{"id":1029,"date":"2021-12-22T01:50:13","date_gmt":"2021-12-21T17:50:13","guid":{"rendered":"https:\/\/blog.cauchyschwarz.com\/?p=1029"},"modified":"2021-12-24T00:32:13","modified_gmt":"2021-12-23T16:32:13","slug":"%e6%95%b0%e6%8d%ae%e7%bb%93%e6%9e%84%e4%b8%8e%e7%ae%97%e6%b3%95%e5%88%86%e6%9e%90c%e8%af%ad%e8%a8%80%e6%8f%8f%e8%bf%b0-programming-a-general-overview","status":"publish","type":"post","link":"https:\/\/blog.cauchyschwarz.com\/?p=1029","title":{"rendered":"\u6570\u636e\u7ed3\u6784\u4e0e\u7b97\u6cd5\u5206\u6790C++\u8bed\u8a00\u63cf\u8ff0 Programming: A General Overview"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 ez-toc-wrap-right counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69e5f72f30912\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69e5f72f30912\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#C_Classes\" >C++ Classes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#explicit\" >explicit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#mutable\" >mutable<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#%E5%A3%B0%E6%98%8E%E5%8F%98%E9%87%8F%E6%97%B6%E5%B0%BD%E9%87%8F%E4%BD%BF%E7%94%A8%E8%8A%B1%E6%8B%AC%E5%8F%B7%E5%88%9D%E5%A7%8B%E5%8C%96\" >\u58f0\u660e\u53d8\u91cf\u65f6\u5c3d\u91cf\u4f7f\u7528\u82b1\u62ec\u53f7\u521d\u59cb\u5316<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#%E4%BD%BF%E7%94%A8initializer_list%E5%88%9D%E5%A7%8B%E5%8C%96vector\" >\u4f7f\u7528initializer list\u521d\u59cb\u5316vector<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#C_Details\" >C++ Details<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#%E5%8A%A8%E6%80%81%E5%88%9B%E5%BB%BA%E5%AF%B9%E8%B1%A1\" >\u52a8\u6001\u521b\u5efa\u5bf9\u8c61<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#%E5%B7%A6%E5%80%BC%EF%BC%8C%E5%8F%B3%E5%80%BC%E5%92%8C%E5%BC%95%E7%94%A8\" >\u5de6\u503c\uff0c\u53f3\u503c\u548c\u5f15\u7528<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#%E4%BC%A0%E9%80%92%E5%8F%82%E6%95%B0\" >\u4f20\u9012\u53c2\u6570<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#%E8%BF%94%E5%9B%9E%E5%80%BCReturn_Passing\" >\u8fd4\u56de\u503c(Return Passing)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#std_swap%E4%B8%8Estd_move\" >std::swap\u4e0estd::move<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#The_Big_Five\" >The Big Five<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#destructor\" >destructor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#Copy_Constructor_and_Move_Constructor\" >Copy Constructor and Move Constructor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#Copy_Assignment_and_Move_Assignment_operator\" >Copy Assignment and Move Assignment (operator=)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#big_five5%E4%B8%AA%E5%87%BD%E6%95%B0%E7%9A%84signature%EF%BC%9A\" >big five5\u4e2a\u51fd\u6570\u7684signature\uff1a<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#destructor-2\" >destructor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#copy_constructor\" >copy constructor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#move_constructor\" >move constructor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#copy_assignment_operator\" >copy assignment