From f932910323bf7188f70c49789ce85392c36e06b4 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Tue, 19 Aug 2014 13:13:51 +0200
Subject: [PATCH] =?UTF-8?q?types.nix:=20Add=20=E2=80=98either=E2=80=99=20t?=
 =?UTF-8?q?ype?=
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---
 lib/types.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/types.nix b/lib/types.nix
index f5700ab0269..0e2b6515e16 100644
--- a/lib/types.nix
+++ b/lib/types.nix
@@ -200,6 +200,12 @@ rec {
       merge = mergeOneOption;
     };
 
+    either = t1: t2: mkOptionType {
+      name = "${t1.name} or ${t2.name}";
+      check = x: t1.check x || t2.check x;
+      merge = mergeOneOption;
+    };
+
     # Obsolete alternative to configOf.  It takes its option
     # declarations from the ‘options’ attribute of containing option
     # declaration.