lib/lisp/interpreter/errors.rb in lisp-interpreter-0.3.1 vs lib/lisp/interpreter/errors.rb in lisp-interpreter-0.3.2

@@ -5,9 +5,13 @@
   end
 
   def unbalanced_quotes_error
     'error signaled: unbalanced quotes'
   end
+
+  def arg_err_build(exp, got)
+    'Incorrect number of arguments, expected ' + exp.to_s + ' got ' + got.to_s
+  end
 end
 
 class SchemeException < RuntimeError
 end