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" |
Daniel Dunbar | e4858a6 | 2008-08-11 03:45:03 +0000 | [diff] [blame] | 15 | #include "clang/Basic/Diagnostic.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 | c46d1a1 | 2008-10-20 06:45:43 +0000 | [diff] [blame] | 18 | #include "ExtensionRAIIObject.h" |
Daniel Dunbar | fcdd8fe | 2008-10-04 19:21:03 +0000 | [diff] [blame] | 19 | #include "ParsePragma.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 20 | using namespace clang; |
| 21 | |
| 22 | Parser::Parser(Preprocessor &pp, Action &actions) |
| 23 | : PP(pp), Actions(actions), Diags(PP.getDiagnostics()) { |
| 24 | Tok.setKind(tok::eof); |
| 25 | CurScope = 0; |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 26 | NumCachedScopes = 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 27 | ParenCount = BracketCount = BraceCount = 0; |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 28 | ObjCImpDecl = 0; |
Daniel Dunbar | fcdd8fe | 2008-10-04 19:21:03 +0000 | [diff] [blame] | 29 | |
| 30 | // Add #pragma handlers. These are removed and destroyed in the |
| 31 | // destructor. |
| 32 | PackHandler = |
| 33 | new PragmaPackHandler(&PP.getIdentifierTable().get("pack"), actions); |
| 34 | PP.AddPragmaHandler(0, PackHandler); |
| 35 | |
Argyrios Kyrtzidis | 4cc18a4 | 2008-06-24 22:12:16 +0000 | [diff] [blame] | 36 | // Instantiate a LexedMethodsForTopClass for all the non-nested classes. |
| 37 | PushTopClassStack(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 38 | } |
| 39 | |
| 40 | /// Out-of-line virtual destructor to provide home for Action class. |
Sebastian Redl | 7f792fa | 2008-12-09 19:36:21 +0000 | [diff] [blame] | 41 | ActionBase::~ActionBase() {} |
| 42 | |
| 43 | /// Out-of-line virtual destructor to provide home for Action class. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 44 | Action::~Action() {} |
| 45 | |
| 46 | |
Chris Lattner | 3cbfe2c | 2008-11-22 00:59:29 +0000 | [diff] [blame] | 47 | DiagnosticBuilder Parser::Diag(SourceLocation Loc, unsigned DiagID) { |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 48 | return Diags.Report(FullSourceLoc(Loc,PP.getSourceManager()), DiagID); |
| 49 | } |
| 50 | |
Chris Lattner | 3cbfe2c | 2008-11-22 00:59:29 +0000 | [diff] [blame] | 51 | DiagnosticBuilder Parser::Diag(const Token &Tok, unsigned DiagID) { |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 52 | return Diag(Tok.getLocation(), DiagID); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 53 | } |
| 54 | |
| 55 | /// MatchRHSPunctuation - For punctuation with a LHS and RHS (e.g. '['/']'), |
| 56 | /// this helper function matches and consumes the specified RHS token if |
| 57 | /// present. If not present, it emits the specified diagnostic indicating |
| 58 | /// that the parser failed to match the RHS of the token at LHSLoc. LHSName |
| 59 | /// should be the name of the unmatched LHS token. |
| 60 | SourceLocation Parser::MatchRHSPunctuation(tok::TokenKind RHSTok, |
| 61 | SourceLocation LHSLoc) { |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 62 | |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 63 | if (Tok.is(RHSTok)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 64 | return ConsumeAnyToken(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 65 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 66 | SourceLocation R = Tok.getLocation(); |
| 67 | const char *LHSName = "unknown"; |
| 68 | diag::kind DID = diag::err_parse_error; |
| 69 | switch (RHSTok) { |
| 70 | default: break; |
| 71 | case tok::r_paren : LHSName = "("; DID = diag::err_expected_rparen; break; |
| 72 | case tok::r_brace : LHSName = "{"; DID = diag::err_expected_rbrace; break; |
| 73 | case tok::r_square: LHSName = "["; DID = diag::err_expected_rsquare; break; |
| 74 | case tok::greater: LHSName = "<"; DID = diag::err_expected_greater; break; |
| 75 | } |
| 76 | Diag(Tok, DID); |
Chris Lattner | 28eb7e9 | 2008-11-23 23:17:07 +0000 | [diff] [blame] | 77 | Diag(LHSLoc, diag::note_matching) << LHSName; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 78 | SkipUntil(RHSTok); |
| 79 | return R; |
| 80 | } |
| 81 | |
| 82 | /// ExpectAndConsume - The parser expects that 'ExpectedTok' is next in the |
| 83 | /// input. If so, it is consumed and false is returned. |
| 84 | /// |
| 85 | /// If the input is malformed, this emits the specified diagnostic. Next, if |
| 86 | /// SkipToTok is specified, it calls SkipUntil(SkipToTok). Finally, true is |
| 87 | /// returned. |
| 88 | bool Parser::ExpectAndConsume(tok::TokenKind ExpectedTok, unsigned DiagID, |
| 89 | const char *Msg, tok::TokenKind SkipToTok) { |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 90 | if (Tok.is(ExpectedTok)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 91 | ConsumeAnyToken(); |
| 92 | return false; |
| 93 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 94 | |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 95 | Diag(Tok, DiagID) << Msg; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 96 | if (SkipToTok != tok::unknown) |
| 97 | SkipUntil(SkipToTok); |
| 98 | return true; |
| 99 | } |
| 100 | |
| 101 | //===----------------------------------------------------------------------===// |
| 102 | // Error recovery. |
| 103 | //===----------------------------------------------------------------------===// |
| 104 | |
| 105 | /// SkipUntil - Read tokens until we get to the specified token, then consume |
Chris Lattner | 012cf46 | 2007-07-24 17:03:04 +0000 | [diff] [blame] | 106 | /// it (unless DontConsume is true). Because we cannot guarantee that the |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 107 | /// token will ever occur, this skips to the next token, or to some likely |
| 108 | /// good stopping point. If StopAtSemi is true, skipping will stop at a ';' |
