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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#pragma once
#include <QtCore/qglobal.h>
#include <QtQml/private/qtqmlglobal_p.h>
#include <memory>
#if __cplusplus > 201402L && __has_include(<optional>)
#include <optional>
#else
namespace std {
struct nullopt_t {};
constexpr nullopt_t nullopt {};
template<typename T>
class optional {
public:
optional() = default;
optional(nullopt_t) {}
optional(const T &v) : _value(v), _hasValue(true) {}
~optional() = default;
optional &operator =(nullopt_t) {
_value = T();
_hasValue = false;
return *this;
}
T operator->() { return _value; }
T operator*() { return _value; }
operator bool() const { return _hasValue; }
bool has_value() const { return _hasValue; }
T value() const { return _value; }
private:
T _value = T();
bool _hasValue = false;
};
}
#endif
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