TuanCanAPP_iOS1.0/Pods/SwiftyUserDefaults/Sources/Defaults+StringToBool.swift

//
// SwiftyUserDefaults
//
// Copyright (c) 2015-present Radosław Pietruszewski, Łukasz Mróz
//
// 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 Foundation

// We don't want to use `NSString.boolValue` as it's converting every miss to `false`, instead of `nil`
internal extension String {
    var bool: Bool? {
        switch self.lowercased() {
        case "true", "t", "yes", "y", "1":
            return true
        case "false", "f", "no", "n", "0":
            return false
        default:
            return nil
        }
    }
}