Fix dllexport mismatch errors under clang++

Make error_code and error_condition constexpr, as proposed in https://cplusplus.github.io/LWG/issue2992

.travis.yml

@@ -0,0 +1,296 @@
+# Copyright 2016, 2017, 2018 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)
+
+language: cpp
+
+sudo: false
+
+python: "2.7"
+
+branches:
+  only:
+    - master
+    - develop
+    - /feature\/.*/
+
+env:
+  matrix:
+    - BOGUS_JOB=true
+
+matrix:
+
+  exclude:
+    - env: BOGUS_JOB=true
+
+  include:
+    - os: linux
+      compiler: g++
+      env: TOOLSET=gcc COMPILER=g++ CXXSTD=03,11
+
+    - os: linux
+      compiler: g++-4.4
+      env: TOOLSET=gcc COMPILER=g++-4.4 CXXSTD=98,0x
+      addons:
+        apt:
+          packages:
+            - g++-4.4
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-4.6
+      env: TOOLSET=gcc COMPILER=g++-4.6 CXXSTD=03,0x
+      addons:
+        apt:
+          packages:
+            - g++-4.6
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-4.7
+      env: TOOLSET=gcc COMPILER=g++-4.7 CXXSTD=03,11
+      addons:
+        apt:
+          packages:
+            - g++-4.7
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-4.8
+      env: TOOLSET=gcc COMPILER=g++-4.8 CXXSTD=03,11
+      addons:
+        apt:
+          packages:
+            - g++-4.8
+          sources:
+            - ubuntu-toolchain-r-test
+    - os: linux
+      compiler: g++-4.9
+      env: TOOLSET=gcc COMPILER=g++-4.9 CXXSTD=03,11
+      addons:
+        apt:
+          packages:
+            - g++-4.9
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-5
+      env: TOOLSET=gcc COMPILER=g++-5 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - g++-5
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-6
+      env: TOOLSET=gcc COMPILER=g++-6 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - g++-6
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-7
+      env: TOOLSET=gcc COMPILER=g++-7 CXXSTD=03,11,14,17
+      addons:
+        apt:
+          packages:
+            - g++-7
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-7
+      env: UBSAN=1 TOOLSET=gcc COMPILER=g++-7 CXXSTD=03,11,14,17 UBSAN_OPTIONS=print_stacktrace=1 LINKFLAGS=-fuse-ld=gold
+      addons:
+        apt:
+          packages:
+            - g++-7
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: g++-8
+      env: TOOLSET=gcc COMPILER=g++-8 CXXSTD=03,11,14,17
+      addons:
+        apt:
+          packages:
+            - g++-8
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      compiler: clang++
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11
+
+    - os: linux
+      compiler: /usr/bin/clang++
+      env: TOOLSET=clang COMPILER=/usr/bin/clang++ CXXSTD=03,11
+      addons:
+        apt:
+          packages:
+            - clang-3.3
+
+    - os: linux
+      compiler: /usr/bin/clang++
+      env: TOOLSET=clang COMPILER=/usr/bin/clang++ CXXSTD=03,11
+      addons:
+        apt:
+          packages:
+            - clang-3.4
+
+    - os: linux
+      compiler: clang++-3.5
+      env: TOOLSET=clang COMPILER=clang++-3.5 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-3.5
+            - libstdc++-4.9-dev
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-precise-3.5
+
+    - os: linux
+      compiler: clang++-3.6
+      env: TOOLSET=clang COMPILER=clang++-3.6 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-3.6
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-precise-3.6
+
+    - os: linux
+      compiler: clang++-3.7
+      env: TOOLSET=clang COMPILER=clang++-3.7 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-3.7
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-precise-3.7
+
+    - os: linux
+      compiler: clang++-3.8
+      env: TOOLSET=clang COMPILER=clang++-3.8 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-3.8
+            - libstdc++-4.9-dev
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-precise-3.8
+
+    - os: linux
+      compiler: clang++-3.9
+      env: TOOLSET=clang COMPILER=clang++-3.9 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-3.9
+            - libstdc++-4.9-dev
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-precise-3.9
+
+    - os: linux
+      compiler: clang++-4.0
+      env: TOOLSET=clang COMPILER=clang++-4.0 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-4.0
+            - libstdc++-4.9-dev
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-trusty-4.0
+
+    - os: linux
+      compiler: clang++-5.0
+      env: TOOLSET=clang COMPILER=clang++-5.0 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-5.0
+            - libstdc++-4.9-dev
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-trusty-5.0
+
+    - os: linux
+      compiler: clang++-5.0
+      env: UBSAN=1 TOOLSET=clang COMPILER=clang++-5.0 CXXSTD=03,11,14,1z UBSAN_OPTIONS=print_stacktrace=1
+      addons:
+        apt:
+          packages:
+            - clang-5.0
+            - libstdc++-4.9-dev
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-trusty-5.0
+
+    - os: linux
+      compiler: clang++-6.0
+      env: TOOLSET=clang COMPILER=clang++-6.0 CXXSTD=03,11,14,17
+      addons:
+        apt:
+          packages:
+            - clang-6.0
+            - libstdc++-4.9-dev
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-trusty-6.0
+
+    - os: linux
+      compiler: clang++-libc++
+      env: TOOLSET=clang COMPILER=clang++-libc++ CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - libc++-dev
+
+    - os: linux
+      compiler: clang++-libc++
+      env: UBSAN=1 TOOLSET=clang COMPILER=clang++-libc++ CXXSTD=03,11,14,1z UBSAN_OPTIONS=print_stacktrace=1
+      addons:
+        apt:
+          packages:
+            - libc++-dev
+
+    - os: osx
+      compiler: clang++
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
+
+install:
+  - BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
+  - cd ..
+  - git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
+  - cd boost-root
+  - git submodule update --init tools/build
+  - git submodule update --init libs/config
+  - git submodule update --init tools/boostdep
+  - cp -r $TRAVIS_BUILD_DIR/* libs/system
+  - python tools/boostdep/depinst/depinst.py system
+  - ./bootstrap.sh
+  - ./b2 headers
+
+script:
+  - |-
+    echo "using $TOOLSET : : $COMPILER ;" > ~/user-config.jam
+  - ./b2 -j3 libs/system/test toolset=$TOOLSET cxxstd=$CXXSTD variant=debug,release ${UBSAN:+cxxflags=-fsanitize=undefined cxxflags=-fno-sanitize-recover=undefined linkflags=-fsanitize=undefined define=UBSAN=1 debug-symbols=on} ${LINKFLAGS:+linkflags=$LINKFLAGS}
+
+notifications:
+  email:
+    on_success: always

appveyor.yml

@@ -0,0 +1,80 @@
+# Copyright 2016, 2017 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)
+
+version: 1.0.{build}-{branch}
+
+shallow_clone: true
+
+branches:
+  only:
+    - master
+    - develop
+    - /feature\/.*/
+
+environment:
+  matrix:
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      TOOLSET: msvc-9.0
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      TOOLSET: msvc-10.0
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      TOOLSET: msvc-11.0
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      TOOLSET: msvc-12.0
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-14.0
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: msvc-14.1
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: msvc-14.1
+      CXXSTD: 17
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      ADDPATH: C:\cygwin\bin;
+      TOOLSET: gcc
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      ADDPATH: C:\cygwin\bin;
+      TOOLSET: gcc
+      CXXSTD: 03,11
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      ADDPATH: C:\cygwin64\bin;
+      TOOLSET: gcc
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      ADDPATH: C:\cygwin64\bin;
+      TOOLSET: gcc
+      CXXSTD: 03,11
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      ADDPATH: C:\mingw\bin;
+      TOOLSET: gcc
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      ADDPATH: C:\mingw\bin;
+      TOOLSET: gcc
+      CXXSTD: 03,11
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      ADDPATH: C:\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev1\mingw64\bin;
+      TOOLSET: gcc
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      ADDPATH: C:\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev1\mingw64\bin;
+      TOOLSET: gcc
+      CXXSTD: 03,11
+
+install:
+  - set BOOST_BRANCH=develop
+  - if "%APPVEYOR_REPO_BRANCH%" == "master" set BOOST_BRANCH=master
+  - cd ..
+  - git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
+  - cd boost-root
+  - git submodule update --init tools/build
+  - git submodule update --init libs/config
+  - git submodule update --init tools/boostdep
+  - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\system
+  - python tools/boostdep/depinst/depinst.py system
+  - cmd /c bootstrap
+  - b2 -d0 headers
+
+build: off
+
+test_script:
+  - PATH=%ADDPATH%%PATH%
+  - if not "%CXXSTD%" == "" set CXXSTD=cxxstd=%CXXSTD%
+  - b2 -j3 libs/system/test toolset=%TOOLSET% variant=debug,release %CXXSTD%

doc/reference.html

@@ -60,8 +60,7 @@
       &nbsp;&nbsp;&nbsp;<a href="#Class-error_condition-constructors">Class <code>error_condition</code> constructors</a><br>
       &nbsp;&nbsp;&nbsp;<a href="#Class-error_condition-modifiers">Class <code>error_condition</code> modifiers</a><br>
       &nbsp;&nbsp;&nbsp;<a href="#Class-error_condition-observers">Class <code>error_condition</code> observers</a><br>
-      <a href="#throws-object"><code>throws</code> object</a><br>
-      <a href="#Semantics-of-throws">Semantics of <code>throws</code> object</a><br>
+      <a href="#Function-boost-throws">Function <code>boost::throws()</code></a><br>
       <a href="#Non-member-functions">Non-member functions</a><br>
       <a href="#Header-system_error">Header &lt;boost/system/system_error.hpp&gt;</a><br>
       &nbsp;&nbsp;&nbsp;<a href="#Class-system_error">Class <code>system_error</code></a><br>
@@ -81,7 +80,7 @@ noexcept</code> and explicit conversion operators. The actual implementation
 uses C++11 features only when they are available, and otherwise falls back on 
 C++03 features.</p>
 <h2><a name="Macros">Macros</a></h2>
-<p>Users may defined the following macros if desired. Sensible defaults are 
+<p>Users may define the following macros if desired. Sensible defaults are
 provided, so users may ignore these macros if they prefer.</p>
 <table border="1" cellpadding="5" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" height="368">
   <tr>
@@ -110,17 +109,16 @@ provided, so users may ignore these macros if they prefer.</p>
     facility.</td>
   </tr>
   <tr>
-    <td valign="top" height="32"><code>BOOST_SYSTEM_NO_DEPRECATED</code></td>
+    <td valign="top" height="32"><code>BOOST_SYSTEM_ENABLE_DEPRECATED</code></td>
     <td valign="top" height="32">Not defined.</td>
-    <td valign="top" height="32">Deprecated features are excluded.</td>
+    <td valign="top" height="32">Deprecated features are provided for compatibility.</td>
   </tr>
   </table>
 <h2><a name="Deprecated-names">Deprecated names</a></h2>
-<p>In the process of adding Boost.System to C++0x standard library, the C++ 
-committee changed some  
-names. To ease transition, Boost.System deprecates the old 
-names, but continues to provide them unless macro <code>BOOST_SYSTEM_NO_DEPRECATED</code> 
-is defined.</p>
+<p>In the process of adding Boost.System to the C++11 standard library, the
+C++ committee changed some names. To ease transition, Boost.System deprecates
+the old names, but will provide them when the macro
+<code>BOOST_SYSTEM_ENABLE_DEPRECATED</code> is defined.</p>
 <table border="1" cellpadding="5" cellspacing="1" style="border-collapse: collapse" bordercolor="#111111">
   <tr>
     <td><b><i>Old usage, now deprecated</i></b></td>
@@ -316,8 +314,12 @@ fixed by globally adding () to these names to turn them into function calls.</p>
         operator&lt;&lt;( basic_ostream&lt;charT,traits&gt;&amp; os, const error_code &amp; ec );
 
     size_t hash_value( const error_code &amp; ec );
-  }
-}</pre>
+
+  } // namespace system
+
+  system::error_code &amp; throws();
+    
+} // namespace boost</pre>
 </blockquote>
 <p>The value of each<code> errc_t</code> constant shall be the same as the 
 value of the <code>&lt;cerrno&gt;</code> macro shown in the above synopsis.</p>
@@ -644,36 +646,6 @@ observers</a></h3>
   <code>int</code>) that can occur with <code>bool</code> are not allowed, 
   eliminating some sources of user error. One possible implementation choice for 
   this type is pointer to member. <i>--end note</i> <i>]</i></p>
-</blockquote>
-  <h2><a name="throws-object"><code>throws</code> object</a></h2>
-  <pre>extern error_code throws;</pre>
-<p>The predefined <code>error_code</code> object <code>throws</code> is supplied 
-for use as a &quot;throw on error&quot; tag.</p>
-<h2><a name="Semantics-of-throws">Semantics of <code>throws</code></a> object</h2>
-<p>Functions that specify an argument in the form <code>error_code&amp; ec=throws</code>, 
-with appropriate namespace qualifiers, have the following error handling 
-semantics:</p>
-<blockquote>
-  <p><i>Postconditions:</i></p>
-  <blockquote>
-    <p>If <code>&amp;ec != &amp;throws</code> and an error occurred:</p>
-    <ul>
-      <li> <code>ec.value()</code> returns the implementation specific error 
-      number for the particular error that occurred.</li>
-      <li><code>ec.category()</code> returns the <code>
-    <a href="#Class-error_category">error_category</a></code> for <code>ec.value()</code>.</li>
-    </ul>
-    <p>if <code>&amp;ec != &amp;throws</code> and an error did not occur, <code>ec.clear()</code>.</p>
-  </blockquote>
-  <p><i>Throws:</i></p>
-  <blockquote>
-  <p>If an error occurs and <code>&amp;ec == &amp;throws</code>, throws an exception of type
-  <code><a href="#Class-system_error">system_error</a></code> or of a type 
-  derived from <code><a href="#Class-system_error">system_error</a></code>. The 
-  exception's <code>code()</code> member function returns a reference to an
-  <code>error_code</code> object with the behavior specified in <i>
-  Postconditions</i>.</p>
-  </blockquote>
 </blockquote>
 <h2><a name="Non-member-functions">Non-member functions</a></h2>
   <pre>bool operator==( const error_code &amp; lhs, const error_code &amp; rhs ) noexcept;</pre>
@@ -736,6 +708,37 @@ bool operator!=( const error_condition &amp; condition, const error_code &amp; c
   <p><i>Returns: </i>&nbsp;A hash value representing <code>ec</code>.</p>
 </blockquote>
 
+<h2><a name="Function-boost-throws">Function <code>boost::throws()</code></a></h2>
+
+  <pre>system::error_code&amp; throws();</pre>
+<blockquote>
+<p><i>Returns:</i> A <code>system::error_code</code> reference 
+for use in some user-defined function signature as a &quot;throw on error&quot; tag.</p>
+<p><i>Remark:</i> The only valid use for the returned reference is to test its 
+address for equality or inequality to the address of the reference returned by 
+another call to throws(). The returned reference itself has been poisoned so 
+that an attempt to dereference it will fail.</p>
+<p>[<i>Example: </i>Example of a function that uses the <code>throws()</code> idiom:</p>
+  <blockquote>
+  <pre>int divide(int dividend, int divisor,
+           boost::system::error_code&amp; ec = boost::throws())
+{
+  if (divisor == 0)                             // is there an error?
+  {
+    if (&amp;ec == &amp;boost::throws())                // throw on error
+      throw &quot;oops!&quot;;                            // whatever exception you prefer
+    ec = error_code(EDOM, generic_category());  // report error via error_code
+    return 0;
+  }
+
+  if (&amp;ec != &amp;boost::throws())                  // error reporting via error_code
+    ec.clear();
+  return dividend / divisor;
+}</pre>
+  </blockquote>
+  <p>&mdash; <i>end Example</i>]</p>
+</blockquote>
+
 <h2><a name="Header-system_error">Header &lt;boost/system/system_error.hpp&gt;</a></h2>
 
