HelenOS sources

u16string        1984 uspace/lib/cpp/include/__bits/string/string.hpp     u16string operator "" s(const char16_t* str, size_t len);
u16string         347 uspace/lib/cpp/src/string.cpp     u16string operator "" s(const char16_t* str, size_t len)
u16string         349 uspace/lib/cpp/src/string.cpp         return u16string{str, len};