From 3808c9b122ace26b04a31c68c88e3869812963bf Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Mon, 25 Mar 2019 17:40:39 +0200
Subject: [PATCH] Fix variant_npos warning

---
 include/boost/variant2/variant.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/variant2/variant.hpp b/include/boost/variant2/variant.hpp
index c109632..5515600 100644
--- a/include/boost/variant2/variant.hpp
+++ b/include/boost/variant2/variant.hpp
@@ -268,7 +268,7 @@ template<std::size_t I, class... T> struct variant_alternative<I, variant<T...>>
 
 // variant_npos
 
-constexpr std::size_t variant_npos = -1;
+constexpr std::size_t variant_npos = ~static_cast<std::size_t>( 0 );
 
 // holds_alternative