Use nullptr, changed by clang-tidy

    * TAO/tao/Acceptor_Impl.cpp:
    * TAO/tao/Fixed_Array_Argument_T.cpp:
    * TAO/tao/ORB_Core.cpp:
    * TAO/tao/Object_T.cpp:
    * TAO/tao/Thread_Per_Connection_Handler.cpp:
    * TAO/tao/Transport_Cache_Manager_T.cpp:
    * TAO/tao/Var_Array_Argument_T.cpp:

Author: jwillemsen

TAO/tao/Acceptor_Impl.cpp

@@ -118,7 +118,7 @@ TAO_Concurrency_Strategy<SVC_HANDLER>::activate_svc_handler (SVC_HANDLER *sh,
   if (f->activate_server_connections ())
     {
       // Thread-per-connection concurrency model
-      TAO_Thread_Per_Connection_Handler *tpch = 0;
+      TAO_Thread_Per_Connection_Handler *tpch = nullptr;
 
       ACE_NEW_RETURN (tpch,
                       TAO_Thread_Per_Connection_Handler (sh,
@@ -167,7 +167,7 @@ TAO_Concurrency_Strategy<SVC_HANDLER>::activate_svc_handler (SVC_HANDLER *sh,
 
       if (TAO_debug_level > 0)
          {
-           const ACE_TCHAR *error_message = 0;
+           const ACE_TCHAR *error_message = nullptr;
            if (f->activate_server_connections ())
              error_message = ACE_TEXT("could not activate new connection");
            else

TAO/tao/Fixed_Array_Argument_T.cpp

@@ -53,7 +53,7 @@ TAO::In_Fixed_Array_Clonable_Argument_T<S_forany,Insert_Policy>::clone ()
   typename ARRAY_TRAITS::slice_type * tmp_ptr = 0;
   ACE_ALLOCATOR_RETURN (tmp_ptr,
                         ARRAY_TRAITS::alloc (),
-                        0);
+                        nullptr);
   ARRAY_TRAITS::copy (tmp_ptr, this->x_.in ());
 
   In_Fixed_Array_Clonable_Argument_T<S_forany,Insert_Policy>* clone_arg

TAO/tao/ORB_Core.cpp

@@ -878,7 +878,7 @@ TAO_ORB_Core::init (int &argc, char *argv[] )
 
           (ACE_LOG_MSG->*flagop)(value);
         }
-      else if (0 != (current_arg = arg_shifter.get_the_parameter
+      else if (nullptr != (current_arg = arg_shifter.get_the_parameter
                 (ACE_TEXT("-ORBHandleLoggingStrategyEvents"))))
         {
           ACE_Logging_Strategy *logging_strategy =

TAO/tao/Object_T.cpp

@@ -51,7 +51,7 @@ namespace TAO
           {
             TAO_Stub* stub = obj->_stubobj ();
 
-            if (stub != 0)
+            if (stub != nullptr)
               {
                 stub->_incr_refcnt ();
 

TAO/tao/Thread_Per_Connection_Handler.cpp

@@ -55,11 +55,11 @@ TAO_Thread_Per_Connection_Handler::activate_ch (long flags,
                          0,
                          ACE_DEFAULT_THREAD_PRIORITY,
                          -1,
-                         0,
-                         0,
-                         0,
-                         0,
-                         0,
+                         nullptr,
+                         nullptr,
+                         nullptr,
+                         nullptr,
+                         nullptr,
                          &thread_names[0]);
 }
 

TAO/tao/Transport_Cache_Manager_T.cpp

@@ -32,7 +32,7 @@ namespace TAO
     : percent_ (percent)
     , purging_strategy_ (purging)
     , cache_map_ (cache_maximum)
-    , cache_lock_ (0)
+    , cache_lock_ (nullptr)
     , cache_maximum_ (cache_maximum)
 #if defined (TAO_HAS_MONITOR_POINTS) && (TAO_HAS_MONITOR_POINTS == 1)
     , purge_monitor_ (0)

TAO/tao/Var_Array_Argument_T.cpp

@@ -55,7 +55,7 @@ TAO::In_Var_Array_Clonable_Argument_T<S_forany,Insert_Policy>::clone ()
   typename ARRAY_TRAITS::slice_type * tmp_ptr = 0;
   ACE_ALLOCATOR_RETURN (tmp_ptr,
                         ARRAY_TRAITS::alloc (),
-                        0);
+                        nullptr);
   ARRAY_TRAITS::copy(tmp_ptr, this->x_.in ());
 
   In_Var_Array_Clonable_Argument_T<S_forany,Insert_Policy>* clone_arg