clang  3.9.0svn
ParseTemplate.cpp
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1 //===--- ParseTemplate.cpp - Template Parsing -----------------------------===//
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 parsing of C++ templates.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "clang/Parse/Parser.h"
15 #include "RAIIObjectsForParser.h"
16 #include "clang/AST/ASTConsumer.h"
17 #include "clang/AST/ASTContext.h"
18 #include "clang/AST/DeclTemplate.h"
20 #include "clang/Sema/DeclSpec.h"
22 #include "clang/Sema/Scope.h"
23 using namespace clang;
24 
25 /// \brief Parse a template declaration, explicit instantiation, or
26 /// explicit specialization.
27 Decl *
28 Parser::ParseDeclarationStartingWithTemplate(unsigned Context,
29  SourceLocation &DeclEnd,
30  AccessSpecifier AS,
31  AttributeList *AccessAttrs) {
32  ObjCDeclContextSwitch ObjCDC(*this);
33 
34  if (Tok.is(tok::kw_template) && NextToken().isNot(tok::less)) {
35  return ParseExplicitInstantiation(Context,
37  DeclEnd, AS);
38  }
39  return ParseTemplateDeclarationOrSpecialization(Context, DeclEnd, AS,
40  AccessAttrs);
41 }
42 
43 
44 
45 /// \brief Parse a template declaration or an explicit specialization.
46 ///
47 /// Template declarations include one or more template parameter lists
48 /// and either the function or class template declaration. Explicit
49 /// specializations contain one or more 'template < >' prefixes
50 /// followed by a (possibly templated) declaration. Since the
51 /// syntactic form of both features is nearly identical, we parse all
52 /// of the template headers together and let semantic analysis sort
53 /// the declarations from the explicit specializations.
54 ///
55 /// template-declaration: [C++ temp]
56 /// 'export'[opt] 'template' '<' template-parameter-list '>' declaration
57 ///
58 /// explicit-specialization: [ C++ temp.expl.spec]
59 /// 'template' '<' '>' declaration
60 Decl *
61 Parser::ParseTemplateDeclarationOrSpecialization(unsigned Context,
62  SourceLocation &DeclEnd,
63  AccessSpecifier AS,
64  AttributeList *AccessAttrs) {
65  assert(Tok.isOneOf(tok::kw_export, tok::kw_template) &&
66  "Token does not start a template declaration.");
67 
68  // Enter template-parameter scope.
69  ParseScope TemplateParmScope(this, Scope::TemplateParamScope);
70 
71  // Tell the action that names should be checked in the context of
72  // the declaration to come.
74  ParsingTemplateParams(*this, ParsingDeclRAIIObject::NoParent);
75 
76  // Parse multiple levels of template headers within this template
77  // parameter scope, e.g.,
78  //
79  // template<typename T>
80  // template<typename U>
81  // class A<T>::B { ... };
82  //
83  // We parse multiple levels non-recursively so that we can build a
84  // single data structure containing all of the template parameter
85  // lists to easily differentiate between the case above and:
86  //
87  // template<typename T>
88  // class A {
89  // template<typename U> class B;
90  // };
91  //
92  // In the first case, the action for declaring A<T>::B receives
93  // both template parameter lists. In the second case, the action for
94  // defining A<T>::B receives just the inner template parameter list
95  // (and retrieves the outer template parameter list from its
96  // context).
97  bool isSpecialization = true;
98  bool LastParamListWasEmpty = false;
99  TemplateParameterLists ParamLists;
100  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
101 
102  do {
103  // Consume the 'export', if any.
104  SourceLocation ExportLoc;
105  TryConsumeToken(tok::kw_export, ExportLoc);
106 
107  // Consume the 'template', which should be here.
108  SourceLocation TemplateLoc;
109  if (!TryConsumeToken(tok::kw_template, TemplateLoc)) {
110  Diag(Tok.getLocation(), diag::err_expected_template);
111  return nullptr;
112  }
113 
114  // Parse the '<' template-parameter-list '>'
115  SourceLocation LAngleLoc, RAngleLoc;
116  SmallVector<Decl*, 4> TemplateParams;
117  if (ParseTemplateParameters(CurTemplateDepthTracker.getDepth(),
118  TemplateParams, LAngleLoc, RAngleLoc)) {
119  // Skip until the semi-colon or a '}'.
120  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
121  TryConsumeToken(tok::semi);
122  return nullptr;
123  }
124 
125  ExprResult OptionalRequiresClauseConstraintER;
126  if (!TemplateParams.empty()) {
127  isSpecialization = false;
128  ++CurTemplateDepthTracker;
129 
130  if (TryConsumeToken(tok::kw_requires)) {
131  OptionalRequiresClauseConstraintER =
133  if (!OptionalRequiresClauseConstraintER.isUsable()) {
134  // Skip until the semi-colon or a '}'.
135  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
136  TryConsumeToken(tok::semi);
137  return nullptr;
138  }
139  }
140  } else {
141  LastParamListWasEmpty = true;
142  }
143 
144  ParamLists.push_back(Actions.ActOnTemplateParameterList(
145  CurTemplateDepthTracker.getDepth(), ExportLoc, TemplateLoc, LAngleLoc,
146  TemplateParams, RAngleLoc, OptionalRequiresClauseConstraintER.get()));
147  } while (Tok.isOneOf(tok::kw_export, tok::kw_template));
148 
149  unsigned NewFlags = getCurScope()->getFlags() & ~Scope::TemplateParamScope;
150  ParseScopeFlags TemplateScopeFlags(this, NewFlags, isSpecialization);
151 
152  // Parse the actual template declaration.
153  return ParseSingleDeclarationAfterTemplate(Context,
154  ParsedTemplateInfo(&ParamLists,
155  isSpecialization,
156  LastParamListWasEmpty),
157  ParsingTemplateParams,
158  DeclEnd, AS, AccessAttrs);
159 }
160 
161 /// \brief Parse a single declaration that declares a template,
162 /// template specialization, or explicit instantiation of a template.
163 ///
164 /// \param DeclEnd will receive the source location of the last token
165 /// within this declaration.
166 ///
167 /// \param AS the access specifier associated with this
168 /// declaration. Will be AS_none for namespace-scope declarations.
169 ///
170 /// \returns the new declaration.
171 Decl *
172 Parser::ParseSingleDeclarationAfterTemplate(
173  unsigned Context,
174  const ParsedTemplateInfo &TemplateInfo,
175  ParsingDeclRAIIObject &DiagsFromTParams,
176  SourceLocation &DeclEnd,
177  AccessSpecifier AS,
178  AttributeList *AccessAttrs) {
179  assert(TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
180  "Template information required");
181 
182  if (Tok.is(tok::kw_static_assert)) {
183  // A static_assert declaration may not be templated.
184  Diag(Tok.getLocation(), diag::err_templated_invalid_declaration)
185  << TemplateInfo.getSourceRange();
186  // Parse the static_assert declaration to improve error recovery.
187  return ParseStaticAssertDeclaration(DeclEnd);
188  }
189 
190  if (Context == Declarator::MemberContext) {
191  // We are parsing a member template.
192  ParseCXXClassMemberDeclaration(AS, AccessAttrs, TemplateInfo,
193  &DiagsFromTParams);
194  return nullptr;
195  }
196 
197  ParsedAttributesWithRange prefixAttrs(AttrFactory);
198  MaybeParseCXX11Attributes(prefixAttrs);
199 
200  if (Tok.is(tok::kw_using))
201  return ParseUsingDirectiveOrDeclaration(Context, TemplateInfo, DeclEnd,
202  prefixAttrs);
203 
204  // Parse the declaration specifiers, stealing any diagnostics from
205  // the template parameters.
206  ParsingDeclSpec DS(*this, &DiagsFromTParams);
207 
208  ParseDeclarationSpecifiers(DS, TemplateInfo, AS,
209  getDeclSpecContextFromDeclaratorContext(Context));
210 
211  if (Tok.is(tok::semi)) {
212  ProhibitAttributes(prefixAttrs);
213  DeclEnd = ConsumeToken();
214  RecordDecl *AnonRecord = nullptr;
216  getCurScope(), AS, DS,
217  TemplateInfo.TemplateParams ? *TemplateInfo.TemplateParams
219  TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation,
220  AnonRecord);
221  assert(!AnonRecord &&
222  "Anonymous unions/structs should not be valid with template");
223  DS.complete(Decl);
224  return Decl;
225  }
226 
227  // Move the attributes from the prefix into the DS.
228  if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation)
229  ProhibitAttributes(prefixAttrs);
230  else
231  DS.takeAttributesFrom(prefixAttrs);
232 
233  // Parse the declarator.
234  ParsingDeclarator DeclaratorInfo(*this, DS, (Declarator::TheContext)Context);
235  ParseDeclarator(DeclaratorInfo);
236  // Error parsing the declarator?
