{"id":118628,"date":"2026-10-27T21:24:39","date_gmt":"2026-10-27T13:24:39","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/118628.html"},"modified":"2026-10-27T21:24:39","modified_gmt":"2026-10-27T13:24:39","slug":"c20-vs-c17%ef%bc%9a%e6%96%b0%e7%89%b9%e6%80%a7%e5%af%b9%e6%af%94%e4%b8%8e%e7%94%a8%e6%b3%95%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/118628.html","title":{"rendered":"C++20 vs C++17\uff1a\u65b0\u7279\u6027\u5bf9\u6bd4\u4e0e\u7528\u6cd5\u6307\u5357"},"content":{"rendered":"<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>C&#043;&#043;20 vs C&#043;&#043;17&#xff1a;\u65b0\u7279\u6027\u5bf9\u6bd4\u4e0e\u7528\u6cd5\u6307\u5357<\/li>\n<li>\n<ul>\n<li>\u4e00\u3001\u6a21\u677f\u7ea6\u675f&#xff1a;Concepts<\/li>\n<li>\u4e8c\u3001\u6570\u636e\u5904\u7406&#xff1a;Ranges<\/li>\n<li>\u4e09\u3001\u534f\u7a0b&#xff1a;Coroutines<\/li>\n<li>\u56db\u3001\u6a21\u5757&#xff1a;Modules<\/li>\n<li>\u4e94\u3001\u6bd4\u8f83\u8fd0\u7b97\u7b26&#xff1a;&#096;&lt;&#061;&gt; &#096; \u98de\u8239\u64cd\u4f5c\u7b26<\/li>\n<li>\u516d\u3001\u683c\u5f0f\u5316&#xff1a;std::format<\/li>\n<li>\u4e03\u3001\u8fde\u7eed\u5185\u5b58\u89c6\u56fe&#xff1a;std::span<\/li>\n<li>\u516b\u3001\u7ebf\u7a0b&#xff1a;std::jthread<\/li>\n<li>\u4e5d\u3001\u7f16\u8bd1\u671f\u589e\u5f3a&#xff1a;consteval \/ constinit<\/li>\n<li>\u5341\u3001\u5176\u4ed6\u597d\u7528\u7684\u5c0f\u7279\u6027<\/li>\n<li>\n<ul>\n<li>\u6307\u5b9a\u521d\u59cb\u5316\u5668&#xff08;Designated Initializers&#xff09;<\/li>\n<li>std::source_location&#xff1a;\u66ff\u4ee3 &#096;__FILE__&#096; \/ &#096;__LINE__&#096;<\/li>\n<li>\u4f4d\u64cd\u4f5c\u5de5\u5177 &lt;bit&gt;<\/li>\n<li>\u5bb9\u5668\u589e\u5f3a<\/li>\n<li>\u65e5\u5386\u4e0e\u65f6\u533a&#xff08;&lt;chrono&gt; \u5927\u6269\u5c55&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>\u5341\u4e00\u3001\u7279\u6027\u5206\u5c42\u91c7\u7528\u5efa\u8bae<\/li>\n<li>\u5341\u4e8c\u3001\u4e00\u53e5\u8bdd\u8bb0\u5fc6<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>C&#043;&#043;20 vs C&#043;&#043;17&#xff1a;\u65b0\u7279\u6027\u5bf9\u6bd4\u4e0e\u7528\u6cd5\u6307\u5357<\/h2>\n<p>C&#043;&#043;20 \u662f\u7ee7 C&#043;&#043;11 \u4e4b\u540e\u6700\u5927\u7684\u4e00\u6b21\u5347\u7ea7&#xff0c;\u6838\u5fc3\u662f\u56db\u5927\u652f\u67f1&#xff1a;Concepts\u3001Ranges\u3001Coroutines\u3001Modules\u3002\u4e0b\u9762\u7ee7\u7eed\u7528\u300cC&#043;&#043;17 \u600e\u4e48\u5199 \u2192 C&#043;&#043;20 \u600e\u4e48\u5199\u300d\u7684\u5bf9\u6bd4\u65b9\u5f0f&#xff0c;\u628a\u6bcf\u4e2a\u7279\u6027\u7684\u7528\u6cd5\u3001\u6536\u76ca\u548c\u5751\u90fd\u8bb2\u6e05\u695a\u3002<\/p>\n<hr \/>\n<h3>\u4e00\u3001\u6a21\u677f\u7ea6\u675f&#xff1a;Concepts<\/h3>\n<p>C&#043;&#043;17&#xff1a;\u9760 static_assert &#043; \u7c7b\u578b\u8403\u53d6&#xff0c;\u62a5\u9519\u4fe1\u606f\u50cf\u5929\u4e66 C&#043;&#043;20&#xff1a;\u628a\u201c\u7c7b\u578b\u5fc5\u987b\u6ee1\u8db3\u4ec0\u4e48\u201d\u5199\u6210\u4ee3\u7801\u672c\u8eab<\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;17 \u2014 SFINAE \/ static_assert<\/span><br \/>\n<span class=\"token keyword\">template<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">typename<\/span> <span class=\"token class-name\">T<\/span><span class=\"token operator\">&gt;<\/span><br \/>\nT <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>T a<span class=\"token punctuation\">,<\/span> T b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">static_assert<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span>is_arithmetic_v<span class=\"token operator\">&lt;<\/span>T<span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;T must be arithmetic&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token comment\">\/\/ \u4f20\u9519\u7c7b\u578b\u65f6&#xff1a;\u62a5\u9519\u5728\u51fd\u6570\u4f53\u6df1\u5904&#xff0c;\u51e0\u767e\u884c\u6a21\u677f\u56de\u6eaf<\/span><\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;20 \u2014 Concepts<\/span><br \/>\n<span class=\"token keyword\">template<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">typename<\/span> <span class=\"token class-name\">T<\/span><span class=\"token operator\">&gt;<\/span><br \/>\n<span class=\"token keyword\">concept<\/span> <span class=\"token class-name\">Number<\/span> <span class=\"token operator\">&#061;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>integral<span class=\"token operator\">&lt;<\/span>T<span class=\"token operator\">&gt;<\/span> <span class=\"token operator\">||<\/span> std<span class=\"token double-colon punctuation\">::<\/span>floating_point<span class=\"token operator\">&lt;<\/span>T<span class=\"token operator\">&gt;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">template<\/span> <span class=\"token operator\">&lt;<\/span>Number T<span class=\"token operator\">&gt;<\/span><br \/>\nT <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>T a<span class=\"token punctuation\">,<\/span> T b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u6216\u66f4\u7b80\u6d01\u7684\u7f29\u5199\u8bed\u6cd5<\/span><br \/>\n<span class=\"token keyword\">auto<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>Number <span class=\"token keyword\">auto<\/span> a<span class=\"token punctuation\">,<\/span> Number <span class=\"token keyword\">auto<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p>\u4f20\u9519\u7c7b\u578b\u65f6&#xff0c;\u7f16\u8bd1\u5668\u76f4\u63a5\u8bf4\u201cNumber \u7ea6\u675f\u672a\u6ee1\u8db3\u201d&#xff0c;\u800c\u4e0d\u662f\u5410\u4e00\u5c4f\u6a21\u677f\u5c55\u5f00\u3002<\/p>\n<p>\u81ea\u5b9a\u4e49 concept&#xff1a;<\/p>\n<p><span class=\"token