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" |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 18 | #include "llvm/Support/raw_ostream.h" |
Chris Lattner | c46d1a1 | 2008-10-20 06:45:43 +0000 | [diff] [blame] | 19 | #include "ExtensionRAIIObject.h" |
Daniel Dunbar | fcdd8fe | 2008-10-04 19:21:03 +0000 | [diff] [blame] | 20 | #include "ParsePragma.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 21 | using namespace clang; |
| 22 | |
| 23 | Parser::Parser(Preprocessor &pp, Action &actions) |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 24 | : CrashInfo(*this), PP(pp), Actions(actions), Diags(PP.getDiagnostics()), |
Douglas Gregor | 55f6b14 | 2009-02-09 18:46:07 +0000 | [diff] [blame] | 25 | GreaterThanIsOperator(true) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 26 | Tok.setKind(tok::eof); |
| 27 | CurScope = 0; |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 28 | NumCachedScopes = 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 29 | ParenCount = BracketCount = BraceCount = 0; |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 30 | ObjCImpDecl = DeclPtrTy(); |
Daniel Dunbar | fcdd8fe | 2008-10-04 19:21:03 +0000 | [diff] [blame] | 31 | |
| 32 | // Add #pragma handlers. These are removed and destroyed in the |
| 33 | // destructor. |
Ted Kremenek | 4726d03 | 2009-03-23 22:28:25 +0000 | [diff] [blame] | 34 | PackHandler.reset(new |
| 35 | PragmaPackHandler(&PP.getIdentifierTable().get("pack"), actions)); |
| 36 | PP.AddPragmaHandler(0, PackHandler.get()); |
| 37 | |
| 38 | UnusedHandler.reset(new |
| 39 | PragmaUnusedHandler(&PP.getIdentifierTable().get("unused"), actions, |
| 40 | *this)); |
| 41 | PP.AddPragmaHandler(0, UnusedHandler.get()); |
Eli Friedman | 9991479 | 2009-06-05 00:49:58 +0000 | [diff] [blame] | 42 | |
| 43 | WeakHandler.reset(new |
| 44 | PragmaWeakHandler(&PP.getIdentifierTable().get("weak"), actions)); |
| 45 | PP.AddPragmaHandler(0, WeakHandler.get()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 46 | } |
| 47 | |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 48 | /// If a crash happens while the parser is active, print out a line indicating |
| 49 | /// what the current token is. |
| 50 | void PrettyStackTraceParserEntry::print(llvm::raw_ostream &OS) const { |
| 51 | const Token &Tok = P.getCurToken(); |
Chris Lattner | ddcbc0a | 2009-03-05 07:27:50 +0000 | [diff] [blame] | 52 | if (Tok.is(tok::eof)) { |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 53 | OS << "<eof> parser at end of file\n"; |
| 54 | return; |
| 55 | } |
| 56 | |
Chris Lattner | ddcbc0a | 2009-03-05 07:27:50 +0000 | [diff] [blame] | 57 | if (Tok.getLocation().isInvalid()) { |
| 58 | OS << "<unknown> parser at unknown location\n"; |
| 59 | return; |
| 60 | } |
| 61 | |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 62 | const Preprocessor &PP = P.getPreprocessor(); |
| 63 | Tok.getLocation().print(OS, PP.getSourceManager()); |
| 64 | OS << ": current parser token '" << PP.getSpelling(Tok) << "'\n"; |
Douglas Gregor | f780abc | 2008-12-30 03:27:21 +0000 | [diff] [blame] | 65 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 66 | |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 67 | |
Chris Lattner | 3cbfe2c | 2008-11-22 00:59:29 +0000 | [diff] [blame] | 68 | DiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) { |
Chris Lattner | 0102c30 | 2009-03-05 07:24:28 +0000 | [diff] [blame] | 69 | return Diags.Report(FullSourceLoc(Loc, PP.getSourceManager()), DiagID); |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 70 | } |
| 71 | |
Chris Lattner | 3cbfe2c | 2008-11-22 00:59:29 +0000 | [diff] [blame] | 72 | DiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) { |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 73 | return Diag(Tok.getLocation(), DiagID); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 74 | } |
| 75 | |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 76 | /// \brief Emits a diagnostic suggesting parentheses surrounding a |
| 77 | /// given range. |
| 78 | /// |
| 79 | /// \param Loc The location where we'll emit the diagnostic. |
| 80 | /// \param Loc The kind of diagnostic to emit. |
| 81 | /// \param ParenRange Source range enclosing code that should be parenthesized. |
| 82 | void Parser::SuggestParentheses(SourceLocation Loc, unsigned DK, |
| 83 | SourceRange ParenRange) { |
Douglas Gregor | b2fb6de | 2009-02-27 17:53:17 +0000 | [diff] [blame] | 84 | SourceLocation EndLoc = PP.getLocForEndOfToken(ParenRange.getEnd()); |
| 85 | if (!ParenRange.getEnd().isFileID() || EndLoc.isInvalid()) { |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 86 | // We can't display the parentheses, so just dig the |
| 87 | // warning/error and return. |
| 88 | Diag(Loc, DK); |
| 89 | return; |
| 90 | } |
| 91 | |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 92 | Diag(Loc, DK) |
Douglas Gregor | b2fb6de | 2009-02-27 17:53:17 +0000 | [diff] [blame] | 93 | << CodeModificationHint::CreateInsertion(ParenRange.getBegin(), "(") |
| 94 | << CodeModificationHint::CreateInsertion(EndLoc, ")"); |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 95 | } |
| 96 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 97 | /// MatchRHSPunctuation - For punctuation with a LHS and RHS (e.g. '['/']'), |
| 98 | /// this helper function matches and consumes the specified RHS token if |
| 99 | /// present. If not present, it emits the specified diagnostic indicating |
| 100 | /// that the parser failed to match the RHS of the token at LHSLoc. LHSName |
| 101 | /// should be the name of the unmatched LHS token. |
| 102 | SourceLocation Parser::MatchRHSPunctuation(tok::TokenKind RHSTok, |
| 103 | SourceLocation LHSLoc) { |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 104 | |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 105 | if (Tok.is(RHSTok)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 106 | return ConsumeAnyToken(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 107 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 108 | SourceLocation R = Tok.getLocation(); |
| 109 | const char *LHSName = "unknown"; |
| 110 | diag::kind DID = diag::err_parse_error; |
| 111 | switch (RHSTok) { |
| 112 | default: break; |
| 113 | case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break; |
| 114 | case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break; |
| 115 | case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break; |
| 116 | case tok::greater: LHSName = "<"; DID = diag::err_expected_greater; break; |
| 117 | } |
| 118 | Diag(Tok, DID); |
Chris Lattner | 28eb7e9 | 2008-11-23 23:17:07 +0000 | [diff] [blame] | 119 | Diag(LHSLoc, diag::note_matching) << LHSName; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 120 | SkipUntil(RHSTok); |
| 121 | return R; |
| 122 | } |
| 123 | |
| 124 | /// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the |
| 125 | /// input. If so, it is consumed and false is returned. |
| 126 | /// |
| 127 | /// If the input is malformed, this emits the specified diagnostic. Next, if |
| 128 | /// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is |
| 129 | /// returned. |
| 130 | bool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID, |
| 131 | const char *Msg, tok::TokenKind SkipToTok) { |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 132 | if (Tok.is(ExpectedTok)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 133 | ConsumeAnyToken(); |
| 134 | return false; |
| 135 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 136 | |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 137 | const char *Spelling = 0; |
Douglas Gregor | b2fb6de | 2009-02-27 17:53:17 +0000 | [diff] [blame] | 138 | SourceLocation EndLoc = PP.getLocForEndOfToken(PrevTokLocation); |
| 139 | if (EndLoc.isValid() && |
| 140 | (Spelling = tok::getTokenSimpleSpelling(ExpectedTok))) { |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 141 | // Show what code to insert to fix this problem. |
