clang  5.0.0svn
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/AST/ASTContext.h"
15 #include "clang/AST/DeclTemplate.h"
17 #include "clang/Parse/Parser.h"
19 #include "clang/Sema/DeclSpec.h"
21 #include "clang/Sema/Scope.h"
22 using namespace clang;
23 
24 /// \brief Parse a template declaration, explicit instantiation, or
25 /// explicit specialization.
26 Decl *
27 Parser::ParseDeclarationStartingWithTemplate(unsigned Context,
28  SourceLocation &DeclEnd,
29  AccessSpecifier AS,
30  AttributeList *AccessAttrs) {
31  ObjCDeclContextSwitch ObjCDC(*this);
32 
33  if (Tok.is(tok::kw_template) && NextToken().isNot(tok::less)) {
34  return ParseExplicitInstantiation(Context,
36  DeclEnd, AS);
37  }
38  return ParseTemplateDeclarationOrSpecialization(Context, DeclEnd, AS,
39  AccessAttrs);
40 }
41 
42 
43 
44 /// \brief Parse a template declaration or an explicit specialization.
45 ///
46 /// Template declarations include one or more template parameter lists
47 /// and either the function or class template declaration. Explicit
48 /// specializations contain one or more 'template < >' prefixes
49 /// followed by a (possibly templated) declaration. Since the
50 /// syntactic form of both features is nearly identical, we parse all
51 /// of the template headers together and let semantic analysis sort
52 /// the declarations from the explicit specializations.
53 ///
54 /// template-declaration: [C++ temp]
55 /// 'export'[opt] 'template' '<' template-parameter-list '>' declaration
56 ///
57 /// explicit-specialization: [ C++ temp.expl.spec]
58 /// 'template' '<' '>' declaration
59 Decl *
60 Parser::ParseTemplateDeclarationOrSpecialization(unsigned Context,
61  SourceLocation &DeclEnd,
62  AccessSpecifier AS,
63  AttributeList *AccessAttrs) {
64  assert(Tok.isOneOf(tok::kw_export, tok::kw_template) &&
65  "Token does not start a template declaration.");
66 
67  // Enter template-parameter scope.
68  ParseScope TemplateParmScope(this, Scope::TemplateParamScope);
69 
70  // Tell the action that names should be checked in the context of
71  // the declaration to come.
73  ParsingTemplateParams(*this, ParsingDeclRAIIObject::NoParent);
74 
75  // Parse multiple levels of template headers within this template
76  // parameter scope, e.g.,
77  //
78  // template<typename T>
79  // template<typename U>
80  // class A<T>::B { ... };
81  //
82  // We parse multiple levels non-recursively so that we can build a
83  // single data structure containing all of the template parameter
84  // lists to easily differentiate between the case above and:
85  //
86  // template<typename T>
87  // class A {
88  // template<typename U> class B;
89  // };
90  //
91  // In the first case, the action for declaring A<T>::B receives
92  // both template parameter lists. In the second case, the action for
93  // defining A<T>::B receives just the inner template parameter list
94  // (and retrieves the outer template parameter list from its
95  // context).
96  bool isSpecialization = true;
97  bool LastParamListWasEmpty = false;
98  TemplateParameterLists ParamLists;
99  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
100 
101  do {
102  // Consume the 'export', if any.
103  SourceLocation ExportLoc;
104  TryConsumeToken(tok::kw_export, ExportLoc);
105 
106  // Consume the 'template', which should be here.
107  SourceLocation TemplateLoc;
108  if (!TryConsumeToken(tok::kw_template, TemplateLoc)) {
109  Diag(Tok.getLocation(), diag::err_expected_template);
110  return nullptr;
111  }
112 
113  // Parse the '<' template-parameter-list '>'
114  SourceLocation LAngleLoc, RAngleLoc;
115  SmallVector<Decl*, 4> TemplateParams;
116  if (ParseTemplateParameters(CurTemplateDepthTracker.getDepth(),
117  TemplateParams, LAngleLoc, RAngleLoc)) {
118  // Skip until the semi-colon or a '}'.
119  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
120  TryConsumeToken(tok::semi);
121  return nullptr;
122  }
123 
124  ExprResult OptionalRequiresClauseConstraintER;
125  if (!TemplateParams.empty()) {
126  isSpecialization = false;
127  ++CurTemplateDepthTracker;
128 
129  if (TryConsumeToken(tok::kw_requires)) {
130  OptionalRequiresClauseConstraintER =
132  if (!OptionalRequiresClauseConstraintER.isUsable()) {
133  // Skip until the semi-colon or a '}'.
134  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
135  TryConsumeToken(tok::semi);
136  return nullptr;
137  }
138  }
139  } else {
140  LastParamListWasEmpty = true;
141  }
142 
143  ParamLists.push_back(Actions.ActOnTemplateParameterList(
144  CurTemplateDepthTracker.getDepth(), ExportLoc, TemplateLoc, LAngleLoc,
145  TemplateParams, RAngleLoc, OptionalRequiresClauseConstraintER.get()));
146  } while (Tok.isOneOf(tok::kw_export, tok::kw_template));
147 
148  unsigned NewFlags = getCurScope()->getFlags() & ~Scope::TemplateParamScope;
149  ParseScopeFlags TemplateScopeFlags(this, NewFlags, isSpecialization);
150 
151  // Parse the actual template declaration.
152  return ParseSingleDeclarationAfterTemplate(Context,
153  ParsedTemplateInfo(&ParamLists,
154  isSpecialization,
155  LastParamListWasEmpty),
156  ParsingTemplateParams,
157  DeclEnd, AS, AccessAttrs);
158 }
159 
160 /// \brief Parse a single declaration that declares a template,
161 /// template specialization, or explicit instantiation of a template.
162 ///
163 /// \param DeclEnd will receive the source location of the last token
164 /// within this declaration.
165 ///
166 /// \param AS the access specifier associated with this
167 /// declaration. Will be AS_none for namespace-scope declarations.
168 ///
169 /// \returns the new declaration.
170 Decl *
171 Parser::ParseSingleDeclarationAfterTemplate(
172  unsigned Context,
173  const ParsedTemplateInfo &TemplateInfo,
174  ParsingDeclRAIIObject &DiagsFromTParams,
175  SourceLocation &DeclEnd,
176  AccessSpecifier AS,
177  AttributeList *AccessAttrs) {
178  assert(TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
179  "Template information required");
180 
181  if (Tok.is(tok::kw_static_assert)) {
182  // A static_assert declaration may not be templated.
183  Diag(Tok.getLocation(), diag::err_templated_invalid_declaration)
184  << TemplateInfo.getSourceRange();
185  // Parse the static_assert declaration to improve error recovery.
186  return ParseStaticAssertDeclaration(DeclEnd);
187  }
188 
189  if (Context == Declarator::MemberContext) {
190  // We are parsing a member template.
191  ParseCXXClassMemberDeclaration(AS, AccessAttrs, TemplateInfo,
192  &DiagsFromTParams);
193  return nullptr;
194  }
195 
196  ParsedAttributesWithRange prefixAttrs(AttrFactory);
197  MaybeParseCXX11Attributes(prefixAttrs);
198 
199  if (Tok.is(tok::kw_using)) {
200  // FIXME: We should return the DeclGroup to the caller.
201  ParseUsingDirectiveOrDeclaration(Context, TemplateInfo, DeclEnd,
202  prefixAttrs);
203  return nullptr;
204  }
205 
206  // Parse the declaration specifiers, stealing any diagnostics from
207  // the template parameters.
208  ParsingDeclSpec DS(*this, &DiagsFromTParams);
209 
210  ParseDeclarationSpecifiers(DS, TemplateInfo, AS,
211  getDeclSpecContextFromDeclaratorContext(Context));
212 
213  if (Tok.is(tok::semi)) {
214  ProhibitAttributes(prefixAttrs);
215  DeclEnd = ConsumeToken();
216  RecordDecl *AnonRecord = nullptr;
218  getCurScope(), AS, DS,
219  TemplateInfo.TemplateParams ? *TemplateInfo.TemplateParams
221  TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation,
222  AnonRecord);
223  assert(!AnonRecord &&
224  "Anonymous unions/structs should not be valid with template");
225  DS.complete(Decl);
226  return Decl;
227  }
228 
229  // Move the attributes from the prefix into the DS.
