ParseDecl.cpp revision db422dffb720ff41d0b60e228f45c685600ffa9e
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 "ExtensionRAIIObject.h" 18#include "llvm/ADT/SmallSet.h" 19using namespace clang; 20 21//===----------------------------------------------------------------------===// 22// C99 6.7: Declarations. 23//===----------------------------------------------------------------------===// 24 25/// ParseTypeName 26/// type-name: [C99 6.7.6] 27/// specifier-qualifier-list abstract-declarator[opt] 28/// 29/// Called type-id in C++. 30Action::TypeResult Parser::ParseTypeName(SourceRange *Range) { 31 // Parse the common declaration-specifiers piece. 32 DeclSpec DS; 33 ParseSpecifierQualifierList(DS); 34 35 // Parse the abstract-declarator, if present. 36 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); 37 ParseDeclarator(DeclaratorInfo); 38 if (Range) 39 *Range = DeclaratorInfo.getSourceRange(); 40 41 if (DeclaratorInfo.isInvalidType()) 42 return true; 43 44 return Actions.ActOnTypeName(CurScope, DeclaratorInfo); 45} 46 47/// ParseAttributes - Parse a non-empty attributes list. 48/// 49/// [GNU] attributes: 50/// attribute 51/// attributes attribute 52/// 53/// [GNU] attribute: 54/// '__attribute__' '(' '(' attribute-list ')' ')' 55/// 56/// [GNU] attribute-list: 57/// attrib 58/// attribute_list ',' attrib 59/// 60/// [GNU] attrib: 61/// empty 62/// attrib-name 63/// attrib-name '(' identifier ')' 64/// attrib-name '(' identifier ',' nonempty-expr-list ')' 65/// attrib-name '(' argument-expression-list [C99 6.5.2] ')' 66/// 67/// [GNU] attrib-name: 68/// identifier 69/// typespec 70/// typequal 71/// storageclass 72/// 73/// FIXME: The GCC grammar/code for this construct implies we need two 74/// token lookahead. Comment from gcc: "If they start with an identifier 75/// which is followed by a comma or close parenthesis, then the arguments 76/// start with that identifier; otherwise they are an expression list." 77/// 78/// At the moment, I am not doing 2 token lookahead. I am also unaware of 79/// any attributes that don't work (based on my limited testing). Most 80/// attributes are very simple in practice. Until we find a bug, I don't see 81/// a pressing need to implement the 2 token lookahead. 82 83AttributeList *Parser::ParseAttributes(SourceLocation *EndLoc) { 84 assert(Tok.is(tok::kw___attribute) && "Not an attribute list!"); 85 86 AttributeList *CurrAttr = 0; 87 88 while (Tok.is(tok::kw___attribute)) { 89 ConsumeToken(); 90 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, 91 "attribute")) { 92 SkipUntil(tok::r_paren, true); // skip until ) or ; 93 return CurrAttr; 94 } 95 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, "(")) { 96 SkipUntil(tok::r_paren, true); // skip until ) or ; 97 return CurrAttr; 98 } 99 // Parse the attribute-list. e.g. __attribute__(( weak, alias("__f") )) 100 while (Tok.is(tok::identifier) || isDeclarationSpecifier() || 101 Tok.is(tok::comma)) { 102 103 if (Tok.is(tok::comma)) { 104 // allows for empty/non-empty attributes. ((__vector_size__(16),,,,)) 105 ConsumeToken(); 106 continue; 107 } 108 // we have an identifier or declaration specifier (const, int, etc.) 109 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 110 SourceLocation AttrNameLoc = ConsumeToken(); 111 112 // check if we have a "paramterized" attribute 113 if (Tok.is(tok::l_paren)) { 114 ConsumeParen(); // ignore the left paren loc for now 115 116 if (Tok.is(tok::identifier)) { 117 IdentifierInfo *ParmName = Tok.getIdentifierInfo(); 118 SourceLocation ParmLoc = ConsumeToken(); 119 120 if (Tok.is(tok::r_paren)) { 121 // __attribute__(( mode(byte) )) 122 ConsumeParen(); // ignore the right paren loc for now 123 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 124 ParmName, ParmLoc, 0, 0, CurrAttr); 125 } else if (Tok.is(tok::comma)) { 126 ConsumeToken(); 127 // __attribute__(( format(printf, 1, 2) )) 128 ExprVector ArgExprs(Actions); 129 bool ArgExprsOk = true; 130 131 // now parse the non-empty comma separated list of expressions 132 while (1) { 133 OwningExprResult ArgExpr(ParseAssignmentExpression()); 134 if (ArgExpr.isInvalid()) { 135 ArgExprsOk = false; 136 SkipUntil(tok::r_paren); 137 break; 138 } else { 139 ArgExprs.push_back(ArgExpr.release()); 140 } 141 if (Tok.isNot(tok::comma)) 142 break; 143 ConsumeToken(); // Eat the comma, move to the next argument 144 } 145 if (ArgExprsOk && Tok.is(tok::r_paren)) { 146 ConsumeParen(); // ignore the right paren loc for now 147 CurrAttr = new AttributeList(AttrName, AttrNameLoc, ParmName, 148 ParmLoc, ArgExprs.take(), ArgExprs.size(), CurrAttr); 149 } 150 } 151 } else { // not an identifier 152 switch (Tok.getKind()) { 153 case tok::r_paren: 154 // parse a possibly empty comma separated list of expressions 155 // __attribute__(( nonnull() )) 156 ConsumeParen(); // ignore the right paren loc for now 157 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 158 0, SourceLocation(), 0, 0, CurrAttr); 159 break; 160 case tok::kw_char: 161 case tok::kw_wchar_t: 162 case tok::kw_char16_t: 163 case tok::kw_char32_t: 164 case tok::kw_bool: 165 case tok::kw_short: 166 case tok::kw_int: 167 case tok::kw_long: 168 case tok::kw_signed: 169 case tok::kw_unsigned: 170 case tok::kw_float: 171 case tok::kw_double: 172 case tok::kw_void: 173 case tok::kw_typeof: 174 // If it's a builtin type name, eat it and expect a rparen 175 // __attribute__(( vec_type_hint(char) )) 176 ConsumeToken(); 177 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 178 0, SourceLocation(), 0, 0, CurrAttr); 179 if (Tok.is(tok::r_paren)) 180 ConsumeParen(); 181 break; 182 default: 183 // __attribute__(( aligned(16) )) 184 ExprVector ArgExprs(Actions); 185 bool ArgExprsOk = true; 186 187 // now parse the list of expressions 188 while (1) { 189 OwningExprResult ArgExpr(ParseAssignmentExpression()); 190 if (ArgExpr.isInvalid()) { 191 ArgExprsOk = false; 192 SkipUntil(tok::r_paren); 193 break; 194 } else { 195 ArgExprs.push_back(ArgExpr.release()); 196 } 197 if (Tok.isNot(tok::comma)) 198 break; 199 ConsumeToken(); // Eat the comma, move to the next argument 200 } 201 // Match the ')'. 202 if (ArgExprsOk && Tok.is(tok::r_paren)) { 203 ConsumeParen(); // ignore the right paren loc for now 204 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, 205 SourceLocation(), ArgExprs.take(), ArgExprs.size(), 206 CurrAttr); 207 } 208 break; 209 } 210 } 211 } else { 212 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 213 0, SourceLocation(), 0, 0, CurrAttr); 214 } 215 } 216 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) 217 SkipUntil(tok::r_paren, false); 218 SourceLocation Loc = Tok.getLocation();; 219 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) { 220 SkipUntil(tok::r_paren, false); 221 } 222 if (EndLoc) 223 *EndLoc = Loc; 224 } 225 return CurrAttr; 226} 227 228/// ParseMicrosoftDeclSpec - Parse an __declspec construct 229/// 230/// [MS] decl-specifier: 231/// __declspec ( extended-decl-modifier-seq ) 232/// 233/// [MS] extended-decl-modifier-seq: 234/// extended-decl-modifier[opt] 235/// extended-decl-modifier extended-decl-modifier-seq 236 237AttributeList* Parser::ParseMicrosoftDeclSpec(AttributeList *CurrAttr) { 238 assert(Tok.is(tok::kw___declspec) && "Not a declspec!"); 239 240 ConsumeToken(); 241 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, 242 "declspec")) { 243 SkipUntil(tok::r_paren, true); // skip until ) or ; 244 return CurrAttr; 245 } 246 while (Tok.getIdentifierInfo()) { 247 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 248 SourceLocation AttrNameLoc = ConsumeToken(); 249 if (Tok.is(tok::l_paren)) { 250 ConsumeParen(); 251 // FIXME: This doesn't parse __declspec(property(get=get_func_name)) 252 // correctly. 253 OwningExprResult ArgExpr(ParseAssignmentExpression()); 254 if (!ArgExpr.isInvalid()) { 255 ExprTy* ExprList = ArgExpr.take(); 256 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, 257 SourceLocation(), &ExprList, 1, 258 CurrAttr, true); 259 } 260 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) 261 SkipUntil(tok::r_paren, false); 262 } else { 263 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, SourceLocation(), 264 0, 0, CurrAttr, true); 265 } 266 } 267 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) 268 SkipUntil(tok::r_paren, false); 269 return CurrAttr; 270} 271 272AttributeList* Parser::ParseMicrosoftTypeAttributes(AttributeList *CurrAttr) { 273 // Treat these like attributes 274 // FIXME: Allow Sema to distinguish between these and real attributes! 275 while (Tok.is(tok::kw___fastcall) || Tok.is(tok::kw___stdcall) || 276 Tok.is(tok::kw___cdecl) || Tok.is(tok::kw___ptr64) || 277 Tok.is(tok::kw___w64)) { 278 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 279 SourceLocation AttrNameLoc = ConsumeToken(); 280 if (Tok.is(tok::kw___ptr64) || Tok.is(tok::kw___w64)) 281 // FIXME: Support these properly! 282 continue; 283 CurrAttr = new AttributeList(AttrName, AttrNameLoc, 0, 284 SourceLocation(), 0, 0, CurrAttr, true); 285 } 286 return CurrAttr; 287} 288 289/// ParseDeclaration - Parse a full 'declaration', which consists of 290/// declaration-specifiers, some number of declarators, and a semicolon. 291/// 'Context' should be a Declarator::TheContext value. This returns the 292/// location of the semicolon in DeclEnd. 293/// 294/// declaration: [C99 6.7] 295/// block-declaration -> 296/// simple-declaration 297/// others [FIXME] 298/// [C++] template-declaration 299/// [C++] namespace-definition 300/// [C++] using-directive 301/// [C++] using-declaration 302/// [C++0x] static_assert-declaration 303/// others... [FIXME] 304/// 305Parser::DeclGroupPtrTy Parser::ParseDeclaration(unsigned Context, 306 SourceLocation &DeclEnd) { 307 DeclPtrTy SingleDecl; 308 switch (Tok.getKind()) { 309 case tok::kw_template: 310 case tok::kw_export: 311 SingleDecl = ParseDeclarationStartingWithTemplate(Context, DeclEnd); 312 break; 313 case tok::kw_namespace: 314 SingleDecl = ParseNamespace(Context, DeclEnd); 315 break; 316 case tok::kw_using: 317 SingleDecl = ParseUsingDirectiveOrDeclaration(Context, DeclEnd); 318 break; 319 case tok::kw_static_assert: 320 SingleDecl = ParseStaticAssertDeclaration(DeclEnd); 321 break; 322 default: 323 return ParseSimpleDeclaration(Context, DeclEnd); 324 } 325 326 // This routine returns a DeclGroup, if the thing we parsed only contains a 327 // single decl, convert it now. 328 return Actions.ConvertDeclToDeclGroup(SingleDecl); 329} 330 331/// simple-declaration: [C99 6.7: declaration] [C++ 7p1: dcl.dcl] 332/// declaration-specifiers init-declarator-list[opt] ';' 333///[C90/C++]init-declarator-list ';' [TODO] 334/// [OMP] threadprivate-directive [TODO] 335/// 336/// If RequireSemi is false, this does not check for a ';' at the end of the 337/// declaration. 338Parser::DeclGroupPtrTy Parser::ParseSimpleDeclaration(unsigned Context, 339 SourceLocation &DeclEnd, 340 bool RequireSemi) { 341 // Parse the common declaration-specifiers piece. 342 DeclSpec DS; 343 ParseDeclarationSpecifiers(DS); 344 345 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 346 // declaration-specifiers init-declarator-list[opt] ';' 347 if (Tok.is(tok::semi)) { 348 ConsumeToken(); 349 DeclPtrTy TheDecl = Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 350 return Actions.ConvertDeclToDeclGroup(TheDecl); 351 } 352 353 Declarator DeclaratorInfo(DS, (Declarator::TheContext)Context); 354 ParseDeclarator(DeclaratorInfo); 355 356 DeclGroupPtrTy DG = 357 ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo); 358 359 DeclEnd = Tok.getLocation(); 360 361 // If the client wants to check what comes after the declaration, just return 362 // immediately without checking anything! 363 if (!RequireSemi) return DG; 364 365 if (Tok.is(tok::semi)) { 366 ConsumeToken(); 367 return DG; 368 } 369 370 Diag(Tok, diag::err_expected_semi_declaration); 371 // Skip to end of block or statement 372 SkipUntil(tok::r_brace, true, true); 373 if (Tok.is(tok::semi)) 374 ConsumeToken(); 375 return DG; 376} 377 378/// \brief Parse 'declaration' after parsing 'declaration-specifiers 379/// declarator'. This method parses the remainder of the declaration 380/// (including any attributes or initializer, among other things) and 381/// finalizes the declaration. 