clang  6.0.0svn
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<NamedDecl*, 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  auto usingDeclPtr = ParseUsingDirectiveOrDeclaration(Context, TemplateInfo, DeclEnd,
201  prefixAttrs);
202  if (!usingDeclPtr || !usingDeclPtr.get().isSingleDecl())
203  return nullptr;
204  return usingDeclPtr.get().getSingleDecl();
205  }
206 
207  // Parse the declaration specifiers, stealing any diagnostics from
208  // the template parameters.
209  ParsingDeclSpec DS(*this, &DiagsFromTParams);
210 
211  ParseDeclarationSpecifiers(DS, TemplateInfo, AS,
212  getDeclSpecContextFromDeclaratorContext(Context));
213 
214  if (Tok.is(tok::semi)) {
215  ProhibitAttributes(prefixAttrs);
216  DeclEnd = ConsumeToken();
217  RecordDecl *AnonRecord = nullptr;
219  getCurScope(), AS, DS,
220  TemplateInfo.TemplateParams ? *TemplateInfo.TemplateParams
222  TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation,
223  AnonRecord);
224  assert(!AnonRecord &&
225  "Anonymous unions/structs should not be valid with template");
226  DS.complete(Decl);
227  return Decl;
228  }
229 
230  // Move the attributes from the prefix into the DS.
231  if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation)
232  ProhibitAttributes(prefixAttrs);
233  else
234  DS.takeAttributesFrom(prefixAttrs);
235 
236  // Parse the declarator.
237  ParsingDeclarator DeclaratorInfo(*this, DS, (Declarator::TheContext)Context);
238  ParseDeclarator(DeclaratorInfo);
239  // Error parsing the declarator?
240  if (!DeclaratorInfo.hasName()) {
241  // If so, skip until the semi-colon or a }.
242  SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
243  if (Tok.is(tok::semi))
244  ConsumeToken();
245  return nullptr;
246  }
247 
248  LateParsedAttrList LateParsedAttrs(true);
249  if (DeclaratorInfo.isFunctionDeclarator())
250  MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs);
251 
252  if (DeclaratorInfo.isFunctionDeclarator() &&
253  isStartOfFunctionDefinition(DeclaratorInfo)) {
254 
255  // Function definitions are only allowed at file scope and in C++ classes.
256  // The C++ inline method definition case is handled elsewhere, so we only
257  // need to handle the file scope definition case.
258  if (Context != Declarator::FileContext) {
259  Diag(Tok, diag::err_function_definition_not_allowed);
261  return nullptr;
262  }
263 
264  if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
265  // Recover by ignoring the 'typedef'. This was probably supposed to be
266  // the 'typename' keyword, which we should have already suggested adding
267  // if it's appropriate.
268  Diag(DS.getStorageClassSpecLoc(), diag::err_function_declared_typedef)
269  << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc());
270  DS.ClearStorageClassSpecs();
271  }
272 
273  if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
274  if (DeclaratorInfo.getName().getKind() != UnqualifiedId::IK_TemplateId) {
275  // If the declarator-id is not a template-id, issue a diagnostic and
276  // recover by ignoring the 'template' keyword.
277  Diag(Tok, diag::err_template_defn_explicit_instantiation) << 0;
278  return ParseFunctionDefinition(DeclaratorInfo, ParsedTemplateInfo(),
279  &LateParsedAttrs);
280  } else {
281  SourceLocation LAngleLoc
282  = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc);
283  Diag(DeclaratorInfo.getIdentifierLoc(),
284  diag::err_explicit_instantiation_with_definition)
285  << SourceRange(TemplateInfo.TemplateLoc)
286  << FixItHint::CreateInsertion(LAngleLoc, "<>");
287 
288  // Recover as if it were an explicit specialization.
289  TemplateParameterLists FakedParamLists;
290  FakedParamLists.push_back(Actions.ActOnTemplateParameterList(
291  0, SourceLocation(), TemplateInfo.TemplateLoc, LAngleLoc, None,
292  LAngleLoc, nullptr));
293 
294  return ParseFunctionDefinition(
295  DeclaratorInfo, ParsedTemplateInfo(&FakedParamLists,
296  /*isSpecialization=*/true,
297  /*LastParamListWasEmpty=*/true),
298  &LateParsedAttrs);
299  }
300  }
301  return ParseFunctionDefinition(DeclaratorInfo, TemplateInfo,
302  &LateParsedAttrs);
303  }
304 
305  // Parse this declaration.
306  Decl *ThisDecl = ParseDeclarationAfterDeclarator(DeclaratorInfo,
307  TemplateInfo);
308 
309  if (Tok.is(tok::comma)) {
310  Diag(Tok, diag::err_multiple_template_declarators)
311  << (int)TemplateInfo.Kind;
312  SkipUntil(tok::semi);
313  return ThisDecl;
314  }
315 
316  // Eat the semi colon after the declaration.
317  ExpectAndConsumeSemi(diag::err_expected_semi_declaration);
318  if (LateParsedAttrs.size() > 0)
319  ParseLexedAttributeList(LateParsedAttrs, ThisDecl, true, false);
320  DeclaratorInfo.complete(ThisDecl);
321  return ThisDecl;
322 }
323 
324 /// ParseTemplateParameters - Parses a template-parameter-list enclosed in
325 /// angle brackets. Depth is the depth of this template-parameter-list, which
326 /// is the number of template headers directly enclosing this template header.
327 /// TemplateParams is the current list of template parameters we're building.
328 /// The template parameter we parse will be added to this list. LAngleLoc and
329 /// RAngleLoc will receive the positions of the '<' and '>', respectively,
330 /// that enclose this template parameter list.
331 ///
332 /// \returns true if an error occurred, false otherwise.
333 bool Parser::ParseTemplateParameters(
334  unsigned Depth, SmallVectorImpl<NamedDecl *> &TemplateParams,
335  SourceLocation &LAngleLoc, 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<NamedDecl*> &TemplateParams) {
374  while (1) {
375  // FIXME: ParseTemplateParameter should probably just return a NamedDecl.
376  if (Decl *TmpParam
377  = ParseTemplateParameter(Depth, TemplateParams.size())) {
378  TemplateParams.push_back(dyn_cast<NamedDecl>(TmpParam));
379  } else {
380  // If we failed to parse a template parameter, skip until we find
381  // a comma or closing brace.
382  SkipUntil(tok::comma, tok::greater, tok::greatergreater,
384  }
385 
386  // Did we find a comma or the end of the template parameter list?
387  if (Tok.is(tok::comma)) {
388  ConsumeToken();
389  } else if (Tok.isOneOf(tok::greater, tok::greatergreater)) {
390  // Don't consume this... that's done by template parser.
