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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of PySide2.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** 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-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "expression.h"
#include <sstream>
Expression::Expression() : m_value(0), m_operation(None), m_operand1(0), m_operand2(0)
{
}
Expression::Expression(int number) : m_value(number), m_operation(None), m_operand1(0), m_operand2(0)
{
}
Expression::Expression(const Expression& other)
{
m_operand1 = other.m_operand1 ? new Expression(*other.m_operand1) : 0;
m_operand2 = other.m_operand2 ? new Expression(*other.m_operand2) : 0;
m_value = other.m_value;
m_operation = other.m_operation;
}
Expression& Expression::operator=(const Expression& other)
{
delete m_operand1;
delete m_operand2;
m_operand1 = other.m_operand1 ? new Expression(*other.m_operand1) : 0;
m_operand2 = other.m_operand2 ? new Expression(*other.m_operand2) : 0;
m_operation = other.m_operation;
m_value = other.m_value;
return *this;
}
Expression::~Expression()
{
delete m_operand1;
delete m_operand2;
}
Expression Expression::operator+(const Expression& other)
{
Expression expr;
expr.m_operation = Add;
expr.m_operand1 = new Expression(*this);
expr.m_operand2 = new Expression(other);
return expr;
}
Expression Expression::operator-(const Expression& other)
{
Expression expr;
expr.m_operation = Add;
expr.m_operand1 = new Expression(*this);
expr.m_operand2 = new Expression(other);
return expr;
}
Expression Expression::operator<(const Expression& other)
{
Expression expr;
expr.m_operation = LessThan;
expr.m_operand1 = new Expression(*this);
expr.m_operand2 = new Expression(other);
return expr;
}
Expression Expression::operator>(const Expression& other)
{
Expression expr;
expr.m_operation = GreaterThan;
expr.m_operand1 = new Expression(*this);
expr.m_operand2 = new Expression(other);
return expr;
}
std::string Expression::toString() const
{
if (m_operation == None) {
std::ostringstream s;
s << m_value;
return s.str();
}
std::string result;
result += '(';
result += m_operand1->toString();
char op;
switch (m_operation) {
case Add:
op = '+';
break;
case Sub:
op = '-';
break;
case LessThan:
op = '<';
break;
case GreaterThan:
op = '<';
break;
case None: // just to avoid the compiler warning
default:
op = '?';
break;
}
result += op;
result += m_operand2->toString();
result += ')';
return result;
}
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