clang  14.0.0git
ParseExpr.cpp
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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"
28 #include "clang/Sema/DeclSpec.h"
30 #include "clang/Sema/Scope.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
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 ///
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.
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.
161  if (Tok.is(tok::code_completion)) {
162  cutOffParsing();
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.
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 
202  assert(Actions.ExprEvalContexts.back().Context ==
204  "Call this function only if your ExpressionEvaluationContext is "
205  "already ConstantEvaluated");
206  ExprResult LHS(ParseCastExpression(AnyCastExpr, false, isTypeCast));
207  ExprResult Res(ParseRHSOfBinaryExpression(LHS, prec::Conditional));
208  return Actions.ActOnConstantExpression(Res);
209 }
210 
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(
218  return ParseConstantExpressionInExprEvalContext(isTypeCast);
219 }
220 
222  EnterExpressionEvaluationContext 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
236  EnterExpressionEvaluationContext ConstantEvaluated(
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
257 Parser::ParseConstraintLogicalAndExpression(bool IsTrailingRequiresClause) {
258  EnterExpressionEvaluationContext ConstantEvaluated(
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)
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
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 &&
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.
396 Parser::ParseRHSOfBinaryExpression(ExprResult LHS, prec::Level MinPrec) {
397  prec::Level NextTokPrec = getBinOpPrecedence(Tok.getKind(),
398  GreaterThanIsOperator,
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.
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());
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)
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,
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,
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;
947  LLVM_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() &&
1027  "should not perform typo correction on annotation token");
1028  break;
1029  }
1030 
1031  case tok::kw___super:
1032  case tok::kw_decltype:
1033  // Annotate the token and tail recurse.
1035  return ExprError();
1036  assert(Tok.isNot(tok::kw_decltype) && Tok.isNot(tok::kw___super));
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) &&
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.
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();
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());
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;
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()) {
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;
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___ibm128:
1525  case tok::kw_void:
1526  case tok::kw_typename:
1527  case tok::kw_typeof:
1528  case tok::kw___vector:
1529 #define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t:
1530 #include "clang/Basic/OpenCLImageTypes.def"
1531  {
1532  if (!getLangOpts().CPlusPlus) {
1533  Diag(Tok, diag::err_expected_expression);
1534  return ExprError();
1535  }
1536 
1537  // Everything henceforth is a postfix-expression.
1538  if (NotPrimaryExpression)
1539  *NotPrimaryExpression = true;
1540 
1541  if (SavedKind == tok::kw_typename) {
1542  // postfix-expression: typename-specifier '(' expression-list[opt] ')'
1543  // typename-specifier braced-init-list
1545  return ExprError();
1546 
1547  if (!Actions.isSimpleTypeSpecifier(Tok.getKind()))
1548  // We are trying to parse a simple-type-specifier but might not get such
1549  // a token after error recovery.
1550  return ExprError();
1551  }
1552 
1553  // postfix-expression: simple-type-specifier '(' expression-list[opt] ')'
1554  // simple-type-specifier braced-init-list
1555  //
1556  DeclSpec DS(AttrFactory);
1557 
1558  ParseCXXSimpleTypeSpecifier(DS);
1559  if (Tok.isNot(tok::l_paren) &&
1560  (!getLangOpts().CPlusPlus11 || Tok.isNot(tok::l_brace)))
1561  return ExprError(Diag(Tok, diag::err_expected_lparen_after_type)
1562  << DS.getSourceRange());
1563 
1564  if (Tok.is(tok::l_brace))
1565  Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
1566 
1567  Res = ParseCXXTypeConstructExpression(DS);
1568  break;
1569  }
1570 
1571  case tok::annot_cxxscope: { // [C++] id-expression: qualified-id
1572  // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse.
1573  // (We can end up in this situation after tentative parsing.)
1575  return ExprError();
1576  if (!Tok.is(tok::annot_cxxscope))
1577  return ParseCastExpression(ParseKind, isAddressOfOperand, NotCastExpr,
1578  isTypeCast, isVectorLiteral,
1579  NotPrimaryExpression);
1580 
1581  Token Next = NextToken();
1582  if (Next.is(tok::annot_template_id)) {
1583  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Next);
1584  if (TemplateId->Kind == TNK_Type_template) {
1585  // We have a qualified template-id that we know refers to a
1586  // type, translate it into a type and continue parsing as a
1587  // cast expression.
1588  CXXScopeSpec SS;
1589  ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
1590  /*ObjectHadErrors=*/false,
1591  /*EnteringContext=*/false);
1592  AnnotateTemplateIdTokenAsType(SS);
1593  return ParseCastExpression(ParseKind, isAddressOfOperand, NotCastExpr,
1594  isTypeCast, isVectorLiteral,
1595  NotPrimaryExpression);
1596  }
1597  }
1598 
1599  // Parse as an id-expression.
1600  Res = ParseCXXIdExpression(isAddressOfOperand);
1601  break;
1602  }
1603 
1604  case tok::annot_template_id: { // [C++] template-id
1605  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1606  if (TemplateId->Kind == TNK_Type_template) {
1607  // We have a template-id that we know refers to a type,
1608  // translate it into a type and continue parsing as a cast
1609  // expression.
1610  CXXScopeSpec SS;
1611  AnnotateTemplateIdTokenAsType(SS);
1612  return ParseCastExpression(ParseKind, isAddressOfOperand,
1613  NotCastExpr, isTypeCast, isVectorLiteral,
1614  NotPrimaryExpression);
1615  }
1616 
1617  // Fall through to treat the template-id as an id-expression.
1618  LLVM_FALLTHROUGH;
1619  }
1620 
1621  case tok::kw_operator: // [C++] id-expression: operator/conversion-function-id
1622  Res = ParseCXXIdExpression(isAddressOfOperand);
1623  break;
1624 
1625  case tok::coloncolon: {
1626  // ::foo::bar -> global qualified name etc. If TryAnnotateTypeOrScopeToken
1627  // annotates the token, tail recurse.
1629  return ExprError();
1630  if (!Tok.is(tok::coloncolon))
1631  return ParseCastExpression(ParseKind, isAddressOfOperand, isTypeCast,
1632  isVectorLiteral, NotPrimaryExpression);
1633 
1634  // ::new -> [C++] new-expression
1635  // ::delete -> [C++] delete-expression
1636  SourceLocation CCLoc = ConsumeToken();
1637  if (Tok.is(tok::kw_new)) {
1638  if (NotPrimaryExpression)
1639  *NotPrimaryExpression = true;
1640  Res = ParseCXXNewExpression(true, CCLoc);
1641  AllowSuffix = false;
1642  break;
1643  }
1644  if (Tok.is(tok::kw_delete)) {
1645  if (NotPrimaryExpression)
1646  *NotPrimaryExpression = true;
1647  Res = ParseCXXDeleteExpression(true, CCLoc);
1648  AllowSuffix = false;
1649  break;
1650  }
1651 
1652  // This is not a type name or scope specifier, it is an invalid expression.
1653  Diag(CCLoc, diag::err_expected_expression);
1654  return ExprError();
1655  }
1656 
1657  case tok::kw_new: // [C++] new-expression
1658  if (NotPrimaryExpression)
1659  *NotPrimaryExpression = true;
1660  Res = ParseCXXNewExpression(false, Tok.getLocation());
1661  AllowSuffix = false;
1662  break;
1663 
1664  case tok::kw_delete: // [C++] delete-expression
1665  if (NotPrimaryExpression)
1666  *NotPrimaryExpression = true;
1667  Res = ParseCXXDeleteExpression(false, Tok.getLocation());
1668  AllowSuffix = false;
1669  break;
1670 
1671  case tok::kw_requires: // [C++2a] requires-expression
1672  Res = ParseRequiresExpression();
1673  AllowSuffix = false;
1674  break;
1675 
1676  case tok::kw_noexcept: { // [C++0x] 'noexcept' '(' expression ')'
1677  if (NotPrimaryExpression)
1678  *NotPrimaryExpression = true;
1679  Diag(Tok, diag::warn_cxx98_compat_noexcept_expr);
1680  SourceLocation KeyLoc = ConsumeToken();
1681  BalancedDelimiterTracker T(*this, tok::l_paren);
1682 
1683  if (T.expectAndConsume(diag::err_expected_lparen_after, "noexcept"))
1684  return ExprError();
1685  // C++11 [expr.unary.noexcept]p1:
1686  // The noexcept operator determines whether the evaluation of its operand,
1687  // which is an unevaluated operand, can throw an exception.
1690  Res = ParseExpression();
1691 
1692  T.consumeClose();
1693 
1694  if (!Res.isInvalid())
1695  Res = Actions.ActOnNoexceptExpr(KeyLoc, T.getOpenLocation(), Res.get(),
1696  T.getCloseLocation());
1697  AllowSuffix = false;
1698  break;
1699  }
1700 
1701 #define TYPE_TRAIT(N,Spelling,K) \
1702  case tok::kw_##Spelling:
1703 #include "clang/Basic/TokenKinds.def"
1704  Res = ParseTypeTrait();
1705  break;
1706 
1707  case tok::kw___array_rank:
1708  case tok::kw___array_extent:
1709  if (NotPrimaryExpression)
1710  *NotPrimaryExpression = true;
1711  Res = ParseArrayTypeTrait();
1712  break;
1713 
1714  case tok::kw___is_lvalue_expr:
1715  case tok::kw___is_rvalue_expr:
1716  if (NotPrimaryExpression)
1717  *NotPrimaryExpression = true;
1718  Res = ParseExpressionTrait();
1719  break;
1720 
1721  case tok::at: {
1722  if (NotPrimaryExpression)
1723  *NotPrimaryExpression = true;
1724  SourceLocation AtLoc = ConsumeToken();
1725  return ParseObjCAtExpression(AtLoc);
1726  }
1727  case tok::caret:
1728  Res = ParseBlockLiteralExpression();
1729  break;
1730  case tok::code_completion: {
1731  cutOffParsing();
1733  PreferredType.get(Tok.getLocation()));
1734  return ExprError();
1735  }
1736  case tok::l_square:
1737  if (getLangOpts().CPlusPlus11) {
1738  if (getLangOpts().ObjC) {
1739  // C++11 lambda expressions and Objective-C message sends both start with a
1740  // square bracket. There are three possibilities here:
1741  // we have a valid lambda expression, we have an invalid lambda
1742  // expression, or we have something that doesn't appear to be a lambda.
1743  // If we're in the last case, we fall back to ParseObjCMessageExpression.
1744  Res = TryParseLambdaExpression();
1745  if (!Res.isInvalid() && !Res.get()) {
1746  // We assume Objective-C++ message expressions are not
1747  // primary-expressions.
1748  if (NotPrimaryExpression)
1749  *NotPrimaryExpression = true;
1750  Res = ParseObjCMessageExpression();
1751  }
1752  break;
1753  }
1754  Res = ParseLambdaExpression();
1755  break;
1756  }
1757  if (getLangOpts().ObjC) {
1758  Res = ParseObjCMessageExpression();
1759  break;
1760  }
1761  LLVM_FALLTHROUGH;
1762  default:
1763  NotCastExpr = true;
1764  return ExprError();
1765  }
1766 
1767  // Check to see whether Res is a function designator only. If it is and we
1768  // are compiling for OpenCL, we need to return an error as this implies
1769  // that the address of the function is being taken, which is illegal in CL.
1770 
1771  if (ParseKind == PrimaryExprOnly)
1772  // This is strictly a primary-expression - no postfix-expr pieces should be
1773  // parsed.
1774  return Res;
1775 
1776  if (!AllowSuffix) {
1777  // FIXME: Don't parse a primary-expression suffix if we encountered a parse
1778  // error already.
1779  if (Res.isInvalid())
1780  return Res;
1781 
1782  switch (Tok.getKind()) {
1783  case tok::l_square:
1784  case tok::l_paren:
1785  case tok::plusplus:
1786  case tok::minusminus:
1787  // "expected ';'" or similar is probably the right diagnostic here. Let
1788  // the caller decide what to do.
1789  if (Tok.isAtStartOfLine())
1790  return Res;
1791 
1792  LLVM_FALLTHROUGH;
1793  case tok::period:
1794  case tok::arrow:
1795  break;
1796 
1797  default:
1798  return Res;
1799  }
1800 
1801  // This was a unary-expression for which a postfix-expression suffix is
1802  // not permitted by the grammar (eg, a sizeof expression or
1803  // new-expression or similar). Diagnose but parse the suffix anyway.
1804  Diag(Tok.getLocation(), diag::err_postfix_after_unary_requires_parens)
1805  << Tok.getKind() << Res.get()->getSourceRange()
1806  << FixItHint::CreateInsertion(Res.get()->getBeginLoc(), "(")
1807  << FixItHint::CreateInsertion(PP.getLocForEndOfToken(PrevTokLocation),
1808  ")");
1809  }
1810 
1811  // These can be followed by postfix-expr pieces.
1812  PreferredType = SavedType;
1813  Res = ParsePostfixExpressionSuffix(Res);
1814  if (getLangOpts().OpenCL &&
1815  !getActions().getOpenCLOptions().isAvailableOption(
1816  "__cl_clang_function_pointers", getLangOpts()))
1817  if (Expr *PostfixExpr = Res.get()) {
1818  QualType Ty = PostfixExpr->getType();
1819  if (!Ty.isNull() && Ty->isFunctionType()) {
1820  Diag(PostfixExpr->getExprLoc(),
1821  diag::err_opencl_taking_function_address_parser);
1822  return ExprError();
1823  }
1824  }
1825 
1826  return Res;
1827 }
1828 
1829 /// Once the leading part of a postfix-expression is parsed, this
1830 /// method parses any suffixes that apply.
1831 ///
1832 /// \verbatim
1833 /// postfix-expression: [C99 6.5.2]
1834 /// primary-expression
1835 /// postfix-expression '[' expression ']'
1836 /// postfix-expression '[' braced-init-list ']'
1837 /// postfix-expression '(' argument-expression-list[opt] ')'
1838 /// postfix-expression '.' identifier
1839 /// postfix-expression '->' identifier
1840 /// postfix-expression '++'
1841 /// postfix-expression '--'
1842 /// '(' type-name ')' '{' initializer-list '}'
1843 /// '(' type-name ')' '{' initializer-list ',' '}'
1844 ///
1845 /// argument-expression-list: [C99 6.5.2]
1846 /// argument-expression ...[opt]
1847 /// argument-expression-list ',' assignment-expression ...[opt]
1848 /// \endverbatim
1849 ExprResult
1850 Parser::ParsePostfixExpressionSuffix(ExprResult LHS) {
1851  // Now that the primary-expression piece of the postfix-expression has been
1852  // parsed, see if there are any postfix-expression pieces here.
1853  SourceLocation Loc;
1854  auto SavedType = PreferredType;
1855  while (1) {
1856  // Each iteration relies on preferred type for the whole expression.
1857  PreferredType = SavedType;
1858  switch (Tok.getKind()) {
1859  case tok::code_completion:
1860  if (InMessageExpression)
1861  return LHS;
1862 
1863  cutOffParsing();
1865  getCurScope(), LHS, PreferredType.get(Tok.getLocation()));
1866  return ExprError();
1867 
1868  case tok::identifier:
1869  // If we see identifier: after an expression, and we're not already in a
1870  // message send, then this is probably a message send with a missing
1871  // opening bracket '['.
1872  if (getLangOpts().ObjC && !InMessageExpression &&
1873  (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) {
1874  LHS = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(),
1875  nullptr, LHS.get());
1876  break;
1877  }
1878  // Fall through; this isn't a message send.
1879  LLVM_FALLTHROUGH;
1880 
1881  default: // Not a postfix-expression suffix.
1882  return LHS;
1883  case tok::l_square: { // postfix-expression: p-e '[' expression ']'
1884  // If we have a array postfix expression that starts on a new line and
1885  // Objective-C is enabled, it is highly likely that the user forgot a
1886  // semicolon after the base expression and that the array postfix-expr is
1887  // actually another message send. In this case, do some look-ahead to see
1888  // if the contents of the square brackets are obviously not a valid
1889  // expression and recover by pretending there is no suffix.
1890  if (getLangOpts().ObjC && Tok.isAtStartOfLine() &&
1891  isSimpleObjCMessageExpression())
1892  return LHS;
1893 
1894  // Reject array indices starting with a lambda-expression. '[[' is
1895  // reserved for attributes.
