ParseDecl.cpp revision 3e156ad9adc7332e626eedbc86aa4e3b03f17ca5
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 "paramterized" 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::semi, true, true); 568 return DeclPtrTy(); 569 } 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 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, 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 // Annotate C++ scope specifiers. If we get one, loop. 863 if (TryAnnotateCXXScopeToken(true)) 864 continue; 865 goto DoneWithDeclSpec; 866 867 case tok::annot_cxxscope: { 868 if (DS.hasTypeSpecifier()) 869 goto DoneWithDeclSpec; 870 871 CXXScopeSpec SS; 872 SS.setScopeRep(Tok.getAnnotationValue()); 873 SS.setRange(Tok.getAnnotationRange()); 874 875 // We are looking for a qualified typename. 876 Token Next = NextToken(); 877 if (Next.is(tok::annot_template_id) && 878 static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()) 879 ->Kind == TNK_Type_template) { 880 // We have a qualified template-id, e.g., N::A<int> 881 882 // C++ [class.qual]p2: 883 // In a lookup in which the constructor is an acceptable lookup 884 // result and the nested-name-specifier nominates a class C: 885 // 886 // - if the name specified after the 887 // nested-name-specifier, when looked up in C, is the 888 // injected-class-name of C (Clause 9), or 889 // 890 // - if the name specified after the nested-name-specifier 891 // is the same as the identifier or the 892 // simple-template-id's template-name in the last 893 // component of the nested-name-specifier, 894 // 895 // the name is instead considered to name the constructor of 896 // class C. 897 // 898 // Thus, if the template-name is actually the constructor 899 // name, then the code is ill-formed; this interpretation is 900 // reinforced by the NAD status of core issue 635. 901 TemplateIdAnnotation *TemplateId 902 = static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()); 903 if (DSContext == DSC_top_level && TemplateId->Name && 904 Actions.isCurrentClassName(*TemplateId->Name, CurScope, &SS)) { 905 if (isConstructorDeclarator()) { 906 // The user meant this to be an out-of-line constructor 907 // definition, but template arguments are not allowed 908 // there. Just allow this as a constructor; we'll 909 // complain about it later. 910 goto DoneWithDeclSpec; 911 } 912 913 // The user meant this to name a type, but it actually names 914 // a constructor with some extraneous template 915 // arguments. Complain, then parse it as a type as the user 916 // intended. 917 Diag(TemplateId->TemplateNameLoc, 918 diag::err_out_of_line_template_id_names_constructor) 919 << TemplateId->Name; 920 } 921 922 DS.getTypeSpecScope() = SS; 923 ConsumeToken(); // The C++ scope. 924 assert(Tok.is(tok::annot_template_id) && 925 "ParseOptionalCXXScopeSpecifier not working"); 926 AnnotateTemplateIdTokenAsType(&SS); 927 continue; 928 } 929 930 if (Next.is(tok::annot_typename)) { 931 DS.getTypeSpecScope() = SS; 932 ConsumeToken(); // The C++ scope. 933 if (Tok.getAnnotationValue()) 934 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, 935 PrevSpec, DiagID, 936 Tok.getAnnotationValue()); 937 else 938 DS.SetTypeSpecError(); 939 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 940 ConsumeToken(); // The typename 941 } 942 943 if (Next.isNot(tok::identifier)) 944 goto DoneWithDeclSpec; 945 946 // If we're in a context where the identifier could be a class name, 947 // check whether this is a constructor declaration. 948 if (DSContext == DSC_top_level && 949 Actions.isCurrentClassName(*Next.getIdentifierInfo(), CurScope, 950 &SS)) { 951 if (isConstructorDeclarator()) 952 goto DoneWithDeclSpec; 953 954 // As noted in C++ [class.qual]p2 (cited above), when the name 955 // of the class is qualified in a context where it could name 956 // a constructor, its a constructor name. However, we've 957 // looked at the declarator, and the user probably meant this 958 // to be a type. Complain that it isn't supposed to be treated 959 // as a type, then proceed to parse it as a type. 960 Diag(Next.getLocation(), diag::err_out_of_line_type_names_constructor) 961 << Next.getIdentifierInfo(); 962 } 963 964 TypeTy *TypeRep = Actions.getTypeName(*Next.getIdentifierInfo(), 965 Next.getLocation(), CurScope, &SS); 966 967 // If the referenced identifier is not a type, then this declspec is 968 // erroneous: We already checked about that it has no type specifier, and 969 // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the 970 // typename. 971 if (TypeRep == 0) { 972 ConsumeToken(); // Eat the scope spec so the identifier is current. 973 if (ParseImplicitInt(DS, &SS, TemplateInfo, AS)) continue; 974 goto DoneWithDeclSpec; 975 } 976 977 DS.getTypeSpecScope() = SS; 978 ConsumeToken(); // The C++ scope. 979 980 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 981 DiagID, TypeRep); 982 if (isInvalid) 983 break; 984 985 DS.SetRangeEnd(Tok.getLocation()); 986 ConsumeToken(); // The typename. 987 988 continue; 989 } 990 991 case tok::annot_typename: { 992 if (Tok.getAnnotationValue()) 993 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 994 DiagID, Tok.getAnnotationValue()); 995 else 996 DS.SetTypeSpecError(); 997 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 998 ConsumeToken(); // The typename 999 1000 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1001 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1002 // Objective-C interface. If we don't have Objective-C or a '<', this is 1003 // just a normal reference to a typedef name. 1004 if (!Tok.is(tok::less) || !getLang().ObjC1) 1005 continue; 1006 1007 SourceLocation LAngleLoc, EndProtoLoc; 1008 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1009 llvm::SmallVector<SourceLocation, 8> ProtocolLocs; 1010 ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false, 1011 LAngleLoc, EndProtoLoc); 1012 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(), 1013 ProtocolLocs.data(), LAngleLoc); 1014 1015 DS.SetRangeEnd(EndProtoLoc); 1016 continue; 1017 } 1018 1019 // typedef-name 1020 case tok::identifier: { 1021 // In C++, check to see if this is a scope specifier like foo::bar::, if 1022 // so handle it as such. This is important for ctor parsing. 1023 if (getLang().CPlusPlus && TryAnnotateCXXScopeToken(true)) 1024 continue; 1025 1026 // This identifier can only be a typedef name if we haven't already seen 1027 // a type-specifier. Without this check we misparse: 1028 // typedef int X; struct Y { short X; }; as 'short int'. 1029 if (DS.hasTypeSpecifier()) 1030 goto DoneWithDeclSpec; 1031 1032 // It has to be available as a typedef too! 1033 TypeTy *TypeRep = Actions.getTypeName(*Tok.getIdentifierInfo(), 1034 Tok.getLocation(), CurScope); 1035 1036 // If this is not a typedef name, don't parse it as part of the declspec, 1037 // it must be an implicit int or an error. 1038 if (TypeRep == 0) { 1039 if (ParseImplicitInt(DS, 0, TemplateInfo, AS)) continue; 1040 goto DoneWithDeclSpec; 1041 } 1042 1043 // If we're in a context where the identifier could be a class name, 1044 // check whether this is a constructor declaration. 1045 if (getLang().CPlusPlus && DSContext == DSC_class && 1046 Actions.isCurrentClassName(*Tok.getIdentifierInfo(), CurScope) && 1047 isConstructorDeclarator()) 1048 goto DoneWithDeclSpec; 1049 1050 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1051 DiagID, TypeRep); 1052 if (isInvalid) 1053 break; 1054 1055 DS.SetRangeEnd(Tok.getLocation()); 1056 ConsumeToken(); // The identifier 1057 1058 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1059 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1060 // Objective-C interface. If we don't have Objective-C or a '<', this is 1061 // just a normal reference to a typedef name. 1062 if (!Tok.is(tok::less) || !getLang().ObjC1) 1063 continue; 1064 1065 SourceLocation LAngleLoc, EndProtoLoc; 1066 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1067 llvm::SmallVector<SourceLocation, 8> ProtocolLocs; 1068 ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false, 1069 LAngleLoc, EndProtoLoc); 1070 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(), 1071 ProtocolLocs.data(), LAngleLoc); 1072 1073 DS.SetRangeEnd(EndProtoLoc); 1074 1075 // Need to support trailing type qualifiers (e.g. "id<p> const"). 1076 // If a type specifier follows, it will be diagnosed elsewhere. 1077 continue; 1078 } 1079 1080 // type-name 1081 case tok::annot_template_id: { 1082 TemplateIdAnnotation *TemplateId 1083 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 1084 if (TemplateId->Kind != TNK_Type_template) { 1085 // This template-id does not refer to a type name, so we're 1086 // done with the type-specifiers. 1087 goto DoneWithDeclSpec; 1088 } 1089 1090 // If we're in a context where the template-id could be a 1091 // constructor name or specialization, check whether this is a 1092 // constructor declaration. 1093 if (getLang().CPlusPlus && DSContext == DSC_class && 1094 Actions.isCurrentClassName(*TemplateId->Name, CurScope) && 1095 isConstructorDeclarator()) 1096 goto DoneWithDeclSpec; 1097 1098 // Turn the template-id annotation token into a type annotation 1099 // token, then try again to parse it as a type-specifier. 1100 AnnotateTemplateIdTokenAsType(); 1101 continue; 1102 } 1103 1104 // GNU attributes support. 1105 case tok::kw___attribute: 1106 DS.AddAttributes(ParseGNUAttributes()); 1107 continue; 1108 1109 // Microsoft declspec support. 1110 case tok::kw___declspec: 1111 DS.AddAttributes(ParseMicrosoftDeclSpec()); 1112 continue; 1113 1114 // Microsoft single token adornments. 