2411 };
2412
2413 /// Attribute merging methods. Return true if a new attribute was added.
2414 AvailabilityAttr *mergeAvailabilityAttr(NamedDecl *D, SourceRange Range,
2415 IdentifierInfo *Platform,
2416 bool Implicit,
2417 VersionTuple Introduced,
2418 VersionTuple Deprecated,
2419 VersionTuple Obsoleted,
2420 bool IsUnavailable,
2421 StringRef Message,
2422 bool IsStrict, StringRef Replacement,
2423 AvailabilityMergeKind AMK,
2424 unsigned AttrSpellingListIndex);
2425 TypeVisibilityAttr *mergeTypeVisibilityAttr(Decl *D, SourceRange Range,
2426 TypeVisibilityAttr::VisibilityType Vis,
2427 unsigned AttrSpellingListIndex);
2428 VisibilityAttr *mergeVisibilityAttr(Decl *D, SourceRange Range,
2429 VisibilityAttr::VisibilityType Vis,
2430 unsigned AttrSpellingListIndex);
2431 UuidAttr *mergeUuidAttr(Decl *D, SourceRange Range,
2432 unsigned AttrSpellingListIndex, StringRef Uuid);
2433 DLLImportAttr *mergeDLLImportAttr(Decl *D, SourceRange Range,
2434 unsigned AttrSpellingListIndex);
2435 DLLExportAttr *mergeDLLExportAttr(Decl *D, SourceRange Range,
2436 unsigned AttrSpellingListIndex);
2437 MSInheritanceAttr *
2438 mergeMSInheritanceAttr(Decl *D, SourceRange Range, bool BestCase,
2439 unsigned AttrSpellingListIndex,
2440 MSInheritanceAttr::Spelling SemanticSpelling);
2441 FormatAttr *mergeFormatAttr(Decl *D, SourceRange Range,
2442 IdentifierInfo *Format, int FormatIdx,
2443 int FirstArg, unsigned AttrSpellingListIndex);
2444 SectionAttr *mergeSectionAttr(Decl *D, SourceRange Range, StringRef Name,
2445 unsigned AttrSpellingListIndex);
2446 AlwaysInlineAttr *mergeAlwaysInlineAttr(Decl *D, SourceRange Range,
2447 IdentifierInfo *Ident,
2448 unsigned AttrSpellingListIndex);
2449 MinSizeAttr *mergeMinSizeAttr(Decl *D, SourceRange Range,
2450 unsigned AttrSpellingListIndex);
2451 OptimizeNoneAttr *mergeOptimizeNoneAttr(Decl *D, SourceRange Range,
2452 unsigned AttrSpellingListIndex);
2453 InternalLinkageAttr *mergeInternalLinkageAttr(Decl *D, SourceRange Range,
2454 IdentifierInfo *Ident,
2455 unsigned AttrSpellingListIndex);
2456 CommonAttr *mergeCommonAttr(Decl *D, SourceRange Range, IdentifierInfo *Ident,
2457 unsigned AttrSpellingListIndex);
2458
2459 void mergeDeclAttributes(NamedDecl *New, Decl *Old,
2460 AvailabilityMergeKind AMK = AMK_Redeclaration);
2461 void MergeTypedefNameDecl(Scope *S, TypedefNameDecl *New,
2462 LookupResult &OldDecls);
2463 bool MergeFunctionDecl(FunctionDecl *New, NamedDecl *&Old, Scope *S,
2464 bool MergeTypeWithOld);
2465 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old,
2466 Scope *S, bool MergeTypeWithOld);
2467 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old);
2468 void MergeVarDecl(VarDecl *New, LookupResult &Previous);
2469 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old, bool MergeTypeWithOld);
2470 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old);
2471 bool checkVarDeclRedefinition(VarDecl *OldDefn, VarDecl *NewDefn);
2472 void notePreviousDefinition(const NamedDecl *Old, SourceLocation New);
2473 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S);
2474
2475 // AssignmentAction - This is used by all the assignment diagnostic functions
2476 // to represent what is actually causing the operation
2477 enum AssignmentAction {
2478 AA_Assigning,
2479 AA_Passing,
2480 AA_Returning,
2481 AA_Converting,
2482 AA_Initializing,
2483 AA_Sending,
2484 AA_Casting,
2485 AA_Passing_CFAudited
2486 };
2487
2488 /// C++ Overloading.
2489 enum OverloadKind {
2490 /// This is a legitimate overload: the existing declarations are
2491 /// functions or function templates with different signatures.
2492 Ovl_Overload,
2493
2494 /// This is not an overload because the signature exactly matches
2495 /// an existing declaration.
2496 Ovl_Match,
2497
2498 /// This is not an overload because the lookup results contain a
2499 /// non-function.
2500 Ovl_NonFunction
2501 };
2502 OverloadKind CheckOverload(Scope *S,
2503 FunctionDecl *New,
2504 const LookupResult &OldDecls,
2505 NamedDecl *&OldDecl,
2506 bool IsForUsingDecl);
2507 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl,
2508 bool ConsiderCudaAttrs = true);
2509
2510 /// \brief Checks availability of the function depending on the current
2511 /// function context.Inside an unavailable function,unavailability is ignored.
2512 ///
2513 /// \returns true if \p FD is unavailable and current context is inside
2514 /// an available function, false otherwise.
2515 bool isFunctionConsideredUnavailable(FunctionDecl *FD);
2516
2517 ImplicitConversionSequence
2518 TryImplicitConversion(Expr *From, QualType ToType,
2519 bool SuppressUserConversions,
2520 bool AllowExplicit,
2521 bool InOverloadResolution,
2522 bool CStyle,
2523 bool AllowObjCWritebackConversion);
2524
2525 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType);
2526 bool IsFloatingPointPromotion(QualType FromType, QualType ToType);
2527 bool IsComplexPromotion(QualType FromType, QualType ToType);
2528 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType,
2529 bool InOverloadResolution,
2530 QualType& ConvertedType, bool &IncompatibleObjC);
2531 bool isObjCPointerConversion(QualType FromType, QualType ToType,
2532 QualType& ConvertedType, bool &IncompatibleObjC);
2533 bool isObjCWritebackConversion(QualType FromType, QualType ToType,
2534 QualType &ConvertedType);
2535 bool IsBlockPointerConversion(QualType FromType, QualType ToType,
2536 QualType& ConvertedType);
2537 bool FunctionParamTypesAreEqual(const FunctionProtoType *OldType,
2538 const FunctionProtoType *NewType,
2539 unsigned *ArgPos = nullptr);
2540 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag,
2541 QualType FromType, QualType ToType);
2542
2543 void maybeExtendBlockObject(ExprResult &E);
2544 CastKind PrepareCastToObjCObjectPointer(ExprResult &E);
2545 bool CheckPointerConversion(Expr *From, QualType ToType,
2546 CastKind &Kind,
2547 CXXCastPath& BasePath,
2548 bool IgnoreBaseAccess,
2549 bool Diagnose = true);
2550 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType,
2551 bool InOverloadResolution,
2552 QualType &ConvertedType);
2553 bool CheckMemberPointerConversion(Expr *From, QualType ToType,
2554 CastKind &Kind,
2555 CXXCastPath &BasePath,
2556 bool IgnoreBaseAccess);
2557 bool IsQualificationConversion(QualType FromType, QualType ToType,
2558 bool CStyle, bool &ObjCLifetimeConversion);
2559 bool IsFunctionConversion(QualType FromType, QualType ToType,
2560 QualType &ResultTy);
2561 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType);
2562 bool isSameOrCompatibleFunctionType(CanQualType Param, CanQualType Arg);
2563
2564 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity,
2565 const VarDecl *NRVOCandidate,
2566 QualType ResultType,
2567 Expr *Value,
2568 bool AllowNRVO = true);
2569
2570 bool CanPerformCopyInitialization(const InitializedEntity &Entity,
2571 ExprResult Init);
2572 ExprResult PerformCopyInitialization(const InitializedEntity &Entity,
2573 SourceLocation EqualLoc,
2574 ExprResult Init,
2575 bool TopLevelOfInitList = false,
2576 bool AllowExplicit = false);
2577 ExprResult PerformObjectArgumentInitialization(Expr *From,
2578 NestedNameSpecifier *Qualifier,
2579 NamedDecl *FoundDecl,
2580 CXXMethodDecl *Method);
2581
2582 ExprResult PerformContextuallyConvertToBool(Expr *From);
2583 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From);
2584
2585 /// Contexts in which a converted constant expression is required.
2586 enum CCEKind {
2587 CCEK_CaseValue, ///< Expression in a case label.
2588 CCEK_Enumerator, ///< Enumerator value with fixed underlying type.
2589 CCEK_TemplateArg, ///< Value of a non-type template parameter.
2590 CCEK_NewExpr, ///< Constant expression in a noptr-new-declarator.
2591 CCEK_ConstexprIf ///< Condition in a constexpr if statement.
2592 };
2593 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T,
2594 llvm::APSInt &Value, CCEKind CCE);
2595 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T,
2596 APValue &Value, CCEKind CCE);
2597
2598 /// \brief Abstract base class used to perform a contextual implicit
2599 /// conversion from an expression to any type passing a filter.
2600 class ContextualImplicitConverter {
2601 public:
2602 bool Suppress;
2603 bool SuppressConversion;
2604
2605 ContextualImplicitConverter(bool Suppress = false,
2606 bool SuppressConversion = false)
2607 : Suppress(Suppress), SuppressConversion(SuppressConversion) {}
2608
2609 /// \brief Determine whether the specified type is a valid destination type
2610 /// for this conversion.
2611 virtual bool match(QualType T) = 0;
2612
2613 /// \brief Emits a diagnostic complaining that the expression does not have
2614 /// integral or enumeration type.
2615 virtual SemaDiagnosticBuilder
2616 diagnoseNoMatch(Sema &S, SourceLocation Loc, QualType T) = 0;
2617
2618 /// \brief Emits a diagnostic when the expression has incomplete class type.
2619 virtual SemaDiagnosticBuilder
2620 diagnoseIncomplete(Sema &S, SourceLocation Loc, QualType T) = 0;
2621
2622 /// \brief Emits a diagnostic when the only matching conversion function
2623 /// is explicit.
2624 virtual SemaDiagnosticBuilder diagnoseExplicitConv(
2625 Sema &S, SourceLocation Loc, QualType T, QualType ConvTy) = 0;
2626
2627 /// \brief Emits a note for the explicit conversion function.
2628 virtual SemaDiagnosticBuilder
2629 noteExplicitConv(Sema &S, CXXConversionDecl *Conv, QualType ConvTy) = 0;
2630
2631 /// \brief Emits a diagnostic when there are multiple possible conversion
2632 /// functions.
2633 virtual SemaDiagnosticBuilder
2634 diagnoseAmbiguous(Sema &S, SourceLocation Loc, QualType T) = 0;
2635
2636 /// \brief Emits a note for one of the candidate conversions.
2637 virtual SemaDiagnosticBuilder
2638 noteAmbiguous(Sema &S, CXXConversionDecl *Conv, QualType ConvTy) = 0;
2639
2640 /// \brief Emits a diagnostic when we picked a conversion function
2641 /// (for cases when we are not allowed to pick a conversion function).
2642 virtual SemaDiagnosticBuilder diagnoseConversion(
2643 Sema &S, SourceLocation Loc, QualType T, QualType ConvTy) = 0;
2644
2645 virtual ~ContextualImplicitConverter() {}
2646 };
2647
2648 class ICEConvertDiagnoser : public ContextualImplicitConverter {
2649 bool AllowScopedEnumerations;
2650
2651 public:
2652 ICEConvertDiagnoser(bool AllowScopedEnumerations,
2653 bool Suppress, bool SuppressConversion)
2654 : ContextualImplicitConverter(Suppress, SuppressConversion),
2655 AllowScopedEnumerations(AllowScopedEnumerations) {}
2656
2657 /// Match an integral or (possibly scoped) enumeration type.
2658 bool match(QualType T) override;
2659
2660 SemaDiagnosticBuilder
2661 diagnoseNoMatch(Sema &S, SourceLocation Loc, QualType T) override {
2662 return diagnoseNotInt(S, Loc, T);
2663 }
2664
2665 /// \brief Emits a diagnostic complaining that the expression does not have
2666 /// integral or enumeration type.
2667 virtual SemaDiagnosticBuilder
2668 diagnoseNotInt(Sema &S, SourceLocation Loc, QualType T) = 0;
2669 };
2670
2671 /// Perform a contextual implicit conversion.
2672 ExprResult PerformContextualImplicitConversion(
2673 SourceLocation Loc, Expr *FromE, ContextualImplicitConverter &Converter);
2674
2675
2676 enum ObjCSubscriptKind {
2677 OS_Array,
2678 OS_Dictionary,
2679 OS_Error
2680 };
2681 ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE);
2682
2683 // Note that LK_String is intentionally after the other literals, as
2684 // this is used for diagnostics logic.
2685 enum ObjCLiteralKind {
2686 LK_Array,
2687 LK_Dictionary,
2688 LK_Numeric,
2689 LK_Boxed,
2690 LK_String,
2691 LK_Block,
2692 LK_None
2693 };
2694 ObjCLiteralKind CheckLiteralKind(Expr *FromE);
2695
2696 ExprResult PerformObjectMemberConversion(Expr *From,
2697 NestedNameSpecifier *Qualifier,
2698 NamedDecl *FoundDecl,
2699 NamedDecl *Member);
2700
2701 // Members have to be NamespaceDecl* or TranslationUnitDecl*.
2702 // TODO: make this is a typesafe union.
