Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??

I have a script that calls a function in a module, and inside the module a global variable is defined. The function in the module tests the value of the global variable inside a try{} block. When the global is declared using "my", the variable is undefined inside the try{}. If I change the declaration to "our", or access the variable outside the try{} but inside in the normal scope of the function, then the variable is defined correctly. It seems like the initialization of the variable is optimized out, that the code in the try{} isn't analyzed when the function is initialized. I am trying to understand why this is the case, and whether this is expected behavior or not. Using Perl 5.8.3.

Thanks,
-Andy

Calling script:

#!/usr/bin/perl -w require "./global_stuff.pm"; global_stuff::print_global_variable();

Module: global_stuff.pm:

package global_stuff; use Error qw(:try); use strict; my $GLOBAL_VARIABLE = "IT'S WORKING FINE"; sub print_global_variable { #warn "global_variable = $GLOBAL_VARIABLE"; try { warn "global_variable = $GLOBAL_VARIABLE"; } catch Error with { }; } return 1;

In reply to global variable initialization inside try{} by legova

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others wandering the Monastery: (12)
    As of 2014-08-01 08:08 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      My favorite superfluous repetitious redundant duplicative phrase is:









      Results (257 votes), past polls