Parser.cpp revision be109b3e768b70f9efb106d25d6b5a2c72c5a9b8
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. 417f792faf0cee47fa1ea304bd7a7f502c0e5bbc9aSebastian RedlActionBase::~ActionBase() {} 427f792faf0cee47fa1ea304bd7a7f502c0e5bbc9aSebastian Redl 437f792faf0cee47fa1ea304bd7a7f502c0e5bbc9aSebastian Redl/// Out-of-line virtual destructor to provide home for Action class. 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::~Action() {} 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 46f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor// Defined out-of-line here because of dependecy on AttributeList 47f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas GregorAction::DeclTy *Action::ActOnUsingDirective(Scope *CurScope, 48f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor SourceLocation UsingLoc, 49f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor SourceLocation NamespcLoc, 50f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor const CXXScopeSpec &SS, 51f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor SourceLocation IdentLoc, 52f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor IdentifierInfo *NamespcName, 53f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor AttributeList *AttrList) { 54f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor 55f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor // FIXME: Parser seems to assume that Action::ActOn* takes ownership over 56f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor // passed AttributeList, however other actions don't free it, is it 57f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor // temporary state or bug? 58f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor delete AttrList; 59f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor return 0; 60f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor} 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 623cbfe2c4159e0a219ae660d50625c013aa4afbd0Chris LattnerDiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) { 631ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner return Diags.Report(FullSourceLoc(Loc,PP.getSourceManager()), DiagID); 641ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner} 651ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner 663cbfe2c4159e0a219ae660d50625c013aa4afbd0Chris LattnerDiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) { 671ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner return Diag(Tok.getLocation(), DiagID); 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// MatchRHSPunctuation - For punctuation with a LHS and RHS (e.g. '['/']'), 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// this helper function matches and consumes the specified RHS token if 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// present. If not present, it emits the specified diagnostic indicating 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the parser failed to match the RHS of the token at LHSLoc. LHSName 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// should be the name of the unmatched LHS token. 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerSourceLocation Parser::MatchRHSPunctuation(tok::TokenKind RHSTok, 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation LHSLoc) { 77a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 78000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(RHSTok)) 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ConsumeAnyToken(); 80a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation R = Tok.getLocation(); 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *LHSName = "unknown"; 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::kind DID = diag::err_parse_error; 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (RHSTok) { 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: break; 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break; 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break; 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break; 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greater: LHSName = "<"; DID = diag::err_expected_greater; break; 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, DID); 9228eb7e992b9a266abb300da25b6d3c1557cec361Chris Lattner Diag(LHSLoc, diag::note_matching) << LHSName; 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(RHSTok); 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return R; 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// input. If so, it is consumed and false is returned. 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If the input is malformed, this emits the specified diagnostic. Next, if 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// returned. 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID, 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *Msg, tok::TokenKind SkipToTok) { 105000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(ExpectedTok)) { 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 109a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1101ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(Tok, DiagID) << Msg; 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (SkipToTok != tok::unknown) 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(SkipToTok); 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Error recovery. 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipUntil - Read tokens until we get to the specified token, then consume 121012cf464254804279efa84e21b4b493dde76c5f1Chris Lattner/// it (unless DontConsume is true). Because we cannot guarantee that the 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// token will ever occur, this skips to the next token, or to some likely 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// good stopping point. If StopAtSemi is true, skipping will stop at a ';' 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character. 125a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If SkipUntil finds the specified token, it returns true, otherwise it 127a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// returns false. 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::SkipUntil(const tok::TokenKind *Toks, unsigned NumToks, 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool StopAtSemi, bool DontConsume) { 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We always want this function to skip at least one token if the first token 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // isn't T and if not at EOF. 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isFirstTokenSkipped = true; 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we found one of the tokens, stop and return true. 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; i != NumToks; ++i) { 136000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(Toks[i])) { 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DontConsume) { 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Noop, don't consume the token. 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 145a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::eof: 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ran out of tokens. 