391  break;
392  } else {
393  // Somebody probably forgot to close the template. Skip ahead and
394  // try to get out of the expression. This error is currently
395  // subsumed by whatever goes on in ParseTemplateParameter.
396  Diag(Tok.getLocation(), diag::err_expected_comma_greater);
397  SkipUntil(tok::comma, tok::greater, tok::greatergreater,
399  return false;
400  }
401  }
402  return true;
403 }
404 
405 /// \brief Determine whether the parser is at the start of a template
406 /// type parameter.
407 bool Parser::isStartOfTemplateTypeParameter() {
408  if (Tok.is(tok::kw_class)) {
409  // "class" may be the start of an elaborated-type-specifier or a
410  // type-parameter. Per C++ [temp.param]p3, we prefer the type-parameter.
411  switch (NextToken().getKind()) {
412  case tok::equal:
413  case tok::comma:
414  case tok::greater:
415  case tok::greatergreater:
416  case tok::ellipsis:
417  return true;
418 
419  case tok::identifier:
420  // This may be either a type-parameter or an elaborated-type-specifier.
421  // We have to look further.
422  break;
423 
424  default:
425  return false;
426  }
427 
428  switch (GetLookAheadToken(2).getKind()) {
429  case tok::equal:
430  case tok::comma:
431  case tok::greater:
432  case tok::greatergreater:
433  return true;
434 
435  default:
436  return false;
437  }
438  }
439 
440  if (Tok.isNot(tok::kw_typename))
441  return false;
442 
443  // C++ [temp.param]p2:
444  // There is no semantic difference between class and typename in a
445  // template-parameter. typename followed by an unqualified-id
446  // names a template type parameter. typename followed by a
447  // qualified-id denotes the type in a non-type
448  // parameter-declaration.
449  Token Next = NextToken();
450 
451  // If we have an identifier, skip over it.
452  if (Next.getKind() == tok::identifier)
453  Next = GetLookAheadToken(2);
454 
455  switch (Next.getKind()) {
456  case tok::equal:
457  case tok::comma:
458  case tok::greater:
459  case tok::greatergreater:
460  case tok::ellipsis:
461  return true;
462 
463  default:
464  return false;
465  }
466 }
467 
468 /// ParseTemplateParameter - Parse a template-parameter (C++ [temp.param]).
469 ///
470 /// template-parameter: [C++ temp.param]
471 /// type-parameter
472 /// parameter-declaration
473 ///
474 /// type-parameter: (see below)
475 /// 'class' ...[opt] identifier[opt]
476 /// 'class' identifier[opt] '=' type-id
477 /// 'typename' ...[opt] identifier[opt]
478 /// 'typename' identifier[opt] '=' type-id
479 /// 'template' '<' template-parameter-list '>'
480 /// 'class' ...[opt] identifier[opt]
481 /// 'template' '<' template-parameter-list '>' 'class' identifier[opt]
482 /// = id-expression
483 Decl *Parser::ParseTemplateParameter(unsigned Depth, unsigned Position) {
484  if (isStartOfTemplateTypeParameter())
485  return ParseTypeParameter(Depth, Position);
486 
487  if (Tok.is(tok::kw_template))
488  return ParseTemplateTemplateParameter(Depth, Position);
489 
490  // If it's none of the above, then it must be a parameter declaration.
491  // NOTE: This will pick up errors in the closure of the template parameter
492  // list (e.g., template < ; Check here to implement >> style closures.
493  return ParseNonTypeTemplateParameter(Depth, Position);
494 }
495 
496 /// ParseTypeParameter - Parse a template type parameter (C++ [temp.param]).
497 /// Other kinds of template parameters are parsed in
498 /// ParseTemplateTemplateParameter and ParseNonTypeTemplateParameter.
499 ///
500 /// type-parameter: [C++ temp.param]
501 /// 'class' ...[opt][C++0x] identifier[opt]
502 /// 'class' identifier[opt] '=' type-id
503 /// 'typename' ...[opt][C++0x] identifier[opt]
504 /// 'typename' identifier[opt] '=' type-id
505 Decl *Parser::ParseTypeParameter(unsigned Depth, unsigned Position) {
506  assert(Tok.isOneOf(tok::kw_class, tok::kw_typename) &&
507  "A type-parameter starts with 'class' or 'typename'");
508 
509  // Consume the 'class' or 'typename' keyword.
510  bool TypenameKeyword = Tok.is(tok::kw_typename);
511  SourceLocation KeyLoc = ConsumeToken();
512 
513  // Grab the ellipsis (if given).
514  SourceLocation EllipsisLoc;
515  if (TryConsumeToken(tok::ellipsis, EllipsisLoc)) {
516  Diag(EllipsisLoc,
518  ? diag::warn_cxx98_compat_variadic_templates
519  : diag::ext_variadic_templates);
520  }
521 
522  // Grab the template parameter name (if given)
523  SourceLocation NameLoc;
524  IdentifierInfo *ParamName = nullptr;
525  if (Tok.is(tok::identifier)) {
526  ParamName = Tok.getIdentifierInfo();
527  NameLoc = ConsumeToken();
528  } else if (Tok.isOneOf(tok::equal, tok::comma, tok::greater,
529  tok::greatergreater)) {
530  // Unnamed template parameter. Don't have to do anything here, just
531  // don't consume this token.
532  } else {
533  Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
534  return nullptr;
535  }
536 
537  // Recover from misplaced ellipsis.
538  bool AlreadyHasEllipsis = EllipsisLoc.isValid();
539  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
540  DiagnoseMisplacedEllipsis(EllipsisLoc, NameLoc, AlreadyHasEllipsis, true);
541 
542  // Grab a default argument (if available).
543  // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before
544  // we introduce the type parameter into the local scope.
545  SourceLocation EqualLoc;
546  ParsedType DefaultArg;
547  if (TryConsumeToken(tok::equal, EqualLoc))
548  DefaultArg = ParseTypeName(/*Range=*/nullptr,
550 
551  return Actions.ActOnTypeParameter(getCurScope(), TypenameKeyword, EllipsisLoc,
552  KeyLoc, ParamName, NameLoc, Depth, Position,
553  EqualLoc, DefaultArg);
554 }
555 
556 /// ParseTemplateTemplateParameter - Handle the parsing of template
557 /// template parameters.
558 ///
559 /// type-parameter: [C++ temp.param]
560 /// 'template' '<' template-parameter-list '>' type-parameter-key
561 /// ...[opt] identifier[opt]
562 /// 'template' '<' template-parameter-list '>' type-parameter-key
563 /// identifier[opt] = id-expression
564 /// type-parameter-key:
565 /// 'class'
566 /// 'typename' [C++1z]
567 Decl *
568 Parser::ParseTemplateTemplateParameter(unsigned Depth, unsigned Position) {
569  assert(Tok.is(tok::kw_template) && "Expected 'template' keyword");
570 
571  // Handle the template <...> part.
