ParseDecl.cpp revision 46f936e055d763437accd1e5a1bc49e7e5dbc0a3
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/Sema/Scope.h" 17#include "clang/Sema/ParsedTemplate.h" 18#include "clang/Sema/PrettyDeclStackTrace.h" 19#include "RAIIObjectsForParser.h" 20#include "llvm/ADT/SmallSet.h" 21using namespace clang; 22 23//===----------------------------------------------------------------------===// 24// C99 6.7: Declarations. 25//===----------------------------------------------------------------------===// 26 27/// ParseTypeName 28/// type-name: [C99 6.7.6] 29/// specifier-qualifier-list abstract-declarator[opt] 30/// 31/// Called type-id in C++. 32TypeResult Parser::ParseTypeName(SourceRange *Range) { 33 // Parse the common declaration-specifiers piece. 34 DeclSpec DS; 35 ParseSpecifierQualifierList(DS); 36 37 // Parse the abstract-declarator, if present. 38 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); 39 ParseDeclarator(DeclaratorInfo); 40 if (Range) 41 *Range = DeclaratorInfo.getSourceRange(); 42 43 if (DeclaratorInfo.isInvalidType()) 44 return true; 45 46 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); 47} 48 49/// ParseGNUAttributes - Parse a non-empty attributes list. 50/// 51/// [GNU] attributes: 52/// attribute 53/// attributes attribute 54/// 55/// [GNU] attribute: 56/// '__attribute__' '(' '(' attribute-list ')' ')' 57/// 58/// [GNU] attribute-list: 59/// attrib 60/// attribute_list ',' attrib 61/// 62/// [GNU] attrib: 63/// empty 64/// attrib-name 65/// attrib-name '(' identifier ')' 66/// attrib-name '(' identifier ',' nonempty-expr-list ')' 67/// attrib-name '(' argument-expression-list [C99 6.5.2] ')' 68/// 69/// [GNU] attrib-name: 70/// identifier 71/// typespec 72/// typequal 73/// storageclass 74/// 75/// FIXME: The GCC grammar/code for this construct implies we need two 76/// token lookahead. Comment from gcc: "If they start with an identifier 77/// which is followed by a comma or close parenthesis, then the arguments 78/// start with that identifier; otherwise they are an expression list." 79/// 80/// At the moment, I am not doing 2 token lookahead. I am also unaware of 81/// any attributes that don't work (based on my limited testing). Most 82/// attributes are very simple in practice. Until we find a bug, I don't see 83/// a pressing need to implement the 2 token lookahead. 84 85AttributeList *Parser::ParseGNUAttributes(SourceLocation *EndLoc) { 86 assert(Tok.is(tok::kw___attribute) && "Not a GNU attribute list!"); 87 88 AttributeList *CurrAttr = 0; 89 90 while (Tok.is(tok::kw___attribute)) { 91 ConsumeToken(); 92 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, 93 "attribute")) { 94 SkipUntil(tok::r_paren, true); // skip until ) or ; 95 return CurrAttr; 96 } 97 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, "(")) { 98 SkipUntil(tok::r_paren, true); // skip until ) or ; 99 return CurrAttr; 100 } 101 // Parse the attribute-list. e.g. __attribute__(( weak, alias("__f") )) 102 while (Tok.is(tok::identifier) || isDeclarationSpecifier() || 103 Tok.is(tok::comma)) { 104 105 if (Tok.is(tok::comma)) { 106 // allows for empty/non-empty attributes. ((__vector_size__(16),,,,)) 107 ConsumeToken(); 108 continue; 109 } 110 // we have an identifier or declaration specifier (const, int, etc.) 111 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 112 SourceLocation AttrNameLoc = ConsumeToken(); 113 114 // check if we have a "parameterized" attribute 115 if (Tok.is(tok::l_paren)) { 116 ConsumeParen(); // ignore the left paren loc for now 117 118 if (Tok.is(tok::identifier)) { 119 IdentifierInfo *ParmName = Tok.getIdentifierInfo(); 120 SourceLocation ParmLoc = ConsumeToken(); 121 122 if (Tok.is(tok::r_paren)) { 123 // __attribute__(( mode(byte) )) 124 ConsumeParen(); // ignore the right paren loc for now 125 CurrAttr = AttrFactory.Create(AttrName, AttrNameLoc, 0, AttrNameLoc, 126 ParmName, ParmLoc, 0, 0, CurrAttr); 127 } else if (Tok.is(tok::comma)) { 128 ConsumeToken(); 129 // __attribute__(( format(printf, 1, 2) )) 130 ExprVector ArgExprs(Actions); 131 bool ArgExprsOk = true; 132 133 // now parse the non-empty comma separated list of expressions 134 while (1) { 135 ExprResult ArgExpr(ParseAssignmentExpression()); 136 if (ArgExpr.isInvalid()) { 137 ArgExprsOk = false; 138 SkipUntil(tok::r_paren); 139 break; 140 } else { 141 ArgExprs.push_back(ArgExpr.release()); 142 } 143 if (Tok.isNot(tok::comma)) 144 break; 145 ConsumeToken(); // Eat the comma, move to the next argument 146 } 147 if (ArgExprsOk && Tok.is(tok::r_paren)) { 148 ConsumeParen(); // ignore the right paren loc for now 149 CurrAttr = AttrFactory.Create(AttrName, AttrNameLoc, 0, 150 AttrNameLoc, ParmName, ParmLoc, 151 ArgExprs.take(), ArgExprs.size(), 152 CurrAttr); 153 } 154 } 155 } else { // not an identifier 156 switch (Tok.getKind()) { 157 case tok::r_paren: 158 // parse a possibly empty comma separated list of expressions 159 // __attribute__(( nonnull() )) 160 ConsumeParen(); // ignore the right paren loc for now 161 CurrAttr = AttrFactory.Create(AttrName, AttrNameLoc, 0, AttrNameLoc, 162 0, SourceLocation(), 0, 0, CurrAttr); 163 break; 164 case tok::kw_char: 165 case tok::kw_wchar_t: 166 case tok::kw_char16_t: 167 case tok::kw_char32_t: 168 case tok::kw_bool: 169 case tok::kw_short: 170 case tok::kw_int: 171 case tok::kw_long: 172 case tok::kw_signed: 173 case tok::kw_unsigned: 174 case tok::kw_float: 175 case tok::kw_double: 176 case tok::kw_void: 177 case tok::kw_typeof: 178 CurrAttr = AttrFactory.Create(AttrName, AttrNameLoc, 0, AttrNameLoc, 179 0, SourceLocation(), 0, 0, CurrAttr); 180 if (CurrAttr->getKind() == AttributeList::AT_IBOutletCollection) 181 Diag(Tok, diag::err_iboutletcollection_builtintype); 182 // If it's a builtin type name, eat it and expect a rparen 183 // __attribute__(( vec_type_hint(char) )) 184 ConsumeToken(); 185 if (Tok.is(tok::r_paren)) 186 ConsumeParen(); 187 break; 188 default: 189 // __attribute__(( aligned(16) )) 190 ExprVector ArgExprs(Actions); 191 bool ArgExprsOk = true; 192 193 // now parse the list of expressions 194 while (1) { 195 ExprResult ArgExpr(ParseAssignmentExpression()); 196 if (ArgExpr.isInvalid()) { 197 ArgExprsOk = false; 198 SkipUntil(tok::r_paren); 199 break; 200 } else { 201 ArgExprs.push_back(ArgExpr.release()); 202 } 203 if (Tok.isNot(tok::comma)) 204 break; 205 ConsumeToken(); // Eat the comma, move to the next argument 206 } 207 // Match the ')'. 208 if (ArgExprsOk && Tok.is(tok::r_paren)) { 209 ConsumeParen(); // ignore the right paren loc for now 210 CurrAttr = AttrFactory.Create(AttrName, AttrNameLoc, 0, 211 AttrNameLoc, 0, SourceLocation(), ArgExprs.take(), 212 ArgExprs.size(), 213 CurrAttr); 214 } 215 break; 216 } 217 } 218 } else { 219 CurrAttr = AttrFactory.Create(AttrName, AttrNameLoc, 0, AttrNameLoc, 220 0, SourceLocation(), 0, 0, CurrAttr); 221 } 222 } 223 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) 224 SkipUntil(tok::r_paren, false); 225 SourceLocation Loc = Tok.getLocation(); 226 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) { 227 SkipUntil(tok::r_paren, false); 228 } 229 if (EndLoc) 230 *EndLoc = Loc; 231 } 232 return CurrAttr; 233} 234 235/// ParseMicrosoftDeclSpec - Parse an __declspec construct 236/// 237/// [MS] decl-specifier: 238/// __declspec ( extended-decl-modifier-seq ) 239/// 240/// [MS] extended-decl-modifier-seq: 241/// extended-decl-modifier[opt] 242/// extended-decl-modifier extended-decl-modifier-seq 243 244AttributeList* Parser::ParseMicrosoftDeclSpec(AttributeList *CurrAttr) { 245 assert(Tok.is(tok::kw___declspec) && "Not a declspec!"); 246 247 ConsumeToken(); 248 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, 249 "declspec")) { 250 SkipUntil(tok::r_paren, true); // skip until ) or ; 251 return CurrAttr; 252 } 253 while (Tok.getIdentifierInfo()) { 254 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 255 SourceLocation AttrNameLoc = ConsumeToken(); 256 if (Tok.is(tok::l_paren)) { 257 ConsumeParen(); 258 // FIXME: This doesn't parse __declspec(property(get=get_func_name)) 259 // correctly. 260 ExprResult ArgExpr(ParseAssignmentExpression()); 261 if (!ArgExpr.isInvalid()) { 262 Expr *ExprList = ArgExpr.take(); 263 CurrAttr = AttrFactory.Create(AttrName, AttrNameLoc, 0, AttrNameLoc, 0, 264 SourceLocation(), &ExprList, 1, 265 CurrAttr, true); 266 } 267 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) 268 SkipUntil(tok::r_paren, false); 269 } else { 270 CurrAttr = AttrFactory.Create(AttrName, AttrNameLoc, 0, AttrNameLoc, 271 0, SourceLocation(), 0, 0, CurrAttr, true); 272 } 273 } 274 if (ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) 275 SkipUntil(tok::r_paren, false); 276 return CurrAttr; 277} 278 279AttributeList* Parser::ParseMicrosoftTypeAttributes(AttributeList *CurrAttr) { 280 // Treat these like attributes 281 // FIXME: Allow Sema to distinguish between these and real attributes! 282 while (Tok.is(tok::kw___fastcall) || Tok.is(tok::kw___stdcall) || 283 Tok.is(tok::kw___thiscall) || Tok.is(tok::kw___cdecl) || 284 Tok.is(tok::kw___ptr64) || Tok.is(tok::kw___w64)) { 285 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 286 SourceLocation AttrNameLoc = ConsumeToken(); 287 if (Tok.is(tok::kw___ptr64) || Tok.is(tok::kw___w64)) 288 // FIXME: Support these properly! 289 continue; 290 CurrAttr = AttrFactory.Create(AttrName, AttrNameLoc, 0, AttrNameLoc, 0, 291 SourceLocation(), 0, 0, CurrAttr, true); 292 } 293 return CurrAttr; 294} 295 296AttributeList* Parser::ParseBorlandTypeAttributes(AttributeList *CurrAttr) { 297 // Treat these like attributes 298 while (Tok.is(tok::kw___pascal)) { 299 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 300 SourceLocation AttrNameLoc = ConsumeToken(); 301 CurrAttr = AttrFactory.Create(AttrName, AttrNameLoc, 0, AttrNameLoc, 0, 302 SourceLocation(), 0, 0, CurrAttr, true); 303 } 304 return CurrAttr; 305} 306 307/// ParseDeclaration - Parse a full 'declaration', which consists of 308/// declaration-specifiers, some number of declarators, and a semicolon. 309/// 'Context' should be a Declarator::TheContext value. This returns the 310/// location of the semicolon in DeclEnd. 311/// 312/// declaration: [C99 6.7] 313/// block-declaration -> 314/// simple-declaration 315/// others [FIXME] 316/// [C++] template-declaration 317/// [C++] namespace-definition 318/// [C++] using-directive 319/// [C++] using-declaration 320/// [C++0x] static_assert-declaration 321/// others... [FIXME] 322/// 323Parser::DeclGroupPtrTy Parser::ParseDeclaration(StmtVector &Stmts, 324 unsigned Context, 325 SourceLocation &DeclEnd, 326 CXX0XAttributeList Attr) { 327 ParenBraceBracketBalancer BalancerRAIIObj(*this); 328 329 Decl *SingleDecl = 0; 330 switch (Tok.getKind()) { 331 case tok::kw_template: 332 case tok::kw_export: 333 if (Attr.HasAttr) 334 Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) 335 << Attr.Range; 336 SingleDecl = ParseDeclarationStartingWithTemplate(Context, DeclEnd); 337 break; 338 case tok::kw_inline: 339 // Could be the start of an inline namespace. Allowed as an ext in C++03. 340 if (getLang().CPlusPlus && NextToken().is(tok::kw_namespace)) { 341 if (Attr.HasAttr) 342 Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) 343 << Attr.Range; 344 SourceLocation InlineLoc = ConsumeToken(); 345 SingleDecl = ParseNamespace(Context, DeclEnd, InlineLoc); 346 break; 347 } 348 return ParseSimpleDeclaration(Stmts, Context, DeclEnd, Attr.AttrList, 349 true); 350 case tok::kw_namespace: 351 if (Attr.HasAttr) 352 Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) 353 << Attr.Range; 354 SingleDecl = ParseNamespace(Context, DeclEnd); 355 break; 356 case tok::kw_using: 357 SingleDecl = ParseUsingDirectiveOrDeclaration(Context, ParsedTemplateInfo(), 358 DeclEnd, Attr); 359 break; 360 case tok::kw_static_assert: 361 if (Attr.HasAttr) 362 Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) 363 << Attr.Range; 364 SingleDecl = ParseStaticAssertDeclaration(DeclEnd); 365 break; 366 default: 367 return ParseSimpleDeclaration(Stmts, Context, DeclEnd, Attr.AttrList, 368 true); 369 } 370 371 // This routine returns a DeclGroup, if the thing we parsed only contains a 372 // single decl, convert it now. 373 return Actions.ConvertDeclToDeclGroup(SingleDecl); 374} 375 376/// simple-declaration: [C99 6.7: declaration] [C++ 7p1: dcl.dcl] 377/// declaration-specifiers init-declarator-list[opt] ';' 378///[C90/C++]init-declarator-list ';' [TODO] 379/// [OMP] threadprivate-directive [TODO] 380/// 381/// If RequireSemi is false, this does not check for a ';' at the end of the 382/// declaration. If it is true, it checks for and eats it. 383Parser::DeclGroupPtrTy Parser::ParseSimpleDeclaration(StmtVector &Stmts, 384 unsigned Context, 385 SourceLocation &DeclEnd, 386 AttributeList *Attr, 387 bool RequireSemi) { 388 // Parse the common declaration-specifiers piece. 389 ParsingDeclSpec DS(*this); 390 if (Attr) 391 DS.AddAttributes(Attr); 392 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS_none, 393 getDeclSpecContextFromDeclaratorContext(Context)); 394 StmtResult R = Actions.ActOnVlaStmt(DS); 395 if (R.isUsable()) 396 Stmts.push_back(R.release()); 397 398 // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 399 // declaration-specifiers init-declarator-list[opt] ';' 400 if (Tok.is(tok::semi)) { 401 if (RequireSemi) ConsumeToken(); 402 Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none, 403 DS); 404 DS.complete(TheDecl); 405 return Actions.ConvertDeclToDeclGroup(TheDecl); 406 } 407 408 return ParseDeclGroup(DS, Context, /*FunctionDefs=*/ false, &DeclEnd); 409} 410 411/// ParseDeclGroup - Having concluded that this is either a function 412/// definition or a group of object declarations, actually parse the 413/// result. 414Parser::DeclGroupPtrTy Parser::ParseDeclGroup(ParsingDeclSpec &DS, 415 unsigned Context, 416 bool AllowFunctionDefinitions, 417 SourceLocation *DeclEnd) { 418 // Parse the first declarator. 419 ParsingDeclarator D(*this, DS, static_cast<Declarator::TheContext>(Context)); 420 ParseDeclarator(D); 421 422 // Bail out if the first declarator didn't seem well-formed. 423 if (!D.hasName() && !D.mayOmitIdentifier()) { 424 // Skip until ; or }. 425 SkipUntil(tok::r_brace, true, true); 426 if (Tok.is(tok::semi)) 427 ConsumeToken(); 428 return DeclGroupPtrTy(); 429 } 430 431 // Check to see if we have a function *definition* which must have a body. 432 if (AllowFunctionDefinitions && D.isFunctionDeclarator() && 433 // Look at the next token to make sure that this isn't a function 434 // declaration. We have to check this because __attribute__ might be the 435 // start of a function definition in GCC-extended K&R C. 436 !isDeclarationAfterDeclarator()) { 437 438 if (isStartOfFunctionDefinition(D)) { 439 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 440 Diag(Tok, diag::err_function_declared_typedef); 441 442 // Recover by treating the 'typedef' as spurious. 443 DS.ClearStorageClassSpecs(); 444 } 445 446 Decl *TheDecl = ParseFunctionDefinition(D); 447 return Actions.ConvertDeclToDeclGroup(TheDecl); 448 } 449 450 if (isDeclarationSpecifier()) { 451 // If there is an invalid declaration specifier right after the function 452 // prototype, then we must be in a missing semicolon case where this isn't 453 // actually a body. Just fall through into the code that handles it as a 454 // prototype, and let the top-level code handle the erroneous declspec 455 // where it would otherwise expect a comma or semicolon. 456 } else { 457 Diag(Tok, diag::err_expected_fn_body); 458 SkipUntil(tok::semi); 459 return DeclGroupPtrTy(); 460 } 461 } 462 463 llvm::SmallVector<Decl *, 8> DeclsInGroup; 464 Decl *FirstDecl = ParseDeclarationAfterDeclarator(D); 465 D.complete(FirstDecl); 466 if (FirstDecl) 467 DeclsInGroup.push_back(FirstDecl); 468 469 // If we don't have a comma, it is either the end of the list (a ';') or an 470 // error, bail out. 471 while (Tok.is(tok::comma)) { 472 // Consume the comma. 