Property wrapper - Assume equal until modified; use `UIConfigurationColorTransformer` in custom structs

AssumeEqualUntilModified.swift

/// Customizes the behavior of automatically-generated `Equatable` and `Hashable` conformances.
@propertyWrapper
public struct AssumeEqualUntilModified<Wrapped> {

    var modificationCount = 0

    public var wrappedValue: Wrapped {
        didSet {
            modificationCount += 1
        }
    }

    public init(wrappedValue: Wrapped) {
        self.wrappedValue = wrappedValue
    }

}

extension AssumeEqualUntilModified: Hashable {

    public static func == (lhs: Self, rhs: Self) -> Bool {
        lhs.modificationCount == 0 && rhs.modificationCount == 0
    }

    public func hash(into hasher: inout Hasher) {
        hasher.combine(modificationCount)
    }

}

Example.swift

struct MyConfiguration: Hashable {
    var color: UIColor?
    @AssumeEqualUntilModified var colorTransformer: UIConfigurationColorTransformer?
}