572  SourceLocation TemplateLoc = ConsumeToken();
573  SmallVector<NamedDecl*,8> TemplateParams;
574  SourceLocation LAngleLoc, RAngleLoc;
575  {
576  ParseScope TemplateParmScope(this, Scope::TemplateParamScope);
577  if (ParseTemplateParameters(Depth + 1, TemplateParams, LAngleLoc,
578  RAngleLoc)) {
579  return nullptr;
580  }
581  }
582 
583  // Provide an ExtWarn if the C++1z feature of using 'typename' here is used.
584  // Generate a meaningful error if the user forgot to put class before the
585  // identifier, comma, or greater. Provide a fixit if the identifier, comma,
586  // or greater appear immediately or after 'struct'. In the latter case,
587  // replace the keyword with 'class'.
588  if (!TryConsumeToken(tok::kw_class)) {
589  bool Replace = Tok.isOneOf(tok::kw_typename, tok::kw_struct);
590  const Token &Next = Tok.is(tok::kw_struct) ? NextToken() : Tok;
591  if (Tok.is(tok::kw_typename)) {
592  Diag(Tok.getLocation(),
593  getLangOpts().CPlusPlus17
594  ? diag::warn_cxx14_compat_template_template_param_typename
595  : diag::ext_template_template_param_typename)
596  << (!getLangOpts().CPlusPlus17
597  ? FixItHint::CreateReplacement(Tok.getLocation(), "class")
598  : FixItHint());
599  } else if (Next.isOneOf(tok::identifier, tok::comma, tok::greater,
600  tok::greatergreater, tok::ellipsis)) {
601  Diag(Tok.getLocation(), diag::err_class_on_template_template_param)
602  << (Replace ? FixItHint::CreateReplacement(Tok.getLocation(), "class")
603  : FixItHint::CreateInsertion(Tok.getLocation(), "class "));
604  } else
605  Diag(Tok.getLocation(), diag::err_class_on_template_template_param);
606 
607  if (Replace)
608  ConsumeToken();
609  }
610 
611  // Parse the ellipsis, if given.
612  SourceLocation EllipsisLoc;
613  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
614  Diag(EllipsisLoc,
616  ? diag::warn_cxx98_compat_variadic_templates
617  : diag::ext_variadic_templates);
618 
619  // Get the identifier, if given.
620  SourceLocation NameLoc;
621  IdentifierInfo *ParamName = nullptr;
622  if (Tok.is(tok::identifier)) {
623  ParamName = Tok.getIdentifierInfo();
624  NameLoc = ConsumeToken();
625  } else if (Tok.isOneOf(tok::equal, tok::comma, tok::greater,
626  tok::greatergreater)) {
627  // Unnamed template parameter. Don't have to do anything here, just
628  // don't consume this token.
629  } else {
630  Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
631  return nullptr;
632  }
633 
634  // Recover from misplaced ellipsis.
635  bool AlreadyHasEllipsis = EllipsisLoc.isValid();
636  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
637  DiagnoseMisplacedEllipsis(EllipsisLoc, NameLoc, AlreadyHasEllipsis, true);
638 
639  TemplateParameterList *ParamList =
641  TemplateLoc, LAngleLoc,
642  TemplateParams,
643  RAngleLoc, nullptr);
644 
645  // Grab a default argument (if available).
646  // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before
647  // we introduce the template parameter into the local scope.
648  SourceLocation EqualLoc;
649  ParsedTemplateArgument DefaultArg;
650  if (TryConsumeToken(tok::equal, EqualLoc)) {
651  DefaultArg = ParseTemplateTemplateArgument();
652  if (DefaultArg.isInvalid()) {
653  Diag(Tok.getLocation(),
654  diag::err_default_template_template_parameter_not_template);
655  SkipUntil(tok::comma, tok::greater, tok::greatergreater,
657  }
658  }
659 
660  return Actions.ActOnTemplateTemplateParameter(getCurScope(), TemplateLoc,
661  ParamList, EllipsisLoc,
662  ParamName, NameLoc, Depth,
663  Position, EqualLoc, DefaultArg);
664 }
665 
666 /// ParseNonTypeTemplateParameter - Handle the parsing of non-type
667 /// template parameters (e.g., in "template<int Size> class array;").
668 ///
669 /// template-parameter:
670 /// ...
671 /// parameter-declaration
672 Decl *
673 Parser::ParseNonTypeTemplateParameter(unsigned Depth, unsigned Position) {
674  // Parse the declaration-specifiers (i.e., the type).
675  // FIXME: The type should probably be restricted in some way... Not all
676  // declarators (parts of declarators?) are accepted for parameters.
677  DeclSpec DS(AttrFactory);
678  ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS_none,
679  DSC_template_param);
680 
681  // Parse this as a typename.
683  ParseDeclarator(ParamDecl);
684  if (DS.getTypeSpecType() == DeclSpec::TST_unspecified) {
685  Diag(Tok.getLocation(), diag::err_expected_template_parameter);
686  return nullptr;
687  }
688 
689  // Recover from misplaced ellipsis.
690  SourceLocation EllipsisLoc;
691  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
692  DiagnoseMisplacedEllipsisInDeclarator(EllipsisLoc, ParamDecl);
693 
694  // If there is a default value, parse it.
695  // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before
696  // we introduce the template parameter into the local scope.
697  SourceLocation EqualLoc;
698  ExprResult DefaultArg;
699  if (TryConsumeToken(tok::equal, EqualLoc)) {
700  // C++ [temp.param]p15:
701  // When parsing a default template-argument for a non-type
702  // template-parameter, the first non-nested > is taken as the
703  // end of the template-parameter-list rather than a greater-than
704  // operator.
705  GreaterThanIsOperatorScope G(GreaterThanIsOperator, false);
706  EnterExpressionEvaluationContext ConstantEvaluated(
708 
710  if (DefaultArg.isInvalid())
711  SkipUntil(tok::comma, tok::greater, StopAtSemi | StopBeforeMatch);
712  }
713 
714  // Create the parameter.
715  return Actions.ActOnNonTypeTemplateParameter(getCurScope(), ParamDecl,
716  Depth, Position, EqualLoc,
717  DefaultArg.get());
718 }
719 
720 void Parser::DiagnoseMisplacedEllipsis(SourceLocation EllipsisLoc,
721  SourceLocation CorrectLoc,
722  bool AlreadyHasEllipsis,
723  bool IdentifierHasName) {
724  FixItHint Insertion;
725  if (!AlreadyHasEllipsis)
726  Insertion = FixItHint::CreateInsertion(CorrectLoc, "...");
727  Diag(EllipsisLoc, diag::err_misplaced_ellipsis_in_declaration)
728  << FixItHint::CreateRemoval(EllipsisLoc) << Insertion
729  << !IdentifierHasName;
730 }
731 
732 void Parser::DiagnoseMisplacedEllipsisInDeclarator(SourceLocation EllipsisLoc,
733  Declarator &D) {
734  assert(EllipsisLoc.isValid());
735  bool AlreadyHasEllipsis = D.getEllipsisLoc().isValid();
736  if (!AlreadyHasEllipsis)
737  D.setEllipsisLoc(EllipsisLoc);
738  DiagnoseMisplacedEllipsis(EllipsisLoc, D.getIdentifierLoc(),
739  AlreadyHasEllipsis, D.hasName());
740 }
741 
742 /// \brief Parses a '>' at the end of a template list.
