Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- ParseExprCXX.cpp - C++ Expression Parsing ------------------------===// |
| 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 Expression parsing implementation for C++. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "clang/Basic/Diagnostic.h" |
| 15 | #include "clang/Parse/Parser.h" |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 16 | #include "clang/Parse/DeclSpec.h" |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 17 | #include "AstGuard.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 18 | using namespace clang; |
| 19 | |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame^] | 20 | /// MaybeParseCXXScopeSpecifier - Parse global scope or nested-name-specifier. |
| 21 | /// Returns true if a nested-name-specifier was parsed from the token stream. |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 22 | /// |
| 23 | /// '::'[opt] nested-name-specifier |
| 24 | /// '::' |
| 25 | /// |
| 26 | /// nested-name-specifier: |
| 27 | /// type-name '::' |
| 28 | /// namespace-name '::' |
| 29 | /// nested-name-specifier identifier '::' |
| 30 | /// nested-name-specifier 'template'[opt] simple-template-id '::' [TODO] |
| 31 | /// |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame^] | 32 | bool Parser::MaybeParseCXXScopeSpecifier(CXXScopeSpec &SS) { |
| 33 | assert(getLang().CPlusPlus && |
| 34 | "Call sites of this function should be guarded by checking for C++."); |
| 35 | |
| 36 | if (Tok.isNot(tok::coloncolon) && |
| 37 | Tok.isNot(tok::annot_cxxscope) && |
| 38 | (Tok.isNot(tok::identifier) || NextToken().isNot(tok::coloncolon))) |
| 39 | return false; |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 40 | |
| 41 | if (Tok.is(tok::annot_cxxscope)) { |
| 42 | SS.setScopeRep(Tok.getAnnotationValue()); |
| 43 | SS.setRange(Tok.getAnnotationRange()); |
| 44 | ConsumeToken(); |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame^] | 45 | return true; |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 46 | } |
| 47 | |
| 48 | SS.setBeginLoc(Tok.getLocation()); |
| 49 | |
| 50 | // '::' |
| 51 | |
| 52 | if (Tok.is(tok::coloncolon)) { |
| 53 | // Global scope. |
| 54 | SourceLocation CCLoc = ConsumeToken(); |
| 55 | SS.setScopeRep(Actions.ActOnCXXGlobalScopeSpecifier(CurScope, CCLoc)); |
| 56 | SS.setEndLoc(CCLoc); |
| 57 | } |
| 58 | |
| 59 | // nested-name-specifier: |
| 60 | // type-name '::' |
| 61 | // namespace-name '::' |
| 62 | // nested-name-specifier identifier '::' |
| 63 | // nested-name-specifier 'template'[opt] simple-template-id '::' [TODO] |
| 64 | |
| 65 | while (Tok.is(tok::identifier) && NextToken().is(tok::coloncolon)) { |
| 66 | IdentifierInfo *II = Tok.getIdentifierInfo(); |
| 67 | SourceLocation IdLoc = ConsumeToken(); |
| 68 | assert(Tok.is(tok::coloncolon) && |
| 69 | "NextToken() not working properly!"); |
| 70 | SourceLocation CCLoc = ConsumeToken(); |
| 71 | if (SS.isInvalid()) |
| 72 | continue; |
| 73 | |
| 74 | SS.setScopeRep( |
| 75 | Actions.ActOnCXXNestedNameSpecifier(CurScope, SS, IdLoc, CCLoc, *II) ); |
| 76 | SS.setEndLoc(CCLoc); |
| 77 | } |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame^] | 78 | |
| 79 | return true; |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 80 | } |
| 81 | |
| 82 | /// ParseCXXIdExpression - Handle id-expression. |
| 83 | /// |
| 84 | /// id-expression: |
| 85 | /// unqualified-id |
| 86 | /// qualified-id |
| 87 | /// |
| 88 | /// unqualified-id: |
| 89 | /// identifier |
| 90 | /// operator-function-id |
| 91 | /// conversion-function-id [TODO] |
| 92 | /// '~' class-name [TODO] |
| 93 | /// template-id [TODO] |
| 94 | /// |
| 95 | /// qualified-id: |
| 96 | /// '::'[opt] nested-name-specifier 'template'[opt] unqualified-id |
| 97 | /// '::' identifier |
| 98 | /// '::' operator-function-id |
| 99 | /// '::' template-id [TODO] |
| 100 | /// |
| 101 | /// nested-name-specifier: |
| 102 | /// type-name '::' |
| 103 | /// namespace-name '::' |
| 104 | /// nested-name-specifier identifier '::' |
| 105 | /// nested-name-specifier 'template'[opt] simple-template-id '::' [TODO] |
| 106 | /// |
| 107 | /// NOTE: The standard specifies that, for qualified-id, the parser does not |
| 108 | /// expect: |
| 109 | /// |
| 110 | /// '::' conversion-function-id |
| 111 | /// '::' '~' class-name |
| 112 | /// |
| 113 | /// This may cause a slight inconsistency on diagnostics: |
| 114 | /// |
| 115 | /// class C {}; |
| 116 | /// namespace A {} |
| 117 | /// void f() { |
| 118 | /// :: A :: ~ C(); // Some Sema error about using destructor with a |
| 119 | /// // namespace. |
| 120 | /// :: ~ C(); // Some Parser error like 'unexpected ~'. |
| 121 | /// } |
| 122 | /// |
| 123 | /// We simplify the parser a bit and make it work like: |
