clang  10.0.0git
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 /// direct
826 /// readonly
827 /// readwrite
828 /// assign
829 /// retain
830 /// copy
831 /// nonatomic
832 /// atomic
833 /// strong
834 /// weak
835 /// unsafe_unretained
836 /// nonnull
837 /// nullable
838 /// null_unspecified
839 /// null_resettable
840 /// class
841 ///
842 void Parser::ParseObjCPropertyAttribute(ObjCDeclSpec &DS) {
843  assert(Tok.getKind() == tok::l_paren);
844  BalancedDelimiterTracker T(*this, tok::l_paren);
845  T.consumeOpen();
846 
847  while (1) {
848  if (Tok.is(tok::code_completion)) {
849  Actions.CodeCompleteObjCPropertyFlags(getCurScope(), DS);
850  return cutOffParsing();
851  }
852  const IdentifierInfo *II = Tok.getIdentifierInfo();
853 
854  // If this is not an identifier at all, bail out early.
855  if (!II) {
856  T.consumeClose();
857  return;
858  }
859 
860  SourceLocation AttrName = ConsumeToken(); // consume last attribute name
861 
862  if (II->isStr("readonly"))
864  else if (II->isStr("assign"))
866  else if (II->isStr("unsafe_unretained"))
868  else if (II->isStr("readwrite"))
870  else if (II->isStr("retain"))
872  else if (II->isStr("strong"))
874  else if (II->isStr("copy"))
876  else if (II->isStr("nonatomic"))
878  else if (II->isStr("atomic"))
880  else if (II->isStr("weak"))
882  else if (II->isStr("getter") || II->isStr("setter")) {
883  bool IsSetter = II->getNameStart()[0] == 's';
884 
885  // getter/setter require extra treatment.
886  unsigned DiagID = IsSetter ? diag::err_objc_expected_equal_for_setter :
887  diag::err_objc_expected_equal_for_getter;
888 
889  if (ExpectAndConsume(tok::equal, DiagID)) {
890  SkipUntil(tok::r_paren, StopAtSemi);
891  return;
892  }
893 
894  if (Tok.is(tok::code_completion)) {
895  if (IsSetter)
896  Actions.CodeCompleteObjCPropertySetter(getCurScope());
897  else
898  Actions.CodeCompleteObjCPropertyGetter(getCurScope());
899  return cutOffParsing();
900  }
901 
902  SourceLocation SelLoc;
903  IdentifierInfo *SelIdent = ParseObjCSelectorPiece(SelLoc);
904 
905  if (!SelIdent) {
906  Diag(Tok, diag::err_objc_expected_selector_for_getter_setter)
907  << IsSetter;
908  SkipUntil(tok::r_paren, StopAtSemi);
909  return;
910  }
911 
912  if (IsSetter) {
914  DS.setSetterName(SelIdent, SelLoc);
915 
916  if (ExpectAndConsume(tok::colon,
917  diag::err_expected_colon_after_setter_name)) {
918  SkipUntil(tok::r_paren, StopAtSemi);
919  return;
920  }
921  } else {
923  DS.setGetterName(SelIdent, SelLoc);
924  }
925  } else if (II->isStr("nonnull")) {
929  Tok.getLocation());
931  DS.setNullability(Tok.getLocation(), NullabilityKind::NonNull);
932  } else if (II->isStr("nullable")) {
936  Tok.getLocation());
938  DS.setNullability(Tok.getLocation(), NullabilityKind::Nullable);
939  } else if (II->isStr("null_unspecified")) {
943  Tok.getLocation());
945  DS.setNullability(Tok.getLocation(), NullabilityKind::Unspecified);
946  } else if (II->isStr("null_resettable")) {
950  Tok.getLocation());
952  DS.setNullability(Tok.getLocation(), NullabilityKind::Unspecified);
953 
954  // Also set the null_resettable bit.
956  } else if (II->isStr("class")) {
958  } else if (II->isStr("direct")) {
960  } else {
961  Diag(AttrName, diag::err_objc_expected_property_attr) << II;
962  SkipUntil(tok::r_paren, StopAtSemi);
963  return;
964  }
965 
966  if (Tok.isNot(tok::comma))
967  break;
968 
969  ConsumeToken();
970  }
971 
972  T.consumeClose();
973 }
974 
975 /// objc-method-proto:
976 /// objc-instance-method objc-method-decl objc-method-attributes[opt]
977 /// objc-class-method objc-method-decl objc-method-attributes[opt]
978 ///
979 /// objc-instance-method: '-'
980 /// objc-class-method: '+'
981 ///
982 /// objc-method-attributes: [OBJC2]
983 /// __attribute__((deprecated))
984 ///
985 Decl *Parser::ParseObjCMethodPrototype(tok::ObjCKeywordKind MethodImplKind,
986  bool MethodDefinition) {
987  assert(Tok.isOneOf(tok::minus, tok::plus) && "expected +/-");
988 
989  tok::TokenKind methodType = Tok.getKind();
990  SourceLocation mLoc = ConsumeToken();
991  Decl *MDecl = ParseObjCMethodDecl(mLoc, methodType, MethodImplKind,
992  MethodDefinition);
993  // Since this rule is used for both method declarations and definitions,
994  // the caller is (optionally) responsible for consuming the ';'.
995  return MDecl;
996 }
997 
998 /// objc-selector:
999 /// identifier
1000 /// one of
1001 /// enum struct union if else while do for switch case default
1002 /// break continue return goto asm sizeof typeof __alignof
1003 /// unsigned long const short volatile signed restrict _Complex
1004 /// in out inout bycopy byref oneway int char float double void _Bool
1005 ///
1006 IdentifierInfo *Parser::ParseObjCSelectorPiece(SourceLocation &SelectorLoc) {
1007 
1008  switch (Tok.getKind()) {
1009  default:
1010  return nullptr;
1011  case tok::colon:
1012  // Empty selector piece uses the location of the ':'.
1013  SelectorLoc = Tok.getLocation();
1014  return nullptr;
1015  case tok::ampamp:
1016  case tok::ampequal:
1017  case tok::amp:
1018  case tok::pipe:
1019  case tok::tilde:
1020  case tok::exclaim:
1021  case tok::exclaimequal:
1022  case tok::pipepipe:
1023  case tok::pipeequal:
1024  case tok::caret:
1025  case tok::caretequal: {
1026  std::string ThisTok(PP.getSpelling(Tok));
1027  if (isLetter(ThisTok[0])) {
1028  IdentifierInfo *II = &PP.getIdentifierTable().get(ThisTok);
1029  Tok.setKind(tok::identifier);
1030  SelectorLoc = ConsumeToken();
1031  return II;
1032  }
1033  return nullptr;
1034  }
1035 
1036  case tok::identifier:
1037  case tok::kw_asm:
1038  case tok::kw_auto:
1039  case tok::kw_bool:
1040  case tok::kw_break:
1041  case tok::kw_case:
1042  case tok::kw_catch:
1043  case tok::kw_char:
1044  case tok::kw_class:
1045  case tok::kw_const:
1046  case tok::kw_const_cast:
1047  case tok::kw_continue:
1048  case tok::kw_default:
1049  case tok::kw_delete:
1050  case tok::kw_do:
1051  case tok::kw_double:
1052  case tok::kw_dynamic_cast:
1053  case tok::kw_else:
1054  case tok::kw_enum:
1055  case tok::kw_explicit:
1056  case tok::kw_export:
1057  case tok::kw_extern:
1058  case tok::kw_false:
1059  case tok::kw_float:
1060  case tok::kw_for:
1061  case tok::kw_friend:
1062  case tok::kw_goto:
1063  case tok::kw_if:
1064  case tok::kw_inline:
1065  case tok::kw_int:
1066  case tok::kw_long:
1067  case tok::kw_mutable:
1068  case tok::kw_namespace:
1069  case tok::kw_new:
1070  case tok::kw_operator:
1071  case tok::kw_private:
1072  case tok::kw_protected:
1073  case tok::kw_public:
1074  case tok::kw_register:
1075  case tok::kw_reinterpret_cast:
1076  case tok::kw_restrict:
1077  case tok::kw_return:
1078  case tok::kw_short:
1079  case tok::kw_signed:
1080  case tok::kw_sizeof:
1081  case tok::kw_static:
1082  case tok::kw_static_cast:
1083  case tok::kw_struct:
1084  case tok::kw_switch:
1085  case tok::kw_template:
1086  case tok::kw_this:
1087  case tok::kw_throw:
1088  case tok::kw_true:
1089  case tok::kw_try:
1090  case tok::kw_typedef:
1091  case tok::kw_typeid:
1092  case tok::kw_typename:
1093  case tok::kw_typeof:
1094  case tok::kw_union:
1095  case tok::kw_unsigned:
1096  case tok::kw_using:
1097  case tok::kw_virtual:
1098  case tok::kw_void:
1099  case tok::kw_volatile:
1100  case tok::kw_wchar_t:
1101  case tok::kw_while:
1102  case tok::kw__Bool:
1103  case tok::kw__Complex:
1104  case tok::kw___alignof:
1105  case tok::kw___auto_type:
1106  IdentifierInfo *II = Tok.getIdentifierInfo();
1107  SelectorLoc = ConsumeToken();
1108  return II;
1109  }
1110 }
1111 
1112 /// objc-for-collection-in: 'in'
1113 ///
1114 bool Parser::isTokIdentifier_in() const {
1115  // FIXME: May have to do additional look-ahead to only allow for
1116  // valid tokens following an 'in'; such as an identifier, unary operators,
1117  // '[' etc.
1118  return (getLangOpts().ObjC && Tok.is(tok::identifier) &&
1119  Tok.getIdentifierInfo() == ObjCTypeQuals[objc_in]);
1120 }
1121 
1122 /// ParseObjCTypeQualifierList - This routine parses the objective-c's type
1123 /// qualifier list and builds their bitmask representation in the input
1124 /// argument.
1125 ///
1126 /// objc-type-qualifiers:
1127 /// objc-type-qualifier
1128 /// objc-type-qualifiers objc-type-qualifier
1129 ///
1130 /// objc-type-qualifier:
1131 /// 'in'
1132 /// 'out'
1133 /// 'inout'
1134 /// 'oneway'
1135 /// 'bycopy'
1136 /// 'byref'
1137 /// 'nonnull'
1138 /// 'nullable'
1139 /// 'null_unspecified'
1140 ///
1141 void Parser::ParseObjCTypeQualifierList(ObjCDeclSpec &DS,
1142  DeclaratorContext Context) {
1143  assert(Context == DeclaratorContext::ObjCParameterContext ||
1145 
1146  while (1) {
1147  if (Tok.is(tok::code_completion)) {
1148  Actions.CodeCompleteObjCPassingType(getCurScope(), DS,
1150  return cutOffParsing();
1151  }
1152 
1153  if (Tok.isNot(tok::identifier))
1154  return;
1155 
1156  const IdentifierInfo *II = Tok.getIdentifierInfo();
1157  for (unsigned i = 0; i != objc_NumQuals; ++i) {
1158  if (II != ObjCTypeQuals[i] ||
1159  NextToken().is(tok::less) ||
1160  NextToken().is(tok::coloncolon))
1161  continue;
1162 
1165  switch (i) {
1166  default: llvm_unreachable("Unknown decl qualifier");
1167  case objc_in: Qual = ObjCDeclSpec::DQ_In; break;
1168  case objc_out: Qual = ObjCDeclSpec::DQ_Out; break;
1169  case objc_inout: Qual = ObjCDeclSpec::DQ_Inout; break;
1170  case objc_oneway: Qual = ObjCDeclSpec::DQ_Oneway; break;
1171  case objc_bycopy: Qual = ObjCDeclSpec::DQ_Bycopy; break;
1172  case objc_byref: Qual = ObjCDeclSpec::DQ_Byref; break;
1173 
1174  case objc_nonnull:
1176  Nullability = NullabilityKind::NonNull;
1177  break;
1178 
1179  case objc_nullable:
1181  Nullability = NullabilityKind::Nullable;
1182  break;
1183 
1184  case objc_null_unspecified:
1186  Nullability = NullabilityKind::Unspecified;
1187  break;
1188  }
1189 
1190  // FIXME: Diagnose redundant specifiers.
1191  DS.setObjCDeclQualifier(Qual);
1192  if (Qual == ObjCDeclSpec::DQ_CSNullability)
1193  DS.setNullability(Tok.getLocation(), Nullability);
1194 
1195  ConsumeToken();
1196  II = nullptr;
1197  break;
1198  }
1199 
1200  // If this wasn't a recognized qualifier, bail out.
1201  if (II) return;
1202  }
1203 }
1204 
1205 /// Take all the decl attributes out of the given list and add
1206 /// them to the given attribute set.
1208  ParsedAttributesView &from) {
1209  for (auto &AL : llvm::reverse(from)) {
1210  if (!AL.isUsedAsTypeAttr()) {
1211  from.remove(&AL);
1212  attrs.addAtEnd(&AL);
1213  }
1214  }
1215 }
1216 
1217 /// takeDeclAttributes - Take all the decl attributes from the given
1218 /// declarator and add them to the given list.
1220  Declarator &D) {
1221  // First, take ownership of all attributes.
1222  attrs.getPool().takeAllFrom(D.getAttributePool());
1224 
1225  // Now actually move the attributes over.
1227  takeDeclAttributes(attrs, D.getAttributes());
1228  for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i)
1229  takeDeclAttributes(attrs, D.getTypeObject(i).getAttrs());
1230 }
1231 
1232 /// objc-type-name:
1233 /// '(' objc-type-qualifiers[opt] type-name ')'
1234 /// '(' objc-type-qualifiers[opt] ')'
1235 ///
1236 ParsedType Parser::ParseObjCTypeName(ObjCDeclSpec &DS,
1237  DeclaratorContext context,
1238  ParsedAttributes *paramAttrs) {
1239  assert(context == DeclaratorContext::ObjCParameterContext ||
1241  assert((paramAttrs != nullptr) ==
1243 
1244  assert(Tok.is(tok::l_paren) && "expected (");
1245 
1246  BalancedDelimiterTracker T(*this, tok::l_paren);
1247  T.consumeOpen();
1248 
1249  ObjCDeclContextSwitch ObjCDC(*this);
1250 
1251  // Parse type qualifiers, in, inout, etc.
1252  ParseObjCTypeQualifierList(DS, context);
1253  SourceLocation TypeStartLoc = Tok.getLocation();
1254 
1255  ParsedType Ty;
1256  if (isTypeSpecifierQualifier() || isObjCInstancetype()) {
1257  // Parse an abstract declarator.
1258  DeclSpec declSpec(AttrFactory);
1259  declSpec.setObjCQualifiers(&DS);
1260  DeclSpecContext dsContext = DeclSpecContext::DSC_normal;
1261  if (context == DeclaratorContext::ObjCResultContext)
1262  dsContext = DeclSpecContext::DSC_objc_method_result;
1263  ParseSpecifierQualifierList(declSpec, AS_none, dsContext);
1264  Declarator declarator(declSpec, context);
1265  ParseDeclarator(declarator);
1266 
1267  // If that's not invalid, extract a type.
1268  if (!declarator.isInvalidType()) {
1269  // Map a nullability specifier to a context-sensitive keyword attribute.
1270  bool addedToDeclSpec = false;
1272  addContextSensitiveTypeNullability(*this, declarator,
1273  DS.getNullability(),
1274  DS.getNullabilityLoc(),
1275  addedToDeclSpec);
1276 
1277  TypeResult type = Actions.ActOnTypeName(getCurScope(), declarator);
1278  if (!type.isInvalid())
1279  Ty = type.get();
1280 
1281  // If we're parsing a parameter, steal all the decl attributes
1282  // and add them to the decl spec.
