# Gives the length of the UTF-8 char starting with `self`
	fun u8len: Int do
		if self & 0b1000_0000 == 0 then
			return 1
		else if self & 0b1110_0000 == 0b1100_0000 then
			return 2
		else if self & 0b1111_0000 == 0b1110_0000 then
			return 3
		else if self & 0b1111_1000 == 0b1111_0000 then
			return 4
		else
			return 1
		end
	end