| 124 | /// |
| 125 | /// qualified-id: |
| 126 | /// '::'[opt] nested-name-specifier 'template'[opt] unqualified-id |
| 127 | /// '::' unqualified-id |
| 128 | /// |
| 129 | /// That way Sema can handle and report similar errors for namespaces and the |
| 130 | /// global scope. |
| 131 | /// |
| 132 | Parser::ExprResult Parser::ParseCXXIdExpression() { |
| 133 | // qualified-id: |
| 134 | // '::'[opt] nested-name-specifier 'template'[opt] unqualified-id |
| 135 | // '::' unqualified-id |
| 136 | // |
| 137 | CXXScopeSpec SS; |
Argyrios Kyrtzidis | 4bdd91c | 2008-11-26 21:41:52 +0000 | [diff] [blame^] | 138 | MaybeParseCXXScopeSpecifier(SS); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 139 | |
| 140 | // unqualified-id: |
| 141 | // identifier |
| 142 | // operator-function-id |
Douglas Gregor | 2def483 | 2008-11-17 20:34:05 +0000 | [diff] [blame] | 143 | // conversion-function-id |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 144 | // '~' class-name [TODO] |
| 145 | // template-id [TODO] |
| 146 | // |
| 147 | switch (Tok.getKind()) { |
| 148 | default: |
| 149 | return Diag(Tok, diag::err_expected_unqualified_id); |
| 150 | |
| 151 | case tok::identifier: { |
| 152 | // Consume the identifier so that we can see if it is followed by a '('. |
| 153 | IdentifierInfo &II = *Tok.getIdentifierInfo(); |
| 154 | SourceLocation L = ConsumeToken(); |
| 155 | return Actions.ActOnIdentifierExpr(CurScope, L, II, |
| 156 | Tok.is(tok::l_paren), &SS); |
| 157 | } |
| 158 | |
| 159 | case tok::kw_operator: { |
| 160 | SourceLocation OperatorLoc = Tok.getLocation(); |
Douglas Gregor | e94ca9e4 | 2008-11-18 14:39:36 +0000 | [diff] [blame] | 161 | if (OverloadedOperatorKind Op = TryParseOperatorFunctionId()) { |
Douglas Gregor | 487a75a | 2008-11-19 19:09:45 +0000 | [diff] [blame] | 162 | return Actions.ActOnCXXOperatorFunctionIdExpr(CurScope, OperatorLoc, Op, |
| 163 | Tok.is(tok::l_paren), SS); |
Douglas Gregor | 2def483 | 2008-11-17 20:34:05 +0000 | [diff] [blame] | 164 | } else if (TypeTy *Type = ParseConversionFunctionId()) { |
Douglas Gregor | 487a75a | 2008-11-19 19:09:45 +0000 | [diff] [blame] | 165 | return Actions.ActOnCXXConversionFunctionExpr(CurScope, OperatorLoc, |
| 166 | Type, Tok.is(tok::l_paren), |
| 167 | SS); |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 168 | } |
Douglas Gregor | 2def483 | 2008-11-17 20:34:05 +0000 | [diff] [blame] | 169 | |
| 170 | // We already complained about a bad conversion-function-id, |
| 171 | // above. |
| 172 | return true; |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | } // switch. |
| 176 | |
| 177 | assert(0 && "The switch was supposed to take care everything."); |
| 178 | } |
| 179 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 180 | /// ParseCXXCasts - This handles the various ways to cast expressions to another |
| 181 | /// type. |
| 182 | /// |
| 183 | /// postfix-expression: [C++ 5.2p1] |
| 184 | /// 'dynamic_cast' '<' type-name '>' '(' expression ')' |
| 185 | /// 'static_cast' '<' type-name '>' '(' expression ')' |
| 186 | /// 'reinterpret_cast' '<' type-name '>' '(' expression ')' |
| 187 | /// 'const_cast' '<' type-name '>' '(' expression ')' |
| 188 | /// |
| 189 | Parser::ExprResult Parser::ParseCXXCasts() { |
| 190 | tok::TokenKind Kind = Tok.getKind(); |
| 191 | const char *CastName = 0; // For error messages |
| 192 | |
| 193 | switch (Kind) { |
| 194 | default: assert(0 && "Unknown C++ cast!"); abort(); |
| 195 | case tok::kw_const_cast: CastName = "const_cast"; break; |
| 196 | case tok::kw_dynamic_cast: CastName = "dynamic_cast"; break; |
| 197 | case tok::kw_reinterpret_cast: CastName = "reinterpret_cast"; break; |
| 198 | case tok::kw_static_cast: CastName = "static_cast"; break; |
| 199 | } |
| 200 | |
| 201 | SourceLocation OpLoc = ConsumeToken(); |
| 202 | SourceLocation LAngleBracketLoc = Tok.getLocation(); |
| 203 | |
| 204 | if (ExpectAndConsume(tok::less, diag::err_expected_less_after, CastName)) |
| 205 | return ExprResult(true); |
| 206 | |
| 207 | TypeTy *CastTy = ParseTypeName(); |
| 208 | SourceLocation RAngleBracketLoc = Tok.getLocation(); |
| 209 | |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 210 | if (ExpectAndConsume(tok::greater, diag::err_expected_greater)) |
Chris Lattner | 28eb7e9 | 2008-11-23 23:17:07 +0000 | [diff] [blame] | 211 | return Diag(LAngleBracketLoc, diag::note_matching) << "<"; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 212 | |
| 213 | SourceLocation LParenLoc = Tok.getLocation(), RParenLoc; |
| 214 | |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 215 | if (Tok.isNot(tok::l_paren)) |
| 216 | return Diag(Tok, diag::err_expected_lparen_after) << CastName; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 217 | |
