clang  15.0.0git
ParseInit.cpp
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1 //===--- ParseInit.cpp - Initializer 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 // This file implements initializer parsing as specified by C99 6.7.8.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "clang/Basic/TokenKinds.h"
15 #include "clang/Parse/Parser.h"
17 #include "clang/Sema/Designator.h"
18 #include "clang/Sema/Ownership.h"
19 #include "clang/Sema/Scope.h"
20 #include "llvm/ADT/STLExtras.h"
21 #include "llvm/ADT/SmallString.h"
22 using namespace clang;
23 
24 
25 /// MayBeDesignationStart - Return true if the current token might be the start
26 /// of a designator. If we can tell it is impossible that it is a designator,
27 /// return false.
28 bool Parser::MayBeDesignationStart() {
29  switch (Tok.getKind()) {
30  default:
31  return false;
32 
33  case tok::period: // designator: '.' identifier
34  return true;
35 
36  case tok::l_square: { // designator: array-designator
37  if (!PP.getLangOpts().CPlusPlus11)
38  return true;
39 
40  // C++11 lambda expressions and C99 designators can be ambiguous all the
41  // way through the closing ']' and to the next character. Handle the easy
42  // cases here, and fall back to tentative parsing if those fail.
43  switch (PP.LookAhead(0).getKind()) {
44  case tok::equal:
45  case tok::ellipsis:
46  case tok::r_square:
47  // Definitely starts a lambda expression.
48  return false;
49 
50  case tok::amp:
51  case tok::kw_this:
52  case tok::star:
53  case tok::identifier:
54  // We have to do additional analysis, because these could be the
55  // start of a constant expression or a lambda capture list.
56  break;
57 
58  default:
59  // Anything not mentioned above cannot occur following a '[' in a
60  // lambda expression.
61  return true;
62  }
63 
64  // Handle the complicated case below.
65  break;
66  }
67  case tok::identifier: // designation: identifier ':'
68  return PP.LookAhead(0).is(tok::colon);
69  }
70 
71  // Parse up to (at most) the token after the closing ']' to determine
72  // whether this is a C99 designator or a lambda.
73  RevertingTentativeParsingAction Tentative(*this);
74 
75  LambdaIntroducer Intro;
76  LambdaIntroducerTentativeParse ParseResult;
77  if (ParseLambdaIntroducer(Intro, &ParseResult)) {
78  // Hit and diagnosed an error in a lambda.
79  // FIXME: Tell the caller this happened so they can recover.
80  return true;
81  }
82 
83  switch (ParseResult) {
84  case LambdaIntroducerTentativeParse::Success:
85  case LambdaIntroducerTentativeParse::Incomplete:
86  // Might be a lambda-expression. Keep looking.
87  // FIXME: If our tentative parse was not incomplete, parse the lambda from
88  // here rather than throwing away then reparsing the LambdaIntroducer.
89  break;
90 
91  case LambdaIntroducerTentativeParse::MessageSend:
92  case LambdaIntroducerTentativeParse::Invalid:
93  // Can't be a lambda-expression. Treat it as a designator.
94  // FIXME: Should we disambiguate against a message-send?
95  return true;
96  }
97 
98  // Once we hit the closing square bracket, we look at the next
99  // token. If it's an '=', this is a designator. Otherwise, it's a
100  // lambda expression. This decision favors lambdas over the older
101  // GNU designator syntax, which allows one to omit the '=', but is
102  // consistent with GCC.
103  return Tok.is(tok::equal);
104 }
105 
107  Designation &Desig) {
108  // If we have exactly one array designator, this used the GNU
109  // 'designation: array-designator' extension, otherwise there should be no
110  // designators at all!
111  if (Desig.getNumDesignators() == 1 &&
112  (Desig.getDesignator(0).isArrayDesignator() ||
114  P.Diag(Loc, diag::ext_gnu_missing_equal_designator);
115  else if (Desig.getNumDesignators() > 0)
116  P.Diag(Loc, diag::err_expected_equal_designator);
117 }
118 
119 /// ParseInitializerWithPotentialDesignator - Parse the 'initializer' production
120 /// checking to see if the token stream starts with a designator.
