Parser.cpp revision 45f965581935791a018df829a14dff53c1dd8f47
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" 180102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner#include "llvm/Support/raw_ostream.h" 19c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner#include "ExtensionRAIIObject.h" 20fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar#include "ParsePragma.h" 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 232e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor/// \brief A comment handler that passes comments found by the preprocessor 242e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor/// to the parser action. 252e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregorclass ActionCommentHandler : public CommentHandler { 262e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor Action &Actions; 272e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor 282e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregorpublic: 292e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor explicit ActionCommentHandler(Action &Actions) : Actions(Actions) { } 302e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor 312e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor virtual void HandleComment(Preprocessor &PP, SourceRange Comment) { 322e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor Actions.ActOnComment(Comment); 332e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor } 342e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor}; 352e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::Parser(Preprocessor &pp, Action &actions) 370102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner : CrashInfo(*this), PP(pp), Actions(actions), Diags(PP.getDiagnostics()), 38b13bc41a8b0e2d8b7f7d824d5836ce5ae0b8ae5fDouglas Gregor GreaterThanIsOperator(true), TemplateParameterDepth(0) { 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Tok.setKind(tok::eof); 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = 0; 419e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner NumCachedScopes = 0; 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParenCount = BracketCount = BraceCount = 0; 43b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner ObjCImpDecl = DeclPtrTy(); 44fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 45fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // Add #pragma handlers. These are removed and destroyed in the 46fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // destructor. 474726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek PackHandler.reset(new 484726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek PragmaPackHandler(&PP.getIdentifierTable().get("pack"), actions)); 494726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek PP.AddPragmaHandler(0, PackHandler.get()); 504726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek 514726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek UnusedHandler.reset(new 524726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek PragmaUnusedHandler(&PP.getIdentifierTable().get("unused"), actions, 534726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek *this)); 544726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek PP.AddPragmaHandler(0, UnusedHandler.get()); 559991479ad5dde617168cc1e4b18425cdbbfd9fa9Eli Friedman 569991479ad5dde617168cc1e4b18425cdbbfd9fa9Eli Friedman WeakHandler.reset(new 579991479ad5dde617168cc1e4b18425cdbbfd9fa9Eli Friedman PragmaWeakHandler(&PP.getIdentifierTable().get("weak"), actions)); 589991479ad5dde617168cc1e4b18425cdbbfd9fa9Eli Friedman PP.AddPragmaHandler(0, WeakHandler.get()); 592e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor 602e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor CommentHandler.reset(new ActionCommentHandler(actions)); 612e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor PP.AddCommentHandler(CommentHandler.get()); 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 640102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner/// If a crash happens while the parser is active, print out a line indicating 650102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner/// what the current token is. 660102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattnervoid PrettyStackTraceParserEntry::print(llvm::raw_ostream &OS) const { 670102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner const Token &Tok = P.getCurToken(); 68ddcbc0a72a04a5ae2493088f1437200a9ea480b1Chris Lattner if (Tok.is(tok::eof)) { 690102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner OS << "<eof> parser at end of file\n"; 700102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner return; 710102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner } 720102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner 73ddcbc0a72a04a5ae2493088f1437200a9ea480b1Chris Lattner if (Tok.getLocation().isInvalid()) { 74ddcbc0a72a04a5ae2493088f1437200a9ea480b1Chris Lattner OS << "<unknown> parser at unknown location\n"; 75ddcbc0a72a04a5ae2493088f1437200a9ea480b1Chris Lattner return; 76ddcbc0a72a04a5ae2493088f1437200a9ea480b1Chris Lattner } 77ddcbc0a72a04a5ae2493088f1437200a9ea480b1Chris Lattner 780102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner const Preprocessor &PP = P.getPreprocessor(); 790102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner Tok.getLocation().print(OS, PP.getSourceManager()); 800102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner OS << ": current parser token '" << PP.getSpelling(Tok) << "'\n"; 81f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor} 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 830102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner 843cbfe2c4159e0a219ae660d50625c013aa4afbd0Chris LattnerDiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) { 850102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner return Diags.Report(FullSourceLoc(Loc, PP.getSourceManager()), DiagID); 861ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner} 871ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner 883cbfe2c4159e0a219ae660d50625c013aa4afbd0Chris LattnerDiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) { 891ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner return Diag(Tok.getLocation(), DiagID); 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 924b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// \brief Emits a diagnostic suggesting parentheses surrounding a 934b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// given range. 944b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// 954b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// \param Loc The location where we'll emit the diagnostic. 964b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// \param Loc The kind of diagnostic to emit. 974b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// \param ParenRange Source range enclosing code that should be parenthesized. 984b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregorvoid Parser::SuggestParentheses(SourceLocation Loc, unsigned DK, 994b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor SourceRange ParenRange) { 100b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor SourceLocation EndLoc = PP.getLocForEndOfToken(ParenRange.getEnd()); 101b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor if (!ParenRange.getEnd().isFileID() || EndLoc.isInvalid()) { 1024b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor // We can't display the parentheses, so just dig the 1034b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor // warning/error and return. 1044b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor Diag(Loc, DK); 1054b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor return; 1064b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor } 1074b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor 1084b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor Diag(Loc, DK) 109b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor << CodeModificationHint::CreateInsertion(ParenRange.getBegin(), "(") 110b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor << CodeModificationHint::CreateInsertion(EndLoc, ")"); 1114b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor} 1124b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// MatchRHSPunctuation - For punctuation with a LHS and RHS (e.g. '['/']'), 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// this helper function matches and consumes the specified RHS token if 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// present. If not present, it emits the specified diagnostic indicating 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the parser failed to match the RHS of the token at LHSLoc. LHSName 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// should be the name of the unmatched LHS token. 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerSourceLocation Parser::MatchRHSPunctuation(tok::TokenKind RHSTok, 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation LHSLoc) { 120a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 121000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(RHSTok)) 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ConsumeAnyToken(); 123a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation R = Tok.getLocation(); 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *LHSName = "unknown"; 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::kind DID = diag::err_parse_error; 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (RHSTok) { 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: break; 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break; 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break; 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break; 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greater: LHSName = "<"; DID = diag::err_expected_greater; break; 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, DID); 13528eb7e992b9a266abb300da25b6d3c1557cec361Chris Lattner Diag(LHSLoc, diag::note_matching) << LHSName; 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(RHSTok); 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return R; 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// input. If so, it is consumed and false is returned. 