GNU bug report logs -
#78884
30.1; peg-parse does not treat its arguments as sequence
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Reported by: Tim Landscheidt <tim <at> tim-landscheidt.de>
Date: Tue, 24 Jun 2025 00:13:02 UTC
Severity: normal
Found in version 30.1
Done: Stefan Monnier <monnier <at> iro.umontreal.ca>
Bug is archived. No further changes may be made.
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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
The docstring for Emacs 30.1's peg-parse reads:
| (peg-parse &rest PEXS)
| Match PEXS at point.
| PEXS is a sequence of PEG expressions, implicitly combined with ‘and’.
| Returns STACK if the match succeed and signals an error on failure,
| moving point along the way.
However, it will fail with (for example) "Wrong type
argument: listp" when called as such:
| ELISP> (with-temp-buffer
| (insert "ABCDEF")
| (goto-char (point-min))
| (peg-parse
| (bob)
| "ABC"))
| *** Eval error *** Wrong type argument: listp, "ABC"
| ELISP>
An explicit sequence with "and" works:
| ELISP> (with-temp-buffer
| (insert "ABCDEF")
| (goto-char (point-min))
| (peg-parse
| (and
| (bob)
| "ABC")))
| t
| ELISP>
This bug report was last modified 17 days ago.
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