Parser.cpp revision 6898e33d0b28346a4dbe9a666e0e4188fea80460
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 441ab3b96de160e4fbffec2a776e284a48a3bb543dChris LattnerDiagnosticInfo Parser::Diag(SourceLocation Loc, unsigned DiagID) { 451ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner return Diags.Report(FullSourceLoc(Loc,PP.getSourceManager()), DiagID); 461ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner} 471ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner 481ab3b96de160e4fbffec2a776e284a48a3bb543dChris LattnerDiagnosticInfo Parser::Diag(const Token &Tok, unsigned DiagID) { 491ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner return Diag(Tok.getLocation(), DiagID); 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// MatchRHSPunctuation - For punctuation with a LHS and RHS (e.g. '['/']'), 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// this helper function matches and consumes the specified RHS token if 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// present. If not present, it emits the specified diagnostic indicating 555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the parser failed to match the RHS of the token at LHSLoc. LHSName 565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// should be the name of the unmatched LHS token. 575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerSourceLocation Parser::MatchRHSPunctuation(tok::TokenKind RHSTok, 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation LHSLoc) { 59a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 60000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(RHSTok)) 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ConsumeAnyToken(); 62a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation R = Tok.getLocation(); 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *LHSName = "unknown"; 655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::kind DID = diag::err_parse_error; 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (RHSTok) { 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: break; 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break; 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break; 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break; 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greater: LHSName = "<"; DID = diag::err_expected_greater; break; 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, DID); 741ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(LHSLoc, diag::err_matching) << LHSName; 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(RHSTok); 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return R; 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// input. If so, it is consumed and false is returned. 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If the input is malformed, this emits the specified diagnostic. Next, if 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// returned. 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID, 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *Msg, tok::TokenKind SkipToTok) { 87000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(ExpectedTok)) { 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 91a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 921ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(Tok, DiagID) << Msg; 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (SkipToTok != tok::unknown) 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(SkipToTok); 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Error recovery. 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipUntil - Read tokens until we get to the specified token, then consume 103012cf464254804279efa84e21b4b493dde76c5f1Chris Lattner/// it (unless DontConsume is true). Because we cannot guarantee that the 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// token will ever occur, this skips to the next token, or to some likely 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// good stopping point. If StopAtSemi is true, skipping will stop at a ';' 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character. 107a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If SkipUntil finds the specified token, it returns true, otherwise it 109a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// returns false. 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::SkipUntil(const tok::TokenKind *Toks, unsigned NumToks, 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool StopAtSemi, bool DontConsume) { 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We always want this function to skip at least one token if the first token 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // isn't T and if not at EOF. 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isFirstTokenSkipped = true; 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we found one of the tokens, stop and return true. 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; i != NumToks; ++i) { 118000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(Toks[i])) { 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DontConsume) { 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Noop, don't consume the token. 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 127a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::eof: 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ran out of tokens. 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 132a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_paren: 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested parens. 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_paren, false); 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_square: 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested square brackets. 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_square, false); 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_brace: 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested braces. 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_brace, false); 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 148a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Okay, we found a ']' or '}' or ')', which we think should be balanced. 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Since the user wasn't looking for this token (if they were, it would 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // already be handled), this isn't balanced. If there is a LHS token at a 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // higher level, we will assume that this matches the unbalanced token 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and return it. Otherwise, this is a spurious RHS token, which we skip. 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren: 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ParenCount && !isFirstTokenSkipped) 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BracketCount && !isFirstTokenSkipped) 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace: 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BraceCount && !isFirstTokenSkipped) 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 169a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::string_literal: 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::wide_string_literal: 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeStringToken(); 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StopAtSemi) 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip this token. 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isFirstTokenSkipped = false; 184a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump } 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Scope manipulation 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// EnterScope - Start a new scope. 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::EnterScope(unsigned ScopeFlags) { 1939e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes) { 1949e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *N = ScopeCache[--NumCachedScopes]; 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer N->Init(CurScope, ScopeFlags); 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = N; 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = new Scope(CurScope, ScopeFlags); 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExitScope - Pop a scope off the scope stack. 