operator<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/blog.cauchyschwarz.com\/?p=1029\/#move_assignment_operator\" >move assignment operator<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"C_Classes\"><\/span>C++ Classes<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"explicit\"><\/span>explicit<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u5bf9\u4e8e\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\uff0c\u5e94\u8be5\u5c06\u5176\u58f0\u660e\u4e3aexplicit\uff0c\u4ee5\u907f\u514d\u9690\u5f0f\u8f6c\u6362\u5e26\u6765\u7684\u96be\u4ee5\u67e5\u627e\u7684BUG\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"mutable\"><\/span>mutable<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>C++\u4e2dmutable\u5173\u952e\u5b57\u5b58\u5728\u7684\u5fc5\u8981\u6027\u662f\u4ec0\u4e48\uff1f &#8211; invalid s\u7684\u56de\u7b54 &#8211; \u77e5\u4e4e https:\/\/www.zhihu.com\/question\/64969053\/answer\/226142449<\/p>\n\n\n\n<p>\u58f0\u660e\u4e3amutable\u7684\u6210\u5458\u53d8\u91cf\uff0c\u53ef\u4ee5\u5728const\u6210\u5458\u51fd\u6570\u4e2d\u88ab\u4fee\u6539\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%A3%B0%E6%98%8E%E5%8F%98%E9%87%8F%E6%97%B6%E5%B0%BD%E9%87%8F%E4%BD%BF%E7%94%A8%E8%8A%B1%E6%8B%AC%E5%8F%B7%E5%88%9D%E5%A7%8B%E5%8C%96\"><\/span>\u58f0\u660e\u53d8\u91cf\u65f6\u5c3d\u91cf\u4f7f\u7528\u82b1\u62ec\u53f7\u521d\u59cb\u5316<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u50cf\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u53ef\u80fd\u672c\u610f\u662f\u60f3\u58f0\u660e\u4e00\u4e2a\u53d8\u91cf\uff0c\u4f46\u5b9e\u9645\u4e0a\u5374\u662f\u58f0\u660e\u4e86\u4e00\u4e2a\u51fd\u6570\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">IntCell obj4();<\/code><\/pre>\n\n\n\n<p>\u800c\u7528\u82b1\u62ec\u53f7\u521d\u59cb\u5316\uff0c\u5219\u6ca1\u6709\u6b67\u4e49\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">IntCell obj4{};<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%BD%BF%E7%94%A8initializer_list%E5%88%9D%E5%A7%8B%E5%8C%96vector\"><\/span>\u4f7f\u7528initializer list\u521d\u59cb\u5316vector<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">vector&lt;int&gt; daysInMonth = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};<\/code><\/pre>\n\n\n\n<p>\u6216\u8005\u4e0d\u9700\u8981\u4f7f\u7528\u7b49\u53f7\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">vector&lt;int&gt; daysInMonth{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};<\/code><\/pre>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"C_Details\"><\/span>C++ Details<span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%8A%A8%E6%80%81%E5%88%9B%E5%BB%BA%E5%AF%B9%E8%B1%A1\"><\/span>\u52a8\u6001\u521b\u5efa\u5bf9\u8c61<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">m = new IntCell();\nm = new IntCell{}; \/\/ C++11\nm = new