Semantics change in match-regex-right.

The way the end-position argument works in match-regex-right
and match-regst-right is poorly considered. It basically
enforces a constraint that there is a match which ends
at that position and does not go beyond. This patch changes
it work right: the functions test that the regex matches
up to that position, as if the string ended there.

* regex.c (match_regex_right_old): New static function,
identical to the previous match_regex_right.
Since we won't ever be using this inside TXR from any
other module, we don't make it external.
(match_regex_right): Rewritten to new semantics.
(match_regst_right_old): New static function;
provides the semantics of the old match_regst_right
based on match_regex_right_old.
(regex_init): Register match-regex-right and match-regst-right
intrinsics to the match_regex_right_old and
match_regst_right_old functions if compatibility <= 150 is
requested. Otherwise they go to the rewritten new
functions.

* txr.1: Documentation updated, and compat notes
added.

0 files changed, 0 insertions, 0 deletions