SemaType.cpp revision 198398
1//===--- SemaType.cpp - Semantic Analysis for Types -----------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements type-related semantic analysis. 11// 12//===----------------------------------------------------------------------===// 13 14#include "Sema.h" 15#include "clang/AST/ASTContext.h" 16#include "clang/AST/CXXInheritance.h" 17#include "clang/AST/DeclObjC.h" 18#include "clang/AST/DeclTemplate.h" 19#include "clang/AST/TypeLoc.h" 20#include "clang/AST/TypeLocVisitor.h" 21#include "clang/AST/Expr.h" 22#include "clang/Basic/PartialDiagnostic.h" 23#include "clang/Parse/DeclSpec.h" 24#include "llvm/ADT/SmallPtrSet.h" 25using namespace clang; 26 27/// \brief Perform adjustment on the parameter type of a function. 28/// 29/// This routine adjusts the given parameter type @p T to the actual 30/// parameter type used by semantic analysis (C99 6.7.5.3p[7,8], 31/// C++ [dcl.fct]p3). The adjusted parameter type is returned. 32QualType Sema::adjustParameterType(QualType T) { 33 // C99 6.7.5.3p7: 34 if (T->isArrayType()) { 35 // C99 6.7.5.3p7: 36 // A declaration of a parameter as "array of type" shall be 37 // adjusted to "qualified pointer to type", where the type 38 // qualifiers (if any) are those specified within the [ and ] of 39 // the array type derivation. 40 return Context.getArrayDecayedType(T); 41 } else if (T->isFunctionType()) 42 // C99 6.7.5.3p8: 43 // A declaration of a parameter as "function returning type" 44 // shall be adjusted to "pointer to function returning type", as 45 // in 6.3.2.1. 46 return Context.getPointerType(T); 47 48 return T; 49} 50 51/// \brief Convert the specified declspec to the appropriate type 52/// object. 53/// \param DS the declaration specifiers 54/// \param DeclLoc The location of the declarator identifier or invalid if none. 55/// \returns The type described by the declaration specifiers. This function 56/// never returns null. 57QualType Sema::ConvertDeclSpecToType(const DeclSpec &DS, 58 SourceLocation DeclLoc, 59 bool &isInvalid) { 60 // FIXME: Should move the logic from DeclSpec::Finish to here for validity 61 // checking. 62 QualType Result; 63 64 switch (DS.getTypeSpecType()) { 65 case DeclSpec::TST_void: 66 Result = Context.VoidTy; 67 break; 68 case DeclSpec::TST_char: 69 if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified) 70 Result = Context.CharTy; 71 else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed) 72 Result = Context.SignedCharTy; 73 else { 74 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && 75 "Unknown TSS value"); 76 Result = Context.UnsignedCharTy; 77 } 78 break; 79 case DeclSpec::TST_wchar: 80 if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified) 81 Result = Context.WCharTy; 82 else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed) { 83 Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec) 84 << DS.getSpecifierName(DS.getTypeSpecType()); 85 Result = Context.getSignedWCharType(); 86 } else { 87 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && 88 "Unknown TSS value"); 89 Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec) 90 << DS.getSpecifierName(DS.getTypeSpecType()); 91 Result = Context.getUnsignedWCharType(); 92 } 93 break; 94 case DeclSpec::TST_char16: 95 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unspecified && 96 "Unknown TSS value"); 97 Result = Context.Char16Ty; 98 break; 99 case DeclSpec::TST_char32: 100 assert(DS.getTypeSpecSign() == DeclSpec::TSS_unspecified && 101 "Unknown TSS value"); 102 Result = Context.Char32Ty; 103 break; 104 case DeclSpec::TST_unspecified: 105 // "<proto1,proto2>" is an objc qualified ID with a missing id. 106 if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) { 107 Result = Context.getObjCObjectPointerType(Context.ObjCBuiltinIdTy, 108 (ObjCProtocolDecl**)PQ, 109 DS.getNumProtocolQualifiers()); 110 break; 111 } 112 113 // Unspecified typespec defaults to int in C90. However, the C90 grammar 114 // [C90 6.5] only allows a decl-spec if there was *some* type-specifier, 115 // type-qualifier, or storage-class-specifier. If not, emit an extwarn. 116 // Note that the one exception to this is function definitions, which are 117 // allowed to be completely missing a declspec. This is handled in the 118 // parser already though by it pretending to have seen an 'int' in this 119 // case. 120 if (getLangOptions().ImplicitInt) { 121 // In C89 mode, we only warn if there is a completely missing declspec 122 // when one is not allowed. 123 if (DS.isEmpty()) { 124 if (DeclLoc.isInvalid()) 125 DeclLoc = DS.getSourceRange().getBegin(); 126 Diag(DeclLoc, diag::ext_missing_declspec) 127 << DS.getSourceRange() 128 << CodeModificationHint::CreateInsertion(DS.getSourceRange().getBegin(), 129 "int"); 130 } 131 } else if (!DS.hasTypeSpecifier()) { 132 // C99 and C++ require a type specifier. For example, C99 6.7.2p2 says: 133 // "At least one type specifier shall be given in the declaration 134 // specifiers in each declaration, and in the specifier-qualifier list in 135 // each struct declaration and type name." 136 // FIXME: Does Microsoft really have the implicit int extension in C++? 137 if (DeclLoc.isInvalid()) 138 DeclLoc = DS.getSourceRange().getBegin(); 139 140 if (getLangOptions().CPlusPlus && !getLangOptions().Microsoft) { 141 Diag(DeclLoc, diag::err_missing_type_specifier) 142 << DS.getSourceRange(); 143 144 // When this occurs in C++ code, often something is very broken with the 145 // value being declared, poison it as invalid so we don't get chains of 146 // errors. 147 isInvalid = true; 148 } else { 149 Diag(DeclLoc, diag::ext_missing_type_specifier) 150 << DS.getSourceRange(); 151 } 152 } 153 154 // FALL THROUGH. 155 case DeclSpec::TST_int: { 156 if (DS.getTypeSpecSign() != DeclSpec::TSS_unsigned) { 157 switch (DS.getTypeSpecWidth()) { 158 case DeclSpec::TSW_unspecified: Result = Context.IntTy; break; 159 case DeclSpec::TSW_short: Result = Context.ShortTy; break; 160 case DeclSpec::TSW_long: Result = Context.LongTy; break; 161 case DeclSpec::TSW_longlong: Result = Context.LongLongTy; break; 162 } 163 } else { 164 switch (DS.getTypeSpecWidth()) { 165 case DeclSpec::TSW_unspecified: Result = Context.UnsignedIntTy; break; 166 case DeclSpec::TSW_short: Result = Context.UnsignedShortTy; break; 167 case DeclSpec::TSW_long: Result = Context.UnsignedLongTy; break; 168 case DeclSpec::TSW_longlong: Result =Context.UnsignedLongLongTy; break; 169 } 170 } 171 break; 172 } 173 case DeclSpec::TST_float: Result = Context.FloatTy; break; 174 case DeclSpec::TST_double: 175 if (DS.getTypeSpecWidth() == DeclSpec::TSW_long) 176 Result = Context.LongDoubleTy; 177 else 178 Result = Context.DoubleTy; 179 break; 180 case DeclSpec::TST_bool: Result = Context.BoolTy; break; // _Bool or bool 181 case DeclSpec::TST_decimal32: // _Decimal32 182 case DeclSpec::TST_decimal64: // _Decimal64 183 case DeclSpec::TST_decimal128: // _Decimal128 184 Diag(DS.getTypeSpecTypeLoc(), diag::err_decimal_unsupported); 185 Result = Context.IntTy; 186 isInvalid = true; 187 break; 188 case DeclSpec::TST_class: 189 case DeclSpec::TST_enum: 190 case DeclSpec::TST_union: 191 case DeclSpec::TST_struct: { 192 Decl *D = static_cast<Decl *>(DS.getTypeRep()); 193 if (!D) { 194 // This can happen in C++ with ambiguous lookups. 195 Result = Context.IntTy; 196 isInvalid = true; 197 break; 198 } 199 200 assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && 201 DS.getTypeSpecSign() == 0 && 202 "Can't handle qualifiers on typedef names yet!"); 203 // TypeQuals handled by caller. 204 Result = Context.getTypeDeclType(cast<TypeDecl>(D)); 205 206 // In C++, make an ElaboratedType. 