obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 50 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/cpp0x/variadic-mem_fn.C b/gcc/testsuite/g++.dg/cpp0x/variadic-mem_fn.C
new file mode 100644
index 000000000..51c5c79ef
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/variadic-mem_fn.C
@@ -0,0 +1,50 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-do run }
+// A basic implementation of TR1's mem_fn using variadic teplates
+// Contributed by Douglas Gregor <doug.gregor@gmail.com>
+#include <cassert>
+
+template<typename R, typename Class, typename... Args>
+class Mem_fn
+{
+ public:
+  explicit Mem_fn(R (Class::*pmf)(Args...)) : pmf(pmf) { }
+
+  R operator()(Class& object, Args... args)
+  {
+    return (object.*pmf)(args...);
+  }
+
+  R operator()(Class* object, Args... args)
+  {
+    return (object->*pmf)(args...);
+  }
+
+  R (Class::*pmf)(Args...);
+};
+
+template<typename R, typename Class, typename... Args>  
+inline Mem_fn<R, Class, Args...>
+mem_fn(R (Class::* pmf)(Args...))
+{
+  return Mem_fn<R, Class, Args...>(pmf);
+}
+
+class X {
+ public:
+  int negate(int x) { return -x; }
+  int plus(int x, int y) { return x + y; }
+};
+
+int main()
+{
+  X x;
+  X* xp = &x;
+
+  assert(mem_fn(&X::negate)(x, 17) == -17);
+  assert(mem_fn(&X::negate)(xp, 17) == -17);
+  assert(mem_fn(&X::plus)(x, 17, 25) == 42);
+  assert(mem_fn(&X::plus)(xp, 17, 25) == 42);
+
+  return 0;
+}