File: | src/gnu/usr.bin/clang/libclangParse/../../../llvm/clang/lib/Parse/ParseExpr.cpp |
Warning: | line 946, 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 ==((void)0) |
203 | Sema::ExpressionEvaluationContext::ConstantEvaluated &&((void)0) |
204 | "Call this function only if your ExpressionEvaluationContext is "((void)0) |
205 | "already ConstantEvaluated")((void)0); |
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 (1) { |
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())((void)0); |
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_types_compatible_p' '(' type-name ',' type-name ')' |
795 | /// [GNU] '__null' |
796 | /// [OBJC] '[' objc-message-expr ']' |
797 | /// [OBJC] '\@selector' '(' objc-selector-arg ')' |
798 | /// [OBJC] '\@protocol' '(' identifier ')' |
799 | /// [OBJC] '\@encode' '(' type-name ')' |
800 | /// [OBJC] objc-string-literal |
801 | /// [C++] simple-type-specifier '(' expression-list[opt] ')' [C++ 5.2.3] |
802 | /// [C++11] simple-type-specifier braced-init-list [C++11 5.2.3] |
803 | /// [C++] typename-specifier '(' expression-list[opt] ')' [C++ 5.2.3] |
804 | /// [C++11] typename-specifier braced-init-list [C++11 5.2.3] |
805 | /// [C++] 'const_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
806 | /// [C++] 'dynamic_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
807 | /// [C++] 'reinterpret_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
808 | /// [C++] 'static_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
809 | /// [C++] 'typeid' '(' expression ')' [C++ 5.2p1] |
810 | /// [C++] 'typeid' '(' type-id ')' [C++ 5.2p1] |
811 | /// [C++] 'this' [C++ 9.3.2] |
812 | /// [G++] unary-type-trait '(' type-id ')' |
813 | /// [G++] binary-type-trait '(' type-id ',' type-id ')' [TODO] |
814 | /// [EMBT] array-type-trait '(' type-id ',' integer ')' |
815 | /// [clang] '^' block-literal |
816 | /// |
817 | /// constant: [C99 6.4.4] |
818 | /// integer-constant |
819 | /// floating-constant |
820 | /// enumeration-constant -> identifier |
821 | /// character-constant |
822 | /// |
823 | /// id-expression: [C++ 5.1] |
824 | /// unqualified-id |
825 | /// qualified-id |
826 | /// |
827 | /// unqualified-id: [C++ 5.1] |
828 | /// identifier |
829 | /// operator-function-id |
830 | /// conversion-function-id |
831 | /// '~' class-name |
832 | /// template-id |
833 | /// |
834 | /// new-expression: [C++ 5.3.4] |
835 | /// '::'[opt] 'new' new-placement[opt] new-type-id |
836 | /// new-initializer[opt] |
837 | /// '::'[opt] 'new' new-placement[opt] '(' type-id ')' |
838 | /// new-initializer[opt] |
839 | /// |
840 | /// delete-expression: [C++ 5.3.5] |
841 | /// '::'[opt] 'delete' cast-expression |
842 | /// '::'[opt] 'delete' '[' ']' cast-expression |
843 | /// |
844 | /// [GNU/Embarcadero] unary-type-trait: |
845 | /// '__is_arithmetic' |
846 | /// '__is_floating_point' |
847 | /// '__is_integral' |
848 | /// '__is_lvalue_expr' |
849 | /// '__is_rvalue_expr' |
850 | /// '__is_complete_type' |
851 | /// '__is_void' |
852 | /// '__is_array' |
853 | /// '__is_function' |
854 | /// '__is_reference' |
855 | /// '__is_lvalue_reference' |
856 | /// '__is_rvalue_reference' |
857 | /// '__is_fundamental' |
858 | /// '__is_object' |
859 | /// '__is_scalar' |
860 | /// '__is_compound' |
861 | /// '__is_pointer' |
862 | /// '__is_member_object_pointer' |
863 | /// '__is_member_function_pointer' |
864 | /// '__is_member_pointer' |
865 | /// '__is_const' |
866 | /// '__is_volatile' |
867 | /// '__is_trivial' |
868 | /// '__is_standard_layout' |
869 | /// '__is_signed' |
870 | /// '__is_unsigned' |
871 | /// |
872 | /// [GNU] unary-type-trait: |
873 | /// '__has_nothrow_assign' |
874 | /// '__has_nothrow_copy' |
875 | /// '__has_nothrow_constructor' |
876 | /// '__has_trivial_assign' [TODO] |
877 | /// '__has_trivial_copy' [TODO] |
878 | /// '__has_trivial_constructor' |
879 | /// '__has_trivial_destructor' |
880 | /// '__has_virtual_destructor' |
881 | /// '__is_abstract' [TODO] |
882 | /// '__is_class' |
883 | /// '__is_empty' [TODO] |
884 | /// '__is_enum' |
885 | /// '__is_final' |
886 | /// '__is_pod' |
887 | /// '__is_polymorphic' |
888 | /// '__is_sealed' [MS] |
889 | /// '__is_trivial' |
890 | /// '__is_union' |
891 | /// '__has_unique_object_representations' |
892 | /// |
893 | /// [Clang] unary-type-trait: |
894 | /// '__is_aggregate' |
895 | /// '__trivially_copyable' |
896 | /// |
897 | /// binary-type-trait: |
898 | /// [GNU] '__is_base_of' |
899 | /// [MS] '__is_convertible_to' |
900 | /// '__is_convertible' |
901 | /// '__is_same' |
902 | /// |
903 | /// [Embarcadero] array-type-trait: |
904 | /// '__array_rank' |
905 | /// '__array_extent' |
906 | /// |
907 | /// [Embarcadero] expression-trait: |
908 | /// '__is_lvalue_expr' |
909 | /// '__is_rvalue_expr' |
910 | /// \endverbatim |
911 | /// |
912 | ExprResult Parser::ParseCastExpression(CastParseKind ParseKind, |
913 | bool isAddressOfOperand, |
914 | bool &NotCastExpr, |
915 | TypeCastState isTypeCast, |
916 | bool isVectorLiteral, |
917 | bool *NotPrimaryExpression) { |
918 | ExprResult Res; |
919 | tok::TokenKind SavedKind = Tok.getKind(); |
920 | auto SavedType = PreferredType; |
921 | NotCastExpr = false; |
922 | |
923 | // Are postfix-expression suffix operators permitted after this |
924 | // cast-expression? If not, and we find some, we'll parse them anyway and |
925 | // diagnose them. |
926 | bool AllowSuffix = true; |
927 | |
928 | // This handles all of cast-expression, unary-expression, postfix-expression, |
929 | // and primary-expression. We handle them together like this for efficiency |
930 | // and to simplify handling of an expression starting with a '(' token: which |
931 | // may be one of a parenthesized expression, cast-expression, compound literal |
932 | // expression, or statement expression. |
933 | // |
934 | // If the parsed tokens consist of a primary-expression, the cases below |
935 | // break out of the switch; at the end we call ParsePostfixExpressionSuffix |
936 | // to handle the postfix expression suffixes. Cases that cannot be followed |
937 | // by postfix exprs should set AllowSuffix to false. |
938 | switch (SavedKind) { |
939 | case tok::l_paren: { |
940 | // If this expression is limited to being a unary-expression, the paren can |
941 | // not start a cast expression. |
942 | ParenParseOption ParenExprType; |
943 | switch (ParseKind) { |
944 | case CastParseKind::UnaryExprOnly: |
945 | if (!getLangOpts().CPlusPlus) |
946 | ParenExprType = CompoundLiteral; |
Value stored to 'ParenExprType' is never read | |
947 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
948 | case CastParseKind::AnyCastExpr: |
949 | ParenExprType = ParenParseOption::CastExpr; |
950 | break; |
951 | case CastParseKind::PrimaryExprOnly: |
952 | ParenExprType = FoldExpr; |
953 | break; |
954 | } |
955 | ParsedType CastTy; |
956 | SourceLocation RParenLoc; |
957 | Res = ParseParenExpression(ParenExprType, false/*stopIfCastExr*/, |
958 | isTypeCast == IsTypeCast, CastTy, RParenLoc); |
959 | |
960 | // FIXME: What should we do if a vector literal is followed by a |
961 | // postfix-expression suffix? Usually postfix operators are permitted on |
962 | // literals. |
963 | if (isVectorLiteral) |
964 | return Res; |
965 | |
966 | switch (ParenExprType) { |
967 | case SimpleExpr: break; // Nothing else to do. |
968 | case CompoundStmt: break; // Nothing else to do. |
969 | case CompoundLiteral: |
970 | // We parsed '(' type-name ')' '{' ... '}'. If any suffixes of |
971 | // postfix-expression exist, parse them now. |
972 | break; |
973 | case CastExpr: |
974 | // We have parsed the cast-expression and no postfix-expr pieces are |
975 | // following. |
976 | return Res; |
977 | case FoldExpr: |
978 | // We only parsed a fold-expression. There might be postfix-expr pieces |
979 | // afterwards; parse them now. |
980 | break; |
981 | } |
982 | |
983 | break; |
984 | } |
985 | |
986 | // primary-expression |
987 | case tok::numeric_constant: |
988 | // constant: integer-constant |
989 | // constant: floating-constant |
990 | |
991 | Res = Actions.ActOnNumericConstant(Tok, /*UDLScope*/getCurScope()); |
992 | ConsumeToken(); |
993 | break; |
994 | |
995 | case tok::kw_true: |
996 | case tok::kw_false: |
997 | Res = ParseCXXBoolLiteral(); |
998 | break; |
999 | |
1000 | case tok::kw___objc_yes: |
1001 | case tok::kw___objc_no: |
1002 | Res = ParseObjCBoolLiteral(); |
1003 | break; |
1004 | |
1005 | case tok::kw_nullptr: |
1006 | Diag(Tok, diag::warn_cxx98_compat_nullptr); |
1007 | Res = Actions.ActOnCXXNullPtrLiteral(ConsumeToken()); |
1008 | break; |
1009 | |
1010 | case tok::annot_primary_expr: |
1011 | case tok::annot_overload_set: |
1012 | Res = getExprAnnotation(Tok); |
1013 | if (!Res.isInvalid() && Tok.getKind() == tok::annot_overload_set) |
1014 | Res = Actions.ActOnNameClassifiedAsOverloadSet(getCurScope(), Res.get()); |
1015 | ConsumeAnnotationToken(); |
1016 | if (!Res.isInvalid() && Tok.is(tok::less)) |
1017 | checkPotentialAngleBracket(Res); |
1018 | break; |
1019 | |
1020 | case tok::annot_non_type: |
1021 | case tok::annot_non_type_dependent: |
1022 | case tok::annot_non_type_undeclared: { |
1023 | CXXScopeSpec SS; |
1024 | Token Replacement; |
1025 | Res = tryParseCXXIdExpression(SS, isAddressOfOperand, Replacement); |
1026 | assert(!Res.isUnset() &&((void)0) |
1027 | "should not perform typo correction on annotation token")((void)0); |
1028 | break; |
1029 | } |
1030 | |
1031 | case tok::kw___super: |
1032 | case tok::kw_decltype: |
1033 | // Annotate the token and tail recurse. |
1034 | if (TryAnnotateTypeOrScopeToken()) |
1035 | return ExprError(); |
1036 | assert(Tok.isNot(tok::kw_decltype) && Tok.isNot(tok::kw___super))((void)0); |
1037 | return ParseCastExpression(ParseKind, isAddressOfOperand, isTypeCast, |
1038 | isVectorLiteral, NotPrimaryExpression); |
1039 | |
1040 | case tok::identifier: { // primary-expression: identifier |
1041 | // unqualified-id: identifier |
1042 | // constant: enumeration-constant |
1043 | // Turn a potentially qualified name into a annot_typename or |
1044 | // annot_cxxscope if it would be valid. This handles things like x::y, etc. |
1045 | if (getLangOpts().CPlusPlus) { |
1046 | // Avoid the unnecessary parse-time lookup in the common case |
1047 | // where the syntax forbids a type. |
1048 | const Token &Next = NextToken(); |
1049 | |
1050 | // If this identifier was reverted from a token ID, and the next token |
1051 | // is a parenthesis, this is likely to be a use of a type trait. Check |
1052 | // those tokens. |
1053 | if (Next.is(tok::l_paren) && |
1054 | Tok.is(tok::identifier) && |
1055 | Tok.getIdentifierInfo()->hasRevertedTokenIDToIdentifier()) { |
1056 | IdentifierInfo *II = Tok.getIdentifierInfo(); |
1057 | // Build up the mapping of revertible type traits, for future use. |
1058 | if (RevertibleTypeTraits.empty()) { |
1059 | #define RTT_JOIN(X,Y) X##Y |
1060 | #define REVERTIBLE_TYPE_TRAIT(Name) \ |
1061 | RevertibleTypeTraits[PP.getIdentifierInfo(#Name)] \ |
1062 | = RTT_JOIN(tok::kw_,Name) |
1063 | |
1064 | REVERTIBLE_TYPE_TRAIT(__is_abstract); |
1065 | REVERTIBLE_TYPE_TRAIT(__is_aggregate); |
1066 | REVERTIBLE_TYPE_TRAIT(__is_arithmetic); |
1067 | REVERTIBLE_TYPE_TRAIT(__is_array); |
1068 | REVERTIBLE_TYPE_TRAIT(__is_assignable); |
1069 | REVERTIBLE_TYPE_TRAIT(__is_base_of); |
1070 | REVERTIBLE_TYPE_TRAIT(__is_class); |
1071 | REVERTIBLE_TYPE_TRAIT(__is_complete_type); |
1072 | REVERTIBLE_TYPE_TRAIT(__is_compound); |
1073 | REVERTIBLE_TYPE_TRAIT(__is_const); |
1074 | REVERTIBLE_TYPE_TRAIT(__is_constructible); |
1075 | REVERTIBLE_TYPE_TRAIT(__is_convertible); |
1076 | REVERTIBLE_TYPE_TRAIT(__is_convertible_to); |
1077 | REVERTIBLE_TYPE_TRAIT(__is_destructible); |
1078 | REVERTIBLE_TYPE_TRAIT(__is_empty); |
1079 | REVERTIBLE_TYPE_TRAIT(__is_enum); |
1080 | REVERTIBLE_TYPE_TRAIT(__is_floating_point); |
1081 | REVERTIBLE_TYPE_TRAIT(__is_final); |
1082 | REVERTIBLE_TYPE_TRAIT(__is_function); |
1083 | REVERTIBLE_TYPE_TRAIT(__is_fundamental); |
1084 | REVERTIBLE_TYPE_TRAIT(__is_integral); |
1085 | REVERTIBLE_TYPE_TRAIT(__is_interface_class); |
1086 | REVERTIBLE_TYPE_TRAIT(__is_literal); |
1087 | REVERTIBLE_TYPE_TRAIT(__is_lvalue_expr); |
1088 | REVERTIBLE_TYPE_TRAIT(__is_lvalue_reference); |
1089 | REVERTIBLE_TYPE_TRAIT(__is_member_function_pointer); |
1090 | REVERTIBLE_TYPE_TRAIT(__is_member_object_pointer); |
1091 | REVERTIBLE_TYPE_TRAIT(__is_member_pointer); |
1092 | REVERTIBLE_TYPE_TRAIT(__is_nothrow_assignable); |
1093 | REVERTIBLE_TYPE_TRAIT(__is_nothrow_constructible); |
1094 | REVERTIBLE_TYPE_TRAIT(__is_nothrow_destructible); |
1095 | REVERTIBLE_TYPE_TRAIT(__is_object); |
1096 | REVERTIBLE_TYPE_TRAIT(__is_pod); |
1097 | REVERTIBLE_TYPE_TRAIT(__is_pointer); |
1098 | REVERTIBLE_TYPE_TRAIT(__is_polymorphic); |
1099 | REVERTIBLE_TYPE_TRAIT(__is_reference); |
1100 | REVERTIBLE_TYPE_TRAIT(__is_rvalue_expr); |
1101 | REVERTIBLE_TYPE_TRAIT(__is_rvalue_reference); |
1102 | REVERTIBLE_TYPE_TRAIT(__is_same); |
1103 | REVERTIBLE_TYPE_TRAIT(__is_scalar); |
1104 | REVERTIBLE_TYPE_TRAIT(__is_sealed); |
1105 | REVERTIBLE_TYPE_TRAIT(__is_signed); |
1106 | REVERTIBLE_TYPE_TRAIT(__is_standard_layout); |
1107 | REVERTIBLE_TYPE_TRAIT(__is_trivial); |
1108 | REVERTIBLE_TYPE_TRAIT(__is_trivially_assignable); |
1109 | REVERTIBLE_TYPE_TRAIT(__is_trivially_constructible); |
1110 | REVERTIBLE_TYPE_TRAIT(__is_trivially_copyable); |
1111 | REVERTIBLE_TYPE_TRAIT(__is_union); |
1112 | REVERTIBLE_TYPE_TRAIT(__is_unsigned); |
1113 | REVERTIBLE_TYPE_TRAIT(__is_void); |
1114 | REVERTIBLE_TYPE_TRAIT(__is_volatile); |
1115 | #undef REVERTIBLE_TYPE_TRAIT |
1116 | #undef RTT_JOIN |
1117 | } |
1118 | |
1119 | // If we find that this is in fact the name of a type trait, |
1120 | // update the token kind in place and parse again to treat it as |
1121 | // the appropriate kind of type trait. |
1122 | llvm::SmallDenseMap<IdentifierInfo *, tok::TokenKind>::iterator Known |
1123 | = RevertibleTypeTraits.find(II); |
1124 | if (Known != RevertibleTypeTraits.end()) { |
1125 | Tok.setKind(Known->second); |
1126 | return ParseCastExpression(ParseKind, isAddressOfOperand, |
1127 | NotCastExpr, isTypeCast, |
1128 | isVectorLiteral, NotPrimaryExpression); |
1129 | } |
1130 | } |
1131 | |
1132 | if ((!ColonIsSacred && Next.is(tok::colon)) || |
1133 | Next.isOneOf(tok::coloncolon, tok::less, tok::l_paren, |
