/*

    Copyright (C) 2016 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    Adds functionality to any `RangeReplaceableCollection` that has `Int`

                indices the ability to be subscripted by an `IndexSet`, a Foundation

                type that stores integer indexes.

*/

import Foundation

extension RangeReplaceableCollection where Index == Int, IndexDistance == Int {

    /// Returns a collection with elements in `indexes`.

    subscript(indexes: IndexSet) -> Self {

        var new = Self()

        new.reserveCapacity(indexes.count)

        for idx in indexes {

            new.append(self[idx])

        }

        return new

    }

}