2703 typedef llvm::SmallSetVector<DeclContext *, 16> AssociatedNamespaceSet;
2704 typedef llvm::SmallSetVector<CXXRecordDecl *, 16> AssociatedClassSet;
2705
2706 void AddOverloadCandidate(FunctionDecl *Function,
2707 DeclAccessPair FoundDecl,
2708 ArrayRef<Expr *> Args,
2709 OverloadCandidateSet &CandidateSet,
2710 bool SuppressUserConversions = false,
2711 bool PartialOverloading = false,
2712 bool AllowExplicit = false,
2713 ConversionSequenceList EarlyConversions = None);
2714 void AddFunctionCandidates(const UnresolvedSetImpl &Functions,
2715 ArrayRef<Expr *> Args,
2716 OverloadCandidateSet &CandidateSet,
2717 TemplateArgumentListInfo *ExplicitTemplateArgs = nullptr,
2718 bool SuppressUserConversions = false,
2719 bool PartialOverloading = false,
2720 bool FirstArgumentIsBase = false);
2721 void AddMethodCandidate(DeclAccessPair FoundDecl,
2722 QualType ObjectType,
2723 Expr::Classification ObjectClassification,
2724 ArrayRef<Expr *> Args,
2725 OverloadCandidateSet& CandidateSet,
2726 bool SuppressUserConversion = false);
2727 void AddMethodCandidate(CXXMethodDecl *Method,
2728 DeclAccessPair FoundDecl,
2729 CXXRecordDecl *ActingContext, QualType ObjectType,
2730 Expr::Classification ObjectClassification,
2731 ArrayRef<Expr *> Args,
2732 OverloadCandidateSet& CandidateSet,
2733 bool SuppressUserConversions = false,
2734 bool PartialOverloading = false,
2735 ConversionSequenceList EarlyConversions = None);
2736 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl,
2737 DeclAccessPair FoundDecl,
2738 CXXRecordDecl *ActingContext,
2739 TemplateArgumentListInfo *ExplicitTemplateArgs,
2740 QualType ObjectType,
2741 Expr::Classification ObjectClassification,
2742 ArrayRef<Expr *> Args,
2743 OverloadCandidateSet& CandidateSet,
2744 bool SuppressUserConversions = false,
2745 bool PartialOverloading = false);
2746 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate,
2747 DeclAccessPair FoundDecl,
2748 TemplateArgumentListInfo *ExplicitTemplateArgs,
2749 ArrayRef<Expr *> Args,
2750 OverloadCandidateSet& CandidateSet,
2751 bool SuppressUserConversions = false,
2752 bool PartialOverloading = false);
2753 bool CheckNonDependentConversions(FunctionTemplateDecl *FunctionTemplate,
2754 ArrayRef<QualType> ParamTypes,
2755 ArrayRef<Expr *> Args,
2756 OverloadCandidateSet &CandidateSet,
2757 ConversionSequenceList &Conversions,
2758 bool SuppressUserConversions,
2759 CXXRecordDecl *ActingContext = nullptr,
2760 QualType ObjectType = QualType(),
2761 Expr::Classification
2762 ObjectClassification = {});
2763 void AddConversionCandidate(CXXConversionDecl *Conversion,
2764 DeclAccessPair FoundDecl,
2765 CXXRecordDecl *ActingContext,
2766 Expr *From, QualType ToType,
2767 OverloadCandidateSet& CandidateSet,
2768 bool AllowObjCConversionOnExplicit,
2769 bool AllowResultConversion = true);
2770 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate,
2771 DeclAccessPair FoundDecl,
2772 CXXRecordDecl *ActingContext,
2773 Expr *From, QualType ToType,
2774 OverloadCandidateSet &CandidateSet,
2775 bool AllowObjCConversionOnExplicit,
2776 bool AllowResultConversion = true);
2777 void AddSurrogateCandidate(CXXConversionDecl *Conversion,
2778 DeclAccessPair FoundDecl,
2779 CXXRecordDecl *ActingContext,
2780 const FunctionProtoType *Proto,
2781 Expr *Object, ArrayRef<Expr *> Args,
2782 OverloadCandidateSet& CandidateSet);
2783 void AddMemberOperatorCandidates(OverloadedOperatorKind Op,
2784 SourceLocation OpLoc, ArrayRef<Expr *> Args,
2785 OverloadCandidateSet& CandidateSet,
2786 SourceRange OpRange = SourceRange());
2787 void AddBuiltinCandidate(QualType *ParamTys, ArrayRef<Expr *> Args,
2788 OverloadCandidateSet& CandidateSet,
2789 bool IsAssignmentOperator = false,
2790 unsigned NumContextualBoolArguments = 0);
2791 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op,
2792 SourceLocation OpLoc, ArrayRef<Expr *> Args,
2793 OverloadCandidateSet& CandidateSet);
2794 void AddArgumentDependentLookupCandidates(DeclarationName Name,
2795 SourceLocation Loc,
2796 ArrayRef<Expr *> Args,
2797 TemplateArgumentListInfo *ExplicitTemplateArgs,
2798 OverloadCandidateSet& CandidateSet,
2799 bool PartialOverloading = false);
2800
2801 // Emit as a 'note' the specific overload candidate
2802 void NoteOverloadCandidate(NamedDecl *Found, FunctionDecl *Fn,
2803 QualType DestType = QualType(),
2804 bool TakingAddress = false);
2805
2806 // Emit as a series of 'note's all template and non-templates identified by
2807 // the expression Expr
2808 void NoteAllOverloadCandidates(Expr *E, QualType DestType = QualType(),
2809 bool TakingAddress = false);
2810
2811 /// Check the enable_if expressions on the given function. Returns the first
2812 /// failing attribute, or NULL if they were all successful.
2813 EnableIfAttr *CheckEnableIf(FunctionDecl *Function, ArrayRef<Expr *> Args,
2814 bool MissingImplicitThis = false);
2815
2816 /// Find the failed Boolean condition within a given Boolean
2817 /// constant expression, and describe it with a string.
2818 ///
2819 /// \param AllowTopLevelCond Whether to allow the result to be the
2820 /// complete top-level condition.
2821 std::pair<Expr *, std::string>
2822 findFailedBooleanCondition(Expr *Cond, bool AllowTopLevelCond);
2823
2824 /// Emit diagnostics for the diagnose_if attributes on Function, ignoring any
2825 /// non-ArgDependent DiagnoseIfAttrs.
2826 ///
2827 /// Argument-dependent diagnose_if attributes should be checked each time a
2828 /// function is used as a direct callee of a function call.
2829 ///
2830 /// Returns true if any errors were emitted.
2831 bool diagnoseArgDependentDiagnoseIfAttrs(const FunctionDecl *Function,
2832 const Expr *ThisArg,
2833 ArrayRef<const Expr *> Args,
2834 SourceLocation Loc);
2835
2836 /// Emit diagnostics for the diagnose_if attributes on Function, ignoring any
2837 /// ArgDependent DiagnoseIfAttrs.
2838 ///
2839 /// Argument-independent diagnose_if attributes should be checked on every use
2840 /// of a function.
2841 ///
2842 /// Returns true if any errors were emitted.
2843 bool diagnoseArgIndependentDiagnoseIfAttrs(const NamedDecl *ND,
2844 SourceLocation Loc);
2845
2846 /// Returns whether the given function's address can be taken or not,
2847 /// optionally emitting a diagnostic if the address can't be taken.
2848 ///
2849 /// Returns false if taking the address of the function is illegal.
2850 bool checkAddressOfFunctionIsAvailable(const FunctionDecl *Function,
2851 bool Complain = false,
2852 SourceLocation Loc = SourceLocation());
2853
2854 // [PossiblyAFunctionType] --> [Return]
2855 // NonFunctionType --> NonFunctionType
2856 // R (A) --> R(A)
2857 // R (*)(A) --> R (A)
2858 // R (&)(A) --> R (A)
2859 // R (S::*)(A) --> R (A)
2860 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType);
2861
2862 FunctionDecl *
2863 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr,
2864 QualType TargetType,
2865 bool Complain,
2866 DeclAccessPair &Found,
2867 bool *pHadMultipleCandidates = nullptr);
2868
2869 FunctionDecl *
2870 resolveAddressOfOnlyViableOverloadCandidate(Expr *E,
2871 DeclAccessPair &FoundResult);
2872
2873 bool resolveAndFixAddressOfOnlyViableOverloadCandidate(
2874 ExprResult &SrcExpr, bool DoFunctionPointerConversion = false);
2875
2876 FunctionDecl *
2877 ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl,
2878 bool Complain = false,
2879 DeclAccessPair *Found = nullptr);
2880
2881 bool ResolveAndFixSingleFunctionTemplateSpecialization(
2882 ExprResult &SrcExpr,
2883 bool DoFunctionPointerConverion = false,
2884 bool Complain = false,
2885 SourceRange OpRangeForComplaining = SourceRange(),
2886 QualType DestTypeForComplaining = QualType(),
2887 unsigned DiagIDForComplaining = 0);
2888
2889
2890 Expr *FixOverloadedFunctionReference(Expr *E,
2891 DeclAccessPair FoundDecl,
2892 FunctionDecl *Fn);
2893 ExprResult FixOverloadedFunctionReference(ExprResult,
2894 DeclAccessPair FoundDecl,
2895 FunctionDecl *Fn);
2896
2897 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE,
2898 ArrayRef<Expr *> Args,
2899 OverloadCandidateSet &CandidateSet,
2900 bool PartialOverloading = false);
2901
2902 // An enum used to represent the different possible results of building a
2903 // range-based for loop.
2904 enum ForRangeStatus {
2905 FRS_Success,
2906 FRS_NoViableFunction,
2907 FRS_DiagnosticIssued
2908 };
2909
2910 ForRangeStatus BuildForRangeBeginEndCall(SourceLocation Loc,
2911 SourceLocation RangeLoc,
2912 const DeclarationNameInfo &NameInfo,
2913 LookupResult &MemberLookup,
2914 OverloadCandidateSet *CandidateSet,
2915 Expr *Range, ExprResult *CallExpr);
2916
2917 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn,
2918 UnresolvedLookupExpr *ULE,
2919 SourceLocation LParenLoc,
2920 MultiExprArg Args,
2921 SourceLocation RParenLoc,
2922 Expr *ExecConfig,
2923 bool AllowTypoCorrection=true,
2924 bool CalleesAddressIsTaken=false);
2925
2926 bool buildOverloadedCallSet(Scope *S, Expr *Fn, UnresolvedLookupExpr *ULE,
2927 MultiExprArg Args, SourceLocation RParenLoc,
2928 OverloadCandidateSet *CandidateSet,
2929 ExprResult *Result);
2930
2931 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc,
2932 UnaryOperatorKind Opc,
2933 const UnresolvedSetImpl &Fns,
2934 Expr *input, bool RequiresADL = true);
2935
2936 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc,
2937 BinaryOperatorKind Opc,
2938 const UnresolvedSetImpl &Fns,
2939 Expr *LHS, Expr *RHS,
2940 bool RequiresADL = true);
2941
2942 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc,
2943 SourceLocation RLoc,
2944 Expr *Base,Expr *Idx);
2945
2946 ExprResult
2947 BuildCallToMemberFunction(Scope *S, Expr *MemExpr,
2948 SourceLocation LParenLoc,
2949 MultiExprArg Args,
2950 SourceLocation RParenLoc);
2951 ExprResult
2952 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc,
2953 MultiExprArg Args,
2954 SourceLocation RParenLoc);
2955
2956 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base,
2957 SourceLocation OpLoc,
2958 bool *NoArrowOperatorFound = nullptr);
2959
2960 /// CheckCallReturnType - Checks that a call expression's return type is
2961 /// complete. Returns true on failure. The location passed in is the location
2962 /// that best represents the call.
2963 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc,
2964 CallExpr *CE, FunctionDecl *FD);
2965
2966 /// Helpers for dealing with blocks and functions.
2967 bool CheckParmsForFunctionDef(ArrayRef<ParmVarDecl *> Parameters,
2968 bool CheckParameterNames);
2969 void CheckCXXDefaultArguments(FunctionDecl *FD);
2970 void CheckExtraCXXDefaultArguments(Declarator &D);
2971 Scope *getNonFieldDeclScope(Scope *S);
2972
2973 /// \name Name lookup
2974 ///
2975 /// These routines provide name lookup that is used during semantic
2976 /// analysis to resolve the various kinds of names (identifiers,
2977 /// overloaded operator names, constructor names, etc.) into zero or
2978 /// more declarations within a particular scope. The major entry
2979 /// points are LookupName, which performs unqualified name lookup,
2980 /// and LookupQualifiedName, which performs qualified name lookup.
2981 ///
2982 /// All name lookup is performed based on some specific criteria,
2983 /// which specify what names will be visible to name lookup and how
2984 /// far name lookup should work. These criteria are important both
2985 /// for capturing language semantics (certain lookups will ignore
2986 /// certain names, for example) and for performance, since name
2987 /// lookup is often a bottleneck in the compilation of C++. Name
2988 /// lookup criteria is specified via the LookupCriteria enumeration.
2989 ///
2990 /// The results of name lookup can vary based on the kind of name
2991 /// lookup performed, the current language, and the translation
2992 /// unit. In C, for example, name lookup will either return nothing
2993 /// (no entity found) or a single declaration. In C++, name lookup
2994 /// can additionally refer to a set of overloaded functions or
2995 /// result in an ambiguity. All of the possible results of name
2996 /// lookup are captured by the LookupResult class, which provides
2997 /// the ability to distinguish among them.
2998 //@{
2999
3000 /// @brief Describes the kind of name lookup to perform.
3001 enum LookupNameKind {
3002 /// Ordinary name lookup, which finds ordinary names (functions,
3003 /// variables, typedefs, etc.) in C and most kinds of names
3004 /// (functions, variables, members, types, etc.) in C++.
3005 LookupOrdinaryName = 0,
3006 /// Tag name lookup, which finds the names of enums, classes,
3007 /// structs, and unions.
3008 LookupTagName,
3009 /// Label name lookup.
3010 LookupLabel,
3011 /// Member name lookup, which finds the names of
3012 /// class/struct/union members.
3013 LookupMemberName,
3014 /// Look up of an operator name (e.g., operator+) for use with
3015 /// operator overloading. This lookup is similar to ordinary name
3016 /// lookup, but will ignore any declarations that are class members.
3017 LookupOperatorName,
3018 /// Look up of a name that precedes the '::' scope resolution
3019 /// operator in C++. This lookup completely ignores operator, object,
3020 /// function, and enumerator names (C++ [basic.lookup.qual]p1).
3021 LookupNestedNameSpecifierName,
3022 /// Look up a namespace name within a C++ using directive or
3023 /// namespace alias definition, ignoring non-namespace names (C++
3024 /// [basic.lookup.udir]p1).
3025 LookupNamespaceName,
3026 /// Look up all declarations in a scope with the given name,
3027 /// including resolved using declarations. This is appropriate
3028 /// for checking redeclarations for a using declaration.
3029 LookupUsingDeclName,
3030 /// Look up an ordinary name that is going to be redeclared as a
3031 /// name with linkage. This lookup ignores any declarations that
3032 /// are outside of the current scope unless they have linkage. See
3033 /// C99 6.2.2p4-5 and C++ [basic.link]p6.
3034 LookupRedeclarationWithLinkage,
3035 /// Look up a friend of a local class. This lookup does not look
3036 /// outside the innermost non-class scope. See C++11 [class.friend]p11.
3037 LookupLocalFriendName,
3038 /// Look up the name of an Objective-C protocol.
3039 LookupObjCProtocolName,
3040 /// Look up implicit 'self' parameter of an objective-c method.
3041 LookupObjCImplicitSelfParam,
3042 /// \brief Look up the name of an OpenMP user-defined reduction operation.
3043 LookupOMPReductionName,
3044 /// \brief Look up any declaration with any name.
3045 LookupAnyName
3046 };
3047
3048 /// \brief Specifies whether (or how) name lookup is being performed for a
3049 /// redeclaration (vs. a reference).
3050 enum RedeclarationKind {
3051 /// \brief The lookup is a reference to this name that is not for the
3052 /// purpose of redeclaring the name.
3053 NotForRedeclaration = 0,
3054 /// \brief The lookup results will be used for redeclaration of a name,
3055 /// if an entity by that name already exists and is visible.
3056 ForVisibleRedeclaration,
3057 /// \brief The lookup results will be used for redeclaration of a name
3058 /// with external linkage; non-visible lookup results with external linkage
3059 /// may also be found.
3060 ForExternalRedeclaration
3061 };
3062
3063 RedeclarationKind forRedeclarationInCurContext() {
3064 // A declaration with an owning module for linkage can never link against
3065 // anything that is not visible. We don't need to check linkage here; if
3066 // the context has internal linkage, redeclaration lookup won't find things
3067 // from other TUs, and we can't safely compute linkage yet in general.
3068 if (cast<Decl>(CurContext)
3069 ->getOwningModuleForLinkage(/*IgnoreLinkage*/true))
3070 return ForVisibleRedeclaration;
3071 return ForExternalRedeclaration;
3072 }
3073
3074 /// \brief The possible outcomes of name lookup for a literal operator.
3075 enum LiteralOperatorLookupResult {
3076 /// \brief The lookup resulted in an error.
3077 LOLR_Error,
3078 /// \brief The lookup found no match but no diagnostic was issued.
3079 LOLR_ErrorNoDiagnostic,
3080 /// \brief The lookup found a single 'cooked' literal operator, which
3081 /// expects a normal literal to be built and passed to it.
