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package Interchange6::Currency; |
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=head1 NAME |
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Interchange6::Currency - Currency objects for Interchange 6 |
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=head1 VERSION |
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0.101 |
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=for stopwords CLDR eCommerce Mottram Shutterstock SysPete |
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=cut |
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our $VERSION = '0.101'; |
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use Moo; |
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extends 'CLDR::Number::Format::Currency'; |
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use Carp; |
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use Class::Load qw/load_class/; |
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use Math::BigFloat; |
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use Safe::Isa; |
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use Sub::Quote qw/quote_sub/; |
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use namespace::clean; |
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use overload |
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'0+' => sub { shift->value }, |
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'""' => sub { shift->as_string }, |
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'+' => \&_add, |
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'-' => \&_subtract, |
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'*' => \&_multiply, |
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'/' => \&_divide, |
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'%' => \&modulo, |
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'<=>' => \&cmp_value, |
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'cmp' => \&cmp, |
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'=' => \&clone, |
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; |
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=head1 DESCRIPTION |
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Currency objects for Interchange6 Open Source eCommerce with Unicode |
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CLDR localization and rate conversion. |
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Extends L with accurate calculation functions |
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using L. |
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Many useful standard operators are overloaded and return currency objects |
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if appropriate. |
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Although this class was written to satisfy the specific requirements of |
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Interchange6 it is suitable for use as a standalone module. See L |
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for other currency modules. |
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=head1 ATTRIBUTES |
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=head2 value |
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Value as simple decimal, e.g.: 3.45 |
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All values are coerced into L. |
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=cut |
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has value => ( |
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is => 'rwp', |
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required => 1, |
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coerce => quote_sub(q{ $_[0]->$_isa("Math::BigFloat") ? $_[0] : Math::BigFloat->new( $_[0] ) }), |
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); |
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# check for currency objects with different currency codes and if arg |
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# is a currency object return its value |
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sub _clean_arg { |
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my ( $self, $arg ) = @_; |
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# uncoverable branch true |
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croak "_clean_arg is a class method" unless $self->$_isa(__PACKAGE__); |
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if ( $arg->$_isa(__PACKAGE__) ) { |
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croak "Cannot perform calculation when currencies do not match" |
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if $self->currency_code ne $arg->currency_code; |
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return $arg->value; |
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} |
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return $arg; |
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} |
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=head2 converter_class |
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Defaults to L. |
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The class name which handles conversion to a new C. |
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The converter class can be any class that supports the following method |
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signature: |
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sub convert { |
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my ($self, $price, $from, $to) = @_; |
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return $converted_price; |
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}; |
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In addition this module supports the following converters: |
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=over |
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=item * L |
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=back |
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=cut |
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has converter_class => ( |
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is => 'ro', |
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isa => quote_sub(q{ die "$_[0] is not a valid class name" unless ( ref(\$_[0]) eq 'SCALAR' && $_[0] =~ /^\S+$/ ) }), |
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default => "Finance::Currency::Convert::WebserviceX", |
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); |
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=head2 converter |
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Vivified L. |
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=cut |
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has converter => ( |
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is => 'lazy', |
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isa => quote_sub(q{ die "Not a valid converter class" unless $_[0]->$_can('convert') }), |
