Merge "Rebase for boost 1.62.0" into tizen

1 files changed, 205 insertions, 261 deletions

diff --git a/boost/operators.hpp b/boost/operators.hpp
index 82c374ebb5..3fc08d5e8d 100644
--- a/boost/operators.hpp
+++ b/boost/operators.hpp
@@ -1,6 +1,7 @@
 //  Boost operators.hpp header file  ----------------------------------------//
 
 //  (C) Copyright David Abrahams, Jeremy Siek, Daryle Walker 1999-2001.
+//  (C) Copyright Daniel Frey 2002-2016.
 //  Distributed under the Boost Software License, Version 1.0. (See
 //  accompanying file LICENSE_1_0.txt or copy at
 //  http://www.boost.org/LICENSE_1_0.txt)
@@ -8,6 +9,8 @@
 //  See http://www.boost.org/libs/utility/operators.htm for documentation.
 
 //  Revision History
+//  22 Feb 16 Added ADL protection, preserve old work-arounds in
+//            operators_v1.hpp and clean up this file. (Daniel Frey)
 //  16 Dec 10 Limit warning suppression for 4284 to older versions of VC++
 //            (Matthew Bradbury, fixes #4432)
 //  07 Aug 08 Added "euclidean" spelling. (Daniel Frey)
@@ -24,8 +27,8 @@
 //            additional classes for groups of related operators added;
 //            workaround for empty base class optimization
 //            bug of GCC 3.0 (Helmut Zeisel)
-//  25 Jun 01 output_iterator_helper changes: removed default template 
-//            parameters, added support for self-proxying, additional 
+//  25 Jun 01 output_iterator_helper changes: removed default template
+//            parameters, added support for self-proxying, additional
 //            documentation and tests (Aleksey Gurtovoy)
 //  29 May 01 Added operator classes for << and >>.  Added input and output
 //            iterator helper classes.  Added classes to connect equality and
@@ -38,18 +41,18 @@
 //  04 Jul 00 Fixed NO_OPERATORS_IN_NAMESPACE bugs, major cleanup and
 //            refactoring of compiler workarounds, additional documentation
 //            (Alexy Gurtovoy and Mark Rodgers with some help and prompting from
-//            Dave Abrahams) 
+//            Dave Abrahams)
 //  28 Jun 00 General cleanup and integration of bugfixes from Mark Rodgers and
 //            Jeremy Siek (Dave Abrahams)
 //  20 Jun 00 Changes to accommodate Borland C++Builder 4 and Borland C++ 5.5
 //            (Mark Rodgers)
 //  20 Jun 00 Minor fixes to the prior revision (Aleksey Gurtovoy)
 //  10 Jun 00 Support for the base class chaining technique was added
-//            (Aleksey Gurtovoy). See documentation and the comments below 
-//            for the details. 
+//            (Aleksey Gurtovoy). See documentation and the comments below
+//            for the details.
 //  12 Dec 99 Initial version with iterator operators (Jeremy Siek)
 //  18 Nov 99 Change name "divideable" to "dividable", remove unnecessary
-//            specializations of dividable, subtractable, modable (Ed Brey) 
+//            specializations of dividable, subtractable, modable (Ed Brey)
 //  17 Nov 99 Add comments (Beman Dawes)
 //            Remove unnecessary specialization of operators<> (Ed Brey)
 //  15 Nov 99 Fix less_than_comparable<T,U> second operand type for first two
@@ -60,8 +63,8 @@
 //  10 Nov 99 Initial version
 
 // 10 Jun 00:
-// An additional optional template parameter was added to most of 
-// operator templates to support the base class chaining technique (see 
+// An additional optional template parameter was added to most of
+// operator templates to support the base class chaining technique (see
 // documentation for the details). Unfortunately, a straightforward
 // implementation of this change would have broken compatibility with the
 // previous version of the library by making it impossible to use the same
@@ -70,20 +73,28 @@
 // issue at the cost of some simplicity.
 //
 // One of the complications is an existence of special auxiliary class template
-// 'is_chained_base<>' (see 'detail' namespace below), which is used
+// 'is_chained_base<>' (see 'operators_detail' namespace below), which is used
 // to determine whether its template parameter is a library's operator template
-// or not. You have to specialize 'is_chained_base<>' for each new 
+// or not. You have to specialize 'is_chained_base<>' for each new
 // operator template you add to the library.
 //
-// However, most of the non-trivial implementation details are hidden behind 
+// However, most of the non-trivial implementation details are hidden behind
 // several local macros defined below, and as soon as you understand them,
-// you understand the whole library implementation. 
+// you understand the whole library implementation.
 
