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
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 31 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/cpp0x/sfinae6.C b/gcc/testsuite/g++.dg/cpp0x/sfinae6.C
new file mode 100644
index 000000000..401d5362d
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/sfinae6.C
@@ -0,0 +1,31 @@
+// PR c++/48113
+// { dg-options -std=c++0x }
+
+template<typename T> T declval();
+
+struct tuple { };
+
+struct F1
+{
+    void operator()(tuple, int);
+};
+
+typedef void (*F2)(tuple, int);
+
+template<typename F, typename T>
+struct Bind
+{
+    template<typename A,
+             typename R = decltype( F()(declval<T&>(), A()) )>
+    R f(A);
+
+    template<typename A,
+             typename R = decltype( F()(declval<volatile T&>(), A()) )>
+    R f(A) volatile;
+};
+
+int main()
+{
+    Bind<F1, tuple>().f(0);  // OK
+    Bind<F2, tuple>().f(0);  // ERROR, should be OK
+}