1 //===--- ParseTemplate.cpp - Template Parsing -----------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements parsing of C++ templates.
12 //===----------------------------------------------------------------------===//
14 #include "clang/Parse/Parser.h"
15 #include "clang/Parse/ParseDiagnostic.h"
16 #include "clang/Sema/DeclSpec.h"
17 #include "clang/Sema/ParsedTemplate.h"
18 #include "clang/Sema/Scope.h"
19 #include "RAIIObjectsForParser.h"
20 #include "clang/AST/DeclTemplate.h"
21 #include "clang/AST/ASTConsumer.h"
22 using namespace clang;
24 /// \brief Parse a template declaration, explicit instantiation, or
25 /// explicit specialization.
27 Parser::ParseDeclarationStartingWithTemplate(unsigned Context,
28 SourceLocation &DeclEnd,
30 AttributeList *AccessAttrs) {
31 ObjCDeclContextSwitch ObjCDC(*this);
33 if (Tok.is(tok::kw_template) && NextToken().isNot(tok::less)) {
34 return ParseExplicitInstantiation(Context,
35 SourceLocation(), ConsumeToken(),
38 return ParseTemplateDeclarationOrSpecialization(Context, DeclEnd, AS,
42 /// \brief RAII class that manages the template parameter depth.
44 class TemplateParameterDepthCounter {
49 explicit TemplateParameterDepthCounter(unsigned &Depth)
50 : Depth(Depth), AddedLevels(0) { }
52 ~TemplateParameterDepthCounter() {
61 operator unsigned() const { return Depth; }
65 /// \brief Parse a template declaration or an explicit specialization.
67 /// Template declarations include one or more template parameter lists
68 /// and either the function or class template declaration. Explicit
69 /// specializations contain one or more 'template < >' prefixes
70 /// followed by a (possibly templated) declaration. Since the
71 /// syntactic form of both features is nearly identical, we parse all
72 /// of the template headers together and let semantic analysis sort
73 /// the declarations from the explicit specializations.
75 /// template-declaration: [C++ temp]
76 /// 'export'[opt] 'template' '<' template-parameter-list '>' declaration
78 /// explicit-specialization: [ C++ temp.expl.spec]
79 /// 'template' '<' '>' declaration
81 Parser::ParseTemplateDeclarationOrSpecialization(unsigned Context,
82 SourceLocation &DeclEnd,
84 AttributeList *AccessAttrs) {
85 assert((Tok.is(tok::kw_export) || Tok.is(tok::kw_template)) &&
86 "Token does not start a template declaration.");
88 // Enter template-parameter scope.
89 ParseScope TemplateParmScope(this, Scope::TemplateParamScope);
91 // Tell the action that names should be checked in the context of
92 // the declaration to come.
94 ParsingTemplateParams(*this, ParsingDeclRAIIObject::NoParent);
96 // Parse multiple levels of template headers within this template
97 // parameter scope, e.g.,
99 // template<typename T>
100 // template<typename U>
101 // class A<T>::B { ... };
103 // We parse multiple levels non-recursively so that we can build a
104 // single data structure containing all of the template parameter
105 // lists to easily differentiate between the case above and:
107 // template<typename T>
109 // template<typename U> class B;
112 // In the first case, the action for declaring A<T>::B receives
113 // both template parameter lists. In the second case, the action for
114 // defining A<T>::B receives just the inner template parameter list
115 // (and retrieves the outer template parameter list from its
117 bool isSpecialization = true;
118 bool LastParamListWasEmpty = false;
119 TemplateParameterLists ParamLists;
120 TemplateParameterDepthCounter Depth(TemplateParameterDepth);
122 // Consume the 'export', if any.
123 SourceLocation ExportLoc;
124 if (Tok.is(tok::kw_export)) {
125 ExportLoc = ConsumeToken();
128 // Consume the 'template', which should be here.
129 SourceLocation TemplateLoc;
130 if (Tok.is(tok::kw_template)) {
131 TemplateLoc = ConsumeToken();
133 Diag(Tok.getLocation(), diag::err_expected_template);
137 // Parse the '<' template-parameter-list '>'
138 SourceLocation LAngleLoc, RAngleLoc;
139 SmallVector<Decl*, 4> TemplateParams;
140 if (ParseTemplateParameters(Depth, TemplateParams, LAngleLoc,
142 // Skip until the semi-colon or a }.
143 SkipUntil(tok::r_brace, true, true);
144 if (Tok.is(tok::semi))
149 ParamLists.push_back(
150 Actions.ActOnTemplateParameterList(Depth, ExportLoc,
151 TemplateLoc, LAngleLoc,
152 TemplateParams.data(),
153 TemplateParams.size(), RAngleLoc));
155 if (!TemplateParams.empty()) {
156 isSpecialization = false;
159 LastParamListWasEmpty = true;
161 } while (Tok.is(tok::kw_export) || Tok.is(tok::kw_template));
163 // Parse the actual template declaration.
164 return ParseSingleDeclarationAfterTemplate(Context,
165 ParsedTemplateInfo(&ParamLists,
167 LastParamListWasEmpty),
168 ParsingTemplateParams,
169 DeclEnd, AS, AccessAttrs);
172 /// \brief Parse a single declaration that declares a template,
173 /// template specialization, or explicit instantiation of a template.
175 /// \param TemplateParams if non-NULL, the template parameter lists
176 /// that preceded this declaration. In this case, the declaration is a
177 /// template declaration, out-of-line definition of a template, or an
178 /// explicit template specialization. When NULL, the declaration is an
179 /// explicit template instantiation.
181 /// \param TemplateLoc when TemplateParams is NULL, the location of
182 /// the 'template' keyword that indicates that we have an explicit
183 /// template instantiation.
185 /// \param DeclEnd will receive the source location of the last token
186 /// within this declaration.
188 /// \param AS the access specifier associated with this
189 /// declaration. Will be AS_none for namespace-scope declarations.
191 /// \returns the new declaration.
193 Parser::ParseSingleDeclarationAfterTemplate(
195 const ParsedTemplateInfo &TemplateInfo,
196 ParsingDeclRAIIObject &DiagsFromTParams,
197 SourceLocation &DeclEnd,
199 AttributeList *AccessAttrs) {
200 assert(TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate &&
201 "Template information required");
203 if (Context == Declarator::MemberContext) {
204 // We are parsing a member template.
