mdebray/tvl-depot
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

docs(tvix/eval): note C++ implementation details for C++ Nix

Browse source 
Just want to note those down somewhere before I forget them again,
we can delete them later if we have it all figured out.

Change-Id: Icafa2d8fc7ca39e38e9637b7eca6f2bbf487c2b8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6632
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
This commit is contained in:
sterni 2022-09-18 15:46:30 +02:00 committed by clbot
parent 3410b8979e
commit a798efc77b
1 changed files with 8 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
tvix/eval/docs/recursive-attrs.md
View file

@ -58,3 +58,11 @@ bindings.
In practice, we can further specialise this and compile each scope In practice, we can further specialise this and compile each scope
directly into the form expected by `OpAttrs` (that is, leaving directly into the form expected by `OpAttrs` (that is, leaving
attribute names on the stack) before each value's position. attribute names on the stack) before each value's position.
C++ Nix's Implementation
------------------------
* [`ExprAttrs`](https://github.com/NixOS/nix/blob/2097c30b08af19a9b42705fbc07463bea60dfb5b/src/libexpr/nixexpr.hh#L241-L268)
(AST representation of attribute sets)
* [`ExprAttrs::eval`](https://github.com/NixOS/nix/blob/075bf6e5565aff9fba0ea02f3333c82adf4dccee/src/libexpr/eval.cc#L1333-L1414)
* [`addAttr`](https://github.com/NixOS/nix/blob/master/src/libexpr/parser.y#L98-L156) (`ExprAttrs` construction in the parser)