3082 LOLR_Cooked,
3083 /// \brief The lookup found a single 'raw' literal operator, which expects
3084 /// a string literal containing the spelling of the literal token.
3085 LOLR_Raw,
3086 /// \brief The lookup found an overload set of literal operator templates,
3087 /// which expect the characters of the spelling of the literal token to be
3088 /// passed as a non-type template argument pack.
3089 LOLR_Template,
3090 /// \brief The lookup found an overload set of literal operator templates,
3091 /// which expect the character type and characters of the spelling of the
3092 /// string literal token to be passed as template arguments.
3093 LOLR_StringTemplate
3094 };
3095
3096 SpecialMemberOverloadResult LookupSpecialMember(CXXRecordDecl *D,
3097 CXXSpecialMember SM,
3098 bool ConstArg,
3099 bool VolatileArg,
3100 bool RValueThis,
3101 bool ConstThis,
3102 bool VolatileThis);
3103
3104 typedef std::function<void(const TypoCorrection &)> TypoDiagnosticGenerator;
3105 typedef std::function<ExprResult(Sema &, TypoExpr *, TypoCorrection)>
3106 TypoRecoveryCallback;
3107
3108private:
3109 bool CppLookupName(LookupResult &R, Scope *S);
3110
3111 struct TypoExprState {
3112 std::unique_ptr<TypoCorrectionConsumer> Consumer;
3113 TypoDiagnosticGenerator DiagHandler;
3114 TypoRecoveryCallback RecoveryHandler;
3115 TypoExprState();
3116 TypoExprState(TypoExprState &&other) noexcept;
3117 TypoExprState &operator=(TypoExprState &&other) noexcept;
3118 };
3119
3120 /// \brief The set of unhandled TypoExprs and their associated state.
3121 llvm::MapVector<TypoExpr *, TypoExprState> DelayedTypos;
3122
3123 /// \brief Creates a new TypoExpr AST node.
3124 TypoExpr *createDelayedTypo(std::unique_ptr<TypoCorrectionConsumer> TCC,
3125 TypoDiagnosticGenerator TDG,
3126 TypoRecoveryCallback TRC);
3127
3128 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls.
3129 //
3130 // The boolean value will be true to indicate that the namespace was loaded
3131 // from an AST/PCH file, or false otherwise.
3132 llvm::MapVector<NamespaceDecl*, bool> KnownNamespaces;
3133
3134 /// \brief Whether we have already loaded known namespaces from an extenal
3135 /// source.
3136 bool LoadedExternalKnownNamespaces;
3137
3138 /// \brief Helper for CorrectTypo and CorrectTypoDelayed used to create and
3139 /// populate a new TypoCorrectionConsumer. Returns nullptr if typo correction
3140 /// should be skipped entirely.
3141 std::unique_ptr<TypoCorrectionConsumer>
3142 makeTypoCorrectionConsumer(const DeclarationNameInfo &Typo,
3143 Sema::LookupNameKind LookupKind, Scope *S,
3144 CXXScopeSpec *SS,
3145 std::unique_ptr<CorrectionCandidateCallback> CCC,
3146 DeclContext *MemberContext, bool EnteringContext,
3147 const ObjCObjectPointerType *OPT,
3148 bool ErrorRecovery);
3149
3150public:
3151 const TypoExprState &getTypoExprState(TypoExpr *TE) const;
3152
3153 /// \brief Clears the state of the given TypoExpr.
3154 void clearDelayedTypo(TypoExpr *TE);
3155
3156 /// \brief Look up a name, looking for a single declaration. Return
3157 /// null if the results were absent, ambiguous, or overloaded.
3158 ///
3159 /// It is preferable to use the elaborated form and explicitly handle
3160 /// ambiguity and overloaded.
3161 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name,
3162 SourceLocation Loc,
3163 LookupNameKind NameKind,
3164 RedeclarationKind Redecl
3165 = NotForRedeclaration);
3166 bool LookupName(LookupResult &R, Scope *S,
3167 bool AllowBuiltinCreation = false);
3168 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx,
3169 bool InUnqualifiedLookup = false);
3170 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx,
3171 CXXScopeSpec &SS);
3172 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS,
3173 bool AllowBuiltinCreation = false,
3174 bool EnteringContext = false);
3175 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc,
3176 RedeclarationKind Redecl
3177 = NotForRedeclaration);
3178 bool LookupInSuper(LookupResult &R, CXXRecordDecl *Class);
3179
3180 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S,
3181 QualType T1, QualType T2,
3182 UnresolvedSetImpl &Functions);
3183
3184 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc,
3185 SourceLocation GnuLabelLoc = SourceLocation());
3186
3187 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class);
3188 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class);
3189 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class,
3190 unsigned Quals);
3191 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals,
3192 bool RValueThis, unsigned ThisQuals);
3193 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class,
3194 unsigned Quals);
3195 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, unsigned Quals,
3196 bool RValueThis, unsigned ThisQuals);
3197 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class);
3198
3199 bool checkLiteralOperatorId(const CXXScopeSpec &SS, const UnqualifiedId &Id);
3200 LiteralOperatorLookupResult LookupLiteralOperator(Scope *S, LookupResult &R,
3201 ArrayRef<QualType> ArgTys,
3202 bool AllowRaw,
3203 bool AllowTemplate,
3204 bool AllowStringTemplate,
3205 bool DiagnoseMissing);
3206 bool isKnownName(StringRef name);
3207
3208 void ArgumentDependentLookup(DeclarationName Name, SourceLocation Loc,
3209 ArrayRef<Expr *> Args, ADLResult &Functions);
3210
3211 void LookupVisibleDecls(Scope *S, LookupNameKind Kind,
3212 VisibleDeclConsumer &Consumer,
3213 bool IncludeGlobalScope = true,
3214 bool LoadExternal = true);
3215 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind,
3216 VisibleDeclConsumer &Consumer,
3217 bool IncludeGlobalScope = true,
3218 bool IncludeDependentBases = false,
3219 bool LoadExternal = true);
3220
3221 enum CorrectTypoKind {
3222 CTK_NonError, // CorrectTypo used in a non error recovery situation.
3223 CTK_ErrorRecovery // CorrectTypo used in normal error recovery.
3224 };
3225
3226 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo,
3227 Sema::LookupNameKind LookupKind,
3228 Scope *S, CXXScopeSpec *SS,
3229 std::unique_ptr<CorrectionCandidateCallback> CCC,
3230 CorrectTypoKind Mode,
3231 DeclContext *MemberContext = nullptr,
3232 bool EnteringContext = false,
3233 const ObjCObjectPointerType *OPT = nullptr,
3234 bool RecordFailure = true);
3235
3236 TypoExpr *CorrectTypoDelayed(const DeclarationNameInfo &Typo,
3237 Sema::LookupNameKind LookupKind, Scope *S,
3238 CXXScopeSpec *SS,
3239 std::unique_ptr<CorrectionCandidateCallback> CCC,
3240 TypoDiagnosticGenerator TDG,
3241 TypoRecoveryCallback TRC, CorrectTypoKind Mode,
3242 DeclContext *MemberContext = nullptr,
3243 bool EnteringContext = false,
3244 const ObjCObjectPointerType *OPT = nullptr);
3245
3246 /// \brief Process any TypoExprs in the given Expr and its children,
3247 /// generating diagnostics as appropriate and returning a new Expr if there
3248 /// were typos that were all successfully corrected and ExprError if one or
3249 /// more typos could not be corrected.
3250 ///
3251 /// \param E The Expr to check for TypoExprs.
3252 ///
3253 /// \param InitDecl A VarDecl to avoid because the Expr being corrected is its
3254 /// initializer.
3255 ///
3256 /// \param Filter A function applied to a newly rebuilt Expr to determine if
3257 /// it is an acceptable/usable result from a single combination of typo
3258 /// corrections. As long as the filter returns ExprError, different
3259 /// combinations of corrections will be tried until all are exhausted.
3260 ExprResult
3261 CorrectDelayedTyposInExpr(Expr *E, VarDecl *InitDecl = nullptr,
3262 llvm::function_ref<ExprResult(Expr *)> Filter =
3263 [](Expr *E) -> ExprResult { return E; });
3264
3265 ExprResult
3266 CorrectDelayedTyposInExpr(Expr *E,
3267 llvm::function_ref<ExprResult(Expr *)> Filter) {
3268 return CorrectDelayedTyposInExpr(E, nullptr, Filter);
3269 }
3270
3271 ExprResult
3272 CorrectDelayedTyposInExpr(ExprResult ER, VarDecl *InitDecl = nullptr,
3273 llvm::function_ref<ExprResult(Expr *)> Filter =
3274 [](Expr *E) -> ExprResult { return E; }) {
3275 return ER.isInvalid() ? ER : CorrectDelayedTyposInExpr(ER.get(), Filter);
3276 }
3277
3278 ExprResult
3279 CorrectDelayedTyposInExpr(ExprResult ER,
3280 llvm::function_ref<ExprResult(Expr *)> Filter) {
3281 return CorrectDelayedTyposInExpr(ER, nullptr, Filter);
3282 }
3283
3284 void diagnoseTypo(const TypoCorrection &Correction,
3285 const PartialDiagnostic &TypoDiag,
3286 bool ErrorRecovery = true);
3287
3288 void diagnoseTypo(const TypoCorrection &Correction,
3289 const PartialDiagnostic &TypoDiag,
3290 const PartialDiagnostic &PrevNote,
3291 bool ErrorRecovery = true);
3292
3293 void MarkTypoCorrectedFunctionDefinition(const NamedDecl *F);
3294
3295 void FindAssociatedClassesAndNamespaces(SourceLocation InstantiationLoc,
3296 ArrayRef<Expr *> Args,
3297 AssociatedNamespaceSet &AssociatedNamespaces,
3298 AssociatedClassSet &AssociatedClasses);
3299
3300 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S,
3301 bool ConsiderLinkage, bool AllowInlineNamespace);
3302
3303 bool CheckRedeclarationModuleOwnership(NamedDecl *New, NamedDecl *Old);
3304
3305 void DiagnoseAmbiguousLookup(LookupResult &Result);
3306 //@}
3307
3308 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id,
3309 SourceLocation IdLoc,
3310 bool TypoCorrection = false);
3311 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID,
3312 Scope *S, bool ForRedeclaration,
3313 SourceLocation Loc);
3314 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II,
3315 Scope *S);
3316 void AddKnownFunctionAttributes(FunctionDecl *FD);
3317
3318 // More parsing and symbol table subroutines.
3319
3320 void ProcessPragmaWeak(Scope *S, Decl *D);
3321 // Decl attributes - this routine is the top level dispatcher.
3322 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD);
3323 // Helper for delayed processing of attributes.
3324 void ProcessDeclAttributeDelayed(Decl *D, const AttributeList *AttrList);
3325 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL,
3326 bool IncludeCXX11Attributes = true);
3327 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl,
3328 const AttributeList *AttrList);
3329
3330 void checkUnusedDeclAttributes(Declarator &D);
3331
3332 /// Determine if type T is a valid subject for a nonnull and similar
3333 /// attributes. By default, we look through references (the behavior used by
3334 /// nonnull), but if the second parameter is true, then we treat a reference
3335 /// type as valid.
3336 bool isValidPointerAttrType(QualType T, bool RefOkay = false);
3337
3338 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value);
3339 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC,
3340 const FunctionDecl *FD = nullptr);
3341 bool CheckNoReturnAttr(const AttributeList &attr);
3342 bool CheckNoCallerSavedRegsAttr(const AttributeList &attr);
3343 bool checkStringLiteralArgumentAttr(const AttributeList &Attr,
3344 unsigned ArgNum, StringRef &Str,
3345 SourceLocation *ArgLocation = nullptr);
3346 bool checkSectionName(SourceLocation LiteralLoc, StringRef Str);
3347 bool checkTargetAttr(SourceLocation LiteralLoc, StringRef Str);
3348 bool checkMSInheritanceAttrOnDefinition(
3349 CXXRecordDecl *RD, SourceRange Range, bool BestCase,
3350 MSInheritanceAttr::Spelling SemanticSpelling);
3351
3352 void CheckAlignasUnderalignment(Decl *D);
3353
3354 /// Adjust the calling convention of a method to be the ABI default if it
3355 /// wasn't specified explicitly. This handles method types formed from
3356 /// function type typedefs and typename template arguments.
3357 void adjustMemberFunctionCC(QualType &T, bool IsStatic, bool IsCtorOrDtor,
3358 SourceLocation Loc);
3359
3360 // Check if there is an explicit attribute, but only look through parens.
3361 // The intent is to look for an attribute on the current declarator, but not
3362 // one that came from a typedef.
3363 bool hasExplicitCallingConv(QualType &T);
3364
3365 /// Get the outermost AttributedType node that sets a calling convention.
3366 /// Valid types should not have multiple attributes with different CCs.
3367 const AttributedType *getCallingConvAttributedType(QualType T) const;
3368
3369 /// Check whether a nullability type specifier can be added to the given
3370 /// type.
3371 ///
3372 /// \param type The type to which the nullability specifier will be
3373 /// added. On success, this type will be updated appropriately.
3374 ///
3375 /// \param nullability The nullability specifier to add.
3376 ///
3377 /// \param nullabilityLoc The location of the nullability specifier.
3378 ///
3379 /// \param isContextSensitive Whether this nullability specifier was
3380 /// written as a context-sensitive keyword (in an Objective-C
3381 /// method) or an Objective-C property attribute, rather than as an
3382 /// underscored type specifier.
3383 ///
3384 /// \param allowArrayTypes Whether to accept nullability specifiers on an
3385 /// array type (e.g., because it will decay to a pointer).
3386 ///
3387 /// \returns true if nullability cannot be applied, false otherwise.
3388 bool checkNullabilityTypeSpecifier(QualType &type, NullabilityKind nullability,
3389 SourceLocation nullabilityLoc,
3390 bool isContextSensitive,
3391 bool allowArrayTypes);
3392
3393 /// \brief Stmt attributes - this routine is the top level dispatcher.
3394 StmtResult ProcessStmtAttributes(Stmt *Stmt, AttributeList *Attrs,
3395 SourceRange Range);
3396
3397 void WarnConflictingTypedMethods(ObjCMethodDecl *Method,
3398 ObjCMethodDecl *MethodDecl,
3399 bool IsProtocolMethodDecl);
3400
3401 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method,
3402 ObjCMethodDecl *Overridden,
3403 bool IsProtocolMethodDecl);
3404
3405 /// WarnExactTypedMethods - This routine issues a warning if method
3406 /// implementation declaration matches exactly that of its declaration.
3407 void WarnExactTypedMethods(ObjCMethodDecl *Method,
3408 ObjCMethodDecl *MethodDecl,
3409 bool IsProtocolMethodDecl);
3410
3411 typedef llvm::SmallPtrSet<Selector, 8> SelectorSet;
3412
3413 /// CheckImplementationIvars - This routine checks if the instance variables
3414 /// listed in the implelementation match those listed in the interface.
3415 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl,
3416 ObjCIvarDecl **Fields, unsigned nIvars,
3417 SourceLocation Loc);
3418
3419 /// ImplMethodsVsClassMethods - This is main routine to warn if any method
3420 /// remains unimplemented in the class or category \@implementation.
3421 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl,
3422 ObjCContainerDecl* IDecl,
3423 bool IncompleteImpl = false);
3424
3425 /// DiagnoseUnimplementedProperties - This routine warns on those properties
3426 /// which must be implemented by this implementation.
