Parser.cpp revision b2fb6de9070fea9abc56c8e8d5469066e964cefe
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" 15500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/Parse/ParseDiagnostic.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) 2355f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor : PP(pp), Actions(actions), Diags(PP.getDiagnostics()), 2455f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor GreaterThanIsOperator(true) { 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Tok.setKind(tok::eof); 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = 0; 279e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner NumCachedScopes = 0; 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParenCount = BracketCount = BraceCount = 0; 29a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCImpDecl = 0; 30fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 31fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // Add #pragma handlers. These are removed and destroyed in the 32fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // destructor. 33fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar PackHandler = 34fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar new PragmaPackHandler(&PP.getIdentifierTable().get("pack"), actions); 35fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar PP.AddPragmaHandler(0, PackHandler); 36fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 374cc18a4d5222e04bd568b1e3e4d86127dbbcdf3fArgyrios Kyrtzidis // Instantiate a LexedMethodsForTopClass for all the non-nested classes. 384cc18a4d5222e04bd568b1e3e4d86127dbbcdf3fArgyrios Kyrtzidis PushTopClassStack(); 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Out-of-line virtual destructor to provide home for Action class. 427f792faf0cee47fa1ea304bd7a7f502c0e5bbc9aSebastian RedlActionBase::~ActionBase() {} 437f792faf0cee47fa1ea304bd7a7f502c0e5bbc9aSebastian Redl 447f792faf0cee47fa1ea304bd7a7f502c0e5bbc9aSebastian Redl/// Out-of-line virtual destructor to provide home for Action class. 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerAction::~Action() {} 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 47f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor// Defined out-of-line here because of dependecy on AttributeList 48f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas GregorAction::DeclTy *Action::ActOnUsingDirective(Scope *CurScope, 49f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor SourceLocation UsingLoc, 50f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor SourceLocation NamespcLoc, 51f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor const CXXScopeSpec &SS, 52f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor SourceLocation IdentLoc, 53f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor IdentifierInfo *NamespcName, 54f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor AttributeList *AttrList) { 55f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor 56f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor // FIXME: Parser seems to assume that Action::ActOn* takes ownership over 57f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor // passed AttributeList, however other actions don't free it, is it 58f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor // temporary state or bug? 59f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor delete AttrList; 60f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor return 0; 61f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor} 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 633cbfe2c4159e0a219ae660d50625c013aa4afbd0Chris LattnerDiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) { 641ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner return Diags.Report(FullSourceLoc(Loc,PP.getSourceManager()), DiagID); 651ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner} 661ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner 673cbfe2c4159e0a219ae660d50625c013aa4afbd0Chris LattnerDiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) { 681ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner return Diag(Tok.getLocation(), DiagID); 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 714b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// \brief Emits a diagnostic suggesting parentheses surrounding a 724b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// given range. 734b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// 744b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// \param Loc The location where we'll emit the diagnostic. 754b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// \param Loc The kind of diagnostic to emit. 764b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// \param ParenRange Source range enclosing code that should be parenthesized. 774b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregorvoid Parser::SuggestParentheses(SourceLocation Loc, unsigned DK, 784b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor SourceRange ParenRange) { 79b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor SourceLocation EndLoc = PP.getLocForEndOfToken(ParenRange.getEnd()); 80b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor if (!ParenRange.getEnd().isFileID() || EndLoc.isInvalid()) { 814b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor // We can't display the parentheses, so just dig the 824b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor // warning/error and return. 834b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor Diag(Loc, DK); 844b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor return; 854b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor } 864b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor 874b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor Diag(Loc, DK) 88b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor << CodeModificationHint::CreateInsertion(ParenRange.getBegin(), "(") 89b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor << CodeModificationHint::CreateInsertion(EndLoc, ")"); 904b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor} 914b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// MatchRHSPunctuation - For punctuation with a LHS and RHS (e.g. '['/']'), 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// this helper function matches and consumes the specified RHS token if 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// present. If not present, it emits the specified diagnostic indicating 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the parser failed to match the RHS of the token at LHSLoc. LHSName 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// should be the name of the unmatched LHS token. 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerSourceLocation Parser::MatchRHSPunctuation(tok::TokenKind RHSTok, 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation LHSLoc) { 99a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 100000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(RHSTok)) 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ConsumeAnyToken(); 102a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation R = Tok.getLocation(); 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *LHSName = "unknown"; 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::kind DID = diag::err_parse_error; 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (RHSTok) { 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: break; 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break; 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break; 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break; 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greater: LHSName = "<"; DID = diag::err_expected_greater; break; 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, DID); 11428eb7e992b9a266abb300da25b6d3c1557cec361Chris Lattner Diag(LHSLoc, diag::note_matching) << LHSName; 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(RHSTok); 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return R; 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// input. If so, it is consumed and false is returned. 