ParseExprCXX.cpp revision 194613
1193326Sed//===--- ParseExprCXX.cpp - C++ Expression Parsing ------------------------===// 2193326Sed// 3193326Sed// The LLVM Compiler Infrastructure 4193326Sed// 5193326Sed// This file is distributed under the University of Illinois Open Source 6193326Sed// License. See LICENSE.TXT for details. 7193326Sed// 8193326Sed//===----------------------------------------------------------------------===// 9193326Sed// 10193326Sed// This file implements the Expression parsing implementation for C++. 11193326Sed// 12193326Sed//===----------------------------------------------------------------------===// 13193326Sed 14193326Sed#include "clang/Parse/ParseDiagnostic.h" 15193326Sed#include "clang/Parse/Parser.h" 16193326Sed#include "clang/Parse/DeclSpec.h" 17193326Sedusing namespace clang; 18193326Sed 19193326Sed/// ParseOptionalCXXScopeSpecifier - Parse global scope or 20193326Sed/// nested-name-specifier if present. Returns true if a nested-name-specifier 21193326Sed/// was parsed from the token stream. Note that this routine will not parse 22193326Sed/// ::new or ::delete, it will just leave them in the token stream. 23193326Sed/// 24193326Sed/// '::'[opt] nested-name-specifier 25193326Sed/// '::' 26193326Sed/// 27193326Sed/// nested-name-specifier: 28193326Sed/// type-name '::' 29193326Sed/// namespace-name '::' 30193326Sed/// nested-name-specifier identifier '::' 31193326Sed/// nested-name-specifier 'template'[opt] simple-template-id '::' [TODO] 32193326Sed/// 33193326Sedbool Parser::ParseOptionalCXXScopeSpecifier(CXXScopeSpec &SS) { 34193326Sed assert(getLang().CPlusPlus && 35193326Sed "Call sites of this function should be guarded by checking for C++"); 36193326Sed 37193326Sed if (Tok.is(tok::annot_cxxscope)) { 38193326Sed SS.setScopeRep(Tok.getAnnotationValue()); 39193326Sed SS.setRange(Tok.getAnnotationRange()); 40193326Sed ConsumeToken(); 41193326Sed return true; 42193326Sed } 43193326Sed 44193326Sed bool HasScopeSpecifier = false; 45193326Sed 46193326Sed if (Tok.is(tok::coloncolon)) { 47193326Sed // ::new and ::delete aren't nested-name-specifiers. 48193326Sed tok::TokenKind NextKind = NextToken().getKind(); 49193326Sed if (NextKind == tok::kw_new || NextKind == tok::kw_delete) 50193326Sed return false; 51193326Sed 52193326Sed // '::' - Global scope qualifier. 53193326Sed SourceLocation CCLoc = ConsumeToken(); 54193326Sed SS.setBeginLoc(CCLoc); 55193326Sed SS.setScopeRep(Actions.ActOnCXXGlobalScopeSpecifier(CurScope, CCLoc)); 56193326Sed SS.setEndLoc(CCLoc); 57193326Sed HasScopeSpecifier = true; 58193326Sed } 59193326Sed 60193326Sed while (true) { 61193326Sed // nested-name-specifier: 62193326Sed // type-name '::' 63193326Sed // namespace-name '::' 64193326Sed // nested-name-specifier identifier '::' 65193326Sed if (Tok.is(tok::identifier) && NextToken().is(tok::coloncolon)) { 66193326Sed // We have an identifier followed by a '::'. Lookup this name 67193326Sed // as the name in a nested-name-specifier. 68193326Sed IdentifierInfo *II = Tok.getIdentifierInfo(); 69193326Sed SourceLocation IdLoc = ConsumeToken(); 70193326Sed assert(Tok.is(tok::coloncolon) && "NextToken() not working properly!"); 71193326Sed SourceLocation CCLoc = ConsumeToken(); 72193326Sed 73193326Sed if (!HasScopeSpecifier) { 74193326Sed SS.setBeginLoc(IdLoc); 75193326Sed HasScopeSpecifier = true; 76193326Sed } 77193326Sed 78193326Sed if (SS.isInvalid()) 79193326Sed continue; 80193326Sed 81193326Sed SS.setScopeRep( 82193326Sed Actions.ActOnCXXNestedNameSpecifier(CurScope, SS, IdLoc, CCLoc, *II)); 83193326Sed SS.setEndLoc(CCLoc); 84193326Sed continue; 85193326Sed } 86193326Sed 87193326Sed // nested-name-specifier: 88193326Sed // type-name '::' 89193326Sed // nested-name-specifier 'template'[opt] simple-template-id '::' 90193326Sed if ((Tok.is(tok::identifier) && NextToken().is(tok::less)) || 91193326Sed Tok.is(tok::kw_template)) { 92193326Sed // Parse the optional 'template' keyword, then make sure we have 93193326Sed // 'identifier <' after it. 94193326Sed if (Tok.is(tok::kw_template)) { 95193326Sed SourceLocation TemplateKWLoc = ConsumeToken(); 96193326Sed 97193326Sed if (Tok.isNot(tok::identifier)) { 98193326Sed Diag(Tok.getLocation(), 99193326Sed diag::err_id_after_template_in_nested_name_spec) 100193326Sed << SourceRange(TemplateKWLoc); 101193326Sed break; 102193326Sed } 103193326Sed 104193326Sed if (NextToken().isNot(tok::less)) { 105193326Sed Diag(NextToken().getLocation(), 106193326Sed diag::err_less_after_template_name_in_nested_name_spec) 107193326Sed << Tok.getIdentifierInfo()->getName() 108193326Sed << SourceRange(TemplateKWLoc, Tok.getLocation()); 109193326Sed break; 110193326Sed } 111193326Sed 112193326Sed TemplateTy Template 113193326Sed = Actions.ActOnDependentTemplateName(TemplateKWLoc, 114193326Sed *Tok.getIdentifierInfo(), 115193326Sed Tok.getLocation(), 116193326Sed SS); 117193326Sed AnnotateTemplateIdToken(Template, TNK_Dependent_template_name, 118193326Sed &SS, TemplateKWLoc, false); 119193326Sed continue; 120193326Sed } 121193326Sed 122193326Sed TemplateTy Template; 123193326Sed TemplateNameKind TNK = Actions.isTemplateName(*Tok.getIdentifierInfo(), 124193326Sed CurScope, Template, &SS); 125193326Sed if (TNK) { 126193326Sed // We have found a template name, so annotate this this token 127193326Sed // with a template-id annotation. We do not permit the 128193326Sed // template-id to be translated into a type annotation, 129193326Sed // because some clients (e.g., the parsing of class template 130193326Sed // specializations) still want to see the original template-id 131193326Sed // token. 132193326Sed AnnotateTemplateIdToken(Template, TNK, &SS, SourceLocation(), false); 133193326Sed continue; 134193326Sed } 135193326Sed } 136193326Sed 137193326Sed if (Tok.is(tok::annot_template_id) && NextToken().is(tok::coloncolon)) { 138193326Sed // We have 139193326Sed // 140193326Sed // simple-template-id '::' 141193326Sed // 142193326Sed // So we need to check whether the simple-template-id is of the 143193326Sed // right kind (it should name a type or be dependent), and then 144193326Sed // convert it into a type within the nested-name-specifier. 