Reorder includes to work around an odd msvc-14.0 bug

example/hash_value.cpp

@@ -1,11 +1,12 @@
-// Copyright 2021 Peter Dimov
+// Copyright 2021, 2022 Peter Dimov
 // Distributed under the Boost Software License, Version 1.0.
 // https://www.boost.org/LICENSE_1_0.txt
 
+#include <boost/container_hash/hash.hpp>
 #include <boost/describe.hpp>
 #include <boost/mp11.hpp>
-#include <boost/container_hash/hash.hpp>
 #include <boost/variant2/variant.hpp>
+#include <boost/version.hpp>
 #include <vector>
 
 using namespace boost::describe;
@@ -13,6 +14,8 @@ using namespace boost::describe;
 namespace app
 {
 
+#if BOOST_VERSION < 108100
+
 template<class T,
     class Bd = describe_bases<T, mod_any_access>,
     class Md = describe_members<T, mod_any_access>,
@@ -37,6 +40,8 @@ template<class T,
     return r;
 }
 
+#endif
+
 struct A
 {
     int x = 1;

test/Jamfile

@@ -85,7 +85,7 @@ explicit describe_cxx14 ;
 
 local CXX14 = [ check-target-builds describe_cxx14 describe_cxx14 : : <build>no ] "<toolset>msvc-14.0:<cxxflags>-wd4100" ;
 
-local JSON = <library>/boost//json/<warnings>off "<toolset>msvc-14.0:<build>no" "<toolset>msvc-14.2:<cxxflags>-wd5104" ;
+local JSON = <library>/boost//json/<warnings>off "<toolset>msvc-14.2:<cxxflags>-wd5104" ;
 local SERIALIZATION = <library>/boost//serialization/<warnings>off "-<toolset>clang:<warnings-as-errors>on" ;
 
 run ../example/printing_enums_ct.cpp : : : $(CXX14) ;