ParseDecl.cpp revision edc287751a4b05e3b4d8ff2b38fa30c5b59a548b
1//===--- ParseDecl.cpp - Declaration Parsing ------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the Declaration portions of the Parser interfaces. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/Parse/Parser.h" 15#include "clang/Parse/ParseDiagnostic.h" 16#include "clang/Parse/Scope.h" 17#include "clang/Parse/Template.h" 18#include "RAIIObjectsForParser.h" 19#include "llvm/ADT/SmallSet.h" 20using namespace clang; 21 22//===----------------------------------------------------------------------===// 23// C99 6.7: Declarations. 24//===----------------------------------------------------------------------===// 25 26/// ParseTypeName 27/// type-name: [C99 6.7.6] 28/// specifier-qualifier-list abstract-declarator[opt] 29/// 30/// Called type-id in C++. 31Action::TypeResult Parser::ParseTypeName(SourceRange *Range) { 32 // Parse the common declaration-specifiers piece. 33 DeclSpec DS; 34 ParseSpecifierQualifierList(DS); 35 36 // Parse the abstract-declarator, if present. 37 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); 38 ParseDeclarator(DeclaratorInfo); 39 if (Range) 40 *Range = DeclaratorInfo.getSourceRange(); 41 42 if (DeclaratorInfo.isInvalidType()) 43 return true; 44 45 return Actions.ActOnTypeName(CurScope, DeclaratorInfo); 46} 47 48/// ParseGNUAttributes - Parse a non-empty attributes list. 49/// 50/// [GNU] attributes: 51/// attribute 52/// attributes attribute 53/// 54/// [GNU] attribute: 55/// '__attribute__' '(' '(' attribute-list ')' ')' 56/// 57/// [GNU] attribute-list: 58/// attrib 59/// attribute_list ',' attrib 60/// 61/// [GNU] attrib: 62/// empty 63/// attrib-name 64/// attrib-name '(' identifier ')' 65/// attrib-name '(' identifier ',' nonempty-expr-list ')' 66/// attrib-name '(' argument-expression-list [C99 6.5.2] ')' 67/// 68/// [GNU] attrib-name: 69/// identifier 70/// typespec 71/// typequal 72/// storageclass 73/// 74/// FIXME: The GCC grammar/code for this construct implies we need two 75/// token lookahead. Comment from gcc: "If they start with an identifier 76/// which is followed by a comma or close parenthesis, then the arguments 77/// start with that identifier; otherwise they are an expression list." 78/// 79/// At the moment, I am not doing 2 token lookahead. I am also unaware of 80/// any attributes that don't work (based on my limited testing). Most 81/// attributes are very simple in practice. Until we find a bug, I don't see 82/// a pressing need to implement the 2 token lookahead. 83 84AttributeList *Parser::ParseGNUAttributes(SourceLocation *EndLoc) { 85 assert(Tok.is(tok::kw___attribute) && "Not a GNU attribute list!"); 86 87 AttributeList *CurrAttr = 0; 88 89 while (Tok.is(tok::kw___attribute)) { 90 ConsumeToken(); 91 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, 92 "attribute")) { 93 SkipUntil(tok::r_paren, true); // skip until ) or ; 94 return CurrAttr; 95 } 96 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, "(")) { 97 SkipUntil(tok::r_paren, true); // skip until ) or ; 98 return CurrAttr; 99 } 100 // Parse the attribute-list. e.g. __attribute__(( weak, alias("__f") )) 101 while (Tok.is(tok::identifier) || isDeclarationSpecifier() || 102 Tok.is(tok::comma)) { 103 104 if (Tok.is(tok::comma)) { 105 // allows for empty/non-empty attributes. ((__vector_size__(16),,,,)) 106 ConsumeToken(); 107 continue; 108 } 109 // we have an identifier or declaration specifier (const, int, etc.) 110 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 111 SourceLocation AttrNameLoc = ConsumeToken(); 112 113 // check if we have a "parameterized" attribute 114 if (Tok.is(tok::l_paren)) { 115 ConsumeParen(); // ignore the left paren loc for now 116 117 if (Tok.is(tok::identifier)) { 118 IdentifierInfo *ParmName = Tok.getIdentifierInfo(); 119 SourceLocation ParmLoc = ConsumeToken(); 120 121 if (Tok.is(tok::r_paren)) { 122 // __attribute__(( mode(byte) )) 123 ConsumeParen(); // ignore the right paren loc for now 124 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, AttrNameLoc, 125 ParmName, ParmLoc, 0, 0, CurrAttr); 126 } else if (Tok.is(tok::comma)) { 127 ConsumeToken(); 128 // __attribute__(( format(printf, 1, 2) )) 129 ExprVector ArgExprs(Actions); 130 bool ArgExprsOk = true; 131 132 // now parse the non-empty comma separated list of expressions 133 while (1) { 134 OwningExprResult ArgExpr(ParseAssignmentExpression()); 135 if (ArgExpr.isInvalid()) { 136 ArgExprsOk = false; 137 SkipUntil(tok::r_paren); 138 break; 139 } else { 140 ArgExprs.push_back(ArgExpr.release()); 141 } 142 if (Tok.isNot(tok::comma)) 143 break; 144 ConsumeToken(); // Eat the comma, move to the next argument 145 } 146 if (ArgExprsOk && Tok.is(tok::r_paren)) { 147 ConsumeParen(); // ignore the right paren loc for now 148 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, 149 AttrNameLoc, ParmName, ParmLoc, 150 ArgExprs.take(), ArgExprs.size(), 151 CurrAttr); 152 } 153 } 154 } else { // not an identifier 155 switch (Tok.getKind()) { 156 case tok::r_paren: 157 // parse a possibly empty comma separated list of expressions 158 // __attribute__(( nonnull() )) 159 ConsumeParen(); // ignore the right paren loc for now 160 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, AttrNameLoc, 161 0, SourceLocation(), 0, 0, CurrAttr); 162 break; 163 case tok::kw_char: 164 case tok::kw_wchar_t: 165 case tok::kw_char16_t: 166 case tok::kw_char32_t: 167 case tok::kw_bool: 168 case tok::kw_short: 169 case tok::kw_int: 170 case tok::kw_long: 171 case tok::kw_signed: 172 case tok::kw_unsigned: 173 case tok::kw_float: 174 case tok::kw_double: 175 case tok::kw_void: 176 case tok::kw_typeof: 177 // If it's a builtin type name, eat it and expect a rparen 178 // __attribute__(( vec_type_hint(char) )) 179 ConsumeToken(); 180 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, AttrNameLoc, 181 0, SourceLocation(), 0, 0, CurrAttr); 182 if (Tok.is(tok::r_paren)) 183 ConsumeParen(); 184 break; 185 default: 186 // __attribute__(( aligned(16) )) 187 ExprVector ArgExprs(Actions); 188 bool ArgExprsOk = true; 189 190 // now parse the list of expressions 191 while (1) { 192 OwningExprResult ArgExpr(ParseAssignmentExpression()); 193 if (ArgExpr.isInvalid()) { 194 ArgExprsOk = false; 195 SkipUntil(tok::r_paren); 196 break; 197 } else { 198 ArgExprs.push_back(ArgExpr.release()); 199 } 200 if (Tok.isNot(tok::comma)) 201 break; 202 ConsumeToken(); // Eat the comma, move to the next argument 203 } 204 // Match the ')'. 205 if (ArgExprsOk && Tok.is(tok::r_paren)) { 206 ConsumeParen(); // ignore the right paren loc for now 207 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, 208 AttrNameLoc, 0, SourceLocation(), ArgExprs.take(), 209 ArgExprs.size(), 210 CurrAttr); 211 } 212 break; 213 } 214 } 215 } else { 216 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, AttrNameLoc, 217 0, SourceLocation(), 0, 0, CurrAttr); 218 } 219 } 220 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) 221 SkipUntil(tok::r_paren, false); 222 SourceLocation Loc = Tok.getLocation(); 223 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) { 224 SkipUntil(tok::r_paren, false); 225 } 226 if (EndLoc) 227 *EndLoc = Loc; 228 } 229 return CurrAttr; 230} 231 232/// ParseMicrosoftDeclSpec - Parse an __declspec construct 233/// 234/// [MS] decl-specifier: 235/// __declspec ( extended-decl-modifier-seq ) 236/// 237/// [MS] extended-decl-modifier-seq: 238/// extended-decl-modifier[opt] 239/// extended-decl-modifier extended-decl-modifier-seq 240 241AttributeList* Parser::ParseMicrosoftDeclSpec(AttributeList *CurrAttr) { 242 assert(Tok.is(tok::kw___declspec) && "Not a declspec!"); 243 244 ConsumeToken(); 245 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, 246 "declspec")) { 247 SkipUntil(tok::r_paren, true); // skip until ) or ; 248 return CurrAttr; 249 } 250 while (Tok.getIdentifierInfo()) { 251 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 252 SourceLocation AttrNameLoc = ConsumeToken(); 253 if (Tok.is(tok::l_paren)) { 254 ConsumeParen(); 255 // FIXME: This doesn't parse __declspec(property(get=get_func_name)) 256 // correctly. 257 OwningExprResult ArgExpr(ParseAssignmentExpression()); 258 if (!ArgExpr.isInvalid()) { 259 ExprTy* ExprList = ArgExpr.take(); 260 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, AttrNameLoc, 0, 261 SourceLocation(), &ExprList, 1, 262 CurrAttr, true); 263 } 264 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) 265 SkipUntil(tok::r_paren, false); 266 } else { 267 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, AttrNameLoc, 268 0, SourceLocation(), 0, 0, CurrAttr, true); 269 } 270 } 271 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) 272 SkipUntil(tok::r_paren, false); 273 return CurrAttr; 274} 275 276AttributeList* Parser::ParseMicrosoftTypeAttributes(AttributeList *CurrAttr) { 277 // Treat these like attributes 278 // FIXME: Allow Sema to distinguish between these and real attributes! 279 while (Tok.is(tok::kw___fastcall) || Tok.is(tok::kw___stdcall) || 280 Tok.is(tok::kw___cdecl) || Tok.is(tok::kw___ptr64) || 281 Tok.is(tok::kw___w64)) { 282 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 283 SourceLocation AttrNameLoc = ConsumeToken(); 284 if (Tok.is(tok::kw___ptr64) || Tok.is(tok::kw___w64)) 285 // FIXME: Support these properly! 286 continue; 287 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, AttrNameLoc, 0, 288 SourceLocation(), 0, 0, CurrAttr, true); 289 } 290 return CurrAttr; 291} 292 293/// ParseDeclaration - Parse a full 'declaration', which consists of 294/// declaration-specifiers, some number of declarators, and a semicolon. 295/// 'Context' should be a Declarator::TheContext value. This returns the 296/// location of the semicolon in DeclEnd. 297/// 298/// declaration: [C99 6.7] 299/// block-declaration -> 300/// simple-declaration 301/// others [FIXME] 302/// [C++] template-declaration 303/// [C++] namespace-definition 304/// [C++] using-directive 305/// [C++] using-declaration 306/// [C++0x] static_assert-declaration 307/// others... [FIXME] 308/// 309Parser::DeclGroupPtrTy Parser::ParseDeclaration(unsigned Context, 310 SourceLocation &DeclEnd, 311 CXX0XAttributeList Attr) { 312 DeclPtrTy SingleDecl; 313 switch (Tok.getKind()) { 314 case tok::kw_template: 315 case tok::kw_export: 316 if (Attr.HasAttr) 317 Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) 318 << Attr.Range; 319 SingleDecl = ParseDeclarationStartingWithTemplate(Context, DeclEnd); 320 break; 321 case tok::kw_namespace: 322 if (Attr.HasAttr) 323 Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) 324 << Attr.Range; 325 SingleDecl = ParseNamespace(Context, DeclEnd); 326 break; 327 case tok::kw_using: 328 SingleDecl = ParseUsingDirectiveOrDeclaration(Context, DeclEnd, Attr); 329 break; 330 case tok::kw_static_assert: 331 if (Attr.HasAttr) 332 Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) 333 << Attr.Range; 334 SingleDecl = ParseStaticAssertDeclaration(DeclEnd); 335 break; 336 default: 337 return ParseSimpleDeclaration(Context, DeclEnd, Attr.AttrList, true); 338 } 339 340 // This routine returns a DeclGroup, if the thing we parsed only contains a 341 // single decl, convert it now. 342 return Actions.ConvertDeclToDeclGroup(SingleDecl); 343} 344 345/// simple-declaration: [C99 6.7: declaration] [C++ 7p1: dcl.dcl] 346/// declaration-specifiers init-declarator-list[opt] ';' 347///[C90/C++]init-declarator-list ';' [TODO] 348/// [OMP] threadprivate-directive [TODO] 349/// 350/// If RequireSemi is false, this does not check for a ';' at the end of the 351/// declaration. If it is true, it checks for and eats it. 352Parser::DeclGroupPtrTy Parser::ParseSimpleDeclaration(unsigned Context, 353 SourceLocation &DeclEnd, 354 AttributeList *Attr, 355 bool RequireSemi) { 356 // Parse the common declaration-specifiers piece. 357 ParsingDeclSpec DS(*this); 358 if (Attr) 359 DS.AddAttributes(Attr); 360 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS_none, 361 getDeclSpecContextFromDeclaratorContext(Context)); 362 363 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 364 // declaration-specifiers init-declarator-list[opt] ';' 365 if (Tok.is(tok::semi)) { 366 if (RequireSemi) ConsumeToken(); 367 DeclPtrTy TheDecl = Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 368 DS.complete(TheDecl); 369 return Actions.ConvertDeclToDeclGroup(TheDecl); 370 } 371 372 return ParseDeclGroup(DS, Context, /*FunctionDefs=*/ false, &DeclEnd); 373} 374 375/// ParseDeclGroup - Having concluded that this is either a function 376/// definition or a group of object declarations, actually parse the 377/// result. 378Parser::DeclGroupPtrTy Parser::ParseDeclGroup(ParsingDeclSpec &DS, 379 unsigned Context, 380 bool AllowFunctionDefinitions, 381 SourceLocation *DeclEnd) { 382 // Parse the first declarator. 383 ParsingDeclarator D(*this, DS, static_cast<Declarator::TheContext>(Context)); 384 ParseDeclarator(D); 385 386 // Bail out if the first declarator didn't seem well-formed. 387 if (!D.hasName() && !D.mayOmitIdentifier()) { 388 // Skip until ; or }. 389 SkipUntil(tok::r_brace, true, true); 390 if (Tok.is(tok::semi)) 391 ConsumeToken(); 392 return DeclGroupPtrTy(); 393 } 394 395 if (AllowFunctionDefinitions && D.isFunctionDeclarator()) { 396 if (isDeclarationAfterDeclarator()) { 397 // Fall though. We have to check this first, though, because 398 // __attribute__ might be the start of a function definition in 399 // (extended) K&R C. 400 } else if (isStartOfFunctionDefinition()) { 401 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 402 Diag(Tok, diag::err_function_declared_typedef); 403 404 // Recover by treating the 'typedef' as spurious. 405 DS.ClearStorageClassSpecs(); 406 } 407 408 DeclPtrTy TheDecl = ParseFunctionDefinition(D); 409 return Actions.ConvertDeclToDeclGroup(TheDecl); 410 } else { 411 Diag(Tok, diag::err_expected_fn_body); 412 SkipUntil(tok::semi); 413 return DeclGroupPtrTy(); 414 } 415 } 416 417 llvm::SmallVector<DeclPtrTy, 8> DeclsInGroup; 418 DeclPtrTy FirstDecl = ParseDeclarationAfterDeclarator(D); 419 D.complete(FirstDecl); 420 if (FirstDecl.get()) 421 DeclsInGroup.push_back(FirstDecl); 422 423 // If we don't have a comma, it is either the end of the list (a ';') or an 424 // error, bail out. 425 while (Tok.is(tok::comma)) { 426 // Consume the comma. 427 ConsumeToken(); 428 429 // Parse the next declarator. 