230  if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation)
231  ProhibitAttributes(prefixAttrs);
232  else
233  DS.takeAttributesFrom(prefixAttrs);
234 
235  // Parse the declarator.
236  ParsingDeclarator DeclaratorInfo(*this, DS, (Declarator::TheContext)Context);
237  ParseDeclarator(DeclaratorInfo);
238  // Error parsing the declarator?
239  if (!DeclaratorInfo.hasName()) {
240  // If so, skip until the semi-colon or a }.
241  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
242  if (Tok.is(tok::semi))
243  ConsumeToken();
244  return nullptr;
245  }
246 
247  LateParsedAttrList LateParsedAttrs(true);
248  if (DeclaratorInfo.isFunctionDeclarator())
249  MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs);
250 
251  if (DeclaratorInfo.isFunctionDeclarator() &&
252  isStartOfFunctionDefinition(DeclaratorInfo)) {
253 
254  // Function definitions are only allowed at file scope and in C++ classes.
255  // The C++ inline method definition case is handled elsewhere, so we only
256  // need to handle the file scope definition case.
257  if (Context != Declarator::FileContext) {
258  Diag(Tok, diag::err_function_definition_not_allowed);
260  return nullptr;
261  }
262 
263  if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
264  // Recover by ignoring the 'typedef'. This was probably supposed to be
265  // the 'typename' keyword, which we should have already suggested adding
266  // if it's appropriate.
267  Diag(DS.getStorageClassSpecLoc(), diag::err_function_declared_typedef)
268  << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc());
269  DS.ClearStorageClassSpecs();
270  }
271 
272  if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
273  if (DeclaratorInfo.getName().getKind() != UnqualifiedId::IK_TemplateId) {
274  // If the declarator-id is not a template-id, issue a diagnostic and
275  // recover by ignoring the 'template' keyword.
276  Diag(Tok, diag::err_template_defn_explicit_instantiation) << 0;
277  return ParseFunctionDefinition(DeclaratorInfo, ParsedTemplateInfo(),
278  &LateParsedAttrs);
279  } else {
280  SourceLocation LAngleLoc
281  = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc);
282  Diag(DeclaratorInfo.getIdentifierLoc(),
283  diag::err_explicit_instantiation_with_definition)
284  << SourceRange(TemplateInfo.TemplateLoc)
285  << FixItHint::CreateInsertion(LAngleLoc, "<>");
286 
287  // Recover as if it were an explicit specialization.
288  TemplateParameterLists FakedParamLists;
289  FakedParamLists.push_back(Actions.ActOnTemplateParameterList(
290  0, SourceLocation(), TemplateInfo.TemplateLoc, LAngleLoc, None,
291  LAngleLoc, nullptr));
292 
293  return ParseFunctionDefinition(
294  DeclaratorInfo, ParsedTemplateInfo(&FakedParamLists,
295  /*isSpecialization=*/true,
296  /*LastParamListWasEmpty=*/true),
297  &LateParsedAttrs);
298  }
299  }
300  return ParseFunctionDefinition(DeclaratorInfo, TemplateInfo,
301  &LateParsedAttrs);
302  }
303 
304  // Parse this declaration.
305  Decl *ThisDecl = ParseDeclarationAfterDeclarator(DeclaratorInfo,
306  TemplateInfo);
307 
308  if (Tok.is(tok::comma)) {
309  Diag(Tok, diag::err_multiple_template_declarators)
310  << (int)TemplateInfo.Kind;
311  SkipUntil(tok::semi);
312  return ThisDecl;
313  }
314 
315  // Eat the semi colon after the declaration.
316  ExpectAndConsumeSemi(diag::err_expected_semi_declaration);
317  if (LateParsedAttrs.size() > 0)
318  ParseLexedAttributeList(LateParsedAttrs, ThisDecl, true, false);
319  DeclaratorInfo.complete(ThisDecl);
320  return ThisDecl;
321 }
322 
323 /// ParseTemplateParameters - Parses a template-parameter-list enclosed in
324 /// angle brackets. Depth is the depth of this template-parameter-list, which
325 /// is the number of template headers directly enclosing this template header.
326 /// TemplateParams is the current list of template parameters we're building.
327 /// The template parameter we parse will be added to this list. LAngleLoc and
328 /// RAngleLoc will receive the positions of the '<' and '>', respectively,
329 /// that enclose this template parameter list.
330 ///
331 /// \returns true if an error occurred, false otherwise.
332 bool Parser::ParseTemplateParameters(unsigned Depth,
333  SmallVectorImpl<Decl*> &TemplateParams,
334  SourceLocation &LAngleLoc,
335  SourceLocation &RAngleLoc) {
336  // Get the template parameter list.
337  if (!TryConsumeToken(tok::less, LAngleLoc)) {
338  Diag(Tok.getLocation(), diag::err_expected_less_after) << "template";
339  return true;
340  }
341 
342  // Try to parse the template parameter list.
343  bool Failed = false;
344  if (!Tok.is(tok::greater) && !Tok.is(tok::greatergreater))
345  Failed = ParseTemplateParameterList(Depth, TemplateParams);
346 
347  if (Tok.is(tok::greatergreater)) {
348  // No diagnostic required here: a template-parameter-list can only be
349  // followed by a declaration or, for a template template parameter, the
350  // 'class' keyword. Therefore, the second '>' will be diagnosed later.
351  // This matters for elegant diagnosis of:
352  // template<template<typename>> struct S;
353  Tok.setKind(tok::greater);
354  RAngleLoc = Tok.getLocation();
356  } else if (!TryConsumeToken(tok::greater, RAngleLoc) && Failed) {
357  Diag(Tok.getLocation(), diag::err_expected) << tok::greater;
358  return true;
359  }
360  return false;
361 }
362 
363 /// ParseTemplateParameterList - Parse a template parameter list. If
364 /// the parsing fails badly (i.e., closing bracket was left out), this
365 /// will try to put the token stream in a reasonable position (closing
366 /// a statement, etc.) and return false.
367 ///
368 /// template-parameter-list: [C++ temp]
369 /// template-parameter
370 /// template-parameter-list ',' template-parameter
371 bool
372 Parser::ParseTemplateParameterList(unsigned Depth,
373  SmallVectorImpl<Decl*> &TemplateParams) {
374  while (1) {
375  if (Decl *TmpParam
376  = ParseTemplateParameter(Depth, TemplateParams.size())) {
377  TemplateParams.push_back(TmpParam);
378  } else {
379  // If we failed to parse a template parameter, skip until we find
380  // a comma or closing brace.
381  SkipUntil(tok::comma, tok::greater, tok::greatergreater,
383  }
384 
385  // Did we find a comma or the end of the template parameter list?
386  if (Tok.is(tok::comma)) {
387  ConsumeToken();
388  } else if (Tok.isOneOf(tok::greater, tok::greatergreater)) {
389  // Don't consume this... that's done by template parser.
390  break;
391  } else {
392  // Somebody probably forgot to close the template. Skip ahead and
393  // try to get out of the expression. This error is currently
394  // subsumed by whatever goes on in ParseTemplateParameter.
395  Diag(Tok.getLocation(), diag::err_expected_comma_greater);
396  SkipUntil(tok::comma, tok::greater, tok::greatergreater,
398  return false;
399  }
400  }
401  return true;
402 }
403 
404 /// \brief Determine whether the parser is at the start of a template
405 /// type parameter.
406 bool Parser::isStartOfTemplateTypeParameter() {
407  if (Tok.is(tok::kw_class)) {
408  // "class" may be the start of an elaborated-type-specifier or a
409  // type-parameter. Per C++ [temp.param]p3, we prefer the type-parameter.
410  switch (NextToken().getKind()) {
411  case tok::equal:
412  case tok::comma:
413  case tok::greater:
414  case tok::greatergreater:
415  case tok::ellipsis:
416  return true;
417 
418  case tok::identifier:
419  // This may be either a type-parameter or an elaborated-type-specifier.