3427 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl,
3428 ObjCContainerDecl *CDecl,
3429 bool SynthesizeProperties);
3430
3431 /// Diagnose any null-resettable synthesized setters.
3432 void diagnoseNullResettableSynthesizedSetters(const ObjCImplDecl *impDecl);
3433
3434 /// DefaultSynthesizeProperties - This routine default synthesizes all
3435 /// properties which must be synthesized in the class's \@implementation.
3436 void DefaultSynthesizeProperties(Scope *S, ObjCImplDecl *IMPDecl,
3437 ObjCInterfaceDecl *IDecl,
3438 SourceLocation AtEnd);
3439 void DefaultSynthesizeProperties(Scope *S, Decl *D, SourceLocation AtEnd);
3440
3441 /// IvarBacksCurrentMethodAccessor - This routine returns 'true' if 'IV' is
3442 /// an ivar synthesized for 'Method' and 'Method' is a property accessor
3443 /// declared in class 'IFace'.
3444 bool IvarBacksCurrentMethodAccessor(ObjCInterfaceDecl *IFace,
3445 ObjCMethodDecl *Method, ObjCIvarDecl *IV);
3446
3447 /// DiagnoseUnusedBackingIvarInAccessor - Issue an 'unused' warning if ivar which
3448 /// backs the property is not used in the property's accessor.
3449 void DiagnoseUnusedBackingIvarInAccessor(Scope *S,
3450 const ObjCImplementationDecl *ImplD);
3451
3452 /// GetIvarBackingPropertyAccessor - If method is a property setter/getter and
3453 /// it property has a backing ivar, returns this ivar; otherwise, returns NULL.
3454 /// It also returns ivar's property on success.
3455 ObjCIvarDecl *GetIvarBackingPropertyAccessor(const ObjCMethodDecl *Method,
3456 const ObjCPropertyDecl *&PDecl) const;
3457
3458 /// Called by ActOnProperty to handle \@property declarations in
3459 /// class extensions.
3460 ObjCPropertyDecl *HandlePropertyInClassExtension(Scope *S,
3461 SourceLocation AtLoc,
3462 SourceLocation LParenLoc,
3463 FieldDeclarator &FD,
3464 Selector GetterSel,
3465 SourceLocation GetterNameLoc,
3466 Selector SetterSel,
3467 SourceLocation SetterNameLoc,
3468 const bool isReadWrite,
3469 unsigned &Attributes,
3470 const unsigned AttributesAsWritten,
3471 QualType T,
3472 TypeSourceInfo *TSI,
3473 tok::ObjCKeywordKind MethodImplKind);
3474
3475 /// Called by ActOnProperty and HandlePropertyInClassExtension to
3476 /// handle creating the ObjcPropertyDecl for a category or \@interface.
3477 ObjCPropertyDecl *CreatePropertyDecl(Scope *S,
3478 ObjCContainerDecl *CDecl,
3479 SourceLocation AtLoc,
3480 SourceLocation LParenLoc,
3481 FieldDeclarator &FD,
3482 Selector GetterSel,
3483 SourceLocation GetterNameLoc,
3484 Selector SetterSel,
3485 SourceLocation SetterNameLoc,
3486 const bool isReadWrite,
3487 const unsigned Attributes,
3488 const unsigned AttributesAsWritten,
3489 QualType T,
3490 TypeSourceInfo *TSI,
3491 tok::ObjCKeywordKind MethodImplKind,
3492 DeclContext *lexicalDC = nullptr);
3493
3494 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via
3495 /// warning) when atomic property has one but not the other user-declared
3496 /// setter or getter.
3497 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl,
3498 ObjCInterfaceDecl* IDecl);
3499
3500 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D);
3501
3502 void DiagnoseMissingDesignatedInitOverrides(
3503 const ObjCImplementationDecl *ImplD,
3504 const ObjCInterfaceDecl *IFD);
3505
3506 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID);
3507
3508 enum MethodMatchStrategy {
3509 MMS_loose,
3510 MMS_strict
3511 };
3512
3513 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns
3514 /// true, or false, accordingly.
3515 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method,
3516 const ObjCMethodDecl *PrevMethod,
3517 MethodMatchStrategy strategy = MMS_strict);
3518
3519 /// MatchAllMethodDeclarations - Check methods declaraed in interface or
3520 /// or protocol against those declared in their implementations.
3521 void MatchAllMethodDeclarations(const SelectorSet &InsMap,
3522 const SelectorSet &ClsMap,
3523 SelectorSet &InsMapSeen,
3524 SelectorSet &ClsMapSeen,
3525 ObjCImplDecl* IMPDecl,
3526 ObjCContainerDecl* IDecl,
3527 bool &IncompleteImpl,
3528 bool ImmediateClass,
3529 bool WarnCategoryMethodImpl=false);
3530
3531 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in
3532 /// category matches with those implemented in its primary class and
3533 /// warns each time an exact match is found.
3534 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP);
3535
3536 /// \brief Add the given method to the list of globally-known methods.
3537 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method);
3538
3539private:
3540 /// AddMethodToGlobalPool - Add an instance or factory method to the global
3541 /// pool. See descriptoin of AddInstanceMethodToGlobalPool.
3542 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance);
3543
3544 /// LookupMethodInGlobalPool - Returns the instance or factory method and
3545 /// optionally warns if there are multiple signatures.
3546 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R,
3547 bool receiverIdOrClass,
3548 bool instance);
3549
3550public:
3551 /// \brief - Returns instance or factory methods in global method pool for
3552 /// given selector. It checks the desired kind first, if none is found, and
3553 /// parameter checkTheOther is set, it then checks the other kind. If no such
3554 /// method or only one method is found, function returns false; otherwise, it
3555 /// returns true.
3556 bool
3557 CollectMultipleMethodsInGlobalPool(Selector Sel,
3558 SmallVectorImpl<ObjCMethodDecl*>& Methods,
3559 bool InstanceFirst, bool CheckTheOther,
3560 const ObjCObjectType *TypeBound = nullptr);
3561
3562 bool
3563 AreMultipleMethodsInGlobalPool(Selector Sel, ObjCMethodDecl *BestMethod,
3564 SourceRange R, bool receiverIdOrClass,
3565 SmallVectorImpl<ObjCMethodDecl*>& Methods);
3566
3567 void
3568 DiagnoseMultipleMethodInGlobalPool(SmallVectorImpl<ObjCMethodDecl*> &Methods,
3569 Selector Sel, SourceRange R,
3570 bool receiverIdOrClass);
3571
3572private:
3573 /// \brief - Returns a selector which best matches given argument list or
3574 /// nullptr if none could be found
3575 ObjCMethodDecl *SelectBestMethod(Selector Sel, MultiExprArg Args,
3576 bool IsInstance,
3577 SmallVectorImpl<ObjCMethodDecl*>& Methods);
3578
3579
3580 /// \brief Record the typo correction failure and return an empty correction.
3581 TypoCorrection FailedCorrection(IdentifierInfo *Typo, SourceLocation TypoLoc,
3582 bool RecordFailure = true) {
3583 if (RecordFailure)
3584 TypoCorrectionFailures[Typo].insert(TypoLoc);
3585 return TypoCorrection();
3586 }
3587
3588public:
3589 /// AddInstanceMethodToGlobalPool - All instance methods in a translation
3590 /// unit are added to a global pool. This allows us to efficiently associate
3591 /// a selector with a method declaraation for purposes of typechecking
3592 /// messages sent to "id" (where the class of the object is unknown).
3593 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) {
3594 AddMethodToGlobalPool(Method, impl, /*instance*/true);
3595 }
3596
3597 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods.
3598 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) {
3599 AddMethodToGlobalPool(Method, impl, /*instance*/false);
3600 }
3601
3602 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global
3603 /// pool.
3604 void AddAnyMethodToGlobalPool(Decl *D);
3605
3606 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if
3607 /// there are multiple signatures.
3608 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R,
3609 bool receiverIdOrClass=false) {
3610 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass,
3611 /*instance*/true);
3612 }
3613
3614 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if
3615 /// there are multiple signatures.
3616 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R,
3617 bool receiverIdOrClass=false) {
3618 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass,
3619 /*instance*/false);
3620 }
3621
3622 const ObjCMethodDecl *SelectorsForTypoCorrection(Selector Sel,
3623 QualType ObjectType=QualType());
3624 /// LookupImplementedMethodInGlobalPool - Returns the method which has an
3625 /// implementation.
3626 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel);
3627
3628 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require
3629 /// initialization.
3630 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI,
3631 SmallVectorImpl<ObjCIvarDecl*> &Ivars);
3632
3633 //===--------------------------------------------------------------------===//
3634 // Statement Parsing Callbacks: SemaStmt.cpp.
3635public:
3636 class FullExprArg {
3637 public:
3638 FullExprArg() : E(nullptr) { }
3639 FullExprArg(Sema &actions) : E(nullptr) { }
3640
3641 ExprResult release() {
3642 return E;
3643 }
3644
3645 Expr *get() const { return E; }
3646
3647 Expr *operator->() {
3648 return E;
3649 }
3650
3651 private:
3652 // FIXME: No need to make the entire Sema class a friend when it's just
3653 // Sema::MakeFullExpr that needs access to the constructor below.
3654 friend class Sema;
3655
3656 explicit FullExprArg(Expr *expr) : E(expr) {}
3657
3658 Expr *E;
3659 };
3660
3661 FullExprArg MakeFullExpr(Expr *Arg) {
3662 return MakeFullExpr(Arg, Arg ? Arg->getExprLoc() : SourceLocation());
3663 }
3664 FullExprArg MakeFullExpr(Expr *Arg, SourceLocation CC) {
3665 return FullExprArg(ActOnFinishFullExpr(Arg, CC).get());
3666 }
3667 FullExprArg MakeFullDiscardedValueExpr(Expr *Arg) {
3668 ExprResult FE =
3669 ActOnFinishFullExpr(Arg, Arg ? Arg->getExprLoc() : SourceLocation(),
3670 /*DiscardedValue*/ true);
3671 return FullExprArg(FE.get());
3672 }
3673
3674 StmtResult ActOnExprStmt(ExprResult Arg);
3675 StmtResult ActOnExprStmtError();
3676
3677 StmtResult ActOnNullStmt(SourceLocation SemiLoc,
3678 bool HasLeadingEmptyMacro = false);
3679
3680 void ActOnStartOfCompoundStmt(bool IsStmtExpr);
3681 void ActOnFinishOfCompoundStmt();
3682 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R,
3683 ArrayRef<Stmt *> Elts, bool isStmtExpr);
3684
3685 /// \brief A RAII object to enter scope of a compound statement.
3686 class CompoundScopeRAII {
3687 public:
3688 CompoundScopeRAII(Sema &S, bool IsStmtExpr = false) : S(S) {
3689 S.ActOnStartOfCompoundStmt(IsStmtExpr);
3690 }
3691
3692 ~CompoundScopeRAII() {
3693 S.ActOnFinishOfCompoundStmt();
3694 }
3695
3696 private:
3697 Sema &S;
3698 };
3699
3700 /// An RAII helper that pops function a function scope on exit.
3701 struct FunctionScopeRAII {
3702 Sema &S;
3703 bool Active;
3704 FunctionScopeRAII(Sema &S) : S(S), Active(true) {}
3705 ~FunctionScopeRAII() {
3706 if (Active)
3707 S.PopFunctionScopeInfo();
3708 }
3709 void disable() { Active = false; }
3710 };
3711
3712 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl,
3713 SourceLocation StartLoc,
3714 SourceLocation EndLoc);
3715 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl);
3716 StmtResult ActOnForEachLValueExpr(Expr *E);
3717 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal,
3718 SourceLocation DotDotDotLoc, Expr *RHSVal,
3719 SourceLocation ColonLoc);
3720 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt);
3721
3722 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc,
3723 SourceLocation ColonLoc,
3724 Stmt *SubStmt, Scope *CurScope);
3725 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl,
3726 SourceLocation ColonLoc, Stmt *SubStmt);
3727
3728 StmtResult ActOnAttributedStmt(SourceLocation AttrLoc,
3729 ArrayRef<const Attr*> Attrs,
3730 Stmt *SubStmt);
3731
3732 class ConditionResult;
3733 StmtResult ActOnIfStmt(SourceLocation IfLoc, bool IsConstexpr,
3734 Stmt *InitStmt,
3735 ConditionResult Cond, Stmt *ThenVal,
3736 SourceLocation ElseLoc, Stmt *ElseVal);
3737 StmtResult BuildIfStmt(SourceLocation IfLoc, bool IsConstexpr,
3738 Stmt *InitStmt,
3739 ConditionResult Cond, Stmt *ThenVal,
3740 SourceLocation ElseLoc, Stmt *ElseVal);
3741 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc,
3742 Stmt *InitStmt,
3743 ConditionResult Cond);
3744 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc,
3745 Stmt *Switch, Stmt *Body);
3746 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, ConditionResult Cond,
3747 Stmt *Body);
3748 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body,
3749 SourceLocation WhileLoc, SourceLocation CondLParen,
3750 Expr *Cond, SourceLocation CondRParen);
3751
3752 StmtResult ActOnForStmt(SourceLocation ForLoc,
3753 SourceLocation LParenLoc,
3754 Stmt *First,
3755 ConditionResult Second,
3756 FullExprArg Third,
3757 SourceLocation RParenLoc,
3758 Stmt *Body);
3759 ExprResult CheckObjCForCollectionOperand(SourceLocation forLoc,
3760 Expr *collection);
3761 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc,
3762 Stmt *First, Expr *collection,
3763 SourceLocation RParenLoc);
3764 StmtResult FinishObjCForCollectionStmt(Stmt *ForCollection, Stmt *Body);
3765
3766 enum BuildForRangeKind {
3767 /// Initial building of a for-range statement.
3768 BFRK_Build,
3769 /// Instantiation or recovery rebuild of a for-range statement. Don't
3770 /// attempt any typo-correction.
3771 BFRK_Rebuild,
3772 /// Determining whether a for-range statement could be built. Avoid any
3773 /// unnecessary or irreversible actions.
