Parser.cpp revision 10bd36882406cdf4805e35add1ce2f11ab9ae152
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" 15e4858a65a93fb36c099d8dd2ea0a98e33e77687eDaniel Dunbar#include "clang/Basic/Diagnostic.h" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Parse/DeclSpec.h" 175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Parse/Scope.h" 18c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner#include "ExtensionRAIIObject.h" 19fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar#include "ParsePragma.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::Parser(Preprocessor &pp, Action &actions) 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer : PP(pp), Actions(actions), Diags(PP.getDiagnostics()) { 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Tok.setKind(tok::eof); 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = 0; 269e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner NumCachedScopes = 0; 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParenCount = BracketCount = BraceCount = 0; 28a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCImpDecl = 0; 29fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 30fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // Add #pragma handlers. These are removed and destroyed in the 31fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // destructor. 32fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar PackHandler = 33fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar new PragmaPackHandler(&PP.getIdentifierTable().get("pack"), actions); 34fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar PP.AddPragmaHandler(0, PackHandler); 35fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 364cc18a4d5222e04bd568b1e3e4d86127dbbcdf3fArgyrios Kyrtzidis // Instantiate a LexedMethodsForTopClass for all the non-nested classes. 374cc18a4d5222e04bd568b1e3e4d86127dbbcdf3fArgyrios Kyrtzidis PushTopClassStack(); 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Out-of-line virtual destructor to provide home for Action class. 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::~Action() {} 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 444fef81d718ca1b91ce2adef52db91a35f86e9bbdChris Lattnerbool Parser::Diag(SourceLocation Loc, unsigned DiagID, 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const std::string &Msg) { 469c728dc4d8da89c73fcae74c9e72d7a83ffd7b6dTed Kremenek Diags.Report(FullSourceLoc(Loc,PP.getSourceManager()), DiagID, &Msg, 1); 474fef81d718ca1b91ce2adef52db91a35f86e9bbdChris Lattner return true; 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 50897e7a38c73a28731f8cdbaa4385ca15ab65820cArgyrios Kyrtzidisbool Parser::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg, 51a88b509d233d3f42382130c159c05cafa006b3e0Argyrios Kyrtzidis const SourceRange& Range) { 52897e7a38c73a28731f8cdbaa4385ca15ab65820cArgyrios Kyrtzidis Diags.Report(PP.getFullLoc(Loc), DiagID, &Msg, 1, &Range,1); 53897e7a38c73a28731f8cdbaa4385ca15ab65820cArgyrios Kyrtzidis return true; 54897e7a38c73a28731f8cdbaa4385ca15ab65820cArgyrios Kyrtzidis} 55897e7a38c73a28731f8cdbaa4385ca15ab65820cArgyrios Kyrtzidis 564fef81d718ca1b91ce2adef52db91a35f86e9bbdChris Lattnerbool Parser::Diag(SourceLocation Loc, unsigned DiagID, const SourceRange &R) { 57844cef32e4359c3e651e4eb84beca0c3e8a727d5Chris Lattner Diags.Report(FullSourceLoc(Loc,PP.getSourceManager()), DiagID, 0, 0, 58844cef32e4359c3e651e4eb84beca0c3e8a727d5Chris Lattner &R, 1); 594fef81d718ca1b91ce2adef52db91a35f86e9bbdChris Lattner return true; 60844cef32e4359c3e651e4eb84beca0c3e8a727d5Chris Lattner} 61844cef32e4359c3e651e4eb84beca0c3e8a727d5Chris Lattner 62844cef32e4359c3e651e4eb84beca0c3e8a727d5Chris Lattner 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// MatchRHSPunctuation - For punctuation with a LHS and RHS (e.g. '['/']'), 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// this helper function matches and consumes the specified RHS token if 655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// present. If not present, it emits the specified diagnostic indicating 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the parser failed to match the RHS of the token at LHSLoc. LHSName 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// should be the name of the unmatched LHS token. 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerSourceLocation Parser::MatchRHSPunctuation(tok::TokenKind RHSTok, 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation LHSLoc) { 70a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 71000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(RHSTok)) 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ConsumeAnyToken(); 73a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation R = Tok.getLocation(); 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *LHSName = "unknown"; 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::kind DID = diag::err_parse_error; 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (RHSTok) { 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: break; 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break; 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break; 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break; 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greater: LHSName = "<"; DID = diag::err_expected_greater; break; 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, DID); 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(LHSLoc, diag::err_matching, LHSName); 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(RHSTok); 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return R; 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// input. If so, it is consumed and false is returned. 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If the input is malformed, this emits the specified diagnostic. Next, if 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// returned. 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID, 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *Msg, tok::TokenKind SkipToTok) { 98000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(ExpectedTok)) { 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 102a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, DiagID, Msg); 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (SkipToTok != tok::unknown) 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(SkipToTok); 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Error recovery. 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipUntil - Read tokens until we get to the specified token, then consume 114012cf464254804279efa84e21b4b493dde76c5f1Chris Lattner/// it (unless DontConsume is true). Because we cannot guarantee that the 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// token will ever occur, this skips to the next token, or to some likely 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// good stopping point. If StopAtSemi is true, skipping will stop at a ';' 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character. 118a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If SkipUntil finds the specified token, it returns true, otherwise it 120a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// returns false. 