{"provider_name":"Hatena Blog","categories":["Essentials of Programming Languages","OCaml","\u8a00\u8a9e\u51e6\u7406\u7cfb"],"blog_title":"Arantium Maestum","author_url":"https://blog.hatena.ne.jp/zehnpaard/","description":"\u578b\u306a\u3057\u306eLETREC\u3001\u578b\u691c\u67fb\u306eCHECKED\u3068\u304d\u3066\u3001\u3064\u3044\u306b\u578b\u63a8\u8ad6\u304c\u3067\u304d\u308bINFERRED\u306e\u5b9f\u88c5\u306b\u79fb\u308b\u3002 github.com \u8a00\u8a9e\u4ed5\u69d8\u306e\u5909\u66f4 \u524d\u56de\u306eCHECKED\u3067\u306f letrec int double(x : int) = if zero?(x) then 0 else -((double -(x, 1)), -(0, 2)) in (double 6) \u306e\u3088\u3046\u306b\u95a2\u6570\u306e\u4eee\u5f15\u6570\u306e\u578b\u3068\u3001\u518d\u5e30\u95a2\u6570\u306e\u623b\u308a\u5024\u306e\u578b\u3092\u660e\u793a\u7684\u306b\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u3063\u305f\u3002 INFERRED\u3067\u306f\u578b\u6ce8\u91c8\u306e\u90e8\u5206\u306b\u300c?\u300d\u3092\u5165\u308c\u308b\u3053\u3068\u3067\u3001\u578b\u3092\u30d7\u30ed\u30b0\u30e9\u30de\u304c\u6307\u5b9a\u305b\u305a\u306b\u8a00\u8a9e\u5074\u3067\u63a8\u8ad6\u3059\u308b\u3088\u3046\u306b\u3067\u304d\u308b\uff1a letrec ? double(x : ?)\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fzehnpaard.hatenablog.com%2Fentry%2F2019%2F07%2F01%2F102918\" title=\"\u578b\u63a8\u8ad6\u3092\u5b9f\u88c5\u3059\u308b\u3000\u305d\u306e\uff13\u3000\uff08\u578b\u63a8\u8ad6\u306e\u3042\u308b\u8a00\u8a9e\u3092\u4f5c\u308b\uff09 - Arantium Maestum\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2019-07-01 10:29:18","image_url":null,"version":"1.0","blog_url":"https://zehnpaard.hatenablog.com/","width":"100%","provider_url":"https://hatena.blog","height":"190","url":"https://zehnpaard.hatenablog.com/entry/2019/07/01/102918","author_name":"zehnpaard","type":"rich","title":"\u578b\u63a8\u8ad6\u3092\u5b9f\u88c5\u3059\u308b\u3000\u305d\u306e\uff13\u3000\uff08\u578b\u63a8\u8ad6\u306e\u3042\u308b\u8a00\u8a9e\u3092\u4f5c\u308b\uff09"}