clang  3.8.0
ParseDeclCXX.cpp
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1 //===--- ParseDeclCXX.cpp - C++ Declaration Parsing -------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the C++ Declaration portions of the Parser interfaces.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/Parse/Parser.h"
15 #include "RAIIObjectsForParser.h"
16 #include "clang/AST/ASTContext.h"
17 #include "clang/AST/DeclTemplate.h"
18 #include "clang/Basic/Attributes.h"
19 #include "clang/Basic/CharInfo.h"
21 #include "clang/Basic/TargetInfo.h"
23 #include "clang/Sema/DeclSpec.h"
26 #include "clang/Sema/Scope.h"
28 #include "llvm/ADT/SmallString.h"
29 
30 using namespace clang;
31 
32 /// ParseNamespace - We know that the current token is a namespace keyword. This
33 /// may either be a top level namespace or a block-level namespace alias. If
34 /// there was an inline keyword, it has already been parsed.
35 ///
36 /// namespace-definition: [C++ 7.3: basic.namespace]
37 /// named-namespace-definition
38 /// unnamed-namespace-definition
39 ///
40 /// unnamed-namespace-definition:
41 /// 'inline'[opt] 'namespace' attributes[opt] '{' namespace-body '}'
42 ///
43 /// named-namespace-definition:
44 /// original-namespace-definition
45 /// extension-namespace-definition
46 ///
47 /// original-namespace-definition:
48 /// 'inline'[opt] 'namespace' identifier attributes[opt]
49 /// '{' namespace-body '}'
50 ///
51 /// extension-namespace-definition:
52 /// 'inline'[opt] 'namespace' original-namespace-name
53 /// '{' namespace-body '}'
54 ///
55 /// namespace-alias-definition: [C++ 7.3.2: namespace.alias]
56 /// 'namespace' identifier '=' qualified-namespace-specifier ';'
57 ///
58 Parser::DeclGroupPtrTy Parser::ParseNamespace(unsigned Context,
59  SourceLocation &DeclEnd,
60  SourceLocation InlineLoc) {
61  assert(Tok.is(tok::kw_namespace) && "Not a namespace!");
62  SourceLocation NamespaceLoc = ConsumeToken(); // eat the 'namespace'.
63  ObjCDeclContextSwitch ObjCDC(*this);
64 
65  if (Tok.is(tok::code_completion)) {
67  cutOffParsing();
68  return DeclGroupPtrTy();
69  }
70 
71  SourceLocation IdentLoc;
72  IdentifierInfo *Ident = nullptr;
73  std::vector<SourceLocation> ExtraIdentLoc;
74  std::vector<IdentifierInfo*> ExtraIdent;
75  std::vector<SourceLocation> ExtraNamespaceLoc;
76 
77  ParsedAttributesWithRange attrs(AttrFactory);
78  SourceLocation attrLoc;
79  if (getLangOpts().CPlusPlus11 && isCXX11AttributeSpecifier()) {
80  if (!getLangOpts().CPlusPlus1z)
81  Diag(Tok.getLocation(), diag::warn_cxx14_compat_attribute)
82  << 0 /*namespace*/;
83  attrLoc = Tok.getLocation();
84  ParseCXX11Attributes(attrs);
85  }
86 
87  if (Tok.is(tok::identifier)) {
88  Ident = Tok.getIdentifierInfo();
89  IdentLoc = ConsumeToken(); // eat the identifier.
90  while (Tok.is(tok::coloncolon) && NextToken().is(tok::identifier)) {
91  ExtraNamespaceLoc.push_back(ConsumeToken());
92  ExtraIdent.push_back(Tok.getIdentifierInfo());
93  ExtraIdentLoc.push_back(ConsumeToken());
94  }
95  }
96 
97  // A nested namespace definition cannot have attributes.
98  if (!ExtraNamespaceLoc.empty() && attrLoc.isValid())
99  Diag(attrLoc, diag::err_unexpected_nested_namespace_attribute);
100 
101  // Read label attributes, if present.
102  if (Tok.is(tok::kw___attribute)) {
103  attrLoc = Tok.getLocation();
104  ParseGNUAttributes(attrs);
105  }
106 
107  if (Tok.is(tok::equal)) {
108  if (!Ident) {
109  Diag(Tok, diag::err_expected) << tok::identifier;
110  // Skip to end of the definition and eat the ';'.
111  SkipUntil(tok::semi);
112  return DeclGroupPtrTy();
113  }
114  if (attrLoc.isValid())
115  Diag(attrLoc, diag::err_unexpected_namespace_attributes_alias);
116  if (InlineLoc.isValid())
117  Diag(InlineLoc, diag::err_inline_namespace_alias)
118  << FixItHint::CreateRemoval(InlineLoc);
119  Decl *NSAlias = ParseNamespaceAlias(NamespaceLoc, IdentLoc, Ident, DeclEnd);
120  return Actions.ConvertDeclToDeclGroup(NSAlias);
121 }
122 
123  BalancedDelimiterTracker T(*this, tok::l_brace);
124  if (T.consumeOpen()) {
125  if (Ident)
126  Diag(Tok, diag::err_expected) << tok::l_brace;
127  else
128  Diag(Tok, diag::err_expected_either) << tok::identifier << tok::l_brace;
129  return DeclGroupPtrTy();
130  }
131 
132  if (getCurScope()->isClassScope() || getCurScope()->isTemplateParamScope() ||
133  getCurScope()->isInObjcMethodScope() || getCurScope()->getBlockParent() ||
134  getCurScope()->getFnParent()) {
135  Diag(T.getOpenLocation(), diag::err_namespace_nonnamespace_scope);
136  SkipUntil(tok::r_brace);
137  return DeclGroupPtrTy();
138  }
139 
140  if (ExtraIdent.empty()) {
141  // Normal namespace definition, not a nested-namespace-definition.
142  } else if (InlineLoc.isValid()) {
143  Diag(InlineLoc, diag::err_inline_nested_namespace_definition);
144  } else if (getLangOpts().CPlusPlus1z) {
145  Diag(ExtraNamespaceLoc[0],
146  diag::warn_cxx14_compat_nested_namespace_definition);
147  } else {
148  TentativeParsingAction TPA(*this);
149  SkipUntil(tok::r_brace, StopBeforeMatch);
150  Token rBraceToken = Tok;
151  TPA.Revert();
152 
153  if (!rBraceToken.is(tok::r_brace)) {
154  Diag(ExtraNamespaceLoc[0], diag::ext_nested_namespace_definition)
155  << SourceRange(ExtraNamespaceLoc.front(), ExtraIdentLoc.back());
156  } else {
157  std::string NamespaceFix;
158  for (std::vector<IdentifierInfo*>::iterator I = ExtraIdent.begin(),
159  E = ExtraIdent.end(); I != E; ++I) {
160  NamespaceFix += " { namespace ";
161  NamespaceFix += (*I)->getName();
162  }
163 
164  std::string RBraces;
165  for (unsigned i = 0, e = ExtraIdent.size(); i != e; ++i)
166  RBraces += "} ";
167 
168  Diag(ExtraNamespaceLoc[0], diag::ext_nested_namespace_definition)
169  << FixItHint::CreateReplacement(SourceRange(ExtraNamespaceLoc.front(),
170  ExtraIdentLoc.back()),
171  NamespaceFix)
172  << FixItHint::CreateInsertion(rBraceToken.getLocation(), RBraces);
173  }
174  }
175 
176  // If we're still good, complain about inline namespaces in non-C++0x now.
177  if (InlineLoc.isValid())
178  Diag(InlineLoc, getLangOpts().CPlusPlus11 ?
179  diag::warn_cxx98_compat_inline_namespace : diag::ext_inline_namespace);
180 
181  // Enter a scope for the namespace.
182  ParseScope NamespaceScope(this, Scope::DeclScope);
183 
184  UsingDirectiveDecl *ImplicitUsingDirectiveDecl = nullptr;
185  Decl *NamespcDecl =
186  Actions.ActOnStartNamespaceDef(getCurScope(), InlineLoc, NamespaceLoc,
187  IdentLoc, Ident, T.getOpenLocation(),
188  attrs.getList(), ImplicitUsingDirectiveDecl);
189 
190  PrettyDeclStackTraceEntry CrashInfo(Actions, NamespcDecl, NamespaceLoc,
191  "parsing namespace");
192 
193  // Parse the contents of the namespace. This includes parsing recovery on
194  // any improperly nested namespaces.
195  ParseInnerNamespace(ExtraIdentLoc, ExtraIdent, ExtraNamespaceLoc, 0,
196  InlineLoc, attrs, T);
197 
198  // Leave the namespace scope.
199  NamespaceScope.Exit();
200 
201  DeclEnd = T.getCloseLocation();
202  Actions.ActOnFinishNamespaceDef(NamespcDecl, DeclEnd);
203 
204  return Actions.ConvertDeclToDeclGroup(NamespcDecl,
205  ImplicitUsingDirectiveDecl);
206 }
207 
208 /// ParseInnerNamespace - Parse the contents of a namespace.
209 void Parser::ParseInnerNamespace(std::vector<SourceLocation> &IdentLoc,
210  std::vector<IdentifierInfo *> &Ident,
211  std::vector<SourceLocation> &NamespaceLoc,
212  unsigned int index, SourceLocation &InlineLoc,
213  ParsedAttributes &attrs,
214  BalancedDelimiterTracker &Tracker) {
215  if (index == Ident.size()) {
216  while (!tryParseMisplacedModuleImport() && Tok.isNot(tok::r_brace) &&
217  Tok.isNot(tok::eof)) {
218  ParsedAttributesWithRange attrs(AttrFactory);
219  MaybeParseCXX11Attributes(attrs);
220  MaybeParseMicrosoftAttributes(attrs);
221  ParseExternalDeclaration(attrs);
222  }
223 
224  // The caller is what called check -- we are simply calling
225  // the close for it.
226  Tracker.consumeClose();
227 
228  return;
229  }
230 
231  // Handle a nested namespace definition.
232  // FIXME: Preserve the source information through to the AST rather than
233  // desugaring it here.
234  ParseScope NamespaceScope(this, Scope::DeclScope);
235  UsingDirectiveDecl *ImplicitUsingDirectiveDecl = nullptr;
236  Decl *NamespcDecl =
238  NamespaceLoc[index], IdentLoc[index],
239  Ident[index], Tracker.getOpenLocation(),
240  attrs.getList(), ImplicitUsingDirectiveDecl);
241  assert(!ImplicitUsingDirectiveDecl &&
242  "nested namespace definition cannot define anonymous namespace");
243 
244  ParseInnerNamespace(IdentLoc, Ident, NamespaceLoc, ++index, InlineLoc,
245  attrs, Tracker);
246 
247  NamespaceScope.Exit();
248  Actions.ActOnFinishNamespaceDef(NamespcDecl, Tracker.getCloseLocation());
249 }
250 
251 /// ParseNamespaceAlias - Parse the part after the '=' in a namespace
252 /// alias definition.
253 ///
254 Decl *Parser::ParseNamespaceAlias(SourceLocation NamespaceLoc,
255  SourceLocation AliasLoc,
256  IdentifierInfo *Alias,
257  SourceLocation &DeclEnd) {
258  assert(Tok.is(tok::equal) && "Not equal token");
259 
260  ConsumeToken(); // eat the '='.
261 
262  if (Tok.is(tok::code_completion)) {
264  cutOffParsing();
265  return nullptr;
266  }
267 
268  CXXScopeSpec SS;
269  // Parse (optional) nested-name-specifier.
270  ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false);
271 
272  if (SS.isInvalid() || Tok.isNot(tok::identifier)) {
273  Diag(Tok, diag::err_expected_namespace_name);
274  // Skip to end of the definition and eat the ';'.
275  SkipUntil(tok::semi);
276  return nullptr;
277  }
278 
279  // Parse identifier.
280  IdentifierInfo *Ident = Tok.getIdentifierInfo();
281  SourceLocation IdentLoc = ConsumeToken();
282 
283  // Eat the ';'.
284  DeclEnd = Tok.getLocation();
285  if (ExpectAndConsume(tok::semi, diag::err_expected_semi_after_namespace_name))
286  SkipUntil(tok::semi);
287 
288  return Actions.ActOnNamespaceAliasDef(getCurScope(), NamespaceLoc, AliasLoc,
289  Alias, SS, IdentLoc, Ident);
290 }
291 
292 /// ParseLinkage - We know that the current token is a string_literal
293 /// and just before that, that extern was seen.
294 ///
295 /// linkage-specification: [C++ 7.5p2: dcl.link]
296 /// 'extern' string-literal '{' declaration-seq[opt] '}'
297 /// 'extern' string-literal declaration
298 ///
299 Decl *Parser::ParseLinkage(ParsingDeclSpec &DS, unsigned Context) {
300  assert(isTokenStringLiteral() && "Not a string literal!");
301  ExprResult Lang = ParseStringLiteralExpression(false);
302 
303  ParseScope LinkageScope(this, Scope::DeclScope);
304  Decl *LinkageSpec =
305  Lang.isInvalid()
306  ? nullptr
308  getCurScope(), DS.getSourceRange().getBegin(), Lang.get(),
309  Tok.is(tok::l_brace) ? Tok.getLocation() : SourceLocation());
310 
311  ParsedAttributesWithRange attrs(AttrFactory);
312  MaybeParseCXX11Attributes(attrs);
313  MaybeParseMicrosoftAttributes(attrs);
314 
315  if (Tok.isNot(tok::l_brace)) {
316  // Reset the source range in DS, as the leading "extern"
317  // does not really belong to the inner declaration ...
320  // ... but anyway remember that such an "extern" was seen.
321  DS.setExternInLinkageSpec(true);
322  ParseExternalDeclaration(attrs, &DS);
323  return LinkageSpec ? Actions.ActOnFinishLinkageSpecification(
324  getCurScope(), LinkageSpec, SourceLocation())
325  : nullptr;
326  }
327 
328  DS.abort();
329 
330  ProhibitAttributes(attrs);
331 
332  BalancedDelimiterTracker T(*this, tok::l_brace);
333  T.consumeOpen();
334 
335  unsigned NestedModules = 0;
336  while (true) {
337  switch (Tok.getKind()) {
338  case tok::annot_module_begin:
339  ++NestedModules;
341  continue;
342 
343  case tok::annot_module_end:
344  if (!NestedModules)
345  break;
346  --NestedModules;
348  continue;
349 
350  case tok::annot_module_include:
352  continue;
353 
354  case tok::eof:
355  break;
356 
357  case tok::r_brace:
358  if (!NestedModules)
359  break;
360  // Fall through.
361  default:
362  ParsedAttributesWithRange attrs(AttrFactory);
363  MaybeParseCXX11Attributes(attrs);
364  MaybeParseMicrosoftAttributes(attrs);
365  ParseExternalDeclaration(attrs);
366  continue;
367  }
368 
369  break;
370  }
371 
372  T.consumeClose();
373  return LinkageSpec ? Actions.ActOnFinishLinkageSpecification(
374  getCurScope(), LinkageSpec, T.getCloseLocation())
375  : nullptr;
376 }
377 
378 /// ParseUsingDirectiveOrDeclaration - Parse C++ using using-declaration or
379 /// using-directive. Assumes that current token is 'using'.
380 Decl *Parser::ParseUsingDirectiveOrDeclaration(unsigned Context,
381  const ParsedTemplateInfo &TemplateInfo,
382  SourceLocation &DeclEnd,
383  ParsedAttributesWithRange &attrs,
384  Decl **OwnedType) {
385  assert(Tok.is(tok::kw_using) && "Not using token");
386  ObjCDeclContextSwitch ObjCDC(*this);
387 
388  // Eat 'using'.
389  SourceLocation UsingLoc = ConsumeToken();
390 
391  if (Tok.is(tok::code_completion)) {
392  Actions.CodeCompleteUsing(getCurScope());
393  cutOffParsing();
394  return nullptr;
395  }
396 
397  // 'using namespace' means this is a using-directive.
398  if (Tok.is(tok::kw_namespace)) {
399  // Template parameters are always an error here.
400  if (TemplateInfo.Kind) {
401  SourceRange R = TemplateInfo.getSourceRange();
402  Diag(UsingLoc, diag::err_templated_using_directive_declaration)
403  << 0 /* directive */ << R << FixItHint::CreateRemoval(R);
404  }
405 
406  return ParseUsingDirective(Context, UsingLoc, DeclEnd, attrs);
407  }
408 
409  // Otherwise, it must be a using-declaration or an alias-declaration.
410 
411  // Using declarations can't have attributes.
412  ProhibitAttributes(attrs);
413 
414  return ParseUsingDeclaration(Context, TemplateInfo, UsingLoc, DeclEnd,
415  AS_none, OwnedType);
416 }
417 
418 /// ParseUsingDirective - Parse C++ using-directive, assumes
419 /// that current token is 'namespace' and 'using' was already parsed.
420 ///
421 /// using-directive: [C++ 7.3.p4: namespace.udir]
422 /// 'using' 'namespace' ::[opt] nested-name-specifier[opt]
423 /// namespace-name ;
424 /// [GNU] using-directive:
425 /// 'using' 'namespace' ::[opt] nested-name-specifier[opt]
426 /// namespace-name attributes[opt] ;
427 ///
428 Decl *Parser::ParseUsingDirective(unsigned Context,
429  SourceLocation UsingLoc,
430  SourceLocation &DeclEnd,
431  ParsedAttributes &attrs) {
432  assert(Tok.is(tok::kw_namespace) && "Not 'namespace' token");
433 
434  // Eat 'namespace'.
435  SourceLocation NamespcLoc = ConsumeToken();
436 
437  if (Tok.is(tok::code_completion)) {
439  cutOffParsing();
440  return nullptr;
441  }
442 
443  CXXScopeSpec SS;
444  // Parse (optional) nested-name-specifier.
445  ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false);
446 
447  IdentifierInfo *NamespcName = nullptr;
448  SourceLocation IdentLoc = SourceLocation();
449 
450  // Parse namespace-name.
451  if (SS.isInvalid() || Tok.isNot(tok::identifier)) {
452  Diag(Tok, diag::err_expected_namespace_name);
453  // If there was invalid namespace name, skip to end of decl, and eat ';'.
454  SkipUntil(tok::semi);
455  // FIXME: Are there cases, when we would like to call ActOnUsingDirective?
456  return nullptr;
457  }
458 
459  // Parse identifier.
460  NamespcName = Tok.getIdentifierInfo();
461  IdentLoc = ConsumeToken();
462 
463  // Parse (optional) attributes (most likely GNU strong-using extension).
464  bool GNUAttr = false;
465  if (Tok.is(tok::kw___attribute)) {
466  GNUAttr = true;
467  ParseGNUAttributes(attrs);
468  }
469 
470  // Eat ';'.
471  DeclEnd = Tok.getLocation();
472  if (ExpectAndConsume(tok::semi,
473  GNUAttr ? diag::err_expected_semi_after_attribute_list
474  : diag::err_expected_semi_after_namespace_name))
475  SkipUntil(tok::semi);
476 
477  return Actions.ActOnUsingDirective(getCurScope(), UsingLoc, NamespcLoc, SS,
478  IdentLoc, NamespcName, attrs.getList());
479 }
480 
481 /// ParseUsingDeclaration - Parse C++ using-declaration or alias-declaration.
482 /// Assumes that 'using' was already seen.
483 ///
484 /// using-declaration: [C++ 7.3.p3: namespace.udecl]
485 /// 'using' 'typename'[opt] ::[opt] nested-name-specifier
486 /// unqualified-id
487 /// 'using' :: unqualified-id
488 ///
489 /// alias-declaration: C++11 [dcl.dcl]p1
490 /// 'using' identifier attribute-specifier-seq[opt] = type-id ;
491 ///
492 Decl *Parser::ParseUsingDeclaration(unsigned Context,
493  const ParsedTemplateInfo &TemplateInfo,
494  SourceLocation UsingLoc,
495  SourceLocation &DeclEnd,
496  AccessSpecifier AS,
497  Decl **OwnedType) {
498  CXXScopeSpec SS;
499  SourceLocation TypenameLoc;
500  bool HasTypenameKeyword = false;
501 
502  // Check for misplaced attributes before the identifier in an
503  // alias-declaration.
504  ParsedAttributesWithRange MisplacedAttrs(AttrFactory);
505  MaybeParseCXX11Attributes(MisplacedAttrs);
506 
507  // Ignore optional 'typename'.
508  // FIXME: This is wrong; we should parse this as a typename-specifier.
509  if (TryConsumeToken(tok::kw_typename, TypenameLoc))
510  HasTypenameKeyword = true;
511 
512  if (Tok.is(tok::kw___super)) {
513  Diag(Tok.getLocation(), diag::err_super_in_using_declaration);
514  SkipUntil(tok::semi);
515  return nullptr;
516  }
517 
518  // Parse nested-name-specifier.
519  IdentifierInfo *LastII = nullptr;
520  ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false,
521  /*MayBePseudoDtor=*/nullptr,
522  /*IsTypename=*/false,
523  /*LastII=*/&LastII);
524 
525  // Check nested-name specifier.
526  if (SS.isInvalid()) {
527  SkipUntil(tok::semi);
528  return nullptr;
529  }
530 
531  SourceLocation TemplateKWLoc;
533 
534  // Parse the unqualified-id. We allow parsing of both constructor and
535  // destructor names and allow the action module to diagnose any semantic
536  // errors.
537  //
538  // C++11 [class.qual]p2:
539  // [...] in a using-declaration that is a member-declaration, if the name
540  // specified after the nested-name-specifier is the same as the identifier
541  // or the simple-template-id's template-name in the last component of the
542  // nested-name-specifier, the name is [...] considered to name the
543  // constructor.
544  if (getLangOpts().CPlusPlus11 && Context == Declarator::MemberContext &&
545  Tok.is(tok::identifier) && NextToken().is(tok::semi) &&
546  SS.isNotEmpty() && LastII == Tok.getIdentifierInfo() &&
547  !SS.getScopeRep()->getAsNamespace() &&
548  !SS.getScopeRep()->getAsNamespaceAlias()) {
549  SourceLocation IdLoc = ConsumeToken();
550  ParsedType Type = Actions.getInheritingConstructorName(SS, IdLoc, *LastII);
551  Name.setConstructorName(Type, IdLoc, IdLoc);
552  } else if (ParseUnqualifiedId(
553  SS, /*EnteringContext=*/false,
554  /*AllowDestructorName=*/true,
555  /*AllowConstructorName=*/!(Tok.is(tok::identifier) &&
556  NextToken().is(tok::equal)),
557  ParsedType(), TemplateKWLoc, Name)) {
558  SkipUntil(tok::semi);
559  return nullptr;
560  }
561 
562  ParsedAttributesWithRange Attrs(AttrFactory);
563  MaybeParseGNUAttributes(Attrs);
564  MaybeParseCXX11Attributes(Attrs);
565 
566  // Maybe this is an alias-declaration.
568  bool IsAliasDecl = Tok.is(tok::equal);
569  Decl *DeclFromDeclSpec = nullptr;
570  if (IsAliasDecl) {
571  // If we had any misplaced attributes from earlier, this is where they
572  // should have been written.
573  if (MisplacedAttrs.Range.isValid()) {
574  Diag(MisplacedAttrs.Range.getBegin(), diag::err_attributes_not_allowed)
576  Tok.getLocation(),
577  CharSourceRange::getTokenRange(MisplacedAttrs.Range))
578  << FixItHint::CreateRemoval(MisplacedAttrs.Range);
579  Attrs.takeAllFrom(MisplacedAttrs);
580  }
581 
582  ConsumeToken();
583 
584  Diag(Tok.getLocation(), getLangOpts().CPlusPlus11 ?
585  diag::warn_cxx98_compat_alias_declaration :
586  diag::ext_alias_declaration);
587 
588  // Type alias templates cannot be specialized.
589  int SpecKind = -1;
590  if (TemplateInfo.Kind == ParsedTemplateInfo::Template &&
592  SpecKind = 0;
593  if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization)
594  SpecKind = 1;
595  if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation)
596  SpecKind = 2;
597  if (SpecKind != -1) {
598  SourceRange Range;
599  if (SpecKind == 0)
600  Range = SourceRange(Name.TemplateId->LAngleLoc,
601  Name.TemplateId->RAngleLoc);
602  else
603  Range = TemplateInfo.getSourceRange();
604  Diag(Range.getBegin(), diag::err_alias_declaration_specialization)
605  << SpecKind << Range;
606  SkipUntil(tok::semi);
607  return nullptr;
608  }
609 
610  // Name must be an identifier.
611  if (Name.getKind() != UnqualifiedId::IK_Identifier) {
612  Diag(Name.StartLocation, diag::err_alias_declaration_not_identifier);
613  // No removal fixit: can't recover from this.
