This commit was manufactured by cvs2svn to create tag

'Version_1_23_0'. [SVN r10562]
2026-08-04 20:44:11 +02:00 · 2001-07-06 20:31:02 +00:00
28 changed files with 1447 additions and 1517 deletions
@@ -1,11 +0,0 @@
-# To get started with Dependabot version updates, you'll need to specify which
-# package ecosystems to update and where the package manifests are located.
-# Please see the documentation for all configuration options:
-# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
-
-version: 2
-updates:
-  - package-ecosystem: "github-actions" # See documentation for possible values
-    directory: "/" # Location of package manifests
-    schedule:
-        interval: "weekly"
@@ -1,182 +0,0 @@
-name: CI
-
-on:
-  pull_request:
-  push:
-    branches:
-      - master
-      - develop
-      - feature/**
-
-env:
-  UBSAN_OPTIONS: print_stacktrace=1
-
-jobs:
-  posix:
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - toolset: gcc-14  # Do not remove! It is the only toolset that tests CMake tests down below
-            cxxstd: "03,11,14,17,20"
-            os: ubuntu-24.04
-          - toolset: gcc-12
-            cxxstd: "03,11,14,17,2a"
-            os: ubuntu-22.04
-            cxxflags: "cxxflags=--coverage -fsanitize=address,leak,undefined -fno-sanitize-recover=undefined"
-            linkflags: "linkflags=--coverage -lasan -lubsan"
-            gcov_tool: "gcov-12"
-          - toolset: clang
-            compiler: clang++-14
-            cxxstd: "03,11,14,17,2a"
-            os: ubuntu-22.04
-
-    runs-on: ${{matrix.os}}
-
-    steps:
-      - uses: actions/checkout@v6
-
-      - name: Install packages
-        if: matrix.install
-        run: sudo apt install ${{matrix.install}}
-
-      - name: Setup Boost
-        run: |
-          echo GITHUB_REPOSITORY: $GITHUB_REPOSITORY
-          LIBRARY=${GITHUB_REPOSITORY#*/}
-          echo LIBRARY: $LIBRARY
-          echo "LIBRARY=$LIBRARY" >> $GITHUB_ENV
-          echo GITHUB_BASE_REF: $GITHUB_BASE_REF
-          echo GITHUB_REF: $GITHUB_REF
-          REF=${GITHUB_BASE_REF:-$GITHUB_REF}
-          REF=${REF#refs/heads/}
-          echo REF: $REF
-          BOOST_BRANCH=develop && [ "$REF" == "master" ] && BOOST_BRANCH=master || true
-          echo BOOST_BRANCH: $BOOST_BRANCH
-          cd ..
-          git clone -b $BOOST_BRANCH --depth 10 https://github.com/boostorg/boost.git boost-root
-          cd boost-root
-          git submodule update --init --depth 10 --jobs 2 tools/boostdep tools/inspect libs/filesystem
-          python tools/boostdep/depinst/depinst.py --git_args "--depth 10 --jobs 3" filesystem
-          rm -rf libs/$LIBRARY/*
-          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
-          python tools/boostdep/depinst/depinst.py --include benchmark --include example --include examples --include tools --git_args "--depth 10 --jobs 3" $LIBRARY
-          ./bootstrap.sh
-          ./b2 -j4 variant=debug tools/inspect
-
-      - name: Run CMake tests
-        if: ${{matrix.toolset == 'gcc-14'}}
-        run: |
-          cd ../boost-root/
-          mkdir __build
-          cd __build
-          cmake -DBUILD_TESTING=1 -DBOOST_INCLUDE_LIBRARIES=conversion -DCMAKE_CXX_COMPILER=g++-14 -DCMAKE_C_COMPILER=gcc-14 ..
-          cmake --build . --target tests
-          ctest --output-on-failure --no-tests=error
-          cd ..
-          rm -rf __build
-
-      - name: Run tests
-        run: |
-          cd ../boost-root
-          ./b2 -j3 libs/$LIBRARY/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} variant=debug,release "${{matrix.cxxflags}}" "${{matrix.linkflags}}" "${{matrix.launcher}}"
-          dist/bin/inspect libs/$LIBRARY
-
-      - name: Prepare coverage data
-        if: matrix.gcov_tool
-        run: |
-          mkdir -p $GITHUB_WORKSPACE/coveralls
-
-          echo -e "#!/bin/bash\nexec ${{matrix.gcov_tool}} \"\$@\"" > $GITHUB_WORKSPACE/coveralls/gcov_wrapper.sh
-          chmod +x $GITHUB_WORKSPACE/coveralls/gcov_wrapper.sh
-          wget https://github.com/linux-test-project/lcov/archive/v1.16.zip
-          unzip v1.16.zip
-          LCOV="`pwd`/lcov-1.16/bin/lcov --gcov-tool $GITHUB_WORKSPACE/coveralls/gcov_wrapper.sh"
-
-          echo "$LCOV --directory ../boost-root/bin.v2/libs/$LIBRARY/ --base-directory `pwd`/libs/$LIBRARY/test --capture --output-file $GITHUB_WORKSPACE/coveralls/coverage.info"
-          $LCOV --directory ../boost-root/bin.v2/libs/$LIBRARY/ --base-directory ../boost-root/ --capture --output-file $GITHUB_WORKSPACE/coveralls/coverage.info
-          $LCOV --remove $GITHUB_WORKSPACE/coveralls/coverage.info "/usr*" "*/$LIBRARY/test/*" ${{matrix.ignore_coverage}} "*/$LIBRARY/tests/*" "*/$LIBRARY/examples/*" "*/$LIBRARY/example/*" -o $GITHUB_WORKSPACE/coveralls/coverage.info
-
-          cd ../boost-root
-          OTHER_LIBS=`grep "submodule .*" .gitmodules | sed 's/\[submodule\ "\(.*\)"\]/"\*\/boost\/\1\.hpp" "\*\/boost\/\1\/\*"/g'| sed "/\"\*\/boost\/$LIBRARY\/\*\"/d" | sed ':a;N;$!ba;s/\n/ /g'`
-          echo $OTHER_LIBS
-          eval "$LCOV --remove $GITHUB_WORKSPACE/coveralls/coverage.info $OTHER_LIBS -o $GITHUB_WORKSPACE/coveralls/coverage.info"
-
-      - name: Coveralls
-        uses: coverallsapp/github-action@master
-        if: matrix.gcov_tool
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          path-to-lcov: ./coveralls/coverage.info
-          parallel: true
-
-  windows:
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - toolset: msvc-14.3
-            cxxstd: "14,17,latest"
-            addrmd: 32,64
-            os: windows-2025
-          - toolset: gcc
-            cxxstd: "03,11,14,17,2a"
-            addrmd: 64
-            os: windows-2025
-
-    runs-on: ${{matrix.os}}
-
-    steps:
-      - uses: actions/checkout@v6
-
-      - name: Setup Boost
-        shell: cmd
-        run: |
-          echo GITHUB_REPOSITORY: %GITHUB_REPOSITORY%
-          for /f %%i in ("%GITHUB_REPOSITORY%") do set LIBRARY=%%~nxi
-          echo LIBRARY: %LIBRARY%
-          echo LIBRARY=%LIBRARY%>>%GITHUB_ENV%
-          echo GITHUB_BASE_REF: %GITHUB_BASE_REF%
-          echo GITHUB_REF: %GITHUB_REF%
-          if "%GITHUB_BASE_REF%" == "" set GITHUB_BASE_REF=%GITHUB_REF%
-          set BOOST_BRANCH=develop
-          for /f %%i in ("%GITHUB_BASE_REF%") do if "%%~nxi" == "master" set BOOST_BRANCH=master
-          echo BOOST_BRANCH: %BOOST_BRANCH%
-          cd ..
-          git clone -b %BOOST_BRANCH% --depth 10 https://github.com/boostorg/boost.git boost-root
-          cd boost-root
-          xcopy /s /e /q %GITHUB_WORKSPACE% libs\%LIBRARY%\
-          git submodule update --init tools/boostdep
-          python tools/boostdep/depinst/depinst.py --include benchmark --include example --include examples --include tools --git_args "--jobs 3" %LIBRARY%
-          cmd /c bootstrap
-
-      - name: Run CMake tests
-        if: ${{matrix.toolset == 'msvc-14.3'}}
-        shell: cmd
-        run: |
-          choco install --no-progress ninja
-          call "C:/Program Files/Microsoft Visual Studio/2022/Enterprise/VC/Auxiliary/Build/vcvarsall.bat" x64
-          cd ../boost-root/
-          mkdir __build
-          cd __build
-          cmake -DBUILD_TESTING=1 -DBOOST_INCLUDE_LIBRARIES=conversion ..
-          cmake --build . --target tests --config Debug
-          ctest --output-on-failure --no-tests=error -C Debug
-          cd ..
-          rm -rf __build
-
-      - name: Run tests
-        shell: cmd
-        run: |
-          cd ../boost-root
-          b2 -j3 libs/%LIBRARY%/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} address-model=${{matrix.addrmd}} variant=debug,release
-
-  finish:
-    needs: posix
-    runs-on: ubuntu-latest
-    steps:
-    - name: Coveralls Finished
-      uses: coverallsapp/github-action@master
-      with:
-        github-token: ${{ secrets.github_token }}
-        parallel-finished: true
@@ -1,22 +0,0 @@
-# Copyright 2019 Mike Dev
-# Distributed under the Boost Software License, Version 1.0.
-# See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
-
-cmake_minimum_required( VERSION 3.5...4.20 )
-project( boost_conversion VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX )
-
-add_library( boost_conversion INTERFACE )
-add_library( Boost::conversion ALIAS boost_conversion )
-
-target_include_directories( boost_conversion INTERFACE include )
-
-target_link_libraries( boost_conversion
-    INTERFACE
-        Boost::assert
-        Boost::config
-        Boost::throw_exception
-)
-
-if(BUILD_TESTING)
-  add_subdirectory(test)
-endif()
@@ -1,15 +0,0 @@
-# [Boost.Conversion](https://boost.org/libs/conversion)
-Boost.Conversion is one of the [Boost C++ Libraries](https://github.com/boostorg). This library improves program safety and clarity by performing otherwise messy conversions. 
-
-### Test results
-
-@               | Build         | Tests coverage | More info
----------------|-------------- | -------------- |-----------
-Develop branch: | [![CI](https://github.com/boostorg/conversion/actions/workflows/ci.yml/badge.svg?branch=develop)](https://github.com/boostorg/conversion/actions/workflows/ci.yml) [![Build status](https://ci.appveyor.com/api/projects/status/1cky1hrunfa46bdx/branch/develop?svg=true)](https://ci.appveyor.com/project/apolukhin/conversion/branch/develop) | [![Coverage Status](https://coveralls.io/repos/github/boostorg/conversion/badge.svg?branch=develop)](https://coveralls.io/github/boostorg/conversion?branch=develop) | [details...](https://regression.boost.io/develop/developer/conversion.html)
-Master branch:  | [![CI](https://github.com/boostorg/conversion/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/boostorg/conversion/actions/workflows/ci.yml) [![Build status](https://ci.appveyor.com/api/projects/status/1cky1hrunfa46bdx/branch/master?svg=true)](https://ci.appveyor.com/project/apolukhin/conversion/branch/master) | [![Coverage Status](https://coveralls.io/repos/github/boostorg/conversion/badge.svg?branch=master)](https://coveralls.io/github/boostorg/conversion?branch=master) | [details...](https://regression.boost.io/master/developer/conversion.html)
-
-[Latest developer documentation](https://www.boost.org/doc/libs/develop/doc/html/conversion.html)
-
-### License
-
-Distributed under the [Boost Software License, Version 1.0](https://boost.org/LICENSE_1_0.txt).
