Coverage Report

Created: 2021-01-23 06:44

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/Parse/ParseExpr.cpp
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Source (jump to first uncovered line)
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//===--- ParseExpr.cpp - Expression Parsing -------------------------------===//
2
//
3
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4
// See https://llvm.org/LICENSE.txt for license information.
5
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6
//
7
//===----------------------------------------------------------------------===//
8
///
9
/// \file
10
/// Provides the Expression parsing implementation.
11
///
12
/// Expressions in C99 basically consist of a bunch of binary operators with
13
/// unary operators and other random stuff at the leaves.
14
///
15
/// In the C99 grammar, these unary operators bind tightest and are represented
16
/// as the 'cast-expression' production.  Everything else is either a binary
17
/// operator (e.g. '/') or a ternary operator ("?:").  The unary leaves are
18
/// handled by ParseCastExpression, the higher level pieces are handled by
19
/// ParseBinaryExpression.
20
///
21
//===----------------------------------------------------------------------===//
22
23
#include "clang/Parse/Parser.h"
24
#include "clang/AST/ASTContext.h"
25
#include "clang/AST/ExprCXX.h"
26
#include "clang/Basic/PrettyStackTrace.h"
27
#include "clang/Parse/RAIIObjectsForParser.h"
28
#include "clang/Sema/DeclSpec.h"
29
#include "clang/Sema/ParsedTemplate.h"
30
#include "clang/Sema/Scope.h"
31
#include "clang/Sema/TypoCorrection.h"
32
#include "llvm/ADT/SmallVector.h"
33
using namespace clang;
34
35
/// Simple precedence-based parser for binary/ternary operators.
36
///
37
/// Note: we diverge from the C99 grammar when parsing the assignment-expression
38
/// production.  C99 specifies that the LHS of an assignment operator should be
39
/// parsed as a unary-expression, but consistency dictates that it be a
40
/// conditional-expession.  In practice, the important thing here is that the
41
/// LHS of an assignment has to be an l-value, which productions between
42
/// unary-expression and conditional-expression don't produce.  Because we want
43
/// consistency, we parse the LHS as a conditional-expression, then check for
44
/// l-value-ness in semantic analysis stages.
45
///
46
/// \verbatim
47
///       pm-expression: [C++ 5.5]
48
///         cast-expression
49
///         pm-expression '.*' cast-expression
50
///         pm-expression '->*' cast-expression
51
///
52
///       multiplicative-expression: [C99 6.5.5]
53
///     Note: in C++, apply pm-expression instead of cast-expression
54
///         cast-expression
55
///         multiplicative-expression '*' cast-expression
56
///         multiplicative-expression '/' cast-expression
57
///         multiplicative-expression '%' cast-expression
58
///
59
///       additive-expression: [C99 6.5.6]
60
///         multiplicative-expression
61
///         additive-expression '+' multiplicative-expression
62
///         additive-expression '-' multiplicative-expression
63
///
64
///       shift-expression: [C99 6.5.7]
65
///         additive-expression
66
///         shift-expression '<<' additive-expression
67
///         shift-expression '>>' additive-expression
68
///
69
///       compare-expression: [C++20 expr.spaceship]
70
///         shift-expression
71
///         compare-expression '<=>' shift-expression
72
///
73
///       relational-expression: [C99 6.5.8]
74
///         compare-expression
75
///         relational-expression '<' compare-expression
76
///         relational-expression '>' compare-expression
77
///         relational-expression '<=' compare-expression
78
///         relational-expression '>=' compare-expression
79
///
80
///       equality-expression: [C99 6.5.9]
81
///         relational-expression
82
///         equality-expression '==' relational-expression
83
///         equality-expression '!=' relational-expression
84
///
85
///       AND-expression: [C99 6.5.10]
86
///         equality-expression
87
///         AND-expression '&' equality-expression
88
///
89
///       exclusive-OR-expression: [C99 6.5.11]
90
///         AND-expression
91
///         exclusive-OR-expression '^' AND-expression
92
///
93
///       inclusive-OR-expression: [C99 6.5.12]
94
///         exclusive-OR-expression
95
///         inclusive-OR-expression '|' exclusive-OR-expression
96
///
97
///       logical-AND-expression: [C99 6.5.13]
98
///         inclusive-OR-expression
99
///         logical-AND-expression '&&' inclusive-OR-expression
100
///
101
///       logical-OR-expression: [C99 6.5.14]
102
///         logical-AND-expression
103
///         logical-OR-expression '||' logical-AND-expression
104
///
105
///       conditional-expression: [C99 6.5.15]
106
///         logical-OR-expression
107
///         logical-OR-expression '?' expression ':' conditional-expression
108
/// [GNU]   logical-OR-expression '?' ':' conditional-expression
109
/// [C++] the third operand is an assignment-expression
110
///
111
///       assignment-expression: [C99 6.5.16]
112
///         conditional-expression
113
///         unary-expression assignment-operator assignment-expression
114
/// [C++]   throw-expression [C++ 15]
115
///
116
///       assignment-operator: one of
117
///         = *= /= %= += -= <<= >>= &= ^= |=
118
///
119
///       expression: [C99 6.5.17]
120
///         assignment-expression ...[opt]
121
///         expression ',' assignment-expression ...[opt]
122
/// \endverbatim
123
6.81M
ExprResult Parser::ParseExpression(TypeCastState isTypeCast) {
124
6.81M
  ExprResult LHS(ParseAssignmentExpression(isTypeCast));
125
6.81M
  return ParseRHSOfBinaryExpression(LHS, prec::Comma);
126
6.81M
}
127
128
/// This routine is called when the '@' is seen and consumed.
129
/// Current token is an Identifier and is not a 'try'. This
130
/// routine is necessary to disambiguate \@try-statement from,
131
/// for example, \@encode-expression.
132
///
133
ExprResult
134
298
Parser::ParseExpressionWithLeadingAt(SourceLocation AtLoc) {
135
298
  ExprResult LHS(ParseObjCAtExpression(AtLoc));
136
298
  return ParseRHSOfBinaryExpression(LHS, prec::Comma);
137
298
}
138
139
/// This routine is called when a leading '__extension__' is seen and
140
/// consumed.  This is necessary because the token gets consumed in the
141
/// process of disambiguating between an expression and a declaration.
142
ExprResult
143
3.58k
Parser::ParseExpressionWithLeadingExtension(SourceLocation ExtLoc) {
144
3.58k
  ExprResult LHS(true);
145
3.58k
  {
146
    // Silence extension warnings in the sub-expression
147
3.58k
    ExtensionRAIIObject O(Diags);
148
149
3.58k
    LHS = ParseCastExpression(AnyCastExpr);
150
3.58k
  }
151
152
3.58k
  if (!LHS.isInvalid())
153
3.58k
    LHS = Actions.ActOnUnaryOp(getCurScope(), ExtLoc, tok::kw___extension__,
154
3.58k
                               LHS.get());
155
156
3.58k
  return ParseRHSOfBinaryExpression(LHS, prec::Comma);
157
3.58k
}
158
159
/// Parse an expr that doesn't include (top-level) commas.
160
22.4M
ExprResult Parser::ParseAssignmentExpression(TypeCastState isTypeCast) {
161
22.4M
  if (Tok.is(tok::code_completion)) {
162
201
    Actions.CodeCompleteExpression(getCurScope(),
163
201
                                   PreferredType.get(Tok.getLocation()));
164
201
    cutOffParsing();
165
201
    return ExprError();
166
201
  }
167
168
22.4M
  if (Tok.is(tok::kw_throw))
169
13.5k
    return ParseThrowExpression();
170
22.4M
  if (Tok.is(tok::kw_co_yield))
171
63
    return ParseCoyieldExpression();
172
173
22.4M
  ExprResult LHS = ParseCastExpression(AnyCastExpr,
174
22.4M
                                       /*isAddressOfOperand=*/false,
175
22.4M
                                       isTypeCast);
176
22.4M
  return ParseRHSOfBinaryExpression(LHS, prec::Assignment);
177
22.4M
}
178
179
/// Parse an assignment expression where part of an Objective-C message
180
/// send has already been parsed.
181
///
182
/// In this case \p LBracLoc indicates the location of the '[' of the message
183
/// send, and either \p ReceiverName or \p ReceiverExpr is non-null indicating
184
/// the receiver of the message.
185
///
186
/// Since this handles full assignment-expression's, it handles postfix
187
/// expressions and other binary operators for these expressions as well.
188
ExprResult
189
Parser::ParseAssignmentExprWithObjCMessageExprStart(SourceLocation LBracLoc,
190
                                                    SourceLocation SuperLoc,
191
                                                    ParsedType ReceiverType,
192
68
                                                    Expr *ReceiverExpr) {
193
68
  ExprResult R
194
68
    = ParseObjCMessageExpressionBody(LBracLoc, SuperLoc,
195
68
                                     ReceiverType, ReceiverExpr);
196
68
  R = ParsePostfixExpressionSuffix(R);
197
68
  return ParseRHSOfBinaryExpression(R, prec::Assignment);
198
68
}
199
200
ExprResult
201
5.58M
Parser::ParseConstantExpressionInExprEvalContext(TypeCastState isTypeCast) {
202
5.58M
  assert(Actions.ExprEvalContexts.back().Context ==
203
5.58M
             Sema::ExpressionEvaluationContext::ConstantEvaluated &&
204
5.58M
         "Call this function only if your ExpressionEvaluationContext is "
205
5.58M
         "already ConstantEvaluated");
206
5.58M
  ExprResult LHS(ParseCastExpression(AnyCastExpr, false, isTypeCast));
207
5.58M
  ExprResult Res(ParseRHSOfBinaryExpression(LHS, prec::Conditional));
208
5.58M
  return Actions.ActOnConstantExpression(Res);
209
5.58M
}
210
211
157k
ExprResult Parser::ParseConstantExpression(TypeCastState isTypeCast) {
212
  // C++03 [basic.def.odr]p2:
213
  //   An expression is potentially evaluated unless it appears where an
214
  //   integral constant expression is required (see 5.19) [...].
215
  // C++98 and C++11 have no such rule, but this is only a defect in C++98.
216
157k
  EnterExpressionEvaluationContext ConstantEvaluated(
217
157k
      Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated);
218
157k
  return ParseConstantExpressionInExprEvalContext(isTypeCast);
219
157k
}
220
221
21.7k
ExprResult Parser::ParseCaseExpression(SourceLocation CaseLoc) {
222
21.7k
  EnterExpressionEvaluationContext ConstantEvaluated(
223
21.7k
      Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated);
224
21.7k
  ExprResult LHS(ParseCastExpression(AnyCastExpr, false, NotTypeCast));
225
21.7k
  ExprResult Res(ParseRHSOfBinaryExpression(LHS, prec::Conditional));
226
21.7k
  return Actions.ActOnCaseExpr(CaseLoc, Res);
227
21.7k
}
228
229
/// Parse a constraint-expression.
230
///
231
/// \verbatim
232
///       constraint-expression: C++2a[temp.constr.decl]p1
233
///         logical-or-expression
234
/// \endverbatim
235
277
ExprResult Parser::ParseConstraintExpression() {
236
277
  EnterExpressionEvaluationContext ConstantEvaluated(
237
277
      Actions, Sema::ExpressionEvaluationContext::Unevaluated);
238
277
  ExprResult LHS(ParseCastExpression(AnyCastExpr));
239
277
  ExprResult Res(ParseRHSOfBinaryExpression(LHS, prec::LogicalOr));
240
277
  if (Res.isUsable() && 
!Actions.CheckConstraintExpression(Res.get())274
) {
241
6
    Actions.CorrectDelayedTyposInExpr(Res);
242
6
    return ExprError();
243
6
  }
244
271
  return Res;
245
271
}
246
247
/// \brief Parse a constraint-logical-and-expression.
248
///
249
/// \verbatim
250
///       C++2a[temp.constr.decl]p1
251
///       constraint-logical-and-expression:
252
///         primary-expression
253
///         constraint-logical-and-expression '&&' primary-expression
254
///
255
/// \endverbatim
256
ExprResult
257
409
Parser::ParseConstraintLogicalAndExpression(bool IsTrailingRequiresClause) {
258
409
  EnterExpressionEvaluationContext ConstantEvaluated(
259
409
      Actions, Sema::ExpressionEvaluationContext::Unevaluated);
260
409
  bool NotPrimaryExpression = false;
261
439
  auto ParsePrimary = [&] () {
262
439
    ExprResult E = ParseCastExpression(PrimaryExprOnly,
263
439
                                       /*isAddressOfOperand=*/false,
264
439
                                       /*isTypeCast=*/NotTypeCast,
265
439
                                       /*isVectorLiteral=*/false,
266
439
                                       &NotPrimaryExpression);
267
439
    if (E.isInvalid())
268
5
      return ExprError();
269
434
    auto RecoverFromNonPrimary = [&] (ExprResult E, bool Note) {
270
11
        E = ParsePostfixExpressionSuffix(E);
271
        // Use InclusiveOr, the precedence just after '&&' to not parse the
272
        // next arguments to the logical and.
273
11
        E = ParseRHSOfBinaryExpression(E, prec::InclusiveOr);
274
11
        if (!E.isInvalid())
275
10
          Diag(E.get()->getExprLoc(),
276
10
               Note
277
2
               ? diag::note_unparenthesized_non_primary_expr_in_requires_clause
278
8
               : diag::err_unparenthesized_non_primary_expr_in_requires_clause)
279
10
               << FixItHint::CreateInsertion(E.get()->getBeginLoc(), "(")
280
10
               << FixItHint::CreateInsertion(
281
10
                   PP.getLocForEndOfToken(E.get()->getEndLoc()), ")")
282
10
               << E.get()->getSourceRange();
283
11
        return E;
284
11
    };
285
286
434
    if (NotPrimaryExpression ||
287
        // Check if the following tokens must be a part of a non-primary
288
        // expression
289
430
        getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator,
290
430
                           /*CPlusPlus11=*/true) > prec::LogicalAnd ||
291
        // Postfix operators other than '(' (which will be checked for in
292
        // CheckConstraintExpression).
293
428
        Tok.isOneOf(tok::period, tok::plusplus, tok::minusminus) ||
294
428
        (Tok.is(tok::l_square) && 
!NextToken().is(tok::l_square)0
)) {
295
6
      E = RecoverFromNonPrimary(E, /*Note=*/false);
296
6
      if (E.isInvalid())
297
0
        return ExprError();
298
6
      NotPrimaryExpression = false;
299
6
    }
300
434
    bool PossibleNonPrimary;
301
434
    bool IsConstraintExpr =
302
434
        Actions.CheckConstraintExpression(E.get(), Tok, &PossibleNonPrimary,
303
434
                                          IsTrailingRequiresClause);
304
434
    if (!IsConstraintExpr || 
PossibleNonPrimary431
) {
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
6
      if (PossibleNonPrimary)
310
5
        E = RecoverFromNonPrimary(E, /*Note=*/!IsConstraintExpr);
311
6
      Actions.CorrectDelayedTyposInExpr(E);
312
6
      return ExprError();
313
6
    }
314
428
    return E;
315
428
  };
316
409
  ExprResult LHS = ParsePrimary();
317
409
  if (LHS.isInvalid())
318
11
    return ExprError();
319
428
  
while (398
Tok.is(tok::ampamp)) {
320
30
    SourceLocation LogicalAndLoc = ConsumeToken();
321
30
    ExprResult RHS = ParsePrimary();
322
30
    if (RHS.isInvalid()) {
323
0
      Actions.CorrectDelayedTyposInExpr(LHS);
324
0
      return ExprError();
325
0
    }
326
30
    ExprResult Op = Actions.ActOnBinOp(getCurScope(), LogicalAndLoc,
327
30
                                       tok::ampamp, LHS.get(), RHS.get());
328
30
    if (!Op.isUsable()) {
329
0
      Actions.CorrectDelayedTyposInExpr(RHS);
330
0
      Actions.CorrectDelayedTyposInExpr(LHS);
331
0
      return ExprError();
332
0
    }
333
30
    LHS = Op;
334
30
  }
335
398
  return LHS;
336
398
}
337
338
/// \brief Parse a constraint-logical-or-expression.
339
///
340
/// \verbatim
341
///       C++2a[temp.constr.decl]p1
342
///       constraint-logical-or-expression:
343
///         constraint-logical-and-expression
344
///         constraint-logical-or-expression '||'
345
///             constraint-logical-and-expression
346
///
347
/// \endverbatim
348
ExprResult
349
401
Parser::ParseConstraintLogicalOrExpression(bool IsTrailingRequiresClause) {
350
401
  ExprResult LHS(ParseConstraintLogicalAndExpression(IsTrailingRequiresClause));
351
401
  if (!LHS.isUsable())
352
11
    return ExprError();
353
398
  
while (390
Tok.is(tok::pipepipe)) {
354
8
    SourceLocation LogicalOrLoc = ConsumeToken();
355
8
    ExprResult RHS =
356
8
        ParseConstraintLogicalAndExpression(IsTrailingRequiresClause);
357
8
    if (!RHS.isUsable()) {
358
0
      Actions.CorrectDelayedTyposInExpr(LHS);
359
0
      return ExprError();
360
0
    }
361
8
    ExprResult Op = Actions.ActOnBinOp(getCurScope(), LogicalOrLoc,
362
8
                                       tok::pipepipe, LHS.get(), RHS.get());
363
8
    if (!Op.isUsable()) {
364
0
      Actions.CorrectDelayedTyposInExpr(RHS);
365
0
      Actions.CorrectDelayedTyposInExpr(LHS);
366
0
      return ExprError();
367
0
    }
368
8
    LHS = Op;
369
8
  }
370
390
  return LHS;
371
390
}
372
373
38.9k
bool Parser::isNotExpressionStart() {
374
38.9k
  tok::TokenKind K = Tok.getKind();
375
38.9k
  if (K == tok::l_brace || 
K == tok::r_brace38.9k
||
376
38.9k
      K == tok::kw_for  || K == tok::kw_while ||
377
38.9k
      K == tok::kw_if   || 
K == tok::kw_else38.9k
||
378
38.9k
      K == tok::kw_goto || K == tok::kw_try)
379
5
    return true;
380
  // If this is a decl-specifier, we can't be at the start of an expression.
381
38.9k
  return isKnownToBeDeclarationSpecifier();
382
38.9k
}
383
384
4.58M
bool Parser::isFoldOperator(prec::Level Level) const {
385
4.58M
  return Level > prec::Unknown && 
Level != prec::Conditional3.53M
&&
386
3.48M
         Level != prec::Spaceship;
387
4.58M
}
388
389
1.05M
bool Parser::isFoldOperator(tok::TokenKind Kind) const {
390
1.05M
  return isFoldOperator(getBinOpPrecedence(Kind, GreaterThanIsOperator, true));
391
1.05M
}
392
393
/// Parse a binary expression that starts with \p LHS and has a
394
/// precedence of at least \p MinPrec.
395
ExprResult
396
34.9M
Parser::ParseRHSOfBinaryExpression(ExprResult LHS, prec::Level MinPrec) {
397
34.9M
  prec::Level NextTokPrec = getBinOpPrecedence(Tok.getKind(),
398
34.9M
                                               GreaterThanIsOperator,
399
34.9M
                                               getLangOpts().CPlusPlus11);
400
34.9M
  SourceLocation ColonLoc;
401
402
34.9M
  auto SavedType = PreferredType;
403
38.5M
  while (1) {
404
    // Every iteration may rely on a preferred type for the whole expression.
405
38.5M
    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
38.5M
    if (NextTokPrec < MinPrec)
410
34.9M
      return LHS;
411
412
    // Consume the operator, saving the operator token for error reporting.
413
3.53M
    Token OpToken = Tok;
414
3.53M
    ConsumeToken();
415
416
3.53M
    if (OpToken.is(tok::caretcaret)) {
417
1
      return ExprError(Diag(Tok, diag::err_opencl_logical_exclusive_or));
418
1
    }
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
3.53M
    if (OpToken.isOneOf(tok::comma, tok::greater, tok::greatergreater,
423
3.53M
                        tok::greatergreatergreater) &&
424
161k
        checkPotentialAngleBracketDelimiter(OpToken))
425
18
      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
3.53M
    if (OpToken.is(tok::comma) && 
isNotExpressionStart()38.9k
) {
433
8
      PP.EnterToken(Tok, /*IsReinject*/true);
434
8
      Tok = OpToken;
435
8
      return LHS;
436
8
    }
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
3.53M
    if (isFoldOperator(NextTokPrec) && 
Tok.is(tok::ellipsis)3.48M
) {
441
      // FIXME: We can't check this via lookahead before we consume the token
442
      // because that tickles a lexer bug.
443
337
      PP.EnterToken(Tok, /*IsReinject*/true);
444
337
      Tok = OpToken;
445
337
      return LHS;
446
337
    }
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
3.53M
    if (getLangOpts().ObjC && 
getLangOpts().CPlusPlus760k
&&
454
182k
        Tok.isOneOf(tok::colon, tok::r_square) &&
455
31
        OpToken.getIdentifierInfo() != nullptr) {
456
16
      PP.EnterToken(Tok, /*IsReinject*/true);
457
16
      Tok = OpToken;
458
16
      return LHS;
459
16
    }
460
461
    // Special case handling for the ternary operator.
462
3.53M
    ExprResult TernaryMiddle(true);
463
3.53M
    if (NextTokPrec == prec::Conditional) {
464
56.3k
      if (getLangOpts().CPlusPlus11 && 
Tok.is(tok::l_brace)46.0k
) {
465
        // Parse a braced-init-list here for error recovery purposes.
466
1
        SourceLocation BraceLoc = Tok.getLocation();
467
1
        TernaryMiddle = ParseBraceInitializer();
468
1
        if (!TernaryMiddle.isInvalid()) {
469
1
          Diag(BraceLoc, diag::err_init_list_bin_op)
470
1
              << /*RHS*/ 1 << PP.getSpelling(OpToken)
471
1
              << Actions.getExprRange(TernaryMiddle.get());
472
1
          TernaryMiddle = ExprError();
473
1
        }
474
56.3k
      } else if (Tok.isNot(tok::colon)) {
475
        // Don't parse FOO:BAR as if it were a typo for FOO::BAR.
476
56.0k
        ColonProtectionRAIIObject X(*this);
477
478
        // Handle this production specially:
479
        //   logical-OR-expression '?' expression ':' conditional-expression
480
        // In particular, the RHS of the '?' is 'expression', not
481
        // 'logical-OR-expression' as we might expect.
