jonah-williams

// I wanted an equivalent to Ruby's `tap` (http://ruby-doc.org/core-2.3.0/Object.html#method-i-tap) in Swift which I could mix into any type to tap into method chains.

// Define the interface we want to provide as a protocol
private protocol Tap {
    func tap(block: (Self) -> Void) -> Self
}

// Extend the `Tap` protocol with a default implementation
private extension Tap {
    func tap(block: (Self) -> Void) -> Self {