lix/tests/functional/lang/eval-okay-attrs2.nix

let
  as = { x = 123; y = 456; } // { z = 789; } // { z = 987; };

  A = "a";
  Z = "z";

in
if builtins.hasAttr A as then
  builtins.getAttr A as
else
  assert builtins.hasAttr Z as; builtins.getAttr Z as
treewide: Stop using ancient let syntax Shows for how long these tests have not been touched by anyone … Change-Id: I3d0c1209a86283ddb012db4e7d45073264fdd0eb 2024-08-18 15:28:04 +00:00			`let`
* New builtin functions builtins.{hasAttr, getAttr} to check for attribute existence and to return an attribute from an attribute set, respectively. Example: `hasAttr "foo" {foo = 1;}'. They differ from the `?' and `.' operators in that the attribute name is an arbitrary expression. (NIX-61) 2006-09-22 14:31:55 +00:00			`as = { x = 123; y = 456; } // { z = 789; } // { z = 987; };`

			`A = "a";`
			`Z = "z";`

treewide: Stop using ancient let syntax Shows for how long these tests have not been touched by anyone … Change-Id: I3d0c1209a86283ddb012db4e7d45073264fdd0eb 2024-08-18 15:28:04 +00:00			`in`
			`if builtins.hasAttr A as then`
			`builtins.getAttr A as`
			`else`
			`assert builtins.hasAttr Z as; builtins.getAttr Z as`