{"id":2165,"date":"2025-03-24T08:48:07","date_gmt":"2025-03-23T23:48:07","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=2165"},"modified":"2025-03-24T08:48:32","modified_gmt":"2025-03-23T23:48:32","slug":"c-enum%e3%82%af%e3%83%a9%e3%82%b9%e3%81%ae%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%ef%bc%9a%e5%ae%89%e5%85%a8%e6%80%a7%e3%81%a8%e3%82%b3%e3%83%bc%e3%83%89%e5%93%81%e8%b3%aa%e3%82%92%e9%ab%98","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=2165","title":{"rendered":"C++ enum\u30af\u30e9\u30b9\u306e\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a\u5b89\u5168\u6027\u3068\u30b3\u30fc\u30c9\u54c1\u8cea\u3092\u9ad8\u3081\u308b7\u3064\u306e\u5b9f\u8df5\u7684\u306a\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++ enum \u30af\u30e9\u30b9\u3068\u306f\uff1a\u5f37\u529b\u306a\u578b\u5b89\u5168\u6027\u3092\u3082\u305f\u3089\u3059\u65b0\u6a5f\u80fd<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u5f93\u6765\u306e enum \u306e\u554f\u984c\u70b9\u3068\u9650\u754c<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-2\">enum \u30af\u30e9\u30b9\u304c\u89e3\u6c7a\u3059\u308b3\u3064\u306e\u91cd\u8981\u306a\u8ab2\u984c<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">enum \u30af\u30e9\u30b9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u5b9f\u88c5\u65b9\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">enum \u30af\u30e9\u30b9\u306e\u5ba3\u8a00\u3068\u5b9a\u7fa9\u306e\u6b63\u3057\u3044\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-6\">\u30b9\u30b3\u30fc\u30d7\u4ed8\u304d\u5217\u6319\u578b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-7\">enum class\u306b\u3088\u308b\u578b\u5b89\u5168\u6027\u306e\u5411\u4e0a<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-8\">\u6697\u9ed9\u306e\u578b\u5909\u63db\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9632\u3050\u5177\u4f53\u7684\u306a\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-9\">\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u578b\u30c1\u30a7\u30c3\u30af\u3092\u6700\u5927\u9650\u6d3b\u7528\u3059\u308b<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-10\">\u5b9f\u8df5\u7684\u306aenum class\u306e\u6d3b\u7528\u30d1\u30bf\u30fc\u30f3<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-11\">\u30b9\u30c6\u30fc\u30c8\u30de\u30b7\u30f3\u306e\u5b9f\u88c5\u4f8b\u3068\u30dd\u30a4\u30f3\u30c8<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-12\">\u8a2d\u5b9a\u5024\u306e\u7ba1\u7406\u306b\u304a\u3051\u308b\u6d3b\u7528\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-13\">enum class\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u6700\u9069\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-14\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">\u5b9f\u884c\u6642\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u306e\u524a\u6e1b\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-16\">enum \u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\u3068\u5bfe\u51e6\u6cd5<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-17\">\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74\u3068\u305d\u306e\u56de\u907f\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-18\">\u30d0\u30c3\u30af\u30ef\u30fc\u30c9\u4e92\u63db\u6027\u306e\u78ba\u4fdd<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-19\">enum \u30af\u30e9\u30b9\u306e\u5b9f\u52d9\u3067\u306e\u5fdc\u7528\u4f8b<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-20\">\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u6d3b\u7528\u4f8b<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-21\">\u4fdd\u5b88\u6027\u5411\u4e0a\u306e\u305f\u3081\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/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++ enum \u30af\u30e9\u30b9\u3068\u306f\uff1a\u5f37\u529b\u306a\u578b\u5b89\u5168\u6027\u3092\u3082\u305f\u3089\u3059\u65b0\u6a5f\u80fd<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u5f93\u6765\u306e enum \u306e\u554f\u984c\u70b9\u3068\u9650\u754c<\/h3>\n\n\n\n<p>\u5f93\u6765\u306eC++\u306b\u304a\u3051\u308benum\uff08\u5217\u6319\u578b\uff09\u306b\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u91cd\u5927\u306a\u554f\u984c\u70b9\u304c\u5b58\u5728\u3057\u3066\u3044\u307e\u3057\u305f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u540d\u524d\u7a7a\u9593\u306e\u6c5a\u67d3<\/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=\"\">\/\/ \u5f93\u6765\u306eenum\nenum Color { RED, GREEN, BLUE };\nenum TrafficLight { RED, YELLOW, GREEN }; \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff1aRED\u3068GREEN\u304c\u91cd\u8907<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u578b\u5b89\u5168\u6027\u306e\u6b20\u5982<\/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=\"\">enum OldEnum { A = 1, B = 2 };\nint x = A; \/\/ \u6697\u9ed9\u306e\u578b\u5909\u63db\u304c\u53ef\u80fd\nif (x == 1) { \/* ... *\/ } \/\/ \u6570\u5024\u3068\u306e\u76f4\u63a5\u6bd4\u8f03\u304c\u53ef\u80fd<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30b5\u30a4\u30ba\u6307\u5b9a\u306e\u5236\u9650<\/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=\"\">\/\/ \u5f93\u6765\u306eenum\u306f\u30b5\u30a4\u30ba\u6307\u5b9a\u304c\u67d4\u8edf\u3067\u306a\u3044\nenum SmallEnum { X = 1, Y = 2 }; \/\/ \u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u81ea\u52d5\u7684\u306b\u30b5\u30a4\u30ba\u3092\u6c7a\u5b9a<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">enum \u30af\u30e9\u30b9\u304c\u89e3\u6c7a\u3059\u308b3\u3064\u306e\u91cd\u8981\u306a\u8ab2\u984c<\/h3>\n\n\n\n<p>C++11\u3067\u5c0e\u5165\u3055\u308c\u305fenum class\u306f\u3001\u3053\u308c\u3089\u306e\u554f\u984c\u3092\u52b9\u679c\u7684\u306b\u89e3\u6c7a\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30b3\u30fc\u30d7\u306e\u5236\u5fa1<\/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=\"\">enum class Color { RED, GREEN, BLUE };\nenum class TrafficLight { RED, YELLOW, GREEN }; \/\/ \u554f\u984c\u306a\u304f\u30b3\u30f3\u30d1\u30a4\u30eb\u53ef\u80fd\n\/\/ \u4f7f\u7528\u6642\u306f\u660e\u793a\u7684\u306a\u30b9\u30b3\u30fc\u30d7\u6307\u5b9a\u304c\u5fc5\u8981\nColor c = Color::RED;<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u5f37\u529b\u306a\u578b\u5b89\u5168\u6027<\/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=\"\">enum class NewEnum { A = 1, B = 2 };\nint x = NewEnum::A;        \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff1a\u6697\u9ed9\u306e\u578b\u5909\u63db\u304c\u7981\u6b62\nif (x == 1) { \/* ... *\/ }  \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff1a\u6570\u5024\u3068\u306e\u76f4\u63a5\u6bd4\u8f03\u304c\u7981\u6b62\nif (x == NewEnum::A) { \/* ... *\/ }  \/\/ OK\uff1a\u540c\u3058\u578b\u3068\u306e\u6bd4\u8f03\u306f\u53ef\u80fd<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u67d4\u8edf\u306a\u57fa\u5e95\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=\"\">enum class BigEnum : uint64_t { \/\/ \u660e\u793a\u7684\u306a\u30b5\u30a4\u30ba\u6307\u5b9a\u304c\u53ef\u80fd\n    LARGE_VALUE = 0xFFFFFFFFFFFFFFFF\n};<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"i-3\">enum class\u304c\u3082\u305f\u3089\u3059\u8ffd\u52a0\u306e\u30e1\u30ea\u30c3\u30c8<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5217\u6319\u5b50\u306e\u4f7f\u7528\u7b87\u6240\u304c\u660e\u78ba\u306b\u306a\u308b<\/li>\n\n\n\n<li>\u610f\u56f3\u3057\u306a\u3044\u578b\u5909\u63db\u3092\u9632\u3050\u3053\u3068\u3067\u30d0\u30b0\u306e\u767a\u898b\u304c\u5bb9\u6613\u306b<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4fdd\u5b88\u6027\u306e\u5411\u4e0a<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b9\u30b3\u30fc\u30d7\u4ed8\u304d\u306e\u305f\u3081\u3001\u540d\u524d\u306e\u885d\u7a81\u30ea\u30b9\u30af\u304c\u4f4e\u6e1b<\/li>\n\n\n\n<li>\u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u3088\u308b\u578b\u30c1\u30a7\u30c3\u30af\u304c\u5f37\u5316\u3055\u308c\u3001\u65e9\u671f\u306e\u30d0\u30b0\u767a\u898b\u304c\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u5c06\u6765\u306e\u62e1\u5f35\u6027<\/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=\"\">enum class Status : uint8_t {\n    OK = 0,\n    ERROR = 1,\n    PENDING = 2\n    \/\/ \u5f8c\u304b\u3089\u65b0\u3057\u3044\u5024\u3092\u8ffd\u52a0\u3057\u3066\u3082\u3001\u65e2\u5b58\u306e\u30b3\u30fc\u30c9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u306b\u304f\u3044\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u7279\u5fb4\u306b\u3088\u308a\u3001enum class\u306f\u7279\u306b\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3084\u30c1\u30fc\u30e0\u958b\u767a\u306b\u304a\u3044\u3066\u3001\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u3068\u4fdd\u5b88\u6027\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u91cd\u8981\u306a\u6a5f\u80fd\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u578b\u5b89\u5168\u6027\u3068\u660e\u78ba\u306a\u30b9\u30b3\u30fc\u30d7\u5236\u5fa1\u306b\u3088\u308a\u3001\u591a\u304f\u306e\u4e00\u822c\u7684\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30a8\u30e9\u30fc\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u3001\u3088\u308a\u5805\u7262\u306a\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">enum \u30af\u30e9\u30b9\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u5b9f\u88c5\u65b9\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">enum \u30af\u30e9\u30b9\u306e\u5ba3\u8a00\u3068\u5b9a\u7fa9\u306e\u6b63\u3057\u3044\u65b9\u6cd5<\/h3>\n\n\n\n<p>enum class\u306e\u57fa\u672c\u7684\u306a\u5ba3\u8a00\u65b9\u6cd5\u304b\u3089\u3001\u3088\u308a\u9ad8\u5ea6\u306a\u4f7f\u7528\u65b9\u6cd5\u307e\u3067\u6bb5\u968e\u7684\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u57fa\u672c\u7684\u306a\u5ba3\u8a00\u65b9\u6cd5<\/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=\"\">\/\/ \u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u5ba3\u8a00\nenum class SimpleStatus {\n    OK,      \/\/ 0\n    ERROR,   \/\/ 1\n    PENDING  \/\/ 2\n};\n\n\/\/ \u57fa\u5e95\u578b\u3092\u6307\u5b9a\u3057\u305f\u5ba3\u8a00\nenum class Flags : uint8_t {\n    NONE = 0x00,\n    READ = 0x01,\n    WRITE = 0x02,\n    EXECUTE = 0x04\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u521d\u671f\u5024\u306e\u660e\u793a\u7684\u306a\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=\"\">enum class HttpStatus : uint16_t {\n    OK = 200,\n    CREATED = 201,\n    BAD_REQUEST = 400,\n    NOT_FOUND = 404,\n    SERVER_ERROR = 500\n};<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30af\u30e9\u30b9\u5185\u3067\u306e enum class \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=\"\">class FileSystem {\npublic:\n    enum class Permission : uint8_t {\n        NONE = 0,\n        READ = 1 &lt;&lt; 0,\n        WRITE = 1 &lt;&lt; 1,\n        EXECUTE = 1 &lt;&lt; 2,\n        ALL = READ | WRITE | EXECUTE\n    };\n\n    bool checkPermission(Permission perm) {\n        return (m_currentPermission &amp; static_cast&lt;uint8_t&gt;(perm)) != 0;\n    }\n\nprivate:\n    Permission m_currentPermission{Permission::NONE};\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u30b9\u30b3\u30fc\u30d7\u4ed8\u304d\u5217\u6319\u578b\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u547d\u540d\u898f\u5247\u3068\u30b9\u30bf\u30a4\u30eb<\/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=\"\">\/\/ \u63a8\u5968\u3055\u308c\u308b\u547d\u540d\u898f\u5247\nenum class LogLevel {  \/\/ \u30d1\u30b9\u30ab\u30eb\u30b1\u30fc\u30b9\u3092\u4f7f\u7528\n    Debug,    \/\/ \u5404\u8981\u7d20\u306f\u30a2\u30c3\u30d1\u30fc\u30ad\u30e3\u30e1\u30eb\u30b1\u30fc\u30b9\n    Info,\n    Warning,\n    Error,\n    Critical\n};\n\n\/\/ \u610f\u5473\u306e\u3042\u308b\u540d\u524d\u3068\u5024\u306e\u4f7f\u7528\nenum class DayOfWeek {\n    Sunday = 0,     \/\/ \u660e\u793a\u7684\u306a\u5024\u306e\u5272\u308a\u5f53\u3066\n    Monday = 1,\n    Tuesday = 2,\n    Wednesday = 3,\n    Thursday = 4,\n    Friday = 5,\n    Saturday = 6\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u95a2\u6570\u306e\u5b9f\u88c5<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">enum class Temperature : int {\n    Freezing = 0,\n    Cold = 10,\n    Normal = 20,\n    Warm = 25,\n    Hot = 30\n};\n\n\/\/ \u6587\u5b57\u5217\u5909\u63db\u7528\u306e\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u95a2\u6570\nstd::string temperatureToString(Temperature temp) {\n    switch (temp) {\n        case Temperature::Freezing: return \"Freezing\";\n        case Temperature::Cold: return \"Cold\";\n        case Temperature::Normal: return \"Normal\";\n        case Temperature::Warm: return \"Warm\";\n        case Temperature::Hot: return \"Hot\";\n        default: return \"Unknown\";\n    }\n}\n\n\/\/ \u6570\u5024\u304b\u3089\u306e\u5909\u63db\u95a2\u6570\nTemperature intToTemperature(int value) {\n    if (value &lt;= 0) return Temperature::Freezing;\n    else if (value &lt;= 10) return Temperature::Cold;\n    else if (value &lt;= 20) return Temperature::Normal;\n    else if (value &lt;= 25) return Temperature::Warm;\n    else return Temperature::Hot;\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9<\/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=\"\">enum class Priority : uint8_t {\n    Low = 0,\n    Medium = 1,\n    High = 2,\n    Critical = 3\n};\n\n\/\/ \u6bd4\u8f03\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\nconstexpr bool operator&lt;(Priority lhs, Priority rhs) {\n    return static_cast&lt;uint8_t&gt;(lhs) &lt; static_cast&lt;uint8_t&gt;(rhs);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nvoid processByPriority(Priority p) {\n    if (p &lt; Priority::High) {\n        \/\/ \u4f4e\u512a\u5148\u5ea6\u306e\u51e6\u7406\n    } else {\n        \/\/ \u9ad8\u512a\u5148\u5ea6\u306e\u51e6\u7406\n    }\n}<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u30d3\u30c3\u30c8\u6f14\u7b97\u306e\u30b5\u30dd\u30fc\u30c8<\/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=\"\">enum class Permissions : unsigned int {\n    None = 0,\n    Read = 1 &lt;&lt; 0,     \/\/ 1\n    Write = 1 &lt;&lt; 1,    \/\/ 2\n    Execute = 1 &lt;&lt; 2   \/\/ 4\n};\n\n\/\/ \u30d3\u30c3\u30c8\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\nconstexpr Permissions operator|(Permissions lhs, Permissions rhs) {\n    return static_cast&lt;Permissions&gt;(\n        static_cast&lt;unsigned int&gt;(lhs) | \n        static_cast&lt;unsigned int&gt;(rhs)\n    );\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nPermissions p = Permissions::Read | Permissions::Write;<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u578b\u5b89\u5168\u306a\u30b3\u30fc\u30c9\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u898f\u5247\u3092\u4e00\u8cab\u3057\u3066\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b3\u30fc\u30c9\u306e\u54c1\u8cea\u3068\u53ef\u8aad\u6027\u3092\u5927\u304d\u304f\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-7\">enum class\u306b\u3088\u308b\u578b\u5b89\u5168\u6027\u306e\u5411\u4e0a<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-8\">\u6697\u9ed9\u306e\u578b\u5909\u63db\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9632\u3050\u5177\u4f53\u7684\u306a\u65b9\u6cd5<\/h3>\n\n\n\n<p>enum class\u306f\u3001C++\u306b\u304a\u3051\u308b\u578b\u5b89\u5168\u6027\u3092\u5f37\u5316\u3059\u308b\u91cd\u8981\u306a\u6a5f\u80fd\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u4f8b\u3068\u9632\u5fa1\u7684\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u624b\u6cd5\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u6697\u9ed9\u306e\u578b\u5909\u63db\u306e\u9632\u6b62<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5f93\u6765\u306eenum\u3067\u306e\u554f\u984c\nenum OldColor { RED, GREEN, BLUE };\nint color = RED;  \/\/ \u6697\u9ed9\u306e\u578b\u5909\u63db\u304c\u53ef\u80fd\nint value = 2;\nOldColor c = value;  \/\/ \u5371\u967a\u306a\u6697\u9ed9\u306e\u578b\u5909\u63db\n\n\/\/ enum class\u3067\u306e\u6539\u5584\nenum class Color { Red, Green, Blue };\n\/\/ int color = Color::Red;  \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\n\/\/ Color c = 2;            \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\n\n\/\/ \u5fc5\u8981\u306a\u5834\u5408\u306f\u660e\u793a\u7684\u306a\u30ad\u30e3\u30b9\u30c8\u304c\u5fc5\u8981\nint color = static_cast&lt;int&gt;(Color::Red);  \/\/ OK\nColor c = static_cast&lt;Color&gt;(2);           \/\/ OK<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u578b\u5b89\u5168\u306a\u6f14\u7b97\u5b50\u306e\u5b9f\u88c5<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">enum class Direction {\n    North,\n    South,\n    East,\n    West\n};\n\n\/\/ \u5b89\u5168\u306a\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\nDirection operator+(Direction d1, Direction d2) = delete;  \/\/ \u52a0\u7b97\u3092\u7981\u6b62\nDirection operator-(Direction d1, Direction d2) = delete;  \/\/ \u6e1b\u7b97\u3092\u7981\u6b62\n\n\/\/ \u5fc5\u8981\u306a\u64cd\u4f5c\u306e\u307f\u3092\u8a31\u53ef\nDirection getOppositeDirection(Direction d) {\n    switch (d) {\n        case Direction::North: return Direction::South;\n        case Direction::South: return Direction::North;\n        case Direction::East:  return Direction::West;\n        case Direction::West:  return Direction::East;\n        default: throw std::invalid_argument(\"Invalid direction\");\n    }\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u578b\u30c1\u30a7\u30c3\u30af\u3092\u6700\u5927\u9650\u6d3b\u7528\u3059\u308b<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>static_assert \u306b\u3088\u308b\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u30c1\u30a7\u30c3\u30af<\/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=\"\">enum class StatusCode : uint16_t {\n    OK = 200,\n    NotFound = 404,\n    ServerError = 500\n};\n\n\/\/ \u57fa\u5e95\u578b\u306e\u30b5\u30a4\u30ba\u30c1\u30a7\u30c3\u30af\nstatic_assert(sizeof(StatusCode) == sizeof(uint16_t), \n    \"StatusCode must be 16 bits\");\n\n\/\/ \u5024\u306e\u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\nstatic_assert(static_cast&lt;uint16_t&gt;(StatusCode::OK) &lt; 600, \n    \"Invalid HTTP status code\");<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3092\u4f7f\u7528\u3057\u305f\u578b\u5b89\u5168\u6027\u306e\u5f37\u5316<\/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 EnumType&gt;\nclass EnumWrapper {\n    static_assert(std::is_enum_v&lt;EnumType&gt;, \n        \"EnumWrapper can only be used with enum types\");\n\npublic:\n    explicit EnumWrapper(EnumType value) : m_value(value) {}\n\n    EnumType get() const { return m_value; }\n\n    \/\/ \u578b\u5b89\u5168\u306a\u6bd4\u8f03\u6f14\u7b97\u5b50\n    bool operator==(const EnumWrapper&amp; other) const {\n        return m_value == other.m_value;\n    }\n\nprivate:\n    EnumType m_value;\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nenum class Priority { Low, Medium, High };\nEnumWrapper&lt;Priority&gt; p(Priority::Medium);\n\/\/ EnumWrapper&lt;int&gt; invalid; \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>constexpr \u306b\u3088\u308b\u578b\u5b89\u5168\u306a\u5909\u63db\u95a2\u6570<\/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=\"\">enum class Temperature : int {\n    Freezing = 0,\n    Boiling = 100\n};\n\nclass TemperatureConverter {\npublic:\n    static constexpr double toCelsius(Temperature t) {\n        return static_cast&lt;double&gt;(t);\n    }\n\n    static constexpr Temperature fromCelsius(double celsius) {\n        if constexpr (celsius &lt;= 0.0) {\n            return Temperature::Freezing;\n        } else if constexpr (celsius &gt;= 100.0) {\n            return Temperature::Boiling;\n        }\n        throw std::out_of_range(\"Temperature out of range\");\n    }\n};<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u578b\u5b89\u5168\u306a\u30d3\u30c3\u30c8\u6f14\u7b97\u306e\u5b9f\u88c5<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">enum class Permissions : unsigned int {\n    None = 0,\n    Read = 1 &lt;&lt; 0,\n    Write = 1 &lt;&lt; 1,\n    Execute = 1 &lt;&lt; 2\n};\n\n\/\/ \u578b\u5b89\u5168\u306a\u30d3\u30c3\u30c8\u6f14\u7b97\u5b50\nconstexpr Permissions operator|(Permissions lhs, Permissions rhs) {\n    return static_cast&lt;Permissions&gt;(\n        static_cast&lt;unsigned int&gt;(lhs) | \n        static_cast&lt;unsigned int&gt;(rhs)\n    );\n}\n\nconstexpr bool hasPermission(Permissions current, Permissions required) {\n    return (static_cast&lt;unsigned int&gt;(current) &amp; \n            static_cast&lt;unsigned int&gt;(required)) == \n           static_cast&lt;unsigned int&gt;(required);\n}\n\n\/\/ \u4f7f\u7528\u4f8b\nPermissions userPerms = Permissions::Read | Permissions::Write;\nbool canExecute = hasPermission(userPerms, Permissions::Execute);  \/\/ false<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u624b\u6cd5\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u591a\u304f\u306e\u30a8\u30e9\u30fc\u3092\u691c\u51fa\u3057\u3001\u5b9f\u884c\u6642\u306e\u4e88\u671f\u305b\u306c\u52d5\u4f5c\u3092\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u3053\u306e\u5c64\u306e\u578b\u5b89\u5168\u6027\u304c\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-10\">\u5b9f\u8df5\u7684\u306aenum class\u306e\u6d3b\u7528\u30d1\u30bf\u30fc\u30f3<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u30b9\u30c6\u30fc\u30c8\u30de\u30b7\u30f3\u306e\u5b9f\u88c5\u4f8b\u3068\u30dd\u30a4\u30f3\u30c8<\/h3>\n\n\n\n<p>\u30b9\u30c6\u30fc\u30c8\u30de\u30b7\u30f3\u306f\u3001enum class\u306e\u6700\u3082\u5b9f\u7528\u7684\u306a\u6d3b\u7528\u4f8b\u306e1\u3064\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u5177\u4f53\u7684\u306a\u5b9f\u88c5\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u57fa\u672c\u7684\u306a\u30b9\u30c6\u30fc\u30c8\u30de\u30b7\u30f3\u306e\u5b9f\u88c5<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DocumentProcessor {\npublic:\n    enum class State {\n        Draft,\n        UnderReview,\n        Approved,\n        Published,\n        Archived\n    };\n\n    enum class Event {\n        Submit,\n        Approve,\n        Reject,\n        Publish,\n        Archive\n    };\n\nprivate:\n    State currentState{State::Draft};\n\n    \/\/ \u72b6\u614b\u9077\u79fb\u30c6\u30fc\u30d6\u30eb\n    static constexpr bool isValidTransition(State from, Event event) {\n        switch (from) {\n            case State::Draft:\n                return event == Event::Submit;\n            case State::UnderReview:\n                return event == Event::Approve || event == Event::Reject;\n            case State::Approved:\n                return event == Event::Publish;\n            case State::Published:\n                return event == Event::Archive;\n            case State::Archived:\n                return false;\n            default:\n                return false;\n        }\n    }\n\npublic:\n    bool processEvent(Event event) {\n        if (!isValidTransition(currentState, event)) {\n            return false;\n        }\n\n        switch (currentState) {\n            case State::Draft:\n                if (event == Event::Submit) {\n                    currentState = State::UnderReview;\n                }\n                break;\n            case State::UnderReview:\n                if (event == Event::Approve) {\n                    currentState = State::Approved;\n                } else if (event == Event::Reject) {\n                    currentState = State::Draft;\n                }\n                break;\n            \/\/ \u4ed6\u306e\u72b6\u614b\u306e\u9077\u79fb\u51e6\u7406...\n        }\n        return true;\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u578b\u5b89\u5168\u306a\u30b9\u30c6\u30fc\u30c8\u9077\u79fb\u306e\u5b9f\u88c5<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">template&lt;typename State, typename Event&gt;\nclass StateMachine {\n    static_assert(std::is_enum_v&lt;State&gt;, \"State must be an enum class\");\n    static_assert(std::is_enum_v&lt;Event&gt;, \"Event must be an enum class\");\n\npublic:\n    using TransitionCallback = std::function&lt;void(State, State)&gt;;\n\n    void addTransition(State from, Event event, State to) {\n        transitions[std::make_pair(from, event)] = to;\n    }\n\n    void addCallback(TransitionCallback callback) {\n        callbacks.push_back(callback);\n    }\n\n    bool process(Event event) {\n        auto key = std::make_pair(currentState, event);\n        auto it = transitions.find(key);\n\n        if (it != transitions.end()) {\n            State oldState = currentState;\n            currentState = it-&gt;second;\n\n            for (const auto&amp; callback : callbacks) {\n                callback(oldState, currentState);\n            }\n            return true;\n        }\n        return false;\n    }\n\nprivate:\n    State currentState;\n    std::map&lt;std::pair&lt;State, Event&gt;, State&gt; transitions;\n    std::vector&lt;TransitionCallback&gt; callbacks;\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-12\">\u8a2d\u5b9a\u5024\u306e\u7ba1\u7406\u306b\u304a\u3051\u308b\u6d3b\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>enum class\u306f\u8a2d\u5b9a\u5024\u306e\u7ba1\u7406\u306b\u3082\u52b9\u679c\u7684\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u5b9f\u8df5\u7684\u306a\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u8a2d\u5b9a\u306e\u7ba1\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class AppConfig {\npublic:\n    enum class LogLevel : uint8_t {\n        Debug = 0,\n        Info = 1,\n        Warning = 2,\n        Error = 3,\n        Critical = 4\n    };\n\n    enum class Theme {\n        Light,\n        Dark,\n        System\n    };\n\n    struct Settings {\n        LogLevel logLevel{LogLevel::Info};\n        Theme theme{Theme::System};\n        bool notifications{true};\n    };\n\n    \/\/ \u8a2d\u5b9a\u5024\u306e\u691c\u8a3c\u3068\u9069\u7528\n    bool applySettings(const Settings&amp; newSettings) {\n        if (!validateSettings(newSettings)) {\n            return false;\n        }\n        settings = newSettings;\n        notifySettingsChanged();\n        return true;\n    }\n\nprivate:\n    Settings settings;\n\n    bool validateSettings(const Settings&amp; s) {\n        \/\/ LogLevel\u306e\u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\n        if (static_cast&lt;uint8_t&gt;(s.logLevel) &gt; \n            static_cast&lt;uint8_t&gt;(LogLevel::Critical)) {\n            return false;\n        }\n        return true;\n    }\n\n    void notifySettingsChanged() {\n        \/\/ \u8a2d\u5b9a\u5909\u66f4\u901a\u77e5\u306e\u5b9f\u88c5\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u578b\u5b89\u5168\u306a\u8a2d\u5b9a\u5024\u30a2\u30af\u30bb\u30b5<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class DatabaseConfig {\npublic:\n    enum class IsolationLevel {\n        ReadUncommitted,\n        ReadCommitted,\n        RepeatableRead,\n        Serializable\n    };\n\n    enum class ConnectionMode {\n        ReadOnly,\n        ReadWrite,\n        Admin\n    };\n\nprivate:\n    struct Config {\n        IsolationLevel isolation{IsolationLevel::ReadCommitted};\n        ConnectionMode mode{ConnectionMode::ReadOnly};\n        std::chrono::seconds timeout{30};\n    };\n\n    Config config;\n\npublic:\n    template&lt;typename T&gt;\n    class ConfigValue {\n    public:\n        explicit ConfigValue(T&amp; value) : value(value) {}\n\n        operator T() const { return value; }\n        ConfigValue&amp; operator=(const T&amp; newValue) {\n            value = newValue;\n            return *this;\n        }\n    private:\n        T&amp; value;\n    };\n\n    ConfigValue&lt;IsolationLevel&gt; isolation() {\n        return ConfigValue&lt;IsolationLevel&gt;(config.isolation);\n    }\n\n    ConfigValue&lt;ConnectionMode&gt; mode() {\n        return ConfigValue&lt;ConnectionMode&gt;(config.mode);\n    }\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u578b\u5b89\u5168\u6027\u3092\u4fdd\u3061\u306a\u304c\u3089\u67d4\u8edf\u306a\u8a2d\u5b9a\u7ba1\u7406\u3068\u30b9\u30c6\u30fc\u30c8\u7ba1\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u304c\u4fdd\u5b88\u6027\u3068\u4fe1\u983c\u6027\u306e\u5411\u4e0a\u306b\u5927\u304d\u304f\u8ca2\u732e\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-13\">enum class\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u6700\u9069\u5316<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/h3>\n\n\n\n<p>enum class\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u3092\u6700\u9069\u5316\u3059\u308b\u305f\u3081\u306e\u5177\u4f53\u7684\u306a\u624b\u6cd5\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u9069\u5207\u306a\u57fa\u5e95\u578b\u306e\u9078\u629e<\/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=\"\">\/\/ \u30e1\u30e2\u30ea\u52b9\u7387\u306e\u826f\u3044\u5b9f\u88c5\nenum class SmallEnum : uint8_t {  \/\/ 1\u30d0\u30a4\u30c8\n    A, B, C\n};\n\nenum class MediumEnum : uint16_t {  \/\/ 2\u30d0\u30a4\u30c8\n    X = 256,  \/\/ uint8_t\u3067\u306f\u8868\u73fe\u3067\u304d\u306a\u3044\n    Y, Z\n};\n\n\/\/ \u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u6bd4\u8f03\nstatic_assert(sizeof(SmallEnum) == 1, \"SmallEnum should be 1 byte\");\nstatic_assert(sizeof(MediumEnum) == 2, \"MediumEnum should be 2 bytes\");<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30e1\u30e2\u30ea\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u306e\u6700\u9069\u5316<\/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=\"\">\/\/ \u69cb\u9020\u4f53\u3067\u306eenum class\u306e\u914d\u7f6e\u6700\u9069\u5316\nstruct OptimizedStruct {\n    enum class Flag : uint8_t {\n        On,\n        Off\n    };\n\n    Flag flag1;           \/\/ 1\u30d0\u30a4\u30c8\n    Flag flag2;           \/\/ 1\u30d0\u30a4\u30c8\n    uint16_t value;       \/\/ 2\u30d0\u30a4\u30c8\n    \/\/ \u5408\u8a084\u30d0\u30a4\u30c8\n};\n\n\/\/ \u975e\u6700\u9069\u5316\u306e\u4f8b\nstruct UnoptimizedStruct {\n    enum class Status : uint32_t {  \/\/ 4\u30d0\u30a4\u30c8\n        Active,\n        Inactive\n    };\n\n    uint8_t data;        \/\/ 1\u30d0\u30a4\u30c8\n    Status status;       \/\/ 4\u30d0\u30a4\u30c8\n    \/\/ \u30d1\u30c7\u30a3\u30f3\u30b0\u306b\u3088\u308a\u5408\u8a0812\u30d0\u30a4\u30c8\n};\n\nstatic_assert(sizeof(OptimizedStruct) == 4);\nstatic_assert(sizeof(UnoptimizedStruct) == 12);<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u5b9f\u884c\u6642\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u306e\u524a\u6e1b\u65b9\u6cd5<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30a4\u30c3\u30c1\u6587\u306e\u6700\u9069\u5316<\/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=\"\">enum class Operation : uint8_t {\n    Add,\n    Subtract,\n    Multiply,\n    Divide\n};\n\n\/\/ \u6700\u9069\u5316\u3055\u308c\u305f\u30b9\u30a4\u30c3\u30c1\u6587\u306e\u5b9f\u88c5\nconstexpr int calculate(Operation op, int a, int b) {\n    switch (op) {  \/\/ \u30b3\u30f3\u30d1\u30a4\u30e9\u306b\u3088\u308a\u30b8\u30e3\u30f3\u30d7\u30c6\u30fc\u30d6\u30eb\u304c\u751f\u6210\u3055\u308c\u308b\n        case Operation::Add:      return a + b;\n        case Operation::Subtract: return a - b;\n        case Operation::Multiply: return a * b;\n        case Operation::Divide:   return a \/ b;\n    }\n    __builtin_unreachable();  \/\/ \u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u6700\u9069\u5316\u3092\u88dc\u52a9\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u30c6\u30fc\u30d6\u30eb\u306e\u6d3b\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=\"\">class EnumLookup {\npublic:\n    enum class ErrorCode : uint8_t {\n        None = 0,\n        InvalidInput = 1,\n        NetworkError = 2,\n        DatabaseError = 3\n        \/\/ \u4ed6\u306e\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\n    };\n\nprivate:\n    \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u751f\u6210\u3055\u308c\u308b\u30eb\u30c3\u30af\u30a2\u30c3\u30d7\u30c6\u30fc\u30d6\u30eb\n    static constexpr const char* ERROR_MESSAGES[] = {\n        \"No error\",\n        \"Invalid input provided\",\n        \"Network connection failed\",\n        \"Database operation failed\"\n    };\n\npublic:\n    \/\/ O(1)\u3067\u306e\u9ad8\u901f\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u53d6\u5f97\n    