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::SkipUntil(const tok::TokenKind *Toks, unsigned NumToks, 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool StopAtSemi, bool DontConsume) { 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We always want this function to skip at least one token if the first token 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // isn't T and if not at EOF. 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isFirstTokenSkipped = true; 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we found one of the tokens, stop and return true. 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; i != NumToks; ++i) { 129000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(Toks[i])) { 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DontConsume) { 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Noop, don't consume the token. 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 138a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::eof: 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ran out of tokens. 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 143a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_paren: 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested parens. 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_paren, false); 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_square: 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested square brackets. 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_square, false); 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_brace: 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested braces. 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_brace, false); 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 159a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Okay, we found a ']' or '}' or ')', which we think should be balanced. 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Since the user wasn't looking for this token (if they were, it would 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // already be handled), this isn't balanced. If there is a LHS token at a 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // higher level, we will assume that this matches the unbalanced token 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and return it. Otherwise, this is a spurious RHS token, which we skip. 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren: 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ParenCount && !isFirstTokenSkipped) 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BracketCount && !isFirstTokenSkipped) 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace: 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BraceCount && !isFirstTokenSkipped) 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 180a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::string_literal: 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::wide_string_literal: 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeStringToken(); 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StopAtSemi) 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip this token. 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isFirstTokenSkipped = false; 195a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump } 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Scope manipulation 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// EnterScope - Start a new scope. 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::EnterScope(unsigned ScopeFlags) { 2049e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes) { 2059e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *N = ScopeCache[--NumCachedScopes]; 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer N->Init(CurScope, ScopeFlags); 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = N; 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = new Scope(CurScope, ScopeFlags); 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExitScope - Pop a scope off the scope stack. 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ExitScope() { 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope && "Scope imbalance!"); 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 21790ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // Inform the actions module that this scope is going away if there are any 21890ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // decls in it. 21990ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner if (!CurScope->decl_empty()) 220b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnPopScope(Tok.getLocation(), CurScope); 221a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2229e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *OldScope = CurScope; 2239e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner CurScope = OldScope->getParent(); 224a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2259e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes == ScopeCacheSize) 2269e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete OldScope; 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 2289e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner ScopeCache[NumCachedScopes++] = OldScope; 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// C99 6.9: External Definitions. 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::~Parser() { 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we still have scopes active, delete the scope tree. 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete CurScope; 241a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Free the scope cache. 2439e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner for (unsigned i = 0, e = NumCachedScopes; i != e; ++i) 2449e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete ScopeCache[i]; 245fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 246fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // Remove the pragma handlers we installed. 247fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar PP.RemovePragmaHandler(0, PackHandler); 248fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar delete PackHandler; 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Initialize - Warm up the parser. 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::Initialize() { 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Prime the lexer look-ahead. 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 256a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 25731e057270232c1c37602579cb6461c2704175672Chris Lattner // Create the translation unit scope. Install it as the current scope. 2585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope == 0 && "A scope is already active?"); 25931e057270232c1c37602579cb6461c2704175672Chris Lattner EnterScope(Scope::DeclScope); 260b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnTranslationUnitScope(Tok.getLocation(), CurScope); 261a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 262000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::eof) && 263f72617544287acf0281c3b1a733bcb22a02e6ca4Chris Lattner !getLang().CPlusPlus) // Empty source file is an extension in C 2645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_empty_source_file); 265a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 26634870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner // Initialization for Objective-C context sensitive keywords recognition. 