36     std::experimental::string_view sv {p};  in round_trip()  local
38     ss << std::quoted(sv);  in round_trip()
41     assert ( s == sv );  in round_trip()
49     std::experimental::string_view sv {p};  in round_trip_ws()  local
51     ss << std::quoted(sv);  in round_trip_ws()
54     assert ( s == sv );  in round_trip_ws()
60     std::experimental::string_view sv {p};  in round_trip_d()  local
62     ss << std::quoted(sv, delim);  in round_trip_d()
65     assert ( s == sv );  in round_trip_d()
70     std::experimental::string_view sv {p};  in round_trip_e()  local
72     ss << std::quoted(sv, '"', escape );  in round_trip_e()
75     assert ( s == sv );  in round_trip_e()
100     std::experimental::wstring_view sv {p};  in round_trip()  local
102     ss << std::quoted(sv);  in round_trip()
105     assert ( s == sv );  in round_trip()
114     std::experimental::wstring_view sv {p};  in round_trip_ws()  local
116     ss << std::quoted(sv);  in round_trip_ws()
119     assert ( s == sv );  in round_trip_ws()
125     std::experimental::wstring_view sv {p};  in round_trip_d()  local
127     ss << std::quoted(sv, delim);  in round_trip_d()
130     assert ( s == sv );  in round_trip_d()
135     std::experimental::wstring_view sv {p};  in round_trip_e()  local
137     ss << std::quoted(sv, wchar_t('"'), escape );  in round_trip_e()
140     assert ( s == sv );  in round_trip_e()
146     std::experimental::wstring_view sv {p};  in quote()  local
148     ss << std::quoted(sv, delim, escape);  in quote()
156     std::experimental::wstring_view sv {p};  in unquote()  local
158     ss << sv;  in unquote()