clang  3.9.0
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 nullptr;
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 nullptr;
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 nullptr;
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 nullptr;
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, nullptr, /*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, nullptr, /*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, nullptr, /*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  nullptr, 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, nullptr, /*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(nullptr, IdLoc, SS, true, LAngleLoc,
1010  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 =
1041  Actions.getTypeName(*Id, IdLoc, getCurScope(), &SS, true, false, nullptr,
1042  /*IsCtorOrDtorName=*/false,
1043  /*NonTrivialTypeSourceInfo=*/true, &CorrectedII);
1044  if (!Type) {
1045  Diag(IdLoc, diag::err_expected_class_name);
1046  return true;
1047  }
1048 
1049  // Consume the identifier.
1050  EndLocation = IdLoc;
1051 
1052  // Fake up a Declarator to use with ActOnTypeName.
1053  DeclSpec DS(AttrFactory);
1054  DS.SetRangeStart(IdLoc);
1055  DS.SetRangeEnd(EndLocation);
1056  DS.getTypeSpecScope() = SS;
1057 
1058  const char *PrevSpec = nullptr;
1059  unsigned DiagID;
1060  DS.SetTypeSpecType(TST_typename, IdLoc, PrevSpec, DiagID, Type,
1061  Actions.getASTContext().getPrintingPolicy());
1062 
1063  Declarator DeclaratorInfo(DS, Declarator::TypeNameContext);
1064  return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
1065 }
1066 
1067 void Parser::ParseMicrosoftInheritanceClassAttributes(ParsedAttributes &attrs) {
1068  while (Tok.isOneOf(tok::kw___single_inheritance,
1069  tok::kw___multiple_inheritance,
1070  tok::kw___virtual_inheritance)) {
1071  IdentifierInfo *AttrName = Tok.getIdentifierInfo();
1072  SourceLocation AttrNameLoc = ConsumeToken();
1073  attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
1075  }
1076 }
1077 
1078 /// Determine whether the following tokens are valid after a type-specifier
1079 /// which could be a standalone declaration. This will conservatively return
1080 /// true if there's any doubt, and is appropriate for insert-';' fixits.
1081 bool Parser::isValidAfterTypeSpecifier(bool CouldBeBitfield) {
1082  // This switch enumerates the valid "follow" set for type-specifiers.
1083  switch (Tok.getKind()) {
1084  default: break;
1085  case tok::semi: // struct foo {...} ;
1086  case tok::star: // struct foo {...} * P;
1087  case tok::amp: // struct foo {...} & R = ...
1088  case tok::ampamp: // struct foo {...} && R = ...
1089  case tok::identifier: // struct foo {...} V ;
1090  case tok::r_paren: //(struct foo {...} ) {4}
1091  case tok::annot_cxxscope: // struct foo {...} a:: b;
1092  case tok::annot_typename: // struct foo {...} a ::b;
1093  case tok::annot_template_id: // struct foo {...} a<int> ::b;
1094  case tok::l_paren: // struct foo {...} ( x);
1095  case tok::comma: // __builtin_offsetof(struct foo{...} ,
1096  case tok::kw_operator: // struct foo operator ++() {...}
1097  case tok::kw___declspec: // struct foo {...} __declspec(...)
1098  case tok::l_square: // void f(struct f [ 3])
1099  case tok::ellipsis: // void f(struct f ... [Ns])
1100  // FIXME: we should emit semantic diagnostic when declaration
1101  // attribute is in type attribute position.
1102  case tok::kw___attribute: // struct foo __attribute__((used)) x;
1103  case tok::annot_pragma_pack: // struct foo {...} _Pragma(pack(pop));
1104  // struct foo {...} _Pragma(section(...));
1105  case tok::annot_pragma_ms_pragma:
1106  // struct foo {...} _Pragma(vtordisp(pop));
1107  case tok::annot_pragma_ms_vtordisp:
1108  // struct foo {...} _Pragma(pointers_to_members(...));
1109  case tok::annot_pragma_ms_pointers_to_members:
1110  return true;
1111  case tok::colon:
1112  return CouldBeBitfield; // enum E { ... } : 2;
1113  // Microsoft compatibility
1114  case tok::kw___cdecl: // struct foo {...} __cdecl x;
1115  case tok::kw___fastcall: // struct foo {...} __fastcall x;
1116  case tok::kw___stdcall: // struct foo {...} __stdcall x;
1117  case tok::kw___thiscall: // struct foo {...} __thiscall x;
1118  case tok::kw___vectorcall: // struct foo {...} __vectorcall x;
1119  // We will diagnose these calling-convention specifiers on non-function
1120  // declarations later, so claim they are valid after a type specifier.
1121  return getLangOpts().MicrosoftExt;
1122  // Type qualifiers
1123  case tok::kw_const: // struct foo {...} const x;
1124  case tok::kw_volatile: // struct foo {...} volatile x;
1125  case tok::kw_restrict: // struct foo {...} restrict x;
1126  case tok::kw__Atomic: // struct foo {...} _Atomic x;
1127  case tok::kw___unaligned: // struct foo {...} __unaligned *x;
1128  // Function specifiers
1129  // Note, no 'explicit'. An explicit function must be either a conversion
1130  // operator or a constructor. Either way, it can't have a return type.
1131  case tok::kw_inline: // struct foo inline f();
1132  case tok::kw_virtual: // struct foo virtual f();
1133  case tok::kw_friend: // struct foo friend f();
1134  // Storage-class specifiers
1135  case tok::kw_static: // struct foo {...} static x;
1136  case tok::kw_extern: // struct foo {...} extern x;
1137  case tok::kw_typedef: // struct foo {...} typedef x;
1138  case tok::kw_register: // struct foo {...} register x;
1139  case tok::kw_auto: // struct foo {...} auto x;
1140  case tok::kw_mutable: // struct foo {...} mutable x;
1141  case tok::kw_thread_local: // struct foo {...} thread_local x;
1142  case tok::kw_constexpr: // struct foo {...} constexpr x;
1143  // As shown above, type qualifiers and storage class specifiers absolutely
1144  // can occur after class specifiers according to the grammar. However,
1145  // almost no one actually writes code like this. If we see one of these,
1146  // it is much more likely that someone missed a semi colon and the
1147  // type/storage class specifier we're seeing is part of the *next*
1148  // intended declaration, as in:
1149  //
1150  // struct foo { ... }
1151  // typedef int X;
1152  //
1153  // We'd really like to emit a missing semicolon error instead of emitting
1154  // an error on the 'int' saying that you can't have two type specifiers in
1155  // the same declaration of X. Because of this, we look ahead past this
1156  // token to see if it's a type specifier. If so, we know the code is
1157  // otherwise invalid, so we can produce the expected semi error.
1158  if (!isKnownToBeTypeSpecifier(NextToken()))
1159  return true;
1160  break;
1161  case tok::r_brace: // struct bar { struct foo {...} }
1162  // Missing ';' at end of struct is accepted as an extension in C mode.
1163  if (!getLangOpts().CPlusPlus)
1164  return true;
1165  break;
1166  case tok::greater:
1167  // template<class T = class X>
1168  return getLangOpts().CPlusPlus;
1169  }
1170  return false;
1171 }
1172 
1173 /// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or
1174 /// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which
1175 /// until we reach the start of a definition or see a token that
1176 /// cannot start a definition.
1177 ///
1178 /// class-specifier: [C++ class]
1179 /// class-head '{' member-specification[opt] '}'
1180 /// class-head '{' member-specification[opt] '}' attributes[opt]
1181 /// class-head:
1182 /// class-key identifier[opt] base-clause[opt]
1183 /// class-key nested-name-specifier identifier base-clause[opt]
1184 /// class-key nested-name-specifier[opt] simple-template-id
1185 /// base-clause[opt]
1186 /// [GNU] class-key attributes[opt] identifier[opt] base-clause[opt]
1187 /// [GNU] class-key attributes[opt] nested-name-specifier
1188 /// identifier base-clause[opt]
1189 /// [GNU] class-key attributes[opt] nested-name-specifier[opt]
1190 /// simple-template-id base-clause[opt]
1191 /// class-key:
1192 /// 'class'
1193 /// 'struct'
1194 /// 'union'
1195 ///
1196 /// elaborated-type-specifier: [C++ dcl.type.elab]
1197 /// class-key ::[opt] nested-name-specifier[opt] identifier
1198 /// class-key ::[opt] nested-name-specifier[opt] 'template'[opt]
1199 /// simple-template-id
1200 ///
1201 /// Note that the C++ class-specifier and elaborated-type-specifier,
1202 /// together, subsume the C99 struct-or-union-specifier:
1203 ///
1204 /// struct-or-union-specifier: [C99 6.7.2.1]
1205 /// struct-or-union identifier[opt] '{' struct-contents '}'
1206 /// struct-or-union identifier
1207 /// [GNU] struct-or-union attributes[opt] identifier[opt] '{' struct-contents
1208 /// '}' attributes[opt]
1209 /// [GNU] struct-or-union attributes[opt] identifier
1210 /// struct-or-union:
1211 /// 'struct'
1212 /// 'union'
1213 void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind,
1214  SourceLocation StartLoc, DeclSpec &DS,
1215  const ParsedTemplateInfo &TemplateInfo,
1216  AccessSpecifier AS,
1217  bool EnteringContext, DeclSpecContext DSC,
1218  ParsedAttributesWithRange &Attributes) {
1220  if (TagTokKind == tok::kw_struct)
1221  TagType = DeclSpec::TST_struct;
1222  else if (TagTokKind == tok::kw___interface)
1223  TagType = DeclSpec::TST_interface;
1224  else if (TagTokKind == tok::kw_class)
1225  TagType = DeclSpec::TST_class;
1226  else {
1227  assert(TagTokKind == tok::kw_union && "Not a class specifier");
1228  TagType = DeclSpec::TST_union;
1229  }
1230 
1231  if (Tok.is(tok::code_completion)) {
1232  // Code completion for a struct, class, or union name.
1233  Actions.CodeCompleteTag(getCurScope(), TagType);
1234  return cutOffParsing();
1235  }
1236 
1237  // C++03 [temp.explicit] 14.7.2/8:
1238  // The usual access checking rules do not apply to names used to specify
1239  // explicit instantiations.
1240  //
1241  // As an extension we do not perform access checking on the names used to
1242  // specify explicit specializations either. This is important to allow
1243  // specializing traits classes for private types.
1244  //
1245  // Note that we don't suppress if this turns out to be an elaborated
1246  // type specifier.
1247  bool shouldDelayDiagsInTag =
1248  (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation ||
1249  TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization);
1250  SuppressAccessChecks diagsFromTag(*this, shouldDelayDiagsInTag);
1251 
1252  ParsedAttributesWithRange attrs(AttrFactory);
1253  // If attributes exist after tag, parse them.
1254  MaybeParseGNUAttributes(attrs);
1255  MaybeParseMicrosoftDeclSpecs(attrs);
1256 
1257  // Parse inheritance specifiers.
1258  if (Tok.isOneOf(tok::kw___single_inheritance,
1259  tok::kw___multiple_inheritance,
1260  tok::kw___virtual_inheritance))
1261  ParseMicrosoftInheritanceClassAttributes(attrs);
1262 
1263  // If C++0x attributes exist here, parse them.
1264  // FIXME: Are we consistent with the ordering of parsing of different
1265  // styles of attributes?
1266  MaybeParseCXX11Attributes(attrs);
1267 
1268  // Source location used by FIXIT to insert misplaced
1269  // C++11 attributes
1270  SourceLocation AttrFixitLoc = Tok.getLocation();
1271 
1272  if (TagType == DeclSpec::TST_struct &&
1273  Tok.isNot(tok::identifier) &&
1274  !Tok.isAnnotation() &&
1275  Tok.getIdentifierInfo() &&
1276  Tok.isOneOf(tok::kw___is_abstract,
1277  tok::kw___is_arithmetic,
1278  tok::kw___is_array,
1279  tok::kw___is_assignable,
1280  tok::kw___is_base_of,
1281  tok::kw___is_class,
1282  tok::kw___is_complete_type,
1283  tok::kw___is_compound,
1284  tok::kw___is_const,
1285  tok::kw___is_constructible,
1286  tok::kw___is_convertible,
1287  tok::kw___is_convertible_to,
1288  tok::kw___is_destructible,
1289  tok::kw___is_empty,
1290  tok::kw___is_enum,
1291  tok::kw___is_floating_point,
1292  tok::kw___is_final,
1293  tok::kw___is_function,
1294  tok::kw___is_fundamental,
1295  tok::kw___is_integral,
1296  tok::kw___is_interface_class,
1297  tok::kw___is_literal,
1298  tok::kw___is_lvalue_expr,
1299  tok::kw___is_lvalue_reference,
1300  tok::kw___is_member_function_pointer,
1301  tok::kw___is_member_object_pointer,
1302  tok::kw___is_member_pointer,
1303  tok::kw___is_nothrow_assignable,
1304  tok::kw___is_nothrow_constructible,
1305  tok::kw___is_nothrow_destructible,
1306  tok::kw___is_object,
1307  tok::kw___is_pod,
1308  tok::kw___is_pointer,
1309  tok::kw___is_polymorphic,
1310  tok::kw___is_reference,
1311  tok::kw___is_rvalue_expr,
1312  tok::kw___is_rvalue_reference,
1313  tok::kw___is_same,
1314  tok::kw___is_scalar,
1315  tok::kw___is_sealed,
1316  tok::kw___is_signed,
1317  tok::kw___is_standard_layout,
1318  tok::kw___is_trivial,
1319  tok::kw___is_trivially_assignable,
1320  tok::kw___is_trivially_constructible,
1321  tok::kw___is_trivially_copyable,
1322  tok::kw___is_union,
1323  tok::kw___is_unsigned,
1324  tok::kw___is_void,
1325  tok::kw___is_volatile))
1326  // GNU libstdc++ 4.2 and libc++ use certain intrinsic names as the
1327  // name of struct templates, but some are keywords in GCC >= 4.3
1328  // and Clang. Therefore, when we see the token sequence "struct
1329  // X", make X into a normal identifier rather than a keyword, to
1330  // allow libstdc++ 4.2 and libc++ to work properly.
1331  TryKeywordIdentFallback(true);
1332 
1333  struct PreserveAtomicIdentifierInfoRAII {
1334  PreserveAtomicIdentifierInfoRAII(Token &Tok, bool Enabled)
1335  : AtomicII(nullptr) {
1336  if (!Enabled)
1337  return;
1338  assert(Tok.is(tok::kw__Atomic));
1339  AtomicII = Tok.getIdentifierInfo();
1340  AtomicII->revertTokenIDToIdentifier();
1341  Tok.setKind(tok::identifier);
1342  }
1343  ~PreserveAtomicIdentifierInfoRAII() {
1344  if (!AtomicII)
1345  return;
1346  AtomicII->revertIdentifierToTokenID(tok::kw__Atomic);
1347  }
1348  IdentifierInfo *AtomicII;
1349  };
1350 
1351  // HACK: MSVC doesn't consider _Atomic to be a keyword and its STL
1352  // implementation for VS2013 uses _Atomic as an identifier for one of the
1353  // classes in <atomic>. When we are parsing 'struct _Atomic', don't consider
1354  // '_Atomic' to be a keyword. We are careful to undo this so that clang can
1355  // use '_Atomic' in its own header files.
1356  bool ShouldChangeAtomicToIdentifier = getLangOpts().MSVCCompat &&
1357  Tok.is(tok::kw__Atomic) &&
1358  TagType == DeclSpec::TST_struct;
1359  PreserveAtomicIdentifierInfoRAII AtomicTokenGuard(
1360  Tok, ShouldChangeAtomicToIdentifier);
1361 
1362  // Parse the (optional) nested-name-specifier.
1363  CXXScopeSpec &SS = DS.getTypeSpecScope();
1364  if (getLangOpts().CPlusPlus) {
1365  // "FOO : BAR" is not a potential typo for "FOO::BAR". In this context it
1366  // is a base-specifier-list.
1368 
1369  CXXScopeSpec Spec;
1370  bool HasValidSpec = true;
1371  if (ParseOptionalCXXScopeSpecifier(Spec, nullptr, EnteringContext)) {
1372  DS.SetTypeSpecError();
1373  HasValidSpec = false;
1374  }
1375  if (Spec.isSet())
1376  if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) {
1377  Diag(Tok, diag::err_expected) << tok::identifier;
1378  HasValidSpec = false;
1379  }
1380  if (HasValidSpec)
1381  SS = Spec;
1382  }
1383 
1384  TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams;
1385 
1386  // Parse the (optional) class name or simple-template-id.
1387  IdentifierInfo *Name = nullptr;
1388  SourceLocation NameLoc;
1389  TemplateIdAnnotation *TemplateId = nullptr;
1390  if (Tok.is(tok::identifier)) {
1391  Name = Tok.getIdentifierInfo();
1392  NameLoc = ConsumeToken();
1393 
1394  if (Tok.is(tok::less) && getLangOpts().CPlusPlus) {
1395  // The name was supposed to refer to a template, but didn't.
1396  // Eat the template argument list and try to continue parsing this as
1397  // a class (or template thereof).
1398  TemplateArgList TemplateArgs;
1399  SourceLocation LAngleLoc, RAngleLoc;
1400  if (ParseTemplateIdAfterTemplateName(
1401  nullptr, NameLoc, SS, true, LAngleLoc, TemplateArgs, RAngleLoc)) {
1402  // We couldn't parse the template argument list at all, so don't
1403  // try to give any location information for the list.
1404  LAngleLoc = RAngleLoc = SourceLocation();
1405  }
1406 
1407  Diag(NameLoc, diag::err_explicit_spec_non_template)
1408  << (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation)
1409  << TagTokKind << Name << SourceRange(LAngleLoc, RAngleLoc);
1410 
1411  // Strip off the last template parameter list if it was empty, since
1412  // we've removed its template argument list.