1115 case tok::kw___forceinline: 1116 // FIXME: Add handling here! 1117 break; 1118 1119 case tok::kw___ptr64: 1120 case tok::kw___w64: 1121 case tok::kw___cdecl: 1122 case tok::kw___stdcall: 1123 case tok::kw___fastcall: 1124 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 1125 continue; 1126 1127 // storage-class-specifier 1128 case tok::kw_typedef: 1129 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_typedef, Loc, PrevSpec, 1130 DiagID); 1131 break; 1132 case tok::kw_extern: 1133 if (DS.isThreadSpecified()) 1134 Diag(Tok, diag::ext_thread_before) << "extern"; 1135 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_extern, Loc, PrevSpec, 1136 DiagID); 1137 break; 1138 case tok::kw___private_extern__: 1139 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_private_extern, Loc, 1140 PrevSpec, DiagID); 1141 break; 1142 case tok::kw_static: 1143 if (DS.isThreadSpecified()) 1144 Diag(Tok, diag::ext_thread_before) << "static"; 1145 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_static, Loc, PrevSpec, 1146 DiagID); 1147 break; 1148 case tok::kw_auto: 1149 if (getLang().CPlusPlus0x) 1150 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, 1151 DiagID); 1152 else 1153 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_auto, Loc, PrevSpec, 1154 DiagID); 1155 break; 1156 case tok::kw_register: 1157 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_register, Loc, PrevSpec, 1158 DiagID); 1159 break; 1160 case tok::kw_mutable: 1161 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_mutable, Loc, PrevSpec, 1162 DiagID); 1163 break; 1164 case tok::kw___thread: 1165 isInvalid = DS.SetStorageClassSpecThread(Loc, PrevSpec, DiagID); 1166 break; 1167 1168 // function-specifier 1169 case tok::kw_inline: 1170 isInvalid = DS.SetFunctionSpecInline(Loc, PrevSpec, DiagID); 1171 break; 1172 case tok::kw_virtual: 1173 isInvalid = DS.SetFunctionSpecVirtual(Loc, PrevSpec, DiagID); 1174 break; 1175 case tok::kw_explicit: 1176 isInvalid = DS.SetFunctionSpecExplicit(Loc, PrevSpec, DiagID); 1177 break; 1178 1179 // friend 1180 case tok::kw_friend: 1181 if (DSContext == DSC_class) 1182 isInvalid = DS.SetFriendSpec(Loc, PrevSpec, DiagID); 1183 else { 1184 PrevSpec = ""; // not actually used by the diagnostic 1185 DiagID = diag::err_friend_invalid_in_context; 1186 isInvalid = true; 1187 } 1188 break; 1189 1190 // constexpr 1191 case tok::kw_constexpr: 1192 isInvalid = DS.SetConstexprSpec(Loc, PrevSpec, DiagID); 1193 break; 1194 1195 // type-specifier 1196 case tok::kw_short: 1197 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, 1198 DiagID); 1199 break; 1200 case tok::kw_long: 1201 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long) 1202 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, 1203 DiagID); 1204 else 1205 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 1206 DiagID); 1207 break; 1208 case tok::kw_signed: 1209 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, 1210 DiagID); 1211 break; 1212 case tok::kw_unsigned: 1213 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, 1214 DiagID); 1215 break; 1216 case tok::kw__Complex: 1217 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec, 1218 DiagID); 1219 break; 1220 case tok::kw__Imaginary: 1221 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec, 1222 DiagID); 1223 break; 1224 case tok::kw_void: 1225 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, 1226 DiagID); 1227 break; 1228 case tok::kw_char: 1229 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, 1230 DiagID); 1231 break; 1232 case tok::kw_int: 1233 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, 1234 DiagID); 1235 break; 1236 case tok::kw_float: 1237 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, 1238 DiagID); 1239 break; 1240 case tok::kw_double: 1241 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, 1242 DiagID); 1243 break; 1244 case tok::kw_wchar_t: 1245 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, 1246 DiagID); 1247 break; 1248 case tok::kw_char16_t: 1249 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, 1250 DiagID); 1251 break; 1252 case tok::kw_char32_t: 1253 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, 1254 DiagID); 1255 break; 1256 case tok::kw_bool: 1257 case tok::kw__Bool: 1258 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, 1259 DiagID); 1260 break; 1261 case tok::kw__Decimal32: 1262 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec, 1263 DiagID); 1264 break; 1265 case tok::kw__Decimal64: 1266 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec, 1267 DiagID); 1268 break; 1269 case tok::kw__Decimal128: 1270 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec, 1271 DiagID); 1272 break; 1273 1274 // class-specifier: 1275 case tok::kw_class: 1276 case tok::kw_struct: 1277 case tok::kw_union: { 1278 tok::TokenKind Kind = Tok.getKind(); 1279 ConsumeToken(); 1280 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS); 1281 continue; 1282 } 1283 1284 // enum-specifier: 1285 case tok::kw_enum: 1286 ConsumeToken(); 1287 ParseEnumSpecifier(Loc, DS, AS); 1288 continue; 1289 1290 // cv-qualifier: 1291 case tok::kw_const: 1292 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec, DiagID, 1293 getLang()); 1294 break; 1295 case tok::kw_volatile: 1296 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID, 1297 getLang()); 1298 break; 1299 case tok::kw_restrict: 1300 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID, 1301 getLang()); 1302 break; 1303 1304 // C++ typename-specifier: 1305 case tok::kw_typename: 1306 if (TryAnnotateTypeOrScopeToken()) 1307 continue; 1308 break; 1309 1310 // GNU typeof support. 1311 case tok::kw_typeof: 1312 ParseTypeofSpecifier(DS); 1313 continue; 1314 1315 case tok::kw_decltype: 1316 ParseDecltypeSpecifier(DS); 1317 continue; 1318 1319 case tok::less: 1320 // GCC ObjC supports types like "<SomeProtocol>" as a synonym for 1321 // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous, 1322 // but we support it. 1323 if (DS.hasTypeSpecifier() || !getLang().ObjC1) 1324 goto DoneWithDeclSpec; 1325 1326 { 1327 SourceLocation LAngleLoc, EndProtoLoc; 1328 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1329 llvm::SmallVector<SourceLocation, 8> ProtocolLocs; 1330 ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false, 1331 LAngleLoc, EndProtoLoc); 1332 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(), 1333 ProtocolLocs.data(), LAngleLoc); 1334 DS.SetRangeEnd(EndProtoLoc); 1335 1336 Diag(Loc, diag::warn_objc_protocol_qualifier_missing_id) 1337 << CodeModificationHint::CreateInsertion(Loc, "id") 1338 << SourceRange(Loc, EndProtoLoc); 1339 // Need to support trailing type qualifiers (e.g. "id<p> const"). 1340 // If a type specifier follows, it will be diagnosed elsewhere. 1341 continue; 1342 } 1343 } 1344 // If the specifier wasn't legal, issue a diagnostic. 1345 if (isInvalid) { 1346 assert(PrevSpec && "Method did not return previous specifier!"); 1347 assert(DiagID); 1348 Diag(Tok, DiagID) << PrevSpec; 1349 } 1350 DS.SetRangeEnd(Tok.getLocation()); 1351 ConsumeToken(); 1352 } 1353} 1354 1355/// ParseOptionalTypeSpecifier - Try to parse a single type-specifier. We 1356/// primarily follow the C++ grammar with additions for C99 and GNU, 1357/// which together subsume the C grammar. Note that the C++ 1358/// type-specifier also includes the C type-qualifier (for const, 1359/// volatile, and C99 restrict). Returns true if a type-specifier was 1360/// found (and parsed), false otherwise. 1361/// 1362/// type-specifier: [C++ 7.1.5] 1363/// simple-type-specifier 1364/// class-specifier 1365/// enum-specifier 1366/// elaborated-type-specifier [TODO] 1367/// cv-qualifier 1368/// 1369/// cv-qualifier: [C++ 7.1.5.1] 1370/// 'const' 1371/// 'volatile' 1372/// [C99] 'restrict' 1373/// 1374/// simple-type-specifier: [ C++ 7.1.5.2] 1375/// '::'[opt] nested-name-specifier[opt] type-name [TODO] 1376/// '::'[opt] nested-name-specifier 'template' template-id [TODO] 1377/// 'char' 1378/// 'wchar_t' 1379/// 'bool' 1380/// 'short' 1381/// 'int' 1382/// 'long' 1383/// 'signed' 1384/// 'unsigned' 1385/// 'float' 1386/// 'double' 1387/// 'void' 1388/// [C99] '_Bool' 1389/// [C99] '_Complex' 1390/// [C99] '_Imaginary' // Removed in TC2? 1391/// [GNU] '_Decimal32' 1392/// [GNU] '_Decimal64' 1393/// [GNU] '_Decimal128' 1394/// [GNU] typeof-specifier 1395/// [OBJC] class-name objc-protocol-refs[opt] [TODO] 1396/// [OBJC] typedef-name objc-protocol-refs[opt] [TODO] 1397/// [C++0x] 'decltype' ( expression ) 1398bool Parser::ParseOptionalTypeSpecifier(DeclSpec &DS, bool& isInvalid, 1399 const char *&PrevSpec, 1400 unsigned &DiagID, 1401 const ParsedTemplateInfo &TemplateInfo) { 1402 SourceLocation Loc = Tok.getLocation(); 1403 1404 switch (Tok.getKind()) { 1405 case tok::identifier: // foo::bar 1406 case tok::kw_typename: // typename foo::bar 1407 // Annotate typenames and C++ scope specifiers. If we get one, just 1408 // recurse to handle whatever we get. 1409 if (TryAnnotateTypeOrScopeToken()) 1410 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID, 1411 TemplateInfo); 1412 // Otherwise, not a type specifier. 1413 return false; 1414 case tok::coloncolon: // ::foo::bar 1415 if (NextToken().is(tok::kw_new) || // ::new 1416 NextToken().is(tok::kw_delete)) // ::delete 1417 return false; 1418 1419 // Annotate typenames and C++ scope specifiers. If we get one, just 1420 // recurse to handle whatever we get. 1421 if (TryAnnotateTypeOrScopeToken()) 1422 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID, 1423 TemplateInfo); 1424 // Otherwise, not a type specifier. 