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add NEWS for expt change

* NEWS: Update for Mark's expt patch.
This commit is contained in:
Andy Wingo 2011-01-20 23:44:40 +01:00
parent 7cd99cbad6
commit dc78bee588

8
NEWS
View file

@ -10,6 +10,14 @@ latest prerelease, and a full NEWS corresponding to 1.8 -> 2.0.
Changes in 1.9.15 (since the 1.9.14 prerelease): Changes in 1.9.15 (since the 1.9.14 prerelease):
** `expt' and `integer-expt' changes when the base is 0
While `(expt 0 0)' is still 1, `(expt 0 N)' for N > 0 is now 0, and
`(expt 0 N)' for N < 0 is now a NaN value, and likewise for
integer-expt. This is more correct, and conforming to R6RS, but seems
to be incompatible with R5RS, which would always return 0 for all values
of N.
** And of course, the usual collection of bugfixes ** And of course, the usual collection of bugfixes
Interested users should see the ChangeLog for more information. Interested users should see the ChangeLog for more information.