1413  if (TemplateParams && TemplateInfo.LastParameterListWasEmpty) {
1414  if (TemplateParams->size() > 1) {
1415  TemplateParams->pop_back();
1416  } else {
1417  TemplateParams = nullptr;
1418  const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind
1419  = ParsedTemplateInfo::NonTemplate;
1420  }
1421  } else if (TemplateInfo.Kind
1422  == ParsedTemplateInfo::ExplicitInstantiation) {
1423  // Pretend this is just a forward declaration.
1424  TemplateParams = nullptr;
1425  const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind
1426  = ParsedTemplateInfo::NonTemplate;
1427  const_cast<ParsedTemplateInfo&>(TemplateInfo).TemplateLoc
1428  = SourceLocation();
1429  const_cast<ParsedTemplateInfo&>(TemplateInfo).ExternLoc
1430  = SourceLocation();
1431  }
1432  }
1433  } else if (Tok.is(tok::annot_template_id)) {
1434  TemplateId = takeTemplateIdAnnotation(Tok);
1435  NameLoc = ConsumeToken();
1436 
1437  if (TemplateId->Kind != TNK_Type_template &&
1438  TemplateId->Kind != TNK_Dependent_template_name) {
1439  // The template-name in the simple-template-id refers to
1440  // something other than a class template. Give an appropriate
1441  // error message and skip to the ';'.
1442  SourceRange Range(NameLoc);
1443  if (SS.isNotEmpty())
1444  Range.setBegin(SS.getBeginLoc());
1445 
1446  // FIXME: Name may be null here.
1447  Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template)
1448  << TemplateId->Name << static_cast<int>(TemplateId->Kind) << Range;
1449 
1450  DS.SetTypeSpecError();
1451  SkipUntil(tok::semi, StopBeforeMatch);
1452  return;
1453  }
1454  }
1455 
1456  // There are four options here.
1457  // - If we are in a trailing return type, this is always just a reference,
1458  // and we must not try to parse a definition. For instance,
1459  // [] () -> struct S { };
1460  // does not define a type.
1461  // - If we have 'struct foo {...', 'struct foo :...',
1462  // 'struct foo final :' or 'struct foo final {', then this is a definition.
1463  // - If we have 'struct foo;', then this is either a forward declaration
1464  // or a friend declaration, which have to be treated differently.
1465  // - Otherwise we have something like 'struct foo xyz', a reference.
1466  //
1467  // We also detect these erroneous cases to provide better diagnostic for
1468  // C++11 attributes parsing.
1469  // - attributes follow class name:
1470  // struct foo [[]] {};
1471  // - attributes appear before or after 'final':
1472  // struct foo [[]] final [[]] {};
1473  //
1474  // However, in type-specifier-seq's, things look like declarations but are
1475  // just references, e.g.
1476  // new struct s;
1477  // or
1478  // &T::operator struct s;
1479  // For these, DSC is DSC_type_specifier or DSC_alias_declaration.
1480 
1481  // If there are attributes after class name, parse them.
1482  MaybeParseCXX11Attributes(Attributes);
1483 
1484  const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
1485  Sema::TagUseKind TUK;
1486  if (DSC == DSC_trailing)
1487  TUK = Sema::TUK_Reference;
1488  else if (Tok.is(tok::l_brace) ||
1489  (getLangOpts().CPlusPlus && Tok.is(tok::colon)) ||
1490  (isCXX11FinalKeyword() &&
1491  (NextToken().is(tok::l_brace) || NextToken().is(tok::colon)))) {
1492  if (DS.isFriendSpecified()) {
1493  // C++ [class.friend]p2:
1494  // A class shall not be defined in a friend declaration.
1495  Diag(Tok.getLocation(), diag::err_friend_decl_defines_type)
1496  << SourceRange(DS.getFriendSpecLoc());
1497 
1498  // Skip everything up to the semicolon, so that this looks like a proper
1499  // friend class (or template thereof) declaration.
1500  SkipUntil(tok::semi, StopBeforeMatch);
1501  TUK = Sema::TUK_Friend;
1502  } else {
1503  // Okay, this is a class definition.
1504  TUK = Sema::TUK_Definition;
1505  }
1506  } else if (isCXX11FinalKeyword() && (NextToken().is(tok::l_square) ||
1507  NextToken().is(tok::kw_alignas))) {
1508  // We can't tell if this is a definition or reference
1509  // until we skipped the 'final' and C++11 attribute specifiers.
1510  TentativeParsingAction PA(*this);
1511 
1512  // Skip the 'final' keyword.
1513  ConsumeToken();
1514 
1515  // Skip C++11 attribute specifiers.
1516  while (true) {
1517  if (Tok.is(tok::l_square) && NextToken().is(tok::l_square)) {
1518  ConsumeBracket();
1519  if (!SkipUntil(tok::r_square, StopAtSemi))
1520  break;
1521  } else if (Tok.is(tok::kw_alignas) && NextToken().is(tok::l_paren)) {
1522  ConsumeToken();
1523  ConsumeParen();
1524  if (!SkipUntil(tok::r_paren, StopAtSemi))
1525  break;
1526  } else {
1527  break;
1528  }
1529  }
1530 
1531  if (Tok.isOneOf(tok::l_brace, tok::colon))
1532  TUK = Sema::TUK_Definition;
1533  else
1534  TUK = Sema::TUK_Reference;
1535 
1536  PA.Revert();
1537  } else if (!isTypeSpecifier(DSC) &&
1538  (Tok.is(tok::semi) ||
1539  (Tok.isAtStartOfLine() && !isValidAfterTypeSpecifier(false)))) {
1541  if (Tok.isNot(tok::semi)) {
1542  const PrintingPolicy &PPol = Actions.getASTContext().getPrintingPolicy();
1543  // A semicolon was missing after this declaration. Diagnose and recover.
1544  ExpectAndConsume(tok::semi, diag::err_expected_after,
1545  DeclSpec::getSpecifierName(TagType, PPol));
1546  PP.EnterToken(Tok);
1547  Tok.setKind(tok::semi);
1548  }
1549  } else
1550  TUK = Sema::TUK_Reference;
1551 
1552  // Forbid misplaced attributes. In cases of a reference, we pass attributes
1553  // to caller to handle.
1554  if (TUK != Sema::TUK_Reference) {
1555  // If this is not a reference, then the only possible
1556  // valid place for C++11 attributes to appear here
1557  // is between class-key and class-name. If there are
1558  // any attributes after class-name, we try a fixit to move
1559  // them to the right place.
1560  SourceRange AttrRange = Attributes.Range;
1561  if (AttrRange.isValid()) {
1562  Diag(AttrRange.getBegin(), diag::err_attributes_not_allowed)
1563  << AttrRange
1564  << FixItHint::CreateInsertionFromRange(AttrFixitLoc,
1565  CharSourceRange(AttrRange, true))
1566  << FixItHint::CreateRemoval(AttrRange);
1567 
1568  // Recover by adding misplaced attributes to the attribute list
1569  // of the class so they can be applied on the class later.
1570  attrs.takeAllFrom(Attributes);
1571  }
1572  }
1573 
1574  // If this is an elaborated type specifier, and we delayed
1575  // diagnostics before, just merge them into the current pool.
1576  if (shouldDelayDiagsInTag) {
1577  diagsFromTag.done();
1578  if (TUK == Sema::TUK_Reference)
1579  diagsFromTag.redelay();
1580  }
1581 
1582  if (!Name && !TemplateId && (DS.getTypeSpecType() == DeclSpec::TST_error ||
1583  TUK != Sema::TUK_Definition)) {
1584  if (DS.getTypeSpecType() != DeclSpec::TST_error) {
1585  // We have a declaration or reference to an anonymous class.
1586  Diag(StartLoc, diag::err_anon_type_definition)
1587  << DeclSpec::getSpecifierName(TagType, Policy);
1588  }
1589 
1590  // If we are parsing a definition and stop at a base-clause, continue on
1591  // until the semicolon. Continuing from the comma will just trick us into
1592  // thinking we are seeing a variable declaration.
1593  if (TUK == Sema::TUK_Definition && Tok.is(tok::colon))
1594  SkipUntil(tok::semi, StopBeforeMatch);
1595  else
1596  SkipUntil(tok::comma, StopAtSemi);
1597  return;
1598  }
1599 
1600  // Create the tag portion of the class or class template.
1601  DeclResult TagOrTempResult = true; // invalid
1602  TypeResult TypeResult = true; // invalid
1603 
1604  bool Owned = false;
1605  Sema::SkipBodyInfo SkipBody;
1606  if (TemplateId) {
1607  // Explicit specialization, class template partial specialization,
1608  // or explicit instantiation.
1609  ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
1610  TemplateId->NumArgs);
1611  if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation &&
1612  TUK == Sema::TUK_Declaration) {
1613  // This is an explicit instantiation of a class template.
1614  ProhibitAttributes(attrs);
1615 
1616  TagOrTempResult
1618  TemplateInfo.ExternLoc,
1619  TemplateInfo.TemplateLoc,
1620  TagType,
1621  StartLoc,
1622  SS,
1623  TemplateId->Template,
1624  TemplateId->TemplateNameLoc,
1625  TemplateId->LAngleLoc,
1626  TemplateArgsPtr,
1627  TemplateId->RAngleLoc,
1628  attrs.getList());
1629 
1630  // Friend template-ids are treated as references unless
1631  // they have template headers, in which case they're ill-formed
1632  // (FIXME: "template <class T> friend class A<T>::B<int>;").
1633  // We diagnose this error in ActOnClassTemplateSpecialization.
1634  } else if (TUK == Sema::TUK_Reference ||
1635  (TUK == Sema::TUK_Friend &&
1636  TemplateInfo.Kind == ParsedTemplateInfo::NonTemplate)) {
1637  ProhibitAttributes(attrs);
1638  TypeResult = Actions.ActOnTagTemplateIdType(TUK, TagType, StartLoc,
1639  TemplateId->SS,
1640  TemplateId->TemplateKWLoc,
1641  TemplateId->Template,
1642  TemplateId->TemplateNameLoc,
1643  TemplateId->LAngleLoc,
1644  TemplateArgsPtr,
1645  TemplateId->RAngleLoc);
1646  } else {
1647  // This is an explicit specialization or a class template
1648  // partial specialization.
1649  TemplateParameterLists FakedParamLists;
1650  if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
1651  // This looks like an explicit instantiation, because we have
1652  // something like
1653  //
1654  // template class Foo<X>
1655  //
1656  // but it actually has a definition. Most likely, this was
1657  // meant to be an explicit specialization, but the user forgot
1658  // the '<>' after 'template'.
1659  // It this is friend declaration however, since it cannot have a
1660  // template header, it is most likely that the user meant to
1661  // remove the 'template' keyword.
1662  assert((TUK == Sema::TUK_Definition || TUK == Sema::TUK_Friend) &&
1663  "Expected a definition here");
1664 
1665  if (TUK == Sema::TUK_Friend) {
1666  Diag(DS.getFriendSpecLoc(), diag::err_friend_explicit_instantiation);
1667  TemplateParams = nullptr;
1668  } else {
1669  SourceLocation LAngleLoc =
1670  PP.getLocForEndOfToken(TemplateInfo.TemplateLoc);
1671  Diag(TemplateId->TemplateNameLoc,
1672  diag::err_explicit_instantiation_with_definition)
1673  << SourceRange(TemplateInfo.TemplateLoc)
1674  << FixItHint::CreateInsertion(LAngleLoc, "<>");
1675 
1676  // Create a fake template parameter list that contains only
1677  // "template<>", so that we treat this construct as a class
1678  // template specialization.
1679  FakedParamLists.push_back(Actions.ActOnTemplateParameterList(
1680  0, SourceLocation(), TemplateInfo.TemplateLoc, LAngleLoc, None,
1681  LAngleLoc, nullptr));
1682  TemplateParams = &FakedParamLists;
1683  }
1684  }
1685 
1686  // Build the class template specialization.
1687  TagOrTempResult = Actions.ActOnClassTemplateSpecialization(
1688  getCurScope(), TagType, TUK, StartLoc, DS.getModulePrivateSpecLoc(),
1689  *TemplateId, attrs.getList(),
1690  MultiTemplateParamsArg(TemplateParams ? &(*TemplateParams)[0]
1691  : nullptr,
1692  TemplateParams ? TemplateParams->size() : 0),
1693  &SkipBody);
1694  }
1695  } else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation &&
1696  TUK == Sema::TUK_Declaration) {
1697  // Explicit instantiation of a member of a class template
1698  // specialization, e.g.,
1699  //
1700  // template struct Outer<int>::Inner;
1701  //
1702  ProhibitAttributes(attrs);
1703 
1704  TagOrTempResult
1706  TemplateInfo.ExternLoc,
1707  TemplateInfo.TemplateLoc,
1708  TagType, StartLoc, SS, Name,
1709  NameLoc, attrs.getList());
1710  } else if (TUK == Sema::TUK_Friend &&
1711  TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) {
1712  ProhibitAttributes(attrs);
1713 
1714  TagOrTempResult =
1716  TagType, StartLoc, SS,
1717  Name, NameLoc, attrs.getList(),
1719  TemplateParams? &(*TemplateParams)[0]
1720  : nullptr,
1721  TemplateParams? TemplateParams->size() : 0));
1722  } else {
1723  if (TUK != Sema::TUK_Declaration && TUK != Sema::TUK_Definition)
1724  ProhibitAttributes(attrs);
1725 
1726  if (TUK == Sema::TUK_Definition &&
1727  TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
1728  // If the declarator-id is not a template-id, issue a diagnostic and
1729  // recover by ignoring the 'template' keyword.
1730  Diag(Tok, diag::err_template_defn_explicit_instantiation)
1731  << 1 << FixItHint::CreateRemoval(TemplateInfo.TemplateLoc);
1732  TemplateParams = nullptr;
1733  }
1734 
1735  bool IsDependent = false;
1736 
1737  // Don't pass down template parameter lists if this is just a tag
1738  // reference. For example, we don't need the template parameters here:
1739  // template <class T> class A *makeA(T t);
1740  MultiTemplateParamsArg TParams;
1741  if (TUK != Sema::TUK_Reference && TemplateParams)
1742  TParams =
1743  MultiTemplateParamsArg(&(*TemplateParams)[0], TemplateParams->size());
1744 
1745  handleDeclspecAlignBeforeClassKey(attrs, DS, TUK);
1746 
1747  // Declaration or definition of a class type
1748  TagOrTempResult = Actions.ActOnTag(getCurScope(), TagType, TUK, StartLoc,
1749  SS, Name, NameLoc, attrs.getList(), AS,
1751  TParams, Owned, IsDependent,
1752  SourceLocation(), false,
1754  DSC == DSC_type_specifier,
1755  &SkipBody);
1756 
1757  // If ActOnTag said the type was dependent, try again with the
1758  // less common call.
1759  if (IsDependent) {
1760  assert(TUK == Sema::TUK_Reference || TUK == Sema::TUK_Friend);
1761  TypeResult = Actions.ActOnDependentTag(getCurScope(), TagType, TUK,
1762  SS, Name, StartLoc, NameLoc);
1763  }
1764  }
1765 
1766  // If there is a body, parse it and inform the actions module.
1767  if (TUK == Sema::TUK_Definition) {
1768  assert(Tok.is(tok::l_brace) ||
1769  (getLangOpts().CPlusPlus && Tok.is(tok::colon)) ||
1770  isCXX11FinalKeyword());
1771  if (SkipBody.ShouldSkip)
1772  SkipCXXMemberSpecification(StartLoc, AttrFixitLoc, TagType,
1773  TagOrTempResult.get());
1774  else if (getLangOpts().CPlusPlus)
1775  ParseCXXMemberSpecification(StartLoc, AttrFixitLoc, attrs, TagType,
1776  TagOrTempResult.get());
1777  else
1778  ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get());
1779  }
1780 
1781  const char *PrevSpec = nullptr;
1782  unsigned DiagID;
1783  bool Result;
1784  if (!TypeResult.isInvalid()) {
1785  Result = DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc,
1786  NameLoc.isValid() ? NameLoc : StartLoc,
1787  PrevSpec, DiagID, TypeResult.get(), Policy);
1788  } else if (!TagOrTempResult.isInvalid()) {
1789  Result = DS.SetTypeSpecType(TagType, StartLoc,
1790  NameLoc.isValid() ? NameLoc : StartLoc,
1791  PrevSpec, DiagID, TagOrTempResult.get(), Owned,
1792  Policy);
1793  } else {
1794  DS.SetTypeSpecError();
1795  return;
1796  }
1797 
1798  if (Result)
1799  Diag(StartLoc, DiagID) << PrevSpec;
1800 
1801  // At this point, we've successfully parsed a class-specifier in 'definition'
1802  // form (e.g. "struct foo { int x; }". While we could just return here, we're
1803  // going to look at what comes after it to improve error recovery. If an
1804  // impossible token occurs next, we assume that the programmer forgot a ; at
1805  // the end of the declaration and recover that way.
1806  //
1807  // Also enforce C++ [temp]p3:
1808  // In a template-declaration which defines a class, no declarator
1809  // is permitted.
1810  //
1811  // After a type-specifier, we don't expect a semicolon. This only happens in
1812  // C, since definitions are not permitted in this context in C++.
1813  if (TUK == Sema::TUK_Definition &&
1814  (getLangOpts().CPlusPlus || !isTypeSpecifier(DSC)) &&
1815  (TemplateInfo.Kind || !isValidAfterTypeSpecifier(false))) {
1816  if (Tok.isNot(tok::semi)) {
1817  const PrintingPolicy &PPol = Actions.getASTContext().getPrintingPolicy();
1818  ExpectAndConsume(tok::semi, diag::err_expected_after,
1819  DeclSpec::getSpecifierName(TagType, PPol));
1820  // Push this token back into the preprocessor and change our current token
1821  // to ';' so that the rest of the code recovers as though there were an
1822  // ';' after the definition.
1823  PP.EnterToken(Tok);
1824  Tok.setKind(tok::semi);
1825  }
1826  }
1827 }
1828 
1829 /// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived].
