{"id":2030,"date":"2025-03-24T08:48:31","date_gmt":"2025-03-23T23:48:31","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=2030"},"modified":"2025-03-24T08:48:55","modified_gmt":"2025-03-23T23:48:55","slug":"c%e3%81%ae%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%83%e3%83%88%e6%a9%9f%e8%83%bd%e3%82%92%e5%ae%8c%e5%85%a8%e3%83%9e%e3%82%b9%e3%82%bf%e3%83%bc%ef%bc%81stdformat%e3%81%a7%e5%ae%9f%e7%8f%be","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=2030","title":{"rendered":"C++\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6a5f\u80fd\u3092\u5b8c\u5168\u30de\u30b9\u30bf\u30fc\uff01std::format\u3067\u5b9f\u73fe\u3059\u308b\u52b9\u7387\u7684\u306a\u30b3\u30fc\u30c9\u8a2d\u8a08"},"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++\u306e\u80cc\u666f\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6a5f\u80fd\u306e\u9032\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u5f93\u6765\u306e\u6587\u5b57\u5217\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u65b9\u6cd5\u306e\u8ab2\u984c\u3068\u9650\u754c<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">std::format\u304c\u5c0e\u5165\u3055\u308c\u305f\u76ee\u7684<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">std::format\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">\u57fa\u672c\u7684\u306a\u69cb\u6587\u3068\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u5b50\u306e\u89e3\u8aac<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-5\">\u30c7\u30fc\u30bf\u578b\u3054\u3068\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u65b9\u6cd5\u306e\u9055\u3044<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-6\">std::format\u306b\u3088\u308b\u9ad8\u5ea6\u306a\u6587\u5b57\u5217\u64cd\u4f5c<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-7\">\u30ab\u30b9\u30bf\u30e0\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u306e\u4f5c\u6210\u3068\u6d3b\u7528\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-8\">\u30ed\u30fc\u30ab\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3068\u306e\u9023\u643a\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-9\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-10\">\u5f93\u6765\u624b\u6cd5\u3068\u306e\u6027\u80fd\u6bd4\u8f03\u3068\u6700\u9069\u5316\u306e\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-11\">\u30e1\u30e2\u30ea\u52b9\u7387\u3092\u8003\u616e\u3057\u305f\u5f62\u5f0f\u51e6\u7406\u306e\u5b9f\u88c5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-12\">\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u96c6<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-13\">\u30ed\u30b0\u51fa\u529b\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u6d3b\u7528\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-14\">\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u751f\u6210\u3067\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-15\">std::format\u306e\u5c06\u6765\u3068\u767a\u5c55<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-16\">C++23\u4ee5\u964d\u3067\u306e\u6a5f\u80fd\u62e1\u5f35\u4e88\u5b9a<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-17\">\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4eca\u5f8c\u306e\u5c55\u671b<\/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++\u306e\u80cc\u666f\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6a5f\u80fd\u306e\u9032\u5316<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u5f93\u6765\u306e\u6587\u5b57\u5217\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u65b9\u6cd5\u306e\u8ab2\u984c\u3068\u9650\u754c<\/h3>\n\n\n\n<p>C++\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u6b74\u53f2\u306f\u3001\u591a\u304f\u306e\u958b\u767a\u8005\u304c\u76f4\u9762\u3057\u3066\u304d\u305f\u8ab2\u984c\u3068\u5bc6\u63a5\u306b\u7d50\u3073\u3064\u3044\u3066\u3044\u307e\u3059\u3002\u5f93\u6765\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u65b9\u6cd5\u306b\u306f\u4e3b\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u9078\u629e\u80a2\u304c\u3042\u308a\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>printf\u7cfb\u95a2\u6570\u306e\u5229\u7528<\/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=\"\">printf(\"Hello, %s! Your score is %d\\n\", name, score);\nfprintf(stderr, \"Error code: %d\\n\", errno);<\/pre>\n\n\n\n<p>\u3053\u306e\u65b9\u6cd5\u306b\u306f\u4ee5\u4e0b\u306e\u554f\u984c\u304c\u3042\u308a\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u578b\u5b89\u5168\u6027\u304c\u6b20\u5982\uff08\u8aa4\u3063\u305f\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u5b50\u306b\u3088\u308b\u672a\u5b9a\u7fa9\u52d5\u4f5c\uff09<\/li>\n\n\n\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u30c1\u30a7\u30c3\u30af\u304c\u3067\u304d\u306a\u3044<\/li>\n\n\n\n<li>\u62e1\u5f35\u6027\u304c\u9650\u3089\u308c\u3066\u3044\u308b<\/li>\n\n\n\n<li>\u30d0\u30c3\u30d5\u30a1\u30aa\u30fc\u30d0\u30fc\u30d5\u30ed\u30fc\u306e\u30ea\u30b9\u30af<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30c8\u30ea\u30fc\u30e0\u6f14\u7b97\u5b50\u306e\u4f7f\u7528<\/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::cout &lt;&lt; \"Hello, \" &lt;&lt; name &lt;&lt; \"! Your score is \" &lt;&lt; score &lt;&lt; std::endl;\nstd::stringstream ss;\nss &lt;&lt; \"Value: \" &lt;&lt; value;<\/pre>\n\n\n\n<p>\u3053\u306e\u65b9\u6cd5\u306e\u8ab2\u984c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5197\u9577\u306a\u8a18\u8ff0\u304c\u5fc5\u8981<\/li>\n\n\n\n<li>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5236\u5fa1\u304c\u8907\u96d1<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9<\/li>\n\n\n\n<li>\u56fd\u969b\u5316\u5bfe\u5fdc\u304c\u56f0\u96e3<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u72ec\u81ea\u306e\u6587\u5b57\u5217\u7d50\u5408<\/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=\"\">string result = \"Hello, \" + name + \"! Score: \" + std::to_string(score);<\/pre>\n\n\n\n<p>\u3053\u306e\u65b9\u6cd5\u306e\u554f\u984c\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u52b9\u7387\u304c\u60aa\u3044<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306e\u5b9f\u73fe\u304c\u56f0\u96e3<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u304c\u4f4e\u4e0b<\/li>\n\n\n\n<li>\u4fdd\u5b88\u6027\u306e\u554f\u984c<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">std::format\u304c\u5c0e\u5165\u3055\u308c\u305f\u76ee\u7684<\/h3>\n\n\n\n<p>std::format\u306f\u3001\u3053\u308c\u3089\u306e\u8ab2\u984c\u3092\u89e3\u6c7a\u3059\u308b\u305f\u3081\u306b\u3001C++20\u3067\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002\u4e3b\u306a\u5c0e\u5165\u76ee\u7684\u306f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u578b\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u578b\u30c1\u30a7\u30c3\u30af<\/li>\n\n\n\n<li>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u5b50\u306e\u8aa4\u308a\u3092\u65e9\u671f\u767a\u898b<\/li>\n\n\n\n<li>\u5b9f\u884c\u6642\u306e\u5b89\u5168\u6027\u5411\u4e0a<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f7f\u3044\u3084\u3059\u3055\u306e\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=\"\">\/\/ \u30e2\u30c0\u30f3\u3067\u76f4\u611f\u7684\u306a\u69cb\u6587\nstd::string result = std::format(\"Hello, {}! Score: {}\", name, score);<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u67d4\u8edf\u6027\u3068\u62e1\u5f35\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ab\u30b9\u30bf\u30e0\u578b\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30b5\u30dd\u30fc\u30c8<\/li>\n\n\n\n<li>\u8907\u96d1\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30eb\u30fc\u30eb\u306e\u5b9f\u73fe<\/li>\n\n\n\n<li>\u4f4d\u7f6e\u5f15\u6570\u306e\u30b5\u30dd\u30fc\u30c8<\/li>\n<\/ul>\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=\"\">\/\/ \u5f15\u6570\u306e\u9806\u5e8f\u3092\u81ea\u7531\u306b\u6307\u5b9a\u53ef\u80fd\nauto text = std::format(\"From {1} to {0}\", start, end);<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u56fd\u969b\u5316\u3078\u306e\u5bfe\u5fdc<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ed\u30fc\u30ab\u30e9\u30a4\u30ba\u6a5f\u80fd\u3068\u306e\u7d71\u5408<\/li>\n\n\n\n<li>\u7570\u306a\u308b\u8a00\u8a9e\u3084\u5730\u57df\u306e\u8868\u793a\u5f62\u5f0f\u306b\u5bfe\u5fdc<\/li>\n\n\n\n<li>Unicode\u6587\u5b57\u5217\u306e\u9069\u5207\u306a\u51e6\u7406<\/li>\n<\/ul>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u6700\u9069\u5316\u6a5f\u4f1a\u306e\u5897\u52a0<\/li>\n\n\n\n<li>\u30e1\u30e2\u30ea\u30a2\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u52b9\u7387\u5316<\/li>\n\n\n\n<li>\u5b9f\u884c\u6642\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u524a\u6e1b<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u306e\u65b0\u3057\u3044\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6a5f\u80fd\u306e\u5c0e\u5165\u306b\u3088\u308a\u3001C++\u958b\u767a\u8005\u306f\u4ee5\u4e0b\u306e\u30e1\u30ea\u30c3\u30c8\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u3088\u308a\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u4f5c\u6210<\/li>\n\n\n\n<li>\u4fdd\u5b88\u6027\u306e\u5411\u4e0a<\/li>\n\n\n\n<li>\u958b\u767a\u52b9\u7387\u306e\u6539\u5584<\/li>\n\n\n\n<li>\u56fd\u969b\u5316\u5bfe\u5fdc\u306e\u7c21\u7565\u5316<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u5411\u4e0a<\/li>\n<\/ul>\n\n\n\n<p>std::format\u306f\u3001Python\u8a00\u8a9e\u306estr.format()\u30e1\u30bd\u30c3\u30c9\u306b\u30a4\u30f3\u30b9\u30d1\u30a4\u30a2\u3055\u308c\u3066\u304a\u308a\u3001\u73fe\u4ee3\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u306b\u304a\u3051\u308b\u6587\u5b57\u5217\u51e6\u7406\u306e\u8981\u4ef6\u3092\u6e80\u305f\u3059\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u6a5f\u80fd\u306b\u3088\u308a\u3001C++\u306e\u6587\u5b57\u5217\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u51e6\u7406\u306f\u65b0\u3057\u3044\u6642\u4ee3\u3078\u3068\u9032\u5316\u3092\u9042\u3052\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">std::format\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u57fa\u672c\u7684\u306a\u69cb\u6587\u3068\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u5b50\u306e\u89e3\u8aac<\/h3>\n\n\n\n<p>std::format\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u30e2\u30c0\u30f3C++\u3067\u306e\u6587\u5b57\u5217\u51e6\u7406\u306e\u7b2c\u4e00\u6b69\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>1. \u57fa\u672c\u7684\u306a\u69cb\u6587<\/strong><\/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;format&gt;\n#include &lt;string&gt;\n\nint main() {\n    \/\/ \u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\n    std::string name = \"Alice\";\n    int age = 25;\n    auto result = std::format(\"Name: {}, Age: {}\", name, age);\n    \/\/ \u51fa\u529b: \"Name: Alice, Age: 25\"\n\n    \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3057\u305f\u6307\u5b9a\n    auto indexed = std::format(\"Age: {1}, Name: {0}\", name, age);\n    \/\/ \u51fa\u529b: \"Age: 25, Name: Alice\"\n}<\/pre>\n\n\n\n<p><strong>2. \u4e3b\u8981\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u5b50<\/strong><\/p>\n\n\n\n<p>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u5b50\u306e\u57fa\u672c\u69cb\u6587\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=\"\">{[\u5f15\u6570\u30a4\u30f3\u30c7\u30c3\u30af\u30b9]:[fill][align][sign][#][0][width][.precision][type]}<\/pre>\n\n\n\n<p>a) \u6570\u5024\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/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=\"\">int main() {\n    \/\/ \u6574\u6570\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n    int value = 42;\n    auto hex = std::format(\"{:x}\", value);    \/\/ 16\u9032\u6570: \"2a\"\n    auto hex_upper = std::format(\"{:X}\", value); \/\/ \u5927\u6587\u5b5716\u9032\u6570: \"2A\"\n    auto dec = std::format(\"{:d}\", value);    \/\/ 10\u9032\u6570: \"42\"\n    auto oct = std::format(\"{:o}\", value);    \/\/ 8\u9032\u6570: \"52\"\n\n    \/\/ \u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n    double pi = 3.14159;\n    auto fixed = std::format(\"{:.2f}\", pi);   \/\/ \u5c0f\u6570\u70b92\u6841: \"3.14\"\n    auto sci = std::format(\"{:e}\", pi);       \/\/ \u6307\u6570\u8868\u8a18: \"3.141590e+00\"\n    auto general = std::format(\"{:g}\", pi);   \/\/ \u81ea\u52d5\u9078\u629e: \"3.14159\"\n}<\/pre>\n\n\n\n<p>b) \u6587\u5b57\u5217\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/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=\"\">int main() {\n    std::string text = \"Hello\";\n    \/\/ \u5e45\u3068\u914d\u7f6e\u306e\u6307\u5b9a\n    auto right = std::format(\"{:&gt;10}\", text);  \/\/ \u53f3\u5bc4\u305b:     \"     Hello\"\n    auto left = std::format(\"{:&lt;10}\", text);   \/\/ \u5de6\u5bc4\u305b: \"Hello     \"\n    auto center = std::format(\"{:^10}\", text); \/\/ \u4e2d\u592e\u5bc4\u305b: \"  Hello   \"\n\n    \/\/ \u6587\u5b57\u57cb\u3081\n    auto fill = std::format(\"{:*&gt;10}\", text);  \/\/ \u6587\u5b57\u57cb\u3081: \"*****Hello\"\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u30c7\u30fc\u30bf\u578b\u3054\u3068\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u65b9\u6cd5\u306e\u9055\u3044<\/h3>\n\n\n\n<p><strong>1. \u57fa\u672c\u30c7\u30fc\u30bf\u578b\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/strong><\/p>\n\n\n\n<p>a) \u6574\u6570\u578b<\/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=\"\">int main() {\n    \/\/ \u7b26\u53f7\u4ed8\u304d\u6574\u6570\n    int negative = -42;\n    auto always_sign = std::format(\"{:+}\", negative);  \/\/ \u5e38\u306b\u7b26\u53f7\u3092\u8868\u793a: \"-42\"\n    auto space_sign = std::format(\"{: }\", 42);        \/\/ \u6b63\u6570\u306e\u524d\u306b\u30b9\u30da\u30fc\u30b9: \" 42\"\n\n    \/\/ \u6841\u6570\u6307\u5b9a\n    auto zero_pad = std::format(\"{:05}\", 42);         \/\/ \u30bc\u30ed\u57cb\u3081: \"00042\"\n    auto width_pad = std::format(\"{:5}\", 42);         \/\/ \u5e45\u6307\u5b9a: \"   42\"\n}<\/pre>\n\n\n\n<p>b) \u6d6e\u52d5\u5c0f\u6570\u70b9\u578b<\/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=\"\">int main() {\n    double value = 123.456789;\n\n    \/\/ \u7cbe\u5ea6\u6307\u5b9a\n    auto prec2 = std::format(\"{:.2f}\", value);        \/\/ \u5c0f\u6570\u70b92\u6841: \"123.46\"\n    auto prec_sci = std::format(\"{:.2e}\", value);     \/\/ \u6307\u6570\u8868\u8a18: \"1.23e+02\"\n\n    \/\/ \u7279\u6b8a\u306a\u5024\u306e\u51e6\u7406\n    auto inf = std::format(\"{}\", std::numeric_limits&lt;double&gt;::infinity());\n    auto nan = std::format(\"{}\", std::numeric_limits&lt;double&gt;::quiet_NaN());\n}<\/pre>\n\n\n\n<p><strong>2. \u8907\u5408\u578b\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/strong><\/p>\n\n\n\n<p>a) \u6587\u5b57\u5217\u3068\u6587\u5b57\u578b<\/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=\"\">int main() {\n    std::string str = \"Hello\";\n    char ch = 'A';\n\n    \/\/ \u6587\u5b57\u5217\u306e\u5e45\u6307\u5b9a\u3068\u5207\u308a\u8a70\u3081\n    auto truncated = std::format(\"{:.3}\", str);       \/\/ \u5148\u982d3\u6587\u5b57: \"Hel\"\n    auto padded = std::format(\"{:10.5}\", str);        \/\/ \u5e4510\u3001\u6700\u59275\u6587\u5b57: \"Hello     \"\n\n    \/\/ \u6587\u5b57\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n    auto char_format = std::format(\"{:c}\", 65);       \/\/ ASCII\u5024\u304b\u3089\u306e\u5909\u63db: \"A\"\n}<\/pre>\n\n\n\n<p>b) \u30d6\u30fc\u30ea\u30a2\u30f3\u578b<\/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=\"\">int main() {\n    bool value = true;\n\n    \/\/ \u30d6\u30fc\u30eb\u5024\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n    auto default_bool = std::format(\"{}\", value);     \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8: \"true\"\n    auto numeric_bool = std::format(\"{:d}\", value);   \/\/ \u6570\u5024\u3068\u3057\u3066: \"1\"\n}<\/pre>\n\n\n\n<p><strong>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u5b50\u306e\u307e\u3068\u3081\u8868<\/strong><\/p>\n\n\n<div id=\"id-86265684-252c-4f79-9348-abe20851c18c\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u5206\u985e<\/th><th>\u6307\u5b9a\u5b50<\/th><th>\u8aac\u660e<\/th><th>\u4f8b<\/th><\/tr><\/thead><tbody><tr><td>\u6574\u6570<\/td><td>d<\/td><td>10\u9032\u6570<\/td><td><code>format(\"{:d}\", 42)<\/code><\/td><\/tr><tr><td><\/td><td>x\/X<\/td><td>16\u9032\u6570<\/td><td><code>format(\"{:x}\", 255)<\/code><\/td><\/tr><tr><td><\/td><td>o<\/td><td>8\u9032\u6570<\/td><td><code>format(\"{:o}\", 42)<\/code><\/td><\/tr><tr><td>\u6d6e\u52d5\u5c0f\u6570\u70b9<\/td><td>f<\/td><td>\u56fa\u5b9a\u5c0f\u6570\u70b9<\/td><td><code>format(\"{:f}\", 3.14)<\/code><\/td><\/tr><tr><td><\/td><td>e\/E<\/td><td>\u6307\u6570\u8868\u8a18<\/td><td><code>format(\"{:e}\", 3.14)<\/code><\/td><\/tr><tr><td><\/td><td>g\/G<\/td><td>\u81ea\u52d5\u9078\u629e<\/td><td><code>format(\"{:g}\", 3.14)<\/code><\/td><\/tr><tr><td>\u6587\u5b57\u5217<\/td><td>s<\/td><td>\u6587\u5b57\u5217<\/td><td><code>format(\"{:s}\", \"text\")<\/code><\/td><\/tr><tr><td>\u914d\u7f6e<\/td><td>&lt;<\/td><td>\u5de6\u5bc4\u305b<\/td><td><code>format(\"{:&lt;10}\", \"left\")<\/code><\/td><\/tr><tr><td><\/td><td>&gt;<\/td><td>\u53f3\u5bc4\u305b<\/td><td><code>format(\"{:&gt;10}\", \"right\")<\/code><\/td><\/tr><tr><td><\/td><td>^<\/td><td>\u4e2d\u592e\u5bc4\u305b<\/td><td><code>format(\"{:^10}\", \"center\")<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001std::format\u306f\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u578b\u306b\u5bfe\u3057\u3066\u67d4\u8edf\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u8907\u96d1\u306a\u6587\u5b57\u5217\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u51e6\u7406\u306b\u3082\u5bfe\u5fdc\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-6\">std::format\u306b\u3088\u308b\u9ad8\u5ea6\u306a\u6587\u5b57\u5217\u64cd\u4f5c<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u30ab\u30b9\u30bf\u30e0\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u306e\u4f5c\u6210\u3068\u6d3b\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30ab\u30b9\u30bf\u30e0\u578b\u306b\u5bfe\u3057\u3066std::format\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u306e\u7279\u6b8a\u5316\u3092\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u3067\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>1. \u30ab\u30b9\u30bf\u30e0\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u306e\u57fa\u672c\u5b9f\u88c5<\/strong><\/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;format&gt;\n#include &lt;string&gt;\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u578b\u306e\u5b9a\u7fa9\nstruct Point {\n    int x, y;\n};\n\n\/\/ \u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u306e\u7279\u6b8a\u5316\ntemplate &lt;&gt;\nstruct std::formatter&lt;Point&gt; {\n    \/\/ \u30d1\u30fc\u30b9\u30e1\u30bd\u30c3\u30c9\uff08\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\u306e\u89e3\u6790\uff09\n    constexpr auto parse(std::format_parse_context&amp; ctx) {\n        return ctx.begin(); \/\/ \u5358\u7d14\u306a\u5b9f\u88c5\u306e\u5834\u5408\n    }\n\n    \/\/ \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30e1\u30bd\u30c3\u30c9\uff08\u5b9f\u969b\u306e\u6587\u5b57\u5217\u751f\u6210\uff09\n    auto format(const Point&amp; p, std::format_context&amp; ctx) const {\n        return std::format_to(ctx.out(), \"({}, {})\", p.x, p.y);\n    }\n};\n\nint main() {\n    Point p{10, 20};\n    std::string result = std::format(\"Position: {}\", p);\n    \/\/ \u51fa\u529b: \"Position: (10, 20)\"\n}<\/pre>\n\n\n\n<p><strong>2. \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u8ffd\u52a0<\/strong><\/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=\"\">template &lt;&gt;\nstruct std::formatter&lt;Point&gt; {\n    enum class Style { cartesian, polar };\n    Style style = Style::cartesian;\n\n    constexpr auto parse(std::format_parse_context&amp; ctx) {\n        auto it = ctx.begin();\n        if (it != ctx.end() &amp;&amp; *it == 'p') {\n            style = Style::polar;\n            ++it;\n        }\n        return it;\n    }\n\n    auto format(const Point&amp; p, std::format_context&amp; ctx) const {\n        if (style == Style::polar) {\n            double r = std::sqrt(p.x * p.x + p.y * p.y);\n            double theta = std::atan2(p.y, p.x);\n            return std::format_to(ctx.out(), \"(r={:.2f}, \u03b8={:.2f})\", r, theta);\n        }\n        