Ooh. Thanks so much for that trick. Very nice.
How's this for the output functionality?
package Filter::Handle;
use strict;
use vars qw/@ISA/;
use Tie::Handle; @ISA = qw/Tie::Handle/;
sub TIEHANDLE {
my $class = shift;
bless { @_ }, $class;
}
sub new {
my $class = shift;
my $fh = shift;
tie *{$fh}, __PACKAGE__, fh => $fh, @_;
bless { fh => $fh }, $class;
}
sub DESTROY {
my $self = shift;
my $fh = $self->{fh};
{ local $^W = 0; untie *{$fh} }
}
sub PRINT {
my $self = shift;
my $fh = *{ $self->{fh} };
die "No output handler installed"
unless defined $self->{output};
print $fh $self->{output}->(@_);
}
sub CLOSE { }
Now to be used like this:
my $f = Filter::Handle->new(\*STDOUT,
output => sub {
my($file, $line) = (caller(1))[1,2];
return sprintf "%s:%d - %s\n",
$file, $line, join ' ', @_;
}
);
print "Foo";
I think this might be nice to put on CPAN. I've just
sent in my registration for a user ID. So... thanks very
much for that idea!