Add Date::Infinity implementation, bump version to 1.0.9 (Fixes #50)

CHANGELOG

@@ -1,3 +1,7 @@
+=== 1.0.9 (2013-03-19)
+
+* Add Date::Infinity implementation (jeremyevans) (#50)
+
 === 1.0.8 (2013-02-28)
 
 * Switch %i to %d in format strings to work on ruby 2.0 (jeremyevans)

home_run.gemspec

@@ -1,6 +1,6 @@
 HOME_RUN_GEMSPEC = Gem::Specification.new do |s|
   s.name = 'home_run'
-  s.version = '1.0.8'
+  s.version = '1.0.9'
   s.platform = Gem::Platform::RUBY
   s.has_rdoc = true
   s.extra_rdoc_files = ["README.rdoc", "CHANGELOG", "LICENSE"]

lib/date.rb

@@ -4,4 +4,59 @@
   raise unless RUBY_PLATFORM =~ /mswin|mingw/
   require "#{RUBY_VERSION[0...3]}/date_ext"
 end
+
+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
+
 require "date/format" unless defined?(Date::Format::ZONES)