History

sterni fcd5e53703 fix(tvix/eval/builtins): force acc not list element in foldl' When investigating discrepancies between foldl' in tvix and C++ Nix, I discovered that C++ Nix's foldl' doesn't seem to be strict at all. Since this seemed wrong, I looked into Haskell's foldl' implementation which doesn't force the list elements (`val` in our code), but the accumulation value (`res` in our code). You can look at the code here: https://hackage.haskell.org/package/base-4.17.0.0/docs/src/GHC.List.html#foldl%27 This actually makes a lot of sense: If `res` is not forced after each application of `op`, we'll end up thunks nested as deeply as the list is long, potentially taking up a lot of space. This can be limited by forcing the `res` thunk before applying `op` again (and creating a new thunk). I've also PR-ed an equivalent change for C++ Nix at https://github.com/NixOS/nix/pull/7158. Since this is not merged nor backported to our Nix 2.3 fork, I've not copied the eval fail test yet, since it wouldn't when checking our tests against C++ Nix in depot. Change-Id: I34edf6fc3031fc1485c3e714f2280b4fba8f004b Reviewed-on: https://cl.tvl.fyi/c/depot/+/6947 Autosubmit: sterni <sternenseemann@systemli.org> Reviewed-by: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI		2022-10-11 15:53:29 +00:00
..
.vscode	feat(tvix): set up cargo rust project	2022-01-06 15:38:52 +00:00
docs	docs(tvix): Update components.md	2022-09-16 11:55:57 +00:00
eval	fix(tvix/eval/builtins): force acc not list element in foldl'	2022-10-11 15:53:29 +00:00
nix_cli	chore(tvix/nix_cli): build with tests	2022-09-11 14:31:10 +00:00
proto	chore(3p/sources): Bump channels & overlays	2022-09-28 08:02:31 +00:00
.gitignore	feat(tvix): set up cargo rust project	2022-01-06 15:38:52 +00:00
LICENSE	chore(tvix): Bootstrap Tvix folder	2021-03-27 00:09:49 +00:00
OWNERS	chore(gerrit): migrate OWNERS files to code-owners style	2022-09-19 11:13:28 +00:00
README.md	chore(tvix): Bootstrap Tvix folder	2021-03-27 00:09:49 +00:00

README.md

Tvix

For more information about Tvix, contact one of the project owners. We are interested in people who would like to help us review designs, brainstorm and describe requirements that we may not yet have considered.

License structure

All code implemented for Tvix is licensed under the GPL-3.0, with the exception of the protocol buffer definitions used for communication between services which are available under a more permissive license (MIT).

The idea behind this structure is that any direct usage of our code (e.g. linking to it, embedding the evaluator, etc.) will fall under the terms of the GPL3, but users are free to implement their own components speaking these protocols under the terms of the MIT license.