121 ///
122 /// C99:
123 ///
124 /// designation:
125 /// designator-list '='
126 /// [GNU] array-designator
127 /// [GNU] identifier ':'
128 ///
129 /// designator-list:
130 /// designator
131 /// designator-list designator
132 ///
133 /// designator:
134 /// array-designator
135 /// '.' identifier
136 ///
137 /// array-designator:
138 /// '[' constant-expression ']'
139 /// [GNU] '[' constant-expression '...' constant-expression ']'
140 ///
141 /// C++20:
142 ///
143 /// designated-initializer-list:
144 /// designated-initializer-clause
145 /// designated-initializer-list ',' designated-initializer-clause
146 ///
147 /// designated-initializer-clause:
148 /// designator brace-or-equal-initializer
149 ///
150 /// designator:
151 /// '.' identifier
152 ///
153 /// We allow the C99 syntax extensions in C++20, but do not allow the C++20
154 /// extension (a braced-init-list after the designator with no '=') in C99.
155 ///
156 /// NOTE: [OBC] allows '[ objc-receiver objc-message-args ]' as an
157 /// initializer (because it is an expression). We need to consider this case
158 /// when parsing array designators.
159 ///
160 /// \p CodeCompleteCB is called with Designation parsed so far.
161 ExprResult Parser::ParseInitializerWithPotentialDesignator(
162  DesignatorCompletionInfo DesignatorCompletion) {
163  // If this is the old-style GNU extension:
164  // designation ::= identifier ':'
165  // Handle it as a field designator. Otherwise, this must be the start of a
166  // normal expression.
167  if (Tok.is(tok::identifier)) {
168  const IdentifierInfo *FieldName = Tok.getIdentifierInfo();
169 
170  SmallString<256> NewSyntax;
171  llvm::raw_svector_ostream(NewSyntax) << '.' << FieldName->getName()
172  << " = ";
173 
174  SourceLocation NameLoc = ConsumeToken(); // Eat the identifier.
175 
176  assert(Tok.is(tok::colon) && "MayBeDesignationStart not working properly!");
177  SourceLocation ColonLoc = ConsumeToken();
178 
179  Diag(NameLoc, diag::ext_gnu_old_style_field_designator)
180  << FixItHint::CreateReplacement(SourceRange(NameLoc, ColonLoc),
181  NewSyntax);
182 
183  Designation D;
184  D.AddDesignator(Designator::getField(FieldName, SourceLocation(), NameLoc));
185  PreferredType.enterDesignatedInitializer(
186  Tok.getLocation(), DesignatorCompletion.PreferredBaseType, D);
187  return Actions.ActOnDesignatedInitializer(D, ColonLoc, true,
188  ParseInitializer());
189  }
190 
191  // Desig - This is initialized when we see our first designator. We may have
192  // an objc message send with no designator, so we don't want to create this
193  // eagerly.
194  Designation Desig;
195 
196  // Parse each designator in the designator list until we find an initializer.
197  while (Tok.is(tok::period) || Tok.is(tok::l_square)) {
198  if (Tok.is(tok::period)) {
199  // designator: '.' identifier
200  SourceLocation DotLoc = ConsumeToken();
201 
202  if (Tok.is(tok::code_completion)) {
203  cutOffParsing();
204  Actions.CodeCompleteDesignator(DesignatorCompletion.PreferredBaseType,
205  DesignatorCompletion.InitExprs, Desig);
206  return ExprError();
207  }
208  if (Tok.isNot(tok::identifier)) {
209  Diag(Tok.getLocation(), diag::err_expected_field_designator);
210  return ExprError();
211  }
212 
214  Tok.getLocation()));
215  ConsumeToken(); // Eat the identifier.
216  continue;
217  }
218 
219  // We must have either an array designator now or an objc message send.
220  assert(Tok.is(tok::l_square) && "Unexpected token!");
221 
222  // Handle the two forms of array designator:
223  // array-designator: '[' constant-expression ']'
224  // array-designator: '[' constant-expression '...' constant-expression ']'
225  //
226  // Also, we have to handle the case where the expression after the
227  // designator an an objc message send: '[' objc-message-expr ']'.