420  // We have to look further.
421  break;
422 
423  default:
424  return false;
425  }
426 
427  switch (GetLookAheadToken(2).getKind()) {
428  case tok::equal:
429  case tok::comma:
430  case tok::greater:
431  case tok::greatergreater:
432  return true;
433 
434  default:
435  return false;
436  }
437  }
438 
439  if (Tok.isNot(tok::kw_typename))
440  return false;
441 
442  // C++ [temp.param]p2:
443  // There is no semantic difference between class and typename in a
444  // template-parameter. typename followed by an unqualified-id
445  // names a template type parameter. typename followed by a
446  // qualified-id denotes the type in a non-type
447  // parameter-declaration.
448  Token Next = NextToken();
449 
450  // If we have an identifier, skip over it.
451  if (Next.getKind() == tok::identifier)
452  Next = GetLookAheadToken(2);
453 
454  switch (Next.getKind()) {
455  case tok::equal:
456  case tok::comma:
457  case tok::greater:
458  case tok::greatergreater:
459  case tok::ellipsis:
460  return true;
461 
462  default:
463  return false;
464  }
465 }
466 
467 /// ParseTemplateParameter - Parse a template-parameter (C++ [temp.param]).
468 ///
469 /// template-parameter: [C++ temp.param]
470 /// type-parameter
471 /// parameter-declaration
472 ///
473 /// type-parameter: (see below)
474 /// 'class' ...[opt] identifier[opt]
475 /// 'class' identifier[opt] '=' type-id
476 /// 'typename' ...[opt] identifier[opt]
477 /// 'typename' identifier[opt] '=' type-id
478 /// 'template' '<' template-parameter-list '>'
479 /// 'class' ...[opt] identifier[opt]
480 /// 'template' '<' template-parameter-list '>' 'class' identifier[opt]
481 /// = id-expression
482 Decl *Parser::ParseTemplateParameter(unsigned Depth, unsigned Position) {
483  if (isStartOfTemplateTypeParameter())
484  return ParseTypeParameter(Depth, Position);
485 
486  if (Tok.is(tok::kw_template))
487  return ParseTemplateTemplateParameter(Depth, Position);
488 
489  // If it's none of the above, then it must be a parameter declaration.
490  // NOTE: This will pick up errors in the closure of the template parameter
491  // list (e.g., template < ; Check here to implement >> style closures.
492  return ParseNonTypeTemplateParameter(Depth, Position);
493 }
494 
495 /// ParseTypeParameter - Parse a template type parameter (C++ [temp.param]).
496 /// Other kinds of template parameters are parsed in
497 /// ParseTemplateTemplateParameter and ParseNonTypeTemplateParameter.
498 ///
499 /// type-parameter: [C++ temp.param]
500 /// 'class' ...[opt][C++0x] identifier[opt]
501 /// 'class' identifier[opt] '=' type-id
502 /// 'typename' ...[opt][C++0x] identifier[opt]
503 /// 'typename' identifier[opt] '=' type-id
504 Decl *Parser::ParseTypeParameter(unsigned Depth, unsigned Position) {
505  assert(Tok.isOneOf(tok::kw_class, tok::kw_typename) &&
506  "A type-parameter starts with 'class' or 'typename'");
507 
508  // Consume the 'class' or 'typename' keyword.
509  bool TypenameKeyword = Tok.is(tok::kw_typename);
510  SourceLocation KeyLoc = ConsumeToken();
511 
512  // Grab the ellipsis (if given).
513  SourceLocation EllipsisLoc;
514  if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) {
515  Diag(EllipsisLoc,
517  ? diag::warn_cxx98_compat_variadic_templates
518  : diag::ext_variadic_templates);
519  }
520 
521  // Grab the template parameter name (if given)
522  SourceLocation NameLoc;
523  IdentifierInfo *ParamName = nullptr;
524  if (Tok.is(tok::identifier)) {
525  ParamName = Tok.getIdentifierInfo();
526  NameLoc = ConsumeToken();
527  } else if (Tok.isOneOf(tok::equal, tok::comma, tok::greater,
528  tok::greatergreater)) {
529  // Unnamed template parameter. Don't have to do anything here, just
530  // don't consume this token.
531  } else {
532  Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
533  return nullptr;
534  }
535 
536  // Recover from misplaced ellipsis.
537  bool AlreadyHasEllipsis = EllipsisLoc.isValid();
538  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
539  DiagnoseMisplacedEllipsis(EllipsisLoc, NameLoc, AlreadyHasEllipsis, true);
540 
541  // Grab a default argument (if available).
542  // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before
543  // we introduce the type parameter into the local scope.
544  SourceLocation EqualLoc;
545  ParsedType DefaultArg;
546  if (TryConsumeToken(tok::equal, EqualLoc))
547  DefaultArg = ParseTypeName(/*Range=*/nullptr,
549 
550  return Actions.ActOnTypeParameter(getCurScope(), TypenameKeyword, EllipsisLoc,
551  KeyLoc, ParamName, NameLoc, Depth, Position,
552  EqualLoc, DefaultArg);
553 }
554 
555 /// ParseTemplateTemplateParameter - Handle the parsing of template
556 /// template parameters.
557 ///
558 /// type-parameter: [C++ temp.param]
559 /// 'template' '<' template-parameter-list '>' type-parameter-key
560 /// ...[opt] identifier[opt]
561 /// 'template' '<' template-parameter-list '>' type-parameter-key
562 /// identifier[opt] = id-expression
563 /// type-parameter-key:
564 /// 'class'
565 /// 'typename' [C++1z]
566 Decl *
567 Parser::ParseTemplateTemplateParameter(unsigned Depth, unsigned Position) {
568  assert(Tok.is(tok::kw_template) && "Expected 'template' keyword");
569 
570  // Handle the template <...> part.
571  SourceLocation TemplateLoc = ConsumeToken();
572  SmallVector<Decl*,8> TemplateParams;
573  SourceLocation LAngleLoc, RAngleLoc;
574  {
575  ParseScope TemplateParmScope(this, Scope::TemplateParamScope);
576  if (ParseTemplateParameters(Depth + 1, TemplateParams, LAngleLoc,
577  RAngleLoc)) {
578  return nullptr;
579  }
580  }
581 
582  // Provide an ExtWarn if the C++1z feature of using 'typename' here is used.
583  // Generate a meaningful error if the user forgot to put class before the
584  // identifier, comma, or greater. Provide a fixit if the identifier, comma,
585  // or greater appear immediately or after 'struct'. In the latter case,
586  // replace the keyword with 'class'.
587  if (!TryConsumeToken(tok::kw_class)) {
588  bool Replace = Tok.isOneOf(tok::kw_typename, tok::kw_struct);
589  const Token &Next = Tok.is(tok::kw_struct) ? NextToken() : Tok;
590  if (Tok.is(tok::kw_typename)) {
591  Diag(Tok.getLocation(),
592  getLangOpts().CPlusPlus1z
593  ? diag::warn_cxx14_compat_template_template_param_typename
594  : diag::ext_template_template_param_typename)
595  << (!getLangOpts().CPlusPlus1z
596  ? FixItHint::CreateReplacement(Tok.getLocation(), "class")
597  : FixItHint());
598  } else if (Next.isOneOf(tok::identifier, tok::comma, tok::greater,
599  tok::greatergreater, tok::ellipsis)) {
600  Diag(Tok.getLocation(), diag::err_class_on_template_template_param)
601  << (Replace ? FixItHint::CreateReplacement(Tok.getLocation(), "class")
602  : FixItHint::CreateInsertion(Tok.getLocation(), "class "));
603  } else
604  Diag(Tok.getLocation(), diag::err_class_on_template_template_param);
605 
606  if (Replace)
607  ConsumeToken();
608  }
609 
610  // Parse the ellipsis, if given.
611  SourceLocation EllipsisLoc;
612  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
613  Diag(EllipsisLoc,
615  ? diag::warn_cxx98_compat_variadic_templates
616  : diag::ext_variadic_templates);
617 
618  // Get the identifier, if given.