1830 ///
1831 /// base-clause : [C++ class.derived]
1832 /// ':' base-specifier-list
1833 /// base-specifier-list:
1834 /// base-specifier '...'[opt]
1835 /// base-specifier-list ',' base-specifier '...'[opt]
1836 void Parser::ParseBaseClause(Decl *ClassDecl) {
1837  assert(Tok.is(tok::colon) && "Not a base clause");
1838  ConsumeToken();
1839 
1840  // Build up an array of parsed base specifiers.
1842 
1843  while (true) {
1844  // Parse a base-specifier.
1845  BaseResult Result = ParseBaseSpecifier(ClassDecl);
1846  if (Result.isInvalid()) {
1847  // Skip the rest of this base specifier, up until the comma or
1848  // opening brace.
1849  SkipUntil(tok::comma, tok::l_brace, StopAtSemi | StopBeforeMatch);
1850  } else {
1851  // Add this to our array of base specifiers.
1852  BaseInfo.push_back(Result.get());
1853  }
1854 
1855  // If the next token is a comma, consume it and keep reading
1856  // base-specifiers.
1857  if (!TryConsumeToken(tok::comma))
1858  break;
1859  }
1860 
1861  // Attach the base specifiers
1862  Actions.ActOnBaseSpecifiers(ClassDecl, BaseInfo);
1863 }
1864 
1865 /// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is
1866 /// one entry in the base class list of a class specifier, for example:
1867 /// class foo : public bar, virtual private baz {
1868 /// 'public bar' and 'virtual private baz' are each base-specifiers.
1869 ///
1870 /// base-specifier: [C++ class.derived]
1871 /// attribute-specifier-seq[opt] base-type-specifier
1872 /// attribute-specifier-seq[opt] 'virtual' access-specifier[opt]
1873 /// base-type-specifier
1874 /// attribute-specifier-seq[opt] access-specifier 'virtual'[opt]
1875 /// base-type-specifier
1876 BaseResult Parser::ParseBaseSpecifier(Decl *ClassDecl) {
1877  bool IsVirtual = false;
1878  SourceLocation StartLoc = Tok.getLocation();
1879 
1880  ParsedAttributesWithRange Attributes(AttrFactory);
1881  MaybeParseCXX11Attributes(Attributes);
1882 
1883  // Parse the 'virtual' keyword.
1884  if (TryConsumeToken(tok::kw_virtual))
1885  IsVirtual = true;
1886 
1887  CheckMisplacedCXX11Attribute(Attributes, StartLoc);
1888 
1889  // Parse an (optional) access specifier.
1890  AccessSpecifier Access = getAccessSpecifierIfPresent();
1891  if (Access != AS_none)
1892  ConsumeToken();
1893 
1894  CheckMisplacedCXX11Attribute(Attributes, StartLoc);
1895 
1896  // Parse the 'virtual' keyword (again!), in case it came after the
1897  // access specifier.
1898  if (Tok.is(tok::kw_virtual)) {
1899  SourceLocation VirtualLoc = ConsumeToken();
1900  if (IsVirtual) {
1901  // Complain about duplicate 'virtual'
1902  Diag(VirtualLoc, diag::err_dup_virtual)
1903  << FixItHint::CreateRemoval(VirtualLoc);
1904  }
1905 
1906  IsVirtual = true;
1907  }
1908 
1909  CheckMisplacedCXX11Attribute(Attributes, StartLoc);
1910 
1911  // Parse the class-name.
1912 
1913  // HACK: MSVC doesn't consider _Atomic to be a keyword and its STL
1914  // implementation for VS2013 uses _Atomic as an identifier for one of the
1915  // classes in <atomic>. Treat '_Atomic' to be an identifier when we are
1916  // parsing the class-name for a base specifier.
1917  if (getLangOpts().MSVCCompat && Tok.is(tok::kw__Atomic) &&
1918  NextToken().is(tok::less))
1919  Tok.setKind(tok::identifier);
1920 
1921  SourceLocation EndLocation;
1922  SourceLocation BaseLoc;
1923  TypeResult BaseType = ParseBaseTypeSpecifier(BaseLoc, EndLocation);
1924  if (BaseType.isInvalid())
1925  return true;
1926 
1927  // Parse the optional ellipsis (for a pack expansion). The ellipsis is
1928  // actually part of the base-specifier-list grammar productions, but we
1929  // parse it here for convenience.
1930  SourceLocation EllipsisLoc;
1931  TryConsumeToken(tok::ellipsis, EllipsisLoc);
1932 
1933  // Find the complete source range for the base-specifier.
1934  SourceRange Range(StartLoc, EndLocation);
1935 
1936  // Notify semantic analysis that we have parsed a complete
1937  // base-specifier.
1938  return Actions.ActOnBaseSpecifier(ClassDecl, Range, Attributes, IsVirtual,
1939  Access, BaseType.get(), BaseLoc,
1940  EllipsisLoc);
1941 }
1942 
1943 /// getAccessSpecifierIfPresent - Determine whether the next token is
1944 /// a C++ access-specifier.
1945 ///
1946 /// access-specifier: [C++ class.derived]
1947 /// 'private'
1948 /// 'protected'
1949 /// 'public'
1950 AccessSpecifier Parser::getAccessSpecifierIfPresent() const {
1951  switch (Tok.getKind()) {
1952  default: return AS_none;
1953  case tok::kw_private: return AS_private;
1954  case tok::kw_protected: return AS_protected;
1955  case tok::kw_public: return AS_public;
1956  }
1957 }
1958 
1959 /// \brief If the given declarator has any parts for which parsing has to be
1960 /// delayed, e.g., default arguments or an exception-specification, create a
1961 /// late-parsed method declaration record to handle the parsing at the end of
1962 /// the class definition.
1963 void Parser::HandleMemberFunctionDeclDelays(Declarator& DeclaratorInfo,
1964  Decl *ThisDecl) {
1966  = DeclaratorInfo.getFunctionTypeInfo();
1967  // If there was a late-parsed exception-specification, we'll need a
1968  // late parse
1969  bool NeedLateParse = FTI.getExceptionSpecType() == EST_Unparsed;
1970 
1971  if (!NeedLateParse) {
1972  // Look ahead to see if there are any default args
1973  for (unsigned ParamIdx = 0; ParamIdx < FTI.NumParams; ++ParamIdx) {
1974  auto Param = cast<ParmVarDecl>(FTI.Params[ParamIdx].Param);
1975  if (Param->hasUnparsedDefaultArg()) {
1976  NeedLateParse = true;
1977  break;
1978  }
1979  }
1980  }
1981 
1982  if (NeedLateParse) {
1983  // Push this method onto the stack of late-parsed method
1984  // declarations.
1985  auto LateMethod = new LateParsedMethodDeclaration(this, ThisDecl);
1986  getCurrentClass().LateParsedDeclarations.push_back(LateMethod);
1987  LateMethod->TemplateScope = getCurScope()->isTemplateParamScope();
1988 
1989  // Stash the exception-specification tokens in the late-pased method.
1990  LateMethod->ExceptionSpecTokens = FTI.ExceptionSpecTokens;
1991  FTI.ExceptionSpecTokens = nullptr;
1992 
1993  // Push tokens for each parameter. Those that do not have
1994  // defaults will be NULL.
1995  LateMethod->DefaultArgs.reserve(FTI.NumParams);
1996  for (unsigned ParamIdx = 0; ParamIdx < FTI.NumParams; ++ParamIdx)
1997  LateMethod->DefaultArgs.push_back(LateParsedDefaultArgument(
1998  FTI.Params[ParamIdx].Param, FTI.Params[ParamIdx].DefaultArgTokens));
1999  }
2000 }
2001 
2002 /// isCXX11VirtSpecifier - Determine whether the given token is a C++11
2003 /// virt-specifier.
2004 ///
2005 /// virt-specifier:
2006 /// override
2007 /// final
2008 VirtSpecifiers::Specifier Parser::isCXX11VirtSpecifier(const Token &Tok) const {
2009  if (!getLangOpts().CPlusPlus || Tok.isNot(tok::identifier))
2010  return VirtSpecifiers::VS_None;
2011 
2012  IdentifierInfo *II = Tok.getIdentifierInfo();
2013 
2014  // Initialize the contextual keywords.
2015  if (!Ident_final) {
2016  Ident_final = &PP.getIdentifierTable().get("final");
2017  if (getLangOpts().MicrosoftExt)
2018  Ident_sealed = &PP.getIdentifierTable().get("sealed");
2019  Ident_override = &PP.getIdentifierTable().get("override");
2020  }
2021 
2022  if (II == Ident_override)
2024 
2025  if (II == Ident_sealed)
2027 
2028  if (II == Ident_final)
2029  return VirtSpecifiers::VS_Final;
2030 
2031  return VirtSpecifiers::VS_None;
2032 }
2033 
2034 /// ParseOptionalCXX11VirtSpecifierSeq - Parse a virt-specifier-seq.
2035 ///
2036 /// virt-specifier-seq:
2037 /// virt-specifier
2038 /// virt-specifier-seq virt-specifier
2039 void Parser::ParseOptionalCXX11VirtSpecifierSeq(VirtSpecifiers &VS,
2040  bool IsInterface,
2041  SourceLocation FriendLoc) {
2042  while (true) {
2043  VirtSpecifiers::Specifier Specifier = isCXX11VirtSpecifier();
2044  if (Specifier == VirtSpecifiers::VS_None)
2045  return;
2046 
2047  if (FriendLoc.isValid()) {
2048  Diag(Tok.getLocation(), diag::err_friend_decl_spec)
2049  << VirtSpecifiers::getSpecifierName(Specifier)
2051  << SourceRange(FriendLoc, FriendLoc);
2052  ConsumeToken();
2053  continue;
2054  }
2055 
2056  // C++ [class.mem]p8:
2057  // A virt-specifier-seq shall contain at most one of each virt-specifier.
2058  const char *PrevSpec = nullptr;
2059  if (VS.SetSpecifier(Specifier, Tok.getLocation(), PrevSpec))
2060  Diag(Tok.getLocation(), diag::err_duplicate_virt_specifier)
2061  << PrevSpec
2063 
2064  if (IsInterface && (Specifier == VirtSpecifiers::VS_Final ||
2065  Specifier == VirtSpecifiers::VS_Sealed)) {
2066  Diag(Tok.getLocation(), diag::err_override_control_interface)
2067  << VirtSpecifiers::getSpecifierName(Specifier);
2068  } else if (Specifier == VirtSpecifiers::VS_Sealed) {
2069  Diag(Tok.getLocation(), diag::ext_ms_sealed_keyword);
2070  } else {
2071  Diag(Tok.getLocation(),
2072  getLangOpts().CPlusPlus11
2073  ? diag::warn_cxx98_compat_override_control_keyword
2074  : diag::ext_override_control_keyword)
2075  << VirtSpecifiers::getSpecifierName(Specifier);
2076  }
2077  ConsumeToken();
2078  }
2079 }
2080 
2081 /// isCXX11FinalKeyword - Determine whether the next token is a C++11
2082 /// 'final' or Microsoft 'sealed' contextual keyword.
2083 bool Parser::isCXX11FinalKeyword() const {
2084  VirtSpecifiers::Specifier Specifier = isCXX11VirtSpecifier();
2085  return Specifier == VirtSpecifiers::VS_Final ||
2086  Specifier == VirtSpecifiers::VS_Sealed;
2087 }
2088 
2089 /// \brief Parse a C++ member-declarator up to, but not including, the optional
2090 /// brace-or-equal-initializer or pure-specifier.
2091 bool Parser::ParseCXXMemberDeclaratorBeforeInitializer(
2092  Declarator &DeclaratorInfo, VirtSpecifiers &VS, ExprResult &BitfieldSize,
2093  LateParsedAttrList &LateParsedAttrs) {
2094  // member-declarator:
2095  // declarator pure-specifier[opt]
2096  // declarator brace-or-equal-initializer[opt]
2097  // identifier[opt] ':' constant-expression
2098  if (Tok.isNot(tok::colon))
2099  ParseDeclarator(DeclaratorInfo);
2100  else
2101  DeclaratorInfo.SetIdentifier(nullptr, Tok.getLocation());
2102 
2103  if (!DeclaratorInfo.isFunctionDeclarator() && TryConsumeToken(tok::colon)) {
2104  assert(DeclaratorInfo.isPastIdentifier() &&
2105  "don't know where identifier would go yet?");
2106  BitfieldSize = ParseConstantExpression();
2107  if (BitfieldSize.isInvalid())
2108  SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
2109  } else {
2110  ParseOptionalCXX11VirtSpecifierSeq(
2111  VS, getCurrentClass().IsInterface,
2112  DeclaratorInfo.getDeclSpec().getFriendSpecLoc());
2113  if (!VS.isUnset())
2114  MaybeParseAndDiagnoseDeclSpecAfterCXX11VirtSpecifierSeq(DeclaratorInfo, VS);
2115  }
2116 
2117  // If a simple-asm-expr is present, parse it.
2118  if (Tok.is(tok::kw_asm)) {
2119  SourceLocation Loc;
2120  ExprResult AsmLabel(ParseSimpleAsm(&Loc));
2121  if (AsmLabel.isInvalid())
2122  SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
2123 
2124  DeclaratorInfo.setAsmLabel(AsmLabel.get());
2125  DeclaratorInfo.SetRangeEnd(Loc);
2126  }
2127 
2128  // If attributes exist after the declarator, but before an '{', parse them.
2129  MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs);
2130 
2131  // For compatibility with code written to older Clang, also accept a
2132  // virt-specifier *after* the GNU attributes.
2133  if (BitfieldSize.isUnset() && VS.isUnset()) {
2134  ParseOptionalCXX11VirtSpecifierSeq(
2135  VS, getCurrentClass().IsInterface,
2136  DeclaratorInfo.getDeclSpec().getFriendSpecLoc());
2137  if (!VS.isUnset()) {
2138  // If we saw any GNU-style attributes that are known to GCC followed by a
2139  // virt-specifier, issue a GCC-compat warning.
2140  const AttributeList *Attr = DeclaratorInfo.getAttributes();
2141  while (Attr) {
2142  if (Attr->isKnownToGCC() && !Attr->isCXX11Attribute())
2143  Diag(Attr->getLoc(), diag::warn_gcc_attribute_location);
2144  Attr = Attr->getNext();
2145  }
2146  MaybeParseAndDiagnoseDeclSpecAfterCXX11VirtSpecifierSeq(DeclaratorInfo, VS);
2147  }
2148  }
2149 
2150  // If this has neither a name nor a bit width, something has gone seriously
2151  // wrong. Skip until the semi-colon or }.
2152  if (!DeclaratorInfo.hasName() && BitfieldSize.isUnset()) {
2153  // If so, skip until the semi-colon or a }.
2154  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
2155  return true;
2156  }
2157  return false;
2158 }
2159 
2160 /// \brief Look for declaration specifiers possibly occurring after C++11
2161 /// virt-specifier-seq and diagnose them.
2162 void Parser::MaybeParseAndDiagnoseDeclSpecAfterCXX11VirtSpecifierSeq(
2163  Declarator &D,
2164  VirtSpecifiers &VS) {
2165  DeclSpec DS(AttrFactory);
2166 
2167  // GNU-style and C++11 attributes are not allowed here, but they will be
2168  // handled by the caller. Diagnose everything else.
2169  ParseTypeQualifierListOpt(DS, AR_NoAttributesParsed, false);
2170  D.ExtendWithDeclSpec(DS);
2171 
2172  if (D.isFunctionDeclarator()) {
2173  auto &Function = D.getFunctionTypeInfo();
2175  auto DeclSpecCheck = [&] (DeclSpec::TQ TypeQual,
2176  const char *FixItName,
2177  SourceLocation SpecLoc,
2178  unsigned* QualifierLoc) {
2179  FixItHint Insertion;
2180  if (DS.getTypeQualifiers() & TypeQual) {
2181  if (!(Function.TypeQuals & TypeQual)) {
2182  std::string Name(FixItName);
2183  Name += " ";
2184  Insertion = FixItHint::CreateInsertion(VS.getFirstLocation(), Name.c_str());
2185  Function.TypeQuals |= TypeQual;
2186  *QualifierLoc = SpecLoc.getRawEncoding();
2187  }
2188  Diag(SpecLoc, diag::err_declspec_after_virtspec)
2189  << FixItName
2191  << FixItHint::CreateRemoval(SpecLoc)
2192  << Insertion;
2193  }
2194  };
2195  DeclSpecCheck(DeclSpec::TQ_const, "const", DS.getConstSpecLoc(),
2196  &Function.ConstQualifierLoc);
2197  DeclSpecCheck(DeclSpec::TQ_volatile, "volatile", DS.getVolatileSpecLoc(),
2198  &Function.VolatileQualifierLoc);
2199  DeclSpecCheck(DeclSpec::TQ_restrict, "restrict", DS.getRestrictSpecLoc(),
2200  &Function.RestrictQualifierLoc);
2201  }
2202 
2203  // Parse ref-qualifiers.
2204  bool RefQualifierIsLValueRef = true;
2205  SourceLocation RefQualifierLoc;
2206  if (ParseRefQualifier(RefQualifierIsLValueRef, RefQualifierLoc)) {
2207  const char *Name = (RefQualifierIsLValueRef ? "& " : "&& ");
2209  Function.RefQualifierIsLValueRef = RefQualifierIsLValueRef;
2210  Function.RefQualifierLoc = RefQualifierLoc.getRawEncoding();
2211 
2212  Diag(RefQualifierLoc, diag::err_declspec_after_virtspec)
2213  << (RefQualifierIsLValueRef ? "&" : "&&")
2215  << FixItHint::CreateRemoval(RefQualifierLoc)
2216  << Insertion;
2217  D.SetRangeEnd(RefQualifierLoc);
2218  }
2219  }
2220 }
2221 
2222 /// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration.
