Parser.cpp revision ca1bdd7c269a2390d43c040a60511edd017ee130
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; 271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 282e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregorpublic: 292e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor explicit ActionCommentHandler(Action &Actions) : Actions(Actions) { } 301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 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) 371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump : 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()); 501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 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()); 591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 602e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor CommentHandler.reset(new ActionCommentHandler(actions)); 611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 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 } 721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 73ddcbc0a72a04a5ae2493088f1437200a9ea480b1Chris Lattner if (Tok.getLocation().isInvalid()) { 74ddcbc0a72a04a5ae2493088f1437200a9ea480b1Chris Lattner OS << "<unknown> parser at unknown location\n"; 75ddcbc0a72a04a5ae2493088f1437200a9ea480b1Chris Lattner return; 76ddcbc0a72a04a5ae2493088f1437200a9ea480b1Chris Lattner } 771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 780102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner const Preprocessor &PP = P.getPreprocessor(); 790102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner Tok.getLocation().print(OS, PP.getSourceManager()); 809fa31dd71e0414e2ca905380e2f8d42710b22c82Daniel Dunbar if (Tok.isAnnotation()) 819fa31dd71e0414e2ca905380e2f8d42710b22c82Daniel Dunbar OS << ": at annotation token \n"; 829fa31dd71e0414e2ca905380e2f8d42710b22c82Daniel Dunbar else 839fa31dd71e0414e2ca905380e2f8d42710b22c82Daniel Dunbar OS << ": current parser token '" << PP.getSpelling(Tok) << "'\n"; 84f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor} 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 860102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner 873cbfe2c4159e0a219ae660d50625c013aa4afbd0Chris LattnerDiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) { 880102c30896c83f70cf6b6519fd5c674cb981c0b5Chris Lattner return Diags.Report(FullSourceLoc(Loc, PP.getSourceManager()), DiagID); 891ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner} 901ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner 913cbfe2c4159e0a219ae660d50625c013aa4afbd0Chris LattnerDiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) { 921ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner return Diag(Tok.getLocation(), DiagID); 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 954b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// \brief Emits a diagnostic suggesting parentheses surrounding a 964b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// given range. 974b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// 984b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// \param Loc The location where we'll emit the diagnostic. 994b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// \param Loc The kind of diagnostic to emit. 1004b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor/// \param ParenRange Source range enclosing code that should be parenthesized. 1014b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregorvoid Parser::SuggestParentheses(SourceLocation Loc, unsigned DK, 1024b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor SourceRange ParenRange) { 103b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor SourceLocation EndLoc = PP.getLocForEndOfToken(ParenRange.getEnd()); 104b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor if (!ParenRange.getEnd().isFileID() || EndLoc.isInvalid()) { 1054b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor // We can't display the parentheses, so just dig the 1064b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor // warning/error and return. 1074b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor Diag(Loc, DK); 1084b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor return; 1094b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor } 1101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(Loc, DK) 112b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor << CodeModificationHint::CreateInsertion(ParenRange.getBegin(), "(") 113b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor << CodeModificationHint::CreateInsertion(EndLoc, ")"); 1144b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor} 1154b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// MatchRHSPunctuation - For punctuation with a LHS and RHS (e.g. '['/']'), 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// this helper function matches and consumes the specified RHS token if 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// present. If not present, it emits the specified diagnostic indicating 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that the parser failed to match the RHS of the token at LHSLoc. LHSName 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// should be the name of the unmatched LHS token. 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerSourceLocation Parser::MatchRHSPunctuation(tok::TokenKind RHSTok, 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation LHSLoc) { 123a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 124000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(RHSTok)) 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ConsumeAnyToken(); 126a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation R = Tok.getLocation(); 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *LHSName = "unknown"; 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::kind DID = diag::err_parse_error; 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (RHSTok) { 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: break; 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break; 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break; 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break; 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::greater: LHSName = "<"; DID = diag::err_expected_greater; break; 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, DID); 13828eb7e992b9a266abb300da25b6d3c1557cec361Chris Lattner Diag(LHSLoc, diag::note_matching) << LHSName; 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(RHSTok); 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return R; 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// input. If so, it is consumed and false is returned. 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If the input is malformed, this emits the specified diagnostic. Next, if 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// returned. 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID, 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *Msg, tok::TokenKind SkipToTok) { 151000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(ExpectedTok)) { 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 155a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 1564b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor const char *Spelling = 0; 157b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation); 1581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (EndLoc.isValid() && 159b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor (Spelling = tok::getTokenSimpleSpelling(ExpectedTok))) { 1604b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor // Show what code to insert to fix this problem. 1611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Diag(EndLoc, DiagID) 1624b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor << Msg 163b2fb6de9070fea9abc56c8e8d5469066e964cefeDouglas Gregor << CodeModificationHint::CreateInsertion(EndLoc, Spelling); 1644b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor } else 1654b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor Diag(Tok, DiagID) << Msg; 1664b2d3f7bcc4df31157df443af1b80bcaa9b58bbaDouglas Gregor 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (SkipToTok != tok::unknown) 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(SkipToTok); 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Error recovery. 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// SkipUntil - Read tokens until we get to the specified token, then consume 177012cf464254804279efa84e21b4b493dde76c5f1Chris Lattner/// it (unless DontConsume is true). Because we cannot guarantee that the 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// token will ever occur, this skips to the next token, or to some likely 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// good stopping point. If StopAtSemi is true, skipping will stop at a ';' 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character. 181a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// If SkipUntil finds the specified token, it returns true, otherwise it 183a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// returns false. 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Parser::SkipUntil(const tok::TokenKind *Toks, unsigned NumToks, 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool StopAtSemi, bool DontConsume) { 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We always want this function to skip at least one token if the first token 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // isn't T and if not at EOF. 