re PR c++/65195 (Variable template cannot be used as a function)

	PR c++/65195
	PR c++/66619
	* semantics.c (finish_id_expression): Call convert_from_reference
	for variable template.

From-SVN: r226641

gcc/cp/ChangeLog

+2015-08-05  Jason Merrill  <jason@redhat.com>
+
+	PR c++/65195
+	PR c++/66619
+	* semantics.c (finish_id_expression): Call convert_from_reference
+	for variable template.
+
 2015-08-04  Jason Merrill  <jason@redhat.com>
 
 	* pt.c (lookup_template_class_1): Clear elt.spec.

gcc/cp/semantics.c

@@ -3564,6 +3564,7 @@ finish_id_expression (tree id_expression,
 	{
 	  decl = finish_template_variable (decl);
 	  mark_used (decl);
+	  decl = convert_from_reference (decl);
 	}
       else if (scope)
 	{

gcc/testsuite/g++.dg/cpp1y/var-templ37.C

+// PR c++/65195
+// { dg-do compile { target c++14 } }
+
+template<typename T>
+T constant {};
+
+template<typename T>
+struct foo {
+    int operator()() const
+    { return 3; }
+};
+
+template<typename T>
+auto& f = constant<foo<T>>;
+
+int main()
+{
+    // fine
+    auto& ref = f<int>; ref();
+
+    // error: f<int> cannot be used as a function
+    f<int>();
+}

gcc/testsuite/g++.dg/cpp1y/var-templ40.C

+// PR c++/66619
+// { dg-do compile { target c++14 } }
+
+int y;
+template<class T> T val1 = y;
+auto&& x1 = val1<int&>;
+
+template<class T> T val2 = 0;
+auto&& x2 = val2<int&&>;