145193326Sed TemplateIdAnnotation *TemplateId 146193326Sed = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 147193326Sed 148193326Sed if (TemplateId->Kind == TNK_Type_template || 149193326Sed TemplateId->Kind == TNK_Dependent_template_name) { 150193326Sed AnnotateTemplateIdTokenAsType(&SS); 151193326Sed SS.setScopeRep(0); 152193326Sed 153193326Sed assert(Tok.is(tok::annot_typename) && 154193326Sed "AnnotateTemplateIdTokenAsType isn't working"); 155193326Sed Token TypeToken = Tok; 156193326Sed ConsumeToken(); 157193326Sed assert(Tok.is(tok::coloncolon) && "NextToken() not working properly!"); 158193326Sed SourceLocation CCLoc = ConsumeToken(); 159193326Sed 160193326Sed if (!HasScopeSpecifier) { 161193326Sed SS.setBeginLoc(TypeToken.getLocation()); 162193326Sed HasScopeSpecifier = true; 163193326Sed } 164193326Sed 165193326Sed if (TypeToken.getAnnotationValue()) 166193326Sed SS.setScopeRep( 167193326Sed Actions.ActOnCXXNestedNameSpecifier(CurScope, SS, 168193326Sed TypeToken.getAnnotationValue(), 169193326Sed TypeToken.getAnnotationRange(), 170193326Sed CCLoc)); 171193326Sed else 172193326Sed SS.setScopeRep(0); 173193326Sed SS.setEndLoc(CCLoc); 174193326Sed continue; 175193326Sed } else 176193326Sed assert(false && "FIXME: Only type template names supported here"); 177193326Sed } 178193326Sed 179193326Sed // We don't have any tokens that form the beginning of a 180193326Sed // nested-name-specifier, so we're done. 181193326Sed break; 182193326Sed } 183193326Sed 184193326Sed return HasScopeSpecifier; 185193326Sed} 186193326Sed 187193326Sed/// ParseCXXIdExpression - Handle id-expression. 188193326Sed/// 189193326Sed/// id-expression: 190193326Sed/// unqualified-id 191193326Sed/// qualified-id 192193326Sed/// 193193326Sed/// unqualified-id: 194193326Sed/// identifier 195193326Sed/// operator-function-id 196193326Sed/// conversion-function-id [TODO] 197193326Sed/// '~' class-name [TODO] 198193326Sed/// template-id [TODO] 199193326Sed/// 200193326Sed/// qualified-id: 201193326Sed/// '::'[opt] nested-name-specifier 'template'[opt] unqualified-id 202193326Sed/// '::' identifier 203193326Sed/// '::' operator-function-id 204193326Sed/// '::' template-id [TODO] 205193326Sed/// 206193326Sed/// nested-name-specifier: 207193326Sed/// type-name '::' 208193326Sed/// namespace-name '::' 209193326Sed/// nested-name-specifier identifier '::' 210193326Sed/// nested-name-specifier 'template'[opt] simple-template-id '::' [TODO] 211193326Sed/// 212193326Sed/// NOTE: The standard specifies that, for qualified-id, the parser does not 213193326Sed/// expect: 214193326Sed/// 215193326Sed/// '::' conversion-function-id 216193326Sed/// '::' '~' class-name 217193326Sed/// 218193326Sed/// This may cause a slight inconsistency on diagnostics: 219193326Sed/// 220193326Sed/// class C {}; 221193326Sed/// namespace A {} 222193326Sed/// void f() { 223193326Sed/// :: A :: ~ C(); // Some Sema error about using destructor with a 224193326Sed/// // namespace. 225193326Sed/// :: ~ C(); // Some Parser error like 'unexpected ~'. 226193326Sed/// } 227193326Sed/// 228193326Sed/// We simplify the parser a bit and make it work like: 229193326Sed/// 230193326Sed/// qualified-id: 231193326Sed/// '::'[opt] nested-name-specifier 'template'[opt] unqualified-id 232193326Sed/// '::' unqualified-id 233193326Sed/// 234193326Sed/// That way Sema can handle and report similar errors for namespaces and the 235193326Sed/// global scope. 236193326Sed/// 237193326Sed/// The isAddressOfOperand parameter indicates that this id-expression is a 238193326Sed/// direct operand of the address-of operator. This is, besides member contexts, 239193326Sed/// the only place where a qualified-id naming a non-static class member may 240193326Sed/// appear. 241193326Sed/// 242193326SedParser::OwningExprResult Parser::ParseCXXIdExpression(bool isAddressOfOperand) { 243193326Sed // qualified-id: 244193326Sed // '::'[opt] nested-name-specifier 'template'[opt] unqualified-id 245193326Sed // '::' unqualified-id 246193326Sed // 247193326Sed CXXScopeSpec SS; 248193326Sed ParseOptionalCXXScopeSpecifier(SS); 249193326Sed 250193326Sed // unqualified-id: 251193326Sed // identifier 252193326Sed // operator-function-id 253193326Sed // conversion-function-id 254193326Sed // '~' class-name [TODO] 255193326Sed // template-id [TODO] 256193326Sed // 257193326Sed switch (Tok.getKind()) { 258193326Sed default: 259193326Sed return ExprError(Diag(Tok, diag::err_expected_unqualified_id)); 260193326Sed 261193326Sed case tok::identifier: { 262193326Sed // Consume the identifier so that we can see if it is followed by a '('. 263193326Sed IdentifierInfo &II = *Tok.getIdentifierInfo(); 264193326Sed SourceLocation L = ConsumeToken(); 265193326Sed return Actions.ActOnIdentifierExpr(CurScope, L, II, Tok.is(tok::l_paren), 266193326Sed &SS, isAddressOfOperand); 267193326Sed } 268193326Sed 269193326Sed case tok::kw_operator: { 270193326Sed SourceLocation OperatorLoc = Tok.getLocation(); 271193326Sed if (OverloadedOperatorKind Op = TryParseOperatorFunctionId()) 272193326Sed return Actions.ActOnCXXOperatorFunctionIdExpr( 273193326Sed CurScope, OperatorLoc, Op, Tok.is(tok::l_paren), SS, 274193326Sed isAddressOfOperand); 275193326Sed if (TypeTy *Type = ParseConversionFunctionId()) 276193326Sed return Actions.ActOnCXXConversionFunctionExpr(CurScope, OperatorLoc, Type, 277193326Sed Tok.is(tok::l_paren), SS, 278193326Sed isAddressOfOperand); 279193326Sed 280193326Sed // We already complained about a bad conversion-function-id, 281193326Sed // above. 282193326Sed return ExprError(); 283193326Sed } 284193326Sed 285193326Sed } // switch. 