Module rand 

Randomness utilities.

Structs

Boundary

A boundary-value sampler for T: each fixed-width max ±1 and the half-range midpoint ±1. Boundary::<T>::new().sample(rng) returns one.

Probe

A range-bounded, boundary-biased u64 sampler: about one draw in four a range edge, the rest log-uniform over the non-zero interior, so 0 appears only as an edge.

Wide

A log-uniform, random-sign magnitude sampler with a boundary tail. See the section note above.