1896  if (CheckProhibitedCXX11Attribute()) {
1897  (void)Actions.CorrectDelayedTyposInExpr(LHS);
1898  return ExprError();
1899  }
1900 
1901  BalancedDelimiterTracker T(*this, tok::l_square);
1902  T.consumeOpen();
1903  Loc = T.getOpenLocation();
1904  ExprResult Idx, Length, Stride;
1905  SourceLocation ColonLocFirst, ColonLocSecond;
1906  PreferredType.enterSubscript(Actions, Tok.getLocation(), LHS.get());
1907  if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
1908  Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
1909  Idx = ParseBraceInitializer();
1910  } else if (getLangOpts().OpenMP) {
1911  ColonProtectionRAIIObject RAII(*this);
1912  // Parse [: or [ expr or [ expr :
1913  if (!Tok.is(tok::colon)) {
1914  // [ expr
1915  Idx = ParseExpression();
1916  }
1917  if (Tok.is(tok::colon)) {
1918  // Consume ':'
1919  ColonLocFirst = ConsumeToken();
1920  if (Tok.isNot(tok::r_square) &&
1921  (getLangOpts().OpenMP < 50 ||
1922  ((Tok.isNot(tok::colon) && getLangOpts().OpenMP >= 50))))
1923  Length = ParseExpression();
1924  }
1925  if (getLangOpts().OpenMP >= 50 &&
1926  (OMPClauseKind == llvm::omp::Clause::OMPC_to ||
1927  OMPClauseKind == llvm::omp::Clause::OMPC_from) &&
1928  Tok.is(tok::colon)) {
1929  // Consume ':'
1930  ColonLocSecond = ConsumeToken();
1931  if (Tok.isNot(tok::r_square)) {
1932  Stride = ParseExpression();
1933  }
1934  }
1935  } else
1936  Idx = ParseExpression();
1937 
1938  SourceLocation RLoc = Tok.getLocation();
1939 
1940  LHS = Actions.CorrectDelayedTyposInExpr(LHS);
1941  Idx = Actions.CorrectDelayedTyposInExpr(Idx);
1942  Length = Actions.CorrectDelayedTyposInExpr(Length);
1943  if (!LHS.isInvalid() && !Idx.isInvalid() && !Length.isInvalid() &&
1944  !Stride.isInvalid() && Tok.is(tok::r_square)) {
1945  if (ColonLocFirst.isValid() || ColonLocSecond.isValid()) {
1946  LHS = Actions.ActOnOMPArraySectionExpr(
1947  LHS.get(), Loc, Idx.get(), ColonLocFirst, ColonLocSecond,
1948  Length.get(), Stride.get(), RLoc);
1949  } else {
1950  LHS = Actions.ActOnArraySubscriptExpr(getCurScope(), LHS.get(), Loc,
1951  Idx.get(), RLoc);
1952  }
1953  } else {
1954  LHS = ExprError();
1955  Idx = ExprError();
1956  }
1957 
1958  // Match the ']'.
1959  T.consumeClose();
1960  break;
1961  }
1962 
1963  case tok::l_paren: // p-e: p-e '(' argument-expression-list[opt] ')'
1964  case tok::lesslessless: { // p-e: p-e '<<<' argument-expression-list '>>>'
1965  // '(' argument-expression-list[opt] ')'
1966  tok::TokenKind OpKind = Tok.getKind();
1967  InMessageExpressionRAIIObject InMessage(*this, false);
1968 
1969  Expr *ExecConfig = nullptr;
1970 
1971  BalancedDelimiterTracker PT(*this, tok::l_paren);
1972 
1973  if (OpKind == tok::lesslessless) {
1974  ExprVector ExecConfigExprs;
1975  CommaLocsTy ExecConfigCommaLocs;
1976  SourceLocation OpenLoc = ConsumeToken();
1977 
1978  if (ParseSimpleExpressionList(ExecConfigExprs, ExecConfigCommaLocs)) {
1979  (void)Actions.CorrectDelayedTyposInExpr(LHS);
1980  LHS = ExprError();
1981  }
1982 
1983  SourceLocation CloseLoc;
1984  if (TryConsumeToken(tok::greatergreatergreater, CloseLoc)) {
1985  } else if (LHS.isInvalid()) {
1986  SkipUntil(tok::greatergreatergreater, StopAtSemi);
1987  } else {
1988  // There was an error closing the brackets
1989  Diag(Tok, diag::err_expected) << tok::greatergreatergreater;
1990  Diag(OpenLoc, diag::note_matching) << tok::lesslessless;
1991  SkipUntil(tok::greatergreatergreater, StopAtSemi);
1992  LHS = ExprError();
1993  }
1994 
1995  if (!LHS.isInvalid()) {
1996  if (ExpectAndConsume(tok::l_paren))
1997  LHS = ExprError();
1998  else
1999  Loc = PrevTokLocation;
2000  }
2001 
2002  if (!LHS.isInvalid()) {
2003  ExprResult ECResult = Actions.ActOnCUDAExecConfigExpr(getCurScope(),
2004  OpenLoc,
2005  ExecConfigExprs,
2006  CloseLoc);
2007  if (ECResult.isInvalid())
2008  LHS = ExprError();
2009  else
2010  ExecConfig = ECResult.get();
2011  }
2012  } else {
2013  PT.consumeOpen();
2014  Loc = PT.getOpenLocation();
2015  }
2016 
2017  ExprVector ArgExprs;
2018  CommaLocsTy CommaLocs;
2019  auto RunSignatureHelp = [&]() -> QualType {
2020  QualType PreferredType = Actions.ProduceCallSignatureHelp(
2021  getCurScope(), LHS.get(), ArgExprs, PT.getOpenLocation());
2022  CalledSignatureHelp = true;
2023  return PreferredType;
2024  };
2025  if (OpKind == tok::l_paren || !LHS.isInvalid()) {
2026  if (Tok.isNot(tok::r_paren)) {
2027  if (ParseExpressionList(ArgExprs, CommaLocs, [&] {
2028  PreferredType.enterFunctionArgument(Tok.getLocation(),
2029  RunSignatureHelp);
2030  })) {
2031  (void)Actions.CorrectDelayedTyposInExpr(LHS);
2032  // If we got an error when parsing expression list, we don't call
2033  // the CodeCompleteCall handler inside the parser. So call it here
2034  // to make sure we get overload suggestions even when we are in the
2035  // middle of a parameter.
2036  if (PP.isCodeCompletionReached() && !CalledSignatureHelp)
2037  RunSignatureHelp();
2038  LHS = ExprError();
2039  } else if (LHS.isInvalid()) {
2040  for (auto &E : ArgExprs)
2041  Actions.CorrectDelayedTyposInExpr(E);
2042  }
2043  }
2044  }
2045 
2046  // Match the ')'.
2047  if (LHS.isInvalid()) {
2048  SkipUntil(tok::r_paren, StopAtSemi);
2049  } else if (Tok.isNot(tok::r_paren)) {
2050  bool HadDelayedTypo = false;
2051  if (Actions.CorrectDelayedTyposInExpr(LHS).get() != LHS.get())
2052  HadDelayedTypo = true;
2053  for (auto &E : ArgExprs)
2054  if (Actions.CorrectDelayedTyposInExpr(E).get() != E)
2055  HadDelayedTypo = true;
2056  // If there were delayed typos in the LHS or ArgExprs, call SkipUntil
2057  // instead of PT.consumeClose() to avoid emitting extra diagnostics for
2058  // the unmatched l_paren.
2059  if (HadDelayedTypo)
2060  SkipUntil(tok::r_paren, StopAtSemi);
2061  else
2062  PT.consumeClose();
2063  LHS = ExprError();
2064  } else {
2065  assert(
2066  (ArgExprs.size() == 0 || ArgExprs.size() - 1 == CommaLocs.size()) &&
2067  "Unexpected number of commas!");
2068  Expr *Fn = LHS.get();
2069  SourceLocation RParLoc = Tok.getLocation();
2070  LHS = Actions.ActOnCallExpr(getCurScope(), Fn, Loc, ArgExprs, RParLoc,
2071  ExecConfig);
2072  if (LHS.isInvalid()) {
2073  ArgExprs.insert(ArgExprs.begin(), Fn);
2074  LHS =
2075  Actions.CreateRecoveryExpr(Fn->getBeginLoc(), RParLoc, ArgExprs);
2076  }
2077  PT.consumeClose();
2078  }
2079 
2080  break;
2081  }
2082  case tok::arrow:
2083  case tok::period: {
2084  // postfix-expression: p-e '->' template[opt] id-expression
2085  // postfix-expression: p-e '.' template[opt] id-expression
2086  tok::TokenKind OpKind = Tok.getKind();
2087  SourceLocation OpLoc = ConsumeToken(); // Eat the "." or "->" token.
2088 
2089  CXXScopeSpec SS;
2090  ParsedType ObjectType;
2091  bool MayBePseudoDestructor = false;
2092  Expr* OrigLHS = !LHS.isInvalid() ? LHS.get() : nullptr;
2093 
2094  PreferredType.enterMemAccess(Actions, Tok.getLocation(), OrigLHS);
2095 
2096  if (getLangOpts().CPlusPlus && !LHS.isInvalid()) {
2097  Expr *Base = OrigLHS;
2098  const Type* BaseType = Base->getType().getTypePtrOrNull();
2099  if (BaseType && Tok.is(tok::l_paren) &&
2100  (BaseType->isFunctionType() ||
2101  BaseType->isSpecificPlaceholderType(BuiltinType::BoundMember))) {
2102  Diag(OpLoc, diag::err_function_is_not_record)
2103  << OpKind << Base->getSourceRange()
2104  << FixItHint::CreateRemoval(OpLoc);
2105  return ParsePostfixExpressionSuffix(Base);
2106  }
2107 
2108  LHS = Actions.ActOnStartCXXMemberReference(getCurScope(), Base, OpLoc,
2109  OpKind, ObjectType,
2110  MayBePseudoDestructor);
2111  if (LHS.isInvalid()) {
2112  // Clang will try to perform expression based completion as a
2113  // fallback, which is confusing in case of member references. So we
2114  // stop here without any completions.
2115  if (Tok.is(tok::code_completion)) {
2116  cutOffParsing();
2117  return ExprError();
2118  }
2119  break;
2120  }
2121  ParseOptionalCXXScopeSpecifier(
2122  SS, ObjectType, LHS.get() && LHS.get()->containsErrors(),
2123  /*EnteringContext=*/false, &MayBePseudoDestructor);
2124  if (SS.isNotEmpty())
2125  ObjectType = nullptr;
2126  }
2127 
2128  if (Tok.is(tok::code_completion)) {
2129  tok::TokenKind CorrectedOpKind =
2130  OpKind == tok::arrow ? tok::period : tok::arrow;
2131  ExprResult CorrectedLHS(/*Invalid=*/true);
2132  if (getLangOpts().CPlusPlus && OrigLHS) {
2133  // FIXME: Creating a TentativeAnalysisScope from outside Sema is a
2134  // hack.
2135  Sema::TentativeAnalysisScope Trap(Actions);
2136  CorrectedLHS = Actions.ActOnStartCXXMemberReference(
2137  getCurScope(), OrigLHS, OpLoc, CorrectedOpKind, ObjectType,
2138  MayBePseudoDestructor);
2139  }
2140 
2141  Expr *Base = LHS.get();
2142  Expr *CorrectedBase = CorrectedLHS.get();
2143  if (!CorrectedBase && !getLangOpts().CPlusPlus)
2144  CorrectedBase = Base;
2145 
2146  // Code completion for a member access expression.
2147  cutOffParsing();
2149  getCurScope(), Base, CorrectedBase, OpLoc, OpKind == tok::arrow,
2150  Base && ExprStatementTokLoc == Base->getBeginLoc(),
2151  PreferredType.get(Tok.getLocation()));
2152 
2153  return ExprError();
2154  }
2155 
2156  if (MayBePseudoDestructor && !LHS.isInvalid()) {
2157  LHS = ParseCXXPseudoDestructor(LHS.get(), OpLoc, OpKind, SS,
2158  ObjectType);
2159  break;
2160  }
2161 
2162  // Either the action has told us that this cannot be a
2163  // pseudo-destructor expression (based on the type of base
2164  // expression), or we didn't see a '~' in the right place. We
2165  // can still parse a destructor name here, but in that case it
2166  // names a real destructor.
2167  // Allow explicit constructor calls in Microsoft mode.
2168  // FIXME: Add support for explicit call of template constructor.
2169  SourceLocation TemplateKWLoc;
2170  UnqualifiedId Name;
2171  if (getLangOpts().ObjC && OpKind == tok::period &&
2172  Tok.is(tok::kw_class)) {
2173  // Objective-C++:
2174  // After a '.' in a member access expression, treat the keyword
2175  // 'class' as if it were an identifier.
2176  //
2177  // This hack allows property access to the 'class' method because it is
2178  // such a common method name. For other C++ keywords that are
2179  // Objective-C method names, one must use the message send syntax.
2181  SourceLocation Loc = ConsumeToken();
2182  Name.setIdentifier(Id, Loc);
2183  } else if (ParseUnqualifiedId(
2184  SS, ObjectType, LHS.get() && LHS.get()->containsErrors(),
2185  /*EnteringContext=*/false,
2186  /*AllowDestructorName=*/true,
2187  /*AllowConstructorName=*/
2188  getLangOpts().MicrosoftExt && SS.isNotEmpty(),
2189  /*AllowDeductionGuide=*/false, &TemplateKWLoc, Name)) {
2190  (void)Actions.CorrectDelayedTyposInExpr(LHS);
2191  LHS = ExprError();
2192  }
2193 
2194  if (!LHS.isInvalid())
2195  LHS = Actions.ActOnMemberAccessExpr(getCurScope(), LHS.get(), OpLoc,
2196  OpKind, SS, TemplateKWLoc, Name,
2197  CurParsedObjCImpl ? CurParsedObjCImpl->Dcl
2198  : nullptr);
2199  if (!LHS.isInvalid()) {
2200  if (Tok.is(tok::less))
2201  checkPotentialAngleBracket(LHS);
2202  } else if (OrigLHS && Name.isValid()) {
2203  // Preserve the LHS if the RHS is an invalid member.
2204  LHS = Actions.CreateRecoveryExpr(OrigLHS->getBeginLoc(),
2205  Name.getEndLoc(), {OrigLHS});
2206  }
2207  break;
2208  }
2209  case tok::plusplus: // postfix-expression: postfix-expression '++'
2210  case tok::minusminus: // postfix-expression: postfix-expression '--'
2211  if (!LHS.isInvalid()) {
2212  Expr *Arg = LHS.get();
2213  LHS = Actions.ActOnPostfixUnaryOp(getCurScope(), Tok.getLocation(),
2214  Tok.getKind(), Arg);
2215  if (LHS.isInvalid())
2216  LHS = Actions.CreateRecoveryExpr(Arg->getBeginLoc(),
2217  Tok.getLocation(), Arg);
2218  }
2219  ConsumeToken();
2220  break;
2221  }
2222  }
2223 }
2224 
2225 /// ParseExprAfterUnaryExprOrTypeTrait - We parsed a typeof/sizeof/alignof/
2226 /// vec_step and we are at the start of an expression or a parenthesized
2227 /// type-id. OpTok is the operand token (typeof/sizeof/alignof). Returns the
2228 /// expression (isCastExpr == false) or the type (isCastExpr == true).
2229 ///
2230 /// \verbatim
2231 /// unary-expression: [C99 6.5.3]
2232 /// 'sizeof' unary-expression
2233 /// 'sizeof' '(' type-name ')'
2234 /// [GNU] '__alignof' unary-expression
2235 /// [GNU] '__alignof' '(' type-name ')'
2236 /// [C11] '_Alignof' '(' type-name ')'
2237 /// [C++0x] 'alignof' '(' type-id ')'
2238 ///
2239 /// [GNU] typeof-specifier:
2240 /// typeof ( expressions )
2241 /// typeof ( type-name )
2242 /// [GNU/C++] typeof unary-expression
2243 ///
2244 /// [OpenCL 1.1 6.11.12] vec_step built-in function:
2245 /// vec_step ( expressions )
2246 /// vec_step ( type-name )
2247 /// \endverbatim
2248 ExprResult
2249 Parser::ParseExprAfterUnaryExprOrTypeTrait(const Token &OpTok,
2250  bool &isCastExpr,
2251  ParsedType &CastTy,
2252  SourceRange &CastRange) {
2253 
2254  assert(OpTok.isOneOf(tok::kw_typeof, tok::kw_sizeof, tok::kw___alignof,
2255  tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step,
2256  tok::kw___builtin_omp_required_simd_align) &&
2257  "Not a typeof/sizeof/alignof/vec_step expression!");
2258 
2260 
2261  // If the operand doesn't start with an '(', it must be an expression.
