Make classRef required

Author: j-f1

Sources/JavaScriptKit/JSValueConvertible.swift

@@ -1,14 +1,13 @@
 import _CJavaScriptKit
 
 public protocol JSBridgedType: JSValueCodable, CustomStringConvertible {
-    static var classRef: JSFunctionRef? { get }
+    static var classRef: JSFunctionRef { get }
 
     var objectRef: JSObjectRef { get }
     init(objectRef: JSObjectRef)
 }
 
 extension JSBridgedType {
-  static var classRef: JSFunctionRef? { nil }
   public var description: String {
     return objectRef.toString!().fromJSValue()
   }
@@ -29,10 +28,7 @@ public typealias JSValueCodable = JSValueEncodable & JSValueDecodable
 extension JSBridgedType {
     public static func canDecode(from jsValue: JSValue) -> Bool {
         if let object = jsValue.object {
-            if let constructor = Self.classRef {
-                return JSObjectRef.instanceof(object, constructor: constructor)
-            }
-            return true
+            return JSObjectRef.instanceof(object, constructor: Self.classRef)
         }
         return false
     }

Sources/JavaScriptKit/Support.swift

@@ -234,7 +234,7 @@ public func staticCast<Type: JSBridgedType>(_ ref: JSBridgedType) -> Type {
 }
 
 public func dynamicCast<Type: JSBridgedType>(_ ref: JSBridgedType) -> Type? {
-    guard let constructor = Type.classRef, JSObjectRef.instanceof(ref.objectRef, constructor: constructor) else {
+    guard JSObjectRef.instanceof(ref.objectRef, constructor: Type.classRef) else {
         return nil
     }
     return staticCast(ref)