286193326Sed 287193326Sed assert(0 && "The switch was supposed to take care everything."); 288193326Sed} 289193326Sed 290193326Sed/// ParseCXXCasts - This handles the various ways to cast expressions to another 291193326Sed/// type. 292193326Sed/// 293193326Sed/// postfix-expression: [C++ 5.2p1] 294193326Sed/// 'dynamic_cast' '<' type-name '>' '(' expression ')' 295193326Sed/// 'static_cast' '<' type-name '>' '(' expression ')' 296193326Sed/// 'reinterpret_cast' '<' type-name '>' '(' expression ')' 297193326Sed/// 'const_cast' '<' type-name '>' '(' expression ')' 298193326Sed/// 299193326SedParser::OwningExprResult Parser::ParseCXXCasts() { 300193326Sed tok::TokenKind Kind = Tok.getKind(); 301193326Sed const char *CastName = 0; // For error messages 302193326Sed 303193326Sed switch (Kind) { 304193326Sed default: assert(0 && "Unknown C++ cast!"); abort(); 305193326Sed case tok::kw_const_cast: CastName = "const_cast"; break; 306193326Sed case tok::kw_dynamic_cast: CastName = "dynamic_cast"; break; 307193326Sed case tok::kw_reinterpret_cast: CastName = "reinterpret_cast"; break; 308193326Sed case tok::kw_static_cast: CastName = "static_cast"; break; 309193326Sed } 310193326Sed 311193326Sed SourceLocation OpLoc = ConsumeToken(); 312193326Sed SourceLocation LAngleBracketLoc = Tok.getLocation(); 313193326Sed 314193326Sed if (ExpectAndConsume(tok::less, diag::err_expected_less_after, CastName)) 315193326Sed return ExprError(); 316193326Sed 317193326Sed TypeResult CastTy = ParseTypeName(); 318193326Sed SourceLocation RAngleBracketLoc = Tok.getLocation(); 319193326Sed 320193326Sed if (ExpectAndConsume(tok::greater, diag::err_expected_greater)) 321193326Sed return ExprError(Diag(LAngleBracketLoc, diag::note_matching) << "<"); 322193326Sed 323193326Sed SourceLocation LParenLoc = Tok.getLocation(), RParenLoc; 324193326Sed 325193326Sed if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, CastName)) 326193326Sed return ExprError(); 327193326Sed 328193326Sed OwningExprResult Result = ParseExpression(); 329193326Sed 330193326Sed // Match the ')'. 331193326Sed if (Result.isInvalid()) 332193326Sed SkipUntil(tok::r_paren); 333193326Sed 334193326Sed if (Tok.is(tok::r_paren)) 335193326Sed RParenLoc = ConsumeParen(); 336193326Sed else 337193326Sed MatchRHSPunctuation(tok::r_paren, LParenLoc); 338193326Sed 339193326Sed if (!Result.isInvalid() && !CastTy.isInvalid()) 340193326Sed Result = Actions.ActOnCXXNamedCast(OpLoc, Kind, 341193326Sed LAngleBracketLoc, CastTy.get(), 342193326Sed RAngleBracketLoc, 343193326Sed LParenLoc, move(Result), RParenLoc); 344193326Sed 345193326Sed return move(Result); 346193326Sed} 347193326Sed 348193326Sed/// ParseCXXTypeid - This handles the C++ typeid expression. 349193326Sed/// 350193326Sed/// postfix-expression: [C++ 5.2p1] 351193326Sed/// 'typeid' '(' expression ')' 352193326Sed/// 'typeid' '(' type-id ')' 353193326Sed/// 354193326SedParser::OwningExprResult Parser::ParseCXXTypeid() { 355193326Sed assert(Tok.is(tok::kw_typeid) && "Not 'typeid'!"); 356193326Sed 357193326Sed SourceLocation OpLoc = ConsumeToken(); 358193326Sed SourceLocation LParenLoc = Tok.getLocation(); 359193326Sed SourceLocation RParenLoc; 360193326Sed 361193326Sed // typeid expressions are always parenthesized. 362193326Sed if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, 363193326Sed "typeid")) 364193326Sed return ExprError(); 365193326Sed 366193326Sed OwningExprResult Result(Actions); 367193326Sed 368193326Sed if (isTypeIdInParens()) { 369193326Sed TypeResult Ty = ParseTypeName(); 370193326Sed 371193326Sed // Match the ')'. 372193326Sed MatchRHSPunctuation(tok::r_paren, LParenLoc); 373193326Sed 374193326Sed if (Ty.isInvalid()) 375193326Sed return ExprError(); 376193326Sed 377193326Sed Result = Actions.ActOnCXXTypeid(OpLoc, LParenLoc, /*isType=*/true, 378193326Sed Ty.get(), RParenLoc); 379193326Sed } else { 380194613Sed // C++0x [expr.typeid]p3: 381194613Sed // When typeid is applied to an expression other than an lvalue of a 382194613Sed // polymorphic class type [...] The expression is an unevaluated 383194613Sed // operand (Clause 5). 384194613Sed // 385194613Sed // Note that we can't tell whether the expression is an lvalue of a 386194613Sed // polymorphic class type until after we've parsed the expression, so 387194613Sed // we treat the expression as an unevaluated operand and let semantic 388194613Sed // analysis cope with case where the expression is not an unevaluated 389194613Sed // operand. 390194613Sed EnterUnevaluatedOperand Unevaluated(Actions); 391193326Sed Result = ParseExpression(); 392193326Sed 393193326Sed // Match the ')'. 394193326Sed if (Result.isInvalid()) 395193326Sed SkipUntil(tok::r_paren); 396193326Sed else { 397193326Sed MatchRHSPunctuation(tok::r_paren, LParenLoc); 398193326Sed 399193326Sed Result = Actions.ActOnCXXTypeid(OpLoc, LParenLoc, /*isType=*/false, 400193326Sed Result.release(), RParenLoc); 401193326Sed } 402193326Sed } 403193326Sed 404193326Sed return move(Result); 405193326Sed} 406193326Sed 407193326Sed/// ParseCXXBoolLiteral - This handles the C++ Boolean literals. 408193326Sed/// 409193326Sed/// boolean-literal: [C++ 2.13.5] 410193326Sed/// 'true' 411193326Sed/// 'false' 412193326SedParser::OwningExprResult Parser::ParseCXXBoolLiteral() { 413193326Sed tok::TokenKind Kind = Tok.getKind(); 414193326Sed return Actions.ActOnCXXBoolLiteral(ConsumeToken(), Kind); 415193326Sed} 416193326Sed 417193326Sed/// ParseThrowExpression - This handles the C++ throw expression. 418193326Sed/// 419193326Sed/// throw-expression: [C++ 15] 420193326Sed/// 'throw' assignment-expression[opt] 421193326SedParser::OwningExprResult Parser::ParseThrowExpression() { 422193326Sed assert(Tok.is(tok::kw_throw) && "Not throw!"); 423193326Sed SourceLocation ThrowLoc = ConsumeToken(); // Eat the throw token. 424193326Sed 425193326Sed // If the current token isn't the start of an assignment-expression, 426193326Sed // then the expression is not present. This handles things like: 427193326Sed // "C ? throw : (void)42", which is crazy but legal. 428193326Sed switch (Tok.getKind()) { // FIXME: move this predicate somewhere common. 429193326Sed case tok::semi: 430193326Sed case tok::r_paren: 431193326Sed case tok::r_square: 432193326Sed case tok::r_brace: 433193326Sed case tok::colon: 434193326Sed case tok::comma: 435193326Sed return Actions.ActOnCXXThrow(ThrowLoc, ExprArg(Actions)); 436193326Sed 437193326Sed default: 438193326Sed OwningExprResult Expr(ParseAssignmentExpression()); 439193326Sed if (Expr.isInvalid()) return move(Expr); 440193326Sed return Actions.ActOnCXXThrow(ThrowLoc, move(Expr)); 441193326Sed } 442193326Sed} 443193326Sed 444193326Sed/// ParseCXXThis - This handles the C++ 'this' pointer. 445193326Sed/// 446193326Sed/// C++ 9.3.2: In the body of a non-static member function, the keyword this is 447193326Sed/// a non-lvalue expression whose value is the address of the object for which 448193326Sed/// the function is called. 