Douglas Gregor | b2fb6de | 2009-02-27 17:53:17 +0000 | [diff] [blame] | 142 | Diag(EndLoc, DiagID) |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 143 | << Msg |
Douglas Gregor | b2fb6de | 2009-02-27 17:53:17 +0000 | [diff] [blame] | 144 | << CodeModificationHint::CreateInsertion(EndLoc, Spelling); |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 145 | } else |
| 146 | Diag(Tok, DiagID) << Msg; |
| 147 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 148 | if (SkipToTok != tok::unknown) |
| 149 | SkipUntil(SkipToTok); |
| 150 | return true; |
| 151 | } |
| 152 | |
| 153 | //===----------------------------------------------------------------------===// |
| 154 | // Error recovery. |
| 155 | //===----------------------------------------------------------------------===// |
| 156 | |
| 157 | /// SkipUntil - Read tokens until we get to the specified token, then consume |
Chris Lattner | 012cf46 | 2007-07-24 17:03:04 +0000 | [diff] [blame] | 158 | /// it (unless DontConsume is true). Because we cannot guarantee that the |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 159 | /// token will ever occur, this skips to the next token, or to some likely |
| 160 | /// good stopping point. If StopAtSemi is true, skipping will stop at a ';' |
| 161 | /// character. |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 162 | /// |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 163 | /// If SkipUntil finds the specified token, it returns true, otherwise it |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 164 | /// returns false. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 165 | bool Parser::SkipUntil(const tok::TokenKind *Toks, unsigned NumToks, |
| 166 | bool StopAtSemi, bool DontConsume) { |
| 167 | // We always want this function to skip at least one token if the first token |
| 168 | // isn't T and if not at EOF. |
| 169 | bool isFirstTokenSkipped = true; |
| 170 | while (1) { |
| 171 | // If we found one of the tokens, stop and return true. |
| 172 | for (unsigned i = 0; i != NumToks; ++i) { |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 173 | if (Tok.is(Toks[i])) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 174 | if (DontConsume) { |
| 175 | // Noop, don't consume the token. |
| 176 | } else { |
| 177 | ConsumeAnyToken(); |
| 178 | } |
| 179 | return true; |
| 180 | } |
| 181 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 182 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 183 | switch (Tok.getKind()) { |
| 184 | case tok::eof: |
| 185 | // Ran out of tokens. |
| 186 | return false; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 187 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 188 | case tok::l_paren: |
| 189 | // Recursively skip properly-nested parens. |
| 190 | ConsumeParen(); |
| 191 | SkipUntil(tok::r_paren, false); |
| 192 | break; |
| 193 | case tok::l_square: |
| 194 | // Recursively skip properly-nested square brackets. |
| 195 | ConsumeBracket(); |
| 196 | SkipUntil(tok::r_square, false); |
| 197 | break; |
| 198 | case tok::l_brace: |
| 199 | // Recursively skip properly-nested braces. |
| 200 | ConsumeBrace(); |
| 201 | SkipUntil(tok::r_brace, false); |
| 202 | break; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 203 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 204 | // Okay, we found a ']' or '}' or ')', which we think should be balanced. |
| 205 | // Since the user wasn't looking for this token (if they were, it would |
| 206 | // already be handled), this isn't balanced. If there is a LHS token at a |
| 207 | // higher level, we will assume that this matches the unbalanced token |
| 208 | // and return it. Otherwise, this is a spurious RHS token, which we skip. |
| 209 | case tok::r_paren: |
| 210 | if (ParenCount && !isFirstTokenSkipped) |
| 211 | return false; // Matches something. |
| 212 | ConsumeParen(); |
| 213 | break; |
| 214 | case tok::r_square: |
| 215 | if (BracketCount && !isFirstTokenSkipped) |
| 216 | return false; // Matches something. |
| 217 | ConsumeBracket(); |
| 218 | break; |
| 219 | case tok::r_brace: |
| 220 | if (BraceCount && !isFirstTokenSkipped) |
| 221 | return false; // Matches something. |
| 222 | ConsumeBrace(); |
| 223 | break; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 224 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 225 | case tok::string_literal: |
| 226 | case tok::wide_string_literal: |
| 227 | ConsumeStringToken(); |
| 228 | break; |
| 229 | case tok::semi: |
| 230 | if (StopAtSemi) |
| 231 | return false; |
| 232 | // FALL THROUGH. |
| 233 | default: |
| 234 | // Skip this token. |
| 235 | ConsumeToken(); |
| 236 | break; |
| 237 | } |
| 238 | isFirstTokenSkipped = false; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 239 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | //===----------------------------------------------------------------------===// |
| 243 | // Scope manipulation |
| 244 | //===----------------------------------------------------------------------===// |
| 245 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 246 | /// EnterScope - Start a new scope. |
| 247 | void Parser::EnterScope(unsigned ScopeFlags) { |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 248 | if (NumCachedScopes) { |
| 249 | Scope *N = ScopeCache[--NumCachedScopes]; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 250 | N->Init(CurScope, ScopeFlags); |
| 251 | CurScope = N; |
| 252 | } else { |
| 253 | CurScope = new Scope(CurScope, ScopeFlags); |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | /// ExitScope - Pop a scope off the scope stack. |
| 258 | void Parser::ExitScope() { |
| 259 | assert(CurScope && "Scope imbalance!"); |
| 260 | |
Chris Lattner | 90ae68a | 2007-10-09 20:37:18 +0000 | [diff] [blame] | 261 | // Inform the actions module that this scope is going away if there are any |
| 262 | // decls in it. |
| 263 | if (!CurScope->decl_empty()) |
Steve Naroff | b216c88 | 2007-10-09 22:01:59 +0000 | [diff] [blame] | 264 | Actions.ActOnPopScope(Tok.getLocation(), CurScope); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 265 | |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 266 | Scope *OldScope = CurScope; |
| 267 | CurScope = OldScope->getParent(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 268 | |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 269 | if (NumCachedScopes == ScopeCacheSize) |
| 270 | delete OldScope; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 271 | else |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 272 | ScopeCache[NumCachedScopes++] = OldScope; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | |
| 276 | |
| 277 | |
| 278 | //===----------------------------------------------------------------------===// |
| 279 | // C99 6.9: External Definitions. |
| 280 | //===----------------------------------------------------------------------===// |
| 281 | |
| 282 | Parser::~Parser() { |
| 283 | // If we still have scopes active, delete the scope tree. |
| 284 | delete CurScope; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 285 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 286 | // Free the scope cache. |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 287 | for (unsigned i = 0, e = NumCachedScopes; i != e; ++i) |
| 288 | delete ScopeCache[i]; |
Daniel Dunbar | fcdd8fe | 2008-10-04 19:21:03 +0000 | [diff] [blame] | 289 | |
| 290 | // Remove the pragma handlers we installed. |
Ted Kremenek | 4726d03 | 2009-03-23 22:28:25 +0000 | [diff] [blame] | 291 | PP.RemovePragmaHandler(0, PackHandler.get()); |
| 292 | PackHandler.reset(); |
| 293 | PP.RemovePragmaHandler(0, UnusedHandler.get()); |
| 294 | UnusedHandler.reset(); |
Eli Friedman | 9991479 | 2009-06-05 00:49:58 +0000 | [diff] [blame] | 295 | PP.RemovePragmaHandler(0, WeakHandler.get()); |
| 296 | WeakHandler.reset(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | /// Initialize - Warm up the parser. |
| 300 | /// |
| 301 | void Parser::Initialize() { |