2223 ///
2224 /// member-declaration:
2225 /// decl-specifier-seq[opt] member-declarator-list[opt] ';'
2226 /// function-definition ';'[opt]
2227 /// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO]
2228 /// using-declaration [TODO]
2229 /// [C++0x] static_assert-declaration
2230 /// template-declaration
2231 /// [GNU] '__extension__' member-declaration
2232 ///
2233 /// member-declarator-list:
2234 /// member-declarator
2235 /// member-declarator-list ',' member-declarator
2236 ///
2237 /// member-declarator:
2238 /// declarator virt-specifier-seq[opt] pure-specifier[opt]
2239 /// declarator constant-initializer[opt]
2240 /// [C++11] declarator brace-or-equal-initializer[opt]
2241 /// identifier[opt] ':' constant-expression
2242 ///
2243 /// virt-specifier-seq:
2244 /// virt-specifier
2245 /// virt-specifier-seq virt-specifier
2246 ///
2247 /// virt-specifier:
2248 /// override
2249 /// final
2250 /// [MS] sealed
2251 ///
2252 /// pure-specifier:
2253 /// '= 0'
2254 ///
2255 /// constant-initializer:
2256 /// '=' constant-expression
2257 ///
2259 Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS,
2260  AttributeList *AccessAttrs,
2261  const ParsedTemplateInfo &TemplateInfo,
2262  ParsingDeclRAIIObject *TemplateDiags) {
2263  if (Tok.is(tok::at)) {
2264  if (getLangOpts().ObjC1 && NextToken().isObjCAtKeyword(tok::objc_defs))
2265  Diag(Tok, diag::err_at_defs_cxx);
2266  else
2267  Diag(Tok, diag::err_at_in_class);
2268 
2269  ConsumeToken();
2270  SkipUntil(tok::r_brace, StopAtSemi);
2271  return nullptr;
2272  }
2273 
2274  // Turn on colon protection early, while parsing declspec, although there is
2275  // nothing to protect there. It prevents from false errors if error recovery
2276  // incorrectly determines where the declspec ends, as in the example:
2277  // struct A { enum class B { C }; };
2278  // const int C = 4;
2279  // struct D { A::B : C; };
2281 
2282  // Access declarations.
2283  bool MalformedTypeSpec = false;
2284  if (!TemplateInfo.Kind &&
2285  Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw___super)) {
2287  MalformedTypeSpec = true;
2288 
2289  bool isAccessDecl;
2290  if (Tok.isNot(tok::annot_cxxscope))
2291  isAccessDecl = false;
2292  else if (NextToken().is(tok::identifier))
2293  isAccessDecl = GetLookAheadToken(2).is(tok::semi);
2294  else
2295  isAccessDecl = NextToken().is(tok::kw_operator);
2296 
2297  if (isAccessDecl) {
2298  // Collect the scope specifier token we annotated earlier.
2299  CXXScopeSpec SS;
2300  ParseOptionalCXXScopeSpecifier(SS, nullptr,
2301  /*EnteringContext=*/false);
2302 
2303  if (SS.isInvalid()) {
2304  SkipUntil(tok::semi);
2305  return nullptr;
2306  }
2307 
2308  // Try to parse an unqualified-id.
2309  SourceLocation TemplateKWLoc;
2311  if (ParseUnqualifiedId(SS, false, true, true, nullptr, TemplateKWLoc,
2312  Name)) {
2313  SkipUntil(tok::semi);
2314  return nullptr;
2315  }
2316 
2317  // TODO: recover from mistakenly-qualified operator declarations.
2318  if (ExpectAndConsume(tok::semi, diag::err_expected_after,
2319  "access declaration")) {
2320  SkipUntil(tok::semi);
2321  return nullptr;
2322  }
2323 
2325  getCurScope(), AS,
2326  /* HasUsingKeyword */ false, SourceLocation(), SS, Name,
2327  /* AttrList */ nullptr,
2328  /* HasTypenameKeyword */ false, SourceLocation())));
2329  }
2330  }
2331 
2332  // static_assert-declaration. A templated static_assert declaration is
2333  // diagnosed in Parser::ParseSingleDeclarationAfterTemplate.
2334  if (!TemplateInfo.Kind &&
2335  Tok.isOneOf(tok::kw_static_assert, tok::kw__Static_assert)) {
2336  SourceLocation DeclEnd;
2337  return DeclGroupPtrTy::make(
2338  DeclGroupRef(ParseStaticAssertDeclaration(DeclEnd)));
2339  }
2340 
2341  if (Tok.is(tok::kw_template)) {
2342  assert(!TemplateInfo.TemplateParams &&
2343  "Nested template improperly parsed?");
2344  SourceLocation DeclEnd;
2345  return DeclGroupPtrTy::make(
2346  DeclGroupRef(ParseDeclarationStartingWithTemplate(
2347  Declarator::MemberContext, DeclEnd, AS, AccessAttrs)));
2348  }
2349 
2350  // Handle: member-declaration ::= '__extension__' member-declaration
2351  if (Tok.is(tok::kw___extension__)) {
2352  // __extension__ silences extension warnings in the subexpression.
2353  ExtensionRAIIObject O(Diags); // Use RAII to do this.
2354  ConsumeToken();
2355  return ParseCXXClassMemberDeclaration(AS, AccessAttrs,
2356  TemplateInfo, TemplateDiags);
2357  }
2358 
2359  ParsedAttributesWithRange attrs(AttrFactory);
2360  ParsedAttributesWithRange FnAttrs(AttrFactory);
2361  // Optional C++11 attribute-specifier
2362  MaybeParseCXX11Attributes(attrs);
2363  // We need to keep these attributes for future diagnostic
2364  // before they are taken over by declaration specifier.
2365  FnAttrs.addAll(attrs.getList());
2366  FnAttrs.Range = attrs.Range;
2367 
2368  MaybeParseMicrosoftAttributes(attrs);
2369 
2370  if (Tok.is(tok::kw_using)) {
2371  ProhibitAttributes(attrs);
2372 
2373  // Eat 'using'.
2374  SourceLocation UsingLoc = ConsumeToken();
2375 
2376  if (Tok.is(tok::kw_namespace)) {
2377  Diag(UsingLoc, diag::err_using_namespace_in_class);
2378  SkipUntil(tok::semi, StopBeforeMatch);
2379  return nullptr;
2380  }
2381  SourceLocation DeclEnd;
2382  // Otherwise, it must be a using-declaration or an alias-declaration.
2383  return DeclGroupPtrTy::make(DeclGroupRef(ParseUsingDeclaration(
2384  Declarator::MemberContext, TemplateInfo, UsingLoc, DeclEnd, AS)));
2385  }
2386 
2387  // Hold late-parsed attributes so we can attach a Decl to them later.
2388  LateParsedAttrList CommonLateParsedAttrs;
2389 
2390  // decl-specifier-seq:
2391  // Parse the common declaration-specifiers piece.
2392  ParsingDeclSpec DS(*this, TemplateDiags);
2393  DS.takeAttributesFrom(attrs);
2394  if (MalformedTypeSpec)
2395  DS.SetTypeSpecError();
2396 
2397  ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC_class,
2398  &CommonLateParsedAttrs);
2399 
2400  // Turn off colon protection that was set for declspec.
2401  X.restore();
2402 
2403  // If we had a free-standing type definition with a missing semicolon, we
2404  // may get this far before the problem becomes obvious.
2405  if (DS.hasTagDefinition() &&
2406  TemplateInfo.Kind == ParsedTemplateInfo::NonTemplate &&
2407  DiagnoseMissingSemiAfterTagDefinition(DS, AS, DSC_class,
2408  &CommonLateParsedAttrs))
2409  return nullptr;
2410 
2411  MultiTemplateParamsArg TemplateParams(
2412  TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data()
2413  : nullptr,
2414  TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0);
2415 
2416  if (TryConsumeToken(tok::semi)) {
2417  if (DS.isFriendSpecified())
2418  ProhibitAttributes(FnAttrs);
2419 
2420  RecordDecl *AnonRecord = nullptr;
2421  Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(
2422  getCurScope(), AS, DS, TemplateParams, false, AnonRecord);
2423  DS.complete(TheDecl);
2424  if (AnonRecord) {
2425  Decl* decls[] = {AnonRecord, TheDecl};
2426  return Actions.BuildDeclaratorGroup(decls, /*TypeMayContainAuto=*/false);
2427  }
2428  return Actions.ConvertDeclToDeclGroup(TheDecl);
2429  }
2430 
2431  ParsingDeclarator DeclaratorInfo(*this, DS, Declarator::MemberContext);
2432  VirtSpecifiers VS;
2433 
2434  // Hold late-parsed attributes so we can attach a Decl to them later.
2435  LateParsedAttrList LateParsedAttrs;
2436 
2437  SourceLocation EqualLoc;
2438  SourceLocation PureSpecLoc;
2439 
2440  auto TryConsumePureSpecifier = [&] (bool AllowDefinition) {
2441  if (Tok.isNot(tok::equal))
2442  return false;
2443 
2444  auto &Zero = NextToken();
2446  if (Zero.isNot(tok::numeric_constant) || Zero.getLength() != 1 ||
2447  PP.getSpelling(Zero, Buffer) != "0")
2448  return false;
2449 
2450  auto &After = GetLookAheadToken(2);
2451  if (!After.isOneOf(tok::semi, tok::comma) &&
2452  !(AllowDefinition &&
2453  After.isOneOf(tok::l_brace, tok::colon, tok::kw_try)))
2454  return false;
2455 
2456  EqualLoc = ConsumeToken();
2457  PureSpecLoc = ConsumeToken();
2458  return true;
2459  };
2460 
2461  SmallVector<Decl *, 8> DeclsInGroup;
2462  ExprResult BitfieldSize;
2463  bool ExpectSemi = true;
2464 
2465  // Parse the first declarator.
2466  if (ParseCXXMemberDeclaratorBeforeInitializer(
2467  DeclaratorInfo, VS, BitfieldSize, LateParsedAttrs)) {
2468  TryConsumeToken(tok::semi);
2469  return nullptr;
2470  }
2471 
2472  // Check for a member function definition.
2473  if (BitfieldSize.isUnset()) {
2474  // MSVC permits pure specifier on inline functions defined at class scope.
2475  // Hence check for =0 before checking for function definition.
2476  if (getLangOpts().MicrosoftExt && DeclaratorInfo.isDeclarationOfFunction())
2477  TryConsumePureSpecifier(/*AllowDefinition*/ true);
2478 
2479  FunctionDefinitionKind DefinitionKind = FDK_Declaration;
2480  // function-definition:
2481  //
2482  // In C++11, a non-function declarator followed by an open brace is a
2483  // braced-init-list for an in-class member initialization, not an
2484  // erroneous function definition.
2485  if (Tok.is(tok::l_brace) && !getLangOpts().CPlusPlus11) {
2486  DefinitionKind = FDK_Definition;
2487  } else if (DeclaratorInfo.isFunctionDeclarator()) {
2488  if (Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try)) {
2489  DefinitionKind = FDK_Definition;
2490  } else if (Tok.is(tok::equal)) {
2491  const Token &KW = NextToken();
2492  if (KW.is(tok::kw_default))
2493  DefinitionKind = FDK_Defaulted;
2494  else if (KW.is(tok::kw_delete))
2495  DefinitionKind = FDK_Deleted;
2496  }
2497  }
2498  DeclaratorInfo.setFunctionDefinitionKind(DefinitionKind);
2499 
2500  // C++11 [dcl.attr.grammar] p4: If an attribute-specifier-seq appertains
2501  // to a friend declaration, that declaration shall be a definition.
2502  if (DeclaratorInfo.isFunctionDeclarator() &&
2503  DefinitionKind != FDK_Definition && DS.isFriendSpecified()) {
2504  // Diagnose attributes that appear before decl specifier:
2505  // [[]] friend int foo();
2506  ProhibitAttributes(FnAttrs);
2507  }
2508 
2509  if (DefinitionKind != FDK_Declaration) {
2510  if (!DeclaratorInfo.isFunctionDeclarator()) {
2511  Diag(DeclaratorInfo.getIdentifierLoc(), diag::err_func_def_no_params);
2512  ConsumeBrace();
2513  SkipUntil(tok::r_brace);
2514 
2515  // Consume the optional ';'
2516  TryConsumeToken(tok::semi);
2517 
2518  return nullptr;
2519  }
2520 
2522  Diag(DeclaratorInfo.getIdentifierLoc(),
2523  diag::err_function_declared_typedef);
2524 
2525  // Recover by treating the 'typedef' as spurious.
2527  }
2528 
2529  Decl *FunDecl =
2530  ParseCXXInlineMethodDef(AS, AccessAttrs, DeclaratorInfo, TemplateInfo,
2531  VS, PureSpecLoc);
2532 
2533  if (FunDecl) {
2534  for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) {
2535  CommonLateParsedAttrs[i]->addDecl(FunDecl);
2536  }
2537  for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) {
2538  LateParsedAttrs[i]->addDecl(FunDecl);
2539  }
2540  }
2541  LateParsedAttrs.clear();
2542 
2543  // Consume the ';' - it's optional unless we have a delete or default
2544  if (Tok.is(tok::semi))
2545  ConsumeExtraSemi(AfterMemberFunctionDefinition);
2546 
2547  return DeclGroupPtrTy::make(DeclGroupRef(FunDecl));
2548  }
2549  }
2550 
2551  // member-declarator-list:
2552  // member-declarator
2553  // member-declarator-list ',' member-declarator
2554 
2555  while (1) {
2556  InClassInitStyle HasInClassInit = ICIS_NoInit;
2557  bool HasStaticInitializer = false;
2558  if (Tok.isOneOf(tok::equal, tok::l_brace) && PureSpecLoc.isInvalid()) {
2559  if (BitfieldSize.get()) {
2560  Diag(Tok, diag::err_bitfield_member_init);
2561  SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
2562  } else if (DeclaratorInfo.isDeclarationOfFunction()) {
2563  // It's a pure-specifier.
2564  if (!TryConsumePureSpecifier(/*AllowFunctionDefinition*/ false))
2565  // Parse it as an expression so that Sema can diagnose it.
2566  HasStaticInitializer = true;
2567  } else if (DeclaratorInfo.getDeclSpec().getStorageClassSpec() !=
2569  DeclaratorInfo.getDeclSpec().getStorageClassSpec() !=
2571  !DS.isFriendSpecified()) {
2572  // It's a default member initializer.
2573  HasInClassInit = Tok.is(tok::equal) ? ICIS_CopyInit : ICIS_ListInit;
2574  } else {
2575  HasStaticInitializer = true;
2576  }
2577  }
2578 
2579  // NOTE: If Sema is the Action module and declarator is an instance field,
2580  // this call will *not* return the created decl; It will return null.
2581  // See Sema::ActOnCXXMemberDeclarator for details.
2582 
2583  NamedDecl *ThisDecl = nullptr;
2584  if (DS.isFriendSpecified()) {
2585  // C++11 [dcl.attr.grammar] p4: If an attribute-specifier-seq appertains
2586  // to a friend declaration, that declaration shall be a definition.
2587  //
2588  // Diagnose attributes that appear in a friend member function declarator:
2589  // friend int foo [[]] ();
2591  DeclaratorInfo.getCXX11AttributeRanges(Ranges);
2592  for (SmallVectorImpl<SourceRange>::iterator I = Ranges.begin(),
2593  E = Ranges.end(); I != E; ++I)
2594  Diag((*I).getBegin(), diag::err_attributes_not_allowed) << *I;
2595 
2596  ThisDecl = Actions.ActOnFriendFunctionDecl(getCurScope(), DeclaratorInfo,
2597  TemplateParams);
2598  } else {
2599  ThisDecl = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS,
2600  DeclaratorInfo,
2601  TemplateParams,
2602  BitfieldSize.get(),
2603  VS, HasInClassInit);
2604 
2605  if (VarTemplateDecl *VT =
2606  ThisDecl ? dyn_cast<VarTemplateDecl>(ThisDecl) : nullptr)
2607  // Re-direct this decl to refer to the templated decl so that we can
2608  // initialize it.
2609  ThisDecl = VT->getTemplatedDecl();
2610 
2611  if (ThisDecl && AccessAttrs)
2612  Actions.ProcessDeclAttributeList(getCurScope(), ThisDecl, AccessAttrs);
2613  }
2614 
2615  // Error recovery might have converted a non-static member into a static
2616  // member.
2617  if (HasInClassInit != ICIS_NoInit &&
2618  DeclaratorInfo.getDeclSpec().getStorageClassSpec() ==
2620  HasInClassInit = ICIS_NoInit;
2621  HasStaticInitializer = true;
2622  }
2623 
2624  if (ThisDecl && PureSpecLoc.isValid())
2625  Actions.ActOnPureSpecifier(ThisDecl, PureSpecLoc);
2626 
2627  // Handle the initializer.
2628  if (HasInClassInit != ICIS_NoInit) {
2629  // The initializer was deferred; parse it and cache the tokens.
2631  ? diag::warn_cxx98_compat_nonstatic_member_init
2632  : diag::ext_nonstatic_member_init);
2633 
2634  if (DeclaratorInfo.isArrayOfUnknownBound()) {
2635  // C++11 [dcl.array]p3: An array bound may also be omitted when the
2636  // declarator is followed by an initializer.
2637  //
2638  // A brace-or-equal-initializer for a member-declarator is not an
2639  // initializer in the grammar, so this is ill-formed.
2640  Diag(Tok, diag::err_incomplete_array_member_init);
2641  SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
2642 
2643  // Avoid later warnings about a class member of incomplete type.
2644  if (ThisDecl)
2645  ThisDecl->setInvalidDecl();
2646  } else
2647  ParseCXXNonStaticMemberInitializer(ThisDecl);
2648  } else if (HasStaticInitializer) {
2649  // Normal initializer.
