diff options
Diffstat (limited to 'pkgs/lib')
-rw-r--r-- | pkgs/lib/types.nix | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/pkgs/lib/types.nix b/pkgs/lib/types.nix index 8b0f61549b5d..01a5d98fca62 100644 --- a/pkgs/lib/types.nix +++ b/pkgs/lib/types.nix @@ -110,6 +110,12 @@ rec { throw "Multiple definitions. Only one is allowed for this option."; }; + none = elemType: mkOptionType { + inherit (elemType) name check iter fold docPath hasOptions; + merge = list: + throw "No definitions are allowed for this option."; + }; + nullOr = elemType: mkOptionType { inherit (elemType) name merge docPath hasOptions; check = x: builtins.isNull x || elemType.check x; |