clang  15.0.0git
ParseExpr.cpp
Go to the documentation of this file.
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 (true) {
404  // Every iteration may rely on a preferred type for the whole expression.
405  PreferredType = SavedType;
406  // If this token has a lower precedence than we are allowed to parse (e.g.
407  // because we are called recursively, or because the token is not a binop),
408  // then we are done!
409  if (NextTokPrec < MinPrec)
410  return LHS;
411 
412  // Consume the operator, saving the operator token for error reporting.
413  Token OpToken = Tok;
414  ConsumeToken();
415 
416  if (OpToken.is(tok::caretcaret)) {
417  return ExprError(Diag(Tok, diag::err_opencl_logical_exclusive_or));
418  }
419 
420  // If we're potentially in a template-id, we may now be able to determine
421  // whether we're actually in one or not.
422  if (OpToken.isOneOf(tok::comma, tok::greater, tok::greatergreater,
423  tok::greatergreatergreater) &&
424  checkPotentialAngleBracketDelimiter(OpToken))
425  return ExprError();
426 
427  // Bail out when encountering a comma followed by a token which can't
428  // possibly be the start of an expression. For instance:
429  // int f() { return 1, }
430  // We can't do this before consuming the comma, because
431  // isNotExpressionStart() looks at the token stream.
432  if (OpToken.is(tok::comma) && isNotExpressionStart()) {
433  PP.EnterToken(Tok, /*IsReinject*/true);
434  Tok = OpToken;
435  return LHS;
436  }
437 
438  // If the next token is an ellipsis, then this is a fold-expression. Leave
439  // it alone so we can handle it in the paren expression.
440  if (isFoldOperator(NextTokPrec) && Tok.is(tok::ellipsis)) {
441  // FIXME: We can't check this via lookahead before we consume the token
442  // because that tickles a lexer bug.
443  PP.EnterToken(Tok, /*IsReinject*/true);
444  Tok = OpToken;
445  return LHS;
446  }
447 
448  // In Objective-C++, alternative operator tokens can be used as keyword args
449  // in message expressions. Unconsume the token so that it can reinterpreted
450  // as an identifier in ParseObjCMessageExpressionBody. i.e., we support:
451  // [foo meth:0 and:0];
452  // [foo not_eq];
453  if (getLangOpts().ObjC && getLangOpts().CPlusPlus &&
454  Tok.isOneOf(tok::colon, tok::r_square) &&
455  OpToken.getIdentifierInfo() != nullptr) {
456  PP.EnterToken(Tok, /*IsReinject*/true);
457  Tok = OpToken;
458  return LHS;
459  }
460 
461  // Special case handling for the ternary operator.
462  ExprResult TernaryMiddle(true);
463  if (NextTokPrec == prec::Conditional) {
464  if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
465  // Parse a braced-init-list here for error recovery purposes.
466  SourceLocation BraceLoc = Tok.getLocation();
467  TernaryMiddle = ParseBraceInitializer();
468  if (!TernaryMiddle.isInvalid()) {
469  Diag(BraceLoc, diag::err_init_list_bin_op)
470  << /*RHS*/ 1 << PP.getSpelling(OpToken)
471  << Actions.getExprRange(TernaryMiddle.get());
472  TernaryMiddle = ExprError();
473  }
474  } else if (Tok.isNot(tok::colon)) {
475  // Don't parse FOO:BAR as if it were a typo for FOO::BAR.
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_source_location' '(' ')'
795 /// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')'
796 /// [GNU] '__null'
797 /// [OBJC] '[' objc-message-expr ']'
798 /// [OBJC] '\@selector' '(' objc-selector-arg ')'
799 /// [OBJC] '\@protocol' '(' identifier ')'
800 /// [OBJC] '\@encode' '(' type-name ')'
801 /// [OBJC] objc-string-literal
802 /// [C++] simple-type-specifier '(' expression-list[opt] ')' [C++ 5.2.3]
803 /// [C++11] simple-type-specifier braced-init-list [C++11 5.2.3]
804 /// [C++] typename-specifier '(' expression-list[opt] ')' [C++ 5.2.3]
805 /// [C++11] typename-specifier braced-init-list [C++11 5.2.3]
806 /// [C++] 'const_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1]
807 /// [C++] 'dynamic_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1]
808 /// [C++] 'reinterpret_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1]
809 /// [C++] 'static_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1]
810 /// [C++] 'typeid' '(' expression ')' [C++ 5.2p1]
811 /// [C++] 'typeid' '(' type-id ')' [C++ 5.2p1]
812 /// [C++] 'this' [C++ 9.3.2]
813 /// [G++] unary-type-trait '(' type-id ')'
814 /// [G++] binary-type-trait '(' type-id ',' type-id ')' [TODO]
815 /// [EMBT] array-type-trait '(' type-id ',' integer ')'
816 /// [clang] '^' block-literal
817 ///
818 /// constant: [C99 6.4.4]
819 /// integer-constant
820 /// floating-constant
821 /// enumeration-constant -> identifier
822 /// character-constant
823 ///
824 /// id-expression: [C++ 5.1]
825 /// unqualified-id
826 /// qualified-id
827 ///
828 /// unqualified-id: [C++ 5.1]
829 /// identifier
830 /// operator-function-id
831 /// conversion-function-id
832 /// '~' class-name
833 /// template-id
834 ///
835 /// new-expression: [C++ 5.3.4]
836 /// '::'[opt] 'new' new-placement[opt] new-type-id
837 /// new-initializer[opt]
838 /// '::'[opt] 'new' new-placement[opt] '(' type-id ')'
839 /// new-initializer[opt]
840 ///
841 /// delete-expression: [C++ 5.3.5]
842 /// '::'[opt] 'delete' cast-expression
843 /// '::'[opt] 'delete' '[' ']' cast-expression
844 ///
845 /// [GNU/Embarcadero] unary-type-trait:
846 /// '__is_arithmetic'
847 /// '__is_floating_point'
848 /// '__is_integral'
849 /// '__is_lvalue_expr'
850 /// '__is_rvalue_expr'
851 /// '__is_complete_type'
852 /// '__is_void'
853 /// '__is_array'
854 /// '__is_function'
855 /// '__is_reference'
856 /// '__is_lvalue_reference'
857 /// '__is_rvalue_reference'
858 /// '__is_fundamental'
859 /// '__is_object'
860 /// '__is_scalar'
861 /// '__is_compound'
862 /// '__is_pointer'
863 /// '__is_member_object_pointer'
864 /// '__is_member_function_pointer'
865 /// '__is_member_pointer'
866 /// '__is_const'
867 /// '__is_volatile'
868 /// '__is_trivial'
869 /// '__is_standard_layout'
870 /// '__is_signed'
871 /// '__is_unsigned'
872 ///
873 /// [GNU] unary-type-trait:
874 /// '__has_nothrow_assign'
875 /// '__has_nothrow_copy'
876 /// '__has_nothrow_constructor'
877 /// '__has_trivial_assign' [TODO]
878 /// '__has_trivial_copy' [TODO]
879 /// '__has_trivial_constructor'
880 /// '__has_trivial_destructor'
881 /// '__has_virtual_destructor'
882 /// '__is_abstract' [TODO]
883 /// '__is_class'
884 /// '__is_empty' [TODO]
885 /// '__is_enum'
886 /// '__is_final'
887 /// '__is_pod'
888 /// '__is_polymorphic'
889 /// '__is_sealed' [MS]
890 /// '__is_trivial'
891 /// '__is_union'
892 /// '__has_unique_object_representations'
893 ///
894 /// [Clang] unary-type-trait:
895 /// '__is_aggregate'
896 /// '__trivially_copyable'
897 ///
898 /// binary-type-trait:
899 /// [GNU] '__is_base_of'
900 /// [MS] '__is_convertible_to'
901 /// '__is_convertible'
902 /// '__is_same'
903 ///
904 /// [Embarcadero] array-type-trait:
905 /// '__array_rank'
906 /// '__array_extent'
907 ///
908 /// [Embarcadero] expression-trait:
909 /// '__is_lvalue_expr'
910 /// '__is_rvalue_expr'
911 /// \endverbatim
912 ///
913 ExprResult Parser::ParseCastExpression(CastParseKind ParseKind,
914  bool isAddressOfOperand,
915  bool &NotCastExpr,
916  TypeCastState isTypeCast,
917  bool isVectorLiteral,
918  bool *NotPrimaryExpression) {
919  ExprResult Res;
920  tok::TokenKind SavedKind = Tok.getKind();
921  auto SavedType = PreferredType;
922  NotCastExpr = false;
923 
924  // Are postfix-expression suffix operators permitted after this
925  // cast-expression? If not, and we find some, we'll parse them anyway and
926  // diagnose them.
927  bool AllowSuffix = true;
928 
929  // This handles all of cast-expression, unary-expression, postfix-expression,
930  // and primary-expression. We handle them together like this for efficiency
931  // and to simplify handling of an expression starting with a '(' token: which
932  // may be one of a parenthesized expression, cast-expression, compound literal
933  // expression, or statement expression.
934  //
935  // If the parsed tokens consist of a primary-expression, the cases below
936  // break out of the switch; at the end we call ParsePostfixExpressionSuffix
937  // to handle the postfix expression suffixes. Cases that cannot be followed
938  // by postfix exprs should set AllowSuffix to false.
939  switch (SavedKind) {
940  case tok::l_paren: {
941  // If this expression is limited to being a unary-expression, the paren can
942  // not start a cast expression.
943  ParenParseOption ParenExprType;
944  switch (ParseKind) {
945  case CastParseKind::UnaryExprOnly:
946  if (!getLangOpts().CPlusPlus)
947  ParenExprType = CompoundLiteral;
948  LLVM_FALLTHROUGH;
949  case CastParseKind::AnyCastExpr:
950  ParenExprType = ParenParseOption::CastExpr;
951  break;
952  case CastParseKind::PrimaryExprOnly:
953  ParenExprType = FoldExpr;
954  break;
955  }
956  ParsedType CastTy;
957  SourceLocation RParenLoc;
958  Res = ParseParenExpression(ParenExprType, false/*stopIfCastExr*/,
959  isTypeCast == IsTypeCast, CastTy, RParenLoc);
960 
961  // FIXME: What should we do if a vector literal is followed by a
962  // postfix-expression suffix? Usually postfix operators are permitted on
963  // literals.
964  if (isVectorLiteral)
965  return Res;
966 
967  switch (ParenExprType) {
968  case SimpleExpr: break; // Nothing else to do.
969  case CompoundStmt: break; // Nothing else to do.
970  case CompoundLiteral:
971  // We parsed '(' type-name ')' '{' ... '}'. If any suffixes of
972  // postfix-expression exist, parse them now.
973  break;
974  case CastExpr:
975  // We have parsed the cast-expression and no postfix-expr pieces are
976  // following.
977  return Res;
978  case FoldExpr:
979  // We only parsed a fold-expression. There might be postfix-expr pieces
980  // afterwards; parse them now.
981  break;
982  }
983 
984  break;
985  }
986 
987  // primary-expression
988  case tok::numeric_constant:
989  // constant: integer-constant
990  // constant: floating-constant
991 
992  Res = Actions.ActOnNumericConstant(Tok, /*UDLScope*/getCurScope());
993  ConsumeToken();
994  break;
995 
996  case tok::kw_true:
997  case tok::kw_false:
998  Res = ParseCXXBoolLiteral();
999  break;
1000 
1001  case tok::kw___objc_yes:
1002  case tok::kw___objc_no:
1003  Res = ParseObjCBoolLiteral();
1004  break;
1005 
1006  case tok::kw_nullptr:
1007  Diag(Tok, diag::warn_cxx98_compat_nullptr);
1008  Res = Actions.ActOnCXXNullPtrLiteral(ConsumeToken());
1009  break;
1010 
1011  case tok::annot_primary_expr:
1012  case tok::annot_overload_set:
1013  Res = getExprAnnotation(Tok);
1014  if (!Res.isInvalid() && Tok.getKind() == tok::annot_overload_set)
1015  Res = Actions.ActOnNameClassifiedAsOverloadSet(getCurScope(), Res.get());
1016  ConsumeAnnotationToken();
1017  if (!Res.isInvalid() && Tok.is(tok::less))
1018  checkPotentialAngleBracket(Res);
1019  break;
1020 
1021  case tok::annot_non_type:
1022  case tok::annot_non_type_dependent:
1023  case tok::annot_non_type_undeclared: {
1024  CXXScopeSpec SS;
1025  Token Replacement;
1026  Res = tryParseCXXIdExpression(SS, isAddressOfOperand, Replacement);
1027  assert(!Res.isUnset() &&
1028  "should not perform typo correction on annotation token");
1029  break;
1030  }
1031 
1032  case tok::kw___super:
1033  case tok::kw_decltype:
1034  // Annotate the token and tail recurse.
1036  return ExprError();
1037  assert(Tok.isNot(tok::kw_decltype) && Tok.isNot(tok::kw___super));
1038  return ParseCastExpression(ParseKind, isAddressOfOperand, isTypeCast,
1039  isVectorLiteral, NotPrimaryExpression);
1040 
1041  case tok::identifier: { // primary-expression: identifier
1042  // unqualified-id: identifier
1043  // constant: enumeration-constant
1044  // Turn a potentially qualified name into a annot_typename or
1045  // annot_cxxscope if it would be valid. This handles things like x::y, etc.
1046  if (getLangOpts().CPlusPlus) {
1047  // Avoid the unnecessary parse-time lookup in the common case
1048  // where the syntax forbids a type.
1049  const Token &Next = NextToken();
1050 
1051  // If this identifier was reverted from a token ID, and the next token
1052  // is a parenthesis, this is likely to be a use of a type trait. Check
1053  // those tokens.
1054  if (Next.is(tok::l_paren) &&
1055  Tok.is(tok::identifier) &&
1057  IdentifierInfo *II = Tok.getIdentifierInfo();
1058  // Build up the mapping of revertible type traits, for future use.
1059  if (RevertibleTypeTraits.empty()) {
1060 #define RTT_JOIN(X,Y) X##Y
1061 #define REVERTIBLE_TYPE_TRAIT(Name) \
1062  RevertibleTypeTraits[PP.getIdentifierInfo(#Name)] \
1063  = RTT_JOIN(tok::kw_,Name)
1064 
1065  REVERTIBLE_TYPE_TRAIT(__is_abstract);
1066  REVERTIBLE_TYPE_TRAIT(__is_aggregate);
1067  REVERTIBLE_TYPE_TRAIT(__is_arithmetic);
1068  REVERTIBLE_TYPE_TRAIT(__is_array);
1069  REVERTIBLE_TYPE_TRAIT(__is_assignable);
1070  REVERTIBLE_TYPE_TRAIT(__is_base_of);
1071  REVERTIBLE_TYPE_TRAIT(__is_class);
1072  REVERTIBLE_TYPE_TRAIT(__is_complete_type);
1073  REVERTIBLE_TYPE_TRAIT(__is_compound);
1074  REVERTIBLE_TYPE_TRAIT(__is_const);
1075  REVERTIBLE_TYPE_TRAIT(__is_constructible);
1076  REVERTIBLE_TYPE_TRAIT(__is_convertible);
1077  REVERTIBLE_TYPE_TRAIT(__is_convertible_to);
1078  REVERTIBLE_TYPE_TRAIT(__is_destructible);
1079  REVERTIBLE_TYPE_TRAIT(__is_empty);
1080  REVERTIBLE_TYPE_TRAIT(__is_enum);
1081  REVERTIBLE_TYPE_TRAIT(__is_floating_point);
1082  REVERTIBLE_TYPE_TRAIT(__is_final);
1083  REVERTIBLE_TYPE_TRAIT(__is_function);
1084  REVERTIBLE_TYPE_TRAIT(__is_fundamental);
1085  REVERTIBLE_TYPE_TRAIT(__is_integral);
1086  REVERTIBLE_TYPE_TRAIT(__is_interface_class);
1087  REVERTIBLE_TYPE_TRAIT(__is_literal);
1088  REVERTIBLE_TYPE_TRAIT(__is_lvalue_expr);
1089  REVERTIBLE_TYPE_TRAIT(__is_lvalue_reference);
1090  REVERTIBLE_TYPE_TRAIT(__is_member_function_pointer);
1091  REVERTIBLE_TYPE_TRAIT(__is_member_object_pointer);
1092  REVERTIBLE_TYPE_TRAIT(__is_member_pointer);
1093  REVERTIBLE_TYPE_TRAIT(__is_nothrow_assignable);
1094  REVERTIBLE_TYPE_TRAIT(__is_nothrow_constructible);
1095  REVERTIBLE_TYPE_TRAIT(__is_nothrow_destructible);
1096  REVERTIBLE_TYPE_TRAIT(__is_object);
1097  REVERTIBLE_TYPE_TRAIT(__is_pod);
1098  REVERTIBLE_TYPE_TRAIT(__is_pointer);
1099  REVERTIBLE_TYPE_TRAIT(__is_polymorphic);
1100  REVERTIBLE_TYPE_TRAIT(__is_reference);
1101  REVERTIBLE_TYPE_TRAIT(__is_rvalue_expr);
1102  REVERTIBLE_TYPE_TRAIT(__is_rvalue_reference);
1103  REVERTIBLE_TYPE_TRAIT(__is_same);
1104  REVERTIBLE_TYPE_TRAIT(__is_scalar);
1105  REVERTIBLE_TYPE_TRAIT(__is_sealed);
1106  REVERTIBLE_TYPE_TRAIT(__is_signed);
1107  REVERTIBLE_TYPE_TRAIT(__is_standard_layout);
1108  REVERTIBLE_TYPE_TRAIT(__is_trivial);
1109  REVERTIBLE_TYPE_TRAIT(__is_trivially_assignable);
1110  REVERTIBLE_TYPE_TRAIT(__is_trivially_constructible);
1111  REVERTIBLE_TYPE_TRAIT(__is_trivially_copyable);
1112  REVERTIBLE_TYPE_TRAIT(__is_union);
1113  REVERTIBLE_TYPE_TRAIT(__is_unsigned);
1114  REVERTIBLE_TYPE_TRAIT(__is_void);
1115  REVERTIBLE_TYPE_TRAIT(__is_volatile);
1116 #undef REVERTIBLE_TYPE_TRAIT
1117 #undef RTT_JOIN
1118  }
1119 
1120  // If we find that this is in fact the name of a type trait,
1121  // update the token kind in place and parse again to treat it as
1122  // the appropriate kind of type trait.