237  if (!DeclaratorInfo.hasName()) {
238  // If so, skip until the semi-colon or a }.
239  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
240  if (Tok.is(tok::semi))
241  ConsumeToken();
242  return nullptr;
243  }
244 
245  LateParsedAttrList LateParsedAttrs(true);
246  if (DeclaratorInfo.isFunctionDeclarator())
247  MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs);
248 
249  if (DeclaratorInfo.isFunctionDeclarator() &&
250  isStartOfFunctionDefinition(DeclaratorInfo)) {
251 
252  // Function definitions are only allowed at file scope and in C++ classes.
253  // The C++ inline method definition case is handled elsewhere, so we only
254  // need to handle the file scope definition case.
255  if (Context != Declarator::FileContext) {
256  Diag(Tok, diag::err_function_definition_not_allowed);
258  return nullptr;
259  }
260 
261  if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
262  // Recover by ignoring the 'typedef'. This was probably supposed to be
263  // the 'typename' keyword, which we should have already suggested adding
264  // if it's appropriate.
265  Diag(DS.getStorageClassSpecLoc(), diag::err_function_declared_typedef)
266  << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc());
267  DS.ClearStorageClassSpecs();
268  }
269 
270  if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
271  if (DeclaratorInfo.getName().getKind() != UnqualifiedId::IK_TemplateId) {
272  // If the declarator-id is not a template-id, issue a diagnostic and
273  // recover by ignoring the 'template' keyword.
274  Diag(Tok, diag::err_template_defn_explicit_instantiation) << 0;
275  return ParseFunctionDefinition(DeclaratorInfo, ParsedTemplateInfo(),
276  &LateParsedAttrs);
277  } else {
278  SourceLocation LAngleLoc
279  = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc);
280  Diag(DeclaratorInfo.getIdentifierLoc(),
281  diag::err_explicit_instantiation_with_definition)
282  << SourceRange(TemplateInfo.TemplateLoc)
283  << FixItHint::CreateInsertion(LAngleLoc, "<>");
284 
285  // Recover as if it were an explicit specialization.
286  TemplateParameterLists FakedParamLists;
287  FakedParamLists.push_back(Actions.ActOnTemplateParameterList(
288  0, SourceLocation(), TemplateInfo.TemplateLoc, LAngleLoc, None,
289  LAngleLoc, nullptr));
290 
291  return ParseFunctionDefinition(
292  DeclaratorInfo, ParsedTemplateInfo(&FakedParamLists,
293  /*isSpecialization=*/true,
294  /*LastParamListWasEmpty=*/true),
295  &LateParsedAttrs);
296  }
297  }
298  return ParseFunctionDefinition(DeclaratorInfo, TemplateInfo,
299  &LateParsedAttrs);
300  }
301 
302  // Parse this declaration.
303  Decl *ThisDecl = ParseDeclarationAfterDeclarator(DeclaratorInfo,
304  TemplateInfo);
305 
306  if (Tok.is(tok::comma)) {
307  Diag(Tok, diag::err_multiple_template_declarators)
308  << (int)TemplateInfo.Kind;
309  SkipUntil(tok::semi);
310  return ThisDecl;
311  }
312 
313  // Eat the semi colon after the declaration.
314  ExpectAndConsumeSemi(diag::err_expected_semi_declaration);
315  if (LateParsedAttrs.size() > 0)
316  ParseLexedAttributeList(LateParsedAttrs, ThisDecl, true, false);
317  DeclaratorInfo.complete(ThisDecl);
318  return ThisDecl;
319 }
320 
321 /// ParseTemplateParameters - Parses a template-parameter-list enclosed in
322 /// angle brackets. Depth is the depth of this template-parameter-list, which
323 /// is the number of template headers directly enclosing this template header.
324 /// TemplateParams is the current list of template parameters we're building.
325 /// The template parameter we parse will be added to this list. LAngleLoc and
326 /// RAngleLoc will receive the positions of the '<' and '>', respectively,
327 /// that enclose this template parameter list.
328 ///
329 /// \returns true if an error occurred, false otherwise.
330 bool Parser::ParseTemplateParameters(unsigned Depth,
331  SmallVectorImpl<Decl*> &TemplateParams,
332  SourceLocation &LAngleLoc,
333  SourceLocation &RAngleLoc) {
334  // Get the template parameter list.
335  if (!TryConsumeToken(tok::less, LAngleLoc)) {
336  Diag(Tok.getLocation(), diag::err_expected_less_after) << "template";
337  return true;
338  }
339 
340  // Try to parse the template parameter list.
341  bool Failed = false;
342  if (!Tok.is(tok::greater) && !Tok.is(tok::greatergreater))
343  Failed = ParseTemplateParameterList(Depth, TemplateParams);
344 
345  if (Tok.is(tok::greatergreater)) {
346  // No diagnostic required here: a template-parameter-list can only be
347  // followed by a declaration or, for a template template parameter, the
348  // 'class' keyword. Therefore, the second '>' will be diagnosed later.
349  // This matters for elegant diagnosis of:
350  // template<template<typename>> struct S;
351  Tok.setKind(tok::greater);
352  RAngleLoc = Tok.getLocation();
354  } else if (!TryConsumeToken(tok::greater, RAngleLoc) && Failed) {
355  Diag(Tok.getLocation(), diag::err_expected) << tok::greater;
356  return true;
357  }
358  return false;
359 }
360 
361 /// ParseTemplateParameterList - Parse a template parameter list. If
362 /// the parsing fails badly (i.e., closing bracket was left out), this
363 /// will try to put the token stream in a reasonable position (closing
364 /// a statement, etc.) and return false.
365 ///
366 /// template-parameter-list: [C++ temp]
367 /// template-parameter
368 /// template-parameter-list ',' template-parameter
369 bool
370 Parser::ParseTemplateParameterList(unsigned Depth,
371  SmallVectorImpl<Decl*> &TemplateParams) {
372  while (1) {
373  if (Decl *TmpParam
374  = ParseTemplateParameter(Depth, TemplateParams.size())) {
375  TemplateParams.push_back(TmpParam);
376  } else {
377  // If we failed to parse a template parameter, skip until we find
378  // a comma or closing brace.
379  SkipUntil(tok::comma, tok::greater, tok::greatergreater,
381  }
382 
383  // Did we find a comma or the end of the template parameter list?
384  if (Tok.is(tok::comma)) {
385  ConsumeToken();
386  } else if (Tok.isOneOf(tok::greater, tok::greatergreater)) {
387  // Don't consume this... that's done by template parser.
388  break;
389  } else {
390  // Somebody probably forgot to close the template. Skip ahead and
391  // try to get out of the expression. This error is currently
392  // subsumed by whatever goes on in ParseTemplateParameter.
393  Diag(Tok.getLocation(), diag::err_expected_comma_greater);
394  SkipUntil(tok::comma, tok::greater, tok::greatergreater,
396  return false;
397  }
398  }
399  return true;
400 }
401 
402 /// \brief Determine whether the parser is at the start of a template
403 /// type parameter.
404 bool Parser::isStartOfTemplateTypeParameter() {
405  if (Tok.is(tok::kw_class)) {
406  // "class" may be the start of an elaborated-type-specifier or a
407  // type-parameter. Per C++ [temp.param]p3, we prefer the type-parameter.
408  switch (NextToken().getKind()) {
409  case tok::equal:
410  case tok::comma:
411  case tok::greater:
412  case tok::greatergreater:
413  case tok::ellipsis:
414  return true;
415 
416  case tok::identifier:
417  // This may be either a type-parameter or an elaborated-type-specifier.
418  // We have to look further.
419  break;
420 
421  default:
422  return false;
423  }
424 
425  switch (GetLookAheadToken(2).getKind()) {
426  case tok::equal:
427  case tok::comma:
428  case tok::greater:
429  case tok::greatergreater:
430  return true;
431 
432  default:
433  return false;
434  }
435  }
436 
437  if (Tok.isNot(tok::kw_typename))
438  return false;
439 
440  // C++ [temp.param]p2:
441  // There is no semantic difference between class and typename in a
442  // template-parameter. typename followed by an unqualified-id
443  // names a template type parameter. typename followed by a
444  // qualified-id denotes the type in a non-type
445  // parameter-declaration.
446  Token Next = NextToken();
447 
448  // If we have an identifier, skip over it.
449  if (Next.getKind() == tok::identifier)
450  Next = GetLookAheadToken(2);
451 
452  switch (Next.getKind()) {
453  case tok::equal:
454  case tok::comma:
455  case tok::greater:
456  case tok::greatergreater:
457  case tok::ellipsis:
458  return true;
459 
460  default:
461  return false;
462  }
463 }
464 
465 /// ParseTemplateParameter - Parse a template-parameter (C++ [temp.param]).