430 D.clear(); 431 432 // Accept attributes in an init-declarator. In the first declarator in a 433 // declaration, these would be part of the declspec. In subsequent 434 // declarators, they become part of the declarator itself, so that they 435 // don't apply to declarators after *this* one. Examples: 436 // short __attribute__((common)) var; -> declspec 437 // short var __attribute__((common)); -> declarator 438 // short x, __attribute__((common)) var; -> declarator 439 if (Tok.is(tok::kw___attribute)) { 440 SourceLocation Loc; 441 AttributeList *AttrList = ParseGNUAttributes(&Loc); 442 D.AddAttributes(AttrList, Loc); 443 } 444 445 ParseDeclarator(D); 446 447 DeclPtrTy ThisDecl = ParseDeclarationAfterDeclarator(D); 448 D.complete(ThisDecl); 449 if (ThisDecl.get()) 450 DeclsInGroup.push_back(ThisDecl); 451 } 452 453 if (DeclEnd) 454 *DeclEnd = Tok.getLocation(); 455 456 if (Context != Declarator::ForContext && 457 ExpectAndConsume(tok::semi, 458 Context == Declarator::FileContext 459 ? diag::err_invalid_token_after_toplevel_declarator 460 : diag::err_expected_semi_declaration)) { 461 SkipUntil(tok::r_brace, true, true); 462 if (Tok.is(tok::semi)) 463 ConsumeToken(); 464 } 465 466 return Actions.FinalizeDeclaratorGroup(CurScope, DS, 467 DeclsInGroup.data(), 468 DeclsInGroup.size()); 469} 470 471/// \brief Parse 'declaration' after parsing 'declaration-specifiers 472/// declarator'. This method parses the remainder of the declaration 473/// (including any attributes or initializer, among other things) and 474/// finalizes the declaration. 475/// 476/// init-declarator: [C99 6.7] 477/// declarator 478/// declarator '=' initializer 479/// [GNU] declarator simple-asm-expr[opt] attributes[opt] 480/// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer 481/// [C++] declarator initializer[opt] 482/// 483/// [C++] initializer: 484/// [C++] '=' initializer-clause 485/// [C++] '(' expression-list ')' 486/// [C++0x] '=' 'default' [TODO] 487/// [C++0x] '=' 'delete' 488/// 489/// According to the standard grammar, =default and =delete are function 490/// definitions, but that definitely doesn't fit with the parser here. 491/// 492Parser::DeclPtrTy Parser::ParseDeclarationAfterDeclarator(Declarator &D, 493 const ParsedTemplateInfo &TemplateInfo) { 494 // If a simple-asm-expr is present, parse it. 495 if (Tok.is(tok::kw_asm)) { 496 SourceLocation Loc; 497 OwningExprResult AsmLabel(ParseSimpleAsm(&Loc)); 498 if (AsmLabel.isInvalid()) { 499 SkipUntil(tok::semi, true, true); 500 return DeclPtrTy(); 501 } 502 503 D.setAsmLabel(AsmLabel.release()); 504 D.SetRangeEnd(Loc); 505 } 506 507 // If attributes are present, parse them. 508 if (Tok.is(tok::kw___attribute)) { 509 SourceLocation Loc; 510 AttributeList *AttrList = ParseGNUAttributes(&Loc); 511 D.AddAttributes(AttrList, Loc); 512 } 513 514 // Inform the current actions module that we just parsed this declarator. 515 DeclPtrTy ThisDecl; 516 switch (TemplateInfo.Kind) { 517 case ParsedTemplateInfo::NonTemplate: 518 ThisDecl = Actions.ActOnDeclarator(CurScope, D); 519 break; 520 521 case ParsedTemplateInfo::Template: 522 case ParsedTemplateInfo::ExplicitSpecialization: 523 ThisDecl = Actions.ActOnTemplateDeclarator(CurScope, 524 Action::MultiTemplateParamsArg(Actions, 525 TemplateInfo.TemplateParams->data(), 526 TemplateInfo.TemplateParams->size()), 527 D); 528 break; 529 530 case ParsedTemplateInfo::ExplicitInstantiation: { 531 Action::DeclResult ThisRes 532 = Actions.ActOnExplicitInstantiation(CurScope, 533 TemplateInfo.ExternLoc, 534 TemplateInfo.TemplateLoc, 535 D); 536 if (ThisRes.isInvalid()) { 537 SkipUntil(tok::semi, true, true); 538 return DeclPtrTy(); 539 } 540 541 ThisDecl = ThisRes.get(); 542 break; 543 } 544 } 545 546 // Parse declarator '=' initializer. 547 if (Tok.is(tok::equal)) { 548 ConsumeToken(); 549 if (getLang().CPlusPlus0x && Tok.is(tok::kw_delete)) { 550 SourceLocation DelLoc = ConsumeToken(); 551 Actions.SetDeclDeleted(ThisDecl, DelLoc); 552 } else { 553 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 554 EnterScope(0); 555 Actions.ActOnCXXEnterDeclInitializer(CurScope, ThisDecl); 556 } 557 558 OwningExprResult Init(ParseInitializer()); 559 560 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 561 Actions.ActOnCXXExitDeclInitializer(CurScope, ThisDecl); 562 ExitScope(); 563 } 564 565 if (Init.isInvalid()) { 566 SkipUntil(tok::comma, true, true); 567 Actions.ActOnInitializerError(ThisDecl); 568 } else 569 Actions.AddInitializerToDecl(ThisDecl, move(Init)); 570 } 571 } else if (Tok.is(tok::l_paren)) { 572 // Parse C++ direct initializer: '(' expression-list ')' 573 SourceLocation LParenLoc = ConsumeParen(); 574 ExprVector Exprs(Actions); 575 CommaLocsTy CommaLocs; 576 577 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 578 EnterScope(0); 579 Actions.ActOnCXXEnterDeclInitializer(CurScope, ThisDecl); 580 } 581 582 if (ParseExpressionList(Exprs, CommaLocs)) { 583 SkipUntil(tok::r_paren); 584 585 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 586 Actions.ActOnCXXExitDeclInitializer(CurScope, ThisDecl); 587 ExitScope(); 588 } 589 } else { 590 // Match the ')'. 591 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 592 593 assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() && 594 "Unexpected number of commas!"); 595 596 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 597 Actions.ActOnCXXExitDeclInitializer(CurScope, ThisDecl); 598 ExitScope(); 599 } 600 601 Actions.AddCXXDirectInitializerToDecl(ThisDecl, LParenLoc, 602 move_arg(Exprs), 603 CommaLocs.data(), RParenLoc); 604 } 605 } else { 606 bool TypeContainsUndeducedAuto = 607 D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto; 608 Actions.ActOnUninitializedDecl(ThisDecl, TypeContainsUndeducedAuto); 609 } 610 611 return ThisDecl; 612} 613 614/// ParseSpecifierQualifierList 615/// specifier-qualifier-list: 616/// type-specifier specifier-qualifier-list[opt] 617/// type-qualifier specifier-qualifier-list[opt] 618/// [GNU] attributes specifier-qualifier-list[opt] 619/// 620void Parser::ParseSpecifierQualifierList(DeclSpec &DS) { 621 /// specifier-qualifier-list is a subset of declaration-specifiers. Just 622 /// parse declaration-specifiers and complain about extra stuff. 623 ParseDeclarationSpecifiers(DS); 624 625 // Validate declspec for type-name. 626 unsigned Specs = DS.getParsedSpecifiers(); 627 if (Specs == DeclSpec::PQ_None && !DS.getNumProtocolQualifiers() && 628 !DS.getAttributes()) 629 Diag(Tok, diag::err_typename_requires_specqual); 630 631 // Issue diagnostic and remove storage class if present. 632 if (Specs & DeclSpec::PQ_StorageClassSpecifier) { 633 if (DS.getStorageClassSpecLoc().isValid()) 634 Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass); 635 else 636 Diag(DS.getThreadSpecLoc(), diag::err_typename_invalid_storageclass); 637 DS.ClearStorageClassSpecs(); 638 } 639 640 // Issue diagnostic and remove function specfier if present. 641 if (Specs & DeclSpec::PQ_FunctionSpecifier) { 642 if (DS.isInlineSpecified()) 643 Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec); 644 if (DS.isVirtualSpecified()) 645 Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec); 646 if (DS.isExplicitSpecified()) 647 Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec); 648 DS.ClearFunctionSpecs(); 649 } 650} 651 652/// isValidAfterIdentifierInDeclaratorAfterDeclSpec - Return true if the 653/// specified token is valid after the identifier in a declarator which 654/// immediately follows the declspec. For example, these things are valid: 655/// 656/// int x [ 4]; // direct-declarator 657/// int x ( int y); // direct-declarator 658/// int(int x ) // direct-declarator 659/// int x ; // simple-declaration 660/// int x = 17; // init-declarator-list 661/// int x , y; // init-declarator-list 662/// int x __asm__ ("foo"); // init-declarator-list 663/// int x : 4; // struct-declarator 664/// int x { 5}; // C++'0x unified initializers 665/// 666/// This is not, because 'x' does not immediately follow the declspec (though 667/// ')' happens to be valid anyway). 668/// int (x) 669/// 670static bool isValidAfterIdentifierInDeclarator(const Token &T) { 671 return T.is(tok::l_square) || T.is(tok::l_paren) || T.is(tok::r_paren) || 672 T.is(tok::semi) || T.is(tok::comma) || T.is(tok::equal) || 673 T.is(tok::kw_asm) || T.is(tok::l_brace) || T.is(tok::colon); 674} 675 676 677/// ParseImplicitInt - This method is called when we have an non-typename 678/// identifier in a declspec (which normally terminates the decl spec) when 679/// the declspec has no type specifier. In this case, the declspec is either 680/// malformed or is "implicit int" (in K&R and C89). 681/// 682/// This method handles diagnosing this prettily and returns false if the 683/// declspec is done being processed. If it recovers and thinks there may be 684/// other pieces of declspec after it, it returns true. 685/// 686bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS, 687 const ParsedTemplateInfo &TemplateInfo, 688 AccessSpecifier AS) { 689 assert(Tok.is(tok::identifier) && "should have identifier"); 690 691 SourceLocation Loc = Tok.getLocation(); 692 // If we see an identifier that is not a type name, we normally would 693 // parse it as the identifer being declared. However, when a typename 694 // is typo'd or the definition is not included, this will incorrectly 695 // parse the typename as the identifier name and fall over misparsing 696 // later parts of the diagnostic. 697 // 698 // As such, we try to do some look-ahead in cases where this would 699 // otherwise be an "implicit-int" case to see if this is invalid. For 700 // example: "static foo_t x = 4;" In this case, if we parsed foo_t as 701 // an identifier with implicit int, we'd get a parse error because the 702 // next token is obviously invalid for a type. Parse these as a case 703 // with an invalid type specifier. 704 assert(!DS.hasTypeSpecifier() && "Type specifier checked above"); 705 706 // Since we know that this either implicit int (which is rare) or an 707 // error, we'd do lookahead to try to do better recovery. 708 if (isValidAfterIdentifierInDeclarator(NextToken())) { 709 // If this token is valid for implicit int, e.g. "static x = 4", then 710 // we just avoid eating the identifier, so it will be parsed as the 711 // identifier in the declarator. 712 return false; 713 } 714 715 // Otherwise, if we don't consume this token, we are going to emit an 716 // error anyway. Try to recover from various common problems. Check 717 // to see if this was a reference to a tag name without a tag specified. 718 // This is a common problem in C (saying 'foo' instead of 'struct foo'). 719 // 720 // C++ doesn't need this, and isTagName doesn't take SS. 721 if (SS == 0) { 722 const char *TagName = 0; 723 tok::TokenKind TagKind = tok::unknown; 724 725 switch (Actions.isTagName(*Tok.getIdentifierInfo(), CurScope)) { 726 default: break; 727 case DeclSpec::TST_enum: TagName="enum" ;TagKind=tok::kw_enum ;break; 728 case DeclSpec::TST_union: TagName="union" ;TagKind=tok::kw_union ;break; 729 case DeclSpec::TST_struct:TagName="struct";TagKind=tok::kw_struct;break; 730 case DeclSpec::TST_class: TagName="class" ;TagKind=tok::kw_class ;break; 731 } 732 733 if (TagName) { 734 Diag(Loc, diag::err_use_of_tag_name_without_tag) 735 << Tok.getIdentifierInfo() << TagName << getLang().CPlusPlus 736 << FixItHint::CreateInsertion(Tok.getLocation(),TagName); 737 738 // Parse this as a tag as if the missing tag were present. 739 if (TagKind == tok::kw_enum) 740 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS); 741 else 742 ParseClassSpecifier(TagKind, Loc, DS, TemplateInfo, AS); 743 return true; 744 } 745 } 746 747 // This is almost certainly an invalid type name. Let the action emit a 748 // diagnostic and attempt to recover. 749 Action::TypeTy *T = 0; 750 if (Actions.DiagnoseUnknownTypeName(*Tok.getIdentifierInfo(), Loc, 751 CurScope, SS, T)) { 752 // The action emitted a diagnostic, so we don't have to. 753 if (T) { 754 // The action has suggested that the type T could be used. Set that as 755 // the type in the declaration specifiers, consume the would-be type 756 // name token, and we're done. 757 const char *PrevSpec; 758 unsigned DiagID; 759 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, T, 760 false); 761 DS.SetRangeEnd(Tok.getLocation()); 762 ConsumeToken(); 763 764 // There may be other declaration specifiers after this. 765 return true; 766 } 767 768 // Fall through; the action had no suggestion for us. 769 } else { 770 // The action did not emit a diagnostic, so emit one now. 771 SourceRange R; 772 if (SS) R = SS->getRange(); 773 Diag(Loc, diag::err_unknown_typename) << Tok.getIdentifierInfo() << R; 774 } 775 776 // Mark this as an error. 777 const char *PrevSpec; 778 unsigned DiagID; 779 DS.SetTypeSpecType(DeclSpec::TST_error, Loc, PrevSpec, DiagID); 780 DS.SetRangeEnd(Tok.getLocation()); 781 ConsumeToken(); 782 783 // TODO: Could inject an invalid typedef decl in an enclosing scope to 784 // avoid rippling error messages on subsequent uses of the same type, 785 // could be useful if #include was forgotten. 786 return false; 787} 788 789/// \brief Determine the declaration specifier context from the declarator 790/// context. 791/// 792/// \param Context the declarator context, which is one of the 793/// Declarator::TheContext enumerator values. 794Parser::DeclSpecContext 795Parser::getDeclSpecContextFromDeclaratorContext(unsigned Context) { 796 if (Context == Declarator::MemberContext) 797 return DSC_class; 798 if (Context == Declarator::FileContext) 799 return DSC_top_level; 800 return DSC_normal; 801} 802 803/// ParseDeclarationSpecifiers 804/// declaration-specifiers: [C99 6.7] 805/// storage-class-specifier declaration-specifiers[opt] 806/// type-specifier declaration-specifiers[opt] 807/// [C99] function-specifier declaration-specifiers[opt] 808/// [GNU] attributes declaration-specifiers[opt] 809/// 810/// storage-class-specifier: [C99 6.7.1] 811/// 'typedef' 812/// 'extern' 813/// 'static' 814/// 'auto' 815/// 'register' 816/// [C++] 'mutable' 817/// [GNU] '__thread' 818/// function-specifier: [C99 6.7.4] 819/// [C99] 'inline' 820/// [C++] 'virtual' 821/// [C++] 'explicit' 822/// 'friend': [C++ dcl.friend] 823/// 'constexpr': [C++0x dcl.constexpr] 824 825/// 826void Parser::ParseDeclarationSpecifiers(DeclSpec &DS, 827 const ParsedTemplateInfo &TemplateInfo, 828 AccessSpecifier AS, 829 DeclSpecContext DSContext) { 830 if (Tok.is(tok::code_completion)) { 831 Action::CodeCompletionContext CCC = Action::CCC_Namespace; 832 if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) 833 CCC = DSContext == DSC_class? Action::CCC_MemberTemplate 834 : Action::CCC_Template; 835 else if (DSContext == DSC_class) 836 CCC = Action::CCC_Class; 837 else if (ObjCImpDecl) 838 CCC = Action::CCC_ObjCImplementation; 839 840 Actions.CodeCompleteOrdinaryName(CurScope, CCC); 841 ConsumeToken(); 842 } 843 844 DS.SetRangeStart(Tok.getLocation()); 845 while (1) { 846 bool isInvalid = false; 847 const char *PrevSpec = 0; 848 unsigned DiagID = 0; 849 850 SourceLocation Loc = Tok.getLocation(); 851 852 switch (Tok.getKind()) { 853 default: 854 DoneWithDeclSpec: 855 // If this is not a declaration specifier token, we're done reading decl 856 // specifiers. First verify that DeclSpec's are consistent. 