267a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek // Referenced in Parser::ParseObjCTypeQualifierList. 26834870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner if (getLang().ObjC1) { 269a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in"); 270a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out"); 271a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout"); 272a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway"); 273a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy"); 274a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref"); 27534870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner } 276662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar 277662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar Ident_super = &PP.getIdentifierTable().get("super"); 2785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTopLevelDecl - Parse one top-level declaration, return whatever the 2815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// action tells us to. This returns true if the EOF was encountered. 28289307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroffbool Parser::ParseTopLevelDecl(DeclTy*& Result) { 28389307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = 0; 2849299f3fa85796613cc787a2062c9562d07c8613eChris Lattner if (Tok.is(tok::eof)) { 2859299f3fa85796613cc787a2062c9562d07c8613eChris Lattner Actions.ActOnEndOfTranslationUnit(); 2869299f3fa85796613cc787a2062c9562d07c8613eChris Lattner return true; 2879299f3fa85796613cc787a2062c9562d07c8613eChris Lattner } 288a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 28989307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = ParseExternalDeclaration(); 2905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTranslationUnit: 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// translation-unit: [C99 6.9] 295a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// external-declaration 296a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// translation-unit external-declaration 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseTranslationUnit() { 298a9e8fec80088f4e176d80b84bddddfbc9ab0f548Chris Lattner Initialize(); // pushes a scope. 299a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 30089307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff DeclTy *Res; 30189307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff while (!ParseTopLevelDecl(Res)) 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /*parse them all*/; 30306f548596beef4c0a227a45cba996497f99566c0Chris Lattner 30406f548596beef4c0a227a45cba996497f99566c0Chris Lattner ExitScope(); 30506f548596beef4c0a227a45cba996497f99566c0Chris Lattner assert(CurScope == 0 && "Scope imbalance!"); 3065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseExternalDeclaration: 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// external-declaration: [C99 6.9] 310c3018153a11afe91849748a93d920040a571b76cChris Lattner/// function-definition 311c3018153a11afe91849748a93d920040a571b76cChris Lattner/// declaration 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [EXT] ';' 3135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition 314c3018153a11afe91849748a93d920040a571b76cChris Lattner/// [GNU] __extension__ external-declaration 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-definition 3165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-declaration 3175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-alias-declaration 3185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-protocol-definition 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-method-definition 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] @end 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition: 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// simple-asm-expr ';' 3245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseExternalDeclaration() { 3265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 3275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 3285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_top_level_semi); 3295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Invoke action for top-level semicolon. 3315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 332c3018153a11afe91849748a93d920040a571b76cChris Lattner case tok::kw___extension__: { 333c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner // __extension__ silences extension warnings in the subexpression. 334c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner ExtensionRAIIObject O(Diags); // Use RAII to do this. 33539146d6497ad5e7ca8ef639221e7b3e15d07c888Chris Lattner ConsumeToken(); 336c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner return ParseExternalDeclaration(); 337c3018153a11afe91849748a93d920040a571b76cChris Lattner } 338dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson case tok::kw_asm: { 339dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ExprResult Result = ParseSimpleAsm(); 340a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 3413f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 3423f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson "top-level asm block"); 343dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson 344dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson if (!Result.isInvalid) 345dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson return Actions.ActOnFileScopeAsmDecl(Tok.getLocation(), Result.Val); 346aec3a1eb215445e63ba5702f8d6b1e0f2e8c27b9Chris Lattner return 0; 347dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson } 3485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::at: 3495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // @ is not a legal token unless objc is enabled, no need to check. 3502bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff return ParseObjCAtDirectives(); 3515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::minus: 3525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::plus: 35360fbca0b027ff5a6579f16cb6e3abab826e0d967Fariborz Jahanian if (getLang().ObjC1) 35471c0a951d08dc7a2a057df8c15f22b36f6aa47c7Steve Naroff return ParseObjCMethodDefinition(); 35560fbca0b027ff5a6579f16cb6e3abab826e0d967Fariborz Jahanian else { 3565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_external_declaration); 3575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 3608f08cb7d0b97786b17ef05e05caa55aad4d6bd39Chris Lattner case tok::kw_namespace: 3615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::kw_typedef: 362bae35118fc5cea2da08567dbb9763af7f906dae2Chris Lattner // A function definition cannot start with a these keywords. 3635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclaration(Declarator::FileContext); 3645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 3655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We can't tell whether this is a function-definition or declaration yet. 3665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclarationOrFunctionDefinition(); 3675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or 3715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a declaration. We can't tell which we have until we read up to the 3725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// compound-statement in function-definition. 