473 ConsumeToken(); 474 475 // Parse the next declarator. 476 D.clear(); 477 478 // Accept attributes in an init-declarator. In the first declarator in a 479 // declaration, these would be part of the declspec. In subsequent 480 // declarators, they become part of the declarator itself, so that they 481 // don't apply to declarators after *this* one. Examples: 482 // short __attribute__((common)) var; -> declspec 483 // short var __attribute__((common)); -> declarator 484 // short x, __attribute__((common)) var; -> declarator 485 if (Tok.is(tok::kw___attribute)) { 486 SourceLocation Loc; 487 AttributeList *AttrList = ParseGNUAttributes(&Loc); 488 D.AddAttributes(AttrList, Loc); 489 } 490 491 ParseDeclarator(D); 492 493 Decl *ThisDecl = ParseDeclarationAfterDeclarator(D); 494 D.complete(ThisDecl); 495 if (ThisDecl) 496 DeclsInGroup.push_back(ThisDecl); 497 } 498 499 if (DeclEnd) 500 *DeclEnd = Tok.getLocation(); 501 502 if (Context != Declarator::ForContext && 503 ExpectAndConsume(tok::semi, 504 Context == Declarator::FileContext 505 ? diag::err_invalid_token_after_toplevel_declarator 506 : diag::err_expected_semi_declaration)) { 507 // Okay, there was no semicolon and one was expected. If we see a 508 // declaration specifier, just assume it was missing and continue parsing. 509 // Otherwise things are very confused and we skip to recover. 510 if (!isDeclarationSpecifier()) { 511 SkipUntil(tok::r_brace, true, true); 512 if (Tok.is(tok::semi)) 513 ConsumeToken(); 514 } 515 } 516 517 return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, 518 DeclsInGroup.data(), 519 DeclsInGroup.size()); 520} 521 522/// \brief Parse 'declaration' after parsing 'declaration-specifiers 523/// declarator'. This method parses the remainder of the declaration 524/// (including any attributes or initializer, among other things) and 525/// finalizes the declaration. 526/// 527/// init-declarator: [C99 6.7] 528/// declarator 529/// declarator '=' initializer 530/// [GNU] declarator simple-asm-expr[opt] attributes[opt] 531/// [GNU] declarator simple-asm-expr[opt] attributes[opt] '=' initializer 532/// [C++] declarator initializer[opt] 533/// 534/// [C++] initializer: 535/// [C++] '=' initializer-clause 536/// [C++] '(' expression-list ')' 537/// [C++0x] '=' 'default' [TODO] 538/// [C++0x] '=' 'delete' 539/// 540/// According to the standard grammar, =default and =delete are function 541/// definitions, but that definitely doesn't fit with the parser here. 542/// 543Decl *Parser::ParseDeclarationAfterDeclarator(Declarator &D, 544 const ParsedTemplateInfo &TemplateInfo) { 545 // If a simple-asm-expr is present, parse it. 546 if (Tok.is(tok::kw_asm)) { 547 SourceLocation Loc; 548 ExprResult AsmLabel(ParseSimpleAsm(&Loc)); 549 if (AsmLabel.isInvalid()) { 550 SkipUntil(tok::semi, true, true); 551 return 0; 552 } 553 554 D.setAsmLabel(AsmLabel.release()); 555 D.SetRangeEnd(Loc); 556 } 557 558 // If attributes are present, parse them. 559 if (Tok.is(tok::kw___attribute)) { 560 SourceLocation Loc; 561 AttributeList *AttrList = ParseGNUAttributes(&Loc); 562 D.AddAttributes(AttrList, Loc); 563 } 564 565 // Inform the current actions module that we just parsed this declarator. 566 Decl *ThisDecl = 0; 567 switch (TemplateInfo.Kind) { 568 case ParsedTemplateInfo::NonTemplate: 569 ThisDecl = Actions.ActOnDeclarator(getCurScope(), D); 570 break; 571 572 case ParsedTemplateInfo::Template: 573 case ParsedTemplateInfo::ExplicitSpecialization: 574 ThisDecl = Actions.ActOnTemplateDeclarator(getCurScope(), 575 MultiTemplateParamsArg(Actions, 576 TemplateInfo.TemplateParams->data(), 577 TemplateInfo.TemplateParams->size()), 578 D); 579 break; 580 581 case ParsedTemplateInfo::ExplicitInstantiation: { 582 DeclResult ThisRes 583 = Actions.ActOnExplicitInstantiation(getCurScope(), 584 TemplateInfo.ExternLoc, 585 TemplateInfo.TemplateLoc, 586 D); 587 if (ThisRes.isInvalid()) { 588 SkipUntil(tok::semi, true, true); 589 return 0; 590 } 591 592 ThisDecl = ThisRes.get(); 593 break; 594 } 595 } 596 597 // Parse declarator '=' initializer. 598 if (isTokenEqualOrMistypedEqualEqual( 599 diag::err_invalid_equalequal_after_declarator)) { 600 ConsumeToken(); 601 if (Tok.is(tok::kw_delete)) { 602 SourceLocation DelLoc = ConsumeToken(); 603 604 if (!getLang().CPlusPlus0x) 605 Diag(DelLoc, diag::warn_deleted_function_accepted_as_extension); 606 607 Actions.SetDeclDeleted(ThisDecl, DelLoc); 608 } else { 609 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 610 EnterScope(0); 611 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl); 612 } 613 614 if (Tok.is(tok::code_completion)) { 615 Actions.CodeCompleteInitializer(getCurScope(), ThisDecl); 616 ConsumeCodeCompletionToken(); 617 SkipUntil(tok::comma, true, true); 618 return ThisDecl; 619 } 620 621 ExprResult Init(ParseInitializer()); 622 623 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 624 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl); 625 ExitScope(); 626 } 627 628 if (Init.isInvalid()) { 629 SkipUntil(tok::comma, true, true); 630 Actions.ActOnInitializerError(ThisDecl); 631 } else 632 Actions.AddInitializerToDecl(ThisDecl, Init.take()); 633 } 634 } else if (Tok.is(tok::l_paren)) { 635 // Parse C++ direct initializer: '(' expression-list ')' 636 SourceLocation LParenLoc = ConsumeParen(); 637 ExprVector Exprs(Actions); 638 CommaLocsTy CommaLocs; 639 640 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 641 EnterScope(0); 642 Actions.ActOnCXXEnterDeclInitializer(getCurScope(), ThisDecl); 643 } 644 645 if (ParseExpressionList(Exprs, CommaLocs)) { 646 SkipUntil(tok::r_paren); 647 648 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 649 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl); 650 ExitScope(); 651 } 652 } else { 653 // Match the ')'. 654 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 655 656 assert(!Exprs.empty() && Exprs.size()-1 == CommaLocs.size() && 657 "Unexpected number of commas!"); 658 659 if (getLang().CPlusPlus && D.getCXXScopeSpec().isSet()) { 660 Actions.ActOnCXXExitDeclInitializer(getCurScope(), ThisDecl); 661 ExitScope(); 662 } 663 664 Actions.AddCXXDirectInitializerToDecl(ThisDecl, LParenLoc, 665 move_arg(Exprs), 666 RParenLoc); 667 } 668 } else { 669 bool TypeContainsUndeducedAuto = 670 D.getDeclSpec().getTypeSpecType() == DeclSpec::TST_auto; 671 Actions.ActOnUninitializedDecl(ThisDecl, TypeContainsUndeducedAuto); 672 } 673 674 return ThisDecl; 675} 676 677/// ParseSpecifierQualifierList 678/// specifier-qualifier-list: 679/// type-specifier specifier-qualifier-list[opt] 680/// type-qualifier specifier-qualifier-list[opt] 681/// [GNU] attributes specifier-qualifier-list[opt] 682/// 683void Parser::ParseSpecifierQualifierList(DeclSpec &DS) { 684 /// specifier-qualifier-list is a subset of declaration-specifiers. Just 685 /// parse declaration-specifiers and complain about extra stuff. 686 ParseDeclarationSpecifiers(DS); 687 688 // Validate declspec for type-name. 689 unsigned Specs = DS.getParsedSpecifiers(); 690 if (Specs == DeclSpec::PQ_None && !DS.getNumProtocolQualifiers() && 691 !DS.getAttributes()) 692 Diag(Tok, diag::err_typename_requires_specqual); 693 694 // Issue diagnostic and remove storage class if present. 695 if (Specs & DeclSpec::PQ_StorageClassSpecifier) { 696 if (DS.getStorageClassSpecLoc().isValid()) 697 Diag(DS.getStorageClassSpecLoc(),diag::err_typename_invalid_storageclass); 698 else 699 Diag(DS.getThreadSpecLoc(), diag::err_typename_invalid_storageclass); 700 DS.ClearStorageClassSpecs(); 701 } 702 703 // Issue diagnostic and remove function specfier if present. 704 if (Specs & DeclSpec::PQ_FunctionSpecifier) { 705 if (DS.isInlineSpecified()) 706 Diag(DS.getInlineSpecLoc(), diag::err_typename_invalid_functionspec); 707 if (DS.isVirtualSpecified()) 708 Diag(DS.getVirtualSpecLoc(), diag::err_typename_invalid_functionspec); 709 if (DS.isExplicitSpecified()) 710 Diag(DS.getExplicitSpecLoc(), diag::err_typename_invalid_functionspec); 711 DS.ClearFunctionSpecs(); 712 } 713} 714 715/// isValidAfterIdentifierInDeclaratorAfterDeclSpec - Return true if the 716/// specified token is valid after the identifier in a declarator which 717/// immediately follows the declspec. For example, these things are valid: 718/// 719/// int x [ 4]; // direct-declarator 720/// int x ( int y); // direct-declarator 721/// int(int x ) // direct-declarator 722/// int x ; // simple-declaration 723/// int x = 17; // init-declarator-list 724/// int x , y; // init-declarator-list 725/// int x __asm__ ("foo"); // init-declarator-list 726/// int x : 4; // struct-declarator 727/// int x { 5}; // C++'0x unified initializers 728/// 729/// This is not, because 'x' does not immediately follow the declspec (though 730/// ')' happens to be valid anyway). 731/// int (x) 732/// 733static bool isValidAfterIdentifierInDeclarator(const Token &T) { 734 return T.is(tok::l_square) || T.is(tok::l_paren) || T.is(tok::r_paren) || 735 T.is(tok::semi) || T.is(tok::comma) || T.is(tok::equal) || 736 T.is(tok::kw_asm) || T.is(tok::l_brace) || T.is(tok::colon); 737} 738 739 740/// ParseImplicitInt - This method is called when we have an non-typename 741/// identifier in a declspec (which normally terminates the decl spec) when 742/// the declspec has no type specifier. In this case, the declspec is either 743/// malformed or is "implicit int" (in K&R and C89). 744/// 745/// This method handles diagnosing this prettily and returns false if the 746/// declspec is done being processed. If it recovers and thinks there may be 747/// other pieces of declspec after it, it returns true. 748/// 749bool Parser::ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS, 750 const ParsedTemplateInfo &TemplateInfo, 751 AccessSpecifier AS) { 752 assert(Tok.is(tok::identifier) && "should have identifier"); 753 754 SourceLocation Loc = Tok.getLocation(); 755 // If we see an identifier that is not a type name, we normally would 756 // parse it as the identifer being declared. However, when a typename 757 // is typo'd or the definition is not included, this will incorrectly 758 // parse the typename as the identifier name and fall over misparsing 759 // later parts of the diagnostic. 760 // 761 // As such, we try to do some look-ahead in cases where this would 762 // otherwise be an "implicit-int" case to see if this is invalid. For 763 // example: "static foo_t x = 4;" In this case, if we parsed foo_t as 764 // an identifier with implicit int, we'd get a parse error because the 765 // next token is obviously invalid for a type. Parse these as a case 766 // with an invalid type specifier. 767 assert(!DS.hasTypeSpecifier() && "Type specifier checked above"); 768 769 // Since we know that this either implicit int (which is rare) or an 770 // error, we'd do lookahead to try to do better recovery. 771 if (isValidAfterIdentifierInDeclarator(NextToken())) { 772 // If this token is valid for implicit int, e.g. "static x = 4", then 773 // we just avoid eating the identifier, so it will be parsed as the 774 // identifier in the declarator. 775 return false; 776 } 777 778 // Otherwise, if we don't consume this token, we are going to emit an 779 // error anyway. Try to recover from various common problems. Check 780 // to see if this was a reference to a tag name without a tag specified. 781 // This is a common problem in C (saying 'foo' instead of 'struct foo'). 782 // 783 // C++ doesn't need this, and isTagName doesn't take SS. 784 if (SS == 0) { 785 const char *TagName = 0; 786 tok::TokenKind TagKind = tok::unknown; 787 788 switch (Actions.isTagName(*Tok.getIdentifierInfo(), getCurScope())) { 789 default: break; 790 case DeclSpec::TST_enum: TagName="enum" ;TagKind=tok::kw_enum ;break; 791 case DeclSpec::TST_union: TagName="union" ;TagKind=tok::kw_union ;break; 792 case DeclSpec::TST_struct:TagName="struct";TagKind=tok::kw_struct;break; 793 case DeclSpec::TST_class: TagName="class" ;TagKind=tok::kw_class ;break; 794 } 795 796 if (TagName) { 797 Diag(Loc, diag::err_use_of_tag_name_without_tag) 798 << Tok.getIdentifierInfo() << TagName << getLang().CPlusPlus 799 << FixItHint::CreateInsertion(Tok.getLocation(),TagName); 800 801 // Parse this as a tag as if the missing tag were present. 802 if (TagKind == tok::kw_enum) 803 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS); 804 else 805 ParseClassSpecifier(TagKind, Loc, DS, TemplateInfo, AS); 806 return true; 807 } 808 } 809 810 // This is almost certainly an invalid type name. Let the action emit a 811 // diagnostic and attempt to recover. 812 ParsedType T; 813 if (Actions.DiagnoseUnknownTypeName(*Tok.getIdentifierInfo(), Loc, 814 getCurScope(), SS, T)) { 815 // The action emitted a diagnostic, so we don't have to. 816 if (T) { 817 // The action has suggested that the type T could be used. Set that as 818 // the type in the declaration specifiers, consume the would-be type 819 // name token, and we're done. 820 const char *PrevSpec; 821 unsigned DiagID; 822 DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, DiagID, T); 823 DS.SetRangeEnd(Tok.getLocation()); 824 ConsumeToken(); 825 826 // There may be other declaration specifiers after this. 827 return true; 828 } 829 830 // Fall through; the action had no suggestion for us. 831 } else { 832 // The action did not emit a diagnostic, so emit one now. 833 SourceRange R; 834 if (SS) R = SS->getRange(); 835 Diag(Loc, diag::err_unknown_typename) << Tok.getIdentifierInfo() << R; 836 } 837 838 // Mark this as an error. 839 const char *PrevSpec; 840 unsigned DiagID; 841 DS.SetTypeSpecType(DeclSpec::TST_error, Loc, PrevSpec, DiagID); 842 DS.SetRangeEnd(Tok.getLocation()); 843 ConsumeToken(); 844 845 // TODO: Could inject an invalid typedef decl in an enclosing scope to 846 // avoid rippling error messages on subsequent uses of the same type, 847 // could be useful if #include was forgotten. 848 return false; 849} 850 851/// \brief Determine the declaration specifier context from the declarator 852/// context. 853/// 854/// \param Context the declarator context, which is one of the 855/// Declarator::TheContext enumerator values. 856Parser::DeclSpecContext 857Parser::getDeclSpecContextFromDeclaratorContext(unsigned Context) { 858 if (Context == Declarator::MemberContext) 859 return DSC_class; 860 if (Context == Declarator::FileContext) 861 return DSC_top_level; 862 return DSC_normal; 863} 864 865/// ParseDeclarationSpecifiers 866/// declaration-specifiers: [C99 6.7] 867/// storage-class-specifier declaration-specifiers[opt] 868/// type-specifier declaration-specifiers[opt] 869/// [C99] function-specifier declaration-specifiers[opt] 870/// [GNU] attributes declaration-specifiers[opt] 871/// 872/// storage-class-specifier: [C99 6.7.1] 873/// 'typedef' 874/// 'extern' 875/// 'static' 876/// 'auto' 877/// 'register' 878/// [C++] 'mutable' 879/// [GNU] '__thread' 880/// function-specifier: [C99 6.7.4] 881/// [C99] 'inline' 882/// [C++] 'virtual' 883/// [C++] 'explicit' 884/// 'friend': [C++ dcl.friend] 885/// 'constexpr': [C++0x dcl.constexpr] 886 887/// 888void Parser::ParseDeclarationSpecifiers(DeclSpec &DS, 889 const ParsedTemplateInfo &TemplateInfo, 890 AccessSpecifier AS, 891 DeclSpecContext DSContext) { 892 DS.SetRangeStart(Tok.getLocation()); 893 DS.SetRangeEnd(Tok.getLocation()); 894 while (1) { 895 bool isInvalid = false; 896 const char *PrevSpec = 0; 897 unsigned DiagID = 0; 898 899 SourceLocation Loc = Tok.getLocation(); 900 901 switch (Tok.getKind()) { 902 default: 903 DoneWithDeclSpec: 904 // If this is not a declaration specifier token, we're done reading decl 905 // specifiers. First verify that DeclSpec's are consistent. 