| File: | clang/lib/Sema/SemaCast.cpp |
| Warning: | line 1358, column 14 Called C++ object pointer is null |
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| 1 | //===--- SemaCast.cpp - Semantic Analysis for Casts -----------------------===// | ||||||
| 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 semantic analysis for cast expressions, including | ||||||
| 10 | // 1) C-style casts like '(int) x' | ||||||
| 11 | // 2) C++ functional casts like 'int(x)' | ||||||
| 12 | // 3) C++ named casts like 'static_cast<int>(x)' | ||||||
| 13 | // | ||||||
| 14 | //===----------------------------------------------------------------------===// | ||||||
| 15 | |||||||
| 16 | #include "clang/AST/ASTContext.h" | ||||||
| 17 | #include "clang/AST/ASTStructuralEquivalence.h" | ||||||
| 18 | #include "clang/AST/CXXInheritance.h" | ||||||
| 19 | #include "clang/AST/ExprCXX.h" | ||||||
| 20 | #include "clang/AST/ExprObjC.h" | ||||||
| 21 | #include "clang/AST/RecordLayout.h" | ||||||
| 22 | #include "clang/Basic/PartialDiagnostic.h" | ||||||
| 23 | #include "clang/Basic/TargetInfo.h" | ||||||
| 24 | #include "clang/Lex/Preprocessor.h" | ||||||
| 25 | #include "clang/Sema/Initialization.h" | ||||||
| 26 | #include "clang/Sema/SemaInternal.h" | ||||||
| 27 | #include "llvm/ADT/SmallVector.h" | ||||||
| 28 | #include <set> | ||||||
| 29 | using namespace clang; | ||||||
| 30 | |||||||
| 31 | |||||||
| 32 | |||||||
| 33 | enum TryCastResult { | ||||||
| 34 | TC_NotApplicable, ///< The cast method is not applicable. | ||||||
| 35 | TC_Success, ///< The cast method is appropriate and successful. | ||||||
| 36 | TC_Extension, ///< The cast method is appropriate and accepted as a | ||||||
| 37 | ///< language extension. | ||||||
| 38 | TC_Failed ///< The cast method is appropriate, but failed. A | ||||||
| 39 | ///< diagnostic has been emitted. | ||||||
| 40 | }; | ||||||
| 41 | |||||||
| 42 | static bool isValidCast(TryCastResult TCR) { | ||||||
| 43 | return TCR == TC_Success || TCR == TC_Extension; | ||||||
| 44 | } | ||||||
| 45 | |||||||
| 46 | enum CastType { | ||||||
| 47 | CT_Const, ///< const_cast | ||||||
| 48 | CT_Static, ///< static_cast | ||||||
| 49 | CT_Reinterpret, ///< reinterpret_cast | ||||||
| 50 | CT_Dynamic, ///< dynamic_cast | ||||||
| 51 | CT_CStyle, ///< (Type)expr | ||||||
| 52 | CT_Functional, ///< Type(expr) | ||||||
| 53 | CT_Addrspace ///< addrspace_cast | ||||||
| 54 | }; | ||||||
| 55 | |||||||
| 56 | namespace { | ||||||
| 57 | struct CastOperation { | ||||||
| 58 | CastOperation(Sema &S, QualType destType, ExprResult src) | ||||||
| 59 | : Self(S), SrcExpr(src), DestType(destType), | ||||||
| 60 | ResultType(destType.getNonLValueExprType(S.Context)), | ||||||
| 61 | ValueKind(Expr::getValueKindForType(destType)), | ||||||
| 62 | Kind(CK_Dependent), IsARCUnbridgedCast(false) { | ||||||
| 63 | |||||||
| 64 | // C++ [expr.type]/8.2.2: | ||||||
| 65 | // If a pr-value initially has the type cv-T, where T is a | ||||||
| 66 | // cv-unqualified non-class, non-array type, the type of the | ||||||
| 67 | // expression is adjusted to T prior to any further analysis. | ||||||
| 68 | if (!S.Context.getLangOpts().ObjC && !DestType->isRecordType() && | ||||||
| 69 | !DestType->isArrayType()) { | ||||||
| 70 | DestType = DestType.getUnqualifiedType(); | ||||||
| 71 | } | ||||||
| 72 | |||||||
| 73 | if (const BuiltinType *placeholder = | ||||||
| 74 | src.get()->getType()->getAsPlaceholderType()) { | ||||||
| 75 | PlaceholderKind = placeholder->getKind(); | ||||||
| 76 | } else { | ||||||
| 77 | PlaceholderKind = (BuiltinType::Kind) 0; | ||||||
| 78 | } | ||||||
| 79 | } | ||||||
| 80 | |||||||
| 81 | Sema &Self; | ||||||
| 82 | ExprResult SrcExpr; | ||||||
| 83 | QualType DestType; | ||||||
| 84 | QualType ResultType; | ||||||
| 85 | ExprValueKind ValueKind; | ||||||
| 86 | CastKind Kind; | ||||||
| 87 | BuiltinType::Kind PlaceholderKind; | ||||||
| 88 | CXXCastPath BasePath; | ||||||
| 89 | bool IsARCUnbridgedCast; | ||||||
| 90 | |||||||
| 91 | SourceRange OpRange; | ||||||
| 92 | SourceRange DestRange; | ||||||
| 93 | |||||||
| 94 | // Top-level semantics-checking routines. | ||||||
| 95 | void CheckConstCast(); | ||||||
| 96 | void CheckReinterpretCast(); | ||||||
| 97 | void CheckStaticCast(); | ||||||
| 98 | void CheckDynamicCast(); | ||||||
| 99 | void CheckCXXCStyleCast(bool FunctionalCast, bool ListInitialization); | ||||||
| 100 | void CheckCStyleCast(); | ||||||
| 101 | void CheckBuiltinBitCast(); | ||||||
| 102 | void CheckAddrspaceCast(); | ||||||
| 103 | |||||||
| 104 | void updatePartOfExplicitCastFlags(CastExpr *CE) { | ||||||
| 105 | // Walk down from the CE to the OrigSrcExpr, and mark all immediate | ||||||
| 106 | // ImplicitCastExpr's as being part of ExplicitCastExpr. The original CE | ||||||
| 107 | // (which is a ExplicitCastExpr), and the OrigSrcExpr are not touched. | ||||||
| 108 | for (; auto *ICE = dyn_cast<ImplicitCastExpr>(CE->getSubExpr()); CE = ICE) | ||||||
| 109 | ICE->setIsPartOfExplicitCast(true); | ||||||
| 110 | } | ||||||
| 111 | |||||||
| 112 | /// Complete an apparently-successful cast operation that yields | ||||||
| 113 | /// the given expression. | ||||||
| 114 | ExprResult complete(CastExpr *castExpr) { | ||||||
| 115 | // If this is an unbridged cast, wrap the result in an implicit | ||||||
| 116 | // cast that yields the unbridged-cast placeholder type. | ||||||
| 117 | if (IsARCUnbridgedCast) { | ||||||
| 118 | castExpr = ImplicitCastExpr::Create( | ||||||
| 119 | Self.Context, Self.Context.ARCUnbridgedCastTy, CK_Dependent, | ||||||
| 120 | castExpr, nullptr, castExpr->getValueKind(), | ||||||
| 121 | Self.CurFPFeatureOverrides()); | ||||||
| 122 | } | ||||||
| 123 | updatePartOfExplicitCastFlags(castExpr); | ||||||
| 124 | return castExpr; | ||||||
| 125 | } | ||||||
| 126 | |||||||
| 127 | // Internal convenience methods. | ||||||
| 128 | |||||||
| 129 | /// Try to handle the given placeholder expression kind. Return | ||||||
| 130 | /// true if the source expression has the appropriate placeholder | ||||||
| 131 | /// kind. A placeholder can only be claimed once. | ||||||
| 132 | bool claimPlaceholder(BuiltinType::Kind K) { | ||||||
| 133 | if (PlaceholderKind != K) return false; | ||||||
| 134 | |||||||
| 135 | PlaceholderKind = (BuiltinType::Kind) 0; | ||||||
| 136 | return true; | ||||||
| 137 | } | ||||||
| 138 | |||||||
| 139 | bool isPlaceholder() const { | ||||||
| 140 | return PlaceholderKind != 0; | ||||||
| 141 | } | ||||||
| 142 | bool isPlaceholder(BuiltinType::Kind K) const { | ||||||
| 143 | return PlaceholderKind == K; | ||||||
| 144 | } | ||||||
| 145 | |||||||
| 146 | // Language specific cast restrictions for address spaces. | ||||||
| 147 | void checkAddressSpaceCast(QualType SrcType, QualType DestType); | ||||||
| 148 | |||||||
| 149 | void checkCastAlign() { | ||||||
| 150 | Self.CheckCastAlign(SrcExpr.get(), DestType, OpRange); | ||||||
| 151 | } | ||||||
| 152 | |||||||
| 153 | void checkObjCConversion(Sema::CheckedConversionKind CCK) { | ||||||
| 154 | assert(Self.getLangOpts().allowsNonTrivialObjCLifetimeQualifiers())(static_cast <bool> (Self.getLangOpts().allowsNonTrivialObjCLifetimeQualifiers ()) ? void (0) : __assert_fail ("Self.getLangOpts().allowsNonTrivialObjCLifetimeQualifiers()" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 154, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 155 | |||||||
| 156 | Expr *src = SrcExpr.get(); | ||||||
| 157 | if (Self.CheckObjCConversion(OpRange, DestType, src, CCK) == | ||||||
| 158 | Sema::ACR_unbridged) | ||||||
| 159 | IsARCUnbridgedCast = true; | ||||||
| 160 | SrcExpr = src; | ||||||
| 161 | } | ||||||
| 162 | |||||||
| 163 | /// Check for and handle non-overload placeholder expressions. | ||||||
| 164 | void checkNonOverloadPlaceholders() { | ||||||
| 165 | if (!isPlaceholder() || isPlaceholder(BuiltinType::Overload)) | ||||||
| 166 | return; | ||||||
| 167 | |||||||
| 168 | SrcExpr = Self.CheckPlaceholderExpr(SrcExpr.get()); | ||||||
| 169 | if (SrcExpr.isInvalid()) | ||||||
| 170 | return; | ||||||
| 171 | PlaceholderKind = (BuiltinType::Kind) 0; | ||||||
| 172 | } | ||||||
| 173 | }; | ||||||
| 174 | |||||||
| 175 | void CheckNoDeref(Sema &S, const QualType FromType, const QualType ToType, | ||||||
| 176 | SourceLocation OpLoc) { | ||||||
| 177 | if (const auto *PtrType = dyn_cast<PointerType>(FromType)) { | ||||||
| 178 | if (PtrType->getPointeeType()->hasAttr(attr::NoDeref)) { | ||||||
| 179 | if (const auto *DestType = dyn_cast<PointerType>(ToType)) { | ||||||
| 180 | if (!DestType->getPointeeType()->hasAttr(attr::NoDeref)) { | ||||||
| 181 | S.Diag(OpLoc, diag::warn_noderef_to_dereferenceable_pointer); | ||||||
| 182 | } | ||||||
| 183 | } | ||||||
| 184 | } | ||||||
| 185 | } | ||||||
| 186 | } | ||||||
| 187 | |||||||
| 188 | struct CheckNoDerefRAII { | ||||||
| 189 | CheckNoDerefRAII(CastOperation &Op) : Op(Op) {} | ||||||
| 190 | ~CheckNoDerefRAII() { | ||||||
| 191 | if (!Op.SrcExpr.isInvalid()) | ||||||
| 192 | CheckNoDeref(Op.Self, Op.SrcExpr.get()->getType(), Op.ResultType, | ||||||
| 193 | Op.OpRange.getBegin()); | ||||||
| 194 | } | ||||||
| 195 | |||||||
| 196 | CastOperation &Op; | ||||||
| 197 | }; | ||||||
| 198 | } | ||||||
| 199 | |||||||
| 200 | static void DiagnoseCastQual(Sema &Self, const ExprResult &SrcExpr, | ||||||
| 201 | QualType DestType); | ||||||
| 202 | |||||||
| 203 | // The Try functions attempt a specific way of casting. If they succeed, they | ||||||
| 204 | // return TC_Success. If their way of casting is not appropriate for the given | ||||||
| 205 | // arguments, they return TC_NotApplicable and *may* set diag to a diagnostic | ||||||
| 206 | // to emit if no other way succeeds. If their way of casting is appropriate but | ||||||
| 207 | // fails, they return TC_Failed and *must* set diag; they can set it to 0 if | ||||||
| 208 | // they emit a specialized diagnostic. | ||||||
| 209 | // All diagnostics returned by these functions must expect the same three | ||||||
| 210 | // arguments: | ||||||
| 211 | // %0: Cast Type (a value from the CastType enumeration) | ||||||
| 212 | // %1: Source Type | ||||||
| 213 | // %2: Destination Type | ||||||
| 214 | static TryCastResult TryLValueToRValueCast(Sema &Self, Expr *SrcExpr, | ||||||
| 215 | QualType DestType, bool CStyle, | ||||||
| 216 | CastKind &Kind, | ||||||
| 217 | CXXCastPath &BasePath, | ||||||
| 218 | unsigned &msg); | ||||||
| 219 | static TryCastResult TryStaticReferenceDowncast(Sema &Self, Expr *SrcExpr, | ||||||
| 220 | QualType DestType, bool CStyle, | ||||||
| 221 | SourceRange OpRange, | ||||||
| 222 | unsigned &msg, | ||||||
| 223 | CastKind &Kind, | ||||||
| 224 | CXXCastPath &BasePath); | ||||||
| 225 | static TryCastResult TryStaticPointerDowncast(Sema &Self, QualType SrcType, | ||||||
| 226 | QualType DestType, bool CStyle, | ||||||
| 227 | SourceRange OpRange, | ||||||
| 228 | unsigned &msg, | ||||||
| 229 | CastKind &Kind, | ||||||
| 230 | CXXCastPath &BasePath); | ||||||
| 231 | static TryCastResult TryStaticDowncast(Sema &Self, CanQualType SrcType, | ||||||
| 232 | CanQualType DestType, bool CStyle, | ||||||
| 233 | SourceRange OpRange, | ||||||
| 234 | QualType OrigSrcType, | ||||||
| 235 | QualType OrigDestType, unsigned &msg, | ||||||
| 236 | CastKind &Kind, | ||||||
| 237 | CXXCastPath &BasePath); | ||||||
| 238 | static TryCastResult TryStaticMemberPointerUpcast(Sema &Self, ExprResult &SrcExpr, | ||||||
| 239 | QualType SrcType, | ||||||
| 240 | QualType DestType,bool CStyle, | ||||||
| 241 | SourceRange OpRange, | ||||||
| 242 | unsigned &msg, | ||||||
| 243 | CastKind &Kind, | ||||||
| 244 | CXXCastPath &BasePath); | ||||||
| 245 | |||||||
| 246 | static TryCastResult TryStaticImplicitCast(Sema &Self, ExprResult &SrcExpr, | ||||||
| 247 | QualType DestType, | ||||||
| 248 | Sema::CheckedConversionKind CCK, | ||||||
| 249 | SourceRange OpRange, | ||||||
| 250 | unsigned &msg, CastKind &Kind, | ||||||
| 251 | bool ListInitialization); | ||||||
| 252 | static TryCastResult TryStaticCast(Sema &Self, ExprResult &SrcExpr, | ||||||
| 253 | QualType DestType, | ||||||
| 254 | Sema::CheckedConversionKind CCK, | ||||||
| 255 | SourceRange OpRange, | ||||||
| 256 | unsigned &msg, CastKind &Kind, | ||||||
| 257 | CXXCastPath &BasePath, | ||||||
| 258 | bool ListInitialization); | ||||||
| 259 | static TryCastResult TryConstCast(Sema &Self, ExprResult &SrcExpr, | ||||||
| 260 | QualType DestType, bool CStyle, | ||||||
| 261 | unsigned &msg); | ||||||
| 262 | static TryCastResult TryReinterpretCast(Sema &Self, ExprResult &SrcExpr, | ||||||
| 263 | QualType DestType, bool CStyle, | ||||||
| 264 | SourceRange OpRange, unsigned &msg, | ||||||
| 265 | CastKind &Kind); | ||||||
| 266 | static TryCastResult TryAddressSpaceCast(Sema &Self, ExprResult &SrcExpr, | ||||||
| 267 | QualType DestType, bool CStyle, | ||||||
| 268 | unsigned &msg, CastKind &Kind); | ||||||
| 269 | |||||||
| 270 | /// ActOnCXXNamedCast - Parse | ||||||
| 271 | /// {dynamic,static,reinterpret,const,addrspace}_cast's. | ||||||
| 272 | ExprResult | ||||||
| 273 | Sema::ActOnCXXNamedCast(SourceLocation OpLoc, tok::TokenKind Kind, | ||||||
| 274 | SourceLocation LAngleBracketLoc, Declarator &D, | ||||||
| 275 | SourceLocation RAngleBracketLoc, | ||||||
| 276 | SourceLocation LParenLoc, Expr *E, | ||||||
| 277 | SourceLocation RParenLoc) { | ||||||
| 278 | |||||||
| 279 | assert(!D.isInvalidType())(static_cast <bool> (!D.isInvalidType()) ? void (0) : __assert_fail ("!D.isInvalidType()", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 279, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 280 | |||||||
| 281 | TypeSourceInfo *TInfo = GetTypeForDeclaratorCast(D, E->getType()); | ||||||
| 282 | if (D.isInvalidType()) | ||||||
| 283 | return ExprError(); | ||||||
| 284 | |||||||
| 285 | if (getLangOpts().CPlusPlus) { | ||||||
| 286 | // Check that there are no default arguments (C++ only). | ||||||
| 287 | CheckExtraCXXDefaultArguments(D); | ||||||
| 288 | } | ||||||
| 289 | |||||||
| 290 | return BuildCXXNamedCast(OpLoc, Kind, TInfo, E, | ||||||
| 291 | SourceRange(LAngleBracketLoc, RAngleBracketLoc), | ||||||
| 292 | SourceRange(LParenLoc, RParenLoc)); | ||||||
| 293 | } | ||||||
| 294 | |||||||
| 295 | ExprResult | ||||||
| 296 | Sema::BuildCXXNamedCast(SourceLocation OpLoc, tok::TokenKind Kind, | ||||||
| 297 | TypeSourceInfo *DestTInfo, Expr *E, | ||||||
| 298 | SourceRange AngleBrackets, SourceRange Parens) { | ||||||
| 299 | ExprResult Ex = E; | ||||||
| 300 | QualType DestType = DestTInfo->getType(); | ||||||
| 301 | |||||||
| 302 | // If the type is dependent, we won't do the semantic analysis now. | ||||||
| 303 | bool TypeDependent = | ||||||
| 304 | DestType->isDependentType() || Ex.get()->isTypeDependent(); | ||||||
| 305 | |||||||
| 306 | CastOperation Op(*this, DestType, E); | ||||||
| 307 | Op.OpRange = SourceRange(OpLoc, Parens.getEnd()); | ||||||
| 308 | Op.DestRange = AngleBrackets; | ||||||
| 309 | |||||||
| 310 | switch (Kind) { | ||||||
| 311 | default: llvm_unreachable("Unknown C++ cast!")::llvm::llvm_unreachable_internal("Unknown C++ cast!", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 311); | ||||||
| 312 | |||||||
| 313 | case tok::kw_addrspace_cast: | ||||||
| 314 | if (!TypeDependent) { | ||||||
| 315 | Op.CheckAddrspaceCast(); | ||||||
| 316 | if (Op.SrcExpr.isInvalid()) | ||||||
| 317 | return ExprError(); | ||||||
| 318 | } | ||||||
| 319 | return Op.complete(CXXAddrspaceCastExpr::Create( | ||||||
| 320 | Context, Op.ResultType, Op.ValueKind, Op.Kind, Op.SrcExpr.get(), | ||||||
| 321 | DestTInfo, OpLoc, Parens.getEnd(), AngleBrackets)); | ||||||
| 322 | |||||||
| 323 | case tok::kw_const_cast: | ||||||
| 324 | if (!TypeDependent) { | ||||||
| 325 | Op.CheckConstCast(); | ||||||
| 326 | if (Op.SrcExpr.isInvalid()) | ||||||
| 327 | return ExprError(); | ||||||
| 328 | DiscardMisalignedMemberAddress(DestType.getTypePtr(), E); | ||||||
| 329 | } | ||||||
| 330 | return Op.complete(CXXConstCastExpr::Create(Context, Op.ResultType, | ||||||
| 331 | Op.ValueKind, Op.SrcExpr.get(), DestTInfo, | ||||||
| 332 | OpLoc, Parens.getEnd(), | ||||||
| 333 | AngleBrackets)); | ||||||
| 334 | |||||||
| 335 | case tok::kw_dynamic_cast: { | ||||||
| 336 | // dynamic_cast is not supported in C++ for OpenCL. | ||||||
| 337 | if (getLangOpts().OpenCLCPlusPlus) { | ||||||
| 338 | return ExprError(Diag(OpLoc, diag::err_openclcxx_not_supported) | ||||||
| 339 | << "dynamic_cast"); | ||||||
| 340 | } | ||||||
| 341 | |||||||
| 342 | if (!TypeDependent) { | ||||||
| 343 | Op.CheckDynamicCast(); | ||||||
| 344 | if (Op.SrcExpr.isInvalid()) | ||||||
| 345 | return ExprError(); | ||||||
| 346 | } | ||||||
| 347 | return Op.complete(CXXDynamicCastExpr::Create(Context, Op.ResultType, | ||||||
| 348 | Op.ValueKind, Op.Kind, Op.SrcExpr.get(), | ||||||
| 349 | &Op.BasePath, DestTInfo, | ||||||
| 350 | OpLoc, Parens.getEnd(), | ||||||
| 351 | AngleBrackets)); | ||||||
| 352 | } | ||||||
| 353 | case tok::kw_reinterpret_cast: { | ||||||
| 354 | if (!TypeDependent) { | ||||||
| 355 | Op.CheckReinterpretCast(); | ||||||
| 356 | if (Op.SrcExpr.isInvalid()) | ||||||
| 357 | return ExprError(); | ||||||
| 358 | DiscardMisalignedMemberAddress(DestType.getTypePtr(), E); | ||||||
| 359 | } | ||||||
| 360 | return Op.complete(CXXReinterpretCastExpr::Create(Context, Op.ResultType, | ||||||
| 361 | Op.ValueKind, Op.Kind, Op.SrcExpr.get(), | ||||||
| 362 | nullptr, DestTInfo, OpLoc, | ||||||
| 363 | Parens.getEnd(), | ||||||
| 364 | AngleBrackets)); | ||||||
| 365 | } | ||||||
| 366 | case tok::kw_static_cast: { | ||||||
| 367 | if (!TypeDependent) { | ||||||
| 368 | Op.CheckStaticCast(); | ||||||
| 369 | if (Op.SrcExpr.isInvalid()) | ||||||
| 370 | return ExprError(); | ||||||
| 371 | DiscardMisalignedMemberAddress(DestType.getTypePtr(), E); | ||||||
| 372 | } | ||||||
| 373 | |||||||
| 374 | return Op.complete(CXXStaticCastExpr::Create( | ||||||
| 375 | Context, Op.ResultType, Op.ValueKind, Op.Kind, Op.SrcExpr.get(), | ||||||
| 376 | &Op.BasePath, DestTInfo, CurFPFeatureOverrides(), OpLoc, | ||||||
| 377 | Parens.getEnd(), AngleBrackets)); | ||||||
| 378 | } | ||||||
| 379 | } | ||||||
| 380 | } | ||||||
| 381 | |||||||
| 382 | ExprResult Sema::ActOnBuiltinBitCastExpr(SourceLocation KWLoc, Declarator &D, | ||||||
| 383 | ExprResult Operand, | ||||||
| 384 | SourceLocation RParenLoc) { | ||||||
| 385 | assert(!D.isInvalidType())(static_cast <bool> (!D.isInvalidType()) ? void (0) : __assert_fail ("!D.isInvalidType()", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 385, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 386 | |||||||
| 387 | TypeSourceInfo *TInfo = GetTypeForDeclaratorCast(D, Operand.get()->getType()); | ||||||
| 388 | if (D.isInvalidType()) | ||||||
| 389 | return ExprError(); | ||||||
| 390 | |||||||
| 391 | return BuildBuiltinBitCastExpr(KWLoc, TInfo, Operand.get(), RParenLoc); | ||||||
| 392 | } | ||||||
| 393 | |||||||
| 394 | ExprResult Sema::BuildBuiltinBitCastExpr(SourceLocation KWLoc, | ||||||
| 395 | TypeSourceInfo *TSI, Expr *Operand, | ||||||
| 396 | SourceLocation RParenLoc) { | ||||||
| 397 | CastOperation Op(*this, TSI->getType(), Operand); | ||||||
| 398 | Op.OpRange = SourceRange(KWLoc, RParenLoc); | ||||||
| 399 | TypeLoc TL = TSI->getTypeLoc(); | ||||||
| 400 | Op.DestRange = SourceRange(TL.getBeginLoc(), TL.getEndLoc()); | ||||||
| 401 | |||||||
| 402 | if (!Operand->isTypeDependent() && !TSI->getType()->isDependentType()) { | ||||||
| 403 | Op.CheckBuiltinBitCast(); | ||||||
| 404 | if (Op.SrcExpr.isInvalid()) | ||||||
| 405 | return ExprError(); | ||||||
| 406 | } | ||||||
| 407 | |||||||
| 408 | BuiltinBitCastExpr *BCE = | ||||||
| 409 | new (Context) BuiltinBitCastExpr(Op.ResultType, Op.ValueKind, Op.Kind, | ||||||
| 410 | Op.SrcExpr.get(), TSI, KWLoc, RParenLoc); | ||||||
| 411 | return Op.complete(BCE); | ||||||
| 412 | } | ||||||
| 413 | |||||||
| 414 | /// Try to diagnose a failed overloaded cast. Returns true if | ||||||
| 415 | /// diagnostics were emitted. | ||||||
| 416 | static bool tryDiagnoseOverloadedCast(Sema &S, CastType CT, | ||||||
| 417 | SourceRange range, Expr *src, | ||||||
| 418 | QualType destType, | ||||||
| 419 | bool listInitialization) { | ||||||
| 420 | switch (CT) { | ||||||
| 421 | // These cast kinds don't consider user-defined conversions. | ||||||
| 422 | case CT_Const: | ||||||
| 423 | case CT_Reinterpret: | ||||||
| 424 | case CT_Dynamic: | ||||||
| 425 | case CT_Addrspace: | ||||||
| 426 | return false; | ||||||
| 427 | |||||||
| 428 | // These do. | ||||||
| 429 | case CT_Static: | ||||||
| 430 | case CT_CStyle: | ||||||
| 431 | case CT_Functional: | ||||||
| 432 | break; | ||||||
| 433 | } | ||||||
| 434 | |||||||
| 435 | QualType srcType = src->getType(); | ||||||
| 436 | if (!destType->isRecordType() && !srcType->isRecordType()) | ||||||
| 437 | return false; | ||||||
| 438 | |||||||
| 439 | InitializedEntity entity = InitializedEntity::InitializeTemporary(destType); | ||||||
| 440 | InitializationKind initKind | ||||||
| 441 | = (CT == CT_CStyle)? InitializationKind::CreateCStyleCast(range.getBegin(), | ||||||
| 442 | range, listInitialization) | ||||||
| 443 | : (CT == CT_Functional)? InitializationKind::CreateFunctionalCast(range, | ||||||
| 444 | listInitialization) | ||||||
| 445 | : InitializationKind::CreateCast(/*type range?*/ range); | ||||||
| 446 | InitializationSequence sequence(S, entity, initKind, src); | ||||||
| 447 | |||||||
| 448 | assert(sequence.Failed() && "initialization succeeded on second try?")(static_cast <bool> (sequence.Failed() && "initialization succeeded on second try?" ) ? void (0) : __assert_fail ("sequence.Failed() && \"initialization succeeded on second try?\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 448, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 449 | switch (sequence.getFailureKind()) { | ||||||
| 450 | default: return false; | ||||||
| 451 | |||||||
| 452 | case InitializationSequence::FK_ConstructorOverloadFailed: | ||||||
| 453 | case InitializationSequence::FK_UserConversionOverloadFailed: | ||||||
| 454 | break; | ||||||
| 455 | } | ||||||
| 456 | |||||||
| 457 | OverloadCandidateSet &candidates = sequence.getFailedCandidateSet(); | ||||||
| 458 | |||||||
| 459 | unsigned msg = 0; | ||||||
| 460 | OverloadCandidateDisplayKind howManyCandidates = OCD_AllCandidates; | ||||||
| 461 | |||||||
| 462 | switch (sequence.getFailedOverloadResult()) { | ||||||
| 463 | case OR_Success: llvm_unreachable("successful failed overload")::llvm::llvm_unreachable_internal("successful failed overload" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 463); | ||||||
| 464 | case OR_No_Viable_Function: | ||||||
| 465 | if (candidates.empty()) | ||||||
| 466 | msg = diag::err_ovl_no_conversion_in_cast; | ||||||
| 467 | else | ||||||
| 468 | msg = diag::err_ovl_no_viable_conversion_in_cast; | ||||||
| 469 | howManyCandidates = OCD_AllCandidates; | ||||||
| 470 | break; | ||||||
| 471 | |||||||
| 472 | case OR_Ambiguous: | ||||||
| 473 | msg = diag::err_ovl_ambiguous_conversion_in_cast; | ||||||
| 474 | howManyCandidates = OCD_AmbiguousCandidates; | ||||||
| 475 | break; | ||||||
| 476 | |||||||
| 477 | case OR_Deleted: | ||||||
| 478 | msg = diag::err_ovl_deleted_conversion_in_cast; | ||||||
| 479 | howManyCandidates = OCD_ViableCandidates; | ||||||
| 480 | break; | ||||||
| 481 | } | ||||||
| 482 | |||||||
| 483 | candidates.NoteCandidates( | ||||||
| 484 | PartialDiagnosticAt(range.getBegin(), | ||||||
| 485 | S.PDiag(msg) << CT << srcType << destType << range | ||||||
| 486 | << src->getSourceRange()), | ||||||
| 487 | S, howManyCandidates, src); | ||||||
| 488 | |||||||
| 489 | return true; | ||||||
| 490 | } | ||||||
| 491 | |||||||
| 492 | /// Diagnose a failed cast. | ||||||
| 493 | static void diagnoseBadCast(Sema &S, unsigned msg, CastType castType, | ||||||
| 494 | SourceRange opRange, Expr *src, QualType destType, | ||||||
| 495 | bool listInitialization) { | ||||||
| 496 | if (msg == diag::err_bad_cxx_cast_generic && | ||||||
| 497 | tryDiagnoseOverloadedCast(S, castType, opRange, src, destType, | ||||||
| 498 | listInitialization)) | ||||||
| 499 | return; | ||||||
| 500 | |||||||
| 501 | S.Diag(opRange.getBegin(), msg) << castType | ||||||
| 502 | << src->getType() << destType << opRange << src->getSourceRange(); | ||||||
| 503 | |||||||
| 504 | // Detect if both types are (ptr to) class, and note any incompleteness. | ||||||
| 505 | int DifferentPtrness = 0; | ||||||
| 506 | QualType From = destType; | ||||||
| 507 | if (auto Ptr = From->getAs<PointerType>()) { | ||||||
| 508 | From = Ptr->getPointeeType(); | ||||||
| 509 | DifferentPtrness++; | ||||||
| 510 | } | ||||||
| 511 | QualType To = src->getType(); | ||||||
| 512 | if (auto Ptr = To->getAs<PointerType>()) { | ||||||
| 513 | To = Ptr->getPointeeType(); | ||||||
| 514 | DifferentPtrness--; | ||||||
| 515 | } | ||||||
| 516 | if (!DifferentPtrness) { | ||||||
| 517 | auto RecFrom = From->getAs<RecordType>(); | ||||||
| 518 | auto RecTo = To->getAs<RecordType>(); | ||||||
| 519 | if (RecFrom && RecTo) { | ||||||
| 520 | auto DeclFrom = RecFrom->getAsCXXRecordDecl(); | ||||||
| 521 | if (!DeclFrom->isCompleteDefinition()) | ||||||
| 522 | S.Diag(DeclFrom->getLocation(), diag::note_type_incomplete) << DeclFrom; | ||||||
| 523 | auto DeclTo = RecTo->getAsCXXRecordDecl(); | ||||||
| 524 | if (!DeclTo->isCompleteDefinition()) | ||||||
| 525 | S.Diag(DeclTo->getLocation(), diag::note_type_incomplete) << DeclTo; | ||||||
| 526 | } | ||||||
| 527 | } | ||||||
| 528 | } | ||||||
| 529 | |||||||
| 530 | namespace { | ||||||
| 531 | /// The kind of unwrapping we did when determining whether a conversion casts | ||||||
| 532 | /// away constness. | ||||||
| 533 | enum CastAwayConstnessKind { | ||||||
| 534 | /// The conversion does not cast away constness. | ||||||
| 535 | CACK_None = 0, | ||||||
| 536 | /// We unwrapped similar types. | ||||||
| 537 | CACK_Similar = 1, | ||||||
| 538 | /// We unwrapped dissimilar types with similar representations (eg, a pointer | ||||||
| 539 | /// versus an Objective-C object pointer). | ||||||
| 540 | CACK_SimilarKind = 2, | ||||||
| 541 | /// We unwrapped representationally-unrelated types, such as a pointer versus | ||||||
| 542 | /// a pointer-to-member. | ||||||
| 543 | CACK_Incoherent = 3, | ||||||
| 544 | }; | ||||||
| 545 | } | ||||||
| 546 | |||||||
| 547 | /// Unwrap one level of types for CastsAwayConstness. | ||||||
| 548 | /// | ||||||
| 549 | /// Like Sema::UnwrapSimilarTypes, this removes one level of indirection from | ||||||
| 550 | /// both types, provided that they're both pointer-like or array-like. Unlike | ||||||
| 551 | /// the Sema function, doesn't care if the unwrapped pieces are related. | ||||||
| 552 | /// | ||||||
| 553 | /// This function may remove additional levels as necessary for correctness: | ||||||
| 554 | /// the resulting T1 is unwrapped sufficiently that it is never an array type, | ||||||
| 555 | /// so that its qualifiers can be directly compared to those of T2 (which will | ||||||
| 556 | /// have the combined set of qualifiers from all indermediate levels of T2), | ||||||
| 557 | /// as (effectively) required by [expr.const.cast]p7 replacing T1's qualifiers | ||||||
| 558 | /// with those from T2. | ||||||
| 559 | static CastAwayConstnessKind | ||||||
| 560 | unwrapCastAwayConstnessLevel(ASTContext &Context, QualType &T1, QualType &T2) { | ||||||
| 561 | enum { None, Ptr, MemPtr, BlockPtr, Array }; | ||||||
| 562 | auto Classify = [](QualType T) { | ||||||
| 563 | if (T->isAnyPointerType()) return Ptr; | ||||||
| 564 | if (T->isMemberPointerType()) return MemPtr; | ||||||
| 565 | if (T->isBlockPointerType()) return BlockPtr; | ||||||
| 566 | // We somewhat-arbitrarily don't look through VLA types here. This is at | ||||||
| 567 | // least consistent with the behavior of UnwrapSimilarTypes. | ||||||
| 568 | if (T->isConstantArrayType() || T->isIncompleteArrayType()) return Array; | ||||||
| 569 | return None; | ||||||
| 570 | }; | ||||||
| 571 | |||||||
| 572 | auto Unwrap = [&](QualType T) { | ||||||
| 573 | if (auto *AT = Context.getAsArrayType(T)) | ||||||
| 574 | return AT->getElementType(); | ||||||
| 575 | return T->getPointeeType(); | ||||||
| 576 | }; | ||||||
| 577 | |||||||
| 578 | CastAwayConstnessKind Kind; | ||||||
| 579 | |||||||
| 580 | if (T2->isReferenceType()) { | ||||||
| 581 | // Special case: if the destination type is a reference type, unwrap it as | ||||||
| 582 | // the first level. (The source will have been an lvalue expression in this | ||||||
| 583 | // case, so there is no corresponding "reference to" in T1 to remove.) This | ||||||
| 584 | // simulates removing a "pointer to" from both sides. | ||||||
| 585 | T2 = T2->getPointeeType(); | ||||||
| 586 | Kind = CastAwayConstnessKind::CACK_Similar; | ||||||
| 587 | } else if (Context.UnwrapSimilarTypes(T1, T2)) { | ||||||
| 588 | Kind = CastAwayConstnessKind::CACK_Similar; | ||||||
| 589 | } else { | ||||||
| 590 | // Try unwrapping mismatching levels. | ||||||
| 591 | int T1Class = Classify(T1); | ||||||
| 592 | if (T1Class == None) | ||||||
| 593 | return CastAwayConstnessKind::CACK_None; | ||||||
| 594 | |||||||
| 595 | int T2Class = Classify(T2); | ||||||
| 596 | if (T2Class == None) | ||||||
| 597 | return CastAwayConstnessKind::CACK_None; | ||||||
| 598 | |||||||
| 599 | T1 = Unwrap(T1); | ||||||
| 600 | T2 = Unwrap(T2); | ||||||
| 601 | Kind = T1Class == T2Class ? CastAwayConstnessKind::CACK_SimilarKind | ||||||
| 602 | : CastAwayConstnessKind::CACK_Incoherent; | ||||||
| 603 | } | ||||||
| 604 | |||||||
| 605 | // We've unwrapped at least one level. If the resulting T1 is a (possibly | ||||||
| 606 | // multidimensional) array type, any qualifier on any matching layer of | ||||||
| 607 | // T2 is considered to correspond to T1. Decompose down to the element | ||||||
| 608 | // type of T1 so that we can compare properly. | ||||||
| 609 | while (true) { | ||||||
| 610 | Context.UnwrapSimilarArrayTypes(T1, T2); | ||||||
| 611 | |||||||
| 612 | if (Classify(T1) != Array) | ||||||
| 613 | break; | ||||||
| 614 | |||||||
| 615 | auto T2Class = Classify(T2); | ||||||
| 616 | if (T2Class == None) | ||||||
| 617 | break; | ||||||
| 618 | |||||||
| 619 | if (T2Class != Array) | ||||||
| 620 | Kind = CastAwayConstnessKind::CACK_Incoherent; | ||||||
| 621 | else if (Kind != CastAwayConstnessKind::CACK_Incoherent) | ||||||
| 622 | Kind = CastAwayConstnessKind::CACK_SimilarKind; | ||||||
| 623 | |||||||
| 624 | T1 = Unwrap(T1); | ||||||
| 625 | T2 = Unwrap(T2).withCVRQualifiers(T2.getCVRQualifiers()); | ||||||
| 626 | } | ||||||
| 627 | |||||||
| 628 | return Kind; | ||||||
| 629 | } | ||||||
| 630 | |||||||
| 631 | /// Check if the pointer conversion from SrcType to DestType casts away | ||||||
| 632 | /// constness as defined in C++ [expr.const.cast]. This is used by the cast | ||||||
| 633 | /// checkers. Both arguments must denote pointer (possibly to member) types. | ||||||
| 634 | /// | ||||||
| 635 | /// \param CheckCVR Whether to check for const/volatile/restrict qualifiers. | ||||||
| 636 | /// \param CheckObjCLifetime Whether to check Objective-C lifetime qualifiers. | ||||||
| 637 | static CastAwayConstnessKind | ||||||
| 638 | CastsAwayConstness(Sema &Self, QualType SrcType, QualType DestType, | ||||||
| 639 | bool CheckCVR, bool CheckObjCLifetime, | ||||||
| 640 | QualType *TheOffendingSrcType = nullptr, | ||||||
| 641 | QualType *TheOffendingDestType = nullptr, | ||||||
| 642 | Qualifiers *CastAwayQualifiers = nullptr) { | ||||||
| 643 | // If the only checking we care about is for Objective-C lifetime qualifiers, | ||||||
| 644 | // and we're not in ObjC mode, there's nothing to check. | ||||||
| 645 | if (!CheckCVR && CheckObjCLifetime && !Self.Context.getLangOpts().ObjC) | ||||||
| 646 | return CastAwayConstnessKind::CACK_None; | ||||||
| 647 | |||||||
| 648 | if (!DestType->isReferenceType()) { | ||||||
| 649 | assert((SrcType->isAnyPointerType() || SrcType->isMemberPointerType() ||(static_cast <bool> ((SrcType->isAnyPointerType() || SrcType->isMemberPointerType() || SrcType->isBlockPointerType ()) && "Source type is not pointer or pointer to member." ) ? void (0) : __assert_fail ("(SrcType->isAnyPointerType() || SrcType->isMemberPointerType() || SrcType->isBlockPointerType()) && \"Source type is not pointer or pointer to member.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 651, __extension__ __PRETTY_FUNCTION__)) | ||||||
| 650 | SrcType->isBlockPointerType()) &&(static_cast <bool> ((SrcType->isAnyPointerType() || SrcType->isMemberPointerType() || SrcType->isBlockPointerType ()) && "Source type is not pointer or pointer to member." ) ? void (0) : __assert_fail ("(SrcType->isAnyPointerType() || SrcType->isMemberPointerType() || SrcType->isBlockPointerType()) && \"Source type is not pointer or pointer to member.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 651, __extension__ __PRETTY_FUNCTION__)) | ||||||
| 651 | "Source type is not pointer or pointer to member.")(static_cast <bool> ((SrcType->isAnyPointerType() || SrcType->isMemberPointerType() || SrcType->isBlockPointerType ()) && "Source type is not pointer or pointer to member." ) ? void (0) : __assert_fail ("(SrcType->isAnyPointerType() || SrcType->isMemberPointerType() || SrcType->isBlockPointerType()) && \"Source type is not pointer or pointer to member.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 651, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 652 | assert((DestType->isAnyPointerType() || DestType->isMemberPointerType() ||(static_cast <bool> ((DestType->isAnyPointerType() || DestType->isMemberPointerType() || DestType->isBlockPointerType ()) && "Destination type is not pointer or pointer to member." ) ? void (0) : __assert_fail ("(DestType->isAnyPointerType() || DestType->isMemberPointerType() || DestType->isBlockPointerType()) && \"Destination type is not pointer or pointer to member.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 654, __extension__ __PRETTY_FUNCTION__)) | ||||||
| 653 | DestType->isBlockPointerType()) &&(static_cast <bool> ((DestType->isAnyPointerType() || DestType->isMemberPointerType() || DestType->isBlockPointerType ()) && "Destination type is not pointer or pointer to member." ) ? void (0) : __assert_fail ("(DestType->isAnyPointerType() || DestType->isMemberPointerType() || DestType->isBlockPointerType()) && \"Destination type is not pointer or pointer to member.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 654, __extension__ __PRETTY_FUNCTION__)) | ||||||
| 654 | "Destination type is not pointer or pointer to member.")(static_cast <bool> ((DestType->isAnyPointerType() || DestType->isMemberPointerType() || DestType->isBlockPointerType ()) && "Destination type is not pointer or pointer to member." ) ? void (0) : __assert_fail ("(DestType->isAnyPointerType() || DestType->isMemberPointerType() || DestType->isBlockPointerType()) && \"Destination type is not pointer or pointer to member.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 654, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 655 | } | ||||||
| 656 | |||||||
| 657 | QualType UnwrappedSrcType = Self.Context.getCanonicalType(SrcType), | ||||||
| 658 | UnwrappedDestType = Self.Context.getCanonicalType(DestType); | ||||||
| 659 | |||||||
| 660 | // Find the qualifiers. We only care about cvr-qualifiers for the | ||||||
| 661 | // purpose of this check, because other qualifiers (address spaces, | ||||||
| 662 | // Objective-C GC, etc.) are part of the type's identity. | ||||||
| 663 | QualType PrevUnwrappedSrcType = UnwrappedSrcType; | ||||||
| 664 | QualType PrevUnwrappedDestType = UnwrappedDestType; | ||||||
| 665 | auto WorstKind = CastAwayConstnessKind::CACK_Similar; | ||||||
| 666 | bool AllConstSoFar = true; | ||||||
| 667 | while (auto Kind = unwrapCastAwayConstnessLevel( | ||||||
| 668 | Self.Context, UnwrappedSrcType, UnwrappedDestType)) { | ||||||
| 669 | // Track the worst kind of unwrap we needed to do before we found a | ||||||
| 670 | // problem. | ||||||
| 671 | if (Kind > WorstKind) | ||||||
| 672 | WorstKind = Kind; | ||||||
| 673 | |||||||
| 674 | // Determine the relevant qualifiers at this level. | ||||||
| 675 | Qualifiers SrcQuals, DestQuals; | ||||||
| 676 | Self.Context.getUnqualifiedArrayType(UnwrappedSrcType, SrcQuals); | ||||||
| 677 | Self.Context.getUnqualifiedArrayType(UnwrappedDestType, DestQuals); | ||||||
| 678 | |||||||
| 679 | // We do not meaningfully track object const-ness of Objective-C object | ||||||
| 680 | // types. Remove const from the source type if either the source or | ||||||
| 681 | // the destination is an Objective-C object type. | ||||||
| 682 | if (UnwrappedSrcType->isObjCObjectType() || | ||||||
| 683 | UnwrappedDestType->isObjCObjectType()) | ||||||
| 684 | SrcQuals.removeConst(); | ||||||
| 685 | |||||||
| 686 | if (CheckCVR) { | ||||||
| 687 | Qualifiers SrcCvrQuals = | ||||||
| 688 | Qualifiers::fromCVRMask(SrcQuals.getCVRQualifiers()); | ||||||
| 689 | Qualifiers DestCvrQuals = | ||||||
| 690 | Qualifiers::fromCVRMask(DestQuals.getCVRQualifiers()); | ||||||
| 691 | |||||||
| 692 | if (SrcCvrQuals != DestCvrQuals) { | ||||||
| 693 | if (CastAwayQualifiers) | ||||||
| 694 | *CastAwayQualifiers = SrcCvrQuals - DestCvrQuals; | ||||||
| 695 | |||||||