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ExitScope() { 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope && "Scope imbalance!"); 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 20690ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // Inform the actions module that this scope is going away if there are any 20790ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // decls in it. 20890ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner if (!CurScope->decl_empty()) 209b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnPopScope(Tok.getLocation(), CurScope); 210a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2119e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *OldScope = CurScope; 2129e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner CurScope = OldScope->getParent(); 213a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2149e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes == ScopeCacheSize) 2159e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete OldScope; 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 2179e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner ScopeCache[NumCachedScopes++] = OldScope; 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// C99 6.9: External Definitions. 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::~Parser() { 2285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we still have scopes active, delete the scope tree. 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete CurScope; 230a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Free the scope cache. 2329e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner for (unsigned i = 0, e = NumCachedScopes; i != e; ++i) 2339e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete ScopeCache[i]; 234fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 235fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // Remove the pragma handlers we installed. 236fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar PP.RemovePragmaHandler(0, PackHandler); 237fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar delete PackHandler; 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Initialize - Warm up the parser. 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::Initialize() { 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Prime the lexer look-ahead. 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 245a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 24631e057270232c1c37602579cb6461c2704175672Chris Lattner // Create the translation unit scope. Install it as the current scope. 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope == 0 && "A scope is already active?"); 24831e057270232c1c37602579cb6461c2704175672Chris Lattner EnterScope(Scope::DeclScope); 249b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnTranslationUnitScope(Tok.getLocation(), CurScope); 250a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 251000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::eof) && 252f72617544287acf0281c3b1a733bcb22a02e6ca4Chris Lattner !getLang().CPlusPlus) // Empty source file is an extension in C 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_empty_source_file); 254a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 25534870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner // Initialization for Objective-C context sensitive keywords recognition. 256a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek // Referenced in Parser::ParseObjCTypeQualifierList. 25734870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner if (getLang().ObjC1) { 258a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in"); 259a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out"); 260a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout"); 261a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway"); 262a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy"); 263a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref"); 26434870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner } 265662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar 266662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar Ident_super = &PP.getIdentifierTable().get("super"); 2675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTopLevelDecl - Parse one top-level declaration, return whatever the 2705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// action tells us to. This returns true if the EOF was encountered. 27189307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroffbool Parser::ParseTopLevelDecl(DeclTy*& Result) { 27289307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = 0; 2739299f3fa85796613cc787a2062c9562d07c8613eChris Lattner if (Tok.is(tok::eof)) { 2749299f3fa85796613cc787a2062c9562d07c8613eChris Lattner Actions.ActOnEndOfTranslationUnit(); 2759299f3fa85796613cc787a2062c9562d07c8613eChris Lattner return true; 2769299f3fa85796613cc787a2062c9562d07c8613eChris Lattner } 277a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 27889307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = ParseExternalDeclaration(); 2795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 2805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTranslationUnit: 2835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// translation-unit: [C99 6.9] 284a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// external-declaration 285a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// translation-unit external-declaration 2865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseTranslationUnit() { 287a9e8fec80088f4e176d80b84bddddfbc9ab0f548Chris Lattner Initialize(); // pushes a scope. 288a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 28989307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff DeclTy *Res; 29089307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff while (!ParseTopLevelDecl(Res)) 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /*parse them all*/; 29206f548596beef4c0a227a45cba996497f99566c0Chris Lattner 29306f548596beef4c0a227a45cba996497f99566c0Chris Lattner ExitScope(); 29406f548596beef4c0a227a45cba996497f99566c0Chris Lattner assert(CurScope == 0 && "Scope imbalance!"); 2955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseExternalDeclaration: 2985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// external-declaration: [C99 6.9] 299c3018153a11afe91849748a93d920040a571b76cChris Lattner/// function-definition 300c3018153a11afe91849748a93d920040a571b76cChris Lattner/// declaration 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [EXT] ';' 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition 303c3018153a11afe91849748a93d920040a571b76cChris Lattner/// [GNU] __extension__ external-declaration 3045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-definition 3055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-declaration 3065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-alias-declaration 3075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-protocol-definition 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-method-definition 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] @end 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition: 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// simple-asm-expr ';' 3135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseExternalDeclaration() { 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 3165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 3175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_top_level_semi); 3185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Invoke action for top-level semicolon. 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 321c3018153a11afe91849748a93d920040a571b76cChris Lattner case tok::kw___extension__: { 322c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner // __extension__ silences extension warnings in the subexpression. 