ResultAsyncExtensions

ResultAsyncExtensions.swift

import Foundation

extension Result {
  public func flatMap<NewSuccess>(
    _ transform: (Success) async -> Result<NewSuccess, Failure>
  ) async -> Result<NewSuccess, Failure> {
    switch self {
    case let .success(success):
      await transform(success)
    case let .failure(error):
      .failure(error)
    }
  }
  
  public func flatMapError<NewFailure>(
    _ transform: (Failure) async -> Result<Success, NewFailure>
  ) async -> Result<Success, NewFailure> {
    switch self {
    case let .success(success):
      .success(success)
    case let .failure(error):
      await transform(error)
    }
  }

  public func map<NewSuccess>(
    _ transform: (Success) async -> NewSuccess
  ) async -> Result<NewSuccess, Failure> {
    switch self {
    case let .success(success):
      await .success(transform(success))
    case let .failure(error):
      .failure(error)
    }
  }
}