382/// 383/// init-declarator: [C99 6.7] 384/// declarator 385/// declarator '=' initializer 386/// [GNU] declarator simple-asm-expr[opt] attributes[opt] 387/// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer 388/// [C++] declarator initializer[opt] 389/// 390/// [C++] initializer: 391/// [C++] '=' initializer-clause 392/// [C++] '(' expression-list ')' 393/// [C++0x] '=' 'default' [TODO] 394/// [C++0x] '=' 'delete' 395/// 396/// According to the standard grammar, =default and =delete are function 397/// definitions, but that definitely doesn't fit with the parser here. 398/// 399Parser::DeclPtrTy Parser::ParseDeclarationAfterDeclarator(Declarator &D, 400 const ParsedTemplateInfo &TemplateInfo) { 401 // If a simple-asm-expr is present, parse it. 402 if (Tok.is(tok::kw_asm)) { 403 SourceLocation Loc; 404 OwningExprResult AsmLabel(ParseSimpleAsm(&Loc)); 405 if (AsmLabel.isInvalid()) { 406 SkipUntil(tok::semi, true, true); 407 return DeclPtrTy(); 408 } 409 410 D.setAsmLabel(AsmLabel.release()); 411 D.SetRangeEnd(Loc); 412 } 413 414 // If attributes are present, parse them. 415 if (Tok.is(tok::kw___attribute)) { 416 SourceLocation Loc; 417 AttributeList *AttrList = ParseAttributes(&Loc); 418 D.AddAttributes(AttrList, Loc); 419 } 420 421 // Inform the current actions module that we just parsed this declarator. 422 DeclPtrTy ThisDecl; 423 switch (TemplateInfo.Kind) { 424 case ParsedTemplateInfo::NonTemplate: 425 ThisDecl = Actions.ActOnDeclarator(CurScope, D); 426 break; 427 428 case ParsedTemplateInfo::Template: 429 case ParsedTemplateInfo::ExplicitSpecialization: 430 ThisDecl = Actions.ActOnTemplateDeclarator(CurScope, 431 Action::MultiTemplateParamsArg(Actions, 432 TemplateInfo.TemplateParams->data(), 433 TemplateInfo.TemplateParams->size()), 434 D); 435 break; 436 437 case ParsedTemplateInfo::ExplicitInstantiation: { 438 Action::DeclResult ThisRes 439 = Actions.ActOnExplicitInstantiation(CurScope, 440 TemplateInfo.ExternLoc, 441 TemplateInfo.TemplateLoc, 442 D); 443 if (ThisRes.isInvalid()) { 444 SkipUntil(tok::semi, true, true); 445 return DeclPtrTy(); 446 } 447 448 ThisDecl = ThisRes.get(); 449 break; 450 } 451 } 452 453 // Parse declarator '=' initializer. 454 if (Tok.is(tok::equal)) { 455 ConsumeToken(); 456 if (getLang().CPlusPlus0x && Tok.is(tok::kw_delete)) { 457 SourceLocation DelLoc = ConsumeToken(); 458 Actions.SetDeclDeleted(ThisDecl, DelLoc); 459 } else { 460 if (getLang().CPlusPlus) 461 Actions.ActOnCXXEnterDeclInitializer(CurScope, ThisDecl); 462 463 OwningExprResult Init(ParseInitializer()); 464 465 if (getLang().CPlusPlus) 466 Actions.ActOnCXXExitDeclInitializer(CurScope, ThisDecl); 467 468 if (Init.isInvalid()) { 469 SkipUntil(tok::semi, true, true); 470 return DeclPtrTy(); 471 } 472 Actions.AddInitializerToDecl(ThisDecl, move(Init)); 473 } 474 } else if (Tok.is(tok::l_paren)) { 475 // Parse C++ direct initializer: '(' expression-list ')' 476 SourceLocation LParenLoc = ConsumeParen(); 477 ExprVector Exprs(Actions); 478 CommaLocsTy CommaLocs; 479 480 if (ParseExpressionList(Exprs, CommaLocs)) { 481 SkipUntil(tok::r_paren); 482 } else { 483 // Match the ')'. 484 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 485 486 assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() && 487 "Unexpected number of commas!"); 488 Actions.AddCXXDirectInitializerToDecl(ThisDecl, LParenLoc, 489 move_arg(Exprs), 490 CommaLocs.data(), RParenLoc); 491 } 492 } else { 493 bool TypeContainsUndeducedAuto = 494 D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto; 495 Actions.ActOnUninitializedDecl(ThisDecl, TypeContainsUndeducedAuto); 496 } 497 498 return ThisDecl; 499} 500 501/// ParseInitDeclaratorListAfterFirstDeclarator - Parse 'declaration' after 502/// parsing 'declaration-specifiers declarator'. This method is split out this 503/// way to handle the ambiguity between top-level function-definitions and 504/// declarations. 505/// 506/// init-declarator-list: [C99 6.7] 507/// init-declarator 508/// init-declarator-list ',' init-declarator 509/// 510/// According to the standard grammar, =default and =delete are function 511/// definitions, but that definitely doesn't fit with the parser here. 512/// 513Parser::DeclGroupPtrTy Parser:: 514ParseInitDeclaratorListAfterFirstDeclarator(Declarator &D) { 515 // Declarators may be grouped together ("int X, *Y, Z();"). Remember the decls 516 // that we parse together here. 517 llvm::SmallVector<DeclPtrTy, 8> DeclsInGroup; 518 519 // At this point, we know that it is not a function definition. Parse the 520 // rest of the init-declarator-list. 521 while (1) { 522 DeclPtrTy ThisDecl = ParseDeclarationAfterDeclarator(D); 523 if (ThisDecl.get()) 524 DeclsInGroup.push_back(ThisDecl); 525 526 // If we don't have a comma, it is either the end of the list (a ';') or an 527 // error, bail out. 528 if (Tok.isNot(tok::comma)) 529 break; 530 531 // Consume the comma. 532 ConsumeToken(); 533 534 // Parse the next declarator. 535 D.clear(); 536 537 // Accept attributes in an init-declarator. In the first declarator in a 538 // declaration, these would be part of the declspec. In subsequent 539 // declarators, they become part of the declarator itself, so that they 540 // don't apply to declarators after *this* one. Examples: 541 // short __attribute__((common)) var; -> declspec 542 // short var __attribute__((common)); -> declarator 543 // short x, __attribute__((common)) var; -> declarator 544 if (Tok.is(tok::kw___attribute)) { 545 SourceLocation Loc; 546 AttributeList *AttrList = ParseAttributes(&Loc); 547 D.AddAttributes(AttrList, Loc); 548 } 549 550 ParseDeclarator(D); 551 } 552 553 return Actions.FinalizeDeclaratorGroup(CurScope, D.getDeclSpec(), 554 DeclsInGroup.data(), 555 DeclsInGroup.size()); 556} 557 558/// ParseSpecifierQualifierList 559/// specifier-qualifier-list: 560/// type-specifier specifier-qualifier-list[opt] 561/// type-qualifier specifier-qualifier-list[opt] 562/// [GNU] attributes specifier-qualifier-list[opt] 563/// 564void Parser::ParseSpecifierQualifierList(DeclSpec &DS) { 565 /// specifier-qualifier-list is a subset of declaration-specifiers. Just 566 /// parse declaration-specifiers and complain about extra stuff. 567 ParseDeclarationSpecifiers(DS); 568 569 // Validate declspec for type-name. 570 unsigned Specs = DS.getParsedSpecifiers(); 571 if (Specs == DeclSpec::PQ_None && !DS.getNumProtocolQualifiers() && 572 !DS.getAttributes()) 573 Diag(Tok, diag::err_typename_requires_specqual); 574 575 // Issue diagnostic and remove storage class if present. 576 if (Specs & DeclSpec::PQ_StorageClassSpecifier) { 577 if (DS.getStorageClassSpecLoc().isValid()) 578 Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass); 579 else 580 Diag(DS.getThreadSpecLoc(), diag::err_typename_invalid_storageclass); 581 DS.ClearStorageClassSpecs(); 582 } 583 584 // Issue diagnostic and remove function specfier if present. 585 if (Specs & DeclSpec::PQ_FunctionSpecifier) { 586 if (DS.isInlineSpecified()) 587 Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec); 588 if (DS.isVirtualSpecified()) 589 Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec); 590 if (DS.isExplicitSpecified()) 591 Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec); 592 DS.ClearFunctionSpecs(); 593 } 594} 595 596/// isValidAfterIdentifierInDeclaratorAfterDeclSpec - Return true if the 597/// specified token is valid after the identifier in a declarator which 598/// immediately follows the declspec. For example, these things are valid: 599/// 600/// int x [ 4]; // direct-declarator 601/// int x ( int y); // direct-declarator 602/// int(int x ) // direct-declarator 603/// int x ; // simple-declaration 604/// int x = 17; // init-declarator-list 605/// int x , y; // init-declarator-list 606/// int x __asm__ ("foo"); // init-declarator-list 607/// int x : 4; // struct-declarator 608/// int x { 5}; // C++'0x unified initializers 609/// 610/// This is not, because 'x' does not immediately follow the declspec (though 611/// ')' happens to be valid anyway). 612/// int (x) 613/// 614static bool isValidAfterIdentifierInDeclarator(const Token &T) { 615 return T.is(tok::l_square) || T.is(tok::l_paren) || T.is(tok::r_paren) || 616 T.is(tok::semi) || T.is(tok::comma) || T.is(tok::equal) || 617 T.is(tok::kw_asm) || T.is(tok::l_brace) || T.is(tok::colon); 618} 619 620 621/// ParseImplicitInt - This method is called when we have an non-typename 622/// identifier in a declspec (which normally terminates the decl spec) when 623/// the declspec has no type specifier. In this case, the declspec is either 624/// malformed or is "implicit int" (in K&R and C89). 625/// 626/// This method handles diagnosing this prettily and returns false if the 627/// declspec is done being processed. If it recovers and thinks there may be 628/// other pieces of declspec after it, it returns true. 629/// 630bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS, 631 const ParsedTemplateInfo &TemplateInfo, 632 AccessSpecifier AS) { 633 assert(Tok.is(tok::identifier) && "should have identifier"); 634 635 SourceLocation Loc = Tok.getLocation(); 636 // If we see an identifier that is not a type name, we normally would 637 // parse it as the identifer being declared. However, when a typename 638 // is typo'd or the definition is not included, this will incorrectly 639 // parse the typename as the identifier name and fall over misparsing 640 // later parts of the diagnostic. 641 // 642 // As such, we try to do some look-ahead in cases where this would 643 // otherwise be an "implicit-int" case to see if this is invalid. For 644 // example: "static foo_t x = 4;" In this case, if we parsed foo_t as 645 // an identifier with implicit int, we'd get a parse error because the 646 // next token is obviously invalid for a type. Parse these as a case 647 // with an invalid type specifier. 648 assert(!DS.hasTypeSpecifier() && "Type specifier checked above"); 649 650 // Since we know that this either implicit int (which is rare) or an 651 // error, we'd do lookahead to try to do better recovery. 652 if (isValidAfterIdentifierInDeclarator(NextToken())) { 653 // If this token is valid for implicit int, e.g. "static x = 4", then 654 // we just avoid eating the identifier, so it will be parsed as the 655 // identifier in the declarator. 656 return false; 657 } 658 659 // Otherwise, if we don't consume this token, we are going to emit an 660 // error anyway. Try to recover from various common problems. Check 661 // to see if this was a reference to a tag name without a tag specified. 662 // This is a common problem in C (saying 'foo' instead of 'struct foo'). 663 // 664 // C++ doesn't need this, and isTagName doesn't take SS. 665 if (SS == 0) { 666 const char *TagName = 0; 667 tok::TokenKind TagKind = tok::unknown; 668 669 switch (Actions.isTagName(*Tok.getIdentifierInfo(), CurScope)) { 670 default: break; 671 case DeclSpec::TST_enum: TagName="enum" ;TagKind=tok::kw_enum ;break; 672 case DeclSpec::TST_union: TagName="union" ;TagKind=tok::kw_union ;break; 673 case DeclSpec::TST_struct:TagName="struct";TagKind=tok::kw_struct;break; 674 case DeclSpec::TST_class: TagName="class" ;TagKind=tok::kw_class ;break; 675 } 676 677 if (TagName) { 678 Diag(Loc, diag::err_use_of_tag_name_without_tag) 679 << Tok.getIdentifierInfo() << TagName 680 << CodeModificationHint::CreateInsertion(Tok.getLocation(),TagName); 681 682 // Parse this as a tag as if the missing tag were present. 683 if (TagKind == tok::kw_enum) 684 ParseEnumSpecifier(Loc, DS, AS); 685 else 686 ParseClassSpecifier(TagKind, Loc, DS, TemplateInfo, AS); 687 return true; 688 } 689 } 690 691 // Since this is almost certainly an invalid type name, emit a 692 // diagnostic that says it, eat the token, and mark the declspec as 693 // invalid. 694 SourceRange R; 695 if (SS) R = SS->getRange(); 696 697 Diag(Loc, diag::err_unknown_typename) << Tok.getIdentifierInfo() << R; 698 const char *PrevSpec; 699 unsigned DiagID; 700 DS.SetTypeSpecType(DeclSpec::TST_error, Loc, PrevSpec, DiagID); 701 DS.SetRangeEnd(Tok.getLocation()); 702 ConsumeToken(); 703 704 // TODO: Could inject an invalid typedef decl in an enclosing scope to 705 // avoid rippling error messages on subsequent uses of the same type, 706 // could be useful if #include was forgotten. 707 return false; 708} 709 710/// ParseDeclarationSpecifiers 711/// declaration-specifiers: [C99 6.7] 712/// storage-class-specifier declaration-specifiers[opt] 713/// type-specifier declaration-specifiers[opt] 714/// [C99] function-specifier declaration-specifiers[opt] 715/// [GNU] attributes declaration-specifiers[opt] 716/// 717/// storage-class-specifier: [C99 6.7.1] 718/// 'typedef' 719/// 'extern' 720/// 'static' 721/// 'auto' 722/// 'register' 723/// [C++] 'mutable' 724/// [GNU] '__thread' 725/// function-specifier: [C99 6.7.4] 726/// [C99] 'inline' 727/// [C++] 'virtual' 728/// [C++] 'explicit' 729/// 'friend': [C++ dcl.friend] 730 731/// 732void Parser::ParseDeclarationSpecifiers(DeclSpec &DS, 733 const ParsedTemplateInfo &TemplateInfo, 734 AccessSpecifier AS, 735 DeclSpecContext DSContext) { 736 if (Tok.is(tok::code_completion)) { 737 Actions.CodeCompleteOrdinaryName(CurScope); 738 ConsumeToken(); 739 } 740 741 DS.SetRangeStart(Tok.getLocation()); 742 while (1) { 743 bool isInvalid = false; 744 const char *PrevSpec = 0; 745 unsigned DiagID = 0; 746 747 SourceLocation Loc = Tok.getLocation(); 748 749 switch (Tok.getKind()) { 750 default: 751 DoneWithDeclSpec: 752 // If this is not a declaration specifier token, we're done reading decl 753 // specifiers. First verify that DeclSpec's are consistent. 