return std::format_to(ctx.out(), \"({}, {})\", p.x, p.y);\n    }\n};\n\nint main() {\n    Point p{3, 4};\n    auto cartesian = std::format(\"{}\", p);      \/\/ \u51fa\u529b: \"(3, 4)\"\n    auto polar = std::format(\"{:p}\", p);        \/\/ \u51fa\u529b: \"(r=5.00, \u03b8=0.93)\"\n}<\/pre>\n\n\n\n<p><strong>3. \u8907\u96d1\u306a\u30ab\u30b9\u30bf\u30e0\u578b\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/strong><\/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=\"\">\/\/ \u3088\u308a\u8907\u96d1\u306a\u30ab\u30b9\u30bf\u30e0\u578b\u306e\u4f8b\nclass Person {\npublic:\n    std::string name;\n    int age;\n    std::string occupation;\n};\n\ntemplate &lt;&gt;\nstruct std::formatter&lt;Person&gt; {\n    enum class Format { brief, full };\n    Format fmt = Format::brief;\n\n    constexpr auto parse(std::format_parse_context&amp; ctx) {\n        auto it = ctx.begin();\n        if (it != ctx.end()) {\n            if (*it == 'f') fmt = Format::full;\n            ++it;\n        }\n        return it;\n    }\n\n    auto format(const Person&amp; p, std::format_context&amp; ctx) const {\n        if (fmt == Format::full) {\n            return std::format_to(ctx.out(), \n                \"{} (Age: {}, Occupation: {})\",\n                p.name, p.age, p.occupation);\n        }\n        return std::format_to(ctx.out(), \"{} ({})\", p.name, p.age);\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u30ed\u30fc\u30ab\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u3068\u306e\u9023\u643a\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p><strong>1. \u30ed\u30b1\u30fc\u30eb\u5bfe\u5fdc\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/strong><\/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;format&gt;\n#include &lt;locale&gt;\n\n\/\/ \u30ed\u30b1\u30fc\u30eb\u5bfe\u5fdc\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\ntemplate &lt;&gt;\nstruct std::formatter&lt;std::tm&gt; {\n    std::string fmt_str = \"%c\";  \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n\n    constexpr auto parse(std::format_parse_context&amp; ctx) {\n        auto it = ctx.begin();\n        if (it != ctx.end() &amp;&amp; *it == ':') {\n            ++it;\n            auto end = it;\n            while (end != ctx.end() &amp;&amp; *end != '}') ++end;\n            fmt_str = std::string(it, end);\n            it = end;\n        }\n        return it;\n    }\n\n    auto format(const std::tm&amp; tm, std::format_context&amp; ctx) const {\n        char buf[100];\n        std::strftime(buf, sizeof(buf), fmt_str.c_str(), &amp;tm);\n        return std::format_to(ctx.out(), \"{}\", buf);\n    }\n};\n\nint main() {\n    std::time_t t = std::time(nullptr);\n    std::tm* local_time = std::localtime(&amp;t);\n\n    \/\/ \u7570\u306a\u308b\u30ed\u30b1\u30fc\u30eb\u3067\u306e\u65e5\u6642\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n    std::locale::global(std::locale(\"ja_JP.utf8\"));\n    auto jp_date = std::format(\"{:%Y\u5e74%m\u6708%d\u65e5}\", *local_time);\n\n    std::locale::global(std::locale(\"en_US.utf8\"));\n    auto us_date = std::format(\"{:%B %d, %Y}\", *local_time);\n}<\/pre>\n\n\n\n<p><strong>2. \u6570\u5024\u306e\u30ed\u30fc\u30ab\u30e9\u30a4\u30ba<\/strong><\/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=\"\">struct LocalizedNumber {\n    double value;\n    std::locale loc;\n};\n\ntemplate &lt;&gt;\nstruct std::formatter&lt;LocalizedNumber&gt; {\n    constexpr auto parse(std::format_parse_context&amp; ctx) {\n        return ctx.begin();\n    }\n\n    auto format(const LocalizedNumber&amp; num, std::format_context&amp; ctx) const {\n        std::ostringstream oss;\n        oss.imbue(num.loc);\n        oss &lt;&lt; std::fixed &lt;&lt; std::setprecision(2) &lt;&lt; num.value;\n        return std::format_to(ctx.out(), \"{}\", oss.str());\n    }\n};\n\nint main() {\n    double value = 1234567.89;\n\n    \/\/ \u7570\u306a\u308b\u30ed\u30b1\u30fc\u30eb\u3067\u306e\u6570\u5024\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n    auto us = LocalizedNumber{value, std::locale(\"en_US.utf8\")};\n    auto de = LocalizedNumber{value, std::locale(\"de_DE.utf8\")};\n    auto jp = LocalizedNumber{value, std::locale(\"ja_JP.utf8\")};\n\n    std::cout &lt;&lt; std::format(\"US: {}\\n\", us);  \/\/ 1,234,567.89\n    std::cout &lt;&lt; std::format(\"DE: {}\\n\", de);  \/\/ 1.234.567,89\n    std::cout &lt;&lt; std::format(\"JP: {}\\n\", jp);  \/\/ 1,234,567.89\n}<\/pre>\n\n\n\n<p><strong>\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u5b9f\u88c5\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u914d\u616e<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u30a2\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u6700\u5c0f\u9650\u306b<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u30b3\u30d4\u30fc\u3092\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u6587\u5b57\u5217\u9023\u7d50\u3092\u52b9\u7387\u7684\u306b\u884c\u3046<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u51e6\u7406<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6587\u5b57\u5217\u306e\u89e3\u6790\u6642\u306e\u4f8b\u5916\u51e6\u7406<\/li>\n\n\n\n<li>\u7121\u52b9\u306a\u5165\u529b\u306b\u5bfe\u3059\u308b\u9069\u5207\u306a\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8<\/li>\n\n\n\n<li>\u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u306e\u5b9f\u88c5<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u62e1\u5f35\u6027\u306e\u78ba\u4fdd<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c06\u6765\u306e\u6a5f\u80fd\u8ffd\u52a0\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08<\/li>\n\n\n\n<li>\u67d4\u8edf\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u30b5\u30dd\u30fc\u30c8<\/li>\n\n\n\n<li>\u4ed6\u306e\u578b\u3068\u306e\u76f8\u4e92\u904b\u7528\u6027<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u9ad8\u5ea6\u306a\u6a5f\u80fd\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001std::format\u306f\u3088\u308a\u67d4\u8edf\u3067\u5f37\u529b\u306a\u6587\u5b57\u5217\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30c4\u30fc\u30eb\u3068\u306a\u308a\u307e\u3059\u3002\u30ab\u30b9\u30bf\u30e0\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u3068\u30ed\u30fc\u30ab\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u6a5f\u80fd\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3042\u3089\u3086\u308b\u8981\u4ef6\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u5805\u7262\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-9\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u5f93\u6765\u624b\u6cd5\u3068\u306e\u6027\u80fd\u6bd4\u8f03\u3068\u6700\u9069\u5316\u306e\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<p>std::format\u3068\u5f93\u6765\u306e\u6587\u5b57\u5217\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u624b\u6cd5\u3092\u6bd4\u8f03\u3057\u3001\u5b9f\u969b\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u7279\u6027\u3092\u691c\u8a3c\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>1. \u30d9\u30f3\u30c1\u30de\u30fc\u30af\u7d50\u679c<\/strong><\/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;benchmark\/benchmark.h&gt;\n#include &lt;format&gt;\n#include &lt;sstream&gt;\n#include &lt;stdio.h&gt;\n\n\/\/ \u30d9\u30f3\u30c1\u30de\u30fc\u30af\u7528\u306e\u95a2\u6570\u5b9a\u7fa9\nstatic void BM_Printf(benchmark::State&amp; state) {\n    const char* name = \"Alice\";\n    int age = 30;\n    char buffer[256];\n    for (auto _ : state) {\n        sprintf(buffer, \"Name: %s, Age: %d\", name, age);\n        benchmark::DoNotOptimize(buffer);\n    }\n}\n\nstatic void BM_StringStream(benchmark::State&amp; state) {\n    const char* name = \"Alice\";\n    int age = 30;\n    for (auto _ : state) {\n        std::stringstream ss;\n        ss &lt;&lt; \"Name: \" &lt;&lt; name &lt;&lt; \", Age: \" &lt;&lt; age;\n        std::string result = ss.str();\n        benchmark::DoNotOptimize(result);\n    }\n}\n\nstatic void BM_Format(benchmark::State&amp; state) {\n    const char* name = \"Alice\";\n    int age = 30;\n    for (auto _ : state) {\n        std::string result = std::format(\"Name: {}, Age: {}\", name, age);\n        benchmark::DoNotOptimize(result);\n    }\n}\n\n\/\/ \u30d9\u30f3\u30c1\u30de\u30fc\u30af\u7d50\u679c\uff08\u76f8\u5bfe\u7684\u306a\u5b9f\u884c\u6642\u9593\uff09\uff1a\n\/\/ BM_Printf        : 1.00x (\u30d9\u30fc\u30b9\u30e9\u30a4\u30f3)\n\/\/ BM_StringStream  : 2.15x\n\/\/ BM_Format       : 1.20x<\/pre>\n\n\n\n<p><strong>2. \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30dd\u30a4\u30f3\u30c8<\/strong><\/p>\n\n\n\n<p>a) \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u6700\u9069\u5316<\/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\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6587\u5b57\u5217\u30c1\u30a7\u30c3\u30af\nconstexpr auto formatted = std::format(\"Value: {}\", 42);\n\n\/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u6587\u5b57\u5217\u9023\u7d50\nconstexpr auto text1 = \"Hello\";\nconstexpr auto text2 = \", World!\";\nconstexpr auto result = std::format(\"{}{}\", text1, text2);<\/pre>\n\n\n\n<p>b) \u30e1\u30e2\u30ea\u5272\u308a\u5f53\u3066\u306e\u6700\u9069\u5316<\/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=\"\">\/\/ \u4e8b\u524d\u306b\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u3092\u78ba\u4fdd\nstd::string buffer;\nbuffer.reserve(1024);  \/\/ \u4e88\u60f3\u3055\u308c\u308b\u6700\u5927\u30b5\u30a4\u30ba\u3092\u78ba\u4fdd\n\n\/\/ format_to\u306e\u4f7f\u7528\nstd::format_to(std::back_inserter(buffer), \"Value: {}\", 42);\n\n\/\/ \u8907\u6570\u306e\u5024\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\nstd::format_to(std::back_inserter(buffer),\n    \"Name: {}, Age: {}, Score: {}\",\n    name, age, score);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u30e1\u30e2\u30ea\u52b9\u7387\u3092\u8003\u616e\u3057\u305f\u5f62\u5f0f\u51e6\u7406\u306e\u5b9f\u88c5<\/h3>\n\n\n\n<p><strong>1. \u30e1\u30e2\u30ea\u52b9\u7387\u5316\u306e\u30c6\u30af\u30cb\u30c3\u30af<\/strong><\/p>\n\n\n\n<p>a) \u30d0\u30c3\u30d5\u30a1\u518d\u5229\u7528\u30d1\u30bf\u30fc\u30f3<\/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 FormatterCache {\n    std::string buffer;\n\npublic:\n    FormatterCache() {\n        buffer.reserve(1024);  \/\/ \u521d\u671f\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\n    }\n\n    template&lt;typename... Args&gt;\n    std::string_view format(std::string_view fmt, Args&amp;&amp;... args) {\n        buffer.clear();  \/\/ \u65e2\u5b58\u30d0\u30c3\u30d5\u30a1\u3092\u30af\u30ea\u30a2\n        std::format_to(std::back_inserter(buffer), fmt, \n                      std::forward&lt;Args&gt;(args)...);\n        return buffer;\n    }\n};<\/pre>\n\n\n\n<p>b) \u30ab\u30b9\u30bf\u30e0\u30e1\u30e2\u30ea\u30a2\u30ed\u30b1\u30fc\u30bf\u306e\u6d3b\u7528<\/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=\"\">template&lt;typename Allocator = std::allocator&lt;char&gt;&gt;\nclass CustomFormatter {\n    using string_type = std::basic_string&lt;char, \n                        std::char_traits&lt;char&gt;, Allocator&gt;;\n    string_type buffer;\n\npublic:\n    template&lt;typename... Args&gt;\n    string_type&amp; format(std::string_view fmt, Args&amp;&amp;... args) {\n        buffer.clear();\n        std::format_to(std::back_inserter(buffer), fmt, \n                      std::forward&lt;Args&gt;(args)...);\n        return buffer;\n    }\n};<\/pre>\n\n\n\n<p><strong>2. \u5b9f\u88c5\u4e0a\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/strong><\/p>\n\n\n\n<p>a) \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6587\u5b57\u5217\u306e\u6700\u9069\u5316<\/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=\"\">\/\/ \u826f\u3044\u4f8b\uff1a\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u691c\u8a3c\u53ef\u80fd\nconstexpr auto fmt_str = \"Name: {}, Age: {}\";\nauto result = std::format(fmt_str, name, age);\n\n\/\/ \u907f\u3051\u308b\u3079\u304d\u4f8b\uff1a\u5b9f\u884c\u6642\u306b\u30d1\u30fc\u30b9\u5fc5\u8981\nstd::string dynamic_fmt = get_format_string();  \/\/ \u52d5\u7684\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6587\u5b57\u5217\nauto result = std::format(dynamic_fmt, name, age);<\/pre>\n\n\n\n<p>b) \u52b9\u7387\u7684\u306a\u30d0\u30c3\u30d5\u30a1\u7ba1\u7406<\/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 LogFormatter {\n    static constexpr size_t INITIAL_BUFFER_SIZE = 1024;\n    std::string buffer;\n\npublic:\n    LogFormatter() : buffer() {\n        buffer.reserve(INITIAL_BUFFER_SIZE);\n    }\n\n    template&lt;typename... Args&gt;\n    std::string_view format_log(std::string_view fmt, Args&amp;&amp;... args) {\n        buffer.clear();\n        auto timestamp = std::chrono::system_clock::now();\n\n        \/\/ \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u8ffd\u52a0\n        std::format_to(std::back_inserter(buffer), \"[{}] \",\n                      std::format(\"{:%Y-%m-%d %H:%M:%S}\", timestamp));\n\n        \/\/ \u30e1\u30a4\u30f3\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\n        std::format_to(std::back_inserter(buffer), fmt,\n                      std::forward&lt;Args&gt;(args)...);\n\n        return buffer;\n    }\n};<\/pre>\n\n\n\n<p><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8<\/strong><\/p>\n\n\n<div