1134 | tok::l_brace)) { |
1135 | // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse. |
1136 | if (TryAnnotateTypeOrScopeToken()) |
1137 | return ExprError(); |
1138 | if (!Tok.is(tok::identifier)) |
1139 | return ParseCastExpression(ParseKind, isAddressOfOperand, |
1140 | NotCastExpr, isTypeCast, |
1141 | isVectorLiteral, |
1142 | NotPrimaryExpression); |
1143 | } |
1144 | } |
1145 | |
1146 | // Consume the identifier so that we can see if it is followed by a '(' or |
1147 | // '.'. |
1148 | IdentifierInfo &II = *Tok.getIdentifierInfo(); |
1149 | SourceLocation ILoc = ConsumeToken(); |
1150 | |
1151 | // Support 'Class.property' and 'super.property' notation. |
1152 | if (getLangOpts().ObjC && Tok.is(tok::period) && |
1153 | (Actions.getTypeName(II, ILoc, getCurScope()) || |
1154 | // Allow the base to be 'super' if in an objc-method. |
1155 | (&II == Ident_super && getCurScope()->isInObjcMethodScope()))) { |
1156 | ConsumeToken(); |
1157 | |
1158 | if (Tok.is(tok::code_completion) && &II != Ident_super) { |
1159 | cutOffParsing(); |
1160 | Actions.CodeCompleteObjCClassPropertyRefExpr( |
1161 | getCurScope(), II, ILoc, ExprStatementTokLoc == ILoc); |
1162 | return ExprError(); |
1163 | } |
1164 | // Allow either an identifier or the keyword 'class' (in C++). |
1165 | if (Tok.isNot(tok::identifier) && |
1166 | !(getLangOpts().CPlusPlus && Tok.is(tok::kw_class))) { |
1167 | Diag(Tok, diag::err_expected_property_name); |
1168 | return ExprError(); |
1169 | } |
1170 | IdentifierInfo &PropertyName = *Tok.getIdentifierInfo(); |
1171 | SourceLocation PropertyLoc = ConsumeToken(); |
1172 | |
1173 | Res = Actions.ActOnClassPropertyRefExpr(II, PropertyName, |
1174 | ILoc, PropertyLoc); |
1175 | break; |
1176 | } |
1177 | |
1178 | // In an Objective-C method, if we have "super" followed by an identifier, |
1179 | // the token sequence is ill-formed. However, if there's a ':' or ']' after |
1180 | // that identifier, this is probably a message send with a missing open |
1181 | // bracket. Treat it as such. |
1182 | if (getLangOpts().ObjC && &II == Ident_super && !InMessageExpression && |
1183 | getCurScope()->isInObjcMethodScope() && |
1184 | ((Tok.is(tok::identifier) && |
1185 | (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) || |
1186 | Tok.is(tok::code_completion))) { |
1187 | Res = ParseObjCMessageExpressionBody(SourceLocation(), ILoc, nullptr, |
1188 | nullptr); |
1189 | break; |
1190 | } |
1191 | |
1192 | // If we have an Objective-C class name followed by an identifier |
1193 | // and either ':' or ']', this is an Objective-C class message |
1194 | // send that's missing the opening '['. Recovery |
1195 | // appropriately. Also take this path if we're performing code |
1196 | // completion after an Objective-C class name. |
1197 | if (getLangOpts().ObjC && |
1198 | ((Tok.is(tok::identifier) && !InMessageExpression) || |
1199 | Tok.is(tok::code_completion))) { |
1200 | const Token& Next = NextToken(); |
1201 | if (Tok.is(tok::code_completion) || |
1202 | Next.is(tok::colon) || Next.is(tok::r_square)) |
1203 | if (ParsedType Typ = Actions.getTypeName(II, ILoc, getCurScope())) |
1204 | if (Typ.get()->isObjCObjectOrInterfaceType()) { |
1205 | // Fake up a Declarator to use with ActOnTypeName. |
1206 | DeclSpec DS(AttrFactory); |
1207 | DS.SetRangeStart(ILoc); |
1208 | DS.SetRangeEnd(ILoc); |
1209 | const char *PrevSpec = nullptr; |
1210 | unsigned DiagID; |
1211 | DS.SetTypeSpecType(TST_typename, ILoc, PrevSpec, DiagID, Typ, |
1212 | Actions.getASTContext().getPrintingPolicy()); |
1213 | |
1214 | Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName); |
1215 | TypeResult Ty = Actions.ActOnTypeName(getCurScope(), |
1216 | DeclaratorInfo); |
1217 | if (Ty.isInvalid()) |
1218 | break; |
1219 | |
1220 | Res = ParseObjCMessageExpressionBody(SourceLocation(), |
1221 | SourceLocation(), |
1222 | Ty.get(), nullptr); |
1223 | break; |
1224 | } |
1225 | } |
1226 | |
1227 | // Make sure to pass down the right value for isAddressOfOperand. |
1228 | if (isAddressOfOperand && isPostfixExpressionSuffixStart()) |
1229 | isAddressOfOperand = false; |
1230 | |
1231 | // Function designators are allowed to be undeclared (C99 6.5.1p2), so we |
1232 | // need to know whether or not this identifier is a function designator or |
1233 | // not. |
1234 | UnqualifiedId Name; |
1235 | CXXScopeSpec ScopeSpec; |
1236 | SourceLocation TemplateKWLoc; |
1237 | Token Replacement; |
1238 | CastExpressionIdValidator Validator( |
1239 | /*Next=*/Tok, |
1240 | /*AllowTypes=*/isTypeCast != NotTypeCast, |
1241 | /*AllowNonTypes=*/isTypeCast != IsTypeCast); |
1242 | Validator.IsAddressOfOperand = isAddressOfOperand; |
1243 | if (Tok.isOneOf(tok::periodstar, tok::arrowstar)) { |
1244 | Validator.WantExpressionKeywords = false; |
1245 | Validator.WantRemainingKeywords = false; |
1246 | } else { |
1247 | Validator.WantRemainingKeywords = Tok.isNot(tok::r_paren); |
1248 | } |
1249 | Name.setIdentifier(&II, ILoc); |
1250 | Res = Actions.ActOnIdExpression( |
1251 | getCurScope(), ScopeSpec, TemplateKWLoc, Name, Tok.is(tok::l_paren), |
1252 | isAddressOfOperand, &Validator, |
1253 | /*IsInlineAsmIdentifier=*/false, |
1254 | Tok.is(tok::r_paren) ? nullptr : &Replacement); |
1255 | if (!Res.isInvalid() && Res.isUnset()) { |
1256 | UnconsumeToken(Replacement); |
1257 | return ParseCastExpression(ParseKind, isAddressOfOperand, |
1258 | NotCastExpr, isTypeCast, |
1259 | /*isVectorLiteral=*/false, |
1260 | NotPrimaryExpression); |
1261 | } |
1262 | if (!Res.isInvalid() && Tok.is(tok::less)) |
1263 | checkPotentialAngleBracket(Res); |
1264 | break; |
1265 | } |
1266 | case tok::char_constant: // constant: character-constant |
1267 | case tok::wide_char_constant: |
1268 | case tok::utf8_char_constant: |
1269 | case tok::utf16_char_constant: |
1270 | case tok::utf32_char_constant: |
1271 | Res = Actions.ActOnCharacterConstant(Tok, /*UDLScope*/getCurScope()); |
1272 | ConsumeToken(); |
1273 | break; |
1274 | case tok::kw___func__: // primary-expression: __func__ [C99 6.4.2.2] |
1275 | case tok::kw___FUNCTION__: // primary-expression: __FUNCTION__ [GNU] |
1276 | case tok::kw___FUNCDNAME__: // primary-expression: __FUNCDNAME__ [MS] |
1277 | case tok::kw___FUNCSIG__: // primary-expression: __FUNCSIG__ [MS] |
1278 | case tok::kw_L__FUNCTION__: // primary-expression: L__FUNCTION__ [MS] |
1279 | case tok::kw_L__FUNCSIG__: // primary-expression: L__FUNCSIG__ [MS] |
1280 | case tok::kw___PRETTY_FUNCTION__: // primary-expression: __P..Y_F..N__ [GNU] |
1281 | Res = Actions.ActOnPredefinedExpr(Tok.getLocation(), SavedKind); |
1282 | ConsumeToken(); |
1283 | break; |
1284 | case tok::string_literal: // primary-expression: string-literal |
1285 | case tok::wide_string_literal: |
1286 | case tok::utf8_string_literal: |
1287 | case tok::utf16_string_literal: |
1288 | case tok::utf32_string_literal: |
1289 | Res = ParseStringLiteralExpression(true); |
1290 | break; |
1291 | case tok::kw__Generic: // primary-expression: generic-selection [C11 6.5.1] |
1292 | Res = ParseGenericSelectionExpression(); |
1293 | break; |
1294 | case tok::kw___builtin_available: |
1295 | Res = ParseAvailabilityCheckExpr(Tok.getLocation()); |
1296 | break; |
1297 | case tok::kw___builtin_va_arg: |
1298 | case tok::kw___builtin_offsetof: |
1299 | case tok::kw___builtin_choose_expr: |
1300 | case tok::kw___builtin_astype: // primary-expression: [OCL] as_type() |
1301 | case tok::kw___builtin_convertvector: |
1302 | case tok::kw___builtin_COLUMN: |
1303 | case tok::kw___builtin_FILE: |
1304 | case tok::kw___builtin_FUNCTION: |
1305 | case tok::kw___builtin_LINE: |
1306 | if (NotPrimaryExpression) |
1307 | *NotPrimaryExpression = true; |
1308 | // This parses the complete suffix; we can return early. |
1309 | return ParseBuiltinPrimaryExpression(); |
1310 | case tok::kw___null: |
1311 | Res = Actions.ActOnGNUNullExpr(ConsumeToken()); |
1312 | break; |
1313 | |
1314 | case tok::plusplus: // unary-expression: '++' unary-expression [C99] |
1315 | case tok::minusminus: { // unary-expression: '--' unary-expression [C99] |
1316 | if (NotPrimaryExpression) |
1317 | *NotPrimaryExpression = true; |
1318 | // C++ [expr.unary] has: |
1319 | // unary-expression: |
1320 | // ++ cast-expression |
1321 | // -- cast-expression |
1322 | Token SavedTok = Tok; |
1323 | ConsumeToken(); |
1324 | |
1325 | PreferredType.enterUnary(Actions, Tok.getLocation(), SavedTok.getKind(), |
1326 | SavedTok.getLocation()); |
1327 | // One special case is implicitly handled here: if the preceding tokens are |
1328 | // an ambiguous cast expression, such as "(T())++", then we recurse to |
1329 | // determine whether the '++' is prefix or postfix. |
1330 | Res = ParseCastExpression(getLangOpts().CPlusPlus ? |
1331 | UnaryExprOnly : AnyCastExpr, |
1332 | /*isAddressOfOperand*/false, NotCastExpr, |
1333 | NotTypeCast); |
1334 | if (NotCastExpr) { |
1335 | // If we return with NotCastExpr = true, we must not consume any tokens, |
1336 | // so put the token back where we found it. |
1337 | assert(Res.isInvalid())((void)0); |
1338 | UnconsumeToken(SavedTok); |
1339 | return ExprError(); |
1340 | } |
1341 | if (!Res.isInvalid()) { |
1342 | Expr *Arg = Res.get(); |
1343 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedTok.getLocation(), |
1344 | SavedKind, Arg); |
1345 | if (Res.isInvalid()) |
1346 | Res = Actions.CreateRecoveryExpr(SavedTok.getLocation(), |
1347 | Arg->getEndLoc(), Arg); |
1348 | } |
1349 | return Res; |
1350 | } |
1351 | case tok::amp: { // unary-expression: '&' cast-expression |
1352 | if (NotPrimaryExpression) |
1353 | *NotPrimaryExpression = true; |
1354 | // Special treatment because of member pointers |
1355 | SourceLocation SavedLoc = ConsumeToken(); |
1356 | PreferredType.enterUnary(Actions, Tok.getLocation(), tok::amp, SavedLoc); |
1357 | Res = ParseCastExpression(AnyCastExpr, true); |
1358 | if (!Res.isInvalid()) { |
1359 | Expr *Arg = Res.get(); |
1360 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Arg); |
1361 | if (Res.isInvalid()) |
1362 | Res = Actions.CreateRecoveryExpr(Tok.getLocation(), Arg->getEndLoc(), |
1363 | Arg); |
1364 | } |
1365 | return Res; |
1366 | } |
1367 | |
1368 | case tok::star: // unary-expression: '*' cast-expression |
1369 | case tok::plus: // unary-expression: '+' cast-expression |
1370 | case tok::minus: // unary-expression: '-' cast-expression |
1371 | case tok::tilde: // unary-expression: '~' cast-expression |
1372 | case tok::exclaim: // unary-expression: '!' cast-expression |
1373 | case tok::kw___real: // unary-expression: '__real' cast-expression [GNU] |
1374 | case tok::kw___imag: { // unary-expression: '__imag' cast-expression [GNU] |
1375 | if (NotPrimaryExpression) |
1376 | *NotPrimaryExpression = true; |
1377 | SourceLocation SavedLoc = ConsumeToken(); |
1378 | PreferredType.enterUnary(Actions, Tok.getLocation(), SavedKind, SavedLoc); |
1379 | Res = ParseCastExpression(AnyCastExpr); |
1380 | if (!Res.isInvalid()) { |
1381 | Expr *Arg = Res.get(); |
1382 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Arg); |
1383 | if (Res.isInvalid()) |
1384 | Res = Actions.CreateRecoveryExpr(SavedLoc, Arg->getEndLoc(), Arg); |
1385 | } |
1386 | return Res; |
1387 | } |
1388 | |
1389 | case tok::kw_co_await: { // unary-expression: 'co_await' cast-expression |
1390 | if (NotPrimaryExpression) |
1391 | *NotPrimaryExpression = true; |
1392 | SourceLocation CoawaitLoc = ConsumeToken(); |
1393 | Res = ParseCastExpression(AnyCastExpr); |
1394 | if (!Res.isInvalid()) |
1395 | Res = Actions.ActOnCoawaitExpr(getCurScope(), CoawaitLoc, Res.get()); |
1396 | return Res; |
1397 | } |
1398 | |
1399 | case tok::kw___extension__:{//unary-expression:'__extension__' cast-expr [GNU] |
1400 | // __extension__ silences extension warnings in the subexpression. |
1401 | if (NotPrimaryExpression) |
1402 | *NotPrimaryExpression = true; |
1403 | ExtensionRAIIObject O(Diags); // Use RAII to do this. |
1404 | SourceLocation SavedLoc = ConsumeToken(); |
1405 | Res = ParseCastExpression(AnyCastExpr); |
1406 | if (!Res.isInvalid()) |
1407 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get()); |
1408 | return Res; |
1409 | } |
1410 | case tok::kw__Alignof: // unary-expression: '_Alignof' '(' type-name ')' |
1411 | if (!getLangOpts().C11) |
1412 | Diag(Tok, diag::ext_c11_feature) << Tok.getName(); |
1413 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
1414 | case tok::kw_alignof: // unary-expression: 'alignof' '(' type-id ')' |
1415 | case tok::kw___alignof: // unary-expression: '__alignof' unary-expression |
1416 | // unary-expression: '__alignof' '(' type-name ')' |
1417 | case tok::kw_sizeof: // unary-expression: 'sizeof' unary-expression |
1418 | // unary-expression: 'sizeof' '(' type-name ')' |
1419 | case tok::kw_vec_step: // unary-expression: OpenCL 'vec_step' expression |
1420 | // unary-expression: '__builtin_omp_required_simd_align' '(' type-name ')' |
1421 | case tok::kw___builtin_omp_required_simd_align: |
1422 | if (NotPrimaryExpression) |
1423 | *NotPrimaryExpression = true; |
1424 | AllowSuffix = false; |
1425 | Res = ParseUnaryExprOrTypeTraitExpression(); |
1426 | break; |
1427 | case tok::ampamp: { // unary-expression: '&&' identifier |
1428 | if (NotPrimaryExpression) |
1429 | *NotPrimaryExpression = true; |
1430 | SourceLocation AmpAmpLoc = ConsumeToken(); |
1431 | if (Tok.isNot(tok::identifier)) |
1432 | return ExprError(Diag(Tok, diag::err_expected) << tok::identifier); |
1433 | |
1434 | if (getCurScope()->getFnParent() == nullptr) |
1435 | return ExprError(Diag(Tok, diag::err_address_of_label_outside_fn)); |
1436 | |
1437 | Diag(AmpAmpLoc, diag::ext_gnu_address_of_label); |
1438 | LabelDecl *LD = Actions.LookupOrCreateLabel(Tok.getIdentifierInfo(), |
1439 | Tok.getLocation()); |
1440 | Res = Actions.ActOnAddrLabel(AmpAmpLoc, Tok.getLocation(), LD); |
1441 | ConsumeToken(); |
1442 | AllowSuffix = false; |
1443 | break; |
1444 | } |
1445 | case tok::kw_const_cast: |
1446 | case tok::kw_dynamic_cast: |
1447 | case tok::kw_reinterpret_cast: |
1448 | case tok::kw_static_cast: |
1449 | case tok::kw_addrspace_cast: |
1450 | if (NotPrimaryExpression) |
1451 | *NotPrimaryExpression = true; |
1452 | Res = ParseCXXCasts(); |
1453 | break; |
1454 | case tok::kw___builtin_bit_cast: |
1455 | if (NotPrimaryExpression) |
1456 | *NotPrimaryExpression = true; |
1457 | Res = ParseBuiltinBitCast(); |