205 ParseCXXClassMemberDeclaration(AS, AccessAttrs, TemplateInfo,
210 ParsedAttributesWithRange prefixAttrs(AttrFactory);
211 MaybeParseCXX0XAttributes(prefixAttrs);
213 if (Tok.is(tok::kw_using))
214 return ParseUsingDirectiveOrDeclaration(Context, TemplateInfo, DeclEnd,
217 // Parse the declaration specifiers, stealing any diagnostics from
218 // the template parameters.
219 ParsingDeclSpec DS(*this, &DiagsFromTParams);
221 // Move the attributes from the prefix into the DS.
222 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation)
223 ProhibitAttributes(prefixAttrs);
225 DS.takeAttributesFrom(prefixAttrs);
227 ParseDeclarationSpecifiers(DS, TemplateInfo, AS,
228 getDeclSpecContextFromDeclaratorContext(Context));
230 if (Tok.is(tok::semi)) {
231 DeclEnd = ConsumeToken();
232 Decl *Decl = Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS);
237 // Parse the declarator.
238 ParsingDeclarator DeclaratorInfo(*this, DS, (Declarator::TheContext)Context);
239 ParseDeclarator(DeclaratorInfo);
240 // Error parsing the declarator?
241 if (!DeclaratorInfo.hasName()) {
242 // If so, skip until the semi-colon or a }.
243 SkipUntil(tok::r_brace, true, true);
244 if (Tok.is(tok::semi))
249 LateParsedAttrList LateParsedAttrs(true);
250 if (DeclaratorInfo.isFunctionDeclarator())
251 MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs);
253 // If we have a declaration or declarator list, handle it.
254 if (isDeclarationAfterDeclarator()) {
255 // Parse this declaration.
256 Decl *ThisDecl = ParseDeclarationAfterDeclarator(DeclaratorInfo,
259 if (Tok.is(tok::comma)) {
260 Diag(Tok, diag::err_multiple_template_declarators)
261 << (int)TemplateInfo.Kind;
262 SkipUntil(tok::semi, true, false);
266 // Eat the semi colon after the declaration.
267 ExpectAndConsumeSemi(diag::err_expected_semi_declaration);
268 if (LateParsedAttrs.size() > 0)
269 ParseLexedAttributeList(LateParsedAttrs, ThisDecl, true, false);
270 DeclaratorInfo.complete(ThisDecl);
274 if (DeclaratorInfo.isFunctionDeclarator() &&
275 isStartOfFunctionDefinition(DeclaratorInfo)) {
276 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
277 // Recover by ignoring the 'typedef'. This was probably supposed to be
278 // the 'typename' keyword, which we should have already suggested adding
279 // if it's appropriate.
280 Diag(DS.getStorageClassSpecLoc(), diag::err_function_declared_typedef)
281 << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc());
282 DS.ClearStorageClassSpecs();
284 return ParseFunctionDefinition(DeclaratorInfo, TemplateInfo,
288 if (DeclaratorInfo.isFunctionDeclarator())
289 Diag(Tok, diag::err_expected_fn_body);
291 Diag(Tok, diag::err_invalid_token_after_toplevel_declarator);
292 SkipUntil(tok::semi);
296 /// ParseTemplateParameters - Parses a template-parameter-list enclosed in
297 /// angle brackets. Depth is the depth of this template-parameter-list, which
298 /// is the number of template headers directly enclosing this template header.
299 /// TemplateParams is the current list of template parameters we're building.
300 /// The template parameter we parse will be added to this list. LAngleLoc and
301 /// RAngleLoc will receive the positions of the '<' and '>', respectively,
302 /// that enclose this template parameter list.
304 /// \returns true if an error occurred, false otherwise.
305 bool Parser::ParseTemplateParameters(unsigned Depth,
306 SmallVectorImpl<Decl*> &TemplateParams,
307 SourceLocation &LAngleLoc,
308 SourceLocation &RAngleLoc) {
309 // Get the template parameter list.
310 if (!Tok.is(tok::less)) {
311 Diag(Tok.getLocation(), diag::err_expected_less_after) << "template";
314 LAngleLoc = ConsumeToken();
316 // Try to parse the template parameter list.
318 if (!Tok.is(tok::greater) && !Tok.is(tok::greatergreater))
319 Failed = ParseTemplateParameterList(Depth, TemplateParams);
321 if (Tok.is(tok::greatergreater)) {
322 // No diagnostic required here: a template-parameter-list can only be
323 // followed by a declaration or, for a template template parameter, the
324 // 'class' keyword. Therefore, the second '>' will be diagnosed later.
325 // This matters for elegant diagnosis of:
326 // template<template<typename>> struct S;
327 Tok.setKind(tok::greater);
328 RAngleLoc = Tok.getLocation();
329 Tok.setLocation(Tok.getLocation().getLocWithOffset(1));
330 } else if (Tok.is(tok::greater))
331 RAngleLoc = ConsumeToken();
333 Diag(Tok.getLocation(), diag::err_expected_greater);
339 /// ParseTemplateParameterList - Parse a template parameter list. If
340 /// the parsing fails badly (i.e., closing bracket was left out), this
341 /// will try to put the token stream in a reasonable position (closing
342 /// a statement, etc.) and return false.
344 /// template-parameter-list: [C++ temp]
345 /// template-parameter
346 /// template-parameter-list ',' template-parameter
348 Parser::ParseTemplateParameterList(unsigned Depth,
349 SmallVectorImpl<Decl*> &TemplateParams) {
352 = ParseTemplateParameter(Depth, TemplateParams.size())) {
353 TemplateParams.push_back(TmpParam);
355 // If we failed to parse a template parameter, skip until we find
356 // a comma or closing brace.
357 SkipUntil(tok::comma, tok::greater, tok::greatergreater, true, true);
360 // Did we find a comma or the end of the template parmeter list?
361 if (Tok.is(tok::comma)) {
363 } else if (Tok.is(tok::greater) || Tok.is(tok::greatergreater)) {
364 // Don't consume this... that's done by template parser.
