{"blog_title":"Faith and Brave - C++\u3067\u904a\u307c\u3046","published":"2022-11-30 13:13:35","url":"https://faithandbrave.hateblo.jp/entry/2022/11/30/131335","description":"std::optional\u3068std::shared_ptr\u3092\u4e21\u65b9\u4f7f\u3063\u3066\u3044\u308b\u3068\u3001\u7a7a\u72b6\u614b\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u3042\u3063\u3061\u306fstd::nullopt\u3001\u3053\u3063\u3061\u306fnullptr\u306e\u3088\u3046\u306b\u6307\u5b9a\u3059\u308b\u306e\u3067\u3001\u4f7f\u3044\u5206\u3051\u304c\u308f\u305a\u3089\u308f\u3057\u3044\u3068\u304d\u304c\u3042\u308a\u307e\u3059\u3002 \u306a\u306b\u3082\u8003\u3048\u305a{}\u3092\u6307\u5b9a\u3057\u3066\u3082\u3088\u3044\u306e\u3067\u3059\u304c\u3001\u300c\u5024\u521d\u671f\u5316\u3068\u3044\u3046\u306e\u3067\u306f\u306a\u304f\u7a7a\u72b6\u614b\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3092\u793a\u3057\u305f\u3044\uff01\u300d\u3068\u3044\u3046\u6b32\u6c42\u304c\u3042\u308b\u306e\u3067\u3001std::optional\u3068std::shared_ptr\u4e21\u65b9\u306e\u7a7a\u72b6\u614b\u306b\u5909\u63db\u3067\u304d\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u3042\u308b\u3068\u4fbf\u5229\u304b\u306a\u3068\u601d\u3063\u305f\u308a\u3057\u307e\u3059\u3002 #include <optional> #include <memory> struct unified_null { temp\u2026","image_url":null,"author_name":"faith_and_brave","height":"190","blog_url":"https://faithandbrave.hateblo.jp/","categories":["C++"],"type":"rich","width":"100%","version":"1.0","author_url":"https://blog.hatena.ne.jp/faith_and_brave/","title":"optional\u3068shared_ptr\u3067\u5171\u901a\u306enull","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ffaithandbrave.hateblo.jp%2Fentry%2F2022%2F11%2F30%2F131335\" title=\"optional\u3068shared_ptr\u3067\u5171\u901a\u306enull - Faith and Brave - C++\u3067\u904a\u307c\u3046\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>"}