| File: | build/source/clang/lib/Sema/SemaType.cpp |
| Warning: | line 9538, column 8 Called C++ object pointer is null |
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| 1 | //===--- SemaType.cpp - Semantic Analysis for Types -----------------------===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
| 9 | // This file implements type-related semantic analysis. |
| 10 | // |
| 11 | //===----------------------------------------------------------------------===// |
| 12 | |
| 13 | #include "TypeLocBuilder.h" |
| 14 | #include "clang/AST/ASTConsumer.h" |
| 15 | #include "clang/AST/ASTContext.h" |
| 16 | #include "clang/AST/ASTMutationListener.h" |
| 17 | #include "clang/AST/ASTStructuralEquivalence.h" |
| 18 | #include "clang/AST/CXXInheritance.h" |
| 19 | #include "clang/AST/DeclObjC.h" |
| 20 | #include "clang/AST/DeclTemplate.h" |
| 21 | #include "clang/AST/Expr.h" |
| 22 | #include "clang/AST/Type.h" |
| 23 | #include "clang/AST/TypeLoc.h" |
| 24 | #include "clang/AST/TypeLocVisitor.h" |
| 25 | #include "clang/Basic/PartialDiagnostic.h" |
| 26 | #include "clang/Basic/SourceLocation.h" |
| 27 | #include "clang/Basic/Specifiers.h" |
| 28 | #include "clang/Basic/TargetInfo.h" |
| 29 | #include "clang/Lex/Preprocessor.h" |
| 30 | #include "clang/Sema/DeclSpec.h" |
| 31 | #include "clang/Sema/DelayedDiagnostic.h" |
| 32 | #include "clang/Sema/Lookup.h" |
| 33 | #include "clang/Sema/ParsedTemplate.h" |
| 34 | #include "clang/Sema/ScopeInfo.h" |
| 35 | #include "clang/Sema/SemaInternal.h" |
| 36 | #include "clang/Sema/Template.h" |
| 37 | #include "clang/Sema/TemplateInstCallback.h" |
| 38 | #include "llvm/ADT/ArrayRef.h" |
| 39 | #include "llvm/ADT/SmallPtrSet.h" |
| 40 | #include "llvm/ADT/SmallString.h" |
| 41 | #include "llvm/IR/DerivedTypes.h" |
| 42 | #include "llvm/Support/ErrorHandling.h" |
| 43 | #include <bitset> |
| 44 | #include <optional> |
| 45 | |
| 46 | using namespace clang; |
| 47 | |
| 48 | enum TypeDiagSelector { |
| 49 | TDS_Function, |
| 50 | TDS_Pointer, |
| 51 | TDS_ObjCObjOrBlock |
| 52 | }; |
| 53 | |
| 54 | /// isOmittedBlockReturnType - Return true if this declarator is missing a |
| 55 | /// return type because this is a omitted return type on a block literal. |
| 56 | static bool isOmittedBlockReturnType(const Declarator &D) { |
| 57 | if (D.getContext() != DeclaratorContext::BlockLiteral || |
| 58 | D.getDeclSpec().hasTypeSpecifier()) |
| 59 | return false; |
| 60 | |
| 61 | if (D.getNumTypeObjects() == 0) |
| 62 | return true; // ^{ ... } |
| 63 | |
| 64 | if (D.getNumTypeObjects() == 1 && |
| 65 | D.getTypeObject(0).Kind == DeclaratorChunk::Function) |
| 66 | return true; // ^(int X, float Y) { ... } |
| 67 | |
| 68 | return false; |
| 69 | } |
| 70 | |
| 71 | /// diagnoseBadTypeAttribute - Diagnoses a type attribute which |
| 72 | /// doesn't apply to the given type. |
| 73 | static void diagnoseBadTypeAttribute(Sema &S, const ParsedAttr &attr, |
| 74 | QualType type) { |
| 75 | TypeDiagSelector WhichType; |
| 76 | bool useExpansionLoc = true; |
| 77 | switch (attr.getKind()) { |
| 78 | case ParsedAttr::AT_ObjCGC: |
| 79 | WhichType = TDS_Pointer; |
| 80 | break; |
| 81 | case ParsedAttr::AT_ObjCOwnership: |
| 82 | WhichType = TDS_ObjCObjOrBlock; |
| 83 | break; |
| 84 | default: |
| 85 | // Assume everything else was a function attribute. |
| 86 | WhichType = TDS_Function; |
| 87 | useExpansionLoc = false; |
| 88 | break; |
| 89 | } |
| 90 | |
| 91 | SourceLocation loc = attr.getLoc(); |
| 92 | StringRef name = attr.getAttrName()->getName(); |
| 93 | |
| 94 | // The GC attributes are usually written with macros; special-case them. |
| 95 | IdentifierInfo *II = attr.isArgIdent(0) ? attr.getArgAsIdent(0)->Ident |
| 96 | : nullptr; |
| 97 | if (useExpansionLoc && loc.isMacroID() && II) { |
| 98 | if (II->isStr("strong")) { |
| 99 | if (S.findMacroSpelling(loc, "__strong")) name = "__strong"; |
| 100 | } else if (II->isStr("weak")) { |
| 101 | if (S.findMacroSpelling(loc, "__weak")) name = "__weak"; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | S.Diag(loc, diag::warn_type_attribute_wrong_type) << name << WhichType |
| 106 | << type; |
| 107 | } |
| 108 | |
| 109 | // objc_gc applies to Objective-C pointers or, otherwise, to the |
| 110 | // smallest available pointer type (i.e. 'void*' in 'void**'). |
| 111 | #define OBJC_POINTER_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_ObjCGC: case ParsedAttr::AT_ObjCOwnership \ |
| 112 | case ParsedAttr::AT_ObjCGC: \ |
| 113 | case ParsedAttr::AT_ObjCOwnership |
| 114 | |
| 115 | // Calling convention attributes. |
| 116 | #define CALLING_CONV_ATTRS_CASELISTcase ParsedAttr::AT_CDecl: case ParsedAttr::AT_FastCall: case ParsedAttr::AT_StdCall: case ParsedAttr::AT_ThisCall: case ParsedAttr ::AT_RegCall: case ParsedAttr::AT_Pascal: case ParsedAttr::AT_SwiftCall : case ParsedAttr::AT_SwiftAsyncCall: case ParsedAttr::AT_VectorCall : case ParsedAttr::AT_AArch64VectorPcs: case ParsedAttr::AT_AArch64SVEPcs : case ParsedAttr::AT_AMDGPUKernelCall: case ParsedAttr::AT_MSABI : case ParsedAttr::AT_SysVABI: case ParsedAttr::AT_Pcs: case ParsedAttr ::AT_IntelOclBicc: case ParsedAttr::AT_PreserveMost: case ParsedAttr ::AT_PreserveAll \ |
| 117 | case ParsedAttr::AT_CDecl: \ |
| 118 | case ParsedAttr::AT_FastCall: \ |
| 119 | case ParsedAttr::AT_StdCall: \ |
| 120 | case ParsedAttr::AT_ThisCall: \ |
| 121 | case ParsedAttr::AT_RegCall: \ |
| 122 | case ParsedAttr::AT_Pascal: \ |
| 123 | case ParsedAttr::AT_SwiftCall: \ |
| 124 | case ParsedAttr::AT_SwiftAsyncCall: \ |
| 125 | case ParsedAttr::AT_VectorCall: \ |
| 126 | case ParsedAttr::AT_AArch64VectorPcs: \ |
| 127 | case ParsedAttr::AT_AArch64SVEPcs: \ |
| 128 | case ParsedAttr::AT_AMDGPUKernelCall: \ |
| 129 | case ParsedAttr::AT_MSABI: \ |
| 130 | case ParsedAttr::AT_SysVABI: \ |
| 131 | case ParsedAttr::AT_Pcs: \ |
| 132 | case ParsedAttr::AT_IntelOclBicc: \ |
| 133 | case ParsedAttr::AT_PreserveMost: \ |
| 134 | case ParsedAttr::AT_PreserveAll |
| 135 | |
| 136 | // Function type attributes. |
| 137 | #define FUNCTION_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_NSReturnsRetained: case ParsedAttr::AT_NoReturn : case ParsedAttr::AT_Regparm: case ParsedAttr::AT_CmseNSCall : case ParsedAttr::AT_AnyX86NoCallerSavedRegisters: case ParsedAttr ::AT_AnyX86NoCfCheck: case ParsedAttr::AT_CDecl: case ParsedAttr ::AT_FastCall: case ParsedAttr::AT_StdCall: case ParsedAttr:: AT_ThisCall: case ParsedAttr::AT_RegCall: case ParsedAttr::AT_Pascal : case ParsedAttr::AT_SwiftCall: case ParsedAttr::AT_SwiftAsyncCall : case ParsedAttr::AT_VectorCall: case ParsedAttr::AT_AArch64VectorPcs : case ParsedAttr::AT_AArch64SVEPcs: case ParsedAttr::AT_AMDGPUKernelCall : case ParsedAttr::AT_MSABI: case ParsedAttr::AT_SysVABI: case ParsedAttr::AT_Pcs: case ParsedAttr::AT_IntelOclBicc: case ParsedAttr ::AT_PreserveMost: case ParsedAttr::AT_PreserveAll \ |
| 138 | case ParsedAttr::AT_NSReturnsRetained: \ |
| 139 | case ParsedAttr::AT_NoReturn: \ |
| 140 | case ParsedAttr::AT_Regparm: \ |
| 141 | case ParsedAttr::AT_CmseNSCall: \ |
| 142 | case ParsedAttr::AT_AnyX86NoCallerSavedRegisters: \ |
| 143 | case ParsedAttr::AT_AnyX86NoCfCheck: \ |
| 144 | CALLING_CONV_ATTRS_CASELISTcase ParsedAttr::AT_CDecl: case ParsedAttr::AT_FastCall: case ParsedAttr::AT_StdCall: case ParsedAttr::AT_ThisCall: case ParsedAttr ::AT_RegCall: case ParsedAttr::AT_Pascal: case ParsedAttr::AT_SwiftCall : case ParsedAttr::AT_SwiftAsyncCall: case ParsedAttr::AT_VectorCall : case ParsedAttr::AT_AArch64VectorPcs: case ParsedAttr::AT_AArch64SVEPcs : case ParsedAttr::AT_AMDGPUKernelCall: case ParsedAttr::AT_MSABI : case ParsedAttr::AT_SysVABI: case ParsedAttr::AT_Pcs: case ParsedAttr ::AT_IntelOclBicc: case ParsedAttr::AT_PreserveMost: case ParsedAttr ::AT_PreserveAll |
| 145 | |
| 146 | // Microsoft-specific type qualifiers. |
| 147 | #define MS_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_Ptr32: case ParsedAttr::AT_Ptr64: case ParsedAttr ::AT_SPtr: case ParsedAttr::AT_UPtr \ |
| 148 | case ParsedAttr::AT_Ptr32: \ |
| 149 | case ParsedAttr::AT_Ptr64: \ |
| 150 | case ParsedAttr::AT_SPtr: \ |
| 151 | case ParsedAttr::AT_UPtr |
| 152 | |
| 153 | // Nullability qualifiers. |
| 154 | #define NULLABILITY_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_TypeNonNull: case ParsedAttr::AT_TypeNullable : case ParsedAttr::AT_TypeNullableResult: case ParsedAttr::AT_TypeNullUnspecified \ |
| 155 | case ParsedAttr::AT_TypeNonNull: \ |
| 156 | case ParsedAttr::AT_TypeNullable: \ |
| 157 | case ParsedAttr::AT_TypeNullableResult: \ |
| 158 | case ParsedAttr::AT_TypeNullUnspecified |
| 159 | |
| 160 | namespace { |
| 161 | /// An object which stores processing state for the entire |
| 162 | /// GetTypeForDeclarator process. |
| 163 | class TypeProcessingState { |
| 164 | Sema &sema; |
| 165 | |
| 166 | /// The declarator being processed. |
| 167 | Declarator &declarator; |
| 168 | |
| 169 | /// The index of the declarator chunk we're currently processing. |
| 170 | /// May be the total number of valid chunks, indicating the |
| 171 | /// DeclSpec. |
| 172 | unsigned chunkIndex; |
| 173 | |
| 174 | /// The original set of attributes on the DeclSpec. |
| 175 | SmallVector<ParsedAttr *, 2> savedAttrs; |
| 176 | |
| 177 | /// A list of attributes to diagnose the uselessness of when the |
| 178 | /// processing is complete. |
| 179 | SmallVector<ParsedAttr *, 2> ignoredTypeAttrs; |
| 180 | |
| 181 | /// Attributes corresponding to AttributedTypeLocs that we have not yet |
| 182 | /// populated. |
| 183 | // FIXME: The two-phase mechanism by which we construct Types and fill |
| 184 | // their TypeLocs makes it hard to correctly assign these. We keep the |
| 185 | // attributes in creation order as an attempt to make them line up |
| 186 | // properly. |
| 187 | using TypeAttrPair = std::pair<const AttributedType*, const Attr*>; |
| 188 | SmallVector<TypeAttrPair, 8> AttrsForTypes; |
| 189 | bool AttrsForTypesSorted = true; |
| 190 | |
| 191 | /// MacroQualifiedTypes mapping to macro expansion locations that will be |
| 192 | /// stored in a MacroQualifiedTypeLoc. |
| 193 | llvm::DenseMap<const MacroQualifiedType *, SourceLocation> LocsForMacros; |
| 194 | |
| 195 | /// Flag to indicate we parsed a noderef attribute. This is used for |
| 196 | /// validating that noderef was used on a pointer or array. |
| 197 | bool parsedNoDeref; |
| 198 | |
| 199 | public: |
| 200 | TypeProcessingState(Sema &sema, Declarator &declarator) |
| 201 | : sema(sema), declarator(declarator), |
| 202 | chunkIndex(declarator.getNumTypeObjects()), parsedNoDeref(false) {} |
| 203 | |
| 204 | Sema &getSema() const { |
| 205 | return sema; |
| 206 | } |
| 207 | |
| 208 | Declarator &getDeclarator() const { |
| 209 | return declarator; |
| 210 | } |
| 211 | |
| 212 | bool isProcessingDeclSpec() const { |
| 213 | return chunkIndex == declarator.getNumTypeObjects(); |
| 214 | } |
| 215 | |
| 216 | unsigned getCurrentChunkIndex() const { |
| 217 | return chunkIndex; |
| 218 | } |
| 219 | |
| 220 | void setCurrentChunkIndex(unsigned idx) { |
| 221 | assert(idx <= declarator.getNumTypeObjects())(static_cast <bool> (idx <= declarator.getNumTypeObjects ()) ? void (0) : __assert_fail ("idx <= declarator.getNumTypeObjects()" , "clang/lib/Sema/SemaType.cpp", 221, __extension__ __PRETTY_FUNCTION__ )); |
| 222 | chunkIndex = idx; |
| 223 | } |
| 224 | |
| 225 | ParsedAttributesView &getCurrentAttributes() const { |
| 226 | if (isProcessingDeclSpec()) |
| 227 | return getMutableDeclSpec().getAttributes(); |
| 228 | return declarator.getTypeObject(chunkIndex).getAttrs(); |
| 229 | } |
| 230 | |
| 231 | /// Save the current set of attributes on the DeclSpec. |
| 232 | void saveDeclSpecAttrs() { |
| 233 | // Don't try to save them multiple times. |
| 234 | if (!savedAttrs.empty()) |
| 235 | return; |
| 236 | |
| 237 | DeclSpec &spec = getMutableDeclSpec(); |
| 238 | llvm::append_range(savedAttrs, |
| 239 | llvm::make_pointer_range(spec.getAttributes())); |
| 240 | } |
| 241 | |
| 242 | /// Record that we had nowhere to put the given type attribute. |
| 243 | /// We will diagnose such attributes later. |
| 244 | void addIgnoredTypeAttr(ParsedAttr &attr) { |
| 245 | ignoredTypeAttrs.push_back(&attr); |
| 246 | } |
| 247 | |
| 248 | /// Diagnose all the ignored type attributes, given that the |
| 249 | /// declarator worked out to the given type. |
| 250 | void diagnoseIgnoredTypeAttrs(QualType type) const { |
| 251 | for (auto *Attr : ignoredTypeAttrs) |
| 252 | diagnoseBadTypeAttribute(getSema(), *Attr, type); |
| 253 | } |
| 254 | |
| 255 | /// Get an attributed type for the given attribute, and remember the Attr |
| 256 | /// object so that we can attach it to the AttributedTypeLoc. |
| 257 | QualType getAttributedType(Attr *A, QualType ModifiedType, |
| 258 | QualType EquivType) { |
| 259 | QualType T = |
| 260 | sema.Context.getAttributedType(A->getKind(), ModifiedType, EquivType); |
| 261 | AttrsForTypes.push_back({cast<AttributedType>(T.getTypePtr()), A}); |
| 262 | AttrsForTypesSorted = false; |
| 263 | return T; |
| 264 | } |
| 265 | |
| 266 | /// Get a BTFTagAttributed type for the btf_type_tag attribute. |
| 267 | QualType getBTFTagAttributedType(const BTFTypeTagAttr *BTFAttr, |
| 268 | QualType WrappedType) { |
| 269 | return sema.Context.getBTFTagAttributedType(BTFAttr, WrappedType); |
| 270 | } |
| 271 | |
| 272 | /// Completely replace the \c auto in \p TypeWithAuto by |
| 273 | /// \p Replacement. Also replace \p TypeWithAuto in \c TypeAttrPair if |
| 274 | /// necessary. |
| 275 | QualType ReplaceAutoType(QualType TypeWithAuto, QualType Replacement) { |
| 276 | QualType T = sema.ReplaceAutoType(TypeWithAuto, Replacement); |
| 277 | if (auto *AttrTy = TypeWithAuto->getAs<AttributedType>()) { |
| 278 | // Attributed type still should be an attributed type after replacement. |
| 279 | auto *NewAttrTy = cast<AttributedType>(T.getTypePtr()); |
| 280 | for (TypeAttrPair &A : AttrsForTypes) { |
| 281 | if (A.first == AttrTy) |
| 282 | A.first = NewAttrTy; |
| 283 | } |
| 284 | AttrsForTypesSorted = false; |
| 285 | } |
| 286 | return T; |
| 287 | } |
| 288 | |
| 289 | /// Extract and remove the Attr* for a given attributed type. |
| 290 | const Attr *takeAttrForAttributedType(const AttributedType *AT) { |
| 291 | if (!AttrsForTypesSorted) { |
| 292 | llvm::stable_sort(AttrsForTypes, llvm::less_first()); |
| 293 | AttrsForTypesSorted = true; |
| 294 | } |
| 295 | |
| 296 | // FIXME: This is quadratic if we have lots of reuses of the same |
| 297 | // attributed type. |
| 298 | for (auto It = std::partition_point( |
| 299 | AttrsForTypes.begin(), AttrsForTypes.end(), |
| 300 | [=](const TypeAttrPair &A) { return A.first < AT; }); |
| 301 | It != AttrsForTypes.end() && It->first == AT; ++It) { |
| 302 | if (It->second) { |
| 303 | const Attr *Result = It->second; |
| 304 | It->second = nullptr; |
| 305 | return Result; |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | llvm_unreachable("no Attr* for AttributedType*")::llvm::llvm_unreachable_internal("no Attr* for AttributedType*" , "clang/lib/Sema/SemaType.cpp", 309); |
| 310 | } |
| 311 | |
| 312 | SourceLocation |
| 313 | getExpansionLocForMacroQualifiedType(const MacroQualifiedType *MQT) const { |
| 314 | auto FoundLoc = LocsForMacros.find(MQT); |
| 315 | assert(FoundLoc != LocsForMacros.end() &&(static_cast <bool> (FoundLoc != LocsForMacros.end() && "Unable to find macro expansion location for MacroQualifedType" ) ? void (0) : __assert_fail ("FoundLoc != LocsForMacros.end() && \"Unable to find macro expansion location for MacroQualifedType\"" , "clang/lib/Sema/SemaType.cpp", 316, __extension__ __PRETTY_FUNCTION__ )) |
| 316 | "Unable to find macro expansion location for MacroQualifedType")(static_cast <bool> (FoundLoc != LocsForMacros.end() && "Unable to find macro expansion location for MacroQualifedType" ) ? void (0) : __assert_fail ("FoundLoc != LocsForMacros.end() && \"Unable to find macro expansion location for MacroQualifedType\"" , "clang/lib/Sema/SemaType.cpp", 316, __extension__ __PRETTY_FUNCTION__ )); |
| 317 | return FoundLoc->second; |
| 318 | } |
| 319 | |
| 320 | void setExpansionLocForMacroQualifiedType(const MacroQualifiedType *MQT, |
| 321 | SourceLocation Loc) { |
| 322 | LocsForMacros[MQT] = Loc; |
| 323 | } |
| 324 | |
| 325 | void setParsedNoDeref(bool parsed) { parsedNoDeref = parsed; } |
| 326 | |
| 327 | bool didParseNoDeref() const { return parsedNoDeref; } |
| 328 | |
| 329 | ~TypeProcessingState() { |
| 330 | if (savedAttrs.empty()) |
| 331 | return; |
| 332 | |
| 333 | getMutableDeclSpec().getAttributes().clearListOnly(); |
| 334 | for (ParsedAttr *AL : savedAttrs) |
| 335 | getMutableDeclSpec().getAttributes().addAtEnd(AL); |
| 336 | } |
| 337 | |
| 338 | private: |
| 339 | DeclSpec &getMutableDeclSpec() const { |
| 340 | return const_cast<DeclSpec&>(declarator.getDeclSpec()); |
| 341 | } |
| 342 | }; |
| 343 | } // end anonymous namespace |
| 344 | |
| 345 | static void moveAttrFromListToList(ParsedAttr &attr, |
| 346 | ParsedAttributesView &fromList, |
| 347 | ParsedAttributesView &toList) { |
| 348 | fromList.remove(&attr); |
| 349 | toList.addAtEnd(&attr); |
| 350 | } |
| 351 | |
| 352 | /// The location of a type attribute. |
| 353 | enum TypeAttrLocation { |
| 354 | /// The attribute is in the decl-specifier-seq. |
| 355 | TAL_DeclSpec, |
| 356 | /// The attribute is part of a DeclaratorChunk. |
| 357 | TAL_DeclChunk, |
| 358 | /// The attribute is immediately after the declaration's name. |
| 359 | TAL_DeclName |
| 360 | }; |
| 361 | |
| 362 | static void processTypeAttrs(TypeProcessingState &state, QualType &type, |
| 363 | TypeAttrLocation TAL, |
| 364 | const ParsedAttributesView &attrs); |
| 365 | |
| 366 | static bool handleFunctionTypeAttr(TypeProcessingState &state, ParsedAttr &attr, |
| 367 | QualType &type); |
| 368 | |
| 369 | static bool handleMSPointerTypeQualifierAttr(TypeProcessingState &state, |
| 370 | ParsedAttr &attr, QualType &type); |
| 371 | |
| 372 | static bool handleObjCGCTypeAttr(TypeProcessingState &state, ParsedAttr &attr, |
| 373 | QualType &type); |
| 374 | |
| 375 | static bool handleObjCOwnershipTypeAttr(TypeProcessingState &state, |
| 376 | ParsedAttr &attr, QualType &type); |
| 377 | |
| 378 | static bool handleObjCPointerTypeAttr(TypeProcessingState &state, |
| 379 | ParsedAttr &attr, QualType &type) { |
| 380 | if (attr.getKind() == ParsedAttr::AT_ObjCGC) |
| 381 | return handleObjCGCTypeAttr(state, attr, type); |
| 382 | assert(attr.getKind() == ParsedAttr::AT_ObjCOwnership)(static_cast <bool> (attr.getKind() == ParsedAttr::AT_ObjCOwnership ) ? void (0) : __assert_fail ("attr.getKind() == ParsedAttr::AT_ObjCOwnership" , "clang/lib/Sema/SemaType.cpp", 382, __extension__ __PRETTY_FUNCTION__ )); |
| 383 | return handleObjCOwnershipTypeAttr(state, attr, type); |
| 384 | } |
| 385 | |
| 386 | /// Given the index of a declarator chunk, check whether that chunk |
| 387 | /// directly specifies the return type of a function and, if so, find |
| 388 | /// an appropriate place for it. |
| 389 | /// |
| 390 | /// \param i - a notional index which the search will start |
| 391 | /// immediately inside |
| 392 | /// |
| 393 | /// \param onlyBlockPointers Whether we should only look into block |
| 394 | /// pointer types (vs. all pointer types). |
| 395 | static DeclaratorChunk *maybeMovePastReturnType(Declarator &declarator, |
| 396 | unsigned i, |
| 397 | bool onlyBlockPointers) { |
| 398 | assert(i <= declarator.getNumTypeObjects())(static_cast <bool> (i <= declarator.getNumTypeObjects ()) ? void (0) : __assert_fail ("i <= declarator.getNumTypeObjects()" , "clang/lib/Sema/SemaType.cpp", 398, __extension__ __PRETTY_FUNCTION__ )); |
| 399 | |
| 400 | DeclaratorChunk *result = nullptr; |
| 401 | |
| 402 | // First, look inwards past parens for a function declarator. |
| 403 | for (; i != 0; --i) { |
| 404 | DeclaratorChunk &fnChunk = declarator.getTypeObject(i-1); |
| 405 | switch (fnChunk.Kind) { |
| 406 | case DeclaratorChunk::Paren: |
| 407 | continue; |
| 408 | |
| 409 | // If we find anything except a function, bail out. |
| 410 | case DeclaratorChunk::Pointer: |
| 411 | case DeclaratorChunk::BlockPointer: |
| 412 | case DeclaratorChunk::Array: |
| 413 | case DeclaratorChunk::Reference: |
| 414 | case DeclaratorChunk::MemberPointer: |
| 415 | case DeclaratorChunk::Pipe: |
| 416 | return result; |
| 417 | |
| 418 | // If we do find a function declarator, scan inwards from that, |
| 419 | // looking for a (block-)pointer declarator. |
| 420 | case DeclaratorChunk::Function: |
| 421 | for (--i; i != 0; --i) { |
| 422 | DeclaratorChunk &ptrChunk = declarator.getTypeObject(i-1); |
| 423 | switch (ptrChunk.Kind) { |
| 424 | case DeclaratorChunk::Paren: |
| 425 | case DeclaratorChunk::Array: |
| 426 | case DeclaratorChunk::Function: |
| 427 | case DeclaratorChunk::Reference: |
| 428 | case DeclaratorChunk::Pipe: |
| 429 | continue; |
| 430 | |
| 431 | case DeclaratorChunk::MemberPointer: |
| 432 | case DeclaratorChunk::Pointer: |
| 433 | if (onlyBlockPointers) |
| 434 | continue; |
| 435 | |
| 436 | [[fallthrough]]; |
| 437 | |
| 438 | case DeclaratorChunk::BlockPointer: |
| 439 | result = &ptrChunk; |
| 440 | goto continue_outer; |
| 441 | } |
| 442 | llvm_unreachable("bad declarator chunk kind")::llvm::llvm_unreachable_internal("bad declarator chunk kind" , "clang/lib/Sema/SemaType.cpp", 442); |
| 443 | } |
| 444 | |
| 445 | // If we run out of declarators doing that, we're done. |
| 446 | return result; |
| 447 | } |
| 448 | llvm_unreachable("bad declarator chunk kind")::llvm::llvm_unreachable_internal("bad declarator chunk kind" , "clang/lib/Sema/SemaType.cpp", 448); |
| 449 | |
| 450 | // Okay, reconsider from our new point. |
| 451 | continue_outer: ; |
| 452 | } |
| 453 | |
| 454 | // Ran out of chunks, bail out. |
| 455 | return result; |
| 456 | } |
| 457 | |
| 458 | /// Given that an objc_gc attribute was written somewhere on a |
| 459 | /// declaration *other* than on the declarator itself (for which, use |
| 460 | /// distributeObjCPointerTypeAttrFromDeclarator), and given that it |
| 461 | /// didn't apply in whatever position it was written in, try to move |
| 462 | /// it to a more appropriate position. |
| 463 | static void distributeObjCPointerTypeAttr(TypeProcessingState &state, |
| 464 | ParsedAttr &attr, QualType type) { |
| 465 | Declarator &declarator = state.getDeclarator(); |
| 466 | |
| 467 | // Move it to the outermost normal or block pointer declarator. |
| 468 | for (unsigned i = state.getCurrentChunkIndex(); i != 0; --i) { |
| 469 | DeclaratorChunk &chunk = declarator.getTypeObject(i-1); |
| 470 | switch (chunk.Kind) { |
| 471 | case DeclaratorChunk::Pointer: |
| 472 | case DeclaratorChunk::BlockPointer: { |
| 473 | // But don't move an ARC ownership attribute to the return type |
| 474 | // of a block. |
| 475 | DeclaratorChunk *destChunk = nullptr; |
| 476 | if (state.isProcessingDeclSpec() && |
| 477 | attr.getKind() == ParsedAttr::AT_ObjCOwnership) |
| 478 | destChunk = maybeMovePastReturnType(declarator, i - 1, |
| 479 | /*onlyBlockPointers=*/true); |
| 480 | if (!destChunk) destChunk = &chunk; |
| 481 | |
| 482 | moveAttrFromListToList(attr, state.getCurrentAttributes(), |
| 483 | destChunk->getAttrs()); |
| 484 | return; |
| 485 | } |
| 486 | |
| 487 | case DeclaratorChunk::Paren: |
| 488 | case DeclaratorChunk::Array: |
| 489 | continue; |
| 490 | |
| 491 | // We may be starting at the return type of a block. |
| 492 | case DeclaratorChunk::Function: |
| 493 | if (state.isProcessingDeclSpec() && |
| 494 | attr.getKind() == ParsedAttr::AT_ObjCOwnership) { |
| 495 | if (DeclaratorChunk *dest = maybeMovePastReturnType( |
| 496 | declarator, i, |
| 497 | /*onlyBlockPointers=*/true)) { |
| 498 | moveAttrFromListToList(attr, state.getCurrentAttributes(), |
| 499 | dest->getAttrs()); |
| 500 | return; |
| 501 | } |
| 502 | } |
| 503 | goto error; |
| 504 | |
| 505 | // Don't walk through these. |
| 506 | case DeclaratorChunk::Reference: |
| 507 | case DeclaratorChunk::MemberPointer: |
| 508 | case DeclaratorChunk::Pipe: |
| 509 | goto error; |
| 510 | } |
| 511 | } |
| 512 | error: |
| 513 | |
| 514 | diagnoseBadTypeAttribute(state.getSema(), attr, type); |
| 515 | } |
| 516 | |
| 517 | /// Distribute an objc_gc type attribute that was written on the |
| 518 | /// declarator. |
| 519 | static void distributeObjCPointerTypeAttrFromDeclarator( |
| 520 | TypeProcessingState &state, ParsedAttr &attr, QualType &declSpecType) { |
| 521 | Declarator &declarator = state.getDeclarator(); |
| 522 | |
| 523 | // objc_gc goes on the innermost pointer to something that's not a |
| 524 | // pointer. |
| 525 | unsigned innermost = -1U; |
| 526 | bool considerDeclSpec = true; |
| 527 | for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) { |
| 528 | DeclaratorChunk &chunk = declarator.getTypeObject(i); |
| 529 | switch (chunk.Kind) { |
| 530 | case DeclaratorChunk::Pointer: |
| 531 | case DeclaratorChunk::BlockPointer: |
| 532 | innermost = i; |
| 533 | continue; |
| 534 | |
| 535 | case DeclaratorChunk::Reference: |
| 536 | case DeclaratorChunk::MemberPointer: |
| 537 | case DeclaratorChunk::Paren: |
| 538 | case DeclaratorChunk::Array: |
| 539 | case DeclaratorChunk::Pipe: |
| 540 | continue; |
| 541 | |
| 542 | case DeclaratorChunk::Function: |
| 543 | considerDeclSpec = false; |
| 544 | goto done; |
| 545 | } |
| 546 | } |
| 547 | done: |
| 548 | |
| 549 | // That might actually be the decl spec if we weren't blocked by |
| 550 | // anything in the declarator. |
| 551 | if (considerDeclSpec) { |
| 552 | if (handleObjCPointerTypeAttr(state, attr, declSpecType)) { |
| 553 | // Splice the attribute into the decl spec. Prevents the |
| 554 | // attribute from being applied multiple times and gives |
| 555 | // the source-location-filler something to work with. |
| 556 | state.saveDeclSpecAttrs(); |
| 557 | declarator.getMutableDeclSpec().getAttributes().takeOneFrom( |
| 558 | declarator.getAttributes(), &attr); |
| 559 | return; |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | // Otherwise, if we found an appropriate chunk, splice the attribute |
| 564 | // into it. |
| 565 | if (innermost != -1U) { |
| 566 | moveAttrFromListToList(attr, declarator.getAttributes(), |
| 567 | declarator.getTypeObject(innermost).getAttrs()); |
| 568 | return; |
| 569 | } |
| 570 | |
| 571 | // Otherwise, diagnose when we're done building the type. |
| 572 | declarator.getAttributes().remove(&attr); |
| 573 | state.addIgnoredTypeAttr(attr); |
| 574 | } |
| 575 | |
| 576 | /// A function type attribute was written somewhere in a declaration |
| 577 | /// *other* than on the declarator itself or in the decl spec. Given |
| 578 | /// that it didn't apply in whatever position it was written in, try |
| 579 | /// to move it to a more appropriate position. |
| 580 | static void distributeFunctionTypeAttr(TypeProcessingState &state, |
| 581 | ParsedAttr &attr, QualType type) { |
| 582 | Declarator &declarator = state.getDeclarator(); |
| 583 | |
| 584 | // Try to push the attribute from the return type of a function to |
| 585 | // the function itself. |
| 586 | for (unsigned i = state.getCurrentChunkIndex(); i != 0; --i) { |
| 587 | DeclaratorChunk &chunk = declarator.getTypeObject(i-1); |
| 588 | switch (chunk.Kind) { |
| 589 | case DeclaratorChunk::Function: |
| 590 | moveAttrFromListToList(attr, state.getCurrentAttributes(), |
| 591 | chunk.getAttrs()); |
| 592 | return; |
| 593 | |
| 594 | case DeclaratorChunk::Paren: |
| 595 | case DeclaratorChunk::Pointer: |
| 596 | case DeclaratorChunk::BlockPointer: |
| 597 | case DeclaratorChunk::Array: |
| 598 | case DeclaratorChunk::Reference: |
| 599 | case DeclaratorChunk::MemberPointer: |
| 600 | case DeclaratorChunk::Pipe: |
| 601 | continue; |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | diagnoseBadTypeAttribute(state.getSema(), attr, type); |
| 606 | } |
| 607 | |
| 608 | /// Try to distribute a function type attribute to the innermost |
| 609 | /// function chunk or type. Returns true if the attribute was |
| 610 | /// distributed, false if no location was found. |
| 611 | static bool distributeFunctionTypeAttrToInnermost( |
| 612 | TypeProcessingState &state, ParsedAttr &attr, |
| 613 | ParsedAttributesView &attrList, QualType &declSpecType) { |
| 614 | Declarator &declarator = state.getDeclarator(); |
| 615 | |
| 616 | // Put it on the innermost function chunk, if there is one. |
| 617 | for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) { |
| 618 | DeclaratorChunk &chunk = declarator.getTypeObject(i); |
| 619 | if (chunk.Kind != DeclaratorChunk::Function) continue; |
| 620 | |
| 621 | moveAttrFromListToList(attr, attrList, chunk.getAttrs()); |
| 622 | return true; |
| 623 | } |
| 624 | |
| 625 | return handleFunctionTypeAttr(state, attr, declSpecType); |
| 626 | } |
| 627 | |
| 628 | /// A function type attribute was written in the decl spec. Try to |
| 629 | /// apply it somewhere. |
| 630 | static void distributeFunctionTypeAttrFromDeclSpec(TypeProcessingState &state, |
| 631 | ParsedAttr &attr, |
| 632 | QualType &declSpecType) { |
| 633 | state.saveDeclSpecAttrs(); |
| 634 | |
| 635 | // Try to distribute to the innermost. |
| 636 | if (distributeFunctionTypeAttrToInnermost( |
| 637 | state, attr, state.getCurrentAttributes(), declSpecType)) |
| 638 | return; |
| 639 | |
| 640 | // If that failed, diagnose the bad attribute when the declarator is |
| 641 | // fully built. |
| 642 | state.addIgnoredTypeAttr(attr); |
| 643 | } |
| 644 | |
| 645 | /// A function type attribute was written on the declarator or declaration. |
| 646 | /// Try to apply it somewhere. |
| 647 | /// `Attrs` is the attribute list containing the declaration (either of the |
| 648 | /// declarator or the declaration). |
| 649 | static void distributeFunctionTypeAttrFromDeclarator(TypeProcessingState &state, |
| 650 | ParsedAttr &attr, |
| 651 | QualType &declSpecType) { |
| 652 | Declarator &declarator = state.getDeclarator(); |
| 653 | |
| 654 | // Try to distribute to the innermost. |
| 655 | if (distributeFunctionTypeAttrToInnermost( |
| 656 | state, attr, declarator.getAttributes(), declSpecType)) |
| 657 | return; |
| 658 | |
| 659 | // If that failed, diagnose the bad attribute when the declarator is |
| 660 | // fully built. |
| 661 | declarator.getAttributes().remove(&attr); |
| 662 | state.addIgnoredTypeAttr(attr); |
| 663 | } |
| 664 | |
| 665 | /// Given that there are attributes written on the declarator or declaration |
| 666 | /// itself, try to distribute any type attributes to the appropriate |
| 667 | /// declarator chunk. |
| 668 | /// |
| 669 | /// These are attributes like the following: |
| 670 | /// int f ATTR; |
| 671 | /// int (f ATTR)(); |
| 672 | /// but not necessarily this: |
| 673 | /// int f() ATTR; |
| 674 | /// |
| 675 | /// `Attrs` is the attribute list containing the declaration (either of the |
| 676 | /// declarator or the declaration). |
| 677 | static void distributeTypeAttrsFromDeclarator(TypeProcessingState &state, |
| 678 | QualType &declSpecType) { |
| 679 | // The called functions in this loop actually remove things from the current |
| 680 | // list, so iterating over the existing list isn't possible. Instead, make a |
| 681 | // non-owning copy and iterate over that. |
| 682 | ParsedAttributesView AttrsCopy{state.getDeclarator().getAttributes()}; |
| 683 | for (ParsedAttr &attr : AttrsCopy) { |
| 684 | // Do not distribute [[]] attributes. They have strict rules for what |
| 685 | // they appertain to. |
| 686 | if (attr.isStandardAttributeSyntax()) |
| 687 | continue; |
| 688 | |
| 689 | switch (attr.getKind()) { |
| 690 | OBJC_POINTER_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_ObjCGC: case ParsedAttr::AT_ObjCOwnership: |
| 691 | distributeObjCPointerTypeAttrFromDeclarator(state, attr, declSpecType); |
| 692 | break; |
| 693 | |
| 694 | FUNCTION_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_NSReturnsRetained: case ParsedAttr::AT_NoReturn : case ParsedAttr::AT_Regparm: case ParsedAttr::AT_CmseNSCall : case ParsedAttr::AT_AnyX86NoCallerSavedRegisters: case ParsedAttr ::AT_AnyX86NoCfCheck: case ParsedAttr::AT_CDecl: case ParsedAttr ::AT_FastCall: case ParsedAttr::AT_StdCall: case ParsedAttr:: AT_ThisCall: case ParsedAttr::AT_RegCall: case ParsedAttr::AT_Pascal : case ParsedAttr::AT_SwiftCall: case ParsedAttr::AT_SwiftAsyncCall : case ParsedAttr::AT_VectorCall: case ParsedAttr::AT_AArch64VectorPcs : case ParsedAttr::AT_AArch64SVEPcs: case ParsedAttr::AT_AMDGPUKernelCall : case ParsedAttr::AT_MSABI: case ParsedAttr::AT_SysVABI: case ParsedAttr::AT_Pcs: case ParsedAttr::AT_IntelOclBicc: case ParsedAttr ::AT_PreserveMost: case ParsedAttr::AT_PreserveAll: |
| 695 | distributeFunctionTypeAttrFromDeclarator(state, attr, declSpecType); |
| 696 | break; |
| 697 | |
| 698 | MS_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_Ptr32: case ParsedAttr::AT_Ptr64: case ParsedAttr ::AT_SPtr: case ParsedAttr::AT_UPtr: |
| 699 | // Microsoft type attributes cannot go after the declarator-id. |
| 700 | continue; |
| 701 | |
| 702 | NULLABILITY_TYPE_ATTRS_CASELISTcase ParsedAttr::AT_TypeNonNull: case ParsedAttr::AT_TypeNullable : case ParsedAttr::AT_TypeNullableResult: case ParsedAttr::AT_TypeNullUnspecified: |
| 703 | // Nullability specifiers cannot go after the declarator-id. |
| 704 | |
| 705 | // Objective-C __kindof does not get distributed. |
| 706 | case ParsedAttr::AT_ObjCKindOf: |
| 707 | continue; |
| 708 | |
| 709 | default: |
| 710 | break; |
| 711 | } |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | /// Add a synthetic '()' to a block-literal declarator if it is |
| 716 | /// required, given the return type. |
| 717 | static void maybeSynthesizeBlockSignature(TypeProcessingState &state, |
| 718 | QualType declSpecType) { |
| 719 | Declarator &declarator = state.getDeclarator(); |
| 720 | |
| 721 | // First, check whether the declarator would produce a function, |
| 722 | // i.e. whether the innermost semantic chunk is a function. |
| 723 | if (declarator.isFunctionDeclarator()) { |
| 724 | // If so, make that declarator a prototyped declarator. |
| 725 | declarator.getFunctionTypeInfo().hasPrototype = true; |
| 726 | return; |
| 727 | } |
| 728 | |
| 729 | // If there are any type objects, the type as written won't name a |
| 730 | // function, regardless of the decl spec type. This is because a |
| 731 | // block signature declarator is always an abstract-declarator, and |
| 732 | // abstract-declarators can't just be parentheses chunks. Therefore |
| 733 | // we need to build a function chunk unless there are no type |
| 734 | // objects and the decl spec type is a function. |
| 735 | if (!declarator.getNumTypeObjects() && declSpecType->isFunctionType()) |
| 736 | return; |
| 737 | |
| 738 | // Note that there *are* cases with invalid declarators where |
| 739 | // declarators consist solely of parentheses. In general, these |
| 740 | // occur only in failed efforts to make function declarators, so |
| 741 | // faking up the function chunk is still the right thing to do. |
| 742 | |
| 743 | // Otherwise, we need to fake up a function declarator. |
| 744 | SourceLocation loc = declarator.getBeginLoc(); |
| 745 | |
| 746 | // ...and *prepend* it to the declarator. |
| 747 | SourceLocation NoLoc; |