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 150a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_paren: 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested parens. 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_paren, false); 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_square: 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested square brackets. 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_square, false); 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_brace: 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested braces. 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_brace, false); 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 166a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Okay, we found a ']' or '}' or ')', which we think should be balanced. 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Since the user wasn't looking for this token (if they were, it would 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // already be handled), this isn't balanced. If there is a LHS token at a 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // higher level, we will assume that this matches the unbalanced token 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and return it. Otherwise, this is a spurious RHS token, which we skip. 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren: 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ParenCount && !isFirstTokenSkipped) 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BracketCount && !isFirstTokenSkipped) 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace: 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BraceCount && !isFirstTokenSkipped) 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 187a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::string_literal: 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::wide_string_literal: 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeStringToken(); 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StopAtSemi) 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip this token. 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isFirstTokenSkipped = false; 202a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump } 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Scope manipulation 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// EnterScope - Start a new scope. 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::EnterScope(unsigned ScopeFlags) { 2119e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes) { 2129e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *N = ScopeCache[--NumCachedScopes]; 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer N->Init(CurScope, ScopeFlags); 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = N; 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = new Scope(CurScope, ScopeFlags); 2175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExitScope - Pop a scope off the scope stack. 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ExitScope() { 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope && "Scope imbalance!"); 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 22490ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // Inform the actions module that this scope is going away if there are any 22590ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // decls in it. 22690ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner if (!CurScope->decl_empty()) 227b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnPopScope(Tok.getLocation(), CurScope); 228a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2299e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *OldScope = CurScope; 2309e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner CurScope = OldScope->getParent(); 231a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2329e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes == ScopeCacheSize) 2339e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete OldScope; 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 2359e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner ScopeCache[NumCachedScopes++] = OldScope; 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// C99 6.9: External Definitions. 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::~Parser() { 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we still have scopes active, delete the scope tree. 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete CurScope; 248a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Free the scope cache. 2509e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner for (unsigned i = 0, e = NumCachedScopes; i != e; ++i) 2519e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete ScopeCache[i]; 252fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 253fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // Remove the pragma handlers we installed. 254fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar PP.RemovePragmaHandler(0, PackHandler); 255fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar delete PackHandler; 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Initialize - Warm up the parser. 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::Initialize() { 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Prime the lexer look-ahead. 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 263a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 26431e057270232c1c37602579cb6461c2704175672Chris Lattner // Create the translation unit scope. Install it as the current scope. 2655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope == 0 && "A scope is already active?"); 26631e057270232c1c37602579cb6461c2704175672Chris Lattner EnterScope(Scope::DeclScope); 267b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnTranslationUnitScope(Tok.getLocation(), CurScope); 268a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 269000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::eof) && 270f72617544287acf0281c3b1a733bcb22a02e6ca4Chris Lattner !getLang().CPlusPlus) // Empty source file is an extension in C 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_empty_source_file); 272a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 27334870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner // Initialization for Objective-C context sensitive keywords recognition. 274a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek // Referenced in Parser::ParseObjCTypeQualifierList. 27534870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner if (getLang().ObjC1) { 276a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in"); 277a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out"); 278a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout"); 279a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway"); 280a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy"); 281a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref"); 28234870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner } 283662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar 284662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar Ident_super = &PP.getIdentifierTable().get("super"); 2855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTopLevelDecl - Parse one top-level declaration, return whatever the 2885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// action tells us to. This returns true if the EOF was encountered. 