OpRes

OpRes.framework is tiny library to extend Swift's Optional and Result type to be Rust lang style.

Install

If you want to use Carthage or CocoaPods, please use the commitment tagged 0.5.6 .

With Swift Package Manager

Add this lines to your Package.swift or set to the setting in Xcode.

dependencies: [
    .package(
        url: "https://github.com/sadaie/OpRes.git",
        from: "1.0.0"
    )
]

Usage

Please see OpResTests/OpResTests.swift to know more details.

Optional

import OpRes

let option: Int? = 10
// The first statement is equivalent to the second one.
let x: Int = option.map { $0 * 10 } ?? 0
let y: Int = option.map(or: 0) { $0 * 10 }

print(x == y) // prints `true`

Result

import OpRes

enum MyError: Error {
    case someError
}

let option: Int? = 10
let result: Result<Int, MyError> = option.map { $0 * 10 }.ok(or: .someError)
let x: Int = option.map { $0 * 10 }.expect("should be unwrapped")
let y: Int = result.expect("should be unwrapped")

print(x == y) // prints `true`

License

MIT license.