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Postings from June 2009
Dr.Ruud wrote:
> H.Merijn Brand wrote:
>> Michael G Schwern:
>>> What I was thinking was something like:
>>>
>>> open my $fh, "<", $file or die $fh->error;
>>
>> this is *very* counter-intuitive.
>> After a fail, I expect $fh to be false. How do I call a method on an
>> undefined value?
>
> Welcome to the wonderful world of objects.
Though defined() is tougher:
perl -Mstrict -MData::Dumper -wle'
my $value; # undef
my $obj = bless \$value, "Foo";
print Dumper $obj;
print "defined:", defined $obj;
print $obj;
package Foo;
use overload nomethod => \&_val;
sub _val { ${ $_[0] } }
'
$VAR1 = bless( do{\(my $o = undef)}, 'Foo' );
defined:1
Use of uninitialized value in print at -e line 9.
Can "//" obey overloading?
--
Ruud
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