36     ss << std::quoted(sv);  in round_trip()
38     ss >> std::quoted(s);  in round_trip()
49     ss << std::quoted(sv);  in round_trip_ws()
51     ss >> std::quoted(s);  in round_trip_ws()
60     ss << std::quoted(sv, delim);  in round_trip_d()
62     ss >> std::quoted(s, delim);  in round_trip_d()
70     ss << std::quoted(sv, '"', escape );  in round_trip_e()
72     ss >> std::quoted(s, '"', escape );  in round_trip_e()
80     ss << std::quoted(p, delim, escape);  in quote()
90     ss >> std::quoted(s, delim, escape);  in unquote()
100     ss << std::quoted(sv);  in round_trip()
102     ss >> std::quoted(s);  in round_trip()
114     ss << std::quoted(sv);  in round_trip_ws()
116     ss >> std::quoted(s);  in round_trip_ws()
125     ss << std::quoted(sv, delim);  in round_trip_d()
127     ss >> std::quoted(s, delim);  in round_trip_d()
135     ss << std::quoted(sv, wchar_t('"'), escape );  in round_trip_e()
137     ss >> std::quoted(s, wchar_t('"'), escape );  in round_trip_e()
146     ss << std::quoted(sv, delim, escape);  in quote()
158     ss >> std::quoted(s, delim, escape);  in unquote()