323c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner ExtensionRAIIObject O(Diags); // Use RAII to do this. 32439146d6497ad5e7ca8ef639221e7b3e15d07c888Chris Lattner ConsumeToken(); 325c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner return ParseExternalDeclaration(); 326c3018153a11afe91849748a93d920040a571b76cChris Lattner } 327dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson case tok::kw_asm: { 328dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ExprResult Result = ParseSimpleAsm(); 329a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 3303f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 3313f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson "top-level asm block"); 332dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson 333dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson if (!Result.isInvalid) 334dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson return Actions.ActOnFileScopeAsmDecl(Tok.getLocation(), Result.Val); 335aec3a1eb215445e63ba5702f8d6b1e0f2e8c27b9Chris Lattner return 0; 336dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson } 3375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::at: 3385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // @ is not a legal token unless objc is enabled, no need to check. 3392bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff return ParseObjCAtDirectives(); 3405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::minus: 3415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::plus: 34260fbca0b027ff5a6579f16cb6e3abab826e0d967Fariborz Jahanian if (getLang().ObjC1) 34371c0a951d08dc7a2a057df8c15f22b36f6aa47c7Steve Naroff return ParseObjCMethodDefinition(); 34460fbca0b027ff5a6579f16cb6e3abab826e0d967Fariborz Jahanian else { 3455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_external_declaration); 3465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 3498f08cb7d0b97786b17ef05e05caa55aad4d6bd39Chris Lattner case tok::kw_namespace: 3505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::kw_typedef: 351bae35118fc5cea2da08567dbb9763af7f906dae2Chris Lattner // A function definition cannot start with a these keywords. 3525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclaration(Declarator::FileContext); 3535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 3545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We can't tell whether this is a function-definition or declaration yet. 3555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclarationOrFunctionDefinition(); 3565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or 3605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a declaration. We can't tell which we have until we read up to the 3615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// compound-statement in function-definition. 3625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// function-definition: [C99 6.9.1] 364a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 365a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 366a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 367a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// 3685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// declaration: [C99 6.7] 369697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// declaration-specifiers init-declarator-list[opt] ';' 370697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// [!C99] init-declarator-list ';' [TODO: warn in c99 mode] 3715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OMP] threadprivate-directive [TODO] 3725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseDeclarationOrFunctionDefinition() { 3745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 3755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 3765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 377a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 3785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 3795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // declaration-specifiers init-declarator-list[opt] ';' 380000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 3815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 3835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 384a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 385246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // ObjC2 allows prefix attributes on class interfaces and protocols. 386246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // FIXME: This still needs better diagnostics. We should only accept 387246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // attributes here, no types, etc. 388000732226610650837478cba97843d19b75f648eChris Lattner if (getLang().ObjC2 && Tok.is(tok::at)) { 389dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff SourceLocation AtLoc = ConsumeToken(); // the "@" 390246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (!Tok.isObjCAtKeyword(tok::objc_interface) && 391246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar !Tok.isObjCAtKeyword(tok::objc_protocol)) { 392246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar Diag(Tok, diag::err_objc_unexpected_attr); 393cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner SkipUntil(tok::semi); // FIXME: better skip? 394cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner return 0; 395cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner } 3960de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian const char *PrevSpec = 0; 3970de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec)) 3981ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(AtLoc, diag::err_invalid_decl_spec_combination) << PrevSpec; 399246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (Tok.isObjCAtKeyword(tok::objc_protocol)) 400246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes()); 401a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump return ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()); 402dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff } 403a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 404c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // If the declspec consisted only of 'extern' and we have a string 405c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // literal following it, this must be a C++ linkage specifier like 406c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // 'extern "C"'. 4073c6f6a7a1bb9969112617a26d2333bab2f6efd65Chris Lattner if (Tok.is(tok::string_literal) && getLang().CPlusPlus && 408c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getStorageClassSpec() == DeclSpec::SCS_extern && 409c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) 410c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner return ParseLinkage(Declarator::FileContext); 411c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 4125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator. 4135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator DeclaratorInfo(DS, Declarator::FileContext); 4145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(DeclaratorInfo); 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Error parsing the declarator? 41610bd36882406cdf4805e35add1ce2f11ab9ae152Douglas Gregor if (!DeclaratorInfo.hasName()) { 4175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If so, skip until the semi-colon or a }. 