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If the input is malformed, this emits the specified diagnostic. Next, if 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// returned. 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID, 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *Msg, tok::TokenKind SkipToTok) { 127000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(ExpectedTok)) { 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 131a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1324b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor const char *Spelling = 0; 133b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation); 134b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor if (EndLoc.isValid() && 135b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor (Spelling = tok::getTokenSimpleSpelling(ExpectedTok))) { 1364b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor // Show what code to insert to fix this problem. 137b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor Diag(EndLoc, DiagID) 1384b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor << Msg 139b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor << CodeModificationHint::CreateInsertion(EndLoc, Spelling); 1404b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor } else 1414b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor Diag(Tok, DiagID) << Msg; 1424b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (SkipToTok != tok::unknown) 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(SkipToTok); 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Error recovery. 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipUntil - Read tokens until we get to the specified token, then consume 153012cf464254804279efa84e21b4b493dde76c5f1Chris Lattner/// it (unless DontConsume is true). Because we cannot guarantee that the 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// token will ever occur, this skips to the next token, or to some likely 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// good stopping point. If StopAtSemi is true, skipping will stop at a ';' 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character. 157a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If SkipUntil finds the specified token, it returns true, otherwise it 159a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// returns false. 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::SkipUntil(const tok::TokenKind *Toks, unsigned NumToks, 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool StopAtSemi, bool DontConsume) { 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We always want this function to skip at least one token if the first token 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // isn't T and if not at EOF. 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isFirstTokenSkipped = true; 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we found one of the tokens, stop and return true. 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; i != NumToks; ++i) { 168000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(Toks[i])) { 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DontConsume) { 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Noop, don't consume the token. 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 177a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::eof: 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ran out of tokens. 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 182a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_paren: 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested parens. 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_paren, false); 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_square: 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested square brackets. 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_square, false); 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_brace: 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested braces. 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_brace, false); 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 198a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Okay, we found a ']' or '}' or ')', which we think should be balanced. 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Since the user wasn't looking for this token (if they were, it would 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // already be handled), this isn't balanced. If there is a LHS token at a 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // higher level, we will assume that this matches the unbalanced token 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and return it. Otherwise, this is a spurious RHS token, which we skip. 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren: 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ParenCount && !isFirstTokenSkipped) 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BracketCount && !isFirstTokenSkipped) 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace: 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BraceCount && !isFirstTokenSkipped) 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 2175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 219a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::string_literal: 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::wide_string_literal: 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeStringToken(); 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StopAtSemi) 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 2285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip this token. 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isFirstTokenSkipped = false; 234a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump } 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Scope manipulation 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// EnterScope - Start a new scope. 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::EnterScope(unsigned ScopeFlags) { 2439e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes) { 2449e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *N = ScopeCache[--NumCachedScopes]; 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer N->Init(CurScope, ScopeFlags); 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = N; 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 2485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = new Scope(CurScope, ScopeFlags); 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExitScope - Pop a scope off the scope stack. 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ExitScope() { 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope && "Scope imbalance!"); 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 25690ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // Inform the actions module that this scope is going away if there are any 25790ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // decls in it. 25890ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner if (!CurScope->decl_empty()) 259b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnPopScope(Tok.getLocation(), CurScope); 260a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2619e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *OldScope = CurScope; 2629e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner CurScope = OldScope->getParent(); 263a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2649e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes == ScopeCacheSize) 2659e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete OldScope; 2665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 2679e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner ScopeCache[NumCachedScopes++] = OldScope; 2685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// C99 6.9: External Definitions. 