466 ///
467 /// template-parameter: [C++ temp.param]
468 /// type-parameter
469 /// parameter-declaration
470 ///
471 /// type-parameter: (see below)
472 /// 'class' ...[opt] identifier[opt]
473 /// 'class' identifier[opt] '=' type-id
474 /// 'typename' ...[opt] identifier[opt]
475 /// 'typename' identifier[opt] '=' type-id
476 /// 'template' '<' template-parameter-list '>'
477 /// 'class' ...[opt] identifier[opt]
478 /// 'template' '<' template-parameter-list '>' 'class' identifier[opt]
479 /// = id-expression
480 Decl *Parser::ParseTemplateParameter(unsigned Depth, unsigned Position) {
481  if (isStartOfTemplateTypeParameter())
482  return ParseTypeParameter(Depth, Position);
483 
484  if (Tok.is(tok::kw_template))
485  return ParseTemplateTemplateParameter(Depth, Position);
486 
487  // If it's none of the above, then it must be a parameter declaration.
488  // NOTE: This will pick up errors in the closure of the template parameter
489  // list (e.g., template < ; Check here to implement >> style closures.
490  return ParseNonTypeTemplateParameter(Depth, Position);
491 }
492 
493 /// ParseTypeParameter - Parse a template type parameter (C++ [temp.param]).
494 /// Other kinds of template parameters are parsed in
495 /// ParseTemplateTemplateParameter and ParseNonTypeTemplateParameter.
496 ///
497 /// type-parameter: [C++ temp.param]
498 /// 'class' ...[opt][C++0x] identifier[opt]
499 /// 'class' identifier[opt] '=' type-id
500 /// 'typename' ...[opt][C++0x] identifier[opt]
501 /// 'typename' identifier[opt] '=' type-id
502 Decl *Parser::ParseTypeParameter(unsigned Depth, unsigned Position) {
503  assert(Tok.isOneOf(tok::kw_class, tok::kw_typename) &&
504  "A type-parameter starts with 'class' or 'typename'");
505 
506  // Consume the 'class' or 'typename' keyword.
507  bool TypenameKeyword = Tok.is(tok::kw_typename);
508  SourceLocation KeyLoc = ConsumeToken();
509 
510  // Grab the ellipsis (if given).
511  SourceLocation EllipsisLoc;
512  if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) {
513  Diag(EllipsisLoc,
515  ? diag::warn_cxx98_compat_variadic_templates
516  : diag::ext_variadic_templates);
517  }
518 
519  // Grab the template parameter name (if given)
520  SourceLocation NameLoc;
521  IdentifierInfo *ParamName = nullptr;
522  if (Tok.is(tok::identifier)) {
523  ParamName = Tok.getIdentifierInfo();
524  NameLoc = ConsumeToken();
525  } else if (Tok.isOneOf(tok::equal, tok::comma, tok::greater,
526  tok::greatergreater)) {
527  // Unnamed template parameter. Don't have to do anything here, just
528  // don't consume this token.
529  } else {
530  Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
531  return nullptr;
532  }
533 
534  // Recover from misplaced ellipsis.
535  bool AlreadyHasEllipsis = EllipsisLoc.isValid();
536  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
537  DiagnoseMisplacedEllipsis(EllipsisLoc, NameLoc, AlreadyHasEllipsis, true);
538 
539  // Grab a default argument (if available).
540  // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before
541  // we introduce the type parameter into the local scope.
542  SourceLocation EqualLoc;
543  ParsedType DefaultArg;
544  if (TryConsumeToken(tok::equal, EqualLoc))
545  DefaultArg = ParseTypeName(/*Range=*/nullptr,
547 
548  return Actions.ActOnTypeParameter(getCurScope(), TypenameKeyword, EllipsisLoc,
549  KeyLoc, ParamName, NameLoc, Depth, Position,
550  EqualLoc, DefaultArg);
551 }
552 
553 /// ParseTemplateTemplateParameter - Handle the parsing of template
554 /// template parameters.
555 ///
556 /// type-parameter: [C++ temp.param]
557 /// 'template' '<' template-parameter-list '>' type-parameter-key
558 /// ...[opt] identifier[opt]
559 /// 'template' '<' template-parameter-list '>' type-parameter-key
560 /// identifier[opt] = id-expression
561 /// type-parameter-key:
562 /// 'class'
563 /// 'typename' [C++1z]
564 Decl *
565 Parser::ParseTemplateTemplateParameter(unsigned Depth, unsigned Position) {
566  assert(Tok.is(tok::kw_template) && "Expected 'template' keyword");
567 
568  // Handle the template <...> part.
569  SourceLocation TemplateLoc = ConsumeToken();
570  SmallVector<Decl*,8> TemplateParams;
571  SourceLocation LAngleLoc, RAngleLoc;
572  {
573  ParseScope TemplateParmScope(this, Scope::TemplateParamScope);
574  if (ParseTemplateParameters(Depth + 1, TemplateParams, LAngleLoc,
575  RAngleLoc)) {
576  return nullptr;
577  }
578  }
579 
580  // Provide an ExtWarn if the C++1z feature of using 'typename' here is used.
581  // Generate a meaningful error if the user forgot to put class before the
582  // identifier, comma, or greater. Provide a fixit if the identifier, comma,
583  // or greater appear immediately or after 'struct'. In the latter case,
584  // replace the keyword with 'class'.
585  if (!TryConsumeToken(tok::kw_class)) {
586  bool Replace = Tok.isOneOf(tok::kw_typename, tok::kw_struct);
587  const Token &Next = Tok.is(tok::kw_struct) ? NextToken() : Tok;
588  if (Tok.is(tok::kw_typename)) {
589  Diag(Tok.getLocation(),
590  getLangOpts().CPlusPlus1z
591  ? diag::warn_cxx14_compat_template_template_param_typename
592  : diag::ext_template_template_param_typename)
593  << (!getLangOpts().CPlusPlus1z
594  ? FixItHint::CreateReplacement(Tok.getLocation(), "class")
595  : FixItHint());
596  } else if (Next.isOneOf(tok::identifier, tok::comma, tok::greater,
597  tok::greatergreater, tok::ellipsis)) {
598  Diag(Tok.getLocation(), diag::err_class_on_template_template_param)
599  << (Replace ? FixItHint::CreateReplacement(Tok.getLocation(), "class")
600  : FixItHint::CreateInsertion(Tok.getLocation(), "class "));
601  } else
602  Diag(Tok.getLocation(), diag::err_class_on_template_template_param);
603 
604  if (Replace)
605  ConsumeToken();
606  }
607 
608  // Parse the ellipsis, if given.
609  SourceLocation EllipsisLoc;
610  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
611  Diag(EllipsisLoc,
613  ? diag::warn_cxx98_compat_variadic_templates
614  : diag::ext_variadic_templates);
615 
616  // Get the identifier, if given.
617  SourceLocation NameLoc;
618  IdentifierInfo *ParamName = nullptr;
619  if (Tok.is(tok::identifier)) {
620  ParamName = Tok.getIdentifierInfo();
621  NameLoc = ConsumeToken();
622  } else if (Tok.isOneOf(tok::equal, tok::comma, tok::greater,
623  tok::greatergreater)) {
624  // Unnamed template parameter. Don't have to do anything here, just
625  // don't consume this token.
626  } else {
627  Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
628  return nullptr;
629  }
630 
631  // Recover from misplaced ellipsis.
632  bool AlreadyHasEllipsis = EllipsisLoc.isValid();
633  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
634  DiagnoseMisplacedEllipsis(EllipsisLoc, NameLoc, AlreadyHasEllipsis, true);
635 
636  TemplateParameterList *ParamList =
638  TemplateLoc, LAngleLoc,
639  TemplateParams,
640  RAngleLoc, nullptr);
641 
642  // Grab a default argument (if available).
643  // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before
644  // we introduce the template parameter into the local scope.
645  SourceLocation EqualLoc;
646  ParsedTemplateArgument DefaultArg;
647  if (TryConsumeToken(tok::equal, EqualLoc)) {
648  DefaultArg = ParseTemplateTemplateArgument();
649  if (DefaultArg.isInvalid()) {
650  Diag(Tok.getLocation(),
651  diag::err_default_template_template_parameter_not_template);
652  SkipUntil(tok::comma, tok::greater, tok::greatergreater,
654  }
655  }
656 
657  return Actions.ActOnTemplateTemplateParameter(getCurScope(), TemplateLoc,
658  ParamList, EllipsisLoc,
659  ParamName, NameLoc, Depth,
660  Position, EqualLoc, DefaultArg);
661 }
662 
663 /// ParseNonTypeTemplateParameter - Handle the parsing of non-type
664 /// template parameters (e.g., in "template<int Size> class array;").
665 ///
666 /// template-parameter:
667 /// ...
668 /// parameter-declaration
669 Decl *
670 Parser::ParseNonTypeTemplateParameter(unsigned Depth, unsigned Position) {
671  // Parse the declaration-specifiers (i.e., the type).