| 696 | // If we removed a cvr-qualifier, this is casting away 'constness'. | ||||||
| 697 | if (!DestCvrQuals.compatiblyIncludes(SrcCvrQuals)) { | ||||||
| 698 | if (TheOffendingSrcType) | ||||||
| 699 | *TheOffendingSrcType = PrevUnwrappedSrcType; | ||||||
| 700 | if (TheOffendingDestType) | ||||||
| 701 | *TheOffendingDestType = PrevUnwrappedDestType; | ||||||
| 702 | return WorstKind; | ||||||
| 703 | } | ||||||
| 704 | |||||||
| 705 | // If any prior level was not 'const', this is also casting away | ||||||
| 706 | // 'constness'. We noted the outermost type missing a 'const' already. | ||||||
| 707 | if (!AllConstSoFar) | ||||||
| 708 | return WorstKind; | ||||||
| 709 | } | ||||||
| 710 | } | ||||||
| 711 | |||||||
| 712 | if (CheckObjCLifetime && | ||||||
| 713 | !DestQuals.compatiblyIncludesObjCLifetime(SrcQuals)) | ||||||
| 714 | return WorstKind; | ||||||
| 715 | |||||||
| 716 | // If we found our first non-const-qualified type, this may be the place | ||||||
| 717 | // where things start to go wrong. | ||||||
| 718 | if (AllConstSoFar && !DestQuals.hasConst()) { | ||||||
| 719 | AllConstSoFar = false; | ||||||
| 720 | if (TheOffendingSrcType) | ||||||
| 721 | *TheOffendingSrcType = PrevUnwrappedSrcType; | ||||||
| 722 | if (TheOffendingDestType) | ||||||
| 723 | *TheOffendingDestType = PrevUnwrappedDestType; | ||||||
| 724 | } | ||||||
| 725 | |||||||
| 726 | PrevUnwrappedSrcType = UnwrappedSrcType; | ||||||
| 727 | PrevUnwrappedDestType = UnwrappedDestType; | ||||||
| 728 | } | ||||||
| 729 | |||||||
| 730 | return CastAwayConstnessKind::CACK_None; | ||||||
| 731 | } | ||||||
| 732 | |||||||
| 733 | static TryCastResult getCastAwayConstnessCastKind(CastAwayConstnessKind CACK, | ||||||
| 734 | unsigned &DiagID) { | ||||||
| 735 | switch (CACK) { | ||||||
| 736 | case CastAwayConstnessKind::CACK_None: | ||||||
| 737 | llvm_unreachable("did not cast away constness")::llvm::llvm_unreachable_internal("did not cast away constness" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 737); | ||||||
| 738 | |||||||
| 739 | case CastAwayConstnessKind::CACK_Similar: | ||||||
| 740 | // FIXME: Accept these as an extension too? | ||||||
| 741 | case CastAwayConstnessKind::CACK_SimilarKind: | ||||||
| 742 | DiagID = diag::err_bad_cxx_cast_qualifiers_away; | ||||||
| 743 | return TC_Failed; | ||||||
| 744 | |||||||
| 745 | case CastAwayConstnessKind::CACK_Incoherent: | ||||||
| 746 | DiagID = diag::ext_bad_cxx_cast_qualifiers_away_incoherent; | ||||||
| 747 | return TC_Extension; | ||||||
| 748 | } | ||||||
| 749 | |||||||
| 750 | llvm_unreachable("unexpected cast away constness kind")::llvm::llvm_unreachable_internal("unexpected cast away constness kind" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 750); | ||||||
| 751 | } | ||||||
| 752 | |||||||
| 753 | /// CheckDynamicCast - Check that a dynamic_cast\<DestType\>(SrcExpr) is valid. | ||||||
| 754 | /// Refer to C++ 5.2.7 for details. Dynamic casts are used mostly for runtime- | ||||||
| 755 | /// checked downcasts in class hierarchies. | ||||||
| 756 | void CastOperation::CheckDynamicCast() { | ||||||
| 757 | CheckNoDerefRAII NoderefCheck(*this); | ||||||
| 758 | |||||||
| 759 | if (ValueKind == VK_PRValue) | ||||||
| 760 | SrcExpr = Self.DefaultFunctionArrayLvalueConversion(SrcExpr.get()); | ||||||
| 761 | else if (isPlaceholder()) | ||||||
| 762 | SrcExpr = Self.CheckPlaceholderExpr(SrcExpr.get()); | ||||||
| 763 | if (SrcExpr.isInvalid()) // if conversion failed, don't report another error | ||||||
| 764 | return; | ||||||
| 765 | |||||||
| 766 | QualType OrigSrcType = SrcExpr.get()->getType(); | ||||||
| 767 | QualType DestType = Self.Context.getCanonicalType(this->DestType); | ||||||
| 768 | |||||||
| 769 | // C++ 5.2.7p1: T shall be a pointer or reference to a complete class type, | ||||||
| 770 | // or "pointer to cv void". | ||||||
| 771 | |||||||
| 772 | QualType DestPointee; | ||||||
| 773 | const PointerType *DestPointer = DestType->getAs<PointerType>(); | ||||||
| 774 | const ReferenceType *DestReference = nullptr; | ||||||
| 775 | if (DestPointer) { | ||||||
| 776 | DestPointee = DestPointer->getPointeeType(); | ||||||
| 777 | } else if ((DestReference = DestType->getAs<ReferenceType>())) { | ||||||
| 778 | DestPointee = DestReference->getPointeeType(); | ||||||
| 779 | } else { | ||||||
| 780 | Self.Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_ref_or_ptr) | ||||||
| 781 | << this->DestType << DestRange; | ||||||
| 782 | SrcExpr = ExprError(); | ||||||
| 783 | return; | ||||||
| 784 | } | ||||||
| 785 | |||||||
| 786 | const RecordType *DestRecord = DestPointee->getAs<RecordType>(); | ||||||
| 787 | if (DestPointee->isVoidType()) { | ||||||
| 788 | assert(DestPointer && "Reference to void is not possible")(static_cast <bool> (DestPointer && "Reference to void is not possible" ) ? void (0) : __assert_fail ("DestPointer && \"Reference to void is not possible\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 788, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 789 | } else if (DestRecord) { | ||||||
| 790 | if (Self.RequireCompleteType(OpRange.getBegin(), DestPointee, | ||||||
| 791 | diag::err_bad_cast_incomplete, | ||||||
| 792 | DestRange)) { | ||||||
| 793 | SrcExpr = ExprError(); | ||||||
| 794 | return; | ||||||
| 795 | } | ||||||
| 796 | } else { | ||||||
| 797 | Self.Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_class) | ||||||
| 798 | << DestPointee.getUnqualifiedType() << DestRange; | ||||||
| 799 | SrcExpr = ExprError(); | ||||||
| 800 | return; | ||||||
| 801 | } | ||||||
| 802 | |||||||
| 803 | // C++0x 5.2.7p2: If T is a pointer type, v shall be an rvalue of a pointer to | ||||||
| 804 | // complete class type, [...]. If T is an lvalue reference type, v shall be | ||||||
| 805 | // an lvalue of a complete class type, [...]. If T is an rvalue reference | ||||||
| 806 | // type, v shall be an expression having a complete class type, [...] | ||||||
| 807 | QualType SrcType = Self.Context.getCanonicalType(OrigSrcType); | ||||||
| 808 | QualType SrcPointee; | ||||||
| 809 | if (DestPointer) { | ||||||
| 810 | if (const PointerType *SrcPointer = SrcType->getAs<PointerType>()) { | ||||||
| 811 | SrcPointee = SrcPointer->getPointeeType(); | ||||||
| 812 | } else { | ||||||
| 813 | Self.Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_ptr) | ||||||
| 814 | << OrigSrcType << this->DestType << SrcExpr.get()->getSourceRange(); | ||||||
| 815 | SrcExpr = ExprError(); | ||||||
| 816 | return; | ||||||
| 817 | } | ||||||
| 818 | } else if (DestReference->isLValueReferenceType()) { | ||||||
| 819 | if (!SrcExpr.get()->isLValue()) { | ||||||
| 820 | Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_rvalue) | ||||||
| 821 | << CT_Dynamic << OrigSrcType << this->DestType << OpRange; | ||||||
| 822 | } | ||||||
| 823 | SrcPointee = SrcType; | ||||||
| 824 | } else { | ||||||
| 825 | // If we're dynamic_casting from a prvalue to an rvalue reference, we need | ||||||
| 826 | // to materialize the prvalue before we bind the reference to it. | ||||||
| 827 | if (SrcExpr.get()->isPRValue()) | ||||||
| 828 | SrcExpr = Self.CreateMaterializeTemporaryExpr( | ||||||
| 829 | SrcType, SrcExpr.get(), /*IsLValueReference*/ false); | ||||||
| 830 | SrcPointee = SrcType; | ||||||
| 831 | } | ||||||
| 832 | |||||||
| 833 | const RecordType *SrcRecord = SrcPointee->getAs<RecordType>(); | ||||||
| 834 | if (SrcRecord) { | ||||||
| 835 | if (Self.RequireCompleteType(OpRange.getBegin(), SrcPointee, | ||||||
| 836 | diag::err_bad_cast_incomplete, | ||||||
| 837 | SrcExpr.get())) { | ||||||
| 838 | SrcExpr = ExprError(); | ||||||
| 839 | return; | ||||||
| 840 | } | ||||||
| 841 | } else { | ||||||
| 842 | Self.Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_class) | ||||||
| 843 | << SrcPointee.getUnqualifiedType() << SrcExpr.get()->getSourceRange(); | ||||||
| 844 | SrcExpr = ExprError(); | ||||||
| 845 | return; | ||||||
| 846 | } | ||||||
| 847 | |||||||
| 848 | assert((DestPointer || DestReference) &&(static_cast <bool> ((DestPointer || DestReference) && "Bad destination non-ptr/ref slipped through.") ? void (0) : __assert_fail ("(DestPointer || DestReference) && \"Bad destination non-ptr/ref slipped through.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 849, __extension__ __PRETTY_FUNCTION__)) | ||||||
| 849 | "Bad destination non-ptr/ref slipped through.")(static_cast <bool> ((DestPointer || DestReference) && "Bad destination non-ptr/ref slipped through.") ? void (0) : __assert_fail ("(DestPointer || DestReference) && \"Bad destination non-ptr/ref slipped through.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 849, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 850 | assert((DestRecord || DestPointee->isVoidType()) &&(static_cast <bool> ((DestRecord || DestPointee->isVoidType ()) && "Bad destination pointee slipped through.") ? void (0) : __assert_fail ("(DestRecord || DestPointee->isVoidType()) && \"Bad destination pointee slipped through.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 851, __extension__ __PRETTY_FUNCTION__)) | ||||||
| 851 | "Bad destination pointee slipped through.")(static_cast <bool> ((DestRecord || DestPointee->isVoidType ()) && "Bad destination pointee slipped through.") ? void (0) : __assert_fail ("(DestRecord || DestPointee->isVoidType()) && \"Bad destination pointee slipped through.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 851, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 852 | assert(SrcRecord && "Bad source pointee slipped through.")(static_cast <bool> (SrcRecord && "Bad source pointee slipped through." ) ? void (0) : __assert_fail ("SrcRecord && \"Bad source pointee slipped through.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 852, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 853 | |||||||
| 854 | // C++ 5.2.7p1: The dynamic_cast operator shall not cast away constness. | ||||||
| 855 | if (!DestPointee.isAtLeastAsQualifiedAs(SrcPointee)) { | ||||||
| 856 | Self.Diag(OpRange.getBegin(), diag::err_bad_cxx_cast_qualifiers_away) | ||||||
| 857 | << CT_Dynamic << OrigSrcType << this->DestType << OpRange; | ||||||
| 858 | SrcExpr = ExprError(); | ||||||
| 859 | return; | ||||||
| 860 | } | ||||||
| 861 | |||||||
| 862 | // C++ 5.2.7p3: If the type of v is the same as the required result type, | ||||||
| 863 | // [except for cv]. | ||||||
| 864 | if (DestRecord == SrcRecord) { | ||||||
| 865 | Kind = CK_NoOp; | ||||||
| 866 | return; | ||||||
| 867 | } | ||||||
| 868 | |||||||
| 869 | // C++ 5.2.7p5 | ||||||
| 870 | // Upcasts are resolved statically. | ||||||
| 871 | if (DestRecord && | ||||||
| 872 | Self.IsDerivedFrom(OpRange.getBegin(), SrcPointee, DestPointee)) { | ||||||
| 873 | if (Self.CheckDerivedToBaseConversion(SrcPointee, DestPointee, | ||||||
| 874 | OpRange.getBegin(), OpRange, | ||||||
| 875 | &BasePath)) { | ||||||
| 876 | SrcExpr = ExprError(); | ||||||
| 877 | return; | ||||||
| 878 | } | ||||||
| 879 | |||||||
| 880 | Kind = CK_DerivedToBase; | ||||||
| 881 | return; | ||||||
| 882 | } | ||||||
| 883 | |||||||
| 884 | // C++ 5.2.7p6: Otherwise, v shall be [polymorphic]. | ||||||
| 885 | const RecordDecl *SrcDecl = SrcRecord->getDecl()->getDefinition(); | ||||||
| 886 | assert(SrcDecl && "Definition missing")(static_cast <bool> (SrcDecl && "Definition missing" ) ? void (0) : __assert_fail ("SrcDecl && \"Definition missing\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 886, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 887 | if (!cast<CXXRecordDecl>(SrcDecl)->isPolymorphic()) { | ||||||
| 888 | Self.Diag(OpRange.getBegin(), diag::err_bad_dynamic_cast_not_polymorphic) | ||||||
| 889 | << SrcPointee.getUnqualifiedType() << SrcExpr.get()->getSourceRange(); | ||||||
| 890 | SrcExpr = ExprError(); | ||||||
| 891 | } | ||||||
| 892 | |||||||
| 893 | // dynamic_cast is not available with -fno-rtti. | ||||||
| 894 | // As an exception, dynamic_cast to void* is available because it doesn't | ||||||
| 895 | // use RTTI. | ||||||
| 896 | if (!Self.getLangOpts().RTTI && !DestPointee->isVoidType()) { | ||||||
| 897 | Self.Diag(OpRange.getBegin(), diag::err_no_dynamic_cast_with_fno_rtti); | ||||||
| 898 | SrcExpr = ExprError(); | ||||||
| 899 | return; | ||||||
| 900 | } | ||||||
| 901 | |||||||
| 902 | // Warns when dynamic_cast is used with RTTI data disabled. | ||||||
| 903 | if (!Self.getLangOpts().RTTIData) { | ||||||
| 904 | bool MicrosoftABI = | ||||||
| 905 | Self.getASTContext().getTargetInfo().getCXXABI().isMicrosoft(); | ||||||
| 906 | bool isClangCL = Self.getDiagnostics().getDiagnosticOptions().getFormat() == | ||||||
| 907 | DiagnosticOptions::MSVC; | ||||||
| 908 | if (MicrosoftABI || !DestPointee->isVoidType()) | ||||||
| 909 | Self.Diag(OpRange.getBegin(), | ||||||
| 910 | diag::warn_no_dynamic_cast_with_rtti_disabled) | ||||||
| 911 | << isClangCL; | ||||||
| 912 | } | ||||||
| 913 | |||||||
| 914 | // Done. Everything else is run-time checks. | ||||||
| 915 | Kind = CK_Dynamic; | ||||||
| 916 | } | ||||||
| 917 | |||||||
| 918 | /// CheckConstCast - Check that a const_cast\<DestType\>(SrcExpr) is valid. | ||||||
| 919 | /// Refer to C++ 5.2.11 for details. const_cast is typically used in code | ||||||
| 920 | /// like this: | ||||||
| 921 | /// const char *str = "literal"; | ||||||
| 922 | /// legacy_function(const_cast\<char*\>(str)); | ||||||
| 923 | void CastOperation::CheckConstCast() { | ||||||
| 924 | CheckNoDerefRAII NoderefCheck(*this); | ||||||
| 925 | |||||||
| 926 | if (ValueKind == VK_PRValue) | ||||||
| 927 | SrcExpr = Self.DefaultFunctionArrayLvalueConversion(SrcExpr.get()); | ||||||
| 928 | else if (isPlaceholder()) | ||||||
| 929 | SrcExpr = Self.CheckPlaceholderExpr(SrcExpr.get()); | ||||||
| 930 | if (SrcExpr.isInvalid()) // if conversion failed, don't report another error | ||||||
| 931 | return; | ||||||
| 932 | |||||||
| 933 | unsigned msg = diag::err_bad_cxx_cast_generic; | ||||||
| 934 | auto TCR = TryConstCast(Self, SrcExpr, DestType, /*CStyle*/ false, msg); | ||||||
| 935 | if (TCR != TC_Success && msg != 0) { | ||||||
| 936 | Self.Diag(OpRange.getBegin(), msg) << CT_Const | ||||||
| 937 | << SrcExpr.get()->getType() << DestType << OpRange; | ||||||
| 938 | } | ||||||
| 939 | if (!isValidCast(TCR)) | ||||||
| 940 | SrcExpr = ExprError(); | ||||||
| 941 | } | ||||||
| 942 | |||||||
| 943 | void CastOperation::CheckAddrspaceCast() { | ||||||
| 944 | unsigned msg = diag::err_bad_cxx_cast_generic; | ||||||
| 945 | auto TCR = | ||||||
| 946 | TryAddressSpaceCast(Self, SrcExpr, DestType, /*CStyle*/ false, msg, Kind); | ||||||
| 947 | if (TCR != TC_Success && msg != 0) { | ||||||
| 948 | Self.Diag(OpRange.getBegin(), msg) | ||||||
| 949 | << CT_Addrspace << SrcExpr.get()->getType() << DestType << OpRange; | ||||||
| 950 | } | ||||||
| 951 | if (!isValidCast(TCR)) | ||||||
| 952 | SrcExpr = ExprError(); | ||||||
| 953 | } | ||||||
| 954 | |||||||
| 955 | /// Check that a reinterpret_cast\<DestType\>(SrcExpr) is not used as upcast | ||||||
| 956 | /// or downcast between respective pointers or references. | ||||||
| 957 | static void DiagnoseReinterpretUpDownCast(Sema &Self, const Expr *SrcExpr, | ||||||
| 958 | QualType DestType, | ||||||
| 959 | SourceRange OpRange) { | ||||||
| 960 | QualType SrcType = SrcExpr->getType(); | ||||||
| 961 | // When casting from pointer or reference, get pointee type; use original | ||||||
| 962 | // type otherwise. | ||||||
| 963 | const CXXRecordDecl *SrcPointeeRD = SrcType->getPointeeCXXRecordDecl(); | ||||||
| 964 | const CXXRecordDecl *SrcRD = | ||||||
| 965 | SrcPointeeRD ? SrcPointeeRD : SrcType->getAsCXXRecordDecl(); | ||||||
| 966 | |||||||
| 967 | // Examining subobjects for records is only possible if the complete and | ||||||
| 968 | // valid definition is available. Also, template instantiation is not | ||||||
| 969 | // allowed here. | ||||||
| 970 | if (!SrcRD || !SrcRD->isCompleteDefinition() || SrcRD->isInvalidDecl()) | ||||||
| 971 | return; | ||||||
| 972 | |||||||
| 973 | const CXXRecordDecl *DestRD = DestType->getPointeeCXXRecordDecl(); | ||||||
| 974 | |||||||
| 975 | if (!DestRD || !DestRD->isCompleteDefinition() || DestRD->isInvalidDecl()) | ||||||
| 976 | return; | ||||||
| 977 | |||||||
| 978 | enum { | ||||||
| 979 | ReinterpretUpcast, | ||||||
| 980 | ReinterpretDowncast | ||||||
| 981 | } ReinterpretKind; | ||||||
| 982 | |||||||
| 983 | CXXBasePaths BasePaths; | ||||||
| 984 | |||||||
| 985 | if (SrcRD->isDerivedFrom(DestRD, BasePaths)) | ||||||
| 986 | ReinterpretKind = ReinterpretUpcast; | ||||||
| 987 | else if (DestRD->isDerivedFrom(SrcRD, BasePaths)) | ||||||
| 988 | ReinterpretKind = ReinterpretDowncast; | ||||||
| 989 | else | ||||||
| 990 | return; | ||||||
| 991 | |||||||
| 992 | bool VirtualBase = true; | ||||||
| 993 | bool NonZeroOffset = false; | ||||||
| 994 | for (CXXBasePaths::const_paths_iterator I = BasePaths.begin(), | ||||||
| 995 | E = BasePaths.end(); | ||||||
| 996 | I != E; ++I) { | ||||||
| 997 | const CXXBasePath &Path = *I; | ||||||
| 998 | CharUnits Offset = CharUnits::Zero(); | ||||||
| 999 | bool IsVirtual = false; | ||||||
| 1000 | for (CXXBasePath::const_iterator IElem = Path.begin(), EElem = Path.end(); | ||||||
| 1001 | IElem != EElem; ++IElem) { | ||||||
| 1002 | IsVirtual = IElem->Base->isVirtual(); | ||||||
| 1003 | if (IsVirtual) | ||||||
| 1004 | break; | ||||||
| 1005 | const CXXRecordDecl *BaseRD = IElem->Base->getType()->getAsCXXRecordDecl(); | ||||||
| 1006 | assert(BaseRD && "Base type should be a valid unqualified class type")(static_cast <bool> (BaseRD && "Base type should be a valid unqualified class type" ) ? void (0) : __assert_fail ("BaseRD && \"Base type should be a valid unqualified class type\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 1006, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 1007 | // Don't check if any base has invalid declaration or has no definition | ||||||
| 1008 | // since it has no layout info. | ||||||
| 1009 | const CXXRecordDecl *Class = IElem->Class, | ||||||
| 1010 | *ClassDefinition = Class->getDefinition(); | ||||||
| 1011 | if (Class->isInvalidDecl() || !ClassDefinition || | ||||||
| 1012 | !ClassDefinition->isCompleteDefinition()) | ||||||
| 1013 | return; | ||||||
| 1014 | |||||||
| 1015 | const ASTRecordLayout &DerivedLayout = | ||||||
| 1016 | Self.Context.getASTRecordLayout(Class); | ||||||
| 1017 | Offset += DerivedLayout.getBaseClassOffset(BaseRD); | ||||||
| 1018 | } | ||||||
| 1019 | if (!IsVirtual) { | ||||||
| 1020 | // Don't warn if any path is a non-virtually derived base at offset zero. | ||||||
| 1021 | if (Offset.isZero()) | ||||||
| 1022 | return; | ||||||
| 1023 | // Offset makes sense only for non-virtual bases. | ||||||
| 1024 | else | ||||||
| 1025 | NonZeroOffset = true; | ||||||
| 1026 | } | ||||||
| 1027 | VirtualBase = VirtualBase && IsVirtual; | ||||||
| 1028 | } | ||||||
| 1029 | |||||||
| 1030 | (void) NonZeroOffset; // Silence set but not used warning. | ||||||
| 1031 | assert((VirtualBase || NonZeroOffset) &&(static_cast <bool> ((VirtualBase || NonZeroOffset) && "Should have returned if has non-virtual base with zero offset" ) ? void (0) : __assert_fail ("(VirtualBase || NonZeroOffset) && \"Should have returned if has non-virtual base with zero offset\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 1032, __extension__ __PRETTY_FUNCTION__)) | ||||||
| 1032 | "Should have returned if has non-virtual base with zero offset")(static_cast <bool> ((VirtualBase || NonZeroOffset) && "Should have returned if has non-virtual base with zero offset" ) ? void (0) : __assert_fail ("(VirtualBase || NonZeroOffset) && \"Should have returned if has non-virtual base with zero offset\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 1032, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 1033 | |||||||
| 1034 | QualType BaseType = | ||||||
| 1035 | ReinterpretKind == ReinterpretUpcast? DestType : SrcType; | ||||||
| 1036 | QualType DerivedType = | ||||||
| 1037 | ReinterpretKind == ReinterpretUpcast? SrcType : DestType; | ||||||
| 1038 | |||||||
| 1039 | SourceLocation BeginLoc = OpRange.getBegin(); | ||||||
| 1040 | Self.Diag(BeginLoc, diag::warn_reinterpret_different_from_static) | ||||||
| 1041 | << DerivedType << BaseType << !VirtualBase << int(ReinterpretKind) | ||||||
| 1042 | << OpRange; | ||||||
| 1043 | Self.Diag(BeginLoc, diag::note_reinterpret_updowncast_use_static) | ||||||
| 1044 | << int(ReinterpretKind) | ||||||
| 1045 | << FixItHint::CreateReplacement(BeginLoc, "static_cast"); | ||||||
| 1046 | } | ||||||
| 1047 | |||||||
| 1048 | static bool argTypeIsABIEquivalent(QualType SrcType, QualType DestType, | ||||||
| 1049 | ASTContext &Context) { | ||||||
| 1050 | if (SrcType->isPointerType() && DestType->isPointerType()) | ||||||
| 1051 | return true; | ||||||
| 1052 | |||||||
| 1053 | // Allow integral type mismatch if their size are equal. | ||||||
| 1054 | if (SrcType->isIntegralType(Context) && DestType->isIntegralType(Context)) | ||||||
| 1055 | if (Context.getTypeInfoInChars(SrcType).Width == | ||||||
| 1056 | Context.getTypeInfoInChars(DestType).Width) | ||||||
| 1057 | return true; | ||||||
| 1058 | |||||||
| 1059 | return Context.hasSameUnqualifiedType(SrcType, DestType); | ||||||
| 1060 | } | ||||||
| 1061 | |||||||
| 1062 | static bool checkCastFunctionType(Sema &Self, const ExprResult &SrcExpr, | ||||||
| 1063 | QualType DestType) { | ||||||
| 1064 | if (Self.Diags.isIgnored(diag::warn_cast_function_type, | ||||||
| 1065 | SrcExpr.get()->getExprLoc())) | ||||||
| 1066 | return true; | ||||||
| 1067 | |||||||
| 1068 | QualType SrcType = SrcExpr.get()->getType(); | ||||||
| 1069 | const FunctionType *SrcFTy = nullptr; | ||||||
| 1070 | const FunctionType *DstFTy = nullptr; | ||||||
| 1071 | if (((SrcType->isBlockPointerType() || SrcType->isFunctionPointerType()) && | ||||||
| 1072 | DestType->isFunctionPointerType()) || | ||||||
| 1073 | (SrcType->isMemberFunctionPointerType() && | ||||||
| 1074 | DestType->isMemberFunctionPointerType())) { | ||||||
| 1075 | SrcFTy = SrcType->getPointeeType()->castAs<FunctionType>(); | ||||||
| 1076 | DstFTy = DestType->getPointeeType()->castAs<FunctionType>(); | ||||||
| 1077 | } else if (SrcType->isFunctionType() && DestType->isFunctionReferenceType()) { | ||||||
| 1078 | SrcFTy = SrcType->castAs<FunctionType>(); | ||||||
| 1079 | DstFTy = DestType.getNonReferenceType()->castAs<FunctionType>(); | ||||||
| 1080 | } else { | ||||||
| 1081 | return true; | ||||||
| 1082 | } | ||||||
| 1083 | assert(SrcFTy && DstFTy)(static_cast <bool> (SrcFTy && DstFTy) ? void ( 0) : __assert_fail ("SrcFTy && DstFTy", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 1083, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 1084 | |||||||
| 1085 | auto IsVoidVoid = [](const FunctionType *T) { | ||||||
| 1086 | if (!T->getReturnType()->isVoidType()) | ||||||
| 1087 | return false; | ||||||
| 1088 | if (const auto *PT = T->getAs<FunctionProtoType>()) | ||||||
| 1089 | return !PT->isVariadic() && PT->getNumParams() == 0; | ||||||
| 1090 | return false; | ||||||
| 1091 | }; | ||||||
| 1092 | |||||||
| 1093 | // Skip if either function type is void(*)(void) | ||||||
| 1094 | if (IsVoidVoid(SrcFTy) || IsVoidVoid(DstFTy)) | ||||||
| 1095 | return true; | ||||||
| 1096 | |||||||
| 1097 | // Check return type. | ||||||
| 1098 | if (!argTypeIsABIEquivalent(SrcFTy->getReturnType(), DstFTy->getReturnType(), | ||||||
| 1099 | Self.Context)) | ||||||
| 1100 | return false; | ||||||
| 1101 | |||||||
| 1102 | // Check if either has unspecified number of parameters | ||||||
| 1103 | if (SrcFTy->isFunctionNoProtoType() || DstFTy->isFunctionNoProtoType()) | ||||||
| 1104 | return true; | ||||||
| 1105 | |||||||
| 1106 | // Check parameter types. | ||||||
| 1107 | |||||||
| 1108 | const auto *SrcFPTy = cast<FunctionProtoType>(SrcFTy); | ||||||
| 1109 | const auto *DstFPTy = cast<FunctionProtoType>(DstFTy); | ||||||
| 1110 | |||||||
| 1111 | // In a cast involving function types with a variable argument list only the | ||||||
| 1112 | // types of initial arguments that are provided are considered. | ||||||
| 1113 | unsigned NumParams = SrcFPTy->getNumParams(); | ||||||
| 1114 | unsigned DstNumParams = DstFPTy->getNumParams(); | ||||||
| 1115 | if (NumParams > DstNumParams) { | ||||||
| 1116 | if (!DstFPTy->isVariadic()) | ||||||
| 1117 | return false; | ||||||
| 1118 | NumParams = DstNumParams; | ||||||
| 1119 | } else if (NumParams < DstNumParams) { | ||||||
| 1120 | if (!SrcFPTy->isVariadic()) | ||||||
| 1121 | return false; | ||||||
| 1122 | } | ||||||
| 1123 | |||||||
| 1124 | for (unsigned i = 0; i < NumParams; ++i) | ||||||
| 1125 | if (!argTypeIsABIEquivalent(SrcFPTy->getParamType(i), | ||||||
| 1126 | DstFPTy->getParamType(i), Self.Context)) | ||||||
| 1127 | return false; | ||||||
| 1128 | |||||||
| 1129 | return true; | ||||||
| 1130 | } | ||||||
| 1131 | |||||||
| 1132 | /// CheckReinterpretCast - Check that a reinterpret_cast\<DestType\>(SrcExpr) is | ||||||
| 1133 | /// valid. | ||||||
| 1134 | /// Refer to C++ 5.2.10 for details. reinterpret_cast is typically used in code | ||||||
| 1135 | /// like this: | ||||||
| 1136 | /// char *bytes = reinterpret_cast\<char*\>(int_ptr); | ||||||
| 1137 | void CastOperation::CheckReinterpretCast() { | ||||||
| 1138 | if (ValueKind == VK_PRValue && !isPlaceholder(BuiltinType::Overload)) | ||||||
| 1139 | SrcExpr = Self.DefaultFunctionArrayLvalueConversion(SrcExpr.get()); | ||||||
| 1140 | else | ||||||
| 1141 | checkNonOverloadPlaceholders(); | ||||||
| 1142 | if (SrcExpr.isInvalid()) // if conversion failed, don't report another error | ||||||
| 1143 | return; | ||||||
| 1144 | |||||||
| 1145 | unsigned msg = diag::err_bad_cxx_cast_generic; | ||||||
| 1146 | TryCastResult tcr = | ||||||
| 1147 | TryReinterpretCast(Self, SrcExpr, DestType, | ||||||
| 1148 | /*CStyle*/false, OpRange, msg, Kind); | ||||||
| 1149 | if (tcr != TC_Success && msg != 0) { | ||||||
| 1150 | if (SrcExpr.isInvalid()) // if conversion failed, don't report another error | ||||||
| 1151 | return; | ||||||
| 1152 | if (SrcExpr.get()->getType() == Self.Context.OverloadTy) { | ||||||
| 1153 | //FIXME: &f<int>; is overloaded and resolvable | ||||||
| 1154 | Self.Diag(OpRange.getBegin(), diag::err_bad_reinterpret_cast_overload) | ||||||
| 1155 | << OverloadExpr::find(SrcExpr.get()).Expression->getName() | ||||||
| 1156 | << DestType << OpRange; | ||||||
| 1157 | Self.NoteAllOverloadCandidates(SrcExpr.get()); | ||||||
| 1158 | |||||||
| 1159 | } else { | ||||||
| 1160 | diagnoseBadCast(Self, msg, CT_Reinterpret, OpRange, SrcExpr.get(), | ||||||
| 1161 | DestType, /*listInitialization=*/false); | ||||||
| 1162 | } | ||||||
| 1163 | } | ||||||
| 1164 | |||||||
| 1165 | if (isValidCast(tcr)) { | ||||||
| 1166 | if (Self.getLangOpts().allowsNonTrivialObjCLifetimeQualifiers()) | ||||||
| 1167 | checkObjCConversion(Sema::CCK_OtherCast); | ||||||
| 1168 | DiagnoseReinterpretUpDownCast(Self, SrcExpr.get(), DestType, OpRange); | ||||||
| 1169 | |||||||
| 1170 | if (!checkCastFunctionType(Self, SrcExpr, DestType)) | ||||||
| 1171 | Self.Diag(OpRange.getBegin(), diag::warn_cast_function_type) | ||||||
| 1172 | << SrcExpr.get()->getType() << DestType << OpRange; | ||||||
| 1173 | } else { | ||||||
| 1174 | SrcExpr = ExprError(); | ||||||
| 1175 | } | ||||||
| 1176 | } | ||||||
| 1177 | |||||||
| 1178 | |||||||
| 1179 | /// CheckStaticCast - Check that a static_cast\<DestType\>(SrcExpr) is valid. | ||||||
| 1180 | /// Refer to C++ 5.2.9 for details. Static casts are mostly used for making | ||||||
| 1181 | /// implicit conversions explicit and getting rid of data loss warnings. | ||||||
| 1182 | void CastOperation::CheckStaticCast() { | ||||||
| 1183 | CheckNoDerefRAII NoderefCheck(*this); | ||||||
| 1184 | |||||||
| 1185 | if (isPlaceholder()) { | ||||||
| |||||||
| 1186 | checkNonOverloadPlaceholders(); | ||||||
| 1187 | if (SrcExpr.isInvalid()) | ||||||
| 1188 | return; | ||||||
| 1189 | } | ||||||
| 1190 | |||||||
| 1191 | // This test is outside everything else because it's the only case where | ||||||
| 1192 | // a non-lvalue-reference target type does not lead to decay. | ||||||
| 1193 | // C++ 5.2.9p4: Any expression can be explicitly converted to type "cv void". | ||||||
| 1194 | if (DestType->isVoidType()) { | ||||||
| 1195 | Kind = CK_ToVoid; | ||||||
| 1196 | |||||||
| 1197 | if (claimPlaceholder(BuiltinType::Overload)) { | ||||||
| 1198 | Self.ResolveAndFixSingleFunctionTemplateSpecialization(SrcExpr, | ||||||
| 1199 | false, // Decay Function to ptr | ||||||
| 1200 | true, // Complain | ||||||
| 1201 | OpRange, DestType, diag::err_bad_static_cast_overload); | ||||||
| 1202 | if (SrcExpr.isInvalid()) | ||||||
| 1203 | return; | ||||||
| 1204 | } | ||||||
| 1205 | |||||||
| 1206 | SrcExpr = Self.IgnoredValueConversions(SrcExpr.get()); | ||||||
| 1207 | return; | ||||||
| 1208 | } | ||||||
| 1209 | |||||||
| 1210 | if (ValueKind == VK_PRValue && !DestType->isRecordType() && | ||||||
| 1211 | !isPlaceholder(BuiltinType::Overload)) { | ||||||
| 1212 | SrcExpr = Self.DefaultFunctionArrayLvalueConversion(SrcExpr.get()); | ||||||
| 1213 | if (SrcExpr.isInvalid()) // if conversion failed, don't report another error | ||||||
| 1214 | return; | ||||||
| 1215 | } | ||||||
| 1216 | |||||||
| 1217 | unsigned msg = diag::err_bad_cxx_cast_generic; | ||||||
| 1218 | TryCastResult tcr | ||||||
| 1219 | = TryStaticCast(Self, SrcExpr, DestType, Sema::CCK_OtherCast, OpRange, msg, | ||||||
| 1220 | Kind, BasePath, /*ListInitialization=*/false); | ||||||
| 1221 | if (tcr != TC_Success && msg != 0) { | ||||||
| 1222 | if (SrcExpr.isInvalid()) | ||||||
| 1223 | return; | ||||||
| 1224 | if (SrcExpr.get()->getType() == Self.Context.OverloadTy) { | ||||||
| 1225 | OverloadExpr* oe = OverloadExpr::find(SrcExpr.get()).Expression; | ||||||
| 1226 | Self.Diag(OpRange.getBegin(), diag::err_bad_static_cast_overload) | ||||||
| 1227 | << oe->getName() << DestType << OpRange | ||||||
| 1228 | << oe->getQualifierLoc().getSourceRange(); | ||||||
| 1229 | Self.NoteAllOverloadCandidates(SrcExpr.get()); | ||||||
| 1230 | } else { | ||||||
| 1231 | diagnoseBadCast(Self, msg, CT_Static, OpRange, SrcExpr.get(), DestType, | ||||||
| 1232 | /*listInitialization=*/false); | ||||||
| 1233 | } | ||||||
| 1234 | } | ||||||
| 1235 | |||||||
| 1236 | if (isValidCast(tcr)) { | ||||||
| 1237 | if (Kind == CK_BitCast) | ||||||
| 1238 | checkCastAlign(); | ||||||
| 1239 | if (Self.getLangOpts().allowsNonTrivialObjCLifetimeQualifiers()) | ||||||
| 1240 | checkObjCConversion(Sema::CCK_OtherCast); | ||||||
| 1241 | } else { | ||||||
| 1242 | SrcExpr = ExprError(); | ||||||
| 1243 | } | ||||||
| 1244 | } | ||||||
| 1245 | |||||||
| 1246 | static bool IsAddressSpaceConversion(QualType SrcType, QualType DestType) { | ||||||
| 1247 | auto *SrcPtrType = SrcType->getAs<PointerType>(); | ||||||
| 1248 | if (!SrcPtrType) | ||||||
| 1249 | return false; | ||||||
| 1250 | auto *DestPtrType = DestType->getAs<PointerType>(); | ||||||
| 1251 | if (!DestPtrType) | ||||||
| 1252 | return false; | ||||||
| 1253 | return SrcPtrType->getPointeeType().getAddressSpace() != | ||||||
| 1254 | DestPtrType->getPointeeType().getAddressSpace(); | ||||||
| 1255 | } | ||||||
| 1256 | |||||||
| 1257 | /// TryStaticCast - Check if a static cast can be performed, and do so if | ||||||
| 1258 | /// possible. If @p CStyle, ignore access restrictions on hierarchy casting | ||||||
| 1259 | /// and casting away constness. | ||||||
| 1260 | static TryCastResult TryStaticCast(Sema &Self, ExprResult &SrcExpr, | ||||||
| 1261 | QualType DestType, | ||||||
| 1262 | Sema::CheckedConversionKind CCK, | ||||||
| 1263 | SourceRange OpRange, unsigned &msg, | ||||||
| 1264 | CastKind &Kind, CXXCastPath &BasePath, | ||||||
| 1265 | bool ListInitialization) { | ||||||
| 1266 | // Determine whether we have the semantics of a C-style cast. | ||||||
| 1267 | bool CStyle | ||||||
| 1268 | = (CCK
| ||||||
| 1269 | |||||||
| 1270 | // The order the tests is not entirely arbitrary. There is one conversion | ||||||
| 1271 | // that can be handled in two different ways. Given: | ||||||
| 1272 | // struct A {}; | ||||||
| 1273 | // struct B : public A { | ||||||
| 1274 | // B(); B(const A&); | ||||||
| 1275 | // }; | ||||||
| 1276 | // const A &a = B(); | ||||||
| 1277 | // the cast static_cast<const B&>(a) could be seen as either a static | ||||||
| 1278 | // reference downcast, or an explicit invocation of the user-defined | ||||||
| 1279 | // conversion using B's conversion constructor. | ||||||
| 1280 | // DR 427 specifies that the downcast is to be applied here. | ||||||
| 1281 | |||||||
| 1282 | // C++ 5.2.9p4: Any expression can be explicitly converted to type "cv void". | ||||||
| 1283 | // Done outside this function. | ||||||
| 1284 | |||||||
| 1285 | TryCastResult tcr; | ||||||
| 1286 | |||||||
| 1287 | // C++ 5.2.9p5, reference downcast. | ||||||
| 1288 | // See the function for details. | ||||||
| 1289 | // DR 427 specifies that this is to be applied before paragraph 2. | ||||||
| 1290 | tcr = TryStaticReferenceDowncast(Self, SrcExpr.get(), DestType, CStyle, | ||||||
| 1291 | OpRange, msg, Kind, BasePath); | ||||||
| 1292 | if (tcr
| ||||||
| 1293 | return tcr; | ||||||
| 1294 | |||||||
| 1295 | // C++11 [expr.static.cast]p3: | ||||||
| 1296 | // A glvalue of type "cv1 T1" can be cast to type "rvalue reference to cv2 | ||||||
| 1297 | // T2" if "cv2 T2" is reference-compatible with "cv1 T1". | ||||||
| 1298 | tcr = TryLValueToRValueCast(Self, SrcExpr.get(), DestType, CStyle, Kind, | ||||||
| 1299 | BasePath, msg); | ||||||
| 1300 | if (tcr
| ||||||
| 1301 | return tcr; | ||||||
| 1302 | |||||||
| 1303 | // C++ 5.2.9p2: An expression e can be explicitly converted to a type T | ||||||
| 1304 | // [...] if the declaration "T t(e);" is well-formed, [...]. | ||||||
| 1305 | tcr = TryStaticImplicitCast(Self, SrcExpr, DestType, CCK, OpRange, msg, | ||||||
| 1306 | Kind, ListInitialization); | ||||||
| 1307 | if (SrcExpr.isInvalid()) | ||||||
| 1308 | return TC_Failed; | ||||||
| 1309 | if (tcr
| ||||||
| 1310 | return tcr; | ||||||
| 1311 | |||||||
| 1312 | // C++ 5.2.9p6: May apply the reverse of any standard conversion, except | ||||||
| 1313 | // lvalue-to-rvalue, array-to-pointer, function-to-pointer, and boolean | ||||||
| 1314 | // conversions, subject to further restrictions. | ||||||
| 1315 | // Also, C++ 5.2.9p1 forbids casting away constness, which makes reversal | ||||||
| 1316 | // of qualification conversions impossible. | ||||||
| 1317 | // In the CStyle case, the earlier attempt to const_cast should have taken | ||||||
| 1318 | // care of reverse qualification conversions. | ||||||
| 1319 | |||||||
| 1320 | QualType SrcType = Self.Context.getCanonicalType(SrcExpr.get()->getType()); | ||||||
| 1321 | |||||||
| 1322 | // C++0x 5.2.9p9: A value of a scoped enumeration type can be explicitly | ||||||
| 1323 | // converted to an integral type. [...] A value of a scoped enumeration type | ||||||
| 1324 | // can also be explicitly converted to a floating-point type [...]. | ||||||
| 1325 | if (const EnumType *Enum
| ||||||
| 1326 | if (Enum->getDecl()->isScoped()) { | ||||||
| 1327 | if (DestType->isBooleanType()) { | ||||||
| 1328 | Kind = CK_IntegralToBoolean; | ||||||
| 1329 | return TC_Success; | ||||||
| 1330 | } else if (DestType->isIntegralType(Self.Context)) { | ||||||
| 1331 | Kind = CK_IntegralCast; | ||||||
| 1332 | return TC_Success; | ||||||
| 1333 | } else if (DestType->isRealFloatingType()) { | ||||||
| 1334 | Kind = CK_IntegralToFloating; | ||||||
| 1335 | return TC_Success; | ||||||
| 1336 | } | ||||||
| 1337 | } | ||||||
| 1338 | } | ||||||
| 1339 | |||||||
| 1340 | // Reverse integral promotion/conversion. All such conversions are themselves | ||||||
| 1341 | // again integral promotions or conversions and are thus already handled by | ||||||
| 1342 | // p2 (TryDirectInitialization above). | ||||||
| 1343 | // (Note: any data loss warnings should be suppressed.) | ||||||
| 1344 | // The exception is the reverse of enum->integer, i.e. integer->enum (and | ||||||
| 1345 | // enum->enum). See also C++ 5.2.9p7. | ||||||
| 1346 | // The same goes for reverse floating point promotion/conversion and | ||||||
| 1347 | // floating-integral conversions. Again, only floating->enum is relevant. | ||||||
| 1348 | if (DestType->isEnumeralType()) { | ||||||
| 1349 | if (Self.RequireCompleteType(OpRange.getBegin(), DestType, | ||||||
| 1350 | diag::err_bad_cast_incomplete)) { | ||||||
| 1351 | SrcExpr = ExprError(); | ||||||
| 1352 | return TC_Failed; | ||||||
| 1353 | } | ||||||
| 1354 | if (SrcType->isIntegralOrEnumerationType()) { | ||||||
| 1355 | // [expr.static.cast]p10 If the enumeration type has a fixed underlying | ||||||
| 1356 | // type, the value is first converted to that type by integral conversion | ||||||
| 1357 | const EnumType *Enum = DestType->getAs<EnumType>(); | ||||||
| 1358 | Kind = Enum->getDecl()->isFixed() && | ||||||
| |||||||
| 1359 | Enum->getDecl()->getIntegerType()->isBooleanType() | ||||||
| 1360 | ? CK_IntegralToBoolean | ||||||
| 1361 | : CK_IntegralCast; | ||||||
| 1362 | return TC_Success; | ||||||
| 1363 | } else if (SrcType->isRealFloatingType()) { | ||||||
| 1364 | Kind = CK_FloatingToIntegral; | ||||||
| 1365 | return TC_Success; | ||||||
| 1366 | } | ||||||