keyword\">template<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">typename<\/span> <span class=\"token class-name\">T<\/span><span class=\"token operator\">&gt;<\/span><br \/>\n<span class=\"token keyword\">concept<\/span> <span class=\"token class-name\">Container<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">requires<\/span><span class=\"token punctuation\">(<\/span>T t<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    t<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    t<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">typename<\/span> <span class=\"token class-name\">T<\/span><span class=\"token double-colon punctuation\">::<\/span>value_type<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<h3>\u4e8c\u3001\u6570\u636e\u5904\u7406&#xff1a;Ranges<\/h3>\n<p>C&#043;&#043;17&#xff1a;\u7b97\u6cd5\u8981\u4f20\u8fed\u4ee3\u5668\u5bf9&#xff0c;\u7ec4\u5408\u591a\u4e2a\u64cd\u4f5c\u8981\u4e2d\u95f4\u5bb9\u5668 C&#043;&#043;20&#xff1a;\u7b97\u6cd5\u76f4\u63a5\u4f5c\u7528\u4e8e\u8303\u56f4&#xff0c;\u7528 | \u7ba1\u9053\u7ec4\u5408&#xff0c;\u89c6\u56fe\u60f0\u6027\u6c42\u503c<\/p>\n<p>std<span class=\"token double-colon punctuation\">::<\/span>vector<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span> nums <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">6<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">7<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">8<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">9<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;17 \u2014 \u591a\u6b65\u3001\u8981\u4e34\u65f6\u5bb9\u5668<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>vector<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span> evens<span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">copy_if<\/span><span class=\"token punctuation\">(<\/span>nums<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> nums<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n             std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">back_inserter<\/span><span class=\"token punctuation\">(<\/span>evens<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n             <span class=\"token keyword\">int<\/span> n<span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> n <span class=\"token operator\">%<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>vector<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span> squared<span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">transform<\/span><span class=\"token punctuation\">(<\/span>evens<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> evens<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n               std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">back_inserter<\/span><span class=\"token punctuation\">(<\/span>squared<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n               <span class=\"token keyword\">int<\/span> n<span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> n <span class=\"token operator\">*<\/span> n<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;20 \u2014 \u4e00\u6761\u7ba1\u9053&#xff0c;\u96f6\u4e2d\u95f4\u62f7\u8d1d<\/span><br \/>\n<span class=\"token keyword\">auto<\/span> view <span class=\"token operator\">&#061;<\/span> nums<br \/>\n    <span class=\"token operator\">|<\/span> std<span class=\"token double-colon punctuation\">::<\/span>views<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">filter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> n<span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> n <span class=\"token operator\">%<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token operator\">|<\/span> std<span class=\"token double-colon punctuation\">::<\/span>views<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">transform<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> n<span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> n <span class=\"token operator\">*<\/span> n<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> x <span class=\"token operator\">:<\/span> view<span class=\"token punctuation\">)<\/span> std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> x <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; &#034;<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ 4 16 36 64 81&#8230;<\/span><\/p>\n<p>\u8981\u70b9&#xff1a;<\/p>\n<ul>\n<li>\u89c6\u56fe\u4e0d\u62e5\u6709\u6570\u636e&#xff0c;\u53ea\u5728\u904d\u5386\u65f6\u8ba1\u7b97<\/li>\n<li>\u60f3\u843d\u76d8\u6210\u5bb9\u5668&#xff1a;std::vector&lt;int&gt; result(view.begin(), view.end());&#xff08;std::ranges::to \u662f C&#043;&#043;23&#xff09;<\/li>\n<\/ul>\n<p>\u6392\u5e8f\u4e5f\u66f4\u7b80\u6d01&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;17<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span>v<span class=\"token punctuation\">.<\/span><span class=\"token function\">begin<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> v<span class=\"token punctuation\">.