是你的代码包含 ??（这是C ++中的 [三字母或做某事来打破它们：

The problem is that your code contains ??( which is a trigraph in C++ for [. You'll either need to disable trigraphs or do something to break them up like:

pcrecpp::RE re("^((\\w+):\\/\\/\\/?)?((\\w+):?(\\w+)?@)?([^\\/\\?:]+):?(\\d+)?(\\/?[^\\?#;\\|]+)?([;\\|])?([^\\?#]+)?\\??" "([^#]+)?#?(\\w*)");