Created
June 27, 2011 17:21
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Computable Include
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| //////////////////////////////////////////////////////////// | |
| // <License> | |
| //////////////////////////////////////////////////////////// | |
| #pragma once | |
| //////////////////////////////////////////////////////////// | |
| // Title: Computable Include | |
| //////////////////////////////////////////////////////////// | |
| ////////////////////////////////////////////////////////////// | |
| // | |
| // Macro: computable_platform_include(className) | |
| // ------------------ | |
| // | |
| // A macro used to compute what .h to include based on the class | |
| // name passed and to the SYSTEM_PLATFORM. | |
| // | |
| // (start example) | |
| // | |
| // #define SYSTEM_PLATFORM Win32 | |
| // #include "computable_include.h" | |
| // | |
| // #include computable_platform_include(MyClass) | |
| // | |
| // (end example) | |
| // | |
| // Will be translate by the C Preprocessor to | |
| // | |
| // (start example) | |
| // | |
| // #include "Win32/MyClassWin32.h" | |
| // | |
| // (end example) | |
| // | |
| // This permits to avoid all sorts of | |
| // | |
| // (start example) | |
| // | |
| // #if defined(SYSTEM_PLATFORM_Win32) | |
| // #include "Win32/MyClassWin32.h" | |
| // #elif defined(SYSTEM_PLATFORM_Cocoa) | |
| // #include "Cocoa/MyClassCocoa.h" | |
| // #else | |
| // #error Platform not supported | |
| // #endif | |
| // | |
| // (end example) | |
| // | |
| // This could be extended as needed as in computable_system_include, computable_graphic_api_include | |
| // | |
| // See Also: | |
| // | |
| // <SYSTEM_PLATFORM> | |
| // | |
| ////////////////////////////////////////////////////////////// | |
| #ifndef SYSTEM_PLATFORM | |
| #error You must define the symbol SYSTEM_PLATFORM | |
| #else | |
| #define COMPUTABLE_PLATFORM_INCLUDE_QMAKESTR(x) #x | |
| #define COMPUTABLE_PLATFORM_INCLUDE_MAKESTR(x) COMPUTABLE_PLATFORM_INCLUDE_QMAKESTR(x) | |
| #define COMPUTABLE_PLATFORM_INCLUDE_MERGE(x, y) ./y/x.h | |
| #define COMPUTABLE_PLATFORM_INCLUDE_IMP(x) COMPUTABLE_PLATFORM_INCLUDE_MERGE(x, SYSTEM_PLATFORM) | |
| #define computable_platform_include(x) COMPUTABLE_PLATFORM_INCLUDE_MAKESTR( COMPUTABLE_PLATFORM_INCLUDE_IMP( x ) ) | |
| #endif |
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