>> >> 1. define all not implemented procedures/syntax as identifier-syntax, >> raise >> an expand time ¬-implemented condition on usage > > How is this different in actual use from just leaving them undefined? > The point of feature groups is to be able to *introspect* on what your > chosen Scheme can and can't do. >
At least the message is clear, undefined is like NullReferenceException or a segfault. It's not a mistake or an oversight, but an intention. What I dont understand is this need to introspect 'features'. Is this something that happens at runtime? Cheers leppie _______________________________________________ r6rs-discuss mailing list [email protected] http://lists.r6rs.org/cgi-bin/mailman/listinfo/r6rs-discuss