2650  ExprResult Init = ParseCXXMemberInitializer(
2651  ThisDecl, DeclaratorInfo.isDeclarationOfFunction(), EqualLoc);
2652 
2653  if (Init.isInvalid())
2654  SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
2655  else if (ThisDecl)
2656  Actions.AddInitializerToDecl(ThisDecl, Init.get(), EqualLoc.isInvalid(),
2658  } else if (ThisDecl && DS.getStorageClassSpec() == DeclSpec::SCS_static)
2659  // No initializer.
2660  Actions.ActOnUninitializedDecl(ThisDecl, DS.containsPlaceholderType());
2661 
2662  if (ThisDecl) {
2663  if (!ThisDecl->isInvalidDecl()) {
2664  // Set the Decl for any late parsed attributes
2665  for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i)
2666  CommonLateParsedAttrs[i]->addDecl(ThisDecl);
2667 
2668  for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i)
2669  LateParsedAttrs[i]->addDecl(ThisDecl);
2670  }
2671  Actions.FinalizeDeclaration(ThisDecl);
2672  DeclsInGroup.push_back(ThisDecl);
2673 
2674  if (DeclaratorInfo.isFunctionDeclarator() &&
2675  DeclaratorInfo.getDeclSpec().getStorageClassSpec() !=
2677  HandleMemberFunctionDeclDelays(DeclaratorInfo, ThisDecl);
2678  }
2679  LateParsedAttrs.clear();
2680 
2681  DeclaratorInfo.complete(ThisDecl);
2682 
2683  // If we don't have a comma, it is either the end of the list (a ';')
2684  // or an error, bail out.
2685  SourceLocation CommaLoc;
2686  if (!TryConsumeToken(tok::comma, CommaLoc))
2687  break;
2688 
2689  if (Tok.isAtStartOfLine() &&
2690  !MightBeDeclarator(Declarator::MemberContext)) {
2691  // This comma was followed by a line-break and something which can't be
2692  // the start of a declarator. The comma was probably a typo for a
2693  // semicolon.
2694  Diag(CommaLoc, diag::err_expected_semi_declaration)
2695  << FixItHint::CreateReplacement(CommaLoc, ";");
2696  ExpectSemi = false;
2697  break;
2698  }
2699 
2700  // Parse the next declarator.
2701  DeclaratorInfo.clear();
2702  VS.clear();
2703  BitfieldSize = ExprResult(/*Invalid=*/false);
2704  EqualLoc = PureSpecLoc = SourceLocation();
2705  DeclaratorInfo.setCommaLoc(CommaLoc);
2706 
2707  // GNU attributes are allowed before the second and subsequent declarator.
2708  MaybeParseGNUAttributes(DeclaratorInfo);
2709 
2710  if (ParseCXXMemberDeclaratorBeforeInitializer(
2711  DeclaratorInfo, VS, BitfieldSize, LateParsedAttrs))
2712  break;
2713  }
2714 
2715  if (ExpectSemi &&
2716  ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list)) {
2717  // Skip to end of block or statement.
2718  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
2719  // If we stopped at a ';', eat it.
2720  TryConsumeToken(tok::semi);
2721  return nullptr;
2722  }
2723 
2724  return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup);
2725 }
2726 
2727 /// ParseCXXMemberInitializer - Parse the brace-or-equal-initializer.
2728 /// Also detect and reject any attempted defaulted/deleted function definition.
2729 /// The location of the '=', if any, will be placed in EqualLoc.
2730 ///
2731 /// This does not check for a pure-specifier; that's handled elsewhere.
2732 ///
2733 /// brace-or-equal-initializer:
2734 /// '=' initializer-expression
2735 /// braced-init-list
2736 ///
2737 /// initializer-clause:
2738 /// assignment-expression
2739 /// braced-init-list
2740 ///
2741 /// defaulted/deleted function-definition:
2742 /// '=' 'default'
2743 /// '=' 'delete'
2744 ///
2745 /// Prior to C++0x, the assignment-expression in an initializer-clause must
2746 /// be a constant-expression.
2747 ExprResult Parser::ParseCXXMemberInitializer(Decl *D, bool IsFunction,
2748  SourceLocation &EqualLoc) {
2749  assert(Tok.isOneOf(tok::equal, tok::l_brace)
2750  && "Data member initializer not starting with '=' or '{'");
2751 
2754  D);
2755  if (TryConsumeToken(tok::equal, EqualLoc)) {
2756  if (Tok.is(tok::kw_delete)) {
2757  // In principle, an initializer of '= delete p;' is legal, but it will
2758  // never type-check. It's better to diagnose it as an ill-formed expression
2759  // than as an ill-formed deleted non-function member.
2760  // An initializer of '= delete p, foo' will never be parsed, because
2761  // a top-level comma always ends the initializer expression.
2762  const Token &Next = NextToken();
2763  if (IsFunction || Next.isOneOf(tok::semi, tok::comma, tok::eof)) {
2764  if (IsFunction)
2765  Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
2766  << 1 /* delete */;
2767  else
2768  Diag(ConsumeToken(), diag::err_deleted_non_function);
2769  return ExprError();
2770  }
2771  } else if (Tok.is(tok::kw_default)) {
2772  if (IsFunction)
2773  Diag(Tok, diag::err_default_delete_in_multiple_declaration)
2774  << 0 /* default */;
2775  else
2776  Diag(ConsumeToken(), diag::err_default_special_members);
2777  return ExprError();
2778  }
2779  }
2780  if (const auto *PD = dyn_cast_or_null<MSPropertyDecl>(D)) {
2781  Diag(Tok, diag::err_ms_property_initializer) << PD;
2782  return ExprError();
2783  }
2784  return ParseInitializer();
2785 }
2786 
2787 void Parser::SkipCXXMemberSpecification(SourceLocation RecordLoc,
2788  SourceLocation AttrFixitLoc,
2789  unsigned TagType, Decl *TagDecl) {
2790  // Skip the optional 'final' keyword.
2791  if (getLangOpts().CPlusPlus && Tok.is(tok::identifier)) {
2792  assert(isCXX11FinalKeyword() && "not a class definition");
2793  ConsumeToken();
2794 
2795  // Diagnose any C++11 attributes after 'final' keyword.
2796  // We deliberately discard these attributes.
2797  ParsedAttributesWithRange Attrs(AttrFactory);
2798  CheckMisplacedCXX11Attribute(Attrs, AttrFixitLoc);
2799 
2800  // This can only happen if we had malformed misplaced attributes;
2801  // we only get called if there is a colon or left-brace after the
2802  // attributes.
2803  if (Tok.isNot(tok::colon) && Tok.isNot(tok::l_brace))
2804  return;
2805  }
2806 
2807  // Skip the base clauses. This requires actually parsing them, because
2808  // otherwise we can't be sure where they end (a left brace may appear
2809  // within a template argument).
2810  if (Tok.is(tok::colon)) {
2811  // Enter the scope of the class so that we can correctly parse its bases.
2812  ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope);
2813  ParsingClassDefinition ParsingDef(*this, TagDecl, /*NonNestedClass*/ true,
2814  TagType == DeclSpec::TST_interface);
2815  auto OldContext =
2816  Actions.ActOnTagStartSkippedDefinition(getCurScope(), TagDecl);
2817 
2818  // Parse the bases but don't attach them to the class.
2819  ParseBaseClause(nullptr);
2820 
2821  Actions.ActOnTagFinishSkippedDefinition(OldContext);
2822 
2823  if (!Tok.is(tok::l_brace)) {
2824  Diag(PP.getLocForEndOfToken(PrevTokLocation),
2825  diag::err_expected_lbrace_after_base_specifiers);
2826  return;
2827  }
2828  }
2829 
2830  // Skip the body.
2831  assert(Tok.is(tok::l_brace));
2832  BalancedDelimiterTracker T(*this, tok::l_brace);
2833  T.consumeOpen();
2834  T.skipToEnd();
2835 
2836  // Parse and discard any trailing attributes.
2837  ParsedAttributes Attrs(AttrFactory);
2838  if (Tok.is(tok::kw___attribute))
2839  MaybeParseGNUAttributes(Attrs);
2840 }
2841 
2842 Parser::DeclGroupPtrTy Parser::ParseCXXClassMemberDeclarationWithPragmas(
2843  AccessSpecifier &AS, ParsedAttributesWithRange &AccessAttrs,
2844  DeclSpec::TST TagType, Decl *TagDecl) {
2845  if (getLangOpts().MicrosoftExt &&
2846  Tok.isOneOf(tok::kw___if_exists, tok::kw___if_not_exists)) {
2847  ParseMicrosoftIfExistsClassDeclaration(TagType, AS);
2848  return nullptr;
2849  }
2850 
2851  // Check for extraneous top-level semicolon.
2852  if (Tok.is(tok::semi)) {
2853  ConsumeExtraSemi(InsideStruct, TagType);
2854  return nullptr;
2855  }
2856 
2857  if (Tok.is(tok::annot_pragma_vis)) {
2858  HandlePragmaVisibility();
2859  return nullptr;
2860  }
2861 
2862  if (Tok.is(tok::annot_pragma_pack)) {
2863  HandlePragmaPack();
2864  return nullptr;
2865  }
2866 
2867  if (Tok.is(tok::annot_pragma_align)) {
2868  HandlePragmaAlign();
2869  return nullptr;
2870  }
2871 
2872  if (Tok.is(tok::annot_pragma_ms_pointers_to_members)) {
2873  HandlePragmaMSPointersToMembers();
2874  return nullptr;
2875  }
2876 
2877  if (Tok.is(tok::annot_pragma_ms_pragma)) {
2878  HandlePragmaMSPragma();
2879  return nullptr;
2880  }
2881 
2882  if (Tok.is(tok::annot_pragma_ms_vtordisp)) {
2883  HandlePragmaMSVtorDisp();
2884  return nullptr;
2885  }
2886 
2887  // If we see a namespace here, a close brace was missing somewhere.
2888  if (Tok.is(tok::kw_namespace)) {
2889  DiagnoseUnexpectedNamespace(cast<NamedDecl>(TagDecl));
2890  return nullptr;
2891  }
2892 
2893  AccessSpecifier NewAS = getAccessSpecifierIfPresent();
2894  if (NewAS != AS_none) {
2895  // Current token is a C++ access specifier.
2896  AS = NewAS;
2897  SourceLocation ASLoc = Tok.getLocation();
2898  unsigned TokLength = Tok.getLength();
2899  ConsumeToken();
2900  AccessAttrs.clear();
2901  MaybeParseGNUAttributes(AccessAttrs);
2902 
2903  SourceLocation EndLoc;
2904  if (TryConsumeToken(tok::colon, EndLoc)) {
2905  } else if (TryConsumeToken(tok::semi, EndLoc)) {
2906  Diag(EndLoc, diag::err_expected)
2907  << tok::colon << FixItHint::CreateReplacement(EndLoc, ":");
2908  } else {
2909  EndLoc = ASLoc.getLocWithOffset(TokLength);
2910  Diag(EndLoc, diag::err_expected)
2911  << tok::colon << FixItHint::CreateInsertion(EndLoc, ":");
2912  }
2913 
2914  // The Microsoft extension __interface does not permit non-public
2915  // access specifiers.
2916  if (TagType == DeclSpec::TST_interface && AS != AS_public) {
2917  Diag(ASLoc, diag::err_access_specifier_interface) << (AS == AS_protected);
2918  }
2919 
2920  if (Actions.ActOnAccessSpecifier(NewAS, ASLoc, EndLoc,
2921  AccessAttrs.getList())) {
2922  // found another attribute than only annotations
2923  AccessAttrs.clear();
2924  }
2925 
2926  return nullptr;
2927  }
2928 
2929  if (Tok.is(tok::annot_pragma_openmp))
2930  return ParseOpenMPDeclarativeDirectiveWithExtDecl(AS, AccessAttrs, TagType,
2931  TagDecl);
2932 
2933  // Parse all the comma separated declarators.
2934  return ParseCXXClassMemberDeclaration(AS, AccessAttrs.getList());
2935 }
2936 
2937 /// ParseCXXMemberSpecification - Parse the class definition.
2938 ///
2939 /// member-specification:
2940 /// member-declaration member-specification[opt]
2941 /// access-specifier ':' member-specification[opt]
2942 ///
2943 void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc,
2944  SourceLocation AttrFixitLoc,
2945  ParsedAttributesWithRange &Attrs,
2946  unsigned TagType, Decl *TagDecl) {
2947  assert((TagType == DeclSpec::TST_struct ||
2948  TagType == DeclSpec::TST_interface ||
2949  TagType == DeclSpec::TST_union ||
2950  TagType == DeclSpec::TST_class) && "Invalid TagType!");
2951 
2952  PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc,
2953  "parsing struct/union/class body");
2954 
2955  // Determine whether this is a non-nested class. Note that local
2956  // classes are *not* considered to be nested classes.
2957  bool NonNestedClass = true;
2958  if (!ClassStack.empty()) {
2959  for (const Scope *S = getCurScope(); S; S = S->getParent()) {
2960  if (S->isClassScope()) {
2961  // We're inside a class scope, so this is a nested class.
2962  NonNestedClass = false;
2963 
2964  // The Microsoft extension __interface does not permit nested classes.
2965  if (getCurrentClass().IsInterface) {
2966  Diag(RecordLoc, diag::err_invalid_member_in_interface)
2967  << /*ErrorType=*/6
2968  << (isa<NamedDecl>(TagDecl)
2969  ? cast<NamedDecl>(TagDecl)->getQualifiedNameAsString()
2970  : "(anonymous)");
2971  }
2972  break;
2973  }
2974 
2975  if ((S->getFlags() & Scope::FnScope))
2976  // If we're in a function or function template then this is a local
2977  // class rather than a nested class.
2978  break;
2979  }
2980  }
2981 
2982  // Enter a scope for the class.
2983  ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope);
2984 
2985  // Note that we are parsing a new (potentially-nested) class definition.
2986  ParsingClassDefinition ParsingDef(*this, TagDecl, NonNestedClass,
2987  TagType == DeclSpec::TST_interface);
2988 
2989  if (TagDecl)
2990  Actions.ActOnTagStartDefinition(getCurScope(), TagDecl);
2991 
2992  SourceLocation FinalLoc;
2993  bool IsFinalSpelledSealed = false;
2994 
2995  // Parse the optional 'final' keyword.
2996  if (getLangOpts().CPlusPlus && Tok.is(tok::identifier)) {
2997  VirtSpecifiers::Specifier Specifier = isCXX11VirtSpecifier(Tok);
2998  assert((Specifier == VirtSpecifiers::VS_Final ||
2999  Specifier == VirtSpecifiers::VS_Sealed) &&
3000  "not a class definition");
3001  FinalLoc = ConsumeToken();
3002  IsFinalSpelledSealed = Specifier == VirtSpecifiers::VS_Sealed;
3003 
3004  if (TagType == DeclSpec::TST_interface)
3005  Diag(FinalLoc, diag::err_override_control_interface)
3006  << VirtSpecifiers::getSpecifierName(Specifier);
3007  else if (Specifier == VirtSpecifiers::VS_Final)
3008  Diag(FinalLoc, getLangOpts().CPlusPlus11
3009  ? diag::warn_cxx98_compat_override_control_keyword
3010  : diag::ext_override_control_keyword)
3011  << VirtSpecifiers::getSpecifierName(Specifier);
3012  else if (Specifier == VirtSpecifiers::VS_Sealed)
3013  Diag(FinalLoc, diag::ext_ms_sealed_keyword);
3014 
3015  // Parse any C++11 attributes after 'final' keyword.
3016  // These attributes are not allowed to appear here,
3017  // and the only possible place for them to appertain
3018  // to the class would be between class-key and class-name.
3019  CheckMisplacedCXX11Attribute(Attrs, AttrFixitLoc);
3020 
3021  // ParseClassSpecifier() does only a superficial check for attributes before
3022  // deciding to call this method. For example, for
3023  // `class C final alignas ([l) {` it will decide that this looks like a
3024  // misplaced attribute since it sees `alignas '(' ')'`. But the actual
3025  // attribute parsing code will try to parse the '[' as a constexpr lambda
3026  // and consume enough tokens that the alignas parsing code will eat the
3027  // opening '{'. So bail out if the next token isn't one we expect.
3028  if (!Tok.is(tok::colon) && !Tok.is(tok::l_brace)) {
3029  if (TagDecl)
3030  Actions.ActOnTagDefinitionError(getCurScope(), TagDecl);
3031  return;
3032  }
3033  }
3034 
3035  if (Tok.is(tok::colon)) {
3036  ParseBaseClause(TagDecl);
3037  if (!Tok.is(tok::l_brace)) {
3038  bool SuggestFixIt = false;
3039  SourceLocation BraceLoc = PP.getLocForEndOfToken(PrevTokLocation);
3040  if (Tok.isAtStartOfLine()) {
3041  switch (Tok.getKind()) {
3042  case tok::kw_private:
3043  case tok::kw_protected:
3044  case tok::kw_public:
3045  SuggestFixIt = NextToken().getKind() == tok::colon;
3046  break;
3047  case tok::kw_static_assert:
3048  case tok::r_brace:
3049  case tok::kw_using:
3050  // base-clause can have simple-template-id; 'template' can't be there
3051  case tok::kw_template:
3052  SuggestFixIt = true;
3053  break;
3054  case tok::identifier:
3055  SuggestFixIt = isConstructorDeclarator(true);
3056  break;
3057  default:
3058  SuggestFixIt = isCXXSimpleDeclaration(/*AllowForRangeDecl=*/false);
3059  break;
3060  }
3061  }
3062  DiagnosticBuilder LBraceDiag =
3063  Diag(BraceLoc, diag::err_expected_lbrace_after_base_specifiers);
3064  if (SuggestFixIt) {
3065  LBraceDiag << FixItHint::CreateInsertion(BraceLoc, " {");
3066  // Try recovering from missing { after base-clause.
