lib/instructions/code/code_null_q.rb in nudge-0.2.6 vs lib/instructions/code/code_null_q.rb in nudge-0.2.7

@@ -1,15 +1,26 @@
+# pops the top +:code+ item;
+# pushes a new +:bool+ item with value +true+ if the +:code+ is an empty block
+#
+# *needs:* 1 +:code+
+#
+# *pushes:* 1 +:bool+
+#
+
 class CodeNullQInstruction < Instruction
   def preconditions?
     needs :code, 1
   end
+  
   def setup
     arg_blueprint = @context.pop_value(:code)
     @arg1 = NudgeProgram.new(arg_blueprint).blueprint
   end
+  
   def derive
     @result = ValuePoint.new("bool", @arg1 == "block {}")
   end
+  
   def cleanup
     pushes :bool, @result
   end
 end