Parser.cpp revision aec3a1eb215445e63ba5702f8d6b1e0f2e8c27b9
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- Parser.cpp - C Language Family Parser ----------------------------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file implements the Parser interfaces. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Parse/Parser.h" 155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Parse/DeclSpec.h" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Parse/Scope.h" 175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::Parser(Preprocessor &pp, Action &actions) 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer : PP(pp), Actions(actions), Diags(PP.getDiagnostics()) { 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Tok.setKind(tok::eof); 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = 0; 239e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner NumCachedScopes = 0; 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParenCount = BracketCount = BraceCount = 0; 25a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCImpDecl = 0; 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Out-of-line virtual destructor to provide home for Action class. 295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::~Action() {} 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::Diag(SourceLocation Loc, unsigned DiagID, 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const std::string &Msg) { 349c728dc4d8da89c73fcae74c9e72d7a83ffd7b6dTed Kremenek Diags.Report(FullSourceLoc(Loc,PP.getSourceManager()), DiagID, &Msg, 1); 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// MatchRHSPunctuation - For punctuation with a LHS and RHS (e.g. '['/']'), 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// this helper function matches and consumes the specified RHS token if 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// present. If not present, it emits the specified diagnostic indicating 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the parser failed to match the RHS of the token at LHSLoc. LHSName 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// should be the name of the unmatched LHS token. 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerSourceLocation Parser::MatchRHSPunctuation(tok::TokenKind RHSTok, 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation LHSLoc) { 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 45000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(RHSTok)) 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ConsumeAnyToken(); 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation R = Tok.getLocation(); 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *LHSName = "unknown"; 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::kind DID = diag::err_parse_error; 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (RHSTok) { 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: break; 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break; 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break; 555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break; 565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greater: LHSName = "<"; DID = diag::err_expected_greater; break; 575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, DID); 595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(LHSLoc, diag::err_matching, LHSName); 605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(RHSTok); 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return R; 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the 655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// input. If so, it is consumed and false is returned. 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If the input is malformed, this emits the specified diagnostic. Next, if 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// returned. 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID, 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *Msg, tok::TokenKind SkipToTok) { 72000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(ExpectedTok)) { 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, DiagID, Msg); 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (SkipToTok != tok::unknown) 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(SkipToTok); 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Error recovery. 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipUntil - Read tokens until we get to the specified token, then consume 88012cf464254804279efa84e21b4b493dde76c5f1Chris Lattner/// it (unless DontConsume is true). Because we cannot guarantee that the 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// token will ever occur, this skips to the next token, or to some likely 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// good stopping point. If StopAtSemi is true, skipping will stop at a ';' 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character. 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If SkipUntil finds the specified token, it returns true, otherwise it 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// returns false. 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::SkipUntil(const tok::TokenKind *Toks, unsigned NumToks, 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool StopAtSemi, bool DontConsume) { 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We always want this function to skip at least one token if the first token 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // isn't T and if not at EOF. 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isFirstTokenSkipped = true; 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we found one of the tokens, stop and return true. 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; i != NumToks; ++i) { 103000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(Toks[i])) { 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DontConsume) { 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Noop, don't consume the token. 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::eof: 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ran out of tokens. 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_paren: 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested parens. 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_paren, false); 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_square: 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested square brackets. 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_square, false); 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_brace: 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested braces. 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_brace, false); 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Okay, we found a ']' or '}' or ')', which we think should be balanced. 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Since the user wasn't looking for this token (if they were, it would 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // already be handled), this isn't balanced. If there is a LHS token at a 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // higher level, we will assume that this matches the unbalanced token 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and return it. Otherwise, this is a spurious RHS token, which we skip. 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren: 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ParenCount && !isFirstTokenSkipped) 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BracketCount && !isFirstTokenSkipped) 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace: 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BraceCount && !isFirstTokenSkipped) 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::string_literal: 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::wide_string_literal: 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeStringToken(); 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StopAtSemi) 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip this token. 