<\/span><span class=\"token function\">end<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;20<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>ranges<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span>v<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>ranges<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">sort<\/span><span class=\"token punctuation\">(<\/span>v<span class=\"token punctuation\">,<\/span> std<span class=\"token double-colon punctuation\">::<\/span>greater<span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>Person<span class=\"token double-colon punctuation\">::<\/span>age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u76f4\u63a5\u6309\u6210\u5458\u6392\u5e8f<\/span><\/p>\n<hr \/>\n<h3>\u4e09\u3001\u534f\u7a0b&#xff1a;Coroutines<\/h3>\n<p>C&#043;&#043;17&#xff1a;\u5f02\u6b65\/\u60f0\u6027\u5e8f\u5217\u53ea\u80fd\u9760\u56de\u8c03\u3001\u72b6\u6001\u673a\u3001\u624b\u5199\u8fed\u4ee3\u5668 C&#043;&#043;20&#xff1a;co_await \/ co_yield \/ co_return \u8ba9\u51fd\u6570\u80fd\u6682\u505c\u548c\u6062\u590d<\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;17 \u2014 \u751f\u6210\u6590\u6ce2\u90a3\u5951\u8981\u624b\u5199\u8fed\u4ee3\u5668\u6216\u95ed\u5305\u72b6\u6001<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Fib<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> b <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> <span class=\"token keyword\">operator<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> next <span class=\"token operator\">&#061;<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n        a <span class=\"token operator\">&#061;<\/span> b<span class=\"token punctuation\">;<\/span> b <span class=\"token operator\">&#061;<\/span> next <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> next<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;20 \u2014 \u534f\u7a0b\u751f\u6210\u5668&#xff08;\u9700\u8981\u81ea\u5df1\u5b9a\u4e49 promise_type \u6216\u7528\u5e93&#xff09;<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;coroutine&gt;<\/span><\/span><br \/>\n<span class=\"token keyword\">template<\/span> <span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">typename<\/span> <span class=\"token class-name\">T<\/span><span class=\"token operator\">&gt;<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Generator<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">promise_type<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        T current<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">auto<\/span> <span class=\"token function\">yield_value<\/span><span class=\"token punctuation\">(<\/span>T v<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> current <span class=\"token operator\">&#061;<\/span> v<span class=\"token punctuation\">;<\/span> <span class=\"token keyword\">return<\/span> std<span class=\"token double-colon punctuation\">::<\/span>suspend_always<span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">auto<\/span> <span class=\"token function\">get_return_object<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> Generator<span class=\"token punctuation\">{<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>suspend_always <span class=\"token function\">initial_suspend<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n        std<span class=\"token double-colon punctuation\">::<\/span>suspend_always <span class=\"token function\">final_suspend<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">noexcept<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">void<\/span> <span class=\"token function\">return_void<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token keyword\">void<\/span> <span class=\"token function\">unhandled_exception<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">terminate<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ &#8230; \u8fed\u4ee3\u5668\u5c01\u88c5\u7701\u7565<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>Generator<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span> <span class=\"token function\">fibonacci<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> b <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">co_yield<\/span> a<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">auto<\/span> next <span class=\"token operator\">&#061;<\/span> a <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span><br \/>\n        a <span class=\"token operator\">&#061;<\/span> b<span class=\"token punctuation\">;<\/span> b <span class=\"token operator\">&#061;<\/span> next<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> x <span class=\"token operator\">:<\/span> <span class=\"token function\">fibonacci<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>x <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">break<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> x <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; &#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u26a0\ufe0f \u91cd\u8981\u8fb9\u754c&#xff1a;C&#043;&#043;20 \u53ea\u7ed9\u4e86\u534f\u7a0b\u7684\u5e95\u5c42\u673a\u5236&#xff0c;\u6807\u51c6\u5e93\u6ca1\u6709\u63d0\u4f9b\u73b0\u6210\u7684 task \/ generator \u7c7b\u578b&#xff08;\u90a3\u4e9b\u662f C&#043;&#043;23 \u7684 std::generator&#xff0c;\u6216\u90e8\u5206\u7b2c\u4e09\u65b9\u5e93\u5982 cppcoro&#xff09;\u3002\u751f\u4ea7\u91cc\u522b\u88f8\u5199 promise_type&#xff0c;\u7528\u5c01\u88c5\u597d\u7684\u5e93\u3002<\/p>\n<hr \/>\n<h3>\u56db\u3001\u6a21\u5757&#xff1a;Modules<\/h3>\n<p>C&#043;&#043;17&#xff1a;\u9760 #include \u6587\u672c\u66ff\u6362&#xff0c;\u91cd\u590d\u89e3\u6790\u3001\u5b8f\u6cc4\u6f0f\u3001\u7f16\u8bd1\u6162 C&#043;&#043;20&#xff1a;import \u66ff\u4ee3 #include&#xff0c;\u663e\u5f0f\u5bfc\u51fa&#xff0c;\u7f16\u8bd1\u4e00\u6b21\u590d\u7528<\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;17 \u2014 math.h<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">ifndef<\/span> <span class=\"token expression\">MATH_H<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">define<\/span> <span class=\"token macro-name\">MATH_H<\/span><\/span><br \/>\n<span