From 27fcf5c8bc0eb5422992cb481d441720ff93c03c Mon Sep 17 00:00:00 2001
From: Silvan Mosberger <silvan.mosberger@moduscreate.com>
Date: Fri, 9 Jan 2026 20:16:19 +0100
Subject: [PATCH] meta-types.nix: Introduce enum type

---
 pkgs/stdenv/generic/meta-types.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkgs/stdenv/generic/meta-types.nix b/pkgs/stdenv/generic/meta-types.nix
index c43770cc2629..462aef57439e 100644
--- a/pkgs/stdenv/generic/meta-types.nix
+++ b/pkgs/stdenv/generic/meta-types.nix
@@ -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);