857 DS.Finish(Diags, PP); 858 return; 859 860 case tok::coloncolon: // ::foo::bar 861 // C++ scope specifier. Annotate and loop, or bail out on error. 862 if (TryAnnotateCXXScopeToken(true)) { 863 if (!DS.hasTypeSpecifier()) 864 DS.SetTypeSpecError(); 865 goto DoneWithDeclSpec; 866 } 867 if (Tok.is(tok::coloncolon)) // ::new or ::delete 868 goto DoneWithDeclSpec; 869 continue; 870 871 case tok::annot_cxxscope: { 872 if (DS.hasTypeSpecifier()) 873 goto DoneWithDeclSpec; 874 875 CXXScopeSpec SS; 876 SS.setScopeRep(Tok.getAnnotationValue()); 877 SS.setRange(Tok.getAnnotationRange()); 878 879 // We are looking for a qualified typename. 880 Token Next = NextToken(); 881 if (Next.is(tok::annot_template_id) && 882 static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()) 883 ->Kind == TNK_Type_template) { 884 // We have a qualified template-id, e.g., N::A<int> 885 886 // C++ [class.qual]p2: 887 // In a lookup in which the constructor is an acceptable lookup 888 // result and the nested-name-specifier nominates a class C: 889 // 890 // - if the name specified after the 891 // nested-name-specifier, when looked up in C, is the 892 // injected-class-name of C (Clause 9), or 893 // 894 // - if the name specified after the nested-name-specifier 895 // is the same as the identifier or the 896 // simple-template-id's template-name in the last 897 // component of the nested-name-specifier, 898 // 899 // the name is instead considered to name the constructor of 900 // class C. 901 // 902 // Thus, if the template-name is actually the constructor 903 // name, then the code is ill-formed; this interpretation is 904 // reinforced by the NAD status of core issue 635. 905 TemplateIdAnnotation *TemplateId 906 = static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()); 907 if (DSContext == DSC_top_level && TemplateId->Name && 908 Actions.isCurrentClassName(*TemplateId->Name, CurScope, &SS)) { 909 if (isConstructorDeclarator()) { 910 // The user meant this to be an out-of-line constructor 911 // definition, but template arguments are not allowed 912 // there. Just allow this as a constructor; we'll 913 // complain about it later. 914 goto DoneWithDeclSpec; 915 } 916 917 // The user meant this to name a type, but it actually names 918 // a constructor with some extraneous template 919 // arguments. Complain, then parse it as a type as the user 920 // intended. 921 Diag(TemplateId->TemplateNameLoc, 922 diag::err_out_of_line_template_id_names_constructor) 923 << TemplateId->Name; 924 } 925 926 DS.getTypeSpecScope() = SS; 927 ConsumeToken(); // The C++ scope. 928 assert(Tok.is(tok::annot_template_id) && 929 "ParseOptionalCXXScopeSpecifier not working"); 930 AnnotateTemplateIdTokenAsType(&SS); 931 continue; 932 } 933 934 if (Next.is(tok::annot_typename)) { 935 DS.getTypeSpecScope() = SS; 936 ConsumeToken(); // The C++ scope. 937 if (Tok.getAnnotationValue()) 938 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, 939 PrevSpec, DiagID, 940 Tok.getAnnotationValue()); 941 else 942 DS.SetTypeSpecError(); 943 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 944 ConsumeToken(); // The typename 945 } 946 947 if (Next.isNot(tok::identifier)) 948 goto DoneWithDeclSpec; 949 950 // If we're in a context where the identifier could be a class name, 951 // check whether this is a constructor declaration. 952 if (DSContext == DSC_top_level && 953 Actions.isCurrentClassName(*Next.getIdentifierInfo(), CurScope, 954 &SS)) { 955 if (isConstructorDeclarator()) 956 goto DoneWithDeclSpec; 957 958 // As noted in C++ [class.qual]p2 (cited above), when the name 959 // of the class is qualified in a context where it could name 960 // a constructor, its a constructor name. However, we've 961 // looked at the declarator, and the user probably meant this 962 // to be a type. Complain that it isn't supposed to be treated 963 // as a type, then proceed to parse it as a type. 964 Diag(Next.getLocation(), diag::err_out_of_line_type_names_constructor) 965 << Next.getIdentifierInfo(); 966 } 967 968 TypeTy *TypeRep = Actions.getTypeName(*Next.getIdentifierInfo(), 969 Next.getLocation(), CurScope, &SS); 970 971 // If the referenced identifier is not a type, then this declspec is 972 // erroneous: We already checked about that it has no type specifier, and 973 // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the 974 // typename. 975 if (TypeRep == 0) { 976 ConsumeToken(); // Eat the scope spec so the identifier is current. 977 if (ParseImplicitInt(DS, &SS, TemplateInfo, AS)) continue; 978 goto DoneWithDeclSpec; 979 } 980 981 DS.getTypeSpecScope() = SS; 982 ConsumeToken(); // The C++ scope. 983 984 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 985 DiagID, TypeRep); 986 if (isInvalid) 987 break; 988 989 DS.SetRangeEnd(Tok.getLocation()); 990 ConsumeToken(); // The typename. 991 992 continue; 993 } 994 995 case tok::annot_typename: { 996 if (Tok.getAnnotationValue()) 997 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 998 DiagID, Tok.getAnnotationValue()); 999 else 1000 DS.SetTypeSpecError(); 1001 1002 if (isInvalid) 1003 break; 1004 1005 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 1006 ConsumeToken(); // The typename 1007 1008 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1009 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1010 // Objective-C interface. If we don't have Objective-C or a '<', this is 1011 // just a normal reference to a typedef name. 1012 if (!Tok.is(tok::less) || !getLang().ObjC1) 1013 continue; 1014 1015 SourceLocation LAngleLoc, EndProtoLoc; 1016 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1017 llvm::SmallVector<SourceLocation, 8> ProtocolLocs; 1018 ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false, 1019 LAngleLoc, EndProtoLoc); 1020 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(), 1021 ProtocolLocs.data(), LAngleLoc); 1022 1023 DS.SetRangeEnd(EndProtoLoc); 1024 continue; 1025 } 1026 1027 // typedef-name 1028 case tok::identifier: { 1029 // In C++, check to see if this is a scope specifier like foo::bar::, if 1030 // so handle it as such. This is important for ctor parsing. 1031 if (getLang().CPlusPlus) { 1032 if (TryAnnotateCXXScopeToken(true)) { 1033 if (!DS.hasTypeSpecifier()) 1034 DS.SetTypeSpecError(); 1035 goto DoneWithDeclSpec; 1036 } 1037 if (!Tok.is(tok::identifier)) 1038 continue; 1039 } 1040 1041 // This identifier can only be a typedef name if we haven't already seen 1042 // a type-specifier. Without this check we misparse: 1043 // typedef int X; struct Y { short X; }; as 'short int'. 1044 if (DS.hasTypeSpecifier()) 1045 goto DoneWithDeclSpec; 1046 1047 // Check for need to substitute AltiVec keyword tokens. 1048 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid)) 1049 break; 1050 1051 // It has to be available as a typedef too! 1052 TypeTy *TypeRep = Actions.getTypeName(*Tok.getIdentifierInfo(), 1053 Tok.getLocation(), CurScope); 1054 1055 // If this is not a typedef name, don't parse it as part of the declspec, 1056 // it must be an implicit int or an error. 1057 if (TypeRep == 0) { 1058 if (ParseImplicitInt(DS, 0, TemplateInfo, AS)) continue; 1059 goto DoneWithDeclSpec; 1060 } 1061 1062 // If we're in a context where the identifier could be a class name, 1063 // check whether this is a constructor declaration. 1064 if (getLang().CPlusPlus && DSContext == DSC_class && 1065 Actions.isCurrentClassName(*Tok.getIdentifierInfo(), CurScope) && 1066 isConstructorDeclarator()) 1067 goto DoneWithDeclSpec; 1068 1069 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1070 DiagID, TypeRep); 1071 if (isInvalid) 1072 break; 1073 1074 DS.SetRangeEnd(Tok.getLocation()); 1075 ConsumeToken(); // The identifier 1076 1077 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1078 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1079 // Objective-C interface. If we don't have Objective-C or a '<', this is 1080 // just a normal reference to a typedef name. 1081 if (!Tok.is(tok::less) || !getLang().ObjC1) 1082 continue; 1083 1084 SourceLocation LAngleLoc, EndProtoLoc; 1085 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1086 llvm::SmallVector<SourceLocation, 8> ProtocolLocs; 1087 ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false, 1088 LAngleLoc, EndProtoLoc); 1089 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(), 1090 ProtocolLocs.data(), LAngleLoc); 1091 1092 DS.SetRangeEnd(EndProtoLoc); 1093 1094 // Need to support trailing type qualifiers (e.g. "id<p> const"). 1095 // If a type specifier follows, it will be diagnosed elsewhere. 1096 continue; 1097 } 1098 1099 // type-name 1100 case tok::annot_template_id: { 1101 TemplateIdAnnotation *TemplateId 1102 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 1103 if (TemplateId->Kind != TNK_Type_template) { 1104 // This template-id does not refer to a type name, so we're 1105 // done with the type-specifiers. 1106 goto DoneWithDeclSpec; 1107 } 1108 1109 // If we're in a context where the template-id could be a 1110 // constructor name or specialization, check whether this is a 1111 // constructor declaration. 1112 if (getLang().CPlusPlus && DSContext == DSC_class && 1113 Actions.isCurrentClassName(*TemplateId->Name, CurScope) && 1114 isConstructorDeclarator()) 1115 goto DoneWithDeclSpec; 1116 1117 // Turn the template-id annotation token into a type annotation 1118 // token, then try again to parse it as a type-specifier. 1119 AnnotateTemplateIdTokenAsType(); 1120 continue; 1121 } 1122 1123 // GNU attributes support. 1124 case tok::kw___attribute: 1125 DS.AddAttributes(ParseGNUAttributes()); 1126 continue; 1127 1128 // Microsoft declspec support. 1129 case tok::kw___declspec: 1130 DS.AddAttributes(ParseMicrosoftDeclSpec()); 1131 continue; 1132 1133 // Microsoft single token adornments. 1134 case tok::kw___forceinline: 1135 // FIXME: Add handling here! 1136 break; 1137 1138 case tok::kw___ptr64: 1139 case tok::kw___w64: 1140 case tok::kw___cdecl: 1141 case tok::kw___stdcall: 1142 case tok::kw___fastcall: 1143 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 1144 continue; 1145 1146 // storage-class-specifier 1147 case tok::kw_typedef: 1148 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_typedef, Loc, PrevSpec, 1149 DiagID); 1150 break; 1151 case tok::kw_extern: 1152 if (DS.isThreadSpecified()) 1153 Diag(Tok, diag::ext_thread_before) << "extern"; 1154 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_extern, Loc, PrevSpec, 1155 DiagID); 1156 break; 1157 case tok::kw___private_extern__: 1158 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_private_extern, Loc, 1159 PrevSpec, DiagID); 1160 break; 1161 case tok::kw_static: 1162 if (DS.isThreadSpecified()) 1163 Diag(Tok, diag::ext_thread_before) << "static"; 1164 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_static, Loc, PrevSpec, 1165 DiagID); 1166 break; 1167 case tok::kw_auto: 1168 if (getLang().CPlusPlus0x) 1169 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, 1170 DiagID); 1171 else 1172 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_auto, Loc, PrevSpec, 1173 DiagID); 1174 break; 1175 case tok::kw_register: 1176 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_register, Loc, PrevSpec, 1177 DiagID); 1178 break; 1179 case tok::kw_mutable: 1180 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_mutable, Loc, PrevSpec, 1181 DiagID); 1182 break; 1183 case tok::kw___thread: 1184 isInvalid = DS.SetStorageClassSpecThread(Loc, PrevSpec, DiagID); 1185 break; 1186 1187 // function-specifier 1188 case tok::kw_inline: 1189 isInvalid = DS.SetFunctionSpecInline(Loc, PrevSpec, DiagID); 1190 break; 1191 case tok::kw_virtual: 1192 isInvalid = DS.SetFunctionSpecVirtual(Loc, PrevSpec, DiagID); 1193 break; 1194 case tok::kw_explicit: 1195 isInvalid = DS.SetFunctionSpecExplicit(Loc, PrevSpec, DiagID); 1196 break; 1197 1198 // friend 1199 case tok::kw_friend: 1200 if (DSContext == DSC_class) 1201 isInvalid = DS.SetFriendSpec(Loc, PrevSpec, DiagID); 1202 else { 1203 PrevSpec = ""; // not actually used by the diagnostic 1204 DiagID = diag::err_friend_invalid_in_context; 1205 isInvalid = true; 1206 } 1207 break; 1208 1209 // constexpr 1210 case tok::kw_constexpr: 1211 isInvalid = DS.SetConstexprSpec(Loc, PrevSpec, DiagID); 1212 break; 1213 1214 // type-specifier 1215 case tok::kw_short: 1216 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, 1217 DiagID); 1218 break; 1219 case tok::kw_long: 1220 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long) 1221 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, 1222 DiagID); 1223 else 1224 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 1225 DiagID); 1226 break; 1227 case tok::kw_signed: 1228 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, 1229 DiagID); 1230 break; 1231 case tok::kw_unsigned: 1232 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, 1233 DiagID); 1234 break; 1235 case tok::kw__Complex: 1236 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec, 1237 DiagID); 1238 break; 1239 case tok::kw__Imaginary: 1240 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec, 1241 DiagID); 1242 break; 1243 case tok::kw_void: 1244 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, 1245 DiagID); 1246 break; 1247 case tok::kw_char: 1248 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, 1249 DiagID); 1250 break; 1251 case tok::kw_int: 1252 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, 1253 DiagID); 1254 break; 1255 case tok::kw_float: 1256 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, 1257 DiagID); 1258 break; 1259 case tok::kw_double: 1260 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, 1261 DiagID); 1262 break; 1263 case tok::kw_wchar_t: 1264 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, 1265 DiagID); 1266 break; 1267 case tok::kw_char16_t: 1268 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, 1269 DiagID); 1270 break; 1271 case tok::kw_char32_t: 1272 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, 1273 DiagID); 1274 break; 1275 case tok::kw_bool: 1276 case tok::kw__Bool: 1277 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, 1278 DiagID); 1279 break; 1280 case tok::kw__Decimal32: 1281 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec, 1282 DiagID); 1283 break; 1284 case tok::kw__Decimal64: 1285 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec, 1286 DiagID); 1287 break; 1288 case tok::kw__Decimal128: 1289 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec, 1290 DiagID); 1291 break; 1292 case tok::kw___vector: 1293 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 1294 break; 1295 case tok::kw___pixel: 1296 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID); 1297 break; 1298 1299 // class-specifier: 1300 case tok::kw_class: 1301 case tok::kw_struct: 1302 case tok::kw_union: { 1303 tok::TokenKind Kind = Tok.getKind(); 1304 ConsumeToken(); 1305 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS); 1306 continue; 1307 } 1308 1309 // enum-specifier: 1310 case tok::kw_enum: 1311 ConsumeToken(); 1312 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS); 1313 continue; 1314 1315 // cv-qualifier: 1316 case tok::kw_const: 1317 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec, DiagID, 1318 getLang()); 1319 break; 1320 case tok::kw_volatile: 1321 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID, 1322 getLang()); 1323 break; 1324 case tok::kw_restrict: 1325 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID, 1326 getLang()); 1327 break; 1328 1329 // C++ typename-specifier: 1330 case tok::kw_typename: 1331 if (TryAnnotateTypeOrScopeToken()) { 1332 DS.SetTypeSpecError(); 1333 goto DoneWithDeclSpec; 1334 } 1335 if (!Tok.is(tok::kw_typename)) 1336 continue; 1337 break; 1338 1339 // GNU typeof support. 