Function freeze_table

library/LuaWrapper.cpp:76–97

* Wrap a table so that it can't be modified. */

 * Wrap a table so that it can't be modified.
 */
static void freeze_table(lua_State *state, bool leave_metatable = false, const char *name = NULL)
{
    // rv = {}; setmetatable(rv, { __index = in, __newindex = change_error, __metatable = name })
    int base = lua_gettop(state);
    lua_newtable(state);
    lua_swap(state);
    lua_setfield(state, base, "__index");
    lua_getfield(state, LUA_REGISTRYINDEX, DFHACK_CHANGEERROR_NAME);
    lua_setfield(state, base, "__newindex");
    lua_newtable(state);
    lua_swap(state);
    lua_dup(state);
    lua_setmetatable(state, base);
    if (name)
    {
        lua_pushstring(state, name);
        lua_setfield(state, -2, "__metatable");
    }
    // result: [frozen table] [metatable]
    if (!leave_metatable)
        lua_pop(state, 1);
}

static void LookupInTable(lua_State *state, LuaToken *tname)
{