42     std::basic_regex re(s1.begin(), s1.end());  in main()  local
51     std::basic_regex re(s1.begin(), s1.end(), std::regex_constants::basic);  in main()  local
61     std::basic_regex re("(a([bc]))"s);  in main()  local
69     std::basic_regex re(L"(a([bc]))"s, std::regex_constants::awk);  in main()  local
77     std::basic_regex re("ABCDE");  in main()  local
85     std::basic_regex re(L"ABCDE", std::regex_constants::grep);  in main()  local
93     std::basic_regex re("ABCDEDEF", 7);  in main()  local
101     std::basic_regex re(L"ABCDEDEF", 8, std::regex_constants::awk);  in main()  local
110     std::basic_regex re(source);  in main()  local
124     std::basic_regex re({'A', 'B', 'F', 'E', 'D'});  in main()  local
132     std::basic_regex re({L'A', L'B', L'F', L'E', L'D'}, std::regex_constants::grep);  in main()  local