619  SourceLocation NameLoc;
620  IdentifierInfo *ParamName = nullptr;
621  if (Tok.is(tok::identifier)) {
622  ParamName = Tok.getIdentifierInfo();
623  NameLoc = ConsumeToken();
624  } else if (Tok.isOneOf(tok::equal, tok::comma, tok::greater,
625  tok::greatergreater)) {
626  // Unnamed template parameter. Don't have to do anything here, just
627  // don't consume this token.
628  } else {
629  Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
630  return nullptr;
631  }
632 
633  // Recover from misplaced ellipsis.
634  bool AlreadyHasEllipsis = EllipsisLoc.isValid();
635  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
636  DiagnoseMisplacedEllipsis(EllipsisLoc, NameLoc, AlreadyHasEllipsis, true);
637 
638  TemplateParameterList *ParamList =
640  TemplateLoc, LAngleLoc,
641  TemplateParams,
642  RAngleLoc, nullptr);
643 
644  // Grab a default argument (if available).
645  // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before
646  // we introduce the template parameter into the local scope.
647  SourceLocation EqualLoc;
648  ParsedTemplateArgument DefaultArg;
649  if (TryConsumeToken(tok::equal, EqualLoc)) {
650  DefaultArg = ParseTemplateTemplateArgument();
651  if (DefaultArg.isInvalid()) {
652  Diag(Tok.getLocation(),
653  diag::err_default_template_template_parameter_not_template);
654  SkipUntil(tok::comma, tok::greater, tok::greatergreater,
656  }
657  }
658 
659  return Actions.ActOnTemplateTemplateParameter(getCurScope(), TemplateLoc,
660  ParamList, EllipsisLoc,
661  ParamName, NameLoc, Depth,
662  Position, EqualLoc, DefaultArg);
663 }
664 
665 /// ParseNonTypeTemplateParameter - Handle the parsing of non-type
666 /// template parameters (e.g., in "template<int Size> class array;").
667 ///
668 /// template-parameter:
669 /// ...
670 /// parameter-declaration
671 Decl *
672 Parser::ParseNonTypeTemplateParameter(unsigned Depth, unsigned Position) {
673  // Parse the declaration-specifiers (i.e., the type).
674  // FIXME: The type should probably be restricted in some way... Not all
675  // declarators (parts of declarators?) are accepted for parameters.
676  DeclSpec DS(AttrFactory);
677  ParseDeclarationSpecifiers(DS);
678 
679  // Parse this as a typename.
681  ParseDeclarator(ParamDecl);
682  if (DS.getTypeSpecType() == DeclSpec::TST_unspecified) {
683  Diag(Tok.getLocation(), diag::err_expected_template_parameter);
684  return nullptr;
685  }
686 
687  // Recover from misplaced ellipsis.
688  SourceLocation EllipsisLoc;
689  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
690  DiagnoseMisplacedEllipsisInDeclarator(EllipsisLoc, ParamDecl);
691 
692  // If there is a default value, parse it.
693  // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before
694  // we introduce the template parameter into the local scope.
695  SourceLocation EqualLoc;
696  ExprResult DefaultArg;
697  if (TryConsumeToken(tok::equal, EqualLoc)) {
698  // C++ [temp.param]p15:
699  // When parsing a default template-argument for a non-type
700  // template-parameter, the first non-nested > is taken as the
701  // end of the template-parameter-list rather than a greater-than
702  // operator.
703  GreaterThanIsOperatorScope G(GreaterThanIsOperator, false);
704  EnterExpressionEvaluationContext ConstantEvaluated(
706 
708  if (DefaultArg.isInvalid())
709  SkipUntil(tok::comma, tok::greater, StopAtSemi | StopBeforeMatch);
710  }
711 
712  // Create the parameter.
713  return Actions.ActOnNonTypeTemplateParameter(getCurScope(), ParamDecl,
714  Depth, Position, EqualLoc,
715  DefaultArg.get());
716 }
717 
718 void Parser::DiagnoseMisplacedEllipsis(SourceLocation EllipsisLoc,
719  SourceLocation CorrectLoc,
720  bool AlreadyHasEllipsis,
721  bool IdentifierHasName) {
722  FixItHint Insertion;
723  if (!AlreadyHasEllipsis)
724  Insertion = FixItHint::CreateInsertion(CorrectLoc, "...");
725  Diag(EllipsisLoc, diag::err_misplaced_ellipsis_in_declaration)
726  << FixItHint::CreateRemoval(EllipsisLoc) << Insertion
727  << !IdentifierHasName;
728 }
729 
730 void Parser::DiagnoseMisplacedEllipsisInDeclarator(SourceLocation EllipsisLoc,
731  Declarator &D) {
732  assert(EllipsisLoc.isValid());
733  bool AlreadyHasEllipsis = D.getEllipsisLoc().isValid();
734  if (!AlreadyHasEllipsis)
735  D.setEllipsisLoc(EllipsisLoc);
736  DiagnoseMisplacedEllipsis(EllipsisLoc, D.getIdentifierLoc(),
737  AlreadyHasEllipsis, D.hasName());
738 }
739 
740 /// \brief Parses a '>' at the end of a template list.
741 ///
742 /// If this function encounters '>>', '>>>', '>=', or '>>=', it tries
743 /// to determine if these tokens were supposed to be a '>' followed by
744 /// '>', '>>', '>=', or '>='. It emits an appropriate diagnostic if necessary.
745 ///
746 /// \param RAngleLoc the location of the consumed '>'.
747 ///
748 /// \param ConsumeLastToken if true, the '>' is consumed.
749 ///
750 /// \param ObjCGenericList if true, this is the '>' closing an Objective-C
751 /// type parameter or type argument list, rather than a C++ template parameter
752 /// or argument list.
753 ///
754 /// \returns true, if current token does not start with '>', false otherwise.
755 bool Parser::ParseGreaterThanInTemplateList(SourceLocation &RAngleLoc,
756  bool ConsumeLastToken,
757  bool ObjCGenericList) {
758  // What will be left once we've consumed the '>'.
759  tok::TokenKind RemainingToken;
760  const char *ReplacementStr = "> >";
761 
762  switch (Tok.getKind()) {
763  default:
764  Diag(Tok.getLocation(), diag::err_expected) << tok::greater;
765  return true;
766 
767  case tok::greater:
768  // Determine the location of the '>' token. Only consume this token
769  // if the caller asked us to.
770  RAngleLoc = Tok.getLocation();
771  if (ConsumeLastToken)
772  ConsumeToken();
773  return false;
774 
775  case tok::greatergreater:
776  RemainingToken = tok::greater;
777  break;
778 
779  case tok::greatergreatergreater:
780  RemainingToken = tok::greatergreater;
781  break;
782 
783  case tok::greaterequal:
784  RemainingToken = tok::equal;
785  ReplacementStr = "> =";
786  break;
787 
788  case tok::greatergreaterequal:
789  RemainingToken = tok::greaterequal;
790  break;
791  }
792 
793  // This template-id is terminated by a token which starts with a '>'. Outside
794  // C++11, this is now error recovery, and in C++11, this is error recovery if
795  // the token isn't '>>' or '>>>'.
796  // '>>>' is for CUDA, where this sequence of characters is parsed into
797  // tok::greatergreatergreater, rather than two separate tokens.
798  //
799  // We always allow this for Objective-C type parameter and type argument
800  // lists.
801  RAngleLoc = Tok.getLocation();
802  Token Next = NextToken();
803  if (!ObjCGenericList) {
804  // The source range of the '>>' or '>=' at the start of the token.
805  CharSourceRange ReplacementRange =
808  getLangOpts()));
809 
810  // A hint to put a space between the '>>'s. In order to make the hint as
811  // clear as possible, we include the characters either side of the space in
812  // the replacement, rather than just inserting a space at SecondCharLoc.
813  FixItHint Hint1 = FixItHint::CreateReplacement(ReplacementRange,
814  ReplacementStr);
815 
816  // A hint to put another space after the token, if it would otherwise be
817  // lexed differently.
