Update copyright years

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v2...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/dependabot.yml

@@ -0,0 +1,11 @@
+# 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"

.github/workflows/ci.yml

@@ -0,0 +1,182 @@
+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

CMakeLists.txt

@@ -0,0 +1,22 @@
+# 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()

README.md

@@ -0,0 +1,15 @@
+# [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).

build.jam

@@ -0,0 +1,25 @@
+# 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
+    ;
+

cast.htm

@@ -1,150 +0,0 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
-
-<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="middle" 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 header <a href="../../boost/cast.hpp">boost/cast.hpp</a>
-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 <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. 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
-<b>Y</b> diagram hierarchy.</p>
-<p>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.</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.</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. 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. It must also be used for crosscasts. 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. [See ISO Std 3.2]</p>
-<p>The C++ built-in <b>dynamic_cast</b> 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.</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 <!--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>

cast_test.cpp

@@ -1,154 +0,0 @@
-//  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 <cfloat>   // for DBL_MAX (Peter Schmid)
-#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

doc/Jamfile.v2

@@ -0,0 +1,38 @@
+#   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 ;

doc/conversion.qbk

@@ -0,0 +1,215 @@
+[/
+    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]

include/boost/cast.hpp

@@ -1,385 +0,0 @@
-//  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/libs/conversion for 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>
-# include <boost/detail/select_type.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  ------------------------------------------------------------//
-
-#if !defined(BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS) || defined(BOOST_SGI_CPP_LIMITS)
-  
-    namespace detail
-    {
-      template <class T>
-      struct signed_numeric_limits : std::numeric_limits<T>
-      {
-             static inline 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();
-         };
-      };
-   
-      // Move to namespace boost in utility.hpp?
-      template <class T, bool specialized>
-      struct fixed_numeric_limits_base
-          : public if_true< std::numeric_limits<T>::is_signed >
-           ::BOOST_NESTED_TEMPLATE then< signed_numeric_limits<T>,
-                            std::numeric_limits<T>
-                   >::type
-      {};
-      
-      template <class T>
-      struct fixed_numeric_limits
-          : fixed_numeric_limits_base<T,(std::numeric_limits<T>::is_specialized)>
-      {};
-
-# ifdef BOOST_HAS_LONG_LONG
-      // cover implementations which supply no specialization for long
-      // long / unsigned long long. Not intended to be full
-      // numeric_limits replacements, but good enough for numeric_cast<>
-      template <>
-      struct fixed_numeric_limits_base<long long, false>
-      {
-          BOOST_STATIC_CONSTANT(bool, is_specialized = true);
-          BOOST_STATIC_CONSTANT(bool, is_signed = true);
-          static long long max()
-          {
-#  ifdef LONGLONG_MAX
-              return LONGLONG_MAX;
-#  else
-              return 9223372036854775807LL; // hope this is portable
-#  endif 
-          }
-
-          static long long min()
-          {
-#  ifdef LONGLONG_MIN
-              return LONGLONG_MIN;
-#  else  
-              return -9223372036854775808LL; // hope this is portable
-#  endif 
-          }
-      };
-
-      template <>
-      struct fixed_numeric_limits_base<unsigned long long, false>
-      {
-          BOOST_STATIC_CONSTANT(bool, is_specialized = true);
-          BOOST_STATIC_CONSTANT(bool, is_signed = false);
-          static unsigned long long max()
-          {
-#  ifdef ULONGLONG_MAX
-              return ULONGLONG_MAX;
-#  else
-              return 0xffffffffffffffffULL; // hope this is portable
-#  endif 
-          }
-
-          static unsigned long long min() { return 0; }
-      };
-# endif 
-    } // 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; }
-        
-# if defined(BOOST_MSVC) && BOOST_MSVC <= 1200
-        // MSVC6 can't static_cast  unsigned __int64 -> floating types
-#  define BOOST_UINT64_CAST(src_type)                                   \
-        static inline bool check(src_type x, unsigned __int64)          \
-        {                                                               \
-            if (x < 0) return false;                                    \
-            unsigned __int64 y = static_cast<unsigned __int64>(x);      \
-            bool odd = y & 0x1;                                         \
-            __int64 div2 = static_cast<__int64>(y >> 1);                \
-            return ((static_cast<src_type>(div2) * 2.0) + odd) != x;    \
-        }
-
-        BOOST_UINT64_CAST(long double);
-        BOOST_UINT64_CAST(double);
-        BOOST_UINT64_CAST(float);
-#  undef BOOST_UINT64_CAST
-# endif 
-    };
-
-    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 detail::fixed_numeric_limits<Source> arg_traits;
-        typedef detail::fixed_numeric_limits<Target> result_traits;
-        
-#if defined(BOOST_STRICT_CONFIG) \
-    || (!defined(__HP_aCC) || __HP_aCC > 33900) \
-         && (!defined(BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS) \
-             || defined(BOOST_SGI_CPP_LIMITS))
-        // 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