614  SkipUntil(tok::semi);
615  return nullptr;
616  } else if (HasTypenameKeyword)
617  Diag(TypenameLoc, diag::err_alias_declaration_not_identifier)
618  << FixItHint::CreateRemoval(SourceRange(TypenameLoc,
619  SS.isNotEmpty() ? SS.getEndLoc() : TypenameLoc));
620  else if (SS.isNotEmpty())
621  Diag(SS.getBeginLoc(), diag::err_alias_declaration_not_identifier)
623 
624  TypeAlias = ParseTypeName(nullptr, TemplateInfo.Kind
627  AS, &DeclFromDeclSpec, &Attrs);
628  if (OwnedType)
629  *OwnedType = DeclFromDeclSpec;
630  } else {
631  // C++11 attributes are not allowed on a using-declaration, but GNU ones
632  // are.
633  ProhibitAttributes(MisplacedAttrs);
634  ProhibitAttributes(Attrs);
635 
636  // Parse (optional) attributes (most likely GNU strong-using extension).
637  MaybeParseGNUAttributes(Attrs);
638  }
639 
640  // Eat ';'.
641  DeclEnd = Tok.getLocation();
642  if (ExpectAndConsume(tok::semi, diag::err_expected_after,
643  !Attrs.empty() ? "attributes list"
644  : IsAliasDecl ? "alias declaration"
645  : "using declaration"))
646  SkipUntil(tok::semi);
647 
648  // Diagnose an attempt to declare a templated using-declaration.
649  // In C++11, alias-declarations can be templates:
650  // template <...> using id = type;
651  if (TemplateInfo.Kind && !IsAliasDecl) {
652  SourceRange R = TemplateInfo.getSourceRange();
653  Diag(UsingLoc, diag::err_templated_using_directive_declaration)
654  << 1 /* declaration */ << R << FixItHint::CreateRemoval(R);
655 
656  // Unfortunately, we have to bail out instead of recovering by
657  // ignoring the parameters, just in case the nested name specifier
658  // depends on the parameters.
659  return nullptr;
660  }
661 
662  // "typename" keyword is allowed for identifiers only,
663  // because it may be a type definition.
664  if (HasTypenameKeyword && Name.getKind() != UnqualifiedId::IK_Identifier) {
665  Diag(Name.getSourceRange().getBegin(), diag::err_typename_identifiers_only)
666  << FixItHint::CreateRemoval(SourceRange(TypenameLoc));
667  // Proceed parsing, but reset the HasTypenameKeyword flag.
668  HasTypenameKeyword = false;
669  }
670 
671  if (IsAliasDecl) {
672  TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams;
673  MultiTemplateParamsArg TemplateParamsArg(
674  TemplateParams ? TemplateParams->data() : nullptr,
675  TemplateParams ? TemplateParams->size() : 0);
676  return Actions.ActOnAliasDeclaration(getCurScope(), AS, TemplateParamsArg,
677  UsingLoc, Name, Attrs.getList(),
678  TypeAlias, DeclFromDeclSpec);
679  }
680 
681  return Actions.ActOnUsingDeclaration(getCurScope(), AS,
682  /* HasUsingKeyword */ true, UsingLoc,
683  SS, Name, Attrs.getList(),
684  HasTypenameKeyword, TypenameLoc);
685 }
686 
687 /// ParseStaticAssertDeclaration - Parse C++0x or C11 static_assert-declaration.
688 ///
689 /// [C++0x] static_assert-declaration:
690 /// static_assert ( constant-expression , string-literal ) ;
691 ///
692 /// [C11] static_assert-declaration:
693 /// _Static_assert ( constant-expression , string-literal ) ;
694 ///
695 Decl *Parser::ParseStaticAssertDeclaration(SourceLocation &DeclEnd){
696  assert(Tok.isOneOf(tok::kw_static_assert, tok::kw__Static_assert) &&
697  "Not a static_assert declaration");
698 
699  if (Tok.is(tok::kw__Static_assert) && !getLangOpts().C11)
700  Diag(Tok, diag::ext_c11_static_assert);
701  if (Tok.is(tok::kw_static_assert))
702  Diag(Tok, diag::warn_cxx98_compat_static_assert);
703 
704  SourceLocation StaticAssertLoc = ConsumeToken();
705 
706  BalancedDelimiterTracker T(*this, tok::l_paren);
707  if (T.consumeOpen()) {
708  Diag(Tok, diag::err_expected) << tok::l_paren;
710  return nullptr;
711  }
712 
713  ExprResult AssertExpr(ParseConstantExpression());
714  if (AssertExpr.isInvalid()) {
716  return nullptr;
717  }
718 
719  ExprResult AssertMessage;
720  if (Tok.is(tok::r_paren)) {
722  ? diag::warn_cxx14_compat_static_assert_no_message
723  : diag::ext_static_assert_no_message)
724  << (getLangOpts().CPlusPlus1z
725  ? FixItHint()
726  : FixItHint::CreateInsertion(Tok.getLocation(), ", \"\""));
727  } else {
728  if (ExpectAndConsume(tok::comma)) {
729  SkipUntil(tok::semi);
730  return nullptr;
731  }
732 
733  if (!isTokenStringLiteral()) {
734  Diag(Tok, diag::err_expected_string_literal)
735  << /*Source='static_assert'*/1;
737  return nullptr;
738  }
739 
740  AssertMessage = ParseStringLiteralExpression();
741  if (AssertMessage.isInvalid()) {
743  return nullptr;
744  }
745  }
746 
747  T.consumeClose();
748 
749  DeclEnd = Tok.getLocation();
750  ExpectAndConsumeSemi(diag::err_expected_semi_after_static_assert);
751 
752  return Actions.ActOnStaticAssertDeclaration(StaticAssertLoc,
753  AssertExpr.get(),
754  AssertMessage.get(),
755  T.getCloseLocation());
756 }
757 
758 /// ParseDecltypeSpecifier - Parse a C++11 decltype specifier.
759 ///
760 /// 'decltype' ( expression )
761 /// 'decltype' ( 'auto' ) [C++1y]
762 ///
763 SourceLocation Parser::ParseDecltypeSpecifier(DeclSpec &DS) {
764  assert(Tok.isOneOf(tok::kw_decltype, tok::annot_decltype)
765  && "Not a decltype specifier");
766 
768  SourceLocation StartLoc = Tok.getLocation();
769  SourceLocation EndLoc;
770 
771  if (Tok.is(tok::annot_decltype)) {
772  Result = getExprAnnotation(Tok);
773  EndLoc = Tok.getAnnotationEndLoc();
774  ConsumeToken();
775  if (Result.isInvalid()) {
776  DS.SetTypeSpecError();
777  return EndLoc;
778  }
779  } else {
780  if (Tok.getIdentifierInfo()->isStr("decltype"))
781  Diag(Tok, diag::warn_cxx98_compat_decltype);
782 
783  ConsumeToken();
784 
785  BalancedDelimiterTracker T(*this, tok::l_paren);
786  if (T.expectAndConsume(diag::err_expected_lparen_after,
787  "decltype", tok::r_paren)) {
788  DS.SetTypeSpecError();
789  return T.getOpenLocation() == Tok.getLocation() ?
790  StartLoc : T.getOpenLocation();
791  }
792 
793  // Check for C++1y 'decltype(auto)'.
794  if (Tok.is(tok::kw_auto)) {
795  // No need to disambiguate here: an expression can't start with 'auto',
796  // because the typename-specifier in a function-style cast operation can't
797  // be 'auto'.
798  Diag(Tok.getLocation(),
799  getLangOpts().CPlusPlus14
800  ? diag::warn_cxx11_compat_decltype_auto_type_specifier
801  : diag::ext_decltype_auto_type_specifier);
802  ConsumeToken();
803  } else {
804  // Parse the expression
805 
806  // C++11 [dcl.type.simple]p4:
807  // The operand of the decltype specifier is an unevaluated operand.
809  nullptr,/*IsDecltype=*/true);
810  Result =
812  return E->hasPlaceholderType() ? ExprError() : E;
813  });
814  if (Result.isInvalid()) {
815  DS.SetTypeSpecError();
816  if (SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch)) {
817  EndLoc = ConsumeParen();
818  } else {
819  if (PP.isBacktrackEnabled() && Tok.is(tok::semi)) {
820  // Backtrack to get the location of the last token before the semi.
821  PP.RevertCachedTokens(2);
822  ConsumeToken(); // the semi.
823  EndLoc = ConsumeAnyToken();
824  assert(Tok.is(tok::semi));
825  } else {
826  EndLoc = Tok.getLocation();
827  }
828  }
829  return EndLoc;
830  }
831 
832  Result = Actions.ActOnDecltypeExpression(Result.get());
833  }
834 
835  // Match the ')'
836  T.consumeClose();
837  if (T.getCloseLocation().isInvalid()) {
838  DS.SetTypeSpecError();
839  // FIXME: this should return the location of the last token
840  // that was consumed (by "consumeClose()")
841  return T.getCloseLocation();
842  }
843 
844  if (Result.isInvalid()) {
845  DS.SetTypeSpecError();
846  return T.getCloseLocation();
847  }
848 
849  EndLoc = T.getCloseLocation();
850  }
851  assert(!Result.isInvalid());
852 
853  const char *PrevSpec = nullptr;
854  unsigned DiagID;
855  const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
856  // Check for duplicate type specifiers (e.g. "int decltype(a)").
857  if (Result.get()
858  ? DS.SetTypeSpecType(DeclSpec::TST_decltype, StartLoc, PrevSpec,
859  DiagID, Result.get(), Policy)
860  : DS.SetTypeSpecType(DeclSpec::TST_decltype_auto, StartLoc, PrevSpec,
861  DiagID, Policy)) {
862  Diag(StartLoc, DiagID) << PrevSpec;
863  DS.SetTypeSpecError();
864  }
865  return EndLoc;
866 }
867 
868 void Parser::AnnotateExistingDecltypeSpecifier(const DeclSpec& DS,
869  SourceLocation StartLoc,
870  SourceLocation EndLoc) {
871  // make sure we have a token we can turn into an annotation token
872  if (PP.isBacktrackEnabled())
873  PP.RevertCachedTokens(1);
874  else
875  PP.EnterToken(Tok);
876 
877  Tok.setKind(tok::annot_decltype);
878  setExprAnnotation(Tok,
879  DS.getTypeSpecType() == TST_decltype ? DS.getRepAsExpr() :
881  ExprError());
882  Tok.setAnnotationEndLoc(EndLoc);
883  Tok.setLocation(StartLoc);
884  PP.AnnotateCachedTokens(Tok);
885 }
886 
887 void Parser::ParseUnderlyingTypeSpecifier(DeclSpec &DS) {
888  assert(Tok.is(tok::kw___underlying_type) &&
889  "Not an underlying type specifier");
890 
891  SourceLocation StartLoc = ConsumeToken();
892  BalancedDelimiterTracker T(*this, tok::l_paren);
893  if (T.expectAndConsume(diag::err_expected_lparen_after,
894  "__underlying_type", tok::r_paren)) {
895  return;
896  }
897 
898  TypeResult Result = ParseTypeName();
899  if (Result.isInvalid()) {
900  SkipUntil(tok::r_paren, StopAtSemi);
901  return;
902  }
903 
904  // Match the ')'
905  T.consumeClose();
906  if (T.getCloseLocation().isInvalid())
907  return;
908 
909  const char *PrevSpec = nullptr;
910  unsigned DiagID;
911  if (DS.SetTypeSpecType(DeclSpec::TST_underlyingType, StartLoc, PrevSpec,
912  DiagID, Result.get(),
913  Actions.getASTContext().getPrintingPolicy()))
914  Diag(StartLoc, DiagID) << PrevSpec;
915  DS.setTypeofParensRange(T.getRange());
916 }
917 
918 /// ParseBaseTypeSpecifier - Parse a C++ base-type-specifier which is either a
919 /// class name or decltype-specifier. Note that we only check that the result
920 /// names a type; semantic analysis will need to verify that the type names a
921 /// class. The result is either a type or null, depending on whether a type
922 /// name was found.
923 ///
924 /// base-type-specifier: [C++11 class.derived]
925 /// class-or-decltype
926 /// class-or-decltype: [C++11 class.derived]
927 /// nested-name-specifier[opt] class-name
928 /// decltype-specifier
929 /// class-name: [C++ class.name]
930 /// identifier
931 /// simple-template-id
932 ///
933 /// In C++98, instead of base-type-specifier, we have:
934 ///
935 /// ::[opt] nested-name-specifier[opt] class-name
936 TypeResult Parser::ParseBaseTypeSpecifier(SourceLocation &BaseLoc,
937  SourceLocation &EndLocation) {
938  // Ignore attempts to use typename
939  if (Tok.is(tok::kw_typename)) {
940  Diag(Tok, diag::err_expected_class_name_not_template)
942  ConsumeToken();
943  }
944 
945  // Parse optional nested-name-specifier
946  CXXScopeSpec SS;
947  ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false);
948 
949  BaseLoc = Tok.getLocation();
950 
951  // Parse decltype-specifier
952  // tok == kw_decltype is just error recovery, it can only happen when SS
953  // isn't empty
954  if (Tok.isOneOf(tok::kw_decltype, tok::annot_decltype)) {
955  if (SS.isNotEmpty())
956  Diag(SS.getBeginLoc(), diag::err_unexpected_scope_on_base_decltype)
958  // Fake up a Declarator to use with ActOnTypeName.
959  DeclSpec DS(AttrFactory);
960 
961  EndLocation = ParseDecltypeSpecifier(DS);
962 
963  Declarator DeclaratorInfo(DS, Declarator::TypeNameContext);
964  return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
965  }
966 
967  // Check whether we have a template-id that names a type.
968  if (Tok.is(tok::annot_template_id)) {
969  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
970  if (TemplateId->Kind == TNK_Type_template ||
971  TemplateId->Kind == TNK_Dependent_template_name) {
972  AnnotateTemplateIdTokenAsType();
973 
974  assert(Tok.is(tok::annot_typename) && "template-id -> type failed");
975  ParsedType Type = getTypeAnnotation(Tok);
976  EndLocation = Tok.getAnnotationEndLoc();
977  ConsumeToken();
978 
979  if (Type)
980  return Type;
981  return true;
982  }
983 
984  // Fall through to produce an error below.
985  }
986 
987  if (Tok.isNot(tok::identifier)) {
988  Diag(Tok, diag::err_expected_class_name);
989  return true;
990  }
991 
992  IdentifierInfo *Id = Tok.getIdentifierInfo();
993  SourceLocation IdLoc = ConsumeToken();
994 
995  if (Tok.is(tok::less)) {
996  // It looks the user intended to write a template-id here, but the
997  // template-name was wrong. Try to fix that.
999  TemplateTy Template;
1000  if (!Actions.DiagnoseUnknownTemplateName(*Id, IdLoc, getCurScope(),
1001  &SS, Template, TNK)) {
1002  Diag(IdLoc, diag::err_unknown_template_name)
1003  << Id;
1004  }
1005 
1006  if (!Template) {
1007  TemplateArgList TemplateArgs;
1008  SourceLocation LAngleLoc, RAngleLoc;
1009  ParseTemplateIdAfterTemplateName(TemplateTy(), IdLoc, SS,
1010  true, LAngleLoc, TemplateArgs, RAngleLoc);
1011  return true;
1012  }
1013 
1014  // Form the template name
1016  TemplateName.setIdentifier(Id, IdLoc);
1017 
1018  // Parse the full template-id, then turn it into a type.
1019  if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(),
1020  TemplateName, true))
1021  return true;
1022  if (TNK == TNK_Dependent_template_name)
1023  AnnotateTemplateIdTokenAsType();
1024 
1025  // If we didn't end up with a typename token, there's nothing more we
1026  // can do.
1027  if (Tok.isNot(tok::annot_typename))
1028  return true;
1029 
1030  // Retrieve the type from the annotation token, consume that token, and
1031  // return.
1032  EndLocation = Tok.getAnnotationEndLoc();
1033  ParsedType Type = getTypeAnnotation(Tok);
1034  ConsumeToken();
1035  return Type;
1036  }
1037 
1038  // We have an identifier; check whether it is actually a type.
1039  IdentifierInfo *CorrectedII = nullptr;
1040  ParsedType Type = Actions.getTypeName(*Id, IdLoc, getCurScope(), &SS, true,
1041  false, ParsedType(),
1042  /*IsCtorOrDtorName=*/false,
1043  /*NonTrivialTypeSourceInfo=*/true,
1044  &CorrectedII);
1045  if (!Type) {
1046  Diag(IdLoc, diag::err_expected_class_name);
1047  return true;
1048  }
1049 
1050  // Consume the identifier.
1051  EndLocation = IdLoc;
1052 
1053  // Fake up a Declarator to use with ActOnTypeName.
1054  DeclSpec DS(AttrFactory);
1055  DS.SetRangeStart(IdLoc);
1056  DS.SetRangeEnd(EndLocation);
1057  DS.getTypeSpecScope() = SS;
1058 
1059  const char *PrevSpec = nullptr;
1060  unsigned DiagID;
1061  DS.SetTypeSpecType(TST_typename, IdLoc, PrevSpec, DiagID, Type,
1062  Actions.getASTContext().getPrintingPolicy());
1063 
1064  Declarator DeclaratorInfo(DS, Declarator::TypeNameContext);
1065  return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
1066 }
1067 
1068 void Parser::ParseMicrosoftInheritanceClassAttributes(ParsedAttributes &attrs) {
1069  while (Tok.isOneOf(tok::kw___single_inheritance,
1070  tok::kw___multiple_inheritance,
1071  tok::kw___virtual_inheritance)) {
1072  IdentifierInfo *AttrName = Tok.getIdentifierInfo();
1073  SourceLocation AttrNameLoc = ConsumeToken();
1074  attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
1076  }
1077 }
1078 
1079 /// Determine whether the following tokens are valid after a type-specifier
1080 /// which could be a standalone declaration. This will conservatively return
1081 /// true if there's any doubt, and is appropriate for insert-';' fixits.
1082 bool Parser::isValidAfterTypeSpecifier(bool CouldBeBitfield) {
1083  // This switch enumerates the valid "follow" set for type-specifiers.
1084  switch (Tok.getKind()) {
1085  default: break;
1086  case tok::semi: // struct foo {...} ;
1087  case tok::star: // struct foo {...} * P;
1088  case tok::amp: // struct foo {...} & R = ...
1089  case tok::ampamp: // struct foo {...} && R = ...
1090  case tok::identifier: // struct foo {...} V ;
1091  case tok::r_paren: //(struct foo {...} ) {4}
1092  case tok::annot_cxxscope: // struct foo {...} a:: b;
1093  case tok::annot_typename: // struct foo {...} a ::b;
1094  case tok::annot_template_id: // struct foo {...} a<int> ::b;
1095  case tok::l_paren: // struct foo {...} ( x);
1096  case tok::comma: // __builtin_offsetof(struct foo{...} ,
1097  case tok::kw_operator: // struct foo operator ++() {...}
1098  case tok::kw___declspec: // struct foo {...} __declspec(...)
1099  case tok::l_square: // void f(struct f [ 3])
1100  case tok::ellipsis: // void f(struct f ... [Ns])
1101  // FIXME: we should emit semantic diagnostic when declaration
1102  // attribute is in type attribute position.
1103  case tok::kw___attribute: // struct foo __attribute__((used)) x;
1104  return true;
1105  case tok::colon:
1106  return CouldBeBitfield; // enum E { ... } : 2;
1107  // Type qualifiers
1108  case tok::kw_const: // struct foo {...} const x;
1109  case tok::kw_volatile: // struct foo {...} volatile x;
1110  case tok::kw_restrict: // struct foo {...} restrict x;
1111  case tok::kw__Atomic: // struct foo {...} _Atomic x;
1112  case tok::kw___unaligned: // struct foo {...} __unaligned *x;
1113  // Function specifiers
1114  // Note, no 'explicit'. An explicit function must be either a conversion
1115  // operator or a constructor. Either way, it can't have a return type.
1116  case tok::kw_inline: // struct foo inline f();
1117  case tok::kw_virtual: // struct foo virtual f();
1118  case tok::kw_friend: // struct foo friend f();
1119  // Storage-class specifiers
1120  case tok::kw_static: // struct foo {...} static x;
1121  case tok::kw_extern: // struct foo {...} extern x;
1122  case tok::kw_typedef: // struct foo {...} typedef x;
1123  case tok::kw_register: // struct foo {...} register x;
1124  case tok::kw_auto: // struct foo {...} auto x;
1125  case tok::kw_mutable: // struct foo {...} mutable x;
1126  case tok::kw_thread_local: // struct foo {...} thread_local x;
1127  case tok::kw_constexpr: // struct foo {...} constexpr x;
1128  // As shown above, type qualifiers and storage class specifiers absolutely
1129  // can occur after class specifiers according to the grammar. However,
1130  // almost no one actually writes code like this. If we see one of these,
1131  // it is much more likely that someone missed a semi colon and the
1132  // type/storage class specifier we're seeing is part of the *next*
1133  // intended declaration, as in:
1134  //
1135  // struct foo { ... }
1136  // typedef int X;
1137  //
1138  // We'd really like to emit a missing semicolon error instead of emitting
1139  // an error on the 'int' saying that you can't have two type specifiers in
1140  // the same declaration of X. Because of this, we look ahead past this
1141  // token to see if it's a type specifier. If so, we know the code is
1142  // otherwise invalid, so we can produce the expected semi error.
1143  if (!isKnownToBeTypeSpecifier(NextToken()))
1144  return true;
1145  break;
1146  case tok::r_brace: // struct bar { struct foo {...} }
1147  // Missing ';' at end of struct is accepted as an extension in C mode.
1148  if (!getLangOpts().CPlusPlus)
1149  return true;
1150  break;
1151  case tok::greater:
1152  // template<class T = class X>
1153  return getLangOpts().CPlusPlus;
1154  }
1155  return false;
1156 }
1157 
1158 /// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or
1159 /// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which
1160 /// until we reach the start of a definition or see a token that
1161 /// cannot start a definition.
1162 ///
1163 /// class-specifier: [C++ class]
1164 /// class-head '{' member-specification[opt] '}'
1165 /// class-head '{' member-specification[opt] '}' attributes[opt]
1166 /// class-head:
1167 /// class-key identifier[opt] base-clause[opt]
1168 /// class-key nested-name-specifier identifier base-clause[opt]
1169 /// class-key nested-name-specifier[opt] simple-template-id
1170 /// base-clause[opt]
1171 /// [GNU] class-key attributes[opt] identifier[opt] base-clause[opt]
1172 /// [GNU] class-key attributes[opt] nested-name-specifier
1173 /// identifier base-clause[opt]
1174 /// [GNU] class-key attributes[opt] nested-name-specifier[opt]
1175 /// simple-template-id base-clause[opt]
1176 /// class-key:
1177 /// 'class'
1178 /// 'struct'
1179 /// 'union'
1180 ///
1181 /// elaborated-type-specifier: [C++ dcl.type.elab]
1182 /// class-key ::[opt] nested-name-specifier[opt] identifier
1183 /// class-key ::[opt] nested-name-specifier[opt] 'template'[opt]
1184 /// simple-template-id
1185 ///
1186 /// Note that the C++ class-specifier and elaborated-type-specifier,
1187 /// together, subsume the C99 struct-or-union-specifier:
1188 ///
1189 /// struct-or-union-specifier: [C99 6.7.2.1]
1190 /// struct-or-union identifier[opt] '{' struct-contents '}'
1191 /// struct-or-union identifier
1192 /// [GNU] struct-or-union attributes[opt] identifier[opt] '{' struct-contents
1193 /// '}' attributes[opt]
1194 /// [GNU] struct-or-union attributes[opt] identifier
1195 /// struct-or-union:
1196 /// 'struct'
1197 /// 'union'
1198 void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind,
1199  SourceLocation StartLoc, DeclSpec &DS,
1200  const ParsedTemplateInfo &TemplateInfo,
1201  AccessSpecifier AS,
1202  bool EnteringContext, DeclSpecContext DSC,
1203  ParsedAttributesWithRange &Attributes) {
1205  if (TagTokKind == tok::kw_struct)
1206  TagType = DeclSpec::TST_struct;
1207  else if (TagTokKind == tok::kw___interface)
1208  TagType = DeclSpec::TST_interface;
1209  else if (TagTokKind == tok::kw_class)
1210  TagType = DeclSpec::TST_class;
1211  else {
1212  assert(TagTokKind == tok::kw_union && "Not a class specifier");
1213  TagType = DeclSpec::TST_union;
1214  }
1215 
1216  if (Tok.is(tok::code_completion)) {
1217  // Code completion for a struct, class, or union name.
1218  Actions.CodeCompleteTag(getCurScope(), TagType);
1219  return cutOffParsing();
1220  }
1221 
1222  // C++03 [temp.explicit] 14.7.2/8:
1223  // The usual access checking rules do not apply to names used to specify
1224  // explicit instantiations.
