From 585f48ce55c720a3f812f79ef57596e67f52eb89 Mon Sep 17 00:00:00 2001
From: Anna Gringauze <annagrin@microsoft.com>
Date: Sun, 19 Aug 2018 16:27:30 -0700
Subject: [PATCH] better check for branch opt (#724)

* Added c++17 test configurations for clang5.0 and clang6.0

* Simplified optimization in span::operator[]
---
 include/gsl/span | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/gsl/span b/include/gsl/span
index b3f4f83..a4f9256 100644
--- a/include/gsl/span
+++ b/include/gsl/span
@@ -545,8 +545,7 @@ private:
         // wrap around to a value always greater than size when casted.
 
         // check if we have enough space to wrap around
-        if (narrow_cast<unsigned long long>(std::numeric_limits<index_type>::max()) < 
-            narrow_cast<unsigned long long>(std::numeric_limits<size_t>::max()))
+        if (sizeof(index_type) <= sizeof(size_t))
         {
             return narrow_cast<size_t>(idx) < narrow_cast<size_t>(size);
         }