906 DS.Finish(Diags, PP); 907 return; 908 909 case tok::code_completion: { 910 Sema::ParserCompletionContext CCC = Sema::PCC_Namespace; 911 if (DS.hasTypeSpecifier()) { 912 bool AllowNonIdentifiers 913 = (getCurScope()->getFlags() & (Scope::ControlScope | 914 Scope::BlockScope | 915 Scope::TemplateParamScope | 916 Scope::FunctionPrototypeScope | 917 Scope::AtCatchScope)) == 0; 918 bool AllowNestedNameSpecifiers 919 = DSContext == DSC_top_level || 920 (DSContext == DSC_class && DS.isFriendSpecified()); 921 922 Actions.CodeCompleteDeclSpec(getCurScope(), DS, 923 AllowNonIdentifiers, 924 AllowNestedNameSpecifiers); 925 ConsumeCodeCompletionToken(); 926 return; 927 } 928 929 if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) 930 CCC = DSContext == DSC_class? Sema::PCC_MemberTemplate 931 : Sema::PCC_Template; 932 else if (DSContext == DSC_class) 933 CCC = Sema::PCC_Class; 934 else if (ObjCImpDecl) 935 CCC = Sema::PCC_ObjCImplementation; 936 937 Actions.CodeCompleteOrdinaryName(getCurScope(), CCC); 938 ConsumeCodeCompletionToken(); 939 return; 940 } 941 942 case tok::coloncolon: // ::foo::bar 943 // C++ scope specifier. Annotate and loop, or bail out on error. 944 if (TryAnnotateCXXScopeToken(true)) { 945 if (!DS.hasTypeSpecifier()) 946 DS.SetTypeSpecError(); 947 goto DoneWithDeclSpec; 948 } 949 if (Tok.is(tok::coloncolon)) // ::new or ::delete 950 goto DoneWithDeclSpec; 951 continue; 952 953 case tok::annot_cxxscope: { 954 if (DS.hasTypeSpecifier()) 955 goto DoneWithDeclSpec; 956 957 CXXScopeSpec SS; 958 SS.setScopeRep((NestedNameSpecifier*) Tok.getAnnotationValue()); 959 SS.setRange(Tok.getAnnotationRange()); 960 961 // We are looking for a qualified typename. 962 Token Next = NextToken(); 963 if (Next.is(tok::annot_template_id) && 964 static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()) 965 ->Kind == TNK_Type_template) { 966 // We have a qualified template-id, e.g., N::A<int> 967 968 // C++ [class.qual]p2: 969 // In a lookup in which the constructor is an acceptable lookup 970 // result and the nested-name-specifier nominates a class C: 971 // 972 // - if the name specified after the 973 // nested-name-specifier, when looked up in C, is the 974 // injected-class-name of C (Clause 9), or 975 // 976 // - if the name specified after the nested-name-specifier 977 // is the same as the identifier or the 978 // simple-template-id's template-name in the last 979 // component of the nested-name-specifier, 980 // 981 // the name is instead considered to name the constructor of 982 // class C. 983 // 984 // Thus, if the template-name is actually the constructor 985 // name, then the code is ill-formed; this interpretation is 986 // reinforced by the NAD status of core issue 635. 987 TemplateIdAnnotation *TemplateId 988 = static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()); 989 if ((DSContext == DSC_top_level || 990 (DSContext == DSC_class && DS.isFriendSpecified())) && 991 TemplateId->Name && 992 Actions.isCurrentClassName(*TemplateId->Name, getCurScope(), &SS)) { 993 if (isConstructorDeclarator()) { 994 // The user meant this to be an out-of-line constructor 995 // definition, but template arguments are not allowed 996 // there. Just allow this as a constructor; we'll 997 // complain about it later. 998 goto DoneWithDeclSpec; 999 } 1000 1001 // The user meant this to name a type, but it actually names 1002 // a constructor with some extraneous template 1003 // arguments. Complain, then parse it as a type as the user 1004 // intended. 1005 Diag(TemplateId->TemplateNameLoc, 1006 diag::err_out_of_line_template_id_names_constructor) 1007 << TemplateId->Name; 1008 } 1009 1010 DS.getTypeSpecScope() = SS; 1011 ConsumeToken(); // The C++ scope. 1012 assert(Tok.is(tok::annot_template_id) && 1013 "ParseOptionalCXXScopeSpecifier not working"); 1014 AnnotateTemplateIdTokenAsType(&SS); 1015 continue; 1016 } 1017 1018 if (Next.is(tok::annot_typename)) { 1019 DS.getTypeSpecScope() = SS; 1020 ConsumeToken(); // The C++ scope. 1021 if (Tok.getAnnotationValue()) { 1022 ParsedType T = getTypeAnnotation(Tok); 1023 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, 1024 PrevSpec, DiagID, T); 1025 } 1026 else 1027 DS.SetTypeSpecError(); 1028 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 1029 ConsumeToken(); // The typename 1030 } 1031 1032 if (Next.isNot(tok::identifier)) 1033 goto DoneWithDeclSpec; 1034 1035 // If we're in a context where the identifier could be a class name, 1036 // check whether this is a constructor declaration. 1037 if ((DSContext == DSC_top_level || 1038 (DSContext == DSC_class && DS.isFriendSpecified())) && 1039 Actions.isCurrentClassName(*Next.getIdentifierInfo(), getCurScope(), 1040 &SS)) { 1041 if (isConstructorDeclarator()) 1042 goto DoneWithDeclSpec; 1043 1044 // As noted in C++ [class.qual]p2 (cited above), when the name 1045 // of the class is qualified in a context where it could name 1046 // a constructor, its a constructor name. However, we've 1047 // looked at the declarator, and the user probably meant this 1048 // to be a type. Complain that it isn't supposed to be treated 1049 // as a type, then proceed to parse it as a type. 1050 Diag(Next.getLocation(), diag::err_out_of_line_type_names_constructor) 1051 << Next.getIdentifierInfo(); 1052 } 1053 1054 ParsedType TypeRep = Actions.getTypeName(*Next.getIdentifierInfo(), 1055 Next.getLocation(), 1056 getCurScope(), &SS); 1057 1058 // If the referenced identifier is not a type, then this declspec is 1059 // erroneous: We already checked about that it has no type specifier, and 1060 // C++ doesn't have implicit int. Diagnose it as a typo w.r.t. to the 1061 // typename. 1062 if (TypeRep == 0) { 1063 ConsumeToken(); // Eat the scope spec so the identifier is current. 1064 if (ParseImplicitInt(DS, &SS, TemplateInfo, AS)) continue; 1065 goto DoneWithDeclSpec; 1066 } 1067 1068 DS.getTypeSpecScope() = SS; 1069 ConsumeToken(); // The C++ scope. 1070 1071 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1072 DiagID, TypeRep); 1073 if (isInvalid) 1074 break; 1075 1076 DS.SetRangeEnd(Tok.getLocation()); 1077 ConsumeToken(); // The typename. 1078 1079 continue; 1080 } 1081 1082 case tok::annot_typename: { 1083 if (Tok.getAnnotationValue()) { 1084 ParsedType T = getTypeAnnotation(Tok); 1085 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1086 DiagID, T); 1087 } else 1088 DS.SetTypeSpecError(); 1089 1090 if (isInvalid) 1091 break; 1092 1093 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 1094 ConsumeToken(); // The typename 1095 1096 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1097 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1098 // Objective-C interface. 1099 if (Tok.is(tok::less) && getLang().ObjC1) 1100 ParseObjCProtocolQualifiers(DS); 1101 1102 continue; 1103 } 1104 1105 // typedef-name 1106 case tok::identifier: { 1107 // In C++, check to see if this is a scope specifier like foo::bar::, if 1108 // so handle it as such. This is important for ctor parsing. 1109 if (getLang().CPlusPlus) { 1110 if (TryAnnotateCXXScopeToken(true)) { 1111 if (!DS.hasTypeSpecifier()) 1112 DS.SetTypeSpecError(); 1113 goto DoneWithDeclSpec; 1114 } 1115 if (!Tok.is(tok::identifier)) 1116 continue; 1117 } 1118 1119 // This identifier can only be a typedef name if we haven't already seen 1120 // a type-specifier. Without this check we misparse: 1121 // typedef int X; struct Y { short X; }; as 'short int'. 1122 if (DS.hasTypeSpecifier()) 1123 goto DoneWithDeclSpec; 1124 1125 // Check for need to substitute AltiVec keyword tokens. 1126 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid)) 1127 break; 1128 1129 // It has to be available as a typedef too! 1130 ParsedType TypeRep = 1131 Actions.getTypeName(*Tok.getIdentifierInfo(), 1132 Tok.getLocation(), getCurScope()); 1133 1134 // If this is not a typedef name, don't parse it as part of the declspec, 1135 // it must be an implicit int or an error. 1136 if (!TypeRep) { 1137 if (ParseImplicitInt(DS, 0, TemplateInfo, AS)) continue; 1138 goto DoneWithDeclSpec; 1139 } 1140 1141 // If we're in a context where the identifier could be a class name, 1142 // check whether this is a constructor declaration. 1143 if (getLang().CPlusPlus && DSContext == DSC_class && 1144 Actions.isCurrentClassName(*Tok.getIdentifierInfo(), getCurScope()) && 1145 isConstructorDeclarator()) 1146 goto DoneWithDeclSpec; 1147 1148 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1149 DiagID, TypeRep); 1150 if (isInvalid) 1151 break; 1152 1153 DS.SetRangeEnd(Tok.getLocation()); 1154 ConsumeToken(); // The identifier 1155 1156 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1157 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1158 // Objective-C interface. 1159 if (Tok.is(tok::less) && getLang().ObjC1) 1160 ParseObjCProtocolQualifiers(DS); 1161 1162 // Need to support trailing type qualifiers (e.g. "id<p> const"). 1163 // If a type specifier follows, it will be diagnosed elsewhere. 1164 continue; 1165 } 1166 1167 // type-name 1168 case tok::annot_template_id: { 1169 TemplateIdAnnotation *TemplateId 1170 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 1171 if (TemplateId->Kind != TNK_Type_template) { 1172 // This template-id does not refer to a type name, so we're 1173 // done with the type-specifiers. 1174 goto DoneWithDeclSpec; 1175 } 1176 1177 // If we're in a context where the template-id could be a 1178 // constructor name or specialization, check whether this is a 1179 // constructor declaration. 1180 if (getLang().CPlusPlus && DSContext == DSC_class && 1181 Actions.isCurrentClassName(*TemplateId->Name, getCurScope()) && 1182 isConstructorDeclarator()) 1183 goto DoneWithDeclSpec; 1184 1185 // Turn the template-id annotation token into a type annotation 1186 // token, then try again to parse it as a type-specifier. 1187 AnnotateTemplateIdTokenAsType(); 1188 continue; 1189 } 1190 1191 // GNU attributes support. 1192 case tok::kw___attribute: 1193 DS.AddAttributes(ParseGNUAttributes()); 1194 continue; 1195 1196 // Microsoft declspec support. 1197 case tok::kw___declspec: 1198 DS.AddAttributes(ParseMicrosoftDeclSpec()); 1199 continue; 1200 1201 // Microsoft single token adornments. 1202 case tok::kw___forceinline: 1203 // FIXME: Add handling here! 1204 break; 1205 1206 case tok::kw___ptr64: 1207 case tok::kw___w64: 1208 case tok::kw___cdecl: 1209 case tok::kw___stdcall: 1210 case tok::kw___fastcall: 1211 case tok::kw___thiscall: 1212 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 1213 continue; 1214 1215 // Borland single token adornments. 1216 case tok::kw___pascal: 1217 DS.AddAttributes(ParseBorlandTypeAttributes()); 1218 continue; 1219 1220 // storage-class-specifier 1221 case tok::kw_typedef: 1222 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_typedef, Loc, PrevSpec, 1223 DiagID); 1224 break; 1225 case tok::kw_extern: 1226 if (DS.isThreadSpecified()) 1227 Diag(Tok, diag::ext_thread_before) << "extern"; 1228 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_extern, Loc, PrevSpec, 1229 DiagID); 1230 break; 1231 case tok::kw___private_extern__: 1232 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_private_extern, Loc, 1233 PrevSpec, DiagID); 1234 break; 1235 case tok::kw_static: 1236 if (DS.isThreadSpecified()) 1237 Diag(Tok, diag::ext_thread_before) << "static"; 1238 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_static, Loc, PrevSpec, 1239 DiagID); 1240 break; 1241 case tok::kw_auto: 1242 if (getLang().CPlusPlus0x) 1243 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, 1244 DiagID); 1245 else 1246 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_auto, Loc, PrevSpec, 1247 DiagID); 1248 break; 1249 case tok::kw_register: 1250 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_register, Loc, PrevSpec, 1251 DiagID); 1252 break; 1253 case tok::kw_mutable: 1254 isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_mutable, Loc, PrevSpec, 1255 DiagID); 1256 break; 1257 case tok::kw___thread: 1258 isInvalid = DS.SetStorageClassSpecThread(Loc, PrevSpec, DiagID); 1259 break; 1260 1261 // function-specifier 1262 case tok::kw_inline: 1263 isInvalid = DS.SetFunctionSpecInline(Loc, PrevSpec, DiagID); 1264 break; 1265 case tok::kw_virtual: 1266 isInvalid = DS.SetFunctionSpecVirtual(Loc, PrevSpec, DiagID); 1267 break; 1268 case tok::kw_explicit: 1269 isInvalid = DS.SetFunctionSpecExplicit(Loc, PrevSpec, DiagID); 1270 break; 1271 1272 // friend 1273 case tok::kw_friend: 1274 if (DSContext == DSC_class) 1275 isInvalid = DS.SetFriendSpec(Loc, PrevSpec, DiagID); 1276 else { 1277 PrevSpec = ""; // not actually used by the diagnostic 1278 DiagID = diag::err_friend_invalid_in_context; 1279 isInvalid = true; 1280 } 1281 break; 1282 1283 // constexpr 1284 case tok::kw_constexpr: 1285 isInvalid = DS.SetConstexprSpec(Loc, PrevSpec, DiagID); 1286 break; 1287 1288 // type-specifier 1289 case tok::kw_short: 1290 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, 1291 DiagID); 1292 break; 1293 case tok::kw_long: 1294 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long) 1295 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, 1296 DiagID); 1297 else 1298 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 1299 DiagID); 1300 break; 1301 case tok::kw_signed: 1302 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, 1303 DiagID); 1304 break; 1305 case tok::kw_unsigned: 1306 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, 1307 DiagID); 1308 break; 1309 case tok::kw__Complex: 1310 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec, 1311 DiagID); 1312 break; 1313 case tok::kw__Imaginary: 1314 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec, 1315 DiagID); 1316 break; 1317 case tok::kw_void: 1318 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, 1319 DiagID); 1320 break; 1321 case tok::kw_char: 1322 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, 1323 DiagID); 1324 break; 1325 case tok::kw_int: 1326 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, 1327 DiagID); 1328 break; 1329 case tok::kw_float: 1330 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, 1331 DiagID); 1332 break; 1333 case tok::kw_double: 1334 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, 1335 DiagID); 1336 break; 1337 case tok::kw_wchar_t: 1338 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, 1339 DiagID); 1340 break; 1341 case tok::kw_char16_t: 1342 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, 1343 DiagID); 1344 break; 1345 case tok::kw_char32_t: 1346 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, 1347 DiagID); 1348 break; 1349 case tok::kw_bool: 1350 case tok::kw__Bool: 1351 if (Tok.is(tok::kw_bool) && 1352 DS.getTypeSpecType() != DeclSpec::TST_unspecified && 1353 DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 1354 PrevSpec = ""; // Not used by the diagnostic. 