AllowDecodeFailure.swift

import Foundation

/// Allows a property to fail decoding, defaulting to nil instead of surfacing the error.
@propertyWrapper
struct AllowDecodeFailure<Wrapped>: Codable where Wrapped: Codable {
	var wrappedValue: Wrapped?
	
	init() {
		self.wrappedValue = nil
	}
	
	init(wrappedValue: Wrapped?) {
		self.wrappedValue = wrappedValue
	}
	
	init(from decoder: Decoder) throws {
		let container = try decoder.singleValueContainer()
		self.wrappedValue = try? container.decode(Wrapped.self)
	}
}

extension AllowDecodeFailure: Equatable where Wrapped: Equatable {}