{"id":1771,"date":"2025-03-24T08:49:56","date_gmt":"2025-03-23T23:49:56","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=1771"},"modified":"2025-03-24T08:49:56","modified_gmt":"2025-03-23T23:49:56","slug":"c-auto%e3%81%ae%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%ef%bc%9a%e6%ad%a3%e3%81%97%e3%81%84%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%a85%e3%81%a4%e3%81%ae%e5%ae%9f%e8%b7%b5%e3%83%86%e3%82%af%e3%83%8b","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=1771","title":{"rendered":"C++ auto\u306e\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a\u6b63\u3057\u3044\u4f7f\u3044\u65b9\u30685\u3064\u306e\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af"},"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++ auto \u3068\u306f\uff1a\u578b\u63a8\u8ad6\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">auto\u30ad\u30fc\u30ef\u30fc\u30c9\u304c\u89e3\u6c7a\u3059\u308b\u578b\u6307\u5b9a\u306e\u554f\u984c\u70b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">C++11\u3067\u5c0e\u5165\u3055\u308c\u305f\u7406\u7531\u3068\u80cc\u666f<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-3\">auto\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9\u3068\u57fa\u672c\u7684\u306a\u6587\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-4\">\u5909\u6570\u5ba3\u8a00\u3067\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-5\">\u623b\u308a\u5024\u306e\u578b\u63a8\u8ad6\u3068\u3057\u3066\u306e\u4f7f\u7528<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-6\">\u30e9\u30e0\u30c0\u5f0f\u3067\u306eauto\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-7\">\u5b9f\u8df5\u7684\u306aauto\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-8\">\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u6271\u3046\u969b\u306eauto\u306e\u52b9\u679c\u7684\u306a\u4f7f\u3044\u65b9<\/a>      <\/li>      <li>        <a href=\"#i-9\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306e\u578b\u63a8\u8ad6\u7c21\u7565\u5316<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-10\">ranged-for\u30eb\u30fc\u30d7\u3067\u306eauto\u306e\u6d3b\u7528\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-11\">auto\u3092\u4f7f\u3046\u969b\u306e\u6ce8\u610f\u70b9\u3068\u843d\u3068\u3057\u7a74<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-12\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u3068\u6700\u9069\u5316\u306e\u30b3\u30c4<\/a>      <\/li>      <li>        <a href=\"#i-13\">\u53ef\u8aad\u6027\u3092\u7121\u8996\u3057\u306a\u3044\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-14\">\u521d\u671f\u5316\u6642\u306e\u4e88\u671f\u305b\u306c\u578b\u5909\u63db\u3092\u9632\u3050<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-15\">\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u306e\u305f\u3081\u306eauto\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-16\">\u5927\u898f\u6a21\u958b\u767a\u3067\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u6307\u91dd<\/a>      <\/li>      <li>        <a href=\"#i-17\">\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u306e\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-18\">\u5c06\u6765\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u4f7f\u7528\u65b9\u6cd5<\/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++ auto \u3068\u306f\uff1a\u578b\u63a8\u8ad6\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">auto\u30ad\u30fc\u30ef\u30fc\u30c9\u304c\u89e3\u6c7a\u3059\u308b\u578b\u6307\u5b9a\u306e\u554f\u984c\u70b9<\/h3>\n\n\n\n<p>C++\u306b\u304a\u3051\u308b\u5909\u6570\u5ba3\u8a00\u3067\u306f\u3001\u901a\u5e38\u660e\u793a\u7684\u306a\u578b\u6307\u5b9a\u304c\u5fc5\u8981\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u3053\u308c\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u554f\u984c\u70b9\u304c\u3042\u308a\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5197\u9577\u306a\u578b\u6307\u5b9a<\/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;std::string&gt;::iterator it = container.begin();  \/\/ \u9577\u3044\u578b\u540d\u306e\u8a18\u8ff0\u304c\u5fc5\u8981\nstd::map&lt;std::string, std::vector&lt;int&gt;&gt;::const_iterator map_it = complex_map.begin();  \/\/ \u3055\u3089\u306b\u5197\u9577<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u578b\u306e\u4e0d\u4e00\u81f4\u306b\u3088\u308b\u30a8\u30e9\u30fc<\/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=\"\">\/\/ \u578b\u306e\u4e0d\u4e00\u81f4\u306b\u3088\u308b\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306e\u4f8b\nlong long result = someFunction();  \/\/ \u623b\u308a\u5024\u304cunsigned long