about summary refs log tree commit diff
path: root/users/sterni/nix/fun/default.nix
diff options
context:
space:
mode:
Diffstat (limited to 'users/sterni/nix/fun/default.nix')
-rw-r--r--users/sterni/nix/fun/default.nix45
1 files changed, 45 insertions, 0 deletions
diff --git a/users/sterni/nix/fun/default.nix b/users/sterni/nix/fun/default.nix
new file mode 100644
index 000000000000..a7d173eb94a4
--- /dev/null
+++ b/users/sterni/nix/fun/default.nix
@@ -0,0 +1,45 @@
+{ depot, lib, ... }:
+
+let
+
+  inherit (lib)
+    id
+    ;
+
+  # Simple function composition,
+  # application is right to left.
+  rl = f1: f2:
+    (x: f1 (f2 x));
+
+  # Compose a list of functions,
+  # application is right to left.
+  rls = fs:
+    builtins.foldl' (fOut: f: lr f fOut) id fs;
+
+  # Simple function composition,
+  # application is left to right.
+  lr = f1: f2:
+    (x: f2 (f1 x));
+
+  # Compose a list of functions,
+  # application is left to right
+  lrs = fs: x:
+    builtins.foldl' (v: f: f v) x fs;
+
+in
+
+{
+  inherit (lib)
+    fix
+    flip
+    const
+    ;
+
+  inherit
+    id
+    rl
+    rls
+    lr
+    lrs
+    ;
+}