clang  10.0.0svn
ParseObjc.cpp
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1 //===--- ParseObjC.cpp - Objective C 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 the Objective-C portions of the Parser interface.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "clang/Parse/Parser.h"
14 #include "clang/AST/ASTContext.h"
16 #include "clang/Basic/CharInfo.h"
19 #include "clang/Sema/DeclSpec.h"
20 #include "clang/Sema/Scope.h"
21 #include "llvm/ADT/SmallVector.h"
22 #include "llvm/ADT/StringExtras.h"
23 
24 using namespace clang;
25 
26 /// Skips attributes after an Objective-C @ directive. Emits a diagnostic.
27 void Parser::MaybeSkipAttributes(tok::ObjCKeywordKind Kind) {
28  ParsedAttributes attrs(AttrFactory);
29  if (Tok.is(tok::kw___attribute)) {
30  if (Kind == tok::objc_interface || Kind == tok::objc_protocol)
31  Diag(Tok, diag::err_objc_postfix_attribute_hint)
32  << (Kind == tok::objc_protocol);
33  else
34  Diag(Tok, diag::err_objc_postfix_attribute);
35  ParseGNUAttributes(attrs);
36  }
37 }
38 
39 /// ParseObjCAtDirectives - Handle parts of the external-declaration production:
40 /// external-declaration: [C99 6.9]
41 /// [OBJC] objc-class-definition
42 /// [OBJC] objc-class-declaration
43 /// [OBJC] objc-alias-declaration
44 /// [OBJC] objc-protocol-definition
45 /// [OBJC] objc-method-definition
46 /// [OBJC] '@' 'end'
48 Parser::ParseObjCAtDirectives(ParsedAttributesWithRange &Attrs) {
49  SourceLocation AtLoc = ConsumeToken(); // the "@"
50 
51  if (Tok.is(tok::code_completion)) {
53  cutOffParsing();
54  return nullptr;
55  }
56 
57  Decl *SingleDecl = nullptr;
58  switch (Tok.getObjCKeywordID()) {
59  case tok::objc_class:
60  return ParseObjCAtClassDeclaration(AtLoc);
61  case tok::objc_interface:
62  SingleDecl = ParseObjCAtInterfaceDeclaration(AtLoc, Attrs);
63  break;
64  case tok::objc_protocol:
65  return ParseObjCAtProtocolDeclaration(AtLoc, Attrs);
66  case tok::objc_implementation:
67  return ParseObjCAtImplementationDeclaration(AtLoc, Attrs);
68  case tok::objc_end:
69  return ParseObjCAtEndDeclaration(AtLoc);
70  case tok::objc_compatibility_alias:
71  SingleDecl = ParseObjCAtAliasDeclaration(AtLoc);
72  break;
73  case tok::objc_synthesize:
74  SingleDecl = ParseObjCPropertySynthesize(AtLoc);
75  break;
76  case tok::objc_dynamic:
77  SingleDecl = ParseObjCPropertyDynamic(AtLoc);
78  break;
79  case tok::objc_import:
80  if (getLangOpts().Modules || getLangOpts().DebuggerSupport) {
81  SingleDecl = ParseModuleImport(AtLoc);
82  break;
83  }
84  Diag(AtLoc, diag::err_atimport);
85  SkipUntil(tok::semi);
86  return Actions.ConvertDeclToDeclGroup(nullptr);
87  default:
88  Diag(AtLoc, diag::err_unexpected_at);
89  SkipUntil(tok::semi);
90  SingleDecl = nullptr;
91  break;
92  }
93  return Actions.ConvertDeclToDeclGroup(SingleDecl);
94 }
95 
96 /// Class to handle popping type parameters when leaving the scope.
98  Sema &Actions;
99  Scope *S;
100  ObjCTypeParamList *Params;
101 
102 public:
104  : Actions(Actions), S(S), Params(nullptr) {}
105 
107  leave();
108  }
109 
111  assert(!Params);
112  Params = P;
113  }
114 
115  void leave() {
116  if (Params)
117  Actions.popObjCTypeParamList(S, Params);
118  Params = nullptr;
119  }
120 };
121 
122 ///
123 /// objc-class-declaration:
124 /// '@' 'class' objc-class-forward-decl (',' objc-class-forward-decl)* ';'
125 ///
126 /// objc-class-forward-decl:
127 /// identifier objc-type-parameter-list[opt]
128 ///
130 Parser::ParseObjCAtClassDeclaration(SourceLocation atLoc) {
131  ConsumeToken(); // the identifier "class"
134  SmallVector<ObjCTypeParamList *, 8> ClassTypeParams;
135 
136  while (1) {
137  MaybeSkipAttributes(tok::objc_class);
138  if (expectIdentifier()) {
139  SkipUntil(tok::semi);
140  return Actions.ConvertDeclToDeclGroup(nullptr);
141  }
142  ClassNames.push_back(Tok.getIdentifierInfo());
143  ClassLocs.push_back(Tok.getLocation());
144  ConsumeToken();
145 
146  // Parse the optional objc-type-parameter-list.
147  ObjCTypeParamList *TypeParams = nullptr;
148  if (Tok.is(tok::less))
149  TypeParams = parseObjCTypeParamList();
150  ClassTypeParams.push_back(TypeParams);
151  if (!TryConsumeToken(tok::comma))
152  break;
153  }
154 
155  // Consume the ';'.
156  if (ExpectAndConsume(tok::semi, diag::err_expected_after, "@class"))
157  return Actions.ConvertDeclToDeclGroup(nullptr);
158 
159  return Actions.ActOnForwardClassDeclaration(atLoc, ClassNames.data(),
160  ClassLocs.data(),
161  ClassTypeParams,
162  ClassNames.size());
163 }
164 
165 void Parser::CheckNestedObjCContexts(SourceLocation AtLoc)
166 {
167  Sema::ObjCContainerKind ock = Actions.getObjCContainerKind();
168  if (ock == Sema::OCK_None)
169  return;
170 
171  Decl *Decl = Actions.getObjCDeclContext();
172  if (CurParsedObjCImpl) {
173  CurParsedObjCImpl->finish(AtLoc);
174  } else {
175  Actions.ActOnAtEnd(getCurScope(), AtLoc);
176  }
177  Diag(AtLoc, diag::err_objc_missing_end)
178  << FixItHint::CreateInsertion(AtLoc, "@end\n");
179  if (Decl)
180  Diag(Decl->getBeginLoc(), diag::note_objc_container_start) << (int)ock;
181 }
182 
183 ///
184 /// objc-interface:
185 /// objc-class-interface-attributes[opt] objc-class-interface
186 /// objc-category-interface
187 ///
188 /// objc-class-interface:
189 /// '@' 'interface' identifier objc-type-parameter-list[opt]
190 /// objc-superclass[opt] objc-protocol-refs[opt]
191 /// objc-class-instance-variables[opt]
192 /// objc-interface-decl-list
193 /// @end
194 ///
195 /// objc-category-interface:
196 /// '@' 'interface' identifier objc-type-parameter-list[opt]
197 /// '(' identifier[opt] ')' objc-protocol-refs[opt]
198 /// objc-interface-decl-list
199 /// @end
200 ///
201 /// objc-superclass:
202 /// ':' identifier objc-type-arguments[opt]
203 ///
204 /// objc-class-interface-attributes:
205 /// __attribute__((visibility("default")))
206 /// __attribute__((visibility("hidden")))
207 /// __attribute__((deprecated))
208 /// __attribute__((unavailable))
209 /// __attribute__((objc_exception)) - used by NSException on 64-bit
210 /// __attribute__((objc_root_class))
211 ///
212 Decl *Parser::ParseObjCAtInterfaceDeclaration(SourceLocation AtLoc,
213  ParsedAttributes &attrs) {
214  assert(Tok.isObjCAtKeyword(tok::objc_interface) &&
215  "ParseObjCAtInterfaceDeclaration(): Expected @interface");
216  CheckNestedObjCContexts(AtLoc);
217  ConsumeToken(); // the "interface" identifier
218 
219  // Code completion after '@interface'.
220  if (Tok.is(tok::code_completion)) {
221  Actions.CodeCompleteObjCInterfaceDecl(getCurScope());
222  cutOffParsing();
223  return nullptr;
224  }
225 
226  MaybeSkipAttributes(tok::objc_interface);
227 
228  if (expectIdentifier())
229  return nullptr; // missing class or category name.
230 
231  // We have a class or category name - consume it.
232  IdentifierInfo *nameId = Tok.getIdentifierInfo();
233  SourceLocation nameLoc = ConsumeToken();
234 
235  // Parse the objc-type-parameter-list or objc-protocol-refs. For the latter
236  // case, LAngleLoc will be valid and ProtocolIdents will capture the
237  // protocol references (that have not yet been resolved).
238  SourceLocation LAngleLoc, EndProtoLoc;
239  SmallVector<IdentifierLocPair, 8> ProtocolIdents;
240  ObjCTypeParamList *typeParameterList = nullptr;
241  ObjCTypeParamListScope typeParamScope(Actions, getCurScope());
242  if (Tok.is(tok::less))
243  typeParameterList = parseObjCTypeParamListOrProtocolRefs(
244  typeParamScope, LAngleLoc, ProtocolIdents, EndProtoLoc);
245 
246  if (Tok.is(tok::l_paren) &&
247  !isKnownToBeTypeSpecifier(GetLookAheadToken(1))) { // we have a category.
248 
249  BalancedDelimiterTracker T(*this, tok::l_paren);
250  T.consumeOpen();
251 
252  SourceLocation categoryLoc;
253  IdentifierInfo *categoryId = nullptr;
254  if (Tok.is(tok::code_completion)) {
255  Actions.CodeCompleteObjCInterfaceCategory(getCurScope(), nameId, nameLoc);
256  cutOffParsing();
257  return nullptr;
258  }
259 
260  // For ObjC2, the category name is optional (not an error).
261  if (Tok.is(tok::identifier)) {
262  categoryId = Tok.getIdentifierInfo();
263  categoryLoc = ConsumeToken();
264  }
265  else if (!getLangOpts().ObjC) {
266  Diag(Tok, diag::err_expected)
267  << tok::identifier; // missing category name.
268  return nullptr;
269  }
270 
271  T.consumeClose();
272  if (T.getCloseLocation().isInvalid())
273  return nullptr;
274 
275  // Next, we need to check for any protocol references.
276  assert(LAngleLoc.isInvalid() && "Cannot have already parsed protocols");
277  SmallVector<Decl *, 8> ProtocolRefs;
278  SmallVector<SourceLocation, 8> ProtocolLocs;
279  if (Tok.is(tok::less) &&
280  ParseObjCProtocolReferences(ProtocolRefs, ProtocolLocs, true, true,
281  LAngleLoc, EndProtoLoc,
282  /*consumeLastToken=*/true))
283  return nullptr;
284 
285  Decl *CategoryType = Actions.ActOnStartCategoryInterface(
286  AtLoc, nameId, nameLoc, typeParameterList, categoryId, categoryLoc,
287  ProtocolRefs.data(), ProtocolRefs.size(), ProtocolLocs.data(),
288  EndProtoLoc, attrs);
289 
290  if (Tok.is(tok::l_brace))
291  ParseObjCClassInstanceVariables(CategoryType, tok::objc_private, AtLoc);
292 
293  ParseObjCInterfaceDeclList(tok::objc_not_keyword, CategoryType);
294 
295  return CategoryType;
296  }
297  // Parse a class interface.
298  IdentifierInfo *superClassId = nullptr;
299  SourceLocation superClassLoc;
300  SourceLocation typeArgsLAngleLoc;
302  SourceLocation typeArgsRAngleLoc;
303  SmallVector<Decl *, 4> protocols;
304  SmallVector<SourceLocation, 4> protocolLocs;
305  if (Tok.is(tok::colon)) { // a super class is specified.
306  ConsumeToken();
307 
308  // Code completion of superclass names.
309  if (Tok.is(tok::code_completion)) {
310  Actions.CodeCompleteObjCSuperclass(getCurScope(), nameId, nameLoc);
311  cutOffParsing();
312  return nullptr;
313  }
314 
315  if (expectIdentifier())
316  return nullptr; // missing super class name.
317  superClassId = Tok.getIdentifierInfo();
318  superClassLoc = ConsumeToken();
319 
320  // Type arguments for the superclass or protocol conformances.
321  if (Tok.is(tok::less)) {
322  parseObjCTypeArgsOrProtocolQualifiers(
323  nullptr, typeArgsLAngleLoc, typeArgs, typeArgsRAngleLoc, LAngleLoc,
324  protocols, protocolLocs, EndProtoLoc,
325  /*consumeLastToken=*/true,
326  /*warnOnIncompleteProtocols=*/true);
327  if (Tok.is(tok::eof))
328  return nullptr;
329  }
330  }
331 
332  // Next, we need to check for any protocol references.
333  if (LAngleLoc.isValid()) {
334  if (!ProtocolIdents.empty()) {
335  // We already parsed the protocols named when we thought we had a
336  // type parameter list. Translate them into actual protocol references.
337  for (const auto &pair : ProtocolIdents) {
338  protocolLocs.push_back(pair.second);
339  }
340  Actions.FindProtocolDeclaration(/*WarnOnDeclarations=*/true,
341  /*ForObjCContainer=*/true,
342  ProtocolIdents, protocols);
343  }
344  } else if (protocols.empty() && Tok.is(tok::less) &&
345  ParseObjCProtocolReferences(protocols, protocolLocs, true, true,
346  LAngleLoc, EndProtoLoc,
347  /*consumeLastToken=*/true)) {
348  return nullptr;
349  }
350 
351  if (Tok.isNot(tok::less))
352  Actions.ActOnTypedefedProtocols(protocols, protocolLocs,
353  superClassId, superClassLoc);
354 
355  Decl *ClsType = Actions.ActOnStartClassInterface(
356  getCurScope(), AtLoc, nameId, nameLoc, typeParameterList, superClassId,
357  superClassLoc, typeArgs,
358  SourceRange(typeArgsLAngleLoc, typeArgsRAngleLoc), protocols.data(),
359  protocols.size(), protocolLocs.data(), EndProtoLoc, attrs);
360 
361  if (Tok.is(tok::l_brace))
362  ParseObjCClassInstanceVariables(ClsType, tok::objc_protected, AtLoc);
363 
364  ParseObjCInterfaceDeclList(tok::objc_interface, ClsType);
365 
366  return ClsType;
367 }
368 
369 /// Add an attribute for a context-sensitive type nullability to the given
370 /// declarator.
372  Declarator &D,
373  NullabilityKind nullability,
374  SourceLocation nullabilityLoc,
375  bool &addedToDeclSpec) {
376  // Create the attribute.
377  auto getNullabilityAttr = [&](AttributePool &Pool) -> ParsedAttr * {
378  return Pool.create(P.getNullabilityKeyword(nullability),
379  SourceRange(nullabilityLoc), nullptr, SourceLocation(),
381  };
382 
383  if (D.getNumTypeObjects() > 0) {
384  // Add the attribute to the declarator chunk nearest the declarator.
386  getNullabilityAttr(D.getAttributePool()));
387  } else if (!addedToDeclSpec) {
388  // Otherwise, just put it on the declaration specifiers (if one
389  // isn't there already).
391  getNullabilityAttr(D.getMutableDeclSpec().getAttributes().getPool()));
392  addedToDeclSpec = true;
393  }
394 }
395 
396 /// Parse an Objective-C type parameter list, if present, or capture
397 /// the locations of the protocol identifiers for a list of protocol
398 /// references.
399 ///
400 /// objc-type-parameter-list:
401 /// '<' objc-type-parameter (',' objc-type-parameter)* '>'
402 ///
403 /// objc-type-parameter:
404 /// objc-type-parameter-variance? identifier objc-type-parameter-bound[opt]
405 ///
406 /// objc-type-parameter-bound:
407 /// ':' type-name
408 ///
409 /// objc-type-parameter-variance:
410 /// '__covariant'
411 /// '__contravariant'
412 ///
413 /// \param lAngleLoc The location of the starting '<'.
414 ///
415 /// \param protocolIdents Will capture the list of identifiers, if the
416 /// angle brackets contain a list of protocol references rather than a
417 /// type parameter list.
418 ///
419 /// \param rAngleLoc The location of the ending '>'.
420 ObjCTypeParamList *Parser::parseObjCTypeParamListOrProtocolRefs(
421  ObjCTypeParamListScope &Scope, SourceLocation &lAngleLoc,
422  SmallVectorImpl<IdentifierLocPair> &protocolIdents,
423  SourceLocation &rAngleLoc, bool mayBeProtocolList) {
424  assert(Tok.is(tok::less) && "Not at the beginning of a type parameter list");
425 
426  // Within the type parameter list, don't treat '>' as an operator.
427  GreaterThanIsOperatorScope G(GreaterThanIsOperator, false);
428 
429  // Local function to "flush" the protocol identifiers, turning them into
430  // type parameters.
431  SmallVector<Decl *, 4> typeParams;
432  auto makeProtocolIdentsIntoTypeParameters = [&]() {
433  unsigned index = 0;
434  for (const auto &pair : protocolIdents) {
435  DeclResult typeParam = Actions.actOnObjCTypeParam(
437  index++, pair.first, pair.second, SourceLocation(), nullptr);
438  if (typeParam.isUsable())
439  typeParams.push_back(typeParam.get());
440  }
441 
442  protocolIdents.clear();
443  mayBeProtocolList = false;
444  };
445 
446  bool invalid = false;
447  lAngleLoc = ConsumeToken();
448 
449  do {
450  // Parse the variance, if any.
451  SourceLocation varianceLoc;
453  if (Tok.is(tok::kw___covariant) || Tok.is(tok::kw___contravariant)) {
454  variance = Tok.is(tok::kw___covariant)
457  varianceLoc = ConsumeToken();
458 
459  // Once we've seen a variance specific , we know this is not a
460  // list of protocol references.
461  if (mayBeProtocolList) {
462  // Up until now, we have been queuing up parameters because they
463  // might be protocol references. Turn them into parameters now.
464  makeProtocolIdentsIntoTypeParameters();
465  }
466  }
467 
468  // Parse the identifier.
469  if (!Tok.is(tok::identifier)) {
470  // Code completion.
471  if (Tok.is(tok::code_completion)) {
472  // FIXME: If these aren't protocol references, we'll need different
473  // completions.
474  Actions.CodeCompleteObjCProtocolReferences(protocolIdents);
475  cutOffParsing();
476 
477  // FIXME: Better recovery here?.
478  return nullptr;
479  }
480 
481  Diag(Tok, diag::err_objc_expected_type_parameter);
482  invalid = true;
483  break;
484  }
485 
486  IdentifierInfo *paramName = Tok.getIdentifierInfo();
487  SourceLocation paramLoc = ConsumeToken();
488 
489  // If there is a bound, parse it.
490  SourceLocation colonLoc;
491  TypeResult boundType;
492  if (TryConsumeToken(tok::colon, colonLoc)) {
493  // Once we've seen a bound, we know this is not a list of protocol
494  // references.
495  if (mayBeProtocolList) {
496  // Up until now, we have been queuing up parameters because they
497  // might be protocol references. Turn them into parameters now.
498  makeProtocolIdentsIntoTypeParameters();
499  }
500 
501  // type-name
502  boundType = ParseTypeName();
503  if (boundType.isInvalid())
504  invalid = true;
505  } else if (mayBeProtocolList) {
506  // If this could still be a protocol list, just capture the identifier.
507  // We don't want to turn it into a parameter.
508  protocolIdents.push_back(std::make_pair(paramName, paramLoc));
509  continue;
510  }
511 
512  // Create the type parameter.
513  DeclResult typeParam = Actions.actOnObjCTypeParam(
514  getCurScope(), variance, varianceLoc, typeParams.size(), paramName,
515  paramLoc, colonLoc, boundType.isUsable() ? boundType.get() : nullptr);
516  if (typeParam.isUsable())
517  typeParams.push_back(typeParam.get());
518  } while (TryConsumeToken(tok::comma));
519 
520  // Parse the '>'.
521  if (invalid) {
522  SkipUntil(tok::greater, tok::at, StopBeforeMatch);
523  if (Tok.is(tok::greater))
524  ConsumeToken();
525  } else if (ParseGreaterThanInTemplateList(rAngleLoc,
526  /*ConsumeLastToken=*/true,
527  /*ObjCGenericList=*/true)) {
528  Diag(lAngleLoc, diag::note_matching) << "'<'";
529  SkipUntil({tok::greater, tok::greaterequal, tok::at, tok::minus,
530  tok::minus, tok::plus, tok::colon, tok::l_paren, tok::l_brace,
531  tok::comma, tok::semi },
533  if (Tok.is(tok::greater))
534  ConsumeToken();
535  }
536 
537  if (mayBeProtocolList) {
538  // A type parameter list must be followed by either a ':' (indicating the
539  // presence of a superclass) or a '(' (indicating that this is a category
540  // or extension). This disambiguates between an objc-type-parameter-list
541  // and a objc-protocol-refs.
