{"id":23824,"date":"2023-04-09T12:23:30","date_gmt":"2023-04-09T04:23:30","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=23824"},"modified":"2023-07-30T23:15:48","modified_gmt":"2023-07-30T15:15:48","slug":"c%e8%af%ad%e8%a8%80%e5%ae%8f%e5%ae%9a%e4%b9%89%e5%89%8d%e9%9d%a2%e7%9a%84-extension-%e6%98%af%e4%bb%80%e4%b9%88%e6%84%8f%e6%80%9d","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/23824.html","title":{"rendered":"C\u8bed\u8a00\u5b8f\u5b9a\u4e49\u524d\u9762\u7684 extension \u662f\u4ec0\u4e48\u610f\u601d"},"content":{"rendered":"<blockquote class=\"wp-block-quote\">\n<p>\u5728 C \u8bed\u8a00\u4e2d\uff0c__extension__ \u662f\u4e00\u4e2a\u7f16\u8bd1\u5668\u6307\u4ee4\uff0c\u7528\u4e8e\u544a\u8bc9\u7f16\u8bd1\u5668\u5bf9\u5b8f\u8fdb\u884c\u6269\u5c55\u65f6\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e9b\u4e0d\u7b26\u5408 ANSI \u6807\u51c6\u7684\u8bed\u6cd5\u3002\u8fd9\u4e2a\u6307\u4ee4\u901a\u5e38\u7528\u4e8e\u907f\u514d\u7f16\u8bd1\u5668\u4ea7\u751f\u4e00\u4e9b\u4e0d\u5fc5\u8981\u7684\u8b66\u544a\u6216\u9519\u8bef\u4fe1\u606f\u3002<\/p>\n<\/blockquote>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" alt=\"\" class=\"wp-image-23826\" decoding=\"async\" height=\"421\" sizes=\"(max-width: 680px) 100vw, 680px\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/04\/\u6a21\u677f2-\u526f\u672c-\u526f\u672c-\u526f\u672c-\u526f\u672c-25-1.jpg?x-oss-process=image\/auto-orient,1\/format,webp\" srcset=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/04\/\u6a21\u677f2-\u526f\u672c-\u526f\u672c-\u526f\u672c-\u526f\u672c-25-1.jpg?x-oss-process=image\/auto-orient,1\/format,webp 680w, https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/04\/\u6a21\u677f2-\u526f\u672c-\u526f\u672c-\u526f\u672c-\u526f\u672c-25-1-300x186.jpg 300w\" width=\"680\"\/><\/figure>\n<\/div>\n<h2 class=\"wp-block-heading\">\u4e00\u3001C\u8bed\u8a00\u5b8f\u5b9a\u4e49\u524d\u9762\u7684 <strong>extension<\/strong> \u662f\u4ec0\u4e48\u610f\u601d<\/h2>\n<p>\u5728 C \u8bed\u8a00\u4e2d\uff0c<code>__extension__<\/code> \u662f\u4e00\u4e2a\u7f16\u8bd1\u5668\u6307\u4ee4\uff0c\u7528\u4e8e\u544a\u8bc9\u7f16\u8bd1\u5668\u5bf9\u5b8f\u8fdb\u884c\u6269\u5c55\u65f6\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e9b\u4e0d\u7b26\u5408 ANSI \u6807\u51c6\u7684\u8bed\u6cd5\u3002\u8fd9\u4e2a\u6307\u4ee4\u901a\u5e38\u7528\u4e8e\u907f\u514d\u7f16\u8bd1\u5668\u4ea7\u751f\u4e00\u4e9b\u4e0d\u5fc5\u8981\u7684\u8b66\u544a\u6216\u9519\u8bef\u4fe1\u606f\u3002<\/p>\n<p>\u5728 C \u8bed\u8a00\u4e2d\uff0c\u5b8f\u5b9a\u4e49\u662f\u4e00\u79cd\u9884\u5904\u7406\u6307\u4ee4\uff0c\u7528\u4e8e\u5c06\u4ee3\u7801\u4e2d\u7684\u4e00\u4e9b\u5e38\u91cf\u3001\u51fd\u6570\u6216\u8bed\u53e5\u5757\u5b9a\u4e49\u4e3a\u4e00\u4e2a\u5b8f\uff0c\u4ee5\u4fbf\u5728\u4ee3\u7801\u4e2d\u591a\u6b21\u4f7f\u7528\u3002\u5728\u6269\u5c55\u5b8f\u65f6\uff0c\u7f16\u8bd1\u5668\u4f1a\u5c06\u5b8f\u7684\u540d\u79f0\u66ff\u6362\u4e3a\u5b8f\u5b9a\u4e49\u4e2d\u7684\u4ee3\u7801\u3002<\/p>\n<p>\u5728\u4e00\u4e9b\u60c5\u51b5\u4e0b\uff0c\u7f16\u8bd1\u5668\u53ef\u80fd\u4f1a\u5bf9\u5b8f\u8fdb\u884c\u4e00\u4e9b\u8bed\u6cd5\u5206\u6790\uff0c\u4ee5\u4fbf\u68c0\u6d4b\u4ee3\u7801\u4e2d\u7684\u9519\u8bef\u6216\u8b66\u544a\u3002\u7136\u800c\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5b8f\u7684\u5b9a\u4e49\u53ef\u80fd\u4f7f\u7528\u4e86\u4e00\u4e9b\u975e\u6807\u51c6\u7684\u8bed\u6cd5\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u5668\u53d1\u51fa\u4e0d\u5fc5\u8981\u7684\u8b66\u544a\u6216\u9519\u8bef\u4fe1\u606f\u3002<\/p>\n<p>\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0cC \u8bed\u8a00\u5f15\u5165\u4e86 <code>__extension__<\/code> \u6307\u4ee4\u3002\u8fd9\u4e2a\u6307\u4ee4\u544a\u8bc9\u7f16\u8bd1\u5668\uff0c\u6269\u5c55\u5b8f\u65f6\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e9b\u4e0d\u7b26\u5408 ANSI \u6807\u51c6\u7684\u8bed\u6cd5\uff0c\u4ece\u800c\u907f\u514d\u4ea7\u751f\u4e0d\u5fc5\u8981\u7684\u8b66\u544a\u6216\u9519\u8bef\u4fe1\u606f\u3002\u901a\u5e38\uff0c<code>__extension__<\/code> \u6307\u4ee4\u51fa\u73b0\u5728\u5b8f\u5b9a\u4e49\u524d\u9762\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre class=\"wp-block-code\"><code><strong>extension<\/strong> #define MY_MACRO(x) ((x) * 2)<\/code><\/pre>\n<p>\u4f7f\u7528 <code>__extension__<\/code> \u6307\u4ee4\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4ee3\u7801\u7684\u53ef\u79fb\u690d\u6027\u53d7\u5230\u5f71\u54cd\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u6307\u4ee4\u5e76\u4e0d\u662f\u6807\u51c6\u7684 C \u8bed\u8a00\u8bed\u6cd5\u3002\u56e0\u6b64\uff0c\u5728\u7f16\u5199\u8de8\u5e73\u53f0\u7684\u4ee3\u7801\u65f6\uff0c\u5e94\u8be5\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u8fd9\u4e2a\u6307\u4ee4\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728 C \u8bed\u8a00\u4e2d\uff0c__extension__ \u662f\u4e00\u4e2a\u7f16\u8bd1\u5668\u6307\u4ee4\uff0c\u7528\u4e8e\u544a\u8bc9\u7f16\u8bd1\u5668\u5bf9\u5b8f\u8fdb\u884c\u6269\u5c55\u65f6\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e9b\u4e0d\u7b26\u5408 [&hellip;]","protected":false},"author":1,"featured_media":23825,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[277],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/23824"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=23824"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/23824\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/23825"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=23824"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=23824"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=23824"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}