Parser.cpp revision 246e70f69cb8aeb67225c54690f1c6b25abd5a86
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" 185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::Parser(Preprocessor &pp, Action &actions) 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer : PP(pp), Actions(actions), Diags(PP.getDiagnostics()) { 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Tok.setKind(tok::eof); 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = 0; 249e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner NumCachedScopes = 0; 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParenCount = BracketCount = BraceCount = 0; 26a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCImpDecl = 0; 274cc18a4d5222e04bd568b1e3e4d86127dbbcdf3fArgyrios Kyrtzidis // Instantiate a LexedMethodsForTopClass for all the non-nested classes. 284cc18a4d5222e04bd568b1e3e4d86127dbbcdf3fArgyrios Kyrtzidis PushTopClassStack(); 295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Out-of-line virtual destructor to provide home for Action class. 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::~Action() {} 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 354fef81d718ca1b91ce2adef52db91a35f86e9bbdChris Lattnerbool Parser::Diag(SourceLocation Loc, unsigned DiagID, 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const std::string &Msg) { 379c728dc4d8da89c73fcae74c9e72d7a83ffd7b6dTed Kremenek Diags.Report(FullSourceLoc(Loc,PP.getSourceManager()), DiagID, &Msg, 1); 384fef81d718ca1b91ce2adef52db91a35f86e9bbdChris Lattner return true; 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 41897e7a38c73a28731f8cdbaa4385ca15ab65820cArgyrios Kyrtzidisbool Parser::Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg, 42a88b509d233d3f42382130c159c05cafa006b3e0Argyrios Kyrtzidis const SourceRange& Range) { 43897e7a38c73a28731f8cdbaa4385ca15ab65820cArgyrios Kyrtzidis Diags.Report(PP.getFullLoc(Loc), DiagID, &Msg, 1, &Range,1); 44897e7a38c73a28731f8cdbaa4385ca15ab65820cArgyrios Kyrtzidis return true; 45897e7a38c73a28731f8cdbaa4385ca15ab65820cArgyrios Kyrtzidis} 46897e7a38c73a28731f8cdbaa4385ca15ab65820cArgyrios Kyrtzidis 474fef81d718ca1b91ce2adef52db91a35f86e9bbdChris Lattnerbool Parser::Diag(SourceLocation Loc, unsigned DiagID, const SourceRange &R) { 48844cef32e4359c3e651e4eb84beca0c3e8a727d5Chris Lattner Diags.Report(FullSourceLoc(Loc,PP.getSourceManager()), DiagID, 0, 0, 49844cef32e4359c3e651e4eb84beca0c3e8a727d5Chris Lattner &R, 1); 504fef81d718ca1b91ce2adef52db91a35f86e9bbdChris Lattner return true; 51844cef32e4359c3e651e4eb84beca0c3e8a727d5Chris Lattner} 52844cef32e4359c3e651e4eb84beca0c3e8a727d5Chris Lattner 53844cef32e4359c3e651e4eb84beca0c3e8a727d5Chris Lattner 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// MatchRHSPunctuation - For punctuation with a LHS and RHS (e.g. '['/']'), 555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// this helper function matches and consumes the specified RHS token if 565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// present. If not present, it emits the specified diagnostic indicating 575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the parser failed to match the RHS of the token at LHSLoc. LHSName 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// should be the name of the unmatched LHS token. 595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerSourceLocation Parser::MatchRHSPunctuation(tok::TokenKind RHSTok, 605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation LHSLoc) { 61a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 62000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(RHSTok)) 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ConsumeAnyToken(); 64a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation R = Tok.getLocation(); 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *LHSName = "unknown"; 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::kind DID = diag::err_parse_error; 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (RHSTok) { 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: break; 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break; 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break; 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break; 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greater: LHSName = "<"; DID = diag::err_expected_greater; break; 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, DID); 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(LHSLoc, diag::err_matching, LHSName); 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(RHSTok); 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return R; 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// input. If so, it is consumed and false is returned. 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If the input is malformed, this emits the specified diagnostic. Next, if 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// returned. 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID, 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *Msg, tok::TokenKind SkipToTok) { 89000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(ExpectedTok)) { 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 93a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, DiagID, Msg); 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (SkipToTok != tok::unknown) 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(SkipToTok); 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Error recovery. 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipUntil - Read tokens until we get to the specified token, then consume 105012cf464254804279efa84e21b4b493dde76c5f1Chris Lattner/// it (unless DontConsume is true). Because we cannot guarantee that the 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// token will ever occur, this skips to the next token, or to some likely 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// good stopping point. If StopAtSemi is true, skipping will stop at a ';' 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character. 109a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If SkipUntil finds the specified token, it returns true, otherwise it 111a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// returns false. 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::SkipUntil(const tok::TokenKind *Toks, unsigned NumToks, 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool StopAtSemi, bool DontConsume) { 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We always want this function to skip at least one token if the first token 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // isn't T and if not at EOF. 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isFirstTokenSkipped = true; 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we found one of the tokens, stop and return true. 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; i != NumToks; ++i) { 120000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(Toks[i])) { 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DontConsume) { 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Noop, don't consume the token. 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 129a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::eof: 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ran out of tokens. 