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require 5;
package Pod::Simple::Debug;
use strict;
use vars qw($VERSION );
$VERSION = '3.29_5';
sub import {
  my($value,$variable);
   
  if(@_ == 2) {
    $value = $_[1];
  } elsif(@_ == 3) {
    ($variable, $value) = @_[1,2];
     
    ($variable, $value) = ($value, $variable)
       if     defined $value    and ref($value)    eq 'SCALAR'
      and not(defined $variable and ref($variable) eq 'SCALAR')
    ; # tolerate getting it backwards
     
    unless( defined $variable and ref($variable) eq 'SCALAR') {
      require Carp;
      Carp::croak("Usage:\n use Pod::Simple::Debug (NUMVAL)\nor"
                . "\n use Pod::Simple::Debug (\\\$var, STARTNUMVAL)\nAborting");
    }
  } else {
    require Carp;
    Carp::croak("Usage:\n use Pod::Simple::Debug (NUMVAL)\nor"
                    . "\n use Pod::Simple::Debug (\\\$var, STARTNUMVAL)\nAborting");
  }
  if( defined &Pod::Simple::DEBUG ) {
    require Carp;
    Carp::croak("It's too late to call Pod::Simple::Debug -- "
              . "Pod::Simple has already loaded\nAborting");
  }
   
  $value = 0 unless defined $value;
  unless($value =~ m/^-?\d+$/) {
    require Carp;
    Carp::croak( "$value isn't a numeric value."
            . "\nUsage:\n use Pod::Simple::Debug (NUMVAL)\nor"
                    . "\n use Pod::Simple::Debug (\\\$var, STARTNUMVAL)\nAborting");
  }
  if( defined $variable ) {
    # make a not-really-constant
    *Pod::Simple::DEBUG = sub () { $$variable } ;
    $$variable = $value;
    print "# Starting Pod::Simple::DEBUG = non-constant $variable with val $value\n";
  } else {
    *Pod::Simple::DEBUG = eval " sub () { $value } ";
    print "# Starting Pod::Simple::DEBUG = $value\n";
  }
   
  require Pod::Simple;
  return;
}
1;
__END__
HideShow 114 lines of Pod
=head1 NAME
Pod::Simple::Debug -- put Pod::Simple into trace/debug mode
=head1 SYNOPSIS
 use Pod::Simple::Debug (5);  # or some integer
Or:
 my $debuglevel;
 use Pod::Simple::Debug (\$debuglevel, 0);
 ...some stuff that uses Pod::Simple to do stuff, but which
  you don't want debug output from...
 $debug_level = 4;
 ...some stuff that uses Pod::Simple to do stuff, but which
  you DO want debug output from...
 $debug_level = 0;
=head1 DESCRIPTION
This is an internal module for controlling the debug level (a.k.a. trace
level) of Pod::Simple.  This is of interest only to Pod::Simple
developers.
=head1 CAVEATS
Note that you should load this module I<before> loading Pod::Simple (or
any Pod::Simple-based class).  If you try loading Pod::Simple::Debug
after &Pod::Simple::DEBUG is already defined, Pod::Simple::Debug will
throw a fatal error to the effect that
"It's too late to call Pod::Simple::Debug".
Note that the C<use Pod::Simple::Debug (\$x, I<somenum>)> mode will make
Pod::Simple (et al) run rather slower, since &Pod::Simple::DEBUG won't
be a constant sub anymore, and so Pod::Simple (et al) won't compile with
constant-folding.
=head1 GUTS
Doing this:
  use Pod::Simple::Debug (5);  # or some integer
is basically equivalent to:
  BEGIN { sub Pod::Simple::DEBUG () {5} }  # or some integer
  use Pod::Simple ();
And this:
  use Pod::Simple::Debug (\$debug_level,0);  # or some integer
is basically equivalent to this:
  my $debug_level;
  BEGIN { $debug_level = 0 }
  BEGIN { sub Pod::Simple::DEBUG () { $debug_level }
  use Pod::Simple ();
=head1 SEE ALSO
L<Pod::Simple>
The article "Constants in Perl", in I<The Perl Journal> issue
21.  See L<http://interglacial.com/tpj/21/>
=head1 SUPPORT
Questions or discussion about POD and Pod::Simple should be sent to the
pod-people@perl.org mail list. Send an empty email to
pod-people-subscribe@perl.org to subscribe.
This module is managed in an open GitHub repository,
L<https://github.com/theory/pod-simple/>. Feel free to fork and contribute, or
to clone L<git://github.com/theory/pod-simple.git> and send patches!
Patches against Pod::Simple are welcome. Please send bug reports to
<bug-pod-simple@rt.cpan.org>.
=head1 COPYRIGHT AND DISCLAIMERS
Copyright (c) 2002 Sean M. Burke.
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
This program is distributed in the hope that it will be useful, but
without any warranty; without even the implied warranty of
merchantability or fitness for a particular purpose.
=head1 AUTHOR
Pod::Simple was created by Sean M. Burke <sburke@cpan.org>.
But don't bother him, he's retired.
Pod::Simple is maintained by:
=over
=item * Allison Randal C<allison@perl.org>
=item * Hans Dieter Pearcey C<hdp@cpan.org>
=item * David E. Wheeler C<dwheeler@cpan.org>
=back
=cut