2262  if (Tok.isNot(tok::l_paren)) {
2263  // If construct allows a form without parenthesis, user may forget to put
2264  // pathenthesis around type name.
2265  if (OpTok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof,
2266  tok::kw__Alignof)) {
2267  if (isTypeIdUnambiguously()) {
2268  DeclSpec DS(AttrFactory);
2269  ParseSpecifierQualifierList(DS);
2270  Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName);
2271  ParseDeclarator(DeclaratorInfo);
2272 
2273  SourceLocation LParenLoc = PP.getLocForEndOfToken(OpTok.getLocation());
2274  SourceLocation RParenLoc = PP.getLocForEndOfToken(PrevTokLocation);
2275  if (LParenLoc.isInvalid() || RParenLoc.isInvalid()) {
2276  Diag(OpTok.getLocation(),
2277  diag::err_expected_parentheses_around_typename)
2278  << OpTok.getName();
2279  } else {
2280  Diag(LParenLoc, diag::err_expected_parentheses_around_typename)
2281  << OpTok.getName() << FixItHint::CreateInsertion(LParenLoc, "(")
2282  << FixItHint::CreateInsertion(RParenLoc, ")");
2283  }
2284  isCastExpr = true;
2285  return ExprEmpty();
2286  }
2287  }
2288 
2289  isCastExpr = false;
2290  if (OpTok.is(tok::kw_typeof) && !getLangOpts().CPlusPlus) {
2291  Diag(Tok, diag::err_expected_after) << OpTok.getIdentifierInfo()
2292  << tok::l_paren;
2293  return ExprError();
2294  }
2295 
2296  Operand = ParseCastExpression(UnaryExprOnly);
2297  } else {
2298  // If it starts with a '(', we know that it is either a parenthesized
2299  // type-name, or it is a unary-expression that starts with a compound
2300  // literal, or starts with a primary-expression that is a parenthesized
2301  // expression.
2302  ParenParseOption ExprType = CastExpr;
2303  SourceLocation LParenLoc = Tok.getLocation(), RParenLoc;
2304 
2305  Operand = ParseParenExpression(ExprType, true/*stopIfCastExpr*/,
2306  false, CastTy, RParenLoc);
2307  CastRange = SourceRange(LParenLoc, RParenLoc);
2308 
2309  // If ParseParenExpression parsed a '(typename)' sequence only, then this is
2310  // a type.
2311  if (ExprType == CastExpr) {
2312  isCastExpr = true;
2313  return ExprEmpty();
2314  }
2315 
2316  if (getLangOpts().CPlusPlus || OpTok.isNot(tok::kw_typeof)) {
2317  // GNU typeof in C requires the expression to be parenthesized. Not so for
2318  // sizeof/alignof or in C++. Therefore, the parenthesized expression is
2319  // the start of a unary-expression, but doesn't include any postfix
2320  // pieces. Parse these now if present.
2321  if (!Operand.isInvalid())
2322  Operand = ParsePostfixExpressionSuffix(Operand.get());
2323  }
2324  }
2325 
2326  // If we get here, the operand to the typeof/sizeof/alignof was an expression.
2327  isCastExpr = false;
2328  return Operand;
2329 }
2330 
2331 /// Parse a __builtin_sycl_unique_stable_name expression. Accepts a type-id as
2332 /// a parameter.
2333 ExprResult Parser::ParseSYCLUniqueStableNameExpression() {
2334  assert(Tok.is(tok::kw___builtin_sycl_unique_stable_name) &&
2335  "Not __builtin_sycl_unique_stable_name");
2336 
2337  SourceLocation OpLoc = ConsumeToken();
2338  BalancedDelimiterTracker T(*this, tok::l_paren);
2339 
2340  // __builtin_sycl_unique_stable_name expressions are always parenthesized.
2341  if (T.expectAndConsume(diag::err_expected_lparen_after,
2342  "__builtin_sycl_unique_stable_name"))
2343  return ExprError();
2344 
2345  TypeResult Ty = ParseTypeName();
2346 
2347  if (Ty.isInvalid()) {
2348  T.skipToEnd();
2349  return ExprError();
2350  }
2351 
2352  if (T.consumeClose())
2353  return ExprError();
2354 
2355  return Actions.ActOnSYCLUniqueStableNameExpr(OpLoc, T.getOpenLocation(),
2356  T.getCloseLocation(), Ty.get());
2357 }
2358 
2359 /// Parse a sizeof or alignof expression.
2360 ///
2361 /// \verbatim
2362 /// unary-expression: [C99 6.5.3]
2363 /// 'sizeof' unary-expression
2364 /// 'sizeof' '(' type-name ')'
2365 /// [C++11] 'sizeof' '...' '(' identifier ')'
2366 /// [GNU] '__alignof' unary-expression
2367 /// [GNU] '__alignof' '(' type-name ')'
2368 /// [C11] '_Alignof' '(' type-name ')'
2369 /// [C++11] 'alignof' '(' type-id ')'
2370 /// \endverbatim
2371 ExprResult Parser::ParseUnaryExprOrTypeTraitExpression() {
2372  assert(Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof,
2373  tok::kw__Alignof, tok::kw_vec_step,
2374  tok::kw___builtin_omp_required_simd_align) &&
2375  "Not a sizeof/alignof/vec_step expression!");
2376  Token OpTok = Tok;
2377  ConsumeToken();
2378 
2379  // [C++11] 'sizeof' '...' '(' identifier ')'
2380  if (Tok.is(tok::ellipsis) && OpTok.is(tok::kw_sizeof)) {
2381  SourceLocation EllipsisLoc = ConsumeToken();
2382  SourceLocation LParenLoc, RParenLoc;
2383  IdentifierInfo *Name = nullptr;
2384  SourceLocation NameLoc;
2385  if (Tok.is(tok::l_paren)) {
2386  BalancedDelimiterTracker T(*this, tok::l_paren);
2387  T.consumeOpen();
2388  LParenLoc = T.getOpenLocation();
2389  if (Tok.is(tok::identifier)) {
2390  Name = Tok.getIdentifierInfo();
2391  NameLoc = ConsumeToken();
2392  T.consumeClose();
2393  RParenLoc = T.getCloseLocation();
2394  if (RParenLoc.isInvalid())
2395  RParenLoc = PP.getLocForEndOfToken(NameLoc);
2396  } else {
2397  Diag(Tok, diag::err_expected_parameter_pack);
2398  SkipUntil(tok::r_paren, StopAtSemi);
2399  }
2400  } else if (Tok.is(tok::identifier)) {
2401  Name = Tok.getIdentifierInfo();
2402  NameLoc = ConsumeToken();
2403  LParenLoc = PP.getLocForEndOfToken(EllipsisLoc);
2404  RParenLoc = PP.getLocForEndOfToken(NameLoc);
2405  Diag(LParenLoc, diag::err_paren_sizeof_parameter_pack)
2406  << Name
2407  << FixItHint::CreateInsertion(LParenLoc, "(")
2408  << FixItHint::CreateInsertion(RParenLoc, ")");
2409  } else {
2410  Diag(Tok, diag::err_sizeof_parameter_pack);
2411  }
2412 
2413  if (!Name)
2414  return ExprError();
2415 
2419 
2420  return Actions.ActOnSizeofParameterPackExpr(getCurScope(),
2421  OpTok.getLocation(),
2422  *Name, NameLoc,
2423  RParenLoc);
2424  }
2425 
2426  if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof))
2427  Diag(OpTok, diag::warn_cxx98_compat_alignof);
2428 
2432 
2433  bool isCastExpr;
2434  ParsedType CastTy;
2435  SourceRange CastRange;
2436  ExprResult Operand = ParseExprAfterUnaryExprOrTypeTrait(OpTok,
2437  isCastExpr,
2438  CastTy,
2439  CastRange);
2440 
2441  UnaryExprOrTypeTrait ExprKind = UETT_SizeOf;
2442  if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof))
2443  ExprKind = UETT_AlignOf;
2444  else if (OpTok.is(tok::kw___alignof))
2445  ExprKind = UETT_PreferredAlignOf;
2446  else if (OpTok.is(tok::kw_vec_step))
2447  ExprKind = UETT_VecStep;
2448  else if (OpTok.is(tok::kw___builtin_omp_required_simd_align))
2449  ExprKind = UETT_OpenMPRequiredSimdAlign;
2450 
2451  if (isCastExpr)
2452  return Actions.ActOnUnaryExprOrTypeTraitExpr(OpTok.getLocation(),
2453  ExprKind,
2454  /*IsType=*/true,
2455  CastTy.getAsOpaquePtr(),
2456  CastRange);
2457 
2458  if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof))
2459  Diag(OpTok, diag::ext_alignof_expr) << OpTok.getIdentifierInfo();
2460 
2461  // If we get here, the operand to the sizeof/alignof was an expression.
2462  if (!Operand.isInvalid())
2464  ExprKind,
2465  /*IsType=*/false,
2466  Operand.get(),
2467  CastRange);
2468  return Operand;
2469 }
2470 
2471 /// ParseBuiltinPrimaryExpression
2472 ///
2473 /// \verbatim
2474 /// primary-expression: [C99 6.5.1]
2475 /// [GNU] '__builtin_va_arg' '(' assignment-expression ',' type-name ')'
2476 /// [GNU] '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')'
2477 /// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ','
2478 /// assign-expr ')'
2479 /// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')'
2480 /// [GNU] '__builtin_FILE' '(' ')'
2481 /// [GNU] '__builtin_FUNCTION' '(' ')'
2482 /// [GNU] '__builtin_LINE' '(' ')'
2483 /// [CLANG] '__builtin_COLUMN' '(' ')'
2484 /// [OCL] '__builtin_astype' '(' assignment-expression ',' type-name ')'
2485 ///
2486 /// [GNU] offsetof-member-designator:
2487 /// [GNU] identifier
2488 /// [GNU] offsetof-member-designator '.' identifier
2489 /// [GNU] offsetof-member-designator '[' expression ']'
2490 /// \endverbatim
2491 ExprResult Parser::ParseBuiltinPrimaryExpression() {
2492  ExprResult Res;
2493  const IdentifierInfo *BuiltinII = Tok.getIdentifierInfo();
2494 
2495  tok::TokenKind T = Tok.getKind();
2496  SourceLocation StartLoc = ConsumeToken(); // Eat the builtin identifier.
2497 
2498  // All of these start with an open paren.
2499  if (Tok.isNot(tok::l_paren))
2500  return ExprError(Diag(Tok, diag::err_expected_after) << BuiltinII
2501  << tok::l_paren);
2502 
2503  BalancedDelimiterTracker PT(*this, tok::l_paren);
2504  PT.consumeOpen();
2505 
2506  // TODO: Build AST.
2507 
2508  switch (T) {
2509  default: llvm_unreachable("Not a builtin primary expression!");
2510  case tok::kw___builtin_va_arg: {
2512 
2513  if (ExpectAndConsume(tok::comma)) {
2514  SkipUntil(tok::r_paren, StopAtSemi);
2515  Expr = ExprError();
2516  }
2517 
2518  TypeResult Ty = ParseTypeName();
2519 
2520  if (Tok.isNot(tok::r_paren)) {
2521  Diag(Tok, diag::err_expected) << tok::r_paren;
2522  Expr = ExprError();
2523  }
2524 
2525  if (Expr.isInvalid() || Ty.isInvalid())
2526  Res = ExprError();
2527  else
2528  Res = Actions.ActOnVAArg(StartLoc, Expr.get(), Ty.get(), ConsumeParen());
2529  break;
2530  }
2531  case tok::kw___builtin_offsetof: {
2533  TypeResult Ty = ParseTypeName();
2534  if (Ty.isInvalid()) {
2535  SkipUntil(tok::r_paren, StopAtSemi);
2536  return ExprError();
2537  }
2538 
2539  if (ExpectAndConsume(tok::comma)) {
2540  SkipUntil(tok::r_paren, StopAtSemi);
2541  return ExprError();
2542  }
2543 
2544  // We must have at least one identifier here.
2545  if (Tok.isNot(tok::identifier)) {
2546  Diag(Tok, diag::err_expected) << tok::identifier;
2547  SkipUntil(tok::r_paren, StopAtSemi);
2548  return ExprError();
2549  }
2550 
2551  // Keep track of the various subcomponents we see.
2553 
2554  Comps.push_back(Sema::OffsetOfComponent());
2555  Comps.back().isBrackets = false;
2556  Comps.back().U.IdentInfo = Tok.getIdentifierInfo();
2557  Comps.back().LocStart = Comps.back().LocEnd = ConsumeToken();
2558 
2559  // FIXME: This loop leaks the index expressions on error.
2560  while (1) {
2561  if (Tok.is(tok::period)) {
2562  // offsetof-member-designator: offsetof-member-designator '.' identifier
2563  Comps.push_back(Sema::OffsetOfComponent());
2564  Comps.back().isBrackets = false;
2565  Comps.back().LocStart = ConsumeToken();
2566 
2567  if (Tok.isNot(tok::identifier)) {
2568  Diag(Tok, diag::err_expected) << tok::identifier;
2569  SkipUntil(tok::r_paren, StopAtSemi);
2570  return ExprError();
2571  }
2572  Comps.back().U.IdentInfo = Tok.getIdentifierInfo();
2573  Comps.back().LocEnd = ConsumeToken();
2574 
2575  } else if (Tok.is(tok::l_square)) {
2576  if (CheckProhibitedCXX11Attribute())
2577  return ExprError();
2578 
2579  // offsetof-member-designator: offsetof-member-design '[' expression ']'
2580  Comps.push_back(Sema::OffsetOfComponent());
2581  Comps.back().isBrackets = true;
2582  BalancedDelimiterTracker ST(*this, tok::l_square);
2583  ST.consumeOpen();
2584  Comps.back().LocStart = ST.getOpenLocation();
2585  Res = ParseExpression();
2586  if (Res.isInvalid()) {
2587  SkipUntil(tok::r_paren, StopAtSemi);
2588  return Res;
2589  }
2590  Comps.back().U.E = Res.get();
2591 
2592  ST.consumeClose();
2593  Comps.back().LocEnd = ST.getCloseLocation();
2594  } else {
2595  if (Tok.isNot(tok::r_paren)) {
2596  PT.consumeClose();
2597  Res = ExprError();
2598  } else if (Ty.isInvalid()) {
2599  Res = ExprError();
2600  } else {
2601  PT.consumeClose();
2602  Res = Actions.ActOnBuiltinOffsetOf(getCurScope(), StartLoc, TypeLoc,
2603  Ty.get(), Comps,
2604  PT.getCloseLocation());
2605  }
2606  break;
2607  }
2608  }
2609  break;
2610  }
2611  case tok::kw___builtin_choose_expr: {
2613  if (Cond.isInvalid()) {
2614  SkipUntil(tok::r_paren, StopAtSemi);
2615  return Cond;
2616  }
2617  if (ExpectAndConsume(tok::comma)) {
2618  SkipUntil(tok::r_paren, StopAtSemi);
2619  return ExprError();
2620  }
2621 
2623  if (Expr1.isInvalid()) {
2624  SkipUntil(tok::r_paren, StopAtSemi);
2625  return Expr1;
2626  }
2627  if (ExpectAndConsume(tok::comma)) {
2628  SkipUntil(tok::r_paren, StopAtSemi);
2629  return ExprError();
2630  }
2631 
2633  if (Expr2.isInvalid()) {
2634  SkipUntil(tok::r_paren, StopAtSemi);
2635  return Expr2;
2636  }
2637  if (Tok.isNot(tok::r_paren)) {
2638  Diag(Tok, diag::err_expected) << tok::r_paren;
2639  return ExprError();
2640  }
2641  Res = Actions.ActOnChooseExpr(StartLoc, Cond.get(), Expr1.get(),
2642  Expr2.get(), ConsumeParen());
2643  break;
2644  }
2645  case tok::kw___builtin_astype: {
2646  // The first argument is an expression to be converted, followed by a comma.
2648  if (Expr.isInvalid()) {
2649  SkipUntil(tok::r_paren, StopAtSemi);
2650  return ExprError();
2651  }
2652 
2653  if (ExpectAndConsume(tok::comma)) {
2654  SkipUntil(tok::r_paren, StopAtSemi);
2655  return ExprError();
2656  }
2657 
2658  // Second argument is the type to bitcast to.
2659  TypeResult DestTy = ParseTypeName();
2660  if (DestTy.isInvalid())
2661  return ExprError();
2662 
2663  // Attempt to consume the r-paren.