1458 | break; |
1459 | case tok::kw_typeid: |
1460 | if (NotPrimaryExpression) |
1461 | *NotPrimaryExpression = true; |
1462 | Res = ParseCXXTypeid(); |
1463 | break; |
1464 | case tok::kw___uuidof: |
1465 | if (NotPrimaryExpression) |
1466 | *NotPrimaryExpression = true; |
1467 | Res = ParseCXXUuidof(); |
1468 | break; |
1469 | case tok::kw_this: |
1470 | Res = ParseCXXThis(); |
1471 | break; |
1472 | case tok::kw___builtin_sycl_unique_stable_name: |
1473 | Res = ParseSYCLUniqueStableNameExpression(); |
1474 | break; |
1475 | |
1476 | case tok::annot_typename: |
1477 | if (isStartOfObjCClassMessageMissingOpenBracket()) { |
1478 | TypeResult Type = getTypeAnnotation(Tok); |
1479 | |
1480 | // Fake up a Declarator to use with ActOnTypeName. |
1481 | DeclSpec DS(AttrFactory); |
1482 | DS.SetRangeStart(Tok.getLocation()); |
1483 | DS.SetRangeEnd(Tok.getLastLoc()); |
1484 | |
1485 | const char *PrevSpec = nullptr; |
1486 | unsigned DiagID; |
1487 | DS.SetTypeSpecType(TST_typename, Tok.getAnnotationEndLoc(), |
1488 | PrevSpec, DiagID, Type, |
1489 | Actions.getASTContext().getPrintingPolicy()); |
1490 | |
1491 | Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName); |
1492 | TypeResult Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
1493 | if (Ty.isInvalid()) |
1494 | break; |
1495 | |
1496 | ConsumeAnnotationToken(); |
1497 | Res = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(), |
1498 | Ty.get(), nullptr); |
1499 | break; |
1500 | } |
1501 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
1502 | |
1503 | case tok::annot_decltype: |
1504 | case tok::kw_char: |
1505 | case tok::kw_wchar_t: |
1506 | case tok::kw_char8_t: |
1507 | case tok::kw_char16_t: |
1508 | case tok::kw_char32_t: |
1509 | case tok::kw_bool: |
1510 | case tok::kw_short: |
1511 | case tok::kw_int: |
1512 | case tok::kw_long: |
1513 | case tok::kw___int64: |
1514 | case tok::kw___int128: |
1515 | case tok::kw__ExtInt: |
1516 | case tok::kw_signed: |
1517 | case tok::kw_unsigned: |
1518 | case tok::kw_half: |
1519 | case tok::kw_float: |
1520 | case tok::kw_double: |
1521 | case tok::kw___bf16: |
1522 | case tok::kw__Float16: |
1523 | case tok::kw___float128: |
1524 | case tok::kw_void: |
1525 | case tok::kw_typename: |
1526 | case tok::kw_typeof: |
1527 | case tok::kw___vector: |
1528 | #define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t: |
1529 | #include "clang/Basic/OpenCLImageTypes.def" |
1530 | { |
1531 | if (!getLangOpts().CPlusPlus) { |
1532 | Diag(Tok, diag::err_expected_expression); |
1533 | return ExprError(); |
1534 | } |
1535 | |
1536 | // Everything henceforth is a postfix-expression. |
1537 | if (NotPrimaryExpression) |
1538 | *NotPrimaryExpression = true; |
1539 | |
1540 | if (SavedKind == tok::kw_typename) { |
1541 | // postfix-expression: typename-specifier '(' expression-list[opt] ')' |
1542 | // typename-specifier braced-init-list |
1543 | if (TryAnnotateTypeOrScopeToken()) |
1544 | return ExprError(); |
1545 | |
1546 | if (!Actions.isSimpleTypeSpecifier(Tok.getKind())) |
1547 | // We are trying to parse a simple-type-specifier but might not get such |
1548 | // a token after error recovery. |
1549 | return ExprError(); |
1550 | } |
1551 | |
1552 | // postfix-expression: simple-type-specifier '(' expression-list[opt] ')' |
1553 | // simple-type-specifier braced-init-list |
1554 | // |
1555 | DeclSpec DS(AttrFactory); |
1556 | |
1557 | ParseCXXSimpleTypeSpecifier(DS); |
1558 | if (Tok.isNot(tok::l_paren) && |
1559 | (!getLangOpts().CPlusPlus11 || Tok.isNot(tok::l_brace))) |
1560 | return ExprError(Diag(Tok, diag::err_expected_lparen_after_type) |
1561 | << DS.getSourceRange()); |
1562 | |
1563 | if (Tok.is(tok::l_brace)) |
1564 | Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists); |
1565 | |
1566 | Res = ParseCXXTypeConstructExpression(DS); |
1567 | break; |
1568 | } |
1569 | |
1570 | case tok::annot_cxxscope: { // [C++] id-expression: qualified-id |
1571 | // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse. |
1572 | // (We can end up in this situation after tentative parsing.) |
1573 | if (TryAnnotateTypeOrScopeToken()) |
1574 | return ExprError(); |
1575 | if (!Tok.is(tok::annot_cxxscope)) |
1576 | return ParseCastExpression(ParseKind, isAddressOfOperand, NotCastExpr, |
1577 | isTypeCast, isVectorLiteral, |
1578 | NotPrimaryExpression); |
1579 | |
1580 | Token Next = NextToken(); |
1581 | if (Next.is(tok::annot_template_id)) { |
1582 | TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Next); |
1583 | if (TemplateId->Kind == TNK_Type_template) { |
1584 | // We have a qualified template-id that we know refers to a |
1585 | // type, translate it into a type and continue parsing as a |
1586 | // cast expression. |
1587 | CXXScopeSpec SS; |
1588 | ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr, |
1589 | /*ObjectHadErrors=*/false, |
1590 | /*EnteringContext=*/false); |
1591 | AnnotateTemplateIdTokenAsType(SS); |
1592 | return ParseCastExpression(ParseKind, isAddressOfOperand, NotCastExpr, |
1593 | isTypeCast, isVectorLiteral, |
1594 | NotPrimaryExpression); |
1595 | } |
1596 | } |
1597 | |
1598 | // Parse as an id-expression. |
1599 | Res = ParseCXXIdExpression(isAddressOfOperand); |
1600 | break; |
1601 | } |
1602 | |
1603 | case tok::annot_template_id: { // [C++] template-id |
1604 | TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); |
1605 | if (TemplateId->Kind == TNK_Type_template) { |
1606 | // We have a template-id that we know refers to a type, |
1607 | // translate it into a type and continue parsing as a cast |
1608 | // expression. |
1609 | CXXScopeSpec SS; |
1610 | AnnotateTemplateIdTokenAsType(SS); |
1611 | return ParseCastExpression(ParseKind, isAddressOfOperand, |
1612 | NotCastExpr, isTypeCast, isVectorLiteral, |
1613 | NotPrimaryExpression); |
1614 | } |
1615 | |
1616 | // Fall through to treat the template-id as an id-expression. |
1617 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
1618 | } |
1619 | |
1620 | case tok::kw_operator: // [C++] id-expression: operator/conversion-function-id |
1621 | Res = ParseCXXIdExpression(isAddressOfOperand); |
1622 | break; |
1623 | |
1624 | case tok::coloncolon: { |
1625 | // ::foo::bar -> global qualified name etc. If TryAnnotateTypeOrScopeToken |
1626 | // annotates the token, tail recurse. |
1627 | if (TryAnnotateTypeOrScopeToken()) |
1628 | return ExprError(); |
1629 | if (!Tok.is(tok::coloncolon)) |
1630 | return ParseCastExpression(ParseKind, isAddressOfOperand, isTypeCast, |
1631 | isVectorLiteral, NotPrimaryExpression); |
1632 | |
1633 | // ::new -> [C++] new-expression |
1634 | // ::delete -> [C++] delete-expression |
1635 | SourceLocation CCLoc = ConsumeToken(); |
1636 | if (Tok.is(tok::kw_new)) { |
1637 | if (NotPrimaryExpression) |
1638 | *NotPrimaryExpression = true; |
1639 | Res = ParseCXXNewExpression(true, CCLoc); |
1640 | AllowSuffix = false; |
1641 | break; |
1642 | } |
1643 | if (Tok.is(tok::kw_delete)) { |
1644 | if (NotPrimaryExpression) |
1645 | *NotPrimaryExpression = true; |
1646 | Res = ParseCXXDeleteExpression(true, CCLoc); |
1647 | AllowSuffix = false; |
1648 | break; |
1649 | } |
1650 | |
1651 | // This is not a type name or scope specifier, it is an invalid expression. |
1652 | Diag(CCLoc, diag::err_expected_expression); |
1653 | return ExprError(); |
1654 | } |
1655 | |
1656 | case tok::kw_new: // [C++] new-expression |
1657 | if (NotPrimaryExpression) |
1658 | *NotPrimaryExpression = true; |
1659 | Res = ParseCXXNewExpression(false, Tok.getLocation()); |
1660 | AllowSuffix = false; |
1661 | break; |
1662 | |
1663 | case tok::kw_delete: // [C++] delete-expression |
1664 | if (NotPrimaryExpression) |
1665 | *NotPrimaryExpression = true; |
1666 | Res = ParseCXXDeleteExpression(false, Tok.getLocation()); |
1667 | AllowSuffix = false; |
1668 | break; |
1669 | |
1670 | case tok::kw_requires: // [C++2a] requires-expression |
1671 | Res = ParseRequiresExpression(); |
1672 | AllowSuffix = false; |
1673 | break; |
1674 | |
1675 | case tok::kw_noexcept: { // [C++0x] 'noexcept' '(' expression ')' |
1676 | if (NotPrimaryExpression) |
1677 | *NotPrimaryExpression = true; |
1678 | Diag(Tok, diag::warn_cxx98_compat_noexcept_expr); |
1679 | SourceLocation KeyLoc = ConsumeToken(); |
1680 | BalancedDelimiterTracker T(*this, tok::l_paren); |
1681 | |
1682 | if (T.expectAndConsume(diag::err_expected_lparen_after, "noexcept")) |
1683 | return ExprError(); |
1684 | // C++11 [expr.unary.noexcept]p1: |
1685 | // The noexcept operator determines whether the evaluation of its operand, |
1686 | // which is an unevaluated operand, can throw an exception. |
1687 | EnterExpressionEvaluationContext Unevaluated( |
1688 | Actions, Sema::ExpressionEvaluationContext::Unevaluated); |
1689 | Res = ParseExpression(); |
1690 | |
1691 | T.consumeClose(); |
1692 | |
1693 | if (!Res.isInvalid()) |
1694 | Res = Actions.ActOnNoexceptExpr(KeyLoc, T.getOpenLocation(), Res.get(), |
1695 | T.getCloseLocation()); |
1696 | AllowSuffix = false; |
1697 | break; |
1698 | } |
1699 | |
1700 | #define TYPE_TRAIT(N,Spelling,K) \ |
1701 | case tok::kw_##Spelling: |
1702 | #include "clang/Basic/TokenKinds.def" |
1703 | Res = ParseTypeTrait(); |
1704 | break; |
1705 | |
1706 | case tok::kw___array_rank: |
1707 | case tok::kw___array_extent: |
1708 | if (NotPrimaryExpression) |
1709 | *NotPrimaryExpression = true; |
1710 | Res = ParseArrayTypeTrait(); |
1711 | break; |
1712 | |
1713 | case tok::kw___is_lvalue_expr: |
1714 | case tok::kw___is_rvalue_expr: |
1715 | if (NotPrimaryExpression) |
1716 | *NotPrimaryExpression = true; |
1717 | Res = ParseExpressionTrait(); |
1718 | break; |
1719 | |
1720 | case tok::at: { |
1721 | if (NotPrimaryExpression) |
1722 | *NotPrimaryExpression = true; |
1723 | SourceLocation AtLoc = ConsumeToken(); |
1724 | return ParseObjCAtExpression(AtLoc); |
1725 | } |
1726 | case tok::caret: |
1727 | Res = ParseBlockLiteralExpression(); |
1728 | break; |
1729 | case tok::code_completion: { |
1730 | cutOffParsing(); |
1731 | Actions.CodeCompleteExpression(getCurScope(), |
1732 | PreferredType.get(Tok.getLocation())); |
1733 | return ExprError(); |
1734 | } |
1735 | case tok::l_square: |
1736 | if (getLangOpts().CPlusPlus11) { |
1737 | if (getLangOpts().ObjC) { |
1738 | // C++11 lambda expressions and Objective-C message sends both start with a |
1739 | // square bracket. There are three possibilities here: |
1740 | // we have a valid lambda expression, we have an invalid lambda |
1741 | // expression, or we have something that doesn't appear to be a lambda. |
1742 | // If we're in the last case, we fall back to ParseObjCMessageExpression. |
1743 | Res = TryParseLambdaExpression(); |
1744 | if (!Res.isInvalid() && !Res.get()) { |
1745 | // We assume Objective-C++ message expressions are not |
1746 | // primary-expressions. |
1747 | if (NotPrimaryExpression) |
1748 | *NotPrimaryExpression = true; |
1749 | Res = ParseObjCMessageExpression(); |
1750 | } |
1751 | break; |
1752 | } |
1753 | Res = ParseLambdaExpression(); |
1754 | break; |
1755 | } |
1756 | if (getLangOpts().ObjC) { |
1757 | Res = ParseObjCMessageExpression(); |
1758 | break; |
1759 | } |
1760 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
1761 | default: |
1762 | NotCastExpr = true; |
1763 | return ExprError(); |
1764 | } |
1765 | |
1766 | // Check to see whether Res is a function designator only. If it is and we |
1767 | // are compiling for OpenCL, we need to return an error as this implies |
1768 | // that the address of the function is being taken, which is illegal in CL. |
1769 | |
1770 | if (ParseKind == PrimaryExprOnly) |
1771 | // This is strictly a primary-expression - no postfix-expr pieces should be |
1772 | // parsed. |
1773 | return Res; |
1774 | |
1775 | if (!AllowSuffix) { |
1776 | // FIXME: Don't parse a primary-expression suffix if we encountered a parse |
1777 | // error already. |
1778 | if (Res.isInvalid()) |
1779 | return Res; |
1780 | |
1781 | switch (Tok.getKind()) { |
1782 | case tok::l_square: |
1783 | case tok::l_paren: |
1784 | case tok::plusplus: |
1785 | case tok::minusminus: |
1786 | // "expected ';'" or similar is probably the right diagnostic here. Let |
1787 | // the caller decide what to do. |
1788 | if (Tok.isAtStartOfLine()) |
1789 | return Res; |
1790 | |
1791 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
1792 | case tok::period: |
1793 | case tok::arrow: |
1794 | break; |
1795 | |
1796 | default: |
1797 | return Res; |
1798 | } |
1799 | |
1800 | // This was a unary-expression for which a postfix-expression suffix is |
1801 | // not permitted by the grammar (eg, a sizeof expression or |
1802 | // new-expression or similar). Diagnose but parse the suffix anyway. |
1803 | Diag(Tok.getLocation(), diag::err_postfix_after_unary_requires_parens) |
1804 | << Tok.getKind() << Res.get()->getSourceRange() |
1805 | << FixItHint::CreateInsertion(Res.get()->getBeginLoc(), "(") |
1806 | << FixItHint::CreateInsertion(PP.getLocForEndOfToken(PrevTokLocation), |
1807 | ")"); |
1808 | } |
1809 | |
1810 | // These can be followed by postfix-expr pieces. |
1811 | PreferredType = SavedType; |
1812 | Res = ParsePostfixExpressionSuffix(Res); |
1813 | if (getLangOpts().OpenCL && |
1814 | !getActions().getOpenCLOptions().isAvailableOption( |
1815 | "__cl_clang_function_pointers", getLangOpts())) |
1816 | if (Expr *PostfixExpr = Res.get()) { |
1817 | QualType Ty = PostfixExpr->getType(); |
1818 | if (!Ty.isNull() && Ty->isFunctionType()) { |
1819 | Diag(PostfixExpr->getExprLoc(), |
1820 | diag::err_opencl_taking_function_address_parser); |
1821 | return ExprError(); |
1822 | } |
1823 | } |
1824 | |
1825 | return Res; |
1826 | } |
1827 | |
1828 | /// Once the leading part of a postfix-expression is parsed, this |
1829 | /// method parses any suffixes that apply. |
1830 | /// |
1831 | /// \verbatim |
1832 | /// postfix-expression: [C99 6.5.2] |
1833 | /// primary-expression |
1834 | /// postfix-expression '[' expression ']' |
1835 | /// postfix-expression '[' braced-init-list ']' |
1836 | /// postfix-expression '(' argument-expression-list[opt] ')' |
1837 | /// postfix-expression '.' identifier |
1838 | /// postfix-expression '->' identifier |
1839 | /// postfix-expression '++' |
1840 | /// postfix-expression '--' |
1841 | /// '(' type-name ')' '{' initializer-list '}' |
1842 | /// '(' type-name ')' '{' initializer-list ',' '}' |
1843 | /// |
