| File: | build/llvm-toolchain-snapshot-15~++20220420111733+e13d2efed663/clang/lib/Parse/ParseExpr.cpp |
| Warning: | line 947, column 11 Value stored to 'ParenExprType' is never read |
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| 1 | //===--- ParseExpr.cpp - Expression Parsing -------------------------------===// |
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | /// |
| 9 | /// \file |
| 10 | /// Provides the Expression parsing implementation. |
| 11 | /// |
| 12 | /// Expressions in C99 basically consist of a bunch of binary operators with |
| 13 | /// unary operators and other random stuff at the leaves. |
| 14 | /// |
| 15 | /// In the C99 grammar, these unary operators bind tightest and are represented |
| 16 | /// as the 'cast-expression' production. Everything else is either a binary |
| 17 | /// operator (e.g. '/') or a ternary operator ("?:"). The unary leaves are |
| 18 | /// handled by ParseCastExpression, the higher level pieces are handled by |
| 19 | /// ParseBinaryExpression. |
| 20 | /// |
| 21 | //===----------------------------------------------------------------------===// |
| 22 | |
| 23 | #include "clang/Parse/Parser.h" |
| 24 | #include "clang/AST/ASTContext.h" |
| 25 | #include "clang/AST/ExprCXX.h" |
| 26 | #include "clang/Basic/PrettyStackTrace.h" |
| 27 | #include "clang/Parse/RAIIObjectsForParser.h" |
| 28 | #include "clang/Sema/DeclSpec.h" |
| 29 | #include "clang/Sema/ParsedTemplate.h" |
| 30 | #include "clang/Sema/Scope.h" |
| 31 | #include "clang/Sema/TypoCorrection.h" |
| 32 | #include "llvm/ADT/SmallVector.h" |
| 33 | using namespace clang; |
| 34 | |
| 35 | /// Simple precedence-based parser for binary/ternary operators. |
| 36 | /// |
| 37 | /// Note: we diverge from the C99 grammar when parsing the assignment-expression |
| 38 | /// production. C99 specifies that the LHS of an assignment operator should be |
| 39 | /// parsed as a unary-expression, but consistency dictates that it be a |
| 40 | /// conditional-expession. In practice, the important thing here is that the |
| 41 | /// LHS of an assignment has to be an l-value, which productions between |
| 42 | /// unary-expression and conditional-expression don't produce. Because we want |
| 43 | /// consistency, we parse the LHS as a conditional-expression, then check for |
| 44 | /// l-value-ness in semantic analysis stages. |
| 45 | /// |
| 46 | /// \verbatim |
| 47 | /// pm-expression: [C++ 5.5] |
| 48 | /// cast-expression |
| 49 | /// pm-expression '.*' cast-expression |
| 50 | /// pm-expression '->*' cast-expression |
| 51 | /// |
| 52 | /// multiplicative-expression: [C99 6.5.5] |
| 53 | /// Note: in C++, apply pm-expression instead of cast-expression |
| 54 | /// cast-expression |
| 55 | /// multiplicative-expression '*' cast-expression |
| 56 | /// multiplicative-expression '/' cast-expression |
| 57 | /// multiplicative-expression '%' cast-expression |
| 58 | /// |
| 59 | /// additive-expression: [C99 6.5.6] |
| 60 | /// multiplicative-expression |
| 61 | /// additive-expression '+' multiplicative-expression |
| 62 | /// additive-expression '-' multiplicative-expression |
| 63 | /// |
| 64 | /// shift-expression: [C99 6.5.7] |
| 65 | /// additive-expression |
| 66 | /// shift-expression '<<' additive-expression |
| 67 | /// shift-expression '>>' additive-expression |
| 68 | /// |
| 69 | /// compare-expression: [C++20 expr.spaceship] |
| 70 | /// shift-expression |
| 71 | /// compare-expression '<=>' shift-expression |
| 72 | /// |
| 73 | /// relational-expression: [C99 6.5.8] |
| 74 | /// compare-expression |
| 75 | /// relational-expression '<' compare-expression |
| 76 | /// relational-expression '>' compare-expression |
| 77 | /// relational-expression '<=' compare-expression |
| 78 | /// relational-expression '>=' compare-expression |
| 79 | /// |
| 80 | /// equality-expression: [C99 6.5.9] |
| 81 | /// relational-expression |
| 82 | /// equality-expression '==' relational-expression |
| 83 | /// equality-expression '!=' relational-expression |
| 84 | /// |
| 85 | /// AND-expression: [C99 6.5.10] |
| 86 | /// equality-expression |
| 87 | /// AND-expression '&' equality-expression |
| 88 | /// |
| 89 | /// exclusive-OR-expression: [C99 6.5.11] |
| 90 | /// AND-expression |
| 91 | /// exclusive-OR-expression '^' AND-expression |
| 92 | /// |
| 93 | /// inclusive-OR-expression: [C99 6.5.12] |
| 94 | /// exclusive-OR-expression |
| 95 | /// inclusive-OR-expression '|' exclusive-OR-expression |
| 96 | /// |
| 97 | /// logical-AND-expression: [C99 6.5.13] |
| 98 | /// inclusive-OR-expression |
| 99 | /// logical-AND-expression '&&' inclusive-OR-expression |
| 100 | /// |
| 101 | /// logical-OR-expression: [C99 6.5.14] |
| 102 | /// logical-AND-expression |
| 103 | /// logical-OR-expression '||' logical-AND-expression |
| 104 | /// |
| 105 | /// conditional-expression: [C99 6.5.15] |
| 106 | /// logical-OR-expression |
| 107 | /// logical-OR-expression '?' expression ':' conditional-expression |
| 108 | /// [GNU] logical-OR-expression '?' ':' conditional-expression |
| 109 | /// [C++] the third operand is an assignment-expression |
| 110 | /// |
| 111 | /// assignment-expression: [C99 6.5.16] |
| 112 | /// conditional-expression |
| 113 | /// unary-expression assignment-operator assignment-expression |
| 114 | /// [C++] throw-expression [C++ 15] |
| 115 | /// |
| 116 | /// assignment-operator: one of |
| 117 | /// = *= /= %= += -= <<= >>= &= ^= |= |
| 118 | /// |
| 119 | /// expression: [C99 6.5.17] |
| 120 | /// assignment-expression ...[opt] |
| 121 | /// expression ',' assignment-expression ...[opt] |
| 122 | /// \endverbatim |
| 123 | ExprResult Parser::ParseExpression(TypeCastState isTypeCast) { |
| 124 | ExprResult LHS(ParseAssignmentExpression(isTypeCast)); |
| 125 | return ParseRHSOfBinaryExpression(LHS, prec::Comma); |
| 126 | } |
| 127 | |
| 128 | /// This routine is called when the '@' is seen and consumed. |
| 129 | /// Current token is an Identifier and is not a 'try'. This |
| 130 | /// routine is necessary to disambiguate \@try-statement from, |
| 131 | /// for example, \@encode-expression. |
| 132 | /// |
| 133 | ExprResult |
| 134 | Parser::ParseExpressionWithLeadingAt(SourceLocation AtLoc) { |
| 135 | ExprResult LHS(ParseObjCAtExpression(AtLoc)); |
| 136 | return ParseRHSOfBinaryExpression(LHS, prec::Comma); |
| 137 | } |
| 138 | |
| 139 | /// This routine is called when a leading '__extension__' is seen and |
| 140 | /// consumed. This is necessary because the token gets consumed in the |
| 141 | /// process of disambiguating between an expression and a declaration. |
| 142 | ExprResult |
| 143 | Parser::ParseExpressionWithLeadingExtension(SourceLocation ExtLoc) { |
| 144 | ExprResult LHS(true); |
| 145 | { |
| 146 | // Silence extension warnings in the sub-expression |
| 147 | ExtensionRAIIObject O(Diags); |
| 148 | |
| 149 | LHS = ParseCastExpression(AnyCastExpr); |
| 150 | } |
| 151 | |
| 152 | if (!LHS.isInvalid()) |
| 153 | LHS = Actions.ActOnUnaryOp(getCurScope(), ExtLoc, tok::kw___extension__, |
| 154 | LHS.get()); |
| 155 | |
| 156 | return ParseRHSOfBinaryExpression(LHS, prec::Comma); |
| 157 | } |
| 158 | |
| 159 | /// Parse an expr that doesn't include (top-level) commas. |
| 160 | ExprResult Parser::ParseAssignmentExpression(TypeCastState isTypeCast) { |
| 161 | if (Tok.is(tok::code_completion)) { |
| 162 | cutOffParsing(); |
| 163 | Actions.CodeCompleteExpression(getCurScope(), |
| 164 | PreferredType.get(Tok.getLocation())); |
| 165 | return ExprError(); |
| 166 | } |
| 167 | |
| 168 | if (Tok.is(tok::kw_throw)) |
| 169 | return ParseThrowExpression(); |
| 170 | if (Tok.is(tok::kw_co_yield)) |
| 171 | return ParseCoyieldExpression(); |
| 172 | |
| 173 | ExprResult LHS = ParseCastExpression(AnyCastExpr, |
| 174 | /*isAddressOfOperand=*/false, |
| 175 | isTypeCast); |
| 176 | return ParseRHSOfBinaryExpression(LHS, prec::Assignment); |
| 177 | } |
| 178 | |
| 179 | /// Parse an assignment expression where part of an Objective-C message |
| 180 | /// send has already been parsed. |
| 181 | /// |
| 182 | /// In this case \p LBracLoc indicates the location of the '[' of the message |
| 183 | /// send, and either \p ReceiverName or \p ReceiverExpr is non-null indicating |
| 184 | /// the receiver of the message. |
| 185 | /// |
| 186 | /// Since this handles full assignment-expression's, it handles postfix |
| 187 | /// expressions and other binary operators for these expressions as well. |
| 188 | ExprResult |
| 189 | Parser::ParseAssignmentExprWithObjCMessageExprStart(SourceLocation LBracLoc, |
| 190 | SourceLocation SuperLoc, |
| 191 | ParsedType ReceiverType, |
| 192 | Expr *ReceiverExpr) { |
| 193 | ExprResult R |
| 194 | = ParseObjCMessageExpressionBody(LBracLoc, SuperLoc, |
| 195 | ReceiverType, ReceiverExpr); |
| 196 | R = ParsePostfixExpressionSuffix(R); |
| 197 | return ParseRHSOfBinaryExpression(R, prec::Assignment); |
| 198 | } |
| 199 | |
| 200 | ExprResult |
| 201 | Parser::ParseConstantExpressionInExprEvalContext(TypeCastState isTypeCast) { |
| 202 | assert(Actions.ExprEvalContexts.back().Context ==(static_cast <bool> (Actions.ExprEvalContexts.back().Context == Sema::ExpressionEvaluationContext::ConstantEvaluated && "Call this function only if your ExpressionEvaluationContext is " "already ConstantEvaluated") ? void (0) : __assert_fail ("Actions.ExprEvalContexts.back().Context == Sema::ExpressionEvaluationContext::ConstantEvaluated && \"Call this function only if your ExpressionEvaluationContext is \" \"already ConstantEvaluated\"" , "clang/lib/Parse/ParseExpr.cpp", 205, __extension__ __PRETTY_FUNCTION__ )) |
| 203 | Sema::ExpressionEvaluationContext::ConstantEvaluated &&(static_cast <bool> (Actions.ExprEvalContexts.back().Context == Sema::ExpressionEvaluationContext::ConstantEvaluated && "Call this function only if your ExpressionEvaluationContext is " "already ConstantEvaluated") ? void (0) : __assert_fail ("Actions.ExprEvalContexts.back().Context == Sema::ExpressionEvaluationContext::ConstantEvaluated && \"Call this function only if your ExpressionEvaluationContext is \" \"already ConstantEvaluated\"" , "clang/lib/Parse/ParseExpr.cpp", 205, __extension__ __PRETTY_FUNCTION__ )) |
| 204 | "Call this function only if your ExpressionEvaluationContext is "(static_cast <bool> (Actions.ExprEvalContexts.back().Context == Sema::ExpressionEvaluationContext::ConstantEvaluated && "Call this function only if your ExpressionEvaluationContext is " "already ConstantEvaluated") ? void (0) : __assert_fail ("Actions.ExprEvalContexts.back().Context == Sema::ExpressionEvaluationContext::ConstantEvaluated && \"Call this function only if your ExpressionEvaluationContext is \" \"already ConstantEvaluated\"" , "clang/lib/Parse/ParseExpr.cpp", 205, __extension__ __PRETTY_FUNCTION__ )) |
| 205 | "already ConstantEvaluated")(static_cast <bool> (Actions.ExprEvalContexts.back().Context == Sema::ExpressionEvaluationContext::ConstantEvaluated && "Call this function only if your ExpressionEvaluationContext is " "already ConstantEvaluated") ? void (0) : __assert_fail ("Actions.ExprEvalContexts.back().Context == Sema::ExpressionEvaluationContext::ConstantEvaluated && \"Call this function only if your ExpressionEvaluationContext is \" \"already ConstantEvaluated\"" , "clang/lib/Parse/ParseExpr.cpp", 205, __extension__ __PRETTY_FUNCTION__ )); |
| 206 | ExprResult LHS(ParseCastExpression(AnyCastExpr, false, isTypeCast)); |
| 207 | ExprResult Res(ParseRHSOfBinaryExpression(LHS, prec::Conditional)); |
| 208 | return Actions.ActOnConstantExpression(Res); |
| 209 | } |
| 210 | |
| 211 | ExprResult Parser::ParseConstantExpression(TypeCastState isTypeCast) { |
| 212 | // C++03 [basic.def.odr]p2: |
| 213 | // An expression is potentially evaluated unless it appears where an |
| 214 | // integral constant expression is required (see 5.19) [...]. |
| 215 | // C++98 and C++11 have no such rule, but this is only a defect in C++98. |
| 216 | EnterExpressionEvaluationContext ConstantEvaluated( |
| 217 | Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 218 | return ParseConstantExpressionInExprEvalContext(isTypeCast); |
| 219 | } |
| 220 | |
| 221 | ExprResult Parser::ParseCaseExpression(SourceLocation CaseLoc) { |
| 222 | EnterExpressionEvaluationContext ConstantEvaluated( |
| 223 | Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated); |
| 224 | ExprResult LHS(ParseCastExpression(AnyCastExpr, false, NotTypeCast)); |
| 225 | ExprResult Res(ParseRHSOfBinaryExpression(LHS, prec::Conditional)); |
| 226 | return Actions.ActOnCaseExpr(CaseLoc, Res); |
| 227 | } |
| 228 | |
| 229 | /// Parse a constraint-expression. |
| 230 | /// |
| 231 | /// \verbatim |
| 232 | /// constraint-expression: C++2a[temp.constr.decl]p1 |
| 233 | /// logical-or-expression |
| 234 | /// \endverbatim |
| 235 | ExprResult Parser::ParseConstraintExpression() { |
| 236 | EnterExpressionEvaluationContext ConstantEvaluated( |
| 237 | Actions, Sema::ExpressionEvaluationContext::Unevaluated); |
| 238 | ExprResult LHS(ParseCastExpression(AnyCastExpr)); |
| 239 | ExprResult Res(ParseRHSOfBinaryExpression(LHS, prec::LogicalOr)); |
| 240 | if (Res.isUsable() && !Actions.CheckConstraintExpression(Res.get())) { |
| 241 | Actions.CorrectDelayedTyposInExpr(Res); |
| 242 | return ExprError(); |
| 243 | } |
| 244 | return Res; |
| 245 | } |
| 246 | |
| 247 | /// \brief Parse a constraint-logical-and-expression. |
| 248 | /// |
| 249 | /// \verbatim |
| 250 | /// C++2a[temp.constr.decl]p1 |
| 251 | /// constraint-logical-and-expression: |
| 252 | /// primary-expression |
| 253 | /// constraint-logical-and-expression '&&' primary-expression |
| 254 | /// |
| 255 | /// \endverbatim |
| 256 | ExprResult |
| 257 | Parser::ParseConstraintLogicalAndExpression(bool IsTrailingRequiresClause) { |
| 258 | EnterExpressionEvaluationContext ConstantEvaluated( |
| 259 | Actions, Sema::ExpressionEvaluationContext::Unevaluated); |
| 260 | bool NotPrimaryExpression = false; |
| 261 | auto ParsePrimary = [&] () { |
| 262 | ExprResult E = ParseCastExpression(PrimaryExprOnly, |
| 263 | /*isAddressOfOperand=*/false, |
| 264 | /*isTypeCast=*/NotTypeCast, |
| 265 | /*isVectorLiteral=*/false, |
| 266 | &NotPrimaryExpression); |
| 267 | if (E.isInvalid()) |
| 268 | return ExprError(); |
| 269 | auto RecoverFromNonPrimary = [&] (ExprResult E, bool Note) { |
| 270 | E = ParsePostfixExpressionSuffix(E); |
| 271 | // Use InclusiveOr, the precedence just after '&&' to not parse the |
| 272 | // next arguments to the logical and. |
| 273 | E = ParseRHSOfBinaryExpression(E, prec::InclusiveOr); |
| 274 | if (!E.isInvalid()) |
| 275 | Diag(E.get()->getExprLoc(), |
| 276 | Note |
| 277 | ? diag::note_unparenthesized_non_primary_expr_in_requires_clause |
| 278 | : diag::err_unparenthesized_non_primary_expr_in_requires_clause) |
| 279 | << FixItHint::CreateInsertion(E.get()->getBeginLoc(), "(") |
| 280 | << FixItHint::CreateInsertion( |
| 281 | PP.getLocForEndOfToken(E.get()->getEndLoc()), ")") |
| 282 | << E.get()->getSourceRange(); |
| 283 | return E; |
| 284 | }; |
| 285 | |
| 286 | if (NotPrimaryExpression || |
| 287 | // Check if the following tokens must be a part of a non-primary |
| 288 | // expression |
| 289 | getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator, |
| 290 | /*CPlusPlus11=*/true) > prec::LogicalAnd || |
| 291 | // Postfix operators other than '(' (which will be checked for in |
| 292 | // CheckConstraintExpression). |
| 293 | Tok.isOneOf(tok::period, tok::plusplus, tok::minusminus) || |
| 294 | (Tok.is(tok::l_square) && !NextToken().is(tok::l_square))) { |
| 295 | E = RecoverFromNonPrimary(E, /*Note=*/false); |
| 296 | if (E.isInvalid()) |
| 297 | return ExprError(); |
| 298 | NotPrimaryExpression = false; |
| 299 | } |
| 300 | bool PossibleNonPrimary; |
| 301 | bool IsConstraintExpr = |
| 302 | Actions.CheckConstraintExpression(E.get(), Tok, &PossibleNonPrimary, |
| 303 | IsTrailingRequiresClause); |
| 304 | if (!IsConstraintExpr || PossibleNonPrimary) { |
| 305 | // Atomic constraint might be an unparenthesized non-primary expression |
| 306 | // (such as a binary operator), in which case we might get here (e.g. in |
| 307 | // 'requires 0 + 1 && true' we would now be at '+', and parse and ignore |
| 308 | // the rest of the addition expression). Try to parse the rest of it here. |
| 309 | if (PossibleNonPrimary) |
| 310 | E = RecoverFromNonPrimary(E, /*Note=*/!IsConstraintExpr); |
| 311 | Actions.CorrectDelayedTyposInExpr(E); |
| 312 | return ExprError(); |
| 313 | } |
| 314 | return E; |
| 315 | }; |
| 316 | ExprResult LHS = ParsePrimary(); |
| 317 | if (LHS.isInvalid()) |
| 318 | return ExprError(); |
| 319 | while (Tok.is(tok::ampamp)) { |
| 320 | SourceLocation LogicalAndLoc = ConsumeToken(); |
| 321 | ExprResult RHS = ParsePrimary(); |
| 322 | if (RHS.isInvalid()) { |
| 323 | Actions.CorrectDelayedTyposInExpr(LHS); |
| 324 | return ExprError(); |
| 325 | } |
| 326 | ExprResult Op = Actions.ActOnBinOp(getCurScope(), LogicalAndLoc, |
| 327 | tok::ampamp, LHS.get(), RHS.get()); |
| 328 | if (!Op.isUsable()) { |
| 329 | Actions.CorrectDelayedTyposInExpr(RHS); |
| 330 | Actions.CorrectDelayedTyposInExpr(LHS); |
| 331 | return ExprError(); |
| 332 | } |
| 333 | LHS = Op; |
| 334 | } |
| 335 | return LHS; |
| 336 | } |
| 337 | |
| 338 | /// \brief Parse a constraint-logical-or-expression. |
| 339 | /// |
| 340 | /// \verbatim |
| 341 | /// C++2a[temp.constr.decl]p1 |
| 342 | /// constraint-logical-or-expression: |
| 343 | /// constraint-logical-and-expression |
| 344 | /// constraint-logical-or-expression '||' |
| 345 | /// constraint-logical-and-expression |
| 346 | /// |
| 347 | /// \endverbatim |
| 348 | ExprResult |
| 349 | Parser::ParseConstraintLogicalOrExpression(bool IsTrailingRequiresClause) { |
| 350 | ExprResult LHS(ParseConstraintLogicalAndExpression(IsTrailingRequiresClause)); |
| 351 | if (!LHS.isUsable()) |
| 352 | return ExprError(); |
| 353 | while (Tok.is(tok::pipepipe)) { |
| 354 | SourceLocation LogicalOrLoc = ConsumeToken(); |
| 355 | ExprResult RHS = |
| 356 | ParseConstraintLogicalAndExpression(IsTrailingRequiresClause); |
| 357 | if (!RHS.isUsable()) { |
| 358 | Actions.CorrectDelayedTyposInExpr(LHS); |
| 359 | return ExprError(); |
| 360 | } |
| 361 | ExprResult Op = Actions.ActOnBinOp(getCurScope(), LogicalOrLoc, |
| 362 | tok::pipepipe, LHS.get(), RHS.get()); |
| 363 | if (!Op.isUsable()) { |
| 364 | Actions.CorrectDelayedTyposInExpr(RHS); |
| 365 | Actions.CorrectDelayedTyposInExpr(LHS); |
| 366 | return ExprError(); |
| 367 | } |
| 368 | LHS = Op; |
| 369 | } |
| 370 | return LHS; |
| 371 | } |
| 372 | |
| 373 | bool Parser::isNotExpressionStart() { |
| 374 | tok::TokenKind K = Tok.getKind(); |
| 375 | if (K == tok::l_brace || K == tok::r_brace || |
| 376 | K == tok::kw_for || K == tok::kw_while || |
| 377 | K == tok::kw_if || K == tok::kw_else || |
| 378 | K == tok::kw_goto || K == tok::kw_try) |
| 379 | return true; |
| 380 | // If this is a decl-specifier, we can't be at the start of an expression. |
| 381 | return isKnownToBeDeclarationSpecifier(); |
| 382 | } |
| 383 | |
| 384 | bool Parser::isFoldOperator(prec::Level Level) const { |
| 385 | return Level > prec::Unknown && Level != prec::Conditional && |
| 386 | Level != prec::Spaceship; |
| 387 | } |
| 388 | |
| 389 | bool Parser::isFoldOperator(tok::TokenKind Kind) const { |
| 390 | return isFoldOperator(getBinOpPrecedence(Kind, GreaterThanIsOperator, true)); |
| 391 | } |
| 392 | |
| 393 | /// Parse a binary expression that starts with \p LHS and has a |
| 394 | /// precedence of at least \p MinPrec. |
| 395 | ExprResult |
| 396 | Parser::ParseRHSOfBinaryExpression(ExprResult LHS, prec::Level MinPrec) { |
| 397 | prec::Level NextTokPrec = getBinOpPrecedence(Tok.getKind(), |
| 398 | GreaterThanIsOperator, |
| 399 | getLangOpts().CPlusPlus11); |
| 400 | SourceLocation ColonLoc; |
| 401 | |
| 402 | auto SavedType = PreferredType; |
| 403 | while (true) { |
| 404 | // Every iteration may rely on a preferred type for the whole expression. |
| 405 | PreferredType = SavedType; |
| 406 | // If this token has a lower precedence than we are allowed to parse (e.g. |
| 407 | // because we are called recursively, or because the token is not a binop), |
| 408 | // then we are done! |
| 409 | if (NextTokPrec < MinPrec) |
| 410 | return LHS; |
| 411 | |
| 412 | // Consume the operator, saving the operator token for error reporting. |
| 413 | Token OpToken = Tok; |
| 414 | ConsumeToken(); |
| 415 | |
| 416 | if (OpToken.is(tok::caretcaret)) { |
| 417 | return ExprError(Diag(Tok, diag::err_opencl_logical_exclusive_or)); |
| 418 | } |
| 419 | |
| 420 | // If we're potentially in a template-id, we may now be able to determine |
| 421 | // whether we're actually in one or not. |
| 422 | if (OpToken.isOneOf(tok::comma, tok::greater, tok::greatergreater, |
| 423 | tok::greatergreatergreater) && |
| 424 | checkPotentialAngleBracketDelimiter(OpToken)) |
| 425 | return ExprError(); |
| 426 | |
| 427 | // Bail out when encountering a comma followed by a token which can't |
| 428 | // possibly be the start of an expression. For instance: |
| 429 | // int f() { return 1, } |
| 430 | // We can't do this before consuming the comma, because |
