re PR c++/59766 (c++1y: declaring friend function with 'auto' return type…

re PR c++/59766 (c++1y: declaring friend function with 'auto' return type deduction is rejected with bogus reason)

	PR c++/59766
	* decl.c (grokdeclarator): Do not flag friends with deduced return.

From-SVN: r222095

gcc/cp/ChangeLog

+2015-04-14  David Krauss  <david_work@me.com>
+
+	PR c++/59766
+	* decl.c (grokdeclarator): Do not flag friends with deduced return.
+
 2015-04-14  Momchil Velikov  <momchil.velikov@gmail.com>
 	    Jason Merrill  <jason@redhat.com>
 

gcc/cp/decl.c

@@ -10628,7 +10628,7 @@ grokdeclarator (const cp_declarator *declarator,
       }
     else if (decl_context == FIELD)
       {
-	if (!staticp && TREE_CODE (type) != METHOD_TYPE
+	if (!staticp && !friendp && TREE_CODE (type) != METHOD_TYPE
 	    && type_uses_auto (type))
 	  {
 	    error ("non-static data member declared %<auto%>");

gcc/testsuite/g++.dg/cpp1y/auto-fn26.C

+// PR c++/59766
+// { dg-do compile { target c++14 } }
+
+struct T {
+  friend auto f() { }
+};