Fix wrong null character stripping for FormatMessage (Nikita Kniazev)

system_error_test: Increase tested messages range (Nikita Kniazev)
Merge pull request #40 from Kojoley/system_error_test-mingw-non-en
2025-12-25 08:18:05 +01:00 · 2019-03-24 01:59:23 +02:00 · 2019-03-24 00:24:05 +02:00 · 2019-03-17 11:28:45 +02:00 · 2019-03-17 01:53:37 +03:00 · 2019-03-16 19:51:21 +02:00
29 changed files with 1488 additions and 1165 deletions
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,4 @@
-# Copyright 2016, 2017, 2018 Peter Dimov
+# Copyright 2016-2019 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)

@@ -6,8 +6,6 @@ language: cpp

 sudo: false

-python: "2.7"
-
 branches:
  only:
    - master
@@ -109,7 +107,7 @@ matrix:

    - os: linux
      compiler: g++-8
-      env: TOOLSET=gcc COMPILER=g++-8 CXXSTD=03,11,14,17
+      env: TOOLSET=gcc COMPILER=g++-8 CXXSTD=03,11,14,17,2a
      addons:
        apt:
          packages:
@@ -320,6 +318,17 @@ matrix:
            - ubuntu-toolchain-r-test
            - llvm-toolchain-trusty-6.0

+    - os: linux
+      compiler: clang++-7
+      env: TOOLSET=clang COMPILER=clang++-7 CXXSTD=03,11,14,17,2a
+      addons:
+        apt:
+          packages:
+            - clang-7
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-trusty-7
+
    - os: linux
      compiler: clang++-6.0
      env: UBSAN=1 TOOLSET=clang COMPILER=clang++-6.0 CXXSTD=03,11,14,1z UBSAN_OPTIONS=print_stacktrace=1
@@ -352,13 +361,20 @@ matrix:
      compiler: clang++
      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z

+    - os: linux
+      compiler: g++
+      env: CMAKE_SUBDIR_TEST=1
+      script:
+      - cd libs/system/test/cmake_subdir_test && mkdir __build__ && cd __build__
+      - cmake ..
+      - cmake --build .
+      - cmake --build . --target check
+
 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
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -0,0 +1,20 @@
+# Copyright 2018 Mike Dev
+# 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
+
+# Partial (add_subdirectory only) and experimental CMake support
+# Subject to change; please do not rely on the contents of this file yet
+
+cmake_minimum_required(VERSION 3.5)
+project(BoostSystem LANGUAGES CXX)
+
+add_library(boost_system INTERFACE)
+add_library(Boost::system ALIAS boost_system)
+
+target_include_directories(boost_system INTERFACE include)
+
+target_link_libraries(boost_system
+    INTERFACE
+        Boost::config
+        Boost::winapi
+)
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -46,10 +46,8 @@ install:
  - 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
+  - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\system\
  - python tools/boostdep/depinst/depinst.py system
  - cmd /c bootstrap
  - b2 -d0 headers
--- a/build/Jamfile.v2
+++ b/build/Jamfile.v2
@@ -22,4 +22,4 @@ lib boost_system
     <link>static:<define>BOOST_SYSTEM_STATIC_LINK=1
   ;

