NAME

Math::Roman - A roman numerals converter

SYNOPSIS

use Math::Roman;

10R.say; # X
1996R.say; # MCMXCVI
(1000R + 996R)R.say; # MCMXCVI
(Math::Roman.new: "MCMXCVI").as-arabic.say; # 1996

DESCRIPTION

Math::Roman is a roman numerals converter

CONSTRUCTOR

Defined as:

multi method new(Str $roman) { self.bless(value => to-arabic($roman)) }
multi method new(Int $arabic) { self.bless(value => $arabic) }
method Bridge { $!value }
sub postfix:<R> is export { Math::Roman.new: $^value };

Creates a Math::Roman instance internally and returns it as an integer or a str corresponding with the context. Postfix R provides a syntactic sugar for converting arabic numerals into roman numerals (e.g., 10R returns X).

METHODS

as-arabic

Defined as:

method as-arabic(--> Int)

Returns the instance as an arabic numeral.

SUBS

to-roman

Defined as:

sub to-roman(Int $n where $n >= 0 --> Str) ix export

Returns the roman numeral form of the integer $n.

to-arabic

Defined as:

sub to-arabic(Str $r, $pos = 0 --> Int) is export

Returns the arabic numeral form of the roman numeral $r.

AUTHOR

Itsuki Toyota titsuki@cpan.org

COPYRIGHT AND LICENSE

Copyright 2020 Itsuki Toyota

This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.