| 109 | /// character. |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 110 | /// |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 111 | /// If SkipUntil finds the specified token, it returns true, otherwise it |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 112 | /// returns false. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 113 | bool Parser::SkipUntil(const tok::TokenKind *Toks, unsigned NumToks, |
| 114 | bool StopAtSemi, bool DontConsume) { |
| 115 | // We always want this function to skip at least one token if the first token |
| 116 | // isn't T and if not at EOF. |
| 117 | bool isFirstTokenSkipped = true; |
| 118 | while (1) { |
| 119 | // If we found one of the tokens, stop and return true. |
| 120 | for (unsigned i = 0; i != NumToks; ++i) { |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 121 | if (Tok.is(Toks[i])) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 122 | if (DontConsume) { |
| 123 | // Noop, don't consume the token. |
| 124 | } else { |
| 125 | ConsumeAnyToken(); |
| 126 | } |
| 127 | return true; |
| 128 | } |
| 129 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 130 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 131 | switch (Tok.getKind()) { |
| 132 | case tok::eof: |
| 133 | // Ran out of tokens. |
| 134 | return false; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 135 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 136 | case tok::l_paren: |
| 137 | // Recursively skip properly-nested parens. |
| 138 | ConsumeParen(); |
| 139 | SkipUntil(tok::r_paren, false); |
| 140 | break; |
| 141 | case tok::l_square: |
| 142 | // Recursively skip properly-nested square brackets. |
| 143 | ConsumeBracket(); |
| 144 | SkipUntil(tok::r_square, false); |
| 145 | break; |
| 146 | case tok::l_brace: |
| 147 | // Recursively skip properly-nested braces. |
| 148 | ConsumeBrace(); |
| 149 | SkipUntil(tok::r_brace, false); |
| 150 | break; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 151 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 152 | // Okay, we found a ']' or '}' or ')', which we think should be balanced. |
| 153 | // Since the user wasn't looking for this token (if they were, it would |
| 154 | // already be handled), this isn't balanced. If there is a LHS token at a |
| 155 | // higher level, we will assume that this matches the unbalanced token |
| 156 | // and return it. Otherwise, this is a spurious RHS token, which we skip. |
| 157 | case tok::r_paren: |
| 158 | if (ParenCount && !isFirstTokenSkipped) |
| 159 | return false; // Matches something. |
| 160 | ConsumeParen(); |
| 161 | break; |
| 162 | case tok::r_square: |
| 163 | if (BracketCount && !isFirstTokenSkipped) |
| 164 | return false; // Matches something. |
| 165 | ConsumeBracket(); |
| 166 | break; |
| 167 | case tok::r_brace: |
| 168 | if (BraceCount && !isFirstTokenSkipped) |
| 169 | return false; // Matches something. |
| 170 | ConsumeBrace(); |
| 171 | break; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 172 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 173 | case tok::string_literal: |
| 174 | case tok::wide_string_literal: |
| 175 | ConsumeStringToken(); |
| 176 | break; |
| 177 | case tok::semi: |
| 178 | if (StopAtSemi) |
| 179 | return false; |
| 180 | // FALL THROUGH. |
| 181 | default: |
| 182 | // Skip this token. |
| 183 | ConsumeToken(); |
| 184 | break; |
| 185 | } |
| 186 | isFirstTokenSkipped = 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 | } |
| 189 | |
| 190 | //===----------------------------------------------------------------------===// |
| 191 | // Scope manipulation |
| 192 | //===----------------------------------------------------------------------===// |
| 193 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 194 | /// EnterScope - Start a new scope. |
| 195 | void Parser::EnterScope(unsigned ScopeFlags) { |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 196 | if (NumCachedScopes) { |
| 197 | Scope *N = ScopeCache[--NumCachedScopes]; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 198 | N->Init(CurScope, ScopeFlags); |
| 199 | CurScope = N; |
| 200 | } else { |
| 201 | CurScope = new Scope(CurScope, ScopeFlags); |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | /// ExitScope - Pop a scope off the scope stack. |
| 206 | void Parser::ExitScope() { |
| 207 | assert(CurScope && "Scope imbalance!"); |
| 208 | |
Chris Lattner | 90ae68a | 2007-10-09 20:37:18 +0000 | [diff] [blame] | 209 | // Inform the actions module that this scope is going away if there are any |
| 210 | // decls in it. |
| 211 | if (!CurScope->decl_empty()) |
Steve Naroff | b216c88 | 2007-10-09 22:01:59 +0000 | [diff] [blame] | 212 | Actions.ActOnPopScope(Tok.getLocation(), CurScope); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 213 | |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 214 | Scope *OldScope = CurScope; |
| 215 | CurScope = OldScope->getParent(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 216 | |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 217 | if (NumCachedScopes == ScopeCacheSize) |
| 218 | delete OldScope; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 219 | else |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 220 | ScopeCache[NumCachedScopes++] = OldScope; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | |
| 224 | |
| 225 | |
| 226 | //===----------------------------------------------------------------------===// |
| 227 | // C99 6.9: External Definitions. |
| 228 | //===----------------------------------------------------------------------===// |
| 229 | |
| 230 | Parser::~Parser() { |
| 231 | // If we still have scopes active, delete the scope tree. |
| 232 | delete CurScope; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 233 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 234 | // Free the scope cache. |
Chris Lattner | 9e344c6 | 2007-07-15 00:04:39 +0000 | [diff] [blame] | 235 | for (unsigned i = 0, e = NumCachedScopes; i != e; ++i) |
| 236 | delete ScopeCache[i]; |
Daniel Dunbar | fcdd8fe | 2008-10-04 19:21:03 +0000 | [diff] [blame] | 237 | |
| 238 | // Remove the pragma handlers we installed. |
| 239 | PP.RemovePragmaHandler(0, PackHandler); |