2664  if (Tok.isNot(tok::r_paren)) {
2665  Diag(Tok, diag::err_expected) << tok::r_paren;
2666  SkipUntil(tok::r_paren, StopAtSemi);
2667  return ExprError();
2668  }
2669 
2670  Res = Actions.ActOnAsTypeExpr(Expr.get(), DestTy.get(), StartLoc,
2671  ConsumeParen());
2672  break;
2673  }
2674  case tok::kw___builtin_convertvector: {
2675  // The first argument is an expression to be converted, followed by a comma.
2677  if (Expr.isInvalid()) {
2678  SkipUntil(tok::r_paren, StopAtSemi);
2679  return ExprError();
2680  }
2681 
2682  if (ExpectAndConsume(tok::comma)) {
2683  SkipUntil(tok::r_paren, StopAtSemi);
2684  return ExprError();
2685  }
2686 
2687  // Second argument is the type to bitcast to.
2688  TypeResult DestTy = ParseTypeName();
2689  if (DestTy.isInvalid())
2690  return ExprError();
2691 
2692  // Attempt to consume the r-paren.
2693  if (Tok.isNot(tok::r_paren)) {
2694  Diag(Tok, diag::err_expected) << tok::r_paren;
2695  SkipUntil(tok::r_paren, StopAtSemi);
2696  return ExprError();
2697  }
2698 
2699  Res = Actions.ActOnConvertVectorExpr(Expr.get(), DestTy.get(), StartLoc,
2700  ConsumeParen());
2701  break;
2702  }
2703  case tok::kw___builtin_COLUMN:
2704  case tok::kw___builtin_FILE:
2705  case tok::kw___builtin_FUNCTION:
2706  case tok::kw___builtin_LINE: {
2707  // Attempt to consume the r-paren.
2708  if (Tok.isNot(tok::r_paren)) {
2709  Diag(Tok, diag::err_expected) << tok::r_paren;
2710  SkipUntil(tok::r_paren, StopAtSemi);
2711  return ExprError();
2712  }
2714  switch (T) {
2715  case tok::kw___builtin_FILE:
2716  return SourceLocExpr::File;
2717  case tok::kw___builtin_FUNCTION:
2718  return SourceLocExpr::Function;
2719  case tok::kw___builtin_LINE:
2720  return SourceLocExpr::Line;
2721  case tok::kw___builtin_COLUMN:
2722  return SourceLocExpr::Column;
2723  default:
2724  llvm_unreachable("invalid keyword");
2725  }
2726  }();
2727  Res = Actions.ActOnSourceLocExpr(Kind, StartLoc, ConsumeParen());
2728  break;
2729  }
2730  }
2731 
2732  if (Res.isInvalid())
2733  return ExprError();
2734 
2735  // These can be followed by postfix-expr pieces because they are
2736  // primary-expressions.
2737  return ParsePostfixExpressionSuffix(Res.get());
2738 }
2739 
2740 bool Parser::tryParseOpenMPArrayShapingCastPart() {
2741  assert(Tok.is(tok::l_square) && "Expected open bracket");
2742  bool ErrorFound = true;
2743  TentativeParsingAction TPA(*this);
2744  do {
2745  if (Tok.isNot(tok::l_square))
2746  break;
2747  // Consume '['
2748  ConsumeBracket();
2749  // Skip inner expression.
2750  while (!SkipUntil(tok::r_square, tok::annot_pragma_openmp_end,
2752  ;
2753  if (Tok.isNot(tok::r_square))
2754  break;
2755  // Consume ']'
2756  ConsumeBracket();
2757  // Found ')' - done.
2758  if (Tok.is(tok::r_paren)) {
2759  ErrorFound = false;
2760  break;
2761  }
2762  } while (Tok.isNot(tok::annot_pragma_openmp_end));
2763  TPA.Revert();
2764  return !ErrorFound;
2765 }
2766 
2767 /// ParseParenExpression - This parses the unit that starts with a '(' token,
2768 /// based on what is allowed by ExprType. The actual thing parsed is returned
2769 /// in ExprType. If stopIfCastExpr is true, it will only return the parsed type,
2770 /// not the parsed cast-expression.
2771 ///
2772 /// \verbatim
2773 /// primary-expression: [C99 6.5.1]
2774 /// '(' expression ')'
2775 /// [GNU] '(' compound-statement ')' (if !ParenExprOnly)
2776 /// postfix-expression: [C99 6.5.2]
2777 /// '(' type-name ')' '{' initializer-list '}'
2778 /// '(' type-name ')' '{' initializer-list ',' '}'
2779 /// cast-expression: [C99 6.5.4]
2780 /// '(' type-name ')' cast-expression
2781 /// [ARC] bridged-cast-expression
2782 /// [ARC] bridged-cast-expression:
2783 /// (__bridge type-name) cast-expression
2784 /// (__bridge_transfer type-name) cast-expression
2785 /// (__bridge_retained type-name) cast-expression
2786 /// fold-expression: [C++1z]
2787 /// '(' cast-expression fold-operator '...' ')'
2788 /// '(' '...' fold-operator cast-expression ')'
2789 /// '(' cast-expression fold-operator '...'
2790 /// fold-operator cast-expression ')'
2791 /// [OPENMP] Array shaping operation
2792 /// '(' '[' expression ']' { '[' expression ']' } cast-expression
2793 /// \endverbatim
2794 ExprResult
2795 Parser::ParseParenExpression(ParenParseOption &ExprType, bool stopIfCastExpr,
2796  bool isTypeCast, ParsedType &CastTy,
2797  SourceLocation &RParenLoc) {
2798  assert(Tok.is(tok::l_paren) && "Not a paren expr!");
2799  ColonProtectionRAIIObject ColonProtection(*this, false);
2800  BalancedDelimiterTracker T(*this, tok::l_paren);
2801  if (T.consumeOpen())
2802  return ExprError();
2803  SourceLocation OpenLoc = T.getOpenLocation();
2804 
2805  PreferredType.enterParenExpr(Tok.getLocation(), OpenLoc);
2806 
2807  ExprResult Result(true);
2808  bool isAmbiguousTypeId;
2809  CastTy = nullptr;
2810 
2811  if (Tok.is(tok::code_completion)) {
2812  cutOffParsing();
2813  Actions.CodeCompleteExpression(
2814  getCurScope(), PreferredType.get(Tok.getLocation()),
2815  /*IsParenthesized=*/ExprType >= CompoundLiteral);
2816  return ExprError();
2817  }
2818 
2819  // Diagnose use of bridge casts in non-arc mode.
2820  bool BridgeCast = (getLangOpts().ObjC &&
2821  Tok.isOneOf(tok::kw___bridge,
2822  tok::kw___bridge_transfer,
2823  tok::kw___bridge_retained,
2824  tok::kw___bridge_retain));
2825  if (BridgeCast && !getLangOpts().ObjCAutoRefCount) {
2826  if (!TryConsumeToken(tok::kw___bridge)) {
2827  StringRef BridgeCastName = Tok.getName();
2828  SourceLocation BridgeKeywordLoc = ConsumeToken();
2829  if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc))
2830  Diag(BridgeKeywordLoc, diag::warn_arc_bridge_cast_nonarc)
2831  << BridgeCastName
2832  << FixItHint::CreateReplacement(BridgeKeywordLoc, "");
2833  }
2834  BridgeCast = false;
2835  }
2836 
2837  // None of these cases should fall through with an invalid Result
2838  // unless they've already reported an error.
2839  if (ExprType >= CompoundStmt && Tok.is(tok::l_brace)) {
2840  Diag(Tok, diag::ext_gnu_statement_expr);
2841 
2842  checkCompoundToken(OpenLoc, tok::l_paren, CompoundToken::StmtExprBegin);
2843 
2844  if (!getCurScope()->getFnParent() && !getCurScope()->getBlockParent()) {
2845  Result = ExprError(Diag(OpenLoc, diag::err_stmtexpr_file_scope));
2846  } else {
2847  // Find the nearest non-record decl context. Variables declared in a
2848  // statement expression behave as if they were declared in the enclosing
2849  // function, block, or other code construct.
2850  DeclContext *CodeDC = Actions.CurContext;
2851  while (CodeDC->isRecord() || isa<EnumDecl>(CodeDC)) {
2852  CodeDC = CodeDC->getParent();
2853  assert(CodeDC && !CodeDC->isFileContext() &&
2854  "statement expr not in code context");
2855  }
2856  Sema::ContextRAII SavedContext(Actions, CodeDC, /*NewThisContext=*/false);
2857 
2858  Actions.ActOnStartStmtExpr();
2859 
2860  StmtResult Stmt(ParseCompoundStatement(true));
2861  ExprType = CompoundStmt;
2862 
2863  // If the substmt parsed correctly, build the AST node.
2864  if (!Stmt.isInvalid()) {
2865  Result = Actions.ActOnStmtExpr(getCurScope(), OpenLoc, Stmt.get(),
2866  Tok.getLocation());
2867  } else {
2868  Actions.ActOnStmtExprError();
2869  }
2870  }
2871  } else if (ExprType >= CompoundLiteral && BridgeCast) {
2872  tok::TokenKind tokenKind = Tok.getKind();
2873  SourceLocation BridgeKeywordLoc = ConsumeToken();
2874 
2875  // Parse an Objective-C ARC ownership cast expression.
2877  if (tokenKind == tok::kw___bridge)
2878  Kind = OBC_Bridge;
2879  else if (tokenKind == tok::kw___bridge_transfer)
2881  else if (tokenKind == tok::kw___bridge_retained)
2883  else {
2884  // As a hopefully temporary workaround, allow __bridge_retain as
2885  // a synonym for __bridge_retained, but only in system headers.
2886  assert(tokenKind == tok::kw___bridge_retain);
2888  if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc))
2889  Diag(BridgeKeywordLoc, diag::err_arc_bridge_retain)
2890  << FixItHint::CreateReplacement(BridgeKeywordLoc,
2891  "__bridge_retained");
2892  }
2893 
2894  TypeResult Ty = ParseTypeName();
2895  T.consumeClose();
2896  ColonProtection.restore();
2897  RParenLoc = T.getCloseLocation();
2898 
2899  PreferredType.enterTypeCast(Tok.getLocation(), Ty.get().get());
2900  ExprResult SubExpr = ParseCastExpression(AnyCastExpr);
2901 
2902  if (Ty.isInvalid() || SubExpr.isInvalid())
2903  return ExprError();
2904 
2905  return Actions.ActOnObjCBridgedCast(getCurScope(), OpenLoc, Kind,
2906  BridgeKeywordLoc, Ty.get(),
2907  RParenLoc, SubExpr.get());
2908  } else if (ExprType >= CompoundLiteral &&
2909  isTypeIdInParens(isAmbiguousTypeId)) {
2910 
2911  // Otherwise, this is a compound literal expression or cast expression.
2912 
2913  // In C++, if the type-id is ambiguous we disambiguate based on context.
2914  // If stopIfCastExpr is true the context is a typeof/sizeof/alignof
2915  // in which case we should treat it as type-id.
2916  // if stopIfCastExpr is false, we need to determine the context past the
2917  // parens, so we defer to ParseCXXAmbiguousParenExpression for that.
2918  if (isAmbiguousTypeId && !stopIfCastExpr) {
2919  ExprResult res = ParseCXXAmbiguousParenExpression(ExprType, CastTy, T,
2920  ColonProtection);
2921  RParenLoc = T.getCloseLocation();
2922  return res;
2923  }
2924 
2925  // Parse the type declarator.
2926  DeclSpec DS(AttrFactory);
2927  ParseSpecifierQualifierList(DS);
2928  Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName);
2929  ParseDeclarator(DeclaratorInfo);
2930 
2931  // If our type is followed by an identifier and either ':' or ']', then
2932  // this is probably an Objective-C message send where the leading '[' is
2933  // missing. Recover as if that were the case.
2934  if (!DeclaratorInfo.isInvalidType() && Tok.is(tok::identifier) &&
2935  !InMessageExpression && getLangOpts().ObjC &&
2936  (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) {
2937  TypeResult Ty;
2938  {
2939  InMessageExpressionRAIIObject InMessage(*this, false);
2940  Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
2941  }
2942  Result = ParseObjCMessageExpressionBody(SourceLocation(),
2943  SourceLocation(),
2944  Ty.get(), nullptr);
2945  } else {
2946  // Match the ')'.
2947  T.consumeClose();
2948  ColonProtection.restore();
2949  RParenLoc = T.getCloseLocation();
2950  if (Tok.is(tok::l_brace)) {
2951  ExprType = CompoundLiteral;
2952  TypeResult Ty;
2953  {
2954  InMessageExpressionRAIIObject InMessage(*this, false);
2955  Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
2956  }
2957  return ParseCompoundLiteralExpression(Ty.get(), OpenLoc, RParenLoc);
2958  }
2959 
2960  if (Tok.is(tok::l_paren)) {
2961  // This could be OpenCL vector Literals
2962  if (getLangOpts().OpenCL)
2963  {
2964  TypeResult Ty;
2965  {
2966  InMessageExpressionRAIIObject InMessage(*this, false);
2967  Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
2968  }
2969  if(Ty.isInvalid())
2970  {
2971  return ExprError();
2972  }
2973  QualType QT = Ty.get().get().getCanonicalType();
2974  if (QT->isVectorType())
2975  {
2976  // We parsed '(' vector-type-name ')' followed by '('
2977 
2978  // Parse the cast-expression that follows it next.
2979  // isVectorLiteral = true will make sure we don't parse any
2980  // Postfix expression yet
2981  Result = ParseCastExpression(/*isUnaryExpression=*/AnyCastExpr,
2982  /*isAddressOfOperand=*/false,
2983  /*isTypeCast=*/IsTypeCast,
2984  /*isVectorLiteral=*/true);
2985 
2986  if (!Result.isInvalid()) {
2987  Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc,
2988  DeclaratorInfo, CastTy,
2989  RParenLoc, Result.get());
2990  }
2991 
2992  // After we performed the cast we can check for postfix-expr pieces.
2993  if (!Result.isInvalid()) {
2994  Result = ParsePostfixExpressionSuffix(Result);
2995  }
2996 
2997  return Result;
2998  }
2999  }
3000  }
3001 
3002  if (ExprType == CastExpr) {
3003  // We parsed '(' type-name ')' and the thing after it wasn't a '{'.
3004 
3005  if (DeclaratorInfo.isInvalidType())
3006  return ExprError();
3007 
3008  // Note that this doesn't parse the subsequent cast-expression, it just
3009  // returns the parsed type to the callee.
3010  if (stopIfCastExpr) {
3011  TypeResult Ty;
3012  {
3013  InMessageExpressionRAIIObject InMessage(*this, false);
3014  Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
3015  }
3016  CastTy = Ty.get();
3017  return ExprResult();
3018  }
3019 
3020  // Reject the cast of super idiom in ObjC.
3021  if (Tok.is(tok::identifier) && getLangOpts().ObjC &&
3022  Tok.getIdentifierInfo() == Ident_super &&
3023  getCurScope()->isInObjcMethodScope() &&
3024  GetLookAheadToken(1).isNot(tok::period)) {
3025  Diag(Tok.getLocation(), diag::err_illegal_super_cast)
3026  << SourceRange(OpenLoc, RParenLoc);
3027  return ExprError();
3028  }
3029 
3030  PreferredType.enterTypeCast(Tok.getLocation(), CastTy.get());
3031  // Parse the cast-expression that follows it next.
3032  // TODO: For cast expression with CastTy.
3033  Result = ParseCastExpression(/*isUnaryExpression=*/AnyCastExpr,
3034  /*isAddressOfOperand=*/false,
3035  /*isTypeCast=*/IsTypeCast);
3036  if (!Result.isInvalid()) {
3037  Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc,
3038  DeclaratorInfo, CastTy,
3039  RParenLoc, Result.get());
3040  }
3041  return Result;
3042  }
3043 
3044  Diag(Tok, diag::err_expected_lbrace_in_compound_literal);
3045  return ExprError();
3046  }
3047  } else if (ExprType >= FoldExpr && Tok.is(tok::ellipsis) &&
3048  isFoldOperator(NextToken().getKind())) {
3049  ExprType = FoldExpr;
3050  return ParseFoldExpression(ExprResult(), T);
3051  } else if (isTypeCast) {
3052  // Parse the expression-list.
3053  InMessageExpressionRAIIObject InMessage(*this, false);
3054 
3055  ExprVector ArgExprs;
3056  CommaLocsTy CommaLocs;
3057 
3058  if (!ParseSimpleExpressionList(ArgExprs, CommaLocs)) {
3059  // FIXME: If we ever support comma expressions as operands to
3060  // fold-expressions, we'll need to allow multiple ArgExprs here.