| 302 | // Prime the lexer look-ahead. |
| 303 | ConsumeToken(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 304 | |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 305 | // Create the translation unit scope. Install it as the current scope. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 306 | assert(CurScope == 0 && "A scope is already active?"); |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 307 | EnterScope(Scope::DeclScope); |
Steve Naroff | b216c88 | 2007-10-09 22:01:59 +0000 | [diff] [blame] | 308 | Actions.ActOnTranslationUnitScope(Tok.getLocation(), CurScope); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 309 | |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 310 | if (Tok.is(tok::eof) && |
Chris Lattner | f726175 | 2007-08-25 05:47:03 +0000 | [diff] [blame] | 311 | !getLang().CPlusPlus) // Empty source file is an extension in C |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 312 | Diag(Tok, diag::ext_empty_source_file); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 313 | |
Chris Lattner | 34870da | 2007-08-29 22:54:08 +0000 | [diff] [blame] | 314 | // Initialization for Objective-C context sensitive keywords recognition. |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 315 | // Referenced in Parser::ParseObjCTypeQualifierList. |
Chris Lattner | 34870da | 2007-08-29 22:54:08 +0000 | [diff] [blame] | 316 | if (getLang().ObjC1) { |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 317 | ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in"); |
| 318 | ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out"); |
| 319 | ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout"); |
| 320 | ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway"); |
| 321 | ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy"); |
| 322 | ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref"); |
Chris Lattner | 34870da | 2007-08-29 22:54:08 +0000 | [diff] [blame] | 323 | } |
Daniel Dunbar | 662e8b5 | 2008-08-14 22:04:54 +0000 | [diff] [blame] | 324 | |
| 325 | Ident_super = &PP.getIdentifierTable().get("super"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | /// ParseTopLevelDecl - Parse one top-level declaration, return whatever the |
| 329 | /// action tells us to. This returns true if the EOF was encountered. |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 330 | bool Parser::ParseTopLevelDecl(DeclGroupPtrTy &Result) { |
| 331 | Result = DeclGroupPtrTy(); |
Chris Lattner | 9299f3f | 2008-08-23 03:19:52 +0000 | [diff] [blame] | 332 | if (Tok.is(tok::eof)) { |
| 333 | Actions.ActOnEndOfTranslationUnit(); |
| 334 | return true; |
| 335 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 336 | |
Steve Naroff | 89307ff | 2007-11-29 23:05:20 +0000 | [diff] [blame] | 337 | Result = ParseExternalDeclaration(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 338 | return false; |
| 339 | } |
| 340 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 341 | /// ParseTranslationUnit: |
| 342 | /// translation-unit: [C99 6.9] |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 343 | /// external-declaration |
| 344 | /// translation-unit external-declaration |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 345 | void Parser::ParseTranslationUnit() { |
Douglas Gregor | 8935b8b | 2008-12-10 06:34:36 +0000 | [diff] [blame] | 346 | Initialize(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 347 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 348 | DeclGroupPtrTy Res; |
Steve Naroff | 89307ff | 2007-11-29 23:05:20 +0000 | [diff] [blame] | 349 | while (!ParseTopLevelDecl(Res)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 350 | /*parse them all*/; |
Chris Lattner | 06f5485 | 2008-08-23 02:00:52 +0000 | [diff] [blame] | 351 | |
| 352 | ExitScope(); |
| 353 | assert(CurScope == 0 && "Scope imbalance!"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | /// ParseExternalDeclaration: |
Chris Lattner | 90b93d6 | 2008-12-08 21:59:01 +0000 | [diff] [blame] | 357 | /// |
Douglas Gregor | c19923d | 2008-11-21 16:10:08 +0000 | [diff] [blame] | 358 | /// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl] |
Chris Lattner | c301815 | 2007-08-10 20:57:02 +0000 | [diff] [blame] | 359 | /// function-definition |
| 360 | /// declaration |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 361 | /// [EXT] ';' |
| 362 | /// [GNU] asm-definition |
Chris Lattner | c301815 | 2007-08-10 20:57:02 +0000 | [diff] [blame] | 363 | /// [GNU] __extension__ external-declaration |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 364 | /// [OBJC] objc-class-definition |
| 365 | /// [OBJC] objc-class-declaration |
| 366 | /// [OBJC] objc-alias-declaration |
| 367 | /// [OBJC] objc-protocol-definition |
| 368 | /// [OBJC] objc-method-definition |
| 369 | /// [OBJC] @end |
Douglas Gregor | c19923d | 2008-11-21 16:10:08 +0000 | [diff] [blame] | 370 | /// [C++] linkage-specification |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 371 | /// [GNU] asm-definition: |
| 372 | /// simple-asm-expr ';' |
| 373 | /// |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 374 | Parser::DeclGroupPtrTy Parser::ParseExternalDeclaration() { |
| 375 | DeclPtrTy SingleDecl; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 376 | switch (Tok.getKind()) { |
| 377 | case tok::semi: |
Douglas Gregor | 9b3064b | 2009-04-01 22:41:11 +0000 | [diff] [blame] | 378 | Diag(Tok, diag::ext_top_level_semi) |
| 379 | << CodeModificationHint::CreateRemoval(SourceRange(Tok.getLocation())); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 380 | ConsumeToken(); |
| 381 | // TODO: Invoke action for top-level semicolon. |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 382 | return DeclGroupPtrTy(); |
Chris Lattner | 90b93d6 | 2008-12-08 21:59:01 +0000 | [diff] [blame] | 383 | case tok::r_brace: |
| 384 | Diag(Tok, diag::err_expected_external_declaration); |
| 385 | ConsumeBrace(); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 386 | return DeclGroupPtrTy(); |
Chris Lattner | 90b93d6 | 2008-12-08 21:59:01 +0000 | [diff] [blame] | 387 | case tok::eof: |
| 388 | Diag(Tok, diag::err_expected_external_declaration); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 389 | return DeclGroupPtrTy(); |
Chris Lattner | c301815 | 2007-08-10 20:57:02 +0000 | [diff] [blame] | 390 | case tok::kw___extension__: { |
Chris Lattner | c46d1a1 | 2008-10-20 06:45:43 +0000 | [diff] [blame] | 391 | // __extension__ silences extension warnings in the subexpression. |
| 392 | ExtensionRAIIObject O(Diags); // Use RAII to do this. |
Chris Lattner | 39146d6 | 2008-10-20 06:51:33 +0000 | [diff] [blame] | 393 | ConsumeToken(); |
Chris Lattner | c46d1a1 | 2008-10-20 06:45:43 +0000 | [diff] [blame] | 394 | return ParseExternalDeclaration(); |
Chris Lattner | c301815 | 2007-08-10 20:57:02 +0000 | [diff] [blame] | 395 | } |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 396 | case tok::kw_asm: { |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 397 | OwningExprResult Result(ParseSimpleAsm()); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 398 | |
Anders Carlsson | 3f9424f | 2008-02-08 00:23:11 +0000 | [diff] [blame] | 399 | ExpectAndConsume(tok::semi, diag::err_expected_semi_after, |
| 400 | "top-level asm block"); |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 401 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 402 | if (Result.isInvalid()) |
| 403 | return DeclGroupPtrTy(); |
| 404 | SingleDecl = Actions.ActOnFileScopeAsmDecl(Tok.getLocation(), move(Result)); |
| 405 | break; |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 406 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 407 | case tok::at: |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 408 | // @ is not a legal token unless objc is enabled, no need to check for ObjC. |
| 409 | /// FIXME: ParseObjCAtDirectives should return a DeclGroup for things like |
| 410 | /// @class foo, bar; |
| 411 | SingleDecl = ParseObjCAtDirectives(); |