include/boost/implicit_cast.hpp

@@ -0,0 +1,38 @@
+// 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

include/boost/lexical_cast.hpp

@@ -1,207 +0,0 @@
-#ifndef BOOST_LEXICAL_CAST_INCLUDED
-#define BOOST_LEXICAL_CAST_INCLUDED
-
-// Boost lexical_cast.hpp header  -------------------------------------------//
-//
-// See http://www.boost.org for most recent version including documentation.
-// See end of this header for rights and permissions.
-//
-// what:  lexical_cast custom keyword cast
-// who:   contributed by Kevlin Henney,
-//        enhanced with contributions from Terje Slettebø,
-//        with additional fixes and suggestions from Gennaro Prota,
-//        Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov,
-//        and other Boosters
-// when:  November 2000, March 2003
-
-#include <string>
-#include <typeinfo>
-#include <boost/config.hpp>
-#include <boost/limits.hpp>
-#include <boost/type_traits/is_pointer.hpp>
-
-#ifdef BOOST_NO_STRINGSTREAM
-#include <strstream>
-#else
-#include <sstream>
-#endif
-
-#if defined(BOOST_NO_STRINGSTREAM) || \
-    defined(BOOST_NO_STD_WSTRING) || \
-    defined(BOOST_NO_STD_LOCALE) || \
-    defined(BOOST_NO_CWCHAR) || \
-    defined(BOOST_MSVC) && (BOOST_MSVC <= 1200)
-#define DISABLE_WIDE_CHAR_SUPPORT
-#endif
-
-#ifdef BOOST_NO_INTRINSIC_WCHAR_T
-#include <cwchar>
-#endif
-
-namespace boost
-{
-    // exception used to indicate runtime lexical_cast failure
-    class bad_lexical_cast : public std::bad_cast
-    {
-    public:
-        virtual ~bad_lexical_cast() throw()
-        {
-        }
-    };
-
-    namespace detail // actual underlying concrete exception type
-    {
-        template<typename Target, typename Source>
-        class no_lexical_conversion : public bad_lexical_cast
-        {
-        public:
-            no_lexical_conversion()
-              : description(
-                  std::string() + "bad lexical cast: " +
-                  "source type value could not be interpreted as target, Target=" +
-                  typeid(Target).name() + ", Source=" + typeid(Source).name())
-            {
-            }
-            virtual ~no_lexical_conversion() throw()
-            {
-            }
-            virtual const char *what() const throw()
-            {
-                return description.c_str();
-            }
-        private:
-            const std::string description; // static initialization fails on MSVC6
-        };
-    }
-
-    namespace detail // selectors for choosing stream character type
-    {
-        template<typename Type>
-        struct stream_char
-        {
-            typedef char type;
-        };
-
-        #ifndef DISABLE_WIDE_CHAR_SUPPORT
-        template<>
-        struct stream_char<wchar_t>
-        {
-            typedef wchar_t type;
-        };
-
-        template<>
-        struct stream_char<wchar_t *>
-        {
-            typedef wchar_t type;
-        };
-
-        template<>
-        struct stream_char<const wchar_t *>
-        {
-            typedef wchar_t type;
-        };
-
-        template<>
-        struct stream_char<std::wstring>
-        {
-            typedef wchar_t type;
-        };
-        #endif
-
-        template<typename TargetChar, typename SourceChar>
-        struct widest_char
-        {
-            typedef TargetChar type;
-        };
-
-        template<>
-        struct widest_char<char, wchar_t>
-        {
-            typedef wchar_t type;
-        };
-    }
-    
-    namespace detail // stream wrapper for handling lexical conversions
-    {
-        template<typename Target, typename Source>
-        class lexical_stream
-        {
-        public:
-            lexical_stream()
-            {
-                stream.unsetf(std::ios::skipws);
-
-                if(std::numeric_limits<Target>::is_specialized)
-                    stream.precision(std::numeric_limits<Target>::digits10 + 1);
-                else if(std::numeric_limits<Source>::is_specialized)
-                    stream.precision(std::numeric_limits<Source>::digits10 + 1);
-            }
-            ~lexical_stream()
-            {
-                #if defined(BOOST_NO_STRINGSTREAM)
-                stream.freeze(false);
-                #endif
-            }
-            bool operator<<(const Source &input)
-            {
-                return stream << input;
-            }
-            template<typename InputStreamable>
-            bool operator>>(InputStreamable &output)
-            {
-                return !is_pointer<InputStreamable>::value &&
-                       stream >> output &&
-                       (stream >> std::ws).eof();
-            }
-            bool operator>>(std::string &output)
-            {
-                #if defined(BOOST_NO_STRINGSTREAM)
-                stream << '\0';
-                #endif
-                output = stream.str();
-                return true;
-            }
-            #ifndef DISABLE_WIDE_CHAR_SUPPORT
-            bool operator>>(std::wstring &output)
-            {
-                output = stream.str();
-                return true;
-            }
-            #endif
-        private:
-            typedef typename widest_char<
-                typename stream_char<Target>::type,
-                typename stream_char<Source>::type>::type char_type;
-
-            #if defined(BOOST_NO_STRINGSTREAM)
-            std::strstream stream;
-            #elif defined(BOOST_NO_STD_LOCALE)
-            std::stringstream stream;
-            #else
-            std::basic_stringstream<char_type> stream;
-            #endif
-        };
-    }
-
-    template<typename Target, typename Source>
-    Target lexical_cast(Source arg)
-    {
-        detail::lexical_stream<Target, Source> interpreter;
-        Target result;
-
-        if(!(interpreter << arg && interpreter >> result))
-            throw detail::no_lexical_conversion<Target, Source>();
-        return result;
-    }
-}
-
-// Copyright Kevlin Henney, 2000-2003. 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.
-//
-// This software is provided "as is" without express or implied warranty.
-
-#undef DISABLE_WIDE_CHAR_SUPPORT
-#endif