207 if (getLangOptions().CPlusPlus) { 208 TagDecl::TagKind Tag 209 = TagDecl::getTagKindForTypeSpec(DS.getTypeSpecType()); 210 Result = Context.getElaboratedType(Result, Tag); 211 } 212 213 if (D->isInvalidDecl()) 214 isInvalid = true; 215 break; 216 } 217 case DeclSpec::TST_typename: { 218 assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && 219 DS.getTypeSpecSign() == 0 && 220 "Can't handle qualifiers on typedef names yet!"); 221 Result = GetTypeFromParser(DS.getTypeRep()); 222 223 if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) { 224 if (const ObjCInterfaceType * 225 Interface = Result->getAs<ObjCInterfaceType>()) { 226 // It would be nice if protocol qualifiers were only stored with the 227 // ObjCObjectPointerType. Unfortunately, this isn't possible due 228 // to the following typedef idiom (which is uncommon, but allowed): 229 // 230 // typedef Foo<P> T; 231 // static void func() { 232 // Foo<P> *yy; 233 // T *zz; 234 // } 235 Result = Context.getObjCInterfaceType(Interface->getDecl(), 236 (ObjCProtocolDecl**)PQ, 237 DS.getNumProtocolQualifiers()); 238 } else if (Result->isObjCIdType()) 239 // id<protocol-list> 240 Result = Context.getObjCObjectPointerType(Context.ObjCBuiltinIdTy, 241 (ObjCProtocolDecl**)PQ, DS.getNumProtocolQualifiers()); 242 else if (Result->isObjCClassType()) { 243 if (DeclLoc.isInvalid()) 244 DeclLoc = DS.getSourceRange().getBegin(); 245 // Class<protocol-list> 246 Result = Context.getObjCObjectPointerType(Context.ObjCBuiltinClassTy, 247 (ObjCProtocolDecl**)PQ, DS.getNumProtocolQualifiers()); 248 } else { 249 if (DeclLoc.isInvalid()) 250 DeclLoc = DS.getSourceRange().getBegin(); 251 Diag(DeclLoc, diag::err_invalid_protocol_qualifiers) 252 << DS.getSourceRange(); 253 isInvalid = true; 254 } 255 } 256 257 // If this is a reference to an invalid typedef, propagate the invalidity. 258 if (TypedefType *TDT = dyn_cast<TypedefType>(Result)) 259 if (TDT->getDecl()->isInvalidDecl()) 260 isInvalid = true; 261 262 // TypeQuals handled by caller. 263 break; 264 } 265 case DeclSpec::TST_typeofType: 266 // FIXME: Preserve type source info. 267 Result = GetTypeFromParser(DS.getTypeRep()); 268 assert(!Result.isNull() && "Didn't get a type for typeof?"); 269 // TypeQuals handled by caller. 270 Result = Context.getTypeOfType(Result); 271 break; 272 case DeclSpec::TST_typeofExpr: { 273 Expr *E = static_cast<Expr *>(DS.getTypeRep()); 274 assert(E && "Didn't get an expression for typeof?"); 275 // TypeQuals handled by caller. 276 Result = Context.getTypeOfExprType(E); 277 break; 278 } 279 case DeclSpec::TST_decltype: { 280 Expr *E = static_cast<Expr *>(DS.getTypeRep()); 281 assert(E && "Didn't get an expression for decltype?"); 282 // TypeQuals handled by caller. 283 Result = BuildDecltypeType(E); 284 if (Result.isNull()) { 285 Result = Context.IntTy; 286 isInvalid = true; 287 } 288 break; 289 } 290 case DeclSpec::TST_auto: { 291 // TypeQuals handled by caller. 292 Result = Context.UndeducedAutoTy; 293 break; 294 } 295 296 case DeclSpec::TST_error: 297 Result = Context.IntTy; 298 isInvalid = true; 299 break; 300 } 301 302 // Handle complex types. 303 if (DS.getTypeSpecComplex() == DeclSpec::TSC_complex) { 304 if (getLangOptions().Freestanding) 305 Diag(DS.getTypeSpecComplexLoc(), diag::ext_freestanding_complex); 306 Result = Context.getComplexType(Result); 307 } 308 309 assert(DS.getTypeSpecComplex() != DeclSpec::TSC_imaginary && 310 "FIXME: imaginary types not supported yet!"); 311 312 // See if there are any attributes on the declspec that apply to the type (as 313 // opposed to the decl). 314 if (const AttributeList *AL = DS.getAttributes()) 315 ProcessTypeAttributeList(Result, AL); 316 317 // Apply const/volatile/restrict qualifiers to T. 318 if (unsigned TypeQuals = DS.getTypeQualifiers()) { 319 320 // Enforce C99 6.7.3p2: "Types other than pointer types derived from object 321 // or incomplete types shall not be restrict-qualified." C++ also allows 322 // restrict-qualified references. 323 if (TypeQuals & DeclSpec::TQ_restrict) { 324 if (Result->isPointerType() || Result->isReferenceType()) { 325 QualType EltTy = Result->isPointerType() ? 326 Result->getAs<PointerType>()->getPointeeType() : 327 Result->getAs<ReferenceType>()->getPointeeType(); 328 329 // If we have a pointer or reference, the pointee must have an object 330 // incomplete type. 331 if (!EltTy->isIncompleteOrObjectType()) { 332 Diag(DS.getRestrictSpecLoc(), 333 diag::err_typecheck_invalid_restrict_invalid_pointee) 334 << EltTy << DS.getSourceRange(); 335 TypeQuals &= ~DeclSpec::TQ_restrict; // Remove the restrict qualifier. 336 } 337 } else { 338 Diag(DS.getRestrictSpecLoc(), 339 diag::err_typecheck_invalid_restrict_not_pointer) 340 << Result << DS.getSourceRange(); 341 TypeQuals &= ~DeclSpec::TQ_restrict; // Remove the restrict qualifier. 342 } 343 } 344 345 // Warn about CV qualifiers on functions: C99 6.7.3p8: "If the specification 346 // of a function type includes any type qualifiers, the behavior is 347 // undefined." 348 if (Result->isFunctionType() && TypeQuals) { 349 // Get some location to point at, either the C or V location. 350 SourceLocation Loc; 351 if (TypeQuals & DeclSpec::TQ_const) 352 Loc = DS.getConstSpecLoc(); 353 else if (TypeQuals & DeclSpec::TQ_volatile) 354 Loc = DS.getVolatileSpecLoc(); 355 else { 356 assert((TypeQuals & DeclSpec::TQ_restrict) && 357 "Has CVR quals but not C, V, or R?"); 358 Loc = DS.getRestrictSpecLoc(); 359 } 360 Diag(Loc, diag::warn_typecheck_function_qualifiers) 361 << Result << DS.getSourceRange(); 362 } 363 364 // C++ [dcl.ref]p1: 365 // Cv-qualified references are ill-formed except when the 366 // cv-qualifiers are introduced through the use of a typedef 367 // (7.1.3) or of a template type argument (14.3), in which 368 // case the cv-qualifiers are ignored. 369 // FIXME: Shouldn't we be checking SCS_typedef here? 370 if (DS.getTypeSpecType() == DeclSpec::TST_typename && 371 TypeQuals && Result->isReferenceType()) { 372 TypeQuals &= ~DeclSpec::TQ_const; 373 TypeQuals &= ~DeclSpec::TQ_volatile; 374 } 375 376 Qualifiers Quals = Qualifiers::fromCVRMask(TypeQuals); 377 Result = Context.getQualifiedType(Result, Quals); 378 } 379 380 return Result; 381} 382 383static std::string getPrintableNameForEntity(DeclarationName Entity) { 384 if (Entity) 385 return Entity.getAsString(); 386 387 return "type name"; 388} 389 390/// \brief Build a pointer type. 391/// 392/// \param T The type to which we'll be building a pointer. 393/// 394/// \param Quals The cvr-qualifiers to be applied to the pointer type. 395/// 396/// \param Loc The location of the entity whose type involves this 397/// pointer type or, if there is no such entity, the location of the 398/// type that will have pointer type. 399/// 400/// \param Entity The name of the entity that involves the pointer 401/// type, if known. 402/// 403/// \returns A suitable pointer type, if there are no 404/// errors. Otherwise, returns a NULL type. 405QualType Sema::BuildPointerType(QualType T, unsigned Quals, 406 SourceLocation Loc, DeclarationName Entity) { 407 if (T->isReferenceType()) { 408 // C++ 8.3.2p4: There shall be no ... pointers to references ... 409 Diag(Loc, diag::err_illegal_decl_pointer_to_reference) 410 << getPrintableNameForEntity(Entity); 411 return QualType(); 412 } 413 414 Qualifiers Qs = Qualifiers::fromCVRMask(Quals); 415 416 // Enforce C99 6.7.3p2: "Types other than pointer types derived from 417 // object or incomplete types shall not be restrict-qualified." 418 if (Qs.hasRestrict() && !T->isIncompleteOrObjectType()) { 419 Diag(Loc, diag::err_typecheck_invalid_restrict_invalid_pointee) 420 << T; 421 Qs.removeRestrict(); 422 } 423 424 // Build the pointer type. 425 return Context.getQualifiedType(Context.getPointerType(T), Qs); 426} 427 428/// \brief Build a reference type. 429/// 430/// \param T The type to which we'll be building a reference. 431/// 432/// \param CVR The cvr-qualifiers to be applied to the reference type. 433/// 434/// \param Loc The location of the entity whose type involves this 435/// reference type or, if there is no such entity, the location of the 436/// type that will have reference type. 437/// 438/// \param Entity The name of the entity that involves the reference 439/// type, if known. 