1844 | /// argument-expression-list: [C99 6.5.2] |
1845 | /// argument-expression ...[opt] |
1846 | /// argument-expression-list ',' assignment-expression ...[opt] |
1847 | /// \endverbatim |
1848 | ExprResult |
1849 | Parser::ParsePostfixExpressionSuffix(ExprResult LHS) { |
1850 | // Now that the primary-expression piece of the postfix-expression has been |
1851 | // parsed, see if there are any postfix-expression pieces here. |
1852 | SourceLocation Loc; |
1853 | auto SavedType = PreferredType; |
1854 | while (1) { |
1855 | // Each iteration relies on preferred type for the whole expression. |
1856 | PreferredType = SavedType; |
1857 | switch (Tok.getKind()) { |
1858 | case tok::code_completion: |
1859 | if (InMessageExpression) |
1860 | return LHS; |
1861 | |
1862 | cutOffParsing(); |
1863 | Actions.CodeCompletePostfixExpression( |
1864 | getCurScope(), LHS, PreferredType.get(Tok.getLocation())); |
1865 | return ExprError(); |
1866 | |
1867 | case tok::identifier: |
1868 | // If we see identifier: after an expression, and we're not already in a |
1869 | // message send, then this is probably a message send with a missing |
1870 | // opening bracket '['. |
1871 | if (getLangOpts().ObjC && !InMessageExpression && |
1872 | (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) { |
1873 | LHS = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(), |
1874 | nullptr, LHS.get()); |
1875 | break; |
1876 | } |
1877 | // Fall through; this isn't a message send. |
1878 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; |
1879 | |
1880 | default: // Not a postfix-expression suffix. |
1881 | return LHS; |
1882 | case tok::l_square: { // postfix-expression: p-e '[' expression ']' |
1883 | // If we have a array postfix expression that starts on a new line and |
1884 | // Objective-C is enabled, it is highly likely that the user forgot a |
1885 | // semicolon after the base expression and that the array postfix-expr is |
1886 | // actually another message send. In this case, do some look-ahead to see |
1887 | // if the contents of the square brackets are obviously not a valid |
1888 | // expression and recover by pretending there is no suffix. |
1889 | if (getLangOpts().ObjC && Tok.isAtStartOfLine() && |
1890 | isSimpleObjCMessageExpression()) |
1891 | return LHS; |
1892 | |
1893 | // Reject array indices starting with a lambda-expression. '[[' is |
1894 | // reserved for attributes. |
1895 | if (CheckProhibitedCXX11Attribute()) { |
1896 | (void)Actions.CorrectDelayedTyposInExpr(LHS); |
1897 | return ExprError(); |
1898 | } |
1899 | |
1900 | BalancedDelimiterTracker T(*this, tok::l_square); |
1901 | T.consumeOpen(); |
1902 | Loc = T.getOpenLocation(); |
1903 | ExprResult Idx, Length, Stride; |
1904 | SourceLocation ColonLocFirst, ColonLocSecond; |
1905 | PreferredType.enterSubscript(Actions, Tok.getLocation(), LHS.get()); |
1906 | if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) { |
1907 | Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists); |
1908 | Idx = ParseBraceInitializer(); |
1909 | } else if (getLangOpts().OpenMP) { |
1910 | ColonProtectionRAIIObject RAII(*this); |
1911 | // Parse [: or [ expr or [ expr : |
1912 | if (!Tok.is(tok::colon)) { |
1913 | // [ expr |
1914 | Idx = ParseExpression(); |
1915 | } |
1916 | if (Tok.is(tok::colon)) { |
1917 | // Consume ':' |
1918 | ColonLocFirst = ConsumeToken(); |
1919 | if (Tok.isNot(tok::r_square) && |
1920 | (getLangOpts().OpenMP < 50 || |
1921 | ((Tok.isNot(tok::colon) && getLangOpts().OpenMP >= 50)))) |
1922 | Length = ParseExpression(); |
1923 | } |
1924 | if (getLangOpts().OpenMP >= 50 && |
1925 | (OMPClauseKind == llvm::omp::Clause::OMPC_to || |
1926 | OMPClauseKind == llvm::omp::Clause::OMPC_from) && |
1927 | Tok.is(tok::colon)) { |
1928 | // Consume ':' |
1929 | ColonLocSecond = ConsumeToken(); |
1930 | if (Tok.isNot(tok::r_square)) { |
1931 | Stride = ParseExpression(); |
1932 | } |
1933 | } |
1934 | } else |
1935 | Idx = ParseExpression(); |
1936 | |
1937 | SourceLocation RLoc = Tok.getLocation(); |
1938 | |
1939 | LHS = Actions.CorrectDelayedTyposInExpr(LHS); |
1940 | Idx = Actions.CorrectDelayedTyposInExpr(Idx); |
1941 | Length = Actions.CorrectDelayedTyposInExpr(Length); |
1942 | if (!LHS.isInvalid() && !Idx.isInvalid() && !Length.isInvalid() && |
1943 | !Stride.isInvalid() && Tok.is(tok::r_square)) { |
1944 | if (ColonLocFirst.isValid() || ColonLocSecond.isValid()) { |
1945 | LHS = Actions.ActOnOMPArraySectionExpr( |
1946 | LHS.get(), Loc, Idx.get(), ColonLocFirst, ColonLocSecond, |
1947 | Length.get(), Stride.get(), RLoc); |
1948 | } else { |
1949 | LHS = Actions.ActOnArraySubscriptExpr(getCurScope(), LHS.get(), Loc, |
1950 | Idx.get(), RLoc); |
1951 | } |
1952 | } else { |
1953 | LHS = ExprError(); |
1954 | Idx = ExprError(); |
1955 | } |
1956 | |
1957 | // Match the ']'. |
1958 | T.consumeClose(); |
1959 | break; |
1960 | } |
1961 | |
1962 | case tok::l_paren: // p-e: p-e '(' argument-expression-list[opt] ')' |
1963 | case tok::lesslessless: { // p-e: p-e '<<<' argument-expression-list '>>>' |
1964 | // '(' argument-expression-list[opt] ')' |
1965 | tok::TokenKind OpKind = Tok.getKind(); |
1966 | InMessageExpressionRAIIObject InMessage(*this, false); |
1967 | |
1968 | Expr *ExecConfig = nullptr; |
1969 | |
1970 | BalancedDelimiterTracker PT(*this, tok::l_paren); |
1971 | |
1972 | if (OpKind == tok::lesslessless) { |
1973 | ExprVector ExecConfigExprs; |
1974 | CommaLocsTy ExecConfigCommaLocs; |
1975 | SourceLocation OpenLoc = ConsumeToken(); |
1976 | |
1977 | if (ParseSimpleExpressionList(ExecConfigExprs, ExecConfigCommaLocs)) { |
1978 | (void)Actions.CorrectDelayedTyposInExpr(LHS); |
1979 | LHS = ExprError(); |
1980 | } |
1981 | |
1982 | SourceLocation CloseLoc; |
1983 | if (TryConsumeToken(tok::greatergreatergreater, CloseLoc)) { |
1984 | } else if (LHS.isInvalid()) { |
1985 | SkipUntil(tok::greatergreatergreater, StopAtSemi); |
1986 | } else { |
1987 | // There was an error closing the brackets |
1988 | Diag(Tok, diag::err_expected) << tok::greatergreatergreater; |
1989 | Diag(OpenLoc, diag::note_matching) << tok::lesslessless; |
1990 | SkipUntil(tok::greatergreatergreater, StopAtSemi); |
1991 | LHS = ExprError(); |
1992 | } |
1993 | |
1994 | if (!LHS.isInvalid()) { |
1995 | if (ExpectAndConsume(tok::l_paren)) |
1996 | LHS = ExprError(); |
1997 | else |
1998 | Loc = PrevTokLocation; |
1999 | } |
2000 | |
2001 | if (!LHS.isInvalid()) { |
2002 | ExprResult ECResult = Actions.ActOnCUDAExecConfigExpr(getCurScope(), |
2003 | OpenLoc, |
2004 | ExecConfigExprs, |
2005 | CloseLoc); |
2006 | if (ECResult.isInvalid()) |
2007 | LHS = ExprError(); |
2008 | else |
2009 | ExecConfig = ECResult.get(); |
2010 | } |
2011 | } else { |
2012 | PT.consumeOpen(); |
2013 | Loc = PT.getOpenLocation(); |
2014 | } |
2015 | |
2016 | ExprVector ArgExprs; |
2017 | CommaLocsTy CommaLocs; |
2018 | auto RunSignatureHelp = [&]() -> QualType { |
2019 | QualType PreferredType = Actions.ProduceCallSignatureHelp( |
2020 | getCurScope(), LHS.get(), ArgExprs, PT.getOpenLocation()); |
2021 | CalledSignatureHelp = true; |
2022 | return PreferredType; |
2023 | }; |
2024 | if (OpKind == tok::l_paren || !LHS.isInvalid()) { |
2025 | if (Tok.isNot(tok::r_paren)) { |
2026 | if (ParseExpressionList(ArgExprs, CommaLocs, [&] { |
2027 | PreferredType.enterFunctionArgument(Tok.getLocation(), |
2028 | RunSignatureHelp); |
2029 | })) { |
2030 | (void)Actions.CorrectDelayedTyposInExpr(LHS); |
2031 | // If we got an error when parsing expression list, we don't call |
2032 | // the CodeCompleteCall handler inside the parser. So call it here |
2033 | // to make sure we get overload suggestions even when we are in the |
2034 | // middle of a parameter. |
2035 | if (PP.isCodeCompletionReached() && !CalledSignatureHelp) |
2036 | RunSignatureHelp(); |
2037 | LHS = ExprError(); |
2038 | } else if (LHS.isInvalid()) { |
2039 | for (auto &E : ArgExprs) |
2040 | Actions.CorrectDelayedTyposInExpr(E); |
2041 | } |
2042 | } |
2043 | } |
2044 | |
2045 | // Match the ')'. |
2046 | if (LHS.isInvalid()) { |
2047 | SkipUntil(tok::r_paren, StopAtSemi); |
2048 | } else if (Tok.isNot(tok::r_paren)) { |
2049 | bool HadDelayedTypo = false; |
2050 | if (Actions.CorrectDelayedTyposInExpr(LHS).get() != LHS.get()) |
2051 | HadDelayedTypo = true; |
2052 | for (auto &E : ArgExprs) |
2053 | if (Actions.CorrectDelayedTyposInExpr(E).get() != E) |
2054 | HadDelayedTypo = true; |
2055 | // If there were delayed typos in the LHS or ArgExprs, call SkipUntil |
2056 | // instead of PT.consumeClose() to avoid emitting extra diagnostics for |
2057 | // the unmatched l_paren. |
2058 | if (HadDelayedTypo) |
2059 | SkipUntil(tok::r_paren, StopAtSemi); |
2060 | else |
2061 | PT.consumeClose(); |
2062 | LHS = ExprError(); |
2063 | } else { |
2064 | assert(((void)0) |
2065 | (ArgExprs.size() == 0 || ArgExprs.size() - 1 == CommaLocs.size()) &&((void)0) |
2066 | "Unexpected number of commas!")((void)0); |
2067 | Expr *Fn = LHS.get(); |
2068 | SourceLocation RParLoc = Tok.getLocation(); |
2069 | LHS = Actions.ActOnCallExpr(getCurScope(), Fn, Loc, ArgExprs, RParLoc, |
2070 | ExecConfig); |
2071 | if (LHS.isInvalid()) { |
2072 | ArgExprs.insert(ArgExprs.begin(), Fn); |
2073 | LHS = |
2074 | Actions.CreateRecoveryExpr(Fn->getBeginLoc(), RParLoc, ArgExprs); |
2075 | } |
2076 | PT.consumeClose(); |
2077 | } |
2078 | |
2079 | break; |
2080 | } |
2081 | case tok::arrow: |
2082 | case tok::period: { |
2083 | // postfix-expression: p-e '->' template[opt] id-expression |
2084 | // postfix-expression: p-e '.' template[opt] id-expression |
2085 | tok::TokenKind OpKind = Tok.getKind(); |
2086 | SourceLocation OpLoc = ConsumeToken(); // Eat the "." or "->" token. |
2087 | |
2088 | CXXScopeSpec SS; |
2089 | ParsedType ObjectType; |
2090 | bool MayBePseudoDestructor = false; |
2091 | Expr* OrigLHS = !LHS.isInvalid() ? LHS.get() : nullptr; |
2092 | |
2093 | PreferredType.enterMemAccess(Actions, Tok.getLocation(), OrigLHS); |
2094 | |
2095 | if (getLangOpts().CPlusPlus && !LHS.isInvalid()) { |
2096 | Expr *Base = OrigLHS; |
2097 | const Type* BaseType = Base->getType().getTypePtrOrNull(); |
2098 | if (BaseType && Tok.is(tok::l_paren) && |
2099 | (BaseType->isFunctionType() || |
2100 | BaseType->isSpecificPlaceholderType(BuiltinType::BoundMember))) { |
2101 | Diag(OpLoc, diag::err_function_is_not_record) |
2102 | << OpKind << Base->getSourceRange() |
2103 | << FixItHint::CreateRemoval(OpLoc); |
2104 | return ParsePostfixExpressionSuffix(Base); |
2105 | } |
2106 | |
2107 | LHS = Actions.ActOnStartCXXMemberReference(getCurScope(), Base, OpLoc, |
2108 | OpKind, ObjectType, |
2109 | MayBePseudoDestructor); |
2110 | if (LHS.isInvalid()) { |
2111 | // Clang will try to perform expression based completion as a |
2112 | // fallback, which is confusing in case of member references. So we |
2113 | // stop here without any completions. |
2114 | if (Tok.is(tok::code_completion)) { |
2115 | cutOffParsing(); |
2116 | return ExprError(); |
2117 | } |
2118 | break; |
2119 | } |
2120 | ParseOptionalCXXScopeSpecifier( |
2121 | SS, ObjectType, LHS.get() && LHS.get()->containsErrors(), |
2122 | /*EnteringContext=*/false, &MayBePseudoDestructor); |
2123 | if (SS.isNotEmpty()) |
2124 | ObjectType = nullptr; |
2125 | } |
2126 | |
2127 | if (Tok.is(tok::code_completion)) { |
2128 | tok::TokenKind CorrectedOpKind = |
2129 | OpKind == tok::arrow ? tok::period : tok::arrow; |
2130 | ExprResult CorrectedLHS(/*Invalid=*/true); |
2131 | if (getLangOpts().CPlusPlus && OrigLHS) { |
2132 | // FIXME: Creating a TentativeAnalysisScope from outside Sema is a |
2133 | // hack. |
2134 | Sema::TentativeAnalysisScope Trap(Actions); |
2135 | CorrectedLHS = Actions.ActOnStartCXXMemberReference( |
2136 | getCurScope(), OrigLHS, OpLoc, CorrectedOpKind, ObjectType, |
2137 | MayBePseudoDestructor); |
2138 | } |
2139 | |
2140 | Expr *Base = LHS.get(); |
2141 | Expr *CorrectedBase = CorrectedLHS.get(); |
2142 | if (!CorrectedBase && !getLangOpts().CPlusPlus) |
2143 | CorrectedBase = Base; |
2144 | |
2145 | // Code completion for a member access expression. |
2146 | cutOffParsing(); |
2147 | Actions.CodeCompleteMemberReferenceExpr( |
2148 | getCurScope(), Base, CorrectedBase, OpLoc, OpKind == tok::arrow, |
2149 | Base && ExprStatementTokLoc == Base->getBeginLoc(), |
2150 | PreferredType.get(Tok.getLocation())); |
2151 | |
2152 | return ExprError(); |
2153 | } |
2154 | |
2155 | if (MayBePseudoDestructor && !LHS.isInvalid()) { |
2156 | LHS = ParseCXXPseudoDestructor(LHS.get(), OpLoc, OpKind, SS, |
2157 | ObjectType); |
2158 | break; |
2159 | } |
2160 | |
2161 | // Either the action has told us that this cannot be a |
2162 | // pseudo-destructor expression (based on the type of base |
2163 | // expression), or we didn't see a '~' in the right place. We |
2164 | // can still parse a destructor name here, but in that case it |
2165 | // names a real destructor. |
2166 | // Allow explicit constructor calls in Microsoft mode. |
2167 | // FIXME: Add support for explicit call of template constructor. |
2168 | SourceLocation TemplateKWLoc; |
2169 | UnqualifiedId Name; |
2170 | if (getLangOpts().ObjC && OpKind == tok::period && |
2171 | Tok.is(tok::kw_class)) { |
2172 | // Objective-C++: |
2173 | // After a '.' in a member access expression, treat the keyword |
2174 | // 'class' as if it were an identifier. |
2175 | // |
2176 | // This hack allows property access to the 'class' method because it is |
2177 | // such a common method name. For other C++ keywords that are |
2178 | // Objective-C method names, one must use the message send syntax. |
2179 | IdentifierInfo *Id = Tok.getIdentifierInfo(); |
2180 | SourceLocation Loc = ConsumeToken(); |
2181 | Name.setIdentifier(Id, Loc); |
2182 | } else if (ParseUnqualifiedId( |
2183 | SS, ObjectType, LHS.get() && LHS.get()->containsErrors(), |
2184 | /*EnteringContext=*/false, |
2185 | /*AllowDestructorName=*/true, |
2186 | /*AllowConstructorName=*/ |
2187 | getLangOpts().MicrosoftExt && SS.isNotEmpty(), |
2188 | /*AllowDeductionGuide=*/false, &TemplateKWLoc, Name)) { |
2189 | (void)Actions.CorrectDelayedTyposInExpr(LHS); |
2190 | LHS = ExprError(); |
2191 | } |
2192 | |
2193 | if (!LHS.isInvalid()) |
2194 | LHS = Actions.ActOnMemberAccessExpr(getCurScope(), LHS.get(), OpLoc, |
2195 | OpKind, SS, TemplateKWLoc, Name, |
2196 | CurParsedObjCImpl ? CurParsedObjCImpl->Dcl |
2197 | : nullptr); |