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If the input is malformed, this emits the specified diagnostic. Next, if 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// returned. 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID, 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *Msg, tok::TokenKind SkipToTok) { 148000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(ExpectedTok)) { 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 152a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1534b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor const char *Spelling = 0; 154b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation); 155b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor if (EndLoc.isValid() && 156b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor (Spelling = tok::getTokenSimpleSpelling(ExpectedTok))) { 1574b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor // Show what code to insert to fix this problem. 158b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor Diag(EndLoc, DiagID) 1594b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor << Msg 160b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor << CodeModificationHint::CreateInsertion(EndLoc, Spelling); 1614b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor } else 1624b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor Diag(Tok, DiagID) << Msg; 1634b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (SkipToTok != tok::unknown) 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(SkipToTok); 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Error recovery. 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipUntil - Read tokens until we get to the specified token, then consume 174012cf464254804279efa84e21b4b493dde76c5f1Chris Lattner/// it (unless DontConsume is true). Because we cannot guarantee that the 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// token will ever occur, this skips to the next token, or to some likely 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// good stopping point. If StopAtSemi is true, skipping will stop at a ';' 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character. 178a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If SkipUntil finds the specified token, it returns true, otherwise it 180a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// returns false. 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::SkipUntil(const tok::TokenKind *Toks, unsigned NumToks, 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool StopAtSemi, bool DontConsume) { 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We always want this function to skip at least one token if the first token 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // isn't T and if not at EOF. 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isFirstTokenSkipped = true; 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we found one of the tokens, stop and return true. 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; i != NumToks; ++i) { 189000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(Toks[i])) { 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DontConsume) { 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Noop, don't consume the token. 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 198a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::eof: 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ran out of tokens. 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 203a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_paren: 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested parens. 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_paren, false); 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_square: 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested square brackets. 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_square, false); 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_brace: 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested braces. 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 2175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_brace, false); 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 219a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Okay, we found a ']' or '}' or ')', which we think should be balanced. 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Since the user wasn't looking for this token (if they were, it would 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // already be handled), this isn't balanced. If there is a LHS token at a 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // higher level, we will assume that this matches the unbalanced token 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and return it. Otherwise, this is a spurious RHS token, which we skip. 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren: 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ParenCount && !isFirstTokenSkipped) 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 2285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BracketCount && !isFirstTokenSkipped) 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace: 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BraceCount && !isFirstTokenSkipped) 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 240a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::string_literal: 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::wide_string_literal: 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeStringToken(); 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StopAtSemi) 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 2485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip this token. 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isFirstTokenSkipped = false; 255a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump } 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Scope manipulation 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// EnterScope - Start a new scope. 2635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::EnterScope(unsigned ScopeFlags) { 2649e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes) { 2659e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *N = ScopeCache[--NumCachedScopes]; 2665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer N->Init(CurScope, ScopeFlags); 2675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = N; 2685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = new Scope(CurScope, ScopeFlags); 2705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExitScope - Pop a scope off the scope stack. 2745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ExitScope() { 2755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope && "Scope imbalance!"); 2765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 27790ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // Inform the actions module that this scope is going away if there are any 27890ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // decls in it. 27990ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner if (!CurScope->decl_empty()) 280b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnPopScope(Tok.getLocation(), CurScope); 281a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2829e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *OldScope = CurScope; 2839e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner CurScope = OldScope->getParent(); 284a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2859e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes == ScopeCacheSize) 2869e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete OldScope; 2875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 2889e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner ScopeCache[NumCachedScopes++] = OldScope; 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// C99 6.9: External Definitions. 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::~Parser() { 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we still have scopes active, delete the scope tree. 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete CurScope; 301a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Free the scope cache. 3039e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner for (unsigned i = 0, e = NumCachedScopes; i != e; ++i) 3049e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete ScopeCache[i]; 305fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 306fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // Remove the pragma handlers we installed. 3074726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek PP.RemovePragmaHandler(0, PackHandler.get()); 3084726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek PackHandler.reset(); 3094726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek PP.RemovePragmaHandler(0, UnusedHandler.get()); 3104726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek UnusedHandler.reset(); 3119991479ad5dde617168cc1e4b18425cdbbfd9fa9Eli Friedman PP.RemovePragmaHandler(0, WeakHandler.get()); 3129991479ad5dde617168cc1e4b18425cdbbfd9fa9Eli Friedman WeakHandler.reset(); 3132e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor PP.RemoveCommentHandler(CommentHandler.get()); 3145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Initialize - Warm up the parser. 3175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::Initialize() { 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Prime the lexer look-ahead. 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 321a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 32231e057270232c1c37602579cb6461c2704175672Chris Lattner // Create the translation unit scope. Install it as the current scope. 