diff options
Diffstat (limited to 'src/corelib/tools/qlist.h')
| -rw-r--r-- | src/corelib/tools/qlist.h | 903 |
1 files changed, 537 insertions, 366 deletions
diff --git a/src/corelib/tools/qlist.h b/src/corelib/tools/qlist.h index 5bdc993b67..89e0e3f380 100644 --- a/src/corelib/tools/qlist.h +++ b/src/corelib/tools/qlist.h @@ -1,42 +1,6 @@ -/**************************************************************************** -** -** Copyright (C) 2020 The Qt Company Ltd. -** Copyright (C) 2019 Intel Corporation -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtCore module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2020 The Qt Company Ltd. +// Copyright (C) 2019 Intel Corporation +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only #ifndef QLIST_H #define QLIST_H @@ -45,12 +9,16 @@ #include <QtCore/qnamespace.h> #include <QtCore/qhashfunctions.h> #include <QtCore/qiterator.h> +#include <QtCore/qcontainertools_impl.h> +#include <QtCore/qnamespace.h> #include <functional> #include <limits> #include <initializer_list> #include <type_traits> +class tst_QList; + QT_BEGIN_NAMESPACE namespace QtPrivate { @@ -58,62 +26,245 @@ namespace QtPrivate { template <typename V, typename U> qsizetype lastIndexOf(const QList<V> &list, const U &u, qsizetype from) noexcept; } -template <typename T> struct QListSpecialMethods +template <typename T> struct QListSpecialMethodsBase { protected: - ~QListSpecialMethods() = default; + ~QListSpecialMethodsBase() = default; + + using Self = QList<T>; + Self *self() { return static_cast<Self *>(this); } + const Self *self() const { return static_cast<const Self *>(this); } + public: - qsizetype indexOf(const T &t, qsizetype from = 0) const noexcept; - qsizetype lastIndexOf(const T &t, qsizetype from = -1) const noexcept; + template <typename AT = T> + qsizetype indexOf(const AT &t, qsizetype from = 0) const noexcept; + template <typename AT = T> + qsizetype lastIndexOf(const AT &t, qsizetype from = -1) const noexcept; - bool contains(const T &t) const noexcept + template <typename AT = T> + bool contains(const AT &t) const noexcept { - return indexOf(t) != -1; + return self()->indexOf(t) != -1; } }; +template <typename T> struct QListSpecialMethods : QListSpecialMethodsBase<T> +{ +protected: + ~QListSpecialMethods() = default; +public: + using QListSpecialMethodsBase<T>::indexOf; + using QListSpecialMethodsBase<T>::lastIndexOf; + using QListSpecialMethodsBase<T>::contains; +}; template <> struct QListSpecialMethods<QByteArray>; template <> struct QListSpecialMethods<QString>; +#if !defined(QT_STRICT_QLIST_ITERATORS) && (QT_VERSION >= QT_VERSION_CHECK(6, 6, 0)) && !defined(Q_OS_WIN) +#define QT_STRICT_QLIST_ITERATORS +#endif + +#ifdef Q_QDOC // define QVector for QDoc +template<typename T> class QVector : public QList<T> {}; +#endif + template <typename T> class QList #ifndef Q_QDOC : public QListSpecialMethods<T> #endif { - typedef QTypedArrayData<T> Data; - typedef QArrayDataOps<T> DataOps; - typedef QArrayDataPointer<T> DataPointer; + using Data = QTypedArrayData<T>; + using DataOps = QArrayDataOps<T>; + using DataPointer = QArrayDataPointer<T>; class DisableRValueRefs {}; + friend class ::tst_QList; + DataPointer d; template <typename V, typename U> friend qsizetype QtPrivate::indexOf(const QList<V> &list, const U &u, qsizetype from) noexcept; template <typename V, typename U> friend qsizetype QtPrivate::lastIndexOf(const QList<V> &list, const U &u, qsizetype from) noexcept; + // This alias prevents the QtPrivate namespace from being exposed into the docs. + template <typename InputIterator> + using if_input_iterator = QtPrivate::IfIsInputIterator<InputIterator>; public: - typedef T Type; - typedef T value_type; - typedef value_type *pointer; - typedef const value_type *const_pointer; - typedef value_type &reference; - typedef const value_type &const_reference; - typedef qsizetype size_type; - typedef qptrdiff difference_type; - typedef typename Data::iterator iterator; - typedef typename Data::const_iterator const_iterator; - typedef iterator Iterator; - typedef const_iterator ConstIterator; - typedef std::reverse_iterator<iterator> reverse_iterator; - typedef std::reverse_iterator<const_iterator> const_reverse_iterator; - typedef typename DataPointer::parameter_type parameter_type; + using Type = T; + using value_type = T; + using pointer = T *; + using const_pointer = const T *; + using reference = T &; + using const_reference = const T &; + using size_type = qsizetype; + using difference_type = qptrdiff; +#ifndef Q_QDOC + using parameter_type = typename DataPointer::parameter_type; using rvalue_ref = typename std::conditional<DataPointer::pass_parameter_by_value, DisableRValueRefs, T &&>::type; +#else // simplified aliases for QDoc + using parameter_type = const T &; + using rvalue_ref = T &&; +#endif + + class const_iterator; + class iterator { + friend class QList<T>; + friend class const_iterator; + T *i = nullptr; +#ifdef QT_STRICT_QLIST_ITERATORS + inline constexpr explicit iterator(T *n) : i(n) {} +#endif + + public: + using difference_type = qsizetype; + using value_type = T; +#ifdef QT_COMPILER_HAS_LWG3346 + using iterator_concept = std::contiguous_iterator_tag; + using element_type = value_type; +#endif + using iterator_category = std::random_access_iterator_tag; + using pointer = T *; + using reference = T &; + + inline constexpr iterator() = default; +#ifndef QT_STRICT_QLIST_ITERATORS + inline constexpr explicit iterator(T *n) : i(n) {} +#endif + inline T &operator*() const { return *i; } + inline T *operator->() const { return i; } + inline T &operator[](qsizetype j) const { return *(i + j); } + inline constexpr bool operator==(iterator o) const { return i == o.i; } + inline constexpr bool operator!