use DISABLE_COPY_AND_ASSIGN in switch_thru_all_uis

In switch_thru_all_uis,  a pre-c++11 way of removing copy constructor
and assignment operator is used.

This patch uses the DISABLE_COPY_AND_ASSIGN macro which does the right
thing for pre and post c++11.

gdb/Changelog:

2021-01-19  Lancelot SIX  <lsix@lancelotsix.com>

	* top.h (switch_thru_all_uis): Use DISABLE_COPY_AND_ASSIGN.

1 files changed, 2 insertions, 5 deletions

diff --git a/gdb/top.h b/gdb/top.h
index a31b19a..f58bebb 100644
--- a/gdb/top.h
+++ b/gdb/top.h
@@ -173,6 +173,8 @@ public:
     current_ui = ui_list;
   }
 
+  DISABLE_COPY_AND_ASSIGN (switch_thru_all_uis);
+
   /* If done iterating, return true; otherwise return false.  */
   bool done () const
   {
@@ -190,11 +192,6 @@ public:
 
  private:
 
-  /* No need for these.  They are intentionally not defined
-     anywhere.  */
-  switch_thru_all_uis &operator= (const switch_thru_all_uis &);
-  switch_thru_all_uis (const switch_thru_all_uis &);
-
   /* Used to iterate through the UIs.  */
   struct ui *m_iter;