[r6rs-discuss] >= should not act on subversion, but rather version

AndrevanTonder andre at het.brown.edu
Thu Jun 14 09:44:47 EDT 2007


With the current version reference porposal, it is not clear to me
how I would concisely express the very common case of an interval of
versions, e.g.,

   "Any version equal to or later than 5.45"

This would not work:

   ((>= 5) (>= 4) (>= 5))

since version 5.94 would not match.  Neither would version 6.1, etc.

I could write

   (or ((>= 5) (>= 4) (>= 5))
       ((>= 5) (>= 5))
       ((>= 6)))

but this seems rather unwieldy for such a simple concept.

I would propose instead letting the >= and <= act on the whole version, not the
subversions, so I could express the above as

   (>= (5 4 5))

Andre



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