754 DS.Finish(Diags, PP); 755 return; 756 757 case tok::coloncolon: // ::foo::bar 758 // Annotate C++ scope specifiers. If we get one, loop. 759 if (TryAnnotateCXXScopeToken(true)) 760 continue; 761 goto DoneWithDeclSpec; 762 763 case tok::annot_cxxscope: { 764 if (DS.hasTypeSpecifier()) 765 goto DoneWithDeclSpec; 766 767 // We are looking for a qualified typename. 768 Token Next = NextToken(); 769 if (Next.is(tok::annot_template_id) && 770 static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()) 771 ->Kind == TNK_Type_template) { 772 // We have a qualified template-id, e.g., N::A<int> 773 CXXScopeSpec SS; 774 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, true); 775 assert(Tok.is(tok::annot_template_id) && 776 "ParseOptionalCXXScopeSpecifier not working"); 777 AnnotateTemplateIdTokenAsType(&SS); 778 continue; 779 } 780 781 if (Next.isNot(tok::identifier)) 782 goto DoneWithDeclSpec; 783 784 CXXScopeSpec SS; 785 SS.setScopeRep(Tok.getAnnotationValue()); 786 SS.setRange(Tok.getAnnotationRange()); 787 788 // If the next token is the name of the class type that the C++ scope 789 // denotes, followed by a '(', then this is a constructor declaration. 790 // We're done with the decl-specifiers. 791 if (Actions.isCurrentClassName(*Next.getIdentifierInfo(), 792 CurScope, &SS) && 793 GetLookAheadToken(2).is(tok::l_paren)) 794 goto DoneWithDeclSpec; 795 796 TypeTy *TypeRep = Actions.getTypeName(*Next.getIdentifierInfo(), 797 Next.getLocation(), CurScope, &SS); 798 799 // If the referenced identifier is not a type, then this declspec is 800 // erroneous: We already checked about that it has no type specifier, and 801 // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the 802 // typename. 803 if (TypeRep == 0) { 804 ConsumeToken(); // Eat the scope spec so the identifier is current. 805 if (ParseImplicitInt(DS, &SS, TemplateInfo, AS)) continue; 806 goto DoneWithDeclSpec; 807 } 808 809 ConsumeToken(); // The C++ scope. 810 811 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 812 DiagID, TypeRep); 813 if (isInvalid) 814 break; 815 816 DS.SetRangeEnd(Tok.getLocation()); 817 ConsumeToken(); // The typename. 818 819 continue; 820 } 821 822 case tok::annot_typename: { 823 if (Tok.getAnnotationValue()) 824 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 825 DiagID, Tok.getAnnotationValue()); 826 else 827 DS.SetTypeSpecError(); 828 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 829 ConsumeToken(); // The typename 830 831 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 832 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 833 // Objective-C interface. If we don't have Objective-C or a '<', this is 834 // just a normal reference to a typedef name. 835 if (!Tok.is(tok::less) || !getLang().ObjC1) 836 continue; 837 838 SourceLocation EndProtoLoc; 839 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 840 ParseObjCProtocolReferences(ProtocolDecl, false, EndProtoLoc); 841 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size()); 842 843 DS.SetRangeEnd(EndProtoLoc); 844 continue; 845 } 846 847 // typedef-name 848 case tok::identifier: { 849 // In C++, check to see if this is a scope specifier like foo::bar::, if 850 // so handle it as such. This is important for ctor parsing. 851 if (getLang().CPlusPlus && TryAnnotateCXXScopeToken(true)) 852 continue; 853 854 // This identifier can only be a typedef name if we haven't already seen 855 // a type-specifier. Without this check we misparse: 856 // typedef int X; struct Y { short X; }; as 'short int'. 857 if (DS.hasTypeSpecifier()) 858 goto DoneWithDeclSpec; 859 860 // It has to be available as a typedef too! 861 TypeTy *TypeRep = Actions.getTypeName(*Tok.getIdentifierInfo(), 862 Tok.getLocation(), CurScope); 863 864 // If this is not a typedef name, don't parse it as part of the declspec, 865 // it must be an implicit int or an error. 866 if (TypeRep == 0) { 867 if (ParseImplicitInt(DS, 0, TemplateInfo, AS)) continue; 868 goto DoneWithDeclSpec; 869 } 870 871 // C++: If the identifier is actually the name of the class type 872 // being defined and the next token is a '(', then this is a 873 // constructor declaration. We're done with the decl-specifiers 874 // and will treat this token as an identifier. 875 if (getLang().CPlusPlus && 876 (CurScope->isClassScope() || 877 (CurScope->isTemplateParamScope() && 878 CurScope->getParent()->isClassScope())) && 879 Actions.isCurrentClassName(*Tok.getIdentifierInfo(), CurScope) && 880 NextToken().getKind() == tok::l_paren) 881 goto DoneWithDeclSpec; 882 883 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 884 DiagID, TypeRep); 885 if (isInvalid) 886 break; 887 888 DS.SetRangeEnd(Tok.getLocation()); 889 ConsumeToken(); // The identifier 890 891 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 892 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 893 // Objective-C interface. If we don't have Objective-C or a '<', this is 894 // just a normal reference to a typedef name. 895 if (!Tok.is(tok::less) || !getLang().ObjC1) 896 continue; 897 898 SourceLocation EndProtoLoc; 899 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 900 ParseObjCProtocolReferences(ProtocolDecl, false, EndProtoLoc); 901 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size()); 902 903 DS.SetRangeEnd(EndProtoLoc); 904 905 // Need to support trailing type qualifiers (e.g. "id<p> const"). 906 // If a type specifier follows, it will be diagnosed elsewhere. 907 continue; 908 } 909 910 // type-name 911 case tok::annot_template_id: { 912 TemplateIdAnnotation *TemplateId 913 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 914 if (TemplateId->Kind != TNK_Type_template) { 915 // This template-id does not refer to a type name, so we're 916 // done with the type-specifiers. 917 goto DoneWithDeclSpec; 918 } 919 920 // Turn the template-id annotation token into a type annotation 921 // token, then try again to parse it as a type-specifier. 922 AnnotateTemplateIdTokenAsType(); 923 continue; 924 } 925 926 // GNU attributes support. 927 case tok::kw___attribute: 928 DS.AddAttributes(ParseAttributes()); 929 continue; 930 931 // Microsoft declspec support. 932 case tok::kw___declspec: 933 DS.AddAttributes(ParseMicrosoftDeclSpec()); 934 continue; 935 936 // Microsoft single token adornments. 937 case tok::kw___forceinline: 938 // FIXME: Add handling here! 939 break; 940 941 case tok::kw___ptr64: 942 case tok::kw___w64: 943 case tok::kw___cdecl: 944 case tok::kw___stdcall: 945 case tok::kw___fastcall: 946 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 947 continue; 948 949 // storage-class-specifier 950 case tok::kw_typedef: 951 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_typedef, Loc, PrevSpec, 952 DiagID); 953 break; 954 case tok::kw_extern: 955 if (DS.isThreadSpecified()) 956 Diag(Tok, diag::ext_thread_before) << "extern"; 957 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_extern, Loc, PrevSpec, 958 DiagID); 959 break; 960 case tok::kw___private_extern__: 961 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_private_extern, Loc, 962 PrevSpec, DiagID); 963 break; 964 case tok::kw_static: 965 if (DS.isThreadSpecified()) 966 Diag(Tok, diag::ext_thread_before) << "static"; 967 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_static, Loc, PrevSpec, 968 DiagID); 969 break; 970 case tok::kw_auto: 971 if (getLang().CPlusPlus0x) 972 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, 973 DiagID); 974 else 975 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_auto, Loc, PrevSpec, 976 DiagID); 977 break; 978 case tok::kw_register: 979 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_register, Loc, PrevSpec, 980 DiagID); 981 break; 982 case tok::kw_mutable: 983 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_mutable, Loc, PrevSpec, 984 DiagID); 985 break; 986 case tok::kw___thread: 987 isInvalid = DS.SetStorageClassSpecThread(Loc, PrevSpec, DiagID); 988 break; 989 990 // function-specifier 991 case tok::kw_inline: 992 isInvalid = DS.SetFunctionSpecInline(Loc, PrevSpec, DiagID); 993 break; 994 case tok::kw_virtual: 995 isInvalid = DS.SetFunctionSpecVirtual(Loc, PrevSpec, DiagID); 996 break; 997 case tok::kw_explicit: 998 isInvalid = DS.SetFunctionSpecExplicit(Loc, PrevSpec, DiagID); 999 break; 1000 1001 // friend 1002 case tok::kw_friend: 1003 if (DSContext == DSC_class) 1004 isInvalid = DS.SetFriendSpec(Loc, PrevSpec, DiagID); 1005 else { 1006 PrevSpec = ""; // not actually used by the diagnostic 1007 DiagID = diag::err_friend_invalid_in_context; 1008 isInvalid = true; 1009 } 1010 break; 1011 1012 // type-specifier 1013 case tok::kw_short: 1014 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, 1015 DiagID); 1016 break; 1017 case tok::kw_long: 1018 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long) 1019 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, 1020 DiagID); 1021 else 1022 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 1023 DiagID); 1024 break; 1025 case tok::kw_signed: 1026 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, 1027 DiagID); 1028 break; 1029 case tok::kw_unsigned: 1030 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, 1031 DiagID); 1032 break; 1033 case tok::kw__Complex: 1034 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec, 1035 DiagID); 1036 break; 1037 case tok::kw__Imaginary: 1038 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec, 1039 DiagID); 1040 break; 1041 case tok::kw_void: 1042 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, 1043 DiagID); 1044 break; 1045 case tok::kw_char: 1046 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, 1047 DiagID); 1048 break; 1049 case tok::kw_int: 1050 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, 1051 DiagID); 1052 break; 1053 case tok::kw_float: 1054 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, 1055 DiagID); 1056 break; 1057 case tok::kw_double: 1058 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, 1059 DiagID); 1060 break; 1061 case tok::kw_wchar_t: 1062 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, 1063 DiagID); 1064 break; 1065 case tok::kw_char16_t: 1066 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, 1067 DiagID); 1068 break; 1069 case tok::kw_char32_t: 1070 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, 1071 DiagID); 1072 break; 1073 case tok::kw_bool: 1074 case tok::kw__Bool: 1075 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, 1076 DiagID); 1077 break; 1078 case tok::kw__Decimal32: 1079 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec, 1080 DiagID); 1081 break; 1082 case tok::kw__Decimal64: 1083 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec, 1084 DiagID); 1085 break; 1086 case tok::kw__Decimal128: 1087 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec, 1088 DiagID); 1089 break; 1090 1091 // class-specifier: 1092 case tok::kw_class: 1093 case tok::kw_struct: 1094 case tok::kw_union: { 1095 tok::TokenKind Kind = Tok.getKind(); 1096 ConsumeToken(); 1097 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS); 1098 continue; 1099 } 1100 1101 // enum-specifier: 1102 case tok::kw_enum: 1103 ConsumeToken(); 1104 ParseEnumSpecifier(Loc, DS, AS); 1105 continue; 1106 1107 // cv-qualifier: 1108 case tok::kw_const: 1109 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec, DiagID, 1110 getLang()); 1111 break; 1112 case tok::kw_volatile: 1113 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID, 1114 getLang()); 1115 break; 1116 case tok::kw_restrict: 1117 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID, 1118 getLang()); 1119 break; 1120 1121 // C++ typename-specifier: 1122 case tok::kw_typename: 1123 if (TryAnnotateTypeOrScopeToken()) 1124 continue; 1125 break; 1126 1127 // GNU typeof support. 