#ifndef CALCULATOR_CHALLENGE_OPERAND_HPP
#define CALCULATOR_CHALLENGE_OPERAND_HPP

#include <functional>
#include <string>
#include <variant>

template<typename T>
using BinaryOperatorType = std::function<T(T, T)>;
using Operator = BinaryOperatorType<double>;

class IntegerOperand
{
public:
    explicit IntegerOperand(double value) noexcept : _value{value} {}
    auto get() const noexcept -> double { return _value; };

private:
    double _value{0};
};

class VariableOperand
{
public:
    explicit VariableOperand(std::string name) noexcept : _name{std::move(name)} {}
    auto get() const noexcept -> std::string { return _name; };

private:
    std::string _name;
};

using Operand = std::variant<IntegerOperand, VariableOperand>;

#endif