1123  llvm::SmallDenseMap<IdentifierInfo *, tok::TokenKind>::iterator Known
1124  = RevertibleTypeTraits.find(II);
1125  if (Known != RevertibleTypeTraits.end()) {
1126  Tok.setKind(Known->second);
1127  return ParseCastExpression(ParseKind, isAddressOfOperand,
1128  NotCastExpr, isTypeCast,
1129  isVectorLiteral, NotPrimaryExpression);
1130  }
1131  }
1132 
1133  if ((!ColonIsSacred && Next.is(tok::colon)) ||
1134  Next.isOneOf(tok::coloncolon, tok::less, tok::l_paren,
1135  tok::l_brace)) {
1136  // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse.
1138  return ExprError();
1139  if (!Tok.is(tok::identifier))
1140  return ParseCastExpression(ParseKind, isAddressOfOperand,
1141  NotCastExpr, isTypeCast,
1142  isVectorLiteral,
1143  NotPrimaryExpression);
1144  }
1145  }
1146 
1147  // Consume the identifier so that we can see if it is followed by a '(' or
1148  // '.'.
1149  IdentifierInfo &II = *Tok.getIdentifierInfo();
1150  SourceLocation ILoc = ConsumeToken();
1151 
1152  // Support 'Class.property' and 'super.property' notation.
1153  if (getLangOpts().ObjC && Tok.is(tok::period) &&
1154  (Actions.getTypeName(II, ILoc, getCurScope()) ||
1155  // Allow the base to be 'super' if in an objc-method.
1156  (&II == Ident_super && getCurScope()->isInObjcMethodScope()))) {
1157  ConsumeToken();
1158 
1159  if (Tok.is(tok::code_completion) && &II != Ident_super) {
1160  cutOffParsing();
1162  getCurScope(), II, ILoc, ExprStatementTokLoc == ILoc);
1163  return ExprError();
1164  }
1165  // Allow either an identifier or the keyword 'class' (in C++).
1166  if (Tok.isNot(tok::identifier) &&
1167  !(getLangOpts().CPlusPlus && Tok.is(tok::kw_class))) {
1168  Diag(Tok, diag::err_expected_property_name);
1169  return ExprError();
1170  }
1171  IdentifierInfo &PropertyName = *Tok.getIdentifierInfo();
1172  SourceLocation PropertyLoc = ConsumeToken();
1173 
1174  Res = Actions.ActOnClassPropertyRefExpr(II, PropertyName,
1175  ILoc, PropertyLoc);
1176  break;
1177  }
1178 
1179  // In an Objective-C method, if we have "super" followed by an identifier,
1180  // the token sequence is ill-formed. However, if there's a ':' or ']' after
1181  // that identifier, this is probably a message send with a missing open
1182  // bracket. Treat it as such.
1183  if (getLangOpts().ObjC && &II == Ident_super && !InMessageExpression &&
1184  getCurScope()->isInObjcMethodScope() &&
1185  ((Tok.is(tok::identifier) &&
1186  (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) ||
1187  Tok.is(tok::code_completion))) {
1188  Res = ParseObjCMessageExpressionBody(SourceLocation(), ILoc, nullptr,
1189  nullptr);
1190  break;
1191  }
1192 
1193  // If we have an Objective-C class name followed by an identifier
1194  // and either ':' or ']', this is an Objective-C class message
1195  // send that's missing the opening '['. Recovery
1196  // appropriately. Also take this path if we're performing code
1197  // completion after an Objective-C class name.
1198  if (getLangOpts().ObjC &&
1199  ((Tok.is(tok::identifier) && !InMessageExpression) ||
1200  Tok.is(tok::code_completion))) {
1201  const Token& Next = NextToken();
1202  if (Tok.is(tok::code_completion) ||
1203  Next.is(tok::colon) || Next.is(tok::r_square))
1204  if (ParsedType Typ = Actions.getTypeName(II, ILoc, getCurScope()))
1205  if (Typ.get()->isObjCObjectOrInterfaceType()) {
1206  // Fake up a Declarator to use with ActOnTypeName.
1207  DeclSpec DS(AttrFactory);
1208  DS.SetRangeStart(ILoc);
1209  DS.SetRangeEnd(ILoc);
1210  const char *PrevSpec = nullptr;
1211  unsigned DiagID;
1212  DS.SetTypeSpecType(TST_typename, ILoc, PrevSpec, DiagID, Typ,
1213  Actions.getASTContext().getPrintingPolicy());
1214 
1215  Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName);
1216  TypeResult Ty = Actions.ActOnTypeName(getCurScope(),
1217  DeclaratorInfo);
1218  if (Ty.isInvalid())
1219  break;
1220 
1221  Res = ParseObjCMessageExpressionBody(SourceLocation(),
1222  SourceLocation(),
1223  Ty.get(), nullptr);
1224  break;
1225  }
1226  }
1227 
1228  // Make sure to pass down the right value for isAddressOfOperand.
1229  if (isAddressOfOperand && isPostfixExpressionSuffixStart())
1230  isAddressOfOperand = false;
1231 
1232  // Function designators are allowed to be undeclared (C99 6.5.1p2), so we
1233  // need to know whether or not this identifier is a function designator or
1234  // not.
1235  UnqualifiedId Name;
1236  CXXScopeSpec ScopeSpec;
1237  SourceLocation TemplateKWLoc;
1238  Token Replacement;
1239  CastExpressionIdValidator Validator(
1240  /*Next=*/Tok,
1241  /*AllowTypes=*/isTypeCast != NotTypeCast,
1242  /*AllowNonTypes=*/isTypeCast != IsTypeCast);
1243  Validator.IsAddressOfOperand = isAddressOfOperand;
1244  if (Tok.isOneOf(tok::periodstar, tok::arrowstar)) {
1245  Validator.WantExpressionKeywords = false;
1246  Validator.WantRemainingKeywords = false;
1247  } else {
1248  Validator.WantRemainingKeywords = Tok.isNot(tok::r_paren);
1249  }
1250  Name.setIdentifier(&II, ILoc);
1251  Res = Actions.ActOnIdExpression(
1252  getCurScope(), ScopeSpec, TemplateKWLoc, Name, Tok.is(tok::l_paren),
1253  isAddressOfOperand, &Validator,
1254  /*IsInlineAsmIdentifier=*/false,
1255  Tok.is(tok::r_paren) ? nullptr : &Replacement);
1256  if (!Res.isInvalid() && Res.isUnset()) {
1257  UnconsumeToken(Replacement);
1258  return ParseCastExpression(ParseKind, isAddressOfOperand,
1259  NotCastExpr, isTypeCast,
1260  /*isVectorLiteral=*/false,
1261  NotPrimaryExpression);
1262  }
1263  if (!Res.isInvalid() && Tok.is(tok::less))
1264  checkPotentialAngleBracket(Res);
1265  break;
1266  }
1267  case tok::char_constant: // constant: character-constant
1268  case tok::wide_char_constant:
1269  case tok::utf8_char_constant:
1270  case tok::utf16_char_constant:
1271  case tok::utf32_char_constant:
1272  Res = Actions.ActOnCharacterConstant(Tok, /*UDLScope*/getCurScope());
1273  ConsumeToken();
1274  break;
1275  case tok::kw___func__: // primary-expression: __func__ [C99 6.4.2.2]
1276  case tok::kw___FUNCTION__: // primary-expression: __FUNCTION__ [GNU]
1277  case tok::kw___FUNCDNAME__: // primary-expression: __FUNCDNAME__ [MS]
1278  case tok::kw___FUNCSIG__: // primary-expression: __FUNCSIG__ [MS]
1279  case tok::kw_L__FUNCTION__: // primary-expression: L__FUNCTION__ [MS]
1280  case tok::kw_L__FUNCSIG__: // primary-expression: L__FUNCSIG__ [MS]
1281  case tok::kw___PRETTY_FUNCTION__: // primary-expression: __P..Y_F..N__ [GNU]
1282  Res = Actions.ActOnPredefinedExpr(Tok.getLocation(), SavedKind);
1283  ConsumeToken();
1284  break;
1285  case tok::string_literal: // primary-expression: string-literal
1286  case tok::wide_string_literal:
1287  case tok::utf8_string_literal:
1288  case tok::utf16_string_literal:
1289  case tok::utf32_string_literal:
1290  Res = ParseStringLiteralExpression(true);
1291  break;
1292  case tok::kw__Generic: // primary-expression: generic-selection [C11 6.5.1]
1293  Res = ParseGenericSelectionExpression();
1294  break;
1295  case tok::kw___builtin_available:
1296  Res = ParseAvailabilityCheckExpr(Tok.getLocation());
1297  break;
1298  case tok::kw___builtin_va_arg:
1299  case tok::kw___builtin_offsetof:
1300  case tok::kw___builtin_choose_expr:
1301  case tok::kw___builtin_astype: // primary-expression: [OCL] as_type()
1302  case tok::kw___builtin_convertvector:
1303  case tok::kw___builtin_COLUMN:
1304  case tok::kw___builtin_FILE:
1305  case tok::kw___builtin_FUNCTION:
1306  case tok::kw___builtin_LINE:
1307  case tok::kw___builtin_source_location:
1308  if (NotPrimaryExpression)
1309  *NotPrimaryExpression = true;
1310  // This parses the complete suffix; we can return early.
1311  return ParseBuiltinPrimaryExpression();
1312  case tok::kw___null:
1313  Res = Actions.ActOnGNUNullExpr(ConsumeToken());
1314  break;
1315 
1316  case tok::plusplus: // unary-expression: '++' unary-expression [C99]
1317  case tok::minusminus: { // unary-expression: '--' unary-expression [C99]
1318  if (NotPrimaryExpression)
1319  *NotPrimaryExpression = true;
1320  // C++ [expr.unary] has:
1321  // unary-expression:
1322  // ++ cast-expression
1323  // -- cast-expression
1324  Token SavedTok = Tok;
1325  ConsumeToken();
1326 
1327  PreferredType.enterUnary(Actions, Tok.getLocation(), SavedTok.getKind(),
1328  SavedTok.getLocation());
1329  // One special case is implicitly handled here: if the preceding tokens are
1330  // an ambiguous cast expression, such as "(T())++", then we recurse to
1331  // determine whether the '++' is prefix or postfix.
1332  Res = ParseCastExpression(getLangOpts().CPlusPlus ?
1333  UnaryExprOnly : AnyCastExpr,
1334  /*isAddressOfOperand*/false, NotCastExpr,
1335  NotTypeCast);
1336  if (NotCastExpr) {
1337  // If we return with NotCastExpr = true, we must not consume any tokens,
1338  // so put the token back where we found it.
1339  assert(Res.isInvalid());
1340  UnconsumeToken(SavedTok);
1341  return ExprError();
1342  }
1343  if (!Res.isInvalid()) {
1344  Expr *Arg = Res.get();
1345  Res = Actions.ActOnUnaryOp(getCurScope(), SavedTok.getLocation(),
1346  SavedKind, Arg);
1347  if (Res.isInvalid())
1348  Res = Actions.CreateRecoveryExpr(SavedTok.getLocation(),
1349  Arg->getEndLoc(), Arg);
1350  }
1351  return Res;
1352  }
1353  case tok::amp: { // unary-expression: '&' cast-expression
1354  if (NotPrimaryExpression)
1355  *NotPrimaryExpression = true;
1356  // Special treatment because of member pointers
1357  SourceLocation SavedLoc = ConsumeToken();
1358  PreferredType.enterUnary(Actions, Tok.getLocation(), tok::amp, SavedLoc);
1359  Res = ParseCastExpression(AnyCastExpr, true);
1360  if (!Res.isInvalid()) {
1361  Expr *Arg = Res.get();
1362  Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Arg);
1363  if (Res.isInvalid())
1364  Res = Actions.CreateRecoveryExpr(Tok.getLocation(), Arg->getEndLoc(),
1365  Arg);
1366  }
1367  return Res;
1368  }
1369 
1370  case tok::star: // unary-expression: '*' cast-expression
1371  case tok::plus: // unary-expression: '+' cast-expression
1372  case tok::minus: // unary-expression: '-' cast-expression
1373  case tok::tilde: // unary-expression: '~' cast-expression
1374  case tok::exclaim: // unary-expression: '!' cast-expression
1375  case tok::kw___real: // unary-expression: '__real' cast-expression [GNU]
1376  case tok::kw___imag: { // unary-expression: '__imag' cast-expression [GNU]
1377  if (NotPrimaryExpression)
1378  *NotPrimaryExpression = true;
1379  SourceLocation SavedLoc = ConsumeToken();
1380  PreferredType.enterUnary(Actions, Tok.getLocation(), SavedKind, SavedLoc);
1381  Res = ParseCastExpression(AnyCastExpr);
1382  if (!Res.isInvalid()) {
1383  Expr *Arg = Res.get();
1384  Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Arg);
1385  if (Res.isInvalid())
1386  Res = Actions.CreateRecoveryExpr(SavedLoc, Arg->getEndLoc(), Arg);
1387  }
1388  return Res;
1389  }
1390 
1391  case tok::kw_co_await: { // unary-expression: 'co_await' cast-expression
1392  if (NotPrimaryExpression)
1393  *NotPrimaryExpression = true;
1394  SourceLocation CoawaitLoc = ConsumeToken();
1395  Res = ParseCastExpression(AnyCastExpr);
1396  if (!Res.isInvalid())
1397  Res = Actions.ActOnCoawaitExpr(getCurScope(), CoawaitLoc, Res.get());
1398  return Res;
1399  }
1400 
1401  case tok::kw___extension__:{//unary-expression:'__extension__' cast-expr [GNU]
1402  // __extension__ silences extension warnings in the subexpression.
1403  if (NotPrimaryExpression)
1404  *NotPrimaryExpression = true;
1405  ExtensionRAIIObject O(Diags); // Use RAII to do this.
1406  SourceLocation SavedLoc = ConsumeToken();
1407  Res = ParseCastExpression(AnyCastExpr);
1408  if (!Res.isInvalid())
1409  Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get());
1410  return Res;
1411  }
1412  case tok::kw__Alignof: // unary-expression: '_Alignof' '(' type-name ')'
1413  if (!getLangOpts().C11)
1414  Diag(Tok, diag::ext_c11_feature) << Tok.getName();
1415  LLVM_FALLTHROUGH;
1416  case tok::kw_alignof: // unary-expression: 'alignof' '(' type-id ')'
1417  case tok::kw___alignof: // unary-expression: '__alignof' unary-expression
1418  // unary-expression: '__alignof' '(' type-name ')'
1419  case tok::kw_sizeof: // unary-expression: 'sizeof' unary-expression
1420  // unary-expression: 'sizeof' '(' type-name ')'
1421  case tok::kw_vec_step: // unary-expression: OpenCL 'vec_step' expression
1422  // unary-expression: '__builtin_omp_required_simd_align' '(' type-name ')'
1423  case tok::kw___builtin_omp_required_simd_align:
1424  if (NotPrimaryExpression)
1425  *NotPrimaryExpression = true;
1426  AllowSuffix = false;
1427  Res = ParseUnaryExprOrTypeTraitExpression();
1428  break;
1429  case tok::ampamp: { // unary-expression: '&&' identifier
1430  if (NotPrimaryExpression)
1431  *NotPrimaryExpression = true;
1432  SourceLocation AmpAmpLoc = ConsumeToken();
1433  if (Tok.isNot(tok::identifier))
1434  return ExprError(Diag(Tok, diag::err_expected) << tok::identifier);
1435 
1436  if (getCurScope()->getFnParent() == nullptr)
1437  return ExprError(Diag(Tok, diag::err_address_of_label_outside_fn));
1438 
1439  Diag(AmpAmpLoc, diag::ext_gnu_address_of_label);
1440  LabelDecl *LD = Actions.LookupOrCreateLabel(Tok.getIdentifierInfo(),
1441  Tok.getLocation());
1442  Res = Actions.ActOnAddrLabel(AmpAmpLoc, Tok.getLocation(), LD);
1443  ConsumeToken();
1444  AllowSuffix = false;
1445  break;
1446  }
1447  case tok::kw_const_cast:
1448  case tok::kw_dynamic_cast:
1449  case tok::kw_reinterpret_cast:
1450  case tok::kw_static_cast:
1451  case tok::kw_addrspace_cast:
1452  if (NotPrimaryExpression)
1453  *NotPrimaryExpression = true;
1454  Res = ParseCXXCasts();
1455  break;
1456  case tok::kw___builtin_bit_cast:
1457  if (NotPrimaryExpression)
1458  *NotPrimaryExpression = true;
1459  Res = ParseBuiltinBitCast();
1460  break;
1461  case tok::kw_typeid:
1462  if (NotPrimaryExpression)
1463  *NotPrimaryExpression = true;
1464  Res = ParseCXXTypeid();
1465  break;
1466  case tok::kw___uuidof:
1467  if (NotPrimaryExpression)
1468  *NotPrimaryExpression = true;
1469  Res = ParseCXXUuidof();
1470  break;
1471  case tok::kw_this:
1472  Res = ParseCXXThis();
1473  break;
1474  case tok::kw___builtin_sycl_unique_stable_name:
1475  Res = ParseSYCLUniqueStableNameExpression();
1476  break;
1477 
1478  case tok::annot_typename:
1479  if (isStartOfObjCClassMessageMissingOpenBracket()) {
1481 
1482  // Fake up a Declarator to use with ActOnTypeName.