542  if (Tok.isNot(tok::colon) && Tok.isNot(tok::l_paren)) {
543  // Returning null indicates that we don't have a type parameter list.
544  // The results the caller needs to handle the protocol references are
545  // captured in the reference parameters already.
546  return nullptr;
547  }
548 
549  // We have a type parameter list that looks like a list of protocol
550  // references. Turn that parameter list into type parameters.
551  makeProtocolIdentsIntoTypeParameters();
552  }
553 
554  // Form the type parameter list and enter its scope.
555  ObjCTypeParamList *list = Actions.actOnObjCTypeParamList(
556  getCurScope(),
557  lAngleLoc,
558  typeParams,
559  rAngleLoc);
560  Scope.enter(list);
561 
562  // Clear out the angle locations; they're used by the caller to indicate
563  // whether there are any protocol references.
564  lAngleLoc = SourceLocation();
565  rAngleLoc = SourceLocation();
566  return invalid ? nullptr : list;
567 }
568 
569 /// Parse an objc-type-parameter-list.
570 ObjCTypeParamList *Parser::parseObjCTypeParamList() {
571  SourceLocation lAngleLoc;
572  SmallVector<IdentifierLocPair, 1> protocolIdents;
573  SourceLocation rAngleLoc;
574 
575  ObjCTypeParamListScope Scope(Actions, getCurScope());
576  return parseObjCTypeParamListOrProtocolRefs(Scope, lAngleLoc, protocolIdents,
577  rAngleLoc,
578  /*mayBeProtocolList=*/false);
579 }
580 
581 /// objc-interface-decl-list:
582 /// empty
583 /// objc-interface-decl-list objc-property-decl [OBJC2]
584 /// objc-interface-decl-list objc-method-requirement [OBJC2]
585 /// objc-interface-decl-list objc-method-proto ';'
586 /// objc-interface-decl-list declaration
587 /// objc-interface-decl-list ';'
588 ///
589 /// objc-method-requirement: [OBJC2]
590 /// @required
591 /// @optional
592 ///
593 void Parser::ParseObjCInterfaceDeclList(tok::ObjCKeywordKind contextKey,
594  Decl *CDecl) {
595  SmallVector<Decl *, 32> allMethods;
596  SmallVector<DeclGroupPtrTy, 8> allTUVariables;
597  tok::ObjCKeywordKind MethodImplKind = tok::objc_not_keyword;
598 
599  SourceRange AtEnd;
600 
601  while (1) {
602  // If this is a method prototype, parse it.
603  if (Tok.isOneOf(tok::minus, tok::plus)) {
604  if (Decl *methodPrototype =
605  ParseObjCMethodPrototype(MethodImplKind, false))
606  allMethods.push_back(methodPrototype);
607  // Consume the ';' here, since ParseObjCMethodPrototype() is re-used for
608  // method definitions.
609  if (ExpectAndConsumeSemi(diag::err_expected_semi_after_method_proto)) {
610  // We didn't find a semi and we error'ed out. Skip until a ';' or '@'.
612  if (Tok.is(tok::semi))
613  ConsumeToken();
614  }
615  continue;
616  }
617  if (Tok.is(tok::l_paren)) {
618  Diag(Tok, diag::err_expected_minus_or_plus);
619  ParseObjCMethodDecl(Tok.getLocation(),
620  tok::minus,
621  MethodImplKind, false);
622  continue;
623  }
624  // Ignore excess semicolons.
625  if (Tok.is(tok::semi)) {
626  // FIXME: This should use ConsumeExtraSemi() for extraneous semicolons,
627  // to make -Wextra-semi diagnose them.
628  ConsumeToken();
629  continue;
630  }
631 
632  // If we got to the end of the file, exit the loop.
633  if (isEofOrEom())
634  break;
635 
636  // Code completion within an Objective-C interface.
637  if (Tok.is(tok::code_completion)) {
638  Actions.CodeCompleteOrdinaryName(getCurScope(),
639  CurParsedObjCImpl? Sema::PCC_ObjCImplementation
641  return cutOffParsing();
642  }
643 
644  // If we don't have an @ directive, parse it as a function definition.
645  if (Tok.isNot(tok::at)) {
646  // The code below does not consume '}'s because it is afraid of eating the
647  // end of a namespace. Because of the way this code is structured, an
648  // erroneous r_brace would cause an infinite loop if not handled here.
649  if (Tok.is(tok::r_brace))
650  break;
651 
652  ParsedAttributesWithRange attrs(AttrFactory);
653 
654  // Since we call ParseDeclarationOrFunctionDefinition() instead of
655  // ParseExternalDeclaration() below (so that this doesn't parse nested
656  // @interfaces), this needs to duplicate some code from the latter.
657  if (Tok.isOneOf(tok::kw_static_assert, tok::kw__Static_assert)) {
658  SourceLocation DeclEnd;
659  allTUVariables.push_back(
660  ParseDeclaration(DeclaratorContext::FileContext, DeclEnd, attrs));
661  continue;
662  }
663 
664  allTUVariables.push_back(ParseDeclarationOrFunctionDefinition(attrs));
665  continue;
666  }
667 
668  // Otherwise, we have an @ directive, eat the @.
669  SourceLocation AtLoc = ConsumeToken(); // the "@"
670  if (Tok.is(tok::code_completion)) {
671  Actions.CodeCompleteObjCAtDirective(getCurScope());
672  return cutOffParsing();
673  }
674 
675  tok::ObjCKeywordKind DirectiveKind = Tok.getObjCKeywordID();
676 
677  if (DirectiveKind == tok::objc_end) { // @end -> terminate list
678  AtEnd.setBegin(AtLoc);
679  AtEnd.setEnd(Tok.getLocation());
680  break;
681  } else if (DirectiveKind == tok::objc_not_keyword) {
682  Diag(Tok, diag::err_objc_unknown_at);
683  SkipUntil(tok::semi);
684  continue;
685  }
686 
687  // Eat the identifier.
688  ConsumeToken();
689 
690  switch (DirectiveKind) {
691  default:
692  // FIXME: If someone forgets an @end on a protocol, this loop will
693  // continue to eat up tons of stuff and spew lots of nonsense errors. It
694  // would probably be better to bail out if we saw an @class or @interface
695  // or something like that.
696  Diag(AtLoc, diag::err_objc_illegal_interface_qual);
697  // Skip until we see an '@' or '}' or ';'.
698  SkipUntil(tok::r_brace, tok::at, StopAtSemi);
699  break;
700 
701  case tok::objc_implementation:
702  case tok::objc_interface:
703  Diag(AtLoc, diag::err_objc_missing_end)
704  << FixItHint::CreateInsertion(AtLoc, "@end\n");
705  Diag(CDecl->getBeginLoc(), diag::note_objc_container_start)
706  << (int)Actions.getObjCContainerKind();
707  ConsumeToken();
708  break;
709 
710  case tok::objc_required:
711  case tok::objc_optional:
712  // This is only valid on protocols.
713  if (contextKey != tok::objc_protocol)
714  Diag(AtLoc, diag::err_objc_directive_only_in_protocol);
715  else
716  MethodImplKind = DirectiveKind;
717  break;
718 
719  case tok::objc_property:
720  ObjCDeclSpec OCDS;
721  SourceLocation LParenLoc;
722  // Parse property attribute list, if any.
723  if (Tok.is(tok::l_paren)) {
724  LParenLoc = Tok.getLocation();
725  ParseObjCPropertyAttribute(OCDS);
726  }
727 
728  bool addedToDeclSpec = false;
729  auto ObjCPropertyCallback = [&](ParsingFieldDeclarator &FD) {
730  if (FD.D.getIdentifier() == nullptr) {
731  Diag(AtLoc, diag::err_objc_property_requires_field_name)
732  << FD.D.getSourceRange();
733  return;
734  }
735  if (FD.BitfieldSize) {
736  Diag(AtLoc, diag::err_objc_property_bitfield)
737  << FD.D.getSourceRange();
738  return;
739  }
740 
741  // Map a nullability property attribute to a context-sensitive keyword
742  // attribute.
745  OCDS.getNullabilityLoc(),
746  addedToDeclSpec);
747 
748  // Install the property declarator into interfaceDecl.
749  IdentifierInfo *SelName =
750  OCDS.getGetterName() ? OCDS.getGetterName() : FD.D.getIdentifier();
751 
752  Selector GetterSel = PP.getSelectorTable().getNullarySelector(SelName);
753  IdentifierInfo *SetterName = OCDS.getSetterName();
754  Selector SetterSel;
755  if (SetterName)
756  SetterSel = PP.getSelectorTable().getSelector(1, &SetterName);
757  else
759  PP.getIdentifierTable(), PP.getSelectorTable(),
760  FD.D.getIdentifier());
761  Decl *Property = Actions.ActOnProperty(
762  getCurScope(), AtLoc, LParenLoc, FD, OCDS, GetterSel, SetterSel,
763  MethodImplKind);
764 
765  FD.complete(Property);
766  };
767 
768  // Parse all the comma separated declarators.
769  ParsingDeclSpec DS(*this);
770  ParseStructDeclaration(DS, ObjCPropertyCallback);
771 
772  ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list);
773  break;
774  }
775  }
776 
777  // We break out of the big loop in two cases: when we see @end or when we see
778  // EOF. In the former case, eat the @end. In the later case, emit an error.
779  if (Tok.is(tok::code_completion)) {
780  Actions.CodeCompleteObjCAtDirective(getCurScope());
781  return cutOffParsing();
782  } else if (Tok.isObjCAtKeyword(tok::objc_end)) {
783  ConsumeToken(); // the "end" identifier
784  } else {
785  Diag(Tok, diag::err_objc_missing_end)
786  << FixItHint::CreateInsertion(Tok.getLocation(), "\n@end\n");
787  Diag(CDecl->getBeginLoc(), diag::note_objc_container_start)
788  << (int)Actions.getObjCContainerKind();
789  AtEnd.setBegin(Tok.getLocation());
790  AtEnd.setEnd(Tok.getLocation());
791  }
792 
793  // Insert collected methods declarations into the @interface object.
794  // This passes in an invalid SourceLocation for AtEndLoc when EOF is hit.
795  Actions.ActOnAtEnd(getCurScope(), AtEnd, allMethods, allTUVariables);
796 }
797 
798 /// Diagnose redundant or conflicting nullability information.
800  ObjCDeclSpec &DS,
801  NullabilityKind nullability,
802  SourceLocation nullabilityLoc){
803  if (DS.getNullability() == nullability) {
804  P.Diag(nullabilityLoc, diag::warn_nullability_duplicate)
805  << DiagNullabilityKind(nullability, true)
807  return;
808  }
809 
810  P.Diag(nullabilityLoc, diag::err_nullability_conflicting)
811  << DiagNullabilityKind(nullability, true)
812  << DiagNullabilityKind(DS.getNullability(), true)
814 }
815 
816 /// Parse property attribute declarations.
817 ///
818 /// property-attr-decl: '(' property-attrlist ')'
819 /// property-attrlist:
820 /// property-attribute
821 /// property-attrlist ',' property-attribute
822 /// property-attribute:
823 /// getter '=' identifier
824 /// setter '=' identifier ':'
825 /// readonly
826 /// readwrite
827 /// assign
828 /// retain
829 /// copy
830 /// nonatomic
831 /// atomic
832 /// strong
833 /// weak
834 /// unsafe_unretained
835 /// nonnull
836 /// nullable
837 /// null_unspecified
838 /// null_resettable
839 /// class
840 ///
841 void Parser::ParseObjCPropertyAttribute(ObjCDeclSpec &DS) {
842  assert(Tok.getKind() == tok::l_paren);
843  BalancedDelimiterTracker T(*this, tok::l_paren);
844  T.consumeOpen();
845 
846  while (1) {
847  if (Tok.is(tok::code_completion)) {
848  Actions.CodeCompleteObjCPropertyFlags(getCurScope(), DS);
849  return cutOffParsing();
850  }
851  const IdentifierInfo *II = Tok.getIdentifierInfo();
852 
853  // If this is not an identifier at all, bail out early.
854  if (!II) {
855  T.consumeClose();
856  return;
857  }
858 
859  SourceLocation AttrName = ConsumeToken(); // consume last attribute name
860 
861  if (II->isStr("readonly"))
863  else if (II->isStr("assign"))
865  else if (II->isStr("unsafe_unretained"))
867  else if (II->isStr("readwrite"))
869  else if (II->isStr("retain"))
871  else if (II->isStr("strong"))
873  else if (II->isStr("copy"))
875  else if (II->isStr("nonatomic"))
877  else if (II->isStr("atomic"))
879  else if (II->isStr("weak"))
881  else if (II->isStr("getter") || II->isStr("setter")) {
882  bool IsSetter = II->getNameStart()[0] == 's';
883 
884  // getter/setter require extra treatment.
885  unsigned DiagID = IsSetter ? diag::err_objc_expected_equal_for_setter :
886  diag::err_objc_expected_equal_for_getter;
887 
888  if (ExpectAndConsume(tok::equal, DiagID)) {
889  SkipUntil(tok::r_paren, StopAtSemi);
890  return;
891  }
892 
893  if (Tok.is(tok::code_completion)) {
894  if (IsSetter)
895  Actions.CodeCompleteObjCPropertySetter(getCurScope());
896  else
897  Actions.CodeCompleteObjCPropertyGetter(getCurScope());
898  return cutOffParsing();
899  }
900 
901  SourceLocation SelLoc;
902  IdentifierInfo *SelIdent = ParseObjCSelectorPiece(SelLoc);
903 
904  if (!SelIdent) {
905  Diag(Tok, diag::err_objc_expected_selector_for_getter_setter)
906  << IsSetter;
907  SkipUntil(tok::r_paren, StopAtSemi);
908  return;
909  }
910 
911  if (IsSetter) {
913  DS.setSetterName(SelIdent, SelLoc);
914 
915  if (ExpectAndConsume(tok::colon,
916  diag::err_expected_colon_after_setter_name)) {
917  SkipUntil(tok::r_paren, StopAtSemi);
918  return;
919  }
920  } else {
922  DS.setGetterName(SelIdent, SelLoc);
923  }
924  } else if (II->isStr("nonnull")) {
928  Tok.getLocation());
930  DS.setNullability(Tok.getLocation(), NullabilityKind::NonNull);
931  } else if (II->isStr("nullable")) {
935  Tok.getLocation());
937  DS.setNullability(Tok.getLocation(), NullabilityKind::Nullable);
938  } else if (II->isStr("null_unspecified")) {
942  Tok.getLocation());
944  DS.setNullability(Tok.getLocation(), NullabilityKind::Unspecified);
945  } else if (II->isStr("null_resettable")) {
949  Tok.getLocation());
951  DS.setNullability(Tok.getLocation(), NullabilityKind::Unspecified);
952 
953  // Also set the null_resettable bit.
955  } else if (II->isStr("class")) {
957  } else {
958  Diag(AttrName, diag::err_objc_expected_property_attr) << II;
959  SkipUntil(tok::r_paren, StopAtSemi);
960  return;
961  }
962 
963  if (Tok.isNot(tok::comma))
964  break;
965 
966  ConsumeToken();
967  }
968 
969  T.consumeClose();
970 }
971 
972 /// objc-method-proto:
973 /// objc-instance-method objc-method-decl objc-method-attributes[opt]
974 /// objc-class-method objc-method-decl objc-method-attributes[opt]
975 ///
976 /// objc-instance-method: '-'
977 /// objc-class-method: '+'
978 ///
979 /// objc-method-attributes: [OBJC2]
980 /// __attribute__((deprecated))
981 ///
982 Decl *Parser::ParseObjCMethodPrototype(tok::ObjCKeywordKind MethodImplKind,
983  bool MethodDefinition) {
984  assert(Tok.isOneOf(tok::minus, tok::plus) && "expected +/-");
985 
986  tok::TokenKind methodType = Tok.getKind();
987  SourceLocation mLoc = ConsumeToken();
988  Decl *MDecl = ParseObjCMethodDecl(mLoc, methodType, MethodImplKind,
989  MethodDefinition);
990  // Since this rule is used for both method declarations and definitions,
991  // the caller is (optionally) responsible for consuming the ';'.
992  return MDecl;
993 }
994 
995 /// objc-selector:
996 /// identifier
997 /// one of
998 /// enum struct union if else while do for switch case default
999 /// break continue return goto asm sizeof typeof __alignof
1000 /// unsigned long const short volatile signed restrict _Complex
1001 /// in out inout bycopy byref oneway int char float double void _Bool
1002 ///
1003 IdentifierInfo *Parser::ParseObjCSelectorPiece(SourceLocation &SelectorLoc) {
1004 
1005  switch (Tok.getKind()) {
1006  default:
1007  return nullptr;
1008  case tok::colon:
1009  // Empty selector piece uses the location of the ':'.
1010  SelectorLoc = Tok.getLocation();
1011  return nullptr;
1012  case tok::ampamp:
1013  case tok::ampequal:
1014  case tok::amp:
1015  case tok::pipe:
1016  case tok::tilde:
1017  case tok::exclaim:
1018  case tok::exclaimequal:
1019  case tok::pipepipe:
1020  case tok::pipeequal:
1021  case tok::caret:
1022  case tok::caretequal: {
1023  std::string ThisTok(PP.getSpelling(Tok));
1024  if (isLetter(ThisTok[0])) {
1025  IdentifierInfo *II = &PP.getIdentifierTable().get(ThisTok);
1026  Tok.setKind(tok::identifier);
1027  SelectorLoc = ConsumeToken();
1028  return II;
1029  }
1030  return nullptr;
1031  }
1032 
1033  case tok::identifier:
1034  case tok::kw_asm:
1035  case tok::kw_auto:
1036  case tok::kw_bool:
1037  case tok::kw_break:
1038  case tok::kw_case:
1039  case tok::kw_catch:
1040  case tok::kw_char:
1041  case tok::kw_class:
1042  case tok::kw_const:
1043  case tok::kw_const_cast:
1044  case tok::kw_continue:
1045  case tok::kw_default:
1046  case tok::kw_delete:
1047  case tok::kw_do:
1048  case tok::kw_double:
1049  case tok::kw_dynamic_cast:
1050  case tok::kw_else:
1051  case tok::kw_enum:
1052  case tok::kw_explicit:
1053  case tok::kw_export:
1054  case tok::kw_extern:
1055  case tok::kw_false:
1056  case tok::kw_float:
1057  case tok::kw_for:
1058  case tok::kw_friend:
1059  case tok::kw_goto:
1060  case tok::kw_if:
1061  case tok::kw_inline:
1062  case tok::kw_int:
1063  case tok::kw_long:
1064  case tok::kw_mutable:
1065  case tok::kw_namespace:
1066  case tok::kw_new:
1067  case tok::kw_operator:
1068  case tok::kw_private:
1069  case tok::kw_protected:
1070  case tok::kw_public:
1071  case tok::kw_register:
1072  case tok::kw_reinterpret_cast:
1073  case tok::kw_restrict:
1074  case tok::kw_return:
1075  case tok::kw_short:
1076  case tok::kw_signed:
1077  case tok::kw_sizeof:
1078  case tok::kw_static:
1079  case tok::kw_static_cast:
1080  case tok::kw_struct:
1081  case tok::kw_switch:
1082  case tok::kw_template:
1083  case tok::kw_this:
1084  case tok::kw_throw:
1085  case tok::kw_true:
1086  case tok::kw_try:
1087  case tok::kw_typedef:
1088  case tok::kw_typeid:
1089  case tok::kw_typename:
1090  case tok::kw_typeof:
1091  case tok::kw_union:
1092  case tok::kw_unsigned:
1093  case tok::kw_using:
1094  case tok::kw_virtual:
1095  case tok::kw_void:
1096  case tok::kw_volatile:
1097  case tok::kw_wchar_t:
1098  case tok::kw_while:
1099  case tok::kw__Bool:
1100  case tok::kw__Complex:
1101  case tok::kw___alignof:
1102  case tok::kw___auto_type:
1103  IdentifierInfo *II = Tok.getIdentifierInfo();
1104  SelectorLoc = ConsumeToken();
1105  return II;
1106  }
1107 }
1108 
1109 /// objc-for-collection-in: 'in'
1110 ///
1111 bool Parser::isTokIdentifier_in() const {
1112  // FIXME: May have to do additional look-ahead to only allow for
1113  // valid tokens following an 'in'; such as an identifier, unary operators,
1114  // '[' etc.
