ParseTentative.cpp revision 500d3297d2a21edeac4d46cbcbe21bc2352c2a28
15404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis//===--- ParseTentative.cpp - Ambiguity Resolution Parsing ----------------===// 25404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis// 35404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis// The LLVM Compiler Infrastructure 45404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis// 55404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis// This file is distributed under the University of Illinois Open Source 65404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis// License. See LICENSE.TXT for details. 75404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis// 85404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis//===----------------------------------------------------------------------===// 95404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis// 105404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis// This file implements the tentative parsing portions of the Parser 115404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis// interfaces, for ambiguity resolution. 125404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis// 135404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis//===----------------------------------------------------------------------===// 145404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 155404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis#include "clang/Parse/Parser.h" 16500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/Parse/ParseDiagnostic.h" 175404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidisusing namespace clang; 185404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 195404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// isCXXDeclarationStatement - C++-specialized function that disambiguates 205404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// between a declaration or an expression statement, when parsing function 215404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// bodies. Returns true for declaration, false for expression. 225404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 235404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// declaration-statement: 245404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// block-declaration 255404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 265404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// block-declaration: 275404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// simple-declaration 285404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// asm-definition 295404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// namespace-alias-definition 305404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// using-declaration 315404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// using-directive 325404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [C++0x] static_assert-declaration [TODO] 335404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 345404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// asm-definition: 355404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'asm' '(' string-literal ')' ';' 365404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 375404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// namespace-alias-definition: 385404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'namespace' identifier = qualified-namespace-specifier ';' 395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 405404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// using-declaration: 415404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'using' typename[opt] '::'[opt] nested-name-specifier 425404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// unqualified-id ';' 435404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'using' '::' unqualified-id ; 445404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 455404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// using-directive: 465404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'using' 'namespace' '::'[opt] nested-name-specifier[opt] 475404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// namespace-name ';' 485404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 495404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [C++0x] static_assert-declaration: [TODO] 505404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [C++0x] static_assert '(' constant-expression ',' string-literal ')' ';' 515404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidisbool Parser::isCXXDeclarationStatement() { 535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis switch (Tok.getKind()) { 545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // asm-definition 555404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_asm: 565404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // namespace-alias-definition 575404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_namespace: 585404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // using-declaration 595404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // using-directive 605404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_using: 615404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return true; 625404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis default: 635404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // simple-declaration 645404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return isCXXSimpleDeclaration(); 655404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 665404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 675404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 685404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// isCXXSimpleDeclaration - C++-specialized function that disambiguates 695404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// between a simple-declaration or an expression-statement. 705404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// If during the disambiguation process a parsing error is encountered, 715404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// the function returns true to let the declaration parsing code handle it. 725404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// Returns false if the statement is disambiguated as expression. 735404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 745404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// simple-declaration: 755404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// decl-specifier-seq init-declarator-list[opt] ';' 765404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 775404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidisbool Parser::isCXXSimpleDeclaration() { 785404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // C++ 6.8p1: 795404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // There is an ambiguity in the grammar involving expression-statements and 805404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // declarations: An expression-statement with a function-style explicit type 815404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // conversion (5.2.3) as its leftmost subexpression can be indistinguishable 825404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // from a declaration where the first declarator starts with a '('. In those 835404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // cases the statement is a declaration. [Note: To disambiguate, the whole 845404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // statement might have to be examined to determine if it is an 855404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // expression-statement or a declaration]. 865404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 875404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // C++ 6.8p3: 885404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // The disambiguation is purely syntactic; that is, the meaning of the names 895404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // occurring in such a statement, beyond whether they are type-names or not, 905404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // is not generally used in or changed by the disambiguation. Class 915404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // templates are instantiated as necessary to determine if a qualified name 925404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // is a type-name. Disambiguation precedes parsing, and a statement 935404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // disambiguated as a declaration may be an ill-formed declaration. 945404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 955404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // We don't have to parse all of the decl-specifier-seq part. There's only 965404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // an ambiguity if the first decl-specifier is 975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // simple-type-specifier/typename-specifier followed by a '(', which may 985404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // indicate a function-style cast expression. 