diff options
author | Kaz Kylheku <kaz@kylheku.com> | 2021-01-21 07:23:27 -0800 |
---|---|---|
committer | Kaz Kylheku <kaz@kylheku.com> | 2021-01-21 07:23:27 -0800 |
commit | 625a22dbae0b10eb03cbbbef0fb3a1457f916d7a (patch) | |
tree | 6ac91c5f7f703edd47230a684dd2b76dd421b7fa /checkman.txr | |
parent | 6ab8b9c6f03d13b96b599709f44da798552639c9 (diff) | |
download | txr-625a22dbae0b10eb03cbbbef0fb3a1457f916d7a.tar.gz txr-625a22dbae0b10eb03cbbbef0fb3a1457f916d7a.tar.bz2 txr-625a22dbae0b10eb03cbbbef0fb3a1457f916d7a.zip |
matcher: fix broken @(let @a @(some @a)) test case.
This is caused by the way the loop match compiler moves the
matching logic into a guard, which causes a re-ordering of the
variable assignments which interferes with backreferencing
when @(some) is embedded into a @(let), and probably other
situations. The issues is that the backreferencing equal
tests can be reordered to occur before the assignment which
sets the intial value of the backreferenced variable:
cart before the horse kind of thing.
* share/txr/stdlib/match.tl (compile-loop-match): Do not add
the submatch into the guard sequence. Thus guard1's vars and
var-exprs, move into into the main compiled-match,
and guard1's guard-expr moves into guard0. Thus guard1
disappears, guard0 becomes guard.
* tests/011/patmatch.tl: New test case that is also fixed,
and which was not fixed by a different approach to the problem
that I scrapped.
Diffstat (limited to 'checkman.txr')
0 files changed, 0 insertions, 0 deletions