re PR c++/83895 (-Wparentheses warns about pointer-to-member typedefs)

PR c++/83895

cp/

* decl.c (grokdeclarator): Don't diagnose extra parens
on typedefs.

testsuite/

* g++.dg/warn/83895.C: New.

From-SVN: r256942

gcc/cp/ChangeLog

+2018-01-22  Ville Voutilainen  <ville.voutilainen@gmail.com>
+
+	PR c++/83895
+
+	* decl.c (grokdeclarator): Don't diagnose extra parens
+	on typedefs.
+
 2018-01-19  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/81167

gcc/cp/decl.c

@@ -10882,6 +10882,7 @@ grokdeclarator (const cp_declarator *declarator,
 	 to be a constructor call.  */
       if (decl_context != PARM
 	  && decl_context != TYPENAME
+	  && !typedef_p
 	  && declarator->parenthesized != UNKNOWN_LOCATION
 	  /* If the type is class-like and the inner name used a
 	     global namespace qualifier, we need the parens.

gcc/testsuite/g++.dg/warn/83895.C

+// { dg-additional-options -Wparentheses }
+// { dg-do compile { target c++11 } }
+
+struct X;
+
+typedef int (X::*foo);
+using bar = int (X::*);