Use BOOST_INLINE_CONSTEXPR for placeholders if inline variables are supported

Changes for Embarcadero C++ clang-based compilers, targeting Boost 1.74. Change __BORLANDC__ to BOOST_BORLANDC, which is defined in Boost conf…

.travis.yml

@@ -4,8 +4,6 @@
 
 language: cpp
 
-sudo: false
-
 dist: xenial
 
 branches:
@@ -128,6 +126,17 @@ matrix:
           sources:
             - ubuntu-toolchain-r-test
 
+    - os: linux
+      dist: bionic
+      compiler: g++-10
+      env: TOOLSET=gcc COMPILER=g++-10 CXXSTD=03,11,14,17,2a
+      addons:
+        apt:
+          packages:
+            - g++-10
+          sources:
+            - ubuntu-toolchain-r-test
+
     - os: linux
       compiler: clang++
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11
@@ -264,6 +273,18 @@ matrix:
             - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-9 main'
               key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
 
+    - os: linux
+      compiler: clang++-10
+      env: TOOLSET=clang COMPILER=clang++-10 CXXSTD=03,11,14,17,2a
+      addons:
+        apt:
+          packages:
+            - clang-10
+          sources:
+            - ubuntu-toolchain-r-test
+            - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-10 main'
+              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
+
     - os: linux
       dist: trusty
       compiler: clang++-libc++
@@ -273,6 +294,15 @@ matrix:
           packages:
             - libc++-dev
 
+    - os: linux
+      dist: bionic
+      compiler: clang++-libc++
+      env: TOOLSET=clang COMPILER=clang++-libc++ CXXSTD=03,11,14,17,2a
+      addons:
+        apt:
+          packages:
+            - libc++-dev
+
     - os: osx
       compiler: clang++
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
@@ -301,8 +331,9 @@ matrix:
     - os: linux
       env: CMAKE_INSTALL_TEST=1
       script:
+        - pip install --user cmake
         - mkdir __build__ && cd __build__
-        - cmake -DBOOST_ENABLE_CMAKE=1 -DBoost_VERBOSE=1 -DBOOST_INCLUDE_LIBRARIES="assert;bind;config;core" -DCMAKE_INSTALL_PREFIX=~/.local ..
+        - cmake -DBOOST_ENABLE_CMAKE=1 -DBoost_VERBOSE=1 -DBOOST_INCLUDE_LIBRARIES=bind -DCMAKE_INSTALL_PREFIX=~/.local ..
         - cmake --build . --target install
         - cd ../libs/bind/test/cmake_install_test && mkdir __build__ && cd __build__
         - cmake -DCMAKE_INSTALL_PREFIX=~/.local ..

CMakeLists.txt

@@ -17,13 +17,6 @@ target_link_libraries(boost_bind
     Boost::core
 )
 
-if(BOOST_SUPERPROJECT_VERSION)
-
-  include(BoostInstall)
-  boost_install(TARGETS boost_bind HEADER_DIRECTORY include/)
-
-endif()
-
 if(BUILD_TESTING)
 
   add_subdirectory(test)

appveyor.yml

@@ -1,4 +1,4 @@
-# Copyright 2016-2019 Peter Dimov
+# Copyright 2016-2020 Peter Dimov
 # Distributed under the Boost Software License, Version 1.0.
 # (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
 
@@ -23,6 +23,10 @@ environment:
       TOOLSET: msvc-14.1,clang-win
       CXXSTD: 14,17
       ADDRESS_MODEL: 32,64
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+      TOOLSET: msvc-14.2
+      CXXSTD: 14,17,latest
+      ADDRESS_MODEL: 32,64
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
       ADDPATH: C:\cygwin\bin;
       TOOLSET: gcc

include/boost/bind/bind.hpp

@@ -27,6 +27,7 @@
 #include <boost/type.hpp>
 #include <boost/is_placeholder.hpp>
 #include <boost/bind/arg.hpp>
+#include <boost/bind/detail/result_traits.hpp>
 #include <boost/detail/workaround.hpp>
 #include <boost/visit_each.hpp>
 #include <boost/core/enable_if.hpp>
@@ -38,7 +39,7 @@
 
 // Borland-specific bug, visit_each() silently fails to produce code
 
-#if defined(__BORLANDC__)
+#if defined(BOOST_BORLANDC)
 #  define BOOST_BIND_VISIT_EACH boost::visit_each
 #else
 #  define BOOST_BIND_VISIT_EACH visit_each
@@ -59,29 +60,6 @@ template<class T> class weak_ptr;
 namespace _bi // implementation details
 {
 
-// result_traits
-
-template<class R, class F> struct result_traits
-{
-    typedef R type;
-};
-
-#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
-
-struct unspecified {};
-
-template<class F> struct result_traits<unspecified, F>
-{
-    typedef typename F::result_type type;
-};
-
-template<class F> struct result_traits< unspecified, reference_wrapper<F> >
-{
-    typedef typename F::result_type type;
-};
-
-#endif
-
 // ref_compare
 
 template<class T> bool ref_compare( T const & a, T const & b, long )
@@ -1422,7 +1400,7 @@ public:
 
     template<class V> void accept( V & v ) const
     {
-#if !defined( BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP ) && !defined( __BORLANDC__ )
+#if !defined( BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP ) && !defined( BOOST_BORLANDC )
         using boost::visit_each;
 #endif
 
