ParseDecl.cpp revision ec1afbfd8e880d0169aab0ececa2e7e1611f4955
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); 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. 352Parser::DeclGroupPtrTy Parser::ParseSimpleDeclaration(unsigned Context, 353 SourceLocation &DeclEnd, 354 AttributeList *Attr) { 355 // Parse the common declaration-specifiers piece. 356 ParsingDeclSpec DS(*this); 357 if (Attr) 358 DS.AddAttributes(Attr); 359 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS_none, 360 getDeclSpecContextFromDeclaratorContext(Context)); 361 362 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 363 // declaration-specifiers init-declarator-list[opt] ';' 364 if (Tok.is(tok::semi)) { 365 ConsumeToken(); 366 DeclPtrTy TheDecl = Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 367 DS.complete(TheDecl); 368 return Actions.ConvertDeclToDeclGroup(TheDecl); 369 } 370 371 DeclGroupPtrTy DG = ParseDeclGroup(DS, Context, /*FunctionDefs=*/ false, 372 &DeclEnd); 373 return DG; 374} 375 376/// ParseDeclGroup - Having concluded that this is either a function 377/// definition or a group of object declarations, actually parse the 378/// result. 379Parser::DeclGroupPtrTy Parser::ParseDeclGroup(ParsingDeclSpec &DS, 380 unsigned Context, 381 bool AllowFunctionDefinitions, 382 SourceLocation *DeclEnd) { 383 // Parse the first declarator. 384 ParsingDeclarator D(*this, DS, static_cast<Declarator::TheContext>(Context)); 385 ParseDeclarator(D); 386 387 // Bail out if the first declarator didn't seem well-formed. 388 if (!D.hasName() && !D.mayOmitIdentifier()) { 389 // Skip until ; or }. 390 SkipUntil(tok::r_brace, true, true); 391 if (Tok.is(tok::semi)) 392 ConsumeToken(); 393 return DeclGroupPtrTy(); 394 } 395 396 if (AllowFunctionDefinitions && D.isFunctionDeclarator()) { 397 if (isDeclarationAfterDeclarator()) { 398 // Fall though. We have to check this first, though, because 399 // __attribute__ might be the start of a function definition in 400 // (extended) K&R C. 401 } else if (isStartOfFunctionDefinition()) { 402 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 403 Diag(Tok, diag::err_function_declared_typedef); 404 405 // Recover by treating the 'typedef' as spurious. 406 DS.ClearStorageClassSpecs(); 407 } 408 409 DeclPtrTy TheDecl = ParseFunctionDefinition(D); 410 return Actions.ConvertDeclToDeclGroup(TheDecl); 411 } else { 412 Diag(Tok, diag::err_expected_fn_body); 413 SkipUntil(tok::semi); 414 return DeclGroupPtrTy(); 415 } 416 } 417 418 llvm::SmallVector<DeclPtrTy, 8> DeclsInGroup; 419 DeclPtrTy FirstDecl = ParseDeclarationAfterDeclarator(D); 420 D.complete(FirstDecl); 421 if (FirstDecl.get()) 422 DeclsInGroup.push_back(FirstDecl); 423 424 // If we don't have a comma, it is either the end of the list (a ';') or an 425 // error, bail out. 426 while (Tok.is(tok::comma)) { 427 // Consume the comma. 428 ConsumeToken(); 429 430 // Parse the next declarator. 431 D.clear(); 432 433 // Accept attributes in an init-declarator. In the first declarator in a 434 // declaration, these would be part of the declspec. In subsequent 435 // declarators, they become part of the declarator itself, so that they 436 // don't apply to declarators after *this* one. Examples: 437 // short __attribute__((common)) var; -> declspec 438 // short var __attribute__((common)); -> declarator 439 // short x, __attribute__((common)) var; -> declarator 440 if (Tok.is(tok::kw___attribute)) { 441 SourceLocation Loc; 442 AttributeList *AttrList = ParseGNUAttributes(&Loc); 443 D.AddAttributes(AttrList, Loc); 444 } 445 446 ParseDeclarator(D); 447 448 DeclPtrTy ThisDecl = ParseDeclarationAfterDeclarator(D); 449 D.complete(ThisDecl); 450 if (ThisDecl.get()) 451 DeclsInGroup.push_back(ThisDecl); 452 } 453 454 if (DeclEnd) 455 *DeclEnd = Tok.getLocation(); 456 457 if (Context != Declarator::ForContext && 458 ExpectAndConsume(tok::semi, 459 Context == Declarator::FileContext 460 ? diag::err_invalid_token_after_toplevel_declarator 461 : diag::err_expected_semi_declaration)) { 462 SkipUntil(tok::r_brace, true, true); 463 if (Tok.is(tok::semi)) 464 ConsumeToken(); 465 } 466 467 return Actions.FinalizeDeclaratorGroup(CurScope, DS, 468 DeclsInGroup.data(), 469 DeclsInGroup.size()); 470} 471 472/// \brief Parse 'declaration' after parsing 'declaration-specifiers 473/// declarator'. This method parses the remainder of the declaration 474/// (including any attributes or initializer, among other things) and 475/// finalizes the declaration. 476/// 477/// init-declarator: [C99 6.7] 478/// declarator 479/// declarator '=' initializer 480/// [GNU] declarator simple-asm-expr[opt] attributes[opt] 481/// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer 482/// [C++] declarator initializer[opt] 483/// 484/// [C++] initializer: 485/// [C++] '=' initializer-clause 486/// [C++] '(' expression-list ')' 487/// [C++0x] '=' 'default' [TODO] 488/// [C++0x] '=' 'delete' 489/// 490/// According to the standard grammar, =default and =delete are function 491/// definitions, but that definitely doesn't fit with the parser here. 492/// 493Parser::DeclPtrTy Parser::ParseDeclarationAfterDeclarator(Declarator &D, 494 const ParsedTemplateInfo &TemplateInfo) { 495 // If a simple-asm-expr is present, parse it. 496 if (Tok.is(tok::kw_asm)) { 497 SourceLocation Loc; 498 OwningExprResult AsmLabel(ParseSimpleAsm(&Loc)); 499 if (AsmLabel.isInvalid()) { 500 SkipUntil(tok::semi, true, true); 501 return DeclPtrTy(); 502 } 503 504 D.setAsmLabel(AsmLabel.release()); 505 D.SetRangeEnd(Loc); 506 } 507 508 // If attributes are present, parse them. 509 if (Tok.is(tok::kw___attribute)) { 510 SourceLocation Loc; 511 AttributeList *AttrList = ParseGNUAttributes(&Loc); 512 D.AddAttributes(AttrList, Loc); 513 } 514 515 // Inform the current actions module that we just parsed this declarator. 516 DeclPtrTy ThisDecl; 517 switch (TemplateInfo.Kind) { 518 case ParsedTemplateInfo::NonTemplate: 519 ThisDecl = Actions.ActOnDeclarator(CurScope, D); 520 break; 521 522 case ParsedTemplateInfo::Template: 523 case ParsedTemplateInfo::ExplicitSpecialization: 524 ThisDecl = Actions.ActOnTemplateDeclarator(CurScope, 525 Action::MultiTemplateParamsArg(Actions, 526 TemplateInfo.TemplateParams->data(), 527 TemplateInfo.TemplateParams->size()), 528 D); 529 break; 530 531 case ParsedTemplateInfo::ExplicitInstantiation: { 532 Action::DeclResult ThisRes 533 = Actions.ActOnExplicitInstantiation(CurScope, 534 TemplateInfo.ExternLoc, 535 TemplateInfo.TemplateLoc, 536 D); 537 if (ThisRes.isInvalid()) { 538 SkipUntil(tok::semi, true, true); 539 return DeclPtrTy(); 540 } 541 542 ThisDecl = ThisRes.get(); 543 break; 544 } 545 } 546 547 // Parse declarator '=' initializer. 548 if (Tok.is(tok::equal)) { 549 ConsumeToken(); 550 if (getLang().CPlusPlus0x && Tok.is(tok::kw_delete)) { 551 SourceLocation DelLoc = ConsumeToken(); 552 Actions.SetDeclDeleted(ThisDecl, DelLoc); 553 } else { 554 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 555 EnterScope(0); 556 Actions.ActOnCXXEnterDeclInitializer(CurScope, ThisDecl); 557 } 558 559 OwningExprResult Init(ParseInitializer()); 560 561 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 562 Actions.ActOnCXXExitDeclInitializer(CurScope, ThisDecl); 563 ExitScope(); 564 } 565 566 if (Init.isInvalid()) { 567 SkipUntil(tok::comma, true, true); 568 Actions.ActOnInitializerError(ThisDecl); 569 } else 570 Actions.AddInitializerToDecl(ThisDecl, move(Init)); 571 } 572 } else if (Tok.is(tok::l_paren)) { 573 // Parse C++ direct initializer: '(' expression-list ')' 574 SourceLocation LParenLoc = ConsumeParen(); 575 ExprVector Exprs(Actions); 576 CommaLocsTy CommaLocs; 577 578 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 579 EnterScope(0); 580 Actions.ActOnCXXEnterDeclInitializer(CurScope, ThisDecl); 581 } 582 583 if (ParseExpressionList(Exprs, CommaLocs)) { 584 SkipUntil(tok::r_paren); 585 586 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 587 Actions.ActOnCXXExitDeclInitializer(CurScope, ThisDecl); 588 ExitScope(); 589 } 590 } else { 591 // Match the ')'. 592 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 593 594 assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() && 595 "Unexpected number of commas!"); 596 597 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 598 Actions.ActOnCXXExitDeclInitializer(CurScope, ThisDecl); 599 ExitScope(); 600 } 601 602 Actions.AddCXXDirectInitializerToDecl(ThisDecl, LParenLoc, 603 move_arg(Exprs), 604 CommaLocs.data(), RParenLoc); 605 } 606 } else { 607 bool TypeContainsUndeducedAuto = 608 D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto; 609 Actions.ActOnUninitializedDecl(ThisDecl, TypeContainsUndeducedAuto); 610 } 611 612 return ThisDecl; 613} 614 615/// ParseSpecifierQualifierList 616/// specifier-qualifier-list: 617/// type-specifier specifier-qualifier-list[opt] 618/// type-qualifier specifier-qualifier-list[opt] 619/// [GNU] attributes specifier-qualifier-list[opt] 620/// 621void Parser::ParseSpecifierQualifierList(DeclSpec &DS) { 622 /// specifier-qualifier-list is a subset of declaration-specifiers. Just 623 /// parse declaration-specifiers and complain about extra stuff. 624 ParseDeclarationSpecifiers(DS); 625 626 // Validate declspec for type-name. 627 unsigned Specs = DS.getParsedSpecifiers(); 628 if (Specs == DeclSpec::PQ_None && !DS.getNumProtocolQualifiers() && 629 !DS.getAttributes()) 630 Diag(Tok, diag::err_typename_requires_specqual); 631 632 // Issue diagnostic and remove storage class if present. 633 if (Specs & DeclSpec::PQ_StorageClassSpecifier) { 634 if (DS.getStorageClassSpecLoc().isValid()) 635 Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass); 636 else 637 Diag(DS.getThreadSpecLoc(), diag::err_typename_invalid_storageclass); 638 DS.ClearStorageClassSpecs(); 639 } 640 641 // Issue diagnostic and remove function specfier if present. 642 if (Specs & DeclSpec::PQ_FunctionSpecifier) { 643 if (DS.isInlineSpecified()) 644 Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec); 645 if (DS.isVirtualSpecified()) 646 Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec); 647 if (DS.isExplicitSpecified()) 648 Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec); 649 DS.ClearFunctionSpecs(); 650 } 651} 652 653/// isValidAfterIdentifierInDeclaratorAfterDeclSpec - Return true if the 654/// specified token is valid after the identifier in a declarator which 655/// immediately follows the declspec. For example, these things are valid: 656/// 657/// int x [ 4]; // direct-declarator 658/// int x ( int y); // direct-declarator 659/// int(int x ) // direct-declarator 660/// int x ; // simple-declaration 661/// int x = 17; // init-declarator-list 662/// int x , y; // init-declarator-list 663/// int x __asm__ ("foo"); // init-declarator-list 664/// int x : 4; // struct-declarator 665/// int x { 5}; // C++'0x unified initializers 666/// 667/// This is not, because 'x' does not immediately follow the declspec (though 668/// ')' happens to be valid anyway). 669/// int (x) 670/// 671static bool isValidAfterIdentifierInDeclarator(const Token &T) { 672 return T.is(tok::l_square) || T.is(tok::l_paren) || T.is(tok::r_paren) || 673 T.is(tok::semi) || T.is(tok::comma) || T.is(tok::equal) || 674 T.is(tok::kw_asm) || T.is(tok::l_brace) || T.is(tok::colon); 675} 676 677 678/// ParseImplicitInt - This method is called when we have an non-typename 679/// identifier in a declspec (which normally terminates the decl spec) when 680/// the declspec has no type specifier. In this case, the declspec is either 681/// malformed or is "implicit int" (in K&R and C89). 682/// 683/// This method handles diagnosing this prettily and returns false if the 684/// declspec is done being processed. If it recovers and thinks there may be 685/// other pieces of declspec after it, it returns true. 686/// 687bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS, 688 const ParsedTemplateInfo &TemplateInfo, 689 AccessSpecifier AS) { 690 assert(Tok.is(tok::identifier) && "should have identifier"); 691 692 SourceLocation Loc = Tok.getLocation(); 693 // If we see an identifier that is not a type name, we normally would 694 // parse it as the identifer being declared. However, when a typename 695 // is typo'd or the definition is not included, this will incorrectly 696 // parse the typename as the identifier name and fall over misparsing 697 // later parts of the diagnostic. 698 // 699 // As such, we try to do some look-ahead in cases where this would 700 // otherwise be an "implicit-int" case to see if this is invalid. For 701 // example: "static foo_t x = 4;" In this case, if we parsed foo_t as 702 // an identifier with implicit int, we'd get a parse error because the 703 // next token is obviously invalid for a type. Parse these as a case 704 // with an invalid type specifier. 705 assert(!DS.hasTypeSpecifier() && "Type specifier checked above"); 706 707 // Since we know that this either implicit int (which is rare) or an 708 // error, we'd do lookahead to try to do better recovery. 