440/// 441/// \returns A suitable reference type, if there are no 442/// errors. Otherwise, returns a NULL type. 443QualType Sema::BuildReferenceType(QualType T, bool SpelledAsLValue, 444 unsigned CVR, SourceLocation Loc, 445 DeclarationName Entity) { 446 Qualifiers Quals = Qualifiers::fromCVRMask(CVR); 447 448 bool LValueRef = SpelledAsLValue || T->getAs<LValueReferenceType>(); 449 450 // C++0x [dcl.typedef]p9: If a typedef TD names a type that is a 451 // reference to a type T, and attempt to create the type "lvalue 452 // reference to cv TD" creates the type "lvalue reference to T". 453 // We use the qualifiers (restrict or none) of the original reference, 454 // not the new ones. This is consistent with GCC. 455 456 // C++ [dcl.ref]p4: There shall be no references to references. 457 // 458 // According to C++ DR 106, references to references are only 459 // diagnosed when they are written directly (e.g., "int & &"), 460 // but not when they happen via a typedef: 461 // 462 // typedef int& intref; 463 // typedef intref& intref2; 464 // 465 // Parser::ParseDeclaratorInternal diagnoses the case where 466 // references are written directly; here, we handle the 467 // collapsing of references-to-references as described in C++ 468 // DR 106 and amended by C++ DR 540. 469 470 // C++ [dcl.ref]p1: 471 // A declarator that specifies the type "reference to cv void" 472 // is ill-formed. 473 if (T->isVoidType()) { 474 Diag(Loc, diag::err_reference_to_void); 475 return QualType(); 476 } 477 478 // Enforce C99 6.7.3p2: "Types other than pointer types derived from 479 // object or incomplete types shall not be restrict-qualified." 480 if (Quals.hasRestrict() && !T->isIncompleteOrObjectType()) { 481 Diag(Loc, diag::err_typecheck_invalid_restrict_invalid_pointee) 482 << T; 483 Quals.removeRestrict(); 484 } 485 486 // C++ [dcl.ref]p1: 487 // [...] Cv-qualified references are ill-formed except when the 488 // cv-qualifiers are introduced through the use of a typedef 489 // (7.1.3) or of a template type argument (14.3), in which case 490 // the cv-qualifiers are ignored. 491 // 492 // We diagnose extraneous cv-qualifiers for the non-typedef, 493 // non-template type argument case within the parser. Here, we just 494 // ignore any extraneous cv-qualifiers. 495 Quals.removeConst(); 496 Quals.removeVolatile(); 497 498 // Handle restrict on references. 499 if (LValueRef) 500 return Context.getQualifiedType( 501 Context.getLValueReferenceType(T, SpelledAsLValue), Quals); 502 return Context.getQualifiedType(Context.getRValueReferenceType(T), Quals); 503} 504 505/// \brief Build an array type. 506/// 507/// \param T The type of each element in the array. 508/// 509/// \param ASM C99 array size modifier (e.g., '*', 'static'). 510/// 511/// \param ArraySize Expression describing the size of the array. 512/// 513/// \param Quals The cvr-qualifiers to be applied to the array's 514/// element type. 515/// 516/// \param Loc The location of the entity whose type involves this 517/// array type or, if there is no such entity, the location of the 518/// type that will have array type. 519/// 520/// \param Entity The name of the entity that involves the array 521/// type, if known. 522/// 523/// \returns A suitable array type, if there are no errors. Otherwise, 524/// returns a NULL type. 525QualType Sema::BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 526 Expr *ArraySize, unsigned Quals, 527 SourceRange Brackets, DeclarationName Entity) { 528 529 SourceLocation Loc = Brackets.getBegin(); 530 // C99 6.7.5.2p1: If the element type is an incomplete or function type, 531 // reject it (e.g. void ary[7], struct foo ary[7], void ary[7]()) 532 if (RequireCompleteType(Loc, T, 533 diag::err_illegal_decl_array_incomplete_type)) 534 return QualType(); 535 536 if (T->isFunctionType()) { 537 Diag(Loc, diag::err_illegal_decl_array_of_functions) 538 << getPrintableNameForEntity(Entity); 539 return QualType(); 540 } 541 542 // C++ 8.3.2p4: There shall be no ... arrays of references ... 543 if (T->isReferenceType()) { 544 Diag(Loc, diag::err_illegal_decl_array_of_references) 545 << getPrintableNameForEntity(Entity); 546 return QualType(); 547 } 548 549 if (Context.getCanonicalType(T) == Context.UndeducedAutoTy) { 550 Diag(Loc, diag::err_illegal_decl_array_of_auto) 551 << getPrintableNameForEntity(Entity); 552 return QualType(); 553 } 554 555 if (const RecordType *EltTy = T->getAs<RecordType>()) { 556 // If the element type is a struct or union that contains a variadic 557 // array, accept it as a GNU extension: C99 6.7.2.1p2. 558 if (EltTy->getDecl()->hasFlexibleArrayMember()) 559 Diag(Loc, diag::ext_flexible_array_in_array) << T; 560 } else if (T->isObjCInterfaceType()) { 561 Diag(Loc, diag::err_objc_array_of_interfaces) << T; 562 return QualType(); 563 } 564 565 // C99 6.7.5.2p1: The size expression shall have integer type. 566 if (ArraySize && !ArraySize->isTypeDependent() && 567 !ArraySize->getType()->isIntegerType()) { 568 Diag(ArraySize->getLocStart(), diag::err_array_size_non_int) 569 << ArraySize->getType() << ArraySize->getSourceRange(); 570 ArraySize->Destroy(Context); 571 return QualType(); 572 } 573 llvm::APSInt ConstVal(32); 574 if (!ArraySize) { 575 if (ASM == ArrayType::Star) 576 T = Context.getVariableArrayType(T, 0, ASM, Quals, Brackets); 577 else 578 T = Context.getIncompleteArrayType(T, ASM, Quals); 579 } else if (ArraySize->isValueDependent()) { 580 T = Context.getDependentSizedArrayType(T, ArraySize, ASM, Quals, Brackets); 581 } else if (!ArraySize->isIntegerConstantExpr(ConstVal, Context) || 582 (!T->isDependentType() && !T->isConstantSizeType())) { 583 // Per C99, a variable array is an array with either a non-constant 584 // size or an element type that has a non-constant-size 585 T = Context.getVariableArrayType(T, ArraySize, ASM, Quals, Brackets); 586 } else { 587 // C99 6.7.5.2p1: If the expression is a constant expression, it shall 588 // have a value greater than zero. 589 if (ConstVal.isSigned()) { 590 if (ConstVal.isNegative()) { 591 Diag(ArraySize->getLocStart(), 592 diag::err_typecheck_negative_array_size) 593 << ArraySize->getSourceRange(); 594 return QualType(); 595 } else if (ConstVal == 0) { 596 // GCC accepts zero sized static arrays. 597 Diag(ArraySize->getLocStart(), diag::ext_typecheck_zero_array_size) 598 << ArraySize->getSourceRange(); 599 } 600 } 601 T = Context.getConstantArrayType(T, ConstVal, ASM, Quals); 602 } 603 // If this is not C99, extwarn about VLA's and C99 array size modifiers. 604 if (!getLangOptions().C99) { 605 if (ArraySize && !ArraySize->isTypeDependent() && 606 !ArraySize->isValueDependent() && 607 !ArraySize->isIntegerConstantExpr(Context)) 608 Diag(Loc, getLangOptions().CPlusPlus? diag::err_vla_cxx : diag::ext_vla); 609 else if (ASM != ArrayType::Normal || Quals != 0) 610 Diag(Loc, 611 getLangOptions().CPlusPlus? diag::err_c99_array_usage_cxx 612 : diag::ext_c99_array_usage); 613 } 614 615 return T; 616} 617 618/// \brief Build an ext-vector type. 619/// 620/// Run the required checks for the extended vector type. 621QualType Sema::BuildExtVectorType(QualType T, ExprArg ArraySize, 622 SourceLocation AttrLoc) { 623 624 Expr *Arg = (Expr *)ArraySize.get(); 625 626 // unlike gcc's vector_size attribute, we do not allow vectors to be defined 627 // in conjunction with complex types (pointers, arrays, functions, etc.). 628 if (!T->isDependentType() && 629 !T->isIntegerType() && !T->isRealFloatingType()) { 630 Diag(AttrLoc, diag::err_attribute_invalid_vector_type) << T; 631 return QualType(); 632 } 633 634 if (!Arg->isTypeDependent() && !Arg->isValueDependent()) { 635 llvm::APSInt vecSize(32); 636 if (!Arg->isIntegerConstantExpr(vecSize, Context)) { 637 Diag(AttrLoc, diag::err_attribute_argument_not_int) 638 << "ext_vector_type" << Arg->getSourceRange(); 639 return QualType(); 640 } 641 642 // unlike gcc's vector_size attribute, the size is specified as the 643 // number of elements, not the number of bytes. 