ParseTentative.cpp revision 511d7aba3b12853fdb88729a0313b80a60eab8ad
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 32511d7aba3b12853fdb88729a0313b80a60eab8adAnders Carlsson/// [C++0x] static_assert-declaration 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 Kyrtzidisbool Parser::isCXXDeclarationStatement() { 505404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis switch (Tok.getKind()) { 515404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // asm-definition 525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_asm: 535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // namespace-alias-definition 545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_namespace: 555404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // using-declaration 565404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // using-directive 575404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_using: 585404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return true; 59511d7aba3b12853fdb88729a0313b80a60eab8adAnders Carlsson case tok::kw_static_assert: 60511d7aba3b12853fdb88729a0313b80a60eab8adAnders Carlsson // static_assert-declaration 61511d7aba3b12853fdb88729a0313b80a60eab8adAnders Carlsson 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 2738b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// \brief Determine whether the next set of tokens contains a type-id. 2748b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// 2758b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// The context parameter states what context we're parsing right 2768b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// now, which affects how this routine copes with the token 2778b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// following the type-id. If the context is TypeIdInParens, we have 2788b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// already parsed the '(' and we will cease lookahead when we hit 2798b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// the corresponding ')'. If the context is 2808b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// TypeIdAsTemplateArgument, we've already parsed the '<' or ',' 2818b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// before this template argument, and will cease lookahead when we 2828b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// hit a '>', '>>' (in C++0x), or ','. Returns true for a type-id 2838b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// and false for an expression. If during the disambiguation 2848b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// process a parsing error is encountered, the function returns 2858b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// true to let the declaration parsing code handle it. 2868b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// 2878b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// type-id: 2888b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// type-specifier-seq abstract-declarator[opt] 2898b642592a35167a3780074e78674e0bece87c40cDouglas Gregor /// 2908b642592a35167a3780074e78674e0bece87c40cDouglas Gregorbool Parser::isCXXTypeId(TentativeCXXTypeIdContext Context) { 291d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis 292d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // C++ 8.2p2: 293d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // The ambiguity arising from the similarity between a function-style cast and 294d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // a type-id can occur in different contexts. The ambiguity appears as a 295d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // choice between a function-style cast expression and a declaration of a 296d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // type. The resolution is that any construct that could possibly be a type-id 297d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // in its syntactic context shall be considered a type-id. 298d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis 29978c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TPResult TPR = isCXXDeclarationSpecifier(); 30078c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 30178c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis return TPR != TPResult::False(); // Returns true for TPResult::True() or 30278c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // TPResult::Error(). 30378c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 30478c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // FIXME: Add statistics about the number of ambiguous statements encountered 30578c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // and how they were resolved (number of declarations+number of expressions). 30678c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 30778c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // Ok, we have a simple-type-specifier/typename-specifier followed by a '('. 30878c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // We need tentative parsing... 30978c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 31078c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TentativeParsingAction PA(*this); 31178c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 31278c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // type-specifier-seq 31378c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis if (Tok.is(tok::kw_typeof)) 31478c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TryParseTypeofSpecifier(); 31578c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis else 31678c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis ConsumeToken(); 31778c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis assert(Tok.is(tok::l_paren) && "Expected '('"); 31878c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 31978c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // declarator 32078c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TPR = TryParseDeclarator(true/*mayBeAbstract*/, false/*mayHaveIdentifier*/); 32178c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 32278c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // In case of an error, let the declaration parsing code handle it. 32378c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis if (TPR == TPResult::Error()) 32478c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TPR = TPResult::True(); 32578c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 32678c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis if (TPR == TPResult::Ambiguous()) { 32778c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // We are supposed to be inside parens, so if after the abstract declarator 32878c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis // we encounter a ')' this is a type-id, otherwise it's an expression. 3298b642592a35167a3780074e78674e0bece87c40cDouglas Gregor if (Context == TypeIdInParens && Tok.is(tok::r_paren)) 3308b642592a35167a3780074e78674e0bece87c40cDouglas Gregor TPR = TPResult::True(); 3318b642592a35167a3780074e78674e0bece87c40cDouglas Gregor // We are supposed to be inside a template argument, so if after 3328b642592a35167a3780074e78674e0bece87c40cDouglas Gregor // the abstract declarator we encounter a '>', '>>' (in C++0x), or 3338b642592a35167a3780074e78674e0bece87c40cDouglas Gregor // ',', this is a type-id. Otherwise, it's an expression. 