743 ///
744 /// If this function encounters '>>', '>>>', '>=', or '>>=', it tries
745 /// to determine if these tokens were supposed to be a '>' followed by
746 /// '>', '>>', '>=', or '>='. It emits an appropriate diagnostic if necessary.
747 ///
748 /// \param RAngleLoc the location of the consumed '>'.
749 ///
750 /// \param ConsumeLastToken if true, the '>' is consumed.
751 ///
752 /// \param ObjCGenericList if true, this is the '>' closing an Objective-C
753 /// type parameter or type argument list, rather than a C++ template parameter
754 /// or argument list.
755 ///
756 /// \returns true, if current token does not start with '>', false otherwise.
757 bool Parser::ParseGreaterThanInTemplateList(SourceLocation &RAngleLoc,
758  bool ConsumeLastToken,
759  bool ObjCGenericList) {
760  // What will be left once we've consumed the '>'.
761  tok::TokenKind RemainingToken;
762  const char *ReplacementStr = "> >";
763 
764  switch (Tok.getKind()) {
765  default:
766  Diag(Tok.getLocation(), diag::err_expected) << tok::greater;
767  return true;
768 
769  case tok::greater:
770  // Determine the location of the '>' token. Only consume this token
771  // if the caller asked us to.
772  RAngleLoc = Tok.getLocation();
773  if (ConsumeLastToken)
774  ConsumeToken();
775  return false;
776 
777  case tok::greatergreater:
778  RemainingToken = tok::greater;
779  break;
780 
781  case tok::greatergreatergreater:
782  RemainingToken = tok::greatergreater;
783  break;
784 
785  case tok::greaterequal:
786  RemainingToken = tok::equal;
787  ReplacementStr = "> =";
788  break;
789 
790  case tok::greatergreaterequal:
791  RemainingToken = tok::greaterequal;
792  break;
793  }
794 
795  // This template-id is terminated by a token which starts with a '>'. Outside
796  // C++11, this is now error recovery, and in C++11, this is error recovery if
797  // the token isn't '>>' or '>>>'.
798  // '>>>' is for CUDA, where this sequence of characters is parsed into
799  // tok::greatergreatergreater, rather than two separate tokens.
800  //
801  // We always allow this for Objective-C type parameter and type argument
802  // lists.
803  RAngleLoc = Tok.getLocation();
804  Token Next = NextToken();
805  if (!ObjCGenericList) {
806  // The source range of the '>>' or '>=' at the start of the token.
807  CharSourceRange ReplacementRange =
810  getLangOpts()));
811 
812  // A hint to put a space between the '>>'s. In order to make the hint as
813  // clear as possible, we include the characters either side of the space in
814  // the replacement, rather than just inserting a space at SecondCharLoc.
815  FixItHint Hint1 = FixItHint::CreateReplacement(ReplacementRange,
816  ReplacementStr);
817 
818  // A hint to put another space after the token, if it would otherwise be
819  // lexed differently.
820  FixItHint Hint2;
821  if ((RemainingToken == tok::greater ||
822  RemainingToken == tok::greatergreater) &&
823  (Next.isOneOf(tok::greater, tok::greatergreater,
824  tok::greatergreatergreater, tok::equal,
825  tok::greaterequal, tok::greatergreaterequal,
826  tok::equalequal)) &&
827  areTokensAdjacent(Tok, Next))
828  Hint2 = FixItHint::CreateInsertion(Next.getLocation(), " ");
829 
830  unsigned DiagId = diag::err_two_right_angle_brackets_need_space;
831  if (getLangOpts().CPlusPlus11 &&
832  (Tok.is(tok::greatergreater) || Tok.is(tok::greatergreatergreater)))
833  DiagId = diag::warn_cxx98_compat_two_right_angle_brackets;
834  else if (Tok.is(tok::greaterequal))
835  DiagId = diag::err_right_angle_bracket_equal_needs_space;
836  Diag(Tok.getLocation(), DiagId) << Hint1 << Hint2;
837  }
838 
839  // Strip the initial '>' from the token.
840  Token PrevTok = Tok;
841  if (RemainingToken == tok::equal && Next.is(tok::equal) &&
842  areTokensAdjacent(Tok, Next)) {
843  // Join two adjacent '=' tokens into one, for cases like:
844  // void (*p)() = f<int>;
845  // return f<int>==p;
846  ConsumeToken();
847  Tok.setKind(tok::equalequal);
848  Tok.setLength(Tok.getLength() + 1);
849  } else {
850  Tok.setKind(RemainingToken);
851  Tok.setLength(Tok.getLength() - 1);
852  }
854  PP.getSourceManager(),
855  getLangOpts()));
856 
857  // The advance from '>>' to '>' in a ObjectiveC template argument list needs
858  // to be properly reflected in the token cache to allow correct interaction
859  // between annotation and backtracking.
860  if (ObjCGenericList && PrevTok.getKind() == tok::greatergreater &&
861  RemainingToken == tok::greater && PP.IsPreviousCachedToken(PrevTok)) {
862  PrevTok.setKind(RemainingToken);
863  PrevTok.setLength(1);
864  // Break tok::greatergreater into two tok::greater but only add the second
865  // one in case the client asks to consume the last token.
866  if (ConsumeLastToken)
867  PP.ReplacePreviousCachedToken({PrevTok, Tok});
868  else
869  PP.ReplacePreviousCachedToken({PrevTok});
870  }
871 
872  if (!ConsumeLastToken) {
873  // Since we're not supposed to consume the '>' token, we need to push
874  // this token and revert the current token back to the '>'.
875  PP.EnterToken(Tok);
876  Tok.setKind(tok::greater);
877  Tok.setLength(1);
878  Tok.setLocation(RAngleLoc);
879  }
880  return false;
881 }
882 
883 
884 /// \brief Parses a template-id that after the template name has
885 /// already been parsed.
886 ///
887 /// This routine takes care of parsing the enclosed template argument
888 /// list ('<' template-parameter-list [opt] '>') and placing the
889 /// results into a form that can be transferred to semantic analysis.
