Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

I must admit that I'm a little surprised myself, but it turns out that or's precedence is so low that it is actually lower than return (probably because return is treated as a list operator). Which leads to the following result:

perl -MO=Deparse -e "sub test { return int(rand(2)) or print 'Nope' }" sub test { print 'Nope' unless return int rand 2; } -e syntax OK
I'm pretty sure this is not what you meant, because this would somehow try to do something in the sub after returning from it. I'm also not exactly sure what the return value of return itself would be :P.

Two ways to do what you want (beyond the one you already proposed), either with a temp variable:

my $result; $result = something() or croak "Something went wrong"; return $result;
Or, if this is the last line of your sub, you could remove the return altogether (if that's compatible with your coding rules):
sub mySub { ... something() or croak "Times are a'croaking"; }
The right way is the one that you like the most (again, respecting whatever coding rules should apply).


In reply to Re: Possible precedence issue with control flow operator by Eily
in thread Possible precedence issue with control flow operator by will_

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, 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
  • 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.
  • 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 exploiting the Monastery: (4)
    As of 2020-09-19 23:11 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      If at first I donít succeed, I Ö










      Results (116 votes). Check out past polls.

      Notices?