SemaType.cpp revision f244cd7e54753caf6edb76df430dea2f43bb82a8
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- SemaType.cpp - Semantic Analysis for Types -----------------------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file implements type-related semantic analysis. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "Sema.h" 155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/ASTContext.h" 16980e508ca70d6de75d2abfd96b4681fc98bb2698Steve Naroff#include "clang/AST/DeclObjC.h" 17e91593ef084479340582b2ba177b44be50a717b7Daniel Dunbar#include "clang/AST/Expr.h" 18e4858a65a93fb36c099d8dd2ea0a98e33e77687eDaniel Dunbar#include "clang/Parse/DeclSpec.h" 195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 21930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor/// \brief Convert the specified declspec to the appropriate type 22930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor/// object. 23930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor/// \param DS the declaration specifiers 24930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor/// \returns The type described by the declaration specifiers, or NULL 25930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor/// if there was an error. 26fca0ddd42965e0b7ae821213486d4e0dd71fb439Chris LattnerQualType Sema::ConvertDeclSpecToType(const DeclSpec &DS) { 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: Should move the logic from DeclSpec::Finish to here for validity 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // checking. 29958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner QualType Result; 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (DS.getTypeSpecType()) { 32d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner default: assert(0 && "Unknown TypeSpecType!"); 3396b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner case DeclSpec::TST_void: 3496b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner Result = Context.VoidTy; 3596b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner break; 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_char: 375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified) 38fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.CharTy; 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed) 40fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.SignedCharTy; 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else { 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Unknown TSS value"); 44fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.UnsignedCharTy; 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 46958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 4764c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis case DeclSpec::TST_wchar: 4864c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified) 4964c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis Result = Context.WCharTy; 5064c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed) { 51f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec) 52f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner << DS.getSpecifierName(DS.getTypeSpecType()); 5364c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis Result = Context.getSignedWCharType(); 5464c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis } else { 5564c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && 5664c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis "Unknown TSS value"); 57f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec) 58f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner << DS.getSpecifierName(DS.getTypeSpecType()); 5964c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis Result = Context.getUnsignedWCharType(); 6064c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis } 6164c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis break; 62d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner case DeclSpec::TST_unspecified: 6362f5f7ffad57e0c2af2b308af3735351505937cbChris Lattner // "<proto1,proto2>" is an objc qualified ID with a missing id. 64097e916b617bb4a069a03764024c310ed42a6424Chris Lattner if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) { 65ae4da6150bb837311a2f0f958b01a2989066ba90Chris Lattner Result = Context.getObjCQualifiedIdType((ObjCProtocolDecl**)PQ, 6662f5f7ffad57e0c2af2b308af3735351505937cbChris Lattner DS.getNumProtocolQualifiers()); 6762f5f7ffad57e0c2af2b308af3735351505937cbChris Lattner break; 6862f5f7ffad57e0c2af2b308af3735351505937cbChris Lattner } 6962f5f7ffad57e0c2af2b308af3735351505937cbChris Lattner 70d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // Unspecified typespec defaults to int in C90. However, the C90 grammar 71d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // [C90 6.5] only allows a decl-spec if there was *some* type-specifier, 72d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // type-qualifier, or storage-class-specifier. If not, emit an extwarn. 73d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // Note that the one exception to this is function definitions, which are 74d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // allowed to be completely missing a declspec. This is handled in the 75d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // parser already though by it pretending to have seen an 'int' in this 76d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // case. 77d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner if (getLangOptions().ImplicitInt) { 78d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner if ((DS.getParsedSpecifiers() & (DeclSpec::PQ_StorageClassSpecifier | 79d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner DeclSpec::PQ_TypeSpecifier | 80d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner DeclSpec::PQ_TypeQualifier)) == 0) 81d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner Diag(DS.getSourceRange().getBegin(), diag::ext_missing_declspec); 82d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner } else { 83d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // C99 and C++ require a type specifier. For example, C99 6.7.2p2 says: 84d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // "At least one type specifier shall be given in the declaration 85d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // specifiers in each declaration, and in the specifier-qualifier list in 86d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // each struct declaration and type name." 87930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor // FIXME: this should be a hard error in C++ 88d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner if (!DS.hasTypeSpecifier()) 89d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner Diag(DS.getSourceRange().getBegin(), diag::ext_missing_type_specifier); 90d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner } 91d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner 92d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // FALL THROUGH. 933cbc38bd3569d37f53bd76fa89d24803f48f5036Chris Lattner case DeclSpec::TST_int: { 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getTypeSpecSign() != DeclSpec::TSS_unsigned) { 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (DS.getTypeSpecWidth()) { 96fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_unspecified: Result = Context.IntTy; break; 97fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_short: Result = Context.ShortTy; break; 98fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_long: Result = Context.LongTy; break; 99fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_longlong: Result = Context.LongLongTy; break; 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (DS.getTypeSpecWidth()) { 103fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_unspecified: Result = Context.UnsignedIntTy; break; 104fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_short: Result = Context.UnsignedShortTy; break; 105fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_long: Result = Context.UnsignedLongTy; break; 106fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_longlong: Result =Context.UnsignedLongLongTy; break; 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 109958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 1103cbc38bd3569d37f53bd76fa89d24803f48f5036Chris Lattner } 111fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TST_float: Result = Context.FloatTy; break; 112958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner case DeclSpec::TST_double: 113958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner if (DS.getTypeSpecWidth() == DeclSpec::TSW_long) 114fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.LongDoubleTy; 115958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner else 116fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.DoubleTy; 117958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 118fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TST_bool: Result = Context.BoolTy; break; // _Bool or bool 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_decimal32: // _Decimal32 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_decimal64: // _Decimal64 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_decimal128: // _Decimal128 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(0 && "FIXME: GNU decimal extensions not supported yet!"); 12399dc91422144483c20d1c7381bc9ac634b646b04Chris Lattner case DeclSpec::TST_class: 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_enum: 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_union: 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_struct: { 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Decl *D = static_cast<Decl *>(DS.getTypeRep()); 12899dc91422144483c20d1c7381bc9ac634b646b04Chris Lattner assert(D && "Didn't get a decl for a class/enum/union/struct?"); 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getTypeSpecSign() == 0 && 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Can't handle qualifiers on typedef names yet!"); 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TypeQuals handled by caller. 