 <h3><a name="Class-system_error">Class <code>
@@ -818,7 +821,7 @@ application program interfaces.</p>
 <hr>
 
 <p>Revised 
-<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%B %d, %Y" startspan -->January 06, 2014<!--webbot bot="Timestamp" endspan i-checksum="31400" --> </font>
+<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%B %d, %Y" startspan -->September 07, 2017<!--webbot bot="Timestamp" endspan i-checksum="38006" --> </font>
 </p>
 
 <p><EFBFBD> Copyright Beman Dawes, 2006, 2007, 2008, 2013</p>

include/boost/cerrno.hpp

@@ -7,8 +7,8 @@
 
 //  See library home page at http://www.boost.org/libs/system
 
-#ifndef BOOST_CERRNO_HPP
-#define BOOST_CERRNO_HPP
+#ifndef BOOST_SYSTEM_CERRNO_HPP
+#define BOOST_SYSTEM_CERRNO_HPP
 
 #include <cerrno>
 

include/boost/system/cygwin_error.hpp

@@ -7,8 +7,8 @@
 
 //  See library home page at http://www.boost.org/libs/system
 
-#ifndef BOOST_CYGWIN_ERROR_HPP
-#define BOOST_CYGWIN_ERROR_HPP
+#ifndef BOOST_SYSTEM_CYGWIN_ERROR_HPP
+#define BOOST_SYSTEM_CYGWIN_ERROR_HPP
 
 //  This header is effectively empty for compiles on operating systems where
 //  it is not applicable.
@@ -53,4 +53,4 @@ namespace boost
 
 #endif  // __CYGWIN__
 
-#endif  // BOOST_CYGWIN_ERROR_HPP
+#endif  // BOOST_SYSTEM_CYGWIN_ERROR_HPP

include/boost/system/detail/error_code.ipp

@@ -1,4 +1,4 @@
-//  error_code support implementation file  ----------------------------------//
+//  error_code support implementation file  --------------------------------------------//
 
 //  Copyright Beman Dawes 2002, 2006
 //  Copyright (c) Microsoft Corporation 2014
@@ -7,7 +7,7 @@
 
 //  See library home page at http://www.boost.org/libs/system
 
-//----------------------------------------------------------------------------//
+//--------------------------------------------------------------------------------------//
 
 #include <boost/config/warning_disable.hpp>
 
@@ -21,7 +21,9 @@
 #include <cstring> // for strerror/strerror_r
 
 # if defined( BOOST_WINDOWS_API )
-#   include <windows.h>
+#   include <boost/winapi/error_codes.hpp>
+#   include <boost/winapi/error_handling.hpp>
+#   include <boost/winapi/character_code_conversion.hpp>
 #   if !BOOST_PLAT_WINDOWS_RUNTIME
 #     include <boost/system/detail/local_free_on_destruction.hpp>
 #   endif
@@ -30,42 +32,25 @@
 #   endif
 # endif
 
-//----------------------------------------------------------------------------//
+//--------------------------------------------------------------------------------------//
 namespace boost
 {
-    namespace system
-    {
 
-namespace
+namespace system
 {
 
-  //  standard error categories  ---------------------------------------------//
+namespace detail
+{
 
-  class generic_error_category : public error_category
-  {
-  public:
-    generic_error_category(){}
-    const char *   name() const BOOST_SYSTEM_NOEXCEPT;
-    std::string    message( int ev ) const;
-  };
-
-  class system_error_category : public error_category
-  {
-  public:
-    system_error_category(){}
-    const char *        name() const BOOST_SYSTEM_NOEXCEPT;
-    std::string         message( int ev ) const;
-    error_condition     default_error_condition( int ev ) const BOOST_SYSTEM_NOEXCEPT;
-  };
+#ifdef BOOST_ERROR_CODE_HEADER_ONLY
+# define BOOST_SYSTEM_DECL_ inline
+#else
+# define BOOST_SYSTEM_DECL_ BOOST_SYSTEM_DECL
+#endif
 
   //  generic_error_category implementation  ---------------------------------//
 
-  const char * generic_error_category::name() const BOOST_SYSTEM_NOEXCEPT
-  {
-    return "generic";
-  }
-
-  std::string generic_error_category::message( int ev ) const
+  BOOST_SYSTEM_DECL_ std::string generic_error_category::message( int ev ) const
   {
     using namespace boost::system::errc;
 #if defined(__PGI)
@@ -84,7 +69,8 @@ namespace
   //   -- VMS doesn't provide strerror_r, but on this platform, strerror is
   //      thread safe.
   # if defined(BOOST_WINDOWS_API) || defined(__hpux) || defined(__sun)\
-     || (defined(__linux) && (!defined(__USE_XOPEN2K) || defined(BOOST_SYSTEM_USE_STRERROR)))\
+     || (defined(__linux) && (!defined(__USE_XOPEN2K)\
+     || defined(BOOST_SYSTEM_USE_STRERROR)))\
      || (defined(__osf__) && !defined(_REENTRANT))\
      || (defined(__INTEGRITY))\
      || (defined(__vms))\
@@ -151,19 +137,14 @@ namespace
 #   endif
 
       if ( sz > sizeof(buf) ) std::free( bp );
-      sz = 0;
       return msg;
   #  endif   // else POSIX version of strerror_r
   # endif  // else use strerror_r
   }
-  //  system_error_category implementation  --------------------------------//
+  //  system_error_category implementation  --------------------------------------------//
 
-  const char * system_error_category::name() const BOOST_SYSTEM_NOEXCEPT
-  {
-    return "system";
-  }
-
-  error_condition system_error_category::default_error_condition( int ev ) const BOOST_SYSTEM_NOEXCEPT
+  BOOST_SYSTEM_DECL_ error_condition system_error_category::default_error_condition( int ev ) const
+    BOOST_SYSTEM_NOEXCEPT
   {
     using namespace boost::system::errc;
 #if defined(__PGI)
@@ -179,13 +160,19 @@ namespace
       if ( HRESULT_FACILITY( ev ) == FACILITY_WIN32 )
         ev = HRESULT_CODE( ev );
 #   endif
+# endif
+
+# if defined(BOOST_WINDOWS_API)
+
+    using namespace boost::winapi; // for error codes
+
 # endif
 
     switch ( ev )
     {
     case 0: return make_error_condition( success );
 # if defined(BOOST_POSIX_API)
-    // POSIX-like O/S -> posix_errno decode table  ---------------------------//
+    // POSIX-like O/S -> posix_errno decode table  -------------------------------------//
     case E2BIG: return make_error_condition( argument_list_too_long );
     case EACCES: return make_error_condition( permission_denied );
     case EADDRINUSE: return make_error_condition( address_in_use );
@@ -279,80 +266,81 @@ namespace
   #else
     // Windows system -> posix_errno decode table  ---------------------------//
     // see WinError.h comments for descriptions of errors
-    case ERROR_ACCESS_DENIED: return make_error_condition( permission_denied );
-    case ERROR_ALREADY_EXISTS: return make_error_condition( file_exists );
-    case ERROR_BAD_UNIT: return make_error_condition( no_such_device );
-    case ERROR_BUFFER_OVERFLOW: return make_error_condition( filename_too_long );
-    case ERROR_BUSY: return make_error_condition( device_or_resource_busy );
-    case ERROR_BUSY_DRIVE: return make_error_condition( device_or_resource_busy );
-    case ERROR_CANNOT_MAKE: return make_error_condition( permission_denied );
-    case ERROR_CANTOPEN: return make_error_condition( io_error );
-    case ERROR_CANTREAD: return make_error_condition( io_error );
-    case ERROR_CANTWRITE: return make_error_condition( io_error );
-    case ERROR_CURRENT_DIRECTORY: return make_error_condition( permission_denied );
-    case ERROR_DEV_NOT_EXIST: return make_error_condition( no_such_device );
-    case ERROR_DEVICE_IN_USE: return make_error_condition( device_or_resource_busy );
-    case ERROR_DIR_NOT_EMPTY: return make_error_condition( directory_not_empty );
-    case ERROR_DIRECTORY: return make_error_condition( invalid_argument ); // WinError.h: "The directory name is invalid"
-    case ERROR_DISK_FULL: return make_error_condition( no_space_on_device );
-    case ERROR_FILE_EXISTS: return make_error_condition( file_exists );
-    case ERROR_FILE_NOT_FOUND: return make_error_condition( no_such_file_or_directory );
-    case ERROR_HANDLE_DISK_FULL: return make_error_condition( no_space_on_device );
-    case ERROR_INVALID_ACCESS: return make_error_condition( permission_denied );
-    case ERROR_INVALID_DRIVE: return make_error_condition( no_such_device );
-    case ERROR_INVALID_FUNCTION: return make_error_condition( function_not_supported );
-    case ERROR_INVALID_HANDLE: return make_error_condition( invalid_argument );
-    case ERROR_INVALID_NAME: return make_error_condition( invalid_argument );
-    case ERROR_LOCK_VIOLATION: return make_error_condition( no_lock_available );
-    case ERROR_LOCKED: return make_error_condition( no_lock_available );
-    case ERROR_NEGATIVE_SEEK: return make_error_condition( invalid_argument );
-    case ERROR_NOACCESS: return make_error_condition( permission_denied );
-    case ERROR_NOT_ENOUGH_MEMORY: return make_error_condition( not_enough_memory );
-    case ERROR_NOT_READY: return make_error_condition( resource_unavailable_try_again );
-    case ERROR_NOT_SAME_DEVICE: return make_error_condition( cross_device_link );
-    case ERROR_OPEN_FAILED: return make_error_condition( io_error );
-    case ERROR_OPEN_FILES: return make_error_condition( device_or_resource_busy );
-    case ERROR_OPERATION_ABORTED: return make_error_condition( operation_canceled );
-    case ERROR_OUTOFMEMORY: return make_error_condition( not_enough_memory );
-    case ERROR_PATH_NOT_FOUND: return make_error_condition( no_such_file_or_directory );
-    case ERROR_READ_FAULT: return make_error_condition( io_error );
-    case ERROR_RETRY: return make_error_condition( resource_unavailable_try_again );
-    case ERROR_SEEK: return make_error_condition( io_error );
-    case ERROR_SHARING_VIOLATION: return make_error_condition( permission_denied );
-    case ERROR_TOO_MANY_OPEN_FILES: return make_error_condition( too_many_files_open );
-    case ERROR_WRITE_FAULT: return make_error_condition( io_error );
-    case ERROR_WRITE_PROTECT: return make_error_condition( permission_denied );
-    case WSAEACCES: return make_error_condition( permission_denied );
-    case WSAEADDRINUSE: return make_error_condition( address_in_use );
-    case WSAEADDRNOTAVAIL: return make_error_condition( address_not_available );
-    case WSAEAFNOSUPPORT: return make_error_condition( address_family_not_supported );
-    case WSAEALREADY: return make_error_condition( connection_already_in_progress );
-    case WSAEBADF: return make_error_condition( bad_file_descriptor );
-    case WSAECONNABORTED: return make_error_condition( connection_aborted );
-    case WSAECONNREFUSED: return make_error_condition( connection_refused );
-    case WSAECONNRESET: return make_error_condition( connection_reset );
-    case WSAEDESTADDRREQ: return make_error_condition( destination_address_required );
-    case WSAEFAULT: return make_error_condition( bad_address );
-    case WSAEHOSTUNREACH: return make_error_condition( host_unreachable );
-    case WSAEINPROGRESS: return make_error_condition( operation_in_progress );
-    case WSAEINTR: return make_error_condition( interrupted );
-    case WSAEINVAL: return make_error_condition( invalid_argument );
-    case WSAEISCONN: return make_error_condition( already_connected );
-    case WSAEMFILE: return make_error_condition( too_many_files_open );
-    case WSAEMSGSIZE: return make_error_condition( message_size );
-    case WSAENAMETOOLONG: return make_error_condition( filename_too_long );
-    case WSAENETDOWN: return make_error_condition( network_down );
-    case WSAENETRESET: return make_error_condition( network_reset );
-    case WSAENETUNREACH: return make_error_condition( network_unreachable );
-    case WSAENOBUFS: return make_error_condition( no_buffer_space );
-    case WSAENOPROTOOPT: return make_error_condition( no_protocol_option );
-    case WSAENOTCONN: return make_error_condition( not_connected );
-    case WSAENOTSOCK: return make_error_condition( not_a_socket );
-    case WSAEOPNOTSUPP: return make_error_condition( operation_not_supported );
-    case WSAEPROTONOSUPPORT: return make_error_condition( protocol_not_supported );
-    case WSAEPROTOTYPE: return make_error_condition( wrong_protocol_type );
-    case WSAETIMEDOUT: return make_error_condition( timed_out );
-    case WSAEWOULDBLOCK: return make_error_condition( operation_would_block );
+    case ERROR_ACCESS_DENIED_: return make_error_condition( permission_denied );
+    case ERROR_ALREADY_EXISTS_: return make_error_condition( file_exists );
+    case ERROR_BAD_UNIT_: return make_error_condition( no_such_device );
+    case ERROR_BUFFER_OVERFLOW_: return make_error_condition( filename_too_long );
+    case ERROR_BUSY_: return make_error_condition( device_or_resource_busy );
+    case ERROR_BUSY_DRIVE_: return make_error_condition( device_or_resource_busy );
+    case ERROR_CANNOT_MAKE_: return make_error_condition( permission_denied );
+    case ERROR_CANTOPEN_: return make_error_condition( io_error );
+    case ERROR_CANTREAD_: return make_error_condition( io_error );
+    case ERROR_CANTWRITE_: return make_error_condition( io_error );
+    case ERROR_CURRENT_DIRECTORY_: return make_error_condition( permission_denied );
+    case ERROR_DEV_NOT_EXIST_: return make_error_condition( no_such_device );
+    case ERROR_DEVICE_IN_USE_: return make_error_condition( device_or_resource_busy );
+    case ERROR_DIR_NOT_EMPTY_: return make_error_condition( directory_not_empty );
+    case ERROR_DIRECTORY_: return make_error_condition( invalid_argument );\
+      // WinError.h: "The directory name is invalid"
+    case ERROR_DISK_FULL_: return make_error_condition( no_space_on_device );
+    case ERROR_FILE_EXISTS_: return make_error_condition( file_exists );
+    case ERROR_FILE_NOT_FOUND_: return make_error_condition( no_such_file_or_directory );
+    case ERROR_HANDLE_DISK_FULL_: return make_error_condition( no_space_on_device );
+    case ERROR_INVALID_ACCESS_: return make_error_condition( permission_denied );
+    case ERROR_INVALID_DRIVE_: return make_error_condition( no_such_device );
+    case ERROR_INVALID_FUNCTION_: return make_error_condition( function_not_supported );
+    case ERROR_INVALID_HANDLE_: return make_error_condition( invalid_argument );
+    case ERROR_INVALID_NAME_: return make_error_condition( invalid_argument );
+    case ERROR_LOCK_VIOLATION_: return make_error_condition( no_lock_available );
+    case ERROR_LOCKED_: return make_error_condition( no_lock_available );
+    case ERROR_NEGATIVE_SEEK_: return make_error_condition( invalid_argument );
+    case ERROR_NOACCESS_: return make_error_condition( permission_denied );
+    case ERROR_NOT_ENOUGH_MEMORY_: return make_error_condition( not_enough_memory );
+    case ERROR_NOT_READY_: return make_error_condition( resource_unavailable_try_again );
+    case ERROR_NOT_SAME_DEVICE_: return make_error_condition( cross_device_link );
+    case ERROR_OPEN_FAILED_: return make_error_condition( io_error );
+    case ERROR_OPEN_FILES_: return make_error_condition( device_or_resource_busy );
+    case ERROR_OPERATION_ABORTED_: return make_error_condition( operation_canceled );
+    case ERROR_OUTOFMEMORY_: return make_error_condition( not_enough_memory );
+    case ERROR_PATH_NOT_FOUND_: return make_error_condition( no_such_file_or_directory );
+    case ERROR_READ_FAULT_: return make_error_condition( io_error );
+    case ERROR_RETRY_: return make_error_condition( resource_unavailable_try_again );
+    case ERROR_SEEK_: return make_error_condition( io_error );
+    case ERROR_SHARING_VIOLATION_: return make_error_condition( permission_denied );
+    case ERROR_TOO_MANY_OPEN_FILES_: return make_error_condition( too_many_files_open );
+    case ERROR_WRITE_FAULT_: return make_error_condition( io_error );
+    case ERROR_WRITE_PROTECT_: return make_error_condition( permission_denied );
+    case WSAEACCES_: return make_error_condition( permission_denied );
+    case WSAEADDRINUSE_: return make_error_condition( address_in_use );
+    case WSAEADDRNOTAVAIL_: return make_error_condition( address_not_available );
+    case WSAEAFNOSUPPORT_: return make_error_condition( address_family_not_supported );
+    case WSAEALREADY_: return make_error_condition( connection_already_in_progress );
+    case WSAEBADF_: return make_error_condition( bad_file_descriptor );
+    case WSAECONNABORTED_: return make_error_condition( connection_aborted );
+    case WSAECONNREFUSED_: return make_error_condition( connection_refused );
+    case WSAECONNRESET_: return make_error_condition( connection_reset );
+    case WSAEDESTADDRREQ_: return make_error_condition( destination_address_required );
+    case WSAEFAULT_: return make_error_condition( bad_address );
+    case WSAEHOSTUNREACH_: return make_error_condition( host_unreachable );
+    case WSAEINPROGRESS_: return make_error_condition( operation_in_progress );
+    case WSAEINTR_: return make_error_condition( interrupted );
+    case WSAEINVAL_: return make_error_condition( invalid_argument );
+    case WSAEISCONN_: return make_error_condition( already_connected );
+    case WSAEMFILE_: return make_error_condition( too_many_files_open );
+    case WSAEMSGSIZE_: return make_error_condition( message_size );
+    case WSAENAMETOOLONG_: return make_error_condition( filename_too_long );
+    case WSAENETDOWN_: return make_error_condition( network_down );
+    case WSAENETRESET_: return make_error_condition( network_reset );
+    case WSAENETUNREACH_: return make_error_condition( network_unreachable );
+    case WSAENOBUFS_: return make_error_condition( no_buffer_space );
+    case WSAENOPROTOOPT_: return make_error_condition( no_protocol_option );
+    case WSAENOTCONN_: return make_error_condition( not_connected );
+    case WSAENOTSOCK_: return make_error_condition( not_a_socket );
+    case WSAEOPNOTSUPP_: return make_error_condition( operation_not_supported );
+    case WSAEPROTONOSUPPORT_: return make_error_condition( protocol_not_supported );
+    case WSAEPROTOTYPE_: return make_error_condition( wrong_protocol_type );
+    case WSAETIMEDOUT_: return make_error_condition( timed_out );
+    case WSAEWOULDBLOCK_: return make_error_condition( operation_would_block );
   #endif
     default: return error_condition( ev, system_category() );
     }
@@ -360,26 +348,27 @@ namespace
 