static constexpr const char* getErrorMessage(ErrorCode code) {\n        return ERROR_MESSAGES[static_cast&lt;size_t&gt;(code)];\n    }\n};<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class OptimizedStateManager {\npublic:\n    enum class State : uint8_t {\n        Idle,\n        Running,\n        Paused,\n        Stopped\n    };\n\nprivate:\n    \/\/ \u30d3\u30c3\u30c8\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u4f7f\u7528\u3057\u305f\u6700\u9069\u5316\n    struct StateFlags {\n        uint8_t isActive : 1;\n        uint8_t isPaused : 1;\n        uint8_t reserved : 6;\n    };\n\n    union {\n        State state;\n        StateFlags flags;\n        uint8_t rawValue;\n    };\n\npublic:\n    \/\/ \u9ad8\u901f\u306a\u72b6\u614b\u30c1\u30a7\u30c3\u30af\n    bool isActive() const {\n        return flags.isActive;\n    }\n\n    bool isPaused() const {\n        return flags.isPaused;\n    }\n\n    void setState(State newState) {\n        state = newState;\n    }\n};<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u30ad\u30e3\u30c3\u30b7\u30e5\u52b9\u7387\u306e\u6539\u5584<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class CacheOptimizedEnum {\npublic:\n    enum class CacheGroup : uint8_t {\n        Hot,    \/\/ \u983b\u7e41\u306b\u30a2\u30af\u30bb\u30b9\n        Warm,   \/\/ \u6642\u3005\u30a2\u30af\u30bb\u30b9\n        Cold    \/\/ \u3081\u3063\u305f\u306b\u30a2\u30af\u30bb\u30b9\u3057\u306a\u3044\n    };\n\n    struct Data {\n        CacheGroup group;\n        uint8_t padding[3];  \/\/ \u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u6700\u9069\u5316\n        int64_t value;\n    };\n\n    \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u52b9\u7387\u3092\u8003\u616e\u3057\u305f\u30c7\u30fc\u30bf\u69cb\u9020\n    std::array&lt;Data, 1024&gt; hotData;   \/\/ \u983b\u7e41\u306b\u30a2\u30af\u30bb\u30b9\n    std::array&lt;Data, 4096&gt; warmData;  \/\/ \u6642\u3005\u30a2\u30af\u30bb\u30b9\n    std::array&lt;Data, 8192&gt; coldData;  \/\/ \u3081\u3063\u305f\u306b\u30a2\u30af\u30bb\u30b9\u3057\u306a\u3044\n\n    \/\/ \u30ad\u30e3\u30c3\u30b7\u30e5\u52b9\u7387\u306e\u826f\u3044\u30a2\u30af\u30bb\u30b9\u65b9\u6cd5\n    Data* findData(uint32_t id, CacheGroup group) {\n        switch (group) {\n            case CacheGroup::Hot:\n                return id &lt; hotData.size() ? &amp;hotData[id] : nullptr;\n            case CacheGroup::Warm:\n                return id &lt; warmData.size() ? &amp;warmData[id] : nullptr;\n            case CacheGroup::Cold:\n                return id &lt; coldData.size() ? &amp;coldData[id] : nullptr;\n        }\n        return nullptr;\n    }\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001enum class\u3092\u4f7f\u7528\u3057\u306a\u304c\u3089\u3082\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u5927\u9650\u306b\u5f15\u304d\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u7d44\u307f\u8fbc\u307f\u30b7\u30b9\u30c6\u30e0\u3084\u9ad8\u6027\u80fd\u304c\u8981\u6c42\u3055\u308c\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u6700\u9069\u5316\u304c\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-16\">enum \u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\u3068\u5bfe\u51e6\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">\u4e00\u822c\u7684\u306a\u843d\u3068\u3057\u7a74\u3068\u305d\u306e\u56de\u907f\u65b9\u6cd5<\/h3>\n\n\n\n<p>enum class\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u3088\u304f\u906d\u9047\u3059\u308b\u554f\u984c\u3068\u305d\u306e\u89e3\u6c7a\u7b56\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u578b\u5909\u63db\u306b\u95a2\u3059\u308b\u554f\u984c<\/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=\"\">enum class Status {\n    OK,\n    Error\n};\n\n\/\/ \u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9\nvoid problematicFunction() {\n    Status s = Status::OK;\n    if (s) {}  \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff1a\u6697\u9ed9\u7684\u306abool\u3078\u306e\u5909\u63db\u304c\u3067\u304d\u306a\u3044\n    int i = s; \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\uff1a\u6697\u9ed9\u7684\u306a\u6574\u6570\u3078\u306e\u5909\u63db\u304c\u3067\u304d\u306a\u3044\n}\n\n\/\/ \u89e3\u6c7a\u7b56\uff1a\u660e\u793a\u7684\u306a\u5909\u63db\u95a2\u6570\u306e\u63d0\u4f9b\nclass StatusHandler {\npublic:\n    static bool isValid(Status s) {\n        return s == Status::OK;\n    }\n\n    static int toInt(Status s) {\n        return static_cast&lt;int&gt;(s);\n    }\n};\n\nvoid improvedFunction() {\n    Status s = Status::OK;\n    if (StatusHandler::isValid(s)) {}  \/\/ OK\n    int i = StatusHandler::toInt(s);   \/\/ OK\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30b7\u30ea\u30a2\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u306e\u554f\u984c<\/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=\"\">enum class Color {\n    Red,\n    Green,\n    Blue\n};\n\n\/\/ \u554f\u984c\uff1a\u76f4\u63a5\u7684\u306a\u6587\u5b57\u5217\u5909\u63db\u304c\u3067\u304d\u306a\u3044\n\/\/ \u89e3\u6c7a\u7b56\uff1a\u5909\u63db\u95a2\u6570\u306e\u5b9f\u88c5\nclass ColorConverter {\npublic:\n    static std::string toString(Color c) {\n        switch (c) {\n            case Color::Red:   return \"Red\";\n            case Color::Green: return \"Green\";\n            case Color::Blue:  return \"Blue\";\n            default: throw std::invalid_argument(\"Unknown color\");\n        }\n    }\n\n    static Color fromString(const std::string&amp; s) {\n        if (s == \"Red\")   return Color::Red;\n        if (s == \"Green\") return Color::Green;\n        if (s == \"Blue\")  return Color::Blue;\n        throw std::invalid_argument(\"Invalid color string\");\n    }\n};<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u7bc4\u56f2\u30c1\u30a7\u30c3\u30af\u3068\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3<\/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=\"\">enum class Month : uint8_t {\n    January = 1,\n    February,\n    March,\n    \/\/ ...