/* ========================================

  Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.

======================================== */

#ifndef _INC_FUNCTION_H_
#define _INC_FUNCTION_H_

#include <NeKit/Defines.h>
#include <NeKit/ErrorOr.h>

namespace Kernel {
template <typename T, typename... Args>
class Function final {
 public:
  Function() = default;

 public:
  explicit Function(T (*Fn)(Args... args)) : fFn(Fn) {}

  ~Function() = default;

  Function& operator=(const Function&) = default;
  Function(const Function&)            = default;

  template <typename... XArgs>
  T operator()(Args&&... args) {
    return fFn(args...);
  }

  template <typename... XArgs>
  T Call(Args&&... args) {
    return fFn(args...);
  }

  operator bool() { return fFn; }

  bool operator!() { return !fFn; }

 private:
  T(*fFn)
  (Args... args);
};

template <typename T, typename... Args>
using FunctionOr = ErrorOr<Function<T, Args...>>;
}  // namespace Kernel

#endif  // !_INC_FUNCTION_H__