 # if !defined( BOOST_WINDOWS_API )
 
-  std::string system_error_category::message( int ev ) const
+  BOOST_SYSTEM_DECL_ std::string system_error_category::message( int ev ) const
   {
     return generic_category().message( ev );
   }
 # else
 
-  std::string system_error_category::message( int ev ) const
+  BOOST_SYSTEM_DECL_ std::string system_error_category::message( int ev ) const
   {
 #if defined(UNDER_CE) || BOOST_PLAT_WINDOWS_RUNTIME || defined(BOOST_NO_ANSI_APIS)
     std::wstring buf(128, wchar_t());
     for (;;)
     {
-        DWORD retval = ::FormatMessageW(
-            FORMAT_MESSAGE_FROM_SYSTEM |
-            FORMAT_MESSAGE_IGNORE_INSERTS,
+        boost::winapi::DWORD_ retval = boost::winapi::FormatMessageW(
+            boost::winapi::FORMAT_MESSAGE_FROM_SYSTEM_ |
+            boost::winapi::FORMAT_MESSAGE_IGNORE_INSERTS_,
             NULL,
             ev,
-            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
+            boost::winapi::MAKELANGID_(boost::winapi::LANG_NEUTRAL_,
+            boost::winapi::SUBLANG_DEFAULT_), // Default language
             &buf[0],
-            buf.size(),
+            static_cast<boost::winapi::DWORD_>(buf.size()),
             NULL
         );
         
@@ -388,7 +377,8 @@ namespace
             buf.resize(retval);
             break;
         }
-        else if ( ::GetLastError() != ERROR_INSUFFICIENT_BUFFER )
+        else if (boost::winapi::GetLastError() !=
+          boost::winapi::ERROR_INSUFFICIENT_BUFFER_)
         {
             return std::string("Unknown error");
         }
@@ -398,24 +388,33 @@ namespace
         }
     }
     
-    int num_chars = (buf.size() + 1) * 2;
-    LPSTR narrow_buffer = (LPSTR)_alloca( num_chars );
-    if (::WideCharToMultiByte(CP_ACP, 0, buf.c_str(), -1, narrow_buffer, num_chars, NULL, NULL) == 0)
+    int num_chars = static_cast<int>(buf.size() + 1) * 2;
+
+    boost::winapi::LPSTR_ narrow_buffer =
+#if defined(__GNUC__)
+      (boost::winapi::LPSTR_)__builtin_alloca(num_chars);
+#else
+      (boost::winapi::LPSTR_)_alloca(num_chars);
+#endif
+
+    if (boost::winapi::WideCharToMultiByte(boost::winapi::CP_ACP_, 0,
+      buf.c_str(), -1, narrow_buffer, num_chars, NULL, NULL) == 0)
     {
         return std::string("Unknown error");
     }
 
     std::string str( narrow_buffer );
 #else
-    LPVOID lpMsgBuf = 0;
-    DWORD retval = ::FormatMessageA(
-        FORMAT_MESSAGE_ALLOCATE_BUFFER |
-        FORMAT_MESSAGE_FROM_SYSTEM |
-        FORMAT_MESSAGE_IGNORE_INSERTS,
+    boost::winapi::LPVOID_ lpMsgBuf = 0;
+    boost::winapi::DWORD_ retval = boost::winapi::FormatMessageA(
+        boost::winapi::FORMAT_MESSAGE_ALLOCATE_BUFFER_ |
+        boost::winapi::FORMAT_MESSAGE_FROM_SYSTEM_ |
+        boost::winapi::FORMAT_MESSAGE_IGNORE_INSERTS_,
         NULL,
         ev,
-        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
-        (LPSTR) &lpMsgBuf,
+        boost::winapi::MAKELANGID_(boost::winapi::LANG_NEUTRAL_,
+        boost::winapi::SUBLANG_DEFAULT_), // Default language
+        (boost::winapi::LPSTR_) &lpMsgBuf,
         0,
         NULL
     );
@@ -423,7 +422,7 @@ namespace
     if (retval == 0)
         return std::string("Unknown error");
 
-    std::string str( static_cast<LPCSTR>(lpMsgBuf) );
+    std::string str(static_cast<boost::winapi::LPCSTR_>(lpMsgBuf));
 # endif
     while ( str.size()
       && (str[str.size()-1] == '\n' || str[str.size()-1] == '\r') )
@@ -434,10 +433,12 @@ namespace
   }
 # endif
 
-} // unnamed namespace
+#undef BOOST_SYSTEM_DECL_
+
+} // namespace detail
 
 
-# ifndef BOOST_SYSTEM_NO_DEPRECATED
+# ifdef BOOST_SYSTEM_ENABLE_DEPRECATED
     BOOST_SYSTEM_DECL error_code throws; // "throw on error" special error_code;
                                          //  note that it doesn't matter if this
                                          //  isn't initialized before use since
@@ -445,23 +446,51 @@ namespace
                                          //  address for comparison purposes
 # endif
 
-# ifdef BOOST_ERROR_CODE_HEADER_ONLY
-#   define BOOST_SYSTEM_LINKAGE inline
-# else
-#   define BOOST_SYSTEM_LINKAGE BOOST_SYSTEM_DECL
-# endif
+#if defined(BOOST_ERROR_CODE_HEADER_ONLY)
 
-    BOOST_SYSTEM_LINKAGE const error_category & system_category() BOOST_SYSTEM_NOEXCEPT
-    {
-      static const system_error_category  system_category_const;
-      return system_category_const;
-    }
+// defined in error_code.hpp
 
-    BOOST_SYSTEM_LINKAGE const error_category & generic_category() BOOST_SYSTEM_NOEXCEPT
-    {
-      static const generic_error_category generic_category_const;
-      return generic_category_const;
-    }
+#elif defined(BOOST_SYSTEM_HAS_CONSTEXPR)
+
+namespace detail
+{
+
+BOOST_SYSTEM_REQUIRE_CONST_INIT BOOST_SYSTEM_DECL system_error_category system_category_instance;
+BOOST_SYSTEM_REQUIRE_CONST_INIT BOOST_SYSTEM_DECL generic_error_category generic_category_instance;
+
+BOOST_SYSTEM_DECL const error_category & system_category_ncx() BOOST_SYSTEM_NOEXCEPT
+{
+    return system_category_instance;
+}
+
+BOOST_SYSTEM_DECL const error_category & generic_category_ncx() BOOST_SYSTEM_NOEXCEPT
+{
+    return generic_category_instance;
+}
+
+} // namespace detail
+
+#else
+
+namespace detail
+{
+
+BOOST_SYSTEM_DECL const error_category & system_category_ncx() BOOST_SYSTEM_NOEXCEPT
+{
+    static const detail::system_error_category system_category_instance;
+    return system_category_instance;
+}
+
+BOOST_SYSTEM_DECL const error_category & generic_category_ncx() BOOST_SYSTEM_NOEXCEPT
+{
+    static const detail::generic_error_category generic_category_instance;
+    return generic_category_instance;
+}
+
+} // namespace detail
+
+#endif
+
+} // namespace system
 
-  } // namespace system
 } // namespace boost

include/boost/system/detail/local_free_on_destruction.hpp

@@ -12,6 +12,8 @@
 #ifndef BOOST_SYSTEM_LOCAL_FREE_ON_EXIT_HPP
 #define BOOST_SYSTEM_LOCAL_FREE_ON_EXIT_HPP
 
+#include <boost/winapi/local_memory.hpp>
+
 namespace boost {
 namespace system {
 namespace detail {
@@ -24,7 +26,7 @@ public:
 
   ~local_free_on_destruction()
   {
-    ::LocalFree(p_);
+    boost::winapi::LocalFree(p_);
   }
 
 private:

include/boost/system/error_code.hpp

@@ -1,15 +1,16 @@
-//  boost/system/error_code.hpp  ---------------------------------------------//
+//  boost/system/error_code.hpp  -------------------------------------------------------//
 
 //  Copyright Beman Dawes 2006, 2007
 //  Copyright Christoper Kohlhoff 2007
+//  Copyright Peter Dimov 2017, 2018
 
 //  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 library home page at http://www.boost.org/libs/system
 
-#ifndef BOOST_ERROR_CODE_HPP
-#define BOOST_ERROR_CODE_HPP
+#ifndef BOOST_SYSTEM_ERROR_CODE_HPP
+#define BOOST_SYSTEM_ERROR_CODE_HPP
 
 #include <boost/system/config.hpp>
 #include <boost/cstdint.hpp>
@@ -28,21 +29,41 @@
 #  error BOOST_POSIX_API or BOOST_WINDOWS_API must be defined
 #endif
 
+#ifndef BOOST_NO_CXX11_HDR_SYSTEM_ERROR
+#include <system_error>
+#endif
+
 #include <boost/config/abi_prefix.hpp> // must be the last #include
 
 #ifndef BOOST_SYSTEM_NOEXCEPT
 #define BOOST_SYSTEM_NOEXCEPT BOOST_NOEXCEPT
 #endif
 
+#if !defined(BOOST_NO_CXX14_CONSTEXPR)
+# define BOOST_SYSTEM_HAS_CONSTEXPR
+#endif
+
+#if defined(__GNUC__) && (__GNUC__ == 7 && __GNUC_MINOR__ < 4) && __cplusplus >= 201700L
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83835
+#  undef BOOST_SYSTEM_HAS_CONSTEXPR
+#endif
+
+#if defined(BOOST_SYSTEM_HAS_CONSTEXPR)
+# define BOOST_SYSTEM_CONSTEXPR constexpr
+#else
+# define BOOST_SYSTEM_CONSTEXPR
+#endif
+
 namespace boost
 {
   namespace system
   {
 
-    class error_code;
-    class error_condition;
+    class error_code;         // values defined by the operating system
+    class error_condition;    // portable generic values defined below, but ultimately
+                              // based on the POSIX standard
 
-    //  "Concept" helpers  ---------------------------------------------------//
+    //  "Concept" helpers  -------------------------------------------------------------//
 
     template< class T >
     struct is_error_code_enum { static const bool value = false; };
@@ -50,7 +71,7 @@ namespace boost
     template< class T >
     struct is_error_condition_enum { static const bool value = false; };
 
-    //  generic error_conditions  --------------------------------------------//
+    //  generic error_conditions  ------------------------------------------------------//
 
     namespace errc
     {
@@ -139,7 +160,7 @@ namespace boost
 
     } // namespace errc
 
-# ifndef BOOST_SYSTEM_NO_DEPRECATED
+# ifdef BOOST_SYSTEM_ENABLE_DEPRECATED
     namespace posix = errc;
     namespace posix_error = errc;
 # endif
@@ -148,9 +169,9 @@ namespace boost
       { static const bool value = true; };
 
 
-    //  ----------------------------------------------------------------------//
+    //  --------------------------------------------------------------------------------//
 
-    //  Operating system specific interfaces  --------------------------------//
+    //  Operating system specific interfaces  ------------------------------------------//
 
 
     //  The interface is divided into general and system-specific portions to
@@ -178,52 +199,311 @@ namespace boost
     //  These headers are effectively empty for compiles on operating systems
     //  where they are not applicable.
 
