Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw
 
PerlMonks  

Comment on

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

Good morning,

I found a strange behaviour of perl when a function has the same fully qualified name as a package name. Here a shortened example:

Code 1: fails

#! /usr/bin/perl use warnings; use strict; package ABCconf; sub Query { my( $package ) = caller; print "Query called from $package\n"; my $x = ABCconf::Query->new(); } sub Insert { print "Insert called\n"; my $x = ABCconf::Query->new(); # <= problem: calls ABCconf::Query +and then on its output ->new } # Insert package ABCconf::Query; sub new { my $class = shift; print "New called: $class\n"; return bless {}, $class; } # new package main; ABCconf::Query(); print "-" x 60, "\n"; ABCconf::Insert();

Output:

D:\>perl testBug.pl Query called from main New called: ABCconf::Query ------------------------------------------------------------ Insert called Query called from ABCconf New called: ABCconf::Query New called: ABCconf::Query=HASH(0x226290) Attempt to bless into a reference at testBug.pl line 24.

If I put the sub Insert before sub Query, everything works as expected.

Code 2: works

#! /usr/bin/perl use warnings; use strict; package ABCconf; sub Insert { print "Insert called\n"; my $x = ABCconf::Query->new(); } # Insert sub Query { my( $package ) = caller; print "Query called from $package\n"; my $x = ABCconf::Query->new(); } package ABCconf::Query; sub new { my $class = shift; print "New called: $class\n"; return bless {}, $class; } # new package main; ABCconf::Query(); print "-" x 60, "\n"; ABCconf::Insert();

Output:

D:\>perl testBug.pl Query called from main New called: ABCconf::Query ------------------------------------------------------------ Insert called New called: ABCconf::Query

I know it isn't a good idea to use the same fully qualified name for a package or a sub, but I can't change it. Is this a bug, an inconsistency or a feature?

Testet with

D:\>perl -v This is perl, v5.8.8 built for MSWin32-x86-multi-thread (with 18 registered patches, see perl -V for more detail) Copyright 1987-2007, Larry Wall Binary build 822 [280952] provided by ActiveState http://www.ActiveSta +te.com Built Jul 31 2007 19:34:48 ...

Best regards,
perl -e "s>>*F>e=>y)\*martinF)stronat)=>print,print v8.8.8.32.11.32"


In reply to Bug or inconsitency? FQN of Package and sub name identical by strat

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
  • 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 meditating upon the Monastery: (6)
    As of 2015-07-04 03:10 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









      Results (57 votes), past polls