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isFirstTokenSkipped = true; 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we found one of the tokens, stop and return true. 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; i != NumToks; ++i) { 192000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(Toks[i])) { 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DontConsume) { 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Noop, don't consume the token. 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeAnyToken(); 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 201a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::eof: 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ran out of tokens. 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 206a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_paren: 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested parens. 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_paren, false); 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_square: 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested square brackets. 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_square, false); 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::l_brace: 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Recursively skip properly-nested braces. 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::r_brace, false); 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 222a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Okay, we found a ']' or '}' or ')', which we think should be balanced. 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Since the user wasn't looking for this token (if they were, it would 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // already be handled), this isn't balanced. If there is a LHS token at a 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // higher level, we will assume that this matches the unbalanced token 2275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and return it. Otherwise, this is a spurious RHS token, which we skip. 2285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_paren: 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ParenCount && !isFirstTokenSkipped) 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeParen(); 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_square: 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BracketCount && !isFirstTokenSkipped) 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBracket(); 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::r_brace: 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (BraceCount && !isFirstTokenSkipped) 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; // Matches something. 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeBrace(); 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 243a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::string_literal: 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::wide_string_literal: 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeStringToken(); 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StopAtSemi) 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip this token. 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isFirstTokenSkipped = false; 258a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump } 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Scope manipulation 2635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// EnterScope - Start a new scope. 2665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::EnterScope(unsigned ScopeFlags) { 2679e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes) { 2689e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *N = ScopeCache[--NumCachedScopes]; 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer N->Init(CurScope, ScopeFlags); 2705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = N; 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurScope = new Scope(CurScope, ScopeFlags); 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ExitScope - Pop a scope off the scope stack. 2775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ExitScope() { 2785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope && "Scope imbalance!"); 2795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 28090ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // Inform the actions module that this scope is going away if there are any 28190ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner // decls in it. 28290ae68aae98f12fe1950c63e2f6bd0fabce6cb1eChris Lattner if (!CurScope->decl_empty()) 283b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnPopScope(Tok.getLocation(), CurScope); 284a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2859e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner Scope *OldScope = CurScope; 2869e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner CurScope = OldScope->getParent(); 287a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 2889e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner if (NumCachedScopes == ScopeCacheSize) 2899e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete OldScope; 2905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 2919e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner ScopeCache[NumCachedScopes++] = OldScope; 2925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// C99 6.9: External Definitions. 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerParser::~Parser() { 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we still have scopes active, delete the scope tree. 3035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete CurScope; 304a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 3055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Free the scope cache. 3069e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner for (unsigned i = 0, e = NumCachedScopes; i != e; ++i) 3079e344c65b1e8b83e1d3ada507cf653526ff2c005Chris Lattner delete ScopeCache[i]; 308fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar 309fcdd8fe26de3eee44927600bf1853e21bd90dd84Daniel Dunbar // Remove the pragma handlers we installed. 3104726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek PP.RemovePragmaHandler(0, PackHandler.get()); 3114726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek PackHandler.reset(); 3124726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek PP.RemovePragmaHandler(0, UnusedHandler.get()); 3134726d03ab3abce41911c31d1354a18f1258cae4dTed Kremenek UnusedHandler.reset(); 3149991479ad5dde617168cc1e4b18425cdbbfd9fa9Eli Friedman PP.RemovePragmaHandler(0, WeakHandler.get()); 3159991479ad5dde617168cc1e4b18425cdbbfd9fa9Eli Friedman WeakHandler.reset(); 3162e22253e03e175144aeb9d13350a12fd83f858beDouglas Gregor PP.RemoveCommentHandler(CommentHandler.get()); 3175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Initialize - Warm up the parser. 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::Initialize() { 3225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Prime the lexer look-ahead. 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 324a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 32531e057270232c1c37602579cb6461c2704175672Chris Lattner // Create the translation unit scope. Install it as the current scope. 3265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(CurScope == 0 && "A scope is already active?"); 32731e057270232c1c37602579cb6461c2704175672Chris Lattner EnterScope(Scope::DeclScope); 328b216c8861c60af9c56c900a485233255c4452df2Steve Naroff Actions.ActOnTranslationUnitScope(Tok.getLocation(), CurScope); 329a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 330000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::eof) && 331f72617544287acf0281c3b1a733bcb22a02e6ca4Chris Lattner !getLang().CPlusPlus) // Empty source file is an extension in C 3325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::ext_empty_source_file); 333a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 33434870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner // Initialization for Objective-C context sensitive keywords recognition. 335a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek // Referenced in Parser::ParseObjCTypeQualifierList. 33634870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner if (getLang().ObjC1) { 337a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in"); 338a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out"); 339a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout"); 340a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway"); 341a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy"); 342a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref"); 34334870da70fa42b0391b79627ebd0cfc6eb22213bChris Lattner } 344662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar 345662e8b5647adbb1bc9eeceece7b64600cfa87471Daniel Dunbar Ident_super = &PP.getIdentifierTable().get("super"); 3465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTopLevelDecl - Parse one top-level declaration, return whatever the 3495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// action tells us to. This returns true if the EOF was encountered. 