449193326SedParser::OwningExprResult Parser::ParseCXXThis() { 450193326Sed assert(Tok.is(tok::kw_this) && "Not 'this'!"); 451193326Sed SourceLocation ThisLoc = ConsumeToken(); 452193326Sed return Actions.ActOnCXXThis(ThisLoc); 453193326Sed} 454193326Sed 455193326Sed/// ParseCXXTypeConstructExpression - Parse construction of a specified type. 456193326Sed/// Can be interpreted either as function-style casting ("int(x)") 457193326Sed/// or class type construction ("ClassType(x,y,z)") 458193326Sed/// or creation of a value-initialized type ("int()"). 459193326Sed/// 460193326Sed/// postfix-expression: [C++ 5.2p1] 461193326Sed/// simple-type-specifier '(' expression-list[opt] ')' [C++ 5.2.3] 462193326Sed/// typename-specifier '(' expression-list[opt] ')' [TODO] 463193326Sed/// 464193326SedParser::OwningExprResult 465193326SedParser::ParseCXXTypeConstructExpression(const DeclSpec &DS) { 466193326Sed Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); 467193326Sed TypeTy *TypeRep = Actions.ActOnTypeName(CurScope, DeclaratorInfo).get(); 468193326Sed 469193326Sed assert(Tok.is(tok::l_paren) && "Expected '('!"); 470193326Sed SourceLocation LParenLoc = ConsumeParen(); 471193326Sed 472193326Sed ExprVector Exprs(Actions); 473193326Sed CommaLocsTy CommaLocs; 474193326Sed 475193326Sed if (Tok.isNot(tok::r_paren)) { 476193326Sed if (ParseExpressionList(Exprs, CommaLocs)) { 477193326Sed SkipUntil(tok::r_paren); 478193326Sed return ExprError(); 479193326Sed } 480193326Sed } 481193326Sed 482193326Sed // Match the ')'. 483193326Sed SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 484193326Sed 485193326Sed assert((Exprs.size() == 0 || Exprs.size()-1 == CommaLocs.size())&& 486193326Sed "Unexpected number of commas!"); 487193326Sed return Actions.ActOnCXXTypeConstructExpr(DS.getSourceRange(), TypeRep, 488193326Sed LParenLoc, move_arg(Exprs), 489193326Sed CommaLocs.data(), RParenLoc); 490193326Sed} 491193326Sed 492193326Sed/// ParseCXXCondition - if/switch/while/for condition expression. 493193326Sed/// 494193326Sed/// condition: 495193326Sed/// expression 496193326Sed/// type-specifier-seq declarator '=' assignment-expression 497193326Sed/// [GNU] type-specifier-seq declarator simple-asm-expr[opt] attributes[opt] 498193326Sed/// '=' assignment-expression 499193326Sed/// 500193326SedParser::OwningExprResult Parser::ParseCXXCondition() { 501193326Sed if (!isCXXConditionDeclaration()) 502193326Sed return ParseExpression(); // expression 503193326Sed 504193326Sed SourceLocation StartLoc = Tok.getLocation(); 505193326Sed 506193326Sed // type-specifier-seq 507193326Sed DeclSpec DS; 508193326Sed ParseSpecifierQualifierList(DS); 509193326Sed 510193326Sed // declarator 511193326Sed Declarator DeclaratorInfo(DS, Declarator::ConditionContext); 512193326Sed ParseDeclarator(DeclaratorInfo); 513193326Sed 514193326Sed // simple-asm-expr[opt] 515193326Sed if (Tok.is(tok::kw_asm)) { 516193326Sed SourceLocation Loc; 517193326Sed OwningExprResult AsmLabel(ParseSimpleAsm(&Loc)); 518193326Sed if (AsmLabel.isInvalid()) { 519193326Sed SkipUntil(tok::semi); 520193326Sed return ExprError(); 521193326Sed } 522193326Sed DeclaratorInfo.setAsmLabel(AsmLabel.release()); 523193326Sed DeclaratorInfo.SetRangeEnd(Loc); 524193326Sed } 525193326Sed 526193326Sed // If attributes are present, parse them. 527193326Sed if (Tok.is(tok::kw___attribute)) { 528193326Sed SourceLocation Loc; 529193326Sed AttributeList *AttrList = ParseAttributes(&Loc); 530193326Sed DeclaratorInfo.AddAttributes(AttrList, Loc); 531193326Sed } 532193326Sed 533193326Sed // '=' assignment-expression 534193326Sed if (Tok.isNot(tok::equal)) 535193326Sed return ExprError(Diag(Tok, diag::err_expected_equal_after_declarator)); 536193326Sed SourceLocation EqualLoc = ConsumeToken(); 537193326Sed OwningExprResult AssignExpr(ParseAssignmentExpression()); 538193326Sed if (AssignExpr.isInvalid()) 539193326Sed return ExprError(); 540193326Sed 541193326Sed return Actions.ActOnCXXConditionDeclarationExpr(CurScope, StartLoc, 542193326Sed DeclaratorInfo,EqualLoc, 543193326Sed move(AssignExpr)); 544193326Sed} 545193326Sed 546193326Sed/// ParseCXXSimpleTypeSpecifier - [C++ 7.1.5.2] Simple type specifiers. 547193326Sed/// This should only be called when the current token is known to be part of 548193326Sed/// simple-type-specifier. 549193326Sed/// 550193326Sed/// simple-type-specifier: 551193326Sed/// '::'[opt] nested-name-specifier[opt] type-name 552193326Sed/// '::'[opt] nested-name-specifier 'template' simple-template-id [TODO] 553193326Sed/// char 554193326Sed/// wchar_t 555193326Sed/// bool 556193326Sed/// short 557193326Sed/// int 558193326Sed/// long 559193326Sed/// signed 560193326Sed/// unsigned 561193326Sed/// float 562193326Sed/// double 563193326Sed/// void 564193326Sed/// [GNU] typeof-specifier 565193326Sed/// [C++0x] auto [TODO] 566193326Sed/// 567193326Sed/// type-name: 568193326Sed/// class-name 569193326Sed/// enum-name 570193326Sed/// typedef-name 571193326Sed/// 572193326Sedvoid Parser::ParseCXXSimpleTypeSpecifier(DeclSpec &DS) { 573193326Sed DS.SetRangeStart(Tok.getLocation()); 574193326Sed const char *PrevSpec; 575193326Sed SourceLocation Loc = Tok.getLocation(); 576193326Sed 577193326Sed switch (Tok.getKind()) { 578193326Sed case tok::identifier: // foo::bar 579193326Sed case tok::coloncolon: // ::foo::bar 580193326Sed assert(0 && "Annotation token should already be formed!"); 581193326Sed default: 582193326Sed assert(0 && "Not a simple-type-specifier token!"); 583193326Sed abort(); 584193326Sed 585193326Sed // type-name 586193326Sed case tok::annot_typename: { 587193326Sed DS.SetTypeSpecType(DeclSpec::TST_typename, Loc, PrevSpec, 588193326Sed Tok.getAnnotationValue()); 589193326Sed break; 590193326Sed } 591193326Sed 592193326Sed // builtin types 593193326Sed case tok::kw_short: 594193326Sed DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec); 595193326Sed break; 596193326Sed case tok::kw_long: 597193326Sed DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec); 598193326Sed break; 599193326Sed case tok::kw_signed: 600193326Sed DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec); 