1332ce52f3fb95bf544db6bd3d91a72bce7d9cceb6cDouglas Gregor Result = Context.getTypeDeclType(cast<TypeDecl>(D)); 134958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1361a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor case DeclSpec::TST_typename: { 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getTypeSpecSign() == 0 && 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Can't handle qualifiers on typedef names yet!"); 1401a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor Result = QualType::getFromOpaquePtr(DS.getTypeRep()); 1412ce52f3fb95bf544db6bd3d91a72bce7d9cceb6cDouglas Gregor 1421a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) { 1431a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor // FIXME: Adding a TST_objcInterface clause doesn't seem ideal, so 1441a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor // we have this "hack" for now... 1451a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor if (const ObjCInterfaceType *Interface = Result->getAsObjCInterfaceType()) 1461a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor Result = Context.getObjCQualifiedInterfaceType(Interface->getDecl(), 1471a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor (ObjCProtocolDecl**)PQ, 1481a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor DS.getNumProtocolQualifiers()); 1491a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor else if (Result == Context.getObjCIdType()) 150ae4da6150bb837311a2f0f958b01a2989066ba90Chris Lattner // id<protocol-list> 151ae4da6150bb837311a2f0f958b01a2989066ba90Chris Lattner Result = Context.getObjCQualifiedIdType((ObjCProtocolDecl**)PQ, 152ae4da6150bb837311a2f0f958b01a2989066ba90Chris Lattner DS.getNumProtocolQualifiers()); 153c569249ca0ab755ac79d8cbbfcb2bcae19743624Fariborz Jahanian } 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TypeQuals handled by caller. 155958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 157958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner case DeclSpec::TST_typeofType: 158958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner Result = QualType::getFromOpaquePtr(DS.getTypeRep()); 159958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner assert(!Result.isNull() && "Didn't get a type for typeof?"); 160d1861fd633d5096a00777c918eb8575ea7162fe7Steve Naroff // TypeQuals handled by caller. 161fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.getTypeOfType(Result); 162958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 163d1861fd633d5096a00777c918eb8575ea7162fe7Steve Naroff case DeclSpec::TST_typeofExpr: { 164d1861fd633d5096a00777c918eb8575ea7162fe7Steve Naroff Expr *E = static_cast<Expr *>(DS.getTypeRep()); 165d1861fd633d5096a00777c918eb8575ea7162fe7Steve Naroff assert(E && "Didn't get an expression for typeof?"); 166d1861fd633d5096a00777c918eb8575ea7162fe7Steve Naroff // TypeQuals handled by caller. 167fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.getTypeOfExpr(E); 168958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 169d1861fd633d5096a00777c918eb8575ea7162fe7Steve Naroff } 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 171958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner 172958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner // Handle complex types. 173f244cd7e54753caf6edb76df430dea2f43bb82a8Douglas Gregor if (DS.getTypeSpecComplex() == DeclSpec::TSC_complex) { 174f244cd7e54753caf6edb76df430dea2f43bb82a8Douglas Gregor if (getLangOptions().Freestanding) 175f244cd7e54753caf6edb76df430dea2f43bb82a8Douglas Gregor Diag(DS.getTypeSpecComplexLoc(), diag::ext_freestanding_complex); 176fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.getComplexType(Result); 177f244cd7e54753caf6edb76df430dea2f43bb82a8Douglas Gregor } 178958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner 179958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner assert(DS.getTypeSpecComplex() != DeclSpec::TSC_imaginary && 180958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner "FIXME: imaginary types not supported yet!"); 181958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner 18238d8b98803ac354dba15578d65ea99a83dead046Chris Lattner // See if there are any attributes on the declspec that apply to the type (as 18338d8b98803ac354dba15578d65ea99a83dead046Chris Lattner // opposed to the decl). 184fca0ddd42965e0b7ae821213486d4e0dd71fb439Chris Lattner if (const AttributeList *AL = DS.getAttributes()) 185c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner ProcessTypeAttributeList(Result, AL); 186f1d705c3e2276f7f5b97b8b3394b9b3068fdf25bChris Lattner 18796b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Apply const/volatile/restrict qualifiers to T. 18896b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if (unsigned TypeQuals = DS.getTypeQualifiers()) { 18996b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner 19096b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Enforce C99 6.7.3p2: "Types other than pointer types derived from object 19196b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // or incomplete types shall not be restrict-qualified." C++ also allows 19296b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // restrict-qualified references. 19396b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if (TypeQuals & QualType::Restrict) { 194bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner if (const PointerLikeType *PT = Result->getAsPointerLikeType()) { 195bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner QualType EltTy = PT->getPointeeType(); 196bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner 197bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner // If we have a pointer or reference, the pointee must have an object or 198bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner // incomplete type. 199bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner if (!EltTy->isIncompleteOrObjectType()) { 200bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner Diag(DS.getRestrictSpecLoc(), 201d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner diag::err_typecheck_invalid_restrict_invalid_pointee) 202d162584991885ab004a02573a73ce06422b921fcChris Lattner << EltTy << DS.getSourceRange(); 203bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner TypeQuals &= ~QualType::Restrict; // Remove the restrict qualifier. 204bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner } 205bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner } else { 20696b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner Diag(DS.getRestrictSpecLoc(), 207d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner diag::err_typecheck_invalid_restrict_not_pointer) 208d162584991885ab004a02573a73ce06422b921fcChris Lattner << Result << DS.getSourceRange(); 209bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner TypeQuals &= ~QualType::Restrict; // Remove the restrict qualifier. 21096b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner } 21196b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner } 21296b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner 21396b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Warn about CV qualifiers on functions: C99 6.7.3p8: "If the specification 21496b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // of a function type includes any type qualifiers, the behavior is 21596b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // undefined." 21696b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if (Result->isFunctionType() && TypeQuals) { 21796b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Get some location to point at, either the C or V location. 21896b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner SourceLocation Loc; 21996b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if (TypeQuals & QualType::Const) 22096b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner Loc = DS.getConstSpecLoc(); 22196b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner else { 22296b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner assert((TypeQuals & QualType::Volatile) && 22396b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner "Has CV quals but not C or V?"); 22496b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner Loc = DS.getVolatileSpecLoc(); 22596b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner } 226d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, diag::warn_typecheck_function_qualifiers) 227d162584991885ab004a02573a73ce06422b921fcChris Lattner << Result << DS.getSourceRange(); 22896b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner } 22996b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner 230f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // C++ [dcl.ref]p1: 231f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // Cv-qualified references are ill-formed except when the 232f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // cv-qualifiers are introduced through the use of a typedef 233f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // (7.1.3) or of a template type argument (14.3), in which 234f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // case the cv-qualifiers are ignored. 