ReadonlywidthTarget width in bits; an unsigned value above 2^width − 1 is OutOfRange.
Optional ReadonlywrapAlso accept a negative integer node and wrap it as the reference does:
a value v in [−2^width, −1] yields 2^width + v (so −1 is 255 at
width 8), and a value below −2^width is OutOfRange. Off by default:
without it a negative node is WrongType, as for every other type. See
RUST_DIVERGENCES.md §1.1.
Options for expectUnsigned: extract into a fixed-width unsigned integer the way the reference's
u8/u16/u32/u64: TryFrom<CBOR>do (dcbor 0.25.2int.rs).