2755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::~Parser() { 2785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we still have scopes active, delete the scope tree. 2795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete CurScope; 280a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Free the scope cache. 2829e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner for (unsigned i = 0, e = NumCachedScopes; i != e; ++i) 2839e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete ScopeCache[i]; 284fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 285fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // Remove the pragma handlers we installed. 286fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar PP.RemovePragmaHandler(0, PackHandler); 287fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar delete PackHandler; 2885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Initialize - Warm up the parser. 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 2925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::Initialize() { 2935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Prime the lexer look-ahead. 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 295a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 29631e057270232c1c37602579cb6461c2704175672Chris Lattner // Create the translation unit scope. Install it as the current scope. 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope == 0 && "A scope is already active?"); 29831e057270232c1c37602579cb6461c2704175672Chris Lattner EnterScope(Scope::DeclScope); 299b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnTranslationUnitScope(Tok.getLocation(), CurScope); 300a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 301000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::eof) && 302f72617544287acf0281c3b1a733bcb22a02e6ca4Chris Lattner !getLang().CPlusPlus) // Empty source file is an extension in C 3035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_empty_source_file); 304a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 30534870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner // Initialization for Objective-C context sensitive keywords recognition. 306a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek // Referenced in Parser::ParseObjCTypeQualifierList. 30734870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner if (getLang().ObjC1) { 308a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in"); 309a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out"); 310a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout"); 311a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway"); 312a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy"); 313a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref"); 31434870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner } 315662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar 316662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar Ident_super = &PP.getIdentifierTable().get("super"); 3175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTopLevelDecl - Parse one top-level declaration, return whatever the 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// action tells us to. This returns true if the EOF was encountered. 32189307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroffbool Parser::ParseTopLevelDecl(DeclTy*& Result) { 32289307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = 0; 3239299f3fa85796613cc787a2062c9562d07c8613eChris Lattner if (Tok.is(tok::eof)) { 3249299f3fa85796613cc787a2062c9562d07c8613eChris Lattner Actions.ActOnEndOfTranslationUnit(); 3259299f3fa85796613cc787a2062c9562d07c8613eChris Lattner return true; 3269299f3fa85796613cc787a2062c9562d07c8613eChris Lattner } 327a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 32889307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = ParseExternalDeclaration(); 3295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 3305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTranslationUnit: 3335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// translation-unit: [C99 6.9] 334a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// external-declaration 335a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// translation-unit external-declaration 3365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseTranslationUnit() { 3378935b8b49053122ddd3ab4cd59af0fe5eb9c23cfDouglas Gregor Initialize(); 338a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 33989307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff DeclTy *Res; 34089307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff while (!ParseTopLevelDecl(Res)) 3415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /*parse them all*/; 34206f548596beef4c0a227a45cba996497f99566c0Chris Lattner 34306f548596beef4c0a227a45cba996497f99566c0Chris Lattner ExitScope(); 34406f548596beef4c0a227a45cba996497f99566c0Chris Lattner assert(CurScope == 0 && "Scope imbalance!"); 3455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseExternalDeclaration: 34890b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner/// 349c19923dda3d28f67aab4726cd40bb07032758383Douglas Gregor/// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl] 350c3018153a11afe91849748a93d920040a571b76cChris Lattner/// function-definition 351c3018153a11afe91849748a93d920040a571b76cChris Lattner/// declaration 3525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [EXT] ';' 3535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition 354c3018153a11afe91849748a93d920040a571b76cChris Lattner/// [GNU] __extension__ external-declaration 3555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-definition 3565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-declaration 3575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-alias-declaration 3585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-protocol-definition 3595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-method-definition 3605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] @end 361c19923dda3d28f67aab4726cd40bb07032758383Douglas Gregor/// [C++] linkage-specification 3625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition: 3635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// simple-asm-expr ';' 3645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseExternalDeclaration() { 3665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 3675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 3685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_top_level_semi); 3695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 3705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Invoke action for top-level semicolon. 3715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 37290b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner case tok::r_brace: 37390b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner Diag(Tok, diag::err_expected_external_declaration); 37490b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner ConsumeBrace(); 37590b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner return 0; 37690b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner case tok::eof: 37790b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner Diag(Tok, diag::err_expected_external_declaration); 37890b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner return 0; 379c3018153a11afe91849748a93d920040a571b76cChris Lattner case tok::kw___extension__: { 380c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner // __extension__ silences extension warnings in the subexpression. 