Method push_object_ref

library/LuaWrapper.cpp:168–184

* Push the pointer as DF object ref using metatable on the stack. */

 * Push the pointer as DF object ref using metatable on the stack.
 */
void LuaWrapper::push_object_ref(lua_State *state, void *ptr)
{
    // stack: [metatable]
    void* stg = lua_newuserdata(state, sizeof(DFRefHeader));
    new (stg) DFRefHeader
    {
        .ptr = ptr,
        .field_info = NULL,
        .tag_ptr = NULL,
        .tag_identity = NULL,
        .tag_attr = NULL,
    };

    lua_swap(state);
    lua_setmetatable(state, -2);
    // stack: [userdata]
}

DFRefHeader *LuaWrapper::get_object_ref_header(lua_State *state, int val_index)
{