3061  if (ExprType >= FoldExpr && ArgExprs.size() == 1 &&
3062  isFoldOperator(Tok.getKind()) && NextToken().is(tok::ellipsis)) {
3063  ExprType = FoldExpr;
3064  return ParseFoldExpression(ArgExprs[0], T);
3065  }
3066 
3067  ExprType = SimpleExpr;
3068  Result = Actions.ActOnParenListExpr(OpenLoc, Tok.getLocation(),
3069  ArgExprs);
3070  }
3071  } else if (getLangOpts().OpenMP >= 50 && OpenMPDirectiveParsing &&
3072  ExprType == CastExpr && Tok.is(tok::l_square) &&
3073  tryParseOpenMPArrayShapingCastPart()) {
3074  bool ErrorFound = false;
3075  SmallVector<Expr *, 4> OMPDimensions;
3076  SmallVector<SourceRange, 4> OMPBracketsRanges;
3077  do {
3078  BalancedDelimiterTracker TS(*this, tok::l_square);
3079  TS.consumeOpen();
3080  ExprResult NumElements =
3082  if (!NumElements.isUsable()) {
3083  ErrorFound = true;
3084  while (!SkipUntil(tok::r_square, tok::r_paren,
3086  ;
3087  }
3088  TS.consumeClose();
3089  OMPDimensions.push_back(NumElements.get());
3090  OMPBracketsRanges.push_back(TS.getRange());
3091  } while (Tok.isNot(tok::r_paren));
3092  // Match the ')'.
3093  T.consumeClose();
3094  RParenLoc = T.getCloseLocation();
3096  if (ErrorFound) {
3097  Result = ExprError();
3098  } else if (!Result.isInvalid()) {
3099  Result = Actions.ActOnOMPArrayShapingExpr(
3100  Result.get(), OpenLoc, RParenLoc, OMPDimensions, OMPBracketsRanges);
3101  }
3102  return Result;
3103  } else {
3104  InMessageExpressionRAIIObject InMessage(*this, false);
3105 
3106  Result = ParseExpression(MaybeTypeCast);
3107  if (!getLangOpts().CPlusPlus && MaybeTypeCast && Result.isUsable()) {
3108  // Correct typos in non-C++ code earlier so that implicit-cast-like
3109  // expressions are parsed correctly.
3110  Result = Actions.CorrectDelayedTyposInExpr(Result);
3111  }
3112 
3113  if (ExprType >= FoldExpr && isFoldOperator(Tok.getKind()) &&
3114  NextToken().is(tok::ellipsis)) {
3115  ExprType = FoldExpr;
3116  return ParseFoldExpression(Result, T);
3117  }
3118  ExprType = SimpleExpr;
3119 
3120  // Don't build a paren expression unless we actually match a ')'.
3121  if (!Result.isInvalid() && Tok.is(tok::r_paren))
3122  Result =
3123  Actions.ActOnParenExpr(OpenLoc, Tok.getLocation(), Result.get());
3124  }
3125 
3126  // Match the ')'.
3127  if (Result.isInvalid()) {
3128  SkipUntil(tok::r_paren, StopAtSemi);
3129  return ExprError();
3130  }
3131 
3132  T.consumeClose();
3133  RParenLoc = T.getCloseLocation();
3134  return Result;
3135 }
3136 
3137 /// ParseCompoundLiteralExpression - We have parsed the parenthesized type-name
3138 /// and we are at the left brace.
3139 ///
3140 /// \verbatim
3141 /// postfix-expression: [C99 6.5.2]
3142 /// '(' type-name ')' '{' initializer-list '}'
3143 /// '(' type-name ')' '{' initializer-list ',' '}'
3144 /// \endverbatim
3145 ExprResult
3146 Parser::ParseCompoundLiteralExpression(ParsedType Ty,
3147  SourceLocation LParenLoc,
3148  SourceLocation RParenLoc) {
3149  assert(Tok.is(tok::l_brace) && "Not a compound literal!");
3150  if (!getLangOpts().C99) // Compound literals don't exist in C90.
3151  Diag(LParenLoc, diag::ext_c99_compound_literal);
3152  PreferredType.enterTypeCast(Tok.getLocation(), Ty.get());
3153  ExprResult Result = ParseInitializer();
3154  if (!Result.isInvalid() && Ty)
3155  return Actions.ActOnCompoundLiteral(LParenLoc, Ty, RParenLoc, Result.get());
3156  return Result;
3157 }
3158 
3159 /// ParseStringLiteralExpression - This handles the various token types that
3160 /// form string literals, and also handles string concatenation [C99 5.1.1.2,
3161 /// translation phase #6].
3162 ///
3163 /// \verbatim
3164 /// primary-expression: [C99 6.5.1]
3165 /// string-literal
3166 /// \verbatim
3167 ExprResult Parser::ParseStringLiteralExpression(bool AllowUserDefinedLiteral) {
3168  assert(isTokenStringLiteral() && "Not a string literal!");
3169 
3170  // String concat. Note that keywords like __func__ and __FUNCTION__ are not
3171  // considered to be strings for concatenation purposes.
3172  SmallVector<Token, 4> StringToks;
3173 
3174  do {
3175  StringToks.push_back(Tok);
3176  ConsumeStringToken();
3177  } while (isTokenStringLiteral());
3178 
3179  // Pass the set of string tokens, ready for concatenation, to the actions.
3180  return Actions.ActOnStringLiteral(StringToks,
3181  AllowUserDefinedLiteral ? getCurScope()
3182  : nullptr);
3183 }
3184 
3185 /// ParseGenericSelectionExpression - Parse a C11 generic-selection
3186 /// [C11 6.5.1.1].
3187 ///
3188 /// \verbatim
3189 /// generic-selection:
3190 /// _Generic ( assignment-expression , generic-assoc-list )
3191 /// generic-assoc-list:
3192 /// generic-association
3193 /// generic-assoc-list , generic-association
3194 /// generic-association:
3195 /// type-name : assignment-expression
3196 /// default : assignment-expression
3197 /// \endverbatim
3198 ExprResult Parser::ParseGenericSelectionExpression() {
3199  assert(Tok.is(tok::kw__Generic) && "_Generic keyword expected");
3200  if (!getLangOpts().C11)
3201  Diag(Tok, diag::ext_c11_feature) << Tok.getName();
3202 
3203  SourceLocation KeyLoc = ConsumeToken();
3204  BalancedDelimiterTracker T(*this, tok::l_paren);
3205  if (T.expectAndConsume())
3206  return ExprError();
3207 
3208  ExprResult ControllingExpr;
3209  {
3210  // C11 6.5.1.1p3 "The controlling expression of a generic selection is
3211  // not evaluated."
3214  ControllingExpr =
3216  if (ControllingExpr.isInvalid()) {
3217  SkipUntil(tok::r_paren, StopAtSemi);
3218  return ExprError();
3219  }
3220  }
3221 
3222  if (ExpectAndConsume(tok::comma)) {
3223  SkipUntil(tok::r_paren, StopAtSemi);
3224  return ExprError();
3225  }
3226 
3227  SourceLocation DefaultLoc;
3228  TypeVector Types;
3229  ExprVector Exprs;
3230  do {
3231  ParsedType Ty;
3232  if (Tok.is(tok::kw_default)) {
3233  // C11 6.5.1.1p2 "A generic selection shall have no more than one default
3234  // generic association."
3235  if (!DefaultLoc.isInvalid()) {
3236  Diag(Tok, diag::err_duplicate_default_assoc);
3237  Diag(DefaultLoc, diag::note_previous_default_assoc);
3238  SkipUntil(tok::r_paren, StopAtSemi);
3239  return ExprError();
3240  }
3241  DefaultLoc = ConsumeToken();
3242  Ty = nullptr;
3243  } else {
3245  TypeResult TR = ParseTypeName();
3246  if (TR.isInvalid()) {
3247  SkipUntil(tok::r_paren, StopAtSemi);
3248  return ExprError();
3249  }
3250  Ty = TR.get();
3251  }
3252  Types.push_back(Ty);
3253 
3254  if (ExpectAndConsume(tok::colon)) {
3255  SkipUntil(tok::r_paren, StopAtSemi);
3256  return ExprError();
3257  }
3258 
3259  // FIXME: These expressions should be parsed in a potentially potentially
3260  // evaluated context.
3261  ExprResult ER(
3263  if (ER.isInvalid()) {
3264  SkipUntil(tok::r_paren, StopAtSemi);
3265  return ExprError();
3266  }
3267  Exprs.push_back(ER.get());
3268  } while (TryConsumeToken(tok::comma));
3269 
3270  T.consumeClose();
3271  if (T.getCloseLocation().isInvalid())
3272  return ExprError();
3273 
3274  return Actions.ActOnGenericSelectionExpr(KeyLoc, DefaultLoc,
3275  T.getCloseLocation(),
3276  ControllingExpr.get(),
3277  Types, Exprs);
3278 }
3279 
3280 /// Parse A C++1z fold-expression after the opening paren and optional
3281 /// left-hand-side expression.
3282 ///
3283 /// \verbatim
3284 /// fold-expression:
3285 /// ( cast-expression fold-operator ... )
3286 /// ( ... fold-operator cast-expression )
3287 /// ( cast-expression fold-operator ... fold-operator cast-expression )
3288 ExprResult Parser::ParseFoldExpression(ExprResult LHS,
3290  if (LHS.isInvalid()) {
3291  T.skipToEnd();
3292  return true;
3293  }
3294 
3295  tok::TokenKind Kind = tok::unknown;
3296  SourceLocation FirstOpLoc;
3297  if (LHS.isUsable()) {
3298  Kind = Tok.getKind();
3299  assert(isFoldOperator(Kind) && "missing fold-operator");
3300  FirstOpLoc = ConsumeToken();
3301  }
3302 
3303  assert(Tok.is(tok::ellipsis) && "not a fold-expression");
3304  SourceLocation EllipsisLoc = ConsumeToken();
3305 
3306  ExprResult RHS;
3307  if (Tok.isNot(tok::r_paren)) {
3308  if (!isFoldOperator(Tok.getKind()))
3309  return Diag(Tok.getLocation(), diag::err_expected_fold_operator);
3310 
3311  if (Kind != tok::unknown && Tok.getKind() != Kind)
3312  Diag(Tok.getLocation(), diag::err_fold_operator_mismatch)
3313  << SourceRange(FirstOpLoc);
3314  Kind = Tok.getKind();
3315  ConsumeToken();
3316 
3317  RHS = ParseExpression();
3318  if (RHS.isInvalid()) {
3319  T.skipToEnd();
3320  return true;
3321  }
3322  }
3323 
3324  Diag(EllipsisLoc, getLangOpts().CPlusPlus17
3325  ? diag::warn_cxx14_compat_fold_expression
3326  : diag::ext_fold_expression);
3327 
3328  T.consumeClose();
3329  return Actions.ActOnCXXFoldExpr(getCurScope(), T.getOpenLocation(), LHS.get(),
3330  Kind, EllipsisLoc, RHS.get(),
3331  T.getCloseLocation());
3332 }
3333 
3334 /// ParseExpressionList - Used for C/C++ (argument-)expression-list.
3335 ///
3336 /// \verbatim
3337 /// argument-expression-list:
3338 /// assignment-expression
3339 /// argument-expression-list , assignment-expression
3340 ///
3341 /// [C++] expression-list:
3342 /// [C++] assignment-expression
3343 /// [C++] expression-list , assignment-expression
3344 ///
3345 /// [C++0x] expression-list:
3346 /// [C++0x] initializer-list
3347 ///
3348 /// [C++0x] initializer-list
3349 /// [C++0x] initializer-clause ...[opt]
3350 /// [C++0x] initializer-list , initializer-clause ...[opt]
3351 ///
3352 /// [C++0x] initializer-clause:
3353 /// [C++0x] assignment-expression
3354 /// [C++0x] braced-init-list
3355 /// \endverbatim
3356 bool Parser::ParseExpressionList(SmallVectorImpl<Expr *> &Exprs,
3358  llvm::function_ref<void()> ExpressionStarts) {
3359  bool SawError = false;
3360  while (1) {
3361  if (ExpressionStarts)
3362  ExpressionStarts();
3363 
3364  ExprResult Expr;
3365  if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
3366  Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
3367  Expr = ParseBraceInitializer();
3368  } else
3370 
3371  if (Tok.is(tok::ellipsis))
3372  Expr = Actions.ActOnPackExpansion(Expr.get(), ConsumeToken());
3373  else if (Tok.is(tok::code_completion)) {
3374  // There's nothing to suggest in here as we parsed a full expression.
3375  // Instead fail and propogate the error since caller might have something
3376  // the suggest, e.g. signature help in function call. Note that this is
3377  // performed before pushing the \p Expr, so that signature help can report
3378  // current argument correctly.
3379  SawError = true;
3380  cutOffParsing();
3381  break;
3382  }
3383  if (Expr.isInvalid()) {
3384  SkipUntil(tok::comma, tok::r_paren, StopBeforeMatch);
3385  SawError = true;
3386  } else {
3387  Exprs.push_back(Expr.get());
3388  }
3389 
3390  if (Tok.isNot(tok::comma))
3391  break;
3392  // Move to the next argument, remember where the comma was.
3393  Token Comma = Tok;
3394  CommaLocs.push_back(ConsumeToken());
3395 
3396  checkPotentialAngleBracketDelimiter(Comma);
3397  }
3398  if (SawError) {
3399  // Ensure typos get diagnosed when errors were encountered while parsing the
3400  // expression list.
3401  for (auto &E : Exprs) {
3403  if (Expr.isUsable()) E = Expr.get();
3404  }
3405  }
3406  return SawError;
3407 }
3408 
3409 /// ParseSimpleExpressionList - A simple comma-separated list of expressions,
3410 /// used for misc language extensions.
3411 ///
3412 /// \verbatim
3413 /// simple-expression-list:
3414 /// assignment-expression
3415 /// simple-expression-list , assignment-expression
3416 /// \endverbatim
3417 bool
3418 Parser::ParseSimpleExpressionList(SmallVectorImpl<Expr*> &Exprs,
3419  SmallVectorImpl<SourceLocation> &CommaLocs) {
3420  while (1) {
3422  if (Expr.isInvalid())
3423  return true;
3424 
3425  Exprs.push_back(Expr.get());
3426 
3427  if (Tok.isNot(tok::comma))
3428  return false;
3429 
3430  // Move to the next argument, remember where the comma was.
3431  Token Comma = Tok;
3432  CommaLocs.push_back(ConsumeToken());
3433 
3434  checkPotentialAngleBracketDelimiter(Comma);
3435  }
3436 }
3437 
3438 /// ParseBlockId - Parse a block-id, which roughly looks like int (int x).
3439 ///
3440 /// \verbatim
3441 /// [clang] block-id:
3442 /// [clang] specifier-qualifier-list block-declarator
3443 /// \endverbatim
3444 void Parser::ParseBlockId(SourceLocation CaretLoc) {
3445  if (Tok.is(tok::code_completion)) {
3446  cutOffParsing();
3448  return;
3449  }
3450 
3451  // Parse the specifier-qualifier-list piece.
3452  DeclSpec DS(AttrFactory);
3453  ParseSpecifierQualifierList(DS);
3454 
3455  // Parse the block-declarator.
3456  Declarator DeclaratorInfo(DS, DeclaratorContext::BlockLiteral);
3457  DeclaratorInfo.setFunctionDefinitionKind(FunctionDefinitionKind::Definition);
3458  ParseDeclarator(DeclaratorInfo);
3459 
3460  MaybeParseGNUAttributes(DeclaratorInfo);
3461 
3462  // Inform sema that we are starting a block.
3463  Actions.ActOnBlockArguments(CaretLoc, DeclaratorInfo, getCurScope());
3464 }
3465 
3466 /// ParseBlockLiteralExpression - Parse a block literal, which roughly looks
3467 /// like ^(int x){ return x+1; }
3468 ///
3469 /// \verbatim
3470 /// block-literal:
3471 /// [clang] '^' block-args[opt] compound-statement
3472 /// [clang] '^' block-id compound-statement
3473 /// [clang] block-args:
3474 /// [clang] '(' parameter-list ')'
3475 /// \endverbatim
3476 ExprResult Parser::ParseBlockLiteralExpression() {
3477  assert(Tok.is(tok::caret) && "block literal starts with ^");
3478  SourceLocation CaretLoc = ConsumeToken();
3479 
3480  PrettyStackTraceLoc CrashInfo(PP.getSourceManager(), CaretLoc,
3481  "block literal parsing");
3482 
3483  // Enter a scope to hold everything within the block. This includes the
3484  // argument decls, decls within the compound expression, etc. This also
3485  // allows determining whether a variable reference inside the block is
3486  // within or outside of the block.
