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- // DO NOT PUT #pragma once or include guard check here
- // This header is designed to be able to be included multiple times
- // As external code and 3rd party headers can collide with our platform defines or compiler emulation,
- // this header can be used to disable them. The corresponding 'PostExternalInclude.h' enables the emulation
- // and platform defines again.
- //
- // Usage:
- // #include "PreExternalInclude.h"
- // #include "SomeExternalCode.h"
- // #include "3rdParty.h"
- // #include "PostExternalInclude.h"
- #if DETAIL__PREEXTERNALINCLUDE_HAS_BEEN_INCLUDED
- #error "PreExternalInclude.h has been included more than once or PostExternalInclude.h is missing."
- #endif
- #include "Internal/UndefineCompilerMacros.h"
- #include "Internal/UndefineCoreMacros.h"
- #define DETAIL__PREEXTERNALINCLUDE_HAS_BEEN_INCLUDED
- // detect whether windows SDK winuser.h has been included before, to
- // optionally restore some state afterwards (some 3rd party libraries
- // include windows.h which defines a lot of names as macros)
- #if defined(_WINUSER_)
- # define DETAIL__WINUSER_H_HAS_BEEN_INCLUDED 1
- #else
- # define DETAIL__WINUSER_H_HAS_BEEN_INCLUDED 0
- #endif
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