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Re: Unexpected behavior of function 'say'

by LanX (Canon)
on Mar 05, 2013 at 15:24 UTC ( #1021847=note: print w/ replies, xml ) Need Help??


in reply to Unexpected behavior of function 'say'

hmm not in 5.10

lanx@nc10-ubuntu:~$ perl use strict; use warnings; say STDOUT 'like a charm'; Can't locate object method "say" via package "IO::Handle" at - line 4.

But the last line should lead to the answer.

print FH is (supposed to be) indirect object syntax of the filehandle-object, so somehow the method say was activated by default in your environment.

Anyway calling say w/o FH shouldn't work!

Cheers Rolf


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Re^2: Unexpected behavior of function 'say'
by tobyink (Abbot) on Mar 05, 2013 at 15:32 UTC

    This is because of a change in Perl 5.14:

    Filehandle method calls load IO::File on demand

    The OP's code does work in Perl 5.10, if you run it with the -MIO::Handle parameter to manually load the IO::Handle package.

    package Cow { use Moo; has name => (is => 'lazy', default => sub { 'Mooington' }) } say Cow->new->name
      So print FH was magic in doing so prior to 5.14?

      I hate breakes in symmetry...

      BTW: I checked IO::Handle , it's a normal method and features aren't checked.

      sub say { @_ or croak 'usage: $io->say(ARGS)'; my $this = shift; local $\ = "\n"; print $this @_; }

      Cheers Rolf

        The point of the feature is to avoid to break existing function calls. Without feature, the code the OP posted is still the very same method call as it was before 5.10, so everything is working as it should.

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