Function luaL_callmeta

extlibs/lua/src/lauxlib.c:837–844

LUALIB_API int luaL_callmeta (lua_State *L, int obj, const char *event) {
  obj = lua_absindex(L, obj);
  if (luaL_getmetafield(L, obj, event) == LUA_TNIL)  /* no metafield? */
    return 0;
  lua_pushvalue(L, obj);
  lua_call(L, 1, 1);
  return 1;
}


LUALIB_API lua_Integer luaL_len (lua_State *L, int idx) {