Commit | Line | Data |
126f3c5f |
1 | #!/usr/bin/perl -w |
2 | |
3 | package Math::BigFloat::Trace; |
4 | |
5 | require 5.005_02; |
6 | use strict; |
7 | |
8 | use Exporter; |
9 | use Math::BigFloat; |
10 | use vars qw($VERSION @ISA $PACKAGE @EXPORT_OK |
11 | $accuracy $precision $round_mode $div_scale); |
12 | |
13 | @ISA = qw(Exporter Math::BigFloat); |
14 | |
15 | $VERSION = 0.01; |
16 | |
17 | use overload; # inherit overload from BigFloat |
18 | |
19 | # Globals |
20 | $accuracy = $precision = undef; |
21 | $round_mode = 'even'; |
22 | $div_scale = 40; |
23 | |
24 | sub new |
25 | { |
26 | my $proto = shift; |
27 | my $class = ref($proto) || $proto; |
28 | |
29 | my $value = shift; |
30 | my $a = $accuracy; $a = $_[0] if defined $_[0]; |
31 | my $p = $precision; $p = $_[1] if defined $_[1]; |
32 | my $self = Math::BigFloat->new($value,$a,$p,$round_mode); |
33 | |
34 | # remember, downgrading may return a BigInt, so don't meddle with class |
35 | # bless $self,$class; |
36 | |
37 | print "MBF new '$value' => '$self' (",ref($self),")"; |
38 | return $self; |
39 | } |
40 | |
41 | sub import |
42 | { |
43 | print "MBF import ",join(' ',@_); |
44 | my $self = shift; |
45 | |
46 | # we catch the constants, the rest goes go BigFloat |
47 | my @a = (); |
48 | foreach (@_) |
49 | { |
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 | |
58 | 1; |