{"id":2169,"date":"2025-03-24T08:48:07","date_gmt":"2025-03-23T23:48:07","guid":{"rendered":"https:\/\/dexall.co.jp\/articles\/?p=2169"},"modified":"2025-03-24T08:48:32","modified_gmt":"2025-03-23T23:48:32","slug":"c%e3%81%ae%e4%be%8b%e5%a4%96%e5%87%a6%e7%90%86%e5%ae%8c%e5%85%a8%e3%82%ac%e3%82%a4%e3%83%89%ef%bc%9a-%e5%8a%b9%e7%8e%87%e7%9a%84%e3%81%aa%e5%ae%9f%e7%8f%be%e3%81%8b%e3%82%89%e7%8f%be%e5%a0%b4","status":"publish","type":"post","link":"https:\/\/dexall.co.jp\/articles\/?p=2169","title":{"rendered":"C++\u306e\u4f8b\u5916\u51e6\u7406\u5b8c\u5168\u30ac\u30a4\u30c9\uff1a \u52b9\u7387\u7684\u306a\u5b9f\u73fe\u304b\u3089\u73fe\u5834\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u307e\u3067"},"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++\u306b\u304a\u3051\u308b\u4f8b\u5916\u51e6\u7406\u306e\u57fa\u790e\u77e5\u8b58<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-1\">\u4f8b\u5916\u51e6\u7406\u304c\u5fc5\u8981\u3068\u306a\u308b\u80cc\u666f\u306e\u91cd\u8981\u6027<\/a>      <\/li>      <li>        <a href=\"#i-2\">\u4f8b\u5916\u51e6\u7406\u306e\u4ed5\u7d44\u307f\u3068\u52d5\u4f5c\u306e\u4ed5\u7d44\u307f<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-3\">\u57fa\u672c\u7684\u306a\u69cb\u6587\u3068\u4f7f\u7528\u65b9\u6cd5<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-4\">\u52b9\u7387\u7684\u306a\u4f8b\u5916\u51e6\u7406\u306e\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-5\">\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u9069\u5207\u306a\u8a2d\u8a08\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-6\">\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u3068RAII\u30d1\u30bf\u30fc\u30f3\u306e\u6d3b\u7528<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-7\">\u4f8b\u5916\u5b89\u5168\u6027\u306e\u78ba\u4fdd\u3068\u305d\u306e\u91cd\u8981\u6027<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-8\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u4f8b\u5916\u51e6\u7406<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-9\">\u4f8b\u5916\u51e6\u7406\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3068\u305d\u306e\u5f71\u97ff<\/a>      <\/li>      <li>        <a href=\"#i-10\">\u30bc\u30ed\u30b3\u30b9\u30c8\u4f8b\u5916\u51e6\u7406\u306e\u5b9f\u73fe\u65b9\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-11\">\u4f8b\u5916\u3092\u4f7f\u308f\u306a\u3044\u4ee3\u66ff\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u691c\u8a0e<\/a>      <\/li>    <\/ul>  <\/li>  <li>    <a href=\"#i-12\">\u73fe\u5834\u3067\u6d3b\u304b\u305b\u308b\u4f8b\u5916\u51e6\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-13\">\u9069\u5207\u306a\u4f8b\u5916\u7c92\u5ea6\u306e\u6c7a\u5b9a\u65b9\u6cd5<\/a>      <\/li>      <li>        <a href=\"#i-14\">\u4f8b\u5916\u51e6\u7406\u306e\u30c6\u30b9\u30c8\u624b\u6cd5\u3068\u6ce8\u610f\u70b9<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-15\">\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u6d3b\u7528\u4e8b\u4f8b<\/a>      <\/li>    <\/ul>  <\/li>  <li class=\"last\">    <a href=\"#i-16\">\u30e2\u30c0\u30f3C++\u306b\u304a\u3051\u308b\u4f8b\u5916\u51e6\u7406\u306e\u9032\u5316<\/a>    <ul class=\"menu_level_1\">      <li class=\"first\">        <a href=\"#i-17\">C++17\u4ee5\u964d\u3067\u306e\u4f8b\u5916\u51e6\u7406\u306e\u6539\u5584\u70b9<\/a>      <\/li>      <li>        <a href=\"#i-18\">noexcept\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u6cd5<\/a>      <\/li>      <li class=\"last\">        <a href=\"#i-19\">\u5c06\u6765\u306e\u5c55\u671b\u3068\u6ce8\u76ee\u3059\u3079\u304d\u52d5\u5411<\/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++\u306b\u304a\u3051\u308b\u4f8b\u5916\u51e6\u7406\u306e\u57fa\u790e\u77e5\u8b58<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-1\">\u4f8b\u5916\u51e6\u7406\u304c\u5fc5\u8981\u3068\u306a\u308b\u80cc\u666f\u306e\u91cd\u8981\u6027<\/h3>\n\n\n\n<p>\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u306b\u304a\u3044\u3066\u3001\u30a8\u30e9\u30fc\u51e6\u7406\u306f\u907f\u3051\u3066\u901a\u308c\u306a\u3044\u91cd\u8981\u306a\u8ab2\u984c\u3067\u3059\u3002\u7279\u306b\u5927\u898f\u6a21\u306aC++\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u72b6\u6cc1\u3067\u9069\u5207\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u304c\u5fc5\u8981\u4e0d\u53ef\u6b20\u3068\u306a\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e1\u30e2\u30ea\u5272\u308a\u5f53\u3066\u306e\u5931\u6557<\/li>\n\n\n\n<li>\u30d5\u30a1\u30a4\u30eb\u64cd\u4f5c\u306e\u30a8\u30e9\u30fc<\/li>\n\n\n\n<li>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u901a\u4fe1\u306e\u969c\u5bb3<\/li>\n\n\n\n<li>\u4e0d\u6b63\u306a\u5165\u529b\u5024\u306e\u691c\u51fa<\/li>\n\n\n\n<li>\u30ea\u30bd\u30fc\u30b9\u306e\u7af6\u5408\u72b6\u614b<\/li>\n<\/ul>\n\n\n\n<p>\u5f93\u6765\u306e\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u306b\u3088\u308b\u51e6\u7406\u3068\u6bd4\u8f03\u3057\u3066\u3001\u4f8b\u5916\u51e6\u7406\u306b\u306f\u6b21\u306e\u3088\u3046\u306a\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u51e6\u7406\u3068\u30e1\u30a4\u30f3\u51e6\u7406\u306e\u5206\u96e2<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u3092\u898b\u843d\u3068\u3059\u30ea\u30b9\u30af\u306e\u4f4e\u6e1b<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u767a\u751f\u7b87\u6240\u304b\u3089\u547c\u3073\u51fa\u3057\u5143\u3078\u306e\u78ba\u5b9f\u306a\u901a\u77e5<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u60c5\u5831\u306e\u8a73\u7d30\u306a\u4f1d\u9054\u304c\u53ef\u80fd<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-2\">\u4f8b\u5916\u51e6\u7406\u306e\u4ed5\u7d44\u307f\u3068\u52d5\u4f5c\u306e\u4ed5\u7d44\u307f<\/h3>\n\n\n\n<p>C++\u306e\u4f8b\u5916\u51e6\u7406\u306f\u3001\u300c\u30b9\u30bf\u30c3\u30af\u5dfb\u304d\u623b\u3057\uff08Stack Unwinding\uff09\u300d\u3068\u3044\u3046\u30e1\u30ab\u30cb\u30ba\u30e0\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u3068\u3001\u6b21\u306e\u3088\u3046\u306a\u6d41\u308c\u3067\u51e6\u7406\u304c\u884c\u308f\u308c\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4f8b\u5916\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u751f\u6210<\/li>\n\n\n\n<li>\u30b9\u30bf\u30c3\u30af\u30d5\u30ec\u30fc\u30e0\u306e\u5dfb\u304d\u623b\u3057\u958b\u59cb<\/li>\n\n\n\n<li>\u9069\u5207\u306acatch\u30d6\u30ed\u30c3\u30af\u306e\u691c\u7d22<\/li>\n\n\n\n<li>\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u547c\u3073\u51fa\u3057\uff08\u30ea\u30bd\u30fc\u30b9\u306e\u89e3\u653e\uff09<\/li>\n\n\n\n<li>\u5236\u5fa1\u306e\u79fb\u7ba1\u3068\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u5b9f\u884c<\/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=\"\">\/\/ \u4f8b\u5916\u51e6\u7406\u306e\u57fa\u672c\u7684\u306a\u6d41\u308c\u3092\u793a\u3059\u30b3\u30fc\u30c9\u4f8b\n#include &lt;iostream&gt;\n#include &lt;stdexcept&gt;\n\nclass Resource {\npublic:\n    Resource() { std::cout &lt;&lt; \"\u30ea\u30bd\u30fc\u30b9\u3092\u78ba\u4fdd\u3057\u307e\u3057\u305f\\n\"; }\n    ~Resource() { std::cout &lt;&lt; \"\u30ea\u30bd\u30fc\u30b9\u3092\u89e3\u653e\u3057\u307e\u3057\u305f\\n\"; }\n};\n\nvoid riskyOperation() {\n    Resource r;  \/\/ \u30ea\u30bd\u30fc\u30b9\u3092\u78ba\u4fdd\n    throw std::runtime_error(\"\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\");\n    \/\/ \u3053\u306e\u884c\u306f\u5b9f\u884c\u3055\u308c\u307e\u305b\u3093\n}\n\nint main() {\n    try {\n        riskyOperation();\n    }\n    catch (const std::exception&amp; e) {\n        std::cout &lt;&lt; \"\u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n    }\n    return 0;\n}<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-3\">\u57fa\u672c\u7684\u306a\u69cb\u6587\u3068\u4f7f\u7528\u65b9\u6cd5<\/h3>\n\n\n\n<p>C++\u306e\u4f8b\u5916\u51e6\u7406\u3067\u306f\u3001\u4ee5\u4e0b\u306e3\u3064\u306e\u30ad\u30fc\u30ef\u30fc\u30c9\u304c\u4e2d\u5fc3\u7684\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>try<\/code>: \u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u30b3\u30fc\u30c9\u30d6\u30ed\u30c3\u30af\u3092\u56f2\u3080<\/li>\n\n\n\n<li><code>throw<\/code>: \u4f8b\u5916\u3092\u6295\u3052\u308b\uff08\u767a\u751f\u3055\u305b\u308b\uff09<\/li>\n\n\n\n<li><code>catch<\/code>: \u767a\u751f\u3057\u305f\u4f8b\u5916\u3092\u6355\u6349\u3057\u3066\u51e6\u7406\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u5916\u51e6\u7406\u306e\u57fa\u672c\u7684\u306a\u30d1\u30bf\u30fc\u30f3\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\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;iostream&gt;\n#include &lt;stdexcept&gt;\n#include &lt;string&gt;\n\n\/\/ \u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u5b9a\u7fa9\nclass DatabaseException : public std::runtime_error {\npublic:\n    DatabaseException(const std::string&amp; message)\n        : std::runtime_error(message) {}\n};\n\n\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3092\u6a21\u3057\u305f\u30af\u30e9\u30b9\nclass Database {\npublic:\n    void connect(const std::string&amp; connectionString) {\n        if (connectionString.empty()) {\n            throw DatabaseException(\"\u63a5\u7d9a\u6587\u5b57\u5217\u304c\u7a7a\u3067\u3059\");\n        }\n        \/\/ \u63a5\u7d9a\u51e6\u7406...\n    }\n\n    void query(const std::string&amp; sql) {\n        if (sql.empty()) {\n            throw DatabaseException(\"SQL\u30af\u30a8\u30ea\u304c\u7a7a\u3067\u3059\");\n        }\n        \/\/ \u30af\u30a8\u30ea\u5b9f\u884c\u51e6\u7406...\n    }\n};\n\nint main() {\n    Database db;\n\n    try {\n        \/\/ \u6b63\u5e38\u7cfb\u306e\u51e6\u7406\n        db.connect(\"server=localhost;database=test\");\n        db.query(\"SELECT * FROM users\");\n    }\n    catch (const DatabaseException&amp; e) {\n        \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u56fa\u6709\u306e\u30a8\u30e9\u30fc\u51e6\u7406\n        std::cerr &lt;&lt; \"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30e9\u30fc: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n    }\n    catch (const std::exception&amp; e) {\n        \/\/ \u305d\u306e\u4ed6\u306e\u6a19\u6e96\u4f8b\u5916\u306e\u51e6\u7406\n        std::cerr &lt;&lt; \"\u305d\u306e\u4ed6\u306e\u30a8\u30e9\u30fc: \" &lt;&lt; e.what() &lt;&lt; std::endl;\n    }\n    catch (...) {\n        \/\/ \u672a\u77e5\u306e\u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1\n        std::cerr &lt;&lt; \"\u672a\u77e5\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\" &lt;&lt; std::endl;\n    }\n\n    return 0;\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u4f8b\u5916\u51e6\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u793a\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5177\u4f53\u7684\u306a\u4f8b\u5916\u304b\u3089\u9806\u306b\u30ad\u30e3\u30c3\u30c1\u3059\u308b<\/li>\n\n\n\n<li>\u6a19\u6e96\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u305f\u30ab\u30b9\u30bf\u30e0\u4f8b\u5916\u306e\u4f7f\u7528<\/li>\n\n\n\n<li>\u4f8b\u5916\u306e\u968e\u5c64\u69cb\u9020\u3092\u6d3b\u7528\u3057\u305f\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0<\/li>\n\n\n\n<li>const\u53c2\u7167\u306b\u3088\u308b\u4f8b\u5916\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u53d7\u3051\u53d6\u308a<\/li>\n<\/ol>\n\n\n\n<p>\u5b9f\u969b\u306e\u958b\u767a\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u57fa\u672c\u3092\u8e0f\u307e\u3048\u305f\u4e0a\u3067\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u9069\u5207\u306a\u4f8b\u5916\u51e6\u7406\u6226\u7565\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-4\">\u52b9\u7387\u7684\u306a\u4f8b\u5916\u51e6\u7406\u306e\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-5\">\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u9069\u5207\u306a\u8a2d\u8a08\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u52b9\u7387\u7684\u306a\u4f8b\u5916\u51e6\u7406\u306e\u7b2c\u4e00\u6b69\u306f\u3001\u9069\u5207\u306a\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u8a2d\u8a08\u3067\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u5b9f\u8df5\u7684\u306a\u4f8b\u5916\u30af\u30e9\u30b9\u8a2d\u8a08\u306e\u30dd\u30a4\u30f3\u30c8\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;stdexcept&gt;\n#include &lt;string&gt;\n#include &lt;sstream&gt;\n\n\/\/ \u57fa\u5e95\u3068\u306a\u308b\u4f8b\u5916\u30af\u30e9\u30b9\nclass ApplicationException : public std::runtime_error {\nprotected:\n    int errorCode_;\n    std::string details_;\n\npublic:\n    ApplicationException(const std::string&amp; message, int errorCode, const std::string&amp; details)\n        : std::runtime_error(message)\n        , errorCode_(errorCode)\n        , details_(details) {}\n\n    int getErrorCode() const { return