1284  takeDeclAttributes(*paramAttrs, declarator);
1285  }
1286  }
1287 
1288  if (Tok.is(tok::r_paren))
1289  T.consumeClose();
1290  else if (Tok.getLocation() == TypeStartLoc) {
1291  // If we didn't eat any tokens, then this isn't a type.
1292  Diag(Tok, diag::err_expected_type);
1293  SkipUntil(tok::r_paren, StopAtSemi);
1294  } else {
1295  // Otherwise, we found *something*, but didn't get a ')' in the right
1296  // place. Emit an error then return what we have as the type.
1297  T.consumeClose();
1298  }
1299  return Ty;
1300 }
1301 
1302 /// objc-method-decl:
1303 /// objc-selector
1304 /// objc-keyword-selector objc-parmlist[opt]
1305 /// objc-type-name objc-selector
1306 /// objc-type-name objc-keyword-selector objc-parmlist[opt]
1307 ///
1308 /// objc-keyword-selector:
1309 /// objc-keyword-decl
1310 /// objc-keyword-selector objc-keyword-decl
1311 ///
1312 /// objc-keyword-decl:
1313 /// objc-selector ':' objc-type-name objc-keyword-attributes[opt] identifier
1314 /// objc-selector ':' objc-keyword-attributes[opt] identifier
1315 /// ':' objc-type-name objc-keyword-attributes[opt] identifier
1316 /// ':' objc-keyword-attributes[opt] identifier
1317 ///
1318 /// objc-parmlist:
1319 /// objc-parms objc-ellipsis[opt]
1320 ///
1321 /// objc-parms:
1322 /// objc-parms , parameter-declaration
1323 ///
1324 /// objc-ellipsis:
1325 /// , ...
1326 ///
1327 /// objc-keyword-attributes: [OBJC2]
1328 /// __attribute__((unused))
1329 ///
1330 Decl *Parser::ParseObjCMethodDecl(SourceLocation mLoc,
1331  tok::TokenKind mType,
1332  tok::ObjCKeywordKind MethodImplKind,
1333  bool MethodDefinition) {
1335 
1336  if (Tok.is(tok::code_completion)) {
1337  Actions.CodeCompleteObjCMethodDecl(getCurScope(), mType == tok::minus,
1338  /*ReturnType=*/nullptr);
1339  cutOffParsing();
1340  return nullptr;
1341  }
1342 
1343  // Parse the return type if present.
1344  ParsedType ReturnType;
1345  ObjCDeclSpec DSRet;
1346  if (Tok.is(tok::l_paren))
1347  ReturnType = ParseObjCTypeName(DSRet, DeclaratorContext::ObjCResultContext,
1348  nullptr);
1349 
1350  // If attributes exist before the method, parse them.
1351  ParsedAttributes methodAttrs(AttrFactory);
1352  if (getLangOpts().ObjC)
1353  MaybeParseGNUAttributes(methodAttrs);
1354  MaybeParseCXX11Attributes(methodAttrs);
1355 
1356  if (Tok.is(tok::code_completion)) {
1357  Actions.CodeCompleteObjCMethodDecl(getCurScope(), mType == tok::minus,
1358  ReturnType);
1359  cutOffParsing();
1360  return nullptr;
1361  }
1362 
1363  // Now parse the selector.
1364  SourceLocation selLoc;
1365  IdentifierInfo *SelIdent = ParseObjCSelectorPiece(selLoc);
1366 
1367  // An unnamed colon is valid.
1368  if (!SelIdent && Tok.isNot(tok::colon)) { // missing selector name.
1369  Diag(Tok, diag::err_expected_selector_for_method)
1370  << SourceRange(mLoc, Tok.getLocation());
1371  // Skip until we get a ; or @.
1372  SkipUntil(tok::at, StopAtSemi | StopBeforeMatch);
1373  return nullptr;
1374  }
1375 
1377  if (Tok.isNot(tok::colon)) {
1378  // If attributes exist after the method, parse them.
1379  if (getLangOpts().ObjC)
1380  MaybeParseGNUAttributes(methodAttrs);
1381  MaybeParseCXX11Attributes(methodAttrs);
1382 
1383  Selector Sel = PP.getSelectorTable().getNullarySelector(SelIdent);
1384  Decl *Result = Actions.ActOnMethodDeclaration(
1385  getCurScope(), mLoc, Tok.getLocation(), mType, DSRet, ReturnType,
1386  selLoc, Sel, nullptr, CParamInfo.data(), CParamInfo.size(), methodAttrs,
1387  MethodImplKind, false, MethodDefinition);
1388  PD.complete(Result);
1389  return Result;
1390  }
1391 
1395  ParseScope PrototypeScope(this, Scope::FunctionPrototypeScope |
1397 
1398  AttributePool allParamAttrs(AttrFactory);
1399  while (1) {
1400  ParsedAttributes paramAttrs(AttrFactory);
1401  Sema::ObjCArgInfo ArgInfo;
1402 
1403  // Each iteration parses a single keyword argument.
1404  if (ExpectAndConsume(tok::colon))
1405  break;
1406 
1407  ArgInfo.Type = nullptr;
1408  if (Tok.is(tok::l_paren)) // Parse the argument type if present.
1409  ArgInfo.Type = ParseObjCTypeName(ArgInfo.DeclSpec,
1411  &paramAttrs);
1412 
1413  // If attributes exist before the argument name, parse them.
1414  // Regardless, collect all the attributes we've parsed so far.
1415  if (getLangOpts().ObjC)
1416  MaybeParseGNUAttributes(paramAttrs);
1417  MaybeParseCXX11Attributes(paramAttrs);
1418  ArgInfo.ArgAttrs = paramAttrs;
1419 
1420  // Code completion for the next piece of the selector.
1421  if (Tok.is(tok::code_completion)) {
1422  KeyIdents.push_back(SelIdent);
1423  Actions.CodeCompleteObjCMethodDeclSelector(getCurScope(),
1424  mType == tok::minus,
1425  /*AtParameterName=*/true,
1426  ReturnType, KeyIdents);
1427  cutOffParsing();
1428  return nullptr;
1429  }
1430 
1431  if (expectIdentifier())
1432  break; // missing argument name.
1433 
1434  ArgInfo.Name = Tok.getIdentifierInfo();
1435  ArgInfo.NameLoc = Tok.getLocation();
1436  ConsumeToken(); // Eat the identifier.
1437 
1438  ArgInfos.push_back(ArgInfo);
1439  KeyIdents.push_back(SelIdent);
1440  KeyLocs.push_back(selLoc);
1441 
1442  // Make sure the attributes persist.
1443  allParamAttrs.takeAllFrom(paramAttrs.getPool());
1444 
1445  // Code completion for the next piece of the selector.
1446  if (Tok.is(tok::code_completion)) {
1447  Actions.CodeCompleteObjCMethodDeclSelector(getCurScope(),
1448  mType == tok::minus,
1449  /*AtParameterName=*/false,
1450  ReturnType, KeyIdents);
1451  cutOffParsing();
1452  return nullptr;
1453  }
1454 
1455  // Check for another keyword selector.
1456  SelIdent = ParseObjCSelectorPiece(selLoc);
1457  if (!SelIdent && Tok.isNot(tok::colon))
1458  break;
1459  if (!SelIdent) {
1460  SourceLocation ColonLoc = Tok.getLocation();
1461  if (PP.getLocForEndOfToken(ArgInfo.NameLoc) == ColonLoc) {
1462  Diag(ArgInfo.NameLoc, diag::warn_missing_selector_name) << ArgInfo.Name;
1463  Diag(ArgInfo.NameLoc, diag::note_missing_selector_name) << ArgInfo.Name;
1464  Diag(ColonLoc, diag::note_force_empty_selector_name) << ArgInfo.Name;
1465  }
1466  }
1467  // We have a selector or a colon, continue parsing.
1468  }
1469 
1470  bool isVariadic = false;
1471  bool cStyleParamWarned = false;
1472  // Parse the (optional) parameter list.
1473  while (Tok.is(tok::comma)) {
1474  ConsumeToken();
1475  if (Tok.is(tok::ellipsis)) {
1476  isVariadic = true;
1477  ConsumeToken();
1478  break;
1479  }
1480  if (!cStyleParamWarned) {
1481  Diag(Tok, diag::warn_cstyle_param);
1482  cStyleParamWarned = true;
1483  }
1484  DeclSpec DS(AttrFactory);
1485  ParseDeclarationSpecifiers(DS);
1486  // Parse the declarator.
1488  ParseDeclarator(ParmDecl);
1489  IdentifierInfo *ParmII = ParmDecl.getIdentifier();
1490  Decl *Param = Actions.ActOnParamDeclarator(getCurScope(), ParmDecl);
1491  CParamInfo.push_back(DeclaratorChunk::ParamInfo(ParmII,
1492  ParmDecl.getIdentifierLoc(),
1493  Param,
1494  nullptr));
1495  }
1496 
1497  // FIXME: Add support for optional parameter list...
1498  // If attributes exist after the method, parse them.
1499  if (getLangOpts().ObjC)
1500  MaybeParseGNUAttributes(methodAttrs);
1501  MaybeParseCXX11Attributes(methodAttrs);
1502 
1503  if (KeyIdents.size() == 0)
1504  return nullptr;
1505 
1506  Selector Sel = PP.getSelectorTable().getSelector(KeyIdents.size(),
1507  &KeyIdents[0]);
1508  Decl *Result = Actions.ActOnMethodDeclaration(
1509  getCurScope(), mLoc, Tok.getLocation(), mType, DSRet, ReturnType, KeyLocs,
1510  Sel, &ArgInfos[0], CParamInfo.data(), CParamInfo.size(), methodAttrs,
1511  MethodImplKind, isVariadic, MethodDefinition);
1512 
1513  PD.complete(Result);
1514  return Result;
1515 }
1516 
1517 /// objc-protocol-refs:
1518 /// '<' identifier-list '>'
1519 ///
1520 bool Parser::
1521 ParseObjCProtocolReferences(SmallVectorImpl<Decl *> &Protocols,
1522  SmallVectorImpl<SourceLocation> &ProtocolLocs,
1523  bool WarnOnDeclarations, bool ForObjCContainer,
1524  SourceLocation &LAngleLoc, SourceLocation &EndLoc,
1525  bool consumeLastToken) {
1526  assert(Tok.is(tok::less) && "expected <");
1527 
1528  LAngleLoc = ConsumeToken(); // the "<"
1529 
1530  SmallVector<IdentifierLocPair, 8> ProtocolIdents;
1531 
1532  while (1) {
1533  if (Tok.is(tok::code_completion)) {
1534  Actions.CodeCompleteObjCProtocolReferences(ProtocolIdents);
1535  cutOffParsing();
1536  return true;
1537  }
1538 
1539  if (expectIdentifier()) {
1540  SkipUntil(tok::greater, StopAtSemi);
1541  return true;
1542  }
1543  ProtocolIdents.push_back(std::make_pair(Tok.getIdentifierInfo(),
1544  Tok.getLocation()));
1545  ProtocolLocs.push_back(Tok.getLocation());
1546  ConsumeToken();
1547 
1548  if (!TryConsumeToken(tok::comma))
1549  break;
1550  }
1551 
1552  // Consume the '>'.
1553  if (ParseGreaterThanInTemplateList(EndLoc, consumeLastToken,
1554  /*ObjCGenericList=*/false))
1555  return true;
1556 
1557  // Convert the list of protocols identifiers into a list of protocol decls.
1558  Actions.FindProtocolDeclaration(WarnOnDeclarations, ForObjCContainer,
1559  ProtocolIdents, Protocols);
1560  return false;
1561 }
1562 
1563 TypeResult Parser::parseObjCProtocolQualifierType(SourceLocation &rAngleLoc) {
1564  assert(Tok.is(tok::less) && "Protocol qualifiers start with '<'");
1565  assert(getLangOpts().ObjC && "Protocol qualifiers only exist in Objective-C");
1566 
1567  SourceLocation lAngleLoc;
1568  SmallVector<Decl *, 8> protocols;
1569  SmallVector<SourceLocation, 8> protocolLocs;
1570  (void)ParseObjCProtocolReferences(protocols, protocolLocs, false, false,
1571  lAngleLoc, rAngleLoc,
1572  /*consumeLastToken=*/true);
1573  TypeResult result = Actions.actOnObjCProtocolQualifierType(lAngleLoc,
1574  protocols,
1575  protocolLocs,
1576  rAngleLoc);
1577  if (result.isUsable()) {
1578  Diag(lAngleLoc, diag::warn_objc_protocol_qualifier_missing_id)
1579  << FixItHint::CreateInsertion(lAngleLoc, "id")
1580  << SourceRange(lAngleLoc, rAngleLoc);
1581  }
1582 
1583  return result;
1584 }
1585 
1586 /// Parse Objective-C type arguments or protocol qualifiers.
1587 ///
1588 /// objc-type-arguments:
1589 /// '<' type-name '...'[opt] (',' type-name '...'[opt])* '>'
1590 ///
1591 void Parser::parseObjCTypeArgsOrProtocolQualifiers(
1592  ParsedType baseType,
1593  SourceLocation &typeArgsLAngleLoc,
1594  SmallVectorImpl<ParsedType> &typeArgs,
1595  SourceLocation &typeArgsRAngleLoc,
1596  SourceLocation &protocolLAngleLoc,
1597  SmallVectorImpl<Decl *> &protocols,
1598  SmallVectorImpl<SourceLocation> &protocolLocs,
1599  SourceLocation &protocolRAngleLoc,
1600  bool consumeLastToken,
1601  bool warnOnIncompleteProtocols) {
1602  assert(Tok.is(tok::less) && "Not at the start of type args or protocols");
1603  SourceLocation lAngleLoc = ConsumeToken();
1604 
1605  // Whether all of the elements we've parsed thus far are single
1606  // identifiers, which might be types or might be protocols.
1607  bool allSingleIdentifiers = true;
1609  SmallVectorImpl<SourceLocation> &identifierLocs = protocolLocs;
1610 
1611  // Parse a list of comma-separated identifiers, bailing out if we
1612  // see something different.
1613  do {
1614  // Parse a single identifier.
1615  if (Tok.is(tok::identifier) &&
1616  (NextToken().is(tok::comma) ||
1617  NextToken().is(tok::greater) ||
1618  NextToken().is(tok::greatergreater))) {
1619  identifiers.push_back(Tok.getIdentifierInfo());
1620  identifierLocs.push_back(ConsumeToken());
1621  continue;
1622  }
1623 
1624  if (Tok.is(tok::code_completion)) {
1625  // FIXME: Also include types here.
1626  SmallVector<IdentifierLocPair, 4> identifierLocPairs;
1627  for (unsigned i = 0, n = identifiers.size(); i != n; ++i) {
1628  identifierLocPairs.push_back(IdentifierLocPair(identifiers[i],
1629  identifierLocs[i]));
1630  }
1631 
1632  QualType BaseT = Actions.GetTypeFromParser(baseType);
1633  if (!BaseT.isNull() && BaseT->acceptsObjCTypeParams()) {
1634  Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Type);
1635  } else {
1636  Actions.CodeCompleteObjCProtocolReferences(identifierLocPairs);
1637  }
1638  cutOffParsing();
1639  return;
1640  }
1641 
1642  allSingleIdentifiers = false;
1643  break;
1644  } while (TryConsumeToken(tok::comma));
1645 
1646  // If we parsed an identifier list, semantic analysis sorts out
1647  // whether it refers to protocols or to type arguments.
1648  if (allSingleIdentifiers) {
1649  // Parse the closing '>'.
