SemaType.cpp revision 89951a86b594513c2a013532ed45d197413b1087
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()) { 3296b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner case DeclSpec::TST_void: 3396b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner Result = Context.VoidTy; 3496b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner break; 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_char: 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified) 37fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.CharTy; 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed) 39fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.SignedCharTy; 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else { 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Unknown TSS value"); 43fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.UnsignedCharTy; 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 45958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 4664c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis case DeclSpec::TST_wchar: 4764c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis if (DS.getTypeSpecSign() == DeclSpec::TSS_unspecified) 4864c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis Result = Context.WCharTy; 4964c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis else if (DS.getTypeSpecSign() == DeclSpec::TSS_signed) { 50f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec) 51f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner << DS.getSpecifierName(DS.getTypeSpecType()); 5264c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis Result = Context.getSignedWCharType(); 5364c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis } else { 5464c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis assert(DS.getTypeSpecSign() == DeclSpec::TSS_unsigned && 5564c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis "Unknown TSS value"); 56f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner Diag(DS.getTypeSpecSignLoc(), diag::ext_invalid_sign_spec) 57f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner << DS.getSpecifierName(DS.getTypeSpecType()); 5864c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis Result = Context.getUnsignedWCharType(); 5964c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis } 6064c438a4be2a871fa43c78264663ba1e9788b94dArgyrios Kyrtzidis break; 61d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner case DeclSpec::TST_unspecified: 6262f5f7ffad57e0c2af2b308af3735351505937cbChris Lattner // "<proto1,proto2>" is an objc qualified ID with a missing id. 63097e916b617bb4a069a03764024c310ed42a6424Chris Lattner if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) { 64ae4da6150bb837311a2f0f958b01a2989066ba90Chris Lattner Result = Context.getObjCQualifiedIdType((ObjCProtocolDecl**)PQ, 6562f5f7ffad57e0c2af2b308af3735351505937cbChris Lattner DS.getNumProtocolQualifiers()); 6662f5f7ffad57e0c2af2b308af3735351505937cbChris Lattner break; 6762f5f7ffad57e0c2af2b308af3735351505937cbChris Lattner } 6862f5f7ffad57e0c2af2b308af3735351505937cbChris Lattner 69d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // Unspecified typespec defaults to int in C90. However, the C90 grammar 70d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // [C90 6.5] only allows a decl-spec if there was *some* type-specifier, 71d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // type-qualifier, or storage-class-specifier. If not, emit an extwarn. 72d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // Note that the one exception to this is function definitions, which are 73d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // allowed to be completely missing a declspec. This is handled in the 74d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // parser already though by it pretending to have seen an 'int' in this 75d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // case. 76d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner if (getLangOptions().ImplicitInt) { 77d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner if ((DS.getParsedSpecifiers() & (DeclSpec::PQ_StorageClassSpecifier | 78d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner DeclSpec::PQ_TypeSpecifier | 79d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner DeclSpec::PQ_TypeQualifier)) == 0) 80d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner Diag(DS.getSourceRange().getBegin(), diag::ext_missing_declspec); 814310f4ee260e6c7ceeaf299e240f4d789ecc730dDouglas Gregor } else if (!DS.hasTypeSpecifier()) { 82d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // C99 and C++ require a type specifier. For example, C99 6.7.2p2 says: 83d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // "At least one type specifier shall be given in the declaration 84d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // specifiers in each declaration, and in the specifier-qualifier list in 85d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // each struct declaration and type name." 864310f4ee260e6c7ceeaf299e240f4d789ecc730dDouglas Gregor // FIXME: Does Microsoft really have the implicit int extension in C++? 874310f4ee260e6c7ceeaf299e240f4d789ecc730dDouglas Gregor unsigned DK = getLangOptions().CPlusPlus && !getLangOptions().Microsoft? 884310f4ee260e6c7ceeaf299e240f4d789ecc730dDouglas Gregor diag::err_missing_type_specifier 894310f4ee260e6c7ceeaf299e240f4d789ecc730dDouglas Gregor : diag::ext_missing_type_specifier; 904310f4ee260e6c7ceeaf299e240f4d789ecc730dDouglas Gregor Diag(DS.getSourceRange().getBegin(), DK); 91d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner } 92d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner 93d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner // FALL THROUGH. 943cbc38bd3569d37f53bd76fa89d24803f48f5036Chris Lattner case DeclSpec::TST_int: { 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getTypeSpecSign() != DeclSpec::TSS_unsigned) { 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (DS.getTypeSpecWidth()) { 97fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_unspecified: Result = Context.IntTy; break; 98fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_short: Result = Context.ShortTy; break; 99fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_long: Result = Context.LongTy; break; 100fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_longlong: Result = Context.LongLongTy; break; 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (DS.getTypeSpecWidth()) { 104fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_unspecified: Result = Context.UnsignedIntTy; break; 105fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_short: Result = Context.UnsignedShortTy; break; 106fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_long: Result = Context.UnsignedLongTy; break; 107fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TSW_longlong: Result =Context.UnsignedLongLongTy; break; 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 110958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 1113cbc38bd3569d37f53bd76fa89d24803f48f5036Chris Lattner } 112fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TST_float: Result = Context.FloatTy; break; 113958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner case DeclSpec::TST_double: 114958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner if (DS.getTypeSpecWidth() == DeclSpec::TSW_long) 115fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.LongDoubleTy; 116958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner else 117fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.DoubleTy; 118958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 119fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner case DeclSpec::TST_bool: Result = Context.BoolTy; break; // _Bool or bool 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_decimal32: // _Decimal32 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_decimal64: // _Decimal64 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_decimal128: // _Decimal128 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(0 && "FIXME: GNU decimal extensions not supported yet!"); 12499dc91422144483c20d1c7381bc9ac634b646b04Chris Lattner case DeclSpec::TST_class: 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_enum: 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_union: 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclSpec::TST_struct: { 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Decl *D = static_cast<Decl *>(DS.getTypeRep()); 12999dc91422144483c20d1c7381bc9ac634b646b04Chris Lattner assert(D && "Didn't get a decl for a class/enum/union/struct?"); 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getTypeSpecSign() == 0 && 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Can't handle qualifiers on typedef names yet!"); 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TypeQuals handled by caller. 