3348b642592a35167a3780074e78674e0bece87c40cDouglas Gregor else if (Context == TypeIdAsTemplateArgument && 3358b642592a35167a3780074e78674e0bece87c40cDouglas Gregor (Tok.is(tok::greater) || Tok.is(tok::comma) || 3368b642592a35167a3780074e78674e0bece87c40cDouglas Gregor (getLang().CPlusPlus0x && Tok.is(tok::greatergreater)))) 33778c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TPR = TPResult::True(); 33878c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis else 33978c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TPR = TPResult::False(); 34078c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis } 34178c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 34278c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis PA.Revert(); 34378c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 34478c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis assert(TPR == TPResult::True() || TPR == TPResult::False()); 34578c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis return TPR == TPResult::True(); 34678c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis} 34778c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis 3485404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// declarator: 3495404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-declarator 3505404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// ptr-operator declarator 3515404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-declarator: 3535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// declarator-id 3545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-declarator '(' parameter-declaration-clause ')' 3555404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// cv-qualifier-seq[opt] exception-specification[opt] 3565404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-declarator '[' constant-expression[opt] ']' 3575404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '(' declarator ')' 3581ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis/// [GNU] '(' attributes declarator ')' 3595404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3605404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// abstract-declarator: 3615404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// ptr-operator abstract-declarator[opt] 3625404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-abstract-declarator 3635404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3645404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-abstract-declarator: 3655404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-abstract-declarator[opt] 3665404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '(' parameter-declaration-clause ')' cv-qualifier-seq[opt] 3675404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// exception-specification[opt] 3685404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// direct-abstract-declarator[opt] '[' constant-expression[opt] ']' 3695404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '(' abstract-declarator ')' 3705404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3715404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// ptr-operator: 3725404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '*' cv-qualifier-seq[opt] 3735404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '&' 3745404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [C++0x] '&&' [TODO] 3758edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl/// '::'[opt] nested-name-specifier '*' cv-qualifier-seq[opt] 3765404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3775404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// cv-qualifier-seq: 3785404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// cv-qualifier cv-qualifier-seq[opt] 3795404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3805404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// cv-qualifier: 3815404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'const' 3825404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'volatile' 3835404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3845404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// declarator-id: 3855404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// id-expression 3865404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3875404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// id-expression: 3885404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// unqualified-id 3895404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// qualified-id [TODO] 3905404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 3915404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// unqualified-id: 3925404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// identifier 3935404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// operator-function-id [TODO] 3945404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// conversion-function-id [TODO] 3955404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '~' class-name [TODO] 3965404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// template-id [TODO] 3975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 39878c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios KyrtzidisParser::TPResult Parser::TryParseDeclarator(bool mayBeAbstract, 39978c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis bool mayHaveIdentifier) { 4005404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // declarator: 4015404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-declarator 4025404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // ptr-operator declarator 4035404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 4045404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis while (1) { 4058edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl if (Tok.is(tok::coloncolon) || Tok.is(tok::identifier)) 4068edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl TryAnnotateCXXScopeToken(); 4078edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl 4088edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl if (Tok.is(tok::star) || Tok.is(tok::amp) || 4098edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl (Tok.is(tok::caret) && getLang().Blocks) || 4108edef7c31d27fc9d5d163660702a8a7730a0d19fSebastian Redl (Tok.is(tok::annot_cxxscope) && NextToken().is(tok::star))) { 4115404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // ptr-operator 4125404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 4135404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis while (Tok.is(tok::kw_const) || 4145404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis Tok.is(tok::kw_volatile) || 4155404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis Tok.is(tok::kw_restrict) ) 4165404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 4175404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else { 4185404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis break; 4195404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 4205404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 4215404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 4225404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-declarator: 4235404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-abstract-declarator: 4245404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 42578c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis if (Tok.is(tok::identifier) && mayHaveIdentifier) { 4265404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // declarator-id 4275404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 4285404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else if (Tok.is(tok::l_paren)) { 429d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis ConsumeParen(); 430d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis if (mayBeAbstract && 431d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis (Tok.is(tok::r_paren) || // 'int()' is a function. 432d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis Tok.is(tok::ellipsis) || // 'int(...)' is a function. 