\n    December = 12\n};\n\nclass MonthValidator {\npublic:\n    static bool isValid(uint8_t value) {\n        return value &gt;= static_cast&lt;uint8_t&gt;(Month::January) &amp;&amp;\n               value &lt;= static_cast&lt;uint8_t&gt;(Month::December);\n    }\n\n    static Month fromInt(int value) {\n        if (!isValid(static_cast&lt;uint8_t&gt;(value))) {\n            throw std::out_of_range(\"Invalid month value\");\n        }\n        return static_cast&lt;Month&gt;(value);\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">\u30d0\u30c3\u30af\u30ef\u30fc\u30c9\u4e92\u63db\u6027\u306e\u78ba\u4fdd<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u65e2\u5b58\u30b3\u30fc\u30c9\u3068\u306e\u4e92\u63db\u6027\u7dad\u6301<\/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=\"\">\/\/ \u5f93\u6765\u306eenum\nenum OldStatus {\n    OLD_STATUS_OK,\n    OLD_STATUS_ERROR\n};\n\n\/\/ \u65b0\u3057\u3044enum class\nenum class NewStatus {\n    OK,\n    Error\n};\n\n\/\/ \u4e92\u63db\u6027\u30ec\u30a4\u30e4\u30fc\u306e\u5b9f\u88c5\nclass StatusCompatibility {\npublic:\n    static OldStatus toOldStatus(NewStatus status) {\n        switch (status) {\n            case NewStatus::OK:    return OLD_STATUS_OK;\n            case NewStatus::Error: return OLD_STATUS_ERROR;\n        }\n        throw std::invalid_argument(\"Invalid status\");\n    }\n\n    static NewStatus toNewStatus(OldStatus status) {\n        switch (status) {\n            case OLD_STATUS_OK:    return NewStatus::OK;\n            case OLD_STATUS_ERROR: return NewStatus::Error;\n        }\n        throw std::invalid_argument(\"Invalid old status\");\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30d0\u30fc\u30b8\u30e7\u30f3\u7ba1\u7406\u3068\u79fb\u884c\u6226\u7565<\/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=\"\">namespace v1 {\n    enum class ApiStatus {\n        OK,\n        Error\n    };\n}\n\nnamespace v2 {\n    enum class ApiStatus {\n        OK,\n        Error,\n        Pending  \/\/ \u65b0\u3057\u3044\u5024\u306e\u8ffd\u52a0\n    };\n\n    \/\/ \u5909\u63db\u95a2\u6570\u306e\u63d0\u4f9b\n    static ApiStatus fromV1(v1::ApiStatus oldStatus) {\n        switch (oldStatus) {\n            case v1::ApiStatus::OK:    return ApiStatus::OK;\n            case v1::ApiStatus::Error: return ApiStatus::Error;\n        }\n        throw std::invalid_argument(\"Invalid v1 status\");\n    }\n}<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u5b89\u5168\u306a\u62e1\u5f35\u65b9\u6cd5<\/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=\"\">\/\/ \u5c06\u6765\u306e\u62e1\u5f35\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08\nenum class ExtensibleStatus : uint32_t {  \/\/ \u5341\u5206\u306a\u4f59\u5730\u3092\u6301\u3064\u578b\u3092\u4f7f\u7528\n    OK = 0,\n    Error = 1,\n    \/\/ \u4e88\u7d04\u6e08\u307f\u7bc4\u56f2\n    Reserved_Start = 1000,\n    Reserved_End = 2000,\n    \/\/ \u30ab\u30b9\u30bf\u30e0\u62e1\u5f35\u7528\u306e\u7bc4\u56f2\n    Custom_Start = 10000,\n    Custom_End = 20000\n};\n\nclass StatusExtensionManager {\npublic:\n    static bool isReserved(ExtensibleStatus status) {\n        auto value = static_cast&lt;uint32_t&gt;(status);\n        return value &gt;= static_cast&lt;uint32_t&gt;(ExtensibleStatus::Reserved_Start) &amp;&amp;\n               value &lt;= static_cast&lt;uint32_t&gt;(ExtensibleStatus::Reserved_End);\n    }\n\n    static bool isCustom(ExtensibleStatus status) {\n        auto value = static_cast&lt;uint32_t&gt;(status);\n        return value &gt;= static_cast&lt;uint32_t&gt;(ExtensibleStatus::Custom_Start) &amp;&amp;\n               value &lt;= static_cast&lt;uint32_t&gt;(ExtensibleStatus::Custom_End);\n    }\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u6ce8\u610f\u70b9\u3068\u5bfe\u51e6\u6cd5\u3092\u7406\u89e3\u3057\u3001\u9069\u5207\u306b\u5b9f\u88c5\u3059\u308b\u3053\u3068\u3067\u3001enum class\u3092\u5b89\u5168\u304b\u3064\u52b9\u679c\u7684\u306b\u6d3b\u7528\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u30ec\u30ac\u30b7\u30fc\u30b7\u30b9\u30c6\u30e0\u3068\u306e\u7d71\u5408\u3084\u9577\u671f\u7684\u306a\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u304c\u5fc5\u8981\u306a\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u8003\u616e\u70b9\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-19\">enum \u30af\u30e9\u30b9\u306e\u5b9f\u52d9\u3067\u306e\u5fdc\u7528\u4f8b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-20\">\u5927\u898f\u6a21\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u6d3b\u7528\u4f8b<\/h3>\n\n\n\n<p>\u5b9f\u969b\u306e\u958b\u767a\u73fe\u5834\u3067\u306eenum class\u306e\u52b9\u679c\u7684\u306a\u6d3b\u7528\u4f8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30de\u30a4\u30af\u30ed\u30b5\u30fc\u30d3\u30b9\u3067\u306e\u30b9\u30c6\u30fc\u30bf\u30b9\u7ba1\u7406<\/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=\"\">namespace ServiceStatus {\n    enum class Health {\n        Healthy,\n        Degraded,\n        Unhealthy,\n        Unknown\n    };\n\n    enum class Availability {\n        Active,\n        MaintenanceMode,\n        Suspended,\n        Offline\n    };\n\n    class ServiceStateManager {\n    private:\n        Health health{Health::Unknown};\n        Availability availability{Availability::Offline};\n        std::mutex stateMutex;\n\n    public:\n        void updateHealth(Health newHealth) {\n            std::lock_guard&lt;std::mutex&gt; lock(stateMutex);\n            health = newHealth;\n            notifyStateChange();\n        }\n\n        void setAvailability(Availability newAvailability) {\n            std::lock_guard&lt;std::mutex&gt; lock(stateMutex);\n            availability = newAvailability;\n            notifyStateChange();\n        }\n\n        \/\/ \u30d8\u30eb\u30b9\u30c1\u30a7\u30c3\u30af\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u7528\u306eJSON\u30ec\u30b9\u30dd\u30f3\u30b9\u751f\u6210\n        std::string getHealthCheckResponse() const {\n            std::lock_guard&lt;std::mutex&gt; lock(stateMutex);\n            return formatHealthResponse(health, availability);\n        }\n    };\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u5927\u898f\u6a21\u30b2\u30fc\u30e0\u30a8\u30f3\u30b8\u30f3\u3067\u306e\u30b9\u30c6\u30fc\u30c8\u7ba1\u7406<\/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=\"\">namespace GameEngine {\n    enum class EntityState {\n        Spawning,\n        Active,\n        Damaged,\n        Invulnerable,\n        Dying,\n        Dead\n    };\n\n    enum class AnimationPhase {\n        Idle,\n        Walking,\n        Running,\n        Jumping,\n        Falling,\n        Landing\n    };\n\n    class EntityManager {\n    private:\n        struct Entity {\n            EntityState state;\n            AnimationPhase animPhase;\n            float