You can use a negated character class to match up until the
included chars in the class are found.
#!/usr/bin/env perl
use strict;
use warnings;
use feature 'say';
my @test_cases = ( 'KP_what_I_want(but_not_this',
'KP_what_I_want nor_this',
'KP_ nor_any_of_this',
'and this will not match',
);
for my $line (@test_cases) {
my ($exp) = $line =~ m/ KP_ # Required.
( [^ (]* ) # Capture until space
# or left paren.
/xi;
if (defined $exp) {say "<$exp>"}
else {say 'NO MATCH'};
}
__END__
<what_I_want>
<what_I_want>
<>
NO MATCH
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<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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