From c8cd48952f8b6bd9094664d42184558cf0669951 Mon Sep 17 00:00:00 2001
From: Aleksey Gurtovoy <agurtovoy@meta-comm.com>
Date: Wed, 27 Nov 2002 09:20:43 +0000
Subject: [PATCH] revert 'sequence_tag' for MSVC

[SVN r16438]
---
 include/boost/mpl/sequence_tag.hpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/include/boost/mpl/sequence_tag.hpp b/include/boost/mpl/sequence_tag.hpp
index 40fd291..e3beb43 100644
--- a/include/boost/mpl/sequence_tag.hpp
+++ b/include/boost/mpl/sequence_tag.hpp
@@ -27,6 +27,10 @@
 
 namespace boost { namespace mpl {
 
+// agurt, 27/nov/02: have to use a simplistic 'sequence_tag' implementation
+// on MSVC to avoid dreadful "internal structure overflow" error
+#if !defined(BOOST_MSVC) || BOOST_MSVC > 1300
+
 namespace aux {
 
 template< bool has_tag_, bool has_begin_ >
@@ -88,6 +92,19 @@ struct sequence_tag
 {
 };
 
+#else 
+
+template<
+      typename BOOST_MPL_AUX_VOID_SPEC_PARAM(Sequence)
+    >
+struct sequence_tag
+{
+    typedef typename Sequence::tag type;
+};
+
+#endif // BOOST_MSVC
+
+
 #if defined(BOOST_MPL_MSVC_ETI_BUG)
 template<> struct sequence_tag<int>
 {