3735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// function-definition: [C99 6.9.1] 375a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 376a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 377a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 378a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// 3795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// declaration: [C99 6.7] 380697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// declaration-specifiers init-declarator-list[opt] ';' 381697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// [!C99] init-declarator-list ';' [TODO: warn in c99 mode] 3825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OMP] threadprivate-directive [TODO] 3835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseDeclarationOrFunctionDefinition() { 3855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 3865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 3875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 388a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 3895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 3905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // declaration-specifiers init-declarator-list[opt] ';' 391000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 3925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 3945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 395a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 396246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // ObjC2 allows prefix attributes on class interfaces and protocols. 397246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // FIXME: This still needs better diagnostics. We should only accept 398246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // attributes here, no types, etc. 399000732226610650837478cba97843d19b75f648eChris Lattner if (getLang().ObjC2 && Tok.is(tok::at)) { 400dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff SourceLocation AtLoc = ConsumeToken(); // the "@" 401246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (!Tok.isObjCAtKeyword(tok::objc_interface) && 402246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar !Tok.isObjCAtKeyword(tok::objc_protocol)) { 403246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar Diag(Tok, diag::err_objc_unexpected_attr); 404cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner SkipUntil(tok::semi); // FIXME: better skip? 405cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner return 0; 406cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner } 4070de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian const char *PrevSpec = 0; 4080de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec)) 4090de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian Diag(AtLoc, diag::err_invalid_decl_spec_combination, PrevSpec); 410246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (Tok.isObjCAtKeyword(tok::objc_protocol)) 411246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes()); 412a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump return ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()); 413dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff } 414a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 415c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // If the declspec consisted only of 'extern' and we have a string 416c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // literal following it, this must be a C++ linkage specifier like 417c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // 'extern "C"'. 4183c6f6a7a1bb9969112617a26d2333bab2f6efd65Chris Lattner if (Tok.is(tok::string_literal) && getLang().CPlusPlus && 419c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getStorageClassSpec() == DeclSpec::SCS_extern && 420c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) 421c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner return ParseLinkage(Declarator::FileContext); 422c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 4235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator. 4245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator DeclaratorInfo(DS, Declarator::FileContext); 4255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(DeclaratorInfo); 4265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Error parsing the declarator? 42710bd36882406cdf4805e35add1ce2f11ab9ae152Douglas Gregor if (!DeclaratorInfo.hasName()) { 4285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If so, skip until the semi-colon or a }. 4295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_brace, true); 430000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 4315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 4325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the declarator is the start of a function definition, handle it. 436000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::equal) || // int X()= -> not a function def 437000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::comma) || // int X(), -> not a function def 438000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::semi) || // int X(); -> not a function def 439000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def 44073a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def 44173a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis (getLang().CPlusPlus && 44273a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis Tok.is(tok::l_paren)) ) { // int X(0) -> not a function def [C++] 4435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 4445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (DeclaratorInfo.isFunctionDeclarator() && 445cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis (Tok.is(tok::l_brace) || // int X() {} 446cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis ( !getLang().CPlusPlus && 447cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis isDeclarationSpecifier() ))) { // int X(f) int f; {} 448e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 449e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff Diag(Tok, diag::err_function_declared_typedef); 450a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 451e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (Tok.is(tok::l_brace)) { 452e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // This recovery skips the entire function body. It would be nice 453a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump // to simply call ParseFunctionDefintion() below, however Sema 454e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // assumes the declarator represents a function, not a typedef. 455e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff ConsumeBrace(); 456e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::r_brace, true); 457e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } else { 458e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::semi); 459e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 460e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff return 0; 461e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 4625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseFunctionDefinition(DeclaratorInfo); 4635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 4645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DeclaratorInfo.isFunctionDeclarator()) 4655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 4675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_after_declarator); 4685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi); 4695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the init-declarator-list for a normal declaration. 