433d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis isDeclarationSpecifier())) { // 'int(int)' is a function. 4345404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '(' parameter-declaration-clause ')' cv-qualifier-seq[opt] 4355404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // exception-specification[opt] 436b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = TryParseFunctionDeclarator(); 437b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 4385404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 4395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else { 4405404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '(' declarator ')' 4411ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis // '(' attributes declarator ')' 4425404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '(' abstract-declarator ')' 4431ee2c43bc0c281b60b29f1883e1e206cae28aed6Argyrios Kyrtzidis if (Tok.is(tok::kw___attribute)) 444b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); // attributes indicate declaration 44578c8d80f19cb0bccd4f3d590e71a230e727cfab5Argyrios Kyrtzidis TPResult TPR = TryParseDeclarator(mayBeAbstract, mayHaveIdentifier); 446b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 4475404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 4485404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.isNot(tok::r_paren)) 449b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::False(); 4505404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeParen(); 4515404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 4525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else if (!mayBeAbstract) { 453b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::False(); 4545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 4555404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 4565404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis while (1) { 457b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR(TPResult::Ambiguous()); 4585404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 4595404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::l_paren)) { 460d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis // Check whether we have a function declarator or a possible ctor-style 461d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis // initializer that follows the declarator. Note that ctor-style 462d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis // initializers are not possible in contexts where abstract declarators 463d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis // are allowed. 464e75d849d9141d8e47d05a91b7b5c04194854e47aArgyrios Kyrtzidis if (!mayBeAbstract && !isCXXFunctionDeclarator(false/*warnIfAmbiguous*/)) 465d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis break; 466d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis 4675404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-declarator '(' parameter-declaration-clause ')' 4685404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // cv-qualifier-seq[opt] exception-specification[opt] 469d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis ConsumeParen(); 4705404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TPR = TryParseFunctionDeclarator(); 4715404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else if (Tok.is(tok::l_square)) { 4725404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-declarator '[' constant-expression[opt] ']' 4735404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-abstract-declarator[opt] '[' constant-expression[opt] ']' 4745404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TPR = TryParseBracketDeclarator(); 4755404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } else { 4765404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis break; 4775404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 4785404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 479b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 4805404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 4815404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 4825404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 483b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 4845404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 4855404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 486b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis/// isCXXDeclarationSpecifier - Returns TPResult::True() if it is a declaration 487b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis/// specifier, TPResult::False() if it is not, TPResult::Ambiguous() if it could 488b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis/// be either a decl-specifier or a function-style cast, and TPResult::Error() 489b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis/// if a parsing error was found and reported. 4905404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 4915404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// decl-specifier: 4925404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// storage-class-specifier 4935404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// type-specifier 4945404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// function-specifier 4955404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'friend' 4965404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'typedef' 4975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [GNU] attributes declaration-specifiers[opt] 4985404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 4995404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// storage-class-specifier: 5005404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'register' 5015404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'static' 5025404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'extern' 5035404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'mutable' 5045404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'auto' 5055404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [GNU] '__thread' 5065404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5075404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// function-specifier: 5085404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'inline' 5095404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'virtual' 5105404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'explicit' 5115404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5125404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// typedef-name: 5135404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// identifier 5145404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5155404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// type-specifier: 5165404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// simple-type-specifier 5175404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-specifier 5185404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// enum-specifier 5195404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// elaborated-type-specifier 5205404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// typename-specifier [TODO] 5215404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// cv-qualifier 5225404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5235404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// simple-type-specifier: 5245404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '::'[opt] nested-name-specifier[opt] type-name [TODO] 5255404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '::'[opt] nested-name-specifier 'template' 5265404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// simple-template-id [TODO] 