Well, if hash values weren't lvalues, $h{1} = 2 wouldn't work. There's no reason why they shouldn't be lvalues when using the whole hash in list context. And any lvalues can be aliased, otherwise $_++ for ... could never work.

I'm not sure those things are explicitly documented somewhere.

The thing that surprises me though is that trying to increment the hash keys doesn't die like this one:

$ perl -wE 'my $x; $_++ for ($x, 1)'
Modification of a read-only value attempted at -e line 1.

[download]
Perl 6 - the future is here, just unevenly distributed

In reply to Re: Alias of hash-values? by moritz
in thread Alias of hash-values? by LanX

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.