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 134a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_paren: 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested parens. 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_paren, false); 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_square: 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested square brackets. 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_square, false); 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_brace: 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested braces. 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_brace, false); 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 150a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Okay, we found a ']' or '}' or ')', which we think should be balanced. 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Since the user wasn't looking for this token (if they were, it would 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // already be handled), this isn't balanced. If there is a LHS token at a 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // higher level, we will assume that this matches the unbalanced token 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and return it. Otherwise, this is a spurious RHS token, which we skip. 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren: 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ParenCount && !isFirstTokenSkipped) 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BracketCount && !isFirstTokenSkipped) 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace: 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BraceCount && !isFirstTokenSkipped) 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 171a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::string_literal: 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::wide_string_literal: 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeStringToken(); 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StopAtSemi) 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip this token. 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isFirstTokenSkipped = false; 186a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump } 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Scope manipulation 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// EnterScope - Start a new scope. 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::EnterScope(unsigned ScopeFlags) { 1959e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes) { 1969e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *N = ScopeCache[--NumCachedScopes]; 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer N->Init(CurScope, ScopeFlags); 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = N; 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = new Scope(CurScope, ScopeFlags); 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExitScope - Pop a scope off the scope stack. 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ExitScope() { 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope && "Scope imbalance!"); 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 20890ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // Inform the actions module that this scope is going away if there are any 20990ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // decls in it. 21090ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner if (!CurScope->decl_empty()) 211b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnPopScope(Tok.getLocation(), CurScope); 212a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2139e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *OldScope = CurScope; 2149e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner CurScope = OldScope->getParent(); 215a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2169e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes == ScopeCacheSize) 2179e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete OldScope; 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 2199e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner ScopeCache[NumCachedScopes++] = OldScope; 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// C99 6.9: External Definitions. 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::~Parser() { 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we still have scopes active, delete the scope tree. 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete CurScope; 232a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Free the scope cache. 2349e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner for (unsigned i = 0, e = NumCachedScopes; i != e; ++i) 2359e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete ScopeCache[i]; 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Initialize - Warm up the parser. 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::Initialize() { 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Prime the lexer look-ahead. 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 243a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 24431e057270232c1c37602579cb6461c2704175672Chris Lattner // Create the translation unit scope. Install it as the current scope. 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope == 0 && "A scope is already active?"); 24631e057270232c1c37602579cb6461c2704175672Chris Lattner EnterScope(Scope::DeclScope); 247b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnTranslationUnitScope(Tok.getLocation(), CurScope); 248a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 249000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::eof) && 250f72617544287acf0281c3b1a733bcb22a02e6ca4Chris Lattner !getLang().CPlusPlus) // Empty source file is an extension in C 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_empty_source_file); 252a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 25334870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner // Initialization for Objective-C context sensitive keywords recognition. 254a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek // Referenced in Parser::ParseObjCTypeQualifierList. 25534870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner if (getLang().ObjC1) { 256a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in"); 257a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out"); 258a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout"); 259a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway"); 260a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy"); 261a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref"); 26234870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner } 263d0f97d1716a138a8d9e0df8e5af77334663723d8Fariborz Jahanian if (getLang().ObjC2) { 264a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_readonly] = &PP.getIdentifierTable().get("readonly"); 265a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_getter] = &PP.getIdentifierTable().get("getter"); 266a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_setter] = &PP.getIdentifierTable().get("setter"); 267a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_assign] = &PP.getIdentifierTable().get("assign"); 268a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump ObjCPropertyAttrs[objc_readwrite] = 269d0f97d1716a138a8d9e0df8e5af77334663723d8Fariborz Jahanian &PP.getIdentifierTable().get("readwrite"); 270a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_retain] = &PP.getIdentifierTable().get("retain"); 271a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCPropertyAttrs[objc_copy] = &PP.getIdentifierTable().get("copy"); 272a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump ObjCPropertyAttrs[objc_nonatomic] = 273d0f97d1716a138a8d9e0df8e5af77334663723d8Fariborz Jahanian &PP.getIdentifierTable().get("nonatomic"); 274d0f97d1716a138a8d9e0df8e5af77334663723d8Fariborz Jahanian } 275662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar 276662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar Ident_super = &PP.getIdentifierTable().get("super"); 2775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTopLevelDecl - Parse one top-level declaration, return whatever the 2805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// action tells us to. This returns true if the EOF was encountered. 