Remove unnecessary definition of members methods by eval

Author: pitr-ch

lib/concurrent/synchronization/immutable_struct.rb

@@ -11,20 +11,12 @@ class ImmutableStruct < Synchronization::Object
       def self.with_fields(*names, &block)
         Class.new(self) do
           attr_reader(*names)
-
+          const_set :MEMBERS, names
           class_eval <<-RUBY, __FILE__, __LINE__ + 1
             def initialize(#{names.join(', ')})
               #{names.map { |n| '@' + n.to_s }.join(', ')} = #{names.join(', ')}
               ensure_ivar_visibility!
             end
-
-            def members
-              #{names.inspect}
-            end
-
-            def self.members
-              #{names.inspect}
-            end
           RUBY
 
           instance_eval &block if block
@@ -46,6 +38,14 @@ def self.[](*args)
         new *args
       end
 
+      def self.members
+        MEMBERS
+      end
+
+      def members
+        MEMBERS
+      end
+
       include Enumerable
 
       def each(&block)