1 files changed, 35 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/template/sfinae4.C b/gcc/testsuite/g++.dg/template/sfinae4.C
new file mode 100644
index 000000000..a9650511e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/sfinae4.C
@@ -0,0 +1,35 @@
+// DR 339
+//
+// Test of the use of free functions with SFINAE
+void foo(int) { }
+template<typename T> void foo(T*) { }
+
+typedef char yes_type;
+struct no_type { char data[2]; };
+
+template<typename T> T create_a();
+
+template<bool, typename T = void> struct enable_if { typedef T type; };
+template<typename T> struct enable_if<false, T> { };
+
+template<typename T> 
+  typename enable_if<(sizeof(foo(create_a<T const&>()), 1) > 0),
+		     yes_type>::type
+  check_has_foo(const volatile T&);
+
+no_type check_has_foo(...);
+
+template<typename T>
+struct has_foo
+{
+  static const bool value = 
+    (sizeof(check_has_foo(create_a<T const&>())) == sizeof(yes_type));
+};
+
+struct X { };
+
+int a1[has_foo<int>::value? 1 : -1];
+int a2[has_foo<long>::value? 1 : -1];
+int a3[has_foo<int*>::value? 1 : -1];
+int a4[has_foo<X>::value? -1 : 1];
+int a5[has_foo<int X::*>::value? -1 : 1];