87 lines
2.7 KiB
Swift
87 lines
2.7 KiB
Swift
//
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// Copyright (c) 2017 Touch Instinct
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the Software), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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import Foundation
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/**
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Use `Support` proxy as customization point for constrained protocol extensions.
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General pattern would be:
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// 1. Extend Support protocol with constrain on Base
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// Read as: Support Extension where Base is a SomeType
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extension Support where Base: SomeType {
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// 2. Put any specific reactive extension for SomeType here
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}
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With this approach we can have more specialized methods and properties using
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`Base` and not just specialized on common base type.
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*/
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public struct Support<Base> {
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/// Base object to extend.
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public let base: Base
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/// Creates extensions with base object.
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///
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/// - parameter base: Base object.
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public init(_ base: Base) {
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self.base = base
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}
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}
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/// A type that has support extensions.
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public protocol SupportCompatible {
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/// Extended type
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associatedtype CompatibleType
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/// Support extensions.
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static var support: Support<CompatibleType>.Type { get set }
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/// Support extensions.
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var support: Support<CompatibleType> { get set }
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}
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public extension SupportCompatible {
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/// Support extensions.
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static var support: Support<Self>.Type {
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get {
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Support<Self>.self
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}
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set { // swiftlint:disable:this unused_setter_value
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// this enables using Support to "mutate" base type
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}
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}
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/// Support extensions.
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var support: Support<Self> {
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get {
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Support(self)
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}
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set { // swiftlint:disable:this unused_setter_value
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// this enables using Support to "mutate" base object
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}
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}
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}
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extension NSObject: SupportCompatible {}
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