381c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner ExtensionRAIIObject O(Diags); // Use RAII to do this. 38239146d6497ad5e7ca8ef639221e7b3e15d07c888Chris Lattner ConsumeToken(); 383c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner return ParseExternalDeclaration(); 384c3018153a11afe91849748a93d920040a571b76cChris Lattner } 385dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson case tok::kw_asm: { 386effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl OwningExprResult Result(ParseSimpleAsm()); 387a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 3883f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 3893f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson "top-level asm block"); 390dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson 3910e9eabca263e8922bec0e2b38c8670eba9a39a1fSebastian Redl if (!Result.isInvalid()) 39276ad2e85575722e8a38a2bd4648ab4304d9fcd24Sebastian Redl return Actions.ActOnFileScopeAsmDecl(Tok.getLocation(), move(Result)); 393aec3a1eb215445e63ba5702f8d6b1e0f2e8c27b9Chris Lattner return 0; 394dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson } 3955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::at: 3965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // @ is not a legal token unless objc is enabled, no need to check. 3972bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff return ParseObjCAtDirectives(); 3985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::minus: 3995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::plus: 40060fbca0b027ff5a6579f16cb6e3abab826e0d967Fariborz Jahanian if (getLang().ObjC1) 40171c0a951d08dc7a2a057df8c15f22b36f6aa47c7Steve Naroff return ParseObjCMethodDefinition(); 40260fbca0b027ff5a6579f16cb6e3abab826e0d967Fariborz Jahanian else { 4035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_external_declaration); 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 4055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 407f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor case tok::kw_using: 4088f08cb7d0b97786b17ef05e05caa55aad4d6bd39Chris Lattner case tok::kw_namespace: 4095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::kw_typedef: 410adcac8824a9cff13f1ef61a69e38c1041cba12eeDouglas Gregor case tok::kw_template: 411adcac8824a9cff13f1ef61a69e38c1041cba12eeDouglas Gregor case tok::kw_export: // As in 'export template' 412bae35118fc5cea2da08567dbb9763af7f906dae2Chris Lattner // A function definition cannot start with a these keywords. 4135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclaration(Declarator::FileContext); 4145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We can't tell whether this is a function-definition or declaration yet. 4165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclarationOrFunctionDefinition(); 4175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or 4215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a declaration. We can't tell which we have until we read up to the 422c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor/// compound-statement in function-definition. TemplateParams, if 423c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor/// non-NULL, provides the template parameters when we're parsing a 424c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor/// C++ template-declaration. 4255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 4265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// function-definition: [C99 6.9.1] 427a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 428a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 429a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 430a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// 4315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// declaration: [C99 6.7] 432697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// declaration-specifiers init-declarator-list[opt] ';' 433697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// [!C99] init-declarator-list ';' [TODO: warn in c99 mode] 4345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OMP] threadprivate-directive [TODO] 4355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 436c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas GregorParser::DeclTy * 437c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas GregorParser::ParseDeclarationOrFunctionDefinition( 438c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor TemplateParameterLists *TemplateParams) { 4395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 4405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 441c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor ParseDeclarationSpecifiers(DS, TemplateParams); 442a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 4435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 4445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // declaration-specifiers init-declarator-list[opt] ';' 445000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 4465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 4475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 4485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 449a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 450246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // ObjC2 allows prefix attributes on class interfaces and protocols. 451246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // FIXME: This still needs better diagnostics. We should only accept 452246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // attributes here, no types, etc. 453000732226610650837478cba97843d19b75f648eChris Lattner if (getLang().ObjC2 && Tok.is(tok::at)) { 454dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff SourceLocation AtLoc = ConsumeToken(); // the "@" 455246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (!Tok.isObjCAtKeyword(tok::objc_interface) && 456246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar !Tok.isObjCAtKeyword(tok::objc_protocol)) { 457246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar Diag(Tok, diag::err_objc_unexpected_attr); 458cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner SkipUntil(tok::semi); // FIXME: better skip? 459cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner return 0; 460cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner } 4610de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian const char *PrevSpec = 0; 4620de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec)) 4631ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(AtLoc, diag::err_invalid_decl_spec_combination) << PrevSpec; 464246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (Tok.isObjCAtKeyword(tok::objc_protocol)) 465246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes()); 466a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump return ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()); 467dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff } 468a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 469c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // If the declspec consisted only of 'extern' and we have a string 470c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // literal following it, this must be a C++ linkage specifier like 471c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // 'extern "C"'. 4723c6f6a7a1bb9969112617a26d2333bab2f6efd65Chris Lattner if (Tok.is(tok::string_literal) && getLang().CPlusPlus && 473c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getStorageClassSpec() == DeclSpec::SCS_extern && 474c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) 475c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner return ParseLinkage(Declarator::FileContext); 476c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 4775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator. 4785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator DeclaratorInfo(DS, Declarator::FileContext); 4795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(DeclaratorInfo); 4805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Error parsing the declarator? 48110bd36882406cdf4805e35add1ce2f11ab9ae152Douglas Gregor if (!DeclaratorInfo.hasName()) { 4825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If so, skip until the semi-colon or a }. 