HelenOS sources

u32string        1985 uspace/lib/cpp/include/__bits/string/string.hpp     u32string operator "" s(const char32_t* str, size_t len);
u32string         352 uspace/lib/cpp/src/string.cpp     u32string operator "" s(const char32_t* str, size_t len)
u32string         354 uspace/lib/cpp/src/string.cpp         return u32string{str, len};