Update contrib/restricted/boost/utility to 1.79.0

10 files changed, 346 insertions, 118 deletions

diff --git a/contrib/restricted/boost/utility/README.md b/contrib/restricted/boost/utility/README.md
new file mode 100644
index 0000000000..7608f684f9
--- /dev/null
+++ b/contrib/restricted/boost/utility/README.md
@@ -0,0 +1,26 @@
+# ![Boost.Utility](doc/logo.png)
+
+Boost.Utility, part of collection of the [Boost C++ Libraries](https://github.com/boostorg), provides a number of smaller components, too small to be called libraries in their own right. See the documentation for the list of components.
+
+### Directories
+
+* **doc** - Documentation sources
+* **include** - Interface headers of Boost.Utility
+* **test** - Boost.Utility unit tests
+
+### More information
+
+* [Documentation](https://boost.org/libs/utility)
+* [Report bugs](https://github.com/boostorg/utility/issues/new). Be sure to mention Boost version, Boost.Utility component, platform and compiler you're using. A small compilable code sample to reproduce the problem is always good as well.
+* Submit your patches as pull requests against **develop** branch. Note that by submitting patches you agree to license your modifications under the [Boost Software License, Version 1.0](https://www.boost.org/LICENSE_1_0.txt).
+
+### Build status
+
+Branch          | GitHub Actions | AppVeyor | Test Matrix | Dependencies |
+:-------------: | -------------- | -------- | ----------- | ------------ |
+[`master`](https://github.com/boostorg/utility/tree/master) | [![GitHub Actions](https://github.com/boostorg/utility/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/boostorg/utility/actions?query=branch%3Amaster) | [![AppVeyor](https://ci.appveyor.com/api/projects/status/g09ehuy2o6aq42th/branch/master?svg=true)](https://ci.appveyor.com/project/Lastique/utility/branch/master) | [![Tests](https://img.shields.io/badge/matrix-master-brightgreen.svg)](http://www.boost.org/development/tests/master/developer/utility.html) | [![Dependencies](https://img.shields.io/badge/deps-master-brightgreen.svg)](https://pdimov.github.io/boostdep-report/master/utility.html)
+[`develop`](https://github.com/boostorg/utility/tree/develop) | [![GitHub Actions](https://github.com/boostorg/utility/actions/workflows/ci.yml/badge.svg?branch=develop)](https://github.com/boostorg/utility/actions?query=branch%3Adevelop) | [![AppVeyor](https://ci.appveyor.com/api/projects/status/g09ehuy2o6aq42th/branch/develop?svg=true)](https://ci.appveyor.com/project/Lastique/utility/branch/develop) | [![Tests](https://img.shields.io/badge/matrix-develop-brightgreen.svg)](http://www.boost.org/development/tests/develop/developer/utility.html) | [![Dependencies](https://img.shields.io/badge/deps-develop-brightgreen.svg)](https://pdimov.github.io/boostdep-report/develop/utility.html)
+
+### License
+
+Distributed under the [Boost Software License, Version 1.0](https://www.boost.org/LICENSE_1_0.txt).
diff --git a/contrib/restricted/boost/utility/include/boost/detail/call_traits.hpp b/contrib/restricted/boost/utility/include/boost/detail/call_traits.hpp
index 36dea0003a..feca93da37 100644
--- a/contrib/restricted/boost/utility/include/boost/detail/call_traits.hpp
+++ b/contrib/restricted/boost/utility/include/boost/detail/call_traits.hpp
@@ -100,7 +100,7 @@ struct call_traits<T&>
    typedef T& param_type;  // hh removed const
 };
 
-#if BOOST_WORKAROUND( __BORLANDC__,  < 0x5A0 )
+#if BOOST_WORKAROUND( BOOST_BORLANDC,  < 0x5A0 )
 // these are illegal specialisations; cv-qualifies applied to
 // references have no effect according to [8.3.2p1],
 // C++ Builder requires them though as it treats cv-qualified
diff --git a/contrib/restricted/boost/utility/include/boost/detail/compressed_pair.hpp b/contrib/restricted/boost/utility/include/boost/detail/compressed_pair.hpp
index 5dc21e23e6..28de0bfc2c 100644
--- a/contrib/restricted/boost/utility/include/boost/detail/compressed_pair.hpp
+++ b/contrib/restricted/boost/utility/include/boost/detail/compressed_pair.hpp
@@ -24,6 +24,7 @@
 
