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Diffstat (limited to '4lib/krebs/default.nix')
-rw-r--r-- | 4lib/krebs/default.nix | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/4lib/krebs/default.nix b/4lib/krebs/default.nix index 0c59076..0c42a5d 100644 --- a/4lib/krebs/default.nix +++ b/4lib/krebs/default.nix @@ -12,4 +12,22 @@ builtins // lib // rec { types = import ./types.nix { inherit lib; }; + + # listset k v = set k [v] + + # listset-insert : k -> v -> listset k v -> listset k v + listset-insert = name: value: set: + set // { ${name} = set.${name} or [] ++ [value]; }; + + # tree k v = set k (either v (tree k v)) + + # tree-get : [k] -> tree k v -> v + tree-get = path: x: + let + y = x.${last path}; + in + if typeOf y != "set" + then y + else tree-get (init path) y; + } |