| 431 | // isNotExpressionStart() looks at the token stream. |
| 432 | if (OpToken.is(tok::comma) && isNotExpressionStart()) { |
| 433 | PP.EnterToken(Tok, /*IsReinject*/true); |
| 434 | Tok = OpToken; |
| 435 | return LHS; |
| 436 | } |
| 437 | |
| 438 | // If the next token is an ellipsis, then this is a fold-expression. Leave |
| 439 | // it alone so we can handle it in the paren expression. |
| 440 | if (isFoldOperator(NextTokPrec) && Tok.is(tok::ellipsis)) { |
| 441 | // FIXME: We can't check this via lookahead before we consume the token |
| 442 | // because that tickles a lexer bug. |
| 443 | PP.EnterToken(Tok, /*IsReinject*/true); |
| 444 | Tok = OpToken; |
| 445 | return LHS; |
| 446 | } |
| 447 | |
| 448 | // In Objective-C++, alternative operator tokens can be used as keyword args |
| 449 | // in message expressions. Unconsume the token so that it can reinterpreted |
| 450 | // as an identifier in ParseObjCMessageExpressionBody. i.e., we support: |
| 451 | // [foo meth:0 and:0]; |
| 452 | // [foo not_eq]; |
| 453 | if (getLangOpts().ObjC && getLangOpts().CPlusPlus && |
| 454 | Tok.isOneOf(tok::colon, tok::r_square) && |
| 455 | OpToken.getIdentifierInfo() != nullptr) { |
| 456 | PP.EnterToken(Tok, /*IsReinject*/true); |
| 457 | Tok = OpToken; |
| 458 | return LHS; |
| 459 | } |
| 460 | |
| 461 | // Special case handling for the ternary operator. |
| 462 | ExprResult TernaryMiddle(true); |
| 463 | if (NextTokPrec == prec::Conditional) { |
| 464 | if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) { |
| 465 | // Parse a braced-init-list here for error recovery purposes. |
| 466 | SourceLocation BraceLoc = Tok.getLocation(); |
| 467 | TernaryMiddle = ParseBraceInitializer(); |
| 468 | if (!TernaryMiddle.isInvalid()) { |
| 469 | Diag(BraceLoc, diag::err_init_list_bin_op) |
| 470 | << /*RHS*/ 1 << PP.getSpelling(OpToken) |
| 471 | << Actions.getExprRange(TernaryMiddle.get()); |
| 472 | TernaryMiddle = ExprError(); |
| 473 | } |
| 474 | } else if (Tok.isNot(tok::colon)) { |
| 475 | // Don't parse FOO:BAR as if it were a typo for FOO::BAR. |
| 476 | ColonProtectionRAIIObject X(*this); |
| 477 | |
| 478 | // Handle this production specially: |
| 479 | // logical-OR-expression '?' expression ':' conditional-expression |
| 480 | // In particular, the RHS of the '?' is 'expression', not |
| 481 | // 'logical-OR-expression' as we might expect. |
| 482 | TernaryMiddle = ParseExpression(); |
| 483 | } else { |
| 484 | // Special case handling of "X ? Y : Z" where Y is empty: |
| 485 | // logical-OR-expression '?' ':' conditional-expression [GNU] |
| 486 | TernaryMiddle = nullptr; |
| 487 | Diag(Tok, diag::ext_gnu_conditional_expr); |
| 488 | } |
| 489 | |
| 490 | if (TernaryMiddle.isInvalid()) { |
| 491 | Actions.CorrectDelayedTyposInExpr(LHS); |
| 492 | LHS = ExprError(); |
| 493 | TernaryMiddle = nullptr; |
| 494 | } |
| 495 | |
| 496 | if (!TryConsumeToken(tok::colon, ColonLoc)) { |
| 497 | // Otherwise, we're missing a ':'. Assume that this was a typo that |
| 498 | // the user forgot. If we're not in a macro expansion, we can suggest |
| 499 | // a fixit hint. If there were two spaces before the current token, |
| 500 | // suggest inserting the colon in between them, otherwise insert ": ". |
| 501 | SourceLocation FILoc = Tok.getLocation(); |
| 502 | const char *FIText = ": "; |
| 503 | const SourceManager &SM = PP.getSourceManager(); |
| 504 | if (FILoc.isFileID() || PP.isAtStartOfMacroExpansion(FILoc, &FILoc)) { |
| 505 | assert(FILoc.isFileID())(static_cast <bool> (FILoc.isFileID()) ? void (0) : __assert_fail ("FILoc.isFileID()", "clang/lib/Parse/ParseExpr.cpp", 505, __extension__ __PRETTY_FUNCTION__)); |
| 506 | bool IsInvalid = false; |
| 507 | const char *SourcePtr = |
| 508 | SM.getCharacterData(FILoc.getLocWithOffset(-1), &IsInvalid); |
| 509 | if (!IsInvalid && *SourcePtr == ' ') { |
| 510 | SourcePtr = |
| 511 | SM.getCharacterData(FILoc.getLocWithOffset(-2), &IsInvalid); |
| 512 | if (!IsInvalid && *SourcePtr == ' ') { |
| 513 | FILoc = FILoc.getLocWithOffset(-1); |
| 514 | FIText = ":"; |
| 515 | } |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | Diag(Tok, diag::err_expected) |
| 520 | << tok::colon << FixItHint::CreateInsertion(FILoc, FIText); |
| 521 | Diag(OpToken, diag::note_matching) << tok::question; |
| 522 | ColonLoc = Tok.getLocation(); |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | PreferredType.enterBinary(Actions, Tok.getLocation(), LHS.get(), |
| 527 | OpToken.getKind()); |
| 528 | // Parse another leaf here for the RHS of the operator. |
| 529 | // ParseCastExpression works here because all RHS expressions in C have it |
| 530 | // as a prefix, at least. However, in C++, an assignment-expression could |
| 531 | // be a throw-expression, which is not a valid cast-expression. |
| 532 | // Therefore we need some special-casing here. |
| 533 | // Also note that the third operand of the conditional operator is |
| 534 | // an assignment-expression in C++, and in C++11, we can have a |
| 535 | // braced-init-list on the RHS of an assignment. For better diagnostics, |
| 536 | // parse as if we were allowed braced-init-lists everywhere, and check that |
| 537 | // they only appear on the RHS of assignments later. |
| 538 | ExprResult RHS; |
| 539 | bool RHSIsInitList = false; |
| 540 | if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) { |
| 541 | RHS = ParseBraceInitializer(); |
| 542 | RHSIsInitList = true; |
| 543 | } else if (getLangOpts().CPlusPlus && NextTokPrec <= prec::Conditional) |
| 544 | RHS = ParseAssignmentExpression(); |
| 545 | else |
| 546 | RHS = ParseCastExpression(AnyCastExpr); |
| 547 | |
| 548 | if (RHS.isInvalid()) { |
| 549 | // FIXME: Errors generated by the delayed typo correction should be |
| 550 | // printed before errors from parsing the RHS, not after. |
| 551 | Actions.CorrectDelayedTyposInExpr(LHS); |
| 552 | if (TernaryMiddle.isUsable()) |
| 553 | TernaryMiddle = Actions.CorrectDelayedTyposInExpr(TernaryMiddle); |
| 554 | LHS = ExprError(); |
| 555 | } |
| 556 | |
| 557 | // Remember the precedence of this operator and get the precedence of the |
| 558 | // operator immediately to the right of the RHS. |
| 559 | prec::Level ThisPrec = NextTokPrec; |
| 560 | NextTokPrec = getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator, |
| 561 | getLangOpts().CPlusPlus11); |
| 562 | |
| 563 | // Assignment and conditional expressions are right-associative. |
| 564 | bool isRightAssoc = ThisPrec == prec::Conditional || |
| 565 | ThisPrec == prec::Assignment; |
| 566 | |
| 567 | // Get the precedence of the operator to the right of the RHS. If it binds |
| 568 | // more tightly with RHS than we do, evaluate it completely first. |
| 569 | if (ThisPrec < NextTokPrec || |
| 570 | (ThisPrec == NextTokPrec && isRightAssoc)) { |
| 571 | if (!RHS.isInvalid() && RHSIsInitList) { |
| 572 | Diag(Tok, diag::err_init_list_bin_op) |
| 573 | << /*LHS*/0 << PP.getSpelling(Tok) << Actions.getExprRange(RHS.get()); |
| 574 | RHS = ExprError(); |
| 575 | } |
| 576 | // If this is left-associative, only parse things on the RHS that bind |
| 577 | // more tightly than the current operator. If it is left-associative, it |
| 578 | // is okay, to bind exactly as tightly. For example, compile A=B=C=D as |
| 579 | // A=(B=(C=D)), where each paren is a level of recursion here. |
| 580 | // The function takes ownership of the RHS. |
| 581 | RHS = ParseRHSOfBinaryExpression(RHS, |
| 582 | static_cast<prec::Level>(ThisPrec + !isRightAssoc)); |
| 583 | RHSIsInitList = false; |
| 584 | |
| 585 | if (RHS.isInvalid()) { |
| 586 | // FIXME: Errors generated by the delayed typo correction should be |
| 587 | // printed before errors from ParseRHSOfBinaryExpression, not after. |
| 588 | Actions.CorrectDelayedTyposInExpr(LHS); |
| 589 | if (TernaryMiddle.isUsable()) |
| 590 | TernaryMiddle = Actions.CorrectDelayedTyposInExpr(TernaryMiddle); |
| 591 | LHS = ExprError(); |
| 592 | } |
| 593 | |
| 594 | NextTokPrec = getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator, |
| 595 | getLangOpts().CPlusPlus11); |
| 596 | } |
| 597 | |
| 598 | if (!RHS.isInvalid() && RHSIsInitList) { |
| 599 | if (ThisPrec == prec::Assignment) { |
| 600 | Diag(OpToken, diag::warn_cxx98_compat_generalized_initializer_lists) |
| 601 | << Actions.getExprRange(RHS.get()); |
| 602 | } else if (ColonLoc.isValid()) { |
| 603 | Diag(ColonLoc, diag::err_init_list_bin_op) |
| 604 | << /*RHS*/1 << ":" |
| 605 | << Actions.getExprRange(RHS.get()); |
| 606 | LHS = ExprError(); |
| 607 | } else { |
| 608 | Diag(OpToken, diag::err_init_list_bin_op) |
| 609 | << /*RHS*/1 << PP.getSpelling(OpToken) |
| 610 | << Actions.getExprRange(RHS.get()); |
| 611 | LHS = ExprError(); |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | ExprResult OrigLHS = LHS; |
| 616 | if (!LHS.isInvalid()) { |
| 617 | // Combine the LHS and RHS into the LHS (e.g. build AST). |
| 618 | if (TernaryMiddle.isInvalid()) { |
| 619 | // If we're using '>>' as an operator within a template |
| 620 | // argument list (in C++98), suggest the addition of |
| 621 | // parentheses so that the code remains well-formed in C++0x. |
| 622 | if (!GreaterThanIsOperator && OpToken.is(tok::greatergreater)) |
| 623 | SuggestParentheses(OpToken.getLocation(), |
| 624 | diag::warn_cxx11_right_shift_in_template_arg, |
| 625 | SourceRange(Actions.getExprRange(LHS.get()).getBegin(), |
| 626 | Actions.getExprRange(RHS.get()).getEnd())); |
| 627 | |
| 628 | ExprResult BinOp = |
| 629 | Actions.ActOnBinOp(getCurScope(), OpToken.getLocation(), |
| 630 | OpToken.getKind(), LHS.get(), RHS.get()); |
| 631 | if (BinOp.isInvalid()) |
| 632 | BinOp = Actions.CreateRecoveryExpr(LHS.get()->getBeginLoc(), |
| 633 | RHS.get()->getEndLoc(), |
| 634 | {LHS.get(), RHS.get()}); |
| 635 | |
| 636 | LHS = BinOp; |
| 637 | } else { |
| 638 | ExprResult CondOp = Actions.ActOnConditionalOp( |
| 639 | OpToken.getLocation(), ColonLoc, LHS.get(), TernaryMiddle.get(), |
| 640 | RHS.get()); |
| 641 | if (CondOp.isInvalid()) { |
| 642 | std::vector<clang::Expr *> Args; |
| 643 | // TernaryMiddle can be null for the GNU conditional expr extension. |
| 644 | if (TernaryMiddle.get()) |
| 645 | Args = {LHS.get(), TernaryMiddle.get(), RHS.get()}; |
| 646 | else |
| 647 | Args = {LHS.get(), RHS.get()}; |
| 648 | CondOp = Actions.CreateRecoveryExpr(LHS.get()->getBeginLoc(), |
| 649 | RHS.get()->getEndLoc(), Args); |
| 650 | } |
| 651 | |
| 652 | LHS = CondOp; |
| 653 | } |
| 654 | // In this case, ActOnBinOp or ActOnConditionalOp performed the |
| 655 | // CorrectDelayedTyposInExpr check. |
| 656 | if (!getLangOpts().CPlusPlus) |
| 657 | continue; |
| 658 | } |
| 659 | |
| 660 | // Ensure potential typos aren't left undiagnosed. |
| 661 | if (LHS.isInvalid()) { |
| 662 | Actions.CorrectDelayedTyposInExpr(OrigLHS); |
| 663 | Actions.CorrectDelayedTyposInExpr(TernaryMiddle); |
| 664 | Actions.CorrectDelayedTyposInExpr(RHS); |
| 665 | } |
| 666 | } |
| 667 | } |
| 668 | |
| 669 | /// Parse a cast-expression, unary-expression or primary-expression, based |
| 670 | /// on \p ExprType. |
| 671 | /// |
| 672 | /// \p isAddressOfOperand exists because an id-expression that is the |
| 673 | /// operand of address-of gets special treatment due to member pointers. |
| 674 | /// |
| 675 | ExprResult Parser::ParseCastExpression(CastParseKind ParseKind, |
| 676 | bool isAddressOfOperand, |
| 677 | TypeCastState isTypeCast, |
| 678 | bool isVectorLiteral, |
| 679 | bool *NotPrimaryExpression) { |
| 680 | bool NotCastExpr; |
| 681 | ExprResult Res = ParseCastExpression(ParseKind, |
| 682 | isAddressOfOperand, |
| 683 | NotCastExpr, |
| 684 | isTypeCast, |
| 685 | isVectorLiteral, |
| 686 | NotPrimaryExpression); |
| 687 | if (NotCastExpr) |
| 688 | Diag(Tok, diag::err_expected_expression); |
| 689 | return Res; |
| 690 | } |
| 691 | |
| 692 | namespace { |
| 693 | class CastExpressionIdValidator final : public CorrectionCandidateCallback { |
| 694 | public: |
| 695 | CastExpressionIdValidator(Token Next, bool AllowTypes, bool AllowNonTypes) |
| 696 | : NextToken(Next), AllowNonTypes(AllowNonTypes) { |
| 697 | WantTypeSpecifiers = WantFunctionLikeCasts = AllowTypes; |
| 698 | } |
| 699 | |
| 700 | bool ValidateCandidate(const TypoCorrection &candidate) override { |
| 701 | NamedDecl *ND = candidate.getCorrectionDecl(); |
| 702 | if (!ND) |
| 703 | return candidate.isKeyword(); |
| 704 | |
| 705 | if (isa<TypeDecl>(ND)) |
| 706 | return WantTypeSpecifiers; |
| 707 | |
| 708 | if (!AllowNonTypes || !CorrectionCandidateCallback::ValidateCandidate(candidate)) |
| 709 | return false; |
| 710 | |
| 711 | if (!NextToken.isOneOf(tok::equal, tok::arrow, tok::period)) |
| 712 | return true; |
| 713 | |
| 714 | for (auto *C : candidate) { |
| 715 | NamedDecl *ND = C->getUnderlyingDecl(); |
| 716 | if (isa<ValueDecl>(ND) && !isa<FunctionDecl>(ND)) |
| 717 | return true; |
| 718 | } |
| 719 | return false; |
| 720 | } |
| 721 | |
| 722 | std::unique_ptr<CorrectionCandidateCallback> clone() override { |
| 723 | return std::make_unique<CastExpressionIdValidator>(*this); |
| 724 | } |
| 725 | |
| 726 | private: |
| 727 | Token NextToken; |
| 728 | bool AllowNonTypes; |
| 729 | }; |
| 730 | } |
| 731 | |
| 732 | /// Parse a cast-expression, or, if \pisUnaryExpression is true, parse |
| 733 | /// a unary-expression. |
| 734 | /// |
| 735 | /// \p isAddressOfOperand exists because an id-expression that is the operand |
| 736 | /// of address-of gets special treatment due to member pointers. NotCastExpr |
| 737 | /// is set to true if the token is not the start of a cast-expression, and no |
| 738 | /// diagnostic is emitted in this case and no tokens are consumed. |
| 739 | /// |
| 740 | /// \verbatim |
| 741 | /// cast-expression: [C99 6.5.4] |
| 742 | /// unary-expression |
| 743 | /// '(' type-name ')' cast-expression |
| 744 | /// |
| 745 | /// unary-expression: [C99 6.5.3] |
| 746 | /// postfix-expression |
| 747 | /// '++' unary-expression |
| 748 | /// '--' unary-expression |
| 749 | /// [Coro] 'co_await' cast-expression |
| 750 | /// unary-operator cast-expression |
| 751 | /// 'sizeof' unary-expression |
| 752 | /// 'sizeof' '(' type-name ')' |
| 753 | /// [C++11] 'sizeof' '...' '(' identifier ')' |
| 754 | /// [GNU] '__alignof' unary-expression |
| 755 | /// [GNU] '__alignof' '(' type-name ')' |
| 756 | /// [C11] '_Alignof' '(' type-name ')' |
| 757 | /// [C++11] 'alignof' '(' type-id ')' |
| 758 | /// [GNU] '&&' identifier |
| 759 | /// [C++11] 'noexcept' '(' expression ')' [C++11 5.3.7] |
| 760 | /// [C++] new-expression |
| 761 | /// [C++] delete-expression |
| 762 | /// |
| 763 | /// unary-operator: one of |
| 764 | /// '&' '*' '+' '-' '~' '!' |
| 765 | /// [GNU] '__extension__' '__real' '__imag' |
| 766 | /// |
| 767 | /// primary-expression: [C99 6.5.1] |
| 768 | /// [C99] identifier |
| 769 | /// [C++] id-expression |
| 770 | /// constant |
| 771 | /// string-literal |
| 772 | /// [C++] boolean-literal [C++ 2.13.5] |
| 773 | /// [C++11] 'nullptr' [C++11 2.14.7] |
| 774 | /// [C++11] user-defined-literal |
| 775 | /// '(' expression ')' |
| 776 | /// [C11] generic-selection |
| 777 | /// [C++2a] requires-expression |
| 778 | /// '__func__' [C99 6.4.2.2] |
| 779 | /// [GNU] '__FUNCTION__' |
| 780 | /// [MS] '__FUNCDNAME__' |
| 781 | /// [MS] 'L__FUNCTION__' |
| 782 | /// [MS] '__FUNCSIG__' |
| 783 | /// [MS] 'L__FUNCSIG__' |
| 784 | /// [GNU] '__PRETTY_FUNCTION__' |
| 785 | /// [GNU] '(' compound-statement ')' |
| 786 | /// [GNU] '__builtin_va_arg' '(' assignment-expression ',' type-name ')' |
| 787 | /// [GNU] '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')' |
| 788 | /// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ',' |
| 789 | /// assign-expr ')' |
| 790 | /// [GNU] '__builtin_FILE' '(' ')' |
| 791 | /// [GNU] '__builtin_FUNCTION' '(' ')' |
| 792 | /// [GNU] '__builtin_LINE' '(' ')' |
| 793 | /// [CLANG] '__builtin_COLUMN' '(' ')' |
| 794 | /// [GNU] '__builtin_source_location' '(' ')' |
| 795 | /// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')' |
| 796 | /// [GNU] '__null' |
| 797 | /// [OBJC] '[' objc-message-expr ']' |
| 798 | /// [OBJC] '\@selector' '(' objc-selector-arg ')' |
| 799 | /// [OBJC] '\@protocol' '(' identifier ')' |
| 800 | /// [OBJC] '\@encode' '(' type-name ')' |
| 801 | /// [OBJC] objc-string-literal |
| 802 | /// [C++] simple-type-specifier '(' expression-list[opt] ')' [C++ 5.2.3] |
| 803 | /// [C++11] simple-type-specifier braced-init-list [C++11 5.2.3] |
| 804 | /// [C++] typename-specifier '(' expression-list[opt] ')' [C++ 5.2.3] |
| 805 | /// [C++11] typename-specifier braced-init-list [C++11 5.2.3] |
| 806 | /// [C++] 'const_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
| 807 | /// [C++] 'dynamic_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
| 808 | /// [C++] 'reinterpret_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
| 809 | /// [C++] 'static_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
| 810 | /// [C++] 'typeid' '(' expression ')' [C++ 5.2p1] |
| 811 | /// [C++] 'typeid' '(' type-id ')' [C++ 5.2p1] |
| 812 | /// [C++] 'this' [C++ 9.3.2] |
| 813 | /// [G++] unary-type-trait '(' type-id ')' |
| 814 | /// [G++] binary-type-trait '(' type-id ',' type-id ')' [TODO] |
| 815 | /// [EMBT] array-type-trait '(' type-id ',' integer ')' |
| 816 | /// [clang] '^' block-literal |
| 817 | /// |
| 818 | /// constant: [C99 6.4.4] |
| 819 | /// integer-constant |
| 820 | /// floating-constant |
| 821 | /// enumeration-constant -> identifier |
| 822 | /// character-constant |
| 823 | /// |
| 824 | /// id-expression: [C++ 5.1] |
| 825 | /// unqualified-id |
| 826 | /// qualified-id |
| 827 | /// |
| 828 | /// unqualified-id: [C++ 5.1] |
| 829 | /// identifier |
| 830 | /// operator-function-id |
| 831 | /// conversion-function-id |
| 832 | /// '~' class-name |
| 833 | /// template-id |
| 834 | /// |
| 835 | /// new-expression: [C++ 5.3.4] |
| 836 | /// '::'[opt] 'new' new-placement[opt] new-type-id |
| 837 | /// new-initializer[opt] |
| 838 | /// '::'[opt] 'new' new-placement[opt] '(' type-id ')' |
| 839 | /// new-initializer[opt] |
| 840 | /// |
| 841 | /// delete-expression: [C++ 5.3.5] |
| 842 | /// '::'[opt] 'delete' cast-expression |
| 843 | /// '::'[opt] 'delete' '[' ']' cast-expression |
| 844 | /// |
| 845 | /// [GNU/Embarcadero] unary-type-trait: |
| 846 | /// '__is_arithmetic' |
| 847 | /// '__is_floating_point' |
| 848 | /// '__is_integral' |
| 849 | /// '__is_lvalue_expr' |
| 850 | /// '__is_rvalue_expr' |
| 851 | /// '__is_complete_type' |
| 852 | /// '__is_void' |
| 853 | /// '__is_array' |
| 854 | /// '__is_function' |
| 855 | /// '__is_reference' |
| 856 | /// '__is_lvalue_reference' |
| 857 | /// '__is_rvalue_reference' |
| 858 | /// '__is_fundamental' |
| 859 | /// '__is_object' |
| 860 | /// '__is_scalar' |
| 861 | /// '__is_compound' |
| 862 | /// '__is_pointer' |
| 863 | /// '__is_member_object_pointer' |
| 864 | /// '__is_member_function_pointer' |
| 865 | /// '__is_member_pointer' |
| 866 | /// '__is_const' |
| 867 | /// '__is_volatile' |
| 868 | /// '__is_trivial' |
| 869 | /// '__is_standard_layout' |
| 870 | /// '__is_signed' |
| 871 | /// '__is_unsigned' |
| 872 | /// |
| 873 | /// [GNU] unary-type-trait: |
| 874 | /// '__has_nothrow_assign' |
| 875 | /// '__has_nothrow_copy' |
| 876 | /// '__has_nothrow_constructor' |
| 877 | /// '__has_trivial_assign' [TODO] |
| 878 | /// '__has_trivial_copy' [TODO] |
| 879 | /// '__has_trivial_constructor' |
| 880 | /// '__has_trivial_destructor' |
| 881 | /// '__has_virtual_destructor' |
| 882 | /// '__is_abstract' [TODO] |
| 883 | /// '__is_class' |
| 884 | /// '__is_empty' [TODO] |
| 885 | /// '__is_enum' |
| 886 | /// '__is_final' |
| 887 | /// '__is_pod' |
| 888 | /// '__is_polymorphic' |
| 889 | /// '__is_sealed' [MS] |
| 890 | /// '__is_trivial' |
| 891 | /// '__is_union' |
| 892 | /// '__has_unique_object_representations' |
| 893 | /// |
| 894 | /// [Clang] unary-type-trait: |
| 895 | /// '__is_aggregate' |
| 896 | /// '__trivially_copyable' |
| 897 | /// |
| 898 | /// binary-type-trait: |
| 899 | /// [GNU] '__is_base_of' |
| 900 | /// [MS] '__is_convertible_to' |
| 901 | /// '__is_convertible' |
| 902 | /// '__is_same' |
| 903 | /// |
| 904 | /// [Embarcadero] array-type-trait: |
| 905 | /// '__array_rank' |
| 906 | /// '__array_extent' |
| 907 | /// |
| 908 | /// [Embarcadero] expression-trait: |
| 909 | /// '__is_lvalue_expr' |
| 910 | /// '__is_rvalue_expr' |
| 911 | /// \endverbatim |
| 912 | /// |
| 913 | ExprResult Parser::ParseCastExpression(CastParseKind ParseKind, |
| 914 | bool isAddressOfOperand, |
| 915 | bool &NotCastExpr, |
| 916 | TypeCastState isTypeCast, |
| 917 | bool isVectorLiteral, |
| 918 | bool *NotPrimaryExpression) { |
| 919 | ExprResult Res; |
| 920 | tok::TokenKind SavedKind = Tok.getKind(); |
| 921 | auto SavedType = PreferredType; |
| 922 | NotCastExpr = false; |
| 923 | |
| 924 | // Are postfix-expression suffix operators permitted after this |
| 925 | // cast-expression? If not, and we find some, we'll parse them anyway and |
| 926 | // diagnose them. |
| 927 | bool AllowSuffix = true; |
| 928 | |
