Revert "SmartPtr: Remove obsolete MSVC version checks."

This reverts commit 7d1c527ac0.

include/boost/smart_ptr/detail/shared_count.hpp

@@ -148,11 +148,18 @@ public:
 #endif
     }
 
+#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1200 )
+    template<class Y, class D> shared_count( Y * p, D d ): pi_(0)
+#else
     template<class P, class D> shared_count( P p, D d ): pi_(0)
+#endif
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         , id_(shared_count_id)
 #endif
     {
+#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1200 )
+        typedef Y* P;
+#endif
 #ifndef BOOST_NO_EXCEPTIONS
 
         try

include/boost/smart_ptr/detail/sp_counted_base_w32.hpp

@@ -80,7 +80,19 @@ public:
         {
             long tmp = static_cast< long const volatile& >( use_count_ );
             if( tmp == 0 ) return false;
+
+#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, == 1200 )
+
+            // work around a code generation bug
+
+            long tmp2 = tmp + 1;
+            if( BOOST_INTERLOCKED_COMPARE_EXCHANGE( &use_count_, tmp2, tmp ) == tmp2 - 1 ) return true;
+
+#else
+
             if( BOOST_INTERLOCKED_COMPARE_EXCHANGE( &use_count_, tmp + 1, tmp ) == tmp ) return true;
+
+#endif
         }
     }
 

include/boost/smart_ptr/detail/spinlock_w32.hpp

@@ -24,7 +24,7 @@
 
 #define BOOST_COMPILER_FENCE __memory_barrier();
 
-#elif defined( _MSC_VER )
+#elif defined( _MSC_VER ) && _MSC_VER >= 1310
 
 extern "C" void _ReadWriteBarrier();
 #pragma intrinsic( _ReadWriteBarrier )

include/boost/smart_ptr/detail/yield_k.hpp

@@ -27,7 +27,7 @@
 
 // BOOST_SMT_PAUSE
 
-#if defined(_MSC_VER) && ( defined(_M_IX86) || defined(_M_X64) )
+#if defined(_MSC_VER) && _MSC_VER >= 1310 && ( defined(_M_IX86) || defined(_M_X64) )
 
 extern "C" void _mm_pause();
 

include/boost/smart_ptr/intrusive_ptr.hpp

@@ -292,7 +292,13 @@ template<class Y> std::ostream & operator<< (std::ostream & os, intrusive_ptr<Y>
 // in STLport's no-iostreams mode no iostream symbols can be used
 #ifndef _STLP_NO_IOSTREAMS
 
+# if defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, < 1300 && __SGI_STL_PORT)
+// MSVC6 has problems finding std::basic_ostream through the using declaration in namespace _STL
+using std::basic_ostream;
+template<class E, class T, class Y> basic_ostream<E, T> & operator<< (basic_ostream<E, T> & os, intrusive_ptr<Y> const & p)
+# else
 template<class E, class T, class Y> std::basic_ostream<E, T> & operator<< (std::basic_ostream<E, T> & os, intrusive_ptr<Y> const & p)
+# endif 
 {
     os << p.get();
     return os;

include/boost/smart_ptr/shared_ptr.hpp

@@ -849,7 +849,13 @@ template<class Y> std::ostream & operator<< (std::ostream & os, shared_ptr<Y> co
 // in STLport's no-iostreams mode no iostream symbols can be used
 #ifndef _STLP_NO_IOSTREAMS
 
+# if defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, < 1300 && __SGI_STL_PORT)
+// MSVC6 has problems finding std::basic_ostream through the using declaration in namespace _STL
+using std::basic_ostream;
+template<class E, class T, class Y> basic_ostream<E, T> & operator<< (basic_ostream<E, T> & os, shared_ptr<Y> const & p)
+# else
 template<class E, class T, class Y> std::basic_ostream<E, T> & operator<< (std::basic_ostream<E, T> & os, shared_ptr<Y> const & p)
+# endif
 {
     os << p.get();
     return os;

include/boost/smart_ptr/weak_ptr.hpp

@@ -136,6 +136,8 @@ public:
         boost::detail::sp_assert_convertible< Y, T >();
     }
 
+#if !defined(BOOST_MSVC) || (BOOST_MSVC >= 1300)
+
     template<class Y>
     weak_ptr & operator=( weak_ptr<Y> const & r ) BOOST_NOEXCEPT
     {
@@ -169,6 +171,8 @@ public:
         return *this;
     }
 
+#endif
+
     shared_ptr<T> lock() const BOOST_NOEXCEPT
     {
         return shared_ptr<T>( *this, boost::detail::sp_nothrow_tag() );