| 748 | declarator.AddInnermostTypeInfo(DeclaratorChunk::getFunction( |
| 749 | /*HasProto=*/true, |
| 750 | /*IsAmbiguous=*/false, |
| 751 | /*LParenLoc=*/NoLoc, |
| 752 | /*ArgInfo=*/nullptr, |
| 753 | /*NumParams=*/0, |
| 754 | /*EllipsisLoc=*/NoLoc, |
| 755 | /*RParenLoc=*/NoLoc, |
| 756 | /*RefQualifierIsLvalueRef=*/true, |
| 757 | /*RefQualifierLoc=*/NoLoc, |
| 758 | /*MutableLoc=*/NoLoc, EST_None, |
| 759 | /*ESpecRange=*/SourceRange(), |
| 760 | /*Exceptions=*/nullptr, |
| 761 | /*ExceptionRanges=*/nullptr, |
| 762 | /*NumExceptions=*/0, |
| 763 | /*NoexceptExpr=*/nullptr, |
| 764 | /*ExceptionSpecTokens=*/nullptr, |
| 765 | /*DeclsInPrototype=*/std::nullopt, loc, loc, declarator)); |
| 766 | |
| 767 | // For consistency, make sure the state still has us as processing |
| 768 | // the decl spec. |
| 769 | assert(state.getCurrentChunkIndex() == declarator.getNumTypeObjects() - 1)(static_cast <bool> (state.getCurrentChunkIndex() == declarator .getNumTypeObjects() - 1) ? void (0) : __assert_fail ("state.getCurrentChunkIndex() == declarator.getNumTypeObjects() - 1" , "clang/lib/Sema/SemaType.cpp", 769, __extension__ __PRETTY_FUNCTION__ )); |
| 770 | state.setCurrentChunkIndex(declarator.getNumTypeObjects()); |
| 771 | } |
| 772 | |
| 773 | static void diagnoseAndRemoveTypeQualifiers(Sema &S, const DeclSpec &DS, |
| 774 | unsigned &TypeQuals, |
| 775 | QualType TypeSoFar, |
| 776 | unsigned RemoveTQs, |
| 777 | unsigned DiagID) { |
| 778 | // If this occurs outside a template instantiation, warn the user about |
| 779 | // it; they probably didn't mean to specify a redundant qualifier. |
| 780 | typedef std::pair<DeclSpec::TQ, SourceLocation> QualLoc; |
| 781 | for (QualLoc Qual : {QualLoc(DeclSpec::TQ_const, DS.getConstSpecLoc()), |
| 782 | QualLoc(DeclSpec::TQ_restrict, DS.getRestrictSpecLoc()), |
| 783 | QualLoc(DeclSpec::TQ_volatile, DS.getVolatileSpecLoc()), |
| 784 | QualLoc(DeclSpec::TQ_atomic, DS.getAtomicSpecLoc())}) { |
| 785 | if (!(RemoveTQs & Qual.first)) |
| 786 | continue; |
| 787 | |
| 788 | if (!S.inTemplateInstantiation()) { |
| 789 | if (TypeQuals & Qual.first) |
| 790 | S.Diag(Qual.second, DiagID) |
| 791 | << DeclSpec::getSpecifierName(Qual.first) << TypeSoFar |
| 792 | << FixItHint::CreateRemoval(Qual.second); |
| 793 | } |
| 794 | |
| 795 | TypeQuals &= ~Qual.first; |
| 796 | } |
| 797 | } |
| 798 | |
| 799 | /// Return true if this is omitted block return type. Also check type |
| 800 | /// attributes and type qualifiers when returning true. |
| 801 | static bool checkOmittedBlockReturnType(Sema &S, Declarator &declarator, |
| 802 | QualType Result) { |
| 803 | if (!isOmittedBlockReturnType(declarator)) |
| 804 | return false; |
| 805 | |
| 806 | // Warn if we see type attributes for omitted return type on a block literal. |
| 807 | SmallVector<ParsedAttr *, 2> ToBeRemoved; |
| 808 | for (ParsedAttr &AL : declarator.getMutableDeclSpec().getAttributes()) { |
| 809 | if (AL.isInvalid() || !AL.isTypeAttr()) |
| 810 | continue; |
| 811 | S.Diag(AL.getLoc(), |
| 812 | diag::warn_block_literal_attributes_on_omitted_return_type) |
| 813 | << AL; |
| 814 | ToBeRemoved.push_back(&AL); |
| 815 | } |
| 816 | // Remove bad attributes from the list. |
| 817 | for (ParsedAttr *AL : ToBeRemoved) |
| 818 | declarator.getMutableDeclSpec().getAttributes().remove(AL); |
| 819 | |
| 820 | // Warn if we see type qualifiers for omitted return type on a block literal. |
| 821 | const DeclSpec &DS = declarator.getDeclSpec(); |
| 822 | unsigned TypeQuals = DS.getTypeQualifiers(); |
| 823 | diagnoseAndRemoveTypeQualifiers(S, DS, TypeQuals, Result, (unsigned)-1, |
| 824 | diag::warn_block_literal_qualifiers_on_omitted_return_type); |
| 825 | declarator.getMutableDeclSpec().ClearTypeQualifiers(); |
| 826 | |
| 827 | return true; |
| 828 | } |
| 829 | |
| 830 | /// Apply Objective-C type arguments to the given type. |
| 831 | static QualType applyObjCTypeArgs(Sema &S, SourceLocation loc, QualType type, |
| 832 | ArrayRef<TypeSourceInfo *> typeArgs, |
| 833 | SourceRange typeArgsRange, bool failOnError, |
| 834 | bool rebuilding) { |
| 835 | // We can only apply type arguments to an Objective-C class type. |
| 836 | const auto *objcObjectType = type->getAs<ObjCObjectType>(); |
| 837 | if (!objcObjectType || !objcObjectType->getInterface()) { |
| 838 | S.Diag(loc, diag::err_objc_type_args_non_class) |
| 839 | << type |
| 840 | << typeArgsRange; |
| 841 | |
| 842 | if (failOnError) |
| 843 | return QualType(); |
| 844 | return type; |
| 845 | } |
| 846 | |
| 847 | // The class type must be parameterized. |
| 848 | ObjCInterfaceDecl *objcClass = objcObjectType->getInterface(); |
| 849 | ObjCTypeParamList *typeParams = objcClass->getTypeParamList(); |
| 850 | if (!typeParams) { |
| 851 | S.Diag(loc, diag::err_objc_type_args_non_parameterized_class) |
| 852 | << objcClass->getDeclName() |
| 853 | << FixItHint::CreateRemoval(typeArgsRange); |
| 854 | |
| 855 | if (failOnError) |
| 856 | return QualType(); |
| 857 | |
| 858 | return type; |
| 859 | } |
| 860 | |
| 861 | // The type must not already be specialized. |
| 862 | if (objcObjectType->isSpecialized()) { |
| 863 | S.Diag(loc, diag::err_objc_type_args_specialized_class) |
| 864 | << type |
| 865 | << FixItHint::CreateRemoval(typeArgsRange); |
| 866 | |
| 867 | if (failOnError) |
| 868 | return QualType(); |
| 869 | |
| 870 | return type; |
| 871 | } |
| 872 | |
| 873 | // Check the type arguments. |
| 874 | SmallVector<QualType, 4> finalTypeArgs; |
| 875 | unsigned numTypeParams = typeParams->size(); |
| 876 | bool anyPackExpansions = false; |
| 877 | for (unsigned i = 0, n = typeArgs.size(); i != n; ++i) { |
| 878 | TypeSourceInfo *typeArgInfo = typeArgs[i]; |
| 879 | QualType typeArg = typeArgInfo->getType(); |
| 880 | |
| 881 | // Type arguments cannot have explicit qualifiers or nullability. |
| 882 | // We ignore indirect sources of these, e.g. behind typedefs or |
| 883 | // template arguments. |
| 884 | if (TypeLoc qual = typeArgInfo->getTypeLoc().findExplicitQualifierLoc()) { |
| 885 | bool diagnosed = false; |
| 886 | SourceRange rangeToRemove; |
| 887 | if (auto attr = qual.getAs<AttributedTypeLoc>()) { |
| 888 | rangeToRemove = attr.getLocalSourceRange(); |
| 889 | if (attr.getTypePtr()->getImmediateNullability()) { |
| 890 | typeArg = attr.getTypePtr()->getModifiedType(); |
| 891 | S.Diag(attr.getBeginLoc(), |
| 892 | diag::err_objc_type_arg_explicit_nullability) |
| 893 | << typeArg << FixItHint::CreateRemoval(rangeToRemove); |
| 894 | diagnosed = true; |
| 895 | } |
| 896 | } |
| 897 | |
| 898 | // When rebuilding, qualifiers might have gotten here through a |
| 899 | // final substitution. |
| 900 | if (!rebuilding && !diagnosed) { |
| 901 | S.Diag(qual.getBeginLoc(), diag::err_objc_type_arg_qualified) |
| 902 | << typeArg << typeArg.getQualifiers().getAsString() |
| 903 | << FixItHint::CreateRemoval(rangeToRemove); |
| 904 | } |
| 905 | } |
| 906 | |
| 907 | // Remove qualifiers even if they're non-local. |
| 908 | typeArg = typeArg.getUnqualifiedType(); |
| 909 | |
| 910 | finalTypeArgs.push_back(typeArg); |
| 911 | |
| 912 | if (typeArg->getAs<PackExpansionType>()) |
| 913 | anyPackExpansions = true; |
| 914 | |
| 915 | // Find the corresponding type parameter, if there is one. |
| 916 | ObjCTypeParamDecl *typeParam = nullptr; |
| 917 | if (!anyPackExpansions) { |
| 918 | if (i < numTypeParams) { |
| 919 | typeParam = typeParams->begin()[i]; |
| 920 | } else { |
| 921 | // Too many arguments. |
| 922 | S.Diag(loc, diag::err_objc_type_args_wrong_arity) |
| 923 | << false |
| 924 | << objcClass->getDeclName() |
| 925 | << (unsigned)typeArgs.size() |
| 926 | << numTypeParams; |
| 927 | S.Diag(objcClass->getLocation(), diag::note_previous_decl) |
| 928 | << objcClass; |
| 929 | |
| 930 | if (failOnError) |
| 931 | return QualType(); |
| 932 | |
| 933 | return type; |
| 934 | } |
| 935 | } |
| 936 | |
| 937 | // Objective-C object pointer types must be substitutable for the bounds. |
| 938 | if (const auto *typeArgObjC = typeArg->getAs<ObjCObjectPointerType>()) { |
| 939 | // If we don't have a type parameter to match against, assume |
| 940 | // everything is fine. There was a prior pack expansion that |
| 941 | // means we won't be able to match anything. |
| 942 | if (!typeParam) { |
| 943 | assert(anyPackExpansions && "Too many arguments?")(static_cast <bool> (anyPackExpansions && "Too many arguments?" ) ? void (0) : __assert_fail ("anyPackExpansions && \"Too many arguments?\"" , "clang/lib/Sema/SemaType.cpp", 943, __extension__ __PRETTY_FUNCTION__ )); |
| 944 | continue; |
| 945 | } |
| 946 | |
| 947 | // Retrieve the bound. |
| 948 | QualType bound = typeParam->getUnderlyingType(); |
| 949 | const auto *boundObjC = bound->getAs<ObjCObjectPointerType>(); |
| 950 | |
| 951 | // Determine whether the type argument is substitutable for the bound. |
| 952 | if (typeArgObjC->isObjCIdType()) { |
| 953 | // When the type argument is 'id', the only acceptable type |
| 954 | // parameter bound is 'id'. |
| 955 | if (boundObjC->isObjCIdType()) |
| 956 | continue; |
| 957 | } else if (S.Context.canAssignObjCInterfaces(boundObjC, typeArgObjC)) { |
| 958 | // Otherwise, we follow the assignability rules. |
| 959 | continue; |
| 960 | } |
| 961 | |
| 962 | // Diagnose the mismatch. |
| 963 | S.Diag(typeArgInfo->getTypeLoc().getBeginLoc(), |
| 964 | diag::err_objc_type_arg_does_not_match_bound) |
| 965 | << typeArg << bound << typeParam->getDeclName(); |
| 966 | S.Diag(typeParam->getLocation(), diag::note_objc_type_param_here) |
| 967 | << typeParam->getDeclName(); |
| 968 | |
| 969 | if (failOnError) |
| 970 | return QualType(); |
| 971 | |
| 972 | return type; |
| 973 | } |
| 974 | |
| 975 | // Block pointer types are permitted for unqualified 'id' bounds. |
| 976 | if (typeArg->isBlockPointerType()) { |
| 977 | // If we don't have a type parameter to match against, assume |
| 978 | // everything is fine. There was a prior pack expansion that |
| 979 | // means we won't be able to match anything. |
| 980 | if (!typeParam) { |
| 981 | assert(anyPackExpansions && "Too many arguments?")(static_cast <bool> (anyPackExpansions && "Too many arguments?" ) ? void (0) : __assert_fail ("anyPackExpansions && \"Too many arguments?\"" , "clang/lib/Sema/SemaType.cpp", 981, __extension__ __PRETTY_FUNCTION__ )); |
| 982 | continue; |
| 983 | } |
| 984 | |
| 985 | // Retrieve the bound. |
| 986 | QualType bound = typeParam->getUnderlyingType(); |
| 987 | if (bound->isBlockCompatibleObjCPointerType(S.Context)) |
| 988 | continue; |
| 989 | |
| 990 | // Diagnose the mismatch. |
| 991 | S.Diag(typeArgInfo->getTypeLoc().getBeginLoc(), |
| 992 | diag::err_objc_type_arg_does_not_match_bound) |
| 993 | << typeArg << bound << typeParam->getDeclName(); |
| 994 | S.Diag(typeParam->getLocation(), diag::note_objc_type_param_here) |
| 995 | << typeParam->getDeclName(); |
| 996 | |
| 997 | if (failOnError) |
| 998 | return QualType(); |
| 999 | |
| 1000 | return type; |
| 1001 | } |
| 1002 | |
| 1003 | // Dependent types will be checked at instantiation time. |
| 1004 | if (typeArg->isDependentType()) { |
| 1005 | continue; |
| 1006 | } |
| 1007 | |
| 1008 | // Diagnose non-id-compatible type arguments. |
| 1009 | S.Diag(typeArgInfo->getTypeLoc().getBeginLoc(), |
| 1010 | diag::err_objc_type_arg_not_id_compatible) |
| 1011 | << typeArg << typeArgInfo->getTypeLoc().getSourceRange(); |
| 1012 | |
| 1013 | if (failOnError) |
| 1014 | return QualType(); |
| 1015 | |
| 1016 | return type; |
| 1017 | } |
| 1018 | |
| 1019 | // Make sure we didn't have the wrong number of arguments. |
| 1020 | if (!anyPackExpansions && finalTypeArgs.size() != numTypeParams) { |
| 1021 | S.Diag(loc, diag::err_objc_type_args_wrong_arity) |
| 1022 | << (typeArgs.size() < typeParams->size()) |
| 1023 | << objcClass->getDeclName() |
| 1024 | << (unsigned)finalTypeArgs.size() |
| 1025 | << (unsigned)numTypeParams; |
| 1026 | S.Diag(objcClass->getLocation(), diag::note_previous_decl) |
| 1027 | << objcClass; |
| 1028 | |
| 1029 | if (failOnError) |
| 1030 | return QualType(); |
| 1031 | |
| 1032 | return type; |
| 1033 | } |
| 1034 | |
| 1035 | // Success. Form the specialized type. |
| 1036 | return S.Context.getObjCObjectType(type, finalTypeArgs, { }, false); |
| 1037 | } |
| 1038 | |
| 1039 | QualType Sema::BuildObjCTypeParamType(const ObjCTypeParamDecl *Decl, |
| 1040 | SourceLocation ProtocolLAngleLoc, |
| 1041 | ArrayRef<ObjCProtocolDecl *> Protocols, |
| 1042 | ArrayRef<SourceLocation> ProtocolLocs, |
| 1043 | SourceLocation ProtocolRAngleLoc, |
| 1044 | bool FailOnError) { |
| 1045 | QualType Result = QualType(Decl->getTypeForDecl(), 0); |
| 1046 | if (!Protocols.empty()) { |
| 1047 | bool HasError; |
| 1048 | Result = Context.applyObjCProtocolQualifiers(Result, Protocols, |
| 1049 | HasError); |
| 1050 | if (HasError) { |
| 1051 | Diag(SourceLocation(), diag::err_invalid_protocol_qualifiers) |
| 1052 | << SourceRange(ProtocolLAngleLoc, ProtocolRAngleLoc); |
| 1053 | if (FailOnError) Result = QualType(); |
| 1054 | } |
| 1055 | if (FailOnError && Result.isNull()) |
| 1056 | return QualType(); |
| 1057 | } |
| 1058 | |
| 1059 | return Result; |
| 1060 | } |
| 1061 | |
| 1062 | QualType Sema::BuildObjCObjectType( |
| 1063 | QualType BaseType, SourceLocation Loc, SourceLocation TypeArgsLAngleLoc, |
| 1064 | ArrayRef<TypeSourceInfo *> TypeArgs, SourceLocation TypeArgsRAngleLoc, |
| 1065 | SourceLocation ProtocolLAngleLoc, ArrayRef<ObjCProtocolDecl *> Protocols, |
| 1066 | ArrayRef<SourceLocation> ProtocolLocs, SourceLocation ProtocolRAngleLoc, |
| 1067 | bool FailOnError, bool Rebuilding) { |
| 1068 | QualType Result = BaseType; |
| 1069 | if (!TypeArgs.empty()) { |
| 1070 | Result = |
| 1071 | applyObjCTypeArgs(*this, Loc, Result, TypeArgs, |
| 1072 | SourceRange(TypeArgsLAngleLoc, TypeArgsRAngleLoc), |
| 1073 | FailOnError, Rebuilding); |
| 1074 | if (FailOnError && Result.isNull()) |
| 1075 | return QualType(); |
| 1076 | } |
| 1077 | |
| 1078 | if (!Protocols.empty()) { |
| 1079 | bool HasError; |
| 1080 | Result = Context.applyObjCProtocolQualifiers(Result, Protocols, |
| 1081 | HasError); |
| 1082 | if (HasError) { |
| 1083 | Diag(Loc, diag::err_invalid_protocol_qualifiers) |
| 1084 | << SourceRange(ProtocolLAngleLoc, ProtocolRAngleLoc); |
| 1085 | if (FailOnError) Result = QualType(); |
| 1086 | } |
| 1087 | if (FailOnError && Result.isNull()) |
| 1088 | return QualType(); |
| 1089 | } |
| 1090 | |
| 1091 | return Result; |
| 1092 | } |
| 1093 | |
| 1094 | TypeResult Sema::actOnObjCProtocolQualifierType( |
| 1095 | SourceLocation lAngleLoc, |
| 1096 | ArrayRef<Decl *> protocols, |
| 1097 | ArrayRef<SourceLocation> protocolLocs, |
| 1098 | SourceLocation rAngleLoc) { |
| 1099 | // Form id<protocol-list>. |
| 1100 | QualType Result = Context.getObjCObjectType( |
| 1101 | Context.ObjCBuiltinIdTy, {}, |
| 1102 | llvm::ArrayRef((ObjCProtocolDecl *const *)protocols.data(), |
| 1103 | protocols.size()), |
| 1104 | false); |
| 1105 | Result = Context.getObjCObjectPointerType(Result); |
| 1106 | |
| 1107 | TypeSourceInfo *ResultTInfo = Context.CreateTypeSourceInfo(Result); |
| 1108 | TypeLoc ResultTL = ResultTInfo->getTypeLoc(); |
| 1109 | |
| 1110 | auto ObjCObjectPointerTL = ResultTL.castAs<ObjCObjectPointerTypeLoc>(); |
| 1111 | ObjCObjectPointerTL.setStarLoc(SourceLocation()); // implicit |
| 1112 | |
| 1113 | auto ObjCObjectTL = ObjCObjectPointerTL.getPointeeLoc() |
| 1114 | .castAs<ObjCObjectTypeLoc>(); |
| 1115 | ObjCObjectTL.setHasBaseTypeAsWritten(false); |
| 1116 | ObjCObjectTL.getBaseLoc().initialize(Context, SourceLocation()); |
| 1117 | |
| 1118 | // No type arguments. |
| 1119 | ObjCObjectTL.setTypeArgsLAngleLoc(SourceLocation()); |
| 1120 | ObjCObjectTL.setTypeArgsRAngleLoc(SourceLocation()); |
| 1121 | |
| 1122 | // Fill in protocol qualifiers. |
| 1123 | ObjCObjectTL.setProtocolLAngleLoc(lAngleLoc); |
| 1124 | ObjCObjectTL.setProtocolRAngleLoc(rAngleLoc); |
| 1125 | for (unsigned i = 0, n = protocols.size(); i != n; ++i) |
| 1126 | ObjCObjectTL.setProtocolLoc(i, protocolLocs[i]); |
| 1127 | |
| 1128 | // We're done. Return the completed type to the parser. |
| 1129 | return CreateParsedType(Result, ResultTInfo); |
| 1130 | } |
| 1131 | |
| 1132 | TypeResult Sema::actOnObjCTypeArgsAndProtocolQualifiers( |
| 1133 | Scope *S, |
| 1134 | SourceLocation Loc, |
| 1135 | ParsedType BaseType, |
| 1136 | SourceLocation TypeArgsLAngleLoc, |
| 1137 | ArrayRef<ParsedType> TypeArgs, |
| 1138 | SourceLocation TypeArgsRAngleLoc, |
| 1139 | SourceLocation ProtocolLAngleLoc, |
| 1140 | ArrayRef<Decl *> Protocols, |
| 1141 | ArrayRef<SourceLocation> ProtocolLocs, |
| 1142 | SourceLocation ProtocolRAngleLoc) { |
| 1143 | TypeSourceInfo *BaseTypeInfo = nullptr; |
| 1144 | QualType T = GetTypeFromParser(BaseType, &BaseTypeInfo); |
| 1145 | if (T.isNull()) |
| 1146 | return true; |
| 1147 | |
| 1148 | // Handle missing type-source info. |
| 1149 | if (!BaseTypeInfo) |
| 1150 | BaseTypeInfo = Context.getTrivialTypeSourceInfo(T, Loc); |
| 1151 | |
| 1152 | // Extract type arguments. |
| 1153 | SmallVector<TypeSourceInfo *, 4> ActualTypeArgInfos; |
| 1154 | for (unsigned i = 0, n = TypeArgs.size(); i != n; ++i) { |
| 1155 | TypeSourceInfo *TypeArgInfo = nullptr; |
| 1156 | QualType TypeArg = GetTypeFromParser(TypeArgs[i], &TypeArgInfo); |
| 1157 | if (TypeArg.isNull()) { |
| 1158 | ActualTypeArgInfos.clear(); |
| 1159 | break; |
| 1160 | } |
| 1161 | |
| 1162 | assert(TypeArgInfo && "No type source info?")(static_cast <bool> (TypeArgInfo && "No type source info?" ) ? void (0) : __assert_fail ("TypeArgInfo && \"No type source info?\"" , "clang/lib/Sema/SemaType.cpp", 1162, __extension__ __PRETTY_FUNCTION__ )); |
| 1163 | ActualTypeArgInfos.push_back(TypeArgInfo); |
| 1164 | } |
| 1165 | |
| 1166 | // Build the object type. |
| 1167 | QualType Result = BuildObjCObjectType( |
| 1168 | T, BaseTypeInfo->getTypeLoc().getSourceRange().getBegin(), |
| 1169 | TypeArgsLAngleLoc, ActualTypeArgInfos, TypeArgsRAngleLoc, |
| 1170 | ProtocolLAngleLoc, |
| 1171 | llvm::ArrayRef((ObjCProtocolDecl *const *)Protocols.data(), |
| 1172 | Protocols.size()), |
| 1173 | ProtocolLocs, ProtocolRAngleLoc, |
| 1174 | /*FailOnError=*/false, |
| 1175 | /*Rebuilding=*/false); |
| 1176 | |
| 1177 | if (Result == T) |
| 1178 | return BaseType; |
| 1179 | |
| 1180 | // Create source information for this type. |
| 1181 | TypeSourceInfo *ResultTInfo = Context.CreateTypeSourceInfo(Result); |
| 1182 | TypeLoc ResultTL = ResultTInfo->getTypeLoc(); |
| 1183 | |
| 1184 | // For id<Proto1, Proto2> or Class<Proto1, Proto2>, we'll have an |
| 1185 | // object pointer type. Fill in source information for it. |
| 1186 | if (auto ObjCObjectPointerTL = ResultTL.getAs<ObjCObjectPointerTypeLoc>()) { |
| 1187 | // The '*' is implicit. |
| 1188 | ObjCObjectPointerTL.setStarLoc(SourceLocation()); |
| 1189 | ResultTL = ObjCObjectPointerTL.getPointeeLoc(); |
| 1190 | } |
| 1191 | |
| 1192 | if (auto OTPTL = ResultTL.getAs<ObjCTypeParamTypeLoc>()) { |
| 1193 | // Protocol qualifier information. |
| 1194 | if (OTPTL.getNumProtocols() > 0) { |
| 1195 | assert(OTPTL.getNumProtocols() == Protocols.size())(static_cast <bool> (OTPTL.getNumProtocols() == Protocols .size()) ? void (0) : __assert_fail ("OTPTL.getNumProtocols() == Protocols.size()" , "clang/lib/Sema/SemaType.cpp", 1195, __extension__ __PRETTY_FUNCTION__ )); |
| 1196 | OTPTL.setProtocolLAngleLoc(ProtocolLAngleLoc); |
| 1197 | OTPTL.setProtocolRAngleLoc(ProtocolRAngleLoc); |
| 1198 | for (unsigned i = 0, n = Protocols.size(); i != n; ++i) |
| 1199 | OTPTL.setProtocolLoc(i, ProtocolLocs[i]); |
| 1200 | } |
| 1201 | |
| 1202 | // We're done. Return the completed type to the parser. |
| 1203 | return CreateParsedType(Result, ResultTInfo); |
| 1204 | } |
| 1205 | |
| 1206 | auto ObjCObjectTL = ResultTL.castAs<ObjCObjectTypeLoc>(); |
| 1207 | |
| 1208 | // Type argument information. |
| 1209 | if (ObjCObjectTL.getNumTypeArgs() > 0) { |
| 1210 | assert(ObjCObjectTL.getNumTypeArgs() == ActualTypeArgInfos.size())(static_cast <bool> (ObjCObjectTL.getNumTypeArgs() == ActualTypeArgInfos .size()) ? void (0) : __assert_fail ("ObjCObjectTL.getNumTypeArgs() == ActualTypeArgInfos.size()" , "clang/lib/Sema/SemaType.cpp", 1210, __extension__ __PRETTY_FUNCTION__ )); |
| 1211 | ObjCObjectTL.setTypeArgsLAngleLoc(TypeArgsLAngleLoc); |
| 1212 | ObjCObjectTL.setTypeArgsRAngleLoc(TypeArgsRAngleLoc); |
| 1213 | for (unsigned i = 0, n = ActualTypeArgInfos.size(); i != n; ++i) |
| 1214 | ObjCObjectTL.setTypeArgTInfo(i, ActualTypeArgInfos[i]); |
| 1215 | } else { |
| 1216 | ObjCObjectTL.setTypeArgsLAngleLoc(SourceLocation()); |
| 1217 | ObjCObjectTL.setTypeArgsRAngleLoc(SourceLocation()); |
| 1218 | } |
| 1219 | |
| 1220 | // Protocol qualifier information. |
| 1221 | if (ObjCObjectTL.getNumProtocols() > 0) { |
| 1222 | assert(ObjCObjectTL.getNumProtocols() == Protocols.size())(static_cast <bool> (ObjCObjectTL.getNumProtocols() == Protocols .size()) ? void (0) : __assert_fail ("ObjCObjectTL.getNumProtocols() == Protocols.size()" , "clang/lib/Sema/SemaType.cpp", 1222, __extension__ __PRETTY_FUNCTION__ )); |
| 1223 | ObjCObjectTL.setProtocolLAngleLoc(ProtocolLAngleLoc); |
| 1224 | ObjCObjectTL.setProtocolRAngleLoc(ProtocolRAngleLoc); |
| 1225 | for (unsigned i = 0, n = Protocols.size(); i != n; ++i) |
| 1226 | ObjCObjectTL.setProtocolLoc(i, ProtocolLocs[i]); |
| 1227 | } else { |
| 1228 | ObjCObjectTL.setProtocolLAngleLoc(SourceLocation()); |
| 1229 | ObjCObjectTL.setProtocolRAngleLoc(SourceLocation()); |
| 1230 | } |
| 1231 | |
| 1232 | // Base type. |
| 1233 | ObjCObjectTL.setHasBaseTypeAsWritten(true); |
| 1234 | if (ObjCObjectTL.getType() == T) |
| 1235 | ObjCObjectTL.getBaseLoc().initializeFullCopy(BaseTypeInfo->getTypeLoc()); |
| 1236 | else |
| 1237 | ObjCObjectTL.getBaseLoc().initialize(Context, Loc); |
| 1238 | |
| 1239 | // We're done. Return the completed type to the parser. |
| 1240 | return CreateParsedType(Result, ResultTInfo); |
| 1241 | } |
| 1242 | |
| 1243 | static OpenCLAccessAttr::Spelling |
| 1244 | getImageAccess(const ParsedAttributesView &Attrs) { |
| 1245 | for (const ParsedAttr &AL : Attrs) |
| 1246 | if (AL.getKind() == ParsedAttr::AT_OpenCLAccess) |
| 1247 | return static_cast<OpenCLAccessAttr::Spelling>(AL.getSemanticSpelling()); |
| 1248 | return OpenCLAccessAttr::Keyword_read_only; |
| 1249 | } |
| 1250 | |
| 1251 | static UnaryTransformType::UTTKind |
| 1252 | TSTToUnaryTransformType(DeclSpec::TST SwitchTST) { |
| 1253 | switch (SwitchTST) { |
| 1254 | #define TRANSFORM_TYPE_TRAIT_DEF(Enum, Trait) \ |
| 1255 | case TST_##Trait: \ |
| 1256 | return UnaryTransformType::Enum; |
| 1257 | #include "clang/Basic/TransformTypeTraits.def" |
| 1258 | default: |
| 1259 | llvm_unreachable("attempted to parse a non-unary transform builtin")::llvm::llvm_unreachable_internal("attempted to parse a non-unary transform builtin" , "clang/lib/Sema/SemaType.cpp", 1259); |
| 1260 | } |
| 1261 | } |
| 1262 | |
| 1263 | /// Convert the specified declspec to the appropriate type |
| 1264 | /// object. |
| 1265 | /// \param state Specifies the declarator containing the declaration specifier |
| 1266 | /// to be converted, along with other associated processing state. |
| 1267 | /// \returns The type described by the declaration specifiers. This function |
| 1268 | /// never returns null. |
| 1269 | static QualType ConvertDeclSpecToType(TypeProcessingState &state) { |
| 1270 | // FIXME: Should move the logic from DeclSpec::Finish to here for validity |
| 1271 | // checking. |
| 1272 | |
| 1273 | Sema &S = state.getSema(); |
| 1274 | Declarator &declarator = state.getDeclarator(); |
| 1275 | DeclSpec &DS = declarator.getMutableDeclSpec(); |
| 1276 | SourceLocation DeclLoc = declarator.getIdentifierLoc(); |
| 1277 | if (DeclLoc.isInvalid()) |
| 1278 | DeclLoc = DS.getBeginLoc(); |
| 1279 | |
| 1280 | ASTContext &Context = S.Context; |
| 1281 | |
| 1282 | QualType Result; |
| 1283 | switch (DS.getTypeSpecType()) { |
| 1284 | case DeclSpec::TST_void: |
| 1285 | Result = Context.VoidTy; |
| 1286 | break; |
| 1287 | case DeclSpec::TST_char: |
| 1288 | if (DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified) |
| 1289 | Result = Context.CharTy; |
| 1290 | else if (DS.getTypeSpecSign() == TypeSpecifierSign::Signed) |
| 1291 | Result = Context.SignedCharTy; |
| 1292 | else { |
| 1293 | assert(DS.getTypeSpecSign() == TypeSpecifierSign::Unsigned &&(static_cast <bool> (DS.getTypeSpecSign() == TypeSpecifierSign ::Unsigned && "Unknown TSS value") ? void (0) : __assert_fail ("DS.getTypeSpecSign() == TypeSpecifierSign::Unsigned && \"Unknown TSS value\"" , "clang/lib/Sema/SemaType.cpp", 1294, __extension__ __PRETTY_FUNCTION__ )) |
| 1294 | "Unknown TSS value")(static_cast <bool> (DS.getTypeSpecSign() == TypeSpecifierSign ::Unsigned && "Unknown TSS value") ? void (0) : __assert_fail ("DS.getTypeSpecSign() == TypeSpecifierSign::Unsigned && \"Unknown TSS value\"" , "clang/lib/Sema/SemaType.cpp", 1294, __extension__ __PRETTY_FUNCTION__ )); |
| 1295 | Result = Context.UnsignedCharTy; |
| 1296 | } |
| 1297 | break; |
| 1298 | case DeclSpec::TST_wchar: |
| 1299 | if (DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified) |
| 1300 | Result = Context.WCharTy; |
| 1301 | else if (DS.getTypeSpecSign() == TypeSpecifierSign::Signed) { |
| 1302 | S.Diag(DS.getTypeSpecSignLoc(), diag::ext_wchar_t_sign_spec) |
| 1303 | << DS.getSpecifierName(DS.getTypeSpecType(), |
| 1304 | Context.getPrintingPolicy()); |
| 1305 | Result = Context.getSignedWCharType(); |
| 1306 | } else { |
| 1307 | assert(DS.getTypeSpecSign() == TypeSpecifierSign::Unsigned &&(static_cast <bool> (DS.getTypeSpecSign() == TypeSpecifierSign ::Unsigned && "Unknown TSS value") ? void (0) : __assert_fail ("DS.getTypeSpecSign() == TypeSpecifierSign::Unsigned && \"Unknown TSS value\"" , "clang/lib/Sema/SemaType.cpp", 1308, __extension__ __PRETTY_FUNCTION__ )) |
| 1308 | "Unknown TSS value")(static_cast <bool> (DS.getTypeSpecSign() == TypeSpecifierSign ::Unsigned && "Unknown TSS value") ? void (0) : __assert_fail ("DS.getTypeSpecSign() == TypeSpecifierSign::Unsigned && \"Unknown TSS value\"" , "clang/lib/Sema/SemaType.cpp", 1308, __extension__ __PRETTY_FUNCTION__ )); |
| 1309 | S.Diag(DS.getTypeSpecSignLoc(), diag::ext_wchar_t_sign_spec) |
| 1310 | << DS.getSpecifierName(DS.getTypeSpecType(), |
| 1311 | Context.getPrintingPolicy()); |
| 1312 | Result = Context.getUnsignedWCharType(); |
| 1313 | } |
| 1314 | break; |
| 1315 | case DeclSpec::TST_char8: |
| 1316 | assert(DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified &&(static_cast <bool> (DS.getTypeSpecSign() == TypeSpecifierSign ::Unspecified && "Unknown TSS value") ? void (0) : __assert_fail ("DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"Unknown TSS value\"" , "clang/lib/Sema/SemaType.cpp", 1317, __extension__ __PRETTY_FUNCTION__ )) |
| 1317 | "Unknown TSS value")(static_cast <bool> (DS.getTypeSpecSign() == TypeSpecifierSign ::Unspecified && "Unknown TSS value") ? void (0) : __assert_fail ("DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"Unknown TSS value\"" , "clang/lib/Sema/SemaType.cpp", 1317, __extension__ __PRETTY_FUNCTION__ )); |
| 1318 | Result = Context.Char8Ty; |
| 1319 | break; |
| 1320 | case DeclSpec::TST_char16: |
| 1321 | assert(DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified &&(static_cast <bool> (DS.getTypeSpecSign() == TypeSpecifierSign ::Unspecified && "Unknown TSS value") ? void (0) : __assert_fail ("DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"Unknown TSS value\"" , "clang/lib/Sema/SemaType.cpp", 1322, __extension__ __PRETTY_FUNCTION__ )) |
| 1322 | "Unknown TSS value")(static_cast <bool> (DS.getTypeSpecSign() == TypeSpecifierSign ::Unspecified && "Unknown TSS value") ? void (0) : __assert_fail ("DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"Unknown TSS value\"" , "clang/lib/Sema/SemaType.cpp", 1322, __extension__ __PRETTY_FUNCTION__ )); |
| 1323 | Result = Context.Char16Ty; |
| 1324 | break; |
| 1325 | case DeclSpec::TST_char32: |
| 1326 | assert(DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified &&(static_cast <bool> (DS.getTypeSpecSign() == TypeSpecifierSign ::Unspecified && "Unknown TSS value") ? void (0) : __assert_fail ("DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"Unknown TSS value\"" , "clang/lib/Sema/SemaType.cpp", 1327, __extension__ __PRETTY_FUNCTION__ )) |
| 1327 | "Unknown TSS value")(static_cast <bool> (DS.getTypeSpecSign() == TypeSpecifierSign ::Unspecified && "Unknown TSS value") ? void (0) : __assert_fail ("DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"Unknown TSS value\"" , "clang/lib/Sema/SemaType.cpp", 1327, __extension__ __PRETTY_FUNCTION__ )); |
| 1328 | Result = Context.Char32Ty; |
| 1329 | break; |
| 1330 | case DeclSpec::TST_unspecified: |
| 1331 | // If this is a missing declspec in a block literal return context, then it |
| 1332 | // is inferred from the return statements inside the block. |
| 1333 | // The declspec is always missing in a lambda expr context; it is either |
| 1334 | // specified with a trailing return type or inferred. |
| 1335 | if (S.getLangOpts().CPlusPlus14 && |
| 1336 | declarator.getContext() == DeclaratorContext::LambdaExpr) { |
| 1337 | // In C++1y, a lambda's implicit return type is 'auto'. |
| 1338 | Result = Context.getAutoDeductType(); |
| 1339 | break; |
| 1340 | } else if (declarator.getContext() == DeclaratorContext::LambdaExpr || |
| 1341 | checkOmittedBlockReturnType(S, declarator, |
| 1342 | Context.DependentTy)) { |
| 1343 | Result = Context.DependentTy; |
| 1344 | break; |
| 1345 | } |
| 1346 | |
| 1347 | // Unspecified typespec defaults to int in C90. However, the C90 grammar |
| 1348 | // [C90 6.5] only allows a decl-spec if there was *some* type-specifier, |
| 1349 | // type-qualifier, or storage-class-specifier. If not, emit an extwarn. |
| 1350 | // Note that the one exception to this is function definitions, which are |
| 1351 | // allowed to be completely missing a declspec. This is handled in the |
| 1352 | // parser already though by it pretending to have seen an 'int' in this |
| 1353 | // case. |
| 1354 | if (S.getLangOpts().isImplicitIntRequired()) { |
| 1355 | S.Diag(DeclLoc, diag::warn_missing_type_specifier) |
| 1356 | << DS.getSourceRange() |
| 1357 | << FixItHint::CreateInsertion(DS.getBeginLoc(), "int"); |
| 1358 | } else if (!DS.hasTypeSpecifier()) { |
| 1359 | // C99 and C++ require a type specifier. For example, C99 6.7.2p2 says: |
| 1360 | // "At least one type specifier shall be given in the declaration |
| 1361 | // specifiers in each declaration, and in the specifier-qualifier list in |
| 1362 | // each struct declaration and type name." |
| 1363 | if (!S.getLangOpts().isImplicitIntAllowed() && !DS.isTypeSpecPipe()) { |
| 1364 | S.Diag(DeclLoc, diag::err_missing_type_specifier) |
| 1365 | << DS.getSourceRange(); |
| 1366 | |
| 1367 | // When this occurs, often something is very broken with the value |
| 1368 | // being declared, poison it as invalid so we don't get chains of |
| 1369 | // errors. |
| 1370 | declarator.setInvalidType(true); |
| 1371 | } else if (S.getLangOpts().getOpenCLCompatibleVersion() >= 200 && |
| 1372 | DS.isTypeSpecPipe()) { |
| 1373 | S.Diag(DeclLoc, diag::err_missing_actual_pipe_type) |
| 1374 | << DS.getSourceRange(); |
| 1375 | declarator.setInvalidType(true); |
| 1376 | } else { |
| 1377 | assert(S.getLangOpts().isImplicitIntAllowed() &&(static_cast <bool> (S.getLangOpts().isImplicitIntAllowed () && "implicit int is disabled?") ? void (0) : __assert_fail ("S.getLangOpts().isImplicitIntAllowed() && \"implicit int is disabled?\"" , "clang/lib/Sema/SemaType.cpp", 1378, __extension__ __PRETTY_FUNCTION__ )) |
| 1378 | "implicit int is disabled?")(static_cast <bool> (S.getLangOpts().isImplicitIntAllowed () && "implicit int is disabled?") ? void (0) : __assert_fail ("S.getLangOpts().isImplicitIntAllowed() && \"implicit int is disabled?\"" , "clang/lib/Sema/SemaType.cpp", 1378, __extension__ __PRETTY_FUNCTION__ )); |
| 1379 | S.Diag(DeclLoc, diag::ext_missing_type_specifier) |
| 1380 | << DS.getSourceRange() |
| 1381 | << FixItHint::CreateInsertion(DS.getBeginLoc(), "int"); |
| 1382 | } |
| 1383 | } |
| 1384 | |
| 1385 | [[fallthrough]]; |
| 1386 | case DeclSpec::TST_int: { |
| 1387 | if (DS.getTypeSpecSign() != TypeSpecifierSign::Unsigned) { |
| 1388 | switch (DS.getTypeSpecWidth()) { |
| 1389 | case TypeSpecifierWidth::Unspecified: |
| 1390 | Result = Context.IntTy; |
| 1391 | break; |
| 1392 | case TypeSpecifierWidth::Short: |
| 1393 | Result = Context.ShortTy; |
| 1394 | break; |
| 1395 | case TypeSpecifierWidth::Long: |
| 1396 | Result = Context.LongTy; |
| 1397 | break; |
| 1398 | case TypeSpecifierWidth::LongLong: |
| 1399 | Result = Context.LongLongTy; |
| 1400 | |
| 1401 | // 'long long' is a C99 or C++11 feature. |
| 1402 | if (!S.getLangOpts().C99) { |
| 1403 | if (S.getLangOpts().CPlusPlus) |
| 1404 | S.Diag(DS.getTypeSpecWidthLoc(), |
| 1405 | S.getLangOpts().CPlusPlus11 ? |
| 1406 | diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong); |
| 1407 | else |
| 1408 | S.Diag(DS.getTypeSpecWidthLoc(), diag::ext_c99_longlong); |
| 1409 | } |
| 1410 | break; |
| 1411 | } |
| 1412 | } else { |
| 1413 | switch (DS.getTypeSpecWidth()) { |
| 1414 | case TypeSpecifierWidth::Unspecified: |
| 1415 | Result = Context.UnsignedIntTy; |
| 1416 | break; |
| 1417 | case TypeSpecifierWidth::Short: |
| 1418 | Result = Context.UnsignedShortTy; |
| 1419 | break; |
| 1420 | case TypeSpecifierWidth::Long: |
| 1421 | Result = Context.UnsignedLongTy; |
| 1422 | break; |
| 1423 | case TypeSpecifierWidth::LongLong: |
| 1424 | Result = Context.UnsignedLongLongTy; |
| 1425 | |
| 1426 | // 'long long' is a C99 or C++11 feature. |
| 1427 | if (!S.getLangOpts().C99) { |
| 1428 | if (S.getLangOpts().CPlusPlus) |
| 1429 | S.Diag(DS.getTypeSpecWidthLoc(), |
| 1430 | S.getLangOpts().CPlusPlus11 ? |
| 1431 | diag::warn_cxx98_compat_longlong : diag::ext_cxx11_longlong); |
| 1432 | else |
| 1433 | S.Diag(DS.getTypeSpecWidthLoc(), diag::ext_c99_longlong); |
| 1434 | } |
| 1435 | break; |
| 1436 | } |
| 1437 | } |
| 1438 | break; |
| 1439 | } |
| 1440 | case DeclSpec::TST_bitint: { |
| 1441 | if (!S.Context.getTargetInfo().hasBitIntType()) |
| 1442 | S.Diag(DS.getTypeSpecTypeLoc(), diag::err_type_unsupported) << "_BitInt"; |
| 1443 | Result = |
| 1444 | S.BuildBitIntType(DS.getTypeSpecSign() == TypeSpecifierSign::Unsigned, |
| 1445 | DS.getRepAsExpr(), DS.getBeginLoc()); |
| 1446 | if (Result.isNull()) { |
| 1447 | Result = Context.IntTy; |
| 1448 | declarator.setInvalidType(true); |
| 1449 | } |
| 1450 | break; |
| 1451 | } |
| 1452 | case DeclSpec::TST_accum: { |
| 1453 | switch (DS.getTypeSpecWidth()) { |
| 1454 | case TypeSpecifierWidth::Short: |
| 1455 | Result = Context.ShortAccumTy; |
| 1456 | break; |
| 1457 | case TypeSpecifierWidth::Unspecified: |
| 1458 | Result = Context.AccumTy; |
| 1459 | break; |
| 1460 | case TypeSpecifierWidth::Long: |
| 1461 | Result = Context.LongAccumTy; |
| 1462 | break; |
| 1463 | case TypeSpecifierWidth::LongLong: |
| 1464 | llvm_unreachable("Unable to specify long long as _Accum width")::llvm::llvm_unreachable_internal("Unable to specify long long as _Accum width" , "clang/lib/Sema/SemaType.cpp", 1464); |
| 1465 | } |
| 1466 | |
| 1467 | if (DS.getTypeSpecSign() == TypeSpecifierSign::Unsigned) |
