Function transform

repos/effect/packages/effect/src/unstable/cli/Param.ts:1045–1055

(
  self: Param<Kind, A>,
  f: (parse: Parse<A>) => Parse<B>
)

 * port.kind // => "flag"
 * ```
 *
 * @category combinators
 * @since 4.0.0
 */
export const map: {
  <A, B>(f: (a: A) => B): <Kind extends ParamKind>(self: Param<Kind, A>) => Param<Kind, B>
  <Kind extends ParamKind, A, B>(self: Param<Kind, A>, f: (a: A) => B): Param<Kind, B>
} = dual(2, <Kind extends ParamKind, A, B>(self: Param<Kind, A>, f: (a: A) => B) => {
  const parse: Parse<B> = (args: ParsedArgs) =>
    Effect.map(
      self.parse(args),
      ([operands, value]) => [operands, f(value)] as const
    )
  return Object.assign(Object.create(Proto), {