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isFirstTokenSkipped = false; 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Scope manipulation 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// EnterScope - Start a new scope. 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::EnterScope(unsigned ScopeFlags) { 1789e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes) { 1799e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *N = ScopeCache[--NumCachedScopes]; 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer N->Init(CurScope, ScopeFlags); 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = N; 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = new Scope(CurScope, ScopeFlags); 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExitScope - Pop a scope off the scope stack. 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ExitScope() { 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope && "Scope imbalance!"); 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 19190ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // Inform the actions module that this scope is going away if there are any 19290ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // decls in it. 19390ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner if (!CurScope->decl_empty()) 194b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnPopScope(Tok.getLocation(), CurScope); 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1969e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *OldScope = CurScope; 1979e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner CurScope = OldScope->getParent(); 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1999e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes == ScopeCacheSize) 2009e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete OldScope; 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 2029e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner ScopeCache[NumCachedScopes++] = OldScope; 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// C99 6.9: External Definitions. 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::~Parser() { 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we still have scopes active, delete the scope tree. 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete CurScope; 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Free the scope cache. 2179e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner for (unsigned i = 0, e = NumCachedScopes; i != e; ++i) 2189e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete ScopeCache[i]; 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Initialize - Warm up the parser. 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::Initialize() { 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Prime the lexer look-ahead. 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 22731e057270232c1c37602579cb6461c2704175672Chris Lattner // Create the translation unit scope. Install it as the current scope. 2285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope == 0 && "A scope is already active?"); 22931e057270232c1c37602579cb6461c2704175672Chris Lattner EnterScope(Scope::DeclScope); 230b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnTranslationUnitScope(Tok.getLocation(), CurScope); 231b216c8861c60af9c56c900a485233255c4452df2Steve Naroff 232000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::eof) && 233f72617544287acf0281c3b1a733bcb22a02e6ca4Chris Lattner !getLang().CPlusPlus) // Empty source file is an extension in C 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_empty_source_file); 23534870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner 23634870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner // Initialization for Objective-C context sensitive keywords recognition. 237a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek // Referenced in Parser::ParseObjCTypeQualifierList. 23834870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner if (getLang().ObjC1) { 239a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in"); 240a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out"); 241a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout"); 242a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway"); 243a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy"); 244a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref"); 24534870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner } 246d0f97d1716a138a8d9e0df8e5af77334663723d8Fariborz Jahanian if (getLang().ObjC2) { 247a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_readonly] = &PP.getIdentifierTable().get("readonly"); 248a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_getter] = &PP.getIdentifierTable().get("getter"); 249a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_setter] = &PP.getIdentifierTable().get("setter"); 250a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_assign] = &PP.getIdentifierTable().get("assign"); 251a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_readwrite] = 252d0f97d1716a138a8d9e0df8e5af77334663723d8Fariborz Jahanian &PP.getIdentifierTable().get("readwrite"); 253a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_retain] = &PP.getIdentifierTable().get("retain"); 254a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_copy] = &PP.getIdentifierTable().get("copy"); 255a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_nonatomic] = 256d0f97d1716a138a8d9e0df8e5af77334663723d8Fariborz Jahanian &PP.getIdentifierTable().get("nonatomic"); 2570196cab54007ff072ec2642da8911c6b7e8d3fb5Fariborz Jahanian ObjCForCollectionInKW = &PP.getIdentifierTable().get("in"); 258d0f97d1716a138a8d9e0df8e5af77334663723d8Fariborz Jahanian } 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTopLevelDecl - Parse one top-level declaration, return whatever the 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// action tells us to. This returns true if the EOF was encountered. 26389307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroffbool Parser::ParseTopLevelDecl(DeclTy*& Result) { 26489307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = 0; 265000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::eof)) return true; 2665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 26789307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = ParseExternalDeclaration(); 2685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Finalize - Shut down the parser. 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::Finalize() { 2745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ExitScope(); 2755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope == 0 && "Scope imbalance!"); 2765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTranslationUnit: 2795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// translation-unit: [C99 6.9] 2805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// external-declaration 2815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// translation-unit external-declaration 2825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseTranslationUnit() { 2835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Initialize(); 2845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 28589307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff DeclTy *Res; 28689307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff while (!ParseTopLevelDecl(Res)) 2875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /*parse them all*/; 2885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Finalize(); 2905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseExternalDeclaration: 2935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// external-declaration: [C99 6.9] 294c3018153a11afe91849748a93d920040a571b76cChris Lattner/// function-definition 295c3018153a11afe91849748a93d920040a571b76cChris Lattner/// declaration 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [EXT] ';' 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition 298c3018153a11afe91849748a93d920040a571b76cChris Lattner/// [GNU] __extension__ external-declaration 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-definition 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-declaration 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-alias-declaration 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-protocol-definition 3035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-method-definition 3045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] @end 3055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition: 3075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// simple-asm-expr ';' 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseExternalDeclaration() { 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 3115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_top_level_semi); 3135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Invoke action for top-level semicolon. 