644 unsigned vectorSize = static_cast<unsigned>(vecSize.getZExtValue()); 645 646 if (vectorSize == 0) { 647 Diag(AttrLoc, diag::err_attribute_zero_size) 648 << Arg->getSourceRange(); 649 return QualType(); 650 } 651 652 if (!T->isDependentType()) 653 return Context.getExtVectorType(T, vectorSize); 654 } 655 656 return Context.getDependentSizedExtVectorType(T, ArraySize.takeAs<Expr>(), 657 AttrLoc); 658} 659 660/// \brief Build a function type. 661/// 662/// This routine checks the function type according to C++ rules and 663/// under the assumption that the result type and parameter types have 664/// just been instantiated from a template. It therefore duplicates 665/// some of the behavior of GetTypeForDeclarator, but in a much 666/// simpler form that is only suitable for this narrow use case. 667/// 668/// \param T The return type of the function. 669/// 670/// \param ParamTypes The parameter types of the function. This array 671/// will be modified to account for adjustments to the types of the 672/// function parameters. 673/// 674/// \param NumParamTypes The number of parameter types in ParamTypes. 675/// 676/// \param Variadic Whether this is a variadic function type. 677/// 678/// \param Quals The cvr-qualifiers to be applied to the function type. 679/// 680/// \param Loc The location of the entity whose type involves this 681/// function type or, if there is no such entity, the location of the 682/// type that will have function type. 683/// 684/// \param Entity The name of the entity that involves the function 685/// type, if known. 686/// 687/// \returns A suitable function type, if there are no 688/// errors. Otherwise, returns a NULL type. 689QualType Sema::BuildFunctionType(QualType T, 690 QualType *ParamTypes, 691 unsigned NumParamTypes, 692 bool Variadic, unsigned Quals, 693 SourceLocation Loc, DeclarationName Entity) { 694 if (T->isArrayType() || T->isFunctionType()) { 695 Diag(Loc, diag::err_func_returning_array_function) << T; 696 return QualType(); 697 } 698 699 bool Invalid = false; 700 for (unsigned Idx = 0; Idx < NumParamTypes; ++Idx) { 701 QualType ParamType = adjustParameterType(ParamTypes[Idx]); 702 if (ParamType->isVoidType()) { 703 Diag(Loc, diag::err_param_with_void_type); 704 Invalid = true; 705 } 706 707 ParamTypes[Idx] = ParamType; 708 } 709 710 if (Invalid) 711 return QualType(); 712 713 return Context.getFunctionType(T, ParamTypes, NumParamTypes, Variadic, 714 Quals); 715} 716 717/// \brief Build a member pointer type \c T Class::*. 718/// 719/// \param T the type to which the member pointer refers. 720/// \param Class the class type into which the member pointer points. 721/// \param CVR Qualifiers applied to the member pointer type 722/// \param Loc the location where this type begins 723/// \param Entity the name of the entity that will have this member pointer type 724/// 725/// \returns a member pointer type, if successful, or a NULL type if there was 726/// an error. 727QualType Sema::BuildMemberPointerType(QualType T, QualType Class, 728 unsigned CVR, SourceLocation Loc, 729 DeclarationName Entity) { 730 Qualifiers Quals = Qualifiers::fromCVRMask(CVR); 731 732 // Verify that we're not building a pointer to pointer to function with 733 // exception specification. 734 if (CheckDistantExceptionSpec(T)) { 735 Diag(Loc, diag::err_distant_exception_spec); 736 737 // FIXME: If we're doing this as part of template instantiation, 738 // we should return immediately. 739 740 // Build the type anyway, but use the canonical type so that the 741 // exception specifiers are stripped off. 742 T = Context.getCanonicalType(T); 743 } 744 745 // C++ 8.3.3p3: A pointer to member shall not pointer to ... a member 746 // with reference type, or "cv void." 747 if (T->isReferenceType()) { 748 Diag(Loc, diag::err_illegal_decl_mempointer_to_reference) 749 << (Entity? Entity.getAsString() : "type name"); 750 return QualType(); 751 } 752 753 if (T->isVoidType()) { 754 Diag(Loc, diag::err_illegal_decl_mempointer_to_void) 755 << (Entity? Entity.getAsString() : "type name"); 756 return QualType(); 757 } 758 759 // Enforce C99 6.7.3p2: "Types other than pointer types derived from 760 // object or incomplete types shall not be restrict-qualified." 761 if (Quals.hasRestrict() && !T->isIncompleteOrObjectType()) { 762 Diag(Loc, diag::err_typecheck_invalid_restrict_invalid_pointee) 763 << T; 764 765 // FIXME: If we're doing this as part of template instantiation, 766 // we should return immediately. 767 Quals.removeRestrict(); 768 } 769 770 if (!Class->isDependentType() && !Class->isRecordType()) { 771 Diag(Loc, diag::err_mempointer_in_nonclass_type) << Class; 772 return QualType(); 773 } 774 775 return Context.getQualifiedType( 776 Context.getMemberPointerType(T, Class.getTypePtr()), Quals); 777} 778 779/// \brief Build a block pointer type. 780/// 781/// \param T The type to which we'll be building a block pointer. 782/// 783/// \param CVR The cvr-qualifiers to be applied to the block pointer type. 784/// 785/// \param Loc The location of the entity whose type involves this 786/// block pointer type or, if there is no such entity, the location of the 787/// type that will have block pointer type. 788/// 789/// \param Entity The name of the entity that involves the block pointer 790/// type, if known. 791/// 792/// \returns A suitable block pointer type, if there are no 793/// errors. Otherwise, returns a NULL type. 794QualType Sema::BuildBlockPointerType(QualType T, unsigned CVR, 795 SourceLocation Loc, 796 DeclarationName Entity) { 797 if (!T->isFunctionType()) { 798 Diag(Loc, diag::err_nonfunction_block_type); 799 return QualType(); 800 } 801 802 Qualifiers Quals = Qualifiers::fromCVRMask(CVR); 803 return Context.getQualifiedType(Context.getBlockPointerType(T), Quals); 804} 805 806QualType Sema::GetTypeFromParser(TypeTy *Ty, DeclaratorInfo **DInfo) { 807 QualType QT = QualType::getFromOpaquePtr(Ty); 808 DeclaratorInfo *DI = 0; 809 if (LocInfoType *LIT = dyn_cast<LocInfoType>(QT)) { 810 QT = LIT->getType(); 811 DI = LIT->getDeclaratorInfo(); 812 } 813 814 if (DInfo) *DInfo = DI; 815 return QT; 816} 817 818/// GetTypeForDeclarator - Convert the type for the specified 819/// declarator to Type instances. Skip the outermost Skip type 820/// objects. 821/// 822/// If OwnedDecl is non-NULL, and this declarator's decl-specifier-seq 823/// owns the declaration of a type (e.g., the definition of a struct 824/// type), then *OwnedDecl will receive the owned declaration. 825QualType Sema::GetTypeForDeclarator(Declarator &D, Scope *S, 826 DeclaratorInfo **DInfo, unsigned Skip, 827 TagDecl **OwnedDecl) { 828 bool OmittedReturnType = false; 829 830 if (D.getContext() == Declarator::BlockLiteralContext 831 && Skip == 0 832 && !D.getDeclSpec().hasTypeSpecifier() 833 && (D.getNumTypeObjects() == 0 834 || (D.getNumTypeObjects() == 1 835 && D.getTypeObject(0).Kind == DeclaratorChunk::Function))) 836 OmittedReturnType = true; 837 838 // long long is a C99 feature. 839 if (!getLangOptions().C99 && !getLangOptions().CPlusPlus0x && 840 D.getDeclSpec().getTypeSpecWidth() == DeclSpec::TSW_longlong) 841 Diag(D.getDeclSpec().getTypeSpecWidthLoc(), diag::ext_longlong); 842 843 // Determine the type of the declarator. Not all forms of declarator 844 // have a type. 845 QualType T; 846 847 switch (D.getKind()) { 848 case Declarator::DK_Abstract: 849 case Declarator::DK_Normal: 850 case Declarator::DK_Operator: 851 case Declarator::DK_TemplateId: { 852 const DeclSpec &DS = D.getDeclSpec(); 853 if (OmittedReturnType) { 854 // We default to a dependent type initially. Can be modified by 855 // the first return statement. 856 T = Context.DependentTy; 857 } else { 858 bool isInvalid = false; 859 T = ConvertDeclSpecToType(DS, D.getIdentifierLoc(), isInvalid); 860 if (isInvalid) 861 D.setInvalidType(true); 862 else if (OwnedDecl && DS.isTypeSpecOwned()) 863 *OwnedDecl = cast<TagDecl>((Decl *)DS.getTypeRep()); 864 } 865 break; 866 } 867 868 case Declarator::DK_Constructor: 869 case Declarator::DK_Destructor: 870 case Declarator::DK_Conversion: 871 // Constructors and destructors don't have return types. Use 872 // "void" instead. Conversion operators will check their return 873 // types separately. 