@@ -1559,7 +1537,7 @@ namespace _bi
 
 #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) || (__SUNPRO_CC >= 0x530)
 
-#if defined( __BORLANDC__ ) && BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT(0x582) )
+#if defined( BOOST_BORLANDC ) && BOOST_WORKAROUND( BOOST_BORLANDC, BOOST_TESTED_AT(0x582) )
 
 template<class T> struct add_value
 {
@@ -1811,7 +1789,7 @@ BOOST_BIND_OPERATOR( >=, greater_equal )
 
 // visit_each, ADL
 
-#if !defined( BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP ) && !defined( __BORLANDC__ ) \
+#if !defined( BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP ) && !defined( BOOST_BORLANDC ) \
    && !(defined(__GNUC__) && __GNUC__ == 3 && __GNUC_MINOR__ <= 3)
 
 template<class V, class T> void visit_each( V & v, value<T> const & t, int )
@@ -1831,7 +1809,7 @@ template<class V, class R, class F, class L> void visit_each( V & v, bind_t<R, F
 
 // visit_each, no ADL
 
-#if defined( BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP ) || defined( __BORLANDC__ ) \
+#if defined( BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP ) || defined( BOOST_BORLANDC ) \
   || (defined(__GNUC__) && __GNUC__ == 3 && __GNUC_MINOR__ <= 3)
 
 template<class V, class T> void visit_each( V & v, _bi::value<T> const & t, int )
@@ -2245,7 +2223,7 @@ template<class F, class A1, class A2, class A3, class A4, class A5, class A6, cl
 // data member pointers
 
 #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) || defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING) \
-    || ( defined(__BORLANDC__) && BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT( 0x620 ) ) )
+    || ( defined(BOOST_BORLANDC) && BOOST_WORKAROUND( BOOST_BORLANDC, BOOST_TESTED_AT( 0x620 ) ) )
 
 template<class R, class T, class A1>
 _bi::bind_t< R, _mfi::dm<R, T>, typename _bi::list_av_1<A1>::type >

include/boost/bind/bind_template.hpp

@@ -325,7 +325,7 @@
 
     template<class V> void accept(V & v) const
     {
-#if !defined( BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP ) && !defined( __BORLANDC__ )
+#if !defined( BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP ) && !defined( BOOST_BORLANDC )
 
         using boost::visit_each;
 

include/boost/bind/detail/result_traits.hpp

@@ -0,0 +1,154 @@
+#ifndef BOOST_BIND_DETAIL_RESULT_TRAITS_HPP_INCLUDED
+#define BOOST_BIND_DETAIL_RESULT_TRAITS_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  bind/detail/result_traits.hpp
+//
+//  boost/bind.hpp support header, return type deduction
+//
+//  Copyright 2006, 2020 Peter Dimov
+//
+//  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
+//
+//  See http://www.boost.org/libs/bind/bind.html for documentation.
+//
+
+#if defined(_MSVC_LANG) && _MSVC_LANG >= 17
+#include <functional>
+#endif
+
+namespace boost
+{
+
+namespace _bi
+{
+
+template<class R, class F> struct result_traits
+{
+    typedef R type;
+};
+
+struct unspecified {};
+
+template<class F> struct result_traits<unspecified, F>
+{
+    typedef typename F::result_type type;
+};
+
+template<class F> struct result_traits< unspecified, reference_wrapper<F> >
+{
+    typedef typename F::result_type type;
+};
+
+#if defined(_MSVC_LANG) && _MSVC_LANG >= 17
+
+template<class T> struct result_traits< unspecified, std::plus<T> >
+{
+    typedef T type;
+};
+
+template<class T> struct result_traits< unspecified, std::minus<T> >
+{
+    typedef T type;
+};
+
+template<class T> struct result_traits< unspecified, std::multiplies<T> >
+{
+    typedef T type;
+};
+
+template<class T> struct result_traits< unspecified, std::divides<T> >
+{
+    typedef T type;
+};
+
+template<class T> struct result_traits< unspecified, std::modulus<T> >
+{
+    typedef T type;
+};
+
+template<class T> struct result_traits< unspecified, std::negate<T> >
+{
+    typedef T type;
+};
+
+template<class T> struct result_traits< unspecified, std::equal_to<T> >
+{
+    typedef bool type;
+};
+
+template<class T> struct result_traits< unspecified, std::not_equal_to<T> >
+{
+    typedef bool type;
+};
+
+template<class T> struct result_traits< unspecified, std::greater<T> >
+{
+    typedef bool type;
+};
+
+template<class T> struct result_traits< unspecified, std::less<T> >
+{
+    typedef bool type;
+};
+
+template<class T> struct result_traits< unspecified, std::greater_equal<T> >
+{
+    typedef bool type;
+};
+
+template<class T> struct result_traits< unspecified, std::less_equal<T> >
+{
+    typedef bool type;
+};
+
+template<class T> struct result_traits< unspecified, std::logical_and<T> >
+{
+    typedef bool type;
+};
+
+template<class T> struct result_traits< unspecified, std::logical_or<T> >
+{
+    typedef bool type;
+};
+
+template<class T> struct result_traits< unspecified, std::logical_not<T> >
+{
+    typedef bool type;
+};
+
+template<class T> struct result_traits< unspecified, std::bit_and<T> >
+{
+    typedef T type;
+};
+
+template<class T> struct result_traits< unspecified, std::bit_or<T> >
+{
+    typedef T type;
+};
+
+template<class T> struct result_traits< unspecified, std::bit_xor<T> >
+{
+    typedef T type;
+};
+
+template<class T> struct result_traits< unspecified, std::bit_not<T> >
+{
+    typedef T type;
+};
+
+#endif
+
+} // namespace _bi
+
+} // namespace boost
+
+#endif // #ifndef BOOST_BIND_DETAIL_RESULT_TRAITS_HPP_INCLUDED