4735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo); 4745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseFunctionDefinition - We parsed and verified that the specified 4775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Declarator is well formed. If this is a K&R-style function, read the 4785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// parameters declaration-list, then start the compound-statement. 4795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 480a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// function-definition: [C99 6.9.1] 481a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 482a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 483a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 4847ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 4857ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// decl-specifier-seq[opt] declarator ctor-initializer[opt] function-body 4867ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 4877ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// decl-specifier-seq[opt] declarator function-try-block [TODO] 4885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 4895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseFunctionDefinition(Declarator &D) { 4905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0); 4915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(FnTypeInfo.Kind == DeclaratorChunk::Function && 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "This isn't a function declarator!"); 4935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun; 494a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 495a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // If this is C90 and the declspecs were completely missing, fudge in an 496a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // implicit int. We do this here because this is the only place where 497a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // declaration-specifiers are completely optional in the grammar. 498d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner if (getLang().ImplicitInt && D.getDeclSpec().getParsedSpecifiers() == 0) { 499a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner const char *PrevSpec; 50031c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int, 50131c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getIdentifierLoc(), 50231c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner PrevSpec); 503a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner } 504a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this declaration was formed with a K&R-style identifier list for the 5065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // arguments, parse declarations for all of the args next. 5075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // int foo(a,b) int a; float b; {} 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!FTI.hasPrototype && FTI.NumArgs != 0) 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseKNRParamDeclarations(D); 5105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5117ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (getLang().CPlusPlus && Tok.is(tok::colon)) { 5127ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor 5137ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor } 5147ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor 5157ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // We should have either an opening brace or, in a C++ constructor, 5167ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // we may have a colon. 5177ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (Tok.isNot(tok::l_brace) && Tok.isNot(tok::colon)) { 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 5195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over garbage, until we get to '{'. Don't eat the '{'. 5215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::l_brace, true, true); 522a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we didn't find the '{', bail out. 524000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_brace)) 5255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 5265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 527a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 528b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Enter a scope for the function body. 529b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner EnterScope(Scope::FnScope|Scope::DeclScope); 530a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 531b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Tell the actions module that we have entered a function definition with the 532b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // specified Declarator for the function. 533b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner DeclTy *Res = Actions.ActOnStartOfFunctionDef(CurScope, D); 534a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5357ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // If we have a colon, then we're probably parsing a C++ 5367ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // ctor-initializer. 5377ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (Tok.is(tok::colon)) 5387ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor ParseConstructorInitializer(Res); 5397ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor 5407ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor SourceLocation BraceLoc = Tok.getLocation(); 541a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump return ParseFunctionStatementBody(Res, BraceLoc, BraceLoc); 5425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides 5455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// types for a function with a K&R-style identifier list for arguments. 5465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseKNRParamDeclarations(Declarator &D) { 5475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that the top-level of this declarator is a function. 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; 5495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 55004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Enter function-declaration scope, limiting any declarators to the 55104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // function prototype scope, including parameter declarators. 5526e33dd5b5cbaddadd54bebe07c8397844365d885Eli Friedman EnterScope(Scope::FnScope|Scope::DeclScope); 55304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 5545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read all the argument declarations. 5555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (isDeclarationSpecifier()) { 5565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation DSStart = Tok.getLocation(); 557a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 5595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 5605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 561a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: 'each declaration in the declaration list shall have at 5635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // least one declarator'. 