What version of Perl are you using? The original usage example 
    use Filter::Handle qw/subs/;
    Filter \*STDOUT, sub { "Foo: @_\n" };
    print "Bar";
    UnFilter \*STDOUT;

[download]
works for me correctly in 5.6.2, but fails in 5.10.1 with 
Deep recursion on subroutine "Filter::Handle::PRINT" at .../lib/Filter
+/Handle.pm line 51.
Segmentation fault (core dumped)

[download]

When I replace $_[0] with shift, it fails in all the versions from 5.6.2 to blead: 

Not a GLOB reference at .../lib/Filter/Handle.pm line 50.
    (in cleanup) Not a GLOB reference at .../lib/Filter/Handle.pm line
+ 25 during global destruction.

[download]

> it's a shame that this is no longer on CPAN

See Text::OutputFilter.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Re^3: Filehandle Filter by choroba
in thread Filehandle Filter by btrott

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.