709 if (isValidAfterIdentifierInDeclarator(NextToken())) { 710 // If this token is valid for implicit int, e.g. "static x = 4", then 711 // we just avoid eating the identifier, so it will be parsed as the 712 // identifier in the declarator. 713 return false; 714 } 715 716 // Otherwise, if we don't consume this token, we are going to emit an 717 // error anyway. Try to recover from various common problems. Check 718 // to see if this was a reference to a tag name without a tag specified. 719 // This is a common problem in C (saying 'foo' instead of 'struct foo'). 720 // 721 // C++ doesn't need this, and isTagName doesn't take SS. 722 if (SS == 0) { 723 const char *TagName = 0; 724 tok::TokenKind TagKind = tok::unknown; 725 726 switch (Actions.isTagName(*Tok.getIdentifierInfo(), CurScope)) { 727 default: break; 728 case DeclSpec::TST_enum: TagName="enum" ;TagKind=tok::kw_enum ;break; 729 case DeclSpec::TST_union: TagName="union" ;TagKind=tok::kw_union ;break; 730 case DeclSpec::TST_struct:TagName="struct";TagKind=tok::kw_struct;break; 731 case DeclSpec::TST_class: TagName="class" ;TagKind=tok::kw_class ;break; 732 } 733 734 if (TagName) { 735 Diag(Loc, diag::err_use_of_tag_name_without_tag) 736 << Tok.getIdentifierInfo() << TagName << getLang().CPlusPlus 737 << CodeModificationHint::CreateInsertion(Tok.getLocation(),TagName); 738 739 // Parse this as a tag as if the missing tag were present. 740 if (TagKind == tok::kw_enum) 741 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS); 742 else 743 ParseClassSpecifier(TagKind, Loc, DS, TemplateInfo, AS); 744 return true; 745 } 746 } 747 748 // This is almost certainly an invalid type name. Let the action emit a 749 // diagnostic and attempt to recover. 750 Action::TypeTy *T = 0; 751 if (Actions.DiagnoseUnknownTypeName(*Tok.getIdentifierInfo(), Loc, 752 CurScope, SS, T)) { 753 // The action emitted a diagnostic, so we don't have to. 754 if (T) { 755 // The action has suggested that the type T could be used. Set that as 756 // the type in the declaration specifiers, consume the would-be type 757 // name token, and we're done. 758 const char *PrevSpec; 759 unsigned DiagID; 760 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, T, 761 false); 762 DS.SetRangeEnd(Tok.getLocation()); 763 ConsumeToken(); 764 765 // There may be other declaration specifiers after this. 766 return true; 767 } 768 769 // Fall through; the action had no suggestion for us. 770 } else { 771 // The action did not emit a diagnostic, so emit one now. 772 SourceRange R; 773 if (SS) R = SS->getRange(); 774 Diag(Loc, diag::err_unknown_typename) << Tok.getIdentifierInfo() << R; 775 } 776 777 // Mark this as an error. 778 const char *PrevSpec; 779 unsigned DiagID; 780 DS.SetTypeSpecType(DeclSpec::TST_error, Loc, PrevSpec, DiagID); 781 DS.SetRangeEnd(Tok.getLocation()); 782 ConsumeToken(); 783 784 // TODO: Could inject an invalid typedef decl in an enclosing scope to 785 // avoid rippling error messages on subsequent uses of the same type, 786 // could be useful if #include was forgotten. 787 return false; 788} 789 790/// \brief Determine the declaration specifier context from the declarator 791/// context. 792/// 793/// \param Context the declarator context, which is one of the 794/// Declarator::TheContext enumerator values. 795Parser::DeclSpecContext 796Parser::getDeclSpecContextFromDeclaratorContext(unsigned Context) { 797 if (Context == Declarator::MemberContext) 798 return DSC_class; 799 if (Context == Declarator::FileContext) 800 return DSC_top_level; 801 return DSC_normal; 802} 803 804/// ParseDeclarationSpecifiers 805/// declaration-specifiers: [C99 6.7] 806/// storage-class-specifier declaration-specifiers[opt] 807/// type-specifier declaration-specifiers[opt] 808/// [C99] function-specifier declaration-specifiers[opt] 809/// [GNU] attributes declaration-specifiers[opt] 810/// 811/// storage-class-specifier: [C99 6.7.1] 812/// 'typedef' 813/// 'extern' 814/// 'static' 815/// 'auto' 816/// 'register' 817/// [C++] 'mutable' 818/// [GNU] '__thread' 819/// function-specifier: [C99 6.7.4] 820/// [C99] 'inline' 821/// [C++] 'virtual' 822/// [C++] 'explicit' 823/// 'friend': [C++ dcl.friend] 824/// 'constexpr': [C++0x dcl.constexpr] 825 826/// 827void Parser::ParseDeclarationSpecifiers(DeclSpec &DS, 828 const ParsedTemplateInfo &TemplateInfo, 829 AccessSpecifier AS, 830 DeclSpecContext DSContext) { 831 if (Tok.is(tok::code_completion)) { 832 Action::CodeCompletionContext CCC = Action::CCC_Namespace; 833 if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) 834 CCC = DSContext == DSC_class? Action::CCC_MemberTemplate 835 : Action::CCC_Template; 836 else if (DSContext == DSC_class) 837 CCC = Action::CCC_Class; 838 else if (ObjCImpDecl) 839 CCC = Action::CCC_ObjCImplementation; 840 841 Actions.CodeCompleteOrdinaryName(CurScope, CCC); 842 ConsumeToken(); 843 } 844 845 DS.SetRangeStart(Tok.getLocation()); 846 while (1) { 847 bool isInvalid = false; 848 const char *PrevSpec = 0; 849 unsigned DiagID = 0; 850 851 SourceLocation Loc = Tok.getLocation(); 852 853 switch (Tok.getKind()) { 854 default: 855 DoneWithDeclSpec: 856 // If this is not a declaration specifier token, we're done reading decl 857 // specifiers. First verify that DeclSpec's are consistent. 858 DS.Finish(Diags, PP); 859 return; 860 861 case tok::coloncolon: // ::foo::bar 862 // C++ scope specifier. Annotate and loop, or bail out on error. 863 if (TryAnnotateCXXScopeToken(true)) { 864 if (!DS.hasTypeSpecifier()) 865 DS.SetTypeSpecError(); 866 goto DoneWithDeclSpec; 867 } 868 if (Tok.is(tok::coloncolon)) // ::new or ::delete 869 goto DoneWithDeclSpec; 870 continue; 871 872 case tok::annot_cxxscope: { 873 if (DS.hasTypeSpecifier()) 874 goto DoneWithDeclSpec; 875 876 CXXScopeSpec SS; 877 SS.setScopeRep(Tok.getAnnotationValue()); 878 SS.setRange(Tok.getAnnotationRange()); 879 880 // We are looking for a qualified typename. 881 Token Next = NextToken(); 882 if (Next.is(tok::annot_template_id) && 883 static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()) 884 ->Kind == TNK_Type_template) { 885 // We have a qualified template-id, e.g., N::A<int> 886 887 // C++ [class.qual]p2: 888 // In a lookup in which the constructor is an acceptable lookup 889 // result and the nested-name-specifier nominates a class C: 890 // 891 // - if the name specified after the 892 // nested-name-specifier, when looked up in C, is the 893 // injected-class-name of C (Clause 9), or 894 // 895 // - if the name specified after the nested-name-specifier 896 // is the same as the identifier or the 897 // simple-template-id's template-name in the last 898 // component of the nested-name-specifier, 899 // 900 // the name is instead considered to name the constructor of 901 // class C. 902 // 903 // Thus, if the template-name is actually the constructor 904 // name, then the code is ill-formed; this interpretation is 905 // reinforced by the NAD status of core issue 635. 906 TemplateIdAnnotation *TemplateId 907 = static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()); 908 if (DSContext == DSC_top_level && TemplateId->Name && 909 Actions.isCurrentClassName(*TemplateId->Name, CurScope, &SS)) { 910 if (isConstructorDeclarator()) { 911 // The user meant this to be an out-of-line constructor 912 // definition, but template arguments are not allowed 913 // there. Just allow this as a constructor; we'll 914 // complain about it later. 915 goto DoneWithDeclSpec; 916 } 917 918 // The user meant this to name a type, but it actually names 919 // a constructor with some extraneous template 920 // arguments. Complain, then parse it as a type as the user 921 // intended. 922 Diag(TemplateId->TemplateNameLoc, 923 diag::err_out_of_line_template_id_names_constructor) 924 << TemplateId->Name; 925 } 926 927 DS.getTypeSpecScope() = SS; 928 ConsumeToken(); // The C++ scope. 929 assert(Tok.is(tok::annot_template_id) && 930 "ParseOptionalCXXScopeSpecifier not working"); 931 AnnotateTemplateIdTokenAsType(&SS); 932 continue; 933 } 934 935 if (Next.is(tok::annot_typename)) { 936 DS.getTypeSpecScope() = SS; 937 ConsumeToken(); // The C++ scope. 938 if (Tok.getAnnotationValue()) 939 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, 940 PrevSpec, DiagID, 941 Tok.getAnnotationValue()); 942 else 943 DS.SetTypeSpecError(); 944 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 945 ConsumeToken(); // The typename 946 } 947 948 if (Next.isNot(tok::identifier)) 949 goto DoneWithDeclSpec; 950 951 // If we're in a context where the identifier could be a class name, 952 // check whether this is a constructor declaration. 953 if (DSContext == DSC_top_level && 954 Actions.isCurrentClassName(*Next.getIdentifierInfo(), CurScope, 955 &SS)) { 956 if (isConstructorDeclarator()) 957 goto DoneWithDeclSpec; 958 959 // As noted in C++ [class.qual]p2 (cited above), when the name 960 // of the class is qualified in a context where it could name 961 // a constructor, its a constructor name. However, we've 962 // looked at the declarator, and the user probably meant this 963 // to be a type. Complain that it isn't supposed to be treated 964 // as a type, then proceed to parse it as a type. 965 Diag(Next.getLocation(), diag::err_out_of_line_type_names_constructor) 966 << Next.getIdentifierInfo(); 967 } 968 969 TypeTy *TypeRep = Actions.getTypeName(*Next.getIdentifierInfo(), 970 Next.getLocation(), CurScope, &SS); 971 972 // If the referenced identifier is not a type, then this declspec is 973 // erroneous: We already checked about that it has no type specifier, and 974 // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the 975 // typename. 976 if (TypeRep == 0) { 977 ConsumeToken(); // Eat the scope spec so the identifier is current. 978 if (ParseImplicitInt(DS, &SS, TemplateInfo, AS)) continue; 979 goto DoneWithDeclSpec; 980 } 981 982 DS.getTypeSpecScope() = SS; 983 ConsumeToken(); // The C++ scope. 984 985 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 986 DiagID, TypeRep); 987 if (isInvalid) 988 break; 989 990 DS.SetRangeEnd(Tok.getLocation()); 991 ConsumeToken(); // The typename. 992 993 continue; 994 } 995 996 case tok::annot_typename: { 997 if (Tok.getAnnotationValue()) 998 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 999 DiagID, Tok.getAnnotationValue()); 1000 else 1001 DS.SetTypeSpecError(); 1002 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 1003 ConsumeToken(); // The typename 1004 1005 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1006 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1007 // Objective-C interface. If we don't have Objective-C or a '<', this is 1008 // just a normal reference to a typedef name. 1009 if (!Tok.is(tok::less) || !getLang().ObjC1) 1010 continue; 1011 1012 SourceLocation LAngleLoc, EndProtoLoc; 1013 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1014 llvm::SmallVector<SourceLocation, 8> ProtocolLocs; 1015 ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false, 1016 LAngleLoc, EndProtoLoc); 1017 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(), 1018 ProtocolLocs.data(), LAngleLoc); 1019 1020 DS.SetRangeEnd(EndProtoLoc); 1021 continue; 1022 } 1023 1024 // typedef-name 1025 case tok::identifier: { 1026 // In C++, check to see if this is a scope specifier like foo::bar::, if 1027 // so handle it as such. This is important for ctor parsing. 1028 if (getLang().CPlusPlus) { 1029 if (TryAnnotateCXXScopeToken(true)) { 1030 if (!DS.hasTypeSpecifier()) 1031 DS.SetTypeSpecError(); 1032 goto DoneWithDeclSpec; 1033 } 1034 if (!Tok.is(tok::identifier)) 1035 continue; 1036 } 1037 1038 // This identifier can only be a typedef name if we haven't already seen 1039 // a type-specifier. Without this check we misparse: 1040 // typedef int X; struct Y { short X; }; as 'short int'. 1041 if (DS.hasTypeSpecifier()) 1042 goto DoneWithDeclSpec; 1043 1044 // Check for need to substitute AltiVec keyword tokens. 1045 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid)) 1046 break; 1047 1048 // It has to be available as a typedef too! 1049 TypeTy *TypeRep = Actions.getTypeName(*Tok.getIdentifierInfo(), 1050 Tok.getLocation(), CurScope); 1051 1052 // If this is not a typedef name, don't parse it as part of the declspec, 1053 // it must be an implicit int or an error. 1054 if (TypeRep == 0) { 1055 if (ParseImplicitInt(DS, 0, TemplateInfo, AS)) continue; 1056 goto DoneWithDeclSpec; 1057 } 1058 1059 // If we're in a context where the identifier could be a class name, 1060 // check whether this is a constructor declaration. 1061 if (getLang().CPlusPlus && DSContext == DSC_class && 1062 Actions.isCurrentClassName(*Tok.getIdentifierInfo(), CurScope) && 1063 isConstructorDeclarator()) 1064 goto DoneWithDeclSpec; 1065 1066 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1067 DiagID, TypeRep); 1068 if (isInvalid) 1069 break; 1070 1071 DS.SetRangeEnd(Tok.getLocation()); 1072 ConsumeToken(); // The identifier 1073 1074 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1075 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1076 // Objective-C interface. If we don't have Objective-C or a '<', this is 1077 // just a normal reference to a typedef name. 1078 if (!Tok.is(tok::less) || !getLang().ObjC1) 1079 continue; 1080 1081 SourceLocation LAngleLoc, EndProtoLoc; 1082 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1083 llvm::SmallVector<SourceLocation, 8> ProtocolLocs; 1084 ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false, 1085 LAngleLoc, EndProtoLoc); 1086 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(), 1087 ProtocolLocs.data(), LAngleLoc); 1088 1089 DS.SetRangeEnd(EndProtoLoc); 1090 1091 // Need to support trailing type qualifiers (e.g. "id<p> const"). 