It is not relevant, but mentioned it to just say that their existing
structure is normally just a dumb recursion which is perfect for compile
indexing, but not for complex optimizations that are to reduce a runtime
indexing operator to 0(1) complexity.

I am sorry that I didn't reply to all the previous responses, I was a
little tired from writing the code.

On Mon, 20 Apr 2026, 1:41 pm Sebastian Wittmeier via Std-Proposals, <
std-proposals_at_[hidden]> wrote:

> Is it relevant, whether tuples are recursively defined, or not?
>
> It is the programming style for functional programming.
>
> Doesn't mean that indexes are resolved recursively at runtime.
>
>
> -----Ursprüngliche Nachricht-----
> *Von:* Muneem via Std-Proposals <std-proposals_at_[hidden]>
> *Gesendet:* Mo 20.04.2026 10:03
> *Betreff:* Re: [std-proposals] Extension to std::tuples to allow runtime
> indexing.
> *An:* std-proposals_at_[hidden];
> *CC:* Muneem <itfllow123_at_[hidden]>;
> Sorry for sending too many emails at one( I really am ):
>
> https://github.com/HjaldrKhilji/Future-potential-ISO-porposals/blob/main/Runtime_Indexed_Tuples_Proposal_Official%20(1).pdf
>
> (in case you couldnt see my proposal as attached then this is the link)
>
> On Mon, Apr 20, 2026 at 1:00 PM Muneem <itfllow123_at_[hidden]> wrote:
>
> My proposal with conceptual implementation that you can run but the
> implementation does not have the exact implementation as one with
> std::variant<T&...> would have, like I could modify it but it would never
> be one to one, so see my implementation as a conceptual implementation
> roadmap meant to show how bookkeeping helps rather than showing the exact
> semantics of my implementation.
>
> I also fixed some Typos and grammar mistakes (in the code example section)
> that were in my updated docx file.
>
> On Mon, Apr 20, 2026 at 12:47 PM Muneem <itfllow123_at_[hidden]> wrote:
>
> Credits to this video:
> https://www.youtube.com/watch?v=LDPMpc-ENqY
> like in this video, at the end, he describes std::apply that was useful
> for folding tuples for me. I was lucky to see this a month ago while
> learning random number generators and reading Bjarne's great book. Without
> this video, My code couldn't be completed, like most of it is basic, except
> the part where I used std::apply because that was what took 3 hours to get
> a hint of, which is when this video came into mind somehow. Funny how the
> world is, like I programmed in my dream, literally solving this puzzle.
> This puzzle may look basic to the old timers but for me, this basic puzzle
> took like an honest 4 hours to prototype and 6 hours to fix
> completely(about 10 if you count the 2-4 hours in my dream).
>
> On Mon, Apr 20, 2026 at 12:25 PM Muneem <itfllow123_at_[hidden]> wrote:
>
> My code is complete:
>
> https://github.com/HjaldrKhilji/Future-potential-ISO-porposals/blob/main/Code_example.cpp
> https://godbolt.org/z/WWoWrd3q1
> My updated proposal is also attached and is also on the github link:
>
> https://github.com/HjaldrKhilji/Future-potential-ISO-porposals/blob/main/Runtime_Indexed_Tuples_Proposal_Official%20(1).docx
>
> Again, I am sorry for taking so much time on such trivial code. I know I
> should be faster, so hope it dosent reflect badly on the technical merit of
> my proposal
>
> On Sun, Apr 19, 2026 at 11:22 PM Muneem <itfllow123_at_[hidden]> wrote:
>
> https://godbolt.org/z/rs34q1Wj9
> This is what I got till today, I will debug this tomorrow, but yeah, I
> just wanted to show what's done till now before going to sleep.
>
> On Sun, Apr 19, 2026 at 8:54 PM Muneem <itfllow123_at_[hidden]> wrote:
>
> I am really really sorry that previously my code was not only using enable
> if but also the pattern of making types unique was wrong. I promise that I
> will fix it tomorrow and will test every possible specialization to make
> sure such mistakes don't occur again. Again, really really sorry. I am
> almost done with the proper code but it's just a little bit left that I
> left for tomorrow. I know it's nothing special and that I should be better
> at wiring such basic code but things happen and in my case, it would to not
> think properly so as to use recursion with conditinal_t.
>
> Regards, Muneem
>
> On Sun, 19 Apr 2026, 8:28 pm Thiago Macieira via Std-Proposals, <
> std-proposals_at_[hidden]> wrote:
>
> On Sunday, 19 April 2026 01:01:13 Pacific Daylight Time Muneem via Std-
> Proposals wrote:
> > This is the example implementation code:
>
> Send the link to the working implementation in godbolt or your repository
> on
> GitHub/GitLab/equivalent.
>
> --
> Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
> Principal Engineer - Intel Data Center - Platform & Sys. Eng.
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