28189307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroffbool Parser::ParseTopLevelDecl(DeclTy*& Result) { 28289307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = 0; 2839299f3fa85796613cc787a2062c9562d07c8613eChris Lattner if (Tok.is(tok::eof)) { 2849299f3fa85796613cc787a2062c9562d07c8613eChris Lattner Actions.ActOnEndOfTranslationUnit(); 2859299f3fa85796613cc787a2062c9562d07c8613eChris Lattner return true; 2869299f3fa85796613cc787a2062c9562d07c8613eChris Lattner } 287a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 28889307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = ParseExternalDeclaration(); 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 2905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTranslationUnit: 2935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// translation-unit: [C99 6.9] 294a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// external-declaration 295a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// translation-unit external-declaration 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseTranslationUnit() { 297a9e8fec80088f4e176d80b84bddddfbc9ab0f548Chris Lattner Initialize(); // pushes a scope. 298a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 29989307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff DeclTy *Res; 30089307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff while (!ParseTopLevelDecl(Res)) 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /*parse them all*/; 30206f548596beef4c0a227a45cba996497f99566c0Chris Lattner 30306f548596beef4c0a227a45cba996497f99566c0Chris Lattner ExitScope(); 30406f548596beef4c0a227a45cba996497f99566c0Chris Lattner assert(CurScope == 0 && "Scope imbalance!"); 3055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseExternalDeclaration: 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// external-declaration: [C99 6.9] 309c3018153a11afe91849748a93d920040a571b76cChris Lattner/// function-definition 310c3018153a11afe91849748a93d920040a571b76cChris Lattner/// declaration 3115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [EXT] ';' 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition 313c3018153a11afe91849748a93d920040a571b76cChris Lattner/// [GNU] __extension__ external-declaration 3145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-definition 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-declaration 3165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-alias-declaration 3175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-protocol-definition 3185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-method-definition 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] @end 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition: 3225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// simple-asm-expr ';' 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseExternalDeclaration() { 3255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 3265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 3275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_top_level_semi); 3285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Invoke action for top-level semicolon. 3305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 331c3018153a11afe91849748a93d920040a571b76cChris Lattner case tok::kw___extension__: { 332c3018153a11afe91849748a93d920040a571b76cChris Lattner ConsumeToken(); 333c3018153a11afe91849748a93d920040a571b76cChris Lattner // FIXME: Disable extension warnings. 334c3018153a11afe91849748a93d920040a571b76cChris Lattner DeclTy *RV = ParseExternalDeclaration(); 335c3018153a11afe91849748a93d920040a571b76cChris Lattner // FIXME: Restore extension warnings. 336c3018153a11afe91849748a93d920040a571b76cChris Lattner return RV; 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? 4275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DeclaratorInfo.getIdentifier() == 0) { 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 440000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::kw___attribute)) { // int X() __attr__ -> not a function def 4415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 4425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (DeclaratorInfo.isFunctionDeclarator() && 443cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis (Tok.is(tok::l_brace) || // int X() {} 444cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis ( !getLang().CPlusPlus && 445cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis isDeclarationSpecifier() ))) { // int X(f) int f; {} 446e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 447e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff Diag(Tok, diag::err_function_declared_typedef); 448a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 449e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (Tok.is(tok::l_brace)) { 450e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // This recovery skips the entire function body. It would be nice 451a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump // to simply call ParseFunctionDefintion() below, however Sema 452e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // assumes the declarator represents a function, not a typedef. 453e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff ConsumeBrace(); 454e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::r_brace, true); 455e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } else { 456e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::semi); 457e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 458e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff return 0; 459e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 4605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseFunctionDefinition(DeclaratorInfo); 4615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 4625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DeclaratorInfo.isFunctionDeclarator()) 4635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 4645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 4655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_after_declarator); 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi); 4675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the init-declarator-list for a normal declaration. 