IntCell;<\/code><\/pre>\n\n\n\n<p>\u4e0a\u8ff03\u79cd\u521b\u5efa\u5bf9\u8c61\u7684\u65b9\u6cd5\u90fd\u53ef\u4ee5\u7528\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%B7%A6%E5%80%BC%EF%BC%8C%E5%8F%B3%E5%80%BC%E5%92%8C%E5%BC%95%E7%94%A8\"><\/span>\u5de6\u503c\uff0c\u53f3\u503c\u548c\u5f15\u7528<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>\u5de6\u503c<\/strong>\uff1a\u6807\u8bc6\u4e86\u4e00\u4e2a\u975e\u4e34\u65f6\u5bf9\u8c61\u7684\u8868\u8fbe\u5f0f\u3002<\/p>\n\n\n\n<p><strong>\u53f3\u503c<\/strong>\uff1a\u6807\u8bc6\u4e86\u4e00\u4e2a\u4e34\u65f6\u5bf9\u8c61\u6216\u8005\u4e0d\u548c\u4efb\u4f55\u5bf9\u8c61\u5173\u8054\u7684\u8868\u8fbe\u5f0f\u3002<\/p>\n\n\n\n<p>\u51fd\u6570\u7684\u8fd4\u56de\u503c\u53ef\u80fd\u662f\u5de6\u503c(\u5982<code>*ptr<\/code>\uff0c<code>arr[x]<\/code>\uff0c<code>cin&gt;&gt;x&gt;&gt;y<\/code>)\uff0c\u4e5f\u53ef\u80fd\u662f\u53f3\u503c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%BC%A0%E9%80%92%E5%8F%82%E6%95%B0\"><\/span>\u4f20\u9012\u53c2\u6570<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>call-by-value<\/p>\n\n\n\n<p>call-by-constant-reference<\/p>\n\n\n\n<p>call-by-lvalue-reference<\/p>\n\n\n\n<p>call-by-rvalue-reference<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%BF%94%E5%9B%9E%E5%80%BCReturn_Passing\"><\/span>\u8fd4\u56de\u503c(Return Passing)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>return-by-value<\/p>\n\n\n\n<p>return-by-reference<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"std_swap%E4%B8%8Estd_move\"><\/span>std::swap\u4e0estd::move<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u901a\u8fc7\u53f3\u503c\u5f15\u7528\u6765\u5b9e\u73b0swap\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">void swap(vector&lt;string&gt; &amp;x, vector&lt;string&gt; &amp;y)\n{\n  vector&lt;string&gt; tmp = static_cast&lt;vector&lt;string&gt;&amp;&amp;&gt;(x);\n  x = static_cast&lt;vector&lt;string&gt;&amp;&amp;&gt;(y);\n  y = static_cast&lt;vector&lt;string&gt;&amp;&amp;&gt;(tmp);\n}<\/code><\/pre>\n\n\n\n<p>\u6216\u8005\u4f7f\u7528<code>move<\/code>\u51fd\u6570\u4e5f\u662f\u4e00\u6837\u7684\u6548\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">void swap(vector&lt;string&gt; &amp;x, vector&lt;string&gt; &amp;y)\n{\n  vector&lt;string&gt; tmp = std::move(x);\n  x = std::move(y);\n  y = std::move(tmp);\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Big_Five\"><\/span>The Big Five<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C++\u4e3a\u6bcf\u4e2a\u7c7b\u63d0\u4f9b\u76845\u4e2a\u5e26\u6709\u9ed8\u8ba4\u5b9e\u73b0\u7684\u51fd\u6570\uff1adestructor\uff0ccopy constructor\uff0cmove constructor\uff0ccopy assignment operator\uff0cmove assignment operator\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"destructor\"><\/span>destructor<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u9ed8\u8ba4\u5b9e\u73b0\u5bf9\u6bcf\u4e2a\u7c7b\u6210\u5458\u8c03\u7528\u6790\u6784\u51fd\u6570\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Copy_Constructor_and_Move_Constructor\"><\/span>Copy Constructor and Move Constructor<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u7528\u4e8e\u5728\u58f0\u660e\u4e00\u4e2a\u5bf9\u8c61\u7684\u65f6\u5019\uff0c\u5c06\u8fd9\u4e2a\u5bf9\u8c61\u521d\u59cb\u5316\u4e3a\u53e6\u4e00\u4e2a\u5bf9\u8c61\u6240\u5904\u7684\u72b6\u6001\u3002\u5982\u679c\u53e6\u4e00\u4e2a\u5bf9\u8c61\u662f\u5de6\u503c\uff0c\u90a3\u4e48\u8c03\u7528\u7684\u662fCopy Constructor\uff0c\u5982\u679c\u53e6\u4e00\u4e2a\u5bf9\u8c61\u662f\u53f3\u503c\uff0c\u90a3\u4e48\u8c03\u7528\u7684\u662fMove Constructor\u3002<\/p>\n\n\n\n<p>\u67093\u79cd\u5e94\u7528\u573a\u666f\uff0c<\/p>\n\n\n\n<p>1.