 #include <boost/type_traits/remove_cv.hpp>
 #include <boost/type_traits/is_empty.hpp>
+#include <boost/type_traits/is_final.hpp>
 #include <boost/type_traits/is_same.hpp>
 #include <boost/call_traits.hpp>
 
@@ -42,6 +43,14 @@ class compressed_pair;
 
 namespace details
 {
+   template<class T, bool E = boost::is_final<T>::value>
+   struct compressed_pair_empty
+      : ::boost::false_type { };
+
+   template<class T>
+   struct compressed_pair_empty<T, false>
+      : ::boost::is_empty<T> { };
+
    // JM altered 26 Jan 2000:
    template <class T1, class T2, bool IsSame, bool FirstEmpty, bool SecondEmpty>
    struct compressed_pair_switch;
@@ -338,13 +347,15 @@ namespace details
 
 template <class T1, class T2>
 class compressed_pair
-   : private ::boost::details::compressed_pair_imp<T1, T2,
+#ifndef BOOST_UTILITY_DOCS
+    : private ::boost::details::compressed_pair_imp<T1, T2,
              ::boost::details::compressed_pair_switch<
                     T1,
                     T2,
                     ::boost::is_same<typename remove_cv<T1>::type, typename remove_cv<T2>::type>::value,
-                    ::boost::is_empty<T1>::value,
-                    ::boost::is_empty<T2>::value>::value>
+                    ::boost::details::compressed_pair_empty<T1>::value,
+                    ::boost::details::compressed_pair_empty<T2>::value>::value>
+#endif // BOOST_UTILITY_DOCS
 {
 private:
    typedef details::compressed_pair_imp<T1, T2,
@@ -352,8 +363,8 @@ private:
                     T1,
                     T2,
                     ::boost::is_same<typename remove_cv<T1>::type, typename remove_cv<T2>::type>::value,
-                    ::boost::is_empty<T1>::value,
-                    ::boost::is_empty<T2>::value>::value> base;
+                    ::boost::details::compressed_pair_empty<T1>::value,
+                    ::boost::details::compressed_pair_empty<T2>::value>::value> base;
 public:
    typedef T1                                                 first_type;
    typedef T2                                                 second_type;
@@ -383,13 +394,15 @@ public:
 //
 template <class T>
 class compressed_pair<T, T>
+#ifndef BOOST_UTILITY_DOCS
    : private details::compressed_pair_imp<T, T,
              ::boost::details::compressed_pair_switch<
                     T,
                     T,
                     ::boost::is_same<typename remove_cv<T>::type, typename remove_cv<T>::type>::value,
-                    ::boost::is_empty<T>::value,
-                    ::boost::is_empty<T>::value>::value>
+                    ::boost::details::compressed_pair_empty<T>::value,
+                    ::boost::details::compressed_pair_empty<T>::value>::value>
+#endif // BOOST_UTILITY_DOCS
 {
 private:
    typedef details::compressed_pair_imp<T, T,
@@ -397,8 +410,8 @@ private:
                     T,
                     T,
                     ::boost::is_same<typename remove_cv<T>::type, typename remove_cv<T>::type>::value,
-                    ::boost::is_empty<T>::value,
-                    ::boost::is_empty<T>::value>::value> base;
+                    ::boost::details::compressed_pair_empty<T>::value,
+                    ::boost::details::compressed_pair_empty<T>::value>::value> base;
 public:
    typedef T                                                  first_type;
    typedef T                                                  second_type;
diff --git a/contrib/restricted/boost/utility/include/boost/operators.hpp b/contrib/restricted/boost/utility/include/boost/operators.hpp
index 156571c1a9..be56a2f880 100644
--- a/contrib/restricted/boost/utility/include/boost/operators.hpp
+++ b/contrib/restricted/boost/utility/include/boost/operators.hpp
@@ -109,6 +109,15 @@
 #   pragma warning( disable : 4284 ) // complaint about return type of
 #endif                               // operator-> not begin a UDT
 