228  // Interesting cases are:
229  // [foo bar] -> objc message send
230  // [foo] -> array designator
231  // [foo ... bar] -> array designator
232  // [4][foo bar] -> obsolete GNU designation with objc message send.
233  //
234  // We do not need to check for an expression starting with [[ here. If it
235  // contains an Objective-C message send, then it is not an ill-formed
236  // attribute. If it is a lambda-expression within an array-designator, then
237  // it will be rejected because a constant-expression cannot begin with a
238  // lambda-expression.
239  InMessageExpressionRAIIObject InMessage(*this, true);
240 
241  BalancedDelimiterTracker T(*this, tok::l_square);
242  T.consumeOpen();
243  SourceLocation StartLoc = T.getOpenLocation();
244 
245  ExprResult Idx;
246 
247  // If Objective-C is enabled and this is a typename (class message
248  // send) or send to 'super', parse this as a message send
249  // expression. We handle C++ and C separately, since C++ requires
250  // much more complicated parsing.
251  if (getLangOpts().ObjC && getLangOpts().CPlusPlus) {
252  // Send to 'super'.
253  if (Tok.is(tok::identifier) && Tok.getIdentifierInfo() == Ident_super &&
254  NextToken().isNot(tok::period) &&
255  getCurScope()->isInObjcMethodScope()) {
256  CheckArrayDesignatorSyntax(*this, StartLoc, Desig);
257  return ParseAssignmentExprWithObjCMessageExprStart(
258  StartLoc, ConsumeToken(), nullptr, nullptr);
259  }
260 
261  // Parse the receiver, which is either a type or an expression.
262  bool IsExpr;
263  void *TypeOrExpr;
264  if (ParseObjCXXMessageReceiver(IsExpr, TypeOrExpr)) {
265  SkipUntil(tok::r_square, StopAtSemi);
266  return ExprError();
267  }
268 
269  // If the receiver was a type, we have a class message; parse
270  // the rest of it.
271  if (!IsExpr) {
272  CheckArrayDesignatorSyntax(*this, StartLoc, Desig);
273  return ParseAssignmentExprWithObjCMessageExprStart(StartLoc,
274  SourceLocation(),
275  ParsedType::getFromOpaquePtr(TypeOrExpr),
276  nullptr);
277  }
278 
279  // If the receiver was an expression, we still don't know
280  // whether we have a message send or an array designator; just
281  // adopt the expression for further analysis below.
282  // FIXME: potentially-potentially evaluated expression above?
283  Idx = ExprResult(static_cast<Expr*>(TypeOrExpr));
284  } else if (getLangOpts().ObjC && Tok.is(tok::identifier)) {
285  IdentifierInfo *II = Tok.getIdentifierInfo();
286  SourceLocation IILoc = Tok.getLocation();
287  ParsedType ReceiverType;
288  // Three cases. This is a message send to a type: [type foo]
289  // This is a message send to super: [super foo]
290  // This is a message sent to an expr: [super.bar foo]
291  switch (Actions.getObjCMessageKind(
292  getCurScope(), II, IILoc, II == Ident_super,
293  NextToken().is(tok::period), ReceiverType)) {
295  CheckArrayDesignatorSyntax(*this, StartLoc, Desig);
296  return ParseAssignmentExprWithObjCMessageExprStart(
297  StartLoc, ConsumeToken(), nullptr, nullptr);
298 
300  CheckArrayDesignatorSyntax(*this, StartLoc, Desig);
301  ConsumeToken(); // the identifier
302  if (!ReceiverType) {
303  SkipUntil(tok::r_square, StopAtSemi);
304  return ExprError();
305  }
306 
307  // Parse type arguments and protocol qualifiers.
308  if (Tok.is(tok::less)) {
309  SourceLocation NewEndLoc;
310  TypeResult NewReceiverType
311  = parseObjCTypeArgsAndProtocolQualifiers(IILoc, ReceiverType,
312  /*consumeLastToken=*/true,
313  NewEndLoc);
314  if (!NewReceiverType.isUsable()) {
315  SkipUntil(tok::r_square, StopAtSemi);
316  return ExprError();
317  }
318 
319  ReceiverType = NewReceiverType.get();
320  }
321 
322  return ParseAssignmentExprWithObjCMessageExprStart(StartLoc,
323  SourceLocation(),
324  ReceiverType,
325  nullptr);
326 
328  // Fall through; we'll just parse the expression and
329  // (possibly) treat this like an Objective-C message send
330  // later.