| 240 | delete PackHandler; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 241 | } |
| 242 | |
| 243 | /// Initialize - Warm up the parser. |
| 244 | /// |
| 245 | void Parser::Initialize() { |
| 246 | // Prime the lexer look-ahead. |
| 247 | ConsumeToken(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 248 | |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 249 | // Create the translation unit scope. Install it as the current scope. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 250 | assert(CurScope == 0 && "A scope is already active?"); |
Chris Lattner | 31e0572 | 2007-08-26 06:24:45 +0000 | [diff] [blame] | 251 | EnterScope(Scope::DeclScope); |
Steve Naroff | b216c88 | 2007-10-09 22:01:59 +0000 | [diff] [blame] | 252 | Actions.ActOnTranslationUnitScope(Tok.getLocation(), CurScope); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 253 | |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 254 | if (Tok.is(tok::eof) && |
Chris Lattner | f726175 | 2007-08-25 05:47:03 +0000 | [diff] [blame] | 255 | !getLang().CPlusPlus) // Empty source file is an extension in C |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 256 | Diag(Tok, diag::ext_empty_source_file); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 257 | |
Chris Lattner | 34870da | 2007-08-29 22:54:08 +0000 | [diff] [blame] | 258 | // Initialization for Objective-C context sensitive keywords recognition. |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 259 | // Referenced in Parser::ParseObjCTypeQualifierList. |
Chris Lattner | 34870da | 2007-08-29 22:54:08 +0000 | [diff] [blame] | 260 | if (getLang().ObjC1) { |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 261 | ObjCTypeQuals[objc_in] = &PP.getIdentifierTable().get("in"); |
| 262 | ObjCTypeQuals[objc_out] = &PP.getIdentifierTable().get("out"); |
| 263 | ObjCTypeQuals[objc_inout] = &PP.getIdentifierTable().get("inout"); |
| 264 | ObjCTypeQuals[objc_oneway] = &PP.getIdentifierTable().get("oneway"); |
| 265 | ObjCTypeQuals[objc_bycopy] = &PP.getIdentifierTable().get("bycopy"); |
| 266 | ObjCTypeQuals[objc_byref] = &PP.getIdentifierTable().get("byref"); |
Chris Lattner | 34870da | 2007-08-29 22:54:08 +0000 | [diff] [blame] | 267 | } |
Daniel Dunbar | 662e8b5 | 2008-08-14 22:04:54 +0000 | [diff] [blame] | 268 | |
| 269 | Ident_super = &PP.getIdentifierTable().get("super"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 270 | } |
| 271 | |
| 272 | /// ParseTopLevelDecl - Parse one top-level declaration, return whatever the |
| 273 | /// action tells us to. This returns true if the EOF was encountered. |
Steve Naroff | 89307ff | 2007-11-29 23:05:20 +0000 | [diff] [blame] | 274 | bool Parser::ParseTopLevelDecl(DeclTy*& Result) { |
| 275 | Result = 0; |
Chris Lattner | 9299f3f | 2008-08-23 03:19:52 +0000 | [diff] [blame] | 276 | if (Tok.is(tok::eof)) { |
| 277 | Actions.ActOnEndOfTranslationUnit(); |
| 278 | return true; |
| 279 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 280 | |
Steve Naroff | 89307ff | 2007-11-29 23:05:20 +0000 | [diff] [blame] | 281 | Result = ParseExternalDeclaration(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 282 | return false; |
| 283 | } |
| 284 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 285 | /// ParseTranslationUnit: |
| 286 | /// translation-unit: [C99 6.9] |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 287 | /// external-declaration |
| 288 | /// translation-unit external-declaration |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 289 | void Parser::ParseTranslationUnit() { |
Douglas Gregor | 8935b8b | 2008-12-10 06:34:36 +0000 | [diff] [blame] | 290 | Initialize(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 291 | |
Steve Naroff | 89307ff | 2007-11-29 23:05:20 +0000 | [diff] [blame] | 292 | DeclTy *Res; |
| 293 | while (!ParseTopLevelDecl(Res)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 294 | /*parse them all*/; |
Chris Lattner | 06f5485 | 2008-08-23 02:00:52 +0000 | [diff] [blame] | 295 | |
| 296 | ExitScope(); |
| 297 | assert(CurScope == 0 && "Scope imbalance!"); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | /// ParseExternalDeclaration: |
Chris Lattner | 90b93d6 | 2008-12-08 21:59:01 +0000 | [diff] [blame] | 301 | /// |
Douglas Gregor | c19923d | 2008-11-21 16:10:08 +0000 | [diff] [blame] | 302 | /// external-declaration: [C99 6.9], declaration: [C++ dcl.dcl] |
Chris Lattner | c301815 | 2007-08-10 20:57:02 +0000 | [diff] [blame] | 303 | /// function-definition |
| 304 | /// declaration |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 305 | /// [EXT] ';' |
| 306 | /// [GNU] asm-definition |
Chris Lattner | c301815 | 2007-08-10 20:57:02 +0000 | [diff] [blame] | 307 | /// [GNU] __extension__ external-declaration |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 308 | /// [OBJC] objc-class-definition |
| 309 | /// [OBJC] objc-class-declaration |
| 310 | /// [OBJC] objc-alias-declaration |
| 311 | /// [OBJC] objc-protocol-definition |
| 312 | /// [OBJC] objc-method-definition |
| 313 | /// [OBJC] @end |
Douglas Gregor | c19923d | 2008-11-21 16:10:08 +0000 | [diff] [blame] | 314 | /// [C++] linkage-specification |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 315 | /// [GNU] asm-definition: |
| 316 | /// simple-asm-expr ';' |
| 317 | /// |
| 318 | Parser::DeclTy *Parser::ParseExternalDeclaration() { |
| 319 | switch (Tok.getKind()) { |
| 320 | case tok::semi: |
| 321 | Diag(Tok, diag::ext_top_level_semi); |
| 322 | ConsumeToken(); |
| 323 | // TODO: Invoke action for top-level semicolon. |
| 324 | return 0; |
Chris Lattner | 90b93d6 | 2008-12-08 21:59:01 +0000 | [diff] [blame] | 325 | case tok::r_brace: |
| 326 | Diag(Tok, diag::err_expected_external_declaration); |
| 327 | ConsumeBrace(); |
| 328 | return 0; |
| 329 | case tok::eof: |
| 330 | Diag(Tok, diag::err_expected_external_declaration); |
| 331 | return 0; |
Chris Lattner | c301815 | 2007-08-10 20:57:02 +0000 | [diff] [blame] | 332 | case tok::kw___extension__: { |
