History

Vincent Ambo 1239a85e23 feat(tvix/eval): implement opcode for function calls in VM Nix functions always have a single argument and we do not yet make efforts to optimise this in Tvix for known multi-argument functions being directly applied. For this reason, the call instruction is fairly simple and just calls out to construct a new call frame. Note that the logic for terminating the run loop has moved to the top of the dispatch; this is because the loop run needs to be skipped if the call frame for the current lambda has just been dropped. Change-Id: I259bc07e19c1e55cd0a65207fa8105b23052b967 Reviewed-on: https://cl.tvl.fyi/c/depot/+/6249 Reviewed-by: sterni <sternenseemann@systemli.org> Reviewed-by: grfn <grfn@gws.fyi> Tested-by: BuildkiteCI		2022-09-02 12:31:04 +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	feat(tvix/eval): implement opcode for function calls in VM	2022-09-02 12:31:04 +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	chore(tvix/eval): bump rnix-parser to latest master	2022-09-01 17:41:22 +00:00
Cargo.toml	chore(tvix/eval): bump rnix-parser to latest master	2022-09-01 17:41:22 +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.