From 154b1c75880d2ae663716a280385acf71bef0756 Mon Sep 17 00:00:00 2001
From: q66 <daniel@octaforge.org>
Date: Sun, 21 Jun 2015 22:29:17 +0100
Subject: [PATCH] operator+ and operator- should be const

---
 octa/range.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/octa/range.h b/octa/range.h
index 5b8cacf..43aa64d 100644
--- a/octa/range.h
+++ b/octa/range.h
@@ -333,12 +333,12 @@ public:
         return octa::move(tmp);
     }
 
-    RangeHalf operator+(RangeDifference<T> n) {
+    RangeHalf operator+(RangeDifference<T> n) const {
         RangeHalf tmp(*this);
         tmp.add_n(n);
         return octa::move(tmp);
     }
-    RangeHalf operator-(RangeDifference<T> n) {
+    RangeHalf operator-(RangeDifference<T> n) const {
         RangeHalf tmp(*this);
         tmp.sub_n(n);
         return octa::move(tmp);