1355 DiagID = diag::err_bool_redeclaration; 1356 isInvalid = true; 1357 } else { 1358 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, 1359 DiagID); 1360 } 1361 break; 1362 case tok::kw__Decimal32: 1363 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec, 1364 DiagID); 1365 break; 1366 case tok::kw__Decimal64: 1367 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec, 1368 DiagID); 1369 break; 1370 case tok::kw__Decimal128: 1371 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec, 1372 DiagID); 1373 break; 1374 case tok::kw___vector: 1375 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 1376 break; 1377 case tok::kw___pixel: 1378 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID); 1379 break; 1380 1381 // class-specifier: 1382 case tok::kw_class: 1383 case tok::kw_struct: 1384 case tok::kw_union: { 1385 tok::TokenKind Kind = Tok.getKind(); 1386 ConsumeToken(); 1387 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS); 1388 continue; 1389 } 1390 1391 // enum-specifier: 1392 case tok::kw_enum: 1393 ConsumeToken(); 1394 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS); 1395 continue; 1396 1397 // cv-qualifier: 1398 case tok::kw_const: 1399 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const, Loc, PrevSpec, DiagID, 1400 getLang()); 1401 break; 1402 case tok::kw_volatile: 1403 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID, 1404 getLang()); 1405 break; 1406 case tok::kw_restrict: 1407 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID, 1408 getLang()); 1409 break; 1410 1411 // C++ typename-specifier: 1412 case tok::kw_typename: 1413 if (TryAnnotateTypeOrScopeToken()) { 1414 DS.SetTypeSpecError(); 1415 goto DoneWithDeclSpec; 1416 } 1417 if (!Tok.is(tok::kw_typename)) 1418 continue; 1419 break; 1420 1421 // GNU typeof support. 1422 case tok::kw_typeof: 1423 ParseTypeofSpecifier(DS); 1424 continue; 1425 1426 case tok::kw_decltype: 1427 ParseDecltypeSpecifier(DS); 1428 continue; 1429 1430 case tok::less: 1431 // GCC ObjC supports types like "<SomeProtocol>" as a synonym for 1432 // "id<SomeProtocol>". This is hopelessly old fashioned and dangerous, 1433 // but we support it. 1434 if (DS.hasTypeSpecifier() || !getLang().ObjC1) 1435 goto DoneWithDeclSpec; 1436 1437 if (!ParseObjCProtocolQualifiers(DS)) 1438 Diag(Loc, diag::warn_objc_protocol_qualifier_missing_id) 1439 << FixItHint::CreateInsertion(Loc, "id") 1440 << SourceRange(Loc, DS.getSourceRange().getEnd()); 1441 1442 // Need to support trailing type qualifiers (e.g. "id<p> const"). 1443 // If a type specifier follows, it will be diagnosed elsewhere. 1444 continue; 1445 } 1446 // If the specifier wasn't legal, issue a diagnostic. 1447 if (isInvalid) { 1448 assert(PrevSpec && "Method did not return previous specifier!"); 1449 assert(DiagID); 1450 1451 if (DiagID == diag::ext_duplicate_declspec) 1452 Diag(Tok, DiagID) 1453 << PrevSpec << FixItHint::CreateRemoval(Tok.getLocation()); 1454 else 1455 Diag(Tok, DiagID) << PrevSpec; 1456 } 1457 DS.SetRangeEnd(Tok.getLocation()); 1458 ConsumeToken(); 1459 } 1460} 1461 1462/// ParseOptionalTypeSpecifier - Try to parse a single type-specifier. We 1463/// primarily follow the C++ grammar with additions for C99 and GNU, 1464/// which together subsume the C grammar. Note that the C++ 1465/// type-specifier also includes the C type-qualifier (for const, 1466/// volatile, and C99 restrict). Returns true if a type-specifier was 1467/// found (and parsed), false otherwise. 1468/// 1469/// type-specifier: [C++ 7.1.5] 1470/// simple-type-specifier 1471/// class-specifier 1472/// enum-specifier 1473/// elaborated-type-specifier [TODO] 1474/// cv-qualifier 1475/// 1476/// cv-qualifier: [C++ 7.1.5.1] 1477/// 'const' 1478/// 'volatile' 1479/// [C99] 'restrict' 1480/// 1481/// simple-type-specifier: [ C++ 7.1.5.2] 1482/// '::'[opt] nested-name-specifier[opt] type-name [TODO] 1483/// '::'[opt] nested-name-specifier 'template' template-id [TODO] 1484/// 'char' 1485/// 'wchar_t' 1486/// 'bool' 1487/// 'short' 1488/// 'int' 1489/// 'long' 1490/// 'signed' 1491/// 'unsigned' 1492/// 'float' 1493/// 'double' 1494/// 'void' 1495/// [C99] '_Bool' 1496/// [C99] '_Complex' 1497/// [C99] '_Imaginary' // Removed in TC2? 1498/// [GNU] '_Decimal32' 1499/// [GNU] '_Decimal64' 1500/// [GNU] '_Decimal128' 1501/// [GNU] typeof-specifier 1502/// [OBJC] class-name objc-protocol-refs[opt] [TODO] 1503/// [OBJC] typedef-name objc-protocol-refs[opt] [TODO] 1504/// [C++0x] 'decltype' ( expression ) 1505/// [AltiVec] '__vector' 1506bool Parser::ParseOptionalTypeSpecifier(DeclSpec &DS, bool& isInvalid, 1507 const char *&PrevSpec, 1508 unsigned &DiagID, 1509 const ParsedTemplateInfo &TemplateInfo, 1510 bool SuppressDeclarations) { 1511 SourceLocation Loc = Tok.getLocation(); 1512 1513 switch (Tok.getKind()) { 1514 case tok::identifier: // foo::bar 1515 // If we already have a type specifier, this identifier is not a type. 1516 if (DS.getTypeSpecType() != DeclSpec::TST_unspecified || 1517 DS.getTypeSpecWidth() != DeclSpec::TSW_unspecified || 1518 DS.getTypeSpecSign() != DeclSpec::TSS_unspecified) 1519 return false; 1520 // Check for need to substitute AltiVec keyword tokens. 1521 if (TryAltiVecToken(DS, Loc, PrevSpec, DiagID, isInvalid)) 1522 break; 1523 // Fall through. 1524 case tok::kw_typename: // typename foo::bar 1525 // Annotate typenames and C++ scope specifiers. If we get one, just 1526 // recurse to handle whatever we get. 1527 if (TryAnnotateTypeOrScopeToken()) 1528 return true; 1529 if (Tok.is(tok::identifier)) 1530 return false; 1531 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID, 1532 TemplateInfo, SuppressDeclarations); 1533 case tok::coloncolon: // ::foo::bar 1534 if (NextToken().is(tok::kw_new) || // ::new 1535 NextToken().is(tok::kw_delete)) // ::delete 1536 return false; 1537 1538 // Annotate typenames and C++ scope specifiers. If we get one, just 1539 // recurse to handle whatever we get. 1540 if (TryAnnotateTypeOrScopeToken()) 1541 return true; 1542 return ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec, DiagID, 1543 TemplateInfo, SuppressDeclarations); 1544 1545 // simple-type-specifier: 1546 case tok::annot_typename: { 1547 if (ParsedType T = getTypeAnnotation(Tok)) { 1548 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 1549 DiagID, T); 1550 } else 1551 DS.SetTypeSpecError(); 1552 DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 1553 ConsumeToken(); // The typename 1554 1555 // Objective-C supports syntax of the form 'id<proto1,proto2>' where 'id' 1556 // is a specific typedef and 'itf<proto1,proto2>' where 'itf' is an 1557 // Objective-C interface. If we don't have Objective-C or a '<', this is 1558 // just a normal reference to a typedef name. 1559 if (Tok.is(tok::less) && getLang().ObjC1) 1560 ParseObjCProtocolQualifiers(DS); 1561 1562 return true; 1563 } 1564 1565 case tok::kw_short: 1566 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec, DiagID); 1567 break; 1568 case tok::kw_long: 1569 if (DS.getTypeSpecWidth() != DeclSpec::TSW_long) 1570 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec, 1571 DiagID); 1572 else 1573 isInvalid = DS.SetTypeSpecWidth(DeclSpec::TSW_longlong, Loc, PrevSpec, 1574 DiagID); 1575 break; 1576 case tok::kw_signed: 1577 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec, DiagID); 1578 break; 1579 case tok::kw_unsigned: 1580 isInvalid = DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec, 1581 DiagID); 1582 break; 1583 case tok::kw__Complex: 1584 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_complex, Loc, PrevSpec, 1585 DiagID); 1586 break; 1587 case tok::kw__Imaginary: 1588 isInvalid = DS.SetTypeSpecComplex(DeclSpec::TSC_imaginary, Loc, PrevSpec, 1589 DiagID); 1590 break; 1591 case tok::kw_void: 1592 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec, DiagID); 1593 break; 1594 case tok::kw_char: 1595 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec, DiagID); 1596 break; 1597 case tok::kw_int: 1598 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec, DiagID); 1599 break; 1600 case tok::kw_float: 1601 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec, DiagID); 1602 break; 1603 case tok::kw_double: 1604 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec, DiagID); 1605 break; 1606 case tok::kw_wchar_t: 1607 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec, DiagID); 1608 break; 1609 case tok::kw_char16_t: 1610 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char16, Loc, PrevSpec, DiagID); 1611 break; 1612 case tok::kw_char32_t: 1613 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_char32, Loc, PrevSpec, DiagID); 1614 break; 1615 case tok::kw_bool: 1616 case tok::kw__Bool: 1617 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec, DiagID); 1618 break; 1619 case tok::kw__Decimal32: 1620 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal32, Loc, PrevSpec, 1621 DiagID); 1622 break; 1623 case tok::kw__Decimal64: 1624 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal64, Loc, PrevSpec, 1625 DiagID); 1626 break; 1627 case tok::kw__Decimal128: 1628 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_decimal128, Loc, PrevSpec, 1629 DiagID); 1630 break; 1631 case tok::kw___vector: 1632 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 1633 break; 1634 case tok::kw___pixel: 1635 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID); 1636 break; 1637 1638 // class-specifier: 1639 case tok::kw_class: 1640 case tok::kw_struct: 1641 case tok::kw_union: { 1642 tok::TokenKind Kind = Tok.getKind(); 1643 ConsumeToken(); 1644 ParseClassSpecifier(Kind, Loc, DS, TemplateInfo, AS_none, 1645 SuppressDeclarations); 1646 return true; 1647 } 1648 1649 // enum-specifier: 1650 case tok::kw_enum: 1651 ConsumeToken(); 1652 ParseEnumSpecifier(Loc, DS, TemplateInfo, AS_none); 1653 return true; 1654 1655 // cv-qualifier: 1656 case tok::kw_const: 1657 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, 1658 DiagID, getLang()); 1659 break; 1660 case tok::kw_volatile: 1661 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, 1662 DiagID, getLang()); 1663 break; 1664 case tok::kw_restrict: 1665 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, 1666 DiagID, getLang()); 1667 break; 1668 1669 // GNU typeof support. 1670 case tok::kw_typeof: 1671 ParseTypeofSpecifier(DS); 1672 return true; 1673 1674 // C++0x decltype support. 1675 case tok::kw_decltype: 1676 ParseDecltypeSpecifier(DS); 1677 return true; 1678 1679 // C++0x auto support. 1680 case tok::kw_auto: 1681 if (!getLang().CPlusPlus0x) 1682 return false; 1683 1684 isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec, DiagID); 1685 break; 1686 1687 case tok::kw___ptr64: 1688 case tok::kw___w64: 1689 case tok::kw___cdecl: 1690 case tok::kw___stdcall: 1691 case tok::kw___fastcall: 1692 case tok::kw___thiscall: 1693 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 1694 return true; 1695 1696 case tok::kw___pascal: 1697 DS.AddAttributes(ParseBorlandTypeAttributes()); 1698 return true; 1699 1700 default: 1701 // Not a type-specifier; do nothing. 1702 return false; 1703 } 1704 1705 // If the specifier combination wasn't legal, issue a diagnostic. 1706 if (isInvalid) { 1707 assert(PrevSpec && "Method did not return previous specifier!"); 1708 // Pick between error or extwarn. 1709 Diag(Tok, DiagID) << PrevSpec; 1710 } 1711 DS.SetRangeEnd(Tok.getLocation()); 1712 ConsumeToken(); // whatever we parsed above. 1713 return true; 1714} 1715 1716/// ParseStructDeclaration - Parse a struct declaration without the terminating 1717/// semicolon. 1718/// 1719/// struct-declaration: 1720/// specifier-qualifier-list struct-declarator-list 1721/// [GNU] __extension__ struct-declaration 1722/// [GNU] specifier-qualifier-list 1723/// struct-declarator-list: 1724/// struct-declarator 1725/// struct-declarator-list ',' struct-declarator 1726/// [GNU] struct-declarator-list ',' attributes[opt] struct-declarator 1727/// struct-declarator: 1728/// declarator 1729/// [GNU] declarator attributes[opt] 1730/// declarator[opt] ':' constant-expression 1731/// [GNU] declarator[opt] ':' constant-expression attributes[opt] 1732/// 1733void Parser:: 1734ParseStructDeclaration(DeclSpec &DS, FieldCallback &Fields) { 1735 if (Tok.is(tok::kw___extension__)) { 1736 // __extension__ silences extension warnings in the subexpression. 1737 ExtensionRAIIObject O(Diags); // Use RAII to do this. 1738 ConsumeToken(); 1739 return ParseStructDeclaration(DS, Fields); 1740 } 1741 1742 // Parse the common specifier-qualifiers-list piece. 1743 SourceLocation DSStart = Tok.getLocation(); 1744 ParseSpecifierQualifierList(DS); 1745 1746 // If there are no declarators, this is a free-standing declaration 1747 // specifier. Let the actions module cope with it. 1748 if (Tok.is(tok::semi)) { 1749 Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS_none, DS); 1750 return; 1751 } 1752 1753 // Read struct-declarators until we find the semicolon. 1754 bool FirstDeclarator = true; 1755 while (1) { 1756 ParsingDeclRAIIObject PD(*this); 1757 FieldDeclarator DeclaratorInfo(DS); 1758 1759 // Attributes are only allowed here on successive declarators. 1760 if (!FirstDeclarator && Tok.is(tok::kw___attribute)) { 1761 SourceLocation Loc; 1762 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1763 DeclaratorInfo.D.AddAttributes(AttrList, Loc); 1764 } 1765 1766 /// struct-declarator: declarator 1767 /// struct-declarator: declarator[opt] ':' constant-expression 1768 if (Tok.isNot(tok::colon)) { 1769 // Don't parse FOO:BAR as if it were a typo for FOO::BAR. 1770 ColonProtectionRAIIObject X(*this); 1771 ParseDeclarator(DeclaratorInfo.D); 1772 } 1773 1774 if (Tok.is(tok::colon)) { 1775 ConsumeToken(); 1776 ExprResult Res(ParseConstantExpression()); 1777 if (Res.isInvalid()) 1778 SkipUntil(tok::semi, true, true); 1779 else 1780 DeclaratorInfo.BitfieldSize = Res.release(); 1781 } 1782 1783 // If attributes exist after the declarator, parse them. 1784 if (Tok.is(tok::kw___attribute)) { 1785 SourceLocation Loc; 1786 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1787 DeclaratorInfo.D.AddAttributes(AttrList, Loc); 1788 } 1789 1790 // We're done with this declarator; invoke the callback. 1791 Decl *D = Fields.invoke(DeclaratorInfo); 1792 PD.complete(D); 1793 1794 // If we don't have a comma, it is either the end of the list (a ';') 1795 // or an error, bail out. 1796 if (Tok.isNot(tok::comma)) 1797 return; 1798 1799 // Consume the comma. 1800 ConsumeToken(); 1801 1802 FirstDeclarator = false; 1803 } 1804} 1805 1806/// ParseStructUnionBody 1807/// struct-contents: 1808/// struct-declaration-list 1809/// [EXT] empty 1810/// [GNU] "struct-declaration-list" without terminatoring ';' 1811/// struct-declaration-list: 1812/// struct-declaration 1813/// struct-declaration-list struct-declaration 1814/// [OBC] '@' 'defs' '(' class-name ')' 1815/// 1816void Parser::ParseStructUnionBody(SourceLocation RecordLoc, 1817 unsigned TagType, Decl *TagDecl) { 1818 PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc, 1819 "parsing struct/union body"); 1820 1821 SourceLocation LBraceLoc = ConsumeBrace(); 1822 1823 ParseScope StructScope(this, Scope::ClassScope|Scope::DeclScope); 1824 Actions.ActOnTagStartDefinition(getCurScope(), TagDecl); 1825 1826 // Empty structs are an extension in C (C99 6.7.2.1p7), but are allowed in 1827 // C++. 1828 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus) 1829 Diag(Tok, diag::ext_empty_struct_union) 1830 << (TagType == TST_union); 1831 1832 llvm::SmallVector<Decl *, 32> FieldDecls; 1833 1834 // While we still have something to read, read the declarations in the struct. 1835 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 1836 // Each iteration of this loop reads one struct-declaration. 1837 1838 // Check for extraneous top-level semicolon. 1839 if (Tok.is(tok::semi)) { 1840 Diag(Tok, diag::ext_extra_struct_semi) 1841 << DeclSpec::getSpecifierName((DeclSpec::TST)TagType) 1842 << FixItHint::CreateRemoval(Tok.getLocation()); 1843 ConsumeToken(); 1844 continue; 1845 } 1846 1847 // Parse all the comma separated declarators. 1848 DeclSpec DS; 1849 1850 if (!Tok.is(tok::at)) { 1851 struct CFieldCallback : FieldCallback { 1852 Parser &P; 1853 Decl *TagDecl; 1854 llvm::SmallVectorImpl<Decl *> &FieldDecls; 1855 1856 CFieldCallback(Parser &P, Decl *TagDecl, 1857 llvm::SmallVectorImpl<Decl *> &FieldDecls) : 1858 P(P), TagDecl(TagDecl), FieldDecls(FieldDecls) {} 1859 1860 virtual Decl *invoke(FieldDeclarator &FD) { 1861 // Install the declarator into the current TagDecl. 