367 // Somebody probably forgot to close the template. Skip ahead and
368 // try to get out of the expression. This error is currently
369 // subsumed by whatever goes on in ParseTemplateParameter.
370 Diag(Tok.getLocation(), diag::err_expected_comma_greater);
371 SkipUntil(tok::comma, tok::greater, tok::greatergreater, true, true);
378 /// \brief Determine whether the parser is at the start of a template
380 bool Parser::isStartOfTemplateTypeParameter() {
381 if (Tok.is(tok::kw_class)) {
382 // "class" may be the start of an elaborated-type-specifier or a
383 // type-parameter. Per C++ [temp.param]p3, we prefer the type-parameter.
384 switch (NextToken().getKind()) {
388 case tok::greatergreater:
392 case tok::identifier:
393 // This may be either a type-parameter or an elaborated-type-specifier.
394 // We have to look further.
401 switch (GetLookAheadToken(2).getKind()) {
405 case tok::greatergreater:
413 if (Tok.isNot(tok::kw_typename))
416 // C++ [temp.param]p2:
417 // There is no semantic difference between class and typename in a
418 // template-parameter. typename followed by an unqualified-id
419 // names a template type parameter. typename followed by a
420 // qualified-id denotes the type in a non-type
421 // parameter-declaration.
422 Token Next = NextToken();
424 // If we have an identifier, skip over it.
425 if (Next.getKind() == tok::identifier)
426 Next = GetLookAheadToken(2);
428 switch (Next.getKind()) {
432 case tok::greatergreater:
441 /// ParseTemplateParameter - Parse a template-parameter (C++ [temp.param]).
443 /// template-parameter: [C++ temp.param]
445 /// parameter-declaration
447 /// type-parameter: (see below)
448 /// 'class' ...[opt] identifier[opt]
449 /// 'class' identifier[opt] '=' type-id
450 /// 'typename' ...[opt] identifier[opt]
451 /// 'typename' identifier[opt] '=' type-id
452 /// 'template' '<' template-parameter-list '>'
453 /// 'class' ...[opt] identifier[opt]
454 /// 'template' '<' template-parameter-list '>' 'class' identifier[opt]
456 Decl *Parser::ParseTemplateParameter(unsigned Depth, unsigned Position) {
457 if (isStartOfTemplateTypeParameter())
458 return ParseTypeParameter(Depth, Position);
460 if (Tok.is(tok::kw_template))
461 return ParseTemplateTemplateParameter(Depth, Position);
463 // If it's none of the above, then it must be a parameter declaration.
464 // NOTE: This will pick up errors in the closure of the template parameter
465 // list (e.g., template < ; Check here to implement >> style closures.
466 return ParseNonTypeTemplateParameter(Depth, Position);
469 /// ParseTypeParameter - Parse a template type parameter (C++ [temp.param]).
470 /// Other kinds of template parameters are parsed in
471 /// ParseTemplateTemplateParameter and ParseNonTypeTemplateParameter.
473 /// type-parameter: [C++ temp.param]
474 /// 'class' ...[opt][C++0x] identifier[opt]
475 /// 'class' identifier[opt] '=' type-id
476 /// 'typename' ...[opt][C++0x] identifier[opt]
477 /// 'typename' identifier[opt] '=' type-id
478 Decl *Parser::ParseTypeParameter(unsigned Depth, unsigned Position) {
479 assert((Tok.is(tok::kw_class) || Tok.is(tok::kw_typename)) &&
480 "A type-parameter starts with 'class' or 'typename'");
482 // Consume the 'class' or 'typename' keyword.
483 bool TypenameKeyword = Tok.is(tok::kw_typename);
484 SourceLocation KeyLoc = ConsumeToken();
486 // Grab the ellipsis (if given).
487 bool Ellipsis = false;
488 SourceLocation EllipsisLoc;
489 if (Tok.is(tok::ellipsis)) {
491 EllipsisLoc = ConsumeToken();
494 getLangOpts().CPlusPlus0x
495 ? diag::warn_cxx98_compat_variadic_templates
496 : diag::ext_variadic_templates);
499 // Grab the template parameter name (if given)
500 SourceLocation NameLoc;
501 IdentifierInfo* ParamName = 0;
502 if (Tok.is(tok::identifier)) {
503 ParamName = Tok.getIdentifierInfo();
504 NameLoc = ConsumeToken();
505 } else if (Tok.is(tok::equal) || Tok.is(tok::comma) ||
506 Tok.is(tok::greater) || Tok.is(tok::greatergreater)) {
507 // Unnamed template parameter. Don't have to do anything here, just
508 // don't consume this token.
510 Diag(Tok.getLocation(), diag::err_expected_ident);
514 // Grab a default argument (if available).
515 // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before
516 // we introduce the type parameter into the local scope.
517 SourceLocation EqualLoc;
518 ParsedType DefaultArg;
519 if (Tok.is(tok::equal)) {
520 EqualLoc = ConsumeToken();
521 DefaultArg = ParseTypeName(/*Range=*/0,
522 Declarator::TemplateTypeArgContext).get();
525 return Actions.ActOnTypeParameter(getCurScope(), TypenameKeyword, Ellipsis,
526 EllipsisLoc, KeyLoc, ParamName, NameLoc,
527 Depth, Position, EqualLoc, DefaultArg);
530 /// ParseTemplateTemplateParameter - Handle the parsing of template
531 /// template parameters.
533 /// type-parameter: [C++ temp.param]
534 /// 'template' '<' template-parameter-list '>' 'class'
535 /// ...[opt] identifier[opt]
536 /// 'template' '<' template-parameter-list '>' 'class' identifier[opt]
539 Parser::ParseTemplateTemplateParameter(unsigned Depth, unsigned Position) {
540 assert(Tok.is(tok::kw_template) && "Expected 'template' keyword");
542 // Handle the template <...> part.
543 SourceLocation TemplateLoc = ConsumeToken();
544 SmallVector<Decl*,8> TemplateParams;
545 SourceLocation LAngleLoc, RAngleLoc;
547 ParseScope TemplateParmScope(this, Scope::TemplateParamScope);
548 if (ParseTemplateParameters(Depth + 1, TemplateParams, LAngleLoc,
554 // Generate a meaningful error if the user forgot to put class before the
555 // identifier, comma, or greater. Provide a fixit if the identifier, comma,
556 // or greater appear immediately or after 'typename' or 'struct'. In the
557 // latter case, replace the keyword with 'class'.