2351a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor // FIXME: Shouldn't we be checking SCS_typedef here? 2361a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor if (DS.getTypeSpecType() == DeclSpec::TST_typename && 237f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor TypeQuals && Result->isReferenceType()) { 238f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor TypeQuals &= ~QualType::Const; 239f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor TypeQuals &= ~QualType::Volatile; 240f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor } 241f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor 24296b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner Result = Result.getQualifiedType(TypeQuals); 24396b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner } 244f1d705c3e2276f7f5b97b8b3394b9b3068fdf25bChris Lattner return Result; 245f1d705c3e2276f7f5b97b8b3394b9b3068fdf25bChris Lattner} 246f1d705c3e2276f7f5b97b8b3394b9b3068fdf25bChris Lattner 24798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump/// GetTypeForDeclarator - Convert the type for the specified 24898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump/// declarator to Type instances. Skip the outermost Skip type 24998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump/// objects. 250cee63fbf0e64ac526582312bf8cf33263fc5c16eSebastian RedlQualType Sema::GetTypeForDeclarator(Declarator &D, Scope *S, unsigned Skip) { 25198eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump bool OmittedReturnType = false; 25298eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump 25398eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (D.getContext() == Declarator::BlockLiteralContext 25498eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump && Skip == 0 25598eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump && !D.getDeclSpec().hasTypeSpecifier() 25698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump && (D.getNumTypeObjects() == 0 25798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump || (D.getNumTypeObjects() == 1 25898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump && D.getTypeObject(0).Kind == DeclaratorChunk::Function))) 25998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump OmittedReturnType = true; 26098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump 261b23deda7333cfc2316c989d10745c145dfbea6d6Chris Lattner // long long is a C99 feature. 262d1eb332181f02a7e0a6f9749265e6a0f55555cd4Chris Lattner if (!getLangOptions().C99 && !getLangOptions().CPlusPlus0x && 263b23deda7333cfc2316c989d10745c145dfbea6d6Chris Lattner D.getDeclSpec().getTypeSpecWidth() == DeclSpec::TSW_longlong) 264b23deda7333cfc2316c989d10745c145dfbea6d6Chris Lattner Diag(D.getDeclSpec().getTypeSpecWidthLoc(), diag::ext_longlong); 265930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor 266930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor // Determine the type of the declarator. Not all forms of declarator 267930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor // have a type. 268930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor QualType T; 269930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor switch (D.getKind()) { 270930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor case Declarator::DK_Abstract: 271930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor case Declarator::DK_Normal: 27298eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump case Declarator::DK_Operator: { 27398eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump const DeclSpec& DS = D.getDeclSpec(); 27498eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (OmittedReturnType) 27598eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // We default to a dependent type initially. Can be modified by 27698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // the first return statement. 27798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump T = Context.DependentTy; 27898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump else 27998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump T = ConvertDeclSpecToType(DS); 280930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor break; 28198eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 282930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor 283930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor case Declarator::DK_Constructor: 284930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor case Declarator::DK_Destructor: 285930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor case Declarator::DK_Conversion: 286930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor // Constructors and destructors don't have return types. Use 287930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor // "void" instead. Conversion operators will check their return 288930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor // types separately. 289930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor T = Context.VoidTy; 290930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor break; 291930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor } 2924c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl 29398eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // Walk the DeclTypeInfo, building the recursive type as we go. 29498eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // DeclTypeInfos are ordered from the identifier out, which is 29598eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // opposite of what we want :). 296cee63fbf0e64ac526582312bf8cf33263fc5c16eSebastian Redl for (unsigned i = Skip, e = D.getNumTypeObjects(); i != e; ++i) { 297cee63fbf0e64ac526582312bf8cf33263fc5c16eSebastian Redl DeclaratorChunk &DeclType = D.getTypeObject(e-i-1+Skip); 2985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (DeclType.Kind) { 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: assert(0 && "Unknown decltype!"); 3005618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff case DeclaratorChunk::BlockPointer: 3015618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff if (DeclType.Cls.TypeQuals) 3025618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff Diag(D.getIdentifierLoc(), diag::err_qualified_block_pointer_type); 3035618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff if (!T.getTypePtr()->isFunctionType()) 3045618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff Diag(D.getIdentifierLoc(), diag::err_nonfunction_block_type); 3055618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff else 3065618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff T = Context.getBlockPointerType(T); 3075618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff break; 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclaratorChunk::Pointer: 30902c642e8f40562fcc9d440977f232c021b9d4353Chris Lattner if (T->isReferenceType()) { 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C++ 8.3.2p4: There shall be no ... pointers to references ... 311d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(DeclType.Loc, diag::err_illegal_decl_pointer_to_reference) 312d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name"); 313e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff D.setInvalidType(true); 3145265af5b555f703be365dbc32c4e518fe38d4d9aChris Lattner T = Context.IntTy; 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 31796b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Enforce C99 6.7.3p2: "Types other than pointer types derived from 31896b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // object or incomplete types shall not be restrict-qualified." 31996b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if ((DeclType.Ptr.TypeQuals & QualType::Restrict) && 320d805bec0fbb98aa10abbb41bfdcb2e2fab1bac96Chris Lattner !T->isIncompleteOrObjectType()) { 321d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(DeclType.Loc, diag::err_typecheck_invalid_restrict_invalid_pointee) 322d162584991885ab004a02573a73ce06422b921fcChris Lattner << T; 323f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl DeclType.Ptr.TypeQuals &= ~QualType::Restrict; 324f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 325f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl 3265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Apply the pointer typequals to the pointer object. 3275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer T = Context.getPointerType(T).getQualifiedType(DeclType.Ptr.TypeQuals); 3285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 329f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor case DeclaratorChunk::Reference: { 330f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // Whether we should suppress the creation of the reference. 