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

assert builtins ? currentSystem;
assert !builtins ? __currentSystem;

let

  x = if builtins ? dirOf then builtins.dirOf /foo/bar else "";

  y = if builtins ? fnord then builtins.fnord "foo" else "";

in
x + y
* A new primop `builtins', which returns an attribute set containing all the primops. This allows Nix expressions to test for new primops and take appropriate action if they're not available. For instance, rather than calling a primop `foo' directly, they could say `if builtins ? foo then builtins.foo ... else ...'. 2006-08-23 14:39:11 +00:00			`assert builtins ? currentSystem;`
			`assert !builtins ? __currentSystem;`

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`
* A new primop `builtins', which returns an attribute set containing all the primops. This allows Nix expressions to test for new primops and take appropriate action if they're not available. For instance, rather than calling a primop `foo' directly, they could say `if builtins ? foo then builtins.foo ... else ...'. 2006-08-23 14:39:11 +00:00
			`x = if builtins ? dirOf then builtins.dirOf /foo/bar else "";`

			`y = if builtins ? fnord then builtins.fnord "foo" else "";`

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`
			`x + y`