3774 BFRK_Check
3775 };
3776
3777 StmtResult ActOnCXXForRangeStmt(Scope *S, SourceLocation ForLoc,
3778 SourceLocation CoawaitLoc,
3779 Stmt *LoopVar,
3780 SourceLocation ColonLoc, Expr *Collection,
3781 SourceLocation RParenLoc,
3782 BuildForRangeKind Kind);
3783 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc,
3784 SourceLocation CoawaitLoc,
3785 SourceLocation ColonLoc,
3786 Stmt *RangeDecl, Stmt *Begin, Stmt *End,
3787 Expr *Cond, Expr *Inc,
3788 Stmt *LoopVarDecl,
3789 SourceLocation RParenLoc,
3790 BuildForRangeKind Kind);
3791 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body);
3792
3793 StmtResult ActOnGotoStmt(SourceLocation GotoLoc,
3794 SourceLocation LabelLoc,
3795 LabelDecl *TheDecl);
3796 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc,
3797 SourceLocation StarLoc,
3798 Expr *DestExp);
3799 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope);
3800 StmtResult ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope);
3801
3802 void ActOnCapturedRegionStart(SourceLocation Loc, Scope *CurScope,
3803 CapturedRegionKind Kind, unsigned NumParams);
3804 typedef std::pair<StringRef, QualType> CapturedParamNameType;
3805 void ActOnCapturedRegionStart(SourceLocation Loc, Scope *CurScope,
3806 CapturedRegionKind Kind,
3807 ArrayRef<CapturedParamNameType> Params);
3808 StmtResult ActOnCapturedRegionEnd(Stmt *S);
3809 void ActOnCapturedRegionError();
3810 RecordDecl *CreateCapturedStmtRecordDecl(CapturedDecl *&CD,
3811 SourceLocation Loc,
3812 unsigned NumParams);
3813 VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E,
3814 bool AllowParamOrMoveConstructible);
3815 bool isCopyElisionCandidate(QualType ReturnType, const VarDecl *VD,
3816 bool AllowParamOrMoveConstructible);
3817
3818 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp,
3819 Scope *CurScope);
3820 StmtResult BuildReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp);
3821 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp);
3822
3823 StmtResult ActOnGCCAsmStmt(SourceLocation AsmLoc, bool IsSimple,
3824 bool IsVolatile, unsigned NumOutputs,
3825 unsigned NumInputs, IdentifierInfo **Names,
3826 MultiExprArg Constraints, MultiExprArg Exprs,
3827 Expr *AsmString, MultiExprArg Clobbers,
3828 SourceLocation RParenLoc);
3829
3830 void FillInlineAsmIdentifierInfo(Expr *Res,
3831 llvm::InlineAsmIdentifierInfo &Info);
3832 ExprResult LookupInlineAsmIdentifier(CXXScopeSpec &SS,
3833 SourceLocation TemplateKWLoc,
3834 UnqualifiedId &Id,
3835 bool IsUnevaluatedContext);
3836 bool LookupInlineAsmField(StringRef Base, StringRef Member,
3837 unsigned &Offset, SourceLocation AsmLoc);
3838 ExprResult LookupInlineAsmVarDeclField(Expr *RefExpr, StringRef Member,
3839 SourceLocation AsmLoc);
3840 StmtResult ActOnMSAsmStmt(SourceLocation AsmLoc, SourceLocation LBraceLoc,
3841 ArrayRef<Token> AsmToks,
3842 StringRef AsmString,
3843 unsigned NumOutputs, unsigned NumInputs,
3844 ArrayRef<StringRef> Constraints,
3845 ArrayRef<StringRef> Clobbers,
3846 ArrayRef<Expr*> Exprs,
3847 SourceLocation EndLoc);
3848 LabelDecl *GetOrCreateMSAsmLabel(StringRef ExternalLabelName,
3849 SourceLocation Location,
3850 bool AlwaysCreate);
3851
3852 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType,
3853 SourceLocation StartLoc,
3854 SourceLocation IdLoc, IdentifierInfo *Id,
3855 bool Invalid = false);
3856
3857 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D);
3858
3859 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen,
3860 Decl *Parm, Stmt *Body);
3861
3862 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body);
3863
3864 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try,
3865 MultiStmtArg Catch, Stmt *Finally);
3866
3867 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw);
3868 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw,
3869 Scope *CurScope);
3870 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc,
3871 Expr *operand);
3872 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc,
3873 Expr *SynchExpr,
3874 Stmt *SynchBody);
3875
3876 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body);
3877
3878 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo,
3879 SourceLocation StartLoc,
3880 SourceLocation IdLoc,
3881 IdentifierInfo *Id);
3882
3883 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D);
3884
3885 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc,
3886 Decl *ExDecl, Stmt *HandlerBlock);
3887 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock,
3888 ArrayRef<Stmt *> Handlers);
3889
3890 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ?
3891 SourceLocation TryLoc, Stmt *TryBlock,
3892 Stmt *Handler);
3893 StmtResult ActOnSEHExceptBlock(SourceLocation Loc,
3894 Expr *FilterExpr,
3895 Stmt *Block);
3896 void ActOnStartSEHFinallyBlock();
3897 void ActOnAbortSEHFinallyBlock();
3898 StmtResult ActOnFinishSEHFinallyBlock(SourceLocation Loc, Stmt *Block);
3899 StmtResult ActOnSEHLeaveStmt(SourceLocation Loc, Scope *CurScope);
3900
3901 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock);
3902
3903 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const;
3904
3905 /// \brief If it's a file scoped decl that must warn if not used, keep track
3906 /// of it.
3907 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D);
3908
3909 /// DiagnoseUnusedExprResult - If the statement passed in is an expression
3910 /// whose result is unused, warn.
3911 void DiagnoseUnusedExprResult(const Stmt *S);
3912 void DiagnoseUnusedNestedTypedefs(const RecordDecl *D);
3913 void DiagnoseUnusedDecl(const NamedDecl *ND);
3914
3915 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null
3916 /// statement as a \p Body, and it is located on the same line.
3917 ///
3918 /// This helps prevent bugs due to typos, such as:
3919 /// if (condition);
3920 /// do_stuff();
3921 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc,
3922 const Stmt *Body,
3923 unsigned DiagID);
3924
3925 /// Warn if a for/while loop statement \p S, which is followed by
3926 /// \p PossibleBody, has a suspicious null statement as a body.
3927 void DiagnoseEmptyLoopBody(const Stmt *S,
3928 const Stmt *PossibleBody);
3929
3930 /// Warn if a value is moved to itself.
3931 void DiagnoseSelfMove(const Expr *LHSExpr, const Expr *RHSExpr,
3932 SourceLocation OpLoc);
3933
3934 /// \brief Warn if we're implicitly casting from a _Nullable pointer type to a
3935 /// _Nonnull one.
3936 void diagnoseNullableToNonnullConversion(QualType DstType, QualType SrcType,
3937 SourceLocation Loc);
3938
3939 /// Warn when implicitly casting 0 to nullptr.
3940 void diagnoseZeroToNullptrConversion(CastKind Kind, const Expr *E);
3941
3942 ParsingDeclState PushParsingDeclaration(sema::DelayedDiagnosticPool &pool) {
3943 return DelayedDiagnostics.push(pool);
3944 }
3945 void PopParsingDeclaration(ParsingDeclState state, Decl *decl);
3946
3947 typedef ProcessingContextState ParsingClassState;
3948 ParsingClassState PushParsingClass() {
3949 return DelayedDiagnostics.pushUndelayed();
3950 }
3951 void PopParsingClass(ParsingClassState state) {
3952 DelayedDiagnostics.popUndelayed(state);
3953 }
3954
3955 void redelayDiagnostics(sema::DelayedDiagnosticPool &pool);
3956
3957 void DiagnoseAvailabilityOfDecl(NamedDecl *D, SourceLocation Loc,
3958 const ObjCInterfaceDecl *UnknownObjCClass,
3959 bool ObjCPropertyAccess,
3960 bool AvoidPartialAvailabilityChecks = false);
3961
3962 bool makeUnavailableInSystemHeader(SourceLocation loc,
3963 UnavailableAttr::ImplicitReason reason);
3964
3965 /// \brief Issue any -Wunguarded-availability warnings in \c FD
3966 void DiagnoseUnguardedAvailabilityViolations(Decl *FD);
3967
3968 //===--------------------------------------------------------------------===//
3969 // Expression Parsing Callbacks: SemaExpr.cpp.
3970
3971 bool CanUseDecl(NamedDecl *D, bool TreatUnavailableAsInvalid);
3972 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc,
3973 const ObjCInterfaceDecl *UnknownObjCClass = nullptr,
3974 bool ObjCPropertyAccess = false,
3975 bool AvoidPartialAvailabilityChecks = false);
3976 void NoteDeletedFunction(FunctionDecl *FD);
3977 void NoteDeletedInheritingConstructor(CXXConstructorDecl *CD);
3978 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD);
3979 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD,
3980 ObjCMethodDecl *Getter,
3981 SourceLocation Loc);
3982 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc,
3983 ArrayRef<Expr *> Args);
3984
3985 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext,
3986 Decl *LambdaContextDecl = nullptr,
3987 bool IsDecltype = false);
3988 enum ReuseLambdaContextDecl_t { ReuseLambdaContextDecl };
3989 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext,
3990 ReuseLambdaContextDecl_t,
3991 bool IsDecltype = false);
3992 void PopExpressionEvaluationContext();
3993
3994 void DiscardCleanupsInEvaluationContext();
3995
3996 ExprResult TransformToPotentiallyEvaluated(Expr *E);
3997 ExprResult HandleExprEvaluationContextForTypeof(Expr *E);
3998
3999 ExprResult ActOnConstantExpression(ExprResult Res);
4000
4001 // Functions for marking a declaration referenced. These functions also
4002 // contain the relevant logic for marking if a reference to a function or
4003 // variable is an odr-use (in the C++11 sense). There are separate variants
4004 // for expressions referring to a decl; these exist because odr-use marking
4005 // needs to be delayed for some constant variables when we build one of the
4006 // named expressions.
4007 //
4008 // MightBeOdrUse indicates whether the use could possibly be an odr-use, and
4009 // should usually be true. This only needs to be set to false if the lack of
4010 // odr-use cannot be determined from the current context (for instance,
4011 // because the name denotes a virtual function and was written without an
4012 // explicit nested-name-specifier).
4013 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D, bool MightBeOdrUse);
4014 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func,
4015 bool MightBeOdrUse = true);
4016 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var);
4017 void MarkDeclRefReferenced(DeclRefExpr *E, const Expr *Base = nullptr);
4018 void MarkMemberReferenced(MemberExpr *E);
4019
4020 void UpdateMarkingForLValueToRValue(Expr *E);
4021 void CleanupVarDeclMarking();
4022
4023 enum TryCaptureKind {
4024 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef
4025 };
4026
4027 /// \brief Try to capture the given variable.
4028 ///
4029 /// \param Var The variable to capture.
4030 ///
4031 /// \param Loc The location at which the capture occurs.
4032 ///
4033 /// \param Kind The kind of capture, which may be implicit (for either a
4034 /// block or a lambda), or explicit by-value or by-reference (for a lambda).
4035 ///
4036 /// \param EllipsisLoc The location of the ellipsis, if one is provided in
4037 /// an explicit lambda capture.
4038 ///
4039 /// \param BuildAndDiagnose Whether we are actually supposed to add the
4040 /// captures or diagnose errors. If false, this routine merely check whether
4041 /// the capture can occur without performing the capture itself or complaining
4042 /// if the variable cannot be captured.
4043 ///
4044 /// \param CaptureType Will be set to the type of the field used to capture
4045 /// this variable in the innermost block or lambda. Only valid when the
4046 /// variable can be captured.
4047 ///
4048 /// \param DeclRefType Will be set to the type of a reference to the capture
4049 /// from within the current scope. Only valid when the variable can be
4050 /// captured.
4051 ///
4052 /// \param FunctionScopeIndexToStopAt If non-null, it points to the index
4053 /// of the FunctionScopeInfo stack beyond which we do not attempt to capture.
4054 /// This is useful when enclosing lambdas must speculatively capture
4055 /// variables that may or may not be used in certain specializations of
4056 /// a nested generic lambda.
4057 ///
4058 /// \returns true if an error occurred (i.e., the variable cannot be
4059 /// captured) and false if the capture succeeded.
4060 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind,
4061 SourceLocation EllipsisLoc, bool BuildAndDiagnose,
4062 QualType &CaptureType,
4063 QualType &DeclRefType,
4064 const unsigned *const FunctionScopeIndexToStopAt);
4065
4066 /// \brief Try to capture the given variable.
4067 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc,
4068 TryCaptureKind Kind = TryCapture_Implicit,
4069 SourceLocation EllipsisLoc = SourceLocation());
4070
4071 /// \brief Checks if the variable must be captured.
4072 bool NeedToCaptureVariable(VarDecl *Var, SourceLocation Loc);
4073
4074 /// \brief Given a variable, determine the type that a reference to that
4075 /// variable will have in the given scope.
4076 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc);
4077
4078 /// Mark all of the declarations referenced within a particular AST node as
4079 /// referenced. Used when template instantiation instantiates a non-dependent
4080 /// type -- entities referenced by the type are now referenced.
4081 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T);
4082 void MarkDeclarationsReferencedInExpr(Expr *E,
4083 bool SkipLocalVariables = false);
4084
4085 /// \brief Try to recover by turning the given expression into a
4086 /// call. Returns true if recovery was attempted or an error was
4087 /// emitted; this may also leave the ExprResult invalid.
4088 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD,
4089 bool ForceComplain = false,
4090 bool (*IsPlausibleResult)(QualType) = nullptr);
4091
4092 /// \brief Figure out if an expression could be turned into a call.
4093 bool tryExprAsCall(Expr &E, QualType &ZeroArgCallReturnTy,
4094 UnresolvedSetImpl &NonTemplateOverloads);
4095
4096 /// \brief Conditionally issue a diagnostic based on the current
4097 /// evaluation context.
4098 ///
4099 /// \param Statement If Statement is non-null, delay reporting the
4100 /// diagnostic until the function body is parsed, and then do a basic
4101 /// reachability analysis to determine if the statement is reachable.
4102 /// If it is unreachable, the diagnostic will not be emitted.
4103 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement,
4104 const PartialDiagnostic &PD);
4105
4106 // Primary Expressions.
4107 SourceRange getExprRange(Expr *E) const;
4108
4109 ExprResult ActOnIdExpression(
4110 Scope *S, CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
4111 UnqualifiedId &Id, bool HasTrailingLParen, bool IsAddressOfOperand,
4112 std::unique_ptr<CorrectionCandidateCallback> CCC = nullptr,
4113 bool IsInlineAsmIdentifier = false, Token *KeywordReplacement = nullptr);
4114
4115 void DecomposeUnqualifiedId(const UnqualifiedId &Id,
4116 TemplateArgumentListInfo &Buffer,
4117 DeclarationNameInfo &NameInfo,
4118 const TemplateArgumentListInfo *&TemplateArgs);
4119
4120 bool
4121 DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R,
4122 std::unique_ptr<CorrectionCandidateCallback> CCC,
4123 TemplateArgumentListInfo *ExplicitTemplateArgs = nullptr,
4124 ArrayRef<Expr *> Args = None, TypoExpr **Out = nullptr);
4125
4126 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S,
4127 IdentifierInfo *II,
4128 bool AllowBuiltinCreation=false);
4129
4130 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS,
4131 SourceLocation TemplateKWLoc,
4132 const DeclarationNameInfo &NameInfo,
4133 bool isAddressOfOperand,
4134 const TemplateArgumentListInfo *TemplateArgs);
4135
4136 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty,
4137 ExprValueKind VK,
4138 SourceLocation Loc,
4139 const CXXScopeSpec *SS = nullptr);
4140 ExprResult
4141 BuildDeclRefExpr(ValueDecl *D, QualType Ty, ExprValueKind VK,
4142 const DeclarationNameInfo &NameInfo,
4143 const CXXScopeSpec *SS = nullptr,
4144 NamedDecl *FoundD = nullptr,
4145 const TemplateArgumentListInfo *TemplateArgs = nullptr);
4146 ExprResult
4147 BuildAnonymousStructUnionMemberReference(
4148 const CXXScopeSpec &SS,
4149 SourceLocation nameLoc,
4150 IndirectFieldDecl *indirectField,
4151 DeclAccessPair FoundDecl = DeclAccessPair::make(nullptr, AS_none),
4152 Expr *baseObjectExpr = nullptr,
4153 SourceLocation opLoc = SourceLocation());
4154
4155 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS,
4156 SourceLocation TemplateKWLoc,
4157 LookupResult &R,
4158 const TemplateArgumentListInfo *TemplateArgs,
4159 const Scope *S);
4160 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS,
4161 SourceLocation TemplateKWLoc,
4162 LookupResult &R,
4163 const TemplateArgumentListInfo *TemplateArgs,
4164 bool IsDefiniteInstance,
4165 const Scope *S);
4166 bool UseArgumentDependentLookup(const CXXScopeSpec &SS,
4167 const LookupResult &R,
4168 bool HasTrailingLParen);
4169
4170 ExprResult
4171 BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS,
4172 const DeclarationNameInfo &NameInfo,
4173 bool IsAddressOfOperand, const Scope *S,
4174 TypeSourceInfo **RecoveryTSI = nullptr);
4175
4176 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS,
4177 SourceLocation TemplateKWLoc,
4178 const DeclarationNameInfo &NameInfo,
4179 const TemplateArgumentListInfo *TemplateArgs);
4180
4181 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS,
4182 LookupResult &R,
4183 bool NeedsADL,
4184 bool AcceptInvalidDecl = false);
4185 ExprResult BuildDeclarationNameExpr(
4186 const CXXScopeSpec &SS, const DeclarationNameInfo &NameInfo, NamedDecl *D,
4187 NamedDecl *FoundD = nullptr,
4188 const TemplateArgumentListInfo *TemplateArgs = nullptr,
4189 bool AcceptInvalidDecl = false);
4190
4191 ExprResult BuildLiteralOperatorCall(LookupResult &R,
4192 DeclarationNameInfo &SuffixInfo,
4193 ArrayRef<Expr *> Args,
4194 SourceLocation LitEndLoc,
4195 TemplateArgumentListInfo *ExplicitTemplateArgs = nullptr);
4196
4197 ExprResult BuildPredefinedExpr(SourceLocation Loc,
4198 PredefinedExpr::IdentType IT);
4199 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind);
4200 ExprResult ActOnIntegerConstant(SourceLocation Loc, uint64_t Val);
4201
4202 bool CheckLoopHintExpr(Expr *E, SourceLocation Loc);
4203
4204 ExprResult ActOnNumericConstant(const Token &Tok, Scope *UDLScope = nullptr);
4205 ExprResult ActOnCharacterConstant(const Token &Tok,
4206 Scope *UDLScope = nullptr);
4207 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E);
4208 ExprResult ActOnParenListExpr(SourceLocation L,
4209 SourceLocation R,
4210 MultiExprArg Val);
4211
4212 /// ActOnStringLiteral - The specified tokens were lexed as pasted string
4213 /// fragments (e.g. "foo" "bar" L"baz").
