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// Copyright (C) 2020 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
#ifndef QASSOCIATIVEITERABLE_H
#define QASSOCIATIVEITERABLE_H
#include <QtCore/qiterable.h>
#include <QtCore/qvariant.h>
QT_BEGIN_NAMESPACE
class Q_CORE_EXPORT QAssociativeIterator : public QIterator<QMetaAssociation>
{
public:
using key_type = QVariant;
using mapped_type = QVariant;
using reference = QVariantRef<QAssociativeIterator>;
using pointer = QVariantPointer<QAssociativeIterator>;
QAssociativeIterator(QIterator &&it)
: QIterator(std::move(it))
{}
QVariant key() const;
QVariantRef<QAssociativeIterator> value() const;
QVariantRef<QAssociativeIterator> operator*() const;
QVariantPointer<QAssociativeIterator> operator->() const;
};
class Q_CORE_EXPORT QAssociativeConstIterator : public QConstIterator<QMetaAssociation>
{
public:
using key_type = QVariant;
using mapped_type = QVariant;
using reference = const QVariant &;
using pointer = QVariantConstPointer;
QAssociativeConstIterator(QConstIterator &&it)
: QConstIterator(std::move(it))
{}
QVariant key() const;
QVariant value() const;
QVariant operator*() const;
QVariantConstPointer operator->() const;
};
class Q_CORE_EXPORT QAssociativeIterable : public QIterable<QMetaAssociation>
{
public:
using iterator = QTaggedIterator<QAssociativeIterator, void>;
using const_iterator = QTaggedIterator<QAssociativeConstIterator, void>;
using RandomAccessIterator = QTaggedIterator<iterator, std::random_access_iterator_tag>;
using BidirectionalIterator = QTaggedIterator<iterator, std::bidirectional_iterator_tag>;
using ForwardIterator = QTaggedIterator<iterator, std::forward_iterator_tag>;
using InputIterator = QTaggedIterator<iterator, std::input_iterator_tag>;
using RandomAccessConstIterator = QTaggedIterator<const_iterator, std::random_access_iterator_tag>;
using BidirectionalConstIterator = QTaggedIterator<const_iterator, std::bidirectional_iterator_tag>;
using ForwardConstIterator = QTaggedIterator<const_iterator, std::forward_iterator_tag>;
using InputConstIterator = QTaggedIterator<const_iterator, std::input_iterator_tag>;
template<class T>
QAssociativeIterable(const T *p)
: QIterable(QMetaAssociation::fromContainer<T>(), p)
{
}
template<class T>
QAssociativeIterable(T *p)
: QIterable(QMetaAssociation::fromContainer<T>(), p)
{
}
QAssociativeIterable()
: QIterable(QMetaAssociation(), nullptr)
{
}
template<typename Pointer>
QAssociativeIterable(const QMetaAssociation &metaAssociation, Pointer iterable)
: QIterable(metaAssociation, iterable)
{
}
// ### Qt7: Pass QMetaType as value rather than const ref.
QAssociativeIterable(const QMetaAssociation &metaAssociation, const QMetaType &metaType,
void *iterable)
: QIterable(metaAssociation, metaType.alignOf(), iterable)
{
}
// ### Qt7: Pass QMetaType as value rather than const ref.
QAssociativeIterable(const QMetaAssociation &metaAssociation, const QMetaType &metaType,
const void *iterable)
: QIterable(metaAssociation, metaType.alignOf(), iterable)
{
}
QAssociativeIterable(QIterable<QMetaAssociation> &&other) : QIterable(std::move(other)) {}
QAssociativeIterable &operator=(QIterable<QMetaAssociation> &&other)
{
QIterable::operator=(std::move(other));
return *this;
}
const_iterator begin() const { return constBegin(); }
const_iterator end() const { return constEnd(); }
const_iterator constBegin() const { return const_iterator(QIterable::constBegin()); }
const_iterator constEnd() const { return const_iterator(QIterable::constEnd()); }
iterator mutableBegin() { return iterator(QIterable::mutableBegin()); }
iterator mutableEnd() { return iterator(QIterable::mutableEnd()); }
const_iterator find(const QVariant &key) const;
const_iterator constFind(const QVariant &key) const { return find(key); }
iterator mutableFind(const QVariant &key);
bool containsKey(const QVariant &key);
void insertKey(const QVariant &key);
void removeKey(const QVariant &key);
QVariant value(const QVariant &key) const;
void setValue(const QVariant &key, const QVariant &mapped);
};
template<>
inline QVariantRef<QAssociativeIterator>::operator QVariant() const
{
if (m_pointer == nullptr)
return QVariant();
const auto metaAssociation = m_pointer->metaContainer();
const QMetaType metaType(metaAssociation.mappedMetaType());
if (!metaType.isValid())
return m_pointer->key();
QVariant v(metaType);
metaAssociation.mappedAtIterator(m_pointer->constIterator(),
metaType == QMetaType::fromType<QVariant>() ? &v : v.data());
return v;
}
template<>
inline QVariantRef<QAssociativeIterator> &QVariantRef<QAssociativeIterator>::operator=(
const QVariant &value)
{
if (m_pointer == nullptr)
return *this;
const auto metaAssociation = m_pointer->metaContainer();
const QMetaType metaType(metaAssociation.mappedMetaType());
if (metaType.isValid()) {
QtPrivate::QVariantTypeCoercer coercer;
metaAssociation.setMappedAtIterator(m_pointer->constIterator(),
coercer.coerce(value, metaType));
}
return *this;
}
Q_DECLARE_TYPEINFO(QAssociativeIterable, Q_RELOCATABLE_TYPE);
Q_DECLARE_TYPEINFO(QAssociativeIterable::iterator, Q_RELOCATABLE_TYPE);
Q_DECLARE_TYPEINFO(QAssociativeIterable::const_iterator, Q_RELOCATABLE_TYPE);
QT_END_NAMESPACE
#endif // QASSOCIATIVEITERABLE_H
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