818  FixItHint Hint2;
819  if ((RemainingToken == tok::greater ||
820  RemainingToken == tok::greatergreater) &&
821  (Next.isOneOf(tok::greater, tok::greatergreater,
822  tok::greatergreatergreater, tok::equal,
823  tok::greaterequal, tok::greatergreaterequal,
824  tok::equalequal)) &&
825  areTokensAdjacent(Tok, Next))
826  Hint2 = FixItHint::CreateInsertion(Next.getLocation(), " ");
827 
828  unsigned DiagId = diag::err_two_right_angle_brackets_need_space;
829  if (getLangOpts().CPlusPlus11 &&
830  (Tok.is(tok::greatergreater) || Tok.is(tok::greatergreatergreater)))
831  DiagId = diag::warn_cxx98_compat_two_right_angle_brackets;
832  else if (Tok.is(tok::greaterequal))
833  DiagId = diag::err_right_angle_bracket_equal_needs_space;
834  Diag(Tok.getLocation(), DiagId) << Hint1 << Hint2;
835  }
836 
837  // Strip the initial '>' from the token.
838  Token PrevTok = Tok;
839  if (RemainingToken == tok::equal && Next.is(tok::equal) &&
840  areTokensAdjacent(Tok, Next)) {
841  // Join two adjacent '=' tokens into one, for cases like:
842  // void (*p)() = f<int>;
843  // return f<int>==p;
844  ConsumeToken();
845  Tok.setKind(tok::equalequal);
846  Tok.setLength(Tok.getLength() + 1);
847  } else {
848  Tok.setKind(RemainingToken);
849  Tok.setLength(Tok.getLength() - 1);
850  }
852  PP.getSourceManager(),
853  getLangOpts()));
854 
855  // The advance from '>>' to '>' in a ObjectiveC template argument list needs
856  // to be properly reflected in the token cache to allow correct interaction
857  // between annotation and backtracking.
858  if (ObjCGenericList && PrevTok.getKind() == tok::greatergreater &&
859  RemainingToken == tok::greater && PP.IsPreviousCachedToken(PrevTok)) {
860  PrevTok.setKind(RemainingToken);
861  PrevTok.setLength(1);
862  // Break tok::greatergreater into two tok::greater but only add the second
863  // one in case the client asks to consume the last token.
864  if (ConsumeLastToken)
865  PP.ReplacePreviousCachedToken({PrevTok, Tok});
866  else
867  PP.ReplacePreviousCachedToken({PrevTok});
868  }
869 
870  if (!ConsumeLastToken) {
871  // Since we're not supposed to consume the '>' token, we need to push
872  // this token and revert the current token back to the '>'.
873  PP.EnterToken(Tok);
874  Tok.setKind(tok::greater);
875  Tok.setLength(1);
876  Tok.setLocation(RAngleLoc);
877  }
878  return false;
879 }
880 
881 
882 /// \brief Parses a template-id that after the template name has
883 /// already been parsed.
884 ///
885 /// This routine takes care of parsing the enclosed template argument
886 /// list ('<' template-parameter-list [opt] '>') and placing the
887 /// results into a form that can be transferred to semantic analysis.
888 ///
889 /// \param ConsumeLastToken if true, then we will consume the last
890 /// token that forms the template-id. Otherwise, we will leave the
891 /// last token in the stream (e.g., so that it can be replaced with an
892 /// annotation token).
893 bool
894 Parser::ParseTemplateIdAfterTemplateName(bool ConsumeLastToken,
895  SourceLocation &LAngleLoc,
896  TemplateArgList &TemplateArgs,
897  SourceLocation &RAngleLoc) {
898  assert(Tok.is(tok::less) && "Must have already parsed the template-name");
899 
900  // Consume the '<'.
901  LAngleLoc = ConsumeToken();
902 
903  // Parse the optional template-argument-list.
904  bool Invalid = false;
905  {
906  GreaterThanIsOperatorScope G(GreaterThanIsOperator, false);
907  if (Tok.isNot(tok::greater) && Tok.isNot(tok::greatergreater))
908  Invalid = ParseTemplateArgumentList(TemplateArgs);
909 
910  if (Invalid) {
911  // Try to find the closing '>'.
912  if (ConsumeLastToken)
913  SkipUntil(tok::greater, StopAtSemi);
914  else
915  SkipUntil(tok::greater, StopAtSemi | StopBeforeMatch);
916  return true;
917  }
918  }
919 
920  return ParseGreaterThanInTemplateList(RAngleLoc, ConsumeLastToken,
921  /*ObjCGenericList=*/false);
922 }
923 
924 /// \brief Replace the tokens that form a simple-template-id with an
925 /// annotation token containing the complete template-id.
926 ///
927 /// The first token in the stream must be the name of a template that
928 /// is followed by a '<'. This routine will parse the complete
929 /// simple-template-id and replace the tokens with a single annotation
930 /// token with one of two different kinds: if the template-id names a
931 /// type (and \p AllowTypeAnnotation is true), the annotation token is
932 /// a type annotation that includes the optional nested-name-specifier
933 /// (\p SS). Otherwise, the annotation token is a template-id
934 /// annotation that does not include the optional
935 /// nested-name-specifier.
936 ///
937 /// \param Template the declaration of the template named by the first
938 /// token (an identifier), as returned from \c Action::isTemplateName().
939 ///
940 /// \param TNK the kind of template that \p Template
941 /// refers to, as returned from \c Action::isTemplateName().
942 ///
943 /// \param SS if non-NULL, the nested-name-specifier that precedes
944 /// this template name.
945 ///
946 /// \param TemplateKWLoc if valid, specifies that this template-id
947 /// annotation was preceded by the 'template' keyword and gives the
948 /// location of that keyword. If invalid (the default), then this
949 /// template-id was not preceded by a 'template' keyword.
950 ///
951 /// \param AllowTypeAnnotation if true (the default), then a
952 /// simple-template-id that refers to a class template, template
953 /// template parameter, or other template that produces a type will be
954 /// replaced with a type annotation token. Otherwise, the
955 /// simple-template-id is always replaced with a template-id
956 /// annotation token.
957 ///
958 /// If an unrecoverable parse error occurs and no annotation token can be
959 /// formed, this function returns true.
960 ///
961 bool Parser::AnnotateTemplateIdToken(TemplateTy Template, TemplateNameKind TNK,
962  CXXScopeSpec &SS,
963  SourceLocation TemplateKWLoc,
965  bool AllowTypeAnnotation) {
966  assert(getLangOpts().CPlusPlus && "Can only annotate template-ids in C++");
967  assert(Template && Tok.is(tok::less) &&
968  "Parser isn't at the beginning of a template-id");
969 
970  // Consume the template-name.
971  SourceLocation TemplateNameLoc = TemplateName.getSourceRange().getBegin();
972 
973  // Parse the enclosed template argument list.
974  SourceLocation LAngleLoc, RAngleLoc;
975  TemplateArgList TemplateArgs;
976  bool Invalid = ParseTemplateIdAfterTemplateName(false, LAngleLoc,
977  TemplateArgs,
978  RAngleLoc);
979 
980  if (Invalid) {
981  // If we failed to parse the template ID but skipped ahead to a >, we're not
982  // going to be able to form a token annotation. Eat the '>' if present.
983  TryConsumeToken(tok::greater);
984  return true;
985  }
986 
987  ASTTemplateArgsPtr TemplateArgsPtr(TemplateArgs);
988 
989  // Build the annotation token.
990  if (TNK == TNK_Type_template && AllowTypeAnnotation) {
992  SS, TemplateKWLoc, Template, TemplateName.Identifier,
993  TemplateNameLoc, LAngleLoc, TemplateArgsPtr, RAngleLoc);
994  if (Type.isInvalid()) {
995  // If we failed to parse the template ID but skipped ahead to a >, we're
996  // not going to be able to form a token annotation. Eat the '>' if
997  // present.