@@ -1,25 +0,0 @@
-# Copyright René Ferdinand Rivera Morell 2023-2024
-# 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)
-
-require-b2 5.2 ;
-
-constant boost_dependencies :
-    /boost/assert//boost_assert
-    /boost/config//boost_config
-    /boost/throw_exception//boost_throw_exception ;
-
-project /boost/conversion
-    : common-requirements
-        <include>include
-    ;
-
-explicit
-    [ alias boost_conversion : : : : <library>$(boost_dependencies) ]
-    [ alias all : boost_conversion test ]
-    ;
-
-call-if : boost-library conversion
-    ;
-
@@ -0,0 +1,145 @@
+<html>
+
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
+<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
+<meta name="ProgId" content="FrontPage.Editor.Document">
+<title>Header boost/cast.hpp Documentation</title>
+</head>
+
+<body bgcolor="#FFFFFF" text="#000000">
+
+<h1><img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align="center" width="277" height="86">Header
+<a href="../../boost/cast.hpp">boost/cast.hpp</a></h1>
+<h2><a name="Cast Functions">Cast Functions</a></h2>
+<p>The <code>header <a href="../../boost/cast.hpp">boost/cast.hpp</a></code>
+provides <a href="#Polymorphic_cast"><b>polymorphic_cast</b></a>, <a href="#Polymorphic_cast"><b>polymorphic_downcast</b></a>,
+and <a href="#numeric_cast"><b>numeric_cast</b></a> function templates designed
+to complement the C++ built-in casts.</p>
+<p>The program&nbsp;<a href="cast_test.cpp">cast_test.cpp</a> can be used to
+verify these function templates work as expected.</p>
+<h3><a name="Polymorphic_cast">Polymorphic casts</a></h3>
+<p>Pointers to polymorphic objects (objects of classes which define at least one
+virtual function) are sometimes downcast or crosscast.&nbsp; Downcasting means
+casting from a base class to a derived class.&nbsp; Crosscasting means casting
+across an inheritance hierarchy diagram, such as from one base to the other in a
+<b>Y</b> diagram hierarchy.</p>
+<p>Such casts can be done with old-style casts, but this approach is never to be
+recommended.&nbsp; Old-style casts are sorely lacking in type safety, suffer
+poor readability, and are difficult to locate with search tools.</p>
+<p>The C++ built-in <b>static_cast</b> can be used for efficiently downcasting
+pointers to polymorphic objects, but provides no error detection for the case
+where the pointer being cast actually points to the wrong derived class. The <b>polymorphic_downcast</b>
+template retains the efficiency of <b>static_cast</b> for non-debug
+compilations, but for debug compilations adds safety via an assert() that a <b>dynamic_cast</b>
+succeeds.&nbsp;<b>&nbsp;</b></p>
+<p>The C++ built-in <b>dynamic_cast</b> can be used for downcasts and crosscasts
+of pointers to polymorphic objects, but error notification in the form of a
+returned value of 0 is inconvenient to test, or worse yet, easy to forget to
+test.&nbsp; The <b>polymorphic_cast</b> template performs a <b>dynamic_cast</b>,
+and throws an exception if the <b>dynamic_cast</b> returns 0.</p>
+<p>A <b>polymorphic_downcast</b> is preferred when debug-mode tests will cover
+100% of the object types possibly cast and when non-debug-mode efficiency is an
+issue. If these two conditions are not present, <b>polymorphic_cast</b> is
+preferred.&nbsp; It must also be used for crosscasts.&nbsp; It does an assert(
+dynamic_cast&lt;Derived&gt;(x) == x ) where x is the base pointer, ensuring that
+not only is a non-zero pointer returned, but also that it correct in the
+presence of multiple inheritance.<b> Warning:</b>: Because <b>polymorphic_downcast</b>
+uses assert(), it violates the one definition rule (ODR) if NDEBUG is inconsistently
+defined across translation units.&nbsp; [See ISO Std 3.2]</p>
+<p>The C++ built-in <b>dynamic_cast</b> must be used to cast references rather
+than pointers.&nbsp; It is also the only cast that can be used to check whether
+a given interface is supported; in that case a return of 0 isn't an error
+condition.</p>
+<h3>polymorphic_cast and polymorphic_downcast synopsis</h3>
+<blockquote>
+  <pre>namespace boost {
+
+template &lt;class Derived, class Base&gt;
+inline Derived polymorphic_cast(Base* x);
+// Throws: std::bad_cast if ( dynamic_cast&lt;Derived&gt;(x) == 0 )
+// Returns: dynamic_cast&lt;Derived&gt;(x)
+
+template &lt;class Derived, class Base&gt;
+inline Derived polymorphic_downcast(Base* x);
+// Effects: assert( dynamic_cast&lt;Derived&gt;(x) == x );
+// Returns: static_cast&lt;Derived&gt;(x)
+
+}</pre>
+</blockquote>
+<h3>polymorphic_downcast example</h3>
+<blockquote>
+  <pre>#include &lt;boost/cast.hpp&gt;
+...
+class Fruit { public: virtual ~Fruit(){}; ... };
+class Banana : public Fruit { ... };
+...
+void f( Fruit * fruit ) {
+// ... logic which leads us to believe it is a Banana
+  Banana * banana = boost::polymorphic_downcast&lt;Banana*&gt;(fruit);
+  ...</pre>
+</blockquote>
+<h3><a name="numeric_cast">numeric_cast</a></h3>
+<p>A <b>static_cast</b> or implicit conversion will not
+detect failure to preserve range for numeric casts. The <b>numeric_cast</b> function
+templates are similar to <b>static_cast</b> and certain (dubious)
+implicit conversions in this respect, except that they detect loss of numeric
+range. An exception is thrown when a runtime value-preservation check fails.</p>
+<p>The requirements on the argument and result types are:</p>
+<blockquote>
+  <ul>
+    <li>Both argument and result types are CopyConstructible [ISO Std 20.1.3].</li>
+    <li>Both argument and result types are Numeric, defined by <code>std::numeric_limits&lt;&gt;::is_specialized</code>
+      being true.</li>
+    <li>The argument can be converted to the result type using <b>static_cast</b>.</li>
+  </ul>
+</blockquote>
+<h3>numeric_cast synopsis</h3>
+<blockquote>
+  <pre>namespace boost {
+
+class bad_numeric_cast : public std::bad_cast {...};
+
+template&lt;typename Target, typename Source&gt;
+  inline Target numeric_cast(Source arg);
+    // Throws:  bad_numeric_cast unless, in converting arg from Source to Target,
+    //          there is no loss of negative range, and no underflow, and no
+    //          overflow, as determined by std::numeric_limits
+    // Returns: static_cast&lt;Target&gt;(arg)
+
+}</pre>
+</blockquote>
+<h3>numeric_cast example</h3>
+<blockquote>
+  <pre>#include &lt;boost/cast.hpp&gt;
+using namespace boost::cast;
+
+void ariane(double vx)
+{
+    ...
+    unsigned short dx = numeric_cast&lt;unsigned short&gt;(vx);
+    ...
+}</pre>
+</blockquote>
+<h3>numeric_cast rationale</h3>
+<p>The form of the throws condition is specified so that != is not a required
+operation.</p>
+<h3>History</h3>
+<p><b>polymorphic_cast</b> was suggested by Bjarne Stroustrup in &quot;The C++
+Programming Language&quot;.<br>
+<b>polymorphic_downcast</b> was contributed by <a href="../../people/dave_abrahams.htm">Dave
+Abrahams</a>.<b><br>
+numeric_cast</b> was contributed by <a href="../../people/kevlin_henney.htm">Kevlin
+Henney</a>.</p>
+<hr>
+<p>Revised&nbsp; <!--webbot bot="Timestamp" s-type="EDITED" s-format="%d %B, %Y" startspan
+-->06 January, 2001<!--webbot bot="Timestamp" endspan i-checksum="38320"
+--></p>
+<p>© Copyright boost.org 1999. Permission to copy, use, modify, sell and
+distribute this document is granted provided this copyright notice appears in
+all copies. This document is provided &quot;as is&quot; without express or
+implied warranty, and with no claim as to its suitability for any purpose.</p>
+
+</body>
+
+</html>
@@ -0,0 +1,153 @@
+//  boost utility cast test program  -----------------------------------------//
+
+//  (C) Copyright boost.org 1999. Permission to copy, use, modify, sell
+//  and distribute this software is granted provided this copyright
+//  notice appears in all copies. This software is provided "as is" without
+//  express or implied warranty, and with no claim as to its suitability for
+//  any purpose.
+
+//  See http://www.boost.org for most recent version including documentation.
+
+//  Revision History
+//   20 Jan 01  removed use of <limits> for portability to raw GCC (David Abrahams)
+//   28 Jun 00  implicit_cast removed (Beman Dawes)
+//   30 Aug 99  value_cast replaced by numeric_cast
+//    3 Aug 99  Initial Version
+
+#include <iostream>
+#include <climits>
+#include <boost/cast.hpp>
+
+#  if SCHAR_MAX == LONG_MAX
+#      error "This test program doesn't work if SCHAR_MAX == LONG_MAX"
+#  endif 
+
+using namespace boost;
+using std::cout;
+
+namespace
+{
+    struct Base
+    { 
+        virtual char kind() { return 'B'; }
+    };
+    
+    struct Base2
+    { 
+        virtual char kind2() { return '2'; }
+    };
+    
+    struct Derived : public Base, Base2
+    {
+        virtual char kind() { return 'D'; }
+    }; 
+}   
+
+
+int main( int argc, char * argv[] )
+{
+    cout << "Usage: test_casts [n], where n omitted or is:\n"
+            "  1 = execute #1 assert failure (#ifndef NDEBUG)\n"
+            "  2 = execute #2 assert failure (#ifndef NDEBUG)\n"
+            "Example: test_casts 2\n\n";
+
+#   ifdef NDEBUG
+        cout << "NDEBUG is defined\n";
+#   else
+        cout << "NDEBUG is not defined\n";
+#   endif
+
+    cout << "\nBeginning tests...\n";        
+
+//  test polymorphic_cast  ---------------------------------------------------//
+    
+    //  tests which should succeed
+    Base *    base = new Derived;
+    Base2 *   base2 = 0;
+    Derived * derived = 0;
+    derived = polymorphic_downcast<Derived*>( base );  // downcast
+    assert( derived->kind() == 'D' );
+
+    derived = 0;
+    derived = polymorphic_cast<Derived*>( base ); // downcast, throw on error
+    assert( derived->kind() == 'D' );
+
+    base2 = polymorphic_cast<Base2*>( base ); // crosscast
+    assert( base2->kind2() == '2' );
+
+     //  tests which should result in errors being detected
+    int err_count = 0;
+    base = new Base;
+
+    if ( argc > 1 && *argv[1] == '1' )
+        { derived = polymorphic_downcast<Derived*>( base ); } // #1 assert failure
+
+    bool caught_exception = false;
+    try { derived = polymorphic_cast<Derived*>( base ); }
+    catch (std::bad_cast)
+        { cout<<"caught bad_cast\n"; caught_exception = true; }
+    if ( !caught_exception ) ++err_count;
+    //  the following is just so generated code can be inspected
+    if ( derived->kind() == 'B' ) ++err_count;
+
+//  test implicit_cast and numeric_cast  -------------------------------------//
+    
+    //  tests which should succeed
+    long small_value = 1;
+    long small_negative_value = -1;
+    long large_value = LONG_MAX;
+    long large_negative_value = LONG_MIN;
+    signed char c = 0;
+
+    c = large_value;  // see if compiler generates warning
+
+    c = numeric_cast<signed char>( small_value );
+    assert( c == 1 );
+    c = 0;
+    c = numeric_cast<signed char>( small_value );
+    assert( c == 1 );
+    c = 0;
+    c = numeric_cast<signed char>( small_negative_value );
+    assert( c == -1 );
+
+    // These tests courtesy of Joe R NWP Swatosh<joe.r.swatosh@usace.army.mil>
+    assert( 0.0f == numeric_cast<float>( 0.0 ) );
+    assert( 0.0 == numeric_cast<double>( 0.0 ) );
+    
+    //  tests which should result in errors being detected
+
+    caught_exception = false;
+    try { c = numeric_cast<signed char>( large_value ); }
+    catch (bad_numeric_cast)
+        { cout<<"caught bad_numeric_cast #1\n"; caught_exception = true; }
+    if ( !caught_exception ) ++err_count;
+
+    caught_exception = false;
+    try { c = numeric_cast<signed char>( large_negative_value ); }
+    catch (bad_numeric_cast)
+        { cout<<"caught bad_numeric_cast #2\n"; caught_exception = true; }
+    if ( !caught_exception ) ++err_count;
+
+    unsigned long ul;
+    caught_exception = false;
+    try { ul = numeric_cast<unsigned long>( large_negative_value ); }
+    catch (bad_numeric_cast)
+        { cout<<"caught bad_numeric_cast #3\n"; caught_exception = true; }
+    if ( !caught_exception ) ++err_count;
+
+    caught_exception = false;
+    try { ul = numeric_cast<unsigned long>( small_negative_value ); }
+    catch (bad_numeric_cast)
+        { cout<<"caught bad_numeric_cast #4\n"; caught_exception = true; }
+    if ( !caught_exception ) ++err_count;
+
+    caught_exception = false;
+    try { numeric_cast<int>( DBL_MAX ); }
+    catch (bad_numeric_cast)
+        { cout<<"caught bad_numeric_cast #5\n"; caught_exception = true; }
+    if ( !caught_exception ) ++err_count;
+
+    cout << err_count << " errors detected\nTest "
+         << (err_count==0 ? "passed\n" : "failed\n");
+    return err_count;
+}   // main
@@ -1,38 +0,0 @@
-#   Copyright (c) 2016 Mikhail Maximov <vigorous.activity -at- gmail.com>
-
-#   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)
-
-project doc/conversion ;
-
-using quickbook ;
-import boostbook ;
-
-xml conversion : conversion.qbk ;
-boostbook standalone
-    :
-        conversion
-    :
-        <xsl:param>boost.root=../../../..
-        # File name of HTML output:
-        <xsl:param>root.filename=conversion
-        # How far down we chunk nested sections, basically all of them:
-        <xsl:param>chunk.section.depth=0
-        # Don't put the first section on the same page as the TOC:
-        <xsl:param>chunk.first.sections=0
-        # How far down sections get TOC's
-        <xsl:param>toc.section.depth=2
-        # Max depth in each TOC:
-        <xsl:param>toc.max.depth=2
-        # How far down we go with TOC's
-        <xsl:param>generate.section.toc.level=0
-
-        <xsl:param>generate.manifest=0
-     ;
-
-###############################################################################
-alias boostdoc : conversion ;
-explicit boostdoc ;
-alias boostrelease ;
-explicit boostrelease ;
@@ -1,215 +0,0 @@
-[/
-    Copyright 2016 Mikhail Maximov.
-    Copyright Antony Polukhin, 2020-2026.