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init_arg => undef, |
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); |
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129
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sub _build_converter { |
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my $self = shift; |
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load_class( $self->converter_class ); |
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1307
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return $self->converter_class->new; |
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} |
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135
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=head1 METHODS |
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137
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=head2 BUILD |
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Sets precision for automatic rounding of L to |
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L. |
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142
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=cut |
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144
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sub BUILD { |
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1
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134097
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my $self = shift; |
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147
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# force cash trigger so we can reset precision on value |
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834
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$self->cash( $self->cash ); |
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19930
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$self->value->precision( -$self->maximum_fraction_digits ); |
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} |
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152
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=head2 clone %new_attrs? |
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Returns clone of the currency object possibly with new attribute values (if |
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any are supplied). |
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157
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=cut |
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159
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sub clone { |
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1
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3949
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my ( $self, %new_attrs ) = @_; |
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876
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return __PACKAGE__->new( |
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value => $self->value, |
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currency_code => $self->currency_code, |
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locale => $self->locale, |
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%new_attrs, |
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); |
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} |
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169
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=head2 convert $new_corrency_code |
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Convert to new currency using L. |
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B If C is called in void context then the currency object |
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is mutated in place. If called in list or scalar context then the original |
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object is not modified and a new L object is returned |
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instead. |
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178
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=cut |
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180
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sub convert { |
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my ( $self, $new_code ) = @_; |
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183
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305
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if ( $self->currency_code eq $new_code ) { |
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185
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# currency code has not changed |
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18
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if ( defined wantarray ) { |
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188
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# called in list or scalar context |
189
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1
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4
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return $self->clone; |
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} |
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else { |
192
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193
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# void context |
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return; |
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} |
196
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} |
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else { |
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199
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# remove precision before conversion since new currency may have |
200
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# different maximum_fraction_digits and we don't want to lose accuracy |
201
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99
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$self->value->precision(undef); |
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203
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# currency code has changed so convert via converter_class |
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205
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141
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my $new_value; |
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207
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9
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50
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32
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if ( $self->converter_class eq 'Finance::Currency::Convert::XE' ) { |
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209
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# XE is special |
210
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0
