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

feat(nix/yants): add restrict

Browse source 
`restrict` uses a predicate function to restrict a type, giving the
restricting a descriptive name in the process.

First, the wrapped type definition is checked (e.g. int) and then the
value is checked with the predicate, so the predicate can already
depend on the value being of the wrapped type.

Change-Id: Ic3edde45a8f34c31bc164414580d0a1aa5a821d5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2312
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>
Reviewed-by: tazjin <mail@tazj.in>
This commit is contained in:
Profpatsch 2021-01-01 21:36:42 +01:00
parent 2f063bc5b0
commit 4af195c5f2
2 changed files with 30 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

7
nix/yants/tests/default.nix
View file

@ -92,4 +92,11 @@ deepSeq rec {
(struct { a = int; b = option string; })
(sum { a = int; b = option string; })
];
testRestrict = [
((restrict "< 42" (i: i < 42) int) 25)
((restrict "not too long" (l: builtins.length l < 3) (list int)) [ 1 2 ])
(list (restrict "eq 5" (v: v == 5) any) [ 5 5 5 ])
];
} (pkgs.writeText "yants-tests" "All tests passed!")