482
56.0k
        TernaryMiddle = ParseExpression();
483
246
      } else {
484
        // Special case handling of "X ? Y : Z" where Y is empty:
485
        //   logical-OR-expression '?' ':' conditional-expression   [GNU]
486
246
        TernaryMiddle = nullptr;
487
246
        Diag(Tok, diag::ext_gnu_conditional_expr);
488
246
      }
489
490
56.3k
      if (TernaryMiddle.isInvalid()) {
491
26
        Actions.CorrectDelayedTyposInExpr(LHS);
492
26
        LHS = ExprError();
493
26
        TernaryMiddle = nullptr;
494
26
      }
495
496
56.3k
      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
9
        SourceLocation FILoc = Tok.getLocation();
502
9
        const char *FIText = ": ";
503
9
        const SourceManager &SM = PP.getSourceManager();
504
9
        if (FILoc.isFileID() || 
PP.isAtStartOfMacroExpansion(FILoc, &FILoc)2
) {
505
9
          assert(FILoc.isFileID());
506
9
          bool IsInvalid = false;
507
9
          const char *SourcePtr =
508
9
            SM.getCharacterData(FILoc.getLocWithOffset(-1), &IsInvalid);
509
9
          if (!IsInvalid && *SourcePtr == ' ') {
510
9
            SourcePtr =
511
9
              SM.getCharacterData(FILoc.getLocWithOffset(-2), &IsInvalid);
512
9
            if (!IsInvalid && *SourcePtr == ' ') {
513
0
              FILoc = FILoc.getLocWithOffset(-1);
514
0
              FIText = ":";
515
0
            }
516
9
          }
517
9
        }
518
519
9
        Diag(Tok, diag::err_expected)
520
9
            << tok::colon << FixItHint::CreateInsertion(FILoc, FIText);
521
9
        Diag(OpToken, diag::note_matching) << tok::question;
522
9
        ColonLoc = Tok.getLocation();
523
9
      }
524
56.3k
    }
525
526
3.53M
    PreferredType.enterBinary(Actions, Tok.getLocation(), LHS.get(),
527
3.53M
                              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
3.53M
    ExprResult RHS;
539
3.53M
    bool RHSIsInitList = false;
540
3.53M
    if (getLangOpts().CPlusPlus11 && 
Tok.is(tok::l_brace)2.21M
) {
541
75
      RHS = ParseBraceInitializer();
542
75
      RHSIsInitList = true;
543
3.53M
    } else if (getLangOpts().CPlusPlus && 
NextTokPrec <= prec::Conditional2.25M
)
544
647k
      RHS = ParseAssignmentExpression();
545
2.88M
    else
546
2.88M
      RHS = ParseCastExpression(AnyCastExpr);
547
548
3.53M
    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
2.04k
      Actions.CorrectDelayedTyposInExpr(LHS);
552
2.04k
      if (TernaryMiddle.isUsable())
553
4
        TernaryMiddle = Actions.CorrectDelayedTyposInExpr(TernaryMiddle);
554
2.04k
      LHS = ExprError();
555
2.04k
    }
556
557
    // Remember the precedence of this operator and get the precedence of the
558
    // operator immediately to the right of the RHS.
559
3.53M
    prec::Level ThisPrec = NextTokPrec;
560
3.53M
    NextTokPrec = getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator,
561
3.53M
                                     getLangOpts().CPlusPlus11);
562
563
    // Assignment and conditional expressions are right-associative.
564
3.53M
    bool isRightAssoc = ThisPrec == prec::Conditional ||
565
3.48M
                        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
3.53M
    if (ThisPrec < NextTokPrec ||
570
3.40M
        (ThisPrec == NextTokPrec && 
isRightAssoc123k
)) {
571
136k
      if (!RHS.isInvalid() && 
RHSIsInitList136k
) {
572
4
        Diag(Tok, diag::err_init_list_bin_op)
573
4
          << /*LHS*/0 << PP.getSpelling(Tok) << Actions.getExprRange(RHS.get());
574
4
        RHS = ExprError();
575
4
      }
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
136k
      RHS = ParseRHSOfBinaryExpression(RHS,
582
136k
                            static_cast<prec::Level>(ThisPrec + !isRightAssoc));
583
136k
      RHSIsInitList = false;
584
585
136k
      if (RHS.isInvalid()) {
586
        // FIXME: Errors generated by the delayed typo correction should be
587
        // printed before errors from ParseRHSOfBinaryExpression, not after.
588
9
        Actions.CorrectDelayedTyposInExpr(LHS);
589
9
        if (TernaryMiddle.isUsable())
590
0
          TernaryMiddle = Actions.CorrectDelayedTyposInExpr(TernaryMiddle);
591
9
        LHS = ExprError();
592
9
      }
593
594
136k
      NextTokPrec = getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator,
595
136k
                                       getLangOpts().CPlusPlus11);
596
136k
    }
597
598
3.53M
    if (!RHS.isInvalid() && 
RHSIsInitList3.53M
) {
599
71
      if (ThisPrec == prec::Assignment) {
600
68
        Diag(OpToken, diag::warn_cxx98_compat_generalized_initializer_lists)
601
68
          << Actions.getExprRange(RHS.get());
602
3
      } else if (ColonLoc.isValid()) {
603
1
        Diag(ColonLoc, diag::err_init_list_bin_op)
604
1
          << /*RHS*/1 << ":"
605
1
          << Actions.getExprRange(RHS.get());
606
1
        LHS = ExprError();
607
2
      } else {
608
2
        Diag(OpToken, diag::err_init_list_bin_op)
609
2
          << /*RHS*/1 << PP.getSpelling(OpToken)
610
2
          << Actions.getExprRange(RHS.get());
611
2
        LHS = ExprError();
612
2
      }
613
71
    }
614
615
3.53M
    ExprResult OrigLHS = LHS;
616
3.53M
    if (!LHS.isInvalid()) {
617
      // Combine the LHS and RHS into the LHS (e.g. build AST).
618
3.53M
      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
3.47M
        if (!GreaterThanIsOperator && 
OpToken.is(tok::greatergreater)105k
)
623
4
          SuggestParentheses(OpToken.getLocation(),
624
4
                             diag::warn_cxx11_right_shift_in_template_arg,
625
4
                         SourceRange(Actions.getExprRange(LHS.get()).getBegin(),
626
4
                                     Actions.getExprRange(RHS.get()).getEnd()));
627
628
3.47M
        ExprResult BinOp =
629
3.47M
            Actions.ActOnBinOp(getCurScope(), OpToken.getLocation(),
630
3.47M
                               OpToken.getKind(), LHS.get(), RHS.get());
631
3.47M
        if (BinOp.isInvalid())
632
3.44k
          BinOp = Actions.CreateRecoveryExpr(LHS.get()->getBeginLoc(),
633
3.44k
                                             RHS.get()->getEndLoc(),
634
3.44k
                                             {LHS.get(), RHS.get()});
635
636
3.47M
        LHS = BinOp;
637
56.1k
      } else {
638
56.1k
        ExprResult CondOp = Actions.ActOnConditionalOp(
639
56.1k
            OpToken.getLocation(), ColonLoc, LHS.get(), TernaryMiddle.get(),
640
56.1k
            RHS.get());
641
56.1k
        if (CondOp.isInvalid()) {
642
257
          std::vector<clang::Expr *> Args;
643
          // TernaryMiddle can be null for the GNU conditional expr extension.
644
257
          if (TernaryMiddle.get())
645
251
            Args = {LHS.get(), TernaryMiddle.get(), RHS.get()};
646
6
          else
647
6
            Args = {LHS.get(), RHS.get()};
648
257
          CondOp = Actions.CreateRecoveryExpr(LHS.get()->getBeginLoc(),
649
257
                                              RHS.get()->getEndLoc(), Args);
650
257
        }
651
652
56.1k
        LHS = CondOp;
653
56.1k
      }
654
      // In this case, ActOnBinOp or ActOnConditionalOp performed the
655
      // CorrectDelayedTyposInExpr check.
656
3.53M
      if (!getLangOpts().CPlusPlus)
657
1.28M
        continue;
658
2.25M
    }
659
660
    // Ensure potential typos aren't left undiagnosed.
661
2.25M
    if (LHS.isInvalid()) {
662
2.65k
      Actions.CorrectDelayedTyposInExpr(OrigLHS);
663
2.65k
      Actions.CorrectDelayedTyposInExpr(TernaryMiddle);
664
2.65k
      Actions.CorrectDelayedTyposInExpr(RHS);
665
2.65k
    }
666
2.25M
  }
667
34.9M
}
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
37.2M
                                       bool *NotPrimaryExpression) {
680
37.2M
  bool NotCastExpr;
681
37.2M
  ExprResult Res = ParseCastExpression(ParseKind,
682
37.2M
                                       isAddressOfOperand,
683
37.2M
                                       NotCastExpr,
684
37.2M
                                       isTypeCast,
685
37.2M
                                       isVectorLiteral,
686
37.2M
                                       NotPrimaryExpression);
687
37.2M
  if (NotCastExpr)
688
14.5k
    Diag(Tok, diag::err_expected_expression);
689
37.2M
  return Res;
690
37.2M
}
691
692
namespace {
693
class CastExpressionIdValidator final : public CorrectionCandidateCallback {
694
 public:
695
  CastExpressionIdValidator(Token Next, bool AllowTypes, bool AllowNonTypes)
696
12.8M
      : NextToken(Next), AllowNonTypes(AllowNonTypes) {
697
12.8M
    WantTypeSpecifiers = WantFunctionLikeCasts = AllowTypes;
698
12.8M
  }
699
700
524
  bool ValidateCandidate(const TypoCorrection &candidate) override {
701
524
    NamedDecl *ND = candidate.getCorrectionDecl();
702
524
    if (!ND)
703
14
      return candidate.isKeyword();
704
705
510
    if (isa<TypeDecl>(ND))
706
36
      return WantTypeSpecifiers;
707
708
474
    if (!AllowNonTypes || 
!CorrectionCandidateCallback::ValidateCandidate(candidate)466
)
709
8
      return false;
710
711
466
    if (!NextToken.isOneOf(tok::equal, tok::arrow, tok::period))
712
301
      return true;
713
714
165
    for (auto *C : candidate) {
715
165
      NamedDecl *ND = C->getUnderlyingDecl();
716
165
      if (isa<ValueDecl>(ND) && 
!isa<FunctionDecl>(ND)162
)
717
156
        return true;
718
165
    }
719
9
    return false;
720
165
  }
721
722
2.78k
  std::unique_ptr<CorrectionCandidateCallback> clone() override {
723
2.78k
    return std::make_unique<CastExpressionIdValidator>(*this);
724
2.78k
  }
725
726
 private:
727
  Token NextToken;
728
  bool AllowNonTypes;
729
};
730
}
731
732
/// Parse a cast-expression, or, if \pisUnaryExpression is true, parse
733
/// a unary-expression.
734
///
735
/// \p isAddressOfOperand exists because an id-expression that is the operand
736
/// of address-of gets special treatment due to member pointers. NotCastExpr
737
/// is set to true if the token is not the start of a cast-expression, and no
738
/// diagnostic is emitted in this case and no tokens are consumed.
739
///
740
/// \verbatim
741
///       cast-expression: [C99 6.5.4]
742
///         unary-expression
743
///         '(' type-name ')' cast-expression
744
///
745
///       unary-expression:  [C99 6.5.3]
746
///         postfix-expression
747
///         '++' unary-expression
748
///         '--' unary-expression
749
/// [Coro]  'co_await' cast-expression
750
///         unary-operator cast-expression
751
///         'sizeof' unary-expression
752
///         'sizeof' '(' type-name ')'
753
/// [C++11] 'sizeof' '...' '(' identifier ')'
754
/// [GNU]   '__alignof' unary-expression
755
/// [GNU]   '__alignof' '(' type-name ')'
756
/// [C11]   '_Alignof' '(' type-name ')'
757
/// [C++11] 'alignof' '(' type-id ')'
758
/// [GNU]   '&&' identifier
759
/// [C++11] 'noexcept' '(' expression ')' [C++11 5.3.7]
760
/// [C++]   new-expression
761
/// [C++]   delete-expression
762
///
763
///       unary-operator: one of
764
///         '&'  '*'  '+'  '-'  '~'  '!'
765
/// [GNU]   '__extension__'  '__real'  '__imag'
766
///
767
///       primary-expression: [C99 6.5.1]
768
/// [C99]   identifier
769
/// [C++]   id-expression
770
///         constant
771
///         string-literal
772
/// [C++]   boolean-literal  [C++ 2.13.5]
773
/// [C++11] 'nullptr'        [C++11 2.14.7]
774
/// [C++11] user-defined-literal
775
///         '(' expression ')'
776
/// [C11]   generic-selection
777
/// [C++2a] requires-expression
778
///         '__func__'        [C99 6.4.2.2]
779
/// [GNU]   '__FUNCTION__'
780
/// [MS]    '__FUNCDNAME__'
781
/// [MS]    'L__FUNCTION__'
782
/// [MS]    '__FUNCSIG__'
783
/// [MS]    'L__FUNCSIG__'
784
/// [GNU]   '__PRETTY_FUNCTION__'
785
/// [GNU]   '(' compound-statement ')'
786
/// [GNU]   '__builtin_va_arg' '(' assignment-expression ',' type-name ')'
787
/// [GNU]   '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')'
788
/// [GNU]   '__builtin_choose_expr' '(' assign-expr ',' assign-expr ','
789
///                                     assign-expr ')'
790
/// [GNU]   '__builtin_FILE' '(' ')'
791
/// [GNU]   '__builtin_FUNCTION' '(' ')'
792
/// [GNU]   '__builtin_LINE' '(' ')'
793
/// [CLANG] '__builtin_COLUMN' '(' ')'
794
/// [GNU]   '__builtin_types_compatible_p' '(' type-name ',' type-name ')'
795
/// [GNU]   '__null'
796
/// [OBJC]  '[' objc-message-expr ']'
797
/// [OBJC]  '\@selector' '(' objc-selector-arg ')'
798
/// [OBJC]  '\@protocol' '(' identifier ')'
799
/// [OBJC]  '\@encode' '(' type-name ')'
800
/// [OBJC]  objc-string-literal
801
/// [C++]   simple-type-specifier '(' expression-list[opt] ')'      [C++ 5.2.3]
802
/// [C++11] simple-type-specifier braced-init-list                  [C++11 5.2.3]
803
/// [C++]   typename-specifier '(' expression-list[opt] ')'         [C++ 5.2.3]
804
/// [C++11] typename-specifier braced-init-list                     [C++11 5.2.3]
805
/// [C++]   'const_cast' '<' type-name '>' '(' expression ')'       [C++ 5.2p1]
806
/// [C++]   'dynamic_cast' '<' type-name '>' '(' expression ')'     [C++ 5.2p1]
807
/// [C++]   'reinterpret_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1]
808
/// [C++]   'static_cast' '<' type-name '>' '(' expression ')'      [C++ 5.2p1]
809
/// [C++]   'typeid' '(' expression ')'                             [C++ 5.2p1]
810
/// [C++]   'typeid' '(' type-id ')'                                [C++ 5.2p1]
811
/// [C++]   'this'          [C++ 9.3.2]
812
/// [G++]   unary-type-trait '(' type-id ')'
813
/// [G++]   binary-type-trait '(' type-id ',' type-id ')'           [TODO]
814
/// [EMBT]  array-type-trait '(' type-id ',' integer ')'
815
/// [clang] '^' block-literal
816
///
817
///       constant: [C99 6.4.4]
818
///         integer-constant
819
///         floating-constant
820
///         enumeration-constant -> identifier
821
///         character-constant
822
///
823
///       id-expression: [C++ 5.1]
824
///                   unqualified-id
825
///                   qualified-id
826
///
827
///       unqualified-id: [C++ 5.1]
828
///                   identifier
829
///                   operator-function-id
830
///                   conversion-function-id
831
///                   '~' class-name
832
///                   template-id
833
///
834
///       new-expression: [C++ 5.3.4]
835
///                   '::'[opt] 'new' new-placement[opt] new-type-id
836
///                                     new-initializer[opt]
837
///                   '::'[opt] 'new' new-placement[opt] '(' type-id ')'
838
///                                     new-initializer[opt]
839
///
840
///       delete-expression: [C++ 5.3.5]
841
///                   '::'[opt] 'delete' cast-expression
842
///                   '::'[opt] 'delete' '[' ']' cast-expression
843
///
844
/// [GNU/Embarcadero] unary-type-trait:
845
///                   '__is_arithmetic'
846
///                   '__is_floating_point'
847
///                   '__is_integral'
848
///                   '__is_lvalue_expr'
849
///                   '__is_rvalue_expr'
850
///                   '__is_complete_type'
851
///                   '__is_void'
852
///                   '__is_array'
853
///                   '__is_function'
854
///                   '__is_reference'
855
///                   '__is_lvalue_reference'
856
///                   '__is_rvalue_reference'
857
///                   '__is_fundamental'
858
///                   '__is_object'
859
///                   '__is_scalar'
860
///                   '__is_compound'
861
///                   '__is_pointer'
862
///                   '__is_member_object_pointer'
863
///                   '__is_member_function_pointer'
864
///                   '__is_member_pointer'
865
///                   '__is_const'
866
///                   '__is_volatile'
867
///                   '__is_trivial'
868
///                   '__is_standard_layout'
869
///                   '__is_signed'
870
///                   '__is_unsigned'
871
///
872
/// [GNU] unary-type-trait:
873
///                   '__has_nothrow_assign'
874
///                   '__has_nothrow_copy'
875
///                   '__has_nothrow_constructor'
876
///                   '__has_trivial_assign'                  [TODO]
877
///                   '__has_trivial_copy'                    [TODO]
878
///                   '__has_trivial_constructor'
879
///                   '__has_trivial_destructor'
880
///                   '__has_virtual_destructor'
881
///                   '__is_abstract'                         [TODO]
882
///                   '__is_class'
883
///                   '__is_empty'                            [TODO]
884
///                   '__is_enum'
885
///                   '__is_final'
886
///                   '__is_pod'
887
///                   '__is_polymorphic'
888
///                   '__is_sealed'                           [MS]
889
///                   '__is_trivial'
890
///                   '__is_union'
891
///                   '__has_unique_object_representations'
892
///
893
/// [Clang] unary-type-trait:
894
///                   '__is_aggregate'
895
///                   '__trivially_copyable'
896
///
897
///       binary-type-trait:
898
/// [GNU]             '__is_base_of'
899
/// [MS]              '__is_convertible_to'
900
///                   '__is_convertible'
901
///                   '__is_same'
902
///
903
/// [Embarcadero] array-type-trait:
904
///                   '__array_rank'
905
///                   '__array_extent'
906
///
907
/// [Embarcadero] expression-trait:
908
///                   '__is_lvalue_expr'
909
///                   '__is_rvalue_expr'
910
/// \endverbatim
911
///
912
ExprResult Parser::ParseCastExpression(CastParseKind ParseKind,
913
                                       bool isAddressOfOperand,
914
                                       bool &NotCastExpr,
915
                                       TypeCastState isTypeCast,
916
                                       bool isVectorLiteral,
917
38.6M
                                       bool *NotPrimaryExpression) {
918
38.6M
  ExprResult Res;
919
38.6M
  tok::TokenKind SavedKind = Tok.getKind();
920
38.6M
  auto SavedType = PreferredType;
921
38.6M
  NotCastExpr = false;
922
923
  // Are postfix-expression suffix operators permitted after this
924
  // cast-expression? If not, and we find some, we'll parse them anyway and
925
  // diagnose them.
926
38.6M
  bool AllowSuffix = true;
927
928
  // This handles all of cast-expression, unary-expression, postfix-expression,
929
  // and primary-expression.  We handle them together like this for efficiency
930
  // and to simplify handling of an expression starting with a '(' token: which
931
  // may be one of a parenthesized expression, cast-expression, compound literal
932
  // expression, or statement expression.
933
  //
934
  // If the parsed tokens consist of a primary-expression, the cases below
935
  // break out of the switch;  at the end we call ParsePostfixExpressionSuffix
936
  // to handle the postfix expression suffixes.  Cases that cannot be followed
937
  // by postfix exprs should set AllowSuffix to false.
938
38.6M
  switch (SavedKind) {
939
5.33M
  case tok::l_paren: {
940
    // If this expression is limited to being a unary-expression, the paren can
941
    // not start a cast expression.
942
5.33M
    ParenParseOption ParenExprType;
943
5.33M
    switch (ParseKind) {
944
2.93k
      case CastParseKind::UnaryExprOnly:
945
2.93k
        if (!getLangOpts().CPlusPlus)
946
0
          ParenExprType = CompoundLiteral;
947
2.93k
        LLVM_FALLTHROUGH;
948
5.33M
      case CastParseKind::AnyCastExpr:
949
5.33M
        ParenExprType = ParenParseOption::CastExpr;
950
5.33M
        break;
951
125
      case CastParseKind::PrimaryExprOnly:
952
125
        ParenExprType = FoldExpr;
953
125
        break;
954
5.33M
    }
955
5.33M
    ParsedType CastTy;
956
5.33M
    SourceLocation RParenLoc;
957
5.33M
    Res = ParseParenExpression(ParenExprType, false/*stopIfCastExr*/,
958
5.33M
                               isTypeCast == IsTypeCast, CastTy, RParenLoc);
959
960
    // FIXME: What should we do if a vector literal is followed by a
961
    // postfix-expression suffix? Usually postfix operators are permitted on
962
    // literals.
963
5.33M
    if (isVectorLiteral)
964
151
      return Res;
965
966
5.33M
    switch (ParenExprType) {
967
1.04M
    case SimpleExpr:   break;    // Nothing else to do.
968
8.86k
    case CompoundStmt: break;  // Nothing else to do.
969
50.5k
    case CompoundLiteral:
970
      // We parsed '(' type-name ')' '{' ... '}'.  If any suffixes of
971
      // postfix-expression exist, parse them now.
972
50.5k
      break;
973
4.23M
    case CastExpr:
974
      // We have parsed the cast-expression and no postfix-expr pieces are
975
      // following.
976
4.23M
      return Res;
977
206
    case FoldExpr:
978
      // We only parsed a fold-expression. There might be postfix-expr pieces
979
      // afterwards; parse them now.
980
206
      break;
981
1.10M
    }
982
983
1.10M
    break;
984
1.10M
  }
985
986
    // primary-expression
987
8.46M
  case tok::numeric_constant:
988
    // constant: integer-constant
989
    // constant: floating-constant
990
991
8.46M
    Res = Actions.ActOnNumericConstant(Tok, /*UDLScope*/getCurScope());
992
8.46M
    ConsumeToken();
993
8.46M
    break;
994
995
153k
  case tok::kw_true:
996
289k
  case tok::kw_false:
997
289k
    Res = ParseCXXBoolLiteral();
998
289k
    break;
999
1000
602
  case tok::kw___objc_yes:
1001
1.08k
  case tok::kw___objc_no:
1002
1.08k
    Res = ParseObjCBoolLiteral();
1003
1.08k
    break;
1004
1005
82.5k
  case tok::kw_nullptr:
1006
82.5k
    Diag(Tok, diag::warn_cxx98_compat_nullptr);
1007
82.5k
    Res = Actions.ActOnCXXNullPtrLiteral(ConsumeToken());
1008
82.5k
    break;
1009
1010
14
  case tok::annot_primary_expr:
1011
625k
  case tok::annot_overload_set:
1012
625k
    Res = getExprAnnotation(Tok);
1013
625k
    if (!Res.isInvalid() && Tok.getKind() == tok::annot_overload_set)
1014
625k
      Res = Actions.ActOnNameClassifiedAsOverloadSet(getCurScope(), Res.get());
1015
625k
    ConsumeAnnotationToken();
1016
625k
    if (!Res.isInvalid() && 
Tok.is(tok::less)625k
)
1017
22
      checkPotentialAngleBracket(Res);
1018
625k
    break;
1019
1020
1.76M
  case tok::annot_non_type:
1021
1.76M
  case tok::annot_non_type_dependent:
1022
1.76M
  case tok::annot_non_type_undeclared: {
1023
1.76M
    CXXScopeSpec SS;
1024
1.76M
    Token Replacement;
1025
1.76M
    Res = tryParseCXXIdExpression(SS, isAddressOfOperand, Replacement);
1026
1.76M
    assert(!Res.isUnset() &&
1027
1.76M
           "should not perform typo correction on annotation token");
1028
1.76M
    break;
1029
1.76M
  }
1030
1031
3
  case tok::kw___super:
1032
1.11k
  case tok::kw_decltype:
1033
    // Annotate the token and tail recurse.