672  // FIXME: The type should probably be restricted in some way... Not all
673  // declarators (parts of declarators?) are accepted for parameters.
674  DeclSpec DS(AttrFactory);
675  ParseDeclarationSpecifiers(DS);
676 
677  // Parse this as a typename.
679  ParseDeclarator(ParamDecl);
680  if (DS.getTypeSpecType() == DeclSpec::TST_unspecified) {
681  Diag(Tok.getLocation(), diag::err_expected_template_parameter);
682  return nullptr;
683  }
684 
685  // Recover from misplaced ellipsis.
686  SourceLocation EllipsisLoc;
687  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
688  DiagnoseMisplacedEllipsisInDeclarator(EllipsisLoc, ParamDecl);
689 
690  // If there is a default value, parse it.
691  // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before
692  // we introduce the template parameter into the local scope.
693  SourceLocation EqualLoc;
694  ExprResult DefaultArg;
695  if (TryConsumeToken(tok::equal, EqualLoc)) {
696  // C++ [temp.param]p15:
697  // When parsing a default template-argument for a non-type
698  // template-parameter, the first non-nested > is taken as the
699  // end of the template-parameter-list rather than a greater-than
700  // operator.
701  GreaterThanIsOperatorScope G(GreaterThanIsOperator, false);
702  EnterExpressionEvaluationContext ConstantEvaluated(Actions,
704 
706  if (DefaultArg.isInvalid())
707  SkipUntil(tok::comma, tok::greater, StopAtSemi | StopBeforeMatch);
708  }
709 
710  // Create the parameter.
711  return Actions.ActOnNonTypeTemplateParameter(getCurScope(), ParamDecl,
712  Depth, Position, EqualLoc,
713  DefaultArg.get());
714 }
715 
716 void Parser::DiagnoseMisplacedEllipsis(SourceLocation EllipsisLoc,
717  SourceLocation CorrectLoc,
718  bool AlreadyHasEllipsis,
719  bool IdentifierHasName) {
720  FixItHint Insertion;
721  if (!AlreadyHasEllipsis)
722  Insertion = FixItHint::CreateInsertion(CorrectLoc, "...");
723  Diag(EllipsisLoc, diag::err_misplaced_ellipsis_in_declaration)
724  << FixItHint::CreateRemoval(EllipsisLoc) << Insertion
725  << !IdentifierHasName;
726 }
727 
728 void Parser::DiagnoseMisplacedEllipsisInDeclarator(SourceLocation EllipsisLoc,
729  Declarator &D) {
730  assert(EllipsisLoc.isValid());
731  bool AlreadyHasEllipsis = D.getEllipsisLoc().isValid();
732  if (!AlreadyHasEllipsis)
733  D.setEllipsisLoc(EllipsisLoc);
734  DiagnoseMisplacedEllipsis(EllipsisLoc, D.getIdentifierLoc(),
735  AlreadyHasEllipsis, D.hasName());
736 }
737 
738 /// \brief Parses a '>' at the end of a template list.
739 ///
740 /// If this function encounters '>>', '>>>', '>=', or '>>=', it tries
741 /// to determine if these tokens were supposed to be a '>' followed by
742 /// '>', '>>', '>=', or '>='. It emits an appropriate diagnostic if necessary.
743 ///
744 /// \param RAngleLoc the location of the consumed '>'.
745 ///
746 /// \param ConsumeLastToken if true, the '>' is consumed.
747 ///
748 /// \param ObjCGenericList if true, this is the '>' closing an Objective-C
749 /// type parameter or type argument list, rather than a C++ template parameter
750 /// or argument list.
751 ///
752 /// \returns true, if current token does not start with '>', false otherwise.
753 bool Parser::ParseGreaterThanInTemplateList(SourceLocation &RAngleLoc,
754  bool ConsumeLastToken,
755  bool ObjCGenericList) {
756  // What will be left once we've consumed the '>'.
757  tok::TokenKind RemainingToken;
758  const char *ReplacementStr = "> >";
759 
760  switch (Tok.getKind()) {
761  default:
762  Diag(Tok.getLocation(), diag::err_expected) << tok::greater;
763  return true;
764 
765  case tok::greater:
766  // Determine the location of the '>' token. Only consume this token
767  // if the caller asked us to.
768  RAngleLoc = Tok.getLocation();
769  if (ConsumeLastToken)
770  ConsumeToken();
771  return false;
772 
773  case tok::greatergreater:
774  RemainingToken = tok::greater;
775  break;
776 
777  case tok::greatergreatergreater:
778  RemainingToken = tok::greatergreater;
779  break;
780 
781  case tok::greaterequal:
782  RemainingToken = tok::equal;
783  ReplacementStr = "> =";
784  break;
785 
786  case tok::greatergreaterequal:
787  RemainingToken = tok::greaterequal;
788  break;
789  }
790 
791  // This template-id is terminated by a token which starts with a '>'. Outside
792  // C++11, this is now error recovery, and in C++11, this is error recovery if
793  // the token isn't '>>' or '>>>'.
794  // '>>>' is for CUDA, where this sequence of characters is parsed into
795  // tok::greatergreatergreater, rather than two separate tokens.
796  //
797  // We always allow this for Objective-C type parameter and type argument
798  // lists.
799  RAngleLoc = Tok.getLocation();
800  Token Next = NextToken();
801  if (!ObjCGenericList) {
802  // The source range of the '>>' or '>=' at the start of the token.
803  CharSourceRange ReplacementRange =
806  getLangOpts()));
807 
808  // A hint to put a space between the '>>'s. In order to make the hint as
809  // clear as possible, we include the characters either side of the space in
810  // the replacement, rather than just inserting a space at SecondCharLoc.
811  FixItHint Hint1 = FixItHint::CreateReplacement(ReplacementRange,
812  ReplacementStr);
813 
814  // A hint to put another space after the token, if it would otherwise be
815  // lexed differently.
816  FixItHint Hint2;
817  if ((RemainingToken == tok::greater ||
818  RemainingToken == tok::greatergreater) &&
819  (Next.isOneOf(tok::greater, tok::greatergreater,
820  tok::greatergreatergreater, tok::equal,
821  tok::greaterequal, tok::greatergreaterequal,
822  tok::equalequal)) &&
823  areTokensAdjacent(Tok, Next))
824  Hint2 = FixItHint::CreateInsertion(Next.getLocation(), " ");
825 
826  unsigned DiagId = diag::err_two_right_angle_brackets_need_space;
827  if (getLangOpts().CPlusPlus11 &&
828  (Tok.is(tok::greatergreater) || Tok.is(tok::greatergreatergreater)))
829  DiagId = diag::warn_cxx98_compat_two_right_angle_brackets;
830  else if (Tok.is(tok::greaterequal))
831  DiagId = diag::err_right_angle_bracket_equal_needs_space;
832  Diag(Tok.getLocation(), DiagId) << Hint1 << Hint2;
833  }
834 
835  // Strip the initial '>' from the token.
836  Token PrevTok = Tok;
837  if (RemainingToken == tok::equal && Next.is(tok::equal) &&
838  areTokensAdjacent(Tok, Next)) {
839  // Join two adjacent '=' tokens into one, for cases like:
840  // void (*p)() = f<int>;
841  // return f<int>==p;
842  ConsumeToken();
843  Tok.setKind(tok::equalequal);
844  Tok.setLength(Tok.getLength() + 1);
845  } else {
846  Tok.setKind(RemainingToken);
847  Tok.setLength(Tok.getLength() - 1);
848  }
850  PP.getSourceManager(),
851  getLangOpts()));
852 
853  // The advance from '>>' to '>' in a ObjectiveC template argument list needs
854  // to be properly reflected in the token cache to allow correct interaction
855  // between annotation and backtracking.
856  if (ObjCGenericList && PrevTok.getKind() == tok::greatergreater &&
857  RemainingToken == tok::greater && PP.IsPreviousCachedToken(PrevTok)) {
858  PrevTok.setKind(RemainingToken);
859  PrevTok.setLength(1);
860  // Break tok::greatergreater into two tok::greater but only add the second
861  // one in case the client asks to consume the last token.
862  if (ConsumeLastToken)
863  PP.ReplacePreviousCachedToken({PrevTok, Tok});
864  else
865  PP.ReplacePreviousCachedToken({PrevTok});
866  }
867 
868  if (!ConsumeLastToken) {
869  // Since we're not supposed to consume the '>' token, we need to push
870  // this token and revert the current token back to the '>'.
871  PP.EnterToken(Tok);
872  Tok.setKind(tok::greater);
873  Tok.setLength(1);
874  Tok.setLocation(RAngleLoc);
875  }
876  return false;
877 }
878 
879 
880 /// \brief Parses a template-id that after the template name has
881 /// already been parsed.
882 ///
883 /// This routine takes care of parsing the enclosed template argument
884 /// list ('<' template-parameter-list [opt] '>') and placing the
885 /// results into a form that can be transferred to semantic analysis.