| 1367 | } | ||||||
| 1368 | |||||||
| 1369 | // Reverse pointer upcast. C++ 4.10p3 specifies pointer upcast. | ||||||
| 1370 | // C++ 5.2.9p8 additionally disallows a cast path through virtual inheritance. | ||||||
| 1371 | tcr = TryStaticPointerDowncast(Self, SrcType, DestType, CStyle, OpRange, msg, | ||||||
| 1372 | Kind, BasePath); | ||||||
| 1373 | if (tcr != TC_NotApplicable) | ||||||
| 1374 | return tcr; | ||||||
| 1375 | |||||||
| 1376 | // Reverse member pointer conversion. C++ 4.11 specifies member pointer | ||||||
| 1377 | // conversion. C++ 5.2.9p9 has additional information. | ||||||
| 1378 | // DR54's access restrictions apply here also. | ||||||
| 1379 | tcr = TryStaticMemberPointerUpcast(Self, SrcExpr, SrcType, DestType, CStyle, | ||||||
| 1380 | OpRange, msg, Kind, BasePath); | ||||||
| 1381 | if (tcr != TC_NotApplicable) | ||||||
| 1382 | return tcr; | ||||||
| 1383 | |||||||
| 1384 | // Reverse pointer conversion to void*. C++ 4.10.p2 specifies conversion to | ||||||
| 1385 | // void*. C++ 5.2.9p10 specifies additional restrictions, which really is | ||||||
| 1386 | // just the usual constness stuff. | ||||||
| 1387 | if (const PointerType *SrcPointer = SrcType->getAs<PointerType>()) { | ||||||
| 1388 | QualType SrcPointee = SrcPointer->getPointeeType(); | ||||||
| 1389 | if (SrcPointee->isVoidType()) { | ||||||
| 1390 | if (const PointerType *DestPointer = DestType->getAs<PointerType>()) { | ||||||
| 1391 | QualType DestPointee = DestPointer->getPointeeType(); | ||||||
| 1392 | if (DestPointee->isIncompleteOrObjectType()) { | ||||||
| 1393 | // This is definitely the intended conversion, but it might fail due | ||||||
| 1394 | // to a qualifier violation. Note that we permit Objective-C lifetime | ||||||
| 1395 | // and GC qualifier mismatches here. | ||||||
| 1396 | if (!CStyle) { | ||||||
| 1397 | Qualifiers DestPointeeQuals = DestPointee.getQualifiers(); | ||||||
| 1398 | Qualifiers SrcPointeeQuals = SrcPointee.getQualifiers(); | ||||||
| 1399 | DestPointeeQuals.removeObjCGCAttr(); | ||||||
| 1400 | DestPointeeQuals.removeObjCLifetime(); | ||||||
| 1401 | SrcPointeeQuals.removeObjCGCAttr(); | ||||||
| 1402 | SrcPointeeQuals.removeObjCLifetime(); | ||||||
| 1403 | if (DestPointeeQuals != SrcPointeeQuals && | ||||||
| 1404 | !DestPointeeQuals.compatiblyIncludes(SrcPointeeQuals)) { | ||||||
| 1405 | msg = diag::err_bad_cxx_cast_qualifiers_away; | ||||||
| 1406 | return TC_Failed; | ||||||
| 1407 | } | ||||||
| 1408 | } | ||||||
| 1409 | Kind = IsAddressSpaceConversion(SrcType, DestType) | ||||||
| 1410 | ? CK_AddressSpaceConversion | ||||||
| 1411 | : CK_BitCast; | ||||||
| 1412 | return TC_Success; | ||||||
| 1413 | } | ||||||
| 1414 | |||||||
| 1415 | // Microsoft permits static_cast from 'pointer-to-void' to | ||||||
| 1416 | // 'pointer-to-function'. | ||||||
| 1417 | if (!CStyle && Self.getLangOpts().MSVCCompat && | ||||||
| 1418 | DestPointee->isFunctionType()) { | ||||||
| 1419 | Self.Diag(OpRange.getBegin(), diag::ext_ms_cast_fn_obj) << OpRange; | ||||||
| 1420 | Kind = CK_BitCast; | ||||||
| 1421 | return TC_Success; | ||||||
| 1422 | } | ||||||
| 1423 | } | ||||||
| 1424 | else if (DestType->isObjCObjectPointerType()) { | ||||||
| 1425 | // allow both c-style cast and static_cast of objective-c pointers as | ||||||
| 1426 | // they are pervasive. | ||||||
| 1427 | Kind = CK_CPointerToObjCPointerCast; | ||||||
| 1428 | return TC_Success; | ||||||
| 1429 | } | ||||||
| 1430 | else if (CStyle && DestType->isBlockPointerType()) { | ||||||
| 1431 | // allow c-style cast of void * to block pointers. | ||||||
| 1432 | Kind = CK_AnyPointerToBlockPointerCast; | ||||||
| 1433 | return TC_Success; | ||||||
| 1434 | } | ||||||
| 1435 | } | ||||||
| 1436 | } | ||||||
| 1437 | // Allow arbitrary objective-c pointer conversion with static casts. | ||||||
| 1438 | if (SrcType->isObjCObjectPointerType() && | ||||||
| 1439 | DestType->isObjCObjectPointerType()) { | ||||||
| 1440 | Kind = CK_BitCast; | ||||||
| 1441 | return TC_Success; | ||||||
| 1442 | } | ||||||
| 1443 | // Allow ns-pointer to cf-pointer conversion in either direction | ||||||
| 1444 | // with static casts. | ||||||
| 1445 | if (!CStyle && | ||||||
| 1446 | Self.CheckTollFreeBridgeStaticCast(DestType, SrcExpr.get(), Kind)) | ||||||
| 1447 | return TC_Success; | ||||||
| 1448 | |||||||
| 1449 | // See if it looks like the user is trying to convert between | ||||||
| 1450 | // related record types, and select a better diagnostic if so. | ||||||
| 1451 | if (auto SrcPointer = SrcType->getAs<PointerType>()) | ||||||
| 1452 | if (auto DestPointer = DestType->getAs<PointerType>()) | ||||||
| 1453 | if (SrcPointer->getPointeeType()->getAs<RecordType>() && | ||||||
| 1454 | DestPointer->getPointeeType()->getAs<RecordType>()) | ||||||
| 1455 | msg = diag::err_bad_cxx_cast_unrelated_class; | ||||||
| 1456 | |||||||
| 1457 | if (SrcType->isMatrixType() && DestType->isMatrixType()) { | ||||||
| 1458 | if (Self.CheckMatrixCast(OpRange, DestType, SrcType, Kind)) { | ||||||
| 1459 | SrcExpr = ExprError(); | ||||||
| 1460 | return TC_Failed; | ||||||
| 1461 | } | ||||||
| 1462 | return TC_Success; | ||||||
| 1463 | } | ||||||
| 1464 | |||||||
| 1465 | // We tried everything. Everything! Nothing works! :-( | ||||||
| 1466 | return TC_NotApplicable; | ||||||
| 1467 | } | ||||||
| 1468 | |||||||
| 1469 | /// Tests whether a conversion according to N2844 is valid. | ||||||
| 1470 | TryCastResult TryLValueToRValueCast(Sema &Self, Expr *SrcExpr, | ||||||
| 1471 | QualType DestType, bool CStyle, | ||||||
| 1472 | CastKind &Kind, CXXCastPath &BasePath, | ||||||
| 1473 | unsigned &msg) { | ||||||
| 1474 | // C++11 [expr.static.cast]p3: | ||||||
| 1475 | // A glvalue of type "cv1 T1" can be cast to type "rvalue reference to | ||||||
| 1476 | // cv2 T2" if "cv2 T2" is reference-compatible with "cv1 T1". | ||||||
| 1477 | const RValueReferenceType *R = DestType->getAs<RValueReferenceType>(); | ||||||
| 1478 | if (!R) | ||||||
| 1479 | return TC_NotApplicable; | ||||||
| 1480 | |||||||
| 1481 | if (!SrcExpr->isGLValue()) | ||||||
| 1482 | return TC_NotApplicable; | ||||||
| 1483 | |||||||
| 1484 | // Because we try the reference downcast before this function, from now on | ||||||
| 1485 | // this is the only cast possibility, so we issue an error if we fail now. | ||||||
| 1486 | // FIXME: Should allow casting away constness if CStyle. | ||||||
| 1487 | QualType FromType = SrcExpr->getType(); | ||||||
| 1488 | QualType ToType = R->getPointeeType(); | ||||||
| 1489 | if (CStyle) { | ||||||
| 1490 | FromType = FromType.getUnqualifiedType(); | ||||||
| 1491 | ToType = ToType.getUnqualifiedType(); | ||||||
| 1492 | } | ||||||
| 1493 | |||||||
| 1494 | Sema::ReferenceConversions RefConv; | ||||||
| 1495 | Sema::ReferenceCompareResult RefResult = Self.CompareReferenceRelationship( | ||||||
| 1496 | SrcExpr->getBeginLoc(), ToType, FromType, &RefConv); | ||||||
| 1497 | if (RefResult != Sema::Ref_Compatible) { | ||||||
| 1498 | if (CStyle || RefResult == Sema::Ref_Incompatible) | ||||||
| 1499 | return TC_NotApplicable; | ||||||
| 1500 | // Diagnose types which are reference-related but not compatible here since | ||||||
| 1501 | // we can provide better diagnostics. In these cases forwarding to | ||||||
| 1502 | // [expr.static.cast]p4 should never result in a well-formed cast. | ||||||
| 1503 | msg = SrcExpr->isLValue() ? diag::err_bad_lvalue_to_rvalue_cast | ||||||
| 1504 | : diag::err_bad_rvalue_to_rvalue_cast; | ||||||
| 1505 | return TC_Failed; | ||||||
| 1506 | } | ||||||
| 1507 | |||||||
| 1508 | if (RefConv & Sema::ReferenceConversions::DerivedToBase) { | ||||||
| 1509 | Kind = CK_DerivedToBase; | ||||||
| 1510 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, | ||||||
| 1511 | /*DetectVirtual=*/true); | ||||||
| 1512 | if (!Self.IsDerivedFrom(SrcExpr->getBeginLoc(), SrcExpr->getType(), | ||||||
| 1513 | R->getPointeeType(), Paths)) | ||||||
| 1514 | return TC_NotApplicable; | ||||||
| 1515 | |||||||
| 1516 | Self.BuildBasePathArray(Paths, BasePath); | ||||||
| 1517 | } else | ||||||
| 1518 | Kind = CK_NoOp; | ||||||
| 1519 | |||||||
| 1520 | return TC_Success; | ||||||
| 1521 | } | ||||||
| 1522 | |||||||
| 1523 | /// Tests whether a conversion according to C++ 5.2.9p5 is valid. | ||||||
| 1524 | TryCastResult | ||||||
| 1525 | TryStaticReferenceDowncast(Sema &Self, Expr *SrcExpr, QualType DestType, | ||||||
| 1526 | bool CStyle, SourceRange OpRange, | ||||||
| 1527 | unsigned &msg, CastKind &Kind, | ||||||
| 1528 | CXXCastPath &BasePath) { | ||||||
| 1529 | // C++ 5.2.9p5: An lvalue of type "cv1 B", where B is a class type, can be | ||||||
| 1530 | // cast to type "reference to cv2 D", where D is a class derived from B, | ||||||
| 1531 | // if a valid standard conversion from "pointer to D" to "pointer to B" | ||||||
| 1532 | // exists, cv2 >= cv1, and B is not a virtual base class of D. | ||||||
| 1533 | // In addition, DR54 clarifies that the base must be accessible in the | ||||||
| 1534 | // current context. Although the wording of DR54 only applies to the pointer | ||||||
| 1535 | // variant of this rule, the intent is clearly for it to apply to the this | ||||||
| 1536 | // conversion as well. | ||||||
| 1537 | |||||||
| 1538 | const ReferenceType *DestReference = DestType->getAs<ReferenceType>(); | ||||||
| 1539 | if (!DestReference) { | ||||||
| 1540 | return TC_NotApplicable; | ||||||
| 1541 | } | ||||||
| 1542 | bool RValueRef = DestReference->isRValueReferenceType(); | ||||||
| 1543 | if (!RValueRef && !SrcExpr->isLValue()) { | ||||||
| 1544 | // We know the left side is an lvalue reference, so we can suggest a reason. | ||||||
| 1545 | msg = diag::err_bad_cxx_cast_rvalue; | ||||||
| 1546 | return TC_NotApplicable; | ||||||
| 1547 | } | ||||||
| 1548 | |||||||
| 1549 | QualType DestPointee = DestReference->getPointeeType(); | ||||||
| 1550 | |||||||
| 1551 | // FIXME: If the source is a prvalue, we should issue a warning (because the | ||||||
| 1552 | // cast always has undefined behavior), and for AST consistency, we should | ||||||
| 1553 | // materialize a temporary. | ||||||
| 1554 | return TryStaticDowncast(Self, | ||||||
| 1555 | Self.Context.getCanonicalType(SrcExpr->getType()), | ||||||
| 1556 | Self.Context.getCanonicalType(DestPointee), CStyle, | ||||||
| 1557 | OpRange, SrcExpr->getType(), DestType, msg, Kind, | ||||||
| 1558 | BasePath); | ||||||
| 1559 | } | ||||||
| 1560 | |||||||
| 1561 | /// Tests whether a conversion according to C++ 5.2.9p8 is valid. | ||||||
| 1562 | TryCastResult | ||||||
| 1563 | TryStaticPointerDowncast(Sema &Self, QualType SrcType, QualType DestType, | ||||||
| 1564 | bool CStyle, SourceRange OpRange, | ||||||
| 1565 | unsigned &msg, CastKind &Kind, | ||||||
| 1566 | CXXCastPath &BasePath) { | ||||||
| 1567 | // C++ 5.2.9p8: An rvalue of type "pointer to cv1 B", where B is a class | ||||||
| 1568 | // type, can be converted to an rvalue of type "pointer to cv2 D", where D | ||||||
| 1569 | // is a class derived from B, if a valid standard conversion from "pointer | ||||||
| 1570 | // to D" to "pointer to B" exists, cv2 >= cv1, and B is not a virtual base | ||||||
| 1571 | // class of D. | ||||||
| 1572 | // In addition, DR54 clarifies that the base must be accessible in the | ||||||
| 1573 | // current context. | ||||||
| 1574 | |||||||
| 1575 | const PointerType *DestPointer = DestType->getAs<PointerType>(); | ||||||
| 1576 | if (!DestPointer) { | ||||||
| 1577 | return TC_NotApplicable; | ||||||
| 1578 | } | ||||||
| 1579 | |||||||
| 1580 | const PointerType *SrcPointer = SrcType->getAs<PointerType>(); | ||||||
| 1581 | if (!SrcPointer) { | ||||||
| 1582 | msg = diag::err_bad_static_cast_pointer_nonpointer; | ||||||
| 1583 | return TC_NotApplicable; | ||||||
| 1584 | } | ||||||
| 1585 | |||||||
| 1586 | return TryStaticDowncast(Self, | ||||||
| 1587 | Self.Context.getCanonicalType(SrcPointer->getPointeeType()), | ||||||
| 1588 | Self.Context.getCanonicalType(DestPointer->getPointeeType()), | ||||||
| 1589 | CStyle, OpRange, SrcType, DestType, msg, Kind, | ||||||
| 1590 | BasePath); | ||||||
| 1591 | } | ||||||
| 1592 | |||||||
| 1593 | /// TryStaticDowncast - Common functionality of TryStaticReferenceDowncast and | ||||||
| 1594 | /// TryStaticPointerDowncast. Tests whether a static downcast from SrcType to | ||||||
| 1595 | /// DestType is possible and allowed. | ||||||
| 1596 | TryCastResult | ||||||
| 1597 | TryStaticDowncast(Sema &Self, CanQualType SrcType, CanQualType DestType, | ||||||
| 1598 | bool CStyle, SourceRange OpRange, QualType OrigSrcType, | ||||||
| 1599 | QualType OrigDestType, unsigned &msg, | ||||||
| 1600 | CastKind &Kind, CXXCastPath &BasePath) { | ||||||
| 1601 | // We can only work with complete types. But don't complain if it doesn't work | ||||||
| 1602 | if (!Self.isCompleteType(OpRange.getBegin(), SrcType) || | ||||||
| 1603 | !Self.isCompleteType(OpRange.getBegin(), DestType)) | ||||||
| 1604 | return TC_NotApplicable; | ||||||
| 1605 | |||||||
| 1606 | // Downcast can only happen in class hierarchies, so we need classes. | ||||||
| 1607 | if (!DestType->getAs<RecordType>() || !SrcType->getAs<RecordType>()) { | ||||||
| 1608 | return TC_NotApplicable; | ||||||
| 1609 | } | ||||||
| 1610 | |||||||
| 1611 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, | ||||||
| 1612 | /*DetectVirtual=*/true); | ||||||
| 1613 | if (!Self.IsDerivedFrom(OpRange.getBegin(), DestType, SrcType, Paths)) { | ||||||
| 1614 | return TC_NotApplicable; | ||||||
| 1615 | } | ||||||
| 1616 | |||||||
| 1617 | // Target type does derive from source type. Now we're serious. If an error | ||||||
| 1618 | // appears now, it's not ignored. | ||||||
| 1619 | // This may not be entirely in line with the standard. Take for example: | ||||||
| 1620 | // struct A {}; | ||||||
| 1621 | // struct B : virtual A { | ||||||
| 1622 | // B(A&); | ||||||
| 1623 | // }; | ||||||
| 1624 | // | ||||||
| 1625 | // void f() | ||||||
| 1626 | // { | ||||||
| 1627 | // (void)static_cast<const B&>(*((A*)0)); | ||||||
| 1628 | // } | ||||||
| 1629 | // As far as the standard is concerned, p5 does not apply (A is virtual), so | ||||||
| 1630 | // p2 should be used instead - "const B& t(*((A*)0));" is perfectly valid. | ||||||
| 1631 | // However, both GCC and Comeau reject this example, and accepting it would | ||||||
| 1632 | // mean more complex code if we're to preserve the nice error message. | ||||||
| 1633 | // FIXME: Being 100% compliant here would be nice to have. | ||||||
| 1634 | |||||||
| 1635 | // Must preserve cv, as always, unless we're in C-style mode. | ||||||
| 1636 | if (!CStyle && !DestType.isAtLeastAsQualifiedAs(SrcType)) { | ||||||
| 1637 | msg = diag::err_bad_cxx_cast_qualifiers_away; | ||||||
| 1638 | return TC_Failed; | ||||||
| 1639 | } | ||||||
| 1640 | |||||||
| 1641 | if (Paths.isAmbiguous(SrcType.getUnqualifiedType())) { | ||||||
| 1642 | // This code is analoguous to that in CheckDerivedToBaseConversion, except | ||||||
| 1643 | // that it builds the paths in reverse order. | ||||||
| 1644 | // To sum up: record all paths to the base and build a nice string from | ||||||
| 1645 | // them. Use it to spice up the error message. | ||||||
| 1646 | if (!Paths.isRecordingPaths()) { | ||||||
| 1647 | Paths.clear(); | ||||||
| 1648 | Paths.setRecordingPaths(true); | ||||||
| 1649 | Self.IsDerivedFrom(OpRange.getBegin(), DestType, SrcType, Paths); | ||||||
| 1650 | } | ||||||
| 1651 | std::string PathDisplayStr; | ||||||
| 1652 | std::set<unsigned> DisplayedPaths; | ||||||
| 1653 | for (clang::CXXBasePath &Path : Paths) { | ||||||
| 1654 | if (DisplayedPaths.insert(Path.back().SubobjectNumber).second) { | ||||||
| 1655 | // We haven't displayed a path to this particular base | ||||||
| 1656 | // class subobject yet. | ||||||
| 1657 | PathDisplayStr += "\n "; | ||||||
| 1658 | for (CXXBasePathElement &PE : llvm::reverse(Path)) | ||||||
| 1659 | PathDisplayStr += PE.Base->getType().getAsString() + " -> "; | ||||||
| 1660 | PathDisplayStr += QualType(DestType).getAsString(); | ||||||
| 1661 | } | ||||||
| 1662 | } | ||||||
| 1663 | |||||||
| 1664 | Self.Diag(OpRange.getBegin(), diag::err_ambiguous_base_to_derived_cast) | ||||||
| 1665 | << QualType(SrcType).getUnqualifiedType() | ||||||
| 1666 | << QualType(DestType).getUnqualifiedType() | ||||||
| 1667 | << PathDisplayStr << OpRange; | ||||||
| 1668 | msg = 0; | ||||||
| 1669 | return TC_Failed; | ||||||
| 1670 | } | ||||||
| 1671 | |||||||
| 1672 | if (Paths.getDetectedVirtual() != nullptr) { | ||||||
| 1673 | QualType VirtualBase(Paths.getDetectedVirtual(), 0); | ||||||
| 1674 | Self.Diag(OpRange.getBegin(), diag::err_static_downcast_via_virtual) | ||||||
| 1675 | << OrigSrcType << OrigDestType << VirtualBase << OpRange; | ||||||
| 1676 | msg = 0; | ||||||
| 1677 | return TC_Failed; | ||||||
| 1678 | } | ||||||
| 1679 | |||||||
| 1680 | if (!CStyle) { | ||||||
| 1681 | switch (Self.CheckBaseClassAccess(OpRange.getBegin(), | ||||||
| 1682 | SrcType, DestType, | ||||||
| 1683 | Paths.front(), | ||||||
| 1684 | diag::err_downcast_from_inaccessible_base)) { | ||||||
| 1685 | case Sema::AR_accessible: | ||||||
| 1686 | case Sema::AR_delayed: // be optimistic | ||||||
| 1687 | case Sema::AR_dependent: // be optimistic | ||||||
| 1688 | break; | ||||||
| 1689 | |||||||
| 1690 | case Sema::AR_inaccessible: | ||||||
| 1691 | msg = 0; | ||||||
| 1692 | return TC_Failed; | ||||||
| 1693 | } | ||||||
| 1694 | } | ||||||
| 1695 | |||||||
| 1696 | Self.BuildBasePathArray(Paths, BasePath); | ||||||
| 1697 | Kind = CK_BaseToDerived; | ||||||
| 1698 | return TC_Success; | ||||||
| 1699 | } | ||||||
| 1700 | |||||||
| 1701 | /// TryStaticMemberPointerUpcast - Tests whether a conversion according to | ||||||
| 1702 | /// C++ 5.2.9p9 is valid: | ||||||
| 1703 | /// | ||||||
| 1704 | /// An rvalue of type "pointer to member of D of type cv1 T" can be | ||||||
| 1705 | /// converted to an rvalue of type "pointer to member of B of type cv2 T", | ||||||
| 1706 | /// where B is a base class of D [...]. | ||||||
| 1707 | /// | ||||||
| 1708 | TryCastResult | ||||||
| 1709 | TryStaticMemberPointerUpcast(Sema &Self, ExprResult &SrcExpr, QualType SrcType, | ||||||
| 1710 | QualType DestType, bool CStyle, | ||||||
| 1711 | SourceRange OpRange, | ||||||
| 1712 | unsigned &msg, CastKind &Kind, | ||||||
| 1713 | CXXCastPath &BasePath) { | ||||||
| 1714 | const MemberPointerType *DestMemPtr = DestType->getAs<MemberPointerType>(); | ||||||
| 1715 | if (!DestMemPtr) | ||||||
| 1716 | return TC_NotApplicable; | ||||||
| 1717 | |||||||
| 1718 | bool WasOverloadedFunction = false; | ||||||
| 1719 | DeclAccessPair FoundOverload; | ||||||
| 1720 | if (SrcExpr.get()->getType() == Self.Context.OverloadTy) { | ||||||
| 1721 | if (FunctionDecl *Fn | ||||||
| 1722 | = Self.ResolveAddressOfOverloadedFunction(SrcExpr.get(), DestType, false, | ||||||
| 1723 | FoundOverload)) { | ||||||
| 1724 | CXXMethodDecl *M = cast<CXXMethodDecl>(Fn); | ||||||
| 1725 | SrcType = Self.Context.getMemberPointerType(Fn->getType(), | ||||||
| 1726 | Self.Context.getTypeDeclType(M->getParent()).getTypePtr()); | ||||||
| 1727 | WasOverloadedFunction = true; | ||||||
| 1728 | } | ||||||
| 1729 | } | ||||||
| 1730 | |||||||
| 1731 | const MemberPointerType *SrcMemPtr = SrcType->getAs<MemberPointerType>(); | ||||||
| 1732 | if (!SrcMemPtr) { | ||||||
| 1733 | msg = diag::err_bad_static_cast_member_pointer_nonmp; | ||||||
| 1734 | return TC_NotApplicable; | ||||||
| 1735 | } | ||||||
| 1736 | |||||||
| 1737 | // Lock down the inheritance model right now in MS ABI, whether or not the | ||||||
| 1738 | // pointee types are the same. | ||||||
| 1739 | if (Self.Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||
| 1740 | (void)Self.isCompleteType(OpRange.getBegin(), SrcType); | ||||||
| 1741 | (void)Self.isCompleteType(OpRange.getBegin(), DestType); | ||||||
| 1742 | } | ||||||
| 1743 | |||||||
| 1744 | // T == T, modulo cv | ||||||
| 1745 | if (!Self.Context.hasSameUnqualifiedType(SrcMemPtr->getPointeeType(), | ||||||
| 1746 | DestMemPtr->getPointeeType())) | ||||||
| 1747 | return TC_NotApplicable; | ||||||
| 1748 | |||||||
| 1749 | // B base of D | ||||||
| 1750 | QualType SrcClass(SrcMemPtr->getClass(), 0); | ||||||
| 1751 | QualType DestClass(DestMemPtr->getClass(), 0); | ||||||
| 1752 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, | ||||||
| 1753 | /*DetectVirtual=*/true); | ||||||
| 1754 | if (!Self.IsDerivedFrom(OpRange.getBegin(), SrcClass, DestClass, Paths)) | ||||||
| 1755 | return TC_NotApplicable; | ||||||
| 1756 | |||||||
| 1757 | // B is a base of D. But is it an allowed base? If not, it's a hard error. | ||||||
| 1758 | if (Paths.isAmbiguous(Self.Context.getCanonicalType(DestClass))) { | ||||||
| 1759 | Paths.clear(); | ||||||
| 1760 | Paths.setRecordingPaths(true); | ||||||
| 1761 | bool StillOkay = | ||||||
| 1762 | Self.IsDerivedFrom(OpRange.getBegin(), SrcClass, DestClass, Paths); | ||||||
| 1763 | assert(StillOkay)(static_cast <bool> (StillOkay) ? void (0) : __assert_fail ("StillOkay", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 1763, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 1764 | (void)StillOkay; | ||||||
| 1765 | std::string PathDisplayStr = Self.getAmbiguousPathsDisplayString(Paths); | ||||||
| 1766 | Self.Diag(OpRange.getBegin(), diag::err_ambiguous_memptr_conv) | ||||||
| 1767 | << 1 << SrcClass << DestClass << PathDisplayStr << OpRange; | ||||||
| 1768 | msg = 0; | ||||||
| 1769 | return TC_Failed; | ||||||
| 1770 | } | ||||||
| 1771 | |||||||
| 1772 | if (const RecordType *VBase = Paths.getDetectedVirtual()) { | ||||||
| 1773 | Self.Diag(OpRange.getBegin(), diag::err_memptr_conv_via_virtual) | ||||||
| 1774 | << SrcClass << DestClass << QualType(VBase, 0) << OpRange; | ||||||
| 1775 | msg = 0; | ||||||
| 1776 | return TC_Failed; | ||||||
| 1777 | } | ||||||
| 1778 | |||||||
| 1779 | if (!CStyle) { | ||||||
| 1780 | switch (Self.CheckBaseClassAccess(OpRange.getBegin(), | ||||||
| 1781 | DestClass, SrcClass, | ||||||
| 1782 | Paths.front(), | ||||||
| 1783 | diag::err_upcast_to_inaccessible_base)) { | ||||||
| 1784 | case Sema::AR_accessible: | ||||||
| 1785 | case Sema::AR_delayed: | ||||||
| 1786 | case Sema::AR_dependent: | ||||||
| 1787 | // Optimistically assume that the delayed and dependent cases | ||||||
| 1788 | // will work out. | ||||||
| 1789 | break; | ||||||
| 1790 | |||||||
| 1791 | case Sema::AR_inaccessible: | ||||||
| 1792 | msg = 0; | ||||||
| 1793 | return TC_Failed; | ||||||
| 1794 | } | ||||||
| 1795 | } | ||||||
| 1796 | |||||||
| 1797 | if (WasOverloadedFunction) { | ||||||
| 1798 | // Resolve the address of the overloaded function again, this time | ||||||
| 1799 | // allowing complaints if something goes wrong. | ||||||
| 1800 | FunctionDecl *Fn = Self.ResolveAddressOfOverloadedFunction(SrcExpr.get(), | ||||||
| 1801 | DestType, | ||||||
| 1802 | true, | ||||||
| 1803 | FoundOverload); | ||||||
| 1804 | if (!Fn) { | ||||||
| 1805 | msg = 0; | ||||||
| 1806 | return TC_Failed; | ||||||
| 1807 | } | ||||||
| 1808 | |||||||
| 1809 | SrcExpr = Self.FixOverloadedFunctionReference(SrcExpr, FoundOverload, Fn); | ||||||
| 1810 | if (!SrcExpr.isUsable()) { | ||||||
| 1811 | msg = 0; | ||||||
| 1812 | return TC_Failed; | ||||||
| 1813 | } | ||||||
| 1814 | } | ||||||
| 1815 | |||||||
| 1816 | Self.BuildBasePathArray(Paths, BasePath); | ||||||
| 1817 | Kind = CK_DerivedToBaseMemberPointer; | ||||||
| 1818 | return TC_Success; | ||||||
| 1819 | } | ||||||
| 1820 | |||||||
| 1821 | /// TryStaticImplicitCast - Tests whether a conversion according to C++ 5.2.9p2 | ||||||
| 1822 | /// is valid: | ||||||
| 1823 | /// | ||||||
| 1824 | /// An expression e can be explicitly converted to a type T using a | ||||||
| 1825 | /// @c static_cast if the declaration "T t(e);" is well-formed [...]. | ||||||
| 1826 | TryCastResult | ||||||
| 1827 | TryStaticImplicitCast(Sema &Self, ExprResult &SrcExpr, QualType DestType, | ||||||
| 1828 | Sema::CheckedConversionKind CCK, | ||||||
| 1829 | SourceRange OpRange, unsigned &msg, | ||||||
| 1830 | CastKind &Kind, bool ListInitialization) { | ||||||
| 1831 | if (DestType->isRecordType()) { | ||||||
| 1832 | if (Self.RequireCompleteType(OpRange.getBegin(), DestType, | ||||||
| 1833 | diag::err_bad_cast_incomplete) || | ||||||
| 1834 | Self.RequireNonAbstractType(OpRange.getBegin(), DestType, | ||||||
| 1835 | diag::err_allocation_of_abstract_type)) { | ||||||
| 1836 | msg = 0; | ||||||
| 1837 | return TC_Failed; | ||||||
| 1838 | } | ||||||
| 1839 | } | ||||||
| 1840 | |||||||
| 1841 | InitializedEntity Entity = InitializedEntity::InitializeTemporary(DestType); | ||||||
| 1842 | InitializationKind InitKind | ||||||
| 1843 | = (CCK == Sema::CCK_CStyleCast) | ||||||
| 1844 | ? InitializationKind::CreateCStyleCast(OpRange.getBegin(), OpRange, | ||||||
| 1845 | ListInitialization) | ||||||
| 1846 | : (CCK == Sema::CCK_FunctionalCast) | ||||||
| 1847 | ? InitializationKind::CreateFunctionalCast(OpRange, ListInitialization) | ||||||
| 1848 | : InitializationKind::CreateCast(OpRange); | ||||||
| 1849 | Expr *SrcExprRaw = SrcExpr.get(); | ||||||
| 1850 | // FIXME: Per DR242, we should check for an implicit conversion sequence | ||||||
| 1851 | // or for a constructor that could be invoked by direct-initialization | ||||||
| 1852 | // here, not for an initialization sequence. | ||||||
| 1853 | InitializationSequence InitSeq(Self, Entity, InitKind, SrcExprRaw); | ||||||
| 1854 | |||||||
| 1855 | // At this point of CheckStaticCast, if the destination is a reference, | ||||||
| 1856 | // or the expression is an overload expression this has to work. | ||||||
| 1857 | // There is no other way that works. | ||||||
| 1858 | // On the other hand, if we're checking a C-style cast, we've still got | ||||||
| 1859 | // the reinterpret_cast way. | ||||||
| 1860 | bool CStyle | ||||||
| 1861 | = (CCK == Sema::CCK_CStyleCast || CCK == Sema::CCK_FunctionalCast); | ||||||
| 1862 | if (InitSeq.Failed() && (CStyle || !DestType->isReferenceType())) | ||||||
| 1863 | return TC_NotApplicable; | ||||||
| 1864 | |||||||
| 1865 | ExprResult Result = InitSeq.Perform(Self, Entity, InitKind, SrcExprRaw); | ||||||
| 1866 | if (Result.isInvalid()) { | ||||||
| 1867 | msg = 0; | ||||||
| 1868 | return TC_Failed; | ||||||
| 1869 | } | ||||||
| 1870 | |||||||
| 1871 | if (InitSeq.isConstructorInitialization()) | ||||||
| 1872 | Kind = CK_ConstructorConversion; | ||||||
| 1873 | else | ||||||
| 1874 | Kind = CK_NoOp; | ||||||
| 1875 | |||||||
| 1876 | SrcExpr = Result; | ||||||
| 1877 | return TC_Success; | ||||||
| 1878 | } | ||||||
| 1879 | |||||||
| 1880 | /// TryConstCast - See if a const_cast from source to destination is allowed, | ||||||
| 1881 | /// and perform it if it is. | ||||||
| 1882 | static TryCastResult TryConstCast(Sema &Self, ExprResult &SrcExpr, | ||||||
| 1883 | QualType DestType, bool CStyle, | ||||||
| 1884 | unsigned &msg) { | ||||||
| 1885 | DestType = Self.Context.getCanonicalType(DestType); | ||||||
| 1886 | QualType SrcType = SrcExpr.get()->getType(); | ||||||
| 1887 | bool NeedToMaterializeTemporary = false; | ||||||
| 1888 | |||||||
| 1889 | if (const ReferenceType *DestTypeTmp =DestType->getAs<ReferenceType>()) { | ||||||
| 1890 | // C++11 5.2.11p4: | ||||||
| 1891 | // if a pointer to T1 can be explicitly converted to the type "pointer to | ||||||
| 1892 | // T2" using a const_cast, then the following conversions can also be | ||||||
| 1893 | // made: | ||||||
| 1894 | // -- an lvalue of type T1 can be explicitly converted to an lvalue of | ||||||
| 1895 | // type T2 using the cast const_cast<T2&>; | ||||||
| 1896 | // -- a glvalue of type T1 can be explicitly converted to an xvalue of | ||||||
| 1897 | // type T2 using the cast const_cast<T2&&>; and | ||||||
| 1898 | // -- if T1 is a class type, a prvalue of type T1 can be explicitly | ||||||
| 1899 | // converted to an xvalue of type T2 using the cast const_cast<T2&&>. | ||||||
| 1900 | |||||||
| 1901 | if (isa<LValueReferenceType>(DestTypeTmp) && !SrcExpr.get()->isLValue()) { | ||||||
| 1902 | // Cannot const_cast non-lvalue to lvalue reference type. But if this | ||||||
| 1903 | // is C-style, static_cast might find a way, so we simply suggest a | ||||||
| 1904 | // message and tell the parent to keep searching. | ||||||
| 1905 | msg = diag::err_bad_cxx_cast_rvalue; | ||||||
| 1906 | return TC_NotApplicable; | ||||||
| 1907 | } | ||||||
| 1908 | |||||||
| 1909 | if (isa<RValueReferenceType>(DestTypeTmp) && SrcExpr.get()->isPRValue()) { | ||||||
| 1910 | if (!SrcType->isRecordType()) { | ||||||
| 1911 | // Cannot const_cast non-class prvalue to rvalue reference type. But if | ||||||
| 1912 | // this is C-style, static_cast can do this. | ||||||
| 1913 | msg = diag::err_bad_cxx_cast_rvalue; | ||||||
| 1914 | return TC_NotApplicable; | ||||||
| 1915 | } | ||||||
| 1916 | |||||||
| 1917 | // Materialize the class prvalue so that the const_cast can bind a | ||||||
| 1918 | // reference to it. | ||||||
| 1919 | NeedToMaterializeTemporary = true; | ||||||
| 1920 | } | ||||||
| 1921 | |||||||
| 1922 | // It's not completely clear under the standard whether we can | ||||||
| 1923 | // const_cast bit-field gl-values. Doing so would not be | ||||||
| 1924 | // intrinsically complicated, but for now, we say no for | ||||||
| 1925 | // consistency with other compilers and await the word of the | ||||||
| 1926 | // committee. | ||||||
| 1927 | if (SrcExpr.get()->refersToBitField()) { | ||||||
| 1928 | msg = diag::err_bad_cxx_cast_bitfield; | ||||||
| 1929 | return TC_NotApplicable; | ||||||
| 1930 | } | ||||||
| 1931 | |||||||
| 1932 | DestType = Self.Context.getPointerType(DestTypeTmp->getPointeeType()); | ||||||
| 1933 | SrcType = Self.Context.getPointerType(SrcType); | ||||||
| 1934 | } | ||||||
| 1935 | |||||||
| 1936 | // C++ 5.2.11p5: For a const_cast involving pointers to data members [...] | ||||||
| 1937 | // the rules for const_cast are the same as those used for pointers. | ||||||
| 1938 | |||||||
| 1939 | if (!DestType->isPointerType() && | ||||||
| 1940 | !DestType->isMemberPointerType() && | ||||||
| 1941 | !DestType->isObjCObjectPointerType()) { | ||||||
| 1942 | // Cannot cast to non-pointer, non-reference type. Note that, if DestType | ||||||
| 1943 | // was a reference type, we converted it to a pointer above. | ||||||
| 1944 | // The status of rvalue references isn't entirely clear, but it looks like | ||||||
| 1945 | // conversion to them is simply invalid. | ||||||
| 1946 | // C++ 5.2.11p3: For two pointer types [...] | ||||||
| 1947 | if (!CStyle) | ||||||
| 1948 | msg = diag::err_bad_const_cast_dest; | ||||||
| 1949 | return TC_NotApplicable; | ||||||
| 1950 | } | ||||||
| 1951 | if (DestType->isFunctionPointerType() || | ||||||
| 1952 | DestType->isMemberFunctionPointerType()) { | ||||||
| 1953 | // Cannot cast direct function pointers. | ||||||
| 1954 | // C++ 5.2.11p2: [...] where T is any object type or the void type [...] | ||||||
| 1955 | // T is the ultimate pointee of source and target type. | ||||||
| 1956 | if (!CStyle) | ||||||
| 1957 | msg = diag::err_bad_const_cast_dest; | ||||||
| 1958 | return TC_NotApplicable; | ||||||
| 1959 | } | ||||||
| 1960 | |||||||
| 1961 | // C++ [expr.const.cast]p3: | ||||||
| 1962 | // "For two similar types T1 and T2, [...]" | ||||||
| 1963 | // | ||||||
| 1964 | // We only allow a const_cast to change cvr-qualifiers, not other kinds of | ||||||
| 1965 | // type qualifiers. (Likewise, we ignore other changes when determining | ||||||
| 1966 | // whether a cast casts away constness.) | ||||||
| 1967 | if (!Self.Context.hasCvrSimilarType(SrcType, DestType)) | ||||||
| 1968 | return TC_NotApplicable; | ||||||
| 1969 | |||||||
| 1970 | if (NeedToMaterializeTemporary) | ||||||
| 1971 | // This is a const_cast from a class prvalue to an rvalue reference type. | ||||||
| 1972 | // Materialize a temporary to store the result of the conversion. | ||||||
| 1973 | SrcExpr = Self.CreateMaterializeTemporaryExpr(SrcExpr.get()->getType(), | ||||||
| 1974 | SrcExpr.get(), | ||||||
| 1975 | /*IsLValueReference*/ false); | ||||||
| 1976 | |||||||
| 1977 | return TC_Success; | ||||||
| 1978 | } | ||||||
| 1979 | |||||||
| 1980 | // Checks for undefined behavior in reinterpret_cast. | ||||||
| 1981 | // The cases that is checked for is: | ||||||
| 1982 | // *reinterpret_cast<T*>(&a) | ||||||
| 1983 | // reinterpret_cast<T&>(a) | ||||||
| 1984 | // where accessing 'a' as type 'T' will result in undefined behavior. | ||||||
| 1985 | void Sema::CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, | ||||||
| 1986 | bool IsDereference, | ||||||
| 1987 | SourceRange Range) { | ||||||
| 1988 | unsigned DiagID = IsDereference ? | ||||||
| 1989 | diag::warn_pointer_indirection_from_incompatible_type : | ||||||
| 1990 | diag::warn_undefined_reinterpret_cast; | ||||||
| 1991 | |||||||
| 1992 | if (Diags.isIgnored(DiagID, Range.getBegin())) | ||||||
| 1993 | return; | ||||||
| 1994 | |||||||
| 1995 | QualType SrcTy, DestTy; | ||||||
| 1996 | if (IsDereference) { | ||||||
| 1997 | if (!SrcType->getAs<PointerType>() || !DestType->getAs<PointerType>()) { | ||||||
| 1998 | return; | ||||||
| 1999 | } | ||||||
| 2000 | SrcTy = SrcType->getPointeeType(); | ||||||
| 2001 | DestTy = DestType->getPointeeType(); | ||||||
| 2002 | } else { | ||||||
| 2003 | if (!DestType->getAs<ReferenceType>()) { | ||||||
| 2004 | return; | ||||||
| 2005 | } | ||||||
| 2006 | SrcTy = SrcType; | ||||||
| 2007 | DestTy = DestType->getPointeeType(); | ||||||
| 2008 | } | ||||||
| 2009 | |||||||
| 2010 | // Cast is compatible if the types are the same. | ||||||
| 2011 | if (Context.hasSameUnqualifiedType(DestTy, SrcTy)) { | ||||||
| 2012 | return; | ||||||
| 2013 | } | ||||||
| 2014 | // or one of the types is a char or void type | ||||||
| 2015 | if (DestTy->isAnyCharacterType() || DestTy->isVoidType() || | ||||||
| 2016 | SrcTy->isAnyCharacterType() || SrcTy->isVoidType()) { | ||||||
| 2017 | return; | ||||||
| 2018 | } | ||||||
| 2019 | // or one of the types is a tag type. | ||||||
| 2020 | if (SrcTy->getAs<TagType>() || DestTy->getAs<TagType>()) { | ||||||
| 2021 | return; | ||||||
| 2022 | } | ||||||
| 2023 | |||||||
| 2024 | // FIXME: Scoped enums? | ||||||
| 2025 | if ((SrcTy->isUnsignedIntegerType() && DestTy->isSignedIntegerType()) || | ||||||
| 2026 | (SrcTy->isSignedIntegerType() && DestTy->isUnsignedIntegerType())) { | ||||||
| 2027 | if (Context.getTypeSize(DestTy) == Context.getTypeSize(SrcTy)) { | ||||||
| 2028 | return; | ||||||
| 2029 | } | ||||||
| 2030 | } | ||||||
| 2031 | |||||||
| 2032 | Diag(Range.getBegin(), DiagID) << SrcType << DestType << Range; | ||||||
| 2033 | } | ||||||
| 2034 | |||||||
| 2035 | static void DiagnoseCastOfObjCSEL(Sema &Self, const ExprResult &SrcExpr, | ||||||
| 2036 | QualType DestType) { | ||||||
| 2037 | QualType SrcType = SrcExpr.get()->getType(); | ||||||
| 2038 | if (Self.Context.hasSameType(SrcType, DestType)) | ||||||
| 2039 | return; | ||||||
| 2040 | if (const PointerType *SrcPtrTy = SrcType->getAs<PointerType>()) | ||||||
| 2041 | if (SrcPtrTy->isObjCSelType()) { | ||||||
| 2042 | QualType DT = DestType; | ||||||
| 2043 | if (isa<PointerType>(DestType)) | ||||||
| 2044 | DT = DestType->getPointeeType(); | ||||||
| 2045 | if (!DT.getUnqualifiedType()->isVoidType()) | ||||||
| 2046 | Self.Diag(SrcExpr.get()->getExprLoc(), | ||||||
| 2047 | diag::warn_cast_pointer_from_sel) | ||||||
| 2048 | << SrcType << DestType << SrcExpr.get()->getSourceRange(); | ||||||
| 2049 | } | ||||||
| 2050 | } | ||||||
| 2051 | |||||||
| 2052 | /// Diagnose casts that change the calling convention of a pointer to a function | ||||||
| 2053 | /// defined in the current TU. | ||||||
| 2054 | static void DiagnoseCallingConvCast(Sema &Self, const ExprResult &SrcExpr, | ||||||
| 2055 | QualType DstType, SourceRange OpRange) { | ||||||
| 2056 | // Check if this cast would change the calling convention of a function | ||||||
| 2057 | // pointer type. | ||||||
| 2058 | QualType SrcType = SrcExpr.get()->getType(); | ||||||
| 2059 | if (Self.Context.hasSameType(SrcType, DstType) || | ||||||
| 2060 | !SrcType->isFunctionPointerType() || !DstType->isFunctionPointerType()) | ||||||
| 2061 | return; | ||||||
| 2062 | const auto *SrcFTy = | ||||||
| 2063 | SrcType->castAs<PointerType>()->getPointeeType()->castAs<FunctionType>(); | ||||||
| 2064 | const auto *DstFTy = | ||||||
| 2065 | DstType->castAs<PointerType>()->getPointeeType()->castAs<FunctionType>(); | ||||||
| 2066 | CallingConv SrcCC = SrcFTy->getCallConv(); | ||||||
| 2067 | CallingConv DstCC = DstFTy->getCallConv(); | ||||||
| 2068 | if (SrcCC == DstCC) | ||||||
| 2069 | return; | ||||||
| 2070 | |||||||
| 2071 | // We have a calling convention cast. Check if the source is a pointer to a | ||||||
| 2072 | // known, specific function that has already been defined. | ||||||
| 2073 | Expr *Src = SrcExpr.get()->IgnoreParenImpCasts(); | ||||||
| 2074 | if (auto *UO = dyn_cast<UnaryOperator>(Src)) | ||||||
| 2075 | if (UO->getOpcode() == UO_AddrOf) | ||||||
| 2076 | Src = UO->getSubExpr()->IgnoreParenImpCasts(); | ||||||
| 2077 | auto *DRE = dyn_cast<DeclRefExpr>(Src); | ||||||
| 2078 | if (!DRE) | ||||||
| 2079 | return; | ||||||
| 2080 | auto *FD = dyn_cast<FunctionDecl>(DRE->getDecl()); | ||||||
| 2081 | if (!FD) | ||||||
| 2082 | return; | ||||||
| 2083 | |||||||
