Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- Parser.cpp - C Language Family Parser ----------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 0bc735f | 2007-12-29 19:59:25 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file implements the Parser interfaces. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "clang/Parse/Parser.h" |
Chris Lattner | 500d329 | 2009-01-29 05:15:15 +0000 | [diff] [blame] | 15 | #include "clang/Parse/ParseDiagnostic.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 16 | #include "clang/Parse/DeclSpec.h" |
| 17 | #include "clang/Parse/Scope.h" |
Douglas Gregor | 314b97f | 2009-11-10 19:49:08 +0000 | [diff] [blame] | 18 | #include "clang/Parse/Template.h" |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 19 | #include "llvm/Support/raw_ostream.h" |
Chris Lattner | d167ca0 | 2009-12-10 00:21:05 +0000 | [diff] [blame] | 20 | #include "RAIIObjectsForParser.h" |
Daniel Dunbar | fcdd8fe | 2008-10-04 19:21:03 +0000 | [diff] [blame] | 21 | #include "ParsePragma.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 22 | using namespace clang; |
| 23 | |
Douglas Gregor | 2e22253 | 2009-07-02 17:08:52 +0000 | [diff] [blame] | 24 | /// \brief A comment handler that passes comments found by the preprocessor |
| 25 | /// to the parser action. |
| 26 | class ActionCommentHandler : public CommentHandler { |
| 27 | Action &Actions; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 28 | |
Douglas Gregor | 2e22253 | 2009-07-02 17:08:52 +0000 | [diff] [blame] | 29 | public: |
| 30 | explicit ActionCommentHandler(Action &Actions) : Actions(Actions) { } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 31 | |
Chris Lattner | 046c227 | 2010-01-18 22:35:47 +0000 | [diff] [blame] | 32 | virtual bool HandleComment(Preprocessor &PP, SourceRange Comment) { |
Douglas Gregor | 2e22253 | 2009-07-02 17:08:52 +0000 | [diff] [blame] | 33 | Actions.ActOnComment(Comment); |
Chris Lattner | 046c227 | 2010-01-18 22:35:47 +0000 | [diff] [blame] | 34 | return false; |
Douglas Gregor | 2e22253 | 2009-07-02 17:08:52 +0000 | [diff] [blame] | 35 | } |
| 36 | }; |
| 37 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 38 | Parser::Parser(Preprocessor &pp, Action &actions) |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 39 | : CrashInfo(*this), PP(pp), Actions(actions), Diags(PP.getDiagnostics()), |
Chris Lattner | 08d92ec | 2009-12-10 00:32:41 +0000 | [diff] [blame] | 40 | GreaterThanIsOperator(true), ColonIsSacred(false), |
| 41 | TemplateParameterDepth(0) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 42 | Tok.setKind(tok::eof); |
| 43 | CurScope = 0; |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 44 | NumCachedScopes = 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 45 | ParenCount = BracketCount = BraceCount = 0; |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 46 | ObjCImpDecl = DeclPtrTy(); |
Daniel Dunbar | fcdd8fe | 2008-10-04 19:21:03 +0000 | [diff] [blame] | 47 | |
| 48 | // Add #pragma handlers. These are removed and destroyed in the |
| 49 | // destructor. |
Ted Kremenek | 4726d03 | 2009-03-23 22:28:25 +0000 | [diff] [blame] | 50 | PackHandler.reset(new |
| 51 | PragmaPackHandler(&PP.getIdentifierTable().get("pack"), actions)); |
| 52 | PP.AddPragmaHandler(0, PackHandler.get()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 53 | |
Ted Kremenek | 4726d03 | 2009-03-23 22:28:25 +0000 | [diff] [blame] | 54 | UnusedHandler.reset(new |
| 55 | PragmaUnusedHandler(&PP.getIdentifierTable().get("unused"), actions, |
| 56 | *this)); |
| 57 | PP.AddPragmaHandler(0, UnusedHandler.get()); |
Eli Friedman | 9991479 | 2009-06-05 00:49:58 +0000 | [diff] [blame] | 58 | |
| 59 | WeakHandler.reset(new |
| 60 | PragmaWeakHandler(&PP.getIdentifierTable().get("weak"), actions)); |
| 61 | PP.AddPragmaHandler(0, WeakHandler.get()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 62 | |
Douglas Gregor | 2e22253 | 2009-07-02 17:08:52 +0000 | [diff] [blame] | 63 | CommentHandler.reset(new ActionCommentHandler(actions)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 64 | PP.AddCommentHandler(CommentHandler.get()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 65 | } |
| 66 | |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 67 | /// If a crash happens while the parser is active, print out a line indicating |
| 68 | /// what the current token is. |
| 69 | void PrettyStackTraceParserEntry::print(llvm::raw_ostream &OS) const { |
| 70 | const Token &Tok = P.getCurToken(); |
Chris Lattner | ddcbc0a | 2009-03-05 07:27:50 +0000 | [diff] [blame] | 71 | if (Tok.is(tok::eof)) { |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 72 | OS << "<eof> parser at end of file\n"; |
| 73 | return; |
| 74 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 75 | |
Chris Lattner | ddcbc0a | 2009-03-05 07:27:50 +0000 | [diff] [blame] | 76 | if (Tok.getLocation().isInvalid()) { |
| 77 | OS << "<unknown> parser at unknown location\n"; |
| 78 | return; |
| 79 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 80 | |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 81 | const Preprocessor &PP = P.getPreprocessor(); |
| 82 | Tok.getLocation().print(OS, PP.getSourceManager()); |
Daniel Dunbar | 9fa31dd | 2009-10-17 06:13:04 +0000 | [diff] [blame] | 83 | if (Tok.isAnnotation()) |
| 84 | OS << ": at annotation token \n"; |
| 85 | else |
| 86 | OS << ": current parser token '" << PP.getSpelling(Tok) << "'\n"; |
Douglas Gregor | f780abc | 2008-12-30 03:27:21 +0000 | [diff] [blame] | 87 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 88 | |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 89 | |
Chris Lattner | 3cbfe2c | 2008-11-22 00:59:29 +0000 | [diff] [blame] | 90 | DiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) { |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 91 | return Diags.Report(FullSourceLoc(Loc, PP.getSourceManager()), DiagID); |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 92 | } |
| 93 | |
Chris Lattner | 3cbfe2c | 2008-11-22 00:59:29 +0000 | [diff] [blame] | 94 | DiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) { |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 95 | return Diag(Tok.getLocation(), DiagID); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 96 | } |
| 97 | |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 98 | /// \brief Emits a diagnostic suggesting parentheses surrounding a |
| 99 | /// given range. |
| 100 | /// |
| 101 | /// \param Loc The location where we'll emit the diagnostic. |
| 102 | /// \param Loc The kind of diagnostic to emit. |
| 103 | /// \param ParenRange Source range enclosing code that should be parenthesized. |
| 104 | void Parser::SuggestParentheses(SourceLocation Loc, unsigned DK, |
| 105 | SourceRange ParenRange) { |
Douglas Gregor | b2fb6de | 2009-02-27 17:53:17 +0000 | [diff] [blame] | 106 | SourceLocation EndLoc = PP.getLocForEndOfToken(ParenRange.getEnd()); |
| 107 | if (!ParenRange.getEnd().isFileID() || EndLoc.isInvalid()) { |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 108 | // We can't display the parentheses, so just dig the |
| 109 | // warning/error and return. |
| 110 | Diag(Loc, DK); |
| 111 | return; |
| 112 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 113 | |
| 114 | Diag(Loc, DK) |
Douglas Gregor | b2fb6de | 2009-02-27 17:53:17 +0000 | [diff] [blame] | 115 | << CodeModificationHint::CreateInsertion(ParenRange.getBegin(), "(") |
| 116 | << CodeModificationHint::CreateInsertion(EndLoc, ")"); |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 117 | } |
| 118 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 119 | /// MatchRHSPunctuation - For punctuation with a LHS and RHS (e.g. '['/']'), |
| 120 | /// this helper function matches and consumes the specified RHS token if |
| 121 | /// present. If not present, it emits the specified diagnostic indicating |
| 122 | /// that the parser failed to match the RHS of the token at LHSLoc. LHSName |
| 123 | /// should be the name of the unmatched LHS token. |
| 124 | SourceLocation Parser::MatchRHSPunctuation(tok::TokenKind RHSTok, |
| 125 | SourceLocation LHSLoc) { |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 126 | |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 127 | if (Tok.is(RHSTok)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 128 | return ConsumeAnyToken(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 129 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 130 | SourceLocation R = Tok.getLocation(); |
| 131 | const char *LHSName = "unknown"; |
| 132 | diag::kind DID = diag::err_parse_error; |
| 133 | switch (RHSTok) { |
| 134 | default: break; |
| 135 | case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break; |
| 136 | case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break; |
| 137 | case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break; |
| 138 | case tok::greater: LHSName = "<"; DID = diag::err_expected_greater; break; |
| 139 | } |
| 140 | Diag(Tok, DID); |
Chris Lattner | 28eb7e9 | 2008-11-23 23:17:07 +0000 | [diff] [blame] | 141 | Diag(LHSLoc, diag::note_matching) << LHSName; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 142 | SkipUntil(RHSTok); |