1425 return false; 1426 1427 // simple-type-specifier: 1428 case tok::annot_typename: { 1429 if (Tok.getAnnotationValue()) 1430 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1431 DiagID, Tok.getAnnotationValue()); 1432 else 1433 DS.SetTypeSpecError(); 1434 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 1435 ConsumeToken(); // The typename 1436 1437 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1438 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1439 // Objective-C interface. If we don't have Objective-C or a '<', this is 1440 // just a normal reference to a typedef name. 1441 if (!Tok.is(tok::less) || !getLang().ObjC1) 1442 return true; 1443 1444 SourceLocation LAngleLoc, EndProtoLoc; 1445 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1446 llvm::SmallVector<SourceLocation, 8> ProtocolLocs; 1447 ParseObjCProtocolReferences(ProtocolDecl, ProtocolLocs, false, 1448 LAngleLoc, EndProtoLoc); 1449 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size(), 1450 ProtocolLocs.data(), LAngleLoc); 1451 1452 DS.SetRangeEnd(EndProtoLoc); 1453 return true; 1454 } 1455 1456 case tok::kw_short: 1457 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, DiagID); 1458 break; 1459 case tok::kw_long: 1460 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long) 1461 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, 1462 DiagID); 1463 else 1464 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 1465 DiagID); 1466 break; 1467 case tok::kw_signed: 1468 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, DiagID); 1469 break; 1470 case tok::kw_unsigned: 1471 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, 1472 DiagID); 1473 break; 1474 case tok::kw__Complex: 1475 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec, 1476 DiagID); 1477 break; 1478 case tok::kw__Imaginary: 1479 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec, 1480 DiagID); 1481 break; 1482 case tok::kw_void: 1483 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, DiagID); 1484 break; 1485 case tok::kw_char: 1486 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, DiagID); 1487 break; 1488 case tok::kw_int: 1489 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, DiagID); 1490 break; 1491 case tok::kw_float: 1492 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, DiagID); 1493 break; 1494 case tok::kw_double: 1495 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, DiagID); 1496 break; 1497 case tok::kw_wchar_t: 1498 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, DiagID); 1499 break; 1500 case tok::kw_char16_t: 1501 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, DiagID); 1502 break; 1503 case tok::kw_char32_t: 1504 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, DiagID); 1505 break; 1506 case tok::kw_bool: 1507 case tok::kw__Bool: 1508 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, DiagID); 1509 break; 1510 case tok::kw__Decimal32: 1511 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec, 1512 DiagID); 1513 break; 1514 case tok::kw__Decimal64: 1515 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec, 1516 DiagID); 1517 break; 1518 case tok::kw__Decimal128: 1519 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec, 1520 DiagID); 1521 break; 1522 1523 // class-specifier: 1524 case tok::kw_class: 1525 case tok::kw_struct: 1526 case tok::kw_union: { 1527 tok::TokenKind Kind = Tok.getKind(); 1528 ConsumeToken(); 1529 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo); 1530 return true; 1531 } 1532 1533 // enum-specifier: 1534 case tok::kw_enum: 1535 ConsumeToken(); 1536 ParseEnumSpecifier(Loc, DS); 1537 return true; 1538 1539 // cv-qualifier: 1540 case tok::kw_const: 1541 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, 1542 DiagID, getLang()); 1543 break; 1544 case tok::kw_volatile: 1545 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, 1546 DiagID, getLang()); 1547 break; 1548 case tok::kw_restrict: 1549 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, 1550 DiagID, getLang()); 1551 break; 1552 1553 // GNU typeof support. 1554 case tok::kw_typeof: 1555 ParseTypeofSpecifier(DS); 1556 return true; 1557 1558 // C++0x decltype support. 1559 case tok::kw_decltype: 1560 ParseDecltypeSpecifier(DS); 1561 return true; 1562 1563 // C++0x auto support. 1564 case tok::kw_auto: 1565 if (!getLang().CPlusPlus0x) 1566 return false; 1567 1568 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, DiagID); 1569 break; 1570 case tok::kw___ptr64: 1571 case tok::kw___w64: 1572 case tok::kw___cdecl: 1573 case tok::kw___stdcall: 1574 case tok::kw___fastcall: 1575 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 1576 return true; 1577 1578 default: 1579 // Not a type-specifier; do nothing. 1580 return false; 1581 } 1582 1583 // If the specifier combination wasn't legal, issue a diagnostic. 1584 if (isInvalid) { 1585 assert(PrevSpec && "Method did not return previous specifier!"); 1586 // Pick between error or extwarn. 1587 Diag(Tok, DiagID) << PrevSpec; 1588 } 1589 DS.SetRangeEnd(Tok.getLocation()); 1590 ConsumeToken(); // whatever we parsed above. 1591 return true; 1592} 1593 1594/// ParseStructDeclaration - Parse a struct declaration without the terminating 1595/// semicolon. 1596/// 1597/// struct-declaration: 1598/// specifier-qualifier-list struct-declarator-list 1599/// [GNU] __extension__ struct-declaration 1600/// [GNU] specifier-qualifier-list 1601/// struct-declarator-list: 1602/// struct-declarator 1603/// struct-declarator-list ',' struct-declarator 1604/// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator 1605/// struct-declarator: 1606/// declarator 1607/// [GNU] declarator attributes[opt] 1608/// declarator[opt] ':' constant-expression 1609/// [GNU] declarator[opt] ':' constant-expression attributes[opt] 1610/// 1611void Parser:: 1612ParseStructDeclaration(DeclSpec &DS, FieldCallback &Fields) { 1613 if (Tok.is(tok::kw___extension__)) { 1614 // __extension__ silences extension warnings in the subexpression. 1615 ExtensionRAIIObject O(Diags); // Use RAII to do this. 1616 ConsumeToken(); 1617 return ParseStructDeclaration(DS, Fields); 1618 } 1619 1620 // Parse the common specifier-qualifiers-list piece. 1621 SourceLocation DSStart = Tok.getLocation(); 1622 ParseSpecifierQualifierList(DS); 1623 1624 // If there are no declarators, this is a free-standing declaration 1625 // specifier. Let the actions module cope with it. 1626 if (Tok.is(tok::semi)) { 1627 Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 1628 return; 1629 } 1630 1631 // Read struct-declarators until we find the semicolon. 1632 bool FirstDeclarator = true; 1633 while (1) { 1634 ParsingDeclRAIIObject PD(*this); 1635 FieldDeclarator DeclaratorInfo(DS); 1636 1637 // Attributes are only allowed here on successive declarators. 1638 if (!FirstDeclarator && Tok.is(tok::kw___attribute)) { 1639 SourceLocation Loc; 1640 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1641 DeclaratorInfo.D.AddAttributes(AttrList, Loc); 1642 } 1643 1644 /// struct-declarator: declarator 1645 /// struct-declarator: declarator[opt] ':' constant-expression 1646 if (Tok.isNot(tok::colon)) { 1647 // Don't parse FOO:BAR as if it were a typo for FOO::BAR. 1648 ColonProtectionRAIIObject X(*this); 1649 ParseDeclarator(DeclaratorInfo.D); 1650 } 1651 1652 if (Tok.is(tok::colon)) { 1653 ConsumeToken(); 1654 OwningExprResult Res(ParseConstantExpression()); 1655 if (Res.isInvalid()) 1656 SkipUntil(tok::semi, true, true); 1657 else 1658 DeclaratorInfo.BitfieldSize = Res.release(); 1659 } 1660 1661 // If attributes exist after the declarator, parse them. 1662 if (Tok.is(tok::kw___attribute)) { 1663 SourceLocation Loc; 1664 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1665 DeclaratorInfo.D.AddAttributes(AttrList, Loc); 1666 } 1667 1668 // We're done with this declarator; invoke the callback. 1669 DeclPtrTy D = Fields.invoke(DeclaratorInfo); 1670 PD.complete(D); 1671 1672 // If we don't have a comma, it is either the end of the list (a ';') 1673 // or an error, bail out. 1674 if (Tok.isNot(tok::comma)) 1675 return; 1676 1677 // Consume the comma. 1678 ConsumeToken(); 1679 1680 FirstDeclarator = false; 1681 } 1682} 1683 1684/// ParseStructUnionBody 1685/// struct-contents: 1686/// struct-declaration-list 1687/// [EXT] empty 1688/// [GNU] "struct-declaration-list" without terminatoring ';' 1689/// struct-declaration-list: 1690/// struct-declaration 1691/// struct-declaration-list struct-declaration 1692/// [OBC] '@' 'defs' '(' class-name ')' 1693/// 1694void Parser::ParseStructUnionBody(SourceLocation RecordLoc, 1695 unsigned TagType, DeclPtrTy TagDecl) { 1696 PrettyStackTraceActionsDecl CrashInfo(TagDecl, RecordLoc, Actions, 1697 PP.getSourceManager(), 1698 "parsing struct/union body"); 1699 1700 SourceLocation LBraceLoc = ConsumeBrace(); 1701 1702 ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope); 1703 Actions.ActOnTagStartDefinition(CurScope, TagDecl); 1704 1705 // Empty structs are an extension in C (C99 6.7.2.1p7), but are allowed in 1706 // C++. 1707 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus) 1708 Diag(Tok, diag::ext_empty_struct_union_enum) 1709 << DeclSpec::getSpecifierName((DeclSpec::TST)TagType); 1710 1711 llvm::SmallVector<DeclPtrTy, 32> FieldDecls; 1712 1713 // While we still have something to read, read the declarations in the struct. 1714 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 1715 // Each iteration of this loop reads one struct-declaration. 1716 1717 // Check for extraneous top-level semicolon. 1718 if (Tok.is(tok::semi)) { 1719 Diag(Tok, diag::ext_extra_struct_semi) 1720 << CodeModificationHint::CreateRemoval(Tok.getLocation()); 1721 ConsumeToken(); 1722 continue; 1723 } 1724 1725 // Parse all the comma separated declarators. 1726 DeclSpec DS; 1727 1728 if (!Tok.is(tok::at)) { 1729 struct CFieldCallback : FieldCallback { 1730 Parser &P; 1731 DeclPtrTy TagDecl; 1732 llvm::SmallVectorImpl<DeclPtrTy> &FieldDecls; 1733 1734 CFieldCallback(Parser &P, DeclPtrTy TagDecl, 1735 llvm::SmallVectorImpl<DeclPtrTy> &FieldDecls) : 1736 P(P), TagDecl(TagDecl), FieldDecls(FieldDecls) {} 1737 1738 virtual DeclPtrTy invoke(FieldDeclarator &FD) { 1739 // Install the declarator into the current TagDecl. 1740 DeclPtrTy Field = P.Actions.ActOnField(P.CurScope, TagDecl, 1741 FD.D.getDeclSpec().getSourceRange().getBegin(), 1742 FD.D, FD.BitfieldSize); 1743 FieldDecls.push_back(Field); 1744 return Field; 1745 } 1746 } Callback(*this, TagDecl, FieldDecls); 1747 1748 ParseStructDeclaration(DS, Callback); 1749 } else { // Handle @defs 1750 ConsumeToken(); 1751 if (!Tok.isObjCAtKeyword(tok::objc_defs)) { 1752 Diag(Tok, diag::err_unexpected_at); 1753 SkipUntil(tok::semi, true); 1754 continue; 1755 } 1756 ConsumeToken(); 1757 ExpectAndConsume(tok::l_paren, diag::err_expected_lparen); 1758 if (!Tok.is(tok::identifier)) { 1759 Diag(Tok, diag::err_expected_ident); 1760 SkipUntil(tok::semi, true); 1761 continue; 1762 } 1763 llvm::SmallVector<DeclPtrTy, 16> Fields; 1764 Actions.ActOnDefs(CurScope, TagDecl, Tok.getLocation(), 1765 Tok.getIdentifierInfo(), Fields); 1766 FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end()); 1767 ConsumeToken(); 1768 ExpectAndConsume(tok::r_paren, diag::err_expected_rparen); 1769 } 1770 1771 if (Tok.is(tok::semi)) { 1772 ConsumeToken(); 1773 } else if (Tok.is(tok::r_brace)) { 1774 ExpectAndConsume(tok::semi, diag::ext_expected_semi_decl_list); 1775 break; 1776 } else { 1777 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list); 1778 // Skip to end of block or statement to avoid ext-warning on extra ';'. 