5275404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'char' 5285404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'wchar_t' 5295404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'bool' 5305404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'short' 5315404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'int' 5325404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'long' 5335404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'signed' 5345404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'unsigned' 5355404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'float' 5365404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'double' 5375404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'void' 5385404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [GNU] typeof-specifier 5395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [GNU] '_Complex' 5405404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [C++0x] 'auto' [TODO] 5415404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5425404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// type-name: 5435404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-name 5445404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// enum-name 5455404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// typedef-name 5465404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5475404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// elaborated-type-specifier: 5485404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-key '::'[opt] nested-name-specifier[opt] identifier 5495404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-key '::'[opt] nested-name-specifier[opt] 'template'[opt] 5505404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// simple-template-id 5515404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'enum' '::'[opt] nested-name-specifier[opt] identifier 5525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// enum-name: 5545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// identifier 5555404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5565404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// enum-specifier: 5575404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'enum' identifier[opt] '{' enumerator-list[opt] '}' 5585404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'enum' identifier[opt] '{' enumerator-list ',' '}' 5595404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5605404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-specifier: 5615404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-head '{' member-specification[opt] '}' 5625404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5635404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-head: 5645404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-key identifier[opt] base-clause[opt] 5655404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-key nested-name-specifier identifier base-clause[opt] 5665404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-key nested-name-specifier[opt] simple-template-id 5675404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// base-clause[opt] 5685404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5695404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// class-key: 5705404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'class' 5715404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'struct' 5725404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'union' 5735404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 5745404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// cv-qualifier: 5755404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'const' 5765404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'volatile' 5775404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [GNU] restrict 5785404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 579b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::isCXXDeclarationSpecifier() { 5805404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis switch (Tok.getKind()) { 581e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner case tok::identifier: // foo::bar 582e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner // Annotate typenames and C++ scope specifiers. If we get one, just 583e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner // recurse to handle whatever we get. 584e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner if (TryAnnotateTypeOrScopeToken()) 585e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner return isCXXDeclarationSpecifier(); 586e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner // Otherwise, not a typename. 587e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner return TPResult::False(); 588e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner 589e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner case tok::coloncolon: // ::foo::bar 590e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner if (NextToken().is(tok::kw_new) || // ::new 591e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner NextToken().is(tok::kw_delete)) // ::delete 592e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner return TPResult::False(); 593e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner 594e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner // Annotate typenames and C++ scope specifiers. If we get one, just 595e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner // recurse to handle whatever we get. 596e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner if (TryAnnotateTypeOrScopeToken()) 597e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner return isCXXDeclarationSpecifier(); 598e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner // Otherwise, not a typename. 599e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner return TPResult::False(); 600e584926b8602c26d442f34090dfd5293695f4af5Chris Lattner 6015404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // decl-specifier: 6025404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // storage-class-specifier 6035404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // type-specifier 6045404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // function-specifier 6055404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 'friend' 6065404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 'typedef' 6075404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6085404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_friend: 6095404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_typedef: 6105404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // storage-class-specifier 6115404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_register: 6125404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_static: 6135404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_extern: 6145404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_mutable: 6155404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_auto: 6165404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw___thread: 6175404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // function-specifier 6185404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_inline: 6195404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_virtual: 6205404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_explicit: 6215404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6225404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // type-specifier: 6235404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // simple-type-specifier 6245404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // class-specifier 