28989307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroffbool Parser::ParseTopLevelDecl(DeclTy*& Result) { 29089307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = 0; 2919299f3fa85796613cc787a2062c9562d07c8613eChris Lattner if (Tok.is(tok::eof)) { 2929299f3fa85796613cc787a2062c9562d07c8613eChris Lattner Actions.ActOnEndOfTranslationUnit(); 2939299f3fa85796613cc787a2062c9562d07c8613eChris Lattner return true; 2949299f3fa85796613cc787a2062c9562d07c8613eChris Lattner } 295a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 29689307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = ParseExternalDeclaration(); 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 2985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTranslationUnit: 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// translation-unit: [C99 6.9] 302a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// external-declaration 303a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// translation-unit external-declaration 3045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseTranslationUnit() { 3058935b8b49053122ddd3ab4cd59af0fe5eb9c23cfDouglas Gregor Initialize(); 306a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 30789307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff DeclTy *Res; 30889307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff while (!ParseTopLevelDecl(Res)) 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /*parse them all*/; 31006f548596beef4c0a227a45cba996497f99566c0Chris Lattner 31106f548596beef4c0a227a45cba996497f99566c0Chris Lattner ExitScope(); 31206f548596beef4c0a227a45cba996497f99566c0Chris Lattner assert(CurScope == 0 && "Scope imbalance!"); 3135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseExternalDeclaration: 31690b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner/// 317c19923dda3d28f67aab4726cd40bb07032758383Douglas Gregor/// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl] 318c3018153a11afe91849748a93d920040a571b76cChris Lattner/// function-definition 319c3018153a11afe91849748a93d920040a571b76cChris Lattner/// declaration 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [EXT] ';' 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition 322c3018153a11afe91849748a93d920040a571b76cChris Lattner/// [GNU] __extension__ external-declaration 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-definition 3245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-declaration 3255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-alias-declaration 3265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-protocol-definition 3275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-method-definition 3285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] @end 329c19923dda3d28f67aab4726cd40bb07032758383Douglas Gregor/// [C++] linkage-specification 3305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition: 3315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// simple-asm-expr ';' 3325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseExternalDeclaration() { 3345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 3355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 3365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_top_level_semi); 3375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Invoke action for top-level semicolon. 3395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 34090b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner case tok::r_brace: 34190b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner Diag(Tok, diag::err_expected_external_declaration); 34290b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner ConsumeBrace(); 34390b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner return 0; 34490b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner case tok::eof: 34590b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner Diag(Tok, diag::err_expected_external_declaration); 34690b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner return 0; 347c3018153a11afe91849748a93d920040a571b76cChris Lattner case tok::kw___extension__: { 348c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner // __extension__ silences extension warnings in the subexpression. 349c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner ExtensionRAIIObject O(Diags); // Use RAII to do this. 35039146d6497ad5e7ca8ef639221e7b3e15d07c888Chris Lattner ConsumeToken(); 351c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner return ParseExternalDeclaration(); 352c3018153a11afe91849748a93d920040a571b76cChris Lattner } 353dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson case tok::kw_asm: { 354effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl OwningExprResult Result(ParseSimpleAsm()); 355a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 3563f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 3573f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson "top-level asm block"); 358dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson 3590e9eabca263e8922bec0e2b38c8670eba9a39a1fSebastian Redl if (!Result.isInvalid()) 360f512e82f56671b695a32d019103e62a302838b7eSebastian Redl return Actions.ActOnFileScopeAsmDecl(Tok.getLocation(), move_arg(Result)); 361aec3a1eb215445e63ba5702f8d6b1e0f2e8c27b9Chris Lattner return 0; 362dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson } 3635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::at: 3645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // @ is not a legal token unless objc is enabled, no need to check. 3652bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff return ParseObjCAtDirectives(); 3665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::minus: 3675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::plus: 36860fbca0b027ff5a6579f16cb6e3abab826e0d967Fariborz Jahanian if (getLang().ObjC1) 36971c0a951d08dc7a2a057df8c15f22b36f6aa47c7Steve Naroff return ParseObjCMethodDefinition(); 37060fbca0b027ff5a6579f16cb6e3abab826e0d967Fariborz Jahanian else { 3715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_external_declaration); 3725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 375f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor case tok::kw_using: 3768f08cb7d0b97786b17ef05e05caa55aad4d6bd39Chris Lattner case tok::kw_namespace: 3775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::kw_typedef: 378adcac8824a9cff13f1ef61a69e38c1041cba12eeDouglas Gregor case tok::kw_template: 379adcac8824a9cff13f1ef61a69e38c1041cba12eeDouglas Gregor case tok::kw_export: // As in 'export template' 380bae35118fc5cea2da08567dbb9763af7f906dae2Chris Lattner // A function definition cannot start with a these keywords. 