| 143 | return R; |
| 144 | } |
| 145 | |
| 146 | /// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the |
| 147 | /// input. If so, it is consumed and false is returned. |
| 148 | /// |
| 149 | /// If the input is malformed, this emits the specified diagnostic. Next, if |
| 150 | /// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is |
| 151 | /// returned. |
| 152 | bool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID, |
| 153 | const char *Msg, tok::TokenKind SkipToTok) { |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 154 | if (Tok.is(ExpectedTok)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 155 | ConsumeAnyToken(); |
| 156 | return false; |
| 157 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 158 | |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 159 | const char *Spelling = 0; |
Douglas Gregor | b2fb6de | 2009-02-27 17:53:17 +0000 | [diff] [blame] | 160 | SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 161 | if (EndLoc.isValid() && |
Douglas Gregor | b2fb6de | 2009-02-27 17:53:17 +0000 | [diff] [blame] | 162 | (Spelling = tok::getTokenSimpleSpelling(ExpectedTok))) { |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 163 | // Show what code to insert to fix this problem. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 164 | Diag(EndLoc, DiagID) |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 165 | << Msg |
Douglas Gregor | b2fb6de | 2009-02-27 17:53:17 +0000 | [diff] [blame] | 166 | << CodeModificationHint::CreateInsertion(EndLoc, Spelling); |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 167 | } else |
| 168 | Diag(Tok, DiagID) << Msg; |
| 169 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 170 | if (SkipToTok != tok::unknown) |
| 171 | SkipUntil(SkipToTok); |
| 172 | return true; |
| 173 | } |
| 174 | |
| 175 | //===----------------------------------------------------------------------===// |
| 176 | // Error recovery. |
| 177 | //===----------------------------------------------------------------------===// |
| 178 | |
| 179 | /// SkipUntil - Read tokens until we get to the specified token, then consume |
Chris Lattner | 012cf46 | 2007-07-24 17:03:04 +0000 | [diff] [blame] | 180 | /// it (unless DontConsume is true). Because we cannot guarantee that the |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 181 | /// token will ever occur, this skips to the next token, or to some likely |
| 182 | /// good stopping point. If StopAtSemi is true, skipping will stop at a ';' |
| 183 | /// character. |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 184 | /// |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 185 | /// If SkipUntil finds the specified token, it returns true, otherwise it |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 186 | /// returns false. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 187 | bool Parser::SkipUntil(const tok::TokenKind *Toks, unsigned NumToks, |
| 188 | bool StopAtSemi, bool DontConsume) { |
| 189 | // We always want this function to skip at least one token if the first token |
| 190 | // isn't T and if not at EOF. |
| 191 | bool isFirstTokenSkipped = true; |
| 192 | while (1) { |
| 193 | // If we found one of the tokens, stop and return true. |
| 194 | for (unsigned i = 0; i != NumToks; ++i) { |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 195 | if (Tok.is(Toks[i])) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 196 | if (DontConsume) { |
| 197 | // Noop, don't consume the token. |
| 198 | } else { |
| 199 | ConsumeAnyToken(); |
| 200 | } |
| 201 | return true; |
| 202 | } |
| 203 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 204 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 205 | switch (Tok.getKind()) { |
| 206 | case tok::eof: |
| 207 | // Ran out of tokens. |
| 208 | return false; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 209 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 210 | case tok::l_paren: |
| 211 | // Recursively skip properly-nested parens. |
| 212 | ConsumeParen(); |
| 213 | SkipUntil(tok::r_paren, false); |
| 214 | break; |
| 215 | case tok::l_square: |
| 216 | // Recursively skip properly-nested square brackets. |
| 217 | ConsumeBracket(); |
| 218 | SkipUntil(tok::r_square, false); |
| 219 | break; |
| 220 | case tok::l_brace: |
| 221 | // Recursively skip properly-nested braces. |
| 222 | ConsumeBrace(); |
| 223 | SkipUntil(tok::r_brace, false); |
| 224 | break; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 225 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 226 | // Okay, we found a ']' or '}' or ')', which we think should be balanced. |
| 227 | // Since the user wasn't looking for this token (if they were, it would |
| 228 | // already be handled), this isn't balanced. If there is a LHS token at a |
| 229 | // higher level, we will assume that this matches the unbalanced token |
| 230 | // and return it. Otherwise, this is a spurious RHS token, which we skip. |
| 231 | case tok::r_paren: |
| 232 | if (ParenCount && !isFirstTokenSkipped) |
| 233 | return false; // Matches something. |
| 234 | ConsumeParen(); |
| 235 | break; |
| 236 | case tok::r_square: |
| 237 | if (BracketCount && !isFirstTokenSkipped) |
| 238 | return false; // Matches something. |
| 239 | ConsumeBracket(); |
| 240 | break; |
| 241 | case tok::r_brace: |
| 242 | if (BraceCount && !isFirstTokenSkipped) |
| 243 | return false; // Matches something. |
| 244 | ConsumeBrace(); |
| 245 | break; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 246 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 247 | case tok::string_literal: |
| 248 | case tok::wide_string_literal: |
| 249 | ConsumeStringToken(); |
| 250 | break; |
| 251 | case tok::semi: |
| 252 | if (StopAtSemi) |
| 253 | return false; |
| 254 | // FALL THROUGH. |
| 255 | default: |
| 256 | // Skip this token. |
| 257 | ConsumeToken(); |
| 258 | break; |
| 259 | } |
| 260 | isFirstTokenSkipped = false; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 261 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | //===----------------------------------------------------------------------===// |
| 265 | // Scope manipulation |
| 266 | //===----------------------------------------------------------------------===// |
| 267 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 268 | /// EnterScope - Start a new scope. |
| 269 | void Parser::EnterScope(unsigned ScopeFlags) { |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 270 | if (NumCachedScopes) { |
| 271 | Scope *N = ScopeCache[--NumCachedScopes]; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 272 | N->Init(CurScope, ScopeFlags); |
| 273 | CurScope = N; |
| 274 | } else { |
| 275 | CurScope = new Scope(CurScope, ScopeFlags); |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | /// ExitScope - Pop a scope off the scope stack. |
| 280 | void Parser::ExitScope() { |
| 281 | assert(CurScope && "Scope imbalance!"); |
| 282 | |
Chris Lattner | 90ae68a | 2007-10-09 20:37:18 +0000 | [diff] [blame] | 283 | // Inform the actions module that this scope is going away if there are any |
| 284 | // decls in it. |
| 285 | if (!CurScope->decl_empty()) |
Steve Naroff | b216c88 | 2007-10-09 22:01:59 +0000 | [diff] [blame] | 286 | Actions.ActOnPopScope(Tok.getLocation(), CurScope); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 287 | |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 288 | Scope *OldScope = CurScope; |
| 289 | CurScope = OldScope->getParent(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 290 | |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 291 | if (NumCachedScopes == ScopeCacheSize) |
| 292 | delete OldScope; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 293 | else |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 294 | ScopeCache[NumCachedScopes++] = OldScope; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | |
| 298 | |
| 299 | |
| 300 | //===----------------------------------------------------------------------===// |
| 301 | // C99 6.9: External Definitions. |
| 302 | //===----------------------------------------------------------------------===// |
| 303 | |
| 304 | Parser::~Parser() { |
| 305 | // If we still have scopes active, delete the scope tree. |
| 306 | delete CurScope; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 307 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 308 | // Free the scope cache. |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 309 | for (unsigned i = 0, e = NumCachedScopes; i != e; ++i) |
| 310 | delete ScopeCache[i]; |
Daniel Dunbar | fcdd8fe | 2008-10-04 19:21:03 +0000 | [diff] [blame] | 311 | |
| 312 | // Remove the pragma handlers we installed. |
Ted Kremenek | 4726d03 | 2009-03-23 22:28:25 +0000 | [diff] [blame] | 313 | PP.RemovePragmaHandler(0, PackHandler.get()); |
| 314 | PackHandler.reset(); |
| 315 | PP.RemovePragmaHandler(0, UnusedHandler.get()); |
| 316 | UnusedHandler.reset(); |
Eli Friedman | 9991479 | 2009-06-05 00:49:58 +0000 | [diff] [blame] | 317 | PP.RemovePragmaHandler(0, WeakHandler.get()); |