2198 | if (!LHS.isInvalid()) { |
2199 | if (Tok.is(tok::less)) |
2200 | checkPotentialAngleBracket(LHS); |
2201 | } else if (OrigLHS && Name.isValid()) { |
2202 | // Preserve the LHS if the RHS is an invalid member. |
2203 | LHS = Actions.CreateRecoveryExpr(OrigLHS->getBeginLoc(), |
2204 | Name.getEndLoc(), {OrigLHS}); |
2205 | } |
2206 | break; |
2207 | } |
2208 | case tok::plusplus: // postfix-expression: postfix-expression '++' |
2209 | case tok::minusminus: // postfix-expression: postfix-expression '--' |
2210 | if (!LHS.isInvalid()) { |
2211 | Expr *Arg = LHS.get(); |
2212 | LHS = Actions.ActOnPostfixUnaryOp(getCurScope(), Tok.getLocation(), |
2213 | Tok.getKind(), Arg); |
2214 | if (LHS.isInvalid()) |
2215 | LHS = Actions.CreateRecoveryExpr(Arg->getBeginLoc(), |
2216 | Tok.getLocation(), Arg); |
2217 | } |
2218 | ConsumeToken(); |
2219 | break; |
2220 | } |
2221 | } |
2222 | } |
2223 | |
2224 | /// ParseExprAfterUnaryExprOrTypeTrait - We parsed a typeof/sizeof/alignof/ |
2225 | /// vec_step and we are at the start of an expression or a parenthesized |
2226 | /// type-id. OpTok is the operand token (typeof/sizeof/alignof). Returns the |
2227 | /// expression (isCastExpr == false) or the type (isCastExpr == true). |
2228 | /// |
2229 | /// \verbatim |
2230 | /// unary-expression: [C99 6.5.3] |
2231 | /// 'sizeof' unary-expression |
2232 | /// 'sizeof' '(' type-name ')' |
2233 | /// [GNU] '__alignof' unary-expression |
2234 | /// [GNU] '__alignof' '(' type-name ')' |
2235 | /// [C11] '_Alignof' '(' type-name ')' |
2236 | /// [C++0x] 'alignof' '(' type-id ')' |
2237 | /// |
2238 | /// [GNU] typeof-specifier: |
2239 | /// typeof ( expressions ) |
2240 | /// typeof ( type-name ) |
2241 | /// [GNU/C++] typeof unary-expression |
2242 | /// |
2243 | /// [OpenCL 1.1 6.11.12] vec_step built-in function: |
2244 | /// vec_step ( expressions ) |
2245 | /// vec_step ( type-name ) |
2246 | /// \endverbatim |
2247 | ExprResult |
2248 | Parser::ParseExprAfterUnaryExprOrTypeTrait(const Token &OpTok, |
2249 | bool &isCastExpr, |
2250 | ParsedType &CastTy, |
2251 | SourceRange &CastRange) { |
2252 | |
2253 | assert(OpTok.isOneOf(tok::kw_typeof, tok::kw_sizeof, tok::kw___alignof,((void)0) |
2254 | tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step,((void)0) |
2255 | tok::kw___builtin_omp_required_simd_align) &&((void)0) |
2256 | "Not a typeof/sizeof/alignof/vec_step expression!")((void)0); |
2257 | |
2258 | ExprResult Operand; |
2259 | |
2260 | // If the operand doesn't start with an '(', it must be an expression. |
2261 | if (Tok.isNot(tok::l_paren)) { |
2262 | // If construct allows a form without parenthesis, user may forget to put |
2263 | // pathenthesis around type name. |
2264 | if (OpTok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof, |
2265 | tok::kw__Alignof)) { |
2266 | if (isTypeIdUnambiguously()) { |
2267 | DeclSpec DS(AttrFactory); |
2268 | ParseSpecifierQualifierList(DS); |
2269 | Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName); |
2270 | ParseDeclarator(DeclaratorInfo); |
2271 | |
2272 | SourceLocation LParenLoc = PP.getLocForEndOfToken(OpTok.getLocation()); |
2273 | SourceLocation RParenLoc = PP.getLocForEndOfToken(PrevTokLocation); |
2274 | if (LParenLoc.isInvalid() || RParenLoc.isInvalid()) { |
2275 | Diag(OpTok.getLocation(), |
2276 | diag::err_expected_parentheses_around_typename) |
2277 | << OpTok.getName(); |
2278 | } else { |
2279 | Diag(LParenLoc, diag::err_expected_parentheses_around_typename) |
2280 | << OpTok.getName() << FixItHint::CreateInsertion(LParenLoc, "(") |
2281 | << FixItHint::CreateInsertion(RParenLoc, ")"); |
2282 | } |
2283 | isCastExpr = true; |
2284 | return ExprEmpty(); |
2285 | } |
2286 | } |
2287 | |
2288 | isCastExpr = false; |
2289 | if (OpTok.is(tok::kw_typeof) && !getLangOpts().CPlusPlus) { |
2290 | Diag(Tok, diag::err_expected_after) << OpTok.getIdentifierInfo() |
2291 | << tok::l_paren; |
2292 | return ExprError(); |
2293 | } |
2294 | |
2295 | Operand = ParseCastExpression(UnaryExprOnly); |
2296 | } else { |
2297 | // If it starts with a '(', we know that it is either a parenthesized |
2298 | // type-name, or it is a unary-expression that starts with a compound |
2299 | // literal, or starts with a primary-expression that is a parenthesized |
2300 | // expression. |
2301 | ParenParseOption ExprType = CastExpr; |
2302 | SourceLocation LParenLoc = Tok.getLocation(), RParenLoc; |
2303 | |
2304 | Operand = ParseParenExpression(ExprType, true/*stopIfCastExpr*/, |
2305 | false, CastTy, RParenLoc); |
2306 | CastRange = SourceRange(LParenLoc, RParenLoc); |
2307 | |
2308 | // If ParseParenExpression parsed a '(typename)' sequence only, then this is |
2309 | // a type. |
2310 | if (ExprType == CastExpr) { |
2311 | isCastExpr = true; |
2312 | return ExprEmpty(); |
2313 | } |
2314 | |
2315 | if (getLangOpts().CPlusPlus || OpTok.isNot(tok::kw_typeof)) { |
2316 | // GNU typeof in C requires the expression to be parenthesized. Not so for |
2317 | // sizeof/alignof or in C++. Therefore, the parenthesized expression is |
2318 | // the start of a unary-expression, but doesn't include any postfix |
2319 | // pieces. Parse these now if present. |
2320 | if (!Operand.isInvalid()) |
2321 | Operand = ParsePostfixExpressionSuffix(Operand.get()); |
2322 | } |
2323 | } |
2324 | |
2325 | // If we get here, the operand to the typeof/sizeof/alignof was an expression. |
2326 | isCastExpr = false; |
2327 | return Operand; |
2328 | } |
2329 | |
2330 | /// Parse a __builtin_sycl_unique_stable_name expression. Accepts a type-id as |
2331 | /// a parameter. |
2332 | ExprResult Parser::ParseSYCLUniqueStableNameExpression() { |
2333 | assert(Tok.is(tok::kw___builtin_sycl_unique_stable_name) &&((void)0) |
2334 | "Not __bulitin_sycl_unique_stable_name")((void)0); |
2335 | |
2336 | SourceLocation OpLoc = ConsumeToken(); |
2337 | BalancedDelimiterTracker T(*this, tok::l_paren); |
2338 | |
2339 | // __builtin_sycl_unique_stable_name expressions are always parenthesized. |
2340 | if (T.expectAndConsume(diag::err_expected_lparen_after, |
2341 | "__builtin_sycl_unique_stable_name")) |
2342 | return ExprError(); |
2343 | |
2344 | TypeResult Ty = ParseTypeName(); |
2345 | |
2346 | if (Ty.isInvalid()) { |
2347 | T.skipToEnd(); |
2348 | return ExprError(); |
2349 | } |
2350 | |
2351 | if (T.consumeClose()) |
2352 | return ExprError(); |
2353 | |
2354 | return Actions.ActOnSYCLUniqueStableNameExpr(OpLoc, T.getOpenLocation(), |
2355 | T.getCloseLocation(), Ty.get()); |
2356 | } |
2357 | |
2358 | /// Parse a sizeof or alignof expression. |
2359 | /// |
2360 | /// \verbatim |
2361 | /// unary-expression: [C99 6.5.3] |
2362 | /// 'sizeof' unary-expression |
2363 | /// 'sizeof' '(' type-name ')' |
2364 | /// [C++11] 'sizeof' '...' '(' identifier ')' |
2365 | /// [GNU] '__alignof' unary-expression |
2366 | /// [GNU] '__alignof' '(' type-name ')' |
2367 | /// [C11] '_Alignof' '(' type-name ')' |
2368 | /// [C++11] 'alignof' '(' type-id ')' |
2369 | /// \endverbatim |
2370 | ExprResult Parser::ParseUnaryExprOrTypeTraitExpression() { |
2371 | assert(Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof,((void)0) |
2372 | tok::kw__Alignof, tok::kw_vec_step,((void)0) |
2373 | tok::kw___builtin_omp_required_simd_align) &&((void)0) |
2374 | "Not a sizeof/alignof/vec_step expression!")((void)0); |
2375 | Token OpTok = Tok; |
2376 | ConsumeToken(); |
2377 | |
2378 | // [C++11] 'sizeof' '...' '(' identifier ')' |
2379 | if (Tok.is(tok::ellipsis) && OpTok.is(tok::kw_sizeof)) { |
2380 | SourceLocation EllipsisLoc = ConsumeToken(); |
2381 | SourceLocation LParenLoc, RParenLoc; |
2382 | IdentifierInfo *Name = nullptr; |
2383 | SourceLocation NameLoc; |
2384 | if (Tok.is(tok::l_paren)) { |
2385 | BalancedDelimiterTracker T(*this, tok::l_paren); |
2386 | T.consumeOpen(); |
2387 | LParenLoc = T.getOpenLocation(); |
2388 | if (Tok.is(tok::identifier)) { |
2389 | Name = Tok.getIdentifierInfo(); |
2390 | NameLoc = ConsumeToken(); |
2391 | T.consumeClose(); |
2392 | RParenLoc = T.getCloseLocation(); |
2393 | if (RParenLoc.isInvalid()) |
2394 | RParenLoc = PP.getLocForEndOfToken(NameLoc); |
2395 | } else { |
2396 | Diag(Tok, diag::err_expected_parameter_pack); |
2397 | SkipUntil(tok::r_paren, StopAtSemi); |
2398 | } |
2399 | } else if (Tok.is(tok::identifier)) { |
2400 | Name = Tok.getIdentifierInfo(); |
2401 | NameLoc = ConsumeToken(); |
2402 | LParenLoc = PP.getLocForEndOfToken(EllipsisLoc); |
2403 | RParenLoc = PP.getLocForEndOfToken(NameLoc); |
2404 | Diag(LParenLoc, diag::err_paren_sizeof_parameter_pack) |
2405 | << Name |
2406 | << FixItHint::CreateInsertion(LParenLoc, "(") |
2407 | << FixItHint::CreateInsertion(RParenLoc, ")"); |
2408 | } else { |
2409 | Diag(Tok, diag::err_sizeof_parameter_pack); |
2410 | } |
2411 | |
2412 | if (!Name) |
2413 | return ExprError(); |
2414 | |
2415 | EnterExpressionEvaluationContext Unevaluated( |
2416 | Actions, Sema::ExpressionEvaluationContext::Unevaluated, |
2417 | Sema::ReuseLambdaContextDecl); |
2418 | |
2419 | return Actions.ActOnSizeofParameterPackExpr(getCurScope(), |
2420 | OpTok.getLocation(), |
2421 | *Name, NameLoc, |
2422 | RParenLoc); |
2423 | } |
2424 | |
2425 | if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof)) |
2426 | Diag(OpTok, diag::warn_cxx98_compat_alignof); |
2427 | |
2428 | EnterExpressionEvaluationContext Unevaluated( |
2429 | Actions, Sema::ExpressionEvaluationContext::Unevaluated, |
2430 | Sema::ReuseLambdaContextDecl); |
2431 | |
2432 | bool isCastExpr; |
2433 | ParsedType CastTy; |
2434 | SourceRange CastRange; |
2435 | ExprResult Operand = ParseExprAfterUnaryExprOrTypeTrait(OpTok, |
2436 | isCastExpr, |
2437 | CastTy, |
2438 | CastRange); |
2439 | |
2440 | UnaryExprOrTypeTrait ExprKind = UETT_SizeOf; |
2441 | if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof)) |
2442 | ExprKind = UETT_AlignOf; |
2443 | else if (OpTok.is(tok::kw___alignof)) |
2444 | ExprKind = UETT_PreferredAlignOf; |
2445 | else if (OpTok.is(tok::kw_vec_step)) |
2446 | ExprKind = UETT_VecStep; |
2447 | else if (OpTok.is(tok::kw___builtin_omp_required_simd_align)) |
2448 | ExprKind = UETT_OpenMPRequiredSimdAlign; |
2449 | |
2450 | if (isCastExpr) |
2451 | return Actions.ActOnUnaryExprOrTypeTraitExpr(OpTok.getLocation(), |
2452 | ExprKind, |
2453 | /*IsType=*/true, |
2454 | CastTy.getAsOpaquePtr(), |
2455 | CastRange); |
2456 | |
2457 | if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof)) |
2458 | Diag(OpTok, diag::ext_alignof_expr) << OpTok.getIdentifierInfo(); |
2459 | |
2460 | // If we get here, the operand to the sizeof/alignof was an expression. |
2461 | if (!Operand.isInvalid()) |
2462 | Operand = Actions.ActOnUnaryExprOrTypeTraitExpr(OpTok.getLocation(), |
2463 | ExprKind, |
2464 | /*IsType=*/false, |
2465 | Operand.get(), |
2466 | CastRange); |
2467 | return Operand; |
2468 | } |
2469 | |
2470 | /// ParseBuiltinPrimaryExpression |
2471 | /// |
2472 | /// \verbatim |
2473 | /// primary-expression: [C99 6.5.1] |
2474 | /// [GNU] '__builtin_va_arg' '(' assignment-expression ',' type-name ')' |
2475 | /// [GNU] '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')' |
2476 | /// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ',' |
2477 | /// assign-expr ')' |
2478 | /// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')' |
2479 | /// [GNU] '__builtin_FILE' '(' ')' |
2480 | /// [GNU] '__builtin_FUNCTION' '(' ')' |
2481 | /// [GNU] '__builtin_LINE' '(' ')' |
2482 | /// [CLANG] '__builtin_COLUMN' '(' ')' |
2483 | /// [OCL] '__builtin_astype' '(' assignment-expression ',' type-name ')' |
2484 | /// |
2485 | /// [GNU] offsetof-member-designator: |
2486 | /// [GNU] identifier |
2487 | /// [GNU] offsetof-member-designator '.' identifier |
2488 | /// [GNU] offsetof-member-designator '[' expression ']' |
2489 | /// \endverbatim |
2490 | ExprResult Parser::ParseBuiltinPrimaryExpression() { |
2491 | ExprResult Res; |
2492 | const IdentifierInfo *BuiltinII = Tok.getIdentifierInfo(); |
2493 | |
2494 | tok::TokenKind T = Tok.getKind(); |
2495 | SourceLocation StartLoc = ConsumeToken(); // Eat the builtin identifier. |
2496 | |
2497 | // All of these start with an open paren. |
2498 | if (Tok.isNot(tok::l_paren)) |
2499 | return ExprError(Diag(Tok, diag::err_expected_after) << BuiltinII |
2500 | << tok::l_paren); |
2501 | |
2502 | BalancedDelimiterTracker PT(*this, tok::l_paren); |
2503 | PT.consumeOpen(); |
2504 | |
2505 | // TODO: Build AST. |
2506 | |
2507 | switch (T) { |
2508 | default: llvm_unreachable("Not a builtin primary expression!")__builtin_unreachable(); |
2509 | case tok::kw___builtin_va_arg: { |
2510 | ExprResult Expr(ParseAssignmentExpression()); |
2511 | |
2512 | if (ExpectAndConsume(tok::comma)) { |
2513 | SkipUntil(tok::r_paren, StopAtSemi); |
2514 | Expr = ExprError(); |
2515 | } |
2516 | |
2517 | TypeResult Ty = ParseTypeName(); |
2518 | |
2519 | if (Tok.isNot(tok::r_paren)) { |
2520 | Diag(Tok, diag::err_expected) << tok::r_paren; |
2521 | Expr = ExprError(); |
2522 | } |
2523 | |
2524 | if (Expr.isInvalid() || Ty.isInvalid()) |
2525 | Res = ExprError(); |
2526 | else |
2527 | Res = Actions.ActOnVAArg(StartLoc, Expr.get(), Ty.get(), ConsumeParen()); |
2528 | break; |
2529 | } |
2530 | case tok::kw___builtin_offsetof: { |
2531 | SourceLocation TypeLoc = Tok.getLocation(); |
2532 | TypeResult Ty = ParseTypeName(); |
2533 | if (Ty.isInvalid()) { |
2534 | SkipUntil(tok::r_paren, StopAtSemi); |
2535 | return ExprError(); |
2536 | } |
2537 | |
2538 | if (ExpectAndConsume(tok::comma)) { |
2539 | SkipUntil(tok::r_paren, StopAtSemi); |
2540 | return ExprError(); |
2541 | } |
2542 | |
2543 | // We must have at least one identifier here. |
2544 | if (Tok.isNot(tok::identifier)) { |
2545 | Diag(Tok, diag::err_expected) << tok::identifier; |
2546 | SkipUntil(tok::r_paren, StopAtSemi); |
2547 | return ExprError(); |
2548 | } |
2549 | |
2550 | // Keep track of the various subcomponents we see. |
2551 | SmallVector<Sema::OffsetOfComponent, 4> Comps; |
2552 | |
2553 | Comps.push_back(Sema::OffsetOfComponent()); |
2554 | Comps.back().isBrackets = false; |
2555 | Comps.back().U.IdentInfo = Tok.getIdentifierInfo(); |
2556 | Comps.back().LocStart = Comps.back().LocEnd = ConsumeToken(); |
2557 | |
2558 | // FIXME: This loop leaks the index expressions on error. |
2559 | while (1) { |
2560 | if (Tok.is(tok::period)) { |
2561 | // offsetof-member-designator: offsetof-member-designator '.' identifier |