1342ce52f3fb95bf544db6bd3d91a72bce7d9cceb6cDouglas Gregor Result = Context.getTypeDeclType(cast<TypeDecl>(D)); 135958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1371a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor case DeclSpec::TST_typename: { 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(DS.getTypeSpecWidth() == 0 && DS.getTypeSpecComplex() == 0 && 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getTypeSpecSign() == 0 && 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Can't handle qualifiers on typedef names yet!"); 1411a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor Result = QualType::getFromOpaquePtr(DS.getTypeRep()); 1422ce52f3fb95bf544db6bd3d91a72bce7d9cceb6cDouglas Gregor 1431a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor if (DeclSpec::ProtocolQualifierListTy PQ = DS.getProtocolQualifiers()) { 1441a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor // FIXME: Adding a TST_objcInterface clause doesn't seem ideal, so 1451a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor // we have this "hack" for now... 1461a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor if (const ObjCInterfaceType *Interface = Result->getAsObjCInterfaceType()) 1471a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor Result = Context.getObjCQualifiedInterfaceType(Interface->getDecl(), 1481a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor (ObjCProtocolDecl**)PQ, 1491a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor DS.getNumProtocolQualifiers()); 1501a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor else if (Result == Context.getObjCIdType()) 151ae4da6150bb837311a2f0f958b01a2989066ba90Chris Lattner // id<protocol-list> 152ae4da6150bb837311a2f0f958b01a2989066ba90Chris Lattner Result = Context.getObjCQualifiedIdType((ObjCProtocolDecl**)PQ, 153ae4da6150bb837311a2f0f958b01a2989066ba90Chris Lattner DS.getNumProtocolQualifiers()); 154c569249ca0ab755ac79d8cbbfcb2bcae19743624Fariborz Jahanian } 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TypeQuals handled by caller. 156958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 158958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner case DeclSpec::TST_typeofType: 159958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner Result = QualType::getFromOpaquePtr(DS.getTypeRep()); 160958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner assert(!Result.isNull() && "Didn't get a type for typeof?"); 161d1861fd633d5096a00777c918eb8575ea7162fe7Steve Naroff // TypeQuals handled by caller. 162fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.getTypeOfType(Result); 163958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 164d1861fd633d5096a00777c918eb8575ea7162fe7Steve Naroff case DeclSpec::TST_typeofExpr: { 165d1861fd633d5096a00777c918eb8575ea7162fe7Steve Naroff Expr *E = static_cast<Expr *>(DS.getTypeRep()); 166d1861fd633d5096a00777c918eb8575ea7162fe7Steve Naroff assert(E && "Didn't get an expression for typeof?"); 167d1861fd633d5096a00777c918eb8575ea7162fe7Steve Naroff // TypeQuals handled by caller. 168fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.getTypeOfExpr(E); 169958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner break; 170d1861fd633d5096a00777c918eb8575ea7162fe7Steve Naroff } 171809070a886684cb5b92eb0e00a6581ab1fa6b17aDouglas Gregor case DeclSpec::TST_error: 172809070a886684cb5b92eb0e00a6581ab1fa6b17aDouglas Gregor return QualType(); 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 174958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner 175958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner // Handle complex types. 176f244cd7e54753caf6edb76df430dea2f43bb82a8Douglas Gregor if (DS.getTypeSpecComplex() == DeclSpec::TSC_complex) { 177f244cd7e54753caf6edb76df430dea2f43bb82a8Douglas Gregor if (getLangOptions().Freestanding) 178f244cd7e54753caf6edb76df430dea2f43bb82a8Douglas Gregor Diag(DS.getTypeSpecComplexLoc(), diag::ext_freestanding_complex); 179fab5b45729db4e24ba43bb94d1bce5f73106be78Chris Lattner Result = Context.getComplexType(Result); 180f244cd7e54753caf6edb76df430dea2f43bb82a8Douglas Gregor } 181958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner 182958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner assert(DS.getTypeSpecComplex() != DeclSpec::TSC_imaginary && 183958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner "FIXME: imaginary types not supported yet!"); 184958858e04e9f98a42031ba69779e49c21f01ca6cChris Lattner 18538d8b98803ac354dba15578d65ea99a83dead046Chris Lattner // See if there are any attributes on the declspec that apply to the type (as 18638d8b98803ac354dba15578d65ea99a83dead046Chris Lattner // opposed to the decl). 187fca0ddd42965e0b7ae821213486d4e0dd71fb439Chris Lattner if (const AttributeList *AL = DS.getAttributes()) 188c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner ProcessTypeAttributeList(Result, AL); 189f1d705c3e2276f7f5b97b8b3394b9b3068fdf25bChris Lattner 19096b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Apply const/volatile/restrict qualifiers to T. 19196b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if (unsigned TypeQuals = DS.getTypeQualifiers()) { 19296b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner 19396b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Enforce C99 6.7.3p2: "Types other than pointer types derived from object 19496b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // or incomplete types shall not be restrict-qualified." C++ also allows 19596b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // restrict-qualified references. 19696b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if (TypeQuals & QualType::Restrict) { 197bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner if (const PointerLikeType *PT = Result->getAsPointerLikeType()) { 198bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner QualType EltTy = PT->getPointeeType(); 199bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner 200bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner // If we have a pointer or reference, the pointee must have an object or 201bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner // incomplete type. 202bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner if (!EltTy->isIncompleteOrObjectType()) { 203bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner Diag(DS.getRestrictSpecLoc(), 204d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner diag::err_typecheck_invalid_restrict_invalid_pointee) 205d162584991885ab004a02573a73ce06422b921fcChris Lattner << EltTy << DS.getSourceRange(); 206bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner TypeQuals &= ~QualType::Restrict; // Remove the restrict qualifier. 207bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner } 208bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner } else { 20996b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner Diag(DS.getRestrictSpecLoc(), 210d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner diag::err_typecheck_invalid_restrict_not_pointer) 211d162584991885ab004a02573a73ce06422b921fcChris Lattner << Result << DS.getSourceRange(); 212bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner TypeQuals &= ~QualType::Restrict; // Remove the restrict qualifier. 21396b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner } 21496b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner } 21596b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner 21696b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Warn about CV qualifiers on functions: C99 6.7.3p8: "If the specification 21796b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // of a function type includes any type qualifiers, the behavior is 21896b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // undefined." 21996b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if (Result->isFunctionType() && TypeQuals) { 22096b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Get some location to point at, either the C or V location. 22196b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner SourceLocation Loc; 22296b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if (TypeQuals & QualType::Const) 22396b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner Loc = DS.getConstSpecLoc(); 22496b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner else { 22596b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner assert((TypeQuals & QualType::Volatile) && 22696b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner "Has CV quals but not C or V?"); 22796b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner Loc = DS.getVolatileSpecLoc(); 22896b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner } 229d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(Loc, diag::warn_typecheck_function_qualifiers) 230d162584991885ab004a02573a73ce06422b921fcChris Lattner << Result << DS.getSourceRange(); 23196b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner } 23296b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner 233f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // C++ [dcl.ref]p1: 234f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // Cv-qualified references are ill-formed except when the 235f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // cv-qualifiers are introduced through the use of a typedef 236f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // (7.1.3) or of a template type argument (14.3), in which 237f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // case the cv-qualifiers are ignored. 2381a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor // FIXME: Shouldn't we be checking SCS_typedef here? 2391a51b4a11b7db25cac2134249711ecaaf9d1c0a8Douglas Gregor if (DS.getTypeSpecType() == DeclSpec::TST_typename && 240f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor TypeQuals && Result->isReferenceType()) { 241f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor TypeQuals &= ~QualType::Const; 242f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor TypeQuals &= ~QualType::Volatile; 243f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor } 244f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor 24596b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner Result = Result.getQualifiedType(TypeQuals); 24696b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner } 247f1d705c3e2276f7f5b97b8b3394b9b3068fdf25bChris Lattner return Result; 248f1d705c3e2276f7f5b97b8b3394b9b3068fdf25bChris Lattner} 249f1d705c3e2276f7f5b97b8b3394b9b3068fdf25bChris Lattner 25098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump/// GetTypeForDeclarator - Convert the type for the specified 25198eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump/// declarator to Type instances. Skip the outermost Skip type 25298eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump/// objects. 