350682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattnerbool Parser::ParseTopLevelDecl(DeclGroupPtrTy &Result) { 351682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner Result = DeclGroupPtrTy(); 3529299f3fa85796613cc787a2062c9562d07c8613eChris Lattner if (Tok.is(tok::eof)) { 3539299f3fa85796613cc787a2062c9562d07c8613eChris Lattner Actions.ActOnEndOfTranslationUnit(); 3549299f3fa85796613cc787a2062c9562d07c8613eChris Lattner return true; 3559299f3fa85796613cc787a2062c9562d07c8613eChris Lattner } 356a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 35789307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff Result = ParseExternalDeclaration(); 3585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 3595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseTranslationUnit: 3625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// translation-unit: [C99 6.9] 363a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// external-declaration 364a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// translation-unit external-declaration 3655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseTranslationUnit() { 3668935b8b49053122ddd3ab4cd59af0fe5eb9c23cfDouglas Gregor Initialize(); 367a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 368682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DeclGroupPtrTy Res; 36989307ffaf8acf4d6fdffd72b607ca4fbcfdffc9dSteve Naroff while (!ParseTopLevelDecl(Res)) 3705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /*parse them all*/; 3711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 37206f548596beef4c0a227a45cba996497f99566c0Chris Lattner ExitScope(); 37306f548596beef4c0a227a45cba996497f99566c0Chris Lattner assert(CurScope == 0 && "Scope imbalance!"); 3745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseExternalDeclaration: 37790b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner/// 378c19923dda3d28f67aab4726cd40bb07032758383Douglas Gregor/// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl] 379c3018153a11afe91849748a93d920040a571b76cChris Lattner/// function-definition 380c3018153a11afe91849748a93d920040a571b76cChris Lattner/// declaration 381a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor/// [C++0x] empty-declaration 3825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition 383c3018153a11afe91849748a93d920040a571b76cChris Lattner/// [GNU] __extension__ external-declaration 3845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-definition 3855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-class-declaration 3865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-alias-declaration 3875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-protocol-definition 3885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] objc-method-definition 3895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OBJC] @end 390c19923dda3d28f67aab4726cd40bb07032758383Douglas Gregor/// [C++] linkage-specification 3915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-definition: 3925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// simple-asm-expr ';' 3935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 394a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor/// [C++0x] empty-declaration: 395a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor/// ';' 396a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor/// 39745f965581935791a018df829a14dff53c1dd8f47Douglas Gregor/// [C++0x/GNU] 'extern' 'template' declaration 398682bf92db408a6cbc3d37b5496a99b6ef85041ecChris LattnerParser::DeclGroupPtrTy Parser::ParseExternalDeclaration() { 399682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DeclPtrTy SingleDecl; 4005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Tok.getKind()) { 4015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::semi: 402a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor if (!getLang().CPlusPlus0x) 403a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor Diag(Tok, diag::ext_top_level_semi) 404a1d71aea847a50b3acbd187d2ae9e5c1ead0f4e2Douglas Gregor << CodeModificationHint::CreateRemoval(SourceRange(Tok.getLocation())); 4051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 4075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Invoke action for top-level semicolon. 408682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 40990b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner case tok::r_brace: 41090b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner Diag(Tok, diag::err_expected_external_declaration); 41190b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner ConsumeBrace(); 412682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 41390b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner case tok::eof: 41490b93d6f6961edd8f17e089253d655892adc1ef7Chris Lattner Diag(Tok, diag::err_expected_external_declaration); 415682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 416c3018153a11afe91849748a93d920040a571b76cChris Lattner case tok::kw___extension__: { 417c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner // __extension__ silences extension warnings in the subexpression. 418c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner ExtensionRAIIObject O(Diags); // Use RAII to do this. 41939146d6497ad5e7ca8ef639221e7b3e15d07c888Chris Lattner ConsumeToken(); 420c46d1a1f8af67a87689d7db9eaf96027282ccaeaChris Lattner return ParseExternalDeclaration(); 421c3018153a11afe91849748a93d920040a571b76cChris Lattner } 422dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson case tok::kw_asm: { 423effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl OwningExprResult Result(ParseSimpleAsm()); 424a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 4253f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 4263f9424f3206b834b5dd0e7c403348651ab6fafbbAnders Carlsson "top-level asm block"); 427dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson 428682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner if (Result.isInvalid()) 429682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 430682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner SingleDecl = Actions.ActOnFileScopeAsmDecl(Tok.getLocation(), move(Result)); 431682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner break; 432dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson } 4335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::at: 434682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // @ is not a legal token unless objc is enabled, no need to check for ObjC. 435682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner /// FIXME: ParseObjCAtDirectives should return a DeclGroup for things like 436682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner /// @class foo, bar; 437682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner SingleDecl = ParseObjCAtDirectives(); 438682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner break; 4395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::minus: 4405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::plus: 441682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner if (!getLang().ObjC1) { 442682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner Diag(Tok, diag::err_expected_external_declaration); 443682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner ConsumeToken(); 444682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 445682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner } 446682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner SingleDecl = ParseObjCMethodDefinition(); 447682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner break; 448791215b7a24666912c0b71175d2ca5ba082f666eDouglas Gregor case tok::code_completion: 449791215b7a24666912c0b71175d2ca5ba082f666eDouglas Gregor Actions.CodeCompleteOrdinaryName(CurScope); 450791215b7a24666912c0b71175d2ca5ba082f666eDouglas Gregor ConsumeToken(); 451791215b7a24666912c0b71175d2ca5ba082f666eDouglas Gregor return ParseExternalDeclaration(); 452f780abc21c39cd4731b9e38f2d2d9f7d1510bd7bDouglas Gregor case tok::kw_using: 4538f08cb7d0b97786b17ef05e05caa55aad4d6bd39Chris Lattner case tok::kw_namespace: 4545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case tok::kw_typedef: 455adcac8824a9cff13f1ef61a69e38c1041cba12eeDouglas Gregor case tok::kw_template: 456adcac8824a9cff13f1ef61a69e38c1041cba12eeDouglas Gregor case tok::kw_export: // As in 'export template' 457511d7aba3b12853fdb88729a0313b80a60eab8adAnders Carlsson case tok::kw_static_assert: 458bae35118fc5cea2da08567dbb9763af7f906dae2Chris Lattner // A function definition cannot start with a these keywords. 45997144fc41a9419bf6d74fc9450e8ef3f6e11f7e0Chris Lattner { 46097144fc41a9419bf6d74fc9450e8ef3f6e11f7e0Chris Lattner SourceLocation DeclEnd; 46197144fc41a9419bf6d74fc9450e8ef3f6e11f7e0Chris Lattner return ParseDeclaration(Declarator::FileContext, DeclEnd); 46297144fc41a9419bf6d74fc9450e8ef3f6e11f7e0Chris Lattner } 46345f965581935791a018df829a14dff53c1dd8f47Douglas Gregor case tok::kw_extern: 46445f965581935791a018df829a14dff53c1dd8f47Douglas Gregor if (getLang().CPlusPlus && NextToken().is(tok::kw_template)) { 46545f965581935791a018df829a14dff53c1dd8f47Douglas Gregor // Extern templates 46645f965581935791a018df829a14dff53c1dd8f47Douglas Gregor SourceLocation ExternLoc = ConsumeToken(); 46745f965581935791a018df829a14dff53c1dd8f47Douglas Gregor SourceLocation TemplateLoc = ConsumeToken(); 46845f965581935791a018df829a14dff53c1dd8f47Douglas Gregor SourceLocation DeclEnd; 46945f965581935791a018df829a14dff53c1dd8f47Douglas Gregor return Actions.ConvertDeclToDeclGroup( 47045f965581935791a018df829a14dff53c1dd8f47Douglas Gregor ParseExplicitInstantiation(ExternLoc, TemplateLoc, DeclEnd)); 47145f965581935791a018df829a14dff53c1dd8f47Douglas Gregor } 4721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 47345f965581935791a018df829a14dff53c1dd8f47Douglas Gregor // FIXME: Detect C++ linkage specifications here? 4741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 47545f965581935791a018df829a14dff53c1dd8f47Douglas Gregor // Fall through to handle other declarations or function definitions. 