99b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis // isCXXDeclarationSpecifier will return TPResult::Ambiguous() only in such 100b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis // a case. 1015404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 102b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = isCXXDeclarationSpecifier(); 103b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 104b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPR != TPResult::False(); // Returns true for TPResult::True() or 105b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis // TPResult::Error(). 1065404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1075404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // FIXME: Add statistics about the number of ambiguous statements encountered 1085404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // and how they were resolved (number of declarations+number of expressions). 1095404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1105404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Ok, we have a simple-type-specifier/typename-specifier followed by a '('. 1115404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // We need tentative parsing... 1125404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1135404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TentativeParsingAction PA(*this); 1145404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1155404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TPR = TryParseSimpleDeclaration(); 1165404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis SourceLocation TentativeParseLoc = Tok.getLocation(); 1175404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1185404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis PA.Revert(); 1195404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1205404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // In case of an error, let the declaration parsing code handle it. 121b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR == TPResult::Error()) 1225404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return true; 1235404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1245404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Declarations take precedence over expressions. 125b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR == TPResult::Ambiguous()) 126b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPR = TPResult::True(); 1275404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 128b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis assert(TPR == TPResult::True() || TPR == TPResult::False()); 129b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPR == TPResult::True(); 1305404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 1315404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1325404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// simple-declaration: 1335404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// decl-specifier-seq init-declarator-list[opt] ';' 1345404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 135b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::TryParseSimpleDeclaration() { 1365404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // We know that we have a simple-type-specifier/typename-specifier followed 1375404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // by a '('. 138b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis assert(isCXXDeclarationSpecifier() == TPResult::Ambiguous()); 1395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1405404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::kw_typeof)) 1415404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TryParseTypeofSpecifier(); 1425404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis else 1435404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 1445404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1455404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis assert(Tok.is(tok::l_paren) && "Expected '('"); 1465404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 147b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = TryParseInitDeclaratorList(); 148b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 1495404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 1505404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1515404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.isNot(tok::semi)) 152b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::False(); 1535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 154b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 1555404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 1565404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1571ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis/// init-declarator-list: 1581ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis/// init-declarator 1591ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis/// init-declarator-list ',' init-declarator 1605404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 1611ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis/// init-declarator: 1621ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis/// declarator initializer[opt] 1631ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis/// [GNU] declarator simple-asm-expr[opt] attributes[opt] initializer[opt] 1645404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 1655404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// initializer: 1665404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '=' initializer-clause 1675404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '(' expression-list ')' 1685404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 1695404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// initializer-clause: 1705404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// assignment-expression 1715404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '{' initializer-list ','[opt] '}' 1725404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '{' '}' 1735404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 174b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::TryParseInitDeclaratorList() { 1755404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // GCC only examines the first declarator for disambiguation: 1765404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // i.e: 1775404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // int(x), ++x; // GCC regards it as ill-formed declaration. 1785404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 1795404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Comeau and MSVC will regard the above statement as correct expression. 1805404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Clang examines all of the declarators and also regards the above statement 1815404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // as correct expression. 1825404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1835404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis while (1) { 1845404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // declarator 185b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = TryParseDeclarator(false/*mayBeAbstract*/); 186b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 1875404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 1885404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 1891ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis // [GNU] simple-asm-expr[opt] attributes[opt] 1901ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis if (Tok.is(tok::kw_asm) || Tok.is(tok::kw___attribute)) 191b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); 1921ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis 1935404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // initializer[opt] 1945404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::l_paren)) { 1955404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Parse through the parens. 1965404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeParen(); 1975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (!SkipUntil(tok::r_paren)) 198b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 1995404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else if (Tok.is(tok::equal)) { 2005404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // MSVC won't examine the rest of declarators if '=' is encountered, it 2015404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // will conclude that it is a declaration. 2025404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Comeau and Clang will examine the rest of declarators. 2035404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Note that "int(x) = {0}, ++x;" will be interpreted as ill-formed 2045404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // expression. 2055404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 2065404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Parse through the initializer-clause. 2075404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis SkipUntil(tok::comma, true/*StopAtSemi*/, true/*DontConsume*/); 2085404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 2095404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 2105404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.isNot(tok::comma)) 2115404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis break; 2125404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); // the comma. 