include/boost/bind/mem_fn.hpp

@@ -264,21 +264,31 @@ namespace _mfi
 
 #define BOOST_MEM_FN_NAME(X) X
 #define BOOST_MEM_FN_CC
+#define BOOST_MEM_FN_NOEXCEPT
 
 #include <boost/bind/mem_fn_cc.hpp>
 
+#if defined( __cpp_noexcept_function_type ) || defined( _NOEXCEPT_TYPES_SUPPORTED )
+#  undef BOOST_MEM_FN_NOEXCEPT
+#  define BOOST_MEM_FN_NOEXCEPT noexcept
+#  include <boost/bind/mem_fn_cc.hpp>
+#endif
+
 #undef BOOST_MEM_FN_NAME
 #undef BOOST_MEM_FN_CC
+#undef BOOST_MEM_FN_NOEXCEPT
 
 #if defined(BOOST_MEM_FN_ENABLE_CDECL) && !defined(_M_X64)
 
 #define BOOST_MEM_FN_NAME(X) X##_cdecl
 #define BOOST_MEM_FN_CC __cdecl
+#define BOOST_MEM_FN_NOEXCEPT
 
 #include <boost/bind/mem_fn_cc.hpp>
 
 #undef BOOST_MEM_FN_NAME
 #undef BOOST_MEM_FN_CC
+#undef BOOST_MEM_FN_NOEXCEPT
 
 #endif
 
@@ -286,11 +296,13 @@ namespace _mfi
 
 #define BOOST_MEM_FN_NAME(X) X##_stdcall
 #define BOOST_MEM_FN_CC __stdcall
+#define BOOST_MEM_FN_NOEXCEPT
 
 #include <boost/bind/mem_fn_cc.hpp>
 
 #undef BOOST_MEM_FN_NAME
 #undef BOOST_MEM_FN_CC
+#undef BOOST_MEM_FN_NOEXCEPT
 
 #endif
 
@@ -298,11 +310,13 @@ namespace _mfi
 
 #define BOOST_MEM_FN_NAME(X) X##_fastcall
 #define BOOST_MEM_FN_CC __fastcall
+#define BOOST_MEM_FN_NOEXCEPT
 
 #include <boost/bind/mem_fn_cc.hpp>
 
 #undef BOOST_MEM_FN_NAME
 #undef BOOST_MEM_FN_CC
+#undef BOOST_MEM_FN_NOEXCEPT
 
 #endif
 

include/boost/bind/mem_fn_cc.hpp

@@ -12,92 +12,92 @@
 //  See http://www.boost.org/libs/bind/mem_fn.html for documentation.
 //
 
-template<class R, class T> _mfi::BOOST_MEM_FN_NAME(mf0)<R, T> mem_fn(R (BOOST_MEM_FN_CC T::*f) ())
+template<class R, class T> _mfi::BOOST_MEM_FN_NAME(mf0)<R, T> mem_fn(R (BOOST_MEM_FN_CC T::*f) () BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(mf0)<R, T>(f);
 }
 
-template<class R, class T> _mfi::BOOST_MEM_FN_NAME(cmf0)<R, T> mem_fn(R (BOOST_MEM_FN_CC T::*f) () const)
+template<class R, class T> _mfi::BOOST_MEM_FN_NAME(cmf0)<R, T> mem_fn(R (BOOST_MEM_FN_CC T::*f) () const BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(cmf0)<R, T>(f);
 }
 
-template<class R, class T, class A1> _mfi::BOOST_MEM_FN_NAME(mf1)<R, T, A1> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1))
+template<class R, class T, class A1> _mfi::BOOST_MEM_FN_NAME(mf1)<R, T, A1> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1) BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(mf1)<R, T, A1>(f);
 }
 
-template<class R, class T, class A1> _mfi::BOOST_MEM_FN_NAME(cmf1)<R, T, A1> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1) const)
+template<class R, class T, class A1> _mfi::BOOST_MEM_FN_NAME(cmf1)<R, T, A1> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1) const BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(cmf1)<R, T, A1>(f);
 }
 
-template<class R, class T, class A1, class A2> _mfi::BOOST_MEM_FN_NAME(mf2)<R, T, A1, A2> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2))
+template<class R, class T, class A1, class A2> _mfi::BOOST_MEM_FN_NAME(mf2)<R, T, A1, A2> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2) BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(mf2)<R, T, A1, A2>(f);
 }
 
