[r6rs-discuss] [Scheme-reports] [scheme-reports] Scheme pattern matching & R*RS
Andre van Tonder
andre at het.brown.edu
Fri Jan 21 18:07:26 EST 2011
On Fri, 21 Jan 2011, Jim Wise wrote:
> Andre van Tonder <andre at het.brown.edu> writes:
>> Just note, FWIW, that R6RS library semantics have no such thing as
>> "overriding". You would need to do a complicated EXCEPT import to exclude
>> the usual WG1 meanings.
> Actually, (prefix ...) is both safer than (except ..._) (a particular
> implementation may have additional forms in the library beyond what's
> required by WG2), and simpler to use:
> (import (prefix (rnrs match) match:))
They were talking about overriding LAMBDA, etc.
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