From 46d383b3bd4b9edcce19f8a2fc3ec29c2931fda4 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@pdimov.com>
Date: Tue, 18 Sep 2018 22:30:56 +0300
Subject: [PATCH] Revert "Disable constexpr on msvc-14.1"

This reverts commit 3bdea5dfa3b85bde0aad2c7c7d4c31e18eaf9ed8.
---
 include/boost/system/error_code.hpp | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/include/boost/system/error_code.hpp b/include/boost/system/error_code.hpp
index 251ddce..8c433d3 100644
--- a/include/boost/system/error_code.hpp
+++ b/include/boost/system/error_code.hpp
@@ -58,12 +58,6 @@
 #  undef BOOST_SYSTEM_HAS_CONSTEXPR
 #endif
 
-#if defined(BOOST_MSVC) && BOOST_MSVC < 1920
-// msvc-14.1 does not implement correct static initialization for
-// classes with constexpr constructors
-#  undef BOOST_SYSTEM_HAS_CONSTEXPR
-#endif
-
 #if defined(BOOST_SYSTEM_HAS_CONSTEXPR)
 # define BOOST_SYSTEM_CONSTEXPR constexpr
 #else