1115  return (getLangOpts().ObjC && Tok.is(tok::identifier) &&
1116  Tok.getIdentifierInfo() == ObjCTypeQuals[objc_in]);
1117 }
1118 
1119 /// ParseObjCTypeQualifierList - This routine parses the objective-c's type
1120 /// qualifier list and builds their bitmask representation in the input
1121 /// argument.
1122 ///
1123 /// objc-type-qualifiers:
1124 /// objc-type-qualifier
1125 /// objc-type-qualifiers objc-type-qualifier
1126 ///
1127 /// objc-type-qualifier:
1128 /// 'in'
1129 /// 'out'
1130 /// 'inout'
1131 /// 'oneway'
1132 /// 'bycopy'
1133 /// 'byref'
1134 /// 'nonnull'
1135 /// 'nullable'
1136 /// 'null_unspecified'
1137 ///
1138 void Parser::ParseObjCTypeQualifierList(ObjCDeclSpec &DS,
1139  DeclaratorContext Context) {
1140  assert(Context == DeclaratorContext::ObjCParameterContext ||
1142 
1143  while (1) {
1144  if (Tok.is(tok::code_completion)) {
1145  Actions.CodeCompleteObjCPassingType(getCurScope(), DS,
1147  return cutOffParsing();
1148  }
1149 
1150  if (Tok.isNot(tok::identifier))
1151  return;
1152 
1153  const IdentifierInfo *II = Tok.getIdentifierInfo();
1154  for (unsigned i = 0; i != objc_NumQuals; ++i) {
1155  if (II != ObjCTypeQuals[i] ||
1156  NextToken().is(tok::less) ||
1157  NextToken().is(tok::coloncolon))
1158  continue;
1159 
1162  switch (i) {
1163  default: llvm_unreachable("Unknown decl qualifier");
1164  case objc_in: Qual = ObjCDeclSpec::DQ_In; break;
1165  case objc_out: Qual = ObjCDeclSpec::DQ_Out; break;
1166  case objc_inout: Qual = ObjCDeclSpec::DQ_Inout; break;
1167  case objc_oneway: Qual = ObjCDeclSpec::DQ_Oneway; break;
1168  case objc_bycopy: Qual = ObjCDeclSpec::DQ_Bycopy; break;
1169  case objc_byref: Qual = ObjCDeclSpec::DQ_Byref; break;
1170 
1171  case objc_nonnull:
1173  Nullability = NullabilityKind::NonNull;
1174  break;
1175 
1176  case objc_nullable:
1178  Nullability = NullabilityKind::Nullable;
1179  break;
1180 
1181  case objc_null_unspecified:
1183  Nullability = NullabilityKind::Unspecified;
1184  break;
1185  }
1186 
1187  // FIXME: Diagnose redundant specifiers.
1188  DS.setObjCDeclQualifier(Qual);
1189  if (Qual == ObjCDeclSpec::DQ_CSNullability)
1190  DS.setNullability(Tok.getLocation(), Nullability);
1191 
1192  ConsumeToken();
1193  II = nullptr;
1194  break;
1195  }
1196 
1197  // If this wasn't a recognized qualifier, bail out.
1198  if (II) return;
1199  }
1200 }
1201 
1202 /// Take all the decl attributes out of the given list and add
1203 /// them to the given attribute set.
1205  ParsedAttributesView &from) {
1206  for (auto &AL : llvm::reverse(from)) {
1207  if (!AL.isUsedAsTypeAttr()) {
1208  from.remove(&AL);
1209  attrs.addAtEnd(&AL);
1210  }
1211  }
1212 }
1213 
1214 /// takeDeclAttributes - Take all the decl attributes from the given
1215 /// declarator and add them to the given list.
1217  Declarator &D) {
1218  // First, take ownership of all attributes.
1219  attrs.getPool().takeAllFrom(D.getAttributePool());
1221 
1222  // Now actually move the attributes over.
1224  takeDeclAttributes(attrs, D.getAttributes());
1225  for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i)
1226  takeDeclAttributes(attrs, D.getTypeObject(i).getAttrs());
1227 }
1228 
1229 /// objc-type-name:
1230 /// '(' objc-type-qualifiers[opt] type-name ')'
1231 /// '(' objc-type-qualifiers[opt] ')'
1232 ///
1233 ParsedType Parser::ParseObjCTypeName(ObjCDeclSpec &DS,
1234  DeclaratorContext context,
1235  ParsedAttributes *paramAttrs) {
1236  assert(context == DeclaratorContext::ObjCParameterContext ||
1238  assert((paramAttrs != nullptr) ==
1240 
1241  assert(Tok.is(tok::l_paren) && "expected (");
1242 
1243  BalancedDelimiterTracker T(*this, tok::l_paren);
1244  T.consumeOpen();
1245 
1246  ObjCDeclContextSwitch ObjCDC(*this);
1247 
1248  // Parse type qualifiers, in, inout, etc.
1249  ParseObjCTypeQualifierList(DS, context);
1250  SourceLocation TypeStartLoc = Tok.getLocation();
1251 
1252  ParsedType Ty;
1253  if (isTypeSpecifierQualifier() || isObjCInstancetype()) {
1254  // Parse an abstract declarator.
1255  DeclSpec declSpec(AttrFactory);
1256  declSpec.setObjCQualifiers(&DS);
1257  DeclSpecContext dsContext = DeclSpecContext::DSC_normal;
1258  if (context == DeclaratorContext::ObjCResultContext)
1259  dsContext = DeclSpecContext::DSC_objc_method_result;
1260  ParseSpecifierQualifierList(declSpec, AS_none, dsContext);
1261  Declarator declarator(declSpec, context);
1262  ParseDeclarator(declarator);
1263 
1264  // If that's not invalid, extract a type.
1265  if (!declarator.isInvalidType()) {
1266  // Map a nullability specifier to a context-sensitive keyword attribute.
1267  bool addedToDeclSpec = false;
1269  addContextSensitiveTypeNullability(*this, declarator,
1270  DS.getNullability(),
1271  DS.getNullabilityLoc(),
1272  addedToDeclSpec);
1273 
1274  TypeResult type = Actions.ActOnTypeName(getCurScope(), declarator);
1275  if (!type.isInvalid())
1276  Ty = type.get();
1277 
1278  // If we're parsing a parameter, steal all the decl attributes
1279  // and add them to the decl spec.
1281  takeDeclAttributes(*paramAttrs, declarator);
1282  }
1283  }
1284 
1285  if (Tok.is(tok::r_paren))
1286  T.consumeClose();
1287  else if (Tok.getLocation() == TypeStartLoc) {
1288  // If we didn't eat any tokens, then this isn't a type.
1289  Diag(Tok, diag::err_expected_type);
1290  SkipUntil(tok::r_paren, StopAtSemi);
1291  } else {
1292  // Otherwise, we found *something*, but didn't get a ')' in the right
1293  // place. Emit an error then return what we have as the type.
1294  T.consumeClose();
1295  }
1296  return Ty;
1297 }
1298 
1299 /// objc-method-decl:
1300 /// objc-selector
1301 /// objc-keyword-selector objc-parmlist[opt]
1302 /// objc-type-name objc-selector
1303 /// objc-type-name objc-keyword-selector objc-parmlist[opt]
1304 ///
1305 /// objc-keyword-selector:
1306 /// objc-keyword-decl
1307 /// objc-keyword-selector objc-keyword-decl
1308 ///
1309 /// objc-keyword-decl:
1310 /// objc-selector ':' objc-type-name objc-keyword-attributes[opt] identifier
1311 /// objc-selector ':' objc-keyword-attributes[opt] identifier
1312 /// ':' objc-type-name objc-keyword-attributes[opt] identifier
1313 /// ':' objc-keyword-attributes[opt] identifier
1314 ///
1315 /// objc-parmlist:
1316 /// objc-parms objc-ellipsis[opt]
1317 ///
1318 /// objc-parms:
1319 /// objc-parms , parameter-declaration
1320 ///
1321 /// objc-ellipsis:
1322 /// , ...
1323 ///
1324 /// objc-keyword-attributes: [OBJC2]
1325 /// __attribute__((unused))
1326 ///
1327 Decl *Parser::ParseObjCMethodDecl(SourceLocation mLoc,
1328  tok::TokenKind mType,
1329  tok::ObjCKeywordKind MethodImplKind,
1330  bool MethodDefinition) {
1332 
1333  if (Tok.is(tok::code_completion)) {
1334  Actions.CodeCompleteObjCMethodDecl(getCurScope(), mType == tok::minus,
1335  /*ReturnType=*/nullptr);
1336  cutOffParsing();
1337  return nullptr;
1338  }
1339 
1340  // Parse the return type if present.
1341  ParsedType ReturnType;
1342  ObjCDeclSpec DSRet;
1343  if (Tok.is(tok::l_paren))
1344  ReturnType = ParseObjCTypeName(DSRet, DeclaratorContext::ObjCResultContext,
1345  nullptr);
1346 
1347  // If attributes exist before the method, parse them.
1348  ParsedAttributes methodAttrs(AttrFactory);
1349  if (getLangOpts().ObjC)
1350  MaybeParseGNUAttributes(methodAttrs);
1351  MaybeParseCXX11Attributes(methodAttrs);
1352 
1353  if (Tok.is(tok::code_completion)) {
1354  Actions.CodeCompleteObjCMethodDecl(getCurScope(), mType == tok::minus,
1355  ReturnType);
1356  cutOffParsing();
1357  return nullptr;
1358  }
1359 
1360  // Now parse the selector.
1361  SourceLocation selLoc;
1362  IdentifierInfo *SelIdent = ParseObjCSelectorPiece(selLoc);
1363 
1364  // An unnamed colon is valid.
1365  if (!SelIdent && Tok.isNot(tok::colon)) { // missing selector name.
1366  Diag(Tok, diag::err_expected_selector_for_method)
1367  << SourceRange(mLoc, Tok.getLocation());
1368  // Skip until we get a ; or @.
1369  SkipUntil(tok::at, StopAtSemi | StopBeforeMatch);
1370  return nullptr;
1371  }
1372 
1374  if (Tok.isNot(tok::colon)) {
1375  // If attributes exist after the method, parse them.
1376  if (getLangOpts().ObjC)
1377  MaybeParseGNUAttributes(methodAttrs);
1378  MaybeParseCXX11Attributes(methodAttrs);
1379 
1380  Selector Sel = PP.getSelectorTable().getNullarySelector(SelIdent);
1381  Decl *Result = Actions.ActOnMethodDeclaration(
1382  getCurScope(), mLoc, Tok.getLocation(), mType, DSRet, ReturnType,
1383  selLoc, Sel, nullptr, CParamInfo.data(), CParamInfo.size(), methodAttrs,
1384  MethodImplKind, false, MethodDefinition);
1385  PD.complete(Result);
1386  return Result;
1387  }
1388 
1392  ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
1394 
1395  AttributePool allParamAttrs(AttrFactory);
1396  while (1) {
1397  ParsedAttributes paramAttrs(AttrFactory);
1398  Sema::ObjCArgInfo ArgInfo;
1399 
1400  // Each iteration parses a single keyword argument.
1401  if (ExpectAndConsume(tok::colon))
1402  break;
1403 
1404  ArgInfo.Type = nullptr;
1405  if (Tok.is(tok::l_paren)) // Parse the argument type if present.
1406  ArgInfo.Type = ParseObjCTypeName(ArgInfo.DeclSpec,
1408  &paramAttrs);
1409 
1410  // If attributes exist before the argument name, parse them.
1411  // Regardless, collect all the attributes we've parsed so far.
1412  if (getLangOpts().ObjC)
1413  MaybeParseGNUAttributes(paramAttrs);
1414  MaybeParseCXX11Attributes(paramAttrs);
1415  ArgInfo.ArgAttrs = paramAttrs;
1416 
1417  // Code completion for the next piece of the selector.
1418  if (Tok.is(tok::code_completion)) {
1419  KeyIdents.push_back(SelIdent);
1420  Actions.CodeCompleteObjCMethodDeclSelector(getCurScope(),
1421  mType == tok::minus,
1422  /*AtParameterName=*/true,
1423  ReturnType, KeyIdents);
1424  cutOffParsing();
1425  return nullptr;
1426  }
1427 
1428  if (expectIdentifier())
1429  break; // missing argument name.
1430 
1431  ArgInfo.Name = Tok.getIdentifierInfo();
1432  ArgInfo.NameLoc = Tok.getLocation();
1433  ConsumeToken(); // Eat the identifier.
1434 
1435  ArgInfos.push_back(ArgInfo);
1436  KeyIdents.push_back(SelIdent);
1437  KeyLocs.push_back(selLoc);
1438 
1439  // Make sure the attributes persist.
1440  allParamAttrs.takeAllFrom(paramAttrs.getPool());
1441 
1442  // Code completion for the next piece of the selector.
1443  if (Tok.is(tok::code_completion)) {
1444  Actions.CodeCompleteObjCMethodDeclSelector(getCurScope(),
1445  mType == tok::minus,
1446  /*AtParameterName=*/false,
1447  ReturnType, KeyIdents);
1448  cutOffParsing();
1449  return nullptr;
1450  }
1451 
1452  // Check for another keyword selector.
1453  SelIdent = ParseObjCSelectorPiece(selLoc);
1454  if (!SelIdent && Tok.isNot(tok::colon))
1455  break;
1456  if (!SelIdent) {
1457  SourceLocation ColonLoc = Tok.getLocation();
1458  if (PP.getLocForEndOfToken(ArgInfo.NameLoc) == ColonLoc) {
1459  Diag(ArgInfo.NameLoc, diag::warn_missing_selector_name) << ArgInfo.Name;
1460  Diag(ArgInfo.NameLoc, diag::note_missing_selector_name) << ArgInfo.Name;
1461  Diag(ColonLoc, diag::note_force_empty_selector_name) << ArgInfo.Name;
1462  }
1463  }
1464  // We have a selector or a colon, continue parsing.
1465  }
1466 
1467  bool isVariadic = false;
1468  bool cStyleParamWarned = false;
1469  // Parse the (optional) parameter list.
1470  while (Tok.is(tok::comma)) {
1471  ConsumeToken();
1472  if (Tok.is(tok::ellipsis)) {
1473  isVariadic = true;
1474  ConsumeToken();
1475  break;
1476  }
1477  if (!cStyleParamWarned) {
1478  Diag(Tok, diag::warn_cstyle_param);
1479  cStyleParamWarned = true;
1480  }
1481  DeclSpec DS(AttrFactory);
1482  ParseDeclarationSpecifiers(DS);
1483  // Parse the declarator.
1485  ParseDeclarator(ParmDecl);
1486  IdentifierInfo *ParmII = ParmDecl.getIdentifier();
1487  Decl *Param = Actions.ActOnParamDeclarator(getCurScope(), ParmDecl);
1488  CParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
1489  ParmDecl.getIdentifierLoc(),
1490  Param,
1491  nullptr));
1492  }
1493 
1494  // FIXME: Add support for optional parameter list...
1495  // If attributes exist after the method, parse them.
1496  if (getLangOpts().ObjC)
1497  MaybeParseGNUAttributes(methodAttrs);
1498  MaybeParseCXX11Attributes(methodAttrs);
1499 
1500  if (KeyIdents.size() == 0)
1501  return nullptr;
1502 
1503  Selector Sel = PP.getSelectorTable().getSelector(KeyIdents.size(),
1504  &KeyIdents[0]);
1505  Decl *Result = Actions.ActOnMethodDeclaration(
1506  getCurScope(), mLoc, Tok.getLocation(), mType, DSRet, ReturnType, KeyLocs,
1507  Sel, &ArgInfos[0], CParamInfo.data(), CParamInfo.size(), methodAttrs,
1508  MethodImplKind, isVariadic, MethodDefinition);
1509 
1510  PD.complete(Result);
1511  return Result;
1512 }
1513 
1514 /// objc-protocol-refs:
1515 /// '<' identifier-list '>'
1516 ///
1517 bool Parser::
1518 ParseObjCProtocolReferences(SmallVectorImpl<Decl *> &Protocols,
1519  SmallVectorImpl<SourceLocation> &ProtocolLocs,
1520  bool WarnOnDeclarations, bool ForObjCContainer,
1521  SourceLocation &LAngleLoc, SourceLocation &EndLoc,
1522  bool consumeLastToken) {
1523  assert(Tok.is(tok::less) && "expected <");
1524 
1525  LAngleLoc = ConsumeToken(); // the "<"
1526 
1527  SmallVector<IdentifierLocPair, 8> ProtocolIdents;
1528 
1529  while (1) {
1530  if (Tok.is(tok::code_completion)) {
1531  Actions.CodeCompleteObjCProtocolReferences(ProtocolIdents);
1532  cutOffParsing();
1533  return true;
1534  }
1535 
1536  if (expectIdentifier()) {
1537  SkipUntil(tok::greater, StopAtSemi);
1538  return true;
1539  }
1540  ProtocolIdents.push_back(std::make_pair(Tok.getIdentifierInfo(),
1541  Tok.getLocation()));
1542  ProtocolLocs.push_back(Tok.getLocation());
1543  ConsumeToken();
1544 
1545  if (!TryConsumeToken(tok::comma))
1546  break;
1547  }
1548 
1549  // Consume the '>'.
1550  if (ParseGreaterThanInTemplateList(EndLoc, consumeLastToken,
1551  /*ObjCGenericList=*/false))
1552  return true;
1553 
1554  // Convert the list of protocols identifiers into a list of protocol decls.
1555  Actions.FindProtocolDeclaration(WarnOnDeclarations, ForObjCContainer,
1556  ProtocolIdents, Protocols);
1557  return false;
1558 }
1559 
1560 TypeResult Parser::parseObjCProtocolQualifierType(SourceLocation &rAngleLoc) {
1561  assert(Tok.is(tok::less) && "Protocol qualifiers start with '<'");
1562  assert(getLangOpts().ObjC && "Protocol qualifiers only exist in Objective-C");
1563 
1564  SourceLocation lAngleLoc;
1565  SmallVector<Decl *, 8> protocols;
1566  SmallVector<SourceLocation, 8> protocolLocs;
1567  (void)ParseObjCProtocolReferences(protocols, protocolLocs, false, false,
1568  lAngleLoc, rAngleLoc,
1569  /*consumeLastToken=*/true);
1570  TypeResult result = Actions.actOnObjCProtocolQualifierType(lAngleLoc,
1571  protocols,
1572  protocolLocs,
1573  rAngleLoc);
1574  if (result.isUsable()) {
1575  Diag(lAngleLoc, diag::warn_objc_protocol_qualifier_missing_id)
1576  << FixItHint::CreateInsertion(lAngleLoc, "id")
1577  << SourceRange(lAngleLoc, rAngleLoc);
1578  }
1579 
1580  return result;
1581 }
1582 
1583 /// Parse Objective-C type arguments or protocol qualifiers.
1584 ///
1585 /// objc-type-arguments:
1586 /// '<' type-name '...'[opt] (',' type-name '...'[opt])* '>'
1587 ///
1588 void Parser::parseObjCTypeArgsOrProtocolQualifiers(
1589  ParsedType baseType,
1590  SourceLocation &typeArgsLAngleLoc,
1591  SmallVectorImpl<ParsedType> &typeArgs,
1592  SourceLocation &typeArgsRAngleLoc,
1593  SourceLocation &protocolLAngleLoc,
1594  SmallVectorImpl<Decl *> &protocols,
1595  SmallVectorImpl<SourceLocation> &protocolLocs,
1596  SourceLocation &protocolRAngleLoc,
1597  bool consumeLastToken,
1598  bool warnOnIncompleteProtocols) {
1599  assert(Tok.is(tok::less) && "Not at the start of type args or protocols");
1600  SourceLocation lAngleLoc = ConsumeToken();
1601 
1602  // Whether all of the elements we've parsed thus far are single
1603  // identifiers, which might be types or might be protocols.
1604  bool allSingleIdentifiers = true;
1606  SmallVectorImpl<SourceLocation> &identifierLocs = protocolLocs;
1607 
1608  // Parse a list of comma-separated identifiers, bailing out if we
1609  // see something different.
1610  do {
1611  // Parse a single identifier.
1612  if (Tok.is(tok::identifier) &&
1613  (NextToken().is(tok::comma) ||
1614  NextToken().is(tok::greater) ||
1615  NextToken().is(tok::greatergreater))) {
1616  identifiers.push_back(Tok.getIdentifierInfo());
1617  identifierLocs.push_back(ConsumeToken());
1618  continue;
1619  }
1620 
1621  if (Tok.is(tok::code_completion)) {
1622  // FIXME: Also include types here.
