在ROS1/2中使用boost，例如下述：
引用如下程序：
代码语言：javascript复制#include <iostream>
#include <string>
#include <regex>
int main() {
std::string fnames[] = {"foo.txt", "bar.txt", "test", "a0.txt", "AAA.txt"};
// In C , `` will be used as an escape character in the string.
// In order for `.` to be passed as a regular expression,
// it is necessary to perform second escaping of ``, thus we have `\.`
std::regex txt_regex("[a-z] \.txt");
for (const auto &fname: fnames)
std::cout << fname << ": " << std::regex_match(fname, txt_regex) << std::endl;
std::regex base_regex("([a-z] )\.txt");
std::smatch base_match;
for(const auto &fname: fnames) {
if (std::regex_match(fname, base_match, base_regex)) {
// the first element of std::smatch matches the entire string
// the second element of std::smatch matches the first expression with brackets
if (base_match.size() == 2) {
std::string base = base_match[1].str();
std::cout << "sub-match[0]: " << base_match[0].str() << std::endl;
std::cout << fname << " sub-match[1]: " << base << std::endl;
}
}
}
return 0;
}
answers.ros.org/question/363788/select-topics-with-search-pattern-regex-in-rosbag2/