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0
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0
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$new_value = $self->converter->convert( |
211
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value => $self->value, |
212
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source => $self->currency_code, |
213
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target => $new_code |
214
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) || croak "convert failed: " . $self->converter->error . "\n"; |
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} |
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else { |
217
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# other |
218
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9
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175
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$new_value = |
219
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$self->converter->convert( $self->value, $self->currency_code, |
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$new_code ); |
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} |
222
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223
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8
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100
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2848
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croak "convert failed" unless defined $new_value; |
224
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225
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7
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100
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20
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if ( defined wantarray ) { |
226
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227
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# called in list or scalar context |
228
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229
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5
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16
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return $self->clone( |
230
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|
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currency_code => $new_code, |
231
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value => $new_value, |
232
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); |
233
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} |
234
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else { |
235
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236
|
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|
# void context |
237
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238
|
2
|
|
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47
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$self->currency_code($new_code); |
239
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2
|
|
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|
|
1269
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$self->_set_value($new_value); |
240
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241
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|
|
# force cash trigger so we can reset precision on value |
242
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2
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797
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$self->cash( $self->cash ); |
243
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2
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951
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$self->value->precision( -$self->maximum_fraction_digits ); |
244
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245
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2
|
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|
|
414
|
return; |
246
|
|
|
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} |
247
|
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} |
248
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} |
249
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250
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|
=head2 as_string |
251
|
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252
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|
|
Stringified formatted currency, e.g.: $3.45 |
253
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254
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=cut |
255
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256
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sub as_string { |
257
|
74
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|
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74
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1
|
30415
|
return $_[0]->format( $_[0]->value ); |
258
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} |
259
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260
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=head2 stringify |
261
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262
|
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|
|
Alias for L. |
263
|
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264
|
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|
|
=cut |
265
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266
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sub stringify { |
267
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1
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|
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1
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1
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2437
|
return $_[0]->as_string; |
268
|
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|
|
} |
269
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270
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|
=head2 add $arg |
271
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272
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|
Add C<$arg> to L in place. |
273
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|
274
|
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|
|
|
|
=cut |
275
|
|
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|
276
|
|
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|
|
|
|
sub add { |
277
|
3
|
|
|
3
|
1
|
7634
|
my ( $self, $arg ) = @_; |
278
|
3
|
|
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|
|
15
|
$self->value->badd( $self->_clean_arg($arg) ); |
279
|
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|
|
} |
280
|
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281
|
|
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|
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|
|
# for overloaded '+' |
282
|
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|
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|
|
sub _add { |
283
|
8
|
|
|
8
|
|
13011
