Function is_luabind_function

Source/Misc/luabind/src/function.cpp:47–54

} // namespace unnamed

LUABIND_API bool is_luabind_function(lua_State* L, int index)
{
    if (!lua_getupvalue(L, index, 2))
        return false;
    bool result = lua_touserdata(L, -1) == &function_tag;
    lua_pop(L, 1);
    return result;
}

namespace
{