| 929 | // This handles all of cast-expression, unary-expression, postfix-expression, |
| 930 | // and primary-expression. We handle them together like this for efficiency |
| 931 | // and to simplify handling of an expression starting with a '(' token: which |
| 932 | // may be one of a parenthesized expression, cast-expression, compound literal |
| 933 | // expression, or statement expression. |
| 934 | // |
| 935 | // If the parsed tokens consist of a primary-expression, the cases below |
| 936 | // break out of the switch; at the end we call ParsePostfixExpressionSuffix |
| 937 | // to handle the postfix expression suffixes. Cases that cannot be followed |
| 938 | // by postfix exprs should set AllowSuffix to false. |
| 939 | switch (SavedKind) { |
| 940 | case tok::l_paren: { |
| 941 | // If this expression is limited to being a unary-expression, the paren can |
| 942 | // not start a cast expression. |
| 943 | ParenParseOption ParenExprType; |
| 944 | switch (ParseKind) { |
| 945 | case CastParseKind::UnaryExprOnly: |
| 946 | if (!getLangOpts().CPlusPlus) |
| 947 | ParenExprType = CompoundLiteral; |
Value stored to 'ParenExprType' is never read | |
| 948 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
| 949 | case CastParseKind::AnyCastExpr: |
| 950 | ParenExprType = ParenParseOption::CastExpr; |
| 951 | break; |
| 952 | case CastParseKind::PrimaryExprOnly: |
| 953 | ParenExprType = FoldExpr; |
| 954 | break; |
| 955 | } |
| 956 | ParsedType CastTy; |
| 957 | SourceLocation RParenLoc; |
| 958 | Res = ParseParenExpression(ParenExprType, false/*stopIfCastExr*/, |
| 959 | isTypeCast == IsTypeCast, CastTy, RParenLoc); |
| 960 | |
| 961 | // FIXME: What should we do if a vector literal is followed by a |
| 962 | // postfix-expression suffix? Usually postfix operators are permitted on |
| 963 | // literals. |
| 964 | if (isVectorLiteral) |
| 965 | return Res; |
| 966 | |
| 967 | switch (ParenExprType) { |
| 968 | case SimpleExpr: break; // Nothing else to do. |
| 969 | case CompoundStmt: break; // Nothing else to do. |
| 970 | case CompoundLiteral: |
| 971 | // We parsed '(' type-name ')' '{' ... '}'. If any suffixes of |
| 972 | // postfix-expression exist, parse them now. |
| 973 | break; |
| 974 | case CastExpr: |
| 975 | // We have parsed the cast-expression and no postfix-expr pieces are |
| 976 | // following. |
| 977 | return Res; |
| 978 | case FoldExpr: |
| 979 | // We only parsed a fold-expression. There might be postfix-expr pieces |
| 980 | // afterwards; parse them now. |
| 981 | break; |
| 982 | } |
| 983 | |
| 984 | break; |
| 985 | } |
| 986 | |
| 987 | // primary-expression |
| 988 | case tok::numeric_constant: |
| 989 | // constant: integer-constant |
| 990 | // constant: floating-constant |
| 991 | |
| 992 | Res = Actions.ActOnNumericConstant(Tok, /*UDLScope*/getCurScope()); |
| 993 | ConsumeToken(); |
| 994 | break; |
| 995 | |
| 996 | case tok::kw_true: |
| 997 | case tok::kw_false: |
| 998 | Res = ParseCXXBoolLiteral(); |
| 999 | break; |
| 1000 | |
| 1001 | case tok::kw___objc_yes: |
| 1002 | case tok::kw___objc_no: |
| 1003 | Res = ParseObjCBoolLiteral(); |
| 1004 | break; |
| 1005 | |
| 1006 | case tok::kw_nullptr: |
| 1007 | Diag(Tok, diag::warn_cxx98_compat_nullptr); |
| 1008 | Res = Actions.ActOnCXXNullPtrLiteral(ConsumeToken()); |
| 1009 | break; |
| 1010 | |
| 1011 | case tok::annot_primary_expr: |
| 1012 | case tok::annot_overload_set: |
| 1013 | Res = getExprAnnotation(Tok); |
| 1014 | if (!Res.isInvalid() && Tok.getKind() == tok::annot_overload_set) |
| 1015 | Res = Actions.ActOnNameClassifiedAsOverloadSet(getCurScope(), Res.get()); |
| 1016 | ConsumeAnnotationToken(); |
| 1017 | if (!Res.isInvalid() && Tok.is(tok::less)) |
| 1018 | checkPotentialAngleBracket(Res); |
| 1019 | break; |
| 1020 | |
| 1021 | case tok::annot_non_type: |
| 1022 | case tok::annot_non_type_dependent: |
| 1023 | case tok::annot_non_type_undeclared: { |
| 1024 | CXXScopeSpec SS; |
| 1025 | Token Replacement; |
| 1026 | Res = tryParseCXXIdExpression(SS, isAddressOfOperand, Replacement); |
| 1027 | assert(!Res.isUnset() &&(static_cast <bool> (!Res.isUnset() && "should not perform typo correction on annotation token" ) ? void (0) : __assert_fail ("!Res.isUnset() && \"should not perform typo correction on annotation token\"" , "clang/lib/Parse/ParseExpr.cpp", 1028, __extension__ __PRETTY_FUNCTION__ )) |
| 1028 | "should not perform typo correction on annotation token")(static_cast <bool> (!Res.isUnset() && "should not perform typo correction on annotation token" ) ? void (0) : __assert_fail ("!Res.isUnset() && \"should not perform typo correction on annotation token\"" , "clang/lib/Parse/ParseExpr.cpp", 1028, __extension__ __PRETTY_FUNCTION__ )); |
| 1029 | break; |
| 1030 | } |
| 1031 | |
| 1032 | case tok::kw___super: |
| 1033 | case tok::kw_decltype: |
| 1034 | // Annotate the token and tail recurse. |
| 1035 | if (TryAnnotateTypeOrScopeToken()) |
| 1036 | return ExprError(); |
| 1037 | assert(Tok.isNot(tok::kw_decltype) && Tok.isNot(tok::kw___super))(static_cast <bool> (Tok.isNot(tok::kw_decltype) && Tok.isNot(tok::kw___super)) ? void (0) : __assert_fail ("Tok.isNot(tok::kw_decltype) && Tok.isNot(tok::kw___super)" , "clang/lib/Parse/ParseExpr.cpp", 1037, __extension__ __PRETTY_FUNCTION__ )); |
| 1038 | return ParseCastExpression(ParseKind, isAddressOfOperand, isTypeCast, |
| 1039 | isVectorLiteral, NotPrimaryExpression); |
| 1040 | |
| 1041 | case tok::identifier: { // primary-expression: identifier |
| 1042 | // unqualified-id: identifier |
| 1043 | // constant: enumeration-constant |
| 1044 | // Turn a potentially qualified name into a annot_typename or |
| 1045 | // annot_cxxscope if it would be valid. This handles things like x::y, etc. |
| 1046 | if (getLangOpts().CPlusPlus) { |
| 1047 | // Avoid the unnecessary parse-time lookup in the common case |
| 1048 | // where the syntax forbids a type. |
| 1049 | const Token &Next = NextToken(); |
| 1050 | |
| 1051 | // If this identifier was reverted from a token ID, and the next token |
| 1052 | // is a parenthesis, this is likely to be a use of a type trait. Check |
| 1053 | // those tokens. |
| 1054 | if (Next.is(tok::l_paren) && |
| 1055 | Tok.is(tok::identifier) && |
| 1056 | Tok.getIdentifierInfo()->hasRevertedTokenIDToIdentifier()) { |
| 1057 | IdentifierInfo *II = Tok.getIdentifierInfo(); |
| 1058 | // Build up the mapping of revertible type traits, for future use. |
| 1059 | if (RevertibleTypeTraits.empty()) { |
| 1060 | #define RTT_JOIN(X,Y) X##Y |
| 1061 | #define REVERTIBLE_TYPE_TRAIT(Name) \ |
| 1062 | RevertibleTypeTraits[PP.getIdentifierInfo(#Name)] \ |
| 1063 | = RTT_JOIN(tok::kw_,Name) |
| 1064 | |
| 1065 | REVERTIBLE_TYPE_TRAIT(__is_abstract); |
| 1066 | REVERTIBLE_TYPE_TRAIT(__is_aggregate); |
| 1067 | REVERTIBLE_TYPE_TRAIT(__is_arithmetic); |
| 1068 | REVERTIBLE_TYPE_TRAIT(__is_array); |
| 1069 | REVERTIBLE_TYPE_TRAIT(__is_assignable); |
| 1070 | REVERTIBLE_TYPE_TRAIT(__is_base_of); |
| 1071 | REVERTIBLE_TYPE_TRAIT(__is_class); |
| 1072 | REVERTIBLE_TYPE_TRAIT(__is_complete_type); |
| 1073 | REVERTIBLE_TYPE_TRAIT(__is_compound); |
| 1074 | REVERTIBLE_TYPE_TRAIT(__is_const); |
| 1075 | REVERTIBLE_TYPE_TRAIT(__is_constructible); |
| 1076 | REVERTIBLE_TYPE_TRAIT(__is_convertible); |
| 1077 | REVERTIBLE_TYPE_TRAIT(__is_convertible_to); |
| 1078 | REVERTIBLE_TYPE_TRAIT(__is_destructible); |
| 1079 | REVERTIBLE_TYPE_TRAIT(__is_empty); |
| 1080 | REVERTIBLE_TYPE_TRAIT(__is_enum); |
| 1081 | REVERTIBLE_TYPE_TRAIT(__is_floating_point); |
| 1082 | REVERTIBLE_TYPE_TRAIT(__is_final); |
| 1083 | REVERTIBLE_TYPE_TRAIT(__is_function); |
| 1084 | REVERTIBLE_TYPE_TRAIT(__is_fundamental); |
| 1085 | REVERTIBLE_TYPE_TRAIT(__is_integral); |
| 1086 | REVERTIBLE_TYPE_TRAIT(__is_interface_class); |
| 1087 | REVERTIBLE_TYPE_TRAIT(__is_literal); |
| 1088 | REVERTIBLE_TYPE_TRAIT(__is_lvalue_expr); |
| 1089 | REVERTIBLE_TYPE_TRAIT(__is_lvalue_reference); |
| 1090 | REVERTIBLE_TYPE_TRAIT(__is_member_function_pointer); |
| 1091 | REVERTIBLE_TYPE_TRAIT(__is_member_object_pointer); |
| 1092 | REVERTIBLE_TYPE_TRAIT(__is_member_pointer); |
| 1093 | REVERTIBLE_TYPE_TRAIT(__is_nothrow_assignable); |
| 1094 | REVERTIBLE_TYPE_TRAIT(__is_nothrow_constructible); |
| 1095 | REVERTIBLE_TYPE_TRAIT(__is_nothrow_destructible); |
| 1096 | REVERTIBLE_TYPE_TRAIT(__is_object); |
| 1097 | REVERTIBLE_TYPE_TRAIT(__is_pod); |
| 1098 | REVERTIBLE_TYPE_TRAIT(__is_pointer); |
| 1099 | REVERTIBLE_TYPE_TRAIT(__is_polymorphic); |
| 1100 | REVERTIBLE_TYPE_TRAIT(__is_reference); |
| 1101 | REVERTIBLE_TYPE_TRAIT(__is_rvalue_expr); |
| 1102 | REVERTIBLE_TYPE_TRAIT(__is_rvalue_reference); |
| 1103 | REVERTIBLE_TYPE_TRAIT(__is_same); |
| 1104 | REVERTIBLE_TYPE_TRAIT(__is_scalar); |
| 1105 | REVERTIBLE_TYPE_TRAIT(__is_sealed); |
| 1106 | REVERTIBLE_TYPE_TRAIT(__is_signed); |
| 1107 | REVERTIBLE_TYPE_TRAIT(__is_standard_layout); |
| 1108 | REVERTIBLE_TYPE_TRAIT(__is_trivial); |
| 1109 | REVERTIBLE_TYPE_TRAIT(__is_trivially_assignable); |
| 1110 | REVERTIBLE_TYPE_TRAIT(__is_trivially_constructible); |
| 1111 | REVERTIBLE_TYPE_TRAIT(__is_trivially_copyable); |
| 1112 | REVERTIBLE_TYPE_TRAIT(__is_union); |
| 1113 | REVERTIBLE_TYPE_TRAIT(__is_unsigned); |
| 1114 | REVERTIBLE_TYPE_TRAIT(__is_void); |
| 1115 | REVERTIBLE_TYPE_TRAIT(__is_volatile); |
| 1116 | #undef REVERTIBLE_TYPE_TRAIT |
| 1117 | #undef RTT_JOIN |
| 1118 | } |
| 1119 | |
| 1120 | // If we find that this is in fact the name of a type trait, |
| 1121 | // update the token kind in place and parse again to treat it as |
| 1122 | // the appropriate kind of type trait. |
| 1123 | llvm::SmallDenseMap<IdentifierInfo *, tok::TokenKind>::iterator Known |
| 1124 | = RevertibleTypeTraits.find(II); |
| 1125 | if (Known != RevertibleTypeTraits.end()) { |
| 1126 | Tok.setKind(Known->second); |
| 1127 | return ParseCastExpression(ParseKind, isAddressOfOperand, |
| 1128 | NotCastExpr, isTypeCast, |
| 1129 | isVectorLiteral, NotPrimaryExpression); |
| 1130 | } |
| 1131 | } |
| 1132 | |
| 1133 | if ((!ColonIsSacred && Next.is(tok::colon)) || |
| 1134 | Next.isOneOf(tok::coloncolon, tok::less, tok::l_paren, |
| 1135 | tok::l_brace)) { |
| 1136 | // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse. |
| 1137 | if (TryAnnotateTypeOrScopeToken()) |
| 1138 | return ExprError(); |
| 1139 | if (!Tok.is(tok::identifier)) |
| 1140 | return ParseCastExpression(ParseKind, isAddressOfOperand, |
| 1141 | NotCastExpr, isTypeCast, |
| 1142 | isVectorLiteral, |
| 1143 | NotPrimaryExpression); |
| 1144 | } |
| 1145 | } |
| 1146 | |
| 1147 | // Consume the identifier so that we can see if it is followed by a '(' or |
| 1148 | // '.'. |
| 1149 | IdentifierInfo &II = *Tok.getIdentifierInfo(); |
| 1150 | SourceLocation ILoc = ConsumeToken(); |
| 1151 | |
| 1152 | // Support 'Class.property' and 'super.property' notation. |
| 1153 | if (getLangOpts().ObjC && Tok.is(tok::period) && |
| 1154 | (Actions.getTypeName(II, ILoc, getCurScope()) || |
| 1155 | // Allow the base to be 'super' if in an objc-method. |
| 1156 | (&II == Ident_super && getCurScope()->isInObjcMethodScope()))) { |
| 1157 | ConsumeToken(); |
| 1158 | |
| 1159 | if (Tok.is(tok::code_completion) && &II != Ident_super) { |
| 1160 | cutOffParsing(); |
| 1161 | Actions.CodeCompleteObjCClassPropertyRefExpr( |
| 1162 | getCurScope(), II, ILoc, ExprStatementTokLoc == ILoc); |
| 1163 | return ExprError(); |
| 1164 | } |
| 1165 | // Allow either an identifier or the keyword 'class' (in C++). |
| 1166 | if (Tok.isNot(tok::identifier) && |
| 1167 | !(getLangOpts().CPlusPlus && Tok.is(tok::kw_class))) { |
| 1168 | Diag(Tok, diag::err_expected_property_name); |
| 1169 | return ExprError(); |
| 1170 | } |
| 1171 | IdentifierInfo &PropertyName = *Tok.getIdentifierInfo(); |
| 1172 | SourceLocation PropertyLoc = ConsumeToken(); |
| 1173 | |
| 1174 | Res = Actions.ActOnClassPropertyRefExpr(II, PropertyName, |
| 1175 | ILoc, PropertyLoc); |
| 1176 | break; |
| 1177 | } |
| 1178 | |
| 1179 | // In an Objective-C method, if we have "super" followed by an identifier, |
| 1180 | // the token sequence is ill-formed. However, if there's a ':' or ']' after |
| 1181 | // that identifier, this is probably a message send with a missing open |
| 1182 | // bracket. Treat it as such. |
| 1183 | if (getLangOpts().ObjC && &II == Ident_super && !InMessageExpression && |
| 1184 | getCurScope()->isInObjcMethodScope() && |
| 1185 | ((Tok.is(tok::identifier) && |
| 1186 | (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) || |
| 1187 | Tok.is(tok::code_completion))) { |
| 1188 | Res = ParseObjCMessageExpressionBody(SourceLocation(), ILoc, nullptr, |
| 1189 | nullptr); |
| 1190 | break; |
| 1191 | } |
| 1192 | |
| 1193 | // If we have an Objective-C class name followed by an identifier |
| 1194 | // and either ':' or ']', this is an Objective-C class message |
| 1195 | // send that's missing the opening '['. Recovery |
| 1196 | // appropriately. Also take this path if we're performing code |
| 1197 | // completion after an Objective-C class name. |
| 1198 | if (getLangOpts().ObjC && |
| 1199 | ((Tok.is(tok::identifier) && !InMessageExpression) || |
| 1200 | Tok.is(tok::code_completion))) { |
| 1201 | const Token& Next = NextToken(); |
| 1202 | if (Tok.is(tok::code_completion) || |
| 1203 | Next.is(tok::colon) || Next.is(tok::r_square)) |
| 1204 | if (ParsedType Typ = Actions.getTypeName(II, ILoc, getCurScope())) |
| 1205 | if (Typ.get()->isObjCObjectOrInterfaceType()) { |
| 1206 | // Fake up a Declarator to use with ActOnTypeName. |
| 1207 | DeclSpec DS(AttrFactory); |
| 1208 | DS.SetRangeStart(ILoc); |
| 1209 | DS.SetRangeEnd(ILoc); |
| 1210 | const char *PrevSpec = nullptr; |
| 1211 | unsigned DiagID; |
| 1212 | DS.SetTypeSpecType(TST_typename, ILoc, PrevSpec, DiagID, Typ, |
| 1213 | Actions.getASTContext().getPrintingPolicy()); |
| 1214 | |
| 1215 | Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName); |
| 1216 | TypeResult Ty = Actions.ActOnTypeName(getCurScope(), |
| 1217 | DeclaratorInfo); |
| 1218 | if (Ty.isInvalid()) |
| 1219 | break; |
| 1220 | |
| 1221 | Res = ParseObjCMessageExpressionBody(SourceLocation(), |
| 1222 | SourceLocation(), |
| 1223 | Ty.get(), nullptr); |
| 1224 | break; |
| 1225 | } |
| 1226 | } |
| 1227 | |
| 1228 | // Make sure to pass down the right value for isAddressOfOperand. |
| 1229 | if (isAddressOfOperand && isPostfixExpressionSuffixStart()) |
| 1230 | isAddressOfOperand = false; |
| 1231 | |
| 1232 | // Function designators are allowed to be undeclared (C99 6.5.1p2), so we |
| 1233 | // need to know whether or not this identifier is a function designator or |
| 1234 | // not. |
| 1235 | UnqualifiedId Name; |
| 1236 | CXXScopeSpec ScopeSpec; |
| 1237 | SourceLocation TemplateKWLoc; |
| 1238 | Token Replacement; |
| 1239 | CastExpressionIdValidator Validator( |
| 1240 | /*Next=*/Tok, |
| 1241 | /*AllowTypes=*/isTypeCast != NotTypeCast, |
| 1242 | /*AllowNonTypes=*/isTypeCast != IsTypeCast); |
| 1243 | Validator.IsAddressOfOperand = isAddressOfOperand; |
| 1244 | if (Tok.isOneOf(tok::periodstar, tok::arrowstar)) { |
| 1245 | Validator.WantExpressionKeywords = false; |
| 1246 | Validator.WantRemainingKeywords = false; |
| 1247 | } else { |
| 1248 | Validator.WantRemainingKeywords = Tok.isNot(tok::r_paren); |
| 1249 | } |
| 1250 | Name.setIdentifier(&II, ILoc); |
| 1251 | Res = Actions.ActOnIdExpression( |
| 1252 | getCurScope(), ScopeSpec, TemplateKWLoc, Name, Tok.is(tok::l_paren), |
| 1253 | isAddressOfOperand, &Validator, |
| 1254 | /*IsInlineAsmIdentifier=*/false, |
| 1255 | Tok.is(tok::r_paren) ? nullptr : &Replacement); |
| 1256 | if (!Res.isInvalid() && Res.isUnset()) { |
| 1257 | UnconsumeToken(Replacement); |
| 1258 | return ParseCastExpression(ParseKind, isAddressOfOperand, |
| 1259 | NotCastExpr, isTypeCast, |
| 1260 | /*isVectorLiteral=*/false, |
| 1261 | NotPrimaryExpression); |
| 1262 | } |
| 1263 | if (!Res.isInvalid() && Tok.is(tok::less)) |
| 1264 | checkPotentialAngleBracket(Res); |
| 1265 | break; |
| 1266 | } |
| 1267 | case tok::char_constant: // constant: character-constant |
| 1268 | case tok::wide_char_constant: |
| 1269 | case tok::utf8_char_constant: |
| 1270 | case tok::utf16_char_constant: |
| 1271 | case tok::utf32_char_constant: |
| 1272 | Res = Actions.ActOnCharacterConstant(Tok, /*UDLScope*/getCurScope()); |
| 1273 | ConsumeToken(); |
| 1274 | break; |
| 1275 | case tok::kw___func__: // primary-expression: __func__ [C99 6.4.2.2] |
| 1276 | case tok::kw___FUNCTION__: // primary-expression: __FUNCTION__ [GNU] |
| 1277 | case tok::kw___FUNCDNAME__: // primary-expression: __FUNCDNAME__ [MS] |
| 1278 | case tok::kw___FUNCSIG__: // primary-expression: __FUNCSIG__ [MS] |
| 1279 | case tok::kw_L__FUNCTION__: // primary-expression: L__FUNCTION__ [MS] |
| 1280 | case tok::kw_L__FUNCSIG__: // primary-expression: L__FUNCSIG__ [MS] |
| 1281 | case tok::kw___PRETTY_FUNCTION__: // primary-expression: __P..Y_F..N__ [GNU] |
| 1282 | Res = Actions.ActOnPredefinedExpr(Tok.getLocation(), SavedKind); |
| 1283 | ConsumeToken(); |
| 1284 | break; |
| 1285 | case tok::string_literal: // primary-expression: string-literal |
| 1286 | case tok::wide_string_literal: |
| 1287 | case tok::utf8_string_literal: |
| 1288 | case tok::utf16_string_literal: |
| 1289 | case tok::utf32_string_literal: |
| 1290 | Res = ParseStringLiteralExpression(true); |
| 1291 | break; |
| 1292 | case tok::kw__Generic: // primary-expression: generic-selection [C11 6.5.1] |
| 1293 | Res = ParseGenericSelectionExpression(); |
| 1294 | break; |
| 1295 | case tok::kw___builtin_available: |
| 1296 | Res = ParseAvailabilityCheckExpr(Tok.getLocation()); |
| 1297 | break; |
| 1298 | case tok::kw___builtin_va_arg: |
| 1299 | case tok::kw___builtin_offsetof: |
| 1300 | case tok::kw___builtin_choose_expr: |
| 1301 | case tok::kw___builtin_astype: // primary-expression: [OCL] as_type() |
| 1302 | case tok::kw___builtin_convertvector: |
| 1303 | case tok::kw___builtin_COLUMN: |
| 1304 | case tok::kw___builtin_FILE: |
| 1305 | case tok::kw___builtin_FUNCTION: |
| 1306 | case tok::kw___builtin_LINE: |
| 1307 | case tok::kw___builtin_source_location: |
| 1308 | if (NotPrimaryExpression) |
| 1309 | *NotPrimaryExpression = true; |
| 1310 | // This parses the complete suffix; we can return early. |
| 1311 | return ParseBuiltinPrimaryExpression(); |
| 1312 | case tok::kw___null: |
| 1313 | Res = Actions.ActOnGNUNullExpr(ConsumeToken()); |
| 1314 | break; |
| 1315 | |
| 1316 | case tok::plusplus: // unary-expression: '++' unary-expression [C99] |
| 1317 | case tok::minusminus: { // unary-expression: '--' unary-expression [C99] |
| 1318 | if (NotPrimaryExpression) |
| 1319 | *NotPrimaryExpression = true; |
| 1320 | // C++ [expr.unary] has: |
| 1321 | // unary-expression: |
| 1322 | // ++ cast-expression |
| 1323 | // -- cast-expression |
| 1324 | Token SavedTok = Tok; |
| 1325 | ConsumeToken(); |
| 1326 | |
| 1327 | PreferredType.enterUnary(Actions, Tok.getLocation(), SavedTok.getKind(), |
| 1328 | SavedTok.getLocation()); |
| 1329 | // One special case is implicitly handled here: if the preceding tokens are |
| 1330 | // an ambiguous cast expression, such as "(T())++", then we recurse to |
| 1331 | // determine whether the '++' is prefix or postfix. |
| 1332 | Res = ParseCastExpression(getLangOpts().CPlusPlus ? |
| 1333 | UnaryExprOnly : AnyCastExpr, |
| 1334 | /*isAddressOfOperand*/false, NotCastExpr, |
| 1335 | NotTypeCast); |
| 1336 | if (NotCastExpr) { |
| 1337 | // If we return with NotCastExpr = true, we must not consume any tokens, |
| 1338 | // so put the token back where we found it. |
| 1339 | assert(Res.isInvalid())(static_cast <bool> (Res.isInvalid()) ? void (0) : __assert_fail ("Res.isInvalid()", "clang/lib/Parse/ParseExpr.cpp", 1339, __extension__ __PRETTY_FUNCTION__)); |
| 1340 | UnconsumeToken(SavedTok); |
| 1341 | return ExprError(); |
| 1342 | } |
| 1343 | if (!Res.isInvalid()) { |
| 1344 | Expr *Arg = Res.get(); |
| 1345 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedTok.getLocation(), |
| 1346 | SavedKind, Arg); |
| 1347 | if (Res.isInvalid()) |
| 1348 | Res = Actions.CreateRecoveryExpr(SavedTok.getLocation(), |
| 1349 | Arg->getEndLoc(), Arg); |
| 1350 | } |
| 1351 | return Res; |
| 1352 | } |
| 1353 | case tok::amp: { // unary-expression: '&' cast-expression |
| 1354 | if (NotPrimaryExpression) |
| 1355 | *NotPrimaryExpression = true; |
| 1356 | // Special treatment because of member pointers |
| 1357 | SourceLocation SavedLoc = ConsumeToken(); |
| 1358 | PreferredType.enterUnary(Actions, Tok.getLocation(), tok::amp, SavedLoc); |
| 1359 | Res = ParseCastExpression(AnyCastExpr, true); |
| 1360 | if (!Res.isInvalid()) { |
| 1361 | Expr *Arg = Res.get(); |
| 1362 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Arg); |
| 1363 | if (Res.isInvalid()) |
| 1364 | Res = Actions.CreateRecoveryExpr(Tok.getLocation(), Arg->getEndLoc(), |
| 1365 | Arg); |
| 1366 | } |
| 1367 | return Res; |
| 1368 | } |
| 1369 | |
| 1370 | case tok::star: // unary-expression: '*' cast-expression |
| 1371 | case tok::plus: // unary-expression: '+' cast-expression |
| 1372 | case tok::minus: // unary-expression: '-' cast-expression |
| 1373 | case tok::tilde: // unary-expression: '~' cast-expression |
