{"id":326140,"date":"2021-02-05T16:49:08","date_gmt":"2021-02-05T08:49:08","guid":{"rendered":"http:\/\/4563.org\/?p=326140"},"modified":"2021-02-05T16:49:08","modified_gmt":"2021-02-05T08:49:08","slug":"c%e4%b8%ad%e5%bc%95%e7%94%a8%e5%92%8c%e6%99%ba%e8%83%bd%e6%8c%87%e9%92%88%e7%9a%84%e7%ae%80%e5%8d%95%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=326140","title":{"rendered":"c++\u4e2d\u5f15\u7528\u548c\u667a\u80fd\u6307\u9488\u7684\u7b80\u5355\u95ee\u9898"},"content":{"rendered":"
\n
\n
\n

c++\u4e2d\u5f15\u7528\u548c\u667a\u80fd\u6307\u9488\u7684\u7b80\u5355\u95ee\u9898 <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : ruokw <\/span> <\/i> 2<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
\u4f20\u5165\u5bf9\u8c61\u5f15\u7528\uff0c\u4f8b\u5982 json-value \uff08 A \uff09\u3002\u73b0\u5728\u60f3\u628a\u5b83\u5305\u88c5\u6210\u65b0\u5bf9\u8c61\uff08 B{A}\uff09\u8fd4\u56de\uff0c\u4f46\u662f\u5e95\u5c42\u6307\u5411\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002\u800c\u4e14 B \u8981\u652f\u6301\u65e0\u53c2\u6784\u9020\u3002\u4f7f\u7528\u667a\u80fd\u6307\u9488\u53bb\u5305\u88c5 A \u4f1a\u51fa\u73b0\u8d85\u8fc7\u57df\u540e\u8fc7\u65e9\u91ca\u653e\u7a7a\u95f4\u7684\u95ee\u9898\u3002\u60f3\u95ee\u4e0b\u8fd9\u79cd\u60c5\u51b5\u4e0b\u6709\u4ec0\u4e48\u597d\u7684\u89e3\u51b3\u65b9\u6cd5\u5417\uff1f <\/div>\n
\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (23<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : yianing <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u90a3\u5728\u6709\u53c2\u6784\u9020\u7684\u65f6\u5019\u4f20\u5165\u667a\u80fd\u6307\u9488\u7684\u62f7\u8d1d\u4e0d\u5c31\u884c\u4e86\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : ruokw <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @yianing \u73b0\u5728\u95ee\u9898\u662f A \u5e94\u8be5\u662f\u5728 B \u4e4b\u540e\u624d\u4f1a\u88ab\u91ca\u653e\uff0c\u4f46\u662f B \u4fdd\u5b58 A \u7684\u667a\u80fd\u6307\u9488\uff0c\u5728 B \u6b7b\u4ea1\u65f6\u4f1a\u63d0\u524d\u91ca\u653e\u6389 A \u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : yianing <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ruokw B \u6b7b\u4ea1\u65f6\u53ea\u4f1a\u5c06 A \u7684\u5f15\u7528\u6570\u51cf\u4e00\uff0c\u5e76\u4e0d\u4f1a\u91ca\u653e\u6389\u6307\u9488\u6307\u5411\u7684\u5185\u5b58\u5427\uff0c\u53ea\u6709\u5f15\u7528\u6570\u53d8\u4e3a 0 \u7684\u65f6\u5019\u624d\u4f1a\u771f\u6b63\u91ca\u653e\u5185\u5b58 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : wutiantong <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u6ca1\u6709\u63cf\u8ff0\u6e05\u695a\u4f60\u7684\u95ee\u9898 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : ruokw <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wutiantong \u8865\u5145\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : ruokw <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @yianing \u8865\u5145\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : wevsty <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u9996\u5148\u628a\u4f20\u5165\u7684\u5f15\u7528\u8f6c\u6362\u4e3a\u667a\u80fd\u6307\u9488\u662f\u4e00\u79cd\u5f3a\u70c8\u4e0d\u63a8\u8350\u7684\u505a\u6cd5\u3002