5645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // NOTE: GCC just makes this an ext-warn. It's not clear what it does with 5655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the declarations though. It's trivial to ignore them, really hard to do 5665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // anything else with them. 567000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 5685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DSStart, diag::err_declaration_does_not_declare_param); 5695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 5705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 5715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 572a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // than register. 5755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && 5765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getStorageClassSpec() != DeclSpec::SCS_register) { 5775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getStorageClassSpecLoc(), 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 5795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 5805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.isThreadSpecified()) { 5825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getThreadSpecLoc(), 5835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 5845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 5855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 586a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator attached to this declspec. 5885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext); 5895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 5905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Handle the full declarator list. 5925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclTy *AttrList; 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If attributes are present, parse them. 595000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::kw___attribute)) 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: attach attributes too. 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AttrList = ParseAttributes(); 598a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ask the actions module to compute the type for this declarator. 600a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump Action::DeclTy *Param = 60104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Actions.ActOnParamDeclarator(CurScope, ParmDeclarator); 6022bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff 603a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump if (Param && 6045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // A missing identifier has already been diagnosed. 6055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()) { 6065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan the argument list looking for the correct param to apply this 6085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // type. 6095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; ; ++i) { 6105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: those declarators shall declare only identifiers from 6115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the identifier list. 6125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (i == FTI.NumArgs) { 6135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param, 6145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()->getName()); 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 617a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) { 6195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reject redefinitions of parameters. 62004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner if (FTI.ArgInfo[i].Param) { 6215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ParmDeclarator.getIdentifierLoc(), 6225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_param_redefinition, 6235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()->getName()); 6245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 62504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner FTI.ArgInfo[i].Param = Param; 6265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we don't have a comma, it is either the end of the list (a ';') or 6335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // an error, bail out. 634000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::comma)) 6355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 636a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Consume the comma. 6385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 639a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the next declarator. 6415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.clear(); 6425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 6435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 644a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 645000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 6465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 6485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_parse_error); 6495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip to end of block or statement 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi, true); 651000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 6525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 655a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 65604421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Leave prototype scope. 65704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner ExitScope(); 65804421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 6595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The actions module must verify that all arguments were declared. 6605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseAsmStringLiteral - This is just a normal string-literal, but is not 6645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// allowed to be a wide string, and is not subject to character translation. 6655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-string-literal: 6675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6696a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders CarlssonParser::ExprResult Parser::ParseAsmStringLiteral() { 6705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isTokenStringLiteral()) { 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_string_literal); 6726a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson return true; 6735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 674a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ExprResult Res = ParseStringLiteralExpression(); 6766a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson if (Res.isInvalid) return true; 677a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Diagnose: wide string literal in 'asm' 679a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6806a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson return Res; 6815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseSimpleAsm 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] simple-asm-expr: 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 'asm' '(' asm-string-literal ')' 6875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 688dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders CarlssonParser::ExprResult Parser::ParseSimpleAsm() { 689000732226610650837478cba97843d19b75f648eChris Lattner assert(Tok.is(tok::kw_asm) && "Not