1779 SkipUntil(tok::r_brace, true, true); 1780 // If we stopped at a ';', eat it. 1781 if (Tok.is(tok::semi)) ConsumeToken(); 1782 } 1783 } 1784 1785 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 1786 1787 AttributeList *AttrList = 0; 1788 // If attributes exist after struct contents, parse them. 1789 if (Tok.is(tok::kw___attribute)) 1790 AttrList = ParseGNUAttributes(); 1791 1792 Actions.ActOnFields(CurScope, 1793 RecordLoc, TagDecl, FieldDecls.data(), FieldDecls.size(), 1794 LBraceLoc, RBraceLoc, 1795 AttrList); 1796 StructScope.Exit(); 1797 Actions.ActOnTagFinishDefinition(CurScope, TagDecl, RBraceLoc); 1798} 1799 1800 1801/// ParseEnumSpecifier 1802/// enum-specifier: [C99 6.7.2.2] 1803/// 'enum' identifier[opt] '{' enumerator-list '}' 1804///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}' 1805/// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt] 1806/// '}' attributes[opt] 1807/// 'enum' identifier 1808/// [GNU] 'enum' attributes[opt] identifier 1809/// 1810/// [C++] elaborated-type-specifier: 1811/// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier 1812/// 1813void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS, 1814 AccessSpecifier AS) { 1815 // Parse the tag portion of this. 1816 if (Tok.is(tok::code_completion)) { 1817 // Code completion for an enum name. 1818 Actions.CodeCompleteTag(CurScope, DeclSpec::TST_enum); 1819 ConsumeToken(); 1820 } 1821 1822 AttributeList *Attr = 0; 1823 // If attributes exist after tag, parse them. 1824 if (Tok.is(tok::kw___attribute)) 1825 Attr = ParseGNUAttributes(); 1826 1827 CXXScopeSpec SS; 1828 if (getLang().CPlusPlus && ParseOptionalCXXScopeSpecifier(SS, 0, false)) { 1829 if (Tok.isNot(tok::identifier)) { 1830 Diag(Tok, diag::err_expected_ident); 1831 if (Tok.isNot(tok::l_brace)) { 1832 // Has no name and is not a definition. 1833 // Skip the rest of this declarator, up until the comma or semicolon. 1834 SkipUntil(tok::comma, true); 1835 return; 1836 } 1837 } 1838 } 1839 1840 // Must have either 'enum name' or 'enum {...}'. 1841 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace)) { 1842 Diag(Tok, diag::err_expected_ident_lbrace); 1843 1844 // Skip the rest of this declarator, up until the comma or semicolon. 1845 SkipUntil(tok::comma, true); 1846 return; 1847 } 1848 1849 // If an identifier is present, consume and remember it. 1850 IdentifierInfo *Name = 0; 1851 SourceLocation NameLoc; 1852 if (Tok.is(tok::identifier)) { 1853 Name = Tok.getIdentifierInfo(); 1854 NameLoc = ConsumeToken(); 1855 } 1856 1857 // There are three options here. If we have 'enum foo;', then this is a 1858 // forward declaration. If we have 'enum foo {...' then this is a 1859 // definition. Otherwise we have something like 'enum foo xyz', a reference. 1860 // 1861 // This is needed to handle stuff like this right (C99 6.7.2.3p11): 1862 // enum foo {..}; void bar() { enum foo; } <- new foo in bar. 1863 // enum foo {..}; void bar() { enum foo x; } <- use of old foo. 1864 // 1865 Action::TagUseKind TUK; 1866 if (Tok.is(tok::l_brace)) 1867 TUK = Action::TUK_Definition; 1868 else if (Tok.is(tok::semi)) 1869 TUK = Action::TUK_Declaration; 1870 else 1871 TUK = Action::TUK_Reference; 1872 bool Owned = false; 1873 bool IsDependent = false; 1874 DeclPtrTy TagDecl = Actions.ActOnTag(CurScope, DeclSpec::TST_enum, TUK, 1875 StartLoc, SS, Name, NameLoc, Attr, AS, 1876 Action::MultiTemplateParamsArg(Actions), 1877 Owned, IsDependent); 1878 assert(!IsDependent && "didn't expect dependent enum"); 1879 1880 if (Tok.is(tok::l_brace)) 1881 ParseEnumBody(StartLoc, TagDecl); 1882 1883 // FIXME: The DeclSpec should keep the locations of both the keyword and the 1884 // name (if there is one). 1885 SourceLocation TSTLoc = NameLoc.isValid()? NameLoc : StartLoc; 1886 const char *PrevSpec = 0; 1887 unsigned DiagID; 1888 if (DS.SetTypeSpecType(DeclSpec::TST_enum, TSTLoc, PrevSpec, DiagID, 1889 TagDecl.getAs<void>(), Owned)) 1890 Diag(StartLoc, DiagID) << PrevSpec; 1891} 1892 1893/// ParseEnumBody - Parse a {} enclosed enumerator-list. 1894/// enumerator-list: 1895/// enumerator 1896/// enumerator-list ',' enumerator 1897/// enumerator: 1898/// enumeration-constant 1899/// enumeration-constant '=' constant-expression 1900/// enumeration-constant: 1901/// identifier 1902/// 1903void Parser::ParseEnumBody(SourceLocation StartLoc, DeclPtrTy EnumDecl) { 1904 // Enter the scope of the enum body and start the definition. 1905 ParseScope EnumScope(this, Scope::DeclScope); 1906 Actions.ActOnTagStartDefinition(CurScope, EnumDecl); 1907 1908 SourceLocation LBraceLoc = ConsumeBrace(); 1909 1910 // C does not allow an empty enumerator-list, C++ does [dcl.enum]. 1911 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus) 1912 Diag(Tok, diag::ext_empty_struct_union_enum) << "enum"; 1913 1914 llvm::SmallVector<DeclPtrTy, 32> EnumConstantDecls; 1915 1916 DeclPtrTy LastEnumConstDecl; 1917 1918 // Parse the enumerator-list. 1919 while (Tok.is(tok::identifier)) { 1920 IdentifierInfo *Ident = Tok.getIdentifierInfo(); 1921 SourceLocation IdentLoc = ConsumeToken(); 1922 1923 SourceLocation EqualLoc; 1924 OwningExprResult AssignedVal(Actions); 1925 if (Tok.is(tok::equal)) { 1926 EqualLoc = ConsumeToken(); 1927 AssignedVal = ParseConstantExpression(); 1928 if (AssignedVal.isInvalid()) 1929 SkipUntil(tok::comma, tok::r_brace, true, true); 1930 } 1931 1932 // Install the enumerator constant into EnumDecl. 1933 DeclPtrTy EnumConstDecl = Actions.ActOnEnumConstant(CurScope, EnumDecl, 1934 LastEnumConstDecl, 1935 IdentLoc, Ident, 1936 EqualLoc, 1937 AssignedVal.release()); 1938 EnumConstantDecls.push_back(EnumConstDecl); 1939 LastEnumConstDecl = EnumConstDecl; 1940 1941 if (Tok.isNot(tok::comma)) 1942 break; 1943 SourceLocation CommaLoc = ConsumeToken(); 1944 1945 if (Tok.isNot(tok::identifier) && 1946 !(getLang().C99 || getLang().CPlusPlus0x)) 1947 Diag(CommaLoc, diag::ext_enumerator_list_comma) 1948 << getLang().CPlusPlus 1949 << CodeModificationHint::CreateRemoval(CommaLoc); 1950 } 1951 1952 // Eat the }. 1953 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 1954 1955 AttributeList *Attr = 0; 1956 // If attributes exist after the identifier list, parse them. 1957 if (Tok.is(tok::kw___attribute)) 1958 Attr = ParseGNUAttributes(); // FIXME: where do they do? 1959 1960 Actions.ActOnEnumBody(StartLoc, LBraceLoc, RBraceLoc, EnumDecl, 1961 EnumConstantDecls.data(), EnumConstantDecls.size(), 1962 CurScope, Attr); 1963 1964 EnumScope.Exit(); 1965 Actions.ActOnTagFinishDefinition(CurScope, EnumDecl, RBraceLoc); 1966} 1967 1968/// isTypeSpecifierQualifier - Return true if the current token could be the 1969/// start of a type-qualifier-list. 1970bool Parser::isTypeQualifier() const { 1971 switch (Tok.getKind()) { 1972 default: return false; 1973 // type-qualifier 1974 case tok::kw_const: 1975 case tok::kw_volatile: 1976 case tok::kw_restrict: 1977 return true; 1978 } 1979} 1980 1981/// isTypeSpecifierQualifier - Return true if the current token could be the 1982/// start of a specifier-qualifier-list. 1983bool Parser::isTypeSpecifierQualifier() { 1984 switch (Tok.getKind()) { 1985 default: return false; 1986 1987 case tok::identifier: // foo::bar 1988 case tok::kw_typename: // typename T::type 1989 // Annotate typenames and C++ scope specifiers. If we get one, just 1990 // recurse to handle whatever we get. 1991 if (TryAnnotateTypeOrScopeToken()) 1992 return isTypeSpecifierQualifier(); 1993 // Otherwise, not a type specifier. 1994 return false; 1995 1996 case tok::coloncolon: // ::foo::bar 1997 if (NextToken().is(tok::kw_new) || // ::new 1998 NextToken().is(tok::kw_delete)) // ::delete 1999 return false; 2000 2001 // Annotate typenames and C++ scope specifiers. If we get one, just 2002 // recurse to handle whatever we get. 2003 if (TryAnnotateTypeOrScopeToken()) 2004 return isTypeSpecifierQualifier(); 2005 // Otherwise, not a type specifier. 2006 return false; 2007 2008 // GNU attributes support. 2009 case tok::kw___attribute: 2010 // GNU typeof support. 2011 case tok::kw_typeof: 2012 2013 // type-specifiers 2014 case tok::kw_short: 2015 case tok::kw_long: 2016 case tok::kw_signed: 2017 case tok::kw_unsigned: 2018 case tok::kw__Complex: 2019 case tok::kw__Imaginary: 2020 case tok::kw_void: 2021 case tok::kw_char: 2022 case tok::kw_wchar_t: 2023 case tok::kw_char16_t: 2024 case tok::kw_char32_t: 2025 case tok::kw_int: 2026 case tok::kw_float: 2027 case tok::kw_double: 2028 case tok::kw_bool: 2029 case tok::kw__Bool: 2030 case tok::kw__Decimal32: 2031 case tok::kw__Decimal64: 2032 case tok::kw__Decimal128: 2033 2034 // struct-or-union-specifier (C99) or class-specifier (C++) 2035 case tok::kw_class: 2036 case tok::kw_struct: 2037 case tok::kw_union: 2038 // enum-specifier 2039 case tok::kw_enum: 2040 2041 // type-qualifier 2042 case tok::kw_const: 2043 case tok::kw_volatile: 2044 case tok::kw_restrict: 2045 2046 // typedef-name 2047 case tok::annot_typename: 2048 return true; 2049 2050 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'. 2051 case tok::less: 2052 return getLang().ObjC1; 2053 2054 case tok::kw___cdecl: 2055 case tok::kw___stdcall: 2056 case tok::kw___fastcall: 2057 case tok::kw___w64: 2058 case tok::kw___ptr64: 2059 return true; 2060 } 2061} 2062 2063/// isDeclarationSpecifier() - Return true if the current token is part of a 2064/// declaration specifier. 2065bool Parser::isDeclarationSpecifier() { 2066 switch (Tok.getKind()) { 2067 default: return false; 2068 2069 case tok::identifier: // foo::bar 2070 // Unfortunate hack to support "Class.factoryMethod" notation. 2071 if (getLang().ObjC1 && NextToken().is(tok::period)) 2072 return false; 2073 // Fall through 2074 2075 case tok::kw_typename: // typename T::type 2076 // Annotate typenames and C++ scope specifiers. If we get one, just 2077 // recurse to handle whatever we get. 2078 if (TryAnnotateTypeOrScopeToken()) 2079 return isDeclarationSpecifier(); 2080 // Otherwise, not a declaration specifier. 