6255404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // enum-specifier 6265404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // elaborated-type-specifier 6275404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // typename-specifier 6285404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // cv-qualifier 6295404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6305404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // class-specifier 6315404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // elaborated-type-specifier 6325404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_class: 6335404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_struct: 6345404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_union: 6355404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // enum-specifier 6365404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_enum: 6375404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // cv-qualifier 6385404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_const: 6395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_volatile: 6405404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6415404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // GNU 6425404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_restrict: 6435404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw__Complex: 6445404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw___attribute: 645b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); 6467ec5658f92fd5b65f682b6e942b95210426fc6e2Steve Naroff 6477ec5658f92fd5b65f682b6e942b95210426fc6e2Steve Naroff // Microsoft 64847f5209a80c7c75592e87eb296d2b51e03208ae0Steve Naroff case tok::kw___declspec: 6497ec5658f92fd5b65f682b6e942b95210426fc6e2Steve Naroff case tok::kw___cdecl: 6507ec5658f92fd5b65f682b6e942b95210426fc6e2Steve Naroff case tok::kw___stdcall: 6517ec5658f92fd5b65f682b6e942b95210426fc6e2Steve Naroff case tok::kw___fastcall: 6527ec5658f92fd5b65f682b6e942b95210426fc6e2Steve Naroff return PP.getLangOptions().Microsoft ? TPResult::True() : TPResult::False(); 6535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // The ambiguity resides in a simple-type-specifier/typename-specifier 6555404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // followed by a '('. The '(' could either be the start of: 6565404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 6575404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-declarator: 6585404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '(' declarator ')' 6595404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 6605404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // direct-abstract-declarator: 6615404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '(' parameter-declaration-clause ')' cv-qualifier-seq[opt] 6625404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // exception-specification[opt] 6635404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '(' abstract-declarator ')' 6645404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 6655404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // or part of a function-style cast expression: 6665404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 6675404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // simple-type-specifier '(' expression-list[opt] ')' 6685404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 6695404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6705404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // simple-type-specifier: 6715404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6725404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_char: 6735404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_wchar_t: 6745404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_bool: 6755404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_short: 6765404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_int: 6775404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_long: 6785404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_signed: 6795404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_unsigned: 6805404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_float: 6815404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_double: 6825404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_void: 683b31757b68afe06ba442a05775d08fe7aa0f6f889Chris Lattner case tok::annot_typename: 6845404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (NextToken().is(tok::l_paren)) 685b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 6865404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 687b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); 6885404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6895404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // GNU typeof support. 6905404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis case tok::kw_typeof: { 6915404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (NextToken().isNot(tok::l_paren)) 692b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); 6935404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6945404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TentativeParsingAction PA(*this); 6955404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 696b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = TryParseTypeofSpecifier(); 6975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis bool isFollowedByParen = Tok.is(tok::l_paren); 6985404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 6995404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis PA.Revert(); 7005404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 701b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR == TPResult::Error()) 702b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 7035404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7045404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (isFollowedByParen) 705b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 7065404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 707b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); 7085404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 7095404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7105404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis default: 711b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::False(); 7125404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 7135404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 7145404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7155404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// [GNU] typeof-specifier: 7165404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'typeof' '(' expressions ')' 7175404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'typeof' '(' type-name ')' 7185404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 719b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::TryParseTypeofSpecifier() { 7205404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis assert(Tok.is(tok::kw_typeof) && "Expected 'typeof'!"); 7215404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 7225404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7235404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis assert(Tok.is(tok::l_paren) && "Expected '('"); 7245404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Parse through the parens after 'typeof'. 