-template<class R, class T, class A1, class A2> _mfi::BOOST_MEM_FN_NAME(cmf2)<R, T, A1, A2> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2) const)
+template<class R, class T, class A1, class A2> _mfi::BOOST_MEM_FN_NAME(cmf2)<R, T, A1, A2> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2) const BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(cmf2)<R, T, A1, A2>(f);
 }
 
-template<class R, class T, class A1, class A2, class A3> _mfi::BOOST_MEM_FN_NAME(mf3)<R, T, A1, A2, A3> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3))
+template<class R, class T, class A1, class A2, class A3> _mfi::BOOST_MEM_FN_NAME(mf3)<R, T, A1, A2, A3> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3) BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(mf3)<R, T, A1, A2, A3>(f);
 }
 
-template<class R, class T, class A1, class A2, class A3> _mfi::BOOST_MEM_FN_NAME(cmf3)<R, T, A1, A2, A3> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3) const)
+template<class R, class T, class A1, class A2, class A3> _mfi::BOOST_MEM_FN_NAME(cmf3)<R, T, A1, A2, A3> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3) const BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(cmf3)<R, T, A1, A2, A3>(f);
 }
 
-template<class R, class T, class A1, class A2, class A3, class A4> _mfi::BOOST_MEM_FN_NAME(mf4)<R, T, A1, A2, A3, A4> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4))
+template<class R, class T, class A1, class A2, class A3, class A4> _mfi::BOOST_MEM_FN_NAME(mf4)<R, T, A1, A2, A3, A4> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4) BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(mf4)<R, T, A1, A2, A3, A4>(f);
 }
 
-template<class R, class T, class A1, class A2, class A3, class A4> _mfi::BOOST_MEM_FN_NAME(cmf4)<R, T, A1, A2, A3, A4> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4) const)
+template<class R, class T, class A1, class A2, class A3, class A4> _mfi::BOOST_MEM_FN_NAME(cmf4)<R, T, A1, A2, A3, A4> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4) const BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(cmf4)<R, T, A1, A2, A3, A4>(f);
 }
 
-template<class R, class T, class A1, class A2, class A3, class A4, class A5> _mfi::BOOST_MEM_FN_NAME(mf5)<R, T, A1, A2, A3, A4, A5> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5))
+template<class R, class T, class A1, class A2, class A3, class A4, class A5> _mfi::BOOST_MEM_FN_NAME(mf5)<R, T, A1, A2, A3, A4, A5> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5) BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(mf5)<R, T, A1, A2, A3, A4, A5>(f);
 }
 
-template<class R, class T, class A1, class A2, class A3, class A4, class A5> _mfi::BOOST_MEM_FN_NAME(cmf5)<R, T, A1, A2, A3, A4, A5> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5) const)
+template<class R, class T, class A1, class A2, class A3, class A4, class A5> _mfi::BOOST_MEM_FN_NAME(cmf5)<R, T, A1, A2, A3, A4, A5> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5) const BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(cmf5)<R, T, A1, A2, A3, A4, A5>(f);
 }
 
-template<class R, class T, class A1, class A2, class A3, class A4, class A5, class A6> _mfi::BOOST_MEM_FN_NAME(mf6)<R, T, A1, A2, A3, A4, A5, A6> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5, A6))
+template<class R, class T, class A1, class A2, class A3, class A4, class A5, class A6> _mfi::BOOST_MEM_FN_NAME(mf6)<R, T, A1, A2, A3, A4, A5, A6> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5, A6) BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(mf6)<R, T, A1, A2, A3, A4, A5, A6>(f);
 }
 
-template<class R, class T, class A1, class A2, class A3, class A4, class A5, class A6> _mfi::BOOST_MEM_FN_NAME(cmf6)<R, T, A1, A2, A3, A4, A5, A6> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5, A6) const)
+template<class R, class T, class A1, class A2, class A3, class A4, class A5, class A6> _mfi::BOOST_MEM_FN_NAME(cmf6)<R, T, A1, A2, A3, A4, A5, A6> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5, A6) const BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(cmf6)<R, T, A1, A2, A3, A4, A5, A6>(f);
 }
 
-template<class R, class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7> _mfi::BOOST_MEM_FN_NAME(mf7)<R, T, A1, A2, A3, A4, A5, A6, A7> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5, A6, A7))
+template<class R, class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7> _mfi::BOOST_MEM_FN_NAME(mf7)<R, T, A1, A2, A3, A4, A5, A6, A7> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5, A6, A7) BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(mf7)<R, T, A1, A2, A3, A4, A5, A6, A7>(f);
 }
 
-template<class R, class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7> _mfi::BOOST_MEM_FN_NAME(cmf7)<R, T, A1, A2, A3, A4, A5, A6, A7> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5, A6, A7) const)
+template<class R, class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7> _mfi::BOOST_MEM_FN_NAME(cmf7)<R, T, A1, A2, A3, A4, A5, A6, A7> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5, A6, A7) const BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(cmf7)<R, T, A1, A2, A3, A4, A5, A6, A7>(f);
 }
 
-template<class R, class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8> _mfi::BOOST_MEM_FN_NAME(mf8)<R, T, A1, A2, A3, A4, A5, A6, A7, A8> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5, A6, A7, A8))
+template<class R, class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8> _mfi::BOOST_MEM_FN_NAME(mf8)<R, T, A1, A2, A3, A4, A5, A6, A7, A8> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5, A6, A7, A8) BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(mf8)<R, T, A1, A2, A3, A4, A5, A6, A7, A8>(f);
 }
 
