Function literal

packages/effect/src/internal/config.ts:304–322

(...literals: Literals)

/** @internal */
export const literal = <Literals extends ReadonlyArray<Config.LiteralValue>>(...literals: Literals) =>
(
  name?: string
): Config.Config<Literals[number]> => {
  const valuesString = literals.map(String).join(", ")
  const config = primitive(`one of (${valuesString})`, (text) => {
    const found = literals.find((value) => String(value) === text)
    if (found === undefined) {
      return Either.left(
        configError.InvalidData(
          [],
          `Expected one of (${valuesString}) but received ${formatUnknown(text)}`
        )
      )
    }
    return Either.right(found)
  })
  return name === undefined ? config : nested(config, name)
}

/** @internal */
export const logLevel = (name?: string): Config.Config<LogLevel.LogLevel> => {