558 if (!Tok.is(tok::kw_class)) {
559 bool Replace = Tok.is(tok::kw_typename) || Tok.is(tok::kw_struct);
560 const Token& Next = Replace ? NextToken() : Tok;
561 if (Next.is(tok::identifier) || Next.is(tok::comma) ||
562 Next.is(tok::greater) || Next.is(tok::greatergreater) ||
563 Next.is(tok::ellipsis))
564 Diag(Tok.getLocation(), diag::err_class_on_template_template_param)
565 << (Replace ? FixItHint::CreateReplacement(Tok.getLocation(), "class")
566 : FixItHint::CreateInsertion(Tok.getLocation(), "class "));
568 Diag(Tok.getLocation(), diag::err_class_on_template_template_param);
575 // Parse the ellipsis, if given.
576 SourceLocation EllipsisLoc;
577 if (Tok.is(tok::ellipsis)) {
578 EllipsisLoc = ConsumeToken();
581 getLangOpts().CPlusPlus0x
582 ? diag::warn_cxx98_compat_variadic_templates
583 : diag::ext_variadic_templates);
586 // Get the identifier, if given.
587 SourceLocation NameLoc;
588 IdentifierInfo* ParamName = 0;
589 if (Tok.is(tok::identifier)) {
590 ParamName = Tok.getIdentifierInfo();
591 NameLoc = ConsumeToken();
592 } else if (Tok.is(tok::equal) || Tok.is(tok::comma) ||
593 Tok.is(tok::greater) || Tok.is(tok::greatergreater)) {
594 // Unnamed template parameter. Don't have to do anything here, just
595 // don't consume this token.
597 Diag(Tok.getLocation(), diag::err_expected_ident);
601 TemplateParameterList *ParamList =
602 Actions.ActOnTemplateParameterList(Depth, SourceLocation(),
603 TemplateLoc, LAngleLoc,
604 TemplateParams.data(),
605 TemplateParams.size(),
608 // Grab a default argument (if available).
609 // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before
610 // we introduce the template parameter into the local scope.
611 SourceLocation EqualLoc;
612 ParsedTemplateArgument DefaultArg;
613 if (Tok.is(tok::equal)) {
614 EqualLoc = ConsumeToken();
615 DefaultArg = ParseTemplateTemplateArgument();
616 if (DefaultArg.isInvalid()) {
617 Diag(Tok.getLocation(),
618 diag::err_default_template_template_parameter_not_template);
619 SkipUntil(tok::comma, tok::greater, tok::greatergreater, true, true);
623 return Actions.ActOnTemplateTemplateParameter(getCurScope(), TemplateLoc,
624 ParamList, EllipsisLoc,
625 ParamName, NameLoc, Depth,
626 Position, EqualLoc, DefaultArg);
629 /// ParseNonTypeTemplateParameter - Handle the parsing of non-type
630 /// template parameters (e.g., in "template<int Size> class array;").
632 /// template-parameter:
634 /// parameter-declaration
636 Parser::ParseNonTypeTemplateParameter(unsigned Depth, unsigned Position) {
637 // Parse the declaration-specifiers (i.e., the type).
638 // FIXME: The type should probably be restricted in some way... Not all
639 // declarators (parts of declarators?) are accepted for parameters.
640 DeclSpec DS(AttrFactory);
641 ParseDeclarationSpecifiers(DS);
643 // Parse this as a typename.
644 Declarator ParamDecl(DS, Declarator::TemplateParamContext);
645 ParseDeclarator(ParamDecl);
646 if (DS.getTypeSpecType() == DeclSpec::TST_unspecified) {
647 Diag(Tok.getLocation(), diag::err_expected_template_parameter);
651 // If there is a default value, parse it.
652 // Per C++0x [basic.scope.pdecl]p9, we parse the default argument before
653 // we introduce the template parameter into the local scope.
654 SourceLocation EqualLoc;
655 ExprResult DefaultArg;
656 if (Tok.is(tok::equal)) {
657 EqualLoc = ConsumeToken();
659 // C++ [temp.param]p15:
660 // When parsing a default template-argument for a non-type
661 // template-parameter, the first non-nested > is taken as the
662 // end of the template-parameter-list rather than a greater-than
664 GreaterThanIsOperatorScope G(GreaterThanIsOperator, false);
665 EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated);
667 DefaultArg = ParseAssignmentExpression();
668 if (DefaultArg.isInvalid())
669 SkipUntil(tok::comma, tok::greater, true, true);
672 // Create the parameter.
673 return Actions.ActOnNonTypeTemplateParameter(getCurScope(), ParamDecl,
674 Depth, Position, EqualLoc,
678 /// \brief Parses a template-id that after the template name has
679 /// already been parsed.
681 /// This routine takes care of parsing the enclosed template argument
682 /// list ('<' template-parameter-list [opt] '>') and placing the
683 /// results into a form that can be transferred to semantic analysis.
685 /// \param Template the template declaration produced by isTemplateName
687 /// \param TemplateNameLoc the source location of the template name
689 /// \param SS if non-NULL, the nested-name-specifier preceding the
692 /// \param ConsumeLastToken if true, then we will consume the last
693 /// token that forms the template-id. Otherwise, we will leave the
694 /// last token in the stream (e.g., so that it can be replaced with an
695 /// annotation token).
697 Parser::ParseTemplateIdAfterTemplateName(TemplateTy Template,
698 SourceLocation TemplateNameLoc,
699 const CXXScopeSpec &SS,
700 bool ConsumeLastToken,
701 SourceLocation &LAngleLoc,
702 TemplateArgList &TemplateArgs,
703 SourceLocation &RAngleLoc) {
704 assert(Tok.is(tok::less) && "Must have already parsed the template-name");
707 LAngleLoc = ConsumeToken();
709 // Parse the optional template-argument-list.
710 bool Invalid = false;
712 GreaterThanIsOperatorScope G(GreaterThanIsOperator, false);
713 if (Tok.isNot(tok::greater) && Tok.isNot(tok::greatergreater))
714 Invalid = ParseTemplateArgumentList(TemplateArgs);
717 // Try to find the closing '>'.