-template<class R, class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8> _mfi::BOOST_MEM_FN_NAME(cmf8)<R, T, A1, A2, A3, A4, A5, A6, A7, A8> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5, A6, A7, A8) const)
+template<class R, class T, class A1, class A2, class A3, class A4, class A5, class A6, class A7, class A8> _mfi::BOOST_MEM_FN_NAME(cmf8)<R, T, A1, A2, A3, A4, A5, A6, A7, A8> mem_fn(R (BOOST_MEM_FN_CC T::*f) (A1, A2, A3, A4, A5, A6, A7, A8) const BOOST_MEM_FN_NOEXCEPT)
 {
     return _mfi::BOOST_MEM_FN_NAME(cmf8)<R, T, A1, A2, A3, A4, A5, A6, A7, A8>(f);
 }

include/boost/bind/placeholders.hpp

@@ -29,7 +29,7 @@ namespace boost
 namespace placeholders
 {
 
-#if defined(__BORLANDC__) || defined(__GNUC__) && (__GNUC__ < 4)
+#if defined(BOOST_BORLANDC) || defined(__GNUC__) && (__GNUC__ < 4)
 
 inline boost::arg<1> _1() { return boost::arg<1>(); }
 inline boost::arg<2> _2() { return boost::arg<2>(); }
@@ -41,6 +41,18 @@ inline boost::arg<7> _7() { return boost::arg<7>(); }
 inline boost::arg<8> _8() { return boost::arg<8>(); }
 inline boost::arg<9> _9() { return boost::arg<9>(); }
 
+#elif !defined(BOOST_NO_CXX17_INLINE_VARIABLES)
+
+BOOST_INLINE_CONSTEXPR boost::arg<1> _1;
+BOOST_INLINE_CONSTEXPR boost::arg<2> _2;
+BOOST_INLINE_CONSTEXPR boost::arg<3> _3;
+BOOST_INLINE_CONSTEXPR boost::arg<4> _4;
+BOOST_INLINE_CONSTEXPR boost::arg<5> _5;
+BOOST_INLINE_CONSTEXPR boost::arg<6> _6;
+BOOST_INLINE_CONSTEXPR boost::arg<7> _7;
+BOOST_INLINE_CONSTEXPR boost::arg<8> _8;
+BOOST_INLINE_CONSTEXPR boost::arg<9> _9;
+
 #else
 
 BOOST_STATIC_CONSTEXPR boost::arg<1> _1;

include/boost/bind/protect.hpp

@@ -2,10 +2,10 @@
 #define BOOST_BIND_PROTECT_HPP_INCLUDED
 
 //
-//  protect.hpp
+// protect.hpp
 //
-//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
-//  Copyright (c) 2009 Steven Watanabe
+// Copyright 2002, 2020 Peter Dimov
+// Copyright 2009 Steven Watanabe
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -13,7 +13,8 @@
 //
 
 #include <boost/config.hpp>
-#include <boost/detail/workaround.hpp>
+#include <boost/config/workaround.hpp>
+#include <utility>
 
 namespace boost
 {
@@ -21,8 +22,53 @@ namespace boost
 namespace _bi
 {
 
+#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_NO_CXX11_DECLTYPE)
+
+template<class T> struct protect_make_void
+{
+    typedef void type;
+};
+
+template<class F, class E = void> struct protect_result_type
+{
+};
+
+template<class F> struct protect_result_type< F, typename protect_make_void<typename F::result_type>::type >
+{
+    typedef typename F::result_type result_type;
+};
+
+template<class F> class protected_bind_t: public protect_result_type<F>
+{
+private:
+
+    F f_;
+
+public:
+
+    explicit protected_bind_t( F f ): f_( f )
+    {
+    }
+
+    template<class... A> auto operator()( A&&... a ) -> decltype( f_( std::forward<A>(a)... ) )
+    {
+        return f_( std::forward<A>(a)... );
+    }
+
+    template<class... A> auto operator()( A&&... a ) const -> decltype( f_( std::forward<A>(a)... ) )
+    {
+        return f_( std::forward<A>(a)... );
+    }
+};
+
+#else
+
 template<class F> class protected_bind_t
 {
+private:
+
+    F f_;
+
 public:
 
     typedef typename F::result_type result_type;
@@ -286,12 +332,10 @@ public:
     }
 
 #endif
-
-private:
-
-    F f_;
 };
 
+#endif
+
 } // namespace _bi
 
 template<class F> _bi::protected_bind_t<F> protect(F f)

include/boost/bind/storage.hpp

@@ -49,7 +49,7 @@ template<class A1> struct storage1
     A1 a1_;
 };
 