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope == 0 && "A scope is already active?"); 32431e057270232c1c37602579cb6461c2704175672Chris Lattner EnterScope(Scope::DeclScope); 325b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnTranslationUnitScope(Tok.getLocation(), CurScope); 326a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 327000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::eof) && 328f72617544287acf0281c3b1a733bcb22a02e6ca4Chris Lattner !getLang().CPlusPlus) // Empty source file is an extension in C 3295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_empty_source_file); 330a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 33134870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner // Initialization for Objective-C context sensitive keywords recognition. 332a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek // Referenced in Parser::ParseObjCTypeQualifierList. 33334870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner if (getLang().ObjC1) { 334a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in"); 335a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out"); 336a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout"); 337a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway"); 338a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy"); 339a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref"); 34034870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner } 341662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar 342662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar Ident_super = &PP.getIdentifierTable().get("super"); 3435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTopLevelDecl - Parse one top-level declaration, return whatever the 3465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// action tells us to. This returns true if the EOF was encountered. 347682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattnerbool Parser::ParseTopLevelDecl(DeclGroupPtrTy &Result) { 348682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner Result = DeclGroupPtrTy(); 3499299f3fa85796613cc787a2062c9562d07c8613eChris Lattner if (Tok.is(tok::eof)) { 3509299f3fa85796613cc787a2062c9562d07c8613eChris Lattner Actions.ActOnEndOfTranslationUnit(); 3519299f3fa85796613cc787a2062c9562d07c8613eChris Lattner return true; 3529299f3fa85796613cc787a2062c9562d07c8613eChris Lattner } 353a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 35489307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = ParseExternalDeclaration(); 3555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 3565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTranslationUnit: 3595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// translation-unit: [C99 6.9] 360a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// external-declaration 361a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// translation-unit external-declaration 3625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseTranslationUnit() { 3638935b8b49053122ddd3ab4cd59af0fe5eb9c23cfDouglas Gregor Initialize(); 364a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 365682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DeclGroupPtrTy Res; 36689307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff while (!ParseTopLevelDecl(Res)) 3675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /*parse them all*/; 36806f548596beef4c0a227a45cba996497f99566c0Chris Lattner 36906f548596beef4c0a227a45cba996497f99566c0Chris Lattner ExitScope(); 37006f548596beef4c0a227a45cba996497f99566c0Chris Lattner assert(CurScope == 0 && "Scope imbalance!"); 3715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseExternalDeclaration: 37490b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner/// 375c19923dda3d28f67aab4726cd40bb07032758383Douglas Gregor/// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl] 376c3018153a11afe91849748a93d920040a571b76cChris Lattner/// function-definition 377c3018153a11afe91849748a93d920040a571b76cChris Lattner/// declaration 378a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor/// [C++0x] empty-declaration 3795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition 380c3018153a11afe91849748a93d920040a571b76cChris Lattner/// [GNU] __extension__ external-declaration 3815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-definition 3825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-declaration 3835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-alias-declaration 3845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-protocol-definition 3855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-method-definition 3865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] @end 387c19923dda3d28f67aab4726cd40bb07032758383Douglas Gregor/// [C++] linkage-specification 3885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition: 3895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// simple-asm-expr ';' 3905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 391a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor/// [C++0x] empty-declaration: 392a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor/// ';' 393a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor/// 39445f965581935791a018df829a14dff53c1dd8f47Douglas Gregor/// [C++0x/GNU] 'extern' 'template' declaration 395682bf92db408a6cbc3d37b5496a99b6ef85041ecChris LattnerParser::DeclGroupPtrTy Parser::ParseExternalDeclaration() { 396682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DeclPtrTy SingleDecl; 3975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 3985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 399a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor if (!getLang().CPlusPlus0x) 400a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor Diag(Tok, diag::ext_top_level_semi) 401a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor << CodeModificationHint::CreateRemoval(SourceRange(Tok.getLocation())); 402a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor 4035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Invoke action for top-level semicolon. 405682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 40690b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner case tok::r_brace: 40790b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner Diag(Tok, diag::err_expected_external_declaration); 40890b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner ConsumeBrace(); 409682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 41090b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner case tok::eof: 41190b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner Diag(Tok, diag::err_expected_external_declaration); 412682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 413c3018153a11afe91849748a93d920040a571b76cChris Lattner case tok::kw___extension__: { 414c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner // __extension__ silences extension warnings in the subexpression. 415c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner ExtensionRAIIObject O(Diags); // Use RAII to do this. 41639146d6497ad5e7ca8ef639221e7b3e15d07c888Chris Lattner ConsumeToken(); 417c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner return ParseExternalDeclaration(); 418c3018153a11afe91849748a93d920040a571b76cChris Lattner } 419dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson case tok::kw_asm: { 420effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl OwningExprResult Result(ParseSimpleAsm()); 421a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 4223f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 4233f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson "top-level asm block"); 424dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson 425682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner if (Result.isInvalid()) 426682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 427682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner SingleDecl = Actions.ActOnFileScopeAsmDecl(Tok.getLocation(), move(Result)); 428682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner break; 429dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson } 4305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::at: 431682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // @ is not a legal token unless objc is enabled, no need to check for ObjC. 432682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner /// FIXME: ParseObjCAtDirectives should return a DeclGroup for things like 433682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner /// @class foo, bar; 434682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner SingleDecl = ParseObjCAtDirectives(); 435682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner break; 4365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::minus: 4375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::plus: 438682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner if (!getLang().ObjC1) { 439682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner Diag(Tok, diag::err_expected_external_declaration); 440682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner ConsumeToken(); 441682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 442682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner } 443682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner SingleDecl = ParseObjCMethodDefinition(); 444682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner break; 445f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor case tok::kw_using: 4468f08cb7d0b97786b17ef05e05caa55aad4d6bd39Chris Lattner case tok::kw_namespace: 4475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::kw_typedef: 448adcac8824a9cff13f1ef61a69e38c1041cba12eeDouglas Gregor case tok::kw_template: 449adcac8824a9cff13f1ef61a69e38c1041cba12eeDouglas Gregor case tok::kw_export: // As in 'export template' 450511d7aba3b12853fdb88729a0313b80a60eab8adAnders Carlsson case tok::kw_static_assert: 451bae35118fc5cea2da08567dbb9763af7f906dae2Chris Lattner // A function definition cannot start with a these keywords. 