errorCode_; }\n    const std::string&amp; getDetails() const { return details_; }\n\n    \/\/ \u30a8\u30e9\u30fc\u60c5\u5831\u3092\u6587\u5b57\u5217\u3068\u3057\u3066\u53d6\u5f97\n    std::string getFullMessage() const {\n        std::ostringstream oss;\n        oss &lt;&lt; \"Error \" &lt;&lt; errorCode_ &lt;&lt; \": \" &lt;&lt; what();\n        if (!details_.empty()) {\n            oss &lt;&lt; \"\\nDetails: \" &lt;&lt; details_;\n        }\n        return oss.str();\n    }\n};\n\n\/\/ \u5177\u4f53\u7684\u306a\u4f8b\u5916\u30af\u30e9\u30b9\nclass DatabaseException : public ApplicationException {\npublic:\n    enum ErrorCodes {\n        CONNECTION_ERROR = 1001,\n        QUERY_ERROR = 1002,\n        TRANSACTION_ERROR = 1003\n    };\n\n    DatabaseException(ErrorCodes code, const std::string&amp; details)\n        : ApplicationException(getMessageForCode(code), code, details) {}\n\nprivate:\n    static std::string getMessageForCode(ErrorCodes code) {\n        switch (code) {\n            case CONNECTION_ERROR: return \"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u30a8\u30e9\u30fc\";\n            case QUERY_ERROR: return \"\u30af\u30a8\u30ea\u5b9f\u884c\u30a8\u30e9\u30fc\";\n            case TRANSACTION_ERROR: return \"\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\";\n            default: return \"\u4e0d\u660e\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30e9\u30fc\";\n        }\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-6\">\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u3068RAII\u30d1\u30bf\u30fc\u30f3\u306e\u6d3b\u7528<\/h3>\n\n\n\n<p>RAII\u30d1\u30bf\u30fc\u30f3\uff08Resource Acquisition Is Initialization\uff09\u306f\u3001C++\u3067\u306e\u4f8b\u5916\u5b89\u5168\u306a\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u57fa\u672c\u3068\u306a\u308b\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;memory&gt;\n#include &lt;mutex&gt;\n\n\/\/ RAII\u30d1\u30bf\u30fc\u30f3\u3092\u6d3b\u7528\u3057\u305f\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306e\u4f8b\nclass DatabaseConnection {\nprivate:\n    struct ConnectionHandle {\n        \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u63a5\u7d9a\u3092\u8868\u3059\u30cf\u30f3\u30c9\u30eb\n        void* handle;\n        ConnectionHandle() : handle(nullptr) {}\n        ~ConnectionHandle() {\n            if (handle) {\n                \/\/ \u63a5\u7d9a\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\n                cleanup();\n            }\n        }\n    private:\n        void cleanup() {\n            \/\/ \u5b9f\u969b\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u51e6\u7406\n        }\n    };\n\n    std::unique_ptr&lt;ConnectionHandle&gt; connection_;\n    std::mutex mutex_;\n\npublic:\n    class Transaction {\n    private:\n        DatabaseConnection&amp; db_;\n        bool committed_;\n\n    public:\n        explicit Transaction(DatabaseConnection&amp; db) \n            : db_(db), committed_(false) {\n            \/\/ \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u958b\u59cb\n        }\n\n        ~Transaction() {\n            if (!committed_) {\n                \/\/ \u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\n                try {\n                    rollback();\n                } catch (...) {\n                    \/\/ \u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u5185\u3067\u306e\u4f8b\u5916\u306f\u7981\u6b62\n                }\n            }\n        }\n\n        void commit() {\n            \/\/ \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u30b3\u30df\u30c3\u30c8\n            committed_ = true;\n        }\n\n        void rollback() {\n            \/\/ \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\n            committed_ = false;\n        }\n    };\n\n    void executeQuery(const std::string&amp; sql) {\n        std::lock_guard&lt;std::mutex&gt; lock(mutex_);  \/\/ RAII\u306b\u3088\u308b\u30ed\u30c3\u30af\u7ba1\u7406\n        \/\/ \u30af\u30a8\u30ea\u5b9f\u884c\u51e6\u7406\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-7\">\u4f8b\u5916\u5b89\u5168\u6027\u306e\u78ba\u4fdd\u3068\u305d\u306e\u91cd\u8981\u6027<\/h3>\n\n\n\n<p>C++\u3067\u306f\u3001\u4f8b\u5916\u5b89\u5168\u6027\u3092\u4ee5\u4e0b\u306e3\u3064\u306e\u30ec\u30d9\u30eb\u3067\u5b9a\u7fa9\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u57fa\u672c\u4fdd\u8a3c\uff08Basic Guarantee\uff09<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f8b\u5916\u767a\u751f\u6642\u306b\u30ea\u30bd\u30fc\u30b9\u30ea\u30fc\u30af\u304c\u306a\u3044<\/li>\n\n\n\n<li>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u6709\u52b9\u306a\u72b6\u614b\u3092\u4fdd\u6301<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5f37\u3044\u4fdd\u8a3c\uff08Strong Guarantee\uff09<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51e6\u7406\u304c\u6210\u529f\u3059\u308b\u304b\u3001\u5143\u306e\u72b6\u614b\u306b\u623b\u308b\u304b<\/li>\n\n\n\n<li>\u300cAll or Nothing\u300d\u306e\u539f\u5247<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7121\u4f8b\u5916\u4fdd\u8a3c\uff08No-throw Guarantee\uff09<\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f8b\u5916\u3092\u6295\u3052\u306a\u3044<\/li>\n\n\n\n<li>\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306a\u3069\u3067\u91cd\u8981<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0b\u306b\u3001\u4f8b\u5916\u5b89\u5168\u6027\u306e\u5404\u30ec\u30d9\u30eb\u3092\u5b9f\u88c5\u3059\u308b\u4f8b\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=\"\">class DataProcessor {\nprivate:\n    std::vector&lt;int&gt; data_;\n    std::mutex mutex_;\n\npublic:\n    \/\/ \u57fa\u672c\u4fdd\u8a3c\u306e\u4f8b\n    void addData(const std::vector&lt;int&gt;&amp; newData) {\n        std::lock_guard&lt;std::mutex&gt; lock(mutex_);\n        \/\/ \u30c7\u30fc\u30bf\u306e\u8ffd\u52a0\uff08\u4f8b\u5916\u304c\u767a\u751f\u3057\u3066\u3082\u30e1\u30e2\u30ea\u30ea\u30fc\u30af\u306f\u3057\u306a\u3044\uff09\n        data_.insert(data_.end(), newData.begin(), newData.end());\n    }\n\n    \/\/ \u5f37\u3044\u4fdd\u8a3c\u306e\u4f8b\n    void updateData(size_t index, int newValue) {\n        std::lock_guard&lt;std::mutex&gt; lock(mutex_);\n        if (index &gt;= data_.size()) {\n            throw std::out_of_range(\"\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304c\u7bc4\u56f2\u5916\u3067\u3059\");\n        }\n        \/\/ \u5143\u306e\u5024\u3092\u4fdd\u5b58\n        int oldValue = data_[index];\n        try {\n            \/\/ \u66f4\u65b0\u51e6\u7406\uff08\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\uff09\n            data_[index] = newValue;\n            \/\/ \u4ed6\u306e\u51e6\u7406...