The inner scope doesn't get a copy of the match variables, rather the optree for the inner scope just has reference to the outer scope match variables--the opnode pointers point to the same memory. (Or they did the last time I looked, though some of this code was touched to fix crashes in Windows forking perl and iThreads for 5.8.0)
You're right about the references--\$1 makes reference to the magic match variable which always refers to the active first match, as it works its magic by peering at the current optree pointers. I'll go patch that bit up.
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>
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
Want more info? How to link or
or How to display code and escape characters
are good places to start.