2135404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 2145404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 215b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 2165404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 2175404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 218a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis/// isCXXConditionDeclaration - Disambiguates between a declaration or an 219a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis/// expression for a condition of a if/switch/while/for statement. 220a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis/// If during the disambiguation process a parsing error is encountered, 221a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis/// the function returns true to let the declaration parsing code handle it. 222a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis/// 223a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis/// condition: 224a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis/// expression 225a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis/// type-specifier-seq declarator '=' assignment-expression 226a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis/// [GNU] type-specifier-seq declarator simple-asm-expr[opt] attributes[opt] 227a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis/// '=' assignment-expression 228a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis/// 229a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidisbool Parser::isCXXConditionDeclaration() { 230b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = isCXXDeclarationSpecifier(); 231b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 232b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPR != TPResult::False(); // Returns true for TPResult::True() or 233b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis // TPResult::Error(). 234a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis 235a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis // FIXME: Add statistics about the number of ambiguous statements encountered 236a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis // and how they were resolved (number of declarations+number of expressions). 237a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis 238a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis // Ok, we have a simple-type-specifier/typename-specifier followed by a '('. 239a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis // We need tentative parsing... 240a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis 241a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis TentativeParsingAction PA(*this); 242a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis 243a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis // type-specifier-seq 244a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis if (Tok.is(tok::kw_typeof)) 245a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis TryParseTypeofSpecifier(); 246a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis else 247a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis ConsumeToken(); 248a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis assert(Tok.is(tok::l_paren) && "Expected '('"); 249a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis 250a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis // declarator 251a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis TPR = TryParseDeclarator(false/*mayBeAbstract*/); 252a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis 253a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis // In case of an error, let the declaration parsing code handle it. 254b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR == TPResult::Error()) 255b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPR = TPResult::True(); 256a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis 257b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR == TPResult::Ambiguous()) { 258a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis // '=' 259a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis // [GNU] simple-asm-expr[opt] attributes[opt] 260a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis if (Tok.is(tok::equal) || 261a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis Tok.is(tok::kw_asm) || Tok.is(tok::kw___attribute)) 262b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPR = TPResult::True(); 263a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis else 264b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPR = TPResult::False(); 265a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis } 266a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis 267ca35baa788ccba7a213365b9d64d6b2f7bdb9afeArgyrios Kyrtzidis PA.Revert(); 268ca35baa788ccba7a213365b9d64d6b2f7bdb9afeArgyrios Kyrtzidis 269b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis assert(TPR == TPResult::True() || TPR == TPResult::False()); 270b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPR == TPResult::True(); 271a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis} 272a8a4598b6f2a07339ab8a1248295a07d771a2b2aArgyrios Kyrtzidis 273d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis/// isCXXTypeIdInParens - Assumes that a '(' was parsed and now we want to 274d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis/// know whether the parens contain an expression or a type-id. 275d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis/// Returns true for a type-id and false for an expression. 276d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis/// If during the disambiguation process a parsing error is encountered, 277d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis/// the function returns true to let the declaration parsing code handle it. 278d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis/// 279d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis/// type-id: 28078c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis/// type-specifier-seq abstract-declarator[opt] 28178c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis/// 28278c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidisbool Parser::isCXXTypeIdInParens() { 283d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis 284d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // C++ 8.2p2: 285d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // The ambiguity arising from the similarity between a function-style cast and 286d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // a type-id can occur in different contexts. The ambiguity appears as a 287d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // choice between a function-style cast expression and a declaration of a 288d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // type. The resolution is that any construct that could possibly be a type-id 289d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // in its syntactic context shall be considered a type-id. 290d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis 29178c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TPResult TPR = isCXXDeclarationSpecifier(); 29278c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 29378c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis return TPR != TPResult::False(); // Returns true for TPResult::True() or 29478c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // TPResult::Error(). 29578c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 29678c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // FIXME: Add statistics about the number of ambiguous statements encountered 29778c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // and how they were resolved (number of declarations+number of expressions). 29878c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 29978c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // Ok, we have a simple-type-specifier/typename-specifier followed by a '('. 30078c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // We need tentative parsing... 30178c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 30278c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TentativeParsingAction PA(*this); 30378c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 30478c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // type-specifier-seq 30578c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis if (Tok.is(tok::kw_typeof)) 30678c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TryParseTypeofSpecifier(); 30778c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis else 30878c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis ConsumeToken(); 30978c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis assert(Tok.is(tok::l_paren) && "Expected '('"); 31078c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 31178c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // declarator 31278c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TPR = TryParseDeclarator(true/*mayBeAbstract*/, false/*mayHaveIdentifier*/); 31378c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 31478c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // In case of an error, let the declaration parsing code handle it. 31578c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis if (TPR == TPResult::Error()) 31678c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TPR = TPResult::True(); 31778c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 31878c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis if (TPR == TPResult::Ambiguous()) { 31978c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // We are supposed to be inside parens, so if after the abstract declarator 32078c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // we encounter a ')' this is a type-id, otherwise it's an expression. 