Natural.h

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/* Copyright 2019 Kristofer Björnson
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef COM_DAFER45_TBTK_NATURAL
#define COM_DAFER45_TBTK_NATURAL

#include "TBTK/PseudoSerializable.h"

#ifndef TBTK_DISABLE_NLOHMANN_JSON
#   include "TBTK/json.hpp"
#endif

namespace TBTK{

#if TBTK_WRAP_PRIMITIVE_TYPES

class Natural : PseudoSerializable{
public:
    Natural(){};

    constexpr Natural(unsigned int value) : value(value) {}

    Natural(const std::string &serialization, Serializable::Mode mode);

    constexpr operator unsigned int() const{    return value;   };

    Natural& operator=(unsigned int rhs){
        value = rhs;

        return *this;
    }

    Natural& operator+=(const Natural &rhs){
        value += rhs.value;

        return *this;
    }

    Natural& operator-=(const Natural &rhs){
        value -= rhs.value;

        return *this;
    }

    Natural& operator*=(const Natural &rhs){
        value *= rhs.value;

        return *this;
    }

    Natural& operator/=(const Natural &rhs){
        value /= rhs.value;

        return *this;
    }

    Natural& operator++(){
        value++;

        return *this;
    }

    Natural operator++(int){
        Natural previous(*this);
        operator++();

        return previous;
    }

    Natural& operator--(){
        value--;

        return *this;
    }

    Natural operator--(int){
        Natural previous(*this);
        operator--();

        return previous;
    }

    std::string serialize(Serializable::Mode mode) const;

#ifndef TBTK_DISABLE_NLOHMANN_JSON

    friend void to_json(nlohmann::json &j, const Natural &natural){
        nlohmann::to_json(j, natural.value);
    }

    friend void from_json(const nlohmann::json &j, Natural &natural){
        nlohmann::from_json(j, natural.value);
    }
#endif
private:
    unsigned int value;
};

inline Natural::Natural(
    const std::string &serialization,
    Serializable::Mode mode
){
    switch(mode){
    case Serializable::Mode::JSON:
        value = stoul(serialization);
        break;
    default:
        TBTKExit(
            "Natural::Natural()",
            "Only Serializable::Mode::JSON is supported yet.",
            ""
        );
    }
}

inline std::string Natural::serialize(Serializable::Mode mode) const{
    switch(mode){
    case Serializable::Mode::JSON:
        return std::to_string(value);
    default:
        TBTKExit(
            "Natural::serialize()",
            "Only Serializable::Mode::JSON is supported yet.",
            ""
        );
    }
}

#else
    typedef unsigned int Natural;
#endif

};  //End of namespace TBTK

#endif