\u58f0\u660e\u7684\u65f6\u5019\uff1b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">IntCell B = C;\nIntCell B{C};<\/code><\/pre>\n\n\n\n<p>\u4e0a\u9762\u4e24\u79cd\u58f0\u660e\u65b9\u5f0f\u7b49\u4ef7\u3002<\/p>\n\n\n\n<p>2.\u4f5c\u4e3a\u51fd\u6570\u7684\u53c2\u6570\u5e76\u4e14\u4f7f\u7528\u503c\u4f20\u9012\u7684\u65f6\u5019(\u4e0d\u80fd\u662f\u901a\u8fc7\u5f15\u7528\u4f20\u9012\u53c2\u6570)\uff1b<\/p>\n\n\n\n<p>3.\u4f5c\u4e3a\u51fd\u6570\u7684\u8fd4\u56de\u503c\u5e76\u4e14\u662freturn by value(\u4e0d\u80fd\u662f\u8fd4\u56de\u5f15\u7528)\uff1b<\/p>\n\n\n\n<p>copy constructord\u7684\u9ed8\u8ba4\u5b9e\u73b0\u5bf9\u7c7b\u6210\u5458\u4f9d\u6b21\u8c03\u7528\u5404\u81ea\u7684copy constructor\u3002<\/p>\n\n\n\n<p>move contructor\u7684\u9ed8\u8ba4\u5b9e\u73b0\u5bf9\u7c7b\u6210\u5458\u4f9d\u6b21\u8c03\u7528copy constructor\u6216\u8005move constructor(\u5982\u679c\u76f8\u5e94\u7684\u7c7b\u6210\u5458\u5177\u6709move constructor)\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Copy_Assignment_and_Move_Assignment_operator\"><\/span>Copy Assignment and Move Assignment (operator=)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u5bf9\u4e8e<code>lhs=rhs<\/code>\u8fd9\u79cd\u8868\u8fbe\u5f0f\uff0c\u5982\u679crhs\u662f\u5de6\u503c\uff0c\u90a3\u4e48\u5c31\u8c03\u7528copy assignment operator\uff0c\u5982\u679crhs\u662f\u53f3\u503c\uff0c\u90a3\u4e48\u5c31\u8c03\u7528move assignment operator\u3002<\/p>\n\n\n\n<p>copy assignment operator\u7684\u9ed8\u8ba4\u5b9e\u73b0\u5bf9\u7c7b\u7684\u6bcf\u4e00\u4e2a\u6210\u5458\u8c03\u7528\u5176\u76f8\u5e94\u7684copy assignment operator\u3002<\/p>\n\n\n\n<p>move assignment operator\u7684\u9ed8\u8ba4\u5b9e\u73b0\u5bf9\u7c7b\u6210\u5458\u8c03\u7528copy assignment operator\u6216\u8005move assignment operator(\u5982\u679c\u76f8\u5e94\u7684\u7c7b\u6210\u5458\u5177\u6709move assignment operator)\u3002<\/p>\n\n\n\n<p>\u5bf9\u4e8ebig five\u76845\u4e2a\u51fd\u6570\uff0c\u8981\u4e48\u5c31\u90fd\u7528\u9ed8\u8ba4\u7684\uff0c\u8981\u4e48\u5c31\u91cd\u5199\u5176\u4e2d\u7684\u67d0\u4e9b\u51fd\u6570\u5e76\u5c06\u5176\u4f59\u7684\u6807\u8bb0\u4e3a<strong>default<\/strong>\u6216\u8005<strong>delete<\/strong>\u3002<\/p>\n\n\n\n<p>copy assignment operator\u5e38\u6309\u7167<a href=\"https:\/\/stackoverflow.com\/questions\/3279543\/what-is-the-copy-and-swap-idiom\" data-type=\"URL\" data-id=\"https:\/\/stackoverflow.com\/questions\/3279543\/what-is-the-copy-and-swap-idiom\">copy and swap idiom<\/a>\u5b9e\u73b0\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"big_five5%E4%B8%AA%E5%87%BD%E6%95%B0%E7%9A%84signature%EF%BC%9A\"><\/span>big five5\u4e2a\u51fd\u6570\u7684signature\uff1a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"destructor-2\"><\/span>destructor<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"cpp\" class=\"language-cpp\">~ class-name ();\t\nvirtual ~ class-name ();\t\ndecl-specifier-seq(optional) ~ class-name () = default;\t\/\/ since c++11\ndecl-specifier-seq(optional) ~ class-name () = delete;\t\/\/ since c++11\nattr(optional) decl-specifier-seq(optional) id-expression ( void(optional) ) except(optional) attr(optional) requires-clause(optional);\t\/\/ since c++20<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"copy_constructor\"><\/span>copy