253cee63fbf0e64ac526582312bf8cf33263fc5c16eSebastian RedlQualType Sema::GetTypeForDeclarator(Declarator &D, Scope *S, unsigned Skip) { 25498eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump bool OmittedReturnType = false; 25598eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump 25698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (D.getContext() == Declarator::BlockLiteralContext 25798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump && Skip == 0 25898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump && !D.getDeclSpec().hasTypeSpecifier() 25998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump && (D.getNumTypeObjects() == 0 26098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump || (D.getNumTypeObjects() == 1 26198eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump && D.getTypeObject(0).Kind == DeclaratorChunk::Function))) 26298eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump OmittedReturnType = true; 26398eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump 264b23deda7333cfc2316c989d10745c145dfbea6d6Chris Lattner // long long is a C99 feature. 265d1eb332181f02a7e0a6f9749265e6a0f55555cd4Chris Lattner if (!getLangOptions().C99 && !getLangOptions().CPlusPlus0x && 266b23deda7333cfc2316c989d10745c145dfbea6d6Chris Lattner D.getDeclSpec().getTypeSpecWidth() == DeclSpec::TSW_longlong) 267b23deda7333cfc2316c989d10745c145dfbea6d6Chris Lattner Diag(D.getDeclSpec().getTypeSpecWidthLoc(), diag::ext_longlong); 268930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor 269930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor // Determine the type of the declarator. Not all forms of declarator 270930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor // have a type. 271930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor QualType T; 272930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor switch (D.getKind()) { 273930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor case Declarator::DK_Abstract: 274930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor case Declarator::DK_Normal: 27598eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump case Declarator::DK_Operator: { 27698eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump const DeclSpec& DS = D.getDeclSpec(); 27798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump if (OmittedReturnType) 27898eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // We default to a dependent type initially. Can be modified by 27998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // the first return statement. 28098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump T = Context.DependentTy; 281809070a886684cb5b92eb0e00a6581ab1fa6b17aDouglas Gregor else { 28298eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump T = ConvertDeclSpecToType(DS); 283809070a886684cb5b92eb0e00a6581ab1fa6b17aDouglas Gregor if (T.isNull()) 284809070a886684cb5b92eb0e00a6581ab1fa6b17aDouglas Gregor return T; 285809070a886684cb5b92eb0e00a6581ab1fa6b17aDouglas Gregor } 286930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor break; 28798eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump } 288930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor 289930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor case Declarator::DK_Constructor: 290930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor case Declarator::DK_Destructor: 291930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor case Declarator::DK_Conversion: 292930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor // Constructors and destructors don't have return types. Use 293930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor // "void" instead. Conversion operators will check their return 294930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor // types separately. 295930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor T = Context.VoidTy; 296930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor break; 297930d8b5ecc074cca01ecd9a522a55f55f3b72396Douglas Gregor } 2984c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl 29998eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // Walk the DeclTypeInfo, building the recursive type as we go. 30098eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // DeclTypeInfos are ordered from the identifier out, which is 30198eb8a7a702b95183ed015706b1f1c66f5cb27a4Mike Stump // opposite of what we want :). 302cee63fbf0e64ac526582312bf8cf33263fc5c16eSebastian Redl for (unsigned i = Skip, e = D.getNumTypeObjects(); i != e; ++i) { 303cee63fbf0e64ac526582312bf8cf33263fc5c16eSebastian Redl DeclaratorChunk &DeclType = D.getTypeObject(e-i-1+Skip); 3045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (DeclType.Kind) { 3055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: assert(0 && "Unknown decltype!"); 3065618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff case DeclaratorChunk::BlockPointer: 3075618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff if (DeclType.Cls.TypeQuals) 3085618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff Diag(D.getIdentifierLoc(), diag::err_qualified_block_pointer_type); 3095618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff if (!T.getTypePtr()->isFunctionType()) 3105618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff Diag(D.getIdentifierLoc(), diag::err_nonfunction_block_type); 3115618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff else 3125618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff T = Context.getBlockPointerType(T); 3135618bd4a52c45fbbb605e3ba885663b2164db8a3Steve Naroff break; 3145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclaratorChunk::Pointer: 31502c642e8f40562fcc9d440977f232c021b9d4353Chris Lattner if (T->isReferenceType()) { 3165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C++ 8.3.2p4: There shall be no ... pointers to references ... 317d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(DeclType.Loc, diag::err_illegal_decl_pointer_to_reference) 318d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name"); 319e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff D.setInvalidType(true); 3205265af5b555f703be365dbc32c4e518fe38d4d9aChris Lattner T = Context.IntTy; 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 32396b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Enforce C99 6.7.3p2: "Types other than pointer types derived from 32496b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // object or incomplete types shall not be restrict-qualified." 32596b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if ((DeclType.Ptr.TypeQuals & QualType::Restrict) && 326d805bec0fbb98aa10abbb41bfdcb2e2fab1bac96Chris Lattner !T->isIncompleteOrObjectType()) { 327d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(DeclType.Loc, diag::err_typecheck_invalid_restrict_invalid_pointee) 328d162584991885ab004a02573a73ce06422b921fcChris Lattner << T; 329f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl DeclType.Ptr.TypeQuals &= ~QualType::Restrict; 330f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 331f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl 3325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Apply the pointer typequals to the pointer object. 3335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer T = Context.getPointerType(T).getQualifiedType(DeclType.Ptr.TypeQuals); 3345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 335f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor case DeclaratorChunk::Reference: { 336f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // Whether we should suppress the creation of the reference. 337f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor bool SuppressReference = false; 338f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor if (T->isReferenceType()) { 339f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // C++ [dcl.ref]p4: There shall be no references to references. 340f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // 341f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // According to C++ DR 106, references to references are only 342f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // diagnosed when they are written directly (e.g., "int & &"), 343f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // but not when they happen via a typedef: 344f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // 345f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // typedef int& intref; 346f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // typedef intref& intref2; 347f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // 348f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // Parser::ParserDeclaratorInternal diagnoses the case where 349f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // references are written directly; here, we handle the 350f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // collapsing of references-to-references as described in C++ 351f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // DR 106 and amended by C++ DR 540. 352f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor SuppressReference = true; 353f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor } 354f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor 355f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // C++ [dcl.ref]p1: 356f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // A declarator that specifies the type “reference to cv void” 357f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor // is ill-formed. 