3067  PP.EnterToken(Tok);
3068  Tok.setKind(tok::l_brace);
3069  } else {
3070  if (TagDecl)
3071  Actions.ActOnTagDefinitionError(getCurScope(), TagDecl);
3072  return;
3073  }
3074  }
3075  }
3076 
3077  assert(Tok.is(tok::l_brace));
3078  BalancedDelimiterTracker T(*this, tok::l_brace);
3079  T.consumeOpen();
3080 
3081  if (TagDecl)
3082  Actions.ActOnStartCXXMemberDeclarations(getCurScope(), TagDecl, FinalLoc,
3083  IsFinalSpelledSealed,
3084  T.getOpenLocation());
3085 
3086  // C++ 11p3: Members of a class defined with the keyword class are private
3087  // by default. Members of a class defined with the keywords struct or union
3088  // are public by default.
3089  AccessSpecifier CurAS;
3090  if (TagType == DeclSpec::TST_class)
3091  CurAS = AS_private;
3092  else
3093  CurAS = AS_public;
3094  ParsedAttributesWithRange AccessAttrs(AttrFactory);
3095 
3096  if (TagDecl) {
3097  // While we still have something to read, read the member-declarations.
3098  while (!tryParseMisplacedModuleImport() && Tok.isNot(tok::r_brace) &&
3099  Tok.isNot(tok::eof)) {
3100  // Each iteration of this loop reads one member-declaration.
3101  ParseCXXClassMemberDeclarationWithPragmas(
3102  CurAS, AccessAttrs, static_cast<DeclSpec::TST>(TagType), TagDecl);
3103  }
3104  T.consumeClose();
3105  } else {
3106  SkipUntil(tok::r_brace);
3107  }
3108 
3109  // If attributes exist after class contents, parse them.
3110  ParsedAttributes attrs(AttrFactory);
3111  MaybeParseGNUAttributes(attrs);
3112 
3113  if (TagDecl)
3114  Actions.ActOnFinishCXXMemberSpecification(getCurScope(), RecordLoc, TagDecl,
3115  T.getOpenLocation(),
3116  T.getCloseLocation(),
3117  attrs.getList());
3118 
3119  // C++11 [class.mem]p2:
3120  // Within the class member-specification, the class is regarded as complete
3121  // within function bodies, default arguments, exception-specifications, and
3122  // brace-or-equal-initializers for non-static data members (including such
3123  // things in nested classes).
3124  if (TagDecl && NonNestedClass) {
3125  // We are not inside a nested class. This class and its nested classes
3126  // are complete and we can parse the delayed portions of method
3127  // declarations and the lexed inline method definitions, along with any
3128  // delayed attributes.
3129  SourceLocation SavedPrevTokLocation = PrevTokLocation;
3130  ParseLexedAttributes(getCurrentClass());
3131  ParseLexedMethodDeclarations(getCurrentClass());
3132 
3133  // We've finished with all pending member declarations.
3134  Actions.ActOnFinishCXXMemberDecls();
3135 
3136  ParseLexedMemberInitializers(getCurrentClass());
3137  ParseLexedMethodDefs(getCurrentClass());
3138  PrevTokLocation = SavedPrevTokLocation;
3139 
3140  // We've finished parsing everything, including default argument
3141  // initializers.
3142  Actions.ActOnFinishCXXNonNestedClass(TagDecl);
3143  }
3144 
3145  if (TagDecl)
3146  Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl, T.getRange());
3147 
3148  // Leave the class scope.
3149  ParsingDef.Pop();
3150  ClassScope.Exit();
3151 }
3152 
3153 void Parser::DiagnoseUnexpectedNamespace(NamedDecl *D) {
3154  assert(Tok.is(tok::kw_namespace));
3155 
3156  // FIXME: Suggest where the close brace should have gone by looking
3157  // at indentation changes within the definition body.
3158  Diag(D->getLocation(),
3159  diag::err_missing_end_of_definition) << D;
3160  Diag(Tok.getLocation(),
3161  diag::note_missing_end_of_definition_before) << D;
3162 
3163  // Push '};' onto the token stream to recover.
3164  PP.EnterToken(Tok);
3165 
3166  Tok.startToken();
3167  Tok.setLocation(PP.getLocForEndOfToken(PrevTokLocation));
3168  Tok.setKind(tok::semi);
3169  PP.EnterToken(Tok);
3170 
3171  Tok.setKind(tok::r_brace);
3172 }
3173 
3174 /// ParseConstructorInitializer - Parse a C++ constructor initializer,
3175 /// which explicitly initializes the members or base classes of a
3176 /// class (C++ [class.base.init]). For example, the three initializers
3177 /// after the ':' in the Derived constructor below:
3178 ///
3179 /// @code
3180 /// class Base { };
3181 /// class Derived : Base {
3182 /// int x;
3183 /// float f;
3184 /// public:
3185 /// Derived(float f) : Base(), x(17), f(f) { }
3186 /// };
3187 /// @endcode
3188 ///
3189 /// [C++] ctor-initializer:
3190 /// ':' mem-initializer-list
3191 ///
3192 /// [C++] mem-initializer-list:
3193 /// mem-initializer ...[opt]
3194 /// mem-initializer ...[opt] , mem-initializer-list
3195 void Parser::ParseConstructorInitializer(Decl *ConstructorDecl) {
3196  assert(Tok.is(tok::colon) &&
3197  "Constructor initializer always starts with ':'");
3198 
3199  // Poison the SEH identifiers so they are flagged as illegal in constructor
3200  // initializers.
3201  PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true);
3203 
3204  SmallVector<CXXCtorInitializer*, 4> MemInitializers;
3205  bool AnyErrors = false;
3206 
3207  do {
3208  if (Tok.is(tok::code_completion)) {
3209  Actions.CodeCompleteConstructorInitializer(ConstructorDecl,
3210  MemInitializers);
3211  return cutOffParsing();
3212  }
3213 
3214  MemInitResult MemInit = ParseMemInitializer(ConstructorDecl);
3215  if (!MemInit.isInvalid())
3216  MemInitializers.push_back(MemInit.get());
3217  else
3218  AnyErrors = true;
3219 
3220  if (Tok.is(tok::comma))
3221  ConsumeToken();
3222  else if (Tok.is(tok::l_brace))
3223  break;
3224  // If the previous initializer was valid and the next token looks like a
3225  // base or member initializer, assume that we're just missing a comma.
3226  else if (!MemInit.isInvalid() &&
3227  Tok.isOneOf(tok::identifier, tok::coloncolon)) {
3228  SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation);
3229  Diag(Loc, diag::err_ctor_init_missing_comma)
3230  << FixItHint::CreateInsertion(Loc, ", ");
3231  } else {
3232  // Skip over garbage, until we get to '{'. Don't eat the '{'.
3233  if (!MemInit.isInvalid())
3234  Diag(Tok.getLocation(), diag::err_expected_either) << tok::l_brace
3235  << tok::comma;
3236  SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
3237  break;
3238  }
3239  } while (true);
3240 
3241  Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, MemInitializers,
3242  AnyErrors);
3243 }
3244 
3245 /// ParseMemInitializer - Parse a C++ member initializer, which is
3246 /// part of a constructor initializer that explicitly initializes one
3247 /// member or base class (C++ [class.base.init]). See
3248 /// ParseConstructorInitializer for an example.
3249 ///
3250 /// [C++] mem-initializer:
3251 /// mem-initializer-id '(' expression-list[opt] ')'
3252 /// [C++0x] mem-initializer-id braced-init-list
3253 ///
3254 /// [C++] mem-initializer-id:
3255 /// '::'[opt] nested-name-specifier[opt] class-name
3256 /// identifier
3257 MemInitResult Parser::ParseMemInitializer(Decl *ConstructorDecl) {
3258  // parse '::'[opt] nested-name-specifier[opt]
3259  CXXScopeSpec SS;
3260  ParseOptionalCXXScopeSpecifier(SS, nullptr, /*EnteringContext=*/false);
3261  ParsedType TemplateTypeTy;
3262  if (Tok.is(tok::annot_template_id)) {
3263  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
3264  if (TemplateId->Kind == TNK_Type_template ||
3265  TemplateId->Kind == TNK_Dependent_template_name) {
3266  AnnotateTemplateIdTokenAsType();
3267  assert(Tok.is(tok::annot_typename) && "template-id -> type failed");
3268  TemplateTypeTy = getTypeAnnotation(Tok);
3269  }
3270  }
3271  // Uses of decltype will already have been converted to annot_decltype by
3272  // ParseOptionalCXXScopeSpecifier at this point.
3273  if (!TemplateTypeTy && Tok.isNot(tok::identifier)
3274  && Tok.isNot(tok::annot_decltype)) {
3275  Diag(Tok, diag::err_expected_member_or_base_name);
3276  return true;
3277  }
3278 
3279  IdentifierInfo *II = nullptr;
3280  DeclSpec DS(AttrFactory);
3281  SourceLocation IdLoc = Tok.getLocation();
3282  if (Tok.is(tok::annot_decltype)) {
3283  // Get the decltype expression, if there is one.
3284  ParseDecltypeSpecifier(DS);
3285  } else {
3286  if (Tok.is(tok::identifier))
3287  // Get the identifier. This may be a member name or a class name,
3288  // but we'll let the semantic analysis determine which it is.
3289  II = Tok.getIdentifierInfo();
3290  ConsumeToken();
3291  }
3292 
3293 
3294  // Parse the '('.
3295  if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
3296  Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
3297 
3298  ExprResult InitList = ParseBraceInitializer();
3299  if (InitList.isInvalid())
3300  return true;
3301 
3302  SourceLocation EllipsisLoc;
3303  TryConsumeToken(tok::ellipsis, EllipsisLoc);
3304 
3305  return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II,
3306  TemplateTypeTy, DS, IdLoc,
3307  InitList.get(), EllipsisLoc);
3308  } else if(Tok.is(tok::l_paren)) {
3309  BalancedDelimiterTracker T(*this, tok::l_paren);
3310  T.consumeOpen();
3311 
3312  // Parse the optional expression-list.
3313  ExprVector ArgExprs;
3314  CommaLocsTy CommaLocs;
3315  if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) {
3316  SkipUntil(tok::r_paren, StopAtSemi);
3317  return true;
3318  }
3319 
3320  T.consumeClose();
3321 
3322  SourceLocation EllipsisLoc;
3323  TryConsumeToken(tok::ellipsis, EllipsisLoc);
3324 
3325  return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II,
3326  TemplateTypeTy, DS, IdLoc,
3327  T.getOpenLocation(), ArgExprs,
3328  T.getCloseLocation(), EllipsisLoc);
3329  }
3330 
3331  if (getLangOpts().CPlusPlus11)
3332  return Diag(Tok, diag::err_expected_either) << tok::l_paren << tok::l_brace;
3333  else
3334  return Diag(Tok, diag::err_expected) << tok::l_paren;
3335 }
3336 
3337 /// \brief Parse a C++ exception-specification if present (C++0x [except.spec]).
3338 ///
3339 /// exception-specification:
3340 /// dynamic-exception-specification
3341 /// noexcept-specification
3342 ///
3343 /// noexcept-specification:
3344 /// 'noexcept'
3345 /// 'noexcept' '(' constant-expression ')'
3347 Parser::tryParseExceptionSpecification(bool Delayed,
3348  SourceRange &SpecificationRange,
3349  SmallVectorImpl<ParsedType> &DynamicExceptions,
3350  SmallVectorImpl<SourceRange> &DynamicExceptionRanges,
3351  ExprResult &NoexceptExpr,
3352  CachedTokens *&ExceptionSpecTokens) {
3354  ExceptionSpecTokens = nullptr;
3355 
3356  // Handle delayed parsing of exception-specifications.
3357  if (Delayed) {
3358  if (Tok.isNot(tok::kw_throw) && Tok.isNot(tok::kw_noexcept))
3359  return EST_None;
3360 
3361  // Consume and cache the starting token.
3362  bool IsNoexcept = Tok.is(tok::kw_noexcept);
3363  Token StartTok = Tok;
3364  SpecificationRange = SourceRange(ConsumeToken());
3365 
3366  // Check for a '('.
3367  if (!Tok.is(tok::l_paren)) {
3368  // If this is a bare 'noexcept', we're done.
3369  if (IsNoexcept) {
3370  Diag(Tok, diag::warn_cxx98_compat_noexcept_decl);
3371  NoexceptExpr = nullptr;
3372  return EST_BasicNoexcept;
3373  }
3374 
3375  Diag(Tok, diag::err_expected_lparen_after) << "throw";
3376  return EST_DynamicNone;
3377  }
3378 
3379  // Cache the tokens for the exception-specification.
3380  ExceptionSpecTokens = new CachedTokens;
3381  ExceptionSpecTokens->push_back(StartTok); // 'throw' or 'noexcept'
3382  ExceptionSpecTokens->push_back(Tok); // '('
3383  SpecificationRange.setEnd(ConsumeParen()); // '('
3384 
3385  ConsumeAndStoreUntil(tok::r_paren, *ExceptionSpecTokens,
3386  /*StopAtSemi=*/true,
3387  /*ConsumeFinalToken=*/true);
3388  SpecificationRange.setEnd(ExceptionSpecTokens->back().getLocation());
3389 
3390  return EST_Unparsed;
3391  }
3392 
3393  // See if there's a dynamic specification.
3394  if (Tok.is(tok::kw_throw)) {
3395  Result = ParseDynamicExceptionSpecification(SpecificationRange,
3396  DynamicExceptions,
3397  DynamicExceptionRanges);
3398  assert(DynamicExceptions.size() == DynamicExceptionRanges.size() &&
3399  "Produced different number of exception types and ranges.");
3400  }
3401 
3402  // If there's no noexcept specification, we're done.
3403  if (Tok.isNot(tok::kw_noexcept))
3404  return Result;
3405 
3406  Diag(Tok, diag::warn_cxx98_compat_noexcept_decl);
3407 
3408  // If we already had a dynamic specification, parse the noexcept for,
3409  // recovery, but emit a diagnostic and don't store the results.
3410  SourceRange NoexceptRange;
3411  ExceptionSpecificationType NoexceptType = EST_None;
3412 
3413  SourceLocation KeywordLoc = ConsumeToken();
3414  if (Tok.is(tok::l_paren)) {
3415  // There is an argument.
3416  BalancedDelimiterTracker T(*this, tok::l_paren);
3417  T.consumeOpen();
3418  NoexceptType = EST_ComputedNoexcept;
3419  NoexceptExpr = ParseConstantExpression();
3420  T.consumeClose();
3421  // The argument must be contextually convertible to bool. We use
3422  // CheckBooleanCondition for this purpose.
3423  // FIXME: Add a proper Sema entry point for this.
3424  if (!NoexceptExpr.isInvalid()) {
3425  NoexceptExpr =
3426  Actions.CheckBooleanCondition(KeywordLoc, NoexceptExpr.get());
3427  NoexceptRange = SourceRange(KeywordLoc, T.getCloseLocation());
3428  } else {
3429  NoexceptType = EST_None;
3430  }
3431  } else {
3432  // There is no argument.
3433  NoexceptType = EST_BasicNoexcept;
3434  NoexceptRange = SourceRange(KeywordLoc, KeywordLoc);
3435  }
3436 
3437  if (Result == EST_None) {
3438  SpecificationRange = NoexceptRange;
3439  Result = NoexceptType;
3440 
3441  // If there's a dynamic specification after a noexcept specification,
3442  // parse that and ignore the results.
3443  if (Tok.is(tok::kw_throw)) {
3444  Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification);
3445  ParseDynamicExceptionSpecification(NoexceptRange, DynamicExceptions,
3446  DynamicExceptionRanges);
3447  }
3448  } else {
3449  Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification);
3450  }
3451 
3452  return Result;
3453 }
3454 
3456  Parser &P, SourceRange Range, bool IsNoexcept) {
3457  if (P.getLangOpts().CPlusPlus11) {
3458  const char *Replacement = IsNoexcept ? "noexcept" : "noexcept(false)";
3459  P.Diag(Range.getBegin(), diag::warn_exception_spec_deprecated) << Range;
3460  P.Diag(Range.getBegin(), diag::note_exception_spec_deprecated)
3461  << Replacement << FixItHint::CreateReplacement(Range, Replacement);
3462  }
3463 }
3464 
3465 /// ParseDynamicExceptionSpecification - Parse a C++
3466 /// dynamic-exception-specification (C++ [except.spec]).
3467 ///
3468 /// dynamic-exception-specification:
3469 /// 'throw' '(' type-id-list [opt] ')'
3470 /// [MS] 'throw' '(' '...' ')'
3471 ///
3472 /// type-id-list:
3473 /// type-id ... [opt]
3474 /// type-id-list ',' type-id ... [opt]
3475 ///
3476 ExceptionSpecificationType Parser::ParseDynamicExceptionSpecification(
3477  SourceRange &SpecificationRange,
3478  SmallVectorImpl<ParsedType> &Exceptions,
3479  SmallVectorImpl<SourceRange> &Ranges) {
3480  assert(Tok.is(tok::kw_throw) && "expected throw");
3481 
3482  SpecificationRange.setBegin(ConsumeToken());
3483  BalancedDelimiterTracker T(*this, tok::l_paren);
3484  if (T.consumeOpen()) {
3485  Diag(Tok, diag::err_expected_lparen_after) << "throw";
3486  SpecificationRange.setEnd(SpecificationRange.getBegin());
3487  return EST_DynamicNone;
3488  }
3489 
3490  // Parse throw(...), a Microsoft extension that means "this function
3491  // can throw anything".
3492  if (Tok.is(tok::ellipsis)) {
3493  SourceLocation EllipsisLoc = ConsumeToken();
3494  if (!getLangOpts().MicrosoftExt)
3495  Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec);
3496  T.consumeClose();
3497  SpecificationRange.setEnd(T.getCloseLocation());
3498  diagnoseDynamicExceptionSpecification(*this, SpecificationRange, false);
3499  return EST_MSAny;
3500  }
3501 
3502  // Parse the sequence of type-ids.