45297144fc41a9419bf6d74fc9450e8ef3f6e11f7e0Chris Lattner { 45397144fc41a9419bf6d74fc9450e8ef3f6e11f7e0Chris Lattner SourceLocation DeclEnd; 45497144fc41a9419bf6d74fc9450e8ef3f6e11f7e0Chris Lattner return ParseDeclaration(Declarator::FileContext, DeclEnd); 45597144fc41a9419bf6d74fc9450e8ef3f6e11f7e0Chris Lattner } 45645f965581935791a018df829a14dff53c1dd8f47Douglas Gregor case tok::kw_extern: 45745f965581935791a018df829a14dff53c1dd8f47Douglas Gregor if (getLang().CPlusPlus && NextToken().is(tok::kw_template)) { 45845f965581935791a018df829a14dff53c1dd8f47Douglas Gregor // Extern templates 45945f965581935791a018df829a14dff53c1dd8f47Douglas Gregor SourceLocation ExternLoc = ConsumeToken(); 46045f965581935791a018df829a14dff53c1dd8f47Douglas Gregor SourceLocation TemplateLoc = ConsumeToken(); 46145f965581935791a018df829a14dff53c1dd8f47Douglas Gregor SourceLocation DeclEnd; 46245f965581935791a018df829a14dff53c1dd8f47Douglas Gregor return Actions.ConvertDeclToDeclGroup( 46345f965581935791a018df829a14dff53c1dd8f47Douglas Gregor ParseExplicitInstantiation(ExternLoc, TemplateLoc, DeclEnd)); 46445f965581935791a018df829a14dff53c1dd8f47Douglas Gregor } 46545f965581935791a018df829a14dff53c1dd8f47Douglas Gregor 46645f965581935791a018df829a14dff53c1dd8f47Douglas Gregor // FIXME: Detect C++ linkage specifications here? 46745f965581935791a018df829a14dff53c1dd8f47Douglas Gregor 46845f965581935791a018df829a14dff53c1dd8f47Douglas Gregor // Fall through to handle other declarations or function definitions. 46945f965581935791a018df829a14dff53c1dd8f47Douglas Gregor 4705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 4715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We can't tell whether this is a function-definition or declaration yet. 4725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclarationOrFunctionDefinition(); 4735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 474682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner 475682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // This routine returns a DeclGroup, if the thing we parsed only contains a 476682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // single decl, convert it now. 477682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return Actions.ConvertDeclToDeclGroup(SingleDecl); 4785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4801426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor/// \brief Determine whether the current token, if it occurs after a 4811426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor/// declarator, continues a declaration or declaration list. 4821426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregorbool Parser::isDeclarationAfterDeclarator() { 4831426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor return Tok.is(tok::equal) || // int X()= -> not a function def 4841426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor Tok.is(tok::comma) || // int X(), -> not a function def 4851426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor Tok.is(tok::semi) || // int X(); -> not a function def 4861426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def 4871426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def 4881426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor (getLang().CPlusPlus && 4891426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor Tok.is(tok::l_paren)); // int X(0) -> not a function def [C++] 4901426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor} 4911426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor 4921426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor/// \brief Determine whether the current token, if it occurs after a 4931426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor/// declarator, indicates the start of a function definition. 4941426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregorbool Parser::isStartOfFunctionDefinition() { 4951426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor return Tok.is(tok::l_brace) || // int X() {} 4961426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor (!getLang().CPlusPlus && 4971426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor isDeclarationSpecifier()) || // int X(f) int f; {} 4981426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor (getLang().CPlusPlus && 4991426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor (Tok.is(tok::colon) || // X() : Base() {} (used for ctors) 5001426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor Tok.is(tok::kw_try))); // X() try { ... } 5011426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor} 5021426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor 5035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or 5045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a declaration. We can't tell which we have until we read up to the 505c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor/// compound-statement in function-definition. TemplateParams, if 506c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor/// non-NULL, provides the template parameters when we're parsing a 507c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor/// C++ template-declaration. 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// function-definition: [C99 6.9.1] 510a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 511a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 512a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 513a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// 5145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// declaration: [C99 6.7] 515697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// declaration-specifiers init-declarator-list[opt] ';' 516697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// [!C99] init-declarator-list ';' [TODO: warn in c99 mode] 5175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OMP] threadprivate-directive [TODO] 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 519682bf92db408a6cbc3d37b5496a99b6ef85041ecChris LattnerParser::DeclGroupPtrTy 520709131972f67190edd310ef72bd5e8c9a7764823Douglas GregorParser::ParseDeclarationOrFunctionDefinition(AccessSpecifier AS) { 5215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 5225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 5234d9a16f36d3b768672d50e6d02000f982ae448d7Douglas Gregor ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS); 524a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 5265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // declaration-specifiers init-declarator-list[opt] ';' 527000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 5285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 529682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DeclPtrTy TheDecl = Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 530682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return Actions.ConvertDeclToDeclGroup(TheDecl); 5315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 532a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 533246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // ObjC2 allows prefix attributes on class interfaces and protocols. 534246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // FIXME: This still needs better diagnostics. We should only accept 535246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // attributes here, no types, etc. 536000732226610650837478cba97843d19b75f648eChris Lattner if (getLang().ObjC2 && Tok.is(tok::at)) { 537dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff SourceLocation AtLoc = ConsumeToken(); // the "@" 538246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (!Tok.isObjCAtKeyword(tok::objc_interface) && 539246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar !Tok.isObjCAtKeyword(tok::objc_protocol)) { 540246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar Diag(Tok, diag::err_objc_unexpected_attr); 541cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner SkipUntil(tok::semi); // FIXME: better skip? 542682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 543cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner } 5440de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian const char *PrevSpec = 0; 545fec54013fcd0eb72642741584ca04c1bc292bef8John McCall unsigned DiagID; 546fec54013fcd0eb72642741584ca04c1bc292bef8John McCall if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec, DiagID)) 547fec54013fcd0eb72642741584ca04c1bc292bef8John McCall Diag(AtLoc, DiagID) << PrevSpec; 548682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner 549682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DeclPtrTy TheDecl; 550246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (Tok.isObjCAtKeyword(tok::objc_protocol)) 551682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner TheDecl = ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes()); 552682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner else 553682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner TheDecl = ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()); 554682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return Actions.ConvertDeclToDeclGroup(TheDecl); 555dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff } 556a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 557c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // If the declspec consisted only of 'extern' and we have a string 558c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // literal following it, this must be a C++ linkage specifier like 559c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // 'extern "C"'. 5603c6f6a7a1bb9969112617a26d2333bab2f6efd65Chris Lattner if (Tok.is(tok::string_literal) && getLang().CPlusPlus && 561c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getStorageClassSpec() == DeclSpec::SCS_extern && 562682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) { 563682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DeclPtrTy TheDecl = ParseLinkage(Declarator::FileContext); 564682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return Actions.ConvertDeclToDeclGroup(TheDecl); 565682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner } 566c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 5675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator. 5685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator DeclaratorInfo(DS, Declarator::FileContext); 5695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(DeclaratorInfo); 5705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Error parsing the declarator? 