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The statement

print qr/abc/;

produces the output

(?-xism:abc)

I looked in man perlop and didn't find a clear description of what this
means. Where's this documented? What's it mean?

fishfry <> wrote:

> The statement
>
> print qr/abc/;
>
> produces the output
>
> (?-xism:abc)
>
> I looked in man perlop and didn't find a clear description of what this
> means. Where's this documented? What's it mean?

Try perlre instead.

"(?imsx-imsx)"
One or more embedded pattern-match modifiers, to be turned on
(or turned off, if preceded by "-") for the remainder of the
pattern or the remainder of the enclosing pattern group (if
any). This is particularly useful for dynamic patterns, such
...

--
David Wall

"fishfry" <> wrote in message
news:BLOCKSPAMfishfry-...
> The statement
>
> print qr/abc/;
>
> produces the output
>
> (?-xism:abc)
>
> I looked in man perlop and didn't find a clear description of what this
> means. Where's this documented? What's it mean?

try perlre

gnari

On Thu, 05 Feb 2004 22:05:39 GMT, fishfry <>
wrote:

>The statement
>
> print qr/abc/;
>
>produces the output
>
>(?-xism:abc)
>
>I looked in man perlop and didn't find a clear description of what this
>means. Where's this documented? What's it mean?

perldoc perlre



See also module YAPE::Regex::Explain
<http://theoryx5.uwinnipeg.ca/CPAN/data/YAPE-Regex-Explain/Explain.html>

... which says:

The regular expression:

(?-imsx:abc)

matches as follows:

NODE EXPLANATION
----------------------------------------------------------------------
(?-imsx: group, but do not capture (case-sensitive)
(with ^ and $ matching normally) (with . not
matching \n) (matching whitespace and #
normally):
----------------------------------------------------------------------
abc 'abc'
----------------------------------------------------------------------
) end of grouping
----------------------------------------------------------------------

--
Andy Hassall <> / Space: disk usage analysis tool
<http://www.andyh.co.uk> / <http://www.andyhsoftware.co.uk/space>