serializatioin / deserialization and tests

include/NeuralNetwork/ActivationFunction/Heaviside.h

@@ -16,12 +16,18 @@ namespace ActivationFunction {
 				return new Heaviside(lambda);
 			}
 
-			virtual std::string stringify() const override {
-				return "{ \"class\": \"NeuralNetwork::ActivationFunction::Heaviside\", \"lamba\" : "+std::to_string(lambda)+"}";
+			virtual SimpleJSON::Type::Object serialize() const override {
+				return {{"class", "NeuralNetwork::ActivationFunction::Heaviside"}, {"lambda", lambda}};
+			}
+
+			static std::unique_ptr<Heaviside> deserialize(const SimpleJSON::Type::Object &obj) {
+				return std::unique_ptr<Heaviside>(new Heaviside(obj["lambda"].as<double>()));
 			}
 
 		protected:
 			float lambda;
+
+		NEURAL_NETWORK_REGISTER_ACTIVATION_FUNCTION(NeuralNetwork::ActivationFunction::Heaviside, Heaviside::deserialize)
 	};
 }
 }