class=\"token keyword\">inline<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">endif<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;20 \u2014 math.cppm<\/span><br \/>\n<span class=\"token keyword\">export<\/span> <span class=\"token keyword\">module<\/span> <span class=\"token module\">math<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">export<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> a<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> b<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4f7f\u7528\u65b9<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token module\">math<\/span><span class=\"token punctuation\">;<\/span>          <span class=\"token comment\">\/\/ \u4e0d\u662f #include<\/span><br \/>\n<span class=\"token keyword\">int<\/span> x <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6a21\u5757\u7279\u70b9&#xff1a;<\/p>\n<ul>\n<li>\u9ed8\u8ba4\u5c01\u95ed&#xff0c;\u4e0d\u5bfc\u51fa\u7684\u7b26\u53f7\u5bf9\u5916\u4e0d\u53ef\u89c1<\/li>\n<li>\u5b8f\u4e0d\u4f1a\u6cc4\u6f0f\u5230\u5bfc\u5165\u65b9<\/li>\n<li>\u7f16\u8bd1\u901f\u5ea6\u66f4\u5feb&#xff08;BMI \u7f13\u5b58&#xff09;<\/li>\n<\/ul>\n<p>\u26a0\ufe0f \u6a21\u5757\u5bf9\u6784\u5efa\u7cfb\u7edf\u8981\u6c42\u9ad8&#xff1a;CMake \u9700 3.28&#043;&#xff0c;GCC\/Clang\/MSVC \u652f\u6301\u7a0b\u5ea6\u4e0d\u4e00\u3002\u8001\u9879\u76ee\u522b\u4e00\u6b21\u6027\u8fc1\u79fb&#xff0c;\u5934\u6587\u4ef6\u548c\u6a21\u5757\u53ef\u957f\u671f\u5171\u5b58\u3002<\/p>\n<hr \/>\n<h3>\u4e94\u3001\u6bd4\u8f83\u8fd0\u7b97\u7b26&#xff1a;&lt;&#061;&gt;  \u98de\u8239\u64cd\u4f5c\u7b26<\/h3>\n<p>C&#043;&#043;17&#xff1a;\u8981\u624b\u5199 &#061;&#061; !&#061; &lt; &gt; &lt;&#061; &gt;&#061; \u516d\u4e2a\u8fd0\u7b97\u7b26 C&#043;&#043;20&#xff1a;\u4e00\u884c &#061; default \u81ea\u52a8\u5408\u6210\u5168\u90e8<\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;17<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Point<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">bool<\/span> <span class=\"token keyword\">operator<\/span><span class=\"token operator\">&#061;&#061;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> Point<span class=\"token operator\">&amp;<\/span> o<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> x<span class=\"token operator\">&#061;&#061;<\/span>o<span class=\"token punctuation\">.<\/span>x <span class=\"token operator\">&amp;&amp;<\/span> y<span class=\"token operator\">&#061;&#061;<\/span>o<span class=\"token punctuation\">.<\/span>y<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">bool<\/span> <span class=\"token keyword\">operator<\/span><span class=\"token operator\">!&#061;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> Point<span class=\"token operator\">&amp;<\/span> o<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> <span class=\"token operator\">!<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span><span class=\"token keyword\">this<\/span> <span class=\"token operator\">&#061;&#061;<\/span> o<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">bool<\/span> <span class=\"token keyword\">operator<\/span><span class=\"token operator\">&lt;<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> Point<span class=\"token operator\">&amp;<\/span> o<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> x<span class=\"token operator\">&lt;<\/span>o<span class=\"token punctuation\">.<\/span>x <span class=\"token operator\">||<\/span> <span class=\"token punctuation\">(<\/span>x<span class=\"token operator\">&#061;&#061;<\/span>o<span class=\"token punctuation\">.<\/span>x <span class=\"token operator\">&amp;&amp;<\/span> y<span class=\"token operator\">&lt;<\/span>o<span class=\"token punctuation\">.<\/span>y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token comment\">\/\/ &#8230; \u8fd8\u6709 &gt; &lt;&#061; &gt;&#061;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;20<\/span><br \/>\n<span class=\"token keyword\">struct<\/span> <span class=\"token class-name\">Point<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">auto<\/span> <span class=\"token keyword\">operator<\/span><span class=\"token operator\">&lt;&#061;&gt;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> Point<span class=\"token operator\">&amp;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">default<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5168\u6709\u4e86<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u9700\u8981\u81ea\u5b9a\u4e49\u987a\u5e8f\u65f6&#xff1a;<\/p>\n<p><span class=\"token keyword\">auto<\/span> <span class=\"token keyword\">operator<\/span><span class=\"token operator\">&lt;&#061;&gt;<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> Person<span class=\"token operator\">&amp;<\/span> o<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">const<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> age <span class=\"token operator\">&lt;&#061;&gt;<\/span> o<span class=\"token punctuation\">.