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#!/usr/bin/perl -w package Math::BigFloat::Trace; require 5.005_02; use strict; use Exporter; use Math::BigFloat; use vars qw($VERSION @ISA $PACKAGE @EXPORT_OK $accuracy $precision $round_mode $div_scale); @ISA = qw(Exporter Math::BigFloat); $VERSION = '0.29'; use overload; # inherit overload from BigFloat # 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 $self = Math::BigFloat->new($value,$a,$p,$round_mode); # remember, downgrading may return a BigInt, so don't meddle with class # bless $self,$class; print "MBF new '$value' => '$self' (",ref($self),")"; return $self; } sub import { print "MBF import ",join(' ',@_); my $self = shift; # we catch the constants, the rest goes go BigFloat my @a = (); foreach (@_) { push @a, $_ if $_ ne ':constant'; } overload::constant float => sub { $self->new(shift); }; Math::BigFloat->import(@a); # need it for subclasses # $self->export_to_level(1,$self,@_); # need this ? } 1;
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