+// Define BOOST_OPERATORS_CONSTEXPR to be like BOOST_CONSTEXPR but empty under MSVC < v19.22
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1922)
+#define BOOST_OPERATORS_CONSTEXPR
+#elif defined __sun
+#define BOOST_OPERATORS_CONSTEXPR
+#else
+#define BOOST_OPERATORS_CONSTEXPR BOOST_CONSTEXPR
+#endif
+
 // 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.
@@ -132,34 +141,34 @@ template <typename T> class empty_base {};
 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); }
-     friend bool operator>=(const T& x, const U& y) { return !static_cast<bool>(x < y); }
-     friend bool operator>(const U& x, const T& y)  { return y < x; }
-     friend bool operator<(const U& x, const T& y)  { return y > x; }
-     friend bool operator<=(const U& x, const T& y) { return !static_cast<bool>(y < x); }
-     friend bool operator>=(const U& x, const T& y) { return !static_cast<bool>(y > x); }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator<=(const T& x, const U& y) { return !static_cast<bool>(x > y); }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator>=(const T& x, const U& y) { return !static_cast<bool>(x < y); }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator>(const U& x, const T& y)  { return y < x; }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator<(const U& x, const T& y)  { return y > x; }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator<=(const U& x, const T& y) { return !static_cast<bool>(y < x); }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator>=(const U& x, const T& y) { return !static_cast<bool>(y > x); }
 };
 
 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; }
-     friend bool operator<=(const T& x, const T& y) { return !static_cast<bool>(y < x); }
-     friend bool operator>=(const T& x, const T& y) { return !static_cast<bool>(x < y); }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator>(const T& x, const T& y)  { return y < x; }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator<=(const T& x, const T& y) { return !static_cast<bool>(y < x); }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator>=(const T& x, const T& y) { return !static_cast<bool>(x < y); }
 };
 
 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; }
-     friend bool operator!=(const U& y, const T& x) { return !static_cast<bool>(x == y); }
-     friend bool operator!=(const T& y, const U& x) { return !static_cast<bool>(y == x); }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator==(const U& y, const T& x) { return x == y; }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator!=(const U& y, const T& x) { return !static_cast<bool>(x == y); }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator!=(const T& y, const U& x) { return !static_cast<bool>(y == x); }
 };
 
 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); }
+     friend BOOST_OPERATORS_CONSTEXPR bool operator!=(const T& x, const T& y) { return !static_cast<bool>(x == y); }
 };
 
 // A macro which produces "name_2left" from "name".
@@ -362,7 +371,7 @@ BOOST_BINARY_OPERATOR( right_shiftable, >> )
 template <class T, class U, class B = operators_detail::empty_base<T> >
 struct equivalent2 : B
 {
-  friend bool operator==(const T& x, const U& y)
+  friend BOOST_OPERATORS_CONSTEXPR bool operator==(const T& x, const U& y)
   {
     return !static_cast<bool>(x < y) && !static_cast<bool>(x > y);
   }
@@ -371,7 +380,7 @@ struct equivalent2 : B
 template <class T, class B = operators_detail::empty_base<T> >
 struct equivalent1 : B
 {
-  friend bool operator==(const T&x, const T&y)
+  friend BOOST_OPERATORS_CONSTEXPR bool operator==(const T&x, const T&y)
   {
     return !static_cast<bool>(x < y) && !static_cast<bool>(y < x);
   }
@@ -380,28 +389,28 @@ struct equivalent1 : B
 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)
+  friend BOOST_OPERATORS_CONSTEXPR bool operator<=(const T& x, const U& y)
     { return static_cast<bool>(x < y) || static_cast<bool>(x == y); }
-  friend bool operator>=(const T& x, const U& y)
+  friend BOOST_OPERATORS_CONSTEXPR bool operator>=(const T& x, const U& y)
     { return static_cast<bool>(x > y) || static_cast<bool>(x == y); }
-  friend bool operator>(const U& x, const T& y)
+  friend BOOST_OPERATORS_CONSTEXPR bool operator>(const U& x, const T& y)
     { return y < x; }
-  friend bool operator<(const U& x, const T& y)
+  friend BOOST_OPERATORS_CONSTEXPR bool operator<(const U& x, const T& y)
     { return y > x; }
-  friend bool operator<=(const U& x, const T& y)
+  friend BOOST_OPERATORS_CONSTEXPR bool operator<=(const U& x, const T& y)
     { return static_cast<bool>(y > x) || static_cast<bool>(y == x); }
-  friend bool operator>=(const U& x, const T& y)
+  friend BOOST_OPERATORS_CONSTEXPR bool operator>=(const U& x, const T& y)
     { return static_cast<bool>(y < x) || static_cast<bool>(y == x); }
 };
 