4761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 4785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We can't tell whether this is a function-definition or declaration yet. 4795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ParseDeclarationOrFunctionDefinition(); 4805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 482682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // This routine returns a DeclGroup, if the thing we parsed only contains a 483682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner // single decl, convert it now. 484682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return Actions.ConvertDeclToDeclGroup(SingleDecl); 4855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4871426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor/// \brief Determine whether the current token, if it occurs after a 4881426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor/// declarator, continues a declaration or declaration list. 4891426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregorbool Parser::isDeclarationAfterDeclarator() { 4901426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor return Tok.is(tok::equal) || // int X()= -> not a function def 4911426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor Tok.is(tok::comma) || // int X(), -> not a function def 4921426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor Tok.is(tok::semi) || // int X(); -> not a function def 4931426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def 4941426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def 4951426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor (getLang().CPlusPlus && 4961426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor Tok.is(tok::l_paren)); // int X(0) -> not a function def [C++] 4971426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor} 4981426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor 4991426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor/// \brief Determine whether the current token, if it occurs after a 5001426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor/// declarator, indicates the start of a function definition. 5011426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregorbool Parser::isStartOfFunctionDefinition() { 5021426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor return Tok.is(tok::l_brace) || // int X() {} 5031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (!getLang().CPlusPlus && 5041426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor isDeclarationSpecifier()) || // int X(f) int f; {} 5051426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor (getLang().CPlusPlus && 5061426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor (Tok.is(tok::colon) || // X() : Base() {} (used for ctors) 5071426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor Tok.is(tok::kw_try))); // X() try { ... } 5081426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor} 5091426e534b4fca6a05b1120d634aae46be79ca17cDouglas Gregor 5105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or 5115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a declaration. We can't tell which we have until we read up to the 512c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor/// compound-statement in function-definition. TemplateParams, if 513c4b4e7b8f6ca9b036824e048af49cd2a52b57cdfDouglas Gregor/// non-NULL, provides the template parameters when we're parsing a 5141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// C++ template-declaration. 5155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 5165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// function-definition: [C99 6.9.1] 517a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 518a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 519a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 520a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// 5215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// declaration: [C99 6.7] 522697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// declaration-specifiers init-declarator-list[opt] ';' 523697e15f2a028f8997cccb24ecd05099988cfb1a9Chris Lattner/// [!C99] init-declarator-list ';' [TODO: warn in c99 mode] 5245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [OMP] threadprivate-directive [TODO] 5255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 526682bf92db408a6cbc3d37b5496a99b6ef85041ecChris LattnerParser::DeclGroupPtrTy 527709131972f67190edd310ef72bd5e8c9a7764823Douglas GregorParser::ParseDeclarationOrFunctionDefinition(AccessSpecifier AS) { 5285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 5295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 5304d9a16f36d3b768672d50e6d02000f982ae448d7Douglas Gregor ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS); 531a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 5325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" 5335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // declaration-specifiers init-declarator-list[opt] ';' 534000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 5355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 536682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DeclPtrTy TheDecl = Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 537682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return Actions.ConvertDeclToDeclGroup(TheDecl); 5385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 539a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 540246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // ObjC2 allows prefix attributes on class interfaces and protocols. 541246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // FIXME: This still needs better diagnostics. We should only accept 542246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar // attributes here, no types, etc. 543000732226610650837478cba97843d19b75f648eChris Lattner if (getLang().ObjC2 && Tok.is(tok::at)) { 544dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff SourceLocation AtLoc = ConsumeToken(); // the "@" 5451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!Tok.isObjCAtKeyword(tok::objc_interface) && 546246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar !Tok.isObjCAtKeyword(tok::objc_protocol)) { 547246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar Diag(Tok, diag::err_objc_unexpected_attr); 548cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner SkipUntil(tok::semi); // FIXME: better skip? 549682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return DeclGroupPtrTy(); 550cb53b361bce341c8591333c6997f62e480acc0b4Chris Lattner } 551d8ac05753dc4506224d445ff98399c01da3136e5John McCall 5520de2ae28c603322f05e2d9200c7d457c8b928983Fariborz Jahanian const char *PrevSpec = 0; 553fec54013fcd0eb72642741584ca04c1bc292bef8John McCall unsigned DiagID; 554fec54013fcd0eb72642741584ca04c1bc292bef8John McCall if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec, DiagID)) 555fec54013fcd0eb72642741584ca04c1bc292bef8John McCall Diag(AtLoc, DiagID) << PrevSpec; 5561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 557682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DeclPtrTy TheDecl; 558246e70f69cb8aeb67225c54690f1c6b25abd5a86Daniel Dunbar if (Tok.isObjCAtKeyword(tok::objc_protocol)) 559682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner TheDecl = ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes()); 560682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner else 561682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner TheDecl = ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()); 562682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return Actions.ConvertDeclToDeclGroup(TheDecl); 563dac269b65eed82182fc3e96566dedd6562dfe11eSteve Naroff } 564a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 565c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // If the declspec consisted only of 'extern' and we have a string 566c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // literal following it, this must be a C++ linkage specifier like 567c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner // 'extern "C"'. 5683c6f6a7a1bb9969112617a26d2333bab2f6efd65Chris Lattner if (Tok.is(tok::string_literal) && getLang().CPlusPlus && 569c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner DS.getStorageClassSpec() == DeclSpec::SCS_extern && 570682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) { 571682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner DeclPtrTy TheDecl = ParseLinkage(Declarator::FileContext); 572682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner return Actions.ConvertDeclToDeclGroup(TheDecl); 573682bf92db408a6cbc3d37b5496a99b6ef85041ecChris Lattner } 574c6fdc34ac0183bfa03d65f317c78b7bdac52897eChris Lattner 575d8ac05753dc4506224d445ff98399c01da3136e5John McCall return ParseDeclGroup(DS, Declarator::FileContext, true); 5765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseFunctionDefinition - We parsed and verified that the specified 5795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// Declarator is well formed. If this is a K&R-style function, read the 5805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// parameters declaration-list, then start the compound-statement. 