1225  //
1226  // As an extension we do not perform access checking on the names used to
1227  // specify explicit specializations either. This is important to allow
1228  // specializing traits classes for private types.
1229  //
1230  // Note that we don't suppress if this turns out to be an elaborated
1231  // type specifier.
1232  bool shouldDelayDiagsInTag =
1233  (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation ||
1234  TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization);
1235  SuppressAccessChecks diagsFromTag(*this, shouldDelayDiagsInTag);
1236 
1237  ParsedAttributesWithRange attrs(AttrFactory);
1238  // If attributes exist after tag, parse them.
1239  MaybeParseGNUAttributes(attrs);
1240  MaybeParseMicrosoftDeclSpecs(attrs);
1241 
1242  // Parse inheritance specifiers.
1243  if (Tok.isOneOf(tok::kw___single_inheritance,
1244  tok::kw___multiple_inheritance,
1245  tok::kw___virtual_inheritance))
1246  ParseMicrosoftInheritanceClassAttributes(attrs);
1247 
1248  // If C++0x attributes exist here, parse them.
1249  // FIXME: Are we consistent with the ordering of parsing of different
1250  // styles of attributes?
1251  MaybeParseCXX11Attributes(attrs);
1252 
1253  // Source location used by FIXIT to insert misplaced
1254  // C++11 attributes
1255  SourceLocation AttrFixitLoc = Tok.getLocation();
1256 
1257  if (TagType == DeclSpec::TST_struct &&
1258  Tok.isNot(tok::identifier) &&
1259  !Tok.isAnnotation() &&
1260  Tok.getIdentifierInfo() &&
1261  Tok.isOneOf(tok::kw___is_abstract,
1262  tok::kw___is_arithmetic,
1263  tok::kw___is_array,
1264  tok::kw___is_base_of,
1265  tok::kw___is_class,
1266  tok::kw___is_complete_type,
1267  tok::kw___is_compound,
1268  tok::kw___is_const,
1269  tok::kw___is_constructible,
1270  tok::kw___is_convertible,
1271  tok::kw___is_convertible_to,
1272  tok::kw___is_destructible,
1273  tok::kw___is_empty,
1274  tok::kw___is_enum,
1275  tok::kw___is_floating_point,
1276  tok::kw___is_final,
1277  tok::kw___is_function,
1278  tok::kw___is_fundamental,
1279  tok::kw___is_integral,
1280  tok::kw___is_interface_class,
1281  tok::kw___is_literal,
1282  tok::kw___is_lvalue_expr,
1283  tok::kw___is_lvalue_reference,
1284  tok::kw___is_member_function_pointer,
1285  tok::kw___is_member_object_pointer,
1286  tok::kw___is_member_pointer,
1287  tok::kw___is_nothrow_assignable,
1288  tok::kw___is_nothrow_constructible,
1289  tok::kw___is_nothrow_destructible,
1290  tok::kw___is_object,
1291  tok::kw___is_pod,
1292  tok::kw___is_pointer,
1293  tok::kw___is_polymorphic,
1294  tok::kw___is_reference,
1295  tok::kw___is_rvalue_expr,
1296  tok::kw___is_rvalue_reference,
1297  tok::kw___is_same,
1298  tok::kw___is_scalar,
1299  tok::kw___is_sealed,
1300  tok::kw___is_signed,
1301  tok::kw___is_standard_layout,
1302  tok::kw___is_trivial,
1303  tok::kw___is_trivially_assignable,
1304  tok::kw___is_trivially_constructible,
1305  tok::kw___is_trivially_copyable,
1306  tok::kw___is_union,
1307  tok::kw___is_unsigned,
1308  tok::kw___is_void,
1309  tok::kw___is_volatile))
1310  // GNU libstdc++ 4.2 and libc++ use certain intrinsic names as the
1311  // name of struct templates, but some are keywords in GCC >= 4.3
1312  // and Clang. Therefore, when we see the token sequence "struct
1313  // X", make X into a normal identifier rather than a keyword, to
1314  // allow libstdc++ 4.2 and libc++ to work properly.
1315  TryKeywordIdentFallback(true);
1316 
1317  struct PreserveAtomicIdentifierInfoRAII {
1318  PreserveAtomicIdentifierInfoRAII(Token &Tok, bool Enabled)
1319  : AtomicII(nullptr) {
1320  if (!Enabled)
1321  return;
1322  assert(Tok.is(tok::kw__Atomic));
1323  AtomicII = Tok.getIdentifierInfo();
1324  AtomicII->revertTokenIDToIdentifier();
1325  Tok.setKind(tok::identifier);
1326  }
1327  ~PreserveAtomicIdentifierInfoRAII() {
1328  if (!AtomicII)
1329  return;
1330  AtomicII->revertIdentifierToTokenID(tok::kw__Atomic);
1331  }
1332  IdentifierInfo *AtomicII;
1333  };
1334 
1335  // HACK: MSVC doesn't consider _Atomic to be a keyword and its STL
1336  // implementation for VS2013 uses _Atomic as an identifier for one of the
1337  // classes in <atomic>. When we are parsing 'struct _Atomic', don't consider
1338  // '_Atomic' to be a keyword. We are careful to undo this so that clang can
1339  // use '_Atomic' in its own header files.
1340  bool ShouldChangeAtomicToIdentifier = getLangOpts().MSVCCompat &&
1341  Tok.is(tok::kw__Atomic) &&
1342  TagType == DeclSpec::TST_struct;
1343  PreserveAtomicIdentifierInfoRAII AtomicTokenGuard(
1344  Tok, ShouldChangeAtomicToIdentifier);
1345 
1346  // Parse the (optional) nested-name-specifier.
1347  CXXScopeSpec &SS = DS.getTypeSpecScope();
1348  if (getLangOpts().CPlusPlus) {
1349  // "FOO : BAR" is not a potential typo for "FOO::BAR". In this context it
1350  // is a base-specifier-list.
1352 
1353  CXXScopeSpec Spec;
1354  bool HasValidSpec = true;
1355  if (ParseOptionalCXXScopeSpecifier(Spec, ParsedType(), EnteringContext)) {
1356  DS.SetTypeSpecError();
1357  HasValidSpec = false;
1358  }
1359  if (Spec.isSet())
1360  if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) {
1361  Diag(Tok, diag::err_expected) << tok::identifier;
1362  HasValidSpec = false;
1363  }
1364  if (HasValidSpec)
1365  SS = Spec;
1366  }
1367 
1368  TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams;
1369 
1370  // Parse the (optional) class name or simple-template-id.
1371  IdentifierInfo *Name = nullptr;
1372  SourceLocation NameLoc;
1373  TemplateIdAnnotation *TemplateId = nullptr;
1374  if (Tok.is(tok::identifier)) {
1375  Name = Tok.getIdentifierInfo();
1376  NameLoc = ConsumeToken();
1377 
1378  if (Tok.is(tok::less) && getLangOpts().CPlusPlus) {
1379  // The name was supposed to refer to a template, but didn't.
1380  // Eat the template argument list and try to continue parsing this as
1381  // a class (or template thereof).
1382  TemplateArgList TemplateArgs;
1383  SourceLocation LAngleLoc, RAngleLoc;
1384  if (ParseTemplateIdAfterTemplateName(TemplateTy(), NameLoc, SS,
1385  true, LAngleLoc,
1386  TemplateArgs, RAngleLoc)) {
1387  // We couldn't parse the template argument list at all, so don't
1388  // try to give any location information for the list.
1389  LAngleLoc = RAngleLoc = SourceLocation();
1390  }
1391 
1392  Diag(NameLoc, diag::err_explicit_spec_non_template)
1393  << (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation)
1394  << TagTokKind << Name << SourceRange(LAngleLoc, RAngleLoc);
1395 
1396  // Strip off the last template parameter list if it was empty, since
1397  // we've removed its template argument list.
1398  if (TemplateParams && TemplateInfo.LastParameterListWasEmpty) {
1399  if (TemplateParams && TemplateParams->size() > 1) {
1400  TemplateParams->pop_back();
1401  } else {
1402  TemplateParams = nullptr;
1403  const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind
1404  = ParsedTemplateInfo::NonTemplate;
1405  }
1406  } else if (TemplateInfo.Kind
1407  == ParsedTemplateInfo::ExplicitInstantiation) {
1408  // Pretend this is just a forward declaration.
1409  TemplateParams = nullptr;
1410  const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind
1411  = ParsedTemplateInfo::NonTemplate;
1412  const_cast<ParsedTemplateInfo&>(TemplateInfo).TemplateLoc
1413  = SourceLocation();
1414  const_cast<ParsedTemplateInfo&>(TemplateInfo).ExternLoc
1415  = SourceLocation();
1416  }
1417  }
1418  } else if (Tok.is(tok::annot_template_id)) {
1419  TemplateId = takeTemplateIdAnnotation(Tok);
1420  NameLoc = ConsumeToken();
1421 
1422  if (TemplateId->Kind != TNK_Type_template &&
1423  TemplateId->Kind != TNK_Dependent_template_name) {
1424  // The template-name in the simple-template-id refers to
1425  // something other than a class template. Give an appropriate
1426  // error message and skip to the ';'.
1427  SourceRange Range(NameLoc);
1428  if (SS.isNotEmpty())
1429  Range.setBegin(SS.getBeginLoc());
1430 
1431  // FIXME: Name may be null here.
1432  Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template)
1433  << TemplateId->Name << static_cast<int>(TemplateId->Kind) << Range;
1434 
1435  DS.SetTypeSpecError();
1436  SkipUntil(tok::semi, StopBeforeMatch);
1437  return;
1438  }
1439  }
1440 
1441  // There are four options here.
1442  // - If we are in a trailing return type, this is always just a reference,
1443  // and we must not try to parse a definition. For instance,
1444  // [] () -> struct S { };
1445  // does not define a type.
1446  // - If we have 'struct foo {...', 'struct foo :...',
1447  // 'struct foo final :' or 'struct foo final {', then this is a definition.
1448  // - If we have 'struct foo;', then this is either a forward declaration
1449  // or a friend declaration, which have to be treated differently.
1450  // - Otherwise we have something like 'struct foo xyz', a reference.
1451  //
1452  // We also detect these erroneous cases to provide better diagnostic for
1453  // C++11 attributes parsing.
1454  // - attributes follow class name:
1455  // struct foo [[]] {};
1456  // - attributes appear before or after 'final':
1457  // struct foo [[]] final [[]] {};
1458  //
1459  // However, in type-specifier-seq's, things look like declarations but are
1460  // just references, e.g.
1461  // new struct s;
1462  // or
1463  // &T::operator struct s;
1464  // For these, DSC is DSC_type_specifier or DSC_alias_declaration.
1465 
1466  // If there are attributes after class name, parse them.
1467  MaybeParseCXX11Attributes(Attributes);
1468 
1469  const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
1470  Sema::TagUseKind TUK;
1471  if (DSC == DSC_trailing)
1472  TUK = Sema::TUK_Reference;
1473  else if (Tok.is(tok::l_brace) ||
1474  (getLangOpts().CPlusPlus && Tok.is(tok::colon)) ||
1475  (isCXX11FinalKeyword() &&
1476  (NextToken().is(tok::l_brace) || NextToken().is(tok::colon)))) {
1477  if (DS.isFriendSpecified()) {
1478  // C++ [class.friend]p2:
1479  // A class shall not be defined in a friend declaration.
1480  Diag(Tok.getLocation(), diag::err_friend_decl_defines_type)
1481  << SourceRange(DS.getFriendSpecLoc());
1482 
1483  // Skip everything up to the semicolon, so that this looks like a proper
1484  // friend class (or template thereof) declaration.
1485  SkipUntil(tok::semi, StopBeforeMatch);
1486  TUK = Sema::TUK_Friend;
1487  } else {
1488  // Okay, this is a class definition.
1489  TUK = Sema::TUK_Definition;
1490  }
1491  } else if (isCXX11FinalKeyword() && (NextToken().is(tok::l_square) ||
1492  NextToken().is(tok::kw_alignas))) {
1493  // We can't tell if this is a definition or reference
1494  // until we skipped the 'final' and C++11 attribute specifiers.
1495  TentativeParsingAction PA(*this);
1496 
1497  // Skip the 'final' keyword.
1498  ConsumeToken();
1499 
1500  // Skip C++11 attribute specifiers.
1501  while (true) {
1502  if (Tok.is(tok::l_square) && NextToken().is(tok::l_square)) {
1503  ConsumeBracket();
1504  if (!SkipUntil(tok::r_square, StopAtSemi))
1505  break;
1506  } else if (Tok.is(tok::kw_alignas) && NextToken().is(tok::l_paren)) {
1507  ConsumeToken();
1508  ConsumeParen();
1509  if (!SkipUntil(tok::r_paren, StopAtSemi))
1510  break;
1511  } else {
1512  break;
1513  }
1514  }
1515 
1516  if (Tok.isOneOf(tok::l_brace, tok::colon))
1517  TUK = Sema::TUK_Definition;
1518  else
1519  TUK = Sema::TUK_Reference;
1520 
1521  PA.Revert();
1522  } else if (!isTypeSpecifier(DSC) &&
1523  (Tok.is(tok::semi) ||
1524  (Tok.isAtStartOfLine() && !isValidAfterTypeSpecifier(false)))) {
1526  if (Tok.isNot(tok::semi)) {
1527  const PrintingPolicy &PPol = Actions.getASTContext().getPrintingPolicy();
1528  // A semicolon was missing after this declaration. Diagnose and recover.
1529  ExpectAndConsume(tok::semi, diag::err_expected_after,
1530  DeclSpec::getSpecifierName(TagType, PPol));
1531  PP.EnterToken(Tok);
1532  Tok.setKind(tok::semi);
1533  }
1534  } else
1535  TUK = Sema::TUK_Reference;
1536 
1537  // Forbid misplaced attributes. In cases of a reference, we pass attributes
1538  // to caller to handle.
1539  if (TUK != Sema::TUK_Reference) {
1540  // If this is not a reference, then the only possible
1541  // valid place for C++11 attributes to appear here
1542  // is between class-key and class-name. If there are
1543  // any attributes after class-name, we try a fixit to move
1544  // them to the right place.
1545  SourceRange AttrRange = Attributes.Range;
1546  if (AttrRange.isValid()) {
1547  Diag(AttrRange.getBegin(), diag::err_attributes_not_allowed)
1548  << AttrRange
1549  << FixItHint::CreateInsertionFromRange(AttrFixitLoc,
1550  CharSourceRange(AttrRange, true))
1551  << FixItHint::CreateRemoval(AttrRange);
1552 
1553  // Recover by adding misplaced attributes to the attribute list
1554  // of the class so they can be applied on the class later.
1555  attrs.takeAllFrom(Attributes);
1556  }
1557  }
1558 
1559  // If this is an elaborated type specifier, and we delayed
1560  // diagnostics before, just merge them into the current pool.
1561  if (shouldDelayDiagsInTag) {
1562  diagsFromTag.done();
1563  if (TUK == Sema::TUK_Reference)
1564  diagsFromTag.redelay();
1565  }
1566 
1567  if (!Name && !TemplateId && (DS.getTypeSpecType() == DeclSpec::TST_error ||
1568  TUK != Sema::TUK_Definition)) {
1569  if (DS.getTypeSpecType() != DeclSpec::TST_error) {
1570  // We have a declaration or reference to an anonymous class.
1571  Diag(StartLoc, diag::err_anon_type_definition)
1572  << DeclSpec::getSpecifierName(TagType, Policy);
1573  }
1574 
1575  // If we are parsing a definition and stop at a base-clause, continue on
1576  // until the semicolon. Continuing from the comma will just trick us into
1577  // thinking we are seeing a variable declaration.
1578  if (TUK == Sema::TUK_Definition && Tok.is(tok::colon))
1579  SkipUntil(tok::semi, StopBeforeMatch);
1580  else
1581  SkipUntil(tok::comma, StopAtSemi);
1582  return;
1583  }
1584 
1585  // Create the tag portion of the class or class template.
1586  DeclResult TagOrTempResult = true; // invalid
1587  TypeResult TypeResult = true; // invalid
1588 
1589  bool Owned = false;
1590  Sema::SkipBodyInfo SkipBody;
1591  if (TemplateId) {
1592  // Explicit specialization, class template partial specialization,
1593  // or explicit instantiation.
1594  ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
1595  TemplateId->NumArgs);
1596  if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation &&
1597  TUK == Sema::TUK_Declaration) {
1598  // This is an explicit instantiation of a class template.
1599  ProhibitAttributes(attrs);
1600 
1601  TagOrTempResult
1603  TemplateInfo.ExternLoc,
1604  TemplateInfo.TemplateLoc,
1605  TagType,
1606  StartLoc,
1607  SS,
1608  TemplateId->Template,
1609  TemplateId->TemplateNameLoc,
1610  TemplateId->LAngleLoc,
1611  TemplateArgsPtr,
1612  TemplateId->RAngleLoc,
1613  attrs.getList());
1614 
1615  // Friend template-ids are treated as references unless
1616  // they have template headers, in which case they're ill-formed
1617  // (FIXME: "template <class T> friend class A<T>::B<int>;").
1618  // We diagnose this error in ActOnClassTemplateSpecialization.
1619  } else if (TUK == Sema::TUK_Reference ||
1620  (TUK == Sema::TUK_Friend &&
1621  TemplateInfo.Kind == ParsedTemplateInfo::NonTemplate)) {
1622  ProhibitAttributes(attrs);
1623  TypeResult = Actions.ActOnTagTemplateIdType(TUK, TagType, StartLoc,
1624  TemplateId->SS,
1625  TemplateId->TemplateKWLoc,
1626  TemplateId->Template,
1627  TemplateId->TemplateNameLoc,
1628  TemplateId->LAngleLoc,
1629  TemplateArgsPtr,
1630  TemplateId->RAngleLoc);
1631  } else {
1632  // This is an explicit specialization or a class template
1633  // partial specialization.
1634  TemplateParameterLists FakedParamLists;
1635  if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
1636  // This looks like an explicit instantiation, because we have
1637  // something like
1638  //
1639  // template class Foo<X>
1640  //
1641  // but it actually has a definition. Most likely, this was
1642  // meant to be an explicit specialization, but the user forgot
1643  // the '<>' after 'template'.
1644  // It this is friend declaration however, since it cannot have a
1645  // template header, it is most likely that the user meant to
1646  // remove the 'template' keyword.
1647  assert((TUK == Sema::TUK_Definition || TUK == Sema::TUK_Friend) &&
1648  "Expected a definition here");
1649 
1650  if (TUK == Sema::TUK_Friend) {
1651  Diag(DS.getFriendSpecLoc(), diag::err_friend_explicit_instantiation);
1652  TemplateParams = nullptr;
1653  } else {
1654  SourceLocation LAngleLoc =
1655  PP.getLocForEndOfToken(TemplateInfo.TemplateLoc);
1656  Diag(TemplateId->TemplateNameLoc,
1657  diag::err_explicit_instantiation_with_definition)
1658  << SourceRange(TemplateInfo.TemplateLoc)
1659  << FixItHint::CreateInsertion(LAngleLoc, "<>");
1660 
1661  // Create a fake template parameter list that contains only
1662  // "template<>", so that we treat this construct as a class
1663  // template specialization.
1664  FakedParamLists.push_back(Actions.ActOnTemplateParameterList(
1665  0, SourceLocation(), TemplateInfo.TemplateLoc, LAngleLoc, None,
1666  LAngleLoc));
1667  TemplateParams = &FakedParamLists;
1668  }
1669  }
1670 
1671  // Build the class template specialization.
1672  TagOrTempResult = Actions.ActOnClassTemplateSpecialization(
1673  getCurScope(), TagType, TUK, StartLoc, DS.getModulePrivateSpecLoc(),
1674  *TemplateId, attrs.getList(),
1675  MultiTemplateParamsArg(TemplateParams ? &(*TemplateParams)[0]
1676  : nullptr,
1677  TemplateParams ? TemplateParams->size() : 0),
1678  &SkipBody);
1679  }
1680  } else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation &&
1681  TUK == Sema::TUK_Declaration) {
1682  // Explicit instantiation of a member of a class template
1683  // specialization, e.g.,
1684  //
1685  // template struct Outer<int>::Inner;
1686  //
1687  ProhibitAttributes(attrs);
1688 
1689  TagOrTempResult
1691  TemplateInfo.ExternLoc,
1692  TemplateInfo.TemplateLoc,
1693  TagType, StartLoc, SS, Name,
1694  NameLoc, attrs.getList());
1695  } else if (TUK == Sema::TUK_Friend &&
1696  TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) {
1697  ProhibitAttributes(attrs);
1698 
1699  TagOrTempResult =
1701  TagType, StartLoc, SS,
1702  Name, NameLoc, attrs.getList(),
1704  TemplateParams? &(*TemplateParams)[0]
1705  : nullptr,
1706  TemplateParams? TemplateParams->size() : 0));
1707  } else {
1708  if (TUK != Sema::TUK_Declaration && TUK != Sema::TUK_Definition)
1709  ProhibitAttributes(attrs);
1710 
1711  if (TUK == Sema::TUK_Definition &&
1712  TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
1713  // If the declarator-id is not a template-id, issue a diagnostic and
1714  // recover by ignoring the 'template' keyword.
1715  Diag(Tok, diag::err_template_defn_explicit_instantiation)
1716  << 1 << FixItHint::CreateRemoval(TemplateInfo.TemplateLoc);
1717  TemplateParams = nullptr;
1718  }
1719 
1720  bool IsDependent = false;
1721 
1722  // Don't pass down template parameter lists if this is just a tag
1723  // reference. For example, we don't need the template parameters here:
1724  // template <class T> class A *makeA(T t);
1725  MultiTemplateParamsArg TParams;
1726  if (TUK != Sema::TUK_Reference && TemplateParams)
1727  TParams =
1728  MultiTemplateParamsArg(&(*TemplateParams)[0], TemplateParams->size());
1729 
1730  handleDeclspecAlignBeforeClassKey(attrs, DS, TUK);
1731 
1732  // Declaration or definition of a class type
1733  TagOrTempResult = Actions.ActOnTag(getCurScope(), TagType, TUK, StartLoc,
1734  SS, Name, NameLoc, attrs.getList(), AS,
1736  TParams, Owned, IsDependent,
1737  SourceLocation(), false,
1739  DSC == DSC_type_specifier,
1740  &SkipBody);
1741 
1742  // If ActOnTag said the type was dependent, try again with the
1743  // less common call.
1744  if (IsDependent) {
1745  assert(TUK == Sema::TUK_Reference || TUK == Sema::TUK_Friend);
1746  TypeResult = Actions.ActOnDependentTag(getCurScope(), TagType, TUK,
1747  SS, Name, StartLoc, NameLoc);
1748  }
1749  }
1750 
1751  // If there is a body, parse it and inform the actions module.
1752  if (TUK == Sema::TUK_Definition) {
1753  assert(Tok.is(tok::l_brace) ||
1754  (getLangOpts().CPlusPlus && Tok.is(tok::colon)) ||
1755  isCXX11FinalKeyword());
1756  if (SkipBody.ShouldSkip)
1757  SkipCXXMemberSpecification(StartLoc, AttrFixitLoc, TagType,
1758  TagOrTempResult.get());
1759  else if (getLangOpts().CPlusPlus)
1760  ParseCXXMemberSpecification(StartLoc, AttrFixitLoc, attrs, TagType,
1761  TagOrTempResult.get());
1762  else
1763  ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get());
1764  }
1765 
1766  const char *PrevSpec = nullptr;
1767  unsigned DiagID;
1768  bool Result;
1769  if (!TypeResult.isInvalid()) {
1770  Result = DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc,
1771  NameLoc.isValid() ? NameLoc : StartLoc,
1772  PrevSpec, DiagID, TypeResult.get(), Policy);
1773  } else if (!TagOrTempResult.isInvalid()) {
1774  Result = DS.SetTypeSpecType(TagType, StartLoc,
1775  NameLoc.isValid() ? NameLoc : StartLoc,
1776  PrevSpec, DiagID, TagOrTempResult.get(), Owned,
1777  Policy);
1778  } else {
1779  DS.SetTypeSpecError();
1780  return;
1781  }
1782 
1783  if (Result)
1784  Diag(StartLoc, DiagID) << PrevSpec;
1785 
1786  // At this point, we've successfully parsed a class-specifier in 'definition'
1787  // form (e.g. "struct foo { int x; }". While we could just return here, we're
1788  // going to look at what comes after it to improve error recovery. If an
1789  // impossible token occurs next, we assume that the programmer forgot a ; at
1790  // the end of the declaration and recover that way.
1791  //
1792  // Also enforce C++ [temp]p3:
1793  // In a template-declaration which defines a class, no declarator
1794  // is permitted.
1795  //
1796  // After a type-specifier, we don't expect a semicolon. This only happens in
1797  // C, since definitions are not permitted in this context in C++.