 template <class T, class B = operators_detail::empty_base<T> >
 struct partially_ordered1 : B
 {
-  friend bool operator>(const T& x, const T& y)
+  friend BOOST_OPERATORS_CONSTEXPR bool operator>(const T& x, const T& y)
     { return y < x; }
-  friend bool operator<=(const T& x, const T& y)
+  friend BOOST_OPERATORS_CONSTEXPR bool operator<=(const T& x, const T& y)
     { return static_cast<bool>(x < y) || static_cast<bool>(x == y); }
-  friend bool operator>=(const T& x, const T& y)
+  friend BOOST_OPERATORS_CONSTEXPR bool operator>=(const T& x, const T& y)
     { return static_cast<bool>(y < x) || static_cast<bool>(x == y); }
 };
 
diff --git a/contrib/restricted/boost/utility/include/boost/utility/base_from_member.hpp b/contrib/restricted/boost/utility/include/boost/utility/base_from_member.hpp
index 604541d19a..614fad7d49 100644
--- a/contrib/restricted/boost/utility/include/boost/utility/base_from_member.hpp
+++ b/contrib/restricted/boost/utility/include/boost/utility/base_from_member.hpp
@@ -47,13 +47,14 @@
 //         {}
 // This macro should only persist within this file.
 
+#ifndef BOOST_UTILITY_DOCS
 #define BOOST_PRIVATE_CTR_DEF( z, n, data )                   \
     template < BOOST_PP_ENUM_PARAMS(n, typename T) >          \
     base_from_member( BOOST_PP_ENUM_BINARY_PARAMS(n, T, x) )  \
         : member( BOOST_PP_ENUM_PARAMS(n, x) )                \
         {}                                                    \
     /**/
-
+#endif // BOOST_UTILITY_DOCS
 
 namespace boost
 {
diff --git a/contrib/restricted/boost/utility/include/boost/utility/binary.hpp b/contrib/restricted/boost/utility/include/boost/utility/binary.hpp
index 8cef1468e5..2c3189a604 100644
--- a/contrib/restricted/boost/utility/include/boost/utility/binary.hpp
+++ b/contrib/restricted/boost/utility/include/boost/utility/binary.hpp
@@ -68,6 +68,7 @@
   ( (0) BOOST_DETAIL_CREATE_BINARY_LITERAL_OCTAL_SEQUENCE( d, bit_groupings )  \
   ) 
 
+#ifndef BOOST_UTILITY_DOCS
 #define BOOST_DETAIL_CREATE_BINARY_LITERAL_OCTAL_SEQUENCE( d, bit_groupings )  \
   BOOST_PP_SEQ_TRANSFORM                                                       \
   ( BOOST_DETAIL_TRIPLE_TO_OCTAL_OPERATION                                     \
@@ -703,6 +704,6 @@
 #define BOOST_DETAIL_BINARY_LITERAL_ELEMENT_11111100 (1)(1)(1)(1)(1)(1)(0)(0), 
 #define BOOST_DETAIL_BINARY_LITERAL_ELEMENT_11111101 (1)(1)(1)(1)(1)(1)(0)(1), 
 #define BOOST_DETAIL_BINARY_LITERAL_ELEMENT_11111110 (1)(1)(1)(1)(1)(1)(1)(0), 
-#define BOOST_DETAIL_BINARY_LITERAL_ELEMENT_11111111 (1)(1)(1)(1)(1)(1)(1)(1), 
-
+#define BOOST_DETAIL_BINARY_LITERAL_ELEMENT_11111111 (1)(1)(1)(1)(1)(1)(1)(1),
+#endif // BOOST_UTILITY_DOCS
 #endif
diff --git a/contrib/restricted/boost/utility/include/boost/utility/detail/result_of_iterate.hpp b/contrib/restricted/boost/utility/include/boost/utility/detail/result_of_iterate.hpp
index d6538447b1..2ea594464c 100644
--- a/contrib/restricted/boost/utility/include/boost/utility/detail/result_of_iterate.hpp
+++ b/contrib/restricted/boost/utility/include/boost/utility/detail/result_of_iterate.hpp
@@ -22,7 +22,7 @@
 # define BOOST_RESULT_OF_ARGS BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)
 #endif
 
-#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
+#if !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x551))
 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
 struct tr1_result_of<F(BOOST_RESULT_OF_ARGS)>
     : conditional<
@@ -151,7 +151,7 @@ struct cpp0x_result_of_impl<F(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)),
 
 #else // defined(BOOST_RESULT_OF_USE_DECLTYPE) || defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK)
 
