From d33f7d10f4ee6bb41a73e1a2981de5d602f64952 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Tue, 20 Jan 2015 17:50:45 +0100
Subject: Added higher order list query `None`

---
 src/operation/logic.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/operation')

diff --git a/src/operation/logic.h b/src/operation/logic.h
index 23393b2..3e447d6 100644
--- a/src/operation/logic.h
+++ b/src/operation/logic.h
@@ -23,6 +23,9 @@ template <
 >
 using Xor = Boolean<X::value ^ Y::value>;
 
+template <typename X>
+using Not = Boolean<!X::value>;
+
 }
 
 #endif // TYPEASVALUE_SRC_OPERATION_LOGIC_H_
-- 
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