health;\n            \/\/ \u305d\u306e\u4ed6\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\n        };\n\n        std::unordered_map&lt;uint64_t, Entity&gt; entities;\n\n    public:\n        void updateEntityState(uint64_t entityId, EntityState newState) {\n            if (auto it = entities.find(entityId); it != entities.end()) {\n                auto&amp; entity = it-&gt;second;\n\n                \/\/ \u72b6\u614b\u9077\u79fb\u306e\u59a5\u5f53\u6027\u30c1\u30a7\u30c3\u30af\n                if (isValidStateTransition(entity.state, newState)) {\n                    entity.state = newState;\n                    onEntityStateChanged(entityId, newState);\n                }\n            }\n        }\n\n    private:\n        bool isValidStateTransition(EntityState current, EntityState next) {\n            \/\/ \u72b6\u614b\u9077\u79fb\u306e\u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\n            static const std::unordered_map&lt;EntityState, std::set&lt;EntityState&gt;&gt; validTransitions = {\n                {EntityState::Spawning, {EntityState::Active}},\n                {EntityState::Active, {EntityState::Damaged, EntityState::Invulnerable, EntityState::Dying}},\n                {EntityState::Damaged, {EntityState::Active, EntityState::Dying}},\n                {EntityState::Invulnerable, {EntityState::Active}},\n                {EntityState::Dying, {EntityState::Dead}},\n                {EntityState::Dead, {}}\n            };\n\n            auto it = validTransitions.find(current);\n            return it != validTransitions.end() &amp;&amp; it-&gt;second.contains(next);\n        }\n    };\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-21\">\u4fdd\u5b88\u6027\u5411\u4e0a\u306e\u305f\u3081\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8a2d\u5b9a\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u6d3b\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=\"\">class ConfigurationManager {\npublic:\n    enum class ConfigSource {\n        Default,\n        Environment,\n        File,\n        CommandLine,\n        Remote\n    };\n\n    enum class ValidationLevel {\n        None,\n        Basic,\n        Strict\n    };\n\nprivate:\n    struct ConfigEntry {\n        std::string value;\n        ConfigSource source;\n        std::chrono::system_clock::time_point lastUpdate;\n    };\n\n    std::unordered_map&lt;std::string, ConfigEntry&gt; configurations;\n    ValidationLevel validationLevel{ValidationLevel::Basic};\n\npublic:\n    template&lt;typename T&gt;\n    std::optional&lt;T&gt; getValue(const std::string&amp; key) const {\n        if (auto it = configurations.find(key); it != configurations.end()) {\n            return parseValue&lt;T&gt;(it-&gt;second.value);\n        }\n        return std::nullopt;\n    }\n\n    bool setValue(const std::string&amp; key, \n                 const std::string&amp; value, \n                 ConfigSource source) {\n        if (!validateValue(key, value)) {\n            return false;\n        }\n\n        configurations[key] = ConfigEntry{\n            value,\n            source,\n            std::chrono::system_clock::now()\n        };\n\n        notifyConfigurationChanged(key);\n        return true;\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0<\/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=\"\">namespace ErrorHandling {\n    enum class Severity {\n        Info,\n        Warning,\n        Error,\n        Critical,\n        Fatal\n    };\n\n    enum class ErrorCategory {\n        Network,\n        Database,\n        Security,\n        BusinessLogic,\n        System\n    };\n\n    class ErrorLogger {\n    private:\n        struct ErrorContext {\n            Severity severity;\n            ErrorCategory category;\n            std::string message;\n            std::source_location location;\n            std::chrono::system_clock::time_point timestamp;\n        };\n\n        std::deque&lt;ErrorContext&gt; errorLog;\n        std::mutex logMutex;\n\n    public:\n        void logError(Severity severity,\n                     ErrorCategory category,\n                     const std::string&amp; message,\n                     const std::source_location&amp; location = \n                         std::source_location::current()) {\n            std::lock_guard&lt;std::mutex&gt; lock(logMutex);\n\n            errorLog.push_back({\n                severity,\n                category,\n                message,\n                location,\n                std::chrono::system_clock::now()\n            });\n\n            if (severity &gt;= Severity::Critical) {\n                notifyAdministrators();\n            }\n\n            \/\/ \u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\n            while (errorLog.size() &gt; maxLogSize) {\n                errorLog.pop_front();\n            }\n        }\n    };\n}<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u88c5\u30d1\u30bf\u30fc\u30f3\u306f\u3001\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u691c\u8a3c\u3055\u308c\u305f\u52b9\u679c\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u3059\u3002\u7279\u306b\u4ee5\u4e0b\u306e\u70b9\u3067\u512a\u308c\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u578b\u5b89\u5168\u6027\u306e\u78ba\u4fdd<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a<\/li>\n\n\n\n<li>\u4fdd\u5b88\u6027\u306e\u5411\u4e0a<\/li>\n\n\n\n<li>\u30c7\u30d0\u30c3\u30b0\u306e\u3057\u3084\u3059\u3055<\/li>\n\n\n\n<li>\u30c1\u30fc\u30e0\u958b\u767a\u3067\u306e\u6574\u5408\u6027\u7dad\u6301<\/li>\n<\/ul>\n\n\n\n<p>\u5b9f\u52d9\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u57fa\u790e\u3068\u3057\u3066\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3057\u3066\u3044\u304f\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-2165","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\/2165","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=2165"}],"version-history":[{"count":1,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2165\/revisions"}],"predecessor-version":[{"id":2166,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=\/wp\/v2\/posts\/2165\/revisions\/2166"}],"wp:attachment":[{"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2165"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2165"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dexall.co.jp\/articles\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}