| 1468 | Result = Context.getCorrespondingUnsignedType(Result); |
| 1469 | |
| 1470 | if (DS.isTypeSpecSat()) |
| 1471 | Result = Context.getCorrespondingSaturatedType(Result); |
| 1472 | |
| 1473 | break; |
| 1474 | } |
| 1475 | case DeclSpec::TST_fract: { |
| 1476 | switch (DS.getTypeSpecWidth()) { |
| 1477 | case TypeSpecifierWidth::Short: |
| 1478 | Result = Context.ShortFractTy; |
| 1479 | break; |
| 1480 | case TypeSpecifierWidth::Unspecified: |
| 1481 | Result = Context.FractTy; |
| 1482 | break; |
| 1483 | case TypeSpecifierWidth::Long: |
| 1484 | Result = Context.LongFractTy; |
| 1485 | break; |
| 1486 | case TypeSpecifierWidth::LongLong: |
| 1487 | llvm_unreachable("Unable to specify long long as _Fract width")::llvm::llvm_unreachable_internal("Unable to specify long long as _Fract width" , "clang/lib/Sema/SemaType.cpp", 1487); |
| 1488 | } |
| 1489 | |
| 1490 | if (DS.getTypeSpecSign() == TypeSpecifierSign::Unsigned) |
| 1491 | Result = Context.getCorrespondingUnsignedType(Result); |
| 1492 | |
| 1493 | if (DS.isTypeSpecSat()) |
| 1494 | Result = Context.getCorrespondingSaturatedType(Result); |
| 1495 | |
| 1496 | break; |
| 1497 | } |
| 1498 | case DeclSpec::TST_int128: |
| 1499 | if (!S.Context.getTargetInfo().hasInt128Type() && |
| 1500 | !(S.getLangOpts().SYCLIsDevice || S.getLangOpts().CUDAIsDevice || |
| 1501 | (S.getLangOpts().OpenMP && S.getLangOpts().OpenMPIsDevice))) |
| 1502 | S.Diag(DS.getTypeSpecTypeLoc(), diag::err_type_unsupported) |
| 1503 | << "__int128"; |
| 1504 | if (DS.getTypeSpecSign() == TypeSpecifierSign::Unsigned) |
| 1505 | Result = Context.UnsignedInt128Ty; |
| 1506 | else |
| 1507 | Result = Context.Int128Ty; |
| 1508 | break; |
| 1509 | case DeclSpec::TST_float16: |
| 1510 | // CUDA host and device may have different _Float16 support, therefore |
| 1511 | // do not diagnose _Float16 usage to avoid false alarm. |
| 1512 | // ToDo: more precise diagnostics for CUDA. |
| 1513 | if (!S.Context.getTargetInfo().hasFloat16Type() && !S.getLangOpts().CUDA && |
| 1514 | !(S.getLangOpts().OpenMP && S.getLangOpts().OpenMPIsDevice)) |
| 1515 | S.Diag(DS.getTypeSpecTypeLoc(), diag::err_type_unsupported) |
| 1516 | << "_Float16"; |
| 1517 | Result = Context.Float16Ty; |
| 1518 | break; |
| 1519 | case DeclSpec::TST_half: Result = Context.HalfTy; break; |
| 1520 | case DeclSpec::TST_BFloat16: |
| 1521 | if (!S.Context.getTargetInfo().hasBFloat16Type() && |
| 1522 | !(S.getLangOpts().OpenMP && S.getLangOpts().OpenMPIsDevice) && |
| 1523 | !S.getLangOpts().SYCLIsDevice) |
| 1524 | S.Diag(DS.getTypeSpecTypeLoc(), diag::err_type_unsupported) << "__bf16"; |
| 1525 | Result = Context.BFloat16Ty; |
| 1526 | break; |
| 1527 | case DeclSpec::TST_float: Result = Context.FloatTy; break; |
| 1528 | case DeclSpec::TST_double: |
| 1529 | if (DS.getTypeSpecWidth() == TypeSpecifierWidth::Long) |
| 1530 | Result = Context.LongDoubleTy; |
| 1531 | else |
| 1532 | Result = Context.DoubleTy; |
| 1533 | if (S.getLangOpts().OpenCL) { |
| 1534 | if (!S.getOpenCLOptions().isSupported("cl_khr_fp64", S.getLangOpts())) |
| 1535 | S.Diag(DS.getTypeSpecTypeLoc(), diag::err_opencl_requires_extension) |
| 1536 | << 0 << Result |
| 1537 | << (S.getLangOpts().getOpenCLCompatibleVersion() == 300 |
| 1538 | ? "cl_khr_fp64 and __opencl_c_fp64" |
| 1539 | : "cl_khr_fp64"); |
| 1540 | else if (!S.getOpenCLOptions().isAvailableOption("cl_khr_fp64", S.getLangOpts())) |
| 1541 | S.Diag(DS.getTypeSpecTypeLoc(), diag::ext_opencl_double_without_pragma); |
| 1542 | } |
| 1543 | break; |
| 1544 | case DeclSpec::TST_float128: |
| 1545 | if (!S.Context.getTargetInfo().hasFloat128Type() && |
| 1546 | !S.getLangOpts().SYCLIsDevice && |
| 1547 | !(S.getLangOpts().OpenMP && S.getLangOpts().OpenMPIsDevice)) |
| 1548 | S.Diag(DS.getTypeSpecTypeLoc(), diag::err_type_unsupported) |
| 1549 | << "__float128"; |
| 1550 | Result = Context.Float128Ty; |
| 1551 | break; |
| 1552 | case DeclSpec::TST_ibm128: |
| 1553 | if (!S.Context.getTargetInfo().hasIbm128Type() && |
| 1554 | !S.getLangOpts().SYCLIsDevice && |
| 1555 | !(S.getLangOpts().OpenMP && S.getLangOpts().OpenMPIsDevice)) |
| 1556 | S.Diag(DS.getTypeSpecTypeLoc(), diag::err_type_unsupported) << "__ibm128"; |
| 1557 | Result = Context.Ibm128Ty; |
| 1558 | break; |
| 1559 | case DeclSpec::TST_bool: |
| 1560 | Result = Context.BoolTy; // _Bool or bool |
| 1561 | break; |
| 1562 | case DeclSpec::TST_decimal32: // _Decimal32 |
| 1563 | case DeclSpec::TST_decimal64: // _Decimal64 |
| 1564 | case DeclSpec::TST_decimal128: // _Decimal128 |
| 1565 | S.Diag(DS.getTypeSpecTypeLoc(), diag::err_decimal_unsupported); |
| 1566 | Result = Context.IntTy; |
| 1567 | declarator.setInvalidType(true); |
| 1568 | break; |
| 1569 | case DeclSpec::TST_class: |
| 1570 | case DeclSpec::TST_enum: |
| 1571 | case DeclSpec::TST_union: |
| 1572 | case DeclSpec::TST_struct: |
| 1573 | case DeclSpec::TST_interface: { |
| 1574 | TagDecl *D = dyn_cast_or_null<TagDecl>(DS.getRepAsDecl()); |
| 1575 | if (!D) { |
| 1576 | // This can happen in C++ with ambiguous lookups. |
| 1577 | Result = Context.IntTy; |
| 1578 | declarator.setInvalidType(true); |
| 1579 | break; |
| 1580 | } |
| 1581 | |
| 1582 | // If the type is deprecated or unavailable, diagnose it. |
| 1583 | S.DiagnoseUseOfDecl(D, DS.getTypeSpecTypeNameLoc()); |
| 1584 | |
| 1585 | assert(DS.getTypeSpecWidth() == TypeSpecifierWidth::Unspecified &&(static_cast <bool> (DS.getTypeSpecWidth() == TypeSpecifierWidth ::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && "No qualifiers on tag names!") ? void (0) : __assert_fail ("DS.getTypeSpecWidth() == TypeSpecifierWidth::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"No qualifiers on tag names!\"" , "clang/lib/Sema/SemaType.cpp", 1588, __extension__ __PRETTY_FUNCTION__ )) |
| 1586 | DS.getTypeSpecComplex() == 0 &&(static_cast <bool> (DS.getTypeSpecWidth() == TypeSpecifierWidth ::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && "No qualifiers on tag names!") ? void (0) : __assert_fail ("DS.getTypeSpecWidth() == TypeSpecifierWidth::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"No qualifiers on tag names!\"" , "clang/lib/Sema/SemaType.cpp", 1588, __extension__ __PRETTY_FUNCTION__ )) |
| 1587 | DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified &&(static_cast <bool> (DS.getTypeSpecWidth() == TypeSpecifierWidth ::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && "No qualifiers on tag names!") ? void (0) : __assert_fail ("DS.getTypeSpecWidth() == TypeSpecifierWidth::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"No qualifiers on tag names!\"" , "clang/lib/Sema/SemaType.cpp", 1588, __extension__ __PRETTY_FUNCTION__ )) |
| 1588 | "No qualifiers on tag names!")(static_cast <bool> (DS.getTypeSpecWidth() == TypeSpecifierWidth ::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && "No qualifiers on tag names!") ? void (0) : __assert_fail ("DS.getTypeSpecWidth() == TypeSpecifierWidth::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"No qualifiers on tag names!\"" , "clang/lib/Sema/SemaType.cpp", 1588, __extension__ __PRETTY_FUNCTION__ )); |
| 1589 | |
| 1590 | // TypeQuals handled by caller. |
| 1591 | Result = Context.getTypeDeclType(D); |
| 1592 | |
| 1593 | // In both C and C++, make an ElaboratedType. |
| 1594 | ElaboratedTypeKeyword Keyword |
| 1595 | = ElaboratedType::getKeywordForTypeSpec(DS.getTypeSpecType()); |
| 1596 | Result = S.getElaboratedType(Keyword, DS.getTypeSpecScope(), Result, |
| 1597 | DS.isTypeSpecOwned() ? D : nullptr); |
| 1598 | break; |
| 1599 | } |
| 1600 | case DeclSpec::TST_typename: { |
| 1601 | assert(DS.getTypeSpecWidth() == TypeSpecifierWidth::Unspecified &&(static_cast <bool> (DS.getTypeSpecWidth() == TypeSpecifierWidth ::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && "Can't handle qualifiers on typedef names yet!") ? void (0) : __assert_fail ("DS.getTypeSpecWidth() == TypeSpecifierWidth::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"Can't handle qualifiers on typedef names yet!\"" , "clang/lib/Sema/SemaType.cpp", 1604, __extension__ __PRETTY_FUNCTION__ )) |
| 1602 | DS.getTypeSpecComplex() == 0 &&(static_cast <bool> (DS.getTypeSpecWidth() == TypeSpecifierWidth ::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && "Can't handle qualifiers on typedef names yet!") ? void (0) : __assert_fail ("DS.getTypeSpecWidth() == TypeSpecifierWidth::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"Can't handle qualifiers on typedef names yet!\"" , "clang/lib/Sema/SemaType.cpp", 1604, __extension__ __PRETTY_FUNCTION__ )) |
| 1603 | DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified &&(static_cast <bool> (DS.getTypeSpecWidth() == TypeSpecifierWidth ::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && "Can't handle qualifiers on typedef names yet!") ? void (0) : __assert_fail ("DS.getTypeSpecWidth() == TypeSpecifierWidth::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"Can't handle qualifiers on typedef names yet!\"" , "clang/lib/Sema/SemaType.cpp", 1604, __extension__ __PRETTY_FUNCTION__ )) |
| 1604 | "Can't handle qualifiers on typedef names yet!")(static_cast <bool> (DS.getTypeSpecWidth() == TypeSpecifierWidth ::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && "Can't handle qualifiers on typedef names yet!") ? void (0) : __assert_fail ("DS.getTypeSpecWidth() == TypeSpecifierWidth::Unspecified && DS.getTypeSpecComplex() == 0 && DS.getTypeSpecSign() == TypeSpecifierSign::Unspecified && \"Can't handle qualifiers on typedef names yet!\"" , "clang/lib/Sema/SemaType.cpp", 1604, __extension__ __PRETTY_FUNCTION__ )); |
| 1605 | Result = S.GetTypeFromParser(DS.getRepAsType()); |
| 1606 | if (Result.isNull()) { |
| 1607 | declarator.setInvalidType(true); |
| 1608 | } |
| 1609 | |
| 1610 | // TypeQuals handled by caller. |
| 1611 | break; |
| 1612 | } |
| 1613 | case DeclSpec::TST_typeof_unqualType: |
| 1614 | case DeclSpec::TST_typeofType: |
| 1615 | // FIXME: Preserve type source info. |
| 1616 | Result = S.GetTypeFromParser(DS.getRepAsType()); |
| 1617 | assert(!Result.isNull() && "Didn't get a type for typeof?")(static_cast <bool> (!Result.isNull() && "Didn't get a type for typeof?" ) ? void (0) : __assert_fail ("!Result.isNull() && \"Didn't get a type for typeof?\"" , "clang/lib/Sema/SemaType.cpp", 1617, __extension__ __PRETTY_FUNCTION__ )); |
| 1618 | if (!Result->isDependentType()) |
| 1619 | if (const TagType *TT = Result->getAs<TagType>()) |
| 1620 | S.DiagnoseUseOfDecl(TT->getDecl(), DS.getTypeSpecTypeLoc()); |
| 1621 | // TypeQuals handled by caller. |
| 1622 | Result = Context.getTypeOfType( |
| 1623 | Result, DS.getTypeSpecType() == DeclSpec::TST_typeof_unqualType |
| 1624 | ? TypeOfKind::Unqualified |
| 1625 | : TypeOfKind::Qualified); |
| 1626 | break; |
| 1627 | case DeclSpec::TST_typeof_unqualExpr: |
| 1628 | case DeclSpec::TST_typeofExpr: { |
| 1629 | Expr *E = DS.getRepAsExpr(); |
| 1630 | assert(E && "Didn't get an expression for typeof?")(static_cast <bool> (E && "Didn't get an expression for typeof?" ) ? void (0) : __assert_fail ("E && \"Didn't get an expression for typeof?\"" , "clang/lib/Sema/SemaType.cpp", 1630, __extension__ __PRETTY_FUNCTION__ )); |
| 1631 | // TypeQuals handled by caller. |
| 1632 | Result = S.BuildTypeofExprType(E, DS.getTypeSpecType() == |
| 1633 | DeclSpec::TST_typeof_unqualExpr |
| 1634 | ? TypeOfKind::Unqualified |
| 1635 | : TypeOfKind::Qualified); |
| 1636 | if (Result.isNull()) { |
| 1637 | Result = Context.IntTy; |
| 1638 | declarator.setInvalidType(true); |
| 1639 | } |
| 1640 | break; |
| 1641 | } |
| 1642 | case DeclSpec::TST_decltype: { |
| 1643 | Expr *E = DS.getRepAsExpr(); |
| 1644 | assert(E && "Didn't get an expression for decltype?")(static_cast <bool> (E && "Didn't get an expression for decltype?" ) ? void (0) : __assert_fail ("E && \"Didn't get an expression for decltype?\"" , "clang/lib/Sema/SemaType.cpp", 1644, __extension__ __PRETTY_FUNCTION__ )); |
| 1645 | // TypeQuals handled by caller. |
| 1646 | Result = S.BuildDecltypeType(E); |
| 1647 | if (Result.isNull()) { |
| 1648 | Result = Context.IntTy; |
| 1649 | declarator.setInvalidType(true); |
| 1650 | } |
| 1651 | break; |
| 1652 | } |
| 1653 | #define TRANSFORM_TYPE_TRAIT_DEF(_, Trait) case DeclSpec::TST_##Trait: |
| 1654 | #include "clang/Basic/TransformTypeTraits.def" |
| 1655 | Result = S.GetTypeFromParser(DS.getRepAsType()); |
| 1656 | assert(!Result.isNull() && "Didn't get a type for the transformation?")(static_cast <bool> (!Result.isNull() && "Didn't get a type for the transformation?" ) ? void (0) : __assert_fail ("!Result.isNull() && \"Didn't get a type for the transformation?\"" , "clang/lib/Sema/SemaType.cpp", 1656, __extension__ __PRETTY_FUNCTION__ )); |
| 1657 | Result = S.BuildUnaryTransformType( |
| 1658 | Result, TSTToUnaryTransformType(DS.getTypeSpecType()), |
| 1659 | DS.getTypeSpecTypeLoc()); |
| 1660 | if (Result.isNull()) { |
| 1661 | Result = Context.IntTy; |
| 1662 | declarator.setInvalidType(true); |
| 1663 | } |
| 1664 | break; |
| 1665 | |
| 1666 | case DeclSpec::TST_auto: |
| 1667 | case DeclSpec::TST_decltype_auto: { |
| 1668 | auto AutoKW = DS.getTypeSpecType() == DeclSpec::TST_decltype_auto |
| 1669 | ? AutoTypeKeyword::DecltypeAuto |
| 1670 | : AutoTypeKeyword::Auto; |
| 1671 | |
| 1672 | ConceptDecl *TypeConstraintConcept = nullptr; |
| 1673 | llvm::SmallVector<TemplateArgument, 8> TemplateArgs; |
| 1674 | if (DS.isConstrainedAuto()) { |
| 1675 | if (TemplateIdAnnotation *TemplateId = DS.getRepAsTemplateId()) { |
| 1676 | TypeConstraintConcept = |
| 1677 | cast<ConceptDecl>(TemplateId->Template.get().getAsTemplateDecl()); |
| 1678 | TemplateArgumentListInfo TemplateArgsInfo; |
| 1679 | TemplateArgsInfo.setLAngleLoc(TemplateId->LAngleLoc); |
| 1680 | TemplateArgsInfo.setRAngleLoc(TemplateId->RAngleLoc); |
| 1681 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), |
| 1682 | TemplateId->NumArgs); |
| 1683 | S.translateTemplateArguments(TemplateArgsPtr, TemplateArgsInfo); |
| 1684 | for (const auto &ArgLoc : TemplateArgsInfo.arguments()) |
| 1685 | TemplateArgs.push_back(ArgLoc.getArgument()); |
| 1686 | } else { |
| 1687 | declarator.setInvalidType(true); |
| 1688 | } |
| 1689 | } |
| 1690 | Result = S.Context.getAutoType(QualType(), AutoKW, |
| 1691 | /*IsDependent*/ false, /*IsPack=*/false, |
| 1692 | TypeConstraintConcept, TemplateArgs); |
| 1693 | break; |
| 1694 | } |
| 1695 | |
| 1696 | case DeclSpec::TST_auto_type: |
| 1697 | Result = Context.getAutoType(QualType(), AutoTypeKeyword::GNUAutoType, false); |
| 1698 | break; |
| 1699 | |
| 1700 | case DeclSpec::TST_unknown_anytype: |
| 1701 | Result = Context.UnknownAnyTy; |
| 1702 | break; |
| 1703 | |
| 1704 | case DeclSpec::TST_atomic: |
| 1705 | Result = S.GetTypeFromParser(DS.getRepAsType()); |
| 1706 | assert(!Result.isNull() && "Didn't get a type for _Atomic?")(static_cast <bool> (!Result.isNull() && "Didn't get a type for _Atomic?" ) ? void (0) : __assert_fail ("!Result.isNull() && \"Didn't get a type for _Atomic?\"" , "clang/lib/Sema/SemaType.cpp", 1706, __extension__ __PRETTY_FUNCTION__ )); |
| 1707 | Result = S.BuildAtomicType(Result, DS.getTypeSpecTypeLoc()); |
| 1708 | if (Result.isNull()) { |
| 1709 | Result = Context.IntTy; |
| 1710 | declarator.setInvalidType(true); |
| 1711 | } |
| 1712 | break; |
| 1713 | |
| 1714 | #define GENERIC_IMAGE_TYPE(ImgType, Id) \ |
| 1715 | case DeclSpec::TST_##ImgType##_t: \ |
| 1716 | switch (getImageAccess(DS.getAttributes())) { \ |
| 1717 | case OpenCLAccessAttr::Keyword_write_only: \ |
| 1718 | Result = Context.Id##WOTy; \ |
| 1719 | break; \ |
| 1720 | case OpenCLAccessAttr::Keyword_read_write: \ |
| 1721 | Result = Context.Id##RWTy; \ |
| 1722 | break; \ |
| 1723 | case OpenCLAccessAttr::Keyword_read_only: \ |
| 1724 | Result = Context.Id##ROTy; \ |
| 1725 | break; \ |
| 1726 | case OpenCLAccessAttr::SpellingNotCalculated: \ |
| 1727 | llvm_unreachable("Spelling not yet calculated")::llvm::llvm_unreachable_internal("Spelling not yet calculated" , "clang/lib/Sema/SemaType.cpp", 1727); \ |
| 1728 | } \ |
| 1729 | break; |
| 1730 | #include "clang/Basic/OpenCLImageTypes.def" |
| 1731 | |
| 1732 | case DeclSpec::TST_error: |
| 1733 | Result = Context.IntTy; |
| 1734 | declarator.setInvalidType(true); |
| 1735 | break; |
| 1736 | } |
| 1737 | |
| 1738 | // FIXME: we want resulting declarations to be marked invalid, but claiming |
| 1739 | // the type is invalid is too strong - e.g. it causes ActOnTypeName to return |
| 1740 | // a null type. |
| 1741 | if (Result->containsErrors()) |
| 1742 | declarator.setInvalidType(); |
| 1743 | |
| 1744 | if (S.getLangOpts().OpenCL) { |
| 1745 | const auto &OpenCLOptions = S.getOpenCLOptions(); |
| 1746 | bool IsOpenCLC30Compatible = |
| 1747 | S.getLangOpts().getOpenCLCompatibleVersion() == 300; |
| 1748 | // OpenCL C v3.0 s6.3.3 - OpenCL image types require __opencl_c_images |
| 1749 | // support. |
| 1750 | // OpenCL C v3.0 s6.2.1 - OpenCL 3d image write types requires support |
| 1751 | // for OpenCL C 2.0, or OpenCL C 3.0 or newer and the |
| 1752 | // __opencl_c_3d_image_writes feature. OpenCL C v3.0 API s4.2 - For devices |
| 1753 | // that support OpenCL 3.0, cl_khr_3d_image_writes must be returned when and |
| 1754 | // only when the optional feature is supported |
| 1755 | if ((Result->isImageType() || Result->isSamplerT()) && |
| 1756 | (IsOpenCLC30Compatible && |
| 1757 | !OpenCLOptions.isSupported("__opencl_c_images", S.getLangOpts()))) { |
| 1758 | S.Diag(DS.getTypeSpecTypeLoc(), diag::err_opencl_requires_extension) |
| 1759 | << 0 << Result << "__opencl_c_images"; |
| 1760 | declarator.setInvalidType(); |
| 1761 | } else if (Result->isOCLImage3dWOType() && |
| 1762 | !OpenCLOptions.isSupported("cl_khr_3d_image_writes", |
| 1763 | S.getLangOpts())) { |
| 1764 | S.Diag(DS.getTypeSpecTypeLoc(), diag::err_opencl_requires_extension) |
| 1765 | << 0 << Result |
| 1766 | << (IsOpenCLC30Compatible |
| 1767 | ? "cl_khr_3d_image_writes and __opencl_c_3d_image_writes" |
| 1768 | : "cl_khr_3d_image_writes"); |
| 1769 | declarator.setInvalidType(); |
| 1770 | } |
| 1771 | } |
| 1772 | |
| 1773 | bool IsFixedPointType = DS.getTypeSpecType() == DeclSpec::TST_accum || |
| 1774 | DS.getTypeSpecType() == DeclSpec::TST_fract; |
| 1775 | |
| 1776 | // Only fixed point types can be saturated |
| 1777 | if (DS.isTypeSpecSat() && !IsFixedPointType) |
| 1778 | S.Diag(DS.getTypeSpecSatLoc(), diag::err_invalid_saturation_spec) |
| 1779 | << DS.getSpecifierName(DS.getTypeSpecType(), |
| 1780 | Context.getPrintingPolicy()); |
| 1781 | |
| 1782 | // Handle complex types. |
| 1783 | if (DS.getTypeSpecComplex() == DeclSpec::TSC_complex) { |
| 1784 | if (S.getLangOpts().Freestanding) |
| 1785 | S.Diag(DS.getTypeSpecComplexLoc(), diag::ext_freestanding_complex); |
| 1786 | Result = Context.getComplexType(Result); |
| 1787 | } else if (DS.isTypeAltiVecVector()) { |
| 1788 | unsigned typeSize = static_cast<unsigned>(Context.getTypeSize(Result)); |
| 1789 | assert(typeSize > 0 && "type size for vector must be greater than 0 bits")(static_cast <bool> (typeSize > 0 && "type size for vector must be greater than 0 bits" ) ? void (0) : __assert_fail ("typeSize > 0 && \"type size for vector must be greater than 0 bits\"" , "clang/lib/Sema/SemaType.cpp", 1789, __extension__ __PRETTY_FUNCTION__ )); |
| 1790 | VectorType::VectorKind VecKind = VectorType::AltiVecVector; |
| 1791 | if (DS.isTypeAltiVecPixel()) |
| 1792 | VecKind = VectorType::AltiVecPixel; |
| 1793 | else if (DS.isTypeAltiVecBool()) |
| 1794 | VecKind = VectorType::AltiVecBool; |
| 1795 | Result = Context.getVectorType(Result, 128/typeSize, VecKind); |
| 1796 | } |
| 1797 | |
| 1798 | // FIXME: Imaginary. |
| 1799 | if (DS.getTypeSpecComplex() == DeclSpec::TSC_imaginary) |
| 1800 | S.Diag(DS.getTypeSpecComplexLoc(), diag::err_imaginary_not_supported); |
| 1801 | |
| 1802 | // Before we process any type attributes, synthesize a block literal |
| 1803 | // function declarator if necessary. |
| 1804 | if (declarator.getContext() == DeclaratorContext::BlockLiteral) |
| 1805 | maybeSynthesizeBlockSignature(state, Result); |
| 1806 | |
| 1807 | // Apply any type attributes from the decl spec. This may cause the |
| 1808 | // list of type attributes to be temporarily saved while the type |
| 1809 | // attributes are pushed around. |
| 1810 | // pipe attributes will be handled later ( at GetFullTypeForDeclarator ) |
| 1811 | if (!DS.isTypeSpecPipe()) { |
| 1812 | // We also apply declaration attributes that "slide" to the decl spec. |
| 1813 | // Ordering can be important for attributes. The decalaration attributes |
| 1814 | // come syntactically before the decl spec attributes, so we process them |
| 1815 | // in that order. |
| 1816 | ParsedAttributesView SlidingAttrs; |
| 1817 | for (ParsedAttr &AL : declarator.getDeclarationAttributes()) { |
| 1818 | if (AL.slidesFromDeclToDeclSpecLegacyBehavior()) { |
| 1819 | SlidingAttrs.addAtEnd(&AL); |
| 1820 | |
| 1821 | // For standard syntax attributes, which would normally appertain to the |
| 1822 | // declaration here, suggest moving them to the type instead. But only |
| 1823 | // do this for our own vendor attributes; moving other vendors' |
| 1824 | // attributes might hurt portability. |
| 1825 | // There's one special case that we need to deal with here: The |
| 1826 | // `MatrixType` attribute may only be used in a typedef declaration. If |
| 1827 | // it's being used anywhere else, don't output the warning as |
| 1828 | // ProcessDeclAttributes() will output an error anyway. |
| 1829 | if (AL.isStandardAttributeSyntax() && AL.isClangScope() && |
| 1830 | !(AL.getKind() == ParsedAttr::AT_MatrixType && |
| 1831 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef)) { |
| 1832 | S.Diag(AL.getLoc(), diag::warn_type_attribute_deprecated_on_decl) |
| 1833 | << AL; |
| 1834 | } |
| 1835 | } |
| 1836 | } |
| 1837 | // During this call to processTypeAttrs(), |
| 1838 | // TypeProcessingState::getCurrentAttributes() will erroneously return a |
| 1839 | // reference to the DeclSpec attributes, rather than the declaration |
| 1840 | // attributes. However, this doesn't matter, as getCurrentAttributes() |
| 1841 | // is only called when distributing attributes from one attribute list |
| 1842 | // to another. Declaration attributes are always C++11 attributes, and these |
| 1843 | // are never distributed. |
| 1844 | processTypeAttrs(state, Result, TAL_DeclSpec, SlidingAttrs); |
| 1845 | processTypeAttrs(state, Result, TAL_DeclSpec, DS.getAttributes()); |
| 1846 | } |
| 1847 | |
| 1848 | // Apply const/volatile/restrict qualifiers to T. |
| 1849 | if (unsigned TypeQuals = DS.getTypeQualifiers()) { |
| 1850 | // Warn about CV qualifiers on function types. |
| 1851 | // C99 6.7.3p8: |
| 1852 | // If the specification of a function type includes any type qualifiers, |
| 1853 | // the behavior is undefined. |
| 1854 | // C++11 [dcl.fct]p7: |
| 1855 | // The effect of a cv-qualifier-seq in a function declarator is not the |
| 1856 | // same as adding cv-qualification on top of the function type. In the |
| 1857 | // latter case, the cv-qualifiers are ignored. |
| 1858 | if (Result->isFunctionType()) { |
| 1859 | diagnoseAndRemoveTypeQualifiers( |
| 1860 | S, DS, TypeQuals, Result, DeclSpec::TQ_const | DeclSpec::TQ_volatile, |
| 1861 | S.getLangOpts().CPlusPlus |
| 1862 | ? diag::warn_typecheck_function_qualifiers_ignored |
| 1863 | : diag::warn_typecheck_function_qualifiers_unspecified); |
| 1864 | // No diagnostic for 'restrict' or '_Atomic' applied to a |
| 1865 | // function type; we'll diagnose those later, in BuildQualifiedType. |
| 1866 | } |
| 1867 | |
| 1868 | // C++11 [dcl.ref]p1: |
| 1869 | // Cv-qualified references are ill-formed except when the |
| 1870 | // cv-qualifiers are introduced through the use of a typedef-name |
| 1871 | // or decltype-specifier, in which case the cv-qualifiers are ignored. |
| 1872 | // |
| 1873 | // There don't appear to be any other contexts in which a cv-qualified |
| 1874 | // reference type could be formed, so the 'ill-formed' clause here appears |
| 1875 | // to never happen. |
| 1876 | if (TypeQuals && Result->isReferenceType()) { |
| 1877 | diagnoseAndRemoveTypeQualifiers( |
| 1878 | S, DS, TypeQuals, Result, |
| 1879 | DeclSpec::TQ_const | DeclSpec::TQ_volatile | DeclSpec::TQ_atomic, |
| 1880 | diag::warn_typecheck_reference_qualifiers); |
| 1881 | } |
| 1882 | |
| 1883 | // C90 6.5.3 constraints: "The same type qualifier shall not appear more |
| 1884 | // than once in the same specifier-list or qualifier-list, either directly |
| 1885 | // or via one or more typedefs." |
| 1886 | if (!S.getLangOpts().C99 && !S.getLangOpts().CPlusPlus |
| 1887 | && TypeQuals & Result.getCVRQualifiers()) { |
| 1888 | if (TypeQuals & DeclSpec::TQ_const && Result.isConstQualified()) { |
| 1889 | S.Diag(DS.getConstSpecLoc(), diag::ext_duplicate_declspec) |
| 1890 | << "const"; |
| 1891 | } |
| 1892 | |
| 1893 | if (TypeQuals & DeclSpec::TQ_volatile && Result.isVolatileQualified()) { |
| 1894 | S.Diag(DS.getVolatileSpecLoc(), diag::ext_duplicate_declspec) |
| 1895 | << "volatile"; |
| 1896 | } |
| 1897 | |
| 1898 | // C90 doesn't have restrict nor _Atomic, so it doesn't force us to |
| 1899 | // produce a warning in this case. |
| 1900 | } |
| 1901 | |
| 1902 | QualType Qualified = S.BuildQualifiedType(Result, DeclLoc, TypeQuals, &DS); |
| 1903 | |
| 1904 | // If adding qualifiers fails, just use the unqualified type. |
| 1905 | if (Qualified.isNull()) |
| 1906 | declarator.setInvalidType(true); |
| 1907 | else |
| 1908 | Result = Qualified; |
| 1909 | } |
| 1910 | |
| 1911 | assert(!Result.isNull() && "This function should not return a null type")(static_cast <bool> (!Result.isNull() && "This function should not return a null type" ) ? void (0) : __assert_fail ("!Result.isNull() && \"This function should not return a null type\"" , "clang/lib/Sema/SemaType.cpp", 1911, __extension__ __PRETTY_FUNCTION__ )); |
| 1912 | return Result; |
| 1913 | } |
| 1914 | |
| 1915 | static std::string getPrintableNameForEntity(DeclarationName Entity) { |
| 1916 | if (Entity) |
| 1917 | return Entity.getAsString(); |
| 1918 | |
| 1919 | return "type name"; |
| 1920 | } |
| 1921 | |
| 1922 | static bool isDependentOrGNUAutoType(QualType T) { |
| 1923 | if (T->isDependentType()) |
| 1924 | return true; |
| 1925 | |
| 1926 | const auto *AT = dyn_cast<AutoType>(T); |
| 1927 | return AT && AT->isGNUAutoType(); |
| 1928 | } |
| 1929 | |
| 1930 | QualType Sema::BuildQualifiedType(QualType T, SourceLocation Loc, |
| 1931 | Qualifiers Qs, const DeclSpec *DS) { |
| 1932 | if (T.isNull()) |
| 1933 | return QualType(); |
| 1934 | |
| 1935 | // Ignore any attempt to form a cv-qualified reference. |
| 1936 | if (T->isReferenceType()) { |
| 1937 | Qs.removeConst(); |
| 1938 | Qs.removeVolatile(); |
| 1939 | } |
| 1940 | |
| 1941 | // Enforce C99 6.7.3p2: "Types other than pointer types derived from |
| 1942 | // object or incomplete types shall not be restrict-qualified." |
| 1943 | if (Qs.hasRestrict()) { |
| 1944 | unsigned DiagID = 0; |
| 1945 | QualType ProblemTy; |
| 1946 | |
| 1947 | if (T->isAnyPointerType() || T->isReferenceType() || |
| 1948 | T->isMemberPointerType()) { |
| 1949 | QualType EltTy; |
| 1950 | if (T->isObjCObjectPointerType()) |
| 1951 | EltTy = T; |
| 1952 | else if (const MemberPointerType *PTy = T->getAs<MemberPointerType>()) |
| 1953 | EltTy = PTy->getPointeeType(); |
| 1954 | else |
| 1955 | EltTy = T->getPointeeType(); |
| 1956 | |
| 1957 | // If we have a pointer or reference, the pointee must have an object |
| 1958 | // incomplete type. |
| 1959 | if (!EltTy->isIncompleteOrObjectType()) { |
| 1960 | DiagID = diag::err_typecheck_invalid_restrict_invalid_pointee; |
| 1961 | ProblemTy = EltTy; |
| 1962 | } |
| 1963 | } else if (!isDependentOrGNUAutoType(T)) { |
| 1964 | // For an __auto_type variable, we may not have seen the initializer yet |
| 1965 | // and so have no idea whether the underlying type is a pointer type or |
| 1966 | // not. |
| 1967 | DiagID = diag::err_typecheck_invalid_restrict_not_pointer; |
| 1968 | ProblemTy = T; |
| 1969 | } |
| 1970 | |
| 1971 | if (DiagID) { |
| 1972 | Diag(DS ? DS->getRestrictSpecLoc() : Loc, DiagID) << ProblemTy; |
| 1973 | Qs.removeRestrict(); |
| 1974 | } |
| 1975 | } |
| 1976 | |
| 1977 | return Context.getQualifiedType(T, Qs); |
| 1978 | } |
| 1979 | |
| 1980 | QualType Sema::BuildQualifiedType(QualType T, SourceLocation Loc, |
| 1981 | unsigned CVRAU, const DeclSpec *DS) { |
| 1982 | if (T.isNull()) |
| 1983 | return QualType(); |
| 1984 | |
| 1985 | // Ignore any attempt to form a cv-qualified reference. |
| 1986 | if (T->isReferenceType()) |
| 1987 | CVRAU &= |
| 1988 | ~(DeclSpec::TQ_const | DeclSpec::TQ_volatile | DeclSpec::TQ_atomic); |
| 1989 | |
| 1990 | // Convert from DeclSpec::TQ to Qualifiers::TQ by just dropping TQ_atomic and |
| 1991 | // TQ_unaligned; |
| 1992 | unsigned CVR = CVRAU & ~(DeclSpec::TQ_atomic | DeclSpec::TQ_unaligned); |
| 1993 | |
| 1994 | // C11 6.7.3/5: |
| 1995 | // If the same qualifier appears more than once in the same |
| 1996 | // specifier-qualifier-list, either directly or via one or more typedefs, |
| 1997 | // the behavior is the same as if it appeared only once. |
| 1998 | // |
| 1999 | // It's not specified what happens when the _Atomic qualifier is applied to |
| 2000 | // a type specified with the _Atomic specifier, but we assume that this |
| 2001 | // should be treated as if the _Atomic qualifier appeared multiple times. |
| 2002 | if (CVRAU & DeclSpec::TQ_atomic && !T->isAtomicType()) { |
| 2003 | // C11 6.7.3/5: |
| 2004 | // If other qualifiers appear along with the _Atomic qualifier in a |
| 2005 | // specifier-qualifier-list, the resulting type is the so-qualified |
| 2006 | // atomic type. |
| 2007 | // |
| 2008 | // Don't need to worry about array types here, since _Atomic can't be |
| 2009 | // applied to such types. |
| 2010 | SplitQualType Split = T.getSplitUnqualifiedType(); |
| 2011 | T = BuildAtomicType(QualType(Split.Ty, 0), |
| 2012 | DS ? DS->getAtomicSpecLoc() : Loc); |
| 2013 | if (T.isNull()) |
| 2014 | return T; |
| 2015 | Split.Quals.addCVRQualifiers(CVR); |
| 2016 | return BuildQualifiedType(T, Loc, Split.Quals); |
| 2017 | } |
| 2018 | |
| 2019 | Qualifiers Q = Qualifiers::fromCVRMask(CVR); |
| 2020 | Q.setUnaligned(CVRAU & DeclSpec::TQ_unaligned); |
| 2021 | return BuildQualifiedType(T, Loc, Q, DS); |
| 2022 | } |
| 2023 | |
| 2024 | /// Build a paren type including \p T. |
| 2025 | QualType Sema::BuildParenType(QualType T) { |
| 2026 | return Context.getParenType(T); |
| 2027 | } |
| 2028 | |
| 2029 | /// Given that we're building a pointer or reference to the given |
| 2030 | static QualType inferARCLifetimeForPointee(Sema &S, QualType type, |
| 2031 | SourceLocation loc, |
| 2032 | bool isReference) { |
| 2033 | // Bail out if retention is unrequired or already specified. |
| 2034 | if (!type->isObjCLifetimeType() || |
| 2035 | type.getObjCLifetime() != Qualifiers::OCL_None) |
| 2036 | return type; |
| 2037 | |
| 2038 | Qualifiers::ObjCLifetime implicitLifetime = Qualifiers::OCL_None; |
| 2039 | |
| 2040 | // If the object type is const-qualified, we can safely use |
| 2041 | // __unsafe_unretained. This is safe (because there are no read |
| 2042 | // barriers), and it'll be safe to coerce anything but __weak* to |
| 2043 | // the resulting type. |
| 2044 | if (type.isConstQualified()) { |
| 2045 | implicitLifetime = Qualifiers::OCL_ExplicitNone; |
| 2046 | |
| 2047 | // Otherwise, check whether the static type does not require |
| 2048 | // retaining. This currently only triggers for Class (possibly |
| 2049 | // protocol-qualifed, and arrays thereof). |
| 2050 | } else if (type->isObjCARCImplicitlyUnretainedType()) { |
| 2051 | implicitLifetime = Qualifiers::OCL_ExplicitNone; |
| 2052 | |
| 2053 | // If we are in an unevaluated context, like sizeof, skip adding a |
| 2054 | // qualification. |
| 2055 | } else if (S.isUnevaluatedContext()) { |
| 2056 | return type; |
| 2057 | |
| 2058 | // If that failed, give an error and recover using __strong. __strong |
| 2059 | // is the option most likely to prevent spurious second-order diagnostics, |
| 2060 | // like when binding a reference to a field. |
| 2061 | } else { |
| 2062 | // These types can show up in private ivars in system headers, so |
| 2063 | // we need this to not be an error in those cases. Instead we |
| 2064 | // want to delay. |
| 2065 | if (S.DelayedDiagnostics.shouldDelayDiagnostics()) { |
| 2066 | S.DelayedDiagnostics.add( |
| 2067 | sema::DelayedDiagnostic::makeForbiddenType(loc, |
| 2068 | diag::err_arc_indirect_no_ownership, type, isReference)); |
| 2069 | } else { |
| 2070 | S.Diag(loc, diag::err_arc_indirect_no_ownership) << type << isReference; |
| 2071 | } |
| 2072 | implicitLifetime = Qualifiers::OCL_Strong; |
| 2073 | } |
| 2074 | assert(implicitLifetime && "didn't infer any lifetime!")(static_cast <bool> (implicitLifetime && "didn't infer any lifetime!" ) ? void (0) : __assert_fail ("implicitLifetime && \"didn't infer any lifetime!\"" , "clang/lib/Sema/SemaType.cpp", 2074, __extension__ __PRETTY_FUNCTION__ )); |
| 2075 | |
| 2076 | Qualifiers qs; |
| 2077 | qs.addObjCLifetime(implicitLifetime); |
| 2078 | return S.Context.getQualifiedType(type, qs); |
| 2079 | } |
| 2080 | |
| 2081 | static std::string getFunctionQualifiersAsString(const FunctionProtoType *FnTy){ |
| 2082 | std::string Quals = FnTy->getMethodQuals().getAsString(); |
| 2083 | |
| 2084 | switch (FnTy->getRefQualifier()) { |
| 2085 | case RQ_None: |
| 2086 | break; |
| 2087 | |
| 2088 | case RQ_LValue: |
| 2089 | if (!Quals.empty()) |
| 2090 | Quals += ' '; |
| 2091 | Quals += '&'; |
| 2092 | break; |
| 2093 | |
| 2094 | case RQ_RValue: |
| 2095 | if (!Quals.empty()) |
| 2096 | Quals += ' '; |
| 2097 | Quals += "&&"; |
| 2098 | break; |
| 2099 | } |
| 2100 | |
| 2101 | return Quals; |
| 2102 | } |
| 2103 | |
| 2104 | namespace { |
| 2105 | /// Kinds of declarator that cannot contain a qualified function type. |
| 2106 | /// |
| 2107 | /// C++98 [dcl.fct]p4 / C++11 [dcl.fct]p6: |
| 2108 | /// a function type with a cv-qualifier or a ref-qualifier can only appear |
| 2109 | /// at the topmost level of a type. |
| 2110 | /// |
| 2111 | /// Parens and member pointers are permitted. We don't diagnose array and |
| 2112 | /// function declarators, because they don't allow function types at all. |
| 2113 | /// |
| 2114 | /// The values of this enum are used in diagnostics. |
| 2115 | enum QualifiedFunctionKind { QFK_BlockPointer, QFK_Pointer, QFK_Reference }; |
| 2116 | } // end anonymous namespace |
| 2117 | |
| 2118 | /// Check whether the type T is a qualified function type, and if it is, |
| 2119 | /// diagnose that it cannot be contained within the given kind of declarator. |
| 2120 | static bool checkQualifiedFunction(Sema &S, QualType T, SourceLocation Loc, |
| 2121 | QualifiedFunctionKind QFK) { |
| 2122 | // Does T refer to a function type with a cv-qualifier or a ref-qualifier? |
| 2123 | const FunctionProtoType *FPT = T->getAs<FunctionProtoType>(); |
| 2124 | if (!FPT || |
| 2125 | (FPT->getMethodQuals().empty() && FPT->getRefQualifier() == RQ_None)) |
| 2126 | return false; |
| 2127 | |
| 2128 | S.Diag(Loc, diag::err_compound_qualified_function_type) |
| 2129 | << QFK << isa<FunctionType>(T.IgnoreParens()) << T |
| 2130 | << getFunctionQualifiersAsString(FPT); |