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 316c3018153a11afe91849748a93d920040a571b76cChris Lattner case tok::kw___extension__: { 317c3018153a11afe91849748a93d920040a571b76cChris Lattner ConsumeToken(); 318c3018153a11afe91849748a93d920040a571b76cChris Lattner // FIXME: Disable extension warnings. 319c3018153a11afe91849748a93d920040a571b76cChris Lattner DeclTy *RV = ParseExternalDeclaration(); 320c3018153a11afe91849748a93d920040a571b76cChris Lattner // FIXME: Restore extension warnings. 321c3018153a11afe91849748a93d920040a571b76cChris Lattner return RV; 322c3018153a11afe91849748a93d920040a571b76cChris Lattner } 323dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson case tok::kw_asm: { 324dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ExprResult Result = ParseSimpleAsm(); 325dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson 3263f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 3273f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson "top-level asm block"); 328dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson 329dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson if (!Result.isInvalid) 330dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson return Actions.ActOnFileScopeAsmDecl(Tok.getLocation(), Result.Val); 331aec3a1eb215445e63ba5702f8d6b1e0f2e8c27b9Chris Lattner return 0; 332dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson } 3335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::at: 3345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // @ is not a legal token unless objc is enabled, no need to check. 3352bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff return ParseObjCAtDirectives(); 3365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::minus: 3375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::plus: 33860fbca0b027ff5a6579f16cb6e3abab826e0d967Fariborz Jahanian if (getLang().ObjC1) 33971c0a951d08dc7a2a057df8c15f22b36f6aa47c7Steve Naroff return ParseObjCMethodDefinition(); 34060fbca0b027ff5a6579f16cb6e3abab826e0d967Fariborz Jahanian else { 3415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_external_declaration); 3425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 3458f08cb7d0b97786b17ef05e05caa55aad4d6bd39Chris Lattner case tok::kw_namespace: 3465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::kw_typedef: 347bae35118fc5cea2da08567dbb9763af7f906dae2Chris Lattner // A function definition cannot start with a these keywords. 3485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclaration(Declarator::FileContext); 3495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 3505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We can't tell whether this is a function-definition or declaration yet. 3515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclarationOrFunctionDefinition(); 3525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or 3565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a declaration. We can't tell which we have until we read up to the 3575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// compound-statement in function-definition. 3585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// function-definition: [C99 6.9.1] 360a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 361a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 362a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 363a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// 3645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// declaration: [C99 6.7] 365697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// declaration-specifiers init-declarator-list[opt] ';' 366697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// [!C99] init-declarator-list ';' [TODO: warn in c99 mode] 3675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OMP] threadprivate-directive [TODO] 3685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseDeclarationOrFunctionDefinition() { 3705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 3715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 3725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 3739532414c45a7114d9e94a733121655a5b5d5b473Steve Naroff 3745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 3755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // declaration-specifiers init-declarator-list[opt] ';' 376000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 3775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 3795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 381527fe23f8cbc6a4da1737a547a2517bc92fa88c8Steve Naroff // ObjC2 allows prefix attributes on class interfaces. 382000732226610650837478cba97843d19b75f648eChris Lattner if (getLang().ObjC2 && Tok.is(tok::at)) { 383dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff SourceLocation AtLoc = ConsumeToken(); // the "@" 384cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner if (!Tok.isObjCAtKeyword(tok::objc_interface)) { 385cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner Diag(Tok, diag::err_objc_expected_property_attr);//FIXME:better diagnostic 386cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner SkipUntil(tok::semi); // FIXME: better skip? 387cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner return 0; 388cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner } 3890de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian const char *PrevSpec = 0; 3900de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec)) 3910de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian Diag(AtLoc, diag::err_invalid_decl_spec_combination, PrevSpec); 392cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner return ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()); 393dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff } 394dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff 395c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // If the declspec consisted only of 'extern' and we have a string 396c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // literal following it, this must be a C++ linkage specifier like 397c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // 'extern "C"'. 3983c6f6a7a1bb9969112617a26d2333bab2f6efd65Chris Lattner if (Tok.is(tok::string_literal) && getLang().CPlusPlus && 399c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getStorageClassSpec() == DeclSpec::SCS_extern && 400c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) 401c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner return ParseLinkage(Declarator::FileContext); 402c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 4035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator. 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator DeclaratorInfo(DS, Declarator::FileContext); 4055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(DeclaratorInfo); 4065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Error parsing the declarator? 4075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DeclaratorInfo.getIdentifier() == 0) { 4085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If so, skip until the semi-colon or a }. 