{"id":271,"date":"2019-02-24T19:27:06","date_gmt":"2019-02-24T11:27:06","guid":{"rendered":"https:\/\/www.caiqinyi.cn\/?p=271"},"modified":"2021-04-24T16:31:42","modified_gmt":"2021-04-24T08:31:42","slug":"weak_ptr","status":"publish","type":"post","link":"https:\/\/www.caiqinyi.cn\/index.php\/2019\/02\/24\/weak_ptr\/","title":{"rendered":"weak_ptr\u7684\u5999\u7528"},"content":{"rendered":"<p>\u9762\u8bd5\u7684\u65f6\u5019\u78b0\u5230\u8fc7\u8fd9\u6837\u4e00\u4e2a\u95ee\u9898: \u5b9a\u4e49\u4e24\u4e2a\u7c7b, \u6bcf\u4e2a\u7c7b\u4e2d\u53c8\u5305\u542b\u4e00\u4e2a\u6307\u5411\u5bf9\u65b9\u7c7b\u578b\u7684\u667a\u80fd\u6307\u9488\u4f5c\u4e3a\u6210\u5458\u53d8\u91cf, \u7136\u540e\u521b\u5efa\u5bf9\u8c61, \u8fd9\u6837\u4f1a\u51fa\u73b0\u4ec0\u4e48\u95ee\u9898?<\/p>\n<p><!--more--><br \/>\n\u5f53\u65f6\u8fd8\u4e0d\u77e5\u9053share_ptr\u7684\u5f15\u7528\u6210\u73af\u95ee\u9898, \u6240\u4ee5\u4e5f\u6ca1\u60f3\u5230\u600e\u4e48\u53bb\u505a, \u60ed\u6127\u2026\u2026 \u540e\u9762\u9762\u8bd5\u5b98\u63d0\u793a\u662f\u7528weak_ptr\u53bb\u89e3\u51b3, \u7279\u6b64\u8bb0\u5f55\u4e00\u4e0b~ \u82e5\u5b9a\u4e49\u4e86\u8fd9\u6837\u4e24\u4e2a\u7c7b,<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"C++\" data-enlighter-theme=\"monokai\">\r\nclass B;\r\nclass A\r\n{\r\npublic:\r\n    void set_ptr(shared_ptr&lt;B&gt;& ptr) { ptr_b = ptr; }\r\nprivate:\r\n    shared_ptr&lt;B&gt; ptr_B;\r\n};\r\n\r\nclass B\r\n{\r\npublic:\r\n    void set_ptr(shared_ptr&lt;A&gt;& ptr) { ptr_a = ptr; }\r\nprivate:\r\n    shared_ptr&lt;A&gt; ptr_A;\r\n};\r\n<\/pre>\n<p>\u7136\u540e\u5206\u522b\u521b\u5efa\u5bf9\u8c61, <\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"C++\" data-enlighter-theme=\"monokai\">\r\nint main(){\r\n    A a;\r\n    B b;\r\n    share_ptr&lt;A&gt; ptr_a(a);\r\n    share_ptr&lt;B&gt; ptr_b(b);\r\n    ptr_a->set_ptr(ptr_b);\r\n    ptr_b->set_ptr(ptr_a);\r\n    return 0;\r\n}\r\n<\/pre>\n<p>\u8fd9\u6837\u51fa\u6765\u7684\u7ed3\u679c\u4f1a\u51fa\u73b0a\u548cb\u4e24\u4e2a\u5bf9\u8c61\u90fd\u65e0\u6cd5\u88ab\u6790\u6784\u7684\u95ee\u9898, \u4e3b\u8981\u662f\u56e0\u4e3a\u5176\u5f15\u7528\u8ba1\u6570\u90fd\u65e0\u6cd5\u51cf\u4e3a0, \u8be6\u7ec6\u5730\u53ef\u4ee5\u770b\u4e00\u4e0b\u8fd9\u7bc7\u535a\u5ba2: https:\/\/blog.csdn.net\/weixin_36750623\/article\/details\/84831969.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9762\u8bd5\u7684\u65f6\u5019\u78b0\u5230\u8fc7\u8fd9\u6837\u4e00\u4e2a\u95ee\u9898: \u5b9a\u4e49\u4e24\u4e2a\u7c7b, \u6bcf\u4e2a\u7c7b\u4e2d\u53c8\u5305\u542b\u4e00\u4e2a\u6307\u5411\u5bf9\u65b9\u7c7b\u578b\u7684\u667a\u80fd\u6307\u9488\u4f5c\u4e3a\u6210\u5458\u53d8\u91cf, \u7136\u540e\u521b\u5efa &hellip; <a href=\"https:\/\/www.caiqinyi.cn\/index.php\/2019\/02\/24\/weak_ptr\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">weak_ptr\u7684\u5999\u7528<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"_links":{"self":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts\/271"}],"collection":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/comments?post=271"}],"version-history":[{"count":6,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts\/271\/revisions"}],"predecessor-version":[{"id":774,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts\/271\/revisions\/774"}],"wp:attachment":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/media?parent=271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/categories?post=271"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/tags?post=271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}