601193326Sed break; 602193326Sed case tok::kw_unsigned: 603193326Sed DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec); 604193326Sed break; 605193326Sed case tok::kw_void: 606193326Sed DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec); 607193326Sed break; 608193326Sed case tok::kw_char: 609193326Sed DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec); 610193326Sed break; 611193326Sed case tok::kw_int: 612193326Sed DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec); 613193326Sed break; 614193326Sed case tok::kw_float: 615193326Sed DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec); 616193326Sed break; 617193326Sed case tok::kw_double: 618193326Sed DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec); 619193326Sed break; 620193326Sed case tok::kw_wchar_t: 621193326Sed DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec); 622193326Sed break; 623193326Sed case tok::kw_bool: 624193326Sed DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec); 625193326Sed break; 626193326Sed 627193326Sed // GNU typeof support. 628193326Sed case tok::kw_typeof: 629193326Sed ParseTypeofSpecifier(DS); 630193326Sed DS.Finish(Diags, PP); 631193326Sed return; 632193326Sed } 633193326Sed if (Tok.is(tok::annot_typename)) 634193326Sed DS.SetRangeEnd(Tok.getAnnotationEndLoc()); 635193326Sed else 636193326Sed DS.SetRangeEnd(Tok.getLocation()); 637193326Sed ConsumeToken(); 638193326Sed DS.Finish(Diags, PP); 639193326Sed} 640193326Sed 641193326Sed/// ParseCXXTypeSpecifierSeq - Parse a C++ type-specifier-seq (C++ 642193326Sed/// [dcl.name]), which is a non-empty sequence of type-specifiers, 643193326Sed/// e.g., "const short int". Note that the DeclSpec is *not* finished 644193326Sed/// by parsing the type-specifier-seq, because these sequences are 645193326Sed/// typically followed by some form of declarator. Returns true and 646193326Sed/// emits diagnostics if this is not a type-specifier-seq, false 647193326Sed/// otherwise. 648193326Sed/// 649193326Sed/// type-specifier-seq: [C++ 8.1] 650193326Sed/// type-specifier type-specifier-seq[opt] 651193326Sed/// 652193326Sedbool Parser::ParseCXXTypeSpecifierSeq(DeclSpec &DS) { 653193326Sed DS.SetRangeStart(Tok.getLocation()); 654193326Sed const char *PrevSpec = 0; 655193326Sed int isInvalid = 0; 656193326Sed 657193326Sed // Parse one or more of the type specifiers. 658193326Sed if (!ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec)) { 659193326Sed Diag(Tok, diag::err_operator_missing_type_specifier); 660193326Sed return true; 661193326Sed } 662193326Sed 663193326Sed while (ParseOptionalTypeSpecifier(DS, isInvalid, PrevSpec)) ; 664193326Sed 665193326Sed return false; 666193326Sed} 667193326Sed 668193326Sed/// TryParseOperatorFunctionId - Attempts to parse a C++ overloaded 669193326Sed/// operator name (C++ [over.oper]). If successful, returns the 670193326Sed/// predefined identifier that corresponds to that overloaded 671193326Sed/// operator. Otherwise, returns NULL and does not consume any tokens. 672193326Sed/// 673193326Sed/// operator-function-id: [C++ 13.5] 674193326Sed/// 'operator' operator 675193326Sed/// 676193326Sed/// operator: one of 677193326Sed/// new delete new[] delete[] 678193326Sed/// + - * / % ^ & | ~ 679193326Sed/// ! = < > += -= *= /= %= 680193326Sed/// ^= &= |= << >> >>= <<= == != 681193326Sed/// <= >= && || ++ -- , ->* -> 682193326Sed/// () [] 683193326SedOverloadedOperatorKind 684193326SedParser::TryParseOperatorFunctionId(SourceLocation *EndLoc) { 685193326Sed assert(Tok.is(tok::kw_operator) && "Expected 'operator' keyword"); 686193326Sed SourceLocation Loc; 687193326Sed 688193326Sed OverloadedOperatorKind Op = OO_None; 689193326Sed switch (NextToken().getKind()) { 690193326Sed case tok::kw_new: 691193326Sed ConsumeToken(); // 'operator' 692193326Sed Loc = ConsumeToken(); // 'new' 693193326Sed if (Tok.is(tok::l_square)) { 694193326Sed ConsumeBracket(); // '[' 695193326Sed Loc = Tok.getLocation(); 696193326Sed ExpectAndConsume(tok::r_square, diag::err_expected_rsquare); // ']' 697193326Sed Op = OO_Array_New; 698193326Sed } else { 699193326Sed Op = OO_New; 700193326Sed } 701193326Sed if (EndLoc) 702193326Sed *EndLoc = Loc; 703193326Sed return Op; 704193326Sed 705193326Sed case tok::kw_delete: 706193326Sed ConsumeToken(); // 'operator' 707193326Sed Loc = ConsumeToken(); // 'delete' 708193326Sed if (Tok.is(tok::l_square)) { 709193326Sed ConsumeBracket(); // '[' 710193326Sed Loc = Tok.getLocation(); 711193326Sed ExpectAndConsume(tok::r_square, diag::err_expected_rsquare); // ']' 712193326Sed Op = OO_Array_Delete; 713193326Sed } else { 714193326Sed Op = OO_Delete; 715193326Sed } 716193326Sed if (EndLoc) 717193326Sed *EndLoc = Loc; 718193326Sed return Op; 719193326Sed 720193326Sed#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \ 721193326Sed case tok::Token: Op = OO_##Name; break; 722193326Sed#define OVERLOADED_OPERATOR_MULTI(Name,Spelling,Unary,Binary,MemberOnly) 723193326Sed#include "clang/Basic/OperatorKinds.def" 724193326Sed 725193326Sed case tok::l_paren: 726193326Sed ConsumeToken(); // 'operator' 727193326Sed ConsumeParen(); // '(' 728193326Sed Loc = Tok.getLocation(); 729193326Sed ExpectAndConsume(tok::r_paren, diag::err_expected_rparen); // ')' 730193326Sed if (EndLoc) 731193326Sed *EndLoc = Loc; 732193326Sed return OO_Call; 733193326Sed 734193326Sed case tok::l_square: 735193326Sed ConsumeToken(); // 'operator' 736193326Sed ConsumeBracket(); // '[' 737193326Sed Loc = Tok.getLocation(); 738193326Sed ExpectAndConsume(tok::r_square, diag::err_expected_rsquare); // ']' 739193326Sed if (EndLoc) 740193326Sed *EndLoc = Loc; 741193326Sed return OO_Subscript; 742193326Sed 743193326Sed default: 744193326Sed return OO_None; 745193326Sed } 746193326Sed 747193326Sed ConsumeToken(); // 'operator' 748193326Sed Loc = ConsumeAnyToken(); // the operator itself 749193326Sed if (EndLoc) 750193326Sed *EndLoc = Loc; 751193326Sed return Op; 752193326Sed} 753193326Sed 754193326Sed/// ParseConversionFunctionId - Parse a C++ conversion-function-id, 755193326Sed/// which expresses the name of a user-defined conversion operator 756193326Sed/// (C++ [class.conv.fct]p1). Returns the type that this operator is 757193326Sed/// specifying a conversion for, or NULL if there was an error. 