re PR c++/58932 ([C++11] Deleted functions and SFINAE in partial template specializations)

/cp
2013-10-31  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/58932
	Revert:
	2013-10-18  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/58466
	* pt.c (most_specialized_class): Bump processing_template_decl for
	get_class_bindings.

/testsuite
2013-10-31  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/58932
	Revert:
	2013-10-18  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/58466
	* g++.dg/cpp0x/variadic145.C: New.

	* g++.dg/cpp0x/sfinae49.C: New.

From-SVN: r204252

gcc/testsuite/g++.dg/cpp0x/sfinae49.C

+// PR c++/58932
+// { dg-do compile { target c++11 } }
+
+using nullptr_t = decltype(nullptr);
+
+template<typename T, typename Sfinae = nullptr_t>
+struct B {
+    static float& int_if_addable();
+};
+
+template<typename T>
+struct B<T, decltype( (T() + T()), nullptr )> {
+    static int& int_if_addable();
+};
+
+struct X { };
+
+struct Y { };
+Y operator+(Y, Y);
+
+struct Z { };
+Z operator+(Z, Z) = delete;
+
+int main()
+{
+  float& a = B<X>::int_if_addable();
+  int& b = B<Y>::int_if_addable();
+  float& c = B<Z>::int_if_addable();
+}