From 08d8eb942dcd3ead1f654fa3acfb3968e3399614 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Wed, 1 Aug 2018 13:10:43 +1000
Subject: [PATCH] view: add iterator intersection test

---
 view.hpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/view.hpp b/view.hpp
index c64e484a..7da432a7 100644
--- a/view.hpp
+++ b/view.hpp
@@ -640,6 +640,15 @@ namespace util {
     }
 
 
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename IteratorT>
+    constexpr bool
+    intersects (util::view<IteratorT> a, IteratorT b)
+    {
+        return b >= a.begin () && b < a.end ();
+    }
+
+
     ///////////////////////////////////////////////////////////////////////////
     template <
         typename BeginA, typename EndA,