3487  ParseScope BlockScope(this, Scope::BlockScope | Scope::FnScope |
3489 
3490  // Inform sema that we are starting a block.
3491  Actions.ActOnBlockStart(CaretLoc, getCurScope());
3492 
3493  // Parse the return type if present.
3494  DeclSpec DS(AttrFactory);
3496  ParamInfo.setFunctionDefinitionKind(FunctionDefinitionKind::Definition);
3497  // FIXME: Since the return type isn't actually parsed, it can't be used to
3498  // fill ParamInfo with an initial valid range, so do it manually.
3499  ParamInfo.SetSourceRange(SourceRange(Tok.getLocation(), Tok.getLocation()));
3500 
3501  // If this block has arguments, parse them. There is no ambiguity here with
3502  // the expression case, because the expression case requires a parameter list.
3503  if (Tok.is(tok::l_paren)) {
3504  ParseParenDeclarator(ParamInfo);
3505  // Parse the pieces after the identifier as if we had "int(...)".
3506  // SetIdentifier sets the source range end, but in this case we're past
3507  // that location.
3508  SourceLocation Tmp = ParamInfo.getSourceRange().getEnd();
3509  ParamInfo.SetIdentifier(nullptr, CaretLoc);
3510  ParamInfo.SetRangeEnd(Tmp);
3511  if (ParamInfo.isInvalidType()) {
3512  // If there was an error parsing the arguments, they may have
3513  // tried to use ^(x+y) which requires an argument list. Just
3514  // skip the whole block literal.
3515  Actions.ActOnBlockError(CaretLoc, getCurScope());
3516  return ExprError();
3517  }
3518 
3519  MaybeParseGNUAttributes(ParamInfo);
3520 
3521  // Inform sema that we are starting a block.
3522  Actions.ActOnBlockArguments(CaretLoc, ParamInfo, getCurScope());
3523  } else if (!Tok.is(tok::l_brace)) {
3524  ParseBlockId(CaretLoc);
3525  } else {
3526  // Otherwise, pretend we saw (void).
3527  SourceLocation NoLoc;
3528  ParamInfo.AddTypeInfo(
3529  DeclaratorChunk::getFunction(/*HasProto=*/true,
3530  /*IsAmbiguous=*/false,
3531  /*RParenLoc=*/NoLoc,
3532  /*ArgInfo=*/nullptr,
3533  /*NumParams=*/0,
3534  /*EllipsisLoc=*/NoLoc,
3535  /*RParenLoc=*/NoLoc,
3536  /*RefQualifierIsLvalueRef=*/true,
3537  /*RefQualifierLoc=*/NoLoc,
3538  /*MutableLoc=*/NoLoc, EST_None,
3539  /*ESpecRange=*/SourceRange(),
3540  /*Exceptions=*/nullptr,
3541  /*ExceptionRanges=*/nullptr,
3542  /*NumExceptions=*/0,
3543  /*NoexceptExpr=*/nullptr,
3544  /*ExceptionSpecTokens=*/nullptr,
3545  /*DeclsInPrototype=*/None, CaretLoc,
3546  CaretLoc, ParamInfo),
3547  CaretLoc);
3548 
3549  MaybeParseGNUAttributes(ParamInfo);
3550 
3551  // Inform sema that we are starting a block.
3552  Actions.ActOnBlockArguments(CaretLoc, ParamInfo, getCurScope());
3553  }
3554 
3555 
3556  ExprResult Result(true);
3557  if (!Tok.is(tok::l_brace)) {
3558  // Saw something like: ^expr
3559  Diag(Tok, diag::err_expected_expression);
3560  Actions.ActOnBlockError(CaretLoc, getCurScope());
3561  return ExprError();
3562  }
3563 
3564  StmtResult Stmt(ParseCompoundStatementBody());
3565  BlockScope.Exit();
3566  if (!Stmt.isInvalid())
3567  Result = Actions.ActOnBlockStmtExpr(CaretLoc, Stmt.get(), getCurScope());
3568  else
3569  Actions.ActOnBlockError(CaretLoc, getCurScope());
3570  return Result;
3571 }
3572 
3573 /// ParseObjCBoolLiteral - This handles the objective-c Boolean literals.
3574 ///
3575 /// '__objc_yes'
3576 /// '__objc_no'
3577 ExprResult Parser::ParseObjCBoolLiteral() {
3578  tok::TokenKind Kind = Tok.getKind();
3579  return Actions.ActOnObjCBoolLiteral(ConsumeToken(), Kind);
3580 }
3581 
3582 /// Validate availability spec list, emitting diagnostics if necessary. Returns
3583 /// true if invalid.
3585  ArrayRef<AvailabilitySpec> AvailSpecs) {
3586  llvm::SmallSet<StringRef, 4> Platforms;
3587  bool HasOtherPlatformSpec = false;
3588  bool Valid = true;
3589  for (const auto &Spec : AvailSpecs) {
3590  if (Spec.isOtherPlatformSpec()) {
3591  if (HasOtherPlatformSpec) {
3592  P.Diag(Spec.getBeginLoc(), diag::err_availability_query_repeated_star);
3593  Valid = false;
3594  }
3595 
3596  HasOtherPlatformSpec = true;
3597  continue;
3598  }
3599 
3600  bool Inserted = Platforms.insert(Spec.getPlatform()).second;
3601  if (!Inserted) {
3602  // Rule out multiple version specs referring to the same platform.
3603  // For example, we emit an error for:
3604  // @available(macos 10.10, macos 10.11, *)
3605  StringRef Platform = Spec.getPlatform();
3606  P.Diag(Spec.getBeginLoc(), diag::err_availability_query_repeated_platform)
3607  << Spec.getEndLoc() << Platform;
3608  Valid = false;
3609  }
3610  }
3611 
3612  if (!HasOtherPlatformSpec) {
3613  SourceLocation InsertWildcardLoc = AvailSpecs.back().getEndLoc();
3614  P.Diag(InsertWildcardLoc, diag::err_availability_query_wildcard_required)
3615  << FixItHint::CreateInsertion(InsertWildcardLoc, ", *");
3616  return true;
3617  }
3618 
3619  return !Valid;
3620 }
3621 
3622 /// Parse availability query specification.
3623 ///
3624 /// availability-spec:
3625 /// '*'
3626 /// identifier version-tuple
3627 Optional<AvailabilitySpec> Parser::ParseAvailabilitySpec() {
3628  if (Tok.is(tok::star)) {
3629  return AvailabilitySpec(ConsumeToken());
3630  } else {
3631  // Parse the platform name.
3632  if (Tok.is(tok::code_completion)) {
3633  cutOffParsing();
3635  return None;
3636  }
3637  if (Tok.isNot(tok::identifier)) {
3638  Diag(Tok, diag::err_avail_query_expected_platform_name);
3639  return None;
3640  }
3641 
3642  IdentifierLoc *PlatformIdentifier = ParseIdentifierLoc();
3643  SourceRange VersionRange;
3644  VersionTuple Version = ParseVersionTuple(VersionRange);
3645 
3646  if (Version.empty())
3647  return None;
3648 
3649  StringRef GivenPlatform = PlatformIdentifier->Ident->getName();
3650  StringRef Platform =
3651  AvailabilityAttr::canonicalizePlatformName(GivenPlatform);
3652 
3653  if (AvailabilityAttr::getPrettyPlatformName(Platform).empty()) {
3654  Diag(PlatformIdentifier->Loc,
3655  diag::err_avail_query_unrecognized_platform_name)
3656  << GivenPlatform;
3657  return None;
3658  }
3659 
3660  return AvailabilitySpec(Version, Platform, PlatformIdentifier->Loc,
3661  VersionRange.getEnd());
3662  }
3663 }
3664 
3665 ExprResult Parser::ParseAvailabilityCheckExpr(SourceLocation BeginLoc) {
3666  assert(Tok.is(tok::kw___builtin_available) ||
3667  Tok.isObjCAtKeyword(tok::objc_available));
3668 
3669  // Eat the available or __builtin_available.
3670  ConsumeToken();
3671 
3672  BalancedDelimiterTracker Parens(*this, tok::l_paren);
3673  if (Parens.expectAndConsume())
3674  return ExprError();
3675 
3677  bool HasError = false;
3678  while (true) {
3679  Optional<AvailabilitySpec> Spec = ParseAvailabilitySpec();
3680  if (!Spec)
3681  HasError = true;
3682  else
3683  AvailSpecs.push_back(*Spec);
3684 
3685  if (!TryConsumeToken(tok::comma))
3686  break;
3687  }
3688 
3689  if (HasError) {
3690  SkipUntil(tok::r_paren, StopAtSemi);
3691  return ExprError();
3692  }
3693 
3694  CheckAvailabilitySpecList(*this, AvailSpecs);
3695 
3696  if (Parens.consumeClose())
3697  return ExprError();
3698 
3699  return Actions.ActOnObjCAvailabilityCheckExpr(AvailSpecs, BeginLoc,
3700  Parens.getCloseLocation());
3701 }
clang::OpenCL
@ OpenCL
Definition: LangStandard.h:58
clang::UnqualifiedId
Represents a C++ unqualified-id that has been parsed.
Definition: DeclSpec.h:951
clang::Sema::CurContext
DeclContext * CurContext
CurContext - This is the current declaration context of parsing.
Definition: Sema.h:422
clang::prec::Comma
@ Comma
Definition: OperatorPrecedence.h:28
clang::ObjCBridgeCastKind
ObjCBridgeCastKind
The kind of bridging performed by the Objective-C bridge cast.
Definition: OperationKinds.h:36
clang::prec::Conditional
@ Conditional
Definition: OperatorPrecedence.h:30
clang::OpaquePtr::get
PtrTy get() const
Definition: Ownership.h:80
clang::Parser::TypeCastState
TypeCastState
TypeCastState - State whether an expression is or may be a type cast.
Definition: Parser.h:1731
clang::CorrectionCandidateCallback::ValidateCandidate
virtual bool ValidateCandidate(const TypoCorrection &candidate)
Simple predicate used by the default RankCandidate to determine whether to return an edit distance of...
Definition: SemaLookup.cpp:5206
clang::IdentifierLoc::Ident
IdentifierInfo * Ident
Definition: ParsedAttr.h:189
clang::PreferredTypeBuilder::enterBinary
void enterBinary(Sema &S, SourceLocation Tok, Expr *LHS, tok::TokenKind Op)
Definition: SemaCodeComplete.cpp:554
clang::Sema::ActOnNoexceptExpr
ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, Expr *Operand, SourceLocation RParen)
Definition: SemaExprCXX.cpp:7868
clang::prec::LogicalAnd
@ LogicalAnd
Definition: OperatorPrecedence.h:32
clang::TemplateIdAnnotation
Information about a template-id annotation token.
Definition: ParsedTemplate.h:150
clang::Scope::FnScope
@ FnScope
This indicates that the scope corresponds to a function, which means that labels are set here.
Definition: Scope.h:47
clang::SourceLocExpr::IdentKind
IdentKind
Definition: Expr.h:4683
clang::Sema::ProduceCallSignatureHelp
QualType ProduceCallSignatureHelp(Scope *S, Expr *Fn, ArrayRef< Expr * > Args, SourceLocation OpenParLoc)
Determines the preferred type of the current function argument, by examining the signatures of all po...
Definition: SemaCodeComplete.cpp:5875
clang::Token::isObjCAtKeyword
bool isObjCAtKeyword(tok::ObjCKeywordKind objcKey) const
Return true if we have an ObjC keyword identifier.
Definition: Lexer.cpp:57
clang::Sema::ActOnParenListExpr
ExprResult ActOnParenListExpr(SourceLocation L, SourceLocation R, MultiExprArg Val)
Definition: SemaExpr.cpp:7809
clang::SourceRange
A trivial tuple used to represent a source range.
Definition: SourceLocation.h:210
clang::Sema::ActOnGNUNullExpr
ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc)
Definition: SemaExpr.cpp:15933
clang::DeclContext
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1347
clang::TypoCorrection
Simple class containing the result of Sema::CorrectTypo.
Definition: TypoCorrection.h:42
clang::FixItHint::CreateInsertion
static FixItHint CreateInsertion(SourceLocation InsertionLoc, StringRef Code, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code string at a specific location.
Definition: Diagnostic.h:96
clang::InMessageExpressionRAIIObject
Definition: RAIIObjectsForParser.h:325
clang::Parser::SkipUntil
bool SkipUntil(tok::TokenKind T, SkipUntilFlags Flags=static_cast< SkipUntilFlags >(0))
SkipUntil - Read tokens until we get to the specified token, then consume it (unless StopBeforeMatch ...
Definition: Parser.h:1205
clang::Sema::getASTContext
ASTContext & getASTContext() const
Definition: Sema.h:1591
clang::SourceLocExpr::Column
@ Column
Definition: Expr.h:4683
clang::TST_typename
@ TST_typename
Definition: Specifiers.h:81
clang::Sema::ActOnIdExpression
ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, SourceLocation TemplateKWLoc, UnqualifiedId &Id, bool HasTrailingLParen, bool IsAddressOfOperand, CorrectionCandidateCallback *CCC=nullptr, bool IsInlineAsmIdentifier=false, Token *KeywordReplacement=nullptr)
Definition: SemaExpr.cpp:2417
llvm::SmallVector
Definition: LLVM.h:38
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:86
clang::Sema::ActOnBinOp
ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr)
Definition: SemaExpr.cpp:14591
clang::Sema::ActOnStartCXXMemberReference
ExprResult ActOnStartCXXMemberReference(Scope *S, Expr *Base, SourceLocation OpLoc, tok::TokenKind OpKind, ParsedType &ObjectType, bool &MayBePseudoDestructor)
Definition: SemaExprCXX.cpp:7283
clang::SourceLocation::getLocWithOffset
SourceLocation getLocWithOffset(IntTy Offset) const
Return a source location with the specified offset from this SourceLocation.
Definition: SourceLocation.h:134
clang::NamedDecl
This represents a decl that may have a name.
Definition: Decl.h:249
clang::SourceRange::getBegin
SourceLocation getBegin() const
Definition: SourceLocation.h:219
clang::Scope::BlockScope
@ BlockScope
This is a scope that corresponds to a block/closure object.
Definition: Scope.h:71
clang::Stmt::getSourceRange
SourceRange getSourceRange() const LLVM_READONLY
SourceLocation tokens are not useful in isolation - they are low level value objects created/interpre...
Definition: Stmt.cpp:324
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:673
clang::Sema::ActOnAsTypeExpr
ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, SourceLocation BuiltinLoc, SourceLocation RParenLoc)
__builtin_astype(...)
Definition: SemaExpr.cpp:6626
clang::EST_None
@ EST_None
no exception specification
Definition: ExceptionSpecificationType.h:21
AttributeLangSupport::C
@ C
Definition: SemaDeclAttr.cpp:54
clang::Token::getIdentifierInfo
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:179
clang::OBC_BridgeRetained
@ OBC_BridgeRetained
Bridging via __bridge_retain, which makes an ARC object available as a +1 C pointer.
Definition: OperationKinds.h:45
TypoCorrection.h
clang::PreferredTypeBuilder::enterSubscript
void enterSubscript(Sema &S, SourceLocation Tok, Expr *LHS)
Definition: SemaCodeComplete.cpp:585
clang::Sema::ActOnMemberAccessExpr
ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, SourceLocation OpLoc, tok::TokenKind OpKind, CXXScopeSpec &SS, SourceLocation TemplateKWLoc, UnqualifiedId &Member, Decl *ObjCImpDecl)
The main callback when the parser finds something like expression .
Definition: SemaExprMember.cpp:1681
clang::Sema::getTypeName
ParsedType getTypeName(const IdentifierInfo &II, SourceLocation NameLoc, Scope *S, CXXScopeSpec *SS=nullptr, bool isClassName=false, bool HasTrailingDot=false, ParsedType ObjectType=nullptr, bool IsCtorOrDtorName=false, bool WantNontrivialTypeSourceInfo=false, bool IsClassTemplateDeductionContext=true, IdentifierInfo **CorrectedII=nullptr)
If the identifier refers to a type name within this scope, return the declaration of that type.
Definition: SemaDecl.cpp:285
clang::SourceLocExpr::File
@ File
Definition: Expr.h:4683
clang::Token::isAtStartOfLine
bool isAtStartOfLine() const
isAtStartOfLine - Return true if this token is at the start of a line.
Definition: Token.h:268
clang::C99
@ C99
Definition: LangStandard.h:44
clang::Parser
Parser - This implements a parser for the C family of languages.
