I've implement a small size optimized `string` at
https://github.com/nordlow/phobos-next/blob/c35fa4052738af0cd7ad39a9fa715b5ec29c7bba/src/nxt/sso_string.d
I'm now wondering whether or not its definition of comparison at
https://github.com/nordlow/phobos-next/blob/c35fa4052738af0cd7ad39a9fa715b5ec29c7bba/src/nxt/sso_string.d#L248
is a suitable definition of `opCmp` for `SSOString` in terms of
independence of Phobos' `std.algorithm.comparison.cmp`.
I'm asking because comparison of `string`s can be done directly as
assert("a" < "b")
without any dependence on Phobos.
Is there a builtin definition of array (of `char`) comparison
defined somewhere in druntime?
Further, does
"a" < "b"
perform autodecoding of UTF-8 sequences?
