Complete solutions to Advent of Code problems in Haskell.
All years are fully completed. I aimed for idiomatic and relatively clean solutions before 2022 then moved to a custom prelude and prioritised fun
The modules Coord and Grid contain various tools for working with 2D and 3D grids, and Utils contains a grab-bag of generally AOC-friendly tooling. Tracers has a bunch of useful printf-debugging utilities augmenting Debug.Trace.
2015 through 2020 are contained in one huge Stack project; this has become impossible to upgrade, and is pegged to GHC 8.6.5, which doesn’t work well with new versions of OS X. This is now archived; it should still be runnable with 8.6.5 (and stack --nix should work as long as 8.6.5’s tarball remains), but I expect this will bit-rot over time.
Going forwards from 2021, each year is its own Nix-managed Cabal project.