-    //  ----------------------------------------------------------------------//
+    //  --------------------------------------------------------------------------------//
+
+#ifdef BOOST_MSVC
+#pragma warning(push)
+// 'this' : used in base member initializer list
+#pragma warning(disable: 4355)
+#endif
 
     //  class error_category  ------------------------------------------------//
 
     class error_category : public noncopyable
     {
+#ifndef BOOST_NO_CXX11_HDR_SYSTEM_ERROR
+
+    private:
+
+      class std_category: public std::error_category
+      {
+      private:
+
+        boost::system::error_category const * pc_;
+
+      public:
+
+        BOOST_SYSTEM_CONSTEXPR explicit std_category( boost::system::error_category const * pc ): pc_( pc )
+        {
+        }
+
+        virtual const char * name() const BOOST_NOEXCEPT
+        {
+          return pc_->name();
+        }
+
+        virtual std::string message( int ev ) const
+        {
+          return pc_->message( ev );
+        }
+
+        virtual std::error_condition default_error_condition( int ev ) const
+          BOOST_NOEXCEPT;
+        virtual bool equivalent( int code, const std::error_condition & condition ) const
+          BOOST_NOEXCEPT;
+        virtual bool equivalent( const std::error_code & code, int condition ) const
+          BOOST_NOEXCEPT;
+      };
+
+      std_category std_cat_;
+
+    public:
+
+      BOOST_SYSTEM_CONSTEXPR error_category() BOOST_SYSTEM_NOEXCEPT: std_cat_( this ) {}
+
+      operator std::error_category const & () const BOOST_SYSTEM_NOEXCEPT
+      {
+        // do not map generic to std::generic on purpose; occasionally,
+        // there are two std::generic categories in a program, which leads
+        // to error codes/conditions mysteriously not being equal to themselves
+        return std_cat_;
+      }
+
+#else
+
+    // to maintain ABI compatibility between 03 and 11,
+    // define a class with the same layout
+
+    private:
+
+      class std_category
+      {
+      private:
+
+        boost::system::error_category const * pc_;
+
+      public:
+
+        BOOST_SYSTEM_CONSTEXPR explicit std_category( boost::system::error_category const * pc ): pc_( pc )
+        {
+        }
+
+        virtual ~std_category() {}
+
+        virtual const char * name() const BOOST_NOEXCEPT
+        {
+          return pc_->name();
+        }
+
+        // we can't define message, because (1) it returns an std::string,
+        // which can be different between 03 and 11, and (2) on mingw, there
+        // are actually two `message` functions, not one, so it doesn't work
+        // even if we do
+
+        // neither can we define default_error_condition or equivalent
+
+        // if these functions are called, it will crash, but that's still
+        // better than the alternative of having the class layout change
+      };
+
+      std_category std_cat_;
+
+    public:
+
+      BOOST_SYSTEM_CONSTEXPR error_category() BOOST_SYSTEM_NOEXCEPT: std_cat_( this ) {}
+
+#endif
+
     public:
       virtual ~error_category(){}
 
       virtual const char *     name() const BOOST_SYSTEM_NOEXCEPT = 0;
       virtual std::string      message( int ev ) const = 0;
-      inline virtual error_condition  default_error_condition( int ev ) const  BOOST_SYSTEM_NOEXCEPT;
+      inline virtual error_condition  default_error_condition( int ev ) const 
+        BOOST_SYSTEM_NOEXCEPT;
       inline virtual bool             equivalent( int code,
-                                           const error_condition & condition ) const  BOOST_SYSTEM_NOEXCEPT;
+                                           const error_condition & condition ) const 
+        BOOST_SYSTEM_NOEXCEPT;
       inline virtual bool             equivalent( const error_code & code,
                                            int condition ) const  BOOST_SYSTEM_NOEXCEPT;
-
-      bool operator==(const error_category & rhs) const BOOST_SYSTEM_NOEXCEPT { return this == &rhs; }
-      bool operator!=(const error_category & rhs) const BOOST_SYSTEM_NOEXCEPT { return this != &rhs; }
-      bool operator<( const error_category & rhs ) const BOOST_SYSTEM_NOEXCEPT
-      {
-        return std::less<const error_category*>()( this, &rhs );
-      }
     };
 
-    //  predefined error categories  -----------------------------------------//
+    BOOST_SYSTEM_CONSTEXPR inline bool operator==( const error_category & lhs,
+        const error_category & rhs ) BOOST_SYSTEM_NOEXCEPT
+        { return &lhs == &rhs; }
 
-# ifdef BOOST_ERROR_CODE_HEADER_ONLY
-    inline const error_category &  system_category() BOOST_SYSTEM_NOEXCEPT;
-    inline const error_category &  generic_category() BOOST_SYSTEM_NOEXCEPT;
-#else
-    BOOST_SYSTEM_DECL const error_category &  system_category() BOOST_SYSTEM_NOEXCEPT;
-    BOOST_SYSTEM_DECL const error_category &  generic_category() BOOST_SYSTEM_NOEXCEPT;
+    BOOST_SYSTEM_CONSTEXPR inline bool operator!=( const error_category & lhs,
+        const error_category & rhs ) BOOST_SYSTEM_NOEXCEPT
+        { return &lhs != &rhs; }
+
+    inline bool operator<( const error_category & lhs,
+        const error_category & rhs ) BOOST_SYSTEM_NOEXCEPT
+        { return std::less<const error_category*>()( &lhs, &rhs ); }
+
+#ifdef BOOST_MSVC
+#pragma warning(pop)
 #endif
-    //  deprecated synonyms --------------------------------------------------//
 
-# ifndef BOOST_SYSTEM_NO_DEPRECATED
+    //  predefined error categories  ---------------------------------------------------//
+
+namespace detail
+{
+
+#ifdef BOOST_ERROR_CODE_HEADER_ONLY
+# define BOOST_SYSTEM_DECL_
+#else
+# define BOOST_SYSTEM_DECL_ BOOST_SYSTEM_DECL
+#endif
+
+class generic_error_category: public error_category
+{
+public:
+
+    // clang++ 3.8 and below: initialization of const object
+    // requires a user-provided default constructor
+    BOOST_SYSTEM_CONSTEXPR generic_error_category() BOOST_SYSTEM_NOEXCEPT
+    {
+    }
+
+    const char * name() const BOOST_SYSTEM_NOEXCEPT
+    {
+        return "generic";
+    }
+
+    BOOST_SYSTEM_DECL_ std::string message( int ev ) const;
+};
+
+class system_error_category: public error_category
+{
+public:
+
+    BOOST_SYSTEM_CONSTEXPR system_error_category() BOOST_SYSTEM_NOEXCEPT
+    {
+    }
+
+    const char * name() const BOOST_SYSTEM_NOEXCEPT
+    {
+        return "system";
+    }
+
+    BOOST_SYSTEM_DECL_ std::string message( int ev ) const;
+    BOOST_SYSTEM_DECL_ error_condition default_error_condition( int ev ) const BOOST_SYSTEM_NOEXCEPT;
+};
+
+#undef BOOST_SYSTEM_DECL_
+
+} // namespace detail
+
+#define BOOST_SYSTEM_REQUIRE_CONST_INIT
+
+#if defined(__has_cpp_attribute)
+#if __has_cpp_attribute(clang::require_constant_initialization)
+# undef BOOST_SYSTEM_REQUIRE_CONST_INIT
+# define BOOST_SYSTEM_REQUIRE_CONST_INIT [[clang::require_constant_initialization]]
+#endif
+#endif
+
+#if defined(BOOST_ERROR_CODE_HEADER_ONLY)
+
+# if defined(BOOST_SYSTEM_HAS_CONSTEXPR)
+
+namespace detail
+{
+
+template<class T> struct cat_holder
+{
+    static system_error_category system_category_instance;
+    static generic_error_category generic_category_instance;
+};
+
+template<class T> BOOST_SYSTEM_REQUIRE_CONST_INIT system_error_category cat_holder<T>::system_category_instance;
+template<class T> BOOST_SYSTEM_REQUIRE_CONST_INIT generic_error_category cat_holder<T>::generic_category_instance;
+
+} // namespace detail
+
+constexpr const error_category & system_category() BOOST_SYSTEM_NOEXCEPT
+{
+    return detail::cat_holder<void>::system_category_instance;
+}
+
+constexpr const error_category & generic_category() BOOST_SYSTEM_NOEXCEPT
+{
+    return detail::cat_holder<void>::generic_category_instance;
+}
+
+# else
+
+inline const error_category & system_category() BOOST_SYSTEM_NOEXCEPT
+{
+    static const detail::system_error_category system_category_instance;
+    return system_category_instance;
+}
+
+inline const error_category & generic_category() BOOST_SYSTEM_NOEXCEPT
+{
+    static const detail::generic_error_category generic_category_instance;
+    return generic_category_instance;
+}
+
+# endif
+
+#elif defined(BOOST_SYSTEM_HAS_CONSTEXPR)
+
+namespace detail
+{
+
+#if defined(BOOST_SYSTEM_SOURCE)
+
+// clang++ requires a strictly matching declaration
+BOOST_SYSTEM_DECL extern system_error_category system_category_instance;
+BOOST_SYSTEM_DECL extern generic_error_category generic_category_instance;
+
+#else
+
+extern system_error_category system_category_instance;
+extern generic_error_category generic_category_instance;
+
+#endif
+
+} // namespace detail
+
+constexpr const error_category & system_category() BOOST_SYSTEM_NOEXCEPT
+{
+    return detail::system_category_instance;
+}
+
+constexpr const error_category & generic_category() BOOST_SYSTEM_NOEXCEPT
+{
+    return detail::generic_category_instance;
+}
+
+#else
+
+namespace detail
+{
+
+BOOST_SYSTEM_DECL const error_category & system_category_ncx() BOOST_SYSTEM_NOEXCEPT;
+BOOST_SYSTEM_DECL const error_category & generic_category_ncx() BOOST_SYSTEM_NOEXCEPT;
+
+} // namespace detail
+
+inline const error_category & system_category() BOOST_SYSTEM_NOEXCEPT
+{
+    return detail::system_category_ncx();
+}
+
+inline const error_category & generic_category() BOOST_SYSTEM_NOEXCEPT
+{
+    return detail::generic_category_ncx();
+}
+
+#endif
+
+    //  deprecated synonyms ------------------------------------------------------------//
+
+#ifdef BOOST_SYSTEM_ENABLE_DEPRECATED
     inline const error_category &  get_system_category() { return system_category(); }
     inline const error_category &  get_generic_category() { return generic_category(); }
     inline const error_category &  get_posix_category() { return generic_category(); }
-    static const error_category &  posix_category = generic_category();
-    static const error_category &  errno_ecat     = generic_category();
-    static const error_category &  native_ecat    = system_category();
-# endif
+    static const error_category &  posix_category BOOST_ATTRIBUTE_UNUSED
+      = generic_category();
+    static const error_category &  errno_ecat     BOOST_ATTRIBUTE_UNUSED
+      = generic_category();
+    static const error_category &  native_ecat    BOOST_ATTRIBUTE_UNUSED
+      = system_category();
+#endif
 
-    //  class error_condition  -----------------------------------------------//
+    //  class error_condition  ---------------------------------------------------------//
 
     //  error_conditions are portable, error_codes are system or library specific
 
@@ -232,60 +512,74 @@ namespace boost
     public:
 
       // constructors:
-      error_condition() BOOST_SYSTEM_NOEXCEPT : m_val(0), m_cat(&generic_category()) {}
-      error_condition( int val, const error_category & cat ) BOOST_SYSTEM_NOEXCEPT : m_val(val), m_cat(&cat) {}
+      BOOST_SYSTEM_CONSTEXPR error_condition() BOOST_SYSTEM_NOEXCEPT : m_val(0), m_cat(&generic_category()) {}
+      BOOST_SYSTEM_CONSTEXPR error_condition( int val, const error_category & cat ) BOOST_SYSTEM_NOEXCEPT
+        : m_val(val), m_cat(&cat) {}
 
       template <class ErrorConditionEnum>
         error_condition(ErrorConditionEnum e,
-          typename boost::enable_if<is_error_condition_enum<ErrorConditionEnum> >::type* = 0) BOOST_SYSTEM_NOEXCEPT
+          typename boost::enable_if<is_error_condition_enum<ErrorConditionEnum> >::type*
+            = 0) BOOST_SYSTEM_NOEXCEPT
       {
         *this = make_error_condition(e);
       }
 
       // modifiers:
 
-      void assign( int val, const error_category & cat ) BOOST_SYSTEM_NOEXCEPT
+      BOOST_SYSTEM_CONSTEXPR void assign( int val, const error_category & cat ) BOOST_SYSTEM_NOEXCEPT
       {
         m_val = val;
         m_cat = &cat;
       }
 
       template<typename ErrorConditionEnum>
-        typename boost::enable_if<is_error_condition_enum<ErrorConditionEnum>, error_condition>::type &
+        typename boost::enable_if<is_error_condition_enum<ErrorConditionEnum>,
+          error_condition>::type &
           operator=( ErrorConditionEnum val ) BOOST_SYSTEM_NOEXCEPT
       {
         *this = make_error_condition(val);
         return *this;
       }
 
-      void clear() BOOST_SYSTEM_NOEXCEPT
+      BOOST_SYSTEM_CONSTEXPR void clear() BOOST_SYSTEM_NOEXCEPT
       {
         m_val = 0;
         m_cat = &generic_category();
       }
 
       // observers:
-      int                     value() const BOOST_SYSTEM_NOEXCEPT    { return m_val; }
-      const error_category &  category() const BOOST_SYSTEM_NOEXCEPT { return *m_cat; }
+      BOOST_SYSTEM_CONSTEXPR int                     value() const BOOST_SYSTEM_NOEXCEPT    { return m_val; }
+      BOOST_SYSTEM_CONSTEXPR const error_category &  category() const BOOST_SYSTEM_NOEXCEPT { return *m_cat; }
       std::string             message() const  { return m_cat->message(value()); }
 
+#if !defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
+
+      BOOST_SYSTEM_CONSTEXPR explicit operator bool() const BOOST_SYSTEM_NOEXCEPT  // true if error
+      {
+        return m_val != 0;
+      }
+
+#else
+
       typedef void (*unspecified_bool_type)();
       static void unspecified_bool_true() {}
 
-      operator unspecified_bool_type() const BOOST_SYSTEM_NOEXCEPT  // true if error
+      BOOST_SYSTEM_CONSTEXPR operator unspecified_bool_type() const BOOST_SYSTEM_NOEXCEPT  // true if error
       {
         return m_val == 0 ? 0 : unspecified_bool_true;
       }
 
-      bool operator!() const BOOST_SYSTEM_NOEXCEPT  // true if no error
+      BOOST_SYSTEM_CONSTEXPR bool operator!() const BOOST_SYSTEM_NOEXCEPT  // true if no error
       {
         return m_val == 0;
       }
 
+#endif
+
       // relationals:
       //  the more symmetrical non-member syntax allows enum
       //  conversions work for both rhs and lhs.
-      inline friend bool operator==( const error_condition & lhs,
+      BOOST_SYSTEM_CONSTEXPR inline friend bool operator==( const error_condition & lhs,
                                      const error_condition & rhs ) BOOST_SYSTEM_NOEXCEPT
       {
         return lhs.m_cat == rhs.m_cat && lhs.m_val == rhs.m_val;
@@ -300,13 +594,22 @@ namespace boost
           || (lhs.m_cat == rhs.m_cat && lhs.m_val < rhs.m_val);
       }
 
+#ifndef BOOST_NO_CXX11_HDR_SYSTEM_ERROR
+
+      operator std::error_condition () const BOOST_SYSTEM_NOEXCEPT
+      {
+        return std::error_condition( value(), category() );
+      }
+
+#endif
+
     private:
       int                     m_val;
       const error_category *  m_cat;
 
     };
 
-    //  class error_code  ----------------------------------------------------//
+    //  class error_code  --------------------------------------------------------------//
 
     //  We want error_code to be a value type that can be copied without slicing
     //  and without requiring heap allocation, but we also want it to have
@@ -319,18 +622,20 @@ namespace boost
     public:
 
       // constructors:
-      error_code() BOOST_SYSTEM_NOEXCEPT : m_val(0), m_cat(&system_category()) {}
-      error_code( int val, const error_category & cat ) BOOST_SYSTEM_NOEXCEPT : m_val(val), m_cat(&cat) {}
+      BOOST_SYSTEM_CONSTEXPR error_code() BOOST_SYSTEM_NOEXCEPT : m_val(0), m_cat(&system_category()) {}
+      BOOST_SYSTEM_CONSTEXPR error_code( int val, const error_category & cat ) BOOST_SYSTEM_NOEXCEPT
+        : m_val(val), m_cat(&cat) {}
 
       template <class ErrorCodeEnum>
         error_code(ErrorCodeEnum e,
-          typename boost::enable_if<is_error_code_enum<ErrorCodeEnum> >::type* = 0) BOOST_SYSTEM_NOEXCEPT
+          typename boost::enable_if<is_error_code_enum<ErrorCodeEnum> >::type* = 0)
+          BOOST_SYSTEM_NOEXCEPT
       {
         *this = make_error_code(e);
       }
 