1798  if (TUK == Sema::TUK_Definition &&
1799  (getLangOpts().CPlusPlus || !isTypeSpecifier(DSC)) &&
1800  (TemplateInfo.Kind || !isValidAfterTypeSpecifier(false))) {
1801  if (Tok.isNot(tok::semi)) {
1802  const PrintingPolicy &PPol = Actions.getASTContext().getPrintingPolicy();
1803  ExpectAndConsume(tok::semi, diag::err_expected_after,
1804  DeclSpec::getSpecifierName(TagType, PPol));
1805  // Push this token back into the preprocessor and change our current token
1806  // to ';' so that the rest of the code recovers as though there were an
1807  // ';' after the definition.
1808  PP.EnterToken(Tok);
1809  Tok.setKind(tok::semi);
1810  }
1811  }
1812 }
1813 
1814 /// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived].
1815 ///
1816 /// base-clause : [C++ class.derived]
1817 /// ':' base-specifier-list
1818 /// base-specifier-list:
1819 /// base-specifier '...'[opt]
1820 /// base-specifier-list ',' base-specifier '...'[opt]
1821 void Parser::ParseBaseClause(Decl *ClassDecl) {
1822  assert(Tok.is(tok::colon) && "Not a base clause");
1823  ConsumeToken();
1824 
1825  // Build up an array of parsed base specifiers.
1827 
1828  while (true) {
1829  // Parse a base-specifier.
1830  BaseResult Result = ParseBaseSpecifier(ClassDecl);
1831  if (Result.isInvalid()) {
1832  // Skip the rest of this base specifier, up until the comma or
1833  // opening brace.
1834  SkipUntil(tok::comma, tok::l_brace, StopAtSemi | StopBeforeMatch);
1835  } else {
1836  // Add this to our array of base specifiers.
1837  BaseInfo.push_back(Result.get());
1838  }
1839 
1840  // If the next token is a comma, consume it and keep reading
1841  // base-specifiers.
1842  if (!TryConsumeToken(tok::comma))
1843  break;
1844  }
1845 
1846  // Attach the base specifiers
1847  Actions.ActOnBaseSpecifiers(ClassDecl, BaseInfo);
1848 }
1849 
1850 /// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is
1851 /// one entry in the base class list of a class specifier, for example:
1852 /// class foo : public bar, virtual private baz {
1853 /// 'public bar' and 'virtual private baz' are each base-specifiers.
1854 ///
1855 /// base-specifier: [C++ class.derived]
1856 /// attribute-specifier-seq[opt] base-type-specifier
1857 /// attribute-specifier-seq[opt] 'virtual' access-specifier[opt]
1858 /// base-type-specifier
1859 /// attribute-specifier-seq[opt] access-specifier 'virtual'[opt]
1860 /// base-type-specifier
1861 BaseResult Parser::ParseBaseSpecifier(Decl *ClassDecl) {
1862  bool IsVirtual = false;
1863  SourceLocation StartLoc = Tok.getLocation();
1864 
1865  ParsedAttributesWithRange Attributes(AttrFactory);
1866  MaybeParseCXX11Attributes(Attributes);
1867 
1868  // Parse the 'virtual' keyword.
1869  if (TryConsumeToken(tok::kw_virtual))
1870  IsVirtual = true;
1871 
1872  CheckMisplacedCXX11Attribute(Attributes, StartLoc);
1873 
1874  // Parse an (optional) access specifier.
1875  AccessSpecifier Access = getAccessSpecifierIfPresent();
1876  if (Access != AS_none)
1877  ConsumeToken();
1878 
1879  CheckMisplacedCXX11Attribute(Attributes, StartLoc);
1880 
1881  // Parse the 'virtual' keyword (again!), in case it came after the
1882  // access specifier.
1883  if (Tok.is(tok::kw_virtual)) {
1884  SourceLocation VirtualLoc = ConsumeToken();
1885  if (IsVirtual) {
1886  // Complain about duplicate 'virtual'
1887  Diag(VirtualLoc, diag::err_dup_virtual)
1888  << FixItHint::CreateRemoval(VirtualLoc);
1889  }
1890 
1891  IsVirtual = true;
1892  }
1893 
1894  CheckMisplacedCXX11Attribute(Attributes, StartLoc);
1895 
1896  // Parse the class-name.
1897 
1898  // HACK: MSVC doesn't consider _Atomic to be a keyword and its STL
1899  // implementation for VS2013 uses _Atomic as an identifier for one of the
1900  // classes in <atomic>. Treat '_Atomic' to be an identifier when we are
1901  // parsing the class-name for a base specifier.
1902  if (getLangOpts().MSVCCompat && Tok.is(tok::kw__Atomic) &&
1903  NextToken().is(tok::less))
1904  Tok.setKind(tok::identifier);
1905 
1906  SourceLocation EndLocation;
1907  SourceLocation BaseLoc;
1908  TypeResult BaseType = ParseBaseTypeSpecifier(BaseLoc, EndLocation);
1909  if (BaseType.isInvalid())
1910  return true;
1911 
1912  // Parse the optional ellipsis (for a pack expansion). The ellipsis is
1913  // actually part of the base-specifier-list grammar productions, but we
1914  // parse it here for convenience.
1915  SourceLocation EllipsisLoc;
1916  TryConsumeToken(tok::ellipsis, EllipsisLoc);
1917 
1918  // Find the complete source range for the base-specifier.
1919  SourceRange Range(StartLoc, EndLocation);
1920 
1921  // Notify semantic analysis that we have parsed a complete
1922  // base-specifier.
1923  return Actions.ActOnBaseSpecifier(ClassDecl, Range, Attributes, IsVirtual,
1924  Access, BaseType.get(), BaseLoc,
1925  EllipsisLoc);
1926 }
1927 
1928 /// getAccessSpecifierIfPresent - Determine whether the next token is
1929 /// a C++ access-specifier.
1930 ///
1931 /// access-specifier: [C++ class.derived]
1932 /// 'private'
1933 /// 'protected'
1934 /// 'public'
1935 AccessSpecifier Parser::getAccessSpecifierIfPresent() const {
1936  switch (Tok.getKind()) {
1937  default: return AS_none;
1938  case tok::kw_private: return AS_private;
1939  case tok::kw_protected: return AS_protected;
1940  case tok::kw_public: return AS_public;
1941  }
1942 }
1943 
1944 /// \brief If the given declarator has any parts for which parsing has to be
1945 /// delayed, e.g., default arguments or an exception-specification, create a
1946 /// late-parsed method declaration record to handle the parsing at the end of
1947 /// the class definition.
1948 void Parser::HandleMemberFunctionDeclDelays(Declarator& DeclaratorInfo,
1949  Decl *ThisDecl) {
1951  = DeclaratorInfo.getFunctionTypeInfo();
1952  // If there was a late-parsed exception-specification, we'll need a
1953  // late parse
1954  bool NeedLateParse = FTI.getExceptionSpecType() == EST_Unparsed;
1955 
1956  if (!NeedLateParse) {
1957  // Look ahead to see if there are any default args
1958  for (unsigned ParamIdx = 0; ParamIdx < FTI.NumParams; ++ParamIdx) {
1959  auto Param = cast<ParmVarDecl>(FTI.Params[ParamIdx].Param);
1960  if (Param->hasUnparsedDefaultArg()) {
1961  NeedLateParse = true;
1962  break;
1963  }
1964  }
1965  }
1966 
1967  if (NeedLateParse) {
1968  // Push this method onto the stack of late-parsed method
1969  // declarations.
1970  auto LateMethod = new LateParsedMethodDeclaration(this, ThisDecl);
1971  getCurrentClass().LateParsedDeclarations.push_back(LateMethod);
1972  LateMethod->TemplateScope = getCurScope()->isTemplateParamScope();
1973 
1974  // Stash the exception-specification tokens in the late-pased method.
1975  LateMethod->ExceptionSpecTokens = FTI.ExceptionSpecTokens;
1976  FTI.ExceptionSpecTokens = nullptr;
1977 
1978  // Push tokens for each parameter. Those that do not have
1979  // defaults will be NULL.
1980  LateMethod->DefaultArgs.reserve(FTI.NumParams);
1981  for (unsigned ParamIdx = 0; ParamIdx < FTI.NumParams; ++ParamIdx)
1982  LateMethod->DefaultArgs.push_back(LateParsedDefaultArgument(
1983  FTI.Params[ParamIdx].Param, FTI.Params[ParamIdx].DefaultArgTokens));
1984  }
1985 }
1986 
1987 /// isCXX11VirtSpecifier - Determine whether the given token is a C++11
1988 /// virt-specifier.
1989 ///
1990 /// virt-specifier:
1991 /// override
1992 /// final
1993 VirtSpecifiers::Specifier Parser::isCXX11VirtSpecifier(const Token &Tok) const {
1994  if (!getLangOpts().CPlusPlus || Tok.isNot(tok::identifier))
1995  return VirtSpecifiers::VS_None;
1996 
1997  IdentifierInfo *II = Tok.getIdentifierInfo();
1998 
1999  // Initialize the contextual keywords.
2000  if (!Ident_final) {
2001  Ident_final = &PP.getIdentifierTable().get("final");
2002  if (getLangOpts().MicrosoftExt)
2003  Ident_sealed = &PP.getIdentifierTable().get("sealed");
2004  Ident_override = &PP.getIdentifierTable().get("override");
2005  }
2006 
2007  if (II == Ident_override)
2009 
2010  if (II == Ident_sealed)
2012 
2013  if (II == Ident_final)
2014  return VirtSpecifiers::VS_Final;
2015 
2016  return VirtSpecifiers::VS_None;
2017 }
2018 
2019 /// ParseOptionalCXX11VirtSpecifierSeq - Parse a virt-specifier-seq.
2020 ///
2021 /// virt-specifier-seq:
2022 /// virt-specifier
2023 /// virt-specifier-seq virt-specifier
2024 void Parser::ParseOptionalCXX11VirtSpecifierSeq(VirtSpecifiers &VS,
2025  bool IsInterface,
2026  SourceLocation FriendLoc) {
2027  while (true) {
2028  VirtSpecifiers::Specifier Specifier = isCXX11VirtSpecifier();
2029  if (Specifier == VirtSpecifiers::VS_None)
2030  return;
2031 
2032  if (FriendLoc.isValid()) {
2033  Diag(Tok.getLocation(), diag::err_friend_decl_spec)
2034  << VirtSpecifiers::getSpecifierName(Specifier)
2036  << SourceRange(FriendLoc, FriendLoc);
2037  ConsumeToken();
2038  continue;
2039  }
2040 
2041  // C++ [class.mem]p8:
2042  // A virt-specifier-seq shall contain at most one of each virt-specifier.
2043  const char *PrevSpec = nullptr;
2044  if (VS.SetSpecifier(Specifier, Tok.getLocation(), PrevSpec))
2045  Diag(Tok.getLocation(), diag::err_duplicate_virt_specifier)
2046  << PrevSpec
2048 
2049  if (IsInterface && (Specifier == VirtSpecifiers::VS_Final ||
2050  Specifier == VirtSpecifiers::VS_Sealed)) {
2051  Diag(Tok.getLocation(), diag::err_override_control_interface)
2052  << VirtSpecifiers::getSpecifierName(Specifier);
2053  } else if (Specifier == VirtSpecifiers::VS_Sealed) {
2054  Diag(Tok.getLocation(), diag::ext_ms_sealed_keyword);
2055  } else {
2056  Diag(Tok.getLocation(),
2057  getLangOpts().CPlusPlus11
2058  ? diag::warn_cxx98_compat_override_control_keyword
2059  : diag::ext_override_control_keyword)
2060  << VirtSpecifiers::getSpecifierName(Specifier);
2061  }
2062  ConsumeToken();
2063  }
2064 }
2065 
2066 /// isCXX11FinalKeyword - Determine whether the next token is a C++11
2067 /// 'final' or Microsoft 'sealed' contextual keyword.
2068 bool Parser::isCXX11FinalKeyword() const {
2069  VirtSpecifiers::Specifier Specifier = isCXX11VirtSpecifier();
2070  return Specifier == VirtSpecifiers::VS_Final ||
2071  Specifier == VirtSpecifiers::VS_Sealed;
2072 }
2073 
2074 /// \brief Parse a C++ member-declarator up to, but not including, the optional
2075 /// brace-or-equal-initializer or pure-specifier.
2076 bool Parser::ParseCXXMemberDeclaratorBeforeInitializer(
2077  Declarator &DeclaratorInfo, VirtSpecifiers &VS, ExprResult &BitfieldSize,
2078  LateParsedAttrList &LateParsedAttrs) {
2079  // member-declarator:
2080  // declarator pure-specifier[opt]
2081  // declarator brace-or-equal-initializer[opt]
2082  // identifier[opt] ':' constant-expression
2083  if (Tok.isNot(tok::colon))
2084  ParseDeclarator(DeclaratorInfo);
2085  else
2086  DeclaratorInfo.SetIdentifier(nullptr, Tok.getLocation());
2087 
2088  if (!DeclaratorInfo.isFunctionDeclarator() && TryConsumeToken(tok::colon)) {
2089  assert(DeclaratorInfo.isPastIdentifier() &&
2090  "don't know where identifier would go yet?");
2091  BitfieldSize = ParseConstantExpression();
2092  if (BitfieldSize.isInvalid())
2093  SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
2094  } else {
2095  ParseOptionalCXX11VirtSpecifierSeq(
2096  VS, getCurrentClass().IsInterface,
2097  DeclaratorInfo.getDeclSpec().getFriendSpecLoc());
2098  if (!VS.isUnset())
2099  MaybeParseAndDiagnoseDeclSpecAfterCXX11VirtSpecifierSeq(DeclaratorInfo, VS);
2100  }
2101 
2102  // If a simple-asm-expr is present, parse it.
2103  if (Tok.is(tok::kw_asm)) {
2104  SourceLocation Loc;
2105  ExprResult AsmLabel(ParseSimpleAsm(&Loc));
2106  if (AsmLabel.isInvalid())
2107  SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
2108 
2109  DeclaratorInfo.setAsmLabel(AsmLabel.get());
2110  DeclaratorInfo.SetRangeEnd(Loc);
2111  }
2112 
2113  // If attributes exist after the declarator, but before an '{', parse them.
2114  MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs);
2115 
2116  // For compatibility with code written to older Clang, also accept a
2117  // virt-specifier *after* the GNU attributes.
2118  if (BitfieldSize.isUnset() && VS.isUnset()) {
2119  ParseOptionalCXX11VirtSpecifierSeq(
2120  VS, getCurrentClass().IsInterface,
2121  DeclaratorInfo.getDeclSpec().getFriendSpecLoc());
2122  if (!VS.isUnset()) {
2123  // If we saw any GNU-style attributes that are known to GCC followed by a
2124  // virt-specifier, issue a GCC-compat warning.
2125  const AttributeList *Attr = DeclaratorInfo.getAttributes();
2126  while (Attr) {
2127  if (Attr->isKnownToGCC() && !Attr->isCXX11Attribute())
2128  Diag(Attr->getLoc(), diag::warn_gcc_attribute_location);
2129  Attr = Attr->getNext();
2130  }
2131  MaybeParseAndDiagnoseDeclSpecAfterCXX11VirtSpecifierSeq(DeclaratorInfo, VS);
2132  }
2133  }
2134 
2135  // If this has neither a name nor a bit width, something has gone seriously
2136  // wrong. Skip until the semi-colon or }.
2137  if (!DeclaratorInfo.hasName() && BitfieldSize.isUnset()) {
2138  // If so, skip until the semi-colon or a }.
2139  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
2140  return true;
2141  }
2142  return false;
2143 }
2144 
2145 /// \brief Look for declaration specifiers possibly occurring after C++11
2146 /// virt-specifier-seq and diagnose them.
2147 void Parser::MaybeParseAndDiagnoseDeclSpecAfterCXX11VirtSpecifierSeq(
2148  Declarator &D,
2149  VirtSpecifiers &VS) {
2150  DeclSpec DS(AttrFactory);
2151 
2152  // GNU-style and C++11 attributes are not allowed here, but they will be
2153  // handled by the caller. Diagnose everything else.
2154  ParseTypeQualifierListOpt(DS, AR_NoAttributesParsed, false);
2155  D.ExtendWithDeclSpec(DS);
2156 
2157  if (D.isFunctionDeclarator()) {
2158  auto &Function = D.getFunctionTypeInfo();
2160  auto DeclSpecCheck = [&] (DeclSpec::TQ TypeQual,
2161  const char *FixItName,
2162  SourceLocation SpecLoc,
2163  unsigned* QualifierLoc) {
2164  FixItHint Insertion;
2165  if (DS.getTypeQualifiers() & TypeQual) {
2166  if (!(Function.TypeQuals & TypeQual)) {
2167  std::string Name(FixItName);
2168  Name += " ";
2169  Insertion = FixItHint::CreateInsertion(VS.getFirstLocation(), Name.c_str());
2170  Function.TypeQuals |= TypeQual;
2171  *QualifierLoc = SpecLoc.getRawEncoding();
2172  }
2173  Diag(SpecLoc, diag::err_declspec_after_virtspec)
2174  << FixItName
2176  << FixItHint::CreateRemoval(SpecLoc)
2177  << Insertion;
2178  }
2179  };
2180  DeclSpecCheck(DeclSpec::TQ_const, "const", DS.getConstSpecLoc(),
2181  &Function.ConstQualifierLoc);
2182  DeclSpecCheck(DeclSpec::TQ_volatile, "volatile", DS.getVolatileSpecLoc(),
2183  &Function.VolatileQualifierLoc);
2184  DeclSpecCheck(DeclSpec::TQ_restrict, "restrict", DS.getRestrictSpecLoc(),
2185  &Function.RestrictQualifierLoc);
2186  }
2187 
2188  // Parse ref-qualifiers.
2189  bool RefQualifierIsLValueRef = true;
2190  SourceLocation RefQualifierLoc;
2191  if (ParseRefQualifier(RefQualifierIsLValueRef, RefQualifierLoc)) {
2192  const char *Name = (RefQualifierIsLValueRef ? "& " : "&& ");
2194  Function.RefQualifierIsLValueRef = RefQualifierIsLValueRef;
2195  Function.RefQualifierLoc = RefQualifierLoc.getRawEncoding();
2196 
2197  Diag(RefQualifierLoc, diag::err_declspec_after_virtspec)
2198  << (RefQualifierIsLValueRef ? "&" : "&&")
2200  << FixItHint::CreateRemoval(RefQualifierLoc)
2201  << Insertion;
2202  D.SetRangeEnd(RefQualifierLoc);
2203  }
2204  }
2205 }
2206 
2207 /// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration.
2208 ///
2209 /// member-declaration:
2210 /// decl-specifier-seq[opt] member-declarator-list[opt] ';'
2211 /// function-definition ';'[opt]
2212 /// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO]
2213 /// using-declaration [TODO]
2214 /// [C++0x] static_assert-declaration
2215 /// template-declaration
2216 /// [GNU] '__extension__' member-declaration
2217 ///
2218 /// member-declarator-list:
2219 /// member-declarator
2220 /// member-declarator-list ',' member-declarator
2221 ///
2222 /// member-declarator:
2223 /// declarator virt-specifier-seq[opt] pure-specifier[opt]
2224 /// declarator constant-initializer[opt]
2225 /// [C++11] declarator brace-or-equal-initializer[opt]
2226 /// identifier[opt] ':' constant-expression
2227 ///
2228 /// virt-specifier-seq:
2229 /// virt-specifier
2230 /// virt-specifier-seq virt-specifier
2231 ///
2232 /// virt-specifier:
2233 /// override
2234 /// final
2235 /// [MS] sealed
2236 ///
2237 /// pure-specifier:
2238 /// '= 0'
2239 ///
2240 /// constant-initializer:
2241 /// '=' constant-expression
2242 ///
2244 Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS,
2245  AttributeList *AccessAttrs,
2246  const ParsedTemplateInfo &TemplateInfo,
2247  ParsingDeclRAIIObject *TemplateDiags) {
2248  if (Tok.is(tok::at)) {
2249  if (getLangOpts().ObjC1 && NextToken().isObjCAtKeyword(tok::objc_defs))
2250  Diag(Tok, diag::err_at_defs_cxx);
2251  else
2252  Diag(Tok, diag::err_at_in_class);
2253 
2254  ConsumeToken();
2255  SkipUntil(tok::r_brace, StopAtSemi);
2256  return DeclGroupPtrTy();
2257  }
2258 
2259  // Turn on colon protection early, while parsing declspec, although there is
2260  // nothing to protect there. It prevents from false errors if error recovery
2261  // incorrectly determines where the declspec ends, as in the example:
2262  // struct A { enum class B { C }; };
2263  // const int C = 4;
2264  // struct D { A::B : C; };
2266 
2267  // Access declarations.
2268  bool MalformedTypeSpec = false;
2269  if (!TemplateInfo.Kind &&
2270  Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw___super)) {
2272  MalformedTypeSpec = true;
2273 
2274  bool isAccessDecl;
2275  if (Tok.isNot(tok::annot_cxxscope))
2276  isAccessDecl = false;
2277  else if (NextToken().is(tok::identifier))
2278  isAccessDecl = GetLookAheadToken(2).is(tok::semi);
2279  else
2280  isAccessDecl = NextToken().is(tok::kw_operator);
2281 
2282  if (isAccessDecl) {
2283  // Collect the scope specifier token we annotated earlier.
2284  CXXScopeSpec SS;
2285  ParseOptionalCXXScopeSpecifier(SS, ParsedType(),
2286  /*EnteringContext=*/false);
2287 
2288  if (SS.isInvalid()) {
2289  SkipUntil(tok::semi);
2290  return DeclGroupPtrTy();
2291  }
2292 
2293  // Try to parse an unqualified-id.
2294  SourceLocation TemplateKWLoc;
2296  if (ParseUnqualifiedId(SS, false, true, true, ParsedType(),
2297  TemplateKWLoc, Name)) {
2298  SkipUntil(tok::semi);
2299  return DeclGroupPtrTy();
2300  }
2301 
2302  // TODO: recover from mistakenly-qualified operator declarations.
2303  if (ExpectAndConsume(tok::semi, diag::err_expected_after,
2304  "access declaration")) {
2305  SkipUntil(tok::semi);
2306  return DeclGroupPtrTy();
2307  }
2308 
2310  getCurScope(), AS,
2311  /* HasUsingKeyword */ false, SourceLocation(), SS, Name,
2312  /* AttrList */ nullptr,
2313  /* HasTypenameKeyword */ false, SourceLocation())));
2314  }
2315  }
2316 
2317  // static_assert-declaration. A templated static_assert declaration is
2318  // diagnosed in Parser::ParseSingleDeclarationAfterTemplate.
2319  if (!TemplateInfo.Kind &&
2320  Tok.isOneOf(tok::kw_static_assert, tok::kw__Static_assert)) {
2321  SourceLocation DeclEnd;
2322  return DeclGroupPtrTy::make(
2323  DeclGroupRef(ParseStaticAssertDeclaration(DeclEnd)));
2324  }
2325 
2326  if (Tok.is(tok::kw_template)) {
2327  assert(!TemplateInfo.TemplateParams &&
2328  "Nested template improperly parsed?");
2329  SourceLocation DeclEnd;
2330  return DeclGroupPtrTy::make(
2331  DeclGroupRef(ParseDeclarationStartingWithTemplate(
2332  Declarator::MemberContext, DeclEnd, AS, AccessAttrs)));
2333  }
2334 
2335  // Handle: member-declaration ::= '__extension__' member-declaration
2336  if (Tok.is(tok::kw___extension__)) {
2337  // __extension__ silences extension warnings in the subexpression.
2338  ExtensionRAIIObject O(Diags); // Use RAII to do this.
2339  ConsumeToken();
2340  return ParseCXXClassMemberDeclaration(AS, AccessAttrs,
2341  TemplateInfo, TemplateDiags);
2342  }
2343 
2344  ParsedAttributesWithRange attrs(AttrFactory);
2345  ParsedAttributesWithRange FnAttrs(AttrFactory);
2346  // Optional C++11 attribute-specifier
2347  MaybeParseCXX11Attributes(attrs);
2348  // We need to keep these attributes for future diagnostic
2349  // before they are taken over by declaration specifier.
2350  FnAttrs.addAll(attrs.getList());
2351  FnAttrs.Range = attrs.Range;
2352 
2353  MaybeParseMicrosoftAttributes(attrs);
2354 
2355  if (Tok.is(tok::kw_using)) {
2356  ProhibitAttributes(attrs);
2357 
2358  // Eat 'using'.
2359  SourceLocation UsingLoc = ConsumeToken();
2360 
2361  if (Tok.is(tok::kw_namespace)) {
2362  Diag(UsingLoc, diag::err_using_namespace_in_class);
2363  SkipUntil(tok::semi, StopBeforeMatch);
2364  return DeclGroupPtrTy();
2365  }
2366  SourceLocation DeclEnd;
2367  // Otherwise, it must be a using-declaration or an alias-declaration.