331  break;
332  }
333  }
334 
335  // Parse the index expression, if we haven't already gotten one
336  // above (which can only happen in Objective-C++).
337  // Note that we parse this as an assignment expression, not a constant
338  // expression (allowing *=, =, etc) to handle the objc case. Sema needs
339  // to validate that the expression is a constant.
340  // FIXME: We also need to tell Sema that we're in a
341  // potentially-potentially evaluated context.
342  if (!Idx.get()) {
344  if (Idx.isInvalid()) {
345  SkipUntil(tok::r_square, StopAtSemi);
346  return Idx;
347  }
348  }
349 
350  // Given an expression, we could either have a designator (if the next
351  // tokens are '...' or ']' or an objc message send. If this is an objc
352  // message send, handle it now. An objc-message send is the start of
353  // an assignment-expression production.
354  if (getLangOpts().ObjC && Tok.isNot(tok::ellipsis) &&
355  Tok.isNot(tok::r_square)) {
356  CheckArrayDesignatorSyntax(*this, Tok.getLocation(), Desig);
357  return ParseAssignmentExprWithObjCMessageExprStart(
358  StartLoc, SourceLocation(), nullptr, Idx.get());
359  }
360 
361  // If this is a normal array designator, remember it.
362  if (Tok.isNot(tok::ellipsis)) {
363  Desig.AddDesignator(Designator::getArray(Idx.get(), StartLoc));
364  } else {
365  // Handle the gnu array range extension.
366  Diag(Tok, diag::ext_gnu_array_range);
367  SourceLocation EllipsisLoc = ConsumeToken();
368 
370  if (RHS.isInvalid()) {
371  SkipUntil(tok::r_square, StopAtSemi);
372  return RHS;
373  }
375  RHS.get(),
376  StartLoc, EllipsisLoc));
377  }
378 
379  T.consumeClose();
381  T.getCloseLocation());
382  }
383 
384  // Okay, we're done with the designator sequence. We know that there must be
385  // at least one designator, because the only case we can get into this method
386  // without a designator is when we have an objc message send. That case is
387  // handled and returned from above.
388  assert(!Desig.empty() && "Designator is empty?");
389 
390  // Handle a normal designator sequence end, which is an equal.
391  if (Tok.is(tok::equal)) {
392  SourceLocation EqualLoc = ConsumeToken();
393  PreferredType.enterDesignatedInitializer(
394  Tok.getLocation(), DesignatorCompletion.PreferredBaseType, Desig);
395  return Actions.ActOnDesignatedInitializer(Desig, EqualLoc, false,
396  ParseInitializer());
397  }
398 
399  // Handle a C++20 braced designated initialization, which results in
400  // direct-list-initialization of the aggregate element. We allow this as an
401  // extension from C++11 onwards (when direct-list-initialization was added).
402  if (Tok.is(tok::l_brace) && getLangOpts().CPlusPlus11) {
403  PreferredType.enterDesignatedInitializer(
404  Tok.getLocation(), DesignatorCompletion.PreferredBaseType, Desig);
405  return Actions.ActOnDesignatedInitializer(Desig, SourceLocation(), false,
406  ParseBraceInitializer());
407  }
408 
409  // We read some number of designators and found something that isn't an = or
410  // an initializer. If we have exactly one array designator, this
411  // is the GNU 'designation: array-designator' extension. Otherwise, it is a
412  // parse error.
413  if (Desig.getNumDesignators() == 1 &&
414  (Desig.getDesignator(0).isArrayDesignator() ||
416  Diag(Tok, diag::ext_gnu_missing_equal_designator)
417  << FixItHint::CreateInsertion(Tok.getLocation(), "= ");
418  return Actions.ActOnDesignatedInitializer(Desig, Tok.getLocation(),
419  true, ParseInitializer());
420  }
421 
422  Diag(Tok, diag::err_expected_equal_designator);
423  return ExprError();
424 }
425 
426 /// ParseBraceInitializer - Called when parsing an initializer that has a
427 /// leading open brace.
