From 66b6f8183375ed545ef884192be4acef7500f7e9 Mon Sep 17 00:00:00 2001
From: Sean Callanan <scallanan@apple.com>
Date: Wed, 10 Dec 2014 00:00:37 +0000
Subject: [PATCH] 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.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@223860 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/AST/ASTImporter.cpp | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/lib/AST/ASTImporter.cpp b/lib/AST/ASTImporter.cpp
index 07b2a73ee8..88e5a41e60 100644
--- a/lib/AST/ASTImporter.cpp
+++ b/lib/AST/ASTImporter.cpp
@@ -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::VisitObjCProtocolDecl(ObjCProtocolDecl *D) {
   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(),
+                                                           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) {
-- 
2.40.0