# Ergonomy ideas

- `Default` / `thread_local` global: `ez_urandom::random_u64()` without
  constructing or threading an `OsRandom`.
- `gen_range` for all int widths (currently only `u32`) plus a `Range` /
  `RangeInclusive` overload.
- `fill_bytes(&mut [u8])` convenience so callers don't need to import
  `io::Read`.
- `bool()` / `f64()` (unit interval) helpers.
- `shuffle(&mut [T])` and `choose<T>(&[T]) -> &T` — generic, not just bytes.
- Accept a `&str` alphabet directly (not just `&[u8]`) and drop the ASCII
  assert by iterating `chars()`.
- Loosen `&mut self` to `&self` via interior buffering, or impl `Clone`, so
  multiple call sites don't fight the borrow checker.
- Builder / presets: `OsRandom::password(len)`, `::hex(len)`, `::token(len)`.