1483  DeclSpec DS(AttrFactory);
1484  DS.SetRangeStart(Tok.getLocation());
1485  DS.SetRangeEnd(Tok.getLastLoc());
1486 
1487  const char *PrevSpec = nullptr;
1488  unsigned DiagID;
1489  DS.SetTypeSpecType(TST_typename, Tok.getAnnotationEndLoc(),
1490  PrevSpec, DiagID, Type,
1491  Actions.getASTContext().getPrintingPolicy());
1492 
1493  Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName);
1494  TypeResult Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
1495  if (Ty.isInvalid())
1496  break;
1497 
1498  ConsumeAnnotationToken();
1499  Res = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(),
1500  Ty.get(), nullptr);
1501  break;
1502  }
1503  LLVM_FALLTHROUGH;
1504 
1505  case tok::annot_decltype:
1506  case tok::kw_char:
1507  case tok::kw_wchar_t:
1508  case tok::kw_char8_t:
1509  case tok::kw_char16_t:
1510  case tok::kw_char32_t:
1511  case tok::kw_bool:
1512  case tok::kw_short:
1513  case tok::kw_int:
1514  case tok::kw_long:
1515  case tok::kw___int64:
1516  case tok::kw___int128:
1517  case tok::kw__ExtInt:
1518  case tok::kw__BitInt:
1519  case tok::kw_signed:
1520  case tok::kw_unsigned:
1521  case tok::kw_half:
1522  case tok::kw_float:
1523  case tok::kw_double:
1524  case tok::kw___bf16:
1525  case tok::kw__Float16:
1526  case tok::kw___float128:
1527  case tok::kw___ibm128:
1528  case tok::kw_void:
1529  case tok::kw_auto:
1530  case tok::kw_typename:
1531  case tok::kw_typeof:
1532  case tok::kw___vector:
1533 #define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t:
1534 #include "clang/Basic/OpenCLImageTypes.def"
1535  {
1536  if (!getLangOpts().CPlusPlus) {
1537  Diag(Tok, diag::err_expected_expression);
1538  return ExprError();
1539  }
1540 
1541  // Everything henceforth is a postfix-expression.
1542  if (NotPrimaryExpression)
1543  *NotPrimaryExpression = true;
1544 
1545  if (SavedKind == tok::kw_typename) {
1546  // postfix-expression: typename-specifier '(' expression-list[opt] ')'
1547  // typename-specifier braced-init-list
1549  return ExprError();
1550 
1551  if (!Actions.isSimpleTypeSpecifier(Tok.getKind()))
1552  // We are trying to parse a simple-type-specifier but might not get such
1553  // a token after error recovery.
1554  return ExprError();
1555  }
1556 
1557  // postfix-expression: simple-type-specifier '(' expression-list[opt] ')'
1558  // simple-type-specifier braced-init-list
1559  //
1560  DeclSpec DS(AttrFactory);
1561 
1562  ParseCXXSimpleTypeSpecifier(DS);
1563  if (Tok.isNot(tok::l_paren) &&
1564  (!getLangOpts().CPlusPlus11 || Tok.isNot(tok::l_brace)))
1565  return ExprError(Diag(Tok, diag::err_expected_lparen_after_type)
1566  << DS.getSourceRange());
1567 
1568  if (Tok.is(tok::l_brace))
1569  Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
1570 
1571  Res = ParseCXXTypeConstructExpression(DS);
1572  break;
1573  }
1574 
1575  case tok::annot_cxxscope: { // [C++] id-expression: qualified-id
1576  // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse.
1577  // (We can end up in this situation after tentative parsing.)
1579  return ExprError();
1580  if (!Tok.is(tok::annot_cxxscope))
1581  return ParseCastExpression(ParseKind, isAddressOfOperand, NotCastExpr,
1582  isTypeCast, isVectorLiteral,
1583  NotPrimaryExpression);
1584 
1585  Token Next = NextToken();
1586  if (Next.is(tok::annot_template_id)) {
1587  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Next);
1588  if (TemplateId->Kind == TNK_Type_template) {
1589  // We have a qualified template-id that we know refers to a
1590  // type, translate it into a type and continue parsing as a
1591  // cast expression.
1592  CXXScopeSpec SS;
1593  ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
1594  /*ObjectHasErrors=*/false,
1595  /*EnteringContext=*/false);
1596  AnnotateTemplateIdTokenAsType(SS);
1597  return ParseCastExpression(ParseKind, isAddressOfOperand, NotCastExpr,
1598  isTypeCast, isVectorLiteral,
1599  NotPrimaryExpression);
1600  }
1601  }
1602 
1603  // Parse as an id-expression.
1604  Res = ParseCXXIdExpression(isAddressOfOperand);
1605  break;
1606  }
1607 
1608  case tok::annot_template_id: { // [C++] template-id
1609  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1610  if (TemplateId->Kind == TNK_Type_template) {
1611  // We have a template-id that we know refers to a type,
1612  // translate it into a type and continue parsing as a cast
1613  // expression.
1614  CXXScopeSpec SS;
1615  AnnotateTemplateIdTokenAsType(SS);
1616  return ParseCastExpression(ParseKind, isAddressOfOperand,
1617  NotCastExpr, isTypeCast, isVectorLiteral,
1618  NotPrimaryExpression);
1619  }
1620 
1621  // Fall through to treat the template-id as an id-expression.
1622  LLVM_FALLTHROUGH;
1623  }
1624 
1625  case tok::kw_operator: // [C++] id-expression: operator/conversion-function-id
1626  Res = ParseCXXIdExpression(isAddressOfOperand);
1627  break;
1628 
1629  case tok::coloncolon: {
1630  // ::foo::bar -> global qualified name etc. If TryAnnotateTypeOrScopeToken
1631  // annotates the token, tail recurse.
1633  return ExprError();
1634  if (!Tok.is(tok::coloncolon))
1635  return ParseCastExpression(ParseKind, isAddressOfOperand, isTypeCast,
1636  isVectorLiteral, NotPrimaryExpression);
1637 
1638  // ::new -> [C++] new-expression
1639  // ::delete -> [C++] delete-expression
1640  SourceLocation CCLoc = ConsumeToken();
1641  if (Tok.is(tok::kw_new)) {
1642  if (NotPrimaryExpression)
1643  *NotPrimaryExpression = true;
1644  Res = ParseCXXNewExpression(true, CCLoc);
1645  AllowSuffix = false;
1646  break;
1647  }
1648  if (Tok.is(tok::kw_delete)) {
1649  if (NotPrimaryExpression)
1650  *NotPrimaryExpression = true;
1651  Res = ParseCXXDeleteExpression(true, CCLoc);
1652  AllowSuffix = false;
1653  break;
1654  }
1655 
1656  // This is not a type name or scope specifier, it is an invalid expression.
1657  Diag(CCLoc, diag::err_expected_expression);
1658  return ExprError();
1659  }
1660 
1661  case tok::kw_new: // [C++] new-expression
1662  if (NotPrimaryExpression)
1663  *NotPrimaryExpression = true;
1664  Res = ParseCXXNewExpression(false, Tok.getLocation());
1665  AllowSuffix = false;
1666  break;
1667 
1668  case tok::kw_delete: // [C++] delete-expression
1669  if (NotPrimaryExpression)
1670  *NotPrimaryExpression = true;
1671  Res = ParseCXXDeleteExpression(false, Tok.getLocation());
1672  AllowSuffix = false;
1673  break;
1674 
1675  case tok::kw_requires: // [C++2a] requires-expression
1676  Res = ParseRequiresExpression();
1677  AllowSuffix = false;
1678  break;
1679 
1680  case tok::kw_noexcept: { // [C++0x] 'noexcept' '(' expression ')'
1681  if (NotPrimaryExpression)
1682  *NotPrimaryExpression = true;
1683  Diag(Tok, diag::warn_cxx98_compat_noexcept_expr);
1684  SourceLocation KeyLoc = ConsumeToken();
1685  BalancedDelimiterTracker T(*this, tok::l_paren);
1686 
1687  if (T.expectAndConsume(diag::err_expected_lparen_after, "noexcept"))
1688  return ExprError();
1689  // C++11 [expr.unary.noexcept]p1:
1690  // The noexcept operator determines whether the evaluation of its operand,
1691  // which is an unevaluated operand, can throw an exception.
1694  Res = ParseExpression();
1695 
1696  T.consumeClose();
1697 
1698  if (!Res.isInvalid())
1699  Res = Actions.ActOnNoexceptExpr(KeyLoc, T.getOpenLocation(), Res.get(),
1700  T.getCloseLocation());
1701  AllowSuffix = false;
1702  break;
1703  }
1704 
1705 #define TYPE_TRAIT(N,Spelling,K) \
1706  case tok::kw_##Spelling:
1707 #include "clang/Basic/TokenKinds.def"
1708  Res = ParseTypeTrait();
1709  break;
1710 
1711  case tok::kw___array_rank:
1712  case tok::kw___array_extent:
1713  if (NotPrimaryExpression)
1714  *NotPrimaryExpression = true;
1715  Res = ParseArrayTypeTrait();
1716  break;
1717 
1718  case tok::kw___is_lvalue_expr:
1719  case tok::kw___is_rvalue_expr:
1720  if (NotPrimaryExpression)
1721  *NotPrimaryExpression = true;
1722  Res = ParseExpressionTrait();
1723  break;
1724 
1725  case tok::at: {
1726  if (NotPrimaryExpression)
1727  *NotPrimaryExpression = true;
1728  SourceLocation AtLoc = ConsumeToken();
1729  return ParseObjCAtExpression(AtLoc);
1730  }
1731  case tok::caret:
1732  Res = ParseBlockLiteralExpression();
1733  break;
1734  case tok::code_completion: {
1735  cutOffParsing();
1737  PreferredType.get(Tok.getLocation()));
1738  return ExprError();
1739  }
1740  case tok::l_square:
1741  if (getLangOpts().CPlusPlus11) {
1742  if (getLangOpts().ObjC) {
1743  // C++11 lambda expressions and Objective-C message sends both start with a
1744  // square bracket. There are three possibilities here:
1745  // we have a valid lambda expression, we have an invalid lambda
1746  // expression, or we have something that doesn't appear to be a lambda.
1747  // If we're in the last case, we fall back to ParseObjCMessageExpression.
1748  Res = TryParseLambdaExpression();
1749  if (!Res.isInvalid() && !Res.get()) {
1750  // We assume Objective-C++ message expressions are not
1751  // primary-expressions.
1752  if (NotPrimaryExpression)
1753  *NotPrimaryExpression = true;
1754  Res = ParseObjCMessageExpression();
1755  }
1756  break;
1757  }
1758  Res = ParseLambdaExpression();
1759  break;
1760  }
1761  if (getLangOpts().ObjC) {
1762  Res = ParseObjCMessageExpression();
1763  break;
1764  }
1765  LLVM_FALLTHROUGH;
1766  default:
1767  NotCastExpr = true;
1768  return ExprError();
1769  }
1770 
1771  // Check to see whether Res is a function designator only. If it is and we
1772  // are compiling for OpenCL, we need to return an error as this implies
1773  // that the address of the function is being taken, which is illegal in CL.
1774 
1775  if (ParseKind == PrimaryExprOnly)
1776  // This is strictly a primary-expression - no postfix-expr pieces should be
1777  // parsed.
1778  return Res;
1779 
1780  if (!AllowSuffix) {
1781  // FIXME: Don't parse a primary-expression suffix if we encountered a parse
1782  // error already.
1783  if (Res.isInvalid())
1784  return Res;
1785 
1786  switch (Tok.getKind()) {
1787  case tok::l_square:
1788  case tok::l_paren:
1789  case tok::plusplus:
1790  case tok::minusminus:
1791  // "expected ';'" or similar is probably the right diagnostic here. Let
1792  // the caller decide what to do.
1793  if (Tok.isAtStartOfLine())
1794  return Res;
1795 
1796  LLVM_FALLTHROUGH;
1797  case tok::period:
1798  case tok::arrow:
1799  break;
1800 
1801  default:
1802  return Res;
1803  }
1804 
1805  // This was a unary-expression for which a postfix-expression suffix is
1806  // not permitted by the grammar (eg, a sizeof expression or
1807  // new-expression or similar). Diagnose but parse the suffix anyway.
1808  Diag(Tok.getLocation(), diag::err_postfix_after_unary_requires_parens)
1809  << Tok.getKind() << Res.get()->getSourceRange()
1810  << FixItHint::CreateInsertion(Res.get()->getBeginLoc(), "(")
1811  << FixItHint::CreateInsertion(PP.getLocForEndOfToken(PrevTokLocation),
1812  ")");
1813  }
1814 
1815  // These can be followed by postfix-expr pieces.
1816  PreferredType = SavedType;
1817  Res = ParsePostfixExpressionSuffix(Res);
1818  if (getLangOpts().OpenCL &&
1819  !getActions().getOpenCLOptions().isAvailableOption(
1820  "__cl_clang_function_pointers", getLangOpts()))
1821  if (Expr *PostfixExpr = Res.get()) {
1822  QualType Ty = PostfixExpr->getType();
1823  if (!Ty.isNull() && Ty->isFunctionType()) {
1824  Diag(PostfixExpr->getExprLoc(),
1825  diag::err_opencl_taking_function_address_parser);
1826  return ExprError();
1827  }
1828  }
1829 
1830  return Res;
1831 }
1832 
1833 /// Once the leading part of a postfix-expression is parsed, this
1834 /// method parses any suffixes that apply.
1835 ///
1836 /// \verbatim
1837 /// postfix-expression: [C99 6.5.2]
1838 /// primary-expression
1839 /// postfix-expression '[' expression ']'
1840 /// postfix-expression '[' braced-init-list ']'
1841 /// postfix-expression '[' expression-list [opt] ']' [C++2b 12.4.5]
1842 /// postfix-expression '(' argument-expression-list[opt] ')'
1843 /// postfix-expression '.' identifier
1844 /// postfix-expression '->' identifier
1845 /// postfix-expression '++'
1846 /// postfix-expression '--'
1847 /// '(' type-name ')' '{' initializer-list '}'
1848 /// '(' type-name ')' '{' initializer-list ',' '}'
1849 ///
1850 /// argument-expression-list: [C99 6.5.2]
1851 /// argument-expression ...[opt]
1852 /// argument-expression-list ',' assignment-expression ...[opt]
1853 /// \endverbatim
1854 ExprResult
1855 Parser::ParsePostfixExpressionSuffix(ExprResult LHS) {
1856  // Now that the primary-expression piece of the postfix-expression has been
1857  // parsed, see if there are any postfix-expression pieces here.
1858  SourceLocation Loc;
1859  auto SavedType = PreferredType;
1860  while (true) {
1861  // Each iteration relies on preferred type for the whole expression.
1862  PreferredType = SavedType;
1863  switch (Tok.getKind()) {
1864  case tok::code_completion:
1865  if (InMessageExpression)
1866  return LHS;
1867 
1868  cutOffParsing();
1870  getCurScope(), LHS, PreferredType.get(Tok.getLocation()));
1871  return ExprError();
1872 
1873  case tok::identifier:
1874  // If we see identifier: after an expression, and we're not already in a
1875  // message send, then this is probably a message send with a missing
1876  // opening bracket '['.
1877  if (getLangOpts().ObjC && !InMessageExpression &&
1878  (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) {
1879  LHS = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(),
1880  nullptr, LHS.get());
1881  break;
1882  }
1883  // Fall through; this isn't a message send.
1884  LLVM_FALLTHROUGH;
1885 
1886  default: // Not a postfix-expression suffix.
1887  return LHS;
1888  case tok::l_square: { // postfix-expression: p-e '[' expression ']'
1889  // If we have a array postfix expression that starts on a new line and
1890  // Objective-C is enabled, it is highly likely that the user forgot a
1891  // semicolon after the base expression and that the array postfix-expr is
1892  // actually another message send. In this case, do some look-ahead to see
1893  // if the contents of the square brackets are obviously not a valid
1894  // expression and recover by pretending there is no suffix.
1895  if (getLangOpts().ObjC && Tok.isAtStartOfLine() &&
1896  isSimpleObjCMessageExpression())
1897  return LHS;
1898 
1899  // Reject array indices starting with a lambda-expression. '[[' is
1900  // reserved for attributes.
1901  if (CheckProhibitedCXX11Attribute()) {
1902  (void)Actions.CorrectDelayedTyposInExpr(LHS);
1903  return ExprError();
1904  }
1905  BalancedDelimiterTracker T(*this, tok::l_square);
1906  T.consumeOpen();
1907  Loc = T.getOpenLocation();
1908  ExprResult Length, Stride;
1909  SourceLocation ColonLocFirst, ColonLocSecond;
1910  ExprVector ArgExprs;
1911  bool HasError = false;
1912  PreferredType.enterSubscript(Actions, Tok.getLocation(), LHS.get());
1913 
1914  // We try to parse a list of indexes in all language mode first
1915  // and, in we find 0 or one index, we try to parse an OpenMP array
1916  // section. This allow us to support C++2b multi dimensional subscript and
1917  // OpenMp sections in the same language mode.