| 218 | ExprResult Result = ParseSimpleParenExpression(RParenLoc); |
| 219 | |
| 220 | if (!Result.isInvalid) |
Douglas Gregor | 49badde | 2008-10-27 19:41:14 +0000 | [diff] [blame] | 221 | Result = Actions.ActOnCXXNamedCast(OpLoc, Kind, |
| 222 | LAngleBracketLoc, CastTy, RAngleBracketLoc, |
| 223 | LParenLoc, Result.Val, RParenLoc); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 224 | |
| 225 | return Result; |
| 226 | } |
| 227 | |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 228 | /// ParseCXXTypeid - This handles the C++ typeid expression. |
| 229 | /// |
| 230 | /// postfix-expression: [C++ 5.2p1] |
| 231 | /// 'typeid' '(' expression ')' |
| 232 | /// 'typeid' '(' type-id ')' |
| 233 | /// |
| 234 | Parser::ExprResult Parser::ParseCXXTypeid() { |
| 235 | assert(Tok.is(tok::kw_typeid) && "Not 'typeid'!"); |
| 236 | |
| 237 | SourceLocation OpLoc = ConsumeToken(); |
| 238 | SourceLocation LParenLoc = Tok.getLocation(); |
| 239 | SourceLocation RParenLoc; |
| 240 | |
| 241 | // typeid expressions are always parenthesized. |
| 242 | if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, |
| 243 | "typeid")) |
| 244 | return ExprResult(true); |
| 245 | |
| 246 | Parser::ExprResult Result; |
| 247 | |
| 248 | if (isTypeIdInParens()) { |
| 249 | TypeTy *Ty = ParseTypeName(); |
| 250 | |
| 251 | // Match the ')'. |
| 252 | MatchRHSPunctuation(tok::r_paren, LParenLoc); |
| 253 | |
| 254 | if (!Ty) |
| 255 | return ExprResult(true); |
| 256 | |
| 257 | Result = Actions.ActOnCXXTypeid(OpLoc, LParenLoc, /*isType=*/true, |
| 258 | Ty, RParenLoc); |
| 259 | } else { |
| 260 | Result = ParseExpression(); |
| 261 | |
| 262 | // Match the ')'. |
| 263 | if (Result.isInvalid) |
| 264 | SkipUntil(tok::r_paren); |
| 265 | else { |
| 266 | MatchRHSPunctuation(tok::r_paren, LParenLoc); |
| 267 | |
| 268 | Result = Actions.ActOnCXXTypeid(OpLoc, LParenLoc, /*isType=*/false, |
| 269 | Result.Val, RParenLoc); |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | return Result; |
| 274 | } |
| 275 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 276 | /// ParseCXXBoolLiteral - This handles the C++ Boolean literals. |
| 277 | /// |
| 278 | /// boolean-literal: [C++ 2.13.5] |
| 279 | /// 'true' |
| 280 | /// 'false' |
| 281 | Parser::ExprResult Parser::ParseCXXBoolLiteral() { |
| 282 | tok::TokenKind Kind = Tok.getKind(); |
Steve Naroff | 1b273c4 | 2007-09-16 14:56:35 +0000 | [diff] [blame] | 283 | return Actions.ActOnCXXBoolLiteral(ConsumeToken(), Kind); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 284 | } |
Chris Lattner | 50dd289 | 2008-02-26 00:51:44 +0000 | [diff] [blame] | 285 | |
| 286 | /// ParseThrowExpression - This handles the C++ throw expression. |
| 287 | /// |
| 288 | /// throw-expression: [C++ 15] |
| 289 | /// 'throw' assignment-expression[opt] |
| 290 | Parser::ExprResult Parser::ParseThrowExpression() { |
| 291 | assert(Tok.is(tok::kw_throw) && "Not throw!"); |
Chris Lattner | 50dd289 | 2008-02-26 00:51:44 +0000 | [diff] [blame] | 292 | SourceLocation ThrowLoc = ConsumeToken(); // Eat the throw token. |
Chris Lattner | 3e3d310 | 2008-04-06 06:03:03 +0000 | [diff] [blame] | 293 | |
Chris Lattner | 2a2819a | 2008-04-06 06:02:23 +0000 | [diff] [blame] | 294 | // If the current token isn't the start of an assignment-expression, |
| 295 | // then the expression is not present. This handles things like: |
| 296 | // "C ? throw : (void)42", which is crazy but legal. |
| 297 | switch (Tok.getKind()) { // FIXME: move this predicate somewhere common. |
| 298 | case tok::semi: |
| 299 | case tok::r_paren: |
| 300 | case tok::r_square: |
| 301 | case tok::r_brace: |
| 302 | case tok::colon: |
| 303 | case tok::comma: |
Chris Lattner | 50dd289 | 2008-02-26 00:51:44 +0000 | [diff] [blame] | 304 | return Actions.ActOnCXXThrow(ThrowLoc); |
| 305 | |
Chris Lattner | 2a2819a | 2008-04-06 06:02:23 +0000 | [diff] [blame] | 306 | default: |
Chris Lattner | 3e3d310 | 2008-04-06 06:03:03 +0000 | [diff] [blame] | 307 | ExprResult Expr = ParseAssignmentExpression(); |
Chris Lattner | 2a2819a | 2008-04-06 06:02:23 +0000 | [diff] [blame] | 308 | if (Expr.isInvalid) return Expr; |
| 309 | return Actions.ActOnCXXThrow(ThrowLoc, Expr.Val); |
| 310 | } |
Chris Lattner | 50dd289 | 2008-02-26 00:51:44 +0000 | [diff] [blame] | 311 | } |
Argyrios Kyrtzidis | 4cc18a4 | 2008-06-24 22:12:16 +0000 | [diff] [blame] | 312 | |
| 313 | /// ParseCXXThis - This handles the C++ 'this' pointer. |
| 314 | /// |
| 315 | /// C++ 9.3.2: In the body of a non-static member function, the keyword this is |
| 316 | /// a non-lvalue expression whose value is the address of the object for which |
| 317 | /// the function is called. |
| 318 | Parser::ExprResult Parser::ParseCXXThis() { |