1034
1.11k
    if (TryAnnotateTypeOrScopeToken())
1035
0
      return ExprError();
1036
1.11k
    assert(Tok.isNot(tok::kw_decltype) && Tok.isNot(tok::kw___super));
1037
1.11k
    return ParseCastExpression(ParseKind, isAddressOfOperand, isTypeCast,
1038
1.11k
                               isVectorLiteral, NotPrimaryExpression);
1039
1040
13.9M
  case tok::identifier: {      // primary-expression: identifier
1041
                               // unqualified-id: identifier
1042
                               // constant: enumeration-constant
1043
    // Turn a potentially qualified name into a annot_typename or
1044
    // annot_cxxscope if it would be valid.  This handles things like x::y, etc.
1045
13.9M
    if (getLangOpts().CPlusPlus) {
1046
      // Avoid the unnecessary parse-time lookup in the common case
1047
      // where the syntax forbids a type.
1048
6.75M
      const Token &Next = NextToken();
1049
1050
      // If this identifier was reverted from a token ID, and the next token
1051
      // is a parenthesis, this is likely to be a use of a type trait. Check
1052
      // those tokens.
1053
6.75M
      if (Next.is(tok::l_paren) &&
1054
840k
          Tok.is(tok::identifier) &&
1055
840k
          Tok.getIdentifierInfo()->hasRevertedTokenIDToIdentifier()) {
1056
104
        IdentifierInfo *II = Tok.getIdentifierInfo();
1057
        // Build up the mapping of revertible type traits, for future use.
1058
104
        if (RevertibleTypeTraits.empty()) {
1059
153
#define RTT_JOIN(X,Y) X##Y
1060
3
#define REVERTIBLE_TYPE_TRAIT(Name)                         \
1061
153
          RevertibleTypeTraits[PP.getIdentifierInfo(#Name)] \
1062
153
            = RTT_JOIN(tok::kw_,Name)
1063
1064
3
          REVERTIBLE_TYPE_TRAIT(__is_abstract);
1065
3
          REVERTIBLE_TYPE_TRAIT(__is_aggregate);
1066
3
          REVERTIBLE_TYPE_TRAIT(__is_arithmetic);
1067
3
          REVERTIBLE_TYPE_TRAIT(__is_array);
1068
3
          REVERTIBLE_TYPE_TRAIT(__is_assignable);
1069
3
          REVERTIBLE_TYPE_TRAIT(__is_base_of);
1070
3
          REVERTIBLE_TYPE_TRAIT(__is_class);
1071
3
          REVERTIBLE_TYPE_TRAIT(__is_complete_type);
1072
3
          REVERTIBLE_TYPE_TRAIT(__is_compound);
1073
3
          REVERTIBLE_TYPE_TRAIT(__is_const);
1074
3
          REVERTIBLE_TYPE_TRAIT(__is_constructible);
1075
3
          REVERTIBLE_TYPE_TRAIT(__is_convertible);
1076
3
          REVERTIBLE_TYPE_TRAIT(__is_convertible_to);
1077
3
          REVERTIBLE_TYPE_TRAIT(__is_destructible);
1078
3
          REVERTIBLE_TYPE_TRAIT(__is_empty);
1079
3
          REVERTIBLE_TYPE_TRAIT(__is_enum);
1080
3
          REVERTIBLE_TYPE_TRAIT(__is_floating_point);
1081
3
          REVERTIBLE_TYPE_TRAIT(__is_final);
1082
3
          REVERTIBLE_TYPE_TRAIT(__is_function);
1083
3
          REVERTIBLE_TYPE_TRAIT(__is_fundamental);
1084
3
          REVERTIBLE_TYPE_TRAIT(__is_integral);
1085
3
          REVERTIBLE_TYPE_TRAIT(__is_interface_class);
1086
3
          REVERTIBLE_TYPE_TRAIT(__is_literal);
1087
3
          REVERTIBLE_TYPE_TRAIT(__is_lvalue_expr);
1088
3
          REVERTIBLE_TYPE_TRAIT(__is_lvalue_reference);
1089
3
          REVERTIBLE_TYPE_TRAIT(__is_member_function_pointer);
1090
3
          REVERTIBLE_TYPE_TRAIT(__is_member_object_pointer);
1091
3
          REVERTIBLE_TYPE_TRAIT(__is_member_pointer);
1092
3
          REVERTIBLE_TYPE_TRAIT(__is_nothrow_assignable);
1093
3
          REVERTIBLE_TYPE_TRAIT(__is_nothrow_constructible);
1094
3
          REVERTIBLE_TYPE_TRAIT(__is_nothrow_destructible);
1095
3
          REVERTIBLE_TYPE_TRAIT(__is_object);
1096
3
          REVERTIBLE_TYPE_TRAIT(__is_pod);
1097
3
          REVERTIBLE_TYPE_TRAIT(__is_pointer);
1098
3
          REVERTIBLE_TYPE_TRAIT(__is_polymorphic);
1099
3
          REVERTIBLE_TYPE_TRAIT(__is_reference);
1100
3
          REVERTIBLE_TYPE_TRAIT(__is_rvalue_expr);
1101
3
          REVERTIBLE_TYPE_TRAIT(__is_rvalue_reference);
1102
3
          REVERTIBLE_TYPE_TRAIT(__is_same);
1103
3
          REVERTIBLE_TYPE_TRAIT(__is_scalar);
1104
3
          REVERTIBLE_TYPE_TRAIT(__is_sealed);
1105
3
          REVERTIBLE_TYPE_TRAIT(__is_signed);
1106
3
          REVERTIBLE_TYPE_TRAIT(__is_standard_layout);
1107
3
          REVERTIBLE_TYPE_TRAIT(__is_trivial);
1108
3
          REVERTIBLE_TYPE_TRAIT(__is_trivially_assignable);
1109
3
          REVERTIBLE_TYPE_TRAIT(__is_trivially_constructible);
1110
3
          REVERTIBLE_TYPE_TRAIT(__is_trivially_copyable);
1111
3
          REVERTIBLE_TYPE_TRAIT(__is_union);
1112
3
          REVERTIBLE_TYPE_TRAIT(__is_unsigned);
1113
3
          REVERTIBLE_TYPE_TRAIT(__is_void);
1114
3
          REVERTIBLE_TYPE_TRAIT(__is_volatile);
1115
3
#undef REVERTIBLE_TYPE_TRAIT
1116
3
#undef RTT_JOIN
1117
3
        }
1118
1119
        // If we find that this is in fact the name of a type trait,
1120
        // update the token kind in place and parse again to treat it as
1121
        // the appropriate kind of type trait.
1122
104
        llvm::SmallDenseMap<IdentifierInfo *, tok::TokenKind>::iterator Known
1123
104
          = RevertibleTypeTraits.find(II);
1124
104
        if (Known != RevertibleTypeTraits.end()) {
1125
104
          Tok.setKind(Known->second);
1126
104
          return ParseCastExpression(ParseKind, isAddressOfOperand,
1127
104
                                     NotCastExpr, isTypeCast,
1128
104
                                     isVectorLiteral, NotPrimaryExpression);
1129
104
        }
1130
6.75M
      }
1131
1132
6.75M
      if ((!ColonIsSacred && 
Next.is(tok::colon)6.40M
) ||
1133
6.75M
          Next.isOneOf(tok::coloncolon, tok::less, tok::l_paren,
1134
1.89M
                       tok::l_brace)) {
1135
        // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse.
1136
1.89M
        if (TryAnnotateTypeOrScopeToken())
1137
4
          return ExprError();
1138
1.89M
        if (!Tok.is(tok::identifier))
1139
1.06M
          return ParseCastExpression(ParseKind, isAddressOfOperand,
1140
1.06M
                                     NotCastExpr, isTypeCast,
1141
1.06M
                                     isVectorLiteral,
1142
1.06M
                                     NotPrimaryExpression);
1143
12.8M
      }
1144
6.75M
    }
1145
1146
    // Consume the identifier so that we can see if it is followed by a '(' or
1147
    // '.'.
1148
12.8M
    IdentifierInfo &II = *Tok.getIdentifierInfo();
1149
12.8M
    SourceLocation ILoc = ConsumeToken();
1150
1151
    // Support 'Class.property' and 'super.property' notation.
1152
12.8M
    if (getLangOpts().ObjC && 
Tok.is(tok::period)1.36M
&&
1153
39.9k
        (Actions.getTypeName(II, ILoc, getCurScope()) ||
1154
         // Allow the base to be 'super' if in an objc-method.
1155
39.7k
         (&II == Ident_super && 
getCurScope()->isInObjcMethodScope()79
))) {
1156
266
      ConsumeToken();
1157
1158
266
      if (Tok.is(tok::code_completion) && 
&II != Ident_super4
) {
1159
3
        Actions.CodeCompleteObjCClassPropertyRefExpr(
1160
3
            getCurScope(), II, ILoc, ExprStatementTokLoc == ILoc);
1161
3
        cutOffParsing();
1162
3
        return ExprError();
1163
3
      }
1164
      // Allow either an identifier or the keyword 'class' (in C++).
1165
263
      if (Tok.isNot(tok::identifier) &&
1166
2
          !(getLangOpts().CPlusPlus && 
Tok.is(tok::kw_class)1
)) {
1167
1
        Diag(Tok, diag::err_expected_property_name);
1168
1
        return ExprError();
1169
1
      }
1170
262
      IdentifierInfo &PropertyName = *Tok.getIdentifierInfo();
1171
262
      SourceLocation PropertyLoc = ConsumeToken();
1172
1173
262
      Res = Actions.ActOnClassPropertyRefExpr(II, PropertyName,
1174
262
                                              ILoc, PropertyLoc);
1175
262
      break;
1176
262
    }
1177
1178
    // In an Objective-C method, if we have "super" followed by an identifier,
1179
    // the token sequence is ill-formed. However, if there's a ':' or ']' after
1180
    // that identifier, this is probably a message send with a missing open
1181
    // bracket. Treat it as such.
1182
12.8M
    if (getLangOpts().ObjC && 
&II == Ident_super1.36M
&&
!InMessageExpression256
&&
1183
34
        getCurScope()->isInObjcMethodScope() &&
1184
31
        ((Tok.is(tok::identifier) &&
1185
28
         (NextToken().is(tok::colon) || 
NextToken().is(tok::r_square)2
)) ||
1186
29
         
Tok.is(tok::code_completion)3
)) {
1187
29
      Res = ParseObjCMessageExpressionBody(SourceLocation(), ILoc, nullptr,
1188
29
                                           nullptr);
1189
29
      break;
1190
29
    }
1191
1192
    // If we have an Objective-C class name followed by an identifier
1193
    // and either ':' or ']', this is an Objective-C class message
1194
    // send that's missing the opening '['. Recovery
1195
    // appropriately. Also take this path if we're performing code
1196
    // completion after an Objective-C class name.
1197
12.8M
    if (getLangOpts().ObjC &&
1198
1.36M
        ((Tok.is(tok::identifier) && 
!InMessageExpression11.7k
) ||
1199
1.36M
         Tok.is(tok::code_completion))) {
1200
159
      const Token& Next = NextToken();
1201
159
      if (Tok.is(tok::code_completion) ||
1202
117
          Next.is(tok::colon) || 
Next.is(tok::r_square)114
)
1203
117
        if (ParsedType Typ = Actions.getTypeName(II, ILoc, getCurScope()))
1204
74
          if (Typ.get()->isObjCObjectOrInterfaceType()) {
1205
            // Fake up a Declarator to use with ActOnTypeName.
1206
74
            DeclSpec DS(AttrFactory);
1207
74
            DS.SetRangeStart(ILoc);
1208
74
            DS.SetRangeEnd(ILoc);
1209
74
            const char *PrevSpec = nullptr;
1210
74
            unsigned DiagID;
1211
74
            DS.SetTypeSpecType(TST_typename, ILoc, PrevSpec, DiagID, Typ,
1212
74
                               Actions.getASTContext().getPrintingPolicy());
1213
1214
74
            Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName);
1215
74
            TypeResult Ty = Actions.ActOnTypeName(getCurScope(),
1216
74
                                                  DeclaratorInfo);
1217
74
            if (Ty.isInvalid())
1218
0
              break;
1219
1220
74
            Res = ParseObjCMessageExpressionBody(SourceLocation(),
1221
74
                                                 SourceLocation(),
1222
74
                                                 Ty.get(), nullptr);
1223
74
            break;
1224
74
          }
1225
159
    }
1226
1227
    // Make sure to pass down the right value for isAddressOfOperand.
1228
12.8M
    if (isAddressOfOperand && 
isPostfixExpressionSuffixStart()110k
)
1229
25.9k
      isAddressOfOperand = false;
1230
1231
    // Function designators are allowed to be undeclared (C99 6.5.1p2), so we
1232
    // need to know whether or not this identifier is a function designator or
1233
    // not.
1234
12.8M
    UnqualifiedId Name;
1235
12.8M
    CXXScopeSpec ScopeSpec;
1236
12.8M
    SourceLocation TemplateKWLoc;
1237
12.8M
    Token Replacement;
1238
12.8M
    CastExpressionIdValidator Validator(
1239
12.8M
        /*Next=*/Tok,
1240
12.8M
        /*AllowTypes=*/isTypeCast != NotTypeCast,
1241
12.8M
        /*AllowNonTypes=*/isTypeCast != IsTypeCast);
1242
12.8M
    Validator.IsAddressOfOperand = isAddressOfOperand;
1243
12.8M
    if (Tok.isOneOf(tok::periodstar, tok::arrowstar)) {
1244
115
      Validator.WantExpressionKeywords = false;
1245
115
      Validator.WantRemainingKeywords = false;
1246
12.8M
    } else {
1247
12.8M
      Validator.WantRemainingKeywords = Tok.isNot(tok::r_paren);
1248
12.8M
    }
1249
12.8M
    Name.setIdentifier(&II, ILoc);
1250
12.8M
    Res = Actions.ActOnIdExpression(
1251
12.8M
        getCurScope(), ScopeSpec, TemplateKWLoc, Name, Tok.is(tok::l_paren),
1252
12.8M
        isAddressOfOperand, &Validator,
1253
12.8M
        /*IsInlineAsmIdentifier=*/false,
1254
9.65M
        Tok.is(tok::r_paren) ? 
nullptr3.22M
: &Replacement);
1255
12.8M
    if (!Res.isInvalid() && 
Res.isUnset()12.8M
) {
1256
2
      UnconsumeToken(Replacement);
1257
2
      return ParseCastExpression(ParseKind, isAddressOfOperand,
1258
2
                                 NotCastExpr, isTypeCast,
1259
2
                                 /*isVectorLiteral=*/false,
1260
2
                                 NotPrimaryExpression);
1261
2
    }
1262
12.8M
    if (!Res.isInvalid() && 
Tok.is(tok::less)12.8M
)
1263
190k
      checkPotentialAngleBracket(Res);
1264
12.8M
    break;
1265
12.8M
  }
1266
707k
  case tok::char_constant:     // constant: character-constant
1267
709k
  case tok::wide_char_constant:
1268
709k
  case tok::utf8_char_constant:
1269
709k
  case tok::utf16_char_constant:
1270
709k
  case tok::utf32_char_constant:
1271
709k
    Res = Actions.ActOnCharacterConstant(Tok, /*UDLScope*/getCurScope());
1272
709k
    ConsumeToken();
1273
709k
    break;
1274
300
  case tok::kw___func__:       // primary-expression: __func__ [C99 6.4.2.2]
1275
497
  case tok::kw___FUNCTION__:   // primary-expression: __FUNCTION__ [GNU]
1276
506
  case tok::kw___FUNCDNAME__:   // primary-expression: __FUNCDNAME__ [MS]
1277
519
  case tok::kw___FUNCSIG__:     // primary-expression: __FUNCSIG__ [MS]
1278
527
  case tok::kw_L__FUNCTION__:   // primary-expression: L__FUNCTION__ [MS]
1279
533
  case tok::kw_L__FUNCSIG__:    // primary-expression: L__FUNCSIG__ [MS]
1280
742
  case tok::kw___PRETTY_FUNCTION__:  // primary-expression: __P..Y_F..N__ [GNU]
1281
742
    Res = Actions.ActOnPredefinedExpr(Tok.getLocation(), SavedKind);
1282
742
    ConsumeToken();
1283
742
    break;
1284
2.98M
  case tok::string_literal:    // primary-expression: string-literal
1285
2.98M
  case tok::wide_string_literal:
1286
2.98M
  case tok::utf8_string_literal:
1287
2.98M
  case tok::utf16_string_literal:
1288
2.98M
  case tok::utf32_string_literal:
1289
2.98M
    Res = ParseStringLiteralExpression(true);
1290
2.98M
    break;
1291
435
  case tok::kw__Generic:   // primary-expression: generic-selection [C11 6.5.1]
1292
435
    Res = ParseGenericSelectionExpression();
1293
435
    break;
1294
13
  case tok::kw___builtin_available:
1295
13
    Res = ParseAvailabilityCheckExpr(Tok.getLocation());
1296
13
    break;
1297
1.00k
  case tok::kw___builtin_va_arg:
1298
1.33k
  case tok::kw___builtin_offsetof:
1299
1.39k
  case tok::kw___builtin_choose_expr:
1300
1.42k
  case tok::kw___builtin_astype: // primary-expression: [OCL] as_type()
1301
21.0k
  case tok::kw___builtin_convertvector:
1302
21.0k
  case tok::kw___builtin_COLUMN:
1303
21.1k
  case tok::kw___builtin_FILE:
1304
21.1k
  case tok::kw___builtin_FUNCTION:
1305
21.1k
  case tok::kw___builtin_LINE:
1306
21.1k
    if (NotPrimaryExpression)
1307
0
      *NotPrimaryExpression = true;
1308
    // This parses the complete suffix; we can return early.
1309
21.1k
    return ParseBuiltinPrimaryExpression();
1310
2.41k
  case tok::kw___null:
1311
2.41k
    Res = Actions.ActOnGNUNullExpr(ConsumeToken());
1312
2.41k
    break;
1313
1314
277k
  case tok::plusplus:      // unary-expression: '++' unary-expression [C99]
1315
335k
  case tok::minusminus: {  // unary-expression: '--' unary-expression [C99]
1316
335k
    if (NotPrimaryExpression)
1317
0
      *NotPrimaryExpression = true;
1318
    // C++ [expr.unary] has:
1319
    //   unary-expression:
1320
    //     ++ cast-expression
1321
    //     -- cast-expression
1322
335k
    Token SavedTok = Tok;
1323
335k
    ConsumeToken();
1324
1325
335k
    PreferredType.enterUnary(Actions, Tok.getLocation(), SavedTok.getKind(),
1326
335k
                             SavedTok.getLocation());
1327
    // One special case is implicitly handled here: if the preceding tokens are
1328
    // an ambiguous cast expression, such as "(T())++", then we recurse to
1329
    // determine whether the '++' is prefix or postfix.
1330
335k
    Res = ParseCastExpression(getLangOpts().CPlusPlus ?
1331
325k
                                  UnaryExprOnly : 
AnyCastExpr9.35k
,
1332
335k
                              /*isAddressOfOperand*/false, NotCastExpr,
1333
335k
                              NotTypeCast);
1334
335k
    if (NotCastExpr) {
1335
      // If we return with NotCastExpr = true, we must not consume any tokens,
1336
      // so put the token back where we found it.
1337
7
      assert(Res.isInvalid());
1338
7
      UnconsumeToken(SavedTok);
1339
7
      return ExprError();
1340
7
    }
1341
335k
    if (!Res.isInvalid()) {
1342
335k
      Expr *Arg = Res.get();
1343
335k
      Res = Actions.ActOnUnaryOp(getCurScope(), SavedTok.getLocation(),
1344
335k
                                 SavedKind, Arg);
1345
335k
      if (Res.isInvalid())
1346
68
        Res = Actions.CreateRecoveryExpr(SavedTok.getLocation(),
1347
68
                                         Arg->getEndLoc(), Arg);
1348
335k
    }
1349
335k
    return Res;
1350
335k
  }
1351
124k
  case tok::amp: {         // unary-expression: '&' cast-expression
1352
124k
    if (NotPrimaryExpression)
1353
0
      *NotPrimaryExpression = true;
1354
    // Special treatment because of member pointers
1355
124k
    SourceLocation SavedLoc = ConsumeToken();
1356
124k
    PreferredType.enterUnary(Actions, Tok.getLocation(), tok::amp, SavedLoc);
1357
124k
    Res = ParseCastExpression(AnyCastExpr, true);
1358
124k
    if (!Res.isInvalid()) {
1359
123k
      Expr *Arg = Res.get();
1360
123k
      Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Arg);
1361
123k
      if (Res.isInvalid())
1362
191
        Res = Actions.CreateRecoveryExpr(Tok.getLocation(), Arg->getEndLoc(),
1363
191
                                         Arg);
1364
123k
    }
1365
124k
    return Res;
1366
335k
  }
1367
1368
490k
  case tok::star:          // unary-expression: '*' cast-expression
1369
491k
  case tok::plus:          // unary-expression: '+' cast-expression
1370
1.68M
  case tok::minus:         // unary-expression: '-' cast-expression
1371
1.75M
  case tok::tilde:         // unary-expression: '~' cast-expression
1372
1.91M
  case tok::exclaim:       // unary-expression: '!' cast-expression
1373
1.91M
  case tok::kw___real:     // unary-expression: '__real' cast-expression [GNU]
1374
1.91M
  case tok::kw___imag: {   // unary-expression: '__imag' cast-expression [GNU]
1375
1.91M
    if (NotPrimaryExpression)
1376
0
      *NotPrimaryExpression = true;
1377
1.91M
    SourceLocation SavedLoc = ConsumeToken();
1378
1.91M
    PreferredType.enterUnary(Actions, Tok.getLocation(), SavedKind, SavedLoc);
1379
1.91M
    Res = ParseCastExpression(AnyCastExpr);
1380
1.91M
    if (!Res.isInvalid()) {
1381
1.91M
      Expr *Arg = Res.get();
1382
1.91M
      Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Arg);
1383
1.91M
      if (Res.isInvalid())
1384
167
        Res = Actions.CreateRecoveryExpr(SavedLoc, Arg->getEndLoc(), Arg);
1385
1.91M
    }
1386
1.91M
    return Res;
1387
1.91M
  }
1388
1389
124
  case tok::kw_co_await: {  // unary-expression: 'co_await' cast-expression
1390
124
    if (NotPrimaryExpression)
1391
0
      *NotPrimaryExpression = true;
1392
124
    SourceLocation CoawaitLoc = ConsumeToken();
1393
124
    Res = ParseCastExpression(AnyCastExpr);
1394
124
    if (!Res.isInvalid())
1395
124
      Res = Actions.ActOnCoawaitExpr(getCurScope(), CoawaitLoc, Res.get());
1396
124
    return Res;
1397
1.91M
  }
1398
1399
31.9k
  case tok::kw___extension__:{//unary-expression:'__extension__' cast-expr [GNU]
1400
    // __extension__ silences extension warnings in the subexpression.