1092 // If a type specifier follows, it will be diagnosed elsewhere. 1093 continue; 1094 } 1095 1096 // type-name 1097 case tok::annot_template_id: { 1098 TemplateIdAnnotation *TemplateId 1099 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 1100 if (TemplateId->Kind != TNK_Type_template) { 1101 // This template-id does not refer to a type name, so we're 1102 // done with the type-specifiers. 1103 goto DoneWithDeclSpec; 1104 } 1105 1106 // If we're in a context where the template-id could be a 1107 // constructor name or specialization, check whether this is a 1108 // constructor declaration. 1109 if (getLang().CPlusPlus && DSContext == DSC_class && 1110 Actions.isCurrentClassName(*TemplateId->Name, CurScope) && 1111 isConstructorDeclarator()) 1112 goto DoneWithDeclSpec; 1113 1114 // Turn the template-id annotation token into a type annotation 1115 // token, then try again to parse it as a type-specifier. 1116 AnnotateTemplateIdTokenAsType(); 1117 continue; 1118 } 1119 1120 // GNU attributes support. 1121 case tok::kw___attribute: 1122 DS.AddAttributes(ParseGNUAttributes()); 1123 continue; 1124 1125 // Microsoft declspec support. 1126 case tok::kw___declspec: 1127 DS.AddAttributes(ParseMicrosoftDeclSpec()); 1128 continue; 1129 1130 // Microsoft single token adornments. 1131 case tok::kw___forceinline: 1132 // FIXME: Add handling here! 1133 break; 1134 1135 case tok::kw___ptr64: 1136 case tok::kw___w64: 1137 case tok::kw___cdecl: 1138 case tok::kw___stdcall: 1139 case tok::kw___fastcall: 1140 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 1141 continue; 1142 1143 // storage-class-specifier 1144 case tok::kw_typedef: 1145 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_typedef, Loc, PrevSpec, 1146 DiagID); 1147 break; 1148 case tok::kw_extern: 1149 if (DS.isThreadSpecified()) 1150 Diag(Tok, diag::ext_thread_before) << "extern"; 1151 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_extern, Loc, PrevSpec, 1152 DiagID); 1153 break; 1154 case tok::kw___private_extern__: 1155 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_private_extern, Loc, 1156 PrevSpec, DiagID); 1157 break; 1158 case tok::kw_static: 1159 if (DS.isThreadSpecified()) 1160 Diag(Tok, diag::ext_thread_before) << "static"; 1161 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_static, Loc, PrevSpec, 1162 DiagID); 1163 break; 1164 case tok::kw_auto: 1165 if (getLang().CPlusPlus0x) 1166 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, 1167 DiagID); 1168 else 1169 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_auto, Loc, PrevSpec, 1170 DiagID); 1171 break; 1172 case tok::kw_register: 1173 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_register, Loc, PrevSpec, 1174 DiagID); 1175 break; 1176 case tok::kw_mutable: 1177 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_mutable, Loc, PrevSpec, 1178 DiagID); 1179 break; 1180 case tok::kw___thread: 1181 isInvalid = DS.SetStorageClassSpecThread(Loc, PrevSpec, DiagID); 1182 break; 1183 1184 // function-specifier 1185 case tok::kw_inline: 1186 isInvalid = DS.SetFunctionSpecInline(Loc, PrevSpec, DiagID); 1187 break; 1188 case tok::kw_virtual: 1189 isInvalid = DS.SetFunctionSpecVirtual(Loc, PrevSpec, DiagID); 1190 break; 1191 case tok::kw_explicit: 1192 isInvalid = DS.SetFunctionSpecExplicit(Loc, PrevSpec, DiagID); 1193 break; 1194 1195 // friend 1196 case tok::kw_friend: 1197 if (DSContext == DSC_class) 1198 isInvalid = DS.SetFriendSpec(Loc, PrevSpec, DiagID); 1199 else { 1200 PrevSpec = ""; // not actually used by the diagnostic 1201 DiagID = diag::err_friend_invalid_in_context; 1202 isInvalid = true; 1203 } 1204 break; 1205 1206 // constexpr 1207 case tok::kw_constexpr: 1208 isInvalid = DS.SetConstexprSpec(Loc, PrevSpec, DiagID); 1209 break; 1210 1211 // type-specifier 1212 case tok::kw_short: 1213 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, 1214 DiagID); 1215 break; 1216 case tok::kw_long: 1217 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long) 1218 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, 1219 DiagID); 1220 else 1221 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 1222 DiagID); 1223 break; 1224 case tok::kw_signed: 1225 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, 1226 DiagID); 1227 break; 1228 case tok::kw_unsigned: 1229 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, 1230 DiagID); 1231 break; 1232 case tok::kw__Complex: 1233 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec, 1234 DiagID); 1235 break; 1236 case tok::kw__Imaginary: 1237 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec, 1238 DiagID); 1239 break; 1240 case tok::kw_void: 1241 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, 1242 DiagID); 1243 break; 1244 case tok::kw_char: 1245 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, 1246 DiagID); 1247 break; 1248 case tok::kw_int: 1249 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, 1250 DiagID); 1251 break; 1252 case tok::kw_float: 1253 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, 1254 DiagID); 1255 break; 1256 case tok::kw_double: 1257 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, 1258 DiagID); 1259 break; 1260 case tok::kw_wchar_t: 1261 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, 1262 DiagID); 1263 break; 1264 case tok::kw_char16_t: 1265 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, 1266 DiagID); 1267 break; 1268 case tok::kw_char32_t: 1269 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, 1270 DiagID); 1271 break; 1272 case tok::kw_bool: 1273 case tok::kw__Bool: 1274 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, 1275 DiagID); 1276 break; 1277 case tok::kw__Decimal32: 1278 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec, 1279 DiagID); 1280 break; 1281 case tok::kw__Decimal64: 1282 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec, 1283 DiagID); 1284 break; 1285 case tok::kw__Decimal128: 1286 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec, 1287 DiagID); 1288 break; 1289 case tok::kw___vector: 1290 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 1291 break; 1292 case tok::kw___pixel: 1293 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID); 1294 break; 1295 1296 // class-specifier: 1297 case tok::kw_class: 1298 case tok::kw_struct: 1299 case tok::kw_union: { 1300 tok::TokenKind Kind = Tok.getKind(); 1301 ConsumeToken(); 1302 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS); 1303 continue; 1304 } 1305 1306 // enum-specifier: 1307 case tok::kw_enum: 1308 ConsumeToken(); 1309 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS); 1310 continue; 1311 1312 // cv-qualifier: 1313 case tok::kw_const: 1314 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec, DiagID, 1315 getLang()); 1316 break; 1317 case tok::kw_volatile: 1318 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID, 1319 getLang()); 1320 break; 1321 case tok::kw_restrict: 1322 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID, 1323 getLang()); 1324 break; 1325 1326 // C++ typename-specifier: 1327 case tok::kw_typename: 1328 if (TryAnnotateTypeOrScopeToken()) { 1329 DS.SetTypeSpecError(); 1330 goto DoneWithDeclSpec; 1331 } 1332 if (!Tok.is(tok::kw_typename)) 1333 continue; 1334 break; 1335 1336 // GNU typeof support. 1337 case tok::kw_typeof: 1338 ParseTypeofSpecifier(DS); 1339 continue; 1340 1341 case tok::kw_decltype: 1342 ParseDecltypeSpecifier(DS); 1343 continue; 1344 1345 case tok::less: 1346 // GCC ObjC supports types like "<SomeProtocol>" as a synonym for 1347 // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous, 1348 // but we support it. 1349 if (DS.hasTypeSpecifier() || !getLang().ObjC1) 1350 goto DoneWithDeclSpec; 1351 1352 { 1353 SourceLocation LAngleLoc, EndProtoLoc; 1354 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1355 llvm::SmallVector<SourceLocation, 8> ProtocolLocs; 1356 ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false, 1357 LAngleLoc, EndProtoLoc); 1358 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(), 1359 ProtocolLocs.data(), LAngleLoc); 1360 DS.SetRangeEnd(EndProtoLoc); 1361 1362 Diag(Loc, diag::warn_objc_protocol_qualifier_missing_id) 1363 << CodeModificationHint::CreateInsertion(Loc, "id") 1364 << SourceRange(Loc, EndProtoLoc); 1365 // Need to support trailing type qualifiers (e.g. "id<p> const"). 1366 // If a type specifier follows, it will be diagnosed elsewhere. 1367 continue; 1368 } 1369 } 1370 // If the specifier wasn't legal, issue a diagnostic. 1371 if (isInvalid) { 1372 assert(PrevSpec && "Method did not return previous specifier!"); 1373 assert(DiagID); 1374 Diag(Tok, DiagID) << PrevSpec; 1375 } 1376 DS.SetRangeEnd(Tok.getLocation()); 1377 ConsumeToken(); 1378 } 1379} 1380 1381/// ParseOptionalTypeSpecifier - Try to parse a single type-specifier. We 1382/// primarily follow the C++ grammar with additions for C99 and GNU, 1383/// which together subsume the C grammar. Note that the C++ 1384/// type-specifier also includes the C type-qualifier (for const, 1385/// volatile, and C99 restrict). Returns true if a type-specifier was 1386/// found (and parsed), false otherwise. 1387/// 1388/// type-specifier: [C++ 7.1.5] 1389/// simple-type-specifier 1390/// class-specifier 1391/// enum-specifier 1392/// elaborated-type-specifier [TODO] 1393/// cv-qualifier 1394/// 1395/// cv-qualifier: [C++ 7.1.5.1] 1396/// 'const' 1397/// 'volatile' 1398/// [C99] 'restrict' 1399/// 1400/// simple-type-specifier: [ C++ 7.1.5.2] 1401/// '::'[opt] nested-name-specifier[opt] type-name [TODO] 1402/// '::'[opt] nested-name-specifier 'template' template-id [TODO] 1403/// 'char' 1404/// 'wchar_t' 1405/// 'bool' 1406/// 'short' 1407/// 'int' 1408/// 'long' 1409/// 'signed' 1410/// 'unsigned' 1411/// 'float' 1412/// 'double' 1413/// 'void' 1414/// [C99] '_Bool' 1415/// [C99] '_Complex' 1416/// [C99] '_Imaginary' // Removed in TC2? 1417/// [GNU] '_Decimal32' 1418/// [GNU] '_Decimal64' 1419/// [GNU] '_Decimal128' 1420/// [GNU] typeof-specifier 1421/// [OBJC] class-name objc-protocol-refs[opt] [TODO] 1422/// [OBJC] typedef-name objc-protocol-refs[opt] [TODO] 1423/// [C++0x] 'decltype' ( expression ) 1424/// [AltiVec] '__vector' 1425bool Parser::ParseOptionalTypeSpecifier(DeclSpec &DS, bool& isInvalid, 1426 const char *&PrevSpec, 1427 unsigned &DiagID, 1428 const ParsedTemplateInfo &TemplateInfo, 1429 bool SuppressDeclarations) { 1430 SourceLocation Loc = Tok.getLocation(); 1431 1432 switch (Tok.getKind()) { 1433 case tok::identifier: // foo::bar 1434 // Check for need to substitute AltiVec keyword tokens. 1435 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid)) 1436 break; 1437 // Fall through. 