331f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor bool SuppressReference = false; 332f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor if (T->isReferenceType()) { 333f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // C++ [dcl.ref]p4: There shall be no references to references. 334f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // 335f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // According to C++ DR 106, references to references are only 336f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // diagnosed when they are written directly (e.g., "int & &"), 337f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // but not when they happen via a typedef: 338f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // 339f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // typedef int& intref; 340f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // typedef intref& intref2; 341f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // 342f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // Parser::ParserDeclaratorInternal diagnoses the case where 343f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // references are written directly; here, we handle the 344f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // collapsing of references-to-references as described in C++ 345f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // DR 106 and amended by C++ DR 540. 346f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor SuppressReference = true; 347f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor } 348f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor 349f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // C++ [dcl.ref]p1: 350f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // A declarator that specifies the type “reference to cv void” 351f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // is ill-formed. 352f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor if (T->isVoidType()) { 353f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor Diag(DeclType.Loc, diag::err_reference_to_void); 354e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff D.setInvalidType(true); 355f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor T = Context.IntTy; 3565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 35896b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Enforce C99 6.7.3p2: "Types other than pointer types derived from 35996b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // object or incomplete types shall not be restrict-qualified." 36096b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if (DeclType.Ref.HasRestrict && 361d805bec0fbb98aa10abbb41bfdcb2e2fab1bac96Chris Lattner !T->isIncompleteOrObjectType()) { 362d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(DeclType.Loc, diag::err_typecheck_invalid_restrict_invalid_pointee) 363d162584991885ab004a02573a73ce06422b921fcChris Lattner << T; 36496b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner DeclType.Ref.HasRestrict = false; 36596b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner } 36696b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner 367f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor if (!SuppressReference) 368f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor T = Context.getReferenceType(T); 36996b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner 37096b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Handle restrict on references. 37196b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if (DeclType.Ref.HasRestrict) 37296b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner T.addRestrict(); 3735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 374f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor } 3755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclaratorChunk::Array: { 376fd89bc825026e44c68a68db72d4012fd6752e70fChris Lattner DeclaratorChunk::ArrayTypeInfo &ATI = DeclType.Arr; 37794f81fd0b0f81a99d215b225c8c5616295b063f6Chris Lattner Expr *ArraySize = static_cast<Expr*>(ATI.NumElts); 3785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ArrayType::ArraySizeModifier ASM; 3795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ATI.isStar) 3805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ASM = ArrayType::Star; 3815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else if (ATI.hasStatic) 3825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ASM = ArrayType::Static; 3835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 3845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ASM = ArrayType::Normal; 3855265af5b555f703be365dbc32c4e518fe38d4d9aChris Lattner 3865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.5.2p1: If the element type is an incomplete or function type, 3875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // reject it (e.g. void ary[7], struct foo ary[7], void ary[7]()) 3884ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor if (DiagnoseIncompleteType(D.getIdentifierLoc(), T, 3894ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor diag::err_illegal_decl_array_incomplete_type)) { 390e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff T = Context.IntTy; 391e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff D.setInvalidType(true); 3925265af5b555f703be365dbc32c4e518fe38d4d9aChris Lattner } else if (T->isFunctionType()) { 393d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(D.getIdentifierLoc(), diag::err_illegal_decl_array_of_functions) 394d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name"); 395e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff T = Context.getPointerType(T); 396e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff D.setInvalidType(true); 397a1d9fdea79ba7bbd71862b9f9f78f5f117331fc7Chris Lattner } else if (const ReferenceType *RT = T->getAsReferenceType()) { 3985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C++ 8.3.2p4: There shall be no ... arrays of references ... 399d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(D.getIdentifierLoc(), diag::err_illegal_decl_array_of_references) 400d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name"); 401bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner T = RT->getPointeeType(); 402e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff D.setInvalidType(true); 40302c642e8f40562fcc9d440977f232c021b9d4353Chris Lattner } else if (const RecordType *EltTy = T->getAsRecordType()) { 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the element type is a struct or union that contains a variadic 4050bfe54fdc83b7b4e37c40e652d86d15aa89885b2Douglas Gregor // array, accept it as a GNU extension: C99 6.7.2.1p2. 4060bfe54fdc83b7b4e37c40e652d86d15aa89885b2Douglas Gregor if (EltTy->getDecl()->hasFlexibleArrayMember()) 4070bfe54fdc83b7b4e37c40e652d86d15aa89885b2Douglas Gregor Diag(DeclType.Loc, diag::ext_flexible_array_in_array) << T; 40843477ca46792311640cf29b7cff731e29bebb146Chris Lattner } else if (T->isObjCInterfaceType()) { 409d162584991885ab004a02573a73ce06422b921fcChris Lattner Diag(DeclType.Loc, diag::warn_objc_array_of_interfaces) << T; 4105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 41143477ca46792311640cf29b7cff731e29bebb146Chris Lattner 41242471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff // C99 6.7.5.2p1: The size expression shall have integer type. 41342471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff if (ArraySize && !ArraySize->getType()->isIntegerType()) { 414d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(ArraySize->getLocStart(), diag::err_array_size_non_int) 415d162584991885ab004a02573a73ce06422b921fcChris Lattner << ArraySize->getType() << ArraySize->getSourceRange(); 41642471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff D.setInvalidType(true); 417169a2664a64b57a815b5f0b39276a0891663921aTed Kremenek ArraySize->Destroy(Context); 418fd89bc825026e44c68a68db72d4012fd6752e70fChris Lattner ATI.NumElts = ArraySize = 0; 41942471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff } 420c9406125e2cac9208098655ac8058c095c2c3a65Steve Naroff llvm::APSInt ConstVal(32); 421c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman if (!ArraySize) { 422c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman T = Context.getIncompleteArrayType(T, ASM, ATI.TypeQuals); 423898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } else if (ArraySize->isValueDependent()) { 424898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor T = Context.getDependentSizedArrayType(T, ArraySize, ASM, ATI.TypeQuals); 42537148aabe7d153ce682b5715a820a11c0bbfcd59Eli Friedman } else if (!ArraySize->isIntegerConstantExpr(ConstVal, Context) || 426cee63fbf0e64ac526582312bf8cf33263fc5c16eSebastian Redl !T->isConstantSizeType()) { 42737148aabe7d153ce682b5715a820a11c0bbfcd59Eli Friedman // Per C99, a variable array is an array with either a non-constant 42837148aabe7d153ce682b5715a820a11c0bbfcd59Eli Friedman // size or an element type that has a non-constant-size 429c9406125e2cac9208098655ac8058c095c2c3a65Steve Naroff T = Context.getVariableArrayType(T, ArraySize, ASM, ATI.TypeQuals); 430c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman } else { 43142471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff // C99 6.7.5.2p1: If the expression is a constant expression, it shall 43242471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff // have a value greater than zero. 43342471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff if (ConstVal.isSigned()) { 43442471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff if (ConstVal.isNegative()) { 435dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ArraySize->getLocStart(), 436dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_typecheck_negative_array_size) 437dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << ArraySize->getSourceRange(); 43842471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff D.setInvalidType(true); 43942471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff } else if (ConstVal == 0) { 44042471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff // GCC accepts zero sized static arrays. 441dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ArraySize->getLocStart(), diag::ext_typecheck_zero_array_size) 442dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << ArraySize->getSourceRange(); 44342471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff } 44442471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff } 445c9406125e2cac9208098655ac8058c095c2c3a65Steve Naroff T = Context.getConstantArrayType(T, ConstVal, ASM, ATI.TypeQuals); 44642471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff } 44794f81fd0b0f81a99d215b225c8c5616295b063f6Chris Lattner // If this is not C99, extwarn about VLA's and C99 array size modifiers. 448a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner if (!getLangOptions().C99) { 449a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner if (ArraySize && !ArraySize->isValueDependent() && 450a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner !ArraySize->isIntegerConstantExpr(Context)) 451a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner Diag(D.getIdentifierLoc(), diag::ext_vla); 452a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner else if (ASM != ArrayType::Normal || ATI.TypeQuals != 0) 453a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner Diag(D.getIdentifierLoc(), diag::ext_c99_array_usage); 454a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner } 4555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 4565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 457f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl case DeclaratorChunk::Function: { 4585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the function declarator has a prototype (i.e. it is not () and 4595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // does not have a K&R-style identifier list), then the arguments are part 4605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // of the type, otherwise the argument list is (). 4615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun; 46268cfd49ea35d9101da9e6d4d5642263c9e95f1a4Chris Lattner 463cd8812948bc8a65dcf10c541c1775e5ba44def6cChris Lattner // C99 6.7.5.3p1: The return type may not be a function or array type. 46468cfd49ea35d9101da9e6d4d5642263c9e95f1a4Chris Lattner if (T->isArrayType() || T->isFunctionType()) { 465d162584991885ab004a02573a73ce06422b921fcChris Lattner Diag(DeclType.Loc, diag::err_func_returning_array_function) << T; 466cd8812948bc8a65dcf10c541c1775e5ba44def6cChris Lattner T = Context.IntTy; 467cd8812948bc8a65dcf10c541c1775e5ba44def6cChris Lattner D.setInvalidType(true); 468cd8812948bc8a65dcf10c541c1775e5ba44def6cChris Lattner } 469cd8812948bc8a65dcf10c541c1775e5ba44def6cChris Lattner 470eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman if (FTI.NumArgs == 0) { 471c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 472c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis // C++ 8.3.5p2: If the parameter-declaration-clause is empty, the 473c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis // function takes no arguments. 474971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis T = Context.getFunctionType(T, NULL, 0, FTI.isVariadic,FTI.TypeQuals); 475c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis } else { 476c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis // Simple void foo(), where the incoming T is the result type. 477c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis T = Context.getFunctionTypeNoProto(T); 478c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis } 479eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman } else if (FTI.ArgInfo[0].Param == 0) { 4805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.5.3p3: Reject int(x,y,z) when it's not a function definition. 481eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman Diag(FTI.ArgInfo[0].IdentLoc, diag::err_ident_list_in_fn_declaration); 4825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 4835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, we have a function with an argument list that is 4845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // potentially variadic. 4855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::SmallVector<QualType, 16> ArgTys; 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) { 4888123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner ParmVarDecl *Param = (ParmVarDecl *)FTI.ArgInfo[i].Param; 4898123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner QualType ArgTy = Param->getType(); 49078c75fb3d275079c5fab30eeb33077958f2b0265Chris Lattner assert(!ArgTy.isNull() && "Couldn't parse type?"); 49108d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // 49208d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // Perform the default function/array conversion (C99 6.7.5.3p[7,8]). 49308d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // This matches the conversion that is done in 494bff5f5cfd194c3cc096ba89360fb537814a9666aNate Begeman // Sema::ActOnParamDeclarator(). Without this conversion, the 49508d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // argument type in the function prototype *will not* match the 49608d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // type in ParmVarDecl (which makes the code generator unhappy). 49708d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // 49808d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // FIXME: We still apparently need the conversion in 499e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner // Sema::ActOnParamDeclarator(). This doesn't make any sense, since 50008d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // it should be driving off the type being created here. 50108d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // 50208d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // FIXME: If a source translation tool needs to see the original type, 50308d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // then we need to consider storing both types somewhere... 50408d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // 505e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner if (ArgTy->isArrayType()) { 506e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner ArgTy = Context.getArrayDecayedType(ArgTy); 507529bd02affa96a311dd9ab131f2ab4d833017fb7Chris Lattner } else if (ArgTy->isFunctionType()) 50808d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff ArgTy = Context.getPointerType(ArgTy); 509e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner 5105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look for 'void'. void is allowed only as a single argument to a 5115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // function with no other parameters (C99 6.7.5.3p10). We record 5125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // int(void) as a FunctionTypeProto with an empty argument list. 51308d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff else if (ArgTy->isVoidType()) { 5145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is something like 'float(int, void)', reject it. 'void' 5155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // is an incomplete type (C99 6.2.5p19) and function decls cannot 5165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // have arguments of incomplete type. 5175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FTI.NumArgs != 1 || FTI.isVariadic) { 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DeclType.Loc, diag::err_void_only_param); 5192ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner ArgTy = Context.IntTy; 5208123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner Param->setType(ArgTy); 5212ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner } else if (FTI.ArgInfo[i].Ident) { 5222ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner // Reject, but continue to parse 'int(void abc)'. 5235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(FTI.ArgInfo[i].IdentLoc, 5244565d4e83cec55356fe9c75929579eacced9da36Chris Lattner diag::err_param_with_void_type); 5252ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner ArgTy = Context.IntTy; 5268123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner Param->setType(ArgTy); 5272ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner } else { 5282ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner // Reject, but continue to parse 'float(const void)'. 