-
-    Distributed under the Boost Software License, Version 1.0. (See accompanying
-    file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)
-]
-
-[article The Conversion Library
-    [quickbook 1.6]
-    [compatibility-mode 1.5]
-    [id conversion]
-    [version 1.7]
-    [authors [Stroustrup, Bjarne], [Abrahams, Dave], [Rasin, Boris], [Polukhin, Antony]]
-    [copyright 2001 Beman Dawes, 2014-2026 Antony Polukhin]
-    [license
-        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])
-    ]
-    [source-mode c++]
-]
-
-[/ QuickBook Document version 1.5 ]
-[/ Dec, 2016 ]
-
-[section Description]
-
-The Conversion Library improves program safety and clarity by performing
-otherwise messy conversions. It includes cast-style function templates designed 
-to complement the C++ Standard's built-in casts.
-
-To reduce coupling, the Boost Conversion Library is supplied by several headers:
-
-# The [@boost:boost/polymorphic_cast.hpp boost/polymorphic_cast.hpp] header
-  provides [link polymorphic_cast `polymorphic_cast<>`] and
-  [link polymorphic_downcast `polymorphic_downcast<>`]
-  to perform safe casting between polymorphic types.
-# The [@boost:boost/polymorphic_pointer_cast.hpp boost/polymorphic_pointer_cast.hpp] header
-  provides [link polymorphic_pointer_cast `polymorphic_pointer_cast<>`] and
-  [link polymorphic_pointer_cast `polymorphic_pointer_downcast<>`]
-# The [@boost:boost/implicit_cast.hpp boost/implicit_cast.hpp] header provides `implicit_cast<>` 
-  to perform implicit casts only (no down-cast, no void*->T*, no U->T if T has only explicit constructors for U).
-
-[endsect]
-
-[section Polymorphic casts]
-Pointers to polymorphic objects (objects of classes which define at
-least one virtual function) are sometimes downcast or crosscast.
-Downcasting means casting from a base class to a derived class.
-Crosscasting means casting across an inheritance hierarchy diagram, such
-as from one base to the other in a [^Y] diagram hierarchy.
-
-Such casts can be done with old-style casts, but this approach is
-never to be recommended. Old-style casts are sorely lacking in type
-safety, suffer poor readability, and are difficult to locate with search
-tools.
-
-[#polymorphic_downcast]
-[section polymorphic_downcast]
-
-The C++ built-in `static_cast` can be used for efficiently
-downcasting pointers to polymorphic objects, but provides no error
-detection for the case where the pointer being cast actually points to
-the wrong derived class. The `polymorphic_downcast` template retains
-the efficiency of `static_cast` for non-debug compilations, but for
-debug compilations adds safety via an `assert()` that a `dynamic_cast`
-succeeds.
-
-A `polymorphic_downcast` should be used for
-downcasts that you are certain should succeed. Error checking is
-only performed in translation units where `NDEBUG` is
-not defined, via
-```
-    assert( dynamic_cast<Derived>(x) == x )
-```
-where `x` is the source pointer.  This approach
-ensures that not only is a non-zero pointer returned, but also
-that it is correct in the presence of multiple inheritance.
-Attempts to crosscast using `polymorphic_downcast` will
-fail to compile.
-
-[warning Because `polymorphic_downcast` uses `assert()`, it
-violates the One Definition Rule (ODR) if `NDEBUG` is inconsistently
-defined across translation units. See ISO Std 3.2]
-
-[h4 Example:]
-```
-    #include <boost/polymorphic_cast.hpp>
-    ...
-    class Fruit { public: virtual ~Fruit(){}; ... };
-    class Banana : public Fruit { ... };
-    ...
-    void f( Fruit * fruit ) {
-      // ... logic which leads us to believe it is a Banana
-      Banana * banana = boost::polymorphic_downcast<Banana*>(fruit);
-      ...
-    }
-```
-[endsect]
-
-[#polymorphic_cast]
-[section polymorphic_cast]
-
-The C++ built-in `dynamic_cast` can be used for downcasts and
-crosscasts of pointers to polymorphic objects, but error notification in
-the form of a returned value of 0 is inconvenient to test, or worse yet,
-easy to forget to test. The throwing form of `dynamic_cast`, which
-works on references, can be used on pointers through the ugly expression
-`&dynamic_cast<T&>(*p)`, which causes undefined
-behavior if `p` is `0`. The `polymorphic_cast`
-template performs a `dynamic_cast` on a pointer, and throws an
-exception if the `dynamic_cast` returns 0.
-
-For crosscasts, or when the success of a cast can only be known at runtime, 
-or when efficiency is not important, `polymorphic_cast` is preferred.
-
-The C++ built-in `dynamic_cast` must be used to cast references rather than pointers.
-It is also the only cast that can be used to check whether a given interface is supported; in that case a return of 0 isn't an error condition.
-
-[endsect]
-
-
-[#polymorphic_pointer_cast]
-[section polymorphic_pointer_cast]
-While `polymorphic_downcast` and `polymorphic_cast` work with built-in pointer types only,
-`polymorphic_pointer_downcast` and `polymorphic_pointer_cast` are more generic versions
-with support for any pointer type for which the following expressions would be valid:
-
-For `polymorphic_pointer_downcast`:
-```
-    static_pointer_cast<Derived>(p);
-    dynamic_pointer_cast<Derived>(p);
-```
-For `polymorphic_pointer_cast`:
-```
-    dynamic_pointer_cast<Derived>(p);
-    !p; // conversion to bool with negation
-```
-
-This includes C++ built-in pointers, `std::shared_ptr`,
-`boost::shared_ptr`, `boost::intrusive_ptr`, etc.
-
-
-[h4 Example:]
-```
-    #include <boost/polymorphic_pointer_cast.hpp>
-
-    class Fruit { public: virtual ~Fruit(){} };
-    class Banana : public Fruit {};
-
-    // Use one of these:
-    using FruitPtr = Fruit*;
-    using FruitPtr = std::shared_ptr<Fruit>;
-    using FruitPtr = boost::shared_ptr<Fruit>;
-    using FruitPtr = boost::intrusive_ptr<Fruit>;
-
-    void f(FruitPtr fruit) {
-      // ... logic which leads us to believe it is a banana
-      auto banana = boost::polymorphic_pointer_downcast<Banana>(fruit);
-      ...
-    }
-```
-
-[endsect]
-
-[endsect]
-
-[section Synopsis]
-```
-    namespace boost {
-
-    // Throws: std::bad_cast if ( dynamic_cast<Derived>(x) == 0 )
-    // Returns: dynamic_cast<Derived>(x)
-    template <class Derived, class Base>
-    constexpr Derived polymorphic_cast(Base* x);
-
-    // Effects: assert( dynamic_cast<Derived>(x) == x );
-    // Returns: static_cast<Derived>(x)
-    template <class Derived, class Base>
-    constexpr Derived polymorphic_downcast(Base* x);
-
-    // Effects: assert( dynamic_cast<Derived>(&x) == &x );
-    // Returns: static_cast<Derived>(x)
-    template <class Derived, class Base>
-    constexpr Derived polymorphic_downcast(Base& x);
-
-    // Throws: std::bad_cast if ( dynamic_pointer_cast<Derived>(x) == 0 )
-    // Returns: dynamic_pointer_cast<Derived>(x)
-    template <class Derived, class Base>
-    inline auto polymorphic_pointer_cast(Base x);
-
-    // Effects: assert( dynamic_pointer_cast<Derived>(x) == x );
-    // Returns: static_pointer_cast<Derived>(x)
-    template <class Derived, class Base>
-    inline auto polymorphic_pointer_downcast(Base x);
-
-    }
-```
-[endsect]
-
-
-[section History]
-`polymorphic_cast` was suggested by Bjarne Stroustrup in "The C++ Programming Language".
-
-`polymorphic_downcast` was contributed by [@http://www.boost.org/people/dave_abrahams.htm Dave Abrahams].
-
-`polymorphic_pointer_downcast` was contributed by [@http://www.boost.org/people/boris_rasin.htm Boris Rasin]
-and `polymorphic_pointer_cast` by Antony Polukhin.
-
-`polymorphic_downcast` overload for references was contributed by Julien Delacroix.
-
-An old `numeric_cast` that was contributed by [@http://www.boost.org/people/kevlin_henney.htm Kevlin Henney]
-is now superseded by the [@boost:numeric_conversion/doc/html/html/boost_numericconversion/improved_numeric_cast__.html Boost Numeric Conversion Library]
-[endsect]
@@ -0,0 +1,340 @@
+//  boost cast.hpp header file  ----------------------------------------------//
+
+//  (C) Copyright boost.org 1999. Permission to copy, use, modify, sell
+//  and distribute this software is granted provided this copyright
+//  notice appears in all copies. This software is provided "as is" without
+//  express or implied warranty, and with no claim as to its suitability for
+//  any purpose.
+
+//  See http://www.boost.org for most recent version including documentation.
+
+//  Revision History
+//  02 Apr 01  Removed BOOST_NO_LIMITS workarounds and included 
+//             <boost/limits.hpp> instead (the workaround did not 
+//             actually compile when BOOST_NO_LIMITS was defined in 
+//             any case, so we loose nothing). (John Maddock)
+//  21 Jan 01  Undid a bug I introduced yesterday. numeric_cast<> never
+//             worked with stock GCC; trying to get it to do that broke
+//             vc-stlport.
+//  20 Jan 01  Moved BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS to config.hpp.
+//             Removed unused BOOST_EXPLICIT_TARGET macro. Moved
+//             boost::detail::type to boost/type.hpp. Made it compile with
+//             stock gcc again (Dave Abrahams)
+//  29 Nov 00  Remove nested namespace cast, cleanup spacing before Formal
+//             Review (Beman Dawes)
+//  19 Oct 00  Fix numeric_cast for floating-point types (Dave Abrahams)
+//  15 Jul 00  Suppress numeric_cast warnings for GCC, Borland and MSVC
+//             (Dave Abrahams)
+//  30 Jun 00  More MSVC6 wordarounds.  See comments below.  (Dave Abrahams)
+//  28 Jun 00  Removed implicit_cast<>.  See comment below. (Beman Dawes)
+//  27 Jun 00  More MSVC6 workarounds 
+//  15 Jun 00  Add workarounds for MSVC6
+//   2 Feb 00  Remove bad_numeric_cast ";" syntax error (Doncho Angelov)
+//  26 Jan 00  Add missing throw() to bad_numeric_cast::what(0 (Adam Levar)
+//  29 Dec 99  Change using declarations so usages in other namespaces work
+//             correctly (Dave Abrahams)
+//  23 Sep 99  Change polymorphic_downcast assert to also detect M.I. errors
+//             as suggested Darin Adler and improved by Valentin Bonnard.  
+//   2 Sep 99  Remove controversial asserts, simplify, rename.
+//  30 Aug 99  Move to cast.hpp, replace value_cast with numeric_cast,
+//             place in nested namespace.
+//   3 Aug 99  Initial version
+
+#ifndef BOOST_CAST_HPP
+#define BOOST_CAST_HPP
+
+# include <boost/config.hpp>
+# include <cassert>
+# include <typeinfo>
+# include <boost/type.hpp>
+# include <boost/limits.hpp>
+
+//  It has been demonstrated numerous times that MSVC 6.0 fails silently at link
+//  time if you use a template function which has template parameters that don't
+//  appear in the function's argument list.
+//
+//  TODO: Add this to config.hpp?
+# if defined(BOOST_MSVC) && BOOST_MSVC <= 1200 // 1200 = VC6
+#  define BOOST_EXPLICIT_DEFAULT_TARGET , ::boost::type<Target>* = 0
+# else
+#  define BOOST_EXPLICIT_DEFAULT_TARGET
+# endif
+
+namespace boost
+{
+//  See the documentation for descriptions of how to choose between
+//  static_cast<>, dynamic_cast<>, polymorphic_cast<> and polymorphic_downcast<>
+
+//  polymorphic_cast  --------------------------------------------------------//
+
+    //  Runtime checked polymorphic downcasts and crosscasts.
+    //  Suggested in The C++ Programming Language, 3rd Ed, Bjarne Stroustrup, 
+    //  section 15.8 exercise 1, page 425.
+
+    template <class Target, class Source>
+    inline Target polymorphic_cast(Source* x BOOST_EXPLICIT_DEFAULT_TARGET)
+    {
+        Target tmp = dynamic_cast<Target>(x);
+        if ( tmp == 0 ) throw std::bad_cast();
+        return tmp;
+    }
+
+//  polymorphic_downcast  ----------------------------------------------------//
+
+    //  assert() checked polymorphic downcast.  Crosscasts prohibited.
+
+    //  WARNING: Because this cast uses assert(), it violates the One Definition
+    //  Rule if NDEBUG is inconsistently defined across translation units.
+
+    //  Contributed by Dave Abrahams
+
+    template <class Target, class Source>
+    inline Target polymorphic_downcast(Source* x BOOST_EXPLICIT_DEFAULT_TARGET)
+    {
+        assert( dynamic_cast<Target>(x) == x );  // detect logic error
+        return static_cast<Target>(x);
+    }
+
+//  implicit_cast  -----------------------------------------------------------//
+//
+//  Removed due to uncertain purpose.  Use either numeric_cast (see below)
+//  or static_cast according to the need. 
