[Ecls-list] patch for additional clhs compliance

Juan Jose Garcia-Ripoll jjgarcia at users.sourceforge.net
Tue Apr 1 12:13:31 UTC 2008

On Tue, Apr 1, 2008 at 6:00 AM, Geo Carncross <geocar at gmail.com> wrote:
 > I noticed that (PROG2) isn't working the way the CLHS says it should.
 >  >From the CLHS:
 >  prog2 evaluates first-form, then second-form, and then forms, yielding
 >  as its only value the primary value yielded by first-form.

 This must be a typo. If you look at the notes at the bottom of the
 specification (http://www.lisp.org/HyperSpec/Body/mac_prog1cm_prog2.html)
 you will notice this:

  (prog1 form*) ==  (values (multiple-value-prog1 form*))
  (prog2 form1 form*) ==  (let () form1 (prog1 form*))

 Hence, PROG2 returns the primary value of the _second_ form.


 Facultad de Fisicas, Universidad Complutense,
 Ciudad Universitaria s/n Madrid 28040 (Spain)

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