| 319 | assert(Tok.is(tok::kw_this) && "Not 'this'!"); |
| 320 | SourceLocation ThisLoc = ConsumeToken(); |
Argyrios Kyrtzidis | 289d773 | 2008-08-16 19:34:46 +0000 | [diff] [blame] | 321 | return Actions.ActOnCXXThis(ThisLoc); |
Argyrios Kyrtzidis | 4cc18a4 | 2008-06-24 22:12:16 +0000 | [diff] [blame] | 322 | } |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 323 | |
| 324 | /// ParseCXXTypeConstructExpression - Parse construction of a specified type. |
| 325 | /// Can be interpreted either as function-style casting ("int(x)") |
| 326 | /// or class type construction ("ClassType(x,y,z)") |
| 327 | /// or creation of a value-initialized type ("int()"). |
| 328 | /// |
| 329 | /// postfix-expression: [C++ 5.2p1] |
| 330 | /// simple-type-specifier '(' expression-list[opt] ')' [C++ 5.2.3] |
| 331 | /// typename-specifier '(' expression-list[opt] ')' [TODO] |
| 332 | /// |
| 333 | Parser::ExprResult Parser::ParseCXXTypeConstructExpression(const DeclSpec &DS) { |
| 334 | Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); |
| 335 | TypeTy *TypeRep = Actions.ActOnTypeName(CurScope, DeclaratorInfo).Val; |
| 336 | |
| 337 | assert(Tok.is(tok::l_paren) && "Expected '('!"); |
| 338 | SourceLocation LParenLoc = ConsumeParen(); |
| 339 | |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 340 | ExprVector Exprs(Actions); |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 341 | CommaLocsTy CommaLocs; |
| 342 | |
| 343 | if (Tok.isNot(tok::r_paren)) { |
| 344 | if (ParseExpressionList(Exprs, CommaLocs)) { |
| 345 | SkipUntil(tok::r_paren); |
| 346 | return ExprResult(true); |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | // Match the ')'. |
| 351 | SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); |
| 352 | |
| 353 | assert((Exprs.size() == 0 || Exprs.size()-1 == CommaLocs.size())&& |
| 354 | "Unexpected number of commas!"); |
| 355 | return Actions.ActOnCXXTypeConstructExpr(DS.getSourceRange(), TypeRep, |
| 356 | LParenLoc, |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 357 | Exprs.take(), Exprs.size(), |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 358 | &CommaLocs[0], RParenLoc); |
| 359 | } |
| 360 | |
Argyrios Kyrtzidis | 71b914b | 2008-09-09 20:38:47 +0000 | [diff] [blame] | 361 | /// ParseCXXCondition - if/switch/while/for condition expression. |
| 362 | /// |
| 363 | /// condition: |
| 364 | /// expression |
| 365 | /// type-specifier-seq declarator '=' assignment-expression |
| 366 | /// [GNU] type-specifier-seq declarator simple-asm-expr[opt] attributes[opt] |
| 367 | /// '=' assignment-expression |
| 368 | /// |
| 369 | Parser::ExprResult Parser::ParseCXXCondition() { |
Argyrios Kyrtzidis | a8a4598 | 2008-10-05 15:03:47 +0000 | [diff] [blame] | 370 | if (!isCXXConditionDeclaration()) |
Argyrios Kyrtzidis | 71b914b | 2008-09-09 20:38:47 +0000 | [diff] [blame] | 371 | return ParseExpression(); // expression |
| 372 | |
| 373 | SourceLocation StartLoc = Tok.getLocation(); |
| 374 | |
| 375 | // type-specifier-seq |
| 376 | DeclSpec DS; |
| 377 | ParseSpecifierQualifierList(DS); |
| 378 | |
| 379 | // declarator |
| 380 | Declarator DeclaratorInfo(DS, Declarator::ConditionContext); |
| 381 | ParseDeclarator(DeclaratorInfo); |
| 382 | |
| 383 | // simple-asm-expr[opt] |
| 384 | if (Tok.is(tok::kw_asm)) { |
| 385 | ExprResult AsmLabel = ParseSimpleAsm(); |
| 386 | if (AsmLabel.isInvalid) { |
| 387 | SkipUntil(tok::semi); |
| 388 | return true; |
| 389 | } |
| 390 | DeclaratorInfo.setAsmLabel(AsmLabel.Val); |
| 391 | } |
| 392 | |
| 393 | // If attributes are present, parse them. |
| 394 | if (Tok.is(tok::kw___attribute)) |
| 395 | DeclaratorInfo.AddAttributes(ParseAttributes()); |
| 396 | |
| 397 | // '=' assignment-expression |
| 398 | if (Tok.isNot(tok::equal)) |
| 399 | return Diag(Tok, diag::err_expected_equal_after_declarator); |
| 400 | SourceLocation EqualLoc = ConsumeToken(); |
| 401 | ExprResult AssignExpr = ParseAssignmentExpression(); |
| 402 | if (AssignExpr.isInvalid) |
| 403 | return true; |
| 404 | |
| 405 | return Actions.ActOnCXXConditionDeclarationExpr(CurScope, StartLoc, |
| 406 | DeclaratorInfo, |
| 407 | EqualLoc, AssignExpr.Val); |
| 408 | } |
| 409 | |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 410 | /// ParseCXXSimpleTypeSpecifier - [C++ 7.1.5.2] Simple type specifiers. |
| 411 | /// This should only be called when the current token is known to be part of |
| 412 | /// simple-type-specifier. |
| 413 | /// |
| 414 | /// simple-type-specifier: |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 415 | /// '::'[opt] nested-name-specifier[opt] type-name |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 416 | /// '::'[opt] nested-name-specifier 'template' simple-template-id [TODO] |
| 417 | /// char |
| 418 | /// wchar_t |
