From bde626ce30c80dd9409b7214f43e92c0f62447a0 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Fri, 3 Nov 2006 21:06:57 +0000
Subject: [PATCH] don't define EMPTY_PARAMETER_VALUE macro without wx prefix,
 this is an invitation for name clash; instead define wxEMPTY_PARAMETER_VALUE
 and use it in both variant.h and event.h

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42993 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 include/wx/cpp.h     |  6 ++++++
 include/wx/event.h   |  5 ++---
 include/wx/variant.h | 11 +++--------
 3 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/include/wx/cpp.h b/include/wx/cpp.h
index 6c93ca0ac9..77a907f3ac 100644
--- a/include/wx/cpp.h
+++ b/include/wx/cpp.h
@@ -47,5 +47,11 @@
 /* Create a "unique" name with the given prefix */
 #define wxMAKE_UNIQUE_NAME(text)    wxCONCAT_LINE(text)
 
+/*
+   This macro can be passed as argument to another macro when you don't have
+   anything to pass in fact.
+ */
+#define wxEMPTY_PARAMETER_VALUE /* Fake macro parameter value */
+
 #endif // _WX_CPP_H_
 
diff --git a/include/wx/event.h b/include/wx/event.h
index e04df54707..7c55d2c551 100644
--- a/include/wx/event.h
+++ b/include/wx/event.h
@@ -13,6 +13,7 @@
 #define _WX_EVENT_H__
 
 #include "wx/defs.h"
+#include "wx/cpp.h"
 #include "wx/object.h"
 #include "wx/clntdata.h"
 
@@ -94,8 +95,6 @@ typedef int wxEventType;
 #define DECLARE_EVENT_TABLE_ENTRY(type, winid, idLast, fn, obj) \
     wxEventTableEntry(type, winid, idLast, fn, obj)
 
-#define EMPTY_PARAMETER_VALUE /* Fake macro parameter value */
-
 #define BEGIN_DECLARE_EVENT_TYPES()
 #define END_DECLARE_EVENT_TYPES()
 #define DECLARE_EXPORTED_EVENT_TYPE(expdecl, name, value) \
@@ -103,7 +102,7 @@ typedef int wxEventType;
 #define DECLARE_EVENT_TYPE(name, value) \
     DECLARE_EXPORTED_EVENT_TYPE(WXDLLIMPEXP_CORE, name, value)
 #define DECLARE_LOCAL_EVENT_TYPE(name, value) \
-    DECLARE_EXPORTED_EVENT_TYPE(EMPTY_PARAMETER_VALUE, name, value)
+    DECLARE_EXPORTED_EVENT_TYPE(wxEMPTY_PARAMETER_VALUE, name, value)
 #define DEFINE_EVENT_TYPE(name) const wxEventType name = wxNewEventType();
 #define DEFINE_LOCAL_EVENT_TYPE(name) DEFINE_EVENT_TYPE(name)
 
diff --git a/include/wx/variant.h b/include/wx/variant.h
index 5d971dbba7..6087c029dd 100644
--- a/include/wx/variant.h
+++ b/include/wx/variant.h
@@ -20,6 +20,7 @@
 #include "wx/string.h"
 #include "wx/arrstr.h"
 #include "wx/list.h"
+#include "wx/cpp.h"
 
 #if wxUSE_DATETIME
     #include "wx/datetime.h"
@@ -316,21 +317,15 @@ private:
     DECLARE_DYNAMIC_CLASS(wxVariant)
 };
 
-/* Fake macro parameter value */
-#ifdef EMPTY_PARAMETER_VALUE
-    #undef EMPTY_PARAMETER_VALUE
-#endif
-#define EMPTY_PARAMETER_VALUE
-
 #define DECLARE_VARIANT_OBJECT(classname) \
-    DECLARE_VARIANT_OBJECT_EXPORTED(classname,EMPTY_PARAMETER_VALUE)
+    DECLARE_VARIANT_OBJECT_EXPORTED(classname, wxEMPTY_PARAMETER_VALUE)
 
 #define DECLARE_VARIANT_OBJECT_EXPORTED(classname,expdecl) \
 expdecl classname& operator << ( classname &object, const wxVariant &variant ); \
 expdecl wxVariant& operator << ( wxVariant &variant, const classname &object );
 
 #define IMPLEMENT_VARIANT_OBJECT(classname) \
-    IMPLEMENT_VARIANT_OBJECT_EXPORTED(classname,EMPTY_PARAMETER_VALUE)
+    IMPLEMENT_VARIANT_OBJECT_EXPORTED(classname, wxEMPTY_PARAMETER_VALUE)
 
 #define IMPLEMENT_VARIANT_OBJECT_EXPORTED_NO_EQ(classname,expdecl) \
 class classname##VariantData: public wxVariantData \
-- 
2.45.2