Function makeSingle

packages/effect/src/unstable/cli/Param.ts:335–356

(params: {
  readonly kind: Kind
  readonly name: string
  readonly primitiveType: Primitive.Primitive<A>
  readonly typeName?: string | undefined
  readonly description?: Option.Option<string> | undefined
  readonly aliases?: ReadonlyArray<string> | undefined
  readonly hidden?: boolean | undefined
})

 * @since 4.0.0
 */
export const makeSingle = <const Kind extends ParamKind, A>(params: {
  readonly kind: Kind
  readonly name: string
  readonly primitiveType: Primitive.Primitive<A>
  readonly typeName?: string | undefined
  readonly description?: Option.Option<string> | undefined
  readonly aliases?: ReadonlyArray<string> | undefined
  readonly hidden?: boolean | undefined
}): Single<Kind, A> => {
  const parse: Parse<A> = (args) =>
    params.kind === argumentKind
      ? parsePositional(params.name, params.primitiveType, args)
      : parseFlag(params.name, params.primitiveType, args)
  return Object.setPrototypeOf({
    _tag: "Single",
    ...params,
    description: params.description ?? Option.none(),
    aliases: params.aliases ?? [],
    hidden: params.hidden ?? false,
    parse
  }, Proto)
}

/**
 * Creates a string parameter.