4715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo); 4725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseFunctionDefinition - We parsed and verified that the specified 4755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Declarator is well formed. If this is a K&R-style function, read the 4765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// parameters declaration-list, then start the compound-statement. 4775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 478a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// function-definition: [C99 6.9.1] 479a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 480a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 481a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 4825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 4835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseFunctionDefinition(Declarator &D) { 4845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0); 4855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(FnTypeInfo.Kind == DeclaratorChunk::Function && 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "This isn't a function declarator!"); 4875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun; 488a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 489a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // If this is C90 and the declspecs were completely missing, fudge in an 490a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // implicit int. We do this here because this is the only place where 491a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // declaration-specifiers are completely optional in the grammar. 492d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner if (getLang().ImplicitInt && D.getDeclSpec().getParsedSpecifiers() == 0) { 493a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner const char *PrevSpec; 494985abd958d83e4f109a15451440f1d008ae45f59Chris Lattner D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int, D.getIdentifierLoc(), 495a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner PrevSpec); 496a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner } 497a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 4985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this declaration was formed with a K&R-style identifier list for the 4995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // arguments, parse declarations for all of the args next. 5005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // int foo(a,b) int a; float b; {} 5015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!FTI.hasPrototype && FTI.NumArgs != 0) 5025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseKNRParamDeclarations(D); 5035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We should have an opening brace now. 505000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_brace)) { 5065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 5075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over garbage, until we get to '{'. Don't eat the '{'. 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::l_brace, true, true); 510a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we didn't find the '{', bail out. 512000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_brace)) 5135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 5145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 515a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 516b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner SourceLocation BraceLoc = Tok.getLocation(); 517a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 518b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Enter a scope for the function body. 519b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner EnterScope(Scope::FnScope|Scope::DeclScope); 520a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 521b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Tell the actions module that we have entered a function definition with the 522b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // specified Declarator for the function. 523b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner DeclTy *Res = Actions.ActOnStartOfFunctionDef(CurScope, D); 524a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 525a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump return ParseFunctionStatementBody(Res, BraceLoc, BraceLoc); 5265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides 5295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// types for a function with a K&R-style identifier list for arguments. 5305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseKNRParamDeclarations(Declarator &D) { 5315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that the top-level of this declarator is a function. 5325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; 5335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 53404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Enter function-declaration scope, limiting any declarators to the 53504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // function prototype scope, including parameter declarators. 5366e33dd5b5cbaddadd54bebe07c8397844365d885Eli Friedman EnterScope(Scope::FnScope|Scope::DeclScope); 53704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 5385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read all the argument declarations. 5395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (isDeclarationSpecifier()) { 5405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation DSStart = Tok.getLocation(); 541a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 5445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 545a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: 'each declaration in the declaration list shall have at 5475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // least one declarator'. 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // NOTE: GCC just makes this an ext-warn. It's not clear what it does with 5495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the declarations though. It's trivial to ignore them, really hard to do 5505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // anything else with them. 551000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 5525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DSStart, diag::err_declaration_does_not_declare_param); 5535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 5545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 5555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 556a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other 5585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // than register. 5595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && 5605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getStorageClassSpec() != DeclSpec::SCS_register) { 5615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getStorageClassSpecLoc(), 5625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 5635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 5645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.isThreadSpecified()) { 5665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getThreadSpecLoc(), 5675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 5685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 5695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 570a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator attached to this declspec. 