57110bd36882406cdf4805e35add1ce2f11ab9ae152Douglas Gregor if (!DeclaratorInfo.hasName()) { 5725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If so, skip until the semi-colon or a }. 573cb43d999520f547d682a1ca280ecfedb115ee1fdDouglas Gregor SkipUntil(tok::r_brace, true, true); 574000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 5755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 576682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 5775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5791426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor // If we have a declaration or declarator list, handle it. 5801426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor if (isDeclarationAfterDeclarator()) { 581682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // Parse the init-declarator-list for a normal declaration. 58223c4b1883b13dc17484b7214091b73f3ba29096eChris Lattner DeclGroupPtrTy DG = 58323c4b1883b13dc17484b7214091b73f3ba29096eChris Lattner ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo); 58423c4b1883b13dc17484b7214091b73f3ba29096eChris Lattner // Eat the semi colon after the declaration. 5855c15fe1f59a08c6e2215f99a3b251e14c73b36e2John McCall ExpectAndConsume(tok::semi, diag::err_expected_semi_declaration); 58623c4b1883b13dc17484b7214091b73f3ba29096eChris Lattner return DG; 587682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner } 588682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner 589682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner if (DeclaratorInfo.isFunctionDeclarator() && 5901426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor isStartOfFunctionDefinition()) { 591e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 592e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff Diag(Tok, diag::err_function_declared_typedef); 593a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 594e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff if (Tok.is(tok::l_brace)) { 595e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // This recovery skips the entire function body. It would be nice 59672c3f314d92d65c050ee1c07b7753623c044d6c7Douglas Gregor // to simply call ParseFunctionDefinition() below, however Sema 597e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff // assumes the declarator represents a function, not a typedef. 598e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff ConsumeBrace(); 599e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::r_brace, true); 600e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } else { 601e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff SkipUntil(tok::semi); 602e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 603682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 604e39bfd0c52975dfb038413aa55147df2fc709ce2Steve Naroff } 605682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DeclPtrTy TheDecl = ParseFunctionDefinition(DeclaratorInfo); 606682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return Actions.ConvertDeclToDeclGroup(TheDecl); 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 608682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner 609682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner if (DeclaratorInfo.isFunctionDeclarator()) 610682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner Diag(Tok, diag::err_expected_fn_body); 611682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner else 612682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner Diag(Tok, diag::err_invalid_token_after_toplevel_declarator); 613682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner SkipUntil(tok::semi); 614682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseFunctionDefinition - We parsed and verified that the specified 6185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Declarator is well formed. If this is a K&R-style function, read the 6195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// parameters declaration-list, then start the compound-statement. 6205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 621a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// function-definition: [C99 6.9.1] 622a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 623a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 624a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 6257ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 62623c4b1883b13dc17484b7214091b73f3ba29096eChris Lattner/// decl-specifier-seq[opt] declarator ctor-initializer[opt] 62723c4b1883b13dc17484b7214091b73f3ba29096eChris Lattner/// function-body 6287ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 629d3a413d3b8eb39bcee5944bc545d9997c1abe492Sebastian Redl/// decl-specifier-seq[opt] declarator function-try-block 6305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 63152591bf224b2c43e2b00e265bb8599a620081925Douglas GregorParser::DeclPtrTy Parser::ParseFunctionDefinition(Declarator &D, 63252591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor const ParsedTemplateInfo &TemplateInfo) { 6335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0); 6345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(FnTypeInfo.Kind == DeclaratorChunk::Function && 6355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "This isn't a function declarator!"); 6365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun; 637a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 638a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // If this is C90 and the declspecs were completely missing, fudge in an 639a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // implicit int. We do this here because this is the only place where 640a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // declaration-specifiers are completely optional in the grammar. 6412a327d11a07dfbdf20910cebbae38910eda111fdChris Lattner if (getLang().ImplicitInt && D.getDeclSpec().isEmpty()) { 642a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner const char *PrevSpec; 643fec54013fcd0eb72642741584ca04c1bc292bef8John McCall unsigned DiagID; 64431c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int, 64531c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getIdentifierLoc(), 646fec54013fcd0eb72642741584ca04c1bc292bef8John McCall PrevSpec, DiagID); 647ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl D.SetRangeBegin(D.getDeclSpec().getSourceRange().getBegin()); 648a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner } 649a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this declaration was formed with a K&R-style identifier list for the 6515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // arguments, parse declarations for all of the args next. 6525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // int foo(a,b) int a; float b; {} 6535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!FTI.hasPrototype && FTI.NumArgs != 0) 6545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseKNRParamDeclarations(D); 6555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6567ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // We should have either an opening brace or, in a C++ constructor, 6577ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // we may have a colon. 658d3a413d3b8eb39bcee5944bc545d9997c1abe492Sebastian Redl if (Tok.isNot(tok::l_brace) && Tok.isNot(tok::colon) && 659d3a413d3b8eb39bcee5944bc545d9997c1abe492Sebastian Redl Tok.isNot(tok::kw_try)) { 6605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 6615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over garbage, until we get to '{'. Don't eat the '{'. 6635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::l_brace, true, true); 664a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we didn't find the '{', bail out. 666000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_brace)) 667b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner return DeclPtrTy(); 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 669a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 670b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Enter a scope for the function body. 6718935b8b49053122ddd3ab4cd59af0fe5eb9c23cfDouglas Gregor ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope); 672a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 673b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Tell the actions module that we have entered a function definition with the 674b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // specified Declarator for the function. 67552591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor DeclPtrTy Res = TemplateInfo.TemplateParams? 67652591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor Actions.ActOnStartOfFunctionTemplateDef(CurScope, 67752591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor Action::MultiTemplateParamsArg(Actions, 67852591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor TemplateInfo.TemplateParams->data(), 67952591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor TemplateInfo.TemplateParams->size()), 68052591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor D) 68152591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor : Actions.ActOnStartOfFunctionDef(CurScope, D); 682a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 683d3a413d3b8eb39bcee5944bc545d9997c1abe492Sebastian Redl if (Tok.is(tok::kw_try)) 684d3a413d3b8eb39bcee5944bc545d9997c1abe492Sebastian Redl return ParseFunctionTryBlock(Res); 685d3a413d3b8eb39bcee5944bc545d9997c1abe492Sebastian Redl 6867ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // If we have a colon, then we're probably parsing a C++ 6877ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // ctor-initializer. 