| 318 | WeakHandler.reset(); |
Douglas Gregor | 2e22253 | 2009-07-02 17:08:52 +0000 | [diff] [blame] | 319 | PP.RemoveCommentHandler(CommentHandler.get()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | /// Initialize - Warm up the parser. |
| 323 | /// |
| 324 | void Parser::Initialize() { |
| 325 | // Prime the lexer look-ahead. |
| 326 | ConsumeToken(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 327 | |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 328 | // Create the translation unit scope. Install it as the current scope. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 329 | assert(CurScope == 0 && "A scope is already active?"); |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 330 | EnterScope(Scope::DeclScope); |
Steve Naroff | b216c88 | 2007-10-09 22:01:59 +0000 | [diff] [blame] | 331 | Actions.ActOnTranslationUnitScope(Tok.getLocation(), CurScope); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 332 | |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 333 | if (Tok.is(tok::eof) && |
Chris Lattner | f726175 | 2007-08-25 05:47:03 +0000 | [diff] [blame] | 334 | !getLang().CPlusPlus) // Empty source file is an extension in C |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 335 | Diag(Tok, diag::ext_empty_source_file); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 336 | |
Chris Lattner | 34870da | 2007-08-29 22:54:08 +0000 | [diff] [blame] | 337 | // Initialization for Objective-C context sensitive keywords recognition. |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 338 | // Referenced in Parser::ParseObjCTypeQualifierList. |
Chris Lattner | 34870da | 2007-08-29 22:54:08 +0000 | [diff] [blame] | 339 | if (getLang().ObjC1) { |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 340 | ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in"); |
| 341 | ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out"); |
| 342 | ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout"); |
| 343 | ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway"); |
| 344 | ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy"); |
| 345 | ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref"); |
Chris Lattner | 34870da | 2007-08-29 22:54:08 +0000 | [diff] [blame] | 346 | } |
Daniel Dunbar | 662e8b5 | 2008-08-14 22:04:54 +0000 | [diff] [blame] | 347 | |
| 348 | Ident_super = &PP.getIdentifierTable().get("super"); |
John Thompson | 82287d1 | 2010-02-05 00:12:22 +0000 | [diff] [blame] | 349 | |
| 350 | if (getLang().AltiVec) { |
| 351 | Ident_vector = &PP.getIdentifierTable().get("vector"); |
| 352 | Ident_pixel = &PP.getIdentifierTable().get("pixel"); |
| 353 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | /// ParseTopLevelDecl - Parse one top-level declaration, return whatever the |
| 357 | /// action tells us to. This returns true if the EOF was encountered. |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 358 | bool Parser::ParseTopLevelDecl(DeclGroupPtrTy &Result) { |
| 359 | Result = DeclGroupPtrTy(); |
Chris Lattner | 9299f3f | 2008-08-23 03:19:52 +0000 | [diff] [blame] | 360 | if (Tok.is(tok::eof)) { |
| 361 | Actions.ActOnEndOfTranslationUnit(); |
| 362 | return true; |
| 363 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 364 | |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 365 | CXX0XAttributeList Attr; |
| 366 | if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) |
| 367 | Attr = ParseCXX0XAttributes(); |
| 368 | Result = ParseExternalDeclaration(Attr); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 369 | return false; |
| 370 | } |
| 371 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 372 | /// ParseTranslationUnit: |
| 373 | /// translation-unit: [C99 6.9] |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 374 | /// external-declaration |
| 375 | /// translation-unit external-declaration |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 376 | void Parser::ParseTranslationUnit() { |
Douglas Gregor | 8935b8b | 2008-12-10 06:34:36 +0000 | [diff] [blame] | 377 | Initialize(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 378 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 379 | DeclGroupPtrTy Res; |
Steve Naroff | 89307ff | 2007-11-29 23:05:20 +0000 | [diff] [blame] | 380 | while (!ParseTopLevelDecl(Res)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 381 | /*parse them all*/; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 382 | |
Chris Lattner | 06f5485 | 2008-08-23 02:00:52 +0000 | [diff] [blame] | 383 | ExitScope(); |
| 384 | assert(CurScope == 0 && "Scope imbalance!"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 385 | } |
| 386 | |
| 387 | /// ParseExternalDeclaration: |
Chris Lattner | 90b93d6 | 2008-12-08 21:59:01 +0000 | [diff] [blame] | 388 | /// |
Douglas Gregor | c19923d | 2008-11-21 16:10:08 +0000 | [diff] [blame] | 389 | /// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl] |
Chris Lattner | c301815 | 2007-08-10 20:57:02 +0000 | [diff] [blame] | 390 | /// function-definition |
| 391 | /// declaration |
Douglas Gregor | a1d71ae | 2009-08-24 12:17:54 +0000 | [diff] [blame] | 392 | /// [C++0x] empty-declaration |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 393 | /// [GNU] asm-definition |
Chris Lattner | c301815 | 2007-08-10 20:57:02 +0000 | [diff] [blame] | 394 | /// [GNU] __extension__ external-declaration |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 395 | /// [OBJC] objc-class-definition |
| 396 | /// [OBJC] objc-class-declaration |
| 397 | /// [OBJC] objc-alias-declaration |
| 398 | /// [OBJC] objc-protocol-definition |
| 399 | /// [OBJC] objc-method-definition |
| 400 | /// [OBJC] @end |
Douglas Gregor | c19923d | 2008-11-21 16:10:08 +0000 | [diff] [blame] | 401 | /// [C++] linkage-specification |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 402 | /// [GNU] asm-definition: |
| 403 | /// simple-asm-expr ';' |
| 404 | /// |
Douglas Gregor | a1d71ae | 2009-08-24 12:17:54 +0000 | [diff] [blame] | 405 | /// [C++0x] empty-declaration: |
| 406 | /// ';' |
| 407 | /// |
Douglas Gregor | 45f9655 | 2009-09-04 06:33:52 +0000 | [diff] [blame] | 408 | /// [C++0x/GNU] 'extern' 'template' declaration |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 409 | Parser::DeclGroupPtrTy Parser::ParseExternalDeclaration(CXX0XAttributeList Attr) { |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 410 | DeclPtrTy SingleDecl; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 411 | switch (Tok.getKind()) { |
| 412 | case tok::semi: |
Douglas Gregor | a1d71ae | 2009-08-24 12:17:54 +0000 | [diff] [blame] | 413 | if (!getLang().CPlusPlus0x) |
| 414 | Diag(Tok, diag::ext_top_level_semi) |
Chris Lattner | 29d9c1a | 2009-12-06 17:36:05 +0000 | [diff] [blame] | 415 | << CodeModificationHint::CreateRemoval(Tok.getLocation()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 416 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 417 | ConsumeToken(); |
| 418 | // TODO: Invoke action for top-level semicolon. |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 419 | return DeclGroupPtrTy(); |
Chris Lattner | 90b93d6 | 2008-12-08 21:59:01 +0000 | [diff] [blame] | 420 | case tok::r_brace: |
| 421 | Diag(Tok, diag::err_expected_external_declaration); |
| 422 | ConsumeBrace(); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 423 | return DeclGroupPtrTy(); |
Chris Lattner | 90b93d6 | 2008-12-08 21:59:01 +0000 | [diff] [blame] | 424 | case tok::eof: |
| 425 | Diag(Tok, diag::err_expected_external_declaration); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 426 | return DeclGroupPtrTy(); |
Chris Lattner | c301815 | 2007-08-10 20:57:02 +0000 | [diff] [blame] | 427 | case tok::kw___extension__: { |
Chris Lattner | c46d1a1 | 2008-10-20 06:45:43 +0000 | [diff] [blame] | 428 | // __extension__ silences extension warnings in the subexpression. |
| 429 | ExtensionRAIIObject O(Diags); // Use RAII to do this. |
Chris Lattner | 39146d6 | 2008-10-20 06:51:33 +0000 | [diff] [blame] | 430 | ConsumeToken(); |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 431 | return ParseExternalDeclaration(Attr); |
Chris Lattner | c301815 | 2007-08-10 20:57:02 +0000 | [diff] [blame] | 432 | } |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 433 | case tok::kw_asm: { |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 434 | if (Attr.HasAttr) |
| 435 | Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) |
| 436 | << Attr.Range; |
| 437 | |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 438 | OwningExprResult Result(ParseSimpleAsm()); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 439 | |
Anders Carlsson | 3f9424f | 2008-02-08 00:23:11 +0000 | [diff] [blame] | 440 | ExpectAndConsume(tok::semi, diag::err_expected_semi_after, |
| 441 | "top-level asm block"); |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 442 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 443 | if (Result.isInvalid()) |
| 444 | return DeclGroupPtrTy(); |
| 445 | SingleDecl = Actions.ActOnFileScopeAsmDecl(Tok.getLocation(), move(Result)); |