| 2084 | // Only warn if we are casting from the default convention to a non-default | ||||||
| 2085 | // convention. This can happen when the programmer forgot to apply the calling | ||||||
| 2086 | // convention to the function declaration and then inserted this cast to | ||||||
| 2087 | // satisfy the type system. | ||||||
| 2088 | CallingConv DefaultCC = Self.getASTContext().getDefaultCallingConvention( | ||||||
| 2089 | FD->isVariadic(), FD->isCXXInstanceMember()); | ||||||
| 2090 | if (DstCC == DefaultCC || SrcCC != DefaultCC) | ||||||
| 2091 | return; | ||||||
| 2092 | |||||||
| 2093 | // Diagnose this cast, as it is probably bad. | ||||||
| 2094 | StringRef SrcCCName = FunctionType::getNameForCallConv(SrcCC); | ||||||
| 2095 | StringRef DstCCName = FunctionType::getNameForCallConv(DstCC); | ||||||
| 2096 | Self.Diag(OpRange.getBegin(), diag::warn_cast_calling_conv) | ||||||
| 2097 | << SrcCCName << DstCCName << OpRange; | ||||||
| 2098 | |||||||
| 2099 | // The checks above are cheaper than checking if the diagnostic is enabled. | ||||||
| 2100 | // However, it's worth checking if the warning is enabled before we construct | ||||||
| 2101 | // a fixit. | ||||||
| 2102 | if (Self.Diags.isIgnored(diag::warn_cast_calling_conv, OpRange.getBegin())) | ||||||
| 2103 | return; | ||||||
| 2104 | |||||||
| 2105 | // Try to suggest a fixit to change the calling convention of the function | ||||||
| 2106 | // whose address was taken. Try to use the latest macro for the convention. | ||||||
| 2107 | // For example, users probably want to write "WINAPI" instead of "__stdcall" | ||||||
| 2108 | // to match the Windows header declarations. | ||||||
| 2109 | SourceLocation NameLoc = FD->getFirstDecl()->getNameInfo().getLoc(); | ||||||
| 2110 | Preprocessor &PP = Self.getPreprocessor(); | ||||||
| 2111 | SmallVector<TokenValue, 6> AttrTokens; | ||||||
| 2112 | SmallString<64> CCAttrText; | ||||||
| 2113 | llvm::raw_svector_ostream OS(CCAttrText); | ||||||
| 2114 | if (Self.getLangOpts().MicrosoftExt) { | ||||||
| 2115 | // __stdcall or __vectorcall | ||||||
| 2116 | OS << "__" << DstCCName; | ||||||
| 2117 | IdentifierInfo *II = PP.getIdentifierInfo(OS.str()); | ||||||
| 2118 | AttrTokens.push_back(II->isKeyword(Self.getLangOpts()) | ||||||
| 2119 | ? TokenValue(II->getTokenID()) | ||||||
| 2120 | : TokenValue(II)); | ||||||
| 2121 | } else { | ||||||
| 2122 | // __attribute__((stdcall)) or __attribute__((vectorcall)) | ||||||
| 2123 | OS << "__attribute__((" << DstCCName << "))"; | ||||||
| 2124 | AttrTokens.push_back(tok::kw___attribute); | ||||||
| 2125 | AttrTokens.push_back(tok::l_paren); | ||||||
| 2126 | AttrTokens.push_back(tok::l_paren); | ||||||
| 2127 | IdentifierInfo *II = PP.getIdentifierInfo(DstCCName); | ||||||
| 2128 | AttrTokens.push_back(II->isKeyword(Self.getLangOpts()) | ||||||
| 2129 | ? TokenValue(II->getTokenID()) | ||||||
| 2130 | : TokenValue(II)); | ||||||
| 2131 | AttrTokens.push_back(tok::r_paren); | ||||||
| 2132 | AttrTokens.push_back(tok::r_paren); | ||||||
| 2133 | } | ||||||
| 2134 | StringRef AttrSpelling = PP.getLastMacroWithSpelling(NameLoc, AttrTokens); | ||||||
| 2135 | if (!AttrSpelling.empty()) | ||||||
| 2136 | CCAttrText = AttrSpelling; | ||||||
| 2137 | OS << ' '; | ||||||
| 2138 | Self.Diag(NameLoc, diag::note_change_calling_conv_fixit) | ||||||
| 2139 | << FD << DstCCName << FixItHint::CreateInsertion(NameLoc, CCAttrText); | ||||||
| 2140 | } | ||||||
| 2141 | |||||||
| 2142 | static void checkIntToPointerCast(bool CStyle, const SourceRange &OpRange, | ||||||
| 2143 | const Expr *SrcExpr, QualType DestType, | ||||||
| 2144 | Sema &Self) { | ||||||
| 2145 | QualType SrcType = SrcExpr->getType(); | ||||||
| 2146 | |||||||
| 2147 | // Not warning on reinterpret_cast, boolean, constant expressions, etc | ||||||
| 2148 | // are not explicit design choices, but consistent with GCC's behavior. | ||||||
| 2149 | // Feel free to modify them if you've reason/evidence for an alternative. | ||||||
| 2150 | if (CStyle && SrcType->isIntegralType(Self.Context) | ||||||
| 2151 | && !SrcType->isBooleanType() | ||||||
| 2152 | && !SrcType->isEnumeralType() | ||||||
| 2153 | && !SrcExpr->isIntegerConstantExpr(Self.Context) | ||||||
| 2154 | && Self.Context.getTypeSize(DestType) > | ||||||
| 2155 | Self.Context.getTypeSize(SrcType)) { | ||||||
| 2156 | // Separate between casts to void* and non-void* pointers. | ||||||
| 2157 | // Some APIs use (abuse) void* for something like a user context, | ||||||
| 2158 | // and often that value is an integer even if it isn't a pointer itself. | ||||||
| 2159 | // Having a separate warning flag allows users to control the warning | ||||||
| 2160 | // for their workflow. | ||||||
| 2161 | unsigned Diag = DestType->isVoidPointerType() ? | ||||||
| 2162 | diag::warn_int_to_void_pointer_cast | ||||||
| 2163 | : diag::warn_int_to_pointer_cast; | ||||||
| 2164 | Self.Diag(OpRange.getBegin(), Diag) << SrcType << DestType << OpRange; | ||||||
| 2165 | } | ||||||
| 2166 | } | ||||||
| 2167 | |||||||
| 2168 | static bool fixOverloadedReinterpretCastExpr(Sema &Self, QualType DestType, | ||||||
| 2169 | ExprResult &Result) { | ||||||
| 2170 | // We can only fix an overloaded reinterpret_cast if | ||||||
| 2171 | // - it is a template with explicit arguments that resolves to an lvalue | ||||||
| 2172 | // unambiguously, or | ||||||
| 2173 | // - it is the only function in an overload set that may have its address | ||||||
| 2174 | // taken. | ||||||
| 2175 | |||||||
| 2176 | Expr *E = Result.get(); | ||||||
| 2177 | // TODO: what if this fails because of DiagnoseUseOfDecl or something | ||||||
| 2178 | // like it? | ||||||
| 2179 | if (Self.ResolveAndFixSingleFunctionTemplateSpecialization( | ||||||
| 2180 | Result, | ||||||
| 2181 | Expr::getValueKindForType(DestType) == | ||||||
| 2182 | VK_PRValue // Convert Fun to Ptr | ||||||
| 2183 | ) && | ||||||
| 2184 | Result.isUsable()) | ||||||
| 2185 | return true; | ||||||
| 2186 | |||||||
| 2187 | // No guarantees that ResolveAndFixSingleFunctionTemplateSpecialization | ||||||
| 2188 | // preserves Result. | ||||||
| 2189 | Result = E; | ||||||
| 2190 | if (!Self.resolveAndFixAddressOfSingleOverloadCandidate( | ||||||
| 2191 | Result, /*DoFunctionPointerConversion=*/true)) | ||||||
| 2192 | return false; | ||||||
| 2193 | return Result.isUsable(); | ||||||
| 2194 | } | ||||||
| 2195 | |||||||
| 2196 | static TryCastResult TryReinterpretCast(Sema &Self, ExprResult &SrcExpr, | ||||||
| 2197 | QualType DestType, bool CStyle, | ||||||
| 2198 | SourceRange OpRange, | ||||||
| 2199 | unsigned &msg, | ||||||
| 2200 | CastKind &Kind) { | ||||||
| 2201 | bool IsLValueCast = false; | ||||||
| 2202 | |||||||
| 2203 | DestType = Self.Context.getCanonicalType(DestType); | ||||||
| 2204 | QualType SrcType = SrcExpr.get()->getType(); | ||||||
| 2205 | |||||||
| 2206 | // Is the source an overloaded name? (i.e. &foo) | ||||||
| 2207 | // If so, reinterpret_cast generally can not help us here (13.4, p1, bullet 5) | ||||||
| 2208 | if (SrcType == Self.Context.OverloadTy) { | ||||||
| 2209 | ExprResult FixedExpr = SrcExpr; | ||||||
| 2210 | if (!fixOverloadedReinterpretCastExpr(Self, DestType, FixedExpr)) | ||||||
| 2211 | return TC_NotApplicable; | ||||||
| 2212 | |||||||
| 2213 | assert(FixedExpr.isUsable() && "Invalid result fixing overloaded expr")(static_cast <bool> (FixedExpr.isUsable() && "Invalid result fixing overloaded expr" ) ? void (0) : __assert_fail ("FixedExpr.isUsable() && \"Invalid result fixing overloaded expr\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2213, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 2214 | SrcExpr = FixedExpr; | ||||||
| 2215 | SrcType = SrcExpr.get()->getType(); | ||||||
| 2216 | } | ||||||
| 2217 | |||||||
| 2218 | if (const ReferenceType *DestTypeTmp = DestType->getAs<ReferenceType>()) { | ||||||
| 2219 | if (!SrcExpr.get()->isGLValue()) { | ||||||
| 2220 | // Cannot cast non-glvalue to (lvalue or rvalue) reference type. See the | ||||||
| 2221 | // similar comment in const_cast. | ||||||
| 2222 | msg = diag::err_bad_cxx_cast_rvalue; | ||||||
| 2223 | return TC_NotApplicable; | ||||||
| 2224 | } | ||||||
| 2225 | |||||||
| 2226 | if (!CStyle) { | ||||||
| 2227 | Self.CheckCompatibleReinterpretCast(SrcType, DestType, | ||||||
| 2228 | /*IsDereference=*/false, OpRange); | ||||||
| 2229 | } | ||||||
| 2230 | |||||||
| 2231 | // C++ 5.2.10p10: [...] a reference cast reinterpret_cast<T&>(x) has the | ||||||
| 2232 | // same effect as the conversion *reinterpret_cast<T*>(&x) with the | ||||||
| 2233 | // built-in & and * operators. | ||||||
| 2234 | |||||||
| 2235 | const char *inappropriate = nullptr; | ||||||
| 2236 | switch (SrcExpr.get()->getObjectKind()) { | ||||||
| 2237 | case OK_Ordinary: | ||||||
| 2238 | break; | ||||||
| 2239 | case OK_BitField: | ||||||
| 2240 | msg = diag::err_bad_cxx_cast_bitfield; | ||||||
| 2241 | return TC_NotApplicable; | ||||||
| 2242 | // FIXME: Use a specific diagnostic for the rest of these cases. | ||||||
| 2243 | case OK_VectorComponent: inappropriate = "vector element"; break; | ||||||
| 2244 | case OK_MatrixComponent: | ||||||
| 2245 | inappropriate = "matrix element"; | ||||||
| 2246 | break; | ||||||
| 2247 | case OK_ObjCProperty: inappropriate = "property expression"; break; | ||||||
| 2248 | case OK_ObjCSubscript: inappropriate = "container subscripting expression"; | ||||||
| 2249 | break; | ||||||
| 2250 | } | ||||||
| 2251 | if (inappropriate) { | ||||||
| 2252 | Self.Diag(OpRange.getBegin(), diag::err_bad_reinterpret_cast_reference) | ||||||
| 2253 | << inappropriate << DestType | ||||||
| 2254 | << OpRange << SrcExpr.get()->getSourceRange(); | ||||||
| 2255 | msg = 0; SrcExpr = ExprError(); | ||||||
| 2256 | return TC_NotApplicable; | ||||||
| 2257 | } | ||||||
| 2258 | |||||||
| 2259 | // This code does this transformation for the checked types. | ||||||
| 2260 | DestType = Self.Context.getPointerType(DestTypeTmp->getPointeeType()); | ||||||
| 2261 | SrcType = Self.Context.getPointerType(SrcType); | ||||||
| 2262 | |||||||
| 2263 | IsLValueCast = true; | ||||||
| 2264 | } | ||||||
| 2265 | |||||||
| 2266 | // Canonicalize source for comparison. | ||||||
| 2267 | SrcType = Self.Context.getCanonicalType(SrcType); | ||||||
| 2268 | |||||||
| 2269 | const MemberPointerType *DestMemPtr = DestType->getAs<MemberPointerType>(), | ||||||
| 2270 | *SrcMemPtr = SrcType->getAs<MemberPointerType>(); | ||||||
| 2271 | if (DestMemPtr && SrcMemPtr) { | ||||||
| 2272 | // C++ 5.2.10p9: An rvalue of type "pointer to member of X of type T1" | ||||||
| 2273 | // can be explicitly converted to an rvalue of type "pointer to member | ||||||
| 2274 | // of Y of type T2" if T1 and T2 are both function types or both object | ||||||
| 2275 | // types. | ||||||
| 2276 | if (DestMemPtr->isMemberFunctionPointer() != | ||||||
| 2277 | SrcMemPtr->isMemberFunctionPointer()) | ||||||
| 2278 | return TC_NotApplicable; | ||||||
| 2279 | |||||||
| 2280 | if (Self.Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||
| 2281 | // We need to determine the inheritance model that the class will use if | ||||||
| 2282 | // haven't yet. | ||||||
| 2283 | (void)Self.isCompleteType(OpRange.getBegin(), SrcType); | ||||||
| 2284 | (void)Self.isCompleteType(OpRange.getBegin(), DestType); | ||||||
| 2285 | } | ||||||
| 2286 | |||||||
| 2287 | // Don't allow casting between member pointers of different sizes. | ||||||
| 2288 | if (Self.Context.getTypeSize(DestMemPtr) != | ||||||
| 2289 | Self.Context.getTypeSize(SrcMemPtr)) { | ||||||
| 2290 | msg = diag::err_bad_cxx_cast_member_pointer_size; | ||||||
| 2291 | return TC_Failed; | ||||||
| 2292 | } | ||||||
| 2293 | |||||||
| 2294 | // C++ 5.2.10p2: The reinterpret_cast operator shall not cast away | ||||||
| 2295 | // constness. | ||||||
| 2296 | // A reinterpret_cast followed by a const_cast can, though, so in C-style, | ||||||
| 2297 | // we accept it. | ||||||
| 2298 | if (auto CACK = | ||||||
| 2299 | CastsAwayConstness(Self, SrcType, DestType, /*CheckCVR=*/!CStyle, | ||||||
| 2300 | /*CheckObjCLifetime=*/CStyle)) | ||||||
| 2301 | return getCastAwayConstnessCastKind(CACK, msg); | ||||||
| 2302 | |||||||
| 2303 | // A valid member pointer cast. | ||||||
| 2304 | assert(!IsLValueCast)(static_cast <bool> (!IsLValueCast) ? void (0) : __assert_fail ("!IsLValueCast", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2304, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 2305 | Kind = CK_ReinterpretMemberPointer; | ||||||
| 2306 | return TC_Success; | ||||||
| 2307 | } | ||||||
| 2308 | |||||||
| 2309 | // See below for the enumeral issue. | ||||||
| 2310 | if (SrcType->isNullPtrType() && DestType->isIntegralType(Self.Context)) { | ||||||
| 2311 | // C++0x 5.2.10p4: A pointer can be explicitly converted to any integral | ||||||
| 2312 | // type large enough to hold it. A value of std::nullptr_t can be | ||||||
| 2313 | // converted to an integral type; the conversion has the same meaning | ||||||
| 2314 | // and validity as a conversion of (void*)0 to the integral type. | ||||||
| 2315 | if (Self.Context.getTypeSize(SrcType) > | ||||||
| 2316 | Self.Context.getTypeSize(DestType)) { | ||||||
| 2317 | msg = diag::err_bad_reinterpret_cast_small_int; | ||||||
| 2318 | return TC_Failed; | ||||||
| 2319 | } | ||||||
| 2320 | Kind = CK_PointerToIntegral; | ||||||
| 2321 | return TC_Success; | ||||||
| 2322 | } | ||||||
| 2323 | |||||||
| 2324 | // Allow reinterpret_casts between vectors of the same size and | ||||||
| 2325 | // between vectors and integers of the same size. | ||||||
| 2326 | bool destIsVector = DestType->isVectorType(); | ||||||
| 2327 | bool srcIsVector = SrcType->isVectorType(); | ||||||
| 2328 | if (srcIsVector || destIsVector) { | ||||||
| 2329 | // Allow bitcasting between SVE VLATs and VLSTs, and vice-versa. | ||||||
| 2330 | if (Self.isValidSveBitcast(SrcType, DestType)) { | ||||||
| 2331 | Kind = CK_BitCast; | ||||||
| 2332 | return TC_Success; | ||||||
| 2333 | } | ||||||
| 2334 | |||||||
| 2335 | // The non-vector type, if any, must have integral type. This is | ||||||
| 2336 | // the same rule that C vector casts use; note, however, that enum | ||||||
| 2337 | // types are not integral in C++. | ||||||
| 2338 | if ((!destIsVector && !DestType->isIntegralType(Self.Context)) || | ||||||
| 2339 | (!srcIsVector && !SrcType->isIntegralType(Self.Context))) | ||||||
| 2340 | return TC_NotApplicable; | ||||||
| 2341 | |||||||
| 2342 | // The size we want to consider is eltCount * eltSize. | ||||||
| 2343 | // That's exactly what the lax-conversion rules will check. | ||||||
| 2344 | if (Self.areLaxCompatibleVectorTypes(SrcType, DestType)) { | ||||||
| 2345 | Kind = CK_BitCast; | ||||||
| 2346 | return TC_Success; | ||||||
| 2347 | } | ||||||
| 2348 | |||||||
| 2349 | if (Self.LangOpts.OpenCL && !CStyle) { | ||||||
| 2350 | if (DestType->isExtVectorType() || SrcType->isExtVectorType()) { | ||||||
| 2351 | // FIXME: Allow for reinterpret cast between 3 and 4 element vectors | ||||||
| 2352 | if (Self.areVectorTypesSameSize(SrcType, DestType)) { | ||||||
| 2353 | Kind = CK_BitCast; | ||||||
| 2354 | return TC_Success; | ||||||
| 2355 | } | ||||||
| 2356 | } | ||||||
| 2357 | } | ||||||
| 2358 | |||||||
| 2359 | // Otherwise, pick a reasonable diagnostic. | ||||||
| 2360 | if (!destIsVector) | ||||||
| 2361 | msg = diag::err_bad_cxx_cast_vector_to_scalar_different_size; | ||||||
| 2362 | else if (!srcIsVector) | ||||||
| 2363 | msg = diag::err_bad_cxx_cast_scalar_to_vector_different_size; | ||||||
| 2364 | else | ||||||
| 2365 | msg = diag::err_bad_cxx_cast_vector_to_vector_different_size; | ||||||
| 2366 | |||||||
| 2367 | return TC_Failed; | ||||||
| 2368 | } | ||||||
| 2369 | |||||||
| 2370 | if (SrcType == DestType) { | ||||||
| 2371 | // C++ 5.2.10p2 has a note that mentions that, subject to all other | ||||||
| 2372 | // restrictions, a cast to the same type is allowed so long as it does not | ||||||
| 2373 | // cast away constness. In C++98, the intent was not entirely clear here, | ||||||
| 2374 | // since all other paragraphs explicitly forbid casts to the same type. | ||||||
| 2375 | // C++11 clarifies this case with p2. | ||||||
| 2376 | // | ||||||
| 2377 | // The only allowed types are: integral, enumeration, pointer, or | ||||||
| 2378 | // pointer-to-member types. We also won't restrict Obj-C pointers either. | ||||||
| 2379 | Kind = CK_NoOp; | ||||||
| 2380 | TryCastResult Result = TC_NotApplicable; | ||||||
| 2381 | if (SrcType->isIntegralOrEnumerationType() || | ||||||
| 2382 | SrcType->isAnyPointerType() || | ||||||
| 2383 | SrcType->isMemberPointerType() || | ||||||
| 2384 | SrcType->isBlockPointerType()) { | ||||||
| 2385 | Result = TC_Success; | ||||||
| 2386 | } | ||||||
| 2387 | return Result; | ||||||
| 2388 | } | ||||||
| 2389 | |||||||
| 2390 | bool destIsPtr = DestType->isAnyPointerType() || | ||||||
| 2391 | DestType->isBlockPointerType(); | ||||||
| 2392 | bool srcIsPtr = SrcType->isAnyPointerType() || | ||||||
| 2393 | SrcType->isBlockPointerType(); | ||||||
| 2394 | if (!destIsPtr && !srcIsPtr) { | ||||||
| 2395 | // Except for std::nullptr_t->integer and lvalue->reference, which are | ||||||
| 2396 | // handled above, at least one of the two arguments must be a pointer. | ||||||
| 2397 | return TC_NotApplicable; | ||||||
| 2398 | } | ||||||
| 2399 | |||||||
| 2400 | if (DestType->isIntegralType(Self.Context)) { | ||||||
| 2401 | assert(srcIsPtr && "One type must be a pointer")(static_cast <bool> (srcIsPtr && "One type must be a pointer" ) ? void (0) : __assert_fail ("srcIsPtr && \"One type must be a pointer\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2401, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 2402 | // C++ 5.2.10p4: A pointer can be explicitly converted to any integral | ||||||
| 2403 | // type large enough to hold it; except in Microsoft mode, where the | ||||||
| 2404 | // integral type size doesn't matter (except we don't allow bool). | ||||||
| 2405 | if ((Self.Context.getTypeSize(SrcType) > | ||||||
| 2406 | Self.Context.getTypeSize(DestType))) { | ||||||
| 2407 | bool MicrosoftException = | ||||||
| 2408 | Self.getLangOpts().MicrosoftExt && !DestType->isBooleanType(); | ||||||
| 2409 | if (MicrosoftException) { | ||||||
| 2410 | unsigned Diag = SrcType->isVoidPointerType() | ||||||
| 2411 | ? diag::warn_void_pointer_to_int_cast | ||||||
| 2412 | : diag::warn_pointer_to_int_cast; | ||||||
| 2413 | Self.Diag(OpRange.getBegin(), Diag) << SrcType << DestType << OpRange; | ||||||
| 2414 | } else { | ||||||
| 2415 | msg = diag::err_bad_reinterpret_cast_small_int; | ||||||
| 2416 | return TC_Failed; | ||||||
| 2417 | } | ||||||
| 2418 | } | ||||||
| 2419 | Kind = CK_PointerToIntegral; | ||||||
| 2420 | return TC_Success; | ||||||
| 2421 | } | ||||||
| 2422 | |||||||
| 2423 | if (SrcType->isIntegralOrEnumerationType()) { | ||||||
| 2424 | assert(destIsPtr && "One type must be a pointer")(static_cast <bool> (destIsPtr && "One type must be a pointer" ) ? void (0) : __assert_fail ("destIsPtr && \"One type must be a pointer\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2424, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 2425 | checkIntToPointerCast(CStyle, OpRange, SrcExpr.get(), DestType, Self); | ||||||
| 2426 | // C++ 5.2.10p5: A value of integral or enumeration type can be explicitly | ||||||
| 2427 | // converted to a pointer. | ||||||
| 2428 | // C++ 5.2.10p9: [Note: ...a null pointer constant of integral type is not | ||||||
| 2429 | // necessarily converted to a null pointer value.] | ||||||
| 2430 | Kind = CK_IntegralToPointer; | ||||||
| 2431 | return TC_Success; | ||||||
| 2432 | } | ||||||
| 2433 | |||||||
| 2434 | if (!destIsPtr || !srcIsPtr) { | ||||||
| 2435 | // With the valid non-pointer conversions out of the way, we can be even | ||||||
| 2436 | // more stringent. | ||||||
| 2437 | return TC_NotApplicable; | ||||||
| 2438 | } | ||||||
| 2439 | |||||||
| 2440 | // Cannot convert between block pointers and Objective-C object pointers. | ||||||
| 2441 | if ((SrcType->isBlockPointerType() && DestType->isObjCObjectPointerType()) || | ||||||
| 2442 | (DestType->isBlockPointerType() && SrcType->isObjCObjectPointerType())) | ||||||
| 2443 | return TC_NotApplicable; | ||||||
| 2444 | |||||||
| 2445 | // C++ 5.2.10p2: The reinterpret_cast operator shall not cast away constness. | ||||||
| 2446 | // The C-style cast operator can. | ||||||
| 2447 | TryCastResult SuccessResult = TC_Success; | ||||||
| 2448 | if (auto CACK = | ||||||
| 2449 | CastsAwayConstness(Self, SrcType, DestType, /*CheckCVR=*/!CStyle, | ||||||
| 2450 | /*CheckObjCLifetime=*/CStyle)) | ||||||
| 2451 | SuccessResult = getCastAwayConstnessCastKind(CACK, msg); | ||||||
| 2452 | |||||||
| 2453 | if (IsAddressSpaceConversion(SrcType, DestType)) { | ||||||
| 2454 | Kind = CK_AddressSpaceConversion; | ||||||
| 2455 | assert(SrcType->isPointerType() && DestType->isPointerType())(static_cast <bool> (SrcType->isPointerType() && DestType->isPointerType()) ? void (0) : __assert_fail ("SrcType->isPointerType() && DestType->isPointerType()" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2455, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 2456 | if (!CStyle && | ||||||
| 2457 | !DestType->getPointeeType().getQualifiers().isAddressSpaceSupersetOf( | ||||||
| 2458 | SrcType->getPointeeType().getQualifiers())) { | ||||||
| 2459 | SuccessResult = TC_Failed; | ||||||
| 2460 | } | ||||||
| 2461 | } else if (IsLValueCast) { | ||||||
| 2462 | Kind = CK_LValueBitCast; | ||||||
| 2463 | } else if (DestType->isObjCObjectPointerType()) { | ||||||
| 2464 | Kind = Self.PrepareCastToObjCObjectPointer(SrcExpr); | ||||||
| 2465 | } else if (DestType->isBlockPointerType()) { | ||||||
| 2466 | if (!SrcType->isBlockPointerType()) { | ||||||
| 2467 | Kind = CK_AnyPointerToBlockPointerCast; | ||||||
| 2468 | } else { | ||||||
| 2469 | Kind = CK_BitCast; | ||||||
| 2470 | } | ||||||
| 2471 | } else { | ||||||
| 2472 | Kind = CK_BitCast; | ||||||
| 2473 | } | ||||||
| 2474 | |||||||
| 2475 | // Any pointer can be cast to an Objective-C pointer type with a C-style | ||||||
| 2476 | // cast. | ||||||
| 2477 | if (CStyle && DestType->isObjCObjectPointerType()) { | ||||||
| 2478 | return SuccessResult; | ||||||
| 2479 | } | ||||||
| 2480 | if (CStyle) | ||||||
| 2481 | DiagnoseCastOfObjCSEL(Self, SrcExpr, DestType); | ||||||
| 2482 | |||||||
| 2483 | DiagnoseCallingConvCast(Self, SrcExpr, DestType, OpRange); | ||||||
| 2484 | |||||||
| 2485 | // Not casting away constness, so the only remaining check is for compatible | ||||||
| 2486 | // pointer categories. | ||||||
| 2487 | |||||||
| 2488 | if (SrcType->isFunctionPointerType()) { | ||||||
| 2489 | if (DestType->isFunctionPointerType()) { | ||||||
| 2490 | // C++ 5.2.10p6: A pointer to a function can be explicitly converted to | ||||||
| 2491 | // a pointer to a function of a different type. | ||||||
| 2492 | return SuccessResult; | ||||||
| 2493 | } | ||||||
| 2494 | |||||||
| 2495 | // C++0x 5.2.10p8: Converting a pointer to a function into a pointer to | ||||||
| 2496 | // an object type or vice versa is conditionally-supported. | ||||||
| 2497 | // Compilers support it in C++03 too, though, because it's necessary for | ||||||
| 2498 | // casting the return value of dlsym() and GetProcAddress(). | ||||||
| 2499 | // FIXME: Conditionally-supported behavior should be configurable in the | ||||||
| 2500 | // TargetInfo or similar. | ||||||
| 2501 | Self.Diag(OpRange.getBegin(), | ||||||
| 2502 | Self.getLangOpts().CPlusPlus11 ? | ||||||
| 2503 | diag::warn_cxx98_compat_cast_fn_obj : diag::ext_cast_fn_obj) | ||||||
| 2504 | << OpRange; | ||||||
| 2505 | return SuccessResult; | ||||||
| 2506 | } | ||||||
| 2507 | |||||||
| 2508 | if (DestType->isFunctionPointerType()) { | ||||||
| 2509 | // See above. | ||||||
| 2510 | Self.Diag(OpRange.getBegin(), | ||||||
| 2511 | Self.getLangOpts().CPlusPlus11 ? | ||||||
| 2512 | diag::warn_cxx98_compat_cast_fn_obj : diag::ext_cast_fn_obj) | ||||||
| 2513 | << OpRange; | ||||||
| 2514 | return SuccessResult; | ||||||
| 2515 | } | ||||||
| 2516 | |||||||
| 2517 | // Diagnose address space conversion in nested pointers. | ||||||
| 2518 | QualType DestPtee = DestType->getPointeeType().isNull() | ||||||
| 2519 | ? DestType->getPointeeType() | ||||||
| 2520 | : DestType->getPointeeType()->getPointeeType(); | ||||||
| 2521 | QualType SrcPtee = SrcType->getPointeeType().isNull() | ||||||
| 2522 | ? SrcType->getPointeeType() | ||||||
| 2523 | : SrcType->getPointeeType()->getPointeeType(); | ||||||
| 2524 | while (!DestPtee.isNull() && !SrcPtee.isNull()) { | ||||||
| 2525 | if (DestPtee.getAddressSpace() != SrcPtee.getAddressSpace()) { | ||||||
| 2526 | Self.Diag(OpRange.getBegin(), | ||||||
| 2527 | diag::warn_bad_cxx_cast_nested_pointer_addr_space) | ||||||
| 2528 | << CStyle << SrcType << DestType << SrcExpr.get()->getSourceRange(); | ||||||
| 2529 | break; | ||||||
| 2530 | } | ||||||
| 2531 | DestPtee = DestPtee->getPointeeType(); | ||||||
| 2532 | SrcPtee = SrcPtee->getPointeeType(); | ||||||
| 2533 | } | ||||||
| 2534 | |||||||
| 2535 | // C++ 5.2.10p7: A pointer to an object can be explicitly converted to | ||||||
| 2536 | // a pointer to an object of different type. | ||||||
| 2537 | // Void pointers are not specified, but supported by every compiler out there. | ||||||
| 2538 | // So we finish by allowing everything that remains - it's got to be two | ||||||
| 2539 | // object pointers. | ||||||
| 2540 | return SuccessResult; | ||||||
| 2541 | } | ||||||
| 2542 | |||||||
| 2543 | static TryCastResult TryAddressSpaceCast(Sema &Self, ExprResult &SrcExpr, | ||||||
| 2544 | QualType DestType, bool CStyle, | ||||||
| 2545 | unsigned &msg, CastKind &Kind) { | ||||||
| 2546 | if (!Self.getLangOpts().OpenCL) | ||||||
| 2547 | // FIXME: As compiler doesn't have any information about overlapping addr | ||||||
| 2548 | // spaces at the moment we have to be permissive here. | ||||||
| 2549 | return TC_NotApplicable; | ||||||
| 2550 | // Even though the logic below is general enough and can be applied to | ||||||
| 2551 | // non-OpenCL mode too, we fast-path above because no other languages | ||||||
| 2552 | // define overlapping address spaces currently. | ||||||
| 2553 | auto SrcType = SrcExpr.get()->getType(); | ||||||
| 2554 | // FIXME: Should this be generalized to references? The reference parameter | ||||||
| 2555 | // however becomes a reference pointee type here and therefore rejected. | ||||||
| 2556 | // Perhaps this is the right behavior though according to C++. | ||||||
| 2557 | auto SrcPtrType = SrcType->getAs<PointerType>(); | ||||||
| 2558 | if (!SrcPtrType) | ||||||
| 2559 | return TC_NotApplicable; | ||||||
| 2560 | auto DestPtrType = DestType->getAs<PointerType>(); | ||||||
| 2561 | if (!DestPtrType) | ||||||
| 2562 | return TC_NotApplicable; | ||||||
| 2563 | auto SrcPointeeType = SrcPtrType->getPointeeType(); | ||||||
| 2564 | auto DestPointeeType = DestPtrType->getPointeeType(); | ||||||
| 2565 | if (!DestPointeeType.isAddressSpaceOverlapping(SrcPointeeType)) { | ||||||
| 2566 | msg = diag::err_bad_cxx_cast_addr_space_mismatch; | ||||||
| 2567 | return TC_Failed; | ||||||
| 2568 | } | ||||||
| 2569 | auto SrcPointeeTypeWithoutAS = | ||||||
| 2570 | Self.Context.removeAddrSpaceQualType(SrcPointeeType.getCanonicalType()); | ||||||
| 2571 | auto DestPointeeTypeWithoutAS = | ||||||
| 2572 | Self.Context.removeAddrSpaceQualType(DestPointeeType.getCanonicalType()); | ||||||
| 2573 | if (Self.Context.hasSameType(SrcPointeeTypeWithoutAS, | ||||||
| 2574 | DestPointeeTypeWithoutAS)) { | ||||||
| 2575 | Kind = SrcPointeeType.getAddressSpace() == DestPointeeType.getAddressSpace() | ||||||
| 2576 | ? CK_NoOp | ||||||
| 2577 | : CK_AddressSpaceConversion; | ||||||
| 2578 | return TC_Success; | ||||||
| 2579 | } else { | ||||||
| 2580 | return TC_NotApplicable; | ||||||
| 2581 | } | ||||||
| 2582 | } | ||||||
| 2583 | |||||||
| 2584 | void CastOperation::checkAddressSpaceCast(QualType SrcType, QualType DestType) { | ||||||
| 2585 | // In OpenCL only conversions between pointers to objects in overlapping | ||||||
| 2586 | // addr spaces are allowed. v2.0 s6.5.5 - Generic addr space overlaps | ||||||
| 2587 | // with any named one, except for constant. | ||||||
| 2588 | |||||||
| 2589 | // Converting the top level pointee addrspace is permitted for compatible | ||||||
| 2590 | // addrspaces (such as 'generic int *' to 'local int *' or vice versa), but | ||||||
| 2591 | // if any of the nested pointee addrspaces differ, we emit a warning | ||||||
| 2592 | // regardless of addrspace compatibility. This makes | ||||||
| 2593 | // local int ** p; | ||||||
| 2594 | // return (generic int **) p; | ||||||
| 2595 | // warn even though local -> generic is permitted. | ||||||
| 2596 | if (Self.getLangOpts().OpenCL) { | ||||||
| 2597 | const Type *DestPtr, *SrcPtr; | ||||||
| 2598 | bool Nested = false; | ||||||
| 2599 | unsigned DiagID = diag::err_typecheck_incompatible_address_space; | ||||||
| 2600 | DestPtr = Self.getASTContext().getCanonicalType(DestType.getTypePtr()), | ||||||
| 2601 | SrcPtr = Self.getASTContext().getCanonicalType(SrcType.getTypePtr()); | ||||||
| 2602 | |||||||
| 2603 | while (isa<PointerType>(DestPtr) && isa<PointerType>(SrcPtr)) { | ||||||
| 2604 | const PointerType *DestPPtr = cast<PointerType>(DestPtr); | ||||||
| 2605 | const PointerType *SrcPPtr = cast<PointerType>(SrcPtr); | ||||||
| 2606 | QualType DestPPointee = DestPPtr->getPointeeType(); | ||||||
| 2607 | QualType SrcPPointee = SrcPPtr->getPointeeType(); | ||||||
| 2608 | if (Nested | ||||||
| 2609 | ? DestPPointee.getAddressSpace() != SrcPPointee.getAddressSpace() | ||||||
| 2610 | : !DestPPointee.isAddressSpaceOverlapping(SrcPPointee)) { | ||||||
| 2611 | Self.Diag(OpRange.getBegin(), DiagID) | ||||||
| 2612 | << SrcType << DestType << Sema::AA_Casting | ||||||
| 2613 | << SrcExpr.get()->getSourceRange(); | ||||||
| 2614 | if (!Nested) | ||||||
| 2615 | SrcExpr = ExprError(); | ||||||
| 2616 | return; | ||||||
| 2617 | } | ||||||
| 2618 | |||||||
| 2619 | DestPtr = DestPPtr->getPointeeType().getTypePtr(); | ||||||
| 2620 | SrcPtr = SrcPPtr->getPointeeType().getTypePtr(); | ||||||
| 2621 | Nested = true; | ||||||
| 2622 | DiagID = diag::ext_nested_pointer_qualifier_mismatch; | ||||||
| 2623 | } | ||||||
| 2624 | } | ||||||
| 2625 | } | ||||||
| 2626 | |||||||
| 2627 | bool Sema::ShouldSplatAltivecScalarInCast(const VectorType *VecTy) { | ||||||
| 2628 | bool SrcCompatXL = this->getLangOpts().getAltivecSrcCompat() == | ||||||
| 2629 | LangOptions::AltivecSrcCompatKind::XL; | ||||||
| 2630 | VectorType::VectorKind VKind = VecTy->getVectorKind(); | ||||||
| 2631 | |||||||
| 2632 | if ((VKind == VectorType::AltiVecVector) || | ||||||
| 2633 | (SrcCompatXL && ((VKind == VectorType::AltiVecBool) || | ||||||
| 2634 | (VKind == VectorType::AltiVecPixel)))) { | ||||||
| 2635 | return true; | ||||||
| 2636 | } | ||||||
| 2637 | return false; | ||||||
| 2638 | } | ||||||
| 2639 | |||||||
| 2640 | void CastOperation::CheckCXXCStyleCast(bool FunctionalStyle, | ||||||
| 2641 | bool ListInitialization) { | ||||||
| 2642 | assert(Self.getLangOpts().CPlusPlus)(static_cast <bool> (Self.getLangOpts().CPlusPlus) ? void (0) : __assert_fail ("Self.getLangOpts().CPlusPlus", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2642, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 2643 | |||||||
| 2644 | // Handle placeholders. | ||||||
| 2645 | if (isPlaceholder()) { | ||||||
| 2646 | // C-style casts can resolve __unknown_any types. | ||||||
| 2647 | if (claimPlaceholder(BuiltinType::UnknownAny)) { | ||||||
| 2648 | SrcExpr = Self.checkUnknownAnyCast(DestRange, DestType, | ||||||
| 2649 | SrcExpr.get(), Kind, | ||||||
| 2650 | ValueKind, BasePath); | ||||||
| 2651 | return; | ||||||
| 2652 | } | ||||||
| 2653 | |||||||
| 2654 | checkNonOverloadPlaceholders(); | ||||||
| 2655 | if (SrcExpr.isInvalid()) | ||||||
| 2656 | return; | ||||||
| 2657 | } | ||||||
| 2658 | |||||||
| 2659 | // C++ 5.2.9p4: Any expression can be explicitly converted to type "cv void". | ||||||
| 2660 | // This test is outside everything else because it's the only case where | ||||||
| 2661 | // a non-lvalue-reference target type does not lead to decay. | ||||||
| 2662 | if (DestType->isVoidType()) { | ||||||
| 2663 | Kind = CK_ToVoid; | ||||||
| 2664 | |||||||
| 2665 | if (claimPlaceholder(BuiltinType::Overload)) { | ||||||
| 2666 | Self.ResolveAndFixSingleFunctionTemplateSpecialization( | ||||||
| 2667 | SrcExpr, /* Decay Function to ptr */ false, | ||||||
| 2668 | /* Complain */ true, DestRange, DestType, | ||||||
| 2669 | diag::err_bad_cstyle_cast_overload); | ||||||
| 2670 | if (SrcExpr.isInvalid()) | ||||||
| 2671 | return; | ||||||
| 2672 | } | ||||||
| 2673 | |||||||
| 2674 | SrcExpr = Self.IgnoredValueConversions(SrcExpr.get()); | ||||||
| 2675 | return; | ||||||
| 2676 | } | ||||||
| 2677 | |||||||
| 2678 | // If the type is dependent, we won't do any other semantic analysis now. | ||||||
| 2679 | if (DestType->isDependentType() || SrcExpr.get()->isTypeDependent() || | ||||||
| 2680 | SrcExpr.get()->isValueDependent()) { | ||||||
| 2681 | assert(Kind == CK_Dependent)(static_cast <bool> (Kind == CK_Dependent) ? void (0) : __assert_fail ("Kind == CK_Dependent", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2681, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 2682 | return; | ||||||
| 2683 | } | ||||||
| 2684 | |||||||
| 2685 | if (ValueKind == VK_PRValue && !DestType->isRecordType() && | ||||||
| 2686 | !isPlaceholder(BuiltinType::Overload)) { | ||||||
| 2687 | SrcExpr = Self.DefaultFunctionArrayLvalueConversion(SrcExpr.get()); | ||||||
| 2688 | if (SrcExpr.isInvalid()) | ||||||
| 2689 | return; | ||||||
| 2690 | } | ||||||
| 2691 | |||||||
| 2692 | // AltiVec vector initialization with a single literal. | ||||||
| 2693 | if (const VectorType *vecTy = DestType->getAs<VectorType>()) | ||||||
| 2694 | if (Self.ShouldSplatAltivecScalarInCast(vecTy) && | ||||||
| 2695 | (SrcExpr.get()->getType()->isIntegerType() || | ||||||
| 2696 | SrcExpr.get()->getType()->isFloatingType())) { | ||||||
| 2697 | Kind = CK_VectorSplat; | ||||||
| 2698 | SrcExpr = Self.prepareVectorSplat(DestType, SrcExpr.get()); | ||||||
| 2699 | return; | ||||||
| 2700 | } | ||||||
| 2701 | |||||||
| 2702 | // C++ [expr.cast]p5: The conversions performed by | ||||||
| 2703 | // - a const_cast, | ||||||
| 2704 | // - a static_cast, | ||||||
| 2705 | // - a static_cast followed by a const_cast, | ||||||
| 2706 | // - a reinterpret_cast, or | ||||||
| 2707 | // - a reinterpret_cast followed by a const_cast, | ||||||
| 2708 | // can be performed using the cast notation of explicit type conversion. | ||||||
| 2709 | // [...] If a conversion can be interpreted in more than one of the ways | ||||||
| 2710 | // listed above, the interpretation that appears first in the list is used, | ||||||
| 2711 | // even if a cast resulting from that interpretation is ill-formed. | ||||||
| 2712 | // In plain language, this means trying a const_cast ... | ||||||
| 2713 | // Note that for address space we check compatibility after const_cast. | ||||||
| 2714 | unsigned msg = diag::err_bad_cxx_cast_generic; | ||||||
| 2715 | TryCastResult tcr = TryConstCast(Self, SrcExpr, DestType, | ||||||
| 2716 | /*CStyle*/ true, msg); | ||||||
| 2717 | if (SrcExpr.isInvalid()) | ||||||
| 2718 | return; | ||||||
| 2719 | if (isValidCast(tcr)) | ||||||
| 2720 | Kind = CK_NoOp; | ||||||
| 2721 | |||||||
| 2722 | Sema::CheckedConversionKind CCK = | ||||||
| 2723 | FunctionalStyle ? Sema::CCK_FunctionalCast : Sema::CCK_CStyleCast; | ||||||
| 2724 | if (tcr == TC_NotApplicable) { | ||||||
| 2725 | tcr = TryAddressSpaceCast(Self, SrcExpr, DestType, /*CStyle*/ true, msg, | ||||||
| 2726 | Kind); | ||||||
| 2727 | if (SrcExpr.isInvalid()) | ||||||
| 2728 | return; | ||||||
| 2729 | |||||||
| 2730 | if (tcr == TC_NotApplicable) { | ||||||
| 2731 | // ... or if that is not possible, a static_cast, ignoring const and | ||||||
| 2732 | // addr space, ... | ||||||
| 2733 | tcr = TryStaticCast(Self, SrcExpr, DestType, CCK, OpRange, msg, Kind, | ||||||
| 2734 | BasePath, ListInitialization); | ||||||
| 2735 | if (SrcExpr.isInvalid()) | ||||||
| 2736 | return; | ||||||
| 2737 | |||||||
| 2738 | if (tcr == TC_NotApplicable) { | ||||||
| 2739 | // ... and finally a reinterpret_cast, ignoring const and addr space. | ||||||
| 2740 | tcr = TryReinterpretCast(Self, SrcExpr, DestType, /*CStyle*/ true, | ||||||
| 2741 | OpRange, msg, Kind); | ||||||
| 2742 | if (SrcExpr.isInvalid()) | ||||||
| 2743 | return; | ||||||
| 2744 | } | ||||||
| 2745 | } | ||||||
| 2746 | } | ||||||
| 2747 | |||||||
| 2748 | if (Self.getLangOpts().allowsNonTrivialObjCLifetimeQualifiers() && | ||||||
| 2749 | isValidCast(tcr)) | ||||||
| 2750 | checkObjCConversion(CCK); | ||||||
| 2751 | |||||||
| 2752 | if (tcr != TC_Success && msg != 0) { | ||||||
| 2753 | if (SrcExpr.get()->getType() == Self.Context.OverloadTy) { | ||||||
| 2754 | DeclAccessPair Found; | ||||||
| 2755 | FunctionDecl *Fn = Self.ResolveAddressOfOverloadedFunction(SrcExpr.get(), | ||||||
| 2756 | DestType, | ||||||
| 2757 | /*Complain*/ true, | ||||||
| 2758 | Found); | ||||||
| 2759 | if (Fn) { | ||||||
| 2760 | // If DestType is a function type (not to be confused with the function | ||||||