358f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor if (T->isVoidType()) { 359f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor Diag(DeclType.Loc, diag::err_reference_to_void); 360e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff D.setInvalidType(true); 361f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor T = Context.IntTy; 3625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 36496b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Enforce C99 6.7.3p2: "Types other than pointer types derived from 36596b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // object or incomplete types shall not be restrict-qualified." 36696b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if (DeclType.Ref.HasRestrict && 367d805bec0fbb98aa10abbb41bfdcb2e2fab1bac96Chris Lattner !T->isIncompleteOrObjectType()) { 368d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(DeclType.Loc, diag::err_typecheck_invalid_restrict_invalid_pointee) 369d162584991885ab004a02573a73ce06422b921fcChris Lattner << T; 37096b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner DeclType.Ref.HasRestrict = false; 37196b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner } 37296b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner 373f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor if (!SuppressReference) 374f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor T = Context.getReferenceType(T); 37596b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner 37696b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner // Handle restrict on references. 37796b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner if (DeclType.Ref.HasRestrict) 37896b77fc05ed4a052a9e614f72b0e83572408ce48Chris Lattner T.addRestrict(); 3795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 380f1f9b4e5c7fd087e78f2e387c01098d49d41e784Douglas Gregor } 3815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclaratorChunk::Array: { 382fd89bc825026e44c68a68db72d4012fd6752e70fChris Lattner DeclaratorChunk::ArrayTypeInfo &ATI = DeclType.Arr; 38394f81fd0b0f81a99d215b225c8c5616295b063f6Chris Lattner Expr *ArraySize = static_cast<Expr*>(ATI.NumElts); 3845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ArrayType::ArraySizeModifier ASM; 3855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ATI.isStar) 3865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ASM = ArrayType::Star; 3875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else if (ATI.hasStatic) 3885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ASM = ArrayType::Static; 3895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 3905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ASM = ArrayType::Normal; 3915265af5b555f703be365dbc32c4e518fe38d4d9aChris Lattner 3925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.5.2p1: If the element type is an incomplete or function type, 3935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // reject it (e.g. void ary[7], struct foo ary[7], void ary[7]()) 3944ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor if (DiagnoseIncompleteType(D.getIdentifierLoc(), T, 3954ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor diag::err_illegal_decl_array_incomplete_type)) { 396e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff T = Context.IntTy; 397e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff D.setInvalidType(true); 3985265af5b555f703be365dbc32c4e518fe38d4d9aChris Lattner } else if (T->isFunctionType()) { 399d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(D.getIdentifierLoc(), diag::err_illegal_decl_array_of_functions) 400d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name"); 401e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff T = Context.getPointerType(T); 402e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff D.setInvalidType(true); 403a1d9fdea79ba7bbd71862b9f9f78f5f117331fc7Chris Lattner } else if (const ReferenceType *RT = T->getAsReferenceType()) { 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C++ 8.3.2p4: There shall be no ... arrays of references ... 405d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(D.getIdentifierLoc(), diag::err_illegal_decl_array_of_references) 406d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name"); 407bdcd637c29ec1540f912ea6860c88b910e78c329Chris Lattner T = RT->getPointeeType(); 408e1223f7246c2c297f7b62816fd8c6a0a14151977Steve Naroff D.setInvalidType(true); 40902c642e8f40562fcc9d440977f232c021b9d4353Chris Lattner } else if (const RecordType *EltTy = T->getAsRecordType()) { 4105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the element type is a struct or union that contains a variadic 4110bfe54fdc83b7b4e37c40e652d86d15aa89885b2Douglas Gregor // array, accept it as a GNU extension: C99 6.7.2.1p2. 4120bfe54fdc83b7b4e37c40e652d86d15aa89885b2Douglas Gregor if (EltTy->getDecl()->hasFlexibleArrayMember()) 4130bfe54fdc83b7b4e37c40e652d86d15aa89885b2Douglas Gregor Diag(DeclType.Loc, diag::ext_flexible_array_in_array) << T; 41443477ca46792311640cf29b7cff731e29bebb146Chris Lattner } else if (T->isObjCInterfaceType()) { 415d162584991885ab004a02573a73ce06422b921fcChris Lattner Diag(DeclType.Loc, diag::warn_objc_array_of_interfaces) << T; 4165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 41743477ca46792311640cf29b7cff731e29bebb146Chris Lattner 41842471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff // C99 6.7.5.2p1: The size expression shall have integer type. 41942471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff if (ArraySize && !ArraySize->getType()->isIntegerType()) { 420d3a94e24ddf3fb90de76b17bd176d9ed61e66f2cChris Lattner Diag(ArraySize->getLocStart(), diag::err_array_size_non_int) 421d162584991885ab004a02573a73ce06422b921fcChris Lattner << ArraySize->getType() << ArraySize->getSourceRange(); 42242471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff D.setInvalidType(true); 423169a2664a64b57a815b5f0b39276a0891663921aTed Kremenek ArraySize->Destroy(Context); 424fd89bc825026e44c68a68db72d4012fd6752e70fChris Lattner ATI.NumElts = ArraySize = 0; 42542471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff } 426c9406125e2cac9208098655ac8058c095c2c3a65Steve Naroff llvm::APSInt ConstVal(32); 427c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman if (!ArraySize) { 428c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman T = Context.getIncompleteArrayType(T, ASM, ATI.TypeQuals); 429898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor } else if (ArraySize->isValueDependent()) { 430898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor T = Context.getDependentSizedArrayType(T, ArraySize, ASM, ATI.TypeQuals); 43137148aabe7d153ce682b5715a820a11c0bbfcd59Eli Friedman } else if (!ArraySize->isIntegerConstantExpr(ConstVal, Context) || 432cee63fbf0e64ac526582312bf8cf33263fc5c16eSebastian Redl !T->isConstantSizeType()) { 43337148aabe7d153ce682b5715a820a11c0bbfcd59Eli Friedman // Per C99, a variable array is an array with either a non-constant 43437148aabe7d153ce682b5715a820a11c0bbfcd59Eli Friedman // size or an element type that has a non-constant-size 435c9406125e2cac9208098655ac8058c095c2c3a65Steve Naroff T = Context.getVariableArrayType(T, ArraySize, ASM, ATI.TypeQuals); 436c5773c4b8ce1ed6ed5c7112c9020c954a47dce96Eli Friedman } else { 43742471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff // C99 6.7.5.2p1: If the expression is a constant expression, it shall 43842471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff // have a value greater than zero. 43942471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff if (ConstVal.isSigned()) { 44042471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff if (ConstVal.isNegative()) { 441dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ArraySize->getLocStart(), 442dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner diag::err_typecheck_negative_array_size) 443dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << ArraySize->getSourceRange(); 44442471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff D.setInvalidType(true); 44542471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff } else if (ConstVal == 0) { 44642471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff // GCC accepts zero sized static arrays. 447dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner Diag(ArraySize->getLocStart(), diag::ext_typecheck_zero_array_size) 448dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << ArraySize->getSourceRange(); 44942471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff } 45042471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff } 451c9406125e2cac9208098655ac8058c095c2c3a65Steve Naroff T = Context.getConstantArrayType(T, ConstVal, ASM, ATI.TypeQuals); 45242471f8bc6c1179a54941fac3c483ec1bd319436Steve Naroff } 45394f81fd0b0f81a99d215b225c8c5616295b063f6Chris Lattner // If this is not C99, extwarn about VLA's and C99 array size modifiers. 454a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner if (!getLangOptions().C99) { 455a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner if (ArraySize && !ArraySize->isValueDependent() && 456a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner !ArraySize->isIntegerConstantExpr(Context)) 457a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner Diag(D.getIdentifierLoc(), diag::ext_vla); 458a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner else if (ASM != ArrayType::Normal || ATI.TypeQuals != 0) 459a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner Diag(D.getIdentifierLoc(), diag::ext_c99_array_usage); 460a1fcbadf4f930c22bb171fb90ed886f5f359d010Chris Lattner } 4615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 4625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 463f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl case DeclaratorChunk::Function: { 4645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the function declarator has a prototype (i.e. it is not () and 4655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // does not have a K&R-style identifier list), then the arguments are part 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // of the type, otherwise the argument list is (). 