include/boost/polymorphic_cast.hpp

@@ -0,0 +1,132 @@
+//  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

include/boost/polymorphic_pointer_cast.hpp

@@ -0,0 +1,60 @@
+//  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

index.htm

@@ -1,39 +0,0 @@
-<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>

index.html

@@ -0,0 +1,39 @@
+<!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>

lexical_cast.htm

@@ -1,223 +0,0 @@
-<!-- saved from url=(0022)http://internet.e-mail -->
-<!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 type="square">
-			<li>
-				<a href="#motivation">Motivation</a></li>
-			<li>
-				<a href="#examples">Examples</a></li>
-			<li>
-				<a href="#synopsis">Synopsis</a></li>
-			<li>
-				<a href="#lexical_cast"><code>lexical_cast</code></a></li>
-			<li>
-				<a href="#bad_lexical_cast"><code>bad_lexical_cast</code></a></li>
-			<li>
-				<a href="#changes">Changes</a></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 type="square">
-				<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 perceived complexity and high entry level requires an extreme degree of 
-		involvement for simple conversions, and excludes all but a few programmers.
-		<p>
-			The <code>lexical_cast</code> function template 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>
-			For a good discussion of the options and issues involved in string-based 
-			formatting, including comparison of <code>stringstream</code>, <code>lexical_cast</code>, 
-			and others, see Herb Sutter's article, <a href="http://www.gotw.ca/publications/mill19.htm">
-				<i>The String Formatters of Manor Farm</i></a>.
-		<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>Unit test 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
-			standard library string-based stream and then out as a <code>Target</code> object.
-			Where <code>Target</code> is either <code>std::string</code>
-			or <code>std::wstring</code>, stream extraction takes the whole content
-			of the string, including spaces, rather than relying on the default
-			<code>operator&gt;&gt;</code> behavior.
-			If the conversion is unsuccessful, a <a href="#bad_lexical_cast">
-				<code>bad_lexical_cast</code></a> exception is thrown.
-		<p>
-			The requirements on the argument and result types are:
-			<ul type="square">
-				<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> or <code>std::wostream</code> object on the
-					left hand side and an instance of the argument type on the right.
-				</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> or <code>std::wistream</code> object on the left hand side 
-					and an instance of the result 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>DefaultConstructible</i>, meaning that it is possible 
-					to <i>default-initialize</i> an object of that type [8.5, 20.1.4].
-				</li>
-			</ul>
-			The character type of the underlying stream is assumed to be <code>char</code> unless
-			either the <code>Source</code> or the <code>Target</code> requires wide-character
-			streaming, in which case the underlying stream uses <code>wchar_t</code>.
-			<code>Source</code> types that require wide-character streaming are <code>wchar_t</code>,
-			<code>wchar_t *</code>, and <code>std::wstring</code>. <code>Target</code> types that
-			require wide-character streaming are <code>wchar_t</code> and <code>std::wstring</code>.
-			<p>
-			Where a higher degree of control is required over conversions, <code>std::stringstream</code>
-			and <code>std::wstringstream</code> offer a more appropriate path. Where non-stream-based conversions are 
-			required, <code>lexical_cast</code>
-		is the wrong tool for the job and is not special-cased for such scenarios.
-		<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:
-    ... // <i>same member function interface as</i> std::exception
-};
-</pre>
-			</blockquote>Exception used to indicate runtime <a href="#lexical_cast"><code>lexical_cast</code></a>
-		failure.
-			<hr>
-		<h2><a name="changes">Changes</a></h2>
-	<ul type="square">
-	<li>The previous version of <code>lexical_cast</code> used the default stream precision for reading
-	and writing floating-point numbers. For numerics that have a corresponding specialization of
-	<code>std::numeric_limits</code>, the current version now chooses a precision to match.
-	<li>The previous version of <code>lexical_cast</code> did not support conversion to or from any
-	wide-character-based types. For compilers with full language and library support for wide characters,
-	<code>lexical_cast</code> now supports conversions from <code>wchar_t</code>, <code>wchar_t *</code>,
-	and <code>std::wstring</code> and to <code>wchar_t</code> and <code>std::wstring</code>.
-	<li>The previous version of <code>lexical_cast</code> assumed that the conventional stream extractor
-	operators were sufficient for reading values. However, string I/O is asymmetric, with the result
-	that spaces play the role of I/O separators rather than string content. The current version fixes
-	this error for <code>std::string</code> and, where supported, <code>std::wstring</code>:
-	<code>lexical_cast&lt;std::string&gt;("Hello, World")</code> succeeds instead of failing with
-	a <code>bad_lexical_cast</code> exception.
-	<li>The previous version of <code>lexical_cast</code> allowed unsafe and meaningless conversions to
-	pointers. The current version now throws a <code>bad_lexical_cast</code> for conversions to pointers:
-	<code>lexical_cast&lt;char *&gt;("Goodbye, World")</code> now throws an exception instead of
-	causing undefined behavior.
-	</ul>
-	<p>
-			<hr>
-			<div align="right"><small><i>&copy; Copyright Kevlin Henney, 2000&#150;2003</i></small></div>
-	</body>
-</html>