2081 return false; 2082 case tok::coloncolon: // ::foo::bar 2083 if (NextToken().is(tok::kw_new) || // ::new 2084 NextToken().is(tok::kw_delete)) // ::delete 2085 return false; 2086 2087 // Annotate typenames and C++ scope specifiers. If we get one, just 2088 // recurse to handle whatever we get. 2089 if (TryAnnotateTypeOrScopeToken()) 2090 return isDeclarationSpecifier(); 2091 // Otherwise, not a declaration specifier. 2092 return false; 2093 2094 // storage-class-specifier 2095 case tok::kw_typedef: 2096 case tok::kw_extern: 2097 case tok::kw___private_extern__: 2098 case tok::kw_static: 2099 case tok::kw_auto: 2100 case tok::kw_register: 2101 case tok::kw___thread: 2102 2103 // type-specifiers 2104 case tok::kw_short: 2105 case tok::kw_long: 2106 case tok::kw_signed: 2107 case tok::kw_unsigned: 2108 case tok::kw__Complex: 2109 case tok::kw__Imaginary: 2110 case tok::kw_void: 2111 case tok::kw_char: 2112 case tok::kw_wchar_t: 2113 case tok::kw_char16_t: 2114 case tok::kw_char32_t: 2115 2116 case tok::kw_int: 2117 case tok::kw_float: 2118 case tok::kw_double: 2119 case tok::kw_bool: 2120 case tok::kw__Bool: 2121 case tok::kw__Decimal32: 2122 case tok::kw__Decimal64: 2123 case tok::kw__Decimal128: 2124 2125 // struct-or-union-specifier (C99) or class-specifier (C++) 2126 case tok::kw_class: 2127 case tok::kw_struct: 2128 case tok::kw_union: 2129 // enum-specifier 2130 case tok::kw_enum: 2131 2132 // type-qualifier 2133 case tok::kw_const: 2134 case tok::kw_volatile: 2135 case tok::kw_restrict: 2136 2137 // function-specifier 2138 case tok::kw_inline: 2139 case tok::kw_virtual: 2140 case tok::kw_explicit: 2141 2142 // typedef-name 2143 case tok::annot_typename: 2144 2145 // GNU typeof support. 2146 case tok::kw_typeof: 2147 2148 // GNU attributes. 2149 case tok::kw___attribute: 2150 return true; 2151 2152 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'. 2153 case tok::less: 2154 return getLang().ObjC1; 2155 2156 case tok::kw___declspec: 2157 case tok::kw___cdecl: 2158 case tok::kw___stdcall: 2159 case tok::kw___fastcall: 2160 case tok::kw___w64: 2161 case tok::kw___ptr64: 2162 case tok::kw___forceinline: 2163 return true; 2164 } 2165} 2166 2167bool Parser::isConstructorDeclarator() { 2168 TentativeParsingAction TPA(*this); 2169 2170 // Parse the C++ scope specifier. 2171 CXXScopeSpec SS; 2172 ParseOptionalCXXScopeSpecifier(SS, 0, true); 2173 2174 // Parse the constructor name. 2175 if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id)) { 2176 // We already know that we have a constructor name; just consume 2177 // the token. 2178 ConsumeToken(); 2179 } else { 2180 TPA.Revert(); 2181 return false; 2182 } 2183 2184 // Current class name must be followed by a left parentheses. 2185 if (Tok.isNot(tok::l_paren)) { 2186 TPA.Revert(); 2187 return false; 2188 } 2189 ConsumeParen(); 2190 2191 // A right parentheses or ellipsis signals that we have a constructor. 2192 if (Tok.is(tok::r_paren) || Tok.is(tok::ellipsis)) { 2193 TPA.Revert(); 2194 return true; 2195 } 2196 2197 // If we need to, enter the specified scope. 2198 DeclaratorScopeObj DeclScopeObj(*this, SS); 2199 if (SS.isSet() && Actions.ShouldEnterDeclaratorScope(CurScope, SS)) 2200 DeclScopeObj.EnterDeclaratorScope(); 2201 2202 // Check whether the next token(s) are part of a declaration 2203 // specifier, in which case we have the start of a parameter and, 2204 // therefore, we know that this is a constructor. 2205 bool IsConstructor = isDeclarationSpecifier(); 2206 TPA.Revert(); 2207 return IsConstructor; 2208} 2209 2210/// ParseTypeQualifierListOpt 2211/// type-qualifier-list: [C99 6.7.5] 2212/// type-qualifier 2213/// [GNU] attributes [ only if AttributesAllowed=true ] 2214/// type-qualifier-list type-qualifier 2215/// [GNU] type-qualifier-list attributes [ only if AttributesAllowed=true ] 2216/// [C++0x] attribute-specifier[opt] is allowed before cv-qualifier-seq 2217/// if CXX0XAttributesAllowed = true 2218/// 2219void Parser::ParseTypeQualifierListOpt(DeclSpec &DS, bool GNUAttributesAllowed, 2220 bool CXX0XAttributesAllowed) { 2221 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 2222 SourceLocation Loc = Tok.getLocation(); 2223 CXX0XAttributeList Attr = ParseCXX0XAttributes(); 2224 if (CXX0XAttributesAllowed) 2225 DS.AddAttributes(Attr.AttrList); 2226 else 2227 Diag(Loc, diag::err_attributes_not_allowed); 2228 } 2229 2230 while (1) { 2231 bool isInvalid = false; 2232 const char *PrevSpec = 0; 2233 unsigned DiagID = 0; 2234 SourceLocation Loc = Tok.getLocation(); 2235 2236 switch (Tok.getKind()) { 2237 case tok::kw_const: 2238 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, DiagID, 2239 getLang()); 2240 break; 2241 case tok::kw_volatile: 2242 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID, 2243 getLang()); 2244 break; 2245 case tok::kw_restrict: 2246 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID, 2247 getLang()); 2248 break; 2249 case tok::kw___w64: 2250 case tok::kw___ptr64: 2251 case tok::kw___cdecl: 2252 case tok::kw___stdcall: 2253 case tok::kw___fastcall: 2254 if (GNUAttributesAllowed) { 2255 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 2256 continue; 2257 } 2258 goto DoneWithTypeQuals; 2259 case tok::kw___attribute: 2260 if (GNUAttributesAllowed) { 2261 DS.AddAttributes(ParseGNUAttributes()); 2262 continue; // do *not* consume the next token! 2263 } 2264 // otherwise, FALL THROUGH! 2265 default: 2266 DoneWithTypeQuals: 2267 // If this is not a type-qualifier token, we're done reading type 2268 // qualifiers. First verify that DeclSpec's are consistent. 2269 DS.Finish(Diags, PP); 2270 return; 2271 } 2272 2273 // If the specifier combination wasn't legal, issue a diagnostic. 2274 if (isInvalid) { 2275 assert(PrevSpec && "Method did not return previous specifier!"); 2276 Diag(Tok, DiagID) << PrevSpec; 2277 } 2278 ConsumeToken(); 2279 } 2280} 2281 2282 2283/// ParseDeclarator - Parse and verify a newly-initialized declarator. 2284/// 2285void Parser::ParseDeclarator(Declarator &D) { 2286 /// This implements the 'declarator' production in the C grammar, then checks 2287 /// for well-formedness and issues diagnostics. 2288 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator); 2289} 2290 2291/// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator 2292/// is parsed by the function passed to it. Pass null, and the direct-declarator 2293/// isn't parsed at all, making this function effectively parse the C++ 2294/// ptr-operator production. 2295/// 2296/// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl] 2297/// [C] pointer[opt] direct-declarator 2298/// [C++] direct-declarator 2299/// [C++] ptr-operator declarator 2300/// 2301/// pointer: [C99 6.7.5] 2302/// '*' type-qualifier-list[opt] 2303/// '*' type-qualifier-list[opt] pointer 2304/// 2305/// ptr-operator: 2306/// '*' cv-qualifier-seq[opt] 2307/// '&' 2308/// [C++0x] '&&' 2309/// [GNU] '&' restrict[opt] attributes[opt] 2310/// [GNU?] '&&' restrict[opt] attributes[opt] 2311/// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt] 2312void Parser::ParseDeclaratorInternal(Declarator &D, 2313 DirectDeclParseFunction DirectDeclParser) { 2314 if (Diags.hasAllExtensionsSilenced()) 2315 D.setExtension(); 2316 // C++ member pointers start with a '::' or a nested-name. 2317 // Member pointers get special handling, since there's no place for the 2318 // scope spec in the generic path below. 2319 if (getLang().CPlusPlus && 2320 (Tok.is(tok::coloncolon) || Tok.is(tok::identifier) || 2321 Tok.is(tok::annot_cxxscope))) { 2322 CXXScopeSpec SS; 2323 if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, true)) { 2324 if (Tok.isNot(tok::star)) { 2325 // The scope spec really belongs to the direct-declarator. 2326 D.getCXXScopeSpec() = SS; 2327 if (DirectDeclParser) 2328 (this->*DirectDeclParser)(D); 2329 return; 2330 } 2331 2332 SourceLocation Loc = ConsumeToken(); 2333 D.SetRangeEnd(Loc); 2334 DeclSpec DS; 2335 ParseTypeQualifierListOpt(DS); 2336 D.ExtendWithDeclSpec(DS); 2337 2338 // Recurse to parse whatever is left. 2339 ParseDeclaratorInternal(D, DirectDeclParser); 2340 2341 // Sema will have to catch (syntactically invalid) pointers into global 2342 // scope. It has to catch pointers into namespace scope anyway. 2343 D.AddTypeInfo(DeclaratorChunk::getMemberPointer(SS,DS.getTypeQualifiers(), 2344 Loc, DS.TakeAttributes()), 2345 /* Don't replace range end. */SourceLocation()); 2346 return; 2347 } 2348 } 2349 2350 tok::TokenKind Kind = Tok.getKind(); 2351 // Not a pointer, C++ reference, or block. 2352 if (Kind != tok::star && Kind != tok::caret && 2353 (Kind != tok::amp || !getLang().CPlusPlus) && 2354 // We parse rvalue refs in C++03, because otherwise the errors are scary. 2355 (Kind != tok::ampamp || !getLang().CPlusPlus)) { 2356 if (DirectDeclParser) 2357 (this->*DirectDeclParser)(D); 2358 return; 2359 } 2360 2361 // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference, 2362 // '&&' -> rvalue reference 2363 SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&. 2364 D.SetRangeEnd(Loc); 2365 2366 if (Kind == tok::star || Kind == tok::caret) { 2367 // Is a pointer. 2368 DeclSpec DS; 2369 2370 ParseTypeQualifierListOpt(DS); 2371 D.ExtendWithDeclSpec(DS); 2372 2373 // Recursively parse the declarator. 2374 ParseDeclaratorInternal(D, DirectDeclParser); 2375 if (Kind == tok::star) 2376 // Remember that we parsed a pointer type, and remember the type-quals. 2377 D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc, 2378 DS.TakeAttributes()), 2379 SourceLocation()); 2380 else 2381 // Remember that we parsed a Block type, and remember the type-quals. 2382 D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(), 2383 Loc, DS.TakeAttributes()), 2384 SourceLocation()); 2385 } else { 2386 // Is a reference 2387 DeclSpec DS; 2388 2389 // Complain about rvalue references in C++03, but then go on and build 2390 // the declarator. 2391 if (Kind == tok::ampamp && !getLang().CPlusPlus0x) 2392 Diag(Loc, diag::err_rvalue_reference); 2393 2394 // C++ 8.3.2p1: cv-qualified references are ill-formed except when the 2395 // cv-qualifiers are introduced through the use of a typedef or of a 2396 // template type argument, in which case the cv-qualifiers are ignored. 2397 // 2398 // [GNU] Retricted references are allowed. 2399 // [GNU] Attributes on references are allowed. 2400 // [C++0x] Attributes on references are not allowed. 