5815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 582a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// function-definition: [C99 6.9.1] 583a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// decl-specs declarator declaration-list[opt] compound-statement 584a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner/// [C90] function-definition: [C99 6.7.1] - implicit int result 585a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump/// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement 5867ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 58723c4b1883b13dc17484b7214091b73f3ba29096eChris Lattner/// decl-specifier-seq[opt] declarator ctor-initializer[opt] 58823c4b1883b13dc17484b7214091b73f3ba29096eChris Lattner/// function-body 5897ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor/// [C++] function-definition: [C++ 8.4] 590d3a413d3b8eb39bcee5944bc545d9997c1abe492Sebastian Redl/// decl-specifier-seq[opt] declarator function-try-block 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 59252591bf224b2c43e2b00e265bb8599a620081925Douglas GregorParser::DeclPtrTy Parser::ParseFunctionDefinition(Declarator &D, 59352591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor const ParsedTemplateInfo &TemplateInfo) { 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0); 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(FnTypeInfo.Kind == DeclaratorChunk::Function && 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "This isn't a function declarator!"); 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun; 598a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 599a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // If this is C90 and the declspecs were completely missing, fudge in an 600a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // implicit int. We do this here because this is the only place where 601a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner // declaration-specifiers are completely optional in the grammar. 6022a327d11a07dfbdf20910cebbae38910eda111fdChris Lattner if (getLang().ImplicitInt && D.getDeclSpec().isEmpty()) { 603a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner const char *PrevSpec; 604fec54013fcd0eb72642741584ca04c1bc292bef8John McCall unsigned DiagID; 60531c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int, 60631c286803c60c59d314525e047d0e72f9a1cb55bChris Lattner D.getIdentifierLoc(), 607fec54013fcd0eb72642741584ca04c1bc292bef8John McCall PrevSpec, DiagID); 608ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl D.SetRangeBegin(D.getDeclSpec().getSourceRange().getBegin()); 609a798ebc82627ea9cb7a00da07d2b60f9f2114f69Chris Lattner } 610a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this declaration was formed with a K&R-style identifier list for the 6125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // arguments, parse declarations for all of the args next. 6135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // int foo(a,b) int a; float b; {} 6145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!FTI.hasPrototype && FTI.NumArgs != 0) 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseKNRParamDeclarations(D); 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6177ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // We should have either an opening brace or, in a C++ constructor, 6187ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // we may have a colon. 619d3a413d3b8eb39bcee5944bc545d9997c1abe492Sebastian Redl if (Tok.isNot(tok::l_brace) && Tok.isNot(tok::colon) && 620d3a413d3b8eb39bcee5944bc545d9997c1abe492Sebastian Redl Tok.isNot(tok::kw_try)) { 6215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_fn_body); 6225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over garbage, until we get to '{'. Don't eat the '{'. 6245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::l_brace, true, true); 625a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we didn't find the '{', bail out. 627000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_brace)) 628b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner return DeclPtrTy(); 6295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 630a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 631b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Enter a scope for the function body. 6328935b8b49053122ddd3ab4cd59af0fe5eb9c23cfDouglas Gregor ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope); 633a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 634b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // Tell the actions module that we have entered a function definition with the 635b652cea7d7b70ebe3744fb6d72c9ad9cf3c95429Chris Lattner // specified Declarator for the function. 6361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump DeclPtrTy Res = TemplateInfo.TemplateParams? 63752591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor Actions.ActOnStartOfFunctionTemplateDef(CurScope, 63852591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor Action::MultiTemplateParamsArg(Actions, 63952591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor TemplateInfo.TemplateParams->data(), 64052591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor TemplateInfo.TemplateParams->size()), 64152591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor D) 64252591bf224b2c43e2b00e265bb8599a620081925Douglas Gregor : Actions.ActOnStartOfFunctionDef(CurScope, D); 643a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 644d3a413d3b8eb39bcee5944bc545d9997c1abe492Sebastian Redl if (Tok.is(tok::kw_try)) 645d3a413d3b8eb39bcee5944bc545d9997c1abe492Sebastian Redl return ParseFunctionTryBlock(Res); 646d3a413d3b8eb39bcee5944bc545d9997c1abe492Sebastian Redl 6477ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // If we have a colon, then we're probably parsing a C++ 6487ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor // ctor-initializer. 6497ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor if (Tok.is(tok::colon)) 6507ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor ParseConstructorInitializer(Res); 6510849d38128536b0b33377d91bf02d005308319efFariborz Jahanian else 652393612e6c7727f1fee50039254d9f434364cc0b2Fariborz Jahanian Actions.ActOnDefaultCtorInitializers(Res); 6537ad8390f7992ab7f19b1460c5f0b9d96f165c4e9Douglas Gregor 65440e9bc84a2ab49fc33c2b1a95c6674ab2b820e9eChris Lattner return ParseFunctionStatementBody(Res); 6555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides 6585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// types for a function with a K&R-style identifier list for arguments. 6595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid Parser::ParseKNRParamDeclarations(Declarator &D) { 6605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that the top-level of this declarator is a function. 6615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 66304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // Enter function-declaration scope, limiting any declarators to the 66404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // function prototype scope, including parameter declarators. 6653218c4bb3b5d7250f12420de6db7ef3e3f805a75Douglas Gregor ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope|Scope::DeclScope); 66604421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 6675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Read all the argument declarations. 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (isDeclarationSpecifier()) { 6695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation DSStart = Tok.getLocation(); 670a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the common declaration-specifiers piece. 6725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DeclSpec DS; 6735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarationSpecifiers(DS); 674a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: 'each declaration in the declaration list shall have at 6765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // least one declarator'. 6775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // NOTE: GCC just makes this an ext-warn. It's not clear what it does with 6785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the declarations though. It's trivial to ignore them, really hard to do 6795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // anything else with them. 680000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 6815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DSStart, diag::err_declaration_does_not_declare_param); 6825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 685a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other 6875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // than register. 