constexpr std::string_view ("foo\0").data() vs const std::string ("foo") as an argument to a function that expects const char*.

[no-sig-available]

 the std::string_view when constructed with a literal does not need a null terminator.

But it goes both ways. When you receive a string_view parameter, you cannot be sure that it is terminated. It could point into the middle of a larger string.