483cb43d999520f547d682a1ca280ecfedb115ee1fdDouglas Gregor SkipUntil(tok::r_brace, true, true); 484000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 4855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 4875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the declarator is the start of a function definition, handle it. 490000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::equal) || // int X()= -> not a function def 491000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::comma) || // int X(), -> not a function def 492000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::semi) || // int X(); -> not a function def 493000732226610650837478cba97843d19b75f648eChris Lattner Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def 49473a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def 49573a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis (getLang().CPlusPlus && 49673a0d889eda0f000a441319e39540509175b8e81Argyrios Kyrtzidis Tok.is(tok::l_paren)) ) { // int X(0) -> not a function def [C++] 4975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 4985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (DeclaratorInfo.isFunctionDeclarator() && 499cf28c72980746707e25a833426315187534d41fcArgyrios Kyrtzidis (Tok.is(tok::l_brace) || // int X() {} 50051a75d0cc7651753399efdc3176feaee6214c3caChris Lattner (!getLang().CPlusPlus && 50151a75d0cc7651753399efdc3176feaee6214c3caChris Lattner isDeclarationSpecifier()))) { // int X(f) int f; {} 502e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 503e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff Diag(Tok, diag::err_function_declared_typedef); 504a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 505e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (Tok.is(tok::l_brace)) { 506e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // This recovery skips the entire function body. It would be nice 50772c3f314d92d65c050ee1c07b7753623c044d6c7Douglas Gregor // to simply call ParseFunctionDefinition() below, however Sema 508e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // assumes the declarator represents a function, not a typedef. 509e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff ConsumeBrace(); 510e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::r_brace, true); 511e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } else { 512e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::semi); 513e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 514e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff return 0; 515e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 5165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseFunctionDefinition(DeclaratorInfo); 5175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DeclaratorInfo.isFunctionDeclarator()) 5195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 5205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 52151a75d0cc7651753399efdc3176feaee6214c3caChris Lattner Diag(Tok, diag::err_invalid_token_after_toplevel_declarator); 5225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi); 5235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 5245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the init-declarator-list for a normal declaration. 5275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo); 5285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseFunctionDefinition - We parsed and verified that the specified 5315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Declarator is well formed. If this is a K&R-style function, read the 5325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// parameters declaration-list, then start the compound-statement. 5335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 534a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// function-definition: [C99 6.9.1] 535a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 536a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 537a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 5387ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 5397ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// decl-specifier-seq[opt] declarator ctor-initializer[opt] function-body 5407ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 5417ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// decl-specifier-seq[opt] declarator function-try-block [TODO] 5425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::DeclTy *Parser::ParseFunctionDefinition(Declarator &D) { 5445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0); 5455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(FnTypeInfo.Kind == DeclaratorChunk::Function && 5465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "This isn't a function declarator!"); 5475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun; 548a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 549a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // If this is C90 and the declspecs were completely missing, fudge in an 550a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // implicit int. We do this here because this is the only place where 551a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // declaration-specifiers are completely optional in the grammar. 552d658b562e80d6ef7a1118e34ff12802c6e2fccedChris Lattner if (getLang().ImplicitInt && D.getDeclSpec().getParsedSpecifiers() == 0) { 553a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner const char *PrevSpec; 55431c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int, 55531c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getIdentifierLoc(), 55631c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner PrevSpec); 557ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl D.SetRangeBegin(D.getDeclSpec().getSourceRange().getBegin()); 558a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner } 559a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this declaration was formed with a K&R-style identifier list for the 5615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // arguments, parse declarations for all of the args next. 5625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // int foo(a,b) int a; float b; {} 5635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!FTI.hasPrototype && FTI.NumArgs != 0) 5645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseKNRParamDeclarations(D); 5655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5667ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // We should have either an opening brace or, in a C++ constructor, 5677ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // we may have a colon. 568618e5c04702b156d75aa2636232ef8430912abdcSebastian Redl // FIXME: In C++, we might also find the 'try' keyword. 5697ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (Tok.isNot(tok::l_brace) && Tok.isNot(tok::colon)) { 5705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 5715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over garbage, until we get to '{'. Don't eat the '{'. 5735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::l_brace, true, true); 574a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we didn't find the '{', bail out. 576000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_brace)) 5775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return 0; 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 579a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 580b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Enter a scope for the function body. 5818935b8b49053122ddd3ab4cd59af0fe5eb9c23cfDouglas Gregor ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope); 582a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 583b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Tell the actions module that we have entered a function definition with the 584b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // specified Declarator for the function. 585b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner DeclTy *Res = Actions.ActOnStartOfFunctionDef(CurScope, D); 586a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5877ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // If we have a colon, then we're probably parsing a C++ 5887ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // ctor-initializer. 