874 T = Context.VoidTy; 875 break; 876 } 877 878 if (T == Context.UndeducedAutoTy) { 879 int Error = -1; 880 881 switch (D.getContext()) { 882 case Declarator::KNRTypeListContext: 883 assert(0 && "K&R type lists aren't allowed in C++"); 884 break; 885 case Declarator::PrototypeContext: 886 Error = 0; // Function prototype 887 break; 888 case Declarator::MemberContext: 889 switch (cast<TagDecl>(CurContext)->getTagKind()) { 890 case TagDecl::TK_enum: assert(0 && "unhandled tag kind"); break; 891 case TagDecl::TK_struct: Error = 1; /* Struct member */ break; 892 case TagDecl::TK_union: Error = 2; /* Union member */ break; 893 case TagDecl::TK_class: Error = 3; /* Class member */ break; 894 } 895 break; 896 case Declarator::CXXCatchContext: 897 Error = 4; // Exception declaration 898 break; 899 case Declarator::TemplateParamContext: 900 Error = 5; // Template parameter 901 break; 902 case Declarator::BlockLiteralContext: 903 Error = 6; // Block literal 904 break; 905 case Declarator::FileContext: 906 case Declarator::BlockContext: 907 case Declarator::ForContext: 908 case Declarator::ConditionContext: 909 case Declarator::TypeNameContext: 910 break; 911 } 912 913 if (Error != -1) { 914 Diag(D.getDeclSpec().getTypeSpecTypeLoc(), diag::err_auto_not_allowed) 915 << Error; 916 T = Context.IntTy; 917 D.setInvalidType(true); 918 } 919 } 920 921 // The name we're declaring, if any. 922 DeclarationName Name; 923 if (D.getIdentifier()) 924 Name = D.getIdentifier(); 925 926 // Walk the DeclTypeInfo, building the recursive type as we go. 927 // DeclTypeInfos are ordered from the identifier out, which is 928 // opposite of what we want :). 929 for (unsigned i = Skip, e = D.getNumTypeObjects(); i != e; ++i) { 930 DeclaratorChunk &DeclType = D.getTypeObject(e-i-1+Skip); 931 switch (DeclType.Kind) { 932 default: assert(0 && "Unknown decltype!"); 933 case DeclaratorChunk::BlockPointer: 934 // If blocks are disabled, emit an error. 935 if (!LangOpts.Blocks) 936 Diag(DeclType.Loc, diag::err_blocks_disable); 937 938 T = BuildBlockPointerType(T, DeclType.Cls.TypeQuals, D.getIdentifierLoc(), 939 Name); 940 break; 941 case DeclaratorChunk::Pointer: 942 // Verify that we're not building a pointer to pointer to function with 943 // exception specification. 944 if (getLangOptions().CPlusPlus && CheckDistantExceptionSpec(T)) { 945 Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); 946 D.setInvalidType(true); 947 // Build the type anyway. 948 } 949 if (getLangOptions().ObjC1 && T->isObjCInterfaceType()) { 950 const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>(); 951 T = Context.getObjCObjectPointerType(T, 952 (ObjCProtocolDecl **)OIT->qual_begin(), 953 OIT->getNumProtocols()); 954 break; 955 } 956 T = BuildPointerType(T, DeclType.Ptr.TypeQuals, DeclType.Loc, Name); 957 break; 958 case DeclaratorChunk::Reference: { 959 Qualifiers Quals; 960 if (DeclType.Ref.HasRestrict) Quals.addRestrict(); 961 962 // Verify that we're not building a reference to pointer to function with 963 // exception specification. 964 if (getLangOptions().CPlusPlus && CheckDistantExceptionSpec(T)) { 965 Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); 966 D.setInvalidType(true); 967 // Build the type anyway. 968 } 969 T = BuildReferenceType(T, DeclType.Ref.LValueRef, Quals, 970 DeclType.Loc, Name); 971 break; 972 } 973 case DeclaratorChunk::Array: { 974 // Verify that we're not building an array of pointers to function with 975 // exception specification. 976 if (getLangOptions().CPlusPlus && CheckDistantExceptionSpec(T)) { 977 Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); 978 D.setInvalidType(true); 979 // Build the type anyway. 980 } 981 DeclaratorChunk::ArrayTypeInfo &ATI = DeclType.Arr; 982 Expr *ArraySize = static_cast<Expr*>(ATI.NumElts); 983 ArrayType::ArraySizeModifier ASM; 984 if (ATI.isStar) 985 ASM = ArrayType::Star; 986 else if (ATI.hasStatic) 987 ASM = ArrayType::Static; 988 else 989 ASM = ArrayType::Normal; 990 if (ASM == ArrayType::Star && 991 D.getContext() != Declarator::PrototypeContext) { 992 // FIXME: This check isn't quite right: it allows star in prototypes 993 // for function definitions, and disallows some edge cases detailed 994 // in http://gcc.gnu.org/ml/gcc-patches/2009-02/msg00133.html 995 Diag(DeclType.Loc, diag::err_array_star_outside_prototype); 996 ASM = ArrayType::Normal; 997 D.setInvalidType(true); 998 } 999 T = BuildArrayType(T, ASM, ArraySize, 1000 Qualifiers::fromCVRMask(ATI.TypeQuals), 1001 SourceRange(DeclType.Loc, DeclType.EndLoc), Name); 1002 break; 1003 } 1004 case DeclaratorChunk::Function: { 1005 // If the function declarator has a prototype (i.e. it is not () and 1006 // does not have a K&R-style identifier list), then the arguments are part 1007 // of the type, otherwise the argument list is (). 1008 const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun; 1009 1010 // C99 6.7.5.3p1: The return type may not be a function or array type. 1011 if (T->isArrayType() || T->isFunctionType()) { 1012 Diag(DeclType.Loc, diag::err_func_returning_array_function) << T; 1013 T = Context.IntTy; 1014 D.setInvalidType(true); 1015 } 1016 1017 if (getLangOptions().CPlusPlus && D.getDeclSpec().isTypeSpecOwned()) { 1018 // C++ [dcl.fct]p6: 1019 // Types shall not be defined in return or parameter types. 1020 TagDecl *Tag = cast<TagDecl>((Decl *)D.getDeclSpec().getTypeRep()); 1021 if (Tag->isDefinition()) 1022 Diag(Tag->getLocation(), diag::err_type_defined_in_result_type) 1023 << Context.getTypeDeclType(Tag); 1024 } 1025 1026 // Exception specs are not allowed in typedefs. Complain, but add it 1027 // anyway. 1028 if (FTI.hasExceptionSpec && 1029 D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) 1030 Diag(FTI.getThrowLoc(), diag::err_exception_spec_in_typedef); 1031 1032 if (FTI.NumArgs == 0) { 1033 if (getLangOptions().CPlusPlus) { 1034 // C++ 8.3.5p2: If the parameter-declaration-clause is empty, the 1035 // function takes no arguments. 1036 llvm::SmallVector<QualType, 4> Exceptions; 1037 Exceptions.reserve(FTI.NumExceptions); 1038 for (unsigned ei = 0, ee = FTI.NumExceptions; ei != ee; ++ei) { 1039 // FIXME: Preserve type source info. 1040 QualType ET = GetTypeFromParser(FTI.Exceptions[ei].Ty); 1041 // Check that the type is valid for an exception spec, and drop it 1042 // if not. 1043 if (!CheckSpecifiedExceptionType(ET, FTI.Exceptions[ei].Range)) 1044 Exceptions.push_back(ET); 1045 } 1046 T = Context.getFunctionType(T, NULL, 0, FTI.isVariadic, FTI.TypeQuals, 1047 FTI.hasExceptionSpec, 1048 FTI.hasAnyExceptionSpec, 1049 Exceptions.size(), Exceptions.data()); 1050 } else if (FTI.isVariadic) { 1051 // We allow a zero-parameter variadic function in C if the 1052 // function is marked with the "overloadable" 1053 // attribute. Scan for this attribute now. 1054 bool Overloadable = false; 1055 for (const AttributeList *Attrs = D.getAttributes(); 1056 Attrs; Attrs = Attrs->getNext()) { 1057 if (Attrs->getKind() == AttributeList::AT_overloadable) { 1058 Overloadable = true; 1059 break; 1060 } 1061 } 1062 1063 if (!Overloadable) 1064 Diag(FTI.getEllipsisLoc(), diag::err_ellipsis_first_arg); 1065 T = Context.getFunctionType(T, NULL, 0, FTI.isVariadic, 0); 1066 } else { 1067 // Simple void foo(), where the incoming T is the result type. 1068 T = Context.getFunctionNoProtoType(T); 1069 } 1070 } else if (FTI.ArgInfo[0].Param == 0) { 1071 // C99 6.7.5.3p3: Reject int(x,y,z) when it's not a function definition. 1072 Diag(FTI.ArgInfo[0].IdentLoc, diag::err_ident_list_in_fn_declaration); 1073 D.setInvalidType(true); 1074 } else { 1075 // Otherwise, we have a function with an argument list that is 1076 // potentially variadic. 1077 llvm::SmallVector<QualType, 16> ArgTys; 1078 1079 for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) { 1080 ParmVarDecl *Param = 1081 cast<ParmVarDecl>(FTI.ArgInfo[i].Param.getAs<Decl>()); 1082 QualType ArgTy = Param->getType(); 1083 assert(!ArgTy.isNull() && "Couldn't parse type?"); 1084 1085 // Adjust the parameter type. 1086 assert((ArgTy == adjustParameterType(ArgTy)) && "Unadjusted type?"); 1087 1088 // Look for 'void'. void is allowed only as a single argument to a 1089 // function with no other parameters (C99 6.7.5.3p10). We record 1090 // int(void) as a FunctionProtoType with an empty argument list. 1091 if (ArgTy->isVoidType()) { 1092 // If this is something like 'float(int, void)', reject it. 