Uniform in [start, end) for the reference's usize instantiation (numbers in [0, 2^53 - 1], 64-bit draw); see nextWithUpperBoundUsize.
[start, end)
usize
number
[0, 2^53 - 1]
unless start < end are integers in [0, 2^53 - 1].
start < end
Uniform in
[start, end)for the reference'susizeinstantiation (numbers in[0, 2^53 - 1], 64-bit draw); see nextWithUpperBoundUsize.