529f46699ce225811d8d9dbab9d00189a0e54469457Chris Lattner if (ArgTy.getCVRQualifiers()) 5302ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner Diag(DeclType.Loc, diag::err_void_param_qualified); 5312ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner 5322ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner // Do not add 'void' to the ArgTys list. 5332ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner break; 5342ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner } 535eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman } else if (!FTI.hasPrototype) { 536eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman if (ArgTy->isPromotableIntegerType()) { 537eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman ArgTy = Context.IntTy; 538eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman } else if (const BuiltinType* BTy = ArgTy->getAsBuiltinType()) { 539eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman if (BTy->getKind() == BuiltinType::Float) 540eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman ArgTy = Context.DoubleTy; 541eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman } 5425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ArgTys.push_back(ArgTy); 5455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer T = Context.getFunctionType(T, &ArgTys[0], ArgTys.size(), 547971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis FTI.isVariadic, FTI.TypeQuals); 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 5505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 551f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl case DeclaratorChunk::MemberPointer: 552f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // The scope spec must refer to a class, or be dependent. 553f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl DeclContext *DC = static_cast<DeclContext*>( 554f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl DeclType.Mem.Scope().getScopeRep()); 555f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl QualType ClsType; 556f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // FIXME: Extend for dependent types when it's actually supported. 557f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // See ActOnCXXNestedNameSpecifier. 558f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl if (CXXRecordDecl *RD = dyn_cast_or_null<CXXRecordDecl>(DC)) { 559f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl ClsType = Context.getTagDeclType(RD); 560f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } else { 561f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl if (DC) { 562f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl Diag(DeclType.Mem.Scope().getBeginLoc(), 563f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl diag::err_illegal_decl_mempointer_in_nonclass) 564f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name") 565f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl << DeclType.Mem.Scope().getRange(); 566f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 567f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl D.setInvalidType(true); 568f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl ClsType = Context.IntTy; 569f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 570f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl 571f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // C++ 8.3.3p3: A pointer to member shall not pointer to ... a member 572f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // with reference type, or "cv void." 573f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl if (T->isReferenceType()) { 574f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl Diag(DeclType.Loc, diag::err_illegal_decl_pointer_to_reference) 575f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name"); 576f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl D.setInvalidType(true); 577f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl T = Context.IntTy; 578f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 579f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl if (T->isVoidType()) { 580f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl Diag(DeclType.Loc, diag::err_illegal_decl_mempointer_to_void) 581f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name"); 582f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl T = Context.IntTy; 583f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 584f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl 585f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // Enforce C99 6.7.3p2: "Types other than pointer types derived from 586f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // object or incomplete types shall not be restrict-qualified." 587f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl if ((DeclType.Mem.TypeQuals & QualType::Restrict) && 588f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl !T->isIncompleteOrObjectType()) { 589f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl Diag(DeclType.Loc, diag::err_typecheck_invalid_restrict_invalid_pointee) 590f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl << T; 591f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl DeclType.Mem.TypeQuals &= ~QualType::Restrict; 592f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 593f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl 5944433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl T = Context.getMemberPointerType(T, ClsType.getTypePtr()). 5954433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl getQualifiedType(DeclType.Mem.TypeQuals); 596f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl 597f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl break; 598f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 599f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl 600c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // See if there are any attributes on this declarator chunk. 601c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner if (const AttributeList *AL = DeclType.getAttrs()) 602c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner ProcessTypeAttributeList(T, AL); 6035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 604971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis 605971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis if (getLangOptions().CPlusPlus && T->isFunctionType()) { 606971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis const FunctionTypeProto *FnTy = T->getAsFunctionTypeProto(); 607971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis assert(FnTy && "Why oh why is there not a FunctionTypeProto here ?"); 608971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis 609971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis // C++ 8.3.5p4: A cv-qualifier-seq shall only be part of the function type 610971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis // for a nonstatic member function, the function type to which a pointer 611971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis // to member refers, or the top-level function type of a function typedef 612971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis // declaration. 613971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis if (FnTy->getTypeQuals() != 0 && 614971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && 615584049d49d956add7bce5669e9823491f7d8de78Douglas Gregor ((D.getContext() != Declarator::MemberContext && 616584049d49d956add7bce5669e9823491f7d8de78Douglas Gregor (!D.getCXXScopeSpec().isSet() || 617584049d49d956add7bce5669e9823491f7d8de78Douglas Gregor !static_cast<DeclContext*>(D.getCXXScopeSpec().getScopeRep()) 618bcbffc46f1ad3796c4582fa1e3a9113b5aa26061Douglas Gregor ->isRecord())) || 619971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static)) { 620971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis if (D.isFunctionDeclarator()) 621971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis Diag(D.getIdentifierLoc(), diag::err_invalid_qualified_function_type); 622971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis else 623971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis Diag(D.getIdentifierLoc(), 624971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis diag::err_invalid_qualified_typedef_function_type_use); 625971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis 626971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis // Strip the cv-quals from the type. 627971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis T = Context.getFunctionType(FnTy->getResultType(), FnTy->arg_type_begin(), 6287fb5e4888221cd36652d078c6b171ac55e7f406dArgyrios Kyrtzidis FnTy->getNumArgs(), FnTy->isVariadic(), 0); 629971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis } 630971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis } 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6320bf29ad534c381087e89efadbf7aff0579bf259fChris Lattner // If there were any type attributes applied to the decl itself (not the 6330bf29ad534c381087e89efadbf7aff0579bf259fChris Lattner // type, apply the type attribute to the type!) 6340bf29ad534c381087e89efadbf7aff0579bf259fChris Lattner if (const AttributeList *Attrs = D.getAttributes()) 635c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner ProcessTypeAttributeList(T, Attrs); 6360bf29ad534c381087e89efadbf7aff0579bf259fChris Lattner 6375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return T; 6385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 640a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek/// ObjCGetTypeForMethodDefinition - Builds the type