890 ///
891 /// \param ConsumeLastToken if true, then we will consume the last
892 /// token that forms the template-id. Otherwise, we will leave the
893 /// last token in the stream (e.g., so that it can be replaced with an
894 /// annotation token).
895 bool
896 Parser::ParseTemplateIdAfterTemplateName(bool ConsumeLastToken,
897  SourceLocation &LAngleLoc,
898  TemplateArgList &TemplateArgs,
899  SourceLocation &RAngleLoc) {
900  assert(Tok.is(tok::less) && "Must have already parsed the template-name");
901 
902  // Consume the '<'.
903  LAngleLoc = ConsumeToken();
904 
905  // Parse the optional template-argument-list.
906  bool Invalid = false;
907  {
908  GreaterThanIsOperatorScope G(GreaterThanIsOperator, false);
909  if (Tok.isNot(tok::greater) && Tok.isNot(tok::greatergreater))
910  Invalid = ParseTemplateArgumentList(TemplateArgs);
911 
912  if (Invalid) {
913  // Try to find the closing '>'.
914  if (ConsumeLastToken)
915  SkipUntil(tok::greater, StopAtSemi);
916  else
917  SkipUntil(tok::greater, StopAtSemi | StopBeforeMatch);
918  return true;
919  }
920  }
921 
922  return ParseGreaterThanInTemplateList(RAngleLoc, ConsumeLastToken,
923  /*ObjCGenericList=*/false);
924 }
925 
926 /// \brief Replace the tokens that form a simple-template-id with an
927 /// annotation token containing the complete template-id.
928 ///
929 /// The first token in the stream must be the name of a template that
930 /// is followed by a '<'. This routine will parse the complete
931 /// simple-template-id and replace the tokens with a single annotation
932 /// token with one of two different kinds: if the template-id names a
933 /// type (and \p AllowTypeAnnotation is true), the annotation token is
934 /// a type annotation that includes the optional nested-name-specifier
935 /// (\p SS). Otherwise, the annotation token is a template-id
936 /// annotation that does not include the optional
937 /// nested-name-specifier.
938 ///
939 /// \param Template the declaration of the template named by the first
940 /// token (an identifier), as returned from \c Action::isTemplateName().
941 ///
942 /// \param TNK the kind of template that \p Template
943 /// refers to, as returned from \c Action::isTemplateName().
944 ///
945 /// \param SS if non-NULL, the nested-name-specifier that precedes
946 /// this template name.
947 ///
948 /// \param TemplateKWLoc if valid, specifies that this template-id
949 /// annotation was preceded by the 'template' keyword and gives the
950 /// location of that keyword. If invalid (the default), then this
951 /// template-id was not preceded by a 'template' keyword.
952 ///
953 /// \param AllowTypeAnnotation if true (the default), then a
954 /// simple-template-id that refers to a class template, template
955 /// template parameter, or other template that produces a type will be
956 /// replaced with a type annotation token. Otherwise, the
957 /// simple-template-id is always replaced with a template-id
958 /// annotation token.
959 ///
960 /// If an unrecoverable parse error occurs and no annotation token can be
961 /// formed, this function returns true.
962 ///
963 bool Parser::AnnotateTemplateIdToken(TemplateTy Template, TemplateNameKind TNK,
964  CXXScopeSpec &SS,
965  SourceLocation TemplateKWLoc,
967  bool AllowTypeAnnotation) {
968  assert(getLangOpts().CPlusPlus && "Can only annotate template-ids in C++");
969  assert(Template && Tok.is(tok::less) &&
970  "Parser isn't at the beginning of a template-id");
971 
972  // Consume the template-name.
973  SourceLocation TemplateNameLoc = TemplateName.getSourceRange().getBegin();
974 
975  // Parse the enclosed template argument list.
976  SourceLocation LAngleLoc, RAngleLoc;
977  TemplateArgList TemplateArgs;
978  bool Invalid = ParseTemplateIdAfterTemplateName(false, LAngleLoc,
979  TemplateArgs,
980  RAngleLoc);
981 
982  if (Invalid) {
983  // If we failed to parse the template ID but skipped ahead to a >, we're not
984  // going to be able to form a token annotation. Eat the '>' if present.
985  TryConsumeToken(tok::greater);
986  return true;
987  }
988 
989  ASTTemplateArgsPtr TemplateArgsPtr(TemplateArgs);
990 
991  // Build the annotation token.
992  if (TNK == TNK_Type_template && AllowTypeAnnotation) {
994  SS, TemplateKWLoc, Template, TemplateName.Identifier,
995  TemplateNameLoc, LAngleLoc, TemplateArgsPtr, RAngleLoc);
996  if (Type.isInvalid()) {
997  // If we failed to parse the template ID but skipped ahead to a >, we're
998  // not going to be able to form a token annotation. Eat the '>' if
999  // present.
1000  TryConsumeToken(tok::greater);
1001  return true;
1002  }
1003 
1004  Tok.setKind(tok::annot_typename);
1005  setTypeAnnotation(Tok, Type.get());
1006  if (SS.isNotEmpty())
1007  Tok.setLocation(SS.getBeginLoc());
1008  else if (TemplateKWLoc.isValid())
1009  Tok.setLocation(TemplateKWLoc);
1010  else
1011  Tok.setLocation(TemplateNameLoc);
1012  } else {
1013  // Build a template-id annotation token that can be processed
1014  // later.
1015  Tok.setKind(tok::annot_template_id);
1016 
1017  IdentifierInfo *TemplateII =
1018  TemplateName.getKind() == UnqualifiedId::IK_Identifier
1019  ? TemplateName.Identifier
1020  : nullptr;
1021 
1022  OverloadedOperatorKind OpKind =
1023  TemplateName.getKind() == UnqualifiedId::IK_Identifier
1024  ? OO_None
1025  : TemplateName.OperatorFunctionId.Operator;
1026 
1028  SS, TemplateKWLoc, TemplateNameLoc, TemplateII, OpKind, Template, TNK,
1029  LAngleLoc, RAngleLoc, TemplateArgs, TemplateIds);
1030 
1031  Tok.setAnnotationValue(TemplateId);
1032  if (TemplateKWLoc.isValid())
1033  Tok.setLocation(TemplateKWLoc);
1034  else
1035  Tok.setLocation(TemplateNameLoc);
1036  }
1037 
1038  // Common fields for the annotation token
1039  Tok.setAnnotationEndLoc(RAngleLoc);
1040 
1041  // In case the tokens were cached, have Preprocessor replace them with the
1042  // annotation token.
1043  PP.AnnotateCachedTokens(Tok);
1044  return false;
1045 }
1046 
1047 /// \brief Replaces a template-id annotation token with a type
1048 /// annotation token.
1049 ///
1050 /// If there was a failure when forming the type from the template-id,
1051 /// a type annotation token will still be created, but will have a
1052 /// NULL type pointer to signify an error.