886 ///
887 /// \param Template the template declaration produced by isTemplateName
888 ///
889 /// \param TemplateNameLoc the source location of the template name
890 ///
891 /// \param SS if non-NULL, the nested-name-specifier preceding the
892 /// template name.
893 ///
894 /// \param ConsumeLastToken if true, then we will consume the last
895 /// token that forms the template-id. Otherwise, we will leave the
896 /// last token in the stream (e.g., so that it can be replaced with an
897 /// annotation token).
898 bool
899 Parser::ParseTemplateIdAfterTemplateName(TemplateTy Template,
900  SourceLocation TemplateNameLoc,
901  const CXXScopeSpec &SS,
902  bool ConsumeLastToken,
903  SourceLocation &LAngleLoc,
904  TemplateArgList &TemplateArgs,
905  SourceLocation &RAngleLoc) {
906  assert(Tok.is(tok::less) && "Must have already parsed the template-name");
907 
908  // Consume the '<'.
909  LAngleLoc = ConsumeToken();
910 
911  // Parse the optional template-argument-list.
912  bool Invalid = false;
913  {
914  GreaterThanIsOperatorScope G(GreaterThanIsOperator, false);
915  if (Tok.isNot(tok::greater) && Tok.isNot(tok::greatergreater))
916  Invalid = ParseTemplateArgumentList(TemplateArgs);
917 
918  if (Invalid) {
919  // Try to find the closing '>'.
920  if (ConsumeLastToken)
921  SkipUntil(tok::greater, StopAtSemi);
922  else
923  SkipUntil(tok::greater, StopAtSemi | StopBeforeMatch);
924  return true;
925  }
926  }
927 
928  return ParseGreaterThanInTemplateList(RAngleLoc, ConsumeLastToken,
929  /*ObjCGenericList=*/false);
930 }
931 
932 /// \brief Replace the tokens that form a simple-template-id with an
933 /// annotation token containing the complete template-id.
934 ///
935 /// The first token in the stream must be the name of a template that
936 /// is followed by a '<'. This routine will parse the complete
937 /// simple-template-id and replace the tokens with a single annotation
938 /// token with one of two different kinds: if the template-id names a
939 /// type (and \p AllowTypeAnnotation is true), the annotation token is
940 /// a type annotation that includes the optional nested-name-specifier
941 /// (\p SS). Otherwise, the annotation token is a template-id
942 /// annotation that does not include the optional
943 /// nested-name-specifier.
944 ///
945 /// \param Template the declaration of the template named by the first
946 /// token (an identifier), as returned from \c Action::isTemplateName().
947 ///
948 /// \param TNK the kind of template that \p Template
949 /// refers to, as returned from \c Action::isTemplateName().
950 ///
951 /// \param SS if non-NULL, the nested-name-specifier that precedes
952 /// this template name.
953 ///
954 /// \param TemplateKWLoc if valid, specifies that this template-id
955 /// annotation was preceded by the 'template' keyword and gives the
956 /// location of that keyword. If invalid (the default), then this
957 /// template-id was not preceded by a 'template' keyword.
958 ///
959 /// \param AllowTypeAnnotation if true (the default), then a
960 /// simple-template-id that refers to a class template, template
961 /// template parameter, or other template that produces a type will be
962 /// replaced with a type annotation token. Otherwise, the
963 /// simple-template-id is always replaced with a template-id
964 /// annotation token.
965 ///
966 /// If an unrecoverable parse error occurs and no annotation token can be
967 /// formed, this function returns true.
968 ///
969 bool Parser::AnnotateTemplateIdToken(TemplateTy Template, TemplateNameKind TNK,
970  CXXScopeSpec &SS,
971  SourceLocation TemplateKWLoc,
973  bool AllowTypeAnnotation) {
974  assert(getLangOpts().CPlusPlus && "Can only annotate template-ids in C++");
975  assert(Template && Tok.is(tok::less) &&
976  "Parser isn't at the beginning of a template-id");
977 
978  // Consume the template-name.
979  SourceLocation TemplateNameLoc = TemplateName.getSourceRange().getBegin();
980 
981  // Parse the enclosed template argument list.
982  SourceLocation LAngleLoc, RAngleLoc;
983  TemplateArgList TemplateArgs;
984  bool Invalid = ParseTemplateIdAfterTemplateName(Template,
985  TemplateNameLoc,
986  SS, false, LAngleLoc,
987  TemplateArgs,
988  RAngleLoc);
989 
990  if (Invalid) {
991  // If we failed to parse the template ID but skipped ahead to a >, we're not
992  // going to be able to form a token annotation. Eat the '>' if present.
993  TryConsumeToken(tok::greater);
994  return true;
995  }
996 
997  ASTTemplateArgsPtr TemplateArgsPtr(TemplateArgs);
998 
999  // Build the annotation token.
1000  if (TNK == TNK_Type_template && AllowTypeAnnotation) {
1002  = Actions.ActOnTemplateIdType(SS, TemplateKWLoc,
1003  Template, TemplateNameLoc,
1004  LAngleLoc, TemplateArgsPtr, RAngleLoc);
1005  if (Type.isInvalid()) {
1006  // If we failed to parse the template ID but skipped ahead to a >, we're not
1007  // going to be able to form a token annotation. Eat the '>' if present.
1008  TryConsumeToken(tok::greater);
1009  return true;
1010  }
1011 
1012  Tok.setKind(tok::annot_typename);
1013  setTypeAnnotation(Tok, Type.get());
1014  if (SS.isNotEmpty())
1015  Tok.setLocation(SS.getBeginLoc());
1016  else if (TemplateKWLoc.isValid())
1017  Tok.setLocation(TemplateKWLoc);
1018  else
1019  Tok.setLocation(TemplateNameLoc);
1020  } else {
1021  // Build a template-id annotation token that can be processed
1022  // later.
1023  Tok.setKind(tok::annot_template_id);
1024  TemplateIdAnnotation *TemplateId
1025  = TemplateIdAnnotation::Allocate(TemplateArgs.size(), TemplateIds);
1026  TemplateId->TemplateNameLoc = TemplateNameLoc;
1027  if (TemplateName.getKind() == UnqualifiedId::IK_Identifier) {
1028  TemplateId->Name = TemplateName.Identifier;
1029  TemplateId->Operator = OO_None;
1030  } else {
1031  TemplateId->Name = nullptr;
1032  TemplateId->Operator = TemplateName.OperatorFunctionId.Operator;
1033  }
1034  TemplateId->SS = SS;
1035  TemplateId->TemplateKWLoc = TemplateKWLoc;
1036  TemplateId->Template = Template;
1037  TemplateId->Kind = TNK;
1038  TemplateId->LAngleLoc = LAngleLoc;
1039  TemplateId->RAngleLoc = RAngleLoc;
1040  ParsedTemplateArgument *Args = TemplateId->getTemplateArgs();
1041  for (unsigned Arg = 0, ArgEnd = TemplateArgs.size(); Arg != ArgEnd; ++Arg)
1042  Args[Arg] = ParsedTemplateArgument(TemplateArgs[Arg]);
1043  Tok.setAnnotationValue(TemplateId);
1044  if (TemplateKWLoc.isValid())
1045  Tok.setLocation(TemplateKWLoc);
1046  else
1047  Tok.setLocation(TemplateNameLoc);
1048  }
1049 
1050  // Common fields for the annotation token
1051  Tok.setAnnotationEndLoc(RAngleLoc);
1052 
1053  // In case the tokens were cached, have Preprocessor replace them with the
1054  // annotation token.
1055  PP.AnnotateCachedTokens(Tok);
1056  return false;
1057 }
1058 
1059 /// \brief Replaces a template-id annotation token with a type
1060 /// annotation token.
1061 ///
1062 /// If there was a failure when forming the type from the template-id,
1063 /// a type annotation token will still be created, but will have a
1064 /// NULL type pointer to signify an error.
1065 void Parser::AnnotateTemplateIdTokenAsType() {
1066  assert(Tok.is(tok::annot_template_id) && "Requires template-id tokens");
1067 
1068  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1069  assert((TemplateId->Kind == TNK_Type_template ||
1070  TemplateId->Kind == TNK_Dependent_template_name) &&
1071  "Only works for type and dependent templates");
1072 
1073  ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
1074  TemplateId->NumArgs);
1075 
1076  TypeResult Type
1077  = Actions.ActOnTemplateIdType(TemplateId->SS,
1078  TemplateId->TemplateKWLoc,
1079  TemplateId->Template,
1080  TemplateId->TemplateNameLoc,
1081  TemplateId->LAngleLoc,
1082  TemplateArgsPtr,
1083  TemplateId->RAngleLoc);
1084  // Create the new "type" annotation token.