<\/span>age<span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ \u53ea\u6309\u5e74\u9f84\u6bd4\u8f83&#xff0c;\u5176\u4f59\u81ea\u52a8\u63a8\u5bfc<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<hr \/>\n<h3>\u516d\u3001\u683c\u5f0f\u5316&#xff1a;std::format<\/h3>\n<p>C&#043;&#043;17&#xff1a;printf \u4e0d\u5b89\u5168&#xff0c;cout \u62fc\u63a5\u5570\u55e6 C&#043;&#043;20&#xff1a;\u7c7b\u578b\u5b89\u5168\u3001\u7f16\u8bd1\u671f\u68c0\u67e5\u683c\u5f0f\u4e32<\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;17<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Hello %s, age %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> name<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Hello &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> name <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;, age &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> age <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;20<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;format&gt;<\/span><\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>string s <span class=\"token operator\">&#061;<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">format<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Hello {}, age {}&#034;<\/span><span class=\"token punctuation\">,<\/span> name<span class=\"token punctuation\">,<\/span> age<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> s <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6ce8&#xff1a;std::print \/ std::println \u662f C&#043;&#043;23 \u624d\u6709\u7684&#xff0c;C&#043;&#043;20 \u53ea\u6709 std::format\u3002<\/p>\n<hr \/>\n<h3>\u4e03\u3001\u8fde\u7eed\u5185\u5b58\u89c6\u56fe&#xff1a;std::span<\/h3>\n<p>C&#043;&#043;17&#xff1a;\u51fd\u6570\u53c2\u6570\u5e38\u7528 T* &#043; size_t \u4e24\u53c2\u6570&#xff0c;\u5bb9\u6613\u4e0d\u4e00\u81f4 C&#043;&#043;20&#xff1a;std::span \u628a\u201c\u6307\u9488&#043;\u957f\u5ea6\u201d\u6253\u5305\u6210\u4e00\u4e2a\u5b89\u5168\u89c6\u56fe<\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;17<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">process<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">uint8_t<\/span><span class=\"token operator\">*<\/span> data<span class=\"token punctuation\">,<\/span> size_t len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;20<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">process<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span>span<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">const<\/span> <span class=\"token keyword\">uint8_t<\/span><span class=\"token operator\">&gt;<\/span> data<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">auto<\/span> b <span class=\"token operator\">:<\/span> data<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/* &#8230; *\/<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> data<span class=\"token punctuation\">.<\/span><span class=\"token function\">size<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>std<span class=\"token double-colon punctuation\">::<\/span>vector<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">uint8_t<\/span><span class=\"token operator\">&gt;<\/span> v <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">uint8_t<\/span> arr<span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token function\">process<\/span><span class=\"token punctuation\">(<\/span>v<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>          <span class=\"token comment\">\/\/ OK<\/span><br \/>\n<span class=\"token function\">process<\/span><span class=\"token punctuation\">(<\/span>arr<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>        <span class=\"token comment\">\/\/ OK<\/span><br \/>\n<span class=\"token function\">process<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span>v<span class=\"token punctuation\">.<\/span><span class=\"token function\">data<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5b50\u533a\u95f4\u4e5f OK<\/span><\/p>\n<p>\u96f6\u5f00\u9500\u3001\u5e26\u8fb9\u754c\u68c0\u67e5&#xff08;debug \u6a21\u5f0f&#xff09;\u3001\u4e0d\u62e5\u6709\u5185\u5b58\u3002<\/p>\n<hr \/>\n<h3>\u516b\u3001\u7ebf\u7a0b&#xff1a;std::jthread<\/h3>\n<p>C&#043;&#043;17&#xff1a;std::thread \u5fd8\u4e86 join() \u5c31\u76f4\u63a5 terminate C&#043;&#043;20&#xff1a;\u6790\u6784\u81ea\u52a8 join&#xff0c;\u8fd8\u652f\u6301\u534f\u4f5c\u5f0f\u53d6\u6d88<\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;17<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span>thread <span class=\"token function\">t<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/* \u957f\u65f6\u95f4\u5de5\u4f5c *\/<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5982\u679c\u5fd8\u8bb0 t.join(); \u7a0b\u5e8f\u76f4\u63a5\u5d29<\/span><\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;20<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">worker<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span>stop_token st<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>st<span class=\"token punctuation\">.<\/span><span class=\"token function\">stop_requested<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5b9a\u671f\u68c0\u67e5\u53d6\u6d88\u4fe1\u53f7<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>std<span class=\"token double-colon punctuation\">::<\/span>jthread <span class=\"token function\">t<\/span><span class=\"token punctuation\">(<\/span>worker<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u6790\u6784\u65f6\u81ea\u52a8\u8bf7\u6c42\u505c\u6b62 &#043; \u81ea\u52a8 join<\/span><br \/>\nt<span class=\"token punctuation\">.