       // modifiers:
-      void assign( int val, const error_category & cat ) BOOST_SYSTEM_NOEXCEPT
+      BOOST_SYSTEM_CONSTEXPR void assign( int val, const error_category & cat ) BOOST_SYSTEM_NOEXCEPT
       {
         m_val = val;
         m_cat = &cat;
@@ -344,33 +649,45 @@ namespace boost
         return *this;
       }
 
-      void clear() BOOST_SYSTEM_NOEXCEPT
+      BOOST_SYSTEM_CONSTEXPR void clear() BOOST_SYSTEM_NOEXCEPT
       {
         m_val = 0;
         m_cat = &system_category();
       }
 
       // observers:
-      int                     value() const  BOOST_SYSTEM_NOEXCEPT   { return m_val; }
-      const error_category &  category() const BOOST_SYSTEM_NOEXCEPT { return *m_cat; }
-      error_condition         default_error_condition() const BOOST_SYSTEM_NOEXCEPT  { return m_cat->default_error_condition(value()); }
+      BOOST_SYSTEM_CONSTEXPR int                     value() const  BOOST_SYSTEM_NOEXCEPT   { return m_val; }
+      BOOST_SYSTEM_CONSTEXPR const error_category &  category() const BOOST_SYSTEM_NOEXCEPT { return *m_cat; }
+      error_condition         default_error_condition() const BOOST_SYSTEM_NOEXCEPT
+        { return m_cat->default_error_condition(value()); }
       std::string             message() const  { return m_cat->message(value()); }
 
+#if !defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
+
+      BOOST_SYSTEM_CONSTEXPR explicit operator bool() const BOOST_SYSTEM_NOEXCEPT  // true if error
+      {
+        return m_val != 0;
+      }
+
+#else
+
       typedef void (*unspecified_bool_type)();
       static void unspecified_bool_true() {}
 
-      operator unspecified_bool_type() const  BOOST_SYSTEM_NOEXCEPT // true if error
+      BOOST_SYSTEM_CONSTEXPR operator unspecified_bool_type() const  BOOST_SYSTEM_NOEXCEPT // true if error
       {
         return m_val == 0 ? 0 : unspecified_bool_true;
       }
 
-      bool operator!() const  BOOST_SYSTEM_NOEXCEPT // true if no error
+      BOOST_SYSTEM_CONSTEXPR bool operator!() const  BOOST_SYSTEM_NOEXCEPT // true if no error
       {
         return m_val == 0;
       }
 
+#endif
+
       // relationals:
-      inline friend bool operator==( const error_code & lhs,
+      BOOST_SYSTEM_CONSTEXPR inline friend bool operator==( const error_code & lhs,
                                      const error_code & rhs ) BOOST_SYSTEM_NOEXCEPT
         //  the more symmetrical non-member syntax allows enum
         //  conversions work for both rhs and lhs.
@@ -387,6 +704,15 @@ namespace boost
           || (lhs.m_cat == rhs.m_cat && lhs.m_val < rhs.m_val);
       }
 
+#ifndef BOOST_NO_CXX11_HDR_SYSTEM_ERROR
+
+      operator std::error_code () const BOOST_SYSTEM_NOEXCEPT
+      {
+        return std::error_code( value(), category() );
+      }
+
+#endif
+
     private:
       int                     m_val;
       const error_category *  m_cat;
@@ -394,7 +720,7 @@ namespace boost
     };
 
     //  predefined error_code object used as "throw on error" tag
-# ifndef BOOST_SYSTEM_NO_DEPRECATED
+# ifdef BOOST_SYSTEM_ENABLE_DEPRECATED
     BOOST_SYSTEM_DECL extern error_code throws;
 # endif
 
@@ -403,8 +729,9 @@ namespace boost
     //  "throws" function in namespace boost rather than namespace boost::system.
 
   }  // namespace system
-
-  namespace detail { inline system::error_code * throws() { return 0; } }
+                                                               
+  namespace detail
+  {
     //  Misuse of the error_code object is turned into a noisy failure by
     //  poisoning the reference. This particular implementation doesn't
     //  produce warnings or errors from popular compilers, is very efficient
@@ -412,21 +739,34 @@ namespace boost
     //  from order of initialization problems. In practice, it also seems
     //  cause user function error handling implementation errors to be detected
     //  very early in the development cycle.
+    inline system::error_code* throws()
+    {
+      // See github.com/boostorg/system/pull/12 by visigoth for why the return
+      // is poisoned with nonzero rather than (0). A test, test_throws_usage(),
+      // has been added to error_code_test.cpp, and as visigoth mentioned it
+      // fails on clang for release builds with a return of 0 but works fine
+      // with (1).
+      // Since the undefined behavior sanitizer (-fsanitize=undefined) does not
+      // allow a reference to be formed to the unaligned address of (1), we use
+      // (8) instead.
+      return reinterpret_cast<system::error_code*>(8);
+    }
+  }
 
-  inline system::error_code & throws()
+  inline system::error_code& throws()
     { return *detail::throws(); }
 
   namespace system
   {
     //  non-member functions  ------------------------------------------------//
 
-    inline bool operator!=( const error_code & lhs,
+    BOOST_SYSTEM_CONSTEXPR inline bool operator!=( const error_code & lhs,
                             const error_code & rhs ) BOOST_SYSTEM_NOEXCEPT
     {
       return !(lhs == rhs);
     }
 
-    inline bool operator!=( const error_condition & lhs,
+    BOOST_SYSTEM_CONSTEXPR inline bool operator!=( const error_condition & lhs,
                             const error_condition & rhs ) BOOST_SYSTEM_NOEXCEPT
     {
       return !(lhs == rhs);
@@ -474,7 +814,7 @@ namespace boost
         + reinterpret_cast<std::size_t>(&ec.category());
     }
 
-    //  make_* functions for errc::errc_t  -----------------------------//
+    //  make_* functions for errc::errc_t  ---------------------------------------------//
 
     namespace errc
     {
@@ -487,9 +827,10 @@ namespace boost
         { return error_condition( e, generic_category() ); }
     }
 
-    //  error_category default implementation  -------------------------------//
+    //  error_category default implementation  -----------------------------------------//
 
-    error_condition error_category::default_error_condition( int ev ) const BOOST_SYSTEM_NOEXCEPT
+    error_condition error_category::default_error_condition( int ev ) const
+      BOOST_SYSTEM_NOEXCEPT
     {
       return error_condition( ev, *this );
     }
@@ -506,6 +847,80 @@ namespace boost
       return *this == code.category() && code.value() == condition;
     }
 
+#ifndef BOOST_NO_CXX11_HDR_SYSTEM_ERROR
+
+    inline std::error_condition error_category::std_category::default_error_condition(
+      int ev ) const BOOST_NOEXCEPT
+    {
+      return pc_->default_error_condition( ev );
+    }
+
+    inline bool error_category::std_category::equivalent( int code,
+      const std::error_condition & condition ) const BOOST_NOEXCEPT
+    {
+      if( condition.category() == *this )
+      {
+        boost::system::error_condition bn( condition.value(), *pc_ );
+        return pc_->equivalent( code, bn );
+      }
+      else if( condition.category() == std::generic_category()
+        || condition.category() == boost::system::generic_category() )
+      {
+        boost::system::error_condition bn( condition.value(),
+          boost::system::generic_category() );
+
+        return pc_->equivalent( code, bn );
+      }
+#ifndef BOOST_NO_RTTI
+      else if( std_category const* pc2 = dynamic_cast< std_category const* >(
+        &condition.category() ) )
+      {
+        boost::system::error_condition bn( condition.value(), *pc2->pc_ );
+        return pc_->equivalent( code, bn );
+      }
+#endif
+      else
+      {
+        return default_error_condition( code ) == condition;
+      }
+    }
+
+    inline bool error_category::std_category::equivalent( const std::error_code & code,
+      int condition ) const BOOST_NOEXCEPT
+    {
+      if( code.category() == *this )
+      {
+        boost::system::error_code bc( code.value(), *pc_ );
+        return pc_->equivalent( bc, condition );
+      }
+      else if( code.category() == std::generic_category()
+        || code.category() == boost::system::generic_category() )
+      {
+        boost::system::error_code bc( code.value(),
+          boost::system::generic_category() );
+
+        return pc_->equivalent( bc, condition );
+      }
+#ifndef BOOST_NO_RTTI
+      else if( std_category const* pc2 = dynamic_cast< std_category const* >(
+        &code.category() ) )
+      {
+        boost::system::error_code bc( code.value(), *pc2->pc_ );
+        return pc_->equivalent( bc, condition );
+      }
+#endif
+      else if( *pc_ == boost::system::generic_category() )
+      {
+        return std::generic_category().equivalent( code, condition );
+      }
+      else
+      {
+        return false;
+      }
+    }
+
+#endif
+
   } // namespace system
 } // namespace boost
 
@@ -515,6 +930,4 @@ namespace boost
 #   include <boost/system/detail/error_code.ipp>
 # endif
 
-#endif // BOOST_ERROR_CODE_HPP
-
-
+#endif // BOOST_SYSTEM_ERROR_CODE_HPP

include/boost/system/linux_error.hpp

@@ -7,8 +7,8 @@
 
 //  See library home page at http://www.boost.org/libs/system
 
-#ifndef BOOST_LINUX_ERROR_HPP
-#define BOOST_LINUX_ERROR_HPP
+#ifndef BOOST_SYSTEM_LINUX_ERROR_HPP
+#define BOOST_SYSTEM_LINUX_ERROR_HPP
 
 //  This header is effectively empty for compiles on operating systems where
 //  it is not applicable.
@@ -89,7 +89,7 @@ namespace boost
       };
     }  // namespace linux_error
 
-# ifndef BOOST_SYSTEM_NO_DEPRECATED
+# ifdef BOOST_SYSTEM_ENABLE_DEPRECATED
     namespace Linux = linux_error;
 # endif
 
@@ -107,4 +107,4 @@ namespace boost
 
 #endif  // Linux
 
-#endif  // BOOST_LINUX_ERROR_HPP
+#endif  // BOOST_SYSTEM_LINUX_ERROR_HPP

include/boost/system/system_error.hpp

@@ -5,8 +5,8 @@
 //  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)
 
-#ifndef BOOST_SYSTEM_ERROR_HPP
-#define BOOST_SYSTEM_ERROR_HPP
+#ifndef BOOST_SYSTEM_SYSTEM_ERROR_HPP
+#define BOOST_SYSTEM_SYSTEM_ERROR_HPP
 
 #include <string>
 #include <stdexcept>
@@ -44,10 +44,10 @@ namespace boost
         const char * what_arg )
           : std::runtime_error(what_arg), m_error_code(ev,ecat) {}
 
-      virtual ~system_error() throw() {}
+      virtual ~system_error() BOOST_NOEXCEPT_OR_NOTHROW {}
 
-      const error_code &  code() const throw() { return m_error_code; }
-      const char *        what() const throw();
+      const error_code &  code() const BOOST_NOEXCEPT_OR_NOTHROW { return m_error_code; }
+      const char *        what() const BOOST_NOEXCEPT_OR_NOTHROW;
 
     private:
       error_code           m_error_code;
@@ -56,7 +56,7 @@ namespace boost
 
     //  implementation  ------------------------------------------------------//
 
-    inline const char * system_error::what() const throw()
+    inline const char * system_error::what() const BOOST_NOEXCEPT_OR_NOTHROW
     // see http://www.boost.org/more/error_handling.html for lazy build rationale
     {
       if ( m_what.empty() )
@@ -79,6 +79,6 @@ namespace boost
   } // namespace system
 } // namespace boost
 
-#endif // BOOST_SYSTEM_ERROR_HPP
+#endif // BOOST_SYSTEM_SYSTEM_ERROR_HPP
 
 

include/boost/system/windows_error.hpp

@@ -7,8 +7,8 @@
 
 //  See library home page at http://www.boost.org/libs/system
 
-#ifndef BOOST_WINDOWS_ERROR_HPP
-#define BOOST_WINDOWS_ERROR_HPP
+#ifndef BOOST_SYSTEM_WINDOWS_ERROR_HPP
+#define BOOST_SYSTEM_WINDOWS_ERROR_HPP
 
 //  This header is effectively empty for compiles on operating systems where
 //  it is not applicable.
@@ -19,14 +19,16 @@
 
 #include <boost/system/error_code.hpp>
 
-// Neither MinGW or Cygwin versions of winerror.h work if used alone, so on
-// either of those platforms include the full windows.h
+//// Neither MinGW or Cygwin versions of winerror.h work if used alone, so on
+//// either of those platforms include the full windows.h
+//
+//#if defined(__MINGW32__) || defined(__CYGWIN__)
+//#include <windows.h>
+//#else
+//#include <winerror.h>
+//#endif
 
-#if defined(__MINGW32__) || defined(__CYGWIN__)
-#include <windows.h>
-#else
-#include <winerror.h>
-#endif
+#include <boost/winapi/error_codes.hpp>
 
