From 01460745602c2c31f2ce6d7a22ff80602894679b Mon Sep 17 00:00:00 2001
From: symphorien <symphorien@users.noreply.github.com>
Date: Fri, 9 Feb 2018 18:40:39 +0000
Subject: nixos/tests: add predictable-interface-names.nix (#34305)

---
 lib/lists.nix | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'lib/lists.nix')

diff --git a/lib/lists.nix b/lib/lists.nix
index 8f67c6bb0ca3..f2e6bacdc98b 100644
--- a/lib/lists.nix
+++ b/lib/lists.nix
@@ -440,8 +440,12 @@ rec {
   init = list: assert list != []; take (length list - 1) list;
 
 
-  /* FIXME(zimbatm) Not used anywhere
-   */
+  /* return the image of the cross product of some lists by a function
+
+    Example:
+      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];
 
 
-- 
cgit v1.2.3