1650  SourceLocation rAngleLoc;
1651  (void)ParseGreaterThanInTemplateList(rAngleLoc, consumeLastToken,
1652  /*ObjCGenericList=*/true);
1653 
1654  // Let Sema figure out what we parsed.
1655  Actions.actOnObjCTypeArgsOrProtocolQualifiers(getCurScope(),
1656  baseType,
1657  lAngleLoc,
1658  identifiers,
1659  identifierLocs,
1660  rAngleLoc,
1661  typeArgsLAngleLoc,
1662  typeArgs,
1663  typeArgsRAngleLoc,
1664  protocolLAngleLoc,
1665  protocols,
1666  protocolRAngleLoc,
1667  warnOnIncompleteProtocols);
1668  return;
1669  }
1670 
1671  // We parsed an identifier list but stumbled into non single identifiers, this
1672  // means we might (a) check that what we already parsed is a legitimate type
1673  // (not a protocol or unknown type) and (b) parse the remaining ones, which
1674  // must all be type args.
1675 
1676  // Convert the identifiers into type arguments.
1677  bool invalid = false;
1678  IdentifierInfo *foundProtocolId = nullptr, *foundValidTypeId = nullptr;
1679  SourceLocation foundProtocolSrcLoc, foundValidTypeSrcLoc;
1680  SmallVector<IdentifierInfo *, 2> unknownTypeArgs;
1681  SmallVector<SourceLocation, 2> unknownTypeArgsLoc;
1682 
1683  for (unsigned i = 0, n = identifiers.size(); i != n; ++i) {
1684  ParsedType typeArg
1685  = Actions.getTypeName(*identifiers[i], identifierLocs[i], getCurScope());
1686  if (typeArg) {
1687  DeclSpec DS(AttrFactory);
1688  const char *prevSpec = nullptr;
1689  unsigned diagID;
1690  DS.SetTypeSpecType(TST_typename, identifierLocs[i], prevSpec, diagID,
1691  typeArg, Actions.getASTContext().getPrintingPolicy());
1692 
1693  // Form a declarator to turn this into a type.
1695  TypeResult fullTypeArg = Actions.ActOnTypeName(getCurScope(), D);
1696  if (fullTypeArg.isUsable()) {
1697  typeArgs.push_back(fullTypeArg.get());
1698  if (!foundValidTypeId) {
1699  foundValidTypeId = identifiers[i];
1700  foundValidTypeSrcLoc = identifierLocs[i];
1701  }
1702  } else {
1703  invalid = true;
1704  unknownTypeArgs.push_back(identifiers[i]);
1705  unknownTypeArgsLoc.push_back(identifierLocs[i]);
1706  }
1707  } else {
1708  invalid = true;
1709  if (!Actions.LookupProtocol(identifiers[i], identifierLocs[i])) {
1710  unknownTypeArgs.push_back(identifiers[i]);
1711  unknownTypeArgsLoc.push_back(identifierLocs[i]);
1712  } else if (!foundProtocolId) {
1713  foundProtocolId = identifiers[i];
1714  foundProtocolSrcLoc = identifierLocs[i];
1715  }
1716  }
1717  }
1718 
1719  // Continue parsing type-names.
1720  do {
1721  Token CurTypeTok = Tok;
1722  TypeResult typeArg = ParseTypeName();
1723 
1724  // Consume the '...' for a pack expansion.
1725  SourceLocation ellipsisLoc;
1726  TryConsumeToken(tok::ellipsis, ellipsisLoc);
1727  if (typeArg.isUsable() && ellipsisLoc.isValid()) {
1728  typeArg = Actions.ActOnPackExpansion(typeArg.get(), ellipsisLoc);
1729  }
1730 
1731  if (typeArg.isUsable()) {
1732  typeArgs.push_back(typeArg.get());
1733  if (!foundValidTypeId) {
1734  foundValidTypeId = CurTypeTok.getIdentifierInfo();
1735  foundValidTypeSrcLoc = CurTypeTok.getLocation();
1736  }
1737  } else {
1738  invalid = true;
1739  }
1740  } while (TryConsumeToken(tok::comma));
1741 
1742  // Diagnose the mix between type args and protocols.
1743  if (foundProtocolId && foundValidTypeId)
1744  Actions.DiagnoseTypeArgsAndProtocols(foundProtocolId, foundProtocolSrcLoc,
1745  foundValidTypeId,
1746  foundValidTypeSrcLoc);
1747 
1748  // Diagnose unknown arg types.
1749  ParsedType T;
1750  if (unknownTypeArgs.size())
1751  for (unsigned i = 0, e = unknownTypeArgsLoc.size(); i < e; ++i)
1752  Actions.DiagnoseUnknownTypeName(unknownTypeArgs[i], unknownTypeArgsLoc[i],
1753  getCurScope(), nullptr, T);
1754 
1755  // Parse the closing '>'.
1756  SourceLocation rAngleLoc;
1757  (void)ParseGreaterThanInTemplateList(rAngleLoc, consumeLastToken,
1758  /*ObjCGenericList=*/true);
1759 
1760  if (invalid) {
1761  typeArgs.clear();
1762  return;
1763  }
1764 
1765  // Record left/right angle locations.
1766  typeArgsLAngleLoc = lAngleLoc;
1767  typeArgsRAngleLoc = rAngleLoc;
1768 }
1769 
1770 void Parser::parseObjCTypeArgsAndProtocolQualifiers(
1771  ParsedType baseType,
1772  SourceLocation &typeArgsLAngleLoc,
1773  SmallVectorImpl<ParsedType> &typeArgs,
1774  SourceLocation &typeArgsRAngleLoc,
1775  SourceLocation &protocolLAngleLoc,
1776  SmallVectorImpl<Decl *> &protocols,
1777  SmallVectorImpl<SourceLocation> &protocolLocs,
1778  SourceLocation &protocolRAngleLoc,
1779  bool consumeLastToken) {
1780  assert(Tok.is(tok::less));
1781 
1782  // Parse the first angle-bracket-delimited clause.
1783  parseObjCTypeArgsOrProtocolQualifiers(baseType,
1784  typeArgsLAngleLoc,
1785  typeArgs,
1786  typeArgsRAngleLoc,
1787  protocolLAngleLoc,
1788  protocols,
1789  protocolLocs,
1790  protocolRAngleLoc,
1791  consumeLastToken,
1792  /*warnOnIncompleteProtocols=*/false);
1793  if (Tok.is(tok::eof)) // Nothing else to do here...
1794  return;
1795 
1796  // An Objective-C object pointer followed by type arguments
1797  // can then be followed again by a set of protocol references, e.g.,
1798  // \c NSArray<NSView><NSTextDelegate>
1799  if ((consumeLastToken && Tok.is(tok::less)) ||
1800  (!consumeLastToken && NextToken().is(tok::less))) {
1801  // If we aren't consuming the last token, the prior '>' is still hanging
1802  // there. Consume it before we parse the protocol qualifiers.
1803  if (!consumeLastToken)
1804  ConsumeToken();
1805 
1806  if (!protocols.empty()) {
1807  SkipUntilFlags skipFlags = SkipUntilFlags();
1808  if (!consumeLastToken)
1809  skipFlags = skipFlags | StopBeforeMatch;
1810  Diag(Tok, diag::err_objc_type_args_after_protocols)
1811  << SourceRange(protocolLAngleLoc, protocolRAngleLoc);
1812  SkipUntil(tok::greater, tok::greatergreater, skipFlags);
1813  } else {
1814  ParseObjCProtocolReferences(protocols, protocolLocs,
1815  /*WarnOnDeclarations=*/false,
1816  /*ForObjCContainer=*/false,
1817  protocolLAngleLoc, protocolRAngleLoc,
1818  consumeLastToken);
1819  }
1820  }
1821 }
1822 
1823 TypeResult Parser::parseObjCTypeArgsAndProtocolQualifiers(
1824  SourceLocation loc,
1825  ParsedType type,
1826  bool consumeLastToken,
1827  SourceLocation &endLoc) {
1828  assert(Tok.is(tok::less));
1829  SourceLocation typeArgsLAngleLoc;
1830  SmallVector<ParsedType, 4> typeArgs;
1831  SourceLocation typeArgsRAngleLoc;
1832  SourceLocation protocolLAngleLoc;
1833  SmallVector<Decl *, 4> protocols;
1834  SmallVector<SourceLocation, 4> protocolLocs;
1835  SourceLocation protocolRAngleLoc;
1836 
1837  // Parse type arguments and protocol qualifiers.
1838  parseObjCTypeArgsAndProtocolQualifiers(type, typeArgsLAngleLoc, typeArgs,
1839  typeArgsRAngleLoc, protocolLAngleLoc,
1840  protocols, protocolLocs,
1841  protocolRAngleLoc, consumeLastToken);
1842 
1843  if (Tok.is(tok::eof))
1844  return true; // Invalid type result.
1845 
1846  // Compute the location of the last token.
1847  if (consumeLastToken)
1848  endLoc = PrevTokLocation;
1849  else
1850  endLoc = Tok.getLocation();
1851 
1852  return Actions.actOnObjCTypeArgsAndProtocolQualifiers(
1853  getCurScope(),
1854  loc,
1855  type,
1856  typeArgsLAngleLoc,
1857  typeArgs,
1858  typeArgsRAngleLoc,
1859  protocolLAngleLoc,
1860  protocols,
1861  protocolLocs,
1862  protocolRAngleLoc);
1863 }
1864 
1865 void Parser::HelperActionsForIvarDeclarations(Decl *interfaceDecl, SourceLocation atLoc,
1867  SmallVectorImpl<Decl *> &AllIvarDecls,
1868  bool RBraceMissing) {
1869  if (!RBraceMissing)
1870  T.consumeClose();
1871 
1872  Actions.ActOnObjCContainerStartDefinition(interfaceDecl);
1873  Actions.ActOnLastBitfield(T.getCloseLocation(), AllIvarDecls);
1874  Actions.ActOnObjCContainerFinishDefinition();
1875  // Call ActOnFields() even if we don't have any decls. This is useful
1876  // for code rewriting tools that need to be aware of the empty list.
1877  Actions.ActOnFields(getCurScope(), atLoc, interfaceDecl, AllIvarDecls,
1880 }
1881 
1882 /// objc-class-instance-variables:
1883 /// '{' objc-instance-variable-decl-list[opt] '}'
1884 ///
1885 /// objc-instance-variable-decl-list:
1886 /// objc-visibility-spec
1887 /// objc-instance-variable-decl ';'
1888 /// ';'
1889 /// objc-instance-variable-decl-list objc-visibility-spec
1890 /// objc-instance-variable-decl-list objc-instance-variable-decl ';'
1891 /// objc-instance-variable-decl-list static_assert-declaration
1892 /// objc-instance-variable-decl-list ';'
1893 ///
1894 /// objc-visibility-spec:
1895 /// @private
1896 /// @protected
1897 /// @public
1898 /// @package [OBJC2]
1899 ///
1900 /// objc-instance-variable-decl:
1901 /// struct-declaration
1902 ///
1903 void Parser::ParseObjCClassInstanceVariables(Decl *interfaceDecl,
1904  tok::ObjCKeywordKind visibility,
1905  SourceLocation atLoc) {
1906  assert(Tok.is(tok::l_brace) && "expected {");
1907  SmallVector<Decl *, 32> AllIvarDecls;
1908 
1909  ParseScope ClassScope(this, Scope::DeclScope|Scope::ClassScope);
1910  ObjCDeclContextSwitch ObjCDC(*this);
1911 
1912  BalancedDelimiterTracker T(*this, tok::l_brace);
1913  T.consumeOpen();
1914  // While we still have something to read, read the instance variables.
1915  while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
1916  // Each iteration of this loop reads one objc-instance-variable-decl.
1917 
1918  // Check for extraneous top-level semicolon.
1919  if (Tok.is(tok::semi)) {
1920  ConsumeExtraSemi(InstanceVariableList);
1921  continue;
1922  }
1923 
1924  // Set the default visibility to private.
1925  if (TryConsumeToken(tok::at)) { // parse objc-visibility-spec
1926  if (Tok.is(tok::code_completion)) {
1927  Actions.CodeCompleteObjCAtVisibility(getCurScope());
1928  return cutOffParsing();
1929  }
1930 
1931  switch (Tok.getObjCKeywordID()) {
1932  case tok::objc_private:
1933  case tok::objc_public:
1934  case tok::objc_protected:
1935  case tok::objc_package:
1936  visibility = Tok.getObjCKeywordID();
1937  ConsumeToken();
1938  continue;
1939 
1940  case tok::objc_end:
1941  Diag(Tok, diag::err_objc_unexpected_atend);
1942  Tok.setLocation(Tok.getLocation().getLocWithOffset(-1));
1943  Tok.setKind(tok::at);
1944  Tok.setLength(1);
1945  PP.EnterToken(Tok, /*IsReinject*/true);
1946  HelperActionsForIvarDeclarations(interfaceDecl, atLoc,
1947  T, AllIvarDecls, true);
1948  return;
1949 
1950  default:
1951  Diag(Tok, diag::err_objc_illegal_visibility_spec);
1952  continue;
1953  }
1954  }
1955 
1956  if (Tok.is(tok::code_completion)) {
1957  Actions.CodeCompleteOrdinaryName(getCurScope(),
1959  return cutOffParsing();
1960  }
1961 
1962  // This needs to duplicate a small amount of code from
1963  // ParseStructUnionBody() for things that should work in both
1964  // C struct and in Objective-C class instance variables.
1965  if (Tok.isOneOf(tok::kw_static_assert, tok::kw__Static_assert)) {
1966  SourceLocation DeclEnd;
1967  ParseStaticAssertDeclaration(DeclEnd);
1968  continue;
1969  }
1970 
1971  auto ObjCIvarCallback = [&](ParsingFieldDeclarator &FD) {
1972  Actions.ActOnObjCContainerStartDefinition(interfaceDecl);
1973  // Install the declarator into the interface decl.
1974  FD.D.setObjCIvar(true);
1975  Decl *Field = Actions.ActOnIvar(
1976  getCurScope(), FD.D.getDeclSpec().getSourceRange().getBegin(), FD.D,
1977  FD.BitfieldSize, visibility);
1978  Actions.ActOnObjCContainerFinishDefinition();
1979  if (Field)
1980  AllIvarDecls.push_back(Field);
1981  FD.complete(Field);
1982  };
1983 
1984  // Parse all the comma separated declarators.
1985  ParsingDeclSpec DS(*this);
1986  ParseStructDeclaration(DS, ObjCIvarCallback);
1987 
1988  if (Tok.is(tok::semi)) {
1989  ConsumeToken();
1990  } else {
1991  Diag(Tok, diag::err_expected_semi_decl_list);
1992  // Skip to end of block or statement
1993  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
1994  }
1995  }
1996  HelperActionsForIvarDeclarations(interfaceDecl, atLoc,
1997  T, AllIvarDecls, false);
1998 }
1999 
2000 /// objc-protocol-declaration:
2001 /// objc-protocol-definition
2002 /// objc-protocol-forward-reference
2003 ///
2004 /// objc-protocol-definition:
2005 /// \@protocol identifier
2006 /// objc-protocol-refs[opt]
2007 /// objc-interface-decl-list
2008 /// \@end
2009 ///
2010 /// objc-protocol-forward-reference:
2011 /// \@protocol identifier-list ';'
2012 ///
2013 /// "\@protocol identifier ;" should be resolved as "\@protocol
2014 /// identifier-list ;": objc-interface-decl-list may not start with a
2015 /// semicolon in the first alternative if objc-protocol-refs are omitted.