-boost-install boost_system ;
+boost-install boost_system ;
--- a/doc/.gitignore
+++ b/doc/.gitignore
@@ -0,0 +1,2 @@
+/html/
+/pdf/
--- a/doc/Jamfile
+++ b/doc/Jamfile
@@ -0,0 +1,23 @@
+# Copyright 2017, 2018 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)
+
+import asciidoctor ;
+
+html system.html : system.adoc ;
+
+install html_ : system.html : <location>html ;
+
+pdf system.pdf : system.adoc ;
+explicit system.pdf ;
+
+install pdf_ : system.pdf : <location>pdf ;
+explicit pdf_ ;
+
+###############################################################################
+alias boostdoc ;
+explicit boostdoc ;
+alias boostrelease : html_ ;
+explicit boostrelease ;
--- a/doc/index.html
+++ b/doc/index.html
@@ -1,163 +0,0 @@
-<html>
-
-<head>
-<meta http-equiv="Content-Language" content="en-us">
-<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
-<meta name="ProgId" content="FrontPage.Editor.Document">
-<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
-<title>Boost System Library</title>
-<link rel="stylesheet" type="text/css" href="../../../doc/src/minimal.css">
-</head>
-
-<body>
-
-<table border="0" cellpadding="5" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111">
-  <tr>
-    <td width="277">
-<a href="../../../index.html">
-<img src="../../../boost.png" alt="boost.png (6897 bytes)" align="middle" width="277" height="86" border="0"></a></td>
-    <td width="337" align="middle">
-    <font size="7">System Library</font>
-    </td>
-  </tr>
-</table>
-
-<table border="0" cellpadding="5" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" bgcolor="#D7EEFF" width="100%">
-  <tr>
-    <td><a href="../../../index.htm">Boost Home</a>&nbsp;&nbsp;&nbsp; <a href="index.html">
-    Library Home</a>&nbsp;&nbsp; Tutorial&nbsp;&nbsp; <a href="reference.html">
-    Reference</a></td>
-  </tr>
-</table>
-
-<table border="1" cellpadding="5" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" align="right">
-  <tr>
-    <td width="100%" bgcolor="#D7EEFF" align="center">
-      <i><b>Contents</b></i></td>
-  </tr>
-  <tr>
-    <td width="100%" bgcolor="#E8F5FF">
-      <a href="#Introduction">Introduction</a><br>
-      <a href="#Release_History">Release History</a><br>
-      <a href="#Design_Rationale">Design Rationale</a><br>
-      <a href="#History">History</a><br>
-      <a href="#Acknowledgements">Acknowledgements</a>
-    </td>
-  </tr>
-  <tr>
-    <td width="100%" bgcolor="#D7EEFF" align="center">
-      <b><i>Headers</i></b></td>
-  </tr>
-  <tr>
-    <td width="100%" bgcolor="#E8F5FF">
-      <a href="reference.html#Header-error_code">&lt;boost/system/error_code.hpp&gt;</a><br>
-      <a href="reference.html#Header-system_error">
-      &lt;boost/system/system_error.hpp&gt;</a><br>
-      <a href="../../../boost/system/cygwin_error.hpp">
-      &lt;boost/system/cygwin_error.hpp&gt;</a><br>
-      <a href="../../../boost/system/linux_error.hpp">
-      &lt;boost/system/linux_error.hpp&gt;</a><br>
-      <a href="../../../boost/system/windows_error.hpp">
-      &lt;boost/system/windows_error.hpp&gt;</a></td>
-  </tr>
-</table>
-
-<h2><a name="Introduction">Introduction</a></h2>
-
-<p>Error conditions originating from the operating system or other low-level 
-application program interfaces (API's) are typically reported via an integer 
-representing an error code. When these low-level API calls are wrapped in 
-portable code, such as in a portable library, some users want to deal with the 
-error codes in portable ways. Other users need to get at the system specific 
-error codes, so they can deal with system specific needs. The Boost System 
-library provides simple, light-weight <a href="reference.html#Class-error_code">
-error_code</a> objects that encapsulate system-specific error code values, yet 
-also provide access to more abstract and portable error conditions via
-<a href="reference.html#Class-error_condition">error_condition</a> objects. 
-Because error_code objects can represent errors from sources other than the 
-operating system, including user-defined sources, each error_code and 
-error_condition has an associated <a href="reference.html#Class-error_category">
-error_category</a>.</p>
-
-<p>An exception class,&nbsp; <a href="reference.html#Class-system_error">
-system_error</a>, is provided. Derived from std::runtime_error, it captures the 
-underlying error_code for the problem causing the exception so that this 
-important information is not lost.</p>
-<p>While exceptions are the preferred C++ default error code reporting 
-mechanism, users of libraries dependent on low-level API's&nbsp;often need overloads 
-reporting error conditions via error code arguments and/or return values rather 
-than via throwing exceptions. Otherwise, when errors are not exceptional 
-occurrences and must be dealt with as they arise, programs become littered with 
-try/catch blocks, unreadable, and very inefficient. The Boost System library 
-supports both error reporting by exception and by error code.</p>
-<p>In addition to portable errors codes and conditions supported by the <code>
-error_code.hpp</code> header, system-specific headers support the Cygwin, Linux, 
-and Windows platforms. These headers are effectively no-ops if included for 
-platforms other than their intended target.</p>
-<table border="1" cellpadding="10" cellspacing="1" style="border-collapse: collapse" bordercolor="#111111">
-  <tr>
-    <td>The Boost System Library is part of the C++11 Standard Library. 
-    A number of changes, particularly to names, were made by the C++ committee 
-    during standardization. The Boost implementation is tracking those changes. 
-    See <a href="reference.html#Deprecated-names">Deprecated names</a> for 
-    synonyms provided to prevent breakage of existing user code. See
-    <a href="reference.html#Breaking-changes">Breaking changes</a> for changes 
-    that unavoidably break existing user code. All breaking changes are noisy 
-    and will cause compile-time errors.</td>
-  </tr>
-</table>
-<h2><a name="Release_History">Release History</a></h2>
-<p><code>system-2014-06-02</code>: First modular Boost release. Minor 
-maintenance changes.</p>
-<h2><a name="Design_Rationale">Design Rationale</a></h2>
-<p>Class <code>error_code</code>&nbsp; and <code>error_condition</code> are designed as a value types so 
-they can be copied 
-without slicing and do not requiring heap allocation, but still have polymorphic 
-behavior based on the error category. This is achieved by abstract base class
-<code>error_category</code> supplying the polymorphic behavior, and <code>
-error_code</code> and <code>error_condition</code> containing a pointer to an object of a type derived from <code>
-error_category</code>.</p>
-<p>Many of the detailed design decisions were driven by the requirements that 
-users to be able to add additional error categories, and that it be no more 
-difficult to write portable code than system-specific code.</p>
-<p>The <code>operator&lt;&lt;</code> overload for <code>error_code</code> eliminates a 
-misleading conversion to bool in code like <code>cout &lt;&lt; ec</code>, where <code>
-ec</code> is of type <code>error_code</code>. It is also useful in its own 
-right.</p>
-<h2><a name="History">History</a></h2>
-<p><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1975.html">
-N1975</a>, Filesystem Library Proposal for TR2, accepted for Library Technical 
-Report 2 (TR2) at the Berlin meeting, included additional components to 
-supplement the Standard Library's Diagnostics clause. Since then, these error 
-reporting components have received wider public scrutiny and enhancements have 
-been made to the design. The enhanced version has been used by N2054, Networking 
-Library Proposal for TR2, demonstrating that these error reporting components 
-are useful beyond the original Filesystem Library.</p>
-<p>The original proposal viewed error categories as a binary choice between
-<code>errno</code> (i.e. POSIX-style) and the native operating system's error 
-codes. The proposed components now allow as many additional error categories as 
-are needed by either implementations or by users. The need to support additional 
-error categories, for example, occurs in some networking library implementations 
-because they are built on top of the POSIX <code>getaddrinfo</code> API that 
-uses error codes not based on <code>errno</code>.</p>
-<h2><a name="Acknowledgements">Acknowledgements</a></h2>
-<p>Christopher Kohlhoff and Peter Dimov made important contributions to the 
-design. Comments and suggestions were also received from Pavel Vozenilek, 
-Gennaro Prota, Dave Abrahams, Jeff Garland, Iain Hanson, Oliver Kowalke, and 
-Oleg Abrosimov. Christopher Kohlhoff suggested several improvements to the N2066 
-paper. Johan Nilsson's comments led to several of the refinements in N2066 .</p>
-<hr>
-
-<p>Revised 
-<!--webbot bot="Timestamp" S-Type="EDITED" S-Format="%B %d, %Y" startspan -->June 02, 2014<!--webbot bot="Timestamp" endspan i-checksum="13984" --> </font>
-</p>
-
-<p><EFBFBD> Copyright Beman Dawes, 1999</p>
-
-<p>Distributed under the Boost Software License, Version 1.0.
-(See file <a href="../../../LICENSE_1_0.txt">LICENSE_1_0.txt</a>
-or&nbsp; <a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a>) </p>
-
-</body>
-
-</html>
--- a/doc/reference.html
+++ b/doc/reference.html
@@ -1,834 +0,0 @@
-<html>
-
-<head>
-<meta http-equiv="Content-Language" content="en-us">
-<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
-<meta name="ProgId" content="FrontPage.Editor.Document">
-<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
-<title>System Library Reference</title>
-<link rel="stylesheet" type="text/css" href="../../../doc/src/minimal.css">
-</head>
-
-<body>
-
-<table border="0" cellpadding="5" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="637">
-  <tr>
-    <td width="277">
-<a href="../../../index.htm">
-<img src="../../../boost.png" alt="boost.png (6897 bytes)" align="middle" width="277" height="86" border="0"></a></td>
-    <td width="337" align="middle">
-    <font size="7">System Library</font>
-    </td>
-  </tr>
-</table>
-
-<table border="0" cellpadding="5" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" bgcolor="#D7EEFF" width="100%">
-  <tr>
-    <td><a href="../../../index.htm">Boost Home</a>&nbsp;&nbsp;&nbsp; <a href="index.html">
-    Library Home</a>&nbsp;&nbsp; Tutorial&nbsp;&nbsp; <a href="reference.html">
-    Reference</a></td>
-  </tr>
-</table>
-
-<table border="1" cellpadding="5" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" align="right">
-  <tr>
-    <td width="100%" bgcolor="#D7EEFF" align="center">
-      <i><b>Contents</b></i></td>
-  </tr>
-  <tr>
-    <td width="100%" bgcolor="#E8F5FF">
-      <a href="#Introduction">Introduction</a><br>
-      <a href="#C++11">C++11</a><br>
-      <a href="#Macros">Macros</a><br>
-      <a href="#Deprecated-names">Deprecated names</a><br>
-      <a href="#Breaking-changes">Breaking changes</a><br>
-      <a href="#Header-error_code">Header &lt;boost/system/error_code.hpp&gt;</a><br>
-      <a href="#Class-error_category">Class <code>error_category</code></a><br>
-      &nbsp;&nbsp;&nbsp;<a href="#Class-error_category-synopsis">Class <code>error_category</code> synopsis</a><br>
-      &nbsp;&nbsp;&nbsp;<a href="#Class-error_category-virtual-members">Class <code>error_category</code> virtual members</a><br>
-      &nbsp;&nbsp;&nbsp;<a href="#Class-error_category-non-virtual-members">Class <code>error_category</code> non-virtual members</a><br>
-&nbsp;&nbsp; <a href="#Class-error_category-non-member-functions">Class <code>error_category</code> 
-      non-member functions</a><br>
-      &nbsp;&nbsp;&nbsp;<a href="#Class-error_category-predefined-objects">Class <code>error_category</code> predefined objects</a><br>
-      <a href="#Class-error_code">Class <code>error_code</code></a><br>
-      &nbsp;&nbsp;&nbsp;<a href="#Class-error_code-synopsis">Class <code>error_code</code> synopsis</a><br>
-      &nbsp;&nbsp;&nbsp;<a href="#Class-error_code-constructors">Class <code>error_code</code> constructors</a><br>
-      &nbsp;&nbsp;&nbsp;<a href="#Class-error_code-modifiers">Class <code>error_code</code> modifiers</a><br>
-      &nbsp;&nbsp;&nbsp;<a href="#Class-error_code-observers">Class <code>error_code</code> observers</a><br>
-      <a href="#Class-error_condition">Class <code>error_condition</code></a><br>
-      &nbsp;&nbsp;&nbsp;<a href="#Class-error_condition-synopsis">Class <code>error_condition</code> synopsis</a><br>
-      &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="#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>
-    </td>
-  </tr>
-</table>
-
-<h2><a name="Introduction">Introduction</a></h2>
-
-<p>This reference documentation describes components that&nbsp;programs may use to report error conditions originating from the operating 
-system or other low-level application program interfaces.</p>
-<p>Boost.System library components never change the value of <code>
-errno</code>.</p>
-<h2><a name="C++11">C++11</a></h2>
-<p>The library is documented to use several C++11 features, including <code>
-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 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>
-    <td height="16"><b><i>Macro Name</i></b></td>
-    <td height="16"><b><i>Default</i></b></td>
-    <td height="16"><b><i>Effect if defined</i></b></td>
-  </tr>
-  <tr>
-    <td valign="top" height="64"><code>BOOST_ERROR_CODE_HEADER_ONLY</code></td>
-    <td valign="top" height="64">Not defined.</td>
-    <td valign="top" height="64">The implementation is header-only, and the 
-    Boost.System library is not built. Overrides other link and library macros.</td>
-  </tr>
-  <tr>
-    <td valign="top" height="64"><code>BOOST_SYSTEM_DYN_LINK</code></td>
-    <td valign="top" height="64">Defined if <code>BOOST_ALL_DYN_LINK</code> is defined, 
-    otherwise not defined.</td>
-    <td valign="top" height="64">Boost.System library is dynamically linked. If not defined, 
-    static linking is assumed.</td>
-  </tr>
-  <tr>
-    <td valign="top" height="47"><code>BOOST_SYSTEM_NO_LIB</code></td>
-    <td valign="top" height="47">Defined if <code>BOOST_ALL_NO_LIB</code> is defined, 
-    otherwise not defined.</td>
-    <td valign="top" height="47">Boost.System library does not use the Boost auto-link 
-    facility.</td>
-  </tr>
-  <tr>
-    <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 provided for compatibility.</td>
-  </tr>
-  </table>
-<h2><a name="Deprecated-names">Deprecated names</a></h2>
-<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>
-    <td><b><i>Replacement</i></b></td>
-  </tr>
-  <tr>
-    <td><code>get_generic_category()</code></td>
-    <td><code>generic_category()</code></td>
-  </tr>
-  <tr>
-    <td><code>get_system_category()</code></td>
-    <td><code>system_category()</code></td>
-  </tr>
-  <tr>
-    <td><code>namespace posix</code></td>
-    <td><code>namespace errc</code></td>
-  </tr>
-  <tr>
-    <td><code>namespace posix_error</code></td>
-    <td><code>namespace errc</code></td>
-  </tr>
-  <tr>
-    <td><code>enum posix_errno</code></td>
-    <td><code>enum errc_t</code></td>
-  </tr>
-  <tr>
-    <td><code>get_posix_category()</code></td>
-    <td><code>generic_category()</code></td>
-  </tr>
-  <tr>
-    <td><code>posix_category</code></td>
-    <td><code>generic_category()</code></td>
-  </tr>
-  <tr>
-    <td><code>errno_ecat</code></td>
-    <td><code>generic_category()</code></td>
-  </tr>
-  <tr>
-    <td><code>native_ecat</code></td>
-    <td><code>system_category()</code></td>
-  </tr>
-</table>
-<h2><a name="Breaking-changes">Breaking changes</a></h2>
-<p>Two static consts are replaced by functions. These are breaking changes best 
-fixed by globally adding () to these names to turn them into function calls.</p>
-<table border="1" cellpadding="5" cellspacing="1" style="border-collapse: collapse" bordercolor="#111111">
-  <tr>
-    <td><b><i>Old usage, now broken</i></b></td>
-    <td><b><i>Replacement</i></b></td>
-  </tr>
