erica

public struct Error: ErrorType {
    let source: String; let reason: String
    public init(_ source: String = __FILE__, _ reason: String) {
        self.reason = reason; self.source = source
    }
}

protocol Contextualizable {}
extension Contextualizable {
    func functionContext(function : String = __FUNCTION__) -> String {

zats

#!/usr/bin/env xcrun swift

// $ chmod +x script.swift
// $ ./script.swift
// or $ ./script.swift -xcode=/Applications/Xcode-beta.app

import Foundation

@noreturn private func failWithError(message: String) {
    print("🚫 \(message)")

chriseidhof

// gem install cocoapods-playgrounds
// pod playgrounds LibYAML

// Update: @floriankugler had a great idea to use UnsafeBufferPointer

// Paste in the following:

import LibYAML

public struct YAMLError: ErrorType {