2017 Parser::ParseObjCAtProtocolDeclaration(SourceLocation AtLoc,
2018  ParsedAttributes &attrs) {
2019  assert(Tok.isObjCAtKeyword(tok::objc_protocol) &&
2020  "ParseObjCAtProtocolDeclaration(): Expected @protocol");
2021  ConsumeToken(); // the "protocol" identifier
2022 
2023  if (Tok.is(tok::code_completion)) {
2024  Actions.CodeCompleteObjCProtocolDecl(getCurScope());
2025  cutOffParsing();
2026  return nullptr;
2027  }
2028 
2029  MaybeSkipAttributes(tok::objc_protocol);
2030 
2031  if (expectIdentifier())
2032  return nullptr; // missing protocol name.
2033  // Save the protocol name, then consume it.
2034  IdentifierInfo *protocolName = Tok.getIdentifierInfo();
2035  SourceLocation nameLoc = ConsumeToken();
2036 
2037  if (TryConsumeToken(tok::semi)) { // forward declaration of one protocol.
2038  IdentifierLocPair ProtoInfo(protocolName, nameLoc);
2039  return Actions.ActOnForwardProtocolDeclaration(AtLoc, ProtoInfo, attrs);
2040  }
2041 
2042  CheckNestedObjCContexts(AtLoc);
2043 
2044  if (Tok.is(tok::comma)) { // list of forward declarations.
2045  SmallVector<IdentifierLocPair, 8> ProtocolRefs;
2046  ProtocolRefs.push_back(std::make_pair(protocolName, nameLoc));
2047 
2048  // Parse the list of forward declarations.
2049  while (1) {
2050  ConsumeToken(); // the ','
2051  if (expectIdentifier()) {
2052  SkipUntil(tok::semi);
2053  return nullptr;
2054  }
2055  ProtocolRefs.push_back(IdentifierLocPair(Tok.getIdentifierInfo(),
2056  Tok.getLocation()));
2057  ConsumeToken(); // the identifier
2058 
2059  if (Tok.isNot(tok::comma))
2060  break;
2061  }
2062  // Consume the ';'.
2063  if (ExpectAndConsume(tok::semi, diag::err_expected_after, "@protocol"))
2064  return nullptr;
2065 
2066  return Actions.ActOnForwardProtocolDeclaration(AtLoc, ProtocolRefs, attrs);
2067  }
2068 
2069  // Last, and definitely not least, parse a protocol declaration.
2070  SourceLocation LAngleLoc, EndProtoLoc;
2071 
2072  SmallVector<Decl *, 8> ProtocolRefs;
2073  SmallVector<SourceLocation, 8> ProtocolLocs;
2074  if (Tok.is(tok::less) &&
2075  ParseObjCProtocolReferences(ProtocolRefs, ProtocolLocs, false, true,
2076  LAngleLoc, EndProtoLoc,
2077  /*consumeLastToken=*/true))
2078  return nullptr;
2079 
2080  Decl *ProtoType = Actions.ActOnStartProtocolInterface(
2081  AtLoc, protocolName, nameLoc, ProtocolRefs.data(), ProtocolRefs.size(),
2082  ProtocolLocs.data(), EndProtoLoc, attrs);
2083 
2084  ParseObjCInterfaceDeclList(tok::objc_protocol, ProtoType);
2085  return Actions.ConvertDeclToDeclGroup(ProtoType);
2086 }
2087 
2088 /// objc-implementation:
2089 /// objc-class-implementation-prologue
2090 /// objc-category-implementation-prologue
2091 ///
2092 /// objc-class-implementation-prologue:
2093 /// @implementation identifier objc-superclass[opt]
2094 /// objc-class-instance-variables[opt]
2095 ///
2096 /// objc-category-implementation-prologue:
2097 /// @implementation identifier ( identifier )
2099 Parser::ParseObjCAtImplementationDeclaration(SourceLocation AtLoc,
2100  ParsedAttributes &Attrs) {
2101  assert(Tok.isObjCAtKeyword(tok::objc_implementation) &&
2102  "ParseObjCAtImplementationDeclaration(): Expected @implementation");
2103  CheckNestedObjCContexts(AtLoc);
2104  ConsumeToken(); // the "implementation" identifier
2105 
2106  // Code completion after '@implementation'.
2107  if (Tok.is(tok::code_completion)) {
2108  Actions.CodeCompleteObjCImplementationDecl(getCurScope());
2109  cutOffParsing();
2110  return nullptr;
2111  }
2112 
2113  MaybeSkipAttributes(tok::objc_implementation);
2114 
2115  if (expectIdentifier())
2116  return nullptr; // missing class or category name.
2117  // We have a class or category name - consume it.
2118  IdentifierInfo *nameId = Tok.getIdentifierInfo();
2119  SourceLocation nameLoc = ConsumeToken(); // consume class or category name
2120  Decl *ObjCImpDecl = nullptr;
2121 
2122  // Neither a type parameter list nor a list of protocol references is
2123  // permitted here. Parse and diagnose them.
2124  if (Tok.is(tok::less)) {
2125  SourceLocation lAngleLoc, rAngleLoc;
2126  SmallVector<IdentifierLocPair, 8> protocolIdents;
2127  SourceLocation diagLoc = Tok.getLocation();
2128  ObjCTypeParamListScope typeParamScope(Actions, getCurScope());
2129  if (parseObjCTypeParamListOrProtocolRefs(typeParamScope, lAngleLoc,
2130  protocolIdents, rAngleLoc)) {
2131  Diag(diagLoc, diag::err_objc_parameterized_implementation)
2132  << SourceRange(diagLoc, PrevTokLocation);
2133  } else if (lAngleLoc.isValid()) {
2134  Diag(lAngleLoc, diag::err_unexpected_protocol_qualifier)
2135  << FixItHint::CreateRemoval(SourceRange(lAngleLoc, rAngleLoc));
2136  }
2137  }
2138 
2139  if (Tok.is(tok::l_paren)) {
2140  // we have a category implementation.
2141  ConsumeParen();
2142  SourceLocation categoryLoc, rparenLoc;
2143  IdentifierInfo *categoryId = nullptr;
2144 
2145  if (Tok.is(tok::code_completion)) {
2146  Actions.CodeCompleteObjCImplementationCategory(getCurScope(), nameId, nameLoc);
2147  cutOffParsing();
2148  return nullptr;
2149  }
2150 
2151  if (Tok.is(tok::identifier)) {
2152  categoryId = Tok.getIdentifierInfo();
2153  categoryLoc = ConsumeToken();
2154  } else {
2155  Diag(Tok, diag::err_expected)
2156  << tok::identifier; // missing category name.
2157  return nullptr;
2158  }
2159  if (Tok.isNot(tok::r_paren)) {
2160  Diag(Tok, diag::err_expected) << tok::r_paren;
2161  SkipUntil(tok::r_paren); // don't stop at ';'
2162  return nullptr;
2163  }
2164  rparenLoc = ConsumeParen();
2165  if (Tok.is(tok::less)) { // we have illegal '<' try to recover
2166  Diag(Tok, diag::err_unexpected_protocol_qualifier);
2167  SourceLocation protocolLAngleLoc, protocolRAngleLoc;
2168  SmallVector<Decl *, 4> protocols;
2169  SmallVector<SourceLocation, 4> protocolLocs;
2170  (void)ParseObjCProtocolReferences(protocols, protocolLocs,
2171  /*warnOnIncompleteProtocols=*/false,
2172  /*ForObjCContainer=*/false,
2173  protocolLAngleLoc, protocolRAngleLoc,
2174  /*consumeLastToken=*/true);
2175  }
2176  ObjCImpDecl = Actions.ActOnStartCategoryImplementation(
2177  AtLoc, nameId, nameLoc, categoryId, categoryLoc, Attrs);
2178 
2179  } else {
2180  // We have a class implementation
2181  SourceLocation superClassLoc;
2182  IdentifierInfo *superClassId = nullptr;
2183  if (TryConsumeToken(tok::colon)) {
2184  // We have a super class
2185  if (expectIdentifier())
2186  return nullptr; // missing super class name.
2187  superClassId = Tok.getIdentifierInfo();
2188  superClassLoc = ConsumeToken(); // Consume super class name
2189  }
2190  ObjCImpDecl = Actions.ActOnStartClassImplementation(
2191  AtLoc, nameId, nameLoc, superClassId, superClassLoc, Attrs);
2192 
2193  if (Tok.is(tok::l_brace)) // we have ivars
2194  ParseObjCClassInstanceVariables(ObjCImpDecl, tok::objc_private, AtLoc);
2195  else if (Tok.is(tok::less)) { // we have illegal '<' try to recover
2196  Diag(Tok, diag::err_unexpected_protocol_qualifier);
2197 
2198  SourceLocation protocolLAngleLoc, protocolRAngleLoc;
2199  SmallVector<Decl *, 4> protocols;
2200  SmallVector<SourceLocation, 4> protocolLocs;
2201  (void)ParseObjCProtocolReferences(protocols, protocolLocs,
2202  /*warnOnIncompleteProtocols=*/false,
2203  /*ForObjCContainer=*/false,
2204  protocolLAngleLoc, protocolRAngleLoc,
2205  /*consumeLastToken=*/true);
2206  }
2207  }
2208  assert(ObjCImpDecl);
2209 
2210  SmallVector<Decl *, 8> DeclsInGroup;
2211 
2212  {
2213  ObjCImplParsingDataRAII ObjCImplParsing(*this, ObjCImpDecl);
2214  while (!ObjCImplParsing.isFinished() && !isEofOrEom()) {
2215  ParsedAttributesWithRange attrs(AttrFactory);
2216  MaybeParseCXX11Attributes(attrs);
2217  if (DeclGroupPtrTy DGP = ParseExternalDeclaration(attrs)) {
2218  DeclGroupRef DG = DGP.get();
2219  DeclsInGroup.append(DG.begin(), DG.end());
2220  }
2221  }
2222  }
2223 
2224  return Actions.ActOnFinishObjCImplementation(ObjCImpDecl, DeclsInGroup);
2225 }
2226 
2228 Parser::ParseObjCAtEndDeclaration(SourceRange atEnd) {
2229  assert(Tok.isObjCAtKeyword(tok::objc_end) &&
2230  "ParseObjCAtEndDeclaration(): Expected @end");
2231  ConsumeToken(); // the "end" identifier
2232  if (CurParsedObjCImpl)
2233  CurParsedObjCImpl->finish(atEnd);
2234  else
2235  // missing @implementation
2236  Diag(atEnd.getBegin(), diag::err_expected_objc_container);
2237  return nullptr;
2238 }
2239 
2240 Parser::ObjCImplParsingDataRAII::~ObjCImplParsingDataRAII() {
2241  if (!Finished) {
2242  finish(P.Tok.getLocation());
2243  if (P.isEofOrEom()) {
2244  P.Diag(P.Tok, diag::err_objc_missing_end)
2245  << FixItHint::CreateInsertion(P.Tok.getLocation(), "\n@end\n");
2246  P.Diag(Dcl->getBeginLoc(), diag::note_objc_container_start)
2248  }
2249  }
2250  P.CurParsedObjCImpl = nullptr;
2251  assert(LateParsedObjCMethods.empty());
2252 }
2253 
2254 void Parser::ObjCImplParsingDataRAII::finish(SourceRange AtEnd) {
2255  assert(!Finished);
2256  P.Actions.DefaultSynthesizeProperties(P.getCurScope(), Dcl, AtEnd.getBegin());
2257  for (size_t i = 0; i < LateParsedObjCMethods.size(); ++i)
2258  P.ParseLexedObjCMethodDefs(*LateParsedObjCMethods[i],
2259  true/*Methods*/);
2260 
2261  P.Actions.ActOnAtEnd(P.getCurScope(), AtEnd);
2262 
2263  if (HasCFunction)
2264  for (size_t i = 0; i < LateParsedObjCMethods.size(); ++i)
2265  P.ParseLexedObjCMethodDefs(*LateParsedObjCMethods[i],
2266  false/*c-functions*/);
2267 
2268  /// Clear and free the cached objc methods.
