Function db_upvaluejoin

extlibs/lua/src/ldblib.c:300–307

static int db_upvaluejoin (lua_State *L) {
  int n1 = checkupval(L, 1, 2);
  int n2 = checkupval(L, 3, 4);
  luaL_argcheck(L, !lua_iscfunction(L, 1), 1, "Lua function expected");
  luaL_argcheck(L, !lua_iscfunction(L, 3), 3, "Lua function expected");
  lua_upvaluejoin(L, 1, n1, 3, n2);
  return 0;
}


/*