{"author_url":"https://blog.hatena.ne.jp/higepon/","type":"rich","author_name":"higepon","image_url":null,"published":"2007-03-23 23:15:50","width":"100%","url":"https://higepon.hatenablog.com/entry/20070323/1174659350","title":" \u30a2\u30ca\u30d5\u30a9\u30ea\u30c3\u30af\u30de\u30af\u30ed1 - On Lisp","provider_name":"Hatena Blog","version":"1.0","provider_url":"https://hatena.blog","categories":["scheme"],"blog_title":"higepon blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhigepon.hatenablog.com%2Fentry%2F20070323%2F1174659350\" title=\" \u30a2\u30ca\u30d5\u30a9\u30ea\u30c3\u30af\u30de\u30af\u30ed1 - On Lisp - higepon blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://higepon.hatenablog.com/","description":"On Lisp\u3067\u3001\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u52c9\u5f37\u3057\u3088\u3046\u3068\u601d\u3063\u305f\u3089 acond2 \u306b\u3042\u305f\u3063\u305f\u3002 \u306e\u3067\u52c9\u5f37\u3057\u307e\u3059\u3088\u3002 aif \u307e\u305a\u306f\u3001\u9593\u9055\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u304b\u3089\u3002 (define-syntax aif (syntax-rules () ((_ a b c ...) (let ((it a)) (if it b c ...))))) (aif 3 (display it) (display \"not 3\")) Gauche \u3067\u5b9f\u884c\u3059\u308b\u3068\u300cunbound variable: it\u300d\u3068\u6012\u3089\u308c\u307e\u3059\u3002 Rui\u3055\u3093\u306b\u6559\u3048\u3066\u3044\u305f\u3060\u3044\u3066\u6c17\u3065\u3044\u305f\u306e\u3067\u3059\u304c\u3001hygienic\u306a\u30de\u30af\u30ed\u306a\u306e\u3067\u5f53\u7136\u3067\u3059\u306d\u3002 \u306a\u306e\u3067\u6b63\u89e3\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002 (defi\u2026","height":"190"}