From 731c27c0942fb4d7d620627e50f24bb261b9a3d8 Mon Sep 17 00:00:00 2001
From: Maxime Coste <frrrwww@gmail.com>
Date: Mon, 13 Apr 2015 15:20:47 +0100
Subject: [PATCH] Add a 'abs' friend function to StronglyTypedNumber

---
 src/units.hh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/units.hh b/src/units.hh
index 945f7265..f37dc960 100644
--- a/src/units.hh
+++ b/src/units.hh
@@ -113,6 +113,7 @@ public:
     explicit constexpr operator bool() const { return m_value; }
 
     friend size_t hash_value(RealType val) { return hash_value(val.m_value); }
+    friend size_t abs(RealType val) { return abs(val.m_value); }
 
 private:
     ValueType m_value;