 #ifndef BOOST_OPERATORS_HPP
 #define BOOST_OPERATORS_HPP
 
+// If old work-arounds are needed, refer to the preserved version without
+// ADL protection.
+#if defined(BOOST_NO_OPERATORS_IN_NAMESPACE) || defined(BOOST_USE_OPERATORS_V1)
+#include "operators_v1.hpp"
+#else
+
+#include <cstddef>
+#include <iterator>
+
 #include <boost/config.hpp>
-#include <boost/iterator.hpp>
 #include <boost/detail/workaround.hpp>
 
 #if defined(__sgi) && !defined(__GNUC__)
@@ -91,35 +102,30 @@
 #endif
 
 #if BOOST_WORKAROUND(BOOST_MSVC, < 1600)
-#   pragma warning( disable : 4284 ) // complaint about return type of 
+#   pragma warning( disable : 4284 ) // complaint about return type of
 #endif                               // operator-> not begin a UDT
 
-namespace boost {
-namespace detail {
-
-template <typename T> class empty_base {};
-
-} // namespace detail
-} // namespace boost
-
 // In this section we supply the xxxx1 and xxxx2 forms of the operator
 // templates, which are explicitly targeted at the 1-type-argument and
-// 2-type-argument operator forms, respectively. Some compilers get confused
-// when inline friend functions are overloaded in namespaces other than the
-// global namespace. When BOOST_NO_OPERATORS_IN_NAMESPACE is defined, all of
-// these templates must go in the global namespace.
+// 2-type-argument operator forms, respectively.
 
-#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
 namespace boost
 {
-#endif
+namespace operators_impl
+{
+namespace operators_detail
+{
+
+template <typename T> class empty_base {};
+
+} // namespace operators_detail
 
 //  Basic operator classes (contributed by Dave Abrahams) ------------------//
 
 //  Note that friend functions defined in a class are implicitly inline.
 //  See the C++ std, 11.4 [class.friend] paragraph 5
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct less_than_comparable2 : B
 {
      friend bool operator<=(const T& x, const U& y) { return !static_cast<bool>(x > y); }
@@ -130,7 +136,7 @@ struct less_than_comparable2 : B
      friend bool operator>=(const U& x, const T& y) { return !static_cast<bool>(y > x); }
 };
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct less_than_comparable1 : B
 {
      friend bool operator>(const T& x, const T& y)  { return y < x; }
@@ -138,7 +144,7 @@ struct less_than_comparable1 : B
      friend bool operator>=(const T& x, const T& y) { return !static_cast<bool>(x < y); }
 };
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct equality_comparable2 : B
 {
      friend bool operator==(const U& y, const T& x) { return x == y; }
@@ -146,7 +152,7 @@ struct equality_comparable2 : B
      friend bool operator!=(const T& y, const U& x) { return !static_cast<bool>(y == x); }
 };
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct equality_comparable1 : B
 {
      friend bool operator!=(const T& x, const T& y) { return !static_cast<bool>(x == y); }
@@ -164,39 +170,39 @@ struct equality_comparable1 : B
 // If the compiler has no NRVO, this is the best symmetric
 // implementation available.
 
-#define BOOST_BINARY_OPERATOR_COMMUTATIVE( NAME, OP )                         \
-template <class T, class U, class B = ::boost::detail::empty_base<T> >        \
-struct NAME##2 : B                                                            \
-{                                                                             \
-  friend T operator OP( const T& lhs, const U& rhs )                          \
-    { T nrv( lhs ); nrv OP##= rhs; return nrv; }                              \
-  friend T operator OP( const U& lhs, const T& rhs )                          \
-    { T nrv( rhs ); nrv OP##= lhs; return nrv; }                              \
-};                                                                            \
-                                                                              \
-template <class T, class B = ::boost::detail::empty_base<T> >                 \
-struct NAME##1 : B                                                            \
-{                                                                             \
-  friend T operator OP( const T& lhs, const T& rhs )                          \
-    { T nrv( lhs ); nrv OP##= rhs; return nrv; }                              \
+#define BOOST_BINARY_OPERATOR_COMMUTATIVE( NAME, OP )                   \
+template <class T, class U, class B = operators_detail::empty_base<T> > \
+struct NAME##2 : B                                                      \
+{                                                                       \
+  friend T operator OP( const T& lhs, const U& rhs )                    \
+    { T nrv( lhs ); nrv OP##= rhs; return nrv; }                        \
+  friend T operator OP( const U& lhs, const T& rhs )                    \
+    { T nrv( rhs ); nrv OP##= lhs; return nrv; }                        \
+};                                                                      \
+                                                                        \
+template <class T, class B = operators_detail::empty_base<T> >          \
+struct NAME##1 : B                                                      \
+{                                                                       \
+  friend T operator OP( const T& lhs, const T& rhs )                    \
+    { T nrv( lhs ); nrv OP##= rhs; return nrv; }                        \
 };
 