4675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk::FunctionTypeInfo &FTI = DeclType.Fun; 46868cfd49ea35d9101da9e6d4d5642263c9e95f1a4Chris Lattner 469cd8812948bc8a65dcf10c541c1775e5ba44def6cChris Lattner // C99 6.7.5.3p1: The return type may not be a function or array type. 47068cfd49ea35d9101da9e6d4d5642263c9e95f1a4Chris Lattner if (T->isArrayType() || T->isFunctionType()) { 471d162584991885ab004a02573a73ce06422b921fcChris Lattner Diag(DeclType.Loc, diag::err_func_returning_array_function) << T; 472cd8812948bc8a65dcf10c541c1775e5ba44def6cChris Lattner T = Context.IntTy; 473cd8812948bc8a65dcf10c541c1775e5ba44def6cChris Lattner D.setInvalidType(true); 474cd8812948bc8a65dcf10c541c1775e5ba44def6cChris Lattner } 475cd8812948bc8a65dcf10c541c1775e5ba44def6cChris Lattner 476eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman if (FTI.NumArgs == 0) { 477c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis if (getLangOptions().CPlusPlus) { 478c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis // C++ 8.3.5p2: If the parameter-declaration-clause is empty, the 479c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis // function takes no arguments. 480971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis T = Context.getFunctionType(T, NULL, 0, FTI.isVariadic,FTI.TypeQuals); 481965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor } else if (FTI.isVariadic) { 482965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor // We allow a zero-parameter variadic function in C if the 483965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor // function is marked with the "overloadable" 484965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor // attribute. Scan for this attribute now. 485965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor bool Overloadable = false; 486965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor for (const AttributeList *Attrs = D.getAttributes(); 487965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor Attrs; Attrs = Attrs->getNext()) { 488965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor if (Attrs->getKind() == AttributeList::AT_overloadable) { 489965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor Overloadable = true; 490965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor break; 491965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor } 492965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor } 493965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor 494965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor if (!Overloadable) 495965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor Diag(FTI.getEllipsisLoc(), diag::err_ellipsis_first_arg); 496965acbb321e94e36aa5365126eee46b97745fdbbDouglas Gregor T = Context.getFunctionType(T, NULL, 0, FTI.isVariadic, 0); 497c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis } else { 498c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis // Simple void foo(), where the incoming T is the result type. 499c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis T = Context.getFunctionTypeNoProto(T); 500c6f7345e44e079f373d6bdecaa06c7e06574dc27Argyrios Kyrtzidis } 501eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman } else if (FTI.ArgInfo[0].Param == 0) { 5025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.5.3p3: Reject int(x,y,z) when it's not a function definition. 503eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman Diag(FTI.ArgInfo[0].IdentLoc, diag::err_ident_list_in_fn_declaration); 5045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 5055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, we have a function with an argument list that is 5065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // potentially variadic. 5075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::SmallVector<QualType, 16> ArgTys; 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = FTI.NumArgs; i != e; ++i) { 5108123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner ParmVarDecl *Param = (ParmVarDecl *)FTI.ArgInfo[i].Param; 5118123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner QualType ArgTy = Param->getType(); 51278c75fb3d275079c5fab30eeb33077958f2b0265Chris Lattner assert(!ArgTy.isNull() && "Couldn't parse type?"); 51308d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // 51408d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // Perform the default function/array conversion (C99 6.7.5.3p[7,8]). 51508d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // This matches the conversion that is done in 516bff5f5cfd194c3cc096ba89360fb537814a9666aNate Begeman // Sema::ActOnParamDeclarator(). Without this conversion, the 51708d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // argument type in the function prototype *will not* match the 51808d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // type in ParmVarDecl (which makes the code generator unhappy). 51908d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // 52008d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // FIXME: We still apparently need the conversion in 521e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner // Sema::ActOnParamDeclarator(). This doesn't make any sense, since 52208d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // it should be driving off the type being created here. 52308d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // 52408d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // FIXME: If a source translation tool needs to see the original type, 52508d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // then we need to consider storing both types somewhere... 52608d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff // 527e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner if (ArgTy->isArrayType()) { 528e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner ArgTy = Context.getArrayDecayedType(ArgTy); 529529bd02affa96a311dd9ab131f2ab4d833017fb7Chris Lattner } else if (ArgTy->isFunctionType()) 53008d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff ArgTy = Context.getPointerType(ArgTy); 531e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner 5325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Look for 'void'. void is allowed only as a single argument to a 5335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // function with no other parameters (C99 6.7.5.3p10). We record 5345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // int(void) as a FunctionTypeProto with an empty argument list. 53508d51393bfa55a0b7d99db2b2a59f1df7d3f4f68Steve Naroff else if (ArgTy->isVoidType()) { 5365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is something like 'float(int, void)', reject it. 'void' 5375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // is an incomplete type (C99 6.2.5p19) and function decls cannot 5385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // have arguments of incomplete type. 5395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FTI.NumArgs != 1 || FTI.isVariadic) { 5405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DeclType.Loc, diag::err_void_only_param); 5412ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner ArgTy = Context.IntTy; 5428123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner Param->setType(ArgTy); 5432ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner } else if (FTI.ArgInfo[i].Ident) { 5442ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner // Reject, but continue to parse 'int(void abc)'. 5455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(FTI.ArgInfo[i].IdentLoc, 5464565d4e83cec55356fe9c75929579eacced9da36Chris Lattner diag::err_param_with_void_type); 5472ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner ArgTy = Context.IntTy; 5488123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner Param->setType(ArgTy); 5492ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner } else { 5502ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner // Reject, but continue to parse 'float(const void)'. 551f46699ce225811d8d9dbab9d00189a0e54469457Chris Lattner if (ArgTy.getCVRQualifiers()) 5522ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner Diag(DeclType.Loc, diag::err_void_param_qualified); 5532ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner 5542ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner // Do not add 'void' to the ArgTys list. 5552ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner break; 5562ff5426cd83ae02378efacdfeb70d6785eb09a30Chris Lattner } 557eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman } else if (!FTI.hasPrototype) { 558eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman if (ArgTy->isPromotableIntegerType()) { 559eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman ArgTy = Context.IntTy; 560eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman } else if (const BuiltinType* BTy = ArgTy->getAsBuiltinType()) { 561eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman if (BTy->getKind() == BuiltinType::Float) 562eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman ArgTy = Context.DoubleTy; 563eb4b7051a596560ef4a1846e3714707f44e9dc30Eli Friedman } 5645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ArgTys.push_back(ArgTy); 5675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer T = Context.getFunctionType(T, &ArgTys[0], ArgTys.size(), 569971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis FTI.isVariadic, FTI.TypeQuals); 5705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 5725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 573f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl case DeclaratorChunk::MemberPointer: 574f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // The scope spec must refer to a class, or be dependent. 