long\u306e\u5834\u5408\u3001\u6697\u9ed9\u306e\u578b\u5909\u63db\u3067\u554f\u984c\u767a\u751f<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u578b\u306e\u63a8\u8ad6\u306e\u56f0\u96e3\u3055<\/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=\"\">template&lt;typename T, typename U&gt;\nvoid processValues(T t, U u) {\n    \/\/ \u623b\u308a\u5024\u306e\u578b\u3092\u660e\u793a\u7684\u306b\u66f8\u304f\u306e\u304c\u56f0\u96e3\n    decltype(t + u) result = t + u;  \/\/ C++11\u4ee5\u524d\u306f\u3001\u3053\u306e\u66f8\u304d\u65b9\u3059\u3089\u4e0d\u53ef\u80fd\n}<\/pre>\n\n\n\n<p>auto\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u3001\u3053\u308c\u3089\u306e\u554f\u984c\u3092\u89e3\u6c7a\u3057\u3001\u30b3\u30fc\u30c9\u3092\u3088\u308a\u7c21\u6f54\u3067\u5b89\u5168\u306b\u3057\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=\"\">auto it = container.begin();  \/\/ \u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u578b\u3092\u81ea\u52d5\u63a8\u8ad6\nauto map_it = complex_map.begin();  \/\/ \u8907\u96d1\u306a\u578b\u3082\u81ea\u52d5\u63a8\u8ad6\nauto result = someFunction();  \/\/ \u623b\u308a\u5024\u306e\u578b\u3092\u6b63\u78ba\u306b\u63a8\u8ad6<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">C++11\u3067\u5c0e\u5165\u3055\u308c\u305f\u7406\u7531\u3068\u80cc\u666f<\/h3>\n\n\n\n<p>C++11\u3067auto\u304c\u5c0e\u5165\u3055\u308c\u305f\u4e3b\u306a\u7406\u7531\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u306e\u7c21\u6f54\u6027\u5411\u4e0a<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u7c21\u7565\u5316<\/li>\n\n\n\n<li>\u9577\u3044\u578b\u540d\u306e\u8a18\u8ff0\u3092\u56de\u907f<\/li>\n\n\n\n<li>\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u5411\u4e0a<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u578b\u5b89\u5168\u6027\u306e\u5f37\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6697\u9ed9\u306e\u578b\u5909\u63db\u306b\u3088\u308b\u554f\u984c\u3092\u9632\u6b62<\/li>\n\n\n\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u578b\u306e\u6b63\u78ba\u306a\u63a8\u8ad6<\/li>\n\n\n\n<li>const\u4fee\u98fe\u5b50\u306e\u4fdd\u6301<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30e2\u30c0\u30f3\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30bf\u30a4\u30eb\u306e\u5b9f\u73fe<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u95a2\u6570\u578b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u5bb9\u6613\u5316<\/li>\n\n\n\n<li>\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u4fc3\u9032<\/li>\n\n\n\n<li>\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\u306e\u5bb9\u6613\u5316<\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\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=\"\">\/\/ \u30e2\u30c0\u30f3\u306aC++\u30b9\u30bf\u30a4\u30eb\u306e\u4f8b\nauto lambda = [](const auto&amp; x) { return x * 2; };  \/\/ \u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u30e9\u30e0\u30c0\nauto result = std::accumulate(vec.begin(), vec.end(), 0);  \/\/ \u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u7d50\u679c\u578b\u3092\u81ea\u52d5\u63a8\u8ad6\n\n\/\/ \u8907\u96d1\u306a\u578b\u306e\u63a8\u8ad6\nauto [first, second] = std::make_pair(1, \"hello\");  \/\/ \u69cb\u9020\u5316\u675f\u7e1b\uff08C++17\uff09<\/pre>\n\n\n\n<p>auto\u306e\u5c0e\u5165\u306b\u3088\u308a\u3001C++\u306f\u4ee5\u4e0b\u306e\u5229\u70b9\u3092\u7372\u5f97\u3057\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a<\/li>\n\n\n\n<li>\u578b\u306e\u5b89\u5168\u6027\u78ba\u4fdd<\/li>\n\n\n\n<li>\u958b\u767a\u52b9\u7387\u306e\u5411\u4e0a<\/li>\n\n\n\n<li>\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u306e\u6539\u5584<\/li>\n\n\n\n<li>\u30e2\u30c0\u30f3\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u624b\u6cd5\u306e\u63a1\u7528<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5229\u70b9\u306b\u3088\u308a\u3001auto\u306f\u73fe\u4ee3\u306eC++\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u4e0d\u53ef\u6b20\u306a\u6a5f\u80fd\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-3\">auto\u306e\u6b63\u3057\u3044\u4f7f\u3044\u65b9\u3068\u57fa\u672c\u7684\u306a\u6587\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-4\">\u5909\u6570\u5ba3\u8a00\u3067\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>auto\u306e\u57fa\u672c\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306f\u3001\u5909\u6570\u5ba3\u8a00\u6642\u306e\u578b\u6307\u5b9a\u3068\u3057\u3066\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u4e3b\u306a\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3\u3092\u793a\u3057\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=\"\">\/\/ \u57fa\u672c\u7684\u306a\u5909\u6570\u5ba3\u8a00\nauto integer = 