 #define BOOST_BINARY_OPERATOR_NON_COMMUTATIVE( NAME, OP )               \
-template <class T, class U, class B = ::boost::detail::empty_base<T> >  \
+template <class T, class U, class B = operators_detail::empty_base<T> > \
 struct NAME##2 : B                                                      \
 {                                                                       \
   friend T operator OP( const T& lhs, const U& rhs )                    \
     { T nrv( lhs ); nrv OP##= rhs; return nrv; }                        \
 };                                                                      \
                                                                         \
-template <class T, class U, class B = ::boost::detail::empty_base<T> >  \
+template <class T, class U, class B = operators_detail::empty_base<T> > \
 struct BOOST_OPERATOR2_LEFT(NAME) : B                                   \
 {                                                                       \
   friend T operator OP( const U& lhs, const T& rhs )                    \
     { T nrv( lhs ); nrv OP##= rhs; return nrv; }                        \
 };                                                                      \
                                                                         \
-template <class T, class B = ::boost::detail::empty_base<T> >           \
+template <class T, class B = operators_detail::empty_base<T> >          \
 struct NAME##1 : B                                                      \
 {                                                                       \
   friend T operator OP( const T& lhs, const T& rhs )                    \
@@ -211,34 +217,34 @@ struct NAME##1 : B                                                      \
 // optimization opportunities to the compiler :)
 
 #define BOOST_BINARY_OPERATOR_COMMUTATIVE( NAME, OP )                   \
-template <class T, class U, class B = ::boost::detail::empty_base<T> >  \
+template <class T, class U, class B = operators_detail::empty_base<T> > \
 struct NAME##2 : B                                                      \
 {                                                                       \
   friend T operator OP( T lhs, const U& rhs ) { return lhs OP##= rhs; } \
   friend T operator OP( const U& lhs, T rhs ) { return rhs OP##= lhs; } \
 };                                                                      \
                                                                         \
-template <class T, class B = ::boost::detail::empty_base<T> >           \
+template <class T, class B = operators_detail::empty_base<T> >          \
 struct NAME##1 : B                                                      \
 {                                                                       \
   friend T operator OP( T lhs, const T& rhs ) { return lhs OP##= rhs; } \
 };
 
 #define BOOST_BINARY_OPERATOR_NON_COMMUTATIVE( NAME, OP )               \
-template <class T, class U, class B = ::boost::detail::empty_base<T> >  \
+template <class T, class U, class B = operators_detail::empty_base<T> > \
 struct NAME##2 : B                                                      \
 {                                                                       \
   friend T operator OP( T lhs, const U& rhs ) { return lhs OP##= rhs; } \
 };                                                                      \
                                                                         \
-template <class T, class U, class B = ::boost::detail::empty_base<T> >  \
+template <class T, class U, class B = operators_detail::empty_base<T> > \
 struct BOOST_OPERATOR2_LEFT(NAME) : B                                   \
 {                                                                       \
   friend T operator OP( const U& lhs, const T& rhs )                    \
     { return T( lhs ) OP##= rhs; }                                      \
 };                                                                      \
                                                                         \
-template <class T, class B = ::boost::detail::empty_base<T> >           \
+template <class T, class B = operators_detail::empty_base<T> >          \
 struct NAME##1 : B                                                      \
 {                                                                       \
   friend T operator OP( T lhs, const T& rhs ) { return lhs OP##= rhs; } \
@@ -261,7 +267,7 @@ BOOST_BINARY_OPERATOR_COMMUTATIVE( orable, | )
 
 //  incrementable and decrementable contributed by Jeremy Siek
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct incrementable : B
 {
   friend T operator++(T& x, int)
@@ -274,7 +280,7 @@ private: // The use of this typedef works around a Borland bug
   typedef T incrementable_type;
 };
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct decrementable : B
 {
   friend T operator--(T& x, int)
@@ -289,16 +295,16 @@ private: // The use of this typedef works around a Borland bug
 
 //  Iterator operator classes (contributed by Jeremy Siek) ------------------//
 
-template <class T, class P, class B = ::boost::detail::empty_base<T> >
+template <class T, class P, class B = operators_detail::empty_base<T> >
 struct dereferenceable : B
 {
   P operator->() const
-  { 
-    return &*static_cast<const T&>(*this); 
+  {
+    return &*static_cast<const T&>(*this);
   }
 };
 
