是否可以使用一个元组索引另一个元组?

I have two tuples: one with the data I want, and another with a list of indeces for the first tuple. I want to use the second tuple to access items from the first tuple using std::get, but it doesn't seem to work:

    const auto tup     = std::make_tuple(4, 5, 6);
    const auto indeces = std::make_tuple(0, 1, 2);

    const int index = std::get<0>(indeces);
    const int value = std::get<index>(tup); // won't compile
    // value should equal 4

Of course it's obvious why this fails if you consider that std::get won't return constexpr:

constexpr int index = std::get<0>(indeces); // won't compile

尽管如此,所有必要的信息都是在编译时提供的,所以我觉得应该有办法。在那儿?

Note: My indeces tuple starts out its life as a parameter pack of ints. I made it into a tuple because I hoped that it would be easier to work with, but this may not be the case. If anyone can see a way of bypassing the indeces tuple and using the parameter pack ints directly to index the first tuple, that would a welcome answer too.