Bless is not just for constructors!
The sample code in this post Re: Use cases for 'sub Pckg::func { }' ? shows a parser for arithmetic expressions that
builds a parse tree (AbstractSyntaxTree) consisting of anonymous arrays blessed into
a package named for the operation it should perform. I can then
get the value of the entire tree just by sending the method ->value to the head of the tree
and rely on perl's polymorphism to execute the value sub in the correct package.
The sub "node" does the blessing into any requested package.
-
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.
|