2269  for (LateParsedObjCMethodContainer::iterator
2270  I = LateParsedObjCMethods.begin(),
2271  E = LateParsedObjCMethods.end(); I != E; ++I)
2272  delete *I;
2273  LateParsedObjCMethods.clear();
2274 
2275  Finished = true;
2276 }
2277 
2278 /// compatibility-alias-decl:
2279 /// @compatibility_alias alias-name class-name ';'
2280 ///
2281 Decl *Parser::ParseObjCAtAliasDeclaration(SourceLocation atLoc) {
2282  assert(Tok.isObjCAtKeyword(tok::objc_compatibility_alias) &&
2283  "ParseObjCAtAliasDeclaration(): Expected @compatibility_alias");
2284  ConsumeToken(); // consume compatibility_alias
2285  if (expectIdentifier())
2286  return nullptr;
2287  IdentifierInfo *aliasId = Tok.getIdentifierInfo();
2288  SourceLocation aliasLoc = ConsumeToken(); // consume alias-name
2289  if (expectIdentifier())
2290  return nullptr;
2291  IdentifierInfo *classId = Tok.getIdentifierInfo();
2292  SourceLocation classLoc = ConsumeToken(); // consume class-name;
2293  ExpectAndConsume(tok::semi, diag::err_expected_after, "@compatibility_alias");
2294  return Actions.ActOnCompatibilityAlias(atLoc, aliasId, aliasLoc,
2295  classId, classLoc);
2296 }
2297 
2298 /// property-synthesis:
2299 /// @synthesize property-ivar-list ';'
2300 ///
2301 /// property-ivar-list:
2302 /// property-ivar
2303 /// property-ivar-list ',' property-ivar
2304 ///
2305 /// property-ivar:
2306 /// identifier
2307 /// identifier '=' identifier
2308 ///
2309 Decl *Parser::ParseObjCPropertySynthesize(SourceLocation atLoc) {
2310  assert(Tok.isObjCAtKeyword(tok::objc_synthesize) &&
2311  "ParseObjCPropertySynthesize(): Expected '@synthesize'");
2312  ConsumeToken(); // consume synthesize
2313 
2314  while (true) {
2315  if (Tok.is(tok::code_completion)) {
2316  Actions.CodeCompleteObjCPropertyDefinition(getCurScope());
2317  cutOffParsing();
2318  return nullptr;
2319  }
2320 
2321  if (Tok.isNot(tok::identifier)) {
2322  Diag(Tok, diag::err_synthesized_property_name);
2323  SkipUntil(tok::semi);
2324  return nullptr;
2325  }
2326 
2327  IdentifierInfo *propertyIvar = nullptr;
2328  IdentifierInfo *propertyId = Tok.getIdentifierInfo();
2329  SourceLocation propertyLoc = ConsumeToken(); // consume property name
2330  SourceLocation propertyIvarLoc;
2331  if (TryConsumeToken(tok::equal)) {
2332  // property '=' ivar-name
2333  if (Tok.is(tok::code_completion)) {
2334  Actions.CodeCompleteObjCPropertySynthesizeIvar(getCurScope(), propertyId);
2335  cutOffParsing();
2336  return nullptr;
2337  }
2338 
2339  if (expectIdentifier())
2340  break;
2341  propertyIvar = Tok.getIdentifierInfo();
2342  propertyIvarLoc = ConsumeToken(); // consume ivar-name
2343  }
2344  Actions.ActOnPropertyImplDecl(
2345  getCurScope(), atLoc, propertyLoc, true,
2346  propertyId, propertyIvar, propertyIvarLoc,
2348  if (Tok.isNot(tok::comma))
2349  break;
2350  ConsumeToken(); // consume ','
2351  }
2352  ExpectAndConsume(tok::semi, diag::err_expected_after, "@synthesize");
2353  return nullptr;
2354 }
2355 
2356 /// property-dynamic:
2357 /// @dynamic property-list
2358 ///
2359 /// property-list:
2360 /// identifier
2361 /// property-list ',' identifier
2362 ///
2363 Decl *Parser::ParseObjCPropertyDynamic(SourceLocation atLoc) {
2364  assert(Tok.isObjCAtKeyword(tok::objc_dynamic) &&
2365  "ParseObjCPropertyDynamic(): Expected '@dynamic'");
2366  ConsumeToken(); // consume dynamic
2367 
2368  bool isClassProperty = false;
2369  if (Tok.is(tok::l_paren)) {
2370  ConsumeParen();
2371  const IdentifierInfo *II = Tok.getIdentifierInfo();
2372 
2373  if (!II) {
2374  Diag(Tok, diag::err_objc_expected_property_attr) << II;
2375  SkipUntil(tok::r_paren, StopAtSemi);
2376  } else {
2377  SourceLocation AttrName = ConsumeToken(); // consume attribute name
2378  if (II->isStr("class")) {
2379  isClassProperty = true;
2380  if (Tok.isNot(tok::r_paren)) {
2381  Diag(Tok, diag::err_expected) << tok::r_paren;
2382  SkipUntil(tok::r_paren, StopAtSemi);
2383  } else
2384  ConsumeParen();
2385  } else {
2386  Diag(AttrName, diag::err_objc_expected_property_attr) << II;
2387  SkipUntil(tok::r_paren, StopAtSemi);
2388  }
2389  }
2390  }
2391 
2392  while (true) {
2393  if (Tok.is(tok::code_completion)) {
2394  Actions.CodeCompleteObjCPropertyDefinition(getCurScope());
2395  cutOffParsing();
2396  return nullptr;
2397  }
2398 
2399  if (expectIdentifier()) {
2400  SkipUntil(tok::semi);
2401  return nullptr;
2402  }
2403 
2404  IdentifierInfo *propertyId = Tok.getIdentifierInfo();
2405  SourceLocation propertyLoc = ConsumeToken(); // consume property name
2406  Actions.ActOnPropertyImplDecl(
2407  getCurScope(), atLoc, propertyLoc, false,
2408  propertyId, nullptr, SourceLocation(),
2409  isClassProperty ? ObjCPropertyQueryKind::OBJC_PR_query_class :
2411 
2412  if (Tok.isNot(tok::comma))
2413  break;
2414  ConsumeToken(); // consume ','
2415  }
2416  ExpectAndConsume(tok::semi, diag::err_expected_after, "@dynamic");
2417  return nullptr;
2418 }
2419 
2420 /// objc-throw-statement:
2421 /// throw expression[opt];
2422 ///
2423 StmtResult Parser::ParseObjCThrowStmt(SourceLocation atLoc) {
2424  ExprResult Res;
2425  ConsumeToken(); // consume throw
2426  if (Tok.isNot(tok::semi)) {
2427  Res = ParseExpression();
2428  if (Res.isInvalid()) {
2429  SkipUntil(tok::semi);
2430  return StmtError();
2431  }
2432  }
2433  // consume ';'
2434  ExpectAndConsume(tok::semi, diag::err_expected_after, "@throw");
2435  return Actions.ActOnObjCAtThrowStmt(atLoc, Res.get(), getCurScope());
2436 }
2437 
2438 /// objc-synchronized-statement:
2439 /// @synchronized '(' expression ')' compound-statement
2440 ///
2441 StmtResult
2442 Parser::ParseObjCSynchronizedStmt(SourceLocation atLoc) {
2443  ConsumeToken(); // consume synchronized
2444  if (Tok.isNot(tok::l_paren)) {
2445  Diag(Tok, diag::err_expected_lparen_after) << "@synchronized";
2446  return StmtError();
2447  }
2448 
2449  // The operand is surrounded with parentheses.
2450  ConsumeParen(); // '('
2451  ExprResult operand(ParseExpression());
2452 
2453  if (Tok.is(tok::r_paren)) {
2454  ConsumeParen(); // ')'
2455  } else {
2456  if (!operand.isInvalid())
2457  Diag(Tok, diag::err_expected) << tok::r_paren;
2458 
2459  // Skip forward until we see a left brace, but don't consume it.
2460  SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
2461  }
2462 
2463  // Require a compound statement.
2464  if (Tok.isNot(tok::l_brace)) {
2465  if (!operand.isInvalid())
2466  Diag(Tok, diag::err_expected) << tok::l_brace;
2467  return StmtError();
2468  }
2469 
2470  // Check the @synchronized operand now.
2471  if (!operand.isInvalid())
2472  operand = Actions.ActOnObjCAtSynchronizedOperand(atLoc, operand.get());
2473 
2474  // Parse the compound statement within a new scope.
2475  ParseScope bodyScope(this, Scope::DeclScope | Scope::CompoundStmtScope);
2476  StmtResult body(ParseCompoundStatementBody());
2477  bodyScope.Exit();
2478 
2479  // If there was a semantic or parse error earlier with the
2480  // operand, fail now.
2481  if (operand.isInvalid())
2482  return StmtError();
2483 
2484  if (body.isInvalid())
2485  body = Actions.ActOnNullStmt(Tok.getLocation());
2486 
2487  return Actions.ActOnObjCAtSynchronizedStmt(atLoc, operand.get(), body.get());
2488 }
2489 
2490 /// objc-try-catch-statement:
2491 /// @try compound-statement objc-catch-list[opt]
2492 /// @try compound-statement objc-catch-list[opt] @finally compound-statement
2493 ///
2494 /// objc-catch-list:
2495 /// @catch ( parameter-declaration ) compound-statement
2496 /// objc-catch-list @catch ( catch-parameter-declaration ) compound-statement
2497 /// catch-parameter-declaration:
2498 /// parameter-declaration
2499 /// '...' [OBJC2]
2500 ///
2501 StmtResult Parser::ParseObjCTryStmt(SourceLocation atLoc) {
2502  bool catch_or_finally_seen = false;
2503 
2504  ConsumeToken(); // consume try
2505  if (Tok.isNot(tok::l_brace)) {
2506  Diag(Tok, diag::err_expected) << tok::l_brace;
2507  return StmtError();
2508  }
2509  StmtVector CatchStmts;
2510  StmtResult FinallyStmt;
2511  ParseScope TryScope(this, Scope::DeclScope | Scope::CompoundStmtScope);
2512  StmtResult TryBody(ParseCompoundStatementBody());
2513  TryScope.Exit();
2514  if (TryBody.isInvalid())
2515  TryBody = Actions.ActOnNullStmt(Tok.getLocation());
2516 
2517  while (Tok.is(tok::at)) {
2518  // At this point, we need to lookahead to determine if this @ is the start
2519  // of an @catch or @finally. We don't want to consume the @ token if this
2520  // is an @try or @encode or something else.
2521  Token AfterAt = GetLookAheadToken(1);
2522  if (!AfterAt.isObjCAtKeyword(tok::objc_catch) &&
2523  !AfterAt.isObjCAtKeyword(tok::objc_finally))
2524  break;
2525 
2526  SourceLocation AtCatchFinallyLoc = ConsumeToken();
2527  if (Tok.isObjCAtKeyword(tok::objc_catch)) {
2528  Decl *FirstPart = nullptr;
2529  ConsumeToken(); // consume catch
2530  if (Tok.is(tok::l_paren)) {
2531  ConsumeParen();
2532  ParseScope CatchScope(this, Scope::DeclScope |
2535  if (Tok.isNot(tok::ellipsis)) {
2536  DeclSpec DS(AttrFactory);
2537  ParseDeclarationSpecifiers(DS);
2539  ParseDeclarator(ParmDecl);
2540 
2541  // Inform the actions module about the declarator, so it
2542  // gets added to the current scope.
2543  FirstPart = Actions.ActOnObjCExceptionDecl(getCurScope(), ParmDecl);
2544  } else
2545  ConsumeToken(); // consume '...'
2546 
2547  SourceLocation RParenLoc;
2548 
2549  if (Tok.is(tok::r_paren))
2550  RParenLoc = ConsumeParen();
2551  else // Skip over garbage, until we get to ')'. Eat the ')'.
2552  SkipUntil(tok::r_paren, StopAtSemi);
2553 
2554  StmtResult CatchBody(true);
2555  if (Tok.is(tok::l_brace))
2556  CatchBody = ParseCompoundStatementBody();
2557  else
2558  Diag(Tok, diag::err_expected) << tok::l_brace;
2559  if (CatchBody.isInvalid())
2560  CatchBody = Actions.ActOnNullStmt(Tok.getLocation());
2561 
2562  StmtResult Catch = Actions.ActOnObjCAtCatchStmt(AtCatchFinallyLoc,
2563  RParenLoc,
2564  FirstPart,
2565  CatchBody.get());
2566  if (!Catch.isInvalid())
2567  CatchStmts.push_back(Catch.get());
2568 
2569  } else {
2570  Diag(AtCatchFinallyLoc, diag::err_expected_lparen_after)
2571  << "@catch clause";
2572  return StmtError();
2573  }
2574  catch_or_finally_seen = true;
2575  } else {
2576  assert(Tok.isObjCAtKeyword(tok::objc_finally) && "Lookahead confused?");
2577  ConsumeToken(); // consume finally
2578  ParseScope FinallyScope(this,
2580 
2581  bool ShouldCapture =
2582  getTargetInfo().getTriple().isWindowsMSVCEnvironment();
2583  if (ShouldCapture)
2584  Actions.ActOnCapturedRegionStart(Tok.getLocation(), getCurScope(),
2585  CR_ObjCAtFinally, 1);
2586 
2587  StmtResult FinallyBody(true);
2588  if (Tok.is(tok::l_brace))
2589  FinallyBody = ParseCompoundStatementBody();
2590  else
2591  Diag(Tok, diag::err_expected) << tok::l_brace;
2592 
2593  if (FinallyBody.isInvalid()) {
2594  FinallyBody = Actions.ActOnNullStmt(Tok.getLocation());
2595  if (ShouldCapture)
2596  Actions.ActOnCapturedRegionError();
2597  } else if (ShouldCapture) {
2598  FinallyBody = Actions.ActOnCapturedRegionEnd(FinallyBody.get());
2599  }
2600 
2601  FinallyStmt = Actions.ActOnObjCAtFinallyStmt(AtCatchFinallyLoc,
2602  FinallyBody.get());
2603  catch_or_finally_seen = true;
2604  break;
2605  }
2606  }
2607  if (!catch_or_finally_seen) {
2608  Diag(atLoc, diag::err_missing_catch_finally);
2609  return StmtError();
2610  }
2611 
2612  return Actions.ActOnObjCAtTryStmt(atLoc, TryBody.get(),
2613  CatchStmts,
2614  FinallyStmt.get());
2615 }
2616 
2617 /// objc-autoreleasepool-statement:
2618 /// @autoreleasepool compound-statement
2619 ///
2620 StmtResult
2621 Parser::ParseObjCAutoreleasePoolStmt(SourceLocation atLoc) {
2622  ConsumeToken(); // consume autoreleasepool
2623  if (Tok.isNot(tok::l_brace)) {
2624  Diag(Tok, diag::err_expected) << tok::l_brace;
2625  return StmtError();
2626  }
2627  // Enter a scope to hold everything within the compound stmt. Compound
2628  // statements can always hold declarations.
2629  ParseScope BodyScope(this, Scope::DeclScope | Scope::CompoundStmtScope);
2630 
2631  StmtResult AutoreleasePoolBody(ParseCompoundStatementBody());
2632 
2633  BodyScope.Exit();
2634  if (AutoreleasePoolBody.isInvalid())
2635  AutoreleasePoolBody = Actions.ActOnNullStmt(Tok.getLocation());
2636  return Actions.ActOnObjCAutoreleasePoolStmt(atLoc,
2637  AutoreleasePoolBody.get());
2638 }
2639 
2640 /// StashAwayMethodOrFunctionBodyTokens - Consume the tokens and store them
2641 /// for later parsing.
2642 void Parser::StashAwayMethodOrFunctionBodyTokens(Decl *MDecl) {
2643  if (SkipFunctionBodies && (!MDecl || Actions.canSkipFunctionBody(MDecl)) &&
2644  trySkippingFunctionBody()) {
2645  Actions.ActOnSkippedFunctionBody(MDecl);
2646  return;
2647  }
2648 
2649  LexedMethod* LM = new LexedMethod(this, MDecl);
2650  CurParsedObjCImpl->LateParsedObjCMethods.push_back(LM);
2651  CachedTokens &Toks = LM->Toks;
2652  // Begin by storing the '{' or 'try' or ':' token.
2653  Toks.push_back(Tok);
2654  if (Tok.is(tok::kw_try)) {
2655  ConsumeToken();
2656  if (Tok.is(tok::colon)) {
2657  Toks.push_back(Tok);
2658  ConsumeToken();
2659  while (Tok.isNot(tok::l_brace)) {
2660  ConsumeAndStoreUntil(tok::l_paren, Toks, /*StopAtSemi=*/false);
2661  ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
2662  }
2663  }
2664  Toks.push_back(Tok); // also store '{'
2665  }
2666  else if (Tok.is(tok::colon)) {
2667  ConsumeToken();
2668  // FIXME: This is wrong, due to C++11 braced initialization.
2669  while (Tok.isNot(tok::l_brace)) {
2670  ConsumeAndStoreUntil(tok::l_paren, Toks, /*StopAtSemi=*/false);
2671  ConsumeAndStoreUntil(tok::r_paren, Toks, /*StopAtSemi=*/false);
2672  }
2673  Toks.push_back(Tok); // also store '{'
2674  }
2675  ConsumeBrace();
2676  // Consume everything up to (and including) the matching right brace.
2677  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
2678  while (Tok.is(tok::kw_catch)) {
2679  ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false);
2680  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
2681  }
2682 }
2683 
2684 /// objc-method-def: objc-method-proto ';'[opt] '{' body '}'
2685 ///
2686 Decl *Parser::ParseObjCMethodDefinition() {
2687  Decl *MDecl = ParseObjCMethodPrototype();
2688 
2689  PrettyDeclStackTraceEntry CrashInfo(Actions.Context, MDecl, Tok.getLocation(),
2690  "parsing Objective-C method");
2691 
2692  // parse optional ';'
2693  if (Tok.is(tok::semi)) {
2694  if (CurParsedObjCImpl) {
2695  Diag(Tok, diag::warn_semicolon_before_method_body)
2696  << FixItHint::CreateRemoval(Tok.getLocation());
2697  }
2698  ConsumeToken();
2699  }
2700 
2701  // We should have an opening brace now.
2702  if (Tok.isNot(tok::l_brace)) {
2703  Diag(Tok, diag::err_expected_method_body);
2704 
2705  // Skip over garbage, until we get to '{'. Don't eat the '{'.
2706  SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
2707 
2708  // If we didn't find the '{', bail out.
2709  if (Tok.isNot(tok::l_brace))
2710  return nullptr;
2711  }
2712 
2713  if (!MDecl) {
2714  ConsumeBrace();
2715  SkipUntil(tok::r_brace);
2716  return nullptr;
2717  }
2718 
2719  // Allow the rest of sema to find private method decl implementations.
2720  Actions.AddAnyMethodToGlobalPool(MDecl);
2721  assert (CurParsedObjCImpl
2722  && "ParseObjCMethodDefinition - Method out of @implementation");
2723  // Consume the tokens and store them for later parsing.