<\/span><span class=\"token function\">request_stop<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u914d\u5957\u7684\u540c\u6b65\u539f\u8bed\u4e5f\u8865\u9f50\u4e86&#xff1a;std::latch\u3001std::barrier\u3001std::counting_semaphore\u3001std::stop_token\u3002<\/p>\n<hr \/>\n<h3>\u4e5d\u3001\u7f16\u8bd1\u671f\u589e\u5f3a&#xff1a;consteval \/ constinit<\/h3>\n<p>C&#043;&#043;17&#xff1a;constexpr \u8868\u793a\u201c\u53ef\u4ee5\u5728\u7f16\u8bd1\u671f\u7b97\u201d&#xff0c;\u4f46\u4e0d\u5f3a\u5236 C&#043;&#043;20&#xff1a;consteval \u5f3a\u5236\u7f16\u8bd1\u671f&#xff0c;constinit \u4fdd\u8bc1\u9759\u6001\u521d\u59cb\u5316\u987a\u5e8f<\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;17<\/span><br \/>\n<span class=\"token keyword\">constexpr<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">sq<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> x <span class=\"token operator\">*<\/span> x<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">sq<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ \u7f16\u8bd1\u671f<\/span><br \/>\n<span class=\"token keyword\">int<\/span> b <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">sq<\/span><span class=\"token punctuation\">(<\/span><span class=\"token function\">rand<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ \u4e5f\u5408\u6cd5&#xff0c;\u8fd0\u884c\u671f<\/span><\/p>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;20<\/span><br \/>\n<span class=\"token keyword\">consteval<\/span> <span class=\"token keyword\">int<\/span> <span class=\"token function\">sq<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> x <span class=\"token operator\">*<\/span> x<span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">int<\/span> a <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">sq<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>     <span class=\"token comment\">\/\/ OK<\/span><br \/>\n<span class=\"token comment\">\/\/ int b &#061; sq(rand());  \/\/ \u7f16\u8bd1\u9519\u8bef&#xff1a;\u5fc5\u987b\u7f16\u8bd1\u671f\u53ef\u6c42<\/span><\/p>\n<p><span class=\"token keyword\">constinit<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> global <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">42<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u4fdd\u8bc1\u5728\u9759\u6001\u521d\u59cb\u5316\u9636\u6bb5\u5b8c\u6210&#xff0c;\u907f\u514d\u9759\u6001\u521d\u59cb\u5316\u987a\u5e8f\u707e\u96be<\/span><\/p>\n<hr \/>\n<h3>\u5341\u3001\u5176\u4ed6\u597d\u7528\u7684\u5c0f\u7279\u6027<\/h3>\n<h4>\u6307\u5b9a\u521d\u59cb\u5316\u5668&#xff08;Designated Initializers&#xff09;<\/h4>\n<p><span class=\"token comment\">\/\/ C&#043;&#043;20<\/span><br \/>\nConfig cfg<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>host <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;localhost&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>port <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">8080<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">.<\/span>timeout_ms <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">3000<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u5b57\u6bb5\u987a\u5e8f\u53ef\u4e71\u3001\u53ef\u7f3a\u7701&#xff0c;\u6bd4\u4f4d\u7f6e\u521d\u59cb\u5316\u5b89\u5168\u5f97\u591a<\/span><\/p>\n<h4>std::source_location&#xff1a;\u66ff\u4ee3 __FILE__ \/ __LINE__<\/h4>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>std<span class=\"token double-colon punctuation\">::<\/span>string_view msg<span class=\"token punctuation\">,<\/span><br \/>\n         std<span class=\"token double-colon punctuation\">::<\/span>source_location loc <span class=\"token operator\">&#061;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>source_location<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">current<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> loc<span class=\"token punctuation\">.<\/span><span class=\"token function\">file_name<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;:&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> loc<span class=\"token punctuation\">.<\/span><span class=\"token function\">line<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n              <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> msg <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u4f4d\u64cd\u4f5c\u5de5\u5177 <\/h4>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;bit&gt;<\/span><\/span><br \/>\n<span class=\"token keyword\">int<\/span> pop <span class=\"token operator\">&#061;<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">popcount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0b1101<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>   <span class=\"token comment\">\/\/ 3<\/span><br \/>\n<span class=\"token keyword\">int<\/span> z <span class=\"token operator\">&#061;<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">countl_zero<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">8u<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>      <span class=\"token comment\">\/\/ \u524d\u5bfc\u96f6\u4e2a\u6570<\/span><br \/>\n<span class=\"token keyword\">auto<\/span> b <span class=\"token operator\">&#061;<\/span> std<span class=\"token double-colon punctuation\">::<\/span><span class=\"token generic-function\"><span class=\"token function\">bit_cast<\/span><span class=\"token generic class-name\"><span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">float<\/span><span class=\"token operator\">&gt;<\/span><\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0x3f800000<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5b89\u5168\u7c7b\u578b\u8f6c\u6362<\/span><\/p>\n<h4>\u5bb9\u5668\u589e\u5f3a<\/h4>\n<p>std<span class=\"token double-colon punctuation\">::<\/span>vector<span class=\"token operator\">&lt;<\/span><span class=\"token keyword\">int<\/span><span class=\"token operator\">&gt;<\/span> v <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ C&#043;&#043;20 \u65b0\u589e\u81ea\u7531\u51fd\u6570<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">erase<\/span><span class=\"token punctuation\">(<\/span>v<span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>              <span class=\"token comment\">\/\/ \u5220\u9664\u6240\u6709\u7b49\u4e8e3\u7684\u5143\u7d20<\/span><br \/>\nstd<span class=\"token double-colon punctuation\">::<\/span><span class=\"token function\">erase_if<\/span><span class=\"token punctuation\">(<\/span>v<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> x<span class=\"token punctuation\">{<\/span> <span class=\"token keyword\">return<\/span> x <span class=\"token operator\">%<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>v<span class=\"token punctuation\">.