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bfernandesbfs/Result.swift

Created April 12, 2017 21:53
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  1. bfernandesbfs created this gist Apr 12, 2017.
    69 changes: 69 additions & 0 deletions Result.swift
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,69 @@
    public typealias JSON = [String: Any]

    public enum Result<A> {
    case success(A)
    case failure(Error)

    public var isSuccess: Bool {
    switch self {
    case .success:
    return true
    case .failure:
    return false
    }
    }

    public var value: A? {
    guard case .success(let v) = self else { return nil }
    return v
    }

    public var error: Error? {
    switch self {
    case .success:
    return nil
    case .failure(let error):
    return error
    }
    }
    }

    // MARK: - Initialize

    extension Result {
    public init(_ value: A?, or error: Error) {
    if let value = value {
    self = .success(value)
    } else {
    self = .failure(error)
    }
    }
    }

    // MARK: - CustomStringConvertible

    extension Result: CustomStringConvertible {

    public var description: String {
    switch self {
    case .success:
    return "SUCCESS"
    case .failure:
    return "FAILURE"
    }
    }
    }

    // MARK: - CustomDebugStringConvertible

    extension Result: CustomDebugStringConvertible {

    public var debugDescription: String {
    switch self {
    case .success(let value):
    return "SUCCESS: \(value)"
    case .failure(let error):
    return "FAILURE: \(error)"
    }
    }
    }