1438 case tok::kw_typename: // typename foo::bar 1439 // Annotate typenames and C++ scope specifiers. If we get one, just 1440 // recurse to handle whatever we get. 1441 if (TryAnnotateTypeOrScopeToken()) 1442 return true; 1443 if (Tok.is(tok::identifier)) 1444 return false; 1445 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID, 1446 TemplateInfo, SuppressDeclarations); 1447 case tok::coloncolon: // ::foo::bar 1448 if (NextToken().is(tok::kw_new) || // ::new 1449 NextToken().is(tok::kw_delete)) // ::delete 1450 return false; 1451 1452 // Annotate typenames and C++ scope specifiers. If we get one, just 1453 // recurse to handle whatever we get. 1454 if (TryAnnotateTypeOrScopeToken()) 1455 return true; 1456 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID, 1457 TemplateInfo, SuppressDeclarations); 1458 1459 // simple-type-specifier: 1460 case tok::annot_typename: { 1461 if (Tok.getAnnotationValue()) 1462 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1463 DiagID, Tok.getAnnotationValue()); 1464 else 1465 DS.SetTypeSpecError(); 1466 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 1467 ConsumeToken(); // The typename 1468 1469 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1470 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1471 // Objective-C interface. If we don't have Objective-C or a '<', this is 1472 // just a normal reference to a typedef name. 1473 if (!Tok.is(tok::less) || !getLang().ObjC1) 1474 return true; 1475 1476 SourceLocation LAngleLoc, EndProtoLoc; 1477 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1478 llvm::SmallVector<SourceLocation, 8> ProtocolLocs; 1479 ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false, 1480 LAngleLoc, EndProtoLoc); 1481 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(), 1482 ProtocolLocs.data(), LAngleLoc); 1483 1484 DS.SetRangeEnd(EndProtoLoc); 1485 return true; 1486 } 1487 1488 case tok::kw_short: 1489 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, DiagID); 1490 break; 1491 case tok::kw_long: 1492 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long) 1493 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, 1494 DiagID); 1495 else 1496 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 1497 DiagID); 1498 break; 1499 case tok::kw_signed: 1500 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, DiagID); 1501 break; 1502 case tok::kw_unsigned: 1503 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, 1504 DiagID); 1505 break; 1506 case tok::kw__Complex: 1507 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec, 1508 DiagID); 1509 break; 1510 case tok::kw__Imaginary: 1511 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec, 1512 DiagID); 1513 break; 1514 case tok::kw_void: 1515 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, DiagID); 1516 break; 1517 case tok::kw_char: 1518 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, DiagID); 1519 break; 1520 case tok::kw_int: 1521 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, DiagID); 1522 break; 1523 case tok::kw_float: 1524 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, DiagID); 1525 break; 1526 case tok::kw_double: 1527 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, DiagID); 1528 break; 1529 case tok::kw_wchar_t: 1530 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, DiagID); 1531 break; 1532 case tok::kw_char16_t: 1533 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, DiagID); 1534 break; 1535 case tok::kw_char32_t: 1536 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, DiagID); 1537 break; 1538 case tok::kw_bool: 1539 case tok::kw__Bool: 1540 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, DiagID); 1541 break; 1542 case tok::kw__Decimal32: 1543 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec, 1544 DiagID); 1545 break; 1546 case tok::kw__Decimal64: 1547 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec, 1548 DiagID); 1549 break; 1550 case tok::kw__Decimal128: 1551 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec, 1552 DiagID); 1553 break; 1554 case tok::kw___vector: 1555 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 1556 break; 1557 case tok::kw___pixel: 1558 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID); 1559 break; 1560 1561 // class-specifier: 1562 case tok::kw_class: 1563 case tok::kw_struct: 1564 case tok::kw_union: { 1565 tok::TokenKind Kind = Tok.getKind(); 1566 ConsumeToken(); 1567 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS_none, 1568 SuppressDeclarations); 1569 return true; 1570 } 1571 1572 // enum-specifier: 1573 case tok::kw_enum: 1574 ConsumeToken(); 1575 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS_none); 1576 return true; 1577 1578 // cv-qualifier: 1579 case tok::kw_const: 1580 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, 1581 DiagID, getLang()); 1582 break; 1583 case tok::kw_volatile: 1584 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, 1585 DiagID, getLang()); 1586 break; 1587 case tok::kw_restrict: 1588 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, 1589 DiagID, getLang()); 1590 break; 1591 1592 // GNU typeof support. 1593 case tok::kw_typeof: 1594 ParseTypeofSpecifier(DS); 1595 return true; 1596 1597 // C++0x decltype support. 1598 case tok::kw_decltype: 1599 ParseDecltypeSpecifier(DS); 1600 return true; 1601 1602 // C++0x auto support. 1603 case tok::kw_auto: 1604 if (!getLang().CPlusPlus0x) 1605 return false; 1606 1607 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, DiagID); 1608 break; 1609 case tok::kw___ptr64: 1610 case tok::kw___w64: 1611 case tok::kw___cdecl: 1612 case tok::kw___stdcall: 1613 case tok::kw___fastcall: 1614 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 1615 return true; 1616 1617 default: 1618 // Not a type-specifier; do nothing. 1619 return false; 1620 } 1621 1622 // If the specifier combination wasn't legal, issue a diagnostic. 1623 if (isInvalid) { 1624 assert(PrevSpec && "Method did not return previous specifier!"); 1625 // Pick between error or extwarn. 1626 Diag(Tok, DiagID) << PrevSpec; 1627 } 1628 DS.SetRangeEnd(Tok.getLocation()); 1629 ConsumeToken(); // whatever we parsed above. 1630 return true; 1631} 1632 1633/// ParseStructDeclaration - Parse a struct declaration without the terminating 1634/// semicolon. 1635/// 1636/// struct-declaration: 1637/// specifier-qualifier-list struct-declarator-list 1638/// [GNU] __extension__ struct-declaration 1639/// [GNU] specifier-qualifier-list 1640/// struct-declarator-list: 1641/// struct-declarator 1642/// struct-declarator-list ',' struct-declarator 1643/// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator 1644/// struct-declarator: 1645/// declarator 1646/// [GNU] declarator attributes[opt] 1647/// declarator[opt] ':' constant-expression 1648/// [GNU] declarator[opt] ':' constant-expression attributes[opt] 1649/// 1650void Parser:: 1651ParseStructDeclaration(DeclSpec &DS, FieldCallback &Fields) { 1652 if (Tok.is(tok::kw___extension__)) { 1653 // __extension__ silences extension warnings in the subexpression. 1654 ExtensionRAIIObject O(Diags); // Use RAII to do this. 1655 ConsumeToken(); 1656 return ParseStructDeclaration(DS, Fields); 1657 } 1658 1659 // Parse the common specifier-qualifiers-list piece. 1660 SourceLocation DSStart = Tok.getLocation(); 1661 ParseSpecifierQualifierList(DS); 1662 1663 // If there are no declarators, this is a free-standing declaration 1664 // specifier. Let the actions module cope with it. 1665 if (Tok.is(tok::semi)) { 1666 Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 1667 return; 1668 } 1669 1670 // Read struct-declarators until we find the semicolon. 1671 bool FirstDeclarator = true; 1672 while (1) { 1673 ParsingDeclRAIIObject PD(*this); 1674 FieldDeclarator DeclaratorInfo(DS); 1675 1676 // Attributes are only allowed here on successive declarators. 1677 if (!FirstDeclarator && Tok.is(tok::kw___attribute)) { 1678 SourceLocation Loc; 1679 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1680 DeclaratorInfo.D.AddAttributes(AttrList, Loc); 1681 } 1682 1683 /// struct-declarator: declarator 1684 /// struct-declarator: declarator[opt] ':' constant-expression 1685 if (Tok.isNot(tok::colon)) { 1686 // Don't parse FOO:BAR as if it were a typo for FOO::BAR. 1687 ColonProtectionRAIIObject X(*this); 1688 ParseDeclarator(DeclaratorInfo.D); 1689 } 1690 1691 if (Tok.is(tok::colon)) { 1692 ConsumeToken(); 1693 OwningExprResult Res(ParseConstantExpression()); 1694 if (Res.isInvalid()) 1695 SkipUntil(tok::semi, true, true); 1696 else 1697 DeclaratorInfo.BitfieldSize = Res.release(); 1698 } 1699 1700 // If attributes exist after the declarator, parse them. 1701 if (Tok.is(tok::kw___attribute)) { 1702 SourceLocation Loc; 1703 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1704 DeclaratorInfo.D.AddAttributes(AttrList, Loc); 1705 } 1706 1707 // We're done with this declarator; invoke the callback. 1708 DeclPtrTy D = Fields.invoke(DeclaratorInfo); 1709 PD.complete(D); 1710 1711 // If we don't have a comma, it is either the end of the list (a ';') 1712 // or an error, bail out. 1713 if (Tok.isNot(tok::comma)) 1714 return; 1715 1716 // Consume the comma. 1717 ConsumeToken(); 1718 1719 FirstDeclarator = false; 1720 } 1721} 1722 1723/// ParseStructUnionBody 1724/// struct-contents: 1725/// struct-declaration-list 1726/// [EXT] empty 1727/// [GNU] "struct-declaration-list" without terminatoring ';' 1728/// struct-declaration-list: 1729/// struct-declaration 1730/// struct-declaration-list struct-declaration 1731/// [OBC] '@' 'defs' '(' class-name ')' 1732/// 1733void Parser::ParseStructUnionBody(SourceLocation RecordLoc, 1734 unsigned TagType, DeclPtrTy TagDecl) { 1735 PrettyStackTraceActionsDecl CrashInfo(TagDecl, RecordLoc, Actions, 1736 PP.getSourceManager(), 1737 "parsing struct/union body"); 1738 1739 SourceLocation LBraceLoc = ConsumeBrace(); 1740 1741 ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope); 1742 Actions.ActOnTagStartDefinition(CurScope, TagDecl); 1743 1744 // Empty structs are an extension in C (C99 6.7.2.1p7), but are allowed in 1745 // C++. 1746 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus) 1747 Diag(Tok, diag::ext_empty_struct_union_enum) 1748 << DeclSpec::getSpecifierName((DeclSpec::TST)TagType); 1749 1750 llvm::SmallVector<DeclPtrTy, 32> FieldDecls; 1751 1752 // While we still have something to read, read the declarations in the struct. 1753 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 1754 // Each iteration of this loop reads one struct-declaration. 1755 1756 // Check for extraneous top-level semicolon. 1757 if (Tok.is(tok::semi)) { 1758 Diag(Tok, diag::ext_extra_struct_semi) 1759 << CodeModificationHint::CreateRemoval(Tok.getLocation()); 1760 ConsumeToken(); 1761 continue; 1762 } 1763 1764 // Parse all the comma separated declarators. 1765 DeclSpec DS; 1766 1767 if (!Tok.is(tok::at)) { 1768 struct CFieldCallback : FieldCallback { 1769 Parser &P; 1770 DeclPtrTy TagDecl; 1771 llvm::SmallVectorImpl<DeclPtrTy> &FieldDecls; 1772 1773 CFieldCallback(Parser &P, DeclPtrTy TagDecl, 1774 llvm::SmallVectorImpl<DeclPtrTy> &FieldDecls) : 1775 P(P), TagDecl(TagDecl), FieldDecls(FieldDecls) {} 1776 1777 virtual DeclPtrTy invoke(FieldDeclarator &FD) { 1778 // Install the declarator into the current TagDecl. 1779 DeclPtrTy Field = P.Actions.ActOnField(P.CurScope, TagDecl, 1780 FD.D.getDeclSpec().getSourceRange().getBegin(), 1781 FD.D, FD.BitfieldSize); 1782 FieldDecls.push_back(Field); 1783 return Field; 1784 } 1785 } Callback(*this, TagDecl, FieldDecls); 1786 1787 ParseStructDeclaration(DS, Callback); 1788 } else { // Handle @defs 1789 ConsumeToken(); 1790 if (!Tok.isObjCAtKeyword(tok::objc_defs)) { 1791 Diag(Tok, diag::err_unexpected_at); 1792 SkipUntil(tok::semi, true); 1793 continue; 1794 } 1795 ConsumeToken(); 1796 ExpectAndConsume(tok::l_paren, diag::err_expected_lparen); 1797 if (!Tok.is(tok::identifier)) { 1798 Diag(Tok, diag::err_expected_ident); 1799 SkipUntil(tok::semi, true); 1800 continue; 1801 } 1802 llvm::SmallVector<DeclPtrTy, 16> Fields; 1803 Actions.ActOnDefs(CurScope, TagDecl, Tok.getLocation(), 1804 Tok.getIdentifierInfo(), Fields); 1805 FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end()); 1806 ConsumeToken(); 1807 ExpectAndConsume(tok::r_paren, diag::err_expected_rparen); 1808 } 1809 1810 if (Tok.is(tok::semi)) { 1811 ConsumeToken(); 1812 } else if (Tok.is(tok::r_brace)) { 1813 ExpectAndConsume(tok::semi, diag::ext_expected_semi_decl_list); 1814 break; 1815 } else { 1816 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list); 1817 // Skip to end of block or statement to avoid ext-warning on extra ';'. 1818 SkipUntil(tok::r_brace, true, true); 1819 // If we stopped at a ';', eat it. 1820 if (Tok.is(tok::semi)) ConsumeToken(); 1821 } 1822 } 1823 1824 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 1825 1826 llvm::OwningPtr<AttributeList> AttrList; 1827 // If attributes exist after struct contents, parse them. 1828 if (Tok.is(tok::kw___attribute)) 1829 AttrList.reset(ParseGNUAttributes()); 1830 1831 Actions.ActOnFields(CurScope, 1832 RecordLoc, TagDecl, FieldDecls.data(), FieldDecls.size(), 1833 LBraceLoc, RBraceLoc, 1834 AttrList.get()); 1835 StructScope.Exit(); 1836 Actions.ActOnTagFinishDefinition(CurScope, TagDecl, RBraceLoc); 1837} 1838 1839 1840/// ParseEnumSpecifier 1841/// enum-specifier: [C99 6.7.2.2] 1842/// 'enum' identifier[opt] '{' enumerator-list '}' 1843///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}' 1844/// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt] 1845/// '}' attributes[opt] 1846/// 'enum' identifier 1847/// [GNU] 'enum' attributes[opt] identifier 1848/// 1849/// [C++] elaborated-type-specifier: 1850/// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier 1851/// 1852void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS, 1853 const ParsedTemplateInfo &TemplateInfo, 1854 AccessSpecifier AS) { 1855 // Parse the tag portion of this. 1856 if (Tok.is(tok::code_completion)) { 1857 // Code completion for an enum name. 1858 Actions.CodeCompleteTag(CurScope, DeclSpec::TST_enum); 1859 ConsumeToken(); 1860 } 1861 1862 llvm::OwningPtr<AttributeList> Attr; 1863 // If attributes exist after tag, parse them. 1864 if (Tok.is(tok::kw___attribute)) 1865 Attr.reset(ParseGNUAttributes()); 1866 1867 CXXScopeSpec SS; 1868 if (getLang().CPlusPlus) { 1869 if (ParseOptionalCXXScopeSpecifier(SS, 0, false)) 1870 return; 1871 1872 if (SS.isSet() && Tok.isNot(tok::identifier)) { 1873 Diag(Tok, diag::err_expected_ident); 1874 if (Tok.isNot(tok::l_brace)) { 1875 // Has no name and is not a definition. 1876 // Skip the rest of this declarator, up until the comma or semicolon. 1877 SkipUntil(tok::comma, true); 1878 return; 1879 } 1880 } 1881 } 1882 1883 // Must have either 'enum name' or 'enum {...}'. 1884 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace)) { 1885 Diag(Tok, diag::err_expected_ident_lbrace); 1886 1887 // Skip the rest of this declarator, up until the comma or semicolon. 