Froze rails gems

[depot.git] / vendor / rails / activesupport / lib / active_support / core_ext / date / behavior.rb

diff --git a/vendor/rails/activesupport/lib/active_support/core_ext/date/behavior.rb b/vendor/rails/activesupport/lib/active_support/core_ext/date/behavior.rb
new file mode 100644 (file)
index 0000000..bd378eb
--- /dev/null
+++ b/vendor/rails/activesupport/lib/active_support/core_ext/date/behavior.rb
@@ -0,0 +1,42 @@
+require 'date'
+
+module ActiveSupport #:nodoc:
+  module CoreExtensions #:nodoc:
+    module Date #:nodoc:
+      module Behavior
+        # Enable more predictable duck-typing on Date-like classes. See
+        # Object#acts_like?.
+        def acts_like_date?
+          true
+        end
+
+        # Date memoizes some instance methods using metaprogramming to wrap
+        # the methods with one that caches the result in an instance variable.
+        #
+        # If a Date is frozen but the memoized method hasn't been called, the
+        # first call will result in a frozen object error since the memo
+        # instance variable is uninitialized.
+        #
+        # Work around by eagerly memoizing before freezing.
+        #
+        # Ruby 1.9 uses a preinitialized instance variable so it's unaffected.
+        # This hack is as close as we can get to feature detection:
+        begin
+          ::Date.today.freeze.jd
+        rescue => frozen_object_error
+          if frozen_object_error.message =~ /frozen/
+            def freeze #:nodoc:
+              self.class.private_instance_methods(false).each do |m|
+                if m.to_s =~ /\A__\d+__\Z/
+                  instance_variable_set(:"@#{m}", [send(m)])
+                end
+              end
+
+              super
+            end
+          end
+        end
+      end
+    end
+  end
+end