42;              \/\/ int\u578b\u3068\u3057\u3066\u63a8\u8ad6\nauto floating = 3.14;          \/\/ double\u578b\u3068\u3057\u3066\u63a8\u8ad6\nauto text = \"Hello\";           \/\/ const char*\u3068\u3057\u3066\u63a8\u8ad6\nauto str = std::string(\"World\"); \/\/ std::string\u578b\u3068\u3057\u3066\u63a8\u8ad6\n\n\/\/ const\u4fee\u98fe\u5b50\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\nconst auto pi = 3.14159;       \/\/ const double\u578b\u3068\u3057\u3066\u63a8\u8ad6\nauto const e = 2.71828;        \/\/ \u540c\u4e0a\u3001const\u306e\u4f4d\u7f6e\u306f\u524d\u5f8c\u3069\u3061\u3089\u3067\u3082\u53ef\n\n\/\/ \u53c2\u7167\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\nauto&amp; ref = integer;           \/\/ int&amp;\u3068\u3057\u3066\u63a8\u8ad6\nconst auto&amp; const_ref = floating; \/\/ const double&amp;\u3068\u3057\u3066\u63a8\u8ad6\n\n\/\/ \u30dd\u30a4\u30f3\u30bf\u3068\u306e\u4f7f\u7528\nauto* ptr = &amp;integer;          \/\/ int*\u3068\u3057\u3066\u63a8\u8ad6\nconst auto* const_ptr = &amp;floating; \/\/ const double*\u3068\u3057\u3066\u63a8\u8ad6<\/pre>\n\n\n\n<p>\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>auto\u306f\u521d\u671f\u5316\u304c\u5fc5\u9808\u3067\u3059<\/li>\n\n\n\n<li>const\u3084\u30dd\u30a4\u30f3\u30bf\u3001\u53c2\u7167\u306e\u4fee\u98fe\u5b50\u306f\u660e\u793a\u7684\u306b\u66f8\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059<\/li>\n\n\n\n<li>\u578b\u63a8\u8ad6\u306f\u521d\u671f\u5316\u5f0f\u304b\u3089\u884c\u308f\u308c\u307e\u3059<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u623b\u308a\u5024\u306e\u578b\u63a8\u8ad6\u3068\u3057\u3066\u306e\u4f7f\u7528<\/h3>\n\n\n\n<p>\u95a2\u6570\u306e\u623b\u308a\u5024\u578b\u3068\u3057\u3066auto\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30d1\u30bf\u30fc\u30f3\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=\"\">\/\/ \u57fa\u672c\u7684\u306a\u623b\u308a\u5024\u578b\u63a8\u8ad6\nauto calculateSum(int a, int b) {\n    return a + b;  \/\/ \u623b\u308a\u5024\u578b\u306fint\n}\n\n\/\/ \u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u95a2\u6570\u3067\u306e\u4f7f\u7528\ntemplate&lt;typename T, typename U&gt;\nauto add(T t, U u) {\n    return t + u;  \/\/ \u623b\u308a\u5024\u578b\u306f\u5f15\u6570\u306e\u578b\u306b\u4f9d\u5b58\n}\n\n\/\/ \u5f8c\u7f6e\u623b\u308a\u5024\u578b\u69cb\u6587\uff08\u30c8\u30ec\u30a4\u30ea\u30f3\u30b0\u30ea\u30bf\u30fc\u30f3\u578b\uff09\nauto multiply(int a, double b) -&gt; double {\n    return a * b;\n}\n\n\/\/ \u30e9\u30e0\u30c0\u5f0f\u306e\u623b\u308a\u5024\u578b\nauto getLambda = []() -&gt; int {\n    return 42;\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u30e9\u30e0\u30c0\u5f0f\u3067\u306eauto\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>C++14\u4ee5\u964d\u3001\u30e9\u30e0\u30c0\u5f0f\u3067auto\u3092\u6d3b\u7528\u3059\u308b\u65b9\u6cd5\u304c\u5897\u3048\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=\"\">\/\/ \u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u30e9\u30e0\u30c0\uff08C++14\uff09\nauto genericLambda = [](auto x, auto y) {\n    return x + y;\n};\n\n\/\/ \u30e9\u30e0\u30c0\u306e\u30ad\u30e3\u30d7\u30c1\u30e3\u3067\u306eauto\nauto value = 42;\nauto captureLambda = () {\n    return value;\n};\n\n\/\/ \u3088\u308a\u8907\u96d1\u306a\u4f8b\uff1a\nauto advancedLambda = [](auto&amp;&amp;... args) {\n    return std::make_tuple(std::forward&lt;decltype(args)&gt;(args)...);\n};\n\n\/\/ \u578b\u5236\u7d04\u4ed8\u304d\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30e9\u30e0\u30c0\uff08C++20\uff09\nauto constrainedLambda = []&lt;typename T&gt;(T x) requires std::integral&lt;T&gt; {\n    return x * 2;\n};<\/pre>\n\n\n\n<p>\u5b9f\u8df5\u7684\u306a\u4f7f\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=\"\">#include &lt;vector&gt;\n#include &lt;algorithm&gt;\n#include &lt;string&gt;\n\nclass DataProcessor {\npublic:\n    template&lt;typename Container&gt;\n    static auto processData(const Container&amp; data) {\n        std::vector&lt;std::decay_t&lt;typename Container::value_type&gt;&gt; result;\n\n        \/\/ \u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u30e9\u30e0\u30c0\u3092\u4f7f\u7528\u3057\u305f\u51e6\u7406\n        auto transformer = [](const auto&amp; item) {\n            return std::make_pair(item, sizeof(item));\n        };\n\n        std::transform(data.begin(), data.end(), \n                      std::back_inserter(result),\n                      transformer);\n\n        return result;\n    }\n};<\/pre>\n\n\n\n<p>\u3053\u306e\u4f7f\u7528\u65b9\u6cd5\u306b\u3088\u308a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30fc\u30c9\u306e\u67d4\u8edf\u6027\u304c\u5411\u4e0a<\/li>\n\n\n\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u304c\u7c21\u7565\u5316<\/li>\n\n\n\n<li>\u578b\u5b89\u5168\u6027\u3092\u4fdd\u3061\u306a\u304c\u3089\u6c4e\u7528\u7684\u306a\u30b3\u30fc\u30c9\u304c\u8a18\u8ff0\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<p>auto\u306e\u6b63\u3057\u3044\u4f7f\u7528\u306f\u3001\u30b3\u30fc\u30c9\u306e\u4fdd\u5b88\u6027\u3068\u53ef\u8aad\u6027\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u91cd\u8981\u306a\u8981\u7d20\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-7\">\u5b9f\u8df5\u7684\u306aauto\u306e\u6d3b\u7528\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u30a4\u30c6\u30ec\u30fc\u30bf\u3092\u6271\u3046\u969b\u306eauto\u306e\u52b9\u679c\u7684\u306a\u4f7f\u3044\u65b9<\/h3>\n\n\n\n<p>STL\u30b3\u30f3\u30c6\u30ca\u306e\u30a4\u30c6\u30ec\u30fc\u30bf\u51e6\u7406\u306f\u3001auto\u306e\u6700\u3082\u6709\u7528\u306a\u4f7f\u7528\u5834\u9762\u306e\u4e00\u3064\u3067\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=\"\">#include &lt;map&gt;\n#include &lt;string&gt;\n#include &lt;vector&gt;\n\n\/\/ \u8907\u96d1\u306a\u30b3\u30f3\u30c6\u30ca\u306e\u64cd\u4f5c\u4f8b\nvoid demonstrateIterators() {\n    std::map&lt;std::string, std::vector&lt;int&gt;&gt; data_store;\n\n    \/\/ \u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u578b\u3092\u81ea\u52d5\u63a8\u8ad6\n    for (auto it = data_store.begin(); it != data_store.end(); ++it) {\n        auto&amp; [key, value] = *it;  \/\/ \u69cb\u9020\u5316\u675f\u7e1b\u3068auto\u306e\u7d44\u307f\u5408\u308f\u305b\n\n        \/\/ \u30cd\u30b9\u30c8\u3055\u308c\u305f\u30b3\u30f3\u30c6\u30ca\u306e\u30a4\u30c6\u30ec\u30fc\u30b7\u30e7\u30f3\n        for (auto value_it = value.begin(); value_it != value.end(); ++value_it) {\n            *value_it *= 2;  \/\/ \u5024\u306e\u64cd\u4f5c\n        }\n    }\n\n    \/\/ const_iterator\u306e\u4f7f\u7528\n    for (auto const_it = data_store.cbegin(); const_it != data_store.cend(); ++const_it) {\n        \/\/ \u8aad\u307f\u53d6\u308a\u5c02\u7528\u306e\u64cd\u4f5c\n        auto const&amp; values = const_it-&gt;second;\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306e\u578b\u63a8\u8ad6\u7c21\u7565\u5316<\/h3>\n\n\n\n<p>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306f\u3001auto\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u8907\u96d1\u306a\u578b\u306e\u8a18\u8ff0\u3092\u7c21\u7565\u5316\u3067\u304d\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=\"\">#include &lt;type_traits&gt;\n#include &lt;utility&gt;\n\ntemplate&lt;typename T&gt;\nclass SmartContainer {\npublic:\n    \/\/ \u30a8\u30a4\u30ea\u30a2\u30b9\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3068\u7d44\u307f\u5408\u308f\u305b\u305f\u4f7f\u7528\n    template&lt;typename U&gt;\n    auto createWrapper(U&amp;&amp; value) {\n        using DecayedType = std::decay_t&lt;U&gt;;\n        return WrapperType&lt;DecayedType&gt;{std::forward&lt;U&gt;(value)};\n    }\n\n    \/\/ \u623b\u308a\u5024\u578b\u304c\u8907\u96d1\u306a\u5834\u5408\u306e\u4f7f\u7528\u4f8b\n    template&lt;typename Iterator&gt;\n    auto processRange(Iterator begin, Iterator end) {\n        using ValueType = typename std::iterator_traits&lt;Iterator&gt;::value_type;\n        std::vector&lt;ValueType&gt; result;\n\n        while (begin != end) {\n            auto processed = processElement(*begin);\n            result.push_back(std::move(processed));\n            ++begin;\n        }\n\n        return result;\n    }\n\nprivate:\n    template&lt;typename U&gt;\n    struct WrapperType {\n        U value;\n    };\n\n    template&lt;typename U&gt;\n    auto processElement(const U&amp; elem) {\n        return std::make_pair(elem, sizeof(elem));\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">ranged-for\u30eb\u30fc\u30d7\u3067\u306eauto\u306e\u6d3b\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>ranged-for\u30eb\u30fc\u30d7\u3068auto\u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u3001\u30e2\u30c0\u30f3C++\u3067\u306e\u6700\u3082\u4e00\u822c\u7684\u306a\u4f7f\u7528\u30d1\u30bf\u30fc\u30f3\u306e\u4e00\u3064\u3067\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=\"\">#include &lt;vector&gt;\n#include &lt;string&gt;\n\nclass DataProcessor {\npublic:\n    static void processCollection() {\n        std::vector&lt;std::string&gt; data = {\"one\", \"two\", \"three\"};\n\n        \/\/ \u57fa\u672c\u7684\u306a\u4f7f\u7528\u6cd5\n        for (const auto&amp; item : data) {\n            \/\/ \u53c2\u7167\u3067\u53d7\u3051\u53d6\u308b\u3053\u3068\u3067\u4e0d\u8981\u306a\u30b3\u30d4\u30fc\u3092\u9632\u3050\n            