{"published":"2018-03-18 00:43:39","version":"1.0","author_url":"https://blog.hatena.ne.jp/txttxt/","blog_title":"TXT.TXT","title":"\u30af\u30e9\u30b9\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u5f15\u6570\u63a8\u8ad6\u304c\u5165\u3063\u305f\u306e\u3067 false\u7684\u306a\u3082\u306e\u3092\u53d7\u3051\u53d6\u308b\u3068\u4f8b\u5916\u3092\u6295\u3052\u308b\u30af\u30e9\u30b9\u3092\u66f8\u3044\u3066\u307f\u305f","height":"190","author_name":"txttxt","categories":["C++"],"type":"rich","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftxt-txt.hateblo.jp%2Fentry%2F2018%2F03%2F18%2F004339\" title=\"\u30af\u30e9\u30b9\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u5f15\u6570\u63a8\u8ad6\u304c\u5165\u3063\u305f\u306e\u3067 false\u7684\u306a\u3082\u306e\u3092\u53d7\u3051\u53d6\u308b\u3068\u4f8b\u5916\u3092\u6295\u3052\u308b\u30af\u30e9\u30b9\u3092\u66f8\u3044\u3066\u307f\u305f - TXT.TXT\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"provider_url":"https://hatena.blog","description":"C++17\u3067 [https://cpprefjp.github.io/lang/cpp17/type_deduction_for_class_templates.html:title=\u30af\u30e9\u30b9\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u5f15\u6570\u63a8\u8ad6\u304c\u5165\u3063\u305f\u306e\u3067 \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067false\u7684\u306a\u3082\u306e\u3092\u53d7\u3051\u53d6\u308b\u3068\u4f8b\u5916\u3092\u6295\u3052\u308b\u30af\u30e9\u30b9\u3092\u66f8\u3044\u3066\u307f\u305f \u4f7f\u7528\u60f3\u5b9a \u30c6\u30b9\u30c8\u306a\u3069\u3067\u3001\u6ce8\u76ee\u5ea6\u306e\u4f4e\u3044\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u96d1\u306b\u51e6\u7406\u3059\u308b std::optional<Foo> make(int arg); Test(Foo_f_test_) { // make\u306f\u6210\u529f\u3059\u308b\u524d\u63d0\u3067\u66f8\u3044\u3066\u308b+make\u306f\u5225\u306e\u30c6\u30b9\u30c8\u3067\u3057\u3066\u3044\u308b\u306e\u3067 \u3053\u306e\u30c6\u30b9\u30c8\u3067make\u306e\u30a8\u30e9\u30fc\u51e6\u7406\u306f\u3042\u307e\u2026","blog_url":"https://txt-txt.hateblo.jp/","url":"https://txt-txt.hateblo.jp/entry/2018/03/18/004339","width":"100%"}