| 1374 | case tok::exclaim: // unary-expression: '!' cast-expression |
| 1375 | case tok::kw___real: // unary-expression: '__real' cast-expression [GNU] |
| 1376 | case tok::kw___imag: { // unary-expression: '__imag' cast-expression [GNU] |
| 1377 | if (NotPrimaryExpression) |
| 1378 | *NotPrimaryExpression = true; |
| 1379 | SourceLocation SavedLoc = ConsumeToken(); |
| 1380 | PreferredType.enterUnary(Actions, Tok.getLocation(), SavedKind, SavedLoc); |
| 1381 | Res = ParseCastExpression(AnyCastExpr); |
| 1382 | if (!Res.isInvalid()) { |
| 1383 | Expr *Arg = Res.get(); |
| 1384 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Arg); |
| 1385 | if (Res.isInvalid()) |
| 1386 | Res = Actions.CreateRecoveryExpr(SavedLoc, Arg->getEndLoc(), Arg); |
| 1387 | } |
| 1388 | return Res; |
| 1389 | } |
| 1390 | |
| 1391 | case tok::kw_co_await: { // unary-expression: 'co_await' cast-expression |
| 1392 | if (NotPrimaryExpression) |
| 1393 | *NotPrimaryExpression = true; |
| 1394 | SourceLocation CoawaitLoc = ConsumeToken(); |
| 1395 | Res = ParseCastExpression(AnyCastExpr); |
| 1396 | if (!Res.isInvalid()) |
| 1397 | Res = Actions.ActOnCoawaitExpr(getCurScope(), CoawaitLoc, Res.get()); |
| 1398 | return Res; |
| 1399 | } |
| 1400 | |
| 1401 | case tok::kw___extension__:{//unary-expression:'__extension__' cast-expr [GNU] |
| 1402 | // __extension__ silences extension warnings in the subexpression. |
| 1403 | if (NotPrimaryExpression) |
| 1404 | *NotPrimaryExpression = true; |
| 1405 | ExtensionRAIIObject O(Diags); // Use RAII to do this. |
| 1406 | SourceLocation SavedLoc = ConsumeToken(); |
| 1407 | Res = ParseCastExpression(AnyCastExpr); |
| 1408 | if (!Res.isInvalid()) |
| 1409 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get()); |
| 1410 | return Res; |
| 1411 | } |
| 1412 | case tok::kw__Alignof: // unary-expression: '_Alignof' '(' type-name ')' |
| 1413 | if (!getLangOpts().C11) |
| 1414 | Diag(Tok, diag::ext_c11_feature) << Tok.getName(); |
| 1415 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
| 1416 | case tok::kw_alignof: // unary-expression: 'alignof' '(' type-id ')' |
| 1417 | case tok::kw___alignof: // unary-expression: '__alignof' unary-expression |
| 1418 | // unary-expression: '__alignof' '(' type-name ')' |
| 1419 | case tok::kw_sizeof: // unary-expression: 'sizeof' unary-expression |
| 1420 | // unary-expression: 'sizeof' '(' type-name ')' |
| 1421 | case tok::kw_vec_step: // unary-expression: OpenCL 'vec_step' expression |
| 1422 | // unary-expression: '__builtin_omp_required_simd_align' '(' type-name ')' |
| 1423 | case tok::kw___builtin_omp_required_simd_align: |
| 1424 | if (NotPrimaryExpression) |
| 1425 | *NotPrimaryExpression = true; |
| 1426 | AllowSuffix = false; |
| 1427 | Res = ParseUnaryExprOrTypeTraitExpression(); |
| 1428 | break; |
| 1429 | case tok::ampamp: { // unary-expression: '&&' identifier |
| 1430 | if (NotPrimaryExpression) |
| 1431 | *NotPrimaryExpression = true; |
| 1432 | SourceLocation AmpAmpLoc = ConsumeToken(); |
| 1433 | if (Tok.isNot(tok::identifier)) |
| 1434 | return ExprError(Diag(Tok, diag::err_expected) << tok::identifier); |
| 1435 | |
| 1436 | if (getCurScope()->getFnParent() == nullptr) |
| 1437 | return ExprError(Diag(Tok, diag::err_address_of_label_outside_fn)); |
| 1438 | |
| 1439 | Diag(AmpAmpLoc, diag::ext_gnu_address_of_label); |
| 1440 | LabelDecl *LD = Actions.LookupOrCreateLabel(Tok.getIdentifierInfo(), |
| 1441 | Tok.getLocation()); |
| 1442 | Res = Actions.ActOnAddrLabel(AmpAmpLoc, Tok.getLocation(), LD); |
| 1443 | ConsumeToken(); |
| 1444 | AllowSuffix = false; |
| 1445 | break; |
| 1446 | } |
| 1447 | case tok::kw_const_cast: |
| 1448 | case tok::kw_dynamic_cast: |
| 1449 | case tok::kw_reinterpret_cast: |
| 1450 | case tok::kw_static_cast: |
| 1451 | case tok::kw_addrspace_cast: |
| 1452 | if (NotPrimaryExpression) |
| 1453 | *NotPrimaryExpression = true; |
| 1454 | Res = ParseCXXCasts(); |
| 1455 | break; |
| 1456 | case tok::kw___builtin_bit_cast: |
| 1457 | if (NotPrimaryExpression) |
| 1458 | *NotPrimaryExpression = true; |
| 1459 | Res = ParseBuiltinBitCast(); |
| 1460 | break; |
| 1461 | case tok::kw_typeid: |
| 1462 | if (NotPrimaryExpression) |
| 1463 | *NotPrimaryExpression = true; |
| 1464 | Res = ParseCXXTypeid(); |
| 1465 | break; |
| 1466 | case tok::kw___uuidof: |
| 1467 | if (NotPrimaryExpression) |
| 1468 | *NotPrimaryExpression = true; |
| 1469 | Res = ParseCXXUuidof(); |
| 1470 | break; |
| 1471 | case tok::kw_this: |
| 1472 | Res = ParseCXXThis(); |
| 1473 | break; |
| 1474 | case tok::kw___builtin_sycl_unique_stable_name: |
| 1475 | Res = ParseSYCLUniqueStableNameExpression(); |
| 1476 | break; |
| 1477 | |
| 1478 | case tok::annot_typename: |
| 1479 | if (isStartOfObjCClassMessageMissingOpenBracket()) { |
| 1480 | TypeResult Type = getTypeAnnotation(Tok); |
| 1481 | |
| 1482 | // Fake up a Declarator to use with ActOnTypeName. |
| 1483 | DeclSpec DS(AttrFactory); |
| 1484 | DS.SetRangeStart(Tok.getLocation()); |
| 1485 | DS.SetRangeEnd(Tok.getLastLoc()); |
| 1486 | |
| 1487 | const char *PrevSpec = nullptr; |
| 1488 | unsigned DiagID; |
| 1489 | DS.SetTypeSpecType(TST_typename, Tok.getAnnotationEndLoc(), |
| 1490 | PrevSpec, DiagID, Type, |
| 1491 | Actions.getASTContext().getPrintingPolicy()); |
| 1492 | |
| 1493 | Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName); |
| 1494 | TypeResult Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
| 1495 | if (Ty.isInvalid()) |
| 1496 | break; |
| 1497 | |
| 1498 | ConsumeAnnotationToken(); |
| 1499 | Res = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(), |
| 1500 | Ty.get(), nullptr); |
| 1501 | break; |
| 1502 | } |
| 1503 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
| 1504 | |
| 1505 | case tok::annot_decltype: |
| 1506 | case tok::kw_char: |
| 1507 | case tok::kw_wchar_t: |
| 1508 | case tok::kw_char8_t: |
| 1509 | case tok::kw_char16_t: |
| 1510 | case tok::kw_char32_t: |
| 1511 | case tok::kw_bool: |
| 1512 | case tok::kw_short: |
| 1513 | case tok::kw_int: |
| 1514 | case tok::kw_long: |
| 1515 | case tok::kw___int64: |
| 1516 | case tok::kw___int128: |
| 1517 | case tok::kw__ExtInt: |
| 1518 | case tok::kw__BitInt: |
| 1519 | case tok::kw_signed: |
| 1520 | case tok::kw_unsigned: |
| 1521 | case tok::kw_half: |
| 1522 | case tok::kw_float: |
| 1523 | case tok::kw_double: |
| 1524 | case tok::kw___bf16: |
| 1525 | case tok::kw__Float16: |
| 1526 | case tok::kw___float128: |
| 1527 | case tok::kw___ibm128: |
| 1528 | case tok::kw_void: |
| 1529 | case tok::kw_auto: |
| 1530 | case tok::kw_typename: |
| 1531 | case tok::kw_typeof: |
| 1532 | case tok::kw___vector: |
| 1533 | #define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t: |
| 1534 | #include "clang/Basic/OpenCLImageTypes.def" |
| 1535 | { |
| 1536 | if (!getLangOpts().CPlusPlus) { |
| 1537 | Diag(Tok, diag::err_expected_expression); |
| 1538 | return ExprError(); |
| 1539 | } |
| 1540 | |
| 1541 | // Everything henceforth is a postfix-expression. |
| 1542 | if (NotPrimaryExpression) |
| 1543 | *NotPrimaryExpression = true; |
| 1544 | |
| 1545 | if (SavedKind == tok::kw_typename) { |
| 1546 | // postfix-expression: typename-specifier '(' expression-list[opt] ')' |
| 1547 | // typename-specifier braced-init-list |
| 1548 | if (TryAnnotateTypeOrScopeToken()) |
| 1549 | return ExprError(); |
| 1550 | |
| 1551 | if (!Actions.isSimpleTypeSpecifier(Tok.getKind())) |
| 1552 | // We are trying to parse a simple-type-specifier but might not get such |
| 1553 | // a token after error recovery. |
| 1554 | return ExprError(); |
| 1555 | } |
| 1556 | |
| 1557 | // postfix-expression: simple-type-specifier '(' expression-list[opt] ')' |
| 1558 | // simple-type-specifier braced-init-list |
| 1559 | // |
| 1560 | DeclSpec DS(AttrFactory); |
| 1561 | |
| 1562 | ParseCXXSimpleTypeSpecifier(DS); |
| 1563 | if (Tok.isNot(tok::l_paren) && |
| 1564 | (!getLangOpts().CPlusPlus11 || Tok.isNot(tok::l_brace))) |
| 1565 | return ExprError(Diag(Tok, diag::err_expected_lparen_after_type) |
| 1566 | << DS.getSourceRange()); |
| 1567 | |
| 1568 | if (Tok.is(tok::l_brace)) |
| 1569 | Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists); |
| 1570 | |
| 1571 | Res = ParseCXXTypeConstructExpression(DS); |
| 1572 | break; |
| 1573 | } |
| 1574 | |
| 1575 | case tok::annot_cxxscope: { // [C++] id-expression: qualified-id |
| 1576 | // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse. |
| 1577 | // (We can end up in this situation after tentative parsing.) |
| 1578 | if (TryAnnotateTypeOrScopeToken()) |
| 1579 | return ExprError(); |
| 1580 | if (!Tok.is(tok::annot_cxxscope)) |
| 1581 | return ParseCastExpression(ParseKind, isAddressOfOperand, NotCastExpr, |
| 1582 | isTypeCast, isVectorLiteral, |
| 1583 | NotPrimaryExpression); |
| 1584 | |
| 1585 | Token Next = NextToken(); |
| 1586 | if (Next.is(tok::annot_template_id)) { |
| 1587 | TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Next); |
| 1588 | if (TemplateId->Kind == TNK_Type_template) { |
| 1589 | // We have a qualified template-id that we know refers to a |
| 1590 | // type, translate it into a type and continue parsing as a |
| 1591 | // cast expression. |
| 1592 | CXXScopeSpec SS; |
| 1593 | ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr, |
| 1594 | /*ObjectHasErrors=*/false, |
| 1595 | /*EnteringContext=*/false); |
| 1596 | AnnotateTemplateIdTokenAsType(SS); |
| 1597 | return ParseCastExpression(ParseKind, isAddressOfOperand, NotCastExpr, |
| 1598 | isTypeCast, isVectorLiteral, |
| 1599 | NotPrimaryExpression); |
| 1600 | } |
| 1601 | } |
| 1602 | |
| 1603 | // Parse as an id-expression. |
| 1604 | Res = ParseCXXIdExpression(isAddressOfOperand); |
| 1605 | break; |
| 1606 | } |
| 1607 | |
| 1608 | case tok::annot_template_id: { // [C++] template-id |
| 1609 | TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); |
| 1610 | if (TemplateId->Kind == TNK_Type_template) { |
| 1611 | // We have a template-id that we know refers to a type, |
| 1612 | // translate it into a type and continue parsing as a cast |
| 1613 | // expression. |
| 1614 | CXXScopeSpec SS; |
| 1615 | AnnotateTemplateIdTokenAsType(SS); |
| 1616 | return ParseCastExpression(ParseKind, isAddressOfOperand, |
| 1617 | NotCastExpr, isTypeCast, isVectorLiteral, |
| 1618 | NotPrimaryExpression); |
| 1619 | } |
| 1620 | |
| 1621 | // Fall through to treat the template-id as an id-expression. |
| 1622 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
| 1623 | } |
| 1624 | |
| 1625 | case tok::kw_operator: // [C++] id-expression: operator/conversion-function-id |
| 1626 | Res = ParseCXXIdExpression(isAddressOfOperand); |
| 1627 | break; |
| 1628 | |
| 1629 | case tok::coloncolon: { |
| 1630 | // ::foo::bar -> global qualified name etc. If TryAnnotateTypeOrScopeToken |
| 1631 | // annotates the token, tail recurse. |
| 1632 | if (TryAnnotateTypeOrScopeToken()) |
| 1633 | return ExprError(); |
| 1634 | if (!Tok.is(tok::coloncolon)) |
| 1635 | return ParseCastExpression(ParseKind, isAddressOfOperand, isTypeCast, |
| 1636 | isVectorLiteral, NotPrimaryExpression); |
| 1637 | |
| 1638 | // ::new -> [C++] new-expression |
| 1639 | // ::delete -> [C++] delete-expression |
| 1640 | SourceLocation CCLoc = ConsumeToken(); |
| 1641 | if (Tok.is(tok::kw_new)) { |
| 1642 | if (NotPrimaryExpression) |
| 1643 | *NotPrimaryExpression = true; |
| 1644 | Res = ParseCXXNewExpression(true, CCLoc); |
| 1645 | AllowSuffix = false; |
| 1646 | break; |
| 1647 | } |
| 1648 | if (Tok.is(tok::kw_delete)) { |
| 1649 | if (NotPrimaryExpression) |
| 1650 | *NotPrimaryExpression = true; |
| 1651 | Res = ParseCXXDeleteExpression(true, CCLoc); |
| 1652 | AllowSuffix = false; |
| 1653 | break; |
| 1654 | } |
| 1655 | |
| 1656 | // This is not a type name or scope specifier, it is an invalid expression. |
| 1657 | Diag(CCLoc, diag::err_expected_expression); |
| 1658 | return ExprError(); |
| 1659 | } |
| 1660 | |
| 1661 | case tok::kw_new: // [C++] new-expression |
| 1662 | if (NotPrimaryExpression) |
| 1663 | *NotPrimaryExpression = true; |
| 1664 | Res = ParseCXXNewExpression(false, Tok.getLocation()); |
| 1665 | AllowSuffix = false; |
| 1666 | break; |
| 1667 | |
| 1668 | case tok::kw_delete: // [C++] delete-expression |
| 1669 | if (NotPrimaryExpression) |
| 1670 | *NotPrimaryExpression = true; |
| 1671 | Res = ParseCXXDeleteExpression(false, Tok.getLocation()); |
| 1672 | AllowSuffix = false; |
| 1673 | break; |
| 1674 | |
| 1675 | case tok::kw_requires: // [C++2a] requires-expression |
| 1676 | Res = ParseRequiresExpression(); |
| 1677 | AllowSuffix = false; |
| 1678 | break; |
| 1679 | |
| 1680 | case tok::kw_noexcept: { // [C++0x] 'noexcept' '(' expression ')' |
| 1681 | if (NotPrimaryExpression) |
| 1682 | *NotPrimaryExpression = true; |
| 1683 | Diag(Tok, diag::warn_cxx98_compat_noexcept_expr); |
| 1684 | SourceLocation KeyLoc = ConsumeToken(); |
| 1685 | BalancedDelimiterTracker T(*this, tok::l_paren); |
| 1686 | |
| 1687 | if (T.expectAndConsume(diag::err_expected_lparen_after, "noexcept")) |
| 1688 | return ExprError(); |
| 1689 | // C++11 [expr.unary.noexcept]p1: |
| 1690 | // The noexcept operator determines whether the evaluation of its operand, |
| 1691 | // which is an unevaluated operand, can throw an exception. |
| 1692 | EnterExpressionEvaluationContext Unevaluated( |
| 1693 | Actions, Sema::ExpressionEvaluationContext::Unevaluated); |
| 1694 | Res = ParseExpression(); |
| 1695 | |
| 1696 | T.consumeClose(); |
| 1697 | |
| 1698 | if (!Res.isInvalid()) |
| 1699 | Res = Actions.ActOnNoexceptExpr(KeyLoc, T.getOpenLocation(), Res.get(), |
| 1700 | T.getCloseLocation()); |
| 1701 | AllowSuffix = false; |
| 1702 | break; |
| 1703 | } |
| 1704 | |
| 1705 | #define TYPE_TRAIT(N,Spelling,K) \ |
| 1706 | case tok::kw_##Spelling: |
| 1707 | #include "clang/Basic/TokenKinds.def" |
| 1708 | Res = ParseTypeTrait(); |
| 1709 | break; |
| 1710 | |
| 1711 | case tok::kw___array_rank: |
| 1712 | case tok::kw___array_extent: |
| 1713 | if (NotPrimaryExpression) |
| 1714 | *NotPrimaryExpression = true; |
| 1715 | Res = ParseArrayTypeTrait(); |
| 1716 | break; |
| 1717 | |
| 1718 | case tok::kw___is_lvalue_expr: |
| 1719 | case tok::kw___is_rvalue_expr: |
| 1720 | if (NotPrimaryExpression) |
| 1721 | *NotPrimaryExpression = true; |
| 1722 | Res = ParseExpressionTrait(); |
| 1723 | break; |
| 1724 | |
| 1725 | case tok::at: { |
| 1726 | if (NotPrimaryExpression) |
| 1727 | *NotPrimaryExpression = true; |
| 1728 | SourceLocation AtLoc = ConsumeToken(); |
| 1729 | return ParseObjCAtExpression(AtLoc); |
| 1730 | } |
| 1731 | case tok::caret: |
| 1732 | Res = ParseBlockLiteralExpression(); |
| 1733 | break; |
| 1734 | case tok::code_completion: { |
| 1735 | cutOffParsing(); |
| 1736 | Actions.CodeCompleteExpression(getCurScope(), |
| 1737 | PreferredType.get(Tok.getLocation())); |
| 1738 | return ExprError(); |
| 1739 | } |
| 1740 | case tok::l_square: |
| 1741 | if (getLangOpts().CPlusPlus11) { |
| 1742 | if (getLangOpts().ObjC) { |
| 1743 | // C++11 lambda expressions and Objective-C message sends both start with a |
| 1744 | // square bracket. There are three possibilities here: |
| 1745 | // we have a valid lambda expression, we have an invalid lambda |
| 1746 | // expression, or we have something that doesn't appear to be a lambda. |
| 1747 | // If we're in the last case, we fall back to ParseObjCMessageExpression. |
| 1748 | Res = TryParseLambdaExpression(); |
| 1749 | if (!Res.isInvalid() && !Res.get()) { |
| 1750 | // We assume Objective-C++ message expressions are not |
| 1751 | // primary-expressions. |
| 1752 | if (NotPrimaryExpression) |
| 1753 | *NotPrimaryExpression = true; |
| 1754 | Res = ParseObjCMessageExpression(); |
| 1755 | } |
| 1756 | break; |
| 1757 | } |
| 1758 | Res = ParseLambdaExpression(); |
| 1759 | break; |
| 1760 | } |
| 1761 | if (getLangOpts().ObjC) { |
| 1762 | Res = ParseObjCMessageExpression(); |
| 1763 | break; |
| 1764 | } |
| 1765 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
| 1766 | default: |
| 1767 | NotCastExpr = true; |
| 1768 | return ExprError(); |
| 1769 | } |
| 1770 | |
| 1771 | // Check to see whether Res is a function designator only. If it is and we |
| 1772 | // are compiling for OpenCL, we need to return an error as this implies |
| 1773 | // that the address of the function is being taken, which is illegal in CL. |
| 1774 | |
| 1775 | if (ParseKind == PrimaryExprOnly) |
| 1776 | // This is strictly a primary-expression - no postfix-expr pieces should be |
| 1777 | // parsed. |
| 1778 | return Res; |
| 1779 | |
| 1780 | if (!AllowSuffix) { |
| 1781 | // FIXME: Don't parse a primary-expression suffix if we encountered a parse |
| 1782 | // error already. |
| 1783 | if (Res.isInvalid()) |
| 1784 | return Res; |
| 1785 | |
| 1786 | switch (Tok.getKind()) { |
| 1787 | case tok::l_square: |
| 1788 | case tok::l_paren: |
| 1789 | case tok::plusplus: |
| 1790 | case tok::minusminus: |
| 1791 | // "expected ';'" or similar is probably the right diagnostic here. Let |
| 1792 | // the caller decide what to do. |
| 1793 | if (Tok.isAtStartOfLine()) |
| 1794 | return Res; |
| 1795 | |
| 1796 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
| 1797 | case tok::period: |
| 1798 | case tok::arrow: |
| 1799 | break; |
| 1800 | |
| 1801 | default: |
| 1802 | return Res; |
| 1803 | } |
| 1804 | |
| 1805 | // This was a unary-expression for which a postfix-expression suffix is |
| 1806 | // not permitted by the grammar (eg, a sizeof expression or |
| 1807 | // new-expression or similar). Diagnose but parse the suffix anyway. |
| 1808 | Diag(Tok.getLocation(), diag::err_postfix_after_unary_requires_parens) |
| 1809 | << Tok.getKind() << Res.get()->getSourceRange() |
| 1810 | << FixItHint::CreateInsertion(Res.get()->getBeginLoc(), "(") |
| 1811 | << FixItHint::CreateInsertion(PP.getLocForEndOfToken(PrevTokLocation), |
| 1812 | ")"); |
| 1813 | } |
| 1814 | |
| 1815 | // These can be followed by postfix-expr pieces. |
| 1816 | PreferredType = SavedType; |
| 1817 | Res = ParsePostfixExpressionSuffix(Res); |
| 1818 | if (getLangOpts().OpenCL && |
| 1819 | !getActions().getOpenCLOptions().isAvailableOption( |
| 1820 | "__cl_clang_function_pointers", getLangOpts())) |
| 1821 | if (Expr *PostfixExpr = Res.get()) { |
| 1822 | QualType Ty = PostfixExpr->getType(); |
| 1823 | if (!Ty.isNull() && Ty->isFunctionType()) { |
| 1824 | Diag(PostfixExpr->getExprLoc(), |
| 1825 | diag::err_opencl_taking_function_address_parser); |
| 1826 | return ExprError(); |
| 1827 | } |
| 1828 | } |
| 1829 | |
| 1830 | return Res; |
| 1831 | } |
| 1832 | |
| 1833 | /// Once the leading part of a postfix-expression is parsed, this |
| 1834 | /// method parses any suffixes that apply. |
| 1835 | /// |
| 1836 | /// \verbatim |
| 1837 | /// postfix-expression: [C99 6.5.2] |
| 1838 | /// primary-expression |
| 1839 | /// postfix-expression '[' expression ']' |
| 1840 | /// postfix-expression '[' braced-init-list ']' |
| 1841 | /// postfix-expression '[' expression-list [opt] ']' [C++2b 12.4.5] |
| 1842 | /// postfix-expression '(' argument-expression-list[opt] ')' |
| 1843 | /// postfix-expression '.' identifier |
| 1844 | /// postfix-expression '->' identifier |
| 1845 | /// postfix-expression '++' |
| 1846 | /// postfix-expression '--' |
| 1847 | /// '(' type-name ')' '{' initializer-list '}' |
| 1848 | /// '(' type-name ')' '{' initializer-list ',' '}' |
| 1849 | /// |
| 1850 | /// argument-expression-list: [C99 6.5.2] |
| 1851 | /// argument-expression ...[opt] |
| 1852 | /// argument-expression-list ',' assignment-expression ...[opt] |
| 1853 | /// \endverbatim |
| 1854 | ExprResult |
| 1855 | Parser::ParsePostfixExpressionSuffix(ExprResult LHS) { |
| 1856 | // Now that the primary-expression piece of the postfix-expression has been |
| 1857 | // parsed, see if there are any postfix-expression pieces here. |
| 1858 | SourceLocation Loc; |
| 1859 | auto SavedType = PreferredType; |
| 1860 | while (true) { |
| 1861 | // Each iteration relies on preferred type for the whole expression. |
| 1862 | PreferredType = SavedType; |
| 1863 | switch (Tok.getKind()) { |
| 1864 | case tok::code_completion: |
| 1865 | if (InMessageExpression) |
| 1866 | return LHS; |
| 1867 | |
| 1868 | cutOffParsing(); |
| 1869 | Actions.CodeCompletePostfixExpression( |
| 1870 | getCurScope(), LHS, PreferredType.get(Tok.getLocation())); |
| 1871 | return ExprError(); |
| 1872 | |
| 1873 | case tok::identifier: |
| 1874 | // If we see identifier: after an expression, and we're not already in a |
| 1875 | // message send, then this is probably a message send with a missing |
| 1876 | // opening bracket '['. |
| 1877 | if (getLangOpts().ObjC && !InMessageExpression && |
| 1878 | (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) { |
| 1879 | LHS = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(), |
| 1880 | nullptr, LHS.get()); |
| 1881 | break; |
| 1882 | } |
| 1883 | // Fall through; this isn't a message send. |
| 1884 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
| 1885 | |
| 1886 | default: // Not a postfix-expression suffix. |
| 1887 | return LHS; |
| 1888 | case tok::l_square: { // postfix-expression: p-e '[' expression ']' |
