qqmljsannotation_p.h

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
#ifndef QQMLJSANNOTATION_P_H
#define QQMLJSANNOTATION_P_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
 
#include <QtCore/qglobal.h>
#include <QtCore/qhash.h>
 
#include <variant>
 
QT_BEGIN_NAMESPACE
 
struct QQQmlJSDeprecation
{
    QString reason;
};
 
struct QQmlJSAnnotation
{
    using Value = std::variant<QString, double>;
 
    QString name;
    QHash<QString, Value> bindings;
 
    bool isDeprecation() const;
    QQQmlJSDeprecation deprecation() const;
 
    friend bool operator==(const QQmlJSAnnotation &a, const QQmlJSAnnotation &b) {
        return a.name == b.name &&
               a.bindings == b.bindings;
    }
 
    friend bool operator!=(const QQmlJSAnnotation &a, const QQmlJSAnnotation &b) {
        return !(a == b);
    }
 
    friend size_t qHash(const QQmlJSAnnotation &annotation, size_t seed = 0)
    {
        QtPrivate::QHashCombine combine;
        seed = combine(seed, annotation.name);
 
        for (auto it = annotation.bindings.constBegin(); it != annotation.bindings.constEnd(); ++it) {
            size_t h = combine(seed, it.key());
            // use + to keep the result independent of the ordering of the keys
 
            const auto &var = it.value();
 
            if (var.index() == std::variant_npos)
                continue;
 
            if (std::holds_alternative<double>(var))
                seed += combine(h, std::get<double>(var));
            else if (std::holds_alternative<QString>(var))
                seed += combine(h, std::get<QString>(var));
            else
                Q_UNREACHABLE();
        }
 
        return seed;
    }
};
 
QT_END_NAMESPACE
 
#endif // QQMLJSANNOTATION_P_H