428 ///
429 /// initializer: [C99 6.7.8]
430 /// '{' initializer-list '}'
431 /// '{' initializer-list ',' '}'
432 /// [GNU] '{' '}'
433 ///
434 /// initializer-list:
435 /// designation[opt] initializer ...[opt]
436 /// initializer-list ',' designation[opt] initializer ...[opt]
437 ///
438 ExprResult Parser::ParseBraceInitializer() {
439  InMessageExpressionRAIIObject InMessage(*this, false);
440 
441  BalancedDelimiterTracker T(*this, tok::l_brace);
442  T.consumeOpen();
443  SourceLocation LBraceLoc = T.getOpenLocation();
444 
445  /// InitExprs - This is the actual list of expressions contained in the
446  /// initializer.
447  ExprVector InitExprs;
448 
449  if (Tok.is(tok::r_brace)) {
450  // Empty initializers are a C++ feature and a GNU extension to C.
451  if (!getLangOpts().CPlusPlus)
452  Diag(LBraceLoc, diag::ext_gnu_empty_initializer);
453  // Match the '}'.
454  return Actions.ActOnInitList(LBraceLoc, None, ConsumeBrace());
455  }
456 
457  // Enter an appropriate expression evaluation context for an initializer list.
460 
461  bool InitExprsOk = true;
462  QualType LikelyType = PreferredType.get(T.getOpenLocation());
463  DesignatorCompletionInfo DesignatorCompletion{InitExprs, LikelyType};
464  bool CalledSignatureHelp = false;
465  auto RunSignatureHelp = [&] {
466  QualType PreferredType;
467  if (!LikelyType.isNull())
468  PreferredType = Actions.ProduceConstructorSignatureHelp(
469  LikelyType->getCanonicalTypeInternal(), T.getOpenLocation(),
470  InitExprs, T.getOpenLocation(), /*Braced=*/true);
471  CalledSignatureHelp = true;
472  return PreferredType;
473  };
474 
475  while (true) {
476  PreferredType.enterFunctionArgument(Tok.getLocation(), RunSignatureHelp);
477 
478  // Handle Microsoft __if_exists/if_not_exists if necessary.
479  if (getLangOpts().MicrosoftExt && (Tok.is(tok::kw___if_exists) ||
480  Tok.is(tok::kw___if_not_exists))) {
481  if (ParseMicrosoftIfExistsBraceInitializer(InitExprs, InitExprsOk)) {
482  if (Tok.isNot(tok::comma)) break;
483  ConsumeToken();
484  }
485  if (Tok.is(tok::r_brace)) break;
486  continue;
487  }
488 
489  // Parse: designation[opt] initializer
490 
491  // If we know that this cannot be a designation, just parse the nested
492  // initializer directly.
493  ExprResult SubElt;
494  if (MayBeDesignationStart())
495  SubElt = ParseInitializerWithPotentialDesignator(DesignatorCompletion);
496  else
497  SubElt = ParseInitializer();
498 
499  if (Tok.is(tok::ellipsis))
500  SubElt = Actions.ActOnPackExpansion(SubElt.get(), ConsumeToken());
501 
502  SubElt = Actions.CorrectDelayedTyposInExpr(SubElt.get());
503 
504  // If we couldn't parse the subelement, bail out.
505  if (SubElt.isUsable()) {
506  InitExprs.push_back(SubElt.get());
507  } else {
508  InitExprsOk = false;
509 
510  // We have two ways to try to recover from this error: if the code looks
511  // grammatically ok (i.e. we have a comma coming up) try to continue
512  // parsing the rest of the initializer. This allows us to emit
513  // diagnostics for later elements that we find. If we don't see a comma,
514  // assume there is a parse error, and just skip to recover.
515  // FIXME: This comment doesn't sound right. If there is a r_brace
516  // immediately, it can't be an error, since there is no other way of
517  // leaving this loop except through this if.
518  if (Tok.isNot(tok::comma)) {
519  SkipUntil(tok::r_brace, StopBeforeMatch);
520  break;
521  }
522  }
523 
524  // If we don't have a comma continued list, we're done.
