add not fn

2026-01-28 13:51:51 +10:00 · 2026-01-28 13:51:51 +10:00 · 2cabb50a38
commit 2cabb50a38
parent 20fec532be
1 changed files with 12 additions and 1 deletions
--- a/nt/primitives/std/prim/fn.nix
+++ b/nt/primitives/std/prim/fn.nix
@ -1,4 +1,9 @@
-{...}: {
+{...}: let
+  inherit
+    (builtins)
+    isFunction
+    ;
+in rec {
  id = x: x;

  # syntactic sugar for curry flipping
@ -15,4 +20,10 @@
    if x != null
    then f x
    else x;
+
+  not = f:
+    if isFunction f
+    then x: not (f x)
+    # WARNING: assume isBool holds (or fail)
+    else ! f;
 }