Function toInteger

src/compute-engine/boxed-expression/numerics.ts:186–194

(expr: Expression | undefined)

 * instead. (This is what makes `toInteger` unsuitable for value-semantic uses
 * such as primality testing — see `isPrime` in predicates.ts.)
 */
export function toInteger(expr: Expression | undefined): number | null {
  if (!isNumber(expr)) return null;
  const num = expr.numericValue;
  const re = typeof num === 'number' ? num : num.re;
  if (!Number.isFinite(re)) return null;
  const n = Math.round(re);
  if (!Number.isSafeInteger(n)) return null;
  return n;
}

/**