1862 Decl *Field = P.Actions.ActOnField(P.getCurScope(), TagDecl, 1863 FD.D.getDeclSpec().getSourceRange().getBegin(), 1864 FD.D, FD.BitfieldSize); 1865 FieldDecls.push_back(Field); 1866 return Field; 1867 } 1868 } Callback(*this, TagDecl, FieldDecls); 1869 1870 ParseStructDeclaration(DS, Callback); 1871 } else { // Handle @defs 1872 ConsumeToken(); 1873 if (!Tok.isObjCAtKeyword(tok::objc_defs)) { 1874 Diag(Tok, diag::err_unexpected_at); 1875 SkipUntil(tok::semi, true); 1876 continue; 1877 } 1878 ConsumeToken(); 1879 ExpectAndConsume(tok::l_paren, diag::err_expected_lparen); 1880 if (!Tok.is(tok::identifier)) { 1881 Diag(Tok, diag::err_expected_ident); 1882 SkipUntil(tok::semi, true); 1883 continue; 1884 } 1885 llvm::SmallVector<Decl *, 16> Fields; 1886 Actions.ActOnDefs(getCurScope(), TagDecl, Tok.getLocation(), 1887 Tok.getIdentifierInfo(), Fields); 1888 FieldDecls.insert(FieldDecls.end(), Fields.begin(), Fields.end()); 1889 ConsumeToken(); 1890 ExpectAndConsume(tok::r_paren, diag::err_expected_rparen); 1891 } 1892 1893 if (Tok.is(tok::semi)) { 1894 ConsumeToken(); 1895 } else if (Tok.is(tok::r_brace)) { 1896 ExpectAndConsume(tok::semi, diag::ext_expected_semi_decl_list); 1897 break; 1898 } else { 1899 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list); 1900 // Skip to end of block or statement to avoid ext-warning on extra ';'. 1901 SkipUntil(tok::r_brace, true, true); 1902 // If we stopped at a ';', eat it. 1903 if (Tok.is(tok::semi)) ConsumeToken(); 1904 } 1905 } 1906 1907 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 1908 1909 AttributeList *AttrList = 0; 1910 // If attributes exist after struct contents, parse them. 1911 if (Tok.is(tok::kw___attribute)) 1912 AttrList = ParseGNUAttributes(); 1913 1914 Actions.ActOnFields(getCurScope(), 1915 RecordLoc, TagDecl, FieldDecls.data(), FieldDecls.size(), 1916 LBraceLoc, RBraceLoc, 1917 AttrList); 1918 StructScope.Exit(); 1919 Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl, RBraceLoc); 1920} 1921 1922 1923/// ParseEnumSpecifier 1924/// enum-specifier: [C99 6.7.2.2] 1925/// 'enum' identifier[opt] '{' enumerator-list '}' 1926///[C99/C++]'enum' identifier[opt] '{' enumerator-list ',' '}' 1927/// [GNU] 'enum' attributes[opt] identifier[opt] '{' enumerator-list ',' [opt] 1928/// '}' attributes[opt] 1929/// 'enum' identifier 1930/// [GNU] 'enum' attributes[opt] identifier 1931/// 1932/// [C++0x] enum-head '{' enumerator-list[opt] '}' 1933/// [C++0x] enum-head '{' enumerator-list ',' '}' 1934/// 1935/// enum-head: [C++0x] 1936/// enum-key attributes[opt] identifier[opt] enum-base[opt] 1937/// enum-key attributes[opt] nested-name-specifier identifier enum-base[opt] 1938/// 1939/// enum-key: [C++0x] 1940/// 'enum' 1941/// 'enum' 'class' 1942/// 'enum' 'struct' 1943/// 1944/// enum-base: [C++0x] 1945/// ':' type-specifier-seq 1946/// 1947/// [C++] elaborated-type-specifier: 1948/// [C++] 'enum' '::'[opt] nested-name-specifier[opt] identifier 1949/// 1950void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS, 1951 const ParsedTemplateInfo &TemplateInfo, 1952 AccessSpecifier AS) { 1953 // Parse the tag portion of this. 1954 if (Tok.is(tok::code_completion)) { 1955 // Code completion for an enum name. 1956 Actions.CodeCompleteTag(getCurScope(), DeclSpec::TST_enum); 1957 ConsumeCodeCompletionToken(); 1958 } 1959 1960 AttributeList *Attr = 0; 1961 // If attributes exist after tag, parse them. 1962 if (Tok.is(tok::kw___attribute)) 1963 Attr = ParseGNUAttributes(); 1964 1965 CXXScopeSpec &SS = DS.getTypeSpecScope(); 1966 if (getLang().CPlusPlus) { 1967 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), false)) 1968 return; 1969 1970 if (SS.isSet() && Tok.isNot(tok::identifier)) { 1971 Diag(Tok, diag::err_expected_ident); 1972 if (Tok.isNot(tok::l_brace)) { 1973 // Has no name and is not a definition. 1974 // Skip the rest of this declarator, up until the comma or semicolon. 1975 SkipUntil(tok::comma, true); 1976 return; 1977 } 1978 } 1979 } 1980 1981 bool IsScopedEnum = false; 1982 1983 if (getLang().CPlusPlus0x && (Tok.is(tok::kw_class) 1984 || Tok.is(tok::kw_struct))) { 1985 ConsumeToken(); 1986 IsScopedEnum = true; 1987 } 1988 1989 // Must have either 'enum name' or 'enum {...}'. 1990 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace)) { 1991 Diag(Tok, diag::err_expected_ident_lbrace); 1992 1993 // Skip the rest of this declarator, up until the comma or semicolon. 1994 SkipUntil(tok::comma, true); 1995 return; 1996 } 1997 1998 // If an identifier is present, consume and remember it. 1999 IdentifierInfo *Name = 0; 2000 SourceLocation NameLoc; 2001 if (Tok.is(tok::identifier)) { 2002 Name = Tok.getIdentifierInfo(); 2003 NameLoc = ConsumeToken(); 2004 } 2005 2006 if (!Name && IsScopedEnum) { 2007 // C++0x 7.2p2: The optional identifier shall not be omitted in the 2008 // declaration of a scoped enumeration. 2009 Diag(Tok, diag::err_scoped_enum_missing_identifier); 2010 IsScopedEnum = false; 2011 } 2012 2013 TypeResult BaseType; 2014 2015 if (getLang().CPlusPlus0x && Tok.is(tok::colon)) { 2016 ConsumeToken(); 2017 SourceRange Range; 2018 BaseType = ParseTypeName(&Range); 2019 } 2020 2021 // There are three options here. If we have 'enum foo;', then this is a 2022 // forward declaration. If we have 'enum foo {...' then this is a 2023 // definition. Otherwise we have something like 'enum foo xyz', a reference. 2024 // 2025 // This is needed to handle stuff like this right (C99 6.7.2.3p11): 2026 // enum foo {..}; void bar() { enum foo; } <- new foo in bar. 2027 // enum foo {..}; void bar() { enum foo x; } <- use of old foo. 2028 // 2029 Sema::TagUseKind TUK; 2030 if (Tok.is(tok::l_brace)) 2031 TUK = Sema::TUK_Definition; 2032 else if (Tok.is(tok::semi)) 2033 TUK = Sema::TUK_Declaration; 2034 else 2035 TUK = Sema::TUK_Reference; 2036 2037 // enums cannot be templates, although they can be referenced from a 2038 // template. 2039 if (TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate && 2040 TUK != Sema::TUK_Reference) { 2041 Diag(Tok, diag::err_enum_template); 2042 2043 // Skip the rest of this declarator, up until the comma or semicolon. 2044 SkipUntil(tok::comma, true); 2045 return; 2046 } 2047 2048 bool Owned = false; 2049 bool IsDependent = false; 2050 SourceLocation TSTLoc = NameLoc.isValid()? NameLoc : StartLoc; 2051 const char *PrevSpec = 0; 2052 unsigned DiagID; 2053 Decl *TagDecl = Actions.ActOnTag(getCurScope(), DeclSpec::TST_enum, TUK, 2054 StartLoc, SS, Name, NameLoc, Attr, 2055 AS, 2056 MultiTemplateParamsArg(Actions), 2057 Owned, IsDependent, IsScopedEnum, 2058 BaseType); 2059 2060 if (IsDependent) { 2061 // This enum has a dependent nested-name-specifier. Handle it as a 2062 // dependent tag. 2063 if (!Name) { 2064 DS.SetTypeSpecError(); 2065 Diag(Tok, diag::err_expected_type_name_after_typename); 2066 return; 2067 } 2068 2069 TypeResult Type = Actions.ActOnDependentTag(getCurScope(), DeclSpec::TST_enum, 2070 TUK, SS, Name, StartLoc, 2071 NameLoc); 2072 if (Type.isInvalid()) { 2073 DS.SetTypeSpecError(); 2074 return; 2075 } 2076 2077 if (DS.SetTypeSpecType(DeclSpec::TST_typename, TSTLoc, PrevSpec, DiagID, 2078 Type.get())) 2079 Diag(StartLoc, DiagID) << PrevSpec; 2080 2081 return; 2082 } 2083 2084 if (!TagDecl) { 2085 // The action failed to produce an enumeration tag. If this is a 2086 // definition, consume the entire definition. 2087 if (Tok.is(tok::l_brace)) { 2088 ConsumeBrace(); 2089 SkipUntil(tok::r_brace); 2090 } 2091 2092 DS.SetTypeSpecError(); 2093 return; 2094 } 2095 2096 if (Tok.is(tok::l_brace)) 2097 ParseEnumBody(StartLoc, TagDecl); 2098 2099 // FIXME: The DeclSpec should keep the locations of both the keyword 2100 // and the name (if there is one). 2101 if (DS.SetTypeSpecType(DeclSpec::TST_enum, TSTLoc, PrevSpec, DiagID, 2102 TagDecl, Owned)) 2103 Diag(StartLoc, DiagID) << PrevSpec; 2104} 2105 2106/// ParseEnumBody - Parse a {} enclosed enumerator-list. 2107/// enumerator-list: 2108/// enumerator 2109/// enumerator-list ',' enumerator 2110/// enumerator: 2111/// enumeration-constant 2112/// enumeration-constant '=' constant-expression 2113/// enumeration-constant: 2114/// identifier 2115/// 2116void Parser::ParseEnumBody(SourceLocation StartLoc, Decl *EnumDecl) { 2117 // Enter the scope of the enum body and start the definition. 2118 ParseScope EnumScope(this, Scope::DeclScope); 2119 Actions.ActOnTagStartDefinition(getCurScope(), EnumDecl); 2120 2121 SourceLocation LBraceLoc = ConsumeBrace(); 2122 2123 // C does not allow an empty enumerator-list, C++ does [dcl.enum]. 2124 if (Tok.is(tok::r_brace) && !getLang().CPlusPlus) 2125 Diag(Tok, diag::error_empty_enum); 2126 2127 llvm::SmallVector<Decl *, 32> EnumConstantDecls; 2128 2129 Decl *LastEnumConstDecl = 0; 2130 2131 // Parse the enumerator-list. 2132 while (Tok.is(tok::identifier)) { 2133 IdentifierInfo *Ident = Tok.getIdentifierInfo(); 2134 SourceLocation IdentLoc = ConsumeToken(); 2135 2136 // If attributes exist after the enumerator, parse them. 2137 AttributeList *Attr = 0; 2138 if (Tok.is(tok::kw___attribute)) 2139 Attr = ParseGNUAttributes(); 2140 2141 SourceLocation EqualLoc; 2142 ExprResult AssignedVal; 2143 if (Tok.is(tok::equal)) { 2144 EqualLoc = ConsumeToken(); 2145 AssignedVal = ParseConstantExpression(); 2146 if (AssignedVal.isInvalid()) 2147 SkipUntil(tok::comma, tok::r_brace, true, true); 2148 } 2149 2150 // Install the enumerator constant into EnumDecl. 2151 Decl *EnumConstDecl = Actions.ActOnEnumConstant(getCurScope(), EnumDecl, 2152 LastEnumConstDecl, 2153 IdentLoc, Ident, 2154 Attr, EqualLoc, 2155 AssignedVal.release()); 2156 EnumConstantDecls.push_back(EnumConstDecl); 2157 LastEnumConstDecl = EnumConstDecl; 2158 2159 if (Tok.is(tok::identifier)) { 2160 // We're missing a comma between enumerators. 2161 SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation); 2162 Diag(Loc, diag::err_enumerator_list_missing_comma) 2163 << FixItHint::CreateInsertion(Loc, ", "); 2164 continue; 2165 } 2166 2167 if (Tok.isNot(tok::comma)) 2168 break; 2169 SourceLocation CommaLoc = ConsumeToken(); 2170 2171 if (Tok.isNot(tok::identifier) && 2172 !(getLang().C99 || getLang().CPlusPlus0x)) 2173 Diag(CommaLoc, diag::ext_enumerator_list_comma) 2174 << getLang().CPlusPlus 2175 << FixItHint::CreateRemoval(CommaLoc); 2176 } 2177 2178 // Eat the }. 2179 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 2180 2181 AttributeList *Attr = 0; 2182 // If attributes exist after the identifier list, parse them. 2183 if (Tok.is(tok::kw___attribute)) 2184 Attr = ParseGNUAttributes(); // FIXME: where do they do? 2185 2186 Actions.ActOnEnumBody(StartLoc, LBraceLoc, RBraceLoc, EnumDecl, 2187 EnumConstantDecls.data(), EnumConstantDecls.size(), 2188 getCurScope(), Attr); 2189 2190 EnumScope.Exit(); 2191 Actions.ActOnTagFinishDefinition(getCurScope(), EnumDecl, RBraceLoc); 2192} 2193 2194/// isTypeSpecifierQualifier - Return true if the current token could be the 2195/// start of a type-qualifier-list. 2196bool Parser::isTypeQualifier() const { 2197 switch (Tok.getKind()) { 2198 default: return false; 2199 // type-qualifier 2200 case tok::kw_const: 2201 case tok::kw_volatile: 2202 case tok::kw_restrict: 2203 return true; 2204 } 2205} 2206 2207/// isKnownToBeTypeSpecifier - Return true if we know that the specified token 2208/// is definitely a type-specifier. Return false if it isn't part of a type 2209/// specifier or if we're not sure. 2210bool Parser::isKnownToBeTypeSpecifier(const Token &Tok) const { 2211 switch (Tok.getKind()) { 2212 default: return false; 2213 // type-specifiers 2214 case tok::kw_short: 2215 case tok::kw_long: 2216 case tok::kw_signed: 2217 case tok::kw_unsigned: 2218 case tok::kw__Complex: 2219 case tok::kw__Imaginary: 2220 case tok::kw_void: 2221 case tok::kw_char: 2222 case tok::kw_wchar_t: 2223 case tok::kw_char16_t: 2224 case tok::kw_char32_t: 2225 case tok::kw_int: 2226 case tok::kw_float: 2227 case tok::kw_double: 2228 case tok::kw_bool: 2229 case tok::kw__Bool: 2230 case tok::kw__Decimal32: 2231 case tok::kw__Decimal64: 2232 case tok::kw__Decimal128: 2233 case tok::kw___vector: 2234 2235 // struct-or-union-specifier (C99) or class-specifier (C++) 2236 case tok::kw_class: 2237 case tok::kw_struct: 2238 case tok::kw_union: 2239 // enum-specifier 2240 case tok::kw_enum: 2241 2242 // typedef-name 2243 case tok::annot_typename: 2244 return true; 2245 } 2246} 2247 2248/// isTypeSpecifierQualifier - Return true if the current token could be the 2249/// start of a specifier-qualifier-list. 2250bool Parser::isTypeSpecifierQualifier() { 2251 switch (Tok.getKind()) { 2252 default: return false; 2253 2254 case tok::identifier: // foo::bar 2255 if (TryAltiVecVectorToken()) 2256 return true; 2257 // Fall through. 2258 case tok::kw_typename: // typename T::type 2259 // Annotate typenames and C++ scope specifiers. If we get one, just 2260 // recurse to handle whatever we get. 2261 if (TryAnnotateTypeOrScopeToken()) 2262 return true; 2263 if (Tok.is(tok::identifier)) 2264 return false; 2265 return isTypeSpecifierQualifier(); 2266 2267 case tok::coloncolon: // ::foo::bar 2268 if (NextToken().is(tok::kw_new) || // ::new 2269 NextToken().is(tok::kw_delete)) // ::delete 2270 return false; 2271 2272 if (TryAnnotateTypeOrScopeToken()) 2273 return true; 2274 return isTypeSpecifierQualifier(); 2275 2276 // GNU attributes support. 2277 case tok::kw___attribute: 2278 // GNU typeof support. 2279 case tok::kw_typeof: 2280 2281 // type-specifiers 2282 case tok::kw_short: 2283 case tok::kw_long: 2284 case tok::kw_signed: 2285 case tok::kw_unsigned: 2286 case tok::kw__Complex: 2287 case tok::kw__Imaginary: 2288 case tok::kw_void: 2289 case tok::kw_char: 2290 case tok::kw_wchar_t: 2291 case tok::kw_char16_t: 2292 case tok::kw_char32_t: 2293 case tok::kw_int: 2294 case tok::kw_float: 2295 case tok::kw_double: 2296 case tok::kw_bool: 2297 case tok::kw__Bool: 2298 case tok::kw__Decimal32: 2299 case tok::kw__Decimal64: 2300 case tok::kw__Decimal128: 2301 case tok::kw___vector: 2302 2303 // struct-or-union-specifier (C99) or class-specifier (C++) 2304 case tok::kw_class: 2305 case tok::kw_struct: 2306 case tok::kw_union: 2307 // enum-specifier 2308 case tok::kw_enum: 2309 2310 // type-qualifier 2311 case tok::kw_const: 2312 case tok::kw_volatile: 2313 case tok::kw_restrict: 2314 2315 // typedef-name 2316 case tok::annot_typename: 2317 return true; 2318 2319 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'. 2320 case tok::less: 2321 return getLang().ObjC1; 2322 2323 case tok::kw___cdecl: 2324 case tok::kw___stdcall: 2325 case tok::kw___fastcall: 2326 case tok::kw___thiscall: 2327 case tok::kw___w64: 2328 case tok::kw___ptr64: 2329 case tok::kw___pascal: 2330 return true; 2331 } 2332} 2333 2334/// isDeclarationSpecifier() - Return true if the current token is part of a 2335/// declaration specifier. 2336/// 2337/// \param DisambiguatingWithExpression True to indicate that the purpose of 2338/// this check is to disambiguate between an expression and a declaration. 2339bool Parser::isDeclarationSpecifier(bool DisambiguatingWithExpression) { 2340 switch (Tok.getKind()) { 2341 default: return false; 2342 2343 case tok::identifier: // foo::bar 2344 // Unfortunate hack to support "Class.factoryMethod" notation. 2345 if (getLang().ObjC1 && NextToken().is(tok::period)) 2346 return false; 2347 if (TryAltiVecVectorToken()) 2348 return true; 2349 // Fall through. 2350 case tok::kw_typename: // typename T::type 2351 // Annotate typenames and C++ scope specifiers. If we get one, just 2352 // recurse to handle whatever we get. 2353 if (TryAnnotateTypeOrScopeToken()) 2354 return true; 2355 if (Tok.is(tok::identifier)) 2356 return false; 2357 2358 // If we're in Objective-C and we have an Objective-C class type followed 2359 // by an identifier and then either ':' or ']', in a place where an 2360 // expression is permitted, then this is probably a class message send 2361 // missing the initial '['. In this case, we won't consider this to be 2362 // the start of a declaration. 