| 446 | break; |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 447 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 448 | case tok::at: |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 449 | // @ is not a legal token unless objc is enabled, no need to check for ObjC. |
| 450 | /// FIXME: ParseObjCAtDirectives should return a DeclGroup for things like |
| 451 | /// @class foo, bar; |
| 452 | SingleDecl = ParseObjCAtDirectives(); |
| 453 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 454 | case tok::minus: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 455 | case tok::plus: |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 456 | if (!getLang().ObjC1) { |
| 457 | Diag(Tok, diag::err_expected_external_declaration); |
| 458 | ConsumeToken(); |
| 459 | return DeclGroupPtrTy(); |
| 460 | } |
| 461 | SingleDecl = ParseObjCMethodDefinition(); |
| 462 | break; |
Douglas Gregor | 791215b | 2009-09-21 20:51:25 +0000 | [diff] [blame] | 463 | case tok::code_completion: |
Douglas Gregor | b6ac245 | 2010-01-13 21:24:21 +0000 | [diff] [blame] | 464 | Actions.CodeCompleteOrdinaryName(CurScope, |
| 465 | ObjCImpDecl? Action::CCC_ObjCImplementation |
| 466 | : Action::CCC_Namespace); |
Douglas Gregor | 791215b | 2009-09-21 20:51:25 +0000 | [diff] [blame] | 467 | ConsumeToken(); |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 468 | return ParseExternalDeclaration(Attr); |
Douglas Gregor | f780abc | 2008-12-30 03:27:21 +0000 | [diff] [blame] | 469 | case tok::kw_using: |
Chris Lattner | 8f08cb7 | 2007-08-25 06:57:03 +0000 | [diff] [blame] | 470 | case tok::kw_namespace: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 471 | case tok::kw_typedef: |
Douglas Gregor | adcac88 | 2008-12-01 23:54:00 +0000 | [diff] [blame] | 472 | case tok::kw_template: |
| 473 | case tok::kw_export: // As in 'export template' |
Anders Carlsson | 511d7ab | 2009-03-11 16:27:10 +0000 | [diff] [blame] | 474 | case tok::kw_static_assert: |
Chris Lattner | bae3511 | 2007-08-25 18:15:16 +0000 | [diff] [blame] | 475 | // A function definition cannot start with a these keywords. |
Chris Lattner | 97144fc | 2009-04-02 04:16:50 +0000 | [diff] [blame] | 476 | { |
| 477 | SourceLocation DeclEnd; |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 478 | return ParseDeclaration(Declarator::FileContext, DeclEnd, Attr); |
Chris Lattner | 97144fc | 2009-04-02 04:16:50 +0000 | [diff] [blame] | 479 | } |
Douglas Gregor | 45f9655 | 2009-09-04 06:33:52 +0000 | [diff] [blame] | 480 | case tok::kw_extern: |
| 481 | if (getLang().CPlusPlus && NextToken().is(tok::kw_template)) { |
| 482 | // Extern templates |
| 483 | SourceLocation ExternLoc = ConsumeToken(); |
| 484 | SourceLocation TemplateLoc = ConsumeToken(); |
| 485 | SourceLocation DeclEnd; |
| 486 | return Actions.ConvertDeclToDeclGroup( |
| 487 | ParseExplicitInstantiation(ExternLoc, TemplateLoc, DeclEnd)); |
| 488 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 489 | |
Douglas Gregor | 45f9655 | 2009-09-04 06:33:52 +0000 | [diff] [blame] | 490 | // FIXME: Detect C++ linkage specifications here? |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 491 | |
Douglas Gregor | 45f9655 | 2009-09-04 06:33:52 +0000 | [diff] [blame] | 492 | // Fall through to handle other declarations or function definitions. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 493 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 494 | default: |
| 495 | // We can't tell whether this is a function-definition or declaration yet. |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 496 | return ParseDeclarationOrFunctionDefinition(Attr.AttrList); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 497 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 498 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 499 | // This routine returns a DeclGroup, if the thing we parsed only contains a |
| 500 | // single decl, convert it now. |
| 501 | return Actions.ConvertDeclToDeclGroup(SingleDecl); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 502 | } |
| 503 | |
Douglas Gregor | 1426e53 | 2009-05-12 21:31:51 +0000 | [diff] [blame] | 504 | /// \brief Determine whether the current token, if it occurs after a |
| 505 | /// declarator, continues a declaration or declaration list. |
| 506 | bool Parser::isDeclarationAfterDeclarator() { |
| 507 | return Tok.is(tok::equal) || // int X()= -> not a function def |
| 508 | Tok.is(tok::comma) || // int X(), -> not a function def |
| 509 | Tok.is(tok::semi) || // int X(); -> not a function def |
| 510 | Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def |
| 511 | Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def |
| 512 | (getLang().CPlusPlus && |
| 513 | Tok.is(tok::l_paren)); // int X(0) -> not a function def [C++] |
| 514 | } |
| 515 | |
| 516 | /// \brief Determine whether the current token, if it occurs after a |
| 517 | /// declarator, indicates the start of a function definition. |
| 518 | bool Parser::isStartOfFunctionDefinition() { |
Chris Lattner | 5d1c619 | 2009-12-06 18:34:27 +0000 | [diff] [blame] | 519 | if (Tok.is(tok::l_brace)) // int X() {} |
| 520 | return true; |
| 521 | |
| 522 | if (!getLang().CPlusPlus) |
| 523 | return isDeclarationSpecifier(); // int X(f) int f; {} |
| 524 | return Tok.is(tok::colon) || // X() : Base() {} (used for ctors) |
| 525 | Tok.is(tok::kw_try); // X() try { ... } |
Douglas Gregor | 1426e53 | 2009-05-12 21:31:51 +0000 | [diff] [blame] | 526 | } |
| 527 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 528 | /// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or |
| 529 | /// a declaration. We can't tell which we have until we read up to the |
Douglas Gregor | c4b4e7b | 2008-12-24 02:52:09 +0000 | [diff] [blame] | 530 | /// compound-statement in function-definition. TemplateParams, if |
| 531 | /// non-NULL, provides the template parameters when we're parsing a |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 532 | /// C++ template-declaration. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 533 | /// |
| 534 | /// function-definition: [C99 6.9.1] |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 535 | /// decl-specs declarator declaration-list[opt] compound-statement |
| 536 | /// [C90] function-definition: [C99 6.7.1] - implicit int result |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 537 | /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 538 | /// |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 539 | /// declaration: [C99 6.7] |
Chris Lattner | 697e15f | 2007-08-22 06:06:56 +0000 | [diff] [blame] | 540 | /// declaration-specifiers init-declarator-list[opt] ';' |
| 541 | /// [!C99] init-declarator-list ';' [TODO: warn in c99 mode] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 542 | /// [OMP] threadprivate-directive [TODO] |
| 543 | /// |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 544 | Parser::DeclGroupPtrTy |
Fariborz Jahanian | 3acd9aa | 2009-12-09 21:39:38 +0000 | [diff] [blame] | 545 | Parser::ParseDeclarationOrFunctionDefinition(ParsingDeclSpec &DS, |
| 546 | AttributeList *Attr, |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 547 | AccessSpecifier AS) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 548 | // Parse the common declaration-specifiers piece. |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 549 | if (Attr) |
| 550 | DS.AddAttributes(Attr); |
| 551 | |
Douglas Gregor | 0efc2c1 | 2010-01-13 17:31:36 +0000 | [diff] [blame] | 552 | ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS, DSC_top_level); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 553 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 554 | // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" |
| 555 | // declaration-specifiers init-declarator-list[opt] ';' |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 556 | if (Tok.is(tok::semi)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 557 | ConsumeToken(); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 558 | DeclPtrTy TheDecl = Actions.ParsedFreeStandingDeclSpec(CurScope, DS); |
John McCall | 54abf7d | 2009-11-04 02:18:39 +0000 | [diff] [blame] | 559 | DS.complete(TheDecl); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 560 | return Actions.ConvertDeclToDeclGroup(TheDecl); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 561 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 562 | |
Daniel Dunbar | 246e70f | 2008-09-26 04:48:09 +0000 | [diff] [blame] | 563 | // ObjC2 allows prefix attributes on class interfaces and protocols. |
| 564 | // FIXME: This still needs better diagnostics. We should only accept |
| 565 | // attributes here, no types, etc. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 566 | if (getLang().ObjC2 && Tok.is(tok::at)) { |
Steve Naroff | dac269b | 2007-08-20 21:31:48 +0000 | [diff] [blame] | 567 | SourceLocation AtLoc = ConsumeToken(); // the "@" |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 568 | if (!Tok.isObjCAtKeyword(tok::objc_interface) && |
Daniel Dunbar | 246e70f | 2008-09-26 04:48:09 +0000 | [diff] [blame] | 569 | !Tok.isObjCAtKeyword(tok::objc_protocol)) { |
| 570 | Diag(Tok, diag::err_objc_unexpected_attr); |