Definition: Parser.h:60
clang::Parser::ParseAssignmentExpression
ExprResult ParseAssignmentExpression(TypeCastState isTypeCast=NotTypeCast)
Parse an expr that doesn't include (top-level) commas.
Definition: ParseExpr.cpp:160
clang::Sema::ActOnCastExpr
ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, Declarator &D, ParsedType &Ty, SourceLocation RParenLoc, Expr *CastExpr)
Definition: SemaExpr.cpp:7633
llvm::Optional
Definition: LLVM.h:40
clang::ActionResult::isUnset
bool isUnset() const
Definition: Ownership.h:167
RAIIObjectsForParser.h
clang::ColonProtectionRAIIObject
ColonProtectionRAIIObject - This sets the Parser::ColonIsSacred bool and restores it when destroyed.
Definition: RAIIObjectsForParser.h:270
clang::prec::Assignment
@ Assignment
Definition: OperatorPrecedence.h:29
DeclSpec.h
clang::Preprocessor::EnterToken
void EnterToken(const Token &Tok, bool IsReinject)
Enters a token in the token stream to be lexed next.
Definition: Preprocessor.h:1558
clang::Sema::ActOnCXXNullPtrLiteral
ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc)
ActOnCXXNullPtrLiteral - Parse 'nullptr'.
Definition: SemaExprCXX.cpp:814
clang::Sema::ActOnPostfixUnaryOp
ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, tok::TokenKind Kind, Expr *Input)
Definition: SemaExpr.cpp:4605
clang::tooling::X
static ToolExecutorPluginRegistry::Add< AllTUsToolExecutorPlugin > X("all-TUs", "Runs FrontendActions on all TUs in the compilation database. " "Tool results are stored in memory.")
clang::CXXScopeSpec
Represents a C++ nested-name-specifier or a global scope specifier.
Definition: DeclSpec.h:64
clang::Sema::isSimpleTypeSpecifier
bool isSimpleTypeSpecifier(tok::TokenKind Kind) const
Determine whether the token kind starts a simple-type-specifier.
Definition: SemaDecl.cpp:125
clang::Sema::ActOnStmtExpr
ExprResult ActOnStmtExpr(Scope *S, SourceLocation LPLoc, Stmt *SubStmt, SourceLocation RPLoc)
Definition: SemaExpr.cpp:15134
clang::Sema::ExprEvalContexts
SmallVector< ExpressionEvaluationContextRecord, 8 > ExprEvalContexts
A stack of expression evaluation contexts.
Definition: Sema.h:1337
clang::Token
Token - This structure provides full information about a lexed token.
Definition: Token.h:34
clang::BalancedDelimiterTracker
RAII class that helps handle the parsing of an open/close delimiter pair, such as braces { ....
Definition: RAIIObjectsForParser.h:385
clang::Sema::OffsetOfComponent
Definition: Sema.h:5586
clang::Preprocessor::isCodeCompletionReached
bool isCodeCompletionReached() const
Returns true if code-completion is enabled and we have hit the code-completion point.
Definition: Preprocessor.h:1684
clang::Sema::ActOnBlockError
void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope)
ActOnBlockError - If there is an error parsing a block, this callback is invoked to pop the informati...
Definition: SemaExpr.cpp:15577
clang::IdentifierLoc::Loc
SourceLocation Loc
Definition: ParsedAttr.h:188
clang::DeclaratorChunk::getFunction
static DeclaratorChunk getFunction(bool HasProto, bool IsAmbiguous, SourceLocation LParenLoc, ParamInfo *Params, unsigned NumParams, SourceLocation EllipsisLoc, SourceLocation RParenLoc, bool RefQualifierIsLvalueRef, SourceLocation RefQualifierLoc, SourceLocation MutableLoc, ExceptionSpecificationType ESpecType, SourceRange ESpecRange, ParsedType *Exceptions, SourceRange *ExceptionRanges, unsigned NumExceptions, Expr *NoexceptExpr, CachedTokens *ExceptionSpecTokens, ArrayRef< NamedDecl * > DeclsInPrototype, SourceLocation LocalRangeBegin, SourceLocation LocalRangeEnd, Declarator &TheDeclarator, TypeResult TrailingReturnType=TypeResult(), SourceLocation TrailingReturnTypeLoc=SourceLocation(), DeclSpec *MethodQualifiers=nullptr)
DeclaratorChunk::getFunction - Return a DeclaratorChunk for a function.
Definition: DeclSpec.cpp:160
clang::SourceManager
This class handles loading and caching of source files into memory.
Definition: SourceManager.h:626
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1490
clang::ExprError
ExprResult ExprError()
Definition: Ownership.h:278
clang::Sema::ActOnStringLiteral
ExprResult ActOnStringLiteral(ArrayRef< Token > StringToks, Scope *UDLScope=nullptr)
ActOnStringLiteral - The specified tokens were lexed as pasted string fragments (e....
Definition: SemaExpr.cpp:1789
clang::Parser::ParseConstraintExpression
ExprResult ParseConstraintExpression()
Parse a constraint-expression.
Definition: ParseExpr.cpp:235
clang::CPlusPlus17
@ CPlusPlus17
Definition: LangStandard.h:51
clang::Sema::ActOnBlockArguments
void ActOnBlockArguments(SourceLocation CaretLoc, Declarator &ParamInfo, Scope *CurScope)
ActOnBlockArguments - This callback allows processing of block arguments.
Definition: SemaExpr.cpp:15459
clang::ExprEmpty
ExprResult ExprEmpty()
Definition: Ownership.h:289
clang::prec::Unknown
@ Unknown
Definition: OperatorPrecedence.h:27
clang::Parser::NotTypeCast
@ NotTypeCast
Definition: Parser.h:1732
clang::Sema::ActOnObjCAvailabilityCheckExpr
ExprResult ActOnObjCAvailabilityCheckExpr(llvm::ArrayRef< AvailabilitySpec > AvailSpecs, SourceLocation AtLoc, SourceLocation RParen)
Definition: SemaExpr.cpp:19883
clang::CompoundStmt
CompoundStmt - This represents a group of statements like { stmt stmt }.
Definition: Stmt.h:1404
clang::Sema::ActOnClassPropertyRefExpr
ExprResult ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, IdentifierInfo &propertyName, SourceLocation receiverNameLoc, SourceLocation propertyNameLoc)
Definition: SemaExprObjC.cpp:2159
clang::Sema::ActOnArraySubscriptExpr
ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, Expr *Idx, SourceLocation RLoc)
Definition: SemaExpr.cpp:4647
clang::SourceLocExpr::Line
@ Line
Definition: Expr.h:4683
clang::Sema::ActOnObjCBridgedCast
ExprResult ActOnObjCBridgedCast(Scope *S, SourceLocation LParenLoc, ObjCBridgeCastKind Kind, SourceLocation BridgeKeywordLoc, ParsedType Type, SourceLocation RParenLoc, Expr *SubExpr)
Definition: SemaExprObjC.cpp:4751
clang::Sema::ActOnTypeName
TypeResult ActOnTypeName(Scope *S, Declarator &D)
Definition: SemaType.cpp:6385
clang::Sema::ActOnChooseExpr
ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr, SourceLocation RPLoc)
Definition: SemaExpr.cpp:15391
clang::Sema::ActOnCUDAExecConfigExpr
ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, MultiExprArg ExecConfig, SourceLocation GGGLoc)
Definition: SemaCUDA.cpp:50
clang::PreferredTypeBuilder::get
QualType get(SourceLocation Tok) const
Get the expected type associated with this location, if any.
Definition: Sema.h:332
clang::Sema::ActOnBuiltinOffsetOf
ExprResult ActOnBuiltinOffsetOf(Scope *S, SourceLocation BuiltinLoc, SourceLocation TypeLoc, ParsedType ParsedArgTy, ArrayRef< OffsetOfComponent > Components, SourceLocation RParenLoc)
Definition: SemaExpr.cpp:15372
clang::C11
@ C11
Definition: LangStandard.h:45
Id
int Id
Definition: ASTDiff.cpp:191
clang::XRayInstrKind::None
constexpr XRayInstrMask None
Definition: XRayInstr.h:38
clang::Parser::ParseUnqualifiedId
bool ParseUnqualifiedId(CXXScopeSpec &SS, ParsedType ObjectType, bool ObjectHadErrors, bool EnteringContext, bool AllowDestructorName, bool AllowConstructorName, bool AllowDeductionGuide, SourceLocation *TemplateKWLoc, UnqualifiedId &Result)
Parse a C++ unqualified-id (or a C identifier), which describes the name of an entity.
Definition: ParseExprCXX.cpp:2780
clang::BalancedDelimiterTracker::getCloseLocation
SourceLocation getCloseLocation() const
Definition: RAIIObjectsForParser.h:428
clang::PreferredTypeBuilder::enterUnary
void enterUnary(Sema &S, SourceLocation Tok, tok::TokenKind OpKind, SourceLocation OpLoc)
Definition: SemaCodeComplete.cpp:575
clang::SourceRange::getEnd
SourceLocation getEnd() const
Definition: SourceLocation.h:220
clang::Sema::ActOnCXXFoldExpr
ExprResult ActOnCXXFoldExpr(Scope *S, SourceLocation LParenLoc, Expr *LHS, tok::TokenKind Operator, SourceLocation EllipsisLoc, Expr *RHS, SourceLocation RParenLoc)
Handle a C++1z fold-expression: ( expr op ... op expr ).
Definition: SemaTemplateVariadic.cpp:1186
clang::Token::getKind
tok::TokenKind getKind() const
Definition: Token.h:92
clang::ExprResult
ActionResult< Expr * > ExprResult
Definition: Ownership.h:262
clang::Preprocessor::isAtStartOfMacroExpansion
bool isAtStartOfMacroExpansion(SourceLocation loc, SourceLocation *MacroBegin=nullptr) const
Returns true if the given MacroID location points at the first token of the macro expansion.
Definition: Preprocessor.h:1877
clang::CPlusPlus
@ CPlusPlus
Definition: LangStandard.h:48
clang::Parser::StopBeforeMatch
@ StopBeforeMatch
Stop skipping at specified token, but don't skip the token itself.
Definition: Parser.h:1186
clang::Scope::CompoundStmtScope
@ CompoundStmtScope
This is a compound statement scope.
Definition: Scope.h:130
clang::Sema::ExpressionEvaluationContext::Unevaluated
@ Unevaluated
The current expression and its subexpressions occur within an unevaluated operand (C++11 [expr]p7),...
clang::Sema::CodeCompleteExpression
void CodeCompleteExpression(Scope *S, const CodeCompleteExpressionData &Data)
Perform code-completion in an expression context when we know what type we're looking for.
Definition: SemaCodeComplete.cpp:4603
clang::Expr::containsErrors
bool containsErrors() const
Whether this expression contains subexpressions which had errors, e.g.
Definition: Expr.h:238
clang::Type::isVectorType
bool isVectorType() const
Definition: Type.h:6778
clang::Parser::getLangOpts
const LangOptions & getLangOpts() const
Definition: Parser.h:437
clang::DeclaratorContext::BlockLiteral
@ BlockLiteral
clang::LabelDecl
Represents the declaration of a label.
Definition: Decl.h:496
clang::TypoCorrection::isKeyword
bool isKeyword() const
Definition: TypoCorrection.h:202
clang::Sema::ActOnBlockStart
void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope)
ActOnBlockStart - This callback is invoked when a block literal is started.
Definition: SemaExpr.cpp:15430
clang::Token::is
bool is(tok::TokenKind K) const
is/isNot - Predicates to check if this token is a specific kind, as in "if (Tok.is(tok::l_brace)) {....
Definition: Token.h:97
clang::Stmt::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: Stmt.cpp:348
clang::Parser::ParseExpression
ExprResult ParseExpression(TypeCastState isTypeCast=NotTypeCast)
Simple precedence-based parser for binary/ternary operators.
Definition: ParseExpr.cpp:123
clang::Type::isFunctionType
bool isFunctionType() const
Definition: Type.h:6672
clang::Sema::CodeCompleteOrdinaryName
void CodeCompleteOrdinaryName(Scope *S, ParserCompletionContext CompletionContext)
Definition: SemaCodeComplete.cpp:4176
clang::TemplateIdAnnotation::Kind
TemplateNameKind Kind
The kind of template that Template refers to.
Definition: ParsedTemplate.h:175
clang::Sema::ActOnVAArg
ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, SourceLocation RPLoc)
Definition: SemaExpr.cpp:15774
clang::Token::getAnnotationEndLoc
SourceLocation getAnnotationEndLoc() const
Definition: Token.h:140
ASTContext.h
clang::SourceLocation::isFileID
bool isFileID() const
Definition: SourceLocation.h:102
clang::Sema::CodeCompleteMemberReferenceExpr
void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, Expr *OtherOpBase, SourceLocation OpLoc, bool IsArrow, bool IsBaseExprStatement, QualType PreferredType)
Definition: SemaCodeComplete.cpp:5437
clang::Sema::TentativeAnalysisScope
RAII class used to indicate that we are performing provisional semantic analysis to determine the val...
Definition: Sema.h:9215
ExprCXX.h
Base
clang::Parser::getCurScope
Scope * getCurScope() const
Definition: Parser.h:444
clang::DeclContext::isRecord
bool isRecord() const
Definition: DeclBase.h:1939
clang::SourceLocExpr::Function
@ Function
Definition: Expr.h:4683
clang::Parser::Diag
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Definition: Parser.cpp:73
clang::Token::isNot
bool isNot(tok::TokenKind K) const
Definition: Token.h:98
clang::Parser::MaybeTypeCast
@ MaybeTypeCast
Definition: Parser.h:1733
getKind
static Decl::Kind getKind(const Decl *D)
Definition: DeclBase.cpp:998
clang::Parser::ParseStringLiteralExpression
ExprResult ParseStringLiteralExpression(bool AllowUserDefinedLiteral=false)
clang::Sema::ActOnUnaryExprOrTypeTraitExpr
ExprResult ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, UnaryExprOrTypeTrait ExprKind, bool IsType, void *TyOrEx, SourceRange ArgRange)
ActOnUnaryExprOrTypeTraitExpr - Handle sizeof(type) and sizeof expr and the same for alignof and __al...
Definition: SemaExpr.cpp:4551
clang::AvailabilitySpec
One specifier in an @available expression.
Definition: Availability.h:30
clang::Parser::StopAtSemi
@ StopAtSemi
Stop skipping at semicolon.
Definition: Parser.h:1184
clang::Sema::ActOnSYCLUniqueStableNameExpr
ExprResult ActOnSYCLUniqueStableNameExpr(SourceLocation OpLoc, SourceLocation LParen, SourceLocation RParen, ParsedType ParsedTy)
Definition: SemaExpr.cpp:3508
PrettyStackTrace.h
clang::Sema::ActOnSourceLocExpr
ExprResult ActOnSourceLocExpr(SourceLocExpr::IdentKind Kind, SourceLocation BuiltinLoc, SourceLocation RPLoc)
Definition: SemaExpr.cpp:15951
clang::Sema::ActOnObjCBoolLiteral
ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind)
ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals.
Definition: SemaExpr.cpp:19864
clang::OpaquePtr< QualType >
clang::Preprocessor::getSourceManager
SourceManager & getSourceManager() const
Definition: Preprocessor.h:964
clang::Preprocessor::getSpelling
StringRef getSpelling(SourceLocation loc, SmallVectorImpl< char > &buffer, bool *invalid=nullptr) const
Return the 'spelling' of the token at the given location; does not go up to the spelling location or ...
Definition: Preprocessor.h:1759
clang::Parser::ParseConstantExpression
ExprResult ParseConstantExpression(TypeCastState isTypeCast=NotTypeCast)
Definition: ParseExpr.cpp:211
clang::syntax::NodeRole::Operand
@ Operand
clang::tok::TokenKind
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:25
clang::Parser::ParseCaseExpression
ExprResult ParseCaseExpression(SourceLocation CaseLoc)
Definition: ParseExpr.cpp:221
P
StringRef P
Definition: ASTMatchersInternal.cpp:563
clang::Parser::ParseConstraintLogicalOrExpression
ExprResult ParseConstraintLogicalOrExpression(bool IsTrailingRequiresClause)
Parse a constraint-logical-or-expression.
Definition: ParseExpr.cpp:349
clang::Parser::ConsumeToken
SourceLocation ConsumeToken()
ConsumeToken - Consume the current 'peek token' and lex the next one.