6887ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (Tok.is(tok::colon)) 6897ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor ParseConstructorInitializer(Res); 6900849d38128536b0b33377d91bf02d005308319efFariborz Jahanian else 691393612e6c7727f1fee50039254d9f434364cc0b2Fariborz Jahanian Actions.ActOnDefaultCtorInitializers(Res); 6927ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor 69340e9bc84a2ab49fc33c2b1a95c6674ab2b820e9eChris Lattner return ParseFunctionStatementBody(Res); 6945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides 6975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// types for a function with a K&R-style identifier list for arguments. 6985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseKNRParamDeclarations(Declarator &D) { 6995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that the top-level of this declarator is a function. 7005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; 7015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 70204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Enter function-declaration scope, limiting any declarators to the 70304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // function prototype scope, including parameter declarators. 7043218c4bb3b5d7250f12420de6db7ef3e3f805a75Douglas Gregor ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope|Scope::DeclScope); 70504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 7065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read all the argument declarations. 7075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (isDeclarationSpecifier()) { 7085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation DSStart = Tok.getLocation(); 709a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 7115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 7125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 713a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: 'each declaration in the declaration list shall have at 7155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // least one declarator'. 7165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // NOTE: GCC just makes this an ext-warn. It's not clear what it does with 7175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the declarations though. It's trivial to ignore them, really hard to do 7185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // anything else with them. 719000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DSStart, diag::err_declaration_does_not_declare_param); 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 7225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 7235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 724a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other 7265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // than register. 7275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && 7285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getStorageClassSpec() != DeclSpec::SCS_register) { 7295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getStorageClassSpecLoc(), 7305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 7315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 7325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.isThreadSpecified()) { 7345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getThreadSpecLoc(), 7355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 7365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 7375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 738a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator attached to this declspec. 7405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext); 7415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 7425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Handle the full declarator list. 7445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 745b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner Action::AttrTy *AttrList; 7465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If attributes are present, parse them. 747000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::kw___attribute)) 7485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: attach attributes too. 7495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AttrList = ParseAttributes(); 750a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ask the actions module to compute the type for this declarator. 752b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner Action::DeclPtrTy Param = 75304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Actions.ActOnParamDeclarator(CurScope, ParmDeclarator); 7542bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff 755a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump if (Param && 7565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // A missing identifier has already been diagnosed. 7575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()) { 7585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan the argument list looking for the correct param to apply this 7605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // type. 7615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; ; ++i) { 7625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: those declarators shall declare only identifiers from 7635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the identifier list. 7645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (i == FTI.NumArgs) { 7651ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param) 7666898e33d0b28346a4dbe9a666e0e4188fea80460Chris Lattner << ParmDeclarator.getIdentifier(); 7675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 7685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 769a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) { 7715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reject redefinitions of parameters. 77204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner if (FTI.ArgInfo[i].Param) { 7735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ParmDeclarator.getIdentifierLoc(), 7741ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner diag::err_param_redefinition) 7756898e33d0b28346a4dbe9a666e0e4188fea80460Chris Lattner << ParmDeclarator.getIdentifier(); 7765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 77704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner FTI.ArgInfo[i].Param = Param; 7785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 7805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we don't have a comma, it is either the end of the list (a ';') or 7855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // an error, bail out. 786000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::comma)) 7875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 788a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Consume the comma. 7905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 791a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the next declarator. 7935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.clear(); 7945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 7955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 796a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 797000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 7985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 7995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 8005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_parse_error); 8015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip to end of block or statement 8025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi, true); 803000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 8045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 8055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 807a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 8085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The actions module must verify that all arguments were declared. 809a3a835149ed4b183e3b009a1f94a6123779d696bDouglas Gregor Actions.ActOnFinishKNRParamDeclarations(CurScope, D, Tok.getLocation()); 8105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseAsmStringLiteral - This is just a normal string-literal, but is not 8145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// allowed to be a wide string, and is not subject to character translation. 8155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 8165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-string-literal: 8175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal 8185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 819effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian RedlParser::OwningExprResult Parser::ParseAsmStringLiteral() { 8205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isTokenStringLiteral()) { 8215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_string_literal); 82261364dddc33383e62cfe3b841dbc0f471280d95bSebastian Redl return ExprError(); 8235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 824a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 82520df9b7ab9388b2a488c5b1293cd196b1e073b4eSebastian Redl OwningExprResult Res(ParseStringLiteralExpression()); 826effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl if (Res.isInvalid()) return move(Res); 827a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 8285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Diagnose: wide string literal in 'asm' 829a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 830effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return move(Res); 8315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseSimpleAsm 8345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 8355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] simple-asm-expr: 8365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 'asm' '(' asm-string-literal ')' 8375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 838ab197baec16bacade82325fb274cf6b992ac5d8aSebastian RedlParser::OwningExprResult Parser::ParseSimpleAsm(SourceLocation *EndLoc) { 