'void' 1093 // is an incomplete type (C99 6.2.5p19) and function decls cannot 1094 // have arguments of incomplete type. 1095 if (FTI.NumArgs != 1 || FTI.isVariadic) { 1096 Diag(DeclType.Loc, diag::err_void_only_param); 1097 ArgTy = Context.IntTy; 1098 Param->setType(ArgTy); 1099 } else if (FTI.ArgInfo[i].Ident) { 1100 // Reject, but continue to parse 'int(void abc)'. 1101 Diag(FTI.ArgInfo[i].IdentLoc, 1102 diag::err_param_with_void_type); 1103 ArgTy = Context.IntTy; 1104 Param->setType(ArgTy); 1105 } else { 1106 // Reject, but continue to parse 'float(const void)'. 1107 if (ArgTy.hasQualifiers()) 1108 Diag(DeclType.Loc, diag::err_void_param_qualified); 1109 1110 // Do not add 'void' to the ArgTys list. 1111 break; 1112 } 1113 } else if (!FTI.hasPrototype) { 1114 if (ArgTy->isPromotableIntegerType()) { 1115 ArgTy = Context.getPromotedIntegerType(ArgTy); 1116 } else if (const BuiltinType* BTy = ArgTy->getAs<BuiltinType>()) { 1117 if (BTy->getKind() == BuiltinType::Float) 1118 ArgTy = Context.DoubleTy; 1119 } 1120 } 1121 1122 ArgTys.push_back(ArgTy); 1123 } 1124 1125 llvm::SmallVector<QualType, 4> Exceptions; 1126 Exceptions.reserve(FTI.NumExceptions); 1127 for (unsigned ei = 0, ee = FTI.NumExceptions; ei != ee; ++ei) { 1128 // FIXME: Preserve type source info. 1129 QualType ET = GetTypeFromParser(FTI.Exceptions[ei].Ty); 1130 // Check that the type is valid for an exception spec, and drop it if 1131 // not. 1132 if (!CheckSpecifiedExceptionType(ET, FTI.Exceptions[ei].Range)) 1133 Exceptions.push_back(ET); 1134 } 1135 1136 T = Context.getFunctionType(T, ArgTys.data(), ArgTys.size(), 1137 FTI.isVariadic, FTI.TypeQuals, 1138 FTI.hasExceptionSpec, 1139 FTI.hasAnyExceptionSpec, 1140 Exceptions.size(), Exceptions.data()); 1141 } 1142 break; 1143 } 1144 case DeclaratorChunk::MemberPointer: 1145 // Verify that we're not building a pointer to pointer to function with 1146 // exception specification. 1147 if (getLangOptions().CPlusPlus && CheckDistantExceptionSpec(T)) { 1148 Diag(D.getIdentifierLoc(), diag::err_distant_exception_spec); 1149 D.setInvalidType(true); 1150 // Build the type anyway. 1151 } 1152 // The scope spec must refer to a class, or be dependent. 1153 QualType ClsType; 1154 if (isDependentScopeSpecifier(DeclType.Mem.Scope())) { 1155 NestedNameSpecifier *NNS 1156 = (NestedNameSpecifier *)DeclType.Mem.Scope().getScopeRep(); 1157 assert(NNS->getAsType() && "Nested-name-specifier must name a type"); 1158 ClsType = QualType(NNS->getAsType(), 0); 1159 } else if (CXXRecordDecl *RD 1160 = dyn_cast_or_null<CXXRecordDecl>( 1161 computeDeclContext(DeclType.Mem.Scope()))) { 1162 ClsType = Context.getTagDeclType(RD); 1163 } else { 1164 Diag(DeclType.Mem.Scope().getBeginLoc(), 1165 diag::err_illegal_decl_mempointer_in_nonclass) 1166 << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name") 1167 << DeclType.Mem.Scope().getRange(); 1168 D.setInvalidType(true); 1169 } 1170 1171 if (!ClsType.isNull()) 1172 T = BuildMemberPointerType(T, ClsType, DeclType.Mem.TypeQuals, 1173 DeclType.Loc, D.getIdentifier()); 1174 if (T.isNull()) { 1175 T = Context.IntTy; 1176 D.setInvalidType(true); 1177 } 1178 break; 1179 } 1180 1181 if (T.isNull()) { 1182 D.setInvalidType(true); 1183 T = Context.IntTy; 1184 } 1185 1186 // See if there are any attributes on this declarator chunk. 1187 if (const AttributeList *AL = DeclType.getAttrs()) 1188 ProcessTypeAttributeList(T, AL); 1189 } 1190 1191 if (getLangOptions().CPlusPlus && T->isFunctionType()) { 1192 const FunctionProtoType *FnTy = T->getAs<FunctionProtoType>(); 1193 assert(FnTy && "Why oh why is there not a FunctionProtoType here ?"); 1194 1195 // C++ 8.3.5p4: A cv-qualifier-seq shall only be part of the function type 1196 // for a nonstatic member function, the function type to which a pointer 1197 // to member refers, or the top-level function type of a function typedef 1198 // declaration. 1199 if (FnTy->getTypeQuals() != 0 && 1200 D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && 1201 ((D.getContext() != Declarator::MemberContext && 1202 (!D.getCXXScopeSpec().isSet() || 1203 !computeDeclContext(D.getCXXScopeSpec(), /*FIXME:*/true) 1204 ->isRecord())) || 1205 D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static)) { 1206 if (D.isFunctionDeclarator()) 1207 Diag(D.getIdentifierLoc(), diag::err_invalid_qualified_function_type); 1208 else 1209 Diag(D.getIdentifierLoc(), 1210 diag::err_invalid_qualified_typedef_function_type_use); 1211 1212 // Strip the cv-quals from the type. 1213 T = Context.getFunctionType(FnTy->getResultType(), FnTy->arg_type_begin(), 1214 FnTy->getNumArgs(), FnTy->isVariadic(), 0); 1215 } 1216 } 1217 1218 // If there were any type attributes applied to the decl itself (not the 1219 // type, apply the type attribute to the type!) 1220 if (const AttributeList *Attrs = D.getAttributes()) 1221 ProcessTypeAttributeList(T, Attrs); 1222 1223 if (DInfo) { 1224 if (D.isInvalidType()) 1225 *DInfo = 0; 1226 else 1227 *DInfo = GetDeclaratorInfoForDeclarator(D, T, Skip); 1228 } 1229 1230 return T; 1231} 1232 1233namespace { 1234 class TypeSpecLocFiller : public TypeLocVisitor<TypeSpecLocFiller> { 1235 const DeclSpec &DS; 1236 1237 public: 1238 TypeSpecLocFiller(const DeclSpec &DS) : DS(DS) {} 1239 1240 void VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 1241 Visit(TL.getUnqualifiedLoc()); 1242 } 1243 void VisitTypedefTypeLoc(TypedefTypeLoc TL) { 1244 TL.setNameLoc(DS.getTypeSpecTypeLoc()); 1245 } 1246 void VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { 1247 TL.setNameLoc(DS.getTypeSpecTypeLoc()); 1248 1249 if (DS.getProtocolQualifiers()) { 1250 assert(TL.getNumProtocols() > 0); 1251 assert(TL.getNumProtocols() == DS.getNumProtocolQualifiers()); 1252 TL.setLAngleLoc(DS.getProtocolLAngleLoc()); 1253 TL.setRAngleLoc(DS.getSourceRange().getEnd()); 1254 for (unsigned i = 0, e = DS.getNumProtocolQualifiers(); i != e; ++i) 1255 TL.setProtocolLoc(i, DS.getProtocolLocs()[i]); 1256 } else { 1257 assert(TL.getNumProtocols() == 0); 1258 TL.setLAngleLoc(SourceLocation()); 1259 TL.setRAngleLoc(SourceLocation()); 1260 } 1261 } 1262 void VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 1263 assert(TL.getNumProtocols() == DS.getNumProtocolQualifiers()); 1264 1265 TL.setStarLoc(SourceLocation()); 1266 1267 if (DS.getProtocolQualifiers()) { 1268 assert(TL.getNumProtocols() > 0); 1269 assert(TL.getNumProtocols() == DS.getNumProtocolQualifiers()); 1270 TL.setHasProtocolsAsWritten(true); 1271 TL.setLAngleLoc(DS.getProtocolLAngleLoc()); 1272 TL.setRAngleLoc(DS.getSourceRange().getEnd()); 1273 for (unsigned i = 0, e = DS.getNumProtocolQualifiers(); i != e; ++i) 1274 TL.setProtocolLoc(i, DS.getProtocolLocs()[i]); 1275 1276 } else { 1277 assert(TL.getNumProtocols() == 0); 1278 TL.setHasProtocolsAsWritten(false); 1279 TL.setLAngleLoc(SourceLocation()); 1280 TL.setRAngleLoc(SourceLocation()); 1281 } 1282 1283 // This might not have been written with an inner type. 1284 if (DS.getTypeSpecType() == DeclSpec::TST_unspecified) { 1285 TL.setHasBaseTypeAsWritten(false); 1286 TL.getBaseTypeLoc().initialize(SourceLocation()); 1287 } else { 1288 TL.setHasBaseTypeAsWritten(true); 1289 Visit(TL.getBaseTypeLoc()); 1290 } 1291 } 1292 void VisitTypeLoc(TypeLoc TL) { 1293 // FIXME: add other typespec types and change this to an assert. 