1401
31.9k
    if (NotPrimaryExpression)
1402
0
      *NotPrimaryExpression = true;
1403
31.9k
    ExtensionRAIIObject O(Diags);  // Use RAII to do this.
1404
31.9k
    SourceLocation SavedLoc = ConsumeToken();
1405
31.9k
    Res = ParseCastExpression(AnyCastExpr);
1406
31.9k
    if (!Res.isInvalid())
1407
31.9k
      Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get());
1408
31.9k
    return Res;
1409
1.91M
  }
1410
96
  case tok::kw__Alignof:   // unary-expression: '_Alignof' '(' type-name ')'
1411
96
    if (!getLangOpts().C11)
1412
26
      Diag(Tok, diag::ext_c11_feature) << Tok.getName();
1413
96
    LLVM_FALLTHROUGH;
1414
6.00k
  case tok::kw_alignof:    // unary-expression: 'alignof' '(' type-id ')'
1415
8.59k
  case tok::kw___alignof:  // unary-expression: '__alignof' unary-expression
1416
                           // unary-expression: '__alignof' '(' type-name ')'
1417
131k
  case tok::kw_sizeof:     // unary-expression: 'sizeof' unary-expression
1418
                           // unary-expression: 'sizeof' '(' type-name ')'
1419
131k
  case tok::kw_vec_step:   // unary-expression: OpenCL 'vec_step' expression
1420
  // unary-expression: '__builtin_omp_required_simd_align' '(' type-name ')'
1421
131k
  case tok::kw___builtin_omp_required_simd_align:
1422
131k
    if (NotPrimaryExpression)
1423
2
      *NotPrimaryExpression = true;
1424
131k
    AllowSuffix = false;
1425
131k
    Res = ParseUnaryExprOrTypeTraitExpression();
1426
131k
    break;
1427
265
  case tok::ampamp: {      // unary-expression: '&&' identifier
1428
265
    if (NotPrimaryExpression)
1429
0
      *NotPrimaryExpression = true;
1430
265
    SourceLocation AmpAmpLoc = ConsumeToken();
1431
265
    if (Tok.isNot(tok::identifier))
1432
0
      return ExprError(Diag(Tok, diag::err_expected) << tok::identifier);
1433
1434
265
    if (getCurScope()->getFnParent() == nullptr)
1435
1
      return ExprError(Diag(Tok, diag::err_address_of_label_outside_fn));
1436
1437
264
    Diag(AmpAmpLoc, diag::ext_gnu_address_of_label);
1438
264
    LabelDecl *LD = Actions.LookupOrCreateLabel(Tok.getIdentifierInfo(),
1439
264
                                                Tok.getLocation());
1440
264
    Res = Actions.ActOnAddrLabel(AmpAmpLoc, Tok.getLocation(), LD);
1441
264
    ConsumeToken();
1442
264
    AllowSuffix = false;
1443
264
    break;
1444
264
  }
1445
4.66k
  case tok::kw_const_cast:
1446
5.89k
  case tok::kw_dynamic_cast:
1447
13.9k
  case tok::kw_reinterpret_cast:
1448
119k
  case tok::kw_static_cast:
1449
119k
  case tok::kw_addrspace_cast:
1450
119k
    if (NotPrimaryExpression)
1451
0
      *NotPrimaryExpression = true;
1452
119k
    Res = ParseCXXCasts();
1453
119k
    break;
1454
602
  case tok::kw___builtin_bit_cast:
1455
602
    if (NotPrimaryExpression)
1456
0
      *NotPrimaryExpression = true;
1457
602
    Res = ParseBuiltinBitCast();
1458
602
    break;
1459
5.32k
  case tok::kw_typeid:
1460
5.32k
    if (NotPrimaryExpression)
1461
0
      *NotPrimaryExpression = true;
1462
5.32k
    Res = ParseCXXTypeid();
1463
5.32k
    break;
1464
171
  case tok::kw___uuidof:
1465
171
    if (NotPrimaryExpression)
1466
0
      *NotPrimaryExpression = true;
1467
171
    Res = ParseCXXUuidof();
1468
171
    break;
1469
195k
  case tok::kw_this:
1470
195k
    Res = ParseCXXThis();
1471
195k
    break;
1472
1473
278k
  case tok::annot_typename:
1474
278k
    if (isStartOfObjCClassMessageMissingOpenBracket()) {
1475
81
      TypeResult Type = getTypeAnnotation(Tok);
1476
1477
      // Fake up a Declarator to use with ActOnTypeName.
1478
81
      DeclSpec DS(AttrFactory);
1479
81
      DS.SetRangeStart(Tok.getLocation());
1480
81
      DS.SetRangeEnd(Tok.getLastLoc());
1481
1482
81
      const char *PrevSpec = nullptr;
1483
81
      unsigned DiagID;
1484
81
      DS.SetTypeSpecType(TST_typename, Tok.getAnnotationEndLoc(),
1485
81
                         PrevSpec, DiagID, Type,
1486
81
                         Actions.getASTContext().getPrintingPolicy());
1487
1488
81
      Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName);
1489
81
      TypeResult Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
1490
81
      if (Ty.isInvalid())
1491
0
        break;
1492
1493
81
      ConsumeAnnotationToken();
1494
81
      Res = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(),
1495
81
                                           Ty.get(), nullptr);
1496
81
      break;
1497
81
    }
1498
278k
    LLVM_FALLTHROUGH;
1499
1500
278k
  case tok::annot_decltype:
1501
278k
  case tok::kw_char:
1502
278k
  case tok::kw_wchar_t:
1503
278k
  case tok::kw_char8_t:
1504
278k
  case tok::kw_char16_t:
1505
278k
  case tok::kw_char32_t:
1506
282k
  case tok::kw_bool:
1507
282k
  case tok::kw_short:
1508
283k
  case tok::kw_int:
1509
283k
  case tok::kw_long:
1510
283k
  case tok::kw___int64:
1511
283k
  case tok::kw___int128:
1512
283k
  case tok::kw__ExtInt:
1513
283k
  case tok::kw_signed:
1514
283k
  case tok::kw_unsigned:
1515
283k
  case tok::kw_half:
1516
283k
  case tok::kw_float:
1517
283k
  case tok::kw_double:
1518
283k
  case tok::kw___bf16:
1519
283k
  case tok::kw__Float16:
1520
283k
  case tok::kw___float128:
1521
283k
  case tok::kw_void:
1522
306k
  case tok::kw_typename:
1523
306k
  case tok::kw_typeof:
1524
306k
  case tok::kw___vector:
1525
3.67M
#define GENERIC_IMAGE_TYPE(ImgType, Id) case tok::kw_##ImgType##_t:
1526
3.67M
#include 
"clang/Basic/OpenCLImageTypes.def"306k
1527
3.67M
  {
1528
306k
    if (!getLangOpts().CPlusPlus) {
1529
296
      Diag(Tok, diag::err_expected_expression);
1530
296
      return ExprError();
1531
296
    }
1532
1533
    // Everything henceforth is a postfix-expression.
1534
306k
    if (NotPrimaryExpression)
1535
2
      *NotPrimaryExpression = true;
1536
1537
306k
    if (SavedKind == tok::kw_typename) {
1538
      // postfix-expression: typename-specifier '(' expression-list[opt] ')'
1539
      //                     typename-specifier braced-init-list
1540
22.4k
      if (TryAnnotateTypeOrScopeToken())
1541
5
        return ExprError();
1542
1543
22.4k
      if (!Actions.isSimpleTypeSpecifier(Tok.getKind()))
1544
        // We are trying to parse a simple-type-specifier but might not get such
1545
        // a token after error recovery.
1546
0
        return ExprError();
1547
306k
    }
1548
1549
    // postfix-expression: simple-type-specifier '(' expression-list[opt] ')'
1550
    //                     simple-type-specifier braced-init-list
1551
    //
1552
306k
    DeclSpec DS(AttrFactory);
1553
1554
306k
    ParseCXXSimpleTypeSpecifier(DS);
1555
306k
    if (Tok.isNot(tok::l_paren) &&
1556
6.15k
        (!getLangOpts().CPlusPlus11 || 
Tok.isNot(tok::l_brace)6.15k
))
1557
37
      return ExprError(Diag(Tok, diag::err_expected_lparen_after_type)
1558
37
                         << DS.getSourceRange());
1559
1560
306k
    if (Tok.is(tok::l_brace))
1561
6.12k
      Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
1562
1563
306k
    Res = ParseCXXTypeConstructExpression(DS);
1564
306k
    break;
1565
306k
  }
1566
1567
1.05M
  case tok::annot_cxxscope: { // [C++] id-expression: qualified-id
1568
    // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse.
1569
    // (We can end up in this situation after tentative parsing.)
1570
1.05M
    if (TryAnnotateTypeOrScopeToken())
1571
0
      return ExprError();
1572
1.05M
    if (!Tok.is(tok::annot_cxxscope))
1573
4
      return ParseCastExpression(ParseKind, isAddressOfOperand, NotCastExpr,
1574
4
                                 isTypeCast, isVectorLiteral,
1575
4
                                 NotPrimaryExpression);
1576
1577
1.05M
    Token Next = NextToken();
1578
1.05M
    if (Next.is(tok::annot_template_id)) {
1579
157k
      TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Next);
1580
157k
      if (TemplateId->Kind == TNK_Type_template) {
1581
        // We have a qualified template-id that we know refers to a
1582
        // type, translate it into a type and continue parsing as a
1583
        // cast expression.
1584
0
        CXXScopeSpec SS;
1585
0
        ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
1586
0
                                       /*ObjectHadErrors=*/false,
1587
0
                                       /*EnteringContext=*/false);
1588
0
        AnnotateTemplateIdTokenAsType(SS);
1589
0
        return ParseCastExpression(ParseKind, isAddressOfOperand, NotCastExpr,
1590
0
                                   isTypeCast, isVectorLiteral,
1591
0
                                   NotPrimaryExpression);
1592
0
      }
1593
1.05M
    }
1594
1595
    // Parse as an id-expression.
1596
1.05M
    Res = ParseCXXIdExpression(isAddressOfOperand);
1597
1.05M
    break;
1598
1.05M
  }
1599
1600
67.6k
  case tok::annot_template_id: { // [C++]          template-id
1601
67.6k
    TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1602
67.6k
    if (TemplateId->Kind == TNK_Type_template) {
1603
      // We have a template-id that we know refers to a type,
1604
      // translate it into a type and continue parsing as a cast
1605
      // expression.
1606
49
      CXXScopeSpec SS;
1607
49
      AnnotateTemplateIdTokenAsType(SS);
1608
49
      return ParseCastExpression(ParseKind, isAddressOfOperand,
1609
49
                                 NotCastExpr, isTypeCast, isVectorLiteral,
1610
49
                                 NotPrimaryExpression);
1611
49
    }
1612
1613
    // Fall through to treat the template-id as an id-expression.
1614
67.6k
    LLVM_FALLTHROUGH;
1615
67.6k
  }
1616
1617
70.0k
  case tok::kw_operator: // [C++] id-expression: operator/conversion-function-id
1618
70.0k
    Res = ParseCXXIdExpression(isAddressOfOperand);
1619
70.0k
    break;
1620
1621
30.6k
  case tok::coloncolon: {
1622
    // ::foo::bar -> global qualified name etc.   If TryAnnotateTypeOrScopeToken
1623
    // annotates the token, tail recurse.
1624
30.6k
    if (TryAnnotateTypeOrScopeToken())
1625
4
      return ExprError();
1626
30.6k
    if (!Tok.is(tok::coloncolon))
1627
13.8k
      return ParseCastExpression(ParseKind, isAddressOfOperand, isTypeCast,
1628
13.8k
                                 isVectorLiteral, NotPrimaryExpression);
1629
1630
    // ::new -> [C++] new-expression
1631
    // ::delete -> [C++] delete-expression
1632
16.7k
    SourceLocation CCLoc = ConsumeToken();
1633
16.7k
    if (Tok.is(tok::kw_new)) {
1634
16.7k
      if (NotPrimaryExpression)
1635
0
        *NotPrimaryExpression = true;
1636
16.7k
      Res = ParseCXXNewExpression(true, CCLoc);
1637
16.7k
      AllowSuffix = false;
1638
16.7k
      break;
1639
16.7k
    }
1640
52
    if (Tok.is(tok::kw_delete)) {
1641
52
      if (NotPrimaryExpression)
1642
0
        *NotPrimaryExpression = true;
1643
52
      Res = ParseCXXDeleteExpression(true, CCLoc);
1644
52
      AllowSuffix = false;
1645
52
      break;
1646
52
    }
1647
1648
    // This is not a type name or scope specifier, it is an invalid expression.
1649
0
    Diag(CCLoc, diag::err_expected_expression);
1650
0
    return ExprError();
1651
0
  }
1652
1653
8.16k
  case tok::kw_new: // [C++] new-expression
1654
8.16k
    if (NotPrimaryExpression)
1655
0
      *NotPrimaryExpression = true;
1656
8.16k
    Res = ParseCXXNewExpression(false, Tok.getLocation());
1657
8.16k
    AllowSuffix = false;
1658
8.16k
    break;
1659
1660
3.82k
  case tok::kw_delete: // [C++] delete-expression
1661
3.82k
    if (NotPrimaryExpression)
1662
0
      *NotPrimaryExpression = true;
1663
3.82k
    Res = ParseCXXDeleteExpression(false, Tok.getLocation());
1664
3.82k
    AllowSuffix = false;
1665
3.82k
    break;
1666
1667
229
  case tok::kw_requires: // [C++2a] requires-expression
1668
229
    Res = ParseRequiresExpression();
1669
229
    AllowSuffix = false;
1670
229
    break;
1671
1672
11.9k
  case tok::kw_noexcept: { // [C++0x] 'noexcept' '(' expression ')'
1673
11.9k
    if (NotPrimaryExpression)
1674
0
      *NotPrimaryExpression = true;
1675
11.9k
    Diag(Tok, diag::warn_cxx98_compat_noexcept_expr);
1676
11.9k
    SourceLocation KeyLoc = ConsumeToken();
1677
11.9k
    BalancedDelimiterTracker T(*this, tok::l_paren);
1678
1679
11.9k
    if (T.expectAndConsume(diag::err_expected_lparen_after, "noexcept"))
1680
0
      return ExprError();
1681
    // C++11 [expr.unary.noexcept]p1:
1682
    //   The noexcept operator determines whether the evaluation of its operand,
1683
    //   which is an unevaluated operand, can throw an exception.
1684
11.9k
    EnterExpressionEvaluationContext Unevaluated(
1685
11.9k
        Actions, Sema::ExpressionEvaluationContext::Unevaluated);
1686
11.9k
    Res = ParseExpression();
1687
1688
11.9k
    T.consumeClose();
1689
1690
11.9k
    if (!Res.isInvalid())
1691
11.9k
      Res = Actions.ActOnNoexceptExpr(KeyLoc, T.getOpenLocation(), Res.get(),
1692
11.9k
                                      T.getCloseLocation());
1693
11.9k
    AllowSuffix = false;
1694
11.9k
    break;
1695
11.9k
  }
1696
1697
11.9k
#define TYPE_TRAIT(N,Spelling,K) \
1698
717k
  case tok::kw_##Spelling:
1699
27.0k
#include 
"clang/Basic/TokenKinds.def"11.9k
1700
27.0k
    Res = ParseTypeTrait();
1701
27.0k
    break;
1702
1703
10
  case tok::kw___array_rank:
1704
482
  case tok::kw___array_extent:
1705
482
    if (NotPrimaryExpression)
1706
0
      *NotPrimaryExpression = true;
1707
482
    Res = ParseArrayTypeTrait();
1708
482
    break;
1709
1710
224
  case tok::kw___is_lvalue_expr:
1711
439
  case tok::kw___is_rvalue_expr:
1712
439
    if (NotPrimaryExpression)
1713
0
      *NotPrimaryExpression = true;
1714
439
    Res = ParseExpressionTrait();
1715
439
    break;
1716
1717
8.49k
  case tok::at: {
1718
8.49k
    if (NotPrimaryExpression)
1719
0
      *NotPrimaryExpression = true;
1720
8.49k
    SourceLocation AtLoc = ConsumeToken();
1721
8.49k
    return ParseObjCAtExpression(AtLoc);
1722
224
  }
1723
2.86k
  case tok::caret:
1724
2.86k
    Res = ParseBlockLiteralExpression();
1725
2.86k
    break;
1726
92
  case tok::code_completion: {
1727
92
    Actions.CodeCompleteExpression(getCurScope(),
1728
92
                                   PreferredType.get(Tok.getLocation()));
1729
92
    cutOffParsing();
1730
92
    return ExprError();
1731
224
  }
1732
30.4k
  case tok::l_square:
1733
30.4k
    if (getLangOpts().CPlusPlus11) {
1734
9.97k
      if (getLangOpts().ObjC) {
1735
        // C++11 lambda expressions and Objective-C message sends both start with a
1736
        // square bracket.  There are three possibilities here:
1737
        // we have a valid lambda expression, we have an invalid lambda
1738
        // expression, or we have something that doesn't appear to be a lambda.
1739
        // If we're in the last case, we fall back to ParseObjCMessageExpression.
1740
2.93k
        Res = TryParseLambdaExpression();
1741
2.93k
        if (!Res.isInvalid() && 
!Res.get()2.91k
) {
1742
          // We assume Objective-C++ message expressions are not
1743
          // primary-expressions.
1744
2.72k
          if (NotPrimaryExpression)
1745
0
            *NotPrimaryExpression = true;
1746
2.72k
          Res = ParseObjCMessageExpression();
1747
2.72k
        }
1748
2.93k
        break;
1749
2.93k
      }
1750
7.04k
      Res = ParseLambdaExpression();
1751
7.04k
      break;
1752
7.04k
    }
1753
20.5k
    if (getLangOpts().ObjC) {
1754
20.4k
      Res = ParseObjCMessageExpression();
1755
20.4k
      break;
1756
20.4k
    }
1757
11
    LLVM_FALLTHROUGH;
1758
15.1k
  default:
1759
15.1k
    NotCastExpr = true;
1760
15.1k
    return ExprError();
1761
30.8M
  }
1762
1763
  // Check to see whether Res is a function designator only. If it is and we
1764
  // are compiling for OpenCL, we need to return an error as this implies
1765
  // that the address of the function is being taken, which is illegal in CL.
1766
1767
30.8M
  if (ParseKind == PrimaryExprOnly)
1768
    // This is strictly a primary-expression - no postfix-expr pieces should be
1769
    // parsed.
1770
437
    return Res;
1771
1772
30.8M
  if (!AllowSuffix) {
1773
    // FIXME: Don't parse a primary-expression suffix if we encountered a parse
1774
    // error already.
1775
172k
    if (Res.isInvalid())
1776
691
      return Res;
1777
1778
171k
    switch (Tok.getKind()) {
1779
5
    case tok::l_square:
1780
6
    case tok::l_paren:
1781
6
    case tok::plusplus:
1782
6
    case tok::minusminus:
1783
      // "expected ';'" or similar is probably the right diagnostic here. Let
1784
      // the caller decide what to do.
1785
6
      if (Tok.isAtStartOfLine())
1786
1
        return Res;
1787
1788
5
      LLVM_FALLTHROUGH;
1789
5
    case tok::period:
1790
7
    case tok::arrow:
1791
7
      break;
1792
1793
171k
    default:
1794
171k
      return Res;
1795
7
    }
1796
1797
    // This was a unary-expression for which a postfix-expression suffix is
1798
    // not permitted by the grammar (eg, a sizeof expression or
1799
    // new-expression or similar). Diagnose but parse the suffix anyway.
1800
7
    Diag(Tok.getLocation(), diag::err_postfix_after_unary_requires_parens)
1801
7
        << Tok.getKind() << Res.get()->getSourceRange()
1802
7
        << FixItHint::CreateInsertion(Res.get()->getBeginLoc(), "(")
1803
7
        << FixItHint::CreateInsertion(PP.getLocForEndOfToken(PrevTokLocation),
1804
7
                                      ")");
1805
7
  }
1806
1807
  // These can be followed by postfix-expr pieces.
1808
30.7M
  PreferredType = SavedType;
1809
30.7M
  Res = ParsePostfixExpressionSuffix(Res);
1810
30.7M
  if (getLangOpts().OpenCL)
1811
20.5k
    if (Expr *PostfixExpr = Res.get()) {
1812
20.5k
      QualType Ty = PostfixExpr->getType();
1813
20.5k
      if (!Ty.isNull() && 
Ty->isFunctionType()20.2k
) {
1814
14
        Diag(PostfixExpr->getExprLoc(),
1815
14
             diag::err_opencl_taking_function_address_parser);
1816
14
        return ExprError();
1817
14
      }
1818
30.7M
    }
1819
1820
30.7M
  return Res;
1821
30.7M
}
1822
1823
/// Once the leading part of a postfix-expression is parsed, this
1824
/// method parses any suffixes that apply.
1825
///
1826
/// \verbatim
1827
///       postfix-expression: [C99 6.5.2]
1828
///         primary-expression
1829
///         postfix-expression '[' expression ']'
1830
///         postfix-expression '[' braced-init-list ']'
1831
///         postfix-expression '(' argument-expression-list[opt] ')'
1832
///         postfix-expression '.' identifier
1833
///         postfix-expression '->' identifier
1834
///         postfix-expression '++'
1835
///         postfix-expression '--'
1836
///         '(' type-name ')' '{' initializer-list '}'
1837
///         '(' type-name ')' '{' initializer-list ',' '}'
1838
///
1839
///       argument-expression-list: [C99 6.5.2]
1840
///         argument-expression ...[opt]
1841
///         argument-expression-list ',' assignment-expression ...[opt]
1842
/// \endverbatim
1843
ExprResult
1844
30.7M
Parser::ParsePostfixExpressionSuffix(ExprResult LHS) {
1845
  // Now that the primary-expression piece of the postfix-expression has been
1846
  // parsed, see if there are any postfix-expression pieces here.
1847
30.7M
  SourceLocation Loc;
1848
30.7M
  auto SavedType = PreferredType;
1849
36.7M
  while (1) {
1850
    // Each iteration relies on preferred type for the whole expression.
