enum.h

/*
 * Copyright (C) 2018 Microchip Technology Inc.  All rights reserved.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#ifndef EGT_DETAIL_ENUM_H
#define EGT_DETAIL_ENUM_H
 
#include <cstring>
#include <stdexcept>
#include <string>
#include <utility>
 
namespace egt
{
inline namespace v1
{
namespace detail
{
 
template<class T>
struct EnumStrings
{
    static const std::pair<T, char const*> data[];
};
 
template<class T>
constexpr const char* enum_to_string(T const& e)
{
    for (const auto& i : EnumStrings<T>::data)
        if (i.first == e)
            return i.second;
 
    throw std::runtime_error("invalid enum");
}
 
template<class T>
constexpr T enum_from_string(const char* value)
{
    for (const auto& i : EnumStrings<T>::data)
        if (std::strcmp(i.second, value) == 0)
            return i.first;
 
    throw std::runtime_error("invalid enum string");
}
 
template<class T>
constexpr T enum_from_string(const std::string& value)
{
    for (const auto& i : EnumStrings<T>::data)
        if (i.second == value)
            return i.first;
 
    throw std::runtime_error("invalid enum string");
}
 
}
}
}
 
#endif