-  <tr>
-    <td><code>generic_category</code></td>
-    <td><code>generic_category()</code></td>
-  </tr>
-  <tr>
-    <td><code>system_category</code></td>
-    <td><code>system_category()</code></td>
-  </tr>
-  </table>
-<p>User-defined BOOST_POSIX_API and BOOST_WINDOWS_API macros are no longer supported.</p>
-<h2><a name="Header-error_code">Header &lt;boost/system/error_code.hpp&gt;</a></h2>
-<h3>&lt;boost/system/error_code.hpp&gt; synopsis</h3>
-<blockquote>
-<pre>namespace boost
-{
-  namespace system
-  {
-    class <a href="#Class-error_category">error_category</a>;
-    const error_category &amp;  <a href="#system_category">system_category</a>() noexcept;
-    const error_category &amp;  <a href="#generic_category">generic_category</a>() noexcept;
-
-    class <a href="#Class-error_code">error_code</a>;
-    class <a href="#Class-error_condition">error_condition</a>;
-
-    //  "Concept" helpers
-    template< class T="" >
-      struct is_error_code_enum { static const bool value = false; };
-
-    template< class T="" >
-      struct is_error_condition_enum { static const bool value = false; };
-
-    //  generic error_conditions
-    namespace errc
-    {
-      enum errc_t
-      {
-        success = 0,
-        address_family_not_supported,   //EAFNOSUPPORT
-        address_in_use,                 //EADDRINUSE
-        address_not_available,          //EADDRNOTAVAIL
-        already_connected,              //EISCONN
-        argument_list_too_long,         //E2BIG
-        argument_out_of_domain,         //EDOM
-        bad_address,                    //EFAULT
-        bad_file_descriptor,            //EBADF
-        bad_message,                    //EBADMSG
-        broken_pipe,                    //EPIPE
-        connection_aborted,             //ECONNABORTED
-        connection_already_in_progress, //EALREADY
-        connection_refused,             //ECONNREFUSED
-        connection_reset,               //ECONNRESET
-        cross_device_link,              //EXDEV
-        destination_address_required,   //EDESTADDRREQ
-        device_or_resource_busy,        //EBUSY
-        directory_not_empty,            //ENOTEMPTY
-        executable_format_error,        //ENOEXEC
-        file_exists,                    //EEXIST
-        file_too_large,                 //EFBIG
-        filename_too_long,              //ENAMETOOLONG
-        function_not_supported,         //ENOSYS
-        host_unreachable,               //EHOSTUNREACH
-        identifier_removed,             //EIDRM
-        illegal_byte_sequence,          //EILSEQ
-        inappropriate_io_control_operation,//ENOTTY
-        interrupted,                    //EINTR
-        invalid_argument,               //EINVAL
-        invalid_seek,                   //ESPIPE
-        io_error,                       //EIO
-        is_a_directory,                 //EISDIR
-        message_size,                   //EMSGSIZE
-        network_down,                   //ENETDOWN
-        network_reset,                  //ENETRESET
-        network_unreachable,            //ENETUNREACH
-        no_buffer_space,                //ENOBUFS
-        no_child_process,               //ECHILD
-        no_link,                        //ENOLINK
-        no_lock_available,              //ENOLCK
-        no_message_available,           //ENODATA
-        no_message,                     //ENOMSG
-        no_protocol_option,             //ENOPROTOOPT
-        no_space_on_device,             //ENOSPC
-        no_stream_resources,            //ENOSR
-        no_such_device_or_address,      //ENXIO
-        no_such_device,                 //ENODEV
-        no_such_file_or_directory,      //ENOENT
-        no_such_process,                //ESRCH
-        not_a_directory,                //ENOTDIR
-        not_a_socket,                   //ENOTSOCK
-        not_a_stream,                   //ENOSTR
-        not_connected,                  //ENOTCONN
-        not_enough_memory,              //ENOMEM
-        not_supported,                  //ENOTSUP
-        operation_canceled,             //ECANCELED
-        operation_in_progress,          //EINPROGRESS
-        operation_not_permitted,        //EPERM
-        operation_not_supported,        //EOPNOTSUPP
-        operation_would_block,          //EWOULDBLOCK
-        owner_dead,                     //EOWNERDEAD
-        permission_denied,              //EACCES
-        protocol_error,                 //EPROTO
-        protocol_not_supported,         //EPROTONOSUPPORT
-        read_only_file_system,          //EROFS
-        resource_deadlock_would_occur,  //EDEADLK
-        resource_unavailable_try_again, //EAGAIN
-        result_out_of_range,            //ERANGE
-        state_not_recoverable,          //ENOTRECOVERABLE
-        stream_timeout,                 //ETIME
-        text_file_busy,                 //ETXTBSY
-        timed_out,                      //ETIMEDOUT
-        too_many_files_open_in_system,  //ENFILE
-        too_many_files_open,            //EMFILE
-        too_many_links,                 //EMLINK
-        too_many_synbolic_link_levels,  //ELOOP
-        value_too_large,                //EOVERFLOW
-        wrong_protocol_type             //EPROTOTYPE
-      };
-
-    } // namespace errc
-
-    template<> struct is_error_condition_enum<posix::posix_errno>&lt;errc::errc_t&gt;
-      { static const bool value = true; };
-
-    //  <a href="#Non-member-functions">non-member functions</a>
-
-    bool operator==( const error_code &amp; lhs, const error_code &amp; rhs ) noexcept;
-    bool operator==( const error_code &amp; code, const error_condition &amp; condition ) noexcept;
-    bool operator==( const error_condition &amp; condition, const error_code &amp; code ) noexcept;
-    bool operator==( const error_condition &amp; lhs, const error_condition &amp; rhs ) noexcept;
-
-    bool operator!=( const error_code &amp; lhs, const error_code &amp; rhs ) noexcept;
-    bool operator!=( const error_code &amp; code, const error_condition &amp; condition ) noexcept;
-    bool operator!=( const error_condition &amp; condition, const error_code &amp; code ) noexcept;
-    bool operator!=( const error_condition &amp; lhs, const error_condition &amp; rhs ) noexcept;
-
-    bool operator&lt;( const error_code &amp; lhs, const error_code &amp; rhs ) noexcept;
-    bool operator&lt;( const error_condition &amp; lhs, const error_condition &amp; rhs ) noexcept;
-
-    error_code make_error_code( errc::errc_t e ) noexcept;
-    error_condition make_error_condition( errc::errc_t e ) noexcept;
-
-    template &lt;class charT, class traits&gt;
-      std::basic_ostream&lt;charT,traits&gt;&amp;
-        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 );
-
-  } // 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>
-<p>Users may specialize <code>is_error_code_enum</code> and <code>
-is_error_condition_enum</code> templates to indicate that a type is eligible for 
-class <code>error_code</code> and <code>error_condition</code> automatic 
-conversions respectively.</p>
-
-<pre>const error_category &amp; <a name="system_category">system_category</a>();</pre>
-<blockquote>
-  <p><i>Returns:</i> A reference to a <code>error_category</code> object 
-  identifying errors originating from the operating system.</p>
-</blockquote>
-<pre>const error_category &amp; <a name="generic_category">generic_category</a>();</pre>
-<blockquote>
-  <p><i>Returns:</i> A reference to a <code>error_category</code> object 
-  identifying portable error conditions.</p>
-</blockquote>
-
-<h2><a name="Class-error_category">Class <code>error_category</code></a></h2>
-<p>The class <code>error_category</code> defines the base class for types used 
-to identify the source and encoding of a particular category of error code.</p>
-<p><i>[Note:</i> Classes may be derived from <code>error_category</code> 
-to support additional categories of errors. <i>--end note]</i></p>
-<p>The class <code>error_category</code> serves as a base class for types used 
-to identify the source and encoding of a particular category of error code. 
-Classes may be derived from <code>error_category</code> to support categories of 
-errors in addition to those defined in the Boost System library. Such classes 
-shall behave as specified in this subclause. [<i> Note:</i> <code>error_category</code> 
-objects are passed by reference, and two such objects are equal if they have the 
-same address. This means that applications using custom <code>error_category</code> 
-types should create a single object of each such type. <i><EFBFBD>end note</i> ]</p>
-<h3><a name="Class-error_category-synopsis">Class <code>error_category</code> synopsis</a></h3>
-<blockquote>
-<pre>namespace boost
-{
-  namespace system
-  {
-    class error_category : public noncopyable
-    {
-    public:
-      virtual ~error_category();
-
-      virtual const char *     name() const noexcept = 0;
-      virtual string           message( int ev ) const = 0;
-      virtual error_condition  default_error_condition( int ev ) const noexcept;
-      virtual bool             equivalent( int code, const error_condition &amp; condition )
-                                 const noexcept;
-      virtual bool             equivalent( const error_code &amp; code, int condition ) const noexcept;
-
-      bool operator==( const error_category &amp; rhs ) const noexcept;
-      bool operator!=( const error_category &amp; rhs ) const noexcept;
-      bool operator&lt; ( const error_category &amp; rhs ) const noexcept;
-    };
-  }
-}</pre>
-</blockquote>
-<h3><a name="Class-error_category-virtual-members">Class <code>error_category</code> virtual members</a></h3>
-<p>Classes derived from <code>error_category</code> shall behave as specified in 
-this subclause.</p>
-<pre>virtual const char * name() const noexcept =0;</pre>
-<blockquote>
-  <p><i>Returns: </i>a string naming the error category.</p>
-</blockquote>
-<pre>virtual string message( int ev ) const noexcept =0;</pre>
-<blockquote>
-  <p><i>Returns:</i> A string that describes the error denoted by
-  <code>ev</code>.</p>
-</blockquote>
-<pre>virtual error_condition default_error_condition( int ev ) const noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i>&nbsp; <code>error_condition( ev, *this )</code>.</p>
-  <blockquote>
-    <p dir="ltr">&nbsp;[<i>--Note:</i> Derived classes will typically convert <code>ev</code> 
-    to some portable <code>error_category</code>, such as <code>generic_category()</code>, 
-    and return it as an <code>error_condition</code> for that category. <i>--end 
-    note</i>]</p>
-  </blockquote>
-  </blockquote>
-<pre>virtual bool equivalent( int code, const error_condition &amp; condition ) const noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>default_error_condition( code ) == condition</code>.</p>
-  </blockquote>
-<pre>virtual bool equivalent( const error_code &amp; code, int condition ) const noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>*this == code.category() &amp;&amp; code.value() == condition</code>.</p>
-  </blockquote>
-<h3><a name="Class-error_category-non-virtual-members">Class <code>error_category</code> non-virtual members</a></h3>
-<pre>bool operator==( const error_category &amp; rhs ) const noexcept;</pre>
-<blockquote>
-<p><i>Returns:</i> <code>this == &amp;rhs</code>.</p>
-</blockquote>
-<pre>bool operator!=( const error_category &amp; rhs ) const noexcept;</pre>
-<blockquote>
-<p><i>Returns:</i> <code>this != &amp;rhs</code>.</p>
-</blockquote>
-
-<pre>bool operator&lt;( const error_category &amp; rhs ) const noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>std::less&lt;const error_category*&gt;()( this, &amp;rhs&nbsp; 
-  noexcept)</code>.</p>
-  <blockquote>
-    <p><i>[Note:</i> <code>std::less</code> provides a total ordering for 
-    pointers. <i>--end note]</i></p>
-  </blockquote>
-</blockquote>
-<h2><a name="Class-error_code">Class <code>
-error_code</code></a></h2>
-<p>The class <code>error_code</code> describes an object used to hold error code 
-values, such as those originating from the operating<br>
-system or other low-level application program interfaces. <i>[ Note: </i>Class
-<code>error_code</code> is an adjunct to error reporting by<br>
-exception. <i><EFBFBD>end note ]</i></p>
-<h3><a name="Class-error_code-synopsis">Class <code>
-error_code</code> synopsis</a></h3>
-<blockquote>
-<pre>namespace boost
-{
-  namespace system
-  {
-    class error_code {
-    public:
-
-      // constructors:
-      error_code() noexcept;
-      error_code( val, const error_category &amp; cat ) noexcept;
-      template &lt;class <code>ErrorCodeEnum</code>&gt;
-        error_code(<code> ErrorCodeEnum</code> e ) noexcept;
-
-      // modifiers:
-      void assign( int val, const error_category &amp; cat ) noexcept;
-      template&lt;typename <code>ErrorCodeEnum</code>&gt;
-        error_code &amp; operator=( <code>ErrorCodeEnum</code> val ) noexcept;
-      void clear() noexcept;
-
-      // observers:
-      int                    value() const noexcept;
-      cont error_category &amp;  category() const noexcept;
-      error_condition        default_error_condition() const noexcept;
-      string                 message() const;
-      operator unspecified-bool-type() const;
-
-    private:
-      int val_;                     // <i>exposition only</i>
-      const error_category * cat_;  // <i>exposition only</i>
-    };
-  }
-}</pre>
-</blockquote>
-<h3><a name="Class-error_code-constructors">Class <code>
-error_code</code> constructors</a></h3>
-<pre>error_code() noexcept;</pre>
-<blockquote>
-  <p><i>Effects: </i>Constructs an object of type <code>error_code</code>.</p>
-  <p><i>Postconditions:</i> <code>val_ == 0 &amp;&amp; cat_ == &amp;system_category()</code>.</p>
-</blockquote>
-<pre>error_code( int val, const error_category &amp; cat ) noexcept;</pre>
-<blockquote>
-  <p><i>Effects: </i>Constructs an object of type <code>error_code</code>.</p>
-  <p><i>Postconditions:</i> <code>val_ == val &amp;&amp; cat_ == &amp;cat</code>.</p>
-</blockquote>
-<pre>template &lt;class <code>ErrorCodeEnum</code>&gt;
-  error_code(<code> ErrorCodeEnum</code> val ) noexcept;</pre>
-<blockquote>
-  <p><i>Effects: </i>Constructs an object of type <code>error_code</code>.</p>
-  <p><i>Postconditions:</i> <code>*this == make_error_code( val )</code>.</p>
-  <p><i>Remarks:</i> This constructor shall not participate in overload 
-  resolution unless <code>is_error_code_enum&lt;ErrorCodeEnum&gt;::value</code> is
-  <code>true</code>.</p>
-</blockquote>
-<h3><a name="Class-error_code-modifiers">Class <code>
-error_code</code> modifiers</a></h3>
-<pre>void assign( int val, const error_category &amp; cat ) noexcept;</pre>
-<blockquote>
-  <p><i>Postconditions:</i> <code>val_ == val &amp;&amp; cat_ == &amp;cat</code>.</p>
-</blockquote>
-<pre>template&lt;typename <code>ErrorCodeEnum</code>&gt;
-  error_code &amp; operator=( <code>ErrorCodeEnum</code> val ) noexcept;</pre>
-<blockquote>
-  <p><i>Postconditions:</i> <code>*this == make_error_code( val )</code>.</p>
-  <p><i>Remarks:</i> This operator shall not participate in overload resolution 
-  unless <code>is_error_code_enum&lt;ErrorCodeEnum&gt;::value</code> is <code>true</code>.</p>
-</blockquote>
-<pre><code>void clear() noexcept;</code></pre>
-<blockquote>
-  <p><i>postcondition:</i> <code>value() == 0 &amp;&amp; category() == 
-  system_category()</code></p>
-</blockquote>
-  <h3><a name="Class-error_code-observers">Class <code>
-error_code</code> observers</a></h3>
-  <pre><code>int value() const noexcept;</code></pre>
-<blockquote>
-<p><i>Returns:</i> <code>val_</code>.</p>
-  </blockquote>
-<pre><code>const error_category &amp; category() const noexcept;</code></pre>
-<blockquote>
-<p><i>Returns:</i> <code>*cat_</code>.</p>
-  </blockquote>
-  <pre>error_condition default_error_condition() const noexcept;</pre>
-<blockquote>
-<p><i>Returns:</i>&nbsp; <code>category().default_error_condition( value())</code>.</p>
-</blockquote>
-  <pre><code>string message() const;</code></pre>