Chris Lattner | c46d1a1 | 2008-10-20 06:45:43 +0000 | [diff] [blame] | 333 | // __extension__ silences extension warnings in the subexpression. |
| 334 | ExtensionRAIIObject O(Diags); // Use RAII to do this. |
Chris Lattner | 39146d6 | 2008-10-20 06:51:33 +0000 | [diff] [blame] | 335 | ConsumeToken(); |
Chris Lattner | c46d1a1 | 2008-10-20 06:45:43 +0000 | [diff] [blame] | 336 | return ParseExternalDeclaration(); |
Chris Lattner | c301815 | 2007-08-10 20:57:02 +0000 | [diff] [blame] | 337 | } |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 338 | case tok::kw_asm: { |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 339 | OwningExprResult Result(ParseSimpleAsm()); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 340 | |
Anders Carlsson | 3f9424f | 2008-02-08 00:23:11 +0000 | [diff] [blame] | 341 | ExpectAndConsume(tok::semi, diag::err_expected_semi_after, |
| 342 | "top-level asm block"); |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 343 | |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 344 | if (!Result.isInvalid()) |
Sebastian Redl | 798d119 | 2008-12-13 16:23:55 +0000 | [diff] [blame] | 345 | return Actions.ActOnFileScopeAsmDecl(Tok.getLocation(), |
| 346 | move_convert(Result)); |
Chris Lattner | aec3a1e | 2008-05-27 23:32:43 +0000 | [diff] [blame] | 347 | return 0; |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 348 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 349 | case tok::at: |
| 350 | // @ is not a legal token unless objc is enabled, no need to check. |
Steve Naroff | 2bd42fa | 2007-09-10 20:51:04 +0000 | [diff] [blame] | 351 | return ParseObjCAtDirectives(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 352 | case tok::minus: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 353 | case tok::plus: |
Fariborz Jahanian | 60fbca0 | 2007-11-10 16:31:34 +0000 | [diff] [blame] | 354 | if (getLang().ObjC1) |
Steve Naroff | 71c0a95 | 2007-11-13 23:01:27 +0000 | [diff] [blame] | 355 | return ParseObjCMethodDefinition(); |
Fariborz Jahanian | 60fbca0 | 2007-11-10 16:31:34 +0000 | [diff] [blame] | 356 | else { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 357 | Diag(Tok, diag::err_expected_external_declaration); |
| 358 | ConsumeToken(); |
| 359 | } |
| 360 | return 0; |
Chris Lattner | 8f08cb7 | 2007-08-25 06:57:03 +0000 | [diff] [blame] | 361 | case tok::kw_namespace: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 362 | case tok::kw_typedef: |
Douglas Gregor | adcac88 | 2008-12-01 23:54:00 +0000 | [diff] [blame] | 363 | case tok::kw_template: |
| 364 | case tok::kw_export: // As in 'export template' |
Chris Lattner | bae3511 | 2007-08-25 18:15:16 +0000 | [diff] [blame] | 365 | // A function definition cannot start with a these keywords. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 366 | return ParseDeclaration(Declarator::FileContext); |
Chris Lattner | 90b93d6 | 2008-12-08 21:59:01 +0000 | [diff] [blame] | 367 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 368 | default: |
| 369 | // We can't tell whether this is a function-definition or declaration yet. |
| 370 | return ParseDeclarationOrFunctionDefinition(); |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | /// ParseDeclarationOrFunctionDefinition - Parse either a function-definition or |
| 375 | /// a declaration. We can't tell which we have until we read up to the |
| 376 | /// compound-statement in function-definition. |
| 377 | /// |
| 378 | /// function-definition: [C99 6.9.1] |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 379 | /// decl-specs declarator declaration-list[opt] compound-statement |
| 380 | /// [C90] function-definition: [C99 6.7.1] - implicit int result |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 381 | /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 382 | /// |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 383 | /// declaration: [C99 6.7] |
Chris Lattner | 697e15f | 2007-08-22 06:06:56 +0000 | [diff] [blame] | 384 | /// declaration-specifiers init-declarator-list[opt] ';' |
| 385 | /// [!C99] init-declarator-list ';' [TODO: warn in c99 mode] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 386 | /// [OMP] threadprivate-directive [TODO] |
| 387 | /// |
| 388 | Parser::DeclTy *Parser::ParseDeclarationOrFunctionDefinition() { |
| 389 | // Parse the common declaration-specifiers piece. |
| 390 | DeclSpec DS; |
| 391 | ParseDeclarationSpecifiers(DS); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 392 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 393 | // C99 6.7.2.3p6: Handle "struct-or-union identifier;", "enum { X };" |
| 394 | // declaration-specifiers init-declarator-list[opt] ';' |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 395 | if (Tok.is(tok::semi)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 396 | ConsumeToken(); |
| 397 | return Actions.ParsedFreeStandingDeclSpec(CurScope, DS); |
| 398 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 399 | |
Daniel Dunbar | 246e70f | 2008-09-26 04:48:09 +0000 | [diff] [blame] | 400 | // ObjC2 allows prefix attributes on class interfaces and protocols. |
| 401 | // FIXME: This still needs better diagnostics. We should only accept |
| 402 | // attributes here, no types, etc. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 403 | if (getLang().ObjC2 && Tok.is(tok::at)) { |
Steve Naroff | dac269b | 2007-08-20 21:31:48 +0000 | [diff] [blame] | 404 | SourceLocation AtLoc = ConsumeToken(); // the "@" |
Daniel Dunbar | 246e70f | 2008-09-26 04:48:09 +0000 | [diff] [blame] | 405 | if (!Tok.isObjCAtKeyword(tok::objc_interface) && |
| 406 | !Tok.isObjCAtKeyword(tok::objc_protocol)) { |
| 407 | Diag(Tok, diag::err_objc_unexpected_attr); |
Chris Lattner | cb53b36 | 2007-12-27 19:57:00 +0000 | [diff] [blame] | 408 | SkipUntil(tok::semi); // FIXME: better skip? |
| 409 | return 0; |
| 410 | } |
Fariborz Jahanian | 0de2ae2 | 2008-01-02 19:17:38 +0000 | [diff] [blame] | 411 | const char *PrevSpec = 0; |