4095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_brace, true); 410000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 4115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 4125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the declarator is the start of a function definition, handle it. 416000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::equal) || // int X()= -> not a function def 417000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::comma) || // int X(), -> not a function def 418000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::semi) || // int X(); -> not a function def 419000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def 420000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::kw___attribute)) { // int X() __attr__ -> not a function def 4215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 4225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (DeclaratorInfo.isFunctionDeclarator() && 423000732226610650837478cba97843d19b75f648eChris Lattner (Tok.is(tok::l_brace) || // int X() {} 4245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isDeclarationSpecifier())) { // int X(f) int f; {} 425e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 426e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff Diag(Tok, diag::err_function_declared_typedef); 427e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff 428e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (Tok.is(tok::l_brace)) { 429e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // This recovery skips the entire function body. It would be nice 430e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // to simply call ParseFunctionDefintion() below, however Sema 431e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // assumes the declarator represents a function, not a typedef. 432e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff ConsumeBrace(); 433e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::r_brace, true); 434e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } else { 435e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::semi); 436e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 437e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff return 0; 438e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 4395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseFunctionDefinition(DeclaratorInfo); 4405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 4415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DeclaratorInfo.isFunctionDeclarator()) 4425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 4435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 4445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_after_declarator); 4455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi); 4465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the init-declarator-list for a normal declaration. 4505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo); 4515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseFunctionDefinition - We parsed and verified that the specified 4545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Declarator is well formed. If this is a K&R-style function, read the 4555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// parameters declaration-list, then start the compound-statement. 4565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 457a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// function-definition: [C99 6.9.1] 458a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 459a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 460a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 4615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 4625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseFunctionDefinition(Declarator &D) { 4635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0); 4645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(FnTypeInfo.Kind == DeclaratorChunk::Function && 4655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "This isn't a function declarator!"); 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun; 4675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 468a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // If this is C90 and the declspecs were completely missing, fudge in an 469a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // implicit int. We do this here because this is the only place where 470a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // declaration-specifiers are completely optional in the grammar. 471d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner if (getLang().ImplicitInt && D.getDeclSpec().getParsedSpecifiers() == 0) { 472a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner const char *PrevSpec; 473a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner D.getDeclSpec().SetTypeSpecType(DeclSpec::TST_int, D.getIdentifierLoc(), 474a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner PrevSpec); 475a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner } 476a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner 4775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this declaration was formed with a K&R-style identifier list for the 4785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // arguments, parse declarations for all of the args next. 4795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // int foo(a,b) int a; float b; {} 4805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!FTI.hasPrototype && FTI.NumArgs != 0) 4815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseKNRParamDeclarations(D); 4825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We should have an opening brace now. 484000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_brace)) { 4855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over garbage, until we get to '{'. Don't eat the '{'. 4885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::l_brace, true, true); 4895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we didn't find the '{', bail out. 491000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_brace)) 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 495b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner SourceLocation BraceLoc = Tok.getLocation(); 496b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner 497b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Enter a scope for the function body. 498b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner EnterScope(Scope::FnScope|Scope::DeclScope); 499b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner 500b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Tell the actions module that we have entered a function definition with the 501b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // specified Declarator for the function. 502b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner DeclTy *Res = Actions.ActOnStartOfFunctionDef(CurScope, D); 503b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner 504f9ed3157c93495474003a5ec360039030fd42e9cFariborz Jahanian return ParseFunctionStatementBody(Res, BraceLoc, BraceLoc); 5055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// types for a function with a K&R-style identifier list for arguments. 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseKNRParamDeclarations(Declarator &D) { 5105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that the top-level of this declarator is a function. 5115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; 5125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 51304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Enter function-declaration scope, limiting any declarators to the 51404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // function prototype scope, including parameter declarators. 5156e33dd5b5cbaddadd54bebe07c8397844365d885Eli Friedman EnterScope(Scope::FnScope|Scope::DeclScope); 51604421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 5175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read all the argument declarations. 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (isDeclarationSpecifier()) { 5195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation DSStart = Tok.getLocation(); 5205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 5225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 5235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 5245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: 'each declaration in the declaration list shall have at 5265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // least one declarator'. 