-<blockquote>
-<p><i>Returns:</i>&nbsp; <code>category().message( value())</code>.</p>
-  <p><i>Throws:</i> Nothing.</p>
-</blockquote>
-<pre>operator unspecified-bool-type() const;</pre>
-<blockquote>
-<p><i>Returns:</i> if <code>value() != 0</code>, returns a value that will evaluate
-<code>true</code> in a boolean context; otherwise, returns a value that will 
-evaluate <code>false</code> in a boolean context. The value type returned shall 
-not be convertible to <code>int</code>.</p>
-<p><i>Throws:</i> nothing.</p>
-<p><i>[Note: </i>This conversion can be used in contexts where a <code>bool</code> 
-is expected ( e.g., an <code>if</code> condition ); however, implicit conversions 
-( e.g., to <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></p>
-</blockquote>
-<h2><a name="Class-error_condition">Class <code>error_condition</code></a></h2>
-<p>The class <code>error_condition</code> describes an object used to hold 
-values identifying error conditions. <i>[ Note: </i><code>error_condition</code> 
-values are portable abstractions, while <code>error_code</code> values are 
-implementation specific. <i>--end note ]</i></p>
-<h3><a name="Class-error_condition-synopsis">Class <code>error_condition</code> synopsis</a></h3>
-<blockquote>
-<pre>namespace boost
-{
-  namespace system
-  {
-    class error_condition
-    {
-    public:
-
-      // constructors:
-      error_condition() noexcept;
-      error_condition( int val, const error_category &amp; cat ) noexcept;
-      template &lt;class ErrorConditionEnum&gt;
-        error_condition( errorConditionEnum val ) noexcept;
-
-      // modifiers:
-      void assign( int val, const error_category &amp; cat ) noexcept;
-      template&lt;typename ErrorConditionEnum&gt;
-        error_condition &amp; operator=( ErrorConditionEnum val ) noexcept;
-      void clear() noexcept;
-
-      // observers:
-      int value() const noexcept;
-      const error_category &amp; category() const noexcept;
-      string message() const;
-      operator unspecified-bool-type () const noexcept;
-
-    private:
-      int val_;                      // <i>exposition only</i>
-      const error_category * cat_;   // <i>exposition only</i>
-    };
-  }
-}</pre>
-</blockquote>
-<h3><a name="Class-error_condition-constructors">Class <code>error_condition</code> 
-constructors</a></h3>
-<pre>error_condition() noexcept; </pre>
-<blockquote>
-  <p><i>Effects:</i> Constructs an object of type <code>error_condition</code>.</p>
-  <p><i>Postconditions:</i> <code>val_ == 0 and cat_ == &amp;generic_category()</code>.</p>
-</blockquote>
-<pre>error_condition( int val, const error_category &amp; cat ) noexcept;</pre>
-<blockquote>
-  <p><i>Effects: </i>Constructs an object of type error_condition.</p>
-  <p><i>Postconditions:</i> <code>val_ == val and cat_ == &amp;cat</code>.</p>
-</blockquote>
-<pre>template &lt;class ErrorConditionEnum&gt;
-  error_condition( ErrorConditionEnum e ) noexcept;</pre>
-<blockquote>
-  <p><i>Effects:</i> Constructs an object of type <code>error_condition</code>.</p>
-  <p><i>Postconditions:</i> <code>*this == make_error_condition(e)</code>.</p>
-  <p><i>Remarks:</i> This constructor shall not participate in overload 
-  resolution unless <code>is_error_condition_enum&lt;ErrorConditionEnum&gt;::value</code> 
-  is <code>true</code>.</p>
-</blockquote>
-<h3><a name="Class-error_condition-modifiers">Class <code>error_condition</code> 
-modifiers</a></h3>
-<pre>void assign( int val, const error_category &amp; cat ) noexcept; </pre>
-<blockquote>
-  <p><i>Postconditions:</i> <code>val_ == val and cat_ == &amp;cat</code>. </p>
-</blockquote>
-<pre>template&lt;typename ErrorConditionEnum&gt;
-  error_condition &amp; operator=( ErrorConditionEnum e ) noexcept;</pre>
-<blockquote>
-  <p><i>Postconditions:</i> <code>*this == make_error_condition( e )</code>.</p>
-  <p><i>Returns:</i> <code>*this</code>.</p>
-  <p><i>Remarks:</i> This operator shall not participate in overload resolution 
-  unless <code>is_error_condition_enum&lt;ErrorConditionEnum&gt;::value</code> is
-  <code>true</code>.</p>
-</blockquote>
-<pre>void clear() noexcept;</pre>
-<blockquote>
-  <p><i>Postcondition:</i> <code>value() == 0 &amp;&amp; category() == generic_category()</code></p>
-</blockquote>
-<h3><a name="Class-error_condition-observers">Class <code>error_condition</code> 
-observers</a></h3>
-<pre>int value() const noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>val_</code>.</p>
-</blockquote>
-<pre>const error_category &amp; category() const noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>*cat_</code>.</p>
-</blockquote>
-<pre>string message() const;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>category().message( value() )</code>.</p>
-</blockquote>
-<pre>operator unspecified-bool-type () const;</pre>
-<blockquote>
-  <p><i>Returns: </i>If <code>value() != 0</code>, returns a value that will 
-  evaluate <code>true</code> in a boolean context; otherwise, returns a value 
-  that will evaluate <code>false</code>. The return type shall not be 
-  convertible to <code>int</code>. </p>
-  <p><i>Throws:</i> Nothing.</p>
-  <p><i>&nbsp;[ Note:</i> This conversion can be used in contexts where a <code>bool</code> 
-  is expected ( e.g., an if condition ); however, implicit conversions ( e.g., to
-  <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="Non-member-functions">Non-member functions</a></h2>
-  <pre>bool operator==( const error_code &amp; lhs, const error_code &amp; rhs ) noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>lhs.category() == rhs.category() &amp;&amp; lhs.value() == 
-  rhs.value()</code>.</p>
-</blockquote>
-<pre>bool operator==( const error_code &amp; code, const error_condition &amp; condition ) noexcept;
-bool operator==( const error_condition &amp; condition, const error_code &amp; code ) noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>code.category().equivalent( code.value(), condition )<br>
-  || condition.category().equivalent( code, condition.value() )</code>.</p>
-</blockquote>
-<pre>bool operator==( const error_condition &amp; lhs, const error_condition &amp; rhs ) noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>lhs.category() == rhs.category() &amp;&amp; lhs.value() == 
-  rhs.value()</code>.</p>
-</blockquote>
-<pre>bool operator!=( const error_code &amp; lhs, const error_code &amp; rhs ) noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>!(lhs == rhs )</code>.</p>
-</blockquote>
-<pre>bool operator!=( const error_code &amp; code, const error_condition &amp; condition ) noexcept;
-bool operator!=( const error_condition &amp; condition, const error_code &amp; code ) noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i><code> !( code ==&nbsp; condition )</code>.</p>
-</blockquote>
-<pre>bool operator!=( const error_condition &amp; lhs, const error_condition &amp; rhs ) noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>!(lhs == rhs )</code>.</p>
-</blockquote>
-<pre>bool operator&lt;( const error_code &amp; lhs, const error_code &amp; rhs ) noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>lhs.category() &lt; rhs.category()<br>
-  &nbsp; || (lhs.category() == rhs.category() &amp;&amp; lhs.value() &lt; rhs.value())</code>.</p>
-</blockquote>
-<pre>bool operator&lt;( const error_condition &amp; lhs, const error_condition &amp; rhs ) noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>lhs.category() &lt; rhs.category()<br>
-  &nbsp; || (lhs.category() == rhs.category() &amp;&amp; lhs.value() &lt; rhs.value())</code>.</p>
-</blockquote>
-<pre>error_code make_error_code( errc::errc_t e ) noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>error_code( e, generic_category())</code>.</p>
-</blockquote>
-<pre>error_condition make_error_condition( errc::errc_t e ) noexcept;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>error_condition( static_cast&lt;int&gt;( e ), generic_category())</code>.</p>
-</blockquote>
-
-<pre>template &lt;class charT, class traits&gt;
-  std::basic_ostream&lt;charT,traits&gt;&amp;
-    operator&lt;&lt;( basic_ostream&lt;charT,traits&gt;&amp; os, const error_code &amp; ec );</pre>
-<blockquote>
-<p><i>Effects:</i> <code>os &lt;&lt; ec.category().name() &lt;&lt; ':' &lt;&lt; ec.value()</code>.</p>
-<p><i>Returns:</i> <code>os</code>.</p>
-</blockquote>
-<pre>size_t <a name="hash_value">hash_value</a>( const error_code &amp; ec );</pre>
-<blockquote>
-  <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>
-system_error</code></a></h3>
-<p>The class <code>system_error</code> describes an exception object used to 
-report errors that have an associated <code><a href="#Class-error_code">error_code</a></code>. Such errors typically originate from operating system or other low-level 
-application program interfaces.</p>
-<blockquote>
-<pre>namespace boost
-{
-  namespace system
-  {
-    class system_error : public std::runtime_error
-    {
-    public:
-      system_error( error_code ec );
-      system_error( error_code ec, const char * what_arg );
-      system_error( error_code ec, const std::string &amp; what_arg );
-      system_error( int ev, const error_category &amp; ecat,
-                    const char * what_arg );
-      system_error( int ev, const error_category &amp; ecat,
-                    const std::string &amp; what_arg );
-      system_error( int ev, const error_category &amp; ecat);
-
-      const error_code &amp; code() const throw();
-      const char *       what() const throw();
-    };
-  }
-}</pre>
-</blockquote>
-<pre>system_error( error_code ec );</pre>
-<blockquote>
-  <p><i>Effects:</i> Constructs an object of class <code>system_error</code>.</p>
-  <p><i>Postcondition:</i> <code>code() == ec <br>
-&nbsp; &amp;&amp; std::strcmp( this-&gt;runtime_error::what(), &quot;&quot; ) == 0</code></p>
-</blockquote>
-<pre>system_error( error_code ec, const char * what_arg );</pre>
-<blockquote>
-  <p><i>Effects:</i> Constructs an object of class <code>system_error</code>.</p>
-  <p><i>Postcondition:</i> <code>code() == ec <br>
-&nbsp; &amp;&amp; std::strcmp( this-&gt;runtime_error::what(), what_arg ) == 0</code></p>
-</blockquote>
-<pre>system_error( error_code ec, const std::string &amp; what_arg );</pre>
-<blockquote>
-  <p><i>Effects:</i> Constructs an object of class <code>system_error</code>.</p>
-  <p><i>Postcondition:</i> <code>code() == ec <br>
-&nbsp; &amp;&amp; std::strcmp( this-&gt;runtime_error::what(), what_arg.c_str() ) == 0</code></p>
-</blockquote>
-<pre>system_error( int ev, const error_category &amp; ecat,
-             const char * what_arg );</pre>
-<blockquote>
-  <p><i>Effects:</i> Constructs an object of class <code>system_error</code>.</p>
-  <p><i>Postcondition:</i> <code>code() == error_code( ev, ecat )<br>
-&nbsp; &amp;&amp; std::strcmp( this-&gt;runtime_error::what(), what_arg ) == 0</code></p>
-</blockquote>
-<pre>system_error( int ev, const error_category &amp; ecat,
-             const std::string &amp; what_arg );</pre>
-<blockquote>
-  <p><i>Effects:</i> Constructs an object of class <code>system_error</code>.</p>
-  <p><i>Postcondition:</i> <code>code() == error_code( ev, ecat )<br>
-&nbsp; &amp;&amp; std::strcmp( this-&gt;runtime_error::what(), what_arg.c_str() ) == 0</code></p>
-</blockquote>
-<pre>system_error( int ev, const error_category &amp; ecat );</pre>
-<blockquote>
-  <p><i>Effects:</i> Constructs an object of class <code>system_error</code>.</p>
-  <p><i>Postcondition:</i> <code>code() == error_code( ev, ecat )<br>
-&nbsp; &amp;&amp; std::strcmp( this-&gt;runtime_error::what(), &quot;&quot; ) == 0</code></p>
-</blockquote>
-<pre>const error_code &amp; code() const;</pre>
-<blockquote>
-  <p><i>Returns:</i> <code>ec</code> or <code>error_code( ev, ecat )</code>, from 
-  the constructor, as appropriate.</p>
-</blockquote>
-<pre>const char * what() const;</pre>
-<blockquote>
-  <p><i>Returns: </i>A string incorporating <code>
-  this-&gt;runtime_error::what()</code> and <code>
-  code.message()</code>.</p>
-</blockquote>
-<hr>
-
-<p>Revised 
-<!--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>
-
-<p>Distributed under the Boost Software License, Version 1.0. See
-<a href="http://www.boost.org/LICENSE_1_0.txt">www.boost.org/LICENSE_1_0.txt</a></p>
-
-</body>
-
-</html>
--- a/doc/system-docinfo-footer.html
+++ b/doc/system-docinfo-footer.html
@@ -0,0 +1,5 @@
+<style>
+
+*:not(pre)>code { background: none; color: #600000; }
+
+</style>
--- a/doc/system.adoc
+++ b/doc/system.adoc
@@ -0,0 +1,27 @@
+////
+Copyright 2018 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
+////
+
+# Boost.System: Extensible Error Reporting
+Beman Dawes, Christopher Kohlhoff, Peter Dimov
+:toc: left
+:toclevels: 3
+:idprefix:
+:docinfo: private-footer
+
+:leveloffset: +1
+
+include::system/introduction.adoc[]
+include::system/changes.adoc[]
+include::system/rationale.adoc[]
+include::system/reference.adoc[]
+include::system/history.adoc[]
+include::system/acknowledgements.adoc[]
+include::system/copyright.adoc[]
+
+:leveloffset: -1
--- a/doc/system/acknowledgements.adoc
+++ b/doc/system/acknowledgements.adoc
@@ -0,0 +1,19 @@
+////
+Copyright 2003-2017 Beman Dawes
+
+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
+////
+
+[#acknowledgments]
+# Acknowledgments
+:idprefix: ack_
+
+Christopher Kohlhoff and Peter Dimov made important contributions to the
+design. Comments and suggestions were also received from Pavel Vozenilek,
+Gennaro Prota, Dave Abrahams, Jeff Garland, Iain Hanson, Oliver Kowalke, and
+Oleg Abrosimov. Christopher Kohlhoff suggested several improvements to the
+http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2066.html[N2066]
+paper. Johan Nilsson's comments led to several of the refinements in N2066.
--- a/doc/system/changes.adoc
+++ b/doc/system/changes.adoc
@@ -0,0 +1,62 @@
+////
+Copyright 2018 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
+////
+
+[#changes]
+# Release History
+:idprefix:
+
+## Changes in Boost 1.69
+
+* Boost.System is now header-only. A stub library is still built for
+  compatibility, but linking to it is no longer necessary.
+* Even more functions have been marked `constexpr`.
+* The destructor of `error_category` is now protected and no longer
+  virtual. This is a _potentially breaking change_ but its impact
+  is expected to be limited.
+* `error_category` now has a constructor that accepts a 64 bit identifier,
+  enabling distinct category objects to compare equal.
+* The constructors of `error_category` are now protected.
+* A non-allocating, nonthrowing overload of `message` has been added.
+* A virtual function `failed` has been added, allowing categories for
+  which success is not synonymous with 0.
+* The deprecated `boost::system::throws` object has been removed.
+* `boost::throws()` is now deprecated and its use is discouraged.
+* The constructor of `system_error` taking a single `error_code` argument
+  is now explicit.
+* `system_error::code()` now returns by value.
+
+## Changes in Boost 1.68
+
+On a {cpp}14 compiler, many Boost.System functions and member functions
+are now `constexpr`, and `error_code` and `error_condition` are literal
+classes.
+
+In addition to enabling use in constant expressions (and `constexpr`
+functions), this significantly improves the quality of the generated code.
+
+As a result of this change, however, now using Boost.System from {cpp}14
+or {cpp}17 code requires that the library be also built with {cpp}14 or
+above. This is the default on GCC 6 and newer, but not on GCC 5 or Clang.
+One can build Boost for {cpp}14 by passing the `cxxstd=14` option to `b2`.
+
+(Previous versions allowed code built against any {cpp} standard to link
+with Boost.System built against any {cpp} standard. In 1.68, code using
+any {cpp} standard can link with Boost.System built with {cpp}14 or above,
+but if Boost.System is built with {cpp}11 or below, only code also built
+with {cpp}11 and below can link to it successfully.)
+
+## Changes in Boost 1.65
+
+On a {cpp}11 compiler, Boost.System now provides implicit conversions