4214 ExprResult ActOnStringLiteral(ArrayRef<Token> StringToks,
4215 Scope *UDLScope = nullptr);
4216
4217 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc,
4218 SourceLocation DefaultLoc,
4219 SourceLocation RParenLoc,
4220 Expr *ControllingExpr,
4221 ArrayRef<ParsedType> ArgTypes,
4222 ArrayRef<Expr *> ArgExprs);
4223 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc,
4224 SourceLocation DefaultLoc,
4225 SourceLocation RParenLoc,
4226 Expr *ControllingExpr,
4227 ArrayRef<TypeSourceInfo *> Types,
4228 ArrayRef<Expr *> Exprs);
4229
4230 // Binary/Unary Operators. 'Tok' is the token for the operator.
4231 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc,
4232 Expr *InputExpr);
4233 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc,
4234 UnaryOperatorKind Opc, Expr *Input);
4235 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc,
4236 tok::TokenKind Op, Expr *Input);
4237
4238 QualType CheckAddressOfOperand(ExprResult &Operand, SourceLocation OpLoc);
4239
4240 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo,
4241 SourceLocation OpLoc,
4242 UnaryExprOrTypeTrait ExprKind,
4243 SourceRange R);
4244 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc,
4245 UnaryExprOrTypeTrait ExprKind);
4246 ExprResult
4247 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc,
4248 UnaryExprOrTypeTrait ExprKind,
4249 bool IsType, void *TyOrEx,
4250 SourceRange ArgRange);
4251
4252 ExprResult CheckPlaceholderExpr(Expr *E);
4253 bool CheckVecStepExpr(Expr *E);
4254
4255 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind);
4256 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc,
4257 SourceRange ExprRange,
4258 UnaryExprOrTypeTrait ExprKind);
4259 ExprResult ActOnSizeofParameterPackExpr(Scope *S,
4260 SourceLocation OpLoc,
4261 IdentifierInfo &Name,
4262 SourceLocation NameLoc,
4263 SourceLocation RParenLoc);
4264 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc,
4265 tok::TokenKind Kind, Expr *Input);
4266
4267 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc,
4268 Expr *Idx, SourceLocation RLoc);
4269 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc,
4270 Expr *Idx, SourceLocation RLoc);
4271 ExprResult ActOnOMPArraySectionExpr(Expr *Base, SourceLocation LBLoc,
4272 Expr *LowerBound, SourceLocation ColonLoc,
4273 Expr *Length, SourceLocation RBLoc);
4274
4275 // This struct is for use by ActOnMemberAccess to allow
4276 // BuildMemberReferenceExpr to be able to reinvoke ActOnMemberAccess after
4277 // changing the access operator from a '.' to a '->' (to see if that is the
4278 // change needed to fix an error about an unknown member, e.g. when the class
4279 // defines a custom operator->).
4280 struct ActOnMemberAccessExtraArgs {
4281 Scope *S;
4282 UnqualifiedId &Id;
4283 Decl *ObjCImpDecl;
4284 };
4285
4286 ExprResult BuildMemberReferenceExpr(
4287 Expr *Base, QualType BaseType, SourceLocation OpLoc, bool IsArrow,
4288 CXXScopeSpec &SS, SourceLocation TemplateKWLoc,
4289 NamedDecl *FirstQualifierInScope, const DeclarationNameInfo &NameInfo,
4290 const TemplateArgumentListInfo *TemplateArgs,
4291 const Scope *S,
4292 ActOnMemberAccessExtraArgs *ExtraArgs = nullptr);
4293
4294 ExprResult
4295 BuildMemberReferenceExpr(Expr *Base, QualType BaseType, SourceLocation OpLoc,
4296 bool IsArrow, const CXXScopeSpec &SS,
4297 SourceLocation TemplateKWLoc,
4298 NamedDecl *FirstQualifierInScope, LookupResult &R,
4299 const TemplateArgumentListInfo *TemplateArgs,
4300 const Scope *S,
4301 bool SuppressQualifierCheck = false,
4302 ActOnMemberAccessExtraArgs *ExtraArgs = nullptr);
4303
4304 ExprResult BuildFieldReferenceExpr(Expr *BaseExpr, bool IsArrow,
4305 SourceLocation OpLoc,
4306 const CXXScopeSpec &SS, FieldDecl *Field,
4307 DeclAccessPair FoundDecl,
4308 const DeclarationNameInfo &MemberNameInfo);
4309
4310 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow);
4311
4312 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType,
4313 const CXXScopeSpec &SS,
4314 const LookupResult &R);
4315
4316 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType,
4317 bool IsArrow, SourceLocation OpLoc,
4318 const CXXScopeSpec &SS,
4319 SourceLocation TemplateKWLoc,
4320 NamedDecl *FirstQualifierInScope,
4321 const DeclarationNameInfo &NameInfo,
4322 const TemplateArgumentListInfo *TemplateArgs);
4323
4324 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base,
4325 SourceLocation OpLoc,
4326 tok::TokenKind OpKind,
4327 CXXScopeSpec &SS,
4328 SourceLocation TemplateKWLoc,
4329 UnqualifiedId &Member,
4330 Decl *ObjCImpDecl);
4331
4332 void ActOnDefaultCtorInitializers(Decl *CDtorDecl);
4333 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn,
4334 FunctionDecl *FDecl,
4335 const FunctionProtoType *Proto,
4336 ArrayRef<Expr *> Args,
4337 SourceLocation RParenLoc,
4338 bool ExecConfig = false);
4339 void CheckStaticArrayArgument(SourceLocation CallLoc,
4340 ParmVarDecl *Param,
4341 const Expr *ArgExpr);
4342
4343 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments.
4344 /// This provides the location of the left/right parens and a list of comma
4345 /// locations.
4346 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc,
4347 MultiExprArg ArgExprs, SourceLocation RParenLoc,
4348 Expr *ExecConfig = nullptr,
4349 bool IsExecConfig = false);
4350 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl,
4351 SourceLocation LParenLoc,
4352 ArrayRef<Expr *> Arg,
4353 SourceLocation RParenLoc,
4354 Expr *Config = nullptr,
4355 bool IsExecConfig = false);
4356
4357 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc,
4358 MultiExprArg ExecConfig,
4359 SourceLocation GGGLoc);
4360
4361 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc,
4362 Declarator &D, ParsedType &Ty,
4363 SourceLocation RParenLoc, Expr *CastExpr);
4364 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc,
4365 TypeSourceInfo *Ty,
4366 SourceLocation RParenLoc,
4367 Expr *Op);
4368 CastKind PrepareScalarCast(ExprResult &src, QualType destType);
4369
4370 /// \brief Build an altivec or OpenCL literal.
4371 ExprResult BuildVectorLiteral(SourceLocation LParenLoc,
4372 SourceLocation RParenLoc, Expr *E,
4373 TypeSourceInfo *TInfo);
4374
4375 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME);
4376
4377 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc,
4378 ParsedType Ty,
4379 SourceLocation RParenLoc,
4380 Expr *InitExpr);
4381
4382 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc,
4383 TypeSourceInfo *TInfo,
4384 SourceLocation RParenLoc,
4385 Expr *LiteralExpr);
4386
4387 ExprResult ActOnInitList(SourceLocation LBraceLoc,
4388 MultiExprArg InitArgList,
4389 SourceLocation RBraceLoc);
4390
4391 ExprResult ActOnDesignatedInitializer(Designation &Desig,
4392 SourceLocation Loc,
4393 bool GNUSyntax,
4394 ExprResult Init);
4395
4396private:
4397 static BinaryOperatorKind ConvertTokenKindToBinaryOpcode(tok::TokenKind Kind);
4398
4399public:
4400 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc,
4401 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr);
4402 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc,
4403 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr);
4404 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc,
4405 Expr *LHSExpr, Expr *RHSExpr);
4406
4407 void DiagnoseCommaOperator(const Expr *LHS, SourceLocation Loc);
4408
4409 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null
4410 /// in the case of a the GNU conditional expr extension.
4411 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc,
4412 SourceLocation ColonLoc,
4413 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr);
4414
4415 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo".
4416 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc,
4417 LabelDecl *TheDecl);
4418
4419 void ActOnStartStmtExpr();
4420 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt,
4421 SourceLocation RPLoc); // "({..})"
4422 void ActOnStmtExprError();
4423
4424 // __builtin_offsetof(type, identifier(.identifier|[expr])*)
4425 struct OffsetOfComponent {
4426 SourceLocation LocStart, LocEnd;
4427 bool isBrackets; // true if [expr], false if .ident
4428 union {
4429 IdentifierInfo *IdentInfo;
4430 Expr *E;
4431 } U;
4432 };
4433
4434 /// __builtin_offsetof(type, a.b[123][456].c)
4435 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc,
4436 TypeSourceInfo *TInfo,
4437 ArrayRef<OffsetOfComponent> Components,
4438 SourceLocation RParenLoc);
4439 ExprResult ActOnBuiltinOffsetOf(Scope *S,
4440 SourceLocation BuiltinLoc,
4441 SourceLocation TypeLoc,
4442 ParsedType ParsedArgTy,
4443 ArrayRef<OffsetOfComponent> Components,
4444 SourceLocation RParenLoc);
4445
4446 // __builtin_choose_expr(constExpr, expr1, expr2)
4447 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc,
4448 Expr *CondExpr, Expr *LHSExpr,
4449 Expr *RHSExpr, SourceLocation RPLoc);
4450
4451 // __builtin_va_arg(expr, type)
4452 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty,
4453 SourceLocation RPLoc);
4454 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E,
4455 TypeSourceInfo *TInfo, SourceLocation RPLoc);
4456
4457 // __null
4458 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc);
4459
4460 bool CheckCaseExpression(Expr *E);
4461
4462 /// \brief Describes the result of an "if-exists" condition check.
4463 enum IfExistsResult {
4464 /// \brief The symbol exists.
4465 IER_Exists,
4466
4467 /// \brief The symbol does not exist.
4468 IER_DoesNotExist,
4469
4470 /// \brief The name is a dependent name, so the results will differ
4471 /// from one instantiation to the next.
4472 IER_Dependent,
4473
4474 /// \brief An error occurred.
4475 IER_Error
4476 };
4477
4478 IfExistsResult
4479 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS,
4480 const DeclarationNameInfo &TargetNameInfo);
4481
4482 IfExistsResult
4483 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc,
4484 bool IsIfExists, CXXScopeSpec &SS,
4485 UnqualifiedId &Name);
4486
4487 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc,
4488 bool IsIfExists,
4489 NestedNameSpecifierLoc QualifierLoc,
4490 DeclarationNameInfo NameInfo,
4491 Stmt *Nested);
4492 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc,
4493 bool IsIfExists,
4494 CXXScopeSpec &SS, UnqualifiedId &Name,
4495 Stmt *Nested);
4496
4497 //===------------------------- "Block" Extension ------------------------===//
4498
4499 /// ActOnBlockStart - This callback is invoked when a block literal is
4500 /// started.
4501 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope);
4502
4503 /// ActOnBlockArguments - This callback allows processing of block arguments.
4504 /// If there are no arguments, this is still invoked.
4505 void ActOnBlockArguments(SourceLocation CaretLoc, Declarator &ParamInfo,
4506 Scope *CurScope);
4507
4508 /// ActOnBlockError - If there is an error parsing a block, this callback
4509 /// is invoked to pop the information about the block from the action impl.
4510 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope);
4511
4512 /// ActOnBlockStmtExpr - This is called when the body of a block statement
4513 /// literal was successfully completed. ^(int x){...}
4514 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body,
4515 Scope *CurScope);
4516
4517 //===---------------------------- Clang Extensions ----------------------===//
4518
4519 /// __builtin_convertvector(...)
4520 ExprResult ActOnConvertVectorExpr(Expr *E, ParsedType ParsedDestTy,
4521 SourceLocation BuiltinLoc,
4522 SourceLocation RParenLoc);
4523
4524 //===---------------------------- OpenCL Features -----------------------===//
4525
4526 /// __builtin_astype(...)
4527 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy,
4528 SourceLocation BuiltinLoc,
4529 SourceLocation RParenLoc);
4530
4531 //===---------------------------- C++ Features --------------------------===//
4532
4533 // Act on C++ namespaces
4534 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc,
4535 SourceLocation NamespaceLoc,
4536 SourceLocation IdentLoc,
4537 IdentifierInfo *Ident,
4538 SourceLocation LBrace,
4539 AttributeList *AttrList,
4540 UsingDirectiveDecl * &UsingDecl);
4541 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace);
4542
4543 NamespaceDecl *getStdNamespace() const;
4544 NamespaceDecl *getOrCreateStdNamespace();
4545
4546 NamespaceDecl *lookupStdExperimentalNamespace();
4547
4548 CXXRecordDecl *getStdBadAlloc() const;
4549 EnumDecl *getStdAlignValT() const;
4550
4551 /// \brief Tests whether Ty is an instance of std::initializer_list and, if
4552 /// it is and Element is not NULL, assigns the element type to Element.
4553 bool isStdInitializerList(QualType Ty, QualType *Element);
4554
4555 /// \brief Looks for the std::initializer_list template and instantiates it
4556 /// with Element, or emits an error if it's not found.
4557 ///
4558 /// \returns The instantiated template, or null on error.
4559 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc);
4560
4561 /// \brief Determine whether Ctor is an initializer-list constructor, as
4562 /// defined in [dcl.init.list]p2.