 namespace boost
 {
@@ -45,59 +47,59 @@ namespace boost
       {
         success = 0,
         // These names and values are based on Windows winerror.h
-        invalid_function = ERROR_INVALID_FUNCTION,
-        file_not_found = ERROR_FILE_NOT_FOUND,
-        path_not_found = ERROR_PATH_NOT_FOUND,
-        too_many_open_files = ERROR_TOO_MANY_OPEN_FILES,
-        access_denied = ERROR_ACCESS_DENIED,
-        invalid_handle = ERROR_INVALID_HANDLE,
-        arena_trashed = ERROR_ARENA_TRASHED,
-        not_enough_memory = ERROR_NOT_ENOUGH_MEMORY,
-        invalid_block = ERROR_INVALID_BLOCK,
-        bad_environment = ERROR_BAD_ENVIRONMENT,
-        bad_format = ERROR_BAD_FORMAT,
-        invalid_access = ERROR_INVALID_ACCESS,
-        outofmemory = ERROR_OUTOFMEMORY,
-        invalid_drive = ERROR_INVALID_DRIVE,
-        current_directory = ERROR_CURRENT_DIRECTORY,
-        not_same_device = ERROR_NOT_SAME_DEVICE,
-        no_more_files = ERROR_NO_MORE_FILES,
-        write_protect = ERROR_WRITE_PROTECT,
-        bad_unit = ERROR_BAD_UNIT,
-        not_ready = ERROR_NOT_READY,
-        bad_command = ERROR_BAD_COMMAND,
-        crc = ERROR_CRC,
-        bad_length = ERROR_BAD_LENGTH,
-        seek = ERROR_SEEK,
-        not_dos_disk = ERROR_NOT_DOS_DISK,
-        sector_not_found = ERROR_SECTOR_NOT_FOUND,
-        out_of_paper = ERROR_OUT_OF_PAPER,
-        write_fault = ERROR_WRITE_FAULT,
-        read_fault = ERROR_READ_FAULT,
-        gen_failure = ERROR_GEN_FAILURE,
-        sharing_violation = ERROR_SHARING_VIOLATION,
-        lock_violation = ERROR_LOCK_VIOLATION,
-        wrong_disk = ERROR_WRONG_DISK,
-        sharing_buffer_exceeded = ERROR_SHARING_BUFFER_EXCEEDED,
-        handle_eof = ERROR_HANDLE_EOF,
-        handle_disk_full= ERROR_HANDLE_DISK_FULL,
-        rem_not_list = ERROR_REM_NOT_LIST,
-        dup_name = ERROR_DUP_NAME,
-        bad_net_path = ERROR_BAD_NETPATH,
-        network_busy = ERROR_NETWORK_BUSY,
+        invalid_function = boost::winapi::ERROR_INVALID_FUNCTION_,
+        file_not_found = boost::winapi::ERROR_FILE_NOT_FOUND_,
+        path_not_found = boost::winapi::ERROR_PATH_NOT_FOUND_,
+        too_many_open_files = boost::winapi::ERROR_TOO_MANY_OPEN_FILES_,
+        access_denied = boost::winapi::ERROR_ACCESS_DENIED_,
+        invalid_handle = boost::winapi::ERROR_INVALID_HANDLE_,
+        arena_trashed = boost::winapi::ERROR_ARENA_TRASHED_,
+        not_enough_memory = boost::winapi::ERROR_NOT_ENOUGH_MEMORY_,
+        invalid_block = boost::winapi::ERROR_INVALID_BLOCK_,
+        bad_environment = boost::winapi::ERROR_BAD_ENVIRONMENT_,
+        bad_format = boost::winapi::ERROR_BAD_FORMAT_,
+        invalid_access = boost::winapi::ERROR_INVALID_ACCESS_,
+        outofmemory = boost::winapi::ERROR_OUTOFMEMORY_,
+        invalid_drive = boost::winapi::ERROR_INVALID_DRIVE_,
+        current_directory = boost::winapi::ERROR_CURRENT_DIRECTORY_,
+        not_same_device = boost::winapi::ERROR_NOT_SAME_DEVICE_,
+        no_more_files = boost::winapi::ERROR_NO_MORE_FILES_,
+        write_protect = boost::winapi::ERROR_WRITE_PROTECT_,
+        bad_unit = boost::winapi::ERROR_BAD_UNIT_,
+        not_ready = boost::winapi::ERROR_NOT_READY_,
+        bad_command = boost::winapi::ERROR_BAD_COMMAND_,
+        crc = boost::winapi::ERROR_CRC_,
+        bad_length = boost::winapi::ERROR_BAD_LENGTH_,
+        seek = boost::winapi::ERROR_SEEK_,
+        not_dos_disk = boost::winapi::ERROR_NOT_DOS_DISK_,
+        sector_not_found = boost::winapi::ERROR_SECTOR_NOT_FOUND_,
+        out_of_paper = boost::winapi::ERROR_OUT_OF_PAPER_,
+        write_fault = boost::winapi::ERROR_WRITE_FAULT_,
+        read_fault = boost::winapi::ERROR_READ_FAULT_,
+        gen_failure = boost::winapi::ERROR_GEN_FAILURE_,
+        sharing_violation = boost::winapi::ERROR_SHARING_VIOLATION_,
+        lock_violation = boost::winapi::ERROR_LOCK_VIOLATION_,
+        wrong_disk = boost::winapi::ERROR_WRONG_DISK_,
+        sharing_buffer_exceeded = boost::winapi::ERROR_SHARING_BUFFER_EXCEEDED_,
+        handle_eof = boost::winapi::ERROR_HANDLE_EOF_,
+        handle_disk_full= boost::winapi::ERROR_HANDLE_DISK_FULL_,
+        rem_not_list = boost::winapi::ERROR_REM_NOT_LIST_,
+        dup_name = boost::winapi::ERROR_DUP_NAME_,
+        bad_net_path = boost::winapi::ERROR_BAD_NETPATH_,
+        network_busy = boost::winapi::ERROR_NETWORK_BUSY_,
         // ...
-        file_exists = ERROR_FILE_EXISTS,
-        cannot_make = ERROR_CANNOT_MAKE,
+        file_exists = boost::winapi::ERROR_FILE_EXISTS_,
+        cannot_make = boost::winapi::ERROR_CANNOT_MAKE_,
         // ...
-        broken_pipe = ERROR_BROKEN_PIPE,
-        open_failed = ERROR_OPEN_FAILED,
-        buffer_overflow = ERROR_BUFFER_OVERFLOW,
-        disk_full= ERROR_DISK_FULL,
+        broken_pipe = boost::winapi::ERROR_BROKEN_PIPE_,
+        open_failed = boost::winapi::ERROR_OPEN_FAILED_,
+        buffer_overflow = boost::winapi::ERROR_BUFFER_OVERFLOW_,
+        disk_full= boost::winapi::ERROR_DISK_FULL_,
         // ...
-        lock_failed = ERROR_LOCK_FAILED,
-        busy = ERROR_BUSY,
-        cancel_violation = ERROR_CANCEL_VIOLATION,
-        already_exists = ERROR_ALREADY_EXISTS
+        lock_failed = boost::winapi::ERROR_LOCK_FAILED_,
+        busy = boost::winapi::ERROR_BUSY_,
+        cancel_violation = boost::winapi::ERROR_CANCEL_VIOLATION_,
+        already_exists = boost::winapi::ERROR_ALREADY_EXISTS_
         // ...
 
         // TODO: add more Windows errors
@@ -105,7 +107,7 @@ namespace boost
 
     }  // namespace windows
 
-# ifndef BOOST_SYSTEM_NO_DEPRECATED
+# ifdef BOOST_SYSTEM_ENABLE_DEPRECATED
     namespace windows = windows_error;
 # endif
 
@@ -123,4 +125,4 @@ namespace boost
 
 #endif  // BOOST_WINDOWS_API
 
-#endif  // BOOST_WINDOWS_ERROR_HPP
+#endif  // BOOST_SYSTEM_WINDOWS_ERROR_HPP

meta/libraries.json

@@ -0,0 +1,11 @@
+{
+    "key": "system",
+    "name": "System",
+    "authors": [
+        "Beman Dawes"
+    ],
+    "description": "Operating system support, including the diagnostics support that will be part of the C++0x standard library.",
+    "category": [
+        "System"
+    ]
+}

test/Jamfile.v2

@@ -7,6 +7,8 @@
 
 # See library home page at http://www.boost.org/libs/system
 
+import testing ;
+import os ;
 
 project
     : requirements
@@ -19,40 +21,113 @@ project
      : <link>shared:<define>BOOST_SYSTEM_DYN_LINK=1
        <link>static:<define>BOOST_SYSTEM_STATIC_LINK=1
      ;
-   
+
+   lib single_instance_lib1 : single_instance_1.cpp : <link>shared:<define>SINGLE_INSTANCE_DYN_LINK ;
+   lib single_instance_lib2 : single_instance_2.cpp : <link>shared:<define>SINGLE_INSTANCE_DYN_LINK ;
+
+   rule cxx03 ( properties * )
+   {
+      local result ;
+
+      if <toolset>gcc in $(properties)
+      {
+         result = <cxxflags>-std=c++98 ; # 4.4 has no 03
+      }
+      else if <toolset>clang in $(properties)
+      {
+         result = <cxxflags>-std=c++03 ;
+      }
+      else
+      {
+         result = <build>no ;
+      }
+
+      return $(result) ;
+   }
+
+   rule cxx11 ( properties * )
+   {
+      local result ;
+
+      if <toolset>gcc in $(properties)
+      {
+         result = <cxxflags>-std=c++0x ; # 4.6 has no 11
+      }
+      else if <toolset>clang in $(properties)
+      {
+         result = <cxxflags>-std=c++11 ;
+      }
+      else
+      {
+         result = <build>no ;
+      }
+
+      return $(result) ;
+   }
+
+   rule system-run- ( sources + )
+   {
+      local result ;
+
+      result += [ run $(sources) : : : <link>static : $(sources[1]:B)_static ] ;
+      result += [ run $(sources) : : : <link>shared : $(sources[1]:B)_shared ] ;
+      result += [ run $(sources) : : : -<library>/boost/system//boost_system <define>BOOST_ERROR_CODE_HEADER_ONLY : $(sources[1]:B)_header ] ;
+
+      return $(result) ;
+   }
+
+if [ os.environ UBSAN ]
+{
+   rule system-run ( sources + )
+   {
+      # The 03/11 tests are ODR violations, no point running them under -fsanitize=undefined
+      return [ system-run- $(sources) ] ;
+   }
+}
+else
+{
+   rule system-run ( sources + )
+   {
+      local result = [ system-run- $(sources) ] ;
+
+      # Test a source file built with -std=c++03 linked with a System library built without -std=c++03
+      result += [ run $(sources) : : : <link>static <conditional>@cxx03 : $(sources[1]:B)_static_03 ] ;
+      result += [ run $(sources) : : : <link>shared <conditional>@cxx03 : $(sources[1]:B)_shared_03 ] ;
+
+      # Test a source file built with -std=c++11 linked with a System library built without -std=c++11
+      result += [ run $(sources) : : : <link>static <conditional>@cxx11 : $(sources[1]:B)_static_11 ] ;
+      result += [ run $(sources) : : : <link>shared <conditional>@cxx11 : $(sources[1]:B)_shared_11 ] ;
+
+      return $(result) ;
+   }
+}
 
    test-suite "system"
-       : [ run error_code_test.cpp
-           : # command line
-           : # input files
-           : # requirements
-                   <link>static
-         ]
-         [ run error_code_test.cpp
-           :  :  : <link>shared : error_code_test_shared
-         ]
-         [ run error_code_user_test.cpp
-           :  :  : <link>static
-         ]
-         [ run error_code_user_test.cpp
-           :  :  : <link>shared : error_code_user_test_shared
-         ]
-         [ run system_error_test.cpp
-           :  :  : <link>static
-         ]
-         [ run system_error_test.cpp
-            :  :  : <link>shared : system_error_test_shared
-         ]
+       : [ system-run error_code_test.cpp ]
+         [ system-run error_code_user_test.cpp ]
+         [ system-run system_error_test.cpp ]
          [ run dynamic_link_test.cpp throw_test
            :  :  : <link>shared : throw_test_shared
          ]
-         [ run initialization_test.cpp
-            :  :  : <link>shared : initialization_test_shared
+         [ system-run initialization_test.cpp ]
+         [ run header_only_test.cpp
+           :  :  : -<library>/boost/system//boost_system
          ]
          [ run header_only_test.cpp
-           :  :  : <link>static
+           :  :  : -<library>/boost/system//boost_system <define>BOOST_NO_ANSI_APIS : header_only_test_no_ansi
          ]
          [ run config_test.cpp
-           :  :  : <test-info>always_show_run_output 
+           :  :  : <test-info>always_show_run_output
          ]
+         [ system-run- std_interop_test.cpp ]
+         [ system-run std_mismatch_test.cpp ]
+         [ system-run single_instance_test.cpp single_instance_1.cpp single_instance_2.cpp ]
+         [ run single_instance_test.cpp single_instance_lib1 single_instance_lib2 : : : <link>static : single_instance_lib_static ]
+         [ run single_instance_test.cpp single_instance_lib1 single_instance_lib2 : : : <link>shared : single_instance_lib_shared ]
+         [ system-run before_main_test.cpp ]
+         [ run-fail throws_assign_fail.cpp ]
+         [ system-run- constexpr_test.cpp ]
          ;
+
+# Quick (CI) test
+run quick.cpp ;

test/before_main_test.cpp

@@ -0,0 +1,30 @@
+
+// Copyright 2018 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+
+#include <boost/system/error_code.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <cerrno>
+
+using namespace boost::system;
+
+static error_code e1( 1, system_category() );
+static std::string m1 = e1.message();
+
+static error_code e2( ENOENT, generic_category() );
+static std::string m2 = e2.message();
+
+int main()
+{
+    error_code e1_( 1, system_category() );
+
+    BOOST_TEST_EQ( e1, e1_ );
+    BOOST_TEST_EQ( m1, e1_.message() );
+
+    error_code e2_( ENOENT, generic_category() );
+
+    BOOST_TEST_EQ( e2, e2_ );
+    BOOST_TEST_EQ( m2, e2_.message() );
+
+    return boost::report_errors();
+}

test/config_test.cpp

@@ -41,7 +41,8 @@ int main()
   std::cout << "BOOST_POSIX_API is not defined" << std::endl;
 #endif
 #ifdef BOOST_PLAT_WINDOWS_DESKTOP
-  std::cout << "BOOST_PLAT_WINDOWS_DESKTOP is defined" << std::endl;
+  std::cout << "BOOST_PLAT_WINDOWS_DESKTOP is defined as "
+    << BOOST_PLAT_WINDOWS_DESKTOP << std::endl;
 #else
   std::cout << "BOOST_PLAT_WINDOWS_DESKTOP is not defined" << std::endl;
 #endif

test/constexpr_test.cpp

@@ -0,0 +1,68 @@
+
+// Copyright 2018 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+
+#include <boost/system/error_code.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config/pragma_message.hpp>
+#include <boost/static_assert.hpp>
+#include <boost/config.hpp>
+#include <boost/config/workaround.hpp>
+
+#if !defined(BOOST_SYSTEM_HAS_CONSTEXPR)
+
+BOOST_PRAGMA_MESSAGE("Skipping constexpr test, BOOST_SYSTEM_HAS_CONSTEXPR isn't defined")
+int main() {}
+
+#else
+
+using namespace boost::system;
+
+constexpr error_code e1( 1, system_category() );
+
+BOOST_STATIC_ASSERT( e1.value() == 1 );
+BOOST_STATIC_ASSERT( e1.category() == system_category() );
+BOOST_STATIC_ASSERT( e1 );
+BOOST_STATIC_ASSERT( e1 == e1 );
+
+constexpr error_code e2( 2, generic_category() );
+
+BOOST_STATIC_ASSERT( e2.value() == 2 );
+BOOST_STATIC_ASSERT( e2.category() == generic_category() );
+BOOST_STATIC_ASSERT( e2 );
+BOOST_STATIC_ASSERT( e2 == e2 );
+
+#if !BOOST_WORKAROUND(BOOST_GCC, < 80200)
+
+BOOST_STATIC_ASSERT( e1 != e2 );
+
+#endif
+
+constexpr error_code e3;
+
+BOOST_STATIC_ASSERT( e3.value() == 0 );
+BOOST_STATIC_ASSERT( e3.category() == system_category() );
+BOOST_STATIC_ASSERT( !e3 );
+BOOST_STATIC_ASSERT( e3 == e3 );
+
+#if !BOOST_WORKAROUND(BOOST_GCC, < 80200)
+
+BOOST_STATIC_ASSERT( e1 != e3 );
+
+#endif
+
+int main()
+{
+    error_code e1_( 1, system_category() );
+    BOOST_TEST_EQ( e1, e1_ );
+
+    error_code e2_( 2, generic_category() );
+    BOOST_TEST_EQ( e2, e2_ );
+
+    error_code e3_;
+    BOOST_TEST_EQ( e3, e3_ );
+
+    return boost::report_errors();
+}
+
+#endif

test/error_code_test.cpp

@@ -9,9 +9,6 @@
 
 //----------------------------------------------------------------------------//
 
-//  test without deprecated features
-#define BOOST_SYSTEM_NO_DEPRECATED
-
 #include <boost/config/warning_disable.hpp>
 
 #include <boost/detail/lightweight_test.hpp>
@@ -30,14 +27,20 @@
 //  with a boost::system using directive increases use scenario coverage.
 using namespace boost::system;
 
-# if defined( BOOST_WINDOWS_API )
-#   include "winerror.h"
-#   define BOOST_ACCESS_ERROR_MACRO ERROR_ACCESS_DENIED
-# elif defined( BOOST_POSIX_API )
-#   define BOOST_ACCESS_ERROR_MACRO EACCES
-# else
-#   error "Only supported for POSIX and Windows"
-# endif
+#if defined( BOOST_WINDOWS_API )
+// Neither MinGW or Cygwin versions of winerror.h work if used alone, so on
+// either of those platforms include the full windows.h
+#  if defined(__MINGW32__) || defined(__CYGWIN__)
+#    include <windows.h>
+#  else
+#    include <winerror.h>
+#  endif
+#  define BOOST_ACCESS_ERROR_MACRO ERROR_ACCESS_DENIED
+#elif defined( BOOST_POSIX_API )
+#  define BOOST_ACCESS_ERROR_MACRO EACCES
+#else
+#  error "Only supported for POSIX and Windows"
+#endif
 
 namespace
 {
@@ -50,6 +53,53 @@ namespace
     ss >> s;
     BOOST_TEST( s == expected );
   }
+
+  //  throws_function_test  ------------------------------------------------------------//
+
+  //  usage example
+
+  int divide(int dividend, int divisor, boost::system::error_code& ec = boost::throws())
+  {
+    if (divisor == 0)                            // is there an error?
+    {
+      if (&ec == &boost::throws())               // throw on error
+        throw "oops!";                           // whatever exception you prefer
+      ec = error_code(EDOM, generic_category()); // report error via error_code
+      return 0;
+    }
+    
+    if (&ec != &boost::throws())                 // error reporting via error_code
+      ec.clear();
+    return dividend / divisor;
+  }
+
+  //  test usage example
+
+  void test_throws_usage()
+  {
+    std::cout << "Test throws() example and usage...\n";
+    error_code ec;
+
+    // no error tests
+    BOOST_TEST_EQ((divide(10, 2)), 5);        // no error, report via exception
+    ec = make_error_code(errc::argument_out_of_domain);
+    BOOST_TEST_EQ((divide(10, 5, ec)), 2);    // no error, report via error_code
+    BOOST_TEST(!ec);
+
+    ec = make_error_code(errc::argument_out_of_domain);
+    BOOST_TEST_EQ((divide(10, 0, ec)), 0);    // error, report via error_code
+    BOOST_TEST(ec);
+
+    bool exception_thrown = false;            
+    try
+      { divide(10, 0); }                      // error, report via exception
+    catch (...)
+      { exception_thrown = true; }            
+    BOOST_TEST(exception_thrown);
+
+    //error_code should_fail(boost::throws());     // should fail at runtime
+    //boost::throws() = ec;                        // should fail at runtime
+  }
 }
 
 //  main  ------------------------------------------------------------------------------//
@@ -196,6 +246,8 @@ int main( int, char ** )
   BOOST_TEST( econd.message() != "" );
   BOOST_TEST( econd.message().substr( 0, 13) != "Unknown error" );
 
+  test_throws_usage();
+
 #ifdef BOOST_WINDOWS_API
   std::cout << "Windows tests...\n";
   // these tests probe the Windows errc decoder

test/error_code_user_test.cpp

@@ -14,8 +14,6 @@
 
 //  Motivation was a Boost posting by Christopher Kohlhoff on June 28, 2006.
 