998  TryConsumeToken(tok::greater);
999  return true;
1000  }
1001 
1002  Tok.setKind(tok::annot_typename);
1003  setTypeAnnotation(Tok, Type.get());
1004  if (SS.isNotEmpty())
1005  Tok.setLocation(SS.getBeginLoc());
1006  else if (TemplateKWLoc.isValid())
1007  Tok.setLocation(TemplateKWLoc);
1008  else
1009  Tok.setLocation(TemplateNameLoc);
1010  } else {
1011  // Build a template-id annotation token that can be processed
1012  // later.
1013  Tok.setKind(tok::annot_template_id);
1014 
1015  IdentifierInfo *TemplateII =
1016  TemplateName.getKind() == UnqualifiedId::IK_Identifier
1017  ? TemplateName.Identifier
1018  : nullptr;
1019 
1020  OverloadedOperatorKind OpKind =
1021  TemplateName.getKind() == UnqualifiedId::IK_Identifier
1022  ? OO_None
1023  : TemplateName.OperatorFunctionId.Operator;
1024 
1026  SS, TemplateKWLoc, TemplateNameLoc, TemplateII, OpKind, Template, TNK,
1027  LAngleLoc, RAngleLoc, TemplateArgs, TemplateIds);
1028 
1029  Tok.setAnnotationValue(TemplateId);
1030  if (TemplateKWLoc.isValid())
1031  Tok.setLocation(TemplateKWLoc);
1032  else
1033  Tok.setLocation(TemplateNameLoc);
1034  }
1035 
1036  // Common fields for the annotation token
1037  Tok.setAnnotationEndLoc(RAngleLoc);
1038 
1039  // In case the tokens were cached, have Preprocessor replace them with the
1040  // annotation token.
1041  PP.AnnotateCachedTokens(Tok);
1042  return false;
1043 }
1044 
1045 /// \brief Replaces a template-id annotation token with a type
1046 /// annotation token.
1047 ///
1048 /// If there was a failure when forming the type from the template-id,
1049 /// a type annotation token will still be created, but will have a
1050 /// NULL type pointer to signify an error.
1051 ///
1052 /// \param IsClassName Is this template-id appearing in a context where we
1053 /// know it names a class, such as in an elaborated-type-specifier or
1054 /// base-specifier? ('typename' and 'template' are unneeded and disallowed
1055 /// in those contexts.)
1056 void Parser::AnnotateTemplateIdTokenAsType(bool IsClassName) {
1057  assert(Tok.is(tok::annot_template_id) && "Requires template-id tokens");
1058 
1059  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1060  assert((TemplateId->Kind == TNK_Type_template ||
1061  TemplateId->Kind == TNK_Dependent_template_name) &&
1062  "Only works for type and dependent templates");
1063 
1064  ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
1065  TemplateId->NumArgs);
1066 
1067  TypeResult Type
1068  = Actions.ActOnTemplateIdType(TemplateId->SS,
1069  TemplateId->TemplateKWLoc,
1070  TemplateId->Template,
1071  TemplateId->Name,
1072  TemplateId->TemplateNameLoc,
1073  TemplateId->LAngleLoc,
1074  TemplateArgsPtr,
1075  TemplateId->RAngleLoc,
1076  /*IsCtorOrDtorName*/false,
1077  IsClassName);
1078  // Create the new "type" annotation token.
1079  Tok.setKind(tok::annot_typename);
1080  setTypeAnnotation(Tok, Type.isInvalid() ? nullptr : Type.get());
1081  if (TemplateId->SS.isNotEmpty()) // it was a C++ qualified type name.
1082  Tok.setLocation(TemplateId->SS.getBeginLoc());
1083  // End location stays the same
1084 
1085  // Replace the template-id annotation token, and possible the scope-specifier
1086  // that precedes it, with the typename annotation token.
1087  PP.AnnotateCachedTokens(Tok);
1088 }
1089 
1090 /// \brief Determine whether the given token can end a template argument.
1091 static bool isEndOfTemplateArgument(Token Tok) {
1092  return Tok.isOneOf(tok::comma, tok::greater, tok::greatergreater);
1093 }
1094 
1095 /// \brief Parse a C++ template template argument.
1096 ParsedTemplateArgument Parser::ParseTemplateTemplateArgument() {
1097  if (!Tok.is(tok::identifier) && !Tok.is(tok::coloncolon) &&
1098  !Tok.is(tok::annot_cxxscope))
1099  return ParsedTemplateArgument();
1100 
1101  // C++0x [temp.arg.template]p1:
1102  // A template-argument for a template template-parameter shall be the name
1103  // of a class template or an alias template, expressed as id-expression.
1104  //
1105  // We parse an id-expression that refers to a class template or alias
1106  // template. The grammar we parse is:
1107  //
1108  // nested-name-specifier[opt] template[opt] identifier ...[opt]
1109  //
1110  // followed by a token that terminates a template argument, such as ',',
1111  // '>', or (in some cases) '>>'.
1112  CXXScopeSpec SS; // nested-name-specifier, if present
1113  ParseOptionalCXXScopeSpecifier(SS, nullptr,
1114  /*EnteringContext=*/false);
1115 
1117  SourceLocation EllipsisLoc;
1118  if (SS.isSet() && Tok.is(tok::kw_template)) {
1119  // Parse the optional 'template' keyword following the
1120  // nested-name-specifier.
1121  SourceLocation TemplateKWLoc = ConsumeToken();
1122 
1123  if (Tok.is(tok::identifier)) {
1124  // We appear to have a dependent template name.
1125  UnqualifiedId Name;
1126  Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1127  ConsumeToken(); // the identifier
1128 
1129  TryConsumeToken(tok::ellipsis, EllipsisLoc);
1130 
1131  // If the next token signals the end of a template argument,
1132  // then we have a dependent template name that could be a template
1133  // template argument.
1134  TemplateTy Template;
1135  if (isEndOfTemplateArgument(Tok) &&
1137  getCurScope(), SS, TemplateKWLoc, Name,
1138  /*ObjectType=*/nullptr,
1139  /*EnteringContext=*/false, Template))
1140  Result = ParsedTemplateArgument(SS, Template, Name.StartLocation);
1141  }
1142  } else if (Tok.is(tok::identifier)) {
1143  // We may have a (non-dependent) template name.
1144  TemplateTy Template;
1145  UnqualifiedId Name;
1146  Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1147  ConsumeToken(); // the identifier
1148 
1149  TryConsumeToken(tok::ellipsis, EllipsisLoc);
1150 
1151  if (isEndOfTemplateArgument(Tok)) {
1152  bool MemberOfUnknownSpecialization;
1153  TemplateNameKind TNK = Actions.isTemplateName(
1154  getCurScope(), SS,
1155  /*hasTemplateKeyword=*/false, Name,
1156  /*ObjectType=*/nullptr,
1157  /*EnteringContext=*/false, Template, MemberOfUnknownSpecialization);
1158  if (TNK == TNK_Dependent_template_name || TNK == TNK_Type_template) {
1159  // We have an id-expression that refers to a class template or
1160  // (C++0x) alias template.
1161  Result = ParsedTemplateArgument(SS, Template, Name.StartLocation);
1162  }
1163  }
1164  }
1165 
1166  // If this is a pack expansion, build it as such.
1167  if (EllipsisLoc.isValid() && !Result.isInvalid())
1168  Result = Actions.ActOnPackExpansion(Result, EllipsisLoc);
1169 
1170  return Result;
1171 }
1172 
1173 /// ParseTemplateArgument - Parse a C++ template argument (C++ [temp.names]).
1174 ///
1175 /// template-argument: [C++ 14.2]
1176 /// constant-expression
1177 /// type-id
1178 /// id-expression
1179 ParsedTemplateArgument Parser::ParseTemplateArgument() {
1180  // C++ [temp.arg]p2:
1181  // In a template-argument, an ambiguity between a type-id and an
1182  // expression is resolved to a type-id, regardless of the form of
1183  // the corresponding template-parameter.
1184  //
1185  // Therefore, we initially try to parse a type-id - and isCXXTypeId might look
1186  // up and annotate an identifier as an id-expression during disambiguation,
1187  // so enter the appropriate context for a constant expression template
1188  // argument before trying to disambiguate.
