Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?

chromatic Fixes Filehandle Filter (part 2)

by chromatic (Archbishop)
on Aug 11, 2000 at 06:45 UTC ( #27446=note: print w/ replies, xml ) Need Help??

in reply to RE: RE: Filehandle Filter
in thread Filehandle Filter

Okay, I got rid of the hash and used blessed typeglobs, just because I'm that kinda guy and I want the approval of heroes like chip and merlyn and Damian.

package Filter::Handle; use strict; use vars qw/@ISA/; use Tie::Handle; @ISA = qw/Tie::Handle/; sub TIEHANDLE { my $class = shift; my $fh = shift; bless $fh, $class; } sub new { my $class = shift; my $fh = shift; my $sub = shift; *fh = $sub; tie *{$fh}, __PACKAGE__, $fh; bless $fh, $class; } sub DESTROY { my $self = shift; my $fh = *{ $self }; { local $^W = 0; untie *{$fh} } } sub PRINT { my $self = shift; my $fh = *$self; my $code = *fh{CODE}; die "No output handler installed" unless defined $code; print $fh $code->(@_); } sub CLOSE { }
You can pass an anonymous sub or a sub ref to the constructor:
#!/usr/bin/perl -w use strict; use Filter::Handle; local *OUTPUT; open(OUTPUT, ">handle.txt") || die "Can't open: $!"; my $fh = \*OUTPUT; my $f = Filter::Handle->new($fh, sub { my($file, $line) = (caller(1))[1,2]; return sprintf "%s:%d - %s\n", $file, $line, @_; }); print OUTPUT "Foo"; print OUTPUT "Bar";
Yeah, that's pretty evil. But hey, why not?

Comment on chromatic Fixes Filehandle Filter (part 2)
Select or Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://27446]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others studying the Monastery: (7)
As of 2015-10-13 23:13 GMT
Find Nodes?
    Voting Booth?

    Does Humor Belong in Programming?

    Results (316 votes), past polls