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(32767) = 32767
from_uint(2147483647) = 2147483647
from_uint(2147483648) = 2147483648
from_uint(4294967295) = 4294967295
from_uint(4294967296) = <<out-of-range>>
from_uint(9223372036854775807) = <<out-of-range>>
from_uint(9223372036854775808) = <<out-of-range>>
from_uint(18446744073709551615) = <<out-of-range>>