G'day lightoverhead,
I ran that code and got the same result as you:
$ perl -Mstrict -Mwarnings -E '
"abcdef" =~ / .+ (?{say "Matched so far: $&"}) bcdef $/x;
'
Matched so far: a
I then stepped through the code using Regexp::Debugger:
$ perl -Mstrict -Mwarnings -E '
use Regexp::Debugger;
"abcdef" =~ / .+ (?{say "Matched so far: $&"}) bcdef $/x;
'
This showed each of the six "Matched so far: ..." lines in the same order as you have them. It also showed backtracking behaviour as I, and presumably you, would expect.
The problem seems to lie with just the output; however, I don't know what that problem is.
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<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).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|