| 1889 | // If we have a array postfix expression that starts on a new line and |
| 1890 | // Objective-C is enabled, it is highly likely that the user forgot a |
| 1891 | // semicolon after the base expression and that the array postfix-expr is |
| 1892 | // actually another message send. In this case, do some look-ahead to see |
| 1893 | // if the contents of the square brackets are obviously not a valid |
| 1894 | // expression and recover by pretending there is no suffix. |
| 1895 | if (getLangOpts().ObjC && Tok.isAtStartOfLine() && |
| 1896 | isSimpleObjCMessageExpression()) |
| 1897 | return LHS; |
| 1898 | |
| 1899 | // Reject array indices starting with a lambda-expression. '[[' is |
| 1900 | // reserved for attributes. |
| 1901 | if (CheckProhibitedCXX11Attribute()) { |
| 1902 | (void)Actions.CorrectDelayedTyposInExpr(LHS); |
| 1903 | return ExprError(); |
| 1904 | } |
| 1905 | BalancedDelimiterTracker T(*this, tok::l_square); |
| 1906 | T.consumeOpen(); |
| 1907 | Loc = T.getOpenLocation(); |
| 1908 | ExprResult Length, Stride; |
| 1909 | SourceLocation ColonLocFirst, ColonLocSecond; |
| 1910 | ExprVector ArgExprs; |
| 1911 | bool HasError = false; |
| 1912 | PreferredType.enterSubscript(Actions, Tok.getLocation(), LHS.get()); |
| 1913 | |
| 1914 | // We try to parse a list of indexes in all language mode first |
| 1915 | // and, in we find 0 or one index, we try to parse an OpenMP array |
| 1916 | // section. This allow us to support C++2b multi dimensional subscript and |
| 1917 | // OpenMp sections in the same language mode. |
| 1918 | if (!getLangOpts().OpenMP || Tok.isNot(tok::colon)) { |
| 1919 | if (!getLangOpts().CPlusPlus2b) { |
| 1920 | ExprResult Idx; |
| 1921 | if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) { |
| 1922 | Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists); |
| 1923 | Idx = ParseBraceInitializer(); |
| 1924 | } else { |
| 1925 | Idx = ParseExpression(); // May be a comma expression |
| 1926 | } |
| 1927 | LHS = Actions.CorrectDelayedTyposInExpr(LHS); |
| 1928 | Idx = Actions.CorrectDelayedTyposInExpr(Idx); |
| 1929 | if (Idx.isInvalid()) { |
| 1930 | HasError = true; |
| 1931 | } else { |
| 1932 | ArgExprs.push_back(Idx.get()); |
| 1933 | } |
| 1934 | } else if (Tok.isNot(tok::r_square)) { |
| 1935 | CommaLocsTy CommaLocs; |
| 1936 | if (ParseExpressionList(ArgExprs, CommaLocs)) { |
| 1937 | LHS = Actions.CorrectDelayedTyposInExpr(LHS); |
| 1938 | HasError = true; |
| 1939 | } |
| 1940 | assert((static_cast <bool> ((ArgExprs.empty() || ArgExprs.size () == CommaLocs.size() + 1) && "Unexpected number of commas!" ) ? void (0) : __assert_fail ("(ArgExprs.empty() || ArgExprs.size() == CommaLocs.size() + 1) && \"Unexpected number of commas!\"" , "clang/lib/Parse/ParseExpr.cpp", 1942, __extension__ __PRETTY_FUNCTION__ )) |
| 1941 | (ArgExprs.empty() || ArgExprs.size() == CommaLocs.size() + 1) &&(static_cast <bool> ((ArgExprs.empty() || ArgExprs.size () == CommaLocs.size() + 1) && "Unexpected number of commas!" ) ? void (0) : __assert_fail ("(ArgExprs.empty() || ArgExprs.size() == CommaLocs.size() + 1) && \"Unexpected number of commas!\"" , "clang/lib/Parse/ParseExpr.cpp", 1942, __extension__ __PRETTY_FUNCTION__ )) |
| 1942 | "Unexpected number of commas!")(static_cast <bool> ((ArgExprs.empty() || ArgExprs.size () == CommaLocs.size() + 1) && "Unexpected number of commas!" ) ? void (0) : __assert_fail ("(ArgExprs.empty() || ArgExprs.size() == CommaLocs.size() + 1) && \"Unexpected number of commas!\"" , "clang/lib/Parse/ParseExpr.cpp", 1942, __extension__ __PRETTY_FUNCTION__ )); |
| 1943 | } |
| 1944 | } |
| 1945 | |
| 1946 | if (ArgExprs.size() <= 1 && getLangOpts().OpenMP) { |
| 1947 | ColonProtectionRAIIObject RAII(*this); |
| 1948 | if (Tok.is(tok::colon)) { |
| 1949 | // Consume ':' |
| 1950 | ColonLocFirst = ConsumeToken(); |
| 1951 | if (Tok.isNot(tok::r_square) && |
| 1952 | (getLangOpts().OpenMP < 50 || |
| 1953 | ((Tok.isNot(tok::colon) && getLangOpts().OpenMP >= 50)))) { |
| 1954 | Length = ParseExpression(); |
| 1955 | Length = Actions.CorrectDelayedTyposInExpr(Length); |
| 1956 | } |
| 1957 | } |
| 1958 | if (getLangOpts().OpenMP >= 50 && |
| 1959 | (OMPClauseKind == llvm::omp::Clause::OMPC_to || |
| 1960 | OMPClauseKind == llvm::omp::Clause::OMPC_from) && |
| 1961 | Tok.is(tok::colon)) { |
| 1962 | // Consume ':' |
| 1963 | ColonLocSecond = ConsumeToken(); |
| 1964 | if (Tok.isNot(tok::r_square)) { |
| 1965 | Stride = ParseExpression(); |
| 1966 | } |
| 1967 | } |
| 1968 | } |
| 1969 | |
| 1970 | SourceLocation RLoc = Tok.getLocation(); |
| 1971 | LHS = Actions.CorrectDelayedTyposInExpr(LHS); |
| 1972 | |
| 1973 | if (!LHS.isInvalid() && !HasError && !Length.isInvalid() && |
| 1974 | !Stride.isInvalid() && Tok.is(tok::r_square)) { |
| 1975 | if (ColonLocFirst.isValid() || ColonLocSecond.isValid()) { |
| 1976 | LHS = Actions.ActOnOMPArraySectionExpr( |
| 1977 | LHS.get(), Loc, ArgExprs.empty() ? nullptr : ArgExprs[0], |
| 1978 | ColonLocFirst, ColonLocSecond, Length.get(), Stride.get(), RLoc); |
| 1979 | } else { |
| 1980 | LHS = Actions.ActOnArraySubscriptExpr(getCurScope(), LHS.get(), Loc, |
| 1981 | ArgExprs, RLoc); |
| 1982 | } |
| 1983 | } else { |
| 1984 | LHS = ExprError(); |
| 1985 | } |
| 1986 | |
| 1987 | // Match the ']'. |
| 1988 | T.consumeClose(); |
| 1989 | break; |
| 1990 | } |
| 1991 | |
| 1992 | case tok::l_paren: // p-e: p-e '(' argument-expression-list[opt] ')' |
| 1993 | case tok::lesslessless: { // p-e: p-e '<<<' argument-expression-list '>>>' |
| 1994 | // '(' argument-expression-list[opt] ')' |
| 1995 | tok::TokenKind OpKind = Tok.getKind(); |
| 1996 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 1997 | |
| 1998 | Expr *ExecConfig = nullptr; |
| 1999 | |
| 2000 | BalancedDelimiterTracker PT(*this, tok::l_paren); |
| 2001 | |
| 2002 | if (OpKind == tok::lesslessless) { |
| 2003 | ExprVector ExecConfigExprs; |
| 2004 | CommaLocsTy ExecConfigCommaLocs; |
| 2005 | SourceLocation OpenLoc = ConsumeToken(); |
| 2006 | |
| 2007 | if (ParseSimpleExpressionList(ExecConfigExprs, ExecConfigCommaLocs)) { |
| 2008 | (void)Actions.CorrectDelayedTyposInExpr(LHS); |
| 2009 | LHS = ExprError(); |
| 2010 | } |
| 2011 | |
| 2012 | SourceLocation CloseLoc; |
| 2013 | if (TryConsumeToken(tok::greatergreatergreater, CloseLoc)) { |
| 2014 | } else if (LHS.isInvalid()) { |
| 2015 | SkipUntil(tok::greatergreatergreater, StopAtSemi); |
| 2016 | } else { |
| 2017 | // There was an error closing the brackets |
| 2018 | Diag(Tok, diag::err_expected) << tok::greatergreatergreater; |
| 2019 | Diag(OpenLoc, diag::note_matching) << tok::lesslessless; |
| 2020 | SkipUntil(tok::greatergreatergreater, StopAtSemi); |
| 2021 | LHS = ExprError(); |
| 2022 | } |
| 2023 | |
| 2024 | if (!LHS.isInvalid()) { |
| 2025 | if (ExpectAndConsume(tok::l_paren)) |
| 2026 | LHS = ExprError(); |
| 2027 | else |
| 2028 | Loc = PrevTokLocation; |
| 2029 | } |
| 2030 | |
| 2031 | if (!LHS.isInvalid()) { |
| 2032 | ExprResult ECResult = Actions.ActOnCUDAExecConfigExpr(getCurScope(), |
| 2033 | OpenLoc, |
| 2034 | ExecConfigExprs, |
| 2035 | CloseLoc); |
| 2036 | if (ECResult.isInvalid()) |
| 2037 | LHS = ExprError(); |
| 2038 | else |
| 2039 | ExecConfig = ECResult.get(); |
| 2040 | } |
| 2041 | } else { |
| 2042 | PT.consumeOpen(); |
| 2043 | Loc = PT.getOpenLocation(); |
| 2044 | } |
| 2045 | |
| 2046 | ExprVector ArgExprs; |
| 2047 | CommaLocsTy CommaLocs; |
| 2048 | auto RunSignatureHelp = [&]() -> QualType { |
| 2049 | QualType PreferredType = Actions.ProduceCallSignatureHelp( |
| 2050 | LHS.get(), ArgExprs, PT.getOpenLocation()); |
| 2051 | CalledSignatureHelp = true; |
| 2052 | return PreferredType; |
| 2053 | }; |
| 2054 | if (OpKind == tok::l_paren || !LHS.isInvalid()) { |
| 2055 | if (Tok.isNot(tok::r_paren)) { |
| 2056 | if (ParseExpressionList(ArgExprs, CommaLocs, [&] { |
| 2057 | PreferredType.enterFunctionArgument(Tok.getLocation(), |
| 2058 | RunSignatureHelp); |
| 2059 | })) { |
| 2060 | (void)Actions.CorrectDelayedTyposInExpr(LHS); |
| 2061 | // If we got an error when parsing expression list, we don't call |
| 2062 | // the CodeCompleteCall handler inside the parser. So call it here |
| 2063 | // to make sure we get overload suggestions even when we are in the |
| 2064 | // middle of a parameter. |
| 2065 | if (PP.isCodeCompletionReached() && !CalledSignatureHelp) |
| 2066 | RunSignatureHelp(); |
| 2067 | LHS = ExprError(); |
| 2068 | } else if (LHS.isInvalid()) { |
| 2069 | for (auto &E : ArgExprs) |
| 2070 | Actions.CorrectDelayedTyposInExpr(E); |
| 2071 | } |
| 2072 | } |
| 2073 | } |
| 2074 | |
| 2075 | // Match the ')'. |
| 2076 | if (LHS.isInvalid()) { |
| 2077 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2078 | } else if (Tok.isNot(tok::r_paren)) { |
| 2079 | bool HadDelayedTypo = false; |
| 2080 | if (Actions.CorrectDelayedTyposInExpr(LHS).get() != LHS.get()) |
| 2081 | HadDelayedTypo = true; |
| 2082 | for (auto &E : ArgExprs) |
| 2083 | if (Actions.CorrectDelayedTyposInExpr(E).get() != E) |
| 2084 | HadDelayedTypo = true; |
| 2085 | // If there were delayed typos in the LHS or ArgExprs, call SkipUntil |
| 2086 | // instead of PT.consumeClose() to avoid emitting extra diagnostics for |
| 2087 | // the unmatched l_paren. |
| 2088 | if (HadDelayedTypo) |
| 2089 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2090 | else |
| 2091 | PT.consumeClose(); |
| 2092 | LHS = ExprError(); |
| 2093 | } else { |
| 2094 | assert((static_cast <bool> ((ArgExprs.size() == 0 || ArgExprs. size() - 1 == CommaLocs.size()) && "Unexpected number of commas!" ) ? void (0) : __assert_fail ("(ArgExprs.size() == 0 || ArgExprs.size() - 1 == CommaLocs.size()) && \"Unexpected number of commas!\"" , "clang/lib/Parse/ParseExpr.cpp", 2096, __extension__ __PRETTY_FUNCTION__ )) |
| 2095 | (ArgExprs.size() == 0 || ArgExprs.size() - 1 == CommaLocs.size()) &&(static_cast <bool> ((ArgExprs.size() == 0 || ArgExprs. size() - 1 == CommaLocs.size()) && "Unexpected number of commas!" ) ? void (0) : __assert_fail ("(ArgExprs.size() == 0 || ArgExprs.size() - 1 == CommaLocs.size()) && \"Unexpected number of commas!\"" , "clang/lib/Parse/ParseExpr.cpp", 2096, __extension__ __PRETTY_FUNCTION__ )) |
| 2096 | "Unexpected number of commas!")(static_cast <bool> ((ArgExprs.size() == 0 || ArgExprs. size() - 1 == CommaLocs.size()) && "Unexpected number of commas!" ) ? void (0) : __assert_fail ("(ArgExprs.size() == 0 || ArgExprs.size() - 1 == CommaLocs.size()) && \"Unexpected number of commas!\"" , "clang/lib/Parse/ParseExpr.cpp", 2096, __extension__ __PRETTY_FUNCTION__ )); |
| 2097 | Expr *Fn = LHS.get(); |
| 2098 | SourceLocation RParLoc = Tok.getLocation(); |
| 2099 | LHS = Actions.ActOnCallExpr(getCurScope(), Fn, Loc, ArgExprs, RParLoc, |
| 2100 | ExecConfig); |
| 2101 | if (LHS.isInvalid()) { |
| 2102 | ArgExprs.insert(ArgExprs.begin(), Fn); |
| 2103 | LHS = |
| 2104 | Actions.CreateRecoveryExpr(Fn->getBeginLoc(), RParLoc, ArgExprs); |
| 2105 | } |
| 2106 | PT.consumeClose(); |
| 2107 | } |
| 2108 | |
| 2109 | break; |
| 2110 | } |
| 2111 | case tok::arrow: |
| 2112 | case tok::period: { |
| 2113 | // postfix-expression: p-e '->' template[opt] id-expression |
| 2114 | // postfix-expression: p-e '.' template[opt] id-expression |
| 2115 | tok::TokenKind OpKind = Tok.getKind(); |
| 2116 | SourceLocation OpLoc = ConsumeToken(); // Eat the "." or "->" token. |
| 2117 | |
| 2118 | CXXScopeSpec SS; |
| 2119 | ParsedType ObjectType; |
| 2120 | bool MayBePseudoDestructor = false; |
| 2121 | Expr* OrigLHS = !LHS.isInvalid() ? LHS.get() : nullptr; |
| 2122 | |
| 2123 | PreferredType.enterMemAccess(Actions, Tok.getLocation(), OrigLHS); |
| 2124 | |
| 2125 | if (getLangOpts().CPlusPlus && !LHS.isInvalid()) { |
| 2126 | Expr *Base = OrigLHS; |
| 2127 | const Type* BaseType = Base->getType().getTypePtrOrNull(); |
| 2128 | if (BaseType && Tok.is(tok::l_paren) && |
| 2129 | (BaseType->isFunctionType() || |
| 2130 | BaseType->isSpecificPlaceholderType(BuiltinType::BoundMember))) { |
| 2131 | Diag(OpLoc, diag::err_function_is_not_record) |
| 2132 | << OpKind << Base->getSourceRange() |
| 2133 | << FixItHint::CreateRemoval(OpLoc); |
| 2134 | return ParsePostfixExpressionSuffix(Base); |
| 2135 | } |
| 2136 | |
| 2137 | LHS = Actions.ActOnStartCXXMemberReference(getCurScope(), Base, OpLoc, |
| 2138 | OpKind, ObjectType, |
| 2139 | MayBePseudoDestructor); |
| 2140 | if (LHS.isInvalid()) { |
| 2141 | // Clang will try to perform expression based completion as a |
| 2142 | // fallback, which is confusing in case of member references. So we |
| 2143 | // stop here without any completions. |
| 2144 | if (Tok.is(tok::code_completion)) { |
| 2145 | cutOffParsing(); |
| 2146 | return ExprError(); |
| 2147 | } |
| 2148 | break; |
| 2149 | } |
| 2150 | ParseOptionalCXXScopeSpecifier( |
| 2151 | SS, ObjectType, LHS.get() && LHS.get()->containsErrors(), |
| 2152 | /*EnteringContext=*/false, &MayBePseudoDestructor); |
| 2153 | if (SS.isNotEmpty()) |
| 2154 | ObjectType = nullptr; |
| 2155 | } |
| 2156 | |
| 2157 | if (Tok.is(tok::code_completion)) { |
| 2158 | tok::TokenKind CorrectedOpKind = |
| 2159 | OpKind == tok::arrow ? tok::period : tok::arrow; |
| 2160 | ExprResult CorrectedLHS(/*Invalid=*/true); |
| 2161 | if (getLangOpts().CPlusPlus && OrigLHS) { |
| 2162 | // FIXME: Creating a TentativeAnalysisScope from outside Sema is a |
| 2163 | // hack. |
| 2164 | Sema::TentativeAnalysisScope Trap(Actions); |
| 2165 | CorrectedLHS = Actions.ActOnStartCXXMemberReference( |
| 2166 | getCurScope(), OrigLHS, OpLoc, CorrectedOpKind, ObjectType, |
| 2167 | MayBePseudoDestructor); |
| 2168 | } |
| 2169 | |
| 2170 | Expr *Base = LHS.get(); |
| 2171 | Expr *CorrectedBase = CorrectedLHS.get(); |
| 2172 | if (!CorrectedBase && !getLangOpts().CPlusPlus) |
| 2173 | CorrectedBase = Base; |
| 2174 | |
| 2175 | // Code completion for a member access expression. |
| 2176 | cutOffParsing(); |
| 2177 | Actions.CodeCompleteMemberReferenceExpr( |
| 2178 | getCurScope(), Base, CorrectedBase, OpLoc, OpKind == tok::arrow, |
| 2179 | Base && ExprStatementTokLoc == Base->getBeginLoc(), |
| 2180 | PreferredType.get(Tok.getLocation())); |
| 2181 | |
| 2182 | return ExprError(); |
| 2183 | } |
| 2184 | |
| 2185 | if (MayBePseudoDestructor && !LHS.isInvalid()) { |
| 2186 | LHS = ParseCXXPseudoDestructor(LHS.get(), OpLoc, OpKind, SS, |
| 2187 | ObjectType); |
| 2188 | break; |
| 2189 | } |
| 2190 | |
| 2191 | // Either the action has told us that this cannot be a |
| 2192 | // pseudo-destructor expression (based on the type of base |
| 2193 | // expression), or we didn't see a '~' in the right place. We |
| 2194 | // can still parse a destructor name here, but in that case it |
| 2195 | // names a real destructor. |
| 2196 | // Allow explicit constructor calls in Microsoft mode. |
| 2197 | // FIXME: Add support for explicit call of template constructor. |
| 2198 | SourceLocation TemplateKWLoc; |
| 2199 | UnqualifiedId Name; |
| 2200 | if (getLangOpts().ObjC && OpKind == tok::period && |
| 2201 | Tok.is(tok::kw_class)) { |
| 2202 | // Objective-C++: |
| 2203 | // After a '.' in a member access expression, treat the keyword |
| 2204 | // 'class' as if it were an identifier. |
| 2205 | // |
| 2206 | // This hack allows property access to the 'class' method because it is |
| 2207 | // such a common method name. For other C++ keywords that are |
| 2208 | // Objective-C method names, one must use the message send syntax. |
| 2209 | IdentifierInfo *Id = Tok.getIdentifierInfo(); |
| 2210 | SourceLocation Loc = ConsumeToken(); |
| 2211 | Name.setIdentifier(Id, Loc); |
| 2212 | } else if (ParseUnqualifiedId( |
| 2213 | SS, ObjectType, LHS.get() && LHS.get()->containsErrors(), |
| 2214 | /*EnteringContext=*/false, |
| 2215 | /*AllowDestructorName=*/true, |
| 2216 | /*AllowConstructorName=*/ |
| 2217 | getLangOpts().MicrosoftExt && SS.isNotEmpty(), |
| 2218 | /*AllowDeductionGuide=*/false, &TemplateKWLoc, Name)) { |
| 2219 | (void)Actions.CorrectDelayedTyposInExpr(LHS); |
| 2220 | LHS = ExprError(); |
| 2221 | } |
| 2222 | |
| 2223 | if (!LHS.isInvalid()) |
| 2224 | LHS = Actions.ActOnMemberAccessExpr(getCurScope(), LHS.get(), OpLoc, |
| 2225 | OpKind, SS, TemplateKWLoc, Name, |
| 2226 | CurParsedObjCImpl ? CurParsedObjCImpl->Dcl |
| 2227 | : nullptr); |
| 2228 | if (!LHS.isInvalid()) { |
| 2229 | if (Tok.is(tok::less)) |
| 2230 | checkPotentialAngleBracket(LHS); |
| 2231 | } else if (OrigLHS && Name.isValid()) { |
| 2232 | // Preserve the LHS if the RHS is an invalid member. |
| 2233 | LHS = Actions.CreateRecoveryExpr(OrigLHS->getBeginLoc(), |
| 2234 | Name.getEndLoc(), {OrigLHS}); |
| 2235 | } |
| 2236 | break; |
| 2237 | } |
| 2238 | case tok::plusplus: // postfix-expression: postfix-expression '++' |
| 2239 | case tok::minusminus: // postfix-expression: postfix-expression '--' |
| 2240 | if (!LHS.isInvalid()) { |
| 2241 | Expr *Arg = LHS.get(); |
| 2242 | LHS = Actions.ActOnPostfixUnaryOp(getCurScope(), Tok.getLocation(), |
| 2243 | Tok.getKind(), Arg); |
| 2244 | if (LHS.isInvalid()) |
| 2245 | LHS = Actions.CreateRecoveryExpr(Arg->getBeginLoc(), |
| 2246 | Tok.getLocation(), Arg); |
| 2247 | } |
| 2248 | ConsumeToken(); |
| 2249 | break; |
| 2250 | } |
| 2251 | } |
| 2252 | } |
| 2253 | |
| 2254 | /// ParseExprAfterUnaryExprOrTypeTrait - We parsed a typeof/sizeof/alignof/ |
| 2255 | /// vec_step and we are at the start of an expression or a parenthesized |
| 2256 | /// type-id. OpTok is the operand token (typeof/sizeof/alignof). Returns the |
| 2257 | /// expression (isCastExpr == false) or the type (isCastExpr == true). |
| 2258 | /// |
| 2259 | /// \verbatim |
| 2260 | /// unary-expression: [C99 6.5.3] |
| 2261 | /// 'sizeof' unary-expression |
| 2262 | /// 'sizeof' '(' type-name ')' |
| 2263 | /// [GNU] '__alignof' unary-expression |
| 2264 | /// [GNU] '__alignof' '(' type-name ')' |
| 2265 | /// [C11] '_Alignof' '(' type-name ')' |
| 2266 | /// [C++0x] 'alignof' '(' type-id ')' |
| 2267 | /// |
| 2268 | /// [GNU] typeof-specifier: |
| 2269 | /// typeof ( expressions ) |
| 2270 | /// typeof ( type-name ) |
| 2271 | /// [GNU/C++] typeof unary-expression |
| 2272 | /// |
| 2273 | /// [OpenCL 1.1 6.11.12] vec_step built-in function: |
| 2274 | /// vec_step ( expressions ) |
| 2275 | /// vec_step ( type-name ) |
| 2276 | /// \endverbatim |
| 2277 | ExprResult |
| 2278 | Parser::ParseExprAfterUnaryExprOrTypeTrait(const Token &OpTok, |
| 2279 | bool &isCastExpr, |
| 2280 | ParsedType &CastTy, |
| 2281 | SourceRange &CastRange) { |
| 2282 | |
| 2283 | assert(OpTok.isOneOf(tok::kw_typeof, tok::kw_sizeof, tok::kw___alignof,(static_cast <bool> (OpTok.isOneOf(tok::kw_typeof, tok:: kw_sizeof, tok::kw___alignof, tok::kw_alignof, tok::kw__Alignof , tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align ) && "Not a typeof/sizeof/alignof/vec_step expression!" ) ? void (0) : __assert_fail ("OpTok.isOneOf(tok::kw_typeof, tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align) && \"Not a typeof/sizeof/alignof/vec_step expression!\"" , "clang/lib/Parse/ParseExpr.cpp", 2286, __extension__ __PRETTY_FUNCTION__ )) |
| 2284 | tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step,(static_cast <bool> (OpTok.isOneOf(tok::kw_typeof, tok:: kw_sizeof, tok::kw___alignof, tok::kw_alignof, tok::kw__Alignof , tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align ) && "Not a typeof/sizeof/alignof/vec_step expression!" ) ? void (0) : __assert_fail ("OpTok.isOneOf(tok::kw_typeof, tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align) && \"Not a typeof/sizeof/alignof/vec_step expression!\"" , "clang/lib/Parse/ParseExpr.cpp", 2286, __extension__ __PRETTY_FUNCTION__ )) |
| 2285 | tok::kw___builtin_omp_required_simd_align) &&(static_cast <bool> (OpTok.isOneOf(tok::kw_typeof, tok:: kw_sizeof, tok::kw___alignof, tok::kw_alignof, tok::kw__Alignof , tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align ) && "Not a typeof/sizeof/alignof/vec_step expression!" ) ? void (0) : __assert_fail ("OpTok.isOneOf(tok::kw_typeof, tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align) && \"Not a typeof/sizeof/alignof/vec_step expression!\"" , "clang/lib/Parse/ParseExpr.cpp", 2286, __extension__ __PRETTY_FUNCTION__ )) |
| 2286 | "Not a typeof/sizeof/alignof/vec_step expression!")(static_cast <bool> (OpTok.isOneOf(tok::kw_typeof, tok:: kw_sizeof, tok::kw___alignof, tok::kw_alignof, tok::kw__Alignof , tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align ) && "Not a typeof/sizeof/alignof/vec_step expression!" ) ? void (0) : __assert_fail ("OpTok.isOneOf(tok::kw_typeof, tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align) && \"Not a typeof/sizeof/alignof/vec_step expression!\"" , "clang/lib/Parse/ParseExpr.cpp", 2286, __extension__ __PRETTY_FUNCTION__ )); |
| 2287 | |
| 2288 | ExprResult Operand; |
| 2289 | |
| 2290 | // If the operand doesn't start with an '(', it must be an expression. |
| 2291 | if (Tok.isNot(tok::l_paren)) { |
| 2292 | // If construct allows a form without parenthesis, user may forget to put |
| 2293 | // pathenthesis around type name. |
| 2294 | if (OpTok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof, |
| 2295 | tok::kw__Alignof)) { |
