From 612747a5e1174760d71f0564a55eb4761375c709 Mon Sep 17 00:00:00 2001
From: Gary Furnish <gfurnish@gfurnish.net>
Date: Tue, 4 Oct 2016 21:13:18 -0600
Subject: For span, fix size_t to index_type conversion warning. Use narrow per
 discussion instead of static_cast.

---
 gsl/span | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gsl/span b/gsl/span
index a9a3322..62b63de 100644
--- a/gsl/span
+++ b/gsl/span
@@ -392,7 +392,7 @@ public:
                   std::is_convertible<typename Container::pointer, pointer>::value &&
                   std::is_convertible<typename Container::pointer,
                                       decltype(std::declval<Container>().data())>::value>>
-    constexpr span(Container& cont) : span(cont.data(), cont.size())
+    constexpr span(Container& cont) : span(cont.data(), narrow<index_type>(cont.size()))
     {
     }
 
@@ -402,7 +402,7 @@ public:
                   std::is_convertible<typename Container::pointer, pointer>::value &&
                   std::is_convertible<typename Container::pointer,
                                       decltype(std::declval<Container>().data())>::value>>
-    constexpr span(const Container& cont) : span(cont.data(), cont.size())
+    constexpr span(const Container& cont) : span(cont.data(), narrow<index_type>(cont.size()))
     {
     }
 
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