-template <class T, class I, class R, class B = ::boost::detail::empty_base<T> >
+template <class T, class I, class R, class B = operators_detail::empty_base<T> >
 struct indexable : B
 {
   R operator[](I n) const
@@ -312,34 +318,34 @@ struct indexable : B
 
 #if defined(BOOST_HAS_NRVO) || defined(BOOST_FORCE_SYMMETRIC_OPERATORS)
 
-#define BOOST_BINARY_OPERATOR( NAME, OP )                                     \
-template <class T, class U, class B = ::boost::detail::empty_base<T> >        \
-struct NAME##2 : B                                                            \
-{                                                                             \
-  friend T operator OP( const T& lhs, const U& rhs )                          \
-    { T nrv( lhs ); nrv OP##= rhs; return nrv; }                              \
-};                                                                            \
-                                                                              \
-template <class T, class B = ::boost::detail::empty_base<T> >                 \
-struct NAME##1 : B                                                            \
-{                                                                             \
-  friend T operator OP( const T& lhs, const T& rhs )                          \
-    { T nrv( lhs ); nrv OP##= rhs; return nrv; }                              \
+#define BOOST_BINARY_OPERATOR( NAME, OP )                               \
+template <class T, class U, class B = operators_detail::empty_base<T> > \
+struct NAME##2 : B                                                      \
+{                                                                       \
+  friend T operator OP( const T& lhs, const U& rhs )                    \
+    { T nrv( lhs ); nrv OP##= rhs; return nrv; }                        \
+};                                                                      \
+                                                                        \
+template <class T, class B = operators_detail::empty_base<T> >          \
+struct NAME##1 : B                                                      \
+{                                                                       \
+  friend T operator OP( const T& lhs, const T& rhs )                    \
+    { T nrv( lhs ); nrv OP##= rhs; return nrv; }                        \
 };
 
 #else // defined(BOOST_HAS_NRVO) || defined(BOOST_FORCE_SYMMETRIC_OPERATORS)
 
-#define BOOST_BINARY_OPERATOR( NAME, OP )                                     \
-template <class T, class U, class B = ::boost::detail::empty_base<T> >        \
-struct NAME##2 : B                                                            \
-{                                                                             \
-  friend T operator OP( T lhs, const U& rhs ) { return lhs OP##= rhs; }       \
-};                                                                            \
-                                                                              \
-template <class T, class B = ::boost::detail::empty_base<T> >                 \
-struct NAME##1 : B                                                            \
-{                                                                             \
-  friend T operator OP( T lhs, const T& rhs ) { return lhs OP##= rhs; }       \
+#define BOOST_BINARY_OPERATOR( NAME, OP )                               \
+template <class T, class U, class B = operators_detail::empty_base<T> > \
+struct NAME##2 : B                                                      \
+{                                                                       \
+  friend T operator OP( T lhs, const U& rhs ) { return lhs OP##= rhs; } \
+};                                                                      \
+                                                                        \
+template <class T, class B = operators_detail::empty_base<T> >          \
+struct NAME##1 : B                                                      \
+{                                                                       \
+  friend T operator OP( T lhs, const T& rhs ) { return lhs OP##= rhs; } \
 };
 
 #endif // defined(BOOST_HAS_NRVO) || defined(BOOST_FORCE_SYMMETRIC_OPERATORS)
@@ -349,7 +355,7 @@ BOOST_BINARY_OPERATOR( right_shiftable, >> )
 
 #undef BOOST_BINARY_OPERATOR
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct equivalent2 : B
 {
   friend bool operator==(const T& x, const U& y)
@@ -358,7 +364,7 @@ struct equivalent2 : B
   }
 };
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct equivalent1 : B
 {
   friend bool operator==(const T&x, const T&y)
@@ -367,7 +373,7 @@ struct equivalent1 : B
   }
 };
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct partially_ordered2 : B
 {
   friend bool operator<=(const T& x, const U& y)
@@ -384,7 +390,7 @@ struct partially_ordered2 : B
     { return static_cast<bool>(y < x) || static_cast<bool>(y == x); }
 };
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct partially_ordered1 : B
 {
   friend bool operator>(const T& x, const T& y)
@@ -397,161 +403,161 @@ struct partially_ordered1 : B
 