1851
36.7M
    PreferredType = SavedType;
1852
36.7M
    switch (Tok.getKind()) {
1853
67
    case tok::code_completion:
1854
67
      if (InMessageExpression)
1855
57
        return LHS;
1856
1857
10
      Actions.CodeCompletePostfixExpression(
1858
10
          getCurScope(), LHS, PreferredType.get(Tok.getLocation()));
1859
10
      cutOffParsing();
1860
10
      return ExprError();
1861
1862
21.1k
    case tok::identifier:
1863
      // If we see identifier: after an expression, and we're not already in a
1864
      // message send, then this is probably a message send with a missing
1865
      // opening bracket '['.
1866
21.1k
      if (getLangOpts().ObjC && 
!InMessageExpression19.5k
&&
1867
283
          (NextToken().is(tok::colon) || 
NextToken().is(tok::r_square)197
)) {
1868
173
        LHS = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(),
1869
173
                                             nullptr, LHS.get());
1870
173
        break;
1871
173
      }
1872
      // Fall through; this isn't a message send.
1873
20.9k
      LLVM_FALLTHROUGH;
1874
1875
30.7M
    default:  // Not a postfix-expression suffix.
1876
30.7M
      return LHS;
1877
262k
    case tok::l_square: {  // postfix-expression: p-e '[' expression ']'
1878
      // If we have a array postfix expression that starts on a new line and
1879
      // Objective-C is enabled, it is highly likely that the user forgot a
1880
      // semicolon after the base expression and that the array postfix-expr is
1881
      // actually another message send.  In this case, do some look-ahead to see
1882
      // if the contents of the square brackets are obviously not a valid
1883
      // expression and recover by pretending there is no suffix.
1884
262k
      if (getLangOpts().ObjC && 
Tok.isAtStartOfLine()39.5k
&&
1885
5
          isSimpleObjCMessageExpression())
1886
4
        return LHS;
1887
1888
      // Reject array indices starting with a lambda-expression. '[[' is
1889
      // reserved for attributes.
1890
262k
      if (CheckProhibitedCXX11Attribute()) {
1891
2
        (void)Actions.CorrectDelayedTyposInExpr(LHS);
1892
2
        return ExprError();
1893
2
      }
1894
1895
262k
      BalancedDelimiterTracker T(*this, tok::l_square);
1896
262k
      T.consumeOpen();
1897
262k
      Loc = T.getOpenLocation();
1898
262k
      ExprResult Idx, Length, Stride;
1899
262k
      SourceLocation ColonLocFirst, ColonLocSecond;
1900
262k
      PreferredType.enterSubscript(Actions, Tok.getLocation(), LHS.get());
1901
262k
      if (getLangOpts().CPlusPlus11 && 
Tok.is(tok::l_brace)156k
) {
1902
4
        Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
1903
4
        Idx = ParseBraceInitializer();
1904
262k
      } else if (getLangOpts().OpenMP) {
1905
101k
        ColonProtectionRAIIObject RAII(*this);
1906
        // Parse [: or [ expr or [ expr :
1907
101k
        if (!Tok.is(tok::colon)) {
1908
          // [ expr
1909
95.4k
          Idx = ParseExpression();
1910
95.4k
        }
1911
101k
        if (Tok.is(tok::colon)) {
1912
          // Consume ':'
1913
10.1k
          ColonLocFirst = ConsumeToken();
1914
10.1k
          if (Tok.isNot(tok::r_square) &&
1915
7.83k
              (getLangOpts().OpenMP < 50 ||
1916
5.59k
               ((Tok.isNot(tok::colon) && 
getLangOpts().OpenMP >= 505.57k
))))
1917
7.82k
            Length = ParseExpression();
1918
10.1k
        }
1919
101k
        if (getLangOpts().OpenMP >= 50 &&
1920
81.5k
            (OMPClauseKind == llvm::omp::Clause::OMPC_to ||
1921
80.7k
             OMPClauseKind == llvm::omp::Clause::OMPC_from) &&
1922
1.48k
            Tok.is(tok::colon)) {
1923
          // Consume ':'
1924
208
          ColonLocSecond = ConsumeToken();
1925
208
          if (Tok.isNot(tok::r_square)) {
1926
160
            Stride = ParseExpression();
1927
160
          }
1928
208
        }
1929
101k
      } else
1930
161k
        Idx = ParseExpression();
1931
1932
262k
      SourceLocation RLoc = Tok.getLocation();
1933
1934
262k
      LHS = Actions.CorrectDelayedTyposInExpr(LHS);
1935
262k
      Idx = Actions.CorrectDelayedTyposInExpr(Idx);
1936
262k
      Length = Actions.CorrectDelayedTyposInExpr(Length);
1937
262k
      if (!LHS.isInvalid() && 
!Idx.isInvalid()262k
&&
!Length.isInvalid()262k
&&
1938
262k
          !Stride.isInvalid() && Tok.is(tok::r_square)) {
1939
261k
        if (ColonLocFirst.isValid() || 
ColonLocSecond.isValid()252k
) {
1940
9.78k
          LHS = Actions.ActOnOMPArraySectionExpr(
1941
9.78k
              LHS.get(), Loc, Idx.get(), ColonLocFirst, ColonLocSecond,
1942
9.78k
              Length.get(), Stride.get(), RLoc);
1943
252k
        } else {
1944
252k
          LHS = Actions.ActOnArraySubscriptExpr(getCurScope(), LHS.get(), Loc,
1945
252k
                                                Idx.get(), RLoc);
1946
252k
        }
1947
789
      } else {
1948
789
        LHS = ExprError();
1949
789
        Idx = ExprError();
1950
789
      }
1951
1952
      // Match the ']'.
1953
262k
      T.consumeClose();
1954
262k
      break;
1955
262k
    }
1956
1957
4.50M
    case tok::l_paren:         // p-e: p-e '(' argument-expression-list[opt] ')'
1958
4.50M
    case tok::lesslessless: {  // p-e: p-e '<<<' argument-expression-list '>>>'
1959
                               //   '(' argument-expression-list[opt] ')'
1960
4.50M
      tok::TokenKind OpKind = Tok.getKind();
1961
4.50M
      InMessageExpressionRAIIObject InMessage(*this, false);
1962
1963
4.50M
      Expr *ExecConfig = nullptr;
1964
1965
4.50M
      BalancedDelimiterTracker PT(*this, tok::l_paren);
1966
1967
4.50M
      if (OpKind == tok::lesslessless) {
1968
124
        ExprVector ExecConfigExprs;
1969
124
        CommaLocsTy ExecConfigCommaLocs;
1970
124
        SourceLocation OpenLoc = ConsumeToken();
1971
1972
124
        if (ParseSimpleExpressionList(ExecConfigExprs, ExecConfigCommaLocs)) {
1973
1
          (void)Actions.CorrectDelayedTyposInExpr(LHS);
1974
1
          LHS = ExprError();
1975
1
        }
1976
1977
124
        SourceLocation CloseLoc;
1978
124
        if (TryConsumeToken(tok::greatergreatergreater, CloseLoc)) {
1979
1
        } else if (LHS.isInvalid()) {
1980
0
          SkipUntil(tok::greatergreatergreater, StopAtSemi);
1981
1
        } else {
1982
          // There was an error closing the brackets
1983
1
          Diag(Tok, diag::err_expected) << tok::greatergreatergreater;
1984
1
          Diag(OpenLoc, diag::note_matching) << tok::lesslessless;
1985
1
          SkipUntil(tok::greatergreatergreater, StopAtSemi);
1986
1
          LHS = ExprError();
1987
1
        }
1988
1989
124
        if (!LHS.isInvalid()) {
1990
114
          if (ExpectAndConsume(tok::l_paren))
1991
1
            LHS = ExprError();
1992
113
          else
1993
113
            Loc = PrevTokLocation;
1994
114
        }
1995
1996
124
        if (!LHS.isInvalid()) {
1997
113
          ExprResult ECResult = Actions.ActOnCUDAExecConfigExpr(getCurScope(),
1998
113
                                    OpenLoc,
1999
113
                                    ExecConfigExprs,
2000
113
                                    CloseLoc);
2001
113
          if (ECResult.isInvalid())
2002
2
            LHS = ExprError();
2003
111
          else
2004
111
            ExecConfig = ECResult.get();
2005
113
        }
2006
4.50M
      } else {
2007
4.50M
        PT.consumeOpen();
2008
4.50M
        Loc = PT.getOpenLocation();
2009
4.50M
      }
2010
2011
4.50M
      ExprVector ArgExprs;
2012
4.50M
      CommaLocsTy CommaLocs;
2013
174
      auto RunSignatureHelp = [&]() -> QualType {
2014
174
        QualType PreferredType = Actions.ProduceCallSignatureHelp(
2015
174
            getCurScope(), LHS.get(), ArgExprs, PT.getOpenLocation());
2016
174
        CalledSignatureHelp = true;
2017
174
        return PreferredType;
2018
174
      };
2019
4.50M
      if (OpKind == tok::l_paren || 
!LHS.isInvalid()124
) {
2020
4.50M
        if (Tok.isNot(tok::r_paren)) {
2021
8.25M
          if (
ParseExpressionList(ArgExprs, CommaLocs, [&] 3.40M
{
2022
8.25M
                PreferredType.enterFunctionArgument(Tok.getLocation(),
2023
8.25M
                                                    RunSignatureHelp);
2024
4.64k
              })) {
2025
4.64k
            (void)Actions.CorrectDelayedTyposInExpr(LHS);
2026
            // If we got an error when parsing expression list, we don't call
2027
            // the CodeCompleteCall handler inside the parser. So call it here
2028
            // to make sure we get overload suggestions even when we are in the
2029
            // middle of a parameter.
2030
4.64k
            if (PP.isCodeCompletionReached() && 
!CalledSignatureHelp174
)
2031
6
              RunSignatureHelp();
2032
4.64k
            LHS = ExprError();
2033
3.40M
          } else if (LHS.isInvalid()) {
2034
103
            for (auto &E : ArgExprs)
2035
133
              Actions.CorrectDelayedTyposInExpr(E);
2036
103
          }
2037
3.40M
        }
2038
4.50M
      }
2039
2040
      // Match the ')'.
2041
4.50M
      if (LHS.isInvalid()) {
2042
4.93k
        SkipUntil(tok::r_paren, StopAtSemi);
2043
4.50M
      } else if (Tok.isNot(tok::r_paren)) {
2044
1.14k
        bool HadDelayedTypo = false;
2045
1.14k
        if (Actions.CorrectDelayedTyposInExpr(LHS).get() != LHS.get())
2046
0
          HadDelayedTypo = true;
2047
1.14k
        for (auto &E : ArgExprs)
2048
1.14k
          if (Actions.CorrectDelayedTyposInExpr(E).get() != E)
2049
11
            HadDelayedTypo = true;
2050
        // If there were delayed typos in the LHS or ArgExprs, call SkipUntil
2051
        // instead of PT.consumeClose() to avoid emitting extra diagnostics for
2052
        // the unmatched l_paren.
2053
1.14k
        if (HadDelayedTypo)
2054
11
          SkipUntil(tok::r_paren, StopAtSemi);
2055
1.13k
        else
2056
1.13k
          PT.consumeClose();
2057
1.14k
        LHS = ExprError();
2058
4.50M
      } else {
2059
4.50M
        assert(
2060
4.50M
            (ArgExprs.size() == 0 || ArgExprs.size() - 1 == CommaLocs.size()) &&
2061
4.50M
            "Unexpected number of commas!");
2062
4.50M
        Expr *Fn = LHS.get();
2063
4.50M
        SourceLocation RParLoc = Tok.getLocation();
2064
4.50M
        LHS = Actions.ActOnCallExpr(getCurScope(), Fn, Loc, ArgExprs, RParLoc,
2065
4.50M
                                    ExecConfig);
2066
4.50M
        if (LHS.isInvalid()) {
2067
4.73k
          ArgExprs.insert(ArgExprs.begin(), Fn);
2068
4.73k
          LHS =
2069
4.73k
              Actions.CreateRecoveryExpr(Fn->getBeginLoc(), RParLoc, ArgExprs);
2070
4.73k
        }
2071
4.50M
        PT.consumeClose();
2072
4.50M
      }
2073
2074
4.50M
      break;
2075
4.50M
    }
2076
299k
    case tok::arrow:
2077
1.15M
    case tok::period: {
2078
      // postfix-expression: p-e '->' template[opt] id-expression
2079
      // postfix-expression: p-e '.' template[opt] id-expression
2080
1.15M
      tok::TokenKind OpKind = Tok.getKind();
2081
1.15M
      SourceLocation OpLoc = ConsumeToken();  // Eat the "." or "->" token.
2082
2083
1.15M
      CXXScopeSpec SS;
2084
1.15M
      ParsedType ObjectType;
2085
1.15M
      bool MayBePseudoDestructor = false;
2086
1.15M
      Expr* OrigLHS = !LHS.isInvalid() ? LHS.get() : 
nullptr316
;
2087
2088
1.15M
      PreferredType.enterMemAccess(Actions, Tok.getLocation(), OrigLHS);
2089
2090
1.15M
      if (getLangOpts().CPlusPlus && 
!LHS.isInvalid()1.02M
) {
2091
1.02M
        Expr *Base = OrigLHS;
2092
1.02M
        const Type* BaseType = Base->getType().getTypePtrOrNull();
2093
1.02M
        if (BaseType && 
Tok.is(tok::l_paren)1.02M
&&
2094
13
            (BaseType->isFunctionType() ||
2095
10
             
BaseType->isSpecificPlaceholderType(BuiltinType::BoundMember)8
)) {
2096
10
          Diag(OpLoc, diag::err_function_is_not_record)
2097
10
              << OpKind << Base->getSourceRange()
2098
10
              << FixItHint::CreateRemoval(OpLoc);
2099
10
          return ParsePostfixExpressionSuffix(Base);
2100
10
        }
2101
2102
1.02M
        LHS = Actions.ActOnStartCXXMemberReference(getCurScope(), Base, OpLoc,
2103
1.02M
                                                   OpKind, ObjectType,
2104
1.02M
                                                   MayBePseudoDestructor);
2105
1.02M
        if (LHS.isInvalid()) {
2106
          // Clang will try to perform expression based completion as a
2107
          // fallback, which is confusing in case of member references. So we
2108
          // stop here without any completions.
2109
157
          if (Tok.is(tok::code_completion)) {
2110
1
            cutOffParsing();
2111
1
            return ExprError();
2112
1
          }
2113
156
          break;
2114
156
        }
2115
1.02M
        ParseOptionalCXXScopeSpecifier(
2116
1.02M
            SS, ObjectType, LHS.get() && LHS.get()->containsErrors(),
2117
1.02M
            /*EnteringContext=*/false, &MayBePseudoDestructor);
2118
1.02M
        if (SS.isNotEmpty())
2119
701
          ObjectType = nullptr;
2120
1.02M
      }
2121
2122
1.15M
      if (Tok.is(tok::code_completion)) {
2123
155
        tok::TokenKind CorrectedOpKind =
2124
114
            OpKind == tok::arrow ? 
tok::period41
: tok::arrow;
2125
155
        ExprResult CorrectedLHS(/*Invalid=*/true);
2126
155
        if (getLangOpts().CPlusPlus && 
OrigLHS108
) {
2127
          // FIXME: Creating a TentativeAnalysisScope from outside Sema is a
2128
          // hack.
2129
107
          Sema::TentativeAnalysisScope Trap(Actions);
2130
107
          CorrectedLHS = Actions.ActOnStartCXXMemberReference(
2131
107
              getCurScope(), OrigLHS, OpLoc, CorrectedOpKind, ObjectType,
2132
107
              MayBePseudoDestructor);
2133
107
        }
2134
2135
155
        Expr *Base = LHS.get();
2136
155
        Expr *CorrectedBase = CorrectedLHS.get();
2137
155
        if (!CorrectedBase && 
!getLangOpts().CPlusPlus48
)
2138
47
          CorrectedBase = Base;
2139
2140
        // Code completion for a member access expression.
2141
155
        Actions.CodeCompleteMemberReferenceExpr(
2142
155
            getCurScope(), Base, CorrectedBase, OpLoc, OpKind == tok::arrow,
2143
155
            Base && 
ExprStatementTokLoc == Base->getBeginLoc()154
,
2144
155
            PreferredType.get(Tok.getLocation()));
2145
2146
155
        cutOffParsing();
2147
155
        return ExprError();
2148
155
      }
2149
2150
1.15M
      if (MayBePseudoDestructor && 
!LHS.isInvalid()7.41k
) {
2151
7.41k
        LHS = ParseCXXPseudoDestructor(LHS.get(), OpLoc, OpKind, SS,
2152
7.41k
                                       ObjectType);
2153
7.41k
        break;
2154
7.41k
      }
2155
2156
      // Either the action has told us that this cannot be a
2157
      // pseudo-destructor expression (based on the type of base
2158
      // expression), or we didn't see a '~' in the right place. We
2159
      // can still parse a destructor name here, but in that case it
2160
      // names a real destructor.
2161
      // Allow explicit constructor calls in Microsoft mode.
2162
      // FIXME: Add support for explicit call of template constructor.
2163
1.14M
      SourceLocation TemplateKWLoc;
2164
1.14M
      UnqualifiedId Name;
2165
1.14M
      if (getLangOpts().ObjC && 
OpKind == tok::period166k
&&
2166
96.6k
          Tok.is(tok::kw_class)) {
2167
        // Objective-C++:
2168
        //   After a '.' in a member access expression, treat the keyword
2169
        //   'class' as if it were an identifier.
2170
        //
2171
        // This hack allows property access to the 'class' method because it is
2172
        // such a common method name. For other C++ keywords that are
2173
        // Objective-C method names, one must use the message send syntax.
2174
2
        IdentifierInfo *Id = Tok.getIdentifierInfo();
2175
2
        SourceLocation Loc = ConsumeToken();
2176
2
        Name.setIdentifier(Id, Loc);
2177
1.14M
      } else if (ParseUnqualifiedId(
2178
1.14M
                     SS, ObjectType, LHS.get() && 
LHS.get()->containsErrors()1.14M
,
2179
1.14M
                     /*EnteringContext=*/false,
2180
1.14M
                     /*AllowDestructorName=*/true,
2181
                     /*AllowConstructorName=*/
2182
1.14M
                     getLangOpts().MicrosoftExt && 
SS.isNotEmpty()3.23k
,
2183
316
                     /*AllowDeductionGuide=*/false, &TemplateKWLoc, Name)) {
2184
316
        (void)Actions.CorrectDelayedTyposInExpr(LHS);
2185
316
        LHS = ExprError();
2186
316
      }
2187
2188
1.14M
      if (!LHS.isInvalid())
2189
1.14M
        LHS = Actions.ActOnMemberAccessExpr(getCurScope(), LHS.get(), OpLoc,
2190
1.14M
                                            OpKind, SS, TemplateKWLoc, Name,
2191
2.23k
                                 CurParsedObjCImpl ? CurParsedObjCImpl->Dcl
2192
1.14M
                                                   : nullptr);
2193
1.14M
      if (!LHS.isInvalid()) {
2194
1.14M
        if (Tok.is(tok::less))
2195
3.15k
          checkPotentialAngleBracket(LHS);
2196
996
      } else if (OrigLHS && 
Name.isValid()681
) {
2197
        // Preserve the LHS if the RHS is an invalid member.
2198
376
        LHS = Actions.CreateRecoveryExpr(OrigLHS->getBeginLoc(),
2199
376
                                         Name.getEndLoc(), {OrigLHS});
2200
376
      }
2201
1.14M
      break;
2202
1.14M
    }
2203
40.7k
    case tok::plusplus:    // postfix-expression: postfix-expression '++'
2204
42.1k
    case tok::minusminus:  // postfix-expression: postfix-expression '--'
2205
42.1k
      if (!LHS.isInvalid()) {
2206
42.1k
        Expr *Arg = LHS.get();
2207
42.1k
        LHS = Actions.ActOnPostfixUnaryOp(getCurScope(), Tok.getLocation(),
2208
42.1k
                                          Tok.getKind(), Arg);
2209
42.1k
        if (LHS.isInvalid())
2210
82
          LHS = Actions.CreateRecoveryExpr(Arg->getBeginLoc(),
2211
82
                                           Tok.getLocation(), Arg);
2212
42.1k
      }
2213
42.1k
      ConsumeToken();
2214
42.1k
      break;
2215
36.7M
    }
2216
36.7M
  }
2217
30.7M
}
2218
2219
/// ParseExprAfterUnaryExprOrTypeTrait - We parsed a typeof/sizeof/alignof/
2220
/// vec_step and we are at the start of an expression or a parenthesized
2221
/// type-id. OpTok is the operand token (typeof/sizeof/alignof). Returns the
2222
/// expression (isCastExpr == false) or the type (isCastExpr == true).
2223
///
2224
/// \verbatim
2225
///       unary-expression:  [C99 6.5.3]
2226
///         'sizeof' unary-expression
2227
///         'sizeof' '(' type-name ')'
2228
/// [GNU]   '__alignof' unary-expression
2229
/// [GNU]   '__alignof' '(' type-name ')'
2230
/// [C11]   '_Alignof' '(' type-name ')'
2231
/// [C++0x] 'alignof' '(' type-id ')'
2232
///
2233
/// [GNU]   typeof-specifier:
2234
///           typeof ( expressions )
2235
///           typeof ( type-name )
2236
/// [GNU/C++] typeof unary-expression
2237
///
2238
/// [OpenCL 1.1 6.11.12] vec_step built-in function:
2239
///           vec_step ( expressions )
2240
///           vec_step ( type-name )
2241
/// \endverbatim
2242
ExprResult
2243
Parser::ParseExprAfterUnaryExprOrTypeTrait(const Token &OpTok,
2244
                                           bool &isCastExpr,
2245
                                           ParsedType &CastTy,
2246
87.8k
                                           SourceRange &CastRange) {
2247
2248
87.8k
  assert(OpTok.isOneOf(tok::kw_typeof, tok::kw_sizeof, tok::kw___alignof,
2249
87.8k
                       tok::kw_alignof, tok::kw__Alignof, tok::kw_vec_step,
2250
87.8k
                       tok::kw___builtin_omp_required_simd_align) &&
2251
87.8k
         "Not a typeof/sizeof/alignof/vec_step expression!");
2252
2253
87.8k
  ExprResult Operand;
2254
2255
  // If the operand doesn't start with an '(', it must be an expression.
2256
87.8k
  if (Tok.isNot(tok::l_paren)) {
2257
    // If construct allows a form without parenthesis, user may forget to put
2258
    // pathenthesis around type name.