2368  return DeclGroupPtrTy::make(DeclGroupRef(ParseUsingDeclaration(
2369  Declarator::MemberContext, TemplateInfo, UsingLoc, DeclEnd, AS)));
2370  }
2371 
2372  // Hold late-parsed attributes so we can attach a Decl to them later.
2373  LateParsedAttrList CommonLateParsedAttrs;
2374 
2375  // decl-specifier-seq:
2376  // Parse the common declaration-specifiers piece.
2377  ParsingDeclSpec DS(*this, TemplateDiags);
2378  DS.takeAttributesFrom(attrs);
2379  if (MalformedTypeSpec)
2380  DS.SetTypeSpecError();
2381 
2382  ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC_class,
2383  &CommonLateParsedAttrs);
2384 
2385  // Turn off colon protection that was set for declspec.
2386  X.restore();
2387 
2388  // If we had a free-standing type definition with a missing semicolon, we
2389  // may get this far before the problem becomes obvious.
2390  if (DS.hasTagDefinition() &&
2391  TemplateInfo.Kind == ParsedTemplateInfo::NonTemplate &&
2392  DiagnoseMissingSemiAfterTagDefinition(DS, AS, DSC_class,
2393  &CommonLateParsedAttrs))
2394  return DeclGroupPtrTy();
2395 
2396  MultiTemplateParamsArg TemplateParams(
2397  TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data()
2398  : nullptr,
2399  TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0);
2400 
2401  if (TryConsumeToken(tok::semi)) {
2402  if (DS.isFriendSpecified())
2403  ProhibitAttributes(FnAttrs);
2404 
2405  Decl *TheDecl =
2406  Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS, TemplateParams);
2407  DS.complete(TheDecl);
2408  return DeclGroupPtrTy::make(DeclGroupRef(TheDecl));
2409  }
2410 
2411  ParsingDeclarator DeclaratorInfo(*this, DS, Declarator::MemberContext);
2412  VirtSpecifiers VS;
2413 
2414  // Hold late-parsed attributes so we can attach a Decl to them later.
2415  LateParsedAttrList LateParsedAttrs;
2416 
2417  SourceLocation EqualLoc;
2418  SourceLocation PureSpecLoc;
2419 
2420  auto TryConsumePureSpecifier = [&] (bool AllowDefinition) {
2421  if (Tok.isNot(tok::equal))
2422  return false;
2423 
2424  auto &Zero = NextToken();
2426  if (Zero.isNot(tok::numeric_constant) || Zero.getLength() != 1 ||
2427  PP.getSpelling(Zero, Buffer) != "0")
2428  return false;
2429 
2430  auto &After = GetLookAheadToken(2);
2431  if (!After.isOneOf(tok::semi, tok::comma) &&
2432  !(AllowDefinition &&
2433  After.isOneOf(tok::l_brace, tok::colon, tok::kw_try)))
2434  return false;
2435 
2436  EqualLoc = ConsumeToken();
2437  PureSpecLoc = ConsumeToken();
2438  return true;
2439  };
2440 
2441  SmallVector<Decl *, 8> DeclsInGroup;
2442  ExprResult BitfieldSize;
2443  bool ExpectSemi = true;
2444 
2445  // Parse the first declarator.
2446  if (ParseCXXMemberDeclaratorBeforeInitializer(
2447  DeclaratorInfo, VS, BitfieldSize, LateParsedAttrs)) {
2448  TryConsumeToken(tok::semi);
2449  return DeclGroupPtrTy();
2450  }
2451 
2452  // Check for a member function definition.
2453  if (BitfieldSize.isUnset()) {
2454  // MSVC permits pure specifier on inline functions defined at class scope.
2455  // Hence check for =0 before checking for function definition.
2456  if (getLangOpts().MicrosoftExt && DeclaratorInfo.isDeclarationOfFunction())
2457  TryConsumePureSpecifier(/*AllowDefinition*/ true);
2458 
2459  FunctionDefinitionKind DefinitionKind = FDK_Declaration;
2460  // function-definition:
2461  //
2462  // In C++11, a non-function declarator followed by an open brace is a
2463  // braced-init-list for an in-class member initialization, not an
2464  // erroneous function definition.
2465  if (Tok.is(tok::l_brace) && !getLangOpts().CPlusPlus11) {
2466  DefinitionKind = FDK_Definition;
2467  } else if (DeclaratorInfo.isFunctionDeclarator()) {
2468  if (Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try)) {
2469  DefinitionKind = FDK_Definition;
2470  } else if (Tok.is(tok::equal)) {
2471  const Token &KW = NextToken();
2472  if (KW.is(tok::kw_default))
2473  DefinitionKind = FDK_Defaulted;
2474  else if (KW.is(tok::kw_delete))
2475  DefinitionKind = FDK_Deleted;
2476  }
2477  }
2478  DeclaratorInfo.setFunctionDefinitionKind(DefinitionKind);
2479 
2480  // C++11 [dcl.attr.grammar] p4: If an attribute-specifier-seq appertains
2481  // to a friend declaration, that declaration shall be a definition.
2482  if (DeclaratorInfo.isFunctionDeclarator() &&
2483  DefinitionKind != FDK_Definition && DS.isFriendSpecified()) {
2484  // Diagnose attributes that appear before decl specifier:
2485  // [[]] friend int foo();
2486  ProhibitAttributes(FnAttrs);
2487  }
2488 
2489  if (DefinitionKind != FDK_Declaration) {
2490  if (!DeclaratorInfo.isFunctionDeclarator()) {
2491  Diag(DeclaratorInfo.getIdentifierLoc(), diag::err_func_def_no_params);
2492  ConsumeBrace();
2493  SkipUntil(tok::r_brace);
2494 
2495  // Consume the optional ';'
2496  TryConsumeToken(tok::semi);
2497 
2498  return DeclGroupPtrTy();
2499  }
2500 
2502  Diag(DeclaratorInfo.getIdentifierLoc(),
2503  diag::err_function_declared_typedef);
2504 
2505  // Recover by treating the 'typedef' as spurious.
2507  }
2508 
2509  Decl *FunDecl =
2510  ParseCXXInlineMethodDef(AS, AccessAttrs, DeclaratorInfo, TemplateInfo,
2511  VS, PureSpecLoc);
2512 
2513  if (FunDecl) {
2514  for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) {
2515  CommonLateParsedAttrs[i]->addDecl(FunDecl);
2516  }
2517  for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) {
2518  LateParsedAttrs[i]->addDecl(FunDecl);
2519  }
2520  }
2521  LateParsedAttrs.clear();
2522 
2523  // Consume the ';' - it's optional unless we have a delete or default
2524  if (Tok.is(tok::semi))
2525  ConsumeExtraSemi(AfterMemberFunctionDefinition);
2526 
2527  return DeclGroupPtrTy::make(DeclGroupRef(FunDecl));
2528  }
2529  }
2530 
2531  // member-declarator-list:
2532  // member-declarator
2533  // member-declarator-list ',' member-declarator
2534 
2535  while (1) {
2536  InClassInitStyle HasInClassInit = ICIS_NoInit;
2537  bool HasStaticInitializer = false;
2538  if (Tok.isOneOf(tok::equal, tok::l_brace) && PureSpecLoc.isInvalid()) {
2539  if (BitfieldSize.get()) {
2540  Diag(Tok, diag::err_bitfield_member_init);
2541  SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
2542  } else if (DeclaratorInfo.isDeclarationOfFunction()) {
2543  // It's a pure-specifier.
2544  if (!TryConsumePureSpecifier(/*AllowFunctionDefinition*/ false))
2545  // Parse it as an expression so that Sema can diagnose it.
2546  HasStaticInitializer = true;
2547  } else if (DeclaratorInfo.getDeclSpec().getStorageClassSpec() !=
2549  DeclaratorInfo.getDeclSpec().getStorageClassSpec() !=
2551  !DS.isFriendSpecified()) {
2552  // It's a default member initializer.
2553  HasInClassInit = Tok.is(tok::equal) ? ICIS_CopyInit : ICIS_ListInit;
2554  } else {
2555  HasStaticInitializer = true;
2556  }
2557  }
2558 
2559  // NOTE: If Sema is the Action module and declarator is an instance field,
2560  // this call will *not* return the created decl; It will return null.
2561  // See Sema::ActOnCXXMemberDeclarator for details.
2562 
2563  NamedDecl *ThisDecl = nullptr;
2564  if (DS.isFriendSpecified()) {
2565  // C++11 [dcl.attr.grammar] p4: If an attribute-specifier-seq appertains
2566  // to a friend declaration, that declaration shall be a definition.
2567  //
2568  // Diagnose attributes that appear in a friend member function declarator:
2569  // friend int foo [[]] ();
2571  DeclaratorInfo.getCXX11AttributeRanges(Ranges);
2572  for (SmallVectorImpl<SourceRange>::iterator I = Ranges.begin(),
2573  E = Ranges.end(); I != E; ++I)
2574  Diag((*I).getBegin(), diag::err_attributes_not_allowed) << *I;
2575 
2576  ThisDecl = Actions.ActOnFriendFunctionDecl(getCurScope(), DeclaratorInfo,
2577  TemplateParams);
2578  } else {
2579  ThisDecl = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS,
2580  DeclaratorInfo,
2581  TemplateParams,
2582  BitfieldSize.get(),
2583  VS, HasInClassInit);
2584 
2585  if (VarTemplateDecl *VT =
2586  ThisDecl ? dyn_cast<VarTemplateDecl>(ThisDecl) : nullptr)
2587  // Re-direct this decl to refer to the templated decl so that we can
2588  // initialize it.
2589  ThisDecl = VT->getTemplatedDecl();
2590 
2591  if (ThisDecl && AccessAttrs)
2592  Actions.ProcessDeclAttributeList(getCurScope(), ThisDecl, AccessAttrs);
2593  }
2594 
2595  // Error recovery might have converted a non-static member into a static
2596  // member.
2597  if (HasInClassInit != ICIS_NoInit &&
2598  DeclaratorInfo.getDeclSpec().getStorageClassSpec() ==
2600  HasInClassInit = ICIS_NoInit;
2601  HasStaticInitializer = true;
2602  }
2603 
2604  if (ThisDecl && PureSpecLoc.isValid())
2605  Actions.ActOnPureSpecifier(ThisDecl, PureSpecLoc);
2606 
2607  // Handle the initializer.
2608  if (HasInClassInit != ICIS_NoInit) {
2609  // The initializer was deferred; parse it and cache the tokens.
2611  ? diag::warn_cxx98_compat_nonstatic_member_init
2612  : diag::ext_nonstatic_member_init);
2613 
2614  if (DeclaratorInfo.isArrayOfUnknownBound()) {
2615  // C++11 [dcl.array]p3: An array bound may also be omitted when the
2616  // declarator is followed by an initializer.
2617  //
2618  // A brace-or-equal-initializer for a member-declarator is not an
2619  // initializer in the grammar, so this is ill-formed.
2620  Diag(Tok, diag::err_incomplete_array_member_init);
2621  SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
2622 
2623  // Avoid later warnings about a class member of incomplete type.
2624  if (ThisDecl)
2625  ThisDecl->setInvalidDecl();
2626  } else
2627  ParseCXXNonStaticMemberInitializer(ThisDecl);
2628  } else if (HasStaticInitializer) {
2629  // Normal initializer.
2630  ExprResult Init = ParseCXXMemberInitializer(
2631  ThisDecl, DeclaratorInfo.isDeclarationOfFunction(), EqualLoc);
2632 
2633  if (Init.isInvalid())
2634  SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
2635  else if (ThisDecl)
2636  Actions.AddInitializerToDecl(ThisDecl, Init.get(), EqualLoc.isInvalid(),
2638  } else if (ThisDecl && DS.getStorageClassSpec() == DeclSpec::SCS_static)
2639  // No initializer.
2640  Actions.ActOnUninitializedDecl(ThisDecl, DS.containsPlaceholderType());
2641 
2642  if (ThisDecl) {
2643  if (!ThisDecl->isInvalidDecl()) {
2644  // Set the Decl for any late parsed attributes
2645  for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i)
2646  CommonLateParsedAttrs[i]->addDecl(ThisDecl);
2647 
2648  for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i)
2649  LateParsedAttrs[i]->addDecl(ThisDecl);
2650  }
2651  Actions.FinalizeDeclaration(ThisDecl);
2652  DeclsInGroup.push_back(ThisDecl);
2653 
2654  if (DeclaratorInfo.isFunctionDeclarator() &&
2655  DeclaratorInfo.getDeclSpec().getStorageClassSpec() !=
2657  HandleMemberFunctionDeclDelays(DeclaratorInfo, ThisDecl);
2658  }
2659  LateParsedAttrs.clear();
2660 
2661  DeclaratorInfo.complete(ThisDecl);
2662 
2663  // If we don't have a comma, it is either the end of the list (a ';')
2664  // or an error, bail out.
2665  SourceLocation CommaLoc;
2666  if (!TryConsumeToken(tok::comma, CommaLoc))
2667  break;
2668 
2669  if (Tok.isAtStartOfLine() &&
2670  !MightBeDeclarator(Declarator::MemberContext)) {
2671  // This comma was followed by a line-break and something which can't be
2672  // the start of a declarator. The comma was probably a typo for a
2673  // semicolon.
2674  Diag(CommaLoc, diag::err_expected_semi_declaration)
2675  << FixItHint::CreateReplacement(CommaLoc, ";");
2676  ExpectSemi = false;
2677  break;
2678  }
2679 
2680  // Parse the next declarator.
2681  DeclaratorInfo.clear();
2682  VS.clear();
2683  BitfieldSize = ExprResult(/*Invalid=*/false);
2684  EqualLoc = PureSpecLoc = SourceLocation();
2685  DeclaratorInfo.setCommaLoc(CommaLoc);
2686 
2687  // GNU attributes are allowed before the second and subsequent declarator.
2688  MaybeParseGNUAttributes(DeclaratorInfo);
2689 
2690  if (ParseCXXMemberDeclaratorBeforeInitializer(
2691  DeclaratorInfo, VS, BitfieldSize, LateParsedAttrs))
2692  break;
2693  }
2694 
2695  if (ExpectSemi &&
2696  ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list)) {
2697  // Skip to end of block or statement.
2698  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
2699  // If we stopped at a ';', eat it.
2700  TryConsumeToken(tok::semi);
2701  return DeclGroupPtrTy();
2702  }
2703 
2704  return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup);
2705 }
2706 
2707 /// ParseCXXMemberInitializer - Parse the brace-or-equal-initializer.
2708 /// Also detect and reject any attempted defaulted/deleted function definition.
2709 /// The location of the '=', if any, will be placed in EqualLoc.
2710 ///
2711 /// This does not check for a pure-specifier; that's handled elsewhere.
2712 ///
2713 /// brace-or-equal-initializer:
2714 /// '=' initializer-expression
2715 /// braced-init-list
2716 ///
2717 /// initializer-clause:
2718 /// assignment-expression
2719 /// braced-init-list
2720 ///
2721 /// defaulted/deleted function-definition:
2722 /// '=' 'default'
2723 /// '=' 'delete'
2724 ///
2725 /// Prior to C++0x, the assignment-expression in an initializer-clause must
2726 /// be a constant-expression.
2727 ExprResult Parser::ParseCXXMemberInitializer(Decl *D, bool IsFunction,
2728  SourceLocation &EqualLoc) {
2729  assert(Tok.isOneOf(tok::equal, tok::l_brace)
2730  && "Data member initializer not starting with '=' or '{'");
2731 
2734  D);
2735  if (TryConsumeToken(tok::equal, EqualLoc)) {
2736  if (Tok.is(tok::kw_delete)) {
2737  // In principle, an initializer of '= delete p;' is legal, but it will
2738  // never type-check. It's better to diagnose it as an ill-formed expression
2739  // than as an ill-formed deleted non-function member.
2740  // An initializer of '= delete p, foo' will never be parsed, because
2741  // a top-level comma always ends the initializer expression.
2742  const Token &Next = NextToken();
2743  if (IsFunction || Next.isOneOf(tok::semi, tok::comma, tok::eof)) {
2744  if (IsFunction)
2745  Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
2746  << 1 /* delete */;
2747  else
2748  Diag(ConsumeToken(), diag::err_deleted_non_function);
2749  return ExprError();
2750  }
2751  } else if (Tok.is(tok::kw_default)) {
2752  if (IsFunction)
2753  Diag(Tok, diag::err_default_delete_in_multiple_declaration)
2754  << 0 /* default */;
2755  else
2756  Diag(ConsumeToken(), diag::err_default_special_members);
2757  return ExprError();
2758  }
2759  }
2760  if (const auto *PD = dyn_cast_or_null<MSPropertyDecl>(D)) {
2761  Diag(Tok, diag::err_ms_property_initializer) << PD;
2762  return ExprError();
2763  }
2764  return ParseInitializer();
2765 }
2766 
2767 void Parser::SkipCXXMemberSpecification(SourceLocation RecordLoc,
2768  SourceLocation AttrFixitLoc,
2769  unsigned TagType, Decl *TagDecl) {
2770  // Skip the optional 'final' keyword.
2771  if (getLangOpts().CPlusPlus && Tok.is(tok::identifier)) {
2772  assert(isCXX11FinalKeyword() && "not a class definition");
2773  ConsumeToken();
2774 
2775  // Diagnose any C++11 attributes after 'final' keyword.
2776  // We deliberately discard these attributes.
2777  ParsedAttributesWithRange Attrs(AttrFactory);
2778  CheckMisplacedCXX11Attribute(Attrs, AttrFixitLoc);
2779 
2780  // This can only happen if we had malformed misplaced attributes;
2781  // we only get called if there is a colon or left-brace after the
2782  // attributes.
2783  if (Tok.isNot(tok::colon) && Tok.isNot(tok::l_brace))
2784  return;
2785  }
2786 
2787  // Skip the base clauses. This requires actually parsing them, because
2788  // otherwise we can't be sure where they end (a left brace may appear
2789  // within a template argument).
2790  if (Tok.is(tok::colon)) {
2791  // Enter the scope of the class so that we can correctly parse its bases.
2792  ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope);
2793  ParsingClassDefinition ParsingDef(*this, TagDecl, /*NonNestedClass*/ true,
2794  TagType == DeclSpec::TST_interface);
2795  auto OldContext =
2796  Actions.ActOnTagStartSkippedDefinition(getCurScope(), TagDecl);
2797 
2798  // Parse the bases but don't attach them to the class.
2799  ParseBaseClause(nullptr);
2800 
2801  Actions.ActOnTagFinishSkippedDefinition(OldContext);
2802 
2803  if (!Tok.is(tok::l_brace)) {
2804  Diag(PP.getLocForEndOfToken(PrevTokLocation),
2805  diag::err_expected_lbrace_after_base_specifiers);
2806  return;
2807  }
2808  }
2809 
2810  // Skip the body.
2811  assert(Tok.is(tok::l_brace));
2812  BalancedDelimiterTracker T(*this, tok::l_brace);
2813  T.consumeOpen();
2814  T.skipToEnd();
2815 
2816  // Parse and discard any trailing attributes.
2817  ParsedAttributes Attrs(AttrFactory);
2818  if (Tok.is(tok::kw___attribute))
2819  MaybeParseGNUAttributes(Attrs);
2820 }
2821 
2822 Parser::DeclGroupPtrTy Parser::ParseCXXClassMemberDeclarationWithPragmas(
2823  AccessSpecifier &AS, ParsedAttributesWithRange &AccessAttrs,
2824  DeclSpec::TST TagType, Decl *TagDecl) {
2825  if (getLangOpts().MicrosoftExt &&
2826  Tok.isOneOf(tok::kw___if_exists, tok::kw___if_not_exists)) {
2827  ParseMicrosoftIfExistsClassDeclaration(TagType, AS);
2828  return DeclGroupPtrTy();
2829  }
2830 
2831  // Check for extraneous top-level semicolon.
2832  if (Tok.is(tok::semi)) {
2833  ConsumeExtraSemi(InsideStruct, TagType);
2834  return DeclGroupPtrTy();
2835  }
2836 
2837  if (Tok.is(tok::annot_pragma_vis)) {
2838  HandlePragmaVisibility();
2839  return DeclGroupPtrTy();
2840  }
2841 
2842  if (Tok.is(tok::annot_pragma_pack)) {
2843  HandlePragmaPack();
2844  return DeclGroupPtrTy();
2845  }
2846 
2847  if (Tok.is(tok::annot_pragma_align)) {
2848  HandlePragmaAlign();
2849  return DeclGroupPtrTy();
2850  }
2851 
2852  if (Tok.is(tok::annot_pragma_ms_pointers_to_members)) {
2853  HandlePragmaMSPointersToMembers();
2854  return DeclGroupPtrTy();
2855  }
2856 
2857  if (Tok.is(tok::annot_pragma_ms_pragma)) {
2858  HandlePragmaMSPragma();
2859  return DeclGroupPtrTy();
2860  }
2861 
2862  if (Tok.is(tok::annot_pragma_ms_vtordisp)) {
2863  HandlePragmaMSVtorDisp();
2864  return DeclGroupPtrTy();
2865  }
2866 
2867  // If we see a namespace here, a close brace was missing somewhere.
2868  if (Tok.is(tok::kw_namespace)) {
2869  DiagnoseUnexpectedNamespace(cast<NamedDecl>(TagDecl));
2870  return DeclGroupPtrTy();
2871  }
2872 
2873  AccessSpecifier NewAS = getAccessSpecifierIfPresent();
2874  if (NewAS != AS_none) {
2875  // Current token is a C++ access specifier.
2876  AS = NewAS;
2877  SourceLocation ASLoc = Tok.getLocation();
2878  unsigned TokLength = Tok.getLength();
2879  ConsumeToken();
2880  AccessAttrs.clear();
2881  MaybeParseGNUAttributes(AccessAttrs);
2882 
2883  SourceLocation EndLoc;
2884  if (TryConsumeToken(tok::colon, EndLoc)) {
2885  } else if (TryConsumeToken(tok::semi, EndLoc)) {
2886  Diag(EndLoc, diag::err_expected)
2887  << tok::colon << FixItHint::CreateReplacement(EndLoc, ":");
2888  } else {
2889  EndLoc = ASLoc.getLocWithOffset(TokLength);
2890  Diag(EndLoc, diag::err_expected)
2891  << tok::colon << FixItHint::CreateInsertion(EndLoc, ":");
2892  }
2893 
2894  // The Microsoft extension __interface does not permit non-public
2895  // access specifiers.
2896  if (TagType == DeclSpec::TST_interface && AS != AS_public) {
2897  Diag(ASLoc, diag::err_access_specifier_interface) << (AS == AS_protected);
2898  }
2899 
2900  if (Actions.ActOnAccessSpecifier(NewAS, ASLoc, EndLoc,
2901  AccessAttrs.getList())) {
2902  // found another attribute than only annotations
2903  AccessAttrs.clear();
2904  }
2905 
2906  return DeclGroupPtrTy();
2907  }
2908 
2909  if (Tok.is(tok::annot_pragma_openmp))
2910  return ParseOpenMPDeclarativeDirective();
2911 
2912  // Parse all the comma separated declarators.
2913  return ParseCXXClassMemberDeclaration(AS, AccessAttrs.getList());
2914 }
2915 
2916 /// ParseCXXMemberSpecification - Parse the class definition.
2917 ///
2918 /// member-specification:
2919 /// member-declaration member-specification[opt]
2920 /// access-specifier ':' member-specification[opt]
2921 ///
2922 void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc,
2923  SourceLocation AttrFixitLoc,
2924  ParsedAttributesWithRange &Attrs,
2925  unsigned TagType, Decl *TagDecl) {
2926  assert((TagType == DeclSpec::TST_struct ||
2927  TagType == DeclSpec::TST_interface ||
2928  TagType == DeclSpec::TST_union ||
2929  TagType == DeclSpec::TST_class) && "Invalid TagType!");
2930 
2931  PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc,
2932  "parsing struct/union/class body");
2933 
2934  // Determine whether this is a non-nested class. Note that local
2935  // classes are *not* considered to be nested classes.
2936  bool NonNestedClass = true;
2937  if (!ClassStack.empty()) {
2938  for (const Scope *S = getCurScope(); S; S = S->getParent()) {
2939  if (S->isClassScope()) {
2940  // We're inside a class scope, so this is a nested class.
2941  NonNestedClass = false;
2942 
2943  // The Microsoft extension __interface does not permit nested classes.
2944  if (getCurrentClass().IsInterface) {
2945  Diag(RecordLoc, diag::err_invalid_member_in_interface)
2946  << /*ErrorType=*/6
2947  << (isa<NamedDecl>(TagDecl)
2948  ? cast<NamedDecl>(TagDecl)->getQualifiedNameAsString()
2949  : "(anonymous)");
2950  }
2951  break;
2952  }
2953 
2954  if ((S->getFlags() & Scope::FnScope))
2955  // If we're in a function or function template then this is a local
2956  // class rather than a nested class.