| 419 | /// bool |
| 420 | /// short |
| 421 | /// int |
| 422 | /// long |
| 423 | /// signed |
| 424 | /// unsigned |
| 425 | /// float |
| 426 | /// double |
| 427 | /// void |
| 428 | /// [GNU] typeof-specifier |
| 429 | /// [C++0x] auto [TODO] |
| 430 | /// |
| 431 | /// type-name: |
| 432 | /// class-name |
| 433 | /// enum-name |
| 434 | /// typedef-name |
| 435 | /// |
| 436 | void Parser::ParseCXXSimpleTypeSpecifier(DeclSpec &DS) { |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 437 | // Annotate typenames and C++ scope specifiers. |
| 438 | TryAnnotateTypeOrScopeToken(); |
| 439 | |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 440 | DS.SetRangeStart(Tok.getLocation()); |
| 441 | const char *PrevSpec; |
| 442 | SourceLocation Loc = Tok.getLocation(); |
| 443 | |
| 444 | switch (Tok.getKind()) { |
| 445 | default: |
| 446 | assert(0 && "Not a simple-type-specifier token!"); |
| 447 | abort(); |
| 448 | |
| 449 | // type-name |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 450 | case tok::annot_qualtypename: { |
| 451 | DS.SetTypeSpecType(DeclSpec::TST_typedef, Loc, PrevSpec, |
| 452 | Tok.getAnnotationValue()); |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 453 | break; |
| 454 | } |
| 455 | |
| 456 | // builtin types |
| 457 | case tok::kw_short: |
| 458 | DS.SetTypeSpecWidth(DeclSpec::TSW_short, Loc, PrevSpec); |
| 459 | break; |
| 460 | case tok::kw_long: |
| 461 | DS.SetTypeSpecWidth(DeclSpec::TSW_long, Loc, PrevSpec); |
| 462 | break; |
| 463 | case tok::kw_signed: |
| 464 | DS.SetTypeSpecSign(DeclSpec::TSS_signed, Loc, PrevSpec); |
| 465 | break; |
| 466 | case tok::kw_unsigned: |
| 467 | DS.SetTypeSpecSign(DeclSpec::TSS_unsigned, Loc, PrevSpec); |
| 468 | break; |
| 469 | case tok::kw_void: |
| 470 | DS.SetTypeSpecType(DeclSpec::TST_void, Loc, PrevSpec); |
| 471 | break; |
| 472 | case tok::kw_char: |
| 473 | DS.SetTypeSpecType(DeclSpec::TST_char, Loc, PrevSpec); |
| 474 | break; |
| 475 | case tok::kw_int: |
| 476 | DS.SetTypeSpecType(DeclSpec::TST_int, Loc, PrevSpec); |
| 477 | break; |
| 478 | case tok::kw_float: |
| 479 | DS.SetTypeSpecType(DeclSpec::TST_float, Loc, PrevSpec); |
| 480 | break; |
| 481 | case tok::kw_double: |
| 482 | DS.SetTypeSpecType(DeclSpec::TST_double, Loc, PrevSpec); |
| 483 | break; |
| 484 | case tok::kw_wchar_t: |
| 485 | DS.SetTypeSpecType(DeclSpec::TST_wchar, Loc, PrevSpec); |
| 486 | break; |
| 487 | case tok::kw_bool: |
| 488 | DS.SetTypeSpecType(DeclSpec::TST_bool, Loc, PrevSpec); |
| 489 | break; |
| 490 | |
| 491 | // GNU typeof support. |
| 492 | case tok::kw_typeof: |
| 493 | ParseTypeofSpecifier(DS); |
| 494 | DS.Finish(Diags, PP.getSourceManager(), getLang()); |
| 495 | return; |
| 496 | } |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 497 | if (Tok.is(tok::annot_qualtypename)) |
| 498 | DS.SetRangeEnd(Tok.getAnnotationEndLoc()); |
| 499 | else |
| 500 | DS.SetRangeEnd(Tok.getLocation()); |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 501 | ConsumeToken(); |
| 502 | DS.Finish(Diags, PP.getSourceManager(), getLang()); |
| 503 | } |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 504 | |
Douglas Gregor | 2f1bc52 | 2008-11-07 20:08:42 +0000 | [diff] [blame] | 505 | /// ParseCXXTypeSpecifierSeq - Parse a C++ type-specifier-seq (C++ |
| 506 | /// [dcl.name]), which is a non-empty sequence of type-specifiers, |
| 507 | /// e.g., "const short int". Note that the DeclSpec is *not* finished |
| 508 | /// by parsing the type-specifier-seq, because these sequences are |
| 509 | /// typically followed by some form of declarator. Returns true and |
| 510 | /// emits diagnostics if this is not a type-specifier-seq, false |
| 511 | /// otherwise. |
| 512 | /// |
| 513 | /// type-specifier-seq: [C++ 8.1] |
| 514 | /// type-specifier type-specifier-seq[opt] |
| 515 | /// |
| 516 | bool Parser::ParseCXXTypeSpecifierSeq(DeclSpec &DS) { |
| 517 | DS.SetRangeStart(Tok.getLocation()); |
| 518 | const char *PrevSpec = 0; |
| 519 | int isInvalid = 0; |
| 520 | |
| 521 | // Parse one or more of the type specifiers. |
| 522 | if (!MaybeParseTypeSpecifier(DS, isInvalid, PrevSpec)) { |
Chris Lattner | 1ab3b96 | 2008-11-18 07:48:38 +0000 | [diff] [blame] | 523 | Diag(Tok, diag::err_operator_missing_type_specifier); |
Douglas Gregor | 2f1bc52 | 2008-11-07 20:08:42 +0000 | [diff] [blame] | 524 | return true; |
| 525 | } |
Daniel Dunbar | b90585c | 2008-11-08 04:28:37 +0000 | [diff] [blame] | 526 | while (MaybeParseTypeSpecifier(DS, isInvalid, PrevSpec)) ; |
Douglas Gregor | 2f1bc52 | 2008-11-07 20:08:42 +0000 | [diff] [blame] | 527 | |
| 528 | return false; |
| 529 | } |
| 530 | |
