1 files changed, 13 insertions, 0 deletions
diff --git a/krebs/4lib/tree.nix b/krebs/4lib/tree.nix
new file mode 100644
index 000000000..1cd83b3f6
--- /dev/null
+++ b/krebs/4lib/tree.nix
@@ -0,0 +1,13 @@
+{ lib, ... }:
+
+with lib;
+
+rec {
+  # tree k v = set k (either v (tree k v))
+
+  # get : [k] -> tree k v -> v
+  get = path: tree:
+    if length path > 0
+      then get (tail path) tree.${head path} # TODO check if elem exists
+      else tree;
+}