| 412 | if (DS.SetTypeSpecType(DeclSpec::TST_unspecified, AtLoc, PrevSpec)) |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 413 | Diag(AtLoc, diag::err_invalid_decl_spec_combination) << PrevSpec; |
Daniel Dunbar | 246e70f | 2008-09-26 04:48:09 +0000 | [diff] [blame] | 414 | if (Tok.isObjCAtKeyword(tok::objc_protocol)) |
| 415 | return ParseObjCAtProtocolDeclaration(AtLoc, DS.getAttributes()); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 416 | return ParseObjCAtInterfaceDeclaration(AtLoc, DS.getAttributes()); |
Steve Naroff | dac269b | 2007-08-20 21:31:48 +0000 | [diff] [blame] | 417 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 418 | |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 419 | // If the declspec consisted only of 'extern' and we have a string |
| 420 | // literal following it, this must be a C++ linkage specifier like |
| 421 | // 'extern "C"'. |
Chris Lattner | 3c6f6a7 | 2008-01-12 07:08:43 +0000 | [diff] [blame] | 422 | if (Tok.is(tok::string_literal) && getLang().CPlusPlus && |
Chris Lattner | c6fdc34 | 2008-01-12 07:05:38 +0000 | [diff] [blame] | 423 | DS.getStorageClassSpec() == DeclSpec::SCS_extern && |
| 424 | DS.getParsedSpecifiers() == DeclSpec::PQ_StorageClassSpecifier) |
| 425 | return ParseLinkage(Declarator::FileContext); |
| 426 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 427 | // Parse the first declarator. |
| 428 | Declarator DeclaratorInfo(DS, Declarator::FileContext); |
| 429 | ParseDeclarator(DeclaratorInfo); |
| 430 | // Error parsing the declarator? |
Douglas Gregor | 10bd368 | 2008-11-17 22:58:34 +0000 | [diff] [blame] | 431 | if (!DeclaratorInfo.hasName()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 432 | // If so, skip until the semi-colon or a }. |
Douglas Gregor | cb43d99 | 2008-12-01 23:03:32 +0000 | [diff] [blame] | 433 | SkipUntil(tok::r_brace, true, true); |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 434 | if (Tok.is(tok::semi)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 435 | ConsumeToken(); |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | // If the declarator is the start of a function definition, handle it. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 440 | if (Tok.is(tok::equal) || // int X()= -> not a function def |
| 441 | Tok.is(tok::comma) || // int X(), -> not a function def |
| 442 | Tok.is(tok::semi) || // int X(); -> not a function def |
| 443 | Tok.is(tok::kw_asm) || // int X() __asm__ -> not a function def |
Argyrios Kyrtzidis | 73a0d88 | 2008-10-06 17:10:33 +0000 | [diff] [blame] | 444 | Tok.is(tok::kw___attribute) || // int X() __attr__ -> not a function def |
| 445 | (getLang().CPlusPlus && |
| 446 | Tok.is(tok::l_paren)) ) { // int X(0) -> not a function def [C++] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 447 | // FALL THROUGH. |
| 448 | } else if (DeclaratorInfo.isFunctionDeclarator() && |
Argyrios Kyrtzidis | cf28c72 | 2008-06-21 10:00:56 +0000 | [diff] [blame] | 449 | (Tok.is(tok::l_brace) || // int X() {} |
| 450 | ( !getLang().CPlusPlus && |
| 451 | isDeclarationSpecifier() ))) { // int X(f) int f; {} |
Steve Naroff | e39bfd0 | 2008-02-14 02:58:32 +0000 | [diff] [blame] | 452 | if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { |
| 453 | Diag(Tok, diag::err_function_declared_typedef); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 454 | |
Steve Naroff | e39bfd0 | 2008-02-14 02:58:32 +0000 | [diff] [blame] | 455 | if (Tok.is(tok::l_brace)) { |
| 456 | // This recovery skips the entire function body. It would be nice |
Douglas Gregor | 72c3f31 | 2008-12-05 18:15:24 +0000 | [diff] [blame] | 457 | // to simply call ParseFunctionDefinition() below, however Sema |
Steve Naroff | e39bfd0 | 2008-02-14 02:58:32 +0000 | [diff] [blame] | 458 | // assumes the declarator represents a function, not a typedef. |
| 459 | ConsumeBrace(); |
| 460 | SkipUntil(tok::r_brace, true); |
| 461 | } else { |
| 462 | SkipUntil(tok::semi); |
| 463 | } |
| 464 | return 0; |
| 465 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 466 | return ParseFunctionDefinition(DeclaratorInfo); |
| 467 | } else { |
| 468 | if (DeclaratorInfo.isFunctionDeclarator()) |
| 469 | Diag(Tok, diag::err_expected_fn_body); |
| 470 | else |
| 471 | Diag(Tok, diag::err_expected_after_declarator); |
| 472 | SkipUntil(tok::semi); |
| 473 | return 0; |
| 474 | } |
| 475 | |
| 476 | // Parse the init-declarator-list for a normal declaration. |
| 477 | return ParseInitDeclaratorListAfterFirstDeclarator(DeclaratorInfo); |
| 478 | } |
| 479 | |
| 480 | /// ParseFunctionDefinition - We parsed and verified that the specified |
| 481 | /// Declarator is well formed. If this is a K&R-style function, read the |
| 482 | /// parameters declaration-list, then start the compound-statement. |
| 483 | /// |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 484 | /// function-definition: [C99 6.9.1] |
| 485 | /// decl-specs declarator declaration-list[opt] compound-statement |
| 486 | /// [C90] function-definition: [C99 6.7.1] - implicit int result |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 487 | /// [C90] decl-specs[opt] declarator declaration-list[opt] compound-statement |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 488 | /// [C++] function-definition: [C++ 8.4] |
| 489 | /// decl-specifier-seq[opt] declarator ctor-initializer[opt] function-body |
| 490 | /// [C++] function-definition: [C++ 8.4] |
| 491 | /// decl-specifier-seq[opt] declarator function-try-block [TODO] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 492 | /// |
| 493 | Parser::DeclTy *Parser::ParseFunctionDefinition(Declarator &D) { |
| 494 | const DeclaratorChunk &FnTypeInfo = D.getTypeObject(0); |
| 495 | assert(FnTypeInfo.Kind == DeclaratorChunk::Function && |
| 496 | "This isn't a function declarator!"); |
| 497 | const DeclaratorChunk::FunctionTypeInfo &FTI = FnTypeInfo.Fun; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 498 | |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 499 | // If this is C90 and the declspecs were completely missing, fudge in an |
| 500 | // implicit int. We do this here because this is the only place where |