1085  Tok.setKind(tok::annot_typename);
1086  setTypeAnnotation(Tok, Type.isInvalid() ? nullptr : Type.get());
1087  if (TemplateId->SS.isNotEmpty()) // it was a C++ qualified type name.
1088  Tok.setLocation(TemplateId->SS.getBeginLoc());
1089  // End location stays the same
1090 
1091  // Replace the template-id annotation token, and possible the scope-specifier
1092  // that precedes it, with the typename annotation token.
1093  PP.AnnotateCachedTokens(Tok);
1094 }
1095 
1096 /// \brief Determine whether the given token can end a template argument.
1097 static bool isEndOfTemplateArgument(Token Tok) {
1098  return Tok.isOneOf(tok::comma, tok::greater, tok::greatergreater);
1099 }
1100 
1101 /// \brief Parse a C++ template template argument.
1102 ParsedTemplateArgument Parser::ParseTemplateTemplateArgument() {
1103  if (!Tok.is(tok::identifier) && !Tok.is(tok::coloncolon) &&
1104  !Tok.is(tok::annot_cxxscope))
1105  return ParsedTemplateArgument();
1106 
1107  // C++0x [temp.arg.template]p1:
1108  // A template-argument for a template template-parameter shall be the name
1109  // of a class template or an alias template, expressed as id-expression.
1110  //
1111  // We parse an id-expression that refers to a class template or alias
1112  // template. The grammar we parse is:
1113  //
1114  // nested-name-specifier[opt] template[opt] identifier ...[opt]
1115  //
1116  // followed by a token that terminates a template argument, such as ',',
1117  // '>', or (in some cases) '>>'.
1118  CXXScopeSpec SS; // nested-name-specifier, if present
1119  ParseOptionalCXXScopeSpecifier(SS, nullptr,
1120  /*EnteringContext=*/false);
1121 
1123  SourceLocation EllipsisLoc;
1124  if (SS.isSet() && Tok.is(tok::kw_template)) {
1125  // Parse the optional 'template' keyword following the
1126  // nested-name-specifier.
1127  SourceLocation TemplateKWLoc = ConsumeToken();
1128 
1129  if (Tok.is(tok::identifier)) {
1130  // We appear to have a dependent template name.
1131  UnqualifiedId Name;
1132  Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1133  ConsumeToken(); // the identifier
1134 
1135  TryConsumeToken(tok::ellipsis, EllipsisLoc);
1136 
1137  // If the next token signals the end of a template argument,
1138  // then we have a dependent template name that could be a template
1139  // template argument.
1140  TemplateTy Template;
1141  if (isEndOfTemplateArgument(Tok) &&
1143  getCurScope(), SS, TemplateKWLoc, Name,
1144  /*ObjectType=*/nullptr,
1145  /*EnteringContext=*/false, Template))
1146  Result = ParsedTemplateArgument(SS, Template, Name.StartLocation);
1147  }
1148  } else if (Tok.is(tok::identifier)) {
1149  // We may have a (non-dependent) template name.
1150  TemplateTy Template;
1151  UnqualifiedId Name;
1152  Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1153  ConsumeToken(); // the identifier
1154 
1155  TryConsumeToken(tok::ellipsis, EllipsisLoc);
1156 
1157  if (isEndOfTemplateArgument(Tok)) {
1158  bool MemberOfUnknownSpecialization;
1159  TemplateNameKind TNK = Actions.isTemplateName(
1160  getCurScope(), SS,
1161  /*hasTemplateKeyword=*/false, Name,
1162  /*ObjectType=*/nullptr,
1163  /*EnteringContext=*/false, Template, MemberOfUnknownSpecialization);
1164  if (TNK == TNK_Dependent_template_name || TNK == TNK_Type_template) {
1165  // We have an id-expression that refers to a class template or
1166  // (C++0x) alias template.
1167  Result = ParsedTemplateArgument(SS, Template, Name.StartLocation);
1168  }
1169  }
1170  }
1171 
1172  // If this is a pack expansion, build it as such.
1173  if (EllipsisLoc.isValid() && !Result.isInvalid())
1174  Result = Actions.ActOnPackExpansion(Result, EllipsisLoc);
1175 
1176  return Result;
1177 }
1178 
1179 /// ParseTemplateArgument - Parse a C++ template argument (C++ [temp.names]).
1180 ///
1181 /// template-argument: [C++ 14.2]
1182 /// constant-expression
1183 /// type-id
1184 /// id-expression
1185 ParsedTemplateArgument Parser::ParseTemplateArgument() {
1186  // C++ [temp.arg]p2:
1187  // In a template-argument, an ambiguity between a type-id and an
1188  // expression is resolved to a type-id, regardless of the form of
1189  // the corresponding template-parameter.
1190  //
1191  // Therefore, we initially try to parse a type-id.
1192  if (isCXXTypeId(TypeIdAsTemplateArgument)) {
1193  SourceLocation Loc = Tok.getLocation();
1194  TypeResult TypeArg = ParseTypeName(/*Range=*/nullptr,
1196  if (TypeArg.isInvalid())
1197  return ParsedTemplateArgument();
1198 
1200  TypeArg.get().getAsOpaquePtr(),
1201  Loc);
1202  }
1203 
1204  // Try to parse a template template argument.
1205  {
1206  TentativeParsingAction TPA(*this);
1207 
1208  ParsedTemplateArgument TemplateTemplateArgument
1209  = ParseTemplateTemplateArgument();
1210  if (!TemplateTemplateArgument.isInvalid()) {
1211  TPA.Commit();
1212  return TemplateTemplateArgument;
1213  }
1214 
1215  // Revert this tentative parse to parse a non-type template argument.
1216  TPA.Revert();
1217  }
1218 
1219  // Parse a non-type template argument.
1220  SourceLocation Loc = Tok.getLocation();
1222  if (ExprArg.isInvalid() || !ExprArg.get())
1223  return ParsedTemplateArgument();
1224 
1226  ExprArg.get(), Loc);
1227 }
1228 
1229 /// \brief Determine whether the current tokens can only be parsed as a
1230 /// template argument list (starting with the '<') and never as a '<'
1231 /// expression.
1232 bool Parser::IsTemplateArgumentList(unsigned Skip) {
1233  struct AlwaysRevertAction : TentativeParsingAction {
1234  AlwaysRevertAction(Parser &P) : TentativeParsingAction(P) { }
1235  ~AlwaysRevertAction() { Revert(); }
1236  } Tentative(*this);
1237 
1238  while (Skip) {
1239  ConsumeToken();
1240  --Skip;
1241  }
1242 
1243  // '<'
1244  if (!TryConsumeToken(tok::less))
1245  return false;
1246 
1247  // An empty template argument list.
1248  if (Tok.is(tok::greater))
1249  return true;
1250 
1251  // See whether we have declaration specifiers, which indicate a type.
1252  while (isCXXDeclarationSpecifier() == TPResult::True)
1253  ConsumeToken();
1254 
1255  // If we have a '>' or a ',' then this is a template argument list.
1256  return Tok.isOneOf(tok::greater, tok::comma);
1257 }
1258 
1259 /// ParseTemplateArgumentList - Parse a C++ template-argument-list
1260 /// (C++ [temp.names]). Returns true if there was an error.
1261 ///
1262 /// template-argument-list: [C++ 14.2]
1263 /// template-argument
1264 /// template-argument-list ',' template-argument
1265 bool
1266 Parser::ParseTemplateArgumentList(TemplateArgList &TemplateArgs) {
1267  // Template argument lists are constant-evaluation contexts.
1269  ColonProtectionRAIIObject ColonProtection(*this, false);
1270 
1271  do {
1272  ParsedTemplateArgument Arg = ParseTemplateArgument();
1273  SourceLocation EllipsisLoc;
1274  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
1275  Arg = Actions.ActOnPackExpansion(Arg, EllipsisLoc);
1276 
1277  if (Arg.isInvalid()) {
1278  SkipUntil(tok::comma, tok::greater, StopAtSemi | StopBeforeMatch);
1279  return true;
1280  }
1281 
1282  // Save this template argument.
1283  TemplateArgs.push_back(Arg);
1284 
1285  // If the next token is a comma, consume it and keep reading
1286  // arguments.
1287  } while (TryConsumeToken(tok::comma));
1288 
1289  return false;
1290 }
1291 
1292 /// \brief Parse a C++ explicit template instantiation
1293 /// (C++ [temp.explicit]).
1294 ///
1295 /// explicit-instantiation:
1296 /// 'extern' [opt] 'template' declaration
1297 ///
1298 /// Note that the 'extern' is a GNU extension and C++11 feature.
1299 Decl *Parser::ParseExplicitInstantiation(unsigned Context,
1300  SourceLocation ExternLoc,
1301  SourceLocation TemplateLoc,
1302  SourceLocation &DeclEnd,
1303  AccessSpecifier AS) {
1304  // This isn't really required here.
