{"id":164,"date":"2019-05-17T21:55:15","date_gmt":"2019-05-18T01:55:15","guid":{"rendered":"https:\/\/andybase.com\/?p=164"},"modified":"2019-05-17T22:56:02","modified_gmt":"2019-05-18T02:56:02","slug":"%e6%89%80%e6%9c%89%e6%9d%83%e4%b8%8e%e6%99%ba%e8%83%bd%e6%8c%87%e9%92%88","status":"publish","type":"post","link":"https:\/\/andybase.com\/?p=164","title":{"rendered":"\u6240\u6709\u6743\u4e0e\u667a\u80fd\u6307\u9488"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u6ca1\u9519\uff0c\u6280\u672f\u535a\u4e3b\u5f00\u59cb\u5199\u6280\u672f\u6587\u4e86<\/p><\/blockquote>\n\n\n\n<p>\u4ece\u6211\u5f00\u59cb\u5b66C\/C++\u7684\u65f6\u5019\uff0c\u6307\u9488\u548c\u5185\u5b58\u7ba1\u7406\u5c31\u662f\u6700\u8ba9\u6211\u5934\u75bc\u7684\u4e1c\u897f\uff1a\u8981\u4e48\u662f\u5fd8\u4e86\u91ca\u653e\u5185\u5b58\u9020\u6210\u5185\u5b58\u6cc4\u9732\uff0c\u8981\u4e48\u662f\u591a\u91cd\u91ca\u653e\u9020\u6210\u4e86\u8bbf\u95ee\u5931\u8d25\u3002\u751a\u81f3\u6709\u4e9b\u65f6\u5019\u4e00\u4e2a\u65b9\u6cd5\u6709\u591a\u4e2a\u8fd4\u56de\u8bed\u53e5\u7684\u65f6\u5019\u8fd8\u8981\u5728\u6bcf\u4e00\u4e2a\u8fd4\u56de\u8bed\u53e5\u524d\u91ca\u653e\u4e00\u4e0b\u5185\u5b58\u3002\u5f53\u65f6\u5c31\u5728\u60f3\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u50cfJava\u4e00\u6837\u6709\u4e00\u4e2a\u667a\u80fd\u7684\u5783\u573e\u56de\u6536\u5668\uff0c\u6765\u7ba1\u7406\u6240\u6709\u7684\u5185\u5b58\u5462\u3002<\/p>\n\n\n\n<p>\u8fd9\u4e2a<em>\u75db\u70b9<\/em>\u4e00\u76f4\u56f0\u6270\u5230\u6211\u5f00\u59cb\u5b66STL\u3002\u539f\u6765STL\u65e9\u5c31\u8003\u8651\u5230\u624b\u52a8\u91ca\u653e\u5185\u5b58\u7684\u7e41\u7410\uff0c\u6240\u4ee5\u63d0\u4f9b\u4e86\u591a\u79cd\u667a\u80fd\u6307\u9488\uff1a<del><code>auto_ptr<\/code><\/del>, <code>unique_ptr<\/code>, <code>shared_ptr<\/code>, <code>weak_ptr<\/code>\uff0c\u5e76\u5f15\u5165\u4e86\u201c\u6240\u6709\u6743\u201d\u8fd9\u4e2a\u6982\u5ff5\u3002\u5927\u5927\u7b80\u5316\u4e86\u5de5\u7a0b\u9879\u76ee\u4e2d\u7684\u5185\u5b58\u7ba1\u7406\u3002\u4e5f\u8ba9\u6211\u610f\u8bc6\u5230\u6211\u5b66\u7684\u662f\u5047C++\uff0c\u771fC\uff08\u83dc\uff09\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6240\u6709\u6743<\/h4>\n\n\n\n<h5 class=\"wp-block-heading\">\u5355\u4e00\u6240\u6709\u6743<\/h5>\n\n\n\n<p>\u4e24\u53e5\u8bdd\uff1a\u6240\u6709\u6743\u7684\u62e5\u6709\u8005<strong>\u6709\u4e49\u52a1\u91ca\u653e\u5185\u5b58<\/strong>\u6216\u8f6c\u79fb\u6240\u6709\u6743\u3002\u540c\u4e00\u65f6\u523b\u53ea\u4f1a\u6709\u4e00\u4e2a\u6240\u6709\u6743\u62e5\u6709\u8005\u3002<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">\u5171\u4eab\u6240\u6709\u6743<\/h5>\n\n\n\n<p>\u548c\u7528\u88f8\u6307\u9488\u4e00\u6837\uff0c\u6240\u6709\u6743\u7684\u62