-#if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION ) && !defined( __BORLANDC__ )
+#if !defined( BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION ) && !defined( BOOST_BORLANDC )
 
 template<int I> struct storage1< boost::arg<I> >
 {

test/Jamfile.v2

@@ -73,3 +73,7 @@ run mem_fn_stdcall_test.cpp ;
 run bind_noexcept_test.cpp ;
 run bind_noexcept_mf_test.cpp ;
 run global_placeholders.cpp ;
+run mem_fn_noexcept_test.cpp ;
+run bind_cpp20_test.cpp ;
+run protect_test2.cpp ;
+run protect_cpp20_test.cpp ;

test/bind_cpp20_test.cpp

@@ -0,0 +1,42 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/bind/bind.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+#include <boost/config/workaround.hpp>
+#include <functional>
+
+//
+
+int main()
+{
+    BOOST_TEST_EQ( boost::bind( std::plus<int>(), 1, 2 )(), 3 );
+    BOOST_TEST_EQ( boost::bind( std::minus<int>(), 1, 2 )(), -1 );
+    BOOST_TEST_EQ( boost::bind( std::multiplies<int>(), 1, 2 )(), 2 );
+    BOOST_TEST_EQ( boost::bind( std::divides<int>(), 1, 2 )(), 0 );
+    BOOST_TEST_EQ( boost::bind( std::modulus<int>(), 1, 2 )(), 1 );
+    BOOST_TEST_EQ( boost::bind( std::negate<int>(), 1 )(), -1 );
+
+    BOOST_TEST_EQ( boost::bind( std::equal_to<int>(), 1, 2 )(), false );
+    BOOST_TEST_EQ( boost::bind( std::not_equal_to<int>(), 1, 2 )(), true );
+    BOOST_TEST_EQ( boost::bind( std::greater<int>(), 1, 2 )(), false );
+    BOOST_TEST_EQ( boost::bind( std::less<int>(), 1, 2 )(), true );
+    BOOST_TEST_EQ( boost::bind( std::greater_equal<int>(), 1, 2 )(), false );
+    BOOST_TEST_EQ( boost::bind( std::less_equal<int>(), 1, 2 )(), true );
+
+    BOOST_TEST_EQ( boost::bind( std::logical_and<int>(), 1, 2 )(), true );
+    BOOST_TEST_EQ( boost::bind( std::logical_or<int>(), 1, 2 )(), true );
+    BOOST_TEST_EQ( boost::bind( std::logical_not<int>(), 1 )(), false );
+
+#if !BOOST_WORKAROUND(BOOST_MSVC, < 1600)
+
+    BOOST_TEST_EQ( boost::bind( std::bit_and<int>(), 1, 2 )(), 0 );
+    BOOST_TEST_EQ( boost::bind( std::bit_or<int>(), 1, 2 )(), 3 );
+    BOOST_TEST_EQ( boost::bind( std::bit_xor<int>(), 1, 2 )(), 3 );
+
+#endif
+
+    return boost::report_errors();
+}