718 SkipUntil(tok::greater, true, !ConsumeLastToken);
724 // What will be left once we've consumed the '>'.
725 tok::TokenKind RemainingToken;
726 const char *ReplacementStr = "> >";
728 switch (Tok.getKind()) {
730 Diag(Tok.getLocation(), diag::err_expected_greater);
734 // Determine the location of the '>' token. Only consume this token
735 // if the caller asked us to.
736 RAngleLoc = Tok.getLocation();
737 if (ConsumeLastToken)
741 case tok::greatergreater:
742 RemainingToken = tok::greater;
745 case tok::greatergreatergreater:
746 RemainingToken = tok::greatergreater;
749 case tok::greaterequal:
750 RemainingToken = tok::equal;
751 ReplacementStr = "> =";
754 case tok::greatergreaterequal:
755 RemainingToken = tok::greaterequal;
759 // This template-id is terminated by a token which starts with a '>'. Outside
760 // C++11, this is now error recovery, and in C++11, this is error recovery if
761 // the token isn't '>>'.
763 RAngleLoc = Tok.getLocation();
765 // The source range of the '>>' or '>=' at the start of the token.
766 CharSourceRange ReplacementRange =
767 CharSourceRange::getCharRange(RAngleLoc,
768 Lexer::AdvanceToTokenCharacter(RAngleLoc, 2, PP.getSourceManager(),
771 // A hint to put a space between the '>>'s. In order to make the hint as
772 // clear as possible, we include the characters either side of the space in
773 // the replacement, rather than just inserting a space at SecondCharLoc.
774 FixItHint Hint1 = FixItHint::CreateReplacement(ReplacementRange,
777 // A hint to put another space after the token, if it would otherwise be
778 // lexed differently.
780 Token Next = NextToken();
781 if ((RemainingToken == tok::greater ||
782 RemainingToken == tok::greatergreater) &&
783 (Next.is(tok::greater) || Next.is(tok::greatergreater) ||
784 Next.is(tok::greatergreatergreater) || Next.is(tok::equal) ||
785 Next.is(tok::greaterequal) || Next.is(tok::greatergreaterequal) ||
786 Next.is(tok::equalequal)) &&
787 areTokensAdjacent(Tok, Next))
788 Hint2 = FixItHint::CreateInsertion(Next.getLocation(), " ");
790 unsigned DiagId = diag::err_two_right_angle_brackets_need_space;
791 if (getLangOpts().CPlusPlus0x && Tok.is(tok::greatergreater))
792 DiagId = diag::warn_cxx98_compat_two_right_angle_brackets;
793 else if (Tok.is(tok::greaterequal))
794 DiagId = diag::err_right_angle_bracket_equal_needs_space;
795 Diag(Tok.getLocation(), DiagId) << Hint1 << Hint2;
797 // Strip the initial '>' from the token.
798 if (RemainingToken == tok::equal && Next.is(tok::equal) &&
799 areTokensAdjacent(Tok, Next)) {
800 // Join two adjacent '=' tokens into one, for cases like:
801 // void (*p)() = f<int>;
804 Tok.setKind(tok::equalequal);
805 Tok.setLength(Tok.getLength() + 1);
807 Tok.setKind(RemainingToken);
808 Tok.setLength(Tok.getLength() - 1);
810 Tok.setLocation(Lexer::AdvanceToTokenCharacter(RAngleLoc, 1,
811 PP.getSourceManager(),
814 if (!ConsumeLastToken) {
815 // Since we're not supposed to consume the '>' token, we need to push
816 // this token and revert the current token back to the '>'.
818 Tok.setKind(tok::greater);
820 Tok.setLocation(RAngleLoc);
826 /// \brief Replace the tokens that form a simple-template-id with an
827 /// annotation token containing the complete template-id.
829 /// The first token in the stream must be the name of a template that
830 /// is followed by a '<'. This routine will parse the complete
831 /// simple-template-id and replace the tokens with a single annotation
832 /// token with one of two different kinds: if the template-id names a
833 /// type (and \p AllowTypeAnnotation is true), the annotation token is
834 /// a type annotation that includes the optional nested-name-specifier
835 /// (\p SS). Otherwise, the annotation token is a template-id
836 /// annotation that does not include the optional
837 /// nested-name-specifier.
839 /// \param Template the declaration of the template named by the first
840 /// token (an identifier), as returned from \c Action::isTemplateName().
842 /// \param TemplateNameKind the kind of template that \p Template
843 /// refers to, as returned from \c Action::isTemplateName().
845 /// \param SS if non-NULL, the nested-name-specifier that precedes
846 /// this template name.
848 /// \param TemplateKWLoc if valid, specifies that this template-id
849 /// annotation was preceded by the 'template' keyword and gives the
850 /// location of that keyword. If invalid (the default), then this
851 /// template-id was not preceded by a 'template' keyword.
853 /// \param AllowTypeAnnotation if true (the default), then a
854 /// simple-template-id that refers to a class template, template
855 /// template parameter, or other template that produces a type will be
856 /// replaced with a type annotation token. Otherwise, the
857 /// simple-template-id is always replaced with a template-id
858 /// annotation token.
860 /// If an unrecoverable parse error occurs and no annotation token can be
861 /// formed, this function returns true.
863 bool Parser::AnnotateTemplateIdToken(TemplateTy Template, TemplateNameKind TNK,
865 SourceLocation TemplateKWLoc,
866 UnqualifiedId &TemplateName,
867 bool AllowTypeAnnotation) {
868 assert(getLangOpts().CPlusPlus && "Can only annotate template-ids in C++");
869 assert(Template && Tok.is(tok::less) &&
870 "Parser isn't at the beginning of a template-id");
872 // Consume the template-name.
873 SourceLocation TemplateNameLoc = TemplateName.getSourceRange().getBegin();
875 // Parse the enclosed template argument list.
876 SourceLocation LAngleLoc, RAngleLoc;
877 TemplateArgList TemplateArgs;
878 bool Invalid = ParseTemplateIdAfterTemplateName(Template,
880 SS, false, LAngleLoc,
885 // If we failed to parse the template ID but skipped ahead to a >, we're not
886 // going to be able to form a token annotation. Eat the '>' if present.
