const fn build_table() -> [u64; 256]
Expand description
Build the full 256‑entry table at compile time.
We cannot yet write for _ in 0..256
here: for
loops rely on
Iterator::next
, which is not const
on stable Rust. Until the
const_for
feature (tracking issue #87575) is stabilized, a while
loop is the only option in a const fn