2562 | Comps.push_back(Sema::OffsetOfComponent()); |
2563 | Comps.back().isBrackets = false; |
2564 | Comps.back().LocStart = ConsumeToken(); |
2565 | |
2566 | if (Tok.isNot(tok::identifier)) { |
2567 | Diag(Tok, diag::err_expected) << tok::identifier; |
2568 | SkipUntil(tok::r_paren, StopAtSemi); |
2569 | return ExprError(); |
2570 | } |
2571 | Comps.back().U.IdentInfo = Tok.getIdentifierInfo(); |
2572 | Comps.back().LocEnd = ConsumeToken(); |
2573 | |
2574 | } else if (Tok.is(tok::l_square)) { |
2575 | if (CheckProhibitedCXX11Attribute()) |
2576 | return ExprError(); |
2577 | |
2578 | // offsetof-member-designator: offsetof-member-design '[' expression ']' |
2579 | Comps.push_back(Sema::OffsetOfComponent()); |
2580 | Comps.back().isBrackets = true; |
2581 | BalancedDelimiterTracker ST(*this, tok::l_square); |
2582 | ST.consumeOpen(); |
2583 | Comps.back().LocStart = ST.getOpenLocation(); |
2584 | Res = ParseExpression(); |
2585 | if (Res.isInvalid()) { |
2586 | SkipUntil(tok::r_paren, StopAtSemi); |
2587 | return Res; |
2588 | } |
2589 | Comps.back().U.E = Res.get(); |
2590 | |
2591 | ST.consumeClose(); |
2592 | Comps.back().LocEnd = ST.getCloseLocation(); |
2593 | } else { |
2594 | if (Tok.isNot(tok::r_paren)) { |
2595 | PT.consumeClose(); |
2596 | Res = ExprError(); |
2597 | } else if (Ty.isInvalid()) { |
2598 | Res = ExprError(); |
2599 | } else { |
2600 | PT.consumeClose(); |
2601 | Res = Actions.ActOnBuiltinOffsetOf(getCurScope(), StartLoc, TypeLoc, |
2602 | Ty.get(), Comps, |
2603 | PT.getCloseLocation()); |
2604 | } |
2605 | break; |
2606 | } |
2607 | } |
2608 | break; |
2609 | } |
2610 | case tok::kw___builtin_choose_expr: { |
2611 | ExprResult Cond(ParseAssignmentExpression()); |
2612 | if (Cond.isInvalid()) { |
2613 | SkipUntil(tok::r_paren, StopAtSemi); |
2614 | return Cond; |
2615 | } |
2616 | if (ExpectAndConsume(tok::comma)) { |
2617 | SkipUntil(tok::r_paren, StopAtSemi); |
2618 | return ExprError(); |
2619 | } |
2620 | |
2621 | ExprResult Expr1(ParseAssignmentExpression()); |
2622 | if (Expr1.isInvalid()) { |
2623 | SkipUntil(tok::r_paren, StopAtSemi); |
2624 | return Expr1; |
2625 | } |
2626 | if (ExpectAndConsume(tok::comma)) { |
2627 | SkipUntil(tok::r_paren, StopAtSemi); |
2628 | return ExprError(); |
2629 | } |
2630 | |
2631 | ExprResult Expr2(ParseAssignmentExpression()); |
2632 | if (Expr2.isInvalid()) { |
2633 | SkipUntil(tok::r_paren, StopAtSemi); |
2634 | return Expr2; |
2635 | } |
2636 | if (Tok.isNot(tok::r_paren)) { |
2637 | Diag(Tok, diag::err_expected) << tok::r_paren; |
2638 | return ExprError(); |
2639 | } |
2640 | Res = Actions.ActOnChooseExpr(StartLoc, Cond.get(), Expr1.get(), |
2641 | Expr2.get(), ConsumeParen()); |
2642 | break; |
2643 | } |
2644 | case tok::kw___builtin_astype: { |
2645 | // The first argument is an expression to be converted, followed by a comma. |
2646 | ExprResult Expr(ParseAssignmentExpression()); |
2647 | if (Expr.isInvalid()) { |
2648 | SkipUntil(tok::r_paren, StopAtSemi); |
2649 | return ExprError(); |
2650 | } |
2651 | |
2652 | if (ExpectAndConsume(tok::comma)) { |
2653 | SkipUntil(tok::r_paren, StopAtSemi); |
2654 | return ExprError(); |
2655 | } |
2656 | |
2657 | // Second argument is the type to bitcast to. |
2658 | TypeResult DestTy = ParseTypeName(); |
2659 | if (DestTy.isInvalid()) |
2660 | return ExprError(); |
2661 | |
2662 | // Attempt to consume the r-paren. |
2663 | if (Tok.isNot(tok::r_paren)) { |
2664 | Diag(Tok, diag::err_expected) << tok::r_paren; |
2665 | SkipUntil(tok::r_paren, StopAtSemi); |
2666 | return ExprError(); |
2667 | } |
2668 | |
2669 | Res = Actions.ActOnAsTypeExpr(Expr.get(), DestTy.get(), StartLoc, |
2670 | ConsumeParen()); |
2671 | break; |
2672 | } |
2673 | case tok::kw___builtin_convertvector: { |
2674 | // The first argument is an expression to be converted, followed by a comma. |
2675 | ExprResult Expr(ParseAssignmentExpression()); |
2676 | if (Expr.isInvalid()) { |
2677 | SkipUntil(tok::r_paren, StopAtSemi); |
2678 | return ExprError(); |
2679 | } |
2680 | |
2681 | if (ExpectAndConsume(tok::comma)) { |
2682 | SkipUntil(tok::r_paren, StopAtSemi); |
2683 | return ExprError(); |
2684 | } |
2685 | |
2686 | // Second argument is the type to bitcast to. |
2687 | TypeResult DestTy = ParseTypeName(); |
2688 | if (DestTy.isInvalid()) |
2689 | return ExprError(); |
2690 | |
2691 | // Attempt to consume the r-paren. |
2692 | if (Tok.isNot(tok::r_paren)) { |
2693 | Diag(Tok, diag::err_expected) << tok::r_paren; |
2694 | SkipUntil(tok::r_paren, StopAtSemi); |
2695 | return ExprError(); |
2696 | } |
2697 | |
2698 | Res = Actions.ActOnConvertVectorExpr(Expr.get(), DestTy.get(), StartLoc, |
2699 | ConsumeParen()); |
2700 | break; |
2701 | } |
2702 | case tok::kw___builtin_COLUMN: |
2703 | case tok::kw___builtin_FILE: |
2704 | case tok::kw___builtin_FUNCTION: |
2705 | case tok::kw___builtin_LINE: { |
2706 | // Attempt to consume the r-paren. |
2707 | if (Tok.isNot(tok::r_paren)) { |
2708 | Diag(Tok, diag::err_expected) << tok::r_paren; |
2709 | SkipUntil(tok::r_paren, StopAtSemi); |
2710 | return ExprError(); |
2711 | } |
2712 | SourceLocExpr::IdentKind Kind = [&] { |
2713 | switch (T) { |
2714 | case tok::kw___builtin_FILE: |
2715 | return SourceLocExpr::File; |
2716 | case tok::kw___builtin_FUNCTION: |
2717 | return SourceLocExpr::Function; |
2718 | case tok::kw___builtin_LINE: |
2719 | return SourceLocExpr::Line; |
2720 | case tok::kw___builtin_COLUMN: |
2721 | return SourceLocExpr::Column; |
2722 | default: |
2723 | llvm_unreachable("invalid keyword")__builtin_unreachable(); |
2724 | } |
2725 | }(); |
2726 | Res = Actions.ActOnSourceLocExpr(Kind, StartLoc, ConsumeParen()); |
2727 | break; |
2728 | } |
2729 | } |
2730 | |
2731 | if (Res.isInvalid()) |
2732 | return ExprError(); |
2733 | |
2734 | // These can be followed by postfix-expr pieces because they are |
2735 | // primary-expressions. |
2736 | return ParsePostfixExpressionSuffix(Res.get()); |
2737 | } |
2738 | |
2739 | bool Parser::tryParseOpenMPArrayShapingCastPart() { |
2740 | assert(Tok.is(tok::l_square) && "Expected open bracket")((void)0); |
2741 | bool ErrorFound = true; |
2742 | TentativeParsingAction TPA(*this); |
2743 | do { |
2744 | if (Tok.isNot(tok::l_square)) |
2745 | break; |
2746 | // Consume '[' |
2747 | ConsumeBracket(); |
2748 | // Skip inner expression. |
2749 | while (!SkipUntil(tok::r_square, tok::annot_pragma_openmp_end, |
2750 | StopAtSemi | StopBeforeMatch)) |
2751 | ; |
2752 | if (Tok.isNot(tok::r_square)) |
2753 | break; |
2754 | // Consume ']' |
2755 | ConsumeBracket(); |
2756 | // Found ')' - done. |
2757 | if (Tok.is(tok::r_paren)) { |
2758 | ErrorFound = false; |
2759 | break; |
2760 | } |
2761 | } while (Tok.isNot(tok::annot_pragma_openmp_end)); |
2762 | TPA.Revert(); |
2763 | return !ErrorFound; |
2764 | } |
2765 | |
2766 | /// ParseParenExpression - This parses the unit that starts with a '(' token, |
2767 | /// based on what is allowed by ExprType. The actual thing parsed is returned |
2768 | /// in ExprType. If stopIfCastExpr is true, it will only return the parsed type, |
2769 | /// not the parsed cast-expression. |
2770 | /// |
2771 | /// \verbatim |
2772 | /// primary-expression: [C99 6.5.1] |
2773 | /// '(' expression ')' |
2774 | /// [GNU] '(' compound-statement ')' (if !ParenExprOnly) |
2775 | /// postfix-expression: [C99 6.5.2] |
2776 | /// '(' type-name ')' '{' initializer-list '}' |
2777 | /// '(' type-name ')' '{' initializer-list ',' '}' |
2778 | /// cast-expression: [C99 6.5.4] |
2779 | /// '(' type-name ')' cast-expression |
2780 | /// [ARC] bridged-cast-expression |
2781 | /// [ARC] bridged-cast-expression: |
2782 | /// (__bridge type-name) cast-expression |
2783 | /// (__bridge_transfer type-name) cast-expression |
2784 | /// (__bridge_retained type-name) cast-expression |
2785 | /// fold-expression: [C++1z] |
2786 | /// '(' cast-expression fold-operator '...' ')' |
2787 | /// '(' '...' fold-operator cast-expression ')' |
2788 | /// '(' cast-expression fold-operator '...' |
2789 | /// fold-operator cast-expression ')' |
2790 | /// [OPENMP] Array shaping operation |
2791 | /// '(' '[' expression ']' { '[' expression ']' } cast-expression |
2792 | /// \endverbatim |
2793 | ExprResult |
2794 | Parser::ParseParenExpression(ParenParseOption &ExprType, bool stopIfCastExpr, |
2795 | bool isTypeCast, ParsedType &CastTy, |
2796 | SourceLocation &RParenLoc) { |
2797 | assert(Tok.is(tok::l_paren) && "Not a paren expr!")((void)0); |
2798 | ColonProtectionRAIIObject ColonProtection(*this, false); |
2799 | BalancedDelimiterTracker T(*this, tok::l_paren); |
2800 | if (T.consumeOpen()) |
2801 | return ExprError(); |
2802 | SourceLocation OpenLoc = T.getOpenLocation(); |
2803 | |
2804 | PreferredType.enterParenExpr(Tok.getLocation(), OpenLoc); |
2805 | |
2806 | ExprResult Result(true); |
2807 | bool isAmbiguousTypeId; |
2808 | CastTy = nullptr; |
2809 | |
2810 | if (Tok.is(tok::code_completion)) { |
2811 | cutOffParsing(); |
2812 | Actions.CodeCompleteExpression( |
2813 | getCurScope(), PreferredType.get(Tok.getLocation()), |
2814 | /*IsParenthesized=*/ExprType >= CompoundLiteral); |
2815 | return ExprError(); |
2816 | } |
2817 | |
2818 | // Diagnose use of bridge casts in non-arc mode. |
2819 | bool BridgeCast = (getLangOpts().ObjC && |
2820 | Tok.isOneOf(tok::kw___bridge, |
2821 | tok::kw___bridge_transfer, |
2822 | tok::kw___bridge_retained, |
2823 | tok::kw___bridge_retain)); |
2824 | if (BridgeCast && !getLangOpts().ObjCAutoRefCount) { |
2825 | if (!TryConsumeToken(tok::kw___bridge)) { |
2826 | StringRef BridgeCastName = Tok.getName(); |
2827 | SourceLocation BridgeKeywordLoc = ConsumeToken(); |
2828 | if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc)) |
2829 | Diag(BridgeKeywordLoc, diag::warn_arc_bridge_cast_nonarc) |
2830 | << BridgeCastName |
2831 | << FixItHint::CreateReplacement(BridgeKeywordLoc, ""); |
2832 | } |
2833 | BridgeCast = false; |
2834 | } |
2835 | |
2836 | // None of these cases should fall through with an invalid Result |
2837 | // unless they've already reported an error. |
2838 | if (ExprType >= CompoundStmt && Tok.is(tok::l_brace)) { |
2839 | Diag(Tok, diag::ext_gnu_statement_expr); |
2840 | |
2841 | checkCompoundToken(OpenLoc, tok::l_paren, CompoundToken::StmtExprBegin); |
2842 | |
2843 | if (!getCurScope()->getFnParent() && !getCurScope()->getBlockParent()) { |
2844 | Result = ExprError(Diag(OpenLoc, diag::err_stmtexpr_file_scope)); |
2845 | } else { |
2846 | // Find the nearest non-record decl context. Variables declared in a |
2847 | // statement expression behave as if they were declared in the enclosing |
2848 | // function, block, or other code construct. |
2849 | DeclContext *CodeDC = Actions.CurContext; |
2850 | while (CodeDC->isRecord() || isa<EnumDecl>(CodeDC)) { |
2851 | CodeDC = CodeDC->getParent(); |
2852 | assert(CodeDC && !CodeDC->isFileContext() &&((void)0) |
2853 | "statement expr not in code context")((void)0); |
2854 | } |
2855 | Sema::ContextRAII SavedContext(Actions, CodeDC, /*NewThisContext=*/false); |
2856 | |
2857 | Actions.ActOnStartStmtExpr(); |
2858 | |
2859 | StmtResult Stmt(ParseCompoundStatement(true)); |
2860 | ExprType = CompoundStmt; |
2861 | |
2862 | // If the substmt parsed correctly, build the AST node. |
2863 | if (!Stmt.isInvalid()) { |
2864 | Result = Actions.ActOnStmtExpr(getCurScope(), OpenLoc, Stmt.get(), |
2865 | Tok.getLocation()); |
2866 | } else { |
2867 | Actions.ActOnStmtExprError(); |
2868 | } |
2869 | } |
2870 | } else if (ExprType >= CompoundLiteral && BridgeCast) { |
2871 | tok::TokenKind tokenKind = Tok.getKind(); |
2872 | SourceLocation BridgeKeywordLoc = ConsumeToken(); |
2873 | |
2874 | // Parse an Objective-C ARC ownership cast expression. |
2875 | ObjCBridgeCastKind Kind; |
2876 | if (tokenKind == tok::kw___bridge) |
2877 | Kind = OBC_Bridge; |
2878 | else if (tokenKind == tok::kw___bridge_transfer) |
2879 | Kind = OBC_BridgeTransfer; |
2880 | else if (tokenKind == tok::kw___bridge_retained) |
2881 | Kind = OBC_BridgeRetained; |
2882 | else { |
2883 | // As a hopefully temporary workaround, allow __bridge_retain as |
2884 | // a synonym for __bridge_retained, but only in system headers. |
2885 | assert(tokenKind == tok::kw___bridge_retain)((void)0); |
2886 | Kind = OBC_BridgeRetained; |
2887 | if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc)) |
2888 | Diag(BridgeKeywordLoc, diag::err_arc_bridge_retain) |
2889 | << FixItHint::CreateReplacement(BridgeKeywordLoc, |
2890 | "__bridge_retained"); |
2891 | } |
2892 | |
2893 | TypeResult Ty = ParseTypeName(); |
2894 | T.consumeClose(); |
2895 | ColonProtection.restore(); |
2896 | RParenLoc = T.getCloseLocation(); |
2897 | |
2898 | PreferredType.enterTypeCast(Tok.getLocation(), Ty.get().get()); |
2899 | ExprResult SubExpr = ParseCastExpression(AnyCastExpr); |
2900 | |
2901 | if (Ty.isInvalid() || SubExpr.isInvalid()) |
2902 | return ExprError(); |
2903 | |
2904 | return Actions.ActOnObjCBridgedCast(getCurScope(), OpenLoc, Kind, |
2905 | BridgeKeywordLoc, Ty.get(), |
2906 | RParenLoc, SubExpr.get()); |
2907 | } else if (ExprType >= CompoundLiteral && |
2908 | isTypeIdInParens(isAmbiguousTypeId)) { |
2909 | |
2910 | // Otherwise, this is a compound literal expression or cast expression. |
2911 | |
2912 | // In C++, if the type-id is ambiguous we disambiguate based on context. |
2913 | // If stopIfCastExpr is true the context is a typeof/sizeof/alignof |
2914 | // in which case we should treat it as type-id. |
2915 | // if stopIfCastExpr is false, we need to determine the context past the |
2916 | // parens, so we defer to ParseCXXAmbiguousParenExpression for that. |
2917 | if (isAmbiguousTypeId && !stopIfCastExpr) { |
2918 | ExprResult res = ParseCXXAmbiguousParenExpression(ExprType, CastTy, T, |
2919 | ColonProtection); |
2920 | RParenLoc = T.getCloseLocation(); |
2921 | return res; |
2922 | } |
2923 | |
2924 | // Parse the type declarator. |
2925 | DeclSpec DS(AttrFactory); |
2926 | ParseSpecifierQualifierList(DS); |
2927 | Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName); |
2928 | ParseDeclarator(DeclaratorInfo); |
2929 | |
2930 | // If our type is followed by an identifier and either ':' or ']', then |
2931 | // this is probably an Objective-C message send where the leading '[' is |
2932 | // missing. Recover as if that were the case. |