| 2296 | if (isTypeIdUnambiguously()) { |
| 2297 | DeclSpec DS(AttrFactory); |
| 2298 | ParseSpecifierQualifierList(DS); |
| 2299 | Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName); |
| 2300 | ParseDeclarator(DeclaratorInfo); |
| 2301 | |
| 2302 | SourceLocation LParenLoc = PP.getLocForEndOfToken(OpTok.getLocation()); |
| 2303 | SourceLocation RParenLoc = PP.getLocForEndOfToken(PrevTokLocation); |
| 2304 | if (LParenLoc.isInvalid() || RParenLoc.isInvalid()) { |
| 2305 | Diag(OpTok.getLocation(), |
| 2306 | diag::err_expected_parentheses_around_typename) |
| 2307 | << OpTok.getName(); |
| 2308 | } else { |
| 2309 | Diag(LParenLoc, diag::err_expected_parentheses_around_typename) |
| 2310 | << OpTok.getName() << FixItHint::CreateInsertion(LParenLoc, "(") |
| 2311 | << FixItHint::CreateInsertion(RParenLoc, ")"); |
| 2312 | } |
| 2313 | isCastExpr = true; |
| 2314 | return ExprEmpty(); |
| 2315 | } |
| 2316 | } |
| 2317 | |
| 2318 | isCastExpr = false; |
| 2319 | if (OpTok.is(tok::kw_typeof) && !getLangOpts().CPlusPlus) { |
| 2320 | Diag(Tok, diag::err_expected_after) << OpTok.getIdentifierInfo() |
| 2321 | << tok::l_paren; |
| 2322 | return ExprError(); |
| 2323 | } |
| 2324 | |
| 2325 | Operand = ParseCastExpression(UnaryExprOnly); |
| 2326 | } else { |
| 2327 | // If it starts with a '(', we know that it is either a parenthesized |
| 2328 | // type-name, or it is a unary-expression that starts with a compound |
| 2329 | // literal, or starts with a primary-expression that is a parenthesized |
| 2330 | // expression. |
| 2331 | ParenParseOption ExprType = CastExpr; |
| 2332 | SourceLocation LParenLoc = Tok.getLocation(), RParenLoc; |
| 2333 | |
| 2334 | Operand = ParseParenExpression(ExprType, true/*stopIfCastExpr*/, |
| 2335 | false, CastTy, RParenLoc); |
| 2336 | CastRange = SourceRange(LParenLoc, RParenLoc); |
| 2337 | |
| 2338 | // If ParseParenExpression parsed a '(typename)' sequence only, then this is |
| 2339 | // a type. |
| 2340 | if (ExprType == CastExpr) { |
| 2341 | isCastExpr = true; |
| 2342 | return ExprEmpty(); |
| 2343 | } |
| 2344 | |
| 2345 | if (getLangOpts().CPlusPlus || OpTok.isNot(tok::kw_typeof)) { |
| 2346 | // GNU typeof in C requires the expression to be parenthesized. Not so for |
| 2347 | // sizeof/alignof or in C++. Therefore, the parenthesized expression is |
| 2348 | // the start of a unary-expression, but doesn't include any postfix |
| 2349 | // pieces. Parse these now if present. |
| 2350 | if (!Operand.isInvalid()) |
| 2351 | Operand = ParsePostfixExpressionSuffix(Operand.get()); |
| 2352 | } |
| 2353 | } |
| 2354 | |
| 2355 | // If we get here, the operand to the typeof/sizeof/alignof was an expression. |
| 2356 | isCastExpr = false; |
| 2357 | return Operand; |
| 2358 | } |
| 2359 | |
| 2360 | /// Parse a __builtin_sycl_unique_stable_name expression. Accepts a type-id as |
| 2361 | /// a parameter. |
| 2362 | ExprResult Parser::ParseSYCLUniqueStableNameExpression() { |
| 2363 | assert(Tok.is(tok::kw___builtin_sycl_unique_stable_name) &&(static_cast <bool> (Tok.is(tok::kw___builtin_sycl_unique_stable_name ) && "Not __builtin_sycl_unique_stable_name") ? void ( 0) : __assert_fail ("Tok.is(tok::kw___builtin_sycl_unique_stable_name) && \"Not __builtin_sycl_unique_stable_name\"" , "clang/lib/Parse/ParseExpr.cpp", 2364, __extension__ __PRETTY_FUNCTION__ )) |
| 2364 | "Not __builtin_sycl_unique_stable_name")(static_cast <bool> (Tok.is(tok::kw___builtin_sycl_unique_stable_name ) && "Not __builtin_sycl_unique_stable_name") ? void ( 0) : __assert_fail ("Tok.is(tok::kw___builtin_sycl_unique_stable_name) && \"Not __builtin_sycl_unique_stable_name\"" , "clang/lib/Parse/ParseExpr.cpp", 2364, __extension__ __PRETTY_FUNCTION__ )); |
| 2365 | |
| 2366 | SourceLocation OpLoc = ConsumeToken(); |
| 2367 | BalancedDelimiterTracker T(*this, tok::l_paren); |
| 2368 | |
| 2369 | // __builtin_sycl_unique_stable_name expressions are always parenthesized. |
| 2370 | if (T.expectAndConsume(diag::err_expected_lparen_after, |
| 2371 | "__builtin_sycl_unique_stable_name")) |
| 2372 | return ExprError(); |
| 2373 | |
| 2374 | TypeResult Ty = ParseTypeName(); |
| 2375 | |
| 2376 | if (Ty.isInvalid()) { |
| 2377 | T.skipToEnd(); |
| 2378 | return ExprError(); |
| 2379 | } |
| 2380 | |
| 2381 | if (T.consumeClose()) |
| 2382 | return ExprError(); |
| 2383 | |
| 2384 | return Actions.ActOnSYCLUniqueStableNameExpr(OpLoc, T.getOpenLocation(), |
| 2385 | T.getCloseLocation(), Ty.get()); |
| 2386 | } |
| 2387 | |
| 2388 | /// Parse a sizeof or alignof expression. |
| 2389 | /// |
| 2390 | /// \verbatim |
| 2391 | /// unary-expression: [C99 6.5.3] |
| 2392 | /// 'sizeof' unary-expression |
| 2393 | /// 'sizeof' '(' type-name ')' |
| 2394 | /// [C++11] 'sizeof' '...' '(' identifier ')' |
| 2395 | /// [GNU] '__alignof' unary-expression |
| 2396 | /// [GNU] '__alignof' '(' type-name ')' |
| 2397 | /// [C11] '_Alignof' '(' type-name ')' |
| 2398 | /// [C++11] 'alignof' '(' type-id ')' |
| 2399 | /// \endverbatim |
| 2400 | ExprResult Parser::ParseUnaryExprOrTypeTraitExpression() { |
| 2401 | assert(Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof,(static_cast <bool> (Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof , tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align ) && "Not a sizeof/alignof/vec_step expression!") ? void (0) : __assert_fail ("Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align) && \"Not a sizeof/alignof/vec_step expression!\"" , "clang/lib/Parse/ParseExpr.cpp", 2404, __extension__ __PRETTY_FUNCTION__ )) |
| 2402 | tok::kw__Alignof, tok::kw_vec_step,(static_cast <bool> (Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof , tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align ) && "Not a sizeof/alignof/vec_step expression!") ? void (0) : __assert_fail ("Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align) && \"Not a sizeof/alignof/vec_step expression!\"" , "clang/lib/Parse/ParseExpr.cpp", 2404, __extension__ __PRETTY_FUNCTION__ )) |
| 2403 | tok::kw___builtin_omp_required_simd_align) &&(static_cast <bool> (Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof , tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align ) && "Not a sizeof/alignof/vec_step expression!") ? void (0) : __assert_fail ("Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align) && \"Not a sizeof/alignof/vec_step expression!\"" , "clang/lib/Parse/ParseExpr.cpp", 2404, __extension__ __PRETTY_FUNCTION__ )) |
| 2404 | "Not a sizeof/alignof/vec_step expression!")(static_cast <bool> (Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof , tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align ) && "Not a sizeof/alignof/vec_step expression!") ? void (0) : __assert_fail ("Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step, tok::kw___builtin_omp_required_simd_align) && \"Not a sizeof/alignof/vec_step expression!\"" , "clang/lib/Parse/ParseExpr.cpp", 2404, __extension__ __PRETTY_FUNCTION__ )); |
| 2405 | Token OpTok = Tok; |
| 2406 | ConsumeToken(); |
| 2407 | |
| 2408 | // [C++11] 'sizeof' '...' '(' identifier ')' |
| 2409 | if (Tok.is(tok::ellipsis) && OpTok.is(tok::kw_sizeof)) { |
| 2410 | SourceLocation EllipsisLoc = ConsumeToken(); |
| 2411 | SourceLocation LParenLoc, RParenLoc; |
| 2412 | IdentifierInfo *Name = nullptr; |
| 2413 | SourceLocation NameLoc; |
| 2414 | if (Tok.is(tok::l_paren)) { |
| 2415 | BalancedDelimiterTracker T(*this, tok::l_paren); |
| 2416 | T.consumeOpen(); |
| 2417 | LParenLoc = T.getOpenLocation(); |
| 2418 | if (Tok.is(tok::identifier)) { |
| 2419 | Name = Tok.getIdentifierInfo(); |
| 2420 | NameLoc = ConsumeToken(); |
| 2421 | T.consumeClose(); |
| 2422 | RParenLoc = T.getCloseLocation(); |
| 2423 | if (RParenLoc.isInvalid()) |
| 2424 | RParenLoc = PP.getLocForEndOfToken(NameLoc); |
| 2425 | } else { |
| 2426 | Diag(Tok, diag::err_expected_parameter_pack); |
| 2427 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2428 | } |
| 2429 | } else if (Tok.is(tok::identifier)) { |
| 2430 | Name = Tok.getIdentifierInfo(); |
| 2431 | NameLoc = ConsumeToken(); |
| 2432 | LParenLoc = PP.getLocForEndOfToken(EllipsisLoc); |
| 2433 | RParenLoc = PP.getLocForEndOfToken(NameLoc); |
| 2434 | Diag(LParenLoc, diag::err_paren_sizeof_parameter_pack) |
| 2435 | << Name |
| 2436 | << FixItHint::CreateInsertion(LParenLoc, "(") |
| 2437 | << FixItHint::CreateInsertion(RParenLoc, ")"); |
| 2438 | } else { |
| 2439 | Diag(Tok, diag::err_sizeof_parameter_pack); |
| 2440 | } |
| 2441 | |
| 2442 | if (!Name) |
| 2443 | return ExprError(); |
| 2444 | |
| 2445 | EnterExpressionEvaluationContext Unevaluated( |
| 2446 | Actions, Sema::ExpressionEvaluationContext::Unevaluated, |
| 2447 | Sema::ReuseLambdaContextDecl); |
| 2448 | |
| 2449 | return Actions.ActOnSizeofParameterPackExpr(getCurScope(), |
| 2450 | OpTok.getLocation(), |
| 2451 | *Name, NameLoc, |
| 2452 | RParenLoc); |
| 2453 | } |
| 2454 | |
| 2455 | if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof)) |
| 2456 | Diag(OpTok, diag::warn_cxx98_compat_alignof); |
| 2457 | |
| 2458 | EnterExpressionEvaluationContext Unevaluated( |
| 2459 | Actions, Sema::ExpressionEvaluationContext::Unevaluated, |
| 2460 | Sema::ReuseLambdaContextDecl); |
| 2461 | |
| 2462 | bool isCastExpr; |
| 2463 | ParsedType CastTy; |
| 2464 | SourceRange CastRange; |
| 2465 | ExprResult Operand = ParseExprAfterUnaryExprOrTypeTrait(OpTok, |
| 2466 | isCastExpr, |
| 2467 | CastTy, |
| 2468 | CastRange); |
| 2469 | |
| 2470 | UnaryExprOrTypeTrait ExprKind = UETT_SizeOf; |
| 2471 | if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof)) |
| 2472 | ExprKind = UETT_AlignOf; |
| 2473 | else if (OpTok.is(tok::kw___alignof)) |
| 2474 | ExprKind = UETT_PreferredAlignOf; |
| 2475 | else if (OpTok.is(tok::kw_vec_step)) |
| 2476 | ExprKind = UETT_VecStep; |
| 2477 | else if (OpTok.is(tok::kw___builtin_omp_required_simd_align)) |
| 2478 | ExprKind = UETT_OpenMPRequiredSimdAlign; |
| 2479 | |
| 2480 | if (isCastExpr) |
| 2481 | return Actions.ActOnUnaryExprOrTypeTraitExpr(OpTok.getLocation(), |
| 2482 | ExprKind, |
| 2483 | /*IsType=*/true, |
| 2484 | CastTy.getAsOpaquePtr(), |
| 2485 | CastRange); |
| 2486 | |
| 2487 | if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof)) |
| 2488 | Diag(OpTok, diag::ext_alignof_expr) << OpTok.getIdentifierInfo(); |
| 2489 | |
| 2490 | // If we get here, the operand to the sizeof/alignof was an expression. |
| 2491 | if (!Operand.isInvalid()) |
| 2492 | Operand = Actions.ActOnUnaryExprOrTypeTraitExpr(OpTok.getLocation(), |
| 2493 | ExprKind, |
| 2494 | /*IsType=*/false, |
| 2495 | Operand.get(), |
| 2496 | CastRange); |
| 2497 | return Operand; |
| 2498 | } |
| 2499 | |
| 2500 | /// ParseBuiltinPrimaryExpression |
| 2501 | /// |
| 2502 | /// \verbatim |
| 2503 | /// primary-expression: [C99 6.5.1] |
| 2504 | /// [GNU] '__builtin_va_arg' '(' assignment-expression ',' type-name ')' |
| 2505 | /// [GNU] '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')' |
| 2506 | /// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ',' |
| 2507 | /// assign-expr ')' |
| 2508 | /// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')' |
| 2509 | /// [GNU] '__builtin_FILE' '(' ')' |
| 2510 | /// [GNU] '__builtin_FUNCTION' '(' ')' |
| 2511 | /// [GNU] '__builtin_LINE' '(' ')' |
| 2512 | /// [CLANG] '__builtin_COLUMN' '(' ')' |
| 2513 | /// [GNU] '__builtin_source_location' '(' ')' |
| 2514 | /// [OCL] '__builtin_astype' '(' assignment-expression ',' type-name ')' |
| 2515 | /// |
| 2516 | /// [GNU] offsetof-member-designator: |
| 2517 | /// [GNU] identifier |
| 2518 | /// [GNU] offsetof-member-designator '.' identifier |
| 2519 | /// [GNU] offsetof-member-designator '[' expression ']' |
| 2520 | /// \endverbatim |
| 2521 | ExprResult Parser::ParseBuiltinPrimaryExpression() { |
| 2522 | ExprResult Res; |
| 2523 | const IdentifierInfo *BuiltinII = Tok.getIdentifierInfo(); |
| 2524 | |
| 2525 | tok::TokenKind T = Tok.getKind(); |
| 2526 | SourceLocation StartLoc = ConsumeToken(); // Eat the builtin identifier. |
| 2527 | |
| 2528 | // All of these start with an open paren. |
| 2529 | if (Tok.isNot(tok::l_paren)) |
| 2530 | return ExprError(Diag(Tok, diag::err_expected_after) << BuiltinII |
| 2531 | << tok::l_paren); |
| 2532 | |
| 2533 | BalancedDelimiterTracker PT(*this, tok::l_paren); |
| 2534 | PT.consumeOpen(); |
| 2535 | |
| 2536 | // TODO: Build AST. |
| 2537 | |
| 2538 | switch (T) { |
| 2539 | default: llvm_unreachable("Not a builtin primary expression!")::llvm::llvm_unreachable_internal("Not a builtin primary expression!" , "clang/lib/Parse/ParseExpr.cpp", 2539); |
| 2540 | case tok::kw___builtin_va_arg: { |
| 2541 | ExprResult Expr(ParseAssignmentExpression()); |
| 2542 | |
| 2543 | if (ExpectAndConsume(tok::comma)) { |
| 2544 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2545 | Expr = ExprError(); |
| 2546 | } |
| 2547 | |
| 2548 | TypeResult Ty = ParseTypeName(); |
| 2549 | |
| 2550 | if (Tok.isNot(tok::r_paren)) { |
| 2551 | Diag(Tok, diag::err_expected) << tok::r_paren; |
| 2552 | Expr = ExprError(); |
| 2553 | } |
| 2554 | |
| 2555 | if (Expr.isInvalid() || Ty.isInvalid()) |
| 2556 | Res = ExprError(); |
| 2557 | else |
| 2558 | Res = Actions.ActOnVAArg(StartLoc, Expr.get(), Ty.get(), ConsumeParen()); |
| 2559 | break; |
| 2560 | } |
| 2561 | case tok::kw___builtin_offsetof: { |
| 2562 | SourceLocation TypeLoc = Tok.getLocation(); |
| 2563 | TypeResult Ty = ParseTypeName(); |
| 2564 | if (Ty.isInvalid()) { |
| 2565 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2566 | return ExprError(); |
| 2567 | } |
| 2568 | |
| 2569 | if (ExpectAndConsume(tok::comma)) { |
| 2570 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2571 | return ExprError(); |
| 2572 | } |
| 2573 | |
| 2574 | // We must have at least one identifier here. |
| 2575 | if (Tok.isNot(tok::identifier)) { |
| 2576 | Diag(Tok, diag::err_expected) << tok::identifier; |
| 2577 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2578 | return ExprError(); |
| 2579 | } |
| 2580 | |
| 2581 | // Keep track of the various subcomponents we see. |
| 2582 | SmallVector<Sema::OffsetOfComponent, 4> Comps; |
| 2583 | |
| 2584 | Comps.push_back(Sema::OffsetOfComponent()); |
| 2585 | Comps.back().isBrackets = false; |
| 2586 | Comps.back().U.IdentInfo = Tok.getIdentifierInfo(); |
| 2587 | Comps.back().LocStart = Comps.back().LocEnd = ConsumeToken(); |
| 2588 | |
| 2589 | // FIXME: This loop leaks the index expressions on error. |
| 2590 | while (true) { |
| 2591 | if (Tok.is(tok::period)) { |
| 2592 | // offsetof-member-designator: offsetof-member-designator '.' identifier |
| 2593 | Comps.push_back(Sema::OffsetOfComponent()); |
| 2594 | Comps.back().isBrackets = false; |
| 2595 | Comps.back().LocStart = ConsumeToken(); |
| 2596 | |
| 2597 | if (Tok.isNot(tok::identifier)) { |
| 2598 | Diag(Tok, diag::err_expected) << tok::identifier; |
| 2599 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2600 | return ExprError(); |
| 2601 | } |
| 2602 | Comps.back().U.IdentInfo = Tok.getIdentifierInfo(); |
| 2603 | Comps.back().LocEnd = ConsumeToken(); |
| 2604 | |
| 2605 | } else if (Tok.is(tok::l_square)) { |
| 2606 | if (CheckProhibitedCXX11Attribute()) |
| 2607 | return ExprError(); |
| 2608 | |
| 2609 | // offsetof-member-designator: offsetof-member-design '[' expression ']' |
| 2610 | Comps.push_back(Sema::OffsetOfComponent()); |
| 2611 | Comps.back().isBrackets = true; |
| 2612 | BalancedDelimiterTracker ST(*this, tok::l_square); |
| 2613 | ST.consumeOpen(); |
| 2614 | Comps.back().LocStart = ST.getOpenLocation(); |
| 2615 | Res = ParseExpression(); |
| 2616 | if (Res.isInvalid()) { |
| 2617 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2618 | return Res; |
| 2619 | } |
| 2620 | Comps.back().U.E = Res.get(); |
| 2621 | |
| 2622 | ST.consumeClose(); |
| 2623 | Comps.back().LocEnd = ST.getCloseLocation(); |
| 2624 | } else { |
| 2625 | if (Tok.isNot(tok::r_paren)) { |
| 2626 | PT.consumeClose(); |
| 2627 | Res = ExprError(); |
| 2628 | } else if (Ty.isInvalid()) { |
| 2629 | Res = ExprError(); |
| 2630 | } else { |
| 2631 | PT.consumeClose(); |
| 2632 | Res = Actions.ActOnBuiltinOffsetOf(getCurScope(), StartLoc, TypeLoc, |
| 2633 | Ty.get(), Comps, |
| 2634 | PT.getCloseLocation()); |
| 2635 | } |
| 2636 | break; |
| 2637 | } |
| 2638 | } |
| 2639 | break; |
| 2640 | } |
| 2641 | case tok::kw___builtin_choose_expr: { |
| 2642 | ExprResult Cond(ParseAssignmentExpression()); |
| 2643 | if (Cond.isInvalid()) { |
| 2644 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2645 | return Cond; |
| 2646 | } |
| 2647 | if (ExpectAndConsume(tok::comma)) { |
| 2648 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2649 | return ExprError(); |
| 2650 | } |
| 2651 | |
| 2652 | ExprResult Expr1(ParseAssignmentExpression()); |
| 2653 | if (Expr1.isInvalid()) { |
| 2654 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2655 | return Expr1; |
| 2656 | } |
| 2657 | if (ExpectAndConsume(tok::comma)) { |
| 2658 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2659 | return ExprError(); |
| 2660 | } |
| 2661 | |
| 2662 | ExprResult Expr2(ParseAssignmentExpression()); |
| 2663 | if (Expr2.isInvalid()) { |
| 2664 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2665 | return Expr2; |
| 2666 | } |
| 2667 | if (Tok.isNot(tok::r_paren)) { |
| 2668 | Diag(Tok, diag::err_expected) << tok::r_paren; |
| 2669 | return ExprError(); |
| 2670 | } |
| 2671 | Res = Actions.ActOnChooseExpr(StartLoc, Cond.get(), Expr1.get(), |
| 2672 | Expr2.get(), ConsumeParen()); |
| 2673 | break; |
| 2674 | } |
| 2675 | case tok::kw___builtin_astype: { |
| 2676 | // The first argument is an expression to be converted, followed by a comma. |
| 2677 | ExprResult Expr(ParseAssignmentExpression()); |
| 2678 | if (Expr.isInvalid()) { |
| 2679 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2680 | return ExprError(); |
| 2681 | } |
| 2682 | |
| 2683 | if (ExpectAndConsume(tok::comma)) { |
| 2684 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2685 | return ExprError(); |
| 2686 | } |
| 2687 | |
| 2688 | // Second argument is the type to bitcast to. |
| 2689 | TypeResult DestTy = ParseTypeName(); |
| 2690 | if (DestTy.isInvalid()) |
| 2691 | return ExprError(); |
| 2692 | |
| 2693 | // Attempt to consume the r-paren. |
| 2694 | if (Tok.isNot(tok::r_paren)) { |
| 2695 | Diag(Tok, diag::err_expected) << tok::r_paren; |
| 2696 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2697 | return ExprError(); |
| 2698 | } |
| 2699 | |
| 2700 | Res = Actions.ActOnAsTypeExpr(Expr.get(), DestTy.get(), StartLoc, |
| 2701 | ConsumeParen()); |
| 2702 | break; |
| 2703 | } |
| 2704 | case tok::kw___builtin_convertvector: { |
| 2705 | // The first argument is an expression to be converted, followed by a comma. |
| 2706 | ExprResult Expr(ParseAssignmentExpression()); |
| 2707 | if (Expr.isInvalid()) { |
| 2708 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2709 | return ExprError(); |
| 2710 | } |
| 2711 | |
| 2712 | if (ExpectAndConsume(tok::comma)) { |
| 2713 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2714 | return ExprError(); |
| 2715 | } |
| 2716 | |
| 2717 | // Second argument is the type to bitcast to. |
| 2718 | TypeResult DestTy = ParseTypeName(); |
| 2719 | if (DestTy.isInvalid()) |
| 2720 | return ExprError(); |
| 2721 | |
| 2722 | // Attempt to consume the r-paren. |
| 2723 | if (Tok.isNot(tok::r_paren)) { |
| 2724 | Diag(Tok, diag::err_expected) << tok::r_paren; |
| 2725 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2726 | return ExprError(); |
| 2727 | } |
| 2728 | |
| 2729 | Res = Actions.ActOnConvertVectorExpr(Expr.get(), DestTy.get(), StartLoc, |
| 2730 | ConsumeParen()); |
| 2731 | break; |
| 2732 | } |
| 2733 | case tok::kw___builtin_COLUMN: |
| 2734 | case tok::kw___builtin_FILE: |
| 2735 | case tok::kw___builtin_FUNCTION: |
| 2736 | case tok::kw___builtin_LINE: |
| 2737 | case tok::kw___builtin_source_location: { |
| 2738 | // Attempt to consume the r-paren. |
| 2739 | if (Tok.isNot(tok::r_paren)) { |
| 2740 | Diag(Tok, diag::err_expected) << tok::r_paren; |
| 2741 | SkipUntil(tok::r_paren, StopAtSemi); |
| 2742 | return ExprError(); |
| 2743 | } |
| 2744 | SourceLocExpr::IdentKind Kind = [&] { |
| 2745 | switch (T) { |
| 2746 | case tok::kw___builtin_FILE: |
| 2747 | return SourceLocExpr::File; |
| 2748 | case tok::kw___builtin_FUNCTION: |
| 2749 | return SourceLocExpr::Function; |
| 2750 | case tok::kw___builtin_LINE: |
| 2751 | return SourceLocExpr::Line; |
| 2752 | case tok::kw___builtin_COLUMN: |
| 2753 | return SourceLocExpr::Column; |
| 2754 | case tok::kw___builtin_source_location: |
| 2755 | return SourceLocExpr::SourceLocStruct; |
| 2756 | default: |
| 2757 | llvm_unreachable("invalid keyword")::llvm::llvm_unreachable_internal("invalid keyword", "clang/lib/Parse/ParseExpr.cpp" , 2757); |
| 2758 | } |
| 2759 | }(); |
| 2760 | Res = Actions.ActOnSourceLocExpr(Kind, StartLoc, ConsumeParen()); |
| 2761 | break; |
| 2762 | } |
| 2763 | } |
| 2764 | |
| 2765 | if (Res.isInvalid()) |
| 2766 | return ExprError(); |
| 2767 | |
| 2768 | // These can be followed by postfix-expr pieces because they are |
| 2769 | // primary-expressions. |
