49 lines
967 B
Swift
49 lines
967 B
Swift
// Copyright (c) 2019-2020 XMLCoder contributors
|
|
//
|
|
// This software is released under the MIT License.
|
|
// https://opensource.org/licenses/MIT
|
|
//
|
|
// Created by Max Desiatov on 05/10/2019.
|
|
//
|
|
|
|
struct DoubleBox: Equatable, ValueBox {
|
|
typealias Unboxed = Double
|
|
|
|
let unboxed: Unboxed
|
|
|
|
init(_ value: Unboxed) {
|
|
unboxed = value
|
|
}
|
|
|
|
init?(xmlString: String) {
|
|
guard let unboxed = Double(xmlString) else { return nil }
|
|
|
|
self.init(unboxed)
|
|
}
|
|
}
|
|
|
|
extension DoubleBox: Box {
|
|
var isNull: Bool {
|
|
return false
|
|
}
|
|
|
|
var xmlString: String? {
|
|
guard !unboxed.isNaN else {
|
|
return "NaN"
|
|
}
|
|
|
|
guard !unboxed.isInfinite else {
|
|
return (unboxed > 0.0) ? "INF" : "-INF"
|
|
}
|
|
|
|
return unboxed.description
|
|
}
|
|
}
|
|
|
|
extension DoubleBox: SimpleBox {}
|
|
|
|
extension DoubleBox: CustomStringConvertible {
|
|
var description: String {
|
|
return unboxed.description
|
|
}
|
|
}
|