From 54f4087ab8749ad33a945c6baf3c1f3d0fae996c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Mon, 12 Dec 2016 19:43:43 +0100
Subject: [PATCH] Math: return const& from Bezier::operator[].

So constexpr access on Vector elements is possible as well.
---
 src/Magnum/Math/Bezier.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Magnum/Math/Bezier.h b/src/Magnum/Math/Bezier.h
index 7920bf914..a40051769 100644
--- a/src/Magnum/Math/Bezier.h
+++ b/src/Magnum/Math/Bezier.h
@@ -113,7 +113,8 @@ template<UnsignedInt order, UnsignedInt dimensions, class T> class Bezier {
          * @p i should not be larger than @ref Order.
          */
         Vector<dimensions, T>& operator[](std::size_t i) { return _data[i]; }
-        constexpr Vector<dimensions, T> operator[](std::size_t i) const { return _data[i]; } /**< @overload */
+        /* returns const& so [][] operations are also constexpr */
+        constexpr const Vector<dimensions, T>& operator[](std::size_t i) const { return _data[i]; } /**< @overload */
 
         /**
          * @brief Interpolate the curve at given position