processItem(item);\n        }\n\n        \/\/ \u5024\u306e\u5909\u66f4\u304c\u5fc5\u8981\u306a\u5834\u5408\n        for (auto&amp; item : data) {\n            item.append(\"_processed\");\n        }\n\n        \/\/ \u69cb\u9020\u5316\u675f\u7e1b\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\n        std::vector&lt;std::pair&lt;std::string, int&gt;&gt; pairs = {{\"one\", 1}, {\"two\", 2}};\n        for (const auto&amp; [name, value] : pairs) {\n            processPair(name, value);\n        }\n    }\n\nprivate:\n    static void processItem(const std::string&amp; item) {\n        \/\/ \u51e6\u7406\u306e\u5b9f\u88c5\n    }\n\n    static void processPair(const std::string&amp; name, int value) {\n        \/\/ \u30da\u30a2\u306e\u51e6\u7406\u5b9f\u88c5\n    }\n};<\/pre>\n\n\n\n<p>\u5b9f\u8df5\u7684\u306a\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30a4\u30c6\u30ec\u30fc\u30bf\u4f7f\u7528\u6642\u306e\u6ce8\u610f\u70b9\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>const_iterator\u3092\u9069\u5207\u306b\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u30b3\u30d4\u30fc\u3092\u907f\u3051\u308b\u305f\u3081\u3001\u53c2\u7167\u3092\u6d3b\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u69cb\u9020\u5316\u675f\u7e1b\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u53ef\u8aad\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3067\u306e\u6d3b\u7528\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8907\u96d1\u306a\u578b\u540d\u306e\u8a18\u8ff0\u3092\u7c21\u7565\u5316<\/li>\n\n\n\n<li>\u578b\u63a8\u8ad6\u3092\u6d3b\u7528\u3057\u305f\u6c4e\u7528\u7684\u306a\u5b9f\u88c5<\/li>\n\n\n\n<li>STL\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u306e\u7d44\u307f\u5408\u308f\u305b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>ranged-for\u30eb\u30fc\u30d7\u3067\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\uff1a<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>const\u53c2\u7167\u3092\u57fa\u672c\u3068\u3059\u308b<\/li>\n\n\n\n<li>\u5fc5\u8981\u306a\u5834\u5408\u306e\u307f\u975econst\u53c2\u7167\u3092\u4f7f\u7528<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u5b9f\u88c5<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u52b9\u7387\u7684\u306a\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-11\">auto\u3092\u4f7f\u3046\u969b\u306e\u6ce8\u610f\u70b9\u3068\u843d\u3068\u3057\u7a74<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u3068\u6700\u9069\u5316\u306e\u30b3\u30c4<\/h3>\n\n\n\n<p>auto\u306e\u4f7f\u7528\u306f\u3001\u610f\u56f3\u3057\u306a\u3044\u30b3\u30d4\u30fc\u3084\u578b\u5909\u63db\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u4e3b\u306a\u6ce8\u610f\u70b9\u3068\u5bfe\u7b56\u3092\u793a\u3057\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=\"\">#include &lt;vector&gt;\n#include &lt;string&gt;\n\nclass PerformanceExample {\npublic:\n    static void demonstratePerformanceIssues() {\n        std::vector&lt;std::string&gt; strings = {\"hello\", \"world\"};\n\n        \/\/ \u60aa\u3044\u4f8b\uff1a\u4e0d\u8981\u306a\u30b3\u30d4\u30fc\u304c\u767a\u751f\n        for (auto item : strings) {  \/\/ \u5024\u6e21\u3057\u306b\u3088\u308b\u30b3\u30d4\u30fc\n            process(item);\n        }\n\n        \/\/ \u826f\u3044\u4f8b\uff1a\u53c2\u7167\u3092\u4f7f\u7528\u3057\u3066\u30b3\u30d4\u30fc\u3092\u56de\u907f\n        for (const auto&amp; item : strings) {  \/\/ const\u53c2\u7167\u3067\u30b3\u30d4\u30fc\u3092\u9632\u3050\n            process(item);\n        }\n\n        \/\/ \u60aa\u3044\u4f8b\uff1a\u4e88\u671f\u3057\u306a\u3044\u578b\u5909\u63db\n        auto size = strings.size();  \/\/ std::vector&lt;T&gt;::size_type \u3067\u306f\u306a\u304f int \u3084 long \u306b\u306a\u308b\u53ef\u80fd\u6027\n\n        \/\/ \u826f\u3044\u4f8b\uff1a\u660e\u793a\u7684\u306a\u578b\u6307\u5b9a\n        std::vector&lt;std::string&gt;::size_type correct_size = strings.size();\n        \/\/ \u307e\u305f\u306f\n        auto proper_size = std::size(strings);  \/\/ C++17\u4ee5\u964d\n    }\n\nprivate:\n    static void process(const std::string&amp; str) {\n        \/\/ \u51e6\u7406\u306e\u5b9f\u88c5\n    }\n};<\/pre>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u306e\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5927\u304d\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u5e38\u306b\u53c2\u7167\u3067\u53d7\u3051\u53d6\u308b<\/li>\n\n\n\n<li>\u30b3\u30f3\u30c6\u30ca\u306e\u30b5\u30a4\u30ba\u578b\u306f\u9069\u5207\u306a\u578b\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u4e0d\u8981\u306a\u578b\u5909\u63db\u3092\u907f\u3051\u308b<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u53ef\u8aad\u6027\u3092\u7121\u8996\u3057\u306a\u3044\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u65b9\u6cd5<\/h3>\n\n\n\n<p>auto\u306e\u904e\u5ea6\u306a\u4f7f\u7528\u306f\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u3092\u640d\u306a\u3046\u53ef\u80fd\u6027\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=\"\">class