Converting CodeChange into a real class to aid recursive changes

lib/code_comparison.rb

@@ -1,11 +1,19 @@
-class CodeChange < Struct.new(:signature, :operation)
+class CodeChange
+  attr_reader :signature
+  attr_reader :operation
+
   OPERATION_CHARS = {
     :added   => "+",
     :removed => "-",
     :changed => "c",
     :moved   => "m"   #Not used yet
   }
 
+  def initialize(signature, operation)
+    @signature = signature
+    @operation = operation
+  end
+
   def to_s
     "#{OPERATION_CHARS[self.operation]}  #{signature}"
   end
@@ -52,4 +60,4 @@ def removal(sig, sexp)
   def changed(old_sig, old_sexp, new_sig, new_sexp)
     CodeChange.new(old_sig, :changed)
   end
-end
+end