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Vincent Ambo 0b51d63081 refactor(tvix/eval): simplify let ... in ... before recursion 
While full recursion through thunking is not available, there are
actually incorrect behaviours introduced by declaring before
binding (example in the newly introduced test).

This commit simplifies the implementation to avoid this issue, and
also because I intend to explore a bit more how far we can get in non
left-to-right bindings *without* introducing thunks immediately.

Change-Id: I21fd3007ac3946570639772d7d624d70bd209958
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6226
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: grfn <grfn@gws.fyi>
2022-08-31 22:42:48 +00:00
..
benches feat(tvix/eval): Add initial benchmarking infrastructure 2022-08-25 16:03:55 +00:00
docs docs(tvix/eval): add design documentation for attrset opcodes 2022-08-13 15:31:50 +00:00
src refactor(tvix/eval): simplify let ... in ... before recursion 2022-08-31 22:42:48 +00:00
.gitignore feat(tvix/eval): check in generated project skeleton 2022-08-12 12:34:29 +00:00
.skip-subtree feat(tvix/tests): check in Nix' language test suite 2022-08-24 21:25:41 +00:00
Cargo.lock feat(tvix/eval): implement optional runtime tracing 2022-08-30 16:53:40 +00:00
Cargo.toml feat(tvix/eval): implement optional runtime tracing 2022-08-30 16:53:40 +00:00
default.nix test(tvix/eval): make sure all language tests also pass with C++ Nix 2022-08-26 20:46:03 +00:00
README.md docs(tvix/eval): add README note on running the Nix test suite 2022-08-24 23:11:12 +00:00

README.md

Tvix Evaluator

This project implements an interpreter for the Nix programming language.

The interpreter aims to be compatible with nixpkgs, on the foundation of Nix 2.3.

Work on this project is extremely in-progress, and the state of the project in the public repository may not necessarily reflect the state of the private codebase, as we are slowly working on publishing it.

We expect this to have caught up in a handful of weeks (as of 2022-08-12).

Please contact TVL with any questions you might have.

Nix test suite

C++ Nix implements a language test suite in the form of Nix source code files, and their expected output. The coverage of this test suite is not complete, but we intend to be compatible with it.

We have ported the test suite to Tvix, but do not run it by default as we are not yet compatible with it.

You can run the test suite by enabling the nix_tests feature in Cargo.

rnix-parser

Tvix is written in memory of jD91mZM2, the author of rnix-parser who sadly passed away.

Tvix makes heavy use of rnix-parser in its bytecode compiler. The parser is now maintained by Nix community members.