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Re^3: ${^MATCH} regex special variable(s) and /p regex modifier

by JavaFan (Canon)
on Oct 04, 2011 at 11:15 UTC ( #929512=note: print w/replies, xml ) Need Help??

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  1. or download this
    $ perl -wE 'my $s = "foo bar"; $s =~ /(bar)/; say ${^PREMATCH}'
foo 
...
Use of uninitialized value $^PREMATCH in say at -e line 1.

$
  2. or download this
    $ perl -Mre=debug -wE 'my $s = "foo bar"; $s =~ /bar/;'
Compiling REx "bar"
...
Match successful!
Freeing REx: "(bar)"
$

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