2724  StashAwayMethodOrFunctionBodyTokens(MDecl);
2725  return MDecl;
2726 }
2727 
2728 StmtResult Parser::ParseObjCAtStatement(SourceLocation AtLoc,
2729  ParsedStmtContext StmtCtx) {
2730  if (Tok.is(tok::code_completion)) {
2731  Actions.CodeCompleteObjCAtStatement(getCurScope());
2732  cutOffParsing();
2733  return StmtError();
2734  }
2735 
2736  if (Tok.isObjCAtKeyword(tok::objc_try))
2737  return ParseObjCTryStmt(AtLoc);
2738 
2739  if (Tok.isObjCAtKeyword(tok::objc_throw))
2740  return ParseObjCThrowStmt(AtLoc);
2741 
2742  if (Tok.isObjCAtKeyword(tok::objc_synchronized))
2743  return ParseObjCSynchronizedStmt(AtLoc);
2744 
2745  if (Tok.isObjCAtKeyword(tok::objc_autoreleasepool))
2746  return ParseObjCAutoreleasePoolStmt(AtLoc);
2747 
2748  if (Tok.isObjCAtKeyword(tok::objc_import) &&
2749  getLangOpts().DebuggerSupport) {
2750  SkipUntil(tok::semi);
2751  return Actions.ActOnNullStmt(Tok.getLocation());
2752  }
2753 
2754  ExprStatementTokLoc = AtLoc;
2755  ExprResult Res(ParseExpressionWithLeadingAt(AtLoc));
2756  if (Res.isInvalid()) {
2757  // If the expression is invalid, skip ahead to the next semicolon. Not
2758  // doing this opens us up to the possibility of infinite loops if
2759  // ParseExpression does not consume any tokens.
2760  SkipUntil(tok::semi);
2761  return StmtError();
2762  }
2763 
2764  // Otherwise, eat the semicolon.
2765  ExpectAndConsumeSemi(diag::err_expected_semi_after_expr);
2766  return handleExprStmt(Res, StmtCtx);
2767 }
2768 
2769 ExprResult Parser::ParseObjCAtExpression(SourceLocation AtLoc) {
2770  switch (Tok.getKind()) {
2771  case tok::code_completion:
2772  Actions.CodeCompleteObjCAtExpression(getCurScope());
2773  cutOffParsing();
2774  return ExprError();
2775 
2776  case tok::minus:
2777  case tok::plus: {
2778  tok::TokenKind Kind = Tok.getKind();
2779  SourceLocation OpLoc = ConsumeToken();
2780 
2781  if (!Tok.is(tok::numeric_constant)) {
2782  const char *Symbol = nullptr;
2783  switch (Kind) {
2784  case tok::minus: Symbol = "-"; break;
2785  case tok::plus: Symbol = "+"; break;
2786  default: llvm_unreachable("missing unary operator case");
2787  }
2788  Diag(Tok, diag::err_nsnumber_nonliteral_unary)
2789  << Symbol;
2790  return ExprError();
2791  }
2792 
2793  ExprResult Lit(Actions.ActOnNumericConstant(Tok));
2794  if (Lit.isInvalid()) {
2795  return Lit;
2796  }
2797  ConsumeToken(); // Consume the literal token.
2798 
2799  Lit = Actions.ActOnUnaryOp(getCurScope(), OpLoc, Kind, Lit.get());
2800  if (Lit.isInvalid())
2801  return Lit;
2802 
2803  return ParsePostfixExpressionSuffix(
2804  Actions.BuildObjCNumericLiteral(AtLoc, Lit.get()));
2805  }
2806 
2807  case tok::string_literal: // primary-expression: string-literal
2808  case tok::wide_string_literal:
2809  return ParsePostfixExpressionSuffix(ParseObjCStringLiteral(AtLoc));
2810 
2811  case tok::char_constant:
2812  return ParsePostfixExpressionSuffix(ParseObjCCharacterLiteral(AtLoc));
2813 
2814  case tok::numeric_constant:
2815  return ParsePostfixExpressionSuffix(ParseObjCNumericLiteral(AtLoc));
2816 
2817  case tok::kw_true: // Objective-C++, etc.
2818  case tok::kw___objc_yes: // c/c++/objc/objc++ __objc_yes
2819  return ParsePostfixExpressionSuffix(ParseObjCBooleanLiteral(AtLoc, true));
2820  case tok::kw_false: // Objective-C++, etc.
2821  case tok::kw___objc_no: // c/c++/objc/objc++ __objc_no
2822  return ParsePostfixExpressionSuffix(ParseObjCBooleanLiteral(AtLoc, false));
2823 
2824  case tok::l_square:
2825  // Objective-C array literal
2826  return ParsePostfixExpressionSuffix(ParseObjCArrayLiteral(AtLoc));
2827 
2828  case tok::l_brace:
2829  // Objective-C dictionary literal
2830  return ParsePostfixExpressionSuffix(ParseObjCDictionaryLiteral(AtLoc));
2831 
2832  case tok::l_paren:
2833  // Objective-C boxed expression
2834  return ParsePostfixExpressionSuffix(ParseObjCBoxedExpr(AtLoc));
2835 
2836  default:
2837  if (Tok.getIdentifierInfo() == nullptr)
2838  return ExprError(Diag(AtLoc, diag::err_unexpected_at));
2839 
2840  switch (Tok.getIdentifierInfo()->getObjCKeywordID()) {
2841  case tok::objc_encode:
2842  return ParsePostfixExpressionSuffix(ParseObjCEncodeExpression(AtLoc));
2843  case tok::objc_protocol:
2844  return ParsePostfixExpressionSuffix(ParseObjCProtocolExpression(AtLoc));
2845  case tok::objc_selector:
2846  return ParsePostfixExpressionSuffix(ParseObjCSelectorExpression(AtLoc));
2847  case tok::objc_available:
2848  return ParseAvailabilityCheckExpr(AtLoc);
2849  default: {
2850  const char *str = nullptr;
2851  // Only provide the @try/@finally/@autoreleasepool fixit when we're sure
2852  // that this is a proper statement where such directives could actually
2853  // occur.
2854  if (GetLookAheadToken(1).is(tok::l_brace) &&
2855  ExprStatementTokLoc == AtLoc) {
2856  char ch = Tok.getIdentifierInfo()->getNameStart()[0];
2857  str =
2858  ch == 't' ? "try"
2859  : (ch == 'f' ? "finally"
2860  : (ch == 'a' ? "autoreleasepool" : nullptr));
2861  }
2862  if (str) {
2863  SourceLocation kwLoc = Tok.getLocation();
2864  return ExprError(Diag(AtLoc, diag::err_unexpected_at) <<
2865  FixItHint::CreateReplacement(kwLoc, str));
2866  }
2867  else
2868  return ExprError(Diag(AtLoc, diag::err_unexpected_at));
2869  }
2870  }
2871  }
2872 }
2873 
2874 /// Parse the receiver of an Objective-C++ message send.
2875 ///
2876 /// This routine parses the receiver of a message send in
2877 /// Objective-C++ either as a type or as an expression. Note that this
2878 /// routine must not be called to parse a send to 'super', since it
2879 /// has no way to return such a result.
2880 ///
2881 /// \param IsExpr Whether the receiver was parsed as an expression.
2882 ///
2883 /// \param TypeOrExpr If the receiver was parsed as an expression (\c
2884 /// IsExpr is true), the parsed expression. If the receiver was parsed
2885 /// as a type (\c IsExpr is false), the parsed type.
2886 ///
2887 /// \returns True if an error occurred during parsing or semantic
2888 /// analysis, in which case the arguments do not have valid
2889 /// values. Otherwise, returns false for a successful parse.
2890 ///
2891 /// objc-receiver: [C++]
2892 /// 'super' [not parsed here]
2893 /// expression
2894 /// simple-type-specifier
2895 /// typename-specifier
2896 bool Parser::ParseObjCXXMessageReceiver(bool &IsExpr, void *&TypeOrExpr) {
2897  InMessageExpressionRAIIObject InMessage(*this, true);
2898 
2899  if (Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw_typename,
2900  tok::annot_cxxscope))
2902 
2903  if (!Actions.isSimpleTypeSpecifier(Tok.getKind())) {
2904  // objc-receiver:
2905  // expression
2906  // Make sure any typos in the receiver are corrected or diagnosed, so that
2907  // proper recovery can happen. FIXME: Perhaps filter the corrected expr to
2908  // only the things that are valid ObjC receivers?
2909  ExprResult Receiver = Actions.CorrectDelayedTyposInExpr(ParseExpression());
2910  if (Receiver.isInvalid())
2911  return true;
2912 
2913  IsExpr = true;
2914  TypeOrExpr = Receiver.get();
2915  return false;
2916  }
2917 
2918  // objc-receiver:
2919  // typename-specifier
2920  // simple-type-specifier
2921  // expression (that starts with one of the above)
2922  DeclSpec DS(AttrFactory);
2923  ParseCXXSimpleTypeSpecifier(DS);
2924 
2925  if (Tok.is(tok::l_paren)) {
2926  // If we see an opening parentheses at this point, we are
2927  // actually parsing an expression that starts with a
2928  // function-style cast, e.g.,
2929  //
2930  // postfix-expression:
2931  // simple-type-specifier ( expression-list [opt] )
2932  // typename-specifier ( expression-list [opt] )
2933  //
2934  // Parse the remainder of this case, then the (optional)
2935  // postfix-expression suffix, followed by the (optional)
2936  // right-hand side of the binary expression. We have an
2937  // instance method.
2938  ExprResult Receiver = ParseCXXTypeConstructExpression(DS);
2939  if (!Receiver.isInvalid())
2940  Receiver = ParsePostfixExpressionSuffix(Receiver.get());
2941  if (!Receiver.isInvalid())
2942  Receiver = ParseRHSOfBinaryExpression(Receiver.get(), prec::Comma);
2943  if (Receiver.isInvalid())
2944  return true;
2945 
2946  IsExpr = true;
2947  TypeOrExpr = Receiver.get();
2948  return false;
2949  }
2950 
2951  // We have a class message. Turn the simple-type-specifier or
2952  // typename-specifier we parsed into a type and parse the
2953  // remainder of the class message.
2954  Declarator DeclaratorInfo(DS, DeclaratorContext::TypeNameContext);
2955  TypeResult Type = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
2956  if (Type.isInvalid())
2957  return true;
2958 
2959  IsExpr = false;
2960  TypeOrExpr = Type.get().getAsOpaquePtr();
2961  return false;
2962 }
2963 
2964 /// Determine whether the parser is currently referring to a an
2965 /// Objective-C message send, using a simplified heuristic to avoid overhead.
2966 ///
2967 /// This routine will only return true for a subset of valid message-send
2968 /// expressions.
2969 bool Parser::isSimpleObjCMessageExpression() {
2970  assert(Tok.is(tok::l_square) && getLangOpts().ObjC &&
2971  "Incorrect start for isSimpleObjCMessageExpression");
2972  return GetLookAheadToken(1).is(tok::identifier) &&
2973  GetLookAheadToken(2).is(tok::identifier);
2974 }
2975 
2976 bool Parser::isStartOfObjCClassMessageMissingOpenBracket() {
2977  if (!getLangOpts().ObjC || !NextToken().is(tok::identifier) ||
2978  InMessageExpression)
2979  return false;
2980 
2981  ParsedType Type;
2982 
2983  if (Tok.is(tok::annot_typename))
2984  Type = getTypeAnnotation(Tok);
2985  else if (Tok.is(tok::identifier))
2986  Type = Actions.getTypeName(*Tok.getIdentifierInfo(), Tok.getLocation(),
2987  getCurScope());
2988  else
2989  return false;
2990 
2991  if (!Type.get().isNull() && Type.get()->isObjCObjectOrInterfaceType()) {
2992  const Token &AfterNext = GetLookAheadToken(2);
2993  if (AfterNext.isOneOf(tok::colon, tok::r_square)) {
2994  if (Tok.is(tok::identifier))
2996 
2997  return Tok.is(tok::annot_typename);
2998  }
2999  }
3000 
3001  return false;
3002 }
3003 
3004 /// objc-message-expr:
3005 /// '[' objc-receiver objc-message-args ']'
3006 ///
3007 /// objc-receiver: [C]
3008 /// 'super'
3009 /// expression
3010 /// class-name
3011 /// type-name
3012 ///
3013 ExprResult Parser::ParseObjCMessageExpression() {
3014  assert(Tok.is(tok::l_square) && "'[' expected");
3015  SourceLocation LBracLoc = ConsumeBracket(); // consume '['
3016 
3017  if (Tok.is(tok::code_completion)) {
3018  Actions.CodeCompleteObjCMessageReceiver(getCurScope());
3019  cutOffParsing();
3020  return ExprError();
3021  }
3022 
3023  InMessageExpressionRAIIObject InMessage(*this, true);
3024 
3025  if (getLangOpts().CPlusPlus) {
3026  // We completely separate the C and C++ cases because C++ requires
3027  // more complicated (read: slower) parsing.
3028 
3029  // Handle send to super.
3030  // FIXME: This doesn't benefit from the same typo-correction we
3031  // get in Objective-C.
3032  if (Tok.is(tok::identifier) && Tok.getIdentifierInfo() == Ident_super &&
3033  NextToken().isNot(tok::period) && getCurScope()->isInObjcMethodScope())
3034  return ParseObjCMessageExpressionBody(LBracLoc, ConsumeToken(), nullptr,
3035  nullptr);
3036 
3037  // Parse the receiver, which is either a type or an expression.
3038  bool IsExpr;
3039  void *TypeOrExpr = nullptr;
3040  if (ParseObjCXXMessageReceiver(IsExpr, TypeOrExpr)) {
3041  SkipUntil(tok::r_square, StopAtSemi);
3042  return ExprError();
3043  }
3044 
3045  if (IsExpr)
3046  return ParseObjCMessageExpressionBody(LBracLoc, SourceLocation(), nullptr,
3047  static_cast<Expr *>(TypeOrExpr));
3048 
3049  return ParseObjCMessageExpressionBody(LBracLoc, SourceLocation(),
3050  ParsedType::getFromOpaquePtr(TypeOrExpr),
3051  nullptr);
3052  }
3053 
3054  if (Tok.is(tok::identifier)) {
3055  IdentifierInfo *Name = Tok.getIdentifierInfo();
3056  SourceLocation NameLoc = Tok.getLocation();
3057  ParsedType ReceiverType;
3058  switch (Actions.getObjCMessageKind(getCurScope(), Name, NameLoc,
3059  Name == Ident_super,
3060  NextToken().is(tok::period),
3061  ReceiverType)) {
3063  return ParseObjCMessageExpressionBody(LBracLoc, ConsumeToken(), nullptr,
3064  nullptr);
3065 
3067  if (!ReceiverType) {
3068  SkipUntil(tok::r_square, StopAtSemi);
3069  return ExprError();
3070  }
3071 
3072  ConsumeToken(); // the type name
3073 
3074  // Parse type arguments and protocol qualifiers.
3075  if (Tok.is(tok::less)) {
3076  SourceLocation NewEndLoc;
3077  TypeResult NewReceiverType
3078  = parseObjCTypeArgsAndProtocolQualifiers(NameLoc, ReceiverType,
3079  /*consumeLastToken=*/true,
3080  NewEndLoc);
3081  if (!NewReceiverType.isUsable()) {
3082  SkipUntil(tok::r_square, StopAtSemi);
3083  return ExprError();
3084  }
3085 
3086  ReceiverType = NewReceiverType.get();
3087  }
3088 
3089  return ParseObjCMessageExpressionBody(LBracLoc, SourceLocation(),
3090  ReceiverType, nullptr);
3091 
3093  // Fall through to parse an expression.
3094  break;
3095  }
3096  }
3097 
3098  // Otherwise, an arbitrary expression can be the receiver of a send.
