Function requiredToOptional

packages/effect/src/Schema.ts:2275–2290

(
  from: Schema<FA, FI, FR>,
  to: Schema<TA, TI, TR>,
  options: {
    readonly decode: (fa: FA) => option_.Option<TI>
    readonly encode: (o: option_.Option<TI>) => FA
  }
)

 * @since 3.10.0
 */
export const requiredToOptional = <FA, FI, FR, TA, TI, TR>(
  from: Schema<FA, FI, FR>,
  to: Schema<TA, TI, TR>,
  options: {
    readonly decode: (fa: FA) => option_.Option<TI>
    readonly encode: (o: option_.Option<TI>) => FA
  }
): PropertySignature<"?:", TA, never, ":", FI, false, FR | TR> =>
  makePropertySignature(
    new PropertySignatureTransformation(
      new FromPropertySignature(from.ast, false, true, {}, undefined),
      new ToPropertySignature(to.ast, true, true, {}, undefined),
      option_.flatMap(options.decode),
      (o) => option_.some(options.encode(o))
    )
  )

/**
 * Converts an optional property to another optional property through a transformation `Option -> Option`.