| 2131 | return true; |
| 2132 | } |
| 2133 | |
| 2134 | bool Sema::CheckQualifiedFunctionForTypeId(QualType T, SourceLocation Loc) { |
| 2135 | const FunctionProtoType *FPT = T->getAs<FunctionProtoType>(); |
| 2136 | if (!FPT || |
| 2137 | (FPT->getMethodQuals().empty() && FPT->getRefQualifier() == RQ_None)) |
| 2138 | return false; |
| 2139 | |
| 2140 | Diag(Loc, diag::err_qualified_function_typeid) |
| 2141 | << T << getFunctionQualifiersAsString(FPT); |
| 2142 | return true; |
| 2143 | } |
| 2144 | |
| 2145 | // Helper to deduce addr space of a pointee type in OpenCL mode. |
| 2146 | static QualType deduceOpenCLPointeeAddrSpace(Sema &S, QualType PointeeType) { |
| 2147 | if (!PointeeType->isUndeducedAutoType() && !PointeeType->isDependentType() && |
| 2148 | !PointeeType->isSamplerT() && |
| 2149 | !PointeeType.hasAddressSpace()) |
| 2150 | PointeeType = S.getASTContext().getAddrSpaceQualType( |
| 2151 | PointeeType, S.getASTContext().getDefaultOpenCLPointeeAddrSpace()); |
| 2152 | return PointeeType; |
| 2153 | } |
| 2154 | |
| 2155 | /// Build a pointer type. |
| 2156 | /// |
| 2157 | /// \param T The type to which we'll be building a pointer. |
| 2158 | /// |
| 2159 | /// \param Loc The location of the entity whose type involves this |
| 2160 | /// pointer type or, if there is no such entity, the location of the |
| 2161 | /// type that will have pointer type. |
| 2162 | /// |
| 2163 | /// \param Entity The name of the entity that involves the pointer |
| 2164 | /// type, if known. |
| 2165 | /// |
| 2166 | /// \returns A suitable pointer type, if there are no |
| 2167 | /// errors. Otherwise, returns a NULL type. |
| 2168 | QualType Sema::BuildPointerType(QualType T, |
| 2169 | SourceLocation Loc, DeclarationName Entity) { |
| 2170 | if (T->isReferenceType()) { |
| 2171 | // C++ 8.3.2p4: There shall be no ... pointers to references ... |
| 2172 | Diag(Loc, diag::err_illegal_decl_pointer_to_reference) |
| 2173 | << getPrintableNameForEntity(Entity) << T; |
| 2174 | return QualType(); |
| 2175 | } |
| 2176 | |
| 2177 | if (T->isFunctionType() && getLangOpts().OpenCL && |
| 2178 | !getOpenCLOptions().isAvailableOption("__cl_clang_function_pointers", |
| 2179 | getLangOpts())) { |
| 2180 | Diag(Loc, diag::err_opencl_function_pointer) << /*pointer*/ 0; |
| 2181 | return QualType(); |
| 2182 | } |
| 2183 | |
| 2184 | if (getLangOpts().HLSL && Loc.isValid()) { |
| 2185 | Diag(Loc, diag::err_hlsl_pointers_unsupported) << 0; |
| 2186 | return QualType(); |
| 2187 | } |
| 2188 | |
| 2189 | if (checkQualifiedFunction(*this, T, Loc, QFK_Pointer)) |
| 2190 | return QualType(); |
| 2191 | |
| 2192 | assert(!T->isObjCObjectType() && "Should build ObjCObjectPointerType")(static_cast <bool> (!T->isObjCObjectType() && "Should build ObjCObjectPointerType") ? void (0) : __assert_fail ("!T->isObjCObjectType() && \"Should build ObjCObjectPointerType\"" , "clang/lib/Sema/SemaType.cpp", 2192, __extension__ __PRETTY_FUNCTION__ )); |
| 2193 | |
| 2194 | // In ARC, it is forbidden to build pointers to unqualified pointers. |
| 2195 | if (getLangOpts().ObjCAutoRefCount) |
| 2196 | T = inferARCLifetimeForPointee(*this, T, Loc, /*reference*/ false); |
| 2197 | |
| 2198 | if (getLangOpts().OpenCL) |
| 2199 | T = deduceOpenCLPointeeAddrSpace(*this, T); |
| 2200 | |
| 2201 | // In WebAssembly, pointers to reference types are illegal. |
| 2202 | if (getASTContext().getTargetInfo().getTriple().isWasm() && |
| 2203 | T->isWebAssemblyReferenceType()) { |
| 2204 | Diag(Loc, diag::err_wasm_reference_pr) << 0; |
| 2205 | return QualType(); |
| 2206 | } |
| 2207 | |
| 2208 | // Build the pointer type. |
| 2209 | return Context.getPointerType(T); |
| 2210 | } |
| 2211 | |
| 2212 | /// Build a reference type. |
| 2213 | /// |
| 2214 | /// \param T The type to which we'll be building a reference. |
| 2215 | /// |
| 2216 | /// \param Loc The location of the entity whose type involves this |
| 2217 | /// reference type or, if there is no such entity, the location of the |
| 2218 | /// type that will have reference type. |
| 2219 | /// |
| 2220 | /// \param Entity The name of the entity that involves the reference |
| 2221 | /// type, if known. |
| 2222 | /// |
| 2223 | /// \returns A suitable reference type, if there are no |
| 2224 | /// errors. Otherwise, returns a NULL type. |
| 2225 | QualType Sema::BuildReferenceType(QualType T, bool SpelledAsLValue, |
| 2226 | SourceLocation Loc, |
| 2227 | DeclarationName Entity) { |
| 2228 | assert(Context.getCanonicalType(T) != Context.OverloadTy &&(static_cast <bool> (Context.getCanonicalType(T) != Context .OverloadTy && "Unresolved overloaded function type") ? void (0) : __assert_fail ("Context.getCanonicalType(T) != Context.OverloadTy && \"Unresolved overloaded function type\"" , "clang/lib/Sema/SemaType.cpp", 2229, __extension__ __PRETTY_FUNCTION__ )) |
| 2229 | "Unresolved overloaded function type")(static_cast <bool> (Context.getCanonicalType(T) != Context .OverloadTy && "Unresolved overloaded function type") ? void (0) : __assert_fail ("Context.getCanonicalType(T) != Context.OverloadTy && \"Unresolved overloaded function type\"" , "clang/lib/Sema/SemaType.cpp", 2229, __extension__ __PRETTY_FUNCTION__ )); |
| 2230 | |
| 2231 | // C++0x [dcl.ref]p6: |
| 2232 | // If a typedef (7.1.3), a type template-parameter (14.3.1), or a |
| 2233 | // decltype-specifier (7.1.6.2) denotes a type TR that is a reference to a |
| 2234 | // type T, an attempt to create the type "lvalue reference to cv TR" creates |
| 2235 | // the type "lvalue reference to T", while an attempt to create the type |
| 2236 | // "rvalue reference to cv TR" creates the type TR. |
| 2237 | bool LValueRef = SpelledAsLValue || T->getAs<LValueReferenceType>(); |
| 2238 | |
| 2239 | // C++ [dcl.ref]p4: There shall be no references to references. |
| 2240 | // |
| 2241 | // According to C++ DR 106, references to references are only |
| 2242 | // diagnosed when they are written directly (e.g., "int & &"), |
| 2243 | // but not when they happen via a typedef: |
| 2244 | // |
| 2245 | // typedef int& intref; |
| 2246 | // typedef intref& intref2; |
| 2247 | // |
| 2248 | // Parser::ParseDeclaratorInternal diagnoses the case where |
| 2249 | // references are written directly; here, we handle the |
| 2250 | // collapsing of references-to-references as described in C++0x. |
| 2251 | // DR 106 and 540 introduce reference-collapsing into C++98/03. |
| 2252 | |
| 2253 | // C++ [dcl.ref]p1: |
| 2254 | // A declarator that specifies the type "reference to cv void" |
| 2255 | // is ill-formed. |
| 2256 | if (T->isVoidType()) { |
| 2257 | Diag(Loc, diag::err_reference_to_void); |
| 2258 | return QualType(); |
| 2259 | } |
| 2260 | |
| 2261 | if (getLangOpts().HLSL && Loc.isValid()) { |
| 2262 | Diag(Loc, diag::err_hlsl_pointers_unsupported) << 1; |
| 2263 | return QualType(); |
| 2264 | } |
| 2265 | |
| 2266 | if (checkQualifiedFunction(*this, T, Loc, QFK_Reference)) |
| 2267 | return QualType(); |
| 2268 | |
| 2269 | if (T->isFunctionType() && getLangOpts().OpenCL && |
| 2270 | !getOpenCLOptions().isAvailableOption("__cl_clang_function_pointers", |
| 2271 | getLangOpts())) { |
| 2272 | Diag(Loc, diag::err_opencl_function_pointer) << /*reference*/ 1; |
| 2273 | return QualType(); |
| 2274 | } |
| 2275 | |
| 2276 | // In ARC, it is forbidden to build references to unqualified pointers. |
| 2277 | if (getLangOpts().ObjCAutoRefCount) |
| 2278 | T = inferARCLifetimeForPointee(*this, T, Loc, /*reference*/ true); |
| 2279 | |
| 2280 | if (getLangOpts().OpenCL) |
| 2281 | T = deduceOpenCLPointeeAddrSpace(*this, T); |
| 2282 | |
| 2283 | // In WebAssembly, references to reference types are illegal. |
| 2284 | if (getASTContext().getTargetInfo().getTriple().isWasm() && |
| 2285 | T->isWebAssemblyReferenceType()) { |
| 2286 | Diag(Loc, diag::err_wasm_reference_pr) << 1; |
| 2287 | return QualType(); |
| 2288 | } |
| 2289 | |
| 2290 | // Handle restrict on references. |
| 2291 | if (LValueRef) |
| 2292 | return Context.getLValueReferenceType(T, SpelledAsLValue); |
| 2293 | return Context.getRValueReferenceType(T); |
| 2294 | } |
| 2295 | |
| 2296 | /// Build a Read-only Pipe type. |
| 2297 | /// |
| 2298 | /// \param T The type to which we'll be building a Pipe. |
| 2299 | /// |
| 2300 | /// \param Loc We do not use it for now. |
| 2301 | /// |
| 2302 | /// \returns A suitable pipe type, if there are no errors. Otherwise, returns a |
| 2303 | /// NULL type. |
| 2304 | QualType Sema::BuildReadPipeType(QualType T, SourceLocation Loc) { |
| 2305 | return Context.getReadPipeType(T); |
| 2306 | } |
| 2307 | |
| 2308 | /// Build a Write-only Pipe type. |
| 2309 | /// |
| 2310 | /// \param T The type to which we'll be building a Pipe. |
| 2311 | /// |
| 2312 | /// \param Loc We do not use it for now. |
| 2313 | /// |
| 2314 | /// \returns A suitable pipe type, if there are no errors. Otherwise, returns a |
| 2315 | /// NULL type. |
| 2316 | QualType Sema::BuildWritePipeType(QualType T, SourceLocation Loc) { |
| 2317 | return Context.getWritePipeType(T); |
| 2318 | } |
| 2319 | |
| 2320 | /// Build a bit-precise integer type. |
| 2321 | /// |
| 2322 | /// \param IsUnsigned Boolean representing the signedness of the type. |
| 2323 | /// |
| 2324 | /// \param BitWidth Size of this int type in bits, or an expression representing |
| 2325 | /// that. |
| 2326 | /// |
| 2327 | /// \param Loc Location of the keyword. |
| 2328 | QualType Sema::BuildBitIntType(bool IsUnsigned, Expr *BitWidth, |
| 2329 | SourceLocation Loc) { |
| 2330 | if (BitWidth->isInstantiationDependent()) |
| 2331 | return Context.getDependentBitIntType(IsUnsigned, BitWidth); |
| 2332 | |
| 2333 | llvm::APSInt Bits(32); |
| 2334 | ExprResult ICE = |
| 2335 | VerifyIntegerConstantExpression(BitWidth, &Bits, /*FIXME*/ AllowFold); |
| 2336 | |
| 2337 | if (ICE.isInvalid()) |
| 2338 | return QualType(); |
| 2339 | |
| 2340 | size_t NumBits = Bits.getZExtValue(); |
| 2341 | if (!IsUnsigned && NumBits < 2) { |
| 2342 | Diag(Loc, diag::err_bit_int_bad_size) << 0; |
| 2343 | return QualType(); |
| 2344 | } |
| 2345 | |
| 2346 | if (IsUnsigned && NumBits < 1) { |
| 2347 | Diag(Loc, diag::err_bit_int_bad_size) << 1; |
| 2348 | return QualType(); |
| 2349 | } |
| 2350 | |
| 2351 | const TargetInfo &TI = getASTContext().getTargetInfo(); |
| 2352 | if (NumBits > TI.getMaxBitIntWidth()) { |
| 2353 | Diag(Loc, diag::err_bit_int_max_size) |
| 2354 | << IsUnsigned << static_cast<uint64_t>(TI.getMaxBitIntWidth()); |
| 2355 | return QualType(); |
| 2356 | } |
| 2357 | |
| 2358 | return Context.getBitIntType(IsUnsigned, NumBits); |
| 2359 | } |
| 2360 | |
| 2361 | /// Check whether the specified array bound can be evaluated using the relevant |
| 2362 | /// language rules. If so, returns the possibly-converted expression and sets |
| 2363 | /// SizeVal to the size. If not, but the expression might be a VLA bound, |
| 2364 | /// returns ExprResult(). Otherwise, produces a diagnostic and returns |
| 2365 | /// ExprError(). |
| 2366 | static ExprResult checkArraySize(Sema &S, Expr *&ArraySize, |
| 2367 | llvm::APSInt &SizeVal, unsigned VLADiag, |
| 2368 | bool VLAIsError) { |
| 2369 | if (S.getLangOpts().CPlusPlus14 && |
| 2370 | (VLAIsError || |
| 2371 | !ArraySize->getType()->isIntegralOrUnscopedEnumerationType())) { |
| 2372 | // C++14 [dcl.array]p1: |
| 2373 | // The constant-expression shall be a converted constant expression of |
| 2374 | // type std::size_t. |
| 2375 | // |
| 2376 | // Don't apply this rule if we might be forming a VLA: in that case, we |
| 2377 | // allow non-constant expressions and constant-folding. We only need to use |
| 2378 | // the converted constant expression rules (to properly convert the source) |
| 2379 | // when the source expression is of class type. |
| 2380 | return S.CheckConvertedConstantExpression( |
| 2381 | ArraySize, S.Context.getSizeType(), SizeVal, Sema::CCEK_ArrayBound); |
| 2382 | } |
| 2383 | |
| 2384 | // If the size is an ICE, it certainly isn't a VLA. If we're in a GNU mode |
| 2385 | // (like gnu99, but not c99) accept any evaluatable value as an extension. |
| 2386 | class VLADiagnoser : public Sema::VerifyICEDiagnoser { |
| 2387 | public: |
| 2388 | unsigned VLADiag; |
| 2389 | bool VLAIsError; |
| 2390 | bool IsVLA = false; |
| 2391 | |
| 2392 | VLADiagnoser(unsigned VLADiag, bool VLAIsError) |
| 2393 | : VLADiag(VLADiag), VLAIsError(VLAIsError) {} |
| 2394 | |
| 2395 | Sema::SemaDiagnosticBuilder diagnoseNotICEType(Sema &S, SourceLocation Loc, |
| 2396 | QualType T) override { |
| 2397 | return S.Diag(Loc, diag::err_array_size_non_int) << T; |
| 2398 | } |
| 2399 | |
| 2400 | Sema::SemaDiagnosticBuilder diagnoseNotICE(Sema &S, |
| 2401 | SourceLocation Loc) override { |
| 2402 | IsVLA = !VLAIsError; |
| 2403 | return S.Diag(Loc, VLADiag); |
| 2404 | } |
| 2405 | |
| 2406 | Sema::SemaDiagnosticBuilder diagnoseFold(Sema &S, |
| 2407 | SourceLocation Loc) override { |
| 2408 | return S.Diag(Loc, diag::ext_vla_folded_to_constant); |
| 2409 | } |
| 2410 | } Diagnoser(VLADiag, VLAIsError); |
| 2411 | |
| 2412 | ExprResult R = |
| 2413 | S.VerifyIntegerConstantExpression(ArraySize, &SizeVal, Diagnoser); |
| 2414 | if (Diagnoser.IsVLA) |
| 2415 | return ExprResult(); |
| 2416 | return R; |
| 2417 | } |
| 2418 | |
| 2419 | bool Sema::checkArrayElementAlignment(QualType EltTy, SourceLocation Loc) { |
| 2420 | EltTy = Context.getBaseElementType(EltTy); |
| 2421 | if (EltTy->isIncompleteType() || EltTy->isDependentType() || |
| 2422 | EltTy->isUndeducedType()) |
| 2423 | return true; |
| 2424 | |
| 2425 | CharUnits Size = Context.getTypeSizeInChars(EltTy); |
| 2426 | CharUnits Alignment = Context.getTypeAlignInChars(EltTy); |
| 2427 | |
| 2428 | if (Size.isMultipleOf(Alignment)) |
| 2429 | return true; |
| 2430 | |
| 2431 | Diag(Loc, diag::err_array_element_alignment) |
| 2432 | << EltTy << Size.getQuantity() << Alignment.getQuantity(); |
| 2433 | return false; |
| 2434 | } |
| 2435 | |
| 2436 | /// Build an array type. |
| 2437 | /// |
| 2438 | /// \param T The type of each element in the array. |
| 2439 | /// |
| 2440 | /// \param ASM C99 array size modifier (e.g., '*', 'static'). |
| 2441 | /// |
| 2442 | /// \param ArraySize Expression describing the size of the array. |
| 2443 | /// |
| 2444 | /// \param Brackets The range from the opening '[' to the closing ']'. |
| 2445 | /// |
| 2446 | /// \param Entity The name of the entity that involves the array |
| 2447 | /// type, if known. |
| 2448 | /// |
| 2449 | /// \returns A suitable array type, if there are no errors. Otherwise, |
| 2450 | /// returns a NULL type. |
| 2451 | QualType Sema::BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, |
| 2452 | Expr *ArraySize, unsigned Quals, |
| 2453 | SourceRange Brackets, DeclarationName Entity) { |
| 2454 | |
| 2455 | SourceLocation Loc = Brackets.getBegin(); |
| 2456 | if (getLangOpts().CPlusPlus) { |
| 2457 | // C++ [dcl.array]p1: |
| 2458 | // T is called the array element type; this type shall not be a reference |
| 2459 | // type, the (possibly cv-qualified) type void, a function type or an |
| 2460 | // abstract class type. |
| 2461 | // |
| 2462 | // C++ [dcl.array]p3: |
| 2463 | // When several "array of" specifications are adjacent, [...] only the |
| 2464 | // first of the constant expressions that specify the bounds of the arrays |
| 2465 | // may be omitted. |
| 2466 | // |
| 2467 | // Note: function types are handled in the common path with C. |
| 2468 | if (T->isReferenceType()) { |
| 2469 | Diag(Loc, diag::err_illegal_decl_array_of_references) |
| 2470 | << getPrintableNameForEntity(Entity) << T; |
| 2471 | return QualType(); |
| 2472 | } |
| 2473 | |
| 2474 | if (T->isVoidType() || T->isIncompleteArrayType()) { |
| 2475 | Diag(Loc, diag::err_array_incomplete_or_sizeless_type) << 0 << T; |
| 2476 | return QualType(); |
| 2477 | } |
| 2478 | |
| 2479 | if (RequireNonAbstractType(Brackets.getBegin(), T, |
| 2480 | diag::err_array_of_abstract_type)) |
| 2481 | return QualType(); |
| 2482 | |
| 2483 | // Mentioning a member pointer type for an array type causes us to lock in |
| 2484 | // an inheritance model, even if it's inside an unused typedef. |
| 2485 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) |
| 2486 | if (const MemberPointerType *MPTy = T->getAs<MemberPointerType>()) |
| 2487 | if (!MPTy->getClass()->isDependentType()) |
| 2488 | (void)isCompleteType(Loc, T); |
| 2489 | |
| 2490 | } else { |
| 2491 | // C99 6.7.5.2p1: If the element type is an incomplete or function type, |
| 2492 | // reject it (e.g. void ary[7], struct foo ary[7], void ary[7]()) |
| 2493 | if (RequireCompleteSizedType(Loc, T, |
| 2494 | diag::err_array_incomplete_or_sizeless_type)) |
| 2495 | return QualType(); |
| 2496 | } |
| 2497 | |
| 2498 | if (T->isSizelessType()) { |
| 2499 | Diag(Loc, diag::err_array_incomplete_or_sizeless_type) << 1 << T; |
| 2500 | return QualType(); |
| 2501 | } |
| 2502 | |
| 2503 | if (T->isFunctionType()) { |
| 2504 | Diag(Loc, diag::err_illegal_decl_array_of_functions) |
| 2505 | << getPrintableNameForEntity(Entity) << T; |
| 2506 | return QualType(); |
| 2507 | } |
| 2508 | |
| 2509 | if (const RecordType *EltTy = T->getAs<RecordType>()) { |
| 2510 | // If the element type is a struct or union that contains a variadic |
| 2511 | // array, accept it as a GNU extension: C99 6.7.2.1p2. |
| 2512 | if (EltTy->getDecl()->hasFlexibleArrayMember()) |
| 2513 | Diag(Loc, diag::ext_flexible_array_in_array) << T; |
| 2514 | } else if (T->isObjCObjectType()) { |
| 2515 | Diag(Loc, diag::err_objc_array_of_interfaces) << T; |
| 2516 | return QualType(); |
| 2517 | } |
| 2518 | |
| 2519 | if (!checkArrayElementAlignment(T, Loc)) |
| 2520 | return QualType(); |
| 2521 | |
| 2522 | // Do placeholder conversions on the array size expression. |
| 2523 | if (ArraySize && ArraySize->hasPlaceholderType()) { |
| 2524 | ExprResult Result = CheckPlaceholderExpr(ArraySize); |
| 2525 | if (Result.isInvalid()) return QualType(); |
| 2526 | ArraySize = Result.get(); |
| 2527 | } |
| 2528 | |
| 2529 | // Do lvalue-to-rvalue conversions on the array size expression. |
| 2530 | if (ArraySize && !ArraySize->isPRValue()) { |
| 2531 | ExprResult Result = DefaultLvalueConversion(ArraySize); |
| 2532 | if (Result.isInvalid()) |
| 2533 | return QualType(); |
| 2534 | |
| 2535 | ArraySize = Result.get(); |
| 2536 | } |
| 2537 | |
| 2538 | // C99 6.7.5.2p1: The size expression shall have integer type. |
| 2539 | // C++11 allows contextual conversions to such types. |
| 2540 | if (!getLangOpts().CPlusPlus11 && |
| 2541 | ArraySize && !ArraySize->isTypeDependent() && |
| 2542 | !ArraySize->getType()->isIntegralOrUnscopedEnumerationType()) { |
| 2543 | Diag(ArraySize->getBeginLoc(), diag::err_array_size_non_int) |
| 2544 | << ArraySize->getType() << ArraySize->getSourceRange(); |
| 2545 | return QualType(); |
| 2546 | } |
| 2547 | |
| 2548 | // VLAs always produce at least a -Wvla diagnostic, sometimes an error. |
| 2549 | unsigned VLADiag; |
| 2550 | bool VLAIsError; |
| 2551 | if (getLangOpts().OpenCL) { |
| 2552 | // OpenCL v1.2 s6.9.d: variable length arrays are not supported. |
| 2553 | VLADiag = diag::err_opencl_vla; |
| 2554 | VLAIsError = true; |
| 2555 | } else if (getLangOpts().C99) { |
| 2556 | VLADiag = diag::warn_vla_used; |
| 2557 | VLAIsError = false; |
| 2558 | } else if (isSFINAEContext()) { |
| 2559 | VLADiag = diag::err_vla_in_sfinae; |
| 2560 | VLAIsError = true; |
| 2561 | } else if (getLangOpts().OpenMP && isInOpenMPTaskUntiedContext()) { |
| 2562 | VLADiag = diag::err_openmp_vla_in_task_untied; |
| 2563 | VLAIsError = true; |
| 2564 | } else { |
| 2565 | VLADiag = diag::ext_vla; |
| 2566 | VLAIsError = false; |
| 2567 | } |
| 2568 | |
| 2569 | llvm::APSInt ConstVal(Context.getTypeSize(Context.getSizeType())); |
| 2570 | if (!ArraySize) { |
| 2571 | if (ASM == ArrayType::Star) { |
| 2572 | Diag(Loc, VLADiag); |
| 2573 | if (VLAIsError) |
| 2574 | return QualType(); |
| 2575 | |
| 2576 | T = Context.getVariableArrayType(T, nullptr, ASM, Quals, Brackets); |
| 2577 | } else { |
| 2578 | T = Context.getIncompleteArrayType(T, ASM, Quals); |
| 2579 | } |
| 2580 | } else if (ArraySize->isTypeDependent() || ArraySize->isValueDependent()) { |
| 2581 | T = Context.getDependentSizedArrayType(T, ArraySize, ASM, Quals, Brackets); |
| 2582 | } else { |
| 2583 | ExprResult R = |
| 2584 | checkArraySize(*this, ArraySize, ConstVal, VLADiag, VLAIsError); |
| 2585 | if (R.isInvalid()) |
| 2586 | return QualType(); |
| 2587 | |
| 2588 | if (!R.isUsable()) { |
| 2589 | // C99: an array with a non-ICE size is a VLA. We accept any expression |
| 2590 | // that we can fold to a non-zero positive value as a non-VLA as an |
| 2591 | // extension. |
| 2592 | T = Context.getVariableArrayType(T, ArraySize, ASM, Quals, Brackets); |
| 2593 | } else if (!T->isDependentType() && !T->isIncompleteType() && |
| 2594 | !T->isConstantSizeType()) { |
| 2595 | // C99: an array with an element type that has a non-constant-size is a |
| 2596 | // VLA. |
| 2597 | // FIXME: Add a note to explain why this isn't a VLA. |
| 2598 | Diag(Loc, VLADiag); |
| 2599 | if (VLAIsError) |
| 2600 | return QualType(); |
| 2601 | T = Context.getVariableArrayType(T, ArraySize, ASM, Quals, Brackets); |
| 2602 | } else { |
| 2603 | // C99 6.7.5.2p1: If the expression is a constant expression, it shall |
| 2604 | // have a value greater than zero. |
| 2605 | // In C++, this follows from narrowing conversions being disallowed. |
| 2606 | if (ConstVal.isSigned() && ConstVal.isNegative()) { |
| 2607 | if (Entity) |
| 2608 | Diag(ArraySize->getBeginLoc(), diag::err_decl_negative_array_size) |
| 2609 | << getPrintableNameForEntity(Entity) |
| 2610 | << ArraySize->getSourceRange(); |
| 2611 | else |
| 2612 | Diag(ArraySize->getBeginLoc(), |
| 2613 | diag::err_typecheck_negative_array_size) |
| 2614 | << ArraySize->getSourceRange(); |
| 2615 | return QualType(); |
| 2616 | } |
| 2617 | if (ConstVal == 0) { |
| 2618 | // GCC accepts zero sized static arrays. We allow them when |
| 2619 | // we're not in a SFINAE context. |
| 2620 | Diag(ArraySize->getBeginLoc(), |
| 2621 | isSFINAEContext() ? diag::err_typecheck_zero_array_size |
| 2622 | : diag::ext_typecheck_zero_array_size) |
| 2623 | << 0 << ArraySize->getSourceRange(); |
| 2624 | } |
| 2625 | |
| 2626 | // Is the array too large? |
| 2627 | unsigned ActiveSizeBits = |
| 2628 | (!T->isDependentType() && !T->isVariablyModifiedType() && |
| 2629 | !T->isIncompleteType() && !T->isUndeducedType()) |
| 2630 | ? ConstantArrayType::getNumAddressingBits(Context, T, ConstVal) |
| 2631 | : ConstVal.getActiveBits(); |
| 2632 | if (ActiveSizeBits > ConstantArrayType::getMaxSizeBits(Context)) { |
| 2633 | Diag(ArraySize->getBeginLoc(), diag::err_array_too_large) |
| 2634 | << toString(ConstVal, 10) << ArraySize->getSourceRange(); |
| 2635 | return QualType(); |
| 2636 | } |
| 2637 | |
| 2638 | T = Context.getConstantArrayType(T, ConstVal, ArraySize, ASM, Quals); |
| 2639 | } |
| 2640 | } |
| 2641 | |
| 2642 | if (T->isVariableArrayType() && !Context.getTargetInfo().isVLASupported()) { |
| 2643 | // CUDA device code and some other targets don't support VLAs. |
| 2644 | bool IsCUDADevice = (getLangOpts().CUDA && getLangOpts().CUDAIsDevice); |
| 2645 | targetDiag(Loc, |
| 2646 | IsCUDADevice ? diag::err_cuda_vla : diag::err_vla_unsupported) |
| 2647 | << (IsCUDADevice ? CurrentCUDATarget() : 0); |
| 2648 | } |
| 2649 | |
| 2650 | // If this is not C99, diagnose array size modifiers on non-VLAs. |
| 2651 | if (!getLangOpts().C99 && !T->isVariableArrayType() && |
| 2652 | (ASM != ArrayType::Normal || Quals != 0)) { |
| 2653 | Diag(Loc, getLangOpts().CPlusPlus ? diag::err_c99_array_usage_cxx |
| 2654 | : diag::ext_c99_array_usage) |
| 2655 | << ASM; |
| 2656 | } |
| 2657 | |
| 2658 | // OpenCL v2.0 s6.12.5 - Arrays of blocks are not supported. |
| 2659 | // OpenCL v2.0 s6.16.13.1 - Arrays of pipe type are not supported. |
| 2660 | // OpenCL v2.0 s6.9.b - Arrays of image/sampler type are not supported. |
| 2661 | if (getLangOpts().OpenCL) { |
| 2662 | const QualType ArrType = Context.getBaseElementType(T); |
| 2663 | if (ArrType->isBlockPointerType() || ArrType->isPipeType() || |
| 2664 | ArrType->isSamplerT() || ArrType->isImageType()) { |
| 2665 | Diag(Loc, diag::err_opencl_invalid_type_array) << ArrType; |
| 2666 | return QualType(); |
| 2667 | } |
| 2668 | } |
| 2669 | |
| 2670 | return T; |
| 2671 | } |
| 2672 | |
| 2673 | QualType Sema::BuildVectorType(QualType CurType, Expr *SizeExpr, |
| 2674 | SourceLocation AttrLoc) { |
| 2675 | // The base type must be integer (not Boolean or enumeration) or float, and |
| 2676 | // can't already be a vector. |
| 2677 | if ((!CurType->isDependentType() && |
| 2678 | (!CurType->isBuiltinType() || CurType->isBooleanType() || |
| 2679 | (!CurType->isIntegerType() && !CurType->isRealFloatingType())) && |
| 2680 | !CurType->isBitIntType()) || |
| 2681 | CurType->isArrayType()) { |
| 2682 | Diag(AttrLoc, diag::err_attribute_invalid_vector_type) << CurType; |
| 2683 | return QualType(); |
| 2684 | } |
| 2685 | // Only support _BitInt elements with byte-sized power of 2 NumBits. |
| 2686 | if (CurType->isBitIntType()) { |
| 2687 | unsigned NumBits = CurType->getAs<BitIntType>()->getNumBits(); |
| 2688 | if (!llvm::isPowerOf2_32(NumBits) || NumBits < 8) { |
| 2689 | Diag(AttrLoc, diag::err_attribute_invalid_bitint_vector_type) |
| 2690 | << (NumBits < 8); |
| 2691 | return QualType(); |
| 2692 | } |
| 2693 | } |
| 2694 | |
| 2695 | if (SizeExpr->isTypeDependent() || SizeExpr->isValueDependent()) |
| 2696 | return Context.getDependentVectorType(CurType, SizeExpr, AttrLoc, |
| 2697 | VectorType::GenericVector); |
| 2698 | |
| 2699 | std::optional<llvm::APSInt> VecSize = |
| 2700 | SizeExpr->getIntegerConstantExpr(Context); |
| 2701 | if (!VecSize) { |
| 2702 | Diag(AttrLoc, diag::err_attribute_argument_type) |
| 2703 | << "vector_size" << AANT_ArgumentIntegerConstant |
| 2704 | << SizeExpr->getSourceRange(); |
| 2705 | return QualType(); |
| 2706 | } |
| 2707 | |
| 2708 | if (CurType->isDependentType()) |
| 2709 | return Context.getDependentVectorType(CurType, SizeExpr, AttrLoc, |
| 2710 | VectorType::GenericVector); |
| 2711 | |
| 2712 | // vecSize is specified in bytes - convert to bits. |
| 2713 | if (!VecSize->isIntN(61)) { |
| 2714 | // Bit size will overflow uint64. |
| 2715 | Diag(AttrLoc, diag::err_attribute_size_too_large) |
| 2716 | << SizeExpr->getSourceRange() << "vector"; |
| 2717 | return QualType(); |
| 2718 | } |
| 2719 | uint64_t VectorSizeBits = VecSize->getZExtValue() * 8; |
| 2720 | unsigned TypeSize = static_cast<unsigned>(Context.getTypeSize(CurType)); |
| 2721 | |
| 2722 | if (VectorSizeBits == 0) { |
| 2723 | Diag(AttrLoc, diag::err_attribute_zero_size) |
| 2724 | << SizeExpr->getSourceRange() << "vector"; |
| 2725 | return QualType(); |
| 2726 | } |
| 2727 | |
| 2728 | if (!TypeSize || VectorSizeBits % TypeSize) { |
| 2729 | Diag(AttrLoc, diag::err_attribute_invalid_size) |
| 2730 | << SizeExpr->getSourceRange(); |
| 2731 | return QualType(); |
| 2732 | } |
| 2733 | |
| 2734 | if (VectorSizeBits / TypeSize > std::numeric_limits<uint32_t>::max()) { |
| 2735 | Diag(AttrLoc, diag::err_attribute_size_too_large) |
| 2736 | << SizeExpr->getSourceRange() << "vector"; |
| 2737 | return QualType(); |
| 2738 | } |
| 2739 | |
| 2740 | return Context.getVectorType(CurType, VectorSizeBits / TypeSize, |
| 2741 | VectorType::GenericVector); |
| 2742 | } |
| 2743 | |
| 2744 | /// Build an ext-vector type. |
| 2745 | /// |
| 2746 | /// Run the required checks for the extended vector type. |
| 2747 | QualType Sema::BuildExtVectorType(QualType T, Expr *ArraySize, |
| 2748 | SourceLocation AttrLoc) { |
| 2749 | // Unlike gcc's vector_size attribute, we do not allow vectors to be defined |
| 2750 | // in conjunction with complex types (pointers, arrays, functions, etc.). |
| 2751 | // |
| 2752 | // Additionally, OpenCL prohibits vectors of booleans (they're considered a |
| 2753 | // reserved data type under OpenCL v2.0 s6.1.4), we don't support selects |
| 2754 | // on bitvectors, and we have no well-defined ABI for bitvectors, so vectors |
| 2755 | // of bool aren't allowed. |
| 2756 | // |
| 2757 | // We explictly allow bool elements in ext_vector_type for C/C++. |
| 2758 | bool IsNoBoolVecLang = getLangOpts().OpenCL || getLangOpts().OpenCLCPlusPlus; |
| 2759 | if ((!T->isDependentType() && !T->isIntegerType() && |
| 2760 | !T->isRealFloatingType()) || |
| 2761 | (IsNoBoolVecLang && T->isBooleanType())) { |
| 2762 | Diag(AttrLoc, diag::err_attribute_invalid_vector_type) << T; |
| 2763 | return QualType(); |
| 2764 | } |
| 2765 | |
| 2766 | // Only support _BitInt elements with byte-sized power of 2 NumBits. |
| 2767 | if (T->isBitIntType()) { |
| 2768 | unsigned NumBits = T->getAs<BitIntType>()->getNumBits(); |
| 2769 | if (!llvm::isPowerOf2_32(NumBits) || NumBits < 8) { |
| 2770 | Diag(AttrLoc, diag::err_attribute_invalid_bitint_vector_type) |
| 2771 | << (NumBits < 8); |
| 2772 | return QualType(); |
| 2773 | } |
| 2774 | } |
| 2775 | |
| 2776 | if (!ArraySize->isTypeDependent() && !ArraySize->isValueDependent()) { |
| 2777 | std::optional<llvm::APSInt> vecSize = |
| 2778 | ArraySize->getIntegerConstantExpr(Context); |
| 2779 | if (!vecSize) { |
| 2780 | Diag(AttrLoc, diag::err_attribute_argument_type) |
| 2781 | << "ext_vector_type" << AANT_ArgumentIntegerConstant |
| 2782 | << ArraySize->getSourceRange(); |
| 2783 | return QualType(); |
| 2784 | } |
| 2785 | |
| 2786 | if (!vecSize->isIntN(32)) { |
| 2787 | Diag(AttrLoc, diag::err_attribute_size_too_large) |
| 2788 | << ArraySize->getSourceRange() << "vector"; |
| 2789 | return QualType(); |
| 2790 | } |
| 2791 | // Unlike gcc's vector_size attribute, the size is specified as the |
| 2792 | // number of elements, not the number of bytes. |
| 2793 | unsigned vectorSize = static_cast<unsigned>(vecSize->getZExtValue()); |
| 2794 | |
| 2795 | if (vectorSize == 0) { |
| 2796 | Diag(AttrLoc, diag::err_attribute_zero_size) |
| 2797 | << ArraySize->getSourceRange() << "vector"; |
| 2798 | return QualType(); |
| 2799 | } |
| 2800 | |
| 2801 | return Context.getExtVectorType(T, vectorSize); |
| 2802 | } |
| 2803 | |
| 2804 | return Context.getDependentSizedExtVectorType(T, ArraySize, AttrLoc); |
| 2805 | } |
| 2806 | |
| 2807 | QualType Sema::BuildMatrixType(QualType ElementTy, Expr *NumRows, Expr *NumCols, |
| 2808 | SourceLocation AttrLoc) { |
| 2809 | assert(Context.getLangOpts().MatrixTypes &&(static_cast <bool> (Context.getLangOpts().MatrixTypes && "Should never build a matrix type when it is disabled") ? void (0) : __assert_fail ("Context.getLangOpts().MatrixTypes && \"Should never build a matrix type when it is disabled\"" , "clang/lib/Sema/SemaType.cpp", 2810, __extension__ __PRETTY_FUNCTION__ )) |
| 2810 | "Should never build a matrix type when it is disabled")(static_cast <bool> (Context.getLangOpts().MatrixTypes && "Should never build a matrix type when it is disabled") ? void (0) : __assert_fail ("Context.getLangOpts().MatrixTypes && \"Should never build a matrix type when it is disabled\"" , "clang/lib/Sema/SemaType.cpp", 2810, __extension__ __PRETTY_FUNCTION__ )); |
| 2811 | |
| 2812 | // Check element type, if it is not dependent. |
| 2813 | if (!ElementTy->isDependentType() && |
| 2814 | !MatrixType::isValidElementType(ElementTy)) { |
| 2815 | Diag(AttrLoc, diag::err_attribute_invalid_matrix_type) << ElementTy; |
| 2816 | return QualType(); |
| 2817 | } |
| 2818 | |
| 2819 | if (NumRows->isTypeDependent() || NumCols->isTypeDependent() || |
| 2820 | NumRows->isValueDependent() || NumCols->isValueDependent()) |
| 2821 | return Context.getDependentSizedMatrixType(ElementTy, NumRows, NumCols, |
| 2822 | AttrLoc); |
| 2823 | |
| 2824 | std::optional<llvm::APSInt> ValueRows = |
| 2825 | NumRows->getIntegerConstantExpr(Context); |
| 2826 | std::optional<llvm::APSInt> ValueColumns = |
| 2827 | NumCols->getIntegerConstantExpr(Context); |
| 2828 | |
| 2829 | auto const RowRange = NumRows->getSourceRange(); |
| 2830 | auto const ColRange = NumCols->getSourceRange(); |
| 2831 | |
| 2832 | // Both are row and column expressions are invalid. |
| 2833 | if (!ValueRows && !ValueColumns) { |
| 2834 | Diag(AttrLoc, diag::err_attribute_argument_type) |
| 2835 | << "matrix_type" << AANT_ArgumentIntegerConstant << RowRange |
| 2836 | << ColRange; |
| 2837 | return QualType(); |
| 2838 | } |
| 2839 | |
| 2840 | // Only the row expression is invalid. |
| 2841 | if (!ValueRows) { |
| 2842 | Diag(AttrLoc, diag::err_attribute_argument_type) |
| 2843 | << "matrix_type" << AANT_ArgumentIntegerConstant << RowRange; |
| 2844 | return QualType(); |
| 2845 | } |
| 2846 | |
| 2847 | // Only the column expression is invalid. |
| 2848 | if (!ValueColumns) { |
| 2849 | Diag(AttrLoc, diag::err_attribute_argument_type) |
| 2850 | << "matrix_type" << AANT_ArgumentIntegerConstant << ColRange; |
| 2851 | return QualType(); |
| 2852 | } |
| 2853 | |
| 2854 | // Check the matrix dimensions. |
| 2855 | unsigned MatrixRows = static_cast<unsigned>(ValueRows->getZExtValue()); |
| 2856 | unsigned MatrixColumns = static_cast<unsigned>(ValueColumns->getZExtValue()); |
| 2857 | if (MatrixRows == 0 && MatrixColumns == 0) { |
| 2858 | Diag(AttrLoc, diag::err_attribute_zero_size) |
| 2859 | << "matrix" << RowRange << ColRange; |
| 2860 | return QualType(); |
| 2861 | } |
| 2862 | if (MatrixRows == 0) { |
| 2863 | Diag(AttrLoc, diag::err_attribute_zero_size) << "matrix" << RowRange; |
| 2864 | return QualType(); |
| 2865 | } |
| 2866 | if (MatrixColumns == 0) { |
| 2867 | Diag(AttrLoc, diag::err_attribute_zero_size) << "matrix" << ColRange; |
| 2868 | return QualType(); |
| 2869 | } |
| 2870 | if (!ConstantMatrixType::isDimensionValid(MatrixRows)) { |
| 2871 | Diag(AttrLoc, diag::err_attribute_size_too_large) |
| 2872 | << RowRange << "matrix row"; |
| 2873 | return QualType(); |
| 2874 | } |
| 2875 | if (!ConstantMatrixType::isDimensionValid(MatrixColumns)) { |
| 2876 | Diag(AttrLoc, diag::err_attribute_size_too_large) |
| 2877 | << ColRange << "matrix column"; |
| 2878 | return QualType(); |
| 2879 | } |
| 2880 | return Context.getConstantMatrixType(ElementTy, MatrixRows, MatrixColumns); |
| 2881 | } |
| 2882 | |
| 2883 | bool Sema::CheckFunctionReturnType(QualType T, SourceLocation Loc) { |
| 2884 | if (T->isArrayType() || T->isFunctionType()) { |
| 2885 | Diag(Loc, diag::err_func_returning_array_function) |
| 2886 | << T->isFunctionType() << T; |
| 2887 | return true; |
| 2888 | } |
| 2889 | |
| 2890 | // Functions cannot return half FP. |
| 2891 | if (T->isHalfType() && !getLangOpts().NativeHalfArgsAndReturns && |
| 2892 | !Context.getTargetInfo().allowHalfArgsAndReturns()) { |
| 2893 | Diag(Loc, diag::err_parameters_retval_cannot_have_fp16_type) << 1 << |
| 2894 | FixItHint::CreateInsertion(Loc, "*"); |
| 2895 | return true; |
| 2896 | } |
| 2897 | |
| 2898 | // Methods cannot return interface types. All ObjC objects are |
| 2899 | // passed by reference. |
| 2900 | if (T->isObjCObjectType()) { |
| 2901 | Diag(Loc, diag::err_object_cannot_be_passed_returned_by_value) |
| 2902 | << 0 << T << FixItHint::CreateInsertion(Loc, "*"); |
| 2903 | return true; |
| 2904 | } |
| 2905 | |
| 2906 | if (T.hasNonTrivialToPrimitiveDestructCUnion() || |
| 2907 | T.hasNonTrivialToPrimitiveCopyCUnion()) |