| 2761 | // pointer type), it will be possible to resolve the function address, | ||||||
| 2762 | // but the type cast should be considered as failure. | ||||||
| 2763 | OverloadExpr *OE = OverloadExpr::find(SrcExpr.get()).Expression; | ||||||
| 2764 | Self.Diag(OpRange.getBegin(), diag::err_bad_cstyle_cast_overload) | ||||||
| 2765 | << OE->getName() << DestType << OpRange | ||||||
| 2766 | << OE->getQualifierLoc().getSourceRange(); | ||||||
| 2767 | Self.NoteAllOverloadCandidates(SrcExpr.get()); | ||||||
| 2768 | } | ||||||
| 2769 | } else { | ||||||
| 2770 | diagnoseBadCast(Self, msg, (FunctionalStyle ? CT_Functional : CT_CStyle), | ||||||
| 2771 | OpRange, SrcExpr.get(), DestType, ListInitialization); | ||||||
| 2772 | } | ||||||
| 2773 | } | ||||||
| 2774 | |||||||
| 2775 | if (isValidCast(tcr)) { | ||||||
| 2776 | if (Kind == CK_BitCast) | ||||||
| 2777 | checkCastAlign(); | ||||||
| 2778 | |||||||
| 2779 | if (!checkCastFunctionType(Self, SrcExpr, DestType)) | ||||||
| 2780 | Self.Diag(OpRange.getBegin(), diag::warn_cast_function_type) | ||||||
| 2781 | << SrcExpr.get()->getType() << DestType << OpRange; | ||||||
| 2782 | |||||||
| 2783 | } else { | ||||||
| 2784 | SrcExpr = ExprError(); | ||||||
| 2785 | } | ||||||
| 2786 | } | ||||||
| 2787 | |||||||
| 2788 | /// DiagnoseBadFunctionCast - Warn whenever a function call is cast to a | ||||||
| 2789 | /// non-matching type. Such as enum function call to int, int call to | ||||||
| 2790 | /// pointer; etc. Cast to 'void' is an exception. | ||||||
| 2791 | static void DiagnoseBadFunctionCast(Sema &Self, const ExprResult &SrcExpr, | ||||||
| 2792 | QualType DestType) { | ||||||
| 2793 | if (Self.Diags.isIgnored(diag::warn_bad_function_cast, | ||||||
| 2794 | SrcExpr.get()->getExprLoc())) | ||||||
| 2795 | return; | ||||||
| 2796 | |||||||
| 2797 | if (!isa<CallExpr>(SrcExpr.get())) | ||||||
| 2798 | return; | ||||||
| 2799 | |||||||
| 2800 | QualType SrcType = SrcExpr.get()->getType(); | ||||||
| 2801 | if (DestType.getUnqualifiedType()->isVoidType()) | ||||||
| 2802 | return; | ||||||
| 2803 | if ((SrcType->isAnyPointerType() || SrcType->isBlockPointerType()) | ||||||
| 2804 | && (DestType->isAnyPointerType() || DestType->isBlockPointerType())) | ||||||
| 2805 | return; | ||||||
| 2806 | if (SrcType->isIntegerType() && DestType->isIntegerType() && | ||||||
| 2807 | (SrcType->isBooleanType() == DestType->isBooleanType()) && | ||||||
| 2808 | (SrcType->isEnumeralType() == DestType->isEnumeralType())) | ||||||
| 2809 | return; | ||||||
| 2810 | if (SrcType->isRealFloatingType() && DestType->isRealFloatingType()) | ||||||
| 2811 | return; | ||||||
| 2812 | if (SrcType->isEnumeralType() && DestType->isEnumeralType()) | ||||||
| 2813 | return; | ||||||
| 2814 | if (SrcType->isComplexType() && DestType->isComplexType()) | ||||||
| 2815 | return; | ||||||
| 2816 | if (SrcType->isComplexIntegerType() && DestType->isComplexIntegerType()) | ||||||
| 2817 | return; | ||||||
| 2818 | if (SrcType->isFixedPointType() && DestType->isFixedPointType()) | ||||||
| 2819 | return; | ||||||
| 2820 | |||||||
| 2821 | Self.Diag(SrcExpr.get()->getExprLoc(), | ||||||
| 2822 | diag::warn_bad_function_cast) | ||||||
| 2823 | << SrcType << DestType << SrcExpr.get()->getSourceRange(); | ||||||
| 2824 | } | ||||||
| 2825 | |||||||
| 2826 | /// Check the semantics of a C-style cast operation, in C. | ||||||
| 2827 | void CastOperation::CheckCStyleCast() { | ||||||
| 2828 | assert(!Self.getLangOpts().CPlusPlus)(static_cast <bool> (!Self.getLangOpts().CPlusPlus) ? void (0) : __assert_fail ("!Self.getLangOpts().CPlusPlus", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2828, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 2829 | |||||||
| 2830 | // C-style casts can resolve __unknown_any types. | ||||||
| 2831 | if (claimPlaceholder(BuiltinType::UnknownAny)) { | ||||||
| 2832 | SrcExpr = Self.checkUnknownAnyCast(DestRange, DestType, | ||||||
| 2833 | SrcExpr.get(), Kind, | ||||||
| 2834 | ValueKind, BasePath); | ||||||
| 2835 | return; | ||||||
| 2836 | } | ||||||
| 2837 | |||||||
| 2838 | // C99 6.5.4p2: the cast type needs to be void or scalar and the expression | ||||||
| 2839 | // type needs to be scalar. | ||||||
| 2840 | if (DestType->isVoidType()) { | ||||||
| 2841 | // We don't necessarily do lvalue-to-rvalue conversions on this. | ||||||
| 2842 | SrcExpr = Self.IgnoredValueConversions(SrcExpr.get()); | ||||||
| 2843 | if (SrcExpr.isInvalid()) | ||||||
| 2844 | return; | ||||||
| 2845 | |||||||
| 2846 | // Cast to void allows any expr type. | ||||||
| 2847 | Kind = CK_ToVoid; | ||||||
| 2848 | return; | ||||||
| 2849 | } | ||||||
| 2850 | |||||||
| 2851 | // If the type is dependent, we won't do any other semantic analysis now. | ||||||
| 2852 | if (Self.getASTContext().isDependenceAllowed() && | ||||||
| 2853 | (DestType->isDependentType() || SrcExpr.get()->isTypeDependent() || | ||||||
| 2854 | SrcExpr.get()->isValueDependent())) { | ||||||
| 2855 | assert((DestType->containsErrors() || SrcExpr.get()->containsErrors() ||(static_cast <bool> ((DestType->containsErrors() || SrcExpr .get()->containsErrors() || SrcExpr.get()->containsErrors ()) && "should only occur in error-recovery path.") ? void (0) : __assert_fail ("(DestType->containsErrors() || SrcExpr.get()->containsErrors() || SrcExpr.get()->containsErrors()) && \"should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2857, __extension__ __PRETTY_FUNCTION__)) | ||||||
| 2856 | SrcExpr.get()->containsErrors()) &&(static_cast <bool> ((DestType->containsErrors() || SrcExpr .get()->containsErrors() || SrcExpr.get()->containsErrors ()) && "should only occur in error-recovery path.") ? void (0) : __assert_fail ("(DestType->containsErrors() || SrcExpr.get()->containsErrors() || SrcExpr.get()->containsErrors()) && \"should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2857, __extension__ __PRETTY_FUNCTION__)) | ||||||
| 2857 | "should only occur in error-recovery path.")(static_cast <bool> ((DestType->containsErrors() || SrcExpr .get()->containsErrors() || SrcExpr.get()->containsErrors ()) && "should only occur in error-recovery path.") ? void (0) : __assert_fail ("(DestType->containsErrors() || SrcExpr.get()->containsErrors() || SrcExpr.get()->containsErrors()) && \"should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2857, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 2858 | assert(Kind == CK_Dependent)(static_cast <bool> (Kind == CK_Dependent) ? void (0) : __assert_fail ("Kind == CK_Dependent", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2858, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 2859 | return; | ||||||
| 2860 | } | ||||||
| 2861 | |||||||
| 2862 | // Overloads are allowed with C extensions, so we need to support them. | ||||||
| 2863 | if (SrcExpr.get()->getType() == Self.Context.OverloadTy) { | ||||||
| 2864 | DeclAccessPair DAP; | ||||||
| 2865 | if (FunctionDecl *FD = Self.ResolveAddressOfOverloadedFunction( | ||||||
| 2866 | SrcExpr.get(), DestType, /*Complain=*/true, DAP)) | ||||||
| 2867 | SrcExpr = Self.FixOverloadedFunctionReference(SrcExpr.get(), DAP, FD); | ||||||
| 2868 | else | ||||||
| 2869 | return; | ||||||
| 2870 | assert(SrcExpr.isUsable())(static_cast <bool> (SrcExpr.isUsable()) ? void (0) : __assert_fail ("SrcExpr.isUsable()", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2870, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 2871 | } | ||||||
| 2872 | SrcExpr = Self.DefaultFunctionArrayLvalueConversion(SrcExpr.get()); | ||||||
| 2873 | if (SrcExpr.isInvalid()) | ||||||
| 2874 | return; | ||||||
| 2875 | QualType SrcType = SrcExpr.get()->getType(); | ||||||
| 2876 | |||||||
| 2877 | assert(!SrcType->isPlaceholderType())(static_cast <bool> (!SrcType->isPlaceholderType()) ? void (0) : __assert_fail ("!SrcType->isPlaceholderType()" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 2877, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 2878 | |||||||
| 2879 | checkAddressSpaceCast(SrcType, DestType); | ||||||
| 2880 | if (SrcExpr.isInvalid()) | ||||||
| 2881 | return; | ||||||
| 2882 | |||||||
| 2883 | if (Self.RequireCompleteType(OpRange.getBegin(), DestType, | ||||||
| 2884 | diag::err_typecheck_cast_to_incomplete)) { | ||||||
| 2885 | SrcExpr = ExprError(); | ||||||
| 2886 | return; | ||||||
| 2887 | } | ||||||
| 2888 | |||||||
| 2889 | // Allow casting a sizeless built-in type to itself. | ||||||
| 2890 | if (DestType->isSizelessBuiltinType() && | ||||||
| 2891 | Self.Context.hasSameUnqualifiedType(DestType, SrcType)) { | ||||||
| 2892 | Kind = CK_NoOp; | ||||||
| 2893 | return; | ||||||
| 2894 | } | ||||||
| 2895 | |||||||
| 2896 | // Allow bitcasting between compatible SVE vector types. | ||||||
| 2897 | if ((SrcType->isVectorType() || DestType->isVectorType()) && | ||||||
| 2898 | Self.isValidSveBitcast(SrcType, DestType)) { | ||||||
| 2899 | Kind = CK_BitCast; | ||||||
| 2900 | return; | ||||||
| 2901 | } | ||||||
| 2902 | |||||||
| 2903 | if (!DestType->isScalarType() && !DestType->isVectorType() && | ||||||
| 2904 | !DestType->isMatrixType()) { | ||||||
| 2905 | const RecordType *DestRecordTy = DestType->getAs<RecordType>(); | ||||||
| 2906 | |||||||
| 2907 | if (DestRecordTy && Self.Context.hasSameUnqualifiedType(DestType, SrcType)){ | ||||||
| 2908 | // GCC struct/union extension: allow cast to self. | ||||||
| 2909 | Self.Diag(OpRange.getBegin(), diag::ext_typecheck_cast_nonscalar) | ||||||
| 2910 | << DestType << SrcExpr.get()->getSourceRange(); | ||||||
| 2911 | Kind = CK_NoOp; | ||||||
| 2912 | return; | ||||||
| 2913 | } | ||||||
| 2914 | |||||||
| 2915 | // GCC's cast to union extension. | ||||||
| 2916 | if (DestRecordTy && DestRecordTy->getDecl()->isUnion()) { | ||||||
| 2917 | RecordDecl *RD = DestRecordTy->getDecl(); | ||||||
| 2918 | if (CastExpr::getTargetFieldForToUnionCast(RD, SrcType)) { | ||||||
| 2919 | Self.Diag(OpRange.getBegin(), diag::ext_typecheck_cast_to_union) | ||||||
| 2920 | << SrcExpr.get()->getSourceRange(); | ||||||
| 2921 | Kind = CK_ToUnion; | ||||||
| 2922 | return; | ||||||
| 2923 | } else { | ||||||
| 2924 | Self.Diag(OpRange.getBegin(), diag::err_typecheck_cast_to_union_no_type) | ||||||
| 2925 | << SrcType << SrcExpr.get()->getSourceRange(); | ||||||
| 2926 | SrcExpr = ExprError(); | ||||||
| 2927 | return; | ||||||
| 2928 | } | ||||||
| 2929 | } | ||||||
| 2930 | |||||||
| 2931 | // OpenCL v2.0 s6.13.10 - Allow casts from '0' to event_t type. | ||||||
| 2932 | if (Self.getLangOpts().OpenCL && DestType->isEventT()) { | ||||||
| 2933 | Expr::EvalResult Result; | ||||||
| 2934 | if (SrcExpr.get()->EvaluateAsInt(Result, Self.Context)) { | ||||||
| 2935 | llvm::APSInt CastInt = Result.Val.getInt(); | ||||||
| 2936 | if (0 == CastInt) { | ||||||
| 2937 | Kind = CK_ZeroToOCLOpaqueType; | ||||||
| 2938 | return; | ||||||
| 2939 | } | ||||||
| 2940 | Self.Diag(OpRange.getBegin(), | ||||||
| 2941 | diag::err_opencl_cast_non_zero_to_event_t) | ||||||
| 2942 | << toString(CastInt, 10) << SrcExpr.get()->getSourceRange(); | ||||||
| 2943 | SrcExpr = ExprError(); | ||||||
| 2944 | return; | ||||||
| 2945 | } | ||||||
| 2946 | } | ||||||
| 2947 | |||||||
| 2948 | // Reject any other conversions to non-scalar types. | ||||||
| 2949 | Self.Diag(OpRange.getBegin(), diag::err_typecheck_cond_expect_scalar) | ||||||
| 2950 | << DestType << SrcExpr.get()->getSourceRange(); | ||||||
| 2951 | SrcExpr = ExprError(); | ||||||
| 2952 | return; | ||||||
| 2953 | } | ||||||
| 2954 | |||||||
| 2955 | // The type we're casting to is known to be a scalar, a vector, or a matrix. | ||||||
| 2956 | |||||||
| 2957 | // Require the operand to be a scalar, a vector, or a matrix. | ||||||
| 2958 | if (!SrcType->isScalarType() && !SrcType->isVectorType() && | ||||||
| 2959 | !SrcType->isMatrixType()) { | ||||||
| 2960 | Self.Diag(SrcExpr.get()->getExprLoc(), | ||||||
| 2961 | diag::err_typecheck_expect_scalar_operand) | ||||||
| 2962 | << SrcType << SrcExpr.get()->getSourceRange(); | ||||||
| 2963 | SrcExpr = ExprError(); | ||||||
| 2964 | return; | ||||||
| 2965 | } | ||||||
| 2966 | |||||||
| 2967 | if (DestType->isExtVectorType()) { | ||||||
| 2968 | SrcExpr = Self.CheckExtVectorCast(OpRange, DestType, SrcExpr.get(), Kind); | ||||||
| 2969 | return; | ||||||
| 2970 | } | ||||||
| 2971 | |||||||
| 2972 | if (DestType->getAs<MatrixType>() || SrcType->getAs<MatrixType>()) { | ||||||
| 2973 | if (Self.CheckMatrixCast(OpRange, DestType, SrcType, Kind)) | ||||||
| 2974 | SrcExpr = ExprError(); | ||||||
| 2975 | return; | ||||||
| 2976 | } | ||||||
| 2977 | |||||||
| 2978 | if (const VectorType *DestVecTy = DestType->getAs<VectorType>()) { | ||||||
| 2979 | if (Self.ShouldSplatAltivecScalarInCast(DestVecTy) && | ||||||
| 2980 | (SrcType->isIntegerType() || SrcType->isFloatingType())) { | ||||||
| 2981 | Kind = CK_VectorSplat; | ||||||
| 2982 | SrcExpr = Self.prepareVectorSplat(DestType, SrcExpr.get()); | ||||||
| 2983 | } else if (Self.CheckVectorCast(OpRange, DestType, SrcType, Kind)) { | ||||||
| 2984 | SrcExpr = ExprError(); | ||||||
| 2985 | } | ||||||
| 2986 | return; | ||||||
| 2987 | } | ||||||
| 2988 | |||||||
| 2989 | if (SrcType->isVectorType()) { | ||||||
| 2990 | if (Self.CheckVectorCast(OpRange, SrcType, DestType, Kind)) | ||||||
| 2991 | SrcExpr = ExprError(); | ||||||
| 2992 | return; | ||||||
| 2993 | } | ||||||
| 2994 | |||||||
| 2995 | // The source and target types are both scalars, i.e. | ||||||
| 2996 | // - arithmetic types (fundamental, enum, and complex) | ||||||
| 2997 | // - all kinds of pointers | ||||||
| 2998 | // Note that member pointers were filtered out with C++, above. | ||||||
| 2999 | |||||||
| 3000 | if (isa<ObjCSelectorExpr>(SrcExpr.get())) { | ||||||
| 3001 | Self.Diag(SrcExpr.get()->getExprLoc(), diag::err_cast_selector_expr); | ||||||
| 3002 | SrcExpr = ExprError(); | ||||||
| 3003 | return; | ||||||
| 3004 | } | ||||||
| 3005 | |||||||
| 3006 | // Can't cast to or from bfloat | ||||||
| 3007 | if (DestType->isBFloat16Type() && !SrcType->isBFloat16Type()) { | ||||||
| 3008 | Self.Diag(SrcExpr.get()->getExprLoc(), diag::err_cast_to_bfloat16) | ||||||
| 3009 | << SrcExpr.get()->getSourceRange(); | ||||||
| 3010 | SrcExpr = ExprError(); | ||||||
| 3011 | return; | ||||||
| 3012 | } | ||||||
| 3013 | if (SrcType->isBFloat16Type() && !DestType->isBFloat16Type()) { | ||||||
| 3014 | Self.Diag(SrcExpr.get()->getExprLoc(), diag::err_cast_from_bfloat16) | ||||||
| 3015 | << SrcExpr.get()->getSourceRange(); | ||||||
| 3016 | SrcExpr = ExprError(); | ||||||
| 3017 | return; | ||||||
| 3018 | } | ||||||
| 3019 | |||||||
| 3020 | // If either type is a pointer, the other type has to be either an | ||||||
| 3021 | // integer or a pointer. | ||||||
| 3022 | if (!DestType->isArithmeticType()) { | ||||||
| 3023 | if (!SrcType->isIntegralType(Self.Context) && SrcType->isArithmeticType()) { | ||||||
| 3024 | Self.Diag(SrcExpr.get()->getExprLoc(), | ||||||
| 3025 | diag::err_cast_pointer_from_non_pointer_int) | ||||||
| 3026 | << SrcType << SrcExpr.get()->getSourceRange(); | ||||||
| 3027 | SrcExpr = ExprError(); | ||||||
| 3028 | return; | ||||||
| 3029 | } | ||||||
| 3030 | checkIntToPointerCast(/* CStyle */ true, OpRange, SrcExpr.get(), DestType, | ||||||
| 3031 | Self); | ||||||
| 3032 | } else if (!SrcType->isArithmeticType()) { | ||||||
| 3033 | if (!DestType->isIntegralType(Self.Context) && | ||||||
| 3034 | DestType->isArithmeticType()) { | ||||||
| 3035 | Self.Diag(SrcExpr.get()->getBeginLoc(), | ||||||
| 3036 | diag::err_cast_pointer_to_non_pointer_int) | ||||||
| 3037 | << DestType << SrcExpr.get()->getSourceRange(); | ||||||
| 3038 | SrcExpr = ExprError(); | ||||||
| 3039 | return; | ||||||
| 3040 | } | ||||||
| 3041 | |||||||
| 3042 | if ((Self.Context.getTypeSize(SrcType) > | ||||||
| 3043 | Self.Context.getTypeSize(DestType)) && | ||||||
| 3044 | !DestType->isBooleanType()) { | ||||||
| 3045 | // C 6.3.2.3p6: Any pointer type may be converted to an integer type. | ||||||
| 3046 | // Except as previously specified, the result is implementation-defined. | ||||||
| 3047 | // If the result cannot be represented in the integer type, the behavior | ||||||
| 3048 | // is undefined. The result need not be in the range of values of any | ||||||
| 3049 | // integer type. | ||||||
| 3050 | unsigned Diag; | ||||||
| 3051 | if (SrcType->isVoidPointerType()) | ||||||
| 3052 | Diag = DestType->isEnumeralType() ? diag::warn_void_pointer_to_enum_cast | ||||||
| 3053 | : diag::warn_void_pointer_to_int_cast; | ||||||
| 3054 | else if (DestType->isEnumeralType()) | ||||||
| 3055 | Diag = diag::warn_pointer_to_enum_cast; | ||||||
| 3056 | else | ||||||
| 3057 | Diag = diag::warn_pointer_to_int_cast; | ||||||
| 3058 | Self.Diag(OpRange.getBegin(), Diag) << SrcType << DestType << OpRange; | ||||||
| 3059 | } | ||||||
| 3060 | } | ||||||
| 3061 | |||||||
| 3062 | if (Self.getLangOpts().OpenCL && !Self.getOpenCLOptions().isAvailableOption( | ||||||
| 3063 | "cl_khr_fp16", Self.getLangOpts())) { | ||||||
| 3064 | if (DestType->isHalfType()) { | ||||||
| 3065 | Self.Diag(SrcExpr.get()->getBeginLoc(), diag::err_opencl_cast_to_half) | ||||||
| 3066 | << DestType << SrcExpr.get()->getSourceRange(); | ||||||
| 3067 | SrcExpr = ExprError(); | ||||||
| 3068 | return; | ||||||
| 3069 | } | ||||||
| 3070 | } | ||||||
| 3071 | |||||||
| 3072 | // ARC imposes extra restrictions on casts. | ||||||
| 3073 | if (Self.getLangOpts().allowsNonTrivialObjCLifetimeQualifiers()) { | ||||||
| 3074 | checkObjCConversion(Sema::CCK_CStyleCast); | ||||||
| 3075 | if (SrcExpr.isInvalid()) | ||||||
| 3076 | return; | ||||||
| 3077 | |||||||
| 3078 | const PointerType *CastPtr = DestType->getAs<PointerType>(); | ||||||
| 3079 | if (Self.getLangOpts().ObjCAutoRefCount && CastPtr) { | ||||||
| 3080 | if (const PointerType *ExprPtr = SrcType->getAs<PointerType>()) { | ||||||
| 3081 | Qualifiers CastQuals = CastPtr->getPointeeType().getQualifiers(); | ||||||
| 3082 | Qualifiers ExprQuals = ExprPtr->getPointeeType().getQualifiers(); | ||||||
| 3083 | if (CastPtr->getPointeeType()->isObjCLifetimeType() && | ||||||
| 3084 | ExprPtr->getPointeeType()->isObjCLifetimeType() && | ||||||
| 3085 | !CastQuals.compatiblyIncludesObjCLifetime(ExprQuals)) { | ||||||
| 3086 | Self.Diag(SrcExpr.get()->getBeginLoc(), | ||||||
| 3087 | diag::err_typecheck_incompatible_ownership) | ||||||
| 3088 | << SrcType << DestType << Sema::AA_Casting | ||||||
| 3089 | << SrcExpr.get()->getSourceRange(); | ||||||
| 3090 | return; | ||||||
| 3091 | } | ||||||
| 3092 | } | ||||||
| 3093 | } | ||||||
| 3094 | else if (!Self.CheckObjCARCUnavailableWeakConversion(DestType, SrcType)) { | ||||||
| 3095 | Self.Diag(SrcExpr.get()->getBeginLoc(), | ||||||
| 3096 | diag::err_arc_convesion_of_weak_unavailable) | ||||||
| 3097 | << 1 << SrcType << DestType << SrcExpr.get()->getSourceRange(); | ||||||
| 3098 | SrcExpr = ExprError(); | ||||||
| 3099 | return; | ||||||
| 3100 | } | ||||||
| 3101 | } | ||||||
| 3102 | |||||||
| 3103 | if (!checkCastFunctionType(Self, SrcExpr, DestType)) | ||||||
| 3104 | Self.Diag(OpRange.getBegin(), diag::warn_cast_function_type) | ||||||
| 3105 | << SrcType << DestType << OpRange; | ||||||
| 3106 | |||||||
| 3107 | DiagnoseCastOfObjCSEL(Self, SrcExpr, DestType); | ||||||
| 3108 | DiagnoseCallingConvCast(Self, SrcExpr, DestType, OpRange); | ||||||
| 3109 | DiagnoseBadFunctionCast(Self, SrcExpr, DestType); | ||||||
| 3110 | Kind = Self.PrepareScalarCast(SrcExpr, DestType); | ||||||
| 3111 | if (SrcExpr.isInvalid()) | ||||||
| 3112 | return; | ||||||
| 3113 | |||||||
| 3114 | if (Kind == CK_BitCast) | ||||||
| 3115 | checkCastAlign(); | ||||||
| 3116 | } | ||||||
| 3117 | |||||||
| 3118 | void CastOperation::CheckBuiltinBitCast() { | ||||||
| 3119 | QualType SrcType = SrcExpr.get()->getType(); | ||||||
| 3120 | |||||||
| 3121 | if (Self.RequireCompleteType(OpRange.getBegin(), DestType, | ||||||
| 3122 | diag::err_typecheck_cast_to_incomplete) || | ||||||
| 3123 | Self.RequireCompleteType(OpRange.getBegin(), SrcType, | ||||||
| 3124 | diag::err_incomplete_type)) { | ||||||
| 3125 | SrcExpr = ExprError(); | ||||||
| 3126 | return; | ||||||
| 3127 | } | ||||||
| 3128 | |||||||
| 3129 | if (SrcExpr.get()->isPRValue()) | ||||||
| 3130 | SrcExpr = Self.CreateMaterializeTemporaryExpr(SrcType, SrcExpr.get(), | ||||||
| 3131 | /*IsLValueReference=*/false); | ||||||
| 3132 | |||||||
| 3133 | CharUnits DestSize = Self.Context.getTypeSizeInChars(DestType); | ||||||
| 3134 | CharUnits SourceSize = Self.Context.getTypeSizeInChars(SrcType); | ||||||
| 3135 | if (DestSize != SourceSize) { | ||||||
| 3136 | Self.Diag(OpRange.getBegin(), diag::err_bit_cast_type_size_mismatch) | ||||||
| 3137 | << (int)SourceSize.getQuantity() << (int)DestSize.getQuantity(); | ||||||
| 3138 | SrcExpr = ExprError(); | ||||||
| 3139 | return; | ||||||
| 3140 | } | ||||||
| 3141 | |||||||
| 3142 | if (!DestType.isTriviallyCopyableType(Self.Context)) { | ||||||
| 3143 | Self.Diag(OpRange.getBegin(), diag::err_bit_cast_non_trivially_copyable) | ||||||
| 3144 | << 1; | ||||||
| 3145 | SrcExpr = ExprError(); | ||||||
| 3146 | return; | ||||||
| 3147 | } | ||||||
| 3148 | |||||||
| 3149 | if (!SrcType.isTriviallyCopyableType(Self.Context)) { | ||||||
| 3150 | Self.Diag(OpRange.getBegin(), diag::err_bit_cast_non_trivially_copyable) | ||||||
| 3151 | << 0; | ||||||
| 3152 | SrcExpr = ExprError(); | ||||||
| 3153 | return; | ||||||
| 3154 | } | ||||||
| 3155 | |||||||
| 3156 | Kind = CK_LValueToRValueBitCast; | ||||||
| 3157 | } | ||||||
| 3158 | |||||||
| 3159 | /// DiagnoseCastQual - Warn whenever casts discards a qualifiers, be it either | ||||||
| 3160 | /// const, volatile or both. | ||||||
| 3161 | static void DiagnoseCastQual(Sema &Self, const ExprResult &SrcExpr, | ||||||
| 3162 | QualType DestType) { | ||||||
| 3163 | if (SrcExpr.isInvalid()) | ||||||
| 3164 | return; | ||||||
| 3165 | |||||||
| 3166 | QualType SrcType = SrcExpr.get()->getType(); | ||||||
| 3167 | if (!((SrcType->isAnyPointerType() && DestType->isAnyPointerType()) || | ||||||
| 3168 | DestType->isLValueReferenceType())) | ||||||
| 3169 | return; | ||||||
| 3170 | |||||||
| 3171 | QualType TheOffendingSrcType, TheOffendingDestType; | ||||||
| 3172 | Qualifiers CastAwayQualifiers; | ||||||
| 3173 | if (CastsAwayConstness(Self, SrcType, DestType, true, false, | ||||||
| 3174 | &TheOffendingSrcType, &TheOffendingDestType, | ||||||
| 3175 | &CastAwayQualifiers) != | ||||||
| 3176 | CastAwayConstnessKind::CACK_Similar) | ||||||
| 3177 | return; | ||||||
| 3178 | |||||||
| 3179 | // FIXME: 'restrict' is not properly handled here. | ||||||
| 3180 | int qualifiers = -1; | ||||||
| 3181 | if (CastAwayQualifiers.hasConst() && CastAwayQualifiers.hasVolatile()) { | ||||||
| 3182 | qualifiers = 0; | ||||||
| 3183 | } else if (CastAwayQualifiers.hasConst()) { | ||||||
| 3184 | qualifiers = 1; | ||||||
| 3185 | } else if (CastAwayQualifiers.hasVolatile()) { | ||||||
| 3186 | qualifiers = 2; | ||||||
| 3187 | } | ||||||
| 3188 | // This is a variant of int **x; const int **y = (const int **)x; | ||||||
| 3189 | if (qualifiers == -1) | ||||||
| 3190 | Self.Diag(SrcExpr.get()->getBeginLoc(), diag::warn_cast_qual2) | ||||||
| 3191 | << SrcType << DestType; | ||||||
| 3192 | else | ||||||
| 3193 | Self.Diag(SrcExpr.get()->getBeginLoc(), diag::warn_cast_qual) | ||||||
| 3194 | << TheOffendingSrcType << TheOffendingDestType << qualifiers; | ||||||
| 3195 | } | ||||||
| 3196 | |||||||
| 3197 | ExprResult Sema::BuildCStyleCastExpr(SourceLocation LPLoc, | ||||||
| 3198 | TypeSourceInfo *CastTypeInfo, | ||||||
| 3199 | SourceLocation RPLoc, | ||||||
| 3200 | Expr *CastExpr) { | ||||||
| 3201 | CastOperation Op(*this, CastTypeInfo->getType(), CastExpr); | ||||||
| 3202 | Op.DestRange = CastTypeInfo->getTypeLoc().getSourceRange(); | ||||||
| 3203 | Op.OpRange = SourceRange(LPLoc, CastExpr->getEndLoc()); | ||||||
| 3204 | |||||||
| 3205 | if (getLangOpts().CPlusPlus) { | ||||||
| 3206 | Op.CheckCXXCStyleCast(/*FunctionalCast=*/ false, | ||||||
| 3207 | isa<InitListExpr>(CastExpr)); | ||||||
| 3208 | } else { | ||||||
| 3209 | Op.CheckCStyleCast(); | ||||||
| 3210 | } | ||||||
| 3211 | |||||||
| 3212 | if (Op.SrcExpr.isInvalid()) | ||||||
| 3213 | return ExprError(); | ||||||
| 3214 | |||||||
| 3215 | // -Wcast-qual | ||||||
| 3216 | DiagnoseCastQual(Op.Self, Op.SrcExpr, Op.DestType); | ||||||
| 3217 | |||||||
| 3218 | return Op.complete(CStyleCastExpr::Create( | ||||||
| 3219 | Context, Op.ResultType, Op.ValueKind, Op.Kind, Op.SrcExpr.get(), | ||||||
| 3220 | &Op.BasePath, CurFPFeatureOverrides(), CastTypeInfo, LPLoc, RPLoc)); | ||||||
| 3221 | } | ||||||
| 3222 | |||||||
| 3223 | ExprResult Sema::BuildCXXFunctionalCastExpr(TypeSourceInfo *CastTypeInfo, | ||||||
| 3224 | QualType Type, | ||||||
| 3225 | SourceLocation LPLoc, | ||||||
| 3226 | Expr *CastExpr, | ||||||
| 3227 | SourceLocation RPLoc) { | ||||||
| 3228 | assert(LPLoc.isValid() && "List-initialization shouldn't get here.")(static_cast <bool> (LPLoc.isValid() && "List-initialization shouldn't get here." ) ? void (0) : __assert_fail ("LPLoc.isValid() && \"List-initialization shouldn't get here.\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/lib/Sema/SemaCast.cpp" , 3228, __extension__ __PRETTY_FUNCTION__)); | ||||||
| 3229 | CastOperation Op(*this, Type, CastExpr); | ||||||
| 3230 | Op.DestRange = CastTypeInfo->getTypeLoc().getSourceRange(); | ||||||
| 3231 | Op.OpRange = SourceRange(Op.DestRange.getBegin(), CastExpr->getEndLoc()); | ||||||
| 3232 | |||||||
| 3233 | Op.CheckCXXCStyleCast(/*FunctionalCast=*/true, /*ListInit=*/false); | ||||||
| 3234 | if (Op.SrcExpr.isInvalid()) | ||||||
| 3235 | return ExprError(); | ||||||
| 3236 | |||||||
| 3237 | auto *SubExpr = Op.SrcExpr.get(); | ||||||
| 3238 | if (auto *BindExpr = dyn_cast<CXXBindTemporaryExpr>(SubExpr)) | ||||||
| 3239 | SubExpr = BindExpr->getSubExpr(); | ||||||
| 3240 | if (auto *ConstructExpr = dyn_cast<CXXConstructExpr>(SubExpr)) | ||||||
| 3241 | ConstructExpr->setParenOrBraceRange(SourceRange(LPLoc, RPLoc)); | ||||||
| 3242 | |||||||
| 3243 | return Op.complete(CXXFunctionalCastExpr::Create( | ||||||
| 3244 | Context, Op.ResultType, Op.ValueKind, CastTypeInfo, Op.Kind, | ||||||
| 3245 | Op.SrcExpr.get(), &Op.BasePath, CurFPFeatureOverrides(), LPLoc, RPLoc)); | ||||||
| 3246 | } |
| 1 | //===- Type.h - C Language Family Type Representation -----------*- C++ -*-===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
| 9 | /// \file |
| 10 | /// C Language Family Type Representation |
| 11 | /// |
| 12 | /// This file defines the clang::Type interface and subclasses, used to |
| 13 | /// represent types for languages in the C family. |
| 14 | // |
| 15 | //===----------------------------------------------------------------------===// |
| 16 | |
| 17 | #ifndef LLVM_CLANG_AST_TYPE_H |
| 18 | #define LLVM_CLANG_AST_TYPE_H |
| 19 | |
| 20 | #include "clang/AST/DependenceFlags.h" |
| 21 | #include "clang/AST/NestedNameSpecifier.h" |
| 22 | #include "clang/AST/TemplateName.h" |
| 23 | #include "clang/Basic/AddressSpaces.h" |
| 24 | #include "clang/Basic/AttrKinds.h" |
| 25 | #include "clang/Basic/Diagnostic.h" |
| 26 | #include "clang/Basic/ExceptionSpecificationType.h" |
| 27 | #include "clang/Basic/LLVM.h" |
| 28 | #include "clang/Basic/Linkage.h" |
| 29 | #include "clang/Basic/PartialDiagnostic.h" |
| 30 | #include "clang/Basic/SourceLocation.h" |
| 31 | #include "clang/Basic/Specifiers.h" |
| 32 | #include "clang/Basic/Visibility.h" |
| 33 | #include "llvm/ADT/APInt.h" |
| 34 | #include "llvm/ADT/APSInt.h" |
| 35 | #include "llvm/ADT/ArrayRef.h" |
| 36 | #include "llvm/ADT/FoldingSet.h" |
| 37 | #include "llvm/ADT/None.h" |
| 38 | #include "llvm/ADT/Optional.h" |
| 39 | #include "llvm/ADT/PointerIntPair.h" |
| 40 | #include "llvm/ADT/PointerUnion.h" |
| 41 | #include "llvm/ADT/StringRef.h" |
| 42 | #include "llvm/ADT/Twine.h" |
| 43 | #include "llvm/ADT/iterator_range.h" |
| 44 | #include "llvm/Support/Casting.h" |
| 45 | #include "llvm/Support/Compiler.h" |
| 46 | #include "llvm/Support/ErrorHandling.h" |
| 47 | #include "llvm/Support/PointerLikeTypeTraits.h" |
| 48 | #include "llvm/Support/TrailingObjects.h" |
| 49 | #include "llvm/Support/type_traits.h" |
| 50 | #include <cassert> |
| 51 | #include <cstddef> |
| 52 | #include <cstdint> |
| 53 | #include <cstring> |
| 54 | #include <string> |
| 55 | #include <type_traits> |
| 56 | #include <utility> |
| 57 | |
| 58 | namespace clang { |
| 59 | |
| 60 | class ExtQuals; |
| 61 | class QualType; |
| 62 | class ConceptDecl; |
| 63 | class TagDecl; |
| 64 | class TemplateParameterList; |
| 65 | class Type; |
| 66 | |
| 67 | enum { |
| 68 | TypeAlignmentInBits = 4, |
| 69 | TypeAlignment = 1 << TypeAlignmentInBits |
| 70 | }; |
| 71 | |
| 72 | namespace serialization { |
| 73 | template <class T> class AbstractTypeReader; |
| 74 | template <class T> class AbstractTypeWriter; |
| 75 | } |
| 76 | |
| 77 | } // namespace clang |
| 78 | |
| 79 | namespace llvm { |
| 80 | |
| 81 | template <typename T> |
| 82 | struct PointerLikeTypeTraits; |
| 83 | template<> |
| 84 | struct PointerLikeTypeTraits< ::clang::Type*> { |
| 85 | static inline void *getAsVoidPointer(::clang::Type *P) { return P; } |
| 86 | |
| 87 | static inline ::clang::Type *getFromVoidPointer(void *P) { |
| 88 | return static_cast< ::clang::Type*>(P); |
| 89 | } |
| 90 | |
| 91 | static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits; |
| 92 | }; |
| 93 | |
| 94 | template<> |
| 95 | struct PointerLikeTypeTraits< ::clang::ExtQuals*> { |
| 96 | static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } |
| 97 | |
| 98 | static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { |
| 99 | return static_cast< ::clang::ExtQuals*>(P); |
| 100 | } |
| 101 | |
| 102 | static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits; |
| 103 | }; |
| 104 | |
| 105 | } // namespace llvm |
| 106 | |
| 107 | namespace clang { |
| 108 | |
| 109 | class ASTContext; |
| 110 | template <typename> class CanQual; |
| 111 | class CXXRecordDecl; |
| 112 | class DeclContext; |
| 113 | class EnumDecl; |
| 114 | class Expr; |
| 115 | class ExtQualsTypeCommonBase; |
| 116 | class FunctionDecl; |
| 117 | class IdentifierInfo; |
| 118 | class NamedDecl; |
| 119 | class ObjCInterfaceDecl; |
| 120 | class ObjCProtocolDecl; |
| 121 | class ObjCTypeParamDecl; |
| 122 | struct PrintingPolicy; |
| 123 | class RecordDecl; |
| 124 | class Stmt; |
| 125 | class TagDecl; |
| 126 | class TemplateArgument; |
| 127 | class TemplateArgumentListInfo; |
| 128 | class TemplateArgumentLoc; |
| 129 | class TemplateTypeParmDecl; |
| 130 | class TypedefNameDecl; |
| 131 | class UnresolvedUsingTypenameDecl; |
| 132 | |
| 133 | using CanQualType = CanQual<Type>; |
| 134 | |
| 135 | // Provide forward declarations for all of the *Type classes. |
| 136 | #define TYPE(Class, Base) class Class##Type; |
| 137 | #include "clang/AST/TypeNodes.inc" |
| 138 | |
| 139 | /// The collection of all-type qualifiers we support. |
| 140 | /// Clang supports five independent qualifiers: |
| 141 | /// * C99: const, volatile, and restrict |
| 142 | /// * MS: __unaligned |
| 143 | /// * Embedded C (TR18037): address spaces |
| 144 | /// * Objective C: the GC attributes (none, weak, or strong) |
| 145 | class Qualifiers { |
| 146 | public: |
| 147 | enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. |
| 148 | Const = 0x1, |
| 149 | Restrict = 0x2, |
| 150 | Volatile = 0x4, |
| 151 | CVRMask = Const | Volatile | Restrict |
| 152 | }; |
| 153 | |
| 154 | enum GC { |
| 155 | GCNone = 0, |
| 156 | Weak, |
| 157 | Strong |
| 158 | }; |
| 159 | |
| 160 | enum ObjCLifetime { |
| 161 | /// There is no lifetime qualification on this type. |
| 162 | OCL_None, |
| 163 | |
| 164 | /// This object can be modified without requiring retains or |
| 165 | /// releases. |
| 166 | OCL_ExplicitNone, |
| 167 | |
| 168 | /// Assigning into this object requires the old value to be |
| 169 | /// released and the new value to be retained. The timing of the |
| 170 | /// release of the old value is inexact: it may be moved to |
| 171 | /// immediately after the last known point where the value is |
| 172 | /// live. |
| 173 | OCL_Strong, |
| 174 | |
| 175 | /// Reading or writing from this object requires a barrier call. |
| 176 | OCL_Weak, |
| 177 | |
| 178 | /// Assigning into this object requires a lifetime extension. |
| 179 | OCL_Autoreleasing |
| 180 | }; |
| 181 | |
| 182 | enum { |
| 183 | /// The maximum supported address space number. |
| 184 | /// 23 bits should be enough for anyone. |
| 185 | MaxAddressSpace = 0x7fffffu, |
| 186 | |
| 187 | /// The width of the "fast" qualifier mask. |
| 188 | FastWidth = 3, |
| 189 | |
| 190 | /// The fast qualifier mask. |
| 191 | FastMask = (1 << FastWidth) - 1 |
| 192 | }; |
| 193 | |
| 194 | /// Returns the common set of qualifiers while removing them from |
| 195 | /// the given sets. |
| 196 | static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { |
| 197 | // If both are only CVR-qualified, bit operations are sufficient. |
| 198 | if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { |
| 199 | Qualifiers Q; |
| 200 | Q.Mask = L.Mask & R.Mask; |
| 201 | L.Mask &= ~Q.Mask; |
| 202 | R.Mask &= ~Q.Mask; |
| 203 | return Q; |
| 204 | } |
| 205 | |
| 206 | Qualifiers Q; |
| 207 | unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); |
| 208 | Q.addCVRQualifiers(CommonCRV); |
| 209 | L.removeCVRQualifiers(CommonCRV); |
| 210 | R.removeCVRQualifiers(CommonCRV); |
| 211 | |
| 212 | if (L.getObjCGCAttr() == R.getObjCGCAttr()) { |
| 213 | Q.setObjCGCAttr(L.getObjCGCAttr()); |
| 214 | L.removeObjCGCAttr(); |
| 215 | R.removeObjCGCAttr(); |
| 216 | } |
| 217 | |
| 218 | if (L.getObjCLifetime() == R.getObjCLifetime()) { |
| 219 | Q.setObjCLifetime(L.getObjCLifetime()); |
| 220 | L.removeObjCLifetime(); |
| 221 | R.removeObjCLifetime(); |
| 222 | } |
| 223 | |
| 224 | if (L.getAddressSpace() == R.getAddressSpace()) { |
| 225 | Q.setAddressSpace(L.getAddressSpace()); |
| 226 | L.removeAddressSpace(); |
| 227 | R.removeAddressSpace(); |
| 228 | } |
| 229 | return Q; |
| 230 | } |
| 231 | |
| 232 | static Qualifiers fromFastMask(unsigned Mask) { |
| 233 | Qualifiers Qs; |
| 234 | Qs.addFastQualifiers(Mask); |
| 235 | return Qs; |
| 236 | } |
| 237 | |
| 238 | static Qualifiers fromCVRMask(unsigned CVR) { |
| 239 | Qualifiers Qs; |
| 240 | Qs.addCVRQualifiers(CVR); |
| 241 | return Qs; |
| 242 | } |
| 243 | |
| 244 | static Qualifiers fromCVRUMask(unsigned CVRU) { |
| 245 | Qualifiers Qs; |
| 246 | Qs.addCVRUQualifiers(CVRU); |
| 247 | return Qs; |
| 248 | } |
| 249 | |
| 250 | // Deserialize qualifiers from an opaque representation. |
| 251 | static Qualifiers fromOpaqueValue(unsigned opaque) { |
| 252 | Qualifiers Qs; |
| 253 | Qs.Mask = opaque; |
| 254 | return Qs; |
| 255 | } |
| 256 | |
| 257 | // Serialize these qualifiers into an opaque representation. |
| 258 | unsigned getAsOpaqueValue() const { |
| 259 | return Mask; |
| 260 | } |
| 261 | |
| 262 | bool hasConst() const { return Mask & Const; } |
| 263 | bool hasOnlyConst() const { return Mask == Const; } |
| 264 | void removeConst() { Mask &= ~Const; } |
| 265 | void addConst() { Mask |= Const; } |
| 266 | |
| 267 | bool hasVolatile() const { return Mask & Volatile; } |
| 268 | bool hasOnlyVolatile() const { return Mask == Volatile; } |
| 269 | void removeVolatile() { Mask &= ~Volatile; } |
| 270 | void addVolatile() { Mask |= Volatile; } |
| 271 | |
| 272 | bool hasRestrict() const { return Mask & Restrict; } |
| 273 | bool hasOnlyRestrict() const { return Mask == Restrict; } |
| 274 | void removeRestrict() { Mask &= ~Restrict; } |
| 275 | void addRestrict() { Mask |= Restrict; } |
| 276 | |
| 277 | bool hasCVRQualifiers() const { return getCVRQualifiers(); } |
| 278 | unsigned getCVRQualifiers() const { return Mask & CVRMask; } |
| 279 | unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); } |
| 280 | |
| 281 | void setCVRQualifiers(unsigned mask) { |
| 282 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")(static_cast <bool> (!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? void (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 282, __extension__ __PRETTY_FUNCTION__)); |
| 283 | Mask = (Mask & ~CVRMask) | mask; |
| 284 | } |
| 285 | void removeCVRQualifiers(unsigned mask) { |
| 286 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")(static_cast <bool> (!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? void (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 286, __extension__ __PRETTY_FUNCTION__)); |
| 287 | Mask &= ~mask; |
| 288 | } |
| 289 | void removeCVRQualifiers() { |
| 290 | removeCVRQualifiers(CVRMask); |
| 291 | } |
| 292 | void addCVRQualifiers(unsigned mask) { |
| 293 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")(static_cast <bool> (!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? void (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 293, __extension__ __PRETTY_FUNCTION__)); |
| 294 | Mask |= mask; |
| 295 | } |
| 296 | void addCVRUQualifiers(unsigned mask) { |
| 297 | assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")(static_cast <bool> (!(mask & ~CVRMask & ~UMask ) && "bitmask contains non-CVRU bits") ? void (0) : __assert_fail ("!(mask & ~CVRMask & ~UMask) && \"bitmask contains non-CVRU bits\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 297, __extension__ __PRETTY_FUNCTION__)); |