32178c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis if (Tok.is(tok::r_paren)) 32278c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TPR = TPResult::True(); 32378c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis else 32478c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TPR = TPResult::False(); 32578c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis } 32678c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 32778c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis PA.Revert(); 32878c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 32978c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis assert(TPR == TPResult::True() || TPR == TPResult::False()); 33078c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis return TPR == TPResult::True(); 33178c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis} 33278c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 3335404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// declarator: 3345404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-declarator 3355404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// ptr-operator declarator 3365404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3375404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-declarator: 3385404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// declarator-id 3395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-declarator '(' parameter-declaration-clause ')' 3405404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// cv-qualifier-seq[opt] exception-specification[opt] 3415404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-declarator '[' constant-expression[opt] ']' 3425404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '(' declarator ')' 3431ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis/// [GNU] '(' attributes declarator ')' 3445404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3455404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// abstract-declarator: 3465404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// ptr-operator abstract-declarator[opt] 3475404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-abstract-declarator 3485404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3495404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-abstract-declarator: 3505404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-abstract-declarator[opt] 3515404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '(' parameter-declaration-clause ')' cv-qualifier-seq[opt] 3525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// exception-specification[opt] 3535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-abstract-declarator[opt] '[' constant-expression[opt] ']' 3545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '(' abstract-declarator ')' 3555404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3565404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// ptr-operator: 3575404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '*' cv-qualifier-seq[opt] 3585404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '&' 3595404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [C++0x] '&&' [TODO] 3608edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl/// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt] 3615404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3625404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// cv-qualifier-seq: 3635404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// cv-qualifier cv-qualifier-seq[opt] 3645404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3655404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// cv-qualifier: 3665404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'const' 3675404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'volatile' 3685404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3695404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// declarator-id: 3705404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// id-expression 3715404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3725404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// id-expression: 3735404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// unqualified-id 3745404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// qualified-id [TODO] 3755404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3765404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// unqualified-id: 3775404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// identifier 3785404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// operator-function-id [TODO] 3795404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// conversion-function-id [TODO] 3805404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '~' class-name [TODO] 3815404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// template-id [TODO] 3825404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 38378c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios KyrtzidisParser::TPResult Parser::TryParseDeclarator(bool mayBeAbstract, 38478c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis bool mayHaveIdentifier) { 3855404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // declarator: 3865404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-declarator 3875404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // ptr-operator declarator 3885404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 3895404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis while (1) { 3908edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl if (Tok.is(tok::coloncolon) || Tok.is(tok::identifier)) 3918edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl TryAnnotateCXXScopeToken(); 3928edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl 3938edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl if (Tok.is(tok::star) || Tok.is(tok::amp) || 3948edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl (Tok.is(tok::caret) && getLang().Blocks) || 3958edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl (Tok.is(tok::annot_cxxscope) && NextToken().is(tok::star))) { 3965404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // ptr-operator 3975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 3985404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis while (Tok.is(tok::kw_const) || 3995404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis Tok.is(tok::kw_volatile) || 4005404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis Tok.is(tok::kw_restrict) ) 4015404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 4025404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else { 4035404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis break; 4045404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 4055404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 4065404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 4075404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-declarator: 4085404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-abstract-declarator: 4095404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 41078c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis if (Tok.is(tok::identifier) && mayHaveIdentifier) { 4115404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // declarator-id 4125404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 4135404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else if (Tok.is(tok::l_paren)) { 414d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis ConsumeParen(); 415d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis if (mayBeAbstract && 416d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis (Tok.is(tok::r_paren) || // 'int()' is a function. 417d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis Tok.is(tok::ellipsis) || // 'int(...)' is a function. 418d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis isDeclarationSpecifier())) { // 'int(int)' is a function. 