| 501 | // declaration-specifiers are completely optional in the grammar. |
Chris Lattner | d658b56 | 2008-04-05 06:32:51 +0000 | [diff] [blame] | 502 | if (getLang().ImplicitInt && D.getDeclSpec().getParsedSpecifiers() == 0) { |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 503 | const char *PrevSpec; |
Chris Lattner | 31c2868 | 2008-10-20 02:01:34 +0000 | [diff] [blame] | 504 | D.getMutableDeclSpec().SetTypeSpecType(DeclSpec::TST_int, |
| 505 | D.getIdentifierLoc(), |
| 506 | PrevSpec); |
Chris Lattner | a798ebc | 2008-04-05 05:52:15 +0000 | [diff] [blame] | 507 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 508 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 509 | // If this declaration was formed with a K&R-style identifier list for the |
| 510 | // arguments, parse declarations for all of the args next. |
| 511 | // int foo(a,b) int a; float b; {} |
| 512 | if (!FTI.hasPrototype && FTI.NumArgs != 0) |
| 513 | ParseKNRParamDeclarations(D); |
| 514 | |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 515 | // We should have either an opening brace or, in a C++ constructor, |
| 516 | // we may have a colon. |
Sebastian Redl | 618e5c0 | 2008-11-24 21:45:59 +0000 | [diff] [blame] | 517 | // FIXME: In C++, we might also find the 'try' keyword. |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 518 | if (Tok.isNot(tok::l_brace) && Tok.isNot(tok::colon)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 519 | Diag(Tok, diag::err_expected_fn_body); |
| 520 | |
| 521 | // Skip over garbage, until we get to '{'. Don't eat the '{'. |
| 522 | SkipUntil(tok::l_brace, true, true); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 523 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 524 | // If we didn't find the '{', bail out. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 525 | if (Tok.isNot(tok::l_brace)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 526 | return 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 527 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 528 | |
Chris Lattner | b652cea | 2007-10-09 17:14:05 +0000 | [diff] [blame] | 529 | // Enter a scope for the function body. |
Douglas Gregor | 8935b8b | 2008-12-10 06:34:36 +0000 | [diff] [blame] | 530 | ParseScope BodyScope(this, Scope::FnScope|Scope::DeclScope); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 531 | |
Chris Lattner | b652cea | 2007-10-09 17:14:05 +0000 | [diff] [blame] | 532 | // Tell the actions module that we have entered a function definition with the |
| 533 | // specified Declarator for the function. |
| 534 | DeclTy *Res = Actions.ActOnStartOfFunctionDef(CurScope, D); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 535 | |
Douglas Gregor | 7ad8390 | 2008-11-05 04:29:56 +0000 | [diff] [blame] | 536 | // If we have a colon, then we're probably parsing a C++ |
| 537 | // ctor-initializer. |
| 538 | if (Tok.is(tok::colon)) |
| 539 | ParseConstructorInitializer(Res); |
| 540 | |
| 541 | SourceLocation BraceLoc = Tok.getLocation(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 542 | return ParseFunctionStatementBody(Res, BraceLoc, BraceLoc); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | /// ParseKNRParamDeclarations - Parse 'declaration-list[opt]' which provides |
| 546 | /// types for a function with a K&R-style identifier list for arguments. |
| 547 | void Parser::ParseKNRParamDeclarations(Declarator &D) { |
| 548 | // We know that the top-level of this declarator is a function. |
| 549 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(0).Fun; |
| 550 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 551 | // Enter function-declaration scope, limiting any declarators to the |
| 552 | // function prototype scope, including parameter declarators. |
Douglas Gregor | 8935b8b | 2008-12-10 06:34:36 +0000 | [diff] [blame] | 553 | ParseScope PrototypeScope(this, Scope::FnScope|Scope::DeclScope); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 554 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 555 | // Read all the argument declarations. |
| 556 | while (isDeclarationSpecifier()) { |
| 557 | SourceLocation DSStart = Tok.getLocation(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 558 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 559 | // Parse the common declaration-specifiers piece. |
| 560 | DeclSpec DS; |
| 561 | ParseDeclarationSpecifiers(DS); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 562 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 563 | // C99 6.9.1p6: 'each declaration in the declaration list shall have at |
| 564 | // least one declarator'. |
| 565 | // NOTE: GCC just makes this an ext-warn. It's not clear what it does with |
| 566 | // the declarations though. It's trivial to ignore them, really hard to do |
| 567 | // anything else with them. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 568 | if (Tok.is(tok::semi)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 569 | Diag(DSStart, diag::err_declaration_does_not_declare_param); |
| 570 | ConsumeToken(); |
| 571 | continue; |
| 572 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 573 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 574 | // C99 6.9.1p6: Declarations shall contain no storage-class specifiers other |
| 575 | // than register. |
| 576 | if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && |
| 577 | DS.getStorageClassSpec() != DeclSpec::SCS_register) { |
| 578 | Diag(DS.getStorageClassSpecLoc(), |
| 579 | diag::err_invalid_storage_class_in_func_decl); |
| 580 | DS.ClearStorageClassSpecs(); |
| 581 | } |
| 582 | if (DS.isThreadSpecified()) { |
| 583 | Diag(DS.getThreadSpecLoc(), |
| 584 | diag::err_invalid_storage_class_in_func_decl); |
| 585 | DS.ClearStorageClassSpecs(); |
| 586 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 587 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 588 | // Parse the first declarator attached to this declspec. |
| 589 | Declarator ParmDeclarator(DS, Declarator::KNRTypeListContext); |
