正则表达式
正则表达式学习网址:https://www.runoob.com/regexp/regexp-tutorial.html
正则表达式在线测试:https://c.runoob.com/front-end/854
正则表达式学习示例
1、^InterGateway\.\d\.(user|name)$
可以匹配 InterGateway.1.user 或 InterGateway.2.name
2、regex_replace
string str = "InterGateway.device.1.user";
regex pattern("^(InterGateway\.device\.)\d\.(user|name)$");
regex_replace(str, pattern, "$1$2") ===> InterGateway.device.user
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