525  if (Tok.isNot(tok::comma)) break;
526 
527  // TODO: save comma locations if some client cares.
528  ConsumeToken();
529 
530  // Handle trailing comma.
531  if (Tok.is(tok::r_brace)) break;
532  }
533 
534  bool closed = !T.consumeClose();
535 
536  if (InitExprsOk && closed)
537  return Actions.ActOnInitList(LBraceLoc, InitExprs,
538  T.getCloseLocation());
539 
540  return ExprError(); // an error occurred.
541 }
542 
543 
544 // Return true if a comma (or closing brace) is necessary after the
545 // __if_exists/if_not_exists statement.
546 bool Parser::ParseMicrosoftIfExistsBraceInitializer(ExprVector &InitExprs,
547  bool &InitExprsOk) {
548  bool trailingComma = false;
549  IfExistsCondition Result;
550  if (ParseMicrosoftIfExistsCondition(Result))
551  return false;
552 
553  BalancedDelimiterTracker Braces(*this, tok::l_brace);
554  if (Braces.consumeOpen()) {
555  Diag(Tok, diag::err_expected) << tok::l_brace;
556  return false;
557  }
558 
559  switch (Result.Behavior) {
560  case IEB_Parse:
561  // Parse the declarations below.
562  break;
563 
564  case IEB_Dependent:
565  Diag(Result.KeywordLoc, diag::warn_microsoft_dependent_exists)
566  << Result.IsIfExists;
567  // Fall through to skip.
568  LLVM_FALLTHROUGH;
569 
570  case IEB_Skip:
571  Braces.skipToEnd();
572  return false;
573  }
574 
575  DesignatorCompletionInfo DesignatorCompletion{
576  InitExprs,
577  PreferredType.get(Braces.getOpenLocation()),
578  };
579  while (!isEofOrEom()) {
580  trailingComma = false;
581  // If we know that this cannot be a designation, just parse the nested
582  // initializer directly.
583  ExprResult SubElt;
584  if (MayBeDesignationStart())
585  SubElt = ParseInitializerWithPotentialDesignator(DesignatorCompletion);
586  else
587  SubElt = ParseInitializer();
588 
589  if (Tok.is(tok::ellipsis))
590  SubElt = Actions.ActOnPackExpansion(SubElt.get(), ConsumeToken());
591 
592  // If we couldn't parse the subelement, bail out.
593  if (!SubElt.isInvalid())
594  InitExprs.push_back(SubElt.get());
595  else
596  InitExprsOk = false;
597 
598  if (Tok.is(tok::comma)) {
599  ConsumeToken();
600  trailingComma = true;
601  }
602 
603  if (Tok.is(tok::r_brace))
604  break;
605  }
606 
607  Braces.consumeClose();
608 
609  return !trailingComma;
610 }
clang::Sema::ActOnInitList
ExprResult ActOnInitList(SourceLocation LBraceLoc, MultiExprArg InitArgList, SourceLocation RBraceLoc)
Definition: SemaExpr.cpp:7333
clang::LambdaIntroducer
Represents a complete lambda introducer.
Definition: DeclSpec.h:2710
clang::Sema::ObjCSuperMessage
@ ObjCSuperMessage
The message is sent to 'super'.
Definition: Sema.h:10092
clang::Preprocessor::LookAhead
const Token & LookAhead(unsigned N)
Peeks ahead N tokens and returns that token without consuming any tokens.
Definition: Preprocessor.h:1588
clang::SourceRange
A trivial tuple used to represent a source range.
Definition: SourceLocation.h:210
clang::FixItHint::CreateInsertion
static FixItHint CreateInsertion(SourceLocation InsertionLoc, StringRef Code, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code string at a specific location.
Definition: Diagnostic.h:97
clang::InMessageExpressionRAIIObject
Definition: RAIIObjectsForParser.h:328
clang::Parser::SkipUntil
bool SkipUntil(tok::TokenKind T, SkipUntilFlags Flags=static_cast< SkipUntilFlags >(0))
SkipUntil - Read tokens until we get to the specified token, then consume it (unless StopBeforeMatch ...
Definition: Parser.h:1219
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:86
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:731
Ownership.h
clang::Token::getIdentifierInfo
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:178
clang::Parser
Parser - This implements a parser for the C family of languages.
