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| author | Gabriel Schneider <[email protected]> | 2026-09-28 12:39:43 -0300 |
|---|---|---|
| committer | Gabriel Schneider <[email protected]> | 2026-10-01 00:12:14 -0300 |
| commit | c8a3ecc3bcb36f0259f4d8ad2e0cdfcdc3183c9f (patch) | |
| tree | 281c5f96b398ea8c19cc65841088bc89075d1778 /.agents | |
| parent | c5c1c200ad66a16b73428de2c369fc15aacac8b4 (diff) | |
| download | pardes-c8a3ecc3bcb36f0259f4d8ad2e0cdfcdc3183c9f.tar.gz pardes-c8a3ecc3bcb36f0259f4d8ad2e0cdfcdc3183c9f.zip | |
A regular expression search is bounded by a step budget patched into mvzr, not windows and a repeat cap
The windows returned wrong matches: a candidate reaching a window's edge was
left to the next window, half a window on, which could answer a match starting
mid-token rather than the leftmost, and addr then pointed data's next write at
the wrong bytes. The repeat cap missed mvzr's own worst case, a chain of a?,
and alternation under a repeat, each exponential inside one mvzr call the
deadline could not interrupt; and it refused ordinary s/S patterns. build.zig
now patches the fetched mvzr at build time with a step counter on its
backtracking recursion (matchPattern), so a fresh fetch keeps it and a moved
anchor stops the build; regexp.zig gives each compiled pattern a budget, about
300 ms here, and a search that spends it fails as taking too long. Windows,
the cap and their special cases are gone, and matches are exact again.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Diffstat (limited to '.agents')
| -rw-r--r-- | .agents/skills/pardes-9p/SKILL.md | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/.agents/skills/pardes-9p/SKILL.md b/.agents/skills/pardes-9p/SKILL.md index 77acade3..393b0b0f 100644 --- a/.agents/skills/pardes-9p/SKILL.md +++ b/.agents/skills/pardes-9p/SKILL.md @@ -147,8 +147,9 @@ is why copying one onto another is all that acme's `addr=dot`, `dot=addr` and `/pattern/`, `2+1`), whose regexps are mvzr's searched as sam searches: `^`/`$` match at any line's start and end, `.` and `[^...]` never match a newline, the leftmost match wins (the first alternative there, not the -longest), `/re/` wraps unless `limit` is set, and since mvzr backtracks a -pattern with more than four `*`/`+`/`{}` is refused. A failed address says +longest), `/re/` wraps unless `limit` is set, and a search that backtracks +past a step budget (about 300 ms) fails with `regular expression search +took too long`. A failed address says why (`no match for regexp`, `address out of range`) and leaves no address: `data` refuses until the next good one, so a missed target is never written at the old one. Moving `dot` scrolls the pane to it. `limit` bounds a |