tvl-depot/third_party/nix/tests/lang/eval-okay-listtoattrs.nix
Vincent Ambo 7994fd1d54 Add 'third_party/nix/' from commit 'be66c7a6b24e3c3c6157fd37b86c7203d14acf10'
git-subtree-dir: third_party/nix
git-subtree-mainline: cf8cd640c1
git-subtree-split: be66c7a6b24e3c3c6157fd37b86c7203d14acf10
2020-05-17 15:52:38 +01:00

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512 B
Nix

# this test shows how to use listToAttrs and that evaluation is still lazy (throw isn't called)
with import ./lib.nix;
let
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