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// Copyright 2024-2025, Amlal El Mahrouss (amlal@nekernel.org)
// Licensed under the Apache License, Version 2.0 (see LICENSE file)
// Official repository: https://github.com/nekernel-org/nekernel
#ifndef NEKIT_ERROROR_H
#define NEKIT_ERROROR_H
#include <NeKit/Config.h>
#include <NeKit/Ref.h>
namespace Kernel {
/// ================================================================================
/// @brief ErrorOr class for error handling.
/// ================================================================================
template <class T>
class ErrorOr final {
public:
ErrorOr() = default;
~ErrorOr() = default;
public:
using RefType = Ref<T>;
using Type = T;
using TypePtr = T*;
explicit ErrorOr(ErrorT err) : mRef(Type()), mId(err) {
// TODO: Invalidate the value of mRef to make computational evaluations false.
mRef = nullptr;
}
explicit ErrorOr(nullPtr) {}
explicit ErrorOr(TypePtr klass) : mRef(klass) {}
explicit ErrorOr(Type klass) : mRef(klass) {}
ErrorOr& operator=(const ErrorOr&) = default;
ErrorOr(const ErrorOr&) = default;
ErrorOr& operator=(const RefType& ref) {
mRef = ref;
return *this;
}
const Type& Value() { return mRef.TryLeak(); }
RefType& Leak() { return mRef; }
ErrorT Error() { return mId; }
/// @note DO NOT MAKE THIS EXPLICIT! IT WILL BREAK THE COMPILATION.
explicit operator bool() { return mRef.Leak(); }
BOOL HasError() { return this->mId < kErrorSuccess; }
private:
RefType mRef;
ErrorT mId{0};
};
using ErrorOrAny = ErrorOr<voidPtr>;
} // namespace Kernel
#endif
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