-#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
+#if !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x551))
 template<typename F BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
 struct result_of<F(BOOST_RESULT_OF_ARGS)>
     : tr1_result_of<F(BOOST_RESULT_OF_ARGS)> { };
@@ -177,7 +177,7 @@ struct tr1_result_of_impl<R (&)(BOOST_PP_ENUM_PARAMS(BOOST_PP_ITERATION(),T)), F
   typedef R type;
 };
 
-#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
+#if !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x551))
 template<typename R, typename FArgs BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_PP_ITERATION(),typename T)>
 struct tr1_result_of_impl<R (T0::*)
                      (BOOST_PP_ENUM_SHIFTED_PARAMS(BOOST_PP_ITERATION(),T)),
diff --git a/contrib/restricted/boost/utility/include/boost/utility/detail/result_of_variadic.hpp b/contrib/restricted/boost/utility/include/boost/utility/detail/result_of_variadic.hpp
new file mode 100644
index 0000000000..f6929f8a52
--- /dev/null
+++ b/contrib/restricted/boost/utility/include/boost/utility/detail/result_of_variadic.hpp
@@ -0,0 +1,190 @@
+// Boost result_of library
+
+//  Copyright Douglas Gregor 2004. Use, modification and
+//  distribution is subject to 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)
+
+//  Copyright Daniel Walker, Eric Niebler, Michel Morin 2008-2012.
+//  Use, modification and distribution is subject to 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)
+
+// For more information, see http://www.boost.org/libs/utility
+
+#ifndef BOOST_RESULT_OF_HPP
+# error Boost result_of - do not include this file!
+#endif
+
+template<typename F, typename... Args>
+struct tr1_result_of<F(Args...)>
+    : conditional<
+        is_pointer<F>::value || is_member_function_pointer<F>::value
+        , boost::detail::tr1_result_of_impl<
+            typename remove_cv<F>::type,
+            typename remove_cv<F>::type(Args...),
+            (boost::detail::result_of_has_result_type<F>::value)>
+        , boost::detail::tr1_result_of_impl<
+            F,
+            F(Args...),
+            (boost::detail::result_of_has_result_type<F>::value)> >::type { };
+
+#ifdef BOOST_RESULT_OF_USE_DECLTYPE
+template<typename F, typename... Args>
+struct result_of<F(Args...)>
+    : detail::cpp0x_result_of<F(Args...)> { };
+#endif // BOOST_RESULT_OF_USE_DECLTYPE
+
+#ifdef BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK
+template<typename F, typename... Args>
+struct result_of<F(Args...)>
+    : conditional<detail::result_of_has_result_type<F>::value || detail::result_of_has_result<F>::value,
+               tr1_result_of<F(Args...)>,
+               detail::cpp0x_result_of<F(Args...)> >::type { };
+#endif // BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK
+
+#if defined(BOOST_RESULT_OF_USE_DECLTYPE) || defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK)
+
+namespace detail {
+
+template<typename F, typename... Args>
+struct cpp0x_result_of<F(Args...)>
+    : conditional<
+          is_member_function_pointer<F>::value
+        , detail::tr1_result_of_impl<
+            typename remove_cv<F>::type,
+            typename remove_cv<F>::type(Args...), false
+          >
+        , detail::cpp0x_result_of_impl<
+              F(Args...)
+          >
+      >::type
+{};
+
+#ifdef BOOST_NO_SFINAE_EXPR
+
+template<typename F>
+struct result_of_callable_fun_2;
+
+template<typename R, typename... Args>
+struct result_of_callable_fun_2<R(Args...)> {
+    R operator()(Args...) const;
+    typedef result_of_private_type const &(*pfn_t)(...);