6885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && 6895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.getStorageClassSpec() != DeclSpec::SCS_register) { 6905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getStorageClassSpecLoc(), 6915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 6925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 6935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (DS.isThreadSpecified()) { 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(DS.getThreadSpecLoc(), 6965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer diag::err_invalid_storage_class_in_func_decl); 6975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DS.ClearStorageClassSpecs(); 6985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 699a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the first declarator attached to this declspec. 7015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext); 7025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 7035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Handle the full declarator list. 7055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (1) { 706b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner Action::AttrTy *AttrList; 7075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If attributes are present, parse them. 708000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::kw___attribute)) 7095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: attach attributes too. 7105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer AttrList = ParseAttributes(); 711a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Ask the actions module to compute the type for this declarator. 713b28317a8e5e0e2953d1e5406d753d6c3c7f1e7d2Chris Lattner Action::DeclPtrTy Param = 71404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner Actions.ActOnParamDeclarator(CurScope, ParmDeclarator); 7152bd42fadafddc8acf744b57a970bdc96a077c617Steve Naroff 716a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump if (Param && 7175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // A missing identifier has already been diagnosed. 7185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.getIdentifier()) { 7195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan the argument list looking for the correct param to apply this 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // type. 7225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; ; ++i) { 7235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.9.1p6: those declarators shall declare only identifiers from 7245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the identifier list. 7255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (i == FTI.NumArgs) { 7261ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param) 7276898e33d0b28346a4dbe9a666e0e4188fea80460Chris Lattner << ParmDeclarator.getIdentifier(); 7285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 7295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 730a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) { 7325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reject redefinitions of parameters. 73304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner if (FTI.ArgInfo[i].Param) { 7345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(ParmDeclarator.getIdentifierLoc(), 7351ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner diag::err_param_redefinition) 7366898e33d0b28346a4dbe9a666e0e4188fea80460Chris Lattner << ParmDeclarator.getIdentifier(); 7375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 73804421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner FTI.ArgInfo[i].Param = Param; 7395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 7415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we don't have a comma, it is either the end of the list (a ';') or 7465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // an error, bail out. 747000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::comma)) 7485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 749a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Consume the comma. 7515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 752a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Parse the next declarator. 7545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParmDeclarator.clear(); 7555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ParseDeclarator(ParmDeclarator); 7565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 757a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 758000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) { 7595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 7605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 7615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_parse_error); 7625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip to end of block or statement 7635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SkipUntil(tok::semi, true); 764000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.is(tok::semi)) 7655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ConsumeToken(); 7665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 768a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The actions module must verify that all arguments were declared. 770a3a835149ed4b183e3b009a1f94a6123779d696bDouglas Gregor Actions.ActOnFinishKNRParamDeclarations(CurScope, D, Tok.getLocation()); 7715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseAsmStringLiteral - This is just a normal string-literal, but is not 7755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// allowed to be a wide string, and is not subject to character translation. 7765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 7775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] asm-string-literal: 7785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal 7795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 780effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian RedlParser::OwningExprResult Parser::ParseAsmStringLiteral() { 7815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isTokenStringLiteral()) { 7825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok, diag::err_expected_string_literal); 78361364dddc33383e62cfe3b841dbc0f471280d95bSebastian Redl return ExprError(); 7845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 785a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 78620df9b7ab9388b2a488c5b1293cd196b1e073b4eSebastian Redl OwningExprResult Res(ParseStringLiteralExpression()); 787effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl if (Res.isInvalid()) return move(Res); 788a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 7895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Diagnose: wide string literal in 'asm' 790a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 791effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return move(Res); 7925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ParseSimpleAsm 7955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 7965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// [GNU] simple-asm-expr: 7975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 'asm' '(' asm-string-literal ')' 7985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 799ab197baec16bacade82325fb274cf6b992ac5d8aSebastian RedlParser::OwningExprResult Parser::ParseSimpleAsm(SourceLocation *EndLoc) { 800000732226610650837478cba97843d19b75f648eChris Lattner assert(Tok.is(tok::kw_asm) && "Not an asm!"); 801dfab6cb59a703f2ce4d58371652ce879f4c85a09Anders Carlsson SourceLocation Loc = ConsumeToken(); 802a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 803000732226610650837478cba97843d19b75f648eChris Lattner if (Tok.isNot(tok::l_paren)) { 8041ab3b96de160e4fbffec2a776e284a48a3bb543dChris Lattner Diag(Tok, diag::err_expected_lparen_after) << "asm"; 80561364dddc33383e62cfe3b841dbc0f471280d95bSebastian Redl return ExprError(); 8065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 807a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 808ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl Loc = ConsumeParen(); 809a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 810effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl OwningExprResult Result(ParseAsmStringLiteral()); 811a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 812ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl if (Result.isInvalid()) { 813ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl SkipUntil(tok::r_paren, true, true); 814ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl if (EndLoc) 815ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl *EndLoc = Tok.getLocation(); 816ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl ConsumeAnyToken(); 817ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl } else { 818ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl Loc = MatchRHSPunctuation(tok::r_paren, Loc); 819ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl if (EndLoc) 820ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl *EndLoc = Loc; 821ab197baec16bacade82325fb274cf6b992ac5d8aSebastian Redl } 822a6f0177a864ac478eb9890319f2e8ea03695e91dMike Stump 823effa8d1c97b00a3f53e972b0e61d9aade5ea1c57Sebastian Redl return move(Result); 8245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 826eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateTypeOrScopeToken - If the current token position is on a 827eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typename (possibly qualified in C++) or a C++ scope specifier not followed 828eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens 829eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// with a single annotation token representing the typename or C++ scope 830eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// respectively. 831eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// This simplifies handling of C++ scope specifiers and allows efficient 832eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// backtracking without the need to re-parse and resolve nested-names and 833eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// typenames. 83444802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// It will mainly be called when we expect to treat identifiers as typenames 83544802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// (if they are typenames). For example, in C we do not expect identifiers 83644802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// inside expressions to be treated as typenames so it will not be called 83744802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// for expressions in C. 83844802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// The benefit for C/ObjC is that a typename will be annotated and 839b43a50ff1b0b171ece84425b0ad83a9a31f038faSteve Naroff/// Actions.getTypeName will not be needed to be called again (e.g. getTypeName 84044802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// will not be called twice, once to check whether we have a declaration 84144802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// specifier, and another one to get the actual type inside 84244802cc435d5122701e4f1a9354381cff4b171c0Argyrios Kyrtzidis/// ParseDeclarationSpecifiers). 843a7bc7c880f86bc180684ef032d06df51bcae7a23Chris Lattner/// 844c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner/// This returns true if the token was annotated or an unrecoverable error 845c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner/// occurs. 8461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// 84755a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// Note that this routine emits an error if you call it with ::new or ::delete 84855a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// as the current tokens, so only call it in contexts where these are invalid. 849495c35d291da48c4f5655bbb54d15128ddde0d4dDouglas Gregorbool Parser::TryAnnotateTypeOrScopeToken(bool EnteringContext) { 8501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) 851d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor || Tok.is(tok::kw_typename)) && 8527452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner "Cannot be a type or scope token!"); 8531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 854d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor if (Tok.is(tok::kw_typename)) { 855d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor // Parse a C++ typename-specifier, e.g., "typename T::type". 856d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor // 857d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor // typename-specifier: 858d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor // 'typename' '::' [opt] nested-name-specifier identifier 8591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // 'typename' '::' [opt] nested-name-specifier template [opt] 8601734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor // simple-template-id 861d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor SourceLocation TypenameLoc = ConsumeToken(); 862d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor CXXScopeSpec SS; 8631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bool HadNestedNameSpecifier 8642dd078ae50ff7be1fb25ebeedde45e9ab691a4f0Douglas Gregor = ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false); 865d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor if (!HadNestedNameSpecifier) { 866d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename); 867d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor return false; 868d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor } 869d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor 870d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor TypeResult Ty; 871d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor if (Tok.is(tok::identifier)) { 872d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor // FIXME: check whether the next token is '<', first! 8731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Ty = Actions.ActOnTypenameType(TypenameLoc, SS, *Tok.getIdentifierInfo(), 874d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor Tok.getLocation()); 8751734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor } else if (Tok.is(tok::annot_template_id)) { 8761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump TemplateIdAnnotation *TemplateId 8771734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 8781734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor if (TemplateId->Kind == TNK_Function_template) { 8791734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor Diag(Tok, diag::err_typename_refers_to_non_type_template) 8801734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor << Tok.getAnnotationRange(); 8811734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor return false; 8821734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor } 883d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor 88431a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor AnnotateTemplateIdTokenAsType(0); 8851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(Tok.is(tok::annot_typename) && 8861734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor "AnnotateTemplateIdTokenAsType isn't working properly"); 88731a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor if (Tok.getAnnotationValue()) 88831a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor Ty = Actions.ActOnTypenameType(TypenameLoc, SS, SourceLocation(), 88931a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor Tok.getAnnotationValue()); 89031a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor else 89131a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor Ty = true; 8921734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor } else { 8931734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor Diag(Tok, diag::err_expected_type_name_after_typename) 8941734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor << SS.getRange(); 8951734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor return false; 8961734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor } 8971734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor 8981734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor Tok.setKind(tok::annot_typename); 89931a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor Tok.setAnnotationValue(Ty.isInvalid()? 0 : Ty.get()); 9001734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor Tok.setAnnotationEndLoc(Tok.getLocation()); 9011734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor Tok.setLocation(TypenameLoc); 9021734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor PP.AnnotateCachedTokens(Tok); 9031734317845d60307d474b5da8a8d33adbaf5e723Douglas Gregor return true; 904d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor } 905d57959af02b4af695276f4204443afe6e5d86bd8Douglas Gregor 906eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis CXXScopeSpec SS; 9074bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis if (getLang().CPlusPlus) 9082dd078ae50ff7be1fb25ebeedde45e9ab691a4f0Douglas Gregor ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, EnteringContext); 909eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 910eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis if (Tok.is(tok::identifier)) { 911608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // Determine whether the identifier is a type name. 9121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (TypeTy *Ty = Actions.getTypeName(*Tok.getIdentifierInfo(), 913b696ea3a0693798daeafd896d77f0b8f1fec3cc5Douglas Gregor Tok.getLocation(), CurScope, &SS)) { 914608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // This is a typename. Replace the current token in-place with an 915608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // annotation type token. 916b31757b68afe06ba442a05775d08fe7aa0f6f889Chris Lattner Tok.setKind(tok::annot_typename); 917608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Tok.setAnnotationValue(Ty); 918608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Tok.setAnnotationEndLoc(Tok.getLocation()); 919608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner if (SS.isNotEmpty()) // it was a C++ qualified type name. 920608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner Tok.setLocation(SS.getBeginLoc()); 9211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 922608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // In case the tokens were cached, have Preprocessor replace 923608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // them with the annotation token. 