4185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_brace, true); 419000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 4205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 4215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the declarator is the start of a function definition, handle it. 425000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::equal) || // int X()= -> not a function def 426000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::comma) || // int X(), -> not a function def 427000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::semi) || // int X(); -> not a function def 428000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def 42973a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def 43073a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis (getLang().CPlusPlus && 43173a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis Tok.is(tok::l_paren)) ) { // int X(0) -> not a function def [C++] 4325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 4335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (DeclaratorInfo.isFunctionDeclarator() && 434cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis (Tok.is(tok::l_brace) || // int X() {} 435cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis ( !getLang().CPlusPlus && 436cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis isDeclarationSpecifier() ))) { // int X(f) int f; {} 437e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 438e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff Diag(Tok, diag::err_function_declared_typedef); 439a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 440e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (Tok.is(tok::l_brace)) { 441e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // This recovery skips the entire function body. It would be nice 442a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump // to simply call ParseFunctionDefintion() below, however Sema 443e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // assumes the declarator represents a function, not a typedef. 444e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff ConsumeBrace(); 445e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::r_brace, true); 446e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } else { 447e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::semi); 448e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 449e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff return 0; 450e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 4515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseFunctionDefinition(DeclaratorInfo); 4525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 4535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DeclaratorInfo.isFunctionDeclarator()) 4545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 4555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 4565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_after_declarator); 4575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi); 4585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the init-declarator-list for a normal declaration. 4625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo); 4635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseFunctionDefinition - We parsed and verified that the specified 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Declarator is well formed. If this is a K&R-style function, read the 4675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// parameters declaration-list, then start the compound-statement. 4685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 469a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// function-definition: [C99 6.9.1] 470a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 471a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 472a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 4737ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 4747ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// decl-specifier-seq[opt] declarator ctor-initializer[opt] function-body 4757ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 4767ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// decl-specifier-seq[opt] declarator function-try-block [TODO] 4775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 4785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseFunctionDefinition(Declarator &D) { 4795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0); 4805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(FnTypeInfo.Kind == DeclaratorChunk::Function && 4815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "This isn't a function declarator!"); 4825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun; 483a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 484a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // If this is C90 and the declspecs were completely missing, fudge in an 485a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // implicit int. We do this here because this is the only place where 486a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // declaration-specifiers are completely optional in the grammar. 487d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner if (getLang().ImplicitInt && D.getDeclSpec().getParsedSpecifiers() == 0) { 488a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner const char *PrevSpec; 48931c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int, 49031c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getIdentifierLoc(), 49131c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner PrevSpec); 492a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner } 493a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 4945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this declaration was formed with a K&R-style identifier list for the 4955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // arguments, parse declarations for all of the args next. 4965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // int foo(a,b) int a; float b; {} 4975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!FTI.hasPrototype && FTI.NumArgs != 0) 4985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseKNRParamDeclarations(D); 4995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5007ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (getLang().CPlusPlus && Tok.is(tok::colon)) { 5017ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor 5027ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor } 5037ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor 5047ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // We should have either an opening brace or, in a C++ constructor, 5057ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // we may have a colon. 5067ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (Tok.isNot(tok::l_brace) && Tok.isNot(tok::colon)) { 5075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over garbage, until we get to '{'. Don't eat the '{'. 5105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::l_brace, true, true); 511a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we didn't find the '{', bail out. 513000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_brace)) 5145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 5155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 516a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 517b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Enter a scope for the function body. 518b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner EnterScope(Scope::FnScope|Scope::DeclScope); 519a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 520b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Tell the actions module that we have entered a function definition with the 521b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // specified Declarator for the function. 522b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner DeclTy *Res = Actions.ActOnStartOfFunctionDef(CurScope, D); 523a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5247ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // If we have a colon, then we're probably parsing a C++ 5257ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // ctor-initializer. 5267ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (Tok.is(tok::colon)) 5277ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor ParseConstructorInitializer(Res); 5287ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor 5297ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor SourceLocation BraceLoc = Tok.getLocation(); 530a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump return ParseFunctionStatementBody(Res, BraceLoc, BraceLoc); 5315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides 5345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// types for a function with a K&R-style identifier list for arguments. 