lexical_cast_test.cpp

@@ -1,278 +0,0 @@
-// Unit test for boost::lexical_cast.
-//
-// See http://www.boost.org for most recent version, including documentation.
-//
-// Copyright Terje Slettebø and Kevlin Henney, 2003.
-//
-// 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.
-//
-// This software is provided "as is" without express or implied warranty.
-
-#include <boost/config.hpp>
-
-#if defined(__INTEL_COMPILER)
-#pragma warning(disable: 193 383 488 981 1418 1419)
-#elif defined(BOOST_MSVC)
-#pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
-#endif
-
-#include <boost/lexical_cast.hpp>
-#include <boost/test/floating_point_comparison.hpp>
-#include <boost/test/included/unit_test_framework.hpp>
-
-#if defined(BOOST_NO_STRINGSTREAM) || \
-    defined(BOOST_NO_STD_WSTRING) || \
-    defined(BOOST_NO_STD_LOCALE) || \
-    defined(BOOST_NO_CWCHAR) || \
-    defined(BOOST_MSVC) && (BOOST_MSVC <= 1200)
-#define DISABLE_WIDE_CHAR_SUPPORT
-#endif
-
-using namespace boost;
-
-void test_conversion_to_char();
-void test_conversion_to_int();
-void test_conversion_to_double();
-void test_conversion_to_bool();
-void test_conversion_to_string();
-void test_conversion_to_pointer();
-void test_conversion_from_wchar_t();
-void test_conversion_to_wchar_t();
-void test_conversion_from_wstring();
-void test_conversion_to_wstring();
-
-unit_test_framework::test_suite *init_unit_test_suite(int, char **)
-{
-    unit_test_framework::test_suite *suite =
-        BOOST_TEST_SUITE("lexical_cast unit test");
-    suite->add(BOOST_TEST_CASE(test_conversion_to_char));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_int));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_double));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_bool));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_pointer));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_string));
-    #ifndef DISABLE_WIDE_CHAR_SUPPORT
-    suite->add(BOOST_TEST_CASE(test_conversion_from_wchar_t));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_wchar_t));
-    suite->add(BOOST_TEST_CASE(test_conversion_from_wstring));
-    suite->add(BOOST_TEST_CASE(test_conversion_to_wstring));
-    #endif
-    return suite;
-}
-
-void test_conversion_to_char()
-{
-    BOOST_CHECK_EQUAL('A', lexical_cast<char>('A'));
-    BOOST_CHECK_EQUAL(' ', lexical_cast<char>(' '));
-    BOOST_CHECK_EQUAL('1', lexical_cast<char>(1));
-    BOOST_CHECK_EQUAL('0', lexical_cast<char>(0));
-    BOOST_CHECK_THROW(lexical_cast<char>(123), boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL('1', lexical_cast<char>(1.0));
-    BOOST_CHECK_EQUAL('1', lexical_cast<char>(true));
-    BOOST_CHECK_EQUAL('0', lexical_cast<char>(false));
-    BOOST_CHECK_EQUAL('A', lexical_cast<char>("A"));
-    BOOST_CHECK_EQUAL(' ', lexical_cast<char>(" "));
-    BOOST_CHECK_THROW(lexical_cast<char>(""), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<char>("Test"), boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL('A', lexical_cast<char>(std::string("A")));
-    BOOST_CHECK_EQUAL(' ', lexical_cast<char>(std::string(" ")));
-    BOOST_CHECK_THROW(
-        lexical_cast<char>(std::string("")), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(
-        lexical_cast<char>(std::string("Test")), boost::bad_lexical_cast);
-}
-
-void test_conversion_to_int()
-{
