{"image_url":null,"blog_title":"bouzuya.hatenablog.com","published":"2025-07-30 23:41:04","author_url":"https://blog.hatena.ne.jp/bouzuya/","author_name":"bouzuya","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fbouzuya.hatenablog.com%2Fentry%2F2025%2F07%2F30%2F234104\" title=\"Box&lt;dyn Error&gt; \u306e downcast \u306e\u8a18\u4e8b\u3092\u66f8\u3044\u305f - bouzuya.hatenablog.com\" 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","provider_url":"https://hatena.blog","type":"rich","description":"bouzuya/zenn \u306b\u8a18\u4e8b\u306e\u4e0b\u66f8\u304d\u3092\u8ffd\u52a0\u3057\u305f\u3002 Box<dyn Error> \u304b\u3089 downcast \u3067\u30a8\u30e9\u30fc\u3092\u53d6\u308a\u51fa\u305d\u3046\u3068\u3044\u3046\u8a18\u4e8b\u3002 bouzuya/rust-examples \u306b\u30b3\u30fc\u30c9\u7247\u3082\u7f6e\u3044\u305f\u3002 \u4eca\u65e5\u306e\u30b3\u30df\u30c3\u30c8\u3002 zenn 1 commit Add 2025-07-30 rust-examples 1 commit Add box-downcast googleapis-tonic 0 commit","title":"Box<dyn Error> \u306e downcast \u306e\u8a18\u4e8b\u3092\u66f8\u3044\u305f","categories":[],"provider_name":"Hatena Blog","version":"1.0","blog_url":"https://bouzuya.hatenablog.com/","width":"100%","url":"https://bouzuya.hatenablog.com/entry/2025/07/30/234104"}