5725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext); 5735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Handle the full declarator list. 5765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 5775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclTy *AttrList; 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If attributes are present, parse them. 579000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::kw___attribute)) 5805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: attach attributes too. 5815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AttrList = ParseAttributes(); 582a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ask the actions module to compute the type for this declarator. 584a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump Action::DeclTy *Param = 58504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Actions.ActOnParamDeclarator(CurScope, ParmDeclarator); 5862bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff 587a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump if (Param && 5885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // A missing identifier has already been diagnosed. 5895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()) { 5905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan the argument list looking for the correct param to apply this 5925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // type. 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; ; ++i) { 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: those declarators shall declare only identifiers from 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the identifier list. 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (i == FTI.NumArgs) { 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param, 5985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()->getName()); 5995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 601a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) { 6035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reject redefinitions of parameters. 60404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner if (FTI.ArgInfo[i].Param) { 6055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ParmDeclarator.getIdentifierLoc(), 6065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_param_redefinition, 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()->getName()); 6085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 60904421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner FTI.ArgInfo[i].Param = Param; 6105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we don't have a comma, it is either the end of the list (a ';') or 6175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // an error, bail out. 618000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::comma)) 6195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 620a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Consume the comma. 6225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 623a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the next declarator. 6255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.clear(); 6265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 6275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 628a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 629000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 6305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 6325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_parse_error); 6335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip to end of block or statement 6345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi, true); 635000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 6365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 639a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 64004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Leave prototype scope. 64104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner ExitScope(); 64204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 6435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The actions module must verify that all arguments were declared. 6445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseAsmStringLiteral - This is just a normal string-literal, but is not 6485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// allowed to be a wide string, and is not subject to character translation. 6495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-string-literal: 6515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal 6525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6536a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders CarlssonParser::ExprResult Parser::ParseAsmStringLiteral() { 6545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isTokenStringLiteral()) { 6555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_string_literal); 6566a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson return true; 6575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 658a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ExprResult Res = ParseStringLiteralExpression(); 6606a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson if (Res.isInvalid) return true; 661a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Diagnose: wide string literal in 'asm' 663a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6646a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson return Res; 6655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseSimpleAsm 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] simple-asm-expr: 6705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 'asm' '(' asm-string-literal ')' 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 672dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders CarlssonParser::ExprResult Parser::ParseSimpleAsm() { 673000732226610650837478cba97843d19b75f648eChris Lattner assert(Tok.is(tok::kw_asm) && "Not an asm!"); 674dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson SourceLocation Loc = ConsumeToken(); 675a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 676000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_paren)) { 6775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_lparen_after, "asm"); 678aec3a1eb215445e63ba5702f8d6b1e0f2e8c27b9Chris Lattner return true; 6795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 680a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 681dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ConsumeParen(); 682a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 683dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ExprResult Result = ParseAsmStringLiteral(); 684a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 685a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar if (Result.isInvalid) { 686a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar SkipUntil(tok::r_paren); 687a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar } else { 688a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar MatchRHSPunctuation(tok::r_paren, Loc); 689a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar } 690a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 691dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson return Result; 6925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 694