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Vincent Ambo 377ba19d75 feat(tvix/eval): ensure all errors always carry a span 
Previously error spans were optional because the information about
code spans was not available at runtime. Now that this information has
been added, the error type will always carry a span.

This change is very invasive all throughout the codebase. This is due
to the fact that many functions that are called *by* the VM expected
to return `EvalResult`, but this no longer works as the span
information is not available to those functions - only to the VM
itself.

To work around this the majority of these functions have been changed
to return `Result<T, ErrorKind>` instead and an accompanying macro in
the VM constructs the "real" error.

Note that this implementatino currently has a bug where errors
occuring within thunks will yield the location at which the thunk was
forced, not the location at which the error occured within the code.
This will be fixed soon, but the commit is large enough as is.

Change-Id: Ib1ecb81a4d09d464a95ea7ea9e589f3bd08d5202
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6408
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
2022-09-08 07:59:15 +00:00
..
.vscode feat(tvix): set up cargo rust project 2022-01-06 15:38:52 +00:00
docs style: format entire depot with nixpkgs-fmt 2022-01-31 16:11:53 +00:00
eval feat(tvix/eval): ensure all errors always carry a span 2022-09-08 07:59:15 +00:00
nix_cli chore(tvix/nix_cli): add default.nix 2022-08-30 11:03:48 +00:00
proto style: format entire depot with nixpkgs-fmt 2022-01-31 16:11:53 +00:00
.envrc feat(tvix): set up cargo rust project 2022-01-06 15:38:52 +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(tvix): Bootstrap Tvix folder 2021-03-27 00:09:49 +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.