887 if (Tok.is(tok::greater))
892 ASTTemplateArgsPtr TemplateArgsPtr(TemplateArgs);
894 // Build the annotation token.
895 if (TNK == TNK_Type_template && AllowTypeAnnotation) {
897 = Actions.ActOnTemplateIdType(SS, TemplateKWLoc,
898 Template, TemplateNameLoc,
899 LAngleLoc, TemplateArgsPtr, RAngleLoc);
900 if (Type.isInvalid()) {
901 // If we failed to parse the template ID but skipped ahead to a >, we're not
902 // going to be able to form a token annotation. Eat the '>' if present.
903 if (Tok.is(tok::greater))
908 Tok.setKind(tok::annot_typename);
909 setTypeAnnotation(Tok, Type.get());
911 Tok.setLocation(SS.getBeginLoc());
912 else if (TemplateKWLoc.isValid())
913 Tok.setLocation(TemplateKWLoc);
915 Tok.setLocation(TemplateNameLoc);
917 // Build a template-id annotation token that can be processed
919 Tok.setKind(tok::annot_template_id);
920 TemplateIdAnnotation *TemplateId
921 = TemplateIdAnnotation::Allocate(TemplateArgs.size(), TemplateIds);
922 TemplateId->TemplateNameLoc = TemplateNameLoc;
923 if (TemplateName.getKind() == UnqualifiedId::IK_Identifier) {
924 TemplateId->Name = TemplateName.Identifier;
925 TemplateId->Operator = OO_None;
927 TemplateId->Name = 0;
928 TemplateId->Operator = TemplateName.OperatorFunctionId.Operator;
931 TemplateId->TemplateKWLoc = TemplateKWLoc;
932 TemplateId->Template = Template;
933 TemplateId->Kind = TNK;
934 TemplateId->LAngleLoc = LAngleLoc;
935 TemplateId->RAngleLoc = RAngleLoc;
936 ParsedTemplateArgument *Args = TemplateId->getTemplateArgs();
937 for (unsigned Arg = 0, ArgEnd = TemplateArgs.size(); Arg != ArgEnd; ++Arg)
938 Args[Arg] = ParsedTemplateArgument(TemplateArgs[Arg]);
939 Tok.setAnnotationValue(TemplateId);
940 if (TemplateKWLoc.isValid())
941 Tok.setLocation(TemplateKWLoc);
943 Tok.setLocation(TemplateNameLoc);
946 // Common fields for the annotation token
947 Tok.setAnnotationEndLoc(RAngleLoc);
949 // In case the tokens were cached, have Preprocessor replace them with the
951 PP.AnnotateCachedTokens(Tok);
955 /// \brief Replaces a template-id annotation token with a type
956 /// annotation token.
958 /// If there was a failure when forming the type from the template-id,
959 /// a type annotation token will still be created, but will have a
960 /// NULL type pointer to signify an error.
961 void Parser::AnnotateTemplateIdTokenAsType() {
962 assert(Tok.is(tok::annot_template_id) && "Requires template-id tokens");
964 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
965 assert((TemplateId->Kind == TNK_Type_template ||
966 TemplateId->Kind == TNK_Dependent_template_name) &&
967 "Only works for type and dependent templates");
969 ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
970 TemplateId->NumArgs);
973 = Actions.ActOnTemplateIdType(TemplateId->SS,
974 TemplateId->TemplateKWLoc,
975 TemplateId->Template,
976 TemplateId->TemplateNameLoc,
977 TemplateId->LAngleLoc,
979 TemplateId->RAngleLoc);
980 // Create the new "type" annotation token.
981 Tok.setKind(tok::annot_typename);
982 setTypeAnnotation(Tok, Type.isInvalid() ? ParsedType() : Type.get());
983 if (TemplateId->SS.isNotEmpty()) // it was a C++ qualified type name.
984 Tok.setLocation(TemplateId->SS.getBeginLoc());
985 // End location stays the same
987 // Replace the template-id annotation token, and possible the scope-specifier
988 // that precedes it, with the typename annotation token.
989 PP.AnnotateCachedTokens(Tok);
992 /// \brief Determine whether the given token can end a template argument.
993 static bool isEndOfTemplateArgument(Token Tok) {
994 return Tok.is(tok::comma) || Tok.is(tok::greater) ||
995 Tok.is(tok::greatergreater);
998 /// \brief Parse a C++ template template argument.
999 ParsedTemplateArgument Parser::ParseTemplateTemplateArgument() {
1000 if (!Tok.is(tok::identifier) && !Tok.is(tok::coloncolon) &&
1001 !Tok.is(tok::annot_cxxscope))
1002 return ParsedTemplateArgument();
1004 // C++0x [temp.arg.template]p1:
1005 // A template-argument for a template template-parameter shall be the name
1006 // of a class template or an alias template, expressed as id-expression.
1008 // We parse an id-expression that refers to a class template or alias
1009 // template. The grammar we parse is:
1011 // nested-name-specifier[opt] template[opt] identifier ...[opt]
1013 // followed by a token that terminates a template argument, such as ',',
1014 // '>', or (in some cases) '>>'.
1015 CXXScopeSpec SS; // nested-name-specifier, if present
1016 ParseOptionalCXXScopeSpecifier(SS, ParsedType(),
1017 /*EnteringContext=*/false);
1019 ParsedTemplateArgument Result;
1020 SourceLocation EllipsisLoc;
1021 if (SS.isSet() && Tok.is(tok::kw_template)) {
1022 // Parse the optional 'template' keyword following the
1023 // nested-name-specifier.
1024 SourceLocation TemplateKWLoc = ConsumeToken();
1026 if (Tok.is(tok::identifier)) {
1027 // We appear to have a dependent template name.
1029 Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1030 ConsumeToken(); // the identifier
1032 // Parse the ellipsis.
1033 if (Tok.is(tok::ellipsis))
1034 EllipsisLoc = ConsumeToken();
1036 // If the next token signals the end of a template argument,
1037 // then we have a dependent template name that could be a template
1038 // template argument.