e5\u6709\u8005<strong>\u4e0d\u5fc5<\/strong>\u8d1f\u8d23\u91ca\u653e\u5185\u5b58\uff0c\u5f15\u7528\u8ba1\u6570\u5668\u4f1a\u8d1f\u8d23\u91ca\u653e\u5185\u5b58\u3002\u540c\u4e00\u65f6\u523b\u53ef\u4ee5\u6709\u591a\u4e2a\u6240\u6709\u6743\u62e5\u6709\u8005\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">unique_ptr<\/h4>\n\n\n\n<p>\u91cd\u8981\u7684\u4e8b\u60c5\u8bf4\u4e09\u904d\uff1a<\/p>\n\n\n\n<p><code>unique_ptr<\/code> \u4e0d\u80fd\u88ab\u62f7\u8d1d<\/p>\n\n\n\n<p><code>unique_ptr<\/code> \u4e0d\u80fd\u88ab\u62f7\u8d1d<\/p>\n\n\n\n<p><code>unique_ptr<\/code> \u4e0d\u80fd\u88ab\u62f7\u8d1d<\/p>\n\n\n\n<p><code>unique_ptr<\/code> \u7684\u6240\u6709\u8005\u5373\u4e3a\u5355\u4e00\u6240\u6709\u6743\u7684\u62e5\u6709\u8005\uff0c<strong>\u56e0\u6b64\u5b83\u65e0\u6cd5\u88ab\u62f7\u8d1d<\/strong>\u3002\u5982\u679c\u9700\u8981\u8f6c\u79fb\u6240\u6709\u6743\uff0c\u9700\u8981\u663e\u793a\u8c03\u7528 <code>move(unique_ptr)<\/code> \u6765\u8f6c\u79fb \u6216\u8005 <code>unqie_ptr.release()<\/code> \u65b9\u6cd5\u653e\u5f03\u6240\u6709\u6743\u3002\u5728\u751f\u547d\u5468\u671f\u7ed3\u675f\u65f6\uff0c\u82e5 <code>unique_ptr<\/code> \u4f9d\u7136\u662f\u6240\u6709\u6743\u7684\u62e5\u6709\u8005\uff0c\u5b83\u4f1a\u7acb\u523b\u91ca\u653e\u6389\u5bf9\u5e94\u7684\u8d44\u6e90\u3002\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-syntaxhighlighter-code\">unique_ptr&lt;A> a = make_unique&lt;A>();\nunique_ptr&lt;A> b = a; \/\/ can not assign unique_ptr to other unique_ptr\nunique_ptr&lt;A> c(a);  \/\/ can not copy unique_ptr\nunique_ptr&lt;A> d(a.release()); \/\/ OK, a release the resource\nunique_ptr&lt;A> e = move(a); \/\/ OK, a transfer ownership to e<\/pre>\n\n\n\n<p>\u4e0e\u88f8\u6307\u9488\u4e0d\u540c\uff0c\u5355\u4e00\u6240\u6709\u6743\u660e\u786e\u4e86\u8d44\u6e90\u7684\u6240\u6709\u8005\uff0c\u786e\u5b9a\u4e86\u8d44\u6e90\u8be5\u4e8e\u4f55\u65f6\u88ab\u91ca\u653e\uff0c\u589e\u5f3a\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002\u5f53\u7136\uff0c\u4f20\u9012 <code>unique_ptr<\/code> \u5f15\u7528\u8fd9\u79cd\u5408\u6cd5\u4e0d\u5408\u7406\u7684\u4e8b\u4e5f\u522b\u5e72\uff0c\u8981\u4e48\u76f4\u63a5 <code>move<\/code> \u8fc7\u53bb\uff0c\u8981\u4e48\u53ea\u63d0\u4f9b <code>unique_ptr.get()<\/code> \u4f46\u4e0d\u8f6c\u79fb\u6240\u6709\u6743\u3002<\/p>\n\n\n\n<p>\u5c0f\u60ca\u559c\uff1a\u8bd5\u8bd5 <code>std::set&lt;unique_ptr&gt;<\/code>\uff0c\u6709\u60ca\u559c\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">shared_ptr<\/h4>\n\n\n\n<p><code>shared_ptr<\/code> \u5728\u4f7f\u7528\u4e0a\u66f4\u50cf\u88f8\u6307\u9488\uff0c\u4e0d\u540c\u7684\u5730\u65b9\u5c31\u662f\u5b83\u5185\u90e8\u6709\u4e00\u4e2a\u5f15\u7528\u8ba1\u6570\u5668\uff0c\u8bb0\u5f55\u4e86\u6709\u591a\u5c11\u5171\u4eab\u6240\u6709\u6743\u7684\u62e5\u6709\u8005\u3002\u5f53\u8ba1\u6570\u5f52\u96f6\uff0c\u5b83\u4f1a\u81ea\u52a8\u91ca\u653e\u6389\u8d44\u6e90\u3002\u5b83\u7684\u4f18\u52bf\u662f\u6bd4 <code>unique_ptr<\/code> \u66f4\u7075\u6d3b\uff0c\u5728\u5f88\u591a\u9700\u8981\u5171\u4eab\u8d44\u6e90\u7684\u573a\u666f\uff08\u6bd4\u5982\u591a\u7ebf\u7a0b\u5171\u4eab\u7269\u4ef6\uff09\uff0c\u5b83\u7b26\u5408\u573a\u666f\u7684\u9700\u6c42\u3002\u5e76\u4e14\u6d3b\u7528 <code>shared_ptr<\/code> \u7684<strong>\u6700\u540e\u8d70\u7684\u4eba\u5173\u95e8<\/strong>\u7279\u6027\uff0c\u5728\u67d0\u4e9b\u591a\u7ebf\u7a0b\u5e94\u7528\u7684\u573a\u666f\u91cc\u53ef\u4ee5\u5b9e\u73b0\u4f1a\u8bdd\u7ed3\u675f\u901a\u77e5\uff0c\u66f4\u65b0\u6807\u8bb0\u7b49\u529f\u80fd\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5f69\u86cb\uff1a<\/h4>\n\n\n\n<p><code>const unique_ptr&lt;T&gt; &amp;<\/code> make the world a <del>better<\/del> place <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6ca1\u9519\uff0c\u6280\u672f\u535a\u4e3b\u5f00\u59cb\u5199\u6280\u672f\u6587\u4e86 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\u8fd9\u4e2a\u75db\u70b9\u4e00\u76f4\u56f0\u6270\u5230\u6211\u5f00\u59cb\u5b66STL\u3002\u539f\u6765STL\u65e9\u5c31\u8003\u8651\u5230\u624b\u52a8\u91ca\u653e\u5185\u5b58\u7684\u7e41\u7410\uff0c\u6240\u4ee5\u63d0\u4f9b\u4e86\u591a\u79cd\u667a\u80fd\u6307\u9488\uff1aauto_ptr, unique_ptr, shared_ptr, weak_ptr\uff0c\u5e76\u5f15\u5165\u4e86\u201c\u6240\u6709\u6743\u201d\u8fd9\u4e2a\u6982\u5ff5\u3002\u5927\u5927\u7b80\u5316\u4e86\u5de5\u7a0b\u9879\u76ee\u4e2d\u7684\u5185\u5b58\u7ba1\u7406\u3002\u4e5f\u8ba9\u6211\u610f\u8bc6\u5230\u6211\u5b66\u7684\u662f\u5047C++\uff0c\u771fC\uff08\u83dc\uff09\u3002 \u6240\u6709\u6743 \u5355\u4e00\u6240\u6709\u6743 \u4e24\u53e5\u8bdd\uff1a\u6240\u6709\u6743\u7684\u62e5\u6709\u8005\u6709\u4e49\u52a1\u91ca\u653e\u5185\u5b58\u6216\u8f6c\u79fb\u6240\u6709\u6743\u3002\u540c\u4e00\u65f6\u523b\u53ea\u4f1a\u6709\u4e00\u4e2a\u6240\u6709\u6743\u62e5\u6709\u8005\u3002 \u5171\u4eab\u6240\u6709\u6743 \u548c\u7528\u88f8\u6307\u9488\u4e00\u6837\uff0c\u6240\u6709\u6743\u7684\u62e5\u6709\u8005\u4e0d\u5fc5\u8d1f\u8d23\u91ca\u653e\u5185\u5b58\uff0c\u5f15\u7528\u8ba1\u6570\u5668\u4f1a\u8d1f\u8d23\u91ca\u653e\u5185\u5b58\u3002\u540c\u4e00\u65f6\u523b\u53ef\u4ee5\u6709\u591a\u4e2a\u6240\u6709\u6743\u62e5\u6709\u8005\u3002 unique_ptr \u91cd\u8981\u7684\u4e8b\u60c5\u8bf4\u4e09\u904d\uff1a unique_ptr \u4e0d\u80fd\u88ab\u62f7\u8d1d unique_ptr \u4e0d\u80fd\u88ab\u62f7\u8d1d unique_ptr \u4e0d\u80fd\u88ab\u62f7\u8d1d unique_ptr [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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