| 412 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 413 | case tok::minus: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 414 | case tok::plus: |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 415 | if (!getLang().ObjC1) { |
| 416 | Diag(Tok, diag::err_expected_external_declaration); |
| 417 | ConsumeToken(); |
| 418 | return DeclGroupPtrTy(); |
| 419 | } |
| 420 | SingleDecl = ParseObjCMethodDefinition(); |
| 421 | break; |
Douglas Gregor | f780abc | 2008-12-30 03:27:21 +0000 | [diff] [blame] | 422 | case tok::kw_using: |
Chris Lattner | 8f08cb7 | 2007-08-25 06:57:03 +0000 | [diff] [blame] | 423 | case tok::kw_namespace: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 424 | case tok::kw_typedef: |
Douglas Gregor | adcac88 | 2008-12-01 23:54:00 +0000 | [diff] [blame] | 425 | case tok::kw_template: |
| 426 | case tok::kw_export: // As in 'export template' |
Anders Carlsson | 511d7ab | 2009-03-11 16:27:10 +0000 | [diff] [blame] | 427 | case tok::kw_static_assert: |
Chris Lattner | bae3511 | 2007-08-25 18:15:16 +0000 | [diff] [blame] | 428 | // A function definition cannot start with a these keywords. |
Chris Lattner | 97144fc | 2009-04-02 04:16:50 +0000 | [diff] [blame] | 429 | { |
| 430 | SourceLocation DeclEnd; |
| 431 | return ParseDeclaration(Declarator::FileContext, DeclEnd); |
| 432 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 433 | default: |
| 434 | // We can't tell whether this is a function-definition or declaration yet. |
| 435 | return ParseDeclarationOrFunctionDefinition(); |
| 436 | } |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 437 | |
| 438 | // This routine returns a DeclGroup, if the thing we parsed only contains a |
| 439 | // single decl, convert it now. |
| 440 | return Actions.ConvertDeclToDeclGroup(SingleDecl); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 441 | } |
| 442 | |
Douglas Gregor | 1426e53 | 2009-05-12 21:31:51 +0000 | [diff] [blame] | 443 | /// \brief Determine whether the current token, if it occurs after a |
| 444 | /// declarator, continues a declaration or declaration list. |
| 445 | bool Parser::isDeclarationAfterDeclarator() { |
| 446 | return Tok.is(tok::equal) || // int X()= -> not a function def |
| 447 | Tok.is(tok::comma) || // int X(), -> not a function def |
| 448 | Tok.is(tok::semi) || // int X(); -> not a function def |
| 449 | Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def |
| 450 | Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def |
| 451 | (getLang().CPlusPlus && |
| 452 | Tok.is(tok::l_paren)); // int X(0) -> not a function def [C++] |
| 453 | } |
| 454 | |
| 455 | /// \brief Determine whether the current token, if it occurs after a |
| 456 | /// declarator, indicates the start of a function definition. |
| 457 | bool Parser::isStartOfFunctionDefinition() { |
| 458 | return Tok.is(tok::l_brace) || // int X() {} |
| 459 | (!getLang().CPlusPlus && |
| 460 | isDeclarationSpecifier()) || // int X(f) int f; {} |
| 461 | (getLang().CPlusPlus && |
| 462 | (Tok.is(tok::colon) || // X() : Base() {} (used for ctors) |
| 463 | Tok.is(tok::kw_try))); // X() try { ... } |
| 464 | } |
| 465 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 466 | /// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or |
| 467 | /// 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] | 468 | /// compound-statement in function-definition. TemplateParams, if |
| 469 | /// non-NULL, provides the template parameters when we're parsing a |
| 470 | /// C++ template-declaration. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 471 | /// |
| 472 | /// function-definition: [C99 6.9.1] |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 473 | /// decl-specs declarator declaration-list[opt] compound-statement |
| 474 | /// [C90] function-definition: [C99 6.7.1] - implicit int result |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 475 | /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 476 | /// |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 477 | /// declaration: [C99 6.7] |
Chris Lattner | 697e15f | 2007-08-22 06:06:56 +0000 | [diff] [blame] | 478 | /// declaration-specifiers init-declarator-list[opt] ';' |
| 479 | /// [!C99] init-declarator-list ';' [TODO: warn in c99 mode] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 480 | /// [OMP] threadprivate-directive [TODO] |
| 481 | /// |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 482 | Parser::DeclGroupPtrTy |
Douglas Gregor | 7091319 | 2009-05-12 21:43:46 +0000 | [diff] [blame] | 483 | Parser::ParseDeclarationOrFunctionDefinition(AccessSpecifier AS) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 484 | // Parse the common declaration-specifiers piece. |
| 485 | DeclSpec DS; |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 486 | ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 487 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 488 | // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" |
| 489 | // declaration-specifiers init-declarator-list[opt] ';' |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 490 | if (Tok.is(tok::semi)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 491 | ConsumeToken(); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 492 | DeclPtrTy TheDecl = Actions.ParsedFreeStandingDeclSpec(CurScope, DS); |
| 493 | return Actions.ConvertDeclToDeclGroup(TheDecl); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 494 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 495 | |
Daniel Dunbar | 246e70f | 2008-09-26 04:48:09 +0000 | [diff] [blame] | 496 | // ObjC2 allows prefix attributes on class interfaces and protocols. |
| 497 | // FIXME: This still needs better diagnostics. We should only accept |
| 498 | // attributes here, no types, etc. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 499 | if (getLang().ObjC2 && Tok.is(tok::at)) { |
Steve Naroff | dac269b | 2007-08-20 21:31:48 +0000 | [diff] [blame] | 500 | SourceLocation AtLoc = ConsumeToken(); // the "@" |
Daniel Dunbar | 246e70f | 2008-09-26 04:48:09 +0000 | [diff] [blame] | 501 | if (!Tok.isObjCAtKeyword(tok::objc_interface) && |
| 502 | !Tok.isObjCAtKeyword(tok::objc_protocol)) { |
| 503 | Diag(Tok, diag::err_objc_unexpected_attr); |
Chris Lattner | cb53b36 | 2007-12-27 19:57:00 +0000 | [diff] [blame] | 504 | SkipUntil(tok::semi); // FIXME: better skip? |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 505 | return DeclGroupPtrTy(); |
Chris Lattner | cb53b36 | 2007-12-27 19:57:00 +0000 | [diff] [blame] | 506 | } |
Fariborz Jahanian | 0de2ae2 | 2008-01-02 19:17:38 +0000 | [diff] [blame] | 507 | const char *PrevSpec = 0; |
| 508 | if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec)) |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 509 | Diag(AtLoc, diag::err_invalid_decl_spec_combination) << PrevSpec; |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 510 | |
| 511 | DeclPtrTy TheDecl; |
Daniel Dunbar | 246e70f | 2008-09-26 04:48:09 +0000 | [diff] [blame] | 512 | if (Tok.isObjCAtKeyword(tok::objc_protocol)) |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 513 | TheDecl = ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes()); |
| 514 | else |
| 515 | TheDecl = ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()); |
| 516 | return Actions.ConvertDeclToDeclGroup(TheDecl); |
Steve Naroff | dac269b | 2007-08-20 21:31:48 +0000 | [diff] [blame] | 517 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 518 | |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 519 | // If the declspec consisted only of 'extern' and we have a string |
| 520 | // literal following it, this must be a C++ linkage specifier like |
| 521 | // 'extern "C"'. |
Chris Lattner | 3c6f6a7 | 2008-01-12 07:08:43 +0000 | [diff] [blame] | 522 | if (Tok.is(tok::string_literal) && getLang().CPlusPlus && |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 523 | DS.getStorageClassSpec() == DeclSpec::SCS_extern && |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 524 | DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) { |