4563 bool isInitListConstructor(const FunctionDecl *Ctor);
4564
4565 Decl *ActOnUsingDirective(Scope *CurScope,
4566 SourceLocation UsingLoc,
4567 SourceLocation NamespcLoc,
4568 CXXScopeSpec &SS,
4569 SourceLocation IdentLoc,
4570 IdentifierInfo *NamespcName,
4571 AttributeList *AttrList);
4572
4573 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir);
4574
4575 Decl *ActOnNamespaceAliasDef(Scope *CurScope,
4576 SourceLocation NamespaceLoc,
4577 SourceLocation AliasLoc,
4578 IdentifierInfo *Alias,
4579 CXXScopeSpec &SS,
4580 SourceLocation IdentLoc,
4581 IdentifierInfo *Ident);
4582
4583 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow);
4584 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target,
4585 const LookupResult &PreviousDecls,
4586 UsingShadowDecl *&PrevShadow);
4587 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD,
4588 NamedDecl *Target,
4589 UsingShadowDecl *PrevDecl);
4590
4591 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc,
4592 bool HasTypenameKeyword,
4593 const CXXScopeSpec &SS,
4594 SourceLocation NameLoc,
4595 const LookupResult &Previous);
4596 bool CheckUsingDeclQualifier(SourceLocation UsingLoc,
4597 bool HasTypename,
4598 const CXXScopeSpec &SS,
4599 const DeclarationNameInfo &NameInfo,
4600 SourceLocation NameLoc);
4601
4602 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS,
4603 SourceLocation UsingLoc,
4604 bool HasTypenameKeyword,
4605 SourceLocation TypenameLoc,
4606 CXXScopeSpec &SS,
4607 DeclarationNameInfo NameInfo,
4608 SourceLocation EllipsisLoc,
4609 AttributeList *AttrList,
4610 bool IsInstantiation);
4611 NamedDecl *BuildUsingPackDecl(NamedDecl *InstantiatedFrom,
4612 ArrayRef<NamedDecl *> Expansions);
4613
4614 bool CheckInheritingConstructorUsingDecl(UsingDecl *UD);
4615
4616 /// Given a derived-class using shadow declaration for a constructor and the
4617 /// correspnding base class constructor, find or create the implicit
4618 /// synthesized derived class constructor to use for this initialization.
4619 CXXConstructorDecl *
4620 findInheritingConstructor(SourceLocation Loc, CXXConstructorDecl *BaseCtor,
4621 ConstructorUsingShadowDecl *DerivedShadow);
4622
4623 Decl *ActOnUsingDeclaration(Scope *CurScope,
4624 AccessSpecifier AS,
4625 SourceLocation UsingLoc,
4626 SourceLocation TypenameLoc,
4627 CXXScopeSpec &SS,
4628 UnqualifiedId &Name,
4629 SourceLocation EllipsisLoc,
4630 AttributeList *AttrList);
4631 Decl *ActOnAliasDeclaration(Scope *CurScope,
4632 AccessSpecifier AS,
4633 MultiTemplateParamsArg TemplateParams,
4634 SourceLocation UsingLoc,
4635 UnqualifiedId &Name,
4636 AttributeList *AttrList,
4637 TypeResult Type,
4638 Decl *DeclFromDeclSpec);
4639
4640 /// BuildCXXConstructExpr - Creates a complete call to a constructor,
4641 /// including handling of its default argument expressions.
4642 ///
4643 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind
4644 ExprResult
4645 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
4646 NamedDecl *FoundDecl,
4647 CXXConstructorDecl *Constructor, MultiExprArg Exprs,
4648 bool HadMultipleCandidates, bool IsListInitialization,
4649 bool IsStdInitListInitialization,
4650 bool RequiresZeroInit, unsigned ConstructKind,
4651 SourceRange ParenRange);
4652
4653 /// Build a CXXConstructExpr whose constructor has already been resolved if
4654 /// it denotes an inherited constructor.
4655 ExprResult
4656 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
4657 CXXConstructorDecl *Constructor, bool Elidable,
4658 MultiExprArg Exprs,
4659 bool HadMultipleCandidates, bool IsListInitialization,
4660 bool IsStdInitListInitialization,
4661 bool RequiresZeroInit, unsigned ConstructKind,
4662 SourceRange ParenRange);
4663
4664 // FIXME: Can we remove this and have the above BuildCXXConstructExpr check if
4665 // the constructor can be elidable?
4666 ExprResult
4667 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
4668 NamedDecl *FoundDecl,
4669 CXXConstructorDecl *Constructor, bool Elidable,
4670 MultiExprArg Exprs, bool HadMultipleCandidates,
4671 bool IsListInitialization,
4672 bool IsStdInitListInitialization, bool RequiresZeroInit,
4673 unsigned ConstructKind, SourceRange ParenRange);
4674
4675 ExprResult BuildCXXDefaultInitExpr(SourceLocation Loc, FieldDecl *Field);
4676
4677
4678 /// Instantiate or parse a C++ default argument expression as necessary.
4679 /// Return true on error.
4680 bool CheckCXXDefaultArgExpr(SourceLocation CallLoc, FunctionDecl *FD,
4681 ParmVarDecl *Param);
4682
4683 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating
4684 /// the default expr if needed.
4685 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc,
4686 FunctionDecl *FD,
4687 ParmVarDecl *Param);
4688
4689 /// FinalizeVarWithDestructor - Prepare for calling destructor on the
4690 /// constructed variable.
4691 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType);
4692
4693 /// \brief Helper class that collects exception specifications for
4694 /// implicitly-declared special member functions.
4695 class ImplicitExceptionSpecification {
4696 // Pointer to allow copying
4697 Sema *Self;
4698 // We order exception specifications thus:
4699 // noexcept is the most restrictive, but is only used in C++11.
4700 // throw() comes next.
4701 // Then a throw(collected exceptions)
4702 // Finally no specification, which is expressed as noexcept(false).
4703 // throw(...) is used instead if any called function uses it.
4704 ExceptionSpecificationType ComputedEST;
4705 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen;
4706 SmallVector<QualType, 4> Exceptions;
4707
4708 void ClearExceptions() {
4709 ExceptionsSeen.clear();
4710 Exceptions.clear();
4711 }
4712
4713 public:
4714 explicit ImplicitExceptionSpecification(Sema &Self)
4715 : Self(&Self), ComputedEST(EST_BasicNoexcept) {
4716 if (!Self.getLangOpts().CPlusPlus11)
4717 ComputedEST = EST_DynamicNone;
4718 }
4719
4720 /// \brief Get the computed exception specification type.
4721 ExceptionSpecificationType getExceptionSpecType() const {
4722 assert(ComputedEST != EST_ComputedNoexcept &&(static_cast <bool> (ComputedEST != EST_ComputedNoexcept
&& "noexcept(expr) should not be a possible result")
? void (0) : __assert_fail ("ComputedEST != EST_ComputedNoexcept && \"noexcept(expr) should not be a possible result\""
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 4723, __extension__ __PRETTY_FUNCTION__))
4723 "noexcept(expr) should not be a possible result")(static_cast <bool> (ComputedEST != EST_ComputedNoexcept
&& "noexcept(expr) should not be a possible result")
? void (0) : __assert_fail ("ComputedEST != EST_ComputedNoexcept && \"noexcept(expr) should not be a possible result\""
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include/clang/Sema/Sema.h"
, 4723, __extension__ __PRETTY_FUNCTION__))
;
4724 return ComputedEST;
4725 }
4726
4727 /// \brief The number of exceptions in the exception specification.
4728 unsigned size() const { return Exceptions.size(); }
4729
4730 /// \brief The set of exceptions in the exception specification.
4731 const QualType *data() const { return Exceptions.data(); }
4732
4733 /// \brief Integrate another called method into the collected data.
4734 void CalledDecl(SourceLocation CallLoc, const CXXMethodDecl *Method);
4735
4736 /// \brief Integrate an invoked expression into the collected data.
4737 void CalledExpr(Expr *E);
4738
4739 /// \brief Overwrite an EPI's exception specification with this
4740 /// computed exception specification.
4741 FunctionProtoType::ExceptionSpecInfo getExceptionSpec() const {
4742 FunctionProtoType::ExceptionSpecInfo ESI;
4743 ESI.Type = getExceptionSpecType();
4744 if (ESI.Type == EST_Dynamic) {
4745 ESI.Exceptions = Exceptions;
4746 } else if (ESI.Type == EST_None) {
4747 /// C++11 [except.spec]p14:
4748 /// The exception-specification is noexcept(false) if the set of
4749 /// potential exceptions of the special member function contains "any"
4750 ESI.Type = EST_ComputedNoexcept;
4751 ESI.NoexceptExpr = Self->ActOnCXXBoolLiteral(SourceLocation(),
4752 tok::kw_false).get();
4753 }
4754 return ESI;
4755 }
4756 };
4757
4758 /// \brief Determine what sort of exception specification a defaulted
4759 /// copy constructor of a class will have.
4760 ImplicitExceptionSpecification
4761 ComputeDefaultedDefaultCtorExceptionSpec(SourceLocation Loc,
4762 CXXMethodDecl *MD);
4763
4764 /// \brief Determine what sort of exception specification a defaulted
4765 /// default constructor of a class will have, and whether the parameter
4766 /// will be const.
4767 ImplicitExceptionSpecification
4768 ComputeDefaultedCopyCtorExceptionSpec(CXXMethodDecl *MD);
4769
4770 /// \brief Determine what sort of exception specification a defautled
4771 /// copy assignment operator of a class will have, and whether the
4772 /// parameter will be const.
4773 ImplicitExceptionSpecification
4774 ComputeDefaultedCopyAssignmentExceptionSpec(CXXMethodDecl *MD);
4775
4776 /// \brief Determine what sort of exception specification a defaulted move
4777 /// constructor of a class will have.
4778 ImplicitExceptionSpecification
4779 ComputeDefaultedMoveCtorExceptionSpec(CXXMethodDecl *MD);
4780
4781 /// \brief Determine what sort of exception specification a defaulted move
4782 /// assignment operator of a class will have.
4783 ImplicitExceptionSpecification
4784 ComputeDefaultedMoveAssignmentExceptionSpec(CXXMethodDecl *MD);
4785
4786 /// \brief Determine what sort of exception specification a defaulted
4787 /// destructor of a class will have.
4788 ImplicitExceptionSpecification
4789 ComputeDefaultedDtorExceptionSpec(CXXMethodDecl *MD);
4790
4791 /// \brief Determine what sort of exception specification an inheriting
4792 /// constructor of a class will have.
4793 ImplicitExceptionSpecification
4794 ComputeInheritingCtorExceptionSpec(SourceLocation Loc,
4795 CXXConstructorDecl *CD);
4796
4797 /// \brief Evaluate the implicit exception specification for a defaulted
4798 /// special member function.
4799 void EvaluateImplicitExceptionSpec(SourceLocation Loc, CXXMethodDecl *MD);
4800
4801 /// \brief Check the given exception-specification and update the
4802 /// exception specification information with the results.
4803 void checkExceptionSpecification(bool IsTopLevel,
4804 ExceptionSpecificationType EST,
4805 ArrayRef<ParsedType> DynamicExceptions,
4806 ArrayRef<SourceRange> DynamicExceptionRanges,
4807 Expr *NoexceptExpr,
4808 SmallVectorImpl<QualType> &Exceptions,
4809 FunctionProtoType::ExceptionSpecInfo &ESI);
4810
4811 /// \brief Determine if we're in a case where we need to (incorrectly) eagerly
4812 /// parse an exception specification to work around a libstdc++ bug.
4813 bool isLibstdcxxEagerExceptionSpecHack(const Declarator &D);
4814
4815 /// \brief Add an exception-specification to the given member function
4816 /// (or member function template). The exception-specification was parsed
4817 /// after the method itself was declared.
4818 void actOnDelayedExceptionSpecification(Decl *Method,
4819 ExceptionSpecificationType EST,
4820 SourceRange SpecificationRange,
4821 ArrayRef<ParsedType> DynamicExceptions,
4822 ArrayRef<SourceRange> DynamicExceptionRanges,
4823 Expr *NoexceptExpr);
4824
4825 class InheritedConstructorInfo;
4826
4827 /// \brief Determine if a special member function should have a deleted
4828 /// definition when it is defaulted.
4829 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM,
4830 InheritedConstructorInfo *ICI = nullptr,
4831 bool Diagnose = false);
4832
4833 /// \brief Declare the implicit default constructor for the given class.
4834 ///
4835 /// \param ClassDecl The class declaration into which the implicit
4836 /// default constructor will be added.
4837 ///
4838 /// \returns The implicitly-declared default constructor.
4839 CXXConstructorDecl *DeclareImplicitDefaultConstructor(
4840 CXXRecordDecl *ClassDecl);
4841
4842 /// DefineImplicitDefaultConstructor - Checks for feasibility of
4843 /// defining this constructor as the default constructor.
4844 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation,
4845 CXXConstructorDecl *Constructor);
4846
4847 /// \brief Declare the implicit destructor for the given class.
4848 ///
4849 /// \param ClassDecl The class declaration into which the implicit
4850 /// destructor will be added.
4851 ///
4852 /// \returns The implicitly-declared destructor.
4853 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl);
4854
4855 /// DefineImplicitDestructor - Checks for feasibility of
4856 /// defining this destructor as the default destructor.
4857 void DefineImplicitDestructor(SourceLocation CurrentLocation,
4858 CXXDestructorDecl *Destructor);
4859
4860 /// \brief Build an exception spec for destructors that don't have one.
4861 ///
4862 /// C++11 says that user-defined destructors with no exception spec get one
4863 /// that looks as if the destructor was implicitly declared.
4864 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl,
4865 CXXDestructorDecl *Destructor);
4866
4867 /// \brief Define the specified inheriting constructor.
4868 void DefineInheritingConstructor(SourceLocation UseLoc,
4869 CXXConstructorDecl *Constructor);
4870
4871 /// \brief Declare the implicit copy constructor for the given class.
4872 ///
4873 /// \param ClassDecl The class declaration into which the implicit
4874 /// copy constructor will be added.
4875 ///
4876 /// \returns The implicitly-declared copy constructor.
4877 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl);
4878
4879 /// DefineImplicitCopyConstructor - Checks for feasibility of
4880 /// defining this constructor as the copy constructor.
4881 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation,
4882 CXXConstructorDecl *Constructor);
4883
4884 /// \brief Declare the implicit move constructor for the given class.
4885 ///
4886 /// \param ClassDecl The Class declaration into which the implicit
4887 /// move constructor will be added.
4888 ///
4889 /// \returns The implicitly-declared move constructor, or NULL if it wasn't
4890 /// declared.
4891 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl);
4892
4893 /// DefineImplicitMoveConstructor - Checks for feasibility of
4894 /// defining this constructor as the move constructor.
4895 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation,
4896 CXXConstructorDecl *Constructor);
4897
4898 /// \brief Declare the implicit copy assignment operator for the given class.
4899 ///
4900 /// \param ClassDecl The class declaration into which the implicit
4901 /// copy assignment operator will be added.
4902 ///
4903 /// \returns The implicitly-declared copy assignment operator.
4904 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl);
4905
4906 /// \brief Defines an implicitly-declared copy assignment operator.
4907 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation,
4908 CXXMethodDecl *MethodDecl);
4909
4910 /// \brief Declare the implicit move assignment operator for the given class.
4911 ///
4912 /// \param ClassDecl The Class declaration into which the implicit
4913 /// move assignment operator will be added.
4914 ///
4915 /// \returns The implicitly-declared move assignment operator, or NULL if it
4916 /// wasn't declared.