 //  Combined operator classes (contributed by Daryle Walker) ----------------//
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct totally_ordered2
     : less_than_comparable2<T, U
     , equality_comparable2<T, U, B
       > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct totally_ordered1
     : less_than_comparable1<T
     , equality_comparable1<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct additive2
     : addable2<T, U
     , subtractable2<T, U, B
       > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct additive1
     : addable1<T
     , subtractable1<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct multiplicative2
     : multipliable2<T, U
     , dividable2<T, U, B
       > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct multiplicative1
     : multipliable1<T
     , dividable1<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct integer_multiplicative2
     : multiplicative2<T, U
     , modable2<T, U, B
       > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct integer_multiplicative1
     : multiplicative1<T
     , modable1<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct arithmetic2
     : additive2<T, U
     , multiplicative2<T, U, B
       > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct arithmetic1
     : additive1<T
     , multiplicative1<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct integer_arithmetic2
     : additive2<T, U
     , integer_multiplicative2<T, U, B
       > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct integer_arithmetic1
     : additive1<T
     , integer_multiplicative1<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct bitwise2
     : xorable2<T, U
     , andable2<T, U
     , orable2<T, U, B
       > > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct bitwise1
     : xorable1<T
     , andable1<T
     , orable1<T, B
       > > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct unit_steppable
     : incrementable<T
     , decrementable<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct shiftable2
     : left_shiftable2<T, U
     , right_shiftable2<T, U, B
       > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct shiftable1
     : left_shiftable1<T
     , right_shiftable1<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct ring_operators2
     : additive2<T, U
     , subtractable2_left<T, U
     , multipliable2<T, U, B
       > > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct ring_operators1
     : additive1<T
     , multipliable1<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct ordered_ring_operators2
     : ring_operators2<T, U
     , totally_ordered2<T, U, B
       > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct ordered_ring_operators1
     : ring_operators1<T
     , totally_ordered1<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct field_operators2
     : ring_operators2<T, U
     , dividable2<T, U
     , dividable2_left<T, U, B
       > > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct field_operators1
     : ring_operators1<T
     , dividable1<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct ordered_field_operators2
     : field_operators2<T, U
     , totally_ordered2<T, U, B
       > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct ordered_field_operators1
     : field_operators1<T
     , totally_ordered1<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct euclidian_ring_operators2
     : ring_operators2<T, U
     , dividable2<T, U
@@ -560,26 +566,26 @@ struct euclidian_ring_operators2
     , modable2_left<T, U, B
       > > > > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct euclidian_ring_operators1
     : ring_operators1<T
     , dividable1<T
     , modable1<T, B
       > > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct ordered_euclidian_ring_operators2
     : totally_ordered2<T, U
     , euclidian_ring_operators2<T, U, B
       > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct ordered_euclidian_ring_operators1
     : totally_ordered1<T
     , euclidian_ring_operators1<T, B
       > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct euclidean_ring_operators2
     : ring_operators2<T, U
     , dividable2<T, U
@@ -588,43 +594,43 @@ struct euclidean_ring_operators2
     , modable2_left<T, U, B
       > > > > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct euclidean_ring_operators1
     : ring_operators1<T
     , dividable1<T
     , modable1<T, B
       > > > {};
 
-template <class T, class U, class B = ::boost::detail::empty_base<T> >
+template <class T, class U, class B = operators_detail::empty_base<T> >
 struct ordered_euclidean_ring_operators2
     : totally_ordered2<T, U
     , euclidean_ring_operators2<T, U, B
       > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct ordered_euclidean_ring_operators1
     : totally_ordered1<T
     , euclidean_ring_operators1<T, B
       > > {};
 
-template <class T, class P, class B = ::boost::detail::empty_base<T> >
+template <class T, class P, class B = operators_detail::empty_base<T> >
 struct input_iteratable
     : equality_comparable1<T
     , incrementable<T
     , dereferenceable<T, P, B
       > > > {};
 
-template <class T, class B = ::boost::detail::empty_base<T> >
+template <class T, class B = operators_detail::empty_base<T> >
 struct output_iteratable
     : incrementable<T, B
       > {};
 
-template <class T, class P, class B = ::boost::detail::empty_base<T> >
+template <class T, class P, class B = operators_detail::empty_base<T> >
 struct forward_iteratable
     : input_iteratable<T, P, B
       > {};
 
