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# date.rb: Written by Tadayoshi Funaba 1998-2011
require 'date_core'
class Date
class Infinity < Numeric # :nodoc:
include Comparable
def initialize(d=1) @d = d <=> 0 end
def d() @d end
protected :d
def zero? () false end
def finite? () false end
def infinite? () d.nonzero? end
def nan? () d.zero? end
def abs() self.class.new end
def -@ () self.class.new(-d) end
def +@ () self.class.new(+d) end
def <=> (other)
case other
when Infinity; return d <=> other.d
when Numeric; return d
else
begin
l, r = other.coerce(self)
return l <=> r
rescue NoMethodError
end
end
nil
end
def coerce(other)
case other
when Numeric; return -d, d
else
super
end
end
def to_f
return 0 if @d == 0
if @d > 0
Float::INFINITY
else
-Float::INFINITY
end
end
end
end
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