-    BOOST_CHECK_EQUAL(1,lexical_cast<int>('1'));
-    BOOST_CHECK_EQUAL(0,lexical_cast<int>('0'));
-    BOOST_CHECK_THROW(lexical_cast<int>('A'),boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL(1,lexical_cast<int>(1));
-    BOOST_CHECK_EQUAL(
-        std::numeric_limits<int>::max(),
-        lexical_cast<int>(std::numeric_limits<int>::max()));
-    BOOST_CHECK_EQUAL(1,lexical_cast<int>(1.0));
-
-    BOOST_CHECK_THROW(lexical_cast<int>(1.23), boost::bad_lexical_cast);
-
-    BOOST_CHECK_THROW(lexical_cast<int>(1e20), boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL(1, lexical_cast<int>(true));
-    BOOST_CHECK_EQUAL(0, lexical_cast<int>(false));
-    BOOST_CHECK_EQUAL(123, lexical_cast<int>("123"));
-    BOOST_CHECK_THROW(
-        lexical_cast<int>(" 123"), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<int>(""), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<int>("Test"), boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL(123, lexical_cast<int>("123"));
-    BOOST_CHECK_EQUAL(123,lexical_cast<int>(std::string("123")));
-    BOOST_CHECK_THROW(
-        lexical_cast<int>(std::string(" 123")), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(
-        lexical_cast<int>(std::string("")), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(
-        lexical_cast<int>(std::string("Test")), boost::bad_lexical_cast);
-}
-
-void test_conversion_to_double()
-{
-    BOOST_CHECK_EQUAL(1.0, lexical_cast<double>('1'));
-    BOOST_CHECK_THROW(lexical_cast<double>('A'), boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL(1.0, lexical_cast<double>(1));
-    BOOST_CHECK_EQUAL(1.23, lexical_cast<double>(1.23));
-    BOOST_CHECK_CLOSE(
-        std::numeric_limits<double>::max() / 2,
-        lexical_cast<double>(std::numeric_limits<double>::max() / 2),
-        std::numeric_limits<double>::epsilon());
-    BOOST_CHECK_EQUAL(1.0, lexical_cast<double>(true));
-    BOOST_CHECK_EQUAL(0.0, lexical_cast<double>(false));
-    BOOST_CHECK_EQUAL(1.23, lexical_cast<double>("1.23"));
-    BOOST_CHECK_THROW(lexical_cast<double>(""), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<double>("Test"), boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL(1.23, lexical_cast<double>(std::string("1.23")));
-    BOOST_CHECK_THROW(
-        lexical_cast<double>(std::string("")), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(
-        lexical_cast<double>(std::string("Test")), boost::bad_lexical_cast);
-}
-
-void test_conversion_to_bool()
-{
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>('1'));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>('0'));
-    BOOST_CHECK_THROW(lexical_cast<bool>('A'), boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(1));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(0));
-    BOOST_CHECK_THROW(lexical_cast<bool>(123), boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(1.0));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(0.0));
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(true));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(false));
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>("1"));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>("0"));
-    BOOST_CHECK_THROW(lexical_cast<bool>(""), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>("Test"), boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>("1"));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>("0"));