1306  ParsingTemplateParams(*this, ParsingDeclRAIIObject::NoParent);
1307 
1308  return ParseSingleDeclarationAfterTemplate(Context,
1309  ParsedTemplateInfo(ExternLoc,
1310  TemplateLoc),
1311  ParsingTemplateParams,
1312  DeclEnd, AS);
1313 }
1314 
1315 SourceRange Parser::ParsedTemplateInfo::getSourceRange() const {
1316  if (TemplateParams)
1317  return getTemplateParamsRange(TemplateParams->data(),
1318  TemplateParams->size());
1319 
1320  SourceRange R(TemplateLoc);
1321  if (ExternLoc.isValid())
1322  R.setBegin(ExternLoc);
1323  return R;
1324 }
1325 
1326 void Parser::LateTemplateParserCallback(void *P, LateParsedTemplate &LPT) {
1327  ((Parser *)P)->ParseLateTemplatedFuncDef(LPT);
1328 }
1329 
1330 /// \brief Late parse a C++ function template in Microsoft mode.
1331 void Parser::ParseLateTemplatedFuncDef(LateParsedTemplate &LPT) {
1332  if (!LPT.D)
1333  return;
1334 
1335  // Get the FunctionDecl.
1336  FunctionDecl *FunD = LPT.D->getAsFunction();
1337  // Track template parameter depth.
1338  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
1339 
1340  // To restore the context after late parsing.
1341  Sema::ContextRAII GlobalSavedContext(
1342  Actions, Actions.Context.getTranslationUnitDecl());
1343 
1344  SmallVector<ParseScope*, 4> TemplateParamScopeStack;
1345 
1346  // Get the list of DeclContexts to reenter.
1347  SmallVector<DeclContext*, 4> DeclContextsToReenter;
1348  DeclContext *DD = FunD;
1349  while (DD && !DD->isTranslationUnit()) {
1350  DeclContextsToReenter.push_back(DD);
1351  DD = DD->getLexicalParent();
1352  }
1353 
1354  // Reenter template scopes from outermost to innermost.
1356  DeclContextsToReenter.rbegin();
1357  for (; II != DeclContextsToReenter.rend(); ++II) {
1358  TemplateParamScopeStack.push_back(new ParseScope(this,
1360  unsigned NumParamLists =
1361  Actions.ActOnReenterTemplateScope(getCurScope(), cast<Decl>(*II));
1362  CurTemplateDepthTracker.addDepth(NumParamLists);
1363  if (*II != FunD) {
1364  TemplateParamScopeStack.push_back(new ParseScope(this, Scope::DeclScope));
1365  Actions.PushDeclContext(Actions.getCurScope(), *II);
1366  }
1367  }
1368 
1369  assert(!LPT.Toks.empty() && "Empty body!");
1370 
1371  // Append the current token at the end of the new token stream so that it
1372  // doesn't get lost.
1373  LPT.Toks.push_back(Tok);
1374  PP.EnterTokenStream(LPT.Toks, true);
1375 
1376  // Consume the previously pushed token.
1377  ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
1378  assert(Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try) &&
1379  "Inline method not starting with '{', ':' or 'try'");
1380 
1381  // Parse the method body. Function body parsing code is similar enough
1382  // to be re-used for method bodies as well.
1383  ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope);
1384 
1385  // Recreate the containing function DeclContext.
1386  Sema::ContextRAII FunctionSavedContext(Actions,
1387  Actions.getContainingDC(FunD));
1388 
1389  Actions.ActOnStartOfFunctionDef(getCurScope(), FunD);
1390 
1391  if (Tok.is(tok::kw_try)) {
1392  ParseFunctionTryBlock(LPT.D, FnScope);
1393  } else {
1394  if (Tok.is(tok::colon))
1395  ParseConstructorInitializer(LPT.D);
1396  else
1397  Actions.ActOnDefaultCtorInitializers(LPT.D);
1398 
1399  if (Tok.is(tok::l_brace)) {
1400  assert((!isa<FunctionTemplateDecl>(LPT.D) ||
1401  cast<FunctionTemplateDecl>(LPT.D)
1402  ->getTemplateParameters()
1403  ->getDepth() == TemplateParameterDepth - 1) &&
1404  "TemplateParameterDepth should be greater than the depth of "
1405  "current template being instantiated!");
1406  ParseFunctionStatementBody(LPT.D, FnScope);
1407  Actions.UnmarkAsLateParsedTemplate(FunD);
1408  } else
1409  Actions.ActOnFinishFunctionBody(LPT.D, nullptr);
1410  }
1411 
1412  // Exit scopes.
1413  FnScope.Exit();
1415  TemplateParamScopeStack.rbegin();
1416  for (; I != TemplateParamScopeStack.rend(); ++I)
1417  delete *I;
1418 }
1419 
1420 /// \brief Lex a delayed template function for late parsing.
1421 void Parser::LexTemplateFunctionForLateParsing(CachedTokens &Toks) {
1422  tok::TokenKind kind = Tok.getKind();
1423  if (!ConsumeAndStoreFunctionPrologue(Toks)) {
1424  // Consume everything up to (and including) the matching right brace.
1425  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
1426  }
1427 
1428  // If we're in a function-try-block, we need to store all the catch blocks.
1429  if (kind == tok::kw_try) {
1430  while (Tok.is(tok::kw_catch)) {
1431  ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false);
1432  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
1433  }
1434  }
1435 }
unsigned getFlags() const
getFlags - Return the flags for this scope.
Definition: Scope.h:210
SourceManager & getSourceManager() const
Definition: Preprocessor.h:694
Defines the clang::ASTContext interface.
void ReplacePreviousCachedToken(ArrayRef< Token > NewToks)
Replace token in CachedLexPos - 1 in CachedTokens by the tokens in NewToks.
Definition: PPCaching.cpp:138
IdKind getKind() const
Determine what kind of name we have.
Definition: DeclSpec.h:975
FunctionDecl - An instance of this class is created to represent a function declaration or definition...
Definition: Decl.h:1539
bool isInvalid() const
Definition: Ownership.h:160
SourceRange getSourceRange() const LLVM_READONLY
Return the source range that covers this unqualified-id.
Definition: DeclSpec.h:1081
SourceLocation StartLocation
The location of the first token that describes this unqualified-id, which will be the location of the...
Definition: DeclSpec.h:952
IdentifierInfo * Name
FIXME: Temporarily stores the name of a specialization.
const LangOptions & getLangOpts() const
Definition: Parse/Parser.h:250
SourceLocation TemplateNameLoc
TemplateNameLoc - The location of the template name within the source.
IdentifierInfo * Identifier
When Kind == IK_Identifier, the parsed identifier, or when Kind == IK_UserLiteralId, the identifier suffix.
Definition: DeclSpec.h:925
The name refers to a dependent template name.
Definition: TemplateKinds.h:38
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:78
RAII object used to inform the actions that we&#39;re currently parsing a declaration.
Defines the C++ template declaration subclasses.
StringRef P
PtrTy get() const
Definition: Ownership.h:164
The base class of the type hierarchy.
Definition: Type.h:1255
This indicates that the scope corresponds to a function, which means that labels are set here...
Definition: Scope.h:46
AccessSpecifier
A C++ access specifier (public, private, protected), plus the special value "none" which means differ...
Definition: Specifiers.h:92
TemplateNameKind Kind
The kind of template that Template refers to.
Parser - This implements a parser for the C family of languages.
Definition: Parse/Parser.h:56
RAII object that enters a new expression evaluation context.
Definition: Sema.h:9430
void EnterToken(const Token &Tok)
Enters a token in the token stream to be lexed next.
Information about one declarator, including the parsed type information and the identifier.
Definition: DeclSpec.h:1612
Stores a list of template parameters for a TemplateDecl and its derived classes.
Definition: DeclTemplate.h:48
friend class ObjCDeclContextSwitch
Definition: Parse/Parser.h:60
ColonProtectionRAIIObject - This sets the Parser::ColonIsSacred bool and restores it when destroyed...
bool SkipUntil(tok::TokenKind T, SkipUntilFlags Flags=static_cast< SkipUntilFlags >(0))
SkipUntil - Read tokens until we get to the specified token, then consume it (unless StopBeforeMatch ...
Definition: Parse/Parser.h:872
Information about a template-id annotation token.
RecordDecl - Represents a struct/union/class.
Definition: Decl.h:3228
const Token & NextToken()
NextToken - This peeks ahead one token and returns it without consuming it.
Definition: Parse/Parser.h:557
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:299
One of these records is kept for each identifier that is lexed.
Decl * ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, unsigned Depth, unsigned Position, SourceLocation EqualLoc, Expr *DefaultArg)
OverloadedOperatorKind Operator
The kind of overloaded operator.
Definition: DeclSpec.h:908
TypeResult ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, TemplateTy Template, SourceLocation TemplateLoc, SourceLocation LAngleLoc, ASTTemplateArgsPtr TemplateArgs, SourceLocation RAngleLoc, bool IsCtorOrDtorName=false)
struct OFI OperatorFunctionId
When Kind == IK_OperatorFunctionId, the overloaded operator that we parsed.