4917 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl);
4918
4919 /// \brief Defines an implicitly-declared move assignment operator.
4920 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation,
4921 CXXMethodDecl *MethodDecl);
4922
4923 /// \brief Force the declaration of any implicitly-declared members of this
4924 /// class.
4925 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class);
4926
4927 /// \brief Check a completed declaration of an implicit special member.
4928 void CheckImplicitSpecialMemberDeclaration(Scope *S, FunctionDecl *FD);
4929
4930 /// \brief Determine whether the given function is an implicitly-deleted
4931 /// special member function.
4932 bool isImplicitlyDeleted(FunctionDecl *FD);
4933
4934 /// \brief Check whether 'this' shows up in the type of a static member
4935 /// function after the (naturally empty) cv-qualifier-seq would be.
4936 ///
4937 /// \returns true if an error occurred.
4938 bool checkThisInStaticMemberFunctionType(CXXMethodDecl *Method);
4939
4940 /// \brief Whether this' shows up in the exception specification of a static
4941 /// member function.
4942 bool checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method);
4943
4944 /// \brief Check whether 'this' shows up in the attributes of the given
4945 /// static member function.
4946 ///
4947 /// \returns true if an error occurred.
4948 bool checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method);
4949
4950 /// MaybeBindToTemporary - If the passed in expression has a record type with
4951 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise
4952 /// it simply returns the passed in expression.
4953 ExprResult MaybeBindToTemporary(Expr *E);
4954
4955 bool CompleteConstructorCall(CXXConstructorDecl *Constructor,
4956 MultiExprArg ArgsPtr,
4957 SourceLocation Loc,
4958 SmallVectorImpl<Expr*> &ConvertedArgs,
4959 bool AllowExplicit = false,
4960 bool IsListInitialization = false);
4961
4962 ParsedType getInheritingConstructorName(CXXScopeSpec &SS,
4963 SourceLocation NameLoc,
4964 IdentifierInfo &Name);
4965
4966 ParsedType getDestructorName(SourceLocation TildeLoc,
4967 IdentifierInfo &II, SourceLocation NameLoc,
4968 Scope *S, CXXScopeSpec &SS,
4969 ParsedType ObjectType,
4970 bool EnteringContext);
4971
4972 ParsedType getDestructorTypeForDecltype(const DeclSpec &DS,
4973 ParsedType ObjectType);
4974
4975 // Checks that reinterpret casts don't have undefined behavior.
4976 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType,
4977 bool IsDereference, SourceRange Range);
4978
4979 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's.
4980 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc,
4981 tok::TokenKind Kind,
4982 SourceLocation LAngleBracketLoc,
4983 Declarator &D,
4984 SourceLocation RAngleBracketLoc,
4985 SourceLocation LParenLoc,
4986 Expr *E,
4987 SourceLocation RParenLoc);
4988
4989 ExprResult BuildCXXNamedCast(SourceLocation OpLoc,
4990 tok::TokenKind Kind,
4991 TypeSourceInfo *Ty,
4992 Expr *E,
4993 SourceRange AngleBrackets,
4994 SourceRange Parens);
4995
4996 ExprResult BuildCXXTypeId(QualType TypeInfoType,
4997 SourceLocation TypeidLoc,
4998 TypeSourceInfo *Operand,
4999 SourceLocation RParenLoc);
5000 ExprResult BuildCXXTypeId(QualType TypeInfoType,
5001 SourceLocation TypeidLoc,
5002 Expr *Operand,
5003 SourceLocation RParenLoc);
5004
5005 /// ActOnCXXTypeid - Parse typeid( something ).
5006 ExprResult ActOnCXXTypeid(SourceLocation OpLoc,
5007 SourceLocation LParenLoc, bool isType,
5008 void *TyOrExpr,
5009 SourceLocation RParenLoc);
5010
5011 ExprResult BuildCXXUuidof(QualType TypeInfoType,
5012 SourceLocation TypeidLoc,
5013 TypeSourceInfo *Operand,
5014 SourceLocation RParenLoc);
5015 ExprResult BuildCXXUuidof(QualType TypeInfoType,
5016 SourceLocation TypeidLoc,
5017 Expr *Operand,
5018 SourceLocation RParenLoc);
5019
5020 /// ActOnCXXUuidof - Parse __uuidof( something ).
5021 ExprResult ActOnCXXUuidof(SourceLocation OpLoc,
5022 SourceLocation LParenLoc, bool isType,
5023 void *TyOrExpr,
5024 SourceLocation RParenLoc);
5025
5026 /// \brief Handle a C++1z fold-expression: ( expr op ... op expr ).
5027 ExprResult ActOnCXXFoldExpr(SourceLocation LParenLoc, Expr *LHS,
5028 tok::TokenKind Operator,
5029 SourceLocation EllipsisLoc, Expr *RHS,
5030 SourceLocation RParenLoc);
5031 ExprResult BuildCXXFoldExpr(SourceLocation LParenLoc, Expr *LHS,
5032 BinaryOperatorKind Operator,
5033 SourceLocation EllipsisLoc, Expr *RHS,
5034 SourceLocation RParenLoc);
5035 ExprResult BuildEmptyCXXFoldExpr(SourceLocation EllipsisLoc,
5036 BinaryOperatorKind Operator);
5037
5038 //// ActOnCXXThis - Parse 'this' pointer.
5039 ExprResult ActOnCXXThis(SourceLocation loc);
5040
5041 /// \brief Try to retrieve the type of the 'this' pointer.
5042 ///
5043 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type.
5044 QualType getCurrentThisType();
5045
5046 /// \brief When non-NULL, the C++ 'this' expression is allowed despite the
5047 /// current context not being a non-static member function. In such cases,
5048 /// this provides the type used for 'this'.
5049 QualType CXXThisTypeOverride;
5050
5051 /// \brief RAII object used to temporarily allow the C++ 'this' expression
5052 /// to be used, with the given qualifiers on the current class type.
5053 class CXXThisScopeRAII {
5054 Sema &S;
5055 QualType OldCXXThisTypeOverride;
5056 bool Enabled;
5057
5058 public:
5059 /// \brief Introduce a new scope where 'this' may be allowed (when enabled),
5060 /// using the given declaration (which is either a class template or a
5061 /// class) along with the given qualifiers.
5062 /// along with the qualifiers placed on '*this'.
5063 CXXThisScopeRAII(Sema &S, Decl *ContextDecl, unsigned CXXThisTypeQuals,
5064 bool Enabled = true);
5065
5066 ~CXXThisScopeRAII();
5067 };
5068
5069 /// \brief Make sure the value of 'this' is actually available in the current
5070 /// context, if it is a potentially evaluated context.
5071 ///
5072 /// \param Loc The location at which the capture of 'this' occurs.
5073 ///
5074 /// \param Explicit Whether 'this' is explicitly captured in a lambda
5075 /// capture list.
5076 ///
5077 /// \param FunctionScopeIndexToStopAt If non-null, it points to the index
5078 /// of the FunctionScopeInfo stack beyond which we do not attempt to capture.
5079 /// This is useful when enclosing lambdas must speculatively capture
5080 /// 'this' that may or may not be used in certain specializations of
5081 /// a nested generic lambda (depending on whether the name resolves to
5082 /// a non-static member function or a static function).
5083 /// \return returns 'true' if failed, 'false' if success.
5084 bool CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false,
5085 bool BuildAndDiagnose = true,
5086 const unsigned *const FunctionScopeIndexToStopAt = nullptr,
5087 bool ByCopy = false);
5088
5089 /// \brief Determine whether the given type is the type of *this that is used
5090 /// outside of the body of a member function for a type that is currently
5091 /// being defined.
5092 bool isThisOutsideMemberFunctionBody(QualType BaseType);
5093
5094 /// ActOnCXXBoolLiteral - Parse {true,false} literals.
5095 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind);
5096
5097
5098 /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals.
5099 ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind);
5100
5101 ExprResult
5102 ActOnObjCAvailabilityCheckExpr(llvm::ArrayRef<AvailabilitySpec> AvailSpecs,
5103 SourceLocation AtLoc, SourceLocation RParen);
5104
5105 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'.
5106 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc);
5107
5108 //// ActOnCXXThrow - Parse throw expressions.
5109 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr);
5110 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex,
5111 bool IsThrownVarInScope);
5112 bool CheckCXXThrowOperand(SourceLocation ThrowLoc, QualType ThrowTy, Expr *E);
5113
5114 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type.
5115 /// Can be interpreted either as function-style casting ("int(x)")
5116 /// or class type construction ("ClassType(x,y,z)")
5117 /// or creation of a value-initialized type ("int()").
5118 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep,
5119 SourceLocation LParenOrBraceLoc,
5120 MultiExprArg Exprs,
5121 SourceLocation RParenOrBraceLoc,
5122 bool ListInitialization);
5123
5124 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type,
5125 SourceLocation LParenLoc,
5126 MultiExprArg Exprs,
5127 SourceLocation RParenLoc,
5128 bool ListInitialization);
5129
5130 /// ActOnCXXNew - Parsed a C++ 'new' expression.
5131 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal,
5132 SourceLocation PlacementLParen,
5133 MultiExprArg PlacementArgs,
5134 SourceLocation PlacementRParen,
5135 SourceRange TypeIdParens, Declarator &D,
5136 Expr *Initializer);
5137 ExprResult BuildCXXNew(SourceRange Range, bool UseGlobal,
5138 SourceLocation PlacementLParen,
5139 MultiExprArg PlacementArgs,
5140 SourceLocation PlacementRParen,
5141 SourceRange TypeIdParens,
5142 QualType AllocType,
5143 TypeSourceInfo *AllocTypeInfo,
5144 Expr *ArraySize,
5145 SourceRange DirectInitRange,
5146 Expr *Initializer);
5147
5148 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc,
5149 SourceRange R);
5150 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range,
5151 bool UseGlobal, QualType AllocType, bool IsArray,
5152 bool &PassAlignment, MultiExprArg PlaceArgs,
5153 FunctionDecl *&OperatorNew,
5154 FunctionDecl *&OperatorDelete);
5155 void DeclareGlobalNewDelete();
5156 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return,
5157 ArrayRef<QualType> Params);
5158
5159 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD,
5160 DeclarationName Name, FunctionDecl* &Operator,
5161 bool Diagnose = true);
5162 FunctionDecl *FindUsualDeallocationFunction(SourceLocation StartLoc,
5163 bool CanProvideSize,
5164 bool Overaligned,
5165 DeclarationName Name);
5166 FunctionDecl *FindDeallocationFunctionForDestructor(SourceLocation StartLoc,
5167 CXXRecordDecl *RD);
5168
5169 /// ActOnCXXDelete - Parsed a C++ 'delete' expression
5170 ExprResult ActOnCXXDelete(SourceLocation StartLoc,
5171 bool UseGlobal, bool ArrayForm,
5172 Expr *Operand);
5173 void CheckVirtualDtorCall(CXXDestructorDecl *dtor, SourceLocation Loc,
5174 bool IsDelete, bool CallCanBeVirtual,
5175 bool WarnOnNonAbstractTypes,
5176 SourceLocation DtorLoc);
5177
5178 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen,
5179 Expr *Operand, SourceLocation RParen);
5180 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand,
5181 SourceLocation RParen);
5182
5183 /// \brief Parsed one of the type trait support pseudo-functions.
5184 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc,
5185 ArrayRef<ParsedType> Args,
5186 SourceLocation RParenLoc);
5187 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc,
5188 ArrayRef<TypeSourceInfo *> Args,
5189 SourceLocation RParenLoc);
5190
5191 /// ActOnArrayTypeTrait - Parsed one of the binary type trait support
5192 /// pseudo-functions.
5193 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT,
5194 SourceLocation KWLoc,
5195 ParsedType LhsTy,
5196 Expr *DimExpr,
5197 SourceLocation RParen);
5198
5199 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT,
5200 SourceLocation KWLoc,
5201 TypeSourceInfo *TSInfo,
5202 Expr *DimExpr,
5203 SourceLocation RParen);
5204
5205 /// ActOnExpressionTrait - Parsed one of the unary type trait support
5206 /// pseudo-functions.
5207 ExprResult ActOnExpressionTrait(ExpressionTrait OET,
5208 SourceLocation KWLoc,
5209 Expr *Queried,
5210 SourceLocation RParen);
5211
5212 ExprResult BuildExpressionTrait(ExpressionTrait OET,
5213 SourceLocation KWLoc,
5214 Expr *Queried,
5215 SourceLocation RParen);
5216
5217 ExprResult ActOnStartCXXMemberReference(Scope *S,
5218 Expr *Base,
5219 SourceLocation OpLoc,
5220 tok::TokenKind OpKind,
5221 ParsedType &ObjectType,
5222 bool &MayBePseudoDestructor);
5223
5224 ExprResult BuildPseudoDestructorExpr(Expr *Base,
5225 SourceLocation OpLoc,
5226 tok::TokenKind OpKind,
5227 const CXXScopeSpec &SS,
5228 TypeSourceInfo *ScopeType,
5229 SourceLocation CCLoc,
5230 SourceLocation TildeLoc,
5231 PseudoDestructorTypeStorage DestroyedType);
5232
5233 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
5234 SourceLocation OpLoc,
5235 tok::TokenKind OpKind,
5236 CXXScopeSpec &SS,
5237 UnqualifiedId &FirstTypeName,
5238 SourceLocation CCLoc,
5239 SourceLocation TildeLoc,
5240 UnqualifiedId &SecondTypeName);
5241
5242 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base,
5243 SourceLocation OpLoc,
5244 tok::TokenKind OpKind,
5245 SourceLocation TildeLoc,
5246 const DeclSpec& DS);
5247
5248 /// MaybeCreateExprWithCleanups - If the current full-expression
5249 /// requires any cleanups, surround it with a ExprWithCleanups node.
5250 /// Otherwise, just returns the passed-in expression.
5251 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr);
5252 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt);
5253 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr);
5254
5255 MaterializeTemporaryExpr *
5256 CreateMaterializeTemporaryExpr(QualType T, Expr *Temporary,
5257 bool BoundToLvalueReference);
5258
5259 ExprResult ActOnFinishFullExpr(Expr *Expr) {
5260 return ActOnFinishFullExpr(Expr, Expr ? Expr->getExprLoc()
5261 : SourceLocation());
5262 }
5263 ExprResult ActOnFinishFullExpr(Expr *Expr, SourceLocation CC,
5264 bool DiscardedValue = false,
5265 bool IsConstexpr = false,
5266 bool IsLambdaInitCaptureInitializer = false);
5267 StmtResult ActOnFinishFullStmt(Stmt *Stmt);
5268
5269 // Marks SS invalid if it represents an incomplete type.
5270 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC);
5271
5272 DeclContext *computeDeclContext(QualType T);
5273 DeclContext *computeDeclContext(const CXXScopeSpec &SS,
5274 bool EnteringContext = false);
5275 bool isDependentScopeSpecifier(const CXXScopeSpec &SS);
5276 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS);
5277
5278 /// \brief The parser has parsed a global nested-name-specifier '::'.
5279 ///
5280 /// \param CCLoc The location of the '::'.
5281 ///
5282 /// \param SS The nested-name-specifier, which will be updated in-place
5283 /// to reflect the parsed nested-name-specifier.
5284 ///
5285 /// \returns true if an error occurred, false otherwise.
5286 bool ActOnCXXGlobalScopeSpecifier(SourceLocation CCLoc, CXXScopeSpec &SS);
5287
5288 /// \brief The parser has parsed a '__super' nested-name-specifier.