Function unwrapOrPropagate

src/compute-engine/interval/util.ts:204–222

(
  ...inputs: Array<Interval | IntervalResult>
)

  if (result.kind === 'singular') return result.value;
  return undefined;
}

/**
 * Unwrap an interval from either a plain Interval or an IntervalResult.
 *
 * Used by arithmetic operations to accept both formats for convenience.
 * Returns undefined if the input is an IntervalResult without an enclosure
 * (empty, entire, or a pole).
 */
export function unwrap(input: Interval | IntervalResult): Interval | undefined {
  // Check if it's an IntervalResult
  if ('kind' in input) return getValue(input);
  // Plain interval
  return input;
}

/**
 * Unwrap and propagate errors from IntervalResult inputs.
 *
 * If any input has no enclosure (empty, entire, or a pole), returns that
 * result. Otherwise returns the unwrapped intervals. A finite jump (a
 * `singular` result that carries a `value`) is unwrapped to its enclosure so