{"id":6788,"date":"2024-08-25T22:36:05","date_gmt":"2024-08-25T13:36:05","guid":{"rendered":"https:\/\/k.foolslab.net\/dailyreport\/?p=6788"},"modified":"2024-08-26T00:53:47","modified_gmt":"2024-08-25T15:53:47","slug":"2024-8-25","status":"publish","type":"post","link":"https:\/\/k.foolslab.net\/dailyreport\/2024-8-25\/","title":{"rendered":"2024\/8\/25(\u65e5)"},"content":{"rendered":"\n<p>\u30ed\u30fc\u30bc\u30f3\u30e1\u30a4\u30c7\u30f3\u3092\u8aad\u307f\u76f4\u3057\u9032\u3081\u3066\u3044\u308b\u3002\u4eca\u307e\u3067\u306e\u4e3b\u4eba\u305f\u3061\u3068\u6307\u8f2a\u306f\u3069\u3046\u306a\u3063\u3066\u305f\u306e\u3068\u3044\u3046\u8a71\u3001\u601d\u3044\u3063\u304d\u308a\u3061\u3083\u3093\u3068\u8aac\u660e\u3055\u308c\u3066\u3044\u305f\u3002\u8aad\u3093\u3060\u306e\u306b\u899a\u3048\u3066\u306a\u304b\u3063\u305f\u3002<\/p>\n\n\n\n<p>\u30c9\u30fc\u30eb\u304c\u6307\u8f2a\u3092\u5931\u3063\u305f\u3068\u304d\u3001\u30ed\u30fc\u30b6\u30df\u30b9\u30c6\u30a3\u30ab\u3092\u5225\u306e\u30c9\u30fc\u30eb\u306b\u5dee\u3057\u51fa\u3057\u305f\u5834\u5408\u306f\u305d\u306e\u5f8c\u6c38\u9060\u306b\u30b2\u30fc\u30e0\u3092\u964d\u308a\u308b\u3053\u3068\u306b\u306a\u308b\u3002\u4e00\u65b9\u3067\u305d\u3046\u3067\u306a\u304b\u3063\u305f\u5834\u5408\u3001\u9784\u306e\u4e2d\u3067\u7720\u3063\u3066\u9577\u3044\u6642\u9593\u3092\u304b\u3051\u3066\u6307\u8f2a\u3092\u518d\u69cb\u6210\u3067\u304d\u308b\u3002\u306a\u3093\u304b\u96db\u82fa\u304c\u6307\u8f2a\u3092\u5931\u3063\u305f\u30b7\u30fc\u30f3\u306e\u300c\u6557\u5317\uff01\u7d42\u308f\u308a\uff01\u300d\u7684\u306a\u5370\u8c61\u304c\u5f37\u3059\u304e\u3066\u5fd8\u308c\u3066\u3044\u305f\u304c\u3001\u6307\u8f2a\u306f\u518d\u3073\u4f5c\u308c\u308b\u306e\u3060\u3002\u7b2c1\u90e8\u958b\u59cb\u304b\u3089\u7d42\u4e86\u307e\u3067\u306b\u96db\u82fa\u3001\u84bc\u661f\u77f3\u3001\u771f\u7d05\u3001\u7fe0\u661f\u77f3\u304c\u6307\u8f2a\u3092\u5931\u3063\u3066\u304a\u308a\u3001\u84bc\u661f\u77f3\u3068\u771f\u7d05\u306f\u4f8b\u5916\u7684\u306b\u30ed\u30fc\u30bc\u30f3\u306e\u5e72\u6e09\u306b\u3088\u3063\u3066\u4e00\u7b49\u65e9\u304f\u6307\u8f2a\u3092\u518d\u69cb\u6210\u3057\u305f\u3068\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<p>\u7269\u8a9e\u958b\u59cb\u6642\u70b9\u30671\u4f53\u3082\u6b20\u3051\u3066\u3044\u306a\u304b\u3063\u305f\u3068\u3044\u3046\u3053\u3068\u306f\u4eca\u307e\u3067\u8ab0\u3082\u6557\u5317\u3067\u6307\u8f2a\u3092\u5931\u3063\u305f\u3053\u3068\u304c\u7121\u304b\u3063\u305f\u3068\u3044\u3046\u3053\u3068\u306b\u306a\u308b\u3002\u305d\u3046\u3044\u3048\u3070\u300c7\u4f53\u304c\u540c\u6642\u306b\u76ee\u899a\u3081\u305f\u300d\u3053\u3068\u306b\u9a5a\u3044\u3066\u3044\u305f\u306e\u3067\u305d\u3082\u305d\u3082\u8d77\u304d\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u304c\u63c3\