5897ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (Tok.is(tok::colon)) 5907ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor ParseConstructorInitializer(Res); 5917ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor 5927ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor SourceLocation BraceLoc = Tok.getLocation(); 593a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump return ParseFunctionStatementBody(Res, BraceLoc, BraceLoc); 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// types for a function with a K&R-style identifier list for arguments. 5985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseKNRParamDeclarations(Declarator &D) { 5995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that the top-level of this declarator is a function. 6005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; 6015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 60204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Enter function-declaration scope, limiting any declarators to the 60304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // function prototype scope, including parameter declarators. 6043218c4bb3b5d7250f12420de6db7ef3e3f805a75Douglas Gregor ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope|Scope::DeclScope); 60504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 6065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read all the argument declarations. 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (isDeclarationSpecifier()) { 6085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation DSStart = Tok.getLocation(); 609a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 6115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 6125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 613a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: 'each declaration in the declaration list shall have at 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // least one declarator'. 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // NOTE: GCC just makes this an ext-warn. It's not clear what it does with 6175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the declarations though. It's trivial to ignore them, really hard to do 6185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // anything else with them. 619000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 6205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DSStart, diag::err_declaration_does_not_declare_param); 6215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 6235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 624a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other 6265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // than register. 6275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && 6285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getStorageClassSpec() != DeclSpec::SCS_register) { 6295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getStorageClassSpecLoc(), 6305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 6325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.isThreadSpecified()) { 6345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getThreadSpecLoc(), 6355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 6365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 6375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 638a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator attached to this declspec. 6405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext); 6415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 6425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Handle the full declarator list. 6445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 6455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclTy *AttrList; 6465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If attributes are present, parse them. 647000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::kw___attribute)) 6485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: attach attributes too. 6495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AttrList = ParseAttributes(); 650a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ask the actions module to compute the type for this declarator. 652a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump Action::DeclTy *Param = 65304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Actions.ActOnParamDeclarator(CurScope, ParmDeclarator); 6542bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff 655a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump if (Param && 6565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // A missing identifier has already been diagnosed. 6575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()) { 6585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan the argument list looking for the correct param to apply this 6605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // type. 6615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; ; ++i) { 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: those declarators shall declare only identifiers from 6635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the identifier list. 6645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (i == FTI.NumArgs) { 6651ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param) 6666898e33d0b28346a4dbe9a666e0e4188fea80460Chris Lattner << ParmDeclarator.getIdentifier(); 6675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 669a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) { 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reject redefinitions of parameters. 67204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner if (FTI.ArgInfo[i].Param) { 6735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ParmDeclarator.getIdentifierLoc(), 6741ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner diag::err_param_redefinition) 6756898e33d0b28346a4dbe9a666e0e4188fea80460Chris Lattner << ParmDeclarator.getIdentifier(); 6765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 67704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner FTI.ArgInfo[i].Param = Param; 6785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 6805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we don't have a comma, it is either the end of the list (a ';') or 6855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // an error, bail out. 686000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::comma)) 6875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 688a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Consume the comma. 6905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 691a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the next declarator. 6935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.clear(); 6945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 696a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 697000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 6985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 7005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_parse_error); 7015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip to end of block or statement 7025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi, true); 703000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 7045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 7055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 707a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The actions module must verify that all arguments were declared. 709be109b3e768b70f9efb106d25d6b5a2c72c5a9b8Douglas Gregor Actions.ActOnFinishKNRParamDeclarations(CurScope, D); 7105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseAsmStringLiteral - This is just a normal string-literal, but is not 7145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// allowed to be a wide string, and is not subject to character translation. 