1888 SkipUntil(tok::comma, true); 1889 return; 1890 } 1891 1892 // enums cannot be templates. 1893 if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) { 1894 Diag(Tok, diag::err_enum_template); 1895 1896 // Skip the rest of this declarator, up until the comma or semicolon. 1897 SkipUntil(tok::comma, true); 1898 return; 1899 } 1900 1901 // If an identifier is present, consume and remember it. 1902 IdentifierInfo *Name = 0; 1903 SourceLocation NameLoc; 1904 if (Tok.is(tok::identifier)) { 1905 Name = Tok.getIdentifierInfo(); 1906 NameLoc = ConsumeToken(); 1907 } 1908 1909 // There are three options here. If we have 'enum foo;', then this is a 1910 // forward declaration. If we have 'enum foo {...' then this is a 1911 // definition. Otherwise we have something like 'enum foo xyz', a reference. 1912 // 1913 // This is needed to handle stuff like this right (C99 6.7.2.3p11): 1914 // enum foo {..}; void bar() { enum foo; } <- new foo in bar. 1915 // enum foo {..}; void bar() { enum foo x; } <- use of old foo. 1916 // 1917 Action::TagUseKind TUK; 1918 if (Tok.is(tok::l_brace)) 1919 TUK = Action::TUK_Definition; 1920 else if (Tok.is(tok::semi)) 1921 TUK = Action::TUK_Declaration; 1922 else 1923 TUK = Action::TUK_Reference; 1924 bool Owned = false; 1925 bool IsDependent = false; 1926 DeclPtrTy TagDecl = Actions.ActOnTag(CurScope, DeclSpec::TST_enum, TUK, 1927 StartLoc, SS, Name, NameLoc, Attr.get(), 1928 AS, 1929 Action::MultiTemplateParamsArg(Actions), 1930 Owned, IsDependent); 1931 assert(!IsDependent && "didn't expect dependent enum"); 1932 1933 if (Tok.is(tok::l_brace)) 1934 ParseEnumBody(StartLoc, TagDecl); 1935 1936 // FIXME: The DeclSpec should keep the locations of both the keyword and the 1937 // name (if there is one). 1938 SourceLocation TSTLoc = NameLoc.isValid()? NameLoc : StartLoc; 1939 const char *PrevSpec = 0; 1940 unsigned DiagID; 1941 if (DS.SetTypeSpecType(DeclSpec::TST_enum, TSTLoc, PrevSpec, DiagID, 1942 TagDecl.getAs<void>(), Owned)) 1943 Diag(StartLoc, DiagID) << PrevSpec; 1944} 1945 1946/// ParseEnumBody - Parse a {} enclosed enumerator-list. 1947/// enumerator-list: 1948/// enumerator 1949/// enumerator-list ',' enumerator 1950/// enumerator: 1951/// enumeration-constant 1952/// enumeration-constant '=' constant-expression 1953/// enumeration-constant: 1954/// identifier 1955/// 1956void Parser::ParseEnumBody(SourceLocation StartLoc, DeclPtrTy EnumDecl) { 1957 // Enter the scope of the enum body and start the definition. 1958 ParseScope EnumScope(this, Scope::DeclScope); 1959 Actions.ActOnTagStartDefinition(CurScope, EnumDecl); 1960 1961 SourceLocation LBraceLoc = ConsumeBrace(); 1962 1963 // C does not allow an empty enumerator-list, C++ does [dcl.enum]. 1964 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus) 1965 Diag(Tok, diag::ext_empty_struct_union_enum) << "enum"; 1966 1967 llvm::SmallVector<DeclPtrTy, 32> EnumConstantDecls; 1968 1969 DeclPtrTy LastEnumConstDecl; 1970 1971 // Parse the enumerator-list. 1972 while (Tok.is(tok::identifier)) { 1973 IdentifierInfo *Ident = Tok.getIdentifierInfo(); 1974 SourceLocation IdentLoc = ConsumeToken(); 1975 1976 SourceLocation EqualLoc; 1977 OwningExprResult AssignedVal(Actions); 1978 if (Tok.is(tok::equal)) { 1979 EqualLoc = ConsumeToken(); 1980 AssignedVal = ParseConstantExpression(); 1981 if (AssignedVal.isInvalid()) 1982 SkipUntil(tok::comma, tok::r_brace, true, true); 1983 } 1984 1985 // Install the enumerator constant into EnumDecl. 1986 DeclPtrTy EnumConstDecl = Actions.ActOnEnumConstant(CurScope, EnumDecl, 1987 LastEnumConstDecl, 1988 IdentLoc, Ident, 1989 EqualLoc, 1990 AssignedVal.release()); 1991 EnumConstantDecls.push_back(EnumConstDecl); 1992 LastEnumConstDecl = EnumConstDecl; 1993 1994 if (Tok.isNot(tok::comma)) 1995 break; 1996 SourceLocation CommaLoc = ConsumeToken(); 1997 1998 if (Tok.isNot(tok::identifier) && 1999 !(getLang().C99 || getLang().CPlusPlus0x)) 2000 Diag(CommaLoc, diag::ext_enumerator_list_comma) 2001 << getLang().CPlusPlus 2002 << CodeModificationHint::CreateRemoval(CommaLoc); 2003 } 2004 2005 // Eat the }. 2006 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 2007 2008 llvm::OwningPtr<AttributeList> Attr; 2009 // If attributes exist after the identifier list, parse them. 2010 if (Tok.is(tok::kw___attribute)) 2011 Attr.reset(ParseGNUAttributes()); // FIXME: where do they do? 2012 2013 Actions.ActOnEnumBody(StartLoc, LBraceLoc, RBraceLoc, EnumDecl, 2014 EnumConstantDecls.data(), EnumConstantDecls.size(), 2015 CurScope, Attr.get()); 2016 2017 EnumScope.Exit(); 2018 Actions.ActOnTagFinishDefinition(CurScope, EnumDecl, RBraceLoc); 2019} 2020 2021/// isTypeSpecifierQualifier - Return true if the current token could be the 2022/// start of a type-qualifier-list. 2023bool Parser::isTypeQualifier() const { 2024 switch (Tok.getKind()) { 2025 default: return false; 2026 // type-qualifier 2027 case tok::kw_const: 2028 case tok::kw_volatile: 2029 case tok::kw_restrict: 2030 return true; 2031 } 2032} 2033 2034/// isKnownToBeTypeSpecifier - Return true if we know that the specified token 2035/// is definitely a type-specifier. Return false if it isn't part of a type 2036/// specifier or if we're not sure. 2037bool Parser::isKnownToBeTypeSpecifier(const Token &Tok) const { 2038 switch (Tok.getKind()) { 2039 default: return false; 2040 // type-specifiers 2041 case tok::kw_short: 2042 case tok::kw_long: 2043 case tok::kw_signed: 2044 case tok::kw_unsigned: 2045 case tok::kw__Complex: 2046 case tok::kw__Imaginary: 2047 case tok::kw_void: 2048 case tok::kw_char: 2049 case tok::kw_wchar_t: 2050 case tok::kw_char16_t: 2051 case tok::kw_char32_t: 2052 case tok::kw_int: 2053 case tok::kw_float: 2054 case tok::kw_double: 2055 case tok::kw_bool: 2056 case tok::kw__Bool: 2057 case tok::kw__Decimal32: 2058 case tok::kw__Decimal64: 2059 case tok::kw__Decimal128: 2060 case tok::kw___vector: 2061 2062 // struct-or-union-specifier (C99) or class-specifier (C++) 2063 case tok::kw_class: 2064 case tok::kw_struct: 2065 case tok::kw_union: 2066 // enum-specifier 2067 case tok::kw_enum: 2068 2069 // typedef-name 2070 case tok::annot_typename: 2071 return true; 2072 } 2073} 2074 2075/// isTypeSpecifierQualifier - Return true if the current token could be the 2076/// start of a specifier-qualifier-list. 2077bool Parser::isTypeSpecifierQualifier() { 2078 switch (Tok.getKind()) { 2079 default: return false; 2080 2081 case tok::identifier: // foo::bar 2082 if (TryAltiVecVectorToken()) 2083 return true; 2084 // Fall through. 2085 case tok::kw_typename: // typename T::type 2086 // Annotate typenames and C++ scope specifiers. If we get one, just 2087 // recurse to handle whatever we get. 2088 if (TryAnnotateTypeOrScopeToken()) 2089 return true; 2090 if (Tok.is(tok::identifier)) 2091 return false; 2092 return isTypeSpecifierQualifier(); 2093 2094 case tok::coloncolon: // ::foo::bar 2095 if (NextToken().is(tok::kw_new) || // ::new 2096 NextToken().is(tok::kw_delete)) // ::delete 2097 return false; 2098 2099 if (TryAnnotateTypeOrScopeToken()) 2100 return true; 2101 return isTypeSpecifierQualifier(); 2102 2103 // GNU attributes support. 2104 case tok::kw___attribute: 2105 // GNU typeof support. 2106 case tok::kw_typeof: 2107 2108 // type-specifiers 2109 case tok::kw_short: 2110 case tok::kw_long: 2111 case tok::kw_signed: 2112 case tok::kw_unsigned: 2113 case tok::kw__Complex: 2114 case tok::kw__Imaginary: 2115 case tok::kw_void: 2116 case tok::kw_char: 2117 case tok::kw_wchar_t: 2118 case tok::kw_char16_t: 2119 case tok::kw_char32_t: 2120 case tok::kw_int: 2121 case tok::kw_float: 2122 case tok::kw_double: 2123 case tok::kw_bool: 2124 case tok::kw__Bool: 2125 case tok::kw__Decimal32: 2126 case tok::kw__Decimal64: 2127 case tok::kw__Decimal128: 2128 case tok::kw___vector: 2129 2130 // struct-or-union-specifier (C99) or class-specifier (C++) 2131 case tok::kw_class: 2132 case tok::kw_struct: 2133 case tok::kw_union: 2134 // enum-specifier 2135 case tok::kw_enum: 2136 2137 // type-qualifier 2138 case tok::kw_const: 2139 case tok::kw_volatile: 2140 case tok::kw_restrict: 2141 2142 // typedef-name 2143 case tok::annot_typename: 2144 return true; 2145 2146 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'. 2147 case tok::less: 2148 return getLang().ObjC1; 2149 2150 case tok::kw___cdecl: 2151 case tok::kw___stdcall: 2152 case tok::kw___fastcall: 2153 case tok::kw___w64: 2154 case tok::kw___ptr64: 2155 return true; 2156 } 2157} 2158 2159/// isDeclarationSpecifier() - Return true if the current token is part of a 2160/// declaration specifier. 2161bool Parser::isDeclarationSpecifier() { 2162 switch (Tok.getKind()) { 2163 default: return false; 2164 2165 case tok::identifier: // foo::bar 2166 // Unfortunate hack to support "Class.factoryMethod" notation. 2167 if (getLang().ObjC1 && NextToken().is(tok::period)) 2168 return false; 2169 if (TryAltiVecVectorToken()) 2170 return true; 2171 // Fall through. 2172 case tok::kw_typename: // typename T::type 2173 // Annotate typenames and C++ scope specifiers. If we get one, just 2174 // recurse to handle whatever we get. 2175 if (TryAnnotateTypeOrScopeToken()) 2176 return true; 2177 if (Tok.is(tok::identifier)) 2178 return false; 2179 return isDeclarationSpecifier(); 2180 2181 case tok::coloncolon: // ::foo::bar 2182 if (NextToken().is(tok::kw_new) || // ::new 2183 NextToken().is(tok::kw_delete)) // ::delete 2184 return false; 2185 2186 // Annotate typenames and C++ scope specifiers. If we get one, just 2187 // recurse to handle whatever we get. 2188 if (TryAnnotateTypeOrScopeToken()) 2189 return true; 2190 return isDeclarationSpecifier(); 2191 2192 // storage-class-specifier 2193 case tok::kw_typedef: 2194 case tok::kw_extern: 2195 case tok::kw___private_extern__: 2196 case tok::kw_static: 2197 case tok::kw_auto: 2198 case tok::kw_register: 2199 case tok::kw___thread: 2200 2201 // type-specifiers 2202 case tok::kw_short: 2203 case tok::kw_long: 2204 case tok::kw_signed: 2205 case tok::kw_unsigned: 2206 case tok::kw__Complex: 2207 case tok::kw__Imaginary: 2208 case tok::kw_void: 2209 case tok::kw_char: 2210 case tok::kw_wchar_t: 2211 case tok::kw_char16_t: 2212 case tok::kw_char32_t: 2213 2214 case tok::kw_int: 2215 case tok::kw_float: 2216 case tok::kw_double: 2217 case tok::kw_bool: 2218 case tok::kw__Bool: 2219 case tok::kw__Decimal32: 2220 case tok::kw__Decimal64: 2221 case tok::kw__Decimal128: 2222 case tok::kw___vector: 2223 2224 // struct-or-union-specifier (C99) or class-specifier (C++) 2225 case tok::kw_class: 2226 case tok::kw_struct: 2227 case tok::kw_union: 2228 // enum-specifier 2229 case tok::kw_enum: 2230 2231 // type-qualifier 2232 case tok::kw_const: 2233 case tok::kw_volatile: 2234 case tok::kw_restrict: 2235 2236 // function-specifier 2237 case tok::kw_inline: 2238 case tok::kw_virtual: 2239 case tok::kw_explicit: 2240 2241 // typedef-name 2242 case tok::annot_typename: 2243 2244 // GNU typeof support. 2245 case tok::kw_typeof: 2246 2247 // GNU attributes. 2248 case tok::kw___attribute: 2249 return true; 2250 2251 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'. 2252 case tok::less: 2253 return getLang().ObjC1; 2254 2255 case tok::kw___declspec: 2256 case tok::kw___cdecl: 2257 case tok::kw___stdcall: 2258 case tok::kw___fastcall: 2259 case tok::kw___w64: 2260 case tok::kw___ptr64: 2261 case tok::kw___forceinline: 2262 return true; 2263 } 2264} 2265 2266bool Parser::isConstructorDeclarator() { 2267 TentativeParsingAction TPA(*this); 2268 2269 // Parse the C++ scope specifier. 2270 CXXScopeSpec SS; 2271 if (ParseOptionalCXXScopeSpecifier(SS, 0, true)) { 2272 TPA.Revert(); 2273 return false; 2274 } 2275 2276 // Parse the constructor name. 2277 if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id)) { 2278 // We already know that we have a constructor name; just consume 2279 // the token. 2280 ConsumeToken(); 2281 } else { 2282 TPA.Revert(); 2283 return false; 2284 } 2285 2286 // Current class name must be followed by a left parentheses. 2287 if (Tok.isNot(tok::l_paren)) { 2288 TPA.Revert(); 2289 return false; 2290 } 2291 ConsumeParen(); 2292 2293 // A right parentheses or ellipsis signals that we have a constructor. 2294 if (Tok.is(tok::r_paren) || Tok.is(tok::ellipsis)) { 2295 TPA.Revert(); 2296 return true; 2297 } 2298 2299 // If we need to, enter the specified scope. 2300 DeclaratorScopeObj DeclScopeObj(*this, SS); 2301 if (SS.isSet() && Actions.ShouldEnterDeclaratorScope(CurScope, SS)) 2302 DeclScopeObj.EnterDeclaratorScope(); 2303 2304 // Check whether the next token(s) are part of a declaration 2305 // specifier, in which case we have the start of a parameter and, 2306 // therefore, we know that this is a constructor. 