1128 case tok::kw_typeof: 1129 ParseTypeofSpecifier(DS); 1130 continue; 1131 1132 case tok::kw_decltype: 1133 ParseDecltypeSpecifier(DS); 1134 continue; 1135 1136 case tok::less: 1137 // GCC ObjC supports types like "<SomeProtocol>" as a synonym for 1138 // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous, 1139 // but we support it. 1140 if (DS.hasTypeSpecifier() || !getLang().ObjC1) 1141 goto DoneWithDeclSpec; 1142 1143 { 1144 SourceLocation EndProtoLoc; 1145 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1146 ParseObjCProtocolReferences(ProtocolDecl, false, EndProtoLoc); 1147 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size()); 1148 DS.SetRangeEnd(EndProtoLoc); 1149 1150 Diag(Loc, diag::warn_objc_protocol_qualifier_missing_id) 1151 << CodeModificationHint::CreateInsertion(Loc, "id") 1152 << SourceRange(Loc, EndProtoLoc); 1153 // Need to support trailing type qualifiers (e.g. "id<p> const"). 1154 // If a type specifier follows, it will be diagnosed elsewhere. 1155 continue; 1156 } 1157 } 1158 // If the specifier wasn't legal, issue a diagnostic. 1159 if (isInvalid) { 1160 assert(PrevSpec && "Method did not return previous specifier!"); 1161 assert(DiagID); 1162 Diag(Tok, DiagID) << PrevSpec; 1163 } 1164 DS.SetRangeEnd(Tok.getLocation()); 1165 ConsumeToken(); 1166 } 1167} 1168 1169/// ParseOptionalTypeSpecifier - Try to parse a single type-specifier. We 1170/// primarily follow the C++ grammar with additions for C99 and GNU, 1171/// which together subsume the C grammar. Note that the C++ 1172/// type-specifier also includes the C type-qualifier (for const, 1173/// volatile, and C99 restrict). Returns true if a type-specifier was 1174/// found (and parsed), false otherwise. 1175/// 1176/// type-specifier: [C++ 7.1.5] 1177/// simple-type-specifier 1178/// class-specifier 1179/// enum-specifier 1180/// elaborated-type-specifier [TODO] 1181/// cv-qualifier 1182/// 1183/// cv-qualifier: [C++ 7.1.5.1] 1184/// 'const' 1185/// 'volatile' 1186/// [C99] 'restrict' 1187/// 1188/// simple-type-specifier: [ C++ 7.1.5.2] 1189/// '::'[opt] nested-name-specifier[opt] type-name [TODO] 1190/// '::'[opt] nested-name-specifier 'template' template-id [TODO] 1191/// 'char' 1192/// 'wchar_t' 1193/// 'bool' 1194/// 'short' 1195/// 'int' 1196/// 'long' 1197/// 'signed' 1198/// 'unsigned' 1199/// 'float' 1200/// 'double' 1201/// 'void' 1202/// [C99] '_Bool' 1203/// [C99] '_Complex' 1204/// [C99] '_Imaginary' // Removed in TC2? 1205/// [GNU] '_Decimal32' 1206/// [GNU] '_Decimal64' 1207/// [GNU] '_Decimal128' 1208/// [GNU] typeof-specifier 1209/// [OBJC] class-name objc-protocol-refs[opt] [TODO] 1210/// [OBJC] typedef-name objc-protocol-refs[opt] [TODO] 1211/// [C++0x] 'decltype' ( expression ) 1212bool Parser::ParseOptionalTypeSpecifier(DeclSpec &DS, bool& isInvalid, 1213 const char *&PrevSpec, 1214 unsigned &DiagID, 1215 const ParsedTemplateInfo &TemplateInfo) { 1216 SourceLocation Loc = Tok.getLocation(); 1217 1218 switch (Tok.getKind()) { 1219 case tok::identifier: // foo::bar 1220 case tok::kw_typename: // typename foo::bar 1221 // Annotate typenames and C++ scope specifiers. If we get one, just 1222 // recurse to handle whatever we get. 1223 if (TryAnnotateTypeOrScopeToken()) 1224 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID, 1225 TemplateInfo); 1226 // Otherwise, not a type specifier. 1227 return false; 1228 case tok::coloncolon: // ::foo::bar 1229 if (NextToken().is(tok::kw_new) || // ::new 1230 NextToken().is(tok::kw_delete)) // ::delete 1231 return false; 1232 1233 // Annotate typenames and C++ scope specifiers. If we get one, just 1234 // recurse to handle whatever we get. 1235 if (TryAnnotateTypeOrScopeToken()) 1236 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID, 1237 TemplateInfo); 1238 // Otherwise, not a type specifier. 1239 return false; 1240 1241 // simple-type-specifier: 1242 case tok::annot_typename: { 1243 if (Tok.getAnnotationValue()) 1244 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1245 DiagID, Tok.getAnnotationValue()); 1246 else 1247 DS.SetTypeSpecError(); 1248 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 1249 ConsumeToken(); // The typename 1250 1251 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1252 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1253 // Objective-C interface. If we don't have Objective-C or a '<', this is 1254 // just a normal reference to a typedef name. 1255 if (!Tok.is(tok::less) || !getLang().ObjC1) 1256 return true; 1257 1258 SourceLocation EndProtoLoc; 1259 llvm::SmallVector<DeclPtrTy, 8> ProtocolDecl; 1260 ParseObjCProtocolReferences(ProtocolDecl, false, EndProtoLoc); 1261 DS.setProtocolQualifiers(ProtocolDecl.data(), ProtocolDecl.size()); 1262 1263 DS.SetRangeEnd(EndProtoLoc); 1264 return true; 1265 } 1266 1267 case tok::kw_short: 1268 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, DiagID); 1269 break; 1270 case tok::kw_long: 1271 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long) 1272 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, 1273 DiagID); 1274 else 1275 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 1276 DiagID); 1277 break; 1278 case tok::kw_signed: 1279 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, DiagID); 1280 break; 1281 case tok::kw_unsigned: 1282 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, 1283 DiagID); 1284 break; 1285 case tok::kw__Complex: 1286 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec, 1287 DiagID); 1288 break; 1289 case tok::kw__Imaginary: 1290 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec, 1291 DiagID); 1292 break; 1293 case tok::kw_void: 1294 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, DiagID); 1295 break; 1296 case tok::kw_char: 1297 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, DiagID); 1298 break; 1299 case tok::kw_int: 1300 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, DiagID); 1301 break; 1302 case tok::kw_float: 1303 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, DiagID); 1304 break; 1305 case tok::kw_double: 1306 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, DiagID); 1307 break; 1308 case tok::kw_wchar_t: 1309 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, DiagID); 1310 break; 1311 case tok::kw_char16_t: 1312 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, DiagID); 1313 break; 1314 case tok::kw_char32_t: 1315 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, DiagID); 1316 break; 1317 case tok::kw_bool: 1318 case tok::kw__Bool: 1319 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, DiagID); 1320 break; 1321 case tok::kw__Decimal32: 1322 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec, 1323 DiagID); 1324 break; 1325 case tok::kw__Decimal64: 1326 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec, 1327 DiagID); 1328 break; 1329 case tok::kw__Decimal128: 1330 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec, 1331 DiagID); 1332 break; 1333 1334 // class-specifier: 1335 case tok::kw_class: 1336 case tok::kw_struct: 1337 case tok::kw_union: { 1338 tok::TokenKind Kind = Tok.getKind(); 1339 ConsumeToken(); 1340 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo); 1341 return true; 1342 } 1343 1344 // enum-specifier: 1345 case tok::kw_enum: 1346 ConsumeToken(); 1347 ParseEnumSpecifier(Loc, DS); 1348 return true; 1349 1350 // cv-qualifier: 1351 case tok::kw_const: 1352 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, 1353 DiagID, getLang()); 1354 break; 1355 case tok::kw_volatile: 1356 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, 1357 DiagID, getLang()); 1358 break; 1359 case tok::kw_restrict: 1360 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, 1361 DiagID, getLang()); 1362 break; 1363 1364 // GNU typeof support. 1365 case tok::kw_typeof: 1366 ParseTypeofSpecifier(DS); 1367 return true; 1368 1369 // C++0x decltype support. 1370 case tok::kw_decltype: 1371 ParseDecltypeSpecifier(DS); 1372 return true; 1373 1374 // C++0x auto support. 1375 case tok::kw_auto: 1376 if (!getLang().CPlusPlus0x) 1377 return false; 1378 1379 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, DiagID); 1380 break; 1381 case tok::kw___ptr64: 1382 case tok::kw___w64: 1383 case tok::kw___cdecl: 1384 case tok::kw___stdcall: 1385 case tok::kw___fastcall: 1386 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 1387 return true; 1388 1389 default: 1390 // Not a type-specifier; do nothing. 1391 return false; 1392 } 1393 1394 // If the specifier combination wasn't legal, issue a diagnostic. 1395 if (isInvalid) { 1396 assert(PrevSpec && "Method did not return previous specifier!"); 1397 // Pick between error or extwarn. 1398 Diag(Tok, DiagID) << PrevSpec; 1399 } 1400 DS.SetRangeEnd(Tok.getLocation()); 1401 ConsumeToken(); // whatever we parsed above. 1402 return true; 1403} 1404 1405/// ParseStructDeclaration - Parse a struct declaration without the terminating 1406/// semicolon. 1407/// 1408/// struct-declaration: 1409/// specifier-qualifier-list struct-declarator-list 1410/// [GNU] __extension__ struct-declaration 1411/// [GNU] specifier-qualifier-list 1412/// struct-declarator-list: 1413/// struct-declarator 1414/// struct-declarator-list ',' struct-declarator 1415/// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator 1416/// struct-declarator: 1417/// declarator 1418/// [GNU] declarator attributes[opt] 1419/// declarator[opt] ':' constant-expression 1420/// [GNU] declarator[opt] ':' constant-expression attributes[opt] 1421/// 1422void Parser:: 1423ParseStructDeclaration(DeclSpec &DS, 1424 llvm::SmallVectorImpl<FieldDeclarator> &Fields) { 1425 if (Tok.is(tok::kw___extension__)) { 1426 // __extension__ silences extension warnings in the subexpression. 1427 ExtensionRAIIObject O(Diags); // Use RAII to do this. 1428 ConsumeToken(); 1429 return ParseStructDeclaration(DS, Fields); 1430 } 1431 1432 // Parse the common specifier-qualifiers-list piece. 1433 SourceLocation DSStart = Tok.getLocation(); 1434 ParseSpecifierQualifierList(DS); 1435 1436 // If there are no declarators, this is a free-standing declaration 1437 // specifier. Let the actions module cope with it. 1438 if (Tok.is(tok::semi)) { 1439 Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 1440 return; 1441 } 1442 1443 // Read struct-declarators until we find the semicolon. 1444 Fields.push_back(FieldDeclarator(DS)); 1445 while (1) { 1446 FieldDeclarator &DeclaratorInfo = Fields.back(); 1447 1448 /// struct-declarator: declarator 1449 /// struct-declarator: declarator[opt] ':' constant-expression 1450 if (Tok.isNot(tok::colon)) 1451 ParseDeclarator(DeclaratorInfo.D); 1452 1453 if (Tok.is(tok::colon)) { 1454 ConsumeToken(); 1455 OwningExprResult Res(ParseConstantExpression()); 1456 if (Res.isInvalid()) 1457 SkipUntil(tok::semi, true, true); 1458 else 1459 DeclaratorInfo.BitfieldSize = Res.release(); 1460 } 1461 1462 // If attributes exist after the declarator, parse them. 1463 if (Tok.is(tok::kw___attribute)) { 1464 SourceLocation Loc; 1465 AttributeList *AttrList = ParseAttributes(&Loc); 1466 DeclaratorInfo.D.AddAttributes(AttrList, Loc); 1467 } 1468 1469 // If we don't have a comma, it is either the end of the list (a ';') 1470 // or an error, bail out. 1471 if (Tok.isNot(tok::comma)) 1472 return; 1473 1474 // Consume the comma. 1475 ConsumeToken(); 1476 1477 // Parse the next declarator. 1478 Fields.push_back(FieldDeclarator(DS)); 1479 1480 // Attributes are only allowed on the second declarator. 1481 if (Tok.is(tok::kw___attribute)) { 1482 SourceLocation Loc; 1483 AttributeList *AttrList = ParseAttributes(&Loc); 1484 Fields.back().D.AddAttributes(AttrList, Loc); 1485 } 1486 } 1487} 1488 1489/// ParseStructUnionBody 1490/// struct-contents: 1491/// struct-declaration-list 1492/// [EXT] empty 1493/// [GNU] "struct-declaration-list" without terminatoring ';' 1494/// struct-declaration-list: 1495/// struct-declaration 1496/// struct-declaration-list struct-declaration 1497/// [OBC] '@' 'defs' '(' class-name ')' 1498/// 1499void Parser::ParseStructUnionBody(SourceLocation RecordLoc, 1500 unsigned TagType, DeclPtrTy TagDecl) { 1501 PrettyStackTraceActionsDecl CrashInfo(TagDecl, RecordLoc, Actions, 1502 PP.getSourceManager(), 1503 "parsing struct/union body"); 1504 1505 SourceLocation LBraceLoc = ConsumeBrace(); 1506 1507 ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope); 1508 Actions.ActOnTagStartDefinition(CurScope, TagDecl); 1509 1510 // Empty structs are an extension in C (C99 6.7.2.1p7), but are allowed in 1511 // C++. 1512 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus) 1513 Diag(Tok, diag::ext_empty_struct_union_enum) 1514 << DeclSpec::getSpecifierName((DeclSpec::TST)TagType); 1515 1516 llvm::SmallVector<DeclPtrTy, 32> FieldDecls; 1517 llvm::SmallVector<FieldDeclarator, 8> FieldDeclarators; 1518 1519 // While we still have something to read, read the declarations in the struct. 1520 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 1521 // Each iteration of this loop reads one struct-declaration. 1522 1523 // Check for extraneous top-level semicolon. 