{"image_url":null,"url":"https://sirocco.hatenadiary.org/entry/20111027/1319684292","published":"2011-10-27 11:58:12","author_name":"sirocco","blog_url":"https://sirocco.hatenadiary.org/","author_url":"https://blog.hatena.ne.jp/sirocco/","provider_name":"Hatena Blog","type":"rich","title":"Error Monad (Exception Monad)","blog_title":"sirocco \u306e\u66f8\u3044\u3066\u3082\u3059\u3050\u306b\u5fd8\u308c\u308b\u30e1\u30e2","categories":["Haskell"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsirocco.hatenadiary.org%2Fentry%2F20111027%2F1319684292\" title=\"Error Monad (Exception Monad) - sirocco \u306e\u66f8\u3044\u3066\u3082\u3059\u3050\u306b\u5fd8\u308c\u308b\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u30e2\u30ca\u30c9\u306e\u3059\u3079\u3066 Haskell \u306b\u304a\u3051\u308b\u30e2\u30ca\u30c9\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u7406\u8ad6\u3068\u5b9f\u8df5\u306b\u95a2\u3059\u308b\u5305\u62ec\u7684\u30ac\u30a4\u30c9\u306e Error \u30e2\u30ca\u30c9\u3092\u5199\u7d4c\u3057\u3066\u307f\u307e\u3057\u305f\u3002 import Monad import System import Control.Monad.Error import Char import Debug.Trace -- \u8868\u793a\u3067\u304d\u308b\u3088\u3046\u306b deriving Show\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002 data ParseError = Err {location::Int, reason::String} deriving Show instance Error ParseError where noMsg = Err 0 \u2026","width":"100%","version":"1.0","provider_url":"https://hatena.blog","height":"190"}