Function lua_isuserdata

third-part/lua-52/src/lapi.c:280–283

LUA_API int lua_isuserdata (lua_State *L, int idx) {
  const TValue *o = index2addr(L, idx);
  return (ttisuserdata(o) || ttislightuserdata(o));
}


LUA_API int lua_rawequal (lua_State *L, int index1, int index2) {