local function _hx_obj_newindex(t,k,v)
    t.__fields__[k] = true
    rawset(t,k,v)
end

local _hx_obj_mt = {__newindex=_hx_obj_newindex, __tostring=_hx_tostring}

local function _hx_a(...)
  local __fields__ = {};
  local ret = {__fields__ = __fields__};
  local max = select('#',...);
  local tab = {...};
  local cur = 1;
  while cur < max do
    local v = tab[cur];
    __fields__[v] = true;
    ret[v] = tab[cur+1];
    cur = cur + 2
  end
  return setmetatable(ret, _hx_obj_mt)
end

local function _hx_e()
  return setmetatable({__fields__ = {}}, _hx_obj_mt)
end

local function _hx_o(obj)
  return setmetatable(obj, _hx_obj_mt)
end

function _hx_field_arr(obj)
    local res = {}
    local idx = 0
    if obj.__fields__ ~= nil then
        obj = obj.__fields__
    end
    for k,v in pairs(obj) do
        if _hx_hidden[k] == nil then
            res[idx] = k
            idx = idx + 1
        end
    end
    return _hx_tab_array(res, idx)
end