1524 if (Tok.is(tok::semi)) { 1525 Diag(Tok, diag::ext_extra_struct_semi) 1526 << CodeModificationHint::CreateRemoval(SourceRange(Tok.getLocation())); 1527 ConsumeToken(); 1528 continue; 1529 } 1530 1531 // Parse all the comma separated declarators. 1532 DeclSpec DS; 1533 FieldDeclarators.clear(); 1534 if (!Tok.is(tok::at)) { 1535 ParseStructDeclaration(DS, FieldDeclarators); 1536 1537 // Convert them all to fields. 1538 for (unsigned i = 0, e = FieldDeclarators.size(); i != e; ++i) { 1539 FieldDeclarator &FD = FieldDeclarators[i]; 1540 DeclPtrTy Field; 1541 // Install the declarator into the current TagDecl. 1542 if (FD.D.getExtension()) { 1543 // Silences extension warnings 1544 ExtensionRAIIObject O(Diags); 1545 Field = Actions.ActOnField(CurScope, TagDecl, 1546 DS.getSourceRange().getBegin(), 1547 FD.D, FD.BitfieldSize); 1548 } else { 1549 Field = Actions.ActOnField(CurScope, TagDecl, 1550 DS.getSourceRange().getBegin(), 1551 FD.D, FD.BitfieldSize); 1552 } 1553 FieldDecls.push_back(Field); 1554 } 1555 } else { // Handle @defs 1556 ConsumeToken(); 1557 if (!Tok.isObjCAtKeyword(tok::objc_defs)) { 1558 Diag(Tok, diag::err_unexpected_at); 1559 SkipUntil(tok::semi, true, true); 1560 continue; 1561 } 1562 ConsumeToken(); 1563 ExpectAndConsume(tok::l_paren, diag::err_expected_lparen); 1564 if (!Tok.is(tok::identifier)) { 1565 Diag(Tok, diag::err_expected_ident); 1566 SkipUntil(tok::semi, true, true); 1567 continue; 1568 } 1569 llvm::SmallVector<DeclPtrTy, 16> Fields; 1570 Actions.ActOnDefs(CurScope, TagDecl, Tok.getLocation(), 1571 Tok.getIdentifierInfo(), Fields); 1572 FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end()); 1573 ConsumeToken(); 1574 ExpectAndConsume(tok::r_paren, diag::err_expected_rparen); 1575 } 1576 1577 if (Tok.is(tok::semi)) { 1578 ConsumeToken(); 1579 } else if (Tok.is(tok::r_brace)) { 1580 Diag(Tok, diag::ext_expected_semi_decl_list); 1581 break; 1582 } else { 1583 Diag(Tok, diag::err_expected_semi_decl_list); 1584 // Skip to end of block or statement 1585 SkipUntil(tok::r_brace, true, true); 1586 } 1587 } 1588 1589 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 1590 1591 AttributeList *AttrList = 0; 1592 // If attributes exist after struct contents, parse them. 1593 if (Tok.is(tok::kw___attribute)) 1594 AttrList = ParseAttributes(); 1595 1596 Actions.ActOnFields(CurScope, 1597 RecordLoc, TagDecl, FieldDecls.data(), FieldDecls.size(), 1598 LBraceLoc, RBraceLoc, 1599 AttrList); 1600 StructScope.Exit(); 1601 Actions.ActOnTagFinishDefinition(CurScope, TagDecl, RBraceLoc); 1602} 1603 1604 1605/// ParseEnumSpecifier 1606/// enum-specifier: [C99 6.7.2.2] 1607/// 'enum' identifier[opt] '{' enumerator-list '}' 1608///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}' 1609/// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt] 1610/// '}' attributes[opt] 1611/// 'enum' identifier 1612/// [GNU] 'enum' attributes[opt] identifier 1613/// 1614/// [C++] elaborated-type-specifier: 1615/// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier 1616/// 1617void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS, 1618 AccessSpecifier AS) { 1619 // Parse the tag portion of this. 1620 if (Tok.is(tok::code_completion)) { 1621 // Code completion for an enum name. 1622 Actions.CodeCompleteTag(CurScope, DeclSpec::TST_enum); 1623 ConsumeToken(); 1624 } 1625 1626 AttributeList *Attr = 0; 1627 // If attributes exist after tag, parse them. 1628 if (Tok.is(tok::kw___attribute)) 1629 Attr = ParseAttributes(); 1630 1631 CXXScopeSpec SS; 1632 if (getLang().CPlusPlus && ParseOptionalCXXScopeSpecifier(SS, 0, false)) { 1633 if (Tok.isNot(tok::identifier)) { 1634 Diag(Tok, diag::err_expected_ident); 1635 if (Tok.isNot(tok::l_brace)) { 1636 // Has no name and is not a definition. 1637 // Skip the rest of this declarator, up until the comma or semicolon. 1638 SkipUntil(tok::comma, true); 1639 return; 1640 } 1641 } 1642 } 1643 1644 // Must have either 'enum name' or 'enum {...}'. 1645 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace)) { 1646 Diag(Tok, diag::err_expected_ident_lbrace); 1647 1648 // Skip the rest of this declarator, up until the comma or semicolon. 1649 SkipUntil(tok::comma, true); 1650 return; 1651 } 1652 1653 // If an identifier is present, consume and remember it. 1654 IdentifierInfo *Name = 0; 1655 SourceLocation NameLoc; 1656 if (Tok.is(tok::identifier)) { 1657 Name = Tok.getIdentifierInfo(); 1658 NameLoc = ConsumeToken(); 1659 } 1660 1661 // There are three options here. If we have 'enum foo;', then this is a 1662 // forward declaration. If we have 'enum foo {...' then this is a 1663 // definition. Otherwise we have something like 'enum foo xyz', a reference. 1664 // 1665 // This is needed to handle stuff like this right (C99 6.7.2.3p11): 1666 // enum foo {..}; void bar() { enum foo; } <- new foo in bar. 1667 // enum foo {..}; void bar() { enum foo x; } <- use of old foo. 1668 // 1669 Action::TagUseKind TUK; 1670 if (Tok.is(tok::l_brace)) 1671 TUK = Action::TUK_Definition; 1672 else if (Tok.is(tok::semi)) 1673 TUK = Action::TUK_Declaration; 1674 else 1675 TUK = Action::TUK_Reference; 1676 bool Owned = false; 1677 bool IsDependent = false; 1678 DeclPtrTy TagDecl = Actions.ActOnTag(CurScope, DeclSpec::TST_enum, TUK, 1679 StartLoc, SS, Name, NameLoc, Attr, AS, 1680 Action::MultiTemplateParamsArg(Actions), 1681 Owned, IsDependent); 1682 assert(!IsDependent && "didn't expect dependent enum"); 1683 1684 if (Tok.is(tok::l_brace)) 1685 ParseEnumBody(StartLoc, TagDecl); 1686 1687 // TODO: semantic analysis on the declspec for enums. 1688 const char *PrevSpec = 0; 1689 unsigned DiagID; 1690 if (DS.SetTypeSpecType(DeclSpec::TST_enum, StartLoc, PrevSpec, DiagID, 1691 TagDecl.getAs<void>(), Owned)) 1692 Diag(StartLoc, DiagID) << PrevSpec; 1693} 1694 1695/// ParseEnumBody - Parse a {} enclosed enumerator-list. 1696/// enumerator-list: 1697/// enumerator 1698/// enumerator-list ',' enumerator 1699/// enumerator: 1700/// enumeration-constant 1701/// enumeration-constant '=' constant-expression 1702/// enumeration-constant: 1703/// identifier 1704/// 1705void Parser::ParseEnumBody(SourceLocation StartLoc, DeclPtrTy EnumDecl) { 1706 // Enter the scope of the enum body and start the definition. 1707 ParseScope EnumScope(this, Scope::DeclScope); 1708 Actions.ActOnTagStartDefinition(CurScope, EnumDecl); 1709 1710 SourceLocation LBraceLoc = ConsumeBrace(); 1711 1712 // C does not allow an empty enumerator-list, C++ does [dcl.enum]. 1713 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus) 1714 Diag(Tok, diag::ext_empty_struct_union_enum) << "enum"; 1715 1716 llvm::SmallVector<DeclPtrTy, 32> EnumConstantDecls; 1717 1718 DeclPtrTy LastEnumConstDecl; 1719 1720 // Parse the enumerator-list. 1721 while (Tok.is(tok::identifier)) { 1722 IdentifierInfo *Ident = Tok.getIdentifierInfo(); 1723 SourceLocation IdentLoc = ConsumeToken(); 1724 1725 SourceLocation EqualLoc; 1726 OwningExprResult AssignedVal(Actions); 1727 if (Tok.is(tok::equal)) { 1728 EqualLoc = ConsumeToken(); 1729 AssignedVal = ParseConstantExpression(); 1730 if (AssignedVal.isInvalid()) 1731 SkipUntil(tok::comma, tok::r_brace, true, true); 1732 } 1733 1734 // Install the enumerator constant into EnumDecl. 1735 DeclPtrTy EnumConstDecl = Actions.ActOnEnumConstant(CurScope, EnumDecl, 1736 LastEnumConstDecl, 1737 IdentLoc, Ident, 1738 EqualLoc, 1739 AssignedVal.release()); 1740 EnumConstantDecls.push_back(EnumConstDecl); 1741 LastEnumConstDecl = EnumConstDecl; 1742 1743 if (Tok.isNot(tok::comma)) 1744 break; 1745 SourceLocation CommaLoc = ConsumeToken(); 1746 1747 if (Tok.isNot(tok::identifier) && 1748 !(getLang().C99 || getLang().CPlusPlus0x)) 1749 Diag(CommaLoc, diag::ext_enumerator_list_comma) 1750 << getLang().CPlusPlus 1751 << CodeModificationHint::CreateRemoval((SourceRange(CommaLoc))); 1752 } 1753 1754 // Eat the }. 1755 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 1756 1757 AttributeList *Attr = 0; 1758 // If attributes exist after the identifier list, parse them. 1759 if (Tok.is(tok::kw___attribute)) 1760 Attr = ParseAttributes(); 1761 1762 Actions.ActOnEnumBody(StartLoc, LBraceLoc, RBraceLoc, EnumDecl, 1763 EnumConstantDecls.data(), EnumConstantDecls.size(), 1764 CurScope, Attr); 1765 1766 EnumScope.Exit(); 1767 Actions.ActOnTagFinishDefinition(CurScope, EnumDecl, RBraceLoc); 1768} 1769 1770/// isTypeSpecifierQualifier - Return true if the current token could be the 1771/// start of a type-qualifier-list. 1772bool Parser::isTypeQualifier() const { 1773 switch (Tok.getKind()) { 1774 default: return false; 1775 // type-qualifier 1776 case tok::kw_const: 1777 case tok::kw_volatile: 1778 case tok::kw_restrict: 1779 return true; 1780 } 1781} 1782 1783/// isTypeSpecifierQualifier - Return true if the current token could be the 1784/// start of a specifier-qualifier-list. 1785bool Parser::isTypeSpecifierQualifier() { 1786 switch (Tok.getKind()) { 1787 default: return false; 1788 1789 case tok::identifier: // foo::bar 1790 case tok::kw_typename: // typename T::type 1791 // Annotate typenames and C++ scope specifiers. If we get one, just 1792 // recurse to handle whatever we get. 1793 if (TryAnnotateTypeOrScopeToken()) 1794 return isTypeSpecifierQualifier(); 1795 // Otherwise, not a type specifier. 1796 return false; 1797 1798 case tok::coloncolon: // ::foo::bar 1799 if (NextToken().is(tok::kw_new) || // ::new 1800 NextToken().is(tok::kw_delete)) // ::delete 1801 return false; 1802 1803 // Annotate typenames and C++ scope specifiers. If we get one, just 1804 // recurse to handle whatever we get. 1805 if (TryAnnotateTypeOrScopeToken()) 1806 return isTypeSpecifierQualifier(); 1807 // Otherwise, not a type specifier. 1808 return false; 1809 1810 // GNU attributes support. 1811 case tok::kw___attribute: 1812 // GNU typeof support. 1813 case tok::kw_typeof: 1814 1815 // type-specifiers 1816 case tok::kw_short: 1817 case tok::kw_long: 1818 case tok::kw_signed: 1819 case tok::kw_unsigned: 1820 case tok::kw__Complex: 1821 case tok::kw__Imaginary: 1822 case tok::kw_void: 1823 case tok::kw_char: 1824 case tok::kw_wchar_t: 1825 case tok::kw_char16_t: 1826 case tok::kw_char32_t: 1827 case tok::kw_int: 1828 case tok::kw_float: 1829 case tok::kw_double: 1830 case tok::kw_bool: 1831 case tok::kw__Bool: 1832 case tok::kw__Decimal32: 1833 case tok::kw__Decimal64: 1834 case tok::kw__Decimal128: 1835 1836 // struct-or-union-specifier (C99) or class-specifier (C++) 1837 case tok::kw_class: 1838 case tok::kw_struct: 1839 case tok::kw_union: 1840 // enum-specifier 1841 case tok::kw_enum: 1842 1843 // type-qualifier 1844 case tok::kw_const: 1845 case tok::kw_volatile: 1846 case tok::kw_restrict: 1847 1848 // typedef-name 1849 case tok::annot_typename: 1850 return true; 1851 1852 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'. 1853 case tok::less: 1854 return getLang().ObjC1; 1855 1856 case tok::kw___cdecl: 1857 case tok::kw___stdcall: 1858 case tok::kw___fastcall: 1859 case tok::kw___w64: 1860 case tok::kw___ptr64: 1861 return true; 1862 } 1863} 1864 1865/// isDeclarationSpecifier() - Return true if the current token is part of a 1866/// declaration specifier. 1867bool Parser::isDeclarationSpecifier() { 1868 switch (Tok.getKind()) { 1869 default: return false; 1870 1871 case tok::identifier: // foo::bar 1872 // Unfortunate hack to support "Class.factoryMethod" notation. 1873 if (getLang().ObjC1 && NextToken().is(tok::period)) 1874 return false; 1875 // Fall through 1876 1877 case tok::kw_typename: // typename T::type 1878 // Annotate typenames and C++ scope specifiers. If we get one, just 1879 // recurse to handle whatever we get. 1880 if (TryAnnotateTypeOrScopeToken()) 1881 return isDeclarationSpecifier(); 1882 // Otherwise, not a declaration specifier. 1883 return false; 1884 case tok::coloncolon: // ::foo::bar 1885 if (NextToken().is(tok::kw_new) || // ::new 1886 NextToken().is(tok::kw_delete)) // ::delete 1887 return false; 1888 1889 // Annotate typenames and C++ scope specifiers. If we get one, just 1890 // recurse to handle whatever we get. 1891 if (TryAnnotateTypeOrScopeToken()) 1892 return isDeclarationSpecifier(); 1893 // Otherwise, not a declaration specifier. 