Function platformColourInstance

tutorials/external/catch.hpp:8197–8209

    };

    IColourImpl* platformColourInstance() {
        static Win32ColourImpl s_instance;

        IConfigPtr config = getCurrentContext().getConfig();
        UseColour::YesOrNo colourMode = config
            ? config->useColour()
            : UseColour::Auto;
        if( colourMode == UseColour::Auto )
            colourMode = UseColour::Yes;
        return colourMode == UseColour::Yes
            ? &s_instance
            : NoColourImpl::instance();
    }

} // end anon namespace
} // end namespace Catch