+
+//  numeric_cast and related exception  --------------------------------------//
+
+//  Contributed by Kevlin Henney
+
+//  bad_numeric_cast  --------------------------------------------------------//
+
+    // exception used to indicate runtime numeric_cast failure
+    class bad_numeric_cast : public std::bad_cast
+    {
+    public:
+        // constructors, destructors and assignment operator defaulted
+
+        // function inlined for brevity and consistency with rest of library
+        virtual const char *what() const throw()
+        {
+            return "bad numeric cast: loss of range in numeric_cast";
+        }
+    };
+
+//  numeric_cast  ------------------------------------------------------------//
+
+#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
+  
+    namespace detail
+    {
+       template <bool is_signed> struct numeric_min_select;
+    
+       template<>
+       struct numeric_min_select<true>
+       {
+         template <class T>
+         struct limits : std::numeric_limits<T>
+         {
+    	   static inline T min()
+# ifndef __GNUC__ // bug workaround courtesy Jens Maurer
+             {
+                 return std::numeric_limits<T>::min() >= 0
+                     // unary minus causes integral promotion, thus the static_cast<>
+                     ? static_cast<T>(-std::numeric_limits<T>::max())
+                     : std::numeric_limits<T>::min();
+             }
+# else
+                 ;
+# endif
+	       };
+       };
+
+# ifdef __GNUC__ // bug workaround courtesy Jens Maurer
+      template<> template<class T>
+      inline T numeric_min_select<true>::limits<T>::min()
+      {
+           return std::numeric_limits<T>::min() >= 0
+               // unary minus causes integral promotion, thus the static_cast<>
+               ? static_cast<T>(-std::numeric_limits<T>::max())
+               : std::numeric_limits<T>::min();
+      }
+# endif
+    
+      template<>
+      struct numeric_min_select<false>
+      {
+          template <class T>
+          struct limits : std::numeric_limits<T> {};
+      };
+      
+      // Move to namespace boost in utility.hpp?
+      template <class T>
+      struct fixed_numeric_limits
+          : public numeric_min_select<
+                       std::numeric_limits<T>::is_signed 
+                   >::template limits<T>
+      {
+      };
+    } // namespace detail
+  
+// less_than_type_min -
+  //    x_is_signed should be numeric_limits<X>::is_signed
+  //    y_is_signed should be numeric_limits<Y>::is_signed
+  //    y_min should be numeric_limits<Y>::min()
+  //
+  //    check(x, y_min) returns true iff x < y_min without invoking comparisons
+  //    between signed and unsigned values.
+  //
+  //    "poor man's partial specialization" is in use here.
+    template <bool x_is_signed, bool y_is_signed>
+    struct less_than_type_min
+    {
+        template <class X, class Y>
+        static bool check(X x, Y y_min)
+            { return x < y_min; }
+    };
+
+    template <>
+    struct less_than_type_min<false, true>
+    {
+        template <class X, class Y>
+        static bool check(X, Y)
+            { return false; }
+    };
+    
+    template <>
+    struct less_than_type_min<true, false>
+    {
+        template <class X, class Y>
+        static bool check(X x, Y)
+            { return x < 0; }
+    };
+    
+  // greater_than_type_max -
+  //    same_sign should be:
+  //            numeric_limits<X>::is_signed == numeric_limits<Y>::is_signed
+  //    y_max should be numeric_limits<Y>::max()
+  //
+  //    check(x, y_max) returns true iff x > y_max without invoking comparisons
+  //    between signed and unsigned values.
+  //
+  //    "poor man's partial specialization" is in use here.
+    template <bool same_sign, bool x_is_signed>
+    struct greater_than_type_max;
+
+    template<>
+    struct greater_than_type_max<true, true>
+    {
+        template <class X, class Y>
+        static inline bool check(X x, Y y_max)
+            { return x > y_max; }
+    };
+
+    template <>
+    struct greater_than_type_max<false, true>
+    {
+        // What does the standard say about this? I think it's right, and it
+        // will work with every compiler I know of.
+        template <class X, class Y>
+        static inline bool check(X x, Y)
+            { return x >= 0 && static_cast<X>(static_cast<Y>(x)) != x; }
+    };
+
+    template<>
+    struct greater_than_type_max<true, false>
+    {
+        template <class X, class Y>
+        static inline bool check(X x, Y y_max)
+            { return x > y_max; }
+    };
+
+    template <>
+    struct greater_than_type_max<false, false>
+    {
+        // What does the standard say about this? I think it's right, and it
+        // will work with every compiler I know of.
+        template <class X, class Y>
+        static inline bool check(X x, Y)
+            { return static_cast<X>(static_cast<Y>(x)) != x; }
+    };
+  
+#else // use #pragma hacks if available
+
+  namespace detail
+  {
+# if BOOST_MSVC
+#  pragma warning(push)
+#  pragma warning(disable : 4018)
+#  pragma warning(disable : 4146)
+#elif defined(__BORLANDC__)
+#  pragma option push -w-8041
+# endif
+
+       // Move to namespace boost in utility.hpp?
+       template <class T>
+       struct fixed_numeric_limits : public std::numeric_limits<T>
+       {
+           static inline T min()
+           {
+               return std::numeric_limits<T>::is_signed && std::numeric_limits<T>::min() >= 0
+                   ? T(-std::numeric_limits<T>::max()) : std::numeric_limits<T>::min();
+           }
+       };
+  
+# if BOOST_MSVC
+#  pragma warning(pop)
+#elif defined(__BORLANDC__)
+#  pragma option pop
+# endif
+  } // namespace detail
+  
+#endif
+  
+    template<typename Target, typename Source>
+    inline Target numeric_cast(Source arg BOOST_EXPLICIT_DEFAULT_TARGET)
+    {
+        // typedefs abbreviating respective trait classes
+        typedef std::numeric_limits<Source> arg_traits;
+        typedef detail::fixed_numeric_limits<Target> result_traits;
+        
+#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
+        // typedefs that act as compile time assertions
+        // (to be replaced by boost compile time assertions
+        // as and when they become available and are stable)
+        typedef bool argument_must_be_numeric[arg_traits::is_specialized];
+        typedef bool result_must_be_numeric[result_traits::is_specialized];
+
+        const bool arg_is_signed = arg_traits::is_signed;
+        const bool result_is_signed = result_traits::is_signed;
+        const bool same_sign = arg_is_signed == result_is_signed;
+
+        if (less_than_type_min<arg_is_signed, result_is_signed>::check(arg, result_traits::min())
+            || greater_than_type_max<same_sign, arg_is_signed>::check(arg, result_traits::max())
+            )
+            
+#else // We need to use #pragma hacks if available
+            
+# if BOOST_MSVC
+#  pragma warning(push)
+#  pragma warning(disable : 4018)
+#elif defined(__BORLANDC__)
+#pragma option push -w-8012
+# endif
+        if ((arg < 0 && !result_traits::is_signed)  // loss of negative range
+             || (arg_traits::is_signed && arg < result_traits::min())  // underflow
+             || arg > result_traits::max())            // overflow
+# if BOOST_MSVC
+#  pragma warning(pop)
+#elif defined(__BORLANDC__)
+#pragma option pop
+# endif
+#endif
+        {
+            throw bad_numeric_cast();
+        }
+        return static_cast<Target>(arg);
+    } // numeric_cast
+
+#  undef BOOST_EXPLICIT_DEFAULT_TARGET
+
+} // namespace boost
+
+#endif  // BOOST_CAST_HPP
@@ -1,38 +0,0 @@
-// Copyright David Abrahams 2003.
-// Distributed under the Boost Software License, Version 1.0. (See
-// accompanying file LICENSE_1_0.txt or copy at
-// http://www.boost.org/LICENSE_1_0.txt)
-
-#ifndef BOOST_IMPLICIT_CAST_DWA200356_HPP
-#define BOOST_IMPLICIT_CAST_DWA200356_HPP
-
-#include <boost/config.hpp>
-#ifdef BOOST_HAS_PRAGMA_ONCE
-# pragma once
-#endif
-
-namespace boost {
-
-namespace detail {
-
-template<class T> struct icast_identity
-{
-    using type = T;
-};
-
-} // namespace detail
-
-// implementation originally suggested by C. Green in
-// http://lists.boost.org/MailArchives/boost/msg00886.php
-
-// The use of identity creates a non-deduced form, so that the
-// explicit template argument must be supplied
-template <typename T>
-constexpr T implicit_cast (typename boost::detail::icast_identity<T>::type x) {
-    return x;
-}
-
-} // namespace boost
-
-
-#endif // BOOST_IMPLICIT_CAST_DWA200356_HPP
@@ -0,0 +1,67 @@
+//  boost lexical_cast.hpp header  -------------------------------------------//
+
+//  See http://www.boost.org for most recent version including documentation.
+
+#ifndef BOOST_LEXICAL_CAST_INCLUDED
+#define BOOST_LEXICAL_CAST_INCLUDED
+
+// what:  lexical_cast custom keyword cast
+// who:   contributed by Kevlin Henney, with alternative naming, behaviors
+//        and fixes contributed by Dave Abrahams, Daryle Walker and other
+//        Boosters on the list
+// when:  November 2000
+// where: tested with MSVC 6.0, BCC 5.5, and g++ 2.91
+
+#include <boost/config.hpp>
+# ifndef BOOST_NO_STRINGSTREAM
+#  include <sstream>
+# else
+#  include <strstream>
+# endif
+#include <typeinfo>
+
+namespace boost
+{
+    // exception used to indicate runtime lexical_cast failure
+    class bad_lexical_cast : public std::bad_cast
+    {
+    public:
+        // constructors, destructors, and assignment operator defaulted
+
+        // function inlined for brevity and consistency with rest of library
+        virtual const char * what() const throw()
+        {
+            return "bad lexical cast: "
+                   "source type value could not be interpreted as target";
+        }
+    };
+
+    template<typename Target, typename Source>
+    Target lexical_cast(Source arg)
+    {
+# ifndef BOOST_NO_STRINGSTREAM
+        std::stringstream interpreter;
+# else
+        std::strstream interpreter; // for out-of-the-box g++ 2.95.2
+# endif
+        Target result;
+
+        if(!(interpreter << arg) || !(interpreter >> result) ||
+           !(interpreter >> std::ws).eof())
+            throw bad_lexical_cast();
+
+        return result;
+    }
+}
+
+// Copyright Kevlin Henney, 2000. All rights reserved.
+//
+// Permission to use, copy, modify, and distribute this software for any
+// purpose is hereby granted without fee, provided that this copyright and
+// permissions notice appear in all copies and derivatives, and that no
+// charge may be made for the software and its documentation except to cover
+// cost of distribution.
+//
+// This software is provided "as is" without express or implied warranty.
+
+#endif
@@ -1,132 +0,0 @@
-//  boost polymorphic_cast.hpp header file  ----------------------------------------------//
-
-//  (C) Copyright Kevlin Henney and Dave Abrahams 1999.
-//  (C) Copyright Boris Rasin 2014.
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-//  See http://www.boost.org/libs/conversion for Documentation.
-
-//  Revision History
-//  10 Nov 14  polymorphic_pointer_downcast moved to a separate header,
-//             minor improvements to stisfy latest Boost coding style
-//  08 Nov 14  Add polymorphic_pointer_downcast (Boris Rasin)
-//  09 Jun 14  "cast.hpp" was renamed to "polymorphic_cast.hpp" and
-//             inclusion of numeric_cast was removed (Antony Polukhin)
-//  23 Jun 05  numeric_cast removed and redirected to the new version (Fernando Cacciola)
-//  02 Apr 01  Removed BOOST_NO_LIMITS workarounds and included
-//             <boost/limits.hpp> instead (the workaround did not
-//             actually compile when BOOST_NO_LIMITS was defined in
-//             any case, so we loose nothing). (John Maddock)
-//  21 Jan 01  Undid a bug I introduced yesterday. numeric_cast<> never
-//             worked with stock GCC; trying to get it to do that broke
-//             vc-stlport.
-//  20 Jan 01  Moved BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS to config.hpp.
-//             Removed unused BOOST_EXPLICIT_TARGET macro. Moved
-//             boost::detail::type to boost/type.hpp. Made it compile with
-//             stock gcc again (Dave Abrahams)
-//  29 Nov 00  Remove nested namespace cast, cleanup spacing before Formal
-//             Review (Beman Dawes)
-//  19 Oct 00  Fix numeric_cast for floating-point types (Dave Abrahams)
-//  15 Jul 00  Suppress numeric_cast warnings for GCC, Borland and MSVC
-//             (Dave Abrahams)
-//  30 Jun 00  More MSVC6 workarounds.  See comments below.  (Dave Abrahams)
-//  28 Jun 00  Removed implicit_cast<>.  See comment below. (Beman Dawes)
-//  27 Jun 00  More MSVC6 workarounds
-//  15 Jun 00  Add workarounds for MSVC6
-//   2 Feb 00  Remove bad_numeric_cast ";" syntax error (Doncho Angelov)
-//  26 Jan 00  Add missing throw() to bad_numeric_cast::what(0 (Adam Levar)
-//  29 Dec 99  Change using declarations so usages in other namespaces work
-//             correctly (Dave Abrahams)
-//  23 Sep 99  Change polymorphic_downcast assert to also detect M.I. errors
-//             as suggested Darin Adler and improved by Valentin Bonnard.
-//   2 Sep 99  Remove controversial asserts, simplify, rename.
-//  30 Aug 99  Move to cast.hpp, replace value_cast with numeric_cast,
-//             place in nested namespace.