=(iterator o) const { return i != o.i; } + inline constexpr bool operator<(iterator other) const { return i < other.i; } + inline constexpr bool operator<=(iterator other) const { return i <= other.i; } + inline constexpr bool operator>(iterator other) const { return i > other.i; } + inline constexpr bool operator>=(iterator other) const { return i >= other.i; } + inline constexpr bool operator==(const_iterator o) const { return i == o.i; } + inline constexpr bool operator!=(const_iterator o) const { return i != o.i; } + inline constexpr bool operator<(const_iterator other) const { return i < other.i; } + inline constexpr bool operator<=(const_iterator other) const { return i <= other.i; } + inline constexpr bool operator>(const_iterator other) const { return i > other.i; } + inline constexpr bool operator>=(const_iterator other) const { return i >= other.i; } + inline constexpr bool operator==(pointer p) const { return i == p; } + inline constexpr bool operator!=(pointer p) const { return i != p; } + inline iterator &operator++() { ++i; return *this; } + inline iterator operator++(int) { auto copy = *this; ++*this; return copy; } + inline iterator &operator--() { --i; return *this; } + inline iterator operator--(int) { auto copy = *this; --*this; return copy; } + inline qsizetype operator-(iterator j) const { return i - j.i; } +#if QT_DEPRECATED_SINCE(6, 3) && !defined(QT_STRICT_QLIST_ITERATORS) + QT_DEPRECATED_VERSION_X_6_3("Use operator* or operator-> rather than relying on " + "the implicit conversion between a QList/QVector::iterator " + "and a raw pointer") + inline operator T*() const { return i; } + + template <typename Int> std::enable_if_t<std::is_integral_v<Int>, iterator> + &operator+=(Int j) { i+=j; return *this; } + template <typename Int> std::enable_if_t<std::is_integral_v<Int>, iterator> + &operator-=(Int j) { i-=j; return *this; } + template <typename Int> std::enable_if_t<std::is_integral_v<Int>, iterator> + operator+(Int j) const { return iterator(i+j); } + template <typename Int> std::enable_if_t<std::is_integral_v<Int>, iterator> + operator-(Int j) const { return iterator(i-j); } + template <typename Int> friend std::enable_if_t<std::is_integral_v<Int>, iterator> + operator+(Int j, iterator k) { return k + j; } +#else + inline iterator &operator+=(qsizetype j) { i += j; return *this; } + inline iterator &operator-=(qsizetype j) { i -= j; return *this; } + inline iterator operator+(qsizetype j) const { return iterator(i + j); } + inline iterator operator-(qsizetype j) const { return iterator(i - j); } + friend inline iterator operator+(qsizetype j, iterator k) { return k + j; } +#endif + }; + + class const_iterator { + friend class QList<T>; + friend class iterator; + const T *i = nullptr; +#ifdef QT_STRICT_QLIST_ITERATORS + inline constexpr explicit const_iterator(const T *n) : i(n) {} +#endif + + public: + using difference_type = qsizetype; + using value_type = T; +#ifdef QT_COMPILER_HAS_LWG3346 + using iterator_concept = std::contiguous_iterator_tag; + using element_type = const value_type; +#endif + using iterator_category = std::random_access_iterator_tag; + using pointer = const T *; + using reference = const T &; + + inline constexpr const_iterator() = default; +#ifndef QT_STRICT_QLIST_ITERATORS + inline constexpr explicit const_iterator(const T *n) : i(n) {} +#endif + inline constexpr const_iterator(iterator o): i(o.i) {} + inline const T &operator*() const { return *i; } + inline const T *operator->() const { return i; } + inline const T &operator[](qsizetype j) const { return *(i + j); } + inline constexpr bool operator==(const_iterator o) const { return i == o.i; } + inline constexpr bool operator!=(const_iterator o) const { return i != o.i; } + inline constexpr bool operator<(const_iterator other) const { return i < other.i; } + inline constexpr bool operator<=(const_iterator other) const { return i <= other.i; } + inline constexpr bool operator>(const_iterator other) const { return i > other.i; } + inline constexpr bool operator>=(const_iterator other) const { return i >= other.i; } + inline constexpr bool operator==(iterator o) const { return i == o.i; } + inline constexpr bool operator!=(iterator o) const { return i != o.i; } + inline constexpr bool operator<(iterator other) const { return i < other.i; } + inline constexpr bool operator<=(iterator other) const { return i <= other.i; } + inline constexpr bool operator>(iterator other) const { return i > other.i; } + inline constexpr bool operator>=(iterator other) const { return i >= other.i; } + inline constexpr bool operator==(pointer p) const { return i == p; } + inline constexpr bool operator!