575f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl DeclContext *DC = static_cast<DeclContext*>( 576f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl DeclType.Mem.Scope().getScopeRep()); 577f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl QualType ClsType; 578f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // FIXME: Extend for dependent types when it's actually supported. 579f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // See ActOnCXXNestedNameSpecifier. 580f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl if (CXXRecordDecl *RD = dyn_cast_or_null<CXXRecordDecl>(DC)) { 581f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl ClsType = Context.getTagDeclType(RD); 582f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } else { 583f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl if (DC) { 584f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl Diag(DeclType.Mem.Scope().getBeginLoc(), 585f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl diag::err_illegal_decl_mempointer_in_nonclass) 586f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name") 587f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl << DeclType.Mem.Scope().getRange(); 588f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 589f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl D.setInvalidType(true); 590f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl ClsType = Context.IntTy; 591f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 592f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl 593f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // C++ 8.3.3p3: A pointer to member shall not pointer to ... a member 594f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // with reference type, or "cv void." 595f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl if (T->isReferenceType()) { 596f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl Diag(DeclType.Loc, diag::err_illegal_decl_pointer_to_reference) 597f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name"); 598f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl D.setInvalidType(true); 599f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl T = Context.IntTy; 600f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 601f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl if (T->isVoidType()) { 602f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl Diag(DeclType.Loc, diag::err_illegal_decl_mempointer_to_void) 603f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl << (D.getIdentifier() ? D.getIdentifier()->getName() : "type name"); 604f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl T = Context.IntTy; 605f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 606f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl 607f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // Enforce C99 6.7.3p2: "Types other than pointer types derived from 608f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl // object or incomplete types shall not be restrict-qualified." 609f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl if ((DeclType.Mem.TypeQuals & QualType::Restrict) && 610f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl !T->isIncompleteOrObjectType()) { 611f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl Diag(DeclType.Loc, diag::err_typecheck_invalid_restrict_invalid_pointee) 612f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl << T; 613f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl DeclType.Mem.TypeQuals &= ~QualType::Restrict; 614f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 615f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl 6164433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl T = Context.getMemberPointerType(T, ClsType.getTypePtr()). 6174433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl getQualifiedType(DeclType.Mem.TypeQuals); 618f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl 619f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl break; 620f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl } 621f30208ad5b334e93582e846a2a0c92f38a607b8aSebastian Redl 622c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // See if there are any attributes on this declarator chunk. 623c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner if (const AttributeList *AL = DeclType.getAttrs()) 624c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner ProcessTypeAttributeList(T, AL); 6255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 626971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis 627971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis if (getLangOptions().CPlusPlus && T->isFunctionType()) { 628971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis const FunctionTypeProto *FnTy = T->getAsFunctionTypeProto(); 629971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis assert(FnTy && "Why oh why is there not a FunctionTypeProto here ?"); 630971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis 631971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis // C++ 8.3.5p4: A cv-qualifier-seq shall only be part of the function type 632971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis // for a nonstatic member function, the function type to which a pointer 633971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis // to member refers, or the top-level function type of a function typedef 634971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis // declaration. 635971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis if (FnTy->getTypeQuals() != 0 && 636971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && 637584049d49d956add7bce5669e9823491f7d8de78Douglas Gregor ((D.getContext() != Declarator::MemberContext && 638584049d49d956add7bce5669e9823491f7d8de78Douglas Gregor (!D.getCXXScopeSpec().isSet() || 639584049d49d956add7bce5669e9823491f7d8de78Douglas Gregor !static_cast<DeclContext*>(D.getCXXScopeSpec().getScopeRep()) 640bcbffc46f1ad3796c4582fa1e3a9113b5aa26061Douglas Gregor ->isRecord())) || 641971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_static)) { 642971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis if (D.isFunctionDeclarator()) 643971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis Diag(D.getIdentifierLoc(), diag::err_invalid_qualified_function_type); 644971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis else 645971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis Diag(D.getIdentifierLoc(), 646971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis diag::err_invalid_qualified_typedef_function_type_use); 647971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis 648971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis // Strip the cv-quals from the type. 649971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis T = Context.getFunctionType(FnTy->getResultType(), FnTy->arg_type_begin(), 6507fb5e4888221cd36652d078c6b171ac55e7f406dArgyrios Kyrtzidis FnTy->getNumArgs(), FnTy->isVariadic(), 0); 651971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis } 652971c4fae6092976338b755af1d47dac07c8f16e3Argyrios Kyrtzidis } 6535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6540bf29ad534c381087e89efadbf7aff0579bf259fChris Lattner // If there were any type attributes applied to the decl itself (not the 6550bf29ad534c381087e89efadbf7aff0579bf259fChris Lattner // type, apply the type attribute to the type!) 6560bf29ad534c381087e89efadbf7aff0579bf259fChris Lattner if (const AttributeList *Attrs = D.getAttributes()) 657c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner ProcessTypeAttributeList(T, Attrs); 6580bf29ad534c381087e89efadbf7aff0579bf259fChris Lattner 6595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return T; 6605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 662a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek/// ObjCGetTypeForMethodDefinition - Builds the type for a method definition 663360300ca2ee298d585d29baf006519507d968812Fariborz Jahanian/// declarator 664a526c5c67e5a0473c340903ee542ce570119665fTed KremenekQualType Sema::ObjCGetTypeForMethodDefinition(DeclTy *D) { 66589951a86b594513c2a013532ed45d197413b1087Chris Lattner ObjCMethodDecl *MDecl = cast<ObjCMethodDecl>(static_cast<Decl *>(D)); 666306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian QualType T = MDecl->getResultType(); 667306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian llvm::SmallVector<QualType, 16> ArgTys; 668306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian 6693560002bed2be6b428f1a909c489a8857b4417c7Fariborz Jahanian // Add the first two invisible argument types for self and _cmd. 670f8d49f64ef6ab7e632717a31631fc289aab69428Douglas Gregor if (MDecl->isInstanceMethod()) { 671a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek QualType selfTy = Context.getObjCInterfaceType(MDecl->getClassInterface()); 6721f7b6f88f18d7f6b10265acec5d41c4ed1897487Fariborz Jahanian selfTy = Context.getPointerType(selfTy); 6731f7b6f88f18d7f6b10265acec5d41c4ed1897487Fariborz Jahanian ArgTys.push_back(selfTy); 67489951a86b594513c2a013532ed45d197413b1087Chris Lattner } else 675a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ArgTys.push_back(Context.getObjCIdType()); 676a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ArgTys.push_back(Context.getObjCSelType()); 6773560002bed2be6b428f1a909c489a8857b4417c7Fariborz Jahanian 67889951a86b594513c2a013532ed45d197413b1087Chris Lattner for (ObjCMethodDecl::param_iterator PI = MDecl->param_begin(), 67989951a86b594513c2a013532ed45d197413b1087Chris Lattner E = MDecl->param_end(); PI != E; ++PI) { 68089951a86b594513c2a013532ed45d197413b1087Chris Lattner QualType ArgTy = (*PI)->getType(); 681306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian assert(!ArgTy.isNull() && "Couldn't parse type?"); 682306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian // Perform the default function/array conversion (C99 6.7.5.3p[7,8]). 