Charge.h

#pragma once
 
#include <compare>
#include <ostream>
#include <string>
 
namespace xrpl::resource {

class Charge
{
public:
    using value_type = int;
 
    // A default constructed Charge has no way to get a label.  Delete
    Charge() = delete;

    Charge(value_type cost, std::string label = std::string());

    [[nodiscard]] std::string const&
    label() const;

    [[nodiscard]] value_type
    cost() const;

    [[nodiscard]] std::string
    toString() const;
 
    bool
    operator==(Charge const&) const;
 
    std::strong_ordering
    operator<=>(Charge const&) const;
 
    Charge
    operator*(value_type m) const;
 
private:
    value_type cost_;
    std::string label_;
};
 
std::ostream&
operator<<(std::ostream& os, Charge const& v);
 
}  // namespace xrpl::resource