1918  if (!getLangOpts().OpenMP || Tok.isNot(tok::colon)) {
1919  if (!getLangOpts().CPlusPlus2b) {
1920  ExprResult Idx;
1921  if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
1922  Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
1923  Idx = ParseBraceInitializer();
1924  } else {
1925  Idx = ParseExpression(); // May be a comma expression
1926  }
1927  LHS = Actions.CorrectDelayedTyposInExpr(LHS);
1928  Idx = Actions.CorrectDelayedTyposInExpr(Idx);
1929  if (Idx.isInvalid()) {
1930  HasError = true;
1931  } else {
1932  ArgExprs.push_back(Idx.get());
1933  }
1934  } else if (Tok.isNot(tok::r_square)) {
1935  CommaLocsTy CommaLocs;
1936  if (ParseExpressionList(ArgExprs, CommaLocs)) {
1937  LHS = Actions.CorrectDelayedTyposInExpr(LHS);
1938  HasError = true;
1939  }
1940  assert(
1941  (ArgExprs.empty() || ArgExprs.size() == CommaLocs.size() + 1) &&
1942  "Unexpected number of commas!");
1943  }
1944  }
1945 
1946  if (ArgExprs.size() <= 1 && getLangOpts().OpenMP) {
1947  ColonProtectionRAIIObject RAII(*this);
1948  if (Tok.is(tok::colon)) {
1949  // Consume ':'
1950  ColonLocFirst = ConsumeToken();
1951  if (Tok.isNot(tok::r_square) &&
1952  (getLangOpts().OpenMP < 50 ||
1953  ((Tok.isNot(tok::colon) && getLangOpts().OpenMP >= 50)))) {
1954  Length = ParseExpression();
1955  Length = Actions.CorrectDelayedTyposInExpr(Length);
1956  }
1957  }
1958  if (getLangOpts().OpenMP >= 50 &&
1959  (OMPClauseKind == llvm::omp::Clause::OMPC_to ||
1960  OMPClauseKind == llvm::omp::Clause::OMPC_from) &&
1961  Tok.is(tok::colon)) {
1962  // Consume ':'
1963  ColonLocSecond = ConsumeToken();
1964  if (Tok.isNot(tok::r_square)) {
1965  Stride = ParseExpression();
1966  }
1967  }
1968  }
1969 
1970  SourceLocation RLoc = Tok.getLocation();
1971  LHS = Actions.CorrectDelayedTyposInExpr(LHS);
1972 
1973  if (!LHS.isInvalid() && !HasError && !Length.isInvalid() &&
1974  !Stride.isInvalid() && Tok.is(tok::r_square)) {
1975  if (ColonLocFirst.isValid() || ColonLocSecond.isValid()) {
1976  LHS = Actions.ActOnOMPArraySectionExpr(
1977  LHS.get(), Loc, ArgExprs.empty() ? nullptr : ArgExprs[0],
1978  ColonLocFirst, ColonLocSecond, Length.get(), Stride.get(), RLoc);
1979  } else {
1980  LHS = Actions.ActOnArraySubscriptExpr(getCurScope(), LHS.get(), Loc,
1981  ArgExprs, RLoc);
1982  }
1983  } else {
1984  LHS = ExprError();
1985  }
1986 
1987  // Match the ']'.
1988  T.consumeClose();
1989  break;
1990  }
1991 
1992  case tok::l_paren: // p-e: p-e '(' argument-expression-list[opt] ')'
1993  case tok::lesslessless: { // p-e: p-e '<<<' argument-expression-list '>>>'
1994  // '(' argument-expression-list[opt] ')'
1995  tok::TokenKind OpKind = Tok.getKind();
1996  InMessageExpressionRAIIObject InMessage(*this, false);
1997 
1998  Expr *ExecConfig = nullptr;
1999 
2000  BalancedDelimiterTracker PT(*this, tok::l_paren);
2001 
2002  if (OpKind == tok::lesslessless) {
2003  ExprVector ExecConfigExprs;
2004  CommaLocsTy ExecConfigCommaLocs;
2005  SourceLocation OpenLoc = ConsumeToken();
2006 
2007  if (ParseSimpleExpressionList(ExecConfigExprs, ExecConfigCommaLocs)) {
2008  (void)Actions.CorrectDelayedTyposInExpr(LHS);
2009  LHS = ExprError();
2010  }
2011 
2012  SourceLocation CloseLoc;
2013  if (TryConsumeToken(tok::greatergreatergreater, CloseLoc)) {
2014  } else if (LHS.isInvalid()) {
2015  SkipUntil(tok::greatergreatergreater, StopAtSemi);
2016  } else {
2017  // There was an error closing the brackets
2018  Diag(Tok, diag::err_expected) << tok::greatergreatergreater;
2019  Diag(OpenLoc, diag::note_matching) << tok::lesslessless;
2020  SkipUntil(tok::greatergreatergreater, StopAtSemi);
2021  LHS = ExprError();
2022  }
2023 
2024  if (!LHS.isInvalid()) {
2025  if (ExpectAndConsume(tok::l_paren))
2026  LHS = ExprError();
2027  else
2028  Loc = PrevTokLocation;
2029  }
2030 
2031  if (!LHS.isInvalid()) {
2032  ExprResult ECResult = Actions.ActOnCUDAExecConfigExpr(getCurScope(),
2033  OpenLoc,
2034  ExecConfigExprs,
2035  CloseLoc);
2036  if (ECResult.isInvalid())
2037  LHS = ExprError();
2038  else
2039  ExecConfig = ECResult.get();
2040  }
2041  } else {
2042  PT.consumeOpen();
2043  Loc = PT.getOpenLocation();
2044  }
2045 
2046  ExprVector ArgExprs;
2047  CommaLocsTy CommaLocs;
2048  auto RunSignatureHelp = [&]() -> QualType {
2049  QualType PreferredType = Actions.ProduceCallSignatureHelp(
2050  LHS.get(), ArgExprs, PT.getOpenLocation());
2051  CalledSignatureHelp = true;
2052  return PreferredType;
2053  };
2054  if (OpKind == tok::l_paren || !LHS.isInvalid()) {
2055  if (Tok.isNot(tok::r_paren)) {
2056  if (ParseExpressionList(ArgExprs, CommaLocs, [&] {
2057  PreferredType.enterFunctionArgument(Tok.getLocation(),
2058  RunSignatureHelp);
2059  })) {
2060  (void)Actions.CorrectDelayedTyposInExpr(LHS);
2061  // If we got an error when parsing expression list, we don't call
2062  // the CodeCompleteCall handler inside the parser. So call it here
2063  // to make sure we get overload suggestions even when we are in the
2064  // middle of a parameter.
2065  if (PP.isCodeCompletionReached() && !CalledSignatureHelp)
2066  RunSignatureHelp();
2067  LHS = ExprError();
2068  } else if (LHS.isInvalid()) {
2069  for (auto &E : ArgExprs)
2070  Actions.CorrectDelayedTyposInExpr(E);
2071  }
2072  }
2073  }
2074 
2075  // Match the ')'.
2076  if (LHS.isInvalid()) {
2077  SkipUntil(tok::r_paren, StopAtSemi);
2078  } else if (Tok.isNot(tok::r_paren)) {
2079  bool HadDelayedTypo = false;
2080  if (Actions.CorrectDelayedTyposInExpr(LHS).get() != LHS.get())
2081  HadDelayedTypo = true;
2082  for (auto &E : ArgExprs)
2083  if (Actions.CorrectDelayedTyposInExpr(E).get() != E)
2084  HadDelayedTypo = true;
2085  // If there were delayed typos in the LHS or ArgExprs, call SkipUntil
2086  // instead of PT.consumeClose() to avoid emitting extra diagnostics for
2087  // the unmatched l_paren.
2088  if (HadDelayedTypo)
2089  SkipUntil(tok::r_paren, StopAtSemi);
2090  else
2091  PT.consumeClose();
2092  LHS = ExprError();
2093  } else {
2094  assert(
2095  (ArgExprs.size() == 0 || ArgExprs.size() - 1 == CommaLocs.size()) &&
2096  "Unexpected number of commas!");
2097  Expr *Fn = LHS.get();
2098  SourceLocation RParLoc = Tok.getLocation();
2099  LHS = Actions.ActOnCallExpr(getCurScope(), Fn, Loc, ArgExprs, RParLoc,
2100  ExecConfig);
2101  if (LHS.isInvalid()) {
2102  ArgExprs.insert(ArgExprs.begin(), Fn);
2103  LHS =
2104  Actions.CreateRecoveryExpr(Fn->getBeginLoc(), RParLoc, ArgExprs);
2105  }
2106  PT.consumeClose();
2107  }
2108 
2109  break;
2110  }
2111  case tok::arrow:
2112  case tok::period: {
2113  // postfix-expression: p-e '->' template[opt] id-expression
2114  // postfix-expression: p-e '.' template[opt] id-expression
2115  tok::TokenKind OpKind = Tok.getKind();
2116  SourceLocation OpLoc = ConsumeToken(); // Eat the "." or "->" token.
2117 
2118  CXXScopeSpec SS;
2119  ParsedType ObjectType;
2120  bool MayBePseudoDestructor = false;
2121  Expr* OrigLHS = !LHS.isInvalid() ? LHS.get() : nullptr;
2122 
2123  PreferredType.enterMemAccess(Actions, Tok.getLocation(), OrigLHS);
2124 
2125  if (getLangOpts().CPlusPlus && !LHS.isInvalid()) {
2126  Expr *Base = OrigLHS;
2127  const Type* BaseType = Base->getType().getTypePtrOrNull();
2128  if (BaseType && Tok.is(tok::l_paren) &&
2129  (BaseType->isFunctionType() ||
2130  BaseType->isSpecificPlaceholderType(BuiltinType::BoundMember))) {
2131  Diag(OpLoc, diag::err_function_is_not_record)
2132  << OpKind << Base->getSourceRange()
2133  << FixItHint::CreateRemoval(OpLoc);
2134  return ParsePostfixExpressionSuffix(Base);
2135  }
2136 
2137  LHS = Actions.ActOnStartCXXMemberReference(getCurScope(), Base, OpLoc,
2138  OpKind, ObjectType,
2139  MayBePseudoDestructor);
2140  if (LHS.isInvalid()) {
2141  // Clang will try to perform expression based completion as a
2142  // fallback, which is confusing in case of member references. So we
2143  // stop here without any completions.
2144  if (Tok.is(tok::code_completion)) {
2145  cutOffParsing();
2146  return ExprError();
2147  }
2148  break;
2149  }
2150  ParseOptionalCXXScopeSpecifier(
2151  SS, ObjectType, LHS.get() && LHS.get()->containsErrors(),
2152  /*EnteringContext=*/false, &MayBePseudoDestructor);
2153  if (SS.isNotEmpty())
2154  ObjectType = nullptr;
2155  }
2156 
2157  if (Tok.is(tok::code_completion)) {
2158  tok::TokenKind CorrectedOpKind =
2159  OpKind == tok::arrow ? tok::period : tok::arrow;
2160  ExprResult CorrectedLHS(/*Invalid=*/true);
2161  if (getLangOpts().CPlusPlus && OrigLHS) {
2162  // FIXME: Creating a TentativeAnalysisScope from outside Sema is a
2163  // hack.
2164  Sema::TentativeAnalysisScope Trap(Actions);
2165  CorrectedLHS = Actions.ActOnStartCXXMemberReference(
2166  getCurScope(), OrigLHS, OpLoc, CorrectedOpKind, ObjectType,
2167  MayBePseudoDestructor);
2168  }
2169 
2170  Expr *Base = LHS.get();
2171  Expr *CorrectedBase = CorrectedLHS.get();
2172  if (!CorrectedBase && !getLangOpts().CPlusPlus)
2173  CorrectedBase = Base;
2174 
2175  // Code completion for a member access expression.
2176  cutOffParsing();
2178  getCurScope(), Base, CorrectedBase, OpLoc, OpKind == tok::arrow,
2179  Base && ExprStatementTokLoc == Base->getBeginLoc(),
2180  PreferredType.get(Tok.getLocation()));
2181 
2182  return ExprError();
2183  }
2184 
2185  if (MayBePseudoDestructor && !LHS.isInvalid()) {
2186  LHS = ParseCXXPseudoDestructor(LHS.get(), OpLoc, OpKind, SS,
2187  ObjectType);
2188  break;
2189  }
2190 
2191  // Either the action has told us that this cannot be a
2192  // pseudo-destructor expression (based on the type of base
2193  // expression), or we didn't see a '~' in the right place. We
2194  // can still parse a destructor name here, but in that case it
2195  // names a real destructor.
2196  // Allow explicit constructor calls in Microsoft mode.
2197  // FIXME: Add support for explicit call of template constructor.
2198  SourceLocation TemplateKWLoc;
2199  UnqualifiedId Name;
2200  if (getLangOpts().ObjC && OpKind == tok::period &&
2201  Tok.is(tok::kw_class)) {
2202  // Objective-C++:
2203  // After a '.' in a member access expression, treat the keyword
2204  // 'class' as if it were an identifier.
2205  //
2206  // This hack allows property access to the 'class' method because it is
2207  // such a common method name. For other C++ keywords that are
2208  // Objective-C method names, one must use the message send syntax.
2210  SourceLocation Loc = ConsumeToken();
2211  Name.setIdentifier(Id, Loc);
2212  } else if (ParseUnqualifiedId(
2213  SS, ObjectType, LHS.get() && LHS.get()->containsErrors(),
2214  /*EnteringContext=*/false,
2215  /*AllowDestructorName=*/true,
2216  /*AllowConstructorName=*/
2217  getLangOpts().MicrosoftExt && SS.isNotEmpty(),
2218  /*AllowDeductionGuide=*/false, &TemplateKWLoc, Name)) {
2219  (void)Actions.CorrectDelayedTyposInExpr(LHS);
2220  LHS = ExprError();
2221  }
2222 
2223  if (!LHS.isInvalid())
2224  LHS = Actions.ActOnMemberAccessExpr(getCurScope(), LHS.get(), OpLoc,
2225  OpKind, SS, TemplateKWLoc, Name,
2226  CurParsedObjCImpl ? CurParsedObjCImpl->Dcl
2227  : nullptr);
2228  if (!LHS.isInvalid()) {
2229  if (Tok.is(tok::less))
2230  checkPotentialAngleBracket(LHS);
2231  } else if (OrigLHS && Name.isValid()) {
2232  // Preserve the LHS if the RHS is an invalid member.
2233  LHS = Actions.CreateRecoveryExpr(OrigLHS->getBeginLoc(),
2234  Name.getEndLoc(), {OrigLHS});
2235  }
2236  break;
2237  }
2238  case tok::plusplus: // postfix-expression: postfix-expression '++'
2239  case tok::minusminus: // postfix-expression: postfix-expression '--'
2240  if (!LHS.isInvalid()) {
2241  Expr *Arg = LHS.get();
2242  LHS = Actions.ActOnPostfixUnaryOp(getCurScope(), Tok.getLocation(),
2243  Tok.getKind(), Arg);
2244  if (LHS.isInvalid())
2245  LHS = Actions.CreateRecoveryExpr(Arg->getBeginLoc(),
2246  Tok.getLocation(), Arg);
2247  }
2248  ConsumeToken();
2249  break;
2250  }
2251  }
2252 }
2253 
2254 /// ParseExprAfterUnaryExprOrTypeTrait - We parsed a typeof/sizeof/alignof/
2255 /// vec_step and we are at the start of an expression or a parenthesized
2256 /// type-id. OpTok is the operand token (typeof/sizeof/alignof). Returns the
2257 /// expression (isCastExpr == false) or the type (isCastExpr == true).
2258 ///
2259 /// \verbatim
2260 /// unary-expression: [C99 6.5.3]
2261 /// 'sizeof' unary-expression
2262 /// 'sizeof' '(' type-name ')'
2263 /// [GNU] '__alignof' unary-expression
2264 /// [GNU] '__alignof' '(' type-name ')'
2265 /// [C11] '_Alignof' '(' type-name ')'
2266 /// [C++0x] 'alignof' '(' type-id ')'
2267 ///
2268 /// [GNU] typeof-specifier:
2269 /// typeof ( expressions )
2270 /// typeof ( type-name )
2271 /// [GNU/C++] typeof unary-expression
2272 ///
2273 /// [OpenCL 1.1 6.11.12] vec_step built-in function:
2274 /// vec_step ( expressions )
2275 /// vec_step ( type-name )
2276 /// \endverbatim
2277 ExprResult
2278 Parser::ParseExprAfterUnaryExprOrTypeTrait(const Token &OpTok,
2279  bool &isCastExpr,
2280  ParsedType &CastTy,
2281  SourceRange &CastRange) {
2282 
2283  assert(OpTok.isOneOf(tok::kw_typeof, tok::kw_sizeof, tok::kw___alignof,
2284  tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step,
2285  tok::kw___builtin_omp_required_simd_align) &&
2286  "Not a typeof/sizeof/alignof/vec_step expression!");
2287 
2289 
2290  // If the operand doesn't start with an '(', it must be an expression.
2291  if (Tok.isNot(tok::l_paren)) {
2292  // If construct allows a form without parenthesis, user may forget to put
2293  // pathenthesis around type name.
2294  if (OpTok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof,
2295  tok::kw__Alignof)) {
2296  if (isTypeIdUnambiguously()) {
2297  DeclSpec DS(AttrFactory);
2298  ParseSpecifierQualifierList(DS);
2299  Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName);
2300  ParseDeclarator(DeclaratorInfo);
2301 
2302  SourceLocation LParenLoc = PP.getLocForEndOfToken(OpTok.getLocation());
2303  SourceLocation RParenLoc = PP.getLocForEndOfToken(PrevTokLocation);
2304  if (LParenLoc.isInvalid() || RParenLoc.isInvalid()) {
2305  Diag(OpTok.getLocation(),
2306  diag::err_expected_parentheses_around_typename)
2307  << OpTok.getName();
2308  } else {
2309  Diag(LParenLoc, diag::err_expected_parentheses_around_typename)
2310  << OpTok.getName() << FixItHint::CreateInsertion(LParenLoc, "(")
2311  << FixItHint::CreateInsertion(RParenLoc, ")");
2312  }
2313  isCastExpr = true;
2314  return ExprEmpty();
2315  }
2316  }
2317 
2318  isCastExpr = false;
2319  if (OpTok.is(tok::kw_typeof) && !getLangOpts().CPlusPlus) {
2320  Diag(Tok, diag::err_expected_after) << OpTok.getIdentifierInfo()
2321  << tok::l_paren;
2322  return ExprError();
2323  }
2324 
2325  Operand = ParseCastExpression(UnaryExprOnly);
2326  } else {
2327  // If it starts with a '(', we know that it is either a parenthesized
2328  // type-name, or it is a unary-expression that starts with a compound
2329  // literal, or starts with a primary-expression that is a parenthesized
2330  // expression.