758193326Sed/// 759193326Sed/// conversion-function-id: [C++ 12.3.2] 760193326Sed/// operator conversion-type-id 761193326Sed/// 762193326Sed/// conversion-type-id: 763193326Sed/// type-specifier-seq conversion-declarator[opt] 764193326Sed/// 765193326Sed/// conversion-declarator: 766193326Sed/// ptr-operator conversion-declarator[opt] 767193326SedParser::TypeTy *Parser::ParseConversionFunctionId(SourceLocation *EndLoc) { 768193326Sed assert(Tok.is(tok::kw_operator) && "Expected 'operator' keyword"); 769193326Sed ConsumeToken(); // 'operator' 770193326Sed 771193326Sed // Parse the type-specifier-seq. 772193326Sed DeclSpec DS; 773193326Sed if (ParseCXXTypeSpecifierSeq(DS)) 774193326Sed return 0; 775193326Sed 776193326Sed // Parse the conversion-declarator, which is merely a sequence of 777193326Sed // ptr-operators. 778193326Sed Declarator D(DS, Declarator::TypeNameContext); 779193326Sed ParseDeclaratorInternal(D, /*DirectDeclParser=*/0); 780193326Sed if (EndLoc) 781193326Sed *EndLoc = D.getSourceRange().getEnd(); 782193326Sed 783193326Sed // Finish up the type. 784193326Sed Action::TypeResult Result = Actions.ActOnTypeName(CurScope, D); 785193326Sed if (Result.isInvalid()) 786193326Sed return 0; 787193326Sed else 788193326Sed return Result.get(); 789193326Sed} 790193326Sed 791193326Sed/// ParseCXXNewExpression - Parse a C++ new-expression. New is used to allocate 792193326Sed/// memory in a typesafe manner and call constructors. 793193326Sed/// 794193326Sed/// This method is called to parse the new expression after the optional :: has 795193326Sed/// been already parsed. If the :: was present, "UseGlobal" is true and "Start" 796193326Sed/// is its location. Otherwise, "Start" is the location of the 'new' token. 797193326Sed/// 798193326Sed/// new-expression: 799193326Sed/// '::'[opt] 'new' new-placement[opt] new-type-id 800193326Sed/// new-initializer[opt] 801193326Sed/// '::'[opt] 'new' new-placement[opt] '(' type-id ')' 802193326Sed/// new-initializer[opt] 803193326Sed/// 804193326Sed/// new-placement: 805193326Sed/// '(' expression-list ')' 806193326Sed/// 807193326Sed/// new-type-id: 808193326Sed/// type-specifier-seq new-declarator[opt] 809193326Sed/// 810193326Sed/// new-declarator: 811193326Sed/// ptr-operator new-declarator[opt] 812193326Sed/// direct-new-declarator 813193326Sed/// 814193326Sed/// new-initializer: 815193326Sed/// '(' expression-list[opt] ')' 816193326Sed/// [C++0x] braced-init-list [TODO] 817193326Sed/// 818193326SedParser::OwningExprResult 819193326SedParser::ParseCXXNewExpression(bool UseGlobal, SourceLocation Start) { 820193326Sed assert(Tok.is(tok::kw_new) && "expected 'new' token"); 821193326Sed ConsumeToken(); // Consume 'new' 822193326Sed 823193326Sed // A '(' now can be a new-placement or the '(' wrapping the type-id in the 824193326Sed // second form of new-expression. It can't be a new-type-id. 825193326Sed 826193326Sed ExprVector PlacementArgs(Actions); 827193326Sed SourceLocation PlacementLParen, PlacementRParen; 828193326Sed 829193326Sed bool ParenTypeId; 830193326Sed DeclSpec DS; 831193326Sed Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); 832193326Sed if (Tok.is(tok::l_paren)) { 833193326Sed // If it turns out to be a placement, we change the type location. 834193326Sed PlacementLParen = ConsumeParen(); 835193326Sed if (ParseExpressionListOrTypeId(PlacementArgs, DeclaratorInfo)) { 836193326Sed SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true); 837193326Sed return ExprError(); 838193326Sed } 839193326Sed 840193326Sed PlacementRParen = MatchRHSPunctuation(tok::r_paren, PlacementLParen); 841193326Sed if (PlacementRParen.isInvalid()) { 842193326Sed SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true); 843193326Sed return ExprError(); 844193326Sed } 845193326Sed 846193326Sed if (PlacementArgs.empty()) { 847193326Sed // Reset the placement locations. There was no placement. 848193326Sed PlacementLParen = PlacementRParen = SourceLocation(); 849193326Sed ParenTypeId = true; 850193326Sed } else { 851193326Sed // We still need the type. 852193326Sed if (Tok.is(tok::l_paren)) { 853193326Sed SourceLocation LParen = ConsumeParen(); 854193326Sed ParseSpecifierQualifierList(DS); 855193326Sed DeclaratorInfo.SetSourceRange(DS.getSourceRange()); 856193326Sed ParseDeclarator(DeclaratorInfo); 857193326Sed MatchRHSPunctuation(tok::r_paren, LParen); 858193326Sed ParenTypeId = true; 859193326Sed } else { 860193326Sed if (ParseCXXTypeSpecifierSeq(DS)) 861193326Sed DeclaratorInfo.setInvalidType(true); 862193326Sed else { 863193326Sed DeclaratorInfo.SetSourceRange(DS.getSourceRange()); 864193326Sed ParseDeclaratorInternal(DeclaratorInfo, 865193326Sed &Parser::ParseDirectNewDeclarator); 866193326Sed } 867193326Sed ParenTypeId = false; 868193326Sed } 869193326Sed } 870193326Sed } else { 871193326Sed // A new-type-id is a simplified type-id, where essentially the 872193326Sed // direct-declarator is replaced by a direct-new-declarator. 873193326Sed if (ParseCXXTypeSpecifierSeq(DS)) 874193326Sed DeclaratorInfo.setInvalidType(true); 875193326Sed else { 876193326Sed DeclaratorInfo.SetSourceRange(DS.getSourceRange()); 877193326Sed ParseDeclaratorInternal(DeclaratorInfo, 878193326Sed &Parser::ParseDirectNewDeclarator); 879193326Sed } 880193326Sed ParenTypeId = false; 881193326Sed } 882193326Sed if (DeclaratorInfo.isInvalidType()) { 883193326Sed SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true); 884193326Sed return ExprError(); 885193326Sed } 886193326Sed 887193326Sed ExprVector ConstructorArgs(Actions); 888193326Sed SourceLocation ConstructorLParen, ConstructorRParen; 889193326Sed 890193326Sed if (Tok.is(tok::l_paren)) { 891193326Sed ConstructorLParen = ConsumeParen(); 892193326Sed if (Tok.isNot(tok::r_paren)) { 893193326Sed CommaLocsTy CommaLocs; 894193326Sed if (ParseExpressionList(ConstructorArgs, CommaLocs)) { 895193326Sed SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true); 896193326Sed return ExprError(); 897193326Sed } 898193326Sed } 899193326Sed ConstructorRParen = MatchRHSPunctuation(tok::r_paren, ConstructorLParen); 900193326Sed if (ConstructorRParen.isInvalid()) { 901193326Sed SkipUntil(tok::semi, /*StopAtSemi=*/true, /*DontConsume=*/true); 902193326Sed return ExprError(); 903193326Sed } 904193326Sed } 905193326Sed 906193326Sed return Actions.ActOnCXXNew(Start, UseGlobal, PlacementLParen, 907193326Sed move_arg(PlacementArgs), PlacementRParen, 908193326Sed ParenTypeId, DeclaratorInfo, ConstructorLParen, 909193326Sed move_arg(ConstructorArgs), ConstructorRParen); 910193326Sed} 911193326Sed 912193326Sed/// ParseDirectNewDeclarator - Parses a direct-new-declarator. Intended to be 913193326Sed/// passed to ParseDeclaratorInternal. 