Function useColourOnPlatform

tests/catch.hpp:8044–8055

    };

    bool useColourOnPlatform() {
        return
#ifdef CATCH_PLATFORM_MAC
            !isDebuggerActive() &&
#endif
#if !(defined(__DJGPP__) && defined(__STRICT_ANSI__))
            isatty(STDOUT_FILENO)
#else
            false
#endif
            ;
    }
    IColourImpl* platformColourInstance() {
        ErrnoGuard guard;
        IConfigPtr config = getCurrentContext().getConfig();