diff options
Diffstat (limited to 'base/compiler_specific.h')
| -rw-r--r-- | base/compiler_specific.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/base/compiler_specific.h b/base/compiler_specific.h index 43ff21c..99e4f8e 100644 --- a/base/compiler_specific.h +++ b/base/compiler_specific.h @@ -54,6 +54,21 @@ code \ MSVC_POP_WARNING() +// Allows exporting a class that inherits from a non-exported base class. +// This uses suppress instead of push/pop because the delimiter after the +// declaration (either "," or "{") has to be placed before the pop macro. +// +// Example usage: +// class EXPORT_API Foo : NON_EXPORTED_BASE(public Bar) { +// +// MSVC Compiler warning C4275: +// non dll-interface class 'Bar' used as base for dll-interface class 'Foo'. +// Note that this is intended to be used only when no access to the base class +// can be gained through the derived class. For more info, see +// http://msdn.microsoft.com/en-us/library/3tdb471s(VS.80).aspx +#define NON_EXPORTED_BASE(code) MSVC_SUPPRESS_WARNING(4275) \ + code + #else // Not MSVC #define MSVC_SUPPRESS_WARNING(n) @@ -63,6 +78,7 @@ #define MSVC_DISABLE_OPTIMIZE() #define MSVC_ENABLE_OPTIMIZE() #define ALLOW_THIS_IN_INITIALIZER_LIST(code) code +#define NON_EXPORTED_BASE(code) code #endif // COMPILER_MSVC |