re PR c++/49458 ([C++0x][DR 1328] Obvious candidate for conversion to function lvalue rejected)

	PR c++/49458
	* call.c (convert_class_to_reference_1): Allow binding function
	lvalue to rvalue reference.

From-SVN: r175164

gcc/cp/ChangeLog

 2011-06-17  Jason Merrill  <jason@redhat.com>
 
+	PR c++/49458
+	* call.c (convert_class_to_reference_1): Allow binding function
+	lvalue to rvalue reference.
+
 	PR c++/43912
 	Generate proxy VAR_DECLs for better lambda debug info.
 	* cp-tree.h (FUNCTION_NEEDS_BODY_BLOCK): Add lambda operator().

gcc/cp/call.c

@@ -1362,6 +1362,8 @@ convert_class_to_reference_1 (tree reference_type, tree s, tree expr, int flags)
 
               /* Don't allow binding of lvalues to rvalue references.  */
               if (TYPE_REF_IS_RVALUE (reference_type)
+                  /* Function lvalues are OK, though.  */
+                  && TREE_CODE (TREE_TYPE (reference_type)) != FUNCTION_TYPE
                   && !TYPE_REF_IS_RVALUE (TREE_TYPE (TREE_TYPE (cand->fn))))
                 cand->second_conv->bad_p = true;
 	    }

gcc/testsuite/ChangeLog

 2011-06-17  Jason Merrill  <jason@redhat.com>
 
+	* g++.dg/cpp0x/rv-func2.C: New.
+
 	* g++.dg/debug/dwarf2/lambda1.C: New.
 	* g++.dg/warn/Wshadow-6.C: Adjust.
 

gcc/testsuite/g++.dg/cpp0x/rv-func2.C

+// PR c++/49458
+// { dg-options -std=c++0x }
+
+typedef void ftype();
+
+struct A {
+  operator ftype&(void);
+};
+
+ftype &&frvref = A();