7255404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeParen(); 7265404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (!SkipUntil(tok::r_paren)) 727b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 7285404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 729b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 7305404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 7315404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 732b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::TryParseDeclarationSpecifier() { 733b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = isCXXDeclarationSpecifier(); 734b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 7355404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 7365404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7375404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::kw_typeof)) 7385404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TryParseTypeofSpecifier(); 7395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis else 7405404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 7415404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7425404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis assert(Tok.is(tok::l_paren) && "Expected '('!"); 743b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 7445404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 7455404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7465404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// isCXXFunctionDeclarator - Disambiguates between a function declarator or 7475404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// a constructor-style initializer, when parsing declaration statements. 7485404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// Returns true for function declarator and false for constructor-style 7495404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// initializer. 7505404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// If during the disambiguation process a parsing error is encountered, 7515404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// the function returns true to let the declaration parsing code handle it. 7525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 7535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '(' parameter-declaration-clause ')' cv-qualifier-seq[opt] 7545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// exception-specification[opt] 7555404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 756e75d849d9141d8e47d05a91b7b5c04194854e47aArgyrios Kyrtzidisbool Parser::isCXXFunctionDeclarator(bool warnIfAmbiguous) { 757d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis 758d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // C++ 8.2p1: 759d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // The ambiguity arising from the similarity between a function-style cast and 760d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // a declaration mentioned in 6.8 can also occur in the context of a 761d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // declaration. In that context, the choice is between a function declaration 762d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // with a redundant set of parentheses around a parameter name and an object 763d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // declaration with a function-style cast as the initializer. Just as for the 764d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // ambiguities mentioned in 6.8, the resolution is to consider any construct 765d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis // that could possibly be a declaration a declaration. 766d3dbbb68b1050da2f58d4bea6b23016f451968c9Argyrios Kyrtzidis 7675404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TentativeParsingAction PA(*this); 7685404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7695404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeParen(); 770b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = TryParseParameterDeclarationClause(); 771b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR == TPResult::Ambiguous() && Tok.isNot(tok::r_paren)) 772b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPR = TPResult::False(); 7735404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 774259b0d91f2ff90d8daf39221fe133bf1596c5ffbArgyrios Kyrtzidis SourceLocation TPLoc = Tok.getLocation(); 7755404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis PA.Revert(); 7765404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7775404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // In case of an error, let the declaration parsing code handle it. 778b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR == TPResult::Error()) 7795404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return true; 7805404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 781259b0d91f2ff90d8daf39221fe133bf1596c5ffbArgyrios Kyrtzidis if (TPR == TPResult::Ambiguous()) { 782259b0d91f2ff90d8daf39221fe133bf1596c5ffbArgyrios Kyrtzidis // Function declarator has precedence over constructor-style initializer. 783259b0d91f2ff90d8daf39221fe133bf1596c5ffbArgyrios Kyrtzidis // Emit a warning just in case the author intended a variable definition. 784e75d849d9141d8e47d05a91b7b5c04194854e47aArgyrios Kyrtzidis if (warnIfAmbiguous) 785ef708fd4abccf4d21b1f82ab2ab62f6ae7cc1265Chris Lattner Diag(Tok, diag::warn_parens_disambiguated_as_function_decl) 786ef708fd4abccf4d21b1f82ab2ab62f6ae7cc1265Chris Lattner << SourceRange(Tok.getLocation(), TPLoc); 787b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return true; 788259b0d91f2ff90d8daf39221fe133bf1596c5ffbArgyrios Kyrtzidis } 789b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis 790b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPR == TPResult::True(); 7915404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 7925404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 7935404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration-clause: 7945404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration-list[opt] '...'[opt] 7955404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration-list ',' '...' 7965404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 7975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration-list: 7985404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration 7995404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration-list ',' parameter-declaration 8005404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 8015404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// parameter-declaration: 8025404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// decl-specifier-seq declarator 8035404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// decl-specifier-seq declarator '=' assignment-expression 8045404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// decl-specifier-seq abstract-declarator[opt] 8055404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// decl-specifier-seq abstract-declarator[opt] '=' assignment-expression 8065404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 807b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::TryParseParameterDeclarationClause() { 8085404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8095404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::r_paren)) 810b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); 8115404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8125404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // parameter-declaration-list[opt] '...'[opt] 8135404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // parameter-declaration-list ',' '...' 8145404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 8155404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // parameter-declaration-list: 8165404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // parameter-declaration 8175404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // parameter-declaration-list ',' parameter-declaration 8185404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // 8195404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis while (1) { 8205404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '...'