Chris Lattner | cb53b36 | 2007-12-27 19:57:00 +0000 | [diff] [blame] | 571 | SkipUntil(tok::semi); // FIXME: better skip? |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 572 | return DeclGroupPtrTy(); |
Chris Lattner | cb53b36 | 2007-12-27 19:57:00 +0000 | [diff] [blame] | 573 | } |
John McCall | d8ac057 | 2009-11-03 19:26:08 +0000 | [diff] [blame] | 574 | |
John McCall | 54abf7d | 2009-11-04 02:18:39 +0000 | [diff] [blame] | 575 | DS.abort(); |
| 576 | |
Fariborz Jahanian | 0de2ae2 | 2008-01-02 19:17:38 +0000 | [diff] [blame] | 577 | const char *PrevSpec = 0; |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 578 | unsigned DiagID; |
| 579 | if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec, DiagID)) |
| 580 | Diag(AtLoc, DiagID) << PrevSpec; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 581 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 582 | DeclPtrTy TheDecl; |
Daniel Dunbar | 246e70f | 2008-09-26 04:48:09 +0000 | [diff] [blame] | 583 | if (Tok.isObjCAtKeyword(tok::objc_protocol)) |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 584 | TheDecl = ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes()); |
| 585 | else |
| 586 | TheDecl = ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()); |
| 587 | return Actions.ConvertDeclToDeclGroup(TheDecl); |
Steve Naroff | dac269b | 2007-08-20 21:31:48 +0000 | [diff] [blame] | 588 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 589 | |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 590 | // If the declspec consisted only of 'extern' and we have a string |
| 591 | // literal following it, this must be a C++ linkage specifier like |
| 592 | // 'extern "C"'. |
Chris Lattner | 3c6f6a7 | 2008-01-12 07:08:43 +0000 | [diff] [blame] | 593 | if (Tok.is(tok::string_literal) && getLang().CPlusPlus && |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 594 | DS.getStorageClassSpec() == DeclSpec::SCS_extern && |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 595 | DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) { |
Fariborz Jahanian | 3acd9aa | 2009-12-09 21:39:38 +0000 | [diff] [blame] | 596 | DeclPtrTy TheDecl = ParseLinkage(DS, Declarator::FileContext); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 597 | return Actions.ConvertDeclToDeclGroup(TheDecl); |
| 598 | } |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 599 | |
John McCall | d8ac057 | 2009-11-03 19:26:08 +0000 | [diff] [blame] | 600 | return ParseDeclGroup(DS, Declarator::FileContext, true); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 601 | } |
| 602 | |
Fariborz Jahanian | 3acd9aa | 2009-12-09 21:39:38 +0000 | [diff] [blame] | 603 | Parser::DeclGroupPtrTy |
| 604 | Parser::ParseDeclarationOrFunctionDefinition(AttributeList *Attr, |
| 605 | AccessSpecifier AS) { |
| 606 | ParsingDeclSpec DS(*this); |
| 607 | return ParseDeclarationOrFunctionDefinition(DS, Attr, AS); |
| 608 | } |
| 609 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 610 | /// ParseFunctionDefinition - We parsed and verified that the specified |
| 611 | /// Declarator is well formed. If this is a K&R-style function, read the |
| 612 | /// parameters declaration-list, then start the compound-statement. |
| 613 | /// |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 614 | /// function-definition: [C99 6.9.1] |
| 615 | /// decl-specs declarator declaration-list[opt] compound-statement |
| 616 | /// [C90] function-definition: [C99 6.7.1] - implicit int result |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 617 | /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 618 | /// [C++] function-definition: [C++ 8.4] |
Chris Lattner | 23c4b18 | 2009-03-29 17:18:04 +0000 | [diff] [blame] | 619 | /// decl-specifier-seq[opt] declarator ctor-initializer[opt] |
| 620 | /// function-body |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 621 | /// [C++] function-definition: [C++ 8.4] |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 622 | /// decl-specifier-seq[opt] declarator function-try-block |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 623 | /// |
John McCall | 54abf7d | 2009-11-04 02:18:39 +0000 | [diff] [blame] | 624 | Parser::DeclPtrTy Parser::ParseFunctionDefinition(ParsingDeclarator &D, |
Douglas Gregor | 52591bf | 2009-06-24 00:54:41 +0000 | [diff] [blame] | 625 | const ParsedTemplateInfo &TemplateInfo) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 626 | const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0); |
| 627 | assert(FnTypeInfo.Kind == DeclaratorChunk::Function && |
| 628 | "This isn't a function declarator!"); |
| 629 | const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 630 | |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 631 | // If this is C90 and the declspecs were completely missing, fudge in an |
| 632 | // implicit int. We do this here because this is the only place where |
| 633 | // declaration-specifiers are completely optional in the grammar. |
Chris Lattner | 2a327d1 | 2009-02-27 18:35:46 +0000 | [diff] [blame] | 634 | if (getLang().ImplicitInt && D.getDeclSpec().isEmpty()) { |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 635 | const char *PrevSpec; |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 636 | unsigned DiagID; |
Chris Lattner | 31c2868 | 2008-10-20 02:01:34 +0000 | [diff] [blame] | 637 | D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int, |
| 638 | D.getIdentifierLoc(), |
John McCall | fec5401 | 2009-08-03 20:12:06 +0000 | [diff] [blame] | 639 | PrevSpec, DiagID); |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 640 | D.SetRangeBegin(D.getDeclSpec().getSourceRange().getBegin()); |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 641 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 642 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 643 | // If this declaration was formed with a K&R-style identifier list for the |
| 644 | // arguments, parse declarations for all of the args next. |
| 645 | // int foo(a,b) int a; float b; {} |
| 646 | if (!FTI.hasPrototype && FTI.NumArgs != 0) |
| 647 | ParseKNRParamDeclarations(D); |
| 648 | |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 649 | // We should have either an opening brace or, in a C++ constructor, |
| 650 | // we may have a colon. |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 651 | if (Tok.isNot(tok::l_brace) && Tok.isNot(tok::colon) && |
| 652 | Tok.isNot(tok::kw_try)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 653 | Diag(Tok, diag::err_expected_fn_body); |
| 654 | |
| 655 | // Skip over garbage, until we get to '{'. Don't eat the '{'. |
| 656 | SkipUntil(tok::l_brace, true, true); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 657 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 658 | // If we didn't find the '{', bail out. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 659 | if (Tok.isNot(tok::l_brace)) |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 660 | return DeclPtrTy(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 661 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 662 | |
Chris Lattner | b652cea | 2007-10-09 17:14:05 +0000 | [diff] [blame] | 663 | // Enter a scope for the function body. |
Douglas Gregor | 8935b8b | 2008-12-10 06:34:36 +0000 | [diff] [blame] | 664 | ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 665 | |
Chris Lattner | b652cea | 2007-10-09 17:14:05 +0000 | [diff] [blame] | 666 | // Tell the actions module that we have entered a function definition with the |
| 667 | // specified Declarator for the function. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 668 | DeclPtrTy Res = TemplateInfo.TemplateParams? |
Douglas Gregor | 52591bf | 2009-06-24 00:54:41 +0000 | [diff] [blame] | 669 | Actions.ActOnStartOfFunctionTemplateDef(CurScope, |
| 670 | Action::MultiTemplateParamsArg(Actions, |
| 671 | TemplateInfo.TemplateParams->data(), |
| 672 | TemplateInfo.TemplateParams->size()), |
| 673 | D) |
| 674 | : Actions.ActOnStartOfFunctionDef(CurScope, D); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 675 | |
John McCall | 54abf7d | 2009-11-04 02:18:39 +0000 | [diff] [blame] | 676 | // Break out of the ParsingDeclarator context before we parse the body. |
| 677 | D.complete(Res); |
| 678 | |
| 679 | // Break out of the ParsingDeclSpec context, too. This const_cast is |
| 680 | // safe because we're always the sole owner. |
| 681 | D.getMutableDeclSpec().abort(); |
| 682 | |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 683 | if (Tok.is(tok::kw_try)) |
| 684 | return ParseFunctionTryBlock(Res); |
| 685 | |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 686 | // If we have a colon, then we're probably parsing a C++ |
| 687 | // ctor-initializer. |
| 688 | if (Tok.is(tok::colon)) |
| 689 | ParseConstructorInitializer(Res); |
Fariborz Jahanian | 0849d38 | 2009-07-14 20:06:22 +0000 | [diff] [blame] | 690 | else |
Fariborz Jahanian | 393612e | 2009-07-21 22:36:06 +0000 | [diff] [blame] | 691 | Actions.ActOnDefaultCtorInitializers(Res); |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 692 | |
Chris Lattner | 40e9bc8 | 2009-03-05 00:49:17 +0000 | [diff] [blame] | 693 | return ParseFunctionStatementBody(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | /// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides |
| 697 | /// types for a function with a K&R-style identifier list for arguments. |
| 698 | void Parser::ParseKNRParamDeclarations(Declarator &D) { |
| 699 | // We know that the top-level of this declarator is a function. |
| 700 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; |
| 701 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 702 | // Enter function-declaration scope, limiting any declarators to the |
| 703 | // function prototype scope, including parameter declarators. |
Douglas Gregor | 3218c4b | 2009-01-09 22:42:13 +0000 | [diff] [blame] | 704 | ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope|Scope::DeclScope); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 705 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 706 | // Read all the argument declarations. |
| 707 | while (isDeclarationSpecifier()) { |
| 708 | SourceLocation DSStart = Tok.getLocation(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 709 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 710 | // Parse the common declaration-specifiers piece. |
| 711 | DeclSpec DS; |
| 712 | ParseDeclarationSpecifiers(DS); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 713 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 714 | // C99 6.9.1p6: 'each declaration in the declaration list shall have at |
| 715 | // least one declarator'. |
| 716 | // NOTE: GCC just makes this an ext-warn. It's not clear what it does with |
| 717 | // the declarations though. It's trivial to ignore them, really hard to do |
| 718 | // anything else with them. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 719 | if (Tok.is(tok::semi)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 720 | Diag(DSStart, diag::err_declaration_does_not_declare_param); |
| 721 | ConsumeToken(); |
| 722 | continue; |
| 723 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 724 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 725 | // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other |
| 726 | // than register. |
| 727 | if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && |
| 728 | DS.getStorageClassSpec() != DeclSpec::SCS_register) { |
| 729 | Diag(DS.getStorageClassSpecLoc(), |
| 730 | diag::err_invalid_storage_class_in_func_decl); |
| 731 | DS.ClearStorageClassSpecs(); |
| 732 | } |
| 733 | if (DS.isThreadSpecified()) { |
| 734 | Diag(DS.getThreadSpecLoc(), |
| 735 | diag::err_invalid_storage_class_in_func_decl); |
| 736 | DS.ClearStorageClassSpecs(); |
| 737 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 738 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 739 | // Parse the first declarator attached to this declspec. |
| 740 | Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext); |
| 741 | ParseDeclarator(ParmDeclarator); |
| 742 | |
| 743 | // Handle the full declarator list. |
| 744 | while (1) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 745 | // If attributes are present, parse them. |
Ted Kremenek | 1e37765 | 2010-02-11 02:19:13 +0000 | [diff] [blame] | 746 | llvm::OwningPtr<AttributeList> AttrList; |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 747 | if (Tok.is(tok::kw___attribute)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 748 | // FIXME: attach attributes too. |
Ted Kremenek | 1e37765 | 2010-02-11 02:19:13 +0000 | [diff] [blame] | 749 | AttrList.reset(ParseGNUAttributes()); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 750 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 751 | // Ask the actions module to compute the type for this declarator. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 752 | Action::DeclPtrTy Param = |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 753 | Actions.ActOnParamDeclarator(CurScope, ParmDeclarator); |
Steve Naroff | 2bd42fa | 2007-09-10 20:51:04 +0000 | [diff] [blame] | 754 | |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 755 | if (Param && |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 756 | // A missing identifier has already been diagnosed. |
| 757 | ParmDeclarator.getIdentifier()) { |
| 758 | |
| 759 | // Scan the argument list looking for the correct param to apply this |
| 760 | // type. |
| 761 | for (unsigned i = 0; ; ++i) { |
| 762 | // C99 6.9.1p6: those declarators shall declare only identifiers from |
| 763 | // the identifier list. |
| 764 | if (i == FTI.NumArgs) { |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 765 | Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param) |
Chris Lattner | 6898e33 | 2008-11-19 07:51:13 +0000 | [diff] [blame] | 766 | << ParmDeclarator.getIdentifier(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 767 | break; |
| 768 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 769 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 770 | if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) { |
| 771 | // Reject redefinitions of parameters. |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 772 | if (FTI.ArgInfo[i].Param) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 773 | Diag(ParmDeclarator.getIdentifierLoc(), |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 774 | diag::err_param_redefinition) |
Chris Lattner | 6898e33 | 2008-11-19 07:51:13 +0000 | [diff] [blame] | 775 | << ParmDeclarator.getIdentifier(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 776 | } else { |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 777 | FTI.ArgInfo[i].Param = Param; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 778 | } |
| 779 | break; |
| 780 | } |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | // If we don't have a comma, it is either the end of the list (a ';') or |
| 785 | // an error, bail out. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 786 | if (Tok.isNot(tok::comma)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 787 | break; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 788 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 789 | // Consume the comma. |
| 790 | ConsumeToken(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 791 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 792 | // Parse the next declarator. |
| 793 | ParmDeclarator.clear(); |
| 794 | ParseDeclarator(ParmDeclarator); |
| 795 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 796 | |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 797 | if (Tok.is(tok::semi)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 798 | ConsumeToken(); |
| 799 | } else { |
| 800 | Diag(Tok, diag::err_parse_error); |
| 801 | // Skip to end of block or statement |
| 802 | SkipUntil(tok::semi, true); |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 803 | if (Tok.is(tok::semi)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 804 | ConsumeToken(); |
| 805 | } |
| 806 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 807 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 808 | // The actions module must verify that all arguments were declared. |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 809 | Actions.ActOnFinishKNRParamDeclarations(CurScope, D, Tok.getLocation()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 810 | } |
| 811 | |
| 812 | |
| 813 | /// ParseAsmStringLiteral - This is just a normal string-literal, but is not |
| 814 | /// allowed to be a wide string, and is not subject to character translation. |
| 815 | /// |
| 816 | /// [GNU] asm-string-literal: |
| 817 | /// string-literal |
| 818 | /// |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 819 | Parser::OwningExprResult Parser::ParseAsmStringLiteral() { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 820 | if (!isTokenStringLiteral()) { |
| 821 | Diag(Tok, diag::err_expected_string_literal); |
Sebastian Redl | 61364dd | 2008-12-11 19:30:53 +0000 | [diff] [blame] | 822 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 823 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 824 | |
Sebastian Redl | 20df9b7 | 2008-12-11 22:51:44 +0000 | [diff] [blame] | 825 | OwningExprResult Res(ParseStringLiteralExpression()); |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 826 | if (Res.isInvalid()) return move(Res); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 827 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 828 | // TODO: Diagnose: wide string literal in 'asm' |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 829 | |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 830 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 831 | } |
| 832 | |
| 833 | /// ParseSimpleAsm |
| 834 | /// |
| 835 | /// [GNU] simple-asm-expr: |
| 836 | /// 'asm' '(' asm-string-literal ')' |
| 837 | /// |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 838 | Parser::OwningExprResult Parser::ParseSimpleAsm(SourceLocation *EndLoc) { |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 839 | assert(Tok.is(tok::kw_asm) && "Not an asm!"); |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 840 | SourceLocation Loc = ConsumeToken(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 841 | |