2401 ParseTypeQualifierListOpt(DS, true, false); 2402 D.ExtendWithDeclSpec(DS); 2403 2404 if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) { 2405 if (DS.getTypeQualifiers() & DeclSpec::TQ_const) 2406 Diag(DS.getConstSpecLoc(), 2407 diag::err_invalid_reference_qualifier_application) << "const"; 2408 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) 2409 Diag(DS.getVolatileSpecLoc(), 2410 diag::err_invalid_reference_qualifier_application) << "volatile"; 2411 } 2412 2413 // Recursively parse the declarator. 2414 ParseDeclaratorInternal(D, DirectDeclParser); 2415 2416 if (D.getNumTypeObjects() > 0) { 2417 // C++ [dcl.ref]p4: There shall be no references to references. 2418 DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1); 2419 if (InnerChunk.Kind == DeclaratorChunk::Reference) { 2420 if (const IdentifierInfo *II = D.getIdentifier()) 2421 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference) 2422 << II; 2423 else 2424 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference) 2425 << "type name"; 2426 2427 // Once we've complained about the reference-to-reference, we 2428 // can go ahead and build the (technically ill-formed) 2429 // declarator: reference collapsing will take care of it. 2430 } 2431 } 2432 2433 // Remember that we parsed a reference type. It doesn't have type-quals. 2434 D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc, 2435 DS.TakeAttributes(), 2436 Kind == tok::amp), 2437 SourceLocation()); 2438 } 2439} 2440 2441/// ParseDirectDeclarator 2442/// direct-declarator: [C99 6.7.5] 2443/// [C99] identifier 2444/// '(' declarator ')' 2445/// [GNU] '(' attributes declarator ')' 2446/// [C90] direct-declarator '[' constant-expression[opt] ']' 2447/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']' 2448/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']' 2449/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']' 2450/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']' 2451/// direct-declarator '(' parameter-type-list ')' 2452/// direct-declarator '(' identifier-list[opt] ')' 2453/// [GNU] direct-declarator '(' parameter-forward-declarations 2454/// parameter-type-list[opt] ')' 2455/// [C++] direct-declarator '(' parameter-declaration-clause ')' 2456/// cv-qualifier-seq[opt] exception-specification[opt] 2457/// [C++] declarator-id 2458/// 2459/// declarator-id: [C++ 8] 2460/// id-expression 2461/// '::'[opt] nested-name-specifier[opt] type-name 2462/// 2463/// id-expression: [C++ 5.1] 2464/// unqualified-id 2465/// qualified-id 2466/// 2467/// unqualified-id: [C++ 5.1] 2468/// identifier 2469/// operator-function-id 2470/// conversion-function-id 2471/// '~' class-name 2472/// template-id 2473/// 2474void Parser::ParseDirectDeclarator(Declarator &D) { 2475 DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec()); 2476 2477 if (getLang().CPlusPlus && D.mayHaveIdentifier()) { 2478 // ParseDeclaratorInternal might already have parsed the scope. 2479 bool afterCXXScope = D.getCXXScopeSpec().isSet() || 2480 ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec(), /*ObjectType=*/0, 2481 true); 2482 if (afterCXXScope) { 2483 if (Actions.ShouldEnterDeclaratorScope(CurScope, D.getCXXScopeSpec())) 2484 // Change the declaration context for name lookup, until this function 2485 // is exited (and the declarator has been parsed). 2486 DeclScopeObj.EnterDeclaratorScope(); 2487 } 2488 2489 if (Tok.is(tok::identifier) || Tok.is(tok::kw_operator) || 2490 Tok.is(tok::annot_template_id) || Tok.is(tok::tilde)) { 2491 // We found something that indicates the start of an unqualified-id. 2492 // Parse that unqualified-id. 2493 bool AllowConstructorName 2494 = ((D.getCXXScopeSpec().isSet() && 2495 D.getContext() == Declarator::FileContext) || 2496 (!D.getCXXScopeSpec().isSet() && 2497 D.getContext() == Declarator::MemberContext)) && 2498 !D.getDeclSpec().hasTypeSpecifier(); 2499 if (ParseUnqualifiedId(D.getCXXScopeSpec(), 2500 /*EnteringContext=*/true, 2501 /*AllowDestructorName=*/true, 2502 AllowConstructorName, 2503 /*ObjectType=*/0, 2504 D.getName())) { 2505 D.SetIdentifier(0, Tok.getLocation()); 2506 D.setInvalidType(true); 2507 } else { 2508 // Parsed the unqualified-id; update range information and move along. 2509 if (D.getSourceRange().getBegin().isInvalid()) 2510 D.SetRangeBegin(D.getName().getSourceRange().getBegin()); 2511 D.SetRangeEnd(D.getName().getSourceRange().getEnd()); 2512 } 2513 goto PastIdentifier; 2514 } 2515 } else if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) { 2516 assert(!getLang().CPlusPlus && 2517 "There's a C++-specific check for tok::identifier above"); 2518 assert(Tok.getIdentifierInfo() && "Not an identifier?"); 2519 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 2520 ConsumeToken(); 2521 goto PastIdentifier; 2522 } 2523 2524 if (Tok.is(tok::l_paren)) { 2525 // direct-declarator: '(' declarator ')' 2526 // direct-declarator: '(' attributes declarator ')' 2527 // Example: 'char (*X)' or 'int (*XX)(void)' 2528 ParseParenDeclarator(D); 2529 2530 // If the declarator was parenthesized, we entered the declarator 2531 // scope when parsing the parenthesized declarator, then exited 2532 // the scope already. Re-enter the scope, if we need to. 2533 if (D.getCXXScopeSpec().isSet()) { 2534 if (Actions.ShouldEnterDeclaratorScope(CurScope, D.getCXXScopeSpec())) 2535 // Change the declaration context for name lookup, until this function 2536 // is exited (and the declarator has been parsed). 2537 DeclScopeObj.EnterDeclaratorScope(); 2538 } 2539 } else if (D.mayOmitIdentifier()) { 2540 // This could be something simple like "int" (in which case the declarator 2541 // portion is empty), if an abstract-declarator is allowed. 2542 D.SetIdentifier(0, Tok.getLocation()); 2543 } else { 2544 if (D.getContext() == Declarator::MemberContext) 2545 Diag(Tok, diag::err_expected_member_name_or_semi) 2546 << D.getDeclSpec().getSourceRange(); 2547 else if (getLang().CPlusPlus) 2548 Diag(Tok, diag::err_expected_unqualified_id) << getLang().CPlusPlus; 2549 else 2550 Diag(Tok, diag::err_expected_ident_lparen); 2551 D.SetIdentifier(0, Tok.getLocation()); 2552 D.setInvalidType(true); 2553 } 2554 2555 PastIdentifier: 2556 assert(D.isPastIdentifier() && 2557 "Haven't past the location of the identifier yet?"); 2558 2559 // Don't parse attributes unless we have an identifier. 2560 if (D.getIdentifier() && getLang().CPlusPlus 2561 && isCXX0XAttributeSpecifier(true)) { 2562 SourceLocation AttrEndLoc; 2563 CXX0XAttributeList Attr = ParseCXX0XAttributes(); 2564 D.AddAttributes(Attr.AttrList, AttrEndLoc); 2565 } 2566 2567 while (1) { 2568 if (Tok.is(tok::l_paren)) { 2569 // The paren may be part of a C++ direct initializer, eg. "int x(1);". 2570 // In such a case, check if we actually have a function declarator; if it 2571 // is not, the declarator has been fully parsed. 2572 if (getLang().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) { 2573 // When not in file scope, warn for ambiguous function declarators, just 2574 // in case the author intended it as a variable definition. 2575 bool warnIfAmbiguous = D.getContext() != Declarator::FileContext; 2576 if (!isCXXFunctionDeclarator(warnIfAmbiguous)) 2577 break; 2578 } 2579 ParseFunctionDeclarator(ConsumeParen(), D); 2580 } else if (Tok.is(tok::l_square)) { 2581 ParseBracketDeclarator(D); 2582 } else { 2583 break; 2584 } 2585 } 2586} 2587 2588/// ParseParenDeclarator - We parsed the declarator D up to a paren. This is 2589/// only called before the identifier, so these are most likely just grouping 2590/// parens for precedence. If we find that these are actually function 2591/// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator. 2592/// 2593/// direct-declarator: 2594/// '(' declarator ')' 2595/// [GNU] '(' attributes declarator ')' 2596/// direct-declarator '(' parameter-type-list ')' 2597/// direct-declarator '(' identifier-list[opt] ')' 2598/// [GNU] direct-declarator '(' parameter-forward-declarations 2599/// parameter-type-list[opt] ')' 2600/// 2601void Parser::ParseParenDeclarator(Declarator &D) { 2602 SourceLocation StartLoc = ConsumeParen(); 2603 assert(!D.isPastIdentifier() && "Should be called before passing identifier"); 2604 2605 // Eat any attributes before we look at whether this is a grouping or function 2606 // declarator paren. If this is a grouping paren, the attribute applies to 2607 // the type being built up, for example: 2608 // int (__attribute__(()) *x)(long y) 2609 // If this ends up not being a grouping paren, the attribute applies to the 2610 // first argument, for example: 2611 // int (__attribute__(()) int x) 2612 // In either case, we need to eat any attributes to be able to determine what 2613 // sort of paren this is. 2614 // 2615 AttributeList *AttrList = 0; 2616 bool RequiresArg = false; 2617 if (Tok.is(tok::kw___attribute)) { 2618 AttrList = ParseGNUAttributes(); 2619 2620 // We require that the argument list (if this is a non-grouping paren) be 2621 // present even if the attribute list was empty. 2622 RequiresArg = true; 2623 } 2624 // Eat any Microsoft extensions. 2625 if (Tok.is(tok::kw___cdecl) || Tok.is(tok::kw___stdcall) || 2626 Tok.is(tok::kw___fastcall) || Tok.is(tok::kw___w64) || 2627 Tok.is(tok::kw___ptr64)) { 2628 AttrList = ParseMicrosoftTypeAttributes(AttrList); 2629 } 2630 2631 // If we haven't past the identifier yet (or where the identifier would be 2632 // stored, if this is an abstract declarator), then this is probably just 2633 // grouping parens. However, if this could be an abstract-declarator, then 2634 // this could also be the start of function arguments (consider 'void()'). 2635 bool isGrouping; 2636 2637 if (!D.mayOmitIdentifier()) { 2638 // If this can't be an abstract-declarator, this *must* be a grouping 2639 // paren, because we haven't seen the identifier yet. 2640 isGrouping = true; 2641 } else if (Tok.is(tok::r_paren) || // 'int()' is a function. 2642 (getLang().CPlusPlus && Tok.is(tok::ellipsis)) || // C++ int(...) 2643 isDeclarationSpecifier()) { // 'int(int)' is a function. 2644 // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is 2645 // considered to be a type, not a K&R identifier-list. 2646 isGrouping = false; 2647 } else { 2648 // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'. 