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

feat(tvix/eval): Implement builtins.listToAttrs

Browse source 
Implement the listToAttrs builtin, which constructs an attribute set
from a list of attribute sets with keys name and value.

This is tested using an adaptation of the nix `eval-ok-listtoattrs.nix`,
with the utilities from `lib.nix` inlined.

Change-Id: Ib5bf743466dda9722c2c1e00797df4b58448cf0f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6894
Autosubmit: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
This commit is contained in:
Griffin Smith 2022-10-08 14:17:47 -04:00 • committed by grfn
parent d0f571dcc0
commit afdf1e0ed0
3 changed files with 33 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

1
tvix/eval/src/tests/tvix_tests/eval-okay-listtoattrs.exp Normal file
View file

@ -0,0 +1 @@
"AAbar"

15
tvix/eval/src/tests/tvix_tests/eval-okay-listtoattrs.nix Normal file
View file

@ -0,0 +1,15 @@
with builtins;
let
fold = op: nul: list:
if list == []
then nul
else op (head list) (fold op nul (tail list));
concat =
fold (x: y: x + y) "";
asi = name: value : { inherit name value; };
list = [ ( asi "a" "A" ) ( asi "b" "B" ) ];
a = builtins.listToAttrs list;
b = builtins.listToAttrs ( list ++ list );
r = builtins.listToAttrs [ (asi "result" [ a b ]) ( asi "throw" (throw "this should not be thrown")) ];
x = builtins.listToAttrs [ (asi "foo" "bar") (asi "foo" "bla") ];
in concat (map (x: x.a) r.result) + x.foo