vhart

enum FilterValue {
    case string(String)
    case bool(Bool)

    func matches(value: Any) -> Bool {
        switch self {
        case .string(let stringValue):
            return (value as? String) == stringValue
        case .bool(let boolValue):
            return (value as? Bool) == boolValue

vhart

struct MyStruct {
    let name: String
    let number: Int
    var bool: Bool
}

let instance = MyStruct(name: "Korg", number: 1, bool: true)

// Referencing
let nameRef: KeyPath<MyStruct, String> = \MyStruct.name

vhart

struct Filter<Object> {
  
    init<Type>(keyPath: KeyPath<Object, Type>, matcher: @escaping (Type) -> Bool) {
        
    }
}

vhart

struct Filter<Object> {
    
    let keyPath: PartialKeyPath<Object>
    let matcher: (Any) -> Bool
  
    init<Type>(keyPath: KeyPath<Object, Type>, matcher: @escaping (Type) -> Bool) {
        self.keyPath = keyPath
        self.matcher = { value in
            guard let typedValue = value as? Type else { return false }
            return matcher(typedValue)

vhart

struct Filter<Object> {
    
    let keyPath: PartialKeyPath<Object>
    private let matcher: (Any) -> Bool
  
    init<Type>(keyPath: KeyPath<Object, Type>, matcher: @escaping (Type) -> Bool) {
        self.keyPath = keyPath
        self.matcher = { value in
            let typedValue = value as! Type
            return matcher(typedValue)