Douglas Gregor | 43c7bad | 2008-11-17 16:14:12 +0000 | [diff] [blame] | 531 | /// TryParseOperatorFunctionId - Attempts to parse a C++ overloaded |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 532 | /// operator name (C++ [over.oper]). If successful, returns the |
| 533 | /// predefined identifier that corresponds to that overloaded |
| 534 | /// operator. Otherwise, returns NULL and does not consume any tokens. |
| 535 | /// |
| 536 | /// operator-function-id: [C++ 13.5] |
| 537 | /// 'operator' operator |
| 538 | /// |
| 539 | /// operator: one of |
| 540 | /// new delete new[] delete[] |
| 541 | /// + - * / % ^ & | ~ |
| 542 | /// ! = < > += -= *= /= %= |
| 543 | /// ^= &= |= << >> >>= <<= == != |
| 544 | /// <= >= && || ++ -- , ->* -> |
| 545 | /// () [] |
Douglas Gregor | e94ca9e4 | 2008-11-18 14:39:36 +0000 | [diff] [blame] | 546 | OverloadedOperatorKind Parser::TryParseOperatorFunctionId() { |
Argyrios Kyrtzidis | 9057a81 | 2008-11-07 15:54:02 +0000 | [diff] [blame] | 547 | assert(Tok.is(tok::kw_operator) && "Expected 'operator' keyword"); |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 548 | |
| 549 | OverloadedOperatorKind Op = OO_None; |
| 550 | switch (NextToken().getKind()) { |
| 551 | case tok::kw_new: |
| 552 | ConsumeToken(); // 'operator' |
| 553 | ConsumeToken(); // 'new' |
| 554 | if (Tok.is(tok::l_square)) { |
| 555 | ConsumeBracket(); // '[' |
| 556 | ExpectAndConsume(tok::r_square, diag::err_expected_rsquare); // ']' |
| 557 | Op = OO_Array_New; |
| 558 | } else { |
| 559 | Op = OO_New; |
| 560 | } |
Douglas Gregor | e94ca9e4 | 2008-11-18 14:39:36 +0000 | [diff] [blame] | 561 | return Op; |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 562 | |
| 563 | case tok::kw_delete: |
| 564 | ConsumeToken(); // 'operator' |
| 565 | ConsumeToken(); // 'delete' |
| 566 | if (Tok.is(tok::l_square)) { |
| 567 | ConsumeBracket(); // '[' |
| 568 | ExpectAndConsume(tok::r_square, diag::err_expected_rsquare); // ']' |
| 569 | Op = OO_Array_Delete; |
| 570 | } else { |
| 571 | Op = OO_Delete; |
| 572 | } |
Douglas Gregor | e94ca9e4 | 2008-11-18 14:39:36 +0000 | [diff] [blame] | 573 | return Op; |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 574 | |
Douglas Gregor | 02bcd4c | 2008-11-10 13:38:07 +0000 | [diff] [blame] | 575 | #define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \ |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 576 | case tok::Token: Op = OO_##Name; break; |
Douglas Gregor | 02bcd4c | 2008-11-10 13:38:07 +0000 | [diff] [blame] | 577 | #define OVERLOADED_OPERATOR_MULTI(Name,Spelling,Unary,Binary,MemberOnly) |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 578 | #include "clang/Basic/OperatorKinds.def" |
| 579 | |
| 580 | case tok::l_paren: |
| 581 | ConsumeToken(); // 'operator' |
| 582 | ConsumeParen(); // '(' |
| 583 | ExpectAndConsume(tok::r_paren, diag::err_expected_rparen); // ')' |
Douglas Gregor | e94ca9e4 | 2008-11-18 14:39:36 +0000 | [diff] [blame] | 584 | return OO_Call; |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 585 | |
| 586 | case tok::l_square: |
| 587 | ConsumeToken(); // 'operator' |
| 588 | ConsumeBracket(); // '[' |
| 589 | ExpectAndConsume(tok::r_square, diag::err_expected_rsquare); // ']' |
Douglas Gregor | e94ca9e4 | 2008-11-18 14:39:36 +0000 | [diff] [blame] | 590 | return OO_Subscript; |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 591 | |
| 592 | default: |
Douglas Gregor | e94ca9e4 | 2008-11-18 14:39:36 +0000 | [diff] [blame] | 593 | return OO_None; |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 594 | } |
| 595 | |
Douglas Gregor | 43c7bad | 2008-11-17 16:14:12 +0000 | [diff] [blame] | 596 | ConsumeToken(); // 'operator' |
| 597 | ConsumeAnyToken(); // the operator itself |
Douglas Gregor | e94ca9e4 | 2008-11-18 14:39:36 +0000 | [diff] [blame] | 598 | return Op; |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 599 | } |
Douglas Gregor | 2f1bc52 | 2008-11-07 20:08:42 +0000 | [diff] [blame] | 600 | |
| 601 | /// ParseConversionFunctionId - Parse a C++ conversion-function-id, |
| 602 | /// which expresses the name of a user-defined conversion operator |
| 603 | /// (C++ [class.conv.fct]p1). Returns the type that this operator is |
| 604 | /// specifying a conversion for, or NULL if there was an error. |
| 605 | /// |
| 606 | /// conversion-function-id: [C++ 12.3.2] |
| 607 | /// operator conversion-type-id |
| 608 | /// |
| 609 | /// conversion-type-id: |
| 610 | /// type-specifier-seq conversion-declarator[opt] |
| 611 | /// |
| 612 | /// conversion-declarator: |
| 613 | /// ptr-operator conversion-declarator[opt] |
| 614 | Parser::TypeTy *Parser::ParseConversionFunctionId() { |
| 615 | assert(Tok.is(tok::kw_operator) && "Expected 'operator' keyword"); |
| 616 | ConsumeToken(); // 'operator' |
| 617 | |
| 618 | // Parse the type-specifier-seq. |
| 619 | DeclSpec DS; |
