libflow VS aoc2021

Have you seen libflow? It's also built on the same model (Rust-style iterators), curious how they compare.

Just to get on the bandwagon: here are my C++20 Advent of Code solutions, mostly using my work-in-progress Flow library

Perhaps relevant since Barry mentioned my Flow library as an example: the following (written a couple of years ago for another Reddit thread) is what would appear in Flow's documentation as a justification for using optional references -- if Flow actually had any documentation, that is...

If you want to use the Rust iterator model in C++, then you can do so.

I have a work-in-progress-for-a-long-time-now functional-style programming library called libflow, which uses Swift/Rust style iterators. It has optional support for coroutines ("flowroutines", heh) which can make writing "one-shot" iterators very simple indeed.

Github repo: https://github.com/foolnotion/aoc2021

I implemented A*. Runs in 16ms (both parts). code on github

I feel like today's problem challenged my reading comprehension. code on github

code on github

github solution

As always parsing the input takes most of the space. I did not bother writing my own loops to fill the diagonals and I used Eigen instead - github

C++ solution using Eigen: github