5275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // NOTE: GCC just makes this an ext-warn. It's not clear what it does with 5285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the declarations though. It's trivial to ignore them, really hard to do 5295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // anything else with them. 530000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 5315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DSStart, diag::err_declaration_does_not_declare_param); 5325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 5335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 5345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other 5375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // than register. 5385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && 5395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getStorageClassSpec() != DeclSpec::SCS_register) { 5405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getStorageClassSpecLoc(), 5415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 5425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.isThreadSpecified()) { 5455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getThreadSpecLoc(), 5465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 5475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator attached to this declspec. 5515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext); 5525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 5535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Handle the full declarator list. 5555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 5565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclTy *AttrList; 5575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If attributes are present, parse them. 558000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::kw___attribute)) 5595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: attach attributes too. 5605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AttrList = ParseAttributes(); 5615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ask the actions module to compute the type for this declarator. 56304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Action::DeclTy *Param = 56404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Actions.ActOnParamDeclarator(CurScope, ParmDeclarator); 5652bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff 56604421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner if (Param && 5675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // A missing identifier has already been diagnosed. 5685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()) { 5695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan the argument list looking for the correct param to apply this 5715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // type. 5725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; ; ++i) { 5735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: those declarators shall declare only identifiers from 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the identifier list. 5755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (i == FTI.NumArgs) { 5765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param, 5775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()->getName()); 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 5795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) { 5825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reject redefinitions of parameters. 58304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner if (FTI.ArgInfo[i].Param) { 5845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ParmDeclarator.getIdentifierLoc(), 5855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_param_redefinition, 5865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()->getName()); 5875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 58804421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner FTI.ArgInfo[i].Param = Param; 5895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we don't have a comma, it is either the end of the list (a ';') or 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // an error, bail out. 597000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::comma)) 5985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 5995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Consume the comma. 6015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the next declarator. 6045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.clear(); 6055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 6065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 608000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 6095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 6115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_parse_error); 6125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip to end of block or statement 6135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi, true); 614000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 61904421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Leave prototype scope. 62004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner ExitScope(); 62104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 6225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The actions module must verify that all arguments were declared. 6235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseAsmStringLiteral - This is just a normal string-literal, but is not 6275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// allowed to be a wide string, and is not subject to character translation. 6285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-string-literal: 6305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6326a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders CarlssonParser::ExprResult Parser::ParseAsmStringLiteral() { 6335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isTokenStringLiteral()) { 6345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_string_literal); 6356a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson return true; 6365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ExprResult Res = ParseStringLiteralExpression(); 6396a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson if (Res.isInvalid) return true; 6405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Diagnose: wide string literal in 'asm' 6426a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson 6436a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson return Res; 6445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseSimpleAsm 6475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] simple-asm-expr: 6495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 'asm' '(' asm-string-literal ')' 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 651dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders CarlssonParser::ExprResult Parser::ParseSimpleAsm() { 652000732226610650837478cba97843d19b75f648eChris Lattner assert(Tok.is(tok::kw_asm) && "Not an asm!"); 653dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson SourceLocation Loc = ConsumeToken(); 6545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 655000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_paren)) { 6565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_lparen_after, "asm"); 657aec3a1eb215445e63ba5702f8d6b1e0f2e8c27b9Chris Lattner return true; 6585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 660dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ConsumeParen(); 6615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 662dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ExprResult Result = ParseAsmStringLiteral(); 6635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer MatchRHSPunctuation(tok::r_paren, Loc); 665dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson 666dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson return Result; 6675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 669