4195404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '(' parameter-declaration-clause ')' cv-qualifier-seq[opt] 4205404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // exception-specification[opt] 421b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = TryParseFunctionDeclarator(); 422b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 4235404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 4245404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else { 4255404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '(' declarator ')' 4261ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis // '(' attributes declarator ')' 4275404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '(' abstract-declarator ')' 4281ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis if (Tok.is(tok::kw___attribute)) 429b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); // attributes indicate declaration 43078c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TPResult TPR = TryParseDeclarator(mayBeAbstract, mayHaveIdentifier); 431b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 4325404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 4335404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.isNot(tok::r_paren)) 434b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::False(); 4355404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeParen(); 4365404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 4375404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else if (!mayBeAbstract) { 438b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::False(); 4395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 4405404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 4415404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis while (1) { 442b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR(TPResult::Ambiguous()); 4435404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 4445404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::l_paren)) { 445d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis // Check whether we have a function declarator or a possible ctor-style 446d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis // initializer that follows the declarator. Note that ctor-style 447d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis // initializers are not possible in contexts where abstract declarators 448d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis // are allowed. 449e75d849d9141d8e47d05a91b7b5c04194854e47aArgyrios Kyrtzidis if (!mayBeAbstract && !isCXXFunctionDeclarator(false/*warnIfAmbiguous*/)) 450d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis break; 451d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis 4525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-declarator '(' parameter-declaration-clause ')' 4535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // cv-qualifier-seq[opt] exception-specification[opt] 454d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis ConsumeParen(); 4555404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TPR = TryParseFunctionDeclarator(); 4565404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else if (Tok.is(tok::l_square)) { 4575404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-declarator '[' constant-expression[opt] ']' 4585404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-abstract-declarator[opt] '[' constant-expression[opt] ']' 4595404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TPR = TryParseBracketDeclarator(); 4605404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else { 4615404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis break; 4625404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 4635404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 464b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 4655404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 4665404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 4675404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 468b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 4695404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 4705404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 471b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis/// isCXXDeclarationSpecifier - Returns TPResult::True() if it is a declaration 472b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis/// specifier, TPResult::False() if it is not, TPResult::Ambiguous() if it could 473b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis/// be either a decl-specifier or a function-style cast, and TPResult::Error() 474b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis/// if a parsing error was found and reported. 4755404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 4765404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// decl-specifier: 4775404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// storage-class-specifier 4785404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// type-specifier 4795404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// function-specifier 4805404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'friend' 4815404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'typedef' 4825404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [GNU] attributes declaration-specifiers[opt] 4835404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 4845404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// storage-class-specifier: 4855404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'register' 4865404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'static' 4875404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'extern' 4885404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'mutable' 4895404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'auto' 4905404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [GNU] '__thread' 4915404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 4925404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// function-specifier: 4935404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'inline' 4945404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'virtual' 4955404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'explicit' 4965404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 4975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// typedef-name: 4985404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// identifier 4995404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5005404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// type-specifier: 5015404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// simple-type-specifier 5025404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-specifier 5035404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// enum-specifier 5045404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// elaborated-type-specifier 5055404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// typename-specifier [TODO] 5065404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// cv-qualifier 5075404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5085404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// simple-type-specifier: 5095404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '::'[opt] nested-name-specifier[opt] type-name [TODO] 5105404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '::'[opt] nested-name-specifier 'template' 5115404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// simple-template-id [TODO] 5125404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'char' 5135404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'wchar_t' 5145404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'bool' 5155404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'short' 5165404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'int' 5175404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'long' 5185404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'signed' 5195404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'unsigned' 5205404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'float' 5215404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'double' 5225404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'void' 5235404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [GNU] typeof-specifier 5245404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [GNU] '_Complex' 5255404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [C++0x] 'auto' [TODO] 5265404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5275404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// type-name: 5285404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-name 5295404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// enum-name 5305404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// typedef-name 5315404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5325404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// elaborated-type-specifier: 5335404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-key '::'[opt] nested-name-specifier[opt] identifier 5345404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-key '::'[opt] nested-name-specifier[opt] 'template'[opt] 5355404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// simple-template-id 5365404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'enum' '::'[opt] nested-name-specifier[opt] identifier 5375404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5385404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// enum-name: 5395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// identifier 5405404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5415404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// enum-specifier: 5425404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'enum' identifier[opt] '{' enumerator-list[opt] '}' 5435404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'enum' identifier[opt] '{' enumerator-list ',' '}' 