-//   3 Aug 99  Initial version
-
-#ifndef BOOST_POLYMORPHIC_CAST_HPP
-#define BOOST_POLYMORPHIC_CAST_HPP
-
-#include <boost/config.hpp>
-
-#ifdef BOOST_HAS_PRAGMA_ONCE
-#   pragma once
-#endif
-
-# include <boost/assert.hpp>
-# include <boost/throw_exception.hpp>
-
-# include <memory>  // std::addressof
-# include <typeinfo>
-# include <type_traits>
-
-#if defined(__cpp_constexpr) && __cpp_constexpr >= 201907L
-#define BOOST_CONVERSION_IMPL_CONSTEXPR_DYN_CAST constexpr
-#else
-#define BOOST_CONVERSION_IMPL_CONSTEXPR_DYN_CAST inline
-#endif
-
-namespace boost
-{
-//  See the documentation for descriptions of how to choose between
-//  static_cast<>, dynamic_cast<>, polymorphic_cast<> and polymorphic_downcast<>
-
-//  polymorphic_cast  --------------------------------------------------------//
-
-    //  Runtime checked polymorphic downcasts and crosscasts.
-    //  Suggested in The C++ Programming Language, 3rd Ed, Bjarne Stroustrup,
-    //  section 15.8 exercise 1, page 425.
-
-    template <class Target, class Source>
-    BOOST_CONVERSION_IMPL_CONSTEXPR_DYN_CAST Target polymorphic_cast(Source* x)
-    {
-        Target tmp = dynamic_cast<Target>(x);
-        if ( tmp == 0 ) boost::throw_exception( std::bad_cast() );
-        return tmp;
-    }
-
-//  polymorphic_downcast  ----------------------------------------------------//
-
-    //  BOOST_ASSERT() checked raw pointer polymorphic downcast.  Crosscasts prohibited.
-
-    //  WARNING: Because this cast uses BOOST_ASSERT(), it violates
-    //  the One Definition Rule if used in multiple translation units
-    //  where BOOST_DISABLE_ASSERTS, BOOST_ENABLE_ASSERT_HANDLER
-    //  NDEBUG are defined inconsistently.
-
-    //  Contributed by Dave Abrahams
-
-    template <class Target, class Source>
-    BOOST_CONVERSION_IMPL_CONSTEXPR_DYN_CAST Target polymorphic_downcast(Source* x)
-    {
-        BOOST_ASSERT( dynamic_cast<Target>(x) == x );  // detect logic error
-        return static_cast<Target>(x);
-    }
-
-    //  BOOST_ASSERT() checked reference polymorphic downcast.  Crosscasts prohibited.
-
-    //  WARNING: Because this cast uses BOOST_ASSERT(), it violates
-    //  the One Definition Rule if used in multiple translation units
-    //  where BOOST_DISABLE_ASSERTS, BOOST_ENABLE_ASSERT_HANDLER
-    //  NDEBUG are defined inconsistently.
-
-    //  Contributed by Julien Delacroix
-
-    template <class Target, class Source>
-    BOOST_CONVERSION_IMPL_CONSTEXPR_DYN_CAST typename std::enable_if<
-        std::is_reference<Target>::value, Target
-    >::type polymorphic_downcast(Source& x)
-    {
-        using target_pointer_type = typename std::remove_reference<Target>::type*;
-        return *boost::polymorphic_downcast<target_pointer_type>(
-            std::addressof(x)
-        );
-    }
-
-} // namespace boost
-
-#undef BOOST_CONVERSION_IMPL_CONSTEXPR_DYN_CAST
-
-#endif  // BOOST_POLYMORPHIC_CAST_HPP
@@ -1,60 +0,0 @@
-//  boost polymorphic_pointer_cast.hpp header file  ----------------------------------------------//
-//  (C) Copyright Boris Rasin, 2014-2021.
-//  (C) Copyright Antony Polukhin, 2014-2026.
-//  Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-//  See http://www.boost.org/libs/conversion for Documentation.
-
-#ifndef BOOST_CONVERSION_POLYMORPHIC_POINTER_CAST_HPP
-#define BOOST_CONVERSION_POLYMORPHIC_POINTER_CAST_HPP
-
-#include <boost/config.hpp>
-#ifdef BOOST_HAS_PRAGMA_ONCE
-#   pragma once
-#endif
-
-# include <boost/assert.hpp>
-# include <boost/pointer_cast.hpp>
-# include <boost/throw_exception.hpp>
-
-
-namespace boost
-{
-//  See the documentation for descriptions of how to choose between
-//  static_pointer_cast<>, dynamic_pointer_cast<>, polymorphic_pointer_cast<> and polymorphic_pointer_downcast<>
-
-//  polymorphic_pointer_downcast  --------------------------------------------//
-
-    //  BOOST_ASSERT() checked polymorphic downcast.  Crosscasts prohibited.
-    //  Supports any type with static_pointer_cast/dynamic_pointer_cast functions:
-    //  built-in pointers, std::shared_ptr, boost::shared_ptr, boost::intrusive_ptr, etc.
-
-    //  WARNING: Because this cast uses BOOST_ASSERT(), it violates
-    //  the One Definition Rule if used in multiple translation units
-    //  where BOOST_DISABLE_ASSERTS, BOOST_ENABLE_ASSERT_HANDLER
-    //  NDEBUG are defined inconsistently.
-
-    //  Contributed by Boris Rasin
-
-    template <typename Target, typename Source>
-    inline auto polymorphic_pointer_downcast (const Source& x)
-        -> decltype(static_pointer_cast<Target>(x))
-    {
-        BOOST_ASSERT(dynamic_pointer_cast<Target> (x) == x);
-        return static_pointer_cast<Target> (x);
-    }
-
-    template <typename Target, typename Source>
-    inline auto polymorphic_pointer_cast (const Source& x)
-        -> decltype(dynamic_pointer_cast<Target>(x))
-    {
-        auto tmp = dynamic_pointer_cast<Target> (x);
-        if ( !tmp ) boost::throw_exception( std::bad_cast() );
-        return tmp;
-    }
-
-} // namespace boost
-
-#endif  // BOOST_CONVERSION_POLYMORPHIC_POINTER_CAST_HPP
@@ -0,0 +1,39 @@
+<html>
+
+<head>
+<meta http-equiv="Content-Language" content="en-us">
+<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
+<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
+<meta name="ProgId" content="FrontPage.Editor.Document">
+<title>Boost Conversion Library</title>
+</head>
+
+<body bgcolor="#FFFFFF" text="#000000">
+
+<h1><img border="0" src="../../c++boost.gif" align="center" width="277" height="86">Boost
+Conversion Library</h1>
+
+<p>The Conversion Library improves program safety and clarity by performing
+otherwise messy conversions.&nbsp; It includes cast-style function templates designed to complement the C++
+Standard's built-in casts.</p>
+<p>To reduce coupling, particularly to standard library IOStreams, the Boost
+Conversion Library is
+supplied by several headers:</p>
+<ul>
+  <li>The <a href="cast.htm">boost/cast</a> header provides <b>polymorphic_cast&lt;&gt;</b>
+    and <b>polymorphic_downcast&lt;&gt;</b> to perform safe casting between
+    polymorphic types, and <b> numeric_cast</b><i>&lt;&gt;</i> to perform safe casting
+    between numeric types.<br>
+  </li>
+  <li>The <a href="lexical_cast.htm">boost/lexical_cast</a> header provides <b>lexical_cast&lt;&gt;</b>
+    general literal text conversions, such as an <code>int</code> represented as
+    a <code>string</code>, or vice-versa.</li>
+</ul>
+<hr>
+<p>Revised <!--webbot bot="Timestamp" S-Type="EDITED"
+S-Format="%d %B, %Y" startspan -->06 January, 2001<!--webbot bot="Timestamp" endspan i-checksum="38320" -->
+</p>
+
+</body>
+
+</html>
@@ -1,39 +0,0 @@
-<!DOCTYPE html>
-<!--
- Copyright (c) 2016 Mikhail Maximov
- vigorous.activity at gmail dot com
-
- Copyright (c) Antony Polukhin, 2021-2026
-
- 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)
-
-boost-no-inspect
-->
-<html>
-<head>
-<meta charset="utf-8">
-<meta http-equiv="refresh" content="0; url=../../doc/html/conversion.html">
-<title>Boost.Conversion</title>
-<style>
-  body {
-    background: #fff;
-    color: #000;
-  }
-  a {
-    color: #00f;
-    text-decoration: none;
-  }
-</style>
-</head>
-<body>
-  <p>
-    Automatic redirection failed, please go to
-    <a href="../../doc/html/conversion.html">../../doc/html/conversion.html</a>
-  </p>
-  <p>
-    &copy; Antony Polukhin, 2014-2024
-  </p>
-</body>
-</html>
@@ -0,0 +1,242 @@
+<!doctype html public "-//W3C//DTD HTML Transitional 4.0//EN">
+<html>
+<head>
+    <title>lexical_cast</title>
+    <meta name="author" content="Kevlin Henney, mailto:kevlin@curbralan.com">
+    <meta name="generator" content="Microsoft FrontPage 4.0">
+</head>
+
+<body bgcolor="#FFFFFF" text="#000000">
+
+<h1><img src="../../c++boost.gif" alt="c++boost.gif (8819 bytes)" align="center" width="277" height="86">Header
+<a href="../../boost/lexical_cast.hpp">boost/lexical_cast.hpp</a></h1>
+
+<ul>
+    <li><a href="#motivation">Motivation</li>
+    <li></a><a href="#examples">Examples</li>
+    <li></a><a href="#synopsis">Synopsis</li>
+    <li></a><a href="#lexical_cast"><code>lexical_cast</code></li>
+    <li></a><a href="#bad_lexical_cast"><code>bad_lexical_cast</code></li>
+    <li></a><a href="#portability">Portability</li>
+    <li></a><a href="#future">Future directions</li>
+</ul>
+
+<hr>
+<h2><a name="motivation">Motivation</a></h2>
+
+Sometimes a value must be converted to a literal text form, such as an
+<code>int</code> represented as a <code>string</code>, or vice-versa, when
+a <code>string</code> is interpreted as an <code>int</code>. Such examples
+are common when converting between data types internal to a program and
+representation external to a program, such as windows and configuration files.
+<p>
+The standard C and C++ libraries offer a number of facilities for performing
+such conversions. However, they vary with their ease of use, extensibility,
+and safety.
+<p>
+For instance, there are a number of limitations with the family of standard C
+functions typified by <code>atoi</code>:
+<ul>
+	<li>
+	    Conversion is supported in one direction only: from text to
+		internal data type. Converting the other way using the C library
+		requires either the inconvenience and compromised safety of the
+		<code>sprintf</code> function, or the loss of portability associated
+		with non-standard functions such as <code>itoa</code>.
+	</li>
+	<li>
+	    The range of types supported is only a subset of the built-in numeric
+	    types, namely <code>int</code>, <code>long</code>,
+		and <code>double</code>.
+	</li>
+	<li>
+	    The range of types cannot be extended in a uniform manner. For
+	    instance, conversion from string representation to
+		<code>complex</code> or <code>rational</code>.
+	</li>
+</ul>
+The standard C functions typified by <code>strtol</code> have the same basic
+limitations, but offer finer control over the conversion process. However, for
+the common case such control is often either not required or not used. The
+<code>scanf</code> family of functions offer even greater control, but also
+lack safety and ease of use.
+<p>
+The standard C++ library offers <code>stringstream</code> for the kind of
+in-core formatting being discussed. It offers a great deal of control over the
+formatting and conversion of I/O to and from arbitrary types through text.
+However, for simple conversions direct use of <code>stringstream</code> can be
+either clumsy (with the introduction of extra local variables and the loss of
+infix-expression convenience) or obscure (where <code>stringstream</code>
+objects are created as temporary objects in an expression). Facets provide a
+comprehensive concept and facility for controlling textual representation, but
+their relatively high entry level requires an extreme degree of involvement
+for simple conversions.
+<p>
+The <code>lexical_cast</code> template function offers a convenient and consistent
+form for supporting common conversions to and from arbitrary types when they are
+represented as text. The simplification it offers is in expression-level
+convenience for such conversions. For more involved conversions, such as where
+precision or formatting need tighter control than is offered by the default
+behavior of <code>lexical_cast</code>, the conventional
+<code>stringstream</code> approach is recommended. Where the conversions are
+numeric to numeric, <code><a href="cast.htm#numeric_cast">numeric_cast</a></code> may offer more reasonable
+behavior than <code>lexical_cast</code>.
+<p>
+
+<hr>
+<h2><a name="examples">Examples</a></h2>
+
+The following example treats command line arguments as a sequence of numeric data:
+<blockquote>
+<pre>
+int main(int argc, char * argv[])
+{
+    using boost::lexical_cast;
+    using boost::bad_lexical_cast;
+
+    std::vector&lt;short&gt; args;
+
+    while(*++argv)
+    {
+        try
+        {
+            args.push_back(lexical_cast&lt;short&gt;(*argv));
+        }
+        catch(bad_lexical_cast &amp;)
+        {
+            args.push_back(0);
+        }
+    }
+    ...