2331  ParenParseOption ExprType = CastExpr;
2332  SourceLocation LParenLoc = Tok.getLocation(), RParenLoc;
2333 
2334  Operand = ParseParenExpression(ExprType, true/*stopIfCastExpr*/,
2335  false, CastTy, RParenLoc);
2336  CastRange = SourceRange(LParenLoc, RParenLoc);
2337 
2338  // If ParseParenExpression parsed a '(typename)' sequence only, then this is
2339  // a type.
2340  if (ExprType == CastExpr) {
2341  isCastExpr = true;
2342  return ExprEmpty();
2343  }
2344 
2345  if (getLangOpts().CPlusPlus || OpTok.isNot(tok::kw_typeof)) {
2346  // GNU typeof in C requires the expression to be parenthesized. Not so for
2347  // sizeof/alignof or in C++. Therefore, the parenthesized expression is
2348  // the start of a unary-expression, but doesn't include any postfix
2349  // pieces. Parse these now if present.
2350  if (!Operand.isInvalid())
2351  Operand = ParsePostfixExpressionSuffix(Operand.get());
2352  }
2353  }
2354 
2355  // If we get here, the operand to the typeof/sizeof/alignof was an expression.
2356  isCastExpr = false;
2357  return Operand;
2358 }
2359 
2360 /// Parse a __builtin_sycl_unique_stable_name expression. Accepts a type-id as
2361 /// a parameter.
2362 ExprResult Parser::ParseSYCLUniqueStableNameExpression() {
2363  assert(Tok.is(tok::kw___builtin_sycl_unique_stable_name) &&
2364  "Not __builtin_sycl_unique_stable_name");
2365 
2366  SourceLocation OpLoc = ConsumeToken();
2367  BalancedDelimiterTracker T(*this, tok::l_paren);
2368 
2369  // __builtin_sycl_unique_stable_name expressions are always parenthesized.
2370  if (T.expectAndConsume(diag::err_expected_lparen_after,
2371  "__builtin_sycl_unique_stable_name"))
2372  return ExprError();
2373 
2374  TypeResult Ty = ParseTypeName();
2375 
2376  if (Ty.isInvalid()) {
2377  T.skipToEnd();
2378  return ExprError();
2379  }
2380 
2381  if (T.consumeClose())
2382  return ExprError();
2383 
2384  return Actions.ActOnSYCLUniqueStableNameExpr(OpLoc, T.getOpenLocation(),
2385  T.getCloseLocation(), Ty.get());
2386 }
2387 
2388 /// Parse a sizeof or alignof expression.
2389 ///
2390 /// \verbatim
2391 /// unary-expression: [C99 6.5.3]
2392 /// 'sizeof' unary-expression
2393 /// 'sizeof' '(' type-name ')'
2394 /// [C++11] 'sizeof' '...' '(' identifier ')'
2395 /// [GNU] '__alignof' unary-expression
2396 /// [GNU] '__alignof' '(' type-name ')'
2397 /// [C11] '_Alignof' '(' type-name ')'
2398 /// [C++11] 'alignof' '(' type-id ')'
2399 /// \endverbatim
2400 ExprResult Parser::ParseUnaryExprOrTypeTraitExpression() {
2401  assert(Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof,
2402  tok::kw__Alignof, tok::kw_vec_step,
2403  tok::kw___builtin_omp_required_simd_align) &&
2404  "Not a sizeof/alignof/vec_step expression!");
2405  Token OpTok = Tok;
2406  ConsumeToken();
2407 
2408  // [C++11] 'sizeof' '...' '(' identifier ')'
2409  if (Tok.is(tok::ellipsis) && OpTok.is(tok::kw_sizeof)) {
2410  SourceLocation EllipsisLoc = ConsumeToken();
2411  SourceLocation LParenLoc, RParenLoc;
2412  IdentifierInfo *Name = nullptr;
2413  SourceLocation NameLoc;
2414  if (Tok.is(tok::l_paren)) {
2415  BalancedDelimiterTracker T(*this, tok::l_paren);
2416  T.consumeOpen();
2417  LParenLoc = T.getOpenLocation();
2418  if (Tok.is(tok::identifier)) {
2419  Name = Tok.getIdentifierInfo();
2420  NameLoc = ConsumeToken();
2421  T.consumeClose();
2422  RParenLoc = T.getCloseLocation();
2423  if (RParenLoc.isInvalid())
2424  RParenLoc = PP.getLocForEndOfToken(NameLoc);
2425  } else {
2426  Diag(Tok, diag::err_expected_parameter_pack);
2427  SkipUntil(tok::r_paren, StopAtSemi);
2428  }
2429  } else if (Tok.is(tok::identifier)) {
2430  Name = Tok.getIdentifierInfo();
2431  NameLoc = ConsumeToken();
2432  LParenLoc = PP.getLocForEndOfToken(EllipsisLoc);
2433  RParenLoc = PP.getLocForEndOfToken(NameLoc);
2434  Diag(LParenLoc, diag::err_paren_sizeof_parameter_pack)
2435  << Name
2436  << FixItHint::CreateInsertion(LParenLoc, "(")
2437  << FixItHint::CreateInsertion(RParenLoc, ")");
2438  } else {
2439  Diag(Tok, diag::err_sizeof_parameter_pack);
2440  }
2441 
2442  if (!Name)
2443  return ExprError();
2444 
2448 
2449  return Actions.ActOnSizeofParameterPackExpr(getCurScope(),
2450  OpTok.getLocation(),
2451  *Name, NameLoc,
2452  RParenLoc);
2453  }
2454 
2455  if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof))
2456  Diag(OpTok, diag::warn_cxx98_compat_alignof);
2457 
2461 
2462  bool isCastExpr;
2463  ParsedType CastTy;
2464  SourceRange CastRange;
2465  ExprResult Operand = ParseExprAfterUnaryExprOrTypeTrait(OpTok,
2466  isCastExpr,
2467  CastTy,
2468  CastRange);
2469 
2470  UnaryExprOrTypeTrait ExprKind = UETT_SizeOf;
2471  if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof))
2472  ExprKind = UETT_AlignOf;
2473  else if (OpTok.is(tok::kw___alignof))
2474  ExprKind = UETT_PreferredAlignOf;
2475  else if (OpTok.is(tok::kw_vec_step))
2476  ExprKind = UETT_VecStep;
2477  else if (OpTok.is(tok::kw___builtin_omp_required_simd_align))
2478  ExprKind = UETT_OpenMPRequiredSimdAlign;
2479 
2480  if (isCastExpr)
2481  return Actions.ActOnUnaryExprOrTypeTraitExpr(OpTok.getLocation(),
2482  ExprKind,
2483  /*IsType=*/true,
2484  CastTy.getAsOpaquePtr(),
2485  CastRange);
2486 
2487  if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof))
2488  Diag(OpTok, diag::ext_alignof_expr) << OpTok.getIdentifierInfo();
2489 
2490  // If we get here, the operand to the sizeof/alignof was an expression.
2491  if (!Operand.isInvalid())
2493  ExprKind,
2494  /*IsType=*/false,
2495  Operand.get(),
2496  CastRange);
2497  return Operand;
2498 }
2499 
2500 /// ParseBuiltinPrimaryExpression
2501 ///
2502 /// \verbatim
2503 /// primary-expression: [C99 6.5.1]
2504 /// [GNU] '__builtin_va_arg' '(' assignment-expression ',' type-name ')'
2505 /// [GNU] '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')'
2506 /// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ','
2507 /// assign-expr ')'
2508 /// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')'
2509 /// [GNU] '__builtin_FILE' '(' ')'
2510 /// [GNU] '__builtin_FUNCTION' '(' ')'
2511 /// [GNU] '__builtin_LINE' '(' ')'
2512 /// [CLANG] '__builtin_COLUMN' '(' ')'
2513 /// [GNU] '__builtin_source_location' '(' ')'
2514 /// [OCL] '__builtin_astype' '(' assignment-expression ',' type-name ')'
2515 ///
2516 /// [GNU] offsetof-member-designator:
2517 /// [GNU] identifier
2518 /// [GNU] offsetof-member-designator '.' identifier
2519 /// [GNU] offsetof-member-designator '[' expression ']'
2520 /// \endverbatim
2521 ExprResult Parser::ParseBuiltinPrimaryExpression() {
2522  ExprResult Res;
2523  const IdentifierInfo *BuiltinII = Tok.getIdentifierInfo();
2524 
2525  tok::TokenKind T = Tok.getKind();
2526  SourceLocation StartLoc = ConsumeToken(); // Eat the builtin identifier.
2527 
2528  // All of these start with an open paren.
2529  if (Tok.isNot(tok::l_paren))
2530  return ExprError(Diag(Tok, diag::err_expected_after) << BuiltinII
2531  << tok::l_paren);
2532 
2533  BalancedDelimiterTracker PT(*this, tok::l_paren);
2534  PT.consumeOpen();
2535 
2536  // TODO: Build AST.
2537 
2538  switch (T) {
2539  default: llvm_unreachable("Not a builtin primary expression!");
2540  case tok::kw___builtin_va_arg: {
2542 
2543  if (ExpectAndConsume(tok::comma)) {
2544  SkipUntil(tok::r_paren, StopAtSemi);
2545  Expr = ExprError();
2546  }
2547 
2548  TypeResult Ty = ParseTypeName();
2549 
2550  if (Tok.isNot(tok::r_paren)) {
2551  Diag(Tok, diag::err_expected) << tok::r_paren;
2552  Expr = ExprError();
2553  }
2554 
2555  if (Expr.isInvalid() || Ty.isInvalid())
2556  Res = ExprError();
2557  else
2558  Res = Actions.ActOnVAArg(StartLoc, Expr.get(), Ty.get(), ConsumeParen());
2559  break;
2560  }
2561  case tok::kw___builtin_offsetof: {
2563  TypeResult Ty = ParseTypeName();
2564  if (Ty.isInvalid()) {
2565  SkipUntil(tok::r_paren, StopAtSemi);
2566  return ExprError();
2567  }
2568 
2569  if (ExpectAndConsume(tok::comma)) {
2570  SkipUntil(tok::r_paren, StopAtSemi);
2571  return ExprError();
2572  }
2573 
2574  // We must have at least one identifier here.
2575  if (Tok.isNot(tok::identifier)) {
2576  Diag(Tok, diag::err_expected) << tok::identifier;
2577  SkipUntil(tok::r_paren, StopAtSemi);
2578  return ExprError();
2579  }
2580 
2581  // Keep track of the various subcomponents we see.
2583 
2584  Comps.push_back(Sema::OffsetOfComponent());
2585  Comps.back().isBrackets = false;
2586  Comps.back().U.IdentInfo = Tok.getIdentifierInfo();
2587  Comps.back().LocStart = Comps.back().LocEnd = ConsumeToken();
2588 
2589  // FIXME: This loop leaks the index expressions on error.
2590  while (true) {
2591  if (Tok.is(tok::period)) {
2592  // offsetof-member-designator: offsetof-member-designator '.' identifier
2593  Comps.push_back(Sema::OffsetOfComponent());
2594  Comps.back().isBrackets = false;
2595  Comps.back().LocStart = ConsumeToken();
2596 
2597  if (Tok.isNot(tok::identifier)) {
2598  Diag(Tok, diag::err_expected) << tok::identifier;
2599  SkipUntil(tok::r_paren, StopAtSemi);
2600  return ExprError();
2601  }
2602  Comps.back().U.IdentInfo = Tok.getIdentifierInfo();
2603  Comps.back().LocEnd = ConsumeToken();
2604 
2605  } else if (Tok.is(tok::l_square)) {
2606  if (CheckProhibitedCXX11Attribute())
2607  return ExprError();
2608 
2609  // offsetof-member-designator: offsetof-member-design '[' expression ']'
2610  Comps.push_back(Sema::OffsetOfComponent());
2611  Comps.back().isBrackets = true;
2612  BalancedDelimiterTracker ST(*this, tok::l_square);
2613  ST.consumeOpen();
2614  Comps.back().LocStart = ST.getOpenLocation();
2615  Res = ParseExpression();
2616  if (Res.isInvalid()) {
2617  SkipUntil(tok::r_paren, StopAtSemi);
2618  return Res;
2619  }
2620  Comps.back().U.E = Res.get();
2621 
2622  ST.consumeClose();
2623  Comps.back().LocEnd = ST.getCloseLocation();
2624  } else {
2625  if (Tok.isNot(tok::r_paren)) {
2626  PT.consumeClose();
2627  Res = ExprError();
2628  } else if (Ty.isInvalid()) {
2629  Res = ExprError();
2630  } else {
2631  PT.consumeClose();
2632  Res = Actions.ActOnBuiltinOffsetOf(getCurScope(), StartLoc, TypeLoc,
2633  Ty.get(), Comps,
2634  PT.getCloseLocation());
2635  }
2636  break;
2637  }
2638  }
2639  break;
2640  }
2641  case tok::kw___builtin_choose_expr: {
2643  if (Cond.isInvalid()) {
2644  SkipUntil(tok::r_paren, StopAtSemi);
2645  return Cond;
2646  }
2647  if (ExpectAndConsume(tok::comma)) {
2648  SkipUntil(tok::r_paren, StopAtSemi);
2649  return ExprError();
2650  }
2651 
2653  if (Expr1.isInvalid()) {
2654  SkipUntil(tok::r_paren, StopAtSemi);
2655  return Expr1;
2656  }
2657  if (ExpectAndConsume(tok::comma)) {
2658  SkipUntil(tok::r_paren, StopAtSemi);
2659  return ExprError();
2660  }
2661 
2663  if (Expr2.isInvalid()) {
2664  SkipUntil(tok::r_paren, StopAtSemi);
2665  return Expr2;
2666  }
2667  if (Tok.isNot(tok::r_paren)) {
2668  Diag(Tok, diag::err_expected) << tok::r_paren;
2669  return ExprError();
2670  }
2671  Res = Actions.ActOnChooseExpr(StartLoc, Cond.get(), Expr1.get(),
2672  Expr2.get(), ConsumeParen());
2673  break;
2674  }
2675  case tok::kw___builtin_astype: {
2676  // The first argument is an expression to be converted, followed by a comma.
2678  if (Expr.isInvalid()) {
2679  SkipUntil(tok::r_paren, StopAtSemi);
2680  return ExprError();
2681  }
2682 
2683  if (ExpectAndConsume(tok::comma)) {
2684  SkipUntil(tok::r_paren, StopAtSemi);
2685  return ExprError();
2686  }
2687 
2688  // Second argument is the type to bitcast to.
2689  TypeResult DestTy = ParseTypeName();
2690  if (DestTy.isInvalid())
2691  return ExprError();
2692 
2693  // Attempt to consume the r-paren.
2694  if (Tok.isNot(tok::r_paren)) {
2695  Diag(Tok, diag::err_expected) << tok::r_paren;
2696  SkipUntil(tok::r_paren, StopAtSemi);
2697  return ExprError();
2698  }
2699 
2700  Res = Actions.ActOnAsTypeExpr(Expr.get(), DestTy.get(), StartLoc,
2701  ConsumeParen());
2702  break;
2703  }
2704  case tok::kw___builtin_convertvector: {
2705  // The first argument is an expression to be converted, followed by a comma.
2707  if (Expr.isInvalid()) {
2708  SkipUntil(tok::r_paren, StopAtSemi);
2709  return ExprError();
2710  }
2711 
2712  if (ExpectAndConsume(tok::comma)) {
2713  SkipUntil(tok::r_paren, StopAtSemi);
2714  return ExprError();
2715  }
2716 
2717  // Second argument is the type to bitcast to.
2718  TypeResult DestTy = ParseTypeName();
2719  if (DestTy.isInvalid())
2720  return ExprError();
2721 
2722  // Attempt to consume the r-paren.
2723  if (Tok.isNot(tok::r_paren)) {
2724  Diag(Tok, diag::err_expected) << tok::r_paren;
2725  SkipUntil(tok::r_paren, StopAtSemi);
2726  return ExprError();
2727  }
2728 
2729  Res = Actions.ActOnConvertVectorExpr(Expr.get(), DestTy.get(), StartLoc,
2730  ConsumeParen());
2731  break;
2732  }
2733  case tok::kw___builtin_COLUMN:
2734  case tok::kw___builtin_FILE:
2735  case tok::kw___builtin_FUNCTION:
2736  case tok::kw___builtin_LINE:
2737  case tok::kw___builtin_source_location: {
2738  // Attempt to consume the r-paren.
2739  if (Tok.isNot(tok::r_paren)) {
2740  Diag(Tok, diag::err_expected) << tok::r_paren;
2741  SkipUntil(tok::r_paren, StopAtSemi);
2742  return ExprError();
2743  }
2745  switch (T) {
2746  case tok::kw___builtin_FILE:
2747  return SourceLocExpr::File;
2748  case tok::kw___builtin_FUNCTION:
2749  return SourceLocExpr::Function;
2750  case tok::kw___builtin_LINE:
2751  return SourceLocExpr::Line;
2752  case tok::kw___builtin_COLUMN:
2753  return SourceLocExpr::Column;
2754  case tok::kw___builtin_source_location:
2756  default:
2757  llvm_unreachable("invalid keyword");
2758  }
2759  }();
2760  Res = Actions.ActOnSourceLocExpr(Kind, StartLoc, ConsumeParen());
2761  break;
2762  }
2763  }
2764 
2765  if (Res.isInvalid())
2766  return ExprError();
2767 
2768  // These can be followed by postfix-expr pieces because they are
2769  // primary-expressions.