1039 TemplateTy Template;
1040 if (isEndOfTemplateArgument(Tok) &&
1041 Actions.ActOnDependentTemplateName(getCurScope(),
1042 SS, TemplateKWLoc, Name,
1043 /*ObjectType=*/ ParsedType(),
1044 /*EnteringContext=*/false,
1046 Result = ParsedTemplateArgument(SS, Template, Name.StartLocation);
1048 } else if (Tok.is(tok::identifier)) {
1049 // We may have a (non-dependent) template name.
1050 TemplateTy Template;
1052 Name.setIdentifier(Tok.getIdentifierInfo(), Tok.getLocation());
1053 ConsumeToken(); // the identifier
1055 // Parse the ellipsis.
1056 if (Tok.is(tok::ellipsis))
1057 EllipsisLoc = ConsumeToken();
1059 if (isEndOfTemplateArgument(Tok)) {
1060 bool MemberOfUnknownSpecialization;
1061 TemplateNameKind TNK = Actions.isTemplateName(getCurScope(), SS,
1062 /*hasTemplateKeyword=*/false,
1064 /*ObjectType=*/ ParsedType(),
1065 /*EnteringContext=*/false,
1067 MemberOfUnknownSpecialization);
1068 if (TNK == TNK_Dependent_template_name || TNK == TNK_Type_template) {
1069 // We have an id-expression that refers to a class template or
1070 // (C++0x) alias template.
1071 Result = ParsedTemplateArgument(SS, Template, Name.StartLocation);
1076 // If this is a pack expansion, build it as such.
1077 if (EllipsisLoc.isValid() && !Result.isInvalid())
1078 Result = Actions.ActOnPackExpansion(Result, EllipsisLoc);
1083 /// ParseTemplateArgument - Parse a C++ template argument (C++ [temp.names]).
1085 /// template-argument: [C++ 14.2]
1086 /// constant-expression
1089 ParsedTemplateArgument Parser::ParseTemplateArgument() {
1090 // C++ [temp.arg]p2:
1091 // In a template-argument, an ambiguity between a type-id and an
1092 // expression is resolved to a type-id, regardless of the form of
1093 // the corresponding template-parameter.
1095 // Therefore, we initially try to parse a type-id.
1096 if (isCXXTypeId(TypeIdAsTemplateArgument)) {
1097 SourceLocation Loc = Tok.getLocation();
1098 TypeResult TypeArg = ParseTypeName(/*Range=*/0,
1099 Declarator::TemplateTypeArgContext);
1100 if (TypeArg.isInvalid())
1101 return ParsedTemplateArgument();
1103 return ParsedTemplateArgument(ParsedTemplateArgument::Type,
1104 TypeArg.get().getAsOpaquePtr(),
1108 // Try to parse a template template argument.
1110 TentativeParsingAction TPA(*this);
1112 ParsedTemplateArgument TemplateTemplateArgument
1113 = ParseTemplateTemplateArgument();
1114 if (!TemplateTemplateArgument.isInvalid()) {
1116 return TemplateTemplateArgument;
1119 // Revert this tentative parse to parse a non-type template argument.
1123 // Parse a non-type template argument.
1124 SourceLocation Loc = Tok.getLocation();
1125 ExprResult ExprArg = ParseConstantExpression(MaybeTypeCast);
1126 if (ExprArg.isInvalid() || !ExprArg.get())
1127 return ParsedTemplateArgument();
1129 return ParsedTemplateArgument(ParsedTemplateArgument::NonType,
1130 ExprArg.release(), Loc);
1133 /// \brief Determine whether the current tokens can only be parsed as a
1134 /// template argument list (starting with the '<') and never as a '<'
1136 bool Parser::IsTemplateArgumentList(unsigned Skip) {
1137 struct AlwaysRevertAction : TentativeParsingAction {
1138 AlwaysRevertAction(Parser &P) : TentativeParsingAction(P) { }
1139 ~AlwaysRevertAction() { Revert(); }
1148 if (!Tok.is(tok::less))
1152 // An empty template argument list.
1153 if (Tok.is(tok::greater))
1156 // See whether we have declaration specifiers, which indicate a type.
1157 while (isCXXDeclarationSpecifier() == TPResult::True())
1160 // If we have a '>' or a ',' then this is a template argument list.
1161 return Tok.is(tok::greater) || Tok.is(tok::comma);
1164 /// ParseTemplateArgumentList - Parse a C++ template-argument-list
1165 /// (C++ [temp.names]). Returns true if there was an error.
1167 /// template-argument-list: [C++ 14.2]
1168 /// template-argument
1169 /// template-argument-list ',' template-argument
1171 Parser::ParseTemplateArgumentList(TemplateArgList &TemplateArgs) {
1173 ParsedTemplateArgument Arg = ParseTemplateArgument();
1174 if (Tok.is(tok::ellipsis)) {
1175 SourceLocation EllipsisLoc = ConsumeToken();
1176 Arg = Actions.ActOnPackExpansion(Arg, EllipsisLoc);
1179 if (Arg.isInvalid()) {
1180 SkipUntil(tok::comma, tok::greater, true, true);
1184 // Save this template argument.
1185 TemplateArgs.push_back(Arg);
1187 // If the next token is a comma, consume it and keep reading
1189 if (Tok.isNot(tok::comma)) break;
1191 // Consume the comma.
1198 /// \brief Parse a C++ explicit template instantiation
1199 /// (C++ [temp.explicit]).
1201 /// explicit-instantiation:
1202 /// 'extern' [opt] 'template' declaration
1204 /// Note that the 'extern' is a GNU extension and C++0x feature.
1205 Decl *Parser::ParseExplicitInstantiation(unsigned Context,
1206 SourceLocation ExternLoc,
1207 SourceLocation TemplateLoc,
1208 SourceLocation &DeclEnd,
1209 AccessSpecifier AS) {
1210 // This isn't really required here.
1211 ParsingDeclRAIIObject
1212 ParsingTemplateParams(*this, ParsingDeclRAIIObject::NoParent);
1214 return ParseSingleDeclarationAfterTemplate(Context,
1215 ParsedTemplateInfo(ExternLoc,
1217 ParsingTemplateParams,
1221 SourceRange Parser::ParsedTemplateInfo::getSourceRange() const {
1223 return getTemplateParamsRange(TemplateParams->data(),
1224 TemplateParams->size());
1226 SourceRange R(TemplateLoc);
1227 if (ExternLoc.isValid())
1228 R.setBegin(ExternLoc);
1232 void Parser::LateTemplateParserCallback(void *P, const FunctionDecl *FD) {
1233 ((Parser*)P)->LateTemplateParser(FD);
1237 void Parser::LateTemplateParser(const FunctionDecl *FD) {
1238 LateParsedTemplatedFunction *LPT = LateParsedTemplateMap[FD];
1240 ParseLateTemplatedFuncDef(*LPT);
1244 llvm_unreachable("Late templated function without associated lexed tokens");
1247 /// \brief Late parse a C++ function template in Microsoft mode.
