s1.min=-1 s1.max=0
s2.min=-2 s2.max=1
s3.max=3
u1.min=0 u1.max=1
u2.max=3
s8.min=-128 s8.max=127
u8.max=255
s32.min=-2147483648 s32.max=2147483647
s64.max=9223372036854775807
s64.min+1 == -(s64.max): true
s64.min + s64.max == -1: true
u64.max as s64 == -1: true
usize.max as s64 == -1: true
usize.max == u64.max: true
isize.min == s64.min: true
typed: m3=3 mu=255 ms=-128
[u8.max]u8 len=255 a[254]=7
[s16.max]u8 len=32767 b[32766]=9