test/mem_fn_noexcept_test.cpp

@@ -0,0 +1,169 @@
+// Copyright 2001, 2002, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/mem_fn.hpp>
+#include <boost/shared_ptr.hpp>
+#include <iostream>
+
+#if defined(BOOST_NO_CXX11_NOEXCEPT)
+
+int main()
+{
+}
+
+#else
+
+struct X
+{
+    mutable unsigned int hash;
+
+    X(): hash(0) {}
+
+    int f0() noexcept { f1(17); return 0; }
+    int g0() const noexcept { g1(17); return 0; }
+
+    int f1(int a1) noexcept { hash = (hash * 17041 + a1) % 32768; return 0; }
+    int g1(int a1) const noexcept { hash = (hash * 17041 + a1 * 2) % 32768; return 0; }
+
+    int f2(int a1, int a2) noexcept { f1(a1); f1(a2); return 0; }
+    int g2(int a1, int a2) const noexcept { g1(a1); g1(a2); return 0; }
+
+    int f3(int a1, int a2, int a3) noexcept { f2(a1, a2); f1(a3); return 0; }
+    int g3(int a1, int a2, int a3) const noexcept { g2(a1, a2); g1(a3); return 0; }
+
+    int f4(int a1, int a2, int a3, int a4) noexcept { f3(a1, a2, a3); f1(a4); return 0; }
+    int g4(int a1, int a2, int a3, int a4) const noexcept { g3(a1, a2, a3); g1(a4); return 0; }
+
+    int f5(int a1, int a2, int a3, int a4, int a5) noexcept { f4(a1, a2, a3, a4); f1(a5); return 0; }
+    int g5(int a1, int a2, int a3, int a4, int a5) const noexcept { g4(a1, a2, a3, a4); g1(a5); return 0; }
+
+    int f6(int a1, int a2, int a3, int a4, int a5, int a6) noexcept { f5(a1, a2, a3, a4, a5); f1(a6); return 0; }
+    int g6(int a1, int a2, int a3, int a4, int a5, int a6) const noexcept { g5(a1, a2, a3, a4, a5); g1(a6); return 0; }
+
+    int f7(int a1, int a2, int a3, int a4, int a5, int a6, int a7) noexcept { f6(a1, a2, a3, a4, a5, a6); f1(a7); return 0; }
+    int g7(int a1, int a2, int a3, int a4, int a5, int a6, int a7) const noexcept { g6(a1, a2, a3, a4, a5, a6); g1(a7); return 0; }
+
+    int f8(int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8) noexcept { f7(a1, a2, a3, a4, a5, a6, a7); f1(a8); return 0; }
+    int g8(int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8) const noexcept { g7(a1, a2, a3, a4, a5, a6, a7); g1(a8); return 0; }
+};
+
+int detect_errors(bool x)
+{
+    if(x)
+    {
+        std::cerr << "no errors detected.\n";
+        return 0;
+    }
+    else
+    {
+        std::cerr << "test failed.\n";
+        return 1;
+    }
+}
+
+int main()
+{
+    using boost::mem_fn;
+
+    X x;
+
+    X const & rcx = x;
+    X const * pcx = &x;
+
+    boost::shared_ptr<X> sp(new X);
+
+    mem_fn(&X::f0)(x);
+    mem_fn(&X::f0)(&x);
+    mem_fn(&X::f0)(sp);
+
+    mem_fn(&X::g0)(x);
+    mem_fn(&X::g0)(rcx);
+    mem_fn(&X::g0)(&x);
+    mem_fn(&X::g0)(pcx);
+    mem_fn(&X::g0)(sp);
+
+    mem_fn(&X::f1)(x, 1);
+    mem_fn(&X::f1)(&x, 1);
+    mem_fn(&X::f1)(sp, 1);
+
+    mem_fn(&X::g1)(x, 1);
+    mem_fn(&X::g1)(rcx, 1);
+    mem_fn(&X::g1)(&x, 1);
+    mem_fn(&X::g1)(pcx, 1);
+    mem_fn(&X::g1)(sp, 1);
+
+    mem_fn(&X::f2)(x, 1, 2);
+    mem_fn(&X::f2)(&x, 1, 2);
+    mem_fn(&X::f2)(sp, 1, 2);
+
+    mem_fn(&X::g2)(x, 1, 2);
+    mem_fn(&X::g2)(rcx, 1, 2);
+    mem_fn(&X::g2)(&x, 1, 2);
+    mem_fn(&X::g2)(pcx, 1, 2);
+    mem_fn(&X::g2)(sp, 1, 2);
+
+    mem_fn(&X::f3)(x, 1, 2, 3);
+    mem_fn(&X::f3)(&x, 1, 2, 3);
+    mem_fn(&X::f3)(sp, 1, 2, 3);
+
+    mem_fn(&X::g3)(x, 1, 2, 3);
+    mem_fn(&X::g3)(rcx, 1, 2, 3);
+    mem_fn(&X::g3)(&x, 1, 2, 3);
+    mem_fn(&X::g3)(pcx, 1, 2, 3);
+    mem_fn(&X::g3)(sp, 1, 2, 3);
+
+    mem_fn(&X::f4)(x, 1, 2, 3, 4);
+    mem_fn(&X::f4)(&x, 1, 2, 3, 4);
+    mem_fn(&X::f4)(sp, 1, 2, 3, 4);
+
+    mem_fn(&X::g4)(x, 1, 2, 3, 4);
+    mem_fn(&X::g4)(rcx, 1, 2, 3, 4);
+    mem_fn(&X::g4)(&x, 1, 2, 3, 4);
+    mem_fn(&X::g4)(pcx, 1, 2, 3, 4);
+    mem_fn(&X::g4)(sp, 1, 2, 3, 4);
+
+    mem_fn(&X::f5)(x, 1, 2, 3, 4, 5);
+    mem_fn(&X::f5)(&x, 1, 2, 3, 4, 5);
+    mem_fn(&X::f5)(sp, 1, 2, 3, 4, 5);
+
+    mem_fn(&X::g5)(x, 1, 2, 3, 4, 5);
+    mem_fn(&X::g5)(rcx, 1, 2, 3, 4, 5);
+    mem_fn(&X::g5)(&x, 1, 2, 3, 4, 5);
+    mem_fn(&X::g5)(pcx, 1, 2, 3, 4, 5);
+    mem_fn(&X::g5)(sp, 1, 2, 3, 4, 5);
+
+    mem_fn(&X::f6)(x, 1, 2, 3, 4, 5, 6);
+    mem_fn(&X::f6)(&x, 1, 2, 3, 4, 5, 6);
+    mem_fn(&X::f6)(sp, 1, 2, 3, 4, 5, 6);
+
+    mem_fn(&X::g6)(x, 1, 2, 3, 4, 5, 6);
+    mem_fn(&X::g6)(rcx, 1, 2, 3, 4, 5, 6);
+    mem_fn(&X::g6)(&x, 1, 2, 3, 4, 5, 6);
+    mem_fn(&X::g6)(pcx, 1, 2, 3, 4, 5, 6);
+    mem_fn(&X::g6)(sp, 1, 2, 3, 4, 5, 6);
+
+    mem_fn(&X::f7)(x, 1, 2, 3, 4, 5, 6, 7);
+    mem_fn(&X::f7)(&x, 1, 2, 3, 4, 5, 6, 7);
+    mem_fn(&X::f7)(sp, 1, 2, 3, 4, 5, 6, 7);
+
+    mem_fn(&X::g7)(x, 1, 2, 3, 4, 5, 6, 7);
+    mem_fn(&X::g7)(rcx, 1, 2, 3, 4, 5, 6, 7);
+    mem_fn(&X::g7)(&x, 1, 2, 3, 4, 5, 6, 7);
+    mem_fn(&X::g7)(pcx, 1, 2, 3, 4, 5, 6, 7);
+    mem_fn(&X::g7)(sp, 1, 2, 3, 4, 5, 6, 7);
+
+    mem_fn(&X::f8)(x, 1, 2, 3, 4, 5, 6, 7, 8);
+    mem_fn(&X::f8)(&x, 1, 2, 3, 4, 5, 6, 7, 8);
+    mem_fn(&X::f8)(sp, 1, 2, 3, 4, 5, 6, 7, 8);
+
+    mem_fn(&X::g8)(x, 1, 2, 3, 4, 5, 6, 7, 8);
+    mem_fn(&X::g8)(rcx, 1, 2, 3, 4, 5, 6, 7, 8);
+    mem_fn(&X::g8)(&x, 1, 2, 3, 4, 5, 6, 7, 8);
+    mem_fn(&X::g8)(pcx, 1, 2, 3, 4, 5, 6, 7, 8);
+    mem_fn(&X::g8)(sp, 1, 2, 3, 4, 5, 6, 7, 8);
+
+    return detect_errors(mem_fn(&X::hash)(x) == 17610 && mem_fn(&X::hash)(sp) == 2155);
+}
+
+#endif

