Function boxMachineNumber

src/compute-engine/boxed-expression/apply.ts:27–35

* Box a kernel result that is a plain JS double. * * In an engine working above machine precision, a plain-double result means * it was computed at machine precision (either no bignum kernel exists for * the operator, or the bignum kernel signalled "out of domain" and the * machine lane answere

(ce: IComputeEngine, value: number)

 * downstream arithmetic to machine precision, mirroring float contagion.
 *
 * Small integers stay exact: machine kernels return them for exact special
 * values (e.g. `BesselI(0, 0)` = 1), and `ce.number()` interns them.
 * Non-finite values keep their canonical boxing (±oo, NaN).
 */
function boxMachineNumber(ce: IComputeEngine, value: number): Expression {
  if (
    bignumPreferred(ce) &&
    Number.isFinite(value) &&
    !(Number.isInteger(value) && Math.abs(value) <= SMALL_INTEGER)
  )
    return ce.number(new MachineNumericValue(value));
  return ce.number(value);