1623  SmallVector<IdentifierLocPair, 4> identifierLocPairs;
1624  for (unsigned i = 0, n = identifiers.size(); i != n; ++i) {
1625  identifierLocPairs.push_back(IdentifierLocPair(identifiers[i],
1626  identifierLocs[i]));
1627  }
1628 
1629  QualType BaseT = Actions.GetTypeFromParser(baseType);
1630  if (!BaseT.isNull() && BaseT->acceptsObjCTypeParams()) {
1631  Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Type);
1632  } else {
1633  Actions.CodeCompleteObjCProtocolReferences(identifierLocPairs);
1634  }
1635  cutOffParsing();
1636  return;
1637  }
1638 
1639  allSingleIdentifiers = false;
1640  break;
1641  } while (TryConsumeToken(tok::comma));
1642 
1643  // If we parsed an identifier list, semantic analysis sorts out
1644  // whether it refers to protocols or to type arguments.
1645  if (allSingleIdentifiers) {
1646  // Parse the closing '>'.
1647  SourceLocation rAngleLoc;
1648  (void)ParseGreaterThanInTemplateList(rAngleLoc, consumeLastToken,
1649  /*ObjCGenericList=*/true);
1650 
1651  // Let Sema figure out what we parsed.
1652  Actions.actOnObjCTypeArgsOrProtocolQualifiers(getCurScope(),
1653  baseType,
1654  lAngleLoc,
1655  identifiers,
1656  identifierLocs,
1657  rAngleLoc,
1658  typeArgsLAngleLoc,
1659  typeArgs,
1660  typeArgsRAngleLoc,
1661  protocolLAngleLoc,
1662  protocols,
1663  protocolRAngleLoc,
1664  warnOnIncompleteProtocols);
1665  return;
1666  }
1667 
1668  // We parsed an identifier list but stumbled into non single identifiers, this
1669  // means we might (a) check that what we already parsed is a legitimate type
1670  // (not a protocol or unknown type) and (b) parse the remaining ones, which
1671  // must all be type args.
1672 
1673  // Convert the identifiers into type arguments.
1674  bool invalid = false;
1675  IdentifierInfo *foundProtocolId = nullptr, *foundValidTypeId = nullptr;
1676  SourceLocation foundProtocolSrcLoc, foundValidTypeSrcLoc;
1677  SmallVector<IdentifierInfo *, 2> unknownTypeArgs;
1678  SmallVector<SourceLocation, 2> unknownTypeArgsLoc;
1679 
1680  for (unsigned i = 0, n = identifiers.size(); i != n; ++i) {
1681  ParsedType typeArg
1682  = Actions.getTypeName(*identifiers[i], identifierLocs[i], getCurScope());
1683  if (typeArg) {
1684  DeclSpec DS(AttrFactory);
1685  const char *prevSpec = nullptr;
1686  unsigned diagID;
1687  DS.SetTypeSpecType(TST_typename, identifierLocs[i], prevSpec, diagID,
1688  typeArg, Actions.getASTContext().getPrintingPolicy());
1689 
1690  // Form a declarator to turn this into a type.
1692  TypeResult fullTypeArg = Actions.ActOnTypeName(getCurScope(), D);
1693  if (fullTypeArg.isUsable()) {
1694  typeArgs.push_back(fullTypeArg.get());
1695  if (!foundValidTypeId) {
1696  foundValidTypeId = identifiers[i];
1697  foundValidTypeSrcLoc = identifierLocs[i];
1698  }
1699  } else {
1700  invalid = true;
1701  unknownTypeArgs.push_back(identifiers[i]);
1702  unknownTypeArgsLoc.push_back(identifierLocs[i]);
1703  }
1704  } else {
1705  invalid = true;
1706  if (!Actions.LookupProtocol(identifiers[i], identifierLocs[i])) {
1707  unknownTypeArgs.push_back(identifiers[i]);
1708  unknownTypeArgsLoc.push_back(identifierLocs[i]);
1709  } else if (!foundProtocolId) {
1710  foundProtocolId = identifiers[i];
1711  foundProtocolSrcLoc = identifierLocs[i];
1712  }
1713  }
1714  }
1715 
1716  // Continue parsing type-names.
1717  do {
1718  Token CurTypeTok = Tok;
1719  TypeResult typeArg = ParseTypeName();
1720 
1721  // Consume the '...' for a pack expansion.
1722  SourceLocation ellipsisLoc;
1723  TryConsumeToken(tok::ellipsis, ellipsisLoc);
1724  if (typeArg.isUsable() && ellipsisLoc.isValid()) {
1725  typeArg = Actions.ActOnPackExpansion(typeArg.get(), ellipsisLoc);
1726  }
1727 
1728  if (typeArg.isUsable()) {
1729  typeArgs.push_back(typeArg.get());
1730  if (!foundValidTypeId) {
1731  foundValidTypeId = CurTypeTok.getIdentifierInfo();
1732  foundValidTypeSrcLoc = CurTypeTok.getLocation();
1733  }
1734  } else {
1735  invalid = true;
1736  }
1737  } while (TryConsumeToken(tok::comma));
1738 
1739  // Diagnose the mix between type args and protocols.
1740  if (foundProtocolId && foundValidTypeId)
1741  Actions.DiagnoseTypeArgsAndProtocols(foundProtocolId, foundProtocolSrcLoc,
1742  foundValidTypeId,
1743  foundValidTypeSrcLoc);
1744 
1745  // Diagnose unknown arg types.
1746  ParsedType T;
1747  if (unknownTypeArgs.size())
1748  for (unsigned i = 0, e = unknownTypeArgsLoc.size(); i < e; ++i)
1749  Actions.DiagnoseUnknownTypeName(unknownTypeArgs[i], unknownTypeArgsLoc[i],
1750  getCurScope(), nullptr, T);
1751 
1752  // Parse the closing '>'.
1753  SourceLocation rAngleLoc;
1754  (void)ParseGreaterThanInTemplateList(rAngleLoc, consumeLastToken,
1755  /*ObjCGenericList=*/true);
1756 
1757  if (invalid) {
1758  typeArgs.clear();
1759  return;
1760  }
1761 
1762  // Record left/right angle locations.
1763  typeArgsLAngleLoc = lAngleLoc;
1764  typeArgsRAngleLoc = rAngleLoc;
1765 }
1766 
1767 void Parser::parseObjCTypeArgsAndProtocolQualifiers(
1768  ParsedType baseType,
1769  SourceLocation &typeArgsLAngleLoc,
1770  SmallVectorImpl<ParsedType> &typeArgs,
1771  SourceLocation &typeArgsRAngleLoc,
1772  SourceLocation &protocolLAngleLoc,
1773  SmallVectorImpl<Decl *> &protocols,
1774  SmallVectorImpl<SourceLocation> &protocolLocs,
1775  SourceLocation &protocolRAngleLoc,
1776  bool consumeLastToken) {
1777  assert(Tok.is(tok::less));
1778 
1779  // Parse the first angle-bracket-delimited clause.
1780  parseObjCTypeArgsOrProtocolQualifiers(baseType,
1781  typeArgsLAngleLoc,
1782  typeArgs,
1783  typeArgsRAngleLoc,
1784  protocolLAngleLoc,
1785  protocols,
1786  protocolLocs,
1787  protocolRAngleLoc,
1788  consumeLastToken,
1789  /*warnOnIncompleteProtocols=*/false);
1790  if (Tok.is(tok::eof)) // Nothing else to do here...
1791  return;
1792 
1793  // An Objective-C object pointer followed by type arguments
1794  // can then be followed again by a set of protocol references, e.g.,
1795  // \c NSArray<NSView><NSTextDelegate>
1796  if ((consumeLastToken && Tok.is(tok::less)) ||
1797  (!consumeLastToken && NextToken().is(tok::less))) {
1798  // If we aren't consuming the last token, the prior '>' is still hanging
1799  // there. Consume it before we parse the protocol qualifiers.
1800  if (!consumeLastToken)
1801  ConsumeToken();
1802 
1803  if (!protocols.empty()) {
1804  SkipUntilFlags skipFlags = SkipUntilFlags();
1805  if (!consumeLastToken)
1806  skipFlags = skipFlags | StopBeforeMatch;
1807  Diag(Tok, diag::err_objc_type_args_after_protocols)
1808  << SourceRange(protocolLAngleLoc, protocolRAngleLoc);
1809  SkipUntil(tok::greater, tok::greatergreater, skipFlags);
1810  } else {
1811  ParseObjCProtocolReferences(protocols, protocolLocs,
1812  /*WarnOnDeclarations=*/false,
1813  /*ForObjCContainer=*/false,
1814  protocolLAngleLoc, protocolRAngleLoc,
1815  consumeLastToken);
1816  }
1817  }
1818 }
1819 
1820 TypeResult Parser::parseObjCTypeArgsAndProtocolQualifiers(
1821  SourceLocation loc,
1822  ParsedType type,
1823  bool consumeLastToken,
1824  SourceLocation &endLoc) {
1825  assert(Tok.is(tok::less));
1826  SourceLocation typeArgsLAngleLoc;
1827  SmallVector<ParsedType, 4> typeArgs;
1828  SourceLocation typeArgsRAngleLoc;
1829  SourceLocation protocolLAngleLoc;
1830  SmallVector<Decl *, 4> protocols;
1831  SmallVector<SourceLocation, 4> protocolLocs;
1832  SourceLocation protocolRAngleLoc;
1833 
1834  // Parse type arguments and protocol qualifiers.
1835  parseObjCTypeArgsAndProtocolQualifiers(type, typeArgsLAngleLoc, typeArgs,
1836  typeArgsRAngleLoc, protocolLAngleLoc,
1837  protocols, protocolLocs,
1838  protocolRAngleLoc, consumeLastToken);
1839 
1840  if (Tok.is(tok::eof))
1841  return true; // Invalid type result.
1842 
1843  // Compute the location of the last token.
1844  if (consumeLastToken)
1845  endLoc = PrevTokLocation;
1846  else
1847  endLoc = Tok.getLocation();
1848 
1849  return Actions.actOnObjCTypeArgsAndProtocolQualifiers(
1850  getCurScope(),
1851  loc,
1852  type,
1853  typeArgsLAngleLoc,
1854  typeArgs,
1855  typeArgsRAngleLoc,
1856  protocolLAngleLoc,
1857  protocols,
1858  protocolLocs,
1859  protocolRAngleLoc);
1860 }
1861 
1862 void Parser::HelperActionsForIvarDeclarations(Decl *interfaceDecl, SourceLocation atLoc,
1864  SmallVectorImpl<Decl *> &AllIvarDecls,
1865  bool RBraceMissing) {
1866  if (!RBraceMissing)
1867  T.consumeClose();
1868 
1869  Actions.ActOnObjCContainerStartDefinition(interfaceDecl);
1870  Actions.ActOnLastBitfield(T.getCloseLocation(), AllIvarDecls);
1871  Actions.ActOnObjCContainerFinishDefinition();
1872  // Call ActOnFields() even if we don't have any decls. This is useful
1873  // for code rewriting tools that need to be aware of the empty list.
1874  Actions.ActOnFields(getCurScope(), atLoc, interfaceDecl, AllIvarDecls,
1877 }
1878 
1879 /// objc-class-instance-variables:
1880 /// '{' objc-instance-variable-decl-list[opt] '}'
1881 ///
1882 /// objc-instance-variable-decl-list:
1883 /// objc-visibility-spec
1884 /// objc-instance-variable-decl ';'
1885 /// ';'
1886 /// objc-instance-variable-decl-list objc-visibility-spec
1887 /// objc-instance-variable-decl-list objc-instance-variable-decl ';'
1888 /// objc-instance-variable-decl-list static_assert-declaration
1889 /// objc-instance-variable-decl-list ';'
1890 ///
1891 /// objc-visibility-spec:
1892 /// @private
1893 /// @protected
1894 /// @public
1895 /// @package [OBJC2]
1896 ///
1897 /// objc-instance-variable-decl:
1898 /// struct-declaration
1899 ///
1900 void Parser::ParseObjCClassInstanceVariables(Decl *interfaceDecl,
1901  tok::ObjCKeywordKind visibility,
1902  SourceLocation atLoc) {
1903  assert(Tok.is(tok::l_brace) && "expected {");
1904  SmallVector<Decl *, 32> AllIvarDecls;
1905 
1906  ParseScope ClassScope(this, Scope::DeclScope|Scope::ClassScope);
1907  ObjCDeclContextSwitch ObjCDC(*this);
1908 
1909  BalancedDelimiterTracker T(*this, tok::l_brace);
1910  T.consumeOpen();
1911  // While we still have something to read, read the instance variables.
1912  while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
1913  // Each iteration of this loop reads one objc-instance-variable-decl.
1914 
1915  // Check for extraneous top-level semicolon.
1916  if (Tok.is(tok::semi)) {
1917  ConsumeExtraSemi(InstanceVariableList);
1918  continue;
1919  }
1920 
1921  // Set the default visibility to private.
1922  if (TryConsumeToken(tok::at)) { // parse objc-visibility-spec
1923  if (Tok.is(tok::code_completion)) {
1924  Actions.CodeCompleteObjCAtVisibility(getCurScope());
1925  return cutOffParsing();
1926  }
1927 
1928  switch (Tok.getObjCKeywordID()) {
1929  case tok::objc_private:
1930  case tok::objc_public:
1931  case tok::objc_protected:
1932  case tok::objc_package:
1933  visibility = Tok.getObjCKeywordID();
1934  ConsumeToken();
1935  continue;
1936 
1937  case tok::objc_end:
1938  Diag(Tok, diag::err_objc_unexpected_atend);
1939  Tok.setLocation(Tok.getLocation().getLocWithOffset(-1));
1940  Tok.setKind(tok::at);
1941  Tok.setLength(1);
1942  PP.EnterToken(Tok, /*IsReinject*/true);
1943  HelperActionsForIvarDeclarations(interfaceDecl, atLoc,
1944  T, AllIvarDecls, true);
1945  return;
1946 
1947  default:
1948  Diag(Tok, diag::err_objc_illegal_visibility_spec);
1949  continue;
1950  }
1951  }
1952 
1953  if (Tok.is(tok::code_completion)) {
1954  Actions.CodeCompleteOrdinaryName(getCurScope(),
1956  return cutOffParsing();
1957  }
1958 
1959  // This needs to duplicate a small amount of code from
1960  // ParseStructUnionBody() for things that should work in both
1961  // C struct and in Objective-C class instance variables.
1962  if (Tok.isOneOf(tok::kw_static_assert, tok::kw__Static_assert)) {
1963  SourceLocation DeclEnd;
1964  ParseStaticAssertDeclaration(DeclEnd);
1965  continue;
1966  }
1967 
1968  auto ObjCIvarCallback = [&](ParsingFieldDeclarator &FD) {
1969  Actions.ActOnObjCContainerStartDefinition(interfaceDecl);
1970  // Install the declarator into the interface decl.
1971  FD.D.setObjCIvar(true);
1972  Decl *Field = Actions.ActOnIvar(
1973  getCurScope(), FD.D.getDeclSpec().getSourceRange().getBegin(), FD.D,
1974  FD.BitfieldSize, visibility);
1975  Actions.ActOnObjCContainerFinishDefinition();
1976  if (Field)
1977  AllIvarDecls.push_back(Field);
1978  FD.complete(Field);
1979  };
1980 
1981  // Parse all the comma separated declarators.
1982  ParsingDeclSpec DS(*this);
1983  ParseStructDeclaration(DS, ObjCIvarCallback);
1984 
1985  if (Tok.is(tok::semi)) {
1986  ConsumeToken();
1987  } else {
1988  Diag(Tok, diag::err_expected_semi_decl_list);
1989  // Skip to end of block or statement
1990  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
1991  }
1992  }
1993  HelperActionsForIvarDeclarations(interfaceDecl, atLoc,
1994  T, AllIvarDecls, false);
1995 }
1996 
1997 /// objc-protocol-declaration:
1998 /// objc-protocol-definition
1999 /// objc-protocol-forward-reference
2000 ///
2001 /// objc-protocol-definition:
2002 /// \@protocol identifier
2003 /// objc-protocol-refs[opt]
2004 /// objc-interface-decl-list
2005 /// \@end
2006 ///
2007 /// objc-protocol-forward-reference:
2008 /// \@protocol identifier-list ';'
2009 ///
2010 /// "\@protocol identifier ;" should be resolved as "\@protocol
2011 /// identifier-list ;": objc-interface-decl-list may not start with a
2012 /// semicolon in the first alternative if objc-protocol-refs are omitted.
2014 Parser::ParseObjCAtProtocolDeclaration(SourceLocation AtLoc,
2015  ParsedAttributes &attrs) {
2016  assert(Tok.isObjCAtKeyword(tok::objc_protocol) &&
2017  "ParseObjCAtProtocolDeclaration(): Expected @protocol");
2018  ConsumeToken(); // the "protocol" identifier
2019 
2020  if (Tok.is(tok::code_completion)) {
2021  Actions.CodeCompleteObjCProtocolDecl(getCurScope());
2022  cutOffParsing();
2023  return nullptr;
2024  }
2025 
2026  MaybeSkipAttributes(tok::objc_protocol);
2027 
2028  if (expectIdentifier())
2029  return nullptr; // missing protocol name.
2030  // Save the protocol name, then consume it.
2031  IdentifierInfo *protocolName = Tok.getIdentifierInfo();
2032  SourceLocation nameLoc = ConsumeToken();
2033 
2034  if (TryConsumeToken(tok::semi)) { // forward declaration of one protocol.
2035  IdentifierLocPair ProtoInfo(protocolName, nameLoc);
2036  return Actions.ActOnForwardProtocolDeclaration(AtLoc, ProtoInfo, attrs);
2037  }
2038 
2039  CheckNestedObjCContexts(AtLoc);
2040 
2041  if (Tok.is(tok::comma)) { // list of forward declarations.
2042  SmallVector<IdentifierLocPair, 8> ProtocolRefs;
2043  ProtocolRefs.push_back(std::make_pair(protocolName, nameLoc));
2044 
2045  // Parse the list of forward declarations.
2046  while (1) {
2047  ConsumeToken(); // the ','
2048  if (expectIdentifier()) {
2049  SkipUntil(tok::semi);
2050  return nullptr;
2051  }
2052  ProtocolRefs.push_back(IdentifierLocPair(Tok.getIdentifierInfo(),
2053  Tok.getLocation()));
2054  ConsumeToken(); // the identifier
2055 
2056  if (Tok.isNot(tok::comma))
2057  break;
2058  }
2059  // Consume the ';'.
2060  if (ExpectAndConsume(tok::semi, diag::err_expected_after, "@protocol"))
2061  return nullptr;
2062 
2063  return Actions.ActOnForwardProtocolDeclaration(AtLoc, ProtocolRefs, attrs);
2064  }
2065 
2066  // Last, and definitely not least, parse a protocol declaration.
2067  SourceLocation LAngleLoc, EndProtoLoc;
2068 
2069  SmallVector<Decl *, 8> ProtocolRefs;
2070  SmallVector<SourceLocation, 8> ProtocolLocs;
2071  if (Tok.is(tok::less) &&
2072  ParseObjCProtocolReferences(ProtocolRefs, ProtocolLocs, false, true,
2073  LAngleLoc, EndProtoLoc,
2074  /*consumeLastToken=*/true))
2075  return nullptr;
2076 
2077  Decl *ProtoType = Actions.ActOnStartProtocolInterface(
2078  AtLoc, protocolName, nameLoc, ProtocolRefs.data(), ProtocolRefs.size(),
2079  ProtocolLocs.data(), EndProtoLoc, attrs);
2080 
2081  ParseObjCInterfaceDeclList(tok::objc_protocol, ProtoType);
2082  return Actions.ConvertDeclToDeclGroup(ProtoType);
2083 }
2084 
2085 /// objc-implementation:
2086 /// objc-class-implementation-prologue
2087 /// objc-category-implementation-prologue
2088 ///
2089 /// objc-class-implementation-prologue:
2090 /// @implementation identifier objc-superclass[opt]
2091 /// objc-class-instance-variables[opt]
2092 ///
2093 /// objc-category-implementation-prologue:
2094 /// @implementation identifier ( identifier )
2096 Parser::ParseObjCAtImplementationDeclaration(SourceLocation AtLoc,
2097  ParsedAttributes &Attrs) {
2098  assert(Tok.isObjCAtKeyword(tok::objc_implementation) &&
2099  "ParseObjCAtImplementationDeclaration(): Expected @implementation");
2100  CheckNestedObjCContexts(AtLoc);
2101  ConsumeToken(); // the "implementation" identifier
2102 
2103  // Code completion after '@implementation'.