5355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseKNRParamDeclarations(Declarator &D) { 5365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that the top-level of this declarator is a function. 5375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; 5385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 53904421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Enter function-declaration scope, limiting any declarators to the 54004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // function prototype scope, including parameter declarators. 5416e33dd5b5cbaddadd54bebe07c8397844365d885Eli Friedman EnterScope(Scope::FnScope|Scope::DeclScope); 54204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read all the argument declarations. 5445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (isDeclarationSpecifier()) { 5455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation DSStart = Tok.getLocation(); 546a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 5495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 550a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: 'each declaration in the declaration list shall have at 5525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // least one declarator'. 5535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // NOTE: GCC just makes this an ext-warn. It's not clear what it does with 5545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the declarations though. It's trivial to ignore them, really hard to do 5555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // anything else with them. 556000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 5575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DSStart, diag::err_declaration_does_not_declare_param); 5585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 5595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 5605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 561a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other 5635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // than register. 5645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && 5655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getStorageClassSpec() != DeclSpec::SCS_register) { 5665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getStorageClassSpecLoc(), 5675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 5685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 5695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.isThreadSpecified()) { 5715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getThreadSpecLoc(), 5725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 5735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 575a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator attached to this declspec. 5775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext); 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 5795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Handle the full declarator list. 5815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 5825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclTy *AttrList; 5835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If attributes are present, parse them. 584000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::kw___attribute)) 5855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: attach attributes too. 5865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AttrList = ParseAttributes(); 587a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ask the actions module to compute the type for this declarator. 589a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump Action::DeclTy *Param = 59004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Actions.ActOnParamDeclarator(CurScope, ParmDeclarator); 5912bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff 592a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump if (Param && 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // A missing identifier has already been diagnosed. 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()) { 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan the argument list looking for the correct param to apply this 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // type. 5985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; ; ++i) { 5995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: those declarators shall declare only identifiers from 6005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the identifier list. 6015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (i == FTI.NumArgs) { 6021ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param) 6036898e33d0b28346a4dbe9a666e0e4188fea80460Chris Lattner << ParmDeclarator.getIdentifier(); 6045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 606a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) { 6085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reject redefinitions of parameters. 60904421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner if (FTI.ArgInfo[i].Param) { 6105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ParmDeclarator.getIdentifierLoc(), 6111ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner diag::err_param_redefinition) 6126898e33d0b28346a4dbe9a666e0e4188fea80460Chris Lattner << ParmDeclarator.getIdentifier(); 6135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 61404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner FTI.ArgInfo[i].Param = Param; 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we don't have a comma, it is either the end of the list (a ';') or 6225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // an error, bail out. 623000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::comma)) 6245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 625a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Consume the comma. 6275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 628a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the next declarator. 6305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.clear(); 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 6325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 633a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 634000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 6355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 6375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_parse_error); 6385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip to end of block or statement 6395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi, true); 640000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 6415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 644a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 64504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Leave prototype scope. 64604421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner ExitScope(); 64704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 6485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The actions module must verify that all arguments were declared. 6495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseAsmStringLiteral - This is just a normal string-literal, but is not 6535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// allowed to be a wide string, and is not subject to character translation. 