+    operator pfn_t() const volatile;
+};
+
+template<typename F>
+struct result_of_callable_fun
+  : result_of_callable_fun_2<F>
+{};
+
+template<typename F>
+struct result_of_callable_fun<F *>
+  : result_of_callable_fun_2<F>
+{};
+
+template<typename F>
+struct result_of_select_call_wrapper_type
+  : conditional<
+        is_class<typename remove_reference<F>::type>::value,
+        result_of_wrap_callable_class<F>,
+        type_identity<result_of_callable_fun<typename remove_cv<typename remove_reference<F>::type>::type> >
+    >::type
+{};
+
+template<typename F, typename... Args>
+struct result_of_is_callable {
+    typedef typename result_of_select_call_wrapper_type<F>::type wrapper_t;
+    static const bool value = (
+        sizeof(result_of_no_type) == sizeof(detail::result_of_is_private_type(
+            (boost::declval<wrapper_t>()(boost::declval<Args>()...), result_of_weird_type())
+        ))
+    );
+    typedef integral_constant<bool, value> type;
+};
+
+template<typename F, typename... Args>
+struct cpp0x_result_of_impl<F(Args...), true>
+    : lazy_enable_if<
+          result_of_is_callable<F, Args...>
+        , cpp0x_result_of_impl<F(Args...), false>
+      >
+{};
+
+template<typename F, typename... Args>
+struct cpp0x_result_of_impl<F(Args...), false>
+{
+  typedef decltype(
+    boost::declval<F>()(
+      boost::declval<Args>()...
+    )
+  ) type;
+};
+
+#else // BOOST_NO_SFINAE_EXPR
+
+template<typename F, typename... Args>
+struct cpp0x_result_of_impl<F(Args...),
+                            typename result_of_always_void<decltype(
+                                boost::declval<F>()(
+                                    boost::declval<Args>()...
+                                )
+                            )>::type> {
+  typedef decltype(
+    boost::declval<F>()(
+      boost::declval<Args>()...
+    )
+  ) type;
+};
+
+#endif // BOOST_NO_SFINAE_EXPR
+
+} // namespace detail
+
+#else // defined(BOOST_RESULT_OF_USE_DECLTYPE) || defined(BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK)
+
+template<typename F, typename... Args>
+struct result_of<F(Args...)>
+    : tr1_result_of<F(Args...)> { };
+
+#endif // defined(BOOST_RESULT_OF_USE_DECLTYPE)
+
+namespace detail {
+
+template<typename R, typename FArgs, typename... Args>
+struct tr1_result_of_impl<R (*)(Args...), FArgs, false>
+{
+  typedef R type;
+};
+
+template<typename R, typename FArgs, typename... Args>
+struct tr1_result_of_impl<R (&)(Args...), FArgs, false>
+{
+  typedef R type;
+};
+
+template<typename R, typename FArgs, typename C, typename... Args>
+struct tr1_result_of_impl<R (C::*)(Args...), FArgs, false>
+{
+  typedef R type;
+};
+
+template<typename R, typename FArgs, typename C, typename... Args>
+struct tr1_result_of_impl<R (C::*)(Args...) const, FArgs, false>
+{
+  typedef R type;
+};
+
+template<typename R, typename FArgs, typename C, typename... Args>
+struct tr1_result_of_impl<R (C::*)(Args...) volatile, FArgs, false>
+{
+  typedef R type;
+};
+
+template<typename R, typename FArgs, typename C, typename... Args>
+struct tr1_result_of_impl<R (C::*)(Args...) const volatile, FArgs, false>
+{
+  typedef R type;
+};
+
+}
diff --git a/contrib/restricted/boost/utility/include/boost/utility/result_of.hpp b/contrib/restricted/boost/utility/include/boost/utility/result_of.hpp
index 2b652ba0ca..bd926899a0 100644
--- a/contrib/restricted/boost/utility/include/boost/utility/result_of.hpp
+++ b/contrib/restricted/boost/utility/include/boost/utility/result_of.hpp
@@ -10,13 +10,6 @@
 #define BOOST_RESULT_OF_HPP
 
