diff options
Diffstat (limited to 'nixpkgs/lib/lists.nix')
| -rw-r--r-- | nixpkgs/lib/lists.nix | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/nixpkgs/lib/lists.nix b/nixpkgs/lib/lists.nix index 06cee2eb112a..e469f3ef2652 100644 --- a/nixpkgs/lib/lists.nix +++ b/nixpkgs/lib/lists.nix @@ -241,7 +241,7 @@ rec { /* Return a singleton list or an empty list, depending on a boolean value. Useful when building lists with optional elements - (e.g. `++ optional (system == "i686-linux") flashplayer'). + (e.g. `++ optional (system == "i686-linux") firefox'). Type: optional :: bool -> a -> [a] @@ -629,7 +629,9 @@ rec { crossLists (x:y: "${toString x}${toString y}") [[1 2] [3 4]] => [ "13" "14" "23" "24" ] */ - crossLists = f: foldl (fs: args: concatMap (f: map f args) fs) [f]; + crossLists = builtins.trace + "lib.crossLists is deprecated, use lib.cartesianProductOfSets instead" + (f: foldl (fs: args: concatMap (f: map f args) fs) [f]); /* Remove duplicate elements from the list. O(n^2) complexity. |