2957  break;
2958  }
2959  }
2960 
2961  // Enter a scope for the class.
2962  ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope);
2963 
2964  // Note that we are parsing a new (potentially-nested) class definition.
2965  ParsingClassDefinition ParsingDef(*this, TagDecl, NonNestedClass,
2966  TagType == DeclSpec::TST_interface);
2967 
2968  if (TagDecl)
2969  Actions.ActOnTagStartDefinition(getCurScope(), TagDecl);
2970 
2971  SourceLocation FinalLoc;
2972  bool IsFinalSpelledSealed = false;
2973 
2974  // Parse the optional 'final' keyword.
2975  if (getLangOpts().CPlusPlus && Tok.is(tok::identifier)) {
2976  VirtSpecifiers::Specifier Specifier = isCXX11VirtSpecifier(Tok);
2977  assert((Specifier == VirtSpecifiers::VS_Final ||
2978  Specifier == VirtSpecifiers::VS_Sealed) &&
2979  "not a class definition");
2980  FinalLoc = ConsumeToken();
2981  IsFinalSpelledSealed = Specifier == VirtSpecifiers::VS_Sealed;
2982 
2983  if (TagType == DeclSpec::TST_interface)
2984  Diag(FinalLoc, diag::err_override_control_interface)
2985  << VirtSpecifiers::getSpecifierName(Specifier);
2986  else if (Specifier == VirtSpecifiers::VS_Final)
2987  Diag(FinalLoc, getLangOpts().CPlusPlus11
2988  ? diag::warn_cxx98_compat_override_control_keyword
2989  : diag::ext_override_control_keyword)
2990  << VirtSpecifiers::getSpecifierName(Specifier);
2991  else if (Specifier == VirtSpecifiers::VS_Sealed)
2992  Diag(FinalLoc, diag::ext_ms_sealed_keyword);
2993 
2994  // Parse any C++11 attributes after 'final' keyword.
2995  // These attributes are not allowed to appear here,
2996  // and the only possible place for them to appertain
2997  // to the class would be between class-key and class-name.
2998  CheckMisplacedCXX11Attribute(Attrs, AttrFixitLoc);
2999 
3000  // ParseClassSpecifier() does only a superficial check for attributes before
3001  // deciding to call this method. For example, for
3002  // `class C final alignas ([l) {` it will decide that this looks like a
3003  // misplaced attribute since it sees `alignas '(' ')'`. But the actual
3004  // attribute parsing code will try to parse the '[' as a constexpr lambda
3005  // and consume enough tokens that the alignas parsing code will eat the
3006  // opening '{'. So bail out if the next token isn't one we expect.
3007  if (!Tok.is(tok::colon) && !Tok.is(tok::l_brace)) {
3008  if (TagDecl)
3009  Actions.ActOnTagDefinitionError(getCurScope(), TagDecl);
3010  return;
3011  }
3012  }
3013 
3014  if (Tok.is(tok::colon)) {
3015  ParseBaseClause(TagDecl);
3016  if (!Tok.is(tok::l_brace)) {
3017  bool SuggestFixIt = false;
3018  SourceLocation BraceLoc = PP.getLocForEndOfToken(PrevTokLocation);
3019  if (Tok.isAtStartOfLine()) {
3020  switch (Tok.getKind()) {
3021  case tok::kw_private:
3022  case tok::kw_protected:
3023  case tok::kw_public:
3024  SuggestFixIt = NextToken().getKind() == tok::colon;
3025  break;
3026  case tok::kw_static_assert:
3027  case tok::r_brace:
3028  case tok::kw_using:
3029  // base-clause can have simple-template-id; 'template' can't be there
3030  case tok::kw_template:
3031  SuggestFixIt = true;
3032  break;
3033  case tok::identifier:
3034  SuggestFixIt = isConstructorDeclarator(true);
3035  break;
3036  default:
3037  SuggestFixIt = isCXXSimpleDeclaration(/*AllowForRangeDecl=*/false);
3038  break;
3039  }
3040  }
3041  DiagnosticBuilder LBraceDiag =
3042  Diag(BraceLoc, diag::err_expected_lbrace_after_base_specifiers);
3043  if (SuggestFixIt) {
3044  LBraceDiag << FixItHint::CreateInsertion(BraceLoc, " {");
3045  // Try recovering from missing { after base-clause.
3046  PP.EnterToken(Tok);
3047  Tok.setKind(tok::l_brace);
3048  } else {
3049  if (TagDecl)
3050  Actions.ActOnTagDefinitionError(getCurScope(), TagDecl);
3051  return;
3052  }
3053  }
3054  }
3055 
3056  assert(Tok.is(tok::l_brace));
3057  BalancedDelimiterTracker T(*this, tok::l_brace);
3058  T.consumeOpen();
3059 
3060  if (TagDecl)
3061  Actions.ActOnStartCXXMemberDeclarations(getCurScope(), TagDecl, FinalLoc,
3062  IsFinalSpelledSealed,
3063  T.getOpenLocation());
3064 
3065  // C++ 11p3: Members of a class defined with the keyword class are private
3066  // by default. Members of a class defined with the keywords struct or union
3067  // are public by default.
3068  AccessSpecifier CurAS;
3069  if (TagType == DeclSpec::TST_class)
3070  CurAS = AS_private;
3071  else
3072  CurAS = AS_public;
3073  ParsedAttributesWithRange AccessAttrs(AttrFactory);
3074 
3075  if (TagDecl) {
3076  // While we still have something to read, read the member-declarations.
3077  while (!tryParseMisplacedModuleImport() && Tok.isNot(tok::r_brace) &&
3078  Tok.isNot(tok::eof)) {
3079  // Each iteration of this loop reads one member-declaration.
3080  ParseCXXClassMemberDeclarationWithPragmas(
3081  CurAS, AccessAttrs, static_cast<DeclSpec::TST>(TagType), TagDecl);
3082  }
3083  T.consumeClose();
3084  } else {
3085  SkipUntil(tok::r_brace);
3086  }
3087 
3088  // If attributes exist after class contents, parse them.
3089  ParsedAttributes attrs(AttrFactory);
3090  MaybeParseGNUAttributes(attrs);
3091 
3092  if (TagDecl)
3093  Actions.ActOnFinishCXXMemberSpecification(getCurScope(), RecordLoc, TagDecl,
3094  T.getOpenLocation(),
3095  T.getCloseLocation(),
3096  attrs.getList());
3097 
3098  // C++11 [class.mem]p2:
3099  // Within the class member-specification, the class is regarded as complete
3100  // within function bodies, default arguments, exception-specifications, and
3101  // brace-or-equal-initializers for non-static data members (including such
3102  // things in nested classes).
3103  if (TagDecl && NonNestedClass) {
3104  // We are not inside a nested class. This class and its nested classes
3105  // are complete and we can parse the delayed portions of method
3106  // declarations and the lexed inline method definitions, along with any
3107  // delayed attributes.
3108  SourceLocation SavedPrevTokLocation = PrevTokLocation;
3109  ParseLexedAttributes(getCurrentClass());
3110  ParseLexedMethodDeclarations(getCurrentClass());
3111 
3112  // We've finished with all pending member declarations.
3113  Actions.ActOnFinishCXXMemberDecls();
3114 
3115  ParseLexedMemberInitializers(getCurrentClass());
3116  ParseLexedMethodDefs(getCurrentClass());
3117  PrevTokLocation = SavedPrevTokLocation;
3118 
3119  // We've finished parsing everything, including default argument
3120  // initializers.
3121  Actions.ActOnFinishCXXNonNestedClass(TagDecl);
3122  }
3123 
3124  if (TagDecl)
3125  Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl,
3126  T.getCloseLocation());
3127 
3128  // Leave the class scope.
3129  ParsingDef.Pop();
3130  ClassScope.Exit();
3131 }
3132 
3133 void Parser::DiagnoseUnexpectedNamespace(NamedDecl *D) {
3134  assert(Tok.is(tok::kw_namespace));
3135 
3136  // FIXME: Suggest where the close brace should have gone by looking
3137  // at indentation changes within the definition body.
3138  Diag(D->getLocation(),
3139  diag::err_missing_end_of_definition) << D;
3140  Diag(Tok.getLocation(),
3141  diag::note_missing_end_of_definition_before) << D;
3142 
3143  // Push '};' onto the token stream to recover.
3144  PP.EnterToken(Tok);
3145 
3146  Tok.startToken();
3147  Tok.setLocation(PP.getLocForEndOfToken(PrevTokLocation));
3148  Tok.setKind(tok::semi);
3149  PP.EnterToken(Tok);
3150 
3151  Tok.setKind(tok::r_brace);
3152 }
3153 
3154 /// ParseConstructorInitializer - Parse a C++ constructor initializer,
3155 /// which explicitly initializes the members or base classes of a
3156 /// class (C++ [class.base.init]). For example, the three initializers
3157 /// after the ':' in the Derived constructor below:
3158 ///
3159 /// @code
3160 /// class Base { };
3161 /// class Derived : Base {
3162 /// int x;
3163 /// float f;
3164 /// public:
3165 /// Derived(float f) : Base(), x(17), f(f) { }
3166 /// };
3167 /// @endcode
3168 ///
3169 /// [C++] ctor-initializer:
3170 /// ':' mem-initializer-list
3171 ///
3172 /// [C++] mem-initializer-list:
3173 /// mem-initializer ...[opt]
3174 /// mem-initializer ...[opt] , mem-initializer-list
3175 void Parser::ParseConstructorInitializer(Decl *ConstructorDecl) {
3176  assert(Tok.is(tok::colon) &&
3177  "Constructor initializer always starts with ':'");
3178 
3179  // Poison the SEH identifiers so they are flagged as illegal in constructor
3180  // initializers.
3181  PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true);
3183 
3184  SmallVector<CXXCtorInitializer*, 4> MemInitializers;
3185  bool AnyErrors = false;
3186 
3187  do {
3188  if (Tok.is(tok::code_completion)) {
3189  Actions.CodeCompleteConstructorInitializer(ConstructorDecl,
3190  MemInitializers);
3191  return cutOffParsing();
3192  } else {
3193  MemInitResult MemInit = ParseMemInitializer(ConstructorDecl);
3194  if (!MemInit.isInvalid())
3195  MemInitializers.push_back(MemInit.get());
3196  else
3197  AnyErrors = true;
3198  }
3199 
3200  if (Tok.is(tok::comma))
3201  ConsumeToken();
3202  else if (Tok.is(tok::l_brace))
3203  break;
3204  // If the next token looks like a base or member initializer, assume that
3205  // we're just missing a comma.
3206  else if (Tok.isOneOf(tok::identifier, tok::coloncolon)) {
3207  SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation);
3208  Diag(Loc, diag::err_ctor_init_missing_comma)
3209  << FixItHint::CreateInsertion(Loc, ", ");
3210  } else {
3211  // Skip over garbage, until we get to '{'. Don't eat the '{'.
3212  Diag(Tok.getLocation(), diag::err_expected_either) << tok::l_brace
3213  << tok::comma;
3214  SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
3215  break;
3216  }
3217  } while (true);
3218 
3219  Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, MemInitializers,
3220  AnyErrors);
3221 }
3222 
3223 /// ParseMemInitializer - Parse a C++ member initializer, which is
3224 /// part of a constructor initializer that explicitly initializes one
3225 /// member or base class (C++ [class.base.init]). See
3226 /// ParseConstructorInitializer for an example.
3227 ///
3228 /// [C++] mem-initializer:
3229 /// mem-initializer-id '(' expression-list[opt] ')'
3230 /// [C++0x] mem-initializer-id braced-init-list
3231 ///
3232 /// [C++] mem-initializer-id:
3233 /// '::'[opt] nested-name-specifier[opt] class-name
3234 /// identifier
3235 MemInitResult Parser::ParseMemInitializer(Decl *ConstructorDecl) {
3236  // parse '::'[opt] nested-name-specifier[opt]
3237  CXXScopeSpec SS;
3238  ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false);
3239  ParsedType TemplateTypeTy;
3240  if (Tok.is(tok::annot_template_id)) {
3241  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
3242  if (TemplateId->Kind == TNK_Type_template ||
3243  TemplateId->Kind == TNK_Dependent_template_name) {
3244  AnnotateTemplateIdTokenAsType();
3245  assert(Tok.is(tok::annot_typename) && "template-id -> type failed");
3246  TemplateTypeTy = getTypeAnnotation(Tok);
3247  }
3248  }
3249  // Uses of decltype will already have been converted to annot_decltype by
3250  // ParseOptionalCXXScopeSpecifier at this point.
3251  if (!TemplateTypeTy && Tok.isNot(tok::identifier)
3252  && Tok.isNot(tok::annot_decltype)) {
3253  Diag(Tok, diag::err_expected_member_or_base_name);
3254  return true;
3255  }
3256 
3257  IdentifierInfo *II = nullptr;
3258  DeclSpec DS(AttrFactory);
3259  SourceLocation IdLoc = Tok.getLocation();
3260  if (Tok.is(tok::annot_decltype)) {
3261  // Get the decltype expression, if there is one.
3262  ParseDecltypeSpecifier(DS);
3263  } else {
3264  if (Tok.is(tok::identifier))
3265  // Get the identifier. This may be a member name or a class name,
3266  // but we'll let the semantic analysis determine which it is.
3267  II = Tok.getIdentifierInfo();
3268  ConsumeToken();
3269  }
3270 
3271 
3272  // Parse the '('.
3273  if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
3274  Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
3275 
3276  ExprResult InitList = ParseBraceInitializer();
3277  if (InitList.isInvalid())
3278  return true;
3279 
3280  SourceLocation EllipsisLoc;
3281  TryConsumeToken(tok::ellipsis, EllipsisLoc);
3282 
3283  return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II,
3284  TemplateTypeTy, DS, IdLoc,
3285  InitList.get(), EllipsisLoc);
3286  } else if(Tok.is(tok::l_paren)) {
3287  BalancedDelimiterTracker T(*this, tok::l_paren);
3288  T.consumeOpen();
3289 
3290  // Parse the optional expression-list.
3291  ExprVector ArgExprs;
3292  CommaLocsTy CommaLocs;
3293  if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) {
3294  SkipUntil(tok::r_paren, StopAtSemi);
3295  return true;
3296  }
3297 
3298  T.consumeClose();
3299 
3300  SourceLocation EllipsisLoc;
3301  TryConsumeToken(tok::ellipsis, EllipsisLoc);
3302 
3303  return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II,
3304  TemplateTypeTy, DS, IdLoc,
3305  T.getOpenLocation(), ArgExprs,
3306  T.getCloseLocation(), EllipsisLoc);
3307  }
3308 
3309  if (getLangOpts().CPlusPlus11)
3310  return Diag(Tok, diag::err_expected_either) << tok::l_paren << tok::l_brace;
3311  else
3312  return Diag(Tok, diag::err_expected) << tok::l_paren;
3313 }
3314 
3315 /// \brief Parse a C++ exception-specification if present (C++0x [except.spec]).
3316 ///
3317 /// exception-specification:
3318 /// dynamic-exception-specification
3319 /// noexcept-specification
3320 ///
3321 /// noexcept-specification:
3322 /// 'noexcept'
3323 /// 'noexcept' '(' constant-expression ')'
3325 Parser::tryParseExceptionSpecification(bool Delayed,
3326  SourceRange &SpecificationRange,
3327  SmallVectorImpl<ParsedType> &DynamicExceptions,
3328  SmallVectorImpl<SourceRange> &DynamicExceptionRanges,
3329  ExprResult &NoexceptExpr,
3330  CachedTokens *&ExceptionSpecTokens) {
3332  ExceptionSpecTokens = nullptr;
3333 
3334  // Handle delayed parsing of exception-specifications.
3335  if (Delayed) {
3336  if (Tok.isNot(tok::kw_throw) && Tok.isNot(tok::kw_noexcept))
3337  return EST_None;
3338 
3339  // Consume and cache the starting token.
3340  bool IsNoexcept = Tok.is(tok::kw_noexcept);
3341  Token StartTok = Tok;
3342  SpecificationRange = SourceRange(ConsumeToken());
3343 
3344  // Check for a '('.
3345  if (!Tok.is(tok::l_paren)) {
3346  // If this is a bare 'noexcept', we're done.
3347  if (IsNoexcept) {
3348  Diag(Tok, diag::warn_cxx98_compat_noexcept_decl);
3349  NoexceptExpr = nullptr;
3350  return EST_BasicNoexcept;
3351  }
3352 
3353  Diag(Tok, diag::err_expected_lparen_after) << "throw";
3354  return EST_DynamicNone;
3355  }
3356 
3357  // Cache the tokens for the exception-specification.
3358  ExceptionSpecTokens = new CachedTokens;
3359  ExceptionSpecTokens->push_back(StartTok); // 'throw' or 'noexcept'
3360  ExceptionSpecTokens->push_back(Tok); // '('
3361  SpecificationRange.setEnd(ConsumeParen()); // '('
3362 
3363  ConsumeAndStoreUntil(tok::r_paren, *ExceptionSpecTokens,
3364  /*StopAtSemi=*/true,
3365  /*ConsumeFinalToken=*/true);
3366  SpecificationRange.setEnd(ExceptionSpecTokens->back().getLocation());
3367 
3368  return EST_Unparsed;
3369  }
3370 
3371  // See if there's a dynamic specification.
3372  if (Tok.is(tok::kw_throw)) {
3373  Result = ParseDynamicExceptionSpecification(SpecificationRange,
3374  DynamicExceptions,
3375  DynamicExceptionRanges);
3376  assert(DynamicExceptions.size() == DynamicExceptionRanges.size() &&
3377  "Produced different number of exception types and ranges.");
3378  }
3379 
3380  // If there's no noexcept specification, we're done.
3381  if (Tok.isNot(tok::kw_noexcept))
3382  return Result;
3383 
3384  Diag(Tok, diag::warn_cxx98_compat_noexcept_decl);
3385 
3386  // If we already had a dynamic specification, parse the noexcept for,
3387  // recovery, but emit a diagnostic and don't store the results.
3388  SourceRange NoexceptRange;
3389  ExceptionSpecificationType NoexceptType = EST_None;
3390 
3391  SourceLocation KeywordLoc = ConsumeToken();
3392  if (Tok.is(tok::l_paren)) {
3393  // There is an argument.
3394  BalancedDelimiterTracker T(*this, tok::l_paren);
3395  T.consumeOpen();
3396  NoexceptType = EST_ComputedNoexcept;
3397  NoexceptExpr = ParseConstantExpression();
3398  T.consumeClose();
3399  // The argument must be contextually convertible to bool. We use
3400  // ActOnBooleanCondition for this purpose.
3401  if (!NoexceptExpr.isInvalid()) {
3402  NoexceptExpr = Actions.ActOnBooleanCondition(getCurScope(), KeywordLoc,
3403  NoexceptExpr.get());
3404  NoexceptRange = SourceRange(KeywordLoc, T.getCloseLocation());
3405  } else {
3406  NoexceptType = EST_None;
3407  }
3408  } else {
3409  // There is no argument.
3410  NoexceptType = EST_BasicNoexcept;
3411  NoexceptRange = SourceRange(KeywordLoc, KeywordLoc);
3412  }
3413 
3414  if (Result == EST_None) {
3415  SpecificationRange = NoexceptRange;
3416  Result = NoexceptType;
3417 
3418  // If there's a dynamic specification after a noexcept specification,
3419  // parse that and ignore the results.
3420  if (Tok.is(tok::kw_throw)) {
3421  Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification);
3422  ParseDynamicExceptionSpecification(NoexceptRange, DynamicExceptions,
3423  DynamicExceptionRanges);
3424  }
3425  } else {
3426  Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification);
3427  }
3428 
3429  return Result;
3430 }
3431 
3433  Parser &P, SourceRange Range, bool IsNoexcept) {
3434  if (P.getLangOpts().CPlusPlus11) {
3435  const char *Replacement = IsNoexcept ? "noexcept" : "noexcept(false)";
3436  P.Diag(Range.getBegin(), diag::warn_exception_spec_deprecated) << Range;
3437  P.Diag(Range.getBegin(), diag::note_exception_spec_deprecated)
3438  << Replacement << FixItHint::CreateReplacement(Range, Replacement);
3439  }
3440 }
3441 
3442 /// ParseDynamicExceptionSpecification - Parse a C++
3443 /// dynamic-exception-specification (C++ [except.spec]).
3444 ///
3445 /// dynamic-exception-specification:
3446 /// 'throw' '(' type-id-list [opt] ')'
3447 /// [MS] 'throw' '(' '...' ')'
3448 ///
3449 /// type-id-list:
3450 /// type-id ... [opt]
3451 /// type-id-list ',' type-id ... [opt]
3452 ///
3453 ExceptionSpecificationType Parser::ParseDynamicExceptionSpecification(
3454  SourceRange &SpecificationRange,
3455  SmallVectorImpl<ParsedType> &Exceptions,
3456  SmallVectorImpl<SourceRange> &Ranges) {
3457  assert(Tok.is(tok::kw_throw) && "expected throw");
3458 
3459  SpecificationRange.setBegin(ConsumeToken());
3460  BalancedDelimiterTracker T(*this, tok::l_paren);
3461  if (T.consumeOpen()) {
3462  Diag(Tok, diag::err_expected_lparen_after) << "throw";
3463  SpecificationRange.setEnd(SpecificationRange.getBegin());
3464  return EST_DynamicNone;
3465  }
3466 
3467  // Parse throw(...), a Microsoft extension that means "this function
3468  // can throw anything".
3469  if (Tok.is(tok::ellipsis)) {
3470  SourceLocation EllipsisLoc = ConsumeToken();
3471  if (!getLangOpts().MicrosoftExt)
3472  Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec);
3473  T.consumeClose();
3474  SpecificationRange.setEnd(T.getCloseLocation());
3475  diagnoseDynamicExceptionSpecification(*this, SpecificationRange, false);
3476  return EST_MSAny;
3477  }
3478 
3479  // Parse the sequence of type-ids.
3480  SourceRange Range;
3481  while (Tok.isNot(tok::r_paren)) {
3482  TypeResult Res(ParseTypeName(&Range));
3483 
3484  if (Tok.is(tok::ellipsis)) {
3485  // C++0x [temp.variadic]p5:
3486  // - In a dynamic-exception-specification (15.4); the pattern is a
3487  // type-id.
3488  SourceLocation Ellipsis = ConsumeToken();
3489  Range.setEnd(Ellipsis);
3490  if (!Res.isInvalid())
3491  Res = Actions.ActOnPackExpansion(Res.get(), Ellipsis);
3492  }
3493 
3494  if (!Res.isInvalid()) {
3495  Exceptions.push_back(Res.get());
3496  Ranges.push_back(Range);
3497  }
3498 
3499  if (!TryConsumeToken(tok::comma))
3500  break;
3501  }
3502 
3503  T.consumeClose();
3504  SpecificationRange.setEnd(T.getCloseLocation());
3505  diagnoseDynamicExceptionSpecification(*this, SpecificationRange,
3506  Exceptions.empty());
3507  return Exceptions.empty() ? EST_DynamicNone : EST_Dynamic;
3508 }
3509 
3510 /// ParseTrailingReturnType - Parse a trailing return type on a new-style
3511 /// function declaration.
3512 TypeResult Parser::ParseTrailingReturnType(SourceRange &Range) {
3513  assert(Tok.is(tok::arrow) && "expected arrow");
3514 
3515  ConsumeToken();
3516 
3518 }
3519 
3520 /// \brief We have just started parsing the definition of a new class,
3521 /// so push that class onto our stack of classes that is currently
3522 /// being parsed.
3524 Parser::PushParsingClass(Decl *ClassDecl, bool NonNestedClass,
3525  bool IsInterface) {
3526  assert((NonNestedClass || !ClassStack.empty()) &&
3527  "Nested class without outer class");
3528  ClassStack.push(new ParsingClass(ClassDecl, NonNestedClass, IsInterface));
3529  return Actions.PushParsingClass();
3530 }
3531 
3532 /// \brief Deallocate the given parsed class and all of its nested
3533 /// classes.
3534 void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) {
3535  for (unsigned I = 0, N = Class->LateParsedDeclarations.size(); I != N; ++I)
3536  delete Class->LateParsedDeclarations[I];
3537  delete Class;
3538 }
3539 
3540 /// \brief Pop the top class of the stack of classes that are
3541 /// currently being parsed.
3542 ///
3543 /// This routine should be called when we have finished parsing the
3544 /// definition of a class, but have not yet popped the Scope
3545 /// associated with the class's definition.
3546 void Parser::PopParsingClass(Sema::ParsingClassState state) {
3547  assert(!ClassStack.empty() && "Mismatched push/pop for class parsing");
3548 
3549  Actions.PopParsingClass(state);
3550 
3551  ParsingClass *Victim = ClassStack.top();
3552  ClassStack.pop();
3553  if (Victim->TopLevelClass) {
3554  // Deallocate all of the nested classes of this class,
3555  // recursively: we don't need to keep any of this information.