Definition: Parser.h:60
clang::Parser::ParseAssignmentExpression
ExprResult ParseAssignmentExpression(TypeCastState isTypeCast=NotTypeCast)
Parse an expr that doesn't include (top-level) commas.
Definition: ParseExpr.cpp:160
RAIIObjectsForParser.h
Designator.h
clang::BalancedDelimiterTracker
RAII class that helps handle the parsing of an open/close delimiter pair, such as braces { ....
Definition: RAIIObjectsForParser.h:388
clang::Designator::getArray
static Designator getArray(Expr *Index, SourceLocation LBracketLoc)
Definition: Designator.h:138
clang::Preprocessor::getLangOpts
const LangOptions & getLangOpts() const
Definition: Preprocessor.h:1006
clang::ExprError
ExprResult ExprError()
Definition: Ownership.h:278
TokenKinds.h
clang::PreferredTypeBuilder::get
QualType get(SourceLocation Tok) const
Get the expected type associated with this location, if any.
Definition: Sema.h:332
clang::Sema::ActOnDesignatedInitializer
ExprResult ActOnDesignatedInitializer(Designation &Desig, SourceLocation EqualOrColonLoc, bool GNUSyntax, ExprResult Init)
Definition: SemaInit.cpp:3204
clang::Token::getKind
tok::TokenKind getKind() const
Definition: Token.h:92
clang::ExprResult
ActionResult< Expr * > ExprResult
Definition: Ownership.h:262
clang::CPlusPlus
@ CPlusPlus
Definition: LangStandard.h:53
clang::Designator::getField
const IdentifierInfo * getField() const
Definition: Designator.h:75
clang::Parser::StopBeforeMatch
@ StopBeforeMatch
Stop skipping at specified token, but don't skip the token itself.
Definition: Parser.h:1200
clang::Designation::AddDesignator
void AddDesignator(Designator D)
AddDesignator - Add a designator to the end of this list.
Definition: Designator.h:191
clang::Parser::getLangOpts
const LangOptions & getLangOpts() const
Definition: Parser.h:440
clang::Designator::isArrayRangeDesignator
bool isArrayRangeDesignator() const
Definition: Designator.h:73
clang::Token::is
bool is(tok::TokenKind K) const
is/isNot - Predicates to check if this token is a specific kind, as in "if (Tok.is(tok::l_brace)) {....
Definition: Token.h:97
llvm::SmallString
Definition: LLVM.h:37
clang::Type::getCanonicalTypeInternal
QualType getCanonicalTypeInternal() const
Definition: Type.h:2527
clang::Parser::getCurScope
Scope * getCurScope() const
Definition: Parser.h:447
clang::Parser::Diag
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Definition: Parser.cpp:73
clang::Token::isNot
bool isNot(tok::TokenKind K) const
Definition: Token.h:98
clang::Designation::empty
bool empty() const
Definition: Designator.h:195
clang::Sema::CodeCompleteDesignator
void CodeCompleteDesignator(const QualType BaseType, llvm::ArrayRef< Expr * > InitExprs, const Designation &D)
Trigger code completion for a record of BaseType.
Definition: SemaCodeComplete.cpp:6345
clang::Parser::StopAtSemi
@ StopAtSemi
Stop skipping at semicolon.
Definition: Parser.h:1198
clang::OpaquePtr< QualType >
CheckArrayDesignatorSyntax
static void CheckArrayDesignatorSyntax(Parser &P, SourceLocation Loc, Designation &Desig)
Definition: ParseInit.cpp:106
clang::Parser::ParseConstantExpression
ExprResult ParseConstantExpression(TypeCastState isTypeCast=NotTypeCast)
Definition: ParseExpr.cpp:211
P
StringRef P
Definition: ASTMatchersInternal.cpp:563
clang::Parser::ConsumeToken
SourceLocation ConsumeToken()
ConsumeToken - Consume the current 'peek token' and lex the next one.
Definition: Parser.h:490
clang::ActionResult::get
PtrTy get() const
Definition: Ownership.h:169
clang::Designator::setRBracketLoc
void setRBracketLoc(SourceLocation RBracketLoc) const
Definition: Designator.h:164
clang::QualType::isNull
bool isNull() const
Return true if this QualType doesn't point to a type yet.