5445404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5455404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-specifier: 5465404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-head '{' member-specification[opt] '}' 5475404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5485404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-head: 5495404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-key identifier[opt] base-clause[opt] 5505404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-key nested-name-specifier identifier base-clause[opt] 5515404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-key nested-name-specifier[opt] simple-template-id 5525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// base-clause[opt] 5535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-key: 5555404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'class' 5565404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'struct' 5575404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'union' 5585404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5595404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// cv-qualifier: 5605404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'const' 5615404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'volatile' 5625404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [GNU] restrict 5635404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 564b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::isCXXDeclarationSpecifier() { 5655404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis switch (Tok.getKind()) { 566e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner case tok::identifier: // foo::bar 567e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner // Annotate typenames and C++ scope specifiers. If we get one, just 568e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner // recurse to handle whatever we get. 569e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner if (TryAnnotateTypeOrScopeToken()) 570e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner return isCXXDeclarationSpecifier(); 571e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner // Otherwise, not a typename. 572e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner return TPResult::False(); 573e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner 574e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner case tok::coloncolon: // ::foo::bar 575e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner if (NextToken().is(tok::kw_new) || // ::new 576e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner NextToken().is(tok::kw_delete)) // ::delete 577e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner return TPResult::False(); 578e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner 579e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner // Annotate typenames and C++ scope specifiers. If we get one, just 580e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner // recurse to handle whatever we get. 581e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner if (TryAnnotateTypeOrScopeToken()) 582e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner return isCXXDeclarationSpecifier(); 583e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner // Otherwise, not a typename. 584e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner return TPResult::False(); 585e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner 5865404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // decl-specifier: 5875404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // storage-class-specifier 5885404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // type-specifier 5895404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // function-specifier 5905404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 'friend' 5915404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 'typedef' 5925404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 5935404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_friend: 5945404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_typedef: 5955404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // storage-class-specifier 5965404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_register: 5975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_static: 5985404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_extern: 5995404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_mutable: 6005404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_auto: 6015404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw___thread: 6025404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // function-specifier 6035404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_inline: 6045404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_virtual: 6055404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_explicit: 6065404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6075404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // type-specifier: 6085404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // simple-type-specifier 6095404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // class-specifier 6105404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // enum-specifier 6115404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // elaborated-type-specifier 6125404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // typename-specifier 6135404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // cv-qualifier 6145404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6155404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // class-specifier 6165404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // elaborated-type-specifier 6175404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_class: 6185404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_struct: 6195404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_union: 6205404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // enum-specifier 6215404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_enum: 6225404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // cv-qualifier 6235404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_const: 6245404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_volatile: 6255404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6265404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // GNU 6275404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_restrict: 6285404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw__Complex: 6295404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw___attribute: 630b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); 6317ec5658f92fd5b65f682b6e942b95210426fc6e2Steve Naroff 6327ec5658f92fd5b65f682b6e942b95210426fc6e2Steve Naroff // Microsoft 63347f5209a80c7c75592e87eb296d2b51e03208ae0Steve Naroff case tok::kw___declspec: 6347ec5658f92fd5b65f682b6e942b95210426fc6e2Steve Naroff case tok::kw___cdecl: 6357ec5658f92fd5b65f682b6e942b95210426fc6e2Steve Naroff case tok::kw___stdcall: 6367ec5658f92fd5b65f682b6e942b95210426fc6e2Steve Naroff case tok::kw___fastcall: 6377ec5658f92fd5b65f682b6e942b95210426fc6e2Steve Naroff return PP.getLangOptions().Microsoft ? TPResult::True() : TPResult::False(); 6385404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // The ambiguity resides in a simple-type-specifier/typename-specifier 6405404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // followed by a '('. The '(' could either be the start of: 6415404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 6425404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-declarator: 6435404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '(' declarator ')' 6445404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 6455404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-abstract-declarator: 6465404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '(' parameter-declaration-clause ')' cv-qualifier-seq[opt] 6475404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // exception-specification[opt] 6485404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '(' abstract-declarator ')' 6495404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 6505404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // or part of a function-style cast expression: 6515404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 6525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // simple-type-specifier '(' expression-list[opt] ')' 6535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 6545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6555404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // simple-type-specifier: 6565404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6575404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_char: 6585404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_wchar_t: 6595404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_bool: 6605404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_short: 6615404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_int: 6625404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_long: 6635404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_signed: 6645404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_unsigned: 6655404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_float: 6665404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_double: 6675404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_void: 668b31757b68afe06ba442a05775d08fe7aa0f6f889Chris Lattner case tok::annot_typename: 6695404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (NextToken().is(tok::l_paren)) 670b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 6715404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 672b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); 6735404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6745404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // GNU typeof support. 