839000732226610650837478cba97843d19b75f648eChris Lattner assert(Tok.is(tok::kw_asm) && "Not an asm!"); 840dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson SourceLocation Loc = ConsumeToken(); 841a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 842000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_paren)) { 8431ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(Tok, diag::err_expected_lparen_after) << "asm"; 84461364dddc33383e62cfe3b841dbc0f471280d95bSebastian Redl return ExprError(); 8455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 846a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 847ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl Loc = ConsumeParen(); 848a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 849effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl OwningExprResult Result(ParseAsmStringLiteral()); 850a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 851ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl if (Result.isInvalid()) { 852ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl SkipUntil(tok::r_paren, true, true); 853ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl if (EndLoc) 854ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl *EndLoc = Tok.getLocation(); 855ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl ConsumeAnyToken(); 856ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl } else { 857ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl Loc = MatchRHSPunctuation(tok::r_paren, Loc); 858ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl if (EndLoc) 859ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl *EndLoc = Loc; 860ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl } 861a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 862effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return move(Result); 8635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 865eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateTypeOrScopeToken - If the current token position is on a 866eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typename (possibly qualified in C++) or a C++ scope specifier not followed 867eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens 868eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// with a single annotation token representing the typename or C++ scope 869eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// respectively. 870eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// This simplifies handling of C++ scope specifiers and allows efficient 871eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// backtracking without the need to re-parse and resolve nested-names and 872eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typenames. 87344802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// It will mainly be called when we expect to treat identifiers as typenames 87444802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// (if they are typenames). For example, in C we do not expect identifiers 87544802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// inside expressions to be treated as typenames so it will not be called 87644802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// for expressions in C. 87744802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// The benefit for C/ObjC is that a typename will be annotated and 878b43a50ff1b0b171ece84425b0ad83a9a31f038faSteve Naroff/// Actions.getTypeName will not be needed to be called again (e.g. getTypeName 87944802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// will not be called twice, once to check whether we have a declaration 88044802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// specifier, and another one to get the actual type inside 88144802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// ParseDeclarationSpecifiers). 882a7bc7c880f86bc180684ef032d06df51bcae7a23Chris Lattner/// 883c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner/// This returns true if the token was annotated or an unrecoverable error 884c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner/// occurs. 88555a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// 88655a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// Note that this routine emits an error if you call it with ::new or ::delete 88755a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// as the current tokens, so only call it in contexts where these are invalid. 888495c35d291da48c4f5655bbb54d15128ddde0d4dDouglas Gregorbool Parser::TryAnnotateTypeOrScopeToken(bool EnteringContext) { 889d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) 890d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor || Tok.is(tok::kw_typename)) && 8917452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner "Cannot be a type or scope token!"); 8927452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner 893d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor if (Tok.is(tok::kw_typename)) { 894d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor // Parse a C++ typename-specifier, e.g., "typename T::type". 895d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor // 896d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor // typename-specifier: 897d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor // 'typename' '::' [opt] nested-name-specifier identifier 898d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor // 'typename' '::' [opt] nested-name-specifier template [opt] 8991734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor // simple-template-id 900d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor SourceLocation TypenameLoc = ConsumeToken(); 901d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor CXXScopeSpec SS; 9022dd078ae50ff7be1fb25ebeedde45e9ab691a4f0Douglas Gregor bool HadNestedNameSpecifier 9032dd078ae50ff7be1fb25ebeedde45e9ab691a4f0Douglas Gregor = ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false); 904d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor if (!HadNestedNameSpecifier) { 905d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename); 906d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor return false; 907d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor } 908d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor 909d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor TypeResult Ty; 910d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor if (Tok.is(tok::identifier)) { 911d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor // FIXME: check whether the next token is '<', first! 912d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor Ty = Actions.ActOnTypenameType(TypenameLoc, SS, *Tok.getIdentifierInfo(), 913d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor Tok.getLocation()); 9141734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor } else if (Tok.is(tok::annot_template_id)) { 9151734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor TemplateIdAnnotation *TemplateId 9161734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 9171734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor if (TemplateId->Kind == TNK_Function_template) { 9181734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor Diag(Tok, diag::err_typename_refers_to_non_type_template) 9191734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor << Tok.getAnnotationRange(); 9201734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor return false; 9211734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor } 922d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor 92331a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor AnnotateTemplateIdTokenAsType(0); 9241734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor assert(Tok.is(tok::annot_typename) && 9251734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor "AnnotateTemplateIdTokenAsType isn't working properly"); 92631a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor if (Tok.getAnnotationValue()) 92731a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor Ty = Actions.ActOnTypenameType(TypenameLoc, SS, SourceLocation(), 92831a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor Tok.getAnnotationValue()); 92931a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor else 93031a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor Ty = true; 9311734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor } else { 9321734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor Diag(Tok, diag::err_expected_type_name_after_typename) 9331734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor << SS.getRange(); 9341734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor return false; 9351734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor } 9361734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor 9371734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor Tok.setKind(tok::annot_typename); 93831a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor Tok.setAnnotationValue(Ty.isInvalid()? 0 : Ty.get()); 9391734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor Tok.setAnnotationEndLoc(Tok.getLocation()); 9401734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor Tok.setLocation(TypenameLoc); 9411734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor PP.AnnotateCachedTokens(Tok); 9421734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor return true; 943d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor } 944d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor 945eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis CXXScopeSpec SS; 9464bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis if (getLang().CPlusPlus) 9472dd078ae50ff7be1fb25ebeedde45e9ab691a4f0Douglas Gregor ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, EnteringContext); 948eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 949eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::identifier)) { 950608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // Determine whether the identifier is a type name. 951b43a50ff1b0b171ece84425b0ad83a9a31f038faSteve Naroff if (TypeTy *Ty = Actions.getTypeName(*Tok.getIdentifierInfo(), 952b696ea3a0693798daeafd896d77f0b8f1fec3cc5Douglas Gregor Tok.getLocation(), CurScope, &SS)) { 953608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // This is a typename. Replace the current token in-place with an 954608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // annotation type token. 