tools/qtconcurrent/codegenerator/example/main.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 04 Oct 2010 01:19:32 +0300
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the tools applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QDebug>
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#include "codegenerator.h"
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using namespace CodeGenerator;
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int main()
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{
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    // The code generator works on items. Each item has a generate() function:
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    Item item("");
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    qDebug() << item.generate(); // produces "".
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    // There are several Item subclasses. Text items contains a text string which they
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    // reproduce when generate is called:
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    Text text(" Hi there");
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    qDebug() << text.generate(); // produces " Hi there".
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    // Items can be concatenated:
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    Item sentence = text + Text(" Bye there") ;
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    qDebug() << sentence.generate(); // produces "Hi there Bye there".
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    // (Internally, this creates a tree of items, and generate is called recursively 
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    // for items that have children.)
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    // Repeater items repeat their content when generate is called:
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    Repeater repeater = text;
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    repeater.setRepeatCount(3);
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    qDebug() << repeater.generate(); // produces "Hi there Hi there Hi there".
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    // Counters evaluate to the current repeat index.
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    Repeater repeater2 = text + Counter();
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    repeater2.setRepeatCount(3);
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    qDebug() << repeater2.generate(); // produces "Hi there0 Hi there1 Hi there2".
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    // Groups provide sub-groups which are repeated according to the current repeat index.
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    // Counters inside Groups evaluate to the local repeat index for the Group.
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    Group arguments("Arg" + Counter()  + " arg" + Counter());
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    Repeater function("void foo(" + arguments + ");\n");
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    function.setRepeatCount(3);
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    qDebug() << function.generate();
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    // Produces:
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    // void foo(Arg1 arg1);
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    // void foo(Arg1 arg1, Arg2 arg2);
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    // void foo(Arg1 arg1, Arg2 arg2, Arg3 arg3);
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}