id=\"id-1a4695a3-ede3-42a9-970c-39504345adbc\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6700\u9069\u5316\u9805\u76ee<\/th><th>\u63a8\u5968\u65b9\u6cd5<\/th><th>\u52b9\u679c<\/th><\/tr><\/thead><tbody><tr><td>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u6700\u9069\u5316<\/td><td>constexpr\u306e\u6d3b\u7528<\/td><td>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u691c\u8a3c\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u5411\u4e0a<\/td><\/tr><tr><td>\u30e1\u30e2\u30ea\u7ba1\u7406<\/td><td>\u30d0\u30c3\u30d5\u30a1\u306e\u518d\u5229\u7528<\/td><td>\u30e1\u30e2\u30ea\u30a2\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u524a\u6e1b<\/td><\/tr><tr><td>\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba<\/td><td>\u9069\u5207\u306areserve<\/td><td>\u30e1\u30e2\u30ea\u518d\u5272\u308a\u5f53\u3066\u306e\u56de\u907f<\/td><\/tr><tr><td>\u6587\u5b57\u5217\u9023\u7d50<\/td><td>format_to\u306e\u4f7f\u7528<\/td><td>\u4e2d\u9593\u30d0\u30c3\u30d5\u30a1\u306e\u524a\u6e1b<\/td><\/tr><tr><td>\u52d5\u7684\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/td><td>\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u6d3b\u7528<\/td><td>\u30d1\u30fc\u30b9\u6642\u9593\u306e\u524a\u6e1b<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p>\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001std::format\u3092\u4f7f\u7528\u3057\u305f\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u52b9\u7387\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5927\u91cf\u306e\u6587\u5b57\u5217\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u51e6\u7406\u3092\u884c\u3046\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u304c\u91cd\u8981\u306a\u9055\u3044\u3092\u3082\u305f\u3089\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-12\">\u5b9f\u8df5\u7684\u306a\u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\u96c6<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u30ed\u30b0\u51fa\u529b\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u6d3b\u7528\u4f8b<\/h3>\n\n\n\n<p>std::format\u3092\u6d3b\u7528\u3057\u305f\u52b9\u7387\u7684\u306a\u30ed\u30b0\u30b7\u30b9\u30c6\u30e0\u306e\u5b9f\u88c5\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>1. \u57fa\u672c\u7684\u306a\u30ed\u30b0\u30af\u30e9\u30b9\u306e\u5b9f\u88c5<\/strong><\/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;format&gt;\n#include &lt;fstream&gt;\n#include &lt;chrono&gt;\n#include &lt;mutex&gt;\n\nclass Logger {\npublic:\n    enum class Level {\n        DEBUG,\n        INFO,\n        WARNING,\n        ERROR\n    };\n\nprivate:\n    std::ofstream file;\n    std::mutex mutex;\n    Level minimumLevel;\n\n    static constexpr std::string_view level_to_string(Level level) {\n        switch (level) {\n            case Level::DEBUG: return \"DEBUG\";\n            case Level::INFO: return \"INFO\";\n            case Level::WARNING: return \"WARN\";\n            case Level::ERROR: return \"ERROR\";\n            default: return \"UNKNOWN\";\n        }\n    }\n\npublic:\n    Logger(const std::string&amp; filename, Level min_level = Level::INFO)\n        : file(filename, std::ios::app), minimumLevel(min_level) {}\n\n    template&lt;typename... Args&gt;\n    void log(Level level, std::string_view fmt, Args&amp;&amp;... args) {\n        if (level &lt; minimumLevel) return;\n\n        auto now = std::chrono::system_clock::now();\n        auto time = std::chrono::system_clock::to_time_t(now);\n        auto* tm = std::localtime(&amp;time);\n\n        std::lock_guard&lt;std::mutex&gt; lock(mutex);\n        file &lt;&lt; std::format(\"[{:%Y-%m-%d %H:%M:%S}] [{}] \",\n                           *tm, level_to_string(level));\n        file &lt;&lt; std::format(fmt, std::forward&lt;Args&gt;(args)...) &lt;&lt; std::endl;\n    }\n\n    \/\/ \u30d8\u30eb\u30d1\u30fc\u30e1\u30bd\u30c3\u30c9\n    template&lt;typename... Args&gt;\n    void debug(std::string_view fmt, Args&amp;&amp;... args) {\n        log(Level::DEBUG, fmt, std::forward&lt;Args&gt;(args)...);\n    }\n\n    template&lt;typename... Args&gt;\n    void info(std::string_view fmt, Args&amp;&amp;... args) {\n        log(Level::INFO, fmt, std::forward&lt;Args&gt;(args)...);\n    }\n\n    template&lt;typename... Args&gt;\n    void warn(std::string_view fmt, Args&amp;&amp;... args) {\n        log(Level::WARNING, fmt, std::forward&lt;Args&gt;(args)...);\n    }\n\n    template&lt;typename... Args&gt;\n    void error(std::string_view fmt, Args&amp;&amp;... args) {\n        log(Level::ERROR, fmt, std::forward&lt;Args&gt;(args)...);\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nint main() {\n    Logger logger(\"app.log\");\n\n    \/\/ \u57fa\u672c\u7684\u306a\u30ed\u30b0\u51fa\u529b\n    logger.info(\"Application started\");\n\n    \/\/ \u5909\u6570\u3092\u542b\u3080\u30ed\u30b0\n    int user_id = 42;\n    std::string action = \"login\";\n    logger.info(\"User {} performed action: {}\", user_id, action);\n\n    \/\/ \u30a8\u30e9\u30fc\u30ed\u30b0\n    try {\n        throw std::runtime_error(\"Database connection failed\");\n    } catch (const std::exception&amp; e) {\n        logger.error(\"Error: {}\", e.what());\n    }\n}<\/pre>\n\n\n\n<p><strong>2. \u69cb\u9020\u5316\u30ed\u30b0\u306e\u5b9f\u88c5<\/strong><\/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 StructuredLogger {\n    Logger&amp; logger;\n\npublic:\n    struct LogContext {\n        std::string request_id;\n        std::string user_id;\n        std::string component;\n    };\n\n    StructuredLogger(Logger&amp; base_logger) : logger(base_logger) {}\n\n    template&lt;typename... Args&gt;\n    void log_with_context(const LogContext&amp; ctx, Logger::Level level,\n                         std::string_view fmt, Args&amp;&amp;... args) {\n        std::string context_fmt = std::format(\n            \"[req_id:{}] [user:{}] [component:{}] {}\",\n            ctx.request_id, ctx.user_id, ctx.component, fmt);\n\n        logger.log(level, context_fmt, std::forward&lt;Args&gt;(args)...);\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u751f\u6210\u3067\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<p><strong>1. JSON\u5f62\u5f0f\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u751f\u6210<\/strong><\/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 ConfigGenerator {\npublic:\n    struct DatabaseConfig {\n        std::string host;\n        int port;\n        std::string username;\n        std::string password;\n    };\n\n    struct ServerConfig {\n        std::string bind_address;\n        int port;\n        int max_connections;\n        std::string ssl_cert;\n    };\n\n    static std::string generate_config(const DatabaseConfig&amp; db,\n                                     const ServerConfig&amp; server) {\n        return std::format(R\"(\n{{\n    \"database\": {{\n        \"host\": \"{}\",\n        \"port\": {},\n        \"username\": \"{}\",\n        \"password\": \"{}\"\n    }},\n    \"server\": {{\n        \"bind_address\": \"{}\",\n        \"port\": {},\n        \"max_connections\": {},\n        \"ssl_cert\": \"{}\"\n    }}\n}})\", \n            db.host, db.port, db.username, db.password,\n            server.bind_address, server.port,\n            server.max_connections, server.ssl_cert);\n    }\n};<\/pre>\n\n\n\n<p><strong>2. \u74b0\u5883\u5909\u6570\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306e\u751f\u6210<\/strong><\/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 EnvFileGenerator {\npublic:\n    struct AppConfig {\n        std::string app_name;\n        std::string environment;\n        std::map&lt;std::string, std::string&gt; variables;\n    };\n\n    static std::string generate_env_file(const AppConfig&amp; config) {\n        std::string result;\n\n        \/\/ \u30d8\u30c3\u30c0\u30fc\u30b3\u30e1\u30f3\u30c8\n        result += std::format(\n            \"# Environment configuration for {}\\n\"\n            \"# Environment: {}\\n\"\n            \"# Generated at: {:%Y-%m-%d %H:%M:%S}\\n\\n\",\n            config.app_name,\n            config.environment,\n            std::chrono::system_clock::now());\n\n        \/\/ \u74b0\u5883\u5909\u6570\u306e\u8a2d\u5b9a\n        for (const auto&amp; [key, value] : config.variables) {\n            result += std::format(\"{}={}\\n\", key, value);\n        }\n\n        return result;\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nint main() {\n    EnvFileGenerator::AppConfig config{\n        .app_name = \"MyApp\",\n        .environment = \"production\",\n        .variables = {\n            {\"DATABASE_URL\", \"postgres:\/\/localhost:5432\/myapp\"},\n            {\"REDIS_HOST\", \"localhost\"},\n            {\"REDIS_PORT\", \"6379\"},\n            {\"LOG_LEVEL\", \"info\"}\n        }\n    };\n\n    std::string env_file = EnvFileGenerator::generate_env_file(config);\n    std::ofstream(\".env\") &lt;&lt; env_file;\n}<\/pre>\n\n\n\n<p><strong>3. \u30de\u30eb\u30c1\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u8a2d\u5b9a\u751f\u6210\u5668<\/strong><\/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 MultiFormatConfigGenerator {\npublic:\n    enum class Format {\n        JSON,\n        YAML,\n        INI,\n        ENV\n    };\n\n    template&lt;typename T&gt;\n    static std::string generate(const T&amp; config, Format format) {\n        switch (format) {\n            case Format::JSON:\n                return generate_json(config);\n            case Format::YAML:\n                return generate_yaml(config);\n            case Format::INI:\n                return generate_ini(config);\n            case Format::ENV:\n                return generate_env(config);\n            default:\n                throw std::invalid_argument(\"Unsupported format\");\n        }\n    }\n\nprivate:\n    template&lt;typename T&gt;\n    static std::string generate_json(const T&amp; config) {\n        \/\/ JSON\u5f62\u5f0f\u306e\u751f\u6210\u5b9f\u88c5\n        return std::format(\"{{\\\"config\\\": {}}}\", to_json(config));\n    }\n\n    template&lt;typename T&gt;\n    static std::string generate_yaml(const T&amp; config) {\n        \/\/ YAML\u5f62\u5f0f\u306e\u751f\u6210\u5b9f\u88c5\n        return std::format(\"config:\\n  {}\", to_yaml(config));\n    }\n\n    \/\/ \u4ed6\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u751f\u6210\u30e1\u30bd\u30c3\u30c9...\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u4f8b\u306f\u3001std::format\u306e\u5b9f\u8df5\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u7279\u306b\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u306a\u5b9f\u88c5<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u9069\u5207\u306a\u5b9f\u88c5<\/li>\n\n\n\n<li>\u578b\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/li>\n\n\n\n<li>\u62e1\u5f35\u6027\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u57fa\u306b\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5408\u308f\u305b\u3066\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u5b9f\u88c5\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-15\">std::format\u306e\u5c06\u6765\u3068\u767a\u5c55<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">C++23\u4ee5\u964d\u3067\u306e\u6a5f\u80fd\u62e1\u5f35\u4e88\u5b9a<\/h3>\n\n\n\n<p>C++23\u304a\u3088\u3073\u305d\u308c\u4ee5\u964d\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u3001std::format\u306b\u95a2\u3057\u3066\u69d8\u3005\u306a\u62e1\u5f35\u3068\u6539\u5584\u304c\u4e88\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>1. C++23\u3067\u306e\u4e3b\u306a\u62e1\u5f35\u6a5f\u80fd<\/strong><\/p>\n\n\n\n<p>a) <code>std::format_string<\/code>\u306e\u5c0e\u5165<\/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\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6587\u5b57\u5217\u691c\u8a3c\ntemplate&lt;typename... Args&gt;\nstruct std::format_string {\n    constexpr format_string(const char* fmt) {\n        \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6587\u5b57\u5217\u3092\u691c\u8a3c\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid log_message(std::format_string&lt;std::string, int&gt; fmt,\n                const std::string&amp; str, int value) {\n    std::cout &lt;&lt; std::format(fmt, str, value);\n}\n\nint main() {\n    \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u691c\u8a3c\u3055\u308c\u308b\n    log_message(\"String: {}, Value: {}\", \"test\", 42);\n\n    \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff1a\u5f15\u6570\u306e\u578b\u304c\u4e00\u81f4\u3057\u306a\u3044\n    \/\/ log_message(\"String: {}, Value: {}\", 42, \"test\");\n}<\/pre>\n\n\n\n<p>b) \u7bc4\u56f2\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6a5f\u80fd<\/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\u30c6\u30ca\u5168\u4f53\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\nstd::vector&lt;int&gt; numbers = {1, 2, 3, 4, 5};\nstd::string result = std::format(\"Numbers: {}\", numbers);\n\/\/ \u51fa\u529b: \"Numbers: [1, 2, 3, 4, 5]\"\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u533a\u5207\u308a\u6587\u5b57\u306e\u6307\u5b9a\nauto formatted = std::format(\"Values: {:.2}\", numbers);\n\/\/ \u51fa\u529b: \"Values: 1, 2, 3, 4, 5\"\n\n\/\/ \u7bc4\u56f2\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\ntemplate&lt;typename T&gt;\nstruct std::formatter&lt;std::vector&lt;T&gt;&gt; {\n    bool use_brackets = true;\n    char separator = ',';\n\n    constexpr auto parse(format_parse_context&amp; ctx) {\n        auto it = ctx.begin();\n        if (it != ctx.end() &amp;&amp; *it == 'n') {\n            use_brackets = false;\n            ++it;\n        }\n        return it;\n    }\n\n    auto format(const std::vector&lt;T&gt;&amp; vec, format_context&amp; ctx) const {\n        if (vec.empty()) return ctx.out();\n\n        