Using enum in function argument

[eduardodoria]

I have this enum:

    enum class Scaling{
        FITWIDTH,
        FITHEIGHT,
        LETTERBOX,
        CROP,
        STRETCH
    };

And these C++ functions:

static void setScalingMode(Scaling scalingMode);
static Scaling getScalingMode();

Lua bindings:

    luabridge::getGlobalNamespace(L)
        .beginNamespace("Scaling")
        .addProperty("FITWIDTH", Scaling::FITWIDTH)
        .addProperty("FITHEIGHT", Scaling::FITHEIGHT)
        .addProperty("LETTERBOX", Scaling::LETTERBOX)
        .addProperty("CROP", Scaling::CROP)
        .addProperty("STRETCH", Scaling::STRETCH)
        .endNamespace();

    luabridge::getGlobalNamespace(L)
        .beginClass<Engine>("Engine")
        .addStaticFunction("setScalingMode", &Engine::setScalingMode)
        .addStaticProperty("scalingMode", &Engine::getScalingMode, &Engine::setScalingMode)
        .endClass();

Code in Lua:

Engine.setScalingMode(Scaling.CROP)   -- not working
Engine.scalingMode = Scaling.CROP  -- not working

None of them are working. Is there anyway to get these enum working in function argument?

[eduardodoria]

Answering my own question. I did this just by specializing luabridge::Stack.

template <class T>
struct EnumWrapper
{
    static auto push(lua_State* L, T value, std::error_code& ec) -> std::enable_if_t<std::is_enum_v<T>, bool>
    {
        lua_pushnumber(L, static_cast<std::size_t>(value));
        return true;
    }

    static auto get(lua_State* L, int index) -> std::enable_if_t<std::is_enum_v<T>, T>
    {
        return static_cast<T>(lua_tointeger(L, index));
    }
};

namespace luabridge
{
    template<> struct Stack<Supernova::Scaling> : EnumWrapper<Supernova::Scaling>{};
}

And works!