3556  DeallocateParsedClasses(Victim);
3557  return;
3558  }
3559  assert(!ClassStack.empty() && "Missing top-level class?");
3560 
3561  if (Victim->LateParsedDeclarations.empty()) {
3562  // The victim is a nested class, but we will not need to perform
3563  // any processing after the definition of this class since it has
3564  // no members whose handling was delayed. Therefore, we can just
3565  // remove this nested class.
3566  DeallocateParsedClasses(Victim);
3567  return;
3568  }
3569 
3570  // This nested class has some members that will need to be processed
3571  // after the top-level class is completely defined. Therefore, add
3572  // it to the list of nested classes within its parent.
3573  assert(getCurScope()->isClassScope() && "Nested class outside of class scope?");
3574  ClassStack.top()->LateParsedDeclarations.push_back(new LateParsedClass(this, Victim));
3575  Victim->TemplateScope = getCurScope()->getParent()->isTemplateParamScope();
3576 }
3577 
3578 /// \brief Try to parse an 'identifier' which appears within an attribute-token.
3579 ///
3580 /// \return the parsed identifier on success, and 0 if the next token is not an
3581 /// attribute-token.
3582 ///
3583 /// C++11 [dcl.attr.grammar]p3:
3584 /// If a keyword or an alternative token that satisfies the syntactic
3585 /// requirements of an identifier is contained in an attribute-token,
3586 /// it is considered an identifier.
3587 IdentifierInfo *Parser::TryParseCXX11AttributeIdentifier(SourceLocation &Loc) {
3588  switch (Tok.getKind()) {
3589  default:
3590  // Identifiers and keywords have identifier info attached.
3591  if (!Tok.isAnnotation()) {
3592  if (IdentifierInfo *II = Tok.getIdentifierInfo()) {
3593  Loc = ConsumeToken();
3594  return II;
3595  }
3596  }
3597  return nullptr;
3598 
3599  case tok::ampamp: // 'and'
3600  case tok::pipe: // 'bitor'
3601  case tok::pipepipe: // 'or'
3602  case tok::caret: // 'xor'
3603  case tok::tilde: // 'compl'
3604  case tok::amp: // 'bitand'
3605  case tok::ampequal: // 'and_eq'
3606  case tok::pipeequal: // 'or_eq'
3607  case tok::caretequal: // 'xor_eq'
3608  case tok::exclaim: // 'not'
3609  case tok::exclaimequal: // 'not_eq'
3610  // Alternative tokens do not have identifier info, but their spelling
3611  // starts with an alphabetical character.
3612  SmallString<8> SpellingBuf;
3613  SourceLocation SpellingLoc =
3615  StringRef Spelling = PP.getSpelling(SpellingLoc, SpellingBuf);
3616  if (isLetter(Spelling[0])) {
3617  Loc = ConsumeToken();
3618  return &PP.getIdentifierTable().get(Spelling);
3619  }
3620  return nullptr;
3621  }
3622 }
3623 
3625  IdentifierInfo *ScopeName) {
3626  switch (AttributeList::getKind(AttrName, ScopeName,
3628  case AttributeList::AT_CarriesDependency:
3629  case AttributeList::AT_Deprecated:
3630  case AttributeList::AT_FallThrough:
3631  case AttributeList::AT_CXX11NoReturn:
3632  return true;
3633 
3634  default:
3635  return false;
3636  }
3637 }
3638 
3639 /// ParseCXX11AttributeArgs -- Parse a C++11 attribute-argument-clause.
3640 ///
3641 /// [C++11] attribute-argument-clause:
3642 /// '(' balanced-token-seq ')'
3643 ///
3644 /// [C++11] balanced-token-seq:
3645 /// balanced-token
3646 /// balanced-token-seq balanced-token
3647 ///
3648 /// [C++11] balanced-token:
3649 /// '(' balanced-token-seq ')'
3650 /// '[' balanced-token-seq ']'
3651 /// '{' balanced-token-seq '}'
3652 /// any token but '(', ')', '[', ']', '{', or '}'
3653 bool Parser::ParseCXX11AttributeArgs(IdentifierInfo *AttrName,
3654  SourceLocation AttrNameLoc,
3655  ParsedAttributes &Attrs,
3656  SourceLocation *EndLoc,
3657  IdentifierInfo *ScopeName,
3658  SourceLocation ScopeLoc) {
3659  assert(Tok.is(tok::l_paren) && "Not a C++11 attribute argument list");
3660  SourceLocation LParenLoc = Tok.getLocation();
3661 
3662  // If the attribute isn't known, we will not attempt to parse any
3663  // arguments.
3664  if (!hasAttribute(AttrSyntax::CXX, ScopeName, AttrName,
3665  getTargetInfo(), getLangOpts())) {
3666  // Eat the left paren, then skip to the ending right paren.
3667  ConsumeParen();
3668  SkipUntil(tok::r_paren);
3669  return false;
3670  }
3671 
3672  if (ScopeName && ScopeName->getName() == "gnu")
3673  // GNU-scoped attributes have some special cases to handle GNU-specific
3674  // behaviors.
3675  ParseGNUAttributeArgs(AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
3676  ScopeLoc, AttributeList::AS_CXX11, nullptr);
3677  else {
3678  unsigned NumArgs =
3679  ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, EndLoc,
3680  ScopeName, ScopeLoc, AttributeList::AS_CXX11);
3681 
3682  const AttributeList *Attr = Attrs.getList();
3683  if (Attr && IsBuiltInOrStandardCXX11Attribute(AttrName, ScopeName)) {
3684  // If the attribute is a standard or built-in attribute and we are
3685  // parsing an argument list, we need to determine whether this attribute
3686  // was allowed to have an argument list (such as [[deprecated]]), and how
3687  // many arguments were parsed (so we can diagnose on [[deprecated()]]).
3688  if (Attr->getMaxArgs() && !NumArgs) {
3689  // The attribute was allowed to have arguments, but none were provided
3690  // even though the attribute parsed successfully. This is an error.
3691  Diag(LParenLoc, diag::err_attribute_requires_arguments) << AttrName;
3692  } else if (!Attr->getMaxArgs()) {
3693  // The attribute parsed successfully, but was not allowed to have any
3694  // arguments. It doesn't matter whether any were provided -- the
3695  // presence of the argument list (even if empty) is diagnosed.
3696  Diag(LParenLoc, diag::err_cxx11_attribute_forbids_arguments)
3697  << AttrName
3698  << FixItHint::CreateRemoval(SourceRange(LParenLoc, *EndLoc));
3699  }
3700  }
3701  }
3702  return true;
3703 }
3704 
3705 /// ParseCXX11AttributeSpecifier - Parse a C++11 attribute-specifier.
3706 ///
3707 /// [C++11] attribute-specifier:
3708 /// '[' '[' attribute-list ']' ']'
3709 /// alignment-specifier
3710 ///
3711 /// [C++11] attribute-list:
3712 /// attribute[opt]
3713 /// attribute-list ',' attribute[opt]
3714 /// attribute '...'
3715 /// attribute-list ',' attribute '...'
3716 ///
3717 /// [C++11] attribute:
3718 /// attribute-token attribute-argument-clause[opt]
3719 ///
3720 /// [C++11] attribute-token:
3721 /// identifier
3722 /// attribute-scoped-token
3723 ///
3724 /// [C++11] attribute-scoped-token:
3725 /// attribute-namespace '::' identifier
3726 ///
3727 /// [C++11] attribute-namespace:
3728 /// identifier
3729 void Parser::ParseCXX11AttributeSpecifier(ParsedAttributes &attrs,
3730  SourceLocation *endLoc) {
3731  if (Tok.is(tok::kw_alignas)) {
3732  Diag(Tok.getLocation(), diag::warn_cxx98_compat_alignas);
3733  ParseAlignmentSpecifier(attrs, endLoc);
3734  return;
3735  }
3736 
3737  assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square)
3738  && "Not a C++11 attribute list");
3739 
3740  Diag(Tok.getLocation(), diag::warn_cxx98_compat_attribute);
3741 
3742  ConsumeBracket();
3743  ConsumeBracket();
3744 
3745  llvm::SmallDenseMap<IdentifierInfo*, SourceLocation, 4> SeenAttrs;
3746 
3747  while (Tok.isNot(tok::r_square)) {
3748  // attribute not present
3749  if (TryConsumeToken(tok::comma))
3750  continue;
3751 
3752  SourceLocation ScopeLoc, AttrLoc;
3753  IdentifierInfo *ScopeName = nullptr, *AttrName = nullptr;
3754 
3755  AttrName = TryParseCXX11AttributeIdentifier(AttrLoc);
3756  if (!AttrName)
3757  // Break out to the "expected ']'" diagnostic.
3758  break;
3759 
3760  // scoped attribute
3761  if (TryConsumeToken(tok::coloncolon)) {
3762  ScopeName = AttrName;
3763  ScopeLoc = AttrLoc;
3764 
3765  AttrName = TryParseCXX11AttributeIdentifier(AttrLoc);
3766  if (!AttrName) {
3767  Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
3768  SkipUntil(tok::r_square, tok::comma, StopAtSemi | StopBeforeMatch);
3769  continue;
3770  }
3771  }
3772 
3773  bool StandardAttr = IsBuiltInOrStandardCXX11Attribute(AttrName, ScopeName);
3774  bool AttrParsed = false;
3775 
3776  if (StandardAttr &&
3777  !SeenAttrs.insert(std::make_pair(AttrName, AttrLoc)).second)
3778  Diag(AttrLoc, diag::err_cxx11_attribute_repeated)
3779  << AttrName << SourceRange(SeenAttrs[AttrName]);
3780 
3781  // Parse attribute arguments
3782  if (Tok.is(tok::l_paren))
3783  AttrParsed = ParseCXX11AttributeArgs(AttrName, AttrLoc, attrs, endLoc,
3784  ScopeName, ScopeLoc);
3785 
3786  if (!AttrParsed)
3787  attrs.addNew(AttrName,
3788  SourceRange(ScopeLoc.isValid() ? ScopeLoc : AttrLoc,
3789  AttrLoc),
3790  ScopeName, ScopeLoc, nullptr, 0, AttributeList::AS_CXX11);
3791 
3792  if (TryConsumeToken(tok::ellipsis))
3793  Diag(Tok, diag::err_cxx11_attribute_forbids_ellipsis)
3794  << AttrName->getName();
3795  }
3796 
3797  if (ExpectAndConsume(tok::r_square))
3798  SkipUntil(tok::r_square);
3799  if (endLoc)
3800  *endLoc = Tok.getLocation();
3801  if (ExpectAndConsume(tok::r_square))
3802  SkipUntil(tok::r_square);
3803 }
3804 
3805 /// ParseCXX11Attributes - Parse a C++11 attribute-specifier-seq.
3806 ///
3807 /// attribute-specifier-seq:
3808 /// attribute-specifier-seq[opt] attribute-specifier
3809 void Parser::ParseCXX11Attributes(ParsedAttributesWithRange &attrs,
3810  SourceLocation *endLoc) {
3811  assert(getLangOpts().CPlusPlus11);
3812 
3813  SourceLocation StartLoc = Tok.getLocation(), Loc;
3814  if (!endLoc)
3815  endLoc = &Loc;
3816 
3817  do {
3818  ParseCXX11AttributeSpecifier(attrs, endLoc);
3819  } while (isCXX11AttributeSpecifier());
3820 
3821  attrs.Range = SourceRange(StartLoc, *endLoc);
3822 }
3823 
3824 void Parser::DiagnoseAndSkipCXX11Attributes() {
3825  // Start and end location of an attribute or an attribute list.
3826  SourceLocation StartLoc = Tok.getLocation();
3827  SourceLocation EndLoc = SkipCXX11Attributes();
3828 
3829  if (EndLoc.isValid()) {
3830  SourceRange Range(StartLoc, EndLoc);
3831  Diag(StartLoc, diag::err_attributes_not_allowed)
3832  << Range;
3833  }
3834 }
3835 
3836 SourceLocation Parser::SkipCXX11Attributes() {
3837  SourceLocation EndLoc;
3838 
3839  if (!isCXX11AttributeSpecifier())
3840  return EndLoc;
3841 
3842  do {
3843  if (Tok.is(tok::l_square)) {
3844  BalancedDelimiterTracker T(*this, tok::l_square);
3845  T.consumeOpen();
3846  T.skipToEnd();
3847  EndLoc = T.getCloseLocation();
3848  } else {
3849  assert(Tok.is(tok::kw_alignas) && "not an attribute specifier");
3850  ConsumeToken();
3851  BalancedDelimiterTracker T(*this, tok::l_paren);
3852  if (!T.consumeOpen())
3853  T.skipToEnd();
3854  EndLoc = T.getCloseLocation();
3855  }
3856  } while (isCXX11AttributeSpecifier());
3857 
3858  return EndLoc;
3859 }
3860 
3861 /// ParseMicrosoftAttributes - Parse Microsoft attributes [Attr]
3862 ///
3863 /// [MS] ms-attribute:
3864 /// '[' token-seq ']'
3865 ///
3866 /// [MS] ms-attribute-seq:
3867 /// ms-attribute[opt]
3868 /// ms-attribute ms-attribute-seq
3869 void Parser::ParseMicrosoftAttributes(ParsedAttributes &attrs,
3870  SourceLocation *endLoc) {
3871  assert(Tok.is(tok::l_square) && "Not a Microsoft attribute list");
3872 
3873  do {
3874  // FIXME: If this is actually a C++11 attribute, parse it as one.
3875  BalancedDelimiterTracker T(*this, tok::l_square);
3876  T.consumeOpen();
3877  SkipUntil(tok::r_square, StopAtSemi | StopBeforeMatch);
3878  T.consumeClose();
3879  if (endLoc)
3880  *endLoc = T.getCloseLocation();
3881  } while (Tok.is(tok::l_square));
3882 }
3883 
3884 void Parser::ParseMicrosoftIfExistsClassDeclaration(DeclSpec::TST TagType,
3885  AccessSpecifier& CurAS) {
3886  IfExistsCondition Result;
3887  if (ParseMicrosoftIfExistsCondition(Result))
3888  return;
3889 
3890  BalancedDelimiterTracker Braces(*this, tok::l_brace);
3891  if (Braces.consumeOpen()) {
3892  Diag(Tok, diag::err_expected) << tok::l_brace;
3893  return;
3894  }
3895 
3896  switch (Result.Behavior) {
3897  case IEB_Parse:
3898  // Parse the declarations below.
3899  break;
3900 
3901  case IEB_Dependent:
3902  Diag(Result.KeywordLoc, diag::warn_microsoft_dependent_exists)
3903  << Result.IsIfExists;
3904  // Fall through to skip.
3905 
3906  case IEB_Skip:
3907  Braces.skipToEnd();
3908  return;
3909  }
3910 
3911  while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
3912  // __if_exists, __if_not_exists can nest.
3913  if (Tok.isOneOf(tok::kw___if_exists, tok::kw___if_not_exists)) {
3914  ParseMicrosoftIfExistsClassDeclaration((DeclSpec::TST)TagType, CurAS);
3915  continue;
3916  }
3917 
3918  // Check for extraneous top-level semicolon.
3919  if (Tok.is(tok::semi)) {
3920  ConsumeExtraSemi(InsideStruct, TagType);
3921  continue;
3922  }
3923 
3924  AccessSpecifier AS = getAccessSpecifierIfPresent();
3925  if (AS != AS_none) {
3926  // Current token is a C++ access specifier.
3927  CurAS = AS;
3928  SourceLocation ASLoc = Tok.getLocation();
3929  ConsumeToken();
3930  if (Tok.is(tok::colon))
3931  Actions.ActOnAccessSpecifier(AS, ASLoc, Tok.getLocation());
3932  else
3933  Diag(Tok, diag::err_expected) << tok::colon;
3934  ConsumeToken();
3935  continue;
3936  }
3937 
3938  // Parse all the comma separated declarators.
3939  ParseCXXClassMemberDeclaration(CurAS, nullptr);
3940  }
3941 
3942  Braces.consumeClose();
3943 }
MutableArrayRef< TemplateParameterList * > MultiTemplateParamsArg
Definition: Ownership.h:265
bool isAtStartOfLine() const
isAtStartOfLine - Return true if this token is at the start of a line.
Definition: Token.h:261
SourceManager & getSourceManager() const
Definition: Preprocessor.h:687
SourceLocation getCloseLocation() const
Defines the clang::ASTContext interface.
void setConstructorName(ParsedType ClassType, SourceLocation ClassNameLoc, SourceLocation EndLoc)
Specify that this unqualified-id was parsed as a constructor name.
Definition: DeclSpec.h:1037
IdKind getKind() const
Determine what kind of name we have.
Definition: DeclSpec.h:971
DeclaratorChunk::FunctionTypeInfo & getFunctionTypeInfo()
getFunctionTypeInfo - Retrieves the function type info object (looking through parentheses).
Definition: DeclSpec.h:2076
TypeResult ActOnDependentTag(Scope *S, unsigned TagSpec, TagUseKind TUK, const CXXScopeSpec &SS, IdentifierInfo *Name, SourceLocation TagLoc, SourceLocation NameLoc)
DeclResult ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, SourceLocation KWLoc, SourceLocation ModulePrivateLoc, TemplateIdAnnotation &TemplateId, AttributeList *Attr, MultiTemplateParamsArg TemplateParameterLists, SkipBodyInfo *SkipBody=nullptr)
no exception specification
ExprResult ParseExpression(TypeCastState isTypeCast=NotTypeCast)
Simple precedence-based parser for binary/ternary operators.
Definition: ParseExpr.cpp:120
SourceLocation getRestrictSpecLoc() const
Definition: DeclSpec.h:536
TemplateParameterList * ActOnTemplateParameterList(unsigned Depth, SourceLocation ExportLoc, SourceLocation TemplateLoc, SourceLocation LAngleLoc, ArrayRef< Decl * > Params, SourceLocation RAngleLoc)
ActOnTemplateParameterList - Builds a TemplateParameterList that contains the template parameters in ...
bool isInvalid() const
Definition: Ownership.h:159
void clear()
Reset the contents of this Declarator.
Definition: DeclSpec.h:1771
SourceLocation getConstSpecLoc() const
Definition: DeclSpec.h:535
SourceRange getSourceRange() const LLVM_READONLY
Return the source range that covers this unqualified-id.
Definition: DeclSpec.h:1077
void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace)
ActOnFinishNamespaceDef - This callback is called after a namespace is exited.
SourceLocation StartLocation
The location of the first token that describes this unqualified-id, which will be the location of the...
Definition: DeclSpec.h:948
IdentifierInfo * Name
FIXME: Temporarily stores the name of a specialization.
const LangOptions & getLangOpts() const
Definition: Parse/Parser.h:244
SourceLocation TemplateNameLoc
TemplateNameLoc - The location of the template name within the source.
bool isArrayOfUnknownBound() const
isArrayOfUnknownBound - This method returns true if the declarator is a declarator for an array of un...
Definition: DeclSpec.h:2035
SourceLocation getSpellingLoc(SourceLocation Loc) const
Given a SourceLocation object, return the spelling location referenced by the ID. ...
CachedTokens * DefaultArgTokens
DefaultArgTokens - When the parameter's default argument cannot be parsed immediately (because it occ...
Definition: DeclSpec.h:1175
const Scope * getParent() const
getParent - Return the scope that this is nested in.
Definition: Scope.h:215
static CharSourceRange getTokenRange(SourceRange R)
The name refers to a dependent template name.
Definition: TemplateKinds.h:38
ActionResult< Expr * > ExprResult
Definition: Ownership.h:252
The current expression is potentially evaluated at run time, which means that code may be generated t...
Definition: Sema.h:781
bool hasPlaceholderType() const
Returns whether this expression has a placeholder type.
Definition: Expr.h:462
void CodeCompleteConstructorInitializer(Decl *Constructor, ArrayRef< CXXCtorInitializer * > Initializers)
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:77
static LLVM_READONLY bool isLetter(unsigned char c)
Return true if this character is an ASCII letter: [a-zA-Z].
Definition: CharInfo.h:112
RAII object used to inform the actions that we're currently parsing a declaration.
void CodeCompleteUsing(Scope *S)
A RAII object used to temporarily suppress access-like checking.
Defines the C++ template declaration subclasses.
SCS getStorageClassSpec() const
Definition: DeclSpec.h:441
void ActOnBaseSpecifiers(Decl *ClassDecl, MutableArrayRef< CXXBaseSpecifier * > Bases)
ActOnBaseSpecifiers - Attach the given base specifiers to the class, after checking whether there are...
PtrTy get() const
Definition: Ownership.h:163
The base class of the type hierarchy.
Definition: Type.h:1249
bool TryAnnotateCXXScopeToken(bool EnteringContext=false)
TryAnnotateScopeToken - Like TryAnnotateTypeOrScopeToken but only annotates C++ scope specifiers and ...
This indicates that the scope corresponds to a function, which means that labels are set here...
Definition: Scope.h:45
std::unique_ptr< llvm::MemoryBuffer > Buffer
Declaration of a variable template.
static FixItHint CreateInsertionFromRange(SourceLocation InsertionLoc, CharSourceRange FromRange, bool BeforePreviousInsertions=false)
Create a code modification hint that inserts the given code from FromRange at a specific location...
Definition: Diagnostic.h:91
static const char * getSpecifierName(DeclSpec::TST T, const PrintingPolicy &Policy)
Turn a type-specifier-type into a string like "_Bool" or "union".
Definition: DeclSpec.cpp:444
static const char * getSpecifierName(Specifier VS)
Definition: DeclSpec.cpp:1267
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:90
TemplateNameKind Kind
The kind of template that Template refers to.
Wrapper for void* pointer.
Definition: Ownership.h:45
Parser - This implements a parser for the C family of languages.
Definition: Parse/Parser.h:56
void SetIdentifier(IdentifierInfo *Id, SourceLocation IdLoc)
Set the name of this declarator to be the given identifier.
Definition: DeclSpec.h:1960
unsigned getRawEncoding() const
When a SourceLocation itself cannot be used, this returns an (opaque) 32-bit integer encoding for it...
void ActOnFinishCXXNonNestedClass(Decl *D)
RAII object that enters a new expression evaluation context.
Definition: Sema.h:9238
void EnterToken(const Token &Tok)
Enters a token in the token stream to be lexed next.
static const TST TST_underlyingType
Definition: DeclSpec.h:297
Information about one declarator, including the parsed type information and the identifier.
Definition: DeclSpec.h:1608
void setTypeofParensRange(SourceRange range)
Definition: DeclSpec.h:512
TypeSpecifierType
Specifies the kind of type.
Definition: Specifiers.h:45
void ActOnTagFinishSkippedDefinition(SkippedDefinitionContext Context)
Definition: SemaDecl.cpp:1097
static const TST TST_interface
Definition: DeclSpec.h:290
Like System, but searched after the system directories.
void setBegin(SourceLocation b)
Describes how types, statements, expressions, and declarations should be printed. ...
Definition: PrettyPrinter.h:35
friend class ObjCDeclContextSwitch
Definition: Parse/Parser.h:60
ColonProtectionRAIIObject - This sets the Parser::ColonIsSacred bool and restores it when destroyed...
StringRef getSpelling(SourceLocation loc, SmallVectorImpl< char > &buffer, bool *invalid=nullptr) const
Return the 'spelling' of the token at the given location; does not go up to the spelling location or ...
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: Parse/Parser.h:866
void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto)
Definition: SemaDecl.cpp:9663
Information about a template-id annotation token.
Decl * ActOnAliasDeclaration(Scope *CurScope, AccessSpecifier AS, MultiTemplateParamsArg TemplateParams, SourceLocation UsingLoc, UnqualifiedId &Name, AttributeList *AttrList, TypeResult Type, Decl *DeclFromDeclSpec)
const Token & NextToken()
NextToken - This peeks ahead one token and returns it without consuming it.
Definition: Parse/Parser.h:551
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset=0)
Computes the source location just past the end of the token at this source location.
bool TryConsumeToken(tok::TokenKind Expected)
Definition: Parse/Parser.h:293
__ptr16, alignas(...), etc.
Definition: AttributeList.h:83
TemplateIdAnnotation * TemplateId
When Kind == IK_TemplateId or IK_ConstructorTemplateId, the template-id annotation that contains the ...
Definition: DeclSpec.h:942
One of these records is kept for each identifier that is lexed.
Decl * ActOnNamespaceAliasDef(Scope *CurScope, SourceLocation NamespaceLoc, SourceLocation AliasLoc, IdentifierInfo *Alias, CXXScopeSpec &SS, SourceLocation IdentLoc, IdentifierInfo *Ident)
bool isUnset() const
Definition: Ownership.h:161
OpaquePtr< QualType > ParsedType
An opaque type for threading parsed type information through the parser.
