In a tie constructor (TIESCALAR, TIEARRAY, TIEHASH, or TIEHANDLE) how can I access the value of the thing being tied? I really want to know how to do this for a TIEHANDLE, but I assume that the procedure would be about the same for any tie constructor. Similarly, can I set the tied variable during an untie?

Example code : I want to access the value of $t (or whatever the variable being tied is) in the TIESCALAR call. How can I get it? Or can I get it at all?

package TestTie; sub TIESCALAR{ my $pkg=shift; my $obj=[] ; bless $obj, $pkg; return $obj; } package main; my $t=9; tie $t , 'TestTie';
I've been through the perltie docs, the Tie chapter of Advanced Perl Programming and the source code for several of the Tie:: modules, but can't seem to find any pointers.

In reply to Access to tied variable in the tie constructor??? by lhoward

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.