| 525 | DeclPtrTy TheDecl = ParseLinkage(Declarator::FileContext); |
| 526 | return Actions.ConvertDeclToDeclGroup(TheDecl); |
| 527 | } |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 528 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 529 | // Parse the first declarator. |
| 530 | Declarator DeclaratorInfo(DS, Declarator::FileContext); |
| 531 | ParseDeclarator(DeclaratorInfo); |
| 532 | // Error parsing the declarator? |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 533 | if (!DeclaratorInfo.hasName()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 534 | // If so, skip until the semi-colon or a }. |
Douglas Gregor | cb43d99 | 2008-12-01 23:03:32 +0000 | [diff] [blame] | 535 | SkipUntil(tok::r_brace, true, true); |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 536 | if (Tok.is(tok::semi)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 537 | ConsumeToken(); |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 538 | return DeclGroupPtrTy(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 539 | } |
| 540 | |
Douglas Gregor | 1426e53 | 2009-05-12 21:31:51 +0000 | [diff] [blame] | 541 | // If we have a declaration or declarator list, handle it. |
| 542 | if (isDeclarationAfterDeclarator()) { |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 543 | // Parse the init-declarator-list for a normal declaration. |
Chris Lattner | 23c4b18 | 2009-03-29 17:18:04 +0000 | [diff] [blame] | 544 | DeclGroupPtrTy DG = |
| 545 | ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo); |
| 546 | // Eat the semi colon after the declaration. |
| 547 | ExpectAndConsume(tok::semi, diag::err_expected_semi_declation); |
| 548 | return DG; |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 549 | } |
| 550 | |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 551 | if (DeclaratorInfo.isFunctionDeclarator() && |
Douglas Gregor | 1426e53 | 2009-05-12 21:31:51 +0000 | [diff] [blame] | 552 | isStartOfFunctionDefinition()) { |
Steve Naroff | e39bfd0 | 2008-02-14 02:58:32 +0000 | [diff] [blame] | 553 | if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { |
| 554 | Diag(Tok, diag::err_function_declared_typedef); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 555 | |
Steve Naroff | e39bfd0 | 2008-02-14 02:58:32 +0000 | [diff] [blame] | 556 | if (Tok.is(tok::l_brace)) { |
| 557 | // This recovery skips the entire function body. It would be nice |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 558 | // to simply call ParseFunctionDefinition() below, however Sema |
Steve Naroff | e39bfd0 | 2008-02-14 02:58:32 +0000 | [diff] [blame] | 559 | // assumes the declarator represents a function, not a typedef. |
| 560 | ConsumeBrace(); |
| 561 | SkipUntil(tok::r_brace, true); |
| 562 | } else { |
| 563 | SkipUntil(tok::semi); |
| 564 | } |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 565 | return DeclGroupPtrTy(); |
Steve Naroff | e39bfd0 | 2008-02-14 02:58:32 +0000 | [diff] [blame] | 566 | } |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 567 | DeclPtrTy TheDecl = ParseFunctionDefinition(DeclaratorInfo); |
| 568 | return Actions.ConvertDeclToDeclGroup(TheDecl); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 569 | } |
Chris Lattner | 682bf92 | 2009-03-29 16:50:03 +0000 | [diff] [blame] | 570 | |
| 571 | if (DeclaratorInfo.isFunctionDeclarator()) |
| 572 | Diag(Tok, diag::err_expected_fn_body); |
| 573 | else |
| 574 | Diag(Tok, diag::err_invalid_token_after_toplevel_declarator); |
| 575 | SkipUntil(tok::semi); |
| 576 | return DeclGroupPtrTy(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 577 | } |
| 578 | |
| 579 | /// ParseFunctionDefinition - We parsed and verified that the specified |
| 580 | /// Declarator is well formed. If this is a K&R-style function, read the |
| 581 | /// parameters declaration-list, then start the compound-statement. |
| 582 | /// |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 583 | /// function-definition: [C99 6.9.1] |
| 584 | /// decl-specs declarator declaration-list[opt] compound-statement |
| 585 | /// [C90] function-definition: [C99 6.7.1] - implicit int result |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 586 | /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 587 | /// [C++] function-definition: [C++ 8.4] |
Chris Lattner | 23c4b18 | 2009-03-29 17:18:04 +0000 | [diff] [blame] | 588 | /// decl-specifier-seq[opt] declarator ctor-initializer[opt] |
| 589 | /// function-body |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 590 | /// [C++] function-definition: [C++ 8.4] |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 591 | /// decl-specifier-seq[opt] declarator function-try-block |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 592 | /// |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 593 | Parser::DeclPtrTy Parser::ParseFunctionDefinition(Declarator &D) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 594 | const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0); |
| 595 | assert(FnTypeInfo.Kind == DeclaratorChunk::Function && |
| 596 | "This isn't a function declarator!"); |
| 597 | const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 598 | |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 599 | // If this is C90 and the declspecs were completely missing, fudge in an |
| 600 | // implicit int. We do this here because this is the only place where |
| 601 | // declaration-specifiers are completely optional in the grammar. |
Chris Lattner | 2a327d1 | 2009-02-27 18:35:46 +0000 | [diff] [blame] | 602 | if (getLang().ImplicitInt && D.getDeclSpec().isEmpty()) { |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 603 | const char *PrevSpec; |
Chris Lattner | 31c2868 | 2008-10-20 02:01:34 +0000 | [diff] [blame] | 604 | D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int, |
| 605 | D.getIdentifierLoc(), |
| 606 | PrevSpec); |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 607 | D.SetRangeBegin(D.getDeclSpec().getSourceRange().getBegin()); |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 608 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 609 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 610 | // If this declaration was formed with a K&R-style identifier list for the |
| 611 | // arguments, parse declarations for all of the args next. |
| 612 | // int foo(a,b) int a; float b; {} |
| 613 | if (!FTI.hasPrototype && FTI.NumArgs != 0) |
| 614 | ParseKNRParamDeclarations(D); |
| 615 | |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 616 | // We should have either an opening brace or, in a C++ constructor, |
| 617 | // we may have a colon. |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 618 | if (Tok.isNot(tok::l_brace) && Tok.isNot(tok::colon) && |
| 619 | Tok.isNot(tok::kw_try)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 620 | Diag(Tok, diag::err_expected_fn_body); |
| 621 | |
| 622 | // Skip over garbage, until we get to '{'. Don't eat the '{'. |
| 623 | SkipUntil(tok::l_brace, true, true); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 624 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 625 | // If we didn't find the '{', bail out. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 626 | if (Tok.isNot(tok::l_brace)) |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 627 | return DeclPtrTy(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 628 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 629 | |
Chris Lattner | b652cea | 2007-10-09 17:14:05 +0000 | [diff] [blame] | 630 | // Enter a scope for the function body. |
Douglas Gregor | 8935b8b | 2008-12-10 06:34:36 +0000 | [diff] [blame] | 631 | ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 632 | |
Chris Lattner | b652cea | 2007-10-09 17:14:05 +0000 | [diff] [blame] | 633 | // Tell the actions module that we have entered a function definition with the |