1053 ///
1054 /// \param IsClassName Is this template-id appearing in a context where we
1055 /// know it names a class, such as in an elaborated-type-specifier or
1056 /// base-specifier? ('typename' and 'template' are unneeded and disallowed
1057 /// in those contexts.)
1058 void Parser::AnnotateTemplateIdTokenAsType(bool IsClassName) {
1059  assert(Tok.is(tok::annot_template_id) && "Requires template-id tokens");
1060 
1061  TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
1062  assert((TemplateId->Kind == TNK_Type_template ||
1063  TemplateId->Kind == TNK_Dependent_template_name) &&
1064  "Only works for type and dependent templates");
1065 
1066  ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
1067  TemplateId->NumArgs);
1068 
1069  TypeResult Type
1070  = Actions.ActOnTemplateIdType(TemplateId->SS,
1071  TemplateId->TemplateKWLoc,
1072  TemplateId->Template,
1073  TemplateId->Name,
1074  TemplateId->TemplateNameLoc,
1075  TemplateId->LAngleLoc,
1076  TemplateArgsPtr,
1077  TemplateId->RAngleLoc,
1078  /*IsCtorOrDtorName*/false,
1079  IsClassName);
1080  // Create the new "type" annotation token.
1081  Tok.setKind(tok::annot_typename);
1082  setTypeAnnotation(Tok, Type.isInvalid() ? nullptr : Type.get());
1083  if (TemplateId->SS.isNotEmpty()) // it was a C++ qualified type name.
1084  Tok.setLocation(TemplateId->SS.getBeginLoc());
1085  // End location stays the same
1086 
1087  // Replace the template-id annotation token, and possible the scope-specifier
1088  // that precedes it, with the typename annotation token.
1089  PP.AnnotateCachedTokens(Tok);
1090 }
1091 
1092 /// \brief Determine whether the given token can end a template argument.
1093 static bool isEndOfTemplateArgument(Token Tok) {
1094  return Tok.isOneOf(tok::comma, tok::greater, tok::greatergreater);
1095 }
1096 
1097 /// \brief Parse a C++ template template argument.
1098 ParsedTemplateArgument Parser::ParseTemplateTemplateArgument() {
1099  if (!Tok.is(tok::identifier) && !Tok.is(tok::coloncolon) &&
1100  !Tok.is(tok::annot_cxxscope))
1101  return ParsedTemplateArgument();
1102 
1103  // C++0x [temp.arg.template]p1:
1104  // A template-argument for a template template-parameter shall be the name
1105  // of a class template or an alias template, expressed as id-expression.
1106  //
1107  // We parse an id-expression that refers to a class template or alias
1108  // template. The grammar we parse is:
1109  //
1110  // nested-name-specifier[opt] template[opt] identifier ...[opt]
1111  //
1112  // followed by a token that terminates a template argument, such as ',',
1113  // '>', or (in some cases) '>>'.
1114  CXXScopeSpec SS; // nested-name-specifier, if present
1115  ParseOptionalCXXScopeSpecifier(SS, nullptr,
1116  /*EnteringContext=*/false);
1117 
1119  SourceLocation EllipsisLoc;
1120  if (SS.isSet() && Tok.is(tok::kw_template)) {
1121  // Parse the optional 'template' keyword following the
1122  // nested-name-specifier.
1123  SourceLocation TemplateKWLoc = ConsumeToken();
1124 
1125  if (Tok.is(tok::identifier)) {
1126  // We appear to have a dependent template name.
1127  UnqualifiedId Name;
1128  Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1129  ConsumeToken(); // the identifier
1130 
1131  TryConsumeToken(tok::ellipsis, EllipsisLoc);
1132 
1133  // If the next token signals the end of a template argument,
1134  // then we have a dependent template name that could be a template
1135  // template argument.
1136  TemplateTy Template;
1137  if (isEndOfTemplateArgument(Tok) &&
1139  getCurScope(), SS, TemplateKWLoc, Name,
1140  /*ObjectType=*/nullptr,
1141  /*EnteringContext=*/false, Template))
1142  Result = ParsedTemplateArgument(SS, Template, Name.StartLocation);
1143  }
1144  } else if (Tok.is(tok::identifier)) {
1145  // We may have a (non-dependent) template name.
1146  TemplateTy Template;
1147  UnqualifiedId Name;
1148  Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1149  ConsumeToken(); // the identifier
1150 
1151  TryConsumeToken(tok::ellipsis, EllipsisLoc);
1152 
1153  if (isEndOfTemplateArgument(Tok)) {
1154  bool MemberOfUnknownSpecialization;
1155  TemplateNameKind TNK = Actions.isTemplateName(
1156  getCurScope(), SS,
1157  /*hasTemplateKeyword=*/false, Name,
1158  /*ObjectType=*/nullptr,
1159  /*EnteringContext=*/false, Template, MemberOfUnknownSpecialization);
1160  if (TNK == TNK_Dependent_template_name || TNK == TNK_Type_template) {
1161  // We have an id-expression that refers to a class template or
1162  // (C++0x) alias template.
1163  Result = ParsedTemplateArgument(SS, Template, Name.StartLocation);
1164  }
1165  }
1166  }
1167 
1168  // If this is a pack expansion, build it as such.
1169  if (EllipsisLoc.isValid() && !Result.isInvalid())
1170  Result = Actions.ActOnPackExpansion(Result, EllipsisLoc);
1171 
1172  return Result;
1173 }
1174 
1175 /// ParseTemplateArgument - Parse a C++ template argument (C++ [temp.names]).
1176 ///
1177 /// template-argument: [C++ 14.2]
1178 /// constant-expression
1179 /// type-id
1180 /// id-expression
1181 ParsedTemplateArgument Parser::ParseTemplateArgument() {
1182  // C++ [temp.arg]p2:
1183  // In a template-argument, an ambiguity between a type-id and an
1184  // expression is resolved to a type-id, regardless of the form of
1185  // the corresponding template-parameter.
1186  //
1187  // Therefore, we initially try to parse a type-id - and isCXXTypeId might look
1188  // up and annotate an identifier as an id-expression during disambiguation,
1189  // so enter the appropriate context for a constant expression template
1190  // argument before trying to disambiguate.
1191 
1192  EnterExpressionEvaluationContext EnterConstantEvaluated(
1194  if (isCXXTypeId(TypeIdAsTemplateArgument)) {
1195  SourceLocation Loc = Tok.getLocation();
1196  TypeResult TypeArg = ParseTypeName(/*Range=*/nullptr,
1198  if (TypeArg.isInvalid())
1199  return ParsedTemplateArgument();
1200 
1202  TypeArg.get().getAsOpaquePtr(),
1203  Loc);
1204  }
1205 
1206  // Try to parse a template template argument.
