{"categories":[],"author_url":"https://blog.hatena.ne.jp/fumiexcel/","published":"2012-11-11 17:29:50","type":"rich","height":"190","author_name":"fumiexcel","title":"Free\u30e2\u30ca\u30c9\u5b9f\u7528\u306e\u65c5(1): \u30eb\u30fc\u30d7\u304b\u3089\u306eBreak","provider_name":"Hatena Blog","blog_url":"https://fumieval.hatenablog.com/","version":"1.0","url":"https://fumieval.hatenablog.com/entry/20121111/1352622590","description":"\u3068\u3066\u3082\u7c21\u5358\u3002Free(T)\u306b\u300c\u7d9a\u304d\u304c\u306a\u3044\u300d\u3068\u3044\u3046\u3053\u3068\u3092\u8868\u3059Functor\u3092\u306f\u3081\u308b\u3060\u3051\u3002 ex1\u306f\u3042\u308b\u6587\u5b57\u5217\u3092\u5165\u529b\u3059\u308b\u3068\u7d42\u4e86\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u3002 import Prelude hiding (break) import Control.Monad.Trans.Free import Control.Monad.Trans import Control.Monad data Zero a = Zero deriving (Show, Eq, Ord) instance Functor Zero where fmap _ _ = Zero type BreakT = FreeT Zero break :\u2026","provider_url":"https://hatena.blog","width":"100%","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ffumieval.hatenablog.com%2Fentry%2F20121111%2F1352622590\" title=\"Free\u30e2\u30ca\u30c9\u5b9f\u7528\u306e\u65c5(1): \u30eb\u30fc\u30d7\u304b\u3089\u306eBreak - \u30e2\u30ca\u30c9\u3068\u308f\u305f\u3057\u3068\u30b3\u30e2\u30ca\u30c9\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"\u30e2\u30ca\u30c9\u3068\u308f\u305f\u3057\u3068\u30b3\u30e2\u30ca\u30c9"}