3099  ExprResult Res = Actions.CorrectDelayedTyposInExpr(ParseExpression());
3100  if (Res.isInvalid()) {
3101  SkipUntil(tok::r_square, StopAtSemi);
3102  return Res;
3103  }
3104 
3105  return ParseObjCMessageExpressionBody(LBracLoc, SourceLocation(), nullptr,
3106  Res.get());
3107 }
3108 
3109 /// Parse the remainder of an Objective-C message following the
3110 /// '[' objc-receiver.
3111 ///
3112 /// This routine handles sends to super, class messages (sent to a
3113 /// class name), and instance messages (sent to an object), and the
3114 /// target is represented by \p SuperLoc, \p ReceiverType, or \p
3115 /// ReceiverExpr, respectively. Only one of these parameters may have
3116 /// a valid value.
3117 ///
3118 /// \param LBracLoc The location of the opening '['.
3119 ///
3120 /// \param SuperLoc If this is a send to 'super', the location of the
3121 /// 'super' keyword that indicates a send to the superclass.
3122 ///
3123 /// \param ReceiverType If this is a class message, the type of the
3124 /// class we are sending a message to.
3125 ///
3126 /// \param ReceiverExpr If this is an instance message, the expression
3127 /// used to compute the receiver object.
3128 ///
3129 /// objc-message-args:
3130 /// objc-selector
3131 /// objc-keywordarg-list
3132 ///
3133 /// objc-keywordarg-list:
3134 /// objc-keywordarg
3135 /// objc-keywordarg-list objc-keywordarg
3136 ///
3137 /// objc-keywordarg:
3138 /// selector-name[opt] ':' objc-keywordexpr
3139 ///
3140 /// objc-keywordexpr:
3141 /// nonempty-expr-list
3142 ///
3143 /// nonempty-expr-list:
3144 /// assignment-expression
3145 /// nonempty-expr-list , assignment-expression
3146 ///
3147 ExprResult
3148 Parser::ParseObjCMessageExpressionBody(SourceLocation LBracLoc,
3149  SourceLocation SuperLoc,
3150  ParsedType ReceiverType,
3151  Expr *ReceiverExpr) {
3152  InMessageExpressionRAIIObject InMessage(*this, true);
3153 
3154  if (Tok.is(tok::code_completion)) {
3155  if (SuperLoc.isValid())
3156  Actions.CodeCompleteObjCSuperMessage(getCurScope(), SuperLoc, None,
3157  false);
3158  else if (ReceiverType)
3159  Actions.CodeCompleteObjCClassMessage(getCurScope(), ReceiverType, None,
3160  false);
3161  else
3162  Actions.CodeCompleteObjCInstanceMessage(getCurScope(), ReceiverExpr,
3163  None, false);
3164  cutOffParsing();
3165  return ExprError();
3166  }
3167 
3168  // Parse objc-selector
3169  SourceLocation Loc;
3170  IdentifierInfo *selIdent = ParseObjCSelectorPiece(Loc);
3171 
3174  ExprVector KeyExprs;
3175 
3176  if (Tok.is(tok::colon)) {
3177  while (1) {
3178  // Each iteration parses a single keyword argument.
3179  KeyIdents.push_back(selIdent);
3180  KeyLocs.push_back(Loc);
3181 
3182  if (ExpectAndConsume(tok::colon)) {
3183  // We must manually skip to a ']', otherwise the expression skipper will
3184  // stop at the ']' when it skips to the ';'. We want it to skip beyond
3185  // the enclosing expression.
3186  SkipUntil(tok::r_square, StopAtSemi);
3187  return ExprError();
3188  }
3189 
3190  /// Parse the expression after ':'
3191 
3192  if (Tok.is(tok::code_completion)) {
3193  if (SuperLoc.isValid())
3194  Actions.CodeCompleteObjCSuperMessage(getCurScope(), SuperLoc,
3195  KeyIdents,
3196  /*AtArgumentExpression=*/true);
3197  else if (ReceiverType)
3198  Actions.CodeCompleteObjCClassMessage(getCurScope(), ReceiverType,
3199  KeyIdents,
3200  /*AtArgumentExpression=*/true);
3201  else
3202  Actions.CodeCompleteObjCInstanceMessage(getCurScope(), ReceiverExpr,
3203  KeyIdents,
3204  /*AtArgumentExpression=*/true);
3205 
3206  cutOffParsing();
3207  return ExprError();
3208  }
3209 
3210  ExprResult Expr;
3211  if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
3212  Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
3213  Expr = ParseBraceInitializer();
3214  } else
3215  Expr = ParseAssignmentExpression();
3216 
3217  ExprResult Res(Expr);
3218  if (Res.isInvalid()) {
3219  // We must manually skip to a ']', otherwise the expression skipper will
3220  // stop at the ']' when it skips to the ';'. We want it to skip beyond
3221  // the enclosing expression.
3222  SkipUntil(tok::r_square, StopAtSemi);
3223  return Res;
3224  }
3225 
3226  // We have a valid expression.
3227  KeyExprs.push_back(Res.get());
3228 
3229  // Code completion after each argument.
3230  if (Tok.is(tok::code_completion)) {
3231  if (SuperLoc.isValid())
3232  Actions.CodeCompleteObjCSuperMessage(getCurScope(), SuperLoc,
3233  KeyIdents,
3234  /*AtArgumentExpression=*/false);
3235  else if (ReceiverType)
3236  Actions.CodeCompleteObjCClassMessage(getCurScope(), ReceiverType,
3237  KeyIdents,
3238  /*AtArgumentExpression=*/false);
3239  else
3240  Actions.CodeCompleteObjCInstanceMessage(getCurScope(), ReceiverExpr,
3241  KeyIdents,
3242  /*AtArgumentExpression=*/false);
3243  cutOffParsing();
3244  return ExprError();
3245  }
3246 
3247  // Check for another keyword selector.
3248  selIdent = ParseObjCSelectorPiece(Loc);
3249  if (!selIdent && Tok.isNot(tok::colon))
3250  break;
3251  // We have a selector or a colon, continue parsing.
3252  }
3253  // Parse the, optional, argument list, comma separated.
3254  while (Tok.is(tok::comma)) {
3255  SourceLocation commaLoc = ConsumeToken(); // Eat the ','.
3256  /// Parse the expression after ','
3258  if (Tok.is(tok::colon))
3259  Res = Actions.CorrectDelayedTyposInExpr(Res);
3260  if (Res.isInvalid()) {
3261  if (Tok.is(tok::colon)) {
3262  Diag(commaLoc, diag::note_extra_comma_message_arg) <<
3263  FixItHint::CreateRemoval(commaLoc);
3264  }
3265  // We must manually skip to a ']', otherwise the expression skipper will
3266  // stop at the ']' when it skips to the ';'. We want it to skip beyond
3267  // the enclosing expression.
3268  SkipUntil(tok::r_square, StopAtSemi);
3269  return Res;
3270  }
3271 
3272  // We have a valid expression.
3273  KeyExprs.push_back(Res.get());
3274  }
3275  } else if (!selIdent) {
3276  Diag(Tok, diag::err_expected) << tok::identifier; // missing selector name.
3277 
3278  // We must manually skip to a ']', otherwise the expression skipper will
3279  // stop at the ']' when it skips to the ';'. We want it to skip beyond
3280  // the enclosing expression.
3281  SkipUntil(tok::r_square, StopAtSemi);
3282  return ExprError();
3283  }
3284 
3285  if (Tok.isNot(tok::r_square)) {
3286  Diag(Tok, diag::err_expected)
3287  << (Tok.is(tok::identifier) ? tok::colon : tok::r_square);
3288  // We must manually skip to a ']', otherwise the expression skipper will
3289  // stop at the ']' when it skips to the ';'. We want it to skip beyond
3290  // the enclosing expression.
3291  SkipUntil(tok::r_square, StopAtSemi);
3292  return ExprError();
3293  }
3294 
3295  SourceLocation RBracLoc = ConsumeBracket(); // consume ']'
3296 
3297  unsigned nKeys = KeyIdents.size();
3298  if (nKeys == 0) {
3299  KeyIdents.push_back(selIdent);
3300  KeyLocs.push_back(Loc);
3301  }
3302  Selector Sel = PP.getSelectorTable().getSelector(nKeys, &KeyIdents[0]);
3303 
3304  if (SuperLoc.isValid())
3305  return Actions.ActOnSuperMessage(getCurScope(), SuperLoc, Sel,
3306  LBracLoc, KeyLocs, RBracLoc, KeyExprs);
3307  else if (ReceiverType)
3308  return Actions.ActOnClassMessage(getCurScope(), ReceiverType, Sel,
3309  LBracLoc, KeyLocs, RBracLoc, KeyExprs);
3310  return Actions.ActOnInstanceMessage(getCurScope(), ReceiverExpr, Sel,
3311  LBracLoc, KeyLocs, RBracLoc, KeyExprs);
3312 }
3313 
3314 ExprResult Parser::ParseObjCStringLiteral(SourceLocation AtLoc) {
3315  ExprResult Res(ParseStringLiteralExpression());
3316  if (Res.isInvalid()) return Res;
3317 
3318  // @"foo" @"bar" is a valid concatenated string. Eat any subsequent string
3319  // expressions. At this point, we know that the only valid thing that starts
3320  // with '@' is an @"".
3322  ExprVector AtStrings;
3323  AtLocs.push_back(AtLoc);
3324  AtStrings.push_back(Res.get());
3325 
3326  while (Tok.is(tok::at)) {
3327  AtLocs.push_back(ConsumeToken()); // eat the @.
3328 
3329  // Invalid unless there is a string literal.
3330  if (!isTokenStringLiteral())
3331  return ExprError(Diag(Tok, diag::err_objc_concat_string));
3332 
3333  ExprResult Lit(ParseStringLiteralExpression());
3334  if (Lit.isInvalid())
3335  return Lit;
3336 
3337  AtStrings.push_back(Lit.get());
3338  }
3339 
3340  return Actions.ParseObjCStringLiteral(AtLocs.data(), AtStrings);
3341 }
3342 
3343 /// ParseObjCBooleanLiteral -
3344 /// objc-scalar-literal : '@' boolean-keyword
3345 /// ;
3346 /// boolean-keyword: 'true' | 'false' | '__objc_yes' | '__objc_no'
3347 /// ;
3348 ExprResult Parser::ParseObjCBooleanLiteral(SourceLocation AtLoc,
3349  bool ArgValue) {
3350  SourceLocation EndLoc = ConsumeToken(); // consume the keyword.
3351  return Actions.ActOnObjCBoolLiteral(AtLoc, EndLoc, ArgValue);
3352 }
3353 
3354 /// ParseObjCCharacterLiteral -
3355 /// objc-scalar-literal : '@' character-literal
3356 /// ;
3357 ExprResult Parser::ParseObjCCharacterLiteral(SourceLocation AtLoc) {
3358  ExprResult Lit(Actions.ActOnCharacterConstant(Tok));
3359  if (Lit.isInvalid()) {
3360  return Lit;
3361  }
3362  ConsumeToken(); // Consume the literal token.
3363  return Actions.BuildObjCNumericLiteral(AtLoc, Lit.get());
3364 }
3365 
3366 /// ParseObjCNumericLiteral -
3367 /// objc-scalar-literal : '@' scalar-literal
3368 /// ;
3369 /// scalar-literal : | numeric-constant /* any numeric constant. */
3370 /// ;
3371 ExprResult Parser::ParseObjCNumericLiteral(SourceLocation AtLoc) {
3372  ExprResult Lit(Actions.ActOnNumericConstant(Tok));
3373  if (Lit.isInvalid()) {
3374  return Lit;
3375  }
3376  ConsumeToken(); // Consume the literal token.
3377  return Actions.BuildObjCNumericLiteral(AtLoc, Lit.get());
3378 }
3379 
3380 /// ParseObjCBoxedExpr -
3381 /// objc-box-expression:
3382 /// @( assignment-expression )
3383 ExprResult
3384 Parser::ParseObjCBoxedExpr(SourceLocation AtLoc) {
3385  if (Tok.isNot(tok::l_paren))
3386  return ExprError(Diag(Tok, diag::err_expected_lparen_after) << "@");
3387 
3388  BalancedDelimiterTracker T(*this, tok::l_paren);
3389  T.consumeOpen();
3391  if (T.consumeClose())
3392  return ExprError();
3393 
3394  if (ValueExpr.isInvalid())
3395  return ExprError();
3396 
3397  // Wrap the sub-expression in a parenthesized expression, to distinguish
3398  // a boxed expression from a literal.
3399  SourceLocation LPLoc = T.getOpenLocation(), RPLoc = T.getCloseLocation();
3400  ValueExpr = Actions.ActOnParenExpr(LPLoc, RPLoc, ValueExpr.get());
3401  return Actions.BuildObjCBoxedExpr(SourceRange(AtLoc, RPLoc),
3402  ValueExpr.get());
3403 }
3404 
3405 ExprResult Parser::ParseObjCArrayLiteral(SourceLocation AtLoc) {
3406  ExprVector ElementExprs; // array elements.
3407  ConsumeBracket(); // consume the l_square.
3408 
3409  bool HasInvalidEltExpr = false;
3410  while (Tok.isNot(tok::r_square)) {
3411  // Parse list of array element expressions (all must be id types).
3413  if (Res.isInvalid()) {
3414  // We must manually skip to a ']', otherwise the expression skipper will
3415  // stop at the ']' when it skips to the ';'. We want it to skip beyond
3416  // the enclosing expression.
3417  SkipUntil(tok::r_square, StopAtSemi);
3418  return Res;
3419  }
3420 
3421  Res = Actions.CorrectDelayedTyposInExpr(Res.get());
3422  if (Res.isInvalid())
3423  HasInvalidEltExpr = true;
3424 
3425  // Parse the ellipsis that indicates a pack expansion.
3426  if (Tok.is(tok::ellipsis))
3427  Res = Actions.ActOnPackExpansion(Res.get(), ConsumeToken());
3428  if (Res.isInvalid())
3429  HasInvalidEltExpr = true;
3430 
3431  ElementExprs.push_back(Res.get());
3432 
3433  if (Tok.is(tok::comma))
3434  ConsumeToken(); // Eat the ','.
3435  else if (Tok.isNot(tok::r_square))
3436  return ExprError(Diag(Tok, diag::err_expected_either) << tok::r_square
3437  << tok::comma);
3438  }
3439  SourceLocation EndLoc = ConsumeBracket(); // location of ']'
3440 
3441  if (HasInvalidEltExpr)
3442  return ExprError();
3443 
3444  MultiExprArg Args(ElementExprs);
3445  return Actions.BuildObjCArrayLiteral(SourceRange(AtLoc, EndLoc), Args);
3446 }
3447 
3448 ExprResult Parser::ParseObjCDictionaryLiteral(SourceLocation AtLoc) {
3449  SmallVector<ObjCDictionaryElement, 4> Elements; // dictionary elements.
3450  ConsumeBrace(); // consume the l_square.
3451  bool HasInvalidEltExpr = false;
3452  while (Tok.isNot(tok::r_brace)) {
3453  // Parse the comma separated key : value expressions.
3454  ExprResult KeyExpr;
3455  {
3457  KeyExpr = ParseAssignmentExpression();
3458  if (KeyExpr.isInvalid()) {
3459  // We must manually skip to a '}', otherwise the expression skipper will
3460  // stop at the '}' when it skips to the ';'. We want it to skip beyond
3461  // the enclosing expression.
3462  SkipUntil(tok::r_brace, StopAtSemi);
3463  return KeyExpr;
3464  }
3465  }
3466 
3467  if (ExpectAndConsume(tok::colon)) {
3468  SkipUntil(tok::r_brace, StopAtSemi);
3469  return ExprError();
3470  }
3471 
3473  if (ValueExpr.isInvalid()) {
3474  // We must manually skip to a '}', otherwise the expression skipper will
3475  // stop at the '}' when it skips to the ';'. We want it to skip beyond
3476  // the enclosing expression.