| 620 | if (ParseCXXTypeSpecifierSeq(DS)) |
| 621 | return 0; |
| 622 | |
| 623 | // Parse the conversion-declarator, which is merely a sequence of |
| 624 | // ptr-operators. |
| 625 | Declarator D(DS, Declarator::TypeNameContext); |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 626 | ParseDeclaratorInternal(D, /*DirectDeclParser=*/0); |
Douglas Gregor | 2f1bc52 | 2008-11-07 20:08:42 +0000 | [diff] [blame] | 627 | |
| 628 | // Finish up the type. |
| 629 | Action::TypeResult Result = Actions.ActOnTypeName(CurScope, D); |
| 630 | if (Result.isInvalid) |
| 631 | return 0; |
| 632 | else |
| 633 | return Result.Val; |
| 634 | } |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 635 | |
| 636 | /// ParseCXXNewExpression - Parse a C++ new-expression. New is used to allocate |
| 637 | /// memory in a typesafe manner and call constructors. |
| 638 | /// |
| 639 | /// new-expression: |
| 640 | /// '::'[opt] 'new' new-placement[opt] new-type-id |
| 641 | /// new-initializer[opt] |
| 642 | /// '::'[opt] 'new' new-placement[opt] '(' type-id ')' |
| 643 | /// new-initializer[opt] |
| 644 | /// |
| 645 | /// new-placement: |
| 646 | /// '(' expression-list ')' |
| 647 | /// |
| 648 | /// new-initializer: |
| 649 | /// '(' expression-list[opt] ')' |
| 650 | /// [C++0x] braced-init-list [TODO] |
| 651 | /// |
| 652 | Parser::ExprResult Parser::ParseCXXNewExpression() |
| 653 | { |
| 654 | assert((Tok.is(tok::coloncolon) || Tok.is(tok::kw_new)) && |
| 655 | "Expected :: or 'new' keyword"); |
| 656 | |
| 657 | SourceLocation Start = Tok.getLocation(); |
| 658 | bool UseGlobal = false; |
| 659 | if (Tok.is(tok::coloncolon)) { |
| 660 | UseGlobal = true; |
| 661 | ConsumeToken(); |
| 662 | } |
| 663 | |
| 664 | assert(Tok.is(tok::kw_new) && "Lookahead should have ensured 'new'"); |
| 665 | // Consume 'new' |
| 666 | ConsumeToken(); |
| 667 | |
| 668 | // A '(' now can be a new-placement or the '(' wrapping the type-id in the |
| 669 | // second form of new-expression. It can't be a new-type-id. |
| 670 | |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 671 | ExprVector PlacementArgs(Actions); |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 672 | SourceLocation PlacementLParen, PlacementRParen; |
| 673 | |
| 674 | TypeTy *Ty = 0; |
| 675 | SourceLocation TyStart, TyEnd; |
| 676 | bool ParenTypeId; |
| 677 | if (Tok.is(tok::l_paren)) { |
| 678 | // If it turns out to be a placement, we change the type location. |
| 679 | PlacementLParen = ConsumeParen(); |
| 680 | TyStart = Tok.getLocation(); |
| 681 | if (ParseExpressionListOrTypeId(PlacementArgs, Ty)) |
| 682 | return true; |
| 683 | TyEnd = Tok.getLocation(); |
| 684 | |
| 685 | PlacementRParen = MatchRHSPunctuation(tok::r_paren, PlacementLParen); |
| 686 | if (PlacementRParen.isInvalid()) |
| 687 | return true; |
| 688 | |
| 689 | if (Ty) { |
| 690 | // Reset the placement locations. There was no placement. |
| 691 | PlacementLParen = PlacementRParen = SourceLocation(); |
| 692 | ParenTypeId = true; |
| 693 | } else { |
| 694 | // We still need the type. |
| 695 | if (Tok.is(tok::l_paren)) { |
| 696 | ConsumeParen(); |
| 697 | TyStart = Tok.getLocation(); |
| 698 | Ty = ParseTypeName(/*CXXNewMode=*/true); |
| 699 | ParenTypeId = true; |
| 700 | } else { |
| 701 | TyStart = Tok.getLocation(); |
| 702 | Ty = ParseNewTypeId(); |
| 703 | ParenTypeId = false; |
| 704 | } |
| 705 | if (!Ty) |
| 706 | return true; |
| 707 | TyEnd = Tok.getLocation(); |
| 708 | } |
| 709 | } else { |
| 710 | TyStart = Tok.getLocation(); |
| 711 | Ty = ParseNewTypeId(); |
| 712 | if (!Ty) |
| 713 | return true; |
| 714 | TyEnd = Tok.getLocation(); |
| 715 | ParenTypeId = false; |
| 716 | } |
| 717 | |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 718 | ExprVector ConstructorArgs(Actions); |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 719 | SourceLocation ConstructorLParen, ConstructorRParen; |
| 720 | |
| 721 | if (Tok.is(tok::l_paren)) { |
| 722 | ConstructorLParen = ConsumeParen(); |
| 723 | if (Tok.isNot(tok::r_paren)) { |
| 724 | CommaLocsTy CommaLocs; |
| 725 | if (ParseExpressionList(ConstructorArgs, CommaLocs)) |
| 726 | return true; |
| 727 | } |
| 728 | ConstructorRParen = MatchRHSPunctuation(tok::r_paren, ConstructorLParen); |
| 729 | if (ConstructorRParen.isInvalid()) |
| 730 | return true; |
| 731 | } |
| 732 | |
| 733 | return Actions.ActOnCXXNew(Start, UseGlobal, PlacementLParen, |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 734 | PlacementArgs.take(), PlacementArgs.size(), |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 735 | PlacementRParen, ParenTypeId, TyStart, Ty, TyEnd, |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 736 | ConstructorLParen, ConstructorArgs.take(), |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 737 | ConstructorArgs.size(), ConstructorRParen); |
