meta-types.nix: Introduce enum type

2026-01-09 20:16:19 +01:00
parent 60ef776912
commit 27fcf5c8bc
1 changed files with 8 additions and 0 deletions
@@ -141,6 +141,14 @@ lib.fix (self: {
      verify = v: any (func: func v) funcs;
    };

+  enum =
+    values:
+    assert isList values && all isString values;
+    {
+      name = "enum<${concatStringsSep "," values}>";
+      verify = v: isString v && elem v values;
+    };
+
  record =
    fields:
    assert isAttrs fields && all isTypeDef (attrValues fields);