2104  if (Tok.is(tok::code_completion)) {
2105  Actions.CodeCompleteObjCImplementationDecl(getCurScope());
2106  cutOffParsing();
2107  return nullptr;
2108  }
2109 
2110  MaybeSkipAttributes(tok::objc_implementation);
2111 
2112  if (expectIdentifier())
2113  return nullptr; // missing class or category name.
2114  // We have a class or category name - consume it.
2115  IdentifierInfo *nameId = Tok.getIdentifierInfo();
2116  SourceLocation nameLoc = ConsumeToken(); // consume class or category name
2117  Decl *ObjCImpDecl = nullptr;
2118 
2119  // Neither a type parameter list nor a list of protocol references is
2120  // permitted here. Parse and diagnose them.
2121  if (Tok.is(tok::less)) {
2122  SourceLocation lAngleLoc, rAngleLoc;
2123  SmallVector<IdentifierLocPair, 8> protocolIdents;
2124  SourceLocation diagLoc = Tok.getLocation();
2125  ObjCTypeParamListScope typeParamScope(Actions, getCurScope());
2126  if (parseObjCTypeParamListOrProtocolRefs(typeParamScope, lAngleLoc,
2127  protocolIdents, rAngleLoc)) {
2128  Diag(diagLoc, diag::err_objc_parameterized_implementation)
2129  << SourceRange(diagLoc, PrevTokLocation);
2130  } else if (lAngleLoc.isValid()) {
2131  Diag(lAngleLoc, diag::err_unexpected_protocol_qualifier)
2132  << FixItHint::CreateRemoval(SourceRange(lAngleLoc, rAngleLoc));
2133  }
2134  }
2135 
2136  if (Tok.is(tok::l_paren)) {
2137  // we have a category implementation.
2138  ConsumeParen();
2139  SourceLocation categoryLoc, rparenLoc;
2140  IdentifierInfo *categoryId = nullptr;
2141 
2142  if (Tok.is(tok::code_completion)) {
2143  Actions.CodeCompleteObjCImplementationCategory(getCurScope(), nameId, nameLoc);
2144  cutOffParsing();
2145  return nullptr;
2146  }
2147 
2148  if (Tok.is(tok::identifier)) {
2149  categoryId = Tok.getIdentifierInfo();
2150  categoryLoc = ConsumeToken();
2151  } else {
2152  Diag(Tok, diag::err_expected)
2153  << tok::identifier; // missing category name.
2154  return nullptr;
2155  }
2156  if (Tok.isNot(tok::r_paren)) {
2157  Diag(Tok, diag::err_expected) << tok::r_paren;
2158  SkipUntil(tok::r_paren); // don't stop at ';'
2159  return nullptr;
2160  }
2161  rparenLoc = ConsumeParen();
2162  if (Tok.is(tok::less)) { // we have illegal '<' try to recover
2163  Diag(Tok, diag::err_unexpected_protocol_qualifier);
2164  SourceLocation protocolLAngleLoc, protocolRAngleLoc;
2165  SmallVector<Decl *, 4> protocols;
2166  SmallVector<SourceLocation, 4> protocolLocs;
2167  (void)ParseObjCProtocolReferences(protocols, protocolLocs,
2168  /*warnOnIncompleteProtocols=*/false,
2169  /*ForObjCContainer=*/false,
2170  protocolLAngleLoc, protocolRAngleLoc,
2171  /*consumeLastToken=*/true);
2172  }
2173  ObjCImpDecl = Actions.ActOnStartCategoryImplementation(
2174  AtLoc, nameId, nameLoc, categoryId, categoryLoc, Attrs);
2175 
2176  } else {
2177  // We have a class implementation
2178  SourceLocation superClassLoc;
2179  IdentifierInfo *superClassId = nullptr;
2180  if (TryConsumeToken(tok::colon)) {
2181  // We have a super class
2182  if (expectIdentifier())
2183  return nullptr; // missing super class name.
2184  superClassId = Tok.getIdentifierInfo();
2185  superClassLoc = ConsumeToken(); // Consume super class name
2186  }
2187  ObjCImpDecl = Actions.ActOnStartClassImplementation(
2188  AtLoc, nameId, nameLoc, superClassId, superClassLoc, Attrs);
2189 
2190  if (Tok.is(tok::l_brace)) // we have ivars
2191  ParseObjCClassInstanceVariables(ObjCImpDecl, tok::objc_private, AtLoc);
2192  else if (Tok.is(tok::less)) { // we have illegal '<' try to recover
2193  Diag(Tok, diag::err_unexpected_protocol_qualifier);
2194 
2195  SourceLocation protocolLAngleLoc, protocolRAngleLoc;
2196  SmallVector<Decl *, 4> protocols;
2197  SmallVector<SourceLocation, 4> protocolLocs;
2198  (void)ParseObjCProtocolReferences(protocols, protocolLocs,
2199  /*warnOnIncompleteProtocols=*/false,
2200  /*ForObjCContainer=*/false,
2201  protocolLAngleLoc, protocolRAngleLoc,
2202  /*consumeLastToken=*/true);
2203  }
2204  }
2205  assert(ObjCImpDecl);
2206 
2207  SmallVector<Decl *, 8> DeclsInGroup;
2208 
2209  {
2210  ObjCImplParsingDataRAII ObjCImplParsing(*this, ObjCImpDecl);
2211  while (!ObjCImplParsing.isFinished() && !isEofOrEom()) {
2212  ParsedAttributesWithRange attrs(AttrFactory);
2213  MaybeParseCXX11Attributes(attrs);
2214  if (DeclGroupPtrTy DGP = ParseExternalDeclaration(attrs)) {
2215  DeclGroupRef DG = DGP.get();
2216  DeclsInGroup.append(DG.begin(), DG.end());
2217  }
2218  }
2219  }
2220 
2221  return Actions.ActOnFinishObjCImplementation(ObjCImpDecl, DeclsInGroup);
2222 }
2223 
2225 Parser::ParseObjCAtEndDeclaration(SourceRange atEnd) {
2226  assert(Tok.isObjCAtKeyword(tok::objc_end) &&
2227  "ParseObjCAtEndDeclaration(): Expected @end");
2228  ConsumeToken(); // the "end" identifier
2229  if (CurParsedObjCImpl)
2230  CurParsedObjCImpl->finish(atEnd);
2231  else
2232  // missing @implementation
2233  Diag(atEnd.getBegin(), diag::err_expected_objc_container);
2234  return nullptr;
2235 }
2236 
2237 Parser::ObjCImplParsingDataRAII::~ObjCImplParsingDataRAII() {
2238  if (!Finished) {
2239  finish(P.Tok.getLocation());
2240  if (P.isEofOrEom()) {
2241  P.Diag(P.Tok, diag::err_objc_missing_end)
2242  << FixItHint::CreateInsertion(P.Tok.getLocation(), "\n@end\n");
2243  P.Diag(Dcl->getBeginLoc(), diag::note_objc_container_start)
2245  }
2246  }
2247  P.CurParsedObjCImpl = nullptr;
2248  assert(LateParsedObjCMethods.empty());
2249 }
2250 
2251 void Parser::ObjCImplParsingDataRAII::finish(SourceRange AtEnd) {
2252  assert(!Finished);
2253  P.Actions.DefaultSynthesizeProperties(P.getCurScope(), Dcl, AtEnd.getBegin());
2254  for (size_t i = 0; i < LateParsedObjCMethods.size(); ++i)
2255  P.ParseLexedObjCMethodDefs(*LateParsedObjCMethods[i],
2256  true/*Methods*/);
2257 
2258  P.Actions.ActOnAtEnd(P.getCurScope(), AtEnd);
2259 
2260  if (HasCFunction)
2261  for (size_t i = 0; i < LateParsedObjCMethods.size(); ++i)
2262  P.ParseLexedObjCMethodDefs(*LateParsedObjCMethods[i],
2263  false/*c-functions*/);
2264 
2265  /// Clear and free the cached objc methods.
2266  for (LateParsedObjCMethodContainer::iterator
2267  I = LateParsedObjCMethods.begin(),
2268  E = LateParsedObjCMethods.end(); I != E; ++I)
2269  delete *I;
2270  LateParsedObjCMethods.clear();
2271 
2272  Finished = true;
2273 }
2274 
2275 /// compatibility-alias-decl:
2276 /// @compatibility_alias alias-name class-name ';'
2277 ///
2278 Decl *Parser::ParseObjCAtAliasDeclaration(SourceLocation atLoc) {
2279  assert(Tok.isObjCAtKeyword(tok::objc_compatibility_alias) &&
2280  "ParseObjCAtAliasDeclaration(): Expected @compatibility_alias");
2281  ConsumeToken(); // consume compatibility_alias
2282  if (expectIdentifier())
2283  return nullptr;
2284  IdentifierInfo *aliasId = Tok.getIdentifierInfo();
2285  SourceLocation aliasLoc = ConsumeToken(); // consume alias-name
2286  if (expectIdentifier())
2287  return nullptr;
2288  IdentifierInfo *classId = Tok.getIdentifierInfo();
2289  SourceLocation classLoc = ConsumeToken(); // consume class-name;
2290  ExpectAndConsume(tok::semi, diag::err_expected_after, "@compatibility_alias");
2291  return Actions.ActOnCompatibilityAlias(atLoc, aliasId, aliasLoc,
2292  classId, classLoc);
2293 }
2294 
2295 /// property-synthesis:
2296 /// @synthesize property-ivar-list ';'
2297 ///
2298 /// property-ivar-list:
2299 /// property-ivar
2300 /// property-ivar-list ',' property-ivar
2301 ///
2302 /// property-ivar:
2303 /// identifier
2304 /// identifier '=' identifier
2305 ///
2306 Decl *Parser::ParseObjCPropertySynthesize(SourceLocation atLoc) {
2307  assert(Tok.isObjCAtKeyword(tok::objc_synthesize) &&
2308  "ParseObjCPropertySynthesize(): Expected '@synthesize'");
2309  ConsumeToken(); // consume synthesize
2310 
2311  while (true) {
2312  if (Tok.is(tok::code_completion)) {
2313  Actions.CodeCompleteObjCPropertyDefinition(getCurScope());
2314  cutOffParsing();
2315  return nullptr;
2316  }
2317 
2318  if (Tok.isNot(tok::identifier)) {
2319  Diag(Tok, diag::err_synthesized_property_name);
2320  SkipUntil(tok::semi);
2321  return nullptr;
2322  }
2323 
2324  IdentifierInfo *propertyIvar = nullptr;
2325  IdentifierInfo *propertyId = Tok.getIdentifierInfo();
2326  SourceLocation propertyLoc = ConsumeToken(); // consume property name
2327  SourceLocation propertyIvarLoc;
2328  if (TryConsumeToken(tok::equal)) {
2329  // property '=' ivar-name
2330  if (Tok.is(tok::code_completion)) {
2331  Actions.CodeCompleteObjCPropertySynthesizeIvar(getCurScope(), propertyId);
2332  cutOffParsing();
2333  return nullptr;
2334  }
2335 
2336  if (expectIdentifier())
2337  break;
2338  propertyIvar = Tok.getIdentifierInfo();
2339  propertyIvarLoc = ConsumeToken(); // consume ivar-name
2340  }
2341  Actions.ActOnPropertyImplDecl(
2342  getCurScope(), atLoc, propertyLoc, true,
2343  propertyId, propertyIvar, propertyIvarLoc,
2345  if (Tok.isNot(tok::comma))
2346  break;
2347  ConsumeToken(); // consume ','
2348  }
2349  ExpectAndConsume(tok::semi, diag::err_expected_after, "@synthesize");
2350  return nullptr;
2351 }
2352 
2353 /// property-dynamic:
2354 /// @dynamic property-list
2355 ///
2356 /// property-list:
2357 /// identifier
2358 /// property-list ',' identifier
2359 ///
2360 Decl *Parser::ParseObjCPropertyDynamic(SourceLocation atLoc) {
2361  assert(Tok.isObjCAtKeyword(tok::objc_dynamic) &&
2362  "ParseObjCPropertyDynamic(): Expected '@dynamic'");
2363  ConsumeToken(); // consume dynamic
2364 
2365  bool isClassProperty = false;
2366  if (Tok.is(tok::l_paren)) {
2367  ConsumeParen();
2368  const IdentifierInfo *II = Tok.getIdentifierInfo();
2369 
2370  if (!II) {
2371  Diag(Tok, diag::err_objc_expected_property_attr) << II;
2372  SkipUntil(tok::r_paren, StopAtSemi);
2373  } else {
2374  SourceLocation AttrName = ConsumeToken(); // consume attribute name
2375  if (II->isStr("class")) {
2376  isClassProperty = true;
2377  if (Tok.isNot(tok::r_paren)) {
2378  Diag(Tok, diag::err_expected) << tok::r_paren;
2379  SkipUntil(tok::r_paren, StopAtSemi);
2380  } else
2381  ConsumeParen();
2382  } else {
2383  Diag(AttrName, diag::err_objc_expected_property_attr) << II;
2384  SkipUntil(tok::r_paren, StopAtSemi);
2385  }
2386  }
2387  }
2388 
2389  while (true) {
2390  if (Tok.is(tok::code_completion)) {
2391  Actions.CodeCompleteObjCPropertyDefinition(getCurScope());
2392  cutOffParsing();
2393  return nullptr;
2394  }
2395 
2396  if (expectIdentifier()) {
2397  SkipUntil(tok::semi);
2398  return nullptr;
2399  }
2400 
2401  IdentifierInfo *propertyId = Tok.getIdentifierInfo();
2402  SourceLocation propertyLoc = ConsumeToken(); // consume property name
2403  Actions.ActOnPropertyImplDecl(
2404  getCurScope(), atLoc, propertyLoc, false,
2405  propertyId, nullptr, SourceLocation(),
2406  isClassProperty ? ObjCPropertyQueryKind::OBJC_PR_query_class :
2408 
2409  if (Tok.isNot(tok::comma))
2410  break;
2411  ConsumeToken(); // consume ','
2412  }
2413  ExpectAndConsume(tok::semi, diag::err_expected_after, "@dynamic");
2414  return nullptr;
2415 }
2416 
2417 /// objc-throw-statement:
2418 /// throw expression[opt];
2419 ///
2420 StmtResult Parser::ParseObjCThrowStmt(SourceLocation atLoc) {
2421  ExprResult Res;
2422  ConsumeToken(); // consume throw
2423  if (Tok.isNot(tok::semi)) {
2424  Res = ParseExpression();
2425  if (Res.isInvalid()) {
2426  SkipUntil(tok::semi);
2427  return StmtError();
2428  }
2429  }
2430  // consume ';'
2431  ExpectAndConsume(tok::semi, diag::err_expected_after, "@throw");
2432  return Actions.ActOnObjCAtThrowStmt(atLoc, Res.get(), getCurScope());
2433 }
2434 
2435 /// objc-synchronized-statement:
2436 /// @synchronized '(' expression ')' compound-statement
2437 ///
2438 StmtResult
2439 Parser::ParseObjCSynchronizedStmt(SourceLocation atLoc) {
2440  ConsumeToken(); // consume synchronized
2441  if (Tok.isNot(tok::l_paren)) {
2442  Diag(Tok, diag::err_expected_lparen_after) << "@synchronized";
2443  return StmtError();
2444  }
2445 
2446  // The operand is surrounded with parentheses.
2447  ConsumeParen(); // '('
2448  ExprResult operand(ParseExpression());
2449 
2450  if (Tok.is(tok::r_paren)) {
2451  ConsumeParen(); // ')'
2452  } else {
2453  if (!operand.isInvalid())
2454  Diag(Tok, diag::err_expected) << tok::r_paren;
2455 
2456  // Skip forward until we see a left brace, but don't consume it.
2457  SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
2458  }
2459 
2460  // Require a compound statement.
2461  if (Tok.isNot(tok::l_brace)) {
2462  if (!operand.isInvalid())
2463  Diag(Tok, diag::err_expected) << tok::l_brace;
2464  return StmtError();
2465  }
2466 
2467  // Check the @synchronized operand now.
2468  if (!operand.isInvalid())
2469  operand = Actions.ActOnObjCAtSynchronizedOperand(atLoc, operand.get());
2470 
2471  // Parse the compound statement within a new scope.
2472  ParseScope bodyScope(this, Scope::DeclScope | Scope::CompoundStmtScope);
2473  StmtResult body(ParseCompoundStatementBody());
2474  bodyScope.Exit();
2475 
2476  // If there was a semantic or parse error earlier with the
2477  // operand, fail now.
2478  if (operand.isInvalid())
2479  return StmtError();
2480 
2481  if (body.isInvalid())
2482  body = Actions.ActOnNullStmt(Tok.getLocation());
2483 
2484  return Actions.ActOnObjCAtSynchronizedStmt(atLoc, operand.get(), body.get());
2485 }
2486 
2487 /// objc-try-catch-statement:
2488 /// @try compound-statement objc-catch-list[opt]
2489 /// @try compound-statement objc-catch-list[opt] @finally compound-statement
2490 ///
2491 /// objc-catch-list:
2492 /// @catch ( parameter-declaration ) compound-statement
2493 /// objc-catch-list @catch ( catch-parameter-declaration ) compound-statement
2494 /// catch-parameter-declaration:
2495 /// parameter-declaration
2496 /// '...' [OBJC2]
2497 ///
2498 StmtResult Parser::ParseObjCTryStmt(SourceLocation atLoc) {
2499  bool catch_or_finally_seen = false;
2500 
2501  ConsumeToken(); // consume try
2502  if (Tok.isNot(tok::l_brace)) {
2503  Diag(Tok, diag::err_expected) << tok::l_brace;
2504  return StmtError();
2505  }
2506  StmtVector CatchStmts;
2507  StmtResult FinallyStmt;
2508  ParseScope TryScope(this, Scope::DeclScope | Scope::CompoundStmtScope);
2509  StmtResult TryBody(ParseCompoundStatementBody());
2510  TryScope.Exit();
2511  if (TryBody.isInvalid())
2512  TryBody = Actions.ActOnNullStmt(Tok.getLocation());
2513 
2514  while (Tok.is(tok::at)) {
2515  // At this point, we need to lookahead to determine if this @ is the start
2516  // of an @catch or @finally. We don't want to consume the @ token if this
2517  // is an @try or @encode or something else.
2518  Token AfterAt = GetLookAheadToken(1);
2519  if (!AfterAt.isObjCAtKeyword(tok::objc_catch) &&
2520  !AfterAt.isObjCAtKeyword(tok::objc_finally))
2521  break;
2522 
2523  SourceLocation AtCatchFinallyLoc = ConsumeToken();
2524  if (Tok.isObjCAtKeyword(tok::objc_catch)) {
2525  Decl *FirstPart = nullptr;
2526  ConsumeToken(); // consume catch
2527  if (Tok.is(tok::l_paren)) {
2528  ConsumeParen();
2529  ParseScope CatchScope(this, Scope::DeclScope |
2532  if (Tok.isNot(tok::ellipsis)) {
2533  DeclSpec DS(AttrFactory);
2534  ParseDeclarationSpecifiers(DS);
2536  ParseDeclarator(ParmDecl);
2537 
2538  // Inform the actions module about the declarator, so it
2539  // gets added to the current scope.
2540  FirstPart = Actions.ActOnObjCExceptionDecl(getCurScope(), ParmDecl);
2541  } else
2542  ConsumeToken(); // consume '...'
2543 
2544  SourceLocation RParenLoc;
2545 
2546  if (Tok.is(tok::r_paren))
2547  RParenLoc = ConsumeParen();
2548  else // Skip over garbage, until we get to ')'. Eat the ')'.