\n        }\n        catch (...) {\n            \/\/ \u5931\u6557\u3057\u305f\u5834\u5408\u306f\u5143\u306e\u5024\u306b\u623b\u3059\n            data_[index] = oldValue;\n            throw; \/\/ \u4f8b\u5916\u3092\u518d\u9001\n        }\n    }\n\n    \/\/ \u7121\u4f8b\u5916\u4fdd\u8a3c\u306e\u4f8b\n    bool tryUpdateData(size_t index, int newValue) noexcept {\n        std::lock_guard&lt;std::mutex&gt; lock(mutex_);\n        if (index &gt;= data_.size()) {\n            return false;\n        }\n        data_[index] = newValue;\n        return true;\n    }\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u5b9f\u8df5\u30c6\u30af\u30cb\u30c3\u30af\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u5805\u7262\u3067\u4fdd\u5b88\u6027\u306e\u9ad8\u3044\u4f8b\u5916\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002\u7279\u306b\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u3092\u6255\u3046\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ea\u30bd\u30fc\u30b9\u7ba1\u7406\u306b\u306f\u5fc5\u305aRAII\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u9069\u5207\u306a\u7c92\u5ea6\u3067\u4f8b\u5916\u30af\u30e9\u30b9\u3092\u8a2d\u8a08\u3059\u308b<\/li>\n\n\n\n<li>\u4f8b\u5916\u5b89\u5168\u6027\u306e\u30ec\u30d9\u30eb\u3092\u610f\u8b58\u3057\u305f\u5b9f\u88c5\u3092\u884c\u3046<\/li>\n\n\n\n<li>\u30b9\u30de\u30fc\u30c8\u30dd\u30a4\u30f3\u30bf\u3084STL\u30b3\u30f3\u30c6\u30ca\u3092\u6d3b\u7528\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-8\">\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u8003\u616e\u3057\u305f\u4f8b\u5916\u51e6\u7406<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-9\">\u4f8b\u5916\u51e6\u7406\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3068\u305d\u306e\u5f71\u97ff<\/h3>\n\n\n\n<p>\u4f8b\u5916\u51e6\u7406\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u5b58\u5728\u3057\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30b9\u30bf\u30c3\u30af\u5dfb\u304d\u623b\u3057\u306e\u30b3\u30b9\u30c8<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b9\u30bf\u30c3\u30af\u30d5\u30ec\u30fc\u30e0\u306e\u89e3\u653e<\/li>\n\n\n\n<li>\u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u547c\u3073\u51fa\u3057<\/li>\n\n\n\n<li>\u4f8b\u5916\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30b3\u30d4\u30fc<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4f8b\u5916\u30c6\u30fc\u30d6\u30eb\u306e\u4fdd\u6301<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u30c6\u30fc\u30d6\u30eb\u751f\u6210<\/li>\n\n\n\n<li>\u5b9f\u884c\u6642\u306e\u30e1\u30e2\u30ea\u4f7f\u7528<\/li>\n<\/ul>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u3001\u4f8b\u5916\u51e6\u7406\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u8a08\u6e2c\u3057\u3066\u307f\u307e\u3057\u3087\u3046\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;chrono&gt;\n#include &lt;iostream&gt;\n#include &lt;stdexcept&gt;\n#include &lt;string&gt;\n\nclass Performance {\npublic:\n    static void measureExceptionOverhead() {\n        const int iterations = 1000000;\n\n        \/\/ \u4f8b\u5916\u3092\u4f7f\u7528\u3059\u308b\u30b1\u30fc\u30b9\n        auto start = std::chrono::high_resolution_clock::now();\n        for (int i = 0; i &lt; iterations; ++i) {\n            try {\n                throwException();\n            }\n            catch (const std::exception&amp; e) {\n                \/\/ \u4f55\u3082\u3057\u306a\u3044\n            }\n        }\n        auto end = std::chrono::high_resolution_clock::now();\n        auto duration1 = std::chrono::duration_cast&lt;std::chrono::microseconds&gt;(end - start);\n\n        \/\/ \u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u30b1\u30fc\u30b9\n        start = std::chrono::high_resolution_clock::now();\n        for (int i = 0; i &lt; iterations; ++i) {\n            if (returnErrorCode() != 0) {\n                \/\/ \u4f55\u3082\u3057\u306a\u3044\n            }\n        }\n        end = std::chrono::high_resolution_clock::now();\n        auto duration2 = std::chrono::duration_cast&lt;std::chrono::microseconds&gt;(end - start);\n\n        std::cout &lt;&lt; \"\u4f8b\u5916\u51e6\u7406\u306e\u5b9f\u884c\u6642\u9593: \" &lt;&lt; duration1.count() &lt;&lt; \"\u03bcs\\n\";\n        std::cout &lt;&lt; \"\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u6642\u9593: \" &lt;&lt; duration2.count() &lt;&lt; \"\u03bcs\\n\";\n    }\n\nprivate:\n    static void throwException() {\n        throw std::runtime_error(\"\u30a8\u30e9\u30fc\u767a\u751f\");\n    }\n\n    static int returnErrorCode() {\n        return -1;\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-10\">\u30bc\u30ed\u30b3\u30b9\u30c8\u4f8b\u5916\u51e6\u7406\u306e\u5b9f\u73fe\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u30bc\u30ed\u30b3\u30b9\u30c8\u4f8b\u5916\u51e6\u7406\u3068\u306f\u3001\u4f8b\u5916\u304c\u767a\u751f\u3057\u306a\u3044\u5834\u5408\u306b\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u30bc\u30ed\u3068\u306a\u308b\u5b9f\u88c5\u65b9\u6cd5\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u6280\u8853\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>noexcept\u306e\u9069\u5207\u306a\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 OptimizedResource {\npublic:\n    \/\/ \u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u6697\u9ed9\u7684\u306bnoexcept\n    ~OptimizedResource() {\n        cleanup();\n    }\n\n    \/\/ Move\u64cd\u4f5c\u3092noexcept\u306b\u3059\u308b\n    OptimizedResource(OptimizedResource&amp;&amp; other) noexcept\n        : resource_(other.resource_) {\n        other.resource_ = nullptr;\n    }\n\n    OptimizedResource&amp; operator=(OptimizedResource&amp;&amp; other) noexcept {\n        if (this != &amp;other) {\n            cleanup();\n            resource_ = other.resource_;\n            other.resource_ = nullptr;\n        }\n        return *this;\n    }\n\nprivate:\n    void* resource_ = nullptr;\n\n    void cleanup() noexcept {\n        if (resource_) {\n            \/\/ \u30ea\u30bd\u30fc\u30b9\u306e\u89e3\u653e\n            resource_ = nullptr;\n        }\n    }\n};<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u4f8b\u5916\u4ed5\u69d8\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=\"\">template&lt;typename T&gt;\nclass OptimizedVector {\npublic:\n    \/\/ \u5bb9\u91cf\u304c\u8db3\u308a\u3066\u3044\u308b\u5834\u5408\u306f\u4f8b\u5916\u3092\u6295\u3052\u306a\u3044\n    void push_back(const T&amp; value) noexcept(noexcept(T(value))) {\n        if (size_ &lt; capacity_) {\n            new (&amp;data_[size_]) T(value);\n            ++size_;\n        } else {\n            growAndPush(value);\n        }\n    }\n\nprivate:\n    T* data_ = nullptr;\n    size_t size_ = 0;\n    size_t capacity_ = 0;\n\n    \/\/ \u5bb9\u91cf\u62e1\u5f35\u6642\u306f\u4f8b\u5916\u3092\u6295\u3052\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\n    void growAndPush(const T&amp; value) {\n        size_t newCapacity = (capacity_ == 0) ? 1 : capacity_ * 2;\n        T* newData = new T[newCapacity];\n        try {\n            \/\/ \u65e2\u5b58\u8981\u7d20\u306e\u30e0\u30fc\u30d6\n            for (size_t i = 0; i &lt; size_; ++i) {\n                new (&amp;newData[i]) T(std::move(data_[i]));\n            }\n            \/\/ \u65b0\u3057\u3044\u8981\u7d20\u306e\u8ffd\u52a0\n            new (&amp;newData[size_]) T(value);\n        }\n        catch (...) {\n            delete[] newData;\n            throw;\n        }\n        delete[] data_;\n        data_ = newData;\n        capacity_ = newCapacity;\n        ++size_;\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-11\">\u4f8b\u5916\u3092\u4f7f\u308f\u306a\u3044\u4ee3\u66ff\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u691c\u8a0e<\/h3>\n\n\n\n<p>\u72b6\u6cc1\u306b\u3088\u3063\u3066\u306f\u3001\u4f8b\u5916\u51e6\u7406\u306e\u4ee3\u308f\u308a\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u4ee3\u66ff\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u6709\u52b9\u306a\u5834\u5408\u304c\u3042\u308a\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Expected\u578b\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=\"\">#include &lt;variant&gt;\n#include &lt;string&gt;\n\ntemplate&lt;typename T, typename E&gt;\nclass Expected {\n    std::variant&lt;T, E&gt; data_;\n    bool hasValue_;\n\npublic:\n    Expected(const T&amp; value) : data_(value), hasValue_(true) {}\n    Expected(const E&amp; error) : data_(error), hasValue_(false) {}\n\n    bool hasValue() const { return hasValue_; }\n    bool hasError() const { return !hasValue_; }\n\n    const T&amp; value() const {\n        if (!hasValue_) {\n            throw std::runtime_error(\"\u5024\u304c\u5b58\u5728\u3057\u307e\u305b\u3093\");\n        }\n        return std::get&lt;T&gt;(data_);\n    }\n\n    const E&amp; error() const {\n        if (hasValue_) {\n            throw std::runtime_error(\"\u30a8\u30e9\u30fc\u304c\u5b58\u5728\u3057\u307e\u305b\u3093\");\n        }\n        return std::get&lt;E&gt;(data_);\n    }\n};\n\n\/\/ \u4f7f\u7528\u4f8b\nExpected&lt;int, std::string&gt; divide(int a, int b) {\n    if (b == 0) {\n        return Expected&lt;int, std::string&gt;(\"\u30bc\u30ed\u9664\u7b97\u30a8\u30e9\u30fc\");\n    }\n    return Expected&lt;int, std::string&gt;(a \/ b);\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30aa\u30d7\u30b7\u30e7\u30ca\u30eb\u5024\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=\"\">#include &lt;optional&gt;\n\nclass DataProcessor {\npublic:\n    std::optional&lt;int&gt; processData(const std::string&amp; input) {\n        if (input.empty()) {\n            return std::nullopt;\n        }\n        try {\n            return std::stoi(input);\n        }\n        catch (...) {\n            return std::nullopt;\n        }\n    }\n};<\/pre>\n\n\n\n<p>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u306a\u90e8\u5206\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u9078\u629e\u57fa\u6e96\u306b\u57fa\u3065\u3044\u3066\u9069\u5207\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u9078\u629e\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30a8\u30e9\u30fc\u306e\u767a\u751f\u983b\u5ea6<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u8981\u4ef6\u306e\u53b3\u3057\u3055<\/li>\n\n\n\n<li>\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u60c5\u5831\u306e\u8a73\u7d30\u5ea6\u306e\u5fc5\u8981\u6027<\/li>\n<\/ul>\n\n\n\n<p>\u4f7f\u7528\u3059\u308b\u74b0\u5883\u3084\u8981\u4ef6\u306b\u5fdc\u3058\u3066\u3001\u3053\u308c\u3089\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3092\u9069\u5207\u306b\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u3067\u3001\u6700\u9069\u306a\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u5b9f\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-12\">\u73fe\u5834\u3067\u6d3b\u304b\u305b\u308b\u4f8b\u5916\u51e6\u7406\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-13\">\u9069\u5207\u306a\u4f8b\u5916\u7c92\u5ea6\u306e\u6c7a\u5b9a\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u4f8b\u5916\u51e6\u7406\u306e\u7c92\u5ea6\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u8981\u4ef6\u3084\u904b\u7528\u65b9\u91dd\u306b\u5927\u304d\u304f\u5f71\u97ff\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u5b9f\u8df5\u7684\u306a\u7c92\u5ea6\u6c7a\u5b9a\u306e\u6307\u91dd\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u4f8b\u5916\u306e\u968e\u5c64\u69cb\u9020\u306e\u4f8b\nclass SystemException : public std::runtime_error {\npublic:\n    explicit SystemException(const std::string&amp; message) \n        : std::runtime_error(message) {}\n};\n\n\/\/ \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u95a2\u9023\u306e\u4f8b\u5916\nclass NetworkException : public SystemException {\npublic:\n    explicit NetworkException(const std::string&amp; message)\n        : SystemException(message) {}\n};\n\n\/\/ \u3088\u308a\u5177\u4f53\u7684\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4f8b\u5916\nclass ConnectionTimeoutException : public NetworkException {\npublic:\n    explicit ConnectionTimeoutException(const std::string&amp; message)\n        : NetworkException(message) {}\n};\n\n\/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u95a2\u9023\u306e\u4f8b\u5916\nclass DatabaseException : public SystemException {\npublic:\n    explicit DatabaseException(const std::string&amp; message)\n        : SystemException(message) {}\n};\n\n\/\/ \u696d\u52d9\u30ed\u30b8\u30c3\u30af\u95a2\u9023\u306e\u4f8b\u5916\nclass BusinessException : public std::runtime_error {\npublic:\n    explicit BusinessException(const std::string&amp; message)\n        : std::runtime_error(message) {}\n};\n\n\/\/ \u5b9f\u969b\u306e\u4f7f\u7528\u4f8b\nclass OrderProcessor {\npublic:\n    void processOrder(const Order&amp; order) {\n        try {\n            validateOrder(order);\n            saveToDatabase(order);\n            notifyShippingDepartment(order);\n        }\n        catch (const DatabaseException&amp; e) {\n            \/\/ \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30e9\u30fc\u306e\u8a73\u7d30\u306a\u30ed\u30b0\u8a18\u9332\n            logError(\"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30e9\u30fc\", e);\n            throw; \/\/ \u4e0a\u4f4d\u5c64\u3067\u306e\u51e6\u7406\u306e\u305f\u3081\u306b\u518d\u30b9\u30ed\u30fc\n        }\n        catch (const NetworkException&amp; e) {\n            \/\/ \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30e9\u30fc\u306e\u51e6\u7406\n            logError(\"\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30e9\u30fc\", e);\n            \/\/ \u30ea\u30c8\u30e9\u30a4\u30ed\u30b8\u30c3\u30af\u306e\u5b9f\u88c5\n            retryOperation(order);\n        }\n        catch (const BusinessException&amp; e) {\n            \/\/ \u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u30a8\u30e9\u30fc\u306e\u51e6\u7406\n            logError(\"\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u30a8\u30e9\u30fc\", e);\n            notifyUser(e.what());\n        }\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-14\">\u4f8b\u5916\u51e6\u7406\u306e\u30c6\u30b9\u30c8\u624b\u6cd5\u3068\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>\u52b9\u679c\u7684\u306a\u4f8b\u5916\u51e6\u7406\u306e\u30c6\u30b9\u30c8\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u6709\u52b9\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;gtest\/gtest.h&gt;\n#include &lt;memory&gt;\n\n\/\/ \u30c6\u30b9\u30c8\u5bfe\u8c61\u306e\u30af\u30e9\u30b9\nclass BankAccount {\npublic:\n    BankAccount(double initialBalance) {\n        if (initialBalance &lt; 0) {\n            throw std::invalid_argument(\"\u521d\u671f\u6b8b\u9ad8\u306f0\u4ee5\u4e0a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\");\n        }\n        balance_ = initialBalance;\n    }\n\n    void withdraw(double amount) {\n        if (amount &lt;= 0) {\n            throw std::invalid_argument(\"\u5f15\u304d\u51fa\u3057\u984d\u306f\u6b63\u306e\u5024\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\");\n        }\n        if (amount &gt; balance_) {\n            throw std::runtime_error(\"\u6b8b\u9ad8\u4e0d\u8db3\u3067\u3059\");\n        }\n        balance_ -= amount;\n    }\n\nprivate:\n    double balance_;\n};\n\n\/\/ \u4f8b\u5916\u767a\u751f\u306e\u30c6\u30b9\u30c8\nTEST(BankAccountTest, ThrowsOnNegativeInitialBalance) {\n    EXPECT_THROW(BankAccount(-100), std::invalid_argument);\n}\n\n\/\/ \u4f8b\u5916\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30c6\u30b9\u30c8\nTEST(BankAccountTest, ThrowsWithCorrectMessage) {\n    try {\n        BankAccount account(-100);\n        FAIL() &lt;&lt; \"\u4f8b\u5916\u304c\u767a\u751f\u3057\u307e\u305b\u3093\u3067\u3057\u305f\";\n    }\n    catch (const std::invalid_argument&amp; e) {\n        EXPECT_STREQ(e.what(), \"\u521d\u671f\u6b8b\u9ad8\u306f0\u4ee5\u4e0a\u3067\u3042\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\");\n    }\n}\n\n\/\/ \u5883\u754c\u5024\u306e\u30c6\u30b9\u30c8\nclass DatabaseConnectionTest : public ::testing::Test {\nprotected:\n    void SetUp() override {\n        connection = std::make_unique&lt;DatabaseConnection&gt;();\n    }\n\n    std::unique_ptr&lt;DatabaseConnection&gt; connection;\n};\n\nTEST_F(DatabaseConnectionTest, HandlesConnectionFailure) {\n    \/\/ \u63a5\u7d9a\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u306e\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\n    connection-&gt;setTimeout(1);  \/\/ 1ms\n    EXPECT_THROW(connection-&gt;connect(\"slow.database.com\"), ConnectionTimeoutException);\n}<\/pre>\n\n\n\n<p>\u30c6\u30b9\u30c8\u6642\u306e\u4e3b\u306a\u6ce8\u610f\u70b9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7570\u5e38\u7cfb\u30c6\u30b9\u30c8\u306e\u7db2\u7f85\u6027\u78ba\u4fdd<\/li>\n\n\n\n<li>\u30ea\u30bd\u30fc\u30b9\u30ea\u30fc\u30af\u306e\u78ba\u8a8d<\/li>\n\n\n\n<li>\u4f8b\u5916\u306e\u4f1d\u642c\u7d4c\u8def\u306e\u691c\u8a3c<\/li>\n\n\n\n<li>\u5883\u754c\u5024\u6761\u4ef6\u306e\u30c6\u30b9\u30c8<\/li>\n\n\n\n<li>\u4e26\u884c\u51e6\u7406\u6642\u306e\u4f8b\u5916\u51e6\u7406\u306e\u691c\u8a3c<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-15\">\u5b9f\u969b\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u306e\u6d3b\u7528\u4e8b\u4f8b<\/h3>\n\n\n\n<p>\u5927\u898f\u6a21\u91d1\u878d\u30b7\u30b9\u30c6\u30e0\u3067\u306e\u4f8b\u5916\u51e6\u7406\u5b9f\u88c5\u4f8b\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=\"\">\/\/ \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u306e\u5b9f\u88c5\u4f8b\nclass TransactionManager {\npublic:\n    class TransactionScope {\n    public:\n        explicit TransactionScope(TransactionManager&amp; manager)\n            : manager_(manager), committed_(false) {\n            manager_.beginTransaction();\n        }\n\n        ~TransactionScope() {\n            if (!committed_) {\n                try {\n                    manager_.rollback();\n                }\n                catch (...) {\n                    \/\/ \u30c7\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u306e\u4f8b\u5916\u306f\u5371\u967a\u306a\u305f\u3081\u3001\u30ed\u30b0\u8a18\u9332\u306e\u307f\n                    LogManager::getInstance().logError(\"\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u306b\u5931\u6557\u3057\u307e\u3057\u305f\");\n                }\n            }\n        }\n\n        void commit() {\n            manager_.commit();\n            committed_ = true;\n        }\n\n    private:\n        TransactionManager&amp; manager_;\n        bool committed_;\n    };\n\n    \/\/ \u5b9f\u969b\u306e\u4f7f\u7528\u4f8b\n    