Definition: Parser.h:482
clang::Sema::ActOnCoawaitExpr
ExprResult ActOnCoawaitExpr(Scope *S, SourceLocation KwLoc, Expr *E)
Definition: SemaCoroutine.cpp:797
clang::ActionResult::get
PtrTy get() const
Definition: Ownership.h:169
clang::TNK_Type_template
@ TNK_Type_template
The name refers to a template whose specialization produces a type.
Definition: TemplateKinds.h:30
clang::Sema::ActOnCharacterConstant
ExprResult ActOnCharacterConstant(const Token &Tok, Scope *UDLScope=nullptr)
Definition: SemaExpr.cpp:3540
clang::DeclContext::getParent
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1860
clang::Expr::getExprLoc
SourceLocation getExprLoc() const LLVM_READONLY
getExprLoc - Return the preferred location for the arrow when diagnosing a problem with a generic exp...
Definition: Expr.cpp:229
clang::ASTContext::getPrintingPolicy
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:687
clang::OBC_BridgeTransfer
@ OBC_BridgeTransfer
Bridging via __bridge_transfer, which transfers ownership of an Objective-C pointer into ARC.
Definition: OperationKinds.h:42
clang::Type::isSpecificPlaceholderType
bool isSpecificPlaceholderType(unsigned K) const
Test for a specific placeholder type.
Definition: Type.h:6948
clang::QualType::isNull
bool isNull() const
Return true if this QualType doesn't point to a type yet.
Definition: Type.h:738
clang::Parser::ParseTypeName
TypeResult ParseTypeName(SourceRange *Range=nullptr, DeclaratorContext Context=DeclaratorContext::TypeName, AccessSpecifier AS=AS_none, Decl **OwnedType=nullptr, ParsedAttributes *Attrs=nullptr)
ParseTypeName type-name: [C99 6.7.6] specifier-qualifier-list abstract-declarator[opt].
Definition: ParseDecl.cpp:43
llvm::ArrayRef
Definition: LLVM.h:34
Scope.h
clang::EnterExpressionEvaluationContext
RAII object that enters a new expression evaluation context.
Definition: Sema.h:13131
clang::Sema::ActOnStartStmtExpr
void ActOnStartStmtExpr()
Definition: SemaExpr.cpp:15122
clang::TypeLoc
Base wrapper for a particular "section" of type source info.
Definition: TypeLoc.h:58
clang::ActionResult::isInvalid
bool isInvalid() const
Definition: Ownership.h:165
clang::FunctionDefinitionKind::Definition
@ Definition
clang::Sema::ActOnConditionalOp
ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, SourceLocation ColonLoc, Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr)
ActOnConditionalOp - Parse a ?: operation.
Definition: SemaExpr.cpp:8810
clang::Token::getName
const char * getName() const
Definition: Token.h:168
clang::Parser::TryConsumeToken
bool TryConsumeToken(tok::TokenKind Expected)
Definition: Parser.h:490
clang::DeclContext::isFileContext
bool isFileContext() const
Definition: DeclBase.h:1930
clang::Sema::ContextRAII
A RAII object to temporarily push a declaration context.
Definition: Sema.h:979
clang::Sema::ActOnNumericConstant
ExprResult ActOnNumericConstant(const Token &Tok, Scope *UDLScope=nullptr)
Definition: SemaExpr.cpp:3663
clang::BalancedDelimiterTracker::getOpenLocation
SourceLocation getOpenLocation() const
Definition: RAIIObjectsForParser.h:427
clang::Sema::CodeCompletePostfixExpression
void CodeCompletePostfixExpression(Scope *S, ExprResult LHS, QualType PreferredType)
Definition: SemaCodeComplete.cpp:4680
clang::Sema::getExprRange
SourceRange getExprRange(Expr *E) const
Definition: SemaExpr.cpp:490
clang::IdentifierInfo
One of these records is kept for each identifier that is lexed.
Definition: IdentifierTable.h:84
clang::Token::getLocation
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file.
Definition: Token.h:126
clang::PrettyStackTraceLoc
If a crash happens while one of these objects are live, the message is printed out along with the spe...
Definition: PrettyStackTrace.h:26
clang::ObjCPropertyAttribute::Kind
Kind
Definition: DeclObjCCommon.h:22
clang::Sema::ActOnPackExpansion
ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, SourceLocation EllipsisLoc)
Invoked when parsing a template argument followed by an ellipsis, which creates a pack expansion.
Definition: SemaTemplateVariadic.cpp:551
clang::ActionResult< Expr * >
clang::ExtensionRAIIObject
ExtensionRAIIObject - This saves the state of extension warnings when constructed and disables them.
Definition: RAIIObjectsForParser.h:252
clang::Sema::ReuseLambdaContextDecl
@ ReuseLambdaContextDecl
Definition: Sema.h:5031
clang::Sema::ActOnConstantExpression
ExprResult ActOnConstantExpression(ExprResult Res)
Definition: SemaExpr.cpp:18507
clang::Sema::ExpressionEvaluationContext::ConstantEvaluated
@ ConstantEvaluated
The current context is "potentially evaluated" in C++11 terms, but the expression is evaluated at com...
clang::Sema::CodeCompleteAvailabilityPlatformName
void CodeCompleteAvailabilityPlatformName()
Definition: SemaCodeComplete.cpp:9713
clang::Sema::ActOnConvertVectorExpr
ExprResult ActOnConvertVectorExpr(Expr *E, ParsedType ParsedDestTy, SourceLocation BuiltinLoc, SourceLocation RParenLoc)
__builtin_convertvector(...)
Definition: SemaExpr.cpp:6653
clang::StmtResult
ActionResult< Stmt * > StmtResult
Definition: Ownership.h:263
clang::Parser::ParseConstraintLogicalAndExpression
ExprResult ParseConstraintLogicalAndExpression(bool IsTrailingRequiresClause)
Parse a constraint-logical-and-expression.
Definition: ParseExpr.cpp:257
clang::DeclaratorContext::TypeName
@ TypeName
clang::IdentifierInfo::getName
StringRef getName() const
Return the actual identifier string.
Definition: IdentifierTable.h:195
clang::SourceLocation::isInvalid
bool isInvalid() const
Definition: SourceLocation.h:111
clang::Sema::ActOnUnaryOp
ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, tok::TokenKind Op, Expr *Input)
Definition: SemaExpr.cpp:15108
clang::BalancedDelimiterTracker::skipToEnd
void skipToEnd()
Definition: Parser.cpp:2581
clang
Definition: CalledOnceCheck.h:17
clang::Sema::CreateRecoveryExpr
ExprResult CreateRecoveryExpr(SourceLocation Begin, SourceLocation End, ArrayRef< Expr * > SubExprs, QualType T=QualType())
Attempts to produce a RecoveryExpr after some AST node cannot be created.
Definition: SemaExpr.cpp:19916
clang::Parser::getActions
Sema & getActions() const
Definition: Parser.h:440
clang::prec::LogicalOr
@ LogicalOr
Definition: OperatorPrecedence.h:31
clang::Sema::LookupOrCreateLabel
LabelDecl * LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, SourceLocation GnuLabelLoc=SourceLocation())
LookupOrCreateLabel - Do a name lookup of a label with the specified name.
Definition: SemaLookup.cpp:4102
clang::Parser::TryAnnotateTypeOrScopeToken
bool TryAnnotateTypeOrScopeToken()
TryAnnotateTypeOrScopeToken - If the current token position is on a typename (possibly qualified in C...
Definition: Parser.cpp:1851
clang::Stmt
Stmt - This represents one statement.
Definition: Stmt.h:69
clang::Declarator
Information about one declarator, including the parsed type information and the identifier.
Definition: DeclSpec.h:1804
clang::SourceManager::isInSystemHeader
bool isInSystemHeader(SourceLocation Loc) const
Returns if a SourceLocation is in a system header.
Definition: SourceManager.h:1488
clang::prec::Level
Level
Definition: OperatorPrecedence.h:26
clang::TypoCorrection::getCorrectionDecl
NamedDecl * getCorrectionDecl() const
Gets the pointer to the declaration of the typo correction.
Definition: TypoCorrection.h:151
clang::SourceLocation::isValid
bool isValid() const
Return true if this is a valid SourceLocation object.
Definition: SourceLocation.h:110
clang::CorrectionCandidateCallback
Base class for callback objects used by Sema::CorrectTypo to check the validity of a potential typo c...
Definition: TypoCorrection.h:281
clang::FixItHint::CreateRemoval
static FixItHint CreateRemoval(CharSourceRange RemoveRange)
Create a code modification hint that removes the given source range.
Definition: Diagnostic.h:122
clang::getBinOpPrecedence
prec::Level getBinOpPrecedence(tok::TokenKind Kind, bool GreaterThanIsOperator, bool CPlusPlus11)
Return the precedence of the specified binary operator token.
Definition: OperatorPrecedence.cpp:17
clang::Preprocessor::getLocForEndOfToken
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Computes the source location just past the end of the token at this source location.
Definition: Preprocessor.h:1868
clang::Token::setKind
void setKind(tok::TokenKind K)
Definition: Token.h:93
clang::Sema::ActOnParenExpr
ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E)
Definition: SemaExpr.cpp:4035
clang::Parser::ParseConstantExpressionInExprEvalContext
ExprResult ParseConstantExpressionInExprEvalContext(TypeCastState isTypeCast=NotTypeCast)
Definition: ParseExpr.cpp:201
CheckAvailabilitySpecList
static bool CheckAvailabilitySpecList(Parser &P, ArrayRef< AvailabilitySpec > AvailSpecs)
Validate availability spec list, emitting diagnostics if necessary.
Definition: ParseExpr.cpp:3584
clang::Sema::ActOnAddrLabel
ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, LabelDecl *TheDecl)
ActOnAddrLabel - Parse the GNU address of label extension: "&&foo".
Definition: SemaExpr.cpp:15114
clang::Stmt::getBeginLoc
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Stmt.cpp:336
clang::prec::InclusiveOr
@ InclusiveOr
Definition: OperatorPrecedence.h:33
clang::BalancedDelimiterTracker::consumeClose
bool consumeClose()
Definition: RAIIObjectsForParser.h:446
clang::OpaquePtr::getAsOpaquePtr
void * getAsOpaquePtr() const
Definition: Ownership.h:90
clang::Token::isOneOf
bool isOneOf(tok::TokenKind K1, tok::TokenKind K2) const
Definition: Token.h:99
clang::Token::getLastLoc
SourceLocation getLastLoc() const
Definition: Token.h:149
clang::Parser::getTypeAnnotation
static TypeResult getTypeAnnotation(const Token &Tok)
getTypeAnnotation - Read a parsed type out of an annotation token.
Definition: Parser.h:798
clang::Sema::ActOnSizeofParameterPackExpr
ExprResult ActOnSizeofParameterPackExpr(Scope *S, SourceLocation OpLoc, IdentifierInfo &Name, SourceLocation NameLoc, SourceLocation RParenLoc)
Called when an expression computing the size of a parameter pack is parsed.
Definition: SemaTemplateVariadic.cpp:1004
REVERTIBLE_TYPE_TRAIT
#define REVERTIBLE_TYPE_TRAIT(Name)
clang::Sema::ActOnOMPArrayShapingExpr
ExprResult ActOnOMPArrayShapingExpr(Expr *Base, SourceLocation LParenLoc, SourceLocation RParenLoc, ArrayRef< Expr * > Dims, ArrayRef< SourceRange > Brackets)
Definition: SemaExpr.cpp:5090
clang::CPlusPlus11
@ CPlusPlus11
Definition: LangStandard.h:49
llvm::SmallVectorImpl
Definition: LLVM.h:39
clang::Scope::DeclScope
@ DeclScope
This is a scope that can contain a declaration.
Definition: Scope.h:59
clang::Sema::ActOnCaseExpr
ExprResult ActOnCaseExpr(SourceLocation CaseLoc, ExprResult Val)
Definition: SemaStmt.cpp:445
clang::Sema::ActOnPredefinedExpr
ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind)
Definition: SemaExpr.cpp:3523
clang::Expr
This represents one expression.
Definition: Expr.h:109
clang::IdentifierInfo::hasRevertedTokenIDToIdentifier
bool hasRevertedTokenIDToIdentifier() const
True if revertTokenIDToIdentifier() was called.
Definition: IdentifierTable.h:264
SM
#define SM(sm)
Definition: Cuda.cpp:81
clang::Sema::ActOnOMPArraySectionExpr
ExprResult ActOnOMPArraySectionExpr(Expr *Base, SourceLocation LBLoc, Expr *LowerBound, SourceLocation ColonLocFirst, SourceLocation ColonLocSecond, Expr *Length, Expr *Stride, SourceLocation RBLoc)
Definition: SemaExpr.cpp:4902
clang::IdentifierLoc
Wraps an identifier and optional source location for the identifier.
Definition: ParsedAttr.h:187
clang::CastExpr
CastExpr - Base class for type casts, including both implicit casts (ImplicitCastExpr) and explicit c...
Definition: Expr.h:3473
clang::Parser::NextToken
const Token & NextToken()
NextToken - This peeks ahead one token and returns it without consuming it.
Definition: Parser.h:793
clang::Sema::ActOnCompoundLiteral
ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, ParsedType Ty, SourceLocation RParenLoc, Expr *InitExpr)
Definition: SemaExpr.cpp:6943
clang::Sema::PCC_Type
@ PCC_Type
Code completion occurs where only a type is permitted.
Definition: Sema.h:12473
clang::Parser::IsTypeCast
@ IsTypeCast
Definition: Parser.h:1734
clang::Sema::ActOnNameClassifiedAsOverloadSet
ExprResult ActOnNameClassifiedAsOverloadSet(Scope *S, Expr *OverloadSet)
Act on the result of classifying a name as an overload set.
Definition: SemaDecl.cpp:1252
clang::OBC_Bridge
@ OBC_Bridge
Bridging via __bridge, which does nothing but reinterpret the bits.
Definition: OperationKinds.h:39
clang::Sema::CheckConstraintExpression
bool CheckConstraintExpression(const Expr *CE, Token NextToken=Token(), bool *PossibleNonPrimary=nullptr, bool IsTrailingRequiresClause=false)
Check whether the given expression is a valid constraint expression.
Definition: SemaConcept.cpp:63
clang::Sema::CodeCompleteObjCClassPropertyRefExpr
void CodeCompleteObjCClassPropertyRefExpr(Scope *S, IdentifierInfo &ClassName, SourceLocation ClassNameLoc, bool IsBaseExprStatement)
Definition: SemaCodeComplete.cpp:5594
clang::ActionResult::isUsable
bool isUsable() const
Definition: Ownership.h:166
clang::Sema::ActOnCallExpr
ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, MultiExprArg ArgExprs, SourceLocation RParenLoc, Expr *ExecConfig=nullptr)
ActOnCallExpr - Handle a call to Fn with the specified array of arguments.
Definition: SemaExpr.cpp:6363
clang::Sema::ActOnStmtExprError
void ActOnStmtExprError()
Definition: SemaExpr.cpp:15126
clang::CXXScopeSpec::isNotEmpty
bool isNotEmpty() const
A scope specifier is present, but may be valid or invalid.
Definition: DeclSpec.h:192
clang::FixItHint::CreateReplacement
static FixItHint CreateReplacement(CharSourceRange RemoveRange, StringRef Code)
Create a code modification hint that replaces the given source range with the given code string.
Definition: Diagnostic.h:133
clang::Sema::ActOnBlockStmtExpr
ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, Scope *CurScope)
ActOnBlockStmtExpr - This is called when the body of a block statement literal was successfully compl...
Definition: SemaExpr.cpp:15589
clang::DeclSpec
Captures information about "declaration specifiers".
Definition: DeclSpec.h:229
clang::prec::Spaceship
@ Spaceship
Definition: OperatorPrecedence.h:38
ParsedTemplate.h
clang::Sema::ActOnGenericSelectionExpr
ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, SourceLocation DefaultLoc, SourceLocation RParenLoc, Expr *ControllingExpr, ArrayRef< ParsedType > ArgTypes, ArrayRef< Expr * > ArgExprs)
Definition: SemaExpr.cpp:1573
clang::UnaryExprOrTypeTrait
UnaryExprOrTypeTrait
Names for the "expression or type" traits.
Definition: TypeTraits.h:51
clang::Sema::CorrectDelayedTyposInExpr
ExprResult CorrectDelayedTyposInExpr(Expr *E, VarDecl *InitDecl=nullptr, bool RecoverUncorrectedTypos=false, llvm::function_ref< ExprResult(Expr *)> Filter=[](Expr *E) -> ExprResult { return E;})
Process any TypoExprs in the given Expr and its children, generating diagnostics as appropriate and r...
Definition: SemaExprCXX.cpp:8502
Parser.h