|
my ( $self, $arg ) = @_; |
284
|
8
|
|
|
|
|
41
|
$self->clone( |
285
|
|
|
|
|
|
|
value => $self->value->copy->badd( $self->_clean_arg($arg) ) ); |
286
|
|
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|
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|
|
} |
287
|
|
|
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288
|
|
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|
|
=head2 subtract $arg |
289
|
|
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|
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|
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290
|
|
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|
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|
|
Subtract C<$arg> from L in place. |
291
|
|
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|
292
|
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|
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|
|
=cut |
293
|
|
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|
|
294
|
|
|
|
|
|
|
sub subtract { |
295
|
3
|
|
|
3
|
1
|
4065
|
my ( $self, $arg ) = @_; |
296
|
3
|
|
|
|
|
13
|
$self->value->bsub( $self->_clean_arg($arg) ); |
297
|
|
|
|
|
|
|
} |
298
|
|
|
|
|
|
|
|
299
|
|
|
|
|
|
|
# for overloaded '-' |
300
|
|
|
|
|
|
|
sub _subtract { |
301
|
8
|
|
|
8
|
|
9627
|
my ( $self, $arg, $swap ) = @_; |
302
|
8
|
|
|
|
|
40
|
my $result = $self->value->copy->bsub( $self->_clean_arg($arg) ); |
303
|
8
|
100
|
|
|
|
3331
|
$self->clone( value => $swap ? $result->bneg : $result ); |
304
|
|
|
|
|
|
|
} |
305
|
|
|
|
|
|
|
|
306
|
|
|
|
|
|
|
=head2 multiply $arg |
307
|
|
|
|
|
|
|
|
308
|
|
|
|
|
|
|
Multiply L by C<$arg> in place. |
309
|
|
|
|
|
|
|
|
310
|
|
|
|
|
|
|
=cut |
311
|
|
|
|
|
|
|
|
312
|
|
|
|
|
|
|
sub multiply { |
313
|
3
|
|
|
3
|
1
|
3985
|
my ( $self, $arg ) = @_; |
314
|
3
|
|
|
|
|
13
|
$self->value->bmul( $self->_clean_arg($arg) ); |
315
|
|
|
|
|
|
|
} |
316
|
|
|
|
|
|
|
|
317
|
|
|
|
|
|
|
# for overloaded '*' |
318
|
|
|
|
|
|
|
sub _multiply { |
319
|
2
|
|
|
2
|
|
2871
|
my ( $self, $arg ) = @_; |
320
|
2
|
|
|
|
|
11
|
$self->clone( |
321
|
|
|
|
|
|
|
value => $self->value->copy->bmul( $self->_clean_arg($arg) ) ); |
322
|
|
|
|
|
|
|
} |
323
|
|
|
|
|
|
|
|
324
|
|
|
|
|
|
|
=head2 divide $arg |
325
|
|
|
|
|
|
|
|
326
|
|
|
|
|
|
|
Divide L by C<$arg> in place. |
327
|
|
|
|
|
|
|
|
328
|
|
|
|
|
|
|
=cut |
329
|
|
|
|
|
|
|
|
330
|
|
|
|
|
|
|
sub divide { |
331
|
3
|
|
|
3
|
1
|
3998
|
my ( $self, $arg ) = @_; |
332
|
3
|
|
|
|
|
14
|
$self->value->bdiv( $self->_clean_arg($arg) ); |
333
|
|
|
|
|
|
|
} |
334
|
|
|
|
|
|
|
|
335
|
|
|
|
|
|
|
# for overloaded '/' |
336
|
|
|
|
|
|
|
sub _divide { |
337
|
5
|
|
|
5
|
|
6979
|
my ( $self, $arg, $swap ) = @_; |
338
|
5
|
|
|
|
|
10
|
my $result; |
339
|
5
|
100
|
|
|
|
12
|
if ($swap) { |
340
|
1
|
|
|
|
|
5
|
$result = |
341
|
|
|
|
|
|
|
Math::BigFloat->new( $self->_clean_arg($arg) )->bdiv( $self->value ); |
342
|
|
|
|
|
|
|
} |
343
|
|
|
|
|
|
|
else { |
344
|
4
|
|
|
|
|
22
|
$result = $self->value->copy->bdiv( $self->_clean_arg($arg) ); |
345
|
|
|
|
|
|
|
} |
346
|
5
|
|
|
|
|
3089
|
$self->clone( value => $result ); |
347
|
|
|
|
|
|
|
} |
348
|
|
|
|
|
|
|
|
349
|
|
|
|
|
|
|
=head2 modulo $arg |
350
|
|
|
|
|
|
|
|
351
|
|
|
|
|
|
|
Return L C<%> C<$arg> as currency object. |
352
|
|
|
|
|
|
|
|
353
|
|
|
|
|
|
|
=cut |
354
|
|
|
|
|
|
|
|
355
|
|
|
|
|
|
|
sub modulo { |
356
|
6
|
|
|
6
|
1
|
7643
|
my ( $self, $arg, $swap ) = @_; |
357
|
6
|
|
|
|
|
7
|
my $result; |
358
|
6
|
100
|
|
|
|
16
|
if ($swap) { |
359
|
1
|
|
|
|
|
5
|
$result = |
360
|
|
|
|
|
|
|
Math::BigFloat->new( $self->_clean_arg($arg) )->bmod( $self->value ); |
361
|
|
|
|
|
|
|
} |
362
|
|
|
|
|
|
|
else { |
363
|
5
|
|
|
|
|
26
|
$result = $self->value->copy->bmod( $self->_clean_arg($arg) ); |
364
|
|
|
|
|
|
|
} |
365
|
5
|
|
|
|
|
2222
|
$self->clone( value => $result ); |
366
|
|
|
|
|
|
|
} |
367
|
|
|
|
|
|
|
|
368
|
|
|
|
|
|
|
=head2 cmp_value $arg |
369
|
|
|
|
|
|
|
|
370
|
|
|
|
|
|
|
Equivalent to L C<< <=> >> C<$arg>. |
371
|
|
|
|
|
|
|
|
372
|
|
|
|
|
|
|
=cut |
373
|
|
|
|
|
|
|
|
374
|
|
|
|
|
|
|
sub cmp_value { |
375
|
37
|
|
|
37
|
1
|
29159
|
my ( $self, $arg, $swap ) = @_; |
376
|
37
|
100
|
|
|
|
91
|
if ($swap) { |
377
|
3
|
|
|
|
|
8
|
return Math::BigFloat->new( $self->_clean_arg($arg) ) |
378
|
|
|
|
|
|
|
->bcmp( $self->value ); |
379
|
|
|
|
|
|
|
} |
380
|
|
|
|
|
|
|
else { |
381
|
34
|
|
|
|
|
112
|
return $self->value->bcmp( $self->_clean_arg($arg) ); |
382
|
|
|
|
|
|
|
} |
383
|
|
|
|
|
|
|
} |
384
|
|
|
|
|
|
|
|
385
|
|
|
|
|
|
|
=head2 cmp $arg |
386
|
|
|
|
|
|
|
|
387
|
|
|
|
|
|
|
String comparison. |
388
|
|
|
|
|
|
|
|
389
|
|
|
|
|
|
|
Not always useful in itself since string comparison of stringified currency |
390
|
|
|
|
|
|
|
objects might not produce what you expect depending on locale and currency |
391
|
|
|
|
|
|
|
code. |
392
|
|
|
|
|
|
|
|
393
|
|
|
|
|
|
|
=cut |
394
|
|
|
|
|
|
|
|
395
|
|
|
|
|
|
|
sub cmp { |
396
|
29
|
|
|
29
|
1
|
24807
|
my ( $self, $arg, $swap ) = @_; |
397
|
29
|
100
|
|
|
|
66
|
if ($swap) { |
398
|
3
|
|
|
|
|
10
|
return "$arg" cmp "$self"; |
399
|
|
|
|
|
|
|
} |
400
|
|
|
|
|
|
|
else { |
401
|
26
|
|
|
|
|
67
|
return "$self" cmp "$arg"; |
402
|
|
|
|
|
|
|
} |
403
|
|
|
|
|
|
|
} |
404
|
|
|
|
|
|
|
|
405
|
|
|
|
|
|
|
=head2 SEE ALSO |
406
|
|
|
|
|
|
|
|
407
|
|
|
|
|
|
|
Other modules which perform currency maths: |
408
|
|
|
|
|
|
|
|
409
|
|
|
|
|
|
|
=over |
410
|
|
|
|
|
|
|
|
411
|
|
|
|
|
|
|
=item * L |
412
|
|
|
|
|
|
|
|
413
|
|
|
|
|
|
|
=item * L |
414
|
|
|
|
|
|
|
|
415
|
|
|
|
|
|
|
=back |
416
|
|
|
|
|
|
|
|
417
|
|
|
|
|
|
|
Other Interchange6 eCommerce modules: |
418
|
|
|
|
|
|
|
|
419
|
|
|
|
|
|
|
=over |
420
|
|
|
|
|
|
|
|
421
|
|
|
|
|
|
|
=item * L |
422
|
|
|
|
|
|
|
|
423
|
|
|
|
|
|
|
=item * L |
424
|
|
|
|
|
|
|
|
425
|
|
|
|
|
|
|
=item * L |
426
|
|
|
|
|
|
|
|
427
|
|
|
|
|
|
|
=back |
428
|
|
|
|
|
|
|
|
429
|
|
|
|
|
|
|
=head1 AUTHORS |
430
|
|
|
|
|
|
|
|
431
|
|
|
|
|
|
|
Peter Mottram (SysPete), C |
432
|
|
|
|
|
|
|
|
433
|
|
|
|
|
|
|
=head1 ACKNOWLEDGEMENTS |
434
|
|
|
|
|
|
|
|
435
|
|
|
|
|
|
|
Shutterstock, Inc for the excellent L and all of the authors |
436
|
|
|
|
|
|
|
of L and L. |
437
|
|
|
|
|
|
|
|
438
|
|
|
|
|
|
|
=head1 LICENSE AND COPYRIGHT |
439
|
|
|
|
|
|
|
|
440
|
|
|
|
|
|
|
Copyright 2015-2016 Peter Mottram (SysPete). |
441
|
|
|
|
|
|
|
|
442
|
|
|
|
|
|
|
This program is free software; you can redistribute it and/or modify it |
443
|
|
|
|
|
|
|
under the terms of either: the GNU General Public License as published |
444
|
|
|
|
|
|
|
by the Free Software Foundation; or the Artistic License. |
445
|
|
|
|
|
|
|
|
446
|
|
|
|
|
|
|
See http://dev.perl.org/licenses/ for more information. |
447
|
|
|
|
|
|
|
|
448
|
|
|
|
|
|
|
Unicode is a registered trademark of Unicode, Inc., in the United States |
449
|
|
|
|
|
|
|
and other countries. |
450
|
|
|
|
|
|
|
|
451
|
|
|
|
|
|
|
=cut |
452
|
|
|
|
|
|
|
|
453
|
|
|
|
|
|
|
1; |