From fb1cbd416d284ca666db942ae62f98b95f4f1244 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Sat, 24 Oct 2015 20:39:57 +0200
Subject: [PATCH] Math: document implementation reasons.

---
 src/Magnum/Math/Functions.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Magnum/Math/Functions.h b/src/Magnum/Math/Functions.h
index 4ccb2db1b..bd538a283 100644
--- a/src/Magnum/Math/Functions.h
+++ b/src/Magnum/Math/Functions.h
@@ -101,6 +101,9 @@ template<class Integral> std::pair<Integral, Integral> div(Integral x, Integral
 
 /** @todo Can't trigonometric functions be done with only one overload? */
 
+/* The functions accept Unit instead of Rad to make them working with operator
+   products (e.g. 2*35.0_degf, which is of type Unit) */
+
 /** @brief Sine */
 #ifdef DOXYGEN_GENERATING_OUTPUT
 template<class T> inline T sin(Rad<T> angle);