+}
+</pre>
+</blockquote>
+
+The following example uses numeric data in a string expression:
+<blockquote>
+<pre>
+void log_message(const std::string &amp;);
+
+void log_errno(int yoko)
+{
+    log_message(&quot;Error &quot; + boost::lexical_cast&lt;std::string&gt;(yoko) + &quot;: &quot; + strerror(yoko));
+}
+</pre>
+</blockquote>
+
+<hr>
+<h2><a name="synopsis">Synopsis</a></h2>
+
+Library features defined in <a href="../../boost/lexical_cast.hpp"><code>&quot;boost/lexical_cast.hpp&quot;</code></a>:
+
+<blockquote>
+<pre>
+namespace boost
+{
+    class <a href="#bad_lexical_cast">bad_lexical_cast</a>;
+    template&lt;typename Target, typename Source&gt;
+      Target <a href="#lexical_cast">lexical_cast</a>(Source arg);
+}
+</pre>
+</blockquote>
+
+Test harness defined in <a href="lexical_cast_test.cpp"><code>&quot;lexical_cast_test.cpp&quot;</code></a>.
+<p>
+
+<hr>
+<h2><a name="lexical_cast"><code>lexical_cast</code></a></h2>
+
+<blockquote>
+<pre>
+template&lt;typename Target, typename Source&gt;
+  Target lexical_cast(Source arg);
+</pre>
+</blockquote>
+
+Returns the result of streaming <code>arg</code> into a <code>std::stringstream</code> and then
+out as a <code>Target</code> object. The conversion is parameterized by the current
+<a href="#lexical_context"><code>lexical_context</code></a>, if set. If the conversion is
+unsuccessful, a <a href="#bad_lexical_cast"><code>bad_lexical_cast</code></a> exception is thrown
+if the current <a href="#lexical_context"><code>lexical_context</code></a> is set for throwing or
+if there is no current <a href="#lexical_context"><code>lexical_context</code></a> set, otherwise a
+<code>Target()</code> is returned.
+<p>
+The requirements on the argument and result types are:
+<ul>
+	<li>
+	    <code>Source</code> is <i>OutputStreamable</i>, meaning that an
+	    <code>operator&lt;&lt;</code> is defined that takes a
+		<code>std::ostream</code> object on the left hand side and an instance
+		of the argument type on the right.
+	</li>
+	<li>
+	    Both <code>Source</code> and <code>Target</code> are <i>CopyConstructible</i> [20.1.3].
+	</li>
+	<li>
+	    <code>Target</code> is <i>InputStreamable</i>, meaning that an
+	    <code>operator&gt;&gt;</code> is defined that takes a
+		<code>std::istream</code> object on the left hand side and an instance
+		of the result type on the right.
+	</li>
+	<li>
+	    <code>Target</code> is <i>DefaultConstructible</i>, meaning that it is
+	    possible to	<i>default-initialize</i> an object of that type [8.5, 20.1.3].
+	</li>
+	<li>
+	    <code>Target</code> is <i>Assignable</i> [23.1].
+	</li>
+</ul>
+<p>
+
+<hr>
+<h2><a name="bad_lexical_cast"><code>bad_lexical_cast</code></a></h2>
+
+<blockquote>
+<pre>
+class bad_lexical_cast : public std::bad_cast
+{
+public:
+    virtual const char * what() const throw();
+};
+</pre>
+</blockquote>
+
+Exception used to indicate runtime <a href="#lexical_cast"><code>lexical_cast</code></a> failure.
+<p>
+
+<hr>
+<h2><a name="portability">Portability</a></h2>
+
+To date the code and test harness have been compiled successfully using
+Microsoft Visual C++ 6.0, Borland C++ 5.5, and GNU g++ 2.91. Tests have run successfully for
+Microsoft Visual C++ 6.0 and Borland C++ 5.5. For g++ streams interpret any integer, rather than
+just <code>0</code> and <code>1</code>, as valid for <code>bool</code>; the other tests pass
+without problem. The deprecated standard header <code>&lt;strstream&gt;</code> is used in
+preference to the standard <code>&lt;sstream&gt;</code> header for out-of-the-box g++ support.
+<p>
+
+<hr>
+<h2><a name="future">Future directions</a></h2>
+
+<ul>
+    <li>
+        A mechanism for providing quality-of-service control is needed, e.g. formatting and exception
+        behavior. In the name of simplicity (and release), the current version strips out an earlier
+        experimental version.
+    </li>
+    <li>
+        Wide character and incompatible <code>std::basic_string</code> issues need to be catered for.
+    </li>
+    <li>
+        An <code>interpret_cast</code> that performs a <i>do-something-reasonable</i> conversion between
+        types. It would, for instance, select between <code>numeric_cast</code> and <code>lexical_cast</code>
+        based on <code>std::numeric_limits<>::is_specialized</code>.
+    </li>
+</ul>
+
+<hr>
+
+<div align="right"><small><i>&copy; Copyright Kevlin Henney, 2000</i></small></div>
+
+</body>
+</html>
@@ -0,0 +1,149 @@
+//  boost lexical_cast_test.cpp program  -------------------------------------//
+
+//  See http://www.boost.org for most recent version including documentation.
+
+// what:  lexical_cast custom keyword cast tests
+// who:   contributed by Kevlin Henney
+// when:  October 2000
+// where: tested with MSVC 6.0 and BCC 5.5
+
+#include <boost/lexical_cast.hpp>
+#include "test.hpp"
+#include <complex>
+#include <iostream>
+#include <string>
+
+using namespace boost;
+using namespace std;
+
+typedef test::test<const char *, void (*)()> test_case;
+typedef const test_case * test_case_iterator;
+
+extern const test_case_iterator begin, end;
+
+int main()
+{
+    test::tester<test_case_iterator> test_suite(begin, end);
+    return test_suite() ? EXIT_SUCCESS : EXIT_FAILURE;
+}
+
+void test_to_string()
+{
+    test::check_equal(
+        lexical_cast<string>(2001), "2001",
+        "2001 -> \"2001\"");
+    test::check_equal(
+        lexical_cast<string>(2001.0), "2001",
+        "2001.0 ->\"2001\"");
+    test::check_equal(
+        lexical_cast<string>(complex<double>(2000,1)), "(2000,1)",
+        "complex<double>(2000,1) -> \"(2000,1)\"");
+}
+
+void test_to_int()
+{
+    test::check_equal(
+        lexical_cast<int>("2001"), 2001,
+        "\"2001\" -> 2001");
+    test::check_equal(
+        lexical_cast<int>("    2001"), 2001,
+        "\"    2001\" -> 2001");
+    test::check_equal(
+        lexical_cast<int>("2001    "), 2001,
+        "\"2001    \" -> 2001");
+    TEST_CHECK_THROW(
+        lexical_cast<int>("Two thousand and one"),
+        bad_lexical_cast,
+        "\"Two thousand and one\"");
+    TEST_CHECK_THROW(
+        lexical_cast<int>("2001: A Space Odyssey"),
+        bad_lexical_cast,
+        "\"2001: A Space Odyssey\"");
+    TEST_CHECK_THROW(
+        lexical_cast<int>(200.1),
+        bad_lexical_cast,
+        "200.1");
+    TEST_CHECK_THROW(
+        lexical_cast<int>("200e1"),
+        bad_lexical_cast,
+        "\"200e1\"");
+}
+
+void test_to_char()
+{
+    test::check_equal(
+        lexical_cast<char>("2"), '2',
+        "\"2\" -> '2'");
+    test::check_equal(
+        lexical_cast<char>("    2"), '2',
+        "\"    2\" -> '2'");
+    test::check_equal(
+        lexical_cast<char>("2    "), '2',
+        "\"2    \" -> '2'");
+    test::check_equal(
+        lexical_cast<char>(2), '2',
+        "2 -> '2'");
+    TEST_CHECK_THROW(
+        lexical_cast<char>("2001"),
+        bad_lexical_cast,
+        "\"2001\"");
+    TEST_CHECK_THROW(
+        lexical_cast<char>(2001),
+        bad_lexical_cast,
+        "2001");
+}
+
+void test_to_double()
+{
+    test::check_equal(
+        lexical_cast<double>("1e6"), 1e6,
+        "\"1e6\" -> 1e6");
+    test::check_equal(
+        lexical_cast<double>("1e-2"), 1e-2,
+        "\"1e-2\" -> 1e-2");
+}
+
+void test_to_bool()
+{
+    test::check_equal(
+        lexical_cast<bool>(1), true,
+        "1 -> true");
+    test::check_equal(
+        lexical_cast<bool>('0'), false,
+        "'0' -> false");
+    TEST_CHECK_THROW(
+        lexical_cast<bool>(2001),
+        bad_lexical_cast,
+        "2001");
+    TEST_CHECK_THROW(
+        lexical_cast<bool>(2),
+        bad_lexical_cast,
+        "2");
+    TEST_CHECK_THROW(
+        lexical_cast<bool>("true thousand and one"),
+        bad_lexical_cast,
+        "\"true thousand and one\"");
+}
+
+const test_case test_cases[] =
+{
+    { "lexical_cast<std::string>", test_to_string },
+    { "lexical_cast<int>",         test_to_int    },
+    { "lexical_cast<char>",        test_to_char   },
+    { "lexical_cast<double>",      test_to_double },
+    { "lexical_cast<bool>",        test_to_bool   }
+};
+
+const test_case_iterator begin = test_cases;
+const test_case_iterator end =
+    test_cases + (sizeof test_cases / sizeof *test_cases);
+
+// Copyright Kevlin Henney, 2000. All rights reserved.
+//
+// Permission to use, copy, modify, and distribute this software for any
+// purpose is hereby granted without fee, provided that this copyright and
+// permissions notice appear in all copies and derivatives, and that no
+// charge may be made for the software and its documentation except to cover
+// cost of distribution.
+//
+// This software is provided "as is" without express or implied warranty.
@@ -1,16 +0,0 @@
-{
-    "key": "conversion",
-    "name": "Conversion",
-    "authors": [
-        "Dave Abrahams",
-        "Kevlin Henney"
-    ],
-    "description": "Polymorphic casts.",
-    "category": [
-        "Miscellaneous"
-    ],
-    "maintainers": [
-        "Antony Polukhin <antoshkka -at- gmail.com>"
-    ],
-    "cxxstd": "11"
-}
@@ -0,0 +1,312 @@
+// what:  simple unit test framework
+// who:   developed by Kevlin Henney
+// when:  November 2000
+// where: tested with BCC 5.5, MSVC 6.0, and g++ 2.91
+//
+// ChangeLog:
+//      20 Jan 2001 - Fixed a warning for MSVC (Dave Abrahams)
+
+#ifndef TEST_INCLUDED
+#define TEST_INCLUDED
+
+#include <exception>
+#include <iostream>
+#include <strstream> // for out-of-the-box g++
+#include <string>
+
+namespace test // test tuple comprises name and nullary function (object)
+{
+    template<typename string_type, typename function_type>
+    struct test
+    {
+        string_type   name;
+        function_type action;
+
+        static test make(string_type name, function_type action)
+        {
+            test result; // MSVC aggreggate initializer bugs
+            result.name   = name;
+            result.action = action;
+            return result;
+        }
+    };
+}
+
+namespace test // failure exception used to indicate checked test failures
+{
+    class failure : public std::exception
+    {
+    public: // struction (default cases are OK)
+
+        failure(const std::string & why)
+          : reason(why)
+        {
+        }
+
+        // std::~string has no exception-specification (could throw anything),
+	// but we need to be compatible with std::~exception's empty one
+        // see std::15.4p13 and std::15.4p3
+        ~failure() throw()
+        {
+        }
+
+    public: // usage
+
+        virtual const char * what() const throw()
+        {
+            return reason.c_str();
+        }
+
+    private: // representation
+
+        std::string reason;
+
+    };
+}
+
+namespace test // not_implemented exception used to mark unimplemented tests
+{
+    class not_implemented : public std::exception
+    {
+    public: // usage (default ctor and dtor are OK)
+
+        virtual const char * what() const throw()
+        {
+            return "not implemented";
+        }
+
+    };
+}
+
+namespace test // test utilities
+{
+    inline void check(bool condition, const std::string & description)
+    {
+        if(!condition)
+        {
+            throw failure(description);
+        }
+    }
+
+    inline void check_true(bool value, const std::string & description)
+    {
+        check(value, "expected true: " + description);
+    }
+
+    inline void check_false(bool value, const std::string & description)
+    {
+        check(!value, "expected false: " + description);
+    }
+
+    template<typename lhs_type, typename rhs_type>
+    void check_equal(
+        const lhs_type & lhs, const rhs_type & rhs,
+        const std::string & description)
+    {
+        check(lhs == rhs, "expected equal values: " + description);
+    }
+
+    template<typename lhs_type, typename rhs_type>
+    void check_unequal(
+        const lhs_type & lhs, const rhs_type & rhs,
+        const std::string & description)
+    {
+        check(lhs != rhs, "expected unequal values: " + description);
+    }
+
+    inline void check_null(const void* ptr, const std::string & description)
+    {
+        check(!ptr, "expected null pointer: " + description);
+    }
+
+    inline void check_non_null(const void* ptr, const std::string & description)
+    {
+        check(ptr != 0, "expected non-null pointer: " + description);
+    }
+}
+
+#define TEST_CHECK_THROW(expression, exception, description) \
+    try \
+    { \
+        expression; \
+        throw ::test::failure(description); \
+    } \
+    catch(exception &) \
+    { \
+    }
+
+namespace test // memory tracking (enabled if test new and delete linked in)
+{
+    class allocations
+    {
+    public: // singleton access
+
+        static allocations & instance()
+        {
+            static allocations singleton;
+            return singleton;
+        }
+
+    public: // logging
+
+        void clear()
+        {
+            alloc_count = dealloc_count = 0;
+        }
+
+        void allocation()
+        {
+            ++alloc_count;
+        }
+
+        void deallocation()
+        {
+            ++dealloc_count;
+        }
+
+    public: // reporting
+
+        unsigned long allocated() const
+        {
+            return alloc_count;
+        }
+
+        unsigned long deallocated() const
+        {
+            return dealloc_count;
+        }
+
+        bool balanced() const
+        {
+            return alloc_count == dealloc_count;
+        }
+
+    private: // structors (default dtor is fine)
+    
+        allocations()
+          : alloc_count(0), dealloc_count(0)
+        {
+        }
+
+    private: // prevention
+
+        allocations(const allocations &);
+        allocations & operator=(const allocations &);
+
+    private: // state
+
+        unsigned long alloc_count, dealloc_count;
+
+    };
+}
+
+namespace test // tester is the driver class for a sequence of tests
+{
+    template<typename test_iterator>
+    class tester
+    {
+    public: // structors (default destructor is OK)
+
+        tester(test_iterator first_test, test_iterator after_last_test)
+          : begin(first_test), end(after_last_test)
+        {
+        }
+
+    public: // usage
+
+        bool operator()(); // returns true if all tests passed
+
+    private: // representation
+
+        test_iterator begin, end;
+
+    private: // prevention
+
+        tester(const tester &);
+        tester &operator=(const tester &);
+
+    };
+
+    template<typename test_iterator>
+    bool tester<test_iterator>::operator()()
+    {
+        using namespace std;
+
+        unsigned long passed = 0, failed = 0, unimplemented = 0;
+
+        for(test_iterator current = begin; current != end; ++current)
+        {
+            cerr << "[" << current->name << "] " << flush;
+            string result = "passed"; // optimistic
+
+            try
+            {
+                allocations::instance().clear();
+                current->action();
+
+                if(!allocations::instance().balanced())
+                {
+                    unsigned long allocated   = allocations::instance().allocated();
+                    unsigned long deallocated = allocations::instance().deallocated();
+                    ostrstream report;
+                    report << "new/delete ("
+                           << allocated << " allocated, "
+                           << deallocated << " deallocated)"
+                           << ends;
+                    const char * text = report.str();
+                    report.freeze(false);
+                    throw failure(text);
+                }
+
+                ++passed;
+            }
+            catch(const failure & caught)
+            {
+                (result = "failed: ") += caught.what();
+                ++failed;
+            }
+            catch(const not_implemented &)
+            {
+                result = "not implemented";
+                ++unimplemented;
+            }
+            catch(const exception & caught)
+            {
+                (result = "exception: ") += caught.what();
+                ++failed;
+            }
+            catch(...)
