http://www.perlmonks.org?node_id=1019239


in reply to Re^2: More efficient dereferencing of a subroutine return
in thread More efficient dereferencing of a subroutine return

Can you show what exactly gives you that error? I get no errors/warnings with this: 
#!/usr/bin/env perl
use strict;
use warnings;
use feature 'say';

my @result = @{ subroutine() };
say "@result";

sub subroutine {
    my @array = ();
    return \@array;
}

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Re^4: More efficient dereferencing of a subroutine return
by parv (Parson) on Feb 18, 2013 at 00:05 UTC

    Did you, and the one before you, missed the part where I wrote about the case of undef being returned, as in ... 

    use strict;
my @p = @{ list() };
sub list { return undef; }

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    ...?

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[d/l]

      That is what you said, but look at the OP's code, its always  return \@array which can never be undef

      an empty array is better than undef

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[d/l]

        It seems you and I read the representation of the problem differently. Your reply presumes that every return from sub is always a return of an array reference. (If that promise is made to the user of the sub, then I have no disagreement with direct dereferencing of the return value.) I think of the value returned being an array reference where possible; else, nothing or undef is returned.

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