+from `boost::system::error_category`, `error_code`, and `error_condition`
+to their standard equivalents from `<system_error>`.
+
+This allows libraries to expose a {cpp}11 interface and report errors
+via `std::error_code` even when using Boost.System, directly or through a
+dependency such as Boost.ASIO.
--- a/doc/system/copyright.adoc
+++ b/doc/system/copyright.adoc
@@ -0,0 +1,19 @@
+////
+Copyright 2018 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
+////
+
+[#copyright]
+# Copyright and License
+:idprefix:
+
+This documentation is
+
+* Copyright 2003-2017 Beman Dawes
+* Copyright 2018 Peter Dimov
+
+and is distributed under the http://www.boost.org/LICENSE_1_0.txt[Boost Software License, Version 1.0].
--- a/doc/system/history.adoc
+++ b/doc/system/history.adoc
@@ -0,0 +1,30 @@
+////
+Copyright 2003-2017 Beman Dawes
+
+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
+////
+
+[#history]
+# History
+:idprefix: history_
+
+http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1975.html[N1975],
+Filesystem Library Proposal for TR2, accepted for Library Technical
+Report 2 (TR2) at the Berlin meeting, included additional components to
+supplement the Standard Library's Diagnostics clause. Since then, these error
+reporting components have received wider public scrutiny and enhancements have
+been made to the design. The enhanced version has been used by
+http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2054.pdf[N2054],
+Networking  Library Proposal for TR2, demonstrating that these error reporting
+components are useful beyond the original Filesystem Library.
+
+The original proposal viewed error categories as a binary choice between
+`errno` (i.e. POSIX-style) and the native operating system's error
+codes. The proposed components now allow as many additional error categories as
+are needed by either implementations or by users. The need to support additional
+error categories, for example, occurs in some networking library implementations
+because they are built on top of the POSIX `getaddrinfo` API that
+uses error codes not based on `errno`.
--- a/doc/system/introduction.adoc
+++ b/doc/system/introduction.adoc
@@ -0,0 +1,50 @@
+////
+Copyright 2003-2017 Beman Dawes
+Copyright 2018 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
+////
+
+[#introduction]
+# Introduction
+:idprefix: intro_
+
+Error conditions originating from the operating system or other low-level
+application program interfaces (API's) are typically reported via an integer
+representing an error code. When these low-level API calls are wrapped in
+portable code, such as in a portable library, some users want to deal with the
+error codes in portable ways. Other users need to get at the system specific
+error codes, so they can deal with system specific needs. The Boost System
+library provides simple, light-weight `error_code` objects that encapsulate
+system-specific error code values, yet also provide access to more abstract
+and portable error conditions via `error_condition` objects.
+
+Because `error_code` objects can represent errors from sources other than the
+operating system, including user-defined sources, each `error_code` and
+`error_condition` has an associated `error_category`.
+
+An exception class, `system_error`, is provided. Derived from
+`std::runtime_error`, it captures the underlying `error_code` for the problem
+causing the exception so that this important information is not lost.
+
+While exceptions are the preferred {cpp} default error code reporting
+mechanism, users of libraries dependent on low-level API's often need overloads
+reporting error conditions via error code arguments and/or return values rather
+than via throwing exceptions. Otherwise, when errors are not exceptional
+occurrences and must be dealt with as they arise, programs become littered with
+try/catch blocks, unreadable, and inefficient. The Boost System library
+supports both error reporting by exception and by error code.
+
+In addition to portable errors codes and conditions supported by the
+`error_code.hpp` header, system-specific headers support the Cygwin, Linux,
+and Windows platforms. These headers are effectively no-ops if included for
+platforms other than their intended target.
+
+Boost.System is part of the {cpp}11 Standard Library.
+A number of changes, particularly to names, were made by the C++ committee
+during standardization. The Boost implementation has been tracking those changes.
+See <<#ref_deprecated_names,Deprecated Names>> for synonyms provided to prevent
+breakage of existing user code.
--- a/doc/system/rationale.adoc
+++ b/doc/system/rationale.adoc
@@ -0,0 +1,27 @@
+////
+Copyright 2003-2017 Beman Dawes
+
+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
+////
+
+[#rationale]
+# Design Rationale
+:idprefix: rationale_
+
+`error_code` and `error_condition` are designed as value types so
+they can be copied without slicing and do not require heap allocation, but
+still have polymorphic behavior based on the error category. This is achieved
+by abstract base class `error_category` supplying the polymorphic behavior,
+and `error_code` and `error_condition` containing a pointer to an object of a
+type derived from `error_category`.
+
+Many of the detailed design decisions were driven by the requirements that
+users to be able to add additional error categories, and that it be no more
+difficult to write portable code than system-specific code.
+
+The `operator<<` overload for `error_code` eliminates a misleading conversion to
+`bool` in code like `cout << ec`, where `ec` is of type `error_code`. It is also
+useful in its own right.
--- a/doc/system/reference.adoc
+++ b/doc/system/reference.adoc
@@ -0,0 +1,963 @@
+////
+Copyright 2003-2017 Beman Dawes
+Copyright 2018 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
+////
+
+[#reference]
+# Reference
+:idprefix: ref_
+
+## Use of {cpp}11 and {cpp}14 Features
+
+The library is documented to use several {cpp}11 and {cpp}14 features,
+including `noexcept`, explicit conversion operators and `constexpr`. The
+actual implementation uses {cpp}11 and {cpp}14 features only when they are
+available, and otherwise falls back on {cpp}03 features.
+
+## Macros
+
+When `BOOST_SYSTEM_ENABLE_DEPRECATED` is defined, the library provides
+deprecated features for compatibility. These features are bound to eventually
+disappear.
+
+When `BOOST_SYSTEM_USE_UTF8` is defined, on Windows the library returns
+UTF-8 messages using code page `CP_UTF8` instead of the default `CP_ACP`.
+This macro has no effect on POSIX.
+
+## Deprecated Names
+
+In the process of adding Boost.System to the {cpp}11 standard library, the
+{cpp} committee changed some names. To ease transition, Boost.System deprecates
+the old names, but will provide them when the macro `BOOST_SYSTEM_ENABLE_DEPRECATED` is defined.
+
+|===
+|Old usage, now deprecated|Replacement
+
+|`get_generic_category()`|`generic_category()`
+|`get_system_category()`|`system_category()`
+|`namespace posix`|`namespace errc`
+|`namespace posix_error`|`namespace errc`
+|`get_posix_category()`|`generic_category()`
+|`posix_category`|`generic_category()`
+|`errno_ecat`|`generic_category()`
+|`native_ecat`|`system_category()`
+|===
+
+## <boost/system/error_code.hpp>
+
+### Synopsis
+
+```
+namespace boost {
+  namespace system {
+
+    class error_category;
+
+    constexpr const error_category & system_category() noexcept;
+    constexpr const error_category & generic_category() noexcept;
+
+    class error_code;
+    class error_condition;
+
+    // "Concept" helpers
+
+    template<class T>
+      struct is_error_code_enum { static const bool value = false; };
+
+    template<class T>
+      struct is_error_condition_enum { static const bool value = false; };
+
+    // generic error conditions
+
+    namespace errc {
+      enum errc_t
+      {
+        success = 0,
+        address_family_not_supported,   //EAFNOSUPPORT
+        address_in_use,                 //EADDRINUSE
+        address_not_available,          //EADDRNOTAVAIL
+        already_connected,              //EISCONN
+        argument_list_too_long,         //E2BIG
+        argument_out_of_domain,         //EDOM
+        bad_address,                    //EFAULT
+        bad_file_descriptor,            //EBADF
+        bad_message,                    //EBADMSG
+        broken_pipe,                    //EPIPE
+        connection_aborted,             //ECONNABORTED
+        connection_already_in_progress, //EALREADY
+        connection_refused,             //ECONNREFUSED
+        connection_reset,               //ECONNRESET
+        cross_device_link,              //EXDEV
+        destination_address_required,   //EDESTADDRREQ
+        device_or_resource_busy,        //EBUSY
+        directory_not_empty,            //ENOTEMPTY
+        executable_format_error,        //ENOEXEC
+        file_exists,                    //EEXIST
+        file_too_large,                 //EFBIG
+        filename_too_long,              //ENAMETOOLONG
+        function_not_supported,         //ENOSYS
+        host_unreachable,               //EHOSTUNREACH
+        identifier_removed,             //EIDRM
+        illegal_byte_sequence,          //EILSEQ
+        inappropriate_io_control_operation, //ENOTTY
+        interrupted,                    //EINTR
+        invalid_argument,               //EINVAL
+        invalid_seek,                   //ESPIPE
+        io_error,                       //EIO
+        is_a_directory,                 //EISDIR
+        message_size,                   //EMSGSIZE
+        network_down,                   //ENETDOWN
+        network_reset,                  //ENETRESET
+        network_unreachable,            //ENETUNREACH
+        no_buffer_space,                //ENOBUFS
+        no_child_process,               //ECHILD
+        no_link,                        //ENOLINK
+        no_lock_available,              //ENOLCK
+        no_message_available,           //ENODATA
+        no_message,                     //ENOMSG
+        no_protocol_option,             //ENOPROTOOPT
+        no_space_on_device,             //ENOSPC
+        no_stream_resources,            //ENOSR
+        no_such_device_or_address,      //ENXIO
+        no_such_device,                 //ENODEV
+        no_such_file_or_directory,      //ENOENT
+        no_such_process,                //ESRCH
+        not_a_directory,                //ENOTDIR
+        not_a_socket,                   //ENOTSOCK
+        not_a_stream,                   //ENOSTR
+        not_connected,                  //ENOTCONN
+        not_enough_memory,              //ENOMEM
+        not_supported,                  //ENOTSUP
+        operation_canceled,             //ECANCELED
+        operation_in_progress,          //EINPROGRESS
+        operation_not_permitted,        //EPERM
+        operation_not_supported,        //EOPNOTSUPP
+        operation_would_block,          //EWOULDBLOCK
+        owner_dead,                     //EOWNERDEAD
+        permission_denied,              //EACCES
+        protocol_error,                 //EPROTO
+        protocol_not_supported,         //EPROTONOSUPPORT
+        read_only_file_system,          //EROFS
+        resource_deadlock_would_occur,  //EDEADLK
+        resource_unavailable_try_again, //EAGAIN
+        result_out_of_range,            //ERANGE
+        state_not_recoverable,          //ENOTRECOVERABLE
+        stream_timeout,                 //ETIME
+        text_file_busy,                 //ETXTBSY
+        timed_out,                      //ETIMEDOUT
+        too_many_files_open_in_system,  //ENFILE
+        too_many_files_open,            //EMFILE
+        too_many_links,                 //EMLINK
+        too_many_synbolic_link_levels,  //ELOOP
+        value_too_large,                //EOVERFLOW
+        wrong_protocol_type             //EPROTOTYPE
+      };
+
+    } // namespace errc
+
+    template<> struct is_error_condition_enum<errc::errc_t>
+      { static const bool value = true; };
+
+    // non-member functions
+
+    constexpr bool operator==( const error_code & lhs,
+      const error_code & rhs ) noexcept;
+    bool operator==( const error_code & code,
+      const error_condition & condition ) noexcept;
+    bool operator==( const error_condition & condition,
+      const error_code & code ) noexcept;
+    constexpr bool operator==( const error_condition & lhs,
+      const error_condition & rhs ) noexcept;
+
+    constexpr bool operator!=( const error_code & lhs,
+      const error_code & rhs ) noexcept;
+    bool operator!=( const error_code & code,
+      const error_condition & condition ) noexcept;
+    bool operator!=( const error_condition & condition,
+      const error_code & code ) noexcept;
+    constexpr bool operator!=( const error_condition & lhs,
+      const error_condition & rhs ) noexcept;
+
+    constexpr bool operator<( const error_code & lhs,
+      const error_code & rhs ) noexcept;
+    constexpr bool operator<( const error_condition & lhs,
+      const error_condition & rhs ) noexcept;
+
+    constexpr error_code make_error_code( errc::errc_t e ) noexcept;
+    constexpr error_condition make_error_condition( errc::errc_t e ) noexcept;
+
+    template <class charT, class traits>
+      std::basic_ostream<charT, traits>&
+        operator<<( basic_ostream<charT, traits>& os, const error_code & ec );
+
+    std::size_t hash_value( const error_code & ec );
+
+  } // namespace system
+} // namespace boost
+```
+
+The value of each `errc_t` constant is the same as the value of the `<cerrno>`
+macro shown in the above synopsis.
+
+Users may specialize `is_error_code_enum` and `is_error_condition_enum`
+templates to indicate that a type is eligible for class `error_code` and
+`error_condition` automatic conversions respectively.
+
+### Class error_category
+
+The class `error_category` defines the base class for types used
+to identify the source and encoding of a particular category of error code.
+
+Classes may be derived from `error_category` to support categories of
+errors in addition to those defined in Boost.System.
+
+```
+namespace boost {
+  namespace system {
+
+    class error_category
+    {
+    public: // noncopyable
+
+      error_category( error_category const & ) = delete;
+      error_category& operator=( error_category const & ) = delete;
+
+    protected:
+
+      ~error_category() = default;
+
+      constexpr error_category() noexcept;
+      explicit constexpr error_category( unsigned long long id ) noexcept;
+
+    public:
+
+      virtual const char * name() const noexcept = 0;
+
+      virtual error_condition default_error_condition( int ev ) const noexcept;
+
+      virtual bool equivalent( int code, const error_condition & condition )
+        const noexcept;
+      virtual bool equivalent( const error_code & code, int condition )
+        const noexcept;
+
+      virtual std::string message( int ev ) const = 0;
+      virtual char const * message( int ev, char * buffer, std::size_t len )
+        const noexcept;
+
+      virtual bool failed( int ev ) const noexcept;
+
+      constexpr bool operator==( const error_category & rhs ) const noexcept;
+      constexpr bool operator!=( const error_category & rhs ) const noexcept;
+      constexpr bool operator< ( const error_category & rhs ) const noexcept;
+
+      operator std::error_category const & () const;
+
+    private:
+
+      unsigned long long id_; // exposition only
+
+    };
+  }
+}
+```
+
+#### Constructors
+
+```
+constexpr error_category() noexcept;
+```
+[none]
+* {blank}
+
+Effects: :: Initializes `id_` to 0.
+Remarks: :: Since equivalence for categories that do not have an identifier is
+  based on comparing object addresses, a user-defined derived category of type
+  `C` that uses this constructor should ensure that only one object of type `C`
+  exists in the program.
+
+```
+explicit constexpr error_category( unsigned long long id ) noexcept;
+```
+[none]
+* {blank}
+
+Effects: :: Initializes `id_` to `id`.