+            {
+                result = "failed with unknown exception";
+                ++failed;
+            }
+
+            cerr << result << endl;
+        }
+
+        cerr << passed + failed << " tests: "
+             << passed << " passed, "
+             << failed << " failed";
+
+        if(unimplemented)
+        {
+            cerr << " (" << unimplemented << " not implemented)";
+        }
+
+        cerr << endl;
+
+        return failed == 0;
+    }
+}
+
+#endif
+
+// Copyright Kevlin Henney, 2000. All rights reserved.
+//
+// Permission to use, copy, modify, and distribute this software for any
+// purpose is hereby granted without fee, provided that this copyright and
+// permissions notice appear in all copies and derivatives, and that no
+// charge may be made for the software and its documentation except to cover
+// cost of distribution.
+//
+// This software is provided "as is" without express or implied warranty.
@@ -1,17 +0,0 @@
-# Copyright  (c) 2016-2026 Antony Polukhin
-# 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
-
-include(BoostTest OPTIONAL RESULT_VARIABLE HAVE_BOOST_TEST)
-
-if(NOT HAVE_BOOST_TEST)
-  return()
-endif()
-
-set(BOOST_TEST_LINK_LIBRARIES Boost::conversion Boost::core)
-
-boost_test(TYPE run SOURCES cast_test.cpp)
-boost_test(TYPE run SOURCES implicit_cast.cpp)
-boost_test(TYPE compile-fail SOURCES implicit_cast_fail.cpp)
-boost_test(TYPE compile-fail SOURCES implicit_cast_fail2.cpp)
-boost_test(TYPE run SOURCES polymorphic_cast_test.cpp LINK_LIBRARIES Boost::smart_ptr)
@@ -1,31 +0,0 @@
-# Copyright (C) 2001-2003 Douglas Gregor
-# Copyright (C) Antony Polukhin, 2011-2024
-#
-# 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)
-#
-
-require-b2 5.0.1 ;
-import-search /boost/config/checks ;
-import config : requires ;
-import testing ;
-import feature ;
-
-project
-    : requirements
-        <library>/boost/conversion//boost_conversion
-        [ requires cxx11_decltype ]
-        # default to all warnings on:
-        <warnings>all
-        # set warnings as errors for those compilers we know we get warning free:
-        <toolset>gcc:<cxxflags>-Wextra
-        <toolset>gcc:<cxxflags>-Wno-uninitialized
-    ;
-
-test-suite conversion
-  : [ run implicit_cast.cpp ]
-    [ compile-fail implicit_cast_fail.cpp ]
-    [ run cast_test.cpp ]
-    [ run polymorphic_cast_test.cpp : : : <library>/boost/smart_ptr//boost_smart_ptr ]
-    [ compile-fail implicit_cast_fail2.cpp ]
-  ;
@@ -1,87 +0,0 @@
-# Use, modification, and distribution are
-# subject to the Boost Software License, Version 1.0. (See accompanying
-# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-#
-# Copyright Antony Polukhin, 2016-2025.
-
-#
-# See https://svn.boost.org/trac/boost/wiki/TravisCoverals for description of this file
-# and how it can be used with Boost libraries.
-#
-# File revision #6
-
-init:
-    # boost-local/libs/ folder to put this library into. This may be useful, if you're for example running Travis
-    # from `Boost.DLL` repo while Boost already has `dll` and with to replace `dll` with content of`Boost.DLL`.
-    #
-    # Otherwise just leave the default value - set BOOST_LIBS_FOLDER=%APPVEYOR_PROJECT_NAME%
-    - set BOOST_LIBS_FOLDER=%APPVEYOR_PROJECT_NAME%
-
-###############################################################################################################
-# From this point and below code is same for all the Boost libs
-###############################################################################################################
-
-version: 1.84.{build}-{branch}
- 
-# branches to build
-branches:
-  except:
-    - gh-pages
-
-skip_tags: true
-
-environment:
-  matrix:
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
-      TOOLSET: msvc-14.1,clang-win
-      CXXSTD: 14,17
-      ADDRMD: 32,64
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      ADDPATH: C:\cygwin\bin;
-      TOOLSET: gcc
-      CXXSTD: 03,11,14,1z
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      ADDPATH: C:\cygwin64\bin;
-      TOOLSET: gcc
-      CXXSTD: 03,11,14,1z
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      ADDPATH: C:\mingw\bin;
-      TOOLSET: gcc
-      CXXSTD: 03,11,14,1z
-    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      ADDPATH: C:\mingw-w64\x86_64-7.2.0-posix-seh-rt_v5-rev1\mingw64\bin;
-      TOOLSET: gcc
-      CXXSTD: 03,11,14,1z
-
-before_build:
-    - set BOOST_BRANCH=develop
-    - if "%APPVEYOR_REPO_BRANCH%" == "master" set BOOST_BRANCH=master
-    - echo "Testing %APPVEYOR_PROJECT_NAME%"
-    # Cloning Boost libraries (fast nondeep cloning)
-    - set BOOST=C:/boost-local
-    - git clone -b %BOOST_BRANCH% --depth 10 https://github.com/boostorg/boost.git %BOOST%
-    - cd %BOOST%
-    - git submodule update --init --depth 10 tools/build tools/boostdep
-
-    - rm -rf %BOOST%/libs/%BOOST_LIBS_FOLDER%
-    - mv -f %APPVEYOR_BUILD_FOLDER% %BOOST%/libs/%BOOST_LIBS_FOLDER%
-    - python tools/boostdep/depinst/depinst.py --git_args "--depth 10 --jobs 2" %BOOST_LIBS_FOLDER%
-
-build_script:
-    - cmd /c bootstrap
-    - b2.exe headers
-    - cd %BOOST%/libs/%BOOST_LIBS_FOLDER%/test
-
-after_build:
-before_test:
-test_script:
-  - PATH=%ADDPATH%%PATH%
-  - if not "%CXXSTD%" == "" set CXXSTD=cxxstd=%CXXSTD%
-  - if not "%ADDRMD%" == "" set ADDRMD=address-model=%ADDRMD%
-  - echo "Running command ..\..\..\b2 -j3 toolset=%TOOLSET% %CXXSTD% %ADDRMD% variant=debug,release"
-  - ..\..\..\b2.exe -j3 toolset=%TOOLSET% %CXXSTD% %ADDRMD% variant=debug,release cxxflags="-DBOOST_TRAVISCI_BUILD"
-
-after_test:
-on_success:
-on_failure:
-on_finish:
@@ -1,124 +0,0 @@
-//  boost utility cast test program  -----------------------------------------//
-
-//  (C) Copyright Beman Dawes, Dave Abrahams 1999. Distributed under the Boost
-//  Software License, Version 1.0. (See accompanying file
-//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-//  See http://www.boost.org for most recent version including documentation.
-
-//  Revision History
-//   28 Set 04  factored out numeric_cast<> test (Fernando Cacciola)
-//   20 Jan 01  removed use of <limits> for portability to raw GCC (David Abrahams)
-//   28 Jun 00  implicit_cast removed (Beman Dawes)
-//   30 Aug 99  value_cast replaced by numeric_cast
-//    3 Aug 99  Initial Version
-
-#include <iostream>
-#include <boost/polymorphic_cast.hpp>
-#include <boost/core/lightweight_test.hpp>
-
-using namespace boost;
-using std::cout;
-
-namespace
-{
-    struct Base
-    {
-        virtual char kind() { return 'B'; }
-    };
-
-    struct Base2
-    {
-        virtual char kind2() { return '2'; }
-    };
-
-    struct Derived : public Base, Base2
-    {
-        virtual char kind() { return 'D'; }
-    };
-}
-
-constexpr bool compile_time_polymorphic_cast_check() {
-#if defined(__cpp_constexpr) && __cpp_constexpr >= 201907L
-    Derived derived;
-    Base* base = &derived;
-    return polymorphic_cast<Derived*>(base) != nullptr;
-#endif
-    return true;
-}
-
-static_assert(
-    compile_time_polymorphic_cast_check(),
-    "polymorphic_cast does not work at compile time"
-);
-
-constexpr bool compile_time_polymorphic_downcast_check() {
-#if defined(__cpp_constexpr) && __cpp_constexpr >= 201907L
-    Derived derived;
-    Base* base = &derived;
-    return polymorphic_downcast<Derived*>(base) != nullptr;
-#endif
-    return true;
-}
-
-static_assert(
-    compile_time_polymorphic_downcast_check(),
-    "polymorphic_downcast does not work at compile time"
-);
-
-constexpr bool compile_time_polymorphic_downcast2_check() {
-#if defined(__cpp_constexpr) && __cpp_constexpr >= 201907L
-    Derived derived;
-    Base& base = derived;
-    Derived& derived_again = polymorphic_downcast<Derived&>(base);
-    (void)derived_again;
-#endif
-    return true;
-}
-
-static_assert(
-    compile_time_polymorphic_downcast2_check(),
-    "polymorphic_downcast does not work at compile time"
-);
-
-int main( int argc, char * argv[] )
-{
-#   ifdef NDEBUG
-        cout << "NDEBUG is defined\n";
-#   else
-        cout << "NDEBUG is not defined\n";
-#   endif
-
-    cout << "\nBeginning tests...\n";
-
-//  test polymorphic_cast  ---------------------------------------------------//
-
-    //  tests which should succeed
-    Derived derived_instance;
-    Base * base = &derived_instance;
-    Derived * derived = polymorphic_downcast<Derived*>( base );  // downcast
-    BOOST_TEST( derived->kind() == 'D' );
-
-    derived = polymorphic_cast<Derived*>( base ); // downcast, throw on error
-    BOOST_TEST( derived->kind() == 'D' );
-
-    Base2 *   base2 =  polymorphic_cast<Base2*>( base ); // crosscast
-    BOOST_TEST( base2->kind2() == '2' );
-
-     //  tests which should result in errors being detected
-    Base base_instance;
-    base = &base_instance;
-
-    if ( argc > 1 && *argv[1] == '1' )
-        { derived = polymorphic_downcast<Derived*>( base ); } // #1 assert failure
-
-    bool caught_exception = false;
-    try { derived = polymorphic_cast<Derived*>( base ); }
-    catch (const std::bad_cast&)
-        { cout<<"caught bad_cast\n"; caught_exception = true; }
-    BOOST_TEST( caught_exception );
-    //  the following is just so generated code can be inspected
-    BOOST_TEST( derived->kind() != 'B' );
-
-    return boost::report_errors();
-}   // main
@@ -1,43 +0,0 @@
-// Copyright David Abrahams 2003.