683306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian // This matches the conversion that is done in 684e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner // Sema::ActOnParamDeclarator(). 685e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner if (ArgTy->isArrayType()) 686e6327747b72bb687c948270f702ff53c30f411a6Chris Lattner ArgTy = Context.getArrayDecayedType(ArgTy); 687306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian else if (ArgTy->isFunctionType()) 688306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian ArgTy = Context.getPointerType(ArgTy); 689306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian ArgTys.push_back(ArgTy); 690306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian } 691306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian T = Context.getFunctionType(T, &ArgTys[0], ArgTys.size(), 6927fb5e4888221cd36652d078c6b171ac55e7f406dArgyrios Kyrtzidis MDecl->isVariadic(), 0); 693306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian return T; 694306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian} 695306d68f5ef2eab86e0e86ebadd5a6eee1f752c0bFariborz Jahanian 6969e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 6979e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 6989e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// they point to and return true. If T1 and T2 aren't pointer types 6999e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// or pointer-to-member types, or if they are not similar at this 7009e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// level, returns false and leaves T1 and T2 unchanged. Top-level 7019e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// qualifiers on T1 and T2 are ignored. This function will typically 7029e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// be called in a loop that successively "unwraps" pointer and 7039e5e4aaf8b8835b552819d68d29b6d94115d8a0bSebastian Redl/// pointer-to-member types to compare them at each level. 704ecb81f28cb279b7d8e84296445a4131fa80b69a9Chris Lattnerbool Sema::UnwrapSimilarPointerTypes(QualType& T1, QualType& T2) { 70557373266011f73418381b736015d8d2bb0381176Douglas Gregor const PointerType *T1PtrType = T1->getAsPointerType(), 70657373266011f73418381b736015d8d2bb0381176Douglas Gregor *T2PtrType = T2->getAsPointerType(); 70757373266011f73418381b736015d8d2bb0381176Douglas Gregor if (T1PtrType && T2PtrType) { 70857373266011f73418381b736015d8d2bb0381176Douglas Gregor T1 = T1PtrType->getPointeeType(); 70957373266011f73418381b736015d8d2bb0381176Douglas Gregor T2 = T2PtrType->getPointeeType(); 71057373266011f73418381b736015d8d2bb0381176Douglas Gregor return true; 71157373266011f73418381b736015d8d2bb0381176Douglas Gregor } 71257373266011f73418381b736015d8d2bb0381176Douglas Gregor 7134433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl const MemberPointerType *T1MPType = T1->getAsMemberPointerType(), 7144433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl *T2MPType = T2->getAsMemberPointerType(); 71521593acb933324b439bc68b68e7cc7d1c3e3484dSebastian Redl if (T1MPType && T2MPType && 71621593acb933324b439bc68b68e7cc7d1c3e3484dSebastian Redl Context.getCanonicalType(T1MPType->getClass()) == 71721593acb933324b439bc68b68e7cc7d1c3e3484dSebastian Redl Context.getCanonicalType(T2MPType->getClass())) { 7184433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl T1 = T1MPType->getPointeeType(); 7194433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl T2 = T2MPType->getPointeeType(); 7204433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl return true; 7214433aafbc2591b82e4ea2fc39c723b21d2497f4dSebastian Redl } 72257373266011f73418381b736015d8d2bb0381176Douglas Gregor return false; 72357373266011f73418381b736015d8d2bb0381176Douglas Gregor} 72457373266011f73418381b736015d8d2bb0381176Douglas Gregor 725cee63fbf0e64ac526582312bf8cf33263fc5c16eSebastian RedlSema::TypeResult Sema::ActOnTypeName(Scope *S, Declarator &D) { 7265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.6: Type names have no identifier. This is already validated by 7275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the parser. 7285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(D.getIdentifier() == 0 && "Type name should have no identifier!"); 7295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 730cee63fbf0e64ac526582312bf8cf33263fc5c16eSebastian Redl QualType T = GetTypeForDeclarator(D, S); 731809070a886684cb5b92eb0e00a6581ab1fa6b17aDouglas Gregor if (T.isNull()) 732809070a886684cb5b92eb0e00a6581ab1fa6b17aDouglas Gregor return true; 7335912a3544e438a92832b8c52c13f48d4f54795dcSteve Naroff 7346d6eb57225b53fb627c565861d1d0e90645400d1Douglas Gregor // Check that there are no default arguments (C++ only). 7356d6eb57225b53fb627c565861d1d0e90645400d1Douglas Gregor if (getLangOptions().CPlusPlus) 7366d6eb57225b53fb627c565861d1d0e90645400d1Douglas Gregor CheckExtraCXXDefaultArguments(D); 7376d6eb57225b53fb627c565861d1d0e90645400d1Douglas Gregor 7385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return T.getAsOpaquePtr(); 7395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 741c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner 742c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner 743c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner//===----------------------------------------------------------------------===// 744c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner// Type Attribute Processing 745c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner//===----------------------------------------------------------------------===// 746232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner 747232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner/// HandleAddressSpaceTypeAttribute - Process an address_space attribute on the 748c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner/// specified type. The attribute contains 1 argument, the id of the address 749c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner/// space for the type. 750c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattnerstatic void HandleAddressSpaceTypeAttribute(QualType &Type, 751c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner const AttributeList &Attr, Sema &S){ 752232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner // If this type is already address space qualified, reject it. 753232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner // Clause 6.7.3 - Type qualifiers: "No type shall be qualified by qualifiers 754232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner // for two or more different address spaces." 755232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner if (Type.getAddressSpace()) { 756c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner S.Diag(Attr.getLoc(), diag::err_attribute_address_multiple_qualifiers); 757c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner return; 758232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner } 759232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner 760232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner // Check the attribute arguments. 761545dd3401e7f31c256d69cb948a45d5ca781064cChris Lattner if (Attr.getNumArgs() != 1) { 762f3a41af4d5c98a72a1d6720bbbfd658e57ef2541Chris Lattner S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; 763c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner return; 764232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner } 765545dd3401e7f31c256d69cb948a45d5ca781064cChris Lattner Expr *ASArgExpr = static_cast<Expr *>(Attr.getArg(0)); 766232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner llvm::APSInt addrSpace(32); 767c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner if (!ASArgExpr->isIntegerConstantExpr(addrSpace, S.Context)) { 768dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner S.Diag(Attr.getLoc(), diag::err_attribute_address_space_not_int) 769dcd5ef12488e4c7ea844327835896ca86b609a97Chris Lattner << ASArgExpr->getSourceRange(); 770c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner return; 771232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner } 772232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner 773232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner unsigned ASIdx = static_cast<unsigned>(addrSpace.getZExtValue()); 774f11284ac87daa613bc7b30db9f54bd716d123222Fariborz Jahanian Type = S.Context.getAddrSpaceQualType(Type, ASIdx); 775c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner} 776c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner 777d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian/// HandleObjCGCTypeAttribute - Process an objc's gc attribute on the 778d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian/// specified type. The attribute contains 1 argument, weak or strong. 779d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanianstatic void HandleObjCGCTypeAttribute(QualType &Type, 7803b6b83b8311ecdfa43cbb37ccc38c107d3b8d88bChris Lattner const AttributeList &Attr, Sema &S) { 781d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian if (Type.getObjCGCAttr() != QualType::GCNone) { 7825934e75d98d99374f72722a69c5eefe026f35c74Fariborz Jahanian S.Diag(Attr.getLoc(), diag::err_attribute_multiple_objc_gc); 783d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian return; 784d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian } 785d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian 786d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian // Check the attribute arguments. 