+Remarks: :: User-defined derived categories that use this constructor are considered
+  equivalent when their identifiers match. Therefore, those categories may have more
+  than one instance existing in a program, but to minimize the possibility of
+  collision, their identifiers must be randomly chosen (at the time the category
+  is implemented, not at runtime). One way of generating a 64 bit random identifier
+  is https://www.random.org/cgi-bin/randbyte?nbytes=8&format=h.
+
+#### Virtuals
+
+```
+virtual const char * name() const noexcept = 0;
+```
+[none]
+* {blank}
+
+Returns: :: In derived classes, a character literal naming the error category.
+
+```
+virtual error_condition default_error_condition( int ev ) const noexcept;
+```
+[none]
+* {blank}
+
+Returns: ::
+- In derived classes, an error condition corresponding to `ev`.
+  The returned error condition will typically come from the generic category.
+- In the default implementation, `error_condition( ev, *this )`.
+
+```
+virtual bool equivalent( int code, const error_condition & condition )
+  const noexcept;
+```
+[none]
+* {blank}
+
+Returns: ::
+- In derived classes, `true` when `error_code( code, *this )` is equivalent to `condition`.
+- In the default implementation, `default_error_condition( code ) == condition`.
+
+```
+virtual bool equivalent( const error_code & code, int condition )
+  const noexcept;
+```
+[none]
+* {blank}
+
+Returns: ::
+- In derived classes, `true` when `code` is equivalent to `error_condition( condition, *this )`.
+- In the default implementation, `*this == code.category() && code.value() == condition`.
+
+```
+virtual std::string message( int ev ) const = 0;
+```
+[none]
+* {blank}
+
+Returns: :: In derived classes, a string that describes the error denoted by `ev`.
+
+```
+virtual char const * message( int ev, char * buffer, std::size_t len )
+  const noexcept;
+```
+[none]
+* {blank}
+
+Effects: ::
+** Derived classes should either
+  *** return a pointer to a character literal describing the error denoted by `ev`, or
+  *** copy a string describing the error into `buffer`, truncating it to `len-1`
+      characters and storing a null terminator, and return `buffer`. If `len` is 0,
+      nothing is copied, but the function still returns `buffer`. Note that
+      when `len` is 0, `buffer` may be `nullptr`.
+** The default implementation calls `message(ev)` and copies the result into
+   `buffer`, truncating it to `len-1` characters and storing a null terminator.
+   If `len` is 0, copies nothing. Returns `buffer`. If `message(ev)` throws an
+   exception, the string `"Message text unavailable"` is used.
+Example: ::
+
+```
+const char* my_category::message(int ev, char* buffer, size_t len) const noexcept
+{
+  switch(ev)
+  {
+  case 0: return "no error";
+  case 1: return "voltage out of range";
+  case 2: return "impedance mismatch";
+  case 31:
+  case 32:
+  case 33:
+    std::snprintf(buffer, len, "component %d failure", ev-30);
+    return buffer;
+  default:
+    std::snprintf(buffer, len, "unknown error %d", ev);
+    return buffer;
+  }
+}
+```
+
+```
+virtual bool failed( int ev ) const noexcept;
+```
+[none]
+* {blank}
+
+Returns: ::
+- In derived classes, `true` when `ev` represents a failure.
+- In the default implementation, `ev != 0`.
+Remarks: ::
+  All calls to this function with the same `ev` must return the same value.
+
+#### Nonvirtuals
+
+```
+constexpr bool operator==( const error_category & rhs ) const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `rhs.id_ == 0? this == &rhs: id_ == rhs.id_`.
+Remarks: :: Two category objects are considered equivalent when they have matching
+  nonzero identifiers, or are the same object.
+
+```
+constexpr bool operator!=( const error_category & rhs ) const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `!( *this == rhs )`.
+
+```
+constexpr bool operator< ( const error_category & rhs ) const noexcept;
+```
+[none]
+* {blank}
+
+Returns: ::
+** If `id_ < rhs.id_`, `true`;
+** Otherwise, if `id_ > rhs.id_`, `false`;
+** Otherwise, if `rhs.id_ != 0`, `false`;
+** Otherwise, `std::less<error_category const *>()( this, &rhs )`.
+
+```
+operator std::error_category const & () const;
+```
+[none]
+* {blank}
+
+Returns: :: A reference to an `std::error_category` object corresponding
+  to `*this`.
+
+### Predefined Categories
+
+```
+constexpr const error_category & system_category() noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: A reference to an `error_category` object identifying errors
+  originating from the operating system.
+
+```
+constexpr const error_category & generic_category() noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: A reference to an `error_category` object identifying portable
+  error conditions.
+
+### Class error_code
+
+The class `error_code` describes an object used to hold error code
+values, such as those originating from the operating system or other
+low-level application program interfaces. It's an adjunct to error reporting
+by exception.
+
+```
+namespace boost {
+  namespace system {
+
+    class error_code {
+    public:
+
+      // constructors:
+
+      constexpr error_code() noexcept;
+      constexpr error_code( int val, const error_category & cat ) noexcept;
+
+      template <class ErrorCodeEnum>
+        constexpr error_code( ErrorCodeEnum e ) noexcept;
+
+      // modifiers:
+
+      constexpr void assign( int val, const error_category & cat ) noexcept;
+
+      template<typename ErrorCodeEnum>
+        constexpr error_code & operator=( ErrorCodeEnum e ) noexcept;
+
+      constexpr void clear() noexcept;
+
+      // observers:
+
+      constexpr int value() const noexcept;
+      constexpr const error_category & category() const noexcept;
+
+      error_condition default_error_condition() const noexcept;
+
+      std::string message() const;
+      char const * message( char * buffer, std::size_t len ) const noexcept;
+
+      constexpr bool failed() const noexcept;
+      constexpr explicit operator bool() const noexcept;
+
+      operator std::error_code() const;
+
+    private: // exposition only
+
+      int val_;
+      const error_category * cat_;
+
+    };
+  }
+}
+```
+
+#### Constructors
+
+```
+constexpr error_code() noexcept;
+```
+[none]
+* {blank}
+
+Ensures: :: `val_ == 0`; `*cat_ == system_category()`.
+
+```
+constexpr error_code( int val, const error_category & cat ) noexcept;
+```
+[none]
+* {blank}
+
+Ensures: :: `val_ == val`; `cat_ == &cat`.
+
+```
+template <class ErrorCodeEnum>
+  constexpr error_code( ErrorCodeEnum e ) noexcept;
+```
+[none]
+* {blank}
+
+Ensures: :: `*this == make_error_code( e )`.
+Remarks: :: This constructor is only enabled when `is_error_code_enum<ErrorCodeEnum>::value` is `true`.
+
+#### Modifiers
+
+```
+constexpr void assign( int val, const error_category & cat ) noexcept;
+```
+[none]
+* {blank}
+
+Ensures: :: `val_ == val`; `cat_ == &cat`.
+
+```
+template<typename ErrorCodeEnum>
+  constexpr error_code & operator=( ErrorCodeEnum e ) noexcept;
+```
+[none]
+* {blank}
+
+Ensures: :: `*this == make_error_code( e )`.
+Remarks: :: This operator is only enabled when `is_error_code_enum<ErrorCodeEnum>::value` is `true`.
+
+```
+constexpr void clear() noexcept;
+```
+[none]
+* {blank}
+
+Ensures: :: `val_ == 0`; `*cat_ == system_category()`.
+
+#### Observers
+
+```
+constexpr int value() const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `val_`.
+
+```
+constexpr const error_category & category() const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `*cat_`.
+
+```
+error_condition default_error_condition() const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `cat_\->default_error_condition( val_ )`.
+
+```
+std::string message() const;
+```
+[none]
+* {blank}
+
+Returns: :: `cat_\->message( val_ )`.
+
+```
+char const * message( char * buffer, std::size_t len ) const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `cat_\->message( val_, buffer, len )`.
+
+```
+constexpr bool failed() const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `cat_\->failed( val_ )`.
+
+```
+constexpr explicit operator bool() const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `val_ != 0`.
+
+```
+operator std::error_code() const;
+```
+[none]
+* {blank}
+
+Returns: :: `std::error_code( val_, *cat_ )`.
+
+### Class error_condition
+
+```
+namespace boost {
+  namespace system {
+
+    class error_condition {
+    public:
+
+      // constructors:
+
+      constexpr error_condition() noexcept;
+      constexpr error_condition( int val, const error_category & cat ) noexcept;
+
+      template <class ErrorConditionEnum>
+        constexpr error_condition( ErrorConditionEnum e ) noexcept;
+
+      // modifiers:
+
+      constexpr void assign( int val, const error_category & cat ) noexcept;
+
+      template<typename ErrorConditionEnum>
+        constexpr error_condition & operator=( ErrorConditionEnum e ) noexcept;
+
+      constexpr void clear() noexcept;
+
+      // observers:
+
+      constexpr int value() const noexcept;
+      constexpr const error_category & category() const noexcept;
+
+      std::string message() const;
+      char const * message( char * buffer, std::size_t len ) const noexcept;
+
+      constexpr bool failed() const noexcept;
+      constexpr explicit operator bool() const noexcept;
+
+      operator std::error_condition() const;
+
+    private: // exposition only
+
+      int val_;
+      const error_category * cat_;
+
+    };
+  }
+}
+```
+
+#### Constructors
+
+```
+constexpr error_condition() noexcept;
+```
+[none]
+* {blank}
+
+Ensures: :: `val_ == 0`; `*cat_ == generic_category()`.
+
+```
+constexpr error_condition( int val, const error_category & cat ) noexcept;
+```
+[none]
+* {blank}
+
+Ensures: :: `val_ == val`; `cat_ == &cat`.
+
+```
+template <class ErrorConditionEnum>
+  constexpr error_condition( ErrorConditionEnum e ) noexcept;
+```
+[none]
+* {blank}
+
+Ensures: :: `*this == make_error_condition( e )`.
+Remarks: :: This constructor is only enabled when `is_error_condition_enum<ErrorConditionEnum>::value` is `true`.
+
+#### Modifiers
+
+```
+constexpr void assign( int val, const error_category & cat ) noexcept;
+```
+[none]
+* {blank}
+
+Ensures: :: `val_ == val`; `cat_ == &cat`.
+
+```
+template <class ErrorConditionEnum>
+  constexpr error_condition & operator=( ErrorConditionEnum e ) noexcept;
+```
+[none]
+* {blank}
+
+Ensures: :: `*this == make_error_condition( e )`.
+Remarks: :: This operator is only enabled when `is_error_condition_enum<ErrorConditionEnum>::value` is `true`.
+
+```
+constexpr void clear() noexcept;
+```
+[none]
+* {blank}
+
+Ensures: :: `val_ == 0`; `*cat_ == generic_category()`.
+
+#### Observers
+
+```
+constexpr int value() const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `val_`.
+
+```
+constexpr const error_category & category() const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `*cat_`.
+
+```
+std::string message() const;
+```
+[none]
+* {blank}
+
+Returns: :: `cat_\->message( val_ )`.
+
+```
+char const * message( char * buffer, std::size_t len ) const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `cat_\->message( val_, buffer, len )`.
+
+```
+constexpr bool failed() const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `cat_\->failed( val_ )`.
+
+```
+constexpr explicit operator bool() const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `val_ != 0`.
+
+```
+operator std::error_condition() const;
+```
+[none]
+* {blank}
+
+Returns: :: `std::error_condition( val_, *cat_ )`.
+
+### Nonmember functions
+
+```
+constexpr bool operator==( const error_code & lhs,
+  const error_code & rhs ) noexcept;
+constexpr bool operator==( const error_condition & lhs,
+  const error_condition & rhs ) noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `lhs.value() == rhs.value() && lhs.category() == rhs.category()`.
+
+```
+bool operator==( const error_code & code,
+  const error_condition & condition ) noexcept;
+bool operator==( const error_condition & condition,
+  const error_code & code ) noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `code.category().equivalent( code.value(), condition ) || condition.category().equivalent( code, condition.value() )`.
+
+```
+constexpr bool operator!=( const error_code & lhs,
+  const error_code & rhs ) noexcept;
+constexpr bool operator!=( const error_condition & lhs,
+  const error_condition & rhs ) noexcept;
+bool operator!=( const error_code & code,
+  const error_condition & condition ) noexcept;
+bool operator!=( const error_condition & condition,
+  const error_code & code ) noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `!( lhs == rhs )`.
+
+```
+constexpr bool operator<( const error_code & lhs,
+  const error_code & rhs ) noexcept;
+constexpr bool operator<( const error_condition & lhs,
+  const error_condition & rhs ) noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `lhs.category() < rhs.category() || ( lhs.category() == rhs.category() && lhs.value() < rhs.value() )`.
+
+```
+constexpr error_code make_error_code( errc::errc_t e ) noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `error_code( e, generic_category() )`.
+
+```
+constexpr error_condition make_error_condition( errc::errc_t e ) noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `error_condition( e, generic_category() )`.
+
+```
+template <class charT, class traits>
+  std::basic_ostream<charT, traits>&
+    operator<<( basic_ostream<charT, traits>& os, const error_code & ec );
+```
+[none]
+* {blank}
+
+Effects: :: `os << ec.category().name() << ':' << ec.value()`.
+Returns: :: `os`.
+
+```
+std::size_t hash_value( const error_code & ec );
+```
+[none]
+* {blank}
+
+Returns: :: A hash value representing `ec`.
+
+## <boost/system/system_error.hpp>
+
+### Class system_error
+
+The class `system_error` describes an exception object used to
+report errors that have an associated `error_code`. Such errors
+typically originate from operating system or other low-level
+application program interfaces.
+
+```
+namespace boost
+{
+  namespace system
+  {
+    class system_error: public std::runtime_error
+    {
+    public:
+
+      explicit system_error( error_code ec );
+      system_error( error_code ec, const char * what_arg );
+      system_error( error_code ec, const std::string & what_arg );
+
+      system_error( int ev, const error_category & ecat );
+      system_error( int ev, const error_category & ecat,
+        const char * what_arg );
+      system_error( int ev, const error_category & ecat,
+        const std::string & what_arg );
+
+      error_code code() const noexcept;
+      const char * what() const noexcept;
+    };
+  }
+}
+```
+
+#### Constructors
+
+```
+explicit system_error( error_code ec );
+system_error( error_code ec, const char * what_arg );
+system_error( error_code ec, const std::string & what_arg );
+```
+[none]
+* {blank}
+
+Ensures: :: `code() == ec`.
+
+```
+system_error( int ev, const error_category & ecat,
+  const char * what_arg );
+system_error( int ev, const error_category & ecat,
+  const std::string & what_arg );
+system_error( int ev, const error_category & ecat );
+```
+[none]
+* {blank}
+
+Ensures: :: `code() == error_code( ev, ecat )`.
+
+#### Observers
+
+```
+error_code code() const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: `ec` or `error_code( ev, ecat )`, from the constructor, as appropriate.
+
+```
+const char * what() const noexcept;
+```
+[none]
+* {blank}
+
+Returns: :: A null-terminated character string incorporating the arguments supplied
+  in the constructor, typically of the form `what_arg + ": " + code.message()`.
--- a/include/boost/system/detail/generic_category.hpp
+++ b/include/boost/system/detail/generic_category.hpp
@@ -50,6 +50,11 @@ inline std::string generic_error_category_message( int ev )
 # if defined( BOOST_MSVC )
 #  pragma warning( push )
 #  pragma warning( disable: 4996 )
+# elif defined(__clang__) && defined(__has_warning)
+#  pragma clang diagnostic push
+#  if __has_warning("-Wdeprecated-declarations")
+#   pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#  endif
 # endif