Definition: Type.h:796
Scope.h
clang::EnterExpressionEvaluationContext
RAII object that enters a new expression evaluation context.
Definition: Sema.h:13508
clang::ActionResult::isInvalid
bool isInvalid() const
Definition: Ownership.h:165
clang::Designation::getNumDesignators
unsigned getNumDesignators() const
Definition: Designator.h:197
clang::IdentifierInfo
One of these records is kept for each identifier that is lexed.
Definition: IdentifierTable.h:84
clang::Token::getLocation
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file.
Definition: Token.h:125
clang::Sema::ActOnPackExpansion
ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, SourceLocation EllipsisLoc)
Invoked when parsing a template argument followed by an ellipsis, which creates a pack expansion.
Definition: SemaTemplateVariadic.cpp:551
clang::ActionResult< Expr * >
clang::Sema::ObjCClassMessage
@ ObjCClassMessage
The message is a class message, and the identifier is a type name.
Definition: Sema.h:10097
clang::IdentifierInfo::getName
StringRef getName() const
Return the actual identifier string.
Definition: IdentifierTable.h:195
clang
Definition: CalledOnceCheck.h:17
clang::Sema::ObjCInstanceMessage
@ ObjCInstanceMessage
The message is an instance message.
Definition: Sema.h:10094
clang::Designation
Designation - Represent a full designation, which is a sequence of designators.
Definition: Designator.h:185
clang::Sema::getObjCMessageKind
ObjCMessageKind getObjCMessageKind(Scope *S, IdentifierInfo *Name, SourceLocation NameLoc, bool IsSuper, bool HasTrailingDot, ParsedType &ReceiverType)
Definition: SemaExprObjC.cpp:2284
clang::PreferredTypeBuilder::enterDesignatedInitializer
void enterDesignatedInitializer(SourceLocation Tok, QualType BaseType, const Designation &D)
Handles e.g. BaseType{ .D = Tok...
Definition: SemaCodeComplete.cpp:417
ParseDiagnostic.h
clang::Designator::getArrayRange
static Designator getArrayRange(Expr *Start, Expr *End, SourceLocation LBracketLoc, SourceLocation EllipsisLoc)
Definition: Designator.h:149
clang::Sema::ProduceConstructorSignatureHelp
QualType ProduceConstructorSignatureHelp(QualType Type, SourceLocation Loc, ArrayRef< Expr * > Args, SourceLocation OpenParLoc, bool Braced)
Definition: SemaCodeComplete.cpp:6170
clang::CPlusPlus11
@ CPlusPlus11
Definition: LangStandard.h:54
clang::Designation::getDesignator
const Designator & getDesignator(unsigned Idx) const
Definition: Designator.h:198
clang::Expr
This represents one expression.
Definition: Expr.h:109
clang::OpaquePtr< QualType >::getFromOpaquePtr
static OpaquePtr getFromOpaquePtr(void *P)
Definition: Ownership.h:91
clang::EnterExpressionEvaluationContext::InitList
@ InitList
Definition: Sema.h:13534
clang::Parser::NextToken
const Token & NextToken()
NextToken - This peeks ahead one token and returns it without consuming it.
Definition: Parser.h:807
clang::Designator::isArrayDesignator
bool isArrayDesignator() const
Definition: Designator.h:72
clang::ActionResult::isUsable
bool isUsable() const
Definition: Ownership.h:166
clang::FixItHint::CreateReplacement
static FixItHint CreateReplacement(CharSourceRange RemoveRange, StringRef Code)
Create a code modification hint that replaces the given source range with the given code string.
Definition: Diagnostic.h:134
clang::Sema::CorrectDelayedTyposInExpr
ExprResult CorrectDelayedTyposInExpr(Expr *E, VarDecl *InitDecl=nullptr, bool RecoverUncorrectedTypos=false, llvm::function_ref< ExprResult(Expr *)> Filter=[](Expr *E) -> ExprResult { return E;})
Process any TypoExprs in the given Expr and its children, generating diagnostics as appropriate and r...
Definition: SemaExprCXX.cpp:8680
Parser.h