Here is a more robust patch: 

package IO::patch;

# The following code:
#    use CGI;  my $q= CGI->new();  open CGI, "< $0";
# gives:
#    Can't locate object method "new" via package "IO::Handle"
#
# But download this code and put it into lib/IO/patch.pm and
# either add "use IO::patch;" to your script or add
# PERL5OPT=-MIO::patch to your environment, and this problem
# goes away.

require IO::Handle;

my $oldNew= \&IO::Handle::new;

*IO::Handle::new= \&newNew;

sub newNew {
    my $pkg= $_[0];
    if(  UNIVERSAL::isa( $pkg, "GLOB" )  ) {
        my $name= *{$pkg}{NAME};
        my $can= UNIVERSAL::can( $name, "new" );
        if(  $can  ) {
            $_[0]= $name;
            goto &$can;
        }
        require Carp;
        Carp::cluck( "Called new() on an open IO::Handle?" )
            if  $^W;
    }
    goto &$oldNew;
}

[download]

I've tested this quite a bit and it seems to work well. This suggests an update to IO/Handle.pm if Perl itself can't be easily patched...

Update: tilly noted that there could be conflicts for methods other than new(). This problem doesn't happen for object methods and many modules only have a single class methods, new(), so I'll be adding an AUTOLOAD but the above should still be quite useful in the mean time.

        - tye (but my friends call me "Tye")

In reply to (tye)Re: Unconfuse filehandles and classes by tye
in thread Unconfuse filehandles and classes by tilly

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