1340 case tok::kw_typeof: 1341 ParseTypeofSpecifier(DS); 1342 continue; 1343 1344 case tok::kw_decltype: 1345 ParseDecltypeSpecifier(DS); 1346 continue; 1347 1348 case tok::less: 1349 // GCC ObjC supports types like "<SomeProtocol>" as a synonym for 1350 // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous, 1351 // but we support it. 1352 if (DS.hasTypeSpecifier() || !getLang().ObjC1) 1353 goto DoneWithDeclSpec; 1354 1355 { 1356 SourceLocation LAngleLoc, EndProtoLoc; 1357 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1358 llvm::SmallVector<SourceLocation, 8> ProtocolLocs; 1359 ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false, 1360 LAngleLoc, EndProtoLoc); 1361 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(), 1362 ProtocolLocs.data(), LAngleLoc); 1363 DS.SetRangeEnd(EndProtoLoc); 1364 1365 Diag(Loc, diag::warn_objc_protocol_qualifier_missing_id) 1366 << FixItHint::CreateInsertion(Loc, "id") 1367 << SourceRange(Loc, EndProtoLoc); 1368 // Need to support trailing type qualifiers (e.g. "id<p> const"). 1369 // If a type specifier follows, it will be diagnosed elsewhere. 1370 continue; 1371 } 1372 } 1373 // If the specifier wasn't legal, issue a diagnostic. 1374 if (isInvalid) { 1375 assert(PrevSpec && "Method did not return previous specifier!"); 1376 assert(DiagID); 1377 Diag(Tok, DiagID) << PrevSpec; 1378 } 1379 DS.SetRangeEnd(Tok.getLocation()); 1380 ConsumeToken(); 1381 } 1382} 1383 1384/// ParseOptionalTypeSpecifier - Try to parse a single type-specifier. We 1385/// primarily follow the C++ grammar with additions for C99 and GNU, 1386/// which together subsume the C grammar. Note that the C++ 1387/// type-specifier also includes the C type-qualifier (for const, 1388/// volatile, and C99 restrict). Returns true if a type-specifier was 1389/// found (and parsed), false otherwise. 1390/// 1391/// type-specifier: [C++ 7.1.5] 1392/// simple-type-specifier 1393/// class-specifier 1394/// enum-specifier 1395/// elaborated-type-specifier [TODO] 1396/// cv-qualifier 1397/// 1398/// cv-qualifier: [C++ 7.1.5.1] 1399/// 'const' 1400/// 'volatile' 1401/// [C99] 'restrict' 1402/// 1403/// simple-type-specifier: [ C++ 7.1.5.2] 1404/// '::'[opt] nested-name-specifier[opt] type-name [TODO] 1405/// '::'[opt] nested-name-specifier 'template' template-id [TODO] 1406/// 'char' 1407/// 'wchar_t' 1408/// 'bool' 1409/// 'short' 1410/// 'int' 1411/// 'long' 1412/// 'signed' 1413/// 'unsigned' 1414/// 'float' 1415/// 'double' 1416/// 'void' 1417/// [C99] '_Bool' 1418/// [C99] '_Complex' 1419/// [C99] '_Imaginary' // Removed in TC2? 1420/// [GNU] '_Decimal32' 1421/// [GNU] '_Decimal64' 1422/// [GNU] '_Decimal128' 1423/// [GNU] typeof-specifier 1424/// [OBJC] class-name objc-protocol-refs[opt] [TODO] 1425/// [OBJC] typedef-name objc-protocol-refs[opt] [TODO] 1426/// [C++0x] 'decltype' ( expression ) 1427/// [AltiVec] '__vector' 1428bool Parser::ParseOptionalTypeSpecifier(DeclSpec &DS, bool& isInvalid, 1429 const char *&PrevSpec, 1430 unsigned &DiagID, 1431 const ParsedTemplateInfo &TemplateInfo, 1432 bool SuppressDeclarations) { 1433 SourceLocation Loc = Tok.getLocation(); 1434 1435 switch (Tok.getKind()) { 1436 case tok::identifier: // foo::bar 1437 // Check for need to substitute AltiVec keyword tokens. 1438 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid)) 1439 break; 1440 // Fall through. 1441 case tok::kw_typename: // typename foo::bar 1442 // Annotate typenames and C++ scope specifiers. If we get one, just 1443 // recurse to handle whatever we get. 1444 if (TryAnnotateTypeOrScopeToken()) 1445 return true; 1446 if (Tok.is(tok::identifier)) 1447 return false; 1448 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID, 1449 TemplateInfo, SuppressDeclarations); 1450 case tok::coloncolon: // ::foo::bar 1451 if (NextToken().is(tok::kw_new) || // ::new 1452 NextToken().is(tok::kw_delete)) // ::delete 1453 return false; 1454 1455 // Annotate typenames and C++ scope specifiers. If we get one, just 1456 // recurse to handle whatever we get. 1457 if (TryAnnotateTypeOrScopeToken()) 1458 return true; 1459 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID, 1460 TemplateInfo, SuppressDeclarations); 1461 1462 // simple-type-specifier: 1463 case tok::annot_typename: { 1464 if (Tok.getAnnotationValue()) 1465 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1466 DiagID, Tok.getAnnotationValue()); 1467 else 1468 DS.SetTypeSpecError(); 1469 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 1470 ConsumeToken(); // The typename 1471 1472 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1473 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1474 // Objective-C interface. If we don't have Objective-C or a '<', this is 1475 // just a normal reference to a typedef name. 1476 if (!Tok.is(tok::less) || !getLang().ObjC1) 1477 return true; 1478 1479 SourceLocation LAngleLoc, EndProtoLoc; 1480 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1481 llvm::SmallVector<SourceLocation, 8> ProtocolLocs; 1482 ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false, 1483 LAngleLoc, EndProtoLoc); 1484 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(), 1485 ProtocolLocs.data(), LAngleLoc); 1486 1487 DS.SetRangeEnd(EndProtoLoc); 1488 return true; 1489 } 1490 1491 case tok::kw_short: 1492 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, DiagID); 1493 break; 1494 case tok::kw_long: 1495 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long) 1496 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, 1497 DiagID); 1498 else 1499 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 1500 DiagID); 1501 break; 1502 case tok::kw_signed: 1503 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, DiagID); 1504 break; 1505 case tok::kw_unsigned: 1506 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, 1507 DiagID); 1508 break; 1509 case tok::kw__Complex: 1510 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec, 1511 DiagID); 1512 break; 1513 case tok::kw__Imaginary: 1514 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec, 1515 DiagID); 1516 break; 1517 case tok::kw_void: 1518 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, DiagID); 1519 break; 1520 case tok::kw_char: 1521 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, DiagID); 1522 break; 1523 case tok::kw_int: 1524 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, DiagID); 1525 break; 1526 case tok::kw_float: 1527 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, DiagID); 1528 break; 1529 case tok::kw_double: 1530 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, DiagID); 1531 break; 1532 case tok::kw_wchar_t: 1533 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, DiagID); 1534 break; 1535 case tok::kw_char16_t: 1536 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, DiagID); 1537 break; 1538 case tok::kw_char32_t: 1539 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, DiagID); 1540 break; 1541 case tok::kw_bool: 1542 case tok::kw__Bool: 1543 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, DiagID); 1544 break; 1545 case tok::kw__Decimal32: 1546 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec, 1547 DiagID); 1548 break; 1549 case tok::kw__Decimal64: 1550 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec, 1551 DiagID); 1552 break; 1553 case tok::kw__Decimal128: 1554 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec, 1555 DiagID); 1556 break; 1557 case tok::kw___vector: 1558 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 1559 break; 1560 case tok::kw___pixel: 1561 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID); 1562 break; 1563 1564 // class-specifier: 1565 case tok::kw_class: 1566 case tok::kw_struct: 1567 case tok::kw_union: { 1568 tok::TokenKind Kind = Tok.getKind(); 1569 ConsumeToken(); 1570 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS_none, 1571 SuppressDeclarations); 1572 return true; 1573 } 1574 1575 // enum-specifier: 1576 case tok::kw_enum: 1577 ConsumeToken(); 1578 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS_none); 1579 return true; 1580 1581 // cv-qualifier: 1582 case tok::kw_const: 1583 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, 1584 DiagID, getLang()); 1585 break; 1586 case tok::kw_volatile: 1587 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, 1588 DiagID, getLang()); 1589 break; 1590 case tok::kw_restrict: 1591 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, 1592 DiagID, getLang()); 1593 break; 1594 1595 // GNU typeof support. 1596 case tok::kw_typeof: 1597 ParseTypeofSpecifier(DS); 1598 return true; 1599 1600 // C++0x decltype support. 1601 case tok::kw_decltype: 1602 ParseDecltypeSpecifier(DS); 1603 return true; 1604 1605 // C++0x auto support. 1606 case tok::kw_auto: 1607 if (!getLang().CPlusPlus0x) 1608 return false; 1609 1610 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, DiagID); 1611 break; 1612 case tok::kw___ptr64: 1613 case tok::kw___w64: 1614 case tok::kw___cdecl: 1615 case tok::kw___stdcall: 1616 case tok::kw___fastcall: 1617 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 1618 return true; 1619 1620 default: 1621 // Not a type-specifier; do nothing. 1622 return false; 1623 } 1624 1625 // If the specifier combination wasn't legal, issue a diagnostic. 1626 if (isInvalid) { 1627 assert(PrevSpec && "Method did not return previous specifier!"); 1628 // Pick between error or extwarn. 1629 Diag(Tok, DiagID) << PrevSpec; 1630 } 1631 DS.SetRangeEnd(Tok.getLocation()); 1632 ConsumeToken(); // whatever we parsed above. 1633 return true; 1634} 1635 1636/// ParseStructDeclaration - Parse a struct declaration without the terminating 1637/// semicolon. 1638/// 1639/// struct-declaration: 1640/// specifier-qualifier-list struct-declarator-list 1641/// [GNU] __extension__ struct-declaration 1642/// [GNU] specifier-qualifier-list 1643/// struct-declarator-list: 1644/// struct-declarator 1645/// struct-declarator-list ',' struct-declarator 1646/// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator 1647/// struct-declarator: 1648/// declarator 1649/// [GNU] declarator attributes[opt] 1650/// declarator[opt] ':' constant-expression 1651/// [GNU] declarator[opt] ':' constant-expression attributes[opt] 1652/// 1653void Parser:: 1654ParseStructDeclaration(DeclSpec &DS, FieldCallback &Fields) { 1655 if (Tok.is(tok::kw___extension__)) { 1656 // __extension__ silences extension warnings in the subexpression. 1657 ExtensionRAIIObject O(Diags); // Use RAII to do this. 1658 ConsumeToken(); 1659 return ParseStructDeclaration(DS, Fields); 1660 } 1661 1662 // Parse the common specifier-qualifiers-list piece. 1663 SourceLocation DSStart = Tok.getLocation(); 1664 ParseSpecifierQualifierList(DS); 1665 1666 // If there are no declarators, this is a free-standing declaration 1667 // specifier. Let the actions module cope with it. 1668 if (Tok.is(tok::semi)) { 1669 Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 1670 return; 1671 } 1672 1673 // Read struct-declarators until we find the semicolon. 1674 bool FirstDeclarator = true; 1675 while (1) { 1676 ParsingDeclRAIIObject PD(*this); 1677 FieldDeclarator DeclaratorInfo(DS); 1678 1679 // Attributes are only allowed here on successive declarators. 1680 if (!FirstDeclarator && Tok.is(tok::kw___attribute)) { 1681 SourceLocation Loc; 1682 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1683 DeclaratorInfo.D.AddAttributes(AttrList, Loc); 1684 } 1685 1686 /// struct-declarator: declarator 1687 /// struct-declarator: declarator[opt] ':' constant-expression 1688 if (Tok.isNot(tok::colon)) { 1689 // Don't parse FOO:BAR as if it were a typo for FOO::BAR. 1690 ColonProtectionRAIIObject X(*this); 1691 ParseDeclarator(DeclaratorInfo.D); 1692 } 1693 1694 if (Tok.is(tok::colon)) { 1695 ConsumeToken(); 1696 OwningExprResult Res(ParseConstantExpression()); 1697 if (Res.isInvalid()) 1698 SkipUntil(tok::semi, true, true); 1699 else 1700 DeclaratorInfo.BitfieldSize = Res.release(); 1701 } 1702 1703 // If attributes exist after the declarator, parse them. 1704 if (Tok.is(tok::kw___attribute)) { 1705 SourceLocation Loc; 1706 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1707 DeclaratorInfo.D.AddAttributes(AttrList, Loc); 1708 } 1709 1710 // We're done with this declarator; invoke the callback. 1711 DeclPtrTy D = Fields.invoke(DeclaratorInfo); 1712 PD.complete(D); 1713 1714 // If we don't have a comma, it is either the end of the list (a ';') 1715 // or an error, bail out. 1716 if (Tok.isNot(tok::comma)) 1717 return; 1718 1719 // Consume the comma. 