| 298 | Mask |= mask; |
| 299 | } |
| 300 | |
| 301 | bool hasUnaligned() const { return Mask & UMask; } |
| 302 | void setUnaligned(bool flag) { |
| 303 | Mask = (Mask & ~UMask) | (flag ? UMask : 0); |
| 304 | } |
| 305 | void removeUnaligned() { Mask &= ~UMask; } |
| 306 | void addUnaligned() { Mask |= UMask; } |
| 307 | |
| 308 | bool hasObjCGCAttr() const { return Mask & GCAttrMask; } |
| 309 | GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } |
| 310 | void setObjCGCAttr(GC type) { |
| 311 | Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); |
| 312 | } |
| 313 | void removeObjCGCAttr() { setObjCGCAttr(GCNone); } |
| 314 | void addObjCGCAttr(GC type) { |
| 315 | assert(type)(static_cast <bool> (type) ? void (0) : __assert_fail ( "type", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 315, __extension__ __PRETTY_FUNCTION__)); |
| 316 | setObjCGCAttr(type); |
| 317 | } |
| 318 | Qualifiers withoutObjCGCAttr() const { |
| 319 | Qualifiers qs = *this; |
| 320 | qs.removeObjCGCAttr(); |
| 321 | return qs; |
| 322 | } |
| 323 | Qualifiers withoutObjCLifetime() const { |
| 324 | Qualifiers qs = *this; |
| 325 | qs.removeObjCLifetime(); |
| 326 | return qs; |
| 327 | } |
| 328 | Qualifiers withoutAddressSpace() const { |
| 329 | Qualifiers qs = *this; |
| 330 | qs.removeAddressSpace(); |
| 331 | return qs; |
| 332 | } |
| 333 | |
| 334 | bool hasObjCLifetime() const { return Mask & LifetimeMask; } |
| 335 | ObjCLifetime getObjCLifetime() const { |
| 336 | return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); |
| 337 | } |
| 338 | void setObjCLifetime(ObjCLifetime type) { |
| 339 | Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); |
| 340 | } |
| 341 | void removeObjCLifetime() { setObjCLifetime(OCL_None); } |
| 342 | void addObjCLifetime(ObjCLifetime type) { |
| 343 | assert(type)(static_cast <bool> (type) ? void (0) : __assert_fail ( "type", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 343, __extension__ __PRETTY_FUNCTION__)); |
| 344 | assert(!hasObjCLifetime())(static_cast <bool> (!hasObjCLifetime()) ? void (0) : __assert_fail ("!hasObjCLifetime()", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 344, __extension__ __PRETTY_FUNCTION__)); |
| 345 | Mask |= (type << LifetimeShift); |
| 346 | } |
| 347 | |
| 348 | /// True if the lifetime is neither None or ExplicitNone. |
| 349 | bool hasNonTrivialObjCLifetime() const { |
| 350 | ObjCLifetime lifetime = getObjCLifetime(); |
| 351 | return (lifetime > OCL_ExplicitNone); |
| 352 | } |
| 353 | |
| 354 | /// True if the lifetime is either strong or weak. |
| 355 | bool hasStrongOrWeakObjCLifetime() const { |
| 356 | ObjCLifetime lifetime = getObjCLifetime(); |
| 357 | return (lifetime == OCL_Strong || lifetime == OCL_Weak); |
| 358 | } |
| 359 | |
| 360 | bool hasAddressSpace() const { return Mask & AddressSpaceMask; } |
| 361 | LangAS getAddressSpace() const { |
| 362 | return static_cast<LangAS>(Mask >> AddressSpaceShift); |
| 363 | } |
| 364 | bool hasTargetSpecificAddressSpace() const { |
| 365 | return isTargetAddressSpace(getAddressSpace()); |
| 366 | } |
| 367 | /// Get the address space attribute value to be printed by diagnostics. |
| 368 | unsigned getAddressSpaceAttributePrintValue() const { |
| 369 | auto Addr = getAddressSpace(); |
| 370 | // This function is not supposed to be used with language specific |
| 371 | // address spaces. If that happens, the diagnostic message should consider |
| 372 | // printing the QualType instead of the address space value. |
| 373 | assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace())(static_cast <bool> (Addr == LangAS::Default || hasTargetSpecificAddressSpace ()) ? void (0) : __assert_fail ("Addr == LangAS::Default || hasTargetSpecificAddressSpace()" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 373, __extension__ __PRETTY_FUNCTION__)); |
| 374 | if (Addr != LangAS::Default) |
| 375 | return toTargetAddressSpace(Addr); |
| 376 | // TODO: The diagnostic messages where Addr may be 0 should be fixed |
| 377 | // since it cannot differentiate the situation where 0 denotes the default |
| 378 | // address space or user specified __attribute__((address_space(0))). |
| 379 | return 0; |
| 380 | } |
| 381 | void setAddressSpace(LangAS space) { |
| 382 | assert((unsigned)space <= MaxAddressSpace)(static_cast <bool> ((unsigned)space <= MaxAddressSpace ) ? void (0) : __assert_fail ("(unsigned)space <= MaxAddressSpace" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 382, __extension__ __PRETTY_FUNCTION__)); |
| 383 | Mask = (Mask & ~AddressSpaceMask) |
| 384 | | (((uint32_t) space) << AddressSpaceShift); |
| 385 | } |
| 386 | void removeAddressSpace() { setAddressSpace(LangAS::Default); } |
| 387 | void addAddressSpace(LangAS space) { |
| 388 | assert(space != LangAS::Default)(static_cast <bool> (space != LangAS::Default) ? void ( 0) : __assert_fail ("space != LangAS::Default", "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 388, __extension__ __PRETTY_FUNCTION__)); |
| 389 | setAddressSpace(space); |
| 390 | } |
| 391 | |
| 392 | // Fast qualifiers are those that can be allocated directly |
| 393 | // on a QualType object. |
| 394 | bool hasFastQualifiers() const { return getFastQualifiers(); } |
| 395 | unsigned getFastQualifiers() const { return Mask & FastMask; } |
| 396 | void setFastQualifiers(unsigned mask) { |
| 397 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")(static_cast <bool> (!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits") ? void (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 397, __extension__ __PRETTY_FUNCTION__)); |
| 398 | Mask = (Mask & ~FastMask) | mask; |
| 399 | } |
| 400 | void removeFastQualifiers(unsigned mask) { |
| 401 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")(static_cast <bool> (!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits") ? void (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 401, __extension__ __PRETTY_FUNCTION__)); |
| 402 | Mask &= ~mask; |
| 403 | } |
| 404 | void removeFastQualifiers() { |
| 405 | removeFastQualifiers(FastMask); |
| 406 | } |
| 407 | void addFastQualifiers(unsigned mask) { |
| 408 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")(static_cast <bool> (!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits") ? void (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 408, __extension__ __PRETTY_FUNCTION__)); |
| 409 | Mask |= mask; |
| 410 | } |
| 411 | |
| 412 | /// Return true if the set contains any qualifiers which require an ExtQuals |
| 413 | /// node to be allocated. |
| 414 | bool hasNonFastQualifiers() const { return Mask & ~FastMask; } |
| 415 | Qualifiers getNonFastQualifiers() const { |
| 416 | Qualifiers Quals = *this; |
| 417 | Quals.setFastQualifiers(0); |
| 418 | return Quals; |
| 419 | } |
| 420 | |
| 421 | /// Return true if the set contains any qualifiers. |
| 422 | bool hasQualifiers() const { return Mask; } |
| 423 | bool empty() const { return !Mask; } |
| 424 | |
| 425 | /// Add the qualifiers from the given set to this set. |
| 426 | void addQualifiers(Qualifiers Q) { |
| 427 | // If the other set doesn't have any non-boolean qualifiers, just |
| 428 | // bit-or it in. |
| 429 | if (!(Q.Mask & ~CVRMask)) |
| 430 | Mask |= Q.Mask; |
| 431 | else { |
| 432 | Mask |= (Q.Mask & CVRMask); |
| 433 | if (Q.hasAddressSpace()) |
| 434 | addAddressSpace(Q.getAddressSpace()); |
| 435 | if (Q.hasObjCGCAttr()) |
| 436 | addObjCGCAttr(Q.getObjCGCAttr()); |
| 437 | if (Q.hasObjCLifetime()) |
| 438 | addObjCLifetime(Q.getObjCLifetime()); |
| 439 | } |
| 440 | } |
| 441 | |
| 442 | /// Remove the qualifiers from the given set from this set. |
| 443 | void removeQualifiers(Qualifiers Q) { |
| 444 | // If the other set doesn't have any non-boolean qualifiers, just |
| 445 | // bit-and the inverse in. |
| 446 | if (!(Q.Mask & ~CVRMask)) |
| 447 | Mask &= ~Q.Mask; |
| 448 | else { |
| 449 | Mask &= ~(Q.Mask & CVRMask); |
| 450 | if (getObjCGCAttr() == Q.getObjCGCAttr()) |
| 451 | removeObjCGCAttr(); |
| 452 | if (getObjCLifetime() == Q.getObjCLifetime()) |
| 453 | removeObjCLifetime(); |
| 454 | if (getAddressSpace() == Q.getAddressSpace()) |
| 455 | removeAddressSpace(); |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | /// Add the qualifiers from the given set to this set, given that |
| 460 | /// they don't conflict. |
| 461 | void addConsistentQualifiers(Qualifiers qs) { |
| 462 | assert(getAddressSpace() == qs.getAddressSpace() ||(static_cast <bool> (getAddressSpace() == qs.getAddressSpace () || !hasAddressSpace() || !qs.hasAddressSpace()) ? void (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 463, __extension__ __PRETTY_FUNCTION__)) |
| 463 | !hasAddressSpace() || !qs.hasAddressSpace())(static_cast <bool> (getAddressSpace() == qs.getAddressSpace () || !hasAddressSpace() || !qs.hasAddressSpace()) ? void (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 463, __extension__ __PRETTY_FUNCTION__)); |
| 464 | assert(getObjCGCAttr() == qs.getObjCGCAttr() ||(static_cast <bool> (getObjCGCAttr() == qs.getObjCGCAttr () || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? void (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 465, __extension__ __PRETTY_FUNCTION__)) |
| 465 | !hasObjCGCAttr() || !qs.hasObjCGCAttr())(static_cast <bool> (getObjCGCAttr() == qs.getObjCGCAttr () || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? void (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 465, __extension__ __PRETTY_FUNCTION__)); |
| 466 | assert(getObjCLifetime() == qs.getObjCLifetime() ||(static_cast <bool> (getObjCLifetime() == qs.getObjCLifetime () || !hasObjCLifetime() || !qs.hasObjCLifetime()) ? void (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 467, __extension__ __PRETTY_FUNCTION__)) |
| 467 | !hasObjCLifetime() || !qs.hasObjCLifetime())(static_cast <bool> (getObjCLifetime() == qs.getObjCLifetime () || !hasObjCLifetime() || !qs.hasObjCLifetime()) ? void (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 467, __extension__ __PRETTY_FUNCTION__)); |
| 468 | Mask |= qs.Mask; |
| 469 | } |
| 470 | |
| 471 | /// Returns true if address space A is equal to or a superset of B. |
| 472 | /// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of |
| 473 | /// overlapping address spaces. |
| 474 | /// CL1.1 or CL1.2: |
| 475 | /// every address space is a superset of itself. |
| 476 | /// CL2.0 adds: |
| 477 | /// __generic is a superset of any address space except for __constant. |
| 478 | static bool isAddressSpaceSupersetOf(LangAS A, LangAS B) { |
| 479 | // Address spaces must match exactly. |
| 480 | return A == B || |
| 481 | // Otherwise in OpenCLC v2.0 s6.5.5: every address space except |
| 482 | // for __constant can be used as __generic. |
| 483 | (A == LangAS::opencl_generic && B != LangAS::opencl_constant) || |
| 484 | // We also define global_device and global_host address spaces, |
| 485 | // to distinguish global pointers allocated on host from pointers |
| 486 | // allocated on device, which are a subset of __global. |
| 487 | (A == LangAS::opencl_global && (B == LangAS::opencl_global_device || |
| 488 | B == LangAS::opencl_global_host)) || |
| 489 | (A == LangAS::sycl_global && (B == LangAS::sycl_global_device || |
| 490 | B == LangAS::sycl_global_host)) || |
| 491 | // Consider pointer size address spaces to be equivalent to default. |
| 492 | ((isPtrSizeAddressSpace(A) || A == LangAS::Default) && |
| 493 | (isPtrSizeAddressSpace(B) || B == LangAS::Default)) || |
| 494 | // Default is a superset of SYCL address spaces. |
| 495 | (A == LangAS::Default && |
| 496 | (B == LangAS::sycl_private || B == LangAS::sycl_local || |
| 497 | B == LangAS::sycl_global || B == LangAS::sycl_global_device || |
| 498 | B == LangAS::sycl_global_host)); |
| 499 | } |
| 500 | |
| 501 | /// Returns true if the address space in these qualifiers is equal to or |
| 502 | /// a superset of the address space in the argument qualifiers. |
| 503 | bool isAddressSpaceSupersetOf(Qualifiers other) const { |
| 504 | return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace()); |
| 505 | } |
| 506 | |
| 507 | /// Determines if these qualifiers compatibly include another set. |
| 508 | /// Generally this answers the question of whether an object with the other |
| 509 | /// qualifiers can be safely used as an object with these qualifiers. |
| 510 | bool compatiblyIncludes(Qualifiers other) const { |
| 511 | return isAddressSpaceSupersetOf(other) && |
| 512 | // ObjC GC qualifiers can match, be added, or be removed, but can't |
| 513 | // be changed. |
| 514 | (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() || |
| 515 | !other.hasObjCGCAttr()) && |
| 516 | // ObjC lifetime qualifiers must match exactly. |
| 517 | getObjCLifetime() == other.getObjCLifetime() && |
| 518 | // CVR qualifiers may subset. |
| 519 | (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) && |
| 520 | // U qualifier may superset. |
| 521 | (!other.hasUnaligned() || hasUnaligned()); |
| 522 | } |
| 523 | |
| 524 | /// Determines if these qualifiers compatibly include another set of |
| 525 | /// qualifiers from the narrow perspective of Objective-C ARC lifetime. |
| 526 | /// |
| 527 | /// One set of Objective-C lifetime qualifiers compatibly includes the other |
| 528 | /// if the lifetime qualifiers match, or if both are non-__weak and the |
| 529 | /// including set also contains the 'const' qualifier, or both are non-__weak |
| 530 | /// and one is None (which can only happen in non-ARC modes). |
| 531 | bool compatiblyIncludesObjCLifetime(Qualifiers other) const { |
| 532 | if (getObjCLifetime() == other.getObjCLifetime()) |
| 533 | return true; |
| 534 | |
| 535 | if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) |
| 536 | return false; |
| 537 | |
| 538 | if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None) |
| 539 | return true; |
| 540 | |
| 541 | return hasConst(); |
| 542 | } |
| 543 | |
| 544 | /// Determine whether this set of qualifiers is a strict superset of |
| 545 | /// another set of qualifiers, not considering qualifier compatibility. |
| 546 | bool isStrictSupersetOf(Qualifiers Other) const; |
| 547 | |
| 548 | bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } |
| 549 | bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } |
| 550 | |
| 551 | explicit operator bool() const { return hasQualifiers(); } |
| 552 | |
| 553 | Qualifiers &operator+=(Qualifiers R) { |
| 554 | addQualifiers(R); |
| 555 | return *this; |
| 556 | } |
| 557 | |
| 558 | // Union two qualifier sets. If an enumerated qualifier appears |
| 559 | // in both sets, use the one from the right. |
| 560 | friend Qualifiers operator+(Qualifiers L, Qualifiers R) { |
| 561 | L += R; |
| 562 | return L; |
| 563 | } |
| 564 | |
| 565 | Qualifiers &operator-=(Qualifiers R) { |
| 566 | removeQualifiers(R); |
| 567 | return *this; |
| 568 | } |
| 569 | |
| 570 | /// Compute the difference between two qualifier sets. |
| 571 | friend Qualifiers operator-(Qualifiers L, Qualifiers R) { |
| 572 | L -= R; |
| 573 | return L; |
| 574 | } |
| 575 | |
| 576 | std::string getAsString() const; |
| 577 | std::string getAsString(const PrintingPolicy &Policy) const; |
| 578 | |
| 579 | static std::string getAddrSpaceAsString(LangAS AS); |
| 580 | |
| 581 | bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; |
| 582 | void print(raw_ostream &OS, const PrintingPolicy &Policy, |
| 583 | bool appendSpaceIfNonEmpty = false) const; |
| 584 | |
| 585 | void Profile(llvm::FoldingSetNodeID &ID) const { |
| 586 | ID.AddInteger(Mask); |
| 587 | } |
| 588 | |
| 589 | private: |
| 590 | // bits: |0 1 2|3|4 .. 5|6 .. 8|9 ... 31| |
| 591 | // |C R V|U|GCAttr|Lifetime|AddressSpace| |
| 592 | uint32_t Mask = 0; |
| 593 | |
| 594 | static const uint32_t UMask = 0x8; |
| 595 | static const uint32_t UShift = 3; |
| 596 | static const uint32_t GCAttrMask = 0x30; |
| 597 | static const uint32_t GCAttrShift = 4; |
| 598 | static const uint32_t LifetimeMask = 0x1C0; |
| 599 | static const uint32_t LifetimeShift = 6; |
| 600 | static const uint32_t AddressSpaceMask = |
| 601 | ~(CVRMask | UMask | GCAttrMask | LifetimeMask); |
| 602 | static const uint32_t AddressSpaceShift = 9; |
| 603 | }; |
| 604 | |
| 605 | /// A std::pair-like structure for storing a qualified type split |
| 606 | /// into its local qualifiers and its locally-unqualified type. |
| 607 | struct SplitQualType { |
| 608 | /// The locally-unqualified type. |
| 609 | const Type *Ty = nullptr; |
| 610 | |
| 611 | /// The local qualifiers. |
| 612 | Qualifiers Quals; |
| 613 | |
| 614 | SplitQualType() = default; |
| 615 | SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} |
| 616 | |
| 617 | SplitQualType getSingleStepDesugaredType() const; // end of this file |
| 618 | |
| 619 | // Make std::tie work. |
| 620 | std::pair<const Type *,Qualifiers> asPair() const { |
| 621 | return std::pair<const Type *, Qualifiers>(Ty, Quals); |
| 622 | } |
| 623 | |
| 624 | friend bool operator==(SplitQualType a, SplitQualType b) { |
| 625 | return a.Ty == b.Ty && a.Quals == b.Quals; |
| 626 | } |
| 627 | friend bool operator!=(SplitQualType a, SplitQualType b) { |
| 628 | return a.Ty != b.Ty || a.Quals != b.Quals; |
| 629 | } |
| 630 | }; |
| 631 | |
| 632 | /// The kind of type we are substituting Objective-C type arguments into. |
| 633 | /// |
| 634 | /// The kind of substitution affects the replacement of type parameters when |
| 635 | /// no concrete type information is provided, e.g., when dealing with an |
| 636 | /// unspecialized type. |
| 637 | enum class ObjCSubstitutionContext { |
| 638 | /// An ordinary type. |
| 639 | Ordinary, |
| 640 | |
| 641 | /// The result type of a method or function. |
| 642 | Result, |
| 643 | |
| 644 | /// The parameter type of a method or function. |
| 645 | Parameter, |
| 646 | |
| 647 | /// The type of a property. |
| 648 | Property, |
| 649 | |
| 650 | /// The superclass of a type. |
| 651 | Superclass, |
| 652 | }; |
| 653 | |
| 654 | /// A (possibly-)qualified type. |
| 655 | /// |
| 656 | /// For efficiency, we don't store CV-qualified types as nodes on their |
| 657 | /// own: instead each reference to a type stores the qualifiers. This |
| 658 | /// greatly reduces the number of nodes we need to allocate for types (for |
| 659 | /// example we only need one for 'int', 'const int', 'volatile int', |
| 660 | /// 'const volatile int', etc). |
| 661 | /// |
| 662 | /// As an added efficiency bonus, instead of making this a pair, we |
| 663 | /// just store the two bits we care about in the low bits of the |
| 664 | /// pointer. To handle the packing/unpacking, we make QualType be a |
| 665 | /// simple wrapper class that acts like a smart pointer. A third bit |
| 666 | /// indicates whether there are extended qualifiers present, in which |
| 667 | /// case the pointer points to a special structure. |
| 668 | class QualType { |
| 669 | friend class QualifierCollector; |
| 670 | |
| 671 | // Thankfully, these are efficiently composable. |
| 672 | llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>, |
| 673 | Qualifiers::FastWidth> Value; |
| 674 | |
| 675 | const ExtQuals *getExtQualsUnsafe() const { |
| 676 | return Value.getPointer().get<const ExtQuals*>(); |
| 677 | } |
| 678 | |
| 679 | const Type *getTypePtrUnsafe() const { |
| 680 | return Value.getPointer().get<const Type*>(); |
| 681 | } |
| 682 | |
| 683 | const ExtQualsTypeCommonBase *getCommonPtr() const { |
| 684 | assert(!isNull() && "Cannot retrieve a NULL type pointer")(static_cast <bool> (!isNull() && "Cannot retrieve a NULL type pointer" ) ? void (0) : __assert_fail ("!isNull() && \"Cannot retrieve a NULL type pointer\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 684, __extension__ __PRETTY_FUNCTION__)); |
| 685 | auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); |
| 686 | CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); |
| 687 | return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); |
| 688 | } |
| 689 | |
| 690 | public: |
| 691 | QualType() = default; |
| 692 | QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {} |
| 693 | QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {} |
| 694 | |
| 695 | unsigned getLocalFastQualifiers() const { return Value.getInt(); } |
| 696 | void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } |
| 697 | |
| 698 | /// Retrieves a pointer to the underlying (unqualified) type. |
| 699 | /// |
| 700 | /// This function requires that the type not be NULL. If the type might be |
| 701 | /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). |
| 702 | const Type *getTypePtr() const; |
| 703 | |
| 704 | const Type *getTypePtrOrNull() const; |
| 705 | |
| 706 | /// Retrieves a pointer to the name of the base type. |
| 707 | const IdentifierInfo *getBaseTypeIdentifier() const; |
| 708 | |
| 709 | /// Divides a QualType into its unqualified type and a set of local |
| 710 | /// qualifiers. |
| 711 | SplitQualType split() const; |
| 712 | |
| 713 | void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } |
| 714 | |
| 715 | static QualType getFromOpaquePtr(const void *Ptr) { |
| 716 | QualType T; |
| 717 | T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); |
| 718 | return T; |
| 719 | } |
| 720 | |
| 721 | const Type &operator*() const { |
| 722 | return *getTypePtr(); |
| 723 | } |
| 724 | |
| 725 | const Type *operator->() const { |
| 726 | return getTypePtr(); |
| 727 | } |
| 728 | |
| 729 | bool isCanonical() const; |
| 730 | bool isCanonicalAsParam() const; |
| 731 | |
| 732 | /// Return true if this QualType doesn't point to a type yet. |
| 733 | bool isNull() const { |
| 734 | return Value.getPointer().isNull(); |
| 735 | } |
| 736 | |
| 737 | /// Determine whether this particular QualType instance has the |
| 738 | /// "const" qualifier set, without looking through typedefs that may have |
| 739 | /// added "const" at a different level. |
| 740 | bool isLocalConstQualified() const { |
| 741 | return (getLocalFastQualifiers() & Qualifiers::Const); |
| 742 | } |
| 743 | |
| 744 | /// Determine whether this type is const-qualified. |
| 745 | bool isConstQualified() const; |
| 746 | |
| 747 | /// Determine whether this particular QualType instance has the |
| 748 | /// "restrict" qualifier set, without looking through typedefs that may have |
| 749 | /// added "restrict" at a different level. |
| 750 | bool isLocalRestrictQualified() const { |
| 751 | return (getLocalFastQualifiers() & Qualifiers::Restrict); |
| 752 | } |
| 753 | |
| 754 | /// Determine whether this type is restrict-qualified. |
| 755 | bool isRestrictQualified() const; |
| 756 | |
| 757 | /// Determine whether this particular QualType instance has the |
| 758 | /// "volatile" qualifier set, without looking through typedefs that may have |
| 759 | /// added "volatile" at a different level. |
| 760 | bool isLocalVolatileQualified() const { |
| 761 | return (getLocalFastQualifiers() & Qualifiers::Volatile); |
| 762 | } |
| 763 | |
| 764 | /// Determine whether this type is volatile-qualified. |
| 765 | bool isVolatileQualified() const; |
| 766 | |
| 767 | /// Determine whether this particular QualType instance has any |
| 768 | /// qualifiers, without looking through any typedefs that might add |
| 769 | /// qualifiers at a different level. |
| 770 | bool hasLocalQualifiers() const { |
| 771 | return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); |
| 772 | } |
| 773 | |
| 774 | /// Determine whether this type has any qualifiers. |
| 775 | bool hasQualifiers() const; |
| 776 | |
| 777 | /// Determine whether this particular QualType instance has any |
| 778 | /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType |
| 779 | /// instance. |
| 780 | bool hasLocalNonFastQualifiers() const { |
| 781 | return Value.getPointer().is<const ExtQuals*>(); |
| 782 | } |
| 783 | |
| 784 | /// Retrieve the set of qualifiers local to this particular QualType |
| 785 | /// instance, not including any qualifiers acquired through typedefs or |
| 786 | /// other sugar. |
| 787 | Qualifiers getLocalQualifiers() const; |
| 788 | |
| 789 | /// Retrieve the set of qualifiers applied to this type. |
| 790 | Qualifiers getQualifiers() const; |
| 791 | |
| 792 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers |
| 793 | /// local to this particular QualType instance, not including any qualifiers |
| 794 | /// acquired through typedefs or other sugar. |
| 795 | unsigned getLocalCVRQualifiers() const { |
| 796 | return getLocalFastQualifiers(); |
| 797 | } |
| 798 | |
| 799 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers |
| 800 | /// applied to this type. |
| 801 | unsigned getCVRQualifiers() const; |
| 802 | |
| 803 | bool isConstant(const ASTContext& Ctx) const { |
| 804 | return QualType::isConstant(*this, Ctx); |
| 805 | } |
| 806 | |
| 807 | /// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). |
| 808 | bool isPODType(const ASTContext &Context) const; |
| 809 | |
| 810 | /// Return true if this is a POD type according to the rules of the C++98 |
| 811 | /// standard, regardless of the current compilation's language. |
| 812 | bool isCXX98PODType(const ASTContext &Context) const; |
| 813 | |
| 814 | /// Return true if this is a POD type according to the more relaxed rules |
| 815 | /// of the C++11 standard, regardless of the current compilation's language. |
| 816 | /// (C++0x [basic.types]p9). Note that, unlike |
| 817 | /// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account. |
| 818 | bool isCXX11PODType(const ASTContext &Context) const; |
| 819 | |
| 820 | /// Return true if this is a trivial type per (C++0x [basic.types]p9) |
| 821 | bool isTrivialType(const ASTContext &Context) const; |
| 822 | |
| 823 | /// Return true if this is a trivially copyable type (C++0x [basic.types]p9) |
| 824 | bool isTriviallyCopyableType(const ASTContext &Context) const; |
| 825 | |
| 826 | |
| 827 | /// Returns true if it is a class and it might be dynamic. |
| 828 | bool mayBeDynamicClass() const; |
| 829 | |
| 830 | /// Returns true if it is not a class or if the class might not be dynamic. |
| 831 | bool mayBeNotDynamicClass() const; |
| 832 | |
| 833 | // Don't promise in the API that anything besides 'const' can be |
| 834 | // easily added. |
| 835 | |
| 836 | /// Add the `const` type qualifier to this QualType. |
| 837 | void addConst() { |
| 838 | addFastQualifiers(Qualifiers::Const); |
| 839 | } |
| 840 | QualType withConst() const { |
| 841 | return withFastQualifiers(Qualifiers::Const); |
| 842 | } |
| 843 | |
| 844 | /// Add the `volatile` type qualifier to this QualType. |
| 845 | void addVolatile() { |
| 846 | addFastQualifiers(Qualifiers::Volatile); |
| 847 | } |
| 848 | QualType withVolatile() const { |
| 849 | return withFastQualifiers(Qualifiers::Volatile); |
| 850 | } |
| 851 | |
| 852 | /// Add the `restrict` qualifier to this QualType. |
| 853 | void addRestrict() { |
| 854 | addFastQualifiers(Qualifiers::Restrict); |
| 855 | } |
| 856 | QualType withRestrict() const { |
| 857 | return withFastQualifiers(Qualifiers::Restrict); |
| 858 | } |
| 859 | |
| 860 | QualType withCVRQualifiers(unsigned CVR) const { |
| 861 | return withFastQualifiers(CVR); |
| 862 | } |
| 863 | |
| 864 | void addFastQualifiers(unsigned TQs) { |
| 865 | assert(!(TQs & ~Qualifiers::FastMask)(static_cast <bool> (!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!") ? void (0 ) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 866, __extension__ __PRETTY_FUNCTION__)) |
| 866 | && "non-fast qualifier bits set in mask!")(static_cast <bool> (!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!") ? void (0 ) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 866, __extension__ __PRETTY_FUNCTION__)); |
| 867 | Value.setInt(Value.getInt() | TQs); |
| 868 | } |
| 869 | |
| 870 | void removeLocalConst(); |
| 871 | void removeLocalVolatile(); |
| 872 | void removeLocalRestrict(); |
| 873 | void removeLocalCVRQualifiers(unsigned Mask); |
| 874 | |
| 875 | void removeLocalFastQualifiers() { Value.setInt(0); } |
| 876 | void removeLocalFastQualifiers(unsigned Mask) { |
| 877 | assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers")(static_cast <bool> (!(Mask & ~Qualifiers::FastMask ) && "mask has non-fast qualifiers") ? void (0) : __assert_fail ("!(Mask & ~Qualifiers::FastMask) && \"mask has non-fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 877, __extension__ __PRETTY_FUNCTION__)); |
| 878 | Value.setInt(Value.getInt() & ~Mask); |
| 879 | } |
| 880 | |
| 881 | // Creates a type with the given qualifiers in addition to any |
| 882 | // qualifiers already on this type. |
| 883 | QualType withFastQualifiers(unsigned TQs) const { |
| 884 | QualType T = *this; |
| 885 | T.addFastQualifiers(TQs); |
| 886 | return T; |
| 887 | } |
| 888 | |
| 889 | // Creates a type with exactly the given fast qualifiers, removing |
| 890 | // any existing fast qualifiers. |
| 891 | QualType withExactLocalFastQualifiers(unsigned TQs) const { |
| 892 | return withoutLocalFastQualifiers().withFastQualifiers(TQs); |
| 893 | } |
| 894 | |
| 895 | // Removes fast qualifiers, but leaves any extended qualifiers in place. |
| 896 | QualType withoutLocalFastQualifiers() const { |
| 897 | QualType T = *this; |
| 898 | T.removeLocalFastQualifiers(); |
| 899 | return T; |
| 900 | } |
| 901 | |
| 902 | QualType getCanonicalType() const; |
| 903 | |
| 904 | /// Return this type with all of the instance-specific qualifiers |
| 905 | /// removed, but without removing any qualifiers that may have been applied |
| 906 | /// through typedefs. |
| 907 | QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } |
| 908 | |
| 909 | /// Retrieve the unqualified variant of the given type, |
| 910 | /// removing as little sugar as possible. |
| 911 | /// |
| 912 | /// This routine looks through various kinds of sugar to find the |
| 913 | /// least-desugared type that is unqualified. For example, given: |
| 914 | /// |
| 915 | /// \code |
| 916 | /// typedef int Integer; |
| 917 | /// typedef const Integer CInteger; |
| 918 | /// typedef CInteger DifferenceType; |
| 919 | /// \endcode |
| 920 | /// |
| 921 | /// Executing \c getUnqualifiedType() on the type \c DifferenceType will |
| 922 | /// desugar until we hit the type \c Integer, which has no qualifiers on it. |
| 923 | /// |
| 924 | /// The resulting type might still be qualified if it's sugar for an array |
| 925 | /// type. To strip qualifiers even from within a sugared array type, use |
| 926 | /// ASTContext::getUnqualifiedArrayType. |
| 927 | inline QualType getUnqualifiedType() const; |
| 928 | |
| 929 | /// Retrieve the unqualified variant of the given type, removing as little |
| 930 | /// sugar as possible. |
| 931 | /// |
| 932 | /// Like getUnqualifiedType(), but also returns the set of |
| 933 | /// qualifiers that were built up. |
| 934 | /// |
| 935 | /// The resulting type might still be qualified if it's sugar for an array |
| 936 | /// type. To strip qualifiers even from within a sugared array type, use |
| 937 | /// ASTContext::getUnqualifiedArrayType. |
| 938 | inline SplitQualType getSplitUnqualifiedType() const; |
| 939 | |
| 940 | /// Determine whether this type is more qualified than the other |
| 941 | /// given type, requiring exact equality for non-CVR qualifiers. |
| 942 | bool isMoreQualifiedThan(QualType Other) const; |
| 943 | |
| 944 | /// Determine whether this type is at least as qualified as the other |
| 945 | /// given type, requiring exact equality for non-CVR qualifiers. |
| 946 | bool isAtLeastAsQualifiedAs(QualType Other) const; |
| 947 | |
| 948 | QualType getNonReferenceType() const; |
| 949 | |
| 950 | /// Determine the type of a (typically non-lvalue) expression with the |
| 951 | /// specified result type. |
| 952 | /// |
| 953 | /// This routine should be used for expressions for which the return type is |
| 954 | /// explicitly specified (e.g., in a cast or call) and isn't necessarily |
| 955 | /// an lvalue. It removes a top-level reference (since there are no |
| 956 | /// expressions of reference type) and deletes top-level cvr-qualifiers |
| 957 | /// from non-class types (in C++) or all types (in C). |
| 958 | QualType getNonLValueExprType(const ASTContext &Context) const; |
| 959 | |
| 960 | /// Remove an outer pack expansion type (if any) from this type. Used as part |
| 961 | /// of converting the type of a declaration to the type of an expression that |
| 962 | /// references that expression. It's meaningless for an expression to have a |
| 963 | /// pack expansion type. |
| 964 | QualType getNonPackExpansionType() const; |
| 965 | |
| 966 | /// Return the specified type with any "sugar" removed from |
| 967 | /// the type. This takes off typedefs, typeof's etc. If the outer level of |
| 968 | /// the type is already concrete, it returns it unmodified. This is similar |
| 969 | /// to getting the canonical type, but it doesn't remove *all* typedefs. For |
| 970 | /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is |
| 971 | /// concrete. |
| 972 | /// |
| 973 | /// Qualifiers are left in place. |
| 974 | QualType getDesugaredType(const ASTContext &Context) const { |
| 975 | return getDesugaredType(*this, Context); |
| 976 | } |
| 977 | |
| 978 | SplitQualType getSplitDesugaredType() const { |
| 979 | return getSplitDesugaredType(*this); |
| 980 | } |
| 981 | |
| 982 | /// Return the specified type with one level of "sugar" removed from |
| 983 | /// the type. |
| 984 | /// |
| 985 | /// This routine takes off the first typedef, typeof, etc. If the outer level |
| 986 | /// of the type is already concrete, it returns it unmodified. |
| 987 | QualType getSingleStepDesugaredType(const ASTContext &Context) const { |
| 988 | return getSingleStepDesugaredTypeImpl(*this, Context); |
| 989 | } |
| 990 | |
| 991 | /// Returns the specified type after dropping any |
| 992 | /// outer-level parentheses. |
| 993 | QualType IgnoreParens() const { |
| 994 | if (isa<ParenType>(*this)) |
| 995 | return QualType::IgnoreParens(*this); |
| 996 | return *this; |
| 997 | } |
| 998 | |
| 999 | /// Indicate whether the specified types and qualifiers are identical. |
| 1000 | friend bool operator==(const QualType &LHS, const QualType &RHS) { |
| 1001 | return LHS.Value == RHS.Value; |
| 1002 | } |
| 1003 | friend bool operator!=(const QualType &LHS, const QualType &RHS) { |
| 1004 | return LHS.Value != RHS.Value; |
| 1005 | } |
| 1006 | friend bool operator<(const QualType &LHS, const QualType &RHS) { |
| 1007 | return LHS.Value < RHS.Value; |
| 1008 | } |
| 1009 | |
| 1010 | static std::string getAsString(SplitQualType split, |
| 1011 | const PrintingPolicy &Policy) { |
| 1012 | return getAsString(split.Ty, split.Quals, Policy); |
| 1013 | } |
| 1014 | static std::string getAsString(const Type *ty, Qualifiers qs, |
| 1015 | const PrintingPolicy &Policy); |
| 1016 | |
| 1017 | std::string getAsString() const; |
| 1018 | std::string getAsString(const PrintingPolicy &Policy) const; |
| 1019 | |
| 1020 | void print(raw_ostream &OS, const PrintingPolicy &Policy, |
| 1021 | const Twine &PlaceHolder = Twine(), |
| 1022 | unsigned Indentation = 0) const; |
| 1023 | |
| 1024 | static void print(SplitQualType split, raw_ostream &OS, |
| 1025 | const PrintingPolicy &policy, const Twine &PlaceHolder, |
| 1026 | unsigned Indentation = 0) { |
| 1027 | return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation); |
| 1028 | } |
| 1029 | |
| 1030 | static void print(const Type *ty, Qualifiers qs, |
| 1031 | raw_ostream &OS, const PrintingPolicy &policy, |
| 1032 | const Twine &PlaceHolder, |
| 1033 | unsigned Indentation = 0); |
| 1034 | |
| 1035 | void getAsStringInternal(std::string &Str, |
| 1036 | const PrintingPolicy &Policy) const; |
| 1037 | |
| 1038 | static void getAsStringInternal(SplitQualType split, std::string &out, |
| 1039 | const PrintingPolicy &policy) { |
| 1040 | return getAsStringInternal(split.Ty, split.Quals, out, policy); |
| 1041 | } |
| 1042 | |
| 1043 | static void getAsStringInternal(const Type *ty, Qualifiers qs, |
| 1044 | std::string &out, |
| 1045 | const PrintingPolicy &policy); |
| 1046 | |
| 1047 | class StreamedQualTypeHelper { |
| 1048 | const QualType &T; |
| 1049 | const PrintingPolicy &Policy; |
| 1050 | const Twine &PlaceHolder; |
| 1051 | unsigned Indentation; |
| 1052 | |
| 1053 | public: |
| 1054 | StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, |
| 1055 | const Twine &PlaceHolder, unsigned Indentation) |
| 1056 | : T(T), Policy(Policy), PlaceHolder(PlaceHolder), |
| 1057 | Indentation(Indentation) {} |
| 1058 | |
| 1059 | friend raw_ostream &operator<<(raw_ostream &OS, |
| 1060 | const StreamedQualTypeHelper &SQT) { |
| 1061 | SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation); |
| 1062 | return OS; |
| 1063 | } |
| 1064 | }; |
| 1065 | |
| 1066 | StreamedQualTypeHelper stream(const PrintingPolicy &Policy, |
| 1067 | const Twine &PlaceHolder = Twine(), |
| 1068 | unsigned Indentation = 0) const { |
| 1069 | return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation); |
| 1070 | } |
| 1071 | |
| 1072 | void dump(const char *s) const; |
| 1073 | void dump() const; |
| 1074 | void dump(llvm::raw_ostream &OS, const ASTContext &Context) const; |
| 1075 | |
| 1076 | void Profile(llvm::FoldingSetNodeID &ID) const { |
| 1077 | ID.AddPointer(getAsOpaquePtr()); |