1207  {
1208  TentativeParsingAction TPA(*this);
1209 
1210  ParsedTemplateArgument TemplateTemplateArgument
1211  = ParseTemplateTemplateArgument();
1212  if (!TemplateTemplateArgument.isInvalid()) {
1213  TPA.Commit();
1214  return TemplateTemplateArgument;
1215  }
1216 
1217  // Revert this tentative parse to parse a non-type template argument.
1218  TPA.Revert();
1219  }
1220 
1221  // Parse a non-type template argument.
1222  SourceLocation Loc = Tok.getLocation();
1224  if (ExprArg.isInvalid() || !ExprArg.get())
1225  return ParsedTemplateArgument();
1226 
1228  ExprArg.get(), Loc);
1229 }
1230 
1231 /// \brief Determine whether the current tokens can only be parsed as a
1232 /// template argument list (starting with the '<') and never as a '<'
1233 /// expression.
1234 bool Parser::IsTemplateArgumentList(unsigned Skip) {
1235  struct AlwaysRevertAction : TentativeParsingAction {
1236  AlwaysRevertAction(Parser &P) : TentativeParsingAction(P) { }
1237  ~AlwaysRevertAction() { Revert(); }
1238  } Tentative(*this);
1239 
1240  while (Skip) {
1241  ConsumeAnyToken();
1242  --Skip;
1243  }
1244 
1245  // '<'
1246  if (!TryConsumeToken(tok::less))
1247  return false;
1248 
1249  // An empty template argument list.
1250  if (Tok.is(tok::greater))
1251  return true;
1252 
1253  // See whether we have declaration specifiers, which indicate a type.
1254  while (isCXXDeclarationSpecifier() == TPResult::True)
1255  ConsumeAnyToken();
1256 
1257  // If we have a '>' or a ',' then this is a template argument list.
1258  return Tok.isOneOf(tok::greater, tok::comma);
1259 }
1260 
1261 /// ParseTemplateArgumentList - Parse a C++ template-argument-list
1262 /// (C++ [temp.names]). Returns true if there was an error.
1263 ///
1264 /// template-argument-list: [C++ 14.2]
1265 /// template-argument
1266 /// template-argument-list ',' template-argument
1267 bool
1268 Parser::ParseTemplateArgumentList(TemplateArgList &TemplateArgs) {
1269 
1270  ColonProtectionRAIIObject ColonProtection(*this, false);
1271 
1272  do {
1273  ParsedTemplateArgument Arg = ParseTemplateArgument();
1274  SourceLocation EllipsisLoc;
1275  if (TryConsumeToken(tok::ellipsis, EllipsisLoc))
1276  Arg = Actions.ActOnPackExpansion(Arg, EllipsisLoc);
1277 
1278  if (Arg.isInvalid()) {
1279  SkipUntil(tok::comma, tok::greater, StopAtSemi | StopBeforeMatch);
1280  return true;
1281  }
1282 
1283  // Save this template argument.
1284  TemplateArgs.push_back(Arg);
1285 
1286  // If the next token is a comma, consume it and keep reading
1287  // arguments.
1288  } while (TryConsumeToken(tok::comma));
1289 
1290  return false;
1291 }
1292 
1293 /// \brief Parse a C++ explicit template instantiation
1294 /// (C++ [temp.explicit]).
1295 ///
1296 /// explicit-instantiation:
1297 /// 'extern' [opt] 'template' declaration
1298 ///
1299 /// Note that the 'extern' is a GNU extension and C++11 feature.
1300 Decl *Parser::ParseExplicitInstantiation(unsigned Context,
1301  SourceLocation ExternLoc,
1302  SourceLocation TemplateLoc,
1303  SourceLocation &DeclEnd,
1304  AccessSpecifier AS) {
1305  // This isn't really required here.
1307  ParsingTemplateParams(*this, ParsingDeclRAIIObject::NoParent);
1308 
1309  return ParseSingleDeclarationAfterTemplate(Context,
1310  ParsedTemplateInfo(ExternLoc,
1311  TemplateLoc),
1312  ParsingTemplateParams,
1313  DeclEnd, AS);
1314 }
1315 
1317  if (TemplateParams)
1318  return getTemplateParamsRange(TemplateParams->data(),
1319  TemplateParams->size());
1320 
1321  SourceRange R(TemplateLoc);
1322  if (ExternLoc.isValid())
1323  R.setBegin(ExternLoc);
1324  return R;
1325 }
1326 
1327 void Parser::LateTemplateParserCallback(void *P, LateParsedTemplate &LPT) {
1328  ((Parser *)P)->ParseLateTemplatedFuncDef(LPT);
1329 }
1330 
1331 /// \brief Late parse a C++ function template in Microsoft mode.
1332 void Parser::ParseLateTemplatedFuncDef(LateParsedTemplate &LPT) {
1333  if (!LPT.D)
1334  return;
1335 
1336  // Get the FunctionDecl.
1337  FunctionDecl *FunD = LPT.D->getAsFunction();
1338  // Track template parameter depth.
1339  TemplateParameterDepthRAII CurTemplateDepthTracker(TemplateParameterDepth);
1340 
1341  // To restore the context after late parsing.
1342  Sema::ContextRAII GlobalSavedContext(
1343  Actions, Actions.Context.getTranslationUnitDecl());
1344 
1345  SmallVector<ParseScope*, 4> TemplateParamScopeStack;
1346 
1347  // Get the list of DeclContexts to reenter.
1348  SmallVector<DeclContext*, 4> DeclContextsToReenter;
1349  DeclContext *DD = FunD;
1350  while (DD && !DD->isTranslationUnit()) {
1351  DeclContextsToReenter.push_back(DD);
1352  DD = DD->getLexicalParent();
1353  }
1354 
1355  // Reenter template scopes from outermost to innermost.
1357  DeclContextsToReenter.rbegin();
1358  for (; II != DeclContextsToReenter.rend(); ++II) {
1359  TemplateParamScopeStack.push_back(new ParseScope(this,
1361  unsigned NumParamLists =
1362  Actions.ActOnReenterTemplateScope(getCurScope(), cast<Decl>(*II));
1363  CurTemplateDepthTracker.addDepth(NumParamLists);
1364  if (*II != FunD) {
1365  TemplateParamScopeStack.push_back(new ParseScope(this, Scope::DeclScope));
1366  Actions.PushDeclContext(Actions.getCurScope(), *II);
1367  }
1368  }
1369 
1370  assert(!LPT.Toks.empty() && "Empty body!");
1371 
1372  // Append the current token at the end of the new token stream so that it
1373  // doesn't get lost.
1374  LPT.Toks.push_back(Tok);
1375  PP.EnterTokenStream(LPT.Toks, true);
1376 
1377  // Consume the previously pushed token.
