Function.h

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/* ========================================
 
  Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
 
======================================== */
 
#pragma once
 
#include <NeKit/Config.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){nullptr};
};
 
template <typename T, typename... Args>
using FunctionOr = ErrorOr<Function<T, Args...>>;
}  // namespace Kernel