=(pointer p) const { return i != p; } + inline const_iterator &operator++() { ++i; return *this; } + inline const_iterator operator++(int) { auto copy = *this; ++*this; return copy; } + inline const_iterator &operator--() { --i; return *this; } + inline const_iterator operator--(int) { auto copy = *this; --*this; return copy; } + inline qsizetype operator-(const_iterator j) const { return i - j.i; } +#if QT_DEPRECATED_SINCE(6, 3) && !defined(QT_STRICT_QLIST_ITERATORS) + QT_DEPRECATED_VERSION_X_6_3("Use operator* or operator-> rather than relying on " + "the implicit conversion between a QList/QVector::const_iterator " + "and a raw pointer") + inline operator const T*() const { return i; } + + template <typename Int> std::enable_if_t<std::is_integral_v<Int>, const_iterator> + &operator+=(Int j) { i+=j; return *this; } + template <typename Int> std::enable_if_t<std::is_integral_v<Int>, const_iterator> + &operator-=(Int j) { i-=j; return *this; } + template <typename Int> std::enable_if_t<std::is_integral_v<Int>, const_iterator> + operator+(Int j) const { return const_iterator(i+j); } + template <typename Int> std::enable_if_t<std::is_integral_v<Int>, const_iterator> + operator-(Int j) const { return const_iterator(i-j); } + template <typename Int> friend std::enable_if_t<std::is_integral_v<Int>, const_iterator> + operator+(Int j, const_iterator k) { return k + j; } +#else + inline const_iterator &operator+=(qsizetype j) { i += j; return *this; } + inline const_iterator &operator-=(qsizetype j) { i -= j; return *this; } + inline const_iterator operator+(qsizetype j) const { return const_iterator(i + j); } + inline const_iterator operator-(qsizetype j) const { return const_iterator(i - j); } + friend inline const_iterator operator+(qsizetype j, const_iterator k) { return k + j; } +#endif + }; + using Iterator = iterator; + using ConstIterator = const_iterator; + using reverse_iterator = std::reverse_iterator<iterator>; + using const_reverse_iterator = std::reverse_iterator<const_iterator>; private: - void resize_internal(qsizetype i, Qt::Initialization); + void resize_internal(qsizetype i); bool isValidIterator(const_iterator i) const { const std::less<const T*> less = {}; - return !less(d->end(), i) && !less(i, d->begin()); + return !less(d->end(), i.i) && !less(i.i, d->begin()); + } + + void verify([[maybe_unused]] qsizetype pos = 0, [[maybe_unused]] qsizetype n = 1) const + { + Q_ASSERT(pos >= 0); + Q_ASSERT(pos <= size()); + Q_ASSERT(n >= 0); + Q_ASSERT(n <= size() - pos); } public: QList(DataPointer dd) noexcept @@ -124,20 +275,20 @@ public: public: QList() = default; explicit QList(qsizetype size) - : d(Data::allocate(size)) + : d(size) { if (size) d->appendInitialize(size); } - QList(qsizetype size, const T &t) - : d(Data::allocate(size)) + QList(qsizetype size, parameter_type t) + : d(size) { if (size) d->copyAppend(size, t); } inline QList(std::initializer_list<T> args) - : d(Data::allocate(args.size())) + : d(qsizetype(args.size())) { if (args.size()) d->copyAppend(args.begin(), args.end()); @@ -145,25 +296,28 @@ public: QList<T> &operator=(std::initializer_list<T> args) { - d = DataPointer(Data::allocate(args.size())); - if (args.size()) - d->copyAppend(args.begin(), args.end()); - return *this; - } - template <typename InputIterator, QtPrivate::IfIsForwardIterator<InputIterator> = true> - QList(InputIterator i1, InputIterator i2) - { - const auto distance = std::distance(i1, i2); - if (distance) { - d = DataPointer(Data::allocate(distance)); - d->copyAppend(i1, i2); - } + return assign(args); } - template <typename InputIterator, QtPrivate::IfIsNotForwardIterator<InputIterator> = true> + template <typename InputIterator, if_input_iterator<InputIterator> = true> QList(InputIterator i1, InputIterator i2) { - std::copy(i1, i2, std::back_inserter(*this)); + if constexpr (!std::is_convertible_v<typename std::iterator_traits<InputIterator>::iterator_category, std::forward_iterator_tag>) { + std::copy(i1, i2, std::back_inserter(*this)); + } else { + const auto distance = std::distance(i1, i2); + if (distance) { + d = DataPointer(qsizetype(distance)); + // appendIteratorRange can deal with contiguous iterators on its own, + // this is an optimization for C++17 code. + if constexpr (std::is_same_v<std::decay_t<InputIterator>, iterator> || + std::is_same_v<std::decay_t<InputIterator>, const_iterator>) { + d->copyAppend(i1.i, i2.i); + } else { + d->appendIteratorRange(i1, i2); + } + } + } } // This constructor is here for compatibility with QStringList in Qt 5, that has a QStringList(const QString &) constructor @@ -171,14 +325,74 @@ public: inline explicit QList(const String &str) { append(str); } + QList(qsizetype size, Qt::Initialization) + : d(size) + { + if (size) + d->appendUninitialized(size); + } + // compiler-generated special member functions are fine! - void swap(QList<T> &other) noexcept { qSwap(d, other.d); } + void swap(QList &other) noexcept { d.swap(other.d); } + +#ifndef Q_QDOC + template <typename U = T> + QTypeTraits::compare_eq_result_container<QList, U> operator==(const QList &other) const + { + if (size() != other.size()) + return false; + if (begin() == other.begin()) + return true; + + // do element-by-element comparison + return d->compare(data(), other.data(), size()); + } + template <typename U = T> + QTypeTraits::compare_eq_result_container<QList, U> operator!=(const QList &other) const + { + return !(*this == other); + } + + template <typename U = T> + QTypeTraits::compare_lt_result_container<QList, U> operator<(const QList &other) const + noexcept(noexcept(std::lexicographical_compare<typename QList<U>::const_iterator, + typename QList::const_iterator>( + std::declval<QList<U>>().begin(), std::declval<QList<U>>().end(), + other.begin(), other.end()))) + { + return std::lexicographical_compare(begin(), end(), + other.begin(), other.end()); + } + + template <typename U = T> + QTypeTraits::compare_lt_result_container<QList, U> operator>(const QList &other) const + noexcept(noexcept(other < std::declval<QList<U>>())) + { + return other < *this; + } - template <typename U> - friend QTypeTraits::compare_eq_result<U> operator==(const QList<U> &l, const QList<U> &r); - template <typename U> - friend QTypeTraits::compare_eq_result<U> operator!