2259
876
    if (OpTok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof,
2260
870
                      tok::kw__Alignof)) {
2261
870
      if (isTypeIdUnambiguously()) {
2262
9
        DeclSpec DS(AttrFactory);
2263
9
        ParseSpecifierQualifierList(DS);
2264
9
        Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName);
2265
9
        ParseDeclarator(DeclaratorInfo);
2266
2267
9
        SourceLocation LParenLoc = PP.getLocForEndOfToken(OpTok.getLocation());
2268
9
        SourceLocation RParenLoc = PP.getLocForEndOfToken(PrevTokLocation);
2269
9
        if (LParenLoc.isInvalid() || 
RParenLoc.isInvalid()8
) {
2270
1
          Diag(OpTok.getLocation(),
2271
1
               diag::err_expected_parentheses_around_typename)
2272
1
              << OpTok.getName();
2273
8
        } else {
2274
8
          Diag(LParenLoc, diag::err_expected_parentheses_around_typename)
2275
8
              << OpTok.getName() << FixItHint::CreateInsertion(LParenLoc, "(")
2276
8
              << FixItHint::CreateInsertion(RParenLoc, ")");
2277
8
        }
2278
9
        isCastExpr = true;
2279
9
        return ExprEmpty();
2280
9
      }
2281
867
    }
2282
2283
867
    isCastExpr = false;
2284
867
    if (OpTok.is(tok::kw_typeof) && 
!getLangOpts().CPlusPlus6
) {
2285
0
      Diag(Tok, diag::err_expected_after) << OpTok.getIdentifierInfo()
2286
0
                                          << tok::l_paren;
2287
0
      return ExprError();
2288
0
    }
2289
2290
867
    Operand = ParseCastExpression(UnaryExprOnly);
2291
86.9k
  } else {
2292
    // If it starts with a '(', we know that it is either a parenthesized
2293
    // type-name, or it is a unary-expression that starts with a compound
2294
    // literal, or starts with a primary-expression that is a parenthesized
2295
    // expression.
2296
86.9k
    ParenParseOption ExprType = CastExpr;
2297
86.9k
    SourceLocation LParenLoc = Tok.getLocation(), RParenLoc;
2298
2299
86.9k
    Operand = ParseParenExpression(ExprType, true/*stopIfCastExpr*/,
2300
86.9k
                                   false, CastTy, RParenLoc);
2301
86.9k
    CastRange = SourceRange(LParenLoc, RParenLoc);
2302
2303
    // If ParseParenExpression parsed a '(typename)' sequence only, then this is
2304
    // a type.
2305
86.9k
    if (ExprType == CastExpr) {
2306
71.2k
      isCastExpr = true;
2307
71.2k
      return ExprEmpty();
2308
71.2k
    }
2309
2310
15.6k
    if (getLangOpts().CPlusPlus || 
OpTok.isNot(tok::kw_typeof)1.95k
) {
2311
      // GNU typeof in C requires the expression to be parenthesized. Not so for
2312
      // sizeof/alignof or in C++. Therefore, the parenthesized expression is
2313
      // the start of a unary-expression, but doesn't include any postfix
2314
      // pieces. Parse these now if present.
2315
14.7k
      if (!Operand.isInvalid())
2316
14.7k
        Operand = ParsePostfixExpressionSuffix(Operand.get());
2317
14.7k
    }
2318
15.6k
  }
2319
2320
  // If we get here, the operand to the typeof/sizeof/alignof was an expression.
2321
16.4k
  isCastExpr = false;
2322
16.4k
  return Operand;
2323
87.8k
}
2324
2325
2326
/// Parse a sizeof or alignof expression.
2327
///
2328
/// \verbatim
2329
///       unary-expression:  [C99 6.5.3]
2330
///         'sizeof' unary-expression
2331
///         'sizeof' '(' type-name ')'
2332
/// [C++11] 'sizeof' '...' '(' identifier ')'
2333
/// [GNU]   '__alignof' unary-expression
2334
/// [GNU]   '__alignof' '(' type-name ')'
2335
/// [C11]   '_Alignof' '(' type-name ')'
2336
/// [C++11] 'alignof' '(' type-id ')'
2337
/// \endverbatim
2338
131k
ExprResult Parser::ParseUnaryExprOrTypeTraitExpression() {
2339
131k
  assert(Tok.isOneOf(tok::kw_sizeof, tok::kw___alignof, tok::kw_alignof,
2340
131k
                     tok::kw__Alignof, tok::kw_vec_step,
2341
131k
                     tok::kw___builtin_omp_required_simd_align) &&
2342
131k
         "Not a sizeof/alignof/vec_step expression!");
2343
131k
  Token OpTok = Tok;
2344
131k
  ConsumeToken();
2345
2346
  // [C++11] 'sizeof' '...' '(' identifier ')'
2347
131k
  if (Tok.is(tok::ellipsis) && 
OpTok.is(tok::kw_sizeof)46.3k
) {
2348
46.3k
    SourceLocation EllipsisLoc = ConsumeToken();
2349
46.3k
    SourceLocation LParenLoc, RParenLoc;
2350
46.3k
    IdentifierInfo *Name = nullptr;
2351
46.3k
    SourceLocation NameLoc;
2352
46.3k
    if (Tok.is(tok::l_paren)) {
2353
46.3k
      BalancedDelimiterTracker T(*this, tok::l_paren);
2354
46.3k
      T.consumeOpen();
2355
46.3k
      LParenLoc = T.getOpenLocation();
2356
46.3k
      if (Tok.is(tok::identifier)) {
2357
46.3k
        Name = Tok.getIdentifierInfo();
2358
46.3k
        NameLoc = ConsumeToken();
2359
46.3k
        T.consumeClose();
2360
46.3k
        RParenLoc = T.getCloseLocation();
2361
46.3k
        if (RParenLoc.isInvalid())
2362
0
          RParenLoc = PP.getLocForEndOfToken(NameLoc);
2363
0
      } else {
2364
0
        Diag(Tok, diag::err_expected_parameter_pack);
2365
0
        SkipUntil(tok::r_paren, StopAtSemi);
2366
0
      }
2367
1
    } else if (Tok.is(tok::identifier)) {
2368
1
      Name = Tok.getIdentifierInfo();
2369
1
      NameLoc = ConsumeToken();
2370
1
      LParenLoc = PP.getLocForEndOfToken(EllipsisLoc);
2371
1
      RParenLoc = PP.getLocForEndOfToken(NameLoc);
2372
1
      Diag(LParenLoc, diag::err_paren_sizeof_parameter_pack)
2373
1
        << Name
2374
1
        << FixItHint::CreateInsertion(LParenLoc, "(")
2375
1
        << FixItHint::CreateInsertion(RParenLoc, ")");
2376
0
    } else {
2377
0
      Diag(Tok, diag::err_sizeof_parameter_pack);
2378
0
    }
2379
2380
46.3k
    if (!Name)
2381
0
      return ExprError();
2382
2383
46.3k
    EnterExpressionEvaluationContext Unevaluated(
2384
46.3k
        Actions, Sema::ExpressionEvaluationContext::Unevaluated,
2385
46.3k
        Sema::ReuseLambdaContextDecl);
2386
2387
46.3k
    return Actions.ActOnSizeofParameterPackExpr(getCurScope(),
2388
46.3k
                                                OpTok.getLocation(),
2389
46.3k
                                                *Name, NameLoc,
2390
46.3k
                                                RParenLoc);
2391
46.3k
  }
2392
2393
84.8k
  if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof))
2394
6.00k
    Diag(OpTok, diag::warn_cxx98_compat_alignof);
2395
2396
84.8k
  EnterExpressionEvaluationContext Unevaluated(
2397
84.8k
      Actions, Sema::ExpressionEvaluationContext::Unevaluated,
2398
84.8k
      Sema::ReuseLambdaContextDecl);
2399
2400
84.8k
  bool isCastExpr;
2401
84.8k
  ParsedType CastTy;
2402
84.8k
  SourceRange CastRange;
2403
84.8k
  ExprResult Operand = ParseExprAfterUnaryExprOrTypeTrait(OpTok,
2404
84.8k
                                                          isCastExpr,
2405
84.8k
                                                          CastTy,
2406
84.8k
                                                          CastRange);
2407
2408
84.8k
  UnaryExprOrTypeTrait ExprKind = UETT_SizeOf;
2409
84.8k
  if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof))
2410
6.00k
    ExprKind = UETT_AlignOf;
2411
78.7k
  else if (OpTok.is(tok::kw___alignof))
2412
2.58k
    ExprKind = UETT_PreferredAlignOf;
2413
76.2k
  else if (OpTok.is(tok::kw_vec_step))
2414
45
    ExprKind = UETT_VecStep;
2415
76.1k
  else if (OpTok.is(tok::kw___builtin_omp_required_simd_align))
2416
29
    ExprKind = UETT_OpenMPRequiredSimdAlign;
2417
2418
84.8k
  if (isCastExpr)
2419
71.2k
    return Actions.ActOnUnaryExprOrTypeTraitExpr(OpTok.getLocation(),
2420
71.2k
                                                 ExprKind,
2421
71.2k
                                                 /*IsType=*/true,
2422
71.2k
                                                 CastTy.getAsOpaquePtr(),
2423
71.2k
                                                 CastRange);
2424
2425
13.5k
  if (OpTok.isOneOf(tok::kw_alignof, tok::kw__Alignof))
2426
37
    Diag(OpTok, diag::ext_alignof_expr) << OpTok.getIdentifierInfo();
2427
2428
  // If we get here, the operand to the sizeof/alignof was an expression.
2429
13.5k
  if (!Operand.isInvalid())
2430
13.5k
    Operand = Actions.ActOnUnaryExprOrTypeTraitExpr(OpTok.getLocation(),
2431
13.5k
                                                    ExprKind,
2432
13.5k
                                                    /*IsType=*/false,
2433
13.5k
                                                    Operand.get(),
2434
13.5k
                                                    CastRange);
2435
13.5k
  return Operand;
2436
13.5k
}
2437
2438
/// ParseBuiltinPrimaryExpression
2439
///
2440
/// \verbatim
2441
///       primary-expression: [C99 6.5.1]
2442
/// [GNU]   '__builtin_va_arg' '(' assignment-expression ',' type-name ')'
2443
/// [GNU]   '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')'
2444
/// [GNU]   '__builtin_choose_expr' '(' assign-expr ',' assign-expr ','
2445
///                                     assign-expr ')'
2446
/// [GNU]   '__builtin_types_compatible_p' '(' type-name ',' type-name ')'
2447
/// [GNU]   '__builtin_FILE' '(' ')'
2448
/// [GNU]   '__builtin_FUNCTION' '(' ')'
2449
/// [GNU]   '__builtin_LINE' '(' ')'
2450
/// [CLANG] '__builtin_COLUMN' '(' ')'
2451
/// [OCL]   '__builtin_astype' '(' assignment-expression ',' type-name ')'
2452
///
2453
/// [GNU] offsetof-member-designator:
2454
/// [GNU]   identifier
2455
/// [GNU]   offsetof-member-designator '.' identifier
2456
/// [GNU]   offsetof-member-designator '[' expression ']'
2457
/// \endverbatim
2458
21.1k
ExprResult Parser::ParseBuiltinPrimaryExpression() {
2459
21.1k
  ExprResult Res;
2460
21.1k
  const IdentifierInfo *BuiltinII = Tok.getIdentifierInfo();
2461
2462
21.1k
  tok::TokenKind T = Tok.getKind();
2463
21.1k
  SourceLocation StartLoc = ConsumeToken();   // Eat the builtin identifier.
2464
2465
  // All of these start with an open paren.
2466
21.1k
  if (Tok.isNot(tok::l_paren))
2467
0
    return ExprError(Diag(Tok, diag::err_expected_after) << BuiltinII
2468
0
                                                         << tok::l_paren);
2469
2470
21.1k
  BalancedDelimiterTracker PT(*this, tok::l_paren);
2471
21.1k
  PT.consumeOpen();
2472
2473
  // TODO: Build AST.
2474
2475
21.1k
  switch (T) {
2476
0
  default: llvm_unreachable("Not a builtin primary expression!");
2477
1.00k
  case tok::kw___builtin_va_arg: {
2478
1.00k
    ExprResult Expr(ParseAssignmentExpression());
2479
2480
1.00k
    if (ExpectAndConsume(tok::comma)) {
2481
0
      SkipUntil(tok::r_paren, StopAtSemi);
2482
0
      Expr = ExprError();
2483
0
    }
2484
2485
1.00k
    TypeResult Ty = ParseTypeName();
2486
2487
1.00k
    if (Tok.isNot(tok::r_paren)) {
2488
0
      Diag(Tok, diag::err_expected) << tok::r_paren;
2489
0
      Expr = ExprError();
2490
0
    }
2491
2492
1.00k
    if (Expr.isInvalid() || Ty.isInvalid())
2493
0
      Res = ExprError();
2494
1.00k
    else
2495
1.00k
      Res = Actions.ActOnVAArg(StartLoc, Expr.get(), Ty.get(), ConsumeParen());
2496
1.00k
    break;
2497
0
  }
2498
332
  case tok::kw___builtin_offsetof: {
2499
332
    SourceLocation TypeLoc = Tok.getLocation();
2500
332
    TypeResult Ty = ParseTypeName();
2501
332
    if (Ty.isInvalid()) {
2502
1
      SkipUntil(tok::r_paren, StopAtSemi);
2503
1
      return ExprError();
2504
1
    }
2505
2506
331
    if (ExpectAndConsume(tok::comma)) {
2507
0
      SkipUntil(tok::r_paren, StopAtSemi);
2508
0
      return ExprError();
2509
0
    }
2510
2511
    // We must have at least one identifier here.
2512
331
    if (Tok.isNot(tok::identifier)) {
2513
0
      Diag(Tok, diag::err_expected) << tok::identifier;
2514
0
      SkipUntil(tok::r_paren, StopAtSemi);
2515
0
      return ExprError();
2516
0
    }
2517
2518
    // Keep track of the various subcomponents we see.
2519
331
    SmallVector<Sema::OffsetOfComponent, 4> Comps;
2520
2521
331
    Comps.push_back(Sema::OffsetOfComponent());
2522
331
    Comps.back().isBrackets = false;
2523
331
    Comps.back().U.IdentInfo = Tok.getIdentifierInfo();
2524
331
    Comps.back().LocStart = Comps.back().LocEnd = ConsumeToken();
2525
2526
    // FIXME: This loop leaks the index expressions on error.
2527
392
    while (1) {
2528
392
      if (Tok.is(tok::period)) {
2529
        // offsetof-member-designator: offsetof-member-designator '.' identifier
2530
19
        Comps.push_back(Sema::OffsetOfComponent());
2531
19
        Comps.back().isBrackets = false;
2532
19
        Comps.back().LocStart = ConsumeToken();
2533
2534
19
        if (Tok.isNot(tok::identifier)) {
2535
0
          Diag(Tok, diag::err_expected) << tok::identifier;
2536
0
          SkipUntil(tok::r_paren, StopAtSemi);
2537
0
          return ExprError();
2538
0
        }
2539
19
        Comps.back().U.IdentInfo = Tok.getIdentifierInfo();
2540
19
        Comps.back().LocEnd = ConsumeToken();
2541
2542
373
      } else if (Tok.is(tok::l_square)) {
2543
42
        if (CheckProhibitedCXX11Attribute())
2544
0
          return ExprError();
2545
2546
        // offsetof-member-designator: offsetof-member-design '[' expression ']'
2547
42
        Comps.push_back(Sema::OffsetOfComponent());
2548
42
        Comps.back().isBrackets = true;
2549
42
        BalancedDelimiterTracker ST(*this, tok::l_square);
2550
42
        ST.consumeOpen();
2551
42
        Comps.back().LocStart = ST.getOpenLocation();
2552
42
        Res = ParseExpression();
2553
42
        if (Res.isInvalid()) {
2554
0
          SkipUntil(tok::r_paren, StopAtSemi);
2555
0
          return Res;
2556
0
        }
2557
42
        Comps.back().U.E = Res.get();
2558
2559
42
        ST.consumeClose();
2560
42
        Comps.back().LocEnd = ST.getCloseLocation();
2561
331
      } else {
2562
331
        if (Tok.isNot(tok::r_paren)) {
2563
2
          PT.consumeClose();
2564
2
          Res = ExprError();
2565
329
        } else if (Ty.isInvalid()) {
2566
0
          Res = ExprError();
2567
329
        } else {
2568
329
          PT.consumeClose();
2569
329
          Res = Actions.ActOnBuiltinOffsetOf(getCurScope(), StartLoc, TypeLoc,
2570
329
                                             Ty.get(), Comps,
2571
329
                                             PT.getCloseLocation());
2572
329
        }
2573
331
        break;
2574
331
      }
2575
392
    }
2576
331
    break;
2577
331
  }
2578
61
  case tok::kw___builtin_choose_expr: {
2579
61
    ExprResult Cond(ParseAssignmentExpression());
2580
61
    if (Cond.isInvalid()) {
2581
0
      SkipUntil(tok::r_paren, StopAtSemi);
2582
0
      return Cond;
2583
0
    }
2584
61
    if (ExpectAndConsume(tok::comma)) {
2585
0
      SkipUntil(tok::r_paren, StopAtSemi);
2586
0
      return ExprError();
2587
0
    }
2588
2589
61
    ExprResult Expr1(ParseAssignmentExpression());
2590
61
    if (Expr1.isInvalid()) {
2591
0
      SkipUntil(tok::r_paren, StopAtSemi);
2592
0
      return Expr1;
2593
0
    }
2594
61
    if (ExpectAndConsume(tok::comma)) {
2595
0
      SkipUntil(tok::r_paren, StopAtSemi);
2596
0
      return ExprError();
2597
0
    }
2598
2599
61
    ExprResult Expr2(ParseAssignmentExpression());
2600
61
    if (Expr2.isInvalid()) {
2601
0
      SkipUntil(tok::r_paren, StopAtSemi);
2602
0
      return Expr2;
2603
0
    }
2604
61
    if (Tok.isNot(tok::r_paren)) {
2605
0
      Diag(Tok, diag::err_expected) << tok::r_paren;
2606
0
      return ExprError();
2607
0
    }
2608
61
    Res = Actions.ActOnChooseExpr(StartLoc, Cond.get(), Expr1.get(),
2609
61
                                  Expr2.get(), ConsumeParen());
2610
61
    break;
2611
61
  }
2612
30
  case tok::kw___builtin_astype: {
2613
    // The first argument is an expression to be converted, followed by a comma.
2614
30
    ExprResult Expr(ParseAssignmentExpression());
2615
30
    if (Expr.isInvalid()) {
2616
0
      SkipUntil(tok::r_paren, StopAtSemi);
2617
0
      return ExprError();
2618
0
    }
2619
2620
30
    if (ExpectAndConsume(tok::comma)) {
2621
0
      SkipUntil(tok::r_paren, StopAtSemi);
2622
0
      return ExprError();
2623
0
    }
2624
2625
    // Second argument is the type to bitcast to.
2626
30
    TypeResult DestTy = ParseTypeName();
2627
30
    if (DestTy.isInvalid())
2628
0
      return ExprError();
2629
2630
    // Attempt to consume the r-paren.
2631
30
    if (Tok.isNot(tok::r_paren)) {
2632
0
      Diag(Tok, diag::err_expected) << tok::r_paren;
2633
0
      SkipUntil(tok::r_paren, StopAtSemi);
2634
0
      return ExprError();
2635
0
    }
2636
2637
30
    Res = Actions.ActOnAsTypeExpr(Expr.get(), DestTy.get(), StartLoc,
2638
30
                                  ConsumeParen());
2639
30
    break;
2640
30
  }
2641
19.6k
  case tok::kw___builtin_convertvector: {
2642
    // The first argument is an expression to be converted, followed by a comma.
2643
19.6k
    ExprResult Expr(ParseAssignmentExpression());
2644
19.6k
    if (Expr.isInvalid()) {
2645
0
      SkipUntil(tok::r_paren, StopAtSemi);
2646
0
      return ExprError();
2647
0
    }
2648
2649
19.6k
    if (ExpectAndConsume(tok::comma)) {
2650
0
      SkipUntil(tok::r_paren, StopAtSemi);
2651
0
      return ExprError();
2652
0
    }
2653
2654
    // Second argument is the type to bitcast to.
2655
19.6k
    TypeResult DestTy = ParseTypeName();
2656
19.6k
    if (DestTy.isInvalid())
2657
0
      return ExprError();
2658
2659
    // Attempt to consume the r-paren.
2660
19.6k
    if (Tok.isNot(tok::r_paren)) {
2661
0
      Diag(Tok, diag::err_expected) << tok::r_paren;
2662
0
      SkipUntil(tok::r_paren, StopAtSemi);
2663
0
      return ExprError();
2664
0
    }
2665
2666
19.6k
    Res = Actions.ActOnConvertVectorExpr(Expr.get(), DestTy.get(), StartLoc,
2667
19.6k
                                         ConsumeParen());
2668
19.6k
    break;
2669
19.6k
  }
2670
16
  case tok::kw___builtin_COLUMN:
2671
35
  case tok::kw___builtin_FILE:
2672
56
  case tok::kw___builtin_FUNCTION:
2673
110
  case tok::kw___builtin_LINE: {
2674
    // Attempt to consume the r-paren.
2675
110
    if (Tok.isNot(tok::r_paren)) {
2676
8
      Diag(Tok, diag::err_expected) << tok::r_paren;
2677
8
      SkipUntil(tok::r_paren, StopAtSemi);
2678
8
      return ExprError();
2679
8
    }
2680
102
    SourceLocExpr::IdentKind Kind = [&] {
2681
102
      switch (T) {
2682
17
      case tok::kw___builtin_FILE:
2683
17
        return SourceLocExpr::File;
2684
19
      case tok::kw___builtin_FUNCTION:
2685
19
        return SourceLocExpr::Function;
2686
52
      case tok::kw___builtin_LINE:
2687
52
        return SourceLocExpr::Line;
2688
14
      case tok::kw___builtin_COLUMN:
2689
14
        return SourceLocExpr::Column;
2690
0
      default:
2691
0
        llvm_unreachable("invalid keyword");
2692
102
      }
2693
102
    }();
2694
102
    Res = Actions.ActOnSourceLocExpr(Kind, StartLoc, ConsumeParen());
2695
102
    break;
2696
102
  }
2697
21.1k
  }
2698
2699
21.1k
  if (Res.isInvalid())
2700
33
    return ExprError();
2701
2702
  // These can be followed by postfix-expr pieces because they are
2703
  // primary-expressions.
2704
21.1k
  return ParsePostfixExpressionSuffix(Res.get());
2705
21.1k
}
2706
2707
127
bool Parser::tryParseOpenMPArrayShapingCastPart() {
2708
127
  assert(Tok.is(tok::l_square) && "Expected open bracket");
2709
127
  bool ErrorFound = true;
2710
127
  TentativeParsingAction TPA(*this);
2711
265
  do {
2712
265
    if (Tok.isNot(tok::l_square))
2713
0
      break;
2714
    // Consume '['
2715
265
    ConsumeBracket();
2716
    // Skip inner expression.
2717
265
    while (!SkipUntil(tok::r_square, tok::annot_pragma_openmp_end,
2718
265
                      StopAtSemi | StopBeforeMatch))
2719
0
      ;
2720
265
    if (Tok.isNot(tok::r_square))
2721
4
      break;
2722
    // Consume ']'
2723
261
    ConsumeBracket();
2724
    // Found ')' - done.
2725
261
    if (Tok.is(tok::r_paren)) {
2726
119
      ErrorFound = false;
2727
119
      break;
2728
119
    }
2729
142
  } while (Tok.isNot(tok::annot_pragma_openmp_end));
2730
127
  TPA.Revert();
2731
127
  return !ErrorFound;
2732
127
}
2733
2734
/// ParseParenExpression - This parses the unit that starts with a '(' token,
2735
/// based on what is allowed by ExprType.  The actual thing parsed is returned
2736
/// in ExprType. If stopIfCastExpr is true, it will only return the parsed type,
2737
/// not the parsed cast-expression.
