re PR c++/56071 (friend class template cannot access private constructor in…

re PR c++/56071 (friend class template cannot access private constructor in exception-specification)

	PR c++/56071
	* pt.c (maybe_instantiate_noexcept): Don't defer access checks.

From-SVN: r195378

gcc/cp/ChangeLog

+2013-01-22  Jason Merrill  <jason@redhat.com>
+
+	PR c++/56071
+	* pt.c (maybe_instantiate_noexcept): Don't defer access checks.
+
 2013-01-22  Dodji Seketeli  <dodji@redhat.com>
 
 	PR c++/53609

gcc/cp/pt.c

@@ -18429,12 +18429,14 @@ maybe_instantiate_noexcept (tree fn)
       if (push_tinst_level (fn))
 	{
 	  push_access_scope (fn);
+	  push_deferring_access_checks (dk_no_deferred);
 	  input_location = DECL_SOURCE_LOCATION (fn);
 	  noex = tsubst_copy_and_build (DEFERRED_NOEXCEPT_PATTERN (noex),
 					DEFERRED_NOEXCEPT_ARGS (noex),
 					tf_warning_or_error, fn,
 					/*function_p=*/false,
 					/*integral_constant_expression_p=*/true);
+	  pop_deferring_access_checks ();
 	  pop_access_scope (fn);
 	  pop_tinst_level ();
 	  spec = build_noexcept_spec (noex, tf_warning_or_error);

gcc/testsuite/g++.dg/cpp0x/noexcept20.C

+// PR c++/56071
+// { dg-options -std=c++11 }
+
+class B
+{
+  template <typename T> friend struct A;
+  B() {}
+};
+
+template <typename T>
+struct A
+{
+  A() noexcept(noexcept(B())) { }
+};
+
+struct C
+{
+  C()
+  {
+    static_assert( !noexcept(A<int>()), "" );
+  }
+};