Method Add

library/cpp/expression/expression_variable.cpp:288–290

    return static_cast<size_t>(ToDouble()) & static_cast<size_t>(secondOperand.ToDouble());
}
double TExpressionVariable::Add(const TExpressionVariable& secondOperand) const {
    return ToDouble() + secondOperand.ToDouble();
}
double TExpressionVariable::Sub(const TExpressionVariable& secondOperand) const {
    return ToDouble() - secondOperand.ToDouble();
}