From 5852698f7ae8342b8aeb71395e490530b153adb4 Mon Sep 17 00:00:00 2001
From: Andrey Semashev <andrey.semashev@gmail.com>
Date: Sun, 26 May 2019 19:55:43 +0300
Subject: [PATCH] Disable variadic templates for MSVC-12 to avoid ICEs.

Fixes https://github.com/boostorg/intrusive/issues/44.
---
 include/boost/intrusive/detail/workaround.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/boost/intrusive/detail/workaround.hpp b/include/boost/intrusive/detail/workaround.hpp
index df4b700..f0cfaf2 100644
--- a/include/boost/intrusive/detail/workaround.hpp
+++ b/include/boost/intrusive/detail/workaround.hpp
@@ -23,7 +23,8 @@
 #include <boost/config.hpp>
 #endif
 
-#if    !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
+// MSVC-12 ICEs when variadic templates are enabled.
+#if    !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && (!defined(BOOST_MSVC) || BOOST_MSVC >= 1900)
    #define BOOST_INTRUSIVE_VARIADIC_TEMPLATES
 #endif