-#define BOOST_SYSTEM_NO_DEPRECATED
-
 #include <boost/system/error_code.hpp>
 #include <boost/cerrno.hpp>
 #include <string>

test/header_only_test.cpp

@@ -1,4 +1,4 @@
-//  error_code_test.cpp  -----------------------------------------------------//
+//  header_only_test.cpp  -----------------------------------------------------//
 
 //  Copyright Beman Dawes 2007
 

test/initialization_test.cpp

@@ -10,19 +10,19 @@
 //  This test verifiies that the error_category vtable does not suffer from
 //  order-of-initialization problems.
 
-#include <boost/detail/lightweight_test.hpp>
 #include <boost/system/error_code.hpp>
+#include <boost/core/lightweight_test.hpp>
 
 struct foo
 {
   foo()
   {
     boost::system::error_code ec;
-    ec == boost::system::posix::permission_denied;
+    BOOST_TEST_NE( ec, boost::system::errc::permission_denied );
   }
 } f;
 
-int main( int, char ** )
+int main()
 {
-  return ::boost::report_errors();
+  return boost::report_errors();
 }

test/msvc/config_test/config_test.vcxproj

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -19,13 +19,13 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -82,6 +82,15 @@
   <ItemGroup>
     <ClCompile Include="..\..\config_test.cpp" />
   </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="..\..\..\include\boost\system\api_config.hpp" />
+    <ClInclude Include="..\..\..\include\boost\system\config.hpp" />
+    <ClInclude Include="..\..\..\include\boost\system\cygwin_error.hpp" />
+    <ClInclude Include="..\..\..\include\boost\system\error_code.hpp" />
+    <ClInclude Include="..\..\..\include\boost\system\linux_error.hpp" />
+    <ClInclude Include="..\..\..\include\boost\system\system_error.hpp" />
+    <ClInclude Include="..\..\..\include\boost\system\windows_error.hpp" />
+  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>

test/msvc/error_code_test/error_code_test.vcxproj

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -19,13 +19,13 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>

test/msvc/header_only_error_code_test/header_only_error_code_test.vcxproj

@@ -0,0 +1,151 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>15.0</VCProjectVersion>
+    <ProjectGuid>{C25D7BD7-1B99-4DA9-A1A5-3034410CBEF7}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>header_only_error_code_test</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0.14393.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\common.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\common.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\common.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\common.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions);BOOST_ERROR_CODE_HEADER_ONLY</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions);BOOST_ERROR_CODE_HEADER_ONLY</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions);BOOST_ERROR_CODE_HEADER_ONLY</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions);BOOST_ERROR_CODE_HEADER_ONLY</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\error_code_test.cpp" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

test/msvc/header_only_test/header_only_test.vcxproj

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -19,13 +19,13 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>

test/msvc/std_interop_test/std_interop_test.vcxproj

@@ -0,0 +1,156 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>15.0</VCProjectVersion>
+    <ProjectGuid>{47B0A041-1EB5-4842-BD17-BA0DCC5E0313}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>std_interop_test</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0.14393.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v141</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>Unicode</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\common.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\common.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\common.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="..\common.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <WarningLevel>Level3</WarningLevel>
+      <Optimization>Disabled</Optimization>
+      <PreprocessorDefinitions>_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <PrecompiledHeader>
+      </PrecompiledHeader>
+      <Optimization>MaxSpeed</Optimization>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <PreprocessorDefinitions>NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="..\..\std_interop_test.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\system-dll\system-dll.vcxproj">
+      <Project>{419402d4-f990-4b05-a459-655e2dc33dc2}</Project>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>

test/msvc/system-dll/system-dll.vcxproj

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
@@ -19,13 +19,13 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v120</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -54,6 +54,7 @@
       <WarningLevel>Level3</WarningLevel>
       <Optimization>Disabled</Optimization>
       <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;SYSTEMDLL_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <LanguageStandard>stdcpplatest</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>

test/msvc/system.sln

@@ -0,0 +1,83 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.26430.6
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "system-dll", "system-dll\system-dll.vcxproj", "{419402D4-F990-4B05-A459-655E2DC33DC2}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "error_code_test", "error_code_test\error_code_test.vcxproj", "{E50C14DC-547D-4C33-83EA-653C0D0D4E64}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "header_only_test", "header_only_test\header_only_test.vcxproj", "{3773451B-A618-4A26-A7F2-85554F4BD21B}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "config_test", "config_test\config_test.vcxproj", "{E18C2B56-DCEC-438F-9C38-3C8B08B65247}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "clang-system-dll", "clang-system-dll\clang-system-dll.vcxproj", "{30993F97-5E77-4B5A-B25F-B545C276077A}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "std_interop_test", "std_interop_test\std_interop_test.vcxproj", "{47B0A041-1EB5-4842-BD17-BA0DCC5E0313}"
+	ProjectSection(ProjectDependencies) = postProject
+		{419402D4-F990-4B05-A459-655E2DC33DC2} = {419402D4-F990-4B05-A459-655E2DC33DC2}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "header_only_error_code_test", "header_only_error_code_test\header_only_error_code_test.vcxproj", "{C25D7BD7-1B99-4DA9-A1A5-3034410CBEF7}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Win32 = Debug|Win32
+		Debug|x64 = Debug|x64
+		Release|Win32 = Release|Win32
+		Release|x64 = Release|x64
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{419402D4-F990-4B05-A459-655E2DC33DC2}.Debug|Win32.ActiveCfg = Debug|Win32
+		{419402D4-F990-4B05-A459-655E2DC33DC2}.Debug|Win32.Build.0 = Debug|Win32
+		{419402D4-F990-4B05-A459-655E2DC33DC2}.Debug|x64.ActiveCfg = Debug|Win32
+		{419402D4-F990-4B05-A459-655E2DC33DC2}.Release|Win32.ActiveCfg = Release|Win32
+		{419402D4-F990-4B05-A459-655E2DC33DC2}.Release|Win32.Build.0 = Release|Win32
+		{419402D4-F990-4B05-A459-655E2DC33DC2}.Release|x64.ActiveCfg = Release|Win32
+		{E50C14DC-547D-4C33-83EA-653C0D0D4E64}.Debug|Win32.ActiveCfg = Debug|Win32
+		{E50C14DC-547D-4C33-83EA-653C0D0D4E64}.Debug|Win32.Build.0 = Debug|Win32
+		{E50C14DC-547D-4C33-83EA-653C0D0D4E64}.Debug|x64.ActiveCfg = Debug|Win32
+		{E50C14DC-547D-4C33-83EA-653C0D0D4E64}.Release|Win32.ActiveCfg = Release|Win32
+		{E50C14DC-547D-4C33-83EA-653C0D0D4E64}.Release|Win32.Build.0 = Release|Win32
+		{E50C14DC-547D-4C33-83EA-653C0D0D4E64}.Release|x64.ActiveCfg = Release|Win32
+		{3773451B-A618-4A26-A7F2-85554F4BD21B}.Debug|Win32.ActiveCfg = Debug|Win32
+		{3773451B-A618-4A26-A7F2-85554F4BD21B}.Debug|Win32.Build.0 = Debug|Win32
+		{3773451B-A618-4A26-A7F2-85554F4BD21B}.Debug|x64.ActiveCfg = Debug|Win32
+		{3773451B-A618-4A26-A7F2-85554F4BD21B}.Release|Win32.ActiveCfg = Release|Win32
+		{3773451B-A618-4A26-A7F2-85554F4BD21B}.Release|Win32.Build.0 = Release|Win32
+		{3773451B-A618-4A26-A7F2-85554F4BD21B}.Release|x64.ActiveCfg = Release|Win32
+		{E18C2B56-DCEC-438F-9C38-3C8B08B65247}.Debug|Win32.ActiveCfg = Debug|Win32
+		{E18C2B56-DCEC-438F-9C38-3C8B08B65247}.Debug|Win32.Build.0 = Debug|Win32
+		{E18C2B56-DCEC-438F-9C38-3C8B08B65247}.Debug|x64.ActiveCfg = Debug|Win32
+		{E18C2B56-DCEC-438F-9C38-3C8B08B65247}.Release|Win32.ActiveCfg = Release|Win32
+		{E18C2B56-DCEC-438F-9C38-3C8B08B65247}.Release|Win32.Build.0 = Release|Win32
+		{E18C2B56-DCEC-438F-9C38-3C8B08B65247}.Release|x64.ActiveCfg = Release|Win32
+		{30993F97-5E77-4B5A-B25F-B545C276077A}.Debug|Win32.ActiveCfg = Debug|Win32
+		{30993F97-5E77-4B5A-B25F-B545C276077A}.Debug|Win32.Build.0 = Debug|Win32
+		{30993F97-5E77-4B5A-B25F-B545C276077A}.Debug|x64.ActiveCfg = Debug|x64
+		{30993F97-5E77-4B5A-B25F-B545C276077A}.Debug|x64.Build.0 = Debug|x64
+		{30993F97-5E77-4B5A-B25F-B545C276077A}.Release|Win32.ActiveCfg = Release|Win32
+		{30993F97-5E77-4B5A-B25F-B545C276077A}.Release|Win32.Build.0 = Release|Win32
+		{30993F97-5E77-4B5A-B25F-B545C276077A}.Release|x64.ActiveCfg = Release|x64
+		{30993F97-5E77-4B5A-B25F-B545C276077A}.Release|x64.Build.0 = Release|x64
+		{47B0A041-1EB5-4842-BD17-BA0DCC5E0313}.Debug|Win32.ActiveCfg = Debug|Win32
+		{47B0A041-1EB5-4842-BD17-BA0DCC5E0313}.Debug|Win32.Build.0 = Debug|Win32
+		{47B0A041-1EB5-4842-BD17-BA0DCC5E0313}.Debug|x64.ActiveCfg = Debug|x64
+		{47B0A041-1EB5-4842-BD17-BA0DCC5E0313}.Debug|x64.Build.0 = Debug|x64
+		{47B0A041-1EB5-4842-BD17-BA0DCC5E0313}.Release|Win32.ActiveCfg = Release|Win32
+		{47B0A041-1EB5-4842-BD17-BA0DCC5E0313}.Release|Win32.Build.0 = Release|Win32
+		{47B0A041-1EB5-4842-BD17-BA0DCC5E0313}.Release|x64.ActiveCfg = Release|x64
+		{47B0A041-1EB5-4842-BD17-BA0DCC5E0313}.Release|x64.Build.0 = Release|x64
+		{C25D7BD7-1B99-4DA9-A1A5-3034410CBEF7}.Debug|Win32.ActiveCfg = Debug|Win32
+		{C25D7BD7-1B99-4DA9-A1A5-3034410CBEF7}.Debug|Win32.Build.0 = Debug|Win32
+		{C25D7BD7-1B99-4DA9-A1A5-3034410CBEF7}.Debug|x64.ActiveCfg = Debug|x64
+		{C25D7BD7-1B99-4DA9-A1A5-3034410CBEF7}.Debug|x64.Build.0 = Debug|x64
+		{C25D7BD7-1B99-4DA9-A1A5-3034410CBEF7}.Release|Win32.ActiveCfg = Release|Win32
+		{C25D7BD7-1B99-4DA9-A1A5-3034410CBEF7}.Release|Win32.Build.0 = Release|Win32
+		{C25D7BD7-1B99-4DA9-A1A5-3034410CBEF7}.Release|x64.ActiveCfg = Release|x64
+		{C25D7BD7-1B99-4DA9-A1A5-3034410CBEF7}.Release|x64.Build.0 = Release|x64
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

test/quick.cpp

@@ -0,0 +1,36 @@
+
+// Copyright 2017 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 library home page at http://www.boost.org/libs/system
+
+#include <boost/system/error_code.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <cerrno>
+
+int main()
+{
+    boost::system::error_category const & bt = boost::system::generic_category();
+
+    int ev = ENOENT;
+
+    boost::system::error_code bc( ev, bt );
+
+    BOOST_TEST_EQ( bc.value(), ev );
+    BOOST_TEST_EQ( &bc.category(), &bt );
+
+    boost::system::error_condition bn = bt.default_error_condition( ev );
+
+    BOOST_TEST_EQ( bn.value(), ev );
+    BOOST_TEST_EQ( &bn.category(), &bt );
+
+    BOOST_TEST( bt.equivalent( ev, bn ) );
+
+    BOOST_TEST( bc == bn );
+
+    return boost::report_errors();
+}

test/single_instance_1.cpp

@@ -0,0 +1,29 @@
+
+// Copyright 2018 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+
+#include <boost/config.hpp>
+
+#if defined(SINGLE_INSTANCE_DYN_LINK)
+# define EXPORT BOOST_SYMBOL_EXPORT
+#else
+# define EXPORT
+#endif
+
+#include <boost/system/error_code.hpp>
+using namespace boost::system;
+
+namespace lib1
+{
+
+EXPORT error_code get_system_code()
+{
+    return error_code( 0, system_category() );
+}
+
+EXPORT error_code get_generic_code()
+{
+    return error_code( 0, generic_category() );
+}
+
+} // namespace lib1

test/single_instance_2.cpp

@@ -0,0 +1,29 @@
+
+// Copyright 2018 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+
+#include <boost/config.hpp>
+
+#if defined(SINGLE_INSTANCE_DYN_LINK)
+# define EXPORT BOOST_SYMBOL_EXPORT
+#else
+# define EXPORT
+#endif
+
+#include <boost/system/error_code.hpp>
+using namespace boost::system;
+
+namespace lib2
+{
+
+EXPORT error_code get_system_code()
+{
+    return error_code( 0, system_category() );
+}
+
+EXPORT error_code get_generic_code()
+{
+    return error_code( 0, generic_category() );
+}
+
+} // namespace lib2

