{"id":309,"date":"2019-04-22T10:34:17","date_gmt":"2019-04-22T02:34:17","guid":{"rendered":"https:\/\/www.caiqinyi.cn\/?p=309"},"modified":"2021-04-24T16:19:48","modified_gmt":"2021-04-24T08:19:48","slug":"pimpl","status":"publish","type":"post","link":"https:\/\/www.caiqinyi.cn\/index.php\/2019\/04\/22\/pimpl\/","title":{"rendered":"PIMPL\u6a21\u5f0f"},"content":{"rendered":"<p>\u4ece\u5e08\u5144\u90a3\u91cc\u5b66\u5230\u7684\u4e00\u79cd\u601d\u60f3\u7b80\u5355\u6709\u6548\u7684\u8bbe\u8ba1\u6a21\u5f0f, PIMPL\u5373Private Implementation\u6216Pointer to Implementation, \u6307\u7684\u662f\u901a\u8fc7\u4e00\u4e2a\u79c1\u6709\u7684\u7c7b\u6210\u5458\u6307\u9488, \u5c06\u6307\u9488\u6240\u6307\u5411\u7684\u7c7b\u7684\u5b9e\u73b0\u9690\u85cf\u8d77\u6765\u3002<\/p>\n<p><!--more--><\/p>\n<p>\u8fd8\u662f\u5148\u4e3e\u4e2a\u6817\u5b50\u53ed~<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"C++\" data-enlighter-theme=\"monokai\">\r\n\/\/A.h\r\nclass A\r\n{\r\npublic:\r\n    void fun();\r\nprivate:\r\n    int i;\r\n};\r\n<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"C++\" data-enlighter-theme=\"monokai\">\r\n\/\/B.h\r\n#include \"A.h\"\r\nclass B\r\n{\r\npublic:\r\n    void fun();\r\nprivate:\r\n    A a; \/\/\u4e0eA\u7684\u5f3a\u8026\u5408\r\n};\r\n<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"C++\" data-enlighter-theme=\"monokai\">\r\n\/\/PIMPL\u505a\u6cd5:\r\n\/\/B.h\r\nclass A; \/\/\u4ee3\u66ff#include \"A.h\"\r\nclass B\r\n{\r\npublic:\r\n    void fun();\r\nprivate:\r\n    A* pImpl;\r\n};\r\n<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"C++\" data-enlighter-theme=\"monokai\">\r\n\/\/B.cpp\r\nB::B()\r\npImpl(new A()){\r\n\r\n}\r\n\r\nB::~B()\r\n{\r\n     delete pImpl;\r\n     pImpl = nullptr;\r\n}\r\n\r\nvoid B::fun()\r\n{\r\n    pImpl->fun();\r\n}\r\n<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"C++\" data-enlighter-theme=\"monokai\">\r\n\/\/main.cpp\r\n#include <B.h>\r\nint main()\r\n{\r\n    B b;\r\n    b.fun();\r\n    return 0;\r\n}\r\n<\/pre>\n<p>\u8fd9\u6837\u505a\u7684\u597d\u5904\u6709:<br \/>\n1) <strong>\u964d\u4f4e\u6a21\u5757\u7684\u8026\u5408; \u964d\u4f4e\u7f16\u8bd1\u4f9d\u8d56, \u63d0\u9ad8\u7f16\u8bd1\u901f\u5ea6.<\/strong> \u56e0\u4e3a\u9690\u85cf\u4e86A\u7684\u5b9e\u73b0, \u88ab\u9690\u85cf\u7684A\u76f8\u5f53\u4e8e\u7c7bB\u662f\u4e0d\u53ef\u89c1\u7684. \u5f53\u6211\u4eec\u5bf9\u9690\u85cf\u7684A\u8fdb\u884c\u4fee\u6539\u65f6, \u662f\u4e0d\u9700\u8981\u91cd\u65b0\u7f16\u8bd1\u7c7bB\u7684.<\/p>\n<p>2) <strong>\u63a5\u53e3\u4e0e\u5b9e\u73b0\u5206\u79bb, \u63d0\u9ad8\u63a5\u53e3\u7684\u7a33\u5b9a\u6027.<\/strong><br \/>\na. \u901a\u8fc7\u6307\u9488\u5c01\u88c5, \u5f53\u5b9a\u4e49new B\u6216B b\u65f6, \u7f16\u8bd1\u5668\u751f\u6210\u7684\u4ee3\u7801\u4e2d\u4e0d\u4f1a\u63ba\u6742A\u7684\u4efb\u4f55\u4fe1\u606f.<br \/>\nb. \u5f53\u4f7f\u7528B\u65f6, \u4f7f\u7528\u7684\u662fB\u7684\u63a5\u53e3(B\u63a5\u53e3\u91cc\u9762\u64cd\u4f5c\u7684\u7c7b\u5176\u5b9e\u662fpImpl\u6210\u5458\u6307\u5411\u7684A\u5bf9\u8c61, \u4e0eA\u65e0\u5173, A\u88ab\u901a\u8fc7\u6307\u9488\u5c01\u88c5\u5f7b\u5e95\u7684\u4e0e\u5b9e\u73b0\u5206\u79bb.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ece\u5e08\u5144\u90a3\u91cc\u5b66\u5230\u7684\u4e00\u79cd\u601d\u60f3\u7b80\u5355\u6709\u6548\u7684\u8bbe\u8ba1\u6a21\u5f0f, PIMPL\u5373Private Implementation\u6216Poi &hellip; <a href=\"https:\/\/www.caiqinyi.cn\/index.php\/2019\/04\/22\/pimpl\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">PIMPL\u6a21\u5f0f<\/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\/309"}],"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=309"}],"version-history":[{"count":6,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts\/309\/revisions"}],"predecessor-version":[{"id":313,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/posts\/309\/revisions\/313"}],"wp:attachment":[{"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/media?parent=309"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/categories?post=309"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.caiqinyi.cn\/index.php\/wp-json\/wp\/v2\/tags?post=309"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}