Definition: DeclSpec.h:929
bool isTranslationUnit() const
Definition: DeclBase.h:1286
CachedTokens Toks
Definition: Sema.h:9464
Token - This structure provides full information about a lexed token.
Definition: Token.h:37
A non-type template parameter, stored as an expression.
void setKind(tok::TokenKind K)
Definition: Token.h:92
Represents a C++ unqualified-id that has been parsed.
Definition: DeclSpec.h:878
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
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
Represents a C++ nested-name-specifier or a global scope specifier.
Definition: DeclSpec.h:63
tok::TokenKind getKind() const
Definition: Token.h:91
static SourceLocation AdvanceToTokenCharacter(SourceLocation TokStart, unsigned Character, const SourceManager &SM, const LangOptions &LangOpts)
AdvanceToTokenCharacter - If the current SourceLocation specifies a location at the start of a token...
Definition: Lexer.cpp:700
Decl * ActOnTypeParameter(Scope *S, bool Typename, SourceLocation EllipsisLoc, SourceLocation KeyLoc, IdentifierInfo *ParamName, SourceLocation ParamNameLoc, unsigned Depth, unsigned Position, SourceLocation EqualLoc, ParsedType DefaultArg)
ActOnTypeParameter - Called when a C++ template type parameter (e.g., "typename T") has been parsed...
SourceLocation TemplateKWLoc
TemplateKWLoc - The location of the template keyword within the source.
SourceLocation LAngleLoc
The location of the &#39;<&#39; before the template argument list.
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...
A class for parsing a declarator.
TypeResult ParseTypeName(SourceRange *Range=nullptr, Declarator::TheContext Context=Declarator::TypeNameContext, AccessSpecifier AS=AS_none, Decl **OwnedType=nullptr, ParsedAttributes *Attrs=nullptr)
ParseTypeName type-name: [C99 6.7.6] specifier-qualifier-list abstract-declarator[opt].
Definition: ParseDecl.cpp:43
DeclContext * getLexicalParent()
getLexicalParent - Returns the containing lexical DeclContext.
Definition: DeclBase.h:1233
void setAnnotationValue(void *val)
Definition: Token.h:229
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:3644
Represents a character-granular source range.
void AnnotateCachedTokens(const Token &Tok)
We notify the Preprocessor that if it is caching tokens (because backtrack is enabled) it should repl...
This file defines the classes used to store parsed information about declaration-specifiers and decla...
void SkipMalformedDecl()
SkipMalformedDecl - Read tokens until we get to some likely good stopping point for skipping past a s...
Definition: ParseDecl.cpp:1641
OpaquePtr< TemplateName > TemplateTy
Definition: Parse/Parser.h:267
static bool isEndOfTemplateArgument(Token Tok)
Determine whether the given token can end a template argument.
Represents a C++ template name within the type system.
Definition: TemplateName.h:176
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:125
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:97
void setEllipsisLoc(SourceLocation EL)
Definition: DeclSpec.h:2217
TemplateNameKind isTemplateName(Scope *S, CXXScopeSpec &SS, bool hasTemplateKeyword, UnqualifiedId &Name, ParsedType ObjectType, bool EnteringContext, TemplateTy &Template, bool &MemberOfUnknownSpecialization)
The result type of a method or function.
ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, SourceLocation EllipsisLoc)
Invoked when parsing a template argument followed by an ellipsis, which creates a pack expansion...
RAII object that makes &#39;>&#39; behave either as an operator or as the closing angle bracket for a templat...
static CharSourceRange getCharRange(SourceRange R)
A class for parsing a DeclSpec.
Stop skipping at semicolon.
Definition: Parse/Parser.h:852
Represents the parsed form of a C++ template argument.
FunctionDecl * getAsFunction() LLVM_READONLY
Returns the function itself, or the templated function if this is a function template.
Definition: DeclBase.cpp:187
Encodes a location in the source.
void setLength(unsigned Len)
Definition: Token.h:134
bool isValid() const
Return true if this is a valid SourceLocation object.
void setAnnotationEndLoc(SourceLocation L)
Definition: Token.h:143
Scope * getCurScope() const
Definition: Parse/Parser.h:257
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:25
SourceLocation getBegin() const
SourceLocation getBeginLoc() const
Definition: DeclSpec.h:72
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:96
A template type parameter, stored as a type.
Decl * ActOnTemplateTemplateParameter(Scope *S, SourceLocation TmpLoc, TemplateParameterList *Params, SourceLocation EllipsisLoc, IdentifierInfo *ParamName, SourceLocation ParamNameLoc, unsigned Depth, unsigned Position, SourceLocation EqualLoc, ParsedTemplateArgument DefaultArg)
ActOnTemplateTemplateParameter - Called when a C++ template template parameter (e.g.
Dataflow Directional Tag Classes.
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1138
CXXScopeSpec SS
The nested-name-specifier that precedes the template name.
SourceLocation RAngleLoc
The location of the &#39;>&#39; after the template argument list.
static FixItHint CreateRemoval(CharSourceRange RemoveRange)
Create a code modification hint that removes the given source range.
Definition: Diagnostic.h:104
This is a scope that corresponds to the template parameters of a C++ template.
Definition: Scope.h:76
ExprResult ParseConstraintExpression()
Parse a constraint-expression.
Definition: ParseExpr.cpp:216
bool hasName() const
hasName - Whether this declarator has a name, which might be an identifier (accessible via getIdentif...
Definition: DeclSpec.h:1951
The name refers to a template whose specialization produces a type.
Definition: TemplateKinds.h:30
static const TST TST_unspecified
Definition: DeclSpec.h:272
Not an overloaded operator.
Definition: OperatorKinds.h:23
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:98
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
OverloadedOperatorKind Operator
FIXME: Temporarily stores the overloaded operator kind.
bool isInvalid() const
Determine whether the given template argument is invalid.
SourceRange getTemplateParamsRange(TemplateParameterList const *const *Params, unsigned NumParams)
Retrieves the range of the given template parameter lists.
ExprResult ParseAssignmentExpression(TypeCastState isTypeCast=NotTypeCast)
Parse an expr that doesn&#39;t include (top-level) commas.
Definition: ParseExpr.cpp:157
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:901
SmallVector< TemplateParameterList *, 4 > TemplateParameterLists
Definition: Parse/Parser.h:269
bool isUsable() const
Definition: Ownership.h:161
This is a scope that can contain a declaration.
Definition: Scope.h:58
bool IsPreviousCachedToken(const Token &Tok) const
Whether Tok is the most recent token (CachedLexPos - 1) in CachedTokens.
Definition: PPCaching.cpp:120
ExprResult ParseConstantExpression(TypeCastState isTypeCast=NotTypeCast)
Definition: ParseExpr.cpp:197
TemplateNameKind ActOnDependentTemplateName(Scope *S, CXXScopeSpec &SS, SourceLocation TemplateKWLoc, UnqualifiedId &Name, ParsedType ObjectType, bool EnteringContext, TemplateTy &Template)
Form a dependent template name.
Captures information about "declaration specifiers".
Definition: DeclSpec.h:228
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:1961
SourceLocation ConsumeToken()
ConsumeToken - Consume the current &#39;peek token&#39; and lex the next one.
Definition: Parse/Parser.h:291
static TemplateIdAnnotation * Allocate(unsigned NumArgs, SmallVectorImpl< TemplateIdAnnotation * > &List)
Creates a new TemplateIdAnnotation with NumArgs arguments and appends it to List. ...
Decl * D
The template function declaration to be late parsed.
Definition: Sema.h:9466
The current context is "potentially evaluated" in C++11 terms, but the expression is evaluated at com...
Definition: Sema.h:809
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...
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:43
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
bool isSet() const
Deprecated.
Definition: DeclSpec.h:209
unsigned getLength() const
Definition: Token.h:128
Contains a late templated function.
Definition: Sema.h:9463
Annotates a diagnostic with some code that should be inserted, removed, or replaced to fix the proble...
Definition: Diagnostic.h:52
void setLocation(SourceLocation L)
Definition: Token.h:133
A trivial tuple used to represent a source range.
void setIdentifier(const IdentifierInfo *Id, SourceLocation IdLoc)
Specify that this unqualified-id was parsed as an identifier.
Definition: DeclSpec.h:982
ParsedTemplateTy Template
The declaration of the template corresponding to the template-name.
AttributeList - Represents a syntactic attribute.
Definition: AttributeList.h:94
Stop skipping at specified token, but don&#39;t skip the token itself.
Definition: Parse/Parser.h:854
SourceLocation getEllipsisLoc() const
Definition: DeclSpec.h:2216
A RAII object to temporarily push a declaration context.
Definition: Sema.h:634
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:178