How-To deal with system errors

One of the simpler parts of writing platform independent code that nonetheless annoys easily is that different platforms define different error codes, and have different APIs for accessing them – and for accessing error messages matching the codes.

This library provides an abstraction for this.

Platform errors

#include <liberate/sys/errors.h>

auto code = liberate::sys::error_code();
auto msg = liberate::sys::error_message(code);

• liberate::sys::error_code() invokes WSAGetLastError() or returns errno.

• liberate::sys::error_message() invokes whatever platform function there is for retrieving an associated error message, and transcodes the result to UTF-8 before returning.