924608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner PP.AnnotateCachedTokens(Tok); 925608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner return true; 9261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 92739a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor 92839a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor if (!getLang().CPlusPlus) { 929608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // If we're in C, we can't have :: tokens at all (the lexer won't return 930608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner // them). If the identifier is not a type, then it can't be scope either, 9311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // just early exit. 932608d1fc9c4db3e3769f03a4f989d7692aefbf073Chris Lattner return false; 933eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis } 9341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 93539a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // If this is a template-id, annotate with a template-id or type token. 93655f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor if (NextToken().is(tok::less)) { 9377532dc66648cfe7432c9fe66dec5225f0ab301c6Douglas Gregor TemplateTy Template; 938014e88d94ff83e3aad4e33b16413a2d1817ec208Douglas Gregor UnqualifiedId TemplateName; 939014e88d94ff83e3aad4e33b16413a2d1817ec208Douglas Gregor TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); 9401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (TemplateNameKind TNK 941014e88d94ff83e3aad4e33b16413a2d1817ec208Douglas Gregor = Actions.isTemplateName(CurScope, SS, TemplateName, 9421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump /*ObjectType=*/0, EnteringContext, 943ca1bdd7c269a2390d43c040a60511edd017ee130Douglas Gregor Template)) { 944ca1bdd7c269a2390d43c040a60511edd017ee130Douglas Gregor // Consume the identifier. 945ca1bdd7c269a2390d43c040a60511edd017ee130Douglas Gregor ConsumeToken(); 946ca1bdd7c269a2390d43c040a60511edd017ee130Douglas Gregor if (AnnotateTemplateIdToken(Template, TNK, &SS, TemplateName)) { 947c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner // If an unrecoverable error occurred, we need to return true here, 948c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner // because the token stream is in a damaged state. We may not return 949c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner // a valid identifier. 950c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner return Tok.isNot(tok::identifier); 951c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner } 952ca1bdd7c269a2390d43c040a60511edd017ee130Douglas Gregor } 95355f6b14230c94272efbbcdd89a92224c8db9f225Douglas Gregor } 954d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor 95539a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // The current token, which is either an identifier or a 95639a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // template-id, is not part of the annotation. Fall through to 95739a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // push that token back into the stream and complete the C++ scope 95839a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // specifier annotation. 9591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 960eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 96139a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor if (Tok.is(tok::annot_template_id)) { 9621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump TemplateIdAnnotation *TemplateId 96339a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 964c45c232440dfafedca1a3773b904fb42609b1b19Douglas Gregor if (TemplateId->Kind == TNK_Type_template) { 96539a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // A template-id that refers to a type was parsed into a 96639a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // template-id annotation in a context where we weren't allowed 96739a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // to produce a type annotation token. Update the template-id 96839a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor // annotation token to a type annotation token now. 96931a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor AnnotateTemplateIdTokenAsType(&SS); 97031a19b6989bbf326d2de5ae12e712e2a65ca9c34Douglas Gregor return true; 97139a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor } 97239a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor } 973d6fb7ef028d9aa0b3e8943b7bc049c524437b407Douglas Gregor 9746ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner if (SS.isEmpty()) 9753c9028a5e8dfb120c0d917849a1f79c091a98b88Eli Friedman return Tok.isNot(tok::identifier) && Tok.isNot(tok::coloncolon); 9761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9776ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // A C++ scope specifier that isn't followed by a typename. 9786ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // Push the current token back into the token stream (or revert it if it is 9796ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // cached) and use an annotation scope token for current token. 9806ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner if (PP.isBacktrackEnabled()) 9816ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.RevertCachedTokens(1); 9826ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner else 9836ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.EnterToken(Tok); 9846ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setKind(tok::annot_cxxscope); 9853507369940bfb269551bfa1fec812481f60e3552Douglas Gregor Tok.setAnnotationValue(SS.getScopeRep()); 9866ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setAnnotationRange(SS.getRange()); 9876ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner 9886ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // In case the tokens were cached, have Preprocessor replace them with the 9896ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // annotation token. 9906ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.AnnotateCachedTokens(Tok); 991a7bc7c880f86bc180684ef032d06df51bcae7a23Chris Lattner return true; 992eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 993eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 994eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis/// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only 99539a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor/// annotates C++ scope specifiers and template-ids. This returns 996c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner/// true if the token was annotated or there was an error that could not be 997c8e27cc402043ec86c1698c09e4ee9e415b16207Chris Lattner/// recovered from. 9981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// 99955a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// Note that this routine emits an error if you call it with ::new or ::delete 100055a7cefc846765ac7d142a63f773747a20518d71Chris Lattner/// as the current tokens, so only call it in contexts where these are invalid. 1001495c35d291da48c4f5655bbb54d15128ddde0d4dDouglas Gregorbool Parser::TryAnnotateCXXScopeToken(bool EnteringContext) { 10024bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis assert(getLang().CPlusPlus && 10036ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner "Call sites of this function should be guarded by checking for C++"); 10047452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && 10057452c6fc567ea1799f617395d0fa4c7ed075e5d9Chris Lattner "Cannot be a type or scope token!"); 1006eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 10074bdd91c09fd59e0c154d759288beff300e31e1d0Argyrios Kyrtzidis CXXScopeSpec SS; 10082dd078ae50ff7be1fb25ebeedde45e9ab691a4f0Douglas Gregor if (!ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, EnteringContext)) 100939a8de10c18365bde7062d8959b7ed525449c561Douglas Gregor return Tok.is(tok::annot_template_id); 1010eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis 10116ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // Push the current token back into the token stream (or revert it if it is 10126ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // cached) and use an annotation scope token for current token. 10136ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner if (PP.isBacktrackEnabled()) 10146ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.RevertCachedTokens(1); 10156ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner else 10166ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.EnterToken(Tok); 10176ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setKind(tok::annot_cxxscope); 10183507369940bfb269551bfa1fec812481f60e3552Douglas Gregor Tok.setAnnotationValue(SS.getScopeRep()); 10196ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner Tok.setAnnotationRange(SS.getRange()); 10206ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner 10216ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // In case the tokens were cached, have Preprocessor replace them with the 10226ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner // annotation token. 10236ec76d45bd3111013c357f16e08720407c2f9ae8Chris Lattner PP.AnnotateCachedTokens(Tok); 10245e02c47a7085831586344a9728763cb50540c7f7Chris Lattner return true; 1025eb83ecde1a822b1c38cd060a85a08c1ac9f82cf8Argyrios Kyrtzidis} 10266c94a6d77f456f23ecd4c2061e6413786b5e6571John McCall 10276c94a6d77f456f23ecd4c2061e6413786b5e6571John McCall// Anchor the Parser::FieldCallback vtable to this translation unit. 10286c94a6d77f456f23ecd4c2061e6413786b5e6571John McCall// We use a spurious method instead of the destructor because 10296c94a6d77f456f23ecd4c2061e6413786b5e6571John McCall// destroying FieldCallbacks can actually be slightly 10306c94a6d77f456f23ecd4c2061e6413786b5e6571John McCall// performance-sensitive. 10316c94a6d77f456f23ecd4c2061e6413786b5e6571John McCallvoid Parser::FieldCallback::_anchor() { 10326c94a6d77f456f23ecd4c2061e6413786b5e6571John McCall} 1033