| 590 | ParseDeclarator(ParmDeclarator); |
| 591 | |
| 592 | // Handle the full declarator list. |
| 593 | while (1) { |
| 594 | DeclTy *AttrList; |
| 595 | // If attributes are present, parse them. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 596 | if (Tok.is(tok::kw___attribute)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 597 | // FIXME: attach attributes too. |
| 598 | AttrList = ParseAttributes(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 599 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 600 | // Ask the actions module to compute the type for this declarator. |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 601 | Action::DeclTy *Param = |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 602 | Actions.ActOnParamDeclarator(CurScope, ParmDeclarator); |
Steve Naroff | 2bd42fa | 2007-09-10 20:51:04 +0000 | [diff] [blame] | 603 | |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 604 | if (Param && |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 605 | // A missing identifier has already been diagnosed. |
| 606 | ParmDeclarator.getIdentifier()) { |
| 607 | |
| 608 | // Scan the argument list looking for the correct param to apply this |
| 609 | // type. |
| 610 | for (unsigned i = 0; ; ++i) { |
| 611 | // C99 6.9.1p6: those declarators shall declare only identifiers from |
| 612 | // the identifier list. |
| 613 | if (i == FTI.NumArgs) { |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 614 | Diag(ParmDeclarator.getIdentifierLoc(), diag::err_no_matching_param) |
Chris Lattner | 6898e33 | 2008-11-19 07:51:13 +0000 | [diff] [blame] | 615 | << ParmDeclarator.getIdentifier(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 616 | break; |
| 617 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 618 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 619 | if (FTI.ArgInfo[i].Ident == ParmDeclarator.getIdentifier()) { |
| 620 | // Reject redefinitions of parameters. |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 621 | if (FTI.ArgInfo[i].Param) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 622 | Diag(ParmDeclarator.getIdentifierLoc(), |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 623 | diag::err_param_redefinition) |
Chris Lattner | 6898e33 | 2008-11-19 07:51:13 +0000 | [diff] [blame] | 624 | << ParmDeclarator.getIdentifier(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 625 | } else { |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 626 | FTI.ArgInfo[i].Param = Param; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 627 | } |
| 628 | break; |
| 629 | } |
| 630 | } |
| 631 | } |
| 632 | |
| 633 | // If we don't have a comma, it is either the end of the list (a ';') or |
| 634 | // an error, bail out. |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 635 | if (Tok.isNot(tok::comma)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 636 | break; |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 637 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 638 | // Consume the comma. |
| 639 | ConsumeToken(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 640 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 641 | // Parse the next declarator. |
| 642 | ParmDeclarator.clear(); |
| 643 | ParseDeclarator(ParmDeclarator); |
| 644 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 645 | |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 646 | if (Tok.is(tok::semi)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 647 | ConsumeToken(); |
| 648 | } else { |
| 649 | Diag(Tok, diag::err_parse_error); |
| 650 | // Skip to end of block or statement |
| 651 | SkipUntil(tok::semi, true); |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 652 | if (Tok.is(tok::semi)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 653 | ConsumeToken(); |
| 654 | } |
| 655 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 656 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 657 | // The actions module must verify that all arguments were declared. |
| 658 | } |
| 659 | |
| 660 | |
| 661 | /// ParseAsmStringLiteral - This is just a normal string-literal, but is not |
| 662 | /// allowed to be a wide string, and is not subject to character translation. |
| 663 | /// |
| 664 | /// [GNU] asm-string-literal: |
| 665 | /// string-literal |
| 666 | /// |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 667 | Parser::OwningExprResult Parser::ParseAsmStringLiteral() { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 668 | if (!isTokenStringLiteral()) { |
| 669 | Diag(Tok, diag::err_expected_string_literal); |
Sebastian Redl | 61364dd | 2008-12-11 19:30:53 +0000 | [diff] [blame] | 670 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 671 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 672 | |
Sebastian Redl | 20df9b7 | 2008-12-11 22:51:44 +0000 | [diff] [blame] | 673 | OwningExprResult Res(ParseStringLiteralExpression()); |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 674 | if (Res.isInvalid()) return move(Res); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 675 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 676 | // TODO: Diagnose: wide string literal in 'asm' |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 677 | |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 678 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 679 | } |
| 680 | |
| 681 | /// ParseSimpleAsm |
| 682 | /// |
| 683 | /// [GNU] simple-asm-expr: |
| 684 | /// 'asm' '(' asm-string-literal ')' |
| 685 | /// |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 686 | Parser::OwningExprResult Parser::ParseSimpleAsm() { |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 687 | assert(Tok.is(tok::kw_asm) && "Not an asm!"); |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 688 | SourceLocation Loc = ConsumeToken(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 689 | |