void processPayment(const Payment&amp; payment) {\n        try {\n            TransactionScope transaction(*this);\n\n            \/\/ \u652f\u6255\u3044\u51e6\u7406\u306e\u5b9f\u884c\n            validatePayment(payment);\n            updateAccountBalance(payment);\n            createPaymentRecord(payment);\n\n            transaction.commit();\n        }\n        catch (const DatabaseException&amp; e) {\n            LogManager::getInstance().logError(\"\u652f\u6255\u3044\u51e6\u7406\u4e2d\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30e9\u30fc\u304c\u767a\u751f: \" + std::string(e.what()));\n            throw PaymentProcessingException(\"\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30e9\u30fc\u306b\u3088\u308a\u652f\u6255\u3044\u51e6\u7406\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", e);\n        }\n        catch (const std::exception&amp; e) {\n            LogManager::getInstance().logError(\"\u652f\u6255\u3044\u51e6\u7406\u4e2d\u306b\u4e88\u671f\u305b\u306c\u30a8\u30e9\u30fc\u304c\u767a\u751f: \" + std::string(e.what()));\n            throw PaymentProcessingException(\"\u652f\u6255\u3044\u51e6\u7406\u306b\u5931\u6557\u3057\u307e\u3057\u305f\", e);\n        }\n    }\n};\n\n\/\/ \u76e3\u8996\u30b7\u30b9\u30c6\u30e0\u3068\u306e\u7d71\u5408\u4f8b\nclass MonitoringSystem {\npublic:\n    static void handleException(const std::exception&amp; e, const std::string&amp; context) {\n        \/\/ \u30a8\u30e9\u30fc\u60c5\u5831\u306e\u53ce\u96c6\n        ErrorInfo errorInfo;\n        errorInfo.timestamp = std::chrono::system_clock::now();\n        errorInfo.errorType = typeid(e).name();\n        errorInfo.message = e.what();\n        errorInfo.context = context;\n\n        \/\/ \u30a2\u30e9\u30fc\u30c8\u306e\u767a\u884c\n        if (isHighPriorityError(errorInfo)) {\n            sendAlert(errorInfo);\n        }\n\n        \/\/ \u30e1\u30c8\u30ea\u30af\u30b9\u306e\u66f4\u65b0\n        updateErrorMetrics(errorInfo);\n\n        \/\/ \u30ed\u30b0\u306e\u8a18\u9332\n        logError(errorInfo);\n    }\n};<\/pre>\n\n\n\n<p>\u5b9f\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u304b\u3089\u5f97\u3089\u308c\u305f\u4e3b\u306a\u6559\u8a13\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4e00\u8cab\u3057\u305f\u4f8b\u5916\u51e6\u7406\u6226\u7565\u306e\u91cd\u8981\u6027<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f8b\u5916\u306e\u7a2e\u985e\u3068\u53d6\u308a\u6271\u3044\u65b9\u91dd\u3092\u6587\u66f8\u5316<\/li>\n\n\n\n<li>\u30c1\u30fc\u30e0\u5168\u4f53\u3067\u306e\u5171\u901a\u7406\u89e3\u306e\u91b8\u6210<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u76e3\u8996\u3068\u30ed\u30ae\u30f3\u30b0\u306e\u7d71\u5408<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f8b\u5916\u60c5\u5831\u306e\u4f53\u7cfb\u7684\u306a\u53ce\u96c6<\/li>\n\n\n\n<li>\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u52b9\u7387\u5316<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u306e\u4e21\u7acb<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u30d1\u30b9\u3067\u306e\u4f8b\u5916\u4f7f\u7528\u306e\u6700\u9069\u5316<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u51e6\u7406\u6226\u7565\u306e\u4f7f\u3044\u5206\u3051<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u4fdd\u5b88\u6027\u306e\u78ba\u4fdd<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f8b\u5916\u30af\u30e9\u30b9\u306e\u9069\u5207\u306a\u7c92\u5ea6\u8a2d\u8a08<\/li>\n\n\n\n<li>\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u6a19\u6e96\u5316<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"i-16\">\u30e2\u30c0\u30f3C++\u306b\u304a\u3051\u308b\u4f8b\u5916\u51e6\u7406\u306e\u9032\u5316<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-17\">C++17\u4ee5\u964d\u3067\u306e\u4f8b\u5916\u51e6\u7406\u306e\u6539\u5584\u70b9<\/h3>\n\n\n\n<p>C++17\u4ee5\u964d\u3001\u4f8b\u5916\u51e6\u7406\u306b\u95a2\u3059\u308b\u591a\u304f\u306e\u6539\u5584\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002\u4e3b\u306a\u5909\u66f4\u70b9\u3068\u6d3b\u7528\u65b9\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">#include &lt;variant&gt;\n#include &lt;optional&gt;\n#include &lt;string_view&gt;\n#include &lt;memory&gt;\n\n\/\/ std::variant\u3092\u4f7f\u7528\u3057\u305f\u30a8\u30e9\u30fc\u51e6\u7406\ntemplate&lt;typename T&gt;\nclass Result {\npublic:\n    struct Error {\n        std::string message;\n        int code;\n    };\n\n    Result(T value) : data_(std::move(value)) {}\n    Result(Error error) : data_(std::move(error)) {}\n\n    bool hasValue() const {\n        return std::holds_alternative&lt;T&gt;(data_);\n    }\n\n    const T&amp; value() const {\n        return std::get&lt;T&gt;(data_);\n    }\n\n    const Error&amp; error() const {\n        return std::get&lt;Error&gt;(data_);\n    }\n\nprivate:\n    std::variant&lt;T, Error&gt; data_;\n};\n\n\/\/ \u6587\u5b57\u5217\u51e6\u7406\u306e\u6539\u5584\u4f8b\nclass StringProcessor {\npublic:\n    Result&lt;int&gt; parseInteger(std::string_view str) {\n        try {\n            size_t pos;\n            int value = std::stoi(std::string(str), &amp;pos);\n            if (pos != str.length()) {\n                return Result&lt;int&gt;::Error{\"\u7121\u52b9\u306a\u6570\u5024\u5f62\u5f0f\", 1};\n            }\n            return value;\n        }\n        catch (const std::exception&amp; e) {\n            return Result&lt;int&gt;::Error{e.what(), 2};\n        }\n    }\n};\n\n\/\/ std::optional\u3092\u4f7f\u7528\u3057\u305f\u5b89\u5168\u306a\u5024\u306e\u53d6\u308a\u6271\u3044\nclass DataStore {\npublic:\n    std::optional&lt;std::string&gt; getValue(const std::string&amp; key) const {\n        auto it = data_.find(key);\n        if (it != data_.end()) {\n            return it-&gt;second;\n        }\n        return std::nullopt;\n    }\n\nprivate:\n    std::unordered_map&lt;std::string, std::string&gt; data_;\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-18\">noexcept\u30ad\u30fc\u30ef\u30fc\u30c9\u306e\u52b9\u679c\u7684\u306a\u4f7f\u7528\u6cd5<\/h3>\n\n\n\n<p>noexcept\u30ad\u30fc\u30ef\u30fc\u30c9\u306f\u3001\u95a2\u6570\u304c\u4f8b\u5916\u3092\u6295\u3052\u306a\u3044\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ModernResource {\npublic:\n    \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    