3815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclaration(Declarator::FileContext); 38290b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner 3835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 3845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We can't tell whether this is a function-definition or declaration yet. 3855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclarationOrFunctionDefinition(); 3865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or 3905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a declaration. We can't tell which we have until we read up to the 391c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor/// compound-statement in function-definition. TemplateParams, if 392c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor/// non-NULL, provides the template parameters when we're parsing a 393c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor/// C++ template-declaration. 3945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// function-definition: [C99 6.9.1] 396a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 397a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 398a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 399a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// 4005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// declaration: [C99 6.7] 401697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// declaration-specifiers init-declarator-list[opt] ';' 402697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// [!C99] init-declarator-list ';' [TODO: warn in c99 mode] 4035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OMP] threadprivate-directive [TODO] 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 405c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas GregorParser::DeclTy * 406c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas GregorParser::ParseDeclarationOrFunctionDefinition( 407c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor TemplateParameterLists *TemplateParams) { 4085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 4095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 410c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor ParseDeclarationSpecifiers(DS, TemplateParams); 411a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 4125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 4135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // declaration-specifiers init-declarator-list[opt] ';' 414000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 4165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 4175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 418a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 419246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // ObjC2 allows prefix attributes on class interfaces and protocols. 420246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // FIXME: This still needs better diagnostics. We should only accept 421246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // attributes here, no types, etc. 422000732226610650837478cba97843d19b75f648eChris Lattner if (getLang().ObjC2 && Tok.is(tok::at)) { 423dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff SourceLocation AtLoc = ConsumeToken(); // the "@" 424246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (!Tok.isObjCAtKeyword(tok::objc_interface) && 425246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar !Tok.isObjCAtKeyword(tok::objc_protocol)) { 426246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar Diag(Tok, diag::err_objc_unexpected_attr); 427cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner SkipUntil(tok::semi); // FIXME: better skip? 428cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner return 0; 429cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner } 4300de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian const char *PrevSpec = 0; 4310de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec)) 4321ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(AtLoc, diag::err_invalid_decl_spec_combination) << PrevSpec; 433246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (Tok.isObjCAtKeyword(tok::objc_protocol)) 434246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes()); 435a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump return ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()); 436dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff } 437a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 438c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // If the declspec consisted only of 'extern' and we have a string 439c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // literal following it, this must be a C++ linkage specifier like 440c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // 'extern "C"'. 4413c6f6a7a1bb9969112617a26d2333bab2f6efd65Chris Lattner if (Tok.is(tok::string_literal) && getLang().CPlusPlus && 442c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getStorageClassSpec() == DeclSpec::SCS_extern && 443c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) 444c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner return ParseLinkage(Declarator::FileContext); 445c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 4465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator. 4475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator DeclaratorInfo(DS, Declarator::FileContext); 4485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(DeclaratorInfo); 4495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Error parsing the declarator? 45010bd36882406cdf4805e35add1ce2f11ab9ae152Douglas Gregor if (!DeclaratorInfo.hasName()) { 4515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If so, skip until the semi-colon or a }. 452cb43d999520f547d682a1ca280ecfedb115ee1fdDouglas Gregor SkipUntil(tok::r_brace, true, true); 453000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 4545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 4555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the declarator is the start of a function definition, handle it. 459000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::equal) || // int X()= -> not a function def 460000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::comma) || // int X(), -> not a function def 461000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::semi) || // int X(); -> not a function def 462000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def 46373a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def 46473a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis (getLang().CPlusPlus && 46573a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis Tok.is(tok::l_paren)) ) { // int X(0) -> not a function def [C++] 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 4675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (DeclaratorInfo.isFunctionDeclarator() && 468cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis (Tok.is(tok::l_brace) || // int X() {} 469cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis ( !getLang().CPlusPlus && 470cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis isDeclarationSpecifier() ))) { // int X(f) int f; {} 471e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 472e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff Diag(Tok, diag::err_function_declared_typedef); 473a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 474e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (Tok.is(tok::l_brace)) { 475e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // This recovery skips the entire function body. It would be nice 47672c3f314d92d65c050ee1c07b7753623c044d6c7Douglas Gregor // to simply call ParseFunctionDefinition() below, however Sema 477e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // assumes the declarator represents a function, not a typedef. 