6755404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_typeof: { 6765404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (NextToken().isNot(tok::l_paren)) 677b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); 6785404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6795404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TentativeParsingAction PA(*this); 6805404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 681b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = TryParseTypeofSpecifier(); 6825404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis bool isFollowedByParen = Tok.is(tok::l_paren); 6835404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6845404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis PA.Revert(); 6855404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 686b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR == TPResult::Error()) 687b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 6885404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6895404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (isFollowedByParen) 690b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 6915404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 692b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); 6935404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 6945404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6955404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis default: 696b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::False(); 6975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 6985404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 6995404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7005404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [GNU] typeof-specifier: 7015404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'typeof' '(' expressions ')' 7025404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'typeof' '(' type-name ')' 7035404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 704b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::TryParseTypeofSpecifier() { 7055404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis assert(Tok.is(tok::kw_typeof) && "Expected 'typeof'!"); 7065404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 7075404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7085404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis assert(Tok.is(tok::l_paren) && "Expected '('"); 7095404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Parse through the parens after 'typeof'. 7105404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeParen(); 7115404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (!SkipUntil(tok::r_paren)) 712b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 7135404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 714b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 7155404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 7165404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 717b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::TryParseDeclarationSpecifier() { 718b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = isCXXDeclarationSpecifier(); 719b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 7205404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 7215404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7225404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::kw_typeof)) 7235404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TryParseTypeofSpecifier(); 7245404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis else 7255404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 7265404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7275404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis assert(Tok.is(tok::l_paren) && "Expected '('!"); 728b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 7295404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 7305404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7315404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// isCXXFunctionDeclarator - Disambiguates between a function declarator or 7325404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// a constructor-style initializer, when parsing declaration statements. 7335404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// Returns true for function declarator and false for constructor-style 7345404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// initializer. 7355404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// If during the disambiguation process a parsing error is encountered, 7365404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// the function returns true to let the declaration parsing code handle it. 7375404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 7385404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '(' parameter-declaration-clause ')' cv-qualifier-seq[opt] 7395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// exception-specification[opt] 7405404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 741e75d849d9141d8e47d05a91b7b5c04194854e47aArgyrios Kyrtzidisbool Parser::isCXXFunctionDeclarator(bool warnIfAmbiguous) { 742d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis 743d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // C++ 8.2p1: 744d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // The ambiguity arising from the similarity between a function-style cast and 745d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // a declaration mentioned in 6.8 can also occur in the context of a 746d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // declaration. In that context, the choice is between a function declaration 747d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // with a redundant set of parentheses around a parameter name and an object 748d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // declaration with a function-style cast as the initializer. Just as for the 749d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // ambiguities mentioned in 6.8, the resolution is to consider any construct 750d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // that could possibly be a declaration a declaration. 751d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis 7525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TentativeParsingAction PA(*this); 7535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeParen(); 755b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = TryParseParameterDeclarationClause(); 756b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR == TPResult::Ambiguous() && Tok.isNot(tok::r_paren)) 757b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPR = TPResult::False(); 7585404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 759259b0d91f2ff90d8daf39221fe133bf1596c5ffbArgyrios Kyrtzidis SourceLocation TPLoc = Tok.getLocation(); 7605404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis PA.Revert(); 7615404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7625404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // In case of an error, let the declaration parsing code handle it. 763b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR == TPResult::Error()) 7645404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return true; 7655404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 766259b0d91f2ff90d8daf39221fe133bf1596c5ffbArgyrios Kyrtzidis if (TPR == TPResult::Ambiguous()) { 767259b0d91f2ff90d8daf39221fe133bf1596c5ffbArgyrios Kyrtzidis // Function declarator has precedence over constructor-style initializer. 768259b0d91f2ff90d8daf39221fe133bf1596c5ffbArgyrios Kyrtzidis // Emit a warning just in case the author intended a variable definition. 769e75d849d9141d8e47d05a91b7b5c04194854e47aArgyrios Kyrtzidis if (warnIfAmbiguous) 770ef708fd4abccf4d21b1f82ab2ab62f6ae7cc1265Chris Lattner Diag(Tok, diag::warn_parens_disambiguated_as_function_decl) 771ef708fd4abccf4d21b1f82ab2ab62f6ae7cc1265Chris Lattner << SourceRange(Tok.getLocation(), TPLoc); 772b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return true; 773259b0d91f2ff90d8daf39221fe133bf1596c5ffbArgyrios Kyrtzidis } 774b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis 775b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPR == TPResult::True(); 7765404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 7775404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7785404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration-clause: 7795404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration-list[opt] '...'