ReadabilityExample {\npublic:\n    static void demonstrateReadability() {\n        \/\/ \u60aa\u3044\u4f8b\uff1a\u578b\u304c\u4e0d\u660e\u78ba\n        auto result = processComplexData();  \/\/ \u623b\u308a\u5024\u306e\u578b\u304c\u4e0d\u660e\u78ba\n\n        \/\/ \u826f\u3044\u4f8b\uff1a\u30b3\u30e1\u30f3\u30c8\u3067\u578b\u3092\u660e\u793a\n        auto result_with_comment = processComplexData();  \/\/ returns std::pair&lt;int, std::string&gt;\n\n        \/\/ \u3088\u308a\u826f\u3044\u4f8b\uff1a\u578b\u304c\u660e\u78ba\u306a\u5909\u6570\u540d\u3092\u4f7f\u7528\n        auto [count, name] = processComplexData();  \/\/ \u69cb\u9020\u5316\u675f\u7e1b\u3067\u610f\u56f3\u3092\u660e\u78ba\u306b\n\n        \/\/ \u60aa\u3044\u4f8b\uff1a\u8907\u96d1\u306a\u5f0f\u3067\u578b\u304c\u63a8\u6e2c\u56f0\u96e3\n        auto complex_result = foo().bar().process().getValue();\n\n        \/\/ \u826f\u3044\u4f8b\uff1a\u4e2d\u9593\u7d50\u679c\u3092\u660e\u793a\u7684\u306b\u793a\u3059\n        auto intermediate = foo().bar();\n        auto processed = intermediate.process();\n        auto final_result = processed.getValue();\n    }\n\nprivate:\n    static std::pair&lt;int, std::string&gt; processComplexData() {\n        return {42, \"result\"};\n    }\n};<\/pre>\n\n\n\n<p>\u53ef\u8aad\u6027\u3092\u4fdd\u3064\u305f\u3081\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8907\u96d1\u306a\u5f0f\u3067\u306f\u4e2d\u9593\u7d50\u679c\u3092\u5909\u6570\u306b\u683c\u7d0d<\/li>\n\n\n\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u30b3\u30e1\u30f3\u30c8\u3067\u578b\u3092\u660e\u793a<\/li>\n\n\n\n<li>\u610f\u56f3\u304c\u660e\u78ba\u306a\u5909\u6570\u540d\u3092\u4f7f\u7528<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u521d\u671f\u5316\u6642\u306e\u4e88\u671f\u305b\u306c\u578b\u5909\u63db\u3092\u9632\u3050<\/h3>\n\n\n\n<p>auto\u306b\u3088\u308b\u578b\u63a8\u8ad6\u3067\u3001\u4e88\u671f\u305b\u306c\u578b\u5909\u63db\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\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=\"\">class TypeConversionExample {\npublic:\n    static void demonstrateTypeConversion() {\n        \/\/ \u60aa\u3044\u4f8b\uff1a\u610f\u56f3\u3057\u306a\u3044\u578b\u5909\u63db\n        auto integer1 = 3.14;  \/\/ double \u2192 int \u3078\u306e\u6697\u9ed9\u306e\u578b\u5909\u63db\n        auto integer2 = {1};   \/\/ std::initializer_list&lt;int&gt; \u3068\u3057\u3066\u63a8\u8ad6\n\n        \/\/ \u826f\u3044\u4f8b\uff1a\u660e\u793a\u7684\u306a\u578b\u5909\u63db\n        auto floating = 3.14;  \/\/ \u660e\u78ba\u306bdouble\u3068\u3057\u3066\u4fdd\u6301\n        auto single_value = 1;  \/\/ \u5358\u4e00\u306e\u5024\u3068\u3057\u3066\u521d\u671f\u5316\n\n        \/\/ \u60aa\u3044\u4f8b\uff1aconstness \u306e\u640d\u5931\n        const std::vector&lt;int&gt; const_vec = {1, 2, 3};\n        auto vec_copy = const_vec;  \/\/ constness \u304c\u5931\u308f\u308c\u308b\n\n        \/\/ \u826f\u3044\u4f8b\uff1aconstness \u306e\u4fdd\u6301\n        const auto preserved_const = const_vec;  \/\/ constness \u3092\u4fdd\u6301\n    }\n\n    \/\/ \u623b\u308a\u5024\u578b\u306e\u63a8\u8ad6\u3067\u306e\u6ce8\u610f\u70b9\n    template&lt;typename T&gt;\n    static auto getValue(T t) {\n        \/\/ \u60aa\u3044\u4f8b\uff1a\u4e88\u671f\u305b\u306c\u578b\u5909\u63db\n        if (t &gt; 0)\n            return 1;    \/\/ int\n        else\n            return 1.0;  \/\/ double\n        \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff1a\u7570\u306a\u308b\u578b\u3092\u8fd4\u305d\u3046\u3068\u3057\u3066\u3044\u308b\n    }\n};<\/pre>\n\n\n\n<p>\u578b\u5909\u63db\u3092\u9632\u3050\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>\u521d\u671f\u5316\u6642\u306e\u578b\u3092\u610f\u8b58\u3059\u308b<\/li>\n\n\n\n<li>\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u660e\u793a\u7684\u306a\u578b\u6307\u5b9a\u3092\u884c\u3046<\/li>\n\n\n\n<li>constness \u3092\u9069\u5207\u306b\u6271\u3046<\/li>\n\n\n\n<li>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u95a2\u6570\u3067\u306e\u623b\u308a\u5024\u578b\u306b\u6ce8\u610f<\/li>\n<\/ol>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6ce8\u610f\u70b9\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u5bfe\u51e6\u3059\u308b\u3053\u3068\u3067\u3001auto\u306e\u5229\u70b9\u3092\u6700\u5927\u9650\u306b\u6d3b\u304b\u3057\u306a\u304c\u3089\u3001\u5b89\u5168\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-15\">\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u306e\u305f\u3081\u306eauto\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-16\">\u5927\u898f\u6a21\u958b\u767a\u3067\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u6307\u91dd<\/h3>\n\n\n\n<p>\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067auto\u3092\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3059\u308b\u305f\u3081\u306e\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u3092\u793a\u3057\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=\"\">\/\/ \u30c1\u30fc\u30e0\u958b\u767a\u306e\u305f\u3081\u306eauto\u4f7f\u7528\u30ac\u30a4\u30c9\u30e9\u30a4\u30f3\u4f8b\nnamespace guidelines {\n\nclass AutoUsageGuidelines {\npublic:\n    \/\/ \u63a8\u5968\uff1a\u660e\u78ba\u306a\u6587\u8108\u304c\u3042\u308b\u5834\u5408\u306eauto\u4f7f\u7528\n    static void demonstrateGoodPractices() {\n        std::vector&lt;int&gt; numbers = {1, 2, 3, 4, 5};\n\n        \/\/ \u30a4\u30c6\u30ec\u30fc\u30bf\u306e\u4f7f\u7528\uff1a\u578b\u304c\u660e\u78ba\u3067\u5197\u9577\u6027\u3092\u907f\u3051\u3089\u308c\u308b\n        for (const auto&amp; num : numbers) {\n            process(num);\n        }\n\n        \/\/ \u30e9\u30e0\u30c0\u5f0f\uff1a\u578b\u304c\u8907\u96d1\u3067\u81ea\u660e\u306a\u5834\u5408\n        auto processor = [](const auto&amp; value) {\n            return std::make_pair(value, std::to_string(value));\n        };\n\n        \/\/ \u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u7d50\u679c\uff1a\u623b\u308a\u5024\u306e\u578b\u304c\u6587\u8108\u304b\u3089\u660e\u78ba\n        auto max_element = std::max_element(numbers.begin(), numbers.end());\n    }\n\n    \/\/ \u975e\u63a8\u5968\uff1a\u578b\u304c\u4e0d\u660e\u78ba\u306b\u306a\u308b\u5834\u5408\n    static void demonstratePoorPractices() {\n        \/\/ \u907f\u3051\u308b\u3079\u304d\uff1a\u578b\u304c\u4e0d\u660e\u78ba\u3067\u8ffd\u8de1\u304c\u56f0\u96e3\n        auto result = complexOperation();  \/\/ \u578b\u304c\u4e0d\u660e\u78ba\n\n        \/\/ \u4ee3\u308f\u308a\u306b\uff1a\n        ComplexResult typed_result = complexOperation();  \/\/ \u578b\u304c\u660e\u78ba\n        \/\/ \u307e\u305f\u306f\n        auto  = complexOperation();  \/\/ \u69cb\u9020\u5316\u675f\u7e1b\u3067\u610f\u56f3\u3092\u660e\u78ba\u306b\n    }\n\nprivate:\n    struct ComplexResult {\n        int value;\n        bool status;\n    };\n\n    static ComplexResult complexOperation() {\n        return {42, true};\n    }\n\n    static void process(int value) {\n        \/\/ \u51e6\u7406\u306e\u5b9f\u88c5\n    }\n};\n\n} \/\/ namespace guidelines<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u3067\u306e\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8<\/h3>\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\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u6642\u306e\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u5b9f\u88c5\u4f8b\nnamespace code_review {\n\nclass AutoReviewChecklist {\npublic:\n    \/\/ \u30ec\u30d3\u30e5\u30fc\u5bfe\u8c61\u306e\u30b3\u30fc\u30c9\u30d1\u30bf\u30fc\u30f3\n    static void reviewExamples() {\n        \/\/ \u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c81: \u4e0d\u9069\u5207\u306aauto\u306e\u4f7f\u7528\n        auto simple_int = 42;  \/\/ \u8981\u691c\u8a0e\uff1a\u5358\u7d14\u306a\u578b\u306b\u4e0d\u8981\u306aauto\n\n        \/\/ \u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c82: \u9069\u5207\u306a\u4f7f\u7528\u4f8b\n        std::vector&lt;std::string&gt; strings = {\"hello\", \"world\"};\n        auto it = std::find(strings.begin(), strings.end(), \"hello\");  \/\/ OK\n\n        \/\/ \u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c83: const\u4fee\u98fe\u5b50\u306e\u78ba\u8a8d\n        const auto&amp; const_ref = strings;  \/\/ OK: const\u3068\u53c2\u7167\u3092\u9069\u5207\u306b\u4f7f\u7528\n\n        \/\/ \u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c84: \u578b\u5909\u63db\u306e\u78ba\u8a8d\n        auto size = strings.size();  \/\/ \u8981\u78ba\u8a8d\uff1asize_type\u304c\u9069\u5207\u306b\u63a8\u8ad6\u3055\u308c\u3066\u3044\u308b\u304b\n    }\n};\n\n} \/\/ namespace