{"author_name":"yohhoy","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","version":"1.0","height":"190","type":"rich","width":"100%","url":"https://yohhoy.hatenadiary.jp/entry/20180320/p1","categories":["C++","C++2a"],"title":"C++\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u6642\u8a08(Clock)","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyohhoy.hatenadiary.jp%2Fentry%2F20180320%2Fp1\" title=\"C++\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u6642\u8a08(Clock) - yohhoy\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/yohhoy/","blog_url":"https://yohhoy.hatenadiary.jp/","blog_title":"yohhoy\u306e\u65e5\u8a18","published":"2018-03-20 00:00:00","image_url":null,"description":"C++2a(C++20)\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea <chrono> \u30d8\u30c3\u30c0\u306b\u8ffd\u52a0\u3055\u308c\u308b \u6642\u8a08(Clock) \u30af\u30e9\u30b9\u4e00\u89a7\u3002\u3044\u305a\u308c\u3082std::chrono\u540d\u524d\u7a7a\u9593\u306b\u5c5e\u3059\u308b\u3002 Clock \u6982\u8981 \u57fa\u70b9(epoch) \u3046\u308b\u3046\u79d2 system_clock \u30b7\u30b9\u30c6\u30e0\u30af\u30ed\u30c3\u30af\uff3bC++11\uff3d 1970-01-01 00:00:00 UTC \u9664\u5916 utc_clock \u5354\u5b9a\u4e16\u754c\u6642(UTC)\u30af\u30ed\u30c3\u30af 1970-01-01 00:00:00 UTC \u542b\u3081\u308b tai_clock \u56fd\u969b\u539f\u5b50\u6642(TAI)\u30af\u30ed\u30c3\u30af 1958-01-01 00:00:00 TAI*1 \u633f\u5165\u306a\u3057 gps_clock GPS\u30af\u30ed\u30c3\u30af 1980-01 \u7b2c1\u65e5\u66dc \u2026"}