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root |
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#!/usr/bin/perl -w |
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package Math::BigFloat::Trace; |
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require 5.005_02; |
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use strict; |
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use Exporter; |
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use Math::BigFloat; |
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use vars qw($VERSION @ISA $PACKAGE @EXPORT_OK |
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$accuracy $precision $round_mode $div_scale); |
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@ISA = qw(Exporter Math::BigFloat); |
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$VERSION = 0.01; |
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use overload; # inherit overload from BigFloat |
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# Globals |
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$accuracy = $precision = undef; |
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$round_mode = 'even'; |
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$div_scale = 40; |
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sub new |
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{ |
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my $proto = shift; |
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my $class = ref($proto) || $proto; |
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my $value = shift; |
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my $a = $accuracy; $a = $_[0] if defined $_[0]; |
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my $p = $precision; $p = $_[1] if defined $_[1]; |
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my $self = Math::BigFloat->new($value,$a,$p,$round_mode); |
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# remember, downgrading may return a BigInt, so don't meddle with class |
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# bless $self,$class; |
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print "MBF new '$value' => '$self' (",ref($self),")"; |
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return $self; |
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} |
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sub import |
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{ |
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print "MBF import ",join(' ',@_); |
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my $self = shift; |
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# we catch the constants, the rest goes go BigFloat |
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my @a = (); |
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foreach (@_) |
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{ |
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push @a, $_ if $_ ne ':constant'; |
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} |
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overload::constant float => sub { $self->new(shift); }; |
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Math::BigFloat->import(@a); # need it for subclasses |
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# $self->export_to_level(1,$self,@_); # need this ? |
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} |
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1; |