Definition: Ownership.h:233
Decl * ActOnUsingDeclaration(Scope *CurScope, AccessSpecifier AS, bool HasUsingKeyword, SourceLocation UsingLoc, CXXScopeSpec &SS, UnqualifiedId &Name, AttributeList *AttrList, bool HasTypenameKeyword, SourceLocation TypenameLoc)
class LLVM_ALIGNAS(8) DependentTemplateSpecializationType const IdentifierInfo * Name
Represents a template specialization type whose template cannot be resolved, e.g. ...
Definition: Type.h:4381
AttributeList * getList() const
Copy initialization.
Definition: Specifiers.h:223
void ActOnTagStartDefinition(Scope *S, Decl *TagDecl)
ActOnTagStartDefinition - Invoked when we have entered the scope of a tag's definition (e...
Definition: SemaDecl.cpp:12709
BaseResult ActOnBaseSpecifier(Decl *classdecl, SourceRange SpecifierRange, ParsedAttributes &Attrs, bool Virtual, AccessSpecifier Access, ParsedType basetype, SourceLocation BaseLoc, SourceLocation EllipsisLoc)
ActOnBaseSpecifier - Parsed a base specifier.
static const TST TST_class
Definition: DeclSpec.h:291
DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType=nullptr)
Definition: SemaDecl.cpp:53
static const TST TST_error
Definition: DeclSpec.h:302
Token - This structure provides full information about a lexed token.
Definition: Token.h:37
void setKind(tok::TokenKind K)
Definition: Token.h:91
SourceLocation getFirstLocation() const
Definition: DeclSpec.h:2281
RAII class that helps handle the parsing of an open/close delimiter pair, such as braces { ...
bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, SourceLocation IILoc, Scope *S, const CXXScopeSpec *SS, TemplateTy &SuggestedTemplate, TemplateNameKind &SuggestedKind)
void ClearStorageClassSpecs()
Definition: DeclSpec.h:455
Decl * ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, SourceLocation KWLoc, CXXScopeSpec &SS, IdentifierInfo *Name, SourceLocation NameLoc, AttributeList *Attr, AccessSpecifier AS, SourceLocation ModulePrivateLoc, MultiTemplateParamsArg TemplateParameterLists, bool &OwnedDecl, bool &IsDependent, SourceLocation ScopedEnumKWLoc, bool ScopedEnumUsesClassTag, TypeResult UnderlyingType, bool IsTypeSpecifier, SkipBodyInfo *SkipBody=nullptr)
This is invoked when we see 'struct foo' or 'struct {'.
Definition: SemaDecl.cpp:11850
const TargetInfo & getTargetInfo() const
Definition: Parse/Parser.h:245
ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, Expr *SubExpr)
Definition: SemaExpr.cpp:14020
void setExternInLinkageSpec(bool Value)
Definition: DeclSpec.h:446
Represents a C++ unqualified-id that has been parsed.
Definition: DeclSpec.h:874
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
ParsedType getTypeName(const IdentifierInfo &II, SourceLocation NameLoc, Scope *S, CXXScopeSpec *SS=nullptr, bool isClassName=false, bool HasTrailingDot=false, ParsedType ObjectType=ParsedType(), bool IsCtorOrDtorName=false, bool WantNontrivialTypeSourceInfo=false, IdentifierInfo **CorrectedII=nullptr)
If the identifier refers to a type name within this scope, return the declaration of that type...
Definition: SemaDecl.cpp:241
Microsoft throw(...) extension.
SmallVector< CharSourceRange, 8 > Ranges
Definition: Format.cpp:1715
void takeAllFrom(ParsedAttributes &attrs)
ParsedTemplateArgument * getTemplateArgs()
Retrieves a pointer to the template arguments.
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:38
SourceLocation getEndLoc() const
Definition: DeclSpec.h:73
Represents a C++ nested-name-specifier or a global scope specifier.
Definition: DeclSpec.h:63
int hasAttribute(AttrSyntax Syntax, const IdentifierInfo *Scope, const IdentifierInfo *Attr, const TargetInfo &Target, const LangOptions &LangOpts)
Return the version number associated with the attribute if we recognize and implement the attribute s...
Definition: Attributes.cpp:6
tok::TokenKind getKind() const
Definition: Token.h:90
Decl * ActOnStartLinkageSpecification(Scope *S, SourceLocation ExternLoc, Expr *LangStr, SourceLocation LBraceLoc)
ActOnStartLinkageSpecification - Parsed the beginning of a C++ linkage specification, including the language and (if present) the '{'.
SourceRange getSourceRange() const LLVM_READONLY
Definition: DeclSpec.h:496
detail::InMemoryDirectory::const_iterator I
bool isInvalid() const
void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, bool IncludeCXX11Attributes=true)
ProcessDeclAttributeList - Apply all the decl attributes in the specified attribute list to the speci...
SourceRange getRange() const
Definition: DeclSpec.h:68
SourceLocation TemplateKWLoc
TemplateKWLoc - The location of the template keyword within the source.
ParsingClassState PushParsingClass()
Definition: Sema.h:3530
SourceLocation LAngleLoc
The location of the '<' before the template argument list.
AnnotatingParser & P
bool isFunctionDeclarator(unsigned &idx) const
isFunctionDeclarator - This method returns true if the declarator is a function declarator (looking t...
Definition: DeclSpec.h:2045
A little helper class used to produce diagnostics.
Definition: Diagnostic.h:866
TST getTypeSpecType() const
Definition: DeclSpec.h:473
void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, bool TypeMayContainAuto)
AddInitializerToDecl - Adds the initializer Init to the declaration dcl.
Definition: SemaDecl.cpp:9194
Kind getKind() const
SourceLocation getModulePrivateSpecLoc() const
Definition: DeclSpec.h:696
void ActOnFinishCXXMemberDecls()
Perform any semantic analysis which needs to be delayed until all pending class member declarations h...
A class for parsing a declarator.
void SetRangeStart(SourceLocation Loc)
Definition: DeclSpec.h:599
SourceLocation getFriendSpecLoc() const
Definition: DeclSpec.h:693
unsigned NumParams
NumParams - This is the number of formal parameters specified by the declarator.
Definition: DeclSpec.h:1233
ASTContext * Context
TypeResult ParseTypeName(SourceRange *Range=nullptr, Declarator::TheContext Context=Declarator::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:43
unsigned getTypeQualifiers() const
getTypeQualifiers - Return a set of TQs.
Definition: DeclSpec.h:534
Decl * ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, Expr *AssertExpr, Expr *AssertMessageExpr, SourceLocation RParenLoc)
Expr - This represents one expression.
Definition: Expr.h:104
StringRef getName() const
Return the actual identifier string.
static bool IsBuiltInOrStandardCXX11Attribute(IdentifierInfo *AttrName, IdentifierInfo *ScopeName)
Represents a character-granular source range.
bool isDeclarationOfFunction() const
Determine whether the declaration that will be produced from this declaration will be a function...
Definition: DeclSpec.cpp:261
void AnnotateCachedTokens(const Token &Tok)
We notify the Preprocessor that if it is caching tokens (because backtrack is enabled) it should repl...
This file defines the classes used to store parsed information about declaration-specifiers and decla...
void SkipMalformedDecl()
SkipMalformedDecl - Read tokens until we get to some likely good stopping point for skipping past a s...
Definition: ParseDecl.cpp:1612
TypeResult ActOnTypeName(Scope *S, Declarator &D)
Definition: SemaType.cpp:4963
void RevertCachedTokens(unsigned N)
When backtracking is enabled and tokens are cached, this allows to revert a specific number of tokens...
void setInvalidDecl(bool Invalid=true)
setInvalidDecl - Indicates the Decl had a semantic error.
Definition: DeclBase.cpp:111
OpaquePtr< TemplateName > TemplateTy
Definition: Parse/Parser.h:261
Defines an enumeration for C++ overloaded operators.
void setAsmLabel(Expr *E)
Definition: DeclSpec.h:2187
SourceLocation getVolatileSpecLoc() const
Definition: DeclSpec.h:537
bool ActOnAccessSpecifier(AccessSpecifier Access, SourceLocation ASLoc, SourceLocation ColonLoc, AttributeList *Attrs=nullptr)
ActOnAccessSpecifier - Parsed an access specifier followed by a colon.
Represents a C++ template name within the type system.
Definition: TemplateName.h:175
bool isPastIdentifier() const
isPastIdentifier - Return true if we have parsed beyond the point where the
Definition: DeclSpec.h:1942
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:124
CachedTokens * ExceptionSpecTokens
Pointer to the cached tokens for an exception-specification that has not yet been parsed...
Definition: DeclSpec.h:1286
TemplateNameKind
Specifies the kind of template name that an identifier refers to.
Definition: TemplateKinds.h:21
bool isNot(tok::TokenKind K) const
Definition: Token.h:96
InClassInitStyle
In-class initialization styles for non-static data members.
Definition: Specifiers.h:221
ParsedType getInheritingConstructorName(CXXScopeSpec &SS, SourceLocation NameLoc, IdentifierInfo &Name)
Handle the result of the special case name lookup for inheriting constructor declarations.
Definition: SemaExprCXX.cpp:48
ExceptionSpecificationType getExceptionSpecType() const
Get the type of exception specification this function has.
Definition: DeclSpec.h:1380
class LLVM_ALIGNAS(8) TemplateSpecializationType unsigned NumArgs
Represents a type template specialization; the template must be a class template, a type alias templa...
Definition: Type.h:3988
The result type of a method or function.
void CodeCompleteNamespaceDecl(Scope *S)
SourceLocation getAnnotationEndLoc() const
Definition: Token.h:138
ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, SourceLocation EllipsisLoc)
Invoked when parsing a template argument followed by an ellipsis, which creates a pack expansion...
OpaquePtr< DeclGroupRef > DeclGroupPtrTy
Definition: Parse/Parser.h:260
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:545
PrettyDeclStackTraceEntry - If a crash occurs in the parser while parsing something related to a decl...
void ActOnFinishCXXMemberSpecification(Scope *S, SourceLocation RLoc, Decl *TagDecl, SourceLocation LBrac, SourceLocation RBrac, AttributeList *AttrList)
NestedNameSpecifier * getScopeRep() const
Retrieve the representation of the nested-name-specifier.
Definition: DeclSpec.h:76
A class for parsing a DeclSpec.
NamespaceDecl * getAsNamespace() const
Retrieve the namespace stored in this nested name specifier.
ExprResult ActOnDecltypeExpression(Expr *E)
Process the expression contained within a decltype.
Kind
Stop skipping at semicolon.
Definition: Parse/Parser.h:846
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:145
SmallVectorImpl< AnnotatedLine * >::const_iterator Next
bool ParseTopLevelDecl()
Definition: Parse/Parser.h:276
Encodes a location in the source.
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
Decl * ActOnFinishLinkageSpecification(Scope *S, Decl *LinkageSpec, SourceLocation RBraceLoc)
ActOnFinishLinkageSpecification - Complete the definition of the C++ linkage specification LinkageSpe...
const TemplateArgument * iterator
Definition: Type.h:4070
Specifier getLastSpecifier() const
Definition: DeclSpec.h:2283
Expr * getRepAsExpr() const
Definition: DeclSpec.h:489
void FinalizeDeclaration(Decl *D)
FinalizeDeclaration - called by ParseDeclarationAfterDeclarator to perform any semantic actions neces...
Definition: SemaDecl.cpp:10142
bool isValid() const
Return true if this is a valid SourceLocation object.
TagDecl - Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:2644
bool isValid() const
ASTContext & getASTContext() const
Definition: Sema.h:1048
static const TST TST_union
Definition: DeclSpec.h:288
void setAnnotationEndLoc(SourceLocation L)
Definition: Token.h:142
IdentifierTable & getIdentifierTable()
Definition: Preprocessor.h:690
Scope * getCurScope() const
Definition: Parse/Parser.h:251
bool isObjCAtKeyword(tok::ObjCKeywordKind objcKey) const
Return true if we have an ObjC keyword identifier.
Definition: Lexer.cpp:36
ExtensionRAIIObject - This saves the state of extension warnings when constructed and disables them...
bool isInvalid() const
An error occurred during parsing of the scope specifier.
Definition: DeclSpec.h:194
bool isTemplateParamScope() const
isTemplateParamScope - Return true if this scope is a C++ template parameter scope.
Definition: Scope.h:362
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:25
Decl * ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, unsigned TagSpec, SourceLocation TagLoc, CXXScopeSpec &SS, IdentifierInfo *Name, SourceLocation NameLoc, AttributeList *Attr, MultiTemplateParamsArg TempParamLists)
Handle a friend tag declaration where the scope specifier was templated.
Direct list-initialization.
Definition: Specifiers.h:224
Represents a C++11 virt-specifier-seq.
Definition: DeclSpec.h:2254
NamespaceAliasDecl * getAsNamespaceAlias() const
Retrieve the namespace alias stored in this nested name specifier.
SourceLocation getBegin() const
SourceLocation getBeginLoc() const
Definition: DeclSpec.h:72
FunctionDefinitionKind
Described the kind of function definition (if any) provided for a function.
Definition: DeclSpec.h:1589
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:95
void ActOnMemInitializers(Decl *ConstructorDecl, SourceLocation ColonLoc, ArrayRef< CXXCtorInitializer * > MemInits, bool AnyErrors)
ActOnMemInitializers - Handle the member initializers for a constructor.
bool ParseUnqualifiedId(CXXScopeSpec &SS, bool EnteringContext, bool AllowDestructorName, bool AllowConstructorName, ParsedType ObjectType, SourceLocation &TemplateKWLoc, UnqualifiedId &Result)
Parse a C++ unqualified-id (or a C identifier), which describes the name of an entity.
void setFunctionDefinitionKind(FunctionDefinitionKind Val)
Definition: DeclSpec.h:2215
Decl * ActOnUsingDirective(Scope *CurScope, SourceLocation UsingLoc, SourceLocation NamespcLoc, CXXScopeSpec &SS, SourceLocation IdentLoc, IdentifierInfo *NamespcName, AttributeList *AttrList)
bool containsPlaceholderType() const
Definition: DeclSpec.h:514
TypeResult ActOnTagTemplateIdType(TagUseKind TUK, TypeSpecifierType TagSpec, SourceLocation TagLoc, CXXScopeSpec &SS, SourceLocation TemplateKWLoc, TemplateTy TemplateD, SourceLocation TemplateLoc, SourceLocation LAngleLoc, ASTTemplateArgsPtr TemplateArgsIn, SourceLocation RAngleLoc)
Parsed an elaborated-type-specifier that refers to a template-id, such as class T::template apply<U>...
SourceLocation getOpenLocation() const
The scope of a struct/union/class definition.
Definition: Scope.h:63
bool isStr(const char(&Str)[StrLen]) const
Return true if this is the identifier for the specified string.
static const TST TST_decltype_auto
Definition: DeclSpec.h:296
bool isUnset() const
Definition: DeclSpec.h:2268
SmallVector< Token, 4 > CachedTokens
A set of tokens that has been cached for later parsing.
Definition: DeclSpec.h:1085
static const TST TST_decltype
Definition: DeclSpec.h:295
bool isFriendSpecified() const
Definition: DeclSpec.h:692
static void diagnoseDynamicExceptionSpecification(Parser &P, SourceRange Range, bool IsNoexcept)
CXXScopeSpec SS
The nested-name-specifier that precedes the template name.
SourceLocation RAngleLoc
The location of the '>' after the template argument list.
void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, SourceLocation RBraceLoc)
ActOnTagFinishDefinition - Invoked once we have finished parsing the definition of a tag (enumeration...
Definition: SemaDecl.cpp:12770
bool isInvalidDecl() const
Definition: DeclBase.h:509
void CodeCompleteTag(Scope *S, unsigned TagSpec)
bool hasTagDefinition() const
Definition: DeclSpec.cpp:351
static FixItHint CreateRemoval(CharSourceRange RemoveRange)
Create a code modification hint that removes the given source range.
Definition: Diagnostic.h:104
detail::InMemoryDirectory::const_iterator E
bool hasName() const
hasName - Whether this declarator has a name, which might be an identifier (accessible via getIdentif...
Definition: DeclSpec.h:1947
void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, SourceLocation FinalLoc, bool IsFinalSpelledSealed, SourceLocation LBraceLoc)
ActOnStartCXXMemberDeclarations - Invoked when we have parsed a C++ record definition's base-specifie...
Definition: SemaDecl.cpp:12733
The name refers to a template whose specialization produces a type.
Definition: TemplateKinds.h:30
void CodeCompleteNamespaceAliasDecl(Scope *S)
void CodeCompleteUsingDirective(Scope *S)
Decl * ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, SourceLocation NamespaceLoc, SourceLocation IdentLoc, IdentifierInfo *Ident, SourceLocation LBrace, AttributeList *AttrList, UsingDirectiveDecl *&UsingDecl)
ActOnStartNamespaceDef - This is called at the start of a namespace definition.
bool isNotEmpty() const
A scope specifier is present, but may be valid or invalid.
Definition: DeclSpec.h:191
bool isOneOf(tok::TokenKind K1, tok::TokenKind K2) const
Definition: Token.h:97
bool SetSpecifier(Specifier VS, SourceLocation Loc, const char *&PrevSpec)
Definition: DeclSpec.cpp:1243
bool TypeAlias
Whether this template specialization type is a substituted type alias.
Definition: Type.h:4005
void ActOnTagDefinitionError(Scope *S, Decl *TagDecl)
ActOnTagDefinitionError - Invoked when there was an unrecoverable error parsing the definition of a t...
Definition: SemaDecl.cpp:12814
void takeAttributesFrom(ParsedAttributes &attrs)
Definition: DeclSpec.h:744
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
bool isKnownToGCC() const
unsigned getMaxArgs() const
NamedDecl * ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, Declarator &D, MultiTemplateParamsArg TemplateParameterLists, Expr *BitfieldWidth, const VirtSpecifiers &VS, InClassInitStyle InitStyle)
ActOnCXXMemberDeclarator - This is invoked when a C++ class member declarator is parsed.
static const TST TST_typename
Definition: DeclSpec.h:292
void SetRangeEnd(SourceLocation Loc)
SetRangeEnd - Set the end of the source range to Loc, unless it's invalid.
Definition: DeclSpec.h:1755
DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, ArrayRef< Decl * > Group)
Definition: SemaDecl.cpp:10272
DeclResult ActOnExplicitInstantiation(Scope *S, SourceLocation ExternLoc, SourceLocation TemplateLoc, unsigned TagSpec, SourceLocation KWLoc, const CXXScopeSpec &SS, TemplateTy Template, SourceLocation TemplateNameLoc, SourceLocation LAngleLoc, ASTTemplateArgsPtr TemplateArgs, SourceLocation RAngleLoc, AttributeList *Attr)
ExceptionSpecificationType
The various types of exception specifications that exist in C++11.
ActionResult< ParsedType > TypeResult
Definition: Ownership.h:254
SourceLocation getLoc() const
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:78
A template-id, e.g., f<int>.
Definition: DeclSpec.h:897
SmallVector< TemplateParameterList *, 4 > TemplateParameterLists
Definition: Parse/Parser.h:263
CXXScopeSpec & getTypeSpecScope()
Definition: DeclSpec.h:493
AttributeList * addNew(IdentifierInfo *attrName, SourceRange attrRange, IdentifierInfo *scopeName, SourceLocation scopeLoc, ArgsUnion *args, unsigned numArgs, AttributeList::Syntax syntax, SourceLocation ellipsisLoc=SourceLocation())
Add attribute with expression arguments.
This is a scope that can contain a declaration.
Definition: Scope.h:57
bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, unsigned &DiagID, const PrintingPolicy &Policy)
Definition: DeclSpec.cpp:682
static ParsedType getTypeAnnotation(Token &Tok)
getTypeAnnotation - Read a parsed type out of an annotation token.
Definition: Parse/Parser.h:556
Decl * ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS)
ParsedFreeStandingDeclSpec - This method is invoked when a declspec with no declarator (e...
Definition: SemaDecl.cpp:3599
void getCXX11AttributeRanges(SmallVectorImpl< SourceRange > &Ranges)
Return a source range list of C++11 attributes associated with the declarator.
Definition: DeclSpec.h:2178
bool isCXX11Attribute() const
X
Add a minimal nested name specifier fixit hint to allow lookup of a tag name from an outer enclosing ...
Definition: SemaDecl.cpp:11761
ExprResult ParseConstantExpression(TypeCastState isTypeCast=NotTypeCast)
Definition: ParseExpr.cpp:197
Captures information about "declaration specifiers".
Definition: DeclSpec.h:228
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:1957
void setEnd(SourceLocation e)
SourceLocation ConsumeToken()
ConsumeToken - Consume the current 'peek token' and lex the next one.
Definition: Parse/Parser.h:285
void ActOnPureSpecifier(Decl *D, SourceLocation PureSpecLoc)
void PopParsingClass(ParsingClassState state)
Definition: Sema.h:3533
ExprResult CorrectDelayedTyposInExpr(Expr *E, VarDecl *InitDecl=nullptr, llvm::function_ref< ExprResult(Expr *)> Filter=[](Expr *E) -> ExprResult{return E;})
Process any TypoExprs in the given Expr and its children, generating diagnostics as appropriate and r...
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:115
void revertTokenIDToIdentifier()
Revert TokenID to tok::identifier; used for GNU libstdc++ 4.2 compatibility.
Defines the clang::TargetInfo interface.
void ExtendWithDeclSpec(const DeclSpec &DS)
ExtendWithDeclSpec - Extend the declarator source range to include the given declspec, unless its location is invalid.
Definition: DeclSpec.h:1762
ExprResult ExprError()
Definition: Ownership.h:267
MemInitResult ActOnMemInitializer(Decl *ConstructorD, Scope *S, CXXScopeSpec &SS, IdentifierInfo *MemberOrBase, ParsedType TemplateTypeTy, const DeclSpec &DS, SourceLocation IdLoc, SourceLocation LParenLoc, ArrayRef< Expr * > Args, SourceLocation RParenLoc, SourceLocation EllipsisLoc)
Handle a C++ member initializer using parentheses syntax.
static OpaquePtr make(PtrTy P)
Definition: Ownership.h:54
bool isSet() const
Deprecated.
Definition: DeclSpec.h:209
unsigned getLength() const
Definition: Token.h:127
The current expression and its subexpressions occur within an unevaluated operand (C++11 [expr]p7)...
Definition: Sema.h:766
static const TST TST_struct
Definition: DeclSpec.h:289
Annotates a diagnostic with some code that should be inserted, removed, or replaced to fix the proble...
Definition: Diagnostic.h:52
SkippedDefinitionContext ActOnTagStartSkippedDefinition(Scope *S, Decl *TD)
Invoked when we enter a tag definition that we're skipping.
Definition: SemaDecl.cpp:1083
void setLocation(SourceLocation L)
Definition: Token.h:132
AttributeList * getNext() const
A trivial tuple used to represent a source range.
SourceLocation getLocation() const
Definition: DeclBase.h:384
NamedDecl - This represents a decl with a name.
Definition: Decl.h:145
void setIdentifier(const IdentifierInfo *Id, SourceLocation IdLoc)
Specify that this unqualified-id was parsed as an identifier.
Definition: DeclSpec.h:978
bool SetTypeSpecError()
Definition: DeclSpec.cpp:763
Represents C++ using-directive.
Definition: DeclCXX.h:2546
unsigned NumArgs
NumArgs - The number of template arguments.
void SetRangeEnd(SourceLocation Loc)
Definition: DeclSpec.h:600
ParsedAttributes - A collection of parsed attributes.
SourceLocation ColonLoc
Location of ':'.
Definition: OpenMPClause.h:266
bool isAnnotation() const
Return true if this is any of tok::annot_* kind tokens.
Definition: Token.h:118
void setCommaLoc(SourceLocation CL)
Definition: DeclSpec.h:2209
No in-class initializer.
Definition: Specifiers.h:222
ParamInfo * Params
Params - This is a pointer to a new[]'d array of ParamInfo objects that describe the parameters speci...
Definition: DeclSpec.h:1272
Attr - This represents one attribute.
Definition: Attr.h:44
void startToken()
Reset all flags to cleared.
Definition: Token.h:169
ParsedTemplateTy Template
The declaration of the template corresponding to the template-name.
const DeclSpec & getDeclSpec() const
getDeclSpec - Return the declaration-specifier that this declarator was declared with.
Definition: DeclSpec.h:1712
AttributeList - Represents a syntactic attribute.
Definition: AttributeList.h:72
bool isBacktrackEnabled() const
True if EnableBacktrackAtThisPos() was called and caching of tokens is on.
Stop skipping at specified token, but don't skip the token itself.
Definition: Parse/Parser.h:848
NamedDecl * ActOnFriendFunctionDecl(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParams)
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:177
const AttributeList * getAttributes() const
Definition: DeclSpec.h:2162