[opt] 8215404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::ellipsis)) { 8225404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 823b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); // '...' is a sign of a function declarator. 8245404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 8255404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8265404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // decl-specifier-seq 827b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis TPResult TPR = TryParseDeclarationSpecifier(); 828b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 8295404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 8305404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8315404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // declarator 8325404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // abstract-declarator[opt] 8335404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis TPR = TryParseDeclarator(true/*mayBeAbstract*/); 834b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis if (TPR != TPResult::Ambiguous()) 8355404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis return TPR; 8365404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8375404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::equal)) { 8385404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // '=' assignment-expression 8395404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Parse through assignment-expression. 8405404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis tok::TokenKind StopToks[3] ={ tok::comma, tok::ellipsis, tok::r_paren }; 8415404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (!SkipUntil(StopToks, 3, true/*StopAtSemi*/, true/*DontConsume*/)) 842b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 8435404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 8445404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8455404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::ellipsis)) { 8465404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 847b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::True(); // '...' is a sign of a function declarator. 8485404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 8495404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8505404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.isNot(tok::comma)) 8515404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis break; 8525404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); // the comma. 8535404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 8545404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 855b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 8565404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 8575404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 858d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis/// TryParseFunctionDeclarator - We parsed a '(' and we want to try to continue 859d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis/// parsing as a function declarator. 860d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis/// If TryParseFunctionDeclarator fully parsed the function declarator, it will 861d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis/// return TPResult::Ambiguous(), otherwise it will return either False() or 862d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis/// Error(). 8635404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 8645404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '(' parameter-declaration-clause ')' cv-qualifier-seq[opt] 8655404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// exception-specification[opt] 8665404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 8675404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// exception-specification: 8685404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 'throw' '(' type-id-list[opt] ')' 8695404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 870b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::TryParseFunctionDeclarator() { 871d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis 872d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis // The '(' is already parsed. 873d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis 874d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis TPResult TPR = TryParseParameterDeclarationClause(); 875d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis if (TPR == TPResult::Ambiguous() && Tok.isNot(tok::r_paren)) 876d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis TPR = TPResult::False(); 877d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis 878d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis if (TPR == TPResult::False() || TPR == TPResult::Error()) 879d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis return TPR; 880d3616a8d0b1506966cb669c19dbfc91bf42c810aArgyrios Kyrtzidis 8815404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Parse through the parens. 8825404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (!SkipUntil(tok::r_paren)) 883b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 8845404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8855404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // cv-qualifier-seq 8865404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis while (Tok.is(tok::kw_const) || 8875404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis Tok.is(tok::kw_volatile) || 8885404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis Tok.is(tok::kw_restrict) ) 8895404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 8905404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8915404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // exception-specification 8925404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.is(tok::kw_throw)) { 8935404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeToken(); 8945404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (Tok.isNot(tok::l_paren)) 895b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 8965404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 8975404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis // Parse through the parens after 'throw'. 8985404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeParen(); 8995404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (!SkipUntil(tok::r_paren)) 900b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 9015404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis } 9025404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 903b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 9045404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 9055404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 9065404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// '[' constant-expression[opt] ']' 9075404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis/// 908b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios KyrtzidisParser::TPResult Parser::TryParseBracketDeclarator() { 9095404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis ConsumeBracket(); 9105404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis if (!SkipUntil(tok::r_square)) 911b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Error(); 9125404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis 913b9f341916e484ff6ba2c2d28c8b2dd5fa12b0015Argyrios Kyrtzidis return TPResult::Ambiguous(); 9145404a156be26de1c63ca9916187f970848bb4dbbArgyrios Kyrtzidis} 915