2649 isGrouping = true; 2650 } 2651 2652 // If this is a grouping paren, handle: 2653 // direct-declarator: '(' declarator ')' 2654 // direct-declarator: '(' attributes declarator ')' 2655 if (isGrouping) { 2656 bool hadGroupingParens = D.hasGroupingParens(); 2657 D.setGroupingParens(true); 2658 if (AttrList) 2659 D.AddAttributes(AttrList, SourceLocation()); 2660 2661 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator); 2662 // Match the ')'. 2663 SourceLocation Loc = MatchRHSPunctuation(tok::r_paren, StartLoc); 2664 2665 D.setGroupingParens(hadGroupingParens); 2666 D.SetRangeEnd(Loc); 2667 return; 2668 } 2669 2670 // Okay, if this wasn't a grouping paren, it must be the start of a function 2671 // argument list. Recognize that this declarator will never have an 2672 // identifier (and remember where it would have been), then call into 2673 // ParseFunctionDeclarator to handle of argument list. 2674 D.SetIdentifier(0, Tok.getLocation()); 2675 2676 ParseFunctionDeclarator(StartLoc, D, AttrList, RequiresArg); 2677} 2678 2679/// ParseFunctionDeclarator - We are after the identifier and have parsed the 2680/// declarator D up to a paren, which indicates that we are parsing function 2681/// arguments. 2682/// 2683/// If AttrList is non-null, then the caller parsed those arguments immediately 2684/// after the open paren - they should be considered to be the first argument of 2685/// a parameter. If RequiresArg is true, then the first argument of the 2686/// function is required to be present and required to not be an identifier 2687/// list. 2688/// 2689/// This method also handles this portion of the grammar: 2690/// parameter-type-list: [C99 6.7.5] 2691/// parameter-list 2692/// parameter-list ',' '...' 2693/// [C++] parameter-list '...' 2694/// 2695/// parameter-list: [C99 6.7.5] 2696/// parameter-declaration 2697/// parameter-list ',' parameter-declaration 2698/// 2699/// parameter-declaration: [C99 6.7.5] 2700/// declaration-specifiers declarator 2701/// [C++] declaration-specifiers declarator '=' assignment-expression 2702/// [GNU] declaration-specifiers declarator attributes 2703/// declaration-specifiers abstract-declarator[opt] 2704/// [C++] declaration-specifiers abstract-declarator[opt] 2705/// '=' assignment-expression 2706/// [GNU] declaration-specifiers abstract-declarator[opt] attributes 2707/// 2708/// For C++, after the parameter-list, it also parses "cv-qualifier-seq[opt]" 2709/// and "exception-specification[opt]". 2710/// 2711void Parser::ParseFunctionDeclarator(SourceLocation LParenLoc, Declarator &D, 2712 AttributeList *AttrList, 2713 bool RequiresArg) { 2714 // lparen is already consumed! 2715 assert(D.isPastIdentifier() && "Should not call before identifier!"); 2716 2717 // This parameter list may be empty. 2718 if (Tok.is(tok::r_paren)) { 2719 if (RequiresArg) { 2720 Diag(Tok, diag::err_argument_required_after_attribute); 2721 delete AttrList; 2722 } 2723 2724 SourceLocation RParenLoc = ConsumeParen(); // Eat the closing ')'. 2725 SourceLocation EndLoc = RParenLoc; 2726 2727 // cv-qualifier-seq[opt]. 2728 DeclSpec DS; 2729 bool hasExceptionSpec = false; 2730 SourceLocation ThrowLoc; 2731 bool hasAnyExceptionSpec = false; 2732 llvm::SmallVector<TypeTy*, 2> Exceptions; 2733 llvm::SmallVector<SourceRange, 2> ExceptionRanges; 2734 if (getLang().CPlusPlus) { 2735 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 2736 if (!DS.getSourceRange().getEnd().isInvalid()) 2737 EndLoc = DS.getSourceRange().getEnd(); 2738 2739 // Parse exception-specification[opt]. 2740 if (Tok.is(tok::kw_throw)) { 2741 hasExceptionSpec = true; 2742 ThrowLoc = Tok.getLocation(); 2743 ParseExceptionSpecification(EndLoc, Exceptions, ExceptionRanges, 2744 hasAnyExceptionSpec); 2745 assert(Exceptions.size() == ExceptionRanges.size() && 2746 "Produced different number of exception types and ranges."); 2747 } 2748 } 2749 2750 // Remember that we parsed a function type, and remember the attributes. 2751 // int() -> no prototype, no '...'. 2752 D.AddTypeInfo(DeclaratorChunk::getFunction(/*prototype*/getLang().CPlusPlus, 2753 /*variadic*/ false, 2754 SourceLocation(), 2755 /*arglist*/ 0, 0, 2756 DS.getTypeQualifiers(), 2757 hasExceptionSpec, ThrowLoc, 2758 hasAnyExceptionSpec, 2759 Exceptions.data(), 2760 ExceptionRanges.data(), 2761 Exceptions.size(), 2762 LParenLoc, RParenLoc, D), 2763 EndLoc); 2764 return; 2765 } 2766 2767 // Alternatively, this parameter list may be an identifier list form for a 2768 // K&R-style function: void foo(a,b,c) 2769 if (!getLang().CPlusPlus && Tok.is(tok::identifier)) { 2770 if (!TryAnnotateTypeOrScopeToken()) { 2771 // K&R identifier lists can't have typedefs as identifiers, per 2772 // C99 6.7.5.3p11. 2773 if (RequiresArg) { 2774 Diag(Tok, diag::err_argument_required_after_attribute); 2775 delete AttrList; 2776 } 2777 // Identifier list. Note that '(' identifier-list ')' is only allowed for 2778 // normal declarators, not for abstract-declarators. 2779 return ParseFunctionDeclaratorIdentifierList(LParenLoc, D); 2780 } 2781 } 2782 2783 // Finally, a normal, non-empty parameter type list. 2784 2785 // Build up an array of information about the parsed arguments. 2786 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; 2787 2788 // Enter function-declaration scope, limiting any declarators to the 2789 // function prototype scope, including parameter declarators. 2790 ParseScope PrototypeScope(this, 2791 Scope::FunctionPrototypeScope|Scope::DeclScope); 2792 2793 bool IsVariadic = false; 2794 SourceLocation EllipsisLoc; 2795 while (1) { 2796 if (Tok.is(tok::ellipsis)) { 2797 IsVariadic = true; 2798 EllipsisLoc = ConsumeToken(); // Consume the ellipsis. 2799 break; 2800 } 2801 2802 SourceLocation DSStart = Tok.getLocation(); 2803 2804 // Parse the declaration-specifiers. 2805 // Just use the ParsingDeclaration "scope" of the declarator. 2806 DeclSpec DS; 2807 2808 // If the caller parsed attributes for the first argument, add them now. 2809 if (AttrList) { 2810 DS.AddAttributes(AttrList); 2811 AttrList = 0; // Only apply the attributes to the first parameter. 2812 } 2813 ParseDeclarationSpecifiers(DS); 2814 2815 // Parse the declarator. This is "PrototypeContext", because we must 2816 // accept either 'declarator' or 'abstract-declarator' here. 2817 Declarator ParmDecl(DS, Declarator::PrototypeContext); 2818 ParseDeclarator(ParmDecl); 2819 2820 // Parse GNU attributes, if present. 2821 if (Tok.is(tok::kw___attribute)) { 2822 SourceLocation Loc; 2823 AttributeList *AttrList = ParseGNUAttributes(&Loc); 2824 ParmDecl.AddAttributes(AttrList, Loc); 2825 } 2826 2827 // Remember this parsed parameter in ParamInfo. 2828 IdentifierInfo *ParmII = ParmDecl.getIdentifier(); 2829 2830 // DefArgToks is used when the parsing of default arguments needs 2831 // to be delayed. 2832 CachedTokens *DefArgToks = 0; 2833 2834 // If no parameter was specified, verify that *something* was specified, 2835 // otherwise we have a missing type and identifier. 2836 if (DS.isEmpty() && ParmDecl.getIdentifier() == 0 && 2837 ParmDecl.getNumTypeObjects() == 0) { 2838 // Completely missing, emit error. 2839 Diag(DSStart, diag::err_missing_param); 2840 } else { 2841 // Otherwise, we have something. Add it and let semantic analysis try 2842 // to grok it and add the result to the ParamInfo we are building. 2843 2844 // Inform the actions module about the parameter declarator, so it gets 2845 // added to the current scope. 2846 DeclPtrTy Param = Actions.ActOnParamDeclarator(CurScope, ParmDecl); 2847 2848 // Parse the default argument, if any. We parse the default 2849 // arguments in all dialects; the semantic analysis in 2850 // ActOnParamDefaultArgument will reject the default argument in 2851 // C. 2852 if (Tok.is(tok::equal)) { 2853 SourceLocation EqualLoc = Tok.getLocation(); 2854 2855 // Parse the default argument 2856 if (D.getContext() == Declarator::MemberContext) { 2857 // If we're inside a class definition, cache the tokens 2858 // corresponding to the default argument. We'll actually parse 2859 // them when we see the end of the class definition. 2860 // FIXME: Templates will require something similar. 2861 // FIXME: Can we use a smart pointer for Toks? 2862 DefArgToks = new CachedTokens; 2863 2864 if (!ConsumeAndStoreUntil(tok::comma, tok::r_paren, *DefArgToks, 2865 tok::semi, false)) { 2866 delete DefArgToks; 2867 DefArgToks = 0; 2868 Actions.ActOnParamDefaultArgumentError(Param); 2869 } else 2870 Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc, 2871 (*DefArgToks)[1].getLocation()); 2872 } else { 2873 // Consume the '='. 2874 ConsumeToken(); 2875 2876 OwningExprResult DefArgResult(ParseAssignmentExpression()); 2877 if (DefArgResult.isInvalid()) { 2878 Actions.ActOnParamDefaultArgumentError(Param); 2879 SkipUntil(tok::comma, tok::r_paren, true, true); 2880 } else { 2881 // Inform the actions module about the default argument 2882 Actions.ActOnParamDefaultArgument(Param, EqualLoc, 2883 move(DefArgResult)); 2884 } 2885 } 2886 } 2887 2888 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, 2889 ParmDecl.getIdentifierLoc(), Param, 2890 DefArgToks)); 2891 } 2892 2893 // If the next token is a comma, consume it and keep reading arguments. 2894 if (Tok.isNot(tok::comma)) { 2895 if (Tok.is(tok::ellipsis)) { 2896 IsVariadic = true; 2897 EllipsisLoc = ConsumeToken(); // Consume the ellipsis. 2898 2899 if (!getLang().CPlusPlus) { 2900 // We have ellipsis without a preceding ',', which is ill-formed 2901 // in C. Complain and provide the fix. 2902 Diag(EllipsisLoc, diag::err_missing_comma_before_ellipsis) 2903 << CodeModificationHint::CreateInsertion(EllipsisLoc, ", "); 2904 } 2905 } 2906 2907 break; 2908 } 2909 2910 // Consume the comma. 2911 ConsumeToken(); 2912 } 2913 2914 // Leave prototype scope. 2915 PrototypeScope.Exit(); 2916 2917 // If we have the closing ')', eat it. 2918 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 2919 SourceLocation EndLoc = RParenLoc; 2920 2921 DeclSpec DS; 2922 bool hasExceptionSpec = false; 2923 SourceLocation ThrowLoc; 2924 bool hasAnyExceptionSpec = false; 2925 llvm::SmallVector<TypeTy*, 2> Exceptions; 2926 llvm::SmallVector<SourceRange, 2> ExceptionRanges; 2927 2928 if (getLang().CPlusPlus) { 2929 // Parse cv-qualifier-seq[opt]. 