-template <class T, class P, class B = ::boost::detail::empty_base<T> >
+template <class T, class P, class B = operators_detail::empty_base<T> >
 struct bidirectional_iteratable
     : forward_iteratable<T, P
     , decrementable<T, B
@@ -634,7 +640,7 @@ struct bidirectional_iteratable
 //  which is an indirect base class of bidirectional_iterable,
 //  random_access_iteratable must not be derived from totally_ordered1
 //  but from less_than_comparable1 only. (Helmut Zeisel, 02-Dec-2001)
-template <class T, class P, class D, class R, class B = ::boost::detail::empty_base<T> >
+template <class T, class P, class D, class R, class B = operators_detail::empty_base<T> >
 struct random_access_iteratable
     : bidirectional_iteratable<T, P
     , less_than_comparable1<T
@@ -642,124 +648,64 @@ struct random_access_iteratable
     , indexable<T, D, R, B
       > > > > {};
 
-#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
-} // namespace boost
-#endif // BOOST_NO_OPERATORS_IN_NAMESPACE
-
 
-// BOOST_IMPORT_TEMPLATE1 .. BOOST_IMPORT_TEMPLATE4 -
 //
-// When BOOST_NO_OPERATORS_IN_NAMESPACE is defined we need a way to import an
-// operator template into the boost namespace. BOOST_IMPORT_TEMPLATE1 is used
-// for one-argument forms of operator templates; BOOST_IMPORT_TEMPLATE2 for
-// two-argument forms. Note that these macros expect to be invoked from within
-// boost.
-
-#ifndef BOOST_NO_OPERATORS_IN_NAMESPACE
-
-  // The template is already in boost so we have nothing to do.
-# define BOOST_IMPORT_TEMPLATE4(template_name)
-# define BOOST_IMPORT_TEMPLATE3(template_name)
-# define BOOST_IMPORT_TEMPLATE2(template_name)
-# define BOOST_IMPORT_TEMPLATE1(template_name)
-
-#else // BOOST_NO_OPERATORS_IN_NAMESPACE
-
-#  ifndef BOOST_NO_USING_TEMPLATE
-
-     // Bring the names in with a using-declaration
-     // to avoid stressing the compiler.
-#    define BOOST_IMPORT_TEMPLATE4(template_name) using ::template_name;
-#    define BOOST_IMPORT_TEMPLATE3(template_name) using ::template_name;
-#    define BOOST_IMPORT_TEMPLATE2(template_name) using ::template_name;
-#    define BOOST_IMPORT_TEMPLATE1(template_name) using ::template_name;
-
-#  else
-
-     // Otherwise, because a Borland C++ 5.5 bug prevents a using declaration
-     // from working, we are forced to use inheritance for that compiler.
-#    define BOOST_IMPORT_TEMPLATE4(template_name)                                             \
-     template <class T, class U, class V, class W, class B = ::boost::detail::empty_base<T> > \
-     struct template_name : ::template_name<T, U, V, W, B> {};
-
-#    define BOOST_IMPORT_TEMPLATE3(template_name)                                    \
-     template <class T, class U, class V, class B = ::boost::detail::empty_base<T> > \
-     struct template_name : ::template_name<T, U, V, B> {};
-
-#    define BOOST_IMPORT_TEMPLATE2(template_name)                           \
-     template <class T, class U, class B = ::boost::detail::empty_base<T> > \
-     struct template_name : ::template_name<T, U, B> {};
-
-#    define BOOST_IMPORT_TEMPLATE1(template_name)                  \
-     template <class T, class B = ::boost::detail::empty_base<T> > \
-     struct template_name : ::template_name<T, B> {};
+// Here's where we put it all together, defining the xxxx forms of the templates.
+// We also define specializations of is_chained_base<> for
+// the xxxx, xxxx1, and xxxx2 templates.
+//
 
-#  endif // BOOST_NO_USING_TEMPLATE
+namespace operators_detail
+{
 
-#endif // BOOST_NO_OPERATORS_IN_NAMESPACE
+// A type parameter is used instead of a plain bool because Borland's compiler
+// didn't cope well with the more obvious non-type template parameter.
+struct true_t {};
+struct false_t {};
 
-//
-// Here's where we put it all together, defining the xxxx forms of the templates
-// in namespace boost. We also define specializations of is_chained_base<> for
-// the xxxx, xxxx1, and xxxx2 templates, importing them into boost:: as
-// necessary.
-//
+} // namespace operators_detail
 
 // is_chained_base<> - a traits class used to distinguish whether an operator
 // template argument is being used for base class chaining, or is specifying a
 // 2nd argument type.
 
