data ConstantTable : Nat -> Type -> TypeA constant table that can be read in O(1) time
MkFromArray : ArrayData e -> ConstantTable (S n) elength : ConstantTable n e -> Natindex : Fin (S n) -> ConstantTable (S n) a -> aindex_bits8 : Bits8 -> ConstantTable 256 a -> afrom_vect : Vect (S n) a -> ConstantTable (S n) a