1189 
1190  EnterExpressionEvaluationContext EnterConstantEvaluated(
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  ConsumeAnyToken();
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  ConsumeAnyToken();
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 
1268  ColonProtectionRAIIObject ColonProtection(*this, false);
1269 
1270  do {
1271  ParsedTemplateArgument Arg = ParseTemplateArgument();
1272  SourceLocation EllipsisLoc;
1273  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
1274  Arg = Actions.ActOnPackExpansion(Arg, EllipsisLoc);
1275 
1276  if (Arg.isInvalid()) {
1277  SkipUntil(tok::comma, tok::greater, StopAtSemi | StopBeforeMatch);
1278  return true;
1279  }
1280 
1281  // Save this template argument.
1282  TemplateArgs.push_back(Arg);
1283 
1284  // If the next token is a comma, consume it and keep reading
1285  // arguments.
1286  } while (TryConsumeToken(tok::comma));
1287 
1288  return false;
1289 }
1290 
1291 /// \brief Parse a C++ explicit template instantiation
1292 /// (C++ [temp.explicit]).
1293 ///
1294 /// explicit-instantiation:
1295 /// 'extern' [opt] 'template' declaration
1296 ///
1297 /// Note that the 'extern' is a GNU extension and C++11 feature.
1298 Decl *Parser::ParseExplicitInstantiation(unsigned Context,
1299  SourceLocation ExternLoc,
1300  SourceLocation TemplateLoc,
1301  SourceLocation &DeclEnd,
1302  AccessSpecifier AS) {
1303  // This isn't really required here.
1305  ParsingTemplateParams(*this, ParsingDeclRAIIObject::NoParent);
1306 
1307  return ParseSingleDeclarationAfterTemplate(Context,
1308  ParsedTemplateInfo(ExternLoc,
1309  TemplateLoc),
1310  ParsingTemplateParams,
1311  DeclEnd, AS);
1312 }
1313 
1315  if (TemplateParams)
1316  return getTemplateParamsRange(TemplateParams->data(),
1317  TemplateParams->size());
1318 
1319  SourceRange R(TemplateLoc);
1320  if (ExternLoc.isValid())
1321  R.setBegin(ExternLoc);
1322  return R;
1323 }
1324 
1325 void Parser::LateTemplateParserCallback(void *P, LateParsedTemplate &LPT) {
1326  ((Parser *)P)->ParseLateTemplatedFuncDef(LPT);
1327 }
1328 
1329 /// \brief Late parse a C++ function template in Microsoft mode.
1330 void Parser::ParseLateTemplatedFuncDef(LateParsedTemplate &LPT) {
1331  if (!LPT.D)
1332  return;
1333 
1334  // Get the FunctionDecl.
1335  FunctionDecl *FunD = LPT.D->getAsFunction();
1336  // Track template parameter depth.
1337  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
1338 
1339  // To restore the context after late parsing.
1340  Sema::ContextRAII GlobalSavedContext(
1341  Actions, Actions.Context.getTranslationUnitDecl());
1342 
1343  SmallVector<ParseScope*, 4> TemplateParamScopeStack;
1344 
1345  // Get the list of DeclContexts to reenter.
1346  SmallVector<DeclContext*, 4> DeclContextsToReenter;
1347  DeclContext *DD = FunD;
1348  while (DD && !DD->isTranslationUnit()) {
1349  DeclContextsToReenter.push_back(DD);
1350  DD = DD->getLexicalParent();
1351  }
1352 
1353  // Reenter template scopes from outermost to innermost.
1355  DeclContextsToReenter.rbegin();
1356  for (; II != DeclContextsToReenter.rend(); ++II) {
1357  TemplateParamScopeStack.push_back(new ParseScope(this,
1359  unsigned NumParamLists =
1360  Actions.ActOnReenterTemplateScope(getCurScope(), cast<Decl>(*II));
1361  CurTemplateDepthTracker.addDepth(NumParamLists);
1362  if (*II != FunD) {
1363  TemplateParamScopeStack.push_back(new ParseScope(this, Scope::DeclScope));
1364  Actions.PushDeclContext(Actions.getCurScope(), *II);
1365  }
1366  }
1367 
1368  assert(!LPT.Toks.empty() && "Empty body!");
1369 
1370  // Append the current token at the end of the new token stream so that it
1371  // doesn't get lost.
1372  LPT.Toks.push_back(Tok);
1373  PP.EnterTokenStream(LPT.Toks, true);
1374 
1375  // Consume the previously pushed token.
1376  ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
1377  assert(Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try) &&
1378  "Inline method not starting with '{', ':' or 'try'");
1379 
1380  // Parse the method body. Function body parsing code is similar enough
1381  // to be re-used for method bodies as well.
1382  ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope);
1383 
1384  // Recreate the containing function DeclContext.
1385  Sema::ContextRAII FunctionSavedContext(Actions,
1386  Actions.getContainingDC(FunD));
1387 
1388  Actions.ActOnStartOfFunctionDef(getCurScope(), FunD);
1389 
1390  if (Tok.is(tok::kw_try)) {
1391  ParseFunctionTryBlock(LPT.D, FnScope);
1392  } else {
1393  if (Tok.is(tok::colon))
1394  ParseConstructorInitializer(LPT.D);
1395  else
1396  Actions.ActOnDefaultCtorInitializers(LPT.D);
1397 
1398  if (Tok.is(tok::l_brace)) {
1399  assert((!isa<FunctionTemplateDecl>(LPT.D) ||
1400  cast<FunctionTemplateDecl>(LPT.D)
1401  ->getTemplateParameters()
1402  ->getDepth() == TemplateParameterDepth - 1) &&
1403  "TemplateParameterDepth should be greater than the depth of "
1404  "current template being instantiated!");
1405  ParseFunctionStatementBody(LPT.D, FnScope);
1406  Actions.UnmarkAsLateParsedTemplate(FunD);
1407  } else
1408  Actions.ActOnFinishFunctionBody(LPT.D, nullptr);
1409  }
1410 
1411  // Exit scopes.
1412  FnScope.Exit();
1414  TemplateParamScopeStack.rbegin();
1415  for (; I != TemplateParamScopeStack.rend(); ++I)
1416  delete *I;
1417 }
1418 
1419 /// \brief Lex a delayed template function for late parsing.
1420 void Parser::LexTemplateFunctionForLateParsing(CachedTokens &Toks) {
1421  tok::TokenKind kind = Tok.getKind();
1422  if (!ConsumeAndStoreFunctionPrologue(Toks)) {
1423  // Consume everything up to (and including) the matching right brace.
1424  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
1425  }
1426 
1427  // If we're in a function-try-block, we need to store all the catch blocks.
1428  if (kind == tok::kw_try) {
1429  while (Tok.is(tok::kw_catch)) {
1430  ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false);
1431  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
1432  }
1433  }
1434 }
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:168
FunctionDecl - An instance of this class is created to represent a function declaration or definition...
Definition: Decl.h:1583
SourceLocation getLocWithOffset(int Offset) const
Return a source location with the specified offset from this SourceLocation.
SourceRange getSourceRange() const LLVM_READONLY
Return the source range that covers this unqualified-id.
Definition: DeclSpec.h:1119
SourceLocation StartLocation
The location of the first token that describes this unqualified-id, which will be the location of the...
Definition: DeclSpec.h:978
IdentifierInfo * Identifier
When Kind == IK_Identifier, the parsed identifier, or when Kind == IK_UserLiteralId, the identifier suffix.
Definition: DeclSpec.h:948
bool is(tok::TokenKind K) const
is/isNot - Predicates to check if this token is a specific kind, as in "if (Tok.is(tok::l_brace)) {...
Definition: Token.h:95
The name refers to a dependent template name:
Definition: TemplateKinds.h:46
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:81
RAII object used to inform the actions that we&#39;re currently parsing a declaration.
Defines the C++ template declaration subclasses.
StringRef P
The base class of the type hierarchy.
Definition: Type.h:1303
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:94
Parser - This implements a parser for the C family of languages.