787ba372b85524f712e5b97a176f6ce0197d365835dFariborz Jahanian if (!Attr.getParameterName()) { 788ba372b85524f712e5b97a176f6ce0197d365835dFariborz Jahanian S.Diag(Attr.getLoc(), diag::err_attribute_argument_n_not_string) 789ba372b85524f712e5b97a176f6ce0197d365835dFariborz Jahanian << "objc_gc" << 1; 790ba372b85524f712e5b97a176f6ce0197d365835dFariborz Jahanian return; 791ba372b85524f712e5b97a176f6ce0197d365835dFariborz Jahanian } 7923b6b83b8311ecdfa43cbb37ccc38c107d3b8d88bChris Lattner QualType::GCAttrTypes GCAttr; 793ba372b85524f712e5b97a176f6ce0197d365835dFariborz Jahanian if (Attr.getNumArgs() != 0) { 794d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian S.Diag(Attr.getLoc(), diag::err_attribute_wrong_number_arguments) << 1; 795d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian return; 796d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian } 797d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian if (Attr.getParameterName()->isStr("weak")) 7983b6b83b8311ecdfa43cbb37ccc38c107d3b8d88bChris Lattner GCAttr = QualType::Weak; 799d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian else if (Attr.getParameterName()->isStr("strong")) 8003b6b83b8311ecdfa43cbb37ccc38c107d3b8d88bChris Lattner GCAttr = QualType::Strong; 801d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian else { 802d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian S.Diag(Attr.getLoc(), diag::warn_attribute_type_not_supported) 803d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian << "objc_gc" << Attr.getParameterName(); 804d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian return; 805d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian } 806d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian 8073b6b83b8311ecdfa43cbb37ccc38c107d3b8d88bChris Lattner Type = S.Context.getObjCGCQualType(Type, GCAttr); 808d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian} 809d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian 810c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattnervoid Sema::ProcessTypeAttributeList(QualType &Result, const AttributeList *AL) { 811c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // Scan through and apply attributes to this type where it makes sense. Some 812c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // attributes (such as __address_space__, __vector_size__, etc) apply to the 813c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // type, but others can be present in the type specifiers even though they 814c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // apply to the decl. Here we apply type attributes and ignore the rest. 815c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner for (; AL; AL = AL->getNext()) { 816c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // If this is an attribute we can handle, do so now, otherwise, add it to 817c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner // the LeftOverAttrs list for rechaining. 818c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner switch (AL->getKind()) { 819c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner default: break; 820c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner case AttributeList::AT_address_space: 821c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner HandleAddressSpaceTypeAttribute(Result, *AL, *this); 822c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner break; 823d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian case AttributeList::AT_objc_gc: 824d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian HandleObjCGCTypeAttribute(Result, *AL, *this); 825d33d9c0cc0cfdcd0b10f35a6acdfb25da4a64f19Fariborz Jahanian break; 826c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner } 827c9b346d7b3b24f8bf940735cc812893dfcef1d4bChris Lattner } 828232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner} 829232e882226aa116807ee08a700dfc2350fbfabb1Chris Lattner 8304ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @brief If the type T is incomplete and cannot be completed, 8314ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// produce a suitable diagnostic. 8324ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 8334ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// This routine checks whether the type @p T is complete in any 8344ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// context where a complete type is required. If @p T is a complete 8354ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// type, returns false. If @p T is incomplete, issues the diagnostic 8364ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @p diag (giving it the type @p T) and returns true. 8374ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 8384ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @param Loc The location in the source that the incomplete type 8394ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// diagnostic should refer to. 8404ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 8414ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @param T The type that this routine is examining for completeness. 8424ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 8434ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @param diag The diagnostic value (e.g., 8444ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @c diag::err_typecheck_decl_incomplete_type) that will be used 8454ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// for the error message if @p T is incomplete. 8464ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 8474ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @param Range1 An optional range in the source code that will be a 8484ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// part of the "incomplete type" error message. 8494ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 8504ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @param Range2 An optional range in the source code that will be a 8514ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// part of the "incomplete type" error message. 8524ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 8534ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @param PrintType If non-NULL, the type that should be printed 8544ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// instead of @p T. This parameter should be used when the type that 8554ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// we're checking for incompleteness isn't the type that should be 8564ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// displayed to the user, e.g., when T is a type and PrintType is a 8574ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// pointer to T. 8584ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 8594ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @returns @c true if @p T is incomplete and a diagnostic was emitted, 8604ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @c false otherwise. 8614ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// 8624ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// @todo When Clang gets proper support for C++ templates, this 8634ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// routine will also be able perform template instantiation when @p T 8644ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor/// is a class template specialization. 8654ec339f43c0cae2678334850c90926bea10999c7Douglas Gregorbool Sema::DiagnoseIncompleteType(SourceLocation Loc, QualType T, unsigned diag, 8664ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor SourceRange Range1, SourceRange Range2, 8674ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor QualType PrintType) { 8684ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor // If we have a complete type, we're done. 8694ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor if (!T->isIncompleteType()) 8704ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor return false; 8714ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor 8724ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor if (PrintType.isNull()) 8734ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor PrintType = T; 8744ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor 8754ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor // We have an incomplete type. Produce a diagnostic. 8764ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor Diag(Loc, diag) << PrintType << Range1 << Range2; 8773c0eb160ca1361a82b9f15b3b40a2425adc14d0fEli Friedman 8784ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor // If the type was a forward declaration of a class/struct/union 8794ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor // type, produce 8804ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor const TagType *Tag = 0; 8814ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor if (const RecordType *Record = T->getAsRecordType()) 8824ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor Tag = Record; 8834ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor else if (const EnumType *Enum = T->getAsEnumType()) 8844ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor Tag = Enum; 8854ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor 8864ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor if (Tag && !Tag->getDecl()->isInvalidDecl()) 8874ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor Diag(Tag->getDecl()->getLocation(), 8884ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor Tag->isBeingDefined() ? diag::note_type_being_defined 8894ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor : diag::note_forward_declaration) 8904ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor << QualType(Tag, 0); 8914ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor 8924ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor return true; 8934ec339f43c0cae2678334850c90926bea10999c7Douglas Gregor} 894