-// 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)
-
-#include <boost/implicit_cast.hpp>
-#include <boost/core/lightweight_test.hpp>
-#include <boost/type.hpp>
-
-using boost::implicit_cast;
-using boost::type;
-
-template <class T>
-type<T> check_return(T) { return type<T>(); }
-
-struct foo
-{
-    foo(char const*) {}
-    operator long() const { return 0; }
-};
-
-using long_type = type<long>;
-using foo_type = type<foo>;
-
-int main()
-{
-    type<long> x = check_return(boost::implicit_cast<long>(1));
-    BOOST_TEST(boost::implicit_cast<long>(1) == 1L);
-
-    type<foo> f = check_return(boost::implicit_cast<foo>("hello"));
-    type<long> z = check_return(boost::implicit_cast<long>(foo("hello")));
-
-    // warning suppression:
-    (void)x;
-    (void)f;
-    (void)z;
-
-
-    constexpr long value = boost::implicit_cast<long>(42);
-    BOOST_TEST(value == 42L);
-
-    return boost::report_errors();
-}
@@ -1,20 +0,0 @@
-// Copyright David Abrahams 2003.
-// 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)
-
-#include <boost/implicit_cast.hpp>
-
-using boost::implicit_cast;
-
-struct foo
-{
-    explicit foo(char const*) {}
-};
-
-int main()
-{
-    foo x = implicit_cast<foo>("foobar");
-    (void)x;            // warning suppression.
-    return 0;
-}
@@ -1,19 +0,0 @@
-//
-// Test that implicit_cast requires a template argument
-//
-// Copyright 2014 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
-//
-
-#include <boost/implicit_cast.hpp>
-
-int main()
-{
-    int x = boost::implicit_cast( 1 );
-    (void)x;
-
-    return 0;
-}
@@ -1,383 +0,0 @@
-//
-// Test boost::polymorphic_cast, boost::polymorphic_downcast and 
-// boost::polymorphic_pointer_cast, boost::polymorphic_pointer_downcast
-//
-// Copyright 1999 Beman Dawes
-// Copyright 1999 Dave Abrahams
-// Copyright 2014 Peter Dimov
-// Copyright 2014 Boris Rasin, Antony Polukhin
-// Copyright 2023 Antony Polukhin
-//
-// 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
-//
-
-#define BOOST_ENABLE_ASSERT_HANDLER
-#include <boost/polymorphic_cast.hpp>
-#include <boost/polymorphic_pointer_cast.hpp>
-#include <boost/smart_ptr/shared_ptr.hpp>
-#include <boost/smart_ptr/intrusive_ptr.hpp>
-#include <boost/smart_ptr/intrusive_ref_counter.hpp>
-#include <boost/core/lightweight_test.hpp>
-#include <string>
-#include <memory>
-
-static bool expect_assertion = false;
-static int assertion_failed_count = 0;
-
-//assertion handler throws it to exit like assert, but to be able to catch it and stop
-//usage: BOOST_TEST_THROWS( function_with_assert(), expected_assertion );
-struct expected_assertion {};
-
-// BOOST_ASSERT custom handler
-void boost::assertion_failed( char const * expr, char const * function, char const * file, long line )
-{
-    if( expect_assertion )
-    {
-        ++assertion_failed_count;
-        throw expected_assertion();
-    }
-    else
-    {
-        BOOST_ERROR( "unexpected assertion" );
-
-        BOOST_LIGHTWEIGHT_TEST_OSTREAM
-          << file << "(" << line << "): assertion '" << expr << "' failed in function '"
-          << function << "'" << std::endl;
-    }
-}
-
-//
-
-struct Base : boost::intrusive_ref_counter<Base>
-{
-    virtual ~Base() {}
-    virtual std::string kind() { return "Base"; }
-};
-
-struct Base2
-{
-    virtual ~Base2() {}
-    virtual std::string kind2() { return "Base2"; }
-};
-
-struct Derived : public Base, Base2
-{
-    virtual std::string kind() { return "Derived"; }
-};
-
-static void test_polymorphic_cast()
-{
-    Base * base = new Derived;
-
-    Derived * derived;
-    
-    try
-    {
-        derived = boost::polymorphic_cast<Derived*>( base );
-
-        BOOST_TEST( derived != 0 );
-
-        if( derived != 0 )
-        {
-            BOOST_TEST_EQ( derived->kind(), "Derived" );
-        }
-    }
-    catch( std::bad_cast const& )
-    {
-        BOOST_ERROR( "boost::polymorphic_cast<Derived*>( base ) threw std::bad_cast" );
-    }
-
-    Base2 * base2;
-
-    try
-    {
-        base2 = boost::polymorphic_cast<Base2*>( base ); // crosscast
-
-        BOOST_TEST( base2 != 0 );
-
-        if( base2 != 0 )
-        {
-            BOOST_TEST_EQ( base2->kind2(), "Base2" );
-        }
-    }
-    catch( std::bad_cast const& )
-    {
-        BOOST_ERROR( "boost::polymorphic_cast<Base2*>( base ) threw std::bad_cast" );
-    }
-
-    delete base;
-}
-
-static void test_polymorphic_pointer_cast()
-{
-    Base * base = new Derived;
-
-    Derived * derived;
-
-    try
-    {
-        derived = boost::polymorphic_pointer_cast<Derived>( base );
-
-        BOOST_TEST( derived != 0 );
-
-        if( derived != 0 )
-        {
-            BOOST_TEST_EQ( derived->kind(), "Derived" );
-        }
-    }
-    catch( std::bad_cast const& )
-    {
-        BOOST_ERROR( "boost::polymorphic_pointer_cast<Derived>( base ) threw std::bad_cast" );
-    }
-
-    Base2 * base2;
-
-    try
-    {
-        base2 = boost::polymorphic_pointer_cast<Base2>( base ); // crosscast
-
-        BOOST_TEST( base2 != 0 );
-
-        if( base2 != 0 )
-        {
-            BOOST_TEST_EQ( base2->kind2(), "Base2" );
-        }
-    }
-    catch( std::bad_cast const& )
-    {
-        BOOST_ERROR( "boost::polymorphic_pointer_cast<Base2>( base ) threw std::bad_cast" );
-    }
-
-    boost::shared_ptr<Base> sp_base( base );
-    boost::shared_ptr<Base2> sp_base2;
-    try
-    {
-        sp_base2 = boost::polymorphic_pointer_cast<Base2>( sp_base ); // crosscast
-
-        BOOST_TEST( sp_base2 != 0 );
-
-        if( sp_base2 != 0 )
-        {
-            BOOST_TEST_EQ( sp_base2->kind2(), "Base2" );
-        }
-    }
-    catch( std::bad_cast const& )
-    {
-        BOOST_ERROR( "boost::polymorphic_pointer_cast<Base2>( sp_base ) threw std::bad_cast" );
-    }
-
-    // we do not `delete base;` because sahred_ptr is holding base
-}
-
-static void test_polymorphic_downcast()
-{
-    Base *base_pointer = new Derived;
-
-    // test raw pointer cast
-    Derived *derived_pointer = boost::polymorphic_downcast<Derived *>(base_pointer);
-
-    BOOST_TEST(derived_pointer != 0);
-
-    if (derived_pointer != 0)
-    {
-        BOOST_TEST_EQ(derived_pointer->kind(), "Derived");
-    }
-
-    // test reference cast
-    Derived& derived_ref = boost::polymorphic_downcast<Derived&>(*base_pointer);
-    BOOST_TEST_EQ(derived_ref.kind(), "Derived");
-
-    delete base_pointer;
-}
-
-static void test_polymorphic_pointer_downcast_builtin()
-{
-    Base * base = new Derived;
-
-    Derived * derived = boost::polymorphic_pointer_downcast<Derived>( base );
-
-    BOOST_TEST( derived != 0 );
-
-    if( derived != 0 )
-    {
-        BOOST_TEST_EQ( derived->kind(), "Derived" );
-    }
-
-    // polymorphic_pointer_downcast can't do crosscasts
-
-    delete base;
-}
-
-static void test_polymorphic_pointer_downcast_boost_shared()
-{
-    boost::shared_ptr<Base> base (new Derived);
-
-    boost::shared_ptr<Derived> derived = boost::polymorphic_pointer_downcast<Derived>( base );
-
-    BOOST_TEST( derived != 0 );
-
-    if( derived != 0 )
-    {
-        BOOST_TEST_EQ( derived->kind(), "Derived" );
-    }
-}
-
-static void test_polymorphic_pointer_downcast_intrusive()
-{
-    boost::intrusive_ptr<Base> base (new Derived);
-
-    boost::intrusive_ptr<Derived> derived = boost::polymorphic_pointer_downcast<Derived>( base );
-
-    BOOST_TEST( derived != 0 );
-
-    if( derived != 0 )
-    {
-        BOOST_TEST_EQ( derived->kind(), "Derived" );
-    }
-}
-
-static void test_polymorphic_pointer_downcast_std_shared()
-{
-    std::shared_ptr<Base> base (new Derived);
-
-    std::shared_ptr<Derived> derived = boost::polymorphic_pointer_downcast<Derived>( base );
-
-    BOOST_TEST( derived != 0 );
-
-    if( derived != 0 )
-    {
-        BOOST_TEST_EQ( derived->kind(), "Derived" );
-    }
-}
-
-static void test_polymorphic_cast_fail()
-{
-    Base * base = new Base;
-
-    BOOST_TEST_THROWS( boost::polymorphic_cast<Derived*>( base ), std::bad_cast );
-
-    delete base;
-}
-
-static void test_polymorphic_pointer_cast_fail()
-{
-    Base * base = new Base;
-    BOOST_TEST_THROWS( boost::polymorphic_pointer_cast<Derived>( base ), std::bad_cast );
-    delete base;
-
-    BOOST_TEST_THROWS( boost::polymorphic_pointer_cast<Derived>( boost::shared_ptr<Base>(new Base) ), std::bad_cast );
-
-    BOOST_TEST_THROWS( boost::polymorphic_pointer_cast<Derived>( std::shared_ptr<Base>(new Base) ), std::bad_cast );
-
-    BOOST_TEST_THROWS( boost::polymorphic_pointer_cast<Derived>( boost::intrusive_ptr<Base>(new Base) ), std::bad_cast );
-}
-
-static void test_polymorphic_downcast_fail()
-{
-    Base * base_pointer = new Base;
-
-    {
-        // test raw pointer cast
-
-        int old_count = assertion_failed_count;
-        expect_assertion = true;
-
-        BOOST_TEST_THROWS(boost::polymorphic_downcast<Derived *>(base_pointer), expected_assertion); // should assert
-
-        BOOST_TEST_EQ(assertion_failed_count, old_count + 1);
-        expect_assertion = false;
-    }
-    {
-        // test reference cast
-
-        int old_count = assertion_failed_count;
-        expect_assertion = true;
-
-        BOOST_TEST_THROWS(boost::polymorphic_downcast<Derived &>(*base_pointer), expected_assertion); // should assert
-
-        BOOST_TEST_EQ(assertion_failed_count, old_count + 1);
-        expect_assertion = false;
-    }
-
-    delete base_pointer;
-}
-
-static void test_polymorphic_pointer_downcast_builtin_fail()
-{
-    Base * base = new Base;
-
-    int old_count = assertion_failed_count;
-    expect_assertion = true;
-
-    BOOST_TEST_THROWS( boost::polymorphic_pointer_downcast<Derived>( base ), expected_assertion ); // should assert
-
-    BOOST_TEST_EQ( assertion_failed_count, old_count + 1 );
-    expect_assertion = false;
-
-    delete base;
-}
-
-static void test_polymorphic_pointer_downcast_boost_shared_fail()
-{
-    boost::shared_ptr<Base> base (new Base);
-
-    int old_count = assertion_failed_count;
-    expect_assertion = true;
-
-    BOOST_TEST_THROWS( boost::polymorphic_pointer_downcast<Derived>( base ), expected_assertion ); // should assert
-
-    BOOST_TEST_EQ( assertion_failed_count, old_count + 1 );
-    expect_assertion = false;
-}
-
-
-static void test_polymorphic_pointer_downcast_std_shared_fail()
-{
-    std::shared_ptr<Base> base (new Base);
-
-    int old_count = assertion_failed_count;
-    expect_assertion = true;
-
-    BOOST_TEST_THROWS( boost::polymorphic_pointer_downcast<Derived>( base ), expected_assertion ); // should assert
-
-    BOOST_TEST_EQ( assertion_failed_count, old_count + 1 );
-    expect_assertion = false;
-}
-
-
-static void test_polymorphic_pointer_downcast_intrusive_fail()
-{
-    boost::intrusive_ptr<Base> base (new Base);
-
-    int old_count = assertion_failed_count;
-    expect_assertion = true;
-
-    BOOST_TEST_THROWS( boost::polymorphic_pointer_downcast<Derived>( base ), expected_assertion); // should assert
-
-    BOOST_TEST_EQ( assertion_failed_count, old_count + 1 );
-    expect_assertion = false;
-}
-
-int main()
-{
-    test_polymorphic_cast();
-    test_polymorphic_pointer_cast();
-    test_polymorphic_downcast();
-    test_polymorphic_pointer_downcast_builtin();
-    test_polymorphic_pointer_downcast_boost_shared();
-    test_polymorphic_pointer_downcast_intrusive();
-    test_polymorphic_cast_fail();
-    test_polymorphic_pointer_cast_fail();
-    test_polymorphic_downcast_fail();
-    test_polymorphic_pointer_downcast_builtin_fail();
-    test_polymorphic_pointer_downcast_boost_shared_fail();
-    test_polymorphic_pointer_downcast_intrusive_fail();
-
-    test_polymorphic_pointer_downcast_std_shared();
-    test_polymorphic_pointer_downcast_std_shared_fail();
-
-
-    return boost::report_errors();
-}