Added ability to compare date/time with infinity

Date, DateTime, Time and TimeWithZone can now be compared to infinity,
  so it's now possible to create ranges with one infinite bound and
  date/time object as another bound.

  Ex.: @range = Range.new(Date.today, Float::INFINITY)

Also it's possible to check inclusion of date/time in range with
  conversion.

  Ex.: @range.include?(Time.now + 1.year) # => true
       @range.include?(DateTime.now + 1.year) # => true

Ability to create date/time ranges with infinite bound is required
  for handling postgresql range types.

1 files changed, 13 insertions, 0 deletions

diff --git a/activesupport/CHANGELOG.md b/activesupport/CHANGELOG.md
index 6917be7efc..bee93ebfbc 100644
--- a/activesupport/CHANGELOG.md
+++ b/activesupport/CHANGELOG.md
@@ -1,5 +1,18 @@
 ## Rails 4.0.0 (unreleased) ##
 
+*   It's now possible to compare Date, DateTime, Time and TimeWithZone with Infinity
+    This allows to create date/time ranges with one infinite bound.
+    Example:
+
+        range = Range.new(Date.today, Float::INFINITY)
+
+    Also it's possible to check inclusion of date/time in range with conversion.
+
+        range.include?(Time.now + 1.year)     # => true
+        range.include?(DateTime.now + 1.year) # => true
+
+    *Alexander Grebennik*
+
 *   Remove meaningless `ActiveSupport::FrozenObjectError`, which was just an alias of `RuntimeError`.
 
     *Akira Matsuda*