3503  SourceRange Range;
3504  while (Tok.isNot(tok::r_paren)) {
3505  TypeResult Res(ParseTypeName(&Range));
3506 
3507  if (Tok.is(tok::ellipsis)) {
3508  // C++0x [temp.variadic]p5:
3509  // - In a dynamic-exception-specification (15.4); the pattern is a
3510  // type-id.
3511  SourceLocation Ellipsis = ConsumeToken();
3512  Range.setEnd(Ellipsis);
3513  if (!Res.isInvalid())
3514  Res = Actions.ActOnPackExpansion(Res.get(), Ellipsis);
3515  }
3516 
3517  if (!Res.isInvalid()) {
3518  Exceptions.push_back(Res.get());
3519  Ranges.push_back(Range);
3520  }
3521 
3522  if (!TryConsumeToken(tok::comma))
3523  break;
3524  }
3525 
3526  T.consumeClose();
3527  SpecificationRange.setEnd(T.getCloseLocation());
3528  diagnoseDynamicExceptionSpecification(*this, SpecificationRange,
3529  Exceptions.empty());
3530  return Exceptions.empty() ? EST_DynamicNone : EST_Dynamic;
3531 }
3532 
3533 /// ParseTrailingReturnType - Parse a trailing return type on a new-style
3534 /// function declaration.
3535 TypeResult Parser::ParseTrailingReturnType(SourceRange &Range) {
3536  assert(Tok.is(tok::arrow) && "expected arrow");
3537 
3538  ConsumeToken();
3539 
3541 }
3542 
3543 /// \brief We have just started parsing the definition of a new class,
3544 /// so push that class onto our stack of classes that is currently
3545 /// being parsed.
3547 Parser::PushParsingClass(Decl *ClassDecl, bool NonNestedClass,
3548  bool IsInterface) {
3549  assert((NonNestedClass || !ClassStack.empty()) &&
3550  "Nested class without outer class");
3551  ClassStack.push(new ParsingClass(ClassDecl, NonNestedClass, IsInterface));
3552  return Actions.PushParsingClass();
3553 }
3554 
3555 /// \brief Deallocate the given parsed class and all of its nested
3556 /// classes.
3557 void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) {
3558  for (unsigned I = 0, N = Class->LateParsedDeclarations.size(); I != N; ++I)
3559  delete Class->LateParsedDeclarations[I];
3560  delete Class;
3561 }
3562 
3563 /// \brief Pop the top class of the stack of classes that are
3564 /// currently being parsed.
3565 ///
3566 /// This routine should be called when we have finished parsing the
3567 /// definition of a class, but have not yet popped the Scope
3568 /// associated with the class's definition.
3569 void Parser::PopParsingClass(Sema::ParsingClassState state) {
3570  assert(!ClassStack.empty() && "Mismatched push/pop for class parsing");
3571 
3572  Actions.PopParsingClass(state);
3573 
3574  ParsingClass *Victim = ClassStack.top();
3575  ClassStack.pop();
3576  if (Victim->TopLevelClass) {
3577  // Deallocate all of the nested classes of this class,
3578  // recursively: we don't need to keep any of this information.
3579  DeallocateParsedClasses(Victim);
3580  return;
3581  }
3582  assert(!ClassStack.empty() && "Missing top-level class?");
3583 
3584  if (Victim->LateParsedDeclarations.empty()) {
3585  // The victim is a nested class, but we will not need to perform
3586  // any processing after the definition of this class since it has
3587  // no members whose handling was delayed. Therefore, we can just
3588  // remove this nested class.
3589  DeallocateParsedClasses(Victim);
3590  return;
3591  }
3592 
3593  // This nested class has some members that will need to be processed
3594  // after the top-level class is completely defined. Therefore, add
3595  // it to the list of nested classes within its parent.
3596  assert(getCurScope()->isClassScope() && "Nested class outside of class scope?");
3597  ClassStack.top()->LateParsedDeclarations.push_back(new LateParsedClass(this, Victim));
3598  Victim->TemplateScope = getCurScope()->getParent()->isTemplateParamScope();
3599 }
3600 
3601 /// \brief Try to parse an 'identifier' which appears within an attribute-token.
3602 ///
3603 /// \return the parsed identifier on success, and 0 if the next token is not an
3604 /// attribute-token.
3605 ///
3606 /// C++11 [dcl.attr.grammar]p3:
3607 /// If a keyword or an alternative token that satisfies the syntactic
3608 /// requirements of an identifier is contained in an attribute-token,
3609 /// it is considered an identifier.
3610 IdentifierInfo *Parser::TryParseCXX11AttributeIdentifier(SourceLocation &Loc) {
3611  switch (Tok.getKind()) {
3612  default:
3613  // Identifiers and keywords have identifier info attached.
3614  if (!Tok.isAnnotation()) {
3615  if (IdentifierInfo *II = Tok.getIdentifierInfo()) {
3616  Loc = ConsumeToken();
3617  return II;
3618  }
3619  }
3620  return nullptr;
3621 
3622  case tok::ampamp: // 'and'
3623  case tok::pipe: // 'bitor'
3624  case tok::pipepipe: // 'or'
3625  case tok::caret: // 'xor'
3626  case tok::tilde: // 'compl'
3627  case tok::amp: // 'bitand'
3628  case tok::ampequal: // 'and_eq'
3629  case tok::pipeequal: // 'or_eq'
3630  case tok::caretequal: // 'xor_eq'
3631  case tok::exclaim: // 'not'
3632  case tok::exclaimequal: // 'not_eq'
3633  // Alternative tokens do not have identifier info, but their spelling
3634  // starts with an alphabetical character.
3635  SmallString<8> SpellingBuf;
3636  SourceLocation SpellingLoc =
3638  StringRef Spelling = PP.getSpelling(SpellingLoc, SpellingBuf);
3639  if (isLetter(Spelling[0])) {
3640  Loc = ConsumeToken();
3641  return &PP.getIdentifierTable().get(Spelling);
3642  }
3643  return nullptr;
3644  }
3645 }
3646 
3648  IdentifierInfo *ScopeName) {
3649  switch (AttributeList::getKind(AttrName, ScopeName,
3651  case AttributeList::AT_CarriesDependency:
3652  case AttributeList::AT_Deprecated:
3653  case AttributeList::AT_FallThrough:
3654  case AttributeList::AT_CXX11NoReturn:
3655  return true;
3656  case AttributeList::AT_WarnUnusedResult:
3657  return !ScopeName && AttrName->getName().equals("nodiscard");
3658  case AttributeList::AT_Unused:
3659  return !ScopeName && AttrName->getName().equals("maybe_unused");
3660  default:
3661  return false;
3662  }
3663 }
3664 
3665 /// ParseCXX11AttributeArgs -- Parse a C++11 attribute-argument-clause.
3666 ///
3667 /// [C++11] attribute-argument-clause:
3668 /// '(' balanced-token-seq ')'
3669 ///
3670 /// [C++11] balanced-token-seq:
3671 /// balanced-token
3672 /// balanced-token-seq balanced-token
3673 ///
3674 /// [C++11] balanced-token:
3675 /// '(' balanced-token-seq ')'
3676 /// '[' balanced-token-seq ']'
3677 /// '{' balanced-token-seq '}'
3678 /// any token but '(', ')', '[', ']', '{', or '}'
3679 bool Parser::ParseCXX11AttributeArgs(IdentifierInfo *AttrName,
3680  SourceLocation AttrNameLoc,
3681  ParsedAttributes &Attrs,
3682  SourceLocation *EndLoc,
3683  IdentifierInfo *ScopeName,
3684  SourceLocation ScopeLoc) {
3685  assert(Tok.is(tok::l_paren) && "Not a C++11 attribute argument list");
3686  SourceLocation LParenLoc = Tok.getLocation();
3687 
3688  // If the attribute isn't known, we will not attempt to parse any
3689  // arguments.
3690  if (!hasAttribute(AttrSyntax::CXX, ScopeName, AttrName,
3691  getTargetInfo(), getLangOpts())) {
3692  // Eat the left paren, then skip to the ending right paren.
3693  ConsumeParen();
3694  SkipUntil(tok::r_paren);
3695  return false;
3696  }
3697 
3698  if (ScopeName && ScopeName->getName() == "gnu")
3699  // GNU-scoped attributes have some special cases to handle GNU-specific
3700  // behaviors.
3701  ParseGNUAttributeArgs(AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
3702  ScopeLoc, AttributeList::AS_CXX11, nullptr);
3703  else {
3704  unsigned NumArgs =
3705  ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, EndLoc,
3706  ScopeName, ScopeLoc, AttributeList::AS_CXX11);
3707 
3708  const AttributeList *Attr = Attrs.getList();
3709  if (Attr && IsBuiltInOrStandardCXX11Attribute(AttrName, ScopeName)) {
3710  // If the attribute is a standard or built-in attribute and we are
3711  // parsing an argument list, we need to determine whether this attribute
3712  // was allowed to have an argument list (such as [[deprecated]]), and how
3713  // many arguments were parsed (so we can diagnose on [[deprecated()]]).
3714  if (Attr->getMaxArgs() && !NumArgs) {
3715  // The attribute was allowed to have arguments, but none were provided
3716  // even though the attribute parsed successfully. This is an error.
3717  Diag(LParenLoc, diag::err_attribute_requires_arguments) << AttrName;
3718  Attr->setInvalid(true);
3719  } else if (!Attr->getMaxArgs()) {
3720  // The attribute parsed successfully, but was not allowed to have any
3721  // arguments. It doesn't matter whether any were provided -- the
3722  // presence of the argument list (even if empty) is diagnosed.
3723  Diag(LParenLoc, diag::err_cxx11_attribute_forbids_arguments)
3724  << AttrName
3725  << FixItHint::CreateRemoval(SourceRange(LParenLoc, *EndLoc));
3726  Attr->setInvalid(true);
3727  }
3728  }
3729  }
3730  return true;
3731 }
3732 
3733 /// ParseCXX11AttributeSpecifier - Parse a C++11 attribute-specifier.
3734 ///
3735 /// [C++11] attribute-specifier:
3736 /// '[' '[' attribute-list ']' ']'
3737 /// alignment-specifier
3738 ///
3739 /// [C++11] attribute-list:
3740 /// attribute[opt]
3741 /// attribute-list ',' attribute[opt]
3742 /// attribute '...'
3743 /// attribute-list ',' attribute '...'
3744 ///
3745 /// [C++11] attribute:
3746 /// attribute-token attribute-argument-clause[opt]
3747 ///
3748 /// [C++11] attribute-token:
3749 /// identifier
3750 /// attribute-scoped-token
3751 ///
3752 /// [C++11] attribute-scoped-token:
3753 /// attribute-namespace '::' identifier
3754 ///
3755 /// [C++11] attribute-namespace:
3756 /// identifier
3757 void Parser::ParseCXX11AttributeSpecifier(ParsedAttributes &attrs,
3758  SourceLocation *endLoc) {
3759  if (Tok.is(tok::kw_alignas)) {
3760  Diag(Tok.getLocation(), diag::warn_cxx98_compat_alignas);
3761  ParseAlignmentSpecifier(attrs, endLoc);
3762  return;
3763  }
3764 
3765  assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square)
3766  && "Not a C++11 attribute list");
3767 
3768  Diag(Tok.getLocation(), diag::warn_cxx98_compat_attribute);
3769 
3770  ConsumeBracket();
3771  ConsumeBracket();
3772 
3773  SourceLocation CommonScopeLoc;
3774  IdentifierInfo *CommonScopeName = nullptr;
3775  if (Tok.is(tok::kw_using)) {
3776  Diag(Tok.getLocation(), getLangOpts().CPlusPlus1z
3777  ? diag::warn_cxx14_compat_using_attribute_ns
3778  : diag::ext_using_attribute_ns);
3779  ConsumeToken();
3780 
3781  CommonScopeName = TryParseCXX11AttributeIdentifier(CommonScopeLoc);
3782  if (!CommonScopeName) {
3783  Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
3784  SkipUntil(tok::r_square, tok::colon, StopBeforeMatch);
3785  }
3786  if (!TryConsumeToken(tok::colon) && CommonScopeName)
3787  Diag(Tok.getLocation(), diag::err_expected) << tok::colon;
3788  }
3789 
3790  llvm::SmallDenseMap<IdentifierInfo*, SourceLocation, 4> SeenAttrs;
3791 
3792  while (Tok.isNot(tok::r_square)) {
3793  // attribute not present
3794  if (TryConsumeToken(tok::comma))
3795  continue;
3796 
3797  SourceLocation ScopeLoc, AttrLoc;
3798  IdentifierInfo *ScopeName = nullptr, *AttrName = nullptr;
3799 
3800  AttrName = TryParseCXX11AttributeIdentifier(AttrLoc);
3801  if (!AttrName)
3802  // Break out to the "expected ']'" diagnostic.
3803  break;
3804 
3805  // scoped attribute
3806  if (TryConsumeToken(tok::coloncolon)) {
3807  ScopeName = AttrName;
3808  ScopeLoc = AttrLoc;
3809 
3810  AttrName = TryParseCXX11AttributeIdentifier(AttrLoc);
3811  if (!AttrName) {
3812  Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
3813  SkipUntil(tok::r_square, tok::comma, StopAtSemi | StopBeforeMatch);
3814  continue;
3815  }
3816  }
3817 
3818  if (CommonScopeName) {
3819  if (ScopeName) {
3820  Diag(ScopeLoc, diag::err_using_attribute_ns_conflict)
3821  << SourceRange(CommonScopeLoc);
3822  } else {
3823  ScopeName = CommonScopeName;
3824  ScopeLoc = CommonScopeLoc;
3825  }
3826  }
3827 
3828  bool StandardAttr = IsBuiltInOrStandardCXX11Attribute(AttrName, ScopeName);
3829  bool AttrParsed = false;
3830 
3831  if (StandardAttr &&
3832  !SeenAttrs.insert(std::make_pair(AttrName, AttrLoc)).second)
3833  Diag(AttrLoc, diag::err_cxx11_attribute_repeated)
3834  << AttrName << SourceRange(SeenAttrs[AttrName]);
3835 
3836  // Parse attribute arguments
3837  if (Tok.is(tok::l_paren))
3838  AttrParsed = ParseCXX11AttributeArgs(AttrName, AttrLoc, attrs, endLoc,
3839  ScopeName, ScopeLoc);
3840 
3841  if (!AttrParsed)
3842  attrs.addNew(AttrName,
3843  SourceRange(ScopeLoc.isValid() ? ScopeLoc : AttrLoc,
3844  AttrLoc),
3845  ScopeName, ScopeLoc, nullptr, 0, AttributeList::AS_CXX11);
3846 
3847  if (TryConsumeToken(tok::ellipsis))
3848  Diag(Tok, diag::err_cxx11_attribute_forbids_ellipsis)
3849  << AttrName->getName();
3850  }
3851 
3852  if (ExpectAndConsume(tok::r_square))
3853  SkipUntil(tok::r_square);
3854  if (endLoc)
3855  *endLoc = Tok.getLocation();
3856  if (ExpectAndConsume(tok::r_square))
3857  SkipUntil(tok::r_square);
3858 }
3859 
3860 /// ParseCXX11Attributes - Parse a C++11 attribute-specifier-seq.
3861 ///
3862 /// attribute-specifier-seq:
3863 /// attribute-specifier-seq[opt] attribute-specifier
3864 void Parser::ParseCXX11Attributes(ParsedAttributesWithRange &attrs,
3865  SourceLocation *endLoc) {
3866  assert(getLangOpts().CPlusPlus11);
3867 
3868  SourceLocation StartLoc = Tok.getLocation(), Loc;
3869  if (!endLoc)
3870  endLoc = &Loc;
3871 
3872  do {
3873  ParseCXX11AttributeSpecifier(attrs, endLoc);
3874  } while (isCXX11AttributeSpecifier());
3875 
3876  attrs.Range = SourceRange(StartLoc, *endLoc);
3877 }
3878 
3879 void Parser::DiagnoseAndSkipCXX11Attributes() {
3880  // Start and end location of an attribute or an attribute list.
3881  SourceLocation StartLoc = Tok.getLocation();
3882  SourceLocation EndLoc = SkipCXX11Attributes();
3883 
3884  if (EndLoc.isValid()) {
3885  SourceRange Range(StartLoc, EndLoc);
3886  Diag(StartLoc, diag::err_attributes_not_allowed)
3887  << Range;
3888  }
3889 }
3890 
3891 SourceLocation Parser::SkipCXX11Attributes() {
3892  SourceLocation EndLoc;
3893 
3894  if (!isCXX11AttributeSpecifier())
3895  return EndLoc;
3896 
3897  do {
3898  if (Tok.is(tok::l_square)) {
3899  BalancedDelimiterTracker T(*this, tok::l_square);
3900  T.consumeOpen();
3901  T.skipToEnd();
3902  EndLoc = T.getCloseLocation();
3903  } else {
3904  assert(Tok.is(tok::kw_alignas) && "not an attribute specifier");
3905  ConsumeToken();
3906  BalancedDelimiterTracker T(*this, tok::l_paren);
3907  if (!T.consumeOpen())
3908  T.skipToEnd();
3909  EndLoc = T.getCloseLocation();
3910  }
3911  } while (isCXX11AttributeSpecifier());
3912 
3913  return EndLoc;
3914 }
3915 
3916 /// ParseMicrosoftAttributes - Parse Microsoft attributes [Attr]
3917 ///
3918 /// [MS] ms-attribute:
3919 /// '[' token-seq ']'
3920 ///
3921 /// [MS] ms-attribute-seq:
3922 /// ms-attribute[opt]
3923 /// ms-attribute ms-attribute-seq
3924 void Parser::ParseMicrosoftAttributes(ParsedAttributes &attrs,
3925  SourceLocation *endLoc) {
3926  assert(Tok.is(tok::l_square) && "Not a Microsoft attribute list");
3927 
3928  do {
3929  // FIXME: If this is actually a C++11 attribute, parse it as one.