 #include <boost/config.hpp>
-#include <boost/preprocessor/cat.hpp>
-#include <boost/preprocessor/iteration/iterate.hpp>
-#include <boost/preprocessor/repetition/enum_params.hpp>
-#include <boost/preprocessor/repetition/enum_trailing_params.hpp>
-#include <boost/preprocessor/repetition/enum_binary_params.hpp>
-#include <boost/preprocessor/repetition/enum_shifted_params.hpp>
-#include <boost/preprocessor/facilities/intercept.hpp>
 #include <boost/detail/workaround.hpp>
 #include <boost/type_traits/is_class.hpp>
 #include <boost/type_traits/is_pointer.hpp>
@@ -29,9 +22,25 @@
 #include <boost/type_traits/integral_constant.hpp>
 #include <boost/core/enable_if.hpp>
 
+#ifdef BOOST_NO_CXX11_VARIADIC_TEMPLATES
+#  undef BOOST_RESULT_OF_NO_VARIADIC_TEMPLATES
+#  define BOOST_RESULT_OF_NO_VARIADIC_TEMPLATES
+#endif
+#ifdef BOOST_RESULT_OF_NO_VARIADIC_TEMPLATES
+#  include <boost/preprocessor/cat.hpp>
+#  include <boost/preprocessor/iteration/iterate.hpp>
+#  include <boost/preprocessor/repetition/enum_params.hpp>
+#  include <boost/preprocessor/repetition/enum_trailing_params.hpp>
+#  include <boost/preprocessor/repetition/enum_binary_params.hpp>
+#  include <boost/preprocessor/repetition/enum_shifted_params.hpp>
+#  include <boost/preprocessor/facilities/intercept.hpp>
+#endif
+
+#ifndef BOOST_UTILITY_DOCS
 #ifndef BOOST_RESULT_OF_NUM_ARGS
 #  define BOOST_RESULT_OF_NUM_ARGS 16
 #endif
+#endif // BOOST_UTILITY_DOCS
 
 // Use the decltype-based version of result_of by default if the compiler
 // supports N3276 <http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2011/n3276.pdf>.
@@ -44,6 +53,7 @@
   BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK cannot be defined at the same time.
 #endif
 
+#ifndef BOOST_UTILITY_DOCS
 #ifndef BOOST_RESULT_OF_USE_TR1
 #  ifndef BOOST_RESULT_OF_USE_DECLTYPE
 #    ifndef BOOST_RESULT_OF_USE_TR1_WITH_DECLTYPE_FALLBACK
@@ -55,6 +65,7 @@
 #    endif
 #  endif
 #endif
+#endif // BOOST_UTILITY_DOCS
 
 namespace boost {
 
@@ -108,8 +119,8 @@ template<typename F> struct cpp0x_result_of;
 
 // There doesn't seem to be any other way to turn this off such that the presence of
 // the user-defined operator,() below doesn't cause spurious warning all over the place,
-// so unconditionally turn it off.
-#if BOOST_MSVC
+// so unconditionally and globally turn it off. (https://svn.boost.org/trac10/ticket/7663)
+#ifdef BOOST_MSVC
 #  pragma warning(disable: 4913) // user defined binary operator ',' exists but no overload could convert all operands, default built-in binary operator ',' used
 #endif
 
@@ -123,12 +134,19 @@ template<typename T>
 result_of_no_type result_of_is_private_type(T const &);
 result_of_yes_type result_of_is_private_type(result_of_private_type);
 
+#ifdef BOOST_MSVC
+#  pragma warning(push)
+#  pragma warning(disable: 4512) // assignment operator could not be generated.
+#endif
 template<typename C>
 struct result_of_callable_class : C {
     result_of_callable_class();
     typedef result_of_private_type const &(*pfn_t)(...);
     operator pfn_t() const volatile;
 };
+#ifdef BOOST_MSVC
+#  pragma warning(pop)
+#endif
 
 template<typename C>
 struct result_of_wrap_callable_class {
@@ -217,8 +235,12 @@ struct tr1_result_of_impl<F, FArgs, false>
 
 } // end namespace detail
 
-#define BOOST_PP_ITERATION_PARAMS_1 (3,(0,BOOST_RESULT_OF_NUM_ARGS,<boost/utility/detail/result_of_iterate.hpp>))
-#include BOOST_PP_ITERATE()
+#ifndef BOOST_RESULT_OF_NO_VARIADIC_TEMPLATES
+#  include <boost/utility/detail/result_of_variadic.hpp>
+#else
+#  define BOOST_PP_ITERATION_PARAMS_1 (3,(0,BOOST_RESULT_OF_NUM_ARGS,<boost/utility/detail/result_of_iterate.hpp>))
+#  include BOOST_PP_ITERATE()
+#endif
 
 #if 0
 // inform dependency trackers, as they can't see through macro includes
diff --git a/contrib/restricted/boost/utility/include/boost/utility/value_init.hpp b/contrib/restricted/boost/utility/include/boost/utility/value_init.hpp
index 9d8de70733..f3d940b1e9 100644
--- a/contrib/restricted/boost/utility/include/boost/utility/value_init.hpp
+++ b/contrib/restricted/boost/utility/include/boost/utility/value_init.hpp
@@ -1,4 +1,5 @@
 // (C) Copyright 2002-2008, Fernando Luis Cacciola Carballal.
+// Copyright 2020 Peter Dimov
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -21,15 +22,10 @@
 // issues, by clearing the bytes of T, before constructing the T object it
 // contains. More details on these issues are at libs/utility/value_init.htm
 