1294 TL.initialize(DS.getTypeSpecTypeLoc()); 1295 } 1296 }; 1297 1298 class DeclaratorLocFiller : public TypeLocVisitor<DeclaratorLocFiller> { 1299 const DeclaratorChunk &Chunk; 1300 1301 public: 1302 DeclaratorLocFiller(const DeclaratorChunk &Chunk) : Chunk(Chunk) {} 1303 1304 void VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 1305 llvm::llvm_unreachable("qualified type locs not expected here!"); 1306 } 1307 1308 void VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { 1309 assert(Chunk.Kind == DeclaratorChunk::BlockPointer); 1310 TL.setCaretLoc(Chunk.Loc); 1311 } 1312 void VisitPointerTypeLoc(PointerTypeLoc TL) { 1313 assert(Chunk.Kind == DeclaratorChunk::Pointer); 1314 TL.setStarLoc(Chunk.Loc); 1315 } 1316 void VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 1317 assert(Chunk.Kind == DeclaratorChunk::Pointer); 1318 TL.setStarLoc(Chunk.Loc); 1319 TL.setHasBaseTypeAsWritten(true); 1320 TL.setHasProtocolsAsWritten(false); 1321 TL.setLAngleLoc(SourceLocation()); 1322 TL.setRAngleLoc(SourceLocation()); 1323 } 1324 void VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { 1325 assert(Chunk.Kind == DeclaratorChunk::MemberPointer); 1326 TL.setStarLoc(Chunk.Loc); 1327 // FIXME: nested name specifier 1328 } 1329 void VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { 1330 assert(Chunk.Kind == DeclaratorChunk::Reference); 1331 // 'Amp' is misleading: this might have been originally 1332 /// spelled with AmpAmp. 1333 TL.setAmpLoc(Chunk.Loc); 1334 } 1335 void VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { 1336 assert(Chunk.Kind == DeclaratorChunk::Reference); 1337 assert(!Chunk.Ref.LValueRef); 1338 TL.setAmpAmpLoc(Chunk.Loc); 1339 } 1340 void VisitArrayTypeLoc(ArrayTypeLoc TL) { 1341 assert(Chunk.Kind == DeclaratorChunk::Array); 1342 TL.setLBracketLoc(Chunk.Loc); 1343 TL.setRBracketLoc(Chunk.EndLoc); 1344 TL.setSizeExpr(static_cast<Expr*>(Chunk.Arr.NumElts)); 1345 } 1346 void VisitFunctionTypeLoc(FunctionTypeLoc TL) { 1347 assert(Chunk.Kind == DeclaratorChunk::Function); 1348 TL.setLParenLoc(Chunk.Loc); 1349 TL.setRParenLoc(Chunk.EndLoc); 1350 1351 const DeclaratorChunk::FunctionTypeInfo &FTI = Chunk.Fun; 1352 for (unsigned i = 0, e = TL.getNumArgs(), tpi = 0; i != e; ++i) { 1353 ParmVarDecl *Param = FTI.ArgInfo[i].Param.getAs<ParmVarDecl>(); 1354 TL.setArg(tpi++, Param); 1355 } 1356 // FIXME: exception specs 1357 } 1358 1359 void VisitTypeLoc(TypeLoc TL) { 1360 llvm::llvm_unreachable("unsupported TypeLoc kind in declarator!"); 1361 } 1362 }; 1363} 1364 1365/// \brief Create and instantiate a DeclaratorInfo with type source information. 1366/// 1367/// \param T QualType referring to the type as written in source code. 1368DeclaratorInfo * 1369Sema::GetDeclaratorInfoForDeclarator(Declarator &D, QualType T, unsigned Skip) { 1370 DeclaratorInfo *DInfo = Context.CreateDeclaratorInfo(T); 1371 UnqualTypeLoc CurrTL = DInfo->getTypeLoc().getUnqualifiedLoc(); 1372 1373 for (unsigned i = Skip, e = D.getNumTypeObjects(); i != e; ++i) { 1374 DeclaratorLocFiller(D.getTypeObject(i)).Visit(CurrTL); 1375 CurrTL = CurrTL.getNextTypeLoc().getUnqualifiedLoc(); 1376 } 1377 1378 TypeSpecLocFiller(D.getDeclSpec()).Visit(CurrTL); 1379 1380 return DInfo; 1381} 1382 1383/// \brief Create a LocInfoType to hold the given QualType and DeclaratorInfo. 1384QualType Sema::CreateLocInfoType(QualType T, DeclaratorInfo *DInfo) { 1385 // FIXME: LocInfoTypes are "transient", only needed for passing to/from Parser 1386 // and Sema during declaration parsing. Try deallocating/caching them when 1387 // it's appropriate, instead of allocating them and keeping them around. 1388 LocInfoType *LocT = (LocInfoType*)BumpAlloc.Allocate(sizeof(LocInfoType), 8); 1389 new (LocT) LocInfoType(T, DInfo); 1390 assert(LocT->getTypeClass() != T->getTypeClass() && 1391 "LocInfoType's TypeClass conflicts with an existing Type class"); 1392 return QualType(LocT, 0); 1393} 1394 1395void LocInfoType::getAsStringInternal(std::string &Str, 1396 const PrintingPolicy &Policy) const { 1397 assert(false && "LocInfoType leaked into the type system; an opaque TypeTy*" 1398 " was used directly instead of getting the QualType through" 1399 " GetTypeFromParser"); 1400} 1401 1402/// ObjCGetTypeForMethodDefinition - Builds the type for a method definition 1403/// declarator 1404QualType Sema::ObjCGetTypeForMethodDefinition(DeclPtrTy D) { 1405 ObjCMethodDecl *MDecl = cast<ObjCMethodDecl>(D.getAs<Decl>()); 1406 QualType T = MDecl->getResultType(); 1407 llvm::SmallVector<QualType, 16> ArgTys; 1408 1409 // Add the first two invisible argument types for self and _cmd. 1410 if (MDecl->isInstanceMethod()) { 1411 QualType selfTy = Context.getObjCInterfaceType(MDecl->getClassInterface()); 1412 selfTy = Context.getPointerType(selfTy); 1413 ArgTys.push_back(selfTy); 1414 } else 1415 ArgTys.push_back(Context.getObjCIdType()); 1416 ArgTys.push_back(Context.getObjCSelType()); 1417 1418 for (ObjCMethodDecl::param_iterator PI = MDecl->param_begin(), 1419 E = MDecl->param_end(); PI != E; ++PI) { 1420 QualType ArgTy = (*PI)->getType(); 1421 assert(!ArgTy.isNull() && "Couldn't parse type?"); 1422 ArgTy = adjustParameterType(ArgTy); 1423 ArgTys.push_back(ArgTy); 1424 } 1425 T = Context.getFunctionType(T, &ArgTys[0], ArgTys.size(), 1426 MDecl->isVariadic(), 0); 1427 return T; 1428} 1429 1430/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 1431/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 1432/// they point to and return true. If T1 and T2 aren't pointer types 1433/// or pointer-to-member types, or if they are not similar at this 1434/// level, returns false and leaves T1 and T2 unchanged. Top-level 1435/// qualifiers on T1 and T2 are ignored. This function will typically 1436/// be called in a loop that successively "unwraps" pointer and 1437/// pointer-to-member types to compare them at each level. 1438bool Sema::UnwrapSimilarPointerTypes(QualType& T1, QualType& T2) { 1439 const PointerType *T1PtrType = T1->getAs<PointerType>(), 1440 *T2PtrType = T2->getAs<PointerType>(); 1441 if (T1PtrType && T2PtrType) { 1442 T1 = T1PtrType->getPointeeType(); 1443 T2 = T2PtrType->getPointeeType(); 1444 return true; 1445 } 1446 1447 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 1448 *T2MPType = T2->getAs<MemberPointerType>(); 1449 if (T1MPType && T2MPType && 1450 Context.getCanonicalType(T1MPType->getClass()) == 1451 Context.getCanonicalType(T2MPType->getClass())) { 1452 T1 = T1MPType->getPointeeType(); 1453 T2 = T2MPType->getPointeeType(); 1454 return true; 1455 } 1456 return false; 1457} 1458 1459Sema::TypeResult Sema::ActOnTypeName(Scope *S, Declarator &D) { 1460 // C99 6.7.6: Type names have no identifier. This is already validated by 1461 // the parser. 1462 assert(D.getIdentifier() == 0 && "Type name should have no identifier!"); 1463 1464 DeclaratorInfo *DInfo = 0; 1465 TagDecl *OwnedTag = 0; 1466 QualType T = GetTypeForDeclarator(D, S, &DInfo, /*Skip=*/0, &OwnedTag); 1467 if (D.isInvalidType()) 1468 return true; 1469 1470 if (getLangOptions().CPlusPlus) { 1471 // Check that there are no default arguments (C++ only). 1472 CheckExtraCXXDefaultArguments(D); 1473 1474 // C++0x [dcl.type]p3: 1475 // A type-specifier-seq shall not define a class or enumeration 1476 // unless it appears in the type-id of an alias-declaration 1477 // (7.1.3). 1478 if (OwnedTag && OwnedTag->isDefinition()) 1479 Diag(OwnedTag->getLocation(), diag::err_type_defined_in_type_specifier) 1480 << Context.getTypeDeclType(OwnedTag); 1481 } 1482 1483 if (DInfo) 1484 T = CreateLocInfoType(T, DInfo); 1485 1486 return T.getAsOpaquePtr(); 1487} 1488 1489 1490 1491//===----------------------------------------------------------------------===// 1492// Type Attribute Processing 1493//===----------------------------------------------------------------------===// 1494 1495/// HandleAddressSpaceTypeAttribute - Process an address_space attribute on the 1496/// specified type. The attribute contains 1 argument, the id of the address 1497/// space for the type. 1498static void HandleAddressSpaceTypeAttribute(QualType &Type, 1499 const AttributeList &Attr, Sema &S){ 1500 1501 // If this type is already address space qualified, reject it. 1502 // Clause 6.7.3 - Type qualifiers: "No type shall be qualified by qualifiers 1503 // for two or more different address spaces." 1504 if (Type.getAddressSpace()) { 1505 S.Diag(Attr.getLoc(), diag::err_attribute_address_multiple_qualifiers); 1506 return; 1507 } 1508 1509 // Check the attribute arguments. 