{"description":"\u8da3\u5473\u306e\u30a6\u30a7\u30d6\u30d6\u30e9\u30a6\u30b8\u30f3\u30b0\u3092\u3057\u3066\u3044\u308b\u3068\u3001Swift \u306e ?? (nil coalescing operator) \u304c\u30b3\u30f3\u30d1\u30a4\u30eb\u3092\u9045\u304f\u3059\u308b\u306e\u3067\u306f\u306a\u3044\u304b\u3001\u3068\u3044\u3063\u305f\u8a71\u984c*1\u3092\u898b\u304b\u3051\u307e\u3057\u305f\u3002\u3053\u306e\u6f14\u7b97\u5b50\u306f\u3001\u5de6\u8fba\u306e Optional<Wrapped> \u578b\u306e\u5024\u304c Optional.none \u3067\u3042\u308b\u5834\u5408\u306b\u53f3\u8fba\u306e\u5024\u3092\u8fd4\u3059\u3068\u3044\u3046\u3082\u306e\u3067\u3001\u76f4\u611f\u7684\u306b\u306f\u3053\u308c\u304c\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u9593\u3092\u60aa\u5316\u3055\u305b\u308b\u3068\u306f\u601d\u3048\u307e\u305b\u3093\u3002\u7d4c\u9a13\u304b\u3089\u8a00\u3048\u3070\u3001\u3053\u306e\u3088\u3046\u306a\u30b1\u30fc\u30b9\u3067\u306f\u5927\u62b5\u3084\u3084\u8907\u96d1\u306a\u578b\u63a8\u8ad6\u304c\u767a\u751f\u3057\u3066\u304a\u308a\u3001\u305d\u308c\u304c\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u9593\u306b\u652f\u914d\u7684\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u3066\u3044\u307e\u3059\u3002\u305d\u3046\u3067\u3042\u308b\u306a\u3089\u3001\u4eba\u9593\u304c\u5c11\u3057\u5de5\u592b\u3057\u3066\u578b\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u4e0e\u3048\u3066\u3084\u308b\u3053\u3068\u3067\u3001\u8a08\u7b97\u6a5f\u306f\u305a\u3063\u3068\u3088\u3044\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u2026","provider_url":"https://hatena.blog","image_url":null,"blog_url":"https://cockscomb.hatenablog.com/","url":"https://cockscomb.hatenablog.com/entry/does-the-nil-coalescing-operator-slow-down-swift-compiler","published":"2016-07-06 12:30:47","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fcockscomb.hatenablog.com%2Fentry%2Fdoes-the-nil-coalescing-operator-slow-down-swift-compiler\" title=\"Swift \u306e Nil Coalescing Operator \u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u306f\u9045\u304f\u306a\u308b\u304b - cockscomblog?\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","width":"100%","type":"rich","provider_name":"Hatena Blog","blog_title":"cockscomblog?","author_name":"cockscomb","version":"1.0","author_url":"https://blog.hatena.ne.jp/cockscomb/","title":"Swift \u306e Nil Coalescing Operator \u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u306f\u9045\u304f\u306a\u308b\u304b","categories":["Swift","Development"]}