-#include <boost/aligned_storage.hpp>
 #include <boost/config.hpp> // For BOOST_NO_COMPLETE_VALUE_INITIALIZATION.
-#include <boost/detail/workaround.hpp>
-#include <boost/static_assert.hpp>
-#include <boost/type_traits/cv_traits.hpp>
-#include <boost/type_traits/alignment_of.hpp>
 #include <boost/swap.hpp>
 #include <cstring>
-#include <new>
+#include <cstddef>
 
 #ifdef BOOST_MSVC
 #pragma warning(push)
@@ -41,6 +37,8 @@
 #pragma warning(disable: 4512)
 #endif
 
+#ifndef BOOST_UTILITY_DOCS
+
 #ifdef BOOST_NO_COMPLETE_VALUE_INITIALIZATION
   // Implementation detail: The macro BOOST_DETAIL_VALUE_INIT_WORKAROUND_SUGGESTED 
   // suggests that a workaround should be applied, because of compiler issues 
@@ -58,94 +56,62 @@
   #endif
 #endif
 
+#endif // BOOST_UTILITY_DOCS
+
 namespace boost {
 
-template<class T>
-class initialized
-{
-  private :
-    struct wrapper
+namespace detail {
+
+  struct zero_init
+  {
+    zero_init()
     {
-#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x592))
-      typename
-#endif 
-      remove_const<T>::type data;
-
-      BOOST_GPU_ENABLED
-      wrapper()
-      :
-      data()
-      {
-      }
-
-      BOOST_GPU_ENABLED
-      wrapper(T const & arg)
-      :
-      data(arg)
-      {
-      }
-    };
-
-    mutable
-#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x592))
-      typename
-#endif 
-      aligned_storage<sizeof(wrapper), alignment_of<wrapper>::value>::type x;
+    }
 
-    BOOST_GPU_ENABLED
-    wrapper * wrapper_address() const
+    zero_init( void * p, std::size_t n )
     {
-      return static_cast<wrapper *>( static_cast<void*>(&x));
+      std::memset( p, 0, n );
     }
+  };
 
-  public :
+} // namespace detail
 
-    BOOST_GPU_ENABLED
-    initialized()
-    {
+template<class T>
+class initialized
 #if BOOST_DETAIL_VALUE_INIT_WORKAROUND
-      std::memset(&x, 0, sizeof(x));
+  : detail::zero_init
 #endif
-      new (wrapper_address()) wrapper();
-    }
+{
+  private:
 
-    BOOST_GPU_ENABLED
-    initialized(initialized const & arg)
-    {
-      new (wrapper_address()) wrapper( static_cast<wrapper const &>(*(arg.wrapper_address())));
-    }
+    T data_;
 
-    BOOST_GPU_ENABLED
-    explicit initialized(T const & arg)
-    {
-      new (wrapper_address()) wrapper(arg);
-    }
+  public :
 
     BOOST_GPU_ENABLED
-    initialized & operator=(initialized const & arg)
+    initialized():
+#if BOOST_DETAIL_VALUE_INIT_WORKAROUND
+      zero_init( &const_cast< char& >( reinterpret_cast<char const volatile&>( data_ ) ), sizeof( data_ ) ),
+#endif
+      data_()
     {
-      // Assignment is only allowed when T is non-const.
-      BOOST_STATIC_ASSERT( ! is_const<T>::value );
-      *wrapper_address() = static_cast<wrapper const &>(*(arg.wrapper_address()));
-      return *this;
     }
 
     BOOST_GPU_ENABLED
-    ~initialized()
+    explicit initialized(T const & arg): data_( arg )
     {
-      wrapper_address()->wrapper::~wrapper();
     }
 
     BOOST_GPU_ENABLED
     T const & data() const
     {
-      return wrapper_address()->data;
+      return data_;
     }
 
     BOOST_GPU_ENABLED
     T& data()
     {
-      return wrapper_address()->data;
+      return data_;
     }
 
     BOOST_GPU_ENABLED
@@ -157,13 +123,13 @@ class initialized
     BOOST_GPU_ENABLED
     operator T const &() const
     {
-      return wrapper_address()->data;
+      return data_;
     }
 
     BOOST_GPU_ENABLED
     operator T&()
     {
-      return wrapper_address()->data;
+      return data_;
     }
 
 } ;