1510 if (Attr.getNumArgs() != 1) { 1511 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; 1512 return; 1513 } 1514 Expr *ASArgExpr = static_cast<Expr *>(Attr.getArg(0)); 1515 llvm::APSInt addrSpace(32); 1516 if (!ASArgExpr->isIntegerConstantExpr(addrSpace, S.Context)) { 1517 S.Diag(Attr.getLoc(), diag::err_attribute_address_space_not_int) 1518 << ASArgExpr->getSourceRange(); 1519 return; 1520 } 1521 1522 // Bounds checking. 1523 if (addrSpace.isSigned()) { 1524 if (addrSpace.isNegative()) { 1525 S.Diag(Attr.getLoc(), diag::err_attribute_address_space_negative) 1526 << ASArgExpr->getSourceRange(); 1527 return; 1528 } 1529 addrSpace.setIsSigned(false); 1530 } 1531 llvm::APSInt max(addrSpace.getBitWidth()); 1532 max = Qualifiers::MaxAddressSpace; 1533 if (addrSpace > max) { 1534 S.Diag(Attr.getLoc(), diag::err_attribute_address_space_too_high) 1535 << Qualifiers::MaxAddressSpace << ASArgExpr->getSourceRange(); 1536 return; 1537 } 1538 1539 unsigned ASIdx = static_cast<unsigned>(addrSpace.getZExtValue()); 1540 Type = S.Context.getAddrSpaceQualType(Type, ASIdx); 1541} 1542 1543/// HandleObjCGCTypeAttribute - Process an objc's gc attribute on the 1544/// specified type. The attribute contains 1 argument, weak or strong. 1545static void HandleObjCGCTypeAttribute(QualType &Type, 1546 const AttributeList &Attr, Sema &S) { 1547 if (Type.getObjCGCAttr() != Qualifiers::GCNone) { 1548 S.Diag(Attr.getLoc(), diag::err_attribute_multiple_objc_gc); 1549 return; 1550 } 1551 1552 // Check the attribute arguments. 1553 if (!Attr.getParameterName()) { 1554 S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string) 1555 << "objc_gc" << 1; 1556 return; 1557 } 1558 Qualifiers::GC GCAttr; 1559 if (Attr.getNumArgs() != 0) { 1560 S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; 1561 return; 1562 } 1563 if (Attr.getParameterName()->isStr("weak")) 1564 GCAttr = Qualifiers::Weak; 1565 else if (Attr.getParameterName()->isStr("strong")) 1566 GCAttr = Qualifiers::Strong; 1567 else { 1568 S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported) 1569 << "objc_gc" << Attr.getParameterName(); 1570 return; 1571 } 1572 1573 Type = S.Context.getObjCGCQualType(Type, GCAttr); 1574} 1575 1576/// HandleNoReturnTypeAttribute - Process the noreturn attribute on the 1577/// specified type. The attribute contains 0 arguments. 1578static void HandleNoReturnTypeAttribute(QualType &Type, 1579 const AttributeList &Attr, Sema &S) { 1580 if (Attr.getNumArgs() != 0) 1581 return; 1582 1583 // We only apply this to a pointer to function or a pointer to block. 1584 if (!Type->isFunctionPointerType() 1585 && !Type->isBlockPointerType() 1586 && !Type->isFunctionType()) 1587 return; 1588 1589 Type = S.Context.getNoReturnType(Type); 1590} 1591 1592void Sema::ProcessTypeAttributeList(QualType &Result, const AttributeList *AL) { 1593 // Scan through and apply attributes to this type where it makes sense. Some 1594 // attributes (such as __address_space__, __vector_size__, etc) apply to the 1595 // type, but others can be present in the type specifiers even though they 1596 // apply to the decl. Here we apply type attributes and ignore the rest. 1597 for (; AL; AL = AL->getNext()) { 1598 // If this is an attribute we can handle, do so now, otherwise, add it to 1599 // the LeftOverAttrs list for rechaining. 1600 switch (AL->getKind()) { 1601 default: break; 1602 case AttributeList::AT_address_space: 1603 HandleAddressSpaceTypeAttribute(Result, *AL, *this); 1604 break; 1605 case AttributeList::AT_objc_gc: 1606 HandleObjCGCTypeAttribute(Result, *AL, *this); 1607 break; 1608 case AttributeList::AT_noreturn: 1609 HandleNoReturnTypeAttribute(Result, *AL, *this); 1610 break; 1611 } 1612 } 1613} 1614 1615/// @brief Ensure that the type T is a complete type. 1616/// 1617/// This routine checks whether the type @p T is complete in any 1618/// context where a complete type is required. If @p T is a complete 1619/// type, returns false. If @p T is a class template specialization, 1620/// this routine then attempts to perform class template 1621/// instantiation. If instantiation fails, or if @p T is incomplete 1622/// and cannot be completed, issues the diagnostic @p diag (giving it 1623/// the type @p T) and returns true. 1624/// 1625/// @param Loc The location in the source that the incomplete type 1626/// diagnostic should refer to. 1627/// 1628/// @param T The type that this routine is examining for completeness. 1629/// 1630/// @param PD The partial diagnostic that will be printed out if T is not a 1631/// complete type. 1632/// 1633/// @returns @c true if @p T is incomplete and a diagnostic was emitted, 1634/// @c false otherwise. 1635bool Sema::RequireCompleteType(SourceLocation Loc, QualType T, 1636 const PartialDiagnostic &PD, 1637 std::pair<SourceLocation, 1638 PartialDiagnostic> Note) { 1639 unsigned diag = PD.getDiagID(); 1640 1641 // FIXME: Add this assertion to make sure we always get instantiation points. 1642 // assert(!Loc.isInvalid() && "Invalid location in RequireCompleteType"); 1643 // FIXME: Add this assertion to help us flush out problems with 1644 // checking for dependent types and type-dependent expressions. 1645 // 1646 // assert(!T->isDependentType() && 1647 // "Can't ask whether a dependent type is complete"); 1648 1649 // If we have a complete type, we're done. 1650 if (!T->isIncompleteType()) 1651 return false; 1652 1653 // If we have a class template specialization or a class member of a 1654 // class template specialization, try to instantiate it. 1655 if (const RecordType *Record = T->getAs<RecordType>()) { 1656 if (ClassTemplateSpecializationDecl *ClassTemplateSpec 1657 = dyn_cast<ClassTemplateSpecializationDecl>(Record->getDecl())) { 1658 if (ClassTemplateSpec->getSpecializationKind() == TSK_Undeclared) { 1659 if (Loc.isValid()) 1660 ClassTemplateSpec->setPointOfInstantiation(Loc); 1661 return InstantiateClassTemplateSpecialization(ClassTemplateSpec, 1662 TSK_ImplicitInstantiation, 1663 /*Complain=*/diag != 0); 1664 } 1665 } else if (CXXRecordDecl *Rec 1666 = dyn_cast<CXXRecordDecl>(Record->getDecl())) { 1667 if (CXXRecordDecl *Pattern = Rec->getInstantiatedFromMemberClass()) { 1668 MemberSpecializationInfo *MSInfo = Rec->getMemberSpecializationInfo(); 1669 assert(MSInfo && "Missing member specialization information?"); 1670 // This record was instantiated from a class within a template. 1671 if (MSInfo->getTemplateSpecializationKind() 1672 != TSK_ExplicitSpecialization) { 1673 MSInfo->setPointOfInstantiation(Loc); 1674 return InstantiateClass(Loc, Rec, Pattern, 1675 getTemplateInstantiationArgs(Rec), 1676 TSK_ImplicitInstantiation, 1677 /*Complain=*/diag != 0); 1678 } 1679 } 1680 } 1681 } 1682 1683 if (diag == 0) 1684 return true; 1685 1686 // We have an incomplete type. Produce a diagnostic. 1687 Diag(Loc, PD) << T; 1688 1689 // If we have a note, produce it. 1690 if (!Note.first.isInvalid()) 1691 Diag(Note.first, Note.second); 1692 1693 // If the type was a forward declaration of a class/struct/union 1694 // type, produce 1695 const TagType *Tag = 0; 1696 if (const RecordType *Record = T->getAs<RecordType>()) 1697 Tag = Record; 1698 else if (const EnumType *Enum = T->getAs<EnumType>()) 1699 Tag = Enum; 1700 1701 if (Tag && !Tag->getDecl()->isInvalidDecl()) 1702 Diag(Tag->getDecl()->getLocation(), 1703 Tag->isBeingDefined() ? diag::note_type_being_defined 1704 : diag::note_forward_declaration) 1705 << QualType(Tag, 0); 1706 1707 return true; 1708} 1709 1710/// \brief Retrieve a version of the type 'T' that is qualified by the 1711/// nested-name-specifier contained in SS. 1712QualType Sema::getQualifiedNameType(const CXXScopeSpec &SS, QualType T) { 1713 if (!SS.isSet() || SS.isInvalid() || T.isNull()) 1714 return T; 1715 1716 NestedNameSpecifier *NNS 1717 = static_cast<NestedNameSpecifier *>(SS.getScopeRep()); 1718 return Context.getQualifiedNameType(NNS, T); 1719} 1720 1721QualType Sema::BuildTypeofExprType(Expr *E) { 1722 return Context.getTypeOfExprType(E); 1723} 1724 1725QualType Sema::BuildDecltypeType(Expr *E) { 1726 if (E->getType() == Context.OverloadTy) { 1727 Diag(E->getLocStart(), 1728 diag::err_cannot_determine_declared_type_of_overloaded_function); 1729 return QualType(); 1730 } 1731 return Context.getDecltypeType(E); 1732} 1733