Re^2: Regexp not capturing in named subrules (leftmost)

in reply to Re: Regexp not capturing in named subrules (leftmost)
in thread Regexp not capturing in named subrules

However, what puzzles me and should be apparent is that nothing at all was captured.

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Comment on Re^2: Regexp not capturing in named subrules (leftmost)

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Re^3: Regexp not capturing in named subrules (leftmost) by tye (Sage) on Sep 16, 2009 at 03:13 UTC
Since the "leftmost defined buffer" is inside of a group quantified by `{0}`, it isn't puzzling to me that this buffer didn't match. And it isn't surprising that a buffer that didn't match doesn't capture anything. Perhaps you were now expecting `thing => undef`, contrary to your previously stated expectation? If so, my limited testing shows that `%+` keys aren't pre-populated but the values are returned by magic (`%+` always appears empty even when `$+{moo}` returns `"o"` after `'cow' =~ /(?<moo>o+)/`). Update: I'm glad to report that the lack of keys in `%+` appears to have only been an effect of the quick-hack method I used to test, related to evaluation order problems. - tye	[reply] [d/l] [select]

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Re^3: Regexp not capturing in named subrules (leftmost)
by tye (Sage) on Sep 16, 2009 at 03:13 UTC

Since the "leftmost defined buffer" is inside of a group quantified by {0}, it isn't puzzling to me that this buffer didn't match. And it isn't surprising that a buffer that didn't match doesn't capture anything.

Perhaps you were now expecting thing => undef, contrary to your previously stated expectation? If so, my limited testing shows that %+ keys aren't pre-populated but the values are returned by magic (%+ always appears empty even when $+{moo} returns "o" after 'cow' =~ /(?<moo>o+)/).

Update: I'm glad to report that the lack of keys in %+ appears to have only been an effect of the quick-hack method I used to test, related to evaluation order problems.

- tye

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