| 1078 | } |
| 1079 | |
| 1080 | /// Check if this type has any address space qualifier. |
| 1081 | inline bool hasAddressSpace() const; |
| 1082 | |
| 1083 | /// Return the address space of this type. |
| 1084 | inline LangAS getAddressSpace() const; |
| 1085 | |
| 1086 | /// Returns true if address space qualifiers overlap with T address space |
| 1087 | /// qualifiers. |
| 1088 | /// OpenCL C defines conversion rules for pointers to different address spaces |
| 1089 | /// and notion of overlapping address spaces. |
| 1090 | /// CL1.1 or CL1.2: |
| 1091 | /// address spaces overlap iff they are they same. |
| 1092 | /// OpenCL C v2.0 s6.5.5 adds: |
| 1093 | /// __generic overlaps with any address space except for __constant. |
| 1094 | bool isAddressSpaceOverlapping(QualType T) const { |
| 1095 | Qualifiers Q = getQualifiers(); |
| 1096 | Qualifiers TQ = T.getQualifiers(); |
| 1097 | // Address spaces overlap if at least one of them is a superset of another |
| 1098 | return Q.isAddressSpaceSupersetOf(TQ) || TQ.isAddressSpaceSupersetOf(Q); |
| 1099 | } |
| 1100 | |
| 1101 | /// Returns gc attribute of this type. |
| 1102 | inline Qualifiers::GC getObjCGCAttr() const; |
| 1103 | |
| 1104 | /// true when Type is objc's weak. |
| 1105 | bool isObjCGCWeak() const { |
| 1106 | return getObjCGCAttr() == Qualifiers::Weak; |
| 1107 | } |
| 1108 | |
| 1109 | /// true when Type is objc's strong. |
| 1110 | bool isObjCGCStrong() const { |
| 1111 | return getObjCGCAttr() == Qualifiers::Strong; |
| 1112 | } |
| 1113 | |
| 1114 | /// Returns lifetime attribute of this type. |
| 1115 | Qualifiers::ObjCLifetime getObjCLifetime() const { |
| 1116 | return getQualifiers().getObjCLifetime(); |
| 1117 | } |
| 1118 | |
| 1119 | bool hasNonTrivialObjCLifetime() const { |
| 1120 | return getQualifiers().hasNonTrivialObjCLifetime(); |
| 1121 | } |
| 1122 | |
| 1123 | bool hasStrongOrWeakObjCLifetime() const { |
| 1124 | return getQualifiers().hasStrongOrWeakObjCLifetime(); |
| 1125 | } |
| 1126 | |
| 1127 | // true when Type is objc's weak and weak is enabled but ARC isn't. |
| 1128 | bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const; |
| 1129 | |
| 1130 | enum PrimitiveDefaultInitializeKind { |
| 1131 | /// The type does not fall into any of the following categories. Note that |
| 1132 | /// this case is zero-valued so that values of this enum can be used as a |
| 1133 | /// boolean condition for non-triviality. |
| 1134 | PDIK_Trivial, |
| 1135 | |
| 1136 | /// The type is an Objective-C retainable pointer type that is qualified |
| 1137 | /// with the ARC __strong qualifier. |
| 1138 | PDIK_ARCStrong, |
| 1139 | |
| 1140 | /// The type is an Objective-C retainable pointer type that is qualified |
| 1141 | /// with the ARC __weak qualifier. |
| 1142 | PDIK_ARCWeak, |
| 1143 | |
| 1144 | /// The type is a struct containing a field whose type is not PCK_Trivial. |
| 1145 | PDIK_Struct |
| 1146 | }; |
| 1147 | |
| 1148 | /// Functions to query basic properties of non-trivial C struct types. |
| 1149 | |
| 1150 | /// Check if this is a non-trivial type that would cause a C struct |
| 1151 | /// transitively containing this type to be non-trivial to default initialize |
| 1152 | /// and return the kind. |
| 1153 | PrimitiveDefaultInitializeKind |
| 1154 | isNonTrivialToPrimitiveDefaultInitialize() const; |
| 1155 | |
| 1156 | enum PrimitiveCopyKind { |
| 1157 | /// The type does not fall into any of the following categories. Note that |
| 1158 | /// this case is zero-valued so that values of this enum can be used as a |
| 1159 | /// boolean condition for non-triviality. |
| 1160 | PCK_Trivial, |
| 1161 | |
| 1162 | /// The type would be trivial except that it is volatile-qualified. Types |
| 1163 | /// that fall into one of the other non-trivial cases may additionally be |
| 1164 | /// volatile-qualified. |
| 1165 | PCK_VolatileTrivial, |
| 1166 | |
| 1167 | /// The type is an Objective-C retainable pointer type that is qualified |
| 1168 | /// with the ARC __strong qualifier. |
| 1169 | PCK_ARCStrong, |
| 1170 | |
| 1171 | /// The type is an Objective-C retainable pointer type that is qualified |
| 1172 | /// with the ARC __weak qualifier. |
| 1173 | PCK_ARCWeak, |
| 1174 | |
| 1175 | /// The type is a struct containing a field whose type is neither |
| 1176 | /// PCK_Trivial nor PCK_VolatileTrivial. |
| 1177 | /// Note that a C++ struct type does not necessarily match this; C++ copying |
| 1178 | /// semantics are too complex to express here, in part because they depend |
| 1179 | /// on the exact constructor or assignment operator that is chosen by |
| 1180 | /// overload resolution to do the copy. |
| 1181 | PCK_Struct |
| 1182 | }; |
| 1183 | |
| 1184 | /// Check if this is a non-trivial type that would cause a C struct |
| 1185 | /// transitively containing this type to be non-trivial to copy and return the |
| 1186 | /// kind. |
| 1187 | PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const; |
| 1188 | |
| 1189 | /// Check if this is a non-trivial type that would cause a C struct |
| 1190 | /// transitively containing this type to be non-trivial to destructively |
| 1191 | /// move and return the kind. Destructive move in this context is a C++-style |
| 1192 | /// move in which the source object is placed in a valid but unspecified state |
| 1193 | /// after it is moved, as opposed to a truly destructive move in which the |
| 1194 | /// source object is placed in an uninitialized state. |
| 1195 | PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const; |
| 1196 | |
| 1197 | enum DestructionKind { |
| 1198 | DK_none, |
| 1199 | DK_cxx_destructor, |
| 1200 | DK_objc_strong_lifetime, |
| 1201 | DK_objc_weak_lifetime, |
| 1202 | DK_nontrivial_c_struct |
| 1203 | }; |
| 1204 | |
| 1205 | /// Returns a nonzero value if objects of this type require |
| 1206 | /// non-trivial work to clean up after. Non-zero because it's |
| 1207 | /// conceivable that qualifiers (objc_gc(weak)?) could make |
| 1208 | /// something require destruction. |
| 1209 | DestructionKind isDestructedType() const { |
| 1210 | return isDestructedTypeImpl(*this); |
| 1211 | } |
| 1212 | |
| 1213 | /// Check if this is or contains a C union that is non-trivial to |
| 1214 | /// default-initialize, which is a union that has a member that is non-trivial |
| 1215 | /// to default-initialize. If this returns true, |
| 1216 | /// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct. |
| 1217 | bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const; |
| 1218 | |
| 1219 | /// Check if this is or contains a C union that is non-trivial to destruct, |
| 1220 | /// which is a union that has a member that is non-trivial to destruct. If |
| 1221 | /// this returns true, isDestructedType returns DK_nontrivial_c_struct. |
| 1222 | bool hasNonTrivialToPrimitiveDestructCUnion() const; |
| 1223 | |
| 1224 | /// Check if this is or contains a C union that is non-trivial to copy, which |
| 1225 | /// is a union that has a member that is non-trivial to copy. If this returns |
| 1226 | /// true, isNonTrivialToPrimitiveCopy returns PCK_Struct. |
| 1227 | bool hasNonTrivialToPrimitiveCopyCUnion() const; |
| 1228 | |
| 1229 | /// Determine whether expressions of the given type are forbidden |
| 1230 | /// from being lvalues in C. |
| 1231 | /// |
| 1232 | /// The expression types that are forbidden to be lvalues are: |
| 1233 | /// - 'void', but not qualified void |
| 1234 | /// - function types |
| 1235 | /// |
| 1236 | /// The exact rule here is C99 6.3.2.1: |
| 1237 | /// An lvalue is an expression with an object type or an incomplete |
| 1238 | /// type other than void. |
| 1239 | bool isCForbiddenLValueType() const; |
| 1240 | |
| 1241 | /// Substitute type arguments for the Objective-C type parameters used in the |
| 1242 | /// subject type. |
| 1243 | /// |
| 1244 | /// \param ctx ASTContext in which the type exists. |
| 1245 | /// |
| 1246 | /// \param typeArgs The type arguments that will be substituted for the |
| 1247 | /// Objective-C type parameters in the subject type, which are generally |
| 1248 | /// computed via \c Type::getObjCSubstitutions. If empty, the type |
| 1249 | /// parameters will be replaced with their bounds or id/Class, as appropriate |
| 1250 | /// for the context. |
| 1251 | /// |
| 1252 | /// \param context The context in which the subject type was written. |
| 1253 | /// |
| 1254 | /// \returns the resulting type. |
| 1255 | QualType substObjCTypeArgs(ASTContext &ctx, |
| 1256 | ArrayRef<QualType> typeArgs, |
| 1257 | ObjCSubstitutionContext context) const; |
| 1258 | |
| 1259 | /// Substitute type arguments from an object type for the Objective-C type |
| 1260 | /// parameters used in the subject type. |
| 1261 | /// |
| 1262 | /// This operation combines the computation of type arguments for |
| 1263 | /// substitution (\c Type::getObjCSubstitutions) with the actual process of |
| 1264 | /// substitution (\c QualType::substObjCTypeArgs) for the convenience of |
| 1265 | /// callers that need to perform a single substitution in isolation. |
| 1266 | /// |
| 1267 | /// \param objectType The type of the object whose member type we're |
| 1268 | /// substituting into. For example, this might be the receiver of a message |
| 1269 | /// or the base of a property access. |
| 1270 | /// |
| 1271 | /// \param dc The declaration context from which the subject type was |
| 1272 | /// retrieved, which indicates (for example) which type parameters should |
| 1273 | /// be substituted. |
| 1274 | /// |
| 1275 | /// \param context The context in which the subject type was written. |
| 1276 | /// |
| 1277 | /// \returns the subject type after replacing all of the Objective-C type |
| 1278 | /// parameters with their corresponding arguments. |
| 1279 | QualType substObjCMemberType(QualType objectType, |
| 1280 | const DeclContext *dc, |
| 1281 | ObjCSubstitutionContext context) const; |
| 1282 | |
| 1283 | /// Strip Objective-C "__kindof" types from the given type. |
| 1284 | QualType stripObjCKindOfType(const ASTContext &ctx) const; |
| 1285 | |
| 1286 | /// Remove all qualifiers including _Atomic. |
| 1287 | QualType getAtomicUnqualifiedType() const; |
| 1288 | |
| 1289 | private: |
| 1290 | // These methods are implemented in a separate translation unit; |
| 1291 | // "static"-ize them to avoid creating temporary QualTypes in the |
| 1292 | // caller. |
| 1293 | static bool isConstant(QualType T, const ASTContext& Ctx); |
| 1294 | static QualType getDesugaredType(QualType T, const ASTContext &Context); |
| 1295 | static SplitQualType getSplitDesugaredType(QualType T); |
| 1296 | static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); |
| 1297 | static QualType getSingleStepDesugaredTypeImpl(QualType type, |
| 1298 | const ASTContext &C); |
| 1299 | static QualType IgnoreParens(QualType T); |
| 1300 | static DestructionKind isDestructedTypeImpl(QualType type); |
| 1301 | |
| 1302 | /// Check if \param RD is or contains a non-trivial C union. |
| 1303 | static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD); |
| 1304 | static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD); |
| 1305 | static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD); |
| 1306 | }; |
| 1307 | |
| 1308 | } // namespace clang |
| 1309 | |
| 1310 | namespace llvm { |
| 1311 | |
| 1312 | /// Implement simplify_type for QualType, so that we can dyn_cast from QualType |
| 1313 | /// to a specific Type class. |
| 1314 | template<> struct simplify_type< ::clang::QualType> { |
| 1315 | using SimpleType = const ::clang::Type *; |
| 1316 | |
| 1317 | static SimpleType getSimplifiedValue(::clang::QualType Val) { |
| 1318 | return Val.getTypePtr(); |
| 1319 | } |
| 1320 | }; |
| 1321 | |
| 1322 | // Teach SmallPtrSet that QualType is "basically a pointer". |
| 1323 | template<> |
| 1324 | struct PointerLikeTypeTraits<clang::QualType> { |
| 1325 | static inline void *getAsVoidPointer(clang::QualType P) { |
| 1326 | return P.getAsOpaquePtr(); |
| 1327 | } |
| 1328 | |
| 1329 | static inline clang::QualType getFromVoidPointer(void *P) { |
| 1330 | return clang::QualType::getFromOpaquePtr(P); |
| 1331 | } |
| 1332 | |
| 1333 | // Various qualifiers go in low bits. |
| 1334 | static constexpr int NumLowBitsAvailable = 0; |
| 1335 | }; |
| 1336 | |
| 1337 | } // namespace llvm |
| 1338 | |
| 1339 | namespace clang { |
| 1340 | |
| 1341 | /// Base class that is common to both the \c ExtQuals and \c Type |
| 1342 | /// classes, which allows \c QualType to access the common fields between the |
| 1343 | /// two. |
| 1344 | class ExtQualsTypeCommonBase { |
| 1345 | friend class ExtQuals; |
| 1346 | friend class QualType; |
| 1347 | friend class Type; |
| 1348 | |
| 1349 | /// The "base" type of an extended qualifiers type (\c ExtQuals) or |
| 1350 | /// a self-referential pointer (for \c Type). |
| 1351 | /// |
| 1352 | /// This pointer allows an efficient mapping from a QualType to its |
| 1353 | /// underlying type pointer. |
| 1354 | const Type *const BaseType; |
| 1355 | |
| 1356 | /// The canonical type of this type. A QualType. |
| 1357 | QualType CanonicalType; |
| 1358 | |
| 1359 | ExtQualsTypeCommonBase(const Type *baseType, QualType canon) |
| 1360 | : BaseType(baseType), CanonicalType(canon) {} |
| 1361 | }; |
| 1362 | |
| 1363 | /// We can encode up to four bits in the low bits of a |
| 1364 | /// type pointer, but there are many more type qualifiers that we want |
| 1365 | /// to be able to apply to an arbitrary type. Therefore we have this |
| 1366 | /// struct, intended to be heap-allocated and used by QualType to |
| 1367 | /// store qualifiers. |
| 1368 | /// |
| 1369 | /// The current design tags the 'const', 'restrict', and 'volatile' qualifiers |
| 1370 | /// in three low bits on the QualType pointer; a fourth bit records whether |
| 1371 | /// the pointer is an ExtQuals node. The extended qualifiers (address spaces, |
| 1372 | /// Objective-C GC attributes) are much more rare. |
| 1373 | class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { |
| 1374 | // NOTE: changing the fast qualifiers should be straightforward as |
| 1375 | // long as you don't make 'const' non-fast. |
| 1376 | // 1. Qualifiers: |
| 1377 | // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). |
| 1378 | // Fast qualifiers must occupy the low-order bits. |
| 1379 | // b) Update Qualifiers::FastWidth and FastMask. |
| 1380 | // 2. QualType: |
| 1381 | // a) Update is{Volatile,Restrict}Qualified(), defined inline. |
| 1382 | // b) Update remove{Volatile,Restrict}, defined near the end of |
| 1383 | // this header. |
| 1384 | // 3. ASTContext: |
| 1385 | // a) Update get{Volatile,Restrict}Type. |
| 1386 | |
| 1387 | /// The immutable set of qualifiers applied by this node. Always contains |
| 1388 | /// extended qualifiers. |
| 1389 | Qualifiers Quals; |
| 1390 | |
| 1391 | ExtQuals *this_() { return this; } |
| 1392 | |
| 1393 | public: |
| 1394 | ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) |
| 1395 | : ExtQualsTypeCommonBase(baseType, |
| 1396 | canon.isNull() ? QualType(this_(), 0) : canon), |
| 1397 | Quals(quals) { |
| 1398 | assert(Quals.hasNonFastQualifiers()(static_cast <bool> (Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers") ? void (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 1399, __extension__ __PRETTY_FUNCTION__)) |
| 1399 | && "ExtQuals created with no fast qualifiers")(static_cast <bool> (Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers") ? void (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 1399, __extension__ __PRETTY_FUNCTION__)); |
| 1400 | assert(!Quals.hasFastQualifiers()(static_cast <bool> (!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers") ? void (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 1401, __extension__ __PRETTY_FUNCTION__)) |
| 1401 | && "ExtQuals created with fast qualifiers")(static_cast <bool> (!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers") ? void (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 1401, __extension__ __PRETTY_FUNCTION__)); |
| 1402 | } |
| 1403 | |
| 1404 | Qualifiers getQualifiers() const { return Quals; } |
| 1405 | |
| 1406 | bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } |
| 1407 | Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } |
| 1408 | |
| 1409 | bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } |
| 1410 | Qualifiers::ObjCLifetime getObjCLifetime() const { |
| 1411 | return Quals.getObjCLifetime(); |
| 1412 | } |
| 1413 | |
| 1414 | bool hasAddressSpace() const { return Quals.hasAddressSpace(); } |
| 1415 | LangAS getAddressSpace() const { return Quals.getAddressSpace(); } |
| 1416 | |
| 1417 | const Type *getBaseType() const { return BaseType; } |
| 1418 | |
| 1419 | public: |
| 1420 | void Profile(llvm::FoldingSetNodeID &ID) const { |
| 1421 | Profile(ID, getBaseType(), Quals); |
| 1422 | } |
| 1423 | |
| 1424 | static void Profile(llvm::FoldingSetNodeID &ID, |
| 1425 | const Type *BaseType, |
| 1426 | Qualifiers Quals) { |
| 1427 | assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!")(static_cast <bool> (!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!") ? void (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"fast qualifiers in ExtQuals hash!\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 1427, __extension__ __PRETTY_FUNCTION__)); |
| 1428 | ID.AddPointer(BaseType); |
| 1429 | Quals.Profile(ID); |
| 1430 | } |
| 1431 | }; |
| 1432 | |
| 1433 | /// The kind of C++11 ref-qualifier associated with a function type. |
| 1434 | /// This determines whether a member function's "this" object can be an |
| 1435 | /// lvalue, rvalue, or neither. |
| 1436 | enum RefQualifierKind { |
| 1437 | /// No ref-qualifier was provided. |
| 1438 | RQ_None = 0, |
| 1439 | |
| 1440 | /// An lvalue ref-qualifier was provided (\c &). |
| 1441 | RQ_LValue, |
| 1442 | |
| 1443 | /// An rvalue ref-qualifier was provided (\c &&). |
| 1444 | RQ_RValue |
| 1445 | }; |
| 1446 | |
| 1447 | /// Which keyword(s) were used to create an AutoType. |
| 1448 | enum class AutoTypeKeyword { |
| 1449 | /// auto |
| 1450 | Auto, |
| 1451 | |
| 1452 | /// decltype(auto) |
| 1453 | DecltypeAuto, |
| 1454 | |
| 1455 | /// __auto_type (GNU extension) |
| 1456 | GNUAutoType |
| 1457 | }; |
| 1458 | |
| 1459 | /// The base class of the type hierarchy. |
| 1460 | /// |
| 1461 | /// A central concept with types is that each type always has a canonical |
| 1462 | /// type. A canonical type is the type with any typedef names stripped out |
| 1463 | /// of it or the types it references. For example, consider: |
| 1464 | /// |
| 1465 | /// typedef int foo; |
| 1466 | /// typedef foo* bar; |
| 1467 | /// 'int *' 'foo *' 'bar' |
| 1468 | /// |
| 1469 | /// There will be a Type object created for 'int'. Since int is canonical, its |
| 1470 | /// CanonicalType pointer points to itself. There is also a Type for 'foo' (a |
| 1471 | /// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next |
| 1472 | /// there is a PointerType that represents 'int*', which, like 'int', is |
| 1473 | /// canonical. Finally, there is a PointerType type for 'foo*' whose canonical |
| 1474 | /// type is 'int*', and there is a TypedefType for 'bar', whose canonical type |
| 1475 | /// is also 'int*'. |
| 1476 | /// |
| 1477 | /// Non-canonical types are useful for emitting diagnostics, without losing |
| 1478 | /// information about typedefs being used. Canonical types are useful for type |
| 1479 | /// comparisons (they allow by-pointer equality tests) and useful for reasoning |
| 1480 | /// about whether something has a particular form (e.g. is a function type), |
| 1481 | /// because they implicitly, recursively, strip all typedefs out of a type. |
| 1482 | /// |
| 1483 | /// Types, once created, are immutable. |
| 1484 | /// |
| 1485 | class alignas(8) Type : public ExtQualsTypeCommonBase { |
| 1486 | public: |
| 1487 | enum TypeClass { |
| 1488 | #define TYPE(Class, Base) Class, |
| 1489 | #define LAST_TYPE(Class) TypeLast = Class |
| 1490 | #define ABSTRACT_TYPE(Class, Base) |
| 1491 | #include "clang/AST/TypeNodes.inc" |
| 1492 | }; |
| 1493 | |
| 1494 | private: |
| 1495 | /// Bitfields required by the Type class. |
| 1496 | class TypeBitfields { |
| 1497 | friend class Type; |
| 1498 | template <class T> friend class TypePropertyCache; |
| 1499 | |
| 1500 | /// TypeClass bitfield - Enum that specifies what subclass this belongs to. |
| 1501 | unsigned TC : 8; |
| 1502 | |
| 1503 | /// Store information on the type dependency. |
| 1504 | unsigned Dependence : llvm::BitWidth<TypeDependence>; |
| 1505 | |
| 1506 | /// True if the cache (i.e. the bitfields here starting with |
| 1507 | /// 'Cache') is valid. |
| 1508 | mutable unsigned CacheValid : 1; |
| 1509 | |
| 1510 | /// Linkage of this type. |
| 1511 | mutable unsigned CachedLinkage : 3; |
| 1512 | |
| 1513 | /// Whether this type involves and local or unnamed types. |
| 1514 | mutable unsigned CachedLocalOrUnnamed : 1; |
| 1515 | |
| 1516 | /// Whether this type comes from an AST file. |
| 1517 | mutable unsigned FromAST : 1; |
| 1518 | |
| 1519 | bool isCacheValid() const { |
| 1520 | return CacheValid; |
| 1521 | } |
| 1522 | |
| 1523 | Linkage getLinkage() const { |
| 1524 | assert(isCacheValid() && "getting linkage from invalid cache")(static_cast <bool> (isCacheValid() && "getting linkage from invalid cache" ) ? void (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 1524, __extension__ __PRETTY_FUNCTION__)); |
| 1525 | return static_cast<Linkage>(CachedLinkage); |
| 1526 | } |
| 1527 | |
| 1528 | bool hasLocalOrUnnamedType() const { |
| 1529 | assert(isCacheValid() && "getting linkage from invalid cache")(static_cast <bool> (isCacheValid() && "getting linkage from invalid cache" ) ? void (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 1529, __extension__ __PRETTY_FUNCTION__)); |
| 1530 | return CachedLocalOrUnnamed; |
| 1531 | } |
| 1532 | }; |
| 1533 | enum { NumTypeBits = 8 + llvm::BitWidth<TypeDependence> + 6 }; |
| 1534 | |
| 1535 | protected: |
| 1536 | // These classes allow subclasses to somewhat cleanly pack bitfields |
| 1537 | // into Type. |
| 1538 | |
| 1539 | class ArrayTypeBitfields { |
| 1540 | friend class ArrayType; |
| 1541 | |
| 1542 | unsigned : NumTypeBits; |
| 1543 | |
| 1544 | /// CVR qualifiers from declarations like |
| 1545 | /// 'int X[static restrict 4]'. For function parameters only. |
| 1546 | unsigned IndexTypeQuals : 3; |
| 1547 | |
| 1548 | /// Storage class qualifiers from declarations like |
| 1549 | /// 'int X[static restrict 4]'. For function parameters only. |
| 1550 | /// Actually an ArrayType::ArraySizeModifier. |
| 1551 | unsigned SizeModifier : 3; |
| 1552 | }; |
| 1553 | |
| 1554 | class ConstantArrayTypeBitfields { |
| 1555 | friend class ConstantArrayType; |
| 1556 | |
| 1557 | unsigned : NumTypeBits + 3 + 3; |
| 1558 | |
| 1559 | /// Whether we have a stored size expression. |
| 1560 | unsigned HasStoredSizeExpr : 1; |
| 1561 | }; |
| 1562 | |
| 1563 | class BuiltinTypeBitfields { |
| 1564 | friend class BuiltinType; |
| 1565 | |
| 1566 | unsigned : NumTypeBits; |
| 1567 | |
| 1568 | /// The kind (BuiltinType::Kind) of builtin type this is. |
| 1569 | unsigned Kind : 8; |
| 1570 | }; |
| 1571 | |
| 1572 | /// FunctionTypeBitfields store various bits belonging to FunctionProtoType. |
| 1573 | /// Only common bits are stored here. Additional uncommon bits are stored |
| 1574 | /// in a trailing object after FunctionProtoType. |
| 1575 | class FunctionTypeBitfields { |
| 1576 | friend class FunctionProtoType; |
| 1577 | friend class FunctionType; |
| 1578 | |
| 1579 | unsigned : NumTypeBits; |
| 1580 | |
| 1581 | /// Extra information which affects how the function is called, like |
| 1582 | /// regparm and the calling convention. |
| 1583 | unsigned ExtInfo : 13; |
| 1584 | |
| 1585 | /// The ref-qualifier associated with a \c FunctionProtoType. |
| 1586 | /// |
| 1587 | /// This is a value of type \c RefQualifierKind. |
| 1588 | unsigned RefQualifier : 2; |
| 1589 | |
| 1590 | /// Used only by FunctionProtoType, put here to pack with the |
| 1591 | /// other bitfields. |
| 1592 | /// The qualifiers are part of FunctionProtoType because... |
| 1593 | /// |
| 1594 | /// C++ 8.3.5p4: The return type, the parameter type list and the |
| 1595 | /// cv-qualifier-seq, [...], are part of the function type. |
| 1596 | unsigned FastTypeQuals : Qualifiers::FastWidth; |
| 1597 | /// Whether this function has extended Qualifiers. |
| 1598 | unsigned HasExtQuals : 1; |
| 1599 | |
| 1600 | /// The number of parameters this function has, not counting '...'. |
| 1601 | /// According to [implimits] 8 bits should be enough here but this is |
| 1602 | /// somewhat easy to exceed with metaprogramming and so we would like to |
| 1603 | /// keep NumParams as wide as reasonably possible. |
| 1604 | unsigned NumParams : 16; |
| 1605 | |
| 1606 | /// The type of exception specification this function has. |
| 1607 | unsigned ExceptionSpecType : 4; |
| 1608 | |
| 1609 | /// Whether this function has extended parameter information. |
| 1610 | unsigned HasExtParameterInfos : 1; |
| 1611 | |
| 1612 | /// Whether the function is variadic. |
| 1613 | unsigned Variadic : 1; |
| 1614 | |
| 1615 | /// Whether this function has a trailing return type. |
| 1616 | unsigned HasTrailingReturn : 1; |
| 1617 | }; |
| 1618 | |
| 1619 | class ObjCObjectTypeBitfields { |
| 1620 | friend class ObjCObjectType; |
| 1621 | |
| 1622 | unsigned : NumTypeBits; |
| 1623 | |
| 1624 | /// The number of type arguments stored directly on this object type. |
| 1625 | unsigned NumTypeArgs : 7; |
| 1626 | |
| 1627 | /// The number of protocols stored directly on this object type. |
| 1628 | unsigned NumProtocols : 6; |
| 1629 | |
| 1630 | /// Whether this is a "kindof" type. |
| 1631 | unsigned IsKindOf : 1; |
| 1632 | }; |
| 1633 | |
| 1634 | class ReferenceTypeBitfields { |
| 1635 | friend class ReferenceType; |
| 1636 | |
| 1637 | unsigned : NumTypeBits; |
| 1638 | |
| 1639 | /// True if the type was originally spelled with an lvalue sigil. |
| 1640 | /// This is never true of rvalue references but can also be false |
| 1641 | /// on lvalue references because of C++0x [dcl.typedef]p9, |
| 1642 | /// as follows: |
| 1643 | /// |
| 1644 | /// typedef int &ref; // lvalue, spelled lvalue |
| 1645 | /// typedef int &&rvref; // rvalue |
| 1646 | /// ref &a; // lvalue, inner ref, spelled lvalue |
| 1647 | /// ref &&a; // lvalue, inner ref |
| 1648 | /// rvref &a; // lvalue, inner ref, spelled lvalue |
| 1649 | /// rvref &&a; // rvalue, inner ref |
| 1650 | unsigned SpelledAsLValue : 1; |
| 1651 | |
| 1652 | /// True if the inner type is a reference type. This only happens |
| 1653 | /// in non-canonical forms. |
| 1654 | unsigned InnerRef : 1; |
| 1655 | }; |
| 1656 | |
| 1657 | class TypeWithKeywordBitfields { |
| 1658 | friend class TypeWithKeyword; |
| 1659 | |
| 1660 | unsigned : NumTypeBits; |
| 1661 | |
| 1662 | /// An ElaboratedTypeKeyword. 8 bits for efficient access. |
| 1663 | unsigned Keyword : 8; |
| 1664 | }; |
| 1665 | |
| 1666 | enum { NumTypeWithKeywordBits = 8 }; |
| 1667 | |
| 1668 | class ElaboratedTypeBitfields { |
| 1669 | friend class ElaboratedType; |
| 1670 | |
| 1671 | unsigned : NumTypeBits; |
| 1672 | unsigned : NumTypeWithKeywordBits; |
| 1673 | |
| 1674 | /// Whether the ElaboratedType has a trailing OwnedTagDecl. |
| 1675 | unsigned HasOwnedTagDecl : 1; |
| 1676 | }; |
| 1677 | |
| 1678 | class VectorTypeBitfields { |
| 1679 | friend class VectorType; |
| 1680 | friend class DependentVectorType; |
| 1681 | |
| 1682 | unsigned : NumTypeBits; |
| 1683 | |
| 1684 | /// The kind of vector, either a generic vector type or some |
| 1685 | /// target-specific vector type such as for AltiVec or Neon. |
| 1686 | unsigned VecKind : 3; |
| 1687 | /// The number of elements in the vector. |
| 1688 | uint32_t NumElements; |
| 1689 | }; |
| 1690 | |
| 1691 | class AttributedTypeBitfields { |
| 1692 | friend class AttributedType; |
| 1693 | |
| 1694 | unsigned : NumTypeBits; |
| 1695 | |
| 1696 | /// An AttributedType::Kind |
| 1697 | unsigned AttrKind : 32 - NumTypeBits; |
| 1698 | }; |
| 1699 | |
| 1700 | class AutoTypeBitfields { |
| 1701 | friend class AutoType; |
| 1702 | |
| 1703 | unsigned : NumTypeBits; |
| 1704 | |
| 1705 | /// Was this placeholder type spelled as 'auto', 'decltype(auto)', |
| 1706 | /// or '__auto_type'? AutoTypeKeyword value. |
| 1707 | unsigned Keyword : 2; |
| 1708 | |
| 1709 | /// The number of template arguments in the type-constraints, which is |
| 1710 | /// expected to be able to hold at least 1024 according to [implimits]. |
| 1711 | /// However as this limit is somewhat easy to hit with template |
| 1712 | /// metaprogramming we'd prefer to keep it as large as possible. |
| 1713 | /// At the moment it has been left as a non-bitfield since this type |
| 1714 | /// safely fits in 64 bits as an unsigned, so there is no reason to |
| 1715 | /// introduce the performance impact of a bitfield. |
| 1716 | unsigned NumArgs; |
| 1717 | }; |
| 1718 | |
| 1719 | class SubstTemplateTypeParmPackTypeBitfields { |
| 1720 | friend class SubstTemplateTypeParmPackType; |
| 1721 | |
| 1722 | unsigned : NumTypeBits; |
| 1723 | |
| 1724 | /// The number of template arguments in \c Arguments, which is |
| 1725 | /// expected to be able to hold at least 1024 according to [implimits]. |
| 1726 | /// However as this limit is somewhat easy to hit with template |
| 1727 | /// metaprogramming we'd prefer to keep it as large as possible. |
| 1728 | /// At the moment it has been left as a non-bitfield since this type |
| 1729 | /// safely fits in 64 bits as an unsigned, so there is no reason to |
| 1730 | /// introduce the performance impact of a bitfield. |
| 1731 | unsigned NumArgs; |
| 1732 | }; |
| 1733 | |
| 1734 | class TemplateSpecializationTypeBitfields { |
| 1735 | friend class TemplateSpecializationType; |
| 1736 | |
| 1737 | unsigned : NumTypeBits; |
| 1738 | |
| 1739 | /// Whether this template specialization type is a substituted type alias. |
| 1740 | unsigned TypeAlias : 1; |
| 1741 | |
| 1742 | /// The number of template arguments named in this class template |
| 1743 | /// specialization, which is expected to be able to hold at least 1024 |
| 1744 | /// according to [implimits]. However, as this limit is somewhat easy to |
| 1745 | /// hit with template metaprogramming we'd prefer to keep it as large |
| 1746 | /// as possible. At the moment it has been left as a non-bitfield since |
| 1747 | /// this type safely fits in 64 bits as an unsigned, so there is no reason |
| 1748 | /// to introduce the performance impact of a bitfield. |
| 1749 | unsigned NumArgs; |
| 1750 | }; |
| 1751 | |
| 1752 | class DependentTemplateSpecializationTypeBitfields { |
| 1753 | friend class DependentTemplateSpecializationType; |
| 1754 | |
| 1755 | unsigned : NumTypeBits; |
| 1756 | unsigned : NumTypeWithKeywordBits; |
| 1757 | |
| 1758 | /// The number of template arguments named in this class template |
| 1759 | /// specialization, which is expected to be able to hold at least 1024 |
| 1760 | /// according to [implimits]. However, as this limit is somewhat easy to |
| 1761 | /// hit with template metaprogramming we'd prefer to keep it as large |
| 1762 | /// as possible. At the moment it has been left as a non-bitfield since |
| 1763 | /// this type safely fits in 64 bits as an unsigned, so there is no reason |
| 1764 | /// to introduce the performance impact of a bitfield. |
| 1765 | unsigned NumArgs; |
| 1766 | }; |
| 1767 | |
| 1768 | class PackExpansionTypeBitfields { |
| 1769 | friend class PackExpansionType; |
| 1770 | |
| 1771 | unsigned : NumTypeBits; |
| 1772 | |
| 1773 | /// The number of expansions that this pack expansion will |
| 1774 | /// generate when substituted (+1), which is expected to be able to |
| 1775 | /// hold at least 1024 according to [implimits]. However, as this limit |
| 1776 | /// is somewhat easy to hit with template metaprogramming we'd prefer to |
| 1777 | /// keep it as large as possible. At the moment it has been left as a |
| 1778 | /// non-bitfield since this type safely fits in 64 bits as an unsigned, so |
| 1779 | /// there is no reason to introduce the performance impact of a bitfield. |
| 1780 | /// |
| 1781 | /// This field will only have a non-zero value when some of the parameter |
| 1782 | /// packs that occur within the pattern have been substituted but others |
| 1783 | /// have not. |
| 1784 | unsigned NumExpansions; |
| 1785 | }; |
| 1786 | |
| 1787 | union { |
| 1788 | TypeBitfields TypeBits; |
| 1789 | ArrayTypeBitfields ArrayTypeBits; |
| 1790 | ConstantArrayTypeBitfields ConstantArrayTypeBits; |
| 1791 | AttributedTypeBitfields AttributedTypeBits; |
| 1792 | AutoTypeBitfields AutoTypeBits; |
| 1793 | BuiltinTypeBitfields BuiltinTypeBits; |
| 1794 | FunctionTypeBitfields FunctionTypeBits; |
| 1795 | ObjCObjectTypeBitfields ObjCObjectTypeBits; |
| 1796 | ReferenceTypeBitfields ReferenceTypeBits; |
| 1797 | TypeWithKeywordBitfields TypeWithKeywordBits; |
| 1798 | ElaboratedTypeBitfields ElaboratedTypeBits; |
| 1799 | VectorTypeBitfields VectorTypeBits; |
| 1800 | SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits; |
| 1801 | TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits; |
| 1802 | DependentTemplateSpecializationTypeBitfields |
| 1803 | DependentTemplateSpecializationTypeBits; |
| 1804 | PackExpansionTypeBitfields PackExpansionTypeBits; |
| 1805 | }; |
| 1806 | |
| 1807 | private: |
| 1808 | template <class T> friend class TypePropertyCache; |
| 1809 | |
| 1810 | /// Set whether this type comes from an AST file. |
| 1811 | void setFromAST(bool V = true) const { |
| 1812 | TypeBits.FromAST = V; |
| 1813 | } |
| 1814 | |
| 1815 | protected: |
| 1816 | friend class ASTContext; |
| 1817 | |
| 1818 | Type(TypeClass tc, QualType canon, TypeDependence Dependence) |
| 1819 | : ExtQualsTypeCommonBase(this, |
| 1820 | canon.isNull() ? QualType(this_(), 0) : canon) { |
| 1821 | static_assert(sizeof(*this) <= 8 + sizeof(ExtQualsTypeCommonBase), |
| 1822 | "changing bitfields changed sizeof(Type)!"); |
| 1823 | static_assert(alignof(decltype(*this)) % sizeof(void *) == 0, |
| 1824 | "Insufficient alignment!"); |
| 1825 | TypeBits.TC = tc; |
| 1826 | TypeBits.Dependence = static_cast<unsigned>(Dependence); |
| 1827 | TypeBits.CacheValid = false; |
| 1828 | TypeBits.CachedLocalOrUnnamed = false; |
| 1829 | TypeBits.CachedLinkage = NoLinkage; |
| 1830 | TypeBits.FromAST = false; |
| 1831 | } |
| 1832 | |
| 1833 | // silence VC++ warning C4355: 'this' : used in base member initializer list |
| 1834 | Type *this_() { return this; } |
| 1835 | |
| 1836 | void setDependence(TypeDependence D) { |
| 1837 | TypeBits.Dependence = static_cast<unsigned>(D); |
| 1838 | } |
| 1839 | |
| 1840 | void addDependence(TypeDependence D) { setDependence(getDependence() | D); } |
| 1841 | |
| 1842 | public: |
| 1843 | friend class ASTReader; |
| 1844 | friend class ASTWriter; |
| 1845 | template <class T> friend class serialization::AbstractTypeReader; |
| 1846 | template <class T> friend class serialization::AbstractTypeWriter; |
| 1847 | |
| 1848 | Type(const Type &) = delete; |
| 1849 | Type(Type &&) = delete; |
| 1850 | Type &operator=(const Type &) = delete; |
| 1851 | Type &operator=(Type &&) = delete; |
| 1852 | |
| 1853 | TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } |
| 1854 | |
| 1855 | /// Whether this type comes from an AST file. |
| 1856 | bool isFromAST() const { return TypeBits.FromAST; } |
| 1857 | |
| 1858 | /// Whether this type is or contains an unexpanded parameter |
| 1859 | /// pack, used to support C++0x variadic templates. |
| 1860 | /// |
| 1861 | /// A type that contains a parameter pack shall be expanded by the |
| 1862 | /// ellipsis operator at some point. For example, the typedef in the |
| 1863 | /// following example contains an unexpanded parameter pack 'T': |
| 1864 | /// |
| 1865 | /// \code |
| 1866 | /// template<typename ...T> |
| 1867 | /// struct X { |
| 1868 | /// typedef T* pointer_types; // ill-formed; T is a parameter pack. |
| 1869 | /// }; |
| 1870 | /// \endcode |
| 1871 | /// |
| 1872 | /// Note that this routine does not specify which |
| 1873 | bool containsUnexpandedParameterPack() const { |
| 1874 | return getDependence() & TypeDependence::UnexpandedPack; |
| 1875 | } |
| 1876 | |
| 1877 | /// Determines if this type would be canonical if it had no further |
| 1878 | /// qualification. |
| 1879 | bool isCanonicalUnqualified() const { |
| 1880 | return CanonicalType == QualType(this, 0); |
| 1881 | } |
| 1882 | |
| 1883 | /// Pull a single level of sugar off of this locally-unqualified type. |
| 1884 | /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() |
| 1885 | /// or QualType::getSingleStepDesugaredType(const ASTContext&). |
| 1886 | QualType getLocallyUnqualifiedSingleStepDesugaredType() const; |
| 1887 | |
| 1888 | /// As an extension, we classify types as one of "sized" or "sizeless"; |
| 1889 | /// every type is one or the other. Standard types are all sized; |
| 1890 | /// sizeless types are purely an extension. |
| 1891 | /// |
| 1892 | /// Sizeless types contain data with no specified size, alignment, |
| 1893 | /// or layout. |
| 1894 | bool isSizelessType() const; |