for a method definition 641360300ca2ee298d585d29baf006519507d968812Fariborz Jahanian/// declarator 642a526c5c67e5a0473c340903ee542ce570119665fTed KremenekQualType Sema::ObjCGetTypeForMethodDefinition(DeclTy *D) { 643a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCMethodDecl *MDecl = dyn_cast<ObjCMethodDecl>(static_cast<Decl *>(D)); 644306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian QualType T = MDecl->getResultType(); 645306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian llvm::SmallVector<QualType, 16> ArgTys; 646306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian 6473560002bed2be6b428f1a909c489a8857b4417c7Fariborz Jahanian // Add the first two invisible argument types for self and _cmd. 648f8d49f64ef6ab7e632717a31631fc289aab69428Douglas Gregor if (MDecl->isInstanceMethod()) { 649a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek QualType selfTy = Context.getObjCInterfaceType(MDecl->getClassInterface()); 6501f7b6f88f18d7f6b10265acec5d41c4ed1897487Fariborz Jahanian selfTy = Context.getPointerType(selfTy); 6511f7b6f88f18d7f6b10265acec5d41c4ed1897487Fariborz Jahanian ArgTys.push_back(selfTy); 6521f7b6f88f18d7f6b10265acec5d41c4ed1897487Fariborz Jahanian } 6533560002bed2be6b428f1a909c489a8857b4417c7Fariborz Jahanian else 654a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ArgTys.push_back(Context.getObjCIdType()); 655a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ArgTys.push_back(Context.getObjCSelType()); 6563560002bed2be6b428f1a909c489a8857b4417c7Fariborz Jahanian 65758cce3b0dcbdcc95b7e713795834b4cb2c8a008aChris Lattner for (int i = 0, e = MDecl->getNumParams(); i != e; ++i) { 658306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian ParmVarDecl *PDecl = MDecl->getParamDecl(i); 659306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian QualType ArgTy = PDecl->getType(); 660306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian assert(!ArgTy.isNull() && "Couldn't parse type?"); 661306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian // Perform the default function/array conversion (C99 6.7.5.3p[7,8]). 662306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian // This matches the conversion that is done in 663e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner // Sema::ActOnParamDeclarator(). 664e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner if (ArgTy->isArrayType()) 665e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner ArgTy = Context.getArrayDecayedType(ArgTy); 666306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian else if (ArgTy->isFunctionType()) 667306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian ArgTy = Context.getPointerType(ArgTy); 668306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian ArgTys.push_back(ArgTy); 669306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian } 670306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian T = Context.getFunctionType(T, &ArgTys[0], ArgTys.size(), 6717fb5e4888221cd36652d078c6b171ac55e7f406dArgyrios Kyrtzidis MDecl->isVariadic(), 0); 672306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian return T; 673306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian} 674306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian 6759e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 6769e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 6779e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// they point to and return true. If T1 and T2 aren't pointer types 6789e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// or pointer-to-member types, or if they are not similar at this 6799e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// level, returns false and leaves T1 and T2 unchanged. Top-level 6809e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// qualifiers on T1 and T2 are ignored. This function will typically 6819e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// be called in a loop that successively "unwraps" pointer and 6829e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// pointer-to-member types to compare them at each level. 68357373266011f73418381b736015d8d2bb0381176Douglas Gregorbool Sema::UnwrapSimilarPointerTypes(QualType& T1, QualType& T2) 68457373266011f73418381b736015d8d2bb0381176Douglas Gregor{ 68557373266011f73418381b736015d8d2bb0381176Douglas Gregor const PointerType *T1PtrType = T1->getAsPointerType(), 68657373266011f73418381b736015d8d2bb0381176Douglas Gregor *T2PtrType = T2->getAsPointerType(); 68757373266011f73418381b736015d8d2bb0381176Douglas Gregor if (T1PtrType && T2PtrType) { 68857373266011f73418381b736015d8d2bb0381176Douglas Gregor T1 = T1PtrType->getPointeeType(); 68957373266011f73418381b736015d8d2bb0381176Douglas Gregor T2 = T2PtrType->getPointeeType(); 69057373266011f73418381b736015d8d2bb0381176Douglas Gregor return true; 69157373266011f73418381b736015d8d2bb0381176Douglas Gregor } 69257373266011f73418381b736015d8d2bb0381176Douglas Gregor 6934433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl const MemberPointerType *T1MPType = T1->getAsMemberPointerType(), 6944433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl *T2MPType = T2->getAsMemberPointerType(); 69521593acb933324b439bc68b68e7cc7d1c3e3484dSebastian Redl if (T1MPType && T2MPType && 69621593acb933324b439bc68b68e7cc7d1c3e3484dSebastian Redl Context.getCanonicalType(T1MPType->getClass()) == 69721593acb933324b439bc68b68e7cc7d1c3e3484dSebastian Redl Context.getCanonicalType(T2MPType->getClass())) { 6984433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl T1 = T1MPType->getPointeeType(); 6994433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl T2 = T2MPType->getPointeeType(); 7004433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl return true; 7014433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl } 70257373266011f73418381b736015d8d2bb0381176Douglas Gregor return false; 70357373266011f73418381b736015d8d2bb0381176Douglas Gregor} 70457373266011f73418381b736015d8d2bb0381176Douglas Gregor 705cee63fbf0e64ac526582312bf8cf33263fc5c16eSebastian RedlSema::TypeResult Sema::ActOnTypeName(Scope *S, Declarator &D) { 7065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.6: Type names have no identifier. This is already validated by 7075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the parser. 7085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(D.getIdentifier() == 0 && "Type name should have no identifier!"); 7095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 710cee63fbf0e64ac526582312bf8cf33263fc5c16eSebastian Redl QualType T = GetTypeForDeclarator(D, S); 7115912a3544e438a92832b8c52c13f48d4f54795dcSteve Naroff 7125912a3544e438a92832b8c52c13f48d4f54795dcSteve Naroff assert(!T.isNull() && "GetTypeForDeclarator() returned null type"); 7135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7146d6eb57225b53fb627c565861d1d0e90645400d1Douglas Gregor // Check that there are no default arguments (C++ only). 7156d6eb57225b53fb627c565861d1d0e90645400d1Douglas Gregor if (getLangOptions().CPlusPlus) 7166d6eb57225b53fb627c565861d1d0e90645400d1Douglas Gregor CheckExtraCXXDefaultArguments(D); 7176d6eb57225b53fb627c565861d1d0e90645400d1Douglas Gregor 7185912a3544e438a92832b8c52c13f48d4f54795dcSteve Naroff // In this context, we *do not* check D.getInvalidType(). If the declarator 7195912a3544e438a92832b8c52c13f48d4f54795dcSteve Naroff // type was invalid, GetTypeForDeclarator() still returns a "valid" type, 7205912a3544e438a92832b8c52c13f48d4f54795dcSteve Naroff // though it will not reflect the user specified type. 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return T.getAsOpaquePtr(); 7225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 724c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner 725c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner 726c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner//===----------------------------------------------------------------------===// 727c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner// Type Attribute Processing 728c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner//===----------------------------------------------------------------------===// 729232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner 730232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner/// HandleAddressSpaceTypeAttribute - Process an address_space attribute on the 731c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner/// specified type. The attribute contains 1 argument, the id of the address 732c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner/// space for the type. 733c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattnerstatic void HandleAddressSpaceTypeAttribute(QualType &Type, 734c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner const AttributeList &Attr, Sema &S){ 735232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner // If this type is already address space qualified, reject it. 736232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner // Clause 6.7.3 - Type qualifiers: "No type shall be qualified by qualifiers 737232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner // for two or more different address spaces." 