478e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff ConsumeBrace(); 479e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::r_brace, true); 480e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } else { 481e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::semi); 482e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 483e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff return 0; 484e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 4855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseFunctionDefinition(DeclaratorInfo); 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 4875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DeclaratorInfo.isFunctionDeclarator()) 4885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 4895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 4905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_after_declarator); 4915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi); 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the init-declarator-list for a normal declaration. 4965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo); 4975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseFunctionDefinition - We parsed and verified that the specified 5005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Declarator is well formed. If this is a K&R-style function, read the 5015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// parameters declaration-list, then start the compound-statement. 5025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 503a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// function-definition: [C99 6.9.1] 504a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 505a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 506a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 5077ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 5087ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// decl-specifier-seq[opt] declarator ctor-initializer[opt] function-body 5097ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 5107ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// decl-specifier-seq[opt] declarator function-try-block [TODO] 5115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 5125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseFunctionDefinition(Declarator &D) { 5135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0); 5145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(FnTypeInfo.Kind == DeclaratorChunk::Function && 5155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "This isn't a function declarator!"); 5165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun; 517a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 518a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // If this is C90 and the declspecs were completely missing, fudge in an 519a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // implicit int. We do this here because this is the only place where 520a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // declaration-specifiers are completely optional in the grammar. 521d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner if (getLang().ImplicitInt && D.getDeclSpec().getParsedSpecifiers() == 0) { 522a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner const char *PrevSpec; 52331c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int, 52431c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getIdentifierLoc(), 52531c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner PrevSpec); 526a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner } 527a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this declaration was formed with a K&R-style identifier list for the 5295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // arguments, parse declarations for all of the args next. 5305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // int foo(a,b) int a; float b; {} 5315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!FTI.hasPrototype && FTI.NumArgs != 0) 5325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseKNRParamDeclarations(D); 5335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5347ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // We should have either an opening brace or, in a C++ constructor, 5357ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // we may have a colon. 536618e5c04702b156d75aa2636232ef8430912abdcSebastian Redl // FIXME: In C++, we might also find the 'try' keyword. 5377ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (Tok.isNot(tok::l_brace) && Tok.isNot(tok::colon)) { 5385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 5395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over garbage, until we get to '{'. Don't eat the '{'. 5415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::l_brace, true, true); 542a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we didn't find the '{', bail out. 544000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_brace)) 5455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 5465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 547a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 548b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Enter a scope for the function body. 5498935b8b49053122ddd3ab4cd59af0fe5eb9c23cfDouglas Gregor ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope); 550a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 551b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Tell the actions module that we have entered a function definition with the 552b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // specified Declarator for the function. 553b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner DeclTy *Res = Actions.ActOnStartOfFunctionDef(CurScope, D); 554a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5557ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // If we have a colon, then we're probably parsing a C++ 5567ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // ctor-initializer. 5577ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (Tok.is(tok::colon)) 5587ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor ParseConstructorInitializer(Res); 5597ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor 5607ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor SourceLocation BraceLoc = Tok.getLocation(); 561a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump return ParseFunctionStatementBody(Res, BraceLoc, BraceLoc); 5625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides 5655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// types for a function with a K&R-style identifier list for arguments. 