1720 ConsumeToken(); 1721 1722 FirstDeclarator = false; 1723 } 1724} 1725 1726/// ParseStructUnionBody 1727/// struct-contents: 1728/// struct-declaration-list 1729/// [EXT] empty 1730/// [GNU] "struct-declaration-list" without terminatoring ';' 1731/// struct-declaration-list: 1732/// struct-declaration 1733/// struct-declaration-list struct-declaration 1734/// [OBC] '@' 'defs' '(' class-name ')' 1735/// 1736void Parser::ParseStructUnionBody(SourceLocation RecordLoc, 1737 unsigned TagType, DeclPtrTy TagDecl) { 1738 PrettyStackTraceActionsDecl CrashInfo(TagDecl, RecordLoc, Actions, 1739 PP.getSourceManager(), 1740 "parsing struct/union body"); 1741 1742 SourceLocation LBraceLoc = ConsumeBrace(); 1743 1744 ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope); 1745 Actions.ActOnTagStartDefinition(CurScope, TagDecl); 1746 1747 // Empty structs are an extension in C (C99 6.7.2.1p7), but are allowed in 1748 // C++. 1749 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus) 1750 Diag(Tok, diag::ext_empty_struct_union_enum) 1751 << DeclSpec::getSpecifierName((DeclSpec::TST)TagType); 1752 1753 llvm::SmallVector<DeclPtrTy, 32> FieldDecls; 1754 1755 // While we still have something to read, read the declarations in the struct. 1756 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 1757 // Each iteration of this loop reads one struct-declaration. 1758 1759 // Check for extraneous top-level semicolon. 1760 if (Tok.is(tok::semi)) { 1761 Diag(Tok, diag::ext_extra_struct_semi) 1762 << FixItHint::CreateRemoval(Tok.getLocation()); 1763 ConsumeToken(); 1764 continue; 1765 } 1766 1767 // Parse all the comma separated declarators. 1768 DeclSpec DS; 1769 1770 if (!Tok.is(tok::at)) { 1771 struct CFieldCallback : FieldCallback { 1772 Parser &P; 1773 DeclPtrTy TagDecl; 1774 llvm::SmallVectorImpl<DeclPtrTy> &FieldDecls; 1775 1776 CFieldCallback(Parser &P, DeclPtrTy TagDecl, 1777 llvm::SmallVectorImpl<DeclPtrTy> &FieldDecls) : 1778 P(P), TagDecl(TagDecl), FieldDecls(FieldDecls) {} 1779 1780 virtual DeclPtrTy invoke(FieldDeclarator &FD) { 1781 // Install the declarator into the current TagDecl. 1782 DeclPtrTy Field = P.Actions.ActOnField(P.CurScope, TagDecl, 1783 FD.D.getDeclSpec().getSourceRange().getBegin(), 1784 FD.D, FD.BitfieldSize); 1785 FieldDecls.push_back(Field); 1786 return Field; 1787 } 1788 } Callback(*this, TagDecl, FieldDecls); 1789 1790 ParseStructDeclaration(DS, Callback); 1791 } else { // Handle @defs 1792 ConsumeToken(); 1793 if (!Tok.isObjCAtKeyword(tok::objc_defs)) { 1794 Diag(Tok, diag::err_unexpected_at); 1795 SkipUntil(tok::semi, true); 1796 continue; 1797 } 1798 ConsumeToken(); 1799 ExpectAndConsume(tok::l_paren, diag::err_expected_lparen); 1800 if (!Tok.is(tok::identifier)) { 1801 Diag(Tok, diag::err_expected_ident); 1802 SkipUntil(tok::semi, true); 1803 continue; 1804 } 1805 llvm::SmallVector<DeclPtrTy, 16> Fields; 1806 Actions.ActOnDefs(CurScope, TagDecl, Tok.getLocation(), 1807 Tok.getIdentifierInfo(), Fields); 1808 FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end()); 1809 ConsumeToken(); 1810 ExpectAndConsume(tok::r_paren, diag::err_expected_rparen); 1811 } 1812 1813 if (Tok.is(tok::semi)) { 1814 ConsumeToken(); 1815 } else if (Tok.is(tok::r_brace)) { 1816 ExpectAndConsume(tok::semi, diag::ext_expected_semi_decl_list); 1817 break; 1818 } else { 1819 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list); 1820 // Skip to end of block or statement to avoid ext-warning on extra ';'. 1821 SkipUntil(tok::r_brace, true, true); 1822 // If we stopped at a ';', eat it. 1823 if (Tok.is(tok::semi)) ConsumeToken(); 1824 } 1825 } 1826 1827 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 1828 1829 llvm::OwningPtr<AttributeList> AttrList; 1830 // If attributes exist after struct contents, parse them. 1831 if (Tok.is(tok::kw___attribute)) 1832 AttrList.reset(ParseGNUAttributes()); 1833 1834 Actions.ActOnFields(CurScope, 1835 RecordLoc, TagDecl, FieldDecls.data(), FieldDecls.size(), 1836 LBraceLoc, RBraceLoc, 1837 AttrList.get()); 1838 StructScope.Exit(); 1839 Actions.ActOnTagFinishDefinition(CurScope, TagDecl, RBraceLoc); 1840} 1841 1842 1843/// ParseEnumSpecifier 1844/// enum-specifier: [C99 6.7.2.2] 1845/// 'enum' identifier[opt] '{' enumerator-list '}' 1846///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}' 1847/// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt] 1848/// '}' attributes[opt] 1849/// 'enum' identifier 1850/// [GNU] 'enum' attributes[opt] identifier 1851/// 1852/// [C++] elaborated-type-specifier: 1853/// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier 1854/// 1855void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS, 1856 const ParsedTemplateInfo &TemplateInfo, 1857 AccessSpecifier AS) { 1858 // Parse the tag portion of this. 1859 if (Tok.is(tok::code_completion)) { 1860 // Code completion for an enum name. 1861 Actions.CodeCompleteTag(CurScope, DeclSpec::TST_enum); 1862 ConsumeToken(); 1863 } 1864 1865 llvm::OwningPtr<AttributeList> Attr; 1866 // If attributes exist after tag, parse them. 1867 if (Tok.is(tok::kw___attribute)) 1868 Attr.reset(ParseGNUAttributes()); 1869 1870 CXXScopeSpec SS; 1871 if (getLang().CPlusPlus) { 1872 if (ParseOptionalCXXScopeSpecifier(SS, 0, false)) 1873 return; 1874 1875 if (SS.isSet() && Tok.isNot(tok::identifier)) { 1876 Diag(Tok, diag::err_expected_ident); 1877 if (Tok.isNot(tok::l_brace)) { 1878 // Has no name and is not a definition. 1879 // Skip the rest of this declarator, up until the comma or semicolon. 1880 SkipUntil(tok::comma, true); 1881 return; 1882 } 1883 } 1884 } 1885 1886 // Must have either 'enum name' or 'enum {...}'. 1887 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace)) { 1888 Diag(Tok, diag::err_expected_ident_lbrace); 1889 1890 // Skip the rest of this declarator, up until the comma or semicolon. 1891 SkipUntil(tok::comma, true); 1892 return; 1893 } 1894 1895 // enums cannot be templates. 1896 if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) { 1897 Diag(Tok, diag::err_enum_template); 1898 1899 // Skip the rest of this declarator, up until the comma or semicolon. 1900 SkipUntil(tok::comma, true); 1901 return; 1902 } 1903 1904 // If an identifier is present, consume and remember it. 1905 IdentifierInfo *Name = 0; 1906 SourceLocation NameLoc; 1907 if (Tok.is(tok::identifier)) { 1908 Name = Tok.getIdentifierInfo(); 1909 NameLoc = ConsumeToken(); 1910 } 1911 1912 // There are three options here. If we have 'enum foo;', then this is a 1913 // forward declaration. If we have 'enum foo {...' then this is a 1914 // definition. Otherwise we have something like 'enum foo xyz', a reference. 1915 // 1916 // This is needed to handle stuff like this right (C99 6.7.2.3p11): 1917 // enum foo {..}; void bar() { enum foo; } <- new foo in bar. 1918 // enum foo {..}; void bar() { enum foo x; } <- use of old foo. 1919 // 1920 Action::TagUseKind TUK; 1921 if (Tok.is(tok::l_brace)) 1922 TUK = Action::TUK_Definition; 1923 else if (Tok.is(tok::semi)) 1924 TUK = Action::TUK_Declaration; 1925 else 1926 TUK = Action::TUK_Reference; 1927 bool Owned = false; 1928 bool IsDependent = false; 1929 DeclPtrTy TagDecl = Actions.ActOnTag(CurScope, DeclSpec::TST_enum, TUK, 1930 StartLoc, SS, Name, NameLoc, Attr.get(), 1931 AS, 1932 Action::MultiTemplateParamsArg(Actions), 1933 Owned, IsDependent); 1934 assert(!IsDependent && "didn't expect dependent enum"); 1935 1936 if (Tok.is(tok::l_brace)) 1937 ParseEnumBody(StartLoc, TagDecl); 1938 1939 // FIXME: The DeclSpec should keep the locations of both the keyword and the 1940 // name (if there is one). 1941 SourceLocation TSTLoc = NameLoc.isValid()? NameLoc : StartLoc; 1942 const char *PrevSpec = 0; 1943 unsigned DiagID; 1944 if (DS.SetTypeSpecType(DeclSpec::TST_enum, TSTLoc, PrevSpec, DiagID, 1945 TagDecl.getAs<void>(), Owned)) 1946 Diag(StartLoc, DiagID) << PrevSpec; 1947} 1948 1949/// ParseEnumBody - Parse a {} enclosed enumerator-list. 1950/// enumerator-list: 1951/// enumerator 1952/// enumerator-list ',' enumerator 1953/// enumerator: 1954/// enumeration-constant 1955/// enumeration-constant '=' constant-expression 1956/// enumeration-constant: 1957/// identifier 1958/// 1959void Parser::ParseEnumBody(SourceLocation StartLoc, DeclPtrTy EnumDecl) { 1960 // Enter the scope of the enum body and start the definition. 1961 ParseScope EnumScope(this, Scope::DeclScope); 1962 Actions.ActOnTagStartDefinition(CurScope, EnumDecl); 1963 1964 SourceLocation LBraceLoc = ConsumeBrace(); 1965 1966 // C does not allow an empty enumerator-list, C++ does [dcl.enum]. 1967 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus) 1968 Diag(Tok, diag::ext_empty_struct_union_enum) << "enum"; 1969 1970 llvm::SmallVector<DeclPtrTy, 32> EnumConstantDecls; 1971 1972 DeclPtrTy LastEnumConstDecl; 1973 1974 // Parse the enumerator-list. 1975 while (Tok.is(tok::identifier)) { 1976 IdentifierInfo *Ident = Tok.getIdentifierInfo(); 1977 SourceLocation IdentLoc = ConsumeToken(); 1978 1979 SourceLocation EqualLoc; 1980 OwningExprResult AssignedVal(Actions); 1981 if (Tok.is(tok::equal)) { 1982 EqualLoc = ConsumeToken(); 1983 AssignedVal = ParseConstantExpression(); 1984 if (AssignedVal.isInvalid()) 1985 SkipUntil(tok::comma, tok::r_brace, true, true); 1986 } 1987 1988 // Install the enumerator constant into EnumDecl. 1989 DeclPtrTy EnumConstDecl = Actions.ActOnEnumConstant(CurScope, EnumDecl, 1990 LastEnumConstDecl, 1991 IdentLoc, Ident, 1992 EqualLoc, 1993 AssignedVal.release()); 1994 EnumConstantDecls.push_back(EnumConstDecl); 1995 LastEnumConstDecl = EnumConstDecl; 1996 1997 if (Tok.isNot(tok::comma)) 1998 break; 1999 SourceLocation CommaLoc = ConsumeToken(); 2000 2001 if (Tok.isNot(tok::identifier) && 2002 !(getLang().C99 || getLang().CPlusPlus0x)) 2003 Diag(CommaLoc, diag::ext_enumerator_list_comma) 2004 << getLang().CPlusPlus 2005 << FixItHint::CreateRemoval(CommaLoc); 2006 } 2007 2008 // Eat the }. 2009 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 2010 2011 llvm::OwningPtr<AttributeList> Attr; 2012 // If attributes exist after the identifier list, parse them. 2013 if (Tok.is(tok::kw___attribute)) 2014 Attr.reset(ParseGNUAttributes()); // FIXME: where do they do? 2015 2016 Actions.ActOnEnumBody(StartLoc, LBraceLoc, RBraceLoc, EnumDecl, 2017 EnumConstantDecls.data(), EnumConstantDecls.size(), 2018 CurScope, Attr.get()); 2019 2020 EnumScope.Exit(); 2021 Actions.ActOnTagFinishDefinition(CurScope, EnumDecl, RBraceLoc); 2022} 2023 2024/// isTypeSpecifierQualifier - Return true if the current token could be the 2025/// start of a type-qualifier-list. 2026bool Parser::isTypeQualifier() const { 2027 switch (Tok.getKind()) { 2028 default: return false; 2029 // type-qualifier 2030 case tok::kw_const: 2031 case tok::kw_volatile: 2032 case tok::kw_restrict: 2033 return true; 2034 } 2035} 2036 2037/// isKnownToBeTypeSpecifier - Return true if we know that the specified token 2038/// is definitely a type-specifier. Return false if it isn't part of a type 2039/// specifier or if we're not sure. 2040bool Parser::isKnownToBeTypeSpecifier(const Token &Tok) const { 2041 switch (Tok.getKind()) { 2042 default: return false; 2043 // type-specifiers 2044 case tok::kw_short: 2045 case tok::kw_long: 2046 case tok::kw_signed: 2047 case tok::kw_unsigned: 2048 case tok::kw__Complex: 2049 case tok::kw__Imaginary: 2050 case tok::kw_void: 2051 case tok::kw_char: 2052 case tok::kw_wchar_t: 2053 case tok::kw_char16_t: 2054 case tok::kw_char32_t: 2055 case tok::kw_int: 2056 case tok::kw_float: 2057 case tok::kw_double: 2058 case tok::kw_bool: 2059 case tok::kw__Bool: 2060 case tok::kw__Decimal32: 2061 case tok::kw__Decimal64: 2062 case tok::kw__Decimal128: 2063 case tok::kw___vector: 2064 2065 // struct-or-union-specifier (C99) or class-specifier (C++) 2066 case tok::kw_class: 2067 case tok::kw_struct: 2068 case tok::kw_union: 2069 // enum-specifier 2070 case tok::kw_enum: 2071 2072 // typedef-name 2073 case tok::annot_typename: 2074 return true; 2075 } 2076} 2077 2078/// isTypeSpecifierQualifier - Return true if the current token could be the 2079/// start of a specifier-qualifier-list. 2080bool Parser::isTypeSpecifierQualifier() { 2081 switch (Tok.getKind()) { 2082 default: return false; 2083 2084 case tok::identifier: // foo::bar 2085 if (TryAltiVecVectorToken()) 2086 return true; 2087 // Fall through. 2088 case tok::kw_typename: // typename T::type 2089 // Annotate typenames and C++ scope specifiers. If we get one, just 2090 // recurse to handle whatever we get. 2091 if (TryAnnotateTypeOrScopeToken()) 2092 return true; 2093 if (Tok.is(tok::identifier)) 2094 return false; 2095 return isTypeSpecifierQualifier(); 2096 2097 case tok::coloncolon: // ::foo::bar 2098 if (NextToken().is(tok::kw_new) || // ::new 2099 NextToken().is(tok::kw_delete)) // ::delete 2100 return false; 2101 2102 if (TryAnnotateTypeOrScopeToken()) 2103 return true; 2104 return isTypeSpecifierQualifier(); 2105 2106 // GNU attributes support. 2107 case tok::kw___attribute: 2108 // GNU typeof support. 2109 case tok::kw_typeof: 2110 2111 // type-specifiers 2112 case tok::kw_short: 2113 case tok::kw_long: 2114 case tok::kw_signed: 2115 case tok::kw_unsigned: 2116 case tok::kw__Complex: 2117 case tok::kw__Imaginary: 2118 case tok::kw_void: 2119 case tok::kw_char: 2120 case tok::kw_wchar_t: 2121 case tok::kw_char16_t: 2122 case tok::kw_char32_t: 2123 case tok::kw_int: 2124 case tok::kw_float: 2125 case tok::kw_double: 2126 case tok::kw_bool: 2127 case tok::kw__Bool: 2128 case tok::kw__Decimal32: 2129 case tok::kw__Decimal64: 2130 case tok::kw__Decimal128: 2131 case tok::kw___vector: 2132 2133 // struct-or-union-specifier (C99) or class-specifier (C++) 2134 case tok::kw_class: 2135 case tok::kw_struct: 2136 case tok::kw_union: 2137 // enum-specifier 2138 case tok::kw_enum: 2139 2140 // type-qualifier 2141 case tok::kw_const: 2142 case tok::kw_volatile: 2143 case tok::kw_restrict: 2144 2145 // typedef-name 2146 case tok::annot_typename: 2147 return true; 2148 2149 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'. 2150 case tok::less: 2151 return getLang().ObjC1; 2152 2153 case tok::kw___cdecl: 2154 case tok::kw___stdcall: 2155 case tok::kw___fastcall: 2156 case tok::kw___w64: 2157 case tok::kw___ptr64: 2158 return true; 2159 } 2160} 2161 2162/// isDeclarationSpecifier() - Return true if the current token is part of a 2163/// declaration specifier. 2164bool Parser::isDeclarationSpecifier() { 2165 switch (Tok.getKind()) { 2166 default: return false; 2167 2168 case tok::identifier: // foo::bar 2169 // Unfortunate hack to support "Class.factoryMethod" notation. 