test/mem_fn_unary_addr_test.cpp

@@ -83,7 +83,7 @@ public:
     }
 };
 
-#if defined( __BORLANDC__ ) && BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT( 0x620 ) )
+#if defined( BOOST_BORLANDC ) && BOOST_WORKAROUND( BOOST_BORLANDC, BOOST_TESTED_AT( 0x620 ) )
 namespace boost
 {
 #endif
@@ -93,7 +93,7 @@ template<class T> T * get_pointer( Y< T > const & y )
     return y.get();
 }
 
-#if defined( __BORLANDC__ ) && BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT( 0x620 ) )
+#if defined( BOOST_BORLANDC ) && BOOST_WORKAROUND( BOOST_BORLANDC, BOOST_TESTED_AT( 0x620 ) )
 } // namespace boost
 #endif
 

test/protect_cpp20_test.cpp

@@ -0,0 +1,42 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/bind/protect.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+#include <boost/config/workaround.hpp>
+#include <functional>
+
+//
+
+int main()
+{
+    BOOST_TEST_EQ( boost::protect( std::plus<int>() )( 1, 2 ), 3 );
+    BOOST_TEST_EQ( boost::protect( std::minus<int>() )( 1, 2 ), -1 );
+    BOOST_TEST_EQ( boost::protect( std::multiplies<int>() )( 1, 2 ), 2 );
+    BOOST_TEST_EQ( boost::protect( std::divides<int>() )( 1, 2 ), 0 );
+    BOOST_TEST_EQ( boost::protect( std::modulus<int>() )( 1, 2 ), 1 );
+    BOOST_TEST_EQ( boost::protect( std::negate<int>() )( 1 ), -1 );
+
+    BOOST_TEST_EQ( boost::protect( std::equal_to<int>() )( 1, 2 ), false );
+    BOOST_TEST_EQ( boost::protect( std::not_equal_to<int>() )( 1, 2 ), true );
+    BOOST_TEST_EQ( boost::protect( std::greater<int>() )( 1, 2 ), false );
+    BOOST_TEST_EQ( boost::protect( std::less<int>() )( 1, 2 ), true );
+    BOOST_TEST_EQ( boost::protect( std::greater_equal<int>() )( 1, 2 ), false );
+    BOOST_TEST_EQ( boost::protect( std::less_equal<int>() )( 1, 2 ), true );
+
+    BOOST_TEST_EQ( boost::protect( std::logical_and<int>() )( 1, 2 ), true );
+    BOOST_TEST_EQ( boost::protect( std::logical_or<int>() )( 1, 2 ), true );
+    BOOST_TEST_EQ( boost::protect( std::logical_not<int>() )( 1 ), false );
+
+#if !BOOST_WORKAROUND(BOOST_MSVC, < 1600)
+
+    BOOST_TEST_EQ( boost::protect( std::bit_and<int>() )( 1, 2 ), 0 );
+    BOOST_TEST_EQ( boost::protect( std::bit_or<int>() )( 1, 2 ), 3 );
+    BOOST_TEST_EQ( boost::protect( std::bit_xor<int>() )( 1, 2 ), 3 );
+
+#endif
+
+    return boost::report_errors();
+}

test/protect_test2.cpp

@@ -0,0 +1,46 @@
+// protect_test2.cpp
+//
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/bind/protect.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <boost/core/is_same.hpp>
+
+template<class T, class F> void test( F )
+{
+    BOOST_TEST_TRAIT_TRUE((boost::core::is_same<typename T::result_type, typename F::result_type>));
+}
+
+struct X
+{
+    struct result_type {};
+};
+
+struct Y
+{
+};
+
+template<class T, class U> struct inherit: T, U
+{
+};
+
+template<class F> void test2( F )
+{
+    // test that F doesn't have ::result_type
+    BOOST_TEST_TRAIT_TRUE((boost::core::is_same<typename inherit<F, X>::result_type, typename X::result_type>));
+}
+
+int main()
+{
+    test<X>( boost::protect( X() ) );
+
+#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_NO_CXX11_DECLTYPE)
+
+    test2( boost::protect( Y() ) );
+
+#endif
+
+    return boost::report_errors();
+}