| 634 | // specified Declarator for the function. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 635 | DeclPtrTy Res = Actions.ActOnStartOfFunctionDef(CurScope, D); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 636 | |
Sebastian Redl | d3a413d | 2009-04-26 20:35:05 +0000 | [diff] [blame] | 637 | if (Tok.is(tok::kw_try)) |
| 638 | return ParseFunctionTryBlock(Res); |
| 639 | |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 640 | // If we have a colon, then we're probably parsing a C++ |
| 641 | // ctor-initializer. |
| 642 | if (Tok.is(tok::colon)) |
| 643 | ParseConstructorInitializer(Res); |
| 644 | |
Chris Lattner | 40e9bc8 | 2009-03-05 00:49:17 +0000 | [diff] [blame] | 645 | return ParseFunctionStatementBody(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 646 | } |
| 647 | |
| 648 | /// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides |
| 649 | /// types for a function with a K&R-style identifier list for arguments. |
| 650 | void Parser::ParseKNRParamDeclarations(Declarator &D) { |
| 651 | // We know that the top-level of this declarator is a function. |
| 652 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; |
| 653 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 654 | // Enter function-declaration scope, limiting any declarators to the |
| 655 | // function prototype scope, including parameter declarators. |
Douglas Gregor | 3218c4b | 2009-01-09 22:42:13 +0000 | [diff] [blame] | 656 | ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope|Scope::DeclScope); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 657 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 658 | // Read all the argument declarations. |
| 659 | while (isDeclarationSpecifier()) { |
| 660 | SourceLocation DSStart = Tok.getLocation(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 661 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 662 | // Parse the common declaration-specifiers piece. |
| 663 | DeclSpec DS; |
| 664 | ParseDeclarationSpecifiers(DS); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 665 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 666 | // C99 6.9.1p6: 'each declaration in the declaration list shall have at |
| 667 | // least one declarator'. |
| 668 | // NOTE: GCC just makes this an ext-warn. It's not clear what it does with |
| 669 | // the declarations though. It's trivial to ignore them, really hard to do |
| 670 | // anything else with them. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 671 | if (Tok.is(tok::semi)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 672 | Diag(DSStart, diag::err_declaration_does_not_declare_param); |
| 673 | ConsumeToken(); |
| 674 | continue; |
| 675 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 676 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 677 | // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other |
| 678 | // than register. |
| 679 | if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && |
| 680 | DS.getStorageClassSpec() != DeclSpec::SCS_register) { |
| 681 | Diag(DS.getStorageClassSpecLoc(), |
| 682 | diag::err_invalid_storage_class_in_func_decl); |
| 683 | DS.ClearStorageClassSpecs(); |
| 684 | } |
| 685 | if (DS.isThreadSpecified()) { |
| 686 | Diag(DS.getThreadSpecLoc(), |
| 687 | diag::err_invalid_storage_class_in_func_decl); |
| 688 | DS.ClearStorageClassSpecs(); |
| 689 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 690 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 691 | // Parse the first declarator attached to this declspec. |
| 692 | Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext); |
| 693 | ParseDeclarator(ParmDeclarator); |
| 694 | |
| 695 | // Handle the full declarator list. |
| 696 | while (1) { |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 697 | Action::AttrTy *AttrList; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 698 | // If attributes are present, parse them. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 699 | if (Tok.is(tok::kw___attribute)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 700 | // FIXME: attach attributes too. |
| 701 | AttrList = ParseAttributes(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 702 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 703 | // Ask the actions module to compute the type for this declarator. |
Chris Lattner | b28317a | 2009-03-28 19:18:32 +0000 | [diff] [blame] | 704 | Action::DeclPtrTy Param = |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 705 | Actions.ActOnParamDeclarator(CurScope, ParmDeclarator); |
Steve Naroff | 2bd42fa | 2007-09-10 20:51:04 +0000 | [diff] [blame] | 706 | |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 707 | if (Param && |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 708 | // A missing identifier has already been diagnosed. |
| 709 | ParmDeclarator.getIdentifier()) { |
| 710 | |
| 711 | // Scan the argument list looking for the correct param to apply this |
| 712 | // type. |
| 713 | for (unsigned i = 0; ; ++i) { |
| 714 | // C99 6.9.1p6: those declarators shall declare only identifiers from |
| 715 | // the identifier list. |
| 716 | if (i == FTI.NumArgs) { |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 717 | Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param) |
Chris Lattner | 6898e33 | 2008-11-19 07:51:13 +0000 | [diff] [blame] | 718 | << ParmDeclarator.getIdentifier(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 719 | break; |
| 720 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 721 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 722 | if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) { |
| 723 | // Reject redefinitions of parameters. |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 724 | if (FTI.ArgInfo[i].Param) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 725 | Diag(ParmDeclarator.getIdentifierLoc(), |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 726 | diag::err_param_redefinition) |
Chris Lattner | 6898e33 | 2008-11-19 07:51:13 +0000 | [diff] [blame] | 727 | << ParmDeclarator.getIdentifier(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 728 | } else { |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 729 | FTI.ArgInfo[i].Param = Param; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 730 | } |
| 731 | break; |
| 732 | } |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | // If we don't have a comma, it is either the end of the list (a ';') or |
| 737 | // an error, bail out. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 738 | if (Tok.isNot(tok::comma)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 739 | break; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 740 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 741 | // Consume the comma. |
| 742 | ConsumeToken(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 743 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 744 | // Parse the next declarator. |
| 745 | ParmDeclarator.clear(); |
| 746 | ParseDeclarator(ParmDeclarator); |
| 747 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 748 | |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 749 | if (Tok.is(tok::semi)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 750 | ConsumeToken(); |
| 751 | } else { |
| 752 | Diag(Tok, diag::err_parse_error); |
| 753 | // Skip to end of block or statement |
| 754 | SkipUntil(tok::semi, true); |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 755 | if (Tok.is(tok::semi)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 756 | ConsumeToken(); |
| 757 | } |
| 758 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 759 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 760 | // The actions module must verify that all arguments were declared. |
Douglas Gregor | a3a8351 | 2009-04-01 23:51:29 +0000 | [diff] [blame] | 761 | Actions.ActOnFinishKNRParamDeclarations(CurScope, D, Tok.getLocation()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 762 | } |
| 763 | |
| 764 | |