| 1895 | bool isSizelessBuiltinType() const; |
| 1896 | |
| 1897 | /// Determines if this is a sizeless type supported by the |
| 1898 | /// 'arm_sve_vector_bits' type attribute, which can be applied to a single |
| 1899 | /// SVE vector or predicate, excluding tuple types such as svint32x4_t. |
| 1900 | bool isVLSTBuiltinType() const; |
| 1901 | |
| 1902 | /// Returns the representative type for the element of an SVE builtin type. |
| 1903 | /// This is used to represent fixed-length SVE vectors created with the |
| 1904 | /// 'arm_sve_vector_bits' type attribute as VectorType. |
| 1905 | QualType getSveEltType(const ASTContext &Ctx) const; |
| 1906 | |
| 1907 | /// Types are partitioned into 3 broad categories (C99 6.2.5p1): |
| 1908 | /// object types, function types, and incomplete types. |
| 1909 | |
| 1910 | /// Return true if this is an incomplete type. |
| 1911 | /// A type that can describe objects, but which lacks information needed to |
| 1912 | /// determine its size (e.g. void, or a fwd declared struct). Clients of this |
| 1913 | /// routine will need to determine if the size is actually required. |
| 1914 | /// |
| 1915 | /// Def If non-null, and the type refers to some kind of declaration |
| 1916 | /// that can be completed (such as a C struct, C++ class, or Objective-C |
| 1917 | /// class), will be set to the declaration. |
| 1918 | bool isIncompleteType(NamedDecl **Def = nullptr) const; |
| 1919 | |
| 1920 | /// Return true if this is an incomplete or object |
| 1921 | /// type, in other words, not a function type. |
| 1922 | bool isIncompleteOrObjectType() const { |
| 1923 | return !isFunctionType(); |
| 1924 | } |
| 1925 | |
| 1926 | /// Determine whether this type is an object type. |
| 1927 | bool isObjectType() const { |
| 1928 | // C++ [basic.types]p8: |
| 1929 | // An object type is a (possibly cv-qualified) type that is not a |
| 1930 | // function type, not a reference type, and not a void type. |
| 1931 | return !isReferenceType() && !isFunctionType() && !isVoidType(); |
| 1932 | } |
| 1933 | |
| 1934 | /// Return true if this is a literal type |
| 1935 | /// (C++11 [basic.types]p10) |
| 1936 | bool isLiteralType(const ASTContext &Ctx) const; |
| 1937 | |
| 1938 | /// Determine if this type is a structural type, per C++20 [temp.param]p7. |
| 1939 | bool isStructuralType() const; |
| 1940 | |
| 1941 | /// Test if this type is a standard-layout type. |
| 1942 | /// (C++0x [basic.type]p9) |
| 1943 | bool isStandardLayoutType() const; |
| 1944 | |
| 1945 | /// Helper methods to distinguish type categories. All type predicates |
| 1946 | /// operate on the canonical type, ignoring typedefs and qualifiers. |
| 1947 | |
| 1948 | /// Returns true if the type is a builtin type. |
| 1949 | bool isBuiltinType() const; |
| 1950 | |
| 1951 | /// Test for a particular builtin type. |
| 1952 | bool isSpecificBuiltinType(unsigned K) const; |
| 1953 | |
| 1954 | /// Test for a type which does not represent an actual type-system type but |
| 1955 | /// is instead used as a placeholder for various convenient purposes within |
| 1956 | /// Clang. All such types are BuiltinTypes. |
| 1957 | bool isPlaceholderType() const; |
| 1958 | const BuiltinType *getAsPlaceholderType() const; |
| 1959 | |
| 1960 | /// Test for a specific placeholder type. |
| 1961 | bool isSpecificPlaceholderType(unsigned K) const; |
| 1962 | |
| 1963 | /// Test for a placeholder type other than Overload; see |
| 1964 | /// BuiltinType::isNonOverloadPlaceholderType. |
| 1965 | bool isNonOverloadPlaceholderType() const; |
| 1966 | |
| 1967 | /// isIntegerType() does *not* include complex integers (a GCC extension). |
| 1968 | /// isComplexIntegerType() can be used to test for complex integers. |
| 1969 | bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) |
| 1970 | bool isEnumeralType() const; |
| 1971 | |
| 1972 | /// Determine whether this type is a scoped enumeration type. |
| 1973 | bool isScopedEnumeralType() const; |
| 1974 | bool isBooleanType() const; |
| 1975 | bool isCharType() const; |
| 1976 | bool isWideCharType() const; |
| 1977 | bool isChar8Type() const; |
| 1978 | bool isChar16Type() const; |
| 1979 | bool isChar32Type() const; |
| 1980 | bool isAnyCharacterType() const; |
| 1981 | bool isIntegralType(const ASTContext &Ctx) const; |
| 1982 | |
| 1983 | /// Determine whether this type is an integral or enumeration type. |
| 1984 | bool isIntegralOrEnumerationType() const; |
| 1985 | |
| 1986 | /// Determine whether this type is an integral or unscoped enumeration type. |
| 1987 | bool isIntegralOrUnscopedEnumerationType() const; |
| 1988 | bool isUnscopedEnumerationType() const; |
| 1989 | |
| 1990 | /// Floating point categories. |
| 1991 | bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) |
| 1992 | /// isComplexType() does *not* include complex integers (a GCC extension). |
| 1993 | /// isComplexIntegerType() can be used to test for complex integers. |
| 1994 | bool isComplexType() const; // C99 6.2.5p11 (complex) |
| 1995 | bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. |
| 1996 | bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) |
| 1997 | bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) |
| 1998 | bool isFloat16Type() const; // C11 extension ISO/IEC TS 18661 |
| 1999 | bool isBFloat16Type() const; |
| 2000 | bool isFloat128Type() const; |
| 2001 | bool isRealType() const; // C99 6.2.5p17 (real floating + integer) |
| 2002 | bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) |
| 2003 | bool isVoidType() const; // C99 6.2.5p19 |
| 2004 | bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) |
| 2005 | bool isAggregateType() const; |
| 2006 | bool isFundamentalType() const; |
| 2007 | bool isCompoundType() const; |
| 2008 | |
| 2009 | // Type Predicates: Check to see if this type is structurally the specified |
| 2010 | // type, ignoring typedefs and qualifiers. |
| 2011 | bool isFunctionType() const; |
| 2012 | bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } |
| 2013 | bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } |
| 2014 | bool isPointerType() const; |
| 2015 | bool isAnyPointerType() const; // Any C pointer or ObjC object pointer |
| 2016 | bool isBlockPointerType() const; |
| 2017 | bool isVoidPointerType() const; |
| 2018 | bool isReferenceType() const; |
| 2019 | bool isLValueReferenceType() const; |
| 2020 | bool isRValueReferenceType() const; |
| 2021 | bool isObjectPointerType() const; |
| 2022 | bool isFunctionPointerType() const; |
| 2023 | bool isFunctionReferenceType() const; |
| 2024 | bool isMemberPointerType() const; |
| 2025 | bool isMemberFunctionPointerType() const; |
| 2026 | bool isMemberDataPointerType() const; |
| 2027 | bool isArrayType() const; |
| 2028 | bool isConstantArrayType() const; |
| 2029 | bool isIncompleteArrayType() const; |
| 2030 | bool isVariableArrayType() const; |
| 2031 | bool isDependentSizedArrayType() const; |
| 2032 | bool isRecordType() const; |
| 2033 | bool isClassType() const; |
| 2034 | bool isStructureType() const; |
| 2035 | bool isObjCBoxableRecordType() const; |
| 2036 | bool isInterfaceType() const; |
| 2037 | bool isStructureOrClassType() const; |
| 2038 | bool isUnionType() const; |
| 2039 | bool isComplexIntegerType() const; // GCC _Complex integer type. |
| 2040 | bool isVectorType() const; // GCC vector type. |
| 2041 | bool isExtVectorType() const; // Extended vector type. |
| 2042 | bool isMatrixType() const; // Matrix type. |
| 2043 | bool isConstantMatrixType() const; // Constant matrix type. |
| 2044 | bool isDependentAddressSpaceType() const; // value-dependent address space qualifier |
| 2045 | bool isObjCObjectPointerType() const; // pointer to ObjC object |
| 2046 | bool isObjCRetainableType() const; // ObjC object or block pointer |
| 2047 | bool isObjCLifetimeType() const; // (array of)* retainable type |
| 2048 | bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type |
| 2049 | bool isObjCNSObjectType() const; // __attribute__((NSObject)) |
| 2050 | bool isObjCIndependentClassType() const; // __attribute__((objc_independent_class)) |
| 2051 | // FIXME: change this to 'raw' interface type, so we can used 'interface' type |
| 2052 | // for the common case. |
| 2053 | bool isObjCObjectType() const; // NSString or typeof(*(id)0) |
| 2054 | bool isObjCQualifiedInterfaceType() const; // NSString<foo> |
| 2055 | bool isObjCQualifiedIdType() const; // id<foo> |
| 2056 | bool isObjCQualifiedClassType() const; // Class<foo> |
| 2057 | bool isObjCObjectOrInterfaceType() const; |
| 2058 | bool isObjCIdType() const; // id |
| 2059 | bool isDecltypeType() const; |
| 2060 | /// Was this type written with the special inert-in-ARC __unsafe_unretained |
| 2061 | /// qualifier? |
| 2062 | /// |
| 2063 | /// This approximates the answer to the following question: if this |
| 2064 | /// translation unit were compiled in ARC, would this type be qualified |
| 2065 | /// with __unsafe_unretained? |
| 2066 | bool isObjCInertUnsafeUnretainedType() const { |
| 2067 | return hasAttr(attr::ObjCInertUnsafeUnretained); |
| 2068 | } |
| 2069 | |
| 2070 | /// Whether the type is Objective-C 'id' or a __kindof type of an |
| 2071 | /// object type, e.g., __kindof NSView * or __kindof id |
| 2072 | /// <NSCopying>. |
| 2073 | /// |
| 2074 | /// \param bound Will be set to the bound on non-id subtype types, |
| 2075 | /// which will be (possibly specialized) Objective-C class type, or |
| 2076 | /// null for 'id. |
| 2077 | bool isObjCIdOrObjectKindOfType(const ASTContext &ctx, |
| 2078 | const ObjCObjectType *&bound) const; |
| 2079 | |
| 2080 | bool isObjCClassType() const; // Class |
| 2081 | |
| 2082 | /// Whether the type is Objective-C 'Class' or a __kindof type of an |
| 2083 | /// Class type, e.g., __kindof Class <NSCopying>. |
| 2084 | /// |
| 2085 | /// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound |
| 2086 | /// here because Objective-C's type system cannot express "a class |
| 2087 | /// object for a subclass of NSFoo". |
| 2088 | bool isObjCClassOrClassKindOfType() const; |
| 2089 | |
| 2090 | bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const; |
| 2091 | bool isObjCSelType() const; // Class |
| 2092 | bool isObjCBuiltinType() const; // 'id' or 'Class' |
| 2093 | bool isObjCARCBridgableType() const; |
| 2094 | bool isCARCBridgableType() const; |
| 2095 | bool isTemplateTypeParmType() const; // C++ template type parameter |
| 2096 | bool isNullPtrType() const; // C++11 std::nullptr_t |
| 2097 | bool isNothrowT() const; // C++ std::nothrow_t |
| 2098 | bool isAlignValT() const; // C++17 std::align_val_t |
| 2099 | bool isStdByteType() const; // C++17 std::byte |
| 2100 | bool isAtomicType() const; // C11 _Atomic() |
| 2101 | bool isUndeducedAutoType() const; // C++11 auto or |
| 2102 | // C++14 decltype(auto) |
| 2103 | bool isTypedefNameType() const; // typedef or alias template |
| 2104 | |
| 2105 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ |
| 2106 | bool is##Id##Type() const; |
| 2107 | #include "clang/Basic/OpenCLImageTypes.def" |
| 2108 | |
| 2109 | bool isImageType() const; // Any OpenCL image type |
| 2110 | |
| 2111 | bool isSamplerT() const; // OpenCL sampler_t |
| 2112 | bool isEventT() const; // OpenCL event_t |
| 2113 | bool isClkEventT() const; // OpenCL clk_event_t |
| 2114 | bool isQueueT() const; // OpenCL queue_t |
| 2115 | bool isReserveIDT() const; // OpenCL reserve_id_t |
| 2116 | |
| 2117 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ |
| 2118 | bool is##Id##Type() const; |
| 2119 | #include "clang/Basic/OpenCLExtensionTypes.def" |
| 2120 | // Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension |
| 2121 | bool isOCLIntelSubgroupAVCType() const; |
| 2122 | bool isOCLExtOpaqueType() const; // Any OpenCL extension type |
| 2123 | |
| 2124 | bool isPipeType() const; // OpenCL pipe type |
| 2125 | bool isExtIntType() const; // Extended Int Type |
| 2126 | bool isOpenCLSpecificType() const; // Any OpenCL specific type |
| 2127 | |
| 2128 | /// Determines if this type, which must satisfy |
| 2129 | /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather |
| 2130 | /// than implicitly __strong. |
| 2131 | bool isObjCARCImplicitlyUnretainedType() const; |
| 2132 | |
| 2133 | /// Check if the type is the CUDA device builtin surface type. |
| 2134 | bool isCUDADeviceBuiltinSurfaceType() const; |
| 2135 | /// Check if the type is the CUDA device builtin texture type. |
| 2136 | bool isCUDADeviceBuiltinTextureType() const; |
| 2137 | |
| 2138 | /// Return the implicit lifetime for this type, which must not be dependent. |
| 2139 | Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; |
| 2140 | |
| 2141 | enum ScalarTypeKind { |
| 2142 | STK_CPointer, |
| 2143 | STK_BlockPointer, |
| 2144 | STK_ObjCObjectPointer, |
| 2145 | STK_MemberPointer, |
| 2146 | STK_Bool, |
| 2147 | STK_Integral, |
| 2148 | STK_Floating, |
| 2149 | STK_IntegralComplex, |
| 2150 | STK_FloatingComplex, |
| 2151 | STK_FixedPoint |
| 2152 | }; |
| 2153 | |
| 2154 | /// Given that this is a scalar type, classify it. |
| 2155 | ScalarTypeKind getScalarTypeKind() const; |
| 2156 | |
| 2157 | TypeDependence getDependence() const { |
| 2158 | return static_cast<TypeDependence>(TypeBits.Dependence); |
| 2159 | } |
| 2160 | |
| 2161 | /// Whether this type is an error type. |
| 2162 | bool containsErrors() const { |
| 2163 | return getDependence() & TypeDependence::Error; |
| 2164 | } |
| 2165 | |
| 2166 | /// Whether this type is a dependent type, meaning that its definition |
| 2167 | /// somehow depends on a template parameter (C++ [temp.dep.type]). |
| 2168 | bool isDependentType() const { |
| 2169 | return getDependence() & TypeDependence::Dependent; |
| 2170 | } |
| 2171 | |
| 2172 | /// Determine whether this type is an instantiation-dependent type, |
| 2173 | /// meaning that the type involves a template parameter (even if the |
| 2174 | /// definition does not actually depend on the type substituted for that |
| 2175 | /// template parameter). |
| 2176 | bool isInstantiationDependentType() const { |
| 2177 | return getDependence() & TypeDependence::Instantiation; |
| 2178 | } |
| 2179 | |
| 2180 | /// Determine whether this type is an undeduced type, meaning that |
| 2181 | /// it somehow involves a C++11 'auto' type or similar which has not yet been |
| 2182 | /// deduced. |
| 2183 | bool isUndeducedType() const; |
| 2184 | |
| 2185 | /// Whether this type is a variably-modified type (C99 6.7.5). |
| 2186 | bool isVariablyModifiedType() const { |
| 2187 | return getDependence() & TypeDependence::VariablyModified; |
| 2188 | } |
| 2189 | |
| 2190 | /// Whether this type involves a variable-length array type |
| 2191 | /// with a definite size. |
| 2192 | bool hasSizedVLAType() const; |
| 2193 | |
| 2194 | /// Whether this type is or contains a local or unnamed type. |
| 2195 | bool hasUnnamedOrLocalType() const; |
| 2196 | |
| 2197 | bool isOverloadableType() const; |
| 2198 | |
| 2199 | /// Determine wither this type is a C++ elaborated-type-specifier. |
| 2200 | bool isElaboratedTypeSpecifier() const; |
| 2201 | |
| 2202 | bool canDecayToPointerType() const; |
| 2203 | |
| 2204 | /// Whether this type is represented natively as a pointer. This includes |
| 2205 | /// pointers, references, block pointers, and Objective-C interface, |
| 2206 | /// qualified id, and qualified interface types, as well as nullptr_t. |
| 2207 | bool hasPointerRepresentation() const; |
| 2208 | |
| 2209 | /// Whether this type can represent an objective pointer type for the |
| 2210 | /// purpose of GC'ability |
| 2211 | bool hasObjCPointerRepresentation() const; |
| 2212 | |
| 2213 | /// Determine whether this type has an integer representation |
| 2214 | /// of some sort, e.g., it is an integer type or a vector. |
| 2215 | bool hasIntegerRepresentation() const; |
| 2216 | |
| 2217 | /// Determine whether this type has an signed integer representation |
| 2218 | /// of some sort, e.g., it is an signed integer type or a vector. |
| 2219 | bool hasSignedIntegerRepresentation() const; |
| 2220 | |
| 2221 | /// Determine whether this type has an unsigned integer representation |
| 2222 | /// of some sort, e.g., it is an unsigned integer type or a vector. |
| 2223 | bool hasUnsignedIntegerRepresentation() const; |
| 2224 | |
| 2225 | /// Determine whether this type has a floating-point representation |
| 2226 | /// of some sort, e.g., it is a floating-point type or a vector thereof. |
| 2227 | bool hasFloatingRepresentation() const; |
| 2228 | |
| 2229 | // Type Checking Functions: Check to see if this type is structurally the |
| 2230 | // specified type, ignoring typedefs and qualifiers, and return a pointer to |
| 2231 | // the best type we can. |
| 2232 | const RecordType *getAsStructureType() const; |
| 2233 | /// NOTE: getAs*ArrayType are methods on ASTContext. |
| 2234 | const RecordType *getAsUnionType() const; |
| 2235 | const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. |
| 2236 | const ObjCObjectType *getAsObjCInterfaceType() const; |
| 2237 | |
| 2238 | // The following is a convenience method that returns an ObjCObjectPointerType |
| 2239 | // for object declared using an interface. |
| 2240 | const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; |
| 2241 | const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; |
| 2242 | const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; |
| 2243 | const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; |
| 2244 | |
| 2245 | /// Retrieves the CXXRecordDecl that this type refers to, either |
| 2246 | /// because the type is a RecordType or because it is the injected-class-name |
| 2247 | /// type of a class template or class template partial specialization. |
| 2248 | CXXRecordDecl *getAsCXXRecordDecl() const; |
| 2249 | |
| 2250 | /// Retrieves the RecordDecl this type refers to. |
| 2251 | RecordDecl *getAsRecordDecl() const; |
| 2252 | |
| 2253 | /// Retrieves the TagDecl that this type refers to, either |
| 2254 | /// because the type is a TagType or because it is the injected-class-name |
| 2255 | /// type of a class template or class template partial specialization. |
| 2256 | TagDecl *getAsTagDecl() const; |
| 2257 | |
| 2258 | /// If this is a pointer or reference to a RecordType, return the |
| 2259 | /// CXXRecordDecl that the type refers to. |
| 2260 | /// |
| 2261 | /// If this is not a pointer or reference, or the type being pointed to does |
| 2262 | /// not refer to a CXXRecordDecl, returns NULL. |
| 2263 | const CXXRecordDecl *getPointeeCXXRecordDecl() const; |
| 2264 | |
| 2265 | /// Get the DeducedType whose type will be deduced for a variable with |
| 2266 | /// an initializer of this type. This looks through declarators like pointer |
| 2267 | /// types, but not through decltype or typedefs. |
| 2268 | DeducedType *getContainedDeducedType() const; |
| 2269 | |
| 2270 | /// Get the AutoType whose type will be deduced for a variable with |
| 2271 | /// an initializer of this type. This looks through declarators like pointer |
| 2272 | /// types, but not through decltype or typedefs. |
| 2273 | AutoType *getContainedAutoType() const { |
| 2274 | return dyn_cast_or_null<AutoType>(getContainedDeducedType()); |
| 2275 | } |
| 2276 | |
| 2277 | /// Determine whether this type was written with a leading 'auto' |
| 2278 | /// corresponding to a trailing return type (possibly for a nested |
| 2279 | /// function type within a pointer to function type or similar). |
| 2280 | bool hasAutoForTrailingReturnType() const; |
| 2281 | |
| 2282 | /// Member-template getAs<specific type>'. Look through sugar for |
| 2283 | /// an instance of \<specific type>. This scheme will eventually |
| 2284 | /// replace the specific getAsXXXX methods above. |
| 2285 | /// |
| 2286 | /// There are some specializations of this member template listed |
| 2287 | /// immediately following this class. |
| 2288 | template <typename T> const T *getAs() const; |
| 2289 | |
| 2290 | /// Member-template getAsAdjusted<specific type>. Look through specific kinds |
| 2291 | /// of sugar (parens, attributes, etc) for an instance of \<specific type>. |
| 2292 | /// This is used when you need to walk over sugar nodes that represent some |
| 2293 | /// kind of type adjustment from a type that was written as a \<specific type> |
| 2294 | /// to another type that is still canonically a \<specific type>. |
| 2295 | template <typename T> const T *getAsAdjusted() const; |
| 2296 | |
| 2297 | /// A variant of getAs<> for array types which silently discards |
| 2298 | /// qualifiers from the outermost type. |
| 2299 | const ArrayType *getAsArrayTypeUnsafe() const; |
| 2300 | |
| 2301 | /// Member-template castAs<specific type>. Look through sugar for |
| 2302 | /// the underlying instance of \<specific type>. |
| 2303 | /// |
| 2304 | /// This method has the same relationship to getAs<T> as cast<T> has |
| 2305 | /// to dyn_cast<T>; which is to say, the underlying type *must* |
| 2306 | /// have the intended type, and this method will never return null. |
| 2307 | template <typename T> const T *castAs() const; |
| 2308 | |
| 2309 | /// A variant of castAs<> for array type which silently discards |
| 2310 | /// qualifiers from the outermost type. |
| 2311 | const ArrayType *castAsArrayTypeUnsafe() const; |
| 2312 | |
| 2313 | /// Determine whether this type had the specified attribute applied to it |
| 2314 | /// (looking through top-level type sugar). |
| 2315 | bool hasAttr(attr::Kind AK) const; |
| 2316 | |
| 2317 | /// Get the base element type of this type, potentially discarding type |
| 2318 | /// qualifiers. This should never be used when type qualifiers |
| 2319 | /// are meaningful. |
| 2320 | const Type *getBaseElementTypeUnsafe() const; |
| 2321 | |
| 2322 | /// If this is an array type, return the element type of the array, |
| 2323 | /// potentially with type qualifiers missing. |
| 2324 | /// This should never be used when type qualifiers are meaningful. |
| 2325 | const Type *getArrayElementTypeNoTypeQual() const; |
| 2326 | |
| 2327 | /// If this is a pointer type, return the pointee type. |
| 2328 | /// If this is an array type, return the array element type. |
| 2329 | /// This should never be used when type qualifiers are meaningful. |
| 2330 | const Type *getPointeeOrArrayElementType() const; |
| 2331 | |
| 2332 | /// If this is a pointer, ObjC object pointer, or block |
| 2333 | /// pointer, this returns the respective pointee. |
| 2334 | QualType getPointeeType() const; |
| 2335 | |
| 2336 | /// Return the specified type with any "sugar" removed from the type, |
| 2337 | /// removing any typedefs, typeofs, etc., as well as any qualifiers. |
| 2338 | const Type *getUnqualifiedDesugaredType() const; |
| 2339 | |
| 2340 | /// More type predicates useful for type checking/promotion |
| 2341 | bool isPromotableIntegerType() const; // C99 6.3.1.1p2 |
| 2342 | |
| 2343 | /// Return true if this is an integer type that is |
| 2344 | /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], |
| 2345 | /// or an enum decl which has a signed representation. |
| 2346 | bool isSignedIntegerType() const; |
| 2347 | |
| 2348 | /// Return true if this is an integer type that is |
| 2349 | /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], |
| 2350 | /// or an enum decl which has an unsigned representation. |
| 2351 | bool isUnsignedIntegerType() const; |
| 2352 | |
| 2353 | /// Determines whether this is an integer type that is signed or an |
| 2354 | /// enumeration types whose underlying type is a signed integer type. |
| 2355 | bool isSignedIntegerOrEnumerationType() const; |
| 2356 | |
| 2357 | /// Determines whether this is an integer type that is unsigned or an |
| 2358 | /// enumeration types whose underlying type is a unsigned integer type. |
| 2359 | bool isUnsignedIntegerOrEnumerationType() const; |
| 2360 | |
| 2361 | /// Return true if this is a fixed point type according to |
| 2362 | /// ISO/IEC JTC1 SC22 WG14 N1169. |
| 2363 | bool isFixedPointType() const; |
| 2364 | |
| 2365 | /// Return true if this is a fixed point or integer type. |
| 2366 | bool isFixedPointOrIntegerType() const; |
| 2367 | |
| 2368 | /// Return true if this is a saturated fixed point type according to |
| 2369 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. |
| 2370 | bool isSaturatedFixedPointType() const; |
| 2371 | |
| 2372 | /// Return true if this is a saturated fixed point type according to |
| 2373 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. |
| 2374 | bool isUnsaturatedFixedPointType() const; |
| 2375 | |
| 2376 | /// Return true if this is a fixed point type that is signed according |
| 2377 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. |
| 2378 | bool isSignedFixedPointType() const; |
| 2379 | |
| 2380 | /// Return true if this is a fixed point type that is unsigned according |
| 2381 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. |
| 2382 | bool isUnsignedFixedPointType() const; |
| 2383 | |
| 2384 | /// Return true if this is not a variable sized type, |
| 2385 | /// according to the rules of C99 6.7.5p3. It is not legal to call this on |
| 2386 | /// incomplete types. |
| 2387 | bool isConstantSizeType() const; |
| 2388 | |
| 2389 | /// Returns true if this type can be represented by some |
| 2390 | /// set of type specifiers. |
| 2391 | bool isSpecifierType() const; |
| 2392 | |
| 2393 | /// Determine the linkage of this type. |
| 2394 | Linkage getLinkage() const; |
| 2395 | |
| 2396 | /// Determine the visibility of this type. |
| 2397 | Visibility getVisibility() const { |
| 2398 | return getLinkageAndVisibility().getVisibility(); |
| 2399 | } |
| 2400 | |
| 2401 | /// Return true if the visibility was explicitly set is the code. |
| 2402 | bool isVisibilityExplicit() const { |
| 2403 | return getLinkageAndVisibility().isVisibilityExplicit(); |
| 2404 | } |
| 2405 | |
| 2406 | /// Determine the linkage and visibility of this type. |
| 2407 | LinkageInfo getLinkageAndVisibility() const; |
| 2408 | |
| 2409 | /// True if the computed linkage is valid. Used for consistency |
| 2410 | /// checking. Should always return true. |
| 2411 | bool isLinkageValid() const; |
| 2412 | |
| 2413 | /// Determine the nullability of the given type. |
| 2414 | /// |
| 2415 | /// Note that nullability is only captured as sugar within the type |
| 2416 | /// system, not as part of the canonical type, so nullability will |
| 2417 | /// be lost by canonicalization and desugaring. |
| 2418 | Optional<NullabilityKind> getNullability(const ASTContext &context) const; |
| 2419 | |
| 2420 | /// Determine whether the given type can have a nullability |
| 2421 | /// specifier applied to it, i.e., if it is any kind of pointer type. |
| 2422 | /// |
| 2423 | /// \param ResultIfUnknown The value to return if we don't yet know whether |
| 2424 | /// this type can have nullability because it is dependent. |
| 2425 | bool canHaveNullability(bool ResultIfUnknown = true) const; |
| 2426 | |
| 2427 | /// Retrieve the set of substitutions required when accessing a member |
| 2428 | /// of the Objective-C receiver type that is declared in the given context. |
| 2429 | /// |
| 2430 | /// \c *this is the type of the object we're operating on, e.g., the |
| 2431 | /// receiver for a message send or the base of a property access, and is |
| 2432 | /// expected to be of some object or object pointer type. |
| 2433 | /// |
| 2434 | /// \param dc The declaration context for which we are building up a |
| 2435 | /// substitution mapping, which should be an Objective-C class, extension, |
| 2436 | /// category, or method within. |
| 2437 | /// |
| 2438 | /// \returns an array of type arguments that can be substituted for |
| 2439 | /// the type parameters of the given declaration context in any type described |
| 2440 | /// within that context, or an empty optional to indicate that no |
| 2441 | /// substitution is required. |
| 2442 | Optional<ArrayRef<QualType>> |
| 2443 | getObjCSubstitutions(const DeclContext *dc) const; |
| 2444 | |
| 2445 | /// Determines if this is an ObjC interface type that may accept type |
| 2446 | /// parameters. |
| 2447 | bool acceptsObjCTypeParams() const; |
| 2448 | |
| 2449 | const char *getTypeClassName() const; |
| 2450 | |
| 2451 | QualType getCanonicalTypeInternal() const { |
| 2452 | return CanonicalType; |
| 2453 | } |
| 2454 | |
| 2455 | CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h |
| 2456 | void dump() const; |
| 2457 | void dump(llvm::raw_ostream &OS, const ASTContext &Context) const; |
| 2458 | }; |
| 2459 | |
| 2460 | /// This will check for a TypedefType by removing any existing sugar |
| 2461 | /// until it reaches a TypedefType or a non-sugared type. |
| 2462 | template <> const TypedefType *Type::getAs() const; |
| 2463 | |
| 2464 | /// This will check for a TemplateSpecializationType by removing any |
| 2465 | /// existing sugar until it reaches a TemplateSpecializationType or a |
| 2466 | /// non-sugared type. |
| 2467 | template <> const TemplateSpecializationType *Type::getAs() const; |
| 2468 | |
| 2469 | /// This will check for an AttributedType by removing any existing sugar |
| 2470 | /// until it reaches an AttributedType or a non-sugared type. |
| 2471 | template <> const AttributedType *Type::getAs() const; |
| 2472 | |
| 2473 | // We can do canonical leaf types faster, because we don't have to |
| 2474 | // worry about preserving child type decoration. |
| 2475 | #define TYPE(Class, Base) |
| 2476 | #define LEAF_TYPE(Class) \ |
| 2477 | template <> inline const Class##Type *Type::getAs() const { \ |
| 2478 | return dyn_cast<Class##Type>(CanonicalType); \ |
| 2479 | } \ |
| 2480 | template <> inline const Class##Type *Type::castAs() const { \ |
| 2481 | return cast<Class##Type>(CanonicalType); \ |
| 2482 | } |
| 2483 | #include "clang/AST/TypeNodes.inc" |
| 2484 | |
| 2485 | /// This class is used for builtin types like 'int'. Builtin |
| 2486 | /// types are always canonical and have a literal name field. |
| 2487 | class BuiltinType : public Type { |
| 2488 | public: |
| 2489 | enum Kind { |
| 2490 | // OpenCL image types |
| 2491 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id, |
| 2492 | #include "clang/Basic/OpenCLImageTypes.def" |
| 2493 | // OpenCL extension types |
| 2494 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id, |
| 2495 | #include "clang/Basic/OpenCLExtensionTypes.def" |
| 2496 | // SVE Types |
| 2497 | #define SVE_TYPE(Name, Id, SingletonId) Id, |
| 2498 | #include "clang/Basic/AArch64SVEACLETypes.def" |
| 2499 | // PPC MMA Types |
| 2500 | #define PPC_VECTOR_TYPE(Name, Id, Size) Id, |
| 2501 | #include "clang/Basic/PPCTypes.def" |
| 2502 | // RVV Types |
| 2503 | #define RVV_TYPE(Name, Id, SingletonId) Id, |
| 2504 | #include "clang/Basic/RISCVVTypes.def" |
| 2505 | // All other builtin types |
| 2506 | #define BUILTIN_TYPE(Id, SingletonId) Id, |
| 2507 | #define LAST_BUILTIN_TYPE(Id) LastKind = Id |
| 2508 | #include "clang/AST/BuiltinTypes.def" |
| 2509 | }; |
| 2510 | |
| 2511 | private: |
| 2512 | friend class ASTContext; // ASTContext creates these. |
| 2513 | |
| 2514 | BuiltinType(Kind K) |
| 2515 | : Type(Builtin, QualType(), |
| 2516 | K == Dependent ? TypeDependence::DependentInstantiation |
| 2517 | : TypeDependence::None) { |
| 2518 | BuiltinTypeBits.Kind = K; |
| 2519 | } |
| 2520 | |
| 2521 | public: |
| 2522 | Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } |
| 2523 | StringRef getName(const PrintingPolicy &Policy) const; |
| 2524 | |
| 2525 | const char *getNameAsCString(const PrintingPolicy &Policy) const { |
| 2526 | // The StringRef is null-terminated. |
| 2527 | StringRef str = getName(Policy); |
| 2528 | assert(!str.empty() && str.data()[str.size()] == '\0')(static_cast <bool> (!str.empty() && str.data() [str.size()] == '\0') ? void (0) : __assert_fail ("!str.empty() && str.data()[str.size()] == '\\0'" , "/build/llvm-toolchain-snapshot-13~++20210722111111+b115c038d2d4/clang/include/clang/AST/Type.h" , 2528, __extension__ __PRETTY_FUNCTION__)); |
| 2529 | return str.data(); |
| 2530 | } |
| 2531 | |
| 2532 | bool isSugared() const { return false; } |
| 2533 | QualType desugar() const { return QualType(this, 0); } |
| 2534 | |
| 2535 | bool isInteger() const { |
| 2536 | return getKind() >= Bool && getKind() <= Int128; |
| 2537 | } |
| 2538 | |
| 2539 | bool isSignedInteger() const { |
| 2540 | return getKind() >= Char_S && getKind() <= Int128; |
| 2541 | } |
| 2542 | |
| 2543 | bool isUnsignedInteger() const { |
| 2544 | return getKind() >= Bool && getKind() <= UInt128; |
| 2545 | } |
| 2546 | |
| 2547 | bool isFloatingPoint() const { |
| 2548 | return getKind() >= Half && getKind() <= Float128; |
| 2549 | } |
| 2550 | |
| 2551 | /// Determines whether the given kind corresponds to a placeholder type. |
| 2552 | static bool isPlaceholderTypeKind(Kind K) { |
| 2553 | return K >= Overload; |
| 2554 | } |
| 2555 | |
| 2556 | /// Determines whether this type is a placeholder type, i.e. a type |
| 2557 | /// which cannot appear in arbitrary positions in a fully-formed |
| 2558 | /// expression. |
| 2559 | bool isPlaceholderType() const { |
| 2560 | return isPlaceholderTypeKind(getKind()); |
| 2561 | } |
| 2562 | |
| 2563 | /// Determines whether this type is a placeholder type other than |
| 2564 | /// Overload. Most placeholder types require only syntactic |
| 2565 | /// information about their context in order to be resolved (e.g. |
| 2566 | /// whether it is a call expression), which means they can (and |
| 2567 | /// should) be resolved in an earlier "phase" of analysis. |
| 2568 | /// Overload expressions sometimes pick up further information |
| 2569 | /// from their context, like whether the context expects a |
| 2570 | /// specific function-pointer type, and so frequently need |
| 2571 | /// special treatment. |
| 2572 | bool isNonOverloadPlaceholderType() const { |
| 2573 | return getKind() > Overload; |
| 2574 | } |
| 2575 | |
| 2576 | static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } |
| 2577 | }; |
| 2578 | |
| 2579 | /// Complex values, per C99 6.2.5p11. This supports the C99 complex |
| 2580 | /// types (_Complex float etc) as well as the GCC integer complex extensions. |
| 2581 | class ComplexType : public Type, public llvm::FoldingSetNode { |
| 2582 | friend class ASTContext; // ASTContext creates these. |
| 2583 | |
| 2584 | QualType ElementType; |
| 2585 | |
| 2586 | ComplexType(QualType Element, QualType CanonicalPtr) |
| 2587 | : Type(Complex, CanonicalPtr, Element->getDependence()), |
| 2588 | ElementType(Element) {} |
| 2589 | |
| 2590 | public: |
| 2591 | QualType getElementType() const { return ElementType; } |
| 2592 | |
| 2593 | bool isSugared() const { return false; } |
| 2594 | QualType desugar() const { return QualType(this, 0); } |
| 2595 | |
| 2596 | void Profile(llvm::FoldingSetNodeID &ID) { |
| 2597 | Profile(ID, getElementType()); |
| 2598 | } |
| 2599 | |
| 2600 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { |
| 2601 | ID.AddPointer(Element.getAsOpaquePtr()); |
| 2602 | } |
| 2603 | |
| 2604 | static bool classof(const Type *T) { return T->getTypeClass() == Complex; } |
| 2605 | }; |
| 2606 | |
| 2607 | /// Sugar for parentheses used when specifying types. |
| 2608 | class ParenType : public Type, public llvm::FoldingSetNode { |
| 2609 | friend class ASTContext; // ASTContext creates these. |
| 2610 | |
| 2611 | QualType Inner; |
| 2612 | |
| 2613 | ParenType(QualType InnerType, QualType CanonType) |
| 2614 | : Type(Paren, CanonType, InnerType->getDependence()), Inner(InnerType) {} |
| 2615 | |
| 2616 | public: |
| 2617 | QualType getInnerType() const { return Inner; } |
| 2618 | |
| 2619 | bool isSugared() const { return true; } |
| 2620 | QualType desugar() const { return getInnerType(); } |
| 2621 | |
| 2622 | void Profile(llvm::FoldingSetNodeID &ID) { |
| 2623 | Profile(ID, getInnerType()); |
| 2624 | } |
| 2625 | |
| 2626 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { |
| 2627 | Inner.Profile(ID); |
| 2628 | } |
| 2629 | |
| 2630 | static bool classof(const Type *T) { return T->getTypeClass() == Paren; } |
| 2631 | }; |
| 2632 | |
| 2633 | /// PointerType - C99 6.7.5.1 - Pointer Declarators. |
| 2634 | class PointerType : public Type, public llvm::FoldingSetNode { |
| 2635 | friend class ASTContext; // ASTContext creates these. |
| 2636 | |
| 2637 | QualType PointeeType; |
| 2638 | |
| 2639 | PointerType(QualType Pointee, QualType CanonicalPtr) |
| 2640 | : Type(Pointer, CanonicalPtr, Pointee->getDependence()), |
| 2641 | PointeeType(Pointee) {} |
| 2642 | |
| 2643 | public: |
| 2644 | QualType getPointeeType() const { return PointeeType; } |
| 2645 | |
| 2646 | bool isSugared() const { return false; } |
| 2647 | QualType desugar() const { return QualType(this, 0); } |
| 2648 | |
| 2649 | void Profile(llvm::FoldingSetNodeID &ID) { |
| 2650 | Profile(ID, getPointeeType()); |
| 2651 | } |
| 2652 | |
| 2653 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { |
| 2654 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
| 2655 | } |
| 2656 | |
| 2657 | static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } |
| 2658 | }; |
| 2659 | |
| 2660 | /// Represents a type which was implicitly adjusted by the semantic |
| 2661 | /// engine for arbitrary reasons. For example, array and function types can |
| 2662 | /// deca |