| 738 | } |
| 739 | |
| 740 | /// ParseNewTypeId - Parses a type ID as it appears in a new expression. |
| 741 | /// The most interesting part of this is the new-declarator, which can be a |
| 742 | /// multi-dimensional array, of which the first has a non-constant expression as |
| 743 | /// the size, e.g. |
| 744 | /// @code new int[runtimeSize()][2][2] @endcode |
| 745 | /// |
| 746 | /// new-type-id: |
| 747 | /// type-specifier-seq new-declarator[opt] |
| 748 | /// |
| 749 | /// new-declarator: |
| 750 | /// ptr-operator new-declarator[opt] |
| 751 | /// direct-new-declarator |
| 752 | /// |
| 753 | Parser::TypeTy * Parser::ParseNewTypeId() |
| 754 | { |
| 755 | DeclSpec DS; |
| 756 | if (ParseCXXTypeSpecifierSeq(DS)) |
| 757 | return 0; |
| 758 | |
| 759 | // A new-declarator is a simplified version of a declarator. We use |
| 760 | // ParseDeclaratorInternal, but pass our own direct declarator parser, |
| 761 | // one that parses a direct-new-declarator. |
| 762 | Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); |
| 763 | ParseDeclaratorInternal(DeclaratorInfo, &Parser::ParseDirectNewDeclarator); |
| 764 | |
| 765 | TypeTy *Ty = Actions.ActOnTypeName(CurScope, DeclaratorInfo, |
| 766 | /*CXXNewMode=*/true).Val; |
| 767 | return DeclaratorInfo.getInvalidType() ? 0 : Ty; |
| 768 | } |
| 769 | |
| 770 | /// ParseDirectNewDeclarator - Parses a direct-new-declarator. Intended to be |
| 771 | /// passed to ParseDeclaratorInternal. |
| 772 | /// |
| 773 | /// direct-new-declarator: |
| 774 | /// '[' expression ']' |
| 775 | /// direct-new-declarator '[' constant-expression ']' |
| 776 | /// |
| 777 | void Parser::ParseDirectNewDeclarator(Declarator &D) |
| 778 | { |
| 779 | // Parse the array dimensions. |
| 780 | bool first = true; |
| 781 | while (Tok.is(tok::l_square)) { |
| 782 | SourceLocation LLoc = ConsumeBracket(); |
| 783 | ExprResult Size = first ? ParseExpression() : ParseConstantExpression(); |
| 784 | if (Size.isInvalid) { |
| 785 | // Recover |
| 786 | SkipUntil(tok::r_square); |
| 787 | return; |
| 788 | } |
| 789 | first = false; |
| 790 | |
| 791 | D.AddTypeInfo(DeclaratorChunk::getArray(0, /*static=*/false, /*star=*/false, |
| 792 | Size.Val, LLoc)); |
| 793 | |
| 794 | if (MatchRHSPunctuation(tok::r_square, LLoc).isInvalid()) |
| 795 | return; |
| 796 | } |
| 797 | } |
| 798 | |
| 799 | /// ParseExpressionListOrTypeId - Parse either an expression-list or a type-id. |
| 800 | /// This ambiguity appears in the syntax of the C++ new operator. |
| 801 | /// |
| 802 | /// new-expression: |
| 803 | /// '::'[opt] 'new' new-placement[opt] '(' type-id ')' |
| 804 | /// new-initializer[opt] |
| 805 | /// |
| 806 | /// new-placement: |
| 807 | /// '(' expression-list ')' |
| 808 | /// |
| 809 | bool Parser::ParseExpressionListOrTypeId(ExprListTy &PlacementArgs, TypeTy *&Ty) |
| 810 | { |
| 811 | // The '(' was already consumed. |
| 812 | if (isTypeIdInParens()) { |
| 813 | Ty = ParseTypeName(/*CXXNewMode=*/true); |
| 814 | return Ty == 0; |
| 815 | } |
| 816 | |
| 817 | // It's not a type, it has to be an expression list. |
| 818 | // Discard the comma locations - ActOnCXXNew has enough parameters. |
| 819 | CommaLocsTy CommaLocs; |
| 820 | return ParseExpressionList(PlacementArgs, CommaLocs); |
| 821 | } |
| 822 | |
| 823 | /// ParseCXXDeleteExpression - Parse a C++ delete-expression. Delete is used |
| 824 | /// to free memory allocated by new. |
| 825 | /// |
| 826 | /// delete-expression: |
| 827 | /// '::'[opt] 'delete' cast-expression |
| 828 | /// '::'[opt] 'delete' '[' ']' cast-expression |
| 829 | Parser::ExprResult Parser::ParseCXXDeleteExpression() |
| 830 | { |
| 831 | assert((Tok.is(tok::coloncolon) || Tok.is(tok::kw_delete)) && |
| 832 | "Expected :: or 'delete' keyword"); |
| 833 | |
| 834 | SourceLocation Start = Tok.getLocation(); |
| 835 | bool UseGlobal = false; |
| 836 | if (Tok.is(tok::coloncolon)) { |
| 837 | UseGlobal = true; |
| 838 | ConsumeToken(); |
| 839 | } |
| 840 | |
| 841 | assert(Tok.is(tok::kw_delete) && "Lookahead should have ensured 'delete'"); |
| 842 | // Consume 'delete' |
| 843 | ConsumeToken(); |
| 844 | |
| 845 | // Array delete? |
| 846 | bool ArrayDelete = false; |
| 847 | if (Tok.is(tok::l_square)) { |
| 848 | ArrayDelete = true; |
| 849 | SourceLocation LHS = ConsumeBracket(); |
| 850 | SourceLocation RHS = MatchRHSPunctuation(tok::r_square, LHS); |
| 851 | if (RHS.isInvalid()) |
| 852 | return true; |
| 853 | } |
| 854 | |
| 855 | ExprResult Operand = ParseCastExpression(false); |
| 856 | if (Operand.isInvalid) |
| 857 | return Operand; |
| 858 | |
| 859 | return Actions.ActOnCXXDelete(Start, UseGlobal, ArrayDelete, Operand.Val); |
| 860 | } |