Right; :ratchet turns off backtracking, but the `|` operator still needs to
find the best match. I should have said "LTM" rather than backtracking,
since that's what I was referring to--trying multiple terms to find the
best match.
On Tue, Sep 12, 2017 at 2:20 PM Patrick R. Michaud via RT <
perl6-bugs-follo...@perl.org> wrote:
> On Mon, Sep 11, 2017 at 09:48:01AM -0700, Dan Zwell wrote:
> >
> > `|` matches the longest input:
> > > 'ab' ~~ / ^:ratchet [ . | .. ] $ /
> > ｢ab｣
> >
> > If the regex contains empty code blocks, backtracking fails:
> > > 'ab' ~~ / ^:ratchet [ {}. | {}.. ] $ /
> > Nil
>
> Isn't the whole point of :ratchet to turn off backtracking...? From S05
> (which I know isn't official anymore but it describes what :ratchet does or
> was intended to do):
>
> "The new :r or :ratchet modifier causes this regex to not backtrack by
> default."
>
> It looks to me like the two above examples are working exactly as
> designed/intended.
>
> Pm
>
>
