r223860 - Updated the AST importer to support importing

[Nico Weber]

On Tue, Dec 9, 2014 at 4:00 PM, Sean Callanan <scallanan at apple.com> wrote:

> Author: spyffe
> Date: Tue Dec  9 18:00:37 2014
> New Revision: 223860
>
> URL: http://llvm.org/viewvc/llvm-project?rev=223860&view=rev
> Log:
> Updated the AST importer to support importing
> LinkageSpecDecls.  This is relevant when LLDB
> wants to import Decls from non-C++ modules,
> since many declarations are in extern "C"
> blocks.
>
> Modified:
>     cfe/trunk/lib/AST/ASTImporter.cpp
>
> Modified: cfe/trunk/lib/AST/ASTImporter.cpp
> URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/ASTImporter.cpp?rev=223860&r1=223859&r2=223860&view=diff
>
> ==============================================================================
> --- cfe/trunk/lib/AST/ASTImporter.cpp (original)
> +++ cfe/trunk/lib/AST/ASTImporter.cpp Tue Dec  9 18:00:37 2014
> @@ -151,6 +151,7 @@ namespace clang {
>      Decl *VisitObjCMethodDecl(ObjCMethodDecl *D);
>      Decl *VisitObjCCategoryDecl(ObjCCategoryDecl *D);
>      Decl *VisitObjCProtocolDecl(ObjCProtocolDecl *D);
> +    Decl *VisitLinkageSpecDecl(LinkageSpecDecl *D);
>      Decl *VisitObjCInterfaceDecl(ObjCInterfaceDecl *D);
>      Decl *VisitObjCCategoryImplDecl(ObjCCategoryImplDecl *D);
>      Decl *VisitObjCImplementationDecl(ObjCImplementationDecl *D);
> @@ -3470,6 +3471,35 @@ Decl *ASTNodeImporter::VisitObjCProtocol
>    return ToProto;
>  }
>
> +Decl *ASTNodeImporter::VisitLinkageSpecDecl(LinkageSpecDecl *D) {
> +  DeclContext *DC = Importer.ImportContext(D->getDeclContext());
> +  DeclContext *LexicalDC =
> Importer.ImportContext(D->getLexicalDeclContext());
> +
> +  SourceLocation ExternLoc = Importer.Import(D->getExternLoc());
> +  SourceLocation LangLoc = Importer.Import(D->getLocation());
> +
> +  bool HasBraces = D->hasBraces();
> +
> +  LinkageSpecDecl *ToLinkageSpec =
> LinkageSpecDecl::Create(Importer.getToContext(),
>

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> +                                                           DC,
> +                                                           ExternLoc,
> +                                                           LangLoc,
> +
>  D->getLanguage(),
> +                                                           HasBraces);
> +
> +  if (HasBraces) {
> +    SourceLocation RBraceLoc = Importer.Import(D->getRBraceLoc());
> +    ToLinkageSpec->setRBraceLoc(RBraceLoc);
> +  }
> +
> +  ToLinkageSpec->setLexicalDeclContext(LexicalDC);
> +  LexicalDC->addDeclInternal(ToLinkageSpec);
> +
> +  Importer.Imported(D, ToLinkageSpec);
> +
> +  return ToLinkageSpec;
> +}
> +
>  bool ASTNodeImporter::ImportDefinition(ObjCInterfaceDecl *From,
>                                         ObjCInterfaceDecl *To,
>                                         ImportDefinitionKind Kind) {
>
>
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