John McCall | 7a6ae74 | 2010-01-25 22:27:48 +0000 | [diff] [blame] | 842 | if (Tok.is(tok::kw_volatile)) { |
John McCall | 841d5e6 | 2010-01-25 23:12:50 +0000 | [diff] [blame] | 843 | // Remove from the end of 'asm' to the end of 'volatile'. |
| 844 | SourceRange RemovalRange(PP.getLocForEndOfToken(Loc), |
| 845 | PP.getLocForEndOfToken(Tok.getLocation())); |
| 846 | |
| 847 | Diag(Tok, diag::warn_file_asm_volatile) |
| 848 | << CodeModificationHint::CreateRemoval(RemovalRange); |
John McCall | 7a6ae74 | 2010-01-25 22:27:48 +0000 | [diff] [blame] | 849 | ConsumeToken(); |
| 850 | } |
| 851 | |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 852 | if (Tok.isNot(tok::l_paren)) { |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 853 | Diag(Tok, diag::err_expected_lparen_after) << "asm"; |
Sebastian Redl | 61364dd | 2008-12-11 19:30:53 +0000 | [diff] [blame] | 854 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 855 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 856 | |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 857 | Loc = ConsumeParen(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 858 | |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 859 | OwningExprResult Result(ParseAsmStringLiteral()); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 860 | |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 861 | if (Result.isInvalid()) { |
| 862 | SkipUntil(tok::r_paren, true, true); |
| 863 | if (EndLoc) |
| 864 | *EndLoc = Tok.getLocation(); |
| 865 | ConsumeAnyToken(); |
| 866 | } else { |
| 867 | Loc = MatchRHSPunctuation(tok::r_paren, Loc); |
| 868 | if (EndLoc) |
| 869 | *EndLoc = Loc; |
| 870 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 871 | |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 872 | return move(Result); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 873 | } |
| 874 | |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 875 | /// TryAnnotateTypeOrScopeToken - If the current token position is on a |
| 876 | /// typename (possibly qualified in C++) or a C++ scope specifier not followed |
| 877 | /// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens |
| 878 | /// with a single annotation token representing the typename or C++ scope |
| 879 | /// respectively. |
| 880 | /// This simplifies handling of C++ scope specifiers and allows efficient |
| 881 | /// backtracking without the need to re-parse and resolve nested-names and |
| 882 | /// typenames. |
Argyrios Kyrtzidis | 44802cc | 2008-11-26 21:51:07 +0000 | [diff] [blame] | 883 | /// It will mainly be called when we expect to treat identifiers as typenames |
| 884 | /// (if they are typenames). For example, in C we do not expect identifiers |
| 885 | /// inside expressions to be treated as typenames so it will not be called |
| 886 | /// for expressions in C. |
| 887 | /// The benefit for C/ObjC is that a typename will be annotated and |
Steve Naroff | b43a50f | 2009-01-28 19:39:02 +0000 | [diff] [blame] | 888 | /// Actions.getTypeName will not be needed to be called again (e.g. getTypeName |
Argyrios Kyrtzidis | 44802cc | 2008-11-26 21:51:07 +0000 | [diff] [blame] | 889 | /// will not be called twice, once to check whether we have a declaration |
| 890 | /// specifier, and another one to get the actual type inside |
| 891 | /// ParseDeclarationSpecifiers). |
Chris Lattner | a7bc7c8 | 2009-01-04 23:23:14 +0000 | [diff] [blame] | 892 | /// |
Chris Lattner | c8e27cc | 2009-06-26 04:27:47 +0000 | [diff] [blame] | 893 | /// This returns true if the token was annotated or an unrecoverable error |
| 894 | /// occurs. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 895 | /// |
Chris Lattner | 55a7cef | 2009-01-05 00:13:00 +0000 | [diff] [blame] | 896 | /// Note that this routine emits an error if you call it with ::new or ::delete |
| 897 | /// as the current tokens, so only call it in contexts where these are invalid. |
Douglas Gregor | 495c35d | 2009-08-25 22:51:20 +0000 | [diff] [blame] | 898 | bool Parser::TryAnnotateTypeOrScopeToken(bool EnteringContext) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 899 | assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) |
John McCall | ae03cb5 | 2009-12-19 00:35:18 +0000 | [diff] [blame] | 900 | || Tok.is(tok::kw_typename) || Tok.is(tok::annot_cxxscope)) && |
Chris Lattner | 7452c6f | 2009-01-05 01:24:05 +0000 | [diff] [blame] | 901 | "Cannot be a type or scope token!"); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 902 | |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 903 | if (Tok.is(tok::kw_typename)) { |
| 904 | // Parse a C++ typename-specifier, e.g., "typename T::type". |
| 905 | // |
| 906 | // typename-specifier: |
| 907 | // 'typename' '::' [opt] nested-name-specifier identifier |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 908 | // 'typename' '::' [opt] nested-name-specifier template [opt] |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 909 | // simple-template-id |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 910 | SourceLocation TypenameLoc = ConsumeToken(); |
| 911 | CXXScopeSpec SS; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 912 | bool HadNestedNameSpecifier |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 913 | = ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false); |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 914 | if (!HadNestedNameSpecifier) { |
| 915 | Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename); |
| 916 | return false; |
| 917 | } |
| 918 | |
| 919 | TypeResult Ty; |
| 920 | if (Tok.is(tok::identifier)) { |
| 921 | // FIXME: check whether the next token is '<', first! |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 922 | Ty = Actions.ActOnTypenameType(TypenameLoc, SS, *Tok.getIdentifierInfo(), |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 923 | Tok.getLocation()); |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 924 | } else if (Tok.is(tok::annot_template_id)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 925 | TemplateIdAnnotation *TemplateId |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 926 | = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); |
| 927 | if (TemplateId->Kind == TNK_Function_template) { |
| 928 | Diag(Tok, diag::err_typename_refers_to_non_type_template) |
| 929 | << Tok.getAnnotationRange(); |
| 930 | return false; |
| 931 | } |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 932 | |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 933 | AnnotateTemplateIdTokenAsType(0); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 934 | assert(Tok.is(tok::annot_typename) && |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 935 | "AnnotateTemplateIdTokenAsType isn't working properly"); |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 936 | if (Tok.getAnnotationValue()) |
| 937 | Ty = Actions.ActOnTypenameType(TypenameLoc, SS, SourceLocation(), |
| 938 | Tok.getAnnotationValue()); |
| 939 | else |
| 940 | Ty = true; |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 941 | } else { |
| 942 | Diag(Tok, diag::err_expected_type_name_after_typename) |
| 943 | << SS.getRange(); |
| 944 | return false; |
| 945 | } |
| 946 | |
Sebastian Redl | 39d6711 | 2010-02-08 19:35:18 +0000 | [diff] [blame] | 947 | SourceLocation EndLoc = Tok.getLastLoc(); |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 948 | Tok.setKind(tok::annot_typename); |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 949 | Tok.setAnnotationValue(Ty.isInvalid()? 0 : Ty.get()); |
Sebastian Redl | 39d6711 | 2010-02-08 19:35:18 +0000 | [diff] [blame] | 950 | Tok.setAnnotationEndLoc(EndLoc); |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 951 | Tok.setLocation(TypenameLoc); |
| 952 | PP.AnnotateCachedTokens(Tok); |
| 953 | return true; |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 954 | } |
| 955 | |
John McCall | ae03cb5 | 2009-12-19 00:35:18 +0000 | [diff] [blame] | 956 | // Remembers whether the token was originally a scope annotation. |
| 957 | bool wasScopeAnnotation = Tok.is(tok::annot_cxxscope); |
| 958 | |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 959 | CXXScopeSpec SS; |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame] | 960 | if (getLang().CPlusPlus) |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 961 | ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, EnteringContext); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 962 | |
| 963 | if (Tok.is(tok::identifier)) { |
Chris Lattner | 608d1fc | 2009-01-05 01:49:50 +0000 | [diff] [blame] | 964 | // Determine whether the identifier is a type name. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 965 | if (TypeTy *Ty = Actions.getTypeName(*Tok.getIdentifierInfo(), |
Douglas Gregor | b696ea3 | 2009-02-04 17:00:24 +0000 | [diff] [blame] | 966 | Tok.getLocation(), CurScope, &SS)) { |
Chris Lattner | 608d1fc | 2009-01-05 01:49:50 +0000 | [diff] [blame] | 967 | // This is a typename. Replace the current token in-place with an |
| 968 | // annotation type token. |
Chris Lattner | b31757b | 2009-01-06 05:06:21 +0000 | [diff] [blame] | 969 | Tok.setKind(tok::annot_typename); |
