pt.c (tsubst_copy_and_build): Don't complain about unqualified lookup failing if…

pt.c (tsubst_copy_and_build): Don't complain about unqualified lookup failing if we're still in a template.

	* pt.c (tsubst_copy_and_build) [CALL_EXPR]: Don't complain about
	unqualified lookup failing if we're still in a template.

From-SVN: r172372

gcc/cp/ChangeLog

+2011-04-13  Jason Merrill  <jason@redhat.com>
+
+	PR c++/48581
+	* pt.c (tsubst_copy_and_build) [CALL_EXPR]: Don't complain about
+	unqualified lookup failing if we're still in a template.
+
 2011-04-12  Nathan Froyd  <froydnj@codesourcery.com>
 
 	* cp-lang.c (cp_init_ts): Call cp_common_init_ts.  Move

gcc/cp/pt.c

@@ -12938,7 +12938,8 @@ tsubst_copy_and_build (tree t,
 	    && !any_type_dependent_arguments_p (call_args))
 	  function = perform_koenig_lookup (function, call_args, false);
 
-	if (TREE_CODE (function) == IDENTIFIER_NODE)
+	if (TREE_CODE (function) == IDENTIFIER_NODE
+	    && !processing_template_decl)
 	  {
 	    unqualified_name_lookup_error (function);
 	    release_tree_vector (call_args);

gcc/testsuite/ChangeLog

+2011-04-13  Jason Merrill  <jason@redhat.com>
+
+	* g++.dg/cpp0x/sfinae13.C: New.
+
 2011-04-13  Uros Bizjak  <ubizjak@gmail.com>
 
 	* gcc.target/i386/sse2-init-v2di-2.c: Update scan pattern.

gcc/testsuite/g++.dg/cpp0x/sfinae13.C

+// PR c++/48581
+// { dg-options -std=c++0x }
+
+template<class T>
+T&& create();
+
+template<class T,
+  class = decltype(foo(create<T>()))
+>
+auto f(int) -> char;
+
+template<class>
+auto f(...) -> char (&)[2];
+
+struct S {};
+void foo(S);
+
+static_assert(sizeof(f<S>(0)) == 1, "Error"); // (#)
+
+int main() {}