I think you've got things reversed. log_to_handle() is not part of the framework, it's a function that Tom already has lying around. The framework does it's logging by running a coderef you provide and passing in the log message as the signle argument. 
# deep inside the framework
&$logger("frobnication successful");

[download]

Tom's problem is that his log_to_handle() function is expecting several arguments including a filehandle and so he can't reuse in the framework. He would need it to be 

# deep inside the framework
&$logger($LOGHANDLE, "frobnication successful");

[download]

Currying allows Tom to take log_to_handle and turn it into a function that already knows what handle to use and only needs a single argument. One way to do that is 

my $logger = sub {
  my $msg = shift;
  log_to_handle($MYHANDLE, $msg);
};

[download]
and then pass $logger into the framework. Of course that's a lot more typing than we'd like so with AutoCurry you can just do 
my $logger = log_to_handle_c($MYHANDLE);

[download]
the _c at the end means that rather than running the log_to_handle function we want a new coderef which will be suitable for the framework.

In reply to Re^2: Near-free function currying in Perl by fergal
in thread Near-free function currying in Perl by tmoertel

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.