2549  SkipUntil(tok::r_paren, StopAtSemi);
2550 
2551  StmtResult CatchBody(true);
2552  if (Tok.is(tok::l_brace))
2553  CatchBody = ParseCompoundStatementBody();
2554  else
2555  Diag(Tok, diag::err_expected) << tok::l_brace;
2556  if (CatchBody.isInvalid())
2557  CatchBody = Actions.ActOnNullStmt(Tok.getLocation());
2558 
2559  StmtResult Catch = Actions.ActOnObjCAtCatchStmt(AtCatchFinallyLoc,
2560  RParenLoc,
2561  FirstPart,
2562  CatchBody.get());
2563  if (!Catch.isInvalid())
2564  CatchStmts.push_back(Catch.get());
2565 
2566  } else {
2567  Diag(AtCatchFinallyLoc, diag::err_expected_lparen_after)
2568  << "@catch clause";
2569  return StmtError();
2570  }
2571  catch_or_finally_seen = true;
2572  } else {
2573  assert(Tok.isObjCAtKeyword(tok::objc_finally) && "Lookahead confused?");
2574  ConsumeToken(); // consume finally
2575  ParseScope FinallyScope(this,
2577 
2578  bool ShouldCapture =
2579  getTargetInfo().getTriple().isWindowsMSVCEnvironment();
2580  if (ShouldCapture)
2581  Actions.ActOnCapturedRegionStart(Tok.getLocation(), getCurScope(),
2582  CR_ObjCAtFinally, 1);
2583 
2584  StmtResult FinallyBody(true);
2585  if (Tok.is(tok::l_brace))
2586  FinallyBody = ParseCompoundStatementBody();
2587  else
2588  Diag(Tok, diag::err_expected) << tok::l_brace;
2589 
2590  if (FinallyBody.isInvalid()) {
2591  FinallyBody = Actions.ActOnNullStmt(Tok.getLocation());
2592  if (ShouldCapture)
2593  Actions.ActOnCapturedRegionError();
2594  } else if (ShouldCapture) {
2595  FinallyBody = Actions.ActOnCapturedRegionEnd(FinallyBody.get());
2596  }
2597 
2598  FinallyStmt = Actions.ActOnObjCAtFinallyStmt(AtCatchFinallyLoc,
2599  FinallyBody.get());
2600  catch_or_finally_seen = true;
2601  break;
2602  }
2603  }
2604  if (!catch_or_finally_seen) {
2605  Diag(atLoc, diag::err_missing_catch_finally);
2606  return StmtError();
2607  }
2608 
2609  return Actions.ActOnObjCAtTryStmt(atLoc, TryBody.get(),
2610  CatchStmts,
2611  FinallyStmt.get());
2612 }
2613 
2614 /// objc-autoreleasepool-statement:
2615 /// @autoreleasepool compound-statement
2616 ///
2617 StmtResult
2618 Parser::ParseObjCAutoreleasePoolStmt(SourceLocation atLoc) {
2619  ConsumeToken(); // consume autoreleasepool
2620  if (Tok.isNot(tok::l_brace)) {
2621  Diag(Tok, diag::err_expected) << tok::l_brace;
2622  return StmtError();
2623  }
2624  // Enter a scope to hold everything within the compound stmt. Compound
2625  // statements can always hold declarations.
2626  ParseScope BodyScope(this, Scope::DeclScope | Scope::CompoundStmtScope);
2627 
2628  StmtResult AutoreleasePoolBody(ParseCompoundStatementBody());
2629 
2630  BodyScope.Exit();
2631  if (AutoreleasePoolBody.isInvalid())
2632  AutoreleasePoolBody = Actions.ActOnNullStmt(Tok.getLocation());
2633  return Actions.ActOnObjCAutoreleasePoolStmt(atLoc,
2634  AutoreleasePoolBody.get());
2635 }
2636 
2637 /// StashAwayMethodOrFunctionBodyTokens - Consume the tokens and store them
2638 /// for later parsing.
2639 void Parser::StashAwayMethodOrFunctionBodyTokens(Decl *MDecl) {
2640  if (SkipFunctionBodies && (!MDecl || Actions.canSkipFunctionBody(MDecl)) &&
2641  trySkippingFunctionBody()) {
2642  Actions.ActOnSkippedFunctionBody(MDecl);
2643  return;
2644  }
2645 
2646  LexedMethod* LM = new LexedMethod(this, MDecl);
2647  CurParsedObjCImpl->LateParsedObjCMethods.push_back(LM);
2648  CachedTokens &Toks = LM->Toks;
2649  // Begin by storing the '{' or 'try' or ':' token.
2650  Toks.push_back(Tok);
2651  if (Tok.is(tok::kw_try)) {
2652  ConsumeToken();
2653  if (Tok.is(tok::colon)) {
2654  Toks.push_back(Tok);
2655  ConsumeToken();
2656  while (Tok.isNot(tok::l_brace)) {
2657  ConsumeAndStoreUntil(tok::l_paren, Toks, /*StopAtSemi=*/false);
2658  ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
2659  }
2660  }
2661  Toks.push_back(Tok); // also store '{'
2662  }
2663  else if (Tok.is(tok::colon)) {
2664  ConsumeToken();
2665  // FIXME: This is wrong, due to C++11 braced initialization.
2666  while (Tok.isNot(tok::l_brace)) {
2667  ConsumeAndStoreUntil(tok::l_paren, Toks, /*StopAtSemi=*/false);
2668  ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
2669  }
2670  Toks.push_back(Tok); // also store '{'
2671  }
2672  ConsumeBrace();
2673  // Consume everything up to (and including) the matching right brace.
2674  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
2675  while (Tok.is(tok::kw_catch)) {
2676  ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false);
2677  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
2678  }
2679 }
2680 
2681 /// objc-method-def: objc-method-proto ';'[opt] '{' body '}'
2682 ///
2683 Decl *Parser::ParseObjCMethodDefinition() {
2684  Decl *MDecl = ParseObjCMethodPrototype();
2685 
2686  PrettyDeclStackTraceEntry CrashInfo(Actions.Context, MDecl, Tok.getLocation(),
2687  "parsing Objective-C method");
2688 
2689  // parse optional ';'
2690  if (Tok.is(tok::semi)) {
2691  if (CurParsedObjCImpl) {
2692  Diag(Tok, diag::warn_semicolon_before_method_body)
2693  << FixItHint::CreateRemoval(Tok.getLocation());
2694  }
2695  ConsumeToken();
2696  }
2697 
2698  // We should have an opening brace now.
2699  if (Tok.isNot(tok::l_brace)) {
2700  Diag(Tok, diag::err_expected_method_body);
2701 
2702  // Skip over garbage, until we get to '{'. Don't eat the '{'.
2703  SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
2704 
2705  // If we didn't find the '{', bail out.
2706  if (Tok.isNot(tok::l_brace))
2707  return nullptr;
2708  }
2709 
2710  if (!MDecl) {
2711  ConsumeBrace();
2712  SkipUntil(tok::r_brace);
2713  return nullptr;
2714  }
2715 
2716  // Allow the rest of sema to find private method decl implementations.
2717  Actions.AddAnyMethodToGlobalPool(MDecl);
2718  assert (CurParsedObjCImpl
2719  && "ParseObjCMethodDefinition - Method out of @implementation");
2720  // Consume the tokens and store them for later parsing.
2721  StashAwayMethodOrFunctionBodyTokens(MDecl);
2722  return MDecl;
2723 }
2724 
2725 StmtResult Parser::ParseObjCAtStatement(SourceLocation AtLoc,
2726  ParsedStmtContext StmtCtx) {
2727  if (Tok.is(tok::code_completion)) {
2728  Actions.CodeCompleteObjCAtStatement(getCurScope());
2729  cutOffParsing();
2730  return StmtError();
2731  }
2732 
2733  if (Tok.isObjCAtKeyword(tok::objc_try))
2734  return ParseObjCTryStmt(AtLoc);
2735 
2736  if (Tok.isObjCAtKeyword(tok::objc_throw))
2737  return ParseObjCThrowStmt(AtLoc);
2738 
2739  if (Tok.isObjCAtKeyword(tok::objc_synchronized))
2740  return ParseObjCSynchronizedStmt(AtLoc);
2741 
2742  if (Tok.isObjCAtKeyword(tok::objc_autoreleasepool))
2743  return ParseObjCAutoreleasePoolStmt(AtLoc);
2744 
2745  if (Tok.isObjCAtKeyword(tok::objc_import) &&
2746  getLangOpts().DebuggerSupport) {
2747  SkipUntil(tok::semi);
2748  return Actions.ActOnNullStmt(Tok.getLocation());
2749  }
2750 
2751  ExprStatementTokLoc = AtLoc;
2752  ExprResult Res(ParseExpressionWithLeadingAt(AtLoc));
2753  if (Res.isInvalid()) {
2754  // If the expression is invalid, skip ahead to the next semicolon. Not
2755  // doing this opens us up to the possibility of infinite loops if
2756  // ParseExpression does not consume any tokens.
2757  SkipUntil(tok::semi);
2758  return StmtError();
2759  }
2760 
2761  // Otherwise, eat the semicolon.
2762  ExpectAndConsumeSemi(diag::err_expected_semi_after_expr);
2763  return handleExprStmt(Res, StmtCtx);
2764 }
2765 
2766 ExprResult Parser::ParseObjCAtExpression(SourceLocation AtLoc) {
2767  switch (Tok.getKind()) {
2768  case tok::code_completion:
2769  Actions.CodeCompleteObjCAtExpression(getCurScope());
2770  cutOffParsing();
2771  return ExprError();
2772 
2773  case tok::minus:
2774  case tok::plus: {
2775  tok::TokenKind Kind = Tok.getKind();
2776  SourceLocation OpLoc = ConsumeToken();
2777 
2778  if (!Tok.is(tok::numeric_constant)) {
2779  const char *Symbol = nullptr;
2780  switch (Kind) {
2781  case tok::minus: Symbol = "-"; break;
2782  case tok::plus: Symbol = "+"; break;
2783  default: llvm_unreachable("missing unary operator case");
2784  }
2785  Diag(Tok, diag::err_nsnumber_nonliteral_unary)
2786  << Symbol;
2787  return ExprError();
2788  }
2789 
2790  ExprResult Lit(Actions.ActOnNumericConstant(Tok));
2791  if (Lit.isInvalid()) {
2792  return Lit;
2793  }
2794  ConsumeToken(); // Consume the literal token.
2795 
2796  Lit = Actions.ActOnUnaryOp(getCurScope(), OpLoc, Kind, Lit.get());
2797  if (Lit.isInvalid())
2798  return Lit;
2799 
2800  return ParsePostfixExpressionSuffix(
2801  Actions.BuildObjCNumericLiteral(AtLoc, Lit.get()));
2802  }
2803 
2804  case tok::string_literal: // primary-expression: string-literal
2805  case tok::wide_string_literal:
2806  return ParsePostfixExpressionSuffix(ParseObjCStringLiteral(AtLoc));
2807 
2808  case tok::char_constant:
2809  return ParsePostfixExpressionSuffix(ParseObjCCharacterLiteral(AtLoc));
2810 
2811  case tok::numeric_constant:
2812  return ParsePostfixExpressionSuffix(ParseObjCNumericLiteral(AtLoc));
2813 
2814  case tok::kw_true: // Objective-C++, etc.
2815  case tok::kw___objc_yes: // c/c++/objc/objc++ __objc_yes
2816  return ParsePostfixExpressionSuffix(ParseObjCBooleanLiteral(AtLoc, true));
2817  case tok::kw_false: // Objective-C++, etc.
2818  case tok::kw___objc_no: // c/c++/objc/objc++ __objc_no
2819  return ParsePostfixExpressionSuffix(ParseObjCBooleanLiteral(AtLoc, false));
2820 
2821  case tok::l_square:
2822  // Objective-C array literal
2823  return ParsePostfixExpressionSuffix(ParseObjCArrayLiteral(AtLoc));
2824 
2825  case tok::l_brace:
2826  // Objective-C dictionary literal
2827  return ParsePostfixExpressionSuffix(ParseObjCDictionaryLiteral(AtLoc));
2828 
2829  case tok::l_paren:
2830  // Objective-C boxed expression
2831  return ParsePostfixExpressionSuffix(ParseObjCBoxedExpr(AtLoc));
2832 
2833  default:
2834  if (Tok.getIdentifierInfo() == nullptr)
2835  return ExprError(Diag(AtLoc, diag::err_unexpected_at));
2836 
2837  switch (Tok.getIdentifierInfo()->getObjCKeywordID()) {
2838  case tok::objc_encode:
2839  return ParsePostfixExpressionSuffix(ParseObjCEncodeExpression(AtLoc));
2840  case tok::objc_protocol:
2841  return ParsePostfixExpressionSuffix(ParseObjCProtocolExpression(AtLoc));
2842  case tok::objc_selector:
2843  return ParsePostfixExpressionSuffix(ParseObjCSelectorExpression(AtLoc));
2844  case tok::objc_available:
2845  return ParseAvailabilityCheckExpr(AtLoc);
2846  default: {
2847  const char *str = nullptr;
2848  // Only provide the @try/@finally/@autoreleasepool fixit when we're sure
2849  // that this is a proper statement where such directives could actually
2850  // occur.
2851  if (GetLookAheadToken(1).is(tok::l_brace) &&
2852  ExprStatementTokLoc == AtLoc) {
2853  char ch = Tok.getIdentifierInfo()->getNameStart()[0];
2854  str =
2855  ch == 't' ? "try"
2856  : (ch == 'f' ? "finally"
2857  : (ch == 'a' ? "autoreleasepool" : nullptr));
2858  }
2859  if (str) {
2860  SourceLocation kwLoc = Tok.getLocation();
2861  return ExprError(Diag(AtLoc, diag::err_unexpected_at) <<
2862  FixItHint::CreateReplacement(kwLoc, str));
2863  }
2864  else
2865  return ExprError(Diag(AtLoc, diag::err_unexpected_at));
2866  }
2867  }
2868  }
2869 }
2870 
2871 /// Parse the receiver of an Objective-C++ message send.
2872 ///
2873 /// This routine parses the receiver of a message send in
2874 /// Objective-C++ either as a type or as an expression. Note that this
2875 /// routine must not be called to parse a send to 'super', since it
2876 /// has no way to return such a result.
2877 ///
2878 /// \param IsExpr Whether the receiver was parsed as an expression.
2879 ///
2880 /// \param TypeOrExpr If the receiver was parsed as an expression (\c
2881 /// IsExpr is true), the parsed expression. If the receiver was parsed
2882 /// as a type (\c IsExpr is false), the parsed type.
2883 ///
2884 /// \returns True if an error occurred during parsing or semantic
2885 /// analysis, in which case the arguments do not have valid
2886 /// values. Otherwise, returns false for a successful parse.
2887 ///
2888 /// objc-receiver: [C++]
2889 /// 'super' [not parsed here]
2890 /// expression
2891 /// simple-type-specifier
2892 /// typename-specifier
2893 bool Parser::ParseObjCXXMessageReceiver(bool &IsExpr, void *&TypeOrExpr) {
2894  InMessageExpressionRAIIObject InMessage(*this, true);
2895 
2896  if (Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw_typename,
2897  tok::annot_cxxscope))
2899 
2900  if (!Actions.isSimpleTypeSpecifier(Tok.getKind())) {
2901  // objc-receiver:
2902  // expression
2903  // Make sure any typos in the receiver are corrected or diagnosed, so that
2904  // proper recovery can happen. FIXME: Perhaps filter the corrected expr to
2905  // only the things that are valid ObjC receivers?
2906  ExprResult Receiver = Actions.CorrectDelayedTyposInExpr(ParseExpression());
2907  if (Receiver.isInvalid())
2908  return true;
2909 
2910  IsExpr = true;
2911  TypeOrExpr = Receiver.get();
2912  return false;
2913  }
2914 
2915  // objc-receiver:
2916  // typename-specifier
2917  // simple-type-specifier
2918  // expression (that starts with one of the above)
2919  DeclSpec DS(AttrFactory);
2920  ParseCXXSimpleTypeSpecifier(DS);
2921 
2922  if (Tok.is(tok::l_paren)) {
2923  // If we see an opening parentheses at this point, we are
2924  // actually parsing an expression that starts with a
2925  // function-style cast, e.g.,
2926  //
2927  // postfix-expression:
2928  // simple-type-specifier ( expression-list [opt] )
2929  // typename-specifier ( expression-list [opt] )
2930  //
2931  // Parse the remainder of this case, then the (optional)
2932  // postfix-expression suffix, followed by the (optional)
2933  // right-hand side of the binary expression. We have an
2934  // instance method.
2935  ExprResult Receiver = ParseCXXTypeConstructExpression(DS);
2936  if (!Receiver.isInvalid())
2937  Receiver = ParsePostfixExpressionSuffix(Receiver.get());
2938  if (!Receiver.isInvalid())
2939  Receiver = ParseRHSOfBinaryExpression(Receiver.get(), prec::Comma);
2940  if (Receiver.isInvalid())
2941  return true;
2942 
2943  IsExpr = true;
2944  TypeOrExpr = Receiver.get();
2945  return false;
2946  }
2947 
2948  // We have a class message. Turn the simple-type-specifier or
2949  // typename-specifier we parsed into a type and parse the
2950  // remainder of the class message.
2951  Declarator DeclaratorInfo(DS, DeclaratorContext::TypeNameContext);
2952  TypeResult Type = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
2953  if (Type.isInvalid())
2954  return true;
2955 
2956  IsExpr = false;
2957  TypeOrExpr = Type.get().getAsOpaquePtr();
2958  return false;
2959 }
2960 
2961 /// Determine whether the parser is currently referring to a an
2962 /// Objective-C message send, using a simplified heuristic to avoid overhead.
2963 ///
2964 /// This routine will only return true for a subset of valid message-send
2965 /// expressions.
2966 bool Parser::isSimpleObjCMessageExpression() {
2967  assert(Tok.is(tok::l_square) && getLangOpts().ObjC &&
2968  "Incorrect start for isSimpleObjCMessageExpression");
2969  return GetLookAheadToken(1).is(tok::identifier) &&
2970  GetLookAheadToken(2).is(tok::identifier);
2971 }
2972 
2973 bool Parser::isStartOfObjCClassMessageMissingOpenBracket() {
2974  if (!getLangOpts().ObjC || !NextToken().is(tok::identifier) ||
2975  InMessageExpression)
2976  return false;
2977 
2978  ParsedType Type;
2979 
2980  if (Tok.is(tok::annot_typename))
2981  Type = getTypeAnnotation(Tok);
2982  else if (Tok.is(tok::identifier))
2983  Type = Actions.getTypeName(*Tok.getIdentifierInfo(), Tok.getLocation(),
2984  getCurScope());
2985  else
2986  return false;
2987 
2988  if (!Type.get().isNull() && Type.get()->isObjCObjectOrInterfaceType()) {
2989  const Token &AfterNext = GetLookAheadToken(2);
2990  if (AfterNext.isOneOf(tok::colon, tok::r_square)) {
2991  if (Tok.is(tok::identifier))
2993 
2994  return Tok.is(tok::annot_typename);
2995  }
2996  }
2997 
2998  return false;
2999 }
3000 
3001 /// objc-message-expr:
3002 /// '[' objc-receiver objc-message-args ']'
3003 ///
3004 /// objc-receiver: [C]
3005 /// 'super'
3006 /// expression
3007 /// class-name
3008 /// type-name
3009 ///
3010 ExprResult Parser::ParseObjCMessageExpression() {
3011  assert(Tok.is(tok::l_square) && "'[' expected");
3012  SourceLocation LBracLoc = ConsumeBracket(); // consume '['
3013 
3014  if (Tok.is(tok::code_completion)) {
3015  Actions.CodeCompleteObjCMessageReceiver(getCurScope());
3016  cutOffParsing();
3017  return ExprError();
3018  }
3019 
3020  InMessageExpressionRAIIObject InMessage(*this, true);
3021 
3022  if (getLangOpts().CPlusPlus) {
3023  // We completely separate the C and C++ cases because C++ requires
3024  // more complicated (read: slower) parsing.
3025 
3026  // Handle send to super.
3027  // FIXME: This doesn't benefit from the same typo-correction we
3028  // get in Objective-C.
3029  if (Tok.is(tok::identifier) && Tok.getIdentifierInfo() == Ident_super &&
3030  NextToken().isNot(tok::period) && getCurScope()->isInObjcMethodScope())
3031  return ParseObjCMessageExpressionBody(LBracLoc, ConsumeToken(), nullptr,
3032  nullptr);
3033 
3034  // Parse the receiver, which is either a type or an expression.
3035  bool IsExpr;
3036  void *TypeOrExpr = nullptr;
3037  if (ParseObjCXXMessageReceiver(IsExpr, TypeOrExpr)) {
3038  SkipUntil(tok::r_square, StopAtSemi);
3039  return ExprError();
3040  }
3041 
3042  if (IsExpr)
3043  return ParseObjCMessageExpressionBody(LBracLoc, SourceLocation(), nullptr,
3044  static_cast<Expr *>(TypeOrExpr));
3045 
3046  return ParseObjCMessageExpressionBody(LBracLoc, SourceLocation(),
3047  ParsedType::getFromOpaquePtr(TypeOrExpr),
3048  nullptr);
3049  }
3050 
3051  if (Tok.is(tok::identifier)) {
3052  IdentifierInfo *Name = Tok.getIdentifierInfo();
3053  SourceLocation NameLoc = Tok.getLocation();
3054  ParsedType ReceiverType;
3055  switch (Actions.getObjCMessageKind(getCurScope(), Name, NameLoc,
3056  Name == Ident_super,
3057  NextToken().is(tok::period),
3058  ReceiverType)) {
3060  return ParseObjCMessageExpressionBody(LBracLoc, ConsumeToken(), nullptr,
3061  nullptr);
3062 
3064  if (!ReceiverType) {
3065  SkipUntil(tok::r_square, StopAtSemi);
3066  return ExprError();
3067  }
3068 
3069  ConsumeToken(); // the type name
3070 
3071  // Parse type arguments and protocol qualifiers.
