On Sat, Jul 12, 2014 at 10:18 AM, John Cowan <co...@mercury.ccil.org> wrote:
> Sanel Zukan scripsit: > > > Is this means that we are no longer allowed to write and support > > someting like: > > > > (define (1+x x) (+ 1 x)) > > > > ? > > If you are an implementer, you certainly can provide such a procedure. > > If you are a user, and you care about standards conformance, > you should choose a different identifier, as 1+x has never been a > standards-conformant identifier under *any* version of the Scheme > standard. However, most Scheme implementations will accept 1+x as a > valid identifier. > There are actually many implementations for which this is an error. Notably R6RS requires it to be an error. Schemes typically use the name `add1' for this. -- Alex
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