2170 if (getLang().ObjC1 && NextToken().is(tok::period)) 2171 return false; 2172 if (TryAltiVecVectorToken()) 2173 return true; 2174 // Fall through. 2175 case tok::kw_typename: // typename T::type 2176 // Annotate typenames and C++ scope specifiers. If we get one, just 2177 // recurse to handle whatever we get. 2178 if (TryAnnotateTypeOrScopeToken()) 2179 return true; 2180 if (Tok.is(tok::identifier)) 2181 return false; 2182 return isDeclarationSpecifier(); 2183 2184 case tok::coloncolon: // ::foo::bar 2185 if (NextToken().is(tok::kw_new) || // ::new 2186 NextToken().is(tok::kw_delete)) // ::delete 2187 return false; 2188 2189 // Annotate typenames and C++ scope specifiers. If we get one, just 2190 // recurse to handle whatever we get. 2191 if (TryAnnotateTypeOrScopeToken()) 2192 return true; 2193 return isDeclarationSpecifier(); 2194 2195 // storage-class-specifier 2196 case tok::kw_typedef: 2197 case tok::kw_extern: 2198 case tok::kw___private_extern__: 2199 case tok::kw_static: 2200 case tok::kw_auto: 2201 case tok::kw_register: 2202 case tok::kw___thread: 2203 2204 // type-specifiers 2205 case tok::kw_short: 2206 case tok::kw_long: 2207 case tok::kw_signed: 2208 case tok::kw_unsigned: 2209 case tok::kw__Complex: 2210 case tok::kw__Imaginary: 2211 case tok::kw_void: 2212 case tok::kw_char: 2213 case tok::kw_wchar_t: 2214 case tok::kw_char16_t: 2215 case tok::kw_char32_t: 2216 2217 case tok::kw_int: 2218 case tok::kw_float: 2219 case tok::kw_double: 2220 case tok::kw_bool: 2221 case tok::kw__Bool: 2222 case tok::kw__Decimal32: 2223 case tok::kw__Decimal64: 2224 case tok::kw__Decimal128: 2225 case tok::kw___vector: 2226 2227 // struct-or-union-specifier (C99) or class-specifier (C++) 2228 case tok::kw_class: 2229 case tok::kw_struct: 2230 case tok::kw_union: 2231 // enum-specifier 2232 case tok::kw_enum: 2233 2234 // type-qualifier 2235 case tok::kw_const: 2236 case tok::kw_volatile: 2237 case tok::kw_restrict: 2238 2239 // function-specifier 2240 case tok::kw_inline: 2241 case tok::kw_virtual: 2242 case tok::kw_explicit: 2243 2244 // typedef-name 2245 case tok::annot_typename: 2246 2247 // GNU typeof support. 2248 case tok::kw_typeof: 2249 2250 // GNU attributes. 2251 case tok::kw___attribute: 2252 return true; 2253 2254 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'. 2255 case tok::less: 2256 return getLang().ObjC1; 2257 2258 case tok::kw___declspec: 2259 case tok::kw___cdecl: 2260 case tok::kw___stdcall: 2261 case tok::kw___fastcall: 2262 case tok::kw___w64: 2263 case tok::kw___ptr64: 2264 case tok::kw___forceinline: 2265 return true; 2266 } 2267} 2268 2269bool Parser::isConstructorDeclarator() { 2270 TentativeParsingAction TPA(*this); 2271 2272 // Parse the C++ scope specifier. 2273 CXXScopeSpec SS; 2274 if (ParseOptionalCXXScopeSpecifier(SS, 0, true)) { 2275 TPA.Revert(); 2276 return false; 2277 } 2278 2279 // Parse the constructor name. 2280 if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id)) { 2281 // We already know that we have a constructor name; just consume 2282 // the token. 2283 ConsumeToken(); 2284 } else { 2285 TPA.Revert(); 2286 return false; 2287 } 2288 2289 // Current class name must be followed by a left parentheses. 2290 if (Tok.isNot(tok::l_paren)) { 2291 TPA.Revert(); 2292 return false; 2293 } 2294 ConsumeParen(); 2295 2296 // A right parentheses or ellipsis signals that we have a constructor. 2297 if (Tok.is(tok::r_paren) || Tok.is(tok::ellipsis)) { 2298 TPA.Revert(); 2299 return true; 2300 } 2301 2302 // If we need to, enter the specified scope. 2303 DeclaratorScopeObj DeclScopeObj(*this, SS); 2304 if (SS.isSet() && Actions.ShouldEnterDeclaratorScope(CurScope, SS)) 2305 DeclScopeObj.EnterDeclaratorScope(); 2306 2307 // Check whether the next token(s) are part of a declaration 2308 // specifier, in which case we have the start of a parameter and, 2309 // therefore, we know that this is a constructor. 2310 bool IsConstructor = isDeclarationSpecifier(); 2311 TPA.Revert(); 2312 return IsConstructor; 2313} 2314 2315/// ParseTypeQualifierListOpt 2316/// type-qualifier-list: [C99 6.7.5] 2317/// type-qualifier 2318/// [GNU] attributes [ only if AttributesAllowed=true ] 2319/// type-qualifier-list type-qualifier 2320/// [GNU] type-qualifier-list attributes [ only if AttributesAllowed=true ] 2321/// [C++0x] attribute-specifier[opt] is allowed before cv-qualifier-seq 2322/// if CXX0XAttributesAllowed = true 2323/// 2324void Parser::ParseTypeQualifierListOpt(DeclSpec &DS, bool GNUAttributesAllowed, 2325 bool CXX0XAttributesAllowed) { 2326 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 2327 SourceLocation Loc = Tok.getLocation(); 2328 CXX0XAttributeList Attr = ParseCXX0XAttributes(); 2329 if (CXX0XAttributesAllowed) 2330 DS.AddAttributes(Attr.AttrList); 2331 else 2332 Diag(Loc, diag::err_attributes_not_allowed); 2333 } 2334 2335 while (1) { 2336 bool isInvalid = false; 2337 const char *PrevSpec = 0; 2338 unsigned DiagID = 0; 2339 SourceLocation Loc = Tok.getLocation(); 2340 2341 switch (Tok.getKind()) { 2342 case tok::kw_const: 2343 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, DiagID, 2344 getLang()); 2345 break; 2346 case tok::kw_volatile: 2347 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID, 2348 getLang()); 2349 break; 2350 case tok::kw_restrict: 2351 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID, 2352 getLang()); 2353 break; 2354 case tok::kw___w64: 2355 case tok::kw___ptr64: 2356 case tok::kw___cdecl: 2357 case tok::kw___stdcall: 2358 case tok::kw___fastcall: 2359 if (GNUAttributesAllowed) { 2360 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 2361 continue; 2362 } 2363 goto DoneWithTypeQuals; 2364 case tok::kw___attribute: 2365 if (GNUAttributesAllowed) { 2366 DS.AddAttributes(ParseGNUAttributes()); 2367 continue; // do *not* consume the next token! 2368 } 2369 // otherwise, FALL THROUGH! 2370 default: 2371 DoneWithTypeQuals: 2372 // If this is not a type-qualifier token, we're done reading type 2373 // qualifiers. First verify that DeclSpec's are consistent. 2374 DS.Finish(Diags, PP); 2375 return; 2376 } 2377 2378 // If the specifier combination wasn't legal, issue a diagnostic. 2379 if (isInvalid) { 2380 assert(PrevSpec && "Method did not return previous specifier!"); 2381 Diag(Tok, DiagID) << PrevSpec; 2382 } 2383 ConsumeToken(); 2384 } 2385} 2386 2387 2388/// ParseDeclarator - Parse and verify a newly-initialized declarator. 2389/// 2390void Parser::ParseDeclarator(Declarator &D) { 2391 /// This implements the 'declarator' production in the C grammar, then checks 2392 /// for well-formedness and issues diagnostics. 2393 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator); 2394} 2395 2396/// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator 2397/// is parsed by the function passed to it. Pass null, and the direct-declarator 2398/// isn't parsed at all, making this function effectively parse the C++ 2399/// ptr-operator production. 2400/// 2401/// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl] 2402/// [C] pointer[opt] direct-declarator 2403/// [C++] direct-declarator 2404/// [C++] ptr-operator declarator 2405/// 2406/// pointer: [C99 6.7.5] 2407/// '*' type-qualifier-list[opt] 2408/// '*' type-qualifier-list[opt] pointer 2409/// 2410/// ptr-operator: 2411/// '*' cv-qualifier-seq[opt] 2412/// '&' 2413/// [C++0x] '&&' 2414/// [GNU] '&' restrict[opt] attributes[opt] 2415/// [GNU?] '&&' restrict[opt] attributes[opt] 2416/// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt] 2417void Parser::ParseDeclaratorInternal(Declarator &D, 2418 DirectDeclParseFunction DirectDeclParser) { 2419 if (Diags.hasAllExtensionsSilenced()) 2420 D.setExtension(); 2421 // C++ member pointers start with a '::' or a nested-name. 2422 // Member pointers get special handling, since there's no place for the 2423 // scope spec in the generic path below. 2424 if (getLang().CPlusPlus && 2425 (Tok.is(tok::coloncolon) || Tok.is(tok::identifier) || 2426 Tok.is(tok::annot_cxxscope))) { 2427 CXXScopeSpec SS; 2428 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, true); // ignore fail 2429 2430 if (SS.isNotEmpty()) { 2431 if (Tok.isNot(tok::star)) { 2432 // The scope spec really belongs to the direct-declarator. 2433 D.getCXXScopeSpec() = SS; 2434 if (DirectDeclParser) 2435 (this->*DirectDeclParser)(D); 2436 return; 2437 } 2438 2439 SourceLocation Loc = ConsumeToken(); 2440 D.SetRangeEnd(Loc); 2441 DeclSpec DS; 2442 ParseTypeQualifierListOpt(DS); 2443 D.ExtendWithDeclSpec(DS); 2444 2445 // Recurse to parse whatever is left. 2446 ParseDeclaratorInternal(D, DirectDeclParser); 2447 2448 // Sema will have to catch (syntactically invalid) pointers into global 2449 // scope. It has to catch pointers into namespace scope anyway. 2450 D.AddTypeInfo(DeclaratorChunk::getMemberPointer(SS,DS.getTypeQualifiers(), 2451 Loc, DS.TakeAttributes()), 2452 /* Don't replace range end. */SourceLocation()); 2453 return; 2454 } 2455 } 2456 2457 tok::TokenKind Kind = Tok.getKind(); 2458 // Not a pointer, C++ reference, or block. 2459 if (Kind != tok::star && Kind != tok::caret && 2460 (Kind != tok::amp || !getLang().CPlusPlus) && 2461 // We parse rvalue refs in C++03, because otherwise the errors are scary. 2462 (Kind != tok::ampamp || !getLang().CPlusPlus)) { 2463 if (DirectDeclParser) 2464 (this->*DirectDeclParser)(D); 2465 return; 2466 } 2467 2468 // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference, 2469 // '&&' -> rvalue reference 2470 SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&. 2471 D.SetRangeEnd(Loc); 2472 2473 if (Kind == tok::star || Kind == tok::caret) { 2474 // Is a pointer. 2475 DeclSpec DS; 2476 2477 ParseTypeQualifierListOpt(DS); 2478 D.ExtendWithDeclSpec(DS); 2479 2480 // Recursively parse the declarator. 2481 ParseDeclaratorInternal(D, DirectDeclParser); 2482 if (Kind == tok::star) 2483 // Remember that we parsed a pointer type, and remember the type-quals. 2484 D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc, 2485 DS.TakeAttributes()), 2486 SourceLocation()); 2487 else 2488 // Remember that we parsed a Block type, and remember the type-quals. 2489 D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(), 2490 Loc, DS.TakeAttributes()), 2491 SourceLocation()); 2492 } else { 2493 // Is a reference 2494 DeclSpec DS; 2495 2496 // Complain about rvalue references in C++03, but then go on and build 2497 // the declarator. 2498 if (Kind == tok::ampamp && !getLang().CPlusPlus0x) 2499 Diag(Loc, diag::err_rvalue_reference); 2500 2501 // C++ 8.3.2p1: cv-qualified references are ill-formed except when the 2502 // cv-qualifiers are introduced through the use of a typedef or of a 2503 // template type argument, in which case the cv-qualifiers are ignored. 2504 // 2505 // [GNU] Retricted references are allowed. 2506 // [GNU] Attributes on references are allowed. 2507 // [C++0x] Attributes on references are not allowed. 2508 ParseTypeQualifierListOpt(DS, true, false); 2509 D.ExtendWithDeclSpec(DS); 2510 2511 if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) { 2512 if (DS.getTypeQualifiers() & DeclSpec::TQ_const) 2513 Diag(DS.getConstSpecLoc(), 2514 diag::err_invalid_reference_qualifier_application) << "const"; 2515 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) 2516 Diag(DS.getVolatileSpecLoc(), 2517 diag::err_invalid_reference_qualifier_application) << "volatile"; 2518 } 2519 2520 // Recursively parse the declarator. 2521 ParseDeclaratorInternal(D, DirectDeclParser); 2522 2523 if (D.getNumTypeObjects() > 0) { 2524 // C++ [dcl.ref]p4: There shall be no references to references. 2525 DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1); 2526 if (InnerChunk.Kind == DeclaratorChunk::Reference) { 2527 if (const IdentifierInfo *II = D.getIdentifier()) 2528 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference) 2529 << II; 2530 else 2531 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference) 2532 << "type name"; 2533 2534 // Once we've complained about the reference-to-reference, we 2535 // can go ahead and build the (technically ill-formed) 2536 // declarator: reference collapsing will take care of it. 2537 } 2538 } 2539 2540 // Remember that we parsed a reference type. It doesn't have type-quals. 2541 D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc, 2542 DS.TakeAttributes(), 2543 Kind == tok::amp), 2544 SourceLocation()); 2545 } 2546} 2547 2548/// ParseDirectDeclarator 2549/// direct-declarator: [C99 6.7.5] 2550/// [C99] identifier 2551/// '(' declarator ')' 2552/// [GNU] '(' attributes declarator ')' 2553/// [C90] direct-declarator '[' constant-expression[opt] ']' 2554/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']' 2555/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']' 2556/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']' 2557/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']' 2558/// direct-declarator '(' parameter-type-list ')' 2559/// direct-declarator '(' identifier-list[opt] ')' 2560/// [GNU] direct-declarator '(' parameter-forward-declarations 2561/// parameter-type-list[opt] ')' 2562/// [C++] direct-declarator '(' parameter-declaration-clause ')' 2563/// cv-qualifier-seq[opt] exception-specification[opt] 2564/// [C++] declarator-id 2565/// 2566/// declarator-id: [C++ 8] 2567/// id-expression 2568/// '::'[opt] nested-name-specifier[opt] type-name 2569/// 2570/// id-expression: [C++ 5.1] 2571/// unqualified-id 2572/// qualified-id 2573/// 2574/// unqualified-id: [C++ 5.1] 2575/// identifier 2576/// operator-function-id 2577/// conversion-function-id 2578/// '~' class-name 2579/// template-id 2580/// 2581void Parser::ParseDirectDeclarator(Declarator &D) { 2582 DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec()); 2583 2584 if (getLang().CPlusPlus && D.mayHaveIdentifier()) { 2585 // ParseDeclaratorInternal might already have parsed the scope. 2586 bool afterCXXScope = D.getCXXScopeSpec().isSet(); 2587 if (!afterCXXScope) { 2588 ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec(), /*ObjectType=*/0, 2589 true); 2590 afterCXXScope = D.getCXXScopeSpec().isSet(); 2591 } 2592 2593 if (afterCXXScope) { 2594 if (Actions.ShouldEnterDeclaratorScope(CurScope, D.getCXXScopeSpec())) 2595 // Change the declaration context for name lookup, until this function 2596 // is exited (and the declarator has been parsed). 