{"id":130,"date":"2017-06-08T01:18:09","date_gmt":"2017-06-07T17:18:09","guid":{"rendered":"http:\/\/kogasa.moe\/?p=130"},"modified":"2019-05-14T00:42:04","modified_gmt":"2019-05-13T16:42:04","slug":"%e8%bd%af%e4%bb%b6%e4%b8%ad%e5%87%ba%e7%8e%b0%e7%ba%af%e8%99%9a%e5%87%bd%e6%95%b0%e8%a2%ab%e8%b0%83%e7%94%a8%e7%9a%84%e9%94%99%e8%af%af","status":"publish","type":"post","link":"https:\/\/flandre-scarlet.moe\/blog\/130\/","title":{"rendered":"\u8f6f\u4ef6\u4e2d\u51fa\u73b0\u7eaf\u865a\u51fd\u6570\u88ab\u8c03\u7528\u7684\u9519\u8bef"},"content":{"rendered":"<p>\u6211\u7684\u60c5\u51b5\u662f\u9000\u51fa\u8f6f\u4ef6\u65f6\u5076\u5c14\u4ea7\u751f\u8fd9\u79cd\u9519\u8bef\uff0c\u4e5f\u7b97\u662f\u591a\u7ebf\u7a0b\u4e2d\u7684\u4e00\u4e2a\u4f7f\u7528\u4e0d\u5f53\u7684\u60c5\u51b5\u3002<br \/>\n\u7b80\u5316\u540e\u7684\u6a21\u578b\u5982\u4e0b\uff1a<br \/>\n<!--more--><\/p>\n<pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\r\nclass A\r\n{\r\npublic:\r\n    virtual void vf() = 0;\r\n    void fa() {\r\n        vf();\r\n    }\r\n    ~A() {\r\n        fa();\r\n    }\r\nprivate:\r\n    Thread *thread;\r\n};\r\n\r\nclass AA : public A\r\n{\r\n    virtual void vf() { \/*do something*\/ }\r\n};\r\n\r\nint main()\r\n{\r\n    AA *aa = new AA;\r\n    delete aa;\r\n    return 0;\r\n}\r\n<\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/flandre-scarlet.moe\/blog\/wp-content\/uploads\/2017\/06\/pv-func-call.png\" alt=\"PureVirtualFuncCall\" \/><br \/>\n\u6ca1\u9519\u5c31\u662f\u5728\u57fa\u7c7b\u7684\u6784\u9020\/\u6790\u6784\u51fd\u6570\u4e2d\u5bf9\u865a\u51fd\u6570\u8fdb\u884c\u4e86\u8c03\u7528\u3002\u5b9e\u9645\u7684\u60c5\u51b5\u662f\uff1a\u7ebf\u7a0bT1\u548cT2\u6301\u6709\u540c\u4e00\u4e2aAA\u5bf9\u8c61\u7684\u6307\u9488\uff0c\u5f53T1\u5728\u5bf9AA\u8fdb\u884c\u6790\u6784\uff0c\u6267\u884c\u5230A::~A()\u4e2d\u65f6\uff0cT2\u8fd8\u5728\u8dd1\u7740AA::vf()\uff0c\u56e0\u4e3a\u4e00\u65e6\u8fdb\u5165A::~A()\u540e\uff0c\u5bf9\u8c61\u7684\u865a\u8868\u6307\u9488\u5df2\u7ecf\u88ab\u91cd\u65b0\u6307\u5411\u4e86\u57fa\u7c7bA\u7684\u865a\u8868\uff0c\u4e0d\u518d\u662fAA\u7684\u4e86\uff0c\u7136\u540e\u5728\u8fd9\u4e2a\u95f4\u9699\u91ccT2\u4ea7\u751f\u4e86\u5bf9vf()\u7684\u8c03\u7528\uff0c\u5c31\u629b\u51fa\u5f02\u5e38\u4e86\u3002<\/p>\n<p>\u9047\u5230\u8fd9\u4e2a\u60c5\u51b5\uff0c\u7b80\u5355\u7684\u505a\u6cd5\u662f\u5148\u5728AA\u6790\u6784\u4e4b\u524d\u5148\u8ba9\u7ebf\u7a0bT2\u7ec8\u6b62\u3002\u7136\u800c\u8f6f\u4ef6\u5c06\u7ebf\u7a0b\u5b89\u7f6e\u5728\u57fa\u7c7b\u4e2d(\u5982\u4e0a\u9762A::thread)\uff0c\u8981\u6c42\u6d3e\u751f\u7c7b\u53bb\u6267\u884c\u505c\u6b62\u7ebf\u7a0b\u52a8\u4f5c\uff0c\u8fd9\u6837\u4fbf\u4f1a\u4f7f\u5f97\u63a5\u53e3\u7684\u6613\u7528\u6027\u4e0b\u964d\uff0c\u56e0\u4e3a\u5f88\u6709\u80fd\u4f1a\u5fd8\u8bb0\u6267\u884c\u4e86\uff0c\u5c31\u8ddf\u5fd8\u8bb0\u91ca\u653e\u5185\u5b58\u4e00\u6837\uff0c\u5728\u4e0d\u77e5\u4e0d\u89c9\u4e2d\u53c8\u5f15\u56de\u4e86\u8fd9\u4e2a\u95ee\u9898\u3002<br \/>\n\u6700\u540e\u8fd8\u662f\u53bb\u6389\u4e86vf\u7684\u7eaf\u865a\u5c5e\u6027\uff0c\u53d8\u6210\u4e00\u4e2a\u5b9e\u73b0\u4e3a\u7a7a\u7684\u666e\u901a\u865a\u51fd\u6570\u4e86\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u7684\u60c5\u51b5\u662f\u9000\u51fa\u8f6f\u4ef6\u65f6\u5076\u5c14\u4ea7\u751f\u8fd9\u79cd\u9519\u8bef\uff0c\u4e5f\u7b97\u662f\u591a\u7ebf\u7a0b\u4e2d\u7684\u4e00\u4e2a\u4f7f\u7528\u4e0d\u5f53\u7684\u60c5\u51b5\u3002 \u7b80\u5316\u540e\u7684\u6a21\u578b\u5982\u4e0b\uff1a&#8230; <\/p>\n<div class=\"read-more navbutton\"><a href=\"https:\/\/flandre-scarlet.moe\/blog\/130\/\">\u9605\u8bfb\u66f4\u591a<i class=\"fa fa-angle-double-right\"><\/i><\/a><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[115,116],"class_list":["post-130","post","type-post","status-publish","format-standard","hentry","category-debug","tag-pure-virtual-function","tag-116"],"_links":{"self":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts\/130","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/comments?post=130"}],"version-history":[{"count":0,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/posts\/130\/revisions"}],"wp:attachment":[{"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/media?parent=130"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/categories?post=130"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/flandre-scarlet.moe\/blog\/wp-json\/wp\/v2\/tags?post=130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}