| 765 | /// ParseAsmStringLiteral - This is just a normal string-literal, but is not |
| 766 | /// allowed to be a wide string, and is not subject to character translation. |
| 767 | /// |
| 768 | /// [GNU] asm-string-literal: |
| 769 | /// string-literal |
| 770 | /// |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 771 | Parser::OwningExprResult Parser::ParseAsmStringLiteral() { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 772 | if (!isTokenStringLiteral()) { |
| 773 | Diag(Tok, diag::err_expected_string_literal); |
Sebastian Redl | 61364dd | 2008-12-11 19:30:53 +0000 | [diff] [blame] | 774 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 775 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 776 | |
Sebastian Redl | 20df9b7 | 2008-12-11 22:51:44 +0000 | [diff] [blame] | 777 | OwningExprResult Res(ParseStringLiteralExpression()); |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 778 | if (Res.isInvalid()) return move(Res); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 779 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 780 | // TODO: Diagnose: wide string literal in 'asm' |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 781 | |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 782 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 783 | } |
| 784 | |
| 785 | /// ParseSimpleAsm |
| 786 | /// |
| 787 | /// [GNU] simple-asm-expr: |
| 788 | /// 'asm' '(' asm-string-literal ')' |
| 789 | /// |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 790 | Parser::OwningExprResult Parser::ParseSimpleAsm(SourceLocation *EndLoc) { |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 791 | assert(Tok.is(tok::kw_asm) && "Not an asm!"); |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 792 | SourceLocation Loc = ConsumeToken(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 793 | |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 794 | if (Tok.isNot(tok::l_paren)) { |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 795 | Diag(Tok, diag::err_expected_lparen_after) << "asm"; |
Sebastian Redl | 61364dd | 2008-12-11 19:30:53 +0000 | [diff] [blame] | 796 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 797 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 798 | |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 799 | Loc = ConsumeParen(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 800 | |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 801 | OwningExprResult Result(ParseAsmStringLiteral()); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 802 | |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 803 | if (Result.isInvalid()) { |
| 804 | SkipUntil(tok::r_paren, true, true); |
| 805 | if (EndLoc) |
| 806 | *EndLoc = Tok.getLocation(); |
| 807 | ConsumeAnyToken(); |
| 808 | } else { |
| 809 | Loc = MatchRHSPunctuation(tok::r_paren, Loc); |
| 810 | if (EndLoc) |
| 811 | *EndLoc = Loc; |
| 812 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 813 | |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 814 | return move(Result); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 815 | } |
| 816 | |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 817 | /// TryAnnotateTypeOrScopeToken - If the current token position is on a |
| 818 | /// typename (possibly qualified in C++) or a C++ scope specifier not followed |
| 819 | /// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens |
| 820 | /// with a single annotation token representing the typename or C++ scope |
| 821 | /// respectively. |
| 822 | /// This simplifies handling of C++ scope specifiers and allows efficient |
| 823 | /// backtracking without the need to re-parse and resolve nested-names and |
| 824 | /// typenames. |
Argyrios Kyrtzidis | 44802cc | 2008-11-26 21:51:07 +0000 | [diff] [blame] | 825 | /// It will mainly be called when we expect to treat identifiers as typenames |
| 826 | /// (if they are typenames). For example, in C we do not expect identifiers |
| 827 | /// inside expressions to be treated as typenames so it will not be called |
| 828 | /// for expressions in C. |
| 829 | /// 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] | 830 | /// 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] | 831 | /// will not be called twice, once to check whether we have a declaration |
| 832 | /// specifier, and another one to get the actual type inside |
| 833 | /// ParseDeclarationSpecifiers). |
Chris Lattner | a7bc7c8 | 2009-01-04 23:23:14 +0000 | [diff] [blame] | 834 | /// |
| 835 | /// This returns true if the token was annotated. |
Chris Lattner | 55a7cef | 2009-01-05 00:13:00 +0000 | [diff] [blame] | 836 | /// |
| 837 | /// Note that this routine emits an error if you call it with ::new or ::delete |
| 838 | /// as the current tokens, so only call it in contexts where these are invalid. |
Chris Lattner | 5b45473 | 2009-01-05 03:55:46 +0000 | [diff] [blame] | 839 | bool Parser::TryAnnotateTypeOrScopeToken() { |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 840 | assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon) |
| 841 | || Tok.is(tok::kw_typename)) && |
Chris Lattner | 7452c6f | 2009-01-05 01:24:05 +0000 | [diff] [blame] | 842 | "Cannot be a type or scope token!"); |
| 843 | |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 844 | if (Tok.is(tok::kw_typename)) { |
| 845 | // Parse a C++ typename-specifier, e.g., "typename T::type". |
| 846 | // |
| 847 | // typename-specifier: |
| 848 | // 'typename' '::' [opt] nested-name-specifier identifier |
| 849 | // 'typename' '::' [opt] nested-name-specifier template [opt] |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 850 | // simple-template-id |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 851 | SourceLocation TypenameLoc = ConsumeToken(); |
| 852 | CXXScopeSpec SS; |
| 853 | bool HadNestedNameSpecifier = ParseOptionalCXXScopeSpecifier(SS); |
| 854 | if (!HadNestedNameSpecifier) { |
| 855 | Diag(Tok.getLocation(), diag::err_expected_qualified_after_typename); |
| 856 | return false; |
| 857 | } |
| 858 | |
| 859 | TypeResult Ty; |
| 860 | if (Tok.is(tok::identifier)) { |
| 861 | // FIXME: check whether the next token is '<', first! |
| 862 | Ty = Actions.ActOnTypenameType(TypenameLoc, SS, *Tok.getIdentifierInfo(), |
| 863 | Tok.getLocation()); |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 864 | } else if (Tok.is(tok::annot_template_id)) { |
| 865 | TemplateIdAnnotation *TemplateId |
| 866 | = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); |
| 867 | if (TemplateId->Kind == TNK_Function_template) { |
| 868 | Diag(Tok, diag::err_typename_refers_to_non_type_template) |
| 869 | << Tok.getAnnotationRange(); |
| 870 | return false; |
| 871 | } |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 872 | |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 873 | AnnotateTemplateIdTokenAsType(0); |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 874 | assert(Tok.is(tok::annot_typename) && |
| 875 | "AnnotateTemplateIdTokenAsType isn't working properly"); |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 876 | if (Tok.getAnnotationValue()) |
| 877 | Ty = Actions.ActOnTypenameType(TypenameLoc, SS, SourceLocation(), |
| 878 | Tok.getAnnotationValue()); |
| 879 | else |
| 880 | Ty = true; |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 881 | } else { |
| 882 | Diag(Tok, diag::err_expected_type_name_after_typename) |
| 883 | << SS.getRange(); |
| 884 | return false; |
| 885 | } |
| 886 | |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 887 | Tok.setKind(tok::annot_typename); |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 888 | Tok.setAnnotationValue(Ty.isInvalid()? 0 : Ty.get()); |
Douglas Gregor | 1734317 | 2009-04-01 00:28:59 +0000 | [diff] [blame] | 889 | Tok.setAnnotationEndLoc(Tok.getLocation()); |
| 890 | Tok.setLocation(TypenameLoc); |
| 891 | PP.AnnotateCachedTokens(Tok); |
| 892 | return true; |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 893 | } |