7155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 7165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-string-literal: 7175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal 7185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 719effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian RedlParser::OwningExprResult Parser::ParseAsmStringLiteral() { 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isTokenStringLiteral()) { 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_string_literal); 72261364dddc33383e62cfe3b841dbc0f471280d95bSebastian Redl return ExprError(); 7235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 724a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 72520df9b7ab9388b2a488c5b1293cd196b1e073b4eSebastian Redl OwningExprResult Res(ParseStringLiteralExpression()); 726effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl if (Res.isInvalid()) return move(Res); 727a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Diagnose: wide string literal in 'asm' 729a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 730effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return move(Res); 7315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseSimpleAsm 7345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 7355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] simple-asm-expr: 7365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 'asm' '(' asm-string-literal ')' 7375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 738ab197baec16bacade82325fb274cf6b992ac5d8aSebastian RedlParser::OwningExprResult Parser::ParseSimpleAsm(SourceLocation *EndLoc) { 739000732226610650837478cba97843d19b75f648eChris Lattner assert(Tok.is(tok::kw_asm) && "Not an asm!"); 740dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson SourceLocation Loc = ConsumeToken(); 741a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 742000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_paren)) { 7431ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(Tok, diag::err_expected_lparen_after) << "asm"; 74461364dddc33383e62cfe3b841dbc0f471280d95bSebastian Redl return ExprError(); 7455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 746a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 747ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl Loc = ConsumeParen(); 748a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 749effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl OwningExprResult Result(ParseAsmStringLiteral()); 750a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 751ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl if (Result.isInvalid()) { 752ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl SkipUntil(tok::r_paren, true, true); 753ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl if (EndLoc) 754ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl *EndLoc = Tok.getLocation(); 755ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl ConsumeAnyToken(); 756ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl } else { 757ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl Loc = MatchRHSPunctuation(tok::r_paren, Loc); 758ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl if (EndLoc) 759ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl *EndLoc = Loc; 760ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl } 761a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 762effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return move(Result); 7635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 765eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateTypeOrScopeToken - If the current token position is on a 766eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typename (possibly qualified in C++) or a C++ scope specifier not followed 767eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens 768eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// with a single annotation token representing the typename or C++ scope 769eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// respectively. 770eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// This simplifies handling of C++ scope specifiers and allows efficient 771eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// backtracking without the need to re-parse and resolve nested-names and 772eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typenames. 77344802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// It will mainly be called when we expect to treat identifiers as typenames 77444802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// (if they are typenames). For example, in C we do not expect identifiers 77544802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// inside expressions to be treated as typenames so it will not be called 77644802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// for expressions in C. 77744802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// The benefit for C/ObjC is that a typename will be annotated and 778b43a50ff1b0b171ece84425b0ad83a9a31f038faSteve Naroff/// Actions.getTypeName will not be needed to be called again (e.g. getTypeName 77944802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// will not be called twice, once to check whether we have a declaration 78044802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// specifier, and another one to get the actual type inside 78144802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// ParseDeclarationSpecifiers). 782a7bc7c880f86bc180684ef032d06df51bcae7a23Chris Lattner/// 783a7bc7c880f86bc180684ef032d06df51bcae7a23Chris Lattner/// This returns true if the token was annotated. 78455a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// 78555a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// Note that this routine emits an error if you call it with ::new or ::delete 78655a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// as the current tokens, so only call it in contexts where these are invalid. 7875b4547318bb179fc76f984f0eeaaf615927e795cChris Lattnerbool Parser::TryAnnotateTypeOrScopeToken() { 7887452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && 7897452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner "Cannot be a type or scope token!"); 7907452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner 7917452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner // FIXME: Implement template-ids 792eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis CXXScopeSpec SS; 7934bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis if (getLang().CPlusPlus) 7947a0ab5f387722c83e19c7133b46b16988eb19e45Chris Lattner ParseOptionalCXXScopeSpecifier(SS); 795eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 796eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::identifier)) { 797608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // Determine whether the identifier is a type name. 798b43a50ff1b0b171ece84425b0ad83a9a31f038faSteve Naroff if (TypeTy *Ty = Actions.getTypeName(*Tok.getIdentifierInfo(), 799b696ea3a0693798daeafd896d77f0b8f1fec3cc5Douglas Gregor Tok.getLocation(), CurScope, &SS)) { 800608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // This is a typename. Replace the current token in-place with an 801608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // annotation type token. 802b31757b68afe06ba442a05775d08fe7aa0f6f889Chris Lattner Tok.setKind(tok::annot_typename); 803608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Tok.setAnnotationValue(Ty); 804608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Tok.setAnnotationEndLoc(Tok.getLocation()); 805608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner if (SS.isNotEmpty()) // it was a C++ qualified type name. 806608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Tok.setLocation(SS.getBeginLoc()); 807608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner 808608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // In case the tokens were cached, have Preprocessor replace 809608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // them with the annotation token. 