breaking enum_name on magic_enum

CMakeLists.txt

cmake_minimum_required(VERSION 3.15)
project (mve LANGUAGES CXX)
set(CMAKE_CXX_STANDARD 17)

option(ENABLE_FIX "Enable MAGIC_ENUM_ENABLE_HASH" OFF)
if(ENABLE_FIX)
    add_compile_definitions(MAGIC_ENUM_ENABLE_HASH)
endif()

add_library(enum STATIC enum.cc)

add_executable(mve main.cc)
target_link_libraries(mve enum)

add_executable(mve_bad main_with_range.cc)
target_link_libraries(mve_bad enum)

enum.cc

#include "enum.h"
#include "magic_enum.hpp"

template <>
struct magic_enum::customize::enum_range<flag>
{
    static constexpr int min = static_cast<int>(flag::low);
    static constexpr int max = static_cast<int>(flag::high);

    static_assert(static_cast<uint64_t>(max) - static_cast<uint64_t>(min) < std::numeric_limits<uint16_t>::max(),
                  "magic_enum only supports names for the uint16_t range.");
};

std::string_view to_string(flag f){
    return magic_enum::enum_name(f);
}

enum.h

#ifndef EXAMPLE_ENUM_H
#define EXAMPLE_ENUM_H

#include <string_view>

enum class flag
{
    low = 0,
    high = 500,
};

std::string_view to_string(flag);

#endif // EXAMPLE_ENUM_H

main.cc

#include <iostream>

#include "enum.h"
#include "magic_enum.hpp"

int main() {
    std::cout << to_string(flag::low) << std::endl;
    std::cout << to_string(flag::high) << std::endl;
}

main_with_range.cc

#include <iostream>

#include "enum.h"
#include "magic_enum.hpp"

int main() {
    for (auto f : magic_enum::enum_values<flag>()) {
        std::cout << to_string(f) << std::endl;
    }
    std::cout << "---\n";

    std::cout << "low:  " << to_string(flag::low) << std::endl;
    std::cout << "high: " << to_string(flag::high) << std::endl;
}