2597 DeclScopeObj.EnterDeclaratorScope(); 2598 } 2599 2600 if (Tok.is(tok::identifier) || Tok.is(tok::kw_operator) || 2601 Tok.is(tok::annot_template_id) || Tok.is(tok::tilde)) { 2602 // We found something that indicates the start of an unqualified-id. 2603 // Parse that unqualified-id. 2604 bool AllowConstructorName 2605 = ((D.getCXXScopeSpec().isSet() && 2606 D.getContext() == Declarator::FileContext) || 2607 (!D.getCXXScopeSpec().isSet() && 2608 D.getContext() == Declarator::MemberContext)) && 2609 !D.getDeclSpec().hasTypeSpecifier(); 2610 if (ParseUnqualifiedId(D.getCXXScopeSpec(), 2611 /*EnteringContext=*/true, 2612 /*AllowDestructorName=*/true, 2613 AllowConstructorName, 2614 /*ObjectType=*/0, 2615 D.getName())) { 2616 D.SetIdentifier(0, Tok.getLocation()); 2617 D.setInvalidType(true); 2618 } else { 2619 // Parsed the unqualified-id; update range information and move along. 2620 if (D.getSourceRange().getBegin().isInvalid()) 2621 D.SetRangeBegin(D.getName().getSourceRange().getBegin()); 2622 D.SetRangeEnd(D.getName().getSourceRange().getEnd()); 2623 } 2624 goto PastIdentifier; 2625 } 2626 } else if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) { 2627 assert(!getLang().CPlusPlus && 2628 "There's a C++-specific check for tok::identifier above"); 2629 assert(Tok.getIdentifierInfo() && "Not an identifier?"); 2630 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 2631 ConsumeToken(); 2632 goto PastIdentifier; 2633 } 2634 2635 if (Tok.is(tok::l_paren)) { 2636 // direct-declarator: '(' declarator ')' 2637 // direct-declarator: '(' attributes declarator ')' 2638 // Example: 'char (*X)' or 'int (*XX)(void)' 2639 ParseParenDeclarator(D); 2640 2641 // If the declarator was parenthesized, we entered the declarator 2642 // scope when parsing the parenthesized declarator, then exited 2643 // the scope already. Re-enter the scope, if we need to. 2644 if (D.getCXXScopeSpec().isSet()) { 2645 if (Actions.ShouldEnterDeclaratorScope(CurScope, D.getCXXScopeSpec())) 2646 // Change the declaration context for name lookup, until this function 2647 // is exited (and the declarator has been parsed). 2648 DeclScopeObj.EnterDeclaratorScope(); 2649 } 2650 } else if (D.mayOmitIdentifier()) { 2651 // This could be something simple like "int" (in which case the declarator 2652 // portion is empty), if an abstract-declarator is allowed. 2653 D.SetIdentifier(0, Tok.getLocation()); 2654 } else { 2655 if (D.getContext() == Declarator::MemberContext) 2656 Diag(Tok, diag::err_expected_member_name_or_semi) 2657 << D.getDeclSpec().getSourceRange(); 2658 else if (getLang().CPlusPlus) 2659 Diag(Tok, diag::err_expected_unqualified_id) << getLang().CPlusPlus; 2660 else 2661 Diag(Tok, diag::err_expected_ident_lparen); 2662 D.SetIdentifier(0, Tok.getLocation()); 2663 D.setInvalidType(true); 2664 } 2665 2666 PastIdentifier: 2667 assert(D.isPastIdentifier() && 2668 "Haven't past the location of the identifier yet?"); 2669 2670 // Don't parse attributes unless we have an identifier. 2671 if (D.getIdentifier() && getLang().CPlusPlus0x 2672 && isCXX0XAttributeSpecifier(true)) { 2673 SourceLocation AttrEndLoc; 2674 CXX0XAttributeList Attr = ParseCXX0XAttributes(); 2675 D.AddAttributes(Attr.AttrList, AttrEndLoc); 2676 } 2677 2678 while (1) { 2679 if (Tok.is(tok::l_paren)) { 2680 // The paren may be part of a C++ direct initializer, eg. "int x(1);". 2681 // In such a case, check if we actually have a function declarator; if it 2682 // is not, the declarator has been fully parsed. 2683 if (getLang().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) { 2684 // When not in file scope, warn for ambiguous function declarators, just 2685 // in case the author intended it as a variable definition. 2686 bool warnIfAmbiguous = D.getContext() != Declarator::FileContext; 2687 if (!isCXXFunctionDeclarator(warnIfAmbiguous)) 2688 break; 2689 } 2690 ParseFunctionDeclarator(ConsumeParen(), D); 2691 } else if (Tok.is(tok::l_square)) { 2692 ParseBracketDeclarator(D); 2693 } else { 2694 break; 2695 } 2696 } 2697} 2698 2699/// ParseParenDeclarator - We parsed the declarator D up to a paren. This is 2700/// only called before the identifier, so these are most likely just grouping 2701/// parens for precedence. If we find that these are actually function 2702/// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator. 2703/// 2704/// direct-declarator: 2705/// '(' declarator ')' 2706/// [GNU] '(' attributes declarator ')' 2707/// direct-declarator '(' parameter-type-list ')' 2708/// direct-declarator '(' identifier-list[opt] ')' 2709/// [GNU] direct-declarator '(' parameter-forward-declarations 2710/// parameter-type-list[opt] ')' 2711/// 2712void Parser::ParseParenDeclarator(Declarator &D) { 2713 SourceLocation StartLoc = ConsumeParen(); 2714 assert(!D.isPastIdentifier() && "Should be called before passing identifier"); 2715 2716 // Eat any attributes before we look at whether this is a grouping or function 2717 // declarator paren. If this is a grouping paren, the attribute applies to 2718 // the type being built up, for example: 2719 // int (__attribute__(()) *x)(long y) 2720 // If this ends up not being a grouping paren, the attribute applies to the 2721 // first argument, for example: 2722 // int (__attribute__(()) int x) 2723 // In either case, we need to eat any attributes to be able to determine what 2724 // sort of paren this is. 2725 // 2726 llvm::OwningPtr<AttributeList> AttrList; 2727 bool RequiresArg = false; 2728 if (Tok.is(tok::kw___attribute)) { 2729 AttrList.reset(ParseGNUAttributes()); 2730 2731 // We require that the argument list (if this is a non-grouping paren) be 2732 // present even if the attribute list was empty. 2733 RequiresArg = true; 2734 } 2735 // Eat any Microsoft extensions. 2736 if (Tok.is(tok::kw___cdecl) || Tok.is(tok::kw___stdcall) || 2737 Tok.is(tok::kw___fastcall) || Tok.is(tok::kw___w64) || 2738 Tok.is(tok::kw___ptr64)) { 2739 AttrList.reset(ParseMicrosoftTypeAttributes(AttrList.take())); 2740 } 2741 2742 // If we haven't past the identifier yet (or where the identifier would be 2743 // stored, if this is an abstract declarator), then this is probably just 2744 // grouping parens. However, if this could be an abstract-declarator, then 2745 // this could also be the start of function arguments (consider 'void()'). 2746 bool isGrouping; 2747 2748 if (!D.mayOmitIdentifier()) { 2749 // If this can't be an abstract-declarator, this *must* be a grouping 2750 // paren, because we haven't seen the identifier yet. 2751 isGrouping = true; 2752 } else if (Tok.is(tok::r_paren) || // 'int()' is a function. 2753 (getLang().CPlusPlus && Tok.is(tok::ellipsis)) || // C++ int(...) 2754 isDeclarationSpecifier()) { // 'int(int)' is a function. 2755 // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is 2756 // considered to be a type, not a K&R identifier-list. 2757 isGrouping = false; 2758 } else { 2759 // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'. 2760 isGrouping = true; 2761 } 2762 2763 // If this is a grouping paren, handle: 2764 // direct-declarator: '(' declarator ')' 2765 // direct-declarator: '(' attributes declarator ')' 2766 if (isGrouping) { 2767 bool hadGroupingParens = D.hasGroupingParens(); 2768 D.setGroupingParens(true); 2769 if (AttrList) 2770 D.AddAttributes(AttrList.take(), SourceLocation()); 2771 2772 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator); 2773 // Match the ')'. 2774 SourceLocation Loc = MatchRHSPunctuation(tok::r_paren, StartLoc); 2775 2776 D.setGroupingParens(hadGroupingParens); 2777 D.SetRangeEnd(Loc); 2778 return; 2779 } 2780 2781 // Okay, if this wasn't a grouping paren, it must be the start of a function 2782 // argument list. Recognize that this declarator will never have an 2783 // identifier (and remember where it would have been), then call into 2784 // ParseFunctionDeclarator to handle of argument list. 2785 D.SetIdentifier(0, Tok.getLocation()); 2786 2787 ParseFunctionDeclarator(StartLoc, D, AttrList.take(), RequiresArg); 2788} 2789 2790/// ParseFunctionDeclarator - We are after the identifier and have parsed the 2791/// declarator D up to a paren, which indicates that we are parsing function 2792/// arguments. 2793/// 2794/// If AttrList is non-null, then the caller parsed those arguments immediately 2795/// after the open paren - they should be considered to be the first argument of 2796/// a parameter. If RequiresArg is true, then the first argument of the 2797/// function is required to be present and required to not be an identifier 2798/// list. 2799/// 2800/// This method also handles this portion of the grammar: 2801/// parameter-type-list: [C99 6.7.5] 2802/// parameter-list 2803/// parameter-list ',' '...' 2804/// [C++] parameter-list '...' 2805/// 2806/// parameter-list: [C99 6.7.5] 2807/// parameter-declaration 2808/// parameter-list ',' parameter-declaration 2809/// 2810/// parameter-declaration: [C99 6.7.5] 2811/// declaration-specifiers declarator 2812/// [C++] declaration-specifiers declarator '=' assignment-expression 2813/// [GNU] declaration-specifiers declarator attributes 2814/// declaration-specifiers abstract-declarator[opt] 2815/// [C++] declaration-specifiers abstract-declarator[opt] 2816/// '=' assignment-expression 2817/// [GNU] declaration-specifiers abstract-declarator[opt] attributes 2818/// 2819/// For C++, after the parameter-list, it also parses "cv-qualifier-seq[opt]" 2820/// and "exception-specification[opt]". 2821/// 2822void Parser::ParseFunctionDeclarator(SourceLocation LParenLoc, Declarator &D, 2823 AttributeList *AttrList, 2824 bool RequiresArg) { 2825 // lparen is already consumed! 2826 assert(D.isPastIdentifier() && "Should not call before identifier!"); 2827 2828 // This parameter list may be empty. 2829 if (Tok.is(tok::r_paren)) { 2830 if (RequiresArg) { 2831 Diag(Tok, diag::err_argument_required_after_attribute); 2832 delete AttrList; 2833 } 2834 2835 SourceLocation RParenLoc = ConsumeParen(); // Eat the closing ')'. 2836 SourceLocation EndLoc = RParenLoc; 2837 2838 // cv-qualifier-seq[opt]. 2839 DeclSpec DS; 2840 bool hasExceptionSpec = false; 2841 SourceLocation ThrowLoc; 2842 bool hasAnyExceptionSpec = false; 2843 llvm::SmallVector<TypeTy*, 2> Exceptions; 2844 llvm::SmallVector<SourceRange, 2> ExceptionRanges; 2845 if (getLang().CPlusPlus) { 2846 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 2847 if (!DS.getSourceRange().getEnd().isInvalid()) 2848 EndLoc = DS.getSourceRange().getEnd(); 2849 2850 // Parse exception-specification[opt]. 2851 if (Tok.is(tok::kw_throw)) { 2852 hasExceptionSpec = true; 2853 ThrowLoc = Tok.getLocation(); 2854 ParseExceptionSpecification(EndLoc, Exceptions, ExceptionRanges, 2855 hasAnyExceptionSpec); 2856 assert(Exceptions.size() == ExceptionRanges.size() && 2857 "Produced different number of exception types and ranges."); 2858 } 2859 } 2860 2861 // Remember that we parsed a function type, and remember the attributes. 2862 // int() -> no prototype, no '...'. 2863 D.AddTypeInfo(DeclaratorChunk::getFunction(/*prototype*/getLang().CPlusPlus, 2864 /*variadic*/ false, 2865 SourceLocation(), 2866 /*arglist*/ 0, 0, 2867 DS.getTypeQualifiers(), 2868 hasExceptionSpec, ThrowLoc, 2869 hasAnyExceptionSpec, 2870 Exceptions.data(), 2871 ExceptionRanges.data(), 2872 Exceptions.size(), 2873 LParenLoc, RParenLoc, D), 2874 EndLoc); 2875 return; 2876 } 2877 2878 // Alternatively, this parameter list may be an identifier list form for a 2879 // K&R-style function: void foo(a,b,c) 2880 if (!getLang().CPlusPlus && Tok.is(tok::identifier) 2881 && !TryAltiVecVectorToken()) { 2882 if (TryAnnotateTypeOrScopeToken() || !Tok.is(tok::annot_typename)) { 2883 // K&R identifier lists can't have typedefs as identifiers, per 2884 // C99 6.7.5.3p11. 2885 if (RequiresArg) { 2886 Diag(Tok, diag::err_argument_required_after_attribute); 2887 delete AttrList; 2888 } 2889 // Identifier list. Note that '(' identifier-list ')' is only allowed for 2890 // normal declarators, not for abstract-declarators. 2891 return ParseFunctionDeclaratorIdentifierList(LParenLoc, D); 2892 } 2893 } 2894 2895 // Finally, a normal, non-empty parameter type list. 2896 2897 // Build up an array of information about the parsed arguments. 2898 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; 2899 2900 // Enter function-declaration scope, limiting any declarators to the 2901 // function prototype scope, including parameter declarators. 2902 ParseScope PrototypeScope(this, 2903 Scope::FunctionPrototypeScope|Scope::DeclScope); 2904 2905 bool IsVariadic = false; 2906 SourceLocation EllipsisLoc; 2907 while (1) { 2908 if (Tok.is(tok::ellipsis)) { 2909 IsVariadic = true; 2910 EllipsisLoc = ConsumeToken(); // Consume the ellipsis. 2911 break; 2912 } 2913 2914 SourceLocation DSStart = Tok.getLocation(); 2915 2916 // Parse the declaration-specifiers. 2917 // Just use the ParsingDeclaration "scope" of the declarator. 2918 DeclSpec DS; 2919 2920 // If the caller parsed attributes for the first argument, add them now. 2921 if (AttrList) { 2922 DS.AddAttributes(AttrList); 2923 AttrList = 0; // Only apply the attributes to the first parameter. 2924 } 2925 ParseDeclarationSpecifiers(DS); 2926 2927 // Parse the declarator. This is "PrototypeContext", because we must 2928 // accept either 'declarator' or 'abstract-declarator' here. 2929 Declarator ParmDecl(DS, Declarator::PrototypeContext); 2930 ParseDeclarator(ParmDecl); 2931 2932 // Parse GNU attributes, if present. 2933 if (Tok.is(tok::kw___attribute)) { 2934 SourceLocation Loc; 2935 AttributeList *AttrList = ParseGNUAttributes(&Loc); 2936 ParmDecl.AddAttributes(AttrList, Loc); 2937 } 2938 2939 // Remember this parsed parameter in ParamInfo. 2940 IdentifierInfo *ParmII = ParmDecl.getIdentifier(); 2941 2942 // DefArgToks is used when the parsing of default arguments needs 2943 // to be delayed. 2944 CachedTokens *DefArgToks = 0; 2945 2946 // If no parameter was specified, verify that *something* was specified, 2947 // otherwise we have a missing type and identifier. 2948 if (DS.isEmpty() && ParmDecl.getIdentifier() == 0 && 2949 ParmDecl.getNumTypeObjects() == 0) { 2950 // Completely missing, emit error. 2951 Diag(DSStart, diag::err_missing_param); 2952 } else { 2953 // Otherwise, we have something. Add it and let semantic analysis try 2954 // to grok it and add the result to the ParamInfo we are building. 2955 2956 // Inform the actions module about the parameter declarator, so it gets 2957 // added to the current scope. 