-namespace boost {
-// A type parameter is used instead of a plain bool because Borland's compiler
-// didn't cope well with the more obvious non-type template parameter.
-namespace detail {
-  struct true_t {};
-  struct false_t {};
-} // namespace detail
-
 // Unspecialized version assumes that most types are not being used for base
 // class chaining. We specialize for the operator templates defined in this
 // library.
 template<class T> struct is_chained_base {
-  typedef ::boost::detail::false_t value;
+  typedef operators_detail::false_t value;
 };
 
-} // namespace boost
-
-// Import a 4-type-argument operator template into boost (if necessary) and
-// provide a specialization of 'is_chained_base<>' for it.
-# define BOOST_OPERATOR_TEMPLATE4(template_name4)                     \
-  BOOST_IMPORT_TEMPLATE4(template_name4)                              \
-  template<class T, class U, class V, class W, class B>               \
-  struct is_chained_base< ::boost::template_name4<T, U, V, W, B> > {  \
-    typedef ::boost::detail::true_t value;                            \
+// Provide a specialization of 'is_chained_base<>'
+// for a 4-type-argument operator template.
+# define BOOST_OPERATOR_TEMPLATE4(template_name4)           \
+  template<class T, class U, class V, class W, class B>     \
+  struct is_chained_base< template_name4<T, U, V, W, B> > { \
+    typedef operators_detail::true_t value;                 \
   };
 
-// Import a 3-type-argument operator template into boost (if necessary) and
-// provide a specialization of 'is_chained_base<>' for it.
-# define BOOST_OPERATOR_TEMPLATE3(template_name3)                     \
-  BOOST_IMPORT_TEMPLATE3(template_name3)                              \
-  template<class T, class U, class V, class B>                        \
-  struct is_chained_base< ::boost::template_name3<T, U, V, B> > {     \
-    typedef ::boost::detail::true_t value;                            \
+// Provide a specialization of 'is_chained_base<>'
+// for a 3-type-argument operator template.
+# define BOOST_OPERATOR_TEMPLATE3(template_name3)        \
+  template<class T, class U, class V, class B>           \
+  struct is_chained_base< template_name3<T, U, V, B> > { \
+    typedef operators_detail::true_t value;              \
   };
 
-// Import a 2-type-argument operator template into boost (if necessary) and
-// provide a specialization of 'is_chained_base<>' for it.
-# define BOOST_OPERATOR_TEMPLATE2(template_name2)                  \
-  BOOST_IMPORT_TEMPLATE2(template_name2)                           \
-  template<class T, class U, class B>                              \
-  struct is_chained_base< ::boost::template_name2<T, U, B> > {     \
-    typedef ::boost::detail::true_t value;                         \
+// Provide a specialization of 'is_chained_base<>'
+// for a 2-type-argument operator template.
+# define BOOST_OPERATOR_TEMPLATE2(template_name2)     \
+  template<class T, class U, class B>                 \
+  struct is_chained_base< template_name2<T, U, B> > { \
+    typedef operators_detail::true_t value;           \
   };
 
-// Import a 1-type-argument operator template into boost (if necessary) and
-// provide a specialization of 'is_chained_base<>' for it.
-# define BOOST_OPERATOR_TEMPLATE1(template_name1)                  \
-  BOOST_IMPORT_TEMPLATE1(template_name1)                           \
-  template<class T, class B>                                       \
-  struct is_chained_base< ::boost::template_name1<T, B> > {        \
-    typedef ::boost::detail::true_t value;                         \
+// Provide a specialization of 'is_chained_base<>'
+// for a 1-type-argument operator template.
+# define BOOST_OPERATOR_TEMPLATE1(template_name1)  \
+  template<class T, class B>                       \
+  struct is_chained_base< template_name1<T, B> > { \
+    typedef operators_detail::true_t value;        \
   };
 
 // BOOST_OPERATOR_TEMPLATE(template_name) defines template_name<> such that it
@@ -776,34 +722,34 @@ template<class T> struct is_chained_base {
 // implementation in terms of either '<template_name>1' or '<template_name>2'.
 //
 