| 2770 | return ParsePostfixExpressionSuffix(Res.get()); |
| 2771 | } |
| 2772 | |
| 2773 | bool Parser::tryParseOpenMPArrayShapingCastPart() { |
| 2774 | assert(Tok.is(tok::l_square) && "Expected open bracket")(static_cast <bool> (Tok.is(tok::l_square) && "Expected open bracket" ) ? void (0) : __assert_fail ("Tok.is(tok::l_square) && \"Expected open bracket\"" , "clang/lib/Parse/ParseExpr.cpp", 2774, __extension__ __PRETTY_FUNCTION__ )); |
| 2775 | bool ErrorFound = true; |
| 2776 | TentativeParsingAction TPA(*this); |
| 2777 | do { |
| 2778 | if (Tok.isNot(tok::l_square)) |
| 2779 | break; |
| 2780 | // Consume '[' |
| 2781 | ConsumeBracket(); |
| 2782 | // Skip inner expression. |
| 2783 | while (!SkipUntil(tok::r_square, tok::annot_pragma_openmp_end, |
| 2784 | StopAtSemi | StopBeforeMatch)) |
| 2785 | ; |
| 2786 | if (Tok.isNot(tok::r_square)) |
| 2787 | break; |
| 2788 | // Consume ']' |
| 2789 | ConsumeBracket(); |
| 2790 | // Found ')' - done. |
| 2791 | if (Tok.is(tok::r_paren)) { |
| 2792 | ErrorFound = false; |
| 2793 | break; |
| 2794 | } |
| 2795 | } while (Tok.isNot(tok::annot_pragma_openmp_end)); |
| 2796 | TPA.Revert(); |
| 2797 | return !ErrorFound; |
| 2798 | } |
| 2799 | |
| 2800 | /// ParseParenExpression - This parses the unit that starts with a '(' token, |
| 2801 | /// based on what is allowed by ExprType. The actual thing parsed is returned |
| 2802 | /// in ExprType. If stopIfCastExpr is true, it will only return the parsed type, |
| 2803 | /// not the parsed cast-expression. |
| 2804 | /// |
| 2805 | /// \verbatim |
| 2806 | /// primary-expression: [C99 6.5.1] |
| 2807 | /// '(' expression ')' |
| 2808 | /// [GNU] '(' compound-statement ')' (if !ParenExprOnly) |
| 2809 | /// postfix-expression: [C99 6.5.2] |
| 2810 | /// '(' type-name ')' '{' initializer-list '}' |
| 2811 | /// '(' type-name ')' '{' initializer-list ',' '}' |
| 2812 | /// cast-expression: [C99 6.5.4] |
| 2813 | /// '(' type-name ')' cast-expression |
| 2814 | /// [ARC] bridged-cast-expression |
| 2815 | /// [ARC] bridged-cast-expression: |
| 2816 | /// (__bridge type-name) cast-expression |
| 2817 | /// (__bridge_transfer type-name) cast-expression |
| 2818 | /// (__bridge_retained type-name) cast-expression |
| 2819 | /// fold-expression: [C++1z] |
| 2820 | /// '(' cast-expression fold-operator '...' ')' |
| 2821 | /// '(' '...' fold-operator cast-expression ')' |
| 2822 | /// '(' cast-expression fold-operator '...' |
| 2823 | /// fold-operator cast-expression ')' |
| 2824 | /// [OPENMP] Array shaping operation |
| 2825 | /// '(' '[' expression ']' { '[' expression ']' } cast-expression |
| 2826 | /// \endverbatim |
| 2827 | ExprResult |
| 2828 | Parser::ParseParenExpression(ParenParseOption &ExprType, bool stopIfCastExpr, |
| 2829 | bool isTypeCast, ParsedType &CastTy, |
| 2830 | SourceLocation &RParenLoc) { |
| 2831 | assert(Tok.is(tok::l_paren) && "Not a paren expr!")(static_cast <bool> (Tok.is(tok::l_paren) && "Not a paren expr!" ) ? void (0) : __assert_fail ("Tok.is(tok::l_paren) && \"Not a paren expr!\"" , "clang/lib/Parse/ParseExpr.cpp", 2831, __extension__ __PRETTY_FUNCTION__ )); |
| 2832 | ColonProtectionRAIIObject ColonProtection(*this, false); |
| 2833 | BalancedDelimiterTracker T(*this, tok::l_paren); |
| 2834 | if (T.consumeOpen()) |
| 2835 | return ExprError(); |
| 2836 | SourceLocation OpenLoc = T.getOpenLocation(); |
| 2837 | |
| 2838 | PreferredType.enterParenExpr(Tok.getLocation(), OpenLoc); |
| 2839 | |
| 2840 | ExprResult Result(true); |
| 2841 | bool isAmbiguousTypeId; |
| 2842 | CastTy = nullptr; |
| 2843 | |
| 2844 | if (Tok.is(tok::code_completion)) { |
| 2845 | cutOffParsing(); |
| 2846 | Actions.CodeCompleteExpression( |
| 2847 | getCurScope(), PreferredType.get(Tok.getLocation()), |
| 2848 | /*IsParenthesized=*/ExprType >= CompoundLiteral); |
| 2849 | return ExprError(); |
| 2850 | } |
| 2851 | |
| 2852 | // Diagnose use of bridge casts in non-arc mode. |
| 2853 | bool BridgeCast = (getLangOpts().ObjC && |
| 2854 | Tok.isOneOf(tok::kw___bridge, |
| 2855 | tok::kw___bridge_transfer, |
| 2856 | tok::kw___bridge_retained, |
| 2857 | tok::kw___bridge_retain)); |
| 2858 | if (BridgeCast && !getLangOpts().ObjCAutoRefCount) { |
| 2859 | if (!TryConsumeToken(tok::kw___bridge)) { |
| 2860 | StringRef BridgeCastName = Tok.getName(); |
| 2861 | SourceLocation BridgeKeywordLoc = ConsumeToken(); |
| 2862 | if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc)) |
| 2863 | Diag(BridgeKeywordLoc, diag::warn_arc_bridge_cast_nonarc) |
| 2864 | << BridgeCastName |
| 2865 | << FixItHint::CreateReplacement(BridgeKeywordLoc, ""); |
| 2866 | } |
| 2867 | BridgeCast = false; |
| 2868 | } |
| 2869 | |
| 2870 | // None of these cases should fall through with an invalid Result |
| 2871 | // unless they've already reported an error. |
| 2872 | if (ExprType >= CompoundStmt && Tok.is(tok::l_brace)) { |
| 2873 | Diag(Tok, diag::ext_gnu_statement_expr); |
| 2874 | |
| 2875 | checkCompoundToken(OpenLoc, tok::l_paren, CompoundToken::StmtExprBegin); |
| 2876 | |
| 2877 | if (!getCurScope()->getFnParent() && !getCurScope()->getBlockParent()) { |
| 2878 | Result = ExprError(Diag(OpenLoc, diag::err_stmtexpr_file_scope)); |
| 2879 | } else { |
| 2880 | // Find the nearest non-record decl context. Variables declared in a |
| 2881 | // statement expression behave as if they were declared in the enclosing |
| 2882 | // function, block, or other code construct. |
| 2883 | DeclContext *CodeDC = Actions.CurContext; |
| 2884 | while (CodeDC->isRecord() || isa<EnumDecl>(CodeDC)) { |
| 2885 | CodeDC = CodeDC->getParent(); |
| 2886 | assert(CodeDC && !CodeDC->isFileContext() &&(static_cast <bool> (CodeDC && !CodeDC->isFileContext () && "statement expr not in code context") ? void (0 ) : __assert_fail ("CodeDC && !CodeDC->isFileContext() && \"statement expr not in code context\"" , "clang/lib/Parse/ParseExpr.cpp", 2887, __extension__ __PRETTY_FUNCTION__ )) |
| 2887 | "statement expr not in code context")(static_cast <bool> (CodeDC && !CodeDC->isFileContext () && "statement expr not in code context") ? void (0 ) : __assert_fail ("CodeDC && !CodeDC->isFileContext() && \"statement expr not in code context\"" , "clang/lib/Parse/ParseExpr.cpp", 2887, __extension__ __PRETTY_FUNCTION__ )); |
| 2888 | } |
| 2889 | Sema::ContextRAII SavedContext(Actions, CodeDC, /*NewThisContext=*/false); |
| 2890 | |
| 2891 | Actions.ActOnStartStmtExpr(); |
| 2892 | |
| 2893 | StmtResult Stmt(ParseCompoundStatement(true)); |
| 2894 | ExprType = CompoundStmt; |
| 2895 | |
| 2896 | // If the substmt parsed correctly, build the AST node. |
| 2897 | if (!Stmt.isInvalid()) { |
| 2898 | Result = Actions.ActOnStmtExpr(getCurScope(), OpenLoc, Stmt.get(), |
| 2899 | Tok.getLocation()); |
| 2900 | } else { |
| 2901 | Actions.ActOnStmtExprError(); |
| 2902 | } |
| 2903 | } |
| 2904 | } else if (ExprType >= CompoundLiteral && BridgeCast) { |
| 2905 | tok::TokenKind tokenKind = Tok.getKind(); |
| 2906 | SourceLocation BridgeKeywordLoc = ConsumeToken(); |
| 2907 | |
| 2908 | // Parse an Objective-C ARC ownership cast expression. |
| 2909 | ObjCBridgeCastKind Kind; |
| 2910 | if (tokenKind == tok::kw___bridge) |
| 2911 | Kind = OBC_Bridge; |
| 2912 | else if (tokenKind == tok::kw___bridge_transfer) |
| 2913 | Kind = OBC_BridgeTransfer; |
| 2914 | else if (tokenKind == tok::kw___bridge_retained) |
| 2915 | Kind = OBC_BridgeRetained; |
| 2916 | else { |
| 2917 | // As a hopefully temporary workaround, allow __bridge_retain as |
| 2918 | // a synonym for __bridge_retained, but only in system headers. |
| 2919 | assert(tokenKind == tok::kw___bridge_retain)(static_cast <bool> (tokenKind == tok::kw___bridge_retain ) ? void (0) : __assert_fail ("tokenKind == tok::kw___bridge_retain" , "clang/lib/Parse/ParseExpr.cpp", 2919, __extension__ __PRETTY_FUNCTION__ )); |
| 2920 | Kind = OBC_BridgeRetained; |
| 2921 | if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc)) |
| 2922 | Diag(BridgeKeywordLoc, diag::err_arc_bridge_retain) |
| 2923 | << FixItHint::CreateReplacement(BridgeKeywordLoc, |
| 2924 | "__bridge_retained"); |
| 2925 | } |
| 2926 | |
| 2927 | TypeResult Ty = ParseTypeName(); |
| 2928 | T.consumeClose(); |
| 2929 | ColonProtection.restore(); |
| 2930 | RParenLoc = T.getCloseLocation(); |
| 2931 | |
| 2932 | PreferredType.enterTypeCast(Tok.getLocation(), Ty.get().get()); |
| 2933 | ExprResult SubExpr = ParseCastExpression(AnyCastExpr); |
| 2934 | |
| 2935 | if (Ty.isInvalid() || SubExpr.isInvalid()) |
| 2936 | return ExprError(); |
| 2937 | |
| 2938 | return Actions.ActOnObjCBridgedCast(getCurScope(), OpenLoc, Kind, |
| 2939 | BridgeKeywordLoc, Ty.get(), |
| 2940 | RParenLoc, SubExpr.get()); |
| 2941 | } else if (ExprType >= CompoundLiteral && |
| 2942 | isTypeIdInParens(isAmbiguousTypeId)) { |
| 2943 | |
| 2944 | // Otherwise, this is a compound literal expression or cast expression. |
| 2945 | |
| 2946 | // In C++, if the type-id is ambiguous we disambiguate based on context. |
| 2947 | // If stopIfCastExpr is true the context is a typeof/sizeof/alignof |
| 2948 | // in which case we should treat it as type-id. |
| 2949 | // if stopIfCastExpr is false, we need to determine the context past the |
| 2950 | // parens, so we defer to ParseCXXAmbiguousParenExpression for that. |
| 2951 | if (isAmbiguousTypeId && !stopIfCastExpr) { |
| 2952 | ExprResult res = ParseCXXAmbiguousParenExpression(ExprType, CastTy, T, |
| 2953 | ColonProtection); |
| 2954 | RParenLoc = T.getCloseLocation(); |
| 2955 | return res; |
| 2956 | } |
| 2957 | |
| 2958 | // Parse the type declarator. |
| 2959 | DeclSpec DS(AttrFactory); |
| 2960 | ParseSpecifierQualifierList(DS); |
| 2961 | Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName); |
| 2962 | ParseDeclarator(DeclaratorInfo); |
| 2963 | |
| 2964 | // If our type is followed by an identifier and either ':' or ']', then |
| 2965 | // this is probably an Objective-C message send where the leading '[' is |
| 2966 | // missing. Recover as if that were the case. |
| 2967 | if (!DeclaratorInfo.isInvalidType() && Tok.is(tok::identifier) && |
| 2968 | !InMessageExpression && getLangOpts().ObjC && |
| 2969 | (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) { |
| 2970 | TypeResult Ty; |
| 2971 | { |
| 2972 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 2973 | Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
| 2974 | } |
| 2975 | Result = ParseObjCMessageExpressionBody(SourceLocation(), |
| 2976 | SourceLocation(), |
| 2977 | Ty.get(), nullptr); |
| 2978 | } else { |
| 2979 | // Match the ')'. |
| 2980 | T.consumeClose(); |
| 2981 | ColonProtection.restore(); |
| 2982 | RParenLoc = T.getCloseLocation(); |
| 2983 | if (Tok.is(tok::l_brace)) { |
| 2984 | ExprType = CompoundLiteral; |
| 2985 | TypeResult Ty; |
| 2986 | { |
| 2987 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 2988 | Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
| 2989 | } |
| 2990 | return ParseCompoundLiteralExpression(Ty.get(), OpenLoc, RParenLoc); |
| 2991 | } |
| 2992 | |
| 2993 | if (Tok.is(tok::l_paren)) { |
| 2994 | // This could be OpenCL vector Literals |
| 2995 | if (getLangOpts().OpenCL) |
| 2996 | { |
| 2997 | TypeResult Ty; |
| 2998 | { |
| 2999 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 3000 | Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
| 3001 | } |
| 3002 | if(Ty.isInvalid()) |
| 3003 | { |
| 3004 | return ExprError(); |
| 3005 | } |
| 3006 | QualType QT = Ty.get().get().getCanonicalType(); |
| 3007 | if (QT->isVectorType()) |
| 3008 | { |
| 3009 | // We parsed '(' vector-type-name ')' followed by '(' |
| 3010 | |
| 3011 | // Parse the cast-expression that follows it next. |
| 3012 | // isVectorLiteral = true will make sure we don't parse any |
| 3013 | // Postfix expression yet |
| 3014 | Result = ParseCastExpression(/*isUnaryExpression=*/AnyCastExpr, |
| 3015 | /*isAddressOfOperand=*/false, |
| 3016 | /*isTypeCast=*/IsTypeCast, |
| 3017 | /*isVectorLiteral=*/true); |
| 3018 | |
| 3019 | if (!Result.isInvalid()) { |
| 3020 | Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc, |
| 3021 | DeclaratorInfo, CastTy, |
| 3022 | RParenLoc, Result.get()); |
| 3023 | } |
| 3024 | |
| 3025 | // After we performed the cast we can check for postfix-expr pieces. |
| 3026 | if (!Result.isInvalid()) { |
| 3027 | Result = ParsePostfixExpressionSuffix(Result); |
| 3028 | } |
| 3029 | |
| 3030 | return Result; |
| 3031 | } |
| 3032 | } |
| 3033 | } |
| 3034 | |
| 3035 | if (ExprType == CastExpr) { |
| 3036 | // We parsed '(' type-name ')' and the thing after it wasn't a '{'. |
| 3037 | |
| 3038 | if (DeclaratorInfo.isInvalidType()) |
| 3039 | return ExprError(); |
| 3040 | |
| 3041 | // Note that this doesn't parse the subsequent cast-expression, it just |
| 3042 | // returns the parsed type to the callee. |
| 3043 | if (stopIfCastExpr) { |
| 3044 | TypeResult Ty; |
| 3045 | { |
| 3046 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 3047 | Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
| 3048 | } |
| 3049 | CastTy = Ty.get(); |
| 3050 | return ExprResult(); |
| 3051 | } |
| 3052 | |
| 3053 | // Reject the cast of super idiom in ObjC. |
| 3054 | if (Tok.is(tok::identifier) && getLangOpts().ObjC && |
| 3055 | Tok.getIdentifierInfo() == Ident_super && |
| 3056 | getCurScope()->isInObjcMethodScope() && |
| 3057 | GetLookAheadToken(1).isNot(tok::period)) { |
| 3058 | Diag(Tok.getLocation(), diag::err_illegal_super_cast) |
| 3059 | << SourceRange(OpenLoc, RParenLoc); |
| 3060 | return ExprError(); |
| 3061 | } |
| 3062 | |
| 3063 | PreferredType.enterTypeCast(Tok.getLocation(), CastTy.get()); |
| 3064 | // Parse the cast-expression that follows it next. |
| 3065 | // TODO: For cast expression with CastTy. |
| 3066 | Result = ParseCastExpression(/*isUnaryExpression=*/AnyCastExpr, |
| 3067 | /*isAddressOfOperand=*/false, |
| 3068 | /*isTypeCast=*/IsTypeCast); |
| 3069 | if (!Result.isInvalid()) { |
| 3070 | Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc, |
| 3071 | DeclaratorInfo, CastTy, |
| 3072 | RParenLoc, Result.get()); |
| 3073 | } |
| 3074 | return Result; |
| 3075 | } |
| 3076 | |
| 3077 | Diag(Tok, diag::err_expected_lbrace_in_compound_literal); |
| 3078 | return ExprError(); |
| 3079 | } |
| 3080 | } else if (ExprType >= FoldExpr && Tok.is(tok::ellipsis) && |
| 3081 | isFoldOperator(NextToken().getKind())) { |
| 3082 | ExprType = FoldExpr; |
| 3083 | return ParseFoldExpression(ExprResult(), T); |
| 3084 | } else if (isTypeCast) { |
| 3085 | // Parse the expression-list. |
| 3086 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 3087 | |
| 3088 | ExprVector ArgExprs; |
| 3089 | CommaLocsTy CommaLocs; |
| 3090 | |
| 3091 | if (!ParseSimpleExpressionList(ArgExprs, CommaLocs)) { |
| 3092 | // FIXME: If we ever support comma expressions as operands to |
| 3093 | // fold-expressions, we'll need to allow multiple ArgExprs here. |
| 3094 | if (ExprType >= FoldExpr && ArgExprs.size() == 1 && |
| 3095 | isFoldOperator(Tok.getKind()) && NextToken().is(tok::ellipsis)) { |
| 3096 | ExprType = FoldExpr; |
| 3097 | return ParseFoldExpression(ArgExprs[0], T); |
| 3098 | } |
| 3099 | |
| 3100 | ExprType = SimpleExpr; |
| 3101 | Result = Actions.ActOnParenListExpr(OpenLoc, Tok.getLocation(), |
| 3102 | ArgExprs); |
| 3103 | } |
| 3104 | } else if (getLangOpts().OpenMP >= 50 && OpenMPDirectiveParsing && |
| 3105 | ExprType == CastExpr && Tok.is(tok::l_square) && |
| 3106 | tryParseOpenMPArrayShapingCastPart()) { |
| 3107 | bool ErrorFound = false; |
| 3108 | SmallVector<Expr *, 4> OMPDimensions; |
| 3109 | SmallVector<SourceRange, 4> OMPBracketsRanges; |
| 3110 | do { |
| 3111 | BalancedDelimiterTracker TS(*this, tok::l_square); |
| 3112 | TS.consumeOpen(); |
| 3113 | ExprResult NumElements = |
| 3114 | Actions.CorrectDelayedTyposInExpr(ParseExpression()); |
| 3115 | if (!NumElements.isUsable()) { |
| 3116 | ErrorFound = true; |
| 3117 | while (!SkipUntil(tok::r_square, tok::r_paren, |
| 3118 | StopAtSemi | StopBeforeMatch)) |
| 3119 | ; |
| 3120 | } |
| 3121 | TS.consumeClose(); |
| 3122 | OMPDimensions.push_back(NumElements.get()); |
| 3123 | OMPBracketsRanges.push_back(TS.getRange()); |
| 3124 | } while (Tok.isNot(tok::r_paren)); |
| 3125 | // Match the ')'. |
| 3126 | T.consumeClose(); |
| 3127 | RParenLoc = T.getCloseLocation(); |
| 3128 | Result = Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression()); |
| 3129 | if (ErrorFound) { |
| 3130 | Result = ExprError(); |
| 3131 | } else if (!Result.isInvalid()) { |
| 3132 | Result = Actions.ActOnOMPArrayShapingExpr( |
| 3133 | Result.get(), OpenLoc, RParenLoc, OMPDimensions, OMPBracketsRanges); |
| 3134 | } |
| 3135 | return Result; |
| 3136 | } else { |
| 3137 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 3138 | |
| 3139 | Result = ParseExpression(MaybeTypeCast); |
| 3140 | if (!getLangOpts().CPlusPlus && MaybeTypeCast && Result.isUsable()) { |
| 3141 | // Correct typos in non-C++ code earlier so that implicit-cast-like |
| 3142 | // expressions are parsed correctly. |
| 3143 | Result = Actions.CorrectDelayedTyposInExpr(Result); |
| 3144 | } |
| 3145 | |
| 3146 | if (ExprType >= FoldExpr && isFoldOperator(Tok.getKind()) && |
| 3147 | NextToken().is(tok::ellipsis)) { |
| 3148 | ExprType = FoldExpr; |
| 3149 | return ParseFoldExpression(Result, T); |
| 3150 | } |
| 3151 | ExprType = SimpleExpr; |
| 3152 | |
| 3153 | // Don't build a paren expression unless we actually match a ')'. |
| 3154 | if (!Result.isInvalid() && Tok.is(tok::r_paren)) |
| 3155 | Result = |
| 3156 | Actions.ActOnParenExpr(OpenLoc, Tok.getLocation(), Result.get()); |
| 3157 | } |
| 3158 | |
| 3159 | // Match the ')'. |
| 3160 | if (Result.isInvalid()) { |
| 3161 | SkipUntil(tok::r_paren, StopAtSemi); |
| 3162 | return ExprError(); |
| 3163 | } |
| 3164 | |
| 3165 | T.consumeClose(); |
| 3166 | RParenLoc = T.getCloseLocation(); |
| 3167 | return Result; |
| 3168 | } |
| 3169 | |
| 3170 | /// ParseCompoundLiteralExpression - We have parsed the parenthesized type-name |
| 3171 | /// and we are at the left brace. |
| 3172 | /// |
| 3173 | /// \verbatim |
| 3174 | /// postfix-expression: [C99 6.5.2] |
| 3175 | /// '(' type-name ')' '{' initializer-list '}' |
| 3176 | /// '(' type-name ')' '{' initializer-list ',' '}' |
| 3177 | /// \endverbatim |
| 3178 | ExprResult |
| 3179 | Parser::ParseCompoundLiteralExpression(ParsedType Ty, |
| 3180 | SourceLocation LParenLoc, |
| 3181 | SourceLocation RParenLoc) { |
| 3182 | assert(Tok.is(tok::l_brace) && "Not a compound literal!")(static_cast <bool> (Tok.is(tok::l_brace) && "Not a compound literal!" ) ? void (0) : __assert_fail ("Tok.is(tok::l_brace) && \"Not a compound literal!\"" , "clang/lib/Parse/ParseExpr.cpp", 3182, __extension__ __PRETTY_FUNCTION__ )); |
| 3183 | if (!getLangOpts().C99) // Compound literals don't exist in C90. |
| 3184 | Diag(LParenLoc, diag::ext_c99_compound_literal); |
| 3185 | PreferredType.enterTypeCast(Tok.getLocation(), Ty.get()); |
| 3186 | ExprResult Result = ParseInitializer(); |
| 3187 | if (!Result.isInvalid() && Ty) |
| 3188 | return Actions.ActOnCompoundLiteral(LParenLoc, Ty, RParenLoc, Result.get()); |
| 3189 | return Result; |
| 3190 | } |
| 3191 | |
| 3192 | /// ParseStringLiteralExpression - This handles the various token types that |
| 3193 | /// form string literals, and also handles string concatenation [C99 5.1.1.2, |
| 3194 | /// translation phase #6]. |
| 3195 | /// |
| 3196 | /// \verbatim |
| 3197 | /// primary-expression: [C99 6.5.1] |
| 3198 | /// string-literal |
| 3199 | /// \verbatim |
| 3200 | ExprResult Parser::ParseStringLiteralExpression(bool AllowUserDefinedLiteral) { |
| 3201 | assert(isTokenStringLiteral() && "Not a string literal!")(static_cast <bool> (isTokenStringLiteral() && "Not a string literal!" ) ? void (0) : __assert_fail ("isTokenStringLiteral() && \"Not a string literal!\"" , "clang/lib/Parse/ParseExpr.cpp", 3201, __extension__ __PRETTY_FUNCTION__ )); |
| 3202 | |
| 3203 | // String concat. Note that keywords like __func__ and __FUNCTION__ are not |
| 3204 | // considered to be strings for concatenation purposes. |
| 3205 | SmallVector<Token, 4> StringToks; |
| 3206 | |
| 3207 | do { |
| 3208 | StringToks.push_back(Tok); |
| 3209 | ConsumeStringToken(); |
| 3210 | } while (isTokenStringLiteral()); |
| 3211 | |
| 3212 | // Pass the set of string tokens, ready for concatenation, to the actions. |
| 3213 | return Actions.ActOnStringLiteral(StringToks, |
| 3214 | AllowUserDefinedLiteral ? getCurScope() |
| 3215 | : nullptr); |
| 3216 | } |
| 3217 | |
| 3218 | /// ParseGenericSelectionExpression - Parse a C11 generic-selection |
| 3219 | /// [C11 6.5.1.1]. |
| 3220 | /// |
| 3221 | /// \verbatim |
| 3222 | /// generic-selection: |
| 3223 | /// _Generic ( assignment-expression , generic-assoc-list ) |
| 3224 | /// generic-assoc-list: |
| 3225 | /// generic-association |
| 3226 | /// generic-assoc-list , generic-association |
| 3227 | /// generic-association: |
| 3228 | /// type-name : assignment-expression |
| 3229 | /// default : assignment-expression |
| 3230 | /// \endverbatim |
| 3231 | ExprResult Parser::ParseGenericSelectionExpression() { |