[opt] 7805404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration-list ',' '...' 7815404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 7825404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration-list: 7835404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration 7845404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration-list ',' parameter-declaration 7855404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 7865404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration: 7875404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// decl-specifier-seq declarator 7885404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// decl-specifier-seq declarator '=' assignment-expression 7895404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// decl-specifier-seq abstract-declarator[opt] 7905404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// decl-specifier-seq abstract-declarator[opt] '=' assignment-expression 7915404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 792b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::TryParseParameterDeclarationClause() { 7935404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7945404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::r_paren)) 795b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); 7965404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // parameter-declaration-list[opt] '...'[opt] 7985404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // parameter-declaration-list ',' '...' 7995404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 8005404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // parameter-declaration-list: 8015404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // parameter-declaration 8025404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // parameter-declaration-list ',' parameter-declaration 8035404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 8045404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis while (1) { 8055404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '...'[opt] 8065404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::ellipsis)) { 8075404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 808b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); // '...' is a sign of a function declarator. 8095404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 8105404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8115404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // decl-specifier-seq 812b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = TryParseDeclarationSpecifier(); 813b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 8145404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 8155404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8165404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // declarator 8175404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // abstract-declarator[opt] 8185404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TPR = TryParseDeclarator(true/*mayBeAbstract*/); 819b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 8205404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 8215404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8225404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::equal)) { 8235404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '=' assignment-expression 8245404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Parse through assignment-expression. 8255404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis tok::TokenKind StopToks[3] ={ tok::comma, tok::ellipsis, tok::r_paren }; 8265404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (!SkipUntil(StopToks, 3, true/*StopAtSemi*/, true/*DontConsume*/)) 827b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 8285404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 8295404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8305404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::ellipsis)) { 8315404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 832b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); // '...' is a sign of a function declarator. 8335404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 8345404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8355404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.isNot(tok::comma)) 8365404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis break; 8375404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); // the comma. 8385404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 8395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 840b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 8415404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 8425404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 843d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis/// TryParseFunctionDeclarator - We parsed a '(' and we want to try to continue 844d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis/// parsing as a function declarator. 845d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis/// If TryParseFunctionDeclarator fully parsed the function declarator, it will 846d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis/// return TPResult::Ambiguous(), otherwise it will return either False() or 847d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis/// Error(). 8485404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 8495404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '(' parameter-declaration-clause ')' cv-qualifier-seq[opt] 8505404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// exception-specification[opt] 8515404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 8525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// exception-specification: 8535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'throw' '(' type-id-list[opt] ')' 8545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 855b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::TryParseFunctionDeclarator() { 856d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis 857d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis // The '(' is already parsed. 858d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis 859d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis TPResult TPR = TryParseParameterDeclarationClause(); 860d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis if (TPR == TPResult::Ambiguous() && Tok.isNot(tok::r_paren)) 861d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis TPR = TPResult::False(); 862d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis 863d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis if (TPR == TPResult::False() || TPR == TPResult::Error()) 864d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis return TPR; 865d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis 8665404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Parse through the parens. 8675404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (!SkipUntil(tok::r_paren)) 868b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 8695404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8705404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // cv-qualifier-seq 8715404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis while (Tok.is(tok::kw_const) || 8725404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis Tok.is(tok::kw_volatile) || 8735404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis Tok.is(tok::kw_restrict) ) 8745404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 8755404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8765404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // exception-specification 8775404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::kw_throw)) { 8785404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 8795404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.isNot(tok::l_paren)) 880b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 8815404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8825404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Parse through the parens after 'throw'. 8835404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeParen(); 8845404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (!SkipUntil(tok::r_paren)) 885b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 8865404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 8875404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 888b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 8895404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 8905404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8915404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '[' constant-expression[opt] ']' 8925404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 893b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::TryParseBracketDeclarator() { 8945404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeBracket(); 8955404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (!SkipUntil(tok::r_square)) 896b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 8975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 898b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 8995404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 900