2933 | if (!DeclaratorInfo.isInvalidType() && Tok.is(tok::identifier) && |
2934 | !InMessageExpression && getLangOpts().ObjC && |
2935 | (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) { |
2936 | TypeResult Ty; |
2937 | { |
2938 | InMessageExpressionRAIIObject InMessage(*this, false); |
2939 | Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
2940 | } |
2941 | Result = ParseObjCMessageExpressionBody(SourceLocation(), |
2942 | SourceLocation(), |
2943 | Ty.get(), nullptr); |
2944 | } else { |
2945 | // Match the ')'. |
2946 | T.consumeClose(); |
2947 | ColonProtection.restore(); |
2948 | RParenLoc = T.getCloseLocation(); |
2949 | if (Tok.is(tok::l_brace)) { |
2950 | ExprType = CompoundLiteral; |
2951 | TypeResult Ty; |
2952 | { |
2953 | InMessageExpressionRAIIObject InMessage(*this, false); |
2954 | Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
2955 | } |
2956 | return ParseCompoundLiteralExpression(Ty.get(), OpenLoc, RParenLoc); |
2957 | } |
2958 | |
2959 | if (Tok.is(tok::l_paren)) { |
2960 | // This could be OpenCL vector Literals |
2961 | if (getLangOpts().OpenCL) |
2962 | { |
2963 | TypeResult Ty; |
2964 | { |
2965 | InMessageExpressionRAIIObject InMessage(*this, false); |
2966 | Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
2967 | } |
2968 | if(Ty.isInvalid()) |
2969 | { |
2970 | return ExprError(); |
2971 | } |
2972 | QualType QT = Ty.get().get().getCanonicalType(); |
2973 | if (QT->isVectorType()) |
2974 | { |
2975 | // We parsed '(' vector-type-name ')' followed by '(' |
2976 | |
2977 | // Parse the cast-expression that follows it next. |
2978 | // isVectorLiteral = true will make sure we don't parse any |
2979 | // Postfix expression yet |
2980 | Result = ParseCastExpression(/*isUnaryExpression=*/AnyCastExpr, |
2981 | /*isAddressOfOperand=*/false, |
2982 | /*isTypeCast=*/IsTypeCast, |
2983 | /*isVectorLiteral=*/true); |
2984 | |
2985 | if (!Result.isInvalid()) { |
2986 | Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc, |
2987 | DeclaratorInfo, CastTy, |
2988 | RParenLoc, Result.get()); |
2989 | } |
2990 | |
2991 | // After we performed the cast we can check for postfix-expr pieces. |
2992 | if (!Result.isInvalid()) { |
2993 | Result = ParsePostfixExpressionSuffix(Result); |
2994 | } |
2995 | |
2996 | return Result; |
2997 | } |
2998 | } |
2999 | } |
3000 | |
3001 | if (ExprType == CastExpr) { |
3002 | // We parsed '(' type-name ')' and the thing after it wasn't a '{'. |
3003 | |
3004 | if (DeclaratorInfo.isInvalidType()) |
3005 | return ExprError(); |
3006 | |
3007 | // Note that this doesn't parse the subsequent cast-expression, it just |
3008 | // returns the parsed type to the callee. |
3009 | if (stopIfCastExpr) { |
3010 | TypeResult Ty; |
3011 | { |
3012 | InMessageExpressionRAIIObject InMessage(*this, false); |
3013 | Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
3014 | } |
3015 | CastTy = Ty.get(); |
3016 | return ExprResult(); |
3017 | } |
3018 | |
3019 | // Reject the cast of super idiom in ObjC. |
3020 | if (Tok.is(tok::identifier) && getLangOpts().ObjC && |
3021 | Tok.getIdentifierInfo() == Ident_super && |
3022 | getCurScope()->isInObjcMethodScope() && |
3023 | GetLookAheadToken(1).isNot(tok::period)) { |
3024 | Diag(Tok.getLocation(), diag::err_illegal_super_cast) |
3025 | << SourceRange(OpenLoc, RParenLoc); |
3026 | return ExprError(); |
3027 | } |
3028 | |
3029 | PreferredType.enterTypeCast(Tok.getLocation(), CastTy.get()); |
3030 | // Parse the cast-expression that follows it next. |
3031 | // TODO: For cast expression with CastTy. |
3032 | Result = ParseCastExpression(/*isUnaryExpression=*/AnyCastExpr, |
3033 | /*isAddressOfOperand=*/false, |
3034 | /*isTypeCast=*/IsTypeCast); |
3035 | if (!Result.isInvalid()) { |
3036 | Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc, |
3037 | DeclaratorInfo, CastTy, |
3038 | RParenLoc, Result.get()); |
3039 | } |
3040 | return Result; |
3041 | } |
3042 | |
3043 | Diag(Tok, diag::err_expected_lbrace_in_compound_literal); |
3044 | return ExprError(); |
3045 | } |
3046 | } else if (ExprType >= FoldExpr && Tok.is(tok::ellipsis) && |
3047 | isFoldOperator(NextToken().getKind())) { |
3048 | ExprType = FoldExpr; |
3049 | return ParseFoldExpression(ExprResult(), T); |
3050 | } else if (isTypeCast) { |
3051 | // Parse the expression-list. |
3052 | InMessageExpressionRAIIObject InMessage(*this, false); |
3053 | |
3054 | ExprVector ArgExprs; |
3055 | CommaLocsTy CommaLocs; |
3056 | |
3057 | if (!ParseSimpleExpressionList(ArgExprs, CommaLocs)) { |
3058 | // FIXME: If we ever support comma expressions as operands to |
3059 | // fold-expressions, we'll need to allow multiple ArgExprs here. |
3060 | if (ExprType >= FoldExpr && ArgExprs.size() == 1 && |
3061 | isFoldOperator(Tok.getKind()) && NextToken().is(tok::ellipsis)) { |
3062 | ExprType = FoldExpr; |
3063 | return ParseFoldExpression(ArgExprs[0], T); |
3064 | } |
3065 | |
3066 | ExprType = SimpleExpr; |
3067 | Result = Actions.ActOnParenListExpr(OpenLoc, Tok.getLocation(), |
3068 | ArgExprs); |
3069 | } |
3070 | } else if (getLangOpts().OpenMP >= 50 && OpenMPDirectiveParsing && |
3071 | ExprType == CastExpr && Tok.is(tok::l_square) && |
3072 | tryParseOpenMPArrayShapingCastPart()) { |
3073 | bool ErrorFound = false; |
3074 | SmallVector<Expr *, 4> OMPDimensions; |
3075 | SmallVector<SourceRange, 4> OMPBracketsRanges; |
3076 | do { |
3077 | BalancedDelimiterTracker TS(*this, tok::l_square); |
3078 | TS.consumeOpen(); |
3079 | ExprResult NumElements = |
3080 | Actions.CorrectDelayedTyposInExpr(ParseExpression()); |
3081 | if (!NumElements.isUsable()) { |
3082 | ErrorFound = true; |
3083 | while (!SkipUntil(tok::r_square, tok::r_paren, |
3084 | StopAtSemi | StopBeforeMatch)) |
3085 | ; |
3086 | } |
3087 | TS.consumeClose(); |
3088 | OMPDimensions.push_back(NumElements.get()); |
3089 | OMPBracketsRanges.push_back(TS.getRange()); |
3090 | } while (Tok.isNot(tok::r_paren)); |
3091 | // Match the ')'. |
3092 | T.consumeClose(); |
3093 | RParenLoc = T.getCloseLocation(); |
3094 | Result = Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression()); |
3095 | if (ErrorFound) { |
3096 | Result = ExprError(); |
3097 | } else if (!Result.isInvalid()) { |
3098 | Result = Actions.ActOnOMPArrayShapingExpr( |
3099 | Result.get(), OpenLoc, RParenLoc, OMPDimensions, OMPBracketsRanges); |
3100 | } |
3101 | return Result; |
3102 | } else { |
3103 | InMessageExpressionRAIIObject InMessage(*this, false); |
3104 | |
3105 | Result = ParseExpression(MaybeTypeCast); |
3106 | if (!getLangOpts().CPlusPlus && MaybeTypeCast && Result.isUsable()) { |
3107 | // Correct typos in non-C++ code earlier so that implicit-cast-like |
3108 | // expressions are parsed correctly. |
3109 | Result = Actions.CorrectDelayedTyposInExpr(Result); |
3110 | } |
3111 | |
3112 | if (ExprType >= FoldExpr && isFoldOperator(Tok.getKind()) && |
3113 | NextToken().is(tok::ellipsis)) { |
3114 | ExprType = FoldExpr; |
3115 | return ParseFoldExpression(Result, T); |
3116 | } |
3117 | ExprType = SimpleExpr; |
3118 | |
3119 | // Don't build a paren expression unless we actually match a ')'. |
3120 | if (!Result.isInvalid() && Tok.is(tok::r_paren)) |
3121 | Result = |
3122 | Actions.ActOnParenExpr(OpenLoc, Tok.getLocation(), Result.get()); |
3123 | } |
3124 | |
3125 | // Match the ')'. |
3126 | if (Result.isInvalid()) { |
3127 | SkipUntil(tok::r_paren, StopAtSemi); |
3128 | return ExprError(); |
3129 | } |
3130 | |
3131 | T.consumeClose(); |
3132 | RParenLoc = T.getCloseLocation(); |
3133 | return Result; |
3134 | } |
3135 | |
3136 | /// ParseCompoundLiteralExpression - We have parsed the parenthesized type-name |
3137 | /// and we are at the left brace. |
3138 | /// |
3139 | /// \verbatim |
3140 | /// postfix-expression: [C99 6.5.2] |
3141 | /// '(' type-name ')' '{' initializer-list '}' |
3142 | /// '(' type-name ')' '{' initializer-list ',' '}' |
3143 | /// \endverbatim |
3144 | ExprResult |
3145 | Parser::ParseCompoundLiteralExpression(ParsedType Ty, |
3146 | SourceLocation LParenLoc, |
3147 | SourceLocation RParenLoc) { |
3148 | assert(Tok.is(tok::l_brace) && "Not a compound literal!")((void)0); |
3149 | if (!getLangOpts().C99) // Compound literals don't exist in C90. |
3150 | Diag(LParenLoc, diag::ext_c99_compound_literal); |
3151 | PreferredType.enterTypeCast(Tok.getLocation(), Ty.get()); |
3152 | ExprResult Result = ParseInitializer(); |
3153 | if (!Result.isInvalid() && Ty) |
3154 | return Actions.ActOnCompoundLiteral(LParenLoc, Ty, RParenLoc, Result.get()); |
3155 | return Result; |
3156 | } |
3157 | |
3158 | /// ParseStringLiteralExpression - This handles the various token types that |
3159 | /// form string literals, and also handles string concatenation [C99 5.1.1.2, |
3160 | /// translation phase #6]. |
3161 | /// |
3162 | /// \verbatim |
3163 | /// primary-expression: [C99 6.5.1] |
3164 | /// string-literal |
3165 | /// \verbatim |
3166 | ExprResult Parser::ParseStringLiteralExpression(bool AllowUserDefinedLiteral) { |
3167 | assert(isTokenStringLiteral() && "Not a string literal!")((void)0); |
3168 | |
3169 | // String concat. Note that keywords like __func__ and __FUNCTION__ are not |
3170 | // considered to be strings for concatenation purposes. |
3171 | SmallVector<Token, 4> StringToks; |
3172 | |
3173 | do { |
3174 | StringToks.push_back(Tok); |
3175 | ConsumeStringToken(); |
3176 | } while (isTokenStringLiteral()); |
3177 | |
3178 | // Pass the set of string tokens, ready for concatenation, to the actions. |
3179 | return Actions.ActOnStringLiteral(StringToks, |
3180 | AllowUserDefinedLiteral ? getCurScope() |
3181 | : nullptr); |
3182 | } |
3183 | |
3184 | /// ParseGenericSelectionExpression - Parse a C11 generic-selection |
3185 | /// [C11 6.5.1.1]. |
3186 | /// |
3187 | /// \verbatim |
3188 | /// generic-selection: |
3189 | /// _Generic ( assignment-expression , generic-assoc-list ) |
3190 | /// generic-assoc-list: |
3191 | /// generic-association |
3192 | /// generic-assoc-list , generic-association |
3193 | /// generic-association: |
3194 | /// type-name : assignment-expression |
3195 | /// default : assignment-expression |
3196 | /// \endverbatim |
3197 | ExprResult Parser::ParseGenericSelectionExpression() { |
3198 | assert(Tok.is(tok::kw__Generic) && "_Generic keyword expected")((void)0); |
3199 | if (!getLangOpts().C11) |
3200 | Diag(Tok, diag::ext_c11_feature) << Tok.getName(); |
3201 | |
3202 | SourceLocation KeyLoc = ConsumeToken(); |
3203 | BalancedDelimiterTracker T(*this, tok::l_paren); |
3204 | if (T.expectAndConsume()) |
3205 | return ExprError(); |
3206 | |
3207 | ExprResult ControllingExpr; |
3208 | { |
3209 | // C11 6.5.1.1p3 "The controlling expression of a generic selection is |
3210 | // not evaluated." |
3211 | EnterExpressionEvaluationContext Unevaluated( |
3212 | Actions, Sema::ExpressionEvaluationContext::Unevaluated); |
3213 | ControllingExpr = |
3214 | Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression()); |
3215 | if (ControllingExpr.isInvalid()) { |
3216 | SkipUntil(tok::r_paren, StopAtSemi); |
3217 | return ExprError(); |
3218 | } |
3219 | } |
3220 | |
3221 | if (ExpectAndConsume(tok::comma)) { |
3222 | SkipUntil(tok::r_paren, StopAtSemi); |
3223 | return ExprError(); |
3224 | } |
3225 | |
3226 | SourceLocation DefaultLoc; |
3227 | TypeVector Types; |
3228 | ExprVector Exprs; |
3229 | do { |
3230 | ParsedType Ty; |
3231 | if (Tok.is(tok::kw_default)) { |
3232 | // C11 6.5.1.1p2 "A generic selection shall have no more than one default |
3233 | // generic association." |
3234 | if (!DefaultLoc.isInvalid()) { |
3235 | Diag(Tok, diag::err_duplicate_default_assoc); |
3236 | Diag(DefaultLoc, diag::note_previous_default_assoc); |
3237 | SkipUntil(tok::r_paren, StopAtSemi); |
3238 | return ExprError(); |
3239 | } |
3240 | DefaultLoc = ConsumeToken(); |
3241 | Ty = nullptr; |
3242 | } else { |
3243 | ColonProtectionRAIIObject X(*this); |
3244 | TypeResult TR = ParseTypeName(); |
3245 | if (TR.isInvalid()) { |
3246 | SkipUntil(tok::r_paren, StopAtSemi); |
3247 | return ExprError(); |
3248 | } |
3249 | Ty = TR.get(); |
3250 | } |
3251 | Types.push_back(Ty); |
3252 | |
3253 | if (ExpectAndConsume(tok::colon)) { |
3254 | SkipUntil(tok::r_paren, StopAtSemi); |
3255 | return ExprError(); |
3256 | } |
3257 | |
3258 | // FIXME: These expressions should be parsed in a potentially potentially |
3259 | // evaluated context. |
3260 | ExprResult ER( |
3261 | Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression())); |
3262 | if (ER.isInvalid()) { |
3263 | SkipUntil(tok::r_paren, StopAtSemi); |
3264 | return ExprError(); |
3265 | } |
3266 | Exprs.push_back(ER.get()); |
3267 | } while (TryConsumeToken(tok::comma)); |
3268 | |
3269 | T.consumeClose(); |
3270 | if (T.getCloseLocation().isInvalid()) |
3271 | return ExprError(); |
3272 | |
3273 | return Actions.ActOnGenericSelectionExpr(KeyLoc, DefaultLoc, |
3274 | T.getCloseLocation(), |
3275 | ControllingExpr.get(), |
3276 | Types, Exprs); |
3277 | } |
3278 | |
3279 | /// Parse A C++1z fold-expression after the opening paren and optional |
3280 | /// left-hand-side expression. |
3281 | /// |
3282 | /// \verbatim |
3283 | /// fold-expression: |
3284 | /// ( cast-expression fold-operator ... ) |
3285 | /// ( ... fold-operator cast-expression ) |
3286 | /// ( cast-expression fold-operator ... fold-operator cast-expression ) |
3287 | ExprResult Parser::ParseFoldExpression(ExprResult LHS, |
3288 | BalancedDelimiterTracker &T) { |
3289 | if (LHS.isInvalid()) { |
3290 | T.skipToEnd(); |
3291 | return true; |
3292 | } |
3293 | |
3294 | tok::TokenKind Kind = tok::unknown; |
3295 | SourceLocation FirstOpLoc; |
3296 | if (LHS.isUsable()) { |
3297 | Kind = Tok.getKind(); |
3298 | assert(isFoldOperator(Kind) && "missing fold-operator")((void)0); |
3299 | FirstOpLoc = ConsumeToken(); |
3300 | } |
3301 | |
3302 | assert(Tok.is(tok::ellipsis) && "not a fold-expression")((void)0); |
3303 | SourceLocation EllipsisLoc = ConsumeToken(); |
3304 | |
3305 | ExprResult RHS; |
3306 | if (Tok.isNot(tok::r_paren)) { |
3307 | if (!isFoldOperator(Tok.getKind())) |
3308 | return Diag(Tok.getLocation(), diag::err_expected_fold_operator); |
3309 | |
3310 | if (Kind != tok::unknown && Tok.getKind() != Kind) |
3311 | Diag(Tok.getLocation(), diag::err_fold_operator_mismatch) |
3312 | << SourceRange(FirstOpLoc); |
3313 | Kind = Tok.getKind(); |
3314 | ConsumeToken(); |
3315 | |
3316 | RHS = ParseExpression(); |
