1#!perl
2
3package Math::BigFloat::Trace;
4
5require 5.010;
6use strict;
7use warnings;
8
9use Exporter;
10use Math::BigFloat;
11
12our ($accuracy, $precision, $round_mode, $div_scale);
13
14our @ISA = qw(Exporter Math::BigFloat);
15
16our $VERSION = '0.51';
17
18use overload;                   # inherit overload from Math::BigFloat
19
20# Globals
21$accuracy = $precision = undef;
22$round_mode = 'even';
23$div_scale = 40;
24
25sub new {
26    my $proto = shift;
27    my $class = ref($proto) || $proto;
28
29    my $value = shift;
30    my $a = $accuracy;
31    $a = $_[0] if defined $_[0];
32    my $p = $precision;
33    $p = $_[1] if defined $_[1];
34    my $self = Math::BigFloat->new($value, $a, $p, $round_mode);
35
36    # remember, downgrading may return a BigInt, so don't meddle with class
37    # bless $self, $class;
38
39    print "MBF new '$value' => '$self' (", ref($self), ")";
40    return $self;
41}
42
43sub import {
44    print "MBF import ", join(' ', @_);
45    my $self = shift;
46
47    # we catch the constants, the rest goes go BigFloat
48    my @a = ();
49    foreach (@_) {
50        push @a, $_ if $_ ne ':constant';
51    }
52    overload::constant float => sub { $self->new(shift); };
53
54    Math::BigFloat->import(@a);                 # need it for subclasses
55#    $self->export_to_level(1,$self,@_);         # need this ?
56}
57
581;
59