>  However, why does this work as expected, then? 
my @test = ($hashref->{ONE} .. $hashref->{TWO}); 
use constant GOODCONSTANT => \@test;

[download]

Short answer: that's how "binding" works!

my (like our ) has dual nature:

Declaration means the following equally named variables in scope are "bound" to a specific "reference" (saying address would be too simplisti/C) when translated to an op tree.

GOODCONSTANT then points to that reference at compile time, but the content of @test will only be populated at run time.

Try to access content of GOODCONSTANT at compile time, and you will fail.

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!

In reply to Re: Using hashref values in constant declarations.(binding) by LanX
in thread Using hashref values in constant declarations. by nameofmyuser

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.