ç°¡æ½ã«è¨è¿°ããããTemplateHaskellã¨ãã¤ããï¼ ã¬ã³ã¼ãã«åå¤æ°æããã¦å¤ç¸ã«ããã Maybeãæèããªãã¨ãããªãç®æãæ¸ãããã(Control.Lens.Prismãã¤ããã°è¯ããããï¼) Objectå以å¤ã®åã«ãç¹ç°ã¡ã½ããã追å ã§ããåãããããä½ããã(Objectã¯ã©ã¹ã«ããã°ããï¼) ãã®ä»ãã¢ã¤ãã¢åéä¸ã§ãï¼ https://github.com/nushio3/practice/tree/master/duck {-# LANGUAGE DeriveDataTypeable #-} {-# LANGUAGE FlexibleContexts #-} {-# LANGUAGE ScopedTypeVariables #-} {-# LANGUAGE Rank2Types #-} {-# LANGUAGE TypeFamilies #-} module
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