ts-cast/esm/engine/optional.js

Runtime typechecking

import { withName } from '../helpers/names';
import { throwTypeError } from './throw-type-error';
const optional = (caster) => withName((value, context, reportError = throwTypeError) => (value !== undefined
    ? caster(value, context, reportError)
    : value), `${caster.name} | undefined`);
export default optional;