synchronized with date2 3.7

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9479 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/date.rb b/lib/date.rb
index 9d33198235..93419091ae 100644
--- a/lib/date.rb
+++ b/lib/date.rb
@@ -839,6 +839,10 @@ class Date
 
   once :wday
 
+  DAYNAMES.each_with_index do |n, i|
+    define_method(n.downcase + '?'){wday == i}
+  end
+
   # Is the current date old-style (Julian Calendar)?
   def os? () self.class.os?(jd, @sg) end
 
@@ -969,6 +973,9 @@ class Date
   # of the returned Date will be the last day of the target month.
   def << (n) self >> -n end
 
+  def next_month(n=1) self >> n end
+  def prev_month(n=1) self << n end
+
   # Step the current date forward +step+ days at a
   # time (or backward, if +step+ is negative) until
   # we reach +limit+ (inclusive), yielding the resultant