Chris Lattner | 0007322 | 2007-10-09 17:23:58 +0000 | [diff] [blame] | 690 | if (Tok.isNot(tok::l_paren)) { |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 691 | Diag(Tok, diag::err_expected_lparen_after) << "asm"; |
Sebastian Redl | 61364dd | 2008-12-11 19:30:53 +0000 | [diff] [blame] | 692 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 693 | } |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 694 | |
Anders Carlsson | dfab6cb | 2008-02-08 00:33:21 +0000 | [diff] [blame] | 695 | ConsumeParen(); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 696 | |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 697 | OwningExprResult Result(ParseAsmStringLiteral()); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 698 | |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 699 | if (Result.isInvalid()) |
Daniel Dunbar | a80f874 | 2008-08-05 01:35:17 +0000 | [diff] [blame] | 700 | SkipUntil(tok::r_paren); |
Chris Lattner | 8f5421a | 2008-10-20 07:36:58 +0000 | [diff] [blame] | 701 | else |
Daniel Dunbar | a80f874 | 2008-08-05 01:35:17 +0000 | [diff] [blame] | 702 | MatchRHSPunctuation(tok::r_paren, Loc); |
Mike Stump | a6f0177 | 2008-06-19 19:28:49 +0000 | [diff] [blame] | 703 | |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 704 | return move(Result); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 705 | } |
| 706 | |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 707 | /// TryAnnotateTypeOrScopeToken - If the current token position is on a |
| 708 | /// typename (possibly qualified in C++) or a C++ scope specifier not followed |
| 709 | /// by a typename, TryAnnotateTypeOrScopeToken will replace one or more tokens |
| 710 | /// with a single annotation token representing the typename or C++ scope |
| 711 | /// respectively. |
| 712 | /// This simplifies handling of C++ scope specifiers and allows efficient |
| 713 | /// backtracking without the need to re-parse and resolve nested-names and |
| 714 | /// typenames. |
Argyrios Kyrtzidis | 44802cc | 2008-11-26 21:51:07 +0000 | [diff] [blame] | 715 | /// It will mainly be called when we expect to treat identifiers as typenames |
| 716 | /// (if they are typenames). For example, in C we do not expect identifiers |
| 717 | /// inside expressions to be treated as typenames so it will not be called |
| 718 | /// for expressions in C. |
| 719 | /// The benefit for C/ObjC is that a typename will be annotated and |
| 720 | /// Actions.isTypeName will not be needed to be called again (e.g. isTypeName |
| 721 | /// will not be called twice, once to check whether we have a declaration |
| 722 | /// specifier, and another one to get the actual type inside |
| 723 | /// ParseDeclarationSpecifiers). |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 724 | void Parser::TryAnnotateTypeOrScopeToken() { |
| 725 | if (Tok.is(tok::annot_qualtypename) || Tok.is(tok::annot_cxxscope)) |
| 726 | return; |
| 727 | |
| 728 | CXXScopeSpec SS; |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame] | 729 | if (getLang().CPlusPlus) |
| 730 | MaybeParseCXXScopeSpecifier(SS); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 731 | |
| 732 | if (Tok.is(tok::identifier)) { |
| 733 | TypeTy *Ty = Actions.isTypeName(*Tok.getIdentifierInfo(), CurScope, &SS); |
| 734 | if (Ty) { |
| 735 | // This is a typename. Replace the current token in-place with an |
| 736 | // annotation type token. |
| 737 | Tok.setKind(tok::annot_qualtypename); |
| 738 | Tok.setAnnotationValue(Ty); |
| 739 | Tok.setAnnotationEndLoc(Tok.getLocation()); |
| 740 | if (SS.isNotEmpty()) // it was a C++ qualified type name. |
| 741 | Tok.setLocation(SS.getBeginLoc()); |
| 742 | |
| 743 | // In case the tokens were cached, have Preprocessor replace them with the |
| 744 | // annotation token. |
| 745 | PP.AnnotateCachedTokens(Tok); |
| 746 | return; |
| 747 | } |
| 748 | } |
| 749 | |
| 750 | if (SS.isNotEmpty()) { |
| 751 | // A C++ scope specifier that isn't followed by a typename. |
Argyrios Kyrtzidis | 08b2c37 | 2008-11-19 15:22:16 +0000 | [diff] [blame] | 752 | // Push the current token back into the token stream (or revert it if it is |
| 753 | // cached) and use an annotation scope token for current token. |
| 754 | if (PP.isBacktrackEnabled()) |
| 755 | PP.RevertCachedTokens(1); |
| 756 | else |
| 757 | PP.EnterToken(Tok); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 758 | Tok.setKind(tok::annot_cxxscope); |
| 759 | Tok.setAnnotationValue(SS.getScopeRep()); |
| 760 | Tok.setAnnotationRange(SS.getRange()); |
| 761 | |
| 762 | // In case the tokens were cached, have Preprocessor replace them with the |
| 763 | // annotation token. |
| 764 | PP.AnnotateCachedTokens(Tok); |
| 765 | } |
| 766 | } |
| 767 | |
| 768 | /// TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only |
| 769 | /// annotates C++ scope specifiers. |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame] | 770 | void Parser::TryAnnotateCXXScopeToken() { |
| 771 | assert(getLang().CPlusPlus && |
| 772 | "Call sites of this function should be guarded by checking for C++."); |
| 773 | |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 774 | if (Tok.is(tok::annot_cxxscope)) |
| 775 | return; |
| 776 | |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame] | 777 | CXXScopeSpec SS; |
| 778 | if (MaybeParseCXXScopeSpecifier(SS)) { |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 779 | |
Argyrios Kyrtzidis | 08b2c37 | 2008-11-19 15:22:16 +0000 | [diff] [blame] | 780 | // Push the current token back into the token stream (or revert it if it is |
| 781 | // cached) and use an annotation scope token for current token. |
| 782 | if (PP.isBacktrackEnabled()) |
| 783 | PP.RevertCachedTokens(1); |
| 784 | else |
| 785 | PP.EnterToken(Tok); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 786 | Tok.setKind(tok::annot_cxxscope); |
| 787 | Tok.setAnnotationValue(SS.getScopeRep()); |
| 788 | Tok.setAnnotationRange(SS.getRange()); |
| 789 | |
| 790 | // In case the tokens were cached, have Preprocessor replace them with the |
| 791 | // annotation token. |
| 792 | PP.AnnotateCachedTokens(Tok); |
| 793 | } |
| 794 | } |