914193326Sed/// 915193326Sed/// direct-new-declarator: 916193326Sed/// '[' expression ']' 917193326Sed/// direct-new-declarator '[' constant-expression ']' 918193326Sed/// 919193326Sedvoid Parser::ParseDirectNewDeclarator(Declarator &D) { 920193326Sed // Parse the array dimensions. 921193326Sed bool first = true; 922193326Sed while (Tok.is(tok::l_square)) { 923193326Sed SourceLocation LLoc = ConsumeBracket(); 924193326Sed OwningExprResult Size(first ? ParseExpression() 925193326Sed : ParseConstantExpression()); 926193326Sed if (Size.isInvalid()) { 927193326Sed // Recover 928193326Sed SkipUntil(tok::r_square); 929193326Sed return; 930193326Sed } 931193326Sed first = false; 932193326Sed 933193326Sed SourceLocation RLoc = MatchRHSPunctuation(tok::r_square, LLoc); 934193326Sed D.AddTypeInfo(DeclaratorChunk::getArray(0, /*static=*/false, /*star=*/false, 935193326Sed Size.release(), LLoc), 936193326Sed RLoc); 937193326Sed 938193326Sed if (RLoc.isInvalid()) 939193326Sed return; 940193326Sed } 941193326Sed} 942193326Sed 943193326Sed/// ParseExpressionListOrTypeId - Parse either an expression-list or a type-id. 944193326Sed/// This ambiguity appears in the syntax of the C++ new operator. 945193326Sed/// 946193326Sed/// new-expression: 947193326Sed/// '::'[opt] 'new' new-placement[opt] '(' type-id ')' 948193326Sed/// new-initializer[opt] 949193326Sed/// 950193326Sed/// new-placement: 951193326Sed/// '(' expression-list ')' 952193326Sed/// 953193326Sedbool Parser::ParseExpressionListOrTypeId(ExprListTy &PlacementArgs, 954193326Sed Declarator &D) { 955193326Sed // The '(' was already consumed. 956193326Sed if (isTypeIdInParens()) { 957193326Sed ParseSpecifierQualifierList(D.getMutableDeclSpec()); 958193326Sed D.SetSourceRange(D.getDeclSpec().getSourceRange()); 959193326Sed ParseDeclarator(D); 960193326Sed return D.isInvalidType(); 961193326Sed } 962193326Sed 963193326Sed // It's not a type, it has to be an expression list. 964193326Sed // Discard the comma locations - ActOnCXXNew has enough parameters. 965193326Sed CommaLocsTy CommaLocs; 966193326Sed return ParseExpressionList(PlacementArgs, CommaLocs); 967193326Sed} 968193326Sed 969193326Sed/// ParseCXXDeleteExpression - Parse a C++ delete-expression. Delete is used 970193326Sed/// to free memory allocated by new. 971193326Sed/// 972193326Sed/// This method is called to parse the 'delete' expression after the optional 973193326Sed/// '::' has been already parsed. If the '::' was present, "UseGlobal" is true 974193326Sed/// and "Start" is its location. Otherwise, "Start" is the location of the 975193326Sed/// 'delete' token. 976193326Sed/// 977193326Sed/// delete-expression: 978193326Sed/// '::'[opt] 'delete' cast-expression 979193326Sed/// '::'[opt] 'delete' '[' ']' cast-expression 980193326SedParser::OwningExprResult 981193326SedParser::ParseCXXDeleteExpression(bool UseGlobal, SourceLocation Start) { 982193326Sed assert(Tok.is(tok::kw_delete) && "Expected 'delete' keyword"); 983193326Sed ConsumeToken(); // Consume 'delete' 984193326Sed 985193326Sed // Array delete? 986193326Sed bool ArrayDelete = false; 987193326Sed if (Tok.is(tok::l_square)) { 988193326Sed ArrayDelete = true; 989193326Sed SourceLocation LHS = ConsumeBracket(); 990193326Sed SourceLocation RHS = MatchRHSPunctuation(tok::r_square, LHS); 991193326Sed if (RHS.isInvalid()) 992193326Sed return ExprError(); 993193326Sed } 994193326Sed 995193326Sed OwningExprResult Operand(ParseCastExpression(false)); 996193326Sed if (Operand.isInvalid()) 997193326Sed return move(Operand); 998193326Sed 999193326Sed return Actions.ActOnCXXDelete(Start, UseGlobal, ArrayDelete, move(Operand)); 1000193326Sed} 1001193326Sed 1002193326Sedstatic UnaryTypeTrait UnaryTypeTraitFromTokKind(tok::TokenKind kind) 1003193326Sed{ 1004193326Sed switch(kind) { 1005193326Sed default: assert(false && "Not a known unary type trait."); 1006193326Sed case tok::kw___has_nothrow_assign: return UTT_HasNothrowAssign; 1007193326Sed case tok::kw___has_nothrow_copy: return UTT_HasNothrowCopy; 1008193326Sed case tok::kw___has_nothrow_constructor: return UTT_HasNothrowConstructor; 1009193326Sed case tok::kw___has_trivial_assign: return UTT_HasTrivialAssign; 1010193326Sed case tok::kw___has_trivial_copy: return UTT_HasTrivialCopy; 1011193326Sed case tok::kw___has_trivial_constructor: return UTT_HasTrivialConstructor; 1012193326Sed case tok::kw___has_trivial_destructor: return UTT_HasTrivialDestructor; 1013193326Sed case tok::kw___has_virtual_destructor: return UTT_HasVirtualDestructor; 1014193326Sed case tok::kw___is_abstract: return UTT_IsAbstract; 1015193326Sed case tok::kw___is_class: return UTT_IsClass; 1016193326Sed case tok::kw___is_empty: return UTT_IsEmpty; 1017193326Sed case tok::kw___is_enum: return UTT_IsEnum; 1018193326Sed case tok::kw___is_pod: return UTT_IsPOD; 1019193326Sed case tok::kw___is_polymorphic: return UTT_IsPolymorphic; 1020193326Sed case tok::kw___is_union: return UTT_IsUnion; 1021193326Sed } 1022193326Sed} 1023193326Sed 1024193326Sed/// ParseUnaryTypeTrait - Parse the built-in unary type-trait 1025193326Sed/// pseudo-functions that allow implementation of the TR1/C++0x type traits 1026193326Sed/// templates. 1027193326Sed/// 1028193326Sed/// primary-expression: 1029193326Sed/// [GNU] unary-type-trait '(' type-id ')' 1030193326Sed/// 1031193326SedParser::OwningExprResult Parser::ParseUnaryTypeTrait() 1032193326Sed{ 1033193326Sed UnaryTypeTrait UTT = UnaryTypeTraitFromTokKind(Tok.getKind()); 1034193326Sed SourceLocation Loc = ConsumeToken(); 1035193326Sed 1036193326Sed SourceLocation LParen = Tok.getLocation(); 1037193326Sed if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen)) 1038193326Sed return ExprError(); 1039193326Sed 1040193326Sed // FIXME: Error reporting absolutely sucks! If the this fails to parse a type 1041193326Sed // there will be cryptic errors about mismatched parentheses and missing 1042193326Sed // specifiers. 