| 894 | |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 895 | CXXScopeSpec SS; |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame] | 896 | if (getLang().CPlusPlus) |
Chris Lattner | 7a0ab5f | 2009-01-06 06:59:53 +0000 | [diff] [blame] | 897 | ParseOptionalCXXScopeSpecifier(SS); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 898 | |
| 899 | if (Tok.is(tok::identifier)) { |
Chris Lattner | 608d1fc | 2009-01-05 01:49:50 +0000 | [diff] [blame] | 900 | // Determine whether the identifier is a type name. |
Steve Naroff | b43a50f | 2009-01-28 19:39:02 +0000 | [diff] [blame] | 901 | if (TypeTy *Ty = Actions.getTypeName(*Tok.getIdentifierInfo(), |
Douglas Gregor | b696ea3 | 2009-02-04 17:00:24 +0000 | [diff] [blame] | 902 | Tok.getLocation(), CurScope, &SS)) { |
Chris Lattner | 608d1fc | 2009-01-05 01:49:50 +0000 | [diff] [blame] | 903 | // This is a typename. Replace the current token in-place with an |
| 904 | // annotation type token. |
Chris Lattner | b31757b | 2009-01-06 05:06:21 +0000 | [diff] [blame] | 905 | Tok.setKind(tok::annot_typename); |
Chris Lattner | 608d1fc | 2009-01-05 01:49:50 +0000 | [diff] [blame] | 906 | Tok.setAnnotationValue(Ty); |
| 907 | Tok.setAnnotationEndLoc(Tok.getLocation()); |
| 908 | if (SS.isNotEmpty()) // it was a C++ qualified type name. |
| 909 | Tok.setLocation(SS.getBeginLoc()); |
| 910 | |
| 911 | // In case the tokens were cached, have Preprocessor replace |
| 912 | // them with the annotation token. |
| 913 | PP.AnnotateCachedTokens(Tok); |
| 914 | return true; |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 915 | } |
| 916 | |
| 917 | if (!getLang().CPlusPlus) { |
Chris Lattner | 608d1fc | 2009-01-05 01:49:50 +0000 | [diff] [blame] | 918 | // If we're in C, we can't have :: tokens at all (the lexer won't return |
| 919 | // them). If the identifier is not a type, then it can't be scope either, |
| 920 | // just early exit. |
| 921 | return false; |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 922 | } |
Chris Lattner | 608d1fc | 2009-01-05 01:49:50 +0000 | [diff] [blame] | 923 | |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 924 | // 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] | 925 | if (NextToken().is(tok::less)) { |
Douglas Gregor | 7532dc6 | 2009-03-30 22:58:21 +0000 | [diff] [blame] | 926 | TemplateTy Template; |
Douglas Gregor | 55f6b14 | 2009-02-09 18:46:07 +0000 | [diff] [blame] | 927 | if (TemplateNameKind TNK |
| 928 | = Actions.isTemplateName(*Tok.getIdentifierInfo(), |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 929 | CurScope, Template, &SS)) |
Douglas Gregor | 55f6b14 | 2009-02-09 18:46:07 +0000 | [diff] [blame] | 930 | AnnotateTemplateIdToken(Template, TNK, &SS); |
Douglas Gregor | 55f6b14 | 2009-02-09 18:46:07 +0000 | [diff] [blame] | 931 | } |
Douglas Gregor | d6fb7ef | 2008-12-18 19:37:40 +0000 | [diff] [blame] | 932 | |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 933 | // The current token, which is either an identifier or a |
| 934 | // template-id, is not part of the annotation. Fall through to |
| 935 | // push that token back into the stream and complete the C++ scope |
| 936 | // specifier annotation. |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 937 | } |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 938 | |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 939 | if (Tok.is(tok::annot_template_id)) { |
| 940 | TemplateIdAnnotation *TemplateId |
| 941 | = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); |
Douglas Gregor | c45c232 | 2009-03-31 00:43:58 +0000 | [diff] [blame] | 942 | if (TemplateId->Kind == TNK_Type_template) { |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 943 | // A template-id that refers to a type was parsed into a |
| 944 | // template-id annotation in a context where we weren't allowed |
| 945 | // to produce a type annotation token. Update the template-id |
| 946 | // annotation token to a type annotation token now. |
Douglas Gregor | 31a19b6 | 2009-04-01 21:51:26 +0000 | [diff] [blame] | 947 | AnnotateTemplateIdTokenAsType(&SS); |
| 948 | return true; |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 949 | } |
| 950 | } |
Douglas Gregor | d6fb7ef | 2008-12-18 19:37:40 +0000 | [diff] [blame] | 951 | |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 952 | if (SS.isEmpty()) |
Chris Lattner | a7bc7c8 | 2009-01-04 23:23:14 +0000 | [diff] [blame] | 953 | return false; |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 954 | |
| 955 | // A C++ scope specifier that isn't followed by a typename. |
| 956 | // Push the current token back into the token stream (or revert it if it is |
| 957 | // cached) and use an annotation scope token for current token. |
| 958 | if (PP.isBacktrackEnabled()) |
| 959 | PP.RevertCachedTokens(1); |
| 960 | else |
| 961 | PP.EnterToken(Tok); |
| 962 | Tok.setKind(tok::annot_cxxscope); |
Douglas Gregor | 3507369 | 2009-03-26 23:56:24 +0000 | [diff] [blame] | 963 | Tok.setAnnotationValue(SS.getScopeRep()); |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 964 | Tok.setAnnotationRange(SS.getRange()); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 965 | |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 966 | // In case the tokens were cached, have Preprocessor replace them with the |
| 967 | // annotation token. |
| 968 | PP.AnnotateCachedTokens(Tok); |
Chris Lattner | a7bc7c8 | 2009-01-04 23:23:14 +0000 | [diff] [blame] | 969 | return true; |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 970 | } |
| 971 | |
| 972 | /// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 973 | /// annotates C++ scope specifiers and template-ids. This returns |
| 974 | /// true if the token was annotated. |
Chris Lattner | 55a7cef | 2009-01-05 00:13:00 +0000 | [diff] [blame] | 975 | /// |
| 976 | /// Note that this routine emits an error if you call it with ::new or ::delete |
| 977 | /// as the current tokens, so only call it in contexts where these are invalid. |
Chris Lattner | 5e02c47 | 2009-01-05 00:07:25 +0000 | [diff] [blame] | 978 | bool Parser::TryAnnotateCXXScopeToken() { |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame] | 979 | assert(getLang().CPlusPlus && |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 980 | "Call sites of this function should be guarded by checking for C++"); |
Chris Lattner | 7452c6f | 2009-01-05 01:24:05 +0000 | [diff] [blame] | 981 | assert((Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && |
| 982 | "Cannot be a type or scope token!"); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 983 | |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame] | 984 | CXXScopeSpec SS; |
Chris Lattner | 7a0ab5f | 2009-01-06 06:59:53 +0000 | [diff] [blame] | 985 | if (!ParseOptionalCXXScopeSpecifier(SS)) |
Douglas Gregor | 39a8de1 | 2009-02-25 19:37:18 +0000 | [diff] [blame] | 986 | return Tok.is(tok::annot_template_id); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 987 | |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 988 | // Push the current token back into the token stream (or revert it if it is |
| 989 | // cached) and use an annotation scope token for current token. |
| 990 | if (PP.isBacktrackEnabled()) |
| 991 | PP.RevertCachedTokens(1); |
| 992 | else |
| 993 | PP.EnterToken(Tok); |
| 994 | Tok.setKind(tok::annot_cxxscope); |
Douglas Gregor | 3507369 | 2009-03-26 23:56:24 +0000 | [diff] [blame] | 995 | Tok.setAnnotationValue(SS.getScopeRep()); |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 996 | Tok.setAnnotationRange(SS.getRange()); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 997 | |
Chris Lattner | 6ec76d4 | 2009-01-04 22:32:19 +0000 | [diff] [blame] | 998 | // In case the tokens were cached, have Preprocessor replace them with the |
| 999 | // annotation token. |
| 1000 | PP.AnnotateCachedTokens(Tok); |
Chris Lattner | 5e02c47 | 2009-01-05 00:07:25 +0000 | [diff] [blame] | 1001 | return true; |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 1002 | } |