2363 if (DisambiguatingWithExpression && 2364 isStartOfObjCClassMessageMissingOpenBracket()) 2365 return false; 2366 2367 return isDeclarationSpecifier(); 2368 2369 case tok::coloncolon: // ::foo::bar 2370 if (NextToken().is(tok::kw_new) || // ::new 2371 NextToken().is(tok::kw_delete)) // ::delete 2372 return false; 2373 2374 // Annotate typenames and C++ scope specifiers. If we get one, just 2375 // recurse to handle whatever we get. 2376 if (TryAnnotateTypeOrScopeToken()) 2377 return true; 2378 return isDeclarationSpecifier(); 2379 2380 // storage-class-specifier 2381 case tok::kw_typedef: 2382 case tok::kw_extern: 2383 case tok::kw___private_extern__: 2384 case tok::kw_static: 2385 case tok::kw_auto: 2386 case tok::kw_register: 2387 case tok::kw___thread: 2388 2389 // type-specifiers 2390 case tok::kw_short: 2391 case tok::kw_long: 2392 case tok::kw_signed: 2393 case tok::kw_unsigned: 2394 case tok::kw__Complex: 2395 case tok::kw__Imaginary: 2396 case tok::kw_void: 2397 case tok::kw_char: 2398 case tok::kw_wchar_t: 2399 case tok::kw_char16_t: 2400 case tok::kw_char32_t: 2401 2402 case tok::kw_int: 2403 case tok::kw_float: 2404 case tok::kw_double: 2405 case tok::kw_bool: 2406 case tok::kw__Bool: 2407 case tok::kw__Decimal32: 2408 case tok::kw__Decimal64: 2409 case tok::kw__Decimal128: 2410 case tok::kw___vector: 2411 2412 // struct-or-union-specifier (C99) or class-specifier (C++) 2413 case tok::kw_class: 2414 case tok::kw_struct: 2415 case tok::kw_union: 2416 // enum-specifier 2417 case tok::kw_enum: 2418 2419 // type-qualifier 2420 case tok::kw_const: 2421 case tok::kw_volatile: 2422 case tok::kw_restrict: 2423 2424 // function-specifier 2425 case tok::kw_inline: 2426 case tok::kw_virtual: 2427 case tok::kw_explicit: 2428 2429 // typedef-name 2430 case tok::annot_typename: 2431 2432 // GNU typeof support. 2433 case tok::kw_typeof: 2434 2435 // GNU attributes. 2436 case tok::kw___attribute: 2437 return true; 2438 2439 // GNU ObjC bizarre protocol extension: <proto1,proto2> with implicit 'id'. 2440 case tok::less: 2441 return getLang().ObjC1; 2442 2443 case tok::kw___declspec: 2444 case tok::kw___cdecl: 2445 case tok::kw___stdcall: 2446 case tok::kw___fastcall: 2447 case tok::kw___thiscall: 2448 case tok::kw___w64: 2449 case tok::kw___ptr64: 2450 case tok::kw___forceinline: 2451 case tok::kw___pascal: 2452 return true; 2453 } 2454} 2455 2456bool Parser::isConstructorDeclarator() { 2457 TentativeParsingAction TPA(*this); 2458 2459 // Parse the C++ scope specifier. 2460 CXXScopeSpec SS; 2461 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), true)) { 2462 TPA.Revert(); 2463 return false; 2464 } 2465 2466 // Parse the constructor name. 2467 if (Tok.is(tok::identifier) || Tok.is(tok::annot_template_id)) { 2468 // We already know that we have a constructor name; just consume 2469 // the token. 2470 ConsumeToken(); 2471 } else { 2472 TPA.Revert(); 2473 return false; 2474 } 2475 2476 // Current class name must be followed by a left parentheses. 2477 if (Tok.isNot(tok::l_paren)) { 2478 TPA.Revert(); 2479 return false; 2480 } 2481 ConsumeParen(); 2482 2483 // A right parentheses or ellipsis signals that we have a constructor. 2484 if (Tok.is(tok::r_paren) || Tok.is(tok::ellipsis)) { 2485 TPA.Revert(); 2486 return true; 2487 } 2488 2489 // If we need to, enter the specified scope. 2490 DeclaratorScopeObj DeclScopeObj(*this, SS); 2491 if (SS.isSet() && Actions.ShouldEnterDeclaratorScope(getCurScope(), SS)) 2492 DeclScopeObj.EnterDeclaratorScope(); 2493 2494 // Check whether the next token(s) are part of a declaration 2495 // specifier, in which case we have the start of a parameter and, 2496 // therefore, we know that this is a constructor. 2497 bool IsConstructor = isDeclarationSpecifier(); 2498 TPA.Revert(); 2499 return IsConstructor; 2500} 2501 2502/// ParseTypeQualifierListOpt 2503/// type-qualifier-list: [C99 6.7.5] 2504/// type-qualifier 2505/// [vendor] attributes 2506/// [ only if VendorAttributesAllowed=true ] 2507/// type-qualifier-list type-qualifier 2508/// [vendor] type-qualifier-list attributes 2509/// [ only if VendorAttributesAllowed=true ] 2510/// [C++0x] attribute-specifier[opt] is allowed before cv-qualifier-seq 2511/// [ only if CXX0XAttributesAllowed=true ] 2512/// Note: vendor can be GNU, MS, etc. 2513/// 2514void Parser::ParseTypeQualifierListOpt(DeclSpec &DS, 2515 bool VendorAttributesAllowed, 2516 bool CXX0XAttributesAllowed) { 2517 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 2518 SourceLocation Loc = Tok.getLocation(); 2519 CXX0XAttributeList Attr = ParseCXX0XAttributes(); 2520 if (CXX0XAttributesAllowed) 2521 DS.AddAttributes(Attr.AttrList); 2522 else 2523 Diag(Loc, diag::err_attributes_not_allowed); 2524 } 2525 2526 while (1) { 2527 bool isInvalid = false; 2528 const char *PrevSpec = 0; 2529 unsigned DiagID = 0; 2530 SourceLocation Loc = Tok.getLocation(); 2531 2532 switch (Tok.getKind()) { 2533 case tok::code_completion: 2534 Actions.CodeCompleteTypeQualifiers(DS); 2535 ConsumeCodeCompletionToken(); 2536 break; 2537 2538 case tok::kw_const: 2539 isInvalid = DS.SetTypeQual(DeclSpec::TQ_const , Loc, PrevSpec, DiagID, 2540 getLang()); 2541 break; 2542 case tok::kw_volatile: 2543 isInvalid = DS.SetTypeQual(DeclSpec::TQ_volatile, Loc, PrevSpec, DiagID, 2544 getLang()); 2545 break; 2546 case tok::kw_restrict: 2547 isInvalid = DS.SetTypeQual(DeclSpec::TQ_restrict, Loc, PrevSpec, DiagID, 2548 getLang()); 2549 break; 2550 case tok::kw___w64: 2551 case tok::kw___ptr64: 2552 case tok::kw___cdecl: 2553 case tok::kw___stdcall: 2554 case tok::kw___fastcall: 2555 case tok::kw___thiscall: 2556 if (VendorAttributesAllowed) { 2557 DS.AddAttributes(ParseMicrosoftTypeAttributes()); 2558 continue; 2559 } 2560 goto DoneWithTypeQuals; 2561 case tok::kw___pascal: 2562 if (VendorAttributesAllowed) { 2563 DS.AddAttributes(ParseBorlandTypeAttributes()); 2564 continue; 2565 } 2566 goto DoneWithTypeQuals; 2567 case tok::kw___attribute: 2568 if (VendorAttributesAllowed) { 2569 DS.AddAttributes(ParseGNUAttributes()); 2570 continue; // do *not* consume the next token! 2571 } 2572 // otherwise, FALL THROUGH! 2573 default: 2574 DoneWithTypeQuals: 2575 // If this is not a type-qualifier token, we're done reading type 2576 // qualifiers. First verify that DeclSpec's are consistent. 2577 DS.Finish(Diags, PP); 2578 return; 2579 } 2580 2581 // If the specifier combination wasn't legal, issue a diagnostic. 2582 if (isInvalid) { 2583 assert(PrevSpec && "Method did not return previous specifier!"); 2584 Diag(Tok, DiagID) << PrevSpec; 2585 } 2586 ConsumeToken(); 2587 } 2588} 2589 2590 2591/// ParseDeclarator - Parse and verify a newly-initialized declarator. 2592/// 2593void Parser::ParseDeclarator(Declarator &D) { 2594 /// This implements the 'declarator' production in the C grammar, then checks 2595 /// for well-formedness and issues diagnostics. 2596 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator); 2597} 2598 2599/// ParseDeclaratorInternal - Parse a C or C++ declarator. The direct-declarator 2600/// is parsed by the function passed to it. Pass null, and the direct-declarator 2601/// isn't parsed at all, making this function effectively parse the C++ 2602/// ptr-operator production. 2603/// 2604/// declarator: [C99 6.7.5] [C++ 8p4, dcl.decl] 2605/// [C] pointer[opt] direct-declarator 2606/// [C++] direct-declarator 2607/// [C++] ptr-operator declarator 2608/// 2609/// pointer: [C99 6.7.5] 2610/// '*' type-qualifier-list[opt] 2611/// '*' type-qualifier-list[opt] pointer 2612/// 2613/// ptr-operator: 2614/// '*' cv-qualifier-seq[opt] 2615/// '&' 2616/// [C++0x] '&&' 2617/// [GNU] '&' restrict[opt] attributes[opt] 2618/// [GNU?] '&&' restrict[opt] attributes[opt] 2619/// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt] 2620void Parser::ParseDeclaratorInternal(Declarator &D, 2621 DirectDeclParseFunction DirectDeclParser) { 2622 if (Diags.hasAllExtensionsSilenced()) 2623 D.setExtension(); 2624 2625 // C++ member pointers start with a '::' or a nested-name. 2626 // Member pointers get special handling, since there's no place for the 2627 // scope spec in the generic path below. 2628 if (getLang().CPlusPlus && 2629 (Tok.is(tok::coloncolon) || Tok.is(tok::identifier) || 2630 Tok.is(tok::annot_cxxscope))) { 2631 CXXScopeSpec SS; 2632 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), true); // ignore fail 2633 2634 if (SS.isNotEmpty()) { 2635 if (Tok.isNot(tok::star)) { 2636 // The scope spec really belongs to the direct-declarator. 2637 D.getCXXScopeSpec() = SS; 2638 if (DirectDeclParser) 2639 (this->*DirectDeclParser)(D); 2640 return; 2641 } 2642 2643 SourceLocation Loc = ConsumeToken(); 2644 D.SetRangeEnd(Loc); 2645 DeclSpec DS; 2646 ParseTypeQualifierListOpt(DS); 2647 D.ExtendWithDeclSpec(DS); 2648 2649 // Recurse to parse whatever is left. 2650 ParseDeclaratorInternal(D, DirectDeclParser); 2651 2652 // Sema will have to catch (syntactically invalid) pointers into global 2653 // scope. It has to catch pointers into namespace scope anyway. 2654 D.AddTypeInfo(DeclaratorChunk::getMemberPointer(SS,DS.getTypeQualifiers(), 2655 Loc, DS.TakeAttributes()), 2656 /* Don't replace range end. */SourceLocation()); 2657 return; 2658 } 2659 } 2660 2661 tok::TokenKind Kind = Tok.getKind(); 2662 // Not a pointer, C++ reference, or block. 2663 if (Kind != tok::star && Kind != tok::caret && 2664 (Kind != tok::amp || !getLang().CPlusPlus) && 2665 // We parse rvalue refs in C++03, because otherwise the errors are scary. 2666 (Kind != tok::ampamp || !getLang().CPlusPlus)) { 2667 if (DirectDeclParser) 2668 (this->*DirectDeclParser)(D); 2669 return; 2670 } 2671 2672 // Otherwise, '*' -> pointer, '^' -> block, '&' -> lvalue reference, 2673 // '&&' -> rvalue reference 2674 SourceLocation Loc = ConsumeToken(); // Eat the *, ^, & or &&. 2675 D.SetRangeEnd(Loc); 2676 2677 if (Kind == tok::star || Kind == tok::caret) { 2678 // Is a pointer. 2679 DeclSpec DS; 2680 2681 ParseTypeQualifierListOpt(DS); 2682 D.ExtendWithDeclSpec(DS); 2683 2684 // Recursively parse the declarator. 2685 ParseDeclaratorInternal(D, DirectDeclParser); 2686 if (Kind == tok::star) 2687 // Remember that we parsed a pointer type, and remember the type-quals. 2688 D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc, 2689 DS.TakeAttributes()), 2690 SourceLocation()); 2691 else 2692 // Remember that we parsed a Block type, and remember the type-quals. 2693 D.AddTypeInfo(DeclaratorChunk::getBlockPointer(DS.getTypeQualifiers(), 2694 Loc, DS.TakeAttributes()), 2695 SourceLocation()); 2696 } else { 2697 // Is a reference 2698 DeclSpec DS; 2699 2700 // Complain about rvalue references in C++03, but then go on and build 2701 // the declarator. 2702 if (Kind == tok::ampamp && !getLang().CPlusPlus0x) 2703 Diag(Loc, diag::err_rvalue_reference); 2704 2705 // C++ 8.3.2p1: cv-qualified references are ill-formed except when the 2706 // cv-qualifiers are introduced through the use of a typedef or of a 2707 // template type argument, in which case the cv-qualifiers are ignored. 2708 // 2709 // [GNU] Retricted references are allowed. 2710 // [GNU] Attributes on references are allowed. 2711 // [C++0x] Attributes on references are not allowed. 2712 ParseTypeQualifierListOpt(DS, true, false); 2713 D.ExtendWithDeclSpec(DS); 2714 2715 if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) { 2716 if (DS.getTypeQualifiers() & DeclSpec::TQ_const) 2717 Diag(DS.getConstSpecLoc(), 2718 diag::err_invalid_reference_qualifier_application) << "const"; 2719 if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) 2720 Diag(DS.getVolatileSpecLoc(), 2721 diag::err_invalid_reference_qualifier_application) << "volatile"; 2722 } 2723 2724 // Recursively parse the declarator. 2725 ParseDeclaratorInternal(D, DirectDeclParser); 2726 2727 if (D.getNumTypeObjects() > 0) { 2728 // C++ [dcl.ref]p4: There shall be no references to references. 2729 DeclaratorChunk& InnerChunk = D.getTypeObject(D.getNumTypeObjects() - 1); 2730 if (InnerChunk.Kind == DeclaratorChunk::Reference) { 2731 if (const IdentifierInfo *II = D.getIdentifier()) 2732 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference) 2733 << II; 2734 else 2735 Diag(InnerChunk.Loc, diag::err_illegal_decl_reference_to_reference) 2736 << "type name"; 2737 2738 // Once we've complained about the reference-to-reference, we 2739 // can go ahead and build the (technically ill-formed) 2740 // declarator: reference collapsing will take care of it. 2741 } 2742 } 2743 2744 // Remember that we parsed a reference type. It doesn't have type-quals. 2745 D.AddTypeInfo(DeclaratorChunk::getReference(DS.getTypeQualifiers(), Loc, 2746 DS.TakeAttributes(), 2747 Kind == tok::amp), 2748 SourceLocation()); 2749 } 2750} 2751 2752/// ParseDirectDeclarator 2753/// direct-declarator: [C99 6.7.5] 2754/// [C99] identifier 2755/// '(' declarator ')' 2756/// [GNU] '(' attributes declarator ')' 2757/// [C90] direct-declarator '[' constant-expression[opt] ']' 2758/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']' 2759/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']' 2760/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']' 2761/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']' 2762/// direct-declarator '(' parameter-type-list ')' 2763/// direct-declarator '(' identifier-list[opt] ')' 2764/// [GNU] direct-declarator '(' parameter-forward-declarations 2765/// parameter-type-list[opt] ')' 2766/// [C++] direct-declarator '(' parameter-declaration-clause ')' 2767/// cv-qualifier-seq[opt] exception-specification[opt] 2768/// [C++] declarator-id 2769/// 2770/// declarator-id: [C++ 8] 2771/// id-expression 2772/// '::'[opt] nested-name-specifier[opt] type-name 2773/// 2774/// id-expression: [C++ 5.1] 2775/// unqualified-id 2776/// qualified-id 2777/// 2778/// unqualified-id: [C++ 5.1] 2779/// identifier 2780/// operator-function-id 2781/// conversion-function-id 2782/// '~' class-name 2783/// template-id 2784/// 2785void Parser::ParseDirectDeclarator(Declarator &D) { 2786 DeclaratorScopeObj DeclScopeObj(*this, D.getCXXScopeSpec()); 2787 2788 if (getLang().CPlusPlus && D.mayHaveIdentifier()) { 2789 // ParseDeclaratorInternal might already have parsed the scope. 2790 if (D.getCXXScopeSpec().isEmpty()) { 2791 ParseOptionalCXXScopeSpecifier(D.getCXXScopeSpec(), ParsedType(), true); 2792 } 2793 2794 if (D.getCXXScopeSpec().isValid()) { 2795 if (Actions.ShouldEnterDeclaratorScope(getCurScope(), D.getCXXScopeSpec())) 2796 // Change the declaration context for name lookup, until this function 2797 // is exited (and the declarator has been parsed). 2798 DeclScopeObj.EnterDeclaratorScope(); 2799 } 2800 2801 if (Tok.is(tok::identifier) || Tok.is(tok::kw_operator) || 2802 Tok.is(tok::annot_template_id) || Tok.is(tok::tilde)) { 2803 // We found something that indicates the start of an unqualified-id. 2804 // Parse that unqualified-id. 2805 bool AllowConstructorName; 2806 if (D.getDeclSpec().hasTypeSpecifier()) 2807 AllowConstructorName = false; 2808 else if (D.getCXXScopeSpec().isSet()) 2809 AllowConstructorName = 2810 (D.getContext() == Declarator::FileContext || 2811 (D.getContext() == Declarator::MemberContext && 2812 D.getDeclSpec().isFriendSpecified())); 2813 else 2814 AllowConstructorName = (D.getContext() == Declarator::MemberContext); 2815 2816 if (ParseUnqualifiedId(D.getCXXScopeSpec(), 2817 /*EnteringContext=*/true, 2818 /*AllowDestructorName=*/true, 2819 AllowConstructorName, 2820 ParsedType(), 2821 D.getName()) || 2822 // Once we're past the identifier, if the scope was bad, mark the 2823 // whole declarator bad. 2824 D.getCXXScopeSpec().isInvalid()) { 2825 D.SetIdentifier(0, Tok.getLocation()); 2826 D.setInvalidType(true); 2827 } else { 2828 // Parsed the unqualified-id; update range information and move along. 