{"id":1751,"date":"2025-03-24T08:49:59","date_gmt":"2025-03-23T23:49:59","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1751"},"modified":"2025-03-24T08:49:59","modified_gmt":"2025-03-23T23:49:59","slug":"c%e3%83%a9%e3%83%a0%e3%83%80%e5%bc%8f%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%ef%bc%9a%e5%ae%9f%e8%b7%b5%e7%9a%84%e3%81%aa7%e3%81%a4%e3%81%ae%e6%b4%bb%e7%94%a8%e3%83%91%e3%82%bf%e3%83%bc","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1751","title":{"rendered":"C++\u30e9\u30e0\u30c0\u5f0f\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a\u5b9f\u8df5\u7684\u306a7\u3064\u306e\u6d3b\u7528\u30d1\u30bf\u30fc\u30f3\u3068\u6027\u80fd\u6700\u9069\u5316\u306e\u30b3\u30c4"},"content":{"rendered":"\n<div class=\"toc\"><br \/>\n<b>Warning<\/b>:  Undefined array key \"is_admin\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>116<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_category_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>121<\/b><br \/>\n<br \/>\n<b>Warning<\/b>:  Undefined array key \"is_top\" in <b>\/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/sango-theme\/library\/gutenberg\/dist\/classes\/Toc.php<\/b> on line <b>128<\/b><br \/>\n    <div id=\"toc_container\" class=\"sgb-toc--bullets js-smooth-scroll\" data-dialog-title=\"\u76ee\u6b21\">\n      <p class=\"toc_title\">\u76ee\u6b21 <\/p>\n      <ul class=\"toc_list\">  <li class=\"first\">    <a href=\"#i-0\">C++\u30e9\u30e0\u30c0\u5f0f\u3068\u306f\uff1a\u57fa\u790e\u304b\u3089\u7406\u89e3\u3059\u308b\u65b0\u3057\u3044\u95a2\u6570\u5b9a\u7fa9\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u5f93\u6765\u306e\u95a2\u6570\u5b9a\u7fa9\u3068\u30e9\u30e0\u30c0\u5f0f\u306e\u9055\u3044\u3092\u7406\u89e3\u3057\u3088\u3046<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">\u30e9\u30e0\u30c0\u5f0f\u304c\u5c0e\u5165\u3055\u308c\u305f\u80cc\u666f\u3068\u89e3\u6c7a\u3067\u304d\u308b\u8ab2\u984c<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">\u30e9\u30e0\u30c0\u5f0f\u306e\u57fa\u672c\u6587\u6cd5\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">\u30e9\u30e0\u30c0\u5f0f\u306e\u69cb\u6587\u8981\u7d20\u3092\u8a73\u3057\u304f\u89e3\u8aac<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-5\">\u30ad\u30e3\u30d7\u30c1\u30e3\u30ea\u30b9\u30c8\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9\u3068\u6ce8\u610f\u70b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-6\">\u5b9f\u8df5\u3067\u6d3b\u304d\u308b\uff017\u3064\u306e\u30e9\u30e0\u30c0\u5f0f\u6d3b\u7528\u30d1\u30bf\u30fc\u30f3<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-7\">STL\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u5a01\u529b\u3092\u767a\u63ee<\/a>      <\/li>      <li>        <a href=\"#i-8\">\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u30a8\u30ec\u30ac\u30f3\u30c8\u306b\u5b9f\u88c5<\/a>      <\/li>      <li>        <a href=\"#i-9\">\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u3067\u306e\u6d3b\u7528\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-10\">\u30b9\u30b3\u30fc\u30d7\u3092\u9650\u5b9a\u3057\u305f\u4e00\u6642\u7684\u306a\u95a2\u6570\u5b9a\u7fa9<\/a>      <\/li>      <li>        <a href=\"#i-11\">\u4e26\u5217\u51e6\u7406\u3067\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li>        <a href=\"#i-12\">\u30e1\u30f3\u30d0\u95a2\u6570\u5185\u3067\u306e\u30ed\u30fc\u30ab\u30eb\u95a2\u6570\u5b9a\u7fa9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-13\">\u95a2\u6570\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4ee3\u66ff\u3068\u3057\u3066\u306e\u4f7f\u7528\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-14\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u5927\u5316\u3059\u308b\u30e9\u30e0\u30c0\u5f0f\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-15\">\u30ad\u30e3\u30d7\u30c1\u30e3\u65b9\u6cd5\u306b\u3088\u308b\u6027\u80fd\u3078\u306e\u5f71\u97ff<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-16\">\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u3068\u30e9\u30e0\u30c0\u5f0f\u306e\u95a2\u4fc2\u6027<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-17\">\u30e9\u30e0\u30c0\u5f0f\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u30d0\u30b0\u3068\u5bfe\u51e6\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-18\">\u30c0\u30f3\u30b0\u30ea\u30f3\u30b0\u53c2\u7167\u3092\u9632\u3050\u30ad\u30e3\u30d7\u30c1\u30e3\u306e\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-20\">C++20\u4ee5\u964d\u3067\u306e\u9032\u5316\u3057\u305f\u30e9\u30e0\u30c0\u5f0f\u306e\u65b0\u6a5f\u80fd<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-21\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e9\u30e0\u30c0\u306e\u6d3b\u7528\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-22\">constexpr\u30e9\u30e0\u30c0\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/a>      <\/li>    <\/ul>  <\/li><\/ul>\n      <a href=\"#\" class=\"sgb-toc-button js-toc-button\" rel=\"nofollow\" data-open-dialog=\"true\"><i class=\"fa fa-list\"><\/i><span class=\"sgb-toc-button__text\">\u76ee\u6b21\u3078<\/span><\/a>\n    <\/div><\/div><h2 class=\"wp-block-heading\" id=\"i-0\">C++\u30e9\u30e0\u30c0\u5f0f\u3068\u306f\uff1a\u57fa\u790e\u304b\u3089\u7406\u89e3\u3059\u308b\u65b0\u3057\u3044\u95a2\u6570\u5b9a\u7fa9\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u5f93\u6765\u306e\u95a2\u6570\u5b9a\u7fa9\u3068\u30e9\u30e0\u30c0\u5f0f\u306e\u9055\u3044\u3092\u7406\u89e3\u3057\u3088\u3046<\/h3>\n\n\n\n<p>C++11\u3067\u5c0e\u5165\u3055\u308c\u305f\u30e9\u30e0\u30c0\u5f0f\u306f\u3001\u95a2\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u3092\u7c21\u6f54\u306b\u5b9a\u7fa9\u3067\u304d\u308b\u5f37\u529b\u306a\u6a5f\u80fd\u3067\u3059\u3002\u5f93\u6765\u306e\u95a2\u6570\u5b9a\u7fa9\u3068\u6bd4\u8f03\u3057\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7279\u5fb4\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5f93\u6765\u306e\u95a2\u6570\u5b9a\u7fa9\nbool traditional_compare(int a, int b) {\n    return a &lt; b;\n}\n\n\/\/ \u540c\u3058\u6a5f\u80fd\u3092\u30e9\u30e0\u30c0\u5f0f\u3067\u5b9f\u88c5\nauto lambda_compare = [](int a, int b) { return a &lt; b; };<\/pre>\n\n\n\n<p>\u30e9\u30e0\u30c0\u5f0f\u306e\u4e3b\u306a\u5229\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u8a18\u8ff0\u5834\u6240\u3067\u76f4\u63a5\u95a2\u6570\u3092\u5b9a\u7fa9\u3067\u304d\u308b<\/li>\n\n\n\n<li>\u4e00\u6642\u7684\u306a\u4f7f\u7528\u306b\u6700\u9069<\/li>\n\n\n\n<li>\u72b6\u614b\u306e\u30ad\u30e3\u30d7\u30c1\u30e3\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>STL\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u306e\u89aa\u548c\u6027\u304c\u9ad8\u3044<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u30e9\u30e0\u30c0\u5f0f\u304c\u5c0e\u5165\u3055\u308c\u305f\u80cc\u666f\u3068\u89e3\u6c7a\u3067\u304d\u308b\u8ab2\u984c<\/h3>\n\n\n\n<p>\u30e9\u30e0\u30c0\u5f0f\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8ab2\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u306e\u5c40\u6240\u6027\u5411\u4e0a<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;int&gt; numbers = {1, 2, 3, 4, 5};\n\/\/ \u5f93\u6765\u306e\u65b9\u6cd5\u3067\u306f\u3001\u6bd4\u8f03\u95a2\u6570\u3092\u5225\u306e\u5834\u6240\u306b\u5b9a\u7fa9\u3059\u308b\u5fc5\u8981\u304c\u3042\u3063\u305f\nstd::sort(numbers.begin(), numbers.end(), \n    [](int a, int b) { return std::abs(a) &lt; std::abs(b); }  \/\/ \u305d\u306e\u5834\u3067\u6bd4\u8f03\u30ed\u30b8\u30c3\u30af\u3092\u5b9a\u7fa9\n);<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u72b6\u614b\u306e\u30ad\u30e3\u30d7\u30c1\u30e3\u306b\u3088\u308b\u67d4\u8edf\u306a\u5b9f\u88c5<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">int threshold = 10;\n\/\/ threshold\u306e\u5024\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3066\u5229\u7528\nauto is_above_threshold = [threshold](int value) { return value &gt; threshold; };<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306e\u7c21\u6f54\u306a\u5b9f\u88c5<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class Button {\npublic:\n    void setClickHandler(std::function&lt;void()&gt; handler) {\n        onClick = handler;\n    }\nprivate:\n    std::function&lt;void()&gt; onClick;\n};\n\nButton btn;\nint clickCount = 0;\n\/\/ \u30af\u30ea\u30c3\u30af\u6642\u306e\u52d5\u4f5c\u3092\u30e9\u30e0\u30c0\u5f0f\u3067\u7c21\u6f54\u306b\u5b9a\u7fa9\nbtn.setClickHandler([&amp;clickCount]() { \n    ++clickCount; \n    std::cout &lt;&lt; \"Clicked: \" &lt;&lt; clickCount &lt;&lt; \" times\\n\"; \n});<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6a5f\u80fd\u306b\u3088\u308a\u3001\u30e2\u30c0\u30f3C++\u3067\u306f\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u5f93\u6765\u306f\u95a2\u6570\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\uff08\u30d5\u30a1\u30f3\u30af\u30bf\uff09\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u3063\u305f\u5834\u9762\u3067\u3082\u3001\u30e9\u30e0\u30c0\u5f0f\u3092\u4f7f\u3046\u3053\u3068\u3067\u7c21\u6f54\u306b\u5b9f\u88c5\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u30e9\u30e0\u30c0\u5f0f\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5834\u9762\u3067\u7279\u306b\u5a01\u529b\u3092\u767a\u63ee\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u6761\u4ef6\u6307\u5b9a<\/li>\n\n\n\n<li>\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u306e\u5b9f\u88c5<\/li>\n\n\n\n<li>\u975e\u540c\u671f\u51e6\u7406\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af<\/li>\n\n\n\n<li>\u30b9\u30b3\u30fc\u30d7\u3092\u9650\u5b9a\u3057\u305f\u4e00\u6642\u7684\u306a\u51e6\u7406\u306e\u5b9f\u88c5<\/li>\n<\/ul>\n\n\n\n<p>\u30e9\u30e0\u30c0\u5f0f\u3092\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u3067\u3001\u3088\u308a\u8aad\u307f\u3084\u3059\u304f\u3001\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">\u30e9\u30e0\u30c0\u5f0f\u306e\u57fa\u672c\u6587\u6cd5\u3092\u30de\u30b9\u30bf\u30fc\u3059\u308b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u30e9\u30e0\u30c0\u5f0f\u306e\u69cb\u6587\u8981\u7d20\u3092\u8a73\u3057\u304f\u89e3\u8aac<\/h3>\n\n\n\n<p>\u30e9\u30e0\u30c0\u5f0f\u306f\u4ee5\u4e0b\u306e\u69cb\u6587\u8981\u7d20\u304b\u3089\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">[ \u30ad\u30e3\u30d7\u30c1\u30e3\u30ea\u30b9\u30c8 ] ( \u30d1\u30e9\u30e1\u30fc\u30bf\u30ea\u30b9\u30c8 ) mutable constexpr noexcept -&gt; \u623b\u308a\u5024\u578b { \u95a2\u6570\u306e\u672c\u4f53 }<\/pre>\n\n\n\n<p>\u5404\u8981\u7d20\u306e\u8a73\u7d30\u306a\u8aac\u660e\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30ad\u30e3\u30d7\u30c1\u30e3\u30ea\u30b9\u30c8 <code>[ ]<\/code><\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e9\u30e0\u30c0\u5f0f\u306e\u5916\u5074\u306e\u5909\u6570\u3092\u3069\u306e\u3088\u3046\u306b\u53d6\u308a\u8fbc\u3080\u304b\u3092\u6307\u5b9a<\/li>\n\n\n\n<li>\u7a7a\u306e\u30ad\u30e3\u30d7\u30c1\u30e3\u30ea\u30b9\u30c8\u306f\u5916\u90e8\u5909\u6570\u3092\u4f7f\u7528\u3057\u306a\u3044\u3053\u3068\u3092\u610f\u5473<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30e9\u30e1\u30fc\u30bf\u30ea\u30b9\u30c8 <code>( )<\/code><\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u901a\u5e38\u306e\u95a2\u6570\u3068\u540c\u3058\u3088\u3046\u306b\u5f15\u6570\u3092\u5b9a\u7fa9<\/li>\n\n\n\n<li>\u5f15\u6570\u304c\u306a\u3044\u5834\u5408\u306f\u7701\u7565\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4fee\u98fe\u5b50\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>mutable<\/code>: \u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u305f\u5909\u6570\u306e\u5909\u66f4\u3092\u8a31\u53ef<\/li>\n\n\n\n<li><code>constexpr<\/code>: \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u8a55\u4fa1\u53ef\u80fd<\/li>\n\n\n\n<li><code>noexcept<\/code>: \u4f8b\u5916\u3092\u6295\u3052\u306a\u3044\u3053\u3068\u3092\u4fdd\u8a3c<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u623b\u308a\u5024\u578b\uff08\u30aa\u30d7\u30b7\u30e7\u30f3\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>-&gt;<\/code> \u306e\u5f8c\u306b\u578b\u3092\u6307\u5b9a<\/li>\n\n\n\n<li>\u591a\u304f\u306e\u5834\u5408\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u63a8\u8ad6\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u30ad\u30e3\u30d7\u30c1\u30e3\u30ea\u30b9\u30c8\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9\u3068\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5024\u30ad\u30e3\u30d7\u30c1\u30e3 <code>[=]<\/code><\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">int multiplier = 10;\nauto multiply = [=](int x) { return x * multiplier; };  \/\/ multiplier\u3092\u30b3\u30d4\u30fc\u3067\u53d6\u308a\u8fbc\u3080<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u53c2\u7167\u30ad\u30e3\u30d7\u30c1\u30e3 <code>[&amp;]<\/code><\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">int counter = 0;\nauto increment = [&amp;]() { ++counter; };  \/\/ counter\u3092\u53c2\u7167\u3067\u53d6\u308a\u8fbc\u3080<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u7279\u5b9a\u306e\u5909\u6570\u306e\u30ad\u30e3\u30d7\u30c1\u30e3<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">int a = 1, b = 2;\n\/\/ a\u306f\u5024\u3067\u3001b\u306f\u53c2\u7167\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\nauto lambda = [a, &amp;b]() { b += a; };<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u30c7\u30d5\u30a9\u30eb\u30c8\u3068\u500b\u5225\u6307\u5b9a\u306e\u7d44\u307f\u5408\u308f\u305b<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">int x = 1, y = 2, z = 3;\n\/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u5024\u30ad\u30e3\u30d7\u30c1\u30e3\u3001y\u306e\u307f\u53c2\u7167\u30ad\u30e3\u30d7\u30c1\u30e3\nauto lambda = [=, &amp;y]() { y += x + z; };<\/pre>\n\n\n\n<p>\u30ad\u30e3\u30d7\u30c1\u30e3\u6642\u306e\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30c0\u30f3\u30b0\u30ea\u30f3\u30b0\u30ec\u30d5\u30a1\u30ec\u30f3\u30b9\u306e\u9632\u6b62<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::function&lt;int()&gt; dangerous() {\n    int local = 42;\n    \/\/ \u8b66\u544a\uff1a\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u3068\u5371\u967a\n    return [&amp;local]() { return local; };  \/\/ local\u306f\u30b9\u30b3\u30fc\u30d7\u3092\u629c\u3051\u308b\u3068\u7121\u52b9\u306b\n}\n\n\/\/ \u6b63\u3057\u3044\u4f7f\u7528\u6cd5\nstd::function&lt;int()&gt; safe() {\n    int local = 42;\n    return [local]() { return local; };  \/\/ \u5024\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30e1\u30f3\u30d0\u5909\u6570\u306e\u30ad\u30e3\u30d7\u30c1\u30e3<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class Widget {\n    int value = 42;\npublic:\n    auto getValue() {\n        \/\/ this\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3066\u30e1\u30f3\u30d0\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\n        return [this]() { return value; };\n    }\n};<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u521d\u671f\u5316\u30ad\u30e3\u30d7\u30c1\u30e3\uff08C++14\u4ee5\u964d\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::unique_ptr&lt;int&gt; ptr(new int(10));\n\/\/ \u6240\u6709\u6a29\u306e\u79fb\u52d5\nauto lambda = () { return *value; };<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u69cb\u9020\u5316\u675f\u7e1b\u306e\u30ad\u30e3\u30d7\u30c1\u30e3\uff08C++17\u4ee5\u964d\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">struct Point { int x, y; };\nPoint p{1, 2};\nauto lambda = [p = p]() { return p.x + p.y; };<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u57fa\u672c\u6587\u6cd5\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u67d4\u8edf\u3067\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u7279\u306b\u53c2\u7167\u30ad\u30e3\u30d7\u30c1\u30e3\u3092\u4f7f\u7528\u3059\u308b\u969b\u306f\u3001\u5909\u6570\u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u306b\u6ce8\u610f\u3092\u6255\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-6\">\u5b9f\u8df5\u3067\u6d3b\u304d\u308b\uff017\u3064\u306e\u30e9\u30e0\u30c0\u5f0f\u6d3b\u7528\u30d1\u30bf\u30fc\u30f3<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">STL\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u3067\u5a01\u529b\u3092\u767a\u63ee<\/h3>\n\n\n\n<p>STL\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u30e9\u30e0\u30c0\u5f0f\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u7279\u306b\u5f37\u529b\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">std::vector&lt;User&gt; users = getUserList();\n\n\/\/ 1. \u6761\u4ef6\u306b\u57fa\u3065\u304f\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\nauto active_users = std::count_if(users.begin(), users.end(),\n    [](const User&amp; user) { return user.isActive(); });\n\n\/\/ 2. \u30ab\u30b9\u30bf\u30e0\u30bd\u30fc\u30c8\nstd::sort(users.begin(), users.end(),\n    [](const User&amp; a, const User&amp; b) { \n        return a.getLastLoginTime() &gt; b.getLastLoginTime(); \n    });\n\n\/\/ 3. \u8981\u7d20\u306e\u5909\u63db\nstd::vector&lt;std::string&gt; userNames;\nstd::transform(users.begin(), users.end(), \n    std::back_inserter(userNames),\n    [](const User&amp; user) { return user.getName(); });<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3092\u30a8\u30ec\u30ac\u30f3\u30c8\u306b\u5b9f\u88c5<\/h3>\n\n\n\n<p>\u975e\u540c\u671f\u51e6\u7406\u3084\u30a4\u30d9\u30f3\u30c8\u99c6\u52d5\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306e\u6d3b\u7528\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class NetworkClient {\npublic:\n    void fetchData(\n        std::string_view url,\n        std::function&lt;void(const Response&amp;)&gt; onSuccess,\n        std::function&lt;void(const Error&amp;)&gt; onError\n    ) {\n        \/\/ \u5b9f\u88c5\u7701\u7565\n    }\n};\n\nNetworkClient client;\nResponse::Status expectedStatus = Response::OK;\n\n\/\/ \u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3092\u30e9\u30e0\u30c0\u5f0f\u3067\u7c21\u6f54\u306b\u5b9a\u7fa9\nclient.fetchData(\"api\/users\",\n    [expectedStatus](const Response&amp; res) {\n        if (res.status == expectedStatus) {\n            std::cout &lt;&lt; \"Data received: \" &lt;&lt; res.data &lt;&lt; '\\n';\n        }\n    },\n    [](const Error&amp; err) {\n        std::cerr &lt;&lt; \"Error: \" &lt;&lt; err.message &lt;&lt; '\\n';\n    }\n);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u3067\u306e\u6d3b\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>GUI\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306e\u30a4\u30d9\u30f3\u30c8\u51e6\u7406\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class Button {\npublic:\n    using ClickHandler = std::function&lt;void()&gt;;\n    void setOnClick(ClickHandler handler) {\n        onClick = std::move(handler);\n    }\n\n    void click() { if(onClick) onClick(); }\n\nprivate:\n    ClickHandler onClick;\n};\n\n\/\/ \u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u306e\u5b9f\u88c5\nButton saveButton;\nint saveCount = 0;\nsaveButton.setOnClick([&amp;saveCount]() {\n    ++saveCount;\n    std::cout &lt;&lt; \"Save operation performed \" &lt;&lt; saveCount &lt;&lt; \" times\\n\";\n});<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u30b9\u30b3\u30fc\u30d7\u3092\u9650\u5b9a\u3057\u305f\u4e00\u6642\u7684\u306a\u95a2\u6570\u5b9a\u7fa9<\/h3>\n\n\n\n<p>\u7279\u5b9a\u306e\u30b9\u30b3\u30fc\u30d7\u3067\u306e\u307f\u4f7f\u7528\u3059\u308b\u95a2\u6570\u306e\u5b9a\u7fa9\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">void processData(const std::vector&lt;int&gt;&amp; data) {\n    \/\/ \u3053\u306e\u30b9\u30b3\u30fc\u30d7\u3067\u306e\u307f\u6709\u52b9\u306a\u5909\u63db\u95a2\u6570\n    auto transformValue = [factor = calculateFactor()](int value) {\n        return value * factor + offset();\n    };\n\n    std::vector&lt;int&gt; transformed;\n    std::transform(data.begin(), data.end(),\n        std::back_inserter(transformed),\n        transformValue);\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u4e26\u5217\u51e6\u7406\u3067\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>\u4e26\u5217\u51e6\u7406\u3067\u306e\u30e9\u30e0\u30c0\u5f0f\u306e\u6d3b\u7528\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;thread&gt;\n#include &lt;future&gt;\n\nstd::vector&lt;int&gt; data = {1, 2, 3, 4, 5};\nint threshold = 10;\n\n\/\/ \u975e\u540c\u671f\u30bf\u30b9\u30af\u306e\u5b9a\u7fa9\nauto