I often using something like this in C++ if( nullptr != pfnErrorSink ) pfnErrorSink( "outofrange", __FILE__, __LINE__ ); return E_BOUNDS; // Or

I often using something like this in C++ if( nullptr != pfnErrorSink ) pfnErrorSink( "outofrange", __FILE__, __LINE__ ); return E_BOUNDS; // Or sometimes throw E_BOUNDS; Where pfnErrorSink is either global, thread_local or a field keeping C function pointer provided by whoever consumes the code.