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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 QSEQUENTIALITERABLE_H
#define QSEQUENTIALITERABLE_H
#include <QtCore/qiterable.h>
#include <QtCore/qvariant.h>
QT_BEGIN_NAMESPACE
class Q_CORE_EXPORT QSequentialIterator : public QIterator<QMetaSequence>
{
public:
using value_type = QVariant;
using reference = QVariantRef<QSequentialIterator>;
using pointer = QVariantPointer<QSequentialIterator>;
QSequentialIterator(QIterator &&it)
: QIterator(std::move(it))
{}
QVariantRef<QSequentialIterator> operator*() const;
QVariantPointer<QSequentialIterator> operator->() const;
};
class Q_CORE_EXPORT QSequentialConstIterator : public QConstIterator<QMetaSequence>
{
public:
using value_type = QVariant;
using reference = const QVariant &;
using pointer = QVariantConstPointer;
QSequentialConstIterator(QConstIterator &&it)
: QConstIterator(std::move(it))
{}
QVariant operator*() const;
QVariantConstPointer operator->() const;
};
class Q_CORE_EXPORT QSequentialIterable : public QIterable<QMetaSequence>
{
public:
using iterator = QTaggedIterator<QSequentialIterator, void>;
using const_iterator = QTaggedIterator<QSequentialConstIterator, 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>
QSequentialIterable(const T *p)
: QIterable(QMetaSequence::fromContainer<T>(), p)
{
Q_UNUSED(m_revision);
}
template<class T>
QSequentialIterable(T *p)
: QIterable(QMetaSequence::fromContainer<T>(), p)
{
}
QSequentialIterable()
: QIterable(QMetaSequence(), nullptr)
{
}
template<typename Pointer>
QSequentialIterable(const QMetaSequence &metaSequence, Pointer iterable)
: QIterable(metaSequence, iterable)
{
}
// ### Qt7: Pass QMetaType as value rather than const ref.
QSequentialIterable(const QMetaSequence &metaSequence, const QMetaType &metaType,
void *iterable)
: QIterable(metaSequence, metaType.alignOf(), iterable)
{
}
// ### Qt7: Pass QMetaType as value rather than const ref.
QSequentialIterable(const QMetaSequence &metaSequence, const QMetaType &metaType,
const void *iterable)
: QIterable(metaSequence, metaType.alignOf(), iterable)
{
}
QSequentialIterable(QIterable<QMetaSequence> &&other) : QIterable(std::move(other)) {}
QSequentialIterable &operator=(QIterable<QMetaSequence> &&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()); }
QVariant at(qsizetype idx) const;
void set(qsizetype idx, const QVariant &value);
enum Position { Unspecified, AtBegin, AtEnd };
void addValue(const QVariant &value, Position position = Unspecified);
void removeValue(Position position = Unspecified);
QMetaType valueMetaType() const;
};
template<>
inline QVariantRef<QSequentialIterator>::operator QVariant() const
{
if (m_pointer == nullptr)
return QVariant();
const QMetaType metaType(m_pointer->metaContainer().valueMetaType());
QVariant v(metaType);
void *dataPtr = metaType == QMetaType::fromType<QVariant>() ? &v : v.data();
m_pointer->metaContainer().valueAtIterator(m_pointer->constIterator(), dataPtr);
return v;
}
template<>
inline QVariantRef<QSequentialIterator> &QVariantRef<QSequentialIterator>::operator=(
const QVariant &value)
{
if (m_pointer == nullptr)
return *this;
QtPrivate::QVariantTypeCoercer coercer;
m_pointer->metaContainer().setValueAtIterator(
m_pointer->constIterator(),
coercer.coerce(value, m_pointer->metaContainer().valueMetaType()));
return *this;
}
Q_DECLARE_TYPEINFO(QSequentialIterable, Q_RELOCATABLE_TYPE);
Q_DECLARE_TYPEINFO(QSequentialIterable::iterator, Q_RELOCATABLE_TYPE);
Q_DECLARE_TYPEINFO(QSequentialIterable::const_iterator, Q_RELOCATABLE_TYPE);
QT_END_NAMESPACE
#endif // QSEQUENTIALITERABLE_H
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