738232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner if (Type.getAddressSpace()) { 739c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner S.Diag(Attr.getLoc(), diag::err_attribute_address_multiple_qualifiers); 740c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner return; 741232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner } 742232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner 743232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner // Check the attribute arguments. 744545dd3401e7f31c256d69cb948a45d5ca781064cChris Lattner if (Attr.getNumArgs() != 1) { 745f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; 746c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner return; 747232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner } 748545dd3401e7f31c256d69cb948a45d5ca781064cChris Lattner Expr *ASArgExpr = static_cast<Expr *>(Attr.getArg(0)); 749232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner llvm::APSInt addrSpace(32); 750c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner if (!ASArgExpr->isIntegerConstantExpr(addrSpace, S.Context)) { 751dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner S.Diag(Attr.getLoc(), diag::err_attribute_address_space_not_int) 752dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << ASArgExpr->getSourceRange(); 753c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner return; 754232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner } 755232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner 756232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner unsigned ASIdx = static_cast<unsigned>(addrSpace.getZExtValue()); 757c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner Type = S.Context.getASQualType(Type, ASIdx); 758c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner} 759c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner 760c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattnervoid Sema::ProcessTypeAttributeList(QualType &Result, const AttributeList *AL) { 761c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // Scan through and apply attributes to this type where it makes sense. Some 762c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // attributes (such as __address_space__, __vector_size__, etc) apply to the 763c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // type, but others can be present in the type specifiers even though they 764c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // apply to the decl. Here we apply type attributes and ignore the rest. 765c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner for (; AL; AL = AL->getNext()) { 766c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // If this is an attribute we can handle, do so now, otherwise, add it to 767c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // the LeftOverAttrs list for rechaining. 768c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner switch (AL->getKind()) { 769c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner default: break; 770c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner case AttributeList::AT_address_space: 771c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner HandleAddressSpaceTypeAttribute(Result, *AL, *this); 772c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner break; 773c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner } 774c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner } 775232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner} 776232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner 7774ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @brief If the type T is incomplete and cannot be completed, 7784ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// produce a suitable diagnostic. 7794ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 7804ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// This routine checks whether the type @p T is complete in any 7814ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// context where a complete type is required. If @p T is a complete 7824ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// type, returns false. If @p T is incomplete, issues the diagnostic 7834ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @p diag (giving it the type @p T) and returns true. 7844ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 7854ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @param Loc The location in the source that the incomplete type 7864ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// diagnostic should refer to. 7874ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 7884ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @param T The type that this routine is examining for completeness. 7894ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 7904ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @param diag The diagnostic value (e.g., 7914ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @c diag::err_typecheck_decl_incomplete_type) that will be used 7924ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// for the error message if @p T is incomplete. 7934ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 7944ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @param Range1 An optional range in the source code that will be a 7954ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// part of the "incomplete type" error message. 7964ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 7974ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @param Range2 An optional range in the source code that will be a 7984ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// part of the "incomplete type" error message. 7994ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 8004ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @param PrintType If non-NULL, the type that should be printed 8014ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// instead of @p T. This parameter should be used when the type that 8024ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// we're checking for incompleteness isn't the type that should be 8034ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// displayed to the user, e.g., when T is a type and PrintType is a 8044ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// pointer to T. 8054ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 8064ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @returns @c true if @p T is incomplete and a diagnostic was emitted, 8074ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @c false otherwise. 8084ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 8094ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @todo When Clang gets proper support for C++ templates, this 8104ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// routine will also be able perform template instantiation when @p T 8114ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// is a class template specialization. 8124ec339f43c0cae2678334850c90926bea10999c7Douglas Gregorbool Sema::DiagnoseIncompleteType(SourceLocation Loc, QualType T, unsigned diag, 8134ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor SourceRange Range1, SourceRange Range2, 8144ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor QualType PrintType) { 8154ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor // If we have a complete type, we're done. 8164ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor if (!T->isIncompleteType()) 8174ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor return false; 8184ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor 8194ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor if (PrintType.isNull()) 8204ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor PrintType = T; 8214ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor 8224ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor // We have an incomplete type. Produce a diagnostic. 8234ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor Diag(Loc, diag) << PrintType << Range1 << Range2; 8243c0eb160ca1361a82b9f15b3b40a2425adc14d0fEli Friedman 8254ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor // If the type was a forward declaration of a class/struct/union 8264ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor // type, produce 8274ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor const TagType *Tag = 0; 8284ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor if (const RecordType *Record = T->getAsRecordType()) 8294ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor Tag = Record; 8304ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor else if (const EnumType *Enum = T->getAsEnumType()) 8314ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor Tag = Enum; 8324ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor 8334ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor if (Tag && !Tag->getDecl()->isInvalidDecl()) 8344ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor Diag(Tag->getDecl()->getLocation(), 8354ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor Tag->isBeingDefined() ? diag::note_type_being_defined 8364ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor : diag::note_forward_declaration) 8374ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor << QualType(Tag, 0); 8384ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor 8394ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor return true; 8404ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor} 841