1894 return false; 1895 1896 // storage-class-specifier 1897 case tok::kw_typedef: 1898 case tok::kw_extern: 1899 case tok::kw___private_extern__: 1900 case tok::kw_static: 1901 case tok::kw_auto: 1902 case tok::kw_register: 1903 case tok::kw___thread: 1904 1905 // type-specifiers 1906 case tok::kw_short: 1907 case tok::kw_long: 1908 case tok::kw_signed: 1909 case tok::kw_unsigned: 1910 case tok::kw__Complex: 1911 case tok::kw__Imaginary: 1912 case tok::kw_void: 1913 case tok::kw_char: 1914 case tok::kw_wchar_t: 1915 case tok::kw_char16_t: 1916 case tok::kw_char32_t: 1917 1918 case tok::kw_int: 1919 case tok::kw_float: 1920 case tok::kw_double: 1921 case tok::kw_bool: 1922 case tok::kw__Bool: 1923 case tok::kw__Decimal32: 1924 case tok::kw__Decimal64: 1925 case tok::kw__Decimal128: 1926 1927 // struct-or-union-specifier (C99) or class-specifier (C++) 1928 case tok::kw_class: 1929 case tok::kw_struct: 1930 case tok::kw_union: 1931 // enum-specifier 1932 case tok::kw_enum: 1933 1934 // type-qualifier 1935 case tok::kw_const: 1936 case tok::kw_volatile: 1937 case tok::kw_restrict: 1938 1939 // function-specifier 1940 case tok::kw_inline: 1941 case tok::kw_virtual: 1942 case tok::kw_explicit: 1943 1944 // typedef-name 1945 case tok::annot_typename: 1946 1947 // GNU typeof support. 1948 case tok::kw_typeof: 1949 1950 // GNU attributes. 1951 case tok::kw___attribute: 1952 return true; 1953 1954 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'. 1955 case tok::less: 1956 return getLang().ObjC1; 1957 1958 case tok::kw___declspec: 1959 case tok::kw___cdecl: 1960 case tok::kw___stdcall: 1961 case tok::kw___fastcall: 1962 case tok::kw___w64: 1963 case tok::kw___ptr64: 1964 case tok::kw___forceinline: 1965 return true; 1966 } 1967} 1968 1969 1970/// ParseTypeQualifierListOpt 1971/// type-qualifier-list: [C99 6.7.5] 1972/// type-qualifier 1973/// [GNU] attributes [ only if AttributesAllowed=true ] 1974/// type-qualifier-list type-qualifier 1975/// [GNU] type-qualifier-list attributes [ only if AttributesAllowed=true ] 1976/// 1977void Parser::ParseTypeQualifierListOpt(DeclSpec &DS, bool AttributesAllowed) { 1978 while (1) { 1979 bool isInvalid = false; 1980 const char *PrevSpec = 0; 1981 unsigned DiagID = 0; 1982 SourceLocation Loc = Tok.getLocation(); 1983 1984 switch (Tok.getKind()) { 1985 case tok::kw_const: 1986 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, DiagID, 1987 getLang()); 1988 break; 1989 case tok::kw_volatile: 1990 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID, 1991 getLang()); 1992 break; 1993 case tok::kw_restrict: 1994 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID, 1995 getLang()); 1996 break; 1997 case tok::kw___w64: 1998 case tok::kw___ptr64: 1999 case tok::kw___cdecl: 2000 case tok::kw___stdcall: 2001 case tok::kw___fastcall: 2002 if (AttributesAllowed) { 2003 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 2004 continue; 2005 } 2006 goto DoneWithTypeQuals; 2007 case tok::kw___attribute: 2008 if (AttributesAllowed) { 2009 DS.AddAttributes(ParseAttributes()); 2010 continue; // do *not* consume the next token! 2011 } 2012 // otherwise, FALL THROUGH! 2013 default: 2014 DoneWithTypeQuals: 2015 // If this is not a type-qualifier token, we're done reading type 2016 // qualifiers. First verify that DeclSpec's are consistent. 2017 DS.Finish(Diags, PP); 2018 return; 2019 } 2020 2021 // If the specifier combination wasn't legal, issue a diagnostic. 2022 if (isInvalid) { 2023 assert(PrevSpec && "Method did not return previous specifier!"); 2024 Diag(Tok, DiagID) << PrevSpec; 2025 } 2026 ConsumeToken(); 2027 } 2028} 2029 2030 2031/// ParseDeclarator - Parse and verify a newly-initialized declarator. 2032/// 2033void Parser::ParseDeclarator(Declarator &D) { 2034 /// This implements the 'declarator' production in the C grammar, then checks 2035 /// for well-formedness and issues diagnostics. 2036 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator); 2037} 2038 2039/// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator 2040/// is parsed by the function passed to it. Pass null, and the direct-declarator 2041/// isn't parsed at all, making this function effectively parse the C++ 2042/// ptr-operator production. 2043/// 2044/// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl] 2045/// [C] pointer[opt] direct-declarator 2046/// [C++] direct-declarator 2047/// [C++] ptr-operator declarator 2048/// 2049/// pointer: [C99 6.7.5] 2050/// '*' type-qualifier-list[opt] 2051/// '*' type-qualifier-list[opt] pointer 2052/// 2053/// ptr-operator: 2054/// '*' cv-qualifier-seq[opt] 2055/// '&' 2056/// [C++0x] '&&' 2057/// [GNU] '&' restrict[opt] attributes[opt] 2058/// [GNU?] '&&' restrict[opt] attributes[opt] 2059/// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt] 2060void Parser::ParseDeclaratorInternal(Declarator &D, 2061 DirectDeclParseFunction DirectDeclParser) { 2062 2063 if (Diags.hasAllExtensionsSilenced()) 2064 D.setExtension(); 2065 // C++ member pointers start with a '::' or a nested-name. 2066 // Member pointers get special handling, since there's no place for the 2067 // scope spec in the generic path below. 2068 if (getLang().CPlusPlus && 2069 (Tok.is(tok::coloncolon) || Tok.is(tok::identifier) || 2070 Tok.is(tok::annot_cxxscope))) { 2071 CXXScopeSpec SS; 2072 if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, true)) { 2073 if (Tok.isNot(tok::star)) { 2074 // The scope spec really belongs to the direct-declarator. 2075 D.getCXXScopeSpec() = SS; 2076 if (DirectDeclParser) 2077 (this->*DirectDeclParser)(D); 2078 return; 2079 } 2080 2081 SourceLocation Loc = ConsumeToken(); 2082 D.SetRangeEnd(Loc); 2083 DeclSpec DS; 2084 ParseTypeQualifierListOpt(DS); 2085 D.ExtendWithDeclSpec(DS); 2086 2087 // Recurse to parse whatever is left. 2088 ParseDeclaratorInternal(D, DirectDeclParser); 2089 2090 // Sema will have to catch (syntactically invalid) pointers into global 2091 // scope. It has to catch pointers into namespace scope anyway. 2092 D.AddTypeInfo(DeclaratorChunk::getMemberPointer(SS,DS.getTypeQualifiers(), 2093 Loc, DS.TakeAttributes()), 2094 /* Don't replace range end. */SourceLocation()); 2095 return; 2096 } 2097 } 2098 2099 tok::TokenKind Kind = Tok.getKind(); 2100 // Not a pointer, C++ reference, or block. 2101 if (Kind != tok::star && Kind != tok::caret && 2102 (Kind != tok::amp || !getLang().CPlusPlus) && 2103 // We parse rvalue refs in C++03, because otherwise the errors are scary. 2104 (Kind != tok::ampamp || !getLang().CPlusPlus)) { 2105 if (DirectDeclParser) 2106 (this->*DirectDeclParser)(D); 2107 return; 2108 } 2109 2110 // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference, 2111 // '&&' -> rvalue reference 2112 SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&. 2113 D.SetRangeEnd(Loc); 2114 2115 if (Kind == tok::star || Kind == tok::caret) { 2116 // Is a pointer. 2117 DeclSpec DS; 2118 2119 ParseTypeQualifierListOpt(DS); 2120 D.ExtendWithDeclSpec(DS); 2121 2122 // Recursively parse the declarator. 2123 ParseDeclaratorInternal(D, DirectDeclParser); 2124 if (Kind == tok::star) 2125 // Remember that we parsed a pointer type, and remember the type-quals. 2126 D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc, 2127 DS.TakeAttributes()), 2128 SourceLocation()); 2129 else 2130 // Remember that we parsed a Block type, and remember the type-quals. 2131 D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(), 2132 Loc, DS.TakeAttributes()), 2133 SourceLocation()); 2134 } else { 2135 // Is a reference 2136 DeclSpec DS; 2137 2138 // Complain about rvalue references in C++03, but then go on and build 2139 // the declarator. 2140 if (Kind == tok::ampamp && !getLang().CPlusPlus0x) 2141 Diag(Loc, diag::err_rvalue_reference); 2142 2143 // C++ 8.3.2p1: cv-qualified references are ill-formed except when the 2144 // cv-qualifiers are introduced through the use of a typedef or of a 2145 // template type argument, in which case the cv-qualifiers are ignored. 2146 // 2147 // [GNU] Retricted references are allowed. 2148 // [GNU] Attributes on references are allowed. 2149 ParseTypeQualifierListOpt(DS); 2150 D.ExtendWithDeclSpec(DS); 2151 2152 if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) { 2153 if (DS.getTypeQualifiers() & DeclSpec::TQ_const) 2154 Diag(DS.getConstSpecLoc(), 2155 diag::err_invalid_reference_qualifier_application) << "const"; 2156 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) 2157 Diag(DS.getVolatileSpecLoc(), 2158 diag::err_invalid_reference_qualifier_application) << "volatile"; 2159 } 2160 2161 // Recursively parse the declarator. 2162 ParseDeclaratorInternal(D, DirectDeclParser); 2163 2164 if (D.getNumTypeObjects() > 0) { 2165 // C++ [dcl.ref]p4: There shall be no references to references. 2166 DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1); 2167 if (InnerChunk.Kind == DeclaratorChunk::Reference) { 2168 if (const IdentifierInfo *II = D.getIdentifier()) 2169 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference) 2170 << II; 2171 else 2172 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference) 2173 << "type name"; 2174 2175 // Once we've complained about the reference-to-reference, we 2176 // can go ahead and build the (technically ill-formed) 2177 // declarator: reference collapsing will take care of it. 2178 } 2179 } 2180 2181 // Remember that we parsed a reference type. It doesn't have type-quals. 2182 D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc, 2183 DS.TakeAttributes(), 2184 Kind == tok::amp), 2185 SourceLocation()); 2186 } 2187} 2188 2189/// ParseDirectDeclarator 2190/// direct-declarator: [C99 6.7.5] 2191/// [C99] identifier 2192/// '(' declarator ')' 2193/// [GNU] '(' attributes declarator ')' 2194/// [C90] direct-declarator '[' constant-expression[opt] ']' 2195/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']' 2196/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']' 2197/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']' 2198/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']' 2199/// direct-declarator '(' parameter-type-list ')' 2200/// direct-declarator '(' identifier-list[opt] ')' 2201/// [GNU] direct-declarator '(' parameter-forward-declarations 2202/// parameter-type-list[opt] ')' 2203/// [C++] direct-declarator '(' parameter-declaration-clause ')' 2204/// cv-qualifier-seq[opt] exception-specification[opt] 2205/// [C++] declarator-id 2206/// 2207/// declarator-id: [C++ 8] 2208/// id-expression 2209/// '::'[opt] nested-name-specifier[opt] type-name 2210/// 2211/// id-expression: [C++ 5.1] 2212/// unqualified-id 2213/// qualified-id 2214/// 2215/// unqualified-id: [C++ 5.1] 2216/// identifier 2217/// operator-function-id 2218/// conversion-function-id 2219/// '~' class-name 2220/// template-id 2221/// 2222void Parser::ParseDirectDeclarator(Declarator &D) { 2223 DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec()); 2224 2225 if (getLang().CPlusPlus) { 2226 if (D.mayHaveIdentifier()) { 2227 // ParseDeclaratorInternal might already have parsed the scope. 2228 bool afterCXXScope = D.getCXXScopeSpec().isSet() || 2229 ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec(), /*ObjectType=*/0, 2230 true); 2231 if (afterCXXScope) { 2232 // Change the declaration context for name lookup, until this function 2233 // is exited (and the declarator has been parsed). 2234 DeclScopeObj.EnterDeclaratorScope(); 2235 } 2236 2237 if (Tok.is(tok::identifier)) { 2238 assert(Tok.getIdentifierInfo() && "Not an identifier?"); 2239 2240 // If this identifier is the name of the current class, it's a 2241 // constructor name. 2242 if (!D.getDeclSpec().hasTypeSpecifier() && 2243 Actions.isCurrentClassName(*Tok.getIdentifierInfo(),CurScope)) { 2244 CXXScopeSpec *SS = afterCXXScope? &D.getCXXScopeSpec() : 0; 2245 D.setConstructor(Actions.getTypeName(*Tok.getIdentifierInfo(), 2246 Tok.getLocation(), CurScope, SS), 2247 Tok.getLocation()); 2248 // This is a normal identifier. 2249 } else 2250 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 2251 ConsumeToken(); 2252 goto PastIdentifier; 2253 } else if (Tok.is(tok::annot_template_id)) { 2254 TemplateIdAnnotation *TemplateId 2255 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 2256 2257 D.setTemplateId(TemplateId); 2258 ConsumeToken(); 2259 goto PastIdentifier; 2260 } else if (Tok.is(tok::kw_operator)) { 2261 SourceLocation OperatorLoc = Tok.getLocation(); 2262 SourceLocation EndLoc; 2263 2264 // First try the name of an overloaded operator 2265 if (OverloadedOperatorKind Op = TryParseOperatorFunctionId(&EndLoc)) { 2266 D.setOverloadedOperator(Op, OperatorLoc, EndLoc); 2267 } else { 2268 // This must be a conversion function (C++ [class.conv.fct]). 2269 if (TypeTy *ConvType = ParseConversionFunctionId(&EndLoc)) 2270 D.setConversionFunction(ConvType, OperatorLoc, EndLoc); 2271 else { 2272 D.SetIdentifier(0, Tok.getLocation()); 2273 } 2274 } 2275 goto PastIdentifier; 2276 } else if (Tok.is(tok::tilde)) { 2277 // This should be a C++ destructor. 2278 SourceLocation TildeLoc = ConsumeToken(); 2279 if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id)) { 2280 // FIXME: Inaccurate. 