2738
///
2739
/// \verbatim
2740
///       primary-expression: [C99 6.5.1]
2741
///         '(' expression ')'
2742
/// [GNU]   '(' compound-statement ')'      (if !ParenExprOnly)
2743
///       postfix-expression: [C99 6.5.2]
2744
///         '(' type-name ')' '{' initializer-list '}'
2745
///         '(' type-name ')' '{' initializer-list ',' '}'
2746
///       cast-expression: [C99 6.5.4]
2747
///         '(' type-name ')' cast-expression
2748
/// [ARC]   bridged-cast-expression
2749
/// [ARC] bridged-cast-expression:
2750
///         (__bridge type-name) cast-expression
2751
///         (__bridge_transfer type-name) cast-expression
2752
///         (__bridge_retained type-name) cast-expression
2753
///       fold-expression: [C++1z]
2754
///         '(' cast-expression fold-operator '...' ')'
2755
///         '(' '...' fold-operator cast-expression ')'
2756
///         '(' cast-expression fold-operator '...'
2757
///                 fold-operator cast-expression ')'
2758
/// [OPENMP] Array shaping operation
2759
///       '(' '[' expression ']' { '[' expression ']' } cast-expression
2760
/// \endverbatim
2761
ExprResult
2762
Parser::ParseParenExpression(ParenParseOption &ExprType, bool stopIfCastExpr,
2763
                             bool isTypeCast, ParsedType &CastTy,
2764
5.42M
                             SourceLocation &RParenLoc) {
2765
5.42M
  assert(Tok.is(tok::l_paren) && "Not a paren expr!");
2766
5.42M
  ColonProtectionRAIIObject ColonProtection(*this, false);
2767
5.42M
  BalancedDelimiterTracker T(*this, tok::l_paren);
2768
5.42M
  if (T.consumeOpen())
2769
0
    return ExprError();
2770
5.42M
  SourceLocation OpenLoc = T.getOpenLocation();
2771
2772
5.42M
  PreferredType.enterParenExpr(Tok.getLocation(), OpenLoc);
2773
2774
5.42M
  ExprResult Result(true);
2775
5.42M
  bool isAmbiguousTypeId;
2776
5.42M
  CastTy = nullptr;
2777
2778
5.42M
  if (Tok.is(tok::code_completion)) {
2779
30
    Actions.CodeCompleteExpression(
2780
30
        getCurScope(), PreferredType.get(Tok.getLocation()),
2781
30
        /*IsParenthesized=*/ExprType >= CompoundLiteral);
2782
30
    cutOffParsing();
2783
30
    return ExprError();
2784
30
  }
2785
2786
  // Diagnose use of bridge casts in non-arc mode.
2787
5.42M
  bool BridgeCast = (getLangOpts().ObjC &&
2788
845k
                     Tok.isOneOf(tok::kw___bridge,
2789
845k
                                 tok::kw___bridge_transfer,
2790
845k
                                 tok::kw___bridge_retained,
2791
845k
                                 tok::kw___bridge_retain));
2792
5.42M
  if (BridgeCast && 
!getLangOpts().ObjCAutoRefCount417
) {
2793
88
    if (!TryConsumeToken(tok::kw___bridge)) {
2794
8
      StringRef BridgeCastName = Tok.getName();
2795
8
      SourceLocation BridgeKeywordLoc = ConsumeToken();
2796
8
      if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc))
2797
8
        Diag(BridgeKeywordLoc, diag::warn_arc_bridge_cast_nonarc)
2798
8
          << BridgeCastName
2799
8
          << FixItHint::CreateReplacement(BridgeKeywordLoc, "");
2800
8
    }
2801
88
    BridgeCast = false;
2802
88
  }
2803
2804
  // None of these cases should fall through with an invalid Result
2805
  // unless they've already reported an error.
2806
5.42M
  if (ExprType >= CompoundStmt && 
Tok.is(tok::l_brace)5.42M
) {
2807
8.87k
    Diag(Tok, diag::ext_gnu_statement_expr);
2808
2809
8.87k
    checkCompoundToken(OpenLoc, tok::l_paren, CompoundToken::StmtExprBegin);
2810
2811
8.87k
    if (!getCurScope()->getFnParent() && 
!getCurScope()->getBlockParent()2
) {
2812
2
      Result = ExprError(Diag(OpenLoc, diag::err_stmtexpr_file_scope));
2813
8.86k
    } else {
2814
      // Find the nearest non-record decl context. Variables declared in a
2815
      // statement expression behave as if they were declared in the enclosing
2816
      // function, block, or other code construct.
2817
8.86k
      DeclContext *CodeDC = Actions.CurContext;
2818
8.87k
      while (CodeDC->isRecord() || 
isa<EnumDecl>(CodeDC)8.86k
) {
2819
3
        CodeDC = CodeDC->getParent();
2820
3
        assert(CodeDC && !CodeDC->isFileContext() &&
2821
3
               "statement expr not in code context");
2822
3
      }
2823
8.86k
      Sema::ContextRAII SavedContext(Actions, CodeDC, /*NewThisContext=*/false);
2824
2825
8.86k
      Actions.ActOnStartStmtExpr();
2826
2827
8.86k
      StmtResult Stmt(ParseCompoundStatement(true));
2828
8.86k
      ExprType = CompoundStmt;
2829
2830
      // If the substmt parsed correctly, build the AST node.
2831
8.86k
      if (!Stmt.isInvalid()) {
2832
8.86k
        Result = Actions.ActOnStmtExpr(getCurScope(), OpenLoc, Stmt.get(),
2833
8.86k
                                       Tok.getLocation());
2834
0
      } else {
2835
0
        Actions.ActOnStmtExprError();
2836
0
      }
2837
8.86k
    }
2838
5.41M
  } else if (ExprType >= CompoundLiteral && 
BridgeCast5.41M
) {
2839
329
    tok::TokenKind tokenKind = Tok.getKind();
2840
329
    SourceLocation BridgeKeywordLoc = ConsumeToken();
2841
2842
    // Parse an Objective-C ARC ownership cast expression.
2843
329
    ObjCBridgeCastKind Kind;
2844
329
    if (tokenKind == tok::kw___bridge)
2845
122
      Kind = OBC_Bridge;
2846
207
    else if (tokenKind == tok::kw___bridge_transfer)
2847
105
      Kind = OBC_BridgeTransfer;
2848
102
    else if (tokenKind == tok::kw___bridge_retained)
2849
98
      Kind = OBC_BridgeRetained;
2850
4
    else {
2851
      // As a hopefully temporary workaround, allow __bridge_retain as
2852
      // a synonym for __bridge_retained, but only in system headers.
2853
4
      assert(tokenKind == tok::kw___bridge_retain);
2854
4
      Kind = OBC_BridgeRetained;
2855
4
      if (!PP.getSourceManager().isInSystemHeader(BridgeKeywordLoc))
2856
2
        Diag(BridgeKeywordLoc, diag::err_arc_bridge_retain)
2857
2
          << FixItHint::CreateReplacement(BridgeKeywordLoc,
2858
2
                                          "__bridge_retained");
2859
4
    }
2860
2861
329
    TypeResult Ty = ParseTypeName();
2862
329
    T.consumeClose();
2863
329
    ColonProtection.restore();
2864
329
    RParenLoc = T.getCloseLocation();
2865
2866
329
    PreferredType.enterTypeCast(Tok.getLocation(), Ty.get().get());
2867
329
    ExprResult SubExpr = ParseCastExpression(AnyCastExpr);
2868
2869
329
    if (Ty.isInvalid() || SubExpr.isInvalid())
2870
0
      return ExprError();
2871
2872
329
    return Actions.ActOnObjCBridgedCast(getCurScope(), OpenLoc, Kind,
2873
329
                                        BridgeKeywordLoc, Ty.get(),
2874
329
                                        RParenLoc, SubExpr.get());
2875
5.41M
  } else if (ExprType >= CompoundLiteral &&
2876
5.41M
             isTypeIdInParens(isAmbiguousTypeId)) {
2877
2878
    // Otherwise, this is a compound literal expression or cast expression.
2879
2880
    // In C++, if the type-id is ambiguous we disambiguate based on context.
2881
    // If stopIfCastExpr is true the context is a typeof/sizeof/alignof
2882
    // in which case we should treat it as type-id.
2883
    // if stopIfCastExpr is false, we need to determine the context past the
2884
    // parens, so we defer to ParseCXXAmbiguousParenExpression for that.
2885
4.35M
    if (isAmbiguousTypeId && 
!stopIfCastExpr1.50k
) {
2886
1.42k
      ExprResult res = ParseCXXAmbiguousParenExpression(ExprType, CastTy, T,
2887
1.42k
                                                        ColonProtection);
2888
1.42k
      RParenLoc = T.getCloseLocation();
2889
1.42k
      return res;
2890
1.42k
    }
2891
2892
    // Parse the type declarator.
2893
4.35M
    DeclSpec DS(AttrFactory);
2894
4.35M
    ParseSpecifierQualifierList(DS);
2895
4.35M
    Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName);
2896
4.35M
    ParseDeclarator(DeclaratorInfo);
2897
2898
    // If our type is followed by an identifier and either ':' or ']', then
2899
    // this is probably an Objective-C message send where the leading '[' is
2900
    // missing. Recover as if that were the case.
2901
4.35M
    if (!DeclaratorInfo.isInvalidType() && 
Tok.is(tok::identifier)4.35M
&&
2902
77
        !InMessageExpression && getLangOpts().ObjC &&
2903
75
        (NextToken().is(tok::colon) || 
NextToken().is(tok::r_square)0
)) {
2904
75
      TypeResult Ty;
2905
75
      {
2906
75
        InMessageExpressionRAIIObject InMessage(*this, false);
2907
75
        Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
2908
75
      }
2909
75
      Result = ParseObjCMessageExpressionBody(SourceLocation(),
2910
75
                                              SourceLocation(),
2911
75
                                              Ty.get(), nullptr);
2912
4.35M
    } else {
2913
      // Match the ')'.
2914
4.35M
      T.consumeClose();
2915
4.35M
      ColonProtection.restore();
2916
4.35M
      RParenLoc = T.getCloseLocation();
2917
4.35M
      if (Tok.is(tok::l_brace)) {
2918
50.5k
        ExprType = CompoundLiteral;
2919
50.5k
        TypeResult Ty;
2920
50.5k
        {
2921
50.5k
          InMessageExpressionRAIIObject InMessage(*this, false);
2922
50.5k
          Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
2923
50.5k
        }
2924
50.5k
        return ParseCompoundLiteralExpression(Ty.get(), OpenLoc, RParenLoc);
2925
50.5k
      }
2926
2927
4.30M
      if (Tok.is(tok::l_paren)) {
2928
        // This could be OpenCL vector Literals
2929
395k
        if (getLangOpts().OpenCL)
2930
455
        {
2931
455
          TypeResult Ty;
2932
455
          {
2933
455
            InMessageExpressionRAIIObject InMessage(*this, false);
2934
455
            Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
2935
455
          }
2936
455
          if(Ty.isInvalid())
2937
0
          {
2938
0
             return ExprError();
2939
0
          }
2940
455
          QualType QT = Ty.get().get().getCanonicalType();
2941
455
          if (QT->isVectorType())
2942
151
          {
2943
            // We parsed '(' vector-type-name ')' followed by '('
2944
2945
            // Parse the cast-expression that follows it next.
2946
            // isVectorLiteral = true will make sure we don't parse any
2947
            // Postfix expression yet
2948
151
            Result = ParseCastExpression(/*isUnaryExpression=*/AnyCastExpr,
2949
151
                                         /*isAddressOfOperand=*/false,
2950
151
                                         /*isTypeCast=*/IsTypeCast,
2951
151
                                         /*isVectorLiteral=*/true);
2952
2953
151
            if (!Result.isInvalid()) {
2954
151
              Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc,
2955
151
                                             DeclaratorInfo, CastTy,
2956
151
                                             RParenLoc, Result.get());
2957
151
            }
2958
2959
            // After we performed the cast we can check for postfix-expr pieces.
2960
151
            if (!Result.isInvalid()) {
2961
148
              Result = ParsePostfixExpressionSuffix(Result);
2962
148
            }
2963
2964
151
            return Result;
2965
151
          }
2966
4.30M
        }
2967
395k
      }
2968
2969
4.30M
      if (ExprType == CastExpr) {
2970
        // We parsed '(' type-name ')' and the thing after it wasn't a '{'.
2971
2972
4.30M
        if (DeclaratorInfo.isInvalidType())
2973
7
          return ExprError();
2974
2975
        // Note that this doesn't parse the subsequent cast-expression, it just
2976
        // returns the parsed type to the callee.
2977
4.30M
        if (stopIfCastExpr) {
2978
71.2k
          TypeResult Ty;
2979
71.2k
          {
2980
71.2k
            InMessageExpressionRAIIObject InMessage(*this, false);
2981
71.2k
            Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
2982
71.2k
          }
2983
71.2k
          CastTy = Ty.get();
2984
71.2k
          return ExprResult();
2985
71.2k
        }
2986
2987
        // Reject the cast of super idiom in ObjC.
2988
4.23M
        if (Tok.is(tok::identifier) && 
getLangOpts().ObjC3.67M
&&
2989
332k
            Tok.getIdentifierInfo() == Ident_super &&
2990
10
            getCurScope()->isInObjcMethodScope() &&
2991
8
            GetLookAheadToken(1).isNot(tok::period)) {
2992
7
          Diag(Tok.getLocation(), diag::err_illegal_super_cast)
2993
7
            << SourceRange(OpenLoc, RParenLoc);
2994
7
          return ExprError();
2995
7
        }
2996
2997
4.23M
        PreferredType.enterTypeCast(Tok.getLocation(), CastTy.get());
2998
        // Parse the cast-expression that follows it next.
2999
        // TODO: For cast expression with CastTy.
3000
4.23M
        Result = ParseCastExpression(/*isUnaryExpression=*/AnyCastExpr,
3001
4.23M
                                     /*isAddressOfOperand=*/false,
3002
4.23M
                                     /*isTypeCast=*/IsTypeCast);
3003
4.23M
        if (!Result.isInvalid()) {
3004
4.23M
          Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc,
3005
4.23M
                                         DeclaratorInfo, CastTy,
3006
4.23M
                                         RParenLoc, Result.get());
3007
4.23M
        }
3008
4.23M
        return Result;
3009
4.23M
      }
3010
3011
0
      Diag(Tok, diag::err_expected_lbrace_in_compound_literal);
3012
0
      return ExprError();
3013
0
    }
3014
1.06M
  } else if (ExprType >= FoldExpr && Tok.is(tok::ellipsis) &&
3015
20
             isFoldOperator(NextToken().getKind())) {
3016
16
    ExprType = FoldExpr;
3017
16
    return ParseFoldExpression(ExprResult(), T);
3018
1.06M
  } else if (isTypeCast) {
3019
    // Parse the expression-list.
3020
317k
    InMessageExpressionRAIIObject InMessage(*this, false);
3021
3022
317k
    ExprVector ArgExprs;
3023
317k
    CommaLocsTy CommaLocs;
3024
3025
317k
    if (!ParseSimpleExpressionList(ArgExprs, CommaLocs)) {
3026
      // FIXME: If we ever support comma expressions as operands to
3027
      // fold-expressions, we'll need to allow multiple ArgExprs here.
3028
317k
      if (ExprType >= FoldExpr && ArgExprs.size() == 1 &&
3029
308k
          isFoldOperator(Tok.getKind()) && 
NextToken().is(tok::ellipsis)30
) {
3030
30
        ExprType = FoldExpr;
3031
30
        return ParseFoldExpression(ArgExprs[0], T);
3032
30
      }
3033
3034
317k
      ExprType = SimpleExpr;
3035
317k
      Result = Actions.ActOnParenListExpr(OpenLoc, Tok.getLocation(),
3036
317k
                                          ArgExprs);
3037
317k
    }
3038
743k
  } else if (getLangOpts().OpenMP >= 50 && 
OpenMPDirectiveParsing3.71k
&&
3039
1.10k
             ExprType == CastExpr && Tok.is(tok::l_square) &&
3040
127
             tryParseOpenMPArrayShapingCastPart()) {
3041
119
    bool ErrorFound = false;
3042
119
    SmallVector<Expr *, 4> OMPDimensions;
3043
119
    SmallVector<SourceRange, 4> OMPBracketsRanges;
3044
257
    do {
3045
257
      BalancedDelimiterTracker TS(*this, tok::l_square);
3046
257
      TS.consumeOpen();
3047
257
      ExprResult NumElements =
3048
257
          Actions.CorrectDelayedTyposInExpr(ParseExpression());
3049
257
      if (!NumElements.isUsable()) {
3050
12
        ErrorFound = true;
3051
12
        while (!SkipUntil(tok::r_square, tok::r_paren,
3052
12
                          StopAtSemi | StopBeforeMatch))
3053
0
          ;
3054
12
      }
3055
257
      TS.consumeClose();
3056
257
      OMPDimensions.push_back(NumElements.get());
3057
257
      OMPBracketsRanges.push_back(TS.getRange());
3058
257
    } while (Tok.isNot(tok::r_paren));
3059
    // Match the ')'.
3060
119
    T.consumeClose();
3061
119
    RParenLoc = T.getCloseLocation();
3062
119
    Result = Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression());
3063
119
    if (ErrorFound) {
3064
12
      Result = ExprError();
3065
107
    } else if (!Result.isInvalid()) {
3066
107
      Result = Actions.ActOnOMPArrayShapingExpr(
3067
107
          Result.get(), OpenLoc, RParenLoc, OMPDimensions, OMPBracketsRanges);
3068
107
    }
3069
119
    return Result;
3070
743k
  } else {
3071
743k
    InMessageExpressionRAIIObject InMessage(*this, false);
3072
3073
743k
    Result = ParseExpression(MaybeTypeCast);
3074
743k
    if (!getLangOpts().CPlusPlus && 
MaybeTypeCast358k
&&
Result.isUsable()358k
) {
3075
      // Correct typos in non-C++ code earlier so that implicit-cast-like
3076
      // expressions are parsed correctly.
3077
358k
      Result = Actions.CorrectDelayedTyposInExpr(Result);
3078
358k
    }
3079
3080
743k
    if (ExprType >= FoldExpr && isFoldOperator(Tok.getKind()) &&
3081
160
        NextToken().is(tok::ellipsis)) {
3082
160
      ExprType = FoldExpr;
3083
160
      return ParseFoldExpression(Result, T);
3084
160
    }
3085
743k
    ExprType = SimpleExpr;
3086
3087
    // Don't build a paren expression unless we actually match a ')'.
3088
743k
    if (!Result.isInvalid() && 
Tok.is(tok::r_paren)743k
)
3089
743k
      Result =
3090
743k
          Actions.ActOnParenExpr(OpenLoc, Tok.getLocation(), Result.get());
3091
743k
  }
3092
3093
  // Match the ')'.
3094
1.07M
  if (Result.isInvalid()) {
3095
568
    SkipUntil(tok::r_paren, StopAtSemi);
3096
568
    return ExprError();
3097
568
  }
3098
3099
1.06M
  T.consumeClose();
3100
1.06M
  RParenLoc = T.getCloseLocation();
3101
1.06M
  return Result;
3102
1.06M
}
3103
3104
/// ParseCompoundLiteralExpression - We have parsed the parenthesized type-name
3105
/// and we are at the left brace.
3106
///
3107
/// \verbatim
3108
///       postfix-expression: [C99 6.5.2]
3109
///         '(' type-name ')' '{' initializer-list '}'
3110
///         '(' type-name ')' '{' initializer-list ',' '}'
3111
/// \endverbatim
3112
ExprResult
3113
Parser::ParseCompoundLiteralExpression(ParsedType Ty,
3114
                                       SourceLocation LParenLoc,
3115
50.5k
                                       SourceLocation RParenLoc) {
3116
50.5k
  assert(Tok.is(tok::l_brace) && "Not a compound literal!");
3117
50.5k
  if (!getLangOpts().C99)   // Compound literals don't exist in C90.
3118
6.13k
    Diag(LParenLoc, diag::ext_c99_compound_literal);
3119
50.5k
  PreferredType.enterTypeCast(Tok.getLocation(), Ty.get());
3120
50.5k
  ExprResult Result = ParseInitializer();
3121
50.5k
  if (!Result.isInvalid() && 
Ty50.5k
)
3122
50.5k
    return Actions.ActOnCompoundLiteral(LParenLoc, Ty, RParenLoc, Result.get());
3123
4
  return Result;
3124
4
}
3125
3126
/// ParseStringLiteralExpression - This handles the various token types that
3127
/// form string literals, and also handles string concatenation [C99 5.1.1.2,
3128
/// translation phase #6].
3129
///
3130
/// \verbatim
3131
///       primary-expression: [C99 6.5.1]
3132
///         string-literal
3133
/// \verbatim
3134
4.05M
ExprResult Parser::ParseStringLiteralExpression(bool AllowUserDefinedLiteral) {
3135
4.05M
  assert(isTokenStringLiteral() && "Not a string literal!");
3136
3137
  // String concat.  Note that keywords like __func__ and __FUNCTION__ are not
3138
  // considered to be strings for concatenation purposes.
3139
4.05M
  SmallVector<Token, 4> StringToks;
3140
3141
4.26M
  do {
3142
4.26M
    StringToks.push_back(Tok);
3143
4.26M
    ConsumeStringToken();
3144
4.26M
  } while (isTokenStringLiteral());
3145
3146
  // Pass the set of string tokens, ready for concatenation, to the actions.
3147
4.05M
  return Actions.ActOnStringLiteral(StringToks,
3148
2.98M
                                    AllowUserDefinedLiteral ? getCurScope()
3149
1.07M
                                                            : nullptr);
3150
4.05M
}
3151
3152
/// ParseGenericSelectionExpression - Parse a C11 generic-selection
3153
/// [C11 6.5.1.1].
3154
///
3155
/// \verbatim
3156
///    generic-selection:
3157
///           _Generic ( assignment-expression , generic-assoc-list )
3158
///    generic-assoc-list:
3159
///           generic-association
3160
///           generic-assoc-list , generic-association
3161
///    generic-association:
3162
///           type-name : assignment-expression
3163
///           default : assignment-expression
3164
/// \endverbatim
3165
435
ExprResult Parser::ParseGenericSelectionExpression() {
3166
435
  assert(Tok.is(tok::kw__Generic) && "_Generic keyword expected");
3167
435
  if (!getLangOpts().C11)
3168
65
    Diag(Tok, diag::ext_c11_feature) << Tok.getName();
3169
3170
435
  SourceLocation KeyLoc = ConsumeToken();
3171
435
  BalancedDelimiterTracker T(*this, tok::l_paren);
3172
435
  if (T.expectAndConsume())
3173
1
    return ExprError();
3174
3175
434
  ExprResult ControllingExpr;
3176
434
  {
3177
    // C11 6.5.1.1p3 "The controlling expression of a generic selection is
3178
    // not evaluated."