5665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseKNRParamDeclarations(Declarator &D) { 5675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that the top-level of this declarator is a function. 5685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; 5695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 57004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Enter function-declaration scope, limiting any declarators to the 57104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // function prototype scope, including parameter declarators. 5723218c4bb3b5d7250f12420de6db7ef3e3f805a75Douglas Gregor ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope|Scope::DeclScope); 57304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read all the argument declarations. 5755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (isDeclarationSpecifier()) { 5765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation DSStart = Tok.getLocation(); 577a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 5795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 5805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 581a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: 'each declaration in the declaration list shall have at 5835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // least one declarator'. 5845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // NOTE: GCC just makes this an ext-warn. It's not clear what it does with 5855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the declarations though. It's trivial to ignore them, really hard to do 5865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // anything else with them. 587000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 5885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DSStart, diag::err_declaration_does_not_declare_param); 5895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 5905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 592a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // than register. 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getStorageClassSpec() != DeclSpec::SCS_register) { 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getStorageClassSpecLoc(), 5985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 5995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 6005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.isThreadSpecified()) { 6025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getThreadSpecLoc(), 6035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 6045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 6055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 606a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator attached to this declspec. 6085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext); 6095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 6105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Handle the full declarator list. 6125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 6135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclTy *AttrList; 6145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If attributes are present, parse them. 615000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::kw___attribute)) 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: attach attributes too. 6175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AttrList = ParseAttributes(); 618a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ask the actions module to compute the type for this declarator. 620a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump Action::DeclTy *Param = 62104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Actions.ActOnParamDeclarator(CurScope, ParmDeclarator); 6222bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff 623a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump if (Param && 6245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // A missing identifier has already been diagnosed. 6255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()) { 6265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan the argument list looking for the correct param to apply this 6285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // type. 6295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; ; ++i) { 6305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: those declarators shall declare only identifiers from 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the identifier list. 6325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (i == FTI.NumArgs) { 6331ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param) 6346898e33d0b28346a4dbe9a666e0e4188fea80460Chris Lattner << ParmDeclarator.getIdentifier(); 6355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 637a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) { 6395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reject redefinitions of parameters. 64004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner if (FTI.ArgInfo[i].Param) { 6415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ParmDeclarator.getIdentifierLoc(), 6421ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner diag::err_param_redefinition) 6436898e33d0b28346a4dbe9a666e0e4188fea80460Chris Lattner << ParmDeclarator.getIdentifier(); 6445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 64504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner FTI.ArgInfo[i].Param = Param; 6465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we don't have a comma, it is either the end of the list (a ';') or 6535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // an error, bail out. 654000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::comma)) 6555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 656a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Consume the comma. 6585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 659a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the next declarator. 6615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.clear(); 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 6635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 664a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 665000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 6665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_parse_error); 6695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip to end of block or statement 6705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi, true); 671000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 6725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 675a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The actions module must verify that all arguments were declared. 