[Index/DocComments] When cloning a full comment, pick the template parameters from the original FullComment,
if the parameters are not already set (e.g. because it is a typedef).
Fixes crash of rdar://16128173
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@207382 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ASTContext.cpp b/lib/AST/ASTContext.cpp
index 8a60beb..84abda2 100644
--- a/lib/AST/ASTContext.cpp
+++ b/lib/AST/ASTContext.cpp
@@ -422,6 +422,8 @@
ThisDeclInfo->IsFilled = false;
ThisDeclInfo->fill();
ThisDeclInfo->CommentDecl = FC->getDecl();
+ if (!ThisDeclInfo->TemplateParameters)
+ ThisDeclInfo->TemplateParameters = FC->getDeclInfo()->TemplateParameters;
comments::FullComment *CFC =
new (*this) comments::FullComment(FC->getBlocks(),
ThisDeclInfo);
diff --git a/test/Index/comment-cplus-template-decls.cpp b/test/Index/comment-cplus-template-decls.cpp
index 9510c7c..7ef09bd 100644
--- a/test/Index/comment-cplus-template-decls.cpp
+++ b/test/Index/comment-cplus-template-decls.cpp
@@ -67,3 +67,18 @@
template<template<template<typename CCC> class DDD, class BBB> class AAA>
void func_template_2();
// FIXME: There is not Declaration field in the generated output.
+
+namespace rdar16128173 {
+// CHECK: <Declaration>template <class PtrTy> class OpaquePtr {}</Declaration>
+
+/// \brief Wrapper for void* pointer.
+/// \tparam PtrTy Either a pointer type like 'T*' or a type that behaves like
+/// a pointer.
+template <class PtrTy>
+class OpaquePtr {};
+
+// CHECK: <Declaration>typedef OpaquePtr<int> DeclGroupPtrTy</Declaration>
+typedef OpaquePtr<int> DeclGroupPtrTy;
+
+DeclGroupPtrTy blah;
+}