| 2908 | checkNonTrivialCUnion(T, Loc, NTCUC_FunctionReturn, |
| 2909 | NTCUK_Destruct|NTCUK_Copy); |
| 2910 | |
| 2911 | // C++2a [dcl.fct]p12: |
| 2912 | // A volatile-qualified return type is deprecated |
| 2913 | if (T.isVolatileQualified() && getLangOpts().CPlusPlus20) |
| 2914 | Diag(Loc, diag::warn_deprecated_volatile_return) << T; |
| 2915 | |
| 2916 | if (T.getAddressSpace() != LangAS::Default && getLangOpts().HLSL) |
| 2917 | return true; |
| 2918 | return false; |
| 2919 | } |
| 2920 | |
| 2921 | /// Check the extended parameter information. Most of the necessary |
| 2922 | /// checking should occur when applying the parameter attribute; the |
| 2923 | /// only other checks required are positional restrictions. |
| 2924 | static void checkExtParameterInfos(Sema &S, ArrayRef<QualType> paramTypes, |
| 2925 | const FunctionProtoType::ExtProtoInfo &EPI, |
| 2926 | llvm::function_ref<SourceLocation(unsigned)> getParamLoc) { |
| 2927 | assert(EPI.ExtParameterInfos && "shouldn't get here without param infos")(static_cast <bool> (EPI.ExtParameterInfos && "shouldn't get here without param infos" ) ? void (0) : __assert_fail ("EPI.ExtParameterInfos && \"shouldn't get here without param infos\"" , "clang/lib/Sema/SemaType.cpp", 2927, __extension__ __PRETTY_FUNCTION__ )); |
| 2928 | |
| 2929 | bool emittedError = false; |
| 2930 | auto actualCC = EPI.ExtInfo.getCC(); |
| 2931 | enum class RequiredCC { OnlySwift, SwiftOrSwiftAsync }; |
| 2932 | auto checkCompatible = [&](unsigned paramIndex, RequiredCC required) { |
| 2933 | bool isCompatible = |
| 2934 | (required == RequiredCC::OnlySwift) |
| 2935 | ? (actualCC == CC_Swift) |
| 2936 | : (actualCC == CC_Swift || actualCC == CC_SwiftAsync); |
| 2937 | if (isCompatible || emittedError) |
| 2938 | return; |
| 2939 | S.Diag(getParamLoc(paramIndex), diag::err_swift_param_attr_not_swiftcall) |
| 2940 | << getParameterABISpelling(EPI.ExtParameterInfos[paramIndex].getABI()) |
| 2941 | << (required == RequiredCC::OnlySwift); |
| 2942 | emittedError = true; |
| 2943 | }; |
| 2944 | for (size_t paramIndex = 0, numParams = paramTypes.size(); |
| 2945 | paramIndex != numParams; ++paramIndex) { |
| 2946 | switch (EPI.ExtParameterInfos[paramIndex].getABI()) { |
| 2947 | // Nothing interesting to check for orindary-ABI parameters. |
| 2948 | case ParameterABI::Ordinary: |
| 2949 | continue; |
| 2950 | |
| 2951 | // swift_indirect_result parameters must be a prefix of the function |
| 2952 | // arguments. |
| 2953 | case ParameterABI::SwiftIndirectResult: |
| 2954 | checkCompatible(paramIndex, RequiredCC::SwiftOrSwiftAsync); |
| 2955 | if (paramIndex != 0 && |
| 2956 | EPI.ExtParameterInfos[paramIndex - 1].getABI() |
| 2957 | != ParameterABI::SwiftIndirectResult) { |
| 2958 | S.Diag(getParamLoc(paramIndex), |
| 2959 | diag::err_swift_indirect_result_not_first); |
| 2960 | } |
| 2961 | continue; |
| 2962 | |
| 2963 | case ParameterABI::SwiftContext: |
| 2964 | checkCompatible(paramIndex, RequiredCC::SwiftOrSwiftAsync); |
| 2965 | continue; |
| 2966 | |
| 2967 | // SwiftAsyncContext is not limited to swiftasynccall functions. |
| 2968 | case ParameterABI::SwiftAsyncContext: |
| 2969 | continue; |
| 2970 | |
| 2971 | // swift_error parameters must be preceded by a swift_context parameter. |
| 2972 | case ParameterABI::SwiftErrorResult: |
| 2973 | checkCompatible(paramIndex, RequiredCC::OnlySwift); |
| 2974 | if (paramIndex == 0 || |
| 2975 | EPI.ExtParameterInfos[paramIndex - 1].getABI() != |
| 2976 | ParameterABI::SwiftContext) { |
| 2977 | S.Diag(getParamLoc(paramIndex), |
| 2978 | diag::err_swift_error_result_not_after_swift_context); |
| 2979 | } |
| 2980 | continue; |
| 2981 | } |
| 2982 | llvm_unreachable("bad ABI kind")::llvm::llvm_unreachable_internal("bad ABI kind", "clang/lib/Sema/SemaType.cpp" , 2982); |
| 2983 | } |
| 2984 | } |
| 2985 | |
| 2986 | QualType Sema::BuildFunctionType(QualType T, |
| 2987 | MutableArrayRef<QualType> ParamTypes, |
| 2988 | SourceLocation Loc, DeclarationName Entity, |
| 2989 | const FunctionProtoType::ExtProtoInfo &EPI) { |
| 2990 | bool Invalid = false; |
| 2991 | |
| 2992 | Invalid |= CheckFunctionReturnType(T, Loc); |
| 2993 | |
| 2994 | for (unsigned Idx = 0, Cnt = ParamTypes.size(); Idx < Cnt; ++Idx) { |
| 2995 | // FIXME: Loc is too inprecise here, should use proper locations for args. |
| 2996 | QualType ParamType = Context.getAdjustedParameterType(ParamTypes[Idx]); |
| 2997 | if (ParamType->isVoidType()) { |
| 2998 | Diag(Loc, diag::err_param_with_void_type); |
| 2999 | Invalid = true; |
| 3000 | } else if (ParamType->isHalfType() && !getLangOpts().NativeHalfArgsAndReturns && |
| 3001 | !Context.getTargetInfo().allowHalfArgsAndReturns()) { |
| 3002 | // Disallow half FP arguments. |
| 3003 | Diag(Loc, diag::err_parameters_retval_cannot_have_fp16_type) << 0 << |
| 3004 | FixItHint::CreateInsertion(Loc, "*"); |
| 3005 | Invalid = true; |
| 3006 | } |
| 3007 | |
| 3008 | // C++2a [dcl.fct]p4: |
| 3009 | // A parameter with volatile-qualified type is deprecated |
| 3010 | if (ParamType.isVolatileQualified() && getLangOpts().CPlusPlus20) |
| 3011 | Diag(Loc, diag::warn_deprecated_volatile_param) << ParamType; |
| 3012 | |
| 3013 | ParamTypes[Idx] = ParamType; |
| 3014 | } |
| 3015 | |
| 3016 | if (EPI.ExtParameterInfos) { |
| 3017 | checkExtParameterInfos(*this, ParamTypes, EPI, |
| 3018 | [=](unsigned i) { return Loc; }); |
| 3019 | } |
| 3020 | |
| 3021 | if (EPI.ExtInfo.getProducesResult()) { |
| 3022 | // This is just a warning, so we can't fail to build if we see it. |
| 3023 | checkNSReturnsRetainedReturnType(Loc, T); |
| 3024 | } |
| 3025 | |
| 3026 | if (Invalid) |
| 3027 | return QualType(); |
| 3028 | |
| 3029 | return Context.getFunctionType(T, ParamTypes, EPI); |
| 3030 | } |
| 3031 | |
| 3032 | /// Build a member pointer type \c T Class::*. |
| 3033 | /// |
| 3034 | /// \param T the type to which the member pointer refers. |
| 3035 | /// \param Class the class type into which the member pointer points. |
| 3036 | /// \param Loc the location where this type begins |
| 3037 | /// \param Entity the name of the entity that will have this member pointer type |
| 3038 | /// |
| 3039 | /// \returns a member pointer type, if successful, or a NULL type if there was |
| 3040 | /// an error. |
| 3041 | QualType Sema::BuildMemberPointerType(QualType T, QualType Class, |
| 3042 | SourceLocation Loc, |
| 3043 | DeclarationName Entity) { |
| 3044 | // Verify that we're not building a pointer to pointer to function with |
| 3045 | // exception specification. |
| 3046 | if (CheckDistantExceptionSpec(T)) { |
| 3047 | Diag(Loc, diag::err_distant_exception_spec); |
| 3048 | return QualType(); |
| 3049 | } |
| 3050 | |
| 3051 | // C++ 8.3.3p3: A pointer to member shall not point to ... a member |
| 3052 | // with reference type, or "cv void." |
| 3053 | if (T->isReferenceType()) { |
| 3054 | Diag(Loc, diag::err_illegal_decl_mempointer_to_reference) |
| 3055 | << getPrintableNameForEntity(Entity) << T; |
| 3056 | return QualType(); |
| 3057 | } |
| 3058 | |
| 3059 | if (T->isVoidType()) { |
| 3060 | Diag(Loc, diag::err_illegal_decl_mempointer_to_void) |
| 3061 | << getPrintableNameForEntity(Entity); |
| 3062 | return QualType(); |
| 3063 | } |
| 3064 | |
| 3065 | if (!Class->isDependentType() && !Class->isRecordType()) { |
| 3066 | Diag(Loc, diag::err_mempointer_in_nonclass_type) << Class; |
| 3067 | return QualType(); |
| 3068 | } |
| 3069 | |
| 3070 | if (T->isFunctionType() && getLangOpts().OpenCL && |
| 3071 | !getOpenCLOptions().isAvailableOption("__cl_clang_function_pointers", |
| 3072 | getLangOpts())) { |
| 3073 | Diag(Loc, diag::err_opencl_function_pointer) << /*pointer*/ 0; |
| 3074 | return QualType(); |
| 3075 | } |
| 3076 | |
| 3077 | if (getLangOpts().HLSL && Loc.isValid()) { |
| 3078 | Diag(Loc, diag::err_hlsl_pointers_unsupported) << 0; |
| 3079 | return QualType(); |
| 3080 | } |
| 3081 | |
| 3082 | // Adjust the default free function calling convention to the default method |
| 3083 | // calling convention. |
| 3084 | bool IsCtorOrDtor = |
| 3085 | (Entity.getNameKind() == DeclarationName::CXXConstructorName) || |
| 3086 | (Entity.getNameKind() == DeclarationName::CXXDestructorName); |
| 3087 | if (T->isFunctionType()) |
| 3088 | adjustMemberFunctionCC(T, /*IsStatic=*/false, IsCtorOrDtor, Loc); |
| 3089 | |
| 3090 | return Context.getMemberPointerType(T, Class.getTypePtr()); |
| 3091 | } |
| 3092 | |
| 3093 | /// Build a block pointer type. |
| 3094 | /// |
| 3095 | /// \param T The type to which we'll be building a block pointer. |
| 3096 | /// |
| 3097 | /// \param Loc The source location, used for diagnostics. |
| 3098 | /// |
| 3099 | /// \param Entity The name of the entity that involves the block pointer |
| 3100 | /// type, if known. |
| 3101 | /// |
| 3102 | /// \returns A suitable block pointer type, if there are no |
| 3103 | /// errors. Otherwise, returns a NULL type. |
| 3104 | QualType Sema::BuildBlockPointerType(QualType T, |
| 3105 | SourceLocation Loc, |
| 3106 | DeclarationName Entity) { |
| 3107 | if (!T->isFunctionType()) { |
| 3108 | Diag(Loc, diag::err_nonfunction_block_type); |
| 3109 | return QualType(); |
| 3110 | } |
| 3111 | |
| 3112 | if (checkQualifiedFunction(*this, T, Loc, QFK_BlockPointer)) |
| 3113 | return QualType(); |
| 3114 | |
| 3115 | if (getLangOpts().OpenCL) |
| 3116 | T = deduceOpenCLPointeeAddrSpace(*this, T); |
| 3117 | |
| 3118 | return Context.getBlockPointerType(T); |
| 3119 | } |
| 3120 | |
| 3121 | QualType Sema::GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo) { |
| 3122 | QualType QT = Ty.get(); |
| 3123 | if (QT.isNull()) { |
| 3124 | if (TInfo) *TInfo = nullptr; |
| 3125 | return QualType(); |
| 3126 | } |
| 3127 | |
| 3128 | TypeSourceInfo *DI = nullptr; |
| 3129 | if (const LocInfoType *LIT = dyn_cast<LocInfoType>(QT)) { |
| 3130 | QT = LIT->getType(); |
| 3131 | DI = LIT->getTypeSourceInfo(); |
| 3132 | } |
| 3133 | |
| 3134 | if (TInfo) *TInfo = DI; |
| 3135 | return QT; |
| 3136 | } |
| 3137 | |
| 3138 | static void transferARCOwnershipToDeclaratorChunk(TypeProcessingState &state, |
| 3139 | Qualifiers::ObjCLifetime ownership, |
| 3140 | unsigned chunkIndex); |
| 3141 | |
| 3142 | /// Given that this is the declaration of a parameter under ARC, |
| 3143 | /// attempt to infer attributes and such for pointer-to-whatever |
| 3144 | /// types. |
| 3145 | static void inferARCWriteback(TypeProcessingState &state, |
| 3146 | QualType &declSpecType) { |
| 3147 | Sema &S = state.getSema(); |
| 3148 | Declarator &declarator = state.getDeclarator(); |
| 3149 | |
| 3150 | // TODO: should we care about decl qualifiers? |
| 3151 | |
| 3152 | // Check whether the declarator has the expected form. We walk |
| 3153 | // from the inside out in order to make the block logic work. |
| 3154 | unsigned outermostPointerIndex = 0; |
| 3155 | bool isBlockPointer = false; |
| 3156 | unsigned numPointers = 0; |
| 3157 | for (unsigned i = 0, e = declarator.getNumTypeObjects(); i != e; ++i) { |
| 3158 | unsigned chunkIndex = i; |
| 3159 | DeclaratorChunk &chunk = declarator.getTypeObject(chunkIndex); |
| 3160 | switch (chunk.Kind) { |
| 3161 | case DeclaratorChunk::Paren: |
| 3162 | // Ignore parens. |
| 3163 | break; |
| 3164 | |
| 3165 | case DeclaratorChunk::Reference: |
| 3166 | case DeclaratorChunk::Pointer: |
| 3167 | // Count the number of pointers. Treat references |
| 3168 | // interchangeably as pointers; if they're mis-ordered, normal |
| 3169 | // type building will discover that. |
| 3170 | outermostPointerIndex = chunkIndex; |
| 3171 | numPointers++; |
| 3172 | break; |
| 3173 | |
| 3174 | case DeclaratorChunk::BlockPointer: |
| 3175 | // If we have a pointer to block pointer, that's an acceptable |
| 3176 | // indirect reference; anything else is not an application of |
| 3177 | // the rules. |
| 3178 | if (numPointers != 1) return; |
| 3179 | numPointers++; |
| 3180 | outermostPointerIndex = chunkIndex; |
| 3181 | isBlockPointer = true; |
| 3182 | |
| 3183 | // We don't care about pointer structure in return values here. |
| 3184 | goto done; |
| 3185 | |
| 3186 | case DeclaratorChunk::Array: // suppress if written (id[])? |
| 3187 | case DeclaratorChunk::Function: |
| 3188 | case DeclaratorChunk::MemberPointer: |
| 3189 | case DeclaratorChunk::Pipe: |
| 3190 | return; |
| 3191 | } |
| 3192 | } |
| 3193 | done: |
| 3194 | |
| 3195 | // If we have *one* pointer, then we want to throw the qualifier on |
| 3196 | // the declaration-specifiers, which means that it needs to be a |
| 3197 | // retainable object type. |
| 3198 | if (numPointers == 1) { |
| 3199 | // If it's not a retainable object type, the rule doesn't apply. |
| 3200 | if (!declSpecType->isObjCRetainableType()) return; |
| 3201 | |
| 3202 | // If it already has lifetime, don't do anything. |
| 3203 | if (declSpecType.getObjCLifetime()) return; |
| 3204 | |
| 3205 | // Otherwise, modify the type in-place. |
| 3206 | Qualifiers qs; |
| 3207 | |
| 3208 | if (declSpecType->isObjCARCImplicitlyUnretainedType()) |
| 3209 | qs.addObjCLifetime(Qualifiers::OCL_ExplicitNone); |
| 3210 | else |
| 3211 | qs.addObjCLifetime(Qualifiers::OCL_Autoreleasing); |
| 3212 | declSpecType = S.Context.getQualifiedType(declSpecType, qs); |
| 3213 | |
| 3214 | // If we have *two* pointers, then we want to throw the qualifier on |
| 3215 | // the outermost pointer. |
| 3216 | } else if (numPointers == 2) { |
| 3217 | // If we don't have a block pointer, we need to check whether the |
| 3218 | // declaration-specifiers gave us something that will turn into a |
| 3219 | // retainable object pointer after we slap the first pointer on it. |
| 3220 | if (!isBlockPointer && !declSpecType->isObjCObjectType()) |
| 3221 | return; |
| 3222 | |
| 3223 | // Look for an explicit lifetime attribute there. |
| 3224 | DeclaratorChunk &chunk = declarator.getTypeObject(outermostPointerIndex); |
| 3225 | if (chunk.Kind != DeclaratorChunk::Pointer && |
| 3226 | chunk.Kind != DeclaratorChunk::BlockPointer) |
| 3227 | return; |
| 3228 | for (const ParsedAttr &AL : chunk.getAttrs()) |
| 3229 | if (AL.getKind() == ParsedAttr::AT_ObjCOwnership) |
| 3230 | return; |
| 3231 | |
| 3232 | transferARCOwnershipToDeclaratorChunk(state, Qualifiers::OCL_Autoreleasing, |
| 3233 | outermostPointerIndex); |
| 3234 | |
| 3235 | // Any other number of pointers/references does not trigger the rule. |
| 3236 | } else return; |
| 3237 | |
| 3238 | // TODO: mark whether we did this inference? |
| 3239 | } |
| 3240 | |
| 3241 | void Sema::diagnoseIgnoredQualifiers(unsigned DiagID, unsigned Quals, |
| 3242 | SourceLocation FallbackLoc, |
| 3243 | SourceLocation ConstQualLoc, |
| 3244 | SourceLocation VolatileQualLoc, |
| 3245 | SourceLocation RestrictQualLoc, |
| 3246 | SourceLocation AtomicQualLoc, |
| 3247 | SourceLocation UnalignedQualLoc) { |
| 3248 | if (!Quals) |
| 3249 | return; |
| 3250 | |
| 3251 | struct Qual { |
| 3252 | const char *Name; |
| 3253 | unsigned Mask; |
| 3254 | SourceLocation Loc; |
| 3255 | } const QualKinds[5] = { |
| 3256 | { "const", DeclSpec::TQ_const, ConstQualLoc }, |
| 3257 | { "volatile", DeclSpec::TQ_volatile, VolatileQualLoc }, |
| 3258 | { "restrict", DeclSpec::TQ_restrict, RestrictQualLoc }, |
| 3259 | { "__unaligned", DeclSpec::TQ_unaligned, UnalignedQualLoc }, |
| 3260 | { "_Atomic", DeclSpec::TQ_atomic, AtomicQualLoc } |
| 3261 | }; |
| 3262 | |
| 3263 | SmallString<32> QualStr; |
| 3264 | unsigned NumQuals = 0; |
| 3265 | SourceLocation Loc; |
| 3266 | FixItHint FixIts[5]; |
| 3267 | |
| 3268 | // Build a string naming the redundant qualifiers. |
| 3269 | for (auto &E : QualKinds) { |
| 3270 | if (Quals & E.Mask) { |
| 3271 | if (!QualStr.empty()) QualStr += ' '; |
| 3272 | QualStr += E.Name; |
| 3273 | |
| 3274 | // If we have a location for the qualifier, offer a fixit. |
| 3275 | SourceLocation QualLoc = E.Loc; |
| 3276 | if (QualLoc.isValid()) { |
| 3277 | FixIts[NumQuals] = FixItHint::CreateRemoval(QualLoc); |
| 3278 | if (Loc.isInvalid() || |
| 3279 | getSourceManager().isBeforeInTranslationUnit(QualLoc, Loc)) |
| 3280 | Loc = QualLoc; |
| 3281 | } |
| 3282 | |
| 3283 | ++NumQuals; |
| 3284 | } |
| 3285 | } |
| 3286 | |
| 3287 | Diag(Loc.isInvalid() ? FallbackLoc : Loc, DiagID) |
| 3288 | << QualStr << NumQuals << FixIts[0] << FixIts[1] << FixIts[2] << FixIts[3]; |
| 3289 | } |
| 3290 | |
| 3291 | // Diagnose pointless type qualifiers on the return type of a function. |
| 3292 | static void diagnoseRedundantReturnTypeQualifiers(Sema &S, QualType RetTy, |
| 3293 | Declarator &D, |
| 3294 | unsigned FunctionChunkIndex) { |
| 3295 | const DeclaratorChunk::FunctionTypeInfo &FTI = |
| 3296 | D.getTypeObject(FunctionChunkIndex).Fun; |
| 3297 | if (FTI.hasTrailingReturnType()) { |
| 3298 | S.diagnoseIgnoredQualifiers(diag::warn_qual_return_type, |
| 3299 | RetTy.getLocalCVRQualifiers(), |
| 3300 | FTI.getTrailingReturnTypeLoc()); |
| 3301 | return; |
| 3302 | } |
| 3303 | |
| 3304 | for (unsigned OuterChunkIndex = FunctionChunkIndex + 1, |
| 3305 | End = D.getNumTypeObjects(); |
| 3306 | OuterChunkIndex != End; ++OuterChunkIndex) { |
| 3307 | DeclaratorChunk &OuterChunk = D.getTypeObject(OuterChunkIndex); |
| 3308 | switch (OuterChunk.Kind) { |
| 3309 | case DeclaratorChunk::Paren: |
| 3310 | continue; |
| 3311 | |
| 3312 | case DeclaratorChunk::Pointer: { |
| 3313 | DeclaratorChunk::PointerTypeInfo &PTI = OuterChunk.Ptr; |
| 3314 | S.diagnoseIgnoredQualifiers( |
| 3315 | diag::warn_qual_return_type, |
| 3316 | PTI.TypeQuals, |
| 3317 | SourceLocation(), |
| 3318 | PTI.ConstQualLoc, |
| 3319 | PTI.VolatileQualLoc, |
| 3320 | PTI.RestrictQualLoc, |
| 3321 | PTI.AtomicQualLoc, |
| 3322 | PTI.UnalignedQualLoc); |
| 3323 | return; |
| 3324 | } |
| 3325 | |
| 3326 | case DeclaratorChunk::Function: |
| 3327 | case DeclaratorChunk::BlockPointer: |
| 3328 | case DeclaratorChunk::Reference: |
| 3329 | case DeclaratorChunk::Array: |
| 3330 | case DeclaratorChunk::MemberPointer: |
| 3331 | case DeclaratorChunk::Pipe: |
| 3332 | // FIXME: We can't currently provide an accurate source location and a |
| 3333 | // fix-it hint for these. |
| 3334 | unsigned AtomicQual = RetTy->isAtomicType() ? DeclSpec::TQ_atomic : 0; |
| 3335 | S.diagnoseIgnoredQualifiers(diag::warn_qual_return_type, |
| 3336 | RetTy.getCVRQualifiers() | AtomicQual, |
| 3337 | D.getIdentifierLoc()); |
| 3338 | return; |
| 3339 | } |
| 3340 | |
| 3341 | llvm_unreachable("unknown declarator chunk kind")::llvm::llvm_unreachable_internal("unknown declarator chunk kind" , "clang/lib/Sema/SemaType.cpp", 3341); |
| 3342 | } |
| 3343 | |
| 3344 | // If the qualifiers come from a conversion function type, don't diagnose |
| 3345 | // them -- they're not necessarily redundant, since such a conversion |
| 3346 | // operator can be explicitly called as "x.operator const int()". |
| 3347 | if (D.getName().getKind() == UnqualifiedIdKind::IK_ConversionFunctionId) |
| 3348 | return; |
| 3349 | |
| 3350 | // Just parens all the way out to the decl specifiers. Diagnose any qualifiers |
| 3351 | // which are present there. |
| 3352 | S.diagnoseIgnoredQualifiers(diag::warn_qual_return_type, |
| 3353 | D.getDeclSpec().getTypeQualifiers(), |
| 3354 | D.getIdentifierLoc(), |
| 3355 | D.getDeclSpec().getConstSpecLoc(), |
| 3356 | D.getDeclSpec().getVolatileSpecLoc(), |
| 3357 | D.getDeclSpec().getRestrictSpecLoc(), |
| 3358 | D.getDeclSpec().getAtomicSpecLoc(), |
| 3359 | D.getDeclSpec().getUnalignedSpecLoc()); |
| 3360 | } |
| 3361 | |
| 3362 | static std::pair<QualType, TypeSourceInfo *> |
| 3363 | InventTemplateParameter(TypeProcessingState &state, QualType T, |
| 3364 | TypeSourceInfo *TrailingTSI, AutoType *Auto, |
| 3365 | InventedTemplateParameterInfo &Info) { |
| 3366 | Sema &S = state.getSema(); |
| 3367 | Declarator &D = state.getDeclarator(); |
| 3368 | |
| 3369 | const unsigned TemplateParameterDepth = Info.AutoTemplateParameterDepth; |
| 3370 | const unsigned AutoParameterPosition = Info.TemplateParams.size(); |
| 3371 | const bool IsParameterPack = D.hasEllipsis(); |
| 3372 | |
| 3373 | // If auto is mentioned in a lambda parameter or abbreviated function |
| 3374 | // template context, convert it to a template parameter type. |
| 3375 | |
| 3376 | // Create the TemplateTypeParmDecl here to retrieve the corresponding |
| 3377 | // template parameter type. Template parameters are temporarily added |
| 3378 | // to the TU until the associated TemplateDecl is created. |
| 3379 | TemplateTypeParmDecl *InventedTemplateParam = |
| 3380 | TemplateTypeParmDecl::Create( |
| 3381 | S.Context, S.Context.getTranslationUnitDecl(), |
| 3382 | /*KeyLoc=*/D.getDeclSpec().getTypeSpecTypeLoc(), |
| 3383 | /*NameLoc=*/D.getIdentifierLoc(), |
| 3384 | TemplateParameterDepth, AutoParameterPosition, |
| 3385 | S.InventAbbreviatedTemplateParameterTypeName( |
| 3386 | D.getIdentifier(), AutoParameterPosition), false, |
| 3387 | IsParameterPack, /*HasTypeConstraint=*/Auto->isConstrained()); |
| 3388 | InventedTemplateParam->setImplicit(); |
| 3389 | Info.TemplateParams.push_back(InventedTemplateParam); |
| 3390 | |
| 3391 | // Attach type constraints to the new parameter. |
| 3392 | if (Auto->isConstrained()) { |
| 3393 | if (TrailingTSI) { |
| 3394 | // The 'auto' appears in a trailing return type we've already built; |
| 3395 | // extract its type constraints to attach to the template parameter. |
| 3396 | AutoTypeLoc AutoLoc = TrailingTSI->getTypeLoc().getContainedAutoTypeLoc(); |
| 3397 | TemplateArgumentListInfo TAL(AutoLoc.getLAngleLoc(), AutoLoc.getRAngleLoc()); |
| 3398 | bool Invalid = false; |
| 3399 | for (unsigned Idx = 0; Idx < AutoLoc.getNumArgs(); ++Idx) { |
| 3400 | if (D.getEllipsisLoc().isInvalid() && !Invalid && |
| 3401 | S.DiagnoseUnexpandedParameterPack(AutoLoc.getArgLoc(Idx), |
| 3402 | Sema::UPPC_TypeConstraint)) |
| 3403 | Invalid = true; |
| 3404 | TAL.addArgument(AutoLoc.getArgLoc(Idx)); |
| 3405 | } |
| 3406 | |
| 3407 | if (!Invalid) { |
| 3408 | S.AttachTypeConstraint( |
| 3409 | AutoLoc.getNestedNameSpecifierLoc(), AutoLoc.getConceptNameInfo(), |
| 3410 | AutoLoc.getNamedConcept(), |
| 3411 | AutoLoc.hasExplicitTemplateArgs() ? &TAL : nullptr, |
| 3412 | InventedTemplateParam, D.getEllipsisLoc()); |
| 3413 | } |
| 3414 | } else { |
| 3415 | // The 'auto' appears in the decl-specifiers; we've not finished forming |
| 3416 | // TypeSourceInfo for it yet. |
| 3417 | TemplateIdAnnotation *TemplateId = D.getDeclSpec().getRepAsTemplateId(); |
| 3418 | TemplateArgumentListInfo TemplateArgsInfo; |
| 3419 | bool Invalid = false; |
| 3420 | if (TemplateId->LAngleLoc.isValid()) { |
| 3421 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), |
| 3422 | TemplateId->NumArgs); |
| 3423 | S.translateTemplateArguments(TemplateArgsPtr, TemplateArgsInfo); |
| 3424 | |
| 3425 | if (D.getEllipsisLoc().isInvalid()) { |
| 3426 | for (TemplateArgumentLoc Arg : TemplateArgsInfo.arguments()) { |
| 3427 | if (S.DiagnoseUnexpandedParameterPack(Arg, |
| 3428 | Sema::UPPC_TypeConstraint)) { |
| 3429 | Invalid = true; |
| 3430 | break; |
| 3431 | } |
| 3432 | } |
| 3433 | } |
| 3434 | } |
| 3435 | if (!Invalid) { |
| 3436 | S.AttachTypeConstraint( |
| 3437 | D.getDeclSpec().getTypeSpecScope().getWithLocInContext(S.Context), |
| 3438 | DeclarationNameInfo(DeclarationName(TemplateId->Name), |
| 3439 | TemplateId->TemplateNameLoc), |
| 3440 | cast<ConceptDecl>(TemplateId->Template.get().getAsTemplateDecl()), |
| 3441 | TemplateId->LAngleLoc.isValid() ? &TemplateArgsInfo : nullptr, |
| 3442 | InventedTemplateParam, D.getEllipsisLoc()); |
| 3443 | } |
| 3444 | } |
| 3445 | } |
| 3446 | |
| 3447 | // Replace the 'auto' in the function parameter with this invented |
| 3448 | // template type parameter. |
| 3449 | // FIXME: Retain some type sugar to indicate that this was written |
| 3450 | // as 'auto'? |
| 3451 | QualType Replacement(InventedTemplateParam->getTypeForDecl(), 0); |
| 3452 | QualType NewT = state.ReplaceAutoType(T, Replacement); |
| 3453 | TypeSourceInfo *NewTSI = |
| 3454 | TrailingTSI ? S.ReplaceAutoTypeSourceInfo(TrailingTSI, Replacement) |
| 3455 | : nullptr; |
| 3456 | return {NewT, NewTSI}; |
| 3457 | } |
| 3458 | |
| 3459 | static TypeSourceInfo * |
| 3460 | GetTypeSourceInfoForDeclarator(TypeProcessingState &State, |
| 3461 | QualType T, TypeSourceInfo *ReturnTypeInfo); |
| 3462 | |
| 3463 | static QualType GetDeclSpecTypeForDeclarator(TypeProcessingState &state, |
| 3464 | TypeSourceInfo *&ReturnTypeInfo) { |
| 3465 | Sema &SemaRef = state.getSema(); |
| 3466 | Declarator &D = state.getDeclarator(); |
| 3467 | QualType T; |
| 3468 | ReturnTypeInfo = nullptr; |
| 3469 | |
| 3470 | // The TagDecl owned by the DeclSpec. |
| 3471 | TagDecl *OwnedTagDecl = nullptr; |
| 3472 | |
| 3473 | switch (D.getName().getKind()) { |
| 3474 | case UnqualifiedIdKind::IK_ImplicitSelfParam: |
| 3475 | case UnqualifiedIdKind::IK_OperatorFunctionId: |
| 3476 | case UnqualifiedIdKind::IK_Identifier: |
| 3477 | case UnqualifiedIdKind::IK_LiteralOperatorId: |
| 3478 | case UnqualifiedIdKind::IK_TemplateId: |
| 3479 | T = ConvertDeclSpecToType(state); |
| 3480 | |
| 3481 | if (!D.isInvalidType() && D.getDeclSpec().isTypeSpecOwned()) { |
| 3482 | OwnedTagDecl = cast<TagDecl>(D.getDeclSpec().getRepAsDecl()); |
| 3483 | // Owned declaration is embedded in declarator. |
| 3484 | OwnedTagDecl->setEmbeddedInDeclarator(true); |
| 3485 | } |
| 3486 | break; |
| 3487 | |
| 3488 | case UnqualifiedIdKind::IK_ConstructorName: |
| 3489 | case UnqualifiedIdKind::IK_ConstructorTemplateId: |
| 3490 | case UnqualifiedIdKind::IK_DestructorName: |
| 3491 | // Constructors and destructors don't have return types. Use |
| 3492 | // "void" instead. |
| 3493 | T = SemaRef.Context.VoidTy; |
| 3494 | processTypeAttrs(state, T, TAL_DeclSpec, |
| 3495 | D.getMutableDeclSpec().getAttributes()); |
| 3496 | break; |
| 3497 | |
| 3498 | case UnqualifiedIdKind::IK_DeductionGuideName: |
| 3499 | // Deduction guides have a trailing return type and no type in their |
| 3500 | // decl-specifier sequence. Use a placeholder return type for now. |
| 3501 | T = SemaRef.Context.DependentTy; |
| 3502 | break; |
| 3503 | |
| 3504 | case UnqualifiedIdKind::IK_ConversionFunctionId: |
| 3505 | // The result type of a conversion function is the type that it |
| 3506 | // converts to. |
| 3507 | T = SemaRef.GetTypeFromParser(D.getName().ConversionFunctionId, |
| 3508 | &ReturnTypeInfo); |
| 3509 | break; |
| 3510 | } |
| 3511 | |
| 3512 | // Note: We don't need to distribute declaration attributes (i.e. |
| 3513 | // D.getDeclarationAttributes()) because those are always C++11 attributes, |
| 3514 | // and those don't get distributed. |
| 3515 | distributeTypeAttrsFromDeclarator(state, T); |
| 3516 | |
| 3517 | // Find the deduced type in this type. Look in the trailing return type if we |
| 3518 | // have one, otherwise in the DeclSpec type. |
| 3519 | // FIXME: The standard wording doesn't currently describe this. |
| 3520 | DeducedType *Deduced = T->getContainedDeducedType(); |
| 3521 | bool DeducedIsTrailingReturnType = false; |
| 3522 | if (Deduced && isa<AutoType>(Deduced) && D.hasTrailingReturnType()) { |
| 3523 | QualType T = SemaRef.GetTypeFromParser(D.getTrailingReturnType()); |
| 3524 | Deduced = T.isNull() ? nullptr : T->getContainedDeducedType(); |
| 3525 | DeducedIsTrailingReturnType = true; |
| 3526 | } |
| 3527 | |
| 3528 | // C++11 [dcl.spec.auto]p5: reject 'auto' if it is not in an allowed context. |
| 3529 | if (Deduced) { |
| 3530 | AutoType *Auto = dyn_cast<AutoType>(Deduced); |
| 3531 | int Error = -1; |
| 3532 | |
| 3533 | // Is this a 'auto' or 'decltype(auto)' type (as opposed to __auto_type or |
| 3534 | // class template argument deduction)? |
| 3535 | bool IsCXXAutoType = |
| 3536 | (Auto && Auto->getKeyword() != AutoTypeKeyword::GNUAutoType); |
| 3537 | bool IsDeducedReturnType = false; |
| 3538 | |
| 3539 | switch (D.getContext()) { |
| 3540 | case DeclaratorContext::LambdaExpr: |
| 3541 | // Declared return type of a lambda-declarator is implicit and is always |
| 3542 | // 'auto'. |
| 3543 | break; |
| 3544 | case DeclaratorContext::ObjCParameter: |
| 3545 | case DeclaratorContext::ObjCResult: |
| 3546 | Error = 0; |
| 3547 | break; |
| 3548 | case DeclaratorContext::RequiresExpr: |
| 3549 | Error = 22; |
| 3550 | break; |
| 3551 | case DeclaratorContext::Prototype: |
| 3552 | case DeclaratorContext::LambdaExprParameter: { |
| 3553 | InventedTemplateParameterInfo *Info = nullptr; |
| 3554 | if (D.getContext() == DeclaratorContext::Prototype) { |
| 3555 | // With concepts we allow 'auto' in function parameters. |
| 3556 | if (!SemaRef.getLangOpts().CPlusPlus20 || !Auto || |
| 3557 | Auto->getKeyword() != AutoTypeKeyword::Auto) { |
| 3558 | Error = 0; |
| 3559 | break; |
| 3560 | } else if (!SemaRef.getCurScope()->isFunctionDeclarationScope()) { |
| 3561 | Error = 21; |
| 3562 | break; |
| 3563 | } |
| 3564 | |
| 3565 | Info = &SemaRef.InventedParameterInfos.back(); |
| 3566 | } else { |
| 3567 | // In C++14, generic lambdas allow 'auto' in their parameters. |
| 3568 | if (!SemaRef.getLangOpts().CPlusPlus14 || !Auto || |
| 3569 | Auto->getKeyword() != AutoTypeKeyword::Auto) { |
| 3570 | Error = 16; |
| 3571 | break; |
| 3572 | } |
| 3573 | Info = SemaRef.getCurLambda(); |
| 3574 | assert(Info && "No LambdaScopeInfo on the stack!")(static_cast <bool> (Info && "No LambdaScopeInfo on the stack!" ) ? void (0) : __assert_fail ("Info && \"No LambdaScopeInfo on the stack!\"" , "clang/lib/Sema/SemaType.cpp", 3574, __extension__ __PRETTY_FUNCTION__ )); |
| 3575 | } |
| 3576 | |
| 3577 | // We'll deal with inventing template parameters for 'auto' in trailing |
| 3578 | // return types when we pick up the trailing return type when processing |
| 3579 | // the function chunk. |
| 3580 | if (!DeducedIsTrailingReturnType) |
| 3581 | T = InventTemplateParameter(state, T, nullptr, Auto, *Info).first; |
| 3582 | break; |
| 3583 | } |
| 3584 | case DeclaratorContext::Member: { |
| 3585 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static || |
| 3586 | D.isFunctionDeclarator()) |
| 3587 | break; |
| 3588 | bool Cxx = SemaRef.getLangOpts().CPlusPlus; |
| 3589 | if (isa<ObjCContainerDecl>(SemaRef.CurContext)) { |
| 3590 | Error = 6; // Interface member. |
| 3591 | } else { |
| 3592 | switch (cast<TagDecl>(SemaRef.CurContext)->getTagKind()) { |
| 3593 | case TTK_Enum: llvm_unreachable("unhandled tag kind")::llvm::llvm_unreachable_internal("unhandled tag kind", "clang/lib/Sema/SemaType.cpp" , 3593); |
| 3594 | case TTK_Struct: Error = Cxx ? 1 : 2; /* Struct member */ break; |
| 3595 | case TTK_Union: Error = Cxx ? 3 : 4; /* Union member */ break; |
| 3596 | case TTK_Class: Error = 5; /* Class member */ break; |
| 3597 | case TTK_Interface: Error = 6; /* Interface member */ break; |
| 3598 | } |
| 3599 | } |
| 3600 | if (D.getDeclSpec().isFriendSpecified()) |
| 3601 | Error = 20; // Friend type |
| 3602 | break; |
| 3603 | } |
| 3604 | case DeclaratorContext::CXXCatch: |
| 3605 | case DeclaratorContext::ObjCCatch: |
| 3606 | Error = 7; // Exception declaration |
| 3607 | break; |
| 3608 | case DeclaratorContext::TemplateParam: |
| 3609 | if (isa<DeducedTemplateSpecializationType>(Deduced) && |
| 3610 | !SemaRef.getLangOpts().CPlusPlus20) |
| 3611 | Error = 19; // Template parameter (until C++20) |
| 3612 | else if (!SemaRef.getLangOpts().CPlusPlus17) |
| 3613 | Error = 8; // Template parameter (until C++17) |
| 3614 | break; |
| 3615 | case DeclaratorContext::BlockLiteral: |
| 3616 | Error = 9; // Block literal |
| 3617 | break; |
| 3618 | case DeclaratorContext::TemplateArg: |
| 3619 | // Within a template argument list, a deduced template specialization |
| 3620 | // type will be reinterpreted as a template template argument. |
| 3621 | if (isa<DeducedTemplateSpecializationType>(Deduced) && |
| 3622 | !D.getNumTypeObjects() && |
| 3623 | D.getDeclSpec().getParsedSpecifiers() == DeclSpec::PQ_TypeSpecifier) |
| 3624 | break; |
| 3625 | [[fallthrough]]; |
| 3626 | case DeclaratorContext::TemplateTypeArg: |
| 3627 | Error = 10; // Template type argument |
| 3628 | break; |
| 3629 | case DeclaratorContext::AliasDecl: |
| 3630 | case DeclaratorContext::AliasTemplate: |
| 3631 | Error = 12; // Type alias |
| 3632 | break; |
| 3633 | case DeclaratorContext::TrailingReturn: |
| 3634 | case DeclaratorContext::TrailingReturnVar: |
| 3635 | if (!SemaRef.getLangOpts().CPlusPlus14 || !IsCXXAutoType) |
| 3636 | Error = 13; // Function return type |
| 3637 | IsDeducedReturnType = true; |
| 3638 | break; |
| 3639 | case DeclaratorContext::ConversionId: |
| 3640 | if (!SemaRef.getLangOpts().CPlusPlus14 || !IsCXXAutoType) |
| 3641 | Error = 14; // conversion-type-id |
| 3642 | IsDeducedReturnType = true; |
| 3643 | break; |
| 3644 | case DeclaratorContext::FunctionalCast: |
| 3645 | if (isa<DeducedTemplateSpecializationType>(Deduced)) |
| 3646 | break; |
| 3647 | if (SemaRef.getLangOpts().CPlusPlus2b && IsCXXAutoType && |
| 3648 | !Auto->isDecltypeAuto()) |
| 3649 | break; // auto(x) |
| 3650 | [[fallthrough]]; |
| 3651 | case DeclaratorContext::TypeName: |
| 3652 | case DeclaratorContext::Association: |
| 3653 | Error = 15; // Generic |
| 3654 | break; |
| 3655 | case DeclaratorContext::File: |
| 3656 | case DeclaratorContext::Block: |
| 3657 | case DeclaratorContext::ForInit: |
| 3658 | case DeclaratorContext::SelectionInit: |
| 3659 | case DeclaratorContext::Condition: |
| 3660 | // FIXME: P0091R3 (erroneously) does not permit class template argument |
| 3661 | // deduction in conditions, for-init-statements, and other declarations |
| 3662 | // that are not simple-declarations. |
| 3663 | break; |
| 3664 | case DeclaratorContext::CXXNew: |
| 3665 | // FIXME: P0091R3 does not permit class template argument deduction here, |
| 3666 | // but we follow GCC and allow it anyway. |
| 3667 | if (!IsCXXAutoType && !isa<DeducedTemplateSpecializationType>(Deduced)) |
| 3668 | Error = 17; // 'new' type |
| 3669 | break; |
| 3670 | case DeclaratorContext::KNRTypeList: |
| 3671 | Error = 18; // K&R function parameter |
| 3672 | break; |
| 3673 | } |
| 3674 | |
| 3675 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
| 3676 | Error = 11; |
| 3677 | |
| 3678 | // In Objective-C it is an error to use 'auto' on a function declarator |
| 3679 | // (and everywhere for '__auto_type'). |
| 3680 | if (D.isFunctionDeclarator() && |
| 3681 | (!SemaRef.getLangOpts().CPlusPlus11 || !IsCXXAutoType)) |
| 3682 | Error = 13; |
| 3683 | |
| 3684 | SourceRange AutoRange = D.getDeclSpec().getTypeSpecTypeLoc(); |
| 3685 | if (D.getName().getKind() == UnqualifiedIdKind::IK_ConversionFunctionId) |
| 3686 | AutoRange = D.getName().getSourceRange(); |
| 3687 | |
| 3688 | if (Error != -1) { |
| 3689 | unsigned Kind; |
| 3690 | if (Auto) { |
| 3691 | switch (Auto->getKeyword()) { |
| 3692 | case AutoTypeKeyword::Auto: Kind = 0; break; |
| 3693 | case AutoTypeKeyword::DecltypeAuto: Kind = 1; break; |
| 3694 | case AutoTypeKeyword::GNUAutoType: Kind = 2; break; |
| 3695 | } |
| 3696 | } else { |
| 3697 | assert(isa<DeducedTemplateSpecializationType>(Deduced) &&(static_cast <bool> (isa<DeducedTemplateSpecializationType >(Deduced) && "unknown auto type") ? void (0) : __assert_fail ("isa<DeducedTemplateSpecializationType>(Deduced) && \"unknown auto type\"" , "clang/lib/Sema/SemaType.cpp", 3698, __extension__ __PRETTY_FUNCTION__ )) |
