Function bigintValue

src/compute-engine/numerics/expression.ts:6–31

(
  expr: MathJsonExpression | null | undefined
)

import { numberToString } from './strings.js';

export function bigintValue(
  expr: MathJsonExpression | null | undefined
): bigint | null {
  if (typeof expr === 'number')
    return Number.isInteger(expr) ? BigInt(expr) : null;

  if (expr === null || expr === undefined) return null;

  if (!isNumberExpression(expr)) return null;

  const num = isNumberObject(expr) ? expr.num : expr;

  if (typeof num === 'number')
    return Number.isInteger(num) ? BigInt(num) : null;
  if (typeof num !== 'string') return null;

  const s = num
    .toLowerCase()
    .replace(/[nd]$/, '')
    .replace(/[\u0009-\u000d\u0020\u00a0]/g, '');

  if (s === 'nan') return null;
  if (/^(infinity|\+infinity|oo|\+oo|-infinity|-oo)$/.test(s)) return null;

  return bigint(s);
}

/** Output a shorthand if possible */
export function numberToExpression(