3317 | if (RHS.isInvalid()) { |
3318 | T.skipToEnd(); |
3319 | return true; |
3320 | } |
3321 | } |
3322 | |
3323 | Diag(EllipsisLoc, getLangOpts().CPlusPlus17 |
3324 | ? diag::warn_cxx14_compat_fold_expression |
3325 | : diag::ext_fold_expression); |
3326 | |
3327 | T.consumeClose(); |
3328 | return Actions.ActOnCXXFoldExpr(getCurScope(), T.getOpenLocation(), LHS.get(), |
3329 | Kind, EllipsisLoc, RHS.get(), |
3330 | T.getCloseLocation()); |
3331 | } |
3332 | |
3333 | /// ParseExpressionList - Used for C/C++ (argument-)expression-list. |
3334 | /// |
3335 | /// \verbatim |
3336 | /// argument-expression-list: |
3337 | /// assignment-expression |
3338 | /// argument-expression-list , assignment-expression |
3339 | /// |
3340 | /// [C++] expression-list: |
3341 | /// [C++] assignment-expression |
3342 | /// [C++] expression-list , assignment-expression |
3343 | /// |
3344 | /// [C++0x] expression-list: |
3345 | /// [C++0x] initializer-list |
3346 | /// |
3347 | /// [C++0x] initializer-list |
3348 | /// [C++0x] initializer-clause ...[opt] |
3349 | /// [C++0x] initializer-list , initializer-clause ...[opt] |
3350 | /// |
3351 | /// [C++0x] initializer-clause: |
3352 | /// [C++0x] assignment-expression |
3353 | /// [C++0x] braced-init-list |
3354 | /// \endverbatim |
3355 | bool Parser::ParseExpressionList(SmallVectorImpl<Expr *> &Exprs, |
3356 | SmallVectorImpl<SourceLocation> &CommaLocs, |
3357 | llvm::function_ref<void()> ExpressionStarts) { |
3358 | bool SawError = false; |
3359 | while (1) { |
3360 | if (ExpressionStarts) |
3361 | ExpressionStarts(); |
3362 | |
3363 | ExprResult Expr; |
3364 | if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) { |
3365 | Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists); |
3366 | Expr = ParseBraceInitializer(); |
3367 | } else |
3368 | Expr = ParseAssignmentExpression(); |
3369 | |
3370 | if (Tok.is(tok::ellipsis)) |
3371 | Expr = Actions.ActOnPackExpansion(Expr.get(), ConsumeToken()); |
3372 | else if (Tok.is(tok::code_completion)) { |
3373 | // There's nothing to suggest in here as we parsed a full expression. |
3374 | // Instead fail and propogate the error since caller might have something |
3375 | // the suggest, e.g. signature help in function call. Note that this is |
3376 | // performed before pushing the \p Expr, so that signature help can report |
3377 | // current argument correctly. |
3378 | SawError = true; |
3379 | cutOffParsing(); |
3380 | break; |
3381 | } |
3382 | if (Expr.isInvalid()) { |
3383 | SkipUntil(tok::comma, tok::r_paren, StopBeforeMatch); |
3384 | SawError = true; |
3385 | } else { |
3386 | Exprs.push_back(Expr.get()); |
3387 | } |
3388 | |
3389 | if (Tok.isNot(tok::comma)) |
3390 | break; |
3391 | // Move to the next argument, remember where the comma was. |
3392 | Token Comma = Tok; |
3393 | CommaLocs.push_back(ConsumeToken()); |
3394 | |
3395 | checkPotentialAngleBracketDelimiter(Comma); |
3396 | } |
3397 | if (SawError) { |
3398 | // Ensure typos get diagnosed when errors were encountered while parsing the |
3399 | // expression list. |
3400 | for (auto &E : Exprs) { |
3401 | ExprResult Expr = Actions.CorrectDelayedTyposInExpr(E); |
3402 | if (Expr.isUsable()) E = Expr.get(); |
3403 | } |
3404 | } |
3405 | return SawError; |
3406 | } |
3407 | |
3408 | /// ParseSimpleExpressionList - A simple comma-separated list of expressions, |
3409 | /// used for misc language extensions. |
3410 | /// |
3411 | /// \verbatim |
3412 | /// simple-expression-list: |
3413 | /// assignment-expression |
3414 | /// simple-expression-list , assignment-expression |
3415 | /// \endverbatim |
3416 | bool |
3417 | Parser::ParseSimpleExpressionList(SmallVectorImpl<Expr*> &Exprs, |
3418 | SmallVectorImpl<SourceLocation> &CommaLocs) { |
3419 | while (1) { |
3420 | ExprResult Expr = ParseAssignmentExpression(); |
3421 | if (Expr.isInvalid()) |
3422 | return true; |
3423 | |
3424 | Exprs.push_back(Expr.get()); |
3425 | |
3426 | if (Tok.isNot(tok::comma)) |
3427 | return false; |
3428 | |
3429 | // Move to the next argument, remember where the comma was. |
3430 | Token Comma = Tok; |
3431 | CommaLocs.push_back(ConsumeToken()); |
3432 | |
3433 | checkPotentialAngleBracketDelimiter(Comma); |
3434 | } |
3435 | } |
3436 | |
3437 | /// ParseBlockId - Parse a block-id, which roughly looks like int (int x). |
3438 | /// |
3439 | /// \verbatim |
3440 | /// [clang] block-id: |
3441 | /// [clang] specifier-qualifier-list block-declarator |
3442 | /// \endverbatim |
3443 | void Parser::ParseBlockId(SourceLocation CaretLoc) { |
3444 | if (Tok.is(tok::code_completion)) { |
3445 | cutOffParsing(); |
3446 | Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Type); |
3447 | return; |
3448 | } |
3449 | |
3450 | // Parse the specifier-qualifier-list piece. |
3451 | DeclSpec DS(AttrFactory); |
3452 | ParseSpecifierQualifierList(DS); |
3453 | |
3454 | // Parse the block-declarator. |
3455 | Declarator DeclaratorInfo(DS, DeclaratorContext::BlockLiteral); |
3456 | DeclaratorInfo.setFunctionDefinitionKind(FunctionDefinitionKind::Definition); |
3457 | ParseDeclarator(DeclaratorInfo); |
3458 | |
3459 | MaybeParseGNUAttributes(DeclaratorInfo); |
3460 | |
3461 | // Inform sema that we are starting a block. |
3462 | Actions.ActOnBlockArguments(CaretLoc, DeclaratorInfo, getCurScope()); |
3463 | } |
3464 | |
3465 | /// ParseBlockLiteralExpression - Parse a block literal, which roughly looks |
3466 | /// like ^(int x){ return x+1; } |
3467 | /// |
3468 | /// \verbatim |
3469 | /// block-literal: |
3470 | /// [clang] '^' block-args[opt] compound-statement |
3471 | /// [clang] '^' block-id compound-statement |
3472 | /// [clang] block-args: |
3473 | /// [clang] '(' parameter-list ')' |
3474 | /// \endverbatim |
3475 | ExprResult Parser::ParseBlockLiteralExpression() { |
3476 | assert(Tok.is(tok::caret) && "block literal starts with ^")((void)0); |
3477 | SourceLocation CaretLoc = ConsumeToken(); |
3478 | |
3479 | PrettyStackTraceLoc CrashInfo(PP.getSourceManager(), CaretLoc, |
3480 | "block literal parsing"); |
3481 | |
3482 | // Enter a scope to hold everything within the block. This includes the |
3483 | // argument decls, decls within the compound expression, etc. This also |
3484 | // allows determining whether a variable reference inside the block is |
3485 | // within or outside of the block. |
3486 | ParseScope BlockScope(this, Scope::BlockScope | Scope::FnScope | |
3487 | Scope::CompoundStmtScope | Scope::DeclScope); |
3488 | |
3489 | // Inform sema that we are starting a block. |
3490 | Actions.ActOnBlockStart(CaretLoc, getCurScope()); |
3491 | |
3492 | // Parse the return type if present. |
3493 | DeclSpec DS(AttrFactory); |
3494 | Declarator ParamInfo(DS, DeclaratorContext::BlockLiteral); |
3495 | ParamInfo.setFunctionDefinitionKind(FunctionDefinitionKind::Definition); |
3496 | // FIXME: Since the return type isn't actually parsed, it can't be used to |
3497 | // fill ParamInfo with an initial valid range, so do it manually. |
3498 | ParamInfo.SetSourceRange(SourceRange(Tok.getLocation(), Tok.getLocation())); |
3499 | |
3500 | // If this block has arguments, parse them. There is no ambiguity here with |
3501 | // the expression case, because the expression case requires a parameter list. |
3502 | if (Tok.is(tok::l_paren)) { |
3503 | ParseParenDeclarator(ParamInfo); |
3504 | // Parse the pieces after the identifier as if we had "int(...)". |
3505 | // SetIdentifier sets the source range end, but in this case we're past |
3506 | // that location. |
3507 | SourceLocation Tmp = ParamInfo.getSourceRange().getEnd(); |
3508 | ParamInfo.SetIdentifier(nullptr, CaretLoc); |
3509 | ParamInfo.SetRangeEnd(Tmp); |
3510 | if (ParamInfo.isInvalidType()) { |
3511 | // If there was an error parsing the arguments, they may have |
3512 | // tried to use ^(x+y) which requires an argument list. Just |
3513 | // skip the whole block literal. |
3514 | Actions.ActOnBlockError(CaretLoc, getCurScope()); |
3515 | return ExprError(); |
3516 | } |
3517 | |
3518 | MaybeParseGNUAttributes(ParamInfo); |
3519 | |
3520 | // Inform sema that we are starting a block. |
3521 | Actions.ActOnBlockArguments(CaretLoc, ParamInfo, getCurScope()); |
3522 | } else if (!Tok.is(tok::l_brace)) { |
3523 | ParseBlockId(CaretLoc); |
3524 | } else { |
3525 | // Otherwise, pretend we saw (void). |
3526 | SourceLocation NoLoc; |
3527 | ParamInfo.AddTypeInfo( |
3528 | DeclaratorChunk::getFunction(/*HasProto=*/true, |
3529 | /*IsAmbiguous=*/false, |
3530 | /*RParenLoc=*/NoLoc, |
3531 | /*ArgInfo=*/nullptr, |
3532 | /*NumParams=*/0, |
3533 | /*EllipsisLoc=*/NoLoc, |
3534 | /*RParenLoc=*/NoLoc, |
3535 | /*RefQualifierIsLvalueRef=*/true, |
3536 | /*RefQualifierLoc=*/NoLoc, |
3537 | /*MutableLoc=*/NoLoc, EST_None, |
3538 | /*ESpecRange=*/SourceRange(), |
3539 | /*Exceptions=*/nullptr, |
3540 | /*ExceptionRanges=*/nullptr, |
3541 | /*NumExceptions=*/0, |
3542 | /*NoexceptExpr=*/nullptr, |
3543 | /*ExceptionSpecTokens=*/nullptr, |
3544 | /*DeclsInPrototype=*/None, CaretLoc, |
3545 | CaretLoc, ParamInfo), |
3546 | CaretLoc); |
3547 | |
3548 | MaybeParseGNUAttributes(ParamInfo); |
3549 | |
3550 | // Inform sema that we are starting a block. |
3551 | Actions.ActOnBlockArguments(CaretLoc, ParamInfo, getCurScope()); |
3552 | } |
3553 | |
3554 | |
3555 | ExprResult Result(true); |
3556 | if (!Tok.is(tok::l_brace)) { |
3557 | // Saw something like: ^expr |
3558 | Diag(Tok, diag::err_expected_expression); |
3559 | Actions.ActOnBlockError(CaretLoc, getCurScope()); |
3560 | return ExprError(); |
3561 | } |
3562 | |
3563 | StmtResult Stmt(ParseCompoundStatementBody()); |
3564 | BlockScope.Exit(); |
3565 | if (!Stmt.isInvalid()) |
3566 | Result = Actions.ActOnBlockStmtExpr(CaretLoc, Stmt.get(), getCurScope()); |
3567 | else |
3568 | Actions.ActOnBlockError(CaretLoc, getCurScope()); |
3569 | return Result; |
3570 | } |
3571 | |
3572 | /// ParseObjCBoolLiteral - This handles the objective-c Boolean literals. |
3573 | /// |
3574 | /// '__objc_yes' |
3575 | /// '__objc_no' |
3576 | ExprResult Parser::ParseObjCBoolLiteral() { |
3577 | tok::TokenKind Kind = Tok.getKind(); |
3578 | return Actions.ActOnObjCBoolLiteral(ConsumeToken(), Kind); |
3579 | } |
3580 | |
3581 | /// Validate availability spec list, emitting diagnostics if necessary. Returns |
3582 | /// true if invalid. |
3583 | static bool CheckAvailabilitySpecList(Parser &P, |
3584 | ArrayRef<AvailabilitySpec> AvailSpecs) { |
3585 | llvm::SmallSet<StringRef, 4> Platforms; |
3586 | bool HasOtherPlatformSpec = false; |
3587 | bool Valid = true; |
3588 | for (const auto &Spec : AvailSpecs) { |
3589 | if (Spec.isOtherPlatformSpec()) { |
3590 | if (HasOtherPlatformSpec) { |
3591 | P.Diag(Spec.getBeginLoc(), diag::err_availability_query_repeated_star); |
3592 | Valid = false; |
3593 | } |
3594 | |
3595 | HasOtherPlatformSpec = true; |
3596 | continue; |
3597 | } |
3598 | |
3599 | bool Inserted = Platforms.insert(Spec.getPlatform()).second; |
3600 | if (!Inserted) { |
3601 | // Rule out multiple version specs referring to the same platform. |
3602 | // For example, we emit an error for: |
3603 | // @available(macos 10.10, macos 10.11, *) |
3604 | StringRef Platform = Spec.getPlatform(); |
3605 | P.Diag(Spec.getBeginLoc(), diag::err_availability_query_repeated_platform) |
3606 | << Spec.getEndLoc() << Platform; |
3607 | Valid = false; |
3608 | } |
3609 | } |
3610 | |
3611 | if (!HasOtherPlatformSpec) { |
3612 | SourceLocation InsertWildcardLoc = AvailSpecs.back().getEndLoc(); |
3613 | P.Diag(InsertWildcardLoc, diag::err_availability_query_wildcard_required) |
3614 | << FixItHint::CreateInsertion(InsertWildcardLoc, ", *"); |
3615 | return true; |
3616 | } |
3617 | |
3618 | return !Valid; |
3619 | } |
3620 | |
3621 | /// Parse availability query specification. |
3622 | /// |
3623 | /// availability-spec: |
3624 | /// '*' |
3625 | /// identifier version-tuple |
3626 | Optional<AvailabilitySpec> Parser::ParseAvailabilitySpec() { |
3627 | if (Tok.is(tok::star)) { |
3628 | return AvailabilitySpec(ConsumeToken()); |
3629 | } else { |
3630 | // Parse the platform name. |
3631 | if (Tok.is(tok::code_completion)) { |
3632 | cutOffParsing(); |
3633 | Actions.CodeCompleteAvailabilityPlatformName(); |
3634 | return None; |
3635 | } |
3636 | if (Tok.isNot(tok::identifier)) { |
3637 | Diag(Tok, diag::err_avail_query_expected_platform_name); |
3638 | return None; |
3639 | } |
3640 | |
3641 | IdentifierLoc *PlatformIdentifier = ParseIdentifierLoc(); |
3642 | SourceRange VersionRange; |
3643 | VersionTuple Version = ParseVersionTuple(VersionRange); |
3644 | |
3645 | if (Version.empty()) |
3646 | return None; |
3647 | |
3648 | StringRef GivenPlatform = PlatformIdentifier->Ident->getName(); |
3649 | StringRef Platform = |
3650 | AvailabilityAttr::canonicalizePlatformName(GivenPlatform); |
3651 | |
3652 | if (AvailabilityAttr::getPrettyPlatformName(Platform).empty()) { |
3653 | Diag(PlatformIdentifier->Loc, |
3654 | diag::err_avail_query_unrecognized_platform_name) |
3655 | << GivenPlatform; |
3656 | return None; |
3657 | } |
3658 | |
3659 | return AvailabilitySpec(Version, Platform, PlatformIdentifier->Loc, |
3660 | VersionRange.getEnd()); |
3661 | } |
3662 | } |
3663 | |
3664 | ExprResult Parser::ParseAvailabilityCheckExpr(SourceLocation BeginLoc) { |
3665 | assert(Tok.is(tok::kw___builtin_available) ||((void)0) |
3666 | Tok.isObjCAtKeyword(tok::objc_available))((void)0); |
3667 | |
3668 | // Eat the available or __builtin_available. |
3669 | ConsumeToken(); |
3670 | |
3671 | BalancedDelimiterTracker Parens(*this, tok::l_paren); |
3672 | if (Parens.expectAndConsume()) |
3673 | return ExprError(); |
3674 | |
3675 | SmallVector<AvailabilitySpec, 4> AvailSpecs; |
3676 | bool HasError = false; |
3677 | while (true) { |
3678 | Optional<AvailabilitySpec> Spec = ParseAvailabilitySpec(); |
3679 | if (!Spec) |
3680 | HasError = true; |
3681 | else |
3682 | AvailSpecs.push_back(*Spec); |
3683 | |
3684 | if (!TryConsumeToken(tok::comma)) |
3685 | break; |
3686 | } |
3687 | |
3688 | if (HasError) { |
3689 | SkipUntil(tok::r_paren, StopAtSemi); |
3690 | return ExprError(); |
3691 | } |
3692 | |
3693 | CheckAvailabilitySpecList(*this, AvailSpecs); |
3694 | |
3695 | if (Parens.consumeClose()) |
3696 | return ExprError(); |
3697 | |
3698 | return Actions.ActOnObjCAvailabilityCheckExpr(AvailSpecs, BeginLoc, |
3699 | Parens.getCloseLocation()); |
3700 | } |