 inline std::string generic_error_category_message( int ev )
@@ -83,6 +88,8 @@ inline char const * generic_error_category_message( int ev, char * buffer, std::

 # if defined( BOOST_MSVC )
 #  pragma warning( pop )
+# elif defined(__clang__) && defined(__has_warning)
+#  pragma clang diagnostic pop
 # endif

 #endif
--- a/include/boost/system/detail/system_category_win32.hpp
+++ b/include/boost/system/detail/system_category_win32.hpp
@@ -55,6 +55,19 @@ inline char const * unknown_message_win32( int ev, char * buffer, std::size_t le

 #endif

+inline boost::winapi::UINT_ message_cp_win32()
+{
+#if defined(BOOST_SYSTEM_USE_UTF8)
+
+    return boost::winapi::CP_UTF8_;
+
+#else
+
+    return boost::winapi::CP_ACP_;
+
+#endif
+}
+
 inline char const * system_category_message_win32( int ev, char * buffer, std::size_t len ) BOOST_NOEXCEPT
 {
    if( len == 0 )
@@ -68,42 +81,60 @@ inline char const * system_category_message_win32( int ev, char * buffer, std::s
        return buffer;
    }

-#if defined(__GNUC__)
-# define BOOST_SYSTEM_ALLOCA __builtin_alloca
-#else
-# define BOOST_SYSTEM_ALLOCA _alloca
+    boost::winapi::UINT_ const code_page = message_cp_win32();
+
+    int r = 0;
+
+#if !defined(BOOST_NO_ANSI_APIS)
+
+    if( code_page == boost::winapi::CP_ACP_ )
+    {
+        using namespace boost::winapi;
+
+        DWORD_ retval = boost::winapi::FormatMessageA(
+            FORMAT_MESSAGE_FROM_SYSTEM_ | FORMAT_MESSAGE_IGNORE_INSERTS_,
+            NULL,
+            ev,
+            MAKELANGID_( LANG_NEUTRAL_, SUBLANG_DEFAULT_ ), // Default language
+            buffer,
+            static_cast<DWORD_>( len ),
+            NULL
+        );
+
+        r = static_cast<int>( retval );
+    }
+    else
+
 #endif

-    wchar_t * wbuffer = static_cast<wchar_t*>( BOOST_SYSTEM_ALLOCA( len * sizeof( wchar_t ) ) );
-
-#undef BOOST_SYSTEM_ALLOCA
-
-    using namespace boost::winapi;
-
-    DWORD_ retval = boost::winapi::FormatMessageW(
-        FORMAT_MESSAGE_FROM_SYSTEM_ | FORMAT_MESSAGE_IGNORE_INSERTS_,
-        NULL,
-        ev,
-        MAKELANGID_( LANG_NEUTRAL_, SUBLANG_DEFAULT_ ), // Default language
-        wbuffer,
-        static_cast<DWORD_>( len ),
-        NULL
-    );
-
-    if( retval == 0 )
    {
-        return unknown_message_win32( ev, buffer, len );
-    }
+        using namespace boost::winapi;

-    int r = boost::winapi::WideCharToMultiByte( CP_ACP_, 0, wbuffer, -1, buffer, static_cast<int>( len ), NULL, NULL );
+        wchar_t * lpMsgBuf = 0;
+
+        DWORD_ retval = boost::winapi::FormatMessageW(
+            FORMAT_MESSAGE_ALLOCATE_BUFFER_ | FORMAT_MESSAGE_FROM_SYSTEM_ | FORMAT_MESSAGE_IGNORE_INSERTS_,
+            NULL,
+            ev,
+            MAKELANGID_( LANG_NEUTRAL_, SUBLANG_DEFAULT_ ), // Default language
+            (LPWSTR_) &lpMsgBuf,
+            0,
+            NULL
+        );
+
+        if( retval != 0 )
+        {
+            r = boost::winapi::WideCharToMultiByte( code_page, 0, lpMsgBuf, -1, buffer, static_cast<int>( len ), NULL, NULL );
+            boost::winapi::LocalFree( lpMsgBuf );
+            if ( r != 0 ) --r; // exclude null terminator
+        }
+    }

    if( r == 0 )
    {
        return unknown_message_win32( ev, buffer, len );
    }

-    --r; // exclude null terminator
-
    while( r > 0 && ( buffer[ r-1 ] == '\n' || buffer[ r-1 ] == '\r' ) )
    {
        buffer[ --r ] = 0;
@@ -155,8 +186,11 @@ inline std::string system_category_message_win32( int ev )
    }

    local_free lf_ = { lpMsgBuf };
+    (void)lf_;

-    int r = boost::winapi::WideCharToMultiByte( CP_ACP_, 0, lpMsgBuf, -1, 0, 0, NULL, NULL );
+    UINT_ const code_page = message_cp_win32();
+
+    int r = boost::winapi::WideCharToMultiByte( code_page, 0, lpMsgBuf, -1, 0, 0, NULL, NULL );

    if( r == 0 )
    {
@@ -165,7 +199,7 @@ inline std::string system_category_message_win32( int ev )

    std::string buffer( r, char() );

-    r = boost::winapi::WideCharToMultiByte( CP_ACP_, 0, lpMsgBuf, -1, &buffer[0], r, NULL, NULL );
+    r = boost::winapi::WideCharToMultiByte( code_page, 0, lpMsgBuf, -1, &buffer[0], r, NULL, NULL );

    if( r == 0 )
    {
--- a/include/boost/system/error_code.hpp
+++ b/include/boost/system/error_code.hpp
@@ -155,6 +155,10 @@ template<> struct is_error_condition_enum<errc::errc_t>
 };

 // class error_category
+#if ( defined( BOOST_GCC ) && BOOST_GCC >= 40600 ) || defined( BOOST_CLANG )
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
+#endif

 #ifdef BOOST_MSVC
 #pragma warning( push )
@@ -205,16 +209,16 @@ protected:

 #endif

+    BOOST_SYSTEM_CONSTEXPR error_category() BOOST_NOEXCEPT: id_( 0 )
+    {
+    }
+
    explicit BOOST_SYSTEM_CONSTEXPR error_category( boost::ulong_long_type id ) BOOST_NOEXCEPT: id_( id )
    {
    }

 public:

-    BOOST_SYSTEM_CONSTEXPR error_category() BOOST_NOEXCEPT: id_( 0 )
-    {
-    }
-
    virtual const char * name() const BOOST_NOEXCEPT = 0;

    virtual error_condition default_error_condition( int ev ) const BOOST_NOEXCEPT;
@@ -278,7 +282,8 @@ public:

    // clang++ 3.8 and below: initialization of const object
    // requires a user-provided default constructor
-    BOOST_SYSTEM_CONSTEXPR generic_error_category() BOOST_NOEXCEPT: error_category( 0xB2AB117A257EDF0Dull )
+    BOOST_SYSTEM_CONSTEXPR generic_error_category() BOOST_NOEXCEPT:
+        error_category( ( boost::ulong_long_type( 0xB2AB117A ) << 32 ) + 0x257EDF0D )
    {
    }

@@ -295,7 +300,8 @@ class BOOST_SYMBOL_VISIBLE system_error_category: public error_category
 {
 public:

-    BOOST_SYSTEM_CONSTEXPR system_error_category() BOOST_NOEXCEPT: error_category( 0x8FAFD21E25C5E09Bull )
+    BOOST_SYSTEM_CONSTEXPR system_error_category() BOOST_NOEXCEPT:
+        error_category( ( boost::ulong_long_type( 0x8FAFD21E ) << 32 ) + 0x25C5E09B )
    {
    }

@@ -312,6 +318,10 @@ public:

 } // namespace detail

+#if ( defined( BOOST_GCC ) && BOOST_GCC >= 40600 ) || defined( BOOST_CLANG )
+#pragma GCC diagnostic pop
+#endif
+
 // generic_category(), system_category()

 #if defined(BOOST_SYSTEM_HAS_CONSTEXPR)
@@ -497,7 +507,7 @@ public:

    BOOST_SYSTEM_CONSTEXPR explicit operator bool() const BOOST_NOEXCEPT  // true if error
    {
-        return failed_;
+        return val_ != 0;
    }

 #else
@@ -507,12 +517,12 @@ public:

    BOOST_SYSTEM_CONSTEXPR operator unspecified_bool_type() const BOOST_NOEXCEPT  // true if error
    {
-        return failed_? unspecified_bool_true: 0;
+        return val_ != 0? unspecified_bool_true: 0;
    }

    BOOST_SYSTEM_CONSTEXPR bool operator!() const BOOST_NOEXCEPT  // true if no error
    {
-        return !failed_;
+        return val_ == 0;
    }

 #endif
@@ -638,7 +648,7 @@ public:

    BOOST_SYSTEM_CONSTEXPR explicit operator bool() const BOOST_NOEXCEPT  // true if error
    {
-        return failed_;
+        return val_ != 0;
    }

 #else
@@ -648,12 +658,12 @@ public:

    BOOST_SYSTEM_CONSTEXPR operator unspecified_bool_type() const  BOOST_NOEXCEPT // true if error
    {
-        return failed_? unspecified_bool_true: 0;
+        return val_ != 0? unspecified_bool_true: 0;
    }

-    BOOST_SYSTEM_CONSTEXPR bool operator!() const  BOOST_NOEXCEPT // true if no error
+    BOOST_SYSTEM_CONSTEXPR bool operator!() const BOOST_NOEXCEPT // true if no error
    {
-        return !failed_;
+        return val_ == 0;
    }

 #endif
@@ -746,7 +756,7 @@ inline bool operator!=( const error_code & lhs, const error_condition & rhs ) BO

 inline bool operator==( const error_condition & condition, const error_code & code ) BOOST_NOEXCEPT
 {
-    return condition.category().equivalent( code, condition.value() ) || code.category().equivalent( code.value(), condition );
+    return code.category().equivalent( code.value(), condition ) || condition.category().equivalent( code, condition.value() );
 }

 inline bool operator!=( const error_condition & lhs, const error_code & rhs ) BOOST_NOEXCEPT
@@ -773,8 +783,8 @@ inline std::size_t hash_value( error_code const & ec )
        id = reinterpret_cast<boost::ulong_long_type>( &cat );
    }

-    boost::ulong_long_type hv = 0xCBF29CE484222325ull;
-    boost::ulong_long_type const prime = 0x00000100000001B3ull;
+    boost::ulong_long_type hv = ( boost::ulong_long_type( 0xCBF29CE4 ) << 32 ) + 0x84222325;
+    boost::ulong_long_type const prime = ( boost::ulong_long_type( 0x00000100 ) << 32 ) + 0x000001B3;

    // id

@@ -847,6 +857,11 @@ inline char const * error_category::message( int ev, char * buffer, std::size_t
 # if defined( BOOST_MSVC )
 #  pragma warning( push )
 #  pragma warning( disable: 4996 )
+# elif defined(__clang__) && defined(__has_warning)
+#  pragma clang diagnostic push
+#  if __has_warning("-Wdeprecated-declarations")
+#   pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#  endif
 # endif

        std::strncpy( buffer, m.c_str(), len - 1 );
@@ -854,6 +869,8 @@ inline char const * error_category::message( int ev, char * buffer, std::size_t

 # if defined( BOOST_MSVC )
 #  pragma warning( pop )
+# elif defined(__clang__) && defined(__has_warning)
+#  pragma clang diagnostic pop
 # endif

        return buffer;
--- a/include/boost/system/system_error.hpp
+++ b/include/boost/system/system_error.hpp
@@ -24,7 +24,7 @@ namespace boost
    // library can be caught. See svn.boost.org/trac/boost/ticket/3697
    {
    public:
-      system_error( error_code ec )
+      explicit system_error( error_code ec )
          : std::runtime_error(""), m_error_code(ec) {}

      system_error( error_code ec, const std::string & what_arg )
@@ -46,8 +46,8 @@ namespace boost

      virtual ~system_error() BOOST_NOEXCEPT_OR_NOTHROW {}

-      const error_code &  code() const BOOST_NOEXCEPT_OR_NOTHROW { return m_error_code; }
-      const char *        what() const BOOST_NOEXCEPT_OR_NOTHROW;
+      error_code code() const BOOST_NOEXCEPT { return m_error_code; }
+      const char * what() const BOOST_NOEXCEPT_OR_NOTHROW;

    private:
      error_code           m_error_code;
--- a/index.html
+++ b/index.html
@@ -1,14 +1,15 @@
 <html>
 <head>
-<meta http-equiv="refresh" content="0; URL=doc/index.html">
+<meta http-equiv="refresh" content="0; URL=doc/html/system.html">
 </head>
 <body>
 Automatic redirection failed, please go to
-<a href="doc/index.html">doc/index.html</a>.
-<hr>
-<p><EFBFBD> Copyright Beman Dawes, 2003</p>
-<p> Distribution under the Boost Software License, Version 1.0.
-(See accompanying file <a href="../../LICENSE_1_0.txt">LICENSE_1_0.txt</a> or copy at <a href="http://www.boost.org/LICENSE_1_0.txt">
-www.boost.org/LICENSE_1_0.txt</a>)</p>
+<a href="doc/html/system.html">doc/html/system.html</a>.
 </body>
-</html>
+</html>
+<!--
+	<09> Copyright Beman Dawes, 2001
+	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
+-->
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -1,7 +1,7 @@
 # Boost System Library test Jamfile