2770  return ParsePostfixExpressionSuffix(Res.get());
2771 }
2772 
2773 bool Parser::tryParseOpenMPArrayShapingCastPart() {
2774  assert(Tok.is(tok::l_square) && "Expected open bracket");
2775  bool ErrorFound = true;
2776  TentativeParsingAction TPA(*this);
2777  do {
2778  if (Tok.isNot(tok::l_square))
2779  break;
2780  // Consume '['
2781  ConsumeBracket();
2782  // Skip inner expression.
2783  while (!SkipUntil(tok::r_square, tok::annot_pragma_openmp_end,
2785  ;
2786  if (Tok.isNot(tok::r_square))
2787  break;
2788  // Consume ']'
2789  ConsumeBracket();
2790  // Found ')' - done.
2791  if (Tok.is(tok::r_paren)) {
2792  ErrorFound = false;
2793  break;
2794  }
2795  } while (Tok.isNot(tok::annot_pragma_openmp_end));
2796  TPA.Revert();
2797  return !ErrorFound;
2798 }
2799 
2800 /// ParseParenExpression - This parses the unit that starts with a '(' token,
2801 /// based on what is allowed by ExprType. The actual thing parsed is returned
2802 /// in ExprType. If stopIfCastExpr is true, it will only return the parsed type,
2803 /// not the parsed cast-expression.
2804 ///
2805 /// \verbatim
2806 /// primary-expression: [C99 6.5.1]
2807 /// '(' expression ')'
2808 /// [GNU] '(' compound-statement ')' (if !ParenExprOnly)
2809 /// postfix-expression: [C99 6.5.2]
2810 /// '(' type-name ')' '{' initializer-list '}'
2811 /// '(' type-name ')' '{' initializer-list ',' '}'
2812 /// cast-expression: [C99 6.5.4]
2813 /// '(' type-name ')' cast-expression
2814 /// [ARC] bridged-cast-expression
2815 /// [ARC] bridged-cast-expression:
2816 /// (__bridge type-name) cast-expression
2817 /// (__bridge_transfer type-name) cast-expression
2818 /// (__bridge_retained type-name) cast-expression
2819 /// fold-expression: [C++1z]
2820 /// '(' cast-expression fold-operator '...' ')'
2821 /// '(' '...' fold-operator cast-expression ')'
2822 /// '(' cast-expression fold-operator '...'
2823 /// fold-operator cast-expression ')'
2824 /// [OPENMP] Array shaping operation
2825 /// '(' '[' expression ']' { '[' expression ']' } cast-expression
2826 /// \endverbatim
2827 ExprResult
2828 Parser::ParseParenExpression(ParenParseOption &ExprType, bool stopIfCastExpr,
2829  bool isTypeCast, ParsedType &CastTy,
2830  SourceLocation &RParenLoc) {
2831  assert(Tok.is(tok::l_paren) && "Not a paren expr!");
2832  ColonProtectionRAIIObject ColonProtection(*this, false);
2833  BalancedDelimiterTracker T(*this, tok::l_paren);
2834  if (T.consumeOpen())
2835  return ExprError();
2836  SourceLocation OpenLoc = T.getOpenLocation();
2837 
2838  PreferredType.enterParenExpr(Tok.getLocation(), OpenLoc);
2839 
2840  ExprResult Result(true);
2841  bool isAmbiguousTypeId;
2842  CastTy = nullptr;
2843 
2844  if (Tok.is(tok::code_completion)) {
2845  cutOffParsing();
2846  Actions.CodeCompleteExpression(
2847  getCurScope(), PreferredType.get(Tok.getLocation()),
2848  /*IsParenthesized=*/ExprType >= CompoundLiteral);
2849  return ExprError();
2850  }
2851 
2852  // Diagnose use of bridge casts in non-arc mode.
2853  bool BridgeCast = (getLangOpts().ObjC &&
2854  Tok.isOneOf(tok::kw___bridge,
2855  tok::kw___bridge_transfer,
2856  tok::kw___bridge_retained,
2857  tok::kw___bridge_retain));
2858  if (BridgeCast && !getLangOpts().ObjCAutoRefCount) {
2859  if (!TryConsumeToken(tok::kw___bridge)) {
2860  StringRef BridgeCastName = Tok.getName();
2861  SourceLocation BridgeKeywordLoc = ConsumeToken();
2862  if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc))
2863  Diag(BridgeKeywordLoc, diag::warn_arc_bridge_cast_nonarc)
2864  << BridgeCastName
2865  << FixItHint::CreateReplacement(BridgeKeywordLoc, "");
2866  }
2867  BridgeCast = false;
2868  }
2869 
2870  // None of these cases should fall through with an invalid Result
2871  // unless they've already reported an error.
2872  if (ExprType >= CompoundStmt && Tok.is(tok::l_brace)) {
2873  Diag(Tok, diag::ext_gnu_statement_expr);
2874 
2875  checkCompoundToken(OpenLoc, tok::l_paren, CompoundToken::StmtExprBegin);
2876 
2877  if (!getCurScope()->getFnParent() && !getCurScope()->getBlockParent()) {
2878  Result = ExprError(Diag(OpenLoc, diag::err_stmtexpr_file_scope));
2879  } else {
2880  // Find the nearest non-record decl context. Variables declared in a
2881  // statement expression behave as if they were declared in the enclosing
2882  // function, block, or other code construct.
2883  DeclContext *CodeDC = Actions.CurContext;
2884  while (CodeDC->isRecord() || isa<EnumDecl>(CodeDC)) {
2885  CodeDC = CodeDC->getParent();
2886  assert(CodeDC && !CodeDC->isFileContext() &&
2887  "statement expr not in code context");
2888  }
2889  Sema::ContextRAII SavedContext(Actions, CodeDC, /*NewThisContext=*/false);
2890 
2891  Actions.ActOnStartStmtExpr();
2892 
2893  StmtResult Stmt(ParseCompoundStatement(true));
2894  ExprType = CompoundStmt;
2895 
2896  // If the substmt parsed correctly, build the AST node.
2897  if (!Stmt.isInvalid()) {
2898  Result = Actions.ActOnStmtExpr(getCurScope(), OpenLoc, Stmt.get(),
2899  Tok.getLocation());
2900  } else {
2901  Actions.ActOnStmtExprError();
2902  }
2903  }
2904  } else if (ExprType >= CompoundLiteral && BridgeCast) {
2905  tok::TokenKind tokenKind = Tok.getKind();
2906  SourceLocation BridgeKeywordLoc = ConsumeToken();
2907 
2908  // Parse an Objective-C ARC ownership cast expression.
2910  if (tokenKind == tok::kw___bridge)
2911  Kind = OBC_Bridge;
2912  else if (tokenKind == tok::kw___bridge_transfer)
2914  else if (tokenKind == tok::kw___bridge_retained)
2916  else {
2917  // As a hopefully temporary workaround, allow __bridge_retain as
2918  // a synonym for __bridge_retained, but only in system headers.
2919  assert(tokenKind == tok::kw___bridge_retain);
2921  if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc))
2922  Diag(BridgeKeywordLoc, diag::err_arc_bridge_retain)
2923  << FixItHint::CreateReplacement(BridgeKeywordLoc,
2924  "__bridge_retained");
2925  }
2926 
2927  TypeResult Ty = ParseTypeName();
2928  T.consumeClose();
2929  ColonProtection.restore();
2930  RParenLoc = T.getCloseLocation();
2931 
2932  PreferredType.enterTypeCast(Tok.getLocation(), Ty.get().get());
2933  ExprResult SubExpr = ParseCastExpression(AnyCastExpr);
2934 
2935  if (Ty.isInvalid() || SubExpr.isInvalid())
2936  return ExprError();
2937 
2938  return Actions.ActOnObjCBridgedCast(getCurScope(), OpenLoc, Kind,
2939  BridgeKeywordLoc, Ty.get(),
2940  RParenLoc, SubExpr.get());
2941  } else if (ExprType >= CompoundLiteral &&
2942  isTypeIdInParens(isAmbiguousTypeId)) {
2943 
2944  // Otherwise, this is a compound literal expression or cast expression.
2945 
2946  // In C++, if the type-id is ambiguous we disambiguate based on context.
2947  // If stopIfCastExpr is true the context is a typeof/sizeof/alignof
2948  // in which case we should treat it as type-id.
2949  // if stopIfCastExpr is false, we need to determine the context past the
2950  // parens, so we defer to ParseCXXAmbiguousParenExpression for that.
2951  if (isAmbiguousTypeId && !stopIfCastExpr) {
2952  ExprResult res = ParseCXXAmbiguousParenExpression(ExprType, CastTy, T,
2953  ColonProtection);
2954  RParenLoc = T.getCloseLocation();
2955  return res;
2956  }
2957 
2958  // Parse the type declarator.
2959  DeclSpec DS(AttrFactory);
2960  ParseSpecifierQualifierList(DS);
2961  Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName);
2962  ParseDeclarator(DeclaratorInfo);
2963 
2964  // If our type is followed by an identifier and either ':' or ']', then
2965  // this is probably an Objective-C message send where the leading '[' is
2966  // missing. Recover as if that were the case.
2967  if (!DeclaratorInfo.isInvalidType() && Tok.is(tok::identifier) &&
2968  !InMessageExpression && getLangOpts().ObjC &&
2969  (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) {
2970  TypeResult Ty;
2971  {
2972  InMessageExpressionRAIIObject InMessage(*this, false);
2973  Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
2974  }
2975  Result = ParseObjCMessageExpressionBody(SourceLocation(),
2976  SourceLocation(),
2977  Ty.get(), nullptr);
2978  } else {
2979  // Match the ')'.
2980  T.consumeClose();
2981  ColonProtection.restore();
2982  RParenLoc = T.getCloseLocation();
2983  if (Tok.is(tok::l_brace)) {
2984  ExprType = CompoundLiteral;
2985  TypeResult Ty;
2986  {
2987  InMessageExpressionRAIIObject InMessage(*this, false);
2988  Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
2989  }
2990  return ParseCompoundLiteralExpression(Ty.get(), OpenLoc, RParenLoc);
2991  }
2992 
2993  if (Tok.is(tok::l_paren)) {
2994  // This could be OpenCL vector Literals
2995  if (getLangOpts().OpenCL)
2996  {
2997  TypeResult Ty;
2998  {
2999  InMessageExpressionRAIIObject InMessage(*this, false);
3000  Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
3001  }
3002  if(Ty.isInvalid())
3003  {
3004  return ExprError();
3005  }
3006  QualType QT = Ty.get().get().getCanonicalType();
3007  if (QT->isVectorType())
3008  {
3009  // We parsed '(' vector-type-name ')' followed by '('
3010 
3011  // Parse the cast-expression that follows it next.
3012  // isVectorLiteral = true will make sure we don't parse any
3013  // Postfix expression yet
3014  Result = ParseCastExpression(/*isUnaryExpression=*/AnyCastExpr,
3015  /*isAddressOfOperand=*/false,
3016  /*isTypeCast=*/IsTypeCast,
3017  /*isVectorLiteral=*/true);
3018 
3019  if (!Result.isInvalid()) {
3020  Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc,
3021  DeclaratorInfo, CastTy,
3022  RParenLoc, Result.get());
3023  }
3024 
3025  // After we performed the cast we can check for postfix-expr pieces.
3026  if (!Result.isInvalid()) {
3027  Result = ParsePostfixExpressionSuffix(Result);
3028  }
3029 
3030  return Result;
3031  }
3032  }
3033  }
3034 
3035  if (ExprType == CastExpr) {
3036  // We parsed '(' type-name ')' and the thing after it wasn't a '{'.
3037 
3038  if (DeclaratorInfo.isInvalidType())
3039  return ExprError();
3040 
3041  // Note that this doesn't parse the subsequent cast-expression, it just
3042  // returns the parsed type to the callee.
3043  if (stopIfCastExpr) {
3044  TypeResult Ty;
3045  {
3046  InMessageExpressionRAIIObject InMessage(*this, false);
3047  Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
3048  }
3049  CastTy = Ty.get();
3050  return ExprResult();
3051  }
3052 
3053  // Reject the cast of super idiom in ObjC.
3054  if (Tok.is(tok::identifier) && getLangOpts().ObjC &&
3055  Tok.getIdentifierInfo() == Ident_super &&
3056  getCurScope()->isInObjcMethodScope() &&
3057  GetLookAheadToken(1).isNot(tok::period)) {
3058  Diag(Tok.getLocation(), diag::err_illegal_super_cast)
3059  << SourceRange(OpenLoc, RParenLoc);
3060  return ExprError();
3061  }
3062 
3063  PreferredType.enterTypeCast(Tok.getLocation(), CastTy.get());
3064  // Parse the cast-expression that follows it next.
3065  // TODO: For cast expression with CastTy.
3066  Result = ParseCastExpression(/*isUnaryExpression=*/AnyCastExpr,
3067  /*isAddressOfOperand=*/false,
3068  /*isTypeCast=*/IsTypeCast);
3069  if (!Result.isInvalid()) {
3070  Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc,
3071  DeclaratorInfo, CastTy,
3072  RParenLoc, Result.get());
3073  }
3074  return Result;
3075  }
3076 
3077  Diag(Tok, diag::err_expected_lbrace_in_compound_literal);
3078  return ExprError();
3079  }
3080  } else if (ExprType >= FoldExpr && Tok.is(tok::ellipsis) &&
3081  isFoldOperator(NextToken().getKind())) {
3082  ExprType = FoldExpr;
3083  return ParseFoldExpression(ExprResult(), T);
3084  } else if (isTypeCast) {
3085  // Parse the expression-list.
3086  InMessageExpressionRAIIObject InMessage(*this, false);
3087 
3088  ExprVector ArgExprs;
3089  CommaLocsTy CommaLocs;
3090 
3091  if (!ParseSimpleExpressionList(ArgExprs, CommaLocs)) {
3092  // FIXME: If we ever support comma expressions as operands to
3093  // fold-expressions, we'll need to allow multiple ArgExprs here.
3094  if (ExprType >= FoldExpr && ArgExprs.size() == 1 &&
3095  isFoldOperator(Tok.getKind()) && NextToken().is(tok::ellipsis)) {
3096  ExprType = FoldExpr;
3097  return ParseFoldExpression(ArgExprs[0], T);
3098  }
3099 
3100  ExprType = SimpleExpr;
3101  Result = Actions.ActOnParenListExpr(OpenLoc, Tok.getLocation(),
3102  ArgExprs);
3103  }
3104  } else if (getLangOpts().OpenMP >= 50 && OpenMPDirectiveParsing &&
3105  ExprType == CastExpr && Tok.is(tok::l_square) &&
3106  tryParseOpenMPArrayShapingCastPart()) {
3107  bool ErrorFound = false;
3108  SmallVector<Expr *, 4> OMPDimensions;
3109  SmallVector<SourceRange, 4> OMPBracketsRanges;
3110  do {
3111  BalancedDelimiterTracker TS(*this, tok::l_square);
3112  TS.consumeOpen();
3113  ExprResult NumElements =
3115  if (!NumElements.isUsable()) {
3116  ErrorFound = true;
3117  while (!SkipUntil(tok::r_square, tok::r_paren,
3119  ;
3120  }
3121  TS.consumeClose();
3122  OMPDimensions.push_back(NumElements.get());
3123  OMPBracketsRanges.push_back(TS.getRange());
3124  } while (Tok.isNot(tok::r_paren));
3125  // Match the ')'.
3126  T.consumeClose();
3127  RParenLoc = T.getCloseLocation();
3129  if (ErrorFound) {
3130  Result = ExprError();
3131  } else if (!Result.isInvalid()) {
3132  Result = Actions.ActOnOMPArrayShapingExpr(
3133  Result.get(), OpenLoc, RParenLoc, OMPDimensions, OMPBracketsRanges);
3134  }
3135  return Result;
3136  } else {
3137  InMessageExpressionRAIIObject InMessage(*this, false);
3138 
3139  Result = ParseExpression(MaybeTypeCast);
3140  if (!getLangOpts().CPlusPlus && MaybeTypeCast && Result.isUsable()) {
3141  // Correct typos in non-C++ code earlier so that implicit-cast-like
3142  // expressions are parsed correctly.
3143  Result = Actions.CorrectDelayedTyposInExpr(Result);
3144  }
3145 
3146  if (ExprType >= FoldExpr && isFoldOperator(Tok.getKind()) &&
3147  NextToken().is(tok::ellipsis)) {
3148  ExprType = FoldExpr;
3149  return ParseFoldExpression(Result, T);
3150  }
3151  ExprType = SimpleExpr;
3152 
3153  // Don't build a paren expression unless we actually match a ')'.
3154  if (!Result.isInvalid() && Tok.is(tok::r_paren))
3155  Result =
3156  Actions.ActOnParenExpr(OpenLoc, Tok.getLocation(), Result.get());
3157  }
3158 
3159  // Match the ')'.
3160  if (Result.isInvalid()) {
3161  SkipUntil(tok::r_paren, StopAtSemi);
3162  return ExprError();
3163  }
3164 
3165  T.consumeClose();
3166  RParenLoc = T.getCloseLocation();
3167  return Result;
3168 }
3169 
3170 /// ParseCompoundLiteralExpression - We have parsed the parenthesized type-name
3171 /// and we are at the left brace.
3172 ///
3173 /// \verbatim
3174 /// postfix-expression: [C99 6.5.2]
3175 /// '(' type-name ')' '{' initializer-list '}'
3176 /// '(' type-name ')' '{' initializer-list ',' '}'
3177 /// \endverbatim
3178 ExprResult
3179 Parser::ParseCompoundLiteralExpression(ParsedType Ty,
3180  SourceLocation LParenLoc,
3181  SourceLocation RParenLoc) {
3182  assert(Tok.is(tok::l_brace) && "Not a compound literal!");
3183  if (!getLangOpts().C99) // Compound literals don't exist in C90.
