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, 68 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/cpp0x/template_deduction.C b/gcc/testsuite/g++.dg/cpp0x/template_deduction.C
new file mode 100644
index 000000000..c1eace6fa
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/template_deduction.C
@@ -0,0 +1,68 @@
+// I, Howard Hinnant, hereby place this code in the public domain.
+
+// Test the "Augmented" template argument deduction when binding an lvalue to an rvalue reference.
+
+// { dg-do compile }
+// { dg-options "-std=c++0x" }
+
+template <bool> struct sa;
+template <> struct sa<true> {};
+
+template <class T, T v>
+struct integral_constant
+{
+	static const T                  value = v;
+	typedef T                       value_type;
+	typedef integral_constant<T, v> type;
+};
+
+typedef integral_constant<bool, true>  true_type;
+typedef integral_constant<bool, false> false_type;
+
+template <class T> struct is_lvalue_reference     : public integral_constant<bool, false> {};
+template <class T> struct is_lvalue_reference<T&> : public integral_constant<bool, true> {};
+
+template <class T> struct is_rvalue_reference      : public integral_constant<bool, false> {};
+template <class T> struct is_rvalue_reference<T&&> : public integral_constant<bool, true> {};
+
+template <bool is_lvalue_ref, bool is_rvalue_ref, class T>
+void
+test1(T&&)
+{
+    sa<is_lvalue_reference<T&&>::value == is_lvalue_ref> t1;
+    sa<is_rvalue_reference<T&&>::value == is_rvalue_ref> t2;
+}
+
+template <bool is_lvalue_ref, bool is_rvalue_ref, class T>
+void
+test2(const T&&)		// { dg-error "argument" }
+{
+    sa<is_lvalue_reference<const T&&>::value == is_lvalue_ref> t1;
+    sa<is_rvalue_reference<const T&&>::value == is_rvalue_ref> t2;
+}
+
+template <bool is_lvalue_ref, bool is_rvalue_ref, class T>
+void
+test3(T*&&)
+{
+    sa<is_lvalue_reference<T*&&>::value == is_lvalue_ref> t1;
+    sa<is_rvalue_reference<T*&&>::value == is_rvalue_ref> t2;
+}
+
+struct A {};
+
+A a;
+
+A source() {return A();}
+A* sourcep() {return 0;}
+
+int main()
+{
+    test1<true, false>(a);
+    test1<false, true>(source());
+    test2<false, true>(a);	// { dg-error "lvalue" }
+    test2<false, true>(source());
+    test3<false, true>(&a);
+    test3<false, true>(sourcep());
+    return 0;
+}