{"id":37881,"date":"2023-07-10T11:32:28","date_gmt":"2023-07-10T03:32:28","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=37881"},"modified":"2023-07-31T00:37:44","modified_gmt":"2023-07-30T16:37:44","slug":"c%e7%9a%84traits%e6%8a%80%e6%9c%af%e5%88%b0%e5%ba%95%e6%98%af%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/37881.html","title":{"rendered":"C++\u7684traits\u6280\u672f\u5230\u5e95\u662f\u4ec0\u4e48"},"content":{"rendered":"<blockquote class=\"wp-block-quote\">\n<p>C++\u7684traits\u6280\u672f\u662f\u4e00\u79cd\u7f16\u7a0b\u6280\u5de7\uff0c\u5176\u4e3b\u8981\u76ee\u7684\u662f\u5728\u7f16\u8bd1\u65f6\u63d0\u4f9b\u5173\u4e8e\u7c7b\u578b\u7684\u989d\u5916\u4fe1\u606f\u3002traits\u53ef\u4ee5\u62bd\u8c61\u51fa\u4e00\u4e9b\u516c\u5171\u7684\u884c\u4e3a\u6216\u5c5e\u6027\uff0c\u4f7f\u5f97\u6a21\u677f\u4ee3\u7801\u66f4\u52a0\u901a\u7528\u548c\u7075\u6d3b\u3002\u901a\u8fc7\u4f7f\u7528traits\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5b9e\u73b0\u7f16\u8bd1\u65f6\u591a\u6001\uff0c\u589e\u5f3a\u4e86C++\u7f16\u7a0b\u7684\u80fd\u529b\u3002\u5728C++\u4e2d\uff0c\u6211\u4eec\u5e38\u5e38\u9700\u8981\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u53ef\u80fd\u5177\u6709\u5171\u540c\u7684\u884c\u4e3a\u6216\u5c5e\u6027\u3002<\/p>\n<\/blockquote>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" alt=\"\" class=\"wp-image-37882\" decoding=\"async\" height=\"421\" sizes=\"(max-width: 680px) 100vw, 680px\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/07\/\u6dfb\u52a0\u6807\u9898-17-1.png?x-oss-process=image\/auto-orient,1\/format,webp\" srcset=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/07\/\u6dfb\u52a0\u6807\u9898-17-1.png?x-oss-process=image\/auto-orient,1\/format,webp 680w, https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/07\/\u6dfb\u52a0\u6807\u9898-17-1-300x186.png 300w\" width=\"680\"\/><\/figure>\n<\/div>\n<p>\u5728C++\u7f16\u7a0b\u4e2d\uff0ctraits\u662f\u4e00\u79cd\u7f16\u7a0b\u6280\u5de7\uff0c\u5176\u4e3b\u8981\u76ee\u7684\u662f\u5728\u7f16\u8bd1\u65f6\u63d0\u4f9b\u5173\u4e8e\u7c7b\u578b\u7684\u989d\u5916\u4fe1\u606f\u3002\u5b83\u53ef\u4ee5\u5c06\u7c7b\u578b\u7684\u4e00\u4e9b\u7279\u6027\uff08\u5982\u5176\u5173\u8054\u7c7b\u578b\u3001\u5c5e\u6027\u3001\u51fd\u6570\u7b49\uff09\u62bd\u8c61\u51fa\u6765\uff0c\u4f7f\u5f97\u6a21\u677f\u4ee3\u7801\u66f4\u52a0\u901a\u7528\u548c\u7075\u6d3b\u3002<\/p>\n<h2 class=\"wp-block-heading\"><strong>traits<\/strong><strong>\u7684\u57fa\u672c\u6982\u5ff5<\/strong><\/h2>\n<p>\u5728C++\u4e2d\uff0c\u6211\u4eec\u5e38\u5e38\u9700\u8981\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u53ef\u80fd\u5177\u6709\u5171\u540c\u7684\u884c\u4e3a\u6216\u5c5e\u6027\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u9700\u8981\u5904\u7406\u5404\u79cd\u7c7b\u578b\u7684\u5bb9\u5668\uff0c\u8fd9\u4e9b\u5bb9\u5668\u90fd\u5177\u6709\u63d2\u5165\u3001\u5220\u9664\u3001\u67e5\u627e\u7b49\u64cd\u4f5c\u3002\u901a\u8fc7traits\u6280\u672f\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u5171\u540c\u7684\u884c\u4e3a\u6216\u5c5e\u6027\u62bd\u8c61\u51fa\u6765\uff0c\u4ee5\u8fbe\u5230\u4ee3\u7801\u590d\u7528\u548c\u6a21\u5757\u5316\u7684\u76ee\u6807\u3002<\/p>\n<h2 