810608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner PP.AnnotateCachedTokens(Tok); 811608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner return true; 81239a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor } 81339a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor 81439a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor if (!getLang().CPlusPlus) { 815608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // If we're in C, we can't have :: tokens at all (the lexer won't return 816608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // them). If the identifier is not a type, then it can't be scope either, 817608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // just early exit. 818608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner return false; 819eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 820608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner 82139a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // If this is a template-id, annotate with a template-id or type token. 82255f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor if (NextToken().is(tok::less)) { 82355f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor DeclTy *Template; 82455f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor if (TemplateNameKind TNK 82555f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor = Actions.isTemplateName(*Tok.getIdentifierInfo(), 82639a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor CurScope, Template, &SS)) 82755f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor AnnotateTemplateIdToken(Template, TNK, &SS); 82855f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor } 829d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor 83039a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // The current token, which is either an identifier or a 83139a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // template-id, is not part of the annotation. Fall through to 83239a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // push that token back into the stream and complete the C++ scope 83339a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // specifier annotation. 834eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 835eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 83639a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor if (Tok.is(tok::annot_template_id)) { 83739a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor TemplateIdAnnotation *TemplateId 83839a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 83939a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor if (TemplateId->Kind == TNK_Class_template) { 84039a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // A template-id that refers to a type was parsed into a 84139a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // template-id annotation in a context where we weren't allowed 84239a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // to produce a type annotation token. Update the template-id 84339a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // annotation token to a type annotation token now. 84439a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor return !AnnotateTemplateIdTokenAsType(&SS); 84539a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor } 84639a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor } 847d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor 8486ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner if (SS.isEmpty()) 849a7bc7c880f86bc180684ef032d06df51bcae7a23Chris Lattner return false; 8506ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner 8516ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // A C++ scope specifier that isn't followed by a typename. 8526ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // Push the current token back into the token stream (or revert it if it is 8536ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // cached) and use an annotation scope token for current token. 8546ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner if (PP.isBacktrackEnabled()) 8556ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.RevertCachedTokens(1); 8566ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner else 8576ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.EnterToken(Tok); 8586ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setKind(tok::annot_cxxscope); 8596ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setAnnotationValue(SS.getScopeRep()); 8606ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setAnnotationRange(SS.getRange()); 8616ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner 8626ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // In case the tokens were cached, have Preprocessor replace them with the 8636ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // annotation token. 8646ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.AnnotateCachedTokens(Tok); 865a7bc7c880f86bc180684ef032d06df51bcae7a23Chris Lattner return true; 866eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 867eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 868eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only 86939a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor/// annotates C++ scope specifiers and template-ids. This returns 87039a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor/// true if the token was annotated. 87155a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// 87255a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// Note that this routine emits an error if you call it with ::new or ::delete 87355a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// as the current tokens, so only call it in contexts where these are invalid. 8745e02c47a7085831586344a9728763cb50540c7f7Chris Lattnerbool Parser::TryAnnotateCXXScopeToken() { 8754bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis assert(getLang().CPlusPlus && 8766ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner "Call sites of this function should be guarded by checking for C++"); 8777452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && 8787452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner "Cannot be a type or scope token!"); 879eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 8804bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis CXXScopeSpec SS; 8817a0ab5f387722c83e19c7133b46b16988eb19e45Chris Lattner if (!ParseOptionalCXXScopeSpecifier(SS)) 88239a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor return Tok.is(tok::annot_template_id); 883eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 8846ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // Push the current token back into the token stream (or revert it if it is 8856ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // cached) and use an annotation scope token for current token. 8866ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner if (PP.isBacktrackEnabled()) 8876ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.RevertCachedTokens(1); 8886ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner else 8896ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.EnterToken(Tok); 8906ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setKind(tok::annot_cxxscope); 8916ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setAnnotationValue(SS.getScopeRep()); 8926ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setAnnotationRange(SS.getRange()); 8936ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner 8946ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // In case the tokens were cached, have Preprocessor replace them with the 8956ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // annotation token. 8966ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.AnnotateCachedTokens(Tok); 8975e02c47a7085831586344a9728763cb50540c7f7Chris Lattner return true; 898eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 899