Function lua_touserdata

third-party/lua-5.4.6/src/lapi.c:456–459

LUA_API void *lua_touserdata (lua_State *L, int idx) {
  const TValue *o = index2value(L, idx);
  return touserdata(o);
}


LUA_API lua_State *lua_tothread (lua_State *L, int idx) {