comment on

This is a good idea, although I think I may have made the problem statement over-specific—I'd really like to be able to handle any circular reference, not just a reference to an array of several copies of a single variable. Thus, maybe the appropriate thing to do would be

sub switch_var {
    tie $_[2], to => $_[1];
}

package to;
sub TIESCALAR {
    bless \$_[1] => $_[0];
}

sub STORE { ${$_[0]} = $_[1] }

sub FETCH { ${$_[0]} }
[download]

(There's some package out there already on CPAN that uses the to package for similar effect, but I can't find it. UPDATE: It's Tie::Util. Also, the functionality that I've described is quite similar—indeed, maybe identical—to that provided by Tie::Coupler.)

I wonder if there's a non-tie-based solution? I might have to do switch_var several times, and going through many ties could get quite slow.

In reply to Re^2: Transitive aliases by JadeNB
in thread Transitive aliases by JadeNB

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.


No such thing as a small change
	PerlMonks