if (use_brackets)\n            format_to(ctx.out(), \"[\");\n\n        auto it = vec.begin();\n        format_to(ctx.out(), \"{}\", *it);\n\n        for (++it; it != vec.end(); ++it)\n            format_to(ctx.out(), \"{}{}\", separator, *it);\n\n        if (use_brackets)\n            format_to(ctx.out(), \"]\");\n\n        return ctx.out();\n    }\n};<\/pre>\n\n\n\n<p>c) \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316<\/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=\"\">\/\/ compile-time format string checking\nconstexpr auto format_str = \"Value: {}\";\nstatic_assert(std::is_format_string&lt;decltype(format_str)&gt;);\n\n\/\/ \u30e1\u30e2\u30ea\u30a2\u30ed\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u6700\u9069\u5316\nstruct format_buffer {\n    char buffer[1024];\n    size_t size = 0;\n\n    auto push_back(char c) {\n        if (size &lt; sizeof(buffer))\n            buffer[size++] = c;\n    }\n};\n\n\/\/ \u6700\u9069\u5316\u3055\u308c\u305f\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\nauto result = std::format_to(format_buffer{}, \"Value: {}\", 42);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u4eca\u5f8c\u306e\u5c55\u671b<\/h3>\n\n\n\n<p><strong>1. \u4e88\u60f3\u3055\u308c\u308b\u767a\u5c55\u65b9\u5411<\/strong><\/p>\n\n\n\n<p>a) \u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u5f0f\u306e\u62e1\u5f35<\/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=\"\">\/\/ \u6570\u5f0f\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\nauto result = std::format(\"Expression: {math}\", \n    std::math_expr(\"x^2 + 2x + 1\"));\n\n\/\/ \u6b63\u898f\u8868\u73fe\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\nauto pattern = std::format(\"Pattern: {regex}\",\n    std::regex(\"[a-z]+\\\\d+\"));<\/pre>\n\n\n\n<p>b) \u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/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=\"\">\/\/ \u52d5\u7684\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6307\u5b9a\nclass DynamicFormatter {\npublic:\n    template&lt;typename T&gt;\n    std::string format_value(const T&amp; value,\n                           const FormatOptions&amp; options) {\n        \/\/ \u5b9f\u884c\u6642\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u9069\u7528\n        return std::format(options.get_format_string(), value);\n    }\n};<\/pre>\n\n\n\n<p><strong>2. \u5c06\u6765\u7684\u306a\u6a5f\u80fd\u8981\u671b\u3068\u63d0\u6848<\/strong><\/p>\n\n\n<div id=\"id-69ab7dfc-bffa-4bf7-86cd-f6c18a0a2cb3\">\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6a5f\u80fd<\/th><th>\u8aac\u660e<\/th><th>\u60f3\u5b9a\u3055\u308c\u308b\u7528\u9014<\/th><\/tr><\/thead><tbody><tr><td>\u30ab\u30b9\u30bf\u30e0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6587\u6cd5<\/td><td>\u30e6\u30fc\u30b6\u30fc\u5b9a\u7fa9\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u69cb\u6587\u3092\u30b5\u30dd\u30fc\u30c8<\/td><td>\u7279\u5b9a\u30c9\u30e1\u30a4\u30f3\u5411\u3051\u306e\u8868\u73fe<\/td><\/tr><tr><td>\u975e\u540c\u671f\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/td><td>\u5927\u91cf\u30c7\u30fc\u30bf\u306e\u975e\u540c\u671f\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u51e6\u7406<\/td><td>\u30ed\u30b0\u51e6\u7406\u3001\u30c7\u30fc\u30bf\u5909\u63db<\/td><\/tr><tr><td>\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8<\/td><td>\u518d\u5229\u7528\u53ef\u80fd\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30d1\u30bf\u30fc\u30f3<\/td><td>\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3001\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u751f\u6210<\/td><\/tr><tr><td>\u30a4\u30f3\u30bf\u30fc\u30ca\u30b7\u30e7\u30ca\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3<\/td><td>\u9ad8\u5ea6\u306a\u56fd\u969b\u5316\u5bfe\u5fdc<\/td><td>\u30b0\u30ed\u30fc\u30d0\u30eb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n\n\n<p><strong>3. \u5b9f\u88c5\u4e0a\u306e\u8ab2\u984c\u3068\u89e3\u6c7a\u65b9\u5411<\/strong><\/p>\n\n\n\n<p>a) \u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/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\u6700\u9069\u5316\u306e\u5f37\u5316\ntemplate&lt;typename... Args&gt;\nconstexpr auto optimize_format(std::string_view fmt, Args&amp;&amp;... args) {\n    \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u51e6\u7406\u3092\u6700\u9069\u5316\n    return std::format(fmt, std::forward&lt;Args&gt;(args)...);\n}\n\n\/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u6539\u5584\nclass OptimizedFormatter {\n    static constexpr size_t BufferSize = 1024;\n    std::array&lt;char, BufferSize&gt; buffer;\n\npublic:\n    template&lt;typename... Args&gt;\n    std::string_view format(std::string_view fmt, Args&amp;&amp;... args) {\n        auto result = std::format_to(buffer.data(), fmt,\n                                   std::forward&lt;Args&gt;(args)...);\n        return std::string_view(buffer.data(),\n                              result - buffer.data());\n    }\n};<\/pre>\n\n\n\n<p>b) \u578b\u5b89\u5168\u6027\u306e\u5f37\u5316<\/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=\"\">\/\/ \u578b\u30c1\u30a7\u30c3\u30af\u306e\u5f37\u5316\ntemplate&lt;typename... Args&gt;\nconcept Formattable = requires(Args... args) {\n    std::format(\"{}\", args...);\n};\n\n\/\/ \u4f7f\u7528\u4f8b\ntemplate&lt;Formattable... Args&gt;\nvoid safe_format(std::string_view fmt, Args&amp;&amp;... args) {\n    std::format(fmt, std::forward&lt;Args&gt;(args)...);\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5c06\u6765\u7684\u306a\u767a\u5c55\u306b\u3088\u308a\u3001std::format\u306f\u3088\u308a\u5f37\u529b\u3067\u67d4\u8edf\u306a\u6587\u5b57\u5217\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u306a\u308b\u3053\u3068\u304c\u671f\u5f85\u3055\u308c\u307e\u3059\u3002\u958b\u767a\u8005\u306f\u3001\u3053\u308c\u3089\u306e\u65b0\u6a5f\u80fd\u3092\u898b\u636e\u3048\u306a\u304c\u3089\u3001\u73fe\u5728\u306e\u30b3\u30fc\u30c9\u30d9\u30fc\u30b9\u3092\u8a2d\u8a08\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\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],"tags":[],"class_list":{"0":"post-2030","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-cpp","7":"nothumb"},"_links":{"self":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2030","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=2030"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2030\/revisions"}],"predecessor-version":[{"id":2031,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2030\/revisions\/2031"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2030"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2030"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2030"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}