2307 bool IsConstructor = isDeclarationSpecifier(); 2308 TPA.Revert(); 2309 return IsConstructor; 2310} 2311 2312/// ParseTypeQualifierListOpt 2313/// type-qualifier-list: [C99 6.7.5] 2314/// type-qualifier 2315/// [GNU] attributes [ only if AttributesAllowed=true ] 2316/// type-qualifier-list type-qualifier 2317/// [GNU] type-qualifier-list attributes [ only if AttributesAllowed=true ] 2318/// [C++0x] attribute-specifier[opt] is allowed before cv-qualifier-seq 2319/// if CXX0XAttributesAllowed = true 2320/// 2321void Parser::ParseTypeQualifierListOpt(DeclSpec &DS, bool GNUAttributesAllowed, 2322 bool CXX0XAttributesAllowed) { 2323 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 2324 SourceLocation Loc = Tok.getLocation(); 2325 CXX0XAttributeList Attr = ParseCXX0XAttributes(); 2326 if (CXX0XAttributesAllowed) 2327 DS.AddAttributes(Attr.AttrList); 2328 else 2329 Diag(Loc, diag::err_attributes_not_allowed); 2330 } 2331 2332 while (1) { 2333 bool isInvalid = false; 2334 const char *PrevSpec = 0; 2335 unsigned DiagID = 0; 2336 SourceLocation Loc = Tok.getLocation(); 2337 2338 switch (Tok.getKind()) { 2339 case tok::kw_const: 2340 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, DiagID, 2341 getLang()); 2342 break; 2343 case tok::kw_volatile: 2344 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID, 2345 getLang()); 2346 break; 2347 case tok::kw_restrict: 2348 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID, 2349 getLang()); 2350 break; 2351 case tok::kw___w64: 2352 case tok::kw___ptr64: 2353 case tok::kw___cdecl: 2354 case tok::kw___stdcall: 2355 case tok::kw___fastcall: 2356 if (GNUAttributesAllowed) { 2357 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 2358 continue; 2359 } 2360 goto DoneWithTypeQuals; 2361 case tok::kw___attribute: 2362 if (GNUAttributesAllowed) { 2363 DS.AddAttributes(ParseGNUAttributes()); 2364 continue; // do *not* consume the next token! 2365 } 2366 // otherwise, FALL THROUGH! 2367 default: 2368 DoneWithTypeQuals: 2369 // If this is not a type-qualifier token, we're done reading type 2370 // qualifiers. First verify that DeclSpec's are consistent. 2371 DS.Finish(Diags, PP); 2372 return; 2373 } 2374 2375 // If the specifier combination wasn't legal, issue a diagnostic. 2376 if (isInvalid) { 2377 assert(PrevSpec && "Method did not return previous specifier!"); 2378 Diag(Tok, DiagID) << PrevSpec; 2379 } 2380 ConsumeToken(); 2381 } 2382} 2383 2384 2385/// ParseDeclarator - Parse and verify a newly-initialized declarator. 2386/// 2387void Parser::ParseDeclarator(Declarator &D) { 2388 /// This implements the 'declarator' production in the C grammar, then checks 2389 /// for well-formedness and issues diagnostics. 2390 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator); 2391} 2392 2393/// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator 2394/// is parsed by the function passed to it. Pass null, and the direct-declarator 2395/// isn't parsed at all, making this function effectively parse the C++ 2396/// ptr-operator production. 2397/// 2398/// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl] 2399/// [C] pointer[opt] direct-declarator 2400/// [C++] direct-declarator 2401/// [C++] ptr-operator declarator 2402/// 2403/// pointer: [C99 6.7.5] 2404/// '*' type-qualifier-list[opt] 2405/// '*' type-qualifier-list[opt] pointer 2406/// 2407/// ptr-operator: 2408/// '*' cv-qualifier-seq[opt] 2409/// '&' 2410/// [C++0x] '&&' 2411/// [GNU] '&' restrict[opt] attributes[opt] 2412/// [GNU?] '&&' restrict[opt] attributes[opt] 2413/// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt] 2414void Parser::ParseDeclaratorInternal(Declarator &D, 2415 DirectDeclParseFunction DirectDeclParser) { 2416 if (Diags.hasAllExtensionsSilenced()) 2417 D.setExtension(); 2418 // C++ member pointers start with a '::' or a nested-name. 2419 // Member pointers get special handling, since there's no place for the 2420 // scope spec in the generic path below. 2421 if (getLang().CPlusPlus && 2422 (Tok.is(tok::coloncolon) || Tok.is(tok::identifier) || 2423 Tok.is(tok::annot_cxxscope))) { 2424 CXXScopeSpec SS; 2425 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, true); // ignore fail 2426 2427 if (SS.isSet()) { 2428 if (Tok.isNot(tok::star)) { 2429 // The scope spec really belongs to the direct-declarator. 2430 D.getCXXScopeSpec() = SS; 2431 if (DirectDeclParser) 2432 (this->*DirectDeclParser)(D); 2433 return; 2434 } 2435 2436 SourceLocation Loc = ConsumeToken(); 2437 D.SetRangeEnd(Loc); 2438 DeclSpec DS; 2439 ParseTypeQualifierListOpt(DS); 2440 D.ExtendWithDeclSpec(DS); 2441 2442 // Recurse to parse whatever is left. 2443 ParseDeclaratorInternal(D, DirectDeclParser); 2444 2445 // Sema will have to catch (syntactically invalid) pointers into global 2446 // scope. It has to catch pointers into namespace scope anyway. 2447 D.AddTypeInfo(DeclaratorChunk::getMemberPointer(SS,DS.getTypeQualifiers(), 2448 Loc, DS.TakeAttributes()), 2449 /* Don't replace range end. */SourceLocation()); 2450 return; 2451 } 2452 } 2453 2454 tok::TokenKind Kind = Tok.getKind(); 2455 // Not a pointer, C++ reference, or block. 2456 if (Kind != tok::star && Kind != tok::caret && 2457 (Kind != tok::amp || !getLang().CPlusPlus) && 2458 // We parse rvalue refs in C++03, because otherwise the errors are scary. 2459 (Kind != tok::ampamp || !getLang().CPlusPlus)) { 2460 if (DirectDeclParser) 2461 (this->*DirectDeclParser)(D); 2462 return; 2463 } 2464 2465 // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference, 2466 // '&&' -> rvalue reference 2467 SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&. 2468 D.SetRangeEnd(Loc); 2469 2470 if (Kind == tok::star || Kind == tok::caret) { 2471 // Is a pointer. 2472 DeclSpec DS; 2473 2474 ParseTypeQualifierListOpt(DS); 2475 D.ExtendWithDeclSpec(DS); 2476 2477 // Recursively parse the declarator. 2478 ParseDeclaratorInternal(D, DirectDeclParser); 2479 if (Kind == tok::star) 2480 // Remember that we parsed a pointer type, and remember the type-quals. 2481 D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc, 2482 DS.TakeAttributes()), 2483 SourceLocation()); 2484 else 2485 // Remember that we parsed a Block type, and remember the type-quals. 2486 D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(), 2487 Loc, DS.TakeAttributes()), 2488 SourceLocation()); 2489 } else { 2490 // Is a reference 2491 DeclSpec DS; 2492 2493 // Complain about rvalue references in C++03, but then go on and build 2494 // the declarator. 2495 if (Kind == tok::ampamp && !getLang().CPlusPlus0x) 2496 Diag(Loc, diag::err_rvalue_reference); 2497 2498 // C++ 8.3.2p1: cv-qualified references are ill-formed except when the 2499 // cv-qualifiers are introduced through the use of a typedef or of a 2500 // template type argument, in which case the cv-qualifiers are ignored. 2501 // 2502 // [GNU] Retricted references are allowed. 2503 // [GNU] Attributes on references are allowed. 2504 // [C++0x] Attributes on references are not allowed. 2505 ParseTypeQualifierListOpt(DS, true, false); 2506 D.ExtendWithDeclSpec(DS); 2507 2508 if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) { 2509 if (DS.getTypeQualifiers() & DeclSpec::TQ_const) 2510 Diag(DS.getConstSpecLoc(), 2511 diag::err_invalid_reference_qualifier_application) << "const"; 2512 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) 2513 Diag(DS.getVolatileSpecLoc(), 2514 diag::err_invalid_reference_qualifier_application) << "volatile"; 2515 } 2516 2517 // Recursively parse the declarator. 2518 ParseDeclaratorInternal(D, DirectDeclParser); 2519 2520 if (D.getNumTypeObjects() > 0) { 2521 // C++ [dcl.ref]p4: There shall be no references to references. 2522 DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1); 2523 if (InnerChunk.Kind == DeclaratorChunk::Reference) { 2524 if (const IdentifierInfo *II = D.getIdentifier()) 2525 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference) 2526 << II; 2527 else 2528 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference) 2529 << "type name"; 2530 2531 // Once we've complained about the reference-to-reference, we 2532 // can go ahead and build the (technically ill-formed) 2533 // declarator: reference collapsing will take care of it. 2534 } 2535 } 2536 2537 // Remember that we parsed a reference type. It doesn't have type-quals. 2538 D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc, 2539 DS.TakeAttributes(), 2540 Kind == tok::amp), 2541 SourceLocation()); 2542 } 2543} 2544 2545/// ParseDirectDeclarator 2546/// direct-declarator: [C99 6.7.5] 2547/// [C99] identifier 2548/// '(' declarator ')' 2549/// [GNU] '(' attributes declarator ')' 2550/// [C90] direct-declarator '[' constant-expression[opt] ']' 2551/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']' 2552/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']' 2553/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']' 2554/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']' 2555/// direct-declarator '(' parameter-type-list ')' 2556/// direct-declarator '(' identifier-list[opt] ')' 2557/// [GNU] direct-declarator '(' parameter-forward-declarations 2558/// parameter-type-list[opt] ')' 2559/// [C++] direct-declarator '(' parameter-declaration-clause ')' 2560/// cv-qualifier-seq[opt] exception-specification[opt] 2561/// [C++] declarator-id 2562/// 2563/// declarator-id: [C++ 8] 2564/// id-expression 2565/// '::'[opt] nested-name-specifier[opt] type-name 2566/// 2567/// id-expression: [C++ 5.1] 2568/// unqualified-id 2569/// qualified-id 2570/// 2571/// unqualified-id: [C++ 5.1] 2572/// identifier 2573/// operator-function-id 2574/// conversion-function-id 2575/// '~' class-name 2576/// template-id 2577/// 2578void Parser::ParseDirectDeclarator(Declarator &D) { 2579 DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec()); 2580 2581 if (getLang().CPlusPlus && D.mayHaveIdentifier()) { 2582 // ParseDeclaratorInternal might already have parsed the scope. 2583 bool afterCXXScope = D.getCXXScopeSpec().isSet(); 2584 if (!afterCXXScope) { 2585 ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec(), /*ObjectType=*/0, 2586 true); 2587 afterCXXScope = D.getCXXScopeSpec().isSet(); 2588 } 2589 2590 if (afterCXXScope) { 2591 if (Actions.ShouldEnterDeclaratorScope(CurScope, D.getCXXScopeSpec())) 2592 // Change the declaration context for name lookup, until this function 2593 // is exited (and the declarator has been parsed). 2594 DeclScopeObj.EnterDeclaratorScope(); 2595 } 2596 2597 if (Tok.is(tok::identifier) || Tok.is(tok::kw_operator) || 2598 Tok.is(tok::annot_template_id) || Tok.is(tok::tilde)) { 2599 // We found something that indicates the start of an unqualified-id. 2600 // Parse that unqualified-id. 2601 bool AllowConstructorName 2602 = ((D.getCXXScopeSpec().isSet() && 2603 D.getContext() == Declarator::FileContext) || 2604 (!D.getCXXScopeSpec().isSet() && 2605 D.getContext() == Declarator::MemberContext)) && 2606 !D.getDeclSpec().hasTypeSpecifier(); 2607 if (ParseUnqualifiedId(D.getCXXScopeSpec(), 2608 /*EnteringContext=*/true, 2609 /*AllowDestructorName=*/true, 2610 AllowConstructorName, 2611 /*ObjectType=*/0, 2612 D.getName())) { 2613 D.SetIdentifier(0, Tok.getLocation()); 2614 D.setInvalidType(true); 2615 } else { 2616 // Parsed the unqualified-id; update range information and move along. 2617 if (D.getSourceRange().getBegin().isInvalid()) 2618 D.SetRangeBegin(D.getName().getSourceRange().getBegin()); 2619 D.SetRangeEnd(D.getName().getSourceRange().getEnd()); 2620 } 2621 goto PastIdentifier; 2622 } 2623 } else if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) { 2624 assert(!getLang().CPlusPlus && 2625 "There's a C++-specific check for tok::identifier above"); 2626 assert(Tok.getIdentifierInfo() && "Not an identifier?"); 2627 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 2628 ConsumeToken(); 2629 goto PastIdentifier; 2630 } 2631 2632 if (Tok.is(tok::l_paren)) { 2633 // direct-declarator: '(' declarator ')' 2634 // direct-declarator: '(' attributes declarator ')' 2635 // Example: 'char (*X)' or 'int (*XX)(void)' 2636 ParseParenDeclarator(D); 2637 2638 // If the declarator was parenthesized, we entered the declarator 2639 // scope when parsing the parenthesized declarator, then exited 2640 // the scope already. Re-enter the scope, if we need to. 2641 if (D.getCXXScopeSpec().isSet()) { 2642 if (Actions.ShouldEnterDeclaratorScope(CurScope, D.getCXXScopeSpec())) 2643 // Change the declaration context for name lookup, until this function 2644 // is exited (and the declarator has been parsed). 2645 DeclScopeObj.EnterDeclaratorScope(); 2646 } 2647 } else if (D.mayOmitIdentifier()) { 2648 // This could be something simple like "int" (in which case the declarator 2649 // portion is empty), if an abstract-declarator is allowed. 2650 D.SetIdentifier(0, Tok.getLocation()); 2651 } else { 2652 if (D.getContext() == Declarator::MemberContext) 2653 Diag(Tok, diag::err_expected_member_name_or_semi) 2654 << D.getDeclSpec().getSourceRange(); 2655 else if (getLang().CPlusPlus) 2656 Diag(Tok, diag::err_expected_unqualified_id) << getLang().CPlusPlus; 2657 else 2658 Diag(Tok, diag::err_expected_ident_lparen); 2659 D.SetIdentifier(0, Tok.getLocation()); 2660 D.setInvalidType(true); 2661 } 2662 2663 PastIdentifier: 2664 assert(D.isPastIdentifier() && 2665 "Haven't past the location of the identifier yet?"); 2666 2667 // Don't parse attributes unless we have an identifier. 