1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtCore module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#ifndef QSTACK_H
41#define QSTACK_H
42
43#include <QtCore/qvector.h>
44
45QT_BEGIN_NAMESPACE
46
47
48template<class T>
49class QStack : public QVector<T>
50{
51public:
52 // compiler-generated special member functions are fine!
53 inline void swap(QStack<T> &other) noexcept { QVector<T>::swap(other); } // prevent QVector<->QStack swaps
54 inline void push(const T &t) { QVector<T>::append(t); }
55 T pop();
56 T &top();
57 const T &top() const;
58};
59
60template<class T>
61inline T QStack<T>::pop()
62{ Q_ASSERT(!this->isEmpty()); T t = this->data()[this->size() -1];
63 this->resize(this->size()-1); return t; }
64
65template<class T>
66inline T &QStack<T>::top()
67{ Q_ASSERT(!this->isEmpty()); this->detach(); return this->data()[this->size()-1]; }
68
69template<class T>
70inline const T &QStack<T>::top() const
71{ Q_ASSERT(!this->isEmpty()); return this->data()[this->size()-1]; }
72
73QT_END_NAMESPACE
74
75#endif // QSTACK_H
76