Mini Shell

#!perl

package Math::BigInt::Trace;

require 5.010;
use strict;
use warnings;

use Exporter;
use Math::BigInt;

our ($accuracy, $precision, $round_mode, $div_scale);

our @ISA = qw(Exporter Math::BigInt);

our $VERSION = '0.51';

use overload;                   # inherit overload from Math::BigInt

# Globals
$accuracy = $precision = undef;
$round_mode = 'even';
$div_scale = 40;

sub new {
    my $proto = shift;
    my $class = ref($proto) || $proto;

    my $value = shift;
    my $a = $accuracy;
    $a = $_[0] if defined $_[0];
    my $p = $precision;
    $p = $_[1] if defined $_[1];
    my $self = Math::BigInt->new($value, $a, $p, $round_mode);
    bless $self, $class;
    print "MBI new '$value' => '$self' (", ref($self), ")";
    return $self;
}

sub import {
    print "MBI import ", join(' ', @_);
    my $self = shift;
    Math::BigInt::import($self, @_);            # need it for subclasses
#    $self->export_to_level(1, $self, @_);       # need this ?
    @_ = ();
}

1;