 # Copyright Beman Dawes 2003, 2006
-# Copyright 2017, 2018 Peter Dimov
+# Copyright 2017-2019 Peter Dimov

 # Distributed under the Boost Software License, Version 1.0.
 # See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt
@@ -9,109 +9,37 @@
 # See library home page at http://www.boost.org/libs/system

 import testing ;
-import os ;

-project
-    : requirements
-      <library>/boost/system//boost_system
-    ;
+lib throw_test : throw_test.cpp : <link>shared:<define>THROW_DYN_LINK=1 ;

-   lib throw_test : throw_test.cpp : <link>shared:<define>THROW_DYN_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 ;

-   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 + )
 {
-   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) ] ;
+    local result ;

-      # 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 ] ;
+    result += [ run $(sources) ] ;
+    result += [ run $(sources) : : : <library>/boost/system//boost_system <link>static : $(sources[1]:B)_static ] ;
+    result += [ run $(sources) : : : <library>/boost/system//boost_system <link>shared : $(sources[1]:B)_shared ] ;
+    result += [ run $(sources) : : : <define>BOOST_NO_ANSI_APIS : $(sources[1]:B)_no_ansi ] ;
+    result += [ run $(sources) : : : <define>BOOST_SYSTEM_USE_UTF8 : $(sources[1]:B)_utf8 ] ;

-      # 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) ;
-   }
+    return $(result) ;
 }

 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 dynamic_link_test.cpp throw_test : : : <link>shared : throw_test_shared ;

 system-run initialization_test.cpp ;
-
-run header_only_test.cpp : : : -<library>/boost/system//boost_system ;
-run header_only_test.cpp : : : -<library>/boost/system//boost_system <define>BOOST_NO_ANSI_APIS : header_only_test_no_ansi ;
+system-run header_only_test.cpp ;

 run config_test.cpp : : : <test-info>always_show_run_output ;

-system-run- std_interop_test.cpp ;
+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 ;
@@ -120,7 +48,7 @@ run single_instance_test.cpp single_instance_lib1 single_instance_lib2 : : : <li

 system-run before_main_test.cpp ;
 run-fail throws_assign_fail.cpp ;
-system-run- constexpr_test.cpp ;
+system-run constexpr_test.cpp ;
 system-run win32_hresult_test.cpp ;

 system-run error_category_test.cpp ;
@@ -128,7 +56,9 @@ system-run generic_category_test.cpp ;
 system-run system_category_test.cpp ;
 system-run after_main_test.cpp ;
 system-run failed_test.cpp ;
-system-run- failed_constexpr_test.cpp ;
+system-run failed_constexpr_test.cpp ;

 # Quick (CI) test
 run quick.cpp ;
+
+run warnings_test.cpp : : : <warnings>all <warnings-as-errors>on <toolset>gcc:<cxxflags>-Wnon-virtual-dtor <toolset>clang:<cxxflags>-Wnon-virtual-dtor ;
--- a/test/cmake_subdir_test/CMakeLists.txt
+++ b/test/cmake_subdir_test/CMakeLists.txt
@@ -0,0 +1,22 @@
+# Copyright 2018, 2019 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
+
+cmake_minimum_required(VERSION 3.5)
+
+project(cmake_subdir_test LANGUAGES CXX)
+
+add_subdirectory(../.. boostorg/system)
+add_subdirectory(../../../assert boostorg/assert)
+add_subdirectory(../../../config boostorg/config)
+add_subdirectory(../../../core boostorg/core)
+add_subdirectory(../../../predef boostorg/predef)
+add_subdirectory(../../../winapi boostorg/winapi)
+
+add_executable(quick ../quick.cpp)
+target_link_libraries(quick Boost::system Boost::core)
+
+enable_testing()
+add_test(quick quick)
+
+add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -C $<CONFIG>)
--- a/test/error_code_test.cpp
+++ b/test/error_code_test.cpp
@@ -197,7 +197,8 @@ int main( int, char ** )
 #if defined(BOOST_WINDOWS_API)
  // Borland appends newline, so just check text
  BOOST_TEST( ec.message().substr(0,13) == "Unknown error" );
-  BOOST_TEST( ec_0_system.message().substr(0,36) == "The operation completed successfully" );
+  // Fails when the language isn't US English
+  // BOOST_TEST( ec_0_system.message().substr(0,36) == "The operation completed successfully" );
 #elif  defined(linux) || defined(__linux) || defined(__linux__)
  // Linux appends value to message as unsigned, so it varies with # of bits
  BOOST_TEST( ec.message().substr(0,13) == "Unknown error" );
--- a/test/failed_test.cpp
+++ b/test/failed_test.cpp
@@ -123,13 +123,13 @@ template<class Ec> void test()

    {
        Ec ec( 0, http_category() );
-        TEST_FAILED( ec );
+        BOOST_TEST( ec.failed() );

        ec.assign( 200, http_category() );
-        TEST_NOT_FAILED( ec );
+        BOOST_TEST( !ec.failed() );

        ec = Ec( 404, http_category() );
-        TEST_FAILED( ec );
+        BOOST_TEST( ec.failed() );
    }

 }
--- a/test/system_category_test.cpp
+++ b/test/system_category_test.cpp
@@ -18,6 +18,16 @@

 //

+#if defined(BOOST_WINDOWS_API) && defined(BOOST_SYSTEM_USE_UTF8)
+
+#include <boost/config/pragma_message.hpp>
+
+BOOST_PRAGMA_MESSAGE( "Skipping test due to BOOST_WINDOWS_API && BOOST_SYSTEM_USE_UTF8" )
+
+int main() {}
+
+#else
+
 #if defined(BOOST_WINDOWS_API)

 #include <windows.h>
@@ -90,7 +100,7 @@ static void test_message( sys::error_category const & cat, int ev )
 {
    BOOST_TEST_EQ( cat.message( ev ), sys_strerror( ev ) );

-    char buffer[ 2048 ]; // yes, really
+    char buffer[ 4096 ]; // yes, really
    BOOST_TEST_CSTR_EQ( cat.message( ev, buffer, sizeof( buffer ) ), sys_strerror( ev ).c_str() );
 }

@@ -100,17 +110,12 @@ int main()

    // message

-    for( int i = -2; i < 1024; ++i )
-    {
-        test_message( cat, i );
-    }
-
-    test_message( cat, 5810 );
-
-    for( int i = 10000; i < 11032; ++i )
+    for( int i = -2; i < 16000; ++i )
    {
        test_message( cat, i );
    }

    return boost::report_errors();
 }
+
+#endif // #if defined(BOOST_WINDOWS_API) && defined(BOOST_SYSTEM_USE_UTF8)
--- a/test/system_error_test.cpp
+++ b/test/system_error_test.cpp
@@ -37,7 +37,7 @@ namespace
    BOOST_TEST( ex.code().category() == system_category() );
 # ifdef BOOST_WINDOWS_API
    LANGID language_id;
-#   if !defined(__MINGW32__) && !defined(__CYGWIN__) && !BOOST_PLAT_WINDOWS_RUNTIME
+#   if !BOOST_PLAT_WINDOWS_RUNTIME
      language_id = ::GetUserDefaultUILanguage();
 #   else
      language_id = 0x0409; // Assume US English
--- a/test/warnings_test.cpp
+++ b/test/warnings_test.cpp
@@ -0,0 +1,42 @@
+
+// Copyright 2017, 2019 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/config.hpp>
+
+#if defined( BOOST_GCC ) && BOOST_GCC < 40600
+#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
+#endif
+
+#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();
+}
Author	SHA1	Message	Date
Peter Dimov	9b8cb7f1f6	Fix wrong null character stripping for FormatMessage (Nikita Kniazev)	2019-03-24 01:59:23 +02:00
Peter Dimov	90b2356015	system_error_test: Increase tested messages range (Nikita Kniazev)	2019-03-24 00:24:05 +02:00
Peter Dimov	1c36a72b79	Merge pull request #40 from Kojoley/system_error_test-mingw-non-en system_error_test: Enable locale query on MinGW-w64	2019-03-17 11:28:45 +02:00
Nikita Kniazev	7947d0ed0d	system_error_test: Reenable locale query on MinGW and Cygwin	2019-03-17 01:53:37 +03:00
Peter Dimov	72d3e96c73	Disable English-dependent test; fixes #39 .	2019-03-16 19:51:21 +02:00
Peter Dimov	ca882f286c	Skip system_category_test_utf8; comparing against FormatMessageA isn't going to work. Fixes #38 .	2019-03-16 19:44:43 +02:00
Peter Dimov	df78f08bd2	Merge pull request #37 from Kojoley/patch-1 system_category_test: Increase buffer size	2019-03-16 19:02:47 +02:00
Nikita Kniazev	f878f41fe7	system_category_test: Increase buffer size The message for 5810 error does not fit into buffer on non-English locales.	2019-03-16 01:55:18 +03:00
Peter Dimov	0134441a6e	Add warnings_test.cpp; disable -Wnon-virtual-dtor on g++ < 4.6	2019-03-04 19:23:32 +02:00
Peter Dimov	c705bab504	#pragma GCC diagnostic push/pop requires gcc 4.6	2019-03-04 17:38:52 +02:00
Peter Dimov	af1dc84160	Disable -Wnon-virtual-dtor	2019-03-04 16:35:35 +02:00
Peter Dimov	2d37749d00	Enable -Wnon-virtual-dtor in warnings_test	2019-03-04 15:40:03 +02:00
Peter Dimov	3164b387a5	Revert operator bool() to its pre-failed value() != 0 meaning	2019-02-27 21:10:57 +02:00
Peter Dimov	9753cf7668	Update test/Jamfile	2019-02-27 06:23:16 +02:00
Peter Dimov	ef7c34fc30	Remove use of _alloca	2019-02-26 17:22:58 +02:00
Peter Dimov	f726c068c3	Add UTF-8 tests	2019-02-26 16:42:47 +02:00
Peter Dimov	2929d2dea2	Fix .travis.yml	2019-01-06 04:38:22 +02:00
Peter Dimov	2c01c5d5c8	Add test/cmake_subdir_test	2019-01-05 19:55:38 +02:00
Peter Dimov	5ab9a5117d	Update CMakeLists.txt	2019-01-04 19:38:01 +02:00
Mike Dev	ee916382df	[CMake] Generate cmake target that other libraries can use ... to express their dependency on this library and retrieve any configuration information such as the include directory, binary to link to (if any), transitive dependencies, necessary compiler options or the required c++ standards level.	2018-12-23 22:47:51 +01:00
Peter Dimov	fc1f2f4845	Remove essentials from yml files	2018-12-22 05:14:53 +02:00
Peter Dimov	65daf972d3	Update .yml files	2018-12-18 21:56:44 +02:00
Peter Dimov	3a4fff686e	Fix warnings on clang-win	2018-10-27 05:30:27 +03:00
Peter Dimov	054c0caf60	Add newline at end	2018-10-04 21:13:56 +03:00
Peter Dimov	b31fb4804d	Document system_error changes; add example for message(ev, buffer, len)	2018-10-03 03:40:10 +03:00
Peter Dimov	7f303cc4b6	Remove old .html files; update redirect	2018-10-03 01:19:28 +03:00
Peter Dimov	504fb05c2f	Make system_error(ec) explicit, return by value from system_error::code()	2018-10-03 01:15:43 +03:00
Peter Dimov	d13fa54450	Remove throws() from synopsis; document system_error	2018-10-03 00:24:10 +03:00
Peter Dimov	fb44b43f0a	Merge branch 'develop' into feature/asciidoc	2018-10-02 23:02:24 +03:00
Peter Dimov	e87cd333a8	Work around 'unused variable' MSVC warning	2018-10-02 18:39:41 +03:00
Peter Dimov	3d01409fe6	Avoid long long warnings	2018-10-02 17:51:09 +03:00
Peter Dimov	25a34e1647	Merge branch 'develop' into feature/warnings-all	2018-10-02 17:15:40 +03:00
Peter Dimov	78a1813c13	Merge branch 'develop' into feature/use-utf8	2018-10-02 04:36:25 +03:00
Peter Dimov	342400c7ec	Add a quick test with -Wall -Werror	2018-10-02 04:34:33 +03:00
Peter Dimov	1b4c7f366d	Minor grammar fixes	2018-10-02 04:03:39 +03:00
Peter Dimov	af2edc5bea	Add .gitignore	2018-10-02 02:59:42 +03:00
Peter Dimov	1e6dc86a68	Change code to match documentation	2018-10-02 02:59:03 +03:00
Peter Dimov	efff0260f7	Add changes, reference; fix trailing whitespace	2018-10-02 02:58:21 +03:00
Peter Dimov	62ca8e6d8c	Add asciidoc documentation	2018-10-01 19:20:52 +03:00
Peter Dimov	584f9731ad	Refactor BOOST_SYSTEM_USE_UTF8 code	2018-10-01 17:40:16 +03:00
Peter Dimov	b300fdeef4	Use CP_UTF8 when BOOST_SYSTEM_USE_UTF8 is defined	2018-09-21 20:45:44 +03:00