from_uint(0) = 0
from_uint(1) = 1
from_uint(2) = 2
from_uint(8) = 8
from_uint(10) = 10
from_uint(16) = 16
from_uint(127) = 127
from_uint(255) = 255
from_uint(256) = <<out-of-range>>
from_uint(2147483647) = <<out-of-range>>