Hi all!

I've got a question that sets my head spinning. I've been asked about the possibility of freeze/thawing a scalar that's a subroutine reference. Can anyone make any suggestions? Will the B perl compiler module be of any use to me?

For example, say I have the following:

  my $a = sub { print "Hello!\n" };

I want to be able to store $a to a file, read it back from that file, and be still able to call it. Data::Dumper returns: $VAR1 = sub { "DUMMY" }, which obviously doesn't survive the round-trip.

So to reiterate, I'd like to know what freeze and thaw would look like in the following scenario:

  my $a = sub { print "Hello\n" };
  freeze( $a, "frozen.sub.file" );
  $a = undef;
  thaw( $a, "frozen.sub.file" );
  $a->(); # calls $a, printing "Hello\n"

[download]

Any and all assistance is greatly appreciated!

- m.

In reply to How to freeze/thaw anonymous subroutines? by mikezone

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.