677be109b3e768b70f9efb106d25d6b5a2c72c5a9b8Douglas Gregor Actions.ActOnFinishKNRParamDeclarations(CurScope, D); 6785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseAsmStringLiteral - This is just a normal string-literal, but is not 6825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// allowed to be a wide string, and is not subject to character translation. 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-string-literal: 6855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 687effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian RedlParser::OwningExprResult Parser::ParseAsmStringLiteral() { 6885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isTokenStringLiteral()) { 6895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_string_literal); 69061364dddc33383e62cfe3b841dbc0f471280d95bSebastian Redl return ExprError(); 6915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 692a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 69320df9b7ab9388b2a488c5b1293cd196b1e073b4eSebastian Redl OwningExprResult Res(ParseStringLiteralExpression()); 694effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl if (Res.isInvalid()) return move(Res); 695a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Diagnose: wide string literal in 'asm' 697a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 698effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return move(Res); 6995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseSimpleAsm 7025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 7035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] simple-asm-expr: 7045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 'asm' '(' asm-string-literal ')' 7055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 706effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian RedlParser::OwningExprResult Parser::ParseSimpleAsm() { 707000732226610650837478cba97843d19b75f648eChris Lattner assert(Tok.is(tok::kw_asm) && "Not an asm!"); 708dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson SourceLocation Loc = ConsumeToken(); 709a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 710000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_paren)) { 7111ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(Tok, diag::err_expected_lparen_after) << "asm"; 71261364dddc33383e62cfe3b841dbc0f471280d95bSebastian Redl return ExprError(); 7135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 714a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 715dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson ConsumeParen(); 716a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 717effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl OwningExprResult Result(ParseAsmStringLiteral()); 718a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7190e9eabca263e8922bec0e2b38c8670eba9a39a1fSebastian Redl if (Result.isInvalid()) 720a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar SkipUntil(tok::r_paren); 7218f5421a2cfaff0b5ef93a4116f697ed98ce08828Chris Lattner else 722a80f8749f2968d19595ca2544114932bf0ca2c11Daniel Dunbar MatchRHSPunctuation(tok::r_paren, Loc); 723a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 724effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return move(Result); 7255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 727eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateTypeOrScopeToken - If the current token position is on a 728eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typename (possibly qualified in C++) or a C++ scope specifier not followed 729eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens 730eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// with a single annotation token representing the typename or C++ scope 731eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// respectively. 732eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// This simplifies handling of C++ scope specifiers and allows efficient 733eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// backtracking without the need to re-parse and resolve nested-names and 734eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typenames. 73544802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// It will mainly be called when we expect to treat identifiers as typenames 73644802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// (if they are typenames). For example, in C we do not expect identifiers 73744802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// inside expressions to be treated as typenames so it will not be called 73844802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// for expressions in C. 73944802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// The benefit for C/ObjC is that a typename will be annotated and 74044802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// Actions.isTypeName will not be needed to be called again (e.g. isTypeName 74144802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// will not be called twice, once to check whether we have a declaration 74244802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// specifier, and another one to get the actual type inside 74344802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// ParseDeclarationSpecifiers). 744a7bc7c880f86bc180684ef032d06df51bcae7a23Chris Lattner/// 745a7bc7c880f86bc180684ef032d06df51bcae7a23Chris Lattner/// This returns true if the token was annotated. 74655a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// 74755a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// Note that this routine emits an error if you call it with ::new or ::delete 74855a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// as the current tokens, so only call it in contexts where these are invalid. 7495b4547318bb179fc76f984f0eeaaf615927e795cChris Lattnerbool Parser::TryAnnotateTypeOrScopeToken() { 7507452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && 7517452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner "Cannot be a type or scope token!"); 7527452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner 7537452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner // FIXME: Implement template-ids 754eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis CXXScopeSpec SS; 7554bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis if (getLang().CPlusPlus) 7567a0ab5f387722c83e19c7133b46b16988eb19e45Chris Lattner ParseOptionalCXXScopeSpecifier(SS); 757eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 758eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::identifier)) { 759608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // Determine whether the identifier is a type name. 760608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner if (TypeTy *Ty = Actions.isTypeName(*Tok.getIdentifierInfo(), 761608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner CurScope, &SS)) { 762608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // This is a typename. Replace the current token in-place with an 763608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // annotation type token. 