2281 SourceLocation NameLoc = Tok.getLocation(); 2282 SourceLocation EndLoc; 2283 CXXScopeSpec *SS = afterCXXScope? &D.getCXXScopeSpec() : 0; 2284 TypeResult Type = ParseClassName(EndLoc, SS, true); 2285 if (Type.isInvalid()) 2286 D.SetIdentifier(0, TildeLoc); 2287 else 2288 D.setDestructor(Type.get(), TildeLoc, NameLoc); 2289 } else { 2290 Diag(Tok, diag::err_destructor_class_name); 2291 D.SetIdentifier(0, TildeLoc); 2292 } 2293 goto PastIdentifier; 2294 } 2295 2296 // If we reached this point, token is not identifier and not '~'. 2297 2298 if (afterCXXScope) { 2299 Diag(Tok, diag::err_expected_unqualified_id); 2300 D.SetIdentifier(0, Tok.getLocation()); 2301 D.setInvalidType(true); 2302 goto PastIdentifier; 2303 } 2304 } 2305 } 2306 2307 // If we reached this point, we are either in C/ObjC or the token didn't 2308 // satisfy any of the C++-specific checks. 2309 if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) { 2310 assert(!getLang().CPlusPlus && 2311 "There's a C++-specific check for tok::identifier above"); 2312 assert(Tok.getIdentifierInfo() && "Not an identifier?"); 2313 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 2314 ConsumeToken(); 2315 } else if (Tok.is(tok::l_paren)) { 2316 // direct-declarator: '(' declarator ')' 2317 // direct-declarator: '(' attributes declarator ')' 2318 // Example: 'char (*X)' or 'int (*XX)(void)' 2319 ParseParenDeclarator(D); 2320 } else if (D.mayOmitIdentifier()) { 2321 // This could be something simple like "int" (in which case the declarator 2322 // portion is empty), if an abstract-declarator is allowed. 2323 D.SetIdentifier(0, Tok.getLocation()); 2324 } else { 2325 if (D.getContext() == Declarator::MemberContext) 2326 Diag(Tok, diag::err_expected_member_name_or_semi) 2327 << D.getDeclSpec().getSourceRange(); 2328 else if (getLang().CPlusPlus) 2329 Diag(Tok, diag::err_expected_unqualified_id); 2330 else 2331 Diag(Tok, diag::err_expected_ident_lparen); 2332 D.SetIdentifier(0, Tok.getLocation()); 2333 D.setInvalidType(true); 2334 } 2335 2336 PastIdentifier: 2337 assert(D.isPastIdentifier() && 2338 "Haven't past the location of the identifier yet?"); 2339 2340 while (1) { 2341 if (Tok.is(tok::l_paren)) { 2342 // The paren may be part of a C++ direct initializer, eg. "int x(1);". 2343 // In such a case, check if we actually have a function declarator; if it 2344 // is not, the declarator has been fully parsed. 2345 if (getLang().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) { 2346 // When not in file scope, warn for ambiguous function declarators, just 2347 // in case the author intended it as a variable definition. 2348 bool warnIfAmbiguous = D.getContext() != Declarator::FileContext; 2349 if (!isCXXFunctionDeclarator(warnIfAmbiguous)) 2350 break; 2351 } 2352 ParseFunctionDeclarator(ConsumeParen(), D); 2353 } else if (Tok.is(tok::l_square)) { 2354 ParseBracketDeclarator(D); 2355 } else { 2356 break; 2357 } 2358 } 2359} 2360 2361/// ParseParenDeclarator - We parsed the declarator D up to a paren. This is 2362/// only called before the identifier, so these are most likely just grouping 2363/// parens for precedence. If we find that these are actually function 2364/// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator. 2365/// 2366/// direct-declarator: 2367/// '(' declarator ')' 2368/// [GNU] '(' attributes declarator ')' 2369/// direct-declarator '(' parameter-type-list ')' 2370/// direct-declarator '(' identifier-list[opt] ')' 2371/// [GNU] direct-declarator '(' parameter-forward-declarations 2372/// parameter-type-list[opt] ')' 2373/// 2374void Parser::ParseParenDeclarator(Declarator &D) { 2375 SourceLocation StartLoc = ConsumeParen(); 2376 assert(!D.isPastIdentifier() && "Should be called before passing identifier"); 2377 2378 // Eat any attributes before we look at whether this is a grouping or function 2379 // declarator paren. If this is a grouping paren, the attribute applies to 2380 // the type being built up, for example: 2381 // int (__attribute__(()) *x)(long y) 2382 // If this ends up not being a grouping paren, the attribute applies to the 2383 // first argument, for example: 2384 // int (__attribute__(()) int x) 2385 // In either case, we need to eat any attributes to be able to determine what 2386 // sort of paren this is. 2387 // 2388 AttributeList *AttrList = 0; 2389 bool RequiresArg = false; 2390 if (Tok.is(tok::kw___attribute)) { 2391 AttrList = ParseAttributes(); 2392 2393 // We require that the argument list (if this is a non-grouping paren) be 2394 // present even if the attribute list was empty. 2395 RequiresArg = true; 2396 } 2397 // Eat any Microsoft extensions. 2398 if (Tok.is(tok::kw___cdecl) || Tok.is(tok::kw___stdcall) || 2399 Tok.is(tok::kw___fastcall) || Tok.is(tok::kw___w64) || 2400 Tok.is(tok::kw___ptr64)) { 2401 AttrList = ParseMicrosoftTypeAttributes(AttrList); 2402 } 2403 2404 // If we haven't past the identifier yet (or where the identifier would be 2405 // stored, if this is an abstract declarator), then this is probably just 2406 // grouping parens. However, if this could be an abstract-declarator, then 2407 // this could also be the start of function arguments (consider 'void()'). 2408 bool isGrouping; 2409 2410 if (!D.mayOmitIdentifier()) { 2411 // If this can't be an abstract-declarator, this *must* be a grouping 2412 // paren, because we haven't seen the identifier yet. 2413 isGrouping = true; 2414 } else if (Tok.is(tok::r_paren) || // 'int()' is a function. 2415 (getLang().CPlusPlus && Tok.is(tok::ellipsis)) || // C++ int(...) 2416 isDeclarationSpecifier()) { // 'int(int)' is a function. 2417 // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is 2418 // considered to be a type, not a K&R identifier-list. 2419 isGrouping = false; 2420 } else { 2421 // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'. 2422 isGrouping = true; 2423 } 2424 2425 // If this is a grouping paren, handle: 2426 // direct-declarator: '(' declarator ')' 2427 // direct-declarator: '(' attributes declarator ')' 2428 if (isGrouping) { 2429 bool hadGroupingParens = D.hasGroupingParens(); 2430 D.setGroupingParens(true); 2431 if (AttrList) 2432 D.AddAttributes(AttrList, SourceLocation()); 2433 2434 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator); 2435 // Match the ')'. 2436 SourceLocation Loc = MatchRHSPunctuation(tok::r_paren, StartLoc); 2437 2438 D.setGroupingParens(hadGroupingParens); 2439 D.SetRangeEnd(Loc); 2440 return; 2441 } 2442 2443 // Okay, if this wasn't a grouping paren, it must be the start of a function 2444 // argument list. Recognize that this declarator will never have an 2445 // identifier (and remember where it would have been), then call into 2446 // ParseFunctionDeclarator to handle of argument list. 2447 D.SetIdentifier(0, Tok.getLocation()); 2448 2449 ParseFunctionDeclarator(StartLoc, D, AttrList, RequiresArg); 2450} 2451 2452/// ParseFunctionDeclarator - We are after the identifier and have parsed the 2453/// declarator D up to a paren, which indicates that we are parsing function 2454/// arguments. 2455/// 2456/// If AttrList is non-null, then the caller parsed those arguments immediately 2457/// after the open paren - they should be considered to be the first argument of 2458/// a parameter. If RequiresArg is true, then the first argument of the 2459/// function is required to be present and required to not be an identifier 2460/// list. 2461/// 2462/// This method also handles this portion of the grammar: 2463/// parameter-type-list: [C99 6.7.5] 2464/// parameter-list 2465/// parameter-list ',' '...' 2466/// [C++] parameter-list '...' 2467/// 2468/// parameter-list: [C99 6.7.5] 2469/// parameter-declaration 2470/// parameter-list ',' parameter-declaration 2471/// 2472/// parameter-declaration: [C99 6.7.5] 2473/// declaration-specifiers declarator 2474/// [C++] declaration-specifiers declarator '=' assignment-expression 2475/// [GNU] declaration-specifiers declarator attributes 2476/// declaration-specifiers abstract-declarator[opt] 2477/// [C++] declaration-specifiers abstract-declarator[opt] 2478/// '=' assignment-expression 2479/// [GNU] declaration-specifiers abstract-declarator[opt] attributes 2480/// 2481/// For C++, after the parameter-list, it also parses "cv-qualifier-seq[opt]" 2482/// and "exception-specification[opt]". 2483/// 2484void Parser::ParseFunctionDeclarator(SourceLocation LParenLoc, Declarator &D, 2485 AttributeList *AttrList, 2486 bool RequiresArg) { 2487 // lparen is already consumed! 2488 assert(D.isPastIdentifier() && "Should not call before identifier!"); 2489 2490 // This parameter list may be empty. 2491 if (Tok.is(tok::r_paren)) { 2492 if (RequiresArg) { 2493 Diag(Tok, diag::err_argument_required_after_attribute); 2494 delete AttrList; 2495 } 2496 2497 SourceLocation RParenLoc = ConsumeParen(); // Eat the closing ')'. 2498 SourceLocation EndLoc = RParenLoc; 2499 2500 // cv-qualifier-seq[opt]. 2501 DeclSpec DS; 2502 bool hasExceptionSpec = false; 2503 SourceLocation ThrowLoc; 2504 bool hasAnyExceptionSpec = false; 2505 llvm::SmallVector<TypeTy*, 2> Exceptions; 2506 llvm::SmallVector<SourceRange, 2> ExceptionRanges; 2507 if (getLang().CPlusPlus) { 2508 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 2509 if (!DS.getSourceRange().getEnd().isInvalid()) 2510 EndLoc = DS.getSourceRange().getEnd(); 2511 2512 // Parse exception-specification[opt]. 2513 if (Tok.is(tok::kw_throw)) { 2514 hasExceptionSpec = true; 2515 ThrowLoc = Tok.getLocation(); 2516 ParseExceptionSpecification(EndLoc, Exceptions, ExceptionRanges, 2517 hasAnyExceptionSpec); 2518 assert(Exceptions.size() == ExceptionRanges.size() && 2519 "Produced different number of exception types and ranges."); 2520 } 2521 } 2522 2523 // Remember that we parsed a function type, and remember the attributes. 2524 // int() -> no prototype, no '...'. 2525 D.AddTypeInfo(DeclaratorChunk::getFunction(/*prototype*/getLang().CPlusPlus, 2526 /*variadic*/ false, 2527 SourceLocation(), 2528 /*arglist*/ 0, 0, 2529 DS.getTypeQualifiers(), 2530 hasExceptionSpec, ThrowLoc, 2531 hasAnyExceptionSpec, 2532 Exceptions.data(), 2533 ExceptionRanges.data(), 2534 Exceptions.size(), 2535 LParenLoc, RParenLoc, D), 2536 EndLoc); 2537 return; 2538 } 2539 2540 // Alternatively, this parameter list may be an identifier list form for a 2541 // K&R-style function: void foo(a,b,c) 2542 if (!getLang().CPlusPlus && Tok.is(tok::identifier)) { 2543 if (!TryAnnotateTypeOrScopeToken()) { 2544 // K&R identifier lists can't have typedefs as identifiers, per 2545 // C99 6.7.5.3p11. 2546 if (RequiresArg) { 2547 Diag(Tok, diag::err_argument_required_after_attribute); 2548 delete AttrList; 2549 } 2550 // Identifier list. Note that '(' identifier-list ')' is only allowed for 2551 // normal declarators, not for abstract-declarators. 2552 return ParseFunctionDeclaratorIdentifierList(LParenLoc, D); 2553 } 2554 } 2555 2556 // Finally, a normal, non-empty parameter type list. 2557 2558 // Build up an array of information about the parsed arguments. 2559 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; 2560 2561 // Enter function-declaration scope, limiting any declarators to the 2562 // function prototype scope, including parameter declarators. 2563 ParseScope PrototypeScope(this, 2564 Scope::FunctionPrototypeScope|Scope::DeclScope); 2565 2566 bool IsVariadic = false; 2567 SourceLocation EllipsisLoc; 2568 while (1) { 2569 if (Tok.is(tok::ellipsis)) { 2570 IsVariadic = true; 2571 EllipsisLoc = ConsumeToken(); // Consume the ellipsis. 2572 break; 2573 } 2574 2575 SourceLocation DSStart = Tok.getLocation(); 2576 2577 // Parse the declaration-specifiers. 2578 DeclSpec DS; 2579 2580 // If the caller parsed attributes for the first argument, add them now. 2581 if (AttrList) { 2582 DS.AddAttributes(AttrList); 2583 AttrList = 0; // Only apply the attributes to the first parameter. 2584 } 2585 ParseDeclarationSpecifiers(DS); 2586 2587 // Parse the declarator. This is "PrototypeContext", because we must 2588 // accept either 'declarator' or 'abstract-declarator' here. 2589 Declarator ParmDecl(DS, Declarator::PrototypeContext); 2590 ParseDeclarator(ParmDecl); 2591 2592 // Parse GNU attributes, if present. 2593 if (Tok.is(tok::kw___attribute)) { 2594 SourceLocation Loc; 2595 AttributeList *AttrList = ParseAttributes(&Loc); 2596 ParmDecl.AddAttributes(AttrList, Loc); 2597 } 2598 2599 // Remember this parsed parameter in ParamInfo. 2600 IdentifierInfo *ParmII = ParmDecl.getIdentifier(); 2601 2602 // DefArgToks is used when the parsing of default arguments needs 2603 // to be delayed. 2604 CachedTokens *DefArgToks = 0; 2605 2606 // If no parameter was specified, verify that *something* was specified, 2607 // otherwise we have a missing type and identifier. 2608 if (DS.isEmpty() && ParmDecl.getIdentifier() == 0 && 2609 ParmDecl.getNumTypeObjects() == 0) { 2610 // Completely missing, emit error. 