-# define BOOST_OPERATOR_TEMPLATE(template_name)                    \
-template <class T                                                  \
-         ,class U = T                                              \
-         ,class B = ::boost::detail::empty_base<T>                 \
-         ,class O = typename is_chained_base<U>::value             \
-         >                                                         \
-struct template_name : template_name##2<T, U, B> {};               \
-                                                                   \
-template<class T, class U, class B>                                \
-struct template_name<T, U, B, ::boost::detail::true_t>             \
-  : template_name##1<T, U> {};                                     \
-                                                                   \
-template <class T, class B>                                        \
-struct template_name<T, T, B, ::boost::detail::false_t>            \
-  : template_name##1<T, B> {};                                     \
-                                                                   \
-template<class T, class U, class B, class O>                       \
-struct is_chained_base< ::boost::template_name<T, U, B, O> > {     \
-  typedef ::boost::detail::true_t value;                           \
-};                                                                 \
-                                                                   \
-BOOST_OPERATOR_TEMPLATE2(template_name##2)                         \
+# define BOOST_OPERATOR_TEMPLATE(template_name)                                       \
+template <class T                                                                     \
+         ,class U = T                                                                 \
+         ,class B = operators_detail::empty_base<T>                                   \
+         ,class O = typename is_chained_base<U>::value                                \
+         >                                                                            \
+struct template_name;                                                                 \
+                                                                                      \
+template<class T, class U, class B>                                                   \
+struct template_name<T, U, B, operators_detail::false_t>                              \
+  : template_name##2<T, U, B> {};                                                     \
+                                                                                      \
+template<class T, class U>                                                            \
+struct template_name<T, U, operators_detail::empty_base<T>, operators_detail::true_t> \
+  : template_name##1<T, U> {};                                                        \
+                                                                                      \
+template <class T, class B>                                                           \
+struct template_name<T, T, B, operators_detail::false_t>                              \
+  : template_name##1<T, B> {};                                                        \
+                                                                                      \
+template<class T, class U, class B, class O>                                          \
+struct is_chained_base< template_name<T, U, B, O> > {                                 \
+  typedef operators_detail::true_t value;                                             \
+};                                                                                    \
+                                                                                      \
+BOOST_OPERATOR_TEMPLATE2(template_name##2)                                            \
 BOOST_OPERATOR_TEMPLATE1(template_name##1)
 
-
-
-namespace boost {
-    
 BOOST_OPERATOR_TEMPLATE(less_than_comparable)
 BOOST_OPERATOR_TEMPLATE(equality_comparable)
 BOOST_OPERATOR_TEMPLATE(multipliable)
@@ -857,13 +803,7 @@ BOOST_OPERATOR_TEMPLATE4(random_access_iteratable)
 #undef BOOST_OPERATOR_TEMPLATE3
 #undef BOOST_OPERATOR_TEMPLATE2
 #undef BOOST_OPERATOR_TEMPLATE1
-#undef BOOST_IMPORT_TEMPLATE1
-#undef BOOST_IMPORT_TEMPLATE2
-#undef BOOST_IMPORT_TEMPLATE3
-#undef BOOST_IMPORT_TEMPLATE4
 
-// The following 'operators' classes can only be used portably if the derived class
-// declares ALL of the required member operators.
 template <class T, class U>
 struct operators2
     : totally_ordered2<T,U
@@ -891,13 +831,13 @@ template <class T,
           class R = V const &>
 struct input_iterator_helper
   : input_iteratable<T, P
-  , boost::iterator<std::input_iterator_tag, V, D, P, R
+  , std::iterator<std::input_iterator_tag, V, D, P, R
     > > {};
 
 template<class T>
 struct output_iterator_helper
   : output_iteratable<T
-  , boost::iterator<std::output_iterator_tag, void, void, void, void
+  , std::iterator<std::output_iterator_tag, void, void, void, void
   > >
 {
   T& operator*()  { return static_cast<T&>(*this); }
@@ -911,7 +851,7 @@ template <class T,
           class R = V&>
 struct forward_iterator_helper
   : forward_iteratable<T, P
-  , boost::iterator<std::forward_iterator_tag, V, D, P, R
+  , std::iterator<std::forward_iterator_tag, V, D, P, R
     > > {};
 
 template <class T,
@@ -921,17 +861,17 @@ template <class T,
           class R = V&>
 struct bidirectional_iterator_helper
   : bidirectional_iteratable<T, P
-  , boost::iterator<std::bidirectional_iterator_tag, V, D, P, R
+  , std::iterator<std::bidirectional_iterator_tag, V, D, P, R
     > > {};
 
 template <class T,
-          class V, 
+          class V,
           class D = std::ptrdiff_t,
           class P = V*,
           class R = V&>
 struct random_access_iterator_helper
   : random_access_iteratable<T, P, D, R
-  , boost::iterator<std::random_access_iterator_tag, V, D, P, R
+  , std::iterator<std::random_access_iterator_tag, V, D, P, R
     > >
 {
   friend D requires_difference_operator(const T& x, const T& y) {
@@ -939,10 +879,14 @@ struct random_access_iterator_helper
   }
 }; // random_access_iterator_helper
 
+} // namespace operators_impl
+using namespace operators_impl;
+
 } // namespace boost
 
 #if defined(__sgi) && !defined(__GNUC__)
 #pragma reset woff 1234
 #endif
 
+#endif // BOOST_NO_OPERATORS_IN_NAMESPACE
 #endif // BOOST_OPERATORS_HPP