<\/span><span class=\"token function\">contains<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">42<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span> <span class=\"token comment\">\/* map \u65b0\u589e contains()&#xff0c;\u6bd4 count() \u8bed\u4e49\u6e05\u6670 *\/<\/span> <span class=\"token punctuation\">}<\/span><\/p>\n<h4>\u65e5\u5386\u4e0e\u65f6\u533a&#xff08; \u5927\u6269\u5c55&#xff09;<\/h4>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token double-colon punctuation\">::<\/span>chrono<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">auto<\/span> tp <span class=\"token operator\">&#061;<\/span> sys_days<span class=\"token punctuation\">{<\/span><span class=\"token number\">2026<\/span>y<span class=\"token operator\">\/<\/span><span class=\"token number\">10<\/span><span class=\"token operator\">\/<\/span><span class=\"token number\">27<\/span><span class=\"token punctuation\">}<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">14<\/span>h <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">30<\/span>min<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token comment\">\/\/ \u65f6\u533a\u8f6c\u6362<\/span><br \/>\n<span class=\"token keyword\">auto<\/span> zoned <span class=\"token operator\">&#061;<\/span> zoned_time<span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;Asia\/Shanghai&#034;<\/span><span class=\"token punctuation\">,<\/span> tp<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<hr \/>\n<h3>\u5341\u4e00\u3001\u7279\u6027\u5206\u5c42\u91c7\u7528\u5efa\u8bae<\/h3>\n<p>\u4e0d\u662f\u6240\u6709 C&#043;&#043;20 \u7279\u6027\u90fd\u9002\u5408\u7acb\u523b\u4e0a\u751f\u4ea7&#xff0c;\u6309\u6210\u719f\u5ea6\u5206\u4e09\u6863&#xff1a;<\/p>\n<table>\n<tr>\u6863\u4f4d\u7279\u6027\u5efa\u8bae<\/tr>\n<tbody>\n<tr>\n<td>\u7acb\u523b\u7528<\/td>\n<td>Concepts\u3001Ranges\u3001&lt;&#061;&gt;\u3001std::format\u3001std::span\u3001jthread\u3001consteval<\/td>\n<td>\u6536\u76ca\u5927\u3001\u98ce\u9669\u4f4e<\/td>\n<\/tr>\n<tr>\n<td>\u8c28\u614e\u7528<\/td>\n<td>\u534f\u7a0b<\/td>\n<td>\u6807\u51c6\u5e93\u6ca1\u7ed9\u9ad8\u5c42\u5c01\u88c5&#xff0c;\u9700\u4f9d\u8d56 cppcoro \/ Asio \u7b49<\/td>\n<\/tr>\n<tr>\n<td>\u89c2\u671b\/\u8bd5\u70b9<\/td>\n<td>Modules<\/td>\n<td>\u6784\u5efa\u7cfb\u7edf\u3001IDE\u3001\u7b2c\u4e09\u65b9\u5e93\u751f\u6001\u8fd8\u5728\u8ddf\u4e0a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u7f16\u8bd1\u5668\u6700\u4f4e\u7248\u672c\u53c2\u8003&#xff08;2026 \u89c6\u89d2&#xff09;&#xff1a;<\/p>\n<ul>\n<li>GCC 10&#043;&#xff08;Concepts\/Ranges \u53ef\u7528&#xff0c;Modules \u5efa\u8bae 11&#043;&#xff09;<\/li>\n<li>Clang 13&#043;&#xff08;\u534f\u7a0b\u5b8c\u6574&#xff0c;Modules \u5efa\u8bae 16&#043;&#xff09;<\/li>\n<li>MSVC 2019 16.3&#043;&#xff08;\u6574\u4f53\u652f\u6301\u8f83\u597d&#xff0c;Modules \u5728 VS2022 \u6700\u7a33&#xff09;<\/li>\n<\/ul>\n<hr \/>\n<h3>\u5341\u4e8c\u3001\u4e00\u53e5\u8bdd\u8bb0\u5fc6<\/h3>\n<p>C&#043;&#043;17 \u8ba9\u4f60\u5199\u5f97\u66f4\u8212\u670d&#xff0c;C&#043;&#043;20 \u8ba9\u4f60\u62bd\u8c61\u5f97\u66f4\u5b89\u5168&#xff1a;<\/p>\n<ul>\n<li>Concepts \u628a\u201c\u6a21\u677f\u7ea6\u5b9a\u201d\u53d8\u6210\u4ee3\u7801<\/li>\n<li>Ranges \u628a\u201c\u6570\u636e\u7ba1\u9053\u201d\u53d8\u6210\u4e00\u7b49\u516c\u6c11<\/li>\n<li>\u534f\u7a0b\u628a\u201c\u5f02\u6b65\u72b6\u6001\u673a\u201d\u53d8\u6210\u987a\u5e8f\u5199\u6cd5<\/li>\n<li>\u6a21\u5757\u628a\u201c\u5934\u6587\u4ef6\u5730\u72f1\u201d\u53d8\u6210\u663e\u5f0f\u4f9d\u8d56<\/li>\n<\/ul>\n<p>\u63a5\u4e0b\u6765\u53ef\u4ee5\u628a\u8fd9\u4e9b\u65b0\u7279\u6027\u8f6c\u5316\u4e3a\u66f4\u5b9e\u7528\u7684\u6210\u679c&#xff1a;<\/p>\n<p>\u4e0a\u4e00\u7bc7&#xff1a;C&#043;&#043;14 vs C&#043;&#043;17&#xff1a;\u65b0\u7279\u6027\u5bf9\u6bd4\u4e0e\u7528\u6cd5\u6307\u5357<\/p>\n<hr \/>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261027132437-6ae0a615c409b.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<p><font color=\"blue\">\u4e0d\u79ef\u8dec\u6b65&#xff0c;\u65e0\u4ee5\u81f3\u5343\u91cc\u3002<\/font><\/p>\n<hr \/>\n<p>\u4ee3\u7801\u94f8\u5c31\u661f\u6cb3&#xff0c;\u63a2\u7d22\u6c38\u65e0\u6b62\u5883<\/p>\n<p>\u5728\u8fd9\u7247\u7531\u903b\u8f91\u4e0e\u7b97\u6cd5\u7f16\u7ec7\u7684\u661f\u8fb0\u5927\u6d77\u4e2d&#xff0c;\u6bcf\u4e00\u6b21\u62a5\u9519\u90fd\u662f\u5b87\u5b99\u629b\u6765\u7684\u8c1c\u9898&#xff0c;\u6bcf\u4e00\u6b21\u8c03\u8bd5\u90fd\u662f\u4e0e\u672a\u77e5\u7684\u6df1\u5ea6\u5bf9\u8bdd\u3002\u4e0d\u8981\u56e0\u77ed\u6682\u7684\u201c\u8fd0\u884c\u5931\u8d25\u201d\u800c\u6b62\u6b65&#xff0c;\u56e0\u4e3a\u771f\u6b63\u7684\u5149\u8292&#xff0c;\u5f80\u5f80\u8bde\u751f\u4e8e\u53cd\u590d\u8bd5\u9519\u7684\u6697\u591c\u3002<\/p>\n<p>\u8bf7\u94ed\u8bb0&#xff1a;<\/p>\n<ul>\n<li>\u4f60\u5199\u4e0b\u7684\u6bcf\u4e00\u884c\u4ee3\u7801&#xff0c;\u90fd\u5728\u4e3a\u601d\u7ef4\u953b\u9020\u97e7\u6027&#xff1b;<\/li>\n<li>\u4f60\u7834\u89e3\u7684\u6bcf\u4e00\u4e2aBug&#xff0c;\u90fd\u5728\u4e3a\u8ba4\u77e5\u63a8\u5f00\u65b0\u7684\u95e8\u6249&#xff1b;<\