code_review<\/pre>\n\n\n\n<p>\u30ec\u30d3\u30e5\u30fc\u6642\u306e\u4e3b\u306a\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>auto\u306e\u4f7f\u7528\u304c\u9069\u5207\u306a\u6587\u8108\u304b<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u306f\u306a\u3044\u304b<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u610f\u56f3\u304c\u660e\u78ba\u304b<\/li>\n\n\n\n<li>\u4fdd\u5b88\u6027\u3092\u640d\u306a\u3063\u3066\u3044\u306a\u3044\u304b<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u5c06\u6765\u306e\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u4f7f\u7528\u65b9\u6cd5<\/h3>\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=\"\">\/\/ \u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u3092\u8003\u616e\u3057\u305fauto\u306e\u4f7f\u7528\u4f8b\nnamespace maintenance {\n\ntemplate&lt;typename T&gt;\nclass MaintainableCode {\npublic:\n    \/\/ \u5c06\u6765\u306e\u5909\u66f4\u306b\u5f37\u3044\u5b9f\u88c5\n    static void demonstrateMaintainableCode() {\n        \/\/ \u826f\u3044\u4f8b\uff1a\u578b\u306e\u5b9f\u88c5\u8a73\u7d30\u304c\u5909\u66f4\u3055\u308c\u3066\u3082\u5f71\u97ff\u3092\u53d7\u3051\u306b\u304f\u3044\n        auto factory = createFactory();  \/\/ \u30d5\u30a1\u30af\u30c8\u30ea\u306e\u623b\u308a\u5024\u578b\u304c\u5909\u66f4\u3055\u308c\u3066\u3082\u5f71\u97ff\u306a\u3057\n\n        \/\/ \u826f\u3044\u4f8b\uff1a\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u623b\u308a\u5024\u578b\u304c\u5909\u66f4\u3055\u308c\u3066\u3082\u5bfe\u5fdc\u53ef\u80fd\n        auto result = factory.processData();\n\n        \/\/ \u826f\u3044\u4f8b\uff1a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5909\u66f4\u306b\u5f37\u3044\n        for (const auto&amp; item : factory.getItems()) {\n            process(item);\n        }\n    }\n\n    \/\/ \u30c9\u30ad\u30e5\u30e1\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3\u306e\u4f8b\n    static void documentedExample() {\n        \/\/ \u578b\u60c5\u5831\u3092\u30b3\u30e1\u30f3\u30c8\u3067\u660e\u793a\n        auto result = processComplexData();  \/\/ returns ProcessResult&lt;T&gt;\n\n        \/\/ \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u5909\u66f4\u306e\u5c65\u6b74\u3092\u8a18\u9332\n        \/\/ Version 1.0: Returns int\n        \/\/ Version 2.0: Returns ProcessResult&lt;T&gt;\n        auto version_dependent = getVersionSpecificResult();\n    }\n\nprivate:\n    static auto createFactory() {\n        return Factory&lt;T&gt;();\n    }\n\n    template&lt;typename U&gt;\n    struct Factory {\n        std::vector&lt;U&gt; getItems() { return {}; }\n        U processData() { return U{}; }\n    };\n\n    static void process(const T&amp; item) {\n        \/\/ \u51e6\u7406\u306e\u5b9f\u88c5\n    }\n};\n\n} \/\/ namespace maintenance<\/pre>\n\n\n\n<p>\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u3092\u9ad8\u3081\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>\u30b3\u30fc\u30c9\u306e\u6587\u66f8\u5316<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u91cd\u8981\u306a\u578b\u60c5\u5831\u3092\u30b3\u30e1\u30f3\u30c8\u3067\u8a18\u8f09<\/li>\n\n\n\n<li>\u5909\u66f4\u5c65\u6b74\u306e\u7ba1\u7406<\/li>\n\n\n\n<li>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u8aac\u660e<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5909\u66f4\u306b\u5f37\u3044\u8a2d\u8a08<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b9f\u88c5\u8a73\u7d30\u3078\u306e\u4f9d\u5b58\u3092\u907f\u3051\u308b<\/li>\n\n\n\n<li>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b89\u5b9a\u6027\u3092\u91cd\u8996<\/li>\n\n\n\n<li>\u578b\u306e\u62bd\u8c61\u5316\u3092\u9069\u5207\u306b\u6d3b\u7528<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c1\u30fc\u30e0\u958b\u767a\u3067\u306e\u898f\u7d04<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u547d\u540d\u898f\u5247\u306e\u7d71\u4e00<\/li>\n\n\n\n<li>auto\u306e\u4f7f\u7528\u57fa\u6e96\u306e\u660e\u78ba\u5316<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u30ec\u30d3\u30e5\u30fc\u30c1\u30a7\u30c3\u30af\u30ea\u30b9\u30c8\u306e\u6574\u5099<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u5207\u306b\u5b9f\u8df5\u3059\u308b\u3053\u3068\u3067\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u30c1\u30fc\u30e0\u958b\u767a\u306b\u9069\u3057\u305f\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\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-1771","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\/1771","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=1771"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1771\/revisions"}],"predecessor-version":[{"id":1772,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/1771\/revisions\/1772"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1771"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1771"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1771"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}