2958 DeclPtrTy Param = Actions.ActOnParamDeclarator(CurScope, ParmDecl); 2959 2960 // Parse the default argument, if any. We parse the default 2961 // arguments in all dialects; the semantic analysis in 2962 // ActOnParamDefaultArgument will reject the default argument in 2963 // C. 2964 if (Tok.is(tok::equal)) { 2965 SourceLocation EqualLoc = Tok.getLocation(); 2966 2967 // Parse the default argument 2968 if (D.getContext() == Declarator::MemberContext) { 2969 // If we're inside a class definition, cache the tokens 2970 // corresponding to the default argument. We'll actually parse 2971 // them when we see the end of the class definition. 2972 // FIXME: Templates will require something similar. 2973 // FIXME: Can we use a smart pointer for Toks? 2974 DefArgToks = new CachedTokens; 2975 2976 if (!ConsumeAndStoreUntil(tok::comma, tok::r_paren, *DefArgToks, 2977 tok::semi, false)) { 2978 delete DefArgToks; 2979 DefArgToks = 0; 2980 Actions.ActOnParamDefaultArgumentError(Param); 2981 } else 2982 Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc, 2983 (*DefArgToks)[1].getLocation()); 2984 } else { 2985 // Consume the '='. 2986 ConsumeToken(); 2987 2988 OwningExprResult DefArgResult(ParseAssignmentExpression()); 2989 if (DefArgResult.isInvalid()) { 2990 Actions.ActOnParamDefaultArgumentError(Param); 2991 SkipUntil(tok::comma, tok::r_paren, true, true); 2992 } else { 2993 // Inform the actions module about the default argument 2994 Actions.ActOnParamDefaultArgument(Param, EqualLoc, 2995 move(DefArgResult)); 2996 } 2997 } 2998 } 2999 3000 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, 3001 ParmDecl.getIdentifierLoc(), Param, 3002 DefArgToks)); 3003 } 3004 3005 // If the next token is a comma, consume it and keep reading arguments. 3006 if (Tok.isNot(tok::comma)) { 3007 if (Tok.is(tok::ellipsis)) { 3008 IsVariadic = true; 3009 EllipsisLoc = ConsumeToken(); // Consume the ellipsis. 3010 3011 if (!getLang().CPlusPlus) { 3012 // We have ellipsis without a preceding ',', which is ill-formed 3013 // in C. Complain and provide the fix. 3014 Diag(EllipsisLoc, diag::err_missing_comma_before_ellipsis) 3015 << FixItHint::CreateInsertion(EllipsisLoc, ", "); 3016 } 3017 } 3018 3019 break; 3020 } 3021 3022 // Consume the comma. 3023 ConsumeToken(); 3024 } 3025 3026 // Leave prototype scope. 3027 PrototypeScope.Exit(); 3028 3029 // If we have the closing ')', eat it. 3030 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 3031 SourceLocation EndLoc = RParenLoc; 3032 3033 DeclSpec DS; 3034 bool hasExceptionSpec = false; 3035 SourceLocation ThrowLoc; 3036 bool hasAnyExceptionSpec = false; 3037 llvm::SmallVector<TypeTy*, 2> Exceptions; 3038 llvm::SmallVector<SourceRange, 2> ExceptionRanges; 3039 3040 if (getLang().CPlusPlus) { 3041 // Parse cv-qualifier-seq[opt]. 3042 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 3043 if (!DS.getSourceRange().getEnd().isInvalid()) 3044 EndLoc = DS.getSourceRange().getEnd(); 3045 3046 // Parse exception-specification[opt]. 3047 if (Tok.is(tok::kw_throw)) { 3048 hasExceptionSpec = true; 3049 ThrowLoc = Tok.getLocation(); 3050 ParseExceptionSpecification(EndLoc, Exceptions, ExceptionRanges, 3051 hasAnyExceptionSpec); 3052 assert(Exceptions.size() == ExceptionRanges.size() && 3053 "Produced different number of exception types and ranges."); 3054 } 3055 } 3056 3057 // Remember that we parsed a function type, and remember the attributes. 3058 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/true, IsVariadic, 3059 EllipsisLoc, 3060 ParamInfo.data(), ParamInfo.size(), 3061 DS.getTypeQualifiers(), 3062 hasExceptionSpec, ThrowLoc, 3063 hasAnyExceptionSpec, 3064 Exceptions.data(), 3065 ExceptionRanges.data(), 3066 Exceptions.size(), 3067 LParenLoc, RParenLoc, D), 3068 EndLoc); 3069} 3070 3071/// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator 3072/// we found a K&R-style identifier list instead of a type argument list. The 3073/// current token is known to be the first identifier in the list. 3074/// 3075/// identifier-list: [C99 6.7.5] 3076/// identifier 3077/// identifier-list ',' identifier 3078/// 3079void Parser::ParseFunctionDeclaratorIdentifierList(SourceLocation LParenLoc, 3080 Declarator &D) { 3081 // Build up an array of information about the parsed arguments. 3082 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; 3083 llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar; 3084 3085 // If there was no identifier specified for the declarator, either we are in 3086 // an abstract-declarator, or we are in a parameter declarator which was found 3087 // to be abstract. In abstract-declarators, identifier lists are not valid: 3088 // diagnose this. 3089 if (!D.getIdentifier()) 3090 Diag(Tok, diag::ext_ident_list_in_param); 3091 3092 // Tok is known to be the first identifier in the list. Remember this 3093 // identifier in ParamInfo. 3094 ParamsSoFar.insert(Tok.getIdentifierInfo()); 3095 ParamInfo.push_back(DeclaratorChunk::ParamInfo(Tok.getIdentifierInfo(), 3096 Tok.getLocation(), 3097 DeclPtrTy())); 3098 3099 ConsumeToken(); // eat the first identifier. 3100 3101 while (Tok.is(tok::comma)) { 3102 // Eat the comma. 3103 ConsumeToken(); 3104 3105 // If this isn't an identifier, report the error and skip until ')'. 3106 if (Tok.isNot(tok::identifier)) { 3107 Diag(Tok, diag::err_expected_ident); 3108 SkipUntil(tok::r_paren); 3109 return; 3110 } 3111 3112 IdentifierInfo *ParmII = Tok.getIdentifierInfo(); 3113 3114 // Reject 'typedef int y; int test(x, y)', but continue parsing. 3115 if (Actions.getTypeName(*ParmII, Tok.getLocation(), CurScope)) 3116 Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII; 3117 3118 // Verify that the argument identifier has not already been mentioned. 3119 if (!ParamsSoFar.insert(ParmII)) { 3120 Diag(Tok, diag::err_param_redefinition) << ParmII; 3121 } else { 3122 // Remember this identifier in ParamInfo. 3123 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, 3124 Tok.getLocation(), 3125 DeclPtrTy())); 3126 } 3127 3128 // Eat the identifier. 3129 ConsumeToken(); 3130 } 3131 3132 // If we have the closing ')', eat it and we're done. 3133 SourceLocation RLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 3134 3135 // Remember that we parsed a function type, and remember the attributes. This 3136 // function type is always a K&R style function type, which is not varargs and 3137 // has no prototype. 3138 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/false, /*varargs*/false, 3139 SourceLocation(), 3140 &ParamInfo[0], ParamInfo.size(), 3141 /*TypeQuals*/0, 3142 /*exception*/false, 3143 SourceLocation(), false, 0, 0, 0, 3144 LParenLoc, RLoc, D), 3145 RLoc); 3146} 3147 3148/// [C90] direct-declarator '[' constant-expression[opt] ']' 3149/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']' 3150/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']' 3151/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']' 3152/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']' 3153void Parser::ParseBracketDeclarator(Declarator &D) { 3154 SourceLocation StartLoc = ConsumeBracket(); 3155 3156 // C array syntax has many features, but by-far the most common is [] and [4]. 3157 // This code does a fast path to handle some of the most obvious cases. 3158 if (Tok.getKind() == tok::r_square) { 3159 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 3160 //FIXME: Use these 3161 CXX0XAttributeList Attr; 3162 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier(true)) { 3163 Attr = ParseCXX0XAttributes(); 3164 } 3165 3166 // Remember that we parsed the empty array type. 3167 OwningExprResult NumElements(Actions); 3168 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, 0, 3169 StartLoc, EndLoc), 3170 EndLoc); 3171 return; 3172 } else if (Tok.getKind() == tok::numeric_constant && 3173 GetLookAheadToken(1).is(tok::r_square)) { 3174 // [4] is very common. Parse the numeric constant expression. 3175 OwningExprResult ExprRes(Actions.ActOnNumericConstant(Tok)); 3176 ConsumeToken(); 3177 3178 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 3179 //FIXME: Use these 3180 CXX0XAttributeList Attr; 3181 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 3182 Attr = ParseCXX0XAttributes(); 3183 } 3184 3185 // If there was an error parsing the assignment-expression, recover. 3186 if (ExprRes.isInvalid()) 3187 ExprRes.release(); // Deallocate expr, just use []. 3188 3189 // Remember that we parsed a array type, and remember its features. 3190 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, 0, ExprRes.release(), 3191 StartLoc, EndLoc), 3192 EndLoc); 3193 return; 3194 } 3195 3196 // If valid, this location is the position where we read the 'static' keyword. 3197 SourceLocation StaticLoc; 3198 if (Tok.is(tok::kw_static)) 3199 StaticLoc = ConsumeToken(); 3200 3201 // If there is a type-qualifier-list, read it now. 3202 // Type qualifiers in an array subscript are a C99 feature. 3203 DeclSpec DS; 3204 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 3205 3206 // If we haven't already read 'static', check to see if there is one after the 3207 // type-qualifier-list. 3208 if (!StaticLoc.isValid() && Tok.is(tok::kw_static)) 3209 StaticLoc = ConsumeToken(); 3210 3211 // Handle "direct-declarator [ type-qual-list[opt] * ]". 3212 bool isStar = false; 3213 OwningExprResult NumElements(Actions); 3214 3215 // Handle the case where we have '[*]' as the array size. However, a leading 3216 // star could be the start of an expression, for example 'X[*p + 4]'. Verify 3217 // the the token after the star is a ']'. Since stars in arrays are 3218 // infrequent, use of lookahead is not costly here. 3219 if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) { 3220 ConsumeToken(); // Eat the '*'. 3221 3222 if (StaticLoc.isValid()) { 3223 Diag(StaticLoc, diag::err_unspecified_vla_size_with_static); 3224 StaticLoc = SourceLocation(); // Drop the static. 3225 } 3226 isStar = true; 3227 } else if (Tok.isNot(tok::r_square)) { 3228 // Note, in C89, this production uses the constant-expr production instead 3229 // of assignment-expr. The only difference is that assignment-expr allows 3230 // things like '=' and '*='. Sema rejects these in C89 mode because they 3231 // are not i-c-e's, so we don't need to distinguish between the two here. 3232 3233 // Parse the constant-expression or assignment-expression now (depending 3234 // on dialect). 3235 if (getLang().CPlusPlus) 3236 NumElements = ParseConstantExpression(); 3237 else 3238 NumElements = ParseAssignmentExpression(); 3239 } 3240 3241 // If there was an error parsing the assignment-expression, recover. 3242 if (NumElements.isInvalid()) { 3243 D.setInvalidType(true); 3244 // If the expression was invalid, skip it. 3245 SkipUntil(tok::r_square); 3246 return; 3247 } 3248 3249 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 3250 3251 //FIXME: Use these 3252 CXX0XAttributeList Attr; 3253 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 3254 Attr = ParseCXX0XAttributes(); 3255 } 3256 3257 // Remember that we parsed a array type, and remember its features. 3258 D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(), 3259 StaticLoc.isValid(), isStar, 3260 NumElements.release(), 3261 StartLoc, EndLoc), 3262 EndLoc); 3263} 3264 3265/// [GNU] typeof-specifier: 3266/// typeof ( expressions ) 3267/// typeof ( type-name ) 3268/// [GNU/C++] typeof unary-expression 3269/// 3270void Parser::ParseTypeofSpecifier(DeclSpec &DS) { 3271 assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier"); 3272 Token OpTok = Tok; 3273 SourceLocation StartLoc = ConsumeToken(); 3274 3275 const bool hasParens = Tok.is(tok::l_paren); 3276 3277 bool isCastExpr; 3278 TypeTy *CastTy; 3279 SourceRange CastRange; 3280 OwningExprResult Operand = ParseExprAfterTypeofSizeofAlignof(OpTok, 3281 isCastExpr, 3282 CastTy, 3283 CastRange); 3284 if (hasParens) 3285 DS.setTypeofParensRange(CastRange); 3286 3287 if (CastRange.getEnd().isInvalid()) 3288 // FIXME: Not accurate, the range gets one token more than it should. 3289 DS.SetRangeEnd(Tok.getLocation()); 3290 else 3291 DS.SetRangeEnd(CastRange.getEnd()); 3292 3293 if (isCastExpr) { 3294 if (!CastTy) { 3295 DS.SetTypeSpecError(); 3296 return; 3297 } 3298 3299 const char *PrevSpec = 0; 3300 unsigned DiagID; 3301 // Check for duplicate type specifiers (e.g. "int typeof(int)"). 3302 if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec, 3303 DiagID, CastTy)) 3304 Diag(StartLoc, DiagID) << PrevSpec; 3305 return; 3306 } 3307 3308 // If we get here, the operand to the typeof was an expresion. 3309 if (Operand.isInvalid()) { 3310 DS.SetTypeSpecError(); 3311 return; 3312 } 3313 3314 const char *PrevSpec = 0; 3315 unsigned DiagID; 3316 // Check for duplicate type specifiers (e.g. "int typeof(int)"). 3317 if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec, 3318 DiagID, Operand.release())) 3319 Diag(StartLoc, DiagID) << PrevSpec; 3320} 3321 3322 3323/// TryAltiVecVectorTokenOutOfLine - Out of line body that should only be called 3324/// from TryAltiVecVectorToken. 3325bool Parser::TryAltiVecVectorTokenOutOfLine() { 3326 Token Next = NextToken(); 3327 switch (Next.getKind()) { 3328 default: return false; 3329 case tok::kw_short: 3330 case tok::kw_long: 3331 case tok::kw_signed: 3332 case tok::kw_unsigned: 3333 case tok::kw_void: 3334 case tok::kw_char: 3335 case tok::kw_int: 3336 case tok::kw_float: 3337 case tok::kw_double: 3338 case tok::kw_bool: 3339 case tok::kw___pixel: 3340 Tok.setKind(tok::kw___vector); 3341 return true; 3342 case tok::identifier: 3343 if (Next.getIdentifierInfo() == Ident_pixel) { 3344 Tok.setKind(tok::kw___vector); 3345 return true; 3346 } 3347 return false; 3348 } 3349} 3350 3351bool Parser::TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc, 3352 const char *&PrevSpec, unsigned &DiagID, 3353 bool &isInvalid) { 3354 if (Tok.getIdentifierInfo() == Ident_vector) { 3355 Token Next = NextToken(); 3356 switch (Next.getKind()) { 3357 case tok::kw_short: 3358 case tok::kw_long: 3359 case tok::kw_signed: 3360 case tok::kw_unsigned: 3361 case tok::kw_void: 3362 case tok::kw_char: 3363 case tok::kw_int: 3364 case tok::kw_float: 3365 case tok::kw_double: 3366 case tok::kw_bool: 3367 case tok::kw___pixel: 3368 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 3369 return true; 3370 case tok::identifier: 3371 if (Next.getIdentifierInfo() == Ident_pixel) { 3372 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 3373 return true; 3374 } 3375 break; 3376 default: 3377 break; 3378 } 3379 } else if (Tok.getIdentifierInfo() == Ident_pixel && 3380 DS.isTypeAltiVecVector()) { 3381 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID); 3382 return true; 3383 } 3384 return false; 3385} 3386 3387