| 3232 | assert(Tok.is(tok::kw__Generic) && "_Generic keyword expected")(static_cast <bool> (Tok.is(tok::kw__Generic) && "_Generic keyword expected") ? void (0) : __assert_fail ("Tok.is(tok::kw__Generic) && \"_Generic keyword expected\"" , "clang/lib/Parse/ParseExpr.cpp", 3232, __extension__ __PRETTY_FUNCTION__ )); |
| 3233 | if (!getLangOpts().C11) |
| 3234 | Diag(Tok, diag::ext_c11_feature) << Tok.getName(); |
| 3235 | |
| 3236 | SourceLocation KeyLoc = ConsumeToken(); |
| 3237 | BalancedDelimiterTracker T(*this, tok::l_paren); |
| 3238 | if (T.expectAndConsume()) |
| 3239 | return ExprError(); |
| 3240 | |
| 3241 | ExprResult ControllingExpr; |
| 3242 | { |
| 3243 | // C11 6.5.1.1p3 "The controlling expression of a generic selection is |
| 3244 | // not evaluated." |
| 3245 | EnterExpressionEvaluationContext Unevaluated( |
| 3246 | Actions, Sema::ExpressionEvaluationContext::Unevaluated); |
| 3247 | ControllingExpr = |
| 3248 | Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression()); |
| 3249 | if (ControllingExpr.isInvalid()) { |
| 3250 | SkipUntil(tok::r_paren, StopAtSemi); |
| 3251 | return ExprError(); |
| 3252 | } |
| 3253 | } |
| 3254 | |
| 3255 | if (ExpectAndConsume(tok::comma)) { |
| 3256 | SkipUntil(tok::r_paren, StopAtSemi); |
| 3257 | return ExprError(); |
| 3258 | } |
| 3259 | |
| 3260 | SourceLocation DefaultLoc; |
| 3261 | TypeVector Types; |
| 3262 | ExprVector Exprs; |
| 3263 | do { |
| 3264 | ParsedType Ty; |
| 3265 | if (Tok.is(tok::kw_default)) { |
| 3266 | // C11 6.5.1.1p2 "A generic selection shall have no more than one default |
| 3267 | // generic association." |
| 3268 | if (!DefaultLoc.isInvalid()) { |
| 3269 | Diag(Tok, diag::err_duplicate_default_assoc); |
| 3270 | Diag(DefaultLoc, diag::note_previous_default_assoc); |
| 3271 | SkipUntil(tok::r_paren, StopAtSemi); |
| 3272 | return ExprError(); |
| 3273 | } |
| 3274 | DefaultLoc = ConsumeToken(); |
| 3275 | Ty = nullptr; |
| 3276 | } else { |
| 3277 | ColonProtectionRAIIObject X(*this); |
| 3278 | TypeResult TR = ParseTypeName(); |
| 3279 | if (TR.isInvalid()) { |
| 3280 | SkipUntil(tok::r_paren, StopAtSemi); |
| 3281 | return ExprError(); |
| 3282 | } |
| 3283 | Ty = TR.get(); |
| 3284 | } |
| 3285 | Types.push_back(Ty); |
| 3286 | |
| 3287 | if (ExpectAndConsume(tok::colon)) { |
| 3288 | SkipUntil(tok::r_paren, StopAtSemi); |
| 3289 | return ExprError(); |
| 3290 | } |
| 3291 | |
| 3292 | // FIXME: These expressions should be parsed in a potentially potentially |
| 3293 | // evaluated context. |
| 3294 | ExprResult ER( |
| 3295 | Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression())); |
| 3296 | if (ER.isInvalid()) { |
| 3297 | SkipUntil(tok::r_paren, StopAtSemi); |
| 3298 | return ExprError(); |
| 3299 | } |
| 3300 | Exprs.push_back(ER.get()); |
| 3301 | } while (TryConsumeToken(tok::comma)); |
| 3302 | |
| 3303 | T.consumeClose(); |
| 3304 | if (T.getCloseLocation().isInvalid()) |
| 3305 | return ExprError(); |
| 3306 | |
| 3307 | return Actions.ActOnGenericSelectionExpr(KeyLoc, DefaultLoc, |
| 3308 | T.getCloseLocation(), |
| 3309 | ControllingExpr.get(), |
| 3310 | Types, Exprs); |
| 3311 | } |
| 3312 | |
| 3313 | /// Parse A C++1z fold-expression after the opening paren and optional |
| 3314 | /// left-hand-side expression. |
| 3315 | /// |
| 3316 | /// \verbatim |
| 3317 | /// fold-expression: |
| 3318 | /// ( cast-expression fold-operator ... ) |
| 3319 | /// ( ... fold-operator cast-expression ) |
| 3320 | /// ( cast-expression fold-operator ... fold-operator cast-expression ) |
| 3321 | ExprResult Parser::ParseFoldExpression(ExprResult LHS, |
| 3322 | BalancedDelimiterTracker &T) { |
| 3323 | if (LHS.isInvalid()) { |
| 3324 | T.skipToEnd(); |
| 3325 | return true; |
| 3326 | } |
| 3327 | |
| 3328 | tok::TokenKind Kind = tok::unknown; |
| 3329 | SourceLocation FirstOpLoc; |
| 3330 | if (LHS.isUsable()) { |
| 3331 | Kind = Tok.getKind(); |
| 3332 | assert(isFoldOperator(Kind) && "missing fold-operator")(static_cast <bool> (isFoldOperator(Kind) && "missing fold-operator" ) ? void (0) : __assert_fail ("isFoldOperator(Kind) && \"missing fold-operator\"" , "clang/lib/Parse/ParseExpr.cpp", 3332, __extension__ __PRETTY_FUNCTION__ )); |
| 3333 | FirstOpLoc = ConsumeToken(); |
| 3334 | } |
| 3335 | |
| 3336 | assert(Tok.is(tok::ellipsis) && "not a fold-expression")(static_cast <bool> (Tok.is(tok::ellipsis) && "not a fold-expression" ) ? void (0) : __assert_fail ("Tok.is(tok::ellipsis) && \"not a fold-expression\"" , "clang/lib/Parse/ParseExpr.cpp", 3336, __extension__ __PRETTY_FUNCTION__ )); |
| 3337 | SourceLocation EllipsisLoc = ConsumeToken(); |
| 3338 | |
| 3339 | ExprResult RHS; |
| 3340 | if (Tok.isNot(tok::r_paren)) { |
| 3341 | if (!isFoldOperator(Tok.getKind())) |
| 3342 | return Diag(Tok.getLocation(), diag::err_expected_fold_operator); |
| 3343 | |
| 3344 | if (Kind != tok::unknown && Tok.getKind() != Kind) |
| 3345 | Diag(Tok.getLocation(), diag::err_fold_operator_mismatch) |
| 3346 | << SourceRange(FirstOpLoc); |
| 3347 | Kind = Tok.getKind(); |
| 3348 | ConsumeToken(); |
| 3349 | |
| 3350 | RHS = ParseExpression(); |
| 3351 | if (RHS.isInvalid()) { |
| 3352 | T.skipToEnd(); |
| 3353 | return true; |
| 3354 | } |
| 3355 | } |
| 3356 | |
| 3357 | Diag(EllipsisLoc, getLangOpts().CPlusPlus17 |
| 3358 | ? diag::warn_cxx14_compat_fold_expression |
| 3359 | : diag::ext_fold_expression); |
| 3360 | |
| 3361 | T.consumeClose(); |
| 3362 | return Actions.ActOnCXXFoldExpr(getCurScope(), T.getOpenLocation(), LHS.get(), |
| 3363 | Kind, EllipsisLoc, RHS.get(), |
| 3364 | T.getCloseLocation()); |
| 3365 | } |
| 3366 | |
| 3367 | /// ParseExpressionList - Used for C/C++ (argument-)expression-list. |
| 3368 | /// |
| 3369 | /// \verbatim |
| 3370 | /// argument-expression-list: |
| 3371 | /// assignment-expression |
| 3372 | /// argument-expression-list , assignment-expression |
| 3373 | /// |
| 3374 | /// [C++] expression-list: |
| 3375 | /// [C++] assignment-expression |
| 3376 | /// [C++] expression-list , assignment-expression |
| 3377 | /// |
| 3378 | /// [C++0x] expression-list: |
| 3379 | /// [C++0x] initializer-list |
| 3380 | /// |
| 3381 | /// [C++0x] initializer-list |
| 3382 | /// [C++0x] initializer-clause ...[opt] |
| 3383 | /// [C++0x] initializer-list , initializer-clause ...[opt] |
| 3384 | /// |
| 3385 | /// [C++0x] initializer-clause: |
| 3386 | /// [C++0x] assignment-expression |
| 3387 | /// [C++0x] braced-init-list |
| 3388 | /// \endverbatim |
| 3389 | bool Parser::ParseExpressionList(SmallVectorImpl<Expr *> &Exprs, |
| 3390 | SmallVectorImpl<SourceLocation> &CommaLocs, |
| 3391 | llvm::function_ref<void()> ExpressionStarts, |
| 3392 | bool FailImmediatelyOnInvalidExpr, |
| 3393 | bool EarlyTypoCorrection) { |
| 3394 | bool SawError = false; |
| 3395 | while (true) { |
| 3396 | if (ExpressionStarts) |
| 3397 | ExpressionStarts(); |
| 3398 | |
| 3399 | ExprResult Expr; |
| 3400 | if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) { |
| 3401 | Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists); |
| 3402 | Expr = ParseBraceInitializer(); |
| 3403 | } else |
| 3404 | Expr = ParseAssignmentExpression(); |
| 3405 | |
| 3406 | if (EarlyTypoCorrection) |
| 3407 | Expr = Actions.CorrectDelayedTyposInExpr(Expr); |
| 3408 | |
| 3409 | if (Tok.is(tok::ellipsis)) |
| 3410 | Expr = Actions.ActOnPackExpansion(Expr.get(), ConsumeToken()); |
| 3411 | else if (Tok.is(tok::code_completion)) { |
| 3412 | // There's nothing to suggest in here as we parsed a full expression. |
| 3413 | // Instead fail and propogate the error since caller might have something |
| 3414 | // the suggest, e.g. signature help in function call. Note that this is |
| 3415 | // performed before pushing the \p Expr, so that signature help can report |
| 3416 | // current argument correctly. |
| 3417 | SawError = true; |
| 3418 | cutOffParsing(); |
| 3419 | break; |
| 3420 | } |
| 3421 | if (Expr.isInvalid()) { |
| 3422 | SawError = true; |
| 3423 | if (FailImmediatelyOnInvalidExpr) |
| 3424 | break; |
| 3425 | SkipUntil(tok::comma, tok::r_paren, StopBeforeMatch); |
| 3426 | } else { |
| 3427 | Exprs.push_back(Expr.get()); |
| 3428 | } |
| 3429 | |
| 3430 | if (Tok.isNot(tok::comma)) |
| 3431 | break; |
| 3432 | // Move to the next argument, remember where the comma was. |
| 3433 | Token Comma = Tok; |
| 3434 | CommaLocs.push_back(ConsumeToken()); |
| 3435 | |
| 3436 | checkPotentialAngleBracketDelimiter(Comma); |
| 3437 | } |
| 3438 | if (SawError) { |
| 3439 | // Ensure typos get diagnosed when errors were encountered while parsing the |
| 3440 | // expression list. |
| 3441 | for (auto &E : Exprs) { |
| 3442 | ExprResult Expr = Actions.CorrectDelayedTyposInExpr(E); |
| 3443 | if (Expr.isUsable()) E = Expr.get(); |
| 3444 | } |
| 3445 | } |
| 3446 | return SawError; |
| 3447 | } |
| 3448 | |
| 3449 | /// ParseSimpleExpressionList - A simple comma-separated list of expressions, |
| 3450 | /// used for misc language extensions. |
| 3451 | /// |
| 3452 | /// \verbatim |
| 3453 | /// simple-expression-list: |
| 3454 | /// assignment-expression |
| 3455 | /// simple-expression-list , assignment-expression |
| 3456 | /// \endverbatim |
| 3457 | bool |
| 3458 | Parser::ParseSimpleExpressionList(SmallVectorImpl<Expr*> &Exprs, |
| 3459 | SmallVectorImpl<SourceLocation> &CommaLocs) { |
| 3460 | while (true) { |
| 3461 | ExprResult Expr = ParseAssignmentExpression(); |
| 3462 | if (Expr.isInvalid()) |
| 3463 | return true; |
| 3464 | |
| 3465 | Exprs.push_back(Expr.get()); |
| 3466 | |
| 3467 | if (Tok.isNot(tok::comma)) |
| 3468 | return false; |
| 3469 | |
| 3470 | // Move to the next argument, remember where the comma was. |
| 3471 | Token Comma = Tok; |
| 3472 | CommaLocs.push_back(ConsumeToken()); |
| 3473 | |
| 3474 | checkPotentialAngleBracketDelimiter(Comma); |
| 3475 | } |
| 3476 | } |
| 3477 | |
| 3478 | /// ParseBlockId - Parse a block-id, which roughly looks like int (int x). |
| 3479 | /// |
| 3480 | /// \verbatim |
| 3481 | /// [clang] block-id: |
| 3482 | /// [clang] specifier-qualifier-list block-declarator |
| 3483 | /// \endverbatim |
| 3484 | void Parser::ParseBlockId(SourceLocation CaretLoc) { |
| 3485 | if (Tok.is(tok::code_completion)) { |
| 3486 | cutOffParsing(); |
| 3487 | Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Type); |
| 3488 | return; |
| 3489 | } |
| 3490 | |
| 3491 | // Parse the specifier-qualifier-list piece. |
| 3492 | DeclSpec DS(AttrFactory); |
| 3493 | ParseSpecifierQualifierList(DS); |
| 3494 | |
| 3495 | // Parse the block-declarator. |
| 3496 | Declarator DeclaratorInfo(DS, DeclaratorContext::BlockLiteral); |
| 3497 | DeclaratorInfo.setFunctionDefinitionKind(FunctionDefinitionKind::Definition); |
| 3498 | ParseDeclarator(DeclaratorInfo); |
| 3499 | |
| 3500 | MaybeParseGNUAttributes(DeclaratorInfo); |
| 3501 | |
| 3502 | // Inform sema that we are starting a block. |
| 3503 | Actions.ActOnBlockArguments(CaretLoc, DeclaratorInfo, getCurScope()); |
| 3504 | } |
| 3505 | |
| 3506 | /// ParseBlockLiteralExpression - Parse a block literal, which roughly looks |
| 3507 | /// like ^(int x){ return x+1; } |
| 3508 | /// |
| 3509 | /// \verbatim |
| 3510 | /// block-literal: |
| 3511 | /// [clang] '^' block-args[opt] compound-statement |
| 3512 | /// [clang] '^' block-id compound-statement |
| 3513 | /// [clang] block-args: |
| 3514 | /// [clang] '(' parameter-list ')' |
| 3515 | /// \endverbatim |
| 3516 | ExprResult Parser::ParseBlockLiteralExpression() { |
| 3517 | assert(Tok.is(tok::caret) && "block literal starts with ^")(static_cast <bool> (Tok.is(tok::caret) && "block literal starts with ^" ) ? void (0) : __assert_fail ("Tok.is(tok::caret) && \"block literal starts with ^\"" , "clang/lib/Parse/ParseExpr.cpp", 3517, __extension__ __PRETTY_FUNCTION__ )); |
| 3518 | SourceLocation CaretLoc = ConsumeToken(); |
| 3519 | |
| 3520 | PrettyStackTraceLoc CrashInfo(PP.getSourceManager(), CaretLoc, |
| 3521 | "block literal parsing"); |
| 3522 | |
| 3523 | // Enter a scope to hold everything within the block. This includes the |
| 3524 | // argument decls, decls within the compound expression, etc. This also |
| 3525 | // allows determining whether a variable reference inside the block is |
| 3526 | // within or outside of the block. |
| 3527 | ParseScope BlockScope(this, Scope::BlockScope | Scope::FnScope | |
| 3528 | Scope::CompoundStmtScope | Scope::DeclScope); |
| 3529 | |
| 3530 | // Inform sema that we are starting a block. |
| 3531 | Actions.ActOnBlockStart(CaretLoc, getCurScope()); |
| 3532 | |
| 3533 | // Parse the return type if present. |
| 3534 | DeclSpec DS(AttrFactory); |
| 3535 | Declarator ParamInfo(DS, DeclaratorContext::BlockLiteral); |
| 3536 | ParamInfo.setFunctionDefinitionKind(FunctionDefinitionKind::Definition); |
| 3537 | // FIXME: Since the return type isn't actually parsed, it can't be used to |
| 3538 | // fill ParamInfo with an initial valid range, so do it manually. |
| 3539 | ParamInfo.SetSourceRange(SourceRange(Tok.getLocation(), Tok.getLocation())); |
| 3540 | |
| 3541 | // If this block has arguments, parse them. There is no ambiguity here with |
| 3542 | // the expression case, because the expression case requires a parameter list. |
| 3543 | if (Tok.is(tok::l_paren)) { |
| 3544 | ParseParenDeclarator(ParamInfo); |
| 3545 | // Parse the pieces after the identifier as if we had "int(...)". |
| 3546 | // SetIdentifier sets the source range end, but in this case we're past |
| 3547 | // that location. |
| 3548 | SourceLocation Tmp = ParamInfo.getSourceRange().getEnd(); |
| 3549 | ParamInfo.SetIdentifier(nullptr, CaretLoc); |
| 3550 | ParamInfo.SetRangeEnd(Tmp); |
| 3551 | if (ParamInfo.isInvalidType()) { |
| 3552 | // If there was an error parsing the arguments, they may have |
| 3553 | // tried to use ^(x+y) which requires an argument list. Just |
| 3554 | // skip the whole block literal. |
| 3555 | Actions.ActOnBlockError(CaretLoc, getCurScope()); |
| 3556 | return ExprError(); |
| 3557 | } |
| 3558 | |
| 3559 | MaybeParseGNUAttributes(ParamInfo); |
| 3560 | |
| 3561 | // Inform sema that we are starting a block. |
| 3562 | Actions.ActOnBlockArguments(CaretLoc, ParamInfo, getCurScope()); |
| 3563 | } else if (!Tok.is(tok::l_brace)) { |
| 3564 | ParseBlockId(CaretLoc); |
| 3565 | } else { |
| 3566 | // Otherwise, pretend we saw (void). |
| 3567 | SourceLocation NoLoc; |
| 3568 | ParamInfo.AddTypeInfo( |
| 3569 | DeclaratorChunk::getFunction(/*HasProto=*/true, |
| 3570 | /*IsAmbiguous=*/false, |
| 3571 | /*RParenLoc=*/NoLoc, |
| 3572 | /*ArgInfo=*/nullptr, |
| 3573 | /*NumParams=*/0, |
| 3574 | /*EllipsisLoc=*/NoLoc, |
| 3575 | /*RParenLoc=*/NoLoc, |
| 3576 | /*RefQualifierIsLvalueRef=*/true, |
| 3577 | /*RefQualifierLoc=*/NoLoc, |
| 3578 | /*MutableLoc=*/NoLoc, EST_None, |
| 3579 | /*ESpecRange=*/SourceRange(), |
| 3580 | /*Exceptions=*/nullptr, |
| 3581 | /*ExceptionRanges=*/nullptr, |
| 3582 | /*NumExceptions=*/0, |
| 3583 | /*NoexceptExpr=*/nullptr, |
| 3584 | /*ExceptionSpecTokens=*/nullptr, |
| 3585 | /*DeclsInPrototype=*/None, CaretLoc, |
| 3586 | CaretLoc, ParamInfo), |
| 3587 | CaretLoc); |
| 3588 | |
| 3589 | MaybeParseGNUAttributes(ParamInfo); |
| 3590 | |
| 3591 | // Inform sema that we are starting a block. |
| 3592 | Actions.ActOnBlockArguments(CaretLoc, ParamInfo, getCurScope()); |
| 3593 | } |
| 3594 | |
| 3595 | |
| 3596 | ExprResult Result(true); |
| 3597 | if (!Tok.is(tok::l_brace)) { |
| 3598 | // Saw something like: ^expr |
| 3599 | Diag(Tok, diag::err_expected_expression); |
| 3600 | Actions.ActOnBlockError(CaretLoc, getCurScope()); |
| 3601 | return ExprError(); |
| 3602 | } |
| 3603 | |
| 3604 | StmtResult Stmt(ParseCompoundStatementBody()); |
| 3605 | BlockScope.Exit(); |
| 3606 | if (!Stmt.isInvalid()) |
| 3607 | Result = Actions.ActOnBlockStmtExpr(CaretLoc, Stmt.get(), getCurScope()); |
| 3608 | else |
| 3609 | Actions.ActOnBlockError(CaretLoc, getCurScope()); |
| 3610 | return Result; |
| 3611 | } |
| 3612 | |
| 3613 | /// ParseObjCBoolLiteral - This handles the objective-c Boolean literals. |
| 3614 | /// |
| 3615 | /// '__objc_yes' |
| 3616 | /// '__objc_no' |
| 3617 | ExprResult Parser::ParseObjCBoolLiteral() { |
| 3618 | tok::TokenKind Kind = Tok.getKind(); |
| 3619 | return Actions.ActOnObjCBoolLiteral(ConsumeToken(), Kind); |
| 3620 | } |
| 3621 | |
| 3622 | /// Validate availability spec list, emitting diagnostics if necessary. Returns |
| 3623 | /// true if invalid. |
| 3624 | static bool CheckAvailabilitySpecList(Parser &P, |
| 3625 | ArrayRef<AvailabilitySpec> AvailSpecs) { |
| 3626 | llvm::SmallSet<StringRef, 4> Platforms; |
| 3627 | bool HasOtherPlatformSpec = false; |
| 3628 | bool Valid = true; |
| 3629 | for (const auto &Spec : AvailSpecs) { |
| 3630 | if (Spec.isOtherPlatformSpec()) { |
| 3631 | if (HasOtherPlatformSpec) { |
| 3632 | P.Diag(Spec.getBeginLoc(), diag::err_availability_query_repeated_star); |
| 3633 | Valid = false; |
| 3634 | } |
| 3635 | |
| 3636 | HasOtherPlatformSpec = true; |
| 3637 | continue; |
| 3638 | } |
| 3639 | |
| 3640 | bool Inserted = Platforms.insert(Spec.getPlatform()).second; |
| 3641 | if (!Inserted) { |
| 3642 | // Rule out multiple version specs referring to the same platform. |
| 3643 | // For example, we emit an error for: |
| 3644 | // @available(macos 10.10, macos 10.11, *) |
| 3645 | StringRef Platform = Spec.getPlatform(); |
| 3646 | P.Diag(Spec.getBeginLoc(), diag::err_availability_query_repeated_platform) |
| 3647 | << Spec.getEndLoc() << Platform; |
| 3648 | Valid = false; |
| 3649 | } |
| 3650 | } |
| 3651 | |
| 3652 | if (!HasOtherPlatformSpec) { |
| 3653 | SourceLocation InsertWildcardLoc = AvailSpecs.back().getEndLoc(); |
| 3654 | P.Diag(InsertWildcardLoc, diag::err_availability_query_wildcard_required) |
| 3655 | << FixItHint::CreateInsertion(InsertWildcardLoc, ", *"); |
| 3656 | return true; |
| 3657 | } |
| 3658 | |
| 3659 | return !Valid; |
| 3660 | } |
| 3661 | |
| 3662 | /// Parse availability query specification. |
| 3663 | /// |
| 3664 | /// availability-spec: |
| 3665 | /// '*' |
| 3666 | /// identifier version-tuple |
| 3667 | Optional<AvailabilitySpec> Parser::ParseAvailabilitySpec() { |
| 3668 | if (Tok.is(tok::star)) { |
| 3669 | return AvailabilitySpec(ConsumeToken()); |
| 3670 | } else { |
| 3671 | // Parse the platform name. |
| 3672 | if (Tok.is(tok::code_completion)) { |
| 3673 | cutOffParsing(); |
| 3674 | Actions.CodeCompleteAvailabilityPlatformName(); |
| 3675 | return None; |
| 3676 | } |
| 3677 | if (Tok.isNot(tok::identifier)) { |
| 3678 | Diag(Tok, diag::err_avail_query_expected_platform_name); |
| 3679 | return None; |
| 3680 | } |
| 3681 | |
| 3682 | IdentifierLoc *PlatformIdentifier = ParseIdentifierLoc(); |
| 3683 | SourceRange VersionRange; |
| 3684 | VersionTuple Version = ParseVersionTuple(VersionRange); |
| 3685 | |
| 3686 | if (Version.empty()) |
| 3687 | return None; |
| 3688 | |
| 3689 | StringRef GivenPlatform = PlatformIdentifier->Ident->getName(); |
| 3690 | StringRef Platform = |
| 3691 | AvailabilityAttr::canonicalizePlatformName(GivenPlatform); |
| 3692 | |
| 3693 | if (AvailabilityAttr::getPrettyPlatformName(Platform).empty()) { |
| 3694 | Diag(PlatformIdentifier->Loc, |
| 3695 | diag::err_avail_query_unrecognized_platform_name) |
| 3696 | << GivenPlatform; |
| 3697 | return None; |
| 3698 | } |
| 3699 | |
| 3700 | return AvailabilitySpec(Version, Platform, PlatformIdentifier->Loc, |
| 3701 | VersionRange.getEnd()); |
| 3702 | } |
| 3703 | } |
| 3704 | |
| 3705 | ExprResult Parser::ParseAvailabilityCheckExpr(SourceLocation BeginLoc) { |
| 3706 | assert(Tok.is(tok::kw___builtin_available) ||(static_cast <bool> (Tok.is(tok::kw___builtin_available ) || Tok.isObjCAtKeyword(tok::objc_available)) ? void (0) : __assert_fail ("Tok.is(tok::kw___builtin_available) || Tok.isObjCAtKeyword(tok::objc_available)" , "clang/lib/Parse/ParseExpr.cpp", 3707, __extension__ __PRETTY_FUNCTION__ )) |
| 3707 | Tok.isObjCAtKeyword(tok::objc_available))(static_cast <bool> (Tok.is(tok::kw___builtin_available ) || Tok.isObjCAtKeyword(tok::objc_available)) ? void (0) : __assert_fail ("Tok.is(tok::kw___builtin_available) || Tok.isObjCAtKeyword(tok::objc_available)" , "clang/lib/Parse/ParseExpr.cpp", 3707, __extension__ __PRETTY_FUNCTION__ )); |
| 3708 | |
| 3709 | // Eat the available or __builtin_available. |
| 3710 | ConsumeToken(); |
| 3711 | |
| 3712 | BalancedDelimiterTracker Parens(*this, tok::l_paren); |
| 3713 | if (Parens.expectAndConsume()) |
| 3714 | return ExprError(); |
| 3715 | |
| 3716 | SmallVector<AvailabilitySpec, 4> AvailSpecs; |
| 3717 | bool HasError = false; |
| 3718 | while (true) { |
| 3719 | Optional<AvailabilitySpec> Spec = ParseAvailabilitySpec(); |
| 3720 | if (!Spec) |
| 3721 | HasError = true; |
| 3722 | else |
| 3723 | AvailSpecs.push_back(*Spec); |
| 3724 | |
| 3725 | if (!TryConsumeToken(tok::comma)) |
| 3726 | break; |
| 3727 | } |
| 3728 | |
| 3729 | if (HasError) { |
| 3730 | SkipUntil(tok::r_paren, StopAtSemi); |
| 3731 | return ExprError(); |
| 3732 | } |
| 3733 | |
| 3734 | CheckAvailabilitySpecList(*this, AvailSpecs); |
| 3735 | |
| 3736 | if (Parens.consumeClose()) |
| 3737 | return ExprError(); |
| 3738 | |
| 3739 | return Actions.ActOnObjCAvailabilityCheckExpr(AvailSpecs, BeginLoc, |
| 3740 | Parens.getCloseLocation()); |
| 3741 | } |