decoding.rb in activesupport-4.1.0.beta1

- old
+ new

@@ -1,46 +1,39 @@
 require 'active_support/core_ext/module/attribute_accessors'
 require 'active_support/core_ext/module/delegation'
-require 'multi_json'
+require 'json'
 
 module ActiveSupport
   # Look for and parse json strings that look like ISO 8601 times.
   mattr_accessor :parse_json_times
 
   module JSON
+    # matches YAML-formatted dates
+    DATE_REGEX = /^(?:\d{4}-\d{2}-\d{2}|\d{4}-\d{1,2}-\d{1,2}[T \t]+\d{1,2}:\d{2}:\d{2}(\.[0-9]*)?(([ \t]*)Z|[-+]\d{2}?(:\d{2})?))$/
+    
     class << self
       # Parses a JSON string (JavaScript Object Notation) into a hash.
       # See www.json.org for more info.
       #
       #   ActiveSupport::JSON.decode("{\"team\":\"rails\",\"players\":\"36\"}")
       #   => {"team" => "rails", "players" => "36"}
-      def decode(json, options ={})
-        data = MultiJson.load(json, options)
+      def decode(json, options = {})
+        if options.present?
+          raise ArgumentError, "In Rails 4.1, ActiveSupport::JSON.decode no longer " \
+            "accepts an options hash for MultiJSON. MultiJSON reached its end of life " \
+            "and has been removed."
+        end
+
+        data = ::JSON.parse(json, quirks_mode: true)
+
         if ActiveSupport.parse_json_times
           convert_dates_from(data)
         else
           data
         end
       end
 
-      def engine
-        MultiJson.adapter
-      end
-      alias :backend :engine
-
-      def engine=(name)
-        MultiJson.use(name)
-      end
-      alias :backend= :engine=
-
-      def with_backend(name)
-        old_backend, self.backend = backend, name
-        yield
-      ensure
-        self.backend = old_backend
-      end
-
       # Returns the class of the error that will be raised when there is an
       # error in decoding JSON. Using this method means you won't directly
       # depend on the ActiveSupport's JSON implementation, in case it changes
       # in the future.
       #
@@ -48,10 +41,10 @@
       #     obj = ActiveSupport::JSON.decode(some_string)
       #   rescue ActiveSupport::JSON.parse_error
       #     Rails.logger.warn("Attempted to decode invalid JSON: #{some_string}")
       #   end
       def parse_error
-        MultiJson::DecodeError
+        ::JSON::ParserError
       end
 
       private
 
       def convert_dates_from(data)