u3046\u3053\u3068\u81ea\u4f53\u304c\u4e2d\u3005\u306a\u304b\u3063\u305f\u3089\u3057\u3044\u3002<\/p>\n\n\n\n<p>\u660e\u78ba\u306b\u66f8\u3044\u3066\u306f\u3044\u306a\u3044\u304c\u300c\u6307\u8f2a\u306f\u539f\u52471\u4f53\u306b\u3064\u304d1\u3064\u300d\u3068\u3044\u3046\u306e\u306f\u6050\u3089\u304f\u3001\u4eba\u9593\u306e\u5bff\u547d\u3068\u6307\u8f2a\u3092\u518d\u69cb\u6210\u3059\u308b\u306e\u306b\u304b\u304b\u308b\u6642\u9593\u306e\u90fd\u5408\u3067\u57fa\u672c\u7684\u306b\u306f\u305d\u3046\u306a\u308b\u304f\u3089\u3044\u306e\u30a4\u30e1\u30fc\u30b8\u306a\u3093\u3058\u3083\u306a\u3044\u304b\u3068\u60f3\u50cf\u3057\u3066\u3044\u308b\u3002\u3053\u3046\u3044\u3046\u4f55\u304b\u306b\u5229\u7528\u3067\u304d\u305d\u3046\u306a\u5fae\u5999\u306a\u30eb\u30fc\u30eb\u306e\u66d6\u6627\u3055\u3092\u63a2\u3059\u306e\u304c\u7d50\u69cb\u597d\u304d\u3002\u30aa\u30c7\u30a3\u30fc\u30eb\u3055\u3093\u306e\u6307\u8f2a\u306e\u4ef6\u306b\u3064\u3044\u3066\u300c\u3044\u3084\u5951\u7d04\u306e\u6761\u4ef6\u6e80\u305f\u3059\u306e\u7121\u7406\u3058\u3083\u306d\uff1f\u300d\u300cn\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u7d4c\u7531\u306a\u3089\u7269\u7406\u7684\u8ddd\u96e2\u95a2\u4fc2\u306a\u304f\u306d\uff1f\u300d\u300c\u307b\u306a&#8230;\u3044\u3051\u308b\u3093\u304b\u306a&#8230;\u300d\u307f\u305f\u3044\u306a\u4f1a\u8a71\u3068\u304b\u3002<\/p>\n\n\n\n<p>\u3068\u3053\u308d\u3067\u3001\u300c\u4eba\u5de5\u7cbe\u970a\u300d\u3068\u3044\u3046\u3082\u306e\u306e\u5b58\u5728\u306e\u7acb\u3061\u4f4d\u7f6e\u306b\u3064\u3044\u3066\u3088\u304f\u5206\u304b\u3089\u306a\u3044\u3067\u3044\u305f\u306e\u3060\u304c\u3001\u4eba\u5f62\u305f\u3061\u306e\u9020\u308a\u4e3b\u3067\u3042\u308b\u300c\u304a\u7236\u69d8\u300d\uff1d\u30ed\u30fc\u30bc\u30f3\u3092\u9020\u7269\u4e3b\uff1d\u795e\u3068\u3059\u308b\u898b\u7acb\u3066\u304c\u7d42\u76e4\u3067\u5f37\u8abf\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u8003\u3048\u308b\u3068\u3001\u540d\u524d\u304b\u3089\u3057\u3066\u30ad\u30ea\u30b9\u30c8\u6559\u306b\u304a\u3051\u308b\u8056\u970a\u306b\u3042\u305f\u308b\u3082\u306e\u3068\u3057\u3066\u63cf\u304b\u308c\u3066\u3044\u308b\u306e\u304b\u306a\u3068\u3044\u3046\u6c17\u304c\u3057\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>C++\u3067\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u7684\u306a\u3082\u306e\u3092\u3084\u308d\u3046\u3068\u601d\u3063\u305f\u3089<code>std::function<\/code>\u304c\u7b46\u982d\u306b\u4e0a\u304c\u308b\u304c\u3001\u305d\u308c\u304c\u3084\u305f\u3089\u9045\u3044\u3089\u3057\u3044\u3053\u3068\u306b\u3069\u3046\u306b\u3082\u7d0d\u5f97\u304c\u3044\u304b\u306a\u3044\u3002\u306e\u3067\u3001\u4ee3\u66ff\u3092\u8003\u3048\u3066\u307f\u305f\u3002<\/p>\n\n\n\n<p>\u8981\u3059\u308b\u306b\u3069\u306e\u95a2\u6570\u306a\u306e\u304b\u3068\