2668 if (D.getIdentifier() && getLang().CPlusPlus0x 2669 && isCXX0XAttributeSpecifier(true)) { 2670 SourceLocation AttrEndLoc; 2671 CXX0XAttributeList Attr = ParseCXX0XAttributes(); 2672 D.AddAttributes(Attr.AttrList, AttrEndLoc); 2673 } 2674 2675 while (1) { 2676 if (Tok.is(tok::l_paren)) { 2677 // The paren may be part of a C++ direct initializer, eg. "int x(1);". 2678 // In such a case, check if we actually have a function declarator; if it 2679 // is not, the declarator has been fully parsed. 2680 if (getLang().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) { 2681 // When not in file scope, warn for ambiguous function declarators, just 2682 // in case the author intended it as a variable definition. 2683 bool warnIfAmbiguous = D.getContext() != Declarator::FileContext; 2684 if (!isCXXFunctionDeclarator(warnIfAmbiguous)) 2685 break; 2686 } 2687 ParseFunctionDeclarator(ConsumeParen(), D); 2688 } else if (Tok.is(tok::l_square)) { 2689 ParseBracketDeclarator(D); 2690 } else { 2691 break; 2692 } 2693 } 2694} 2695 2696/// ParseParenDeclarator - We parsed the declarator D up to a paren. This is 2697/// only called before the identifier, so these are most likely just grouping 2698/// parens for precedence. If we find that these are actually function 2699/// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator. 2700/// 2701/// direct-declarator: 2702/// '(' declarator ')' 2703/// [GNU] '(' attributes declarator ')' 2704/// direct-declarator '(' parameter-type-list ')' 2705/// direct-declarator '(' identifier-list[opt] ')' 2706/// [GNU] direct-declarator '(' parameter-forward-declarations 2707/// parameter-type-list[opt] ')' 2708/// 2709void Parser::ParseParenDeclarator(Declarator &D) { 2710 SourceLocation StartLoc = ConsumeParen(); 2711 assert(!D.isPastIdentifier() && "Should be called before passing identifier"); 2712 2713 // Eat any attributes before we look at whether this is a grouping or function 2714 // declarator paren. If this is a grouping paren, the attribute applies to 2715 // the type being built up, for example: 2716 // int (__attribute__(()) *x)(long y) 2717 // If this ends up not being a grouping paren, the attribute applies to the 2718 // first argument, for example: 2719 // int (__attribute__(()) int x) 2720 // In either case, we need to eat any attributes to be able to determine what 2721 // sort of paren this is. 2722 // 2723 llvm::OwningPtr<AttributeList> AttrList; 2724 bool RequiresArg = false; 2725 if (Tok.is(tok::kw___attribute)) { 2726 AttrList.reset(ParseGNUAttributes()); 2727 2728 // We require that the argument list (if this is a non-grouping paren) be 2729 // present even if the attribute list was empty. 2730 RequiresArg = true; 2731 } 2732 // Eat any Microsoft extensions. 2733 if (Tok.is(tok::kw___cdecl) || Tok.is(tok::kw___stdcall) || 2734 Tok.is(tok::kw___fastcall) || Tok.is(tok::kw___w64) || 2735 Tok.is(tok::kw___ptr64)) { 2736 AttrList.reset(ParseMicrosoftTypeAttributes(AttrList.take())); 2737 } 2738 2739 // If we haven't past the identifier yet (or where the identifier would be 2740 // stored, if this is an abstract declarator), then this is probably just 2741 // grouping parens. However, if this could be an abstract-declarator, then 2742 // this could also be the start of function arguments (consider 'void()'). 2743 bool isGrouping; 2744 2745 if (!D.mayOmitIdentifier()) { 2746 // If this can't be an abstract-declarator, this *must* be a grouping 2747 // paren, because we haven't seen the identifier yet. 2748 isGrouping = true; 2749 } else if (Tok.is(tok::r_paren) || // 'int()' is a function. 2750 (getLang().CPlusPlus && Tok.is(tok::ellipsis)) || // C++ int(...) 2751 isDeclarationSpecifier()) { // 'int(int)' is a function. 2752 // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is 2753 // considered to be a type, not a K&R identifier-list. 2754 isGrouping = false; 2755 } else { 2756 // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'. 2757 isGrouping = true; 2758 } 2759 2760 // If this is a grouping paren, handle: 2761 // direct-declarator: '(' declarator ')' 2762 // direct-declarator: '(' attributes declarator ')' 2763 if (isGrouping) { 2764 bool hadGroupingParens = D.hasGroupingParens(); 2765 D.setGroupingParens(true); 2766 if (AttrList) 2767 D.AddAttributes(AttrList.take(), SourceLocation()); 2768 2769 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator); 2770 // Match the ')'. 2771 SourceLocation Loc = MatchRHSPunctuation(tok::r_paren, StartLoc); 2772 2773 D.setGroupingParens(hadGroupingParens); 2774 D.SetRangeEnd(Loc); 2775 return; 2776 } 2777 2778 // Okay, if this wasn't a grouping paren, it must be the start of a function 2779 // argument list. Recognize that this declarator will never have an 2780 // identifier (and remember where it would have been), then call into 2781 // ParseFunctionDeclarator to handle of argument list. 2782 D.SetIdentifier(0, Tok.getLocation()); 2783 2784 ParseFunctionDeclarator(StartLoc, D, AttrList.take(), RequiresArg); 2785} 2786 2787/// ParseFunctionDeclarator - We are after the identifier and have parsed the 2788/// declarator D up to a paren, which indicates that we are parsing function 2789/// arguments. 2790/// 2791/// If AttrList is non-null, then the caller parsed those arguments immediately 2792/// after the open paren - they should be considered to be the first argument of 2793/// a parameter. If RequiresArg is true, then the first argument of the 2794/// function is required to be present and required to not be an identifier 2795/// list. 2796/// 2797/// This method also handles this portion of the grammar: 2798/// parameter-type-list: [C99 6.7.5] 2799/// parameter-list 2800/// parameter-list ',' '...' 2801/// [C++] parameter-list '...' 2802/// 2803/// parameter-list: [C99 6.7.5] 2804/// parameter-declaration 2805/// parameter-list ',' parameter-declaration 2806/// 2807/// parameter-declaration: [C99 6.7.5] 2808/// declaration-specifiers declarator 2809/// [C++] declaration-specifiers declarator '=' assignment-expression 2810/// [GNU] declaration-specifiers declarator attributes 2811/// declaration-specifiers abstract-declarator[opt] 2812/// [C++] declaration-specifiers abstract-declarator[opt] 2813/// '=' assignment-expression 2814/// [GNU] declaration-specifiers abstract-declarator[opt] attributes 2815/// 2816/// For C++, after the parameter-list, it also parses "cv-qualifier-seq[opt]" 2817/// and "exception-specification[opt]". 2818/// 2819void Parser::ParseFunctionDeclarator(SourceLocation LParenLoc, Declarator &D, 2820 AttributeList *AttrList, 2821 bool RequiresArg) { 2822 // lparen is already consumed! 2823 assert(D.isPastIdentifier() && "Should not call before identifier!"); 2824 2825 // This parameter list may be empty. 2826 if (Tok.is(tok::r_paren)) { 2827 if (RequiresArg) { 2828 Diag(Tok, diag::err_argument_required_after_attribute); 2829 delete AttrList; 2830 } 2831 2832 SourceLocation RParenLoc = ConsumeParen(); // Eat the closing ')'. 2833 SourceLocation EndLoc = RParenLoc; 2834 2835 // cv-qualifier-seq[opt]. 2836 DeclSpec DS; 2837 bool hasExceptionSpec = false; 2838 SourceLocation ThrowLoc; 2839 bool hasAnyExceptionSpec = false; 2840 llvm::SmallVector<TypeTy*, 2> Exceptions; 2841 llvm::SmallVector<SourceRange, 2> ExceptionRanges; 2842 if (getLang().CPlusPlus) { 2843 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 2844 if (!DS.getSourceRange().getEnd().isInvalid()) 2845 EndLoc = DS.getSourceRange().getEnd(); 2846 2847 // Parse exception-specification[opt]. 2848 if (Tok.is(tok::kw_throw)) { 2849 hasExceptionSpec = true; 2850 ThrowLoc = Tok.getLocation(); 2851 ParseExceptionSpecification(EndLoc, Exceptions, ExceptionRanges, 2852 hasAnyExceptionSpec); 2853 assert(Exceptions.size() == ExceptionRanges.size() && 2854 "Produced different number of exception types and ranges."); 2855 } 2856 } 2857 2858 // Remember that we parsed a function type, and remember the attributes. 2859 // int() -> no prototype, no '...'. 2860 D.AddTypeInfo(DeclaratorChunk::getFunction(/*prototype*/getLang().CPlusPlus, 2861 /*variadic*/ false, 2862 SourceLocation(), 2863 /*arglist*/ 0, 0, 2864 DS.getTypeQualifiers(), 2865 hasExceptionSpec, ThrowLoc, 2866 hasAnyExceptionSpec, 2867 Exceptions.data(), 2868 ExceptionRanges.data(), 2869 Exceptions.size(), 2870 LParenLoc, RParenLoc, D), 2871 EndLoc); 2872 return; 2873 } 2874 2875 // Alternatively, this parameter list may be an identifier list form for a 2876 // K&R-style function: void foo(a,b,c) 2877 if (!getLang().CPlusPlus && Tok.is(tok::identifier) 2878 && !TryAltiVecVectorToken()) { 2879 if (TryAnnotateTypeOrScopeToken() || !Tok.is(tok::annot_typename)) { 2880 // K&R identifier lists can't have typedefs as identifiers, per 2881 // C99 6.7.5.3p11. 2882 if (RequiresArg) { 2883 Diag(Tok, diag::err_argument_required_after_attribute); 2884 delete AttrList; 2885 } 2886 // Identifier list. Note that '(' identifier-list ')' is only allowed for 2887 // normal declarators, not for abstract-declarators. 2888 return ParseFunctionDeclaratorIdentifierList(LParenLoc, D); 2889 } 2890 } 2891 2892 // Finally, a normal, non-empty parameter type list. 2893 2894 // Build up an array of information about the parsed arguments. 2895 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; 2896 2897 // Enter function-declaration scope, limiting any declarators to the 2898 // function prototype scope, including parameter declarators. 2899 ParseScope PrototypeScope(this, 2900 Scope::FunctionPrototypeScope|Scope::DeclScope); 2901 2902 bool IsVariadic = false; 2903 SourceLocation EllipsisLoc; 2904 while (1) { 2905 if (Tok.is(tok::ellipsis)) { 2906 IsVariadic = true; 2907 EllipsisLoc = ConsumeToken(); // Consume the ellipsis. 2908 break; 2909 } 2910 2911 SourceLocation DSStart = Tok.getLocation(); 2912 2913 // Parse the declaration-specifiers. 2914 // Just use the ParsingDeclaration "scope" of the declarator. 2915 DeclSpec DS; 2916 2917 // If the caller parsed attributes for the first argument, add them now. 2918 if (AttrList) { 2919 DS.AddAttributes(AttrList); 2920 AttrList = 0; // Only apply the attributes to the first parameter. 2921 } 2922 ParseDeclarationSpecifiers(DS); 2923 2924 // Parse the declarator. This is "PrototypeContext", because we must 2925 // accept either 'declarator' or 'abstract-declarator' here. 2926 Declarator ParmDecl(DS, Declarator::PrototypeContext); 2927 ParseDeclarator(ParmDecl); 2928 2929 // Parse GNU attributes, if present. 2930 if (Tok.is(tok::kw___attribute)) { 2931 SourceLocation Loc; 2932 AttributeList *AttrList = ParseGNUAttributes(&Loc); 2933 ParmDecl.AddAttributes(AttrList, Loc); 2934 } 2935 2936 // Remember this parsed parameter in ParamInfo. 2937 IdentifierInfo *ParmII = ParmDecl.getIdentifier(); 2938 2939 // DefArgToks is used when the parsing of default arguments needs 2940 // to be delayed. 2941 CachedTokens *DefArgToks = 0; 2942 2943 // If no parameter was specified, verify that *something* was specified, 2944 // otherwise we have a missing type and identifier. 2945 if (DS.isEmpty() && ParmDecl.getIdentifier() == 0 && 2946 ParmDecl.getNumTypeObjects() == 0) { 2947 // Completely missing, emit error. 2948 Diag(DSStart, diag::err_missing_param); 2949 } else { 2950 // Otherwise, we have something. Add it and let semantic analysis try 2951 // to grok it and add the result to the ParamInfo we are building. 2952 2953 // Inform the actions module about the parameter declarator, so it gets 2954 // added to the current scope. 2955 DeclPtrTy Param = Actions.ActOnParamDeclarator(CurScope, ParmDecl); 2956 2957 // Parse the default argument, if any. We parse the default 2958 // arguments in all dialects; the semantic analysis in 2959 // ActOnParamDefaultArgument will reject the default argument in 2960 // C. 2961 if (Tok.is(tok::equal)) { 2962 SourceLocation EqualLoc = Tok.getLocation(); 2963 2964 // Parse the default argument 2965 if (D.getContext() == Declarator::MemberContext) { 2966 // If we're inside a class definition, cache the tokens 2967 // corresponding to the default argument. We'll actually parse 2968 // them when we see the end of the class definition. 2969 // FIXME: Templates will require something similar. 2970 // FIXME: Can we use a smart pointer for Toks? 2971 DefArgToks = new CachedTokens; 2972 2973 if (!ConsumeAndStoreUntil(tok::comma, tok::r_paren, *DefArgToks, 2974 tok::semi, false)) { 2975 delete DefArgToks; 2976 DefArgToks = 0; 2977 Actions.ActOnParamDefaultArgumentError(Param); 2978 } else 2979 Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc, 2980 (*DefArgToks)[1].getLocation()); 2981 } else { 2982 // Consume the '='. 2983 ConsumeToken(); 2984 2985 OwningExprResult DefArgResult(ParseAssignmentExpression()); 2986 if (DefArgResult.isInvalid()) { 2987 Actions.ActOnParamDefaultArgumentError(Param); 2988 SkipUntil(tok::comma, tok::r_paren, true, true); 2989 } else { 2990 // Inform the actions module about the default argument 2991 Actions.ActOnParamDefaultArgument(Param, EqualLoc, 2992 move(DefArgResult)); 2993 } 2994 } 2995 } 2996 2997 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, 2998 ParmDecl.getIdentifierLoc(), Param, 2999 DefArgToks)); 3000 } 3001 3002 // If the next token is a comma, consume it and keep reading arguments. 