| 3698 | "unknown auto type")(static_cast <bool> (isa<DeducedTemplateSpecializationType >(Deduced) && "unknown auto type") ? void (0) : __assert_fail ("isa<DeducedTemplateSpecializationType>(Deduced) && \"unknown auto type\"" , "clang/lib/Sema/SemaType.cpp", 3698, __extension__ __PRETTY_FUNCTION__ )); |
| 3699 | Kind = 3; |
| 3700 | } |
| 3701 | |
| 3702 | auto *DTST = dyn_cast<DeducedTemplateSpecializationType>(Deduced); |
| 3703 | TemplateName TN = DTST ? DTST->getTemplateName() : TemplateName(); |
| 3704 | |
| 3705 | SemaRef.Diag(AutoRange.getBegin(), diag::err_auto_not_allowed) |
| 3706 | << Kind << Error << (int)SemaRef.getTemplateNameKindForDiagnostics(TN) |
| 3707 | << QualType(Deduced, 0) << AutoRange; |
| 3708 | if (auto *TD = TN.getAsTemplateDecl()) |
| 3709 | SemaRef.Diag(TD->getLocation(), diag::note_template_decl_here); |
| 3710 | |
| 3711 | T = SemaRef.Context.IntTy; |
| 3712 | D.setInvalidType(true); |
| 3713 | } else if (Auto && D.getContext() != DeclaratorContext::LambdaExpr) { |
| 3714 | // If there was a trailing return type, we already got |
| 3715 | // warn_cxx98_compat_trailing_return_type in the parser. |
| 3716 | SemaRef.Diag(AutoRange.getBegin(), |
| 3717 | D.getContext() == DeclaratorContext::LambdaExprParameter |
| 3718 | ? diag::warn_cxx11_compat_generic_lambda |
| 3719 | : IsDeducedReturnType |
| 3720 | ? diag::warn_cxx11_compat_deduced_return_type |
| 3721 | : diag::warn_cxx98_compat_auto_type_specifier) |
| 3722 | << AutoRange; |
| 3723 | } |
| 3724 | } |
| 3725 | |
| 3726 | if (SemaRef.getLangOpts().CPlusPlus && |
| 3727 | OwnedTagDecl && OwnedTagDecl->isCompleteDefinition()) { |
| 3728 | // Check the contexts where C++ forbids the declaration of a new class |
| 3729 | // or enumeration in a type-specifier-seq. |
| 3730 | unsigned DiagID = 0; |
| 3731 | switch (D.getContext()) { |
| 3732 | case DeclaratorContext::TrailingReturn: |
| 3733 | case DeclaratorContext::TrailingReturnVar: |
| 3734 | // Class and enumeration definitions are syntactically not allowed in |
| 3735 | // trailing return types. |
| 3736 | llvm_unreachable("parser should not have allowed this")::llvm::llvm_unreachable_internal("parser should not have allowed this" , "clang/lib/Sema/SemaType.cpp", 3736); |
| 3737 | break; |
| 3738 | case DeclaratorContext::File: |
| 3739 | case DeclaratorContext::Member: |
| 3740 | case DeclaratorContext::Block: |
| 3741 | case DeclaratorContext::ForInit: |
| 3742 | case DeclaratorContext::SelectionInit: |
| 3743 | case DeclaratorContext::BlockLiteral: |
| 3744 | case DeclaratorContext::LambdaExpr: |
| 3745 | // C++11 [dcl.type]p3: |
| 3746 | // A type-specifier-seq shall not define a class or enumeration unless |
| 3747 | // it appears in the type-id of an alias-declaration (7.1.3) that is not |
| 3748 | // the declaration of a template-declaration. |
| 3749 | case DeclaratorContext::AliasDecl: |
| 3750 | break; |
| 3751 | case DeclaratorContext::AliasTemplate: |
| 3752 | DiagID = diag::err_type_defined_in_alias_template; |
| 3753 | break; |
| 3754 | case DeclaratorContext::TypeName: |
| 3755 | case DeclaratorContext::FunctionalCast: |
| 3756 | case DeclaratorContext::ConversionId: |
| 3757 | case DeclaratorContext::TemplateParam: |
| 3758 | case DeclaratorContext::CXXNew: |
| 3759 | case DeclaratorContext::CXXCatch: |
| 3760 | case DeclaratorContext::ObjCCatch: |
| 3761 | case DeclaratorContext::TemplateArg: |
| 3762 | case DeclaratorContext::TemplateTypeArg: |
| 3763 | case DeclaratorContext::Association: |
| 3764 | DiagID = diag::err_type_defined_in_type_specifier; |
| 3765 | break; |
| 3766 | case DeclaratorContext::Prototype: |
| 3767 | case DeclaratorContext::LambdaExprParameter: |
| 3768 | case DeclaratorContext::ObjCParameter: |
| 3769 | case DeclaratorContext::ObjCResult: |
| 3770 | case DeclaratorContext::KNRTypeList: |
| 3771 | case DeclaratorContext::RequiresExpr: |
| 3772 | // C++ [dcl.fct]p6: |
| 3773 | // Types shall not be defined in return or parameter types. |
| 3774 | DiagID = diag::err_type_defined_in_param_type; |
| 3775 | break; |
| 3776 | case DeclaratorContext::Condition: |
| 3777 | // C++ 6.4p2: |
| 3778 | // The type-specifier-seq shall not contain typedef and shall not declare |
| 3779 | // a new class or enumeration. |
| 3780 | DiagID = diag::err_type_defined_in_condition; |
| 3781 | break; |
| 3782 | } |
| 3783 | |
| 3784 | if (DiagID != 0) { |
| 3785 | SemaRef.Diag(OwnedTagDecl->getLocation(), DiagID) |
| 3786 | << SemaRef.Context.getTypeDeclType(OwnedTagDecl); |
| 3787 | D.setInvalidType(true); |
| 3788 | } |
| 3789 | } |
| 3790 | |
| 3791 | assert(!T.isNull() && "This function should not return a null type")(static_cast <bool> (!T.isNull() && "This function should not return a null type" ) ? void (0) : __assert_fail ("!T.isNull() && \"This function should not return a null type\"" , "clang/lib/Sema/SemaType.cpp", 3791, __extension__ __PRETTY_FUNCTION__ )); |
| 3792 | return T; |
| 3793 | } |
| 3794 | |
| 3795 | /// Produce an appropriate diagnostic for an ambiguity between a function |
| 3796 | /// declarator and a C++ direct-initializer. |
| 3797 | static void warnAboutAmbiguousFunction(Sema &S, Declarator &D, |
| 3798 | DeclaratorChunk &DeclType, QualType RT) { |
| 3799 | const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun; |
| 3800 | assert(FTI.isAmbiguous && "no direct-initializer / function ambiguity")(static_cast <bool> (FTI.isAmbiguous && "no direct-initializer / function ambiguity" ) ? void (0) : __assert_fail ("FTI.isAmbiguous && \"no direct-initializer / function ambiguity\"" , "clang/lib/Sema/SemaType.cpp", 3800, __extension__ __PRETTY_FUNCTION__ )); |
| 3801 | |
| 3802 | // If the return type is void there is no ambiguity. |
| 3803 | if (RT->isVoidType()) |
| 3804 | return; |
| 3805 | |
| 3806 | // An initializer for a non-class type can have at most one argument. |
| 3807 | if (!RT->isRecordType() && FTI.NumParams > 1) |
| 3808 | return; |
| 3809 | |
| 3810 | // An initializer for a reference must have exactly one argument. |
| 3811 | if (RT->isReferenceType() && FTI.NumParams != 1) |
| 3812 | return; |
| 3813 | |
| 3814 | // Only warn if this declarator is declaring a function at block scope, and |
| 3815 | // doesn't have a storage class (such as 'extern') specified. |
| 3816 | if (!D.isFunctionDeclarator() || |
| 3817 | D.getFunctionDefinitionKind() != FunctionDefinitionKind::Declaration || |
| 3818 | !S.CurContext->isFunctionOrMethod() || |
| 3819 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_unspecified) |
| 3820 | return; |
| 3821 | |
| 3822 | // Inside a condition, a direct initializer is not permitted. We allow one to |
| 3823 | // be parsed in order to give better diagnostics in condition parsing. |
| 3824 | if (D.getContext() == DeclaratorContext::Condition) |
| 3825 | return; |
| 3826 | |
| 3827 | SourceRange ParenRange(DeclType.Loc, DeclType.EndLoc); |
| 3828 | |
| 3829 | S.Diag(DeclType.Loc, |
| 3830 | FTI.NumParams ? diag::warn_parens_disambiguated_as_function_declaration |
| 3831 | : diag::warn_empty_parens_are_function_decl) |
| 3832 | << ParenRange; |
| 3833 | |
| 3834 | // If the declaration looks like: |
| 3835 | // T var1, |
| 3836 | // f(); |
| 3837 | // and name lookup finds a function named 'f', then the ',' was |
| 3838 | // probably intended to be a ';'. |
| 3839 | if (!D.isFirstDeclarator() && D.getIdentifier()) { |
| 3840 | FullSourceLoc Comma(D.getCommaLoc(), S.SourceMgr); |
| 3841 | FullSourceLoc Name(D.getIdentifierLoc(), S.SourceMgr); |
| 3842 | if (Comma.getFileID() != Name.getFileID() || |
| 3843 | Comma.getSpellingLineNumber() != Name.getSpellingLineNumber()) { |
| 3844 | LookupResult Result(S, D.getIdentifier(), SourceLocation(), |
| 3845 | Sema::LookupOrdinaryName); |
| 3846 | if (S.LookupName(Result, S.getCurScope())) |
| 3847 | S.Diag(D.getCommaLoc(), diag::note_empty_parens_function_call) |
| 3848 | << FixItHint::CreateReplacement(D.getCommaLoc(), ";") |
| 3849 | << D.getIdentifier(); |
| 3850 | Result.suppressDiagnostics(); |
| 3851 | } |
| 3852 | } |
| 3853 | |
| 3854 | if (FTI.NumParams > 0) { |
| 3855 | // For a declaration with parameters, eg. "T var(T());", suggest adding |
| 3856 | // parens around the first parameter to turn the declaration into a |
| 3857 | // variable declaration. |
| 3858 | SourceRange Range = FTI.Params[0].Param->getSourceRange(); |
| 3859 | SourceLocation B = Range.getBegin(); |
| 3860 | SourceLocation E = S.getLocForEndOfToken(Range.getEnd()); |
| 3861 | // FIXME: Maybe we should suggest adding braces instead of parens |
| 3862 | // in C++11 for classes that don't have an initializer_list constructor. |
| 3863 | S.Diag(B, diag::note_additional_parens_for_variable_declaration) |
| 3864 | << FixItHint::CreateInsertion(B, "(") |
| 3865 | << FixItHint::CreateInsertion(E, ")"); |
| 3866 | } else { |
| 3867 | // For a declaration without parameters, eg. "T var();", suggest replacing |
| 3868 | // the parens with an initializer to turn the declaration into a variable |
| 3869 | // declaration. |
| 3870 | const CXXRecordDecl *RD = RT->getAsCXXRecordDecl(); |
| 3871 | |
| 3872 | // Empty parens mean value-initialization, and no parens mean |
| 3873 | // default initialization. These are equivalent if the default |
| 3874 | // constructor is user-provided or if zero-initialization is a |
| 3875 | // no-op. |
| 3876 | if (RD && RD->hasDefinition() && |
| 3877 | (RD->isEmpty() || RD->hasUserProvidedDefaultConstructor())) |
| 3878 | S.Diag(DeclType.Loc, diag::note_empty_parens_default_ctor) |
| 3879 | << FixItHint::CreateRemoval(ParenRange); |
| 3880 | else { |
| 3881 | std::string Init = |
| 3882 | S.getFixItZeroInitializerForType(RT, ParenRange.getBegin()); |
| 3883 | if (Init.empty() && S.LangOpts.CPlusPlus11) |
| 3884 | Init = "{}"; |
| 3885 | if (!Init.empty()) |
| 3886 | S.Diag(DeclType.Loc, diag::note_empty_parens_zero_initialize) |
| 3887 | << FixItHint::CreateReplacement(ParenRange, Init); |
| 3888 | } |
| 3889 | } |
| 3890 | } |
| 3891 | |
| 3892 | /// Produce an appropriate diagnostic for a declarator with top-level |
| 3893 | /// parentheses. |
| 3894 | static void warnAboutRedundantParens(Sema &S, Declarator &D, QualType T) { |
| 3895 | DeclaratorChunk &Paren = D.getTypeObject(D.getNumTypeObjects() - 1); |
| 3896 | assert(Paren.Kind == DeclaratorChunk::Paren &&(static_cast <bool> (Paren.Kind == DeclaratorChunk::Paren && "do not have redundant top-level parentheses") ? void (0) : __assert_fail ("Paren.Kind == DeclaratorChunk::Paren && \"do not have redundant top-level parentheses\"" , "clang/lib/Sema/SemaType.cpp", 3897, __extension__ __PRETTY_FUNCTION__ )) |
| 3897 | "do not have redundant top-level parentheses")(static_cast <bool> (Paren.Kind == DeclaratorChunk::Paren && "do not have redundant top-level parentheses") ? void (0) : __assert_fail ("Paren.Kind == DeclaratorChunk::Paren && \"do not have redundant top-level parentheses\"" , "clang/lib/Sema/SemaType.cpp", 3897, __extension__ __PRETTY_FUNCTION__ )); |
| 3898 | |
| 3899 | // This is a syntactic check; we're not interested in cases that arise |
| 3900 | // during template instantiation. |
| 3901 | if (S.inTemplateInstantiation()) |
| 3902 | return; |
| 3903 | |
| 3904 | // Check whether this could be intended to be a construction of a temporary |
| 3905 | // object in C++ via a function-style cast. |
| 3906 | bool CouldBeTemporaryObject = |
| 3907 | S.getLangOpts().CPlusPlus && D.isExpressionContext() && |
| 3908 | !D.isInvalidType() && D.getIdentifier() && |
| 3909 | D.getDeclSpec().getParsedSpecifiers() == DeclSpec::PQ_TypeSpecifier && |
| 3910 | (T->isRecordType() || T->isDependentType()) && |
| 3911 | D.getDeclSpec().getTypeQualifiers() == 0 && D.isFirstDeclarator(); |
| 3912 | |
| 3913 | bool StartsWithDeclaratorId = true; |
| 3914 | for (auto &C : D.type_objects()) { |
| 3915 | switch (C.Kind) { |
| 3916 | case DeclaratorChunk::Paren: |
| 3917 | if (&C == &Paren) |
| 3918 | continue; |
| 3919 | [[fallthrough]]; |
| 3920 | case DeclaratorChunk::Pointer: |
| 3921 | StartsWithDeclaratorId = false; |
| 3922 | continue; |
| 3923 | |
| 3924 | case DeclaratorChunk::Array: |
| 3925 | if (!C.Arr.NumElts) |
| 3926 | CouldBeTemporaryObject = false; |
| 3927 | continue; |
| 3928 | |
| 3929 | case DeclaratorChunk::Reference: |
| 3930 | // FIXME: Suppress the warning here if there is no initializer; we're |
| 3931 | // going to give an error anyway. |
| 3932 | // We assume that something like 'T (&x) = y;' is highly likely to not |
| 3933 | // be intended to be a temporary object. |
| 3934 | CouldBeTemporaryObject = false; |
| 3935 | StartsWithDeclaratorId = false; |
| 3936 | continue; |
| 3937 | |
| 3938 | case DeclaratorChunk::Function: |
| 3939 | // In a new-type-id, function chunks require parentheses. |
| 3940 | if (D.getContext() == DeclaratorContext::CXXNew) |
| 3941 | return; |
| 3942 | // FIXME: "A(f())" deserves a vexing-parse warning, not just a |
| 3943 | // redundant-parens warning, but we don't know whether the function |
| 3944 | // chunk was syntactically valid as an expression here. |
| 3945 | CouldBeTemporaryObject = false; |
| 3946 | continue; |
| 3947 | |
| 3948 | case DeclaratorChunk::BlockPointer: |
| 3949 | case DeclaratorChunk::MemberPointer: |
| 3950 | case DeclaratorChunk::Pipe: |
| 3951 | // These cannot appear in expressions. |
| 3952 | CouldBeTemporaryObject = false; |
| 3953 | StartsWithDeclaratorId = false; |
| 3954 | continue; |
| 3955 | } |
| 3956 | } |
| 3957 | |
| 3958 | // FIXME: If there is an initializer, assume that this is not intended to be |
| 3959 | // a construction of a temporary object. |
| 3960 | |
| 3961 | // Check whether the name has already been declared; if not, this is not a |
| 3962 | // function-style cast. |
| 3963 | if (CouldBeTemporaryObject) { |
| 3964 | LookupResult Result(S, D.getIdentifier(), SourceLocation(), |
| 3965 | Sema::LookupOrdinaryName); |
| 3966 | if (!S.LookupName(Result, S.getCurScope())) |
| 3967 | CouldBeTemporaryObject = false; |
| 3968 | Result.suppressDiagnostics(); |
| 3969 | } |
| 3970 | |
| 3971 | SourceRange ParenRange(Paren.Loc, Paren.EndLoc); |
| 3972 | |
| 3973 | if (!CouldBeTemporaryObject) { |
| 3974 | // If we have A (::B), the parentheses affect the meaning of the program. |
| 3975 | // Suppress the warning in that case. Don't bother looking at the DeclSpec |
| 3976 | // here: even (e.g.) "int ::x" is visually ambiguous even though it's |
| 3977 | // formally unambiguous. |
| 3978 | if (StartsWithDeclaratorId && D.getCXXScopeSpec().isValid()) { |
| 3979 | for (NestedNameSpecifier *NNS = D.getCXXScopeSpec().getScopeRep(); NNS; |
| 3980 | NNS = NNS->getPrefix()) { |
| 3981 | if (NNS->getKind() == NestedNameSpecifier::Global) |
| 3982 | return; |
| 3983 | } |
| 3984 | } |
| 3985 | |
| 3986 | S.Diag(Paren.Loc, diag::warn_redundant_parens_around_declarator) |
| 3987 | << ParenRange << FixItHint::CreateRemoval(Paren.Loc) |
| 3988 | << FixItHint::CreateRemoval(Paren.EndLoc); |
| 3989 | return; |
| 3990 | } |
| 3991 | |
| 3992 | S.Diag(Paren.Loc, diag::warn_parens_disambiguated_as_variable_declaration) |
| 3993 | << ParenRange << D.getIdentifier(); |
| 3994 | auto *RD = T->getAsCXXRecordDecl(); |
| 3995 | if (!RD || !RD->hasDefinition() || RD->hasNonTrivialDestructor()) |
| 3996 | S.Diag(Paren.Loc, diag::note_raii_guard_add_name) |
| 3997 | << FixItHint::CreateInsertion(Paren.Loc, " varname") << T |
| 3998 | << D.getIdentifier(); |
| 3999 | // FIXME: A cast to void is probably a better suggestion in cases where it's |
| 4000 | // valid (when there is no initializer and we're not in a condition). |
| 4001 | S.Diag(D.getBeginLoc(), diag::note_function_style_cast_add_parentheses) |
| 4002 | << FixItHint::CreateInsertion(D.getBeginLoc(), "(") |
| 4003 | << FixItHint::CreateInsertion(S.getLocForEndOfToken(D.getEndLoc()), ")"); |
| 4004 | S.Diag(Paren.Loc, diag::note_remove_parens_for_variable_declaration) |
| 4005 | << FixItHint::CreateRemoval(Paren.Loc) |
| 4006 | << FixItHint::CreateRemoval(Paren.EndLoc); |
| 4007 | } |
| 4008 | |
| 4009 | /// Helper for figuring out the default CC for a function declarator type. If |
| 4010 | /// this is the outermost chunk, then we can determine the CC from the |
| 4011 | /// declarator context. If not, then this could be either a member function |
| 4012 | /// type or normal function type. |
| 4013 | static CallingConv getCCForDeclaratorChunk( |
| 4014 | Sema &S, Declarator &D, const ParsedAttributesView &AttrList, |
| 4015 | const DeclaratorChunk::FunctionTypeInfo &FTI, unsigned ChunkIndex) { |
| 4016 | assert(D.getTypeObject(ChunkIndex).Kind == DeclaratorChunk::Function)(static_cast <bool> (D.getTypeObject(ChunkIndex).Kind == DeclaratorChunk::Function) ? void (0) : __assert_fail ("D.getTypeObject(ChunkIndex).Kind == DeclaratorChunk::Function" , "clang/lib/Sema/SemaType.cpp", 4016, __extension__ __PRETTY_FUNCTION__ )); |
| 4017 | |
| 4018 | // Check for an explicit CC attribute. |
| 4019 | for (const ParsedAttr &AL : AttrList) { |
| 4020 | switch (AL.getKind()) { |
| 4021 | CALLING_CONV_ATTRS_CASELISTcase ParsedAttr::AT_CDecl: case ParsedAttr::AT_FastCall: case ParsedAttr::AT_StdCall: case ParsedAttr::AT_ThisCall: case ParsedAttr ::AT_RegCall: case ParsedAttr::AT_Pascal: case ParsedAttr::AT_SwiftCall : case ParsedAttr::AT_SwiftAsyncCall: case ParsedAttr::AT_VectorCall : case ParsedAttr::AT_AArch64VectorPcs: case ParsedAttr::AT_AArch64SVEPcs : case ParsedAttr::AT_AMDGPUKernelCall: case ParsedAttr::AT_MSABI : case ParsedAttr::AT_SysVABI: case ParsedAttr::AT_Pcs: case ParsedAttr ::AT_IntelOclBicc: case ParsedAttr::AT_PreserveMost: case ParsedAttr ::AT_PreserveAll : { |
| 4022 | // Ignore attributes that don't validate or can't apply to the |
| 4023 | // function type. We'll diagnose the failure to apply them in |
| 4024 | // handleFunctionTypeAttr. |
| 4025 | CallingConv CC; |
| 4026 | if (!S.CheckCallingConvAttr(AL, CC) && |
| 4027 | (!FTI.isVariadic || supportsVariadicCall(CC))) { |
| 4028 | return CC; |
| 4029 | } |
| 4030 | break; |
| 4031 | } |
| 4032 | |
| 4033 | default: |
| 4034 | break; |
| 4035 | } |
| 4036 | } |
| 4037 | |
| 4038 | bool IsCXXInstanceMethod = false; |
| 4039 | |
| 4040 | if (S.getLangOpts().CPlusPlus) { |
| 4041 | // Look inwards through parentheses to see if this chunk will form a |
| 4042 | // member pointer type or if we're the declarator. Any type attributes |
| 4043 | // between here and there will override the CC we choose here. |
| 4044 | unsigned I = ChunkIndex; |
| 4045 | bool FoundNonParen = false; |
| 4046 | while (I && !FoundNonParen) { |
| 4047 | --I; |
| 4048 | if (D.getTypeObject(I).Kind != DeclaratorChunk::Paren) |
| 4049 | FoundNonParen = true; |
| 4050 | } |
| 4051 | |
| 4052 | if (FoundNonParen) { |
| 4053 | // If we're not the declarator, we're a regular function type unless we're |
| 4054 | // in a member pointer. |
| 4055 | IsCXXInstanceMethod = |
| 4056 | D.getTypeObject(I).Kind == DeclaratorChunk::MemberPointer; |
| 4057 | } else if (D.getContext() == DeclaratorContext::LambdaExpr) { |
| 4058 | // This can only be a call operator for a lambda, which is an instance |
| 4059 | // method. |
| 4060 | IsCXXInstanceMethod = true; |
| 4061 | } else { |
| 4062 | // We're the innermost decl chunk, so must be a function declarator. |
| 4063 | assert(D.isFunctionDeclarator())(static_cast <bool> (D.isFunctionDeclarator()) ? void ( 0) : __assert_fail ("D.isFunctionDeclarator()", "clang/lib/Sema/SemaType.cpp" , 4063, __extension__ __PRETTY_FUNCTION__)); |
| 4064 | |
| 4065 | // If we're inside a record, we're declaring a method, but it could be |
| 4066 | // explicitly or implicitly static. |
| 4067 | IsCXXInstanceMethod = |
| 4068 | D.isFirstDeclarationOfMember() && |
| 4069 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && |
| 4070 | !D.isStaticMember(); |
| 4071 | } |
| 4072 | } |
| 4073 | |
| 4074 | CallingConv CC = S.Context.getDefaultCallingConvention(FTI.isVariadic, |
| 4075 | IsCXXInstanceMethod); |
| 4076 | |
| 4077 | // Attribute AT_OpenCLKernel affects the calling convention for SPIR |
| 4078 | // and AMDGPU targets, hence it cannot be treated as a calling |
| 4079 | // convention attribute. This is the simplest place to infer |
| 4080 | // calling convention for OpenCL kernels. |
| 4081 | if (S.getLangOpts().OpenCL) { |
| 4082 | for (const ParsedAttr &AL : D.getDeclSpec().getAttributes()) { |
| 4083 | if (AL.getKind() == ParsedAttr::AT_OpenCLKernel) { |
| 4084 | CC = CC_OpenCLKernel; |
| 4085 | break; |
| 4086 | } |
| 4087 | } |
| 4088 | } else if (S.getLangOpts().CUDA) { |
| 4089 | // If we're compiling CUDA/HIP code and targeting SPIR-V we need to make |
| 4090 | // sure the kernels will be marked with the right calling convention so that |
| 4091 | // they will be visible by the APIs that ingest SPIR-V. |
| 4092 | llvm::Triple Triple = S.Context.getTargetInfo().getTriple(); |
| 4093 | if (Triple.getArch() == llvm::Triple::spirv32 || |
| 4094 | Triple.getArch() == llvm::Triple::spirv64) { |
| 4095 | for (const ParsedAttr &AL : D.getDeclSpec().getAttributes()) { |
| 4096 | if (AL.getKind() == ParsedAttr::AT_CUDAGlobal) { |
| 4097 | CC = CC_OpenCLKernel; |
| 4098 | break; |
| 4099 | } |
| 4100 | } |
| 4101 | } |
| 4102 | } |
| 4103 | |
| 4104 | return CC; |
| 4105 | } |
| 4106 | |
| 4107 | namespace { |
| 4108 | /// A simple notion of pointer kinds, which matches up with the various |
| 4109 | /// pointer declarators. |
| 4110 | enum class SimplePointerKind { |
| 4111 | Pointer, |
| 4112 | BlockPointer, |
| 4113 | MemberPointer, |
| 4114 | Array, |
| 4115 | }; |
| 4116 | } // end anonymous namespace |
| 4117 | |
| 4118 | IdentifierInfo *Sema::getNullabilityKeyword(NullabilityKind nullability) { |
| 4119 | switch (nullability) { |
| 4120 | case NullabilityKind::NonNull: |
| 4121 | if (!Ident__Nonnull) |
| 4122 | Ident__Nonnull = PP.getIdentifierInfo("_Nonnull"); |
| 4123 | return Ident__Nonnull; |
| 4124 | |
| 4125 | case NullabilityKind::Nullable: |
| 4126 | if (!Ident__Nullable) |
| 4127 | Ident__Nullable = PP.getIdentifierInfo("_Nullable"); |
| 4128 | return Ident__Nullable; |
| 4129 | |
| 4130 | case NullabilityKind::NullableResult: |
| 4131 | if (!Ident__Nullable_result) |
| 4132 | Ident__Nullable_result = PP.getIdentifierInfo("_Nullable_result"); |
| 4133 | return Ident__Nullable_result; |
| 4134 | |
| 4135 | case NullabilityKind::Unspecified: |
| 4136 | if (!Ident__Null_unspecified) |
| 4137 | Ident__Null_unspecified = PP.getIdentifierInfo("_Null_unspecified"); |
| 4138 | return Ident__Null_unspecified; |
| 4139 | } |
| 4140 | llvm_unreachable("Unknown nullability kind.")::llvm::llvm_unreachable_internal("Unknown nullability kind." , "clang/lib/Sema/SemaType.cpp", 4140); |
| 4141 | } |
| 4142 | |
| 4143 | /// Retrieve the identifier "NSError". |
| 4144 | IdentifierInfo *Sema::getNSErrorIdent() { |
| 4145 | if (!Ident_NSError) |
| 4146 | Ident_NSError = PP.getIdentifierInfo("NSError"); |
| 4147 | |
| 4148 | return Ident_NSError; |
| 4149 | } |
| 4150 | |
| 4151 | /// Check whether there is a nullability attribute of any kind in the given |
| 4152 | /// attribute list. |
| 4153 | static bool hasNullabilityAttr(const ParsedAttributesView &attrs) { |
| 4154 | for (const ParsedAttr &AL : attrs) { |
| 4155 | if (AL.getKind() == ParsedAttr::AT_TypeNonNull || |
| 4156 | AL.getKind() == ParsedAttr::AT_TypeNullable || |
| 4157 | AL.getKind() == ParsedAttr::AT_TypeNullableResult || |
| 4158 | AL.getKind() == ParsedAttr::AT_TypeNullUnspecified) |
| 4159 | return true; |
| 4160 | } |
| 4161 | |
| 4162 | return false; |
| 4163 | } |
| 4164 | |
| 4165 | namespace { |
| 4166 | /// Describes the kind of a pointer a declarator describes. |
| 4167 | enum class PointerDeclaratorKind { |
| 4168 | // Not a pointer. |
| 4169 | NonPointer, |
| 4170 | // Single-level pointer. |
| 4171 | SingleLevelPointer, |
| 4172 | // Multi-level pointer (of any pointer kind). |
| 4173 | MultiLevelPointer, |
| 4174 | // CFFooRef* |
| 4175 | MaybePointerToCFRef, |
| 4176 | // CFErrorRef* |
| 4177 | CFErrorRefPointer, |
| 4178 | // NSError** |
| 4179 | NSErrorPointerPointer, |
| 4180 | }; |
| 4181 | |
| 4182 | /// Describes a declarator chunk wrapping a pointer that marks inference as |
| 4183 | /// unexpected. |
| 4184 | // These values must be kept in sync with diagnostics. |
| 4185 | enum class PointerWrappingDeclaratorKind { |
| 4186 | /// Pointer is top-level. |
| 4187 | None = -1, |
| 4188 | /// Pointer is an array element. |
| 4189 | Array = 0, |
| 4190 | /// Pointer is the referent type of a C++ reference. |
| 4191 | Reference = 1 |
| 4192 | }; |
| 4193 | } // end anonymous namespace |
| 4194 | |
| 4195 | /// Classify the given declarator, whose type-specified is \c type, based on |
| 4196 | /// what kind of pointer it refers to. |
| 4197 | /// |
| 4198 | /// This is used to determine the default nullability. |
| 4199 | static PointerDeclaratorKind |
| 4200 | classifyPointerDeclarator(Sema &S, QualType type, Declarator &declarator, |
| 4201 | PointerWrappingDeclaratorKind &wrappingKind) { |
| 4202 | unsigned numNormalPointers = 0; |
| 4203 | |
| 4204 | // For any dependent type, we consider it a non-pointer. |
| 4205 | if (type->isDependentType()) |
| 4206 | return PointerDeclaratorKind::NonPointer; |
| 4207 | |
| 4208 | // Look through the declarator chunks to identify pointers. |
| 4209 | for (unsigned i = 0, n = declarator.getNumTypeObjects(); i != n; ++i) { |
| 4210 | DeclaratorChunk &chunk = declarator.getTypeObject(i); |
| 4211 | switch (chunk.Kind) { |
| 4212 | case DeclaratorChunk::Array: |
| 4213 | if (numNormalPointers == 0) |
| 4214 | wrappingKind = PointerWrappingDeclaratorKind::Array; |
| 4215 | break; |
| 4216 | |
| 4217 | case DeclaratorChunk::Function: |
| 4218 | case DeclaratorChunk::Pipe: |
| 4219 | break; |
| 4220 | |
| 4221 | case DeclaratorChunk::BlockPointer: |
| 4222 | case DeclaratorChunk::MemberPointer: |
| 4223 | return numNormalPointers > 0 ? PointerDeclaratorKind::MultiLevelPointer |
| 4224 | : PointerDeclaratorKind::SingleLevelPointer; |
| 4225 | |
| 4226 | case DeclaratorChunk::Paren: |
| 4227 | break; |
| 4228 | |
| 4229 | case DeclaratorChunk::Reference: |
| 4230 | if (numNormalPointers == 0) |
| 4231 | wrappingKind = PointerWrappingDeclaratorKind::Reference; |
| 4232 | break; |
| 4233 | |
| 4234 | case DeclaratorChunk::Pointer: |
| 4235 | ++numNormalPointers; |
| 4236 | if (numNormalPointers > 2) |
| 4237 | return PointerDeclaratorKind::MultiLevelPointer; |
| 4238 | break; |
| 4239 | } |
| 4240 | } |
| 4241 | |
| 4242 | // Then, dig into the type specifier itself. |
| 4243 | unsigned numTypeSpecifierPointers = 0; |
| 4244 | do { |
| 4245 | // Decompose normal pointers. |
| 4246 | if (auto ptrType = type->getAs<PointerType>()) { |
| 4247 | ++numNormalPointers; |
| 4248 | |
| 4249 | if (numNormalPointers > 2) |
| 4250 | return PointerDeclaratorKind::MultiLevelPointer; |
| 4251 | |
| 4252 | type = ptrType->getPointeeType(); |
| 4253 | ++numTypeSpecifierPointers; |
| 4254 | continue; |
| 4255 | } |
| 4256 | |
| 4257 | // Decompose block pointers. |
| 4258 | if (type->getAs<BlockPointerType>()) { |
| 4259 | return numNormalPointers > 0 ? PointerDeclaratorKind::MultiLevelPointer |
| 4260 | : PointerDeclaratorKind::SingleLevelPointer; |
| 4261 | } |
| 4262 | |
| 4263 | // Decompose member pointers. |
| 4264 | if (type->getAs<MemberPointerType>()) { |
| 4265 | return numNormalPointers > 0 ? PointerDeclaratorKind::MultiLevelPointer |
| 4266 | : PointerDeclaratorKind::SingleLevelPointer; |
| 4267 | } |
| 4268 | |
| 4269 | // Look at Objective-C object pointers. |
| 4270 | if (auto objcObjectPtr = type->getAs<ObjCObjectPointerType>()) { |
| 4271 | ++numNormalPointers; |
| 4272 | ++numTypeSpecifierPointers; |
| 4273 | |
| 4274 | // If this is NSError**, report that. |
| 4275 | if (auto objcClassDecl = objcObjectPtr->getInterfaceDecl()) { |
| 4276 | if (objcClassDecl->getIdentifier() == S.getNSErrorIdent() && |
| 4277 | numNormalPointers == 2 && numTypeSpecifierPointers < 2) { |
| 4278 | return PointerDeclaratorKind::NSErrorPointerPointer; |
| 4279 | } |
| 4280 | } |
| 4281 | |
| 4282 | break; |
| 4283 | } |
| 4284 | |
| 4285 | // Look at Objective-C class types. |
| 4286 | if (auto objcClass = type->getAs<ObjCInterfaceType>()) { |
| 4287 | if (objcClass->getInterface()->getIdentifier() == S.getNSErrorIdent()) { |
| 4288 | if (numNormalPointers == 2 && numTypeSpecifierPointers < 2) |
| 4289 | return PointerDeclaratorKind::NSErrorPointerPointer; |
| 4290 | } |
| 4291 | |
| 4292 | break; |
| 4293 | } |
| 4294 | |
| 4295 | // If at this point we haven't seen a pointer, we won't see one. |
| 4296 | if (numNormalPointers == 0) |
| 4297 | return PointerDeclaratorKind::NonPointer; |
| 4298 | |
| 4299 | if (auto recordType = type->getAs<RecordType>()) { |
| 4300 | RecordDecl *recordDecl = recordType->getDecl(); |
| 4301 | |
| 4302 | // If this is CFErrorRef*, report it as such. |
| 4303 | if (numNormalPointers == 2 && numTypeSpecifierPointers < 2 && |
| 4304 | S.isCFError(recordDecl)) { |
| 4305 | return PointerDeclaratorKind::CFErrorRefPointer; |
| 4306 | } |
| 4307 | break; |
| 4308 | } |
| 4309 | |
| 4310 | break; |
| 4311 | } while (true); |
| 4312 | |
| 4313 | switch (numNormalPointers) { |
| 4314 | case 0: |
| 4315 | return PointerDeclaratorKind::NonPointer; |
| 4316 | |
| 4317 | case 1: |
| 4318 | return PointerDeclaratorKind::SingleLevelPointer; |
| 4319 | |
| 4320 | case 2: |
| 4321 | return PointerDeclaratorKind::MaybePointerToCFRef; |
| 4322 | |
| 4323 | default: |
| 4324 | return PointerDeclaratorKind::MultiLevelPointer; |
| 4325 | } |
| 4326 | } |
| 4327 | |
| 4328 | bool Sema::isCFError(RecordDecl *RD) { |
| 4329 | // If we already know about CFError, test it directly. |
| 4330 | if (CFError) |
| 4331 | return CFError == RD; |
| 4332 | |
| 4333 | // Check whether this is CFError, which we identify based on its bridge to |
| 4334 | // NSError. CFErrorRef used to be declared with "objc_bridge" but is now |
| 4335 | // declared with "objc_bridge_mutable", so look for either one of the two |
| 4336 | // attributes. |
| 4337 | if (RD->getTagKind() == TTK_Struct) { |
| 4338 | IdentifierInfo *bridgedType = nullptr; |
| 4339 | if (auto bridgeAttr = RD->getAttr<ObjCBridgeAttr>()) |
| 4340 | bridgedType = bridgeAttr->getBridgedType(); |
| 4341 | else if (auto bridgeAttr = RD->getAttr<ObjCBridgeMutableAttr>()) |
| 4342 | bridgedType = bridgeAttr->getBridgedType(); |
| 4343 | |
| 4344 | if (bridgedType == getNSErrorIdent()) { |
| 4345 | CFError = RD; |
| 4346 | return true; |
| 4347 | } |
| 4348 | } |
| 4349 | |
| 4350 | return false; |
| 4351 | } |
| 4352 | |
| 4353 | static FileID getNullabilityCompletenessCheckFileID(Sema &S, |
| 4354 | SourceLocation loc) { |
| 4355 | // If we're anywhere in a function, method, or closure context, don't perform |
| 4356 | // completeness checks. |
| 4357 | for (DeclContext *ctx = S.CurContext; ctx; ctx = ctx->getParent()) { |
| 4358 | if (ctx->isFunctionOrMethod()) |
| 4359 | return FileID(); |
| 4360 | |
| 4361 | if (ctx->isFileContext()) |
| 4362 | break; |
| 4363 | } |
| 4364 | |
| 4365 | // We only care about the expansion location. |
| 4366 | loc = S.SourceMgr.getExpansionLoc(loc); |
| 4367 | FileID file = S.SourceMgr.getFileID(loc); |
| 4368 | if (file.isInvalid()) |
| 4369 | return FileID(); |
| 4370 | |
| 4371 | // Retrieve file information. |
| 4372 | bool invalid = false; |
| 4373 | const SrcMgr::SLocEntry &sloc = S.SourceMgr.getSLocEntry(file, &invalid); |
| 4374 | if (invalid || !sloc.isFile()) |
| 4375 | return FileID(); |
| 4376 | |
| 4377 | // We don't want to perform completeness checks on the main file or in |
| 4378 | // system headers. |
| 4379 | const SrcMgr::FileInfo &fileInfo = sloc.getFile(); |
| 4380 | if (fileInfo.getIncludeLoc().isInvalid()) |
| 4381 | return FileID(); |
| 4382 | if (fileInfo.getFileCharacteristic() != SrcMgr::C_User && |
| 4383 | S.Diags.getSuppressSystemWarnings()) { |
| 4384 | return FileID(); |
| 4385 | } |
| 4386 | |
| 4387 | return file; |
| 4388 | } |
| 4389 | |
| 4390 | /// Creates a fix-it to insert a C-style nullability keyword at \p pointerLoc, |
| 4391 | /// taking into account whitespace before and after. |
| 4392 | template <typename DiagBuilderT> |
| 4393 | static void fixItNullability(Sema &S, DiagBuilderT &Diag, |
| 4394 | SourceLocation PointerLoc, |
| 4395 | NullabilityKind Nullability) { |
| 4396 | assert(PointerLoc.isValid())(static_cast <bool> (PointerLoc.isValid()) ? void (0) : __assert_fail ("PointerLoc.isValid()", "clang/lib/Sema/SemaType.cpp" , 4396, __extension__ __PRETTY_FUNCTION__)); |
| 4397 | if (PointerLoc.isMacroID()) |
| 4398 | return; |
| 4399 | |
| 4400 | SourceLocation FixItLoc = S.getLocForEndOfToken(PointerLoc); |
| 4401 | if (!FixItLoc.isValid() || FixItLoc == PointerLoc) |
| 4402 | return; |
| 4403 | |
| 4404 | const char *NextChar = S.SourceMgr.getCharacterData(FixItLoc); |
| 4405 | if (!NextChar) |
| 4406 | return; |
| 4407 | |
| 4408 | SmallString<32> InsertionTextBuf{" "}; |
| 4409 | InsertionTextBuf += getNullabilitySpelling(Nullability); |
| 4410 | InsertionTextBuf += " "; |
| 4411 | StringRef InsertionText = InsertionTextBuf.str(); |
| 4412 | |
| 4413 | if (isWhitespace(*NextChar)) { |
| 4414 | InsertionText = InsertionText.drop_back(); |
| 4415 | } else if (NextChar[-1] == '[') { |
| 4416 | if (NextChar[0] == ']') |
| 4417 | InsertionText = InsertionText.drop_back().drop_front(); |
| 4418 | else |
| 4419 | InsertionText = InsertionText.drop_front(); |
| 4420 | } else if (!isAsciiIdentifierContinue(NextChar[0], /*allow dollar*/ true) && |
| 4421 | !isAsciiIdentifierContinue(NextChar[-1], /*allow dollar*/ true)) { |
| 4422 | InsertionText = InsertionText.drop_back().drop_front(); |
| 4423 | } |
| 4424 | |
| 4425 | Diag << FixItHint::CreateInsertion(FixItLoc, InsertionText); |
| 4426 | } |
| 4427 | |
| 4428 | static void emitNullabilityConsistencyWarning(Sema &S, |
| 4429 | SimplePointerKind PointerKind, |
| 4430 | SourceLocation PointerLoc, |
| 4431 | SourceLocation PointerEndLoc) { |
| 4432 | assert(PointerLoc.isValid())(static_cast <bool> (PointerLoc.isValid()) ? void (0) : __assert_fail ("PointerLoc.isValid()", "clang/lib/Sema/SemaType.cpp" , 4432, __extension__ __PRETTY_FUNCTION__)); |
| 4433 | |
| 4434 | if (PointerKind == SimplePointerKind::Array) { |
| 4435 | S.Diag(PointerLoc, diag::warn_nullability_missing_array); |
| 4436 | } else { |
| 4437 | S.Diag(PointerLoc, diag::warn_nullability_missing) |
| 4438 | << static_cast<unsigned>(PointerKind); |
| 4439 | } |
| 4440 | |
| 4441 | auto FixItLoc = PointerEndLoc.isValid() ? PointerEndLoc : PointerLoc; |
| 4442 | if (FixItLoc.isMacroID()) |
| 4443 | return; |
| 4444 | |
| 4445 | auto addFixIt = [&](NullabilityKind Nullability) { |
| 4446 | auto Diag = S.Diag(FixItLoc, diag::note_nullability_fix_it); |
| 4447 | Diag << static_cast<unsigned>(Nullability); |
| 4448 | Diag << static_cast<unsigned>(PointerKind); |
| 4449 | fixItNullability(S, Diag, FixItLoc, Nullability); |
| 4450 | }; |
| 4451 | addFixIt(NullabilityKind::Nullable); |
| 4452 | addFixIt(NullabilityKind::NonNull); |
| 4453 | } |
| 4454 | |
| 4455 | /// Complains about missing nullability if the file containing \p pointerLoc |
| 4456 | /// has other uses of nullability (either the keywords or the \c assume_nonnull |
| 4457 | /// pragma). |
| 4458 | /// |
| 4459 | /// If the file has \e not seen other uses of nullability, this particular |
| 4460 | /// pointer is saved for possible later diagnosis. See recordNullabilitySeen(). |
| 4461 | static void |