ModernResource() noexcept = default;\n\n    \/\/ \u30e0\u30fc\u30d6\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\n    ModernResource(ModernResource&amp;&amp; other) noexcept \n        : data_(std::exchange(other.data_, nullptr))\n        , size_(std::exchange(other.size_, 0)) {}\n\n    \/\/ \u30e0\u30fc\u30d6\u4ee3\u5165\u6f14\u7b97\u5b50\n    ModernResource&amp; operator=(ModernResource&amp;&amp; other) noexcept {\n        if (this != &amp;other) {\n            cleanup();\n            data_ = std::exchange(other.data_, nullptr);\n            size_ = std::exchange(other.size_, 0);\n        }\n        return *this;\n    }\n\n    \/\/ \u30c7\u30b9\u30c8\u30e9\u30af\u30bf\n    ~ModernResource() noexcept {\n        cleanup();\n    }\n\n    \/\/ \u6761\u4ef6\u4ed8\u304dnoexcept\n    void resize(size_t newSize) noexcept(std::is_nothrow_constructible_v&lt;int&gt;) {\n        auto* newData = new int[newSize];\n        for (size_t i = 0; i &lt; std::min(size_, newSize); ++i) {\n            newData[i] = data_[i];\n        }\n        delete[] data_;\n        data_ = newData;\n        size_ = newSize;\n    }\n\nprivate:\n    int* data_ = nullptr;\n    size_t size_ = 0;\n\n    void cleanup() noexcept {\n        delete[] data_;\n        data_ = nullptr;\n        size_ = 0;\n    }\n};\n\n\/\/ noexcept\u306e\u6761\u4ef6\u5206\u5c90\ntemplate&lt;typename T&gt;\nclass Container {\npublic:\n    \/\/ is_nothrow_move_constructible\u304ctrue\u306e\u5834\u5408\u306e\u307fnoexcept\n    void push_back(T&amp;&amp; value) noexcept(std::is_nothrow_move_constructible_v&lt;T&gt;) {\n        if (size_ == capacity_) {\n            grow();\n        }\n        new (&amp;data_[size_]) T(std::move(value));\n        ++size_;\n    }\n\nprivate:\n    T* data_ = nullptr;\n    size_t size_ = 0;\n    size_t capacity_ = 0;\n\n    void grow() {\n        \/\/ \u5b9f\u88c5\u7701\u7565\n    }\n};<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"i-19\">\u5c06\u6765\u306e\u5c55\u671b\u3068\u6ce8\u76ee\u3059\u3079\u304d\u52d5\u5411<\/h3>\n\n\n\n<p>C++\u306e\u4f8b\u5916\u51e6\u7406\u306f\u4eca\u5f8c\u3082\u9032\u5316\u3092\u7d9a\u3051\u3066\u3044\u307e\u3059\u3002\u4e3b\u306a\u6ce8\u76ee\u30dd\u30a4\u30f3\u30c8\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>static\u4f8b\u5916\u4ed5\u69d8<\/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\u7684\u306astatic\u4f8b\u5916\u4ed5\u69d8\u306e\u4f8b\nvoid processData() throws(NetworkError, DatabaseError) {\n    \/\/ \u5b9f\u88c5\n}<\/pre>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u30bc\u30ed\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u4f8b\u5916\u51e6\u7406\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=\"\">\/\/ \u78ba\u5b9a\u7684\u306a\u4f8b\u5916\u51e6\u7406\u30d1\u30bf\u30fc\u30f3\nclass DeterministicResource {\npublic:\n    [[expects: no_fail]] void allocate(size_t size) {\n        \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u5931\u6557\u3057\u306a\u3044\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u308b\u5b9f\u88c5\n    }\n\n    [[ensures: no_throw]] void cleanup() {\n        \/\/ \u4f8b\u5916\u3092\u6295\u3052\u306a\u3044\u5b9f\u88c5\u304c\u4fdd\u8a3c\u3055\u308c\u308b\n    }\n};<\/pre>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068\u306e\u7d71\u5408<\/strong><\/li>\n<\/ol>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u5c06\u6765\u7684\u306a\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3092\u7528\u3044\u305f\u4f8b\u5916\u51e6\u7406\nResult&lt;int&gt; processValue(const std::variant&lt;int, std::string&gt;&amp; value) {\n    inspect (value) {\n        &lt;int&gt; i =&gt; return Result&lt;int&gt;{i * 2};\n        &lt;std::string&gt; s =&gt; return Result&lt;int&gt;::Error{\"\u6587\u5b57\u5217\u306f\u51e6\u7406\u3067\u304d\u307e\u305b\u3093\"};\n    }\n}<\/pre>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u4f8b\u5916\u51e6\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=\"\">\/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u4f8b\u5916\u30c1\u30a7\u30c3\u30af\ntemplate&lt;typename T&gt;\nconstexpr bool validateType() {\n    if constexpr (!std::is_default_constructible_v&lt;T&gt;) {\n        return false;\n    }\n    if constexpr (!std::is_copy_constructible_v&lt;T&gt;) {\n        return false;\n    }\n    return true;\n}\n\ntemplate&lt;typename T&gt;\nclass SafeContainer {\n    static_assert(validateType&lt;T&gt;(), \"\u578bT\u306f\u5fc5\u8981\u306a\u8981\u4ef6\u3092\u6e80\u305f\u3057\u3066\u3044\u307e\u305b\u3093\");\n    \/\/ \u5b9f\u88c5\n};<\/pre>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u9032\u5316\u306b\u3088\u308a\u3001C++\u306e\u4f8b\u5916\u51e6\u7406\u306f\u4ee5\u4e0b\u306e\u65b9\u5411\u6027\u306b\u5411\u304b\u3063\u3066\u3044\u307e\u3059\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u3088\u308a\u5b89\u5168\u306a\u4f8b\u5916\u51e6\u7406<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306e\u30c1\u30a7\u30c3\u30af\u5f37\u5316<\/li>\n\n\n\n<li>\u578b\u30b7\u30b9\u30c6\u30e0\u3068\u306e\u7d71\u5408<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30bc\u30ed\u30b3\u30b9\u30c8\u62bd\u8c61\u5316\u306e\u8ffd\u6c42<\/li>\n\n\n\n<li>\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u6700\u9069\u5316\u306e\u5f37\u5316<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8868\u73fe\u529b\u306e\u5411\u4e0a<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30d1\u30bf\u30fc\u30f3\u30de\u30c3\u30c1\u30f3\u30b0\u3068\u306e\u7d71\u5408<\/li>\n\n\n\n<li>\u3088\u308a\u76f4\u611f\u7684\u306a\u69cb\u6587<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u9032\u5316\u3092\u8e0f\u307e\u3048\u3001\u73fe\u4ee3\u306eC++\u958b\u767a\u3067\u306f\u4ee5\u4e0b\u306e\u70b9\u306b\u6ce8\u610f\u3092\u6255\u3046\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65b0\u3057\u3044\u8a00\u8a9e\u6a5f\u80fd\u306e\u9069\u5207\u306a\u6d3b\u7528<\/li>\n\n\n\n<li>\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u5b89\u5168\u6027\u306e\u30d0\u30e9\u30f3\u30b9<\/li>\n\n\n\n<li>\u5c06\u6765\u306e\u62e1\u5f35\u6027\u3092\u8003\u616e\u3057\u305f\u8a2d\u8a08<\/li>\n\n\n\n<li>\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u65b0\u6a5f\u80fd\u306e\u6d3b\u7528<\/li>\n<\/ul>\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; 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