3179
434
    EnterExpressionEvaluationContext Unevaluated(
3180
434
        Actions, Sema::ExpressionEvaluationContext::Unevaluated);
3181
434
    ControllingExpr =
3182
434
        Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression());
3183
434
    if (ControllingExpr.isInvalid()) {
3184
1
      SkipUntil(tok::r_paren, StopAtSemi);
3185
1
      return ExprError();
3186
1
    }
3187
433
  }
3188
3189
433
  if (ExpectAndConsume(tok::comma)) {
3190
1
    SkipUntil(tok::r_paren, StopAtSemi);
3191
1
    return ExprError();
3192
1
  }
3193
3194
432
  SourceLocation DefaultLoc;
3195
432
  TypeVector Types;
3196
432
  ExprVector Exprs;
3197
1.22k
  do {
3198
1.22k
    ParsedType Ty;
3199
1.22k
    if (Tok.is(tok::kw_default)) {
3200
      // C11 6.5.1.1p2 "A generic selection shall have no more than one default
3201
      // generic association."
3202
64
      if (!DefaultLoc.isInvalid()) {
3203
1
        Diag(Tok, diag::err_duplicate_default_assoc);
3204
1
        Diag(DefaultLoc, diag::note_previous_default_assoc);
3205
1
        SkipUntil(tok::r_paren, StopAtSemi);
3206
1
        return ExprError();
3207
1
      }
3208
63
      DefaultLoc = ConsumeToken();
3209
63
      Ty = nullptr;
3210
1.16k
    } else {
3211
1.16k
      ColonProtectionRAIIObject X(*this);
3212
1.16k
      TypeResult TR = ParseTypeName();
3213
1.16k
      if (TR.isInvalid()) {
3214
0
        SkipUntil(tok::r_paren, StopAtSemi);
3215
0
        return ExprError();
3216
0
      }
3217
1.16k
      Ty = TR.get();
3218
1.16k
    }
3219
1.22k
    Types.push_back(Ty);
3220
3221
1.22k
    if (ExpectAndConsume(tok::colon)) {
3222
1
      SkipUntil(tok::r_paren, StopAtSemi);
3223
1
      return ExprError();
3224
1
    }
3225
3226
    // FIXME: These expressions should be parsed in a potentially potentially
3227
    // evaluated context.
3228
1.22k
    ExprResult ER(
3229
1.22k
        Actions.CorrectDelayedTyposInExpr(ParseAssignmentExpression()));
3230
1.22k
    if (ER.isInvalid()) {
3231
0
      SkipUntil(tok::r_paren, StopAtSemi);
3232
0
      return ExprError();
3233
0
    }
3234
1.22k
    Exprs.push_back(ER.get());
3235
1.22k
  } while (TryConsumeToken(tok::comma));
3236
3237
430
  T.consumeClose();
3238
430
  if (T.getCloseLocation().isInvalid())
3239
0
    return ExprError();
3240
3241
430
  return Actions.ActOnGenericSelectionExpr(KeyLoc, DefaultLoc,
3242
430
                                           T.getCloseLocation(),
3243
430
                                           ControllingExpr.get(),
3244
430
                                           Types, Exprs);
3245
430
}
3246
3247
/// Parse A C++1z fold-expression after the opening paren and optional
3248
/// left-hand-side expression.
3249
///
3250
/// \verbatim
3251
///   fold-expression:
3252
///       ( cast-expression fold-operator ... )
3253
///       ( ... fold-operator cast-expression )
3254
///       ( cast-expression fold-operator ... fold-operator cast-expression )
3255
ExprResult Parser::ParseFoldExpression(ExprResult LHS,
3256
206
                                       BalancedDelimiterTracker &T) {
3257
206
  if (LHS.isInvalid()) {
3258
1
    T.skipToEnd();
3259
1
    return true;
3260
1
  }
3261
3262
205
  tok::TokenKind Kind = tok::unknown;
3263
205
  SourceLocation FirstOpLoc;
3264
205
  if (LHS.isUsable()) {
3265
189
    Kind = Tok.getKind();
3266
189
    assert(isFoldOperator(Kind) && "missing fold-operator");
3267
189
    FirstOpLoc = ConsumeToken();
3268
189
  }
3269
3270
205
  assert(Tok.is(tok::ellipsis) && "not a fold-expression");
3271
205
  SourceLocation EllipsisLoc = ConsumeToken();
3272
3273
205
  ExprResult RHS;
3274
205
  if (Tok.isNot(tok::r_paren)) {
3275
73
    if (!isFoldOperator(Tok.getKind()))
3276
1
      return Diag(Tok.getLocation(), diag::err_expected_fold_operator);
3277
3278
72
    if (Kind != tok::unknown && 
Tok.getKind() != Kind56
)
3279
2
      Diag(Tok.getLocation(), diag::err_fold_operator_mismatch)
3280
2
        << SourceRange(FirstOpLoc);
3281
72
    Kind = Tok.getKind();
3282
72
    ConsumeToken();
3283
3284
72
    RHS = ParseExpression();
3285
72
    if (RHS.isInvalid()) {
3286
0
      T.skipToEnd();
3287
0
      return true;
3288
0
    }
3289
204
  }
3290
3291
204
  Diag(EllipsisLoc, getLangOpts().CPlusPlus17
3292
167
                        ? diag::warn_cxx14_compat_fold_expression
3293
37
                        : diag::ext_fold_expression);
3294
3295
204
  T.consumeClose();
3296
204
  return Actions.ActOnCXXFoldExpr(getCurScope(), T.getOpenLocation(), LHS.get(),
3297
204
                                  Kind, EllipsisLoc, RHS.get(),
3298
204
                                  T.getCloseLocation());
3299
204
}
3300
3301
/// ParseExpressionList - Used for C/C++ (argument-)expression-list.
3302
///
3303
/// \verbatim
3304
///       argument-expression-list:
3305
///         assignment-expression
3306
///         argument-expression-list , assignment-expression
3307
///
3308
/// [C++] expression-list:
3309
/// [C++]   assignment-expression
3310
/// [C++]   expression-list , assignment-expression
3311
///
3312
/// [C++0x] expression-list:
3313
/// [C++0x]   initializer-list
3314
///
3315
/// [C++0x] initializer-list
3316
/// [C++0x]   initializer-clause ...[opt]
3317
/// [C++0x]   initializer-list , initializer-clause ...[opt]
3318
///
3319
/// [C++0x] initializer-clause:
3320
/// [C++0x]   assignment-expression
3321
/// [C++0x]   braced-init-list
3322
/// \endverbatim
3323
bool Parser::ParseExpressionList(SmallVectorImpl<Expr *> &Exprs,
3324
                                 SmallVectorImpl<SourceLocation> &CommaLocs,
3325
3.85M
                                 llvm::function_ref<void()> ExpressionStarts) {
3326
3.85M
  bool SawError = false;
3327
8.83M
  while (1) {
3328
8.83M
    if (ExpressionStarts)
3329
8.81M
      ExpressionStarts();
3330
3331
8.83M
    ExprResult Expr;
3332
8.83M
    if (getLangOpts().CPlusPlus11 && 
Tok.is(tok::l_brace)3.53M
) {
3333
1.62k
      Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
3334
1.62k
      Expr = ParseBraceInitializer();
3335
1.62k
    } else
3336
8.83M
      Expr = ParseAssignmentExpression();
3337
3338
8.83M
    if (Tok.is(tok::ellipsis))
3339
43.0k
      Expr = Actions.ActOnPackExpansion(Expr.get(), ConsumeToken());
3340
8.79M
    else if (Tok.is(tok::code_completion)) {
3341
      // There's nothing to suggest in here as we parsed a full expression.
3342
      // Instead fail and propogate the error since caller might have something
3343
      // the suggest, e.g. signature help in function call. Note that this is
3344
      // performed before pushing the \p Expr, so that signature help can report
3345
      // current argument correctly.
3346
1
      SawError = true;
3347
1
      cutOffParsing();
3348
1
      break;
3349
1
    }
3350
8.83M
    if (Expr.isInvalid()) {
3351
5.61k
      SkipUntil(tok::comma, tok::r_paren, StopBeforeMatch);
3352
5.61k
      SawError = true;
3353
8.82M
    } else {
3354
8.82M
      Exprs.push_back(Expr.get());
3355
8.82M
    }
3356
3357
8.83M
    if (Tok.isNot(tok::comma))
3358
3.85M
      break;
3359
    // Move to the next argument, remember where the comma was.
3360
4.97M
    Token Comma = Tok;
3361
4.97M
    CommaLocs.push_back(ConsumeToken());
3362
3363
4.97M
    checkPotentialAngleBracketDelimiter(Comma);
3364
4.97M
  }
3365
3.85M
  if (SawError) {
3366
    // Ensure typos get diagnosed when errors were encountered while parsing the
3367
    // expression list.
3368
3.81k
    for (auto &E : Exprs) {
3369
3.81k
      ExprResult Expr = Actions.CorrectDelayedTyposInExpr(E);
3370
3.81k
      if (Expr.isUsable()) 
E = Expr.get()3.08k
;
3371
3.81k
    }
3372
4.78k
  }
3373
3.85M
  return SawError;
3374
3.85M
}
3375
3376
/// ParseSimpleExpressionList - A simple comma-separated list of expressions,
3377
/// used for misc language extensions.
3378
///
3379
/// \verbatim
3380
///       simple-expression-list:
3381
///         assignment-expression
3382
///         simple-expression-list , assignment-expression
3383
/// \endverbatim
3384
bool
3385
Parser::ParseSimpleExpressionList(SmallVectorImpl<Expr*> &Exprs,
3386
317k
                                  SmallVectorImpl<SourceLocation> &CommaLocs) {
3387
436k
  while (1) {
3388
436k
    ExprResult Expr = ParseAssignmentExpression();
3389
436k
    if (Expr.isInvalid())
3390
7
      return true;
3391
3392
436k
    Exprs.push_back(Expr.get());
3393
3394
436k
    if (Tok.isNot(tok::comma))
3395
317k
      return false;
3396
3397
    // Move to the next argument, remember where the comma was.
3398
119k
    Token Comma = Tok;
3399
119k
    CommaLocs.push_back(ConsumeToken());
3400
3401
119k
    checkPotentialAngleBracketDelimiter(Comma);
3402
119k
  }
3403
317k
}
3404
3405
/// ParseBlockId - Parse a block-id, which roughly looks like int (int x).
3406
///
3407
/// \verbatim
3408
/// [clang] block-id:
3409
/// [clang]   specifier-qualifier-list block-declarator
3410
/// \endverbatim
3411
323
void Parser::ParseBlockId(SourceLocation CaretLoc) {
3412
323
  if (Tok.is(tok::code_completion)) {
3413
1
    Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Type);
3414
1
    return cutOffParsing();
3415
1
  }
3416
3417
  // Parse the specifier-qualifier-list piece.
3418
322
  DeclSpec DS(AttrFactory);
3419
322
  ParseSpecifierQualifierList(DS);
3420
3421
  // Parse the block-declarator.
3422
322
  Declarator DeclaratorInfo(DS, DeclaratorContext::BlockLiteral);
3423
322
  DeclaratorInfo.setFunctionDefinitionKind(FunctionDefinitionKind::Definition);
3424
322
  ParseDeclarator(DeclaratorInfo);
3425
3426
322
  MaybeParseGNUAttributes(DeclaratorInfo);
3427
3428
  // Inform sema that we are starting a block.
3429
322
  Actions.ActOnBlockArguments(CaretLoc, DeclaratorInfo, getCurScope());
3430
322
}
3431
3432
/// ParseBlockLiteralExpression - Parse a block literal, which roughly looks
3433
/// like ^(int x){ return x+1; }
3434
///
3435
/// \verbatim
3436
///         block-literal:
3437
/// [clang]   '^' block-args[opt] compound-statement
3438
/// [clang]   '^' block-id compound-statement
3439
/// [clang] block-args:
3440
/// [clang]   '(' parameter-list ')'
3441
/// \endverbatim
3442
2.86k
ExprResult Parser::ParseBlockLiteralExpression() {
3443
2.86k
  assert(Tok.is(tok::caret) && "block literal starts with ^");
3444
2.86k
  SourceLocation CaretLoc = ConsumeToken();
3445
3446
2.86k
  PrettyStackTraceLoc CrashInfo(PP.getSourceManager(), CaretLoc,
3447
2.86k
                                "block literal parsing");
3448
3449
  // Enter a scope to hold everything within the block.  This includes the
3450
  // argument decls, decls within the compound expression, etc.  This also
3451
  // allows determining whether a variable reference inside the block is
3452
  // within or outside of the block.
3453
2.86k
  ParseScope BlockScope(this, Scope::BlockScope | Scope::FnScope |
3454
2.86k
                                  Scope::CompoundStmtScope | Scope::DeclScope);
3455
3456
  // Inform sema that we are starting a block.
3457
2.86k
  Actions.ActOnBlockStart(CaretLoc, getCurScope());
3458
3459
  // Parse the return type if present.
3460
2.86k
  DeclSpec DS(AttrFactory);
3461
2.86k
  Declarator ParamInfo(DS, DeclaratorContext::BlockLiteral);
3462
2.86k
  ParamInfo.setFunctionDefinitionKind(FunctionDefinitionKind::Definition);
3463
  // FIXME: Since the return type isn't actually parsed, it can't be used to
3464
  // fill ParamInfo with an initial valid range, so do it manually.
3465
2.86k
  ParamInfo.SetSourceRange(SourceRange(Tok.getLocation(), Tok.getLocation()));
3466
3467
  // If this block has arguments, parse them.  There is no ambiguity here with
3468
  // the expression case, because the expression case requires a parameter list.
3469
2.86k
  if (Tok.is(tok::l_paren)) {
3470
968
    ParseParenDeclarator(ParamInfo);
3471
    // Parse the pieces after the identifier as if we had "int(...)".
3472
    // SetIdentifier sets the source range end, but in this case we're past
3473
    // that location.
3474
968
    SourceLocation Tmp = ParamInfo.getSourceRange().getEnd();
3475
968
    ParamInfo.SetIdentifier(nullptr, CaretLoc);
3476
968
    ParamInfo.SetRangeEnd(Tmp);
3477
968
    if (ParamInfo.isInvalidType()) {
3478
      // If there was an error parsing the arguments, they may have
3479
      // tried to use ^(x+y) which requires an argument list.  Just
3480
      // skip the whole block literal.
3481
0
      Actions.ActOnBlockError(CaretLoc, getCurScope());
3482
0
      return ExprError();
3483
0
    }
3484
3485
968
    MaybeParseGNUAttributes(ParamInfo);
3486
3487
    // Inform sema that we are starting a block.
3488
968
    Actions.ActOnBlockArguments(CaretLoc, ParamInfo, getCurScope());
3489
1.89k
  } else if (!Tok.is(tok::l_brace)) {
3490
323
    ParseBlockId(CaretLoc);
3491
1.57k
  } else {
3492
    // Otherwise, pretend we saw (void).
3493
1.57k
    SourceLocation NoLoc;
3494
1.57k
    ParamInfo.AddTypeInfo(
3495
1.57k
        DeclaratorChunk::getFunction(/*HasProto=*/true,
3496
1.57k
                                     /*IsAmbiguous=*/false,
3497
1.57k
                                     /*RParenLoc=*/NoLoc,
3498
1.57k
                                     /*ArgInfo=*/nullptr,
3499
1.57k
                                     /*NumParams=*/0,
3500
1.57k
                                     /*EllipsisLoc=*/NoLoc,
3501
1.57k
                                     /*RParenLoc=*/NoLoc,
3502
1.57k
                                     /*RefQualifierIsLvalueRef=*/true,
3503
1.57k
                                     /*RefQualifierLoc=*/NoLoc,
3504
1.57k
                                     /*MutableLoc=*/NoLoc, EST_None,
3505
1.57k
                                     /*ESpecRange=*/SourceRange(),
3506
1.57k
                                     /*Exceptions=*/nullptr,
3507
1.57k
                                     /*ExceptionRanges=*/nullptr,
3508
1.57k
                                     /*NumExceptions=*/0,
3509
1.57k
                                     /*NoexceptExpr=*/nullptr,
3510
1.57k
                                     /*ExceptionSpecTokens=*/nullptr,
3511
1.57k
                                     /*DeclsInPrototype=*/None, CaretLoc,
3512
1.57k
                                     CaretLoc, ParamInfo),
3513
1.57k
        CaretLoc);
3514
3515
1.57k
    MaybeParseGNUAttributes(ParamInfo);
3516
3517
    // Inform sema that we are starting a block.
3518
1.57k
    Actions.ActOnBlockArguments(CaretLoc, ParamInfo, getCurScope());
3519
1.57k
  }
3520
3521
3522
2.86k
  ExprResult Result(true);
3523
2.86k
  if (!Tok.is(tok::l_brace)) {
3524
    // Saw something like: ^expr
3525
131
    Diag(Tok, diag::err_expected_expression);
3526
131
    Actions.ActOnBlockError(CaretLoc, getCurScope());
3527
131
    return ExprError();
3528
131
  }
3529
3530
2.73k
  StmtResult Stmt(ParseCompoundStatementBody());
3531
2.73k
  BlockScope.Exit();
3532
2.73k
  if (!Stmt.isInvalid())
3533
2.73k
    Result = Actions.ActOnBlockStmtExpr(CaretLoc, Stmt.get(), getCurScope());
3534
0
  else
3535
0
    Actions.ActOnBlockError(CaretLoc, getCurScope());
3536
2.73k
  return Result;
3537
2.73k
}
3538
3539
/// ParseObjCBoolLiteral - This handles the objective-c Boolean literals.
3540
///
3541
///         '__objc_yes'
3542
///         '__objc_no'
3543
1.08k
ExprResult Parser::ParseObjCBoolLiteral() {
3544
1.08k
  tok::TokenKind Kind = Tok.getKind();
3545
1.08k
  return Actions.ActOnObjCBoolLiteral(ConsumeToken(), Kind);
3546
1.08k
}
3547
3548
/// Validate availability spec list, emitting diagnostics if necessary. Returns
3549
/// true if invalid.
3550
static bool CheckAvailabilitySpecList(Parser &P,
3551
84
                                      ArrayRef<AvailabilitySpec> AvailSpecs) {
3552
84
  llvm::SmallSet<StringRef, 4> Platforms;
3553
84
  bool HasOtherPlatformSpec = false;
3554
84
  bool Valid = true;
3555
175
  for (const auto &Spec : AvailSpecs) {
3556
175
    if (Spec.isOtherPlatformSpec()) {
3557
83
      if (HasOtherPlatformSpec) {
3558
0
        P.Diag(Spec.getBeginLoc(), diag::err_availability_query_repeated_star);
3559
0
        Valid = false;
3560
0
      }
3561
3562
83
      HasOtherPlatformSpec = true;
3563
83
      continue;
3564
83
    }
3565
3566
92
    bool Inserted = Platforms.insert(Spec.getPlatform()).second;
3567
92
    if (!Inserted) {
3568
      // Rule out multiple version specs referring to the same platform.
3569
      // For example, we emit an error for:
3570
      // @available(macos 10.10, macos 10.11, *)
3571
1
      StringRef Platform = Spec.getPlatform();
3572
1
      P.Diag(Spec.getBeginLoc(), diag::err_availability_query_repeated_platform)
3573
1
          << Spec.getEndLoc() << Platform;
3574
1
      Valid = false;
3575
1
    }
3576
92
  }
3577
3578
84
  if (!HasOtherPlatformSpec) {
3579
1
    SourceLocation InsertWildcardLoc = AvailSpecs.back().getEndLoc();
3580
1
    P.Diag(InsertWildcardLoc, diag::err_availability_query_wildcard_required)
3581
1
        << FixItHint::CreateInsertion(InsertWildcardLoc, ", *");
3582
1
    return true;
3583
1
  }
3584
3585
83
  return !Valid;
3586
83
}
3587
3588
/// Parse availability query specification.
3589
///
3590
///  availability-spec:
3591
///     '*'
3592
///     identifier version-tuple
3593
186
Optional<AvailabilitySpec> Parser::ParseAvailabilitySpec() {
3594
186
  if (Tok.is(tok::star)) {
3595
85
    return AvailabilitySpec(ConsumeToken());
3596
101
  } else {
3597
    // Parse the platform name.
3598
101
    if (Tok.is(tok::code_completion)) {
3599
2
      Actions.CodeCompleteAvailabilityPlatformName();
3600
2
      cutOffParsing();
3601
2
      return None;
3602
2
    }
3603
99
    if (Tok.isNot(tok::identifier)) {
3604
2
      Diag(Tok, diag::err_avail_query_expected_platform_name);
3605
2
      return None;
3606
2
    }
3607
3608
97
    IdentifierLoc *PlatformIdentifier = ParseIdentifierLoc();
3609
97
    SourceRange VersionRange;
3610
97
    VersionTuple Version = ParseVersionTuple(VersionRange);
3611
3612
97
    if (Version.empty())
3613
1
      return None;
3614
3615
96
    StringRef GivenPlatform = PlatformIdentifier->Ident->getName();
3616
96
    StringRef Platform =
3617
96
        AvailabilityAttr::canonicalizePlatformName(GivenPlatform);
3618
3619
96
    if (AvailabilityAttr::getPrettyPlatformName(Platform).empty()) {
3620
3
      Diag(PlatformIdentifier->Loc,
3621
3
           diag::err_avail_query_unrecognized_platform_name)
3622
3
          << GivenPlatform;
3623
3
      return None;
3624
3
    }
3625
3626
93
    return AvailabilitySpec(Version, Platform, PlatformIdentifier->Loc,
3627
93
                            VersionRange.getEnd());
3628
93
  }
3629
186
}
3630
3631
92
ExprResult Parser::ParseAvailabilityCheckExpr(SourceLocation BeginLoc) {
3632
92
  assert(Tok.is(tok::kw___builtin_available) ||
3633
92
         Tok.isObjCAtKeyword(tok::objc_available));
3634
3635
  // Eat the available or __builtin_available.
3636
92
  ConsumeToken();
3637
3638
92
  BalancedDelimiterTracker Parens(*this, tok::l_paren);
3639
92
  if (Parens.expectAndConsume())
3640
1
    return ExprError();
3641
3642
91
  SmallVector<AvailabilitySpec, 4> AvailSpecs;
3643
91
  bool HasError = false;
3644
186
  while (true) {
3645
186
    Optional<AvailabilitySpec> Spec = ParseAvailabilitySpec();
3646
186
    if (!Spec)
3647
8
      HasError = true;
3648
178
    else
3649
178
      AvailSpecs.push_back(*Spec);
3650
3651
186
    if (!TryConsumeToken(tok::comma))
3652
91
      break;
3653
186
  }
3654
3655
91
  if (HasError) {
3656
7
    SkipUntil(tok::r_paren, StopAtSemi);
3657
7
    return ExprError();
3658
7
  }
3659
3660
84
  CheckAvailabilitySpecList(*this, AvailSpecs);
3661
3662
84
  if (Parens.consumeClose())
3663
0
    return ExprError();
3664
3665
84
  return Actions.ActOnObjCAvailabilityCheckExpr(AvailSpecs, BeginLoc,
3666
84
                                                Parens.getCloseLocation());
3667
84
}