//
//  Copyright (c) 2018 Touch Instinct
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the Software), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.
//

import RxCocoa

public extension SharedSequence {

    /// Replaces all emitted elements with new one.
    ///
    /// - Parameter value: A new element.
    /// - Returns: An observable sequence whose elements are equals to passed value.
    func replace<T>(with value: T) -> SharedSequence<SharingStrategy, T> {
        map { _ in value } // swiftlint:disable:this unused_map_parameter
    }

    /// Replaces all emitted elements with Void.
    ///
    /// - Returns: An observable sequence whose elements are equals to Void.
    func asVoid() -> SharedSequence<SharingStrategy, Void> {
        replace(with: Void())
    }

    /// Cast all emitted elements to optional type.
    ///
    /// - Returns: An observable sequence whose elements are equals to optional type of element.
    func asOptional() -> SharedSequence<SharingStrategy, Element?> {
        map { $0 }
    }
}