From c06ddfb05866c4cc5b058976a9c0e8b27c045e9b Mon Sep 17 00:00:00 2001
From: Alex Lorenz <arphaman@gmail.com>
Date: Mon, 15 May 2017 10:56:31 +0000
Subject: [PATCH] [index] Visit and store information about namespace alias
 declarations

rdar://32195226


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@303048 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Index/IndexDecl.cpp          | 8 ++++++++
 test/Index/Core/index-source.cpp | 7 +++++++
 2 files changed, 15 insertions(+)

diff --git a/lib/Index/IndexDecl.cpp b/lib/Index/IndexDecl.cpp
index e55dea8e77..203862c46e 100644
--- a/lib/Index/IndexDecl.cpp
+++ b/lib/Index/IndexDecl.cpp
@@ -544,6 +544,14 @@ public:
     return true;
   }
 
+  bool VisitNamespaceAliasDecl(const NamespaceAliasDecl *D) {
+    TRY_DECL(D, IndexCtx.handleDecl(D));
+    IndexCtx.indexNestedNameSpecifierLoc(D->getQualifierLoc(), D);
+    IndexCtx.handleReference(D->getAliasedNamespace(), D->getTargetNameLoc(), D,
+                             D->getLexicalDeclContext());
+    return true;
+  }
+
   bool VisitUsingDecl(const UsingDecl *D) {
     const DeclContext *DC = D->getDeclContext()->getRedeclContext();
     const NamedDecl *Parent = dyn_cast<NamedDecl>(DC);
diff --git a/test/Index/Core/index-source.cpp b/test/Index/Core/index-source.cpp
index 48ca3a9b57..9248e86ff6 100644
--- a/test/Index/Core/index-source.cpp
+++ b/test/Index/Core/index-source.cpp
@@ -323,8 +323,15 @@ void func();
 
 }
 namespace innerAlias = inner;
+// CHECK: [[@LINE-1]]:11 | namespace-alias/C++ | innerAlias | c:@N@ns@NA@innerAlias | <no-cgname> | Decl,RelChild | rel: 1
+// CHECK: [[@LINE-2]]:24 | namespace/C++ | inner | c:@N@ns@N@inner | <no-cgname> | Ref,RelCont | rel: 1
 }
 
+namespace namespaceAlias = ::ns::innerAlias;
+// CHECK: [[@LINE-1]]:11 | namespace-alias/C++ | namespaceAlias | c:@NA@namespaceAlias | <no-cgname> | Decl | rel: 0
+// CHECK: [[@LINE-2]]:30 | namespace/C++ | ns | c:@N@ns | <no-cgname> | Ref,RelCont | rel: 1
+// CHECK: [[@LINE-3]]:34 | namespace-alias/C++ | innerAlias | c:@N@ns@NA@innerAlias | <no-cgname> | Ref,RelCont | rel: 1
+
 void ::ns::inner::func() {
 // CHECK: [[@LINE-1]]:8 | namespace/C++ | ns | c:@N@ns | <no-cgname> | Ref,RelCont | rel: 1
 // CHECK: [[@LINE-2]]:12 | namespace/C++ | inner | c:@N@ns@N@inner | <no-cgname> | Ref,RelCont | rel: 1
-- 
2.40.0