| 4462 | checkNullabilityConsistency(Sema &S, SimplePointerKind pointerKind, |
| 4463 | SourceLocation pointerLoc, |
| 4464 | SourceLocation pointerEndLoc = SourceLocation()) { |
| 4465 | // Determine which file we're performing consistency checking for. |
| 4466 | FileID file = getNullabilityCompletenessCheckFileID(S, pointerLoc); |
| 4467 | if (file.isInvalid()) |
| 4468 | return; |
| 4469 | |
| 4470 | // If we haven't seen any type nullability in this file, we won't warn now |
| 4471 | // about anything. |
| 4472 | FileNullability &fileNullability = S.NullabilityMap[file]; |
| 4473 | if (!fileNullability.SawTypeNullability) { |
| 4474 | // If this is the first pointer declarator in the file, and the appropriate |
| 4475 | // warning is on, record it in case we need to diagnose it retroactively. |
| 4476 | diag::kind diagKind; |
| 4477 | if (pointerKind == SimplePointerKind::Array) |
| 4478 | diagKind = diag::warn_nullability_missing_array; |
| 4479 | else |
| 4480 | diagKind = diag::warn_nullability_missing; |
| 4481 | |
| 4482 | if (fileNullability.PointerLoc.isInvalid() && |
| 4483 | !S.Context.getDiagnostics().isIgnored(diagKind, pointerLoc)) { |
| 4484 | fileNullability.PointerLoc = pointerLoc; |
| 4485 | fileNullability.PointerEndLoc = pointerEndLoc; |
| 4486 | fileNullability.PointerKind = static_cast<unsigned>(pointerKind); |
| 4487 | } |
| 4488 | |
| 4489 | return; |
| 4490 | } |
| 4491 | |
| 4492 | // Complain about missing nullability. |
| 4493 | emitNullabilityConsistencyWarning(S, pointerKind, pointerLoc, pointerEndLoc); |
| 4494 | } |
| 4495 | |
| 4496 | /// Marks that a nullability feature has been used in the file containing |
| 4497 | /// \p loc. |
| 4498 | /// |
| 4499 | /// If this file already had pointer types in it that were missing nullability, |
| 4500 | /// the first such instance is retroactively diagnosed. |
| 4501 | /// |
| 4502 | /// \sa checkNullabilityConsistency |
| 4503 | static void recordNullabilitySeen(Sema &S, SourceLocation loc) { |
| 4504 | FileID file = getNullabilityCompletenessCheckFileID(S, loc); |
| 4505 | if (file.isInvalid()) |
| 4506 | return; |
| 4507 | |
| 4508 | FileNullability &fileNullability = S.NullabilityMap[file]; |
| 4509 | if (fileNullability.SawTypeNullability) |
| 4510 | return; |
| 4511 | fileNullability.SawTypeNullability = true; |
| 4512 | |
| 4513 | // If we haven't seen any type nullability before, now we have. Retroactively |
| 4514 | // diagnose the first unannotated pointer, if there was one. |
| 4515 | if (fileNullability.PointerLoc.isInvalid()) |
| 4516 | return; |
| 4517 | |
| 4518 | auto kind = static_cast<SimplePointerKind>(fileNullability.PointerKind); |
| 4519 | emitNullabilityConsistencyWarning(S, kind, fileNullability.PointerLoc, |
| 4520 | fileNullability.PointerEndLoc); |
| 4521 | } |
| 4522 | |
| 4523 | /// Returns true if any of the declarator chunks before \p endIndex include a |
| 4524 | /// level of indirection: array, pointer, reference, or pointer-to-member. |
| 4525 | /// |
| 4526 | /// Because declarator chunks are stored in outer-to-inner order, testing |
| 4527 | /// every chunk before \p endIndex is testing all chunks that embed the current |
| 4528 | /// chunk as part of their type. |
| 4529 | /// |
| 4530 | /// It is legal to pass the result of Declarator::getNumTypeObjects() as the |
| 4531 | /// end index, in which case all chunks are tested. |
| 4532 | static bool hasOuterPointerLikeChunk(const Declarator &D, unsigned endIndex) { |
| 4533 | unsigned i = endIndex; |
| 4534 | while (i != 0) { |
| 4535 | // Walk outwards along the declarator chunks. |
| 4536 | --i; |
| 4537 | const DeclaratorChunk &DC = D.getTypeObject(i); |
| 4538 | switch (DC.Kind) { |
| 4539 | case DeclaratorChunk::Paren: |
| 4540 | break; |
| 4541 | case DeclaratorChunk::Array: |
| 4542 | case DeclaratorChunk::Pointer: |
| 4543 | case DeclaratorChunk::Reference: |
| 4544 | case DeclaratorChunk::MemberPointer: |
| 4545 | return true; |
| 4546 | case DeclaratorChunk::Function: |
| 4547 | case DeclaratorChunk::BlockPointer: |
| 4548 | case DeclaratorChunk::Pipe: |
| 4549 | // These are invalid anyway, so just ignore. |
| 4550 | break; |
| 4551 | } |
| 4552 | } |
| 4553 | return false; |
| 4554 | } |
| 4555 | |
| 4556 | static bool IsNoDerefableChunk(DeclaratorChunk Chunk) { |
| 4557 | return (Chunk.Kind == DeclaratorChunk::Pointer || |
| 4558 | Chunk.Kind == DeclaratorChunk::Array); |
| 4559 | } |
| 4560 | |
| 4561 | template<typename AttrT> |
| 4562 | static AttrT *createSimpleAttr(ASTContext &Ctx, ParsedAttr &AL) { |
| 4563 | AL.setUsedAsTypeAttr(); |
| 4564 | return ::new (Ctx) AttrT(Ctx, AL); |
| 4565 | } |
| 4566 | |
| 4567 | static Attr *createNullabilityAttr(ASTContext &Ctx, ParsedAttr &Attr, |
| 4568 | NullabilityKind NK) { |
| 4569 | switch (NK) { |
| 4570 | case NullabilityKind::NonNull: |
| 4571 | return createSimpleAttr<TypeNonNullAttr>(Ctx, Attr); |
| 4572 | |
| 4573 | case NullabilityKind::Nullable: |
| 4574 | return createSimpleAttr<TypeNullableAttr>(Ctx, Attr); |
| 4575 | |
| 4576 | case NullabilityKind::NullableResult: |
| 4577 | return createSimpleAttr<TypeNullableResultAttr>(Ctx, Attr); |
| 4578 | |
| 4579 | case NullabilityKind::Unspecified: |
| 4580 | return createSimpleAttr<TypeNullUnspecifiedAttr>(Ctx, Attr); |
| 4581 | } |
| 4582 | llvm_unreachable("unknown NullabilityKind")::llvm::llvm_unreachable_internal("unknown NullabilityKind", "clang/lib/Sema/SemaType.cpp" , 4582); |
| 4583 | } |
| 4584 | |
| 4585 | // Diagnose whether this is a case with the multiple addr spaces. |
| 4586 | // Returns true if this is an invalid case. |
| 4587 | // ISO/IEC TR 18037 S5.3 (amending C99 6.7.3): "No type shall be qualified |
| 4588 | // by qualifiers for two or more different address spaces." |
| 4589 | static bool DiagnoseMultipleAddrSpaceAttributes(Sema &S, LangAS ASOld, |
| 4590 | LangAS ASNew, |
| 4591 | SourceLocation AttrLoc) { |
| 4592 | if (ASOld != LangAS::Default) { |
| 4593 | if (ASOld != ASNew) { |
| 4594 | S.Diag(AttrLoc, diag::err_attribute_address_multiple_qualifiers); |
| 4595 | return true; |
| 4596 | } |
| 4597 | // Emit a warning if they are identical; it's likely unintended. |
| 4598 | S.Diag(AttrLoc, |
| 4599 | diag::warn_attribute_address_multiple_identical_qualifiers); |
| 4600 | } |
| 4601 | return false; |
| 4602 | } |
| 4603 | |
| 4604 | static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state, |
| 4605 | QualType declSpecType, |
| 4606 | TypeSourceInfo *TInfo) { |
| 4607 | // The TypeSourceInfo that this function returns will not be a null type. |
| 4608 | // If there is an error, this function will fill in a dummy type as fallback. |
| 4609 | QualType T = declSpecType; |
| 4610 | Declarator &D = state.getDeclarator(); |
| 4611 | Sema &S = state.getSema(); |
| 4612 | ASTContext &Context = S.Context; |
| 4613 | const LangOptions &LangOpts = S.getLangOpts(); |
| 4614 | |
| 4615 | // The name we're declaring, if any. |
| 4616 | DeclarationName Name; |
| 4617 | if (D.getIdentifier()) |
| 4618 | Name = D.getIdentifier(); |
| 4619 | |
| 4620 | // Does this declaration declare a typedef-name? |
| 4621 | bool IsTypedefName = |
| 4622 | D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef || |
| 4623 | D.getContext() == DeclaratorContext::AliasDecl || |
| 4624 | D.getContext() == DeclaratorContext::AliasTemplate; |
| 4625 | |
| 4626 | // Does T refer to a function type with a cv-qualifier or a ref-qualifier? |
| 4627 | bool IsQualifiedFunction = T->isFunctionProtoType() && |
| 4628 | (!T->castAs<FunctionProtoType>()->getMethodQuals().empty() || |
| 4629 | T->castAs<FunctionProtoType>()->getRefQualifier() != RQ_None); |
| 4630 | |
| 4631 | // If T is 'decltype(auto)', the only declarators we can have are parens |
| 4632 | // and at most one function declarator if this is a function declaration. |
| 4633 | // If T is a deduced class template specialization type, we can have no |
| 4634 | // declarator chunks at all. |
| 4635 | if (auto *DT = T->getAs<DeducedType>()) { |
| 4636 | const AutoType *AT = T->getAs<AutoType>(); |
| 4637 | bool IsClassTemplateDeduction = isa<DeducedTemplateSpecializationType>(DT); |
| 4638 | if ((AT && AT->isDecltypeAuto()) || IsClassTemplateDeduction) { |
| 4639 | for (unsigned I = 0, E = D.getNumTypeObjects(); I != E; ++I) { |
| 4640 | unsigned Index = E - I - 1; |
| 4641 | DeclaratorChunk &DeclChunk = D.getTypeObject(Index); |
| 4642 | unsigned DiagId = IsClassTemplateDeduction |
| 4643 | ? diag::err_deduced_class_template_compound_type |
| 4644 | : diag::err_decltype_auto_compound_type; |
| 4645 | unsigned DiagKind = 0; |
| 4646 | switch (DeclChunk.Kind) { |
| 4647 | case DeclaratorChunk::Paren: |
| 4648 | // FIXME: Rejecting this is a little silly. |
| 4649 | if (IsClassTemplateDeduction) { |
| 4650 | DiagKind = 4; |
| 4651 | break; |
| 4652 | } |
| 4653 | continue; |
| 4654 | case DeclaratorChunk::Function: { |
| 4655 | if (IsClassTemplateDeduction) { |
| 4656 | DiagKind = 3; |
| 4657 | break; |
| 4658 | } |
| 4659 | unsigned FnIndex; |
| 4660 | if (D.isFunctionDeclarationContext() && |
| 4661 | D.isFunctionDeclarator(FnIndex) && FnIndex == Index) |
| 4662 | continue; |
| 4663 | DiagId = diag::err_decltype_auto_function_declarator_not_declaration; |
| 4664 | break; |
| 4665 | } |
| 4666 | case DeclaratorChunk::Pointer: |
| 4667 | case DeclaratorChunk::BlockPointer: |
| 4668 | case DeclaratorChunk::MemberPointer: |
| 4669 | DiagKind = 0; |
| 4670 | break; |
| 4671 | case DeclaratorChunk::Reference: |
| 4672 | DiagKind = 1; |
| 4673 | break; |
| 4674 | case DeclaratorChunk::Array: |
| 4675 | DiagKind = 2; |
| 4676 | break; |
| 4677 | case DeclaratorChunk::Pipe: |
| 4678 | break; |
| 4679 | } |
| 4680 | |
| 4681 | S.Diag(DeclChunk.Loc, DiagId) << DiagKind; |
| 4682 | D.setInvalidType(true); |
| 4683 | break; |
| 4684 | } |
| 4685 | } |
| 4686 | } |
| 4687 | |
| 4688 | // Determine whether we should infer _Nonnull on pointer types. |
| 4689 | std::optional<NullabilityKind> inferNullability; |
| 4690 | bool inferNullabilityCS = false; |
| 4691 | bool inferNullabilityInnerOnly = false; |
| 4692 | bool inferNullabilityInnerOnlyComplete = false; |
| 4693 | |
| 4694 | // Are we in an assume-nonnull region? |
| 4695 | bool inAssumeNonNullRegion = false; |
| 4696 | SourceLocation assumeNonNullLoc = S.PP.getPragmaAssumeNonNullLoc(); |
| 4697 | if (assumeNonNullLoc.isValid()) { |
| 4698 | inAssumeNonNullRegion = true; |
| 4699 | recordNullabilitySeen(S, assumeNonNullLoc); |
| 4700 | } |
| 4701 | |
| 4702 | // Whether to complain about missing nullability specifiers or not. |
| 4703 | enum { |
| 4704 | /// Never complain. |
| 4705 | CAMN_No, |
| 4706 | /// Complain on the inner pointers (but not the outermost |
| 4707 | /// pointer). |
| 4708 | CAMN_InnerPointers, |
| 4709 | /// Complain about any pointers that don't have nullability |
| 4710 | /// specified or inferred. |
| 4711 | CAMN_Yes |
| 4712 | } complainAboutMissingNullability = CAMN_No; |
| 4713 | unsigned NumPointersRemaining = 0; |
| 4714 | auto complainAboutInferringWithinChunk = PointerWrappingDeclaratorKind::None; |
| 4715 | |
| 4716 | if (IsTypedefName) { |
| 4717 | // For typedefs, we do not infer any nullability (the default), |
| 4718 | // and we only complain about missing nullability specifiers on |
| 4719 | // inner pointers. |
| 4720 | complainAboutMissingNullability = CAMN_InnerPointers; |
| 4721 | |
| 4722 | if (T->canHaveNullability(/*ResultIfUnknown*/ false) && |
| 4723 | !T->getNullability()) { |
| 4724 | // Note that we allow but don't require nullability on dependent types. |
| 4725 | ++NumPointersRemaining; |
| 4726 | } |
| 4727 | |
| 4728 | for (unsigned i = 0, n = D.getNumTypeObjects(); i != n; ++i) { |
| 4729 | DeclaratorChunk &chunk = D.getTypeObject(i); |
| 4730 | switch (chunk.Kind) { |
| 4731 | case DeclaratorChunk::Array: |
| 4732 | case DeclaratorChunk::Function: |
| 4733 | case DeclaratorChunk::Pipe: |
| 4734 | break; |
| 4735 | |
| 4736 | case DeclaratorChunk::BlockPointer: |
| 4737 | case DeclaratorChunk::MemberPointer: |
| 4738 | ++NumPointersRemaining; |
| 4739 | break; |
| 4740 | |
| 4741 | case DeclaratorChunk::Paren: |
| 4742 | case DeclaratorChunk::Reference: |
| 4743 | continue; |
| 4744 | |
| 4745 | case DeclaratorChunk::Pointer: |
| 4746 | ++NumPointersRemaining; |
| 4747 | continue; |
| 4748 | } |
| 4749 | } |
| 4750 | } else { |
| 4751 | bool isFunctionOrMethod = false; |
| 4752 | switch (auto context = state.getDeclarator().getContext()) { |
| 4753 | case DeclaratorContext::ObjCParameter: |
| 4754 | case DeclaratorContext::ObjCResult: |
| 4755 | case DeclaratorContext::Prototype: |
| 4756 | case DeclaratorContext::TrailingReturn: |
| 4757 | case DeclaratorContext::TrailingReturnVar: |
| 4758 | isFunctionOrMethod = true; |
| 4759 | [[fallthrough]]; |
| 4760 | |
| 4761 | case DeclaratorContext::Member: |
| 4762 | if (state.getDeclarator().isObjCIvar() && !isFunctionOrMethod) { |
| 4763 | complainAboutMissingNullability = CAMN_No; |
| 4764 | break; |
| 4765 | } |
| 4766 | |
| 4767 | // Weak properties are inferred to be nullable. |
| 4768 | if (state.getDeclarator().isObjCWeakProperty()) { |
| 4769 | // Weak properties cannot be nonnull, and should not complain about |
| 4770 | // missing nullable attributes during completeness checks. |
| 4771 | complainAboutMissingNullability = CAMN_No; |
| 4772 | if (inAssumeNonNullRegion) { |
| 4773 | inferNullability = NullabilityKind::Nullable; |
| 4774 | } |
| 4775 | break; |
| 4776 | } |
| 4777 | |
| 4778 | [[fallthrough]]; |
| 4779 | |
| 4780 | case DeclaratorContext::File: |
| 4781 | case DeclaratorContext::KNRTypeList: { |
| 4782 | complainAboutMissingNullability = CAMN_Yes; |
| 4783 | |
| 4784 | // Nullability inference depends on the type and declarator. |
| 4785 | auto wrappingKind = PointerWrappingDeclaratorKind::None; |
| 4786 | switch (classifyPointerDeclarator(S, T, D, wrappingKind)) { |
| 4787 | case PointerDeclaratorKind::NonPointer: |
| 4788 | case PointerDeclaratorKind::MultiLevelPointer: |
| 4789 | // Cannot infer nullability. |
| 4790 | break; |
| 4791 | |
| 4792 | case PointerDeclaratorKind::SingleLevelPointer: |
| 4793 | // Infer _Nonnull if we are in an assumes-nonnull region. |
| 4794 | if (inAssumeNonNullRegion) { |
| 4795 | complainAboutInferringWithinChunk = wrappingKind; |
| 4796 | inferNullability = NullabilityKind::NonNull; |
| 4797 | inferNullabilityCS = (context == DeclaratorContext::ObjCParameter || |
| 4798 | context == DeclaratorContext::ObjCResult); |
| 4799 | } |
| 4800 | break; |
| 4801 | |
| 4802 | case PointerDeclaratorKind::CFErrorRefPointer: |
| 4803 | case PointerDeclaratorKind::NSErrorPointerPointer: |
| 4804 | // Within a function or method signature, infer _Nullable at both |
| 4805 | // levels. |
| 4806 | if (isFunctionOrMethod && inAssumeNonNullRegion) |
| 4807 | inferNullability = NullabilityKind::Nullable; |
| 4808 | break; |
| 4809 | |
| 4810 | case PointerDeclaratorKind::MaybePointerToCFRef: |
| 4811 | if (isFunctionOrMethod) { |
| 4812 | // On pointer-to-pointer parameters marked cf_returns_retained or |
| 4813 | // cf_returns_not_retained, if the outer pointer is explicit then |
| 4814 | // infer the inner pointer as _Nullable. |
| 4815 | auto hasCFReturnsAttr = |
| 4816 | [](const ParsedAttributesView &AttrList) -> bool { |
| 4817 | return AttrList.hasAttribute(ParsedAttr::AT_CFReturnsRetained) || |
| 4818 | AttrList.hasAttribute(ParsedAttr::AT_CFReturnsNotRetained); |
| 4819 | }; |
| 4820 | if (const auto *InnermostChunk = D.getInnermostNonParenChunk()) { |
| 4821 | if (hasCFReturnsAttr(D.getDeclarationAttributes()) || |
| 4822 | hasCFReturnsAttr(D.getAttributes()) || |
| 4823 | hasCFReturnsAttr(InnermostChunk->getAttrs()) || |
| 4824 | hasCFReturnsAttr(D.getDeclSpec().getAttributes())) { |
| 4825 | inferNullability = NullabilityKind::Nullable; |
| 4826 | inferNullabilityInnerOnly = true; |
| 4827 | } |
| 4828 | } |
| 4829 | } |
| 4830 | break; |
| 4831 | } |
| 4832 | break; |
| 4833 | } |
| 4834 | |
| 4835 | case DeclaratorContext::ConversionId: |
| 4836 | complainAboutMissingNullability = CAMN_Yes; |
| 4837 | break; |
| 4838 | |
| 4839 | case DeclaratorContext::AliasDecl: |
| 4840 | case DeclaratorContext::AliasTemplate: |
| 4841 | case DeclaratorContext::Block: |
| 4842 | case DeclaratorContext::BlockLiteral: |
| 4843 | case DeclaratorContext::Condition: |
| 4844 | case DeclaratorContext::CXXCatch: |
| 4845 | case DeclaratorContext::CXXNew: |
| 4846 | case DeclaratorContext::ForInit: |
| 4847 | case DeclaratorContext::SelectionInit: |
| 4848 | case DeclaratorContext::LambdaExpr: |
| 4849 | case DeclaratorContext::LambdaExprParameter: |
| 4850 | case DeclaratorContext::ObjCCatch: |
| 4851 | case DeclaratorContext::TemplateParam: |
| 4852 | case DeclaratorContext::TemplateArg: |
| 4853 | case DeclaratorContext::TemplateTypeArg: |
| 4854 | case DeclaratorContext::TypeName: |
| 4855 | case DeclaratorContext::FunctionalCast: |
| 4856 | case DeclaratorContext::RequiresExpr: |
| 4857 | case DeclaratorContext::Association: |
| 4858 | // Don't infer in these contexts. |
| 4859 | break; |
| 4860 | } |
| 4861 | } |
| 4862 | |
| 4863 | // Local function that returns true if its argument looks like a va_list. |
| 4864 | auto isVaList = [&S](QualType T) -> bool { |
| 4865 | auto *typedefTy = T->getAs<TypedefType>(); |
| 4866 | if (!typedefTy) |
| 4867 | return false; |
| 4868 | TypedefDecl *vaListTypedef = S.Context.getBuiltinVaListDecl(); |
| 4869 | do { |
| 4870 | if (typedefTy->getDecl() == vaListTypedef) |
| 4871 | return true; |
| 4872 | if (auto *name = typedefTy->getDecl()->getIdentifier()) |
| 4873 | if (name->isStr("va_list")) |
| 4874 | return true; |
| 4875 | typedefTy = typedefTy->desugar()->getAs<TypedefType>(); |
| 4876 | } while (typedefTy); |
| 4877 | return false; |
| 4878 | }; |
| 4879 | |
| 4880 | // Local function that checks the nullability for a given pointer declarator. |
| 4881 | // Returns true if _Nonnull was inferred. |
| 4882 | auto inferPointerNullability = |
| 4883 | [&](SimplePointerKind pointerKind, SourceLocation pointerLoc, |
| 4884 | SourceLocation pointerEndLoc, |
| 4885 | ParsedAttributesView &attrs, AttributePool &Pool) -> ParsedAttr * { |
| 4886 | // We've seen a pointer. |
| 4887 | if (NumPointersRemaining > 0) |
| 4888 | --NumPointersRemaining; |
| 4889 | |
| 4890 | // If a nullability attribute is present, there's nothing to do. |
| 4891 | if (hasNullabilityAttr(attrs)) |
| 4892 | return nullptr; |
| 4893 | |
| 4894 | // If we're supposed to infer nullability, do so now. |
| 4895 | if (inferNullability && !inferNullabilityInnerOnlyComplete) { |
| 4896 | ParsedAttr::Syntax syntax = inferNullabilityCS |
| 4897 | ? ParsedAttr::AS_ContextSensitiveKeyword |
| 4898 | : ParsedAttr::AS_Keyword; |
| 4899 | ParsedAttr *nullabilityAttr = Pool.create( |
| 4900 | S.getNullabilityKeyword(*inferNullability), SourceRange(pointerLoc), |
| 4901 | nullptr, SourceLocation(), nullptr, 0, syntax); |
| 4902 | |
| 4903 | attrs.addAtEnd(nullabilityAttr); |
| 4904 | |
| 4905 | if (inferNullabilityCS) { |
| 4906 | state.getDeclarator().getMutableDeclSpec().getObjCQualifiers() |
| 4907 | ->setObjCDeclQualifier(ObjCDeclSpec::DQ_CSNullability); |
| 4908 | } |
| 4909 | |
| 4910 | if (pointerLoc.isValid() && |
| 4911 | complainAboutInferringWithinChunk != |
| 4912 | PointerWrappingDeclaratorKind::None) { |
| 4913 | auto Diag = |
| 4914 | S.Diag(pointerLoc, diag::warn_nullability_inferred_on_nested_type); |
| 4915 | Diag << static_cast<int>(complainAboutInferringWithinChunk); |
| 4916 | fixItNullability(S, Diag, pointerLoc, NullabilityKind::NonNull); |
| 4917 | } |
| 4918 | |
| 4919 | if (inferNullabilityInnerOnly) |
| 4920 | inferNullabilityInnerOnlyComplete = true; |
| 4921 | return nullabilityAttr; |
| 4922 | } |
| 4923 | |
| 4924 | // If we're supposed to complain about missing nullability, do so |
| 4925 | // now if it's truly missing. |
| 4926 | switch (complainAboutMissingNullability) { |
| 4927 | case CAMN_No: |
| 4928 | break; |
| 4929 | |
| 4930 | case CAMN_InnerPointers: |
| 4931 | if (NumPointersRemaining == 0) |
| 4932 | break; |
| 4933 | [[fallthrough]]; |
| 4934 | |
| 4935 | case CAMN_Yes: |
| 4936 | checkNullabilityConsistency(S, pointerKind, pointerLoc, pointerEndLoc); |
| 4937 | } |
| 4938 | return nullptr; |
| 4939 | }; |
| 4940 | |
| 4941 | // If the type itself could have nullability but does not, infer pointer |
| 4942 | // nullability and perform consistency checking. |
| 4943 | if (S.CodeSynthesisContexts.empty()) { |
| 4944 | if (T->canHaveNullability(/*ResultIfUnknown*/ false) && |
| 4945 | !T->getNullability()) { |
| 4946 | if (isVaList(T)) { |
| 4947 | // Record that we've seen a pointer, but do nothing else. |
| 4948 | if (NumPointersRemaining > 0) |
| 4949 | --NumPointersRemaining; |
| 4950 | } else { |
| 4951 | SimplePointerKind pointerKind = SimplePointerKind::Pointer; |
| 4952 | if (T->isBlockPointerType()) |
| 4953 | pointerKind = SimplePointerKind::BlockPointer; |
| 4954 | else if (T->isMemberPointerType()) |
| 4955 | pointerKind = SimplePointerKind::MemberPointer; |
| 4956 | |
| 4957 | if (auto *attr = inferPointerNullability( |
| 4958 | pointerKind, D.getDeclSpec().getTypeSpecTypeLoc(), |
| 4959 | D.getDeclSpec().getEndLoc(), |
| 4960 | D.getMutableDeclSpec().getAttributes(), |
| 4961 | D.getMutableDeclSpec().getAttributePool())) { |
| 4962 | T = state.getAttributedType( |
| 4963 | createNullabilityAttr(Context, *attr, *inferNullability), T, T); |
| 4964 | } |
| 4965 | } |
| 4966 | } |
| 4967 | |
| 4968 | if (complainAboutMissingNullability == CAMN_Yes && T->isArrayType() && |
| 4969 | !T->getNullability() && !isVaList(T) && D.isPrototypeContext() && |
| 4970 | !hasOuterPointerLikeChunk(D, D.getNumTypeObjects())) { |
| 4971 | checkNullabilityConsistency(S, SimplePointerKind::Array, |
| 4972 | D.getDeclSpec().getTypeSpecTypeLoc()); |
| 4973 | } |
| 4974 | } |
| 4975 | |
| 4976 | bool ExpectNoDerefChunk = |
| 4977 | state.getCurrentAttributes().hasAttribute(ParsedAttr::AT_NoDeref); |
| 4978 | |
| 4979 | // Walk the DeclTypeInfo, building the recursive type as we go. |
| 4980 | // DeclTypeInfos are ordered from the identifier out, which is |
| 4981 | // opposite of what we want :). |
| 4982 | for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { |
| 4983 | unsigned chunkIndex = e - i - 1; |
| 4984 | state.setCurrentChunkIndex(chunkIndex); |
| 4985 | DeclaratorChunk &DeclType = D.getTypeObject(chunkIndex); |
| 4986 | IsQualifiedFunction &= DeclType.Kind == DeclaratorChunk::Paren; |
| 4987 | switch (DeclType.Kind) { |
| 4988 | case DeclaratorChunk::Paren: |
| 4989 | if (i == 0) |
| 4990 | warnAboutRedundantParens(S, D, T); |
| 4991 | T = S.BuildParenType(T); |
| 4992 | break; |
| 4993 | case DeclaratorChunk::BlockPointer: |
| 4994 | // If blocks are disabled, emit an error. |
| 4995 | if (!LangOpts.Blocks) |
| 4996 | S.Diag(DeclType.Loc, diag::err_blocks_disable) << LangOpts.OpenCL; |
| 4997 | |
| 4998 | // Handle pointer nullability. |
| 4999 | inferPointerNullability(SimplePointerKind::BlockPointer, DeclType.Loc, |
| 5000 | DeclType.EndLoc, DeclType.getAttrs(), |
| 5001 | state.getDeclarator().getAttributePool()); |
| 5002 | |
| 5003 | T = S.BuildBlockPointerType(T, D.getIdentifierLoc(), Name); |
| 5004 | if (DeclType.Cls.TypeQuals || LangOpts.OpenCL) { |
| 5005 | // OpenCL v2.0, s6.12.5 - Block variable declarations are implicitly |
| 5006 | // qualified with const. |
| 5007 | if (LangOpts.OpenCL) |
| 5008 | DeclType.Cls.TypeQuals |= DeclSpec::TQ_const; |
| 5009 | T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Cls.TypeQuals); |
| 5010 | } |
| 5011 | break; |
| 5012 | case DeclaratorChunk::Pointer: |
| 5013 | // Verify that we're not building a pointer to pointer to function with |
| 5014 | // exception specification. |
| 5015 | if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) { |
| 5016 | S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); |
| 5017 | D.setInvalidType(true); |
| 5018 | // Build the type anyway. |
| 5019 | } |
| 5020 | |
| 5021 | // Handle pointer nullability |
| 5022 | inferPointerNullability(SimplePointerKind::Pointer, DeclType.Loc, |
| 5023 | DeclType.EndLoc, DeclType.getAttrs(), |
| 5024 | state.getDeclarator().getAttributePool()); |
| 5025 | |
| 5026 | if (LangOpts.ObjC && T->getAs<ObjCObjectType>()) { |
| 5027 | T = Context.getObjCObjectPointerType(T); |
| 5028 | if (DeclType.Ptr.TypeQuals) |
| 5029 | T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Ptr.TypeQuals); |
| 5030 | break; |
| 5031 | } |
| 5032 | |
| 5033 | // OpenCL v2.0 s6.9b - Pointer to image/sampler cannot be used. |
| 5034 | // OpenCL v2.0 s6.13.16.1 - Pointer to pipe cannot be used. |
| 5035 | // OpenCL v2.0 s6.12.5 - Pointers to Blocks are not allowed. |
| 5036 | if (LangOpts.OpenCL) { |
| 5037 | if (T->isImageType() || T->isSamplerT() || T->isPipeType() || |
| 5038 | T->isBlockPointerType()) { |
| 5039 | S.Diag(D.getIdentifierLoc(), diag::err_opencl_pointer_to_type) << T; |
| 5040 | D.setInvalidType(true); |
| 5041 | } |
| 5042 | } |
| 5043 | |
| 5044 | T = S.BuildPointerType(T, DeclType.Loc, Name); |
| 5045 | if (DeclType.Ptr.TypeQuals) |
| 5046 | T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Ptr.TypeQuals); |
| 5047 | break; |
| 5048 | case DeclaratorChunk::Reference: { |
| 5049 | // Verify that we're not building a reference to pointer to function with |
| 5050 | // exception specification. |
| 5051 | if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) { |
| 5052 | S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); |
| 5053 | D.setInvalidType(true); |
| 5054 | // Build the type anyway. |
| 5055 | } |
| 5056 | T = S.BuildReferenceType(T, DeclType.Ref.LValueRef, DeclType.Loc, Name); |
| 5057 | |
| 5058 | if (DeclType.Ref.HasRestrict) |
| 5059 | T = S.BuildQualifiedType(T, DeclType.Loc, Qualifiers::Restrict); |
| 5060 | break; |
| 5061 | } |
| 5062 | case DeclaratorChunk::Array: { |
| 5063 | // Verify that we're not building an array of pointers to function with |
| 5064 | // exception specification. |
| 5065 | if (LangOpts.CPlusPlus && S.CheckDistantExceptionSpec(T)) { |
| 5066 | S.Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); |
| 5067 | D.setInvalidType(true); |
| 5068 | // Build the type anyway. |
| 5069 | } |
| 5070 | DeclaratorChunk::ArrayTypeInfo &ATI = DeclType.Arr; |
| 5071 | Expr *ArraySize = static_cast<Expr*>(ATI.NumElts); |
| 5072 | ArrayType::ArraySizeModifier ASM; |
| 5073 | if (ATI.isStar) |
| 5074 | ASM = ArrayType::Star; |
| 5075 | else if (ATI.hasStatic) |
| 5076 | ASM = ArrayType::Static; |
| 5077 | else |
| 5078 | ASM = ArrayType::Normal; |
| 5079 | if (ASM == ArrayType::Star && !D.isPrototypeContext()) { |
| 5080 | // FIXME: This check isn't quite right: it allows star in prototypes |
| 5081 | // for function definitions, and disallows some edge cases detailed |
| 5082 | // in http://gcc.gnu.org/ml/gcc-patches/2009-02/msg00133.html |
| 5083 | S.Diag(DeclType.Loc, diag::err_array_star_outside_prototype); |
| 5084 | ASM = ArrayType::Normal; |
| 5085 | D.setInvalidType(true); |
| 5086 | } |
| 5087 | |
| 5088 | // C99 6.7.5.2p1: The optional type qualifiers and the keyword static |
| 5089 | // shall appear only in a declaration of a function parameter with an |
| 5090 | // array type, ... |
| 5091 | if (ASM == ArrayType::Static || ATI.TypeQuals) { |
| 5092 | if (!(D.isPrototypeContext() || |
| 5093 | D.getContext() == DeclaratorContext::KNRTypeList)) { |
| 5094 | S.Diag(DeclType.Loc, diag::err_array_static_outside_prototype) << |
| 5095 | (ASM == ArrayType::Static ? "'static'" : "type qualifier"); |
| 5096 | // Remove the 'static' and the type qualifiers. |
| 5097 | if (ASM == ArrayType::Static) |
| 5098 | ASM = ArrayType::Normal; |
| 5099 | ATI.TypeQuals = 0; |
| 5100 | D.setInvalidType(true); |
| 5101 | } |
| 5102 | |
| 5103 | // C99 6.7.5.2p1: ... and then only in the outermost array type |
| 5104 | // derivation. |
| 5105 | if (hasOuterPointerLikeChunk(D, chunkIndex)) { |
| 5106 | S.Diag(DeclType.Loc, diag::err_array_static_not_outermost) << |
| 5107 | (ASM == ArrayType::Static ? "'static'" : "type qualifier"); |
| 5108 | if (ASM == ArrayType::Static) |
| 5109 | ASM = ArrayType::Normal; |
| 5110 | ATI.TypeQuals = 0; |
| 5111 | D.setInvalidType(true); |
| 5112 | } |
| 5113 | } |
| 5114 | const AutoType *AT = T->getContainedAutoType(); |
| 5115 | // Allow arrays of auto if we are a generic lambda parameter. |
| 5116 | // i.e. [](auto (&array)[5]) { return array[0]; }; OK |
| 5117 | if (AT && D.getContext() != DeclaratorContext::LambdaExprParameter) { |
| 5118 | // We've already diagnosed this for decltype(auto). |
| 5119 | if (!AT->isDecltypeAuto()) |
| 5120 | S.Diag(DeclType.Loc, diag::err_illegal_decl_array_of_auto) |
| 5121 | << getPrintableNameForEntity(Name) << T; |
| 5122 | T = QualType(); |
| 5123 | break; |
| 5124 | } |
| 5125 | |
| 5126 | // Array parameters can be marked nullable as well, although it's not |
| 5127 | // necessary if they're marked 'static'. |
| 5128 | if (complainAboutMissingNullability == CAMN_Yes && |
| 5129 | !hasNullabilityAttr(DeclType.getAttrs()) && |
| 5130 | ASM != ArrayType::Static && |
| 5131 | D.isPrototypeContext() && |
| 5132 | !hasOuterPointerLikeChunk(D, chunkIndex)) { |
| 5133 | checkNullabilityConsistency(S, SimplePointerKind::Array, DeclType.Loc); |
| 5134 | } |
| 5135 | |
| 5136 | T = S.BuildArrayType(T, ASM, ArraySize, ATI.TypeQuals, |
| 5137 | SourceRange(DeclType.Loc, DeclType.EndLoc), Name); |
| 5138 | break; |
| 5139 | } |
| 5140 | case DeclaratorChunk::Function: { |
| 5141 | // If the function declarator has a prototype (i.e. it is not () and |
| 5142 | // does not have a K&R-style identifier list), then the arguments are part |
| 5143 | // of the type, otherwise the argument list is (). |
| 5144 | DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun; |
| 5145 | IsQualifiedFunction = |
| 5146 | FTI.hasMethodTypeQualifiers() || FTI.hasRefQualifier(); |
| 5147 | |
| 5148 | // Check for auto functions and trailing return type and adjust the |
| 5149 | // return type accordingly. |
| 5150 | if (!D.isInvalidType()) { |
| 5151 | // trailing-return-type is only required if we're declaring a function, |
| 5152 | // and not, for instance, a pointer to a function. |
| 5153 | if (D.getDeclSpec().hasAutoTypeSpec() && |
| 5154 | !FTI.hasTrailingReturnType() && chunkIndex == 0) { |
| 5155 | if (!S.getLangOpts().CPlusPlus14) { |
| 5156 | S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(), |
| 5157 | D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto |
| 5158 | ? diag::err_auto_missing_trailing_return |
| 5159 | : diag::err_deduced_return_type); |
| 5160 | T = Context.IntTy; |
| 5161 | D.setInvalidType(true); |
| 5162 | } else { |
| 5163 | S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(), |
| 5164 | diag::warn_cxx11_compat_deduced_return_type); |
| 5165 | } |
| 5166 | } else if (FTI.hasTrailingReturnType()) { |
| 5167 | // T must be exactly 'auto' at this point. See CWG issue 681. |
| 5168 | if (isa<ParenType>(T)) { |
| 5169 | S.Diag(D.getBeginLoc(), diag::err_trailing_return_in_parens) |
| 5170 | << T << D.getSourceRange(); |
| 5171 | D.setInvalidType(true); |
| 5172 | } else if (D.getName().getKind() == |
| 5173 | UnqualifiedIdKind::IK_DeductionGuideName) { |
| 5174 | if (T != Context.DependentTy) { |
| 5175 | S.Diag(D.getDeclSpec().getBeginLoc(), |
| 5176 | diag::err_deduction_guide_with_complex_decl) |
| 5177 | << D.getSourceRange(); |
| 5178 | D.setInvalidType(true); |
| 5179 | } |
| 5180 | } else if (D.getContext() != DeclaratorContext::LambdaExpr && |
| 5181 | (T.hasQualifiers() || !isa<AutoType>(T) || |
| 5182 | cast<AutoType>(T)->getKeyword() != |
| 5183 | AutoTypeKeyword::Auto || |
| 5184 | cast<AutoType>(T)->isConstrained())) { |
| 5185 | S.Diag(D.getDeclSpec().getTypeSpecTypeLoc(), |
| 5186 | diag::err_trailing_return_without_auto) |
| 5187 | << T << D.getDeclSpec().getSourceRange(); |
| 5188 | D.setInvalidType(true); |
| 5189 | } |
| 5190 | T = S.GetTypeFromParser(FTI.getTrailingReturnType(), &TInfo); |
| 5191 | if (T.isNull()) { |
| 5192 | // An error occurred parsing the trailing return type. |
| 5193 | T = Context.IntTy; |
| 5194 | D.setInvalidType(true); |
| 5195 | } else if (AutoType *Auto = T->getContainedAutoType()) { |
| 5196 | // If the trailing return type contains an `auto`, we may need to |
| 5197 | // invent a template parameter for it, for cases like |
| 5198 | // `auto f() -> C auto` or `[](auto (*p) -> auto) {}`. |
| 5199 | InventedTemplateParameterInfo *InventedParamInfo = nullptr; |
| 5200 | if (D.getContext() == DeclaratorContext::Prototype) |
| 5201 | InventedParamInfo = &S.InventedParameterInfos.back(); |
| 5202 | else if (D.getContext() == DeclaratorContext::LambdaExprParameter) |
| 5203 | InventedParamInfo = S.getCurLambda(); |
| 5204 | if (InventedParamInfo) { |
| 5205 | std::tie(T, TInfo) = InventTemplateParameter( |
| 5206 | state, T, TInfo, Auto, *InventedParamInfo); |
| 5207 | } |
| 5208 | } |
| 5209 | } else { |
| 5210 | // This function type is not the type of the entity being declared, |
| 5211 | // so checking the 'auto' is not the responsibility of this chunk. |
| 5212 | } |
| 5213 | } |
| 5214 | |
| 5215 | // C99 6.7.5.3p1: The return type may not be a function or array type. |
| 5216 | // For conversion functions, we'll diagnose this particular error later. |
| 5217 | if (!D.isInvalidType() && (T->isArrayType() || T->isFunctionType()) && |
| 5218 | (D.getName().getKind() != |
| 5219 | UnqualifiedIdKind::IK_ConversionFunctionId)) { |
| 5220 | unsigned diagID = diag::err_func_returning_array_function; |
| 5221 | // Last processing chunk in block context means this function chunk |
| 5222 | // represents the block. |
| 5223 | if (chunkIndex == 0 && |
| 5224 | D.getContext() == DeclaratorContext::BlockLiteral) |
| 5225 | diagID = diag::err_block_returning_array_function; |
| 5226 | S.Diag(DeclType.Loc, diagID) << T->isFunctionType() << T; |
| 5227 | T = Context.IntTy; |
| 5228 | D.setInvalidType(true); |
| 5229 | } |
| 5230 | |
| 5231 | // Do not allow returning half FP value. |
| 5232 | // FIXME: This really should be in BuildFunctionType. |
| 5233 | if (T->isHalfType()) { |
| 5234 | if (S.getLangOpts().OpenCL) { |
| 5235 | if (!S.getOpenCLOptions().isAvailableOption("cl_khr_fp16", |
| 5236 | S.getLangOpts())) { |
| 5237 | S.Diag(D.getIdentifierLoc(), diag::err_opencl_invalid_return) |
| 5238 | << T << 0 /*pointer hint*/; |
| 5239 | D.setInvalidType(true); |
| 5240 | } |
| 5241 | } else if (!S.getLangOpts().NativeHalfArgsAndReturns && |
| 5242 | !S.Context.getTargetInfo().allowHalfArgsAndReturns()) { |
| 5243 | S.Diag(D.getIdentifierLoc(), |
| 5244 | diag::err_parameters_retval_cannot_have_fp16_type) << 1; |
| 5245 | D.setInvalidType(true); |
| 5246 | } |
| 5247 | } |
| 5248 | |
| 5249 | if (LangOpts.OpenCL) { |
| 5250 | // OpenCL v2.0 s6.12.5 - A block cannot be the return value of a |
| 5251 | // function. |
| 5252 | if (T->isBlockPointerType() || T->isImageType() || T->isSamplerT() || |
| 5253 | T->isPipeType()) { |
| 5254 | S.Diag(D.getIdentifierLoc(), diag::err_opencl_invalid_return) |
| 5255 | << T << 1 /*hint off*/; |
| 5256 | D.setInvalidType(true); |
| 5257 | } |
| 5258 | // OpenCL doesn't support variadic functions and blocks |
| 5259 | // (s6.9.e and s6.12.5 OpenCL v2.0) except for printf. |
| 5260 | // We also allow here any toolchain reserved identifiers. |