class=\"wp-block-heading\"><strong>traits<\/strong><strong>\u7684\u4f7f\u7528\u573a\u666f<\/strong><\/h2>\n<p>traits\u5728C++\u7f16\u7a0b\u4e2d\u6709\u8bb8\u591a\u4f7f\u7528\u573a\u666f\u3002\u5b83\u4eec\u901a\u5e38\u7528\u4e8e\u6a21\u677f\u5143\u7f16\u7a0b\u3001\u7b56\u7565\u8bbe\u8ba1\u6a21\u5f0f\u3001\u4eff\u51fd\u6570\u7b49\u573a\u5408\u3002\u901a\u8fc7\u4f7f\u7528traits\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5b9e\u73b0\u7f16\u8bd1\u65f6\u591a\u6001\uff0c\u589e\u5f3a\u4e86C++\u7f16\u7a0b\u7684\u80fd\u529b\u3002<\/p>\n<h2 class=\"wp-block-heading\"><strong>\u603b\u7ed3<\/strong><\/h2>\n<p>\u603b\u7684\u6765\u8bf4\uff0ctraits\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u7f16\u7a0b\u6280\u5de7\uff0c\u5b83\u53ef\u4ee5\u4f7f\u6211\u4eec\u7684\u4ee3\u7801\u66f4\u52a0\u901a\u7528\u548c\u7075\u6d3b\u3002\u901a\u8fc7\u6df1\u5165\u7406\u89e3\u548c\u719f\u7ec3\u5e94\u7528traits\uff0c\u6211\u4eec\u53ef\u4ee5\u5728C++\u7f16\u7a0b\u4e2d\u505a\u5230\u66f4\u591a\u3002<\/p>\n<h2 class=\"wp-block-heading\"><strong>\u5ef6\u4f38\u9605\u8bfb<\/strong><\/h2>\n<ol start=\"1\" type=\"1\">\n<li><strong>\u6df1\u5165\u7406\u89e3C++\u7684traits\u6280\u672f<\/strong>\uff1a\u8be6\u7ec6\u4ecb\u7ecdtraits\u7684\u5185\u90e8\u5b9e\u73b0\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528traits\u7f16\u5199\u901a\u7528\u7684\u6a21\u677f\u4ee3\u7801\u3002<\/li>\n<li><strong>C++<\/strong><strong>\u6a21\u677f\u5143\u7f16\u7a0b\u4e0etraits<\/strong>\uff1a\u4ecb\u7ecd\u6a21\u677f\u5143\u7f16\u7a0b\u4e2d\u5982\u4f55\u4f7f\u7528traits\uff0c\u4ee5\u53catraits\u5982\u4f55\u589e\u5f3a\u6a21\u677f\u5143\u7f16\u7a0b\u7684\u80fd\u529b\u3002<\/li>\n<li><strong>C++<\/strong><strong>\u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u7684traits\u5e94\u7528<\/strong>\uff1a\u4ee5\u7b56\u7565\u8bbe\u8ba1\u6a21\u5f0f\u4e3a\u4f8b\uff0c\u4ecb\u7ecd\u5982\u4f55\u5728\u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u4f7f\u7528traits\u6765\u63d0\u9ad8\u4ee3\u7801\u7684\u590d\u7528\u6027\u548c\u7075\u6d3b\u6027\u3002<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"C++\u7684traits\u6280\u672f\u662f\u4e00\u79cd\u7f16\u7a0b\u6280\u5de7\uff0c\u5176\u4e3b\u8981\u76ee\u7684\u662f\u5728\u7f16\u8bd1\u65f6\u63d0\u4f9b\u5173\u4e8e\u7c7b\u578b\u7684\u989d\u5916\u4fe1\u606f\u3002traits\u53ef\u4ee5\u62bd\u8c61\u51fa\u4e00\u4e9b 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