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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \class QPair
+    \brief The QPair class is a template class that stores a pair of items.
+
+    \ingroup tools
+    
+    QPair\<T1, T2\> can be used in your application if the STL \c
+    pair type is not available. It stores one value of type T1 and
+    one value of type T2. It can be used as a return value for a
+    function that needs to return two values, or as the value type of
+    a \l{generic container}.
+
+    Here's an example of a QPair that stores one QString and one \c
+    double value:
+
+    \snippet doc/src/snippets/code/doc_src_qpair.qdoc 0
+
+    The components are accessible as public data members called \l
+    first and \l second. For example:
+
+    \snippet doc/src/snippets/code/doc_src_qpair.qdoc 1
+
+    QPair's template data types (T1 and T2) must be \l{assignable
+    data types}. You cannot, for example, store a QWidget as a value;
+    instead, store a QWidget *. A few functions have additional
+    requirements; these requirements are documented on a per-function
+    basis.
+
+    \sa {Generic Containers}
+*/
+
+/*! \typedef QPair::first_type
+
+    The type of the first element in the pair (T1).
+
+    \sa first
+*/
+
+/*! \typedef QPair::second_type
+
+    The type of the second element in the pair (T2).
+
+    \sa second
+*/
+
+/*! \variable QPair::first
+
+    The first element in the pair.
+*/
+
+/*! \variable QPair::second
+
+    The second element in the pair.
+*/
+
+/*! \fn QPair::QPair()
+
+    Constructs an empty pair. The \c first and \c second elements are
+    initialized with \l{default-constructed values}.
+*/
+
+/*!
+    \fn QPair::QPair(const T1 &value1, const T2 &value2)
+
+    Constructs a pair and initializes the \c first element with \a
+    value1 and the \c second element with \a value2.
+
+    \sa qMakePair()
+*/
+
+/*!
+    \fn QPair<T1, T2> &QPair::operator=(const QPair<T1, T2> &other)
+
+    Assigns \a other to this pair.
+*/
+
+/*! \fn bool operator==(const QPair<T1, T2> &p1, const QPair<T1, T2> &p2)
+
+    \relates QPair
+
+    Returns true if \a p1 is equal to \a p2; otherwise returns false.
+    Two pairs compare equal if their \c first data members compare
+    equal and if their \c second data members compare equal.
+
+    This function requires the T1 and T2 types to have an
+    implementation of \c operator==().
+*/
+
+/*! \fn bool operator!=(const QPair<T1, T2> &p1, const QPair<T1, T2> &p2)
+
+    \relates QPair
+
+    Returns true if \a p1 is not equal to \a p2; otherwise returns
+    false. Two pairs compare as not equal if their \c first data
+    members are not equal or if their \c second data members are not
+    equal.
+
+    This function requires the T1 and T2 types to have an
+    implementation of \c operator==().
+*/
+
+/*! \fn bool operator<(const QPair<T1, T2> &p1, const QPair<T1, T2> &p2)
+
+    \relates QPair
+
+    Returns true if \a p1 is less than \a p2; otherwise returns
+    false. The comparison is done on the \c first members of \a p1
+    and \a p2; if they compare equal, the \c second members are
+    compared to break the tie.
+
+    This function requires the T1 and T2 types to have an
+    implementation of \c operator<().
+*/
+
+/*! \fn bool operator>(const QPair<T1, T2> &p1, const QPair<T1, T2> &p2)
+
+    \relates QPair
+
+    Returns true if \a p1 is greater than \a p2; otherwise returns
+    false. The comparison is done on the \c first members of \a p1
+    and \a p2; if they compare equal, the \c second members are
+    compared to break the tie.
+
+    This function requires the T1 and T2 types to have an
+    implementation of \c operator<().
+*/
+
+/*! \fn bool operator<=(const QPair<T1, T2> &p1, const QPair<T1, T2> &p2)
+
+    \relates QPair
+
+    Returns true if \a p1 is less than or equal to \a p2; otherwise
+    returns false. The comparison is done on the \c first members of
+    \a p1 and \a p2; if they compare equal, the \c second members are
+    compared to break the tie.
+
+    This function requires the T1 and T2 types to have an
+    implementation of \c operator<().
+*/
+
+/*! \fn bool operator>=(const QPair<T1, T2> &p1, const QPair<T1, T2> &p2)
+
+    \relates QPair
+
+    Returns true if \a p1 is greater than or equal to \a p2;
+    otherwise returns false. The comparison is done on the \c first
+    members of \a p1 and \a p2; if they compare equal, the \c second
+    members are compared to break the tie.
+
+    This function requires the T1 and T2 types to have an
+    implementation of \c operator<().
+*/
+
+/*!
+    \fn QPair<T1, T2> qMakePair(const T1 &value1, const T2 &value2)
+
+    \relates QPair
+
+    Returns a QPair\<T1, T2\> that contains \a value1 and \a value2.
+    Example:
+
+    \snippet doc/src/snippets/code/doc_src_qpair.qdoc 2
+
+    This is equivalent to QPair<T1, T2>(\a value1, \a value2), but
+    usually requires less typing.
+*/
+
+/*! \fn QDataStream &operator>>(QDataStream &in, QPair<T1, T2> &pair)
+
+    \relates QPair
+
+    Reads a pair from stream \a in into \a pair.
+
+    This function requires the T1 and T2 types to implement \c operator>>().
+
+    \sa {Format of the QDataStream operators}
+*/
+
+/*! \fn QDataStream &operator<<(QDataStream &out, const QPair<T1, T2> &pair)
+
+    \relates QPair
+
+    Writes the pair \a pair to stream \a out.
+
+    This function requires the T1 and T2 types to implement \c operator<<().
+
+    \sa {Format of the QDataStream operators}
+*/