6545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-string-literal: 6565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal 6575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6586a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders CarlssonParser::ExprResult Parser::ParseAsmStringLiteral() { 6595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isTokenStringLiteral()) { 6605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_string_literal); 6616a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson return true; 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 663a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ExprResult Res = ParseStringLiteralExpression(); 6656a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson if (Res.isInvalid) return true; 666a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Diagnose: wide string literal in 'asm' 668a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6696a0ef4b83c91a6d6d5acb4ed5577c4659fe022a3Anders Carlsson return Res; 6705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseSimpleAsm 6735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] simple-asm-expr: 6755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 'asm' '(' asm-string-literal ')' 6765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 677dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders CarlssonParser::ExprResult Parser::ParseSimpleAsm() { 678000732226610650837478cba97843d19b75f648eChris Lattner assert(Tok.is(tok::kw_asm) && "Not an asm!"); 679dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson SourceLocation Loc = ConsumeToken(); 680a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 681000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_paren)) { 6821ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(Tok, diag::err_expected_lparen_after) << "asm"; 683aec3a1eb215445e63ba5702f8d6b1e0f2e8c27b9Chris Lattner return true; 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 685a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 686dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ConsumeParen(); 687a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 688dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ExprResult Result = ParseAsmStringLiteral(); 689a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6908f5421a2cfaff0b5ef93a4116f697ed98ce08828Chris Lattner if (Result.isInvalid) 691a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar SkipUntil(tok::r_paren); 6928f5421a2cfaff0b5ef93a4116f697ed98ce08828Chris Lattner else 693a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar MatchRHSPunctuation(tok::r_paren, Loc); 694a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 695dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson return Result; 6965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 698eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateTypeOrScopeToken - If the current token position is on a 699eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typename (possibly qualified in C++) or a C++ scope specifier not followed 700eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens 701eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// with a single annotation token representing the typename or C++ scope 702eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// respectively. 703eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// This simplifies handling of C++ scope specifiers and allows efficient 704eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// backtracking without the need to re-parse and resolve nested-names and 705eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typenames. 706eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidisvoid Parser::TryAnnotateTypeOrScopeToken() { 707eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::annot_qualtypename) || Tok.is(tok::annot_cxxscope)) 708eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis return; 709eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 710eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis CXXScopeSpec SS; 711eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (isTokenCXXScopeSpecifier()) 712eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis ParseCXXScopeSpecifier(SS); 713eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 714eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::identifier)) { 715eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis TypeTy *Ty = Actions.isTypeName(*Tok.getIdentifierInfo(), CurScope, &SS); 716eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Ty) { 717eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // This is a typename. Replace the current token in-place with an 718eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // annotation type token. 719eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setKind(tok::annot_qualtypename); 720eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationValue(Ty); 721eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationEndLoc(Tok.getLocation()); 722eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (SS.isNotEmpty()) // it was a C++ qualified type name. 723eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setLocation(SS.getBeginLoc()); 724eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 725eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // In case the tokens were cached, have Preprocessor replace them with the 726eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // annotation token. 727eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.AnnotateCachedTokens(Tok); 728eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis return; 729eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 730eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 731eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 732eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (SS.isNotEmpty()) { 733eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // A C++ scope specifier that isn't followed by a typename. 734eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // Push the current token back into the token stream and use an annotation 735eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // scope token for current token. 736eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.EnterToken(Tok); 737eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setKind(tok::annot_cxxscope); 738eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationValue(SS.getScopeRep()); 739eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationRange(SS.getRange()); 740eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 741eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // In case the tokens were cached, have Preprocessor replace them with the 742eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // annotation token. 743eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.AnnotateCachedTokens(Tok); 744eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 745eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 746eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 747eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only 748eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// annotates C++ scope specifiers. 749eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidisvoid Parser::TryAnnotateScopeToken() { 750eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::annot_cxxscope)) 751eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis return; 752eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 753eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (isTokenCXXScopeSpecifier()) { 754eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis CXXScopeSpec SS; 755eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis ParseCXXScopeSpecifier(SS); 756eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 757eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // Push the current token back into the token stream and use an annotation 758eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // scope token for current token. 759eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.EnterToken(Tok); 760eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setKind(tok::annot_cxxscope); 761eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationValue(SS.getScopeRep()); 762eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis Tok.setAnnotationRange(SS.getRange()); 763eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 764eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // In case the tokens were cached, have Preprocessor replace them with the 765eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis // annotation token. 766eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis PP.AnnotateCachedTokens(Tok); 767eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 768eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 769