3930  BalancedDelimiterTracker T(*this, tok::l_square);
3931  T.consumeOpen();
3932  SkipUntil(tok::r_square, StopAtSemi | StopBeforeMatch);
3933  T.consumeClose();
3934  if (endLoc)
3935  *endLoc = T.getCloseLocation();
3936  } while (Tok.is(tok::l_square));
3937 }
3938 
3939 void Parser::ParseMicrosoftIfExistsClassDeclaration(DeclSpec::TST TagType,
3940  AccessSpecifier& CurAS) {
3941  IfExistsCondition Result;
3942  if (ParseMicrosoftIfExistsCondition(Result))
3943  return;
3944 
3945  BalancedDelimiterTracker Braces(*this, tok::l_brace);
3946  if (Braces.consumeOpen()) {
3947  Diag(Tok, diag::err_expected) << tok::l_brace;
3948  return;
3949  }
3950 
3951  switch (Result.Behavior) {
3952  case IEB_Parse:
3953  // Parse the declarations below.
3954  break;
3955 
3956  case IEB_Dependent:
3957  Diag(Result.KeywordLoc, diag::warn_microsoft_dependent_exists)
3958  << Result.IsIfExists;
3959  // Fall through to skip.
3960 
3961  case IEB_Skip:
3962  Braces.skipToEnd();
3963  return;
3964  }
3965 
3966  while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
3967  // __if_exists, __if_not_exists can nest.
3968  if (Tok.isOneOf(tok::kw___if_exists, tok::kw___if_not_exists)) {
3969  ParseMicrosoftIfExistsClassDeclaration((DeclSpec::TST)TagType, CurAS);
3970  continue;
3971  }
3972 
3973  // Check for extraneous top-level semicolon.
3974  if (Tok.is(tok::semi)) {
3975  ConsumeExtraSemi(InsideStruct, TagType);
3976  continue;
3977  }
3978 
3979  AccessSpecifier AS = getAccessSpecifierIfPresent();
3980  if (AS != AS_none) {
3981  // Current token is a C++ access specifier.
3982  CurAS = AS;
3983  SourceLocation ASLoc = Tok.getLocation();
3984  ConsumeToken();
3985  if (Tok.is(tok::colon))
3986  Actions.ActOnAccessSpecifier(AS, ASLoc, Tok.getLocation());
3987  else
3988  Diag(Tok, diag::err_expected) << tok::colon;
3989  ConsumeToken();
3990  continue;
3991  }
3992 
3993  // Parse all the comma separated declarators.
3994  ParseCXXClassMemberDeclaration(CurAS, nullptr);
3995  }
3996 
3997  Braces.consumeClose();
3998 }
MutableArrayRef< TemplateParameterList * > MultiTemplateParamsArg
Definition: Ownership.h:266
bool isAtStartOfLine() const
isAtStartOfLine - Return true if this token is at the start of a line.
Definition: Token.h:265
SourceManager & getSourceManager() const
Definition: Preprocessor.h:694
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:1047
IdKind getKind() const
Determine what kind of name we have.
Definition: DeclSpec.h:981
DeclaratorChunk::FunctionTypeInfo & getFunctionTypeInfo()
getFunctionTypeInfo - Retrieves the function type info object (looking through parentheses).
Definition: DeclSpec.h:2097
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:542
bool isInvalid() const
Definition: Ownership.h:160
void clear()
Reset the contents of this Declarator.
Definition: DeclSpec.h:1788
SourceLocation getConstSpecLoc() const
Definition: DeclSpec.h:541
SourceRange getSourceRange() const LLVM_READONLY
Return the source range that covers this unqualified-id.
Definition: DeclSpec.h:1087
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:958
IdentifierInfo * Name
FIXME: Temporarily stores the name of a specialization.
const LangOptions & getLangOpts() const
Definition: Parse/Parser.h:251
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:2056
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:1189
const Scope * getParent() const
getParent - Return the scope that this is nested in.
Definition: Scope.h:218
static CharSourceRange getTokenRange(SourceRange R)
The name refers to a dependent template name.
Definition: TemplateKinds.h:38
ActionResult< Expr * > ExprResult
Definition: Ownership.h:253
The current expression is potentially evaluated at run time, which means that code may be generated t...
Definition: Sema.h:819
bool hasPlaceholderType() const
Returns whether this expression has a placeholder type.
Definition: Expr.h:463
void CodeCompleteConstructorInitializer(Decl *Constructor, ArrayRef< CXXCtorInitializer * > Initializers)
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.
StringRef P
SCS getStorageClassSpec() const
Definition: DeclSpec.h:447
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:164
The base class of the type hierarchy.
Definition: Type.h:1281
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:46
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:447
static const char * getSpecifierName(Specifier VS)
Definition: DeclSpec.cpp:1277
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:93
TemplateNameKind Kind
The kind of template that Template refers to.
Wrapper for void* pointer.
Definition: Ownership.h:46
Parser - This implements a parser for the C family of languages.
Definition: Parse/Parser.h:57
void SetIdentifier(IdentifierInfo *Id, SourceLocation IdLoc)
Set the name of this declarator to be the given identifier.
Definition: DeclSpec.h:1981
unsigned getRawEncoding() const
When a SourceLocation itself cannot be used, this returns an (opaque) 32-bit integer encoding for it...
DeclGroupPtrTy BuildDeclaratorGroup(MutableArrayRef< Decl * > Group, bool TypeMayContainAuto=true)
BuildDeclaratorGroup - convert a list of declarations into a declaration group, performing any necess...
Definition: SemaDecl.cpp:10700
void ActOnFinishCXXNonNestedClass(Decl *D)
RAII object that enters a new expression evaluation context.
Definition: Sema.h:9606
void EnterToken(const Token &Tok)
Enters a token in the token stream to be lexed next.
static const TST TST_underlyingType
Definition: DeclSpec.h:298
Information about one declarator, including the parsed type information and the identifier.
Definition: DeclSpec.h:1624
void setTypeofParensRange(SourceRange range)
Definition: DeclSpec.h:518
TypeSpecifierType
Specifies the kind of type.
Definition: Specifiers.h:45
void ActOnTagFinishSkippedDefinition(SkippedDefinitionContext Context)
Definition: SemaDecl.cpp:1141
static const TST TST_interface
Definition: DeclSpec.h:291
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:38
friend class ObjCDeclContextSwitch
Definition: Parse/Parser.h:61
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:885
void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto)
Definition: SemaDecl.cpp:9988
Information about a template-id annotation token.
RecordDecl - Represents a struct/union/class.
Definition: Decl.h:3253
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:558
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:300
__ptr16, alignas(...), etc.
TemplateIdAnnotation * TemplateId
When Kind == IK_TemplateId or IK_ConstructorTemplateId, the template-id annotation that contains the ...
Definition: DeclSpec.h:952
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:162
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:4549
AttributeList * getList() const
Copy initialization.
Definition: Specifiers.h:226
void ActOnTagStartDefinition(Scope *S, Decl *TagDecl)
ActOnTagStartDefinition - Invoked when we have entered the scope of a tag's definition (e...
Definition: SemaDecl.cpp:13117
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:292
DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType=nullptr)
Definition: SemaDecl.cpp:54
static const TST TST_error
Definition: DeclSpec.h:306
Token - This structure provides full information about a lexed token.
Definition: Token.h:35
void setKind(tok::TokenKind K)
Definition: Token.h:90
SourceLocation getFirstLocation() const
Definition: DeclSpec.h:2303
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:461
i32 captured_struct **param SharedsTy A type which contains references the shared variables *param Shareds Context with the list of shared variables from the p *TaskFunction *param Data Additional data for task generation like final * state
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:12260
const TargetInfo & getTargetInfo() const
Definition: Parse/Parser.h:252
void setExternInLinkageSpec(bool Value)
Definition: DeclSpec.h:452
Represents a C++ unqualified-id that has been parsed.
Definition: DeclSpec.h:884
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
Microsoft throw(...) extension.
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:39
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:89
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:502
void setInvalid(bool b=true) const
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:3612
SourceLocation LAngleLoc
The location of the '<' before the template argument list.
bool isFunctionDeclarator(unsigned &idx) const
isFunctionDeclarator - This method returns true if the declarator is a function declarator (looking t...
Definition: DeclSpec.h:2066
A little helper class used to produce diagnostics.
Definition: Diagnostic.h:873
TemplateParameterList * ActOnTemplateParameterList(unsigned Depth, SourceLocation ExportLoc, SourceLocation TemplateLoc, SourceLocation LAngleLoc, ArrayRef< Decl * > Params, SourceLocation RAngleLoc, Expr *RequiresClause)
ActOnTemplateParameterList - Builds a TemplateParameterList, optionally constrained by RequiresClause...
TST getTypeSpecType() const
Definition: DeclSpec.h:479
void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, bool TypeMayContainAuto)
AddInitializerToDecl - Adds the initializer Init to the declaration dcl.
Definition: SemaDecl.cpp:9517
Kind getKind() const
SourceLocation getModulePrivateSpecLoc() const
Definition: DeclSpec.h:704
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:607
SourceLocation getFriendSpecLoc() const
Definition: DeclSpec.h:701
unsigned NumParams
NumParams - This is the number of formal parameters specified by the declarator.
Definition: DeclSpec.h:1247
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:44
unsigned getTypeQualifiers() const
getTypeQualifiers - Return a set of TQs.
Definition: DeclSpec.h:540
Decl * ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, Expr *AssertExpr, Expr *AssertMessageExpr, SourceLocation RParenLoc)
Expr - This represents one expression.
Definition: Expr.h:105
StringRef getName() const
Return the actual identifier string.
Decl * ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS, RecordDecl *&AnonRecord)
ParsedFreeStandingDeclSpec - This method is invoked when a declspec with no declarator (e...
Definition: SemaDecl.cpp:3714
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...
ParsedType getTypeName(const IdentifierInfo &II, SourceLocation NameLoc, Scope *S, CXXScopeSpec *SS=nullptr, bool isClassName=false, bool HasTrailingDot=false, ParsedType ObjectType=nullptr, 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:249
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:1648
TypeResult ActOnTypeName(Scope *S, Declarator &D)
Definition: SemaType.cpp:5212
void RevertCachedTokens(unsigned N)
When backtracking is enabled and tokens are cached, this allows to revert a specific number of tokens...
OpaquePtr< TemplateName > TemplateTy
Definition: Parse/Parser.h:268
Defines an enumeration for C++ overloaded operators.
void setAsmLabel(Expr *E)
Definition: DeclSpec.h:2209
SourceLocation getVolatileSpecLoc() const
Definition: DeclSpec.h:543
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:176
bool isPastIdentifier() const
isPastIdentifier - Return true if we have parsed beyond the point where the
Definition: DeclSpec.h:1963
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:123
CachedTokens * ExceptionSpecTokens
Pointer to the cached tokens for an exception-specification that has not yet been parsed...
Definition: DeclSpec.h:1300
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:95
InClassInitStyle
In-class initialization styles for non-static data members.
Definition: Specifiers.h:224
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:1394
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:4154
The result type of a method or function.
void CodeCompleteNamespaceDecl(Scope *S)
SourceLocation getAnnotationEndLoc() const
Definition: Token.h:137
ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, SourceLocation EllipsisLoc)
Invoked when parsing a template argument followed by an ellipsis, which creates a pack expansion...
const clang::PrintingPolicy & getPrintingPolicy() const
Definition: ASTContext.h:553
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:865
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:146
SmallVectorImpl< AnnotatedLine * >::const_iterator Next
bool ParseTopLevelDecl()
Definition: Parse/Parser.h:283
Encodes a location in the source.
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, SourceRange BraceRange)
ActOnTagFinishDefinition - Invoked once we have finished parsing the definition of a tag (enumeration...
Definition: SemaDecl.cpp:13178
Decl * ActOnFinishLinkageSpecification(Scope *S, Decl *LinkageSpec, SourceLocation RBraceLoc)
ActOnFinishLinkageSpecification - Complete the definition of the C++ linkage specification LinkageSpe...
const TemplateArgument * iterator
Definition: Type.h:4233
Specifier getLastSpecifier() const
Definition: DeclSpec.h:2305
Expr * getRepAsExpr() const
Definition: DeclSpec.h:495
void FinalizeDeclaration(Decl *D)
FinalizeDeclaration - called by ParseDeclarationAfterDeclarator to perform any semantic actions neces...
Definition: SemaDecl.cpp:10491
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:2727
bool isValid() const
ASTContext & getASTContext() const
Definition: Sema.h:1069
static const TST TST_union
Definition: DeclSpec.h:289
void setAnnotationEndLoc(SourceLocation L)
Definition: Token.h:141
IdentifierTable & getIdentifierTable()
Definition: Preprocessor.h:697
Scope * getCurScope() const
Definition: Parse/Parser.h:258
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:365
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:227
Represents a C++11 virt-specifier-seq.
Definition: DeclSpec.h:2276
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:1605
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:94
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.
unsigned TypeAlias
Whether this template specialization type is a substituted type alias.
Definition: Type.h:4171
void setFunctionDefinitionKind(FunctionDefinitionKind Val)
Definition: DeclSpec.h:2237
Decl * ActOnUsingDirective(Scope *CurScope, SourceLocation UsingLoc, SourceLocation NamespcLoc, CXXScopeSpec &SS, SourceLocation IdentLoc, IdentifierInfo *NamespcName, AttributeList *AttrList)
bool containsPlaceholderType() const
Definition: DeclSpec.h:520
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:64
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:297
bool isUnset() const
Definition: DeclSpec.h:2290
SmallVector< Token, 4 > CachedTokens
A set of tokens that has been cached for later parsing.
Definition: DeclSpec.h:1095
static const TST TST_decltype
Definition: DeclSpec.h:296
bool isFriendSpecified() const
Definition: DeclSpec.h:700
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 CodeCompleteTag(Scope *S, unsigned TagSpec)
bool hasTagDefinition() const
Definition: DeclSpec.cpp:354
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:1968
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:13141
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:96
bool SetSpecifier(Specifier VS, SourceLocation Loc, const char *&PrevSpec)
Definition: DeclSpec.cpp:1253
void ActOnTagDefinitionError(Scope *S, Decl *TagDecl)
ActOnTagDefinitionError - Invoked when there was an unrecoverable error parsing the definition of a t...
Definition: SemaDecl.cpp:13222
void takeAttributesFrom(ParsedAttributes &attrs)
Definition: DeclSpec.h:752
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:293
void SetRangeEnd(SourceLocation Loc)
SetRangeEnd - Set the end of the source range to Loc, unless it's invalid.
Definition: DeclSpec.h:1772
DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, ArrayRef< Decl * > Group)
Definition: SemaDecl.cpp:10669
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:255
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:907
SmallVector< TemplateParameterList *, 4 > TemplateParameterLists
Definition: Parse/Parser.h:270
CXXScopeSpec & getTypeSpecScope()
Definition: DeclSpec.h:499
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.
const Expr * Replacement
Definition: AttributeList.h:58
This is a scope that can contain a declaration.
Definition: Scope.h:58
bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, unsigned &DiagID, const PrintingPolicy &Policy)
Definition: DeclSpec.cpp:691
static ParsedType getTypeAnnotation(Token &Tok)
getTypeAnnotation - Read a parsed type out of an annotation token.
Definition: Parse/Parser.h:563
void getCXX11AttributeRanges(SmallVectorImpl< SourceRange > &Ranges)
Return a source range list of C++11 attributes associated with the declarator.
Definition: DeclSpec.h:2200
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:12171
ExprResult ParseConstantExpression(TypeCastState isTypeCast=NotTypeCast)
Definition: ParseExpr.cpp:197
Captures information about "declaration specifiers".
Definition: DeclSpec.h:228
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:1978
void setEnd(SourceLocation e)
SourceLocation ConsumeToken()
ConsumeToken - Consume the current 'peek token' and lex the next one.
Definition: Parse/Parser.h:292
void ActOnPureSpecifier(Decl *D, SourceLocation PureSpecLoc)
void PopParsingClass(ParsingClassState state)
Definition: Sema.h:3615
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:1779
ExprResult ExprError()
Definition: Ownership.h:268
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:55
bool isSet() const
Deprecated.
Definition: DeclSpec.h:209
unsigned getLength() const
Definition: Token.h:126
The current expression and its subexpressions occur within an unevaluated operand (C++11 [expr]p7)...
Definition: Sema.h:799
static const TST TST_struct
Definition: DeclSpec.h:290
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:1127
void setLocation(SourceLocation L)
Definition: Token.h:131
AttributeList * getNext() const
A trivial tuple used to represent a source range.
ExprResult CheckBooleanCondition(SourceLocation Loc, Expr *E, bool IsConstexpr=false)
CheckBooleanCondition - Diagnose problems involving the use of the given expression as a boolean cond...
Definition: SemaExpr.cpp:14371
NamedDecl - This represents a decl with a name.
Definition: Decl.h:213
void setIdentifier(const IdentifierInfo *Id, SourceLocation IdLoc)
Specify that this unqualified-id was parsed as an identifier.
Definition: DeclSpec.h:988
bool SetTypeSpecError()
Definition: DeclSpec.cpp:772
Represents C++ using-directive.
Definition: DeclCXX.h:2615
unsigned NumArgs
NumArgs - The number of template arguments.
void SetRangeEnd(SourceLocation Loc)
Definition: DeclSpec.h:608
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:117
void setCommaLoc(SourceLocation CL)
Definition: DeclSpec.h:2231
No in-class initializer.
Definition: Specifiers.h:225
ParamInfo * Params
Params - This is a pointer to a new[]'d array of ParamInfo objects that describe the parameters speci...
Definition: DeclSpec.h:1286
Attr - This represents one attribute.
Definition: Attr.h:45
void startToken()
Reset all flags to cleared.
Definition: Token.h:168
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:1729
AttributeList - Represents a syntactic attribute.
Definition: AttributeList.h:94
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:867
NamedDecl * ActOnFriendFunctionDecl(Scope *S, Declarator &D, MultiTemplateParamsArg TemplateParams)
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:176
const AttributeList * getAttributes() const
Definition: DeclSpec.h:2184