Function ReadonlyMapFromArray

packages/effect-app/src/Schema/ext.ts:311–338

(pair: {
  readonly key: KeySchema
  readonly value: ValueSchema
})

 * An annotated `S.Array` of key-value tuples that decodes to a `ReadonlyMap`.
 */
export const ReadonlyMapFromArray = <KeySchema extends S.Top, ValueSchema extends S.Top>(pair: {
  readonly key: KeySchema
  readonly value: ValueSchema
}) => {
  const from = S
    .Array(S.Tuple([pair.key, pair.value]))
    .annotate({
      ...concurrencyUnbounded,
      expected: "an array of key-value tuples that will be decoded as a ReadonlyMap"
    })
  const to = S.instanceOf(Map) as S.instanceOf<
    ReadonlyMap<KeySchema["Type"], ValueSchema["Type"]>
  >
  const schema = from.pipe(
    S.decodeTo(
      to,
      SchemaTransformation.transform({
        decode: (
          arr
        ) => new Map(arr) as ReadonlyMap<KeySchema["Type"], ValueSchema["Type"]>,
        encode: (
          map
        ) => [...map.entries()] as any // fu
      })
    )
  )
  return schema
}

/** Like the default Schema `ReadonlySet` but from Array, with default helpers. */
export const ReadonlySet = <ValueSchema extends S.Top>(value: ValueSchema) =>