/li>\n<li>\u4f60\u575a\u6301\u7684\u6bcf\u4e00\u5206\u949f&#xff0c;\u90fd\u5728\u4e3a\u672a\u6765\u7684\u98de\u8dc3\u79ef\u84c4\u52bf\u80fd\u3002<\/li>\n<\/ul>\n<p>\u6280\u672f\u7684\u7586\u57df\u6ca1\u6709\u7ec8\u70b9&#xff0c;\u53ea\u6709\u4e0d\u65ad\u5237\u65b0\u7684\u8d77\u70b9\u3002\u65e0\u8bba\u662f\u9012\u5f52\u822c\u7684\u5c42\u5c42\u6311\u6218&#xff0c;\u8fd8\u662f\u5982\u5f02\u6b65\u5e76\u53d1\u7684\u590d\u6742\u56f0\u5c40&#xff0c;\u4f60\u7ec8\u5c06\u4ee5\u8010\u5fc3\u4e3a\u6808\u3001\u4ee5\u597d\u5947\u5fc3\u4e3a\u6307\u9488&#xff0c;\u904d\u5386\u6240\u6709\u53ef\u80fd\u3002<\/p>\n<p>\u5411\u524d\u5427&#xff0c;\u5f00\u53d1\u8005&#xff01; \u8ba9\u4ee3\u7801\u6210\u4e3a\u4f60\u6500\u767b\u7684\u7ef3\u7d22&#xff0c;\u8ba9\u903b\u8f91\u5316\u4f5c\u7167\u4eae\u8ff7\u96fe\u7684\u706f\u5854\u3002\u5f53\u4f60\u5728\u7ec8\u7aef\u770b\u5230\u201cSuccess\u201d\u7684\u77ac\u95f4&#xff0c;\u4fbf\u662f\u5b87\u5b99\u5bf9\u4f60\u575a\u5b9a\u4fe1\u5ff5\u7684\u56de\u54cd\u2014\u2014 \u6b64\u523b\u7684\u6210\u5c31&#xff0c;\u6c38\u8fdc\u53ea\u662f\u4e0b\u4e00\u4e2a\u5947\u8ff9\u7684\u5e8f\u7ae0&#xff01; &#x1f680;<\/p>\n<hr \/>\n<p>&#xff08;\u5c06\u6280\u672f\u6311\u6218\u6bd4\u4f5c\u5b87\u5b99\u63a2\u7d22&#xff0c;\u7528\u4ee3\u7801\u3001\u7b97\u6cd5\u7b49\u610f\u8c61\u5f3a\u5316\u8eab\u4efd\u8ba4\u540c&#xff0c;\u4f20\u9012\u201c\u6301\u7eed\u7a81\u7834\u201d\u7684\u4fe1\u5ff5&#xff0c;\u7ed3\u5c3e\u4ee5\u52a8\u6001\u7b26\u53f7\u6fc0\u53d1\u884c\u52a8\u529b\u3002&#xff09;<\/p>\n<p><span class=\"token comment\">\/\/c&#043;&#043; hello world\u793a\u4f8b<\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span>  <span class=\"token comment\">\/\/ \u5f15\u5165\u8f93\u5165\u8f93\u51fa\u6d41\u5e93<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;Hello World!&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u8f93\u51fa\u5b57\u7b26\u4e32\u5e76\u6362\u884c<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u7a0b\u5e8f\u6b63\u5e38\u9000\u51fa<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token function\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Hello World!&#034;<\/span><span class=\"token punctuation\">)<\/span>  # \u8c03\u7528\u5185\u7f6e\u51fd\u6570\u8f93\u51fa\u5b57\u7b26\u4e32<\/p>\n<p>package main  <span class=\"token comment\">\/\/ \u58f0\u660e\u4e3b\u5305<\/span><\/p>\n<p><span class=\"token comment\">#python hello world\u793a\u4f8b<\/span><br \/>\n<span class=\"token keyword\">import<\/span> <span class=\"token string\">&#034;fmt&#034;<\/span>  <span class=\"token operator\">\/\/<\/span> \u5bfc\u5165\u683c\u5f0f\u5316I<span class=\"token operator\">\/<\/span>O\u5e93<\/p>\n<p><span class=\"token comment\">\/\/go hello world\u793a\u4f8b<\/span><br \/>\n<span class=\"token keyword\">func<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    fmt<span class=\"token punctuation\">.<\/span><span class=\"token function\">Println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Hello World!&#034;<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\">\/\/ \u8f93\u51fa\u5e76\u6362\u884c<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\/\/c# hello world\u793a\u4f8b<br \/>\nusing System;  \/\/ \u5f15\u5165System\u547d\u540d\u7a7a\u95f4<\/p>\n<p>class Program {<br \/>\n    static void Main() {<br \/>\n        Console.WriteLine(&#034;Hello World!&#034;);  \/\/ \u8f93\u51fa\u5e76\u6362\u884c<br \/>\n        Console.ReadKey();  \/\/ \u7b49\u5f85\u6309\u952e&#xff08;\u9632\u6b62\u63a7\u5236\u53f0\u95ea\u9000&#xff09;<br \/>\n    }<br \/>\n}<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u76ee\u5f55C20 vs C17&#xff1a;\u65b0\u7279\u6027\u5bf9\u6bd4\u4e0e\u7528\u6cd5\u6307\u5357\u4e00\u3001\u6a21\u677f\u7ea6\u675f&#xff1a;Concepts\u4e8c\u3001\u6570\u636e\u5904\u7406&#xff1a;Ranges\u4e09\u3001\u534f\u7a0b&#xff1a;Coroutines\u56db\u3001\u6a21\u5757&#xff1a;Modules\u4e94\u3001\u6bd4\u8f83\u8fd0\u7b97\u7b26&#xff1a;  \u98de\u8239\u64cd\u4f5c\u7b26\u516d\u3001\u683c\u5f0f\u5316&#xff1a;std::format\u4e03\u3001\u8fde\u7eed\u5185\u5b58\u89c6\u56fe&#xff1a;std::span\u516b\u3001\u7ebf\u7a0b&#xff1a;std::jthread\u4e5d\u3001\u7f16\u8bd1\u671f\u589e\u5f3a&#xff1a;consteval \/ c<\/p>\n","protected":false},"author":2,"featured_media":118627,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[13178,13452,13453,13454,55,2962],"topic":[],"class_list":["post-118628","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-1024---","tag-c17","tag-13453","tag-13454","tag-c","tag-c20"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C++20 vs C++17\uff1a\u65b0\u7279\u6027\u5bf9\u6bd4\u4e0e\u7528\u6cd5\u6307\u5357 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/118628.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++20 vs C++17\uff1a\u65b0\u7279\u6027\u5bf9\u6bd4\u4e0e\u7528\u6cd5\u6307\u5357 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u76ee\u5f55C20 vs C17&#xff1a;\u65b0\u7279\u6027\u5bf9\u6bd4\u4e0e\u7528\u6cd5\u6307\u5357\u4e00\u3001\u6a21\u677f\u7ea6\u675f&#xff1a;Concepts\u4e8c\u3001\u6570\u636e\u5904\u7406&#xff1a;Ranges\u4e09\u3001\u534f\u7a0b&#xff1a;Coroutines\u56db\u3001\u6a21\u5757&#xff1a;Modules\u4e94\u3001\u6bd4\u8f83\u8fd0\u7b97\u7b26&#xff1a; \u98de\u8239\u64cd\u4f5c\u7b26\u516d\u3001\u683c\u5f0f\u5316&#xff1a;std::format\u4e03\u3001\u8fde\u7eed\u5185\u5b58\u89c6\u56fe&#xff1a;std::span\u516b\u3001\u7ebf\u7a0b&#xff1a;std::jthread\u4e5d\u3001\u7f16\u8bd1\u671f\u589e\u5f3a&#xff1a;consteval \/ c\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/118628.html\" \/>\n<meta property=\"og:site_name\" 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