2829 if (D.getSourceRange().getBegin().isInvalid()) 2830 D.SetRangeBegin(D.getName().getSourceRange().getBegin()); 2831 D.SetRangeEnd(D.getName().getSourceRange().getEnd()); 2832 } 2833 goto PastIdentifier; 2834 } 2835 } else if (Tok.is(tok::identifier) && D.mayHaveIdentifier()) { 2836 assert(!getLang().CPlusPlus && 2837 "There's a C++-specific check for tok::identifier above"); 2838 assert(Tok.getIdentifierInfo() && "Not an identifier?"); 2839 D.SetIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 2840 ConsumeToken(); 2841 goto PastIdentifier; 2842 } 2843 2844 if (Tok.is(tok::l_paren)) { 2845 // direct-declarator: '(' declarator ')' 2846 // direct-declarator: '(' attributes declarator ')' 2847 // Example: 'char (*X)' or 'int (*XX)(void)' 2848 ParseParenDeclarator(D); 2849 2850 // If the declarator was parenthesized, we entered the declarator 2851 // scope when parsing the parenthesized declarator, then exited 2852 // the scope already. Re-enter the scope, if we need to. 2853 if (D.getCXXScopeSpec().isSet()) { 2854 // If there was an error parsing parenthesized declarator, declarator 2855 // scope may have been enterred before. Don't do it again. 2856 if (!D.isInvalidType() && 2857 Actions.ShouldEnterDeclaratorScope(getCurScope(), D.getCXXScopeSpec())) 2858 // Change the declaration context for name lookup, until this function 2859 // is exited (and the declarator has been parsed). 2860 DeclScopeObj.EnterDeclaratorScope(); 2861 } 2862 } else if (D.mayOmitIdentifier()) { 2863 // This could be something simple like "int" (in which case the declarator 2864 // portion is empty), if an abstract-declarator is allowed. 2865 D.SetIdentifier(0, Tok.getLocation()); 2866 } else { 2867 if (D.getContext() == Declarator::MemberContext) 2868 Diag(Tok, diag::err_expected_member_name_or_semi) 2869 << D.getDeclSpec().getSourceRange(); 2870 else if (getLang().CPlusPlus) 2871 Diag(Tok, diag::err_expected_unqualified_id) << getLang().CPlusPlus; 2872 else 2873 Diag(Tok, diag::err_expected_ident_lparen); 2874 D.SetIdentifier(0, Tok.getLocation()); 2875 D.setInvalidType(true); 2876 } 2877 2878 PastIdentifier: 2879 assert(D.isPastIdentifier() && 2880 "Haven't past the location of the identifier yet?"); 2881 2882 // Don't parse attributes unless we have an identifier. 2883 if (D.getIdentifier() && getLang().CPlusPlus0x 2884 && isCXX0XAttributeSpecifier(true)) { 2885 SourceLocation AttrEndLoc; 2886 CXX0XAttributeList Attr = ParseCXX0XAttributes(); 2887 D.AddAttributes(Attr.AttrList, AttrEndLoc); 2888 } 2889 2890 while (1) { 2891 if (Tok.is(tok::l_paren)) { 2892 // The paren may be part of a C++ direct initializer, eg. "int x(1);". 2893 // In such a case, check if we actually have a function declarator; if it 2894 // is not, the declarator has been fully parsed. 2895 if (getLang().CPlusPlus && D.mayBeFollowedByCXXDirectInit()) { 2896 // When not in file scope, warn for ambiguous function declarators, just 2897 // in case the author intended it as a variable definition. 2898 bool warnIfAmbiguous = D.getContext() != Declarator::FileContext; 2899 if (!isCXXFunctionDeclarator(warnIfAmbiguous)) 2900 break; 2901 } 2902 ParseFunctionDeclarator(ConsumeParen(), D); 2903 } else if (Tok.is(tok::l_square)) { 2904 ParseBracketDeclarator(D); 2905 } else { 2906 break; 2907 } 2908 } 2909} 2910 2911/// ParseParenDeclarator - We parsed the declarator D up to a paren. This is 2912/// only called before the identifier, so these are most likely just grouping 2913/// parens for precedence. If we find that these are actually function 2914/// parameter parens in an abstract-declarator, we call ParseFunctionDeclarator. 2915/// 2916/// direct-declarator: 2917/// '(' declarator ')' 2918/// [GNU] '(' attributes declarator ')' 2919/// direct-declarator '(' parameter-type-list ')' 2920/// direct-declarator '(' identifier-list[opt] ')' 2921/// [GNU] direct-declarator '(' parameter-forward-declarations 2922/// parameter-type-list[opt] ')' 2923/// 2924void Parser::ParseParenDeclarator(Declarator &D) { 2925 SourceLocation StartLoc = ConsumeParen(); 2926 assert(!D.isPastIdentifier() && "Should be called before passing identifier"); 2927 2928 // Eat any attributes before we look at whether this is a grouping or function 2929 // declarator paren. If this is a grouping paren, the attribute applies to 2930 // the type being built up, for example: 2931 // int (__attribute__(()) *x)(long y) 2932 // If this ends up not being a grouping paren, the attribute applies to the 2933 // first argument, for example: 2934 // int (__attribute__(()) int x) 2935 // In either case, we need to eat any attributes to be able to determine what 2936 // sort of paren this is. 2937 // 2938 AttributeList *AttrList = 0; 2939 bool RequiresArg = false; 2940 if (Tok.is(tok::kw___attribute)) { 2941 AttrList = ParseGNUAttributes(); 2942 2943 // We require that the argument list (if this is a non-grouping paren) be 2944 // present even if the attribute list was empty. 2945 RequiresArg = true; 2946 } 2947 // Eat any Microsoft extensions. 2948 if (Tok.is(tok::kw___cdecl) || Tok.is(tok::kw___stdcall) || 2949 Tok.is(tok::kw___thiscall) || Tok.is(tok::kw___fastcall) || 2950 Tok.is(tok::kw___w64) || Tok.is(tok::kw___ptr64)) { 2951 AttrList = ParseMicrosoftTypeAttributes(AttrList); 2952 } 2953 // Eat any Borland extensions. 2954 if (Tok.is(tok::kw___pascal)) 2955 AttrList = ParseBorlandTypeAttributes(AttrList); 2956 2957 // If we haven't past the identifier yet (or where the identifier would be 2958 // stored, if this is an abstract declarator), then this is probably just 2959 // grouping parens. However, if this could be an abstract-declarator, then 2960 // this could also be the start of function arguments (consider 'void()'). 2961 bool isGrouping; 2962 2963 if (!D.mayOmitIdentifier()) { 2964 // If this can't be an abstract-declarator, this *must* be a grouping 2965 // paren, because we haven't seen the identifier yet. 2966 isGrouping = true; 2967 } else if (Tok.is(tok::r_paren) || // 'int()' is a function. 2968 (getLang().CPlusPlus && Tok.is(tok::ellipsis)) || // C++ int(...) 2969 isDeclarationSpecifier()) { // 'int(int)' is a function. 2970 // This handles C99 6.7.5.3p11: in "typedef int X; void foo(X)", X is 2971 // considered to be a type, not a K&R identifier-list. 2972 isGrouping = false; 2973 } else { 2974 // Otherwise, this is a grouping paren, e.g. 'int (*X)' or 'int(X)'. 2975 isGrouping = true; 2976 } 2977 2978 // If this is a grouping paren, handle: 2979 // direct-declarator: '(' declarator ')' 2980 // direct-declarator: '(' attributes declarator ')' 2981 if (isGrouping) { 2982 bool hadGroupingParens = D.hasGroupingParens(); 2983 D.setGroupingParens(true); 2984 if (AttrList) 2985 D.AddAttributes(AttrList, SourceLocation()); 2986 2987 ParseDeclaratorInternal(D, &Parser::ParseDirectDeclarator); 2988 // Match the ')'. 2989 SourceLocation Loc = MatchRHSPunctuation(tok::r_paren, StartLoc); 2990 2991 D.setGroupingParens(hadGroupingParens); 2992 D.SetRangeEnd(Loc); 2993 return; 2994 } 2995 2996 // Okay, if this wasn't a grouping paren, it must be the start of a function 2997 // argument list. Recognize that this declarator will never have an 2998 // identifier (and remember where it would have been), then call into 2999 // ParseFunctionDeclarator to handle of argument list. 3000 D.SetIdentifier(0, Tok.getLocation()); 3001 3002 ParseFunctionDeclarator(StartLoc, D, AttrList, RequiresArg); 3003} 3004 3005/// ParseFunctionDeclarator - We are after the identifier and have parsed the 3006/// declarator D up to a paren, which indicates that we are parsing function 3007/// arguments. 3008/// 3009/// If AttrList is non-null, then the caller parsed those arguments immediately 3010/// after the open paren - they should be considered to be the first argument of 3011/// a parameter. If RequiresArg is true, then the first argument of the 3012/// function is required to be present and required to not be an identifier 3013/// list. 3014/// 3015/// This method also handles this portion of the grammar: 3016/// parameter-type-list: [C99 6.7.5] 3017/// parameter-list 3018/// parameter-list ',' '...' 3019/// [C++] parameter-list '...' 3020/// 3021/// parameter-list: [C99 6.7.5] 3022/// parameter-declaration 3023/// parameter-list ',' parameter-declaration 3024/// 3025/// parameter-declaration: [C99 6.7.5] 3026/// declaration-specifiers declarator 3027/// [C++] declaration-specifiers declarator '=' assignment-expression 3028/// [GNU] declaration-specifiers declarator attributes 3029/// declaration-specifiers abstract-declarator[opt] 3030/// [C++] declaration-specifiers abstract-declarator[opt] 3031/// '=' assignment-expression 3032/// [GNU] declaration-specifiers abstract-declarator[opt] attributes 3033/// 3034/// For C++, after the parameter-list, it also parses "cv-qualifier-seq[opt]" 3035/// and "exception-specification[opt]". 3036/// 3037void Parser::ParseFunctionDeclarator(SourceLocation LParenLoc, Declarator &D, 3038 AttributeList *AttrList, 3039 bool RequiresArg) { 3040 // lparen is already consumed! 3041 assert(D.isPastIdentifier() && "Should not call before identifier!"); 3042 3043 ParsedType TrailingReturnType; 3044 3045 // This parameter list may be empty. 3046 if (Tok.is(tok::r_paren)) { 3047 if (RequiresArg) 3048 Diag(Tok, diag::err_argument_required_after_attribute); 3049 3050 SourceLocation RParenLoc = ConsumeParen(); // Eat the closing ')'. 3051 SourceLocation EndLoc = RParenLoc; 3052 3053 // cv-qualifier-seq[opt]. 3054 DeclSpec DS; 3055 bool hasExceptionSpec = false; 3056 SourceLocation ThrowLoc; 3057 bool hasAnyExceptionSpec = false; 3058 llvm::SmallVector<ParsedType, 2> Exceptions; 3059 llvm::SmallVector<SourceRange, 2> ExceptionRanges; 3060 if (getLang().CPlusPlus) { 3061 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 3062 if (!DS.getSourceRange().getEnd().isInvalid()) 3063 EndLoc = DS.getSourceRange().getEnd(); 3064 3065 // Parse exception-specification[opt]. 3066 if (Tok.is(tok::kw_throw)) { 3067 hasExceptionSpec = true; 3068 ThrowLoc = Tok.getLocation(); 3069 ParseExceptionSpecification(EndLoc, Exceptions, ExceptionRanges, 3070 hasAnyExceptionSpec); 3071 assert(Exceptions.size() == ExceptionRanges.size() && 3072 "Produced different number of exception types and ranges."); 3073 } 3074 3075 // Parse trailing-return-type. 3076 if (getLang().CPlusPlus0x && Tok.is(tok::arrow)) { 3077 TrailingReturnType = ParseTrailingReturnType().get(); 3078 } 3079 } 3080 3081 // Remember that we parsed a function type, and remember the attributes. 3082 // int() -> no prototype, no '...'. 3083 D.AddTypeInfo(DeclaratorChunk::getFunction(/*prototype*/getLang().CPlusPlus, 3084 /*variadic*/ false, 3085 SourceLocation(), 3086 /*arglist*/ 0, 0, 3087 DS.getTypeQualifiers(), 3088 hasExceptionSpec, ThrowLoc, 3089 hasAnyExceptionSpec, 3090 Exceptions.data(), 3091 ExceptionRanges.data(), 3092 Exceptions.size(), 3093 LParenLoc, RParenLoc, D, 3094 TrailingReturnType), 3095 EndLoc); 3096 return; 3097 } 3098 3099 // Alternatively, this parameter list may be an identifier list form for a 3100 // K&R-style function: void foo(a,b,c) 3101 if (!getLang().CPlusPlus && Tok.is(tok::identifier) 3102 && !TryAltiVecVectorToken()) { 3103 if (TryAnnotateTypeOrScopeToken() || !Tok.is(tok::annot_typename)) { 3104 // K&R identifier lists can't have typedefs as identifiers, per 3105 // C99 6.7.5.3p11. 3106 if (RequiresArg) 3107 Diag(Tok, diag::err_argument_required_after_attribute); 3108 3109 // Identifier list. Note that '(' identifier-list ')' is only allowed for 3110 // normal declarators, not for abstract-declarators. Get the first 3111 // identifier. 3112 Token FirstTok = Tok; 3113 ConsumeToken(); // eat the first identifier. 3114 3115 // Identifier lists follow a really simple grammar: the identifiers can 3116 // be followed *only* by a ", moreidentifiers" or ")". However, K&R 3117 // identifier lists are really rare in the brave new modern world, and it 3118 // is very common for someone to typo a type in a non-k&r style list. If 3119 // we are presented with something like: "void foo(intptr x, float y)", 3120 // we don't want to start parsing the function declarator as though it is 3121 // a K&R style declarator just because intptr is an invalid type. 3122 // 3123 // To handle this, we check to see if the token after the first identifier 3124 // is a "," or ")". Only if so, do we parse it as an identifier list. 3125 if (Tok.is(tok::comma) || Tok.is(tok::r_paren)) 3126 return ParseFunctionDeclaratorIdentifierList(LParenLoc, 3127 FirstTok.getIdentifierInfo(), 3128 FirstTok.getLocation(), D); 3129 3130 // If we get here, the code is invalid. Push the first identifier back 3131 // into the token stream and parse the first argument as an (invalid) 3132 // normal argument declarator. 3133 PP.EnterToken(Tok); 3134 Tok = FirstTok; 3135 } 3136 } 3137 3138 // Finally, a normal, non-empty parameter type list. 3139 3140 // Build up an array of information about the parsed arguments. 3141 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; 3142 3143 // Enter function-declaration scope, limiting any declarators to the 3144 // function prototype scope, including parameter declarators. 3145 ParseScope PrototypeScope(this, 3146 Scope::FunctionPrototypeScope|Scope::DeclScope); 3147 3148 bool IsVariadic = false; 3149 SourceLocation EllipsisLoc; 3150 while (1) { 3151 if (Tok.is(tok::ellipsis)) { 3152 IsVariadic = true; 3153 EllipsisLoc = ConsumeToken(); // Consume the ellipsis. 3154 break; 3155 } 3156 3157 // Skip any Microsoft attributes before a param. 3158 if (getLang().Microsoft && Tok.is(tok::l_square)) 3159 ParseMicrosoftAttributes(); 3160 3161 SourceLocation DSStart = Tok.getLocation(); 3162 3163 // Parse the declaration-specifiers. 3164 // Just use the ParsingDeclaration "scope" of the declarator. 3165 DeclSpec DS; 3166 3167 // If the caller parsed attributes for the first argument, add them now. 3168 if (AttrList) { 3169 DS.AddAttributes(AttrList); 3170 AttrList = 0; // Only apply the attributes to the first parameter. 3171 } 3172 ParseDeclarationSpecifiers(DS); 3173 3174 // Parse the declarator. This is "PrototypeContext", because we must 3175 // accept either 'declarator' or 'abstract-declarator' here. 3176 Declarator ParmDecl(DS, Declarator::PrototypeContext); 3177 ParseDeclarator(ParmDecl); 3178 3179 // Parse GNU attributes, if present. 3180 if (Tok.is(tok::kw___attribute)) { 3181 SourceLocation Loc; 3182 AttributeList *AttrList = ParseGNUAttributes(&Loc); 3183 ParmDecl.AddAttributes(AttrList, Loc); 3184 } 3185 3186 // Remember this parsed parameter in ParamInfo. 3187 IdentifierInfo *ParmII = ParmDecl.getIdentifier(); 3188 3189 // DefArgToks is used when the parsing of default arguments needs 3190 // to be delayed. 3191 CachedTokens *DefArgToks = 0; 3192 3193 // If no parameter was specified, verify that *something* was specified, 3194 // otherwise we have a missing type and identifier. 3195 if (DS.isEmpty() && ParmDecl.getIdentifier() == 0 && 3196 ParmDecl.getNumTypeObjects() == 0) { 3197 // Completely missing, emit error. 3198 Diag(DSStart, diag::err_missing_param); 3199 } else { 3200 // Otherwise, we have something. Add it and let semantic analysis try 3201 // to grok it and add the result to the ParamInfo we are building. 3202 3203 // Inform the actions module about the parameter declarator, so it gets 3204 // added to the current scope. 