1043193326Sed TypeResult Ty = ParseTypeName(); 1044193326Sed 1045193326Sed SourceLocation RParen = MatchRHSPunctuation(tok::r_paren, LParen); 1046193326Sed 1047193326Sed if (Ty.isInvalid()) 1048193326Sed return ExprError(); 1049193326Sed 1050193326Sed return Actions.ActOnUnaryTypeTrait(UTT, Loc, LParen, Ty.get(), RParen); 1051193326Sed} 1052193326Sed 1053193326Sed/// ParseCXXAmbiguousParenExpression - We have parsed the left paren of a 1054193326Sed/// parenthesized ambiguous type-id. This uses tentative parsing to disambiguate 1055193326Sed/// based on the context past the parens. 1056193326SedParser::OwningExprResult 1057193326SedParser::ParseCXXAmbiguousParenExpression(ParenParseOption &ExprType, 1058193326Sed TypeTy *&CastTy, 1059193326Sed SourceLocation LParenLoc, 1060193326Sed SourceLocation &RParenLoc) { 1061193326Sed assert(getLang().CPlusPlus && "Should only be called for C++!"); 1062193326Sed assert(ExprType == CastExpr && "Compound literals are not ambiguous!"); 1063193326Sed assert(isTypeIdInParens() && "Not a type-id!"); 1064193326Sed 1065193326Sed OwningExprResult Result(Actions, true); 1066193326Sed CastTy = 0; 1067193326Sed 1068193326Sed // We need to disambiguate a very ugly part of the C++ syntax: 1069193326Sed // 1070193326Sed // (T())x; - type-id 1071193326Sed // (T())*x; - type-id 1072193326Sed // (T())/x; - expression 1073193326Sed // (T()); - expression 1074193326Sed // 1075193326Sed // The bad news is that we cannot use the specialized tentative parser, since 1076193326Sed // it can only verify that the thing inside the parens can be parsed as 1077193326Sed // type-id, it is not useful for determining the context past the parens. 1078193326Sed // 1079193326Sed // The good news is that the parser can disambiguate this part without 1080193326Sed // making any unnecessary Action calls. 1081193326Sed // 1082193326Sed // It uses a scheme similar to parsing inline methods. The parenthesized 1083193326Sed // tokens are cached, the context that follows is determined (possibly by 1084193326Sed // parsing a cast-expression), and then we re-introduce the cached tokens 1085193326Sed // into the token stream and parse them appropriately. 1086193326Sed 1087193326Sed ParenParseOption ParseAs; 1088193326Sed CachedTokens Toks; 1089193326Sed 1090193326Sed // Store the tokens of the parentheses. We will parse them after we determine 1091193326Sed // the context that follows them. 1092193326Sed if (!ConsumeAndStoreUntil(tok::r_paren, tok::unknown, Toks, tok::semi)) { 1093193326Sed // We didn't find the ')' we expected. 1094193326Sed MatchRHSPunctuation(tok::r_paren, LParenLoc); 1095193326Sed return ExprError(); 1096193326Sed } 1097193326Sed 1098193326Sed if (Tok.is(tok::l_brace)) { 1099193326Sed ParseAs = CompoundLiteral; 1100193326Sed } else { 1101193326Sed bool NotCastExpr; 1102193326Sed // FIXME: Special-case ++ and --: "(S())++;" is not a cast-expression 1103193326Sed if (Tok.is(tok::l_paren) && NextToken().is(tok::r_paren)) { 1104193326Sed NotCastExpr = true; 1105193326Sed } else { 1106193326Sed // Try parsing the cast-expression that may follow. 1107193326Sed // If it is not a cast-expression, NotCastExpr will be true and no token 1108193326Sed // will be consumed. 1109193326Sed Result = ParseCastExpression(false/*isUnaryExpression*/, 1110193326Sed false/*isAddressofOperand*/, 1111193326Sed NotCastExpr); 1112193326Sed } 1113193326Sed 1114193326Sed // If we parsed a cast-expression, it's really a type-id, otherwise it's 1115193326Sed // an expression. 1116193326Sed ParseAs = NotCastExpr ? SimpleExpr : CastExpr; 1117193326Sed } 1118193326Sed 1119193326Sed // The current token should go after the cached tokens. 1120193326Sed Toks.push_back(Tok); 1121193326Sed // Re-enter the stored parenthesized tokens into the token stream, so we may 1122193326Sed // parse them now. 1123193326Sed PP.EnterTokenStream(Toks.data(), Toks.size(), 1124193326Sed true/*DisableMacroExpansion*/, false/*OwnsTokens*/); 1125193326Sed // Drop the current token and bring the first cached one. It's the same token 1126193326Sed // as when we entered this function. 1127193326Sed ConsumeAnyToken(); 1128193326Sed 1129193326Sed if (ParseAs >= CompoundLiteral) { 1130193326Sed TypeResult Ty = ParseTypeName(); 1131193326Sed 1132193326Sed // Match the ')'. 1133193326Sed if (Tok.is(tok::r_paren)) 1134193326Sed RParenLoc = ConsumeParen(); 1135193326Sed else 1136193326Sed MatchRHSPunctuation(tok::r_paren, LParenLoc); 1137193326Sed 1138193326Sed if (ParseAs == CompoundLiteral) { 1139193326Sed ExprType = CompoundLiteral; 1140193326Sed return ParseCompoundLiteralExpression(Ty.get(), LParenLoc, RParenLoc); 1141193326Sed } 1142193326Sed 1143193326Sed // We parsed '(' type-id ')' and the thing after it wasn't a '{'. 1144193326Sed assert(ParseAs == CastExpr); 1145193326Sed 1146193326Sed if (Ty.isInvalid()) 1147193326Sed return ExprError(); 1148193326Sed 1149193326Sed CastTy = Ty.get(); 1150193326Sed 1151193326Sed // Result is what ParseCastExpression returned earlier. 1152193326Sed if (!Result.isInvalid()) 1153193326Sed Result = Actions.ActOnCastExpr(LParenLoc, CastTy, RParenLoc,move(Result)); 1154193326Sed return move(Result); 1155193326Sed } 1156193326Sed 1157193326Sed // Not a compound literal, and not followed by a cast-expression. 1158193326Sed assert(ParseAs == SimpleExpr); 1159193326Sed 1160193326Sed ExprType = SimpleExpr; 1161193326Sed Result = ParseExpression(); 1162193326Sed if (!Result.isInvalid() && Tok.is(tok::r_paren)) 1163193326Sed Result = Actions.ActOnParenExpr(LParenLoc, Tok.getLocation(), move(Result)); 1164193326Sed 1165193326Sed // Match the ')'. 1166193326Sed if (Result.isInvalid()) { 1167193326Sed SkipUntil(tok::r_paren); 1168193326Sed return ExprError(); 1169193326Sed } 1170193326Sed 1171193326Sed if (Tok.is(tok::r_paren)) 1172193326Sed RParenLoc = ConsumeParen(); 1173193326Sed else 1174193326Sed MatchRHSPunctuation(tok::r_paren, LParenLoc); 1175193326Sed 1176193326Sed return move(Result); 1177193326Sed} 1178