    \u5176\u6b21\uff0cshared_ptr \u5728\u8d85\u8fc7\u751f\u5b58\u5468\u671f\u7684\u65f6\u5019\u4f1a\u81ea\u52a8\u5bf9\u5f15\u7528\u8ba1\u6570\u51cf 1\uff0c\u5982\u679c\u5f15\u7528\u8ba1\u6570\u4e3a 0 \u5c31\u4f1a\u53bb delete \u7ba1\u7406\u7684\u5bf9\u8c61\u3002\u5982\u679c\u4e0d\u60f3 shared_ptr \u6307\u9488\u53bb delete \u8fd9\u4e2a\u5bf9\u8c61\uff0c\u8981\u4e0d\u7136\u589e\u52a0\u5f15\u7528\u8ba1\u6570\uff0c\u8981\u4e0d\u7136\u5c31\u5ef6\u957f shared_ptr \u7684\u751f\u5b58\u5468\u671f\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : yianing <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u597d\u5bb6\u4f19\uff0c\u90fd\u7528\u667a\u80fd\u6307\u9488\u4e86\u4e3a\u4ec0\u4e48\u8fd8\u8981\u53bb\u83b7\u53d6\u88f8\u6307\u9488\u5462\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : ruokw <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wevsty \u8fd9\u4e2a\u80fd\u660e\u767d\u3002\u73b0\u5728\u7684\u95ee\u9898\u662f\u5b9e\u9645\u4e0a B \u88ab\u4f5c\u4e3a\u7c7b\u578b\u7684\u96c6\u5408\uff0c\u7528\u6765\u7edf\u4e00\u4e00\u7c7b\u51fd\u6570\u7684\u8fd4\u56de\u7c7b\u578b\uff0cB{int string long A}\uff0c\u5982\u679c B \u91cc\u9762 A \u7528\u5f15\u7528\uff0c\u5c31\u53c8\u610f\u5473\u7740 B \u4e0d\u80fd\u65e0\u53c2\u6784\u9020\u4e86\u3002 \u6240\u4ee5\u73b0\u5728\u6709\u5565\u597d\u7684\u65b9\u6cd5\uff1f \u8fd8\u662f\u8bf4\u53ea\u80fd\u6574\u4e2a\u91cd\u65b0\u8bbe\u8ba1\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : ruokw <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @yianing \u4f60\u662f\u8bf4 shared_ptr(&a)\u4e48\uff1f \u81f3\u5c11\u6211\u73b0\u5728\u5728 mxvc2011 \u91cc\u9762\u5bf9\u5f15\u7528 a \u6784\u9020\u667a\u80fd\u6307\u9488\u8981\u7528&a \u3002\u8fd9\u70b9\u4e5f\u6bd4\u8f83\u96be\u7406\u89e3\uff0c\u4e3a\u5565\u5f15\u7528\u8fd8\u6709\u6307\u9488\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : yianing <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ruokw \u667a\u80fd\u6307\u9488\u521b\u5efa\u7684\u6b63\u786e\u4f7f\u7528\u59ff\u52bf\u662f std::make_shared\uff0c\u4f60\u8fd9\u628a\u4f20\u8fdb\u6765\u7684\u5b9e\u4f8b\u5f15\u7528\u53d6\u5730\u5740\u7edd\u5bf9\u6709\u95ee\u9898\u554a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : imjamespond <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u53ef\u4ee5\u7528 weak ptr \u554a\u3002\u3002\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : ruokw <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @yianing \u8fd9\u4e2a\u4e5f\u80fd\u660e\u767d\uff0c\u4f46\u662f\u73b0\u5728\u60c5\u51b5\u662f B \u4e0d\u4ec5\u5305\u88c5\u5305\u88c5 a \u800c\u662f\u5305\u88c5 a \u7684\u5b50\u5bf9\u8c61\u6bd4\u65b9\u8bf4 a \u662f json::Value ,b=shared_ptr(a[“num”])\u3002 \u8fd9\u65f6\u5019\u53ef\u80fd\u5149 a \u662f\u667a\u80fd\u6307\u9488\u90fd\u4e0d\u591f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : ruokw <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @imjamespond \u7528 weak \u8fd8\u662f\u5f97\u5148\u6709 shared \u54c8\uff0c\u6709 shared \u5c31\u53c8\u56de\u5230\u6700\u521d\u7684\u8bf4\u7684\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : hazardous <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f7f\u7528 shared_ptr \u7b2c\u4e8c\u4e2a\u53c2\u6570\uff1a\u81ea\u5b9a\u4e49 deletor <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : hazardous <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd8\u6709\u4e2a\u95ee\u9898\u662f\u5f88\u96be\u4fdd\u8bc1\u4f20\u5165 A \u7684\u5f15\u7528\u4e00\u5b9a\u662f new \u51fa\u6765\u7684\u5bf9\u8c61\uff0c\u5982\u679c\u662f\u4e2a\u6808\u4e0a\u5bf9\u8c61\u90a3 shared_ptr \u91ca\u653e\u7684\u65f6\u5019\u5c31\u5d29\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : ruokw <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @hazardous \u6211\u628a deletor \u8bbe\u7f6e\u6210\u7a7a\uff0c\u6700\u539f\u59cb\u7684 a \u5728\u6808\u4e0a\uff0c\u73b0\u5728\u53ea\u662f\u8bf4\u7528\u667a\u80fd\u6307\u9488\u4ee3\u66ff\u5f15\u7528\u3002\u5728\u6211\u73b0\u5728\u8fd9\u4e2a\u573a\u666f\u5e94\u8be5\u591f\u7528\u4e86\u3002\u8c22\u8c22\u4f60\u4e86\u54c8 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : wutiantong <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e3b\u8fd9 c++\u7eaf\u5c5e\u778e\u5199\u554a\u3002\u3002\u3002<\/p>\n

    \u9996\u5148\u6211\u4eec\u6709 enable_shared_from_this \uff08 https:\/\/en.cppreference.com\/w\/cpp\/memory\/enable_shared_from_this \uff09\uff0c
    \u5176\u6b21\u6211\u4eec\u6709 aliasing constructor for shared_ptr \uff08 https:\/\/en.cppreference.com\/w\/cpp\/memory\/shared_ptr\/shared_ptr #8 \uff09 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : mainjzb <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    ..\u4f60\u5df2\u7ecf\u628a\u751f\u6b7b\u6743\u4ea4\u7ed9 b \u4e86\u3002
    \u6240\u4ee5 b \u6b7b\u4e86\uff0c\u62c9\u7740 a \u4e00\u8d77\u6b7b\u5f88\u6b63\u5e38\u3002
    \u4e0d\u60f3\u4ea4\u7ed9 b \u5c31\u7528\u666e\u901a\u6307\u9488\u3002\u6240\u4ee5\u7528\u667a\u80fd\u6307\u9488\u7684\u610f\u4e49\u4f55\u5728\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : ruokw <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @wutiantong \u54c8\u54c8 \u65b0\u624b\u4e0a\u8def\u561b\uff0c\u6211\u770b\u770b\u4f60\u8bf4\u7684\u54c8 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : mainjzb <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8981\u4e48 a \u4ece\u4e00\u5f00\u59cb\u5c31\u7528 share \u6307\u9488\u3002
    \u8981\u4e48\u81ea\u5df1\u7ba1\u7406\uff0c\u90fd\u4e0d\u7528\u667a\u80fd\u6307\u9488 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : ruokw <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @mainjzb \u540e\u6765\u60f3\u60f3\u4e5f\u662f\u3002\u3002\u3002\u8822\u4e86\u2570(*\u00b4\ufe36`*)\u256f \u54c8\u54c8 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : nicebird <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u521d\u5b66\u8005\u5427\uff0c\u4f4e\u7ea7\u9519\u8bef\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    c++\u4e2d\u5f15\u7528\u548c\u667a\u80fd\u6307\u9488\u7684\u7b80\u5355\u95ee\u9898 …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/326140"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=326140"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/326140\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=326140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=326140"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=326140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}