Chris Lattner | 608d1fc | 2009-01-05 01:49:50 +0000 | [diff] [blame] | 970 | Tok.setAnnotationValue(Ty); |
| 971 | Tok.setAnnotationEndLoc(Tok.getLocation()); |
| 972 | if (SS.isNotEmpty()) // it was a C++ qualified type name. |
| 973 | Tok.setLocation(SS.getBeginLoc()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 974 | |
Chris Lattner | 608d1fc | 2009-01-05 01:49:50 +0000 | [diff] [blame] | 975 | // In case the tokens were cached, have Preprocessor replace |
| 976 | // them with the annotation token. |
| 977 | PP.AnnotateCachedTokens(Tok); |
| 978 | return true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 979 | } |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 980 | |
| 981 | if (!getLang().CPlusPlus) { |
Chris Lattner | 608d1fc | 2009-01-05 01:49:50 +0000 | [diff] [blame] | 982 | // If we're in C, we can't have :: tokens at all (the lexer won't return |
| 983 | // them). If the identifier is not a type, then it can't be scope either, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 984 | // just early exit. |
Chris Lattner | 608d1fc | 2009-01-05 01:49:50 +0000 | [diff] [blame] | 985 | return false; |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 986 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 987 | |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 988 | // If this is a template-id, annotate with a template-id or type token. |
Douglas Gregor | 55f6b14 | 2009-02-09 18:46:07 +0000 | [diff] [blame] | 989 | if (NextToken().is(tok::less)) { |
Douglas Gregor | 7532dc6 | 2009-03-30 22:58:21 +0000 | [diff] [blame] | 990 | TemplateTy Template; |
Douglas Gregor | 014e88d | 2009-11-03 23:16:33 +0000 | [diff] [blame] | 991 | UnqualifiedId TemplateName; |
| 992 | TemplateName.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 993 | if (TemplateNameKind TNK |
Douglas Gregor | 014e88d | 2009-11-03 23:16:33 +0000 | [diff] [blame] | 994 | = Actions.isTemplateName(CurScope, SS, TemplateName, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 995 | /*ObjectType=*/0, EnteringContext, |
Douglas Gregor | ca1bdd7 | 2009-11-04 00:56:37 +0000 | [diff] [blame] | 996 | Template)) { |
| 997 | // Consume the identifier. |
| 998 | ConsumeToken(); |
| 999 | if (AnnotateTemplateIdToken(Template, TNK, &SS, TemplateName)) { |
Chris Lattner | c8e27cc | 2009-06-26 04:27:47 +0000 | [diff] [blame] | 1000 | // If an unrecoverable error occurred, we need to return true here, |
| 1001 | // because the token stream is in a damaged state. We may not return |
| 1002 | // a valid identifier. |
| 1003 | return Tok.isNot(tok::identifier); |
| 1004 | } |
Douglas Gregor | ca1bdd7 | 2009-11-04 00:56:37 +0000 | [diff] [blame] | 1005 | } |
Douglas Gregor | 55f6b14 | 2009-02-09 18:46:07 +0000 | [diff] [blame] | 1006 | } |
Douglas Gregor | d6fb7ef | 2008-12-18 19:37:40 +0000 | [diff] [blame] | 1007 | |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 1008 | // The current token, which is either an identifier or a |
| 1009 | // template-id, is not part of the annotation. Fall through to |
| 1010 | // push that token back into the stream and complete the C++ scope |
| 1011 | // specifier annotation. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1012 | } |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 1013 | |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 1014 | if (Tok.is(tok::annot_template_id)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1015 | TemplateIdAnnotation *TemplateId |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 1016 | = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); |
Douglas Gregor | c45c232 | 2009-03-31 00:43:58 +0000 | [diff] [blame] | 1017 | if (TemplateId->Kind == TNK_Type_template) { |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 1018 | // A template-id that refers to a type was parsed into a |
| 1019 | // template-id annotation in a context where we weren't allowed |
| 1020 | // to produce a type annotation token. Update the template-id |
| 1021 | // annotation token to a type annotation token now. |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 1022 | AnnotateTemplateIdTokenAsType(&SS); |
| 1023 | return true; |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 1024 | } |
| 1025 | } |
Douglas Gregor | d6fb7ef | 2008-12-18 19:37:40 +0000 | [diff] [blame] | 1026 | |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 1027 | if (SS.isEmpty()) |
Eli Friedman | 3c9028a | 2009-06-27 08:17:02 +0000 | [diff] [blame] | 1028 | return Tok.isNot(tok::identifier) && Tok.isNot(tok::coloncolon); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1029 | |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 1030 | // A C++ scope specifier that isn't followed by a typename. |
| 1031 | // Push the current token back into the token stream (or revert it if it is |
| 1032 | // cached) and use an annotation scope token for current token. |
| 1033 | if (PP.isBacktrackEnabled()) |
| 1034 | PP.RevertCachedTokens(1); |
| 1035 | else |
| 1036 | PP.EnterToken(Tok); |
| 1037 | Tok.setKind(tok::annot_cxxscope); |
Douglas Gregor | 3507369 | 2009-03-26 23:56:24 +0000 | [diff] [blame] | 1038 | Tok.setAnnotationValue(SS.getScopeRep()); |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 1039 | Tok.setAnnotationRange(SS.getRange()); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 1040 | |
John McCall | ae03cb5 | 2009-12-19 00:35:18 +0000 | [diff] [blame] | 1041 | // In case the tokens were cached, have Preprocessor replace them |
| 1042 | // with the annotation token. We don't need to do this if we've |
| 1043 | // just reverted back to the state we were in before being called. |
| 1044 | if (!wasScopeAnnotation) |
| 1045 | PP.AnnotateCachedTokens(Tok); |
Chris Lattner | a7bc7c8 | 2009-01-04 23:23:14 +0000 | [diff] [blame] | 1046 | return true; |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 1047 | } |
| 1048 | |
| 1049 | /// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 1050 | /// annotates C++ scope specifiers and template-ids. This returns |
Chris Lattner | c8e27cc | 2009-06-26 04:27:47 +0000 | [diff] [blame] | 1051 | /// true if the token was annotated or there was an error that could not be |
| 1052 | /// recovered from. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1053 | /// |
Chris Lattner | 55a7cef | 2009-01-05 00:13:00 +0000 | [diff] [blame] | 1054 | /// Note that this routine emits an error if you call it with ::new or ::delete |
| 1055 | /// as the current tokens, so only call it in contexts where these are invalid. |
Douglas Gregor | 495c35d | 2009-08-25 22:51:20 +0000 | [diff] [blame] | 1056 | bool Parser::TryAnnotateCXXScopeToken(bool EnteringContext) { |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame] | 1057 | assert(getLang().CPlusPlus && |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 1058 | "Call sites of this function should be guarded by checking for C++"); |
Chris Lattner | 7452c6f | 2009-01-05 01:24:05 +0000 | [diff] [blame] | 1059 | assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && |
| 1060 | "Cannot be a type or scope token!"); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 1061 | |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame] | 1062 | CXXScopeSpec SS; |
Douglas Gregor | 2dd078a | 2009-09-02 22:59:36 +0000 | [diff] [blame] | 1063 | if (!ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, EnteringContext)) |
Chris Lattner | bd87c0b | 2009-12-07 00:48:47 +0000 | [diff] [blame] | 1064 | // If the token left behind is not an identifier, we either had an error or |
| 1065 | // successfully turned it into an annotation token. |
| 1066 | return Tok.isNot(tok::identifier); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 1067 | |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 1068 | // Push the current token back into the token stream (or revert it if it is |
| 1069 | // cached) and use an annotation scope token for current token. |
| 1070 | if (PP.isBacktrackEnabled()) |
| 1071 | PP.RevertCachedTokens(1); |
| 1072 | else |
| 1073 | PP.EnterToken(Tok); |
| 1074 | Tok.setKind(tok::annot_cxxscope); |
Douglas Gregor | 3507369 | 2009-03-26 23:56:24 +0000 | [diff] [blame] | 1075 | Tok.setAnnotationValue(SS.getScopeRep()); |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 1076 | Tok.setAnnotationRange(SS.getRange()); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 1077 | |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 1078 | // In case the tokens were cached, have Preprocessor replace them with the |
| 1079 | // annotation token. |
| 1080 | PP.AnnotateCachedTokens(Tok); |
Chris Lattner | 5e02c47 | 2009-01-05 00:07:25 +0000 | [diff] [blame] | 1081 | return true; |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 1082 | } |
John McCall | 6c94a6d | 2009-11-03 19:33:12 +0000 | [diff] [blame] | 1083 | |
| 1084 | // Anchor the Parser::FieldCallback vtable to this translation unit. |
| 1085 | // We use a spurious method instead of the destructor because |
| 1086 | // destroying FieldCallbacks can actually be slightly |
| 1087 | // performance-sensitive. |
| 1088 | void Parser::FieldCallback::_anchor() { |
| 1089 | } |