2930 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 2931 if (!DS.getSourceRange().getEnd().isInvalid()) 2932 EndLoc = DS.getSourceRange().getEnd(); 2933 2934 // Parse exception-specification[opt]. 2935 if (Tok.is(tok::kw_throw)) { 2936 hasExceptionSpec = true; 2937 ThrowLoc = Tok.getLocation(); 2938 ParseExceptionSpecification(EndLoc, Exceptions, ExceptionRanges, 2939 hasAnyExceptionSpec); 2940 assert(Exceptions.size() == ExceptionRanges.size() && 2941 "Produced different number of exception types and ranges."); 2942 } 2943 } 2944 2945 // Remember that we parsed a function type, and remember the attributes. 2946 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/true, IsVariadic, 2947 EllipsisLoc, 2948 ParamInfo.data(), ParamInfo.size(), 2949 DS.getTypeQualifiers(), 2950 hasExceptionSpec, ThrowLoc, 2951 hasAnyExceptionSpec, 2952 Exceptions.data(), 2953 ExceptionRanges.data(), 2954 Exceptions.size(), 2955 LParenLoc, RParenLoc, D), 2956 EndLoc); 2957} 2958 2959/// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator 2960/// we found a K&R-style identifier list instead of a type argument list. The 2961/// current token is known to be the first identifier in the list. 2962/// 2963/// identifier-list: [C99 6.7.5] 2964/// identifier 2965/// identifier-list ',' identifier 2966/// 2967void Parser::ParseFunctionDeclaratorIdentifierList(SourceLocation LParenLoc, 2968 Declarator &D) { 2969 // Build up an array of information about the parsed arguments. 2970 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; 2971 llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar; 2972 2973 // If there was no identifier specified for the declarator, either we are in 2974 // an abstract-declarator, or we are in a parameter declarator which was found 2975 // to be abstract. In abstract-declarators, identifier lists are not valid: 2976 // diagnose this. 2977 if (!D.getIdentifier()) 2978 Diag(Tok, diag::ext_ident_list_in_param); 2979 2980 // Tok is known to be the first identifier in the list. Remember this 2981 // identifier in ParamInfo. 2982 ParamsSoFar.insert(Tok.getIdentifierInfo()); 2983 ParamInfo.push_back(DeclaratorChunk::ParamInfo(Tok.getIdentifierInfo(), 2984 Tok.getLocation(), 2985 DeclPtrTy())); 2986 2987 ConsumeToken(); // eat the first identifier. 2988 2989 while (Tok.is(tok::comma)) { 2990 // Eat the comma. 2991 ConsumeToken(); 2992 2993 // If this isn't an identifier, report the error and skip until ')'. 2994 if (Tok.isNot(tok::identifier)) { 2995 Diag(Tok, diag::err_expected_ident); 2996 SkipUntil(tok::r_paren); 2997 return; 2998 } 2999 3000 IdentifierInfo *ParmII = Tok.getIdentifierInfo(); 3001 3002 // Reject 'typedef int y; int test(x, y)', but continue parsing. 3003 if (Actions.getTypeName(*ParmII, Tok.getLocation(), CurScope)) 3004 Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII; 3005 3006 // Verify that the argument identifier has not already been mentioned. 3007 if (!ParamsSoFar.insert(ParmII)) { 3008 Diag(Tok, diag::err_param_redefinition) << ParmII; 3009 } else { 3010 // Remember this identifier in ParamInfo. 3011 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, 3012 Tok.getLocation(), 3013 DeclPtrTy())); 3014 } 3015 3016 // Eat the identifier. 3017 ConsumeToken(); 3018 } 3019 3020 // If we have the closing ')', eat it and we're done. 3021 SourceLocation RLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 3022 3023 // Remember that we parsed a function type, and remember the attributes. This 3024 // function type is always a K&R style function type, which is not varargs and 3025 // has no prototype. 3026 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/false, /*varargs*/false, 3027 SourceLocation(), 3028 &ParamInfo[0], ParamInfo.size(), 3029 /*TypeQuals*/0, 3030 /*exception*/false, 3031 SourceLocation(), false, 0, 0, 0, 3032 LParenLoc, RLoc, D), 3033 RLoc); 3034} 3035 3036/// [C90] direct-declarator '[' constant-expression[opt] ']' 3037/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']' 3038/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']' 3039/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']' 3040/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']' 3041void Parser::ParseBracketDeclarator(Declarator &D) { 3042 SourceLocation StartLoc = ConsumeBracket(); 3043 3044 // C array syntax has many features, but by-far the most common is [] and [4]. 3045 // This code does a fast path to handle some of the most obvious cases. 3046 if (Tok.getKind() == tok::r_square) { 3047 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 3048 //FIXME: Use these 3049 CXX0XAttributeList Attr; 3050 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier(true)) { 3051 Attr = ParseCXX0XAttributes(); 3052 } 3053 3054 // Remember that we parsed the empty array type. 3055 OwningExprResult NumElements(Actions); 3056 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, 0, 3057 StartLoc, EndLoc), 3058 EndLoc); 3059 return; 3060 } else if (Tok.getKind() == tok::numeric_constant && 3061 GetLookAheadToken(1).is(tok::r_square)) { 3062 // [4] is very common. Parse the numeric constant expression. 3063 OwningExprResult ExprRes(Actions.ActOnNumericConstant(Tok)); 3064 ConsumeToken(); 3065 3066 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 3067 //FIXME: Use these 3068 CXX0XAttributeList Attr; 3069 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 3070 Attr = ParseCXX0XAttributes(); 3071 } 3072 3073 // If there was an error parsing the assignment-expression, recover. 3074 if (ExprRes.isInvalid()) 3075 ExprRes.release(); // Deallocate expr, just use []. 3076 3077 // Remember that we parsed a array type, and remember its features. 3078 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, 0, ExprRes.release(), 3079 StartLoc, EndLoc), 3080 EndLoc); 3081 return; 3082 } 3083 3084 // If valid, this location is the position where we read the 'static' keyword. 3085 SourceLocation StaticLoc; 3086 if (Tok.is(tok::kw_static)) 3087 StaticLoc = ConsumeToken(); 3088 3089 // If there is a type-qualifier-list, read it now. 3090 // Type qualifiers in an array subscript are a C99 feature. 3091 DeclSpec DS; 3092 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 3093 3094 // If we haven't already read 'static', check to see if there is one after the 3095 // type-qualifier-list. 3096 if (!StaticLoc.isValid() && Tok.is(tok::kw_static)) 3097 StaticLoc = ConsumeToken(); 3098 3099 // Handle "direct-declarator [ type-qual-list[opt] * ]". 3100 bool isStar = false; 3101 OwningExprResult NumElements(Actions); 3102 3103 // Handle the case where we have '[*]' as the array size. However, a leading 3104 // star could be the start of an expression, for example 'X[*p + 4]'. Verify 3105 // the the token after the star is a ']'. Since stars in arrays are 3106 // infrequent, use of lookahead is not costly here. 3107 if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) { 3108 ConsumeToken(); // Eat the '*'. 3109 3110 if (StaticLoc.isValid()) { 3111 Diag(StaticLoc, diag::err_unspecified_vla_size_with_static); 3112 StaticLoc = SourceLocation(); // Drop the static. 3113 } 3114 isStar = true; 3115 } else if (Tok.isNot(tok::r_square)) { 3116 // Note, in C89, this production uses the constant-expr production instead 3117 // of assignment-expr. The only difference is that assignment-expr allows 3118 // things like '=' and '*='. Sema rejects these in C89 mode because they 3119 // are not i-c-e's, so we don't need to distinguish between the two here. 3120 3121 // Parse the constant-expression or assignment-expression now (depending 3122 // on dialect). 3123 if (getLang().CPlusPlus) 3124 NumElements = ParseConstantExpression(); 3125 else 3126 NumElements = ParseAssignmentExpression(); 3127 } 3128 3129 // If there was an error parsing the assignment-expression, recover. 3130 if (NumElements.isInvalid()) { 3131 D.setInvalidType(true); 3132 // If the expression was invalid, skip it. 3133 SkipUntil(tok::r_square); 3134 return; 3135 } 3136 3137 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 3138 3139 //FIXME: Use these 3140 CXX0XAttributeList Attr; 3141 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 3142 Attr = ParseCXX0XAttributes(); 3143 } 3144 3145 // Remember that we parsed a array type, and remember its features. 3146 D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(), 3147 StaticLoc.isValid(), isStar, 3148 NumElements.release(), 3149 StartLoc, EndLoc), 3150 EndLoc); 3151} 3152 3153/// [GNU] typeof-specifier: 3154/// typeof ( expressions ) 3155/// typeof ( type-name ) 3156/// [GNU/C++] typeof unary-expression 3157/// 3158void Parser::ParseTypeofSpecifier(DeclSpec &DS) { 3159 assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier"); 3160 Token OpTok = Tok; 3161 SourceLocation StartLoc = ConsumeToken(); 3162 3163 const bool hasParens = Tok.is(tok::l_paren); 3164 3165 bool isCastExpr; 3166 TypeTy *CastTy; 3167 SourceRange CastRange; 3168 OwningExprResult Operand = ParseExprAfterTypeofSizeofAlignof(OpTok, 3169 isCastExpr, 3170 CastTy, 3171 CastRange); 3172 if (hasParens) 3173 DS.setTypeofParensRange(CastRange); 3174 3175 if (CastRange.getEnd().isInvalid()) 3176 // FIXME: Not accurate, the range gets one token more than it should. 3177 DS.SetRangeEnd(Tok.getLocation()); 3178 else 3179 DS.SetRangeEnd(CastRange.getEnd()); 3180 3181 if (isCastExpr) { 3182 if (!CastTy) { 3183 DS.SetTypeSpecError(); 3184 return; 3185 } 3186 3187 const char *PrevSpec = 0; 3188 unsigned DiagID; 3189 // Check for duplicate type specifiers (e.g. "int typeof(int)"). 3190 if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec, 3191 DiagID, CastTy)) 3192 Diag(StartLoc, DiagID) << PrevSpec; 3193 return; 3194 } 3195 3196 // If we get here, the operand to the typeof was an expresion. 3197 if (Operand.isInvalid()) { 3198 DS.SetTypeSpecError(); 3199 return; 3200 } 3201 3202 const char *PrevSpec = 0; 3203 unsigned DiagID; 3204 // Check for duplicate type specifiers (e.g. "int typeof(int)"). 3205 if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec, 3206 DiagID, Operand.release())) 3207 Diag(StartLoc, DiagID) << PrevSpec; 3208} 3209