1248 void Parser::ParseLateTemplatedFuncDef(LateParsedTemplatedFunction &LMT) {
1252 // Get the FunctionDecl.
1253 FunctionDecl *FD = 0;
1254 if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(LMT.D))
1255 FD = FunTmpl->getTemplatedDecl();
1257 FD = cast<FunctionDecl>(LMT.D);
1259 // To restore the context after late parsing.
1260 Sema::ContextRAII GlobalSavedContext(Actions, Actions.CurContext);
1262 SmallVector<ParseScope*, 4> TemplateParamScopeStack;
1263 DeclaratorDecl* Declarator = dyn_cast<DeclaratorDecl>(FD);
1264 if (Declarator && Declarator->getNumTemplateParameterLists() != 0) {
1265 TemplateParamScopeStack.push_back(new ParseScope(this, Scope::TemplateParamScope));
1266 Actions.ActOnReenterDeclaratorTemplateScope(getCurScope(), Declarator);
1267 Actions.ActOnReenterTemplateScope(getCurScope(), LMT.D);
1269 // Get the list of DeclContext to reenter.
1270 SmallVector<DeclContext*, 4> DeclContextToReenter;
1271 DeclContext *DD = FD->getLexicalParent();
1272 while (DD && !DD->isTranslationUnit()) {
1273 DeclContextToReenter.push_back(DD);
1274 DD = DD->getLexicalParent();
1277 // Reenter template scopes from outmost to innermost.
1278 SmallVector<DeclContext*, 4>::reverse_iterator II =
1279 DeclContextToReenter.rbegin();
1280 for (; II != DeclContextToReenter.rend(); ++II) {
1281 if (ClassTemplatePartialSpecializationDecl* MD =
1282 dyn_cast_or_null<ClassTemplatePartialSpecializationDecl>(*II)) {
1283 TemplateParamScopeStack.push_back(new ParseScope(this,
1284 Scope::TemplateParamScope));
1285 Actions.ActOnReenterTemplateScope(getCurScope(), MD);
1286 } else if (CXXRecordDecl* MD = dyn_cast_or_null<CXXRecordDecl>(*II)) {
1287 TemplateParamScopeStack.push_back(new ParseScope(this,
1288 Scope::TemplateParamScope,
1289 MD->getDescribedClassTemplate() != 0 ));
1290 Actions.ActOnReenterTemplateScope(getCurScope(),
1291 MD->getDescribedClassTemplate());
1293 TemplateParamScopeStack.push_back(new ParseScope(this, Scope::DeclScope));
1294 Actions.PushDeclContext(Actions.getCurScope(), *II);
1296 TemplateParamScopeStack.push_back(new ParseScope(this,
1297 Scope::TemplateParamScope));
1298 Actions.ActOnReenterTemplateScope(getCurScope(), LMT.D);
1301 assert(!LMT.Toks.empty() && "Empty body!");
1303 // Append the current token at the end of the new token stream so that it
1304 // doesn't get lost.
1305 LMT.Toks.push_back(Tok);
1306 PP.EnterTokenStream(LMT.Toks.data(), LMT.Toks.size(), true, false);
1308 // Consume the previously pushed token.
1310 assert((Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try))
1311 && "Inline method not starting with '{', ':' or 'try'");
1313 // Parse the method body. Function body parsing code is similar enough
1314 // to be re-used for method bodies as well.
1315 ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope);
1317 // Recreate the containing function DeclContext.
1318 Sema::ContextRAII FunctionSavedContext(Actions, Actions.getContainingDC(FD));
1320 if (FunctionTemplateDecl *FunctionTemplate
1321 = dyn_cast_or_null<FunctionTemplateDecl>(LMT.D))
1322 Actions.ActOnStartOfFunctionDef(getCurScope(),
1323 FunctionTemplate->getTemplatedDecl());
1324 if (FunctionDecl *Function = dyn_cast_or_null<FunctionDecl>(LMT.D))
1325 Actions.ActOnStartOfFunctionDef(getCurScope(), Function);
1328 if (Tok.is(tok::kw_try)) {
1329 ParseFunctionTryBlock(LMT.D, FnScope);
1331 if (Tok.is(tok::colon))
1332 ParseConstructorInitializer(LMT.D);
1334 Actions.ActOnDefaultCtorInitializers(LMT.D);
1336 if (Tok.is(tok::l_brace)) {
1337 ParseFunctionStatementBody(LMT.D, FnScope);
1338 Actions.MarkAsLateParsedTemplate(FD, false);
1340 Actions.ActOnFinishFunctionBody(LMT.D, 0);
1345 SmallVector<ParseScope*, 4>::reverse_iterator I =
1346 TemplateParamScopeStack.rbegin();
1347 for (; I != TemplateParamScopeStack.rend(); ++I)
1350 DeclGroupPtrTy grp = Actions.ConvertDeclToDeclGroup(LMT.D);
1352 Actions.getASTConsumer().HandleTopLevelDecl(grp.get());
1355 /// \brief Lex a delayed template function for late parsing.
1356 void Parser::LexTemplateFunctionForLateParsing(CachedTokens &Toks) {
1357 tok::TokenKind kind = Tok.getKind();
1358 if (!ConsumeAndStoreFunctionPrologue(Toks)) {
1359 // Consume everything up to (and including) the matching right brace.
1360 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);
1363 // If we're in a function-try-block, we need to store all the catch blocks.
1364 if (kind == tok::kw_try) {
1365 while (Tok.is(tok::kw_catch)) {
1366 ConsumeAndStoreUntil(tok::l_brace, Toks, /*StopAtSemi=*/false);
1367 ConsumeAndStoreUntil(tok::r_brace, Toks, /*StopAtSemi=*/false);