u304b\u666e\u901a\u306e\u95a2\u6570\u306a\u306e\u304b\u95a2\u6570\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306a\u306e\u304b\u3068\u304b\u305d\u3046\u3044\u3046\u306e\u3092\u5b9f\u884c\u6642\u60c5\u5831\u3068\u3057\u3066\u6301\u3063\u3066\u3044\u308b\u306e\u304c\u3044\u304b\u3093\u306e\u3060\u3002\u578b\u60c5\u5831\u306b\u5168\u90e8\u9759\u7684\u306b\u57cb\u3081\u8fbc\u3093\u3067\u3057\u307e\u3048\u3070\u305d\u3093\u306a\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u306f\u751f\u3058\u5f97\u306a\u3044\u3002\u554f\u984c\u306f\u305d\u308c\u3092\u3044\u304b\u306b\u304d\u308c\u3044\u306b\u66f8\u3051\u308b\u304b\u3069\u3046\u304b\u3060\u3002<\/p>\n\n\n\n<p>\u9811\u5f35\u3063\u3066\u307f\u305f\u3068\u3053\u308d\u3001\u601d\u3063\u305f\u3088\u308a\u826f\u3044\u611f\u3058\u306b\u306a\u3063\u305f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream&gt;\n#include &lt;utility&gt;\n\ntemplate &lt;class Event, class Handler, class Parent, class Base&gt;\nclass EventHandlerContainer : public Parent {\n    Handler handler;\n\n  public:\n    EventHandlerContainer(Parent &amp;&amp;_parent, Handler &amp;&amp;_handler)\n        : Parent(std::move(_parent)), handler{std::move(_handler)} {}\n\n    template &lt;class TargetEvent, class... Args&gt;\n    auto call(Args &amp;&amp;...args) {\n        if constexpr (std::is_same_v&lt;TargetEvent, Event&gt;) {\n            return handler(std::forward&lt;decltype(args)&gt;(args)...);\n        } else if constexpr (std::is_same_v&lt;Parent, Base&gt;) {\n            return;\n        } else {\n            return this-&gt;Parent::call&lt;TargetEvent&gt;(std::forward&lt;decltype(args)&gt;(args)...);\n        }\n    };\n\n    template &lt;class NewEvent, class NewF&gt;\n    auto on(NewF &amp;&amp;f) &amp;&amp; {\n        using SelfType = EventHandlerContainer&lt;Event, Handler, Parent, Base&gt;;\n        using NewType = EventHandlerContainer&lt;NewEvent, NewF, SelfType, Base&gt;;\n        return NewType(std::move(*this), std::move(f));\n    }\n};\n\ntemplate &lt;class T&gt;\nclass EventHandlerBuilder {\n    T &amp;base;\n\n  public:\n    EventHandlerBuilder(T &amp;_base) : base(_base) {}\n\n    template &lt;class NewEvent, class NewF&gt;\n    auto on(NewF &amp;&amp;f) &amp;&amp; {\n        return EventHandlerContainer&lt;NewEvent, NewF, T, T&gt;(std::move(base), std::move(f));\n    }\n};\n\nclass Hoge : public EventHandlerBuilder&lt;Hoge&gt; {\n  public:\n    Hoge() : EventHandlerBuilder(*this) {}\n};\n\nstruct Ev1 {};\nstruct Ev2 {};\n\nint main() {\n    auto hoge =\n        Hoge{}\n            .on&lt;Ev1&gt;(&#91;](int a) {\n                std::cout &lt;&lt; \"Ev1: \" &lt;&lt; a &lt;&lt; std::endl;\n            })\n            .on&lt;Ev2&gt;(&#91;](double p, const char *q) {\n                