764b31757b68afe06ba442a05775d08fe7aa0f6f889Chris Lattner Tok.setKind(tok::annot_typename); 765608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Tok.setAnnotationValue(Ty); 766608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Tok.setAnnotationEndLoc(Tok.getLocation()); 767608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner if (SS.isNotEmpty()) // it was a C++ qualified type name. 768608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Tok.setLocation(SS.getBeginLoc()); 769608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner 770608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // In case the tokens were cached, have Preprocessor replace 771608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // them with the annotation token. 772608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner PP.AnnotateCachedTokens(Tok); 773608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner return true; 774608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner } else if (!getLang().CPlusPlus) { 775608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // If we're in C, we can't have :: tokens at all (the lexer won't return 776608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // them). If the identifier is not a type, then it can't be scope either, 777608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // just early exit. 778608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner return false; 779eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 780608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner 781608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // If this is a template-id, annotate the template-id token. 782608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner if (NextToken().is(tok::less)) 783608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner if (DeclTy *Template = 784608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Actions.isTemplateName(*Tok.getIdentifierInfo(), CurScope, &SS)) 785608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner AnnotateTemplateIdToken(Template, &SS); 786d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor 787d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor // We either have an identifier that is not a type name or we have 788d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor // just created a template-id that might be a type name. Both 789d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor // cases will be handled below. 790eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 791eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 792d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor // FIXME: check for a template-id token here, and look it up if it 793d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor // names a type. 794d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor 7956ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner if (SS.isEmpty()) 796a7bc7c880f86bc180684ef032d06df51bcae7a23Chris Lattner return false; 7976ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner 7986ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // A C++ scope specifier that isn't followed by a typename. 7996ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // Push the current token back into the token stream (or revert it if it is 8006ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // cached) and use an annotation scope token for current token. 8016ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner if (PP.isBacktrackEnabled()) 8026ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.RevertCachedTokens(1); 8036ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner else 8046ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.EnterToken(Tok); 8056ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setKind(tok::annot_cxxscope); 8066ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setAnnotationValue(SS.getScopeRep()); 8076ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setAnnotationRange(SS.getRange()); 8086ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner 8096ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // In case the tokens were cached, have Preprocessor replace them with the 8106ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // annotation token. 8116ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.AnnotateCachedTokens(Tok); 812a7bc7c880f86bc180684ef032d06df51bcae7a23Chris Lattner return true; 813eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 814eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 815eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only 8165e02c47a7085831586344a9728763cb50540c7f7Chris Lattner/// annotates C++ scope specifiers. This returns true if the token was 8175e02c47a7085831586344a9728763cb50540c7f7Chris Lattner/// annotated. 81855a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// 81955a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// Note that this routine emits an error if you call it with ::new or ::delete 82055a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// as the current tokens, so only call it in contexts where these are invalid. 8215e02c47a7085831586344a9728763cb50540c7f7Chris Lattnerbool Parser::TryAnnotateCXXScopeToken() { 8224bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis assert(getLang().CPlusPlus && 8236ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner "Call sites of this function should be guarded by checking for C++"); 8247452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && 8257452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner "Cannot be a type or scope token!"); 826eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 8274bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis CXXScopeSpec SS; 8287a0ab5f387722c83e19c7133b46b16988eb19e45Chris Lattner if (!ParseOptionalCXXScopeSpecifier(SS)) 8295e02c47a7085831586344a9728763cb50540c7f7Chris Lattner return false; 830eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 8316ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // Push the current token back into the token stream (or revert it if it is 8326ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // cached) and use an annotation scope token for current token. 8336ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner if (PP.isBacktrackEnabled()) 8346ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.RevertCachedTokens(1); 8356ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner else 8366ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.EnterToken(Tok); 8376ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setKind(tok::annot_cxxscope); 8386ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setAnnotationValue(SS.getScopeRep()); 8396ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setAnnotationRange(SS.getRange()); 8406ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner 8416ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // In case the tokens were cached, have Preprocessor replace them with the 8426ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // annotation token. 8436ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.AnnotateCachedTokens(Tok); 8445e02c47a7085831586344a9728763cb50540c7f7Chris Lattner return true; 845eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 846