3184  Diag(LParenLoc, diag::ext_c99_compound_literal);
3185  PreferredType.enterTypeCast(Tok.getLocation(), Ty.get());
3186  ExprResult Result = ParseInitializer();
3187  if (!Result.isInvalid() && Ty)
3188  return Actions.ActOnCompoundLiteral(LParenLoc, Ty, RParenLoc, Result.get());
3189  return Result;
3190 }
3191 
3192 /// ParseStringLiteralExpression - This handles the various token types that
3193 /// form string literals, and also handles string concatenation [C99 5.1.1.2,
3194 /// translation phase #6].
3195 ///
3196 /// \verbatim
3197 /// primary-expression: [C99 6.5.1]
3198 /// string-literal
3199 /// \verbatim
3200 ExprResult Parser::ParseStringLiteralExpression(bool AllowUserDefinedLiteral) {
3201  assert(isTokenStringLiteral() && "Not a string literal!");
3202 
3203  // String concat. Note that keywords like __func__ and __FUNCTION__ are not
3204  // considered to be strings for concatenation purposes.
3205  SmallVector<Token, 4> StringToks;
3206 
3207  do {
3208  StringToks.push_back(Tok);
3209  ConsumeStringToken();
3210  } while (isTokenStringLiteral());
3211 
3212  // Pass the set of string tokens, ready for concatenation, to the actions.
3213  return Actions.ActOnStringLiteral(StringToks,
3214  AllowUserDefinedLiteral ? getCurScope()
3215  : nullptr);
3216 }
3217 
3218 /// ParseGenericSelectionExpression - Parse a C11 generic-selection
3219 /// [C11 6.5.1.1].
3220 ///
3221 /// \verbatim
3222 /// generic-selection:
3223 /// _Generic ( assignment-expression , generic-assoc-list )
3224 /// generic-assoc-list:
3225 /// generic-association
3226 /// generic-assoc-list , generic-association
3227 /// generic-association:
3228 /// type-name : assignment-expression
3229 /// default : assignment-expression
3230 /// \endverbatim
3231 ExprResult Parser::ParseGenericSelectionExpression() {
3232  assert(Tok.is(tok::kw__Generic) && "_Generic keyword expected");
3233  if (!getLangOpts().C11)
3234  Diag(Tok, diag::ext_c11_feature) << Tok.getName();
3235 
3236  SourceLocation KeyLoc = ConsumeToken();
3237  BalancedDelimiterTracker T(*this, tok::l_paren);
3238  if (T.expectAndConsume())
3239  return ExprError();
3240 
3241  ExprResult ControllingExpr;
3242  {
3243  // C11 6.5.1.1p3 "The controlling expression of a generic selection is
3244  // not evaluated."
3247  ControllingExpr =
3249  if (ControllingExpr.isInvalid()) {
3250  SkipUntil(tok::r_paren, StopAtSemi);
3251  return ExprError();
3252  }
3253  }
3254 
3255  if (ExpectAndConsume(tok::comma)) {
3256  SkipUntil(tok::r_paren, StopAtSemi);
3257  return ExprError();
3258  }
3259 
3260  SourceLocation DefaultLoc;
3261  TypeVector Types;
3262  ExprVector Exprs;
3263  do {
3264  ParsedType Ty;
3265  if (Tok.is(tok::kw_default)) {
3266  // C11 6.5.1.1p2 "A generic selection shall have no more than one default
3267  // generic association."
3268  if (!DefaultLoc.isInvalid()) {
3269  Diag(Tok, diag::err_duplicate_default_assoc);
3270  Diag(DefaultLoc, diag::note_previous_default_assoc);
3271  SkipUntil(tok::r_paren, StopAtSemi);
3272  return ExprError();
3273  }
3274  DefaultLoc = ConsumeToken();
3275  Ty = nullptr;
3276  } else {
3278  TypeResult TR = ParseTypeName();
3279  if (TR.isInvalid()) {
3280  SkipUntil(tok::r_paren, StopAtSemi);
3281  return ExprError();
3282  }
3283  Ty = TR.get();
3284  }
3285  Types.push_back(Ty);
3286 
3287  if (ExpectAndConsume(tok::colon)) {
3288  SkipUntil(tok::r_paren, StopAtSemi);
3289  return ExprError();
3290  }
3291 
3292  // FIXME: These expressions should be parsed in a potentially potentially
3293  // evaluated context.
3294  ExprResult ER(
3296  if (ER.isInvalid()) {
3297  SkipUntil(tok::r_paren, StopAtSemi);
3298  return ExprError();
3299  }
3300  Exprs.push_back(ER.get());
3301  } while (TryConsumeToken(tok::comma));
3302 
3303  T.consumeClose();
3304  if (T.getCloseLocation().isInvalid())
3305  return ExprError();
3306 
3307  return Actions.ActOnGenericSelectionExpr(KeyLoc, DefaultLoc,
3308  T.getCloseLocation(),
3309  ControllingExpr.get(),
3310  Types, Exprs);
3311 }
3312 
3313 /// Parse A C++1z fold-expression after the opening paren and optional
3314 /// left-hand-side expression.
3315 ///
3316 /// \verbatim
3317 /// fold-expression:
3318 /// ( cast-expression fold-operator ... )
3319 /// ( ... fold-operator cast-expression )
3320 /// ( cast-expression fold-operator ... fold-operator cast-expression )
3321 ExprResult Parser::ParseFoldExpression(ExprResult LHS,
3323  if (LHS.isInvalid()) {
3324  T.skipToEnd();
3325  return true;
3326  }
3327 
3328  tok::TokenKind Kind = tok::unknown;
3329  SourceLocation FirstOpLoc;
3330  if (LHS.isUsable()) {
3331  Kind = Tok.getKind();
3332  assert(isFoldOperator(Kind) && "missing fold-operator");
3333  FirstOpLoc = ConsumeToken();
3334  }
3335 
3336  assert(Tok.is(tok::ellipsis) && "not a fold-expression");
3337  SourceLocation EllipsisLoc = ConsumeToken();
3338 
3339  ExprResult RHS;
3340  if (Tok.isNot(tok::r_paren)) {
3341  if (!isFoldOperator(Tok.getKind()))
3342  return Diag(Tok.getLocation(), diag::err_expected_fold_operator);
3343 
3344  if (Kind != tok::unknown && Tok.getKind() != Kind)
3345  Diag(Tok.getLocation(), diag::err_fold_operator_mismatch)
3346  << SourceRange(FirstOpLoc);
3347  Kind = Tok.getKind();
3348  ConsumeToken();
3349 
3350  RHS = ParseExpression();
3351  if (RHS.isInvalid()) {
3352  T.skipToEnd();
3353  return true;
3354  }
3355  }
3356 
3357  Diag(EllipsisLoc, getLangOpts().CPlusPlus17
3358  ? diag::warn_cxx14_compat_fold_expression
3359  : diag::ext_fold_expression);
3360 
3361  T.consumeClose();
3362  return Actions.ActOnCXXFoldExpr(getCurScope(), T.getOpenLocation(), LHS.get(),
3363  Kind, EllipsisLoc, RHS.get(),
3364  T.getCloseLocation());
3365 }
3366 
3367 /// ParseExpressionList - Used for C/C++ (argument-)expression-list.
3368 ///
3369 /// \verbatim
3370 /// argument-expression-list:
3371 /// assignment-expression
3372 /// argument-expression-list , assignment-expression
3373 ///
3374 /// [C++] expression-list:
3375 /// [C++] assignment-expression
3376 /// [C++] expression-list , assignment-expression
3377 ///
3378 /// [C++0x] expression-list:
3379 /// [C++0x] initializer-list
3380 ///
3381 /// [C++0x] initializer-list
3382 /// [C++0x] initializer-clause ...[opt]
3383 /// [C++0x] initializer-list , initializer-clause ...[opt]
3384 ///
3385 /// [C++0x] initializer-clause:
3386 /// [C++0x] assignment-expression
3387 /// [C++0x] braced-init-list
3388 /// \endverbatim
3389 bool Parser::ParseExpressionList(SmallVectorImpl<Expr *> &Exprs,
3391  llvm::function_ref<void()> ExpressionStarts,
3392  bool FailImmediatelyOnInvalidExpr,
3393  bool EarlyTypoCorrection) {
3394  bool SawError = false;
3395  while (true) {
3396  if (ExpressionStarts)
3397  ExpressionStarts();
3398 
3399  ExprResult Expr;
3400  if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
3401  Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
3402  Expr = ParseBraceInitializer();
3403  } else
3405 
3406  if (EarlyTypoCorrection)
3407  Expr = Actions.CorrectDelayedTyposInExpr(Expr);
3408 
3409  if (Tok.is(tok::ellipsis))
3410  Expr = Actions.ActOnPackExpansion(Expr.get(), ConsumeToken());
3411  else if (Tok.is(tok::code_completion)) {
3412  // There's nothing to suggest in here as we parsed a full expression.
3413  // Instead fail and propogate the error since caller might have something
3414  // the suggest, e.g. signature help in function call. Note that this is
3415  // performed before pushing the \p Expr, so that signature help can report
3416  // current argument correctly.
3417  SawError = true;
3418  cutOffParsing();
3419  break;
3420  }
3421  if (Expr.isInvalid()) {
3422  SawError = true;
3423  if (FailImmediatelyOnInvalidExpr)
3424  break;
3425  SkipUntil(tok::comma, tok::r_paren, StopBeforeMatch);
3426  } else {
3427  Exprs.push_back(Expr.get());
3428  }
3429 
3430  if (Tok.isNot(tok::comma))
3431  break;
3432  // Move to the next argument, remember where the comma was.
3433  Token Comma = Tok;
3434  CommaLocs.push_back(ConsumeToken());
3435 
3436  checkPotentialAngleBracketDelimiter(Comma);
3437  }
3438  if (SawError) {
3439  // Ensure typos get diagnosed when errors were encountered while parsing the
3440  // expression list.
3441  for (auto &E : Exprs) {
3443  if (Expr.isUsable()) E = Expr.get();
3444  }
3445  }
3446  return SawError;
3447 }
3448 
3449 /// ParseSimpleExpressionList - A simple comma-separated list of expressions,
3450 /// used for misc language extensions.
3451 ///
3452 /// \verbatim
3453 /// simple-expression-list:
3454 /// assignment-expression
3455 /// simple-expression-list , assignment-expression
3456 /// \endverbatim
3457 bool
3458 Parser::ParseSimpleExpressionList(SmallVectorImpl<Expr*> &Exprs,
3459  SmallVectorImpl<SourceLocation> &CommaLocs) {
3460  while (true) {
3462  if (Expr.isInvalid())
3463  return true;
3464 
3465  Exprs.push_back(Expr.get());
3466 
3467  if (Tok.isNot(tok::comma))
3468  return false;
3469 
3470  // Move to the next argument, remember where the comma was.
3471  Token Comma = Tok;
3472  CommaLocs.push_back(ConsumeToken());
3473 
3474  checkPotentialAngleBracketDelimiter(Comma);
3475  }
3476 }
3477 
3478 /// ParseBlockId - Parse a block-id, which roughly looks like int (int x).
3479 ///
3480 /// \verbatim
3481 /// [clang] block-id:
3482 /// [clang] specifier-qualifier-list block-declarator
3483 /// \endverbatim
3484 void Parser::ParseBlockId(SourceLocation CaretLoc) {
3485  if (Tok.is(tok::code_completion)) {
3486  cutOffParsing();
3488  return;
3489  }
3490 
3491  // Parse the specifier-qualifier-list piece.
3492  DeclSpec DS(AttrFactory);
3493  ParseSpecifierQualifierList(DS);
3494 
3495  // Parse the block-declarator.
3496  Declarator DeclaratorInfo(DS, DeclaratorContext::BlockLiteral);
3497  DeclaratorInfo.setFunctionDefinitionKind(FunctionDefinitionKind::Definition);
3498  ParseDeclarator(DeclaratorInfo);
3499 
3500  MaybeParseGNUAttributes(DeclaratorInfo);
3501 
3502  // Inform sema that we are starting a block.
3503  Actions.ActOnBlockArguments(CaretLoc, DeclaratorInfo, getCurScope());
3504 }
3505 
3506 /// ParseBlockLiteralExpression - Parse a block literal, which roughly looks
3507 /// like ^(int x){ return x+1; }
3508 ///
3509 /// \verbatim
3510 /// block-literal:
3511 /// [clang] '^' block-args[opt] compound-statement
3512 /// [clang] '^' block-id compound-statement
3513 /// [clang] block-args:
3514 /// [clang] '(' parameter-list ')'
3515 /// \endverbatim
3516 ExprResult Parser::ParseBlockLiteralExpression() {
3517  assert(Tok.is(tok::caret) && "block literal starts with ^");
3518  SourceLocation CaretLoc = ConsumeToken();
3519 
3520  PrettyStackTraceLoc CrashInfo(PP.getSourceManager(), CaretLoc,
3521  "block literal parsing");
3522 
3523  // Enter a scope to hold everything within the block. This includes the
3524  // argument decls, decls within the compound expression, etc. This also
3525  // allows determining whether a variable reference inside the block is
3526  // within or outside of the block.
3527  ParseScope BlockScope(this, Scope::BlockScope | Scope::FnScope |
3529 
3530  // Inform sema that we are starting a block.
3531  Actions.ActOnBlockStart(CaretLoc, getCurScope());
3532 
3533  // Parse the return type if present.
3534  DeclSpec DS(AttrFactory);
3536  ParamInfo.setFunctionDefinitionKind(FunctionDefinitionKind::Definition);
3537  // FIXME: Since the return type isn't actually parsed, it can't be used to
3538  // fill ParamInfo with an initial valid range, so do it manually.
3539  ParamInfo.SetSourceRange(SourceRange(Tok.getLocation(), Tok.getLocation()));
3540 
3541  // If this block has arguments, parse them. There is no ambiguity here with
3542  // the expression case, because the expression case requires a parameter list.
3543  if (Tok.is(tok::l_paren)) {
3544  ParseParenDeclarator(ParamInfo);
3545  // Parse the pieces after the identifier as if we had "int(...)".
3546  // SetIdentifier sets the source range end, but in this case we're past
3547  // that location.
3548  SourceLocation Tmp = ParamInfo.getSourceRange().getEnd();
3549  ParamInfo.SetIdentifier(nullptr, CaretLoc);
3550  ParamInfo.SetRangeEnd(Tmp);
3551  if (ParamInfo.isInvalidType()) {
3552  // If there was an error parsing the arguments, they may have
3553  // tried to use ^(x+y) which requires an argument list. Just
3554  // skip the whole block literal.
3555  Actions.ActOnBlockError(CaretLoc, getCurScope());
3556  return ExprError();
3557  }
3558 
3559  MaybeParseGNUAttributes(ParamInfo);
3560 
3561  // Inform sema that we are starting a block.
3562  Actions.ActOnBlockArguments(CaretLoc, ParamInfo, getCurScope());
3563  } else if (!Tok.is(tok::l_brace)) {
3564  ParseBlockId(CaretLoc);
3565  } else {
3566  // Otherwise, pretend we saw (void).
3567  SourceLocation NoLoc;
3568  ParamInfo.AddTypeInfo(
3569  DeclaratorChunk::getFunction(/*HasProto=*/true,
3570  /*IsAmbiguous=*/false,
3571  /*RParenLoc=*/NoLoc,
3572  /*ArgInfo=*/nullptr,
3573  /*NumParams=*/0,
3574  /*EllipsisLoc=*/NoLoc,
3575  /*RParenLoc=*/NoLoc,
3576  /*RefQualifierIsLvalueRef=*/true,
3577  /*RefQualifierLoc=*/NoLoc,
3578  /*MutableLoc=*/NoLoc, EST_None,
3579  /*ESpecRange=*/SourceRange(),
3580  /*Exceptions=*/nullptr,
3581  /*ExceptionRanges=*/nullptr,
3582  /*NumExceptions=*/0,
3583  /*NoexceptExpr=*/nullptr,
3584  /*ExceptionSpecTokens=*/nullptr,
3585  /*DeclsInPrototype=*/None, CaretLoc,
3586  CaretLoc, ParamInfo),
3587  CaretLoc);
3588 
3589  MaybeParseGNUAttributes(ParamInfo);
3590 
3591  // Inform sema that we are starting a block.
3592  Actions.ActOnBlockArguments(CaretLoc, ParamInfo, getCurScope());
3593  }
3594 
3595 
3596  ExprResult Result(true);
3597  if (!Tok.is(tok::l_brace)) {
3598  // Saw something like: ^expr
3599  Diag(Tok, diag::err_expected_expression);
3600  Actions.ActOnBlockError(CaretLoc, getCurScope());
3601  return ExprError();
3602  }
3603 
3604  StmtResult Stmt(ParseCompoundStatementBody());
3605  BlockScope.Exit();
3606  if (!Stmt.isInvalid())
3607  Result = Actions.ActOnBlockStmtExpr(CaretLoc, Stmt.get(), getCurScope());
3608  else
3609  Actions.ActOnBlockError(CaretLoc, getCurScope());
3610  return Result;
3611 }
3612 
3613 /// ParseObjCBoolLiteral - This handles the objective-c Boolean literals.
3614 ///
3615 /// '__objc_yes'
3616 /// '__objc_no'
3617 ExprResult Parser::ParseObjCBoolLiteral() {
3618  tok::TokenKind Kind = Tok.getKind();
3619  return Actions.ActOnObjCBoolLiteral(ConsumeToken(), Kind);
3620 }
3621 
3622 /// Validate availability spec list, emitting diagnostics if necessary. Returns
3623 /// true if invalid.
3625  ArrayRef<AvailabilitySpec> AvailSpecs) {
3626  llvm::SmallSet<StringRef, 4> Platforms;
3627  bool HasOtherPlatformSpec = false;
3628  bool Valid = true;
3629  for (const auto &Spec : AvailSpecs) {
3630  if (Spec.isOtherPlatformSpec()) {
3631  if (HasOtherPlatformSpec) {
3632  P.Diag(Spec.getBeginLoc(), diag::err_availability_query_repeated_star);
3633  Valid = false;
3634  }
3635 
3636  HasOtherPlatformSpec = true;
3637  continue;
3638  }
3639 
3640  bool Inserted = Platforms.insert(Spec.getPlatform()).second;
3641  if (!Inserted) {
3642  // Rule out multiple version specs referring to the same platform.
