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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "expression.h"
#include <sstream>
Expression::Expression() noexcept = default;
Expression::Expression(int number) noexcept : m_value(number)
{
}
Expression Expression::operator+(const Expression &other)
{
Expression expr;
expr.m_operation = Add;
expr.m_operand1 = std::make_shared<Expression>(*this);
expr.m_operand2 = std::make_shared<Expression>(other);
return expr;
}
Expression Expression::operator-(const Expression &other)
{
Expression expr;
expr.m_operation = Add;
expr.m_operand1 = std::make_shared<Expression>(*this);
expr.m_operand2 = std::make_shared<Expression>(other);
return expr;
}
Expression Expression::operator<(const Expression &other)
{
Expression expr;
expr.m_operation = LessThan;
expr.m_operand1 = std::make_shared<Expression>(*this);
expr.m_operand2 = std::make_shared<Expression>(other);
return expr;
}
Expression Expression::operator>(const Expression &other)
{
Expression expr;
expr.m_operation = GreaterThan;
expr.m_operand1 = std::make_shared<Expression>(*this);
expr.m_operand2 = std::make_shared<Expression>(other);
return expr;
}
std::string Expression::toString() const
{
std::ostringstream s;
if (m_operation == None) {
s << m_value;
return s.str();
}
s << '(' << m_operand1->toString();
switch (m_operation) {
case Add:
s << '+';
break;
case Sub:
s << '-';
break;
case LessThan:
s << '<';
break;
case GreaterThan:
s << '<';
break;
default:
s << '?';
break;
}
s << m_operand2->toString() << ')';
return s.str();
}
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