I would say that what you are doing is probably not a very good software design. If you need something from your caller, it's probably a better idea to have the caller pass it as an argument. That way, it's documented that the called routine is using it. Using backdoor methods such as this to get information from the caller leads to unmaintainable code. Make sure you document this behavior so that anyone that uses this code in the future knows their DATA handle is going to be used when they call this method.
With that said, if you really need to do it without modifying the calling code, try this.
sub called {
my $caller = (caller)[0];
my $fh = eval '\*'.$caller.'::DATA';
my $data = <$fh>;
print "read: $data\n";
}
-
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.
|