re PR libstdc++/49058 ([C++0x] Bind no-arguments functor failed using std::bind…

re PR libstdc++/49058 ([C++0x] Bind no-arguments functor failed using std::bind with -pedantic option.)

	PR c++/49058
	* call.c (splice_viable): Be strict in templates.

From-SVN: r174073

gcc/cp/ChangeLog

 2011-05-23  Jason Merrill  <jason@redhat.com>
 
+	PR c++/49058
+	* call.c (splice_viable): Be strict in templates.
+
 	PR c++/47336
 	* error.c (dump_template_bindings): Suppress access control.
 

gcc/cp/call.c

@@ -3009,6 +3009,11 @@ splice_viable (struct z_candidate *cands,
   struct z_candidate **last_viable;
   struct z_candidate **cand;
 
+  /* Be strict inside templates, since build_over_call won't actually
+     do the conversions to get pedwarns.  */
+  if (processing_template_decl)
+    strict_p = true;
+
   viable = NULL;
   last_viable = &viable;
   *any_viable_p = false;

gcc/testsuite/ChangeLog

 2011-05-23  Jason Merrill  <jason@redhat.com>
 
+	* g++.dg/cpp0x/sfinae24.C: New.
+
 	* g++.dg/cpp0x/error3.C: New.
 
 	* g++.dg/cpp0x/defaulted27.C: New.

gcc/testsuite/g++.dg/cpp0x/sfinae24.C

+// PR c++/49058
+// This error is not subject to SFINAE because it doesn't happen in the
+// deduction context.
+// { dg-options -std=c++0x }
+// { dg-prune-output "note" }
+
+template<typename T> T val();
+
+struct F1
+{
+    void operator()();
+};
+
+template<typename F>
+struct Bind
+{
+    template<typename R
+      = decltype( val<F>()( ) )>
+    R f();
+
+    template<typename R
+      = decltype( val<const F>()( ) )>
+    R f() const;		// { dg-error "no match" }
+};
+
+int main()
+{
+  Bind<F1> b;
+}