=(const QList<U> &l, const QList<U> &r); + template <typename U = T> + QTypeTraits::compare_lt_result_container<QList, U> operator<=(const QList &other) const + noexcept(noexcept(other < std::declval<QList<U>>())) + { + return !(other < *this); + } + + template <typename U = T> + QTypeTraits::compare_lt_result_container<QList, U> operator>=(const QList &other) const + noexcept(noexcept(std::declval<QList<U>>() < other)) + { + return !(*this < other); + } +#else + bool operator==(const QList &other) const; + bool operator!=(const QList &other) const; + bool operator<(const QList &other) const; + bool operator>(const QList &other) const; + bool operator<=(const QList &other) const; + bool operator>=(const QList &other) const; +#endif // Q_QDOC qsizetype size() const noexcept { return d->size; } qsizetype count() const noexcept { return size(); } @@ -188,16 +402,22 @@ public: void resize(qsizetype size) { - resize_internal(size, Qt::Uninitialized); + resize_internal(size); if (size > this->size()) d->appendInitialize(size); } void resize(qsizetype size, parameter_type c) { - resize_internal(size, Qt::Uninitialized); + resize_internal(size); if (size > this->size()) d->copyAppend(size - this->size(), c); } + void resizeForOverwrite(qsizetype size) + { + resize_internal(size); + if (size > this->size()) + d->appendUninitialized(size); + } inline qsizetype capacity() const { return qsizetype(d->constAllocatedCapacity()); } void reserve(qsizetype size); @@ -216,7 +436,7 @@ public: return; if (d->needsDetach()) { // must allocate memory - DataPointer detached(Data::allocate(d.allocatedCapacity(), d->detachFlags())); + DataPointer detached(d.allocatedCapacity()); d.swap(detached); } else { d->truncate(0); @@ -231,24 +451,42 @@ public: reference operator[](qsizetype i) { Q_ASSERT_X(size_t(i) < size_t(d->size), "QList::operator[]", "index out of range"); - detach(); + // don't detach() here, we detach in data below: return data()[i]; } const_reference operator[](qsizetype i) const noexcept { return at(i); } - void append(const_reference t) - { append(const_iterator(std::addressof(t)), const_iterator(std::addressof(t)) + 1); } + void append(parameter_type t) { emplaceBack(t); } void append(const_iterator i1, const_iterator i2); - void append(rvalue_ref t) { emplaceBack(std::move(t)); } - void append(const QList<T> &l) { append(l.constBegin(), l.constEnd()); } + void append(rvalue_ref t) + { + if constexpr (DataPointer::pass_parameter_by_value) { + Q_UNUSED(t); + } else { + emplaceBack(std::move(t)); + } + } + void append(const QList<T> &l) + { + append(l.constBegin(), l.constEnd()); + } void append(QList<T> &&l); - void prepend(rvalue_ref t); - void prepend(const T &t); + void prepend(rvalue_ref t) { + if constexpr (DataPointer::pass_parameter_by_value) { + Q_UNUSED(t); + } else { + emplaceFront(std::move(t)); + } + } + void prepend(parameter_type t) { emplaceFront(t); } + + template<typename... Args> + inline reference emplaceBack(Args &&... args); template <typename ...Args> - reference emplaceBack(Args&&... args) { return *emplace(count(), std::forward<Args>(args)...); } + inline reference emplaceFront(Args&&... args); iterator insert(qsizetype i, parameter_type t) - { return insert(i, 1, t); } + { return emplace(i, t); } iterator insert(qsizetype i, qsizetype n, parameter_type t); iterator insert(const_iterator before, parameter_type t) { @@ -265,7 +503,28 @@ public: Q_ASSERT_X(isValidIterator(before), "QList::insert", "The specified iterator argument 'before' is invalid"); return insert(std::distance(constBegin(), before), std::move(t)); } - iterator insert(qsizetype i, rvalue_ref t) { return emplace(i, std::move(t)); } + iterator insert(qsizetype i, rvalue_ref t) { + if constexpr (DataPointer::pass_parameter_by_value) { + Q_UNUSED(i); + Q_UNUSED(t); + return end(); + } else { + return emplace(i, std::move(t)); + } + } + + QList &assign(qsizetype n, parameter_type t) + { + Q_ASSERT(n >= 0); + return fill(t, n); + } + + template <typename InputIterator, if_input_iterator<InputIterator> = true> + QList &assign(InputIterator first, InputIterator last) + { d.assign(first, last); return *this; } + + QList &assign(std::initializer_list<T> l) + { return assign(l.begin(), l.end()); } template <typename ...Args> iterator emplace(const_iterator before, Args&&... args) @@ -281,59 +540,72 @@ public: iterator insert( const_iterator pos, InputIt first, InputIt last ); iterator insert( const_iterator pos, std::initializer_list<T> ilist ); #endif - void replace(qsizetype i, const T &t) + void replace(qsizetype i, parameter_type t) { Q_ASSERT_X(i >= 0 && i < d->size, "QList<T>::replace", "index out of range"); - const T copy(t); - data()[i] = copy; + DataPointer oldData; + d.detach(&oldData); + d.data()[i] = t; } void replace(qsizetype i, rvalue_ref t) { - Q_ASSERT_X(i >= 0 && i < d->size, "QList<T>::replace", "index out of range"); - const T copy(std::move(t)); - data()[i] = std::move(copy); + if constexpr (DataPointer::pass_parameter_by_value) { + Q_UNUSED(i); + Q_UNUSED(t); + } else { + Q_ASSERT_X(i >= 0 && i < d->size, "QList<T>::replace", "index out of range"); + DataPointer oldData; + d.detach(&oldData); + d.data()[i] = std::move(t); + } } void remove(qsizetype i, qsizetype n = 1); - void removeFirst() { Q_ASSERT(!isEmpty()); remove(0); } - void removeLast() { Q_ASSERT(!isEmpty()); remove(size() - 1); } - value_type takeFirst() { Q_ASSERT(!isEmpty()); value_type v = std::move(first()); remove(0); return v; } - value_type takeLast() { Q_ASSERT(!isEmpty()); value_type v = std::move(last()); remove(size() - 1); return v; } + void removeFirst() noexcept; + void removeLast() noexcept; + value_type takeFirst() { Q_ASSERT(!isEmpty()); value_type v = std::move(first()); d->eraseFirst(); return v; } + value_type takeLast() { Q_ASSERT(!isEmpty()); value_type v = std::move(last()); d->eraseLast(); return v; } QList<T> &fill(parameter_type t, qsizetype size = -1); +#ifndef Q_QDOC using QListSpecialMethods<T>::contains; using QListSpecialMethods<T>::indexOf; using QListSpecialMethods<T>::lastIndexOf; +#else + template <typename AT> + qsizetype indexOf(const AT &t, qsizetype from = 0) const noexcept; + template <typename AT> + qsizetype lastIndexOf(const AT &t, qsizetype from = -1) const noexcept; + template <typename AT> + bool contains(const AT &t) const noexcept; +#endif - qsizetype count(const T &t) const noexcept + template <typename AT = T> + qsizetype count(const AT &t) const noexcept { - return qsizetype(std::count(&*cbegin(), &*cend(), t)); + return qsizetype(std::count(data(), data() + size(), t)); } - // QList compatibility void removeAt(qsizetype i) { remove(i); } - qsizetype removeAll(const T &t) - { - const const_iterator ce = this->cend(), cit = std::find(this->cbegin(), ce, t); - if (cit == ce) - return 0; - qsizetype index = cit - this->cbegin(); - // next operation detaches, so ce, cit, t may become invalidated: - const T tCopy = t; - const iterator e = end(), it = std::remove(begin() + index, e, tCopy); - const qsizetype result = std::distance(it, e); - erase(it, e); - return result; - } - bool removeOne(const T &t) - { - const qsizetype i = indexOf(t); - if (i < 0) - return false; - remove(i); - return true; + template <typename AT = T> + qsizetype removeAll(const AT &t) + { + return QtPrivate::sequential_erase_with_copy(*this, t); + } + + template <typename AT = T> + bool removeOne(const AT &t) + { + return QtPrivate::sequential_erase_one(*this, t); + } + + template <typename Predicate> + qsizetype removeIf(Predicate pred) + { + return QtPrivate::sequential_erase_if(*this, pred); } + T takeAt(qsizetype i) { T t = std::move((*this)[i]); remove(i); return t; } void move(qsizetype from, qsizetype to) { @@ -350,15 +622,15 @@ public: } // STL-style - iterator begin() { detach(); return d->begin(); } - iterator end() { detach(); return d->end(); } - - const_iterator begin() const noexcept { return d->constBegin(); } - const_iterator end() const noexcept { return d->constEnd(); } - const_iterator cbegin() const noexcept { return d->constBegin(); } - const_iterator cend() const noexcept { return d->constEnd(); } - const_iterator constBegin() const noexcept { return d->constBegin(); } - const_iterator constEnd() const noexcept { return d->constEnd(); } + iterator begin() { detach(); return iterator(d->begin()); } + iterator end() { detach(); return iterator(d->end()); } + + const_iterator begin() const noexcept { return const_iterator(d->constBegin()); } + const_iterator end() const noexcept { return const_iterator(d->constEnd()); } + const_iterator cbegin() const noexcept { return const_iterator(d->constBegin()); } + const_iterator cend() const noexcept { return const_iterator(d->constEnd()); } + const_iterator constBegin() const noexcept { return const_iterator(d->constBegin()); } + const_iterator constEnd() const noexcept { return const_iterator(d->constEnd()); } reverse_iterator rbegin() { return reverse_iterator(end()); } reverse_iterator rend() { return reverse_iterator(begin()); } const_reverse_iterator rbegin() const noexcept { return const_reverse_iterator(end()); } @@ -371,40 +643,26 @@ public: // more Qt inline T& first() { Q_ASSERT(!isEmpty()); return *begin(); } - inline const T &first() const { Q_ASSERT(!isEmpty()); return *begin(); } - inline const T &constFirst() const { Q_ASSERT(!isEmpty()); return *begin(); } + inline const T &first() const noexcept { Q_ASSERT(!isEmpty()); return *begin(); } + inline const T &constFirst() const noexcept { Q_ASSERT(!isEmpty()); return *begin(); } inline T& last() { Q_ASSERT(!isEmpty()); return *(end()-1); } - inline const T &last() const { Q_ASSERT(!isEmpty()); return *(end()-1); } - inline const T &constLast() const { Q_ASSERT(!isEmpty()); return *(end()-1); } - inline bool startsWith(const T &t) const { return !isEmpty() && first() == t; } - inline bool endsWith(const T &t) const { return !isEmpty() && last() == t; } + inline const T &last() const noexcept { Q_ASSERT(!isEmpty()); return *(end()-1); } + inline const T &constLast() const noexcept { Q_ASSERT(!isEmpty()); return *(end()-1); } + inline bool startsWith(parameter_type t) const { return !isEmpty() && first() == t; } + inline bool endsWith(parameter_type t) const { return !isEmpty() && last() == t; } QList<T> mid(qsizetype pos, qsizetype len = -1) const; QList<T> first(qsizetype n) const - { - Q_ASSERT(size_t(n) <= size_t(size())); - return QList<T>(begin(), begin() + n); - } + { verify(0, n); return