gecko-dev/gfx/src/X11UndefineNone.h
Manish Goregaokar aad318e17a Bug 1300337 - Replace None_ variants from nsStyleConsts.h with None; r=heycam,TYLin
MozReview-Commit-ID: CxHzbEzjLxT

--HG--
extra : rebase_source : 232f90b8b107f7fb49f47a29a4e493660b8a7d87
2016-09-04 00:16:58 +05:30

24 lines
1.0 KiB
C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// The header <X11/X.h> defines "None" as a macro that expands to "0L".
// This is terrible because many enumerations have an enumerator named "None".
// To work around this, we undefine the macro "None", and define a replacement
// macro named "X11None".
// Include this header after including X11 headers, where necessary.
#ifdef None
# undef None
# define X11None 0L
// <X11/X.h> also defines "RevertToNone" as a macro that expands to "(int)None".
// Since we are undefining "None", that stops working. To keep it working,
// we undefine "RevertToNone" and redefine it in terms of "X11None".
# ifdef RevertToNone
# undef RevertToNone
# define RevertToNone (int)X11None
# endif
#endif