3003 if (Tok.isNot(tok::comma)) { 3004 if (Tok.is(tok::ellipsis)) { 3005 IsVariadic = true; 3006 EllipsisLoc = ConsumeToken(); // Consume the ellipsis. 3007 3008 if (!getLang().CPlusPlus) { 3009 // We have ellipsis without a preceding ',', which is ill-formed 3010 // in C. Complain and provide the fix. 3011 Diag(EllipsisLoc, diag::err_missing_comma_before_ellipsis) 3012 << CodeModificationHint::CreateInsertion(EllipsisLoc, ", "); 3013 } 3014 } 3015 3016 break; 3017 } 3018 3019 // Consume the comma. 3020 ConsumeToken(); 3021 } 3022 3023 // Leave prototype scope. 3024 PrototypeScope.Exit(); 3025 3026 // If we have the closing ')', eat it. 3027 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 3028 SourceLocation EndLoc = RParenLoc; 3029 3030 DeclSpec DS; 3031 bool hasExceptionSpec = false; 3032 SourceLocation ThrowLoc; 3033 bool hasAnyExceptionSpec = false; 3034 llvm::SmallVector<TypeTy*, 2> Exceptions; 3035 llvm::SmallVector<SourceRange, 2> ExceptionRanges; 3036 3037 if (getLang().CPlusPlus) { 3038 // Parse cv-qualifier-seq[opt]. 3039 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 3040 if (!DS.getSourceRange().getEnd().isInvalid()) 3041 EndLoc = DS.getSourceRange().getEnd(); 3042 3043 // Parse exception-specification[opt]. 3044 if (Tok.is(tok::kw_throw)) { 3045 hasExceptionSpec = true; 3046 ThrowLoc = Tok.getLocation(); 3047 ParseExceptionSpecification(EndLoc, Exceptions, ExceptionRanges, 3048 hasAnyExceptionSpec); 3049 assert(Exceptions.size() == ExceptionRanges.size() && 3050 "Produced different number of exception types and ranges."); 3051 } 3052 } 3053 3054 // Remember that we parsed a function type, and remember the attributes. 3055 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/true, IsVariadic, 3056 EllipsisLoc, 3057 ParamInfo.data(), ParamInfo.size(), 3058 DS.getTypeQualifiers(), 3059 hasExceptionSpec, ThrowLoc, 3060 hasAnyExceptionSpec, 3061 Exceptions.data(), 3062 ExceptionRanges.data(), 3063 Exceptions.size(), 3064 LParenLoc, RParenLoc, D), 3065 EndLoc); 3066} 3067 3068/// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator 3069/// we found a K&R-style identifier list instead of a type argument list. The 3070/// current token is known to be the first identifier in the list. 3071/// 3072/// identifier-list: [C99 6.7.5] 3073/// identifier 3074/// identifier-list ',' identifier 3075/// 3076void Parser::ParseFunctionDeclaratorIdentifierList(SourceLocation LParenLoc, 3077 Declarator &D) { 3078 // Build up an array of information about the parsed arguments. 3079 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; 3080 llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar; 3081 3082 // If there was no identifier specified for the declarator, either we are in 3083 // an abstract-declarator, or we are in a parameter declarator which was found 3084 // to be abstract. In abstract-declarators, identifier lists are not valid: 3085 // diagnose this. 3086 if (!D.getIdentifier()) 3087 Diag(Tok, diag::ext_ident_list_in_param); 3088 3089 // Tok is known to be the first identifier in the list. Remember this 3090 // identifier in ParamInfo. 3091 ParamsSoFar.insert(Tok.getIdentifierInfo()); 3092 ParamInfo.push_back(DeclaratorChunk::ParamInfo(Tok.getIdentifierInfo(), 3093 Tok.getLocation(), 3094 DeclPtrTy())); 3095 3096 ConsumeToken(); // eat the first identifier. 3097 3098 while (Tok.is(tok::comma)) { 3099 // Eat the comma. 3100 ConsumeToken(); 3101 3102 // If this isn't an identifier, report the error and skip until ')'. 3103 if (Tok.isNot(tok::identifier)) { 3104 Diag(Tok, diag::err_expected_ident); 3105 SkipUntil(tok::r_paren); 3106 return; 3107 } 3108 3109 IdentifierInfo *ParmII = Tok.getIdentifierInfo(); 3110 3111 // Reject 'typedef int y; int test(x, y)', but continue parsing. 3112 if (Actions.getTypeName(*ParmII, Tok.getLocation(), CurScope)) 3113 Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII; 3114 3115 // Verify that the argument identifier has not already been mentioned. 3116 if (!ParamsSoFar.insert(ParmII)) { 3117 Diag(Tok, diag::err_param_redefinition) << ParmII; 3118 } else { 3119 // Remember this identifier in ParamInfo. 3120 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, 3121 Tok.getLocation(), 3122 DeclPtrTy())); 3123 } 3124 3125 // Eat the identifier. 3126 ConsumeToken(); 3127 } 3128 3129 // If we have the closing ')', eat it and we're done. 3130 SourceLocation RLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 3131 3132 // Remember that we parsed a function type, and remember the attributes. This 3133 // function type is always a K&R style function type, which is not varargs and 3134 // has no prototype. 3135 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/false, /*varargs*/false, 3136 SourceLocation(), 3137 &ParamInfo[0], ParamInfo.size(), 3138 /*TypeQuals*/0, 3139 /*exception*/false, 3140 SourceLocation(), false, 0, 0, 0, 3141 LParenLoc, RLoc, D), 3142 RLoc); 3143} 3144 3145/// [C90] direct-declarator '[' constant-expression[opt] ']' 3146/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']' 3147/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']' 3148/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']' 3149/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']' 3150void Parser::ParseBracketDeclarator(Declarator &D) { 3151 SourceLocation StartLoc = ConsumeBracket(); 3152 3153 // C array syntax has many features, but by-far the most common is [] and [4]. 3154 // This code does a fast path to handle some of the most obvious cases. 3155 if (Tok.getKind() == tok::r_square) { 3156 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 3157 //FIXME: Use these 3158 CXX0XAttributeList Attr; 3159 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier(true)) { 3160 Attr = ParseCXX0XAttributes(); 3161 } 3162 3163 // Remember that we parsed the empty array type. 3164 OwningExprResult NumElements(Actions); 3165 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, 0, 3166 StartLoc, EndLoc), 3167 EndLoc); 3168 return; 3169 } else if (Tok.getKind() == tok::numeric_constant && 3170 GetLookAheadToken(1).is(tok::r_square)) { 3171 // [4] is very common. Parse the numeric constant expression. 3172 OwningExprResult ExprRes(Actions.ActOnNumericConstant(Tok)); 3173 ConsumeToken(); 3174 3175 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 3176 //FIXME: Use these 3177 CXX0XAttributeList Attr; 3178 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 3179 Attr = ParseCXX0XAttributes(); 3180 } 3181 3182 // If there was an error parsing the assignment-expression, recover. 3183 if (ExprRes.isInvalid()) 3184 ExprRes.release(); // Deallocate expr, just use []. 3185 3186 // Remember that we parsed a array type, and remember its features. 3187 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, 0, ExprRes.release(), 3188 StartLoc, EndLoc), 3189 EndLoc); 3190 return; 3191 } 3192 3193 // If valid, this location is the position where we read the 'static' keyword. 3194 SourceLocation StaticLoc; 3195 if (Tok.is(tok::kw_static)) 3196 StaticLoc = ConsumeToken(); 3197 3198 // If there is a type-qualifier-list, read it now. 3199 // Type qualifiers in an array subscript are a C99 feature. 3200 DeclSpec DS; 3201 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 3202 3203 // If we haven't already read 'static', check to see if there is one after the 3204 // type-qualifier-list. 3205 if (!StaticLoc.isValid() && Tok.is(tok::kw_static)) 3206 StaticLoc = ConsumeToken(); 3207 3208 // Handle "direct-declarator [ type-qual-list[opt] * ]". 3209 bool isStar = false; 3210 OwningExprResult NumElements(Actions); 3211 3212 // Handle the case where we have '[*]' as the array size. However, a leading 3213 // star could be the start of an expression, for example 'X[*p + 4]'. Verify 3214 // the the token after the star is a ']'. Since stars in arrays are 3215 // infrequent, use of lookahead is not costly here. 3216 if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) { 3217 ConsumeToken(); // Eat the '*'. 3218 3219 if (StaticLoc.isValid()) { 3220 Diag(StaticLoc, diag::err_unspecified_vla_size_with_static); 3221 StaticLoc = SourceLocation(); // Drop the static. 3222 } 3223 isStar = true; 3224 } else if (Tok.isNot(tok::r_square)) { 3225 // Note, in C89, this production uses the constant-expr production instead 3226 // of assignment-expr. The only difference is that assignment-expr allows 3227 // things like '=' and '*='. Sema rejects these in C89 mode because they 3228 // are not i-c-e's, so we don't need to distinguish between the two here. 3229 3230 // Parse the constant-expression or assignment-expression now (depending 3231 // on dialect). 3232 if (getLang().CPlusPlus) 3233 NumElements = ParseConstantExpression(); 3234 else 3235 NumElements = ParseAssignmentExpression(); 3236 } 3237 3238 // If there was an error parsing the assignment-expression, recover. 3239 if (NumElements.isInvalid()) { 3240 D.setInvalidType(true); 3241 // If the expression was invalid, skip it. 3242 SkipUntil(tok::r_square); 3243 return; 3244 } 3245 3246 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 3247 3248 //FIXME: Use these 3249 CXX0XAttributeList Attr; 3250 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 3251 Attr = ParseCXX0XAttributes(); 3252 } 3253 3254 // Remember that we parsed a array type, and remember its features. 3255 D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(), 3256 StaticLoc.isValid(), isStar, 3257 NumElements.release(), 3258 StartLoc, EndLoc), 3259 EndLoc); 3260} 3261 3262/// [GNU] typeof-specifier: 3263/// typeof ( expressions ) 3264/// typeof ( type-name ) 3265/// [GNU/C++] typeof unary-expression 3266/// 3267void Parser::ParseTypeofSpecifier(DeclSpec &DS) { 3268 assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier"); 3269 Token OpTok = Tok; 3270 SourceLocation StartLoc = ConsumeToken(); 3271 3272 const bool hasParens = Tok.is(tok::l_paren); 3273 3274 bool isCastExpr; 3275 TypeTy *CastTy; 3276 SourceRange CastRange; 3277 OwningExprResult Operand = ParseExprAfterTypeofSizeofAlignof(OpTok, 3278 isCastExpr, 3279 CastTy, 3280 CastRange); 3281 if (hasParens) 3282 DS.setTypeofParensRange(CastRange); 3283 3284 if (CastRange.getEnd().isInvalid()) 3285 // FIXME: Not accurate, the range gets one token more than it should. 3286 DS.SetRangeEnd(Tok.getLocation()); 3287 else 3288 DS.SetRangeEnd(CastRange.getEnd()); 3289 3290 if (isCastExpr) { 3291 if (!CastTy) { 3292 DS.SetTypeSpecError(); 3293 return; 3294 } 3295 3296 const char *PrevSpec = 0; 3297 unsigned DiagID; 3298 // Check for duplicate type specifiers (e.g. "int typeof(int)"). 3299 if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec, 3300 DiagID, CastTy)) 3301 Diag(StartLoc, DiagID) << PrevSpec; 3302 return; 3303 } 3304 3305 // If we get here, the operand to the typeof was an expresion. 3306 if (Operand.isInvalid()) { 3307 DS.SetTypeSpecError(); 3308 return; 3309 } 3310 3311 const char *PrevSpec = 0; 3312 unsigned DiagID; 3313 // Check for duplicate type specifiers (e.g. "int typeof(int)"). 3314 if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec, 3315 DiagID, Operand.release())) 3316 Diag(StartLoc, DiagID) << PrevSpec; 3317} 3318 3319 3320/// TryAltiVecVectorTokenOutOfLine - Out of line body that should only be called 3321/// from TryAltiVecVectorToken. 3322bool Parser::TryAltiVecVectorTokenOutOfLine() { 3323 Token Next = NextToken(); 3324 switch (Next.getKind()) { 3325 default: return false; 3326 case tok::kw_short: 3327 case tok::kw_long: 3328 case tok::kw_signed: 3329 case tok::kw_unsigned: 3330 case tok::kw_void: 3331 case tok::kw_char: 3332 case tok::kw_int: 3333 case tok::kw_float: 3334 case tok::kw_double: 3335 case tok::kw_bool: 3336 case tok::kw___pixel: 3337 Tok.setKind(tok::kw___vector); 3338 return true; 3339 case tok::identifier: 3340 if (Next.getIdentifierInfo() == Ident_pixel) { 3341 Tok.setKind(tok::kw___vector); 3342 return true; 3343 } 3344 return false; 3345 } 3346} 3347 3348bool Parser::TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc, 3349 const char *&PrevSpec, unsigned &DiagID, 3350 bool &isInvalid) { 3351 if (Tok.getIdentifierInfo() == Ident_vector) { 3352 Token Next = NextToken(); 3353 switch (Next.getKind()) { 3354 case tok::kw_short: 3355 case tok::kw_long: 3356 case tok::kw_signed: 3357 case tok::kw_unsigned: 3358 case tok::kw_void: 3359 case tok::kw_char: 3360 case tok::kw_int: 3361 case tok::kw_float: 3362 case tok::kw_double: 3363 case tok::kw_bool: 3364 case tok::kw___pixel: 3365 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 3366 return true; 3367 case tok::identifier: 3368 if (Next.getIdentifierInfo() == Ident_pixel) { 3369 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 3370 return true; 3371 } 3372 break; 3373 default: 3374 break; 3375 } 3376 } else if (Tok.getIdentifierInfo() == Ident_pixel && 3377 DS.isTypeAltiVecVector()) { 3378 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID); 3379 return true; 3380 } 3381 return false; 3382} 3383 3384