QList<T>(begin(), begin() + n); } QList<T> last(qsizetype n) const - { - Q_ASSERT(size_t(n) <= size_t(size())); - return QList<T>(end() - n, end()); - } + { verify(0, n); return QList<T>(end() - n, end()); } QList<T> sliced(qsizetype pos) const - { - Q_ASSERT(size_t(pos) <= size_t(size())); - return QList<T>(begin() + pos, end()); - } + { verify(pos, 0); return QList<T>(begin() + pos, end()); } QList<T> sliced(qsizetype pos, qsizetype n) const - { - Q_ASSERT(size_t(pos) <= size_t(size())); - Q_ASSERT(n >= 0); - Q_ASSERT(pos + n <= size()); - return QList<T>(begin() + pos, begin() + pos + n); - } + { verify(pos, n); return QList<T>(begin() + pos, begin() + pos + n); } T value(qsizetype i) const { return value(i, T()); } - T value(qsizetype i, const T &defaultValue) const; + T value(qsizetype i, parameter_type defaultValue) const; void swapItemsAt(qsizetype i, qsizetype j) { Q_ASSERT_X(i >= 0 && i < size() && j >= 0 && j < size(), @@ -414,34 +672,42 @@ public: } // STL compatibility - inline void push_back(const T &t) { append(t); } + inline void push_back(parameter_type t) { append(t); } void push_back(rvalue_ref t) { append(std::move(t)); } void push_front(rvalue_ref t) { prepend(std::move(t)); } - inline void push_front(const T &t) { prepend(t); } - void pop_back() { removeLast(); } - void pop_front() { removeFirst(); } + inline void push_front(parameter_type t) { prepend(t); } + void pop_back() noexcept { removeLast(); } + void pop_front() noexcept { removeFirst(); } template <typename ...Args> reference emplace_back(Args&&... args) { return emplaceBack(std::forward<Args>(args)...); } - inline bool empty() const + inline bool empty() const noexcept { return d->size == 0; } inline reference front() { return first(); } - inline const_reference front() const { return first(); } + inline const_reference front() const noexcept { return first(); } inline reference back() { return last(); } - inline const_reference back() const { return last(); } + inline const_reference back() const noexcept { return last(); } void shrink_to_fit() { squeeze(); } + static qsizetype max_size() noexcept + { + return Data::max_size(); + } // comfort - QList<T> &operator+=(const QList<T> &l) { append(l.cbegin(), l.cend()); return *this; } + QList<T> &operator+=(const QList<T> &l) { append(l); return *this; } QList<T> &operator+=(QList<T> &&l) { append(std::move(l)); return *this; } - inline QList<T> operator+(const QList<T> &l) const + inline QList<T> operator+(const QList<T> &l) const & { QList n = *this; n += l; return n; } - inline QList<T> operator+(QList<T> &&l) const + QList<T> operator+(const QList<T> &l) && + { return std::move(*this += l); } + inline QList<T> operator+(QList<T> &&l) const & { QList n = *this; n += std::move(l); return n; } - inline QList<T> &operator+=(const T &t) + QList<T> operator+(QList<T> &&l) && + { return std::move(*this += std::move(l)); } + inline QList<T> &operator+=(parameter_type t) { append(t); return *this; } - inline QList<T> &operator<< (const T &t) + inline QList<T> &operator<< (parameter_type t) { append(t); return *this; } inline QList<T> &operator<<(const QList<T> &l) { *this += l; return *this; } @@ -453,43 +719,34 @@ public: { append(std::move(t)); return *this; } // Consider deprecating in 6.4 or later - static QList<T> fromList(const QList<T> &list) { return list; } - QList<T> toList() const { return *this; } + static QList<T> fromList(const QList<T> &list) noexcept { return list; } + QList<T> toList() const noexcept { return *this; } - static inline QList<T> fromVector(const QList<T> &vector) { return vector; } - inline QList<T> toVector() const { return *this; } + static inline QList<T> fromVector(const QList<T> &vector) noexcept { return vector; } + inline QList<T> toVector() const noexcept { return *this; } template<qsizetype N> - static QList<T> fromReadOnlyData(const T (&t)[N]) + static QList<T> fromReadOnlyData(const T (&t)[N]) noexcept { return QList<T>({ nullptr, const_cast<T *>(t), N }); } }; -#if defined(__cpp_deduction_guides) && __cpp_deduction_guides >= 201606 template <typename InputIterator, typename ValueType = typename std::iterator_traits<InputIterator>::value_type, QtPrivate::IfIsInputIterator<InputIterator> = true> QList(InputIterator, InputIterator) -> QList<ValueType>; -#endif template <typename T> -inline void QList<T>::resize_internal(qsizetype newSize, Qt::Initialization) +inline void QList<T>::resize_internal(qsizetype newSize) { Q_ASSERT(newSize >= 0); if (d->needsDetach() || newSize > capacity() - d.freeSpaceAtBegin()) { - // must allocate memory - DataPointer detached(Data::allocate(d->detachCapacity(newSize), - d->detachFlags())); - if (size() && newSize) { - detached->copyAppend(constBegin(), constBegin() + qMin(newSize, size())); - } - d.swap(detached); - } - - if (newSize < size()) + d.detachAndGrow(QArrayData::GrowsAtEnd, newSize - d.size, nullptr, nullptr); + } else if (newSize < size()) { d->truncate(newSize); + } } template <typename T> @@ -506,23 +763,31 @@ void QList<T>::reserve(qsizetype asize) } } - DataPointer detached(Data::allocate(qMax(asize, size()), - d->detachFlags() | Data::CapacityReserved)); - detached->copyAppend(constBegin(), constEnd()); + DataPointer detached(qMax(asize, size())); + detached->copyAppend(d->begin(), d->end()); + if (detached.d_ptr()) + detached->setFlag(Data::CapacityReserved); d.swap(detached); } template <typename T> inline void QList<T>::squeeze() { - if (d->needsDetach() || size() != capacity()) { + if (!d.isMutable()) + return; + if (d->needsDetach() || size() < capacity()) { // must allocate memory - DataPointer detached(Data::allocate(size(), d->detachFlags() & ~Data::CapacityReserved)); + DataPointer detached(size()); if (size()) { - detached->copyAppend(constBegin(), constEnd()); + if (d.needsDetach()) + detached->copyAppend(d.data(), d.data() + d.size); + else + detached->moveAppend(d.data(), d.data() + d.size); } d.swap(detached); } + // We're detached so this is fine + d->clearFlag(Data::CapacityReserved); } template <typename T> @@ -534,33 +799,29 @@ inline void QList<T>::remove(qsizetype i, qsizetype n) if (n == 0) return; - const size_t newSize = size() - n; - if (d->needsDetach() || - ((d->flags() & Data::CapacityReserved) == 0 - && newSize < d->allocatedCapacity()/2)) { - // allocate memory - DataPointer detached(Data::allocate(d->detachCapacity(newSize), d->detachFlags())); - const_iterator where = constBegin() + i; - if (newSize) { - detached->copyAppend(constBegin(), where); - detached->copyAppend(where + n, constEnd()); - } - d.swap(detached); - } else { - // we're detached and we can just move data around - d->erase(d->begin() + i, d->begin() + i + n); - } + d.detach(); + d->erase(d->begin() + i, n); } template <typename T> -inline void QList<T>::prepend(const T &t) -{ insert(0, 1, t); } +inline void QList<T>::removeFirst() noexcept +{ + Q_ASSERT(!isEmpty()); + d.detach(); + d->eraseFirst(); +} + template <typename T> -void QList<T>::prepend(rvalue_ref t) -{ insert(0, std::move(t)); } +inline void QList<T>::removeLast() noexcept +{ + Q_ASSERT(!isEmpty()); + d.detach(); + d->eraseLast(); +} + template<typename T> -inline T QList<T>::value(qsizetype i, const T &defaultValue) const +inline T QList<T>::value(qsizetype i, parameter_type defaultValue) const { return size_t(i) < size_t(d->size) ? at(i) : defaultValue; } @@ -568,48 +829,30 @@ inline T QList<T>::value(qsizetype i, const T &defaultValue) const template <typename T> inline void QList<T>::append(const_iterator i1, const_iterator i2) { - if (i1 == i2) - return; - const size_t distance = std::distance(i1, i2); - const size_t newSize = size() + distance; - const bool shouldGrow = d->shouldGrowBeforeInsert(d.end(), qsizetype(distance)); - if (d->needsDetach() || newSize > d->allocatedCapacity() || shouldGrow) { - DataPointer detached(DataPointer::allocateGrow(d, newSize, - d->detachFlags() | Data::GrowsForward)); - detached->copyAppend(constBegin(), constEnd()); - detached->copyAppend(i1, i2); - d.swap(detached); - } else { - // we're detached and we can just move data around - d->copyAppend(i1, i2); - } + d->growAppend(i1.i, i2.i); } template <typename T> inline void QList<T>::append(QList<T> &&other) { + Q_ASSERT(&other != this); if (other.isEmpty()) return; if (other.d->needsDetach() || !std::is_nothrow_move_constructible_v<T>) return append(other); - const size_t newSize = size() + other.size(); - const bool shouldGrow = d->shouldGrowBeforeInsert(d.end(), other.size()); - if (d->needsDetach() || newSize > d->allocatedCapacity() || shouldGrow) { - DataPointer detached(DataPointer::allocateGrow(d, newSize, - d->detachFlags() | Data::GrowsForward)); - - if (!d->needsDetach()) - detached->moveAppend(begin(), end()); - else - detached->copyAppend(cbegin(), cend()); - detached->moveAppend(other.begin(), other.end()); + // due to precondition &other != this, we can unconditionally modify 'this' + d.detachAndGrow(QArrayData::GrowsAtEnd, other.size(), nullptr, nullptr); + Q_ASSERT(d.freeSpaceAtEnd() >= other.size()); + d->moveAppend(other.d->begin(), other.d->end()); +} - d.swap(detached); - } else { - // we're detached and we can just move data around - d->moveAppend(other.begin(), other.end()); - } +template<typename T> +template<typename... Args> +inline typename QList<T>::reference QList<T>::emplaceFront(Args &&... args) +{ + d->emplace(0, std::forward<Args>(args)...); + return *d.begin(); } @@ -618,33 +861,10 @@ inline typename QList<T>::iterator QList<T>::insert(qsizetype i, qsizetype n, parameter_type t) { Q_ASSERT_X(size_t(i) <= size_t(d->size), "QList<T>::insert", "index out of range"); - - // we don't have a quick exit for n == 0 - // it's not worth wasting CPU cycles for that - - const size_t newSize = size() + n; - const bool shouldGrow = d->shouldGrowBeforeInsert(d.begin() + i, n); - if (d->needsDetach() || newSize > d->allocatedCapacity() || shouldGrow) { - typename Data::ArrayOptions flags = d->detachFlags() | Data::GrowsForward; - if (d.size != 0 && i <= d.size / 4) - flags |= Data::GrowsBackwards; - - DataPointer detached(DataPointer::allocateGrow(d, newSize, flags)); - const_iterator where = constBegin() + i; - detached->copyAppend(constBegin(), where); - detached->copyAppend(n, t); - detached->copyAppend(where, constEnd()); - d.swap(detached); - } else { - // we're detached and we can just move data around - if (i == size()) { - d->copyAppend(n, t); - } else { - T copy(t); - d->insert(d.begin() + i, n, copy); - } - } - return d.begin() + i; + Q_ASSERT_X(n >= 0, "QList::insert", "invalid count"); + if (Q_LIKELY(n)) + d->insert(i, n, t); + return begin() + i; } template <typename T> @@ -652,31 +872,17 @@ template <typename ...Args> typename QList<T>::iterator QList<T>::emplace(qsizetype i, Args&&... args) { - Q_ASSERT_X(i >= 0 && i <= d->size, "QList<T>::insert", "index out of range"); - - const bool