nix-super/tests/lang/eval-okay-listtoattrs.nix

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# this test shows how to use listToAttrs and that evaluation is still lazy (throw isn't called)
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with import ./lib.nix;
let
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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")) ];
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in concat (map (x: x.a) r.result)