future = std::async(std::launch::async,\n    [data = std::move(data), threshold]() {\n        return std::count_if(data.begin(), data.end(),\n            [threshold](int value) { return value &gt; threshold; });\n    }\n);\n\n\/\/ \u7d50\u679c\u306e\u53d6\u5f97\nint count = future.get();<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u30e1\u30f3\u30d0\u95a2\u6570\u5185\u3067\u306e\u30ed\u30fc\u30ab\u30eb\u95a2\u6570\u5b9a\u7fa9<\/h3>\n\n\n\n<p>\u30af\u30e9\u30b9\u30e1\u30f3\u30d0\u95a2\u6570\u5185\u3067\u306e\u4e00\u6642\u7684\u306a\u51e6\u7406\u306e\u5b9a\u7fa9\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DataProcessor {\n    std::vector&lt;int&gt; data;\npublic:\n    void process() {\n        \/\/ \u30e1\u30f3\u30d0\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u4e00\u6642\u7684\u306a\u51e6\u7406\u95a2\u6570\n        auto validateAndTransform = [this](int value) {\n            if (isValid(value)) {\n                return transform(value);\n            }\n            return defaultValue();\n        };\n\n        std::transform(data.begin(), data.end(), data.begin(),\n            validateAndTransform);\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u95a2\u6570\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4ee3\u66ff\u3068\u3057\u3066\u306e\u4f7f\u7528\u6cd5<\/h3>\n\n\n\n<p>\u5f93\u6765\u306e\u95a2\u6570\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30e9\u30e0\u30c0\u5f0f\u3067\u7f6e\u304d\u63db\u3048\u308b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5f93\u6765\u306e\u95a2\u6570\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\nstruct Multiplier {\n    int factor;\n    Multiplier(int f) : factor(f) {}\n    int operator()(int x) const { return x * factor; }\n};\n\n\/\/ \u30e9\u30e0\u30c0\u5f0f\u306b\u3088\u308b\u5b9f\u88c5\nauto createMultiplier = [](int factor) {\n    return [factor](int x) { return x * factor; };\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nauto multiplyBy2 = createMultiplier(2);\nauto multiplyBy3 = createMultiplier(3);\n\nstd::cout &lt;&lt; multiplyBy2(5) &lt;&lt; '\\n';  \/\/ \u51fa\u529b: 10\nstd::cout &lt;&lt; multiplyBy3(5) &lt;&lt; '\\n';  \/\/ \u51fa\u529b: 15<\/pre>\n\n\n\n<p>\u5404\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u5909\u6570\u306e\u30e9\u30a4\u30d5\u30bf\u30a4\u30e0\u306b\u6ce8\u610f<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u52b9\u7387\u3092\u8003\u616e\u3057\u305f\u30ad\u30e3\u30d7\u30c1\u30e3\u65b9\u6cd5\u306e\u9078\u629e<\/li>\n\n\n\n<li>\u4e26\u5217\u51e6\u7406\u3067\u306e\u5909\u6570\u306e\u5171\u6709\u306b\u6ce8\u610f<\/li>\n\n\n\n<li>\u518d\u5229\u7528\u6027\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8868\u73fe\u529b\u8c4a\u304b\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-14\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u5927\u5316\u3059\u308b\u30e9\u30e0\u30c0\u5f0f\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u30ad\u30e3\u30d7\u30c1\u30e3\u65b9\u6cd5\u306b\u3088\u308b\u6027\u80fd\u3078\u306e\u5f71\u97ff<\/h3>\n\n\n\n<p>\u30ad\u30e3\u30d7\u30c1\u30e3\u65b9\u6cd5\u306e\u9078\u629e\u306f\u3001\u30e9\u30e0\u30c0\u5f0f\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6bd4\u8f03\u306e\u305f\u3081\u306e\u8a08\u6e2c\u95a2\u6570\ntemplate&lt;typename Func&gt;\ndouble measurePerformance(Func f, int iterations) {\n    auto start = std::chrono::high_resolution_clock::now();\n    for(int i = 0; i &lt; iterations; ++i) {\n        f();\n    }\n    auto end = std::chrono::high_resolution_clock::now();\n    return std::chrono::duration&lt;double&gt;(end - start).count();\n}\n\n\/\/ \u5404\u30ad\u30e3\u30d7\u30c1\u30e3\u65b9\u6cd5\u306e\u6bd4\u8f03\nvoid compareCaptureMethods() {\n    std::vector&lt;int&gt; largeData(10000, 1);\n\n    \/\/ 1. \u5024\u30ad\u30e3\u30d7\u30c1\u30e3\uff08\u30b3\u30d4\u30fc\uff09\n    auto byValue = [data = largeData]() {\n        return std::accumulate(data.begin(), data.end(), 0);\n    };\n\n    \/\/ 2. \u53c2\u7167\u30ad\u30e3\u30d7\u30c1\u30e3\n    auto byRef = [&amp;largeData]() {\n        return std::accumulate(largeData.begin(), largeData.end(), 0);\n    };\n\n    \/\/ 3. \u30dd\u30a4\u30f3\u30bf\u30ad\u30e3\u30d7\u30c1\u30e3\n    auto byPtr = [ptr = &amp;largeData]() {\n        return std::accumulate(ptr-&gt;begin(), ptr-&gt;end(), 0);\n    };\n\n    constexpr int iterations = 1000;\n    std::cout &lt;&lt; \"\u5024\u30ad\u30e3\u30d7\u30c1\u30e3: \" &lt;&lt; measurePerformance(byValue, iterations) &lt;&lt; \"\u79d2\\n\";\n    std::cout &lt;&lt; \"\u53c2\u7167\u30ad\u30e3\u30d7\u30c1\u30e3: \" &lt;&lt; measurePerformance(byRef, iterations) &lt;&lt; \"\u79d2\\n\";\n    std::cout &lt;&lt; \"\u30dd\u30a4\u30f3\u30bf\u30ad\u30e3\u30d7\u30c1\u30e3: \" &lt;&lt; measurePerformance(byPtr, iterations) &lt;&lt; \"\u79d2\\n\";\n}<\/pre>\n\n\n\n<p>\u6700\u9069\u306a\u30ad\u30e3\u30d7\u30c1\u30e3\u65b9\u6cd5\u306e\u9078\u629e\u57fa\u6e96\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5c0f\u3055\u306a\u30c7\u30fc\u30bf\uff08POD\u578b\u306a\u3069\uff09<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5024\u30ad\u30e3\u30d7\u30c1\u30e3\u3092\u4f7f\u7528\uff08\u30b3\u30d4\u30fc\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u5c0f\u3055\u3044\uff09<\/li>\n\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u5b89\u5168\u6027\u304c\u78ba\u4fdd\u3067\u304d\u308b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5927\u304d\u306a\u30c7\u30fc\u30bf\u69cb\u9020<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>const\u53c2\u7167\u30ad\u30e3\u30d7\u30c1\u30e3\u3092\u4f7f\u7528\uff08\u30b3\u30d4\u30fc\u3092\u907f\u3051\u308b\uff09<\/li>\n\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u9593\u3067\u5171\u6709\u3059\u308b\u5834\u5408\u306f\u540c\u671f\u6a5f\u69cb\u304c\u5fc5\u8981<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u53ef\u5909\u30c7\u30fc\u30bf<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u975econst\u306a\u53c2\u7167\u304b\u30dd\u30a4\u30f3\u30bf\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u7af6\u5408\u306b\u6ce8\u610f\u304c\u5fc5\u8981<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u3068\u30e9\u30e0\u30c0\u5f0f\u306e\u95a2\u4fc2\u6027<\/h3>\n\n\n\n<p>\u30e9\u30e0\u30c0\u5f0f\u306f\u901a\u5e38\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u3088\u3063\u3066\u81ea\u52d5\u7684\u306b\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u306e\u5019\u88dc\u3068\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u3055\u308c\u3084\u3059\u3044\u30e9\u30e0\u30c0\u5f0f\u306e\u4f8b\nauto simpleOperation = [](int x, int y) { return x + y; };\n\n\/\/ \u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u304c\u96e3\u3057\u3044\u4f8b\uff08\u518d\u5e30\u7684\u306a\u30e9\u30e0\u30c0\uff09\nauto factorial = [](int n) -&gt; int {\n    if (n &lt;= 1) return 1;\n    return n * factorial(n - 1);\n};\n\n\/\/ \u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u306e\u6700\u9069\u5316\u4f8b\ntemplate&lt;typename T&gt;\nvoid processData(std::vector&lt;T&gt;&amp; data) {\n    \/\/ \u5c0f\u3055\u306a\u51e6\u7406\u306f\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u3055\u308c\u3084\u3059\u3044\n    std::transform(data.begin(), data.end(), data.begin(),\n        [](const T&amp; x) { return x * 2; });\n}<\/pre>\n\n\n\n<p>\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u3092\u4fc3\u9032\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e9\u30e0\u30c0\u5f0f\u3092\u5c0f\u3055\u304f\u4fdd\u3064<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u96d1\u306a\u51e6\u7406\u306f\u5206\u5272\u3059\u308b<\/li>\n\n\n\n<li>1\u3064\u306e\u8cac\u52d9\u306b\u96c6\u4e2d\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ad\u30e3\u30d7\u30c1\u30e3\u3092\u6700\u5c0f\u9650\u306b\u3059\u308b<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5fc5\u8981\u306a\u5909\u6570\u306e\u307f\u3092\u30ad\u30e3\u30d7\u30c1\u30e3<\/li>\n\n\n\n<li>\u5927\u304d\u306a\u69cb\u9020\u4f53\u306f\u53c2\u7167\u3067\u30ad\u30e3\u30d7\u30c1\u30e3<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u518d\u5e30\u3092\u907f\u3051\u308b<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u518d\u5e30\u7684\u306a\u30e9\u30e0\u30c0\u306f\u5225\u95a2\u6570\u3068\u3057\u3066\u5b9f\u88c5<\/li>\n\n\n\n<li>\u30a4\u30f3\u30e9\u30a4\u30f3\u5316\u306e\u6a5f\u4f1a\u3092\u5897\u3084\u3059<\/li>\n<\/ul>\n\n\n\n<p>\u6027\u80fd\u6700\u9069\u5316\u306e\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>[ ] \u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u5909\u6570\u306f\u5fc5\u8981\u6700\u5c0f\u9650\u304b<\/li>\n\n\n\n<li>[ ] \u30ad\u30e3\u30d7\u30c1\u30e3\u65b9\u6cd5\u306f\u9069\u5207\u304b\uff08\u5024 vs \u53c2\u7167\uff09<\/li>\n\n\n\n<li>[ ] \u30e9\u30e0\u30c0\u5f0f\u306e\u672c\u4f53\u306f\u5341\u5206\u306b\u30b7\u30f3\u30d7\u30eb\u304b<\/li>\n\n\n\n<li>[ ] \u30e1\u30e2\u30ea\u30a2\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u3066\u3044\u308b\u304b<\/li>\n\n\n\n<li>[ ] \u4e0d\u8981\u306a\u30b3\u30d4\u30fc\u3092\u907f\u3051\u3066\u3044\u308b\u304b<\/li>\n\n\n\n<li>[ ] constexpr\u304c\u9069\u7528\u53ef\u80fd\u304b\u691c\u8a0e\u3057\u305f\u304b<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30e9\u30e0\u30c0\u5f0f\u3092\u4f7f\u7528\u3057\u306a\u304c\u3089\u3082\u9ad8\u3044\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u7dad\u6301\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-17\">\u30e9\u30e0\u30c0\u5f0f\u306b\u304a\u3051\u308b\u4e00\u822c\u7684\u306a\u30d0\u30b0\u3068\u5bfe\u51e6\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30c0\u30f3\u30b0\u30ea\u30f3\u30b0\u53c2\u7167\u3092\u9632\u3050\u30ad\u30e3\u30d7\u30c1\u30e3\u306e\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30c0\u30f3\u30b0\u30ea\u30f3\u30b0\u53c2\u7167\u306f\u3001\u30e9\u30e0\u30c0\u5f0f\u3067\u6700\u3082\u6ce8\u610f\u3059\u3079\u304d\u30d0\u30b0\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5371\u967a\u306a\u5b9f\u88c5\u4f8b\nstd::function&lt;int()&gt; createDanglingLambda() {\n    int local = 42;\n    \/\/ \u5371\u967a\uff1a\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u3078\u306e\u53c2\u7167\u3092\u4fdd\u6301\n    return [&amp;local]() { return local; };  \/\/ local\u306f\u95a2\u6570\u7d42\u4e86\u6642\u306b\u7834\u68c4\u3055\u308c\u308b\n}\n\n\/\/ \u5b89\u5168\u306a\u5b9f\u88c5\u4f8b\nstd::function&lt;int()&gt; createSafeLambda() {\n    int local = 42;\n    \/\/ \u5024\u3067\u30ad\u30e3\u30d7\u30c1\u30e3\u3059\u308b\u3053\u3068\u3067\u5b89\u5168\u306b\n    return [local]() { return local; };\n}\n\n\/\/ \u975e\u540c\u671f\u51e6\u7406\u3067\u306e\u6ce8\u610f\u70b9\nvoid asyncExample() {\n    std::string data = \"test\";\n    \/\/ \u5371\u967a\uff1adata\u3078\u306e\u53c2\u7167\u3092\u975e\u540c\u671f\u51e6\u7406\u3067\u4f7f\u7528\n    std::async([&amp;data]() {\n        std::this_thread::sleep_for(std::chrono::seconds(1));\n        std::cout &lt;&lt; data &lt;&lt; '\\n';  \/\/ data\u304c\u65e2\u306b\u7834\u68c4\u3055\u308c\u3066\u3044\u308b\u53ef\u80fd\u6027\n    });\n}\n\n\/\/ \u4fee\u6b63\u4f8b\nvoid safeAsyncExample() {\n    std::string data = \"test\";\n    \/\/ \u30c7\u30fc\u30bf\u3092\u30b3\u30d4\u30fc\u3057\u3066\u5b89\u5168\u306b\n    std::async([data = std::move(data)]() {\n        std::this_thread::sleep_for(std::chrono::seconds(1));\n        std::cout &lt;&lt; data &lt;&lt; '\\n';\n    });\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u3092\u9632\u3050\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<p>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u3068\u30e9\u30e0\u30c0\u5f0f\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u969b\u306e\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class Resource {\npublic:\n    void process() { \/* ... *\/ }\n};\n\n\/\/ \u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306e\u53ef\u80fd\u6027\u304c\u3042\u308b\u5b9f\u88c5\nvoid leakyImplementation() {\n    auto resource = new Resource();\n    auto lambda = [resource]() {\n        resource-&gt;process();\n        \/\/ delete\u3092\u5fd8\u308c\u308b\u53ef\u80fd\u6027\n    };\n}\n\n\/\/ \u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u3092\u4f7f\u7528\u3057\u305f\u5b89\u5168\u306a\u5b9f\u88c5\nvoid safeImplementation() {\n    auto resource = std::make_unique&lt;Resource&gt;();\n    auto lambda = [res = std::move(resource)]() {\n        res-&gt;process();\n        \/\/ \u30ea\u30bd\u30fc\u30b9\u306f\u81ea\u52d5\u7684\u306b\u89e3\u653e\u3055\u308c\u308b\n    };\n}<\/pre>\n\n\n\n<p>\u4e00\u822c\u7684\u306a\u30d0\u30b0\u3092\u9632\u3050\u305f\u3081\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30ad\u30e3\u30d7\u30c1\u30e3\u306b\u95a2\u3059\u308b\u6ce8\u610f\u70b9<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306e\u53c2\u7167\u30ad\u30e3\u30d7\u30c1\u30e3\u3092\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u30b9\u30b3\u30fc\u30d7\u3092\u8d85\u3048\u3066\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u5024\u30ad\u30e3\u30d7\u30c1\u30e3\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u5fc5\u8981\u306b\u5fdc\u3058\u3066move\u3092\u4f7f\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u975e\u540c\u671f\u51e6\u7406\u3067\u306e\u6ce8\u610f\u70b9<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53c2\u7167\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u305f\u30c7\u30fc\u30bf\u306e\u5bff\u547d\u3092\u78ba\u8a8d<\/li>\n\n\n\n<li>\u30b9\u30ec\u30c3\u30c9\u9593\u3067\u306e\u9069\u5207\u306a\u540c\u671f\u3092\u5b9f\u88c5<\/li>\n\n\n\n<li>\u30c7\u30fc\u30bf\u7af6\u5408\u306e\u53ef\u80fd\u6027\u3092\u691c\u8a0e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u7ba1\u7406\u306e\u6ce8\u610f\u70b9<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u751f\u30dd\u30a4\u30f3\u30bf\u306e\u4f7f\u7528\u3092\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u3092\u6d3b\u7528<\/li>\n\n\n\n<li>RAII\u539f\u5247\u306b\u5f93\u3046<\/li>\n<\/ul>\n\n\n\n<p>\u30c7\u30d0\u30c3\u30b0\u306e\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30c7\u30d0\u30c3\u30b0\u60c5\u5831\u3092\u542b\u3080\u30e9\u30e0\u30c0\u5f0f\nauto debuggableLambda = [](int value) {\n    \/\/ \u5b9f\u884c\u6642\u306e\u60c5\u5831\u3092\u51fa\u529b\n    std::cout &lt;&lt; \"Lambda executed with value: \" &lt;&lt; value &lt;&lt; '\\n';\n    \/\/ \u5b9f\u884c\u6642\u306e\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u3092\u53d6\u5f97\u53ef\u80fd\u306a\u5b9f\u88c5\n    return value * 2;\n};\n\n\/\/ \u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u305f\u5909\u6570\u306e\u72b6\u614b\u3092\u78ba\u8a8d\nvoid debugCapturedVariables() {\n    int x = 1, y = 2;\n    auto lambda = [x, y]() {\n        \/\/ \u30c7\u30d0\u30c3\u30b0\u7528\u306e\u51fa\u529b\n        std::cout &lt;&lt; \"Captured x: \" &lt;&lt; x &lt;&lt; \", y: \" &lt;&lt; y &lt;&lt; '\\n';\n        return x + y;\n    };\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u5b88\u308b\u3053\u3068\u3067\u3001\u591a\u304f\u306e\u4e00\u822c\u7684\u306a\u30d0\u30b0\u3092\u672a\u7136\u306b\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-20\">C++20\u4ee5\u964d\u3067\u306e\u9032\u5316\u3057\u305f\u30e9\u30e0\u30c0\u5f0f\u306e\u65b0\u6a5f\u80fd<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e9\u30e0\u30c0\u306e\u6d3b\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>C++20\u3067\u306f\u3001\u30e9\u30e0\u30c0\u5f0f\u3067\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u69cb\u6587\u304c\u5927\u5e45\u306b\u6539\u5584\u3055\u308c\u3001\u3088\u308a\u67d4\u8edf\u306a\u5b9f\u88c5\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ C++20\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e9\u30e0\u30c0\u69cb\u6587\nauto genericLambda = []&lt;typename T&gt;(std::vector&lt;T&gt; const&amp; vec) {\n    \/\/ \u578bT\u306b\u95a2\u3059\u308b\u60c5\u5831\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\n    if constexpr (std::is_arithmetic_v&lt;T&gt;) {\n        return std::accumulate(vec.begin(), vec.end(), T{});\n    } else {\n        return vec.size();\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nstd::vector&lt;int&gt; numbers = {1, 2, 3, 4, 5};\nstd::vector&lt;std::string&gt; strings = {\"hello\", \"world\"};\n\nauto sumNumbers = genericLambda(numbers);      \/\/ \u6570\u5024\u306e\u5408\u8a08\u3092\u8a08\u7b97\nauto countStrings = genericLambda(strings);    \/\/ \u6587\u5b57\u5217\u306e\u6570\u3092\u8fd4\u3059\n\n\/\/ \u578b\u5236\u7d04\u3092\u4f7f\u7528\u3057\u305f\u4f8b\nauto constrainedLambda = []&lt;typename T&gt; \n    requires std::integral&lt;T&gt; (T value) {\n    return value * 2;\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-22\">constexpr\u30e9\u30e0\u30c0\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u4f8b<\/h3>\n\n\n\n<p>C++20\u4ee5\u964d\u3001constexpr\u30e9\u30e0\u30c0\u306e\u6a5f\u80fd\u304c\u5f37\u5316\u3055\u308c\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u8a08\u7b97\u304c\u3088\u308a\u67d4\u8edf\u306b\u306a\u308a\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u8a55\u4fa1\u53ef\u80fd\u306a\u30e9\u30e0\u30c0\u5f0f\nconstexpr auto compile_time_calc = [](int n) constexpr {\n    int result = 1;\n    for (int i = 1; i &lt;= n; ++i) {\n        result *= i;\n    }\n    return result;\n};\n\n\/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u8a08\u7b97\u3055\u308c\u308b\u5024\nconstexpr int factorial_5 = compile_time_calc(5);\n\n\/\/ \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u306e\u4f7f\u7528\ntemplate&lt;auto Func&gt;\nstruct ComputeAtCompileTime {\n    static constexpr auto value = Func();\n};\n\nconstexpr auto pi = []() constexpr { return 3.14159; };\nusing Constants = ComputeAtCompileTime&lt;pi&gt;;\n\n\/\/ unevaluated\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u306e\u4f7f\u7528\uff08C++20\u306e\u65b0\u6a5f\u80fd\uff09\ntemplate&lt;typename T&gt;\nconcept HasToString = requires(T t) {\n    { std::toString(t) } -&gt; std::convertible_to&lt;std::string&gt;;\n};<\/pre>\n\n\n\n<p>C++20\u3067\u8ffd\u52a0\u3055\u308c\u305f\u4e3b\u306a\u6539\u5584\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u69cb\u6587\u306e\u7c21\u7565\u5316<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u660e\u793a\u7684\u306a\u6307\u5b9a\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>\u578b\u5236\u7d04\uff08concepts\uff09\u3068\u306e\u7d71\u5408<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>constexpr\u6a5f\u80fd\u306e\u5f37\u5316<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3088\u308a\u8907\u96d1\u306a\u8a08\u7b97\u304c\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u53ef\u80fd<\/li>\n\n\n\n<li>unevaluated\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u306e\u4f7f\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30e9\u30e0\u30c0\u5f0f\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5bfe\u5fdc<\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ C++20\u4ee5\u964d\u3067\u53ef\u80fd\u306b\u306a\u3063\u305f\u66f8\u304d\u65b9\nstruct Widget {\n    std::function&lt;int()&gt; func = [](){ return 42; };\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u306b\u3088\u308a\u3001\u30e9\u30e0\u30c0\u5f0f\u306f\u3088\u308a\u5f37\u529b\u3067\u67d4\u8edf\u306a\u30c4\u30fc\u30eb\u3068\u306a\u308a\u3001\u7279\u306b\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3084\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u8a08\u7b97\u306e\u5834\u9762\u3067\u771f\u4fa1\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Warning: Undefined array key &#8220;is_admin&#8221; in \/home\/xs392991\/dexall.co.jp\/public_html\/articles\/wp-content\/themes\/ &#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,1],"tags":[],"class_list":{"0":"post-1751","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-cpp","7":"category-uncategorized","8":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1751","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1751"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1751\/revisions"}],"predecessor-version":[{"id":1752,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1751\/revisions\/1752"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1751"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1751"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1751"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}