* Add Range#overlaps?(range), Range#include?(range), and Range#step without a block. [brandon] Closes #9746

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7800 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

1 files changed, 24 insertions, 0 deletions

diff --git a/activesupport/lib/active_support/core_ext/range/include_range.rb b/activesupport/lib/active_support/core_ext/range/include_range.rb
new file mode 100644
index 0000000000..a6b4e9ff64
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/range/include_range.rb
@@ -0,0 +1,24 @@
+module ActiveSupport #:nodoc:
+  module CoreExtensions #:nodoc:
+    module Range #:nodoc:
+      # Check if a Range includes another Range
+      module IncludeRange
+
+        def self.included(klass) #:nodoc:
+          klass.send(:alias_method_chain, :include?, :range)
+        end        
+        
+        def include_with_range?(value)
+          if value.is_a?(::Range)
+            operator = exclude_end? ? :< : :<=
+            end_value = value.exclude_end? ? last.succ : last
+            include?(value.first) && (value.last <=> end_value).send(operator, 0)
+          else
+            include_without_range?(value)
+          end
+        end
+        
+      end
+    end
+  end
+end
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