2611 Diag(DSStart, diag::err_missing_param); 2612 } else { 2613 // Otherwise, we have something. Add it and let semantic analysis try 2614 // to grok it and add the result to the ParamInfo we are building. 2615 2616 // Inform the actions module about the parameter declarator, so it gets 2617 // added to the current scope. 2618 DeclPtrTy Param = Actions.ActOnParamDeclarator(CurScope, ParmDecl); 2619 2620 // Parse the default argument, if any. We parse the default 2621 // arguments in all dialects; the semantic analysis in 2622 // ActOnParamDefaultArgument will reject the default argument in 2623 // C. 2624 if (Tok.is(tok::equal)) { 2625 SourceLocation EqualLoc = Tok.getLocation(); 2626 2627 // Parse the default argument 2628 if (D.getContext() == Declarator::MemberContext) { 2629 // If we're inside a class definition, cache the tokens 2630 // corresponding to the default argument. We'll actually parse 2631 // them when we see the end of the class definition. 2632 // FIXME: Templates will require something similar. 2633 // FIXME: Can we use a smart pointer for Toks? 2634 DefArgToks = new CachedTokens; 2635 2636 if (!ConsumeAndStoreUntil(tok::comma, tok::r_paren, *DefArgToks, 2637 tok::semi, false)) { 2638 delete DefArgToks; 2639 DefArgToks = 0; 2640 Actions.ActOnParamDefaultArgumentError(Param); 2641 } else 2642 Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc, 2643 (*DefArgToks)[1].getLocation()); 2644 } else { 2645 // Consume the '='. 2646 ConsumeToken(); 2647 2648 OwningExprResult DefArgResult(ParseAssignmentExpression()); 2649 if (DefArgResult.isInvalid()) { 2650 Actions.ActOnParamDefaultArgumentError(Param); 2651 SkipUntil(tok::comma, tok::r_paren, true, true); 2652 } else { 2653 // Inform the actions module about the default argument 2654 Actions.ActOnParamDefaultArgument(Param, EqualLoc, 2655 move(DefArgResult)); 2656 } 2657 } 2658 } 2659 2660 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, 2661 ParmDecl.getIdentifierLoc(), Param, 2662 DefArgToks)); 2663 } 2664 2665 // If the next token is a comma, consume it and keep reading arguments. 2666 if (Tok.isNot(tok::comma)) { 2667 if (Tok.is(tok::ellipsis)) { 2668 IsVariadic = true; 2669 EllipsisLoc = ConsumeToken(); // Consume the ellipsis. 2670 2671 if (!getLang().CPlusPlus) { 2672 // We have ellipsis without a preceding ',', which is ill-formed 2673 // in C. Complain and provide the fix. 2674 Diag(EllipsisLoc, diag::err_missing_comma_before_ellipsis) 2675 << CodeModificationHint::CreateInsertion(EllipsisLoc, ", "); 2676 } 2677 } 2678 2679 break; 2680 } 2681 2682 // Consume the comma. 2683 ConsumeToken(); 2684 } 2685 2686 // Leave prototype scope. 2687 PrototypeScope.Exit(); 2688 2689 // If we have the closing ')', eat it. 2690 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 2691 SourceLocation EndLoc = RParenLoc; 2692 2693 DeclSpec DS; 2694 bool hasExceptionSpec = false; 2695 SourceLocation ThrowLoc; 2696 bool hasAnyExceptionSpec = false; 2697 llvm::SmallVector<TypeTy*, 2> Exceptions; 2698 llvm::SmallVector<SourceRange, 2> ExceptionRanges; 2699 if (getLang().CPlusPlus) { 2700 // Parse cv-qualifier-seq[opt]. 2701 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 2702 if (!DS.getSourceRange().getEnd().isInvalid()) 2703 EndLoc = DS.getSourceRange().getEnd(); 2704 2705 // Parse exception-specification[opt]. 2706 if (Tok.is(tok::kw_throw)) { 2707 hasExceptionSpec = true; 2708 ThrowLoc = Tok.getLocation(); 2709 ParseExceptionSpecification(EndLoc, Exceptions, ExceptionRanges, 2710 hasAnyExceptionSpec); 2711 assert(Exceptions.size() == ExceptionRanges.size() && 2712 "Produced different number of exception types and ranges."); 2713 } 2714 } 2715 2716 // Remember that we parsed a function type, and remember the attributes. 2717 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/true, IsVariadic, 2718 EllipsisLoc, 2719 ParamInfo.data(), ParamInfo.size(), 2720 DS.getTypeQualifiers(), 2721 hasExceptionSpec, ThrowLoc, 2722 hasAnyExceptionSpec, 2723 Exceptions.data(), 2724 ExceptionRanges.data(), 2725 Exceptions.size(), 2726 LParenLoc, RParenLoc, D), 2727 EndLoc); 2728} 2729 2730/// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator 2731/// we found a K&R-style identifier list instead of a type argument list. The 2732/// current token is known to be the first identifier in the list. 2733/// 2734/// identifier-list: [C99 6.7.5] 2735/// identifier 2736/// identifier-list ',' identifier 2737/// 2738void Parser::ParseFunctionDeclaratorIdentifierList(SourceLocation LParenLoc, 2739 Declarator &D) { 2740 // Build up an array of information about the parsed arguments. 2741 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; 2742 llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar; 2743 2744 // If there was no identifier specified for the declarator, either we are in 2745 // an abstract-declarator, or we are in a parameter declarator which was found 2746 // to be abstract. In abstract-declarators, identifier lists are not valid: 2747 // diagnose this. 2748 if (!D.getIdentifier()) 2749 Diag(Tok, diag::ext_ident_list_in_param); 2750 2751 // Tok is known to be the first identifier in the list. Remember this 2752 // identifier in ParamInfo. 2753 ParamsSoFar.insert(Tok.getIdentifierInfo()); 2754 ParamInfo.push_back(DeclaratorChunk::ParamInfo(Tok.getIdentifierInfo(), 2755 Tok.getLocation(), 2756 DeclPtrTy())); 2757 2758 ConsumeToken(); // eat the first identifier. 2759 2760 while (Tok.is(tok::comma)) { 2761 // Eat the comma. 2762 ConsumeToken(); 2763 2764 // If this isn't an identifier, report the error and skip until ')'. 2765 if (Tok.isNot(tok::identifier)) { 2766 Diag(Tok, diag::err_expected_ident); 2767 SkipUntil(tok::r_paren); 2768 return; 2769 } 2770 2771 IdentifierInfo *ParmII = Tok.getIdentifierInfo(); 2772 2773 // Reject 'typedef int y; int test(x, y)', but continue parsing. 2774 if (Actions.getTypeName(*ParmII, Tok.getLocation(), CurScope)) 2775 Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII; 2776 2777 // Verify that the argument identifier has not already been mentioned. 2778 if (!ParamsSoFar.insert(ParmII)) { 2779 Diag(Tok, diag::err_param_redefinition) << ParmII; 2780 } else { 2781 // Remember this identifier in ParamInfo. 2782 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, 2783 Tok.getLocation(), 2784 DeclPtrTy())); 2785 } 2786 2787 // Eat the identifier. 2788 ConsumeToken(); 2789 } 2790 2791 // If we have the closing ')', eat it and we're done. 2792 SourceLocation RLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 2793 2794 // Remember that we parsed a function type, and remember the attributes. This 2795 // function type is always a K&R style function type, which is not varargs and 2796 // has no prototype. 2797 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/false, /*varargs*/false, 2798 SourceLocation(), 2799 &ParamInfo[0], ParamInfo.size(), 2800 /*TypeQuals*/0, 2801 /*exception*/false, 2802 SourceLocation(), false, 0, 0, 0, 2803 LParenLoc, RLoc, D), 2804 RLoc); 2805} 2806 2807/// [C90] direct-declarator '[' constant-expression[opt] ']' 2808/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']' 2809/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']' 2810/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']' 2811/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']' 2812void Parser::ParseBracketDeclarator(Declarator &D) { 2813 SourceLocation StartLoc = ConsumeBracket(); 2814 2815 // C array syntax has many features, but by-far the most common is [] and [4]. 2816 // This code does a fast path to handle some of the most obvious cases. 2817 if (Tok.getKind() == tok::r_square) { 2818 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 2819 // Remember that we parsed the empty array type. 2820 OwningExprResult NumElements(Actions); 2821 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, 0, 2822 StartLoc, EndLoc), 2823 EndLoc); 2824 return; 2825 } else if (Tok.getKind() == tok::numeric_constant && 2826 GetLookAheadToken(1).is(tok::r_square)) { 2827 // [4] is very common. Parse the numeric constant expression. 2828 OwningExprResult ExprRes(Actions.ActOnNumericConstant(Tok)); 2829 ConsumeToken(); 2830 2831 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 2832 2833 // If there was an error parsing the assignment-expression, recover. 2834 if (ExprRes.isInvalid()) 2835 ExprRes.release(); // Deallocate expr, just use []. 2836 2837 // Remember that we parsed a array type, and remember its features. 2838 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, 0, ExprRes.release(), 2839 StartLoc, EndLoc), 2840 EndLoc); 2841 return; 2842 } 2843 2844 // If valid, this location is the position where we read the 'static' keyword. 2845 SourceLocation StaticLoc; 2846 if (Tok.is(tok::kw_static)) 2847 StaticLoc = ConsumeToken(); 2848 2849 // If there is a type-qualifier-list, read it now. 2850 // Type qualifiers in an array subscript are a C99 feature. 2851 DeclSpec DS; 2852 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 2853 2854 // If we haven't already read 'static', check to see if there is one after the 2855 // type-qualifier-list. 2856 if (!StaticLoc.isValid() && Tok.is(tok::kw_static)) 2857 StaticLoc = ConsumeToken(); 2858 2859 // Handle "direct-declarator [ type-qual-list[opt] * ]". 2860 bool isStar = false; 2861 OwningExprResult NumElements(Actions); 2862 2863 // Handle the case where we have '[*]' as the array size. However, a leading 2864 // star could be the start of an expression, for example 'X[*p + 4]'. Verify 2865 // the the token after the star is a ']'. Since stars in arrays are 2866 // infrequent, use of lookahead is not costly here. 2867 if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) { 2868 ConsumeToken(); // Eat the '*'. 2869 2870 if (StaticLoc.isValid()) { 2871 Diag(StaticLoc, diag::err_unspecified_vla_size_with_static); 2872 StaticLoc = SourceLocation(); // Drop the static. 2873 } 2874 isStar = true; 2875 } else if (Tok.isNot(tok::r_square)) { 2876 // Note, in C89, this production uses the constant-expr production instead 2877 // of assignment-expr. The only difference is that assignment-expr allows 2878 // things like '=' and '*='. Sema rejects these in C89 mode because they 2879 // are not i-c-e's, so we don't need to distinguish between the two here. 2880 2881 // Parse the constant-expression or assignment-expression now (depending 2882 // on dialect). 2883 if (getLang().CPlusPlus) 2884 NumElements = ParseConstantExpression(); 2885 else 2886 NumElements = ParseAssignmentExpression(); 2887 } 2888 2889 // If there was an error parsing the assignment-expression, recover. 2890 if (NumElements.isInvalid()) { 2891 D.setInvalidType(true); 2892 // If the expression was invalid, skip it. 2893 SkipUntil(tok::r_square); 2894 return; 2895 } 2896 2897 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 2898 2899 // Remember that we parsed a array type, and remember its features. 2900 D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(), 2901 StaticLoc.isValid(), isStar, 2902 NumElements.release(), 2903 StartLoc, EndLoc), 2904 EndLoc); 2905} 2906 2907/// [GNU] typeof-specifier: 2908/// typeof ( expressions ) 2909/// typeof ( type-name ) 2910/// [GNU/C++] typeof unary-expression 2911/// 2912void Parser::ParseTypeofSpecifier(DeclSpec &DS) { 2913 assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier"); 2914 Token OpTok = Tok; 2915 SourceLocation StartLoc = ConsumeToken(); 2916 2917 bool isCastExpr; 2918 TypeTy *CastTy; 2919 SourceRange CastRange; 2920 OwningExprResult Operand = ParseExprAfterTypeofSizeofAlignof(OpTok, 2921 isCastExpr, 2922 CastTy, 2923 CastRange); 2924 2925 if (CastRange.getEnd().isInvalid()) 2926 // FIXME: Not accurate, the range gets one token more than it should. 2927 DS.SetRangeEnd(Tok.getLocation()); 2928 else 2929 DS.SetRangeEnd(CastRange.getEnd()); 2930 2931 if (isCastExpr) { 2932 if (!CastTy) { 2933 DS.SetTypeSpecError(); 2934 return; 2935 } 2936 2937 const char *PrevSpec = 0; 2938 unsigned DiagID; 2939 // Check for duplicate type specifiers (e.g. "int typeof(int)"). 2940 if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec, 2941 DiagID, CastTy)) 2942 Diag(StartLoc, DiagID) << PrevSpec; 2943 return; 2944 } 2945 2946 // If we get here, the operand to the typeof was an expresion. 2947 if (Operand.isInvalid()) { 2948 DS.SetTypeSpecError(); 2949 return; 2950 } 2951 2952 const char *PrevSpec = 0; 2953 unsigned DiagID; 2954 // Check for duplicate type specifiers (e.g. "int typeof(int)"). 2955 if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec, 2956 DiagID, Operand.release())) 2957 Diag(StartLoc, DiagID) << PrevSpec; 2958} 2959