# date.rb: Written by Tadayoshi Funaba 1998-2011 require 'date_core' require 'date/format' 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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