std::cout &lt;&lt; \"Ev2: \" &lt;&lt; p &lt;&lt; ' ' &lt;&lt; q &lt;&lt; std::endl;\n            });\n\n    hoge.call&lt;Ev1&gt;(123);\n    hoge.call&lt;Ev2&gt;(3.14, \"Hello\");\n}<\/code><\/pre>\n\n\n\n<p><code>EventHandlerContainer<\/code>\u304a\u3088\u3073<code>EventHandlerBuilder<\/code>\u304c\u30ad\u30e2\u3060\u3002\u3053\u308c\u3089\u304c\u3042\u308c\u3070\u3001<code>class Hoge<\/code>\u306e\u5b9f\u88c5\u8005\u306f\u305d\u308c\u3089\u3092\u5229\u7528\u3059\u308b\u3060\u3051\u3067\u69d8\u3005\u306a\u30a4\u30d9\u30f3\u30c8\u306e\u30cf\u30f3\u30c9\u30e9\u306e\u8a2d\u5b9a\u6a5f\u80fd\u3092\u81ea\u4f5c\u306e\u30af\u30e9\u30b9\u306b\u5b9f\u88c5\u3067\u304d\u308b\u3002<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30ed\u30fc\u30bc\u30f3\u30e1\u30a4\u30c7\u30f3\u3092\u8aad\u307f\u76f4\u3057\u9032\u3081\u3066\u3044\u308b\u3002\u4eca\u307e\u3067\u306e\u4e3b\u4eba\u305f\u3061\u3068\u6307\u8f2a\u306f\u3069\u3046\u306a\u3063\u3066\u305f\u306e\u3068\u3044\u3046\u8a71\u3001\u601d\u3044\u3063\u304d\u308a\u3061\u3083\u3093\u3068\u8aac\u660e\u3055\u308c\u3066\u3044\u305f\u3002\u8aad\u3093\u3060\u306e\u306b\u899a\u3048\u3066\u306a\u304b\u3063\u305f\u3002 \u30c9\u30fc\u30eb\u304c\u6307\u8f2a\u3092\u5931\u3063\u305f\u3068\u304d\u3001\u30ed\u30fc\u30b6\u30df\u30b9\u30c6\u30a3\u30ab\u3092\u5225\u306e\u30c9\u30fc\u30eb\u306b\u5dee\u3057\u51fa\u3057\u305f\u5834\u5408\u306f &hellip; <\/p>\n<div><a href=\"https:\/\/k.foolslab.net\/dailyreport\/2024-8-25\/\" class=\"more\">Read more &raquo;<span class=\"screen-reader-text\"> &#8220;2024\/8\/25(\u65e5)&#8221;<\/span><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6788","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/k.foolslab.net\/dailyreport\/wp-json\/wp\/v2\/posts\/6788","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/k.foolslab.net\/dailyreport\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/k.foolslab.net\/dailyreport\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/k.foolslab.net\/dailyreport\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/k.foolslab.net\/dailyreport\/wp-json\/wp\/v2\/comments?post=6788"}],"version-history":[{"count":28,"href":"https:\/\/k.foolslab.net\/dailyreport\/wp-json\/wp\/v2\/posts\/6788\/revisions"}],"predecessor-version":[{"id":6821,"href":"https:\/\/k.foolslab.net\/dailyreport\/wp-json\/wp\/v2\/posts\/6788\/revisions\/6821"}],"wp:attachment":[{"href":"https:\/\/k.foolslab.net\/dailyreport\/wp-json\/wp\/v2\/media?parent=6788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/k.foolslab.net\/dailyreport\/wp-json\/wp\/v2\/categories?post=6788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/k.foolslab.net\/dailyreport\/wp-json\/wp\/v2\/tags?post=6788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}