3072  if (Tok.is(tok::less)) {
3073  SourceLocation NewEndLoc;
3074  TypeResult NewReceiverType
3075  = parseObjCTypeArgsAndProtocolQualifiers(NameLoc, ReceiverType,
3076  /*consumeLastToken=*/true,
3077  NewEndLoc);
3078  if (!NewReceiverType.isUsable()) {
3079  SkipUntil(tok::r_square, StopAtSemi);
3080  return ExprError();
3081  }
3082 
3083  ReceiverType = NewReceiverType.get();
3084  }
3085 
3086  return ParseObjCMessageExpressionBody(LBracLoc, SourceLocation(),
3087  ReceiverType, nullptr);
3088 
3090  // Fall through to parse an expression.
3091  break;
3092  }
3093  }
3094 
3095  // Otherwise, an arbitrary expression can be the receiver of a send.
3096  ExprResult Res = Actions.CorrectDelayedTyposInExpr(ParseExpression());
3097  if (Res.isInvalid()) {
3098  SkipUntil(tok::r_square, StopAtSemi);
3099  return Res;
3100  }
3101 
3102  return ParseObjCMessageExpressionBody(LBracLoc, SourceLocation(), nullptr,
3103  Res.get());
3104 }
3105 
3106 /// Parse the remainder of an Objective-C message following the
3107 /// '[' objc-receiver.
3108 ///
3109 /// This routine handles sends to super, class messages (sent to a
3110 /// class name), and instance messages (sent to an object), and the
3111 /// target is represented by \p SuperLoc, \p ReceiverType, or \p
3112 /// ReceiverExpr, respectively. Only one of these parameters may have
3113 /// a valid value.
3114 ///
3115 /// \param LBracLoc The location of the opening '['.
3116 ///
3117 /// \param SuperLoc If this is a send to 'super', the location of the
3118 /// 'super' keyword that indicates a send to the superclass.
3119 ///
3120 /// \param ReceiverType If this is a class message, the type of the
3121 /// class we are sending a message to.
3122 ///
3123 /// \param ReceiverExpr If this is an instance message, the expression
3124 /// used to compute the receiver object.
3125 ///
3126 /// objc-message-args:
3127 /// objc-selector
3128 /// objc-keywordarg-list
3129 ///
3130 /// objc-keywordarg-list:
3131 /// objc-keywordarg
3132 /// objc-keywordarg-list objc-keywordarg
3133 ///
3134 /// objc-keywordarg:
3135 /// selector-name[opt] ':' objc-keywordexpr
3136 ///
3137 /// objc-keywordexpr:
3138 /// nonempty-expr-list
3139 ///
3140 /// nonempty-expr-list:
3141 /// assignment-expression
3142 /// nonempty-expr-list , assignment-expression
3143 ///
3144 ExprResult
3145 Parser::ParseObjCMessageExpressionBody(SourceLocation LBracLoc,
3146  SourceLocation SuperLoc,
3147  ParsedType ReceiverType,
3148  Expr *ReceiverExpr) {
3149  InMessageExpressionRAIIObject InMessage(*this, true);
3150 
3151  if (Tok.is(tok::code_completion)) {
3152  if (SuperLoc.isValid())
3153  Actions.CodeCompleteObjCSuperMessage(getCurScope(), SuperLoc, None,
3154  false);
3155  else if (ReceiverType)
3156  Actions.CodeCompleteObjCClassMessage(getCurScope(), ReceiverType, None,
3157  false);
3158  else
3159  Actions.CodeCompleteObjCInstanceMessage(getCurScope(), ReceiverExpr,
3160  None, false);
3161  cutOffParsing();
3162  return ExprError();
3163  }
3164 
3165  // Parse objc-selector
3166  SourceLocation Loc;
3167  IdentifierInfo *selIdent = ParseObjCSelectorPiece(Loc);
3168 
3171  ExprVector KeyExprs;
3172 
3173  if (Tok.is(tok::colon)) {
3174  while (1) {
3175  // Each iteration parses a single keyword argument.
3176  KeyIdents.push_back(selIdent);
3177  KeyLocs.push_back(Loc);
3178 
3179  if (ExpectAndConsume(tok::colon)) {
3180  // We must manually skip to a ']', otherwise the expression skipper will
3181  // stop at the ']' when it skips to the ';'. We want it to skip beyond
3182  // the enclosing expression.
3183  SkipUntil(tok::r_square, StopAtSemi);
3184  return ExprError();
3185  }
3186 
3187  /// Parse the expression after ':'
3188 
3189  if (Tok.is(tok::code_completion)) {
3190  if (SuperLoc.isValid())
3191  Actions.CodeCompleteObjCSuperMessage(getCurScope(), SuperLoc,
3192  KeyIdents,
3193  /*AtArgumentExpression=*/true);
3194  else if (ReceiverType)
3195  Actions.CodeCompleteObjCClassMessage(getCurScope(), ReceiverType,
3196  KeyIdents,
3197  /*AtArgumentExpression=*/true);
3198  else
3199  Actions.CodeCompleteObjCInstanceMessage(getCurScope(), ReceiverExpr,
3200  KeyIdents,
3201  /*AtArgumentExpression=*/true);
3202 
3203  cutOffParsing();
3204  return ExprError();
3205  }
3206 
3207  ExprResult Expr;
3208  if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
3209  Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
3210  Expr = ParseBraceInitializer();
3211  } else
3212  Expr = ParseAssignmentExpression();
3213 
3214  ExprResult Res(Expr);
3215  if (Res.isInvalid()) {
3216  // We must manually skip to a ']', otherwise the expression skipper will
3217  // stop at the ']' when it skips to the ';'. We want it to skip beyond
3218  // the enclosing expression.
3219  SkipUntil(tok::r_square, StopAtSemi);
3220  return Res;
3221  }
3222 
3223  // We have a valid expression.
3224  KeyExprs.push_back(Res.get());
3225 
3226  // Code completion after each argument.
3227  if (Tok.is(tok::code_completion)) {
3228  if (SuperLoc.isValid())
3229  Actions.CodeCompleteObjCSuperMessage(getCurScope(), SuperLoc,
3230  KeyIdents,
3231  /*AtArgumentExpression=*/false);
3232  else if (ReceiverType)
3233  Actions.CodeCompleteObjCClassMessage(getCurScope(), ReceiverType,
3234  KeyIdents,
3235  /*AtArgumentExpression=*/false);
3236  else
3237  Actions.CodeCompleteObjCInstanceMessage(getCurScope(), ReceiverExpr,
3238  KeyIdents,
3239  /*AtArgumentExpression=*/false);
3240  cutOffParsing();
3241  return ExprError();
3242  }
3243 
3244  // Check for another keyword selector.
3245  selIdent = ParseObjCSelectorPiece(Loc);
3246  if (!selIdent && Tok.isNot(tok::colon))
3247  break;
3248  // We have a selector or a colon, continue parsing.
3249  }
3250  // Parse the, optional, argument list, comma separated.
3251  while (Tok.is(tok::comma)) {
3252  SourceLocation commaLoc = ConsumeToken(); // Eat the ','.
3253  /// Parse the expression after ','
3255  if (Tok.is(tok::colon))
3256  Res = Actions.CorrectDelayedTyposInExpr(Res);
3257  if (Res.isInvalid()) {
3258  if (Tok.is(tok::colon)) {
3259  Diag(commaLoc, diag::note_extra_comma_message_arg) <<
3260  FixItHint::CreateRemoval(commaLoc);
3261  }
3262  // We must manually skip to a ']', otherwise the expression skipper will
3263  // stop at the ']' when it skips to the ';'. We want it to skip beyond
3264  // the enclosing expression.
3265  SkipUntil(tok::r_square, StopAtSemi);
3266  return Res;
3267  }
3268 
3269  // We have a valid expression.
3270  KeyExprs.push_back(Res.get());
3271  }
3272  } else if (!selIdent) {
3273  Diag(Tok, diag::err_expected) << tok::identifier; // missing selector name.
3274 
3275  // We must manually skip to a ']', otherwise the expression skipper will
3276  // stop at the ']' when it skips to the ';'. We want it to skip beyond
3277  // the enclosing expression.
3278  SkipUntil(tok::r_square, StopAtSemi);
3279  return ExprError();
3280  }
3281 
3282  if (Tok.isNot(tok::r_square)) {
3283  Diag(Tok, diag::err_expected)
3284  << (Tok.is(tok::identifier) ? tok::colon : tok::r_square);
3285  // We must manually skip to a ']', otherwise the expression skipper will
3286  // stop at the ']' when it skips to the ';'. We want it to skip beyond
3287  // the enclosing expression.
3288  SkipUntil(tok::r_square, StopAtSemi);
3289  return ExprError();
3290  }
3291 
3292  SourceLocation RBracLoc = ConsumeBracket(); // consume ']'
3293 
3294  unsigned nKeys = KeyIdents.size();
3295  if (nKeys == 0) {
3296  KeyIdents.push_back(selIdent);
3297  KeyLocs.push_back(Loc);
3298  }
3299  Selector Sel = PP.getSelectorTable().getSelector(nKeys, &KeyIdents[0]);
3300 
3301  if (SuperLoc.isValid())
3302  return Actions.ActOnSuperMessage(getCurScope(), SuperLoc, Sel,
3303  LBracLoc, KeyLocs, RBracLoc, KeyExprs);
3304  else if (ReceiverType)
3305  return Actions.ActOnClassMessage(getCurScope(), ReceiverType, Sel,
3306  LBracLoc, KeyLocs, RBracLoc, KeyExprs);
3307  return Actions.ActOnInstanceMessage(getCurScope(), ReceiverExpr, Sel,
3308  LBracLoc, KeyLocs, RBracLoc, KeyExprs);
3309 }
3310 
3311 ExprResult Parser::ParseObjCStringLiteral(SourceLocation AtLoc) {
3312  ExprResult Res(ParseStringLiteralExpression());
3313  if (Res.isInvalid()) return Res;
3314 
3315  // @"foo" @"bar" is a valid concatenated string. Eat any subsequent string
3316  // expressions. At this point, we know that the only valid thing that starts
3317  // with '@' is an @"".
3319  ExprVector AtStrings;
3320  AtLocs.push_back(AtLoc);
3321  AtStrings.push_back(Res.get());
3322 
3323  while (Tok.is(tok::at)) {
3324  AtLocs.push_back(ConsumeToken()); // eat the @.
3325 
3326  // Invalid unless there is a string literal.
3327  if (!isTokenStringLiteral())
3328  return ExprError(Diag(Tok, diag::err_objc_concat_string));
3329 
3330  ExprResult Lit(ParseStringLiteralExpression());
3331  if (Lit.isInvalid())
3332  return Lit;
3333 
3334  AtStrings.push_back(Lit.get());
3335  }
3336 
3337  return Actions.ParseObjCStringLiteral(AtLocs.data(), AtStrings);
3338 }
3339 
3340 /// ParseObjCBooleanLiteral -
3341 /// objc-scalar-literal : '@' boolean-keyword
3342 /// ;
3343 /// boolean-keyword: 'true' | 'false' | '__objc_yes' | '__objc_no'
3344 /// ;
3345 ExprResult Parser::ParseObjCBooleanLiteral(SourceLocation AtLoc,
3346  bool ArgValue) {
3347  SourceLocation EndLoc = ConsumeToken(); // consume the keyword.
3348  return Actions.ActOnObjCBoolLiteral(AtLoc, EndLoc, ArgValue);
3349 }
3350 
3351 /// ParseObjCCharacterLiteral -
3352 /// objc-scalar-literal : '@' character-literal
3353 /// ;
3354 ExprResult Parser::ParseObjCCharacterLiteral(SourceLocation AtLoc) {
3355  ExprResult Lit(Actions.ActOnCharacterConstant(Tok));
3356  if (Lit.isInvalid()) {
3357  return Lit;
3358  }
3359  ConsumeToken(); // Consume the literal token.
3360  return Actions.BuildObjCNumericLiteral(AtLoc, Lit.get());
3361 }
3362 
3363 /// ParseObjCNumericLiteral -
3364 /// objc-scalar-literal : '@' scalar-literal
3365 /// ;
3366 /// scalar-literal : | numeric-constant /* any numeric constant. */
3367 /// ;
3368 ExprResult Parser::ParseObjCNumericLiteral(SourceLocation AtLoc) {
3369  ExprResult Lit(Actions.ActOnNumericConstant(Tok));
3370  if (Lit.isInvalid()) {
3371  return Lit;
3372  }
3373  ConsumeToken(); // Consume the literal token.
3374  return Actions.BuildObjCNumericLiteral(AtLoc, Lit.get());
3375 }
3376 
3377 /// ParseObjCBoxedExpr -
3378 /// objc-box-expression:
3379 /// @( assignment-expression )
3380 ExprResult
3381 Parser::ParseObjCBoxedExpr(SourceLocation AtLoc) {
3382  if (Tok.isNot(tok::l_paren))
3383  return ExprError(Diag(Tok, diag::err_expected_lparen_after) << "@");
3384 
3385  BalancedDelimiterTracker T(*this, tok::l_paren);
3386  T.consumeOpen();
3388  if (T.consumeClose())
3389  return ExprError();
3390 
3391  if (ValueExpr.isInvalid())
3392  return ExprError();
3393 
3394  // Wrap the sub-expression in a parenthesized expression, to distinguish
3395  // a boxed expression from a literal.
3396  SourceLocation LPLoc = T.getOpenLocation(), RPLoc = T.getCloseLocation();
3397  ValueExpr = Actions.ActOnParenExpr(LPLoc, RPLoc, ValueExpr.get());
3398  return Actions.BuildObjCBoxedExpr(SourceRange(AtLoc, RPLoc),
3399  ValueExpr.get());
3400 }
3401 
3402 ExprResult Parser::ParseObjCArrayLiteral(SourceLocation AtLoc) {
3403  ExprVector ElementExprs; // array elements.
3404  ConsumeBracket(); // consume the l_square.
3405 
3406  bool HasInvalidEltExpr = false;
3407  while (Tok.isNot(tok::r_square)) {
3408  // Parse list of array element expressions (all must be id types).
3410  if (Res.isInvalid()) {
3411  // We must manually skip to a ']', otherwise the expression skipper will
3412  // stop at the ']' when it skips to the ';'. We want it to skip beyond
3413  // the enclosing expression.
3414  SkipUntil(tok::r_square, StopAtSemi);
3415  return Res;
3416  }
3417 
3418  Res = Actions.CorrectDelayedTyposInExpr(Res.get());
3419  if (Res.isInvalid())
3420  HasInvalidEltExpr = true;
3421 
3422  // Parse the ellipsis that indicates a pack expansion.
3423  if (Tok.is(tok::ellipsis))
3424  Res = Actions.ActOnPackExpansion(Res.get(), ConsumeToken());
3425  if (Res.isInvalid())
3426  HasInvalidEltExpr = true;
3427 
3428  ElementExprs.push_back(Res.get());
3429 
3430  if (Tok.is(tok::comma))
3431  ConsumeToken(); // Eat the ','.
3432  else if (Tok.isNot(tok::r_square))
3433  return ExprError(Diag(Tok, diag::err_expected_either) << tok::r_square
3434  << tok::comma);
3435  }
3436  SourceLocation EndLoc = ConsumeBracket(); // location of ']'
3437 
3438  if (HasInvalidEltExpr)
3439  return ExprError();
3440 
3441  MultiExprArg Args(ElementExprs);
3442  return Actions.BuildObjCArrayLiteral(SourceRange(AtLoc, EndLoc), Args);
3443 }
3444 
3445 ExprResult Parser::ParseObjCDictionaryLiteral(SourceLocation AtLoc) {
3446  SmallVector<ObjCDictionaryElement, 4> Elements; // dictionary elements.
3447  ConsumeBrace(); // consume the l_square.
3448  bool HasInvalidEltExpr = false;
3449  while (Tok.isNot(tok::r_brace)) {
3450  // Parse the comma separated key : value expressions.
3451  ExprResult KeyExpr;
3452  {
3454  KeyExpr = ParseAssignmentExpression();
3455  if (KeyExpr.isInvalid()) {
3456  // We must manually skip to a '}', otherwise the expression skipper will
3457  // stop at the '}' when it skips to the ';'. We want it to skip beyond
3458  // the enclosing expression.
3459  SkipUntil(tok::r_brace, StopAtSemi);
3460  return KeyExpr;
3461  }
3462  }
3463 
3464  if (ExpectAndConsume(tok::colon)) {
3465  SkipUntil(tok::r_brace, StopAtSemi);
3466  return ExprError();
3467  }
3468 
3470  if (ValueExpr.isInvalid()) {
3471  // We must manually skip to a '}', otherwise the expression skipper will
3472  // stop at the '}' when it skips to the ';'. We want it to skip beyond
3473  // the enclosing expression.
3474  SkipUntil(tok::r_brace, StopAtSemi);
3475  return ValueExpr;
3476  }
3477 
3478  // Check the key and value for possible typos
3479  KeyExpr = Actions.CorrectDelayedTyposInExpr(KeyExpr.get());
3480  ValueExpr = Actions.CorrectDelayedTyposInExpr(ValueExpr.get());
3481  if (KeyExpr.isInvalid() || ValueExpr.isInvalid())
3482  HasInvalidEltExpr = true;
3483 
3484  // Parse the ellipsis that designates this as a pack expansion. Do not
3485  // ActOnPackExpansion here, leave it to template instantiation time where
3486  // we can get better diagnostics.
3487  SourceLocation EllipsisLoc;
3488  if (getLangOpts().CPlusPlus)
3489  TryConsumeToken(tok::ellipsis, EllipsisLoc);
3490 
3491  // We have a valid expression. Collect it in a vector so we can
3492  // build the argument list.
3493  ObjCDictionaryElement Element = {
3494  KeyExpr.get(), ValueExpr.get(), EllipsisLoc, None
3495  };
3496  Elements.push_back(Element);
3497 
3498  if (!TryConsumeToken(tok::comma) && Tok.isNot(tok::r_brace))
3499  return ExprError(Diag(Tok, diag::err_expected_either) << tok::r_brace
3500  << tok::comma);
3501  }
3502  SourceLocation EndLoc = ConsumeBrace();
3503 
3504  if (HasInvalidEltExpr)
3505  return ExprError();
3506 
3507  // Create the ObjCDictionaryLiteral.
3508  return Actions.BuildObjCDictionaryLiteral(SourceRange(AtLoc, EndLoc),
3509  Elements);
3510 }
3511 
3512 /// objc-encode-expression:
3513 /// \@encode ( type-name )
3514 ExprResult
3515 Parser::ParseObjCEncodeExpression(SourceLocation AtLoc) {
3516  assert(Tok.isObjCAtKeyword(tok::objc_encode) && "Not an @encode expression!");
3517 
3518  SourceLocation EncLoc = ConsumeToken();
3519 
3520  if (Tok.isNot(tok::l_paren))
3521  return ExprError(Diag(Tok, diag::err_expected_lparen_after) << "@encode");
3522 
3523  BalancedDelimiterTracker T(*this, tok::l_paren);
3524  T.consumeOpen();
3525 
3526  TypeResult Ty = ParseTypeName();
3527 
3528  T.consumeClose();
3529 
3530  if (Ty.isInvalid())
3531  return ExprError();
3532 
3533  return Actions.ParseObjCEncodeExpression(AtLoc, EncLoc, T.getOpenLocation(),
3534  Ty.get(), T.getCloseLocation());
3535 }
3536 
3537 /// objc-protocol-expression
3538 /// \@protocol ( protocol-name )
3539 ExprResult
3540 Parser::ParseObjCProtocolExpression(SourceLocation AtLoc) {
3541  SourceLocation ProtoLoc = ConsumeToken();
3542 
3543  if (Tok.isNot(tok::l_paren))
3544  return ExprError(Diag(Tok, diag::err_expected_lparen_after) << "@protocol");
3545 
3546  BalancedDelimiterTracker T(*this, tok::l_paren);
3547  T.consumeOpen();
3548 
3549  if (expectIdentifier())
3550  return ExprError();
3551 
3552  IdentifierInfo *protocolId = Tok.getIdentifierInfo();
3553  SourceLocation ProtoIdLoc = ConsumeToken();
3554 
3555  T.consumeClose();
3556 
3557  return Actions.ParseObjCProtocolExpression(protocolId, AtLoc, ProtoLoc,
3558  T.getOpenLocation(), ProtoIdLoc,
3559  T.getCloseLocation());
3560 }
3561 
3562 /// objc-selector-expression
3563 /// @selector '(' '('[opt] objc-keyword-selector ')'[opt] ')'
3564 ExprResult Parser::ParseObjCSelectorExpression(SourceLocation AtLoc) {
3565  SourceLocation SelectorLoc = ConsumeToken();
3566 
3567  if (Tok.isNot(tok::l_paren))
3568  return ExprError(Diag(Tok, diag::err_expected_lparen_after) << "@selector");
3569 
3571  SourceLocation sLoc;
3572 
3573  BalancedDelimiterTracker T(*this, tok::l_paren);
3574  T.consumeOpen();
3575  bool HasOptionalParen = Tok.is(tok::l_paren);
3576  if (HasOptionalParen)
3577  ConsumeParen();
3578 
3579  if (Tok.is(tok::code_completion)) {
3580  Actions.CodeCompleteObjCSelector(getCurScope(), KeyIdents);
3581  cutOffParsing();
3582  return ExprError();
3583  }
3584 
3585  IdentifierInfo *SelIdent = ParseObjCSelectorPiece(sLoc);
3586  if (!SelIdent && // missing selector name.
