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??

That's a good guess. If you place a "warn" inside of BEGIN, UNITCHECK, CHECK, INIT, and END blocks, you'll see that the "only once" warning comes immediately after the BEGIN, but before UNITCHECK. It's being generated before runtime, so by the time the subroutine is actually called, it's too late.

Those solutions that deal with import are probably the best answer, though it wouldn't fix fully-qualified usages of reduce (where there is no import call).

I think a better solution would simply be for Perl to completely ignore $a and $b with respect to "used only once" warnings. Those should be additionally special-cased. Now to code-dive again and find where that could be implemented.


Dave


In reply to Re^2: Eliminating "used only once" warnings from List::Util::reduce by davido
in thread Eliminating "used only once" warnings from List::Util::reduce by davido

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 taking refuge in the Monastery: (6)
    As of 2014-09-16 04:12 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      My favorite cookbook is:










      Results (155 votes), past polls