constructor<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"cpp\" class=\"language-cpp\">class-name ( const class-name &amp; );\nclass-name ( const class-name &amp; ) = default;\t\/\/ since c++11\nclass-name ( const class-name &amp; ) = delete;     \/\/ since c++11<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"move_constructor\"><\/span>move constructor<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"cpp\" class=\"language-cpp\">class-name ( class-name &amp;&amp; );\nclass-name ( class-name &amp;&amp; ) = default;\t\nclass-name ( class-name &amp;&amp; ) = delete;\t<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"copy_assignment_operator\"><\/span>copy assignment operator<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"cpp\" class=\"language-cpp\">class-name &amp; class-name :: operator= ( class-name );\nclass-name &amp; class-name :: operator= ( const class-name &amp; );\nclass-name &amp; class-name :: operator= ( const class-name &amp; ) = default;\t\/\/ since c++11\nclass-name &amp; class-name :: operator= ( const class-name &amp; ) = delete;  \/\/ since c++11<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"move_assignment_operator\"><\/span>move assignment operator<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"cpp\" class=\"language-cpp\">class-name &amp; class-name :: operator= ( class-name &amp;&amp; );\nclass-name &amp; class-name :: operator= ( class-name &amp;&amp; ) = default;\t\nclass-name &amp; class-name :: operator= ( class-name &amp;&amp; ) = delete;\t<\/code><\/pre>\n\n\n\n<p>\u5b9e\u73b0move assignment operator\u6216\u8005move constructor\u4f1a\u5bfc\u81f4copy assignment operator\u548ccopy constructor\u7684\u9ed8\u8ba4\u5b9e\u73b0\u88ab\u5220\u9664\uff1b<\/p>\n\n\n\n<p>\u540c\u6837\u5b9e\u73b0copy assignment operator\u548ccopy constructor\u4e5f\u4f1a\u5bfc\u81f4move assignment operator\u548cmove constructor\u7684\u9ed8\u8ba4\u5b9e\u73b0\u88ab\u5220\u9664\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C++ Classes explicit \u5bf9\u4e8e\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\uff0c\u5e94\u8be5\u5c06\u5176\u58f0\u660e\u4e3aexplicit\uff0c\u4ee5\u907f\u514d\u9690\u5f0f\u8f6c\u6362\u5e26\u6765\u7684\u96be\u4ee5\u67e5\u627e\u7684BUG\u3002 mutable C++\u4e2dmutable\u5173\u952e\u5b57\u5b58\u5728\u7684\u5fc5\u8981\u6027\u662f&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,6],"tags":[9],"class_list":["post-1029","post","type-post","status-publish","format-standard","hentry","category-10","category-6","tag-9"],"_links":{"self":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/1029","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1029"}],"version-history":[{"count":5,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/1029\/revisions"}],"predecessor-version":[{"id":1037,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=\/wp\/v2\/posts\/1029\/revisions\/1037"}],"wp:attachment":[{"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1029"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1029"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.cauchyschwarz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1029"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}