{"id":699,"date":"2021-09-19T20:02:46","date_gmt":"2021-09-19T12:02:46","guid":{"rendered":"https:\/\/swordofmorning.com\/?p=699"},"modified":"2025-10-09T13:55:51","modified_gmt":"2025-10-09T05:55:51","slug":"unique_ptr-as-parameter","status":"publish","type":"post","link":"https:\/\/swordofmorning.com\/index.php\/2021\/09\/19\/unique_ptr-as-parameter\/","title":{"rendered":"std::unique_ptr\u4f5c\u4e3a\u53c2\u6570\u4f20\u5165\u51fd\u6570"},"content":{"rendered":"<p>&emsp;&emsp;\u4ee5unique_ptr\u4f5c\u4e3a\u53c2\u6570\u4f20\u5165\u3001\u4f20\u51fa\u51fd\u6570\u65f6\uff0c\u6709\u4ee5\u4e0b\u4e24\u79cd\u505a\u6cd5\uff1a\u4e00\u662f\u4f20\u5f15\u7528\uff1b\u4e8c\u662f\u79fb\u4ea4\u6240\u6709\u6743\u3002\u4f46\u6ce8\u610f\uff0c\u79fb\u4ea4\u6240\u6709\u6743\u5230\u51fd\u6570\u540e\uff0c\u5982\u679c\u4e0d\u5728\u51fd\u6570\u4e2d\u6790\u6784ptr\uff0c\u90a3\u5c31\u4e00\u5b9a\u9700\u8981\u53d6\u56de\u5b83\uff0c\u5426\u5219\u5185\u5b58\u6cc4\u6f0f\u3002<\/p>\n<pre><code class=\"language-cpp\">#include &lt;iostream&gt;\n#include &lt;memory&gt;\n\nint asRef(std::unique_ptr&lt;int&gt;&amp; p)\n{\n    (*p)++;\n    return *p;\n}\n\nstd::unique_ptr&lt;int&gt; asOwner(std::unique_ptr&lt;int&gt; p)\n{\n    (*p)++;\n    return p;\n}\n\nint main()\n{\n    \/\/ \u521b\u5efa\u521d\u59cbptr\n    std::unique_ptr&lt;int&gt; ptr = std::make_unique&lt;int&gt;(10);\n\n    \/\/ 1 \u4f20\u5f15\u7528\n    std::cout &lt;&lt; asRef(ptr) &lt;&lt; std::endl;\n\n    \/\/ 2 \u79fb\u4ea4\u6240\u6709\u6743\n    \/*\n        \u4f5c\u4e3a\u53c2\u6570\u4f20\u5165\u65f6release\n        \u4e00\u5b9a\u8981\u53d6\u5f97\u8fd4\u56de\u503c\uff0c\u5426\u5219\u5185\u5b58\u6cc4\u6f0f\n    *\/\n    ptr = asOwner(std::unique_ptr&lt;int&gt; (ptr.release()));\n\n    std::cout &lt;&lt; *ptr &lt;&lt; std::endl;\n\n    return 0;\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>&emsp;&emsp;\u4ee5unique_ptr\u4f5c\u4e3a\u53c2\u6570\u4f20\u5165\u3001\u4f20\u51fa\u51fd\u6570\u65f6\uff0c\u6709\u4ee5\u4e0b\u4e24\u79cd\u505a\u6cd5\uff1a\u4e00\u662f\u4f20\u5f15\u7528\uff1b\u4e8c\u662f\u79fb\u4ea4\u6240\u6709\u6743\u3002\u4f46\u6ce8\u610f\uff0c\u79fb\u4ea4\u6240 &#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48],"tags":[14],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/posts\/699"}],"collection":[{"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/comments?post=699"}],"version-history":[{"count":1,"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/posts\/699\/revisions"}],"predecessor-version":[{"id":700,"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/posts\/699\/revisions\/700"}],"wp:attachment":[{"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/media?parent=699"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/categories?post=699"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swordofmorning.com\/index.php\/wp-json\/wp\/v2\/tags?post=699"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}