3205 Decl *Param = Actions.ActOnParamDeclarator(getCurScope(), ParmDecl); 3206 3207 // Parse the default argument, if any. We parse the default 3208 // arguments in all dialects; the semantic analysis in 3209 // ActOnParamDefaultArgument will reject the default argument in 3210 // C. 3211 if (Tok.is(tok::equal)) { 3212 SourceLocation EqualLoc = Tok.getLocation(); 3213 3214 // Parse the default argument 3215 if (D.getContext() == Declarator::MemberContext) { 3216 // If we're inside a class definition, cache the tokens 3217 // corresponding to the default argument. We'll actually parse 3218 // them when we see the end of the class definition. 3219 // FIXME: Templates will require something similar. 3220 // FIXME: Can we use a smart pointer for Toks? 3221 DefArgToks = new CachedTokens; 3222 3223 if (!ConsumeAndStoreUntil(tok::comma, tok::r_paren, *DefArgToks, 3224 /*StopAtSemi=*/true, 3225 /*ConsumeFinalToken=*/false)) { 3226 delete DefArgToks; 3227 DefArgToks = 0; 3228 Actions.ActOnParamDefaultArgumentError(Param); 3229 } else { 3230 // Mark the end of the default argument so that we know when to 3231 // stop when we parse it later on. 3232 Token DefArgEnd; 3233 DefArgEnd.startToken(); 3234 DefArgEnd.setKind(tok::cxx_defaultarg_end); 3235 DefArgEnd.setLocation(Tok.getLocation()); 3236 DefArgToks->push_back(DefArgEnd); 3237 Actions.ActOnParamUnparsedDefaultArgument(Param, EqualLoc, 3238 (*DefArgToks)[1].getLocation()); 3239 } 3240 } else { 3241 // Consume the '='. 3242 ConsumeToken(); 3243 3244 // The argument isn't actually potentially evaluated unless it is 3245 // used. 3246 EnterExpressionEvaluationContext Eval(Actions, 3247 Sema::PotentiallyEvaluatedIfUsed); 3248 3249 ExprResult DefArgResult(ParseAssignmentExpression()); 3250 if (DefArgResult.isInvalid()) { 3251 Actions.ActOnParamDefaultArgumentError(Param); 3252 SkipUntil(tok::comma, tok::r_paren, true, true); 3253 } else { 3254 // Inform the actions module about the default argument 3255 Actions.ActOnParamDefaultArgument(Param, EqualLoc, 3256 DefArgResult.take()); 3257 } 3258 } 3259 } 3260 3261 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, 3262 ParmDecl.getIdentifierLoc(), Param, 3263 DefArgToks)); 3264 } 3265 3266 // If the next token is a comma, consume it and keep reading arguments. 3267 if (Tok.isNot(tok::comma)) { 3268 if (Tok.is(tok::ellipsis)) { 3269 IsVariadic = true; 3270 EllipsisLoc = ConsumeToken(); // Consume the ellipsis. 3271 3272 if (!getLang().CPlusPlus) { 3273 // We have ellipsis without a preceding ',', which is ill-formed 3274 // in C. Complain and provide the fix. 3275 Diag(EllipsisLoc, diag::err_missing_comma_before_ellipsis) 3276 << FixItHint::CreateInsertion(EllipsisLoc, ", "); 3277 } 3278 } 3279 3280 break; 3281 } 3282 3283 // Consume the comma. 3284 ConsumeToken(); 3285 } 3286 3287 // If we have the closing ')', eat it. 3288 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 3289 SourceLocation EndLoc = RParenLoc; 3290 3291 DeclSpec DS; 3292 bool hasExceptionSpec = false; 3293 SourceLocation ThrowLoc; 3294 bool hasAnyExceptionSpec = false; 3295 llvm::SmallVector<ParsedType, 2> Exceptions; 3296 llvm::SmallVector<SourceRange, 2> ExceptionRanges; 3297 3298 if (getLang().CPlusPlus) { 3299 // Parse cv-qualifier-seq[opt]. 3300 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 3301 if (!DS.getSourceRange().getEnd().isInvalid()) 3302 EndLoc = DS.getSourceRange().getEnd(); 3303 3304 // Parse exception-specification[opt]. 3305 if (Tok.is(tok::kw_throw)) { 3306 hasExceptionSpec = true; 3307 ThrowLoc = Tok.getLocation(); 3308 ParseExceptionSpecification(EndLoc, Exceptions, ExceptionRanges, 3309 hasAnyExceptionSpec); 3310 assert(Exceptions.size() == ExceptionRanges.size() && 3311 "Produced different number of exception types and ranges."); 3312 } 3313 3314 // Parse trailing-return-type. 3315 if (getLang().CPlusPlus0x && Tok.is(tok::arrow)) { 3316 TrailingReturnType = ParseTrailingReturnType().get(); 3317 } 3318 } 3319 3320 // FIXME: We should leave the prototype scope before parsing the exception 3321 // specification, and then reenter it when parsing the trailing return type. 3322 3323 // Leave prototype scope. 3324 PrototypeScope.Exit(); 3325 3326 // Remember that we parsed a function type, and remember the attributes. 3327 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/true, IsVariadic, 3328 EllipsisLoc, 3329 ParamInfo.data(), ParamInfo.size(), 3330 DS.getTypeQualifiers(), 3331 hasExceptionSpec, ThrowLoc, 3332 hasAnyExceptionSpec, 3333 Exceptions.data(), 3334 ExceptionRanges.data(), 3335 Exceptions.size(), 3336 LParenLoc, RParenLoc, D, 3337 TrailingReturnType), 3338 EndLoc); 3339} 3340 3341/// ParseFunctionDeclaratorIdentifierList - While parsing a function declarator 3342/// we found a K&R-style identifier list instead of a type argument list. The 3343/// first identifier has already been consumed, and the current token is the 3344/// token right after it. 3345/// 3346/// identifier-list: [C99 6.7.5] 3347/// identifier 3348/// identifier-list ',' identifier 3349/// 3350void Parser::ParseFunctionDeclaratorIdentifierList(SourceLocation LParenLoc, 3351 IdentifierInfo *FirstIdent, 3352 SourceLocation FirstIdentLoc, 3353 Declarator &D) { 3354 // Build up an array of information about the parsed arguments. 3355 llvm::SmallVector<DeclaratorChunk::ParamInfo, 16> ParamInfo; 3356 llvm::SmallSet<const IdentifierInfo*, 16> ParamsSoFar; 3357 3358 // If there was no identifier specified for the declarator, either we are in 3359 // an abstract-declarator, or we are in a parameter declarator which was found 3360 // to be abstract. In abstract-declarators, identifier lists are not valid: 3361 // diagnose this. 3362 if (!D.getIdentifier()) 3363 Diag(FirstIdentLoc, diag::ext_ident_list_in_param); 3364 3365 // The first identifier was already read, and is known to be the first 3366 // identifier in the list. Remember this identifier in ParamInfo. 3367 ParamsSoFar.insert(FirstIdent); 3368 ParamInfo.push_back(DeclaratorChunk::ParamInfo(FirstIdent, FirstIdentLoc, 0)); 3369 3370 while (Tok.is(tok::comma)) { 3371 // Eat the comma. 3372 ConsumeToken(); 3373 3374 // If this isn't an identifier, report the error and skip until ')'. 3375 if (Tok.isNot(tok::identifier)) { 3376 Diag(Tok, diag::err_expected_ident); 3377 SkipUntil(tok::r_paren); 3378 return; 3379 } 3380 3381 IdentifierInfo *ParmII = Tok.getIdentifierInfo(); 3382 3383 // Reject 'typedef int y; int test(x, y)', but continue parsing. 3384 if (Actions.getTypeName(*ParmII, Tok.getLocation(), getCurScope())) 3385 Diag(Tok, diag::err_unexpected_typedef_ident) << ParmII; 3386 3387 // Verify that the argument identifier has not already been mentioned. 3388 if (!ParamsSoFar.insert(ParmII)) { 3389 Diag(Tok, diag::err_param_redefinition) << ParmII; 3390 } else { 3391 // Remember this identifier in ParamInfo. 3392 ParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII, 3393 Tok.getLocation(), 3394 0)); 3395 } 3396 3397 // Eat the identifier. 3398 ConsumeToken(); 3399 } 3400 3401 // If we have the closing ')', eat it and we're done. 3402 SourceLocation RLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 3403 3404 // Remember that we parsed a function type, and remember the attributes. This 3405 // function type is always a K&R style function type, which is not varargs and 3406 // has no prototype. 3407 D.AddTypeInfo(DeclaratorChunk::getFunction(/*proto*/false, /*varargs*/false, 3408 SourceLocation(), 3409 &ParamInfo[0], ParamInfo.size(), 3410 /*TypeQuals*/0, 3411 /*exception*/false, 3412 SourceLocation(), false, 0, 0, 0, 3413 LParenLoc, RLoc, D), 3414 RLoc); 3415} 3416 3417/// [C90] direct-declarator '[' constant-expression[opt] ']' 3418/// [C99] direct-declarator '[' type-qual-list[opt] assignment-expr[opt] ']' 3419/// [C99] direct-declarator '[' 'static' type-qual-list[opt] assign-expr ']' 3420/// [C99] direct-declarator '[' type-qual-list 'static' assignment-expr ']' 3421/// [C99] direct-declarator '[' type-qual-list[opt] '*' ']' 3422void Parser::ParseBracketDeclarator(Declarator &D) { 3423 SourceLocation StartLoc = ConsumeBracket(); 3424 3425 // C array syntax has many features, but by-far the most common is [] and [4]. 3426 // This code does a fast path to handle some of the most obvious cases. 3427 if (Tok.getKind() == tok::r_square) { 3428 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 3429 //FIXME: Use these 3430 CXX0XAttributeList Attr; 3431 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier(true)) { 3432 Attr = ParseCXX0XAttributes(); 3433 } 3434 3435 // Remember that we parsed the empty array type. 3436 ExprResult NumElements; 3437 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, false, 0, 3438 StartLoc, EndLoc), 3439 EndLoc); 3440 return; 3441 } else if (Tok.getKind() == tok::numeric_constant && 3442 GetLookAheadToken(1).is(tok::r_square)) { 3443 // [4] is very common. Parse the numeric constant expression. 3444 ExprResult ExprRes(Actions.ActOnNumericConstant(Tok)); 3445 ConsumeToken(); 3446 3447 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 3448 //FIXME: Use these 3449 CXX0XAttributeList Attr; 3450 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 3451 Attr = ParseCXX0XAttributes(); 3452 } 3453 3454 // If there was an error parsing the assignment-expression, recover. 3455 if (ExprRes.isInvalid()) 3456 ExprRes.release(); // Deallocate expr, just use []. 3457 3458 // Remember that we parsed a array type, and remember its features. 3459 D.AddTypeInfo(DeclaratorChunk::getArray(0, false, 0, ExprRes.release(), 3460 StartLoc, EndLoc), 3461 EndLoc); 3462 return; 3463 } 3464 3465 // If valid, this location is the position where we read the 'static' keyword. 3466 SourceLocation StaticLoc; 3467 if (Tok.is(tok::kw_static)) 3468 StaticLoc = ConsumeToken(); 3469 3470 // If there is a type-qualifier-list, read it now. 3471 // Type qualifiers in an array subscript are a C99 feature. 3472 DeclSpec DS; 3473 ParseTypeQualifierListOpt(DS, false /*no attributes*/); 3474 3475 // If we haven't already read 'static', check to see if there is one after the 3476 // type-qualifier-list. 3477 if (!StaticLoc.isValid() && Tok.is(tok::kw_static)) 3478 StaticLoc = ConsumeToken(); 3479 3480 // Handle "direct-declarator [ type-qual-list[opt] * ]". 3481 bool isStar = false; 3482 ExprResult NumElements; 3483 3484 // Handle the case where we have '[*]' as the array size. However, a leading 3485 // star could be the start of an expression, for example 'X[*p + 4]'. Verify 3486 // the the token after the star is a ']'. Since stars in arrays are 3487 // infrequent, use of lookahead is not costly here. 3488 if (Tok.is(tok::star) && GetLookAheadToken(1).is(tok::r_square)) { 3489 ConsumeToken(); // Eat the '*'. 3490 3491 if (StaticLoc.isValid()) { 3492 Diag(StaticLoc, diag::err_unspecified_vla_size_with_static); 3493 StaticLoc = SourceLocation(); // Drop the static. 3494 } 3495 isStar = true; 3496 } else if (Tok.isNot(tok::r_square)) { 3497 // Note, in C89, this production uses the constant-expr production instead 3498 // of assignment-expr. The only difference is that assignment-expr allows 3499 // things like '=' and '*='. Sema rejects these in C89 mode because they 3500 // are not i-c-e's, so we don't need to distinguish between the two here. 3501 3502 // Parse the constant-expression or assignment-expression now (depending 3503 // on dialect). 3504 if (getLang().CPlusPlus) 3505 NumElements = ParseConstantExpression(); 3506 else 3507 NumElements = ParseAssignmentExpression(); 3508 } 3509 3510 // If there was an error parsing the assignment-expression, recover. 3511 if (NumElements.isInvalid()) { 3512 D.setInvalidType(true); 3513 // If the expression was invalid, skip it. 3514 SkipUntil(tok::r_square); 3515 return; 3516 } 3517 3518 SourceLocation EndLoc = MatchRHSPunctuation(tok::r_square, StartLoc); 3519 3520 //FIXME: Use these 3521 CXX0XAttributeList Attr; 3522 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 3523 Attr = ParseCXX0XAttributes(); 3524 } 3525 3526 // Remember that we parsed a array type, and remember its features. 3527 D.AddTypeInfo(DeclaratorChunk::getArray(DS.getTypeQualifiers(), 3528 StaticLoc.isValid(), isStar, 3529 NumElements.release(), 3530 StartLoc, EndLoc), 3531 EndLoc); 3532} 3533 3534/// [GNU] typeof-specifier: 3535/// typeof ( expressions ) 3536/// typeof ( type-name ) 3537/// [GNU/C++] typeof unary-expression 3538/// 3539void Parser::ParseTypeofSpecifier(DeclSpec &DS) { 3540 assert(Tok.is(tok::kw_typeof) && "Not a typeof specifier"); 3541 Token OpTok = Tok; 3542 SourceLocation StartLoc = ConsumeToken(); 3543 3544 const bool hasParens = Tok.is(tok::l_paren); 3545 3546 bool isCastExpr; 3547 ParsedType CastTy; 3548 SourceRange CastRange; 3549 ExprResult Operand = ParseExprAfterTypeofSizeofAlignof(OpTok, 3550 isCastExpr, 3551 CastTy, 3552 CastRange); 3553 if (hasParens) 3554 DS.setTypeofParensRange(CastRange); 3555 3556 if (CastRange.getEnd().isInvalid()) 3557 // FIXME: Not accurate, the range gets one token more than it should. 3558 DS.SetRangeEnd(Tok.getLocation()); 3559 else 3560 DS.SetRangeEnd(CastRange.getEnd()); 3561 3562 if (isCastExpr) { 3563 if (!CastTy) { 3564 DS.SetTypeSpecError(); 3565 return; 3566 } 3567 3568 const char *PrevSpec = 0; 3569 unsigned DiagID; 3570 // Check for duplicate type specifiers (e.g. "int typeof(int)"). 3571 if (DS.SetTypeSpecType(DeclSpec::TST_typeofType, StartLoc, PrevSpec, 3572 DiagID, CastTy)) 3573 Diag(StartLoc, DiagID) << PrevSpec; 3574 return; 3575 } 3576 3577 // If we get here, the operand to the typeof was an expresion. 3578 if (Operand.isInvalid()) { 3579 DS.SetTypeSpecError(); 3580 return; 3581 } 3582 3583 const char *PrevSpec = 0; 3584 unsigned DiagID; 3585 // Check for duplicate type specifiers (e.g. "int typeof(int)"). 3586 if (DS.SetTypeSpecType(DeclSpec::TST_typeofExpr, StartLoc, PrevSpec, 3587 DiagID, Operand.get())) 3588 Diag(StartLoc, DiagID) << PrevSpec; 3589} 3590 3591 3592/// TryAltiVecVectorTokenOutOfLine - Out of line body that should only be called 3593/// from TryAltiVecVectorToken. 3594bool Parser::TryAltiVecVectorTokenOutOfLine() { 3595 Token Next = NextToken(); 3596 switch (Next.getKind()) { 3597 default: return false; 3598 case tok::kw_short: 3599 case tok::kw_long: 3600 case tok::kw_signed: 3601 case tok::kw_unsigned: 3602 case tok::kw_void: 3603 case tok::kw_char: 3604 case tok::kw_int: 3605 case tok::kw_float: 3606 case tok::kw_double: 3607 case tok::kw_bool: 3608 case tok::kw___pixel: 3609 Tok.setKind(tok::kw___vector); 3610 return true; 3611 case tok::identifier: 3612 if (Next.getIdentifierInfo() == Ident_pixel) { 3613 Tok.setKind(tok::kw___vector); 3614 return true; 3615 } 3616 return false; 3617 } 3618} 3619 3620bool Parser::TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc, 3621 const char *&PrevSpec, unsigned &DiagID, 3622 bool &isInvalid) { 3623 if (Tok.getIdentifierInfo() == Ident_vector) { 3624 Token Next = NextToken(); 3625 switch (Next.getKind()) { 3626 case tok::kw_short: 3627 case tok::kw_long: 3628 case tok::kw_signed: 3629 case tok::kw_unsigned: 3630 case tok::kw_void: 3631 case tok::kw_char: 3632 case tok::kw_int: 3633 case tok::kw_float: 3634 case tok::kw_double: 3635 case tok::kw_bool: 3636 case tok::kw___pixel: 3637 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 3638 return true; 3639 case tok::identifier: 3640 if (Next.getIdentifierInfo() == Ident_pixel) { 3641 isInvalid = DS.SetTypeAltiVecVector(true, Loc, PrevSpec, DiagID); 3642 return true; 3643 } 3644 break; 3645 default: 3646 break; 3647 } 3648 } else if ((Tok.getIdentifierInfo() == Ident_pixel) && 3649 DS.isTypeAltiVecVector()) { 3650 isInvalid = DS.SetTypeAltiVecPixel(true, Loc, PrevSpec, DiagID); 3651 return true; 3652 } 3653 return false; 3654} 3655 3656