re PR c++/51878 (ICE or OOM with decltype + variadic templates + "indirect" function call)

2012-10-11  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/51878
	* g++.dg/cpp0x/decltype45.C: New.

From-SVN: r192381

gcc/testsuite/ChangeLog

+2012-10-11  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/51878
+	* g++.dg/cpp0x/decltype45.C: New.
+
 2012-10-11  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/54784

gcc/testsuite/g++.dg/cpp0x/decltype45.C

+// PR c++/51878
+// { dg-do compile { target c++11 } }
+
+template<class F, class... T>
+auto indirect_call(F f, T... t) -> decltype(f(t...))
+{
+  return f(t...);
+}
+
+template<class F, class T>
+struct VariadicBind
+{
+  F f;
+  T t;
+
+  template<class... A>
+  auto operator()(A... a) -> decltype(indirect_call(f, t, a...))
+  {
+    return indirect_call(f, t, a...);
+  }
+};
+
+template<class F>
+void apply(F f)
+{
+  f();
+}
+
+template<class F, class V1, class... V>
+void apply(F f, V1 v1, V... v)
+{
+  apply(VariadicBind<F, int>{f, v1}, v...);
+}
+
+void func(int, int) { }
+
+int main()
+{
+  apply(func, 0, 0);
+}