First, neither of those are closures. They are both examples of static variables and named
functions. The term "closure" refers to a code reference that also carries along some
variables. In neither of these case is the $x being carried around in a code reference (in
part because no code references are being used).
There is indeed code reference. It is stored in
the symbol table for the main
package. It points
to a CV, just like any other code reference,
and the CV has a pointer to the pad, which does
have the $x
variable captured in it, just like
any other closure.
So yes, it is a closure.
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.