shouldGrow = d->shouldGrowBeforeInsert(d.begin() + i, 1); - const size_t newSize = size() + 1; - if (d->needsDetach() || newSize > d->allocatedCapacity() || shouldGrow) { - typename Data::ArrayOptions flags = d->detachFlags() | Data::GrowsForward; - if (d.size != 0 && i <= d.size / 4) - flags |= Data::GrowsBackwards; - - DataPointer detached(DataPointer::allocateGrow(d, newSize, flags)); - const_iterator where = constBegin() + i; - // Create an element here to handle cases when a user moves the element - // from a container to the same container. This is a critical step for - // COW types (e.g. Qt types) since copyAppend() done before emplace() - // would shallow-copy the passed element and ruin the move - T tmp(std::forward<Args>(args)...); - - detached->copyAppend(constBegin(), where); - detached->emplace(detached.end(), std::move(tmp)); - detached->copyAppend(where, constEnd()); - d.swap(detached); - } else { - d->emplace(d.begin() + i, std::forward<Args>(args)...); - } - return d.begin() + i; + Q_ASSERT_X(i >= 0 && i <= d->size, "QList<T>::insert", "index out of range"); + d->emplace(i, std::forward<Args>(args)...); + return begin() + i; +} + +template<typename T> +template<typename... Args> +inline typename QList<T>::reference QList<T>::emplaceBack(Args &&... args) +{ + d->emplace(d->size, std::forward<Args>(args)...); + return *(end() - 1); } template <typename T> @@ -686,11 +892,11 @@ typename QList<T>::iterator QList<T>::erase(const_iterator abegin, const_iterato Q_ASSERT_X(isValidIterator(aend), "QList::erase", "The specified iterator argument 'aend' is invalid"); Q_ASSERT(aend >= abegin); - qsizetype i = std::distance(d.constBegin(), abegin); + qsizetype i = std::distance(constBegin(), abegin); qsizetype n = std::distance(abegin, aend); remove(i, n); - return d.begin() + i; + return begin() + i; } template <typename T> @@ -700,16 +906,18 @@ inline QList<T> &QList<T>::fill(parameter_type t, qsizetype newSize) newSize = size(); if (d->needsDetach() || newSize > capacity()) { // must allocate memory - DataPointer detached(Data::allocate(d->detachCapacity(newSize), - d->detachFlags())); + DataPointer detached(d->detachCapacity(newSize)); detached->copyAppend(newSize, t); d.swap(detached); } else { // we're detached const T copy(t); d->assign(d.begin(), d.begin() + qMin(size(), newSize), t); - if (newSize > size()) + if (newSize > size()) { d->copyAppend(newSize - size(), copy); + } else if (newSize < size()) { + d->truncate(newSize); + } } return *this; } @@ -750,15 +958,17 @@ qsizetype lastIndexOf(const QList<T> &vector, const U &u, qsizetype from) noexce } template <typename T> -qsizetype QListSpecialMethods<T>::indexOf(const T &t, qsizetype from) const noexcept +template <typename AT> +qsizetype QListSpecialMethodsBase<T>::indexOf(const AT &t, qsizetype from) const noexcept { - return QtPrivate::indexOf(*static_cast<const QList<T> *>(this), t, from); + return QtPrivate::indexOf(*self(), t, from); } template <typename T> -qsizetype QListSpecialMethods<T>::lastIndexOf(const T &t, qsizetype from) const noexcept +template <typename AT> +qsizetype QListSpecialMethodsBase<T>::lastIndexOf(const AT &t, qsizetype from) const noexcept { - return QtPrivate::lastIndexOf(*static_cast<const QList<T> *>(this), t, from); + return QtPrivate::lastIndexOf(*self(), t, from); } template <typename T> @@ -778,8 +988,8 @@ inline QList<T> QList<T>::mid(qsizetype pos, qsizetype len) const } // Allocate memory - DataPointer copied(Data::allocate(l)); - copied->copyAppend(constBegin() + p, constBegin() + p + l); + DataPointer copied(l); + copied->copyAppend(data() + p, data() + p + l); return copied; } @@ -793,58 +1003,19 @@ size_t qHash(const QList<T> &key, size_t seed = 0) return qHashRange(key.cbegin(), key.cend(), seed); } -template <typename U> -QTypeTraits::compare_eq_result<U> operator==(const QList<U> &l, const QList<U> &r) -{ - if (l.size() != r.size()) - return false; - if (l.begin() == r.begin()) - return true; - - // do element-by-element comparison - return l.d->compare(l.begin(), r.begin(), l.size()); -} - -template <typename U> -QTypeTraits::compare_eq_result<U> operator!=(const QList<U> &l, const QList<U> &r) -{ - return !(l == r); -} - -template <typename T> -auto operator<(const QList<T> &lhs, const QList<T> &rhs) - noexcept(noexcept(std::lexicographical_compare(lhs.begin(), lhs.end(), - rhs.begin(), rhs.end()))) - -> decltype(std::declval<T>() < std::declval<T>()) -{ - return std::lexicographical_compare(lhs.begin(), lhs.end(), - rhs.begin(), rhs.end()); -} - -template <typename T> -auto operator>(const QList<T> &lhs, const QList<T> &rhs) - noexcept(noexcept(lhs < rhs)) - -> decltype(lhs < rhs) +template <typename T, typename AT> +qsizetype erase(QList<T> &list, const AT &t) { - return rhs < lhs; + return QtPrivate::sequential_erase(list, t); } -template <typename T> -auto operator<=(const QList<T> &lhs, const QList<T> &rhs) - noexcept(noexcept(lhs < rhs)) - -> decltype(lhs < rhs) -{ - return !(lhs > rhs); -} - -template <typename T> -auto operator>=(const QList<T> &lhs, const QList<T> &rhs) - noexcept(noexcept(lhs < rhs)) - -> decltype(lhs < rhs) +template <typename T, typename Predicate> +qsizetype erase_if(QList<T> &list, Predicate pred) { - return !(lhs < rhs); + return QtPrivate::sequential_erase_if(list, pred); } +// ### Qt 7 char32_t QList<uint> QStringView::toUcs4() const { return QtPrivate::convertToUcs4(*this); } QT_END_NAMESPACE |