Definition: Parser.h:57
static TemplateIdAnnotation * Create(CXXScopeSpec SS, SourceLocation TemplateKWLoc, SourceLocation TemplateNameLoc, IdentifierInfo *Name, OverloadedOperatorKind OperatorKind, ParsedTemplateTy OpaqueTemplateName, TemplateNameKind TemplateKind, SourceLocation LAngleLoc, SourceLocation RAngleLoc, ArrayRef< ParsedTemplateArgument > TemplateArgs, SmallVectorImpl< TemplateIdAnnotation *> &CleanupList)
Creates a new TemplateIdAnnotation with NumArgs arguments and appends it to List. ...
RAII object that enters a new expression evaluation context.
Definition: Sema.h:10438
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:1733
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...
Stores a list of template parameters for a TemplateDecl and its derived classes.
Definition: DeclTemplate.h:50
friend class ObjCDeclContextSwitch
Definition: Parser.h:61
ColonProtectionRAIIObject - This sets the Parser::ColonIsSacred bool and restores it when destroyed...
tok::TokenKind getKind() const
Definition: Token.h:90
bool SkipUntil(tok::TokenKind T, SkipUntilFlags Flags=static_cast< SkipUntilFlags >(0))
SkipUntil - Read tokens until we get to the specified token, then consume it (unless StopBeforeMatch ...
Definition: Parser.h:933
Information about a template-id annotation token.
RecordDecl - Represents a struct/union/class.
Definition: Decl.h:3305
const Token & NextToken()
NextToken - This peeks ahead one token and returns it without consuming it.
Definition: Parser.h:601
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: Parser.h:319
One of these records is kept for each identifier that is lexed.
IdKind getKind() const
Determine what kind of name we have.
Definition: DeclSpec.h:1001
Decl * ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, unsigned Depth, unsigned Position, SourceLocation EqualLoc, Expr *DefaultArg)
OverloadedOperatorKind Operator
The kind of overloaded operator.
Definition: DeclSpec.h:931
struct OFI OperatorFunctionId
When Kind == IK_OperatorFunctionId, the overloaded operator that we parsed.
Definition: DeclSpec.h:952
CachedTokens Toks
Definition: Sema.h:10493
Token - This structure provides full information about a lexed token.
Definition: Token.h:35
A non-type template parameter, stored as an expression.
void setKind(tok::TokenKind K)
Definition: Token.h:91
Represents a C++ unqualified-id that has been parsed.
Definition: DeclSpec.h:899
PtrTy get() const
Definition: Ownership.h:163
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...
Scope - A scope is a transient data structure that is used while parsing the program.
Definition: Scope.h:39
bool IsPreviousCachedToken(const Token &Tok) const
Whether Tok is the most recent token (CachedLexPos - 1) in CachedTokens.
Definition: PPCaching.cpp:150
Represents a C++ nested-name-specifier or a global scope specifier.
Definition: DeclSpec.h:63
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:722
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...
The current context is "potentially evaluated" in C++11 terms, but the expression is evaluated at com...
unsigned getFlags() const
getFlags - Return the flags for this scope.
Definition: Scope.h:210
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:45
DeclContext * getLexicalParent()
getLexicalParent - Returns the containing lexical DeclContext.
Definition: DeclBase.h:1271
void setAnnotationValue(void *val)
Definition: Token.h:228
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:3939
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:1810
OpaquePtr< TemplateName > TemplateTy
Definition: Parser.h:283
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:124
SourceLocation getBeginLoc() const
Definition: DeclSpec.h:72
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
TemplateNameKind
Specifies the kind of template name that an identifier refers to.
Definition: TemplateKinds.h:21
void setEllipsisLoc(SourceLocation EL)
Definition: DeclSpec.h:2394
TemplateNameKind ActOnDependentTemplateName(Scope *S, CXXScopeSpec &SS, SourceLocation TemplateKWLoc, UnqualifiedId &Name, ParsedType ObjectType, bool EnteringContext, TemplateTy &Template, bool AllowInjectedClassName=false)
Form a dependent template name.
bool isInvalid() const
Definition: Ownership.h:159
TemplateNameKind isTemplateName(Scope *S, CXXScopeSpec &SS, bool hasTemplateKeyword, UnqualifiedId &Name, ParsedType ObjectType, bool EnteringContext, TemplateTy &Template, bool &MemberOfUnknownSpecialization)
bool isUsable() const
Definition: Ownership.h:160
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...
const LangOptions & getLangOpts() const
Definition: Parser.h:266
static CharSourceRange getCharRange(SourceRange R)
SourceManager & getSourceManager() const
Definition: Preprocessor.h:691
A class for parsing a DeclSpec.
Stop skipping at semicolon.
Definition: Parser.h:913
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:145
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:199
bool hasName() const
hasName - Whether this declarator has a name, which might be an identifier (accessible via getIdentif...
Definition: DeclSpec.h:2104
Encodes a location in the source.
void setLength(unsigned Len)
Definition: Token.h:133
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:177
void setAnnotationEndLoc(SourceLocation L)
Definition: Token.h:142
TokenKind
Provides a simple uniform namespace for tokens from all C languages.
Definition: TokenKinds.h:25
Scope * getCurScope() const
Definition: Parser.h:273
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.
bool isNot(tok::TokenKind K) const
Definition: Token.h:96
/file This file defines classes for searching and anlyzing source code clones.
bool isValid() const
Return true if this is a valid SourceLocation object.
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1176
OverloadedOperatorKind
Enumeration specifying the different kinds of C++ overloaded operators.
Definition: OperatorKinds.h:22
SourceRange getSourceRange(const SourceRange &Range)
Returns the SourceRange of a SourceRange.
Definition: FixIt.h:34
static FixItHint CreateRemoval(CharSourceRange RemoveRange)
Create a code modification hint that removes the given source range.
Definition: Diagnostic.h:116
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:222
bool isInvalid() const
Determine whether the given template argument is invalid.
bool isOneOf(tok::TokenKind K1, tok::TokenKind K2) const
Definition: Token.h:97
The name refers to a template whose specialization produces a type.
Definition: TemplateKinds.h:30
static const TST TST_unspecified
Definition: DeclSpec.h:272
unsigned getLength() const
Definition: Token.h:127
Not an overloaded operator.
Definition: OperatorKinds.h:23
ExprResult ParseConstantExpressionInExprEvalContext(TypeCastState isTypeCast)
Definition: ParseExpr.cpp:196
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID)
Definition: Parser.cpp:72
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:156
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:90
A template-id, e.g., f<int>.
Definition: DeclSpec.h:922
SmallVector< TemplateParameterList *, 4 > TemplateParameterLists
Definition: Parser.h:285
This is a scope that can contain a declaration.
Definition: Scope.h:58
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2120
bool isSet() const
Deprecated.
Definition: DeclSpec.h:209
TypeResult ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, TemplateTy Template, IdentifierInfo *TemplateII, SourceLocation TemplateIILoc, SourceLocation LAngleLoc, ASTTemplateArgsPtr TemplateArgs, SourceLocation RAngleLoc, bool IsCtorOrDtorName=false, bool IsClassName=false)
Captures information about "declaration specifiers".
Definition: DeclSpec.h:228
SourceLocation ConsumeToken()
ConsumeToken - Consume the current &#39;peek token&#39; and lex the next one.
Definition: Parser.h:311
SourceLocation getEllipsisLoc() const
Definition: DeclSpec.h:2393
Decl * D
The template function declaration to be late parsed.
Definition: Sema.h:10495
bool isNotEmpty() const
A scope specifier is present, but may be valid or invalid.
Definition: DeclSpec.h:191
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:127
Contains a late templated function.
Definition: Sema.h:10492
Annotates a diagnostic with some code that should be inserted, removed, or replaced to fix the proble...
Definition: Diagnostic.h:64
void setLocation(SourceLocation L)
Definition: Token.h:132
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:1008
bool isTranslationUnit() const
Definition: DeclBase.h:1325
SourceLocation getBegin() const
AttributeList - Represents a syntactic attribute.
Definition: AttributeList.h:95
Stop skipping at specified token, but don&#39;t skip the token itself.
Definition: Parser.h:915
A RAII object to temporarily push a declaration context.
Definition: Sema.h:655