[clang-tidy] Fix an unused-using-decl false positive about template arguments in

function call expression.

Summary:
The check doesn't mark the template argument as used when the template
argument is a template.

Reviewers: djasper, alexfh

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D22803

llvm-svn: 277444

1 files changed, 20 insertions, 1 deletions

diff --git a/clang-tools-extra/test/clang-tidy/misc-unused-using-decls.cpp b/clang-tools-extra/test/clang-tidy/misc-unused-using-decls.cpp
index 618a9f661f9..fec49496c2b 100644
--- a/clang-tools-extra/test/clang-tidy/misc-unused-using-decls.cpp
+++ b/clang-tools-extra/test/clang-tidy/misc-unused-using-decls.cpp
@@ -1,4 +1,5 @@
-// RUN: %check_clang_tidy %s misc-unused-using-decls %t -- -- -fno-delayed-template-parsing
+// RUN: %check_clang_tidy %s misc-unused-using-decls %t -- -- -fno-delayed-template-parsing -isystem %S/Inputs/
+
 
 // ----- Definitions -----
 template <typename T> class vector {};
@@ -54,6 +55,16 @@ enum Color4 { Blue };
 
 }  // namespace n
 
+#include "unused-using-decls.h"
+namespace ns {
+template <typename T>
+class AA {
+  T t;
+};
+template <typename T>
+T ff() { T t; return t; }
+} // namespace ns
+
 // ----- Using declarations -----
 // eol-comments aren't removed (yet)
 using n::A; // A
@@ -136,6 +147,9 @@ using n::Color2;
 using n::Color3;
 using n::Blue;
 
+using ns::AA;
+using ns::ff;
+
 // ----- Usages -----
 void f(B b);
 void g() {
@@ -151,4 +165,9 @@ void g() {
   Color2 color2;
   int t1 = Color3::Yellow;
   int t2 = Blue;
+
+  MyClass a;
+  int t3 = 0;
+  a.func1<AA>(&t3);
+  a.func2<int, ff>(t3);
 }