Function machineValue

src/math-json/utils.ts:289–301

(
  expr: MathJsonExpression | null | undefined
)

 *  has a precision outside of the machine range.
 */
export function machineValue(
  expr: MathJsonExpression | null | undefined
): number | null {
  if (typeof expr === 'number') return expr;

  if (typeof expr === 'string' && matchesNumber(expr))
    return machineValueOfString(expr);

  // Strictly, expr.num should be a string, but we allow it to be a number
  if (expr !== undefined && isNumberObject(expr)) return machineValue(expr.num);

  return null;
}

/**
 * Return a rational (numer over denom) representation of the expression,