an asm!"); 690dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson SourceLocation Loc = ConsumeToken(); 691a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 692000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_paren)) { 6935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_lparen_after, "asm"); 694aec3a1eb215445e63ba5702f8d6b1e0f2e8c27b9Chris Lattner return true; 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 696a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 697dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ConsumeParen(); 698a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 699dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ExprResult Result = ParseAsmStringLiteral(); 700a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7018f5421a2cfaff0b5ef93a4116f697ed98ce08828Chris Lattner if (Result.isInvalid) 702a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar SkipUntil(tok::r_paren); 7038f5421a2cfaff0b5ef93a4116f697ed98ce08828Chris Lattner else 704a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar MatchRHSPunctuation(tok::r_paren, Loc); 705a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 706dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson return Result; 7075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 709eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateTypeOrScopeToken - If the current token position is on a 710eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typename (possibly qualified in C++) or a C++ scope specifier not followed 711eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens 712eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// with a single annotation token representing the typename or C++ scope 713eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// respectively. 714eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// This simplifies handling of C++ scope specifiers and allows efficient 715eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// backtracking without the need to re-parse and resolve nested-names and 716eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typenames. 717eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidisvoid Parser::TryAnnotateTypeOrScopeToken() { 718eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::annot_qualtypename) || Tok.is(tok::annot_cxxscope)) 719eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis return; 720eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 721eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis CXXScopeSpec SS; 722eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (isTokenCXXScopeSpecifier()) 723eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis ParseCXXScopeSpecifier(SS); 724eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 725eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::identifier)) { 726eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis TypeTy *Ty = Actions.isTypeName(*Tok.getIdentifierInfo(), CurScope, &SS); 727eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Ty) { 728eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // This is a typename. Replace the current token in-place with an 729eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // annotation type token. 730eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setKind(tok::annot_qualtypename); 731eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationValue(Ty); 732eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationEndLoc(Tok.getLocation()); 733eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (SS.isNotEmpty()) // it was a C++ qualified type name. 734eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setLocation(SS.getBeginLoc()); 735eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 736eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // In case the tokens were cached, have Preprocessor replace them with the 737eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // annotation token. 738eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.AnnotateCachedTokens(Tok); 739eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis return; 740eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 741eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 742eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 743eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (SS.isNotEmpty()) { 744eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // A C++ scope specifier that isn't followed by a typename. 745eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // Push the current token back into the token stream and use an annotation 746eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // scope token for current token. 747eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.EnterToken(Tok); 748eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setKind(tok::annot_cxxscope); 749eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationValue(SS.getScopeRep()); 750eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationRange(SS.getRange()); 751eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 752eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // In case the tokens were cached, have Preprocessor replace them with the 753eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // annotation token. 754eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.AnnotateCachedTokens(Tok); 755eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 756eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 757eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 758eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only 759eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// annotates C++ scope specifiers. 760eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidisvoid Parser::TryAnnotateScopeToken() { 761eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::annot_cxxscope)) 762eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis return; 763eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 764eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (isTokenCXXScopeSpecifier()) { 765eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis CXXScopeSpec SS; 766eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis ParseCXXScopeSpecifier(SS); 767eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 768eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // Push the current token back into the token stream and use an annotation 769eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // scope token for current token. 770eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.EnterToken(Tok); 771eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setKind(tok::annot_cxxscope); 772eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationValue(SS.getScopeRep()); 773eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationRange(SS.getRange()); 774eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 775eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // In case the tokens were cached, have Preprocessor replace them with the 776eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // annotation token. 777eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.AnnotateCachedTokens(Tok); 778eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 779eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 780