| 5261 | if (FTI.isVariadic && |
| 5262 | !S.getOpenCLOptions().isAvailableOption( |
| 5263 | "__cl_clang_variadic_functions", S.getLangOpts()) && |
| 5264 | !(D.getIdentifier() && |
| 5265 | ((D.getIdentifier()->getName() == "printf" && |
| 5266 | LangOpts.getOpenCLCompatibleVersion() >= 120) || |
| 5267 | D.getIdentifier()->getName().startswith("__")))) { |
| 5268 | S.Diag(D.getIdentifierLoc(), diag::err_opencl_variadic_function); |
| 5269 | D.setInvalidType(true); |
| 5270 | } |
| 5271 | } |
| 5272 | |
| 5273 | // Methods cannot return interface types. All ObjC objects are |
| 5274 | // passed by reference. |
| 5275 | if (T->isObjCObjectType()) { |
| 5276 | SourceLocation DiagLoc, FixitLoc; |
| 5277 | if (TInfo) { |
| 5278 | DiagLoc = TInfo->getTypeLoc().getBeginLoc(); |
| 5279 | FixitLoc = S.getLocForEndOfToken(TInfo->getTypeLoc().getEndLoc()); |
| 5280 | } else { |
| 5281 | DiagLoc = D.getDeclSpec().getTypeSpecTypeLoc(); |
| 5282 | FixitLoc = S.getLocForEndOfToken(D.getDeclSpec().getEndLoc()); |
| 5283 | } |
| 5284 | S.Diag(DiagLoc, diag::err_object_cannot_be_passed_returned_by_value) |
| 5285 | << 0 << T |
| 5286 | << FixItHint::CreateInsertion(FixitLoc, "*"); |
| 5287 | |
| 5288 | T = Context.getObjCObjectPointerType(T); |
| 5289 | if (TInfo) { |
| 5290 | TypeLocBuilder TLB; |
| 5291 | TLB.pushFullCopy(TInfo->getTypeLoc()); |
| 5292 | ObjCObjectPointerTypeLoc TLoc = TLB.push<ObjCObjectPointerTypeLoc>(T); |
| 5293 | TLoc.setStarLoc(FixitLoc); |
| 5294 | TInfo = TLB.getTypeSourceInfo(Context, T); |
| 5295 | } |
| 5296 | |
| 5297 | D.setInvalidType(true); |
| 5298 | } |
| 5299 | |
| 5300 | // cv-qualifiers on return types are pointless except when the type is a |
| 5301 | // class type in C++. |
| 5302 | if ((T.getCVRQualifiers() || T->isAtomicType()) && |
| 5303 | !(S.getLangOpts().CPlusPlus && |
| 5304 | (T->isDependentType() || T->isRecordType()))) { |
| 5305 | if (T->isVoidType() && !S.getLangOpts().CPlusPlus && |
| 5306 | D.getFunctionDefinitionKind() == |
| 5307 | FunctionDefinitionKind::Definition) { |
| 5308 | // [6.9.1/3] qualified void return is invalid on a C |
| 5309 | // function definition. Apparently ok on declarations and |
| 5310 | // in C++ though (!) |
| 5311 | S.Diag(DeclType.Loc, diag::err_func_returning_qualified_void) << T; |
| 5312 | } else |
| 5313 | diagnoseRedundantReturnTypeQualifiers(S, T, D, chunkIndex); |
| 5314 | |
| 5315 | // C++2a [dcl.fct]p12: |
| 5316 | // A volatile-qualified return type is deprecated |
| 5317 | if (T.isVolatileQualified() && S.getLangOpts().CPlusPlus20) |
| 5318 | S.Diag(DeclType.Loc, diag::warn_deprecated_volatile_return) << T; |
| 5319 | } |
| 5320 | |
| 5321 | // Objective-C ARC ownership qualifiers are ignored on the function |
| 5322 | // return type (by type canonicalization). Complain if this attribute |
| 5323 | // was written here. |
| 5324 | if (T.getQualifiers().hasObjCLifetime()) { |
| 5325 | SourceLocation AttrLoc; |
| 5326 | if (chunkIndex + 1 < D.getNumTypeObjects()) { |
| 5327 | DeclaratorChunk ReturnTypeChunk = D.getTypeObject(chunkIndex + 1); |
| 5328 | for (const ParsedAttr &AL : ReturnTypeChunk.getAttrs()) { |
| 5329 | if (AL.getKind() == ParsedAttr::AT_ObjCOwnership) { |
| 5330 | AttrLoc = AL.getLoc(); |
| 5331 | break; |
| 5332 | } |
| 5333 | } |
| 5334 | } |
| 5335 | if (AttrLoc.isInvalid()) { |
| 5336 | for (const ParsedAttr &AL : D.getDeclSpec().getAttributes()) { |
| 5337 | if (AL.getKind() == ParsedAttr::AT_ObjCOwnership) { |
| 5338 | AttrLoc = AL.getLoc(); |
| 5339 | break; |
| 5340 | } |
| 5341 | } |
| 5342 | } |
| 5343 | |
| 5344 | if (AttrLoc.isValid()) { |
| 5345 | // The ownership attributes are almost always written via |
| 5346 | // the predefined |
| 5347 | // __strong/__weak/__autoreleasing/__unsafe_unretained. |
| 5348 | if (AttrLoc.isMacroID()) |
| 5349 | AttrLoc = |
| 5350 | S.SourceMgr.getImmediateExpansionRange(AttrLoc).getBegin(); |
| 5351 | |
| 5352 | S.Diag(AttrLoc, diag::warn_arc_lifetime_result_type) |
| 5353 | << T.getQualifiers().getObjCLifetime(); |
| 5354 | } |
| 5355 | } |
| 5356 | |
| 5357 | if (LangOpts.CPlusPlus && D.getDeclSpec().hasTagDefinition()) { |
| 5358 | // C++ [dcl.fct]p6: |
| 5359 | // Types shall not be defined in return or parameter types. |
| 5360 | TagDecl *Tag = cast<TagDecl>(D.getDeclSpec().getRepAsDecl()); |
| 5361 | S.Diag(Tag->getLocation(), diag::err_type_defined_in_result_type) |
| 5362 | << Context.getTypeDeclType(Tag); |
| 5363 | } |
| 5364 | |
| 5365 | // Exception specs are not allowed in typedefs. Complain, but add it |
| 5366 | // anyway. |
| 5367 | if (IsTypedefName && FTI.getExceptionSpecType() && !LangOpts.CPlusPlus17) |
| 5368 | S.Diag(FTI.getExceptionSpecLocBeg(), |
| 5369 | diag::err_exception_spec_in_typedef) |
| 5370 | << (D.getContext() == DeclaratorContext::AliasDecl || |
| 5371 | D.getContext() == DeclaratorContext::AliasTemplate); |
| 5372 | |
| 5373 | // If we see "T var();" or "T var(T());" at block scope, it is probably |
| 5374 | // an attempt to initialize a variable, not a function declaration. |
| 5375 | if (FTI.isAmbiguous) |
| 5376 | warnAboutAmbiguousFunction(S, D, DeclType, T); |
| 5377 | |
| 5378 | FunctionType::ExtInfo EI( |
| 5379 | getCCForDeclaratorChunk(S, D, DeclType.getAttrs(), FTI, chunkIndex)); |
| 5380 | |
| 5381 | // OpenCL disallows functions without a prototype, but it doesn't enforce |
| 5382 | // strict prototypes as in C2x because it allows a function definition to |
| 5383 | // have an identifier list. See OpenCL 3.0 6.11/g for more details. |
| 5384 | if (!FTI.NumParams && !FTI.isVariadic && |
| 5385 | !LangOpts.requiresStrictPrototypes() && !LangOpts.OpenCL) { |
| 5386 | // Simple void foo(), where the incoming T is the result type. |
| 5387 | T = Context.getFunctionNoProtoType(T, EI); |
| 5388 | } else { |
| 5389 | // We allow a zero-parameter variadic function in C if the |
| 5390 | // function is marked with the "overloadable" attribute. Scan |
| 5391 | // for this attribute now. We also allow it in C2x per WG14 N2975. |
| 5392 | if (!FTI.NumParams && FTI.isVariadic && !LangOpts.CPlusPlus) { |
| 5393 | if (LangOpts.C2x) |
| 5394 | S.Diag(FTI.getEllipsisLoc(), |
| 5395 | diag::warn_c17_compat_ellipsis_only_parameter); |
| 5396 | else if (!D.getDeclarationAttributes().hasAttribute( |
| 5397 | ParsedAttr::AT_Overloadable) && |
| 5398 | !D.getAttributes().hasAttribute( |
| 5399 | ParsedAttr::AT_Overloadable) && |
| 5400 | !D.getDeclSpec().getAttributes().hasAttribute( |
| 5401 | ParsedAttr::AT_Overloadable)) |
| 5402 | S.Diag(FTI.getEllipsisLoc(), diag::err_ellipsis_first_param); |
| 5403 | } |
| 5404 | |
| 5405 | if (FTI.NumParams && FTI.Params[0].Param == nullptr) { |
| 5406 | // C99 6.7.5.3p3: Reject int(x,y,z) when it's not a function |
| 5407 | // definition. |
| 5408 | S.Diag(FTI.Params[0].IdentLoc, |
| 5409 | diag::err_ident_list_in_fn_declaration); |
| 5410 | D.setInvalidType(true); |
| 5411 | // Recover by creating a K&R-style function type, if possible. |
| 5412 | T = (!LangOpts.requiresStrictPrototypes() && !LangOpts.OpenCL) |
| 5413 | ? Context.getFunctionNoProtoType(T, EI) |
| 5414 | : Context.IntTy; |
| 5415 | break; |
| 5416 | } |
| 5417 | |
| 5418 | FunctionProtoType::ExtProtoInfo EPI; |
| 5419 | EPI.ExtInfo = EI; |
| 5420 | EPI.Variadic = FTI.isVariadic; |
| 5421 | EPI.EllipsisLoc = FTI.getEllipsisLoc(); |
| 5422 | EPI.HasTrailingReturn = FTI.hasTrailingReturnType(); |
| 5423 | EPI.TypeQuals.addCVRUQualifiers( |
| 5424 | FTI.MethodQualifiers ? FTI.MethodQualifiers->getTypeQualifiers() |
| 5425 | : 0); |
| 5426 | EPI.RefQualifier = !FTI.hasRefQualifier()? RQ_None |
| 5427 | : FTI.RefQualifierIsLValueRef? RQ_LValue |
| 5428 | : RQ_RValue; |
| 5429 | |
| 5430 | // Otherwise, we have a function with a parameter list that is |
| 5431 | // potentially variadic. |
| 5432 | SmallVector<QualType, 16> ParamTys; |
| 5433 | ParamTys.reserve(FTI.NumParams); |
| 5434 | |
| 5435 | SmallVector<FunctionProtoType::ExtParameterInfo, 16> |
| 5436 | ExtParameterInfos(FTI.NumParams); |
| 5437 | bool HasAnyInterestingExtParameterInfos = false; |
| 5438 | |
| 5439 | for (unsigned i = 0, e = FTI.NumParams; i != e; ++i) { |
| 5440 | ParmVarDecl *Param = cast<ParmVarDecl>(FTI.Params[i].Param); |
| 5441 | QualType ParamTy = Param->getType(); |
| 5442 | assert(!ParamTy.isNull() && "Couldn't parse type?")(static_cast <bool> (!ParamTy.isNull() && "Couldn't parse type?" ) ? void (0) : __assert_fail ("!ParamTy.isNull() && \"Couldn't parse type?\"" , "clang/lib/Sema/SemaType.cpp", 5442, __extension__ __PRETTY_FUNCTION__ )); |
| 5443 | |
| 5444 | // Look for 'void'. void is allowed only as a single parameter to a |
| 5445 | // function with no other parameters (C99 6.7.5.3p10). We record |
| 5446 | // int(void) as a FunctionProtoType with an empty parameter list. |
| 5447 | if (ParamTy->isVoidType()) { |
| 5448 | // If this is something like 'float(int, void)', reject it. 'void' |
| 5449 | // is an incomplete type (C99 6.2.5p19) and function decls cannot |
| 5450 | // have parameters of incomplete type. |
| 5451 | if (FTI.NumParams != 1 || FTI.isVariadic) { |
| 5452 | S.Diag(FTI.Params[i].IdentLoc, diag::err_void_only_param); |
| 5453 | ParamTy = Context.IntTy; |
| 5454 | Param->setType(ParamTy); |
| 5455 | } else if (FTI.Params[i].Ident) { |
| 5456 | // Reject, but continue to parse 'int(void abc)'. |
| 5457 | S.Diag(FTI.Params[i].IdentLoc, diag::err_param_with_void_type); |
| 5458 | ParamTy = Context.IntTy; |
| 5459 | Param->setType(ParamTy); |
| 5460 | } else { |
| 5461 | // Reject, but continue to parse 'float(const void)'. |
| 5462 | if (ParamTy.hasQualifiers()) |
| 5463 | S.Diag(DeclType.Loc, diag::err_void_param_qualified); |
| 5464 | |
| 5465 | // Do not add 'void' to the list. |
| 5466 | break; |
| 5467 | } |
| 5468 | } else if (ParamTy->isHalfType()) { |
| 5469 | // Disallow half FP parameters. |
| 5470 | // FIXME: This really should be in BuildFunctionType. |
| 5471 | if (S.getLangOpts().OpenCL) { |
| 5472 | if (!S.getOpenCLOptions().isAvailableOption("cl_khr_fp16", |
| 5473 | S.getLangOpts())) { |
| 5474 | S.Diag(Param->getLocation(), diag::err_opencl_invalid_param) |
| 5475 | << ParamTy << 0; |
| 5476 | D.setInvalidType(); |
| 5477 | Param->setInvalidDecl(); |
| 5478 | } |
| 5479 | } else if (!S.getLangOpts().NativeHalfArgsAndReturns && |
| 5480 | !S.Context.getTargetInfo().allowHalfArgsAndReturns()) { |
| 5481 | S.Diag(Param->getLocation(), |
| 5482 | diag::err_parameters_retval_cannot_have_fp16_type) << 0; |
| 5483 | D.setInvalidType(); |
| 5484 | } |
| 5485 | } else if (!FTI.hasPrototype) { |
| 5486 | if (Context.isPromotableIntegerType(ParamTy)) { |
| 5487 | ParamTy = Context.getPromotedIntegerType(ParamTy); |
| 5488 | Param->setKNRPromoted(true); |
| 5489 | } else if (const BuiltinType *BTy = ParamTy->getAs<BuiltinType>()) { |
| 5490 | if (BTy->getKind() == BuiltinType::Float) { |
| 5491 | ParamTy = Context.DoubleTy; |
| 5492 | Param->setKNRPromoted(true); |
| 5493 | } |
| 5494 | } |
| 5495 | } else if (S.getLangOpts().OpenCL && ParamTy->isBlockPointerType()) { |
| 5496 | // OpenCL 2.0 s6.12.5: A block cannot be a parameter of a function. |
| 5497 | S.Diag(Param->getLocation(), diag::err_opencl_invalid_param) |
| 5498 | << ParamTy << 1 /*hint off*/; |
| 5499 | D.setInvalidType(); |
| 5500 | } |
| 5501 | |
| 5502 | if (LangOpts.ObjCAutoRefCount && Param->hasAttr<NSConsumedAttr>()) { |
| 5503 | ExtParameterInfos[i] = ExtParameterInfos[i].withIsConsumed(true); |
| 5504 | HasAnyInterestingExtParameterInfos = true; |
| 5505 | } |
| 5506 | |
| 5507 | if (auto attr = Param->getAttr<ParameterABIAttr>()) { |
| 5508 | ExtParameterInfos[i] = |
| 5509 | ExtParameterInfos[i].withABI(attr->getABI()); |
| 5510 | HasAnyInterestingExtParameterInfos = true; |
| 5511 | } |
| 5512 | |
| 5513 | if (Param->hasAttr<PassObjectSizeAttr>()) { |
| 5514 | ExtParameterInfos[i] = ExtParameterInfos[i].withHasPassObjectSize(); |
| 5515 | HasAnyInterestingExtParameterInfos = true; |
| 5516 | } |
| 5517 | |
| 5518 | if (Param->hasAttr<NoEscapeAttr>()) { |
| 5519 | ExtParameterInfos[i] = ExtParameterInfos[i].withIsNoEscape(true); |
| 5520 | HasAnyInterestingExtParameterInfos = true; |
| 5521 | } |
| 5522 | |
| 5523 | ParamTys.push_back(ParamTy); |
| 5524 | } |
| 5525 | |
| 5526 | if (HasAnyInterestingExtParameterInfos) { |
| 5527 | EPI.ExtParameterInfos = ExtParameterInfos.data(); |
| 5528 | checkExtParameterInfos(S, ParamTys, EPI, |
| 5529 | [&](unsigned i) { return FTI.Params[i].Param->getLocation(); }); |
| 5530 | } |
| 5531 | |
| 5532 | SmallVector<QualType, 4> Exceptions; |
| 5533 | SmallVector<ParsedType, 2> DynamicExceptions; |
| 5534 | SmallVector<SourceRange, 2> DynamicExceptionRanges; |
| 5535 | Expr *NoexceptExpr = nullptr; |
| 5536 | |
| 5537 | if (FTI.getExceptionSpecType() == EST_Dynamic) { |
| 5538 | // FIXME: It's rather inefficient to have to split into two vectors |
| 5539 | // here. |
| 5540 | unsigned N = FTI.getNumExceptions(); |
| 5541 | DynamicExceptions.reserve(N); |
| 5542 | DynamicExceptionRanges.reserve(N); |
| 5543 | for (unsigned I = 0; I != N; ++I) { |
| 5544 | DynamicExceptions.push_back(FTI.Exceptions[I].Ty); |
| 5545 | DynamicExceptionRanges.push_back(FTI.Exceptions[I].Range); |
| 5546 | } |
| 5547 | } else if (isComputedNoexcept(FTI.getExceptionSpecType())) { |
| 5548 | NoexceptExpr = FTI.NoexceptExpr; |
| 5549 | } |
| 5550 | |
| 5551 | S.checkExceptionSpecification(D.isFunctionDeclarationContext(), |
| 5552 | FTI.getExceptionSpecType(), |
| 5553 | DynamicExceptions, |
| 5554 | DynamicExceptionRanges, |
| 5555 | NoexceptExpr, |
| 5556 | Exceptions, |
| 5557 | EPI.ExceptionSpec); |
| 5558 | |
| 5559 | // FIXME: Set address space from attrs for C++ mode here. |
| 5560 | // OpenCLCPlusPlus: A class member function has an address space. |
| 5561 | auto IsClassMember = [&]() { |
| 5562 | return (!state.getDeclarator().getCXXScopeSpec().isEmpty() && |
| 5563 | state.getDeclarator() |
| 5564 | .getCXXScopeSpec() |
| 5565 | .getScopeRep() |
| 5566 | ->getKind() == NestedNameSpecifier::TypeSpec) || |
| 5567 | state.getDeclarator().getContext() == |
| 5568 | DeclaratorContext::Member || |
| 5569 | state.getDeclarator().getContext() == |
| 5570 | DeclaratorContext::LambdaExpr; |
| 5571 | }; |
| 5572 | |
| 5573 | if (state.getSema().getLangOpts().OpenCLCPlusPlus && IsClassMember()) { |
| 5574 | LangAS ASIdx = LangAS::Default; |
| 5575 | // Take address space attr if any and mark as invalid to avoid adding |
| 5576 | // them later while creating QualType. |
| 5577 | if (FTI.MethodQualifiers) |
| 5578 | for (ParsedAttr &attr : FTI.MethodQualifiers->getAttributes()) { |
| 5579 | LangAS ASIdxNew = attr.asOpenCLLangAS(); |
| 5580 | if (DiagnoseMultipleAddrSpaceAttributes(S, ASIdx, ASIdxNew, |
| 5581 | attr.getLoc())) |
| 5582 | D.setInvalidType(true); |
| 5583 | else |
| 5584 | ASIdx = ASIdxNew; |
| 5585 | } |
| 5586 | // If a class member function's address space is not set, set it to |
| 5587 | // __generic. |
| 5588 | LangAS AS = |
| 5589 | (ASIdx == LangAS::Default ? S.getDefaultCXXMethodAddrSpace() |
| 5590 | : ASIdx); |
| 5591 | EPI.TypeQuals.addAddressSpace(AS); |
| 5592 | } |
| 5593 | T = Context.getFunctionType(T, ParamTys, EPI); |
| 5594 | } |
| 5595 | break; |
| 5596 | } |
| 5597 | case DeclaratorChunk::MemberPointer: { |
| 5598 | // The scope spec must refer to a class, or be dependent. |
| 5599 | CXXScopeSpec &SS = DeclType.Mem.Scope(); |
| 5600 | QualType ClsType; |
| 5601 | |
| 5602 | // Handle pointer nullability. |
| 5603 | inferPointerNullability(SimplePointerKind::MemberPointer, DeclType.Loc, |
| 5604 | DeclType.EndLoc, DeclType.getAttrs(), |
| 5605 | state.getDeclarator().getAttributePool()); |
| 5606 | |
| 5607 | if (SS.isInvalid()) { |
| 5608 | // Avoid emitting extra errors if we already errored on the scope. |
| 5609 | D.setInvalidType(true); |
| 5610 | } else if (S.isDependentScopeSpecifier(SS) || |
| 5611 | isa_and_nonnull<CXXRecordDecl>(S.computeDeclContext(SS))) { |
| 5612 | NestedNameSpecifier *NNS = SS.getScopeRep(); |
| 5613 | NestedNameSpecifier *NNSPrefix = NNS->getPrefix(); |
| 5614 | switch (NNS->getKind()) { |
| 5615 | case NestedNameSpecifier::Identifier: |
| 5616 | ClsType = Context.getDependentNameType(ETK_None, NNSPrefix, |
| 5617 | NNS->getAsIdentifier()); |
| 5618 | break; |
| 5619 | |
| 5620 | case NestedNameSpecifier::Namespace: |
| 5621 | case NestedNameSpecifier::NamespaceAlias: |
| 5622 | case NestedNameSpecifier::Global: |
| 5623 | case NestedNameSpecifier::Super: |
| 5624 | llvm_unreachable("Nested-name-specifier must name a type")::llvm::llvm_unreachable_internal("Nested-name-specifier must name a type" , "clang/lib/Sema/SemaType.cpp", 5624); |
| 5625 | |
| 5626 | case NestedNameSpecifier::TypeSpec: |
| 5627 | case NestedNameSpecifier::TypeSpecWithTemplate: |
| 5628 | ClsType = QualType(NNS->getAsType(), 0); |
| 5629 | // Note: if the NNS has a prefix and ClsType is a nondependent |
| 5630 | // TemplateSpecializationType, then the NNS prefix is NOT included |
| 5631 | // in ClsType; hence we wrap ClsType into an ElaboratedType. |
| 5632 | // NOTE: in particular, no wrap occurs if ClsType already is an |
| 5633 | // Elaborated, DependentName, or DependentTemplateSpecialization. |
| 5634 | if (isa<TemplateSpecializationType>(NNS->getAsType())) |
| 5635 | ClsType = Context.getElaboratedType(ETK_None, NNSPrefix, ClsType); |
| 5636 | break; |
| 5637 | } |
| 5638 | } else { |
| 5639 | S.Diag(DeclType.Mem.Scope().getBeginLoc(), |
| 5640 | diag::err_illegal_decl_mempointer_in_nonclass) |
| 5641 | << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name") |
| 5642 | << DeclType.Mem.Scope().getRange(); |
| 5643 | D.setInvalidType(true); |
| 5644 | } |
| 5645 | |
| 5646 | if (!ClsType.isNull()) |
| 5647 | T = S.BuildMemberPointerType(T, ClsType, DeclType.Loc, |
| 5648 | D.getIdentifier()); |
| 5649 | if (T.isNull()) { |
| 5650 | T = Context.IntTy; |
| 5651 | D.setInvalidType(true); |
| 5652 | } else if (DeclType.Mem.TypeQuals) { |
| 5653 | T = S.BuildQualifiedType(T, DeclType.Loc, DeclType.Mem.TypeQuals); |
| 5654 | } |
| 5655 | break; |
| 5656 | } |
| 5657 | |
| 5658 | case DeclaratorChunk::Pipe: { |
| 5659 | T = S.BuildReadPipeType(T, DeclType.Loc); |
| 5660 | processTypeAttrs(state, T, TAL_DeclSpec, |
| 5661 | D.getMutableDeclSpec().getAttributes()); |
| 5662 | break; |
| 5663 | } |
| 5664 | } |
| 5665 | |
| 5666 | if (T.isNull()) { |
| 5667 | D.setInvalidType(true); |
| 5668 | T = Context.IntTy; |
| 5669 | } |
| 5670 | |
| 5671 | // See if there are any attributes on this declarator chunk. |
| 5672 | processTypeAttrs(state, T, TAL_DeclChunk, DeclType.getAttrs()); |
| 5673 | |
| 5674 | if (DeclType.Kind != DeclaratorChunk::Paren) { |
| 5675 | if (ExpectNoDerefChunk && !IsNoDerefableChunk(DeclType)) |
| 5676 | S.Diag(DeclType.Loc, diag::warn_noderef_on_non_pointer_or_array); |
| 5677 | |
| 5678 | ExpectNoDerefChunk = state.didParseNoDeref(); |
| 5679 | } |
| 5680 | } |
| 5681 | |
| 5682 | if (ExpectNoDerefChunk) |
| 5683 | S.Diag(state.getDeclarator().getBeginLoc(), |
| 5684 | diag::warn_noderef_on_non_pointer_or_array); |
| 5685 | |
| 5686 | // GNU warning -Wstrict-prototypes |
| 5687 | // Warn if a function declaration or definition is without a prototype. |
| 5688 | // This warning is issued for all kinds of unprototyped function |
| 5689 | // declarations (i.e. function type typedef, function pointer etc.) |
| 5690 | // C99 6.7.5.3p14: |
| 5691 | // The empty list in a function declarator that is not part of a definition |
| 5692 | // of that function specifies that no information about the number or types |
| 5693 | // of the parameters is supplied. |
| 5694 | // See ActOnFinishFunctionBody() and MergeFunctionDecl() for handling of |
| 5695 | // function declarations whose behavior changes in C2x. |
| 5696 | if (!LangOpts.requiresStrictPrototypes()) { |
| 5697 | bool IsBlock = false; |
| 5698 | for (const DeclaratorChunk &DeclType : D.type_objects()) { |
| 5699 | switch (DeclType.Kind) { |
| 5700 | case DeclaratorChunk::BlockPointer: |
| 5701 | IsBlock = true; |
| 5702 | break; |
| 5703 | case DeclaratorChunk::Function: { |
| 5704 | const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun; |
| 5705 | // We suppress the warning when there's no LParen location, as this |
| 5706 | // indicates the declaration was an implicit declaration, which gets |
| 5707 | // warned about separately via -Wimplicit-function-declaration. We also |
| 5708 | // suppress the warning when we know the function has a prototype. |
| 5709 | if (!FTI.hasPrototype && FTI.NumParams == 0 && !FTI.isVariadic && |
| 5710 | FTI.getLParenLoc().isValid()) |
| 5711 | S.Diag(DeclType.Loc, diag::warn_strict_prototypes) |
| 5712 | << IsBlock |
| 5713 | << FixItHint::CreateInsertion(FTI.getRParenLoc(), "void"); |
| 5714 | IsBlock = false; |
| 5715 | break; |
| 5716 | } |
| 5717 | default: |
| 5718 | break; |
| 5719 | } |
| 5720 | } |
| 5721 | } |
| 5722 | |
| 5723 | assert(!T.isNull() && "T must not be null after this point")(static_cast <bool> (!T.isNull() && "T must not be null after this point" ) ? void (0) : __assert_fail ("!T.isNull() && \"T must not be null after this point\"" , "clang/lib/Sema/SemaType.cpp", 5723, __extension__ __PRETTY_FUNCTION__ )); |
| 5724 | |
| 5725 | if (LangOpts.CPlusPlus && T->isFunctionType()) { |
| 5726 | const FunctionProtoType *FnTy = T->getAs<FunctionProtoType>(); |
| 5727 | assert(FnTy && "Why oh why is there not a FunctionProtoType here?")(static_cast <bool> (FnTy && "Why oh why is there not a FunctionProtoType here?" ) ? void (0) : __assert_fail ("FnTy && \"Why oh why is there not a FunctionProtoType here?\"" , "clang/lib/Sema/SemaType.cpp", 5727, __extension__ __PRETTY_FUNCTION__ )); |
| 5728 | |
| 5729 | // C++ 8.3.5p4: |
| 5730 | // A cv-qualifier-seq shall only be part of the function type |
| 5731 | // for a nonstatic member function, the function type to which a pointer |
| 5732 | // to member refers, or the top-level function type of a function typedef |
| 5733 | // declaration. |
| 5734 | // |
| 5735 | // Core issue 547 also allows cv-qualifiers on function types that are |
| 5736 | // top-level template type arguments. |
| 5737 | enum { NonMember, Member, DeductionGuide } Kind = NonMember; |
| 5738 | if (D.getName().getKind() == UnqualifiedIdKind::IK_DeductionGuideName) |
| 5739 | Kind = DeductionGuide; |
| 5740 | else if (!D.getCXXScopeSpec().isSet()) { |
| 5741 | if ((D.getContext() == DeclaratorContext::Member || |
| 5742 | D.getContext() == DeclaratorContext::LambdaExpr) && |
| 5743 | !D.getDeclSpec().isFriendSpecified()) |
| 5744 | Kind = Member; |
| 5745 | } else { |
| 5746 | DeclContext *DC = S.computeDeclContext(D.getCXXScopeSpec()); |
| 5747 | if (!DC || DC->isRecord()) |
| 5748 | Kind = Member; |
| 5749 | } |
| 5750 | |
| 5751 | // C++11 [dcl.fct]p6 (w/DR1417): |
| 5752 | // An attempt to specify a function type with a cv-qualifier-seq or a |
| 5753 | // ref-qualifier (including by typedef-name) is ill-formed unless it is: |
| 5754 | // - the function type for a non-static member function, |
| 5755 | // - the function type to which a pointer to member refers, |
| 5756 | // - the top-level function type of a function typedef declaration or |
| 5757 | // alias-declaration, |
| 5758 | // - the type-id in the default argument of a type-parameter, or |
| 5759 | // - the type-id of a template-argument for a type-parameter |
| 5760 | // |
| 5761 | // FIXME: Checking this here is insufficient. We accept-invalid on: |
| 5762 | // |
| 5763 | // template<typename T> struct S { void f(T); }; |
| 5764 | // S<int() const> s; |
| 5765 | // |
| 5766 | // ... for instance. |
| 5767 | if (IsQualifiedFunction && |
| 5768 | !(Kind == Member && |
| 5769 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) && |
| 5770 | !IsTypedefName && D.getContext() != DeclaratorContext::TemplateArg && |
| 5771 | D.getContext() != DeclaratorContext::TemplateTypeArg) { |
| 5772 | SourceLocation Loc = D.getBeginLoc(); |
| 5773 | SourceRange RemovalRange; |
| 5774 | unsigned I; |
| 5775 | if (D.isFunctionDeclarator(I)) { |
| 5776 | SmallVector<SourceLocation, 4> RemovalLocs; |
| 5777 | const DeclaratorChunk &Chunk = D.getTypeObject(I); |
| 5778 | assert(Chunk.Kind == DeclaratorChunk::Function)(static_cast <bool> (Chunk.Kind == DeclaratorChunk::Function ) ? void (0) : __assert_fail ("Chunk.Kind == DeclaratorChunk::Function" , "clang/lib/Sema/SemaType.cpp", 5778, __extension__ __PRETTY_FUNCTION__ )); |
| 5779 | |
| 5780 | if (Chunk.Fun.hasRefQualifier()) |
| 5781 | RemovalLocs.push_back(Chunk.Fun.getRefQualifierLoc()); |
| 5782 | |
| 5783 | if (Chunk.Fun.hasMethodTypeQualifiers()) |
| 5784 | Chunk.Fun.MethodQualifiers->forEachQualifier( |
| 5785 | [&](DeclSpec::TQ TypeQual, StringRef QualName, |
| 5786 | SourceLocation SL) { RemovalLocs.push_back(SL); }); |
| 5787 | |
| 5788 | if (!RemovalLocs.empty()) { |
| 5789 | llvm::sort(RemovalLocs, |
| 5790 | BeforeThanCompare<SourceLocation>(S.getSourceManager())); |
| 5791 | RemovalRange = SourceRange(RemovalLocs.front(), RemovalLocs.back()); |
| 5792 | Loc = RemovalLocs.front(); |
| 5793 | } |
| 5794 | } |
| 5795 | |
| 5796 | S.Diag(Loc, diag::err_invalid_qualified_function_type) |
| 5797 | << Kind << D.isFunctionDeclarator() << T |
| 5798 | << getFunctionQualifiersAsString(FnTy) |
| 5799 | << FixItHint::CreateRemoval(RemovalRange); |
| 5800 | |
| 5801 | // Strip the cv-qualifiers and ref-qualifiers from the type. |
| 5802 | FunctionProtoType::ExtProtoInfo EPI = FnTy->getExtProtoInfo(); |
| 5803 | EPI.TypeQuals.removeCVRQualifiers(); |
| 5804 | EPI.RefQualifier = RQ_None; |
| 5805 | |
| 5806 | T = Context.getFunctionType(FnTy->getReturnType(), FnTy->getParamTypes(), |
| 5807 | EPI); |
| 5808 | // Rebuild any parens around the identifier in the function type. |
| 5809 | for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { |
| 5810 | if (D.getTypeObject(i).Kind != DeclaratorChunk::Paren) |
| 5811 | break; |
| 5812 | T = S.BuildParenType(T); |
| 5813 | } |
| 5814 | } |
| 5815 | } |
| 5816 | |
| 5817 | // Apply any undistributed attributes from the declaration or declarator. |
| 5818 | ParsedAttributesView NonSlidingAttrs; |
| 5819 | for (ParsedAttr &AL : D.getDeclarationAttributes()) { |
| 5820 | if (!AL.slidesFromDeclToDeclSpecLegacyBehavior()) { |
| 5821 | NonSlidingAttrs.addAtEnd(&AL); |
| 5822 | } |
| 5823 | } |
| 5824 | processTypeAttrs(state, T, TAL_DeclName, NonSlidingAttrs); |
| 5825 | processTypeAttrs(state, T, TAL_DeclName, D.getAttributes()); |
| 5826 | |
| 5827 | // Diagnose any ignored type attributes. |
| 5828 | state.diagnoseIgnoredTypeAttrs(T); |
| 5829 | |
| 5830 | // C++0x [dcl.constexpr]p9: |
| 5831 | // A constexpr specifier used in an object declaration declares the object |
| 5832 | // as const. |
| 5833 | if (D.getDeclSpec().getConstexprSpecifier() == ConstexprSpecKind::Constexpr && |
| 5834 | T->isObjectType()) |
| 5835 | T.addConst(); |
| 5836 | |
| 5837 | // C++2a [dcl.fct]p4: |
| 5838 | // A parameter with volatile-qualified type is deprecated |
| 5839 | if (T.isVolatileQualified() && S.getLangOpts().CPlusPlus20 && |
| 5840 | (D.getContext() == DeclaratorContext::Prototype || |
| 5841 | D.getContext() == DeclaratorContext::LambdaExprParameter)) |
| 5842 | S.Diag(D.getIdentifierLoc(), diag::warn_deprecated_volatile_param) << T; |
| 5843 | |
| 5844 | // If there was an ellipsis in the declarator, the declaration declares a |
| 5845 | // parameter pack whose type may be a pack expansion type. |
| 5846 | if (D.hasEllipsis()) { |
| 5847 | // C++0x [dcl.fct]p13: |
| 5848 | // A declarator-id or abstract-declarator containing an ellipsis shall |
| 5849 | // only be used in a parameter-declaration. Such a parameter-declaration |
| 5850 | // is a parameter pack (14.5.3). [...] |
| 5851 | switch (D.getContext()) { |
| 5852 | case DeclaratorContext::Prototype: |
| 5853 | case DeclaratorContext::LambdaExprParameter: |
| 5854 | case DeclaratorContext::RequiresExpr: |
| 5855 | // C++0x [dcl.fct]p13: |
| 5856 | // [...] When it is part of a parameter-declaration-clause, the |
| 5857 | // parameter pack is a function parameter pack (14.5.3). The type T |
| 5858 | // of the declarator-id of the function parameter pack shall contain |
| 5859 | // a template parameter pack; each template parameter pack in T is |
| 5860 | // expanded by the function parameter pack. |
| 5861 | // |
| 5862 | // We represent function parameter packs as function parameters whose |
| 5863 | // type is a pack expansion. |
| 5864 | if (!T->containsUnexpandedParameterPack() && |
| 5865 | (!LangOpts.CPlusPlus20 || !T->getContainedAutoType())) { |
| 5866 | S.Diag(D.getEllipsisLoc(), |
| 5867 | diag::err_function_parameter_pack_without_parameter_packs) |
| 5868 | << T << D.getSourceRange(); |
| 5869 | D.setEllipsisLoc(SourceLocation()); |
| 5870 | } else { |
| 5871 | T = Context.getPackExpansionType(T, std::nullopt, |
| 5872 | /*ExpectPackInType=*/false); |
| 5873 | } |
| 5874 | break; |
| 5875 | case DeclaratorContext::TemplateParam: |
| 5876 | // C++0x [temp.param]p15: |
| 5877 | // If a template-parameter is a [...] is a parameter-declaration that |
| 5878 | // declares a parameter pack (8.3.5), then the template-parameter is a |
| 5879 | // template parameter pack (14.5.3). |
| 5880 | // |
| 5881 | // Note: core issue 778 clarifies that, if there are any unexpanded |
| 5882 | // parameter packs in the type of the non-type template parameter, then |
| 5883 | // it expands those parameter packs. |
| 5884 | if (T->containsUnexpandedParameterPack()) |
| 5885 | T = Context.getPackExpansionType(T, std::nullopt); |
| 5886 | else |
| 5887 | S.Diag(D.getEllipsisLoc(), |
| 5888 | LangOpts.CPlusPlus11 |
| 5889 | ? diag::warn_cxx98_compat_variadic_templates |
| 5890 | : diag::ext_variadic_templates); |
| 5891 | break; |
| 5892 | |
| 5893 | case DeclaratorContext::File: |
| 5894 | case DeclaratorContext::KNRTypeList: |
| 5895 | case DeclaratorContext::ObjCParameter: // FIXME: special diagnostic here? |
| 5896 | case DeclaratorContext::ObjCResult: // FIXME: special diagnostic here? |
| 5897 | case DeclaratorContext::TypeName: |
| 5898 | case DeclaratorContext::FunctionalCast: |
| 5899 | case DeclaratorContext::CXXNew: |
| 5900 | case DeclaratorContext::AliasDecl: |
| 5901 | case DeclaratorContext::AliasTemplate: |
| 5902 | case DeclaratorContext::Member: |
| 5903 | case DeclaratorContext::Block: |
| 5904 | case DeclaratorContext::ForInit: |
| 5905 | case DeclaratorContext::SelectionInit: |
| 5906 | case DeclaratorContext::Condition: |
| 5907 | case DeclaratorContext::CXXCatch: |
| 5908 | case DeclaratorContext::ObjCCatch: |
| 5909 | case DeclaratorContext::BlockLiteral: |
| 5910 | case DeclaratorContext::LambdaExpr: |
| 5911 | case DeclaratorContext::ConversionId: |
| 5912 | case DeclaratorContext::TrailingReturn: |
| 5913 | case DeclaratorContext::TrailingReturnVar: |
| 5914 | case DeclaratorContext::TemplateArg: |
| 5915 | case DeclaratorContext::TemplateTypeArg: |
| 5916 | case DeclaratorContext::Association: |
| 5917 | // FIXME: We may want to allow parameter packs in block-literal contexts |
| 5918 | // in the future. |
| 5919 | S.Diag(D.getEllipsisLoc(), |
| 5920 | diag::err_ellipsis_in_declarator_not_parameter); |
| 5921 | D.setEllipsisLoc(SourceLocation()); |
| 5922 | break; |
| 5923 | } |
| 5924 | } |
| 5925 | |
| 5926 | assert(!T.isNull() && "T must not be null at the end of this function")(static_cast <bool> (!T.isNull() && "T must not be null at the end of this function" ) ? void (0) : __assert_fail ("!T.isNull() && \"T must not be null at the end of this function\"" , "clang/lib/Sema/SemaType.cpp", 5926, __extension__ __PRETTY_FUNCTION__ )); |
| 5927 | if (D.isInvalidType()) |
| 5928 | return Context.getTrivialTypeSourceInfo(T); |
| 5929 | |
| 5930 | return GetTypeSourceInfoForDeclarator(state, T, TInfo); |
| 5931 | } |
| 5932 | |
| 5933 | /// GetTypeForDeclarator - Convert the type for the specified |
| 5934 | /// declarator to Type instances. |
| 5935 | /// |
| 5936 | /// The result of this call will never be null, but the associated |
| 5937 | /// type may be a null type if there's an unrecoverable error. |
| 5938 | TypeSourceInfo *Sema::GetTypeForDeclarator(Declarator &D, Scope *S) { |
| 5939 | // Determine the type of the declarator. Not all forms of declarator |
| 5940 | // have a type. |
| 5941 | |
| 5942 | TypeProcessingState state(*this, D); |
| 5943 | |
| 5944 | TypeSourceInfo *ReturnTypeInfo = nullptr; |
| 5945 | QualType T = GetDeclSpecTypeForDeclarator(state, ReturnTypeInfo); |
| 5946 | if (D.isPrototypeContext() && getLangOpts().ObjCAutoRefCount) |
| 5947 | inferARCWriteback(state, T); |
| 5948 | |
| 5949 | return GetFullTypeForDeclarator(state, T, ReturnTypeInfo); |
| 5950 | } |
| 5951 | |
| 5952 | static void transferARCOwnershipToDeclSpec(Sema &S, |
| 5953 | QualType &declSpecTy, |
| 5954 | Qualifiers::ObjCLifetime ownership) { |
| 5955 | if (declSpecTy->isObjCRetainableType() && |
| 5956 | declSpecTy.getObjCLifetime() == Qualifiers::OCL_None) { |
| 5957 | Qualifiers qs; |
| 5958 | qs.addObjCLifetime(ownership); |
| 5959 | declSpecTy = S.Context.getQualifiedType(declSpecTy, qs); |
| 5960 | } |
| 5961 | } |
| 5962 | |
| 5963 | static void transferARCOwnershipToDeclaratorChunk(TypeProcessingState &state, |
| 5964 | Qualifiers::ObjCLifetime ownership, |
| 5965 | unsigned chunkIndex) { |
| 5966 | Sema &S = state.getSema(); |
| 5967 | Declarator &D = state.getDeclarator(); |
| 5968 | |
| 5969 | // Look for an explicit lifetime attribute. |
| 5970 | DeclaratorChunk &chunk = D.getTypeObject(chunkIndex); |
| 5971 | if (chunk.getAttrs().hasAttribute(ParsedAttr::AT_ObjCOwnership)) |
| 5972 | return; |
| 5973 | |
| 5974 | const char *attrStr = nullptr; |
| 5975 | switch (ownership) { |
| 5976 | case Qualifiers::OCL_None: llvm_unreachable("no ownership!")::llvm::llvm_unreachable_internal("no ownership!", "clang/lib/Sema/SemaType.cpp" , 5976); |
| 5977 | case Qualifiers::OCL_ExplicitNone: attrStr = "none"; break; |
| 5978 | case Qualifiers::OCL_Strong: attrStr = "strong"; break; |
| 5979 | case Qualifiers::OCL_Weak: attrStr = "weak"; break; |
| 5980 | case Qualifiers::OCL_Autoreleasing: attrStr = "autoreleasing"; break; |
| 5981 | } |
| 5982 | |
| 5983 | IdentifierLoc *Arg = new (S.Context) IdentifierLoc; |
| 5984 | Arg->Ident = &S.Context.Idents.get(attrStr); |
| 5985 | Arg->Loc = SourceLocation(); |
| 5986 | |
| 5987 | ArgsUnion Args(Arg); |
| 5988 | |
| 5989 | // If there wasn't one, add one (with an invalid source location |
| 5990 | // so that we don't make an AttributedType for it). |
| 5991 | ParsedAttr *attr = D.getAttributePool().create( |
| 5992 | &S.Context.Idents.get("objc_ownership"), SourceLocation(), |
| 5993 | /*scope*/ nullptr, SourceLocation(), |
| 5994 | /*args*/ &Args, 1, ParsedAttr::AS_GNU); |
| 5995 | chunk.getAttrs().addAtEnd(attr); |
| 5996 | // TODO: mark whether we did this inference? |
| 5997 | } |
| 5998 | |
| 5999 | /// Used for transferring ownership in casts resulting in l-values. |
| 6000 | static void transferARCOwnership(TypeProcessingState &state, |
| 6001 | QualType &declSpecTy, |
| 6002 | Qualifiers::ObjCLifetime ownership) { |
| 6003 | Sema &S = state.getSema(); |
| 6004 | Declarator &D = state.getDeclarator(); |
| 6005 | |
| 6006 | int inner = -1; |
| 6007 | bool hasIndirection = false; |
| 6008 | for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { |
| 6009 | DeclaratorChunk &chunk = D.getTypeObject(i); |