test/single_instance_test.cpp

@@ -0,0 +1,32 @@
+
+// Copyright 2018 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+
+#include <boost/system/error_code.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+using namespace boost::system;
+
+namespace lib1
+{
+
+error_code get_system_code();
+error_code get_generic_code();
+
+} // namespace lib1
+
+namespace lib2
+{
+
+error_code get_system_code();
+error_code get_generic_code();
+
+} // namespace lib2
+
+int main()
+{
+    BOOST_TEST_EQ( lib1::get_system_code(), lib2::get_system_code() );
+    BOOST_TEST_EQ( lib1::get_generic_code(), lib2::get_generic_code() );
+
+    return boost::report_errors();
+}

test/std_interop_test.cpp

@@ -0,0 +1,370 @@
+
+// Copyright 2017 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 library home page at http://www.boost.org/libs/system
+
+// Avoid spurious VC++ warnings
+# define _CRT_SECURE_NO_WARNINGS
+
+#include <boost/config.hpp>
+#include <iostream>
+
+#if defined(BOOST_NO_CXX11_HDR_SYSTEM_ERROR)
+
+int main()
+{
+  std::cout
+    << "The version of the C++ standard library being used does not"
+    " support header <system_error> so interoperation will not be tested.\n";
+}
+
+#else
+
+#include <boost/system/error_code.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <system_error>
+#include <cerrno>
+#include <string>
+#include <cstdio>
+
+static void test_generic_category()
+{
+    boost::system::error_category const & bt = boost::system::generic_category();
+    std::error_category const & st = bt;
+
+    BOOST_TEST_CSTR_EQ( bt.name(), st.name() );
+
+    int ev = ENOENT;
+
+    BOOST_TEST_EQ( bt.message( ev ), st.message( ev ) );
+
+    {
+        boost::system::error_code bc( ev, bt );
+
+        BOOST_TEST_EQ( bc.value(), ev );
+        BOOST_TEST_EQ( &bc.category(), &bt );
+
+        std::error_code sc( bc );
+
+        BOOST_TEST_EQ( sc.value(), ev );
+        BOOST_TEST_EQ( &sc.category(), &st );
+    }
+
+    {
+        boost::system::error_condition bn = bt.default_error_condition( ev );
+
+        BOOST_TEST_EQ( bn.value(), ev );
+        BOOST_TEST_EQ( &bn.category(), &bt );
+
+        BOOST_TEST( bt.equivalent( ev, bn ) );
+
+        std::error_condition sn( bn );
+
+        BOOST_TEST_EQ( sn.value(), ev );
+        BOOST_TEST_EQ( &sn.category(), &st );
+
+        BOOST_TEST( st.equivalent( ev, sn ) );
+    }
+}
+
+static void test_system_category()
+{
+    boost::system::error_category const & bt = boost::system::system_category();
+    std::error_category const & st = bt;
+
+    BOOST_TEST_CSTR_EQ( bt.name(), st.name() );
+
+    {
+        int ev = 5;
+        BOOST_TEST_EQ( bt.message( ev ), st.message( ev ) );
+
+        {
+            boost::system::error_code bc( ev, bt );
+
+            BOOST_TEST_EQ( bc.value(), ev );
+            BOOST_TEST_EQ( &bc.category(), &bt );
+
+            std::error_code sc( bc );
+
+            BOOST_TEST_EQ( sc.value(), ev );
+            BOOST_TEST_EQ( &sc.category(), &st );
+        }
+
+        {
+            boost::system::error_condition bn = bt.default_error_condition( ev );
+            BOOST_TEST( bt.equivalent( ev, bn ) );
+
+            std::error_condition sn( bn );
+            BOOST_TEST( st.equivalent( ev, sn ) );
+        }
+    }
+
+    {
+        int ev = 4;
+        BOOST_TEST_EQ( bt.message( ev ), st.message( ev ) );
+
+        {
+            boost::system::error_code bc( ev, bt );
+
+            BOOST_TEST_EQ( bc.value(), ev );
+            BOOST_TEST_EQ( &bc.category(), &bt );
+
+            std::error_code sc( bc );
+
+            BOOST_TEST_EQ( sc.value(), ev );
+            BOOST_TEST_EQ( &sc.category(), &st );
+        }
+
+        {
+            boost::system::error_condition bn = bt.default_error_condition( ev );
+            BOOST_TEST( bt.equivalent( ev, bn ) );
+
+            std::error_condition sn( bn );
+            BOOST_TEST( st.equivalent( ev, sn ) );
+        }
+    }
+}
+
+// test_user_category
+
+class user_category_impl: public boost::system::error_category
+{
+public:
+
+    virtual const char * name() const BOOST_NOEXCEPT
+    {
+        return "user";
+    }
+
+    virtual std::string message( int ev ) const
+    {
+        char buffer[ 256 ];
+        std::sprintf( buffer, "user message %d", ev );
+
+        return buffer;
+    }
+
+    virtual boost::system::error_condition default_error_condition( int ev ) const BOOST_NOEXCEPT
+    {
+        if( ev == 4 )
+        {
+            return boost::system::error_condition( EMFILE, boost::system::generic_category() );
+        }
+        else if( ev == 5 )
+        {
+            return boost::system::error_condition( EACCES, boost::system::generic_category() );
+        }
+        else
+        {
+            return boost::system::error_condition( ev, *this );
+        }
+    }
+
+    virtual bool equivalent( int code, const boost::system::error_condition & condition ) const BOOST_NOEXCEPT
+    {
+        if( code == 4 && condition == make_error_condition( boost::system::errc::too_many_files_open_in_system ) )
+        {
+            return true;
+        }
+
+        if( code == 4 && condition == make_error_condition( boost::system::errc::too_many_files_open ) )
+        {
+            return true;
+        }
+
+        return default_error_condition( code ) == condition;
+    }
+
+    // virtual bool equivalent( const error_code & code, int condition ) const BOOST_NOEXCEPT;
+};
+
+boost::system::error_category const & user_category()
+{
+    static user_category_impl cat_;
+    return cat_;
+}
+
+static void test_user_category()
+{
+    boost::system::error_category const & bt = user_category();
+    std::error_category const & st = bt;
+
+    BOOST_TEST_CSTR_EQ( bt.name(), st.name() );
+
+    {
+        int ev = 5;
+        BOOST_TEST_EQ( bt.message( ev ), st.message( ev ) );
+
+        {
+            boost::system::error_code bc( ev, bt );
+
+            BOOST_TEST_EQ( bc.value(), ev );
+            BOOST_TEST_EQ( &bc.category(), &bt );
+
+            std::error_code sc( bc );
+
+            BOOST_TEST_EQ( sc.value(), ev );
+            BOOST_TEST_EQ( &sc.category(), &st );
+        }
+
+        {
+            boost::system::error_condition bn = bt.default_error_condition( ev );
+            BOOST_TEST( bt.equivalent( ev, bn ) );
+
+            std::error_condition sn( bn );
+            BOOST_TEST( st.equivalent( ev, sn ) );
+        }
+    }
+
+    {
+        int ev = 4;
+        BOOST_TEST_EQ( bt.message( ev ), st.message( ev ) );
+
+        {
+            boost::system::error_code bc( ev, bt );
+
+            BOOST_TEST_EQ( bc.value(), ev );
+            BOOST_TEST_EQ( &bc.category(), &bt );
+
+            std::error_code sc( bc );
+
+            BOOST_TEST_EQ( sc.value(), ev );
+            BOOST_TEST_EQ( &sc.category(), &st );
+        }
+
+        {
+            boost::system::error_condition bn = bt.default_error_condition( ev );
+            BOOST_TEST( bt.equivalent( ev, bn ) );
+
+            std::error_condition sn( bn );
+            BOOST_TEST( st.equivalent( ev, sn ) );
+        }
+
+        {
+            boost::system::error_condition bn = make_error_condition( boost::system::errc::too_many_files_open_in_system );
+            BOOST_TEST( bt.equivalent( ev, bn ) );
+
+            std::error_condition sn( bn );
+            BOOST_TEST( st.equivalent( ev, sn ) );
+        }
+
+        {
+            boost::system::error_condition bn = make_error_condition( boost::system::errc::too_many_files_open );
+            BOOST_TEST( bt.equivalent( ev, bn ) );
+
+            std::error_condition sn( bn );
+            BOOST_TEST( st.equivalent( ev, sn ) );
+        }
+    }
+}
+
+// test_user2_category
+
+enum user2_errc
+{
+    my_enoent = 1,
+    my_einval,
+    my_other
+};
+
+class user2_category_impl: public boost::system::error_category
+{
+public:
+
+    virtual const char * name() const BOOST_NOEXCEPT
+    {
+        return "user2";
+    }
+
+    virtual std::string message( int ev ) const
+    {
+        char buffer[ 256 ];
+        std::sprintf( buffer, "user2 message %d", ev );
+
+        return buffer;
+    }
+
+    virtual boost::system::error_condition default_error_condition( int ev ) const BOOST_NOEXCEPT
+    {
+        return boost::system::error_condition( ev, *this );
+    }
+
+    virtual bool equivalent( int code, const boost::system::error_condition & condition ) const BOOST_NOEXCEPT
+    {
+        return default_error_condition( code ) == condition;
+    }
+
+    virtual bool equivalent( const boost::system::error_code & code, int condition ) const BOOST_NOEXCEPT
+    {
+        if( code.category() == *this )
+        {
+            return condition == code.value();
+        }
+        else if( condition == my_enoent )
+        {
+            return code == boost::system::errc::no_such_file_or_directory;
+        }
+        else if( condition == my_einval )
+        {
+            return code == boost::system::errc::invalid_argument;
+        }
+        else
+        {
+            return false;
+        }
+    }
+};
+
+boost::system::error_category const & user2_category()
+{
+    static user2_category_impl cat_;
+    return cat_;
+}
+
+static void test_user2_category()
+{
+    boost::system::error_category const & bt = user2_category();
+    std::error_category const & st = bt;
+
+    int ev = my_enoent;
+
+    boost::system::error_condition bn( ev, bt );
+
+    BOOST_TEST_EQ( bn.value(), ev );
+    BOOST_TEST_EQ( &bn.category(), &bt );
+
+    boost::system::error_code bc = make_error_code( boost::system::errc::no_such_file_or_directory );
+
+    BOOST_TEST( bc == bn );
+
+    std::error_condition sn( bn );
+
+    BOOST_TEST_EQ( sn.value(), ev );
+    BOOST_TEST_EQ( &sn.category(), &st );
+
+    std::error_code sc( bc );
+
+    BOOST_TEST( sc == sn );
+}
+
+//
+
+int main()
+{
+    std::cout
+      << "The version of the C++ standard library being used"
+      " supports header <system_error> so interoperation will be tested.\n";
+    test_generic_category();
+    test_system_category();
+    test_user_category();
+    test_user2_category();
+
+    return boost::report_errors();
+}
+
+#endif

test/std_mismatch_test.cpp

@@ -0,0 +1,63 @@
+
+// Copyright 2017 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 library home page at http://www.boost.org/libs/system
+
+// Avoid spurious VC++ warnings
+# define _CRT_SECURE_NO_WARNINGS
+
+#include <boost/config.hpp>
+#include <iostream>
+
+#if defined(BOOST_NO_CXX11_HDR_SYSTEM_ERROR)
+
+int main()
+{
+  std::cout
+    << "The version of the C++ standard library being used does not"
+    " support header <system_error> so interoperation will not be tested.\n";
+}
+
+#else
+
+#include <boost/system/error_code.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <system_error>
+#include <cerrno>
+#include <string>
+#include <cstdio>
+
+static void test_generic_category()
+{
+    boost::system::error_category const & bt = boost::system::generic_category();
+    std::error_category const & st = bt;
+
+    BOOST_TEST_CSTR_EQ( bt.name(), st.name() );
+}
+
+static void test_system_category()
+{
+    boost::system::error_category const & bt = boost::system::system_category();
+    std::error_category const & st = bt;
+
+    BOOST_TEST_CSTR_EQ( bt.name(), st.name() );
+}
+
+int main()
+{
+    std::cout
+      << "The version of the C++ standard library being used"
+      " supports header <system_error> so interoperation will be tested.\n";
+
+    test_generic_category();
+    test_system_category();
+
+    return boost::report_errors();
+}
+
+#endif

test/system/system.sln

@@ -1,40 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Express 2013 for Windows Desktop
-VisualStudioVersion = 12.0.30626.0
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "system-dll", "system-dll\system-dll.vcxproj", "{419402D4-F990-4B05-A459-655E2DC33DC2}"
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "error_code_test", "error_code_test\error_code_test.vcxproj", "{E50C14DC-547D-4C33-83EA-653C0D0D4E64}"
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "header_only_test", "header_only_test\header_only_test.vcxproj", "{3773451B-A618-4A26-A7F2-85554F4BD21B}"
-EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "config_test", "config_test\config_test.vcxproj", "{E18C2B56-DCEC-438F-9C38-3C8B08B65247}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Win32 = Debug|Win32
-		Release|Win32 = Release|Win32
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{419402D4-F990-4B05-A459-655E2DC33DC2}.Debug|Win32.ActiveCfg = Debug|Win32
-		{419402D4-F990-4B05-A459-655E2DC33DC2}.Debug|Win32.Build.0 = Debug|Win32
-		{419402D4-F990-4B05-A459-655E2DC33DC2}.Release|Win32.ActiveCfg = Release|Win32
-		{419402D4-F990-4B05-A459-655E2DC33DC2}.Release|Win32.Build.0 = Release|Win32
-		{E50C14DC-547D-4C33-83EA-653C0D0D4E64}.Debug|Win32.ActiveCfg = Debug|Win32
-		{E50C14DC-547D-4C33-83EA-653C0D0D4E64}.Debug|Win32.Build.0 = Debug|Win32
-		{E50C14DC-547D-4C33-83EA-653C0D0D4E64}.Release|Win32.ActiveCfg = Release|Win32
-		{E50C14DC-547D-4C33-83EA-653C0D0D4E64}.Release|Win32.Build.0 = Release|Win32
-		{3773451B-A618-4A26-A7F2-85554F4BD21B}.Debug|Win32.ActiveCfg = Debug|Win32
-		{3773451B-A618-4A26-A7F2-85554F4BD21B}.Debug|Win32.Build.0 = Debug|Win32
-		{3773451B-A618-4A26-A7F2-85554F4BD21B}.Release|Win32.ActiveCfg = Release|Win32
-		{3773451B-A618-4A26-A7F2-85554F4BD21B}.Release|Win32.Build.0 = Release|Win32
-		{E18C2B56-DCEC-438F-9C38-3C8B08B65247}.Debug|Win32.ActiveCfg = Debug|Win32
-		{E18C2B56-DCEC-438F-9C38-3C8B08B65247}.Debug|Win32.Build.0 = Debug|Win32
-		{E18C2B56-DCEC-438F-9C38-3C8B08B65247}.Release|Win32.ActiveCfg = Release|Win32
-		{E18C2B56-DCEC-438F-9C38-3C8B08B65247}.Release|Win32.Build.0 = Release|Win32
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-EndGlobal

test/system_error_test.cpp

@@ -9,9 +9,6 @@
 
 //----------------------------------------------------------------------------// 
 
-//  test without deprecated features
-#define BOOST_SYSTEM_NO_DEPRECATED
-
 #include <boost/config/warning_disable.hpp>
 
 #include <boost/detail/lightweight_test.hpp>

test/throws_assign_fail.cpp

@@ -0,0 +1,28 @@
+
+// Copyright 2018 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+
+#include <boost/system/error_code.hpp>
+
+using namespace boost::system;
+
+static void f( error_code & ec )
+{
+    ec = error_code();
+}
+
+#if defined(_WIN32)
+# include <windows.h> // SetErrorMode
+#endif
+
+int main()
+{
+#if defined(_WIN32)
+
+    SetErrorMode( SetErrorMode( 0 ) | SEM_NOGPFAULTERRORBOX );
+
+#endif
+
+    // this should crash
+    f( boost::throws() );
+}