1378  ConsumeAnyToken(/*ConsumeCodeCompletionTok=*/true);
1379  assert(Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try) &&
1380  "Inline method not starting with '{', ':' or 'try'");
1381 
1382  // Parse the method body. Function body parsing code is similar enough
1383  // to be re-used for method bodies as well.
1384  ParseScope FnScope(this, Scope::FnScope | Scope::DeclScope |
1386 
1387  // Recreate the containing function DeclContext.
1388  Sema::ContextRAII FunctionSavedContext(Actions,
1389  Actions.getContainingDC(FunD));
1390 
1391  Actions.ActOnStartOfFunctionDef(getCurScope(), FunD);
1392 
1393  if (Tok.is(tok::kw_try)) {
1394  ParseFunctionTryBlock(LPT.D, FnScope);
1395  } else {
1396  if (Tok.is(tok::colon))
1397  ParseConstructorInitializer(LPT.D);
1398  else
1399  Actions.ActOnDefaultCtorInitializers(LPT.D);
1400 
1401  if (Tok.is(tok::l_brace)) {
1402  assert((!isa<FunctionTemplateDecl>(LPT.D) ||
1403  cast<FunctionTemplateDecl>(LPT.D)
1404  ->getTemplateParameters()
1405  ->getDepth() == TemplateParameterDepth - 1) &&
1406  "TemplateParameterDepth should be greater than the depth of "
1407  "current template being instantiated!");
1408  ParseFunctionStatementBody(LPT.D, FnScope);
1409  Actions.UnmarkAsLateParsedTemplate(FunD);
1410  } else
1411  Actions.ActOnFinishFunctionBody(LPT.D, nullptr);
1412  }
1413 
1414  // Exit scopes.
1415  FnScope.Exit();
1417  TemplateParamScopeStack.rbegin();
1418  for (; I != TemplateParamScopeStack.rend(); ++I)
1419  delete *I;
1420 }
1421 
1422 /// \brief Lex a delayed template function for late parsing.
1423 void Parser::LexTemplateFunctionForLateParsing(CachedTokens &Toks) {
1424  tok::TokenKind kind = Tok.getKind();
1425  if (!ConsumeAndStoreFunctionPrologue(Toks)) {
1426  // Consume everything up to (and including) the matching right brace.
1427  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
1428  }
1429 
1430  // If we're in a function-try-block, we need to store all the catch blocks.
1431  if (kind == tok::kw_try) {
1432  while (Tok.is(tok::kw_catch)) {
1433  ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false);
1434  ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
1435  }
1436  }
1437 }
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:1698
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:1106
SourceLocation StartLocation
The location of the first token that describes this unqualified-id, which will be the location of the...
Definition: DeclSpec.h:965
IdentifierInfo * Identifier
When Kind == IK_Identifier, the parsed identifier, or when Kind == IK_UserLiteralId, the identifier suffix.
Definition: DeclSpec.h:935
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:86
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:1353
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:95
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:10632
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:1720
Stores a list of template parameters for a TemplateDecl and its derived classes.
Definition: DeclTemplate.h:68
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:945
Information about a template-id annotation token.
RecordDecl - Represents a struct/union/class.
Definition: Decl.h:3482
const Token & NextToken()
NextToken - This peeks ahead one token and returns it without consuming it.
Definition: Parser.h:613
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:324
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:988
Decl * ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, unsigned Depth, unsigned Position, SourceLocation EqualLoc, Expr *DefaultArg)
OverloadedOperatorKind Operator
The kind of overloaded operator.
Definition: DeclSpec.h:918
struct OFI OperatorFunctionId
When Kind == IK_OperatorFunctionId, the overloaded operator that we parsed.
Definition: DeclSpec.h:939
CachedTokens Toks
Definition: Sema.h:10687
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:886
PtrTy get() const
Definition: Ownership.h:162
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
SourceLocation ConsumeAnyToken(bool ConsumeCodeCompletionTok=false)
ConsumeAnyToken - Dispatch to the right Consume* method based on the current token type...
Definition: Parser.h:344
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:712
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:216
bool isOneOf(A K1, B K2) const
Definition: FormatToken.h:306
A class for parsing a declarator.
TemplateParameterList * ActOnTemplateParameterList(unsigned Depth, SourceLocation ExportLoc, SourceLocation TemplateLoc, SourceLocation LAngleLoc, ArrayRef< NamedDecl *> Params, SourceLocation RAngleLoc, Expr *RequiresClause)
ActOnTemplateParameterList - Builds a TemplateParameterList, optionally constrained by RequiresClause...
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:1347
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:4049
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:1817
OpaquePtr< TemplateName > TemplateTy
Definition: Parser.h:288
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:178
This is a compound statement scope.
Definition: Scope.h:129
int Depth
Definition: ASTDiff.cpp:191
TemplateNameKind
Specifies the kind of template name that an identifier refers to.
Definition: TemplateKinds.h:21
void setEllipsisLoc(SourceLocation EL)
Definition: DeclSpec.h:2417
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:158
TemplateNameKind isTemplateName(Scope *S, CXXScopeSpec &SS, bool hasTemplateKeyword, UnqualifiedId &Name, ParsedType ObjectType, bool EnteringContext, TemplateTy &Template, bool &MemberOfUnknownSpecialization)
bool isUsable() const
Definition: Ownership.h:159
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:271
static CharSourceRange getCharRange(SourceRange R)
SourceManager & getSourceManager() const
Definition: Preprocessor.h:815
A class for parsing a DeclSpec.
Stop skipping at semicolon.
Definition: Parser.h:925
ActionResult - This structure is used while parsing/acting on expressions, stmts, etc...
Definition: Ownership.h:144
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:220
bool hasName() const
hasName - Whether this declarator has a name, which might be an identifier (accessible via getIdentif...
Definition: DeclSpec.h:2091
Encodes a location in the source.
void setLength(unsigned Len)
Definition: Token.h:133
bool is(tok::TokenKind Kind) const
Definition: FormatToken.h:297
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:278
A template type parameter, stored as a type.
ExprResult ParseConstantExpressionInExprEvalContext(TypeCastState isTypeCast=NotTypeCast)
Definition: ParseExpr.cpp:196
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
Dataflow Directional Tag Classes.
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:1252
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
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:909
SmallVector< TemplateParameterList *, 4 > TemplateParameterLists
Definition: Parser.h:290
This is a scope that can contain a declaration.
Definition: Scope.h:58
SourceLocation getIdentifierLoc() const
Definition: DeclSpec.h:2107
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:316
SourceLocation getEllipsisLoc() const
Definition: DeclSpec.h:2416
Decl * D
The template function declaration to be late parsed.
Definition: Sema.h:10689
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:61
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:10686
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:995
bool isTranslationUnit() const
Definition: DeclBase.h:1401
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:927
A RAII object to temporarily push a declaration context.
Definition: Sema.h:705