955b31757b68afe06ba442a05775d08fe7aa0f6f889Chris Lattner Tok.setKind(tok::annot_typename); 956608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Tok.setAnnotationValue(Ty); 957608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Tok.setAnnotationEndLoc(Tok.getLocation()); 958608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner if (SS.isNotEmpty()) // it was a C++ qualified type name. 959608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Tok.setLocation(SS.getBeginLoc()); 960608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner 961608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // In case the tokens were cached, have Preprocessor replace 962608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // them with the annotation token. 963608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner PP.AnnotateCachedTokens(Tok); 964608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner return true; 96539a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor } 96639a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor 96739a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor if (!getLang().CPlusPlus) { 968608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // If we're in C, we can't have :: tokens at all (the lexer won't return 969608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // them). If the identifier is not a type, then it can't be scope either, 970608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // just early exit. 971608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner return false; 972eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 973608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner 97439a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // If this is a template-id, annotate with a template-id or type token. 97555f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor if (NextToken().is(tok::less)) { 9767532dc66648cfe7432c9fe66dec5225f0ab301c6Douglas Gregor TemplateTy Template; 97755f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor if (TemplateNameKind TNK 9782dd078ae50ff7be1fb25ebeedde45e9ab691a4f0Douglas Gregor = Actions.isTemplateName(CurScope, *Tok.getIdentifierInfo(), 9792dd078ae50ff7be1fb25ebeedde45e9ab691a4f0Douglas Gregor Tok.getLocation(), &SS, 9802dd078ae50ff7be1fb25ebeedde45e9ab691a4f0Douglas Gregor /*ObjectType=*/0, EnteringContext, 9812dd078ae50ff7be1fb25ebeedde45e9ab691a4f0Douglas Gregor Template)) 982c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner if (AnnotateTemplateIdToken(Template, TNK, &SS)) { 983c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner // If an unrecoverable error occurred, we need to return true here, 984c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner // because the token stream is in a damaged state. We may not return 985c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner // a valid identifier. 986c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner return Tok.isNot(tok::identifier); 987c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner } 98855f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor } 989d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor 99039a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // The current token, which is either an identifier or a 99139a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // template-id, is not part of the annotation. Fall through to 99239a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // push that token back into the stream and complete the C++ scope 99339a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // specifier annotation. 994d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor } 995eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 99639a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor if (Tok.is(tok::annot_template_id)) { 99739a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor TemplateIdAnnotation *TemplateId 99839a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 999c45c232440dfafedca1a3773b904fb42609b1b19Douglas Gregor if (TemplateId->Kind == TNK_Type_template) { 100039a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // A template-id that refers to a type was parsed into a 100139a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // template-id annotation in a context where we weren't allowed 100239a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // to produce a type annotation token. Update the template-id 100339a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // annotation token to a type annotation token now. 100431a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor AnnotateTemplateIdTokenAsType(&SS); 100531a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor return true; 100639a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor } 100739a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor } 1008d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor 10096ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner if (SS.isEmpty()) 10103c9028a5e8dfb120c0d917849a1f79c091a98b88Eli Friedman return Tok.isNot(tok::identifier) && Tok.isNot(tok::coloncolon); 10116ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner 10126ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // A C++ scope specifier that isn't followed by a typename. 10136ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // Push the current token back into the token stream (or revert it if it is 10146ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // cached) and use an annotation scope token for current token. 10156ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner if (PP.isBacktrackEnabled()) 10166ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.RevertCachedTokens(1); 10176ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner else 10186ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.EnterToken(Tok); 10196ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setKind(tok::annot_cxxscope); 10203507369940bfb269551bfa1fec812481f60e3552Douglas Gregor Tok.setAnnotationValue(SS.getScopeRep()); 10216ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setAnnotationRange(SS.getRange()); 10226ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner 10236ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // In case the tokens were cached, have Preprocessor replace them with the 10246ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // annotation token. 10256ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.AnnotateCachedTokens(Tok); 1026a7bc7c880f86bc180684ef032d06df51bcae7a23Chris Lattner return true; 1027eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 1028eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 1029eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only 103039a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor/// annotates C++ scope specifiers and template-ids. This returns 1031c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner/// true if the token was annotated or there was an error that could not be 1032c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner/// recovered from. 103355a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// 103455a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// Note that this routine emits an error if you call it with ::new or ::delete 103555a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// as the current tokens, so only call it in contexts where these are invalid. 1036495c35d291da48c4f5655bbb54d15128ddde0d4dDouglas Gregorbool Parser::TryAnnotateCXXScopeToken(bool EnteringContext) { 10374bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis assert(getLang().CPlusPlus && 10386ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner "Call sites of this function should be guarded by checking for C++"); 10397452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && 10407452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner "Cannot be a type or scope token!"); 1041eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 10424bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis CXXScopeSpec SS; 10432dd078ae50ff7be1fb25ebeedde45e9ab691a4f0Douglas Gregor if (!ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, EnteringContext)) 104439a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor return Tok.is(tok::annot_template_id); 1045eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 10466ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // Push the current token back into the token stream (or revert it if it is 10476ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // cached) and use an annotation scope token for current token. 10486ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner if (PP.isBacktrackEnabled()) 10496ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.RevertCachedTokens(1); 10506ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner else 10516ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.EnterToken(Tok); 10526ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setKind(tok::annot_cxxscope); 10533507369940bfb269551bfa1fec812481f60e3552Douglas Gregor Tok.setAnnotationValue(SS.getScopeRep()); 10546ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setAnnotationRange(SS.getRange()); 10556ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner 10566ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // In case the tokens were cached, have Preprocessor replace them with the 10576ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // annotation token. 10586ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.AnnotateCachedTokens(Tok); 10595e02c47a7085831586344a9728763cb50540c7f7Chris Lattner return true; 1060eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 1061