3587  Tok.isNot(tok::colon) && Tok.isNot(tok::coloncolon))
3588  return ExprError(Diag(Tok, diag::err_expected) << tok::identifier);
3589 
3590  KeyIdents.push_back(SelIdent);
3591 
3592  unsigned nColons = 0;
3593  if (Tok.isNot(tok::r_paren)) {
3594  while (1) {
3595  if (TryConsumeToken(tok::coloncolon)) { // Handle :: in C++.
3596  ++nColons;
3597  KeyIdents.push_back(nullptr);
3598  } else if (ExpectAndConsume(tok::colon)) // Otherwise expect ':'.
3599  return ExprError();
3600  ++nColons;
3601 
3602  if (Tok.is(tok::r_paren))
3603  break;
3604 
3605  if (Tok.is(tok::code_completion)) {
3606  Actions.CodeCompleteObjCSelector(getCurScope(), KeyIdents);
3607  cutOffParsing();
3608  return ExprError();
3609  }
3610 
3611  // Check for another keyword selector.
3612  SourceLocation Loc;
3613  SelIdent = ParseObjCSelectorPiece(Loc);
3614  KeyIdents.push_back(SelIdent);
3615  if (!SelIdent && Tok.isNot(tok::colon) && Tok.isNot(tok::coloncolon))
3616  break;
3617  }
3618  }
3619  if (HasOptionalParen && Tok.is(tok::r_paren))
3620  ConsumeParen(); // ')'
3621  T.consumeClose();
3622  Selector Sel = PP.getSelectorTable().getSelector(nColons, &KeyIdents[0]);
3623  return Actions.ParseObjCSelectorExpression(Sel, AtLoc, SelectorLoc,
3624  T.getOpenLocation(),
3625  T.getCloseLocation(),
3626  !HasOptionalParen);
3627 }
3628 
3629 void Parser::ParseLexedObjCMethodDefs(LexedMethod &LM, bool parseMethod) {
3630  // MCDecl might be null due to error in method or c-function prototype, etc.
3631  Decl *MCDecl = LM.D;
3632  bool skip = MCDecl &&
3633  ((parseMethod && !Actions.isObjCMethodDecl(MCDecl)) ||
3634  (!parseMethod && Actions.isObjCMethodDecl(MCDecl)));
3635  if (skip)
3636  return;
3637 
3638  // Save the current token position.
3639  SourceLocation OrigLoc = Tok.getLocation();
3640 
3641  assert(!LM.Toks.empty() && "ParseLexedObjCMethodDef - Empty body!");
3642  // Store an artificial EOF token to ensure that we don't run off the end of
3643  // the method's body when we come to parse it.
3644  Token Eof;
3645  Eof.startToken();
3646  Eof.setKind(tok::eof);
3647  Eof.setEofData(MCDecl);
3648  Eof.setLocation(OrigLoc);
3649  LM.Toks.push_back(Eof);
3650  // Append the current token at the end of the new token stream so that it
3651  // doesn't get lost.
3652  LM.Toks.push_back(Tok);
3653  PP.EnterTokenStream(LM.Toks, true, /*IsReinject*/true);
3654 
3655  // Consume the previously pushed token.
3656  ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
3657 
3658  assert(Tok.isOneOf(tok::l_brace, tok::kw_try, tok::colon) &&
3659  "Inline objective-c method not starting with '{' or 'try' or ':'");
3660  // Enter a scope for the method or c-function body.
3661  ParseScope BodyScope(this, (parseMethod ? Scope::ObjCMethodScope : 0) |
3664 
3665  // Tell the actions module that we have entered a method or c-function definition
3666  // with the specified Declarator for the method/function.
3667  if (parseMethod)
3668  Actions.ActOnStartOfObjCMethodDef(getCurScope(), MCDecl);
3669  else
3670  Actions.ActOnStartOfFunctionDef(getCurScope(), MCDecl);
3671  if (Tok.is(tok::kw_try))
3672  ParseFunctionTryBlock(MCDecl, BodyScope);
3673  else {
3674  if (Tok.is(tok::colon))
3675  ParseConstructorInitializer(MCDecl);
3676  else
3677  Actions.ActOnDefaultCtorInitializers(MCDecl);
3678  ParseFunctionStatementBody(MCDecl, BodyScope);
3679  }
3680 
3681  if (Tok.getLocation() != OrigLoc) {
3682  // Due to parsing error, we either went over the cached tokens or
3683  // there are still cached tokens left. If it's the latter case skip the
3684  // leftover tokens.
3685  // Since this is an uncommon situation that should be avoided, use the
3686  // expensive isBeforeInTranslationUnit call.
3687  if (PP.getSourceManager().isBeforeInTranslationUnit(Tok.getLocation(),
3688  OrigLoc))
3689  while (Tok.getLocation() != OrigLoc && Tok.isNot(tok::eof))
3690  ConsumeAnyToken();
3691  }
3692  // Clean up the remaining EOF token.
3693  ConsumeAnyToken();
3694 }
AttributePool & getAttributePool() const
Definition: DeclSpec.h:1873
Defines the clang::ASTContext interface.
IdentifierInfo * getNullabilityKeyword(NullabilityKind nullability)
Retrieve the underscored keyword (_Nonnull, _Nullable) that corresponds to the given nullability kind...
Definition: Parser.h:500
Smart pointer class that efficiently represents Objective-C method names.
PtrTy get() const
Definition: Ownership.h:80
ExprResult ParseExpression(TypeCastState isTypeCast=NotTypeCast)
Simple precedence-based parser for binary/ternary operators.
Definition: ParseExpr.cpp:122
A (possibly-)qualified type.
Definition: Type.h:643
This is a scope that corresponds to the parameters within a function prototype.
Definition: Scope.h:81
ObjCDeclQualifier getObjCDeclQualifier() const
Definition: DeclSpec.h:843
Class to handle popping type parameters when leaving the scope.
Definition: ParseObjc.cpp:97
const DeclaratorChunk & getTypeObject(unsigned i) const
Return the specified TypeInfo from this declarator.
Definition: DeclSpec.h:2189
NullabilityKind
Describes the nullability of a particular type.
Definition: Specifiers.h:315
const llvm::Triple & getTriple() const
Returns the target triple of the primary target.
Definition: TargetInfo.h:991
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
iterator end()
Definition: DeclGroup.h:105
void setPropertyAttributes(ObjCPropertyAttributeKind PRVal)
Definition: DeclSpec.h:856
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:88
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: DeclBase.h:421
RAII object used to inform the actions that we&#39;re currently parsing a declaration.
Captures information about "declaration specifiers" specific to Objective-C.
Definition: DeclSpec.h:799
StringRef P
The base class of the type hierarchy.
Definition: Type.h:1436
SourceLocation getCloseLocation() const
This indicates that the scope corresponds to a function, which means that labels are set here...
Definition: Scope.h:47
The parameter is covariant, e.g., X<T> is a subtype of X<U> when the type parameter is covariant and ...
Wrapper for void* pointer.
Definition: Ownership.h:50
Parser - This implements a parser for the C family of languages.
Definition: Parser.h:57
const ParsedAttributes & getAttributes() const
Definition: DeclSpec.h:2419
void setObjCQualifiers(ObjCDeclSpec *quals)
Definition: DeclSpec.h:789
ActionResult< Stmt * > StmtResult
Definition: Ownership.h:264
Information about one declarator, including the parsed type information and the identifier.
Definition: DeclSpec.h:1775
bool isInObjcMethodScope() const
isInObjcMethodScope - Return true if this scope is, or is contained in, an Objective-C method body...
Definition: Scope.h:356
void setBegin(SourceLocation b)
Code completion occurs within an Objective-C implementation or category implementation.
Definition: Sema.h:10801
friend class ObjCDeclContextSwitch
Definition: Parser.h:61
const IdentifierInfo * getSetterName() const
Definition: DeclSpec.h:891
ColonProtectionRAIIObject - This sets the Parser::ColonIsSacred bool and restores it when destroyed...
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:1089
const Token & NextToken()
NextToken - This peeks ahead one token and returns it without consuming it.
Definition: Parser.h:755
bool TryConsumeToken(tok::TokenKind Expected)
Definition: Parser.h:456
The message is a class message, and the identifier is a type name.
Definition: Sema.h:8579
One of these records is kept for each identifier that is lexed.
An element in an Objective-C dictionary literal.
Definition: ExprObjC.h:261
bool isStr(const char(&Str)[StrLen]) const
Return true if this is the identifier for the specified string.
The parameter is contravariant, e.g., X<T> is a subtype of X<U> when the type parameter is covariant ...
LLVM_READONLY bool isLetter(unsigned char c)
Return true if this character is an ASCII letter: [a-zA-Z].
Definition: CharInfo.h:111
DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType=nullptr)
Definition: SemaDecl.cpp:54
Token - This structure provides full information about a lexed token.
Definition: Token.h:34
RAII class that helps handle the parsing of an open/close delimiter pair, such as braces { ...
Code completion occurs where only a type is permitted.
Definition: Sema.h:10827
bool isInvalidType() const
Definition: DeclSpec.h:2453
Values of this type can be null.
bool isObjCAtKeyword(tok::ObjCKeywordKind objcKey) const
Return true if we have an ObjC keyword identifier.
Definition: Lexer.cpp:57
static Selector constructSetterSelector(IdentifierTable &Idents, SelectorTable &SelTable, const IdentifierInfo *Name)
Return the default setter selector for the given identifier.
ParsedAttributesView ArgAttrs
ArgAttrs - Attribute list for this argument.
Definition: Sema.h:8528
static ParsedType getTypeAnnotation(const Token &Tok)
getTypeAnnotation - Read a parsed type out of an annotation token.
Definition: Parser.h:760
PtrTy get() const
Definition: Ownership.h:170
bool isNot(T Kind) const
Definition: FormatToken.h:328
Whether values of this type can be null is (explicitly) unspecified.
ObjCContainerKind
Definition: Sema.h:8298
unsigned getNumTypeObjects() const
Return the number of types applied to this declarator.
Definition: DeclSpec.h:2185
StmtResult StmtError()
Definition: Ownership.h:280
iterator begin()
Definition: DeclGroup.h:99
Values of this type can never be null.
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:40
SourceLocation ConsumeAnyToken(bool ConsumeCodeCompletionTok=false)
ConsumeAnyToken - Dispatch to the right Consume* method based on the current token type...
Definition: Parser.h:476
void addAtEnd(ParsedAttr *newAttr)
Definition: ParsedAttr.h:738
IdentifierInfo * getIdentifier() const
Definition: DeclSpec.h:2137
DeclSpec & getMutableDeclSpec()
getMutableDeclSpec - Return a non-const version of the DeclSpec.
Definition: DeclSpec.h:1871
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:328
bool acceptsObjCTypeParams() const
Determines if this is an ObjC interface type that may accept type parameters.
Definition: Type.cpp:1485
bool isOneOf(A K1, B K2) const
Definition: FormatToken.h:321
void setSetterName(IdentifierInfo *name, SourceLocation loc)
Definition: DeclSpec.h:894
const ParsedAttributesView & getAttrs() const
If there are attributes applied to this declaratorchunk, return them.
Definition: DeclSpec.h:1551
SourceLocation NameLoc
Definition: Sema.h:8521
This represents one expression.
Definition: Expr.h:108
The message is an instance message.
Definition: Sema.h:8576
This file defines the classes used to store parsed information about declaration-specifiers and decla...
ObjCTypeParamListScope(Sema &Actions, Scope *S)
Definition: ParseObjc.cpp:103
Code completion occurs within an Objective-C interface, protocol, or category.
Definition: Sema.h:10798
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:126
This is a compound statement scope.
Definition: Scope.h:130
A class for parsing a field declarator.
static void diagnoseRedundantPropertyNullability(Parser &P, ObjCDeclSpec &DS, NullabilityKind nullability, SourceLocation nullabilityLoc)
Diagnose redundant or conflicting nullability information.
Definition: ParseObjc.cpp:799
DeclaratorContext
Definition: DeclSpec.h:1733
bool isInvalid() const
Definition: Ownership.h:166
SourceLocation getOpenLocation() const
bool isUsable() const
Definition: Ownership.h:167
The result type of a method or function.
Code completion occurs within the list of instance variables in an Objective-C interface, protocol, category, or implementation.
Definition: Sema.h:10804
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:708
ObjCTypeParamVariance
Describes the variance of a given generic parameter.
Definition: DeclObjC.h:533
ObjCKeywordKind
Provides a namespace for Objective-C keywords which start with an &#39;@&#39;.
Definition: TokenKinds.h:40
RAII object that makes &#39;>&#39; behave either as an operator or as the closing angle bracket for a templat...
OpaquePtr< DeclGroupRef > DeclGroupPtrTy
Definition: Parser.h:419
PrettyDeclStackTraceEntry - If a crash occurs in the parser while parsing something related to a decl...
const LangOptions & getLangOpts() const
Definition: Parser.h:403
This is a scope that corresponds to the parameters within a function prototype for a function declara...
Definition: Scope.h:87
NullabilityKind getNullability() const
Definition: DeclSpec.h:861
A class for parsing a DeclSpec.
ObjCDeclQualifier
ObjCDeclQualifier - Qualifier used on types in method declarations.
Definition: DeclSpec.h:807
void CodeCompleteObjCAtDirective(Scope *S)
Kind
Stop skipping at semicolon.
Definition: Parser.h:1069
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:153
Encodes a location in the source.
bool TryAnnotateTypeOrScopeToken()
TryAnnotateTypeOrScopeToken - If the current token position is on a typename (possibly qualified in C...
Definition: Parser.cpp:1748
bool is(tok::TokenKind Kind) const
Definition: FormatToken.h:312
std::pair< NullabilityKind, bool > DiagNullabilityKind
A nullability kind paired with a bit indicating whether it used a context-sensitive keyword...
Definition: Diagnostic.h:1285
This is a scope that corresponds to the Objective-C @catch statement.
Definition: Scope.h:91
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:179
ParsedAttr - Represents a syntactic attribute.
Definition: ParsedAttr.h:117
const char * getNameStart() const
Return the beginning of the actual null-terminated string for this identifier.
ObjCPropertyAttributeKind getPropertyAttributes() const
Definition: DeclSpec.h:853
The message is sent to &#39;super&#39;.
Definition: Sema.h:8574
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:24
void remove(ParsedAttr *ToBeRemoved)
Definition: ParsedAttr.h:743
Scope * getCurScope() const
Definition: Parser.h:410
tok::ObjCKeywordKind getObjCKeywordID() const
Return the ObjC keyword kind.
Definition: Lexer.cpp:66
void popObjCTypeParamList(Scope *S, ObjCTypeParamList *typeParamList)
The scope of a struct/union/class definition.
Definition: Scope.h:65
bool isNot(tok::TokenKind K) const
Definition: Token.h:98
ObjCDeclSpec DeclSpec
Definition: Sema.h:8525
Dataflow Directional Tag Classes.
std::pair< IdentifierInfo *, SourceLocation > IdentifierLocPair
A simple pair of identifier info and location.
bool isValid() const
Return true if this is a valid SourceLocation object.
static FixItHint CreateRemoval(CharSourceRange RemoveRange)
Create a code modification hint that removes the given source range.
Definition: Diagnostic.h:118
void takeAllFrom(AttributePool &pool)
Take the given pool&#39;s allocations and add them to this pool.
Definition: ParsedAttr.h:642
bool isOneOf(tok::TokenKind K1, tok::TokenKind K2) const
Definition: Token.h:99
SkipUntilFlags
Control flags for SkipUntil functions.
Definition: Parser.h:1068
void setObjCDeclQualifier(ObjCDeclQualifier DQVal)
Definition: DeclSpec.h:846
const TargetInfo & getTargetInfo() const
Definition: Parser.h:404
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Definition: Parser.cpp:72
SourceLocation getNullabilityLoc() const
Definition: DeclSpec.h:868
void setNullability(SourceLocation loc, NullabilityKind kind)
Definition: DeclSpec.h:875
ExprResult ParseAssignmentExpression(TypeCastState isTypeCast=NotTypeCast)
Parse an expr that doesn&#39;t include (top-level) commas.
Definition: ParseExpr.cpp:159
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:92
This is a scope that can contain a declaration.
Definition: Scope.h:59
bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, unsigned &DiagID, const PrintingPolicy &Policy)
Definition: DeclSpec.cpp:787
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2143
X
Add a minimal nested name specifier fixit hint to allow lookup of a tag name from an outer enclosing ...
Definition: SemaDecl.cpp:14579
Captures information about "declaration specifiers".
Definition: DeclSpec.h:228
void setEnd(SourceLocation e)
SourceLocation ConsumeToken()
ConsumeToken - Consume the current &#39;peek token&#39; and lex the next one.
Definition: Parser.h:448
const DeclSpec & getDeclSpec() const
getDeclSpec - Return the declaration-specifier that this declarator was declared with.
Definition: DeclSpec.h:1864
Stores a list of Objective-C type parameters for a parameterized class or a category/extension thereo...
Definition: DeclObjC.h:636
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:129
AttributePool & getPool() const
Definition: ParsedAttr.h:829
ExprResult ExprError()
Definition: Ownership.h:279
Context-sensitive version of a keyword attribute.
const IdentifierInfo * getGetterName() const
Definition: DeclSpec.h:883
ParamInfo - An array of paraminfo objects is allocated whenever a function declarator is parsed...
Definition: DeclSpec.h:1234
static void addContextSensitiveTypeNullability(Parser &P, Declarator &D, NullabilityKind nullability, SourceLocation nullabilityLoc, bool &addedToDeclSpec)
Add an attribute for a context-sensitive type nullability to the given declarator.
Definition: ParseObjc.cpp:371
A trivial tuple used to represent a source range.
static void takeDeclAttributes(ParsedAttributesView &attrs, ParsedAttributesView &from)
Take all the decl attributes out of the given list and add them to the given attribute set...
Definition: ParseObjc.cpp:1204
void setGetterName(IdentifierInfo *name, SourceLocation loc)
Definition: DeclSpec.h:886
void enter(ObjCTypeParamList *P)
Definition: ParseObjc.cpp:110
bool isObjCAtKeyword(tok::ObjCKeywordKind Kind) const
Definition: FormatToken.h:363
static OpaquePtr getFromOpaquePtr(void *P)
Definition: Ownership.h:91
AttributePool & getAttributePool() const
Definition: DeclSpec.h:745
SourceLocation getBegin() const
ParsedAttributes - A collection of parsed attributes.
Definition: ParsedAttr.h:824
SourceLocation ColonLoc
Location of &#39;:&#39;.
Definition: OpenMPClause.h:107
This scope corresponds to an Objective-C method body.
Definition: Scope.h:95
The parameter is invariant: must match exactly.
TypeResult ParseTypeName(SourceRange *Range=nullptr, DeclaratorContext Context=DeclaratorContext::TypeNameContext, AccessSpecifier AS=AS_none, Decl **OwnedType=nullptr, ParsedAttributes *Attrs=nullptr)
ParseTypeName type-name: [C99 6.7.6] specifier-qualifier-list abstract-declarator[opt].
Definition: ParseDecl.cpp:42
ParsedAttributes & getAttributes()
Definition: DeclSpec.h:772
IdentifierInfo * Name
Definition: Sema.h:8520
void startToken()
Reset all flags to cleared.
Definition: Token.h:171
Stop skipping at specified token, but don&#39;t skip the token itself.
Definition: Parser.h:1071