3643  // For example, we emit an error for:
3644  // @available(macos 10.10, macos 10.11, *)
3645  StringRef Platform = Spec.getPlatform();
3646  P.Diag(Spec.getBeginLoc(), diag::err_availability_query_repeated_platform)
3647  << Spec.getEndLoc() << Platform;
3648  Valid = false;
3649  }
3650  }
3651 
3652  if (!HasOtherPlatformSpec) {
3653  SourceLocation InsertWildcardLoc = AvailSpecs.back().getEndLoc();
3654  P.Diag(InsertWildcardLoc, diag::err_availability_query_wildcard_required)
3655  << FixItHint::CreateInsertion(InsertWildcardLoc, ", *");
3656  return true;
3657  }
3658 
3659  return !Valid;
3660 }
3661 
3662 /// Parse availability query specification.
3663 ///
3664 /// availability-spec:
3665 /// '*'
3666 /// identifier version-tuple
3667 Optional<AvailabilitySpec> Parser::ParseAvailabilitySpec() {
3668  if (Tok.is(tok::star)) {
3669  return AvailabilitySpec(ConsumeToken());
3670  } else {
3671  // Parse the platform name.
3672  if (Tok.is(tok::code_completion)) {
3673  cutOffParsing();
3675  return None;
3676  }
3677  if (Tok.isNot(tok::identifier)) {
3678  Diag(Tok, diag::err_avail_query_expected_platform_name);
3679  return None;
3680  }
3681 
3682  IdentifierLoc *PlatformIdentifier = ParseIdentifierLoc();
3683  SourceRange VersionRange;
3684  VersionTuple Version = ParseVersionTuple(VersionRange);
3685 
3686  if (Version.empty())
3687  return None;
3688 
3689  StringRef GivenPlatform = PlatformIdentifier->Ident->getName();
3690  StringRef Platform =
3691  AvailabilityAttr::canonicalizePlatformName(GivenPlatform);
3692 
3693  if (AvailabilityAttr::getPrettyPlatformName(Platform).empty()) {
3694  Diag(PlatformIdentifier->Loc,
3695  diag::err_avail_query_unrecognized_platform_name)
3696  << GivenPlatform;
3697  return None;
3698  }
3699 
3700  return AvailabilitySpec(Version, Platform, PlatformIdentifier->Loc,
3701  VersionRange.getEnd());
3702  }
3703 }
3704 
3705 ExprResult Parser::ParseAvailabilityCheckExpr(SourceLocation BeginLoc) {
3706  assert(Tok.is(tok::kw___builtin_available) ||
3707  Tok.isObjCAtKeyword(tok::objc_available));
3708 
3709  // Eat the available or __builtin_available.
3710  ConsumeToken();
3711 
3712  BalancedDelimiterTracker Parens(*this, tok::l_paren);
3713  if (Parens.expectAndConsume())
3714  return ExprError();
3715 
3717  bool HasError = false;
3718  while (true) {
3719  Optional<AvailabilitySpec> Spec = ParseAvailabilitySpec();
3720  if (!Spec)
3721  HasError = true;
3722  else
3723  AvailSpecs.push_back(*Spec);
3724 
3725  if (!TryConsumeToken(tok::comma))
3726  break;
3727  }
3728 
3729  if (HasError) {
3730  SkipUntil(tok::r_paren, StopAtSemi);
3731  return ExprError();
3732  }
3733 
3734  CheckAvailabilitySpecList(*this, AvailSpecs);
3735 
3736  if (Parens.consumeClose())
3737  return ExprError();
3738 
3739  return Actions.ActOnObjCAvailabilityCheckExpr(AvailSpecs, BeginLoc,
3740  Parens.getCloseLocation());
3741 }
clang::OpenCL
@ OpenCL
Definition: LangStandard.h:62
clang::UnqualifiedId
Represents a C++ unqualified-id that has been parsed.
Definition: DeclSpec.h:950
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:1743
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:5251
clang::IdentifierLoc::Ident
IdentifierInfo * Ident
Definition: ParsedAttr.h:214
clang::PreferredTypeBuilder::enterBinary
void enterBinary(Sema &S, SourceLocation Tok, Expr *LHS, tok::TokenKind Op)
Definition: SemaCodeComplete.cpp:555
clang::Sema::ActOnNoexceptExpr
ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, Expr *Operand, SourceLocation RParen)
Definition: SemaExprCXX.cpp:8031
clang::prec::LogicalAnd
@ LogicalAnd
Definition: OperatorPrecedence.h:32
clang::TemplateIdAnnotation
Information about a template-id annotation token.
Definition: ParsedTemplate.h:149
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:4687
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:8067
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:16535
clang::DeclContext
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1356
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:97
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:1217
clang::Sema::getASTContext
ASTContext & getASTContext() const
Definition: Sema.h:1614
clang::SourceLocExpr::Column
@ Column
Definition: Expr.h:4687
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:2482
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:15186
clang::Sema::ActOnStartCXXMemberReference
ExprResult ActOnStartCXXMemberReference(Scope *S, Expr *Base, SourceLocation OpLoc, tok::TokenKind OpKind, ParsedType &ObjectType, bool &MayBePseudoDestructor)
Definition: SemaExprCXX.cpp:7443
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:247
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:675
clang::Sema::ActOnAsTypeExpr
ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, SourceLocation BuiltinLoc, SourceLocation RParenLoc)
__builtin_astype(...)
Definition: SemaExpr.cpp:6868
clang::EST_None
@ EST_None
no exception specification
Definition: ExceptionSpecificationType.h:21
AttributeLangSupport::C
@ C
Definition: SemaDeclAttr.cpp:55
clang::Token::getIdentifierInfo
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:178
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::SourceLocExpr::SourceLocStruct
@ SourceLocStruct
Definition: Expr.h:4687
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:1712
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:286
clang::SourceLocExpr::File
@ File
Definition: Expr.h:4687
clang::Token::isAtStartOfLine
bool isAtStartOfLine() const
isAtStartOfLine - Return true if this token is at the start of a line.
Definition: Token.h:267
clang::C99
@ C99
Definition: LangStandard.h:49
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:7892
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:1605
clang::Sema::ActOnCXXNullPtrLiteral
ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc)
ActOnCXXNullPtrLiteral - Parse 'nullptr'.
Definition: SemaExprCXX.cpp:817
clang::Sema::ActOnPostfixUnaryOp
ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, tok::TokenKind Kind, Expr *Input)
Definition: SemaExpr.cpp:4735
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:126
clang::Sema::ActOnStmtExpr
ExprResult ActOnStmtExpr(Scope *S, SourceLocation LPLoc, Stmt *SubStmt, SourceLocation RPLoc)
Definition: SemaExpr.cpp:15736
clang::Sema::ExprEvalContexts
SmallVector< ExpressionEvaluationContextRecord, 8 > ExprEvalContexts
A stack of expression evaluation contexts.
Definition: Sema.h:1360
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:5690
clang::Preprocessor::isCodeCompletionReached
bool isCodeCompletionReached() const
Returns true if code-completion is enabled and we have hit the code-completion point.
Definition: Preprocessor.h:1731
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:16179
clang::IdentifierLoc::Loc
SourceLocation Loc
Definition: ParsedAttr.h:213
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:627
clang::Type
The base class of the type hierarchy.
Definition: Type.h:1500
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:1854
clang::Parser::ParseConstraintExpression
ExprResult ParseConstraintExpression()
Parse a constraint-expression.
Definition: ParseExpr.cpp:235
clang::CPlusPlus17
@ CPlusPlus17
Definition: LangStandard.h:56
clang::Sema::ActOnBlockArguments
void ActOnBlockArguments(SourceLocation CaretLoc, Declarator &ParamInfo, Scope *CurScope)
ActOnBlockArguments - This callback allows processing of block arguments.
Definition: SemaExpr.cpp:16061
clang::ExprEmpty
ExprResult ExprEmpty()
Definition: Ownership.h:289
clang::Sema::ActOnArraySubscriptExpr
ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, MultiExprArg ArgExprs, SourceLocation RLoc)
Definition: SemaExpr.cpp:4810
clang::prec::Unknown
@ Unknown
Definition: OperatorPrecedence.h:27
clang::Parser::NotTypeCast
@ NotTypeCast
Definition: Parser.h:1744
clang::Sema::ActOnObjCAvailabilityCheckExpr
ExprResult ActOnObjCAvailabilityCheckExpr(llvm::ArrayRef< AvailabilitySpec > AvailSpecs, SourceLocation AtLoc, SourceLocation RParen)
Definition: SemaExpr.cpp:20628
clang::CompoundStmt
CompoundStmt - This represents a group of statements like { stmt stmt }.
Definition: Stmt.h:1401
clang::Sema::ActOnClassPropertyRefExpr
ExprResult ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, IdentifierInfo &propertyName, SourceLocation receiverNameLoc, SourceLocation propertyNameLoc)
Definition: SemaExprObjC.cpp:2159
clang::SourceLocExpr::Line
@ Line
Definition: Expr.h:4687
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:6449
clang::Sema::ActOnChooseExpr
ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr, SourceLocation RPLoc)
Definition: SemaExpr.cpp:15993
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:15974
clang::C11
@ C11
Definition: LangStandard.h:50
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:2789
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:1184
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:1939
clang::CPlusPlus
@ CPlusPlus
Definition: LangStandard.h:53
clang::Parser::StopBeforeMatch
@ StopBeforeMatch
Stop skipping at specified token, but don't skip the token itself.
Definition: Parser.h:1198
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:4713
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:6850
clang::Parser::getLangOpts
const LangOptions & getLangOpts() const
Definition: Parser.h:440
clang::DeclaratorContext::BlockLiteral
@ BlockLiteral
clang::LabelDecl
Represents the declaration of a label.
Definition: Decl.h:494
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:16032
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:6744
clang::Sema::CodeCompleteOrdinaryName
void CodeCompleteOrdinaryName(Scope *S, ParserCompletionContext CompletionContext)
Definition: SemaCodeComplete.cpp:4286
clang::TemplateIdAnnotation::Kind
TemplateNameKind Kind
The kind of template that Template refers to.
Definition: ParsedTemplate.h:174
clang::Sema::ActOnVAArg
ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, SourceLocation RPLoc)
Definition: SemaExpr.cpp:16376
clang::Token::getAnnotationEndLoc
SourceLocation getAnnotationEndLoc() const
Definition: Token.h:139
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:5554
clang::Sema::TentativeAnalysisScope
RAII class used to indicate that we are performing provisional semantic analysis to determine the val...
Definition: Sema.h:9343
ExprCXX.h
Base
clang::Parser::getCurScope
Scope * getCurScope() const
Definition: Parser.h:447
clang::DeclContext::isRecord
bool isRecord() const
Definition: DeclBase.h:1955
clang::SourceLocExpr::Function
@ Function
Definition: Expr.h:4687
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:1745
getKind
static Decl::Kind getKind(const Decl *D)
Definition: DeclBase.cpp:1008
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:4681
clang::AvailabilitySpec
One specifier in an @available expression.
Definition: Availability.h:30
clang::Parser::StopAtSemi
@ StopAtSemi
Stop skipping at semicolon.
Definition: Parser.h:1196
clang::Sema::ActOnSYCLUniqueStableNameExpr
ExprResult ActOnSYCLUniqueStableNameExpr(SourceLocation OpLoc, SourceLocation LParen, SourceLocation RParen, ParsedType ParsedTy)
Definition: SemaExpr.cpp:3582
PrettyStackTrace.h
clang::Sema::ActOnSourceLocExpr
ExprResult ActOnSourceLocExpr(SourceLocExpr::IdentKind Kind, SourceLocation BuiltinLoc, SourceLocation RPLoc)
Definition: SemaExpr.cpp:16620
clang::Sema::ActOnObjCBoolLiteral
ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind)
ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals.
Definition: SemaExpr.cpp:20609
clang::OpaquePtr< QualType >
clang::Preprocessor::getSourceManager
SourceManager & getSourceManager() const
Definition: Preprocessor.h:998
clang::CPlusPlus2b
@ CPlusPlus2b
Definition: LangStandard.h:58
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:1821
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:490
clang::Sema::ActOnCoawaitExpr
ExprResult ActOnCoawaitExpr(Scope *S, SourceLocation KwLoc, Expr *E)
Definition: SemaCoroutine.cpp:784
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:3614
clang::DeclContext::getParent
DeclContext * getParent()
getParent - Returns the containing DeclContext.
Definition: DeclBase.h:1876
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:247
clang::ASTContext::getPrintingPolicy
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:708
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:7026
clang::QualType::isNull
bool isNull() const
Return true if this QualType doesn't point to a type yet.
Definition: Type.h:740
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
clang::Sema::ProduceCallSignatureHelp
QualType ProduceCallSignatureHelp(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:5994
Scope.h
clang::EnterExpressionEvaluationContext
RAII object that enters a new expression evaluation context.
Definition: Sema.h:13337
clang::Sema::ActOnStartStmtExpr
void ActOnStartStmtExpr()
Definition: SemaExpr.cpp:15724
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:9077
clang::Token::getName
const char * getName() const
Definition: Token.h:167
clang::Parser::TryConsumeToken
bool TryConsumeToken(tok::TokenKind Expected)
Definition: Parser.h:498
clang::DeclContext::isFileContext
bool isFileContext() const
Definition: DeclBase.h:1946
clang::Sema::ContextRAII
A RAII object to temporarily push a declaration context.
Definition: Sema.h:985
clang::Sema::ActOnNumericConstant
ExprResult ActOnNumericConstant(const Token &Tok, Scope *UDLScope=nullptr)
Definition: SemaExpr.cpp:3740
clang::BalancedDelimiterTracker::getOpenLocation
SourceLocation getOpenLocation() const
Definition: RAIIObjectsForParser.h:427
clang::Sema::CodeCompletePostfixExpression
void CodeCompletePostfixExpression(Scope *S, ExprResult LHS, QualType PreferredType)
Definition: SemaCodeComplete.cpp:4790
clang::Sema::getExprRange
SourceRange getExprRange(Expr *E) const
Definition: SemaExpr.cpp:493
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:125
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:5133
clang::Sema::ActOnConstantExpression
ExprResult ActOnConstantExpression(ExprResult Res)
Definition: SemaExpr.cpp:19219
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:9996
clang::Sema::ActOnConvertVectorExpr
ExprResult ActOnConvertVectorExpr(Expr *E, ParsedType ParsedDestTy, SourceLocation BuiltinLoc, SourceLocation RParenLoc)
__builtin_convertvector(...)
Definition: SemaExpr.cpp:6895
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:15710
clang::BalancedDelimiterTracker::skipToEnd
void skipToEnd()
Definition: Parser.cpp:2659
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:20661
clang::Parser::getActions
Sema & getActions() const
Definition: Parser.h:443
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:4130
clang::Parser::TryAnnotateTypeOrScopeToken
bool TryAnnotateTypeOrScopeToken()
TryAnnotateTypeOrScopeToken - If the current token position is on a typename (possibly qualified in C...
Definition: Parser.cpp:1880
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:1803
clang::SourceManager::isInSystemHeader
bool isInSystemHeader(SourceLocation Loc) const
Returns if a SourceLocation is in a system header.
Definition: SourceManager.h:1493
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:123
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:1930
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:4156
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:3624
clang::Sema::ActOnAddrLabel
ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, LabelDecl *TheDecl)
ActOnAddrLabel - Parse the GNU address of label extension: "&&foo".
Definition: SemaExpr.cpp:15716
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:148
clang::Parser::getTypeAnnotation
static TypeResult getTypeAnnotation(const Token &Tok)
getTypeAnnotation - Read a parsed type out of an annotation token.
Definition: Parser.h:810
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:1002
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:5269
clang::CPlusPlus11
@ CPlusPlus11
Definition: LangStandard.h:54
llvm::SmallVectorImpl
Definition: Randstruct.h:18
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:449
clang::Sema::ActOnPredefinedExpr
ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind)
Definition: SemaExpr.cpp:3597
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:5083
clang::IdentifierLoc
Wraps an identifier and optional source location for the identifier.
Definition: ParsedAttr.h:212
clang::CastExpr
CastExpr - Base class for type casts, including both implicit casts (ImplicitCastExpr) and explicit c...
Definition: Expr.h:3475
clang::Parser::NextToken
const Token & NextToken()
NextToken - This peeks ahead one token and returns it without consuming it.
Definition: Parser.h:805
clang::Sema::ActOnCompoundLiteral
ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, ParsedType Ty, SourceLocation RParenLoc, Expr *InitExpr)
Definition: SemaExpr.cpp:7202
clang::Sema::PCC_Type
@ PCC_Type
Code completion occurs where only a type is permitted.
Definition: Sema.h:12674
clang::Parser::IsTypeCast
@ IsTypeCast
Definition: Parser.h:1746
clang::Sema::ActOnNameClassifiedAsOverloadSet
ExprResult ActOnNameClassifiedAsOverloadSet(Scope *S, Expr *OverloadSet)
Act on the result of classifying a name as an overload set.
Definition: SemaDecl.cpp:1272
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:62
clang::Sema::CodeCompleteObjCClassPropertyRefExpr
void CodeCompleteObjCClassPropertyRefExpr(Scope *S, IdentifierInfo &ClassName, SourceLocation ClassNameLoc, bool IsBaseExprStatement)
Definition: SemaCodeComplete.cpp:5711
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:6601
clang::Sema::ActOnStmtExprError
void ActOnStmtExprError()
Definition: SemaExpr.cpp:15728
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:134
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:16191
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:1610
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:8680
Parser.h