3477  SkipUntil(tok::r_brace, StopAtSemi);
3478  return ValueExpr;
3479  }
3480 
3481  // Check the key and value for possible typos
3482  KeyExpr = Actions.CorrectDelayedTyposInExpr(KeyExpr.get());
3483  ValueExpr = Actions.CorrectDelayedTyposInExpr(ValueExpr.get());
3484  if (KeyExpr.isInvalid() || ValueExpr.isInvalid())
3485  HasInvalidEltExpr = true;
3486 
3487  // Parse the ellipsis that designates this as a pack expansion. Do not
3488  // ActOnPackExpansion here, leave it to template instantiation time where
3489  // we can get better diagnostics.
3490  SourceLocation EllipsisLoc;
3491  if (getLangOpts().CPlusPlus)
3492  TryConsumeToken(tok::ellipsis, EllipsisLoc);
3493 
3494  // We have a valid expression. Collect it in a vector so we can
3495  // build the argument list.
3496  ObjCDictionaryElement Element = {
3497  KeyExpr.get(), ValueExpr.get(), EllipsisLoc, None
3498  };
3499  Elements.push_back(Element);
3500 
3501  if (!TryConsumeToken(tok::comma) && Tok.isNot(tok::r_brace))
3502  return ExprError(Diag(Tok, diag::err_expected_either) << tok::r_brace
3503  << tok::comma);
3504  }
3505  SourceLocation EndLoc = ConsumeBrace();
3506 
3507  if (HasInvalidEltExpr)
3508  return ExprError();
3509 
3510  // Create the ObjCDictionaryLiteral.
3511  return Actions.BuildObjCDictionaryLiteral(SourceRange(AtLoc, EndLoc),
3512  Elements);
3513 }
3514 
3515 /// objc-encode-expression:
3516 /// \@encode ( type-name )
3517 ExprResult
3518 Parser::ParseObjCEncodeExpression(SourceLocation AtLoc) {
3519  assert(Tok.isObjCAtKeyword(tok::objc_encode) && "Not an @encode expression!");
3520 
3521  SourceLocation EncLoc = ConsumeToken();
3522 
3523  if (Tok.isNot(tok::l_paren))
3524  return ExprError(Diag(Tok, diag::err_expected_lparen_after) << "@encode");
3525 
3526  BalancedDelimiterTracker T(*this, tok::l_paren);
3527  T.consumeOpen();
3528 
3529  TypeResult Ty = ParseTypeName();
3530 
3531  T.consumeClose();
3532 
3533  if (Ty.isInvalid())
3534  return ExprError();
3535 
3536  return Actions.ParseObjCEncodeExpression(AtLoc, EncLoc, T.getOpenLocation(),
3537  Ty.get(), T.getCloseLocation());
3538 }
3539 
3540 /// objc-protocol-expression
3541 /// \@protocol ( protocol-name )
3542 ExprResult
3543 Parser::ParseObjCProtocolExpression(SourceLocation AtLoc) {
3544  SourceLocation ProtoLoc = ConsumeToken();
3545 
3546  if (Tok.isNot(tok::l_paren))
3547  return ExprError(Diag(Tok, diag::err_expected_lparen_after) << "@protocol");
3548 
3549  BalancedDelimiterTracker T(*this, tok::l_paren);
3550  T.consumeOpen();
3551 
3552  if (expectIdentifier())
3553  return ExprError();
3554 
3555  IdentifierInfo *protocolId = Tok.getIdentifierInfo();
3556  SourceLocation ProtoIdLoc = ConsumeToken();
3557 
3558  T.consumeClose();
3559 
3560  return Actions.ParseObjCProtocolExpression(protocolId, AtLoc, ProtoLoc,
3561  T.getOpenLocation(), ProtoIdLoc,
3562  T.getCloseLocation());
3563 }
3564 
3565 /// objc-selector-expression
3566 /// @selector '(' '('[opt] objc-keyword-selector ')'[opt] ')'
3567 ExprResult Parser::ParseObjCSelectorExpression(SourceLocation AtLoc) {
3568  SourceLocation SelectorLoc = ConsumeToken();
3569 
3570  if (Tok.isNot(tok::l_paren))
3571  return ExprError(Diag(Tok, diag::err_expected_lparen_after) << "@selector");
3572 
3574  SourceLocation sLoc;
3575 
3576  BalancedDelimiterTracker T(*this, tok::l_paren);
3577  T.consumeOpen();
3578  bool HasOptionalParen = Tok.is(tok::l_paren);
3579  if (HasOptionalParen)
3580  ConsumeParen();
3581 
3582  if (Tok.is(tok::code_completion)) {
3583  Actions.CodeCompleteObjCSelector(getCurScope(), KeyIdents);
3584  cutOffParsing();
3585  return ExprError();
3586  }
3587 
3588  IdentifierInfo *SelIdent = ParseObjCSelectorPiece(sLoc);
3589  if (!SelIdent && // missing selector name.
3590  Tok.isNot(tok::colon) && Tok.isNot(tok::coloncolon))
3591  return ExprError(Diag(Tok, diag::err_expected) << tok::identifier);
3592 
3593  KeyIdents.push_back(SelIdent);
3594 
3595  unsigned nColons = 0;
3596  if (Tok.isNot(tok::r_paren)) {
3597  while (1) {
3598  if (TryConsumeToken(tok::coloncolon)) { // Handle :: in C++.
3599  ++nColons;
3600  KeyIdents.push_back(nullptr);
3601  } else if (ExpectAndConsume(tok::colon)) // Otherwise expect ':'.
3602  return ExprError();
3603  ++nColons;
3604 
3605  if (Tok.is(tok::r_paren))
3606  break;
3607 
3608  if (Tok.is(tok::code_completion)) {
3609  Actions.CodeCompleteObjCSelector(getCurScope(), KeyIdents);
3610  cutOffParsing();
3611  return ExprError();
3612  }
3613 
3614  // Check for another keyword selector.
3615  SourceLocation Loc;
3616  SelIdent = ParseObjCSelectorPiece(Loc);
3617  KeyIdents.push_back(SelIdent);
3618  if (!SelIdent && Tok.isNot(tok::colon) && Tok.isNot(tok::coloncolon))
3619  break;
3620  }
3621  }
3622  if (HasOptionalParen && Tok.is(tok::r_paren))
3623  ConsumeParen(); // ')'
3624  T.consumeClose();
3625  Selector Sel = PP.getSelectorTable().getSelector(nColons, &KeyIdents[0]);
3626  return Actions.ParseObjCSelectorExpression(Sel, AtLoc, SelectorLoc,
3627  T.getOpenLocation(),
3628  T.getCloseLocation(),
3629  !HasOptionalParen);
3630 }
3631 
3632 void Parser::ParseLexedObjCMethodDefs(LexedMethod &LM, bool parseMethod) {
3633  // MCDecl might be null due to error in method or c-function prototype, etc.
3634  Decl *MCDecl = LM.D;
3635  bool skip = MCDecl &&
3636  ((parseMethod && !Actions.isObjCMethodDecl(MCDecl)) ||
3637  (!parseMethod && Actions.isObjCMethodDecl(MCDecl)));
3638  if (skip)
3639  return;
3640 
3641  // Save the current token position.
3642  SourceLocation OrigLoc = Tok.getLocation();
3643 
3644  assert(!LM.Toks.empty() && "ParseLexedObjCMethodDef - Empty body!");
3645  // Store an artificial EOF token to ensure that we don't run off the end of
3646  // the method's body when we come to parse it.
3647  Token Eof;
3648  Eof.startToken();
3649  Eof.setKind(tok::eof);
3650  Eof.setEofData(MCDecl);
3651  Eof.setLocation(OrigLoc);
3652  LM.Toks.push_back(Eof);
3653  // Append the current token at the end of the new token stream so that it
3654  // doesn't get lost.
3655  LM.Toks.push_back(Tok);
3656  PP.EnterTokenStream(LM.Toks, true, /*IsReinject*/true);
3657 
3658  // Consume the previously pushed token.
3659  ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
3660 
3661  assert(Tok.isOneOf(tok::l_brace, tok::kw_try, tok::colon) &&
3662  "Inline objective-c method not starting with '{' or 'try' or ':'");
3663  // Enter a scope for the method or c-function body.
3664  ParseScope BodyScope(this, (parseMethod ? Scope::ObjCMethodScope : 0) |
3667 
3668  // Tell the actions module that we have entered a method or c-function definition
3669  // with the specified Declarator for the method/function.
3670  if (parseMethod)
3671  Actions.ActOnStartOfObjCMethodDef(getCurScope(), MCDecl);
3672  else
3673  Actions.ActOnStartOfFunctionDef(getCurScope(), MCDecl);
3674  if (Tok.is(tok::kw_try))
3675  ParseFunctionTryBlock(MCDecl, BodyScope);
3676  else {
3677  if (Tok.is(tok::colon))
3678  ParseConstructorInitializer(MCDecl);
3679  else
3680  Actions.ActOnDefaultCtorInitializers(MCDecl);
3681  ParseFunctionStatementBody(MCDecl, BodyScope);
3682  }
3683 
3684  if (Tok.getLocation() != OrigLoc) {
3685  // Due to parsing error, we either went over the cached tokens or
3686  // there are still cached tokens left. If it's the latter case skip the
3687  // leftover tokens.
3688  // Since this is an uncommon situation that should be avoided, use the
3689  // expensive isBeforeInTranslationUnit call.
3690  if (PP.getSourceManager().isBeforeInTranslationUnit(Tok.getLocation(),
3691  OrigLoc))
3692  while (Tok.getLocation() != OrigLoc && Tok.isNot(tok::eof))
3693  ConsumeAnyToken();
3694  }
3695  // Clean up the remaining EOF token.
3696  ConsumeAnyToken();
3697 }
AttributePool & getAttributePool() const
Definition: DeclSpec.h:1904
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:504
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:123
A (possibly-)qualified type.
Definition: Type.h:654
This is a scope that corresponds to the parameters within a function prototype.
Definition: Scope.h:81
ObjCDeclQualifier getObjCDeclQualifier() const
Definition: DeclSpec.h:859
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:2224
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:994
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:872
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:814
StringRef P
The base class of the type hierarchy.
Definition: Type.h:1450
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:2496
void setObjCQualifiers(ObjCDeclSpec *quals)
Definition: DeclSpec.h:804
ActionResult< Stmt * > StmtResult
Definition: Ownership.h:264
Information about one declarator, including the parsed type information and the identifier.
Definition: DeclSpec.h:1792
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:11464
friend class ObjCDeclContextSwitch
Definition: Parser.h:62
const IdentifierInfo * getSetterName() const
Definition: DeclSpec.h:907
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:1118
const Token & NextToken()
NextToken - This peeks ahead one token and returns it without consuming it.
Definition: Parser.h:759
bool TryConsumeToken(tok::TokenKind Expected)
Definition: Parser.h:460
The message is a class message, and the identifier is a type name.
Definition: Sema.h:9144
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:55
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:11490
bool isInvalidType() const
Definition: DeclSpec.h:2530
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:9091
static ParsedType getTypeAnnotation(const Token &Tok)
getTypeAnnotation - Read a parsed type out of an annotation token.
Definition: Parser.h:764
PtrTy get() const
Definition: Ownership.h:170
bool isNot(T Kind) const
Definition: FormatToken.h:330
Whether values of this type can be null is (explicitly) unspecified.
ObjCContainerKind
Definition: Sema.h:8861
unsigned getNumTypeObjects() const
Return the number of types applied to this declarator.
Definition: DeclSpec.h:2220
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:480
void addAtEnd(ParsedAttr *newAttr)
Definition: ParsedAttr.h:738
IdentifierInfo * getIdentifier() const
Definition: DeclSpec.h:2172
DeclSpec & getMutableDeclSpec()
getMutableDeclSpec - Return a non-const version of the DeclSpec.
Definition: DeclSpec.h:1902
Sema - This implements semantic analysis and AST building for C.
Definition: Sema.h:336
bool acceptsObjCTypeParams() const
Determines if this is an ObjC interface type that may accept type parameters.
Definition: Type.cpp:1526
bool isOneOf(A K1, B K2) const
Definition: FormatToken.h:323
void setSetterName(IdentifierInfo *name, SourceLocation loc)
Definition: DeclSpec.h:910
const ParsedAttributesView & getAttrs() const
If there are attributes applied to this declaratorchunk, return them.
Definition: DeclSpec.h:1567
SourceLocation NameLoc
Definition: Sema.h:9084
This represents one expression.
Definition: Expr.h:108
The message is an instance message.
Definition: Sema.h:9141
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:11461
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:1749
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:11467
bool isNull() const
Return true if this QualType doesn&#39;t point to a type yet.
Definition: Type.h:719
ObjCTypeParamVariance
Describes the variance of a given generic parameter.
Definition: DeclObjC.h:546
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:423
PrettyDeclStackTraceEntry - If a crash occurs in the parser while parsing something related to a decl...
const LangOptions & getLangOpts() const
Definition: Parser.h:407
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:877
A class for parsing a DeclSpec.
ObjCDeclQualifier
ObjCDeclQualifier - Qualifier used on types in method declarations.
Definition: DeclSpec.h:822
void CodeCompleteObjCAtDirective(Scope *S)
Kind
Stop skipping at semicolon.
Definition: Parser.h:1098
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:1800
bool is(tok::TokenKind Kind) const
Definition: FormatToken.h:314
std::pair< NullabilityKind, bool > DiagNullabilityKind
A nullability kind paired with a bit indicating whether it used a context-sensitive keyword...
Definition: Diagnostic.h:1295
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:869
The message is sent to &#39;super&#39;.
Definition: Sema.h:9139
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:414
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:9088
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:1097
void setObjCDeclQualifier(ObjCDeclQualifier DQVal)
Definition: DeclSpec.h:862
const TargetInfo & getTargetInfo() const
Definition: Parser.h:408
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Definition: Parser.cpp:72
SourceLocation getNullabilityLoc() const
Definition: DeclSpec.h:884
void setNullability(SourceLocation loc, NullabilityKind kind)
Definition: DeclSpec.h:891
ExprResult ParseAssignmentExpression(TypeCastState isTypeCast=NotTypeCast)
Parse an expr that doesn&#39;t include (top-level) commas.
Definition: ParseExpr.cpp:160
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:796
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2178
X
Add a minimal nested name specifier fixit hint to allow lookup of a tag name from an outer enclosing ...
Definition: SemaDecl.cpp:14781
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:452
const DeclSpec & getDeclSpec() const
getDeclSpec - Return the declaration-specifier that this declarator was declared with.
Definition: DeclSpec.h:1895
Stores a list of Objective-C type parameters for a parameterized class or a category/extension thereo...
Definition: DeclObjC.h:649
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:899
ParamInfo - An array of paraminfo objects is allocated whenever a function declarator is parsed...
Definition: DeclSpec.h:1250
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:1207
void setGetterName(IdentifierInfo *name, SourceLocation loc)
Definition: DeclSpec.h:902
void enter(ObjCTypeParamList *P)
Definition: ParseObjc.cpp:110
bool isObjCAtKeyword(tok::ObjCKeywordKind Kind) const
Definition: FormatToken.h:365
static OpaquePtr getFromOpaquePtr(void *P)
Definition: Ownership.h:91
AttributePool & getAttributePool() const
Definition: DeclSpec.h:760
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:787
IdentifierInfo * Name
Definition: Sema.h:9083
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:1100