Maxim, Maxim Cournoyer 写道: > I'd only agree to such a change if it's already been > standardized in the > RnRS as such Sure, I think that's implied. #true and #false are part of the R7RS-small standard. I don't know what Guile ‘is’, but it supports that part of the standard. I don't think it implements any of the RnRS completely? I've heard it said that Guile targets R5RS, but that was ages ago. Kind regards, T G-R