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(std::string("1")));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(std::string("0")));
-    BOOST_CHECK_THROW(
-        lexical_cast<bool>(std::string("")), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(
-        lexical_cast<bool>(std::string("Test")), boost::bad_lexical_cast);
-}
-
-void test_conversion_to_string()
-{
-    BOOST_CHECK_EQUAL("A", lexical_cast<std::string>('A'));
-    BOOST_CHECK_EQUAL(" ", lexical_cast<std::string>(' '));
-    BOOST_CHECK_EQUAL("123", lexical_cast<std::string>(123));
-    BOOST_CHECK_EQUAL("1.23", lexical_cast<std::string>(1.23));
-    BOOST_CHECK_EQUAL("1.111111111", lexical_cast<std::string>(1.111111111));
-    BOOST_CHECK_EQUAL("1",lexical_cast<std::string>(true));
-    BOOST_CHECK_EQUAL("0",lexical_cast<std::string>(false));
-    BOOST_CHECK_EQUAL("Test", lexical_cast<std::string>("Test"));
-    BOOST_CHECK_EQUAL(" ", lexical_cast<std::string>(" "));
-    BOOST_CHECK_EQUAL("", lexical_cast<std::string>(""));
-    BOOST_CHECK_EQUAL("Test", lexical_cast<std::string>(std::string("Test")));
-    BOOST_CHECK_EQUAL(" ", lexical_cast<std::string>(std::string(" ")));
-    BOOST_CHECK_EQUAL("", lexical_cast<std::string>(std::string("")));
-}
-
-void test_conversion_to_pointer()
-{
-    BOOST_CHECK_THROW(lexical_cast<char *>("Test"), boost::bad_lexical_cast);
-    #ifndef DISABLE_WIDE_CHAR_SUPPORT
-    BOOST_CHECK_THROW(lexical_cast<wchar_t *>("Test"), boost::bad_lexical_cast);
-    #endif
-}
-
-void test_conversion_from_wchar_t()
-{
-    #ifndef DISABLE_WIDE_CHAR_SUPPORT
-    BOOST_CHECK_EQUAL(1, lexical_cast<int>(L'1'));
-    BOOST_CHECK_THROW(lexical_cast<int>(L'A'), boost::bad_lexical_cast);
-
-    BOOST_CHECK_EQUAL(123, lexical_cast<int>(L"123"));
-    BOOST_CHECK_THROW(lexical_cast<int>(L""), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<int>(L"Test"), boost::bad_lexical_cast);
-
-    BOOST_CHECK_EQUAL(1.0, lexical_cast<double>(L'1'));
-    BOOST_CHECK_THROW(lexical_cast<double>(L'A'), boost::bad_lexical_cast);
-
-    BOOST_CHECK_EQUAL(1.23, lexical_cast<double>(L"1.23"));
-    BOOST_CHECK_THROW(lexical_cast<double>(L""), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<double>(L"Test"), boost::bad_lexical_cast);
-
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(L'1'));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(L'0'));
-    BOOST_CHECK_THROW(lexical_cast<bool>(L'A'), boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(L"1"));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(L"0"));
-    BOOST_CHECK_THROW(lexical_cast<bool>(L""), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<bool>(L"Test"), boost::bad_lexical_cast);
-    #endif
-}
-
-void test_conversion_to_wchar_t()
-{
-    #ifndef DISABLE_WIDE_CHAR_SUPPORT
-    BOOST_CHECK_EQUAL(L'1', lexical_cast<wchar_t>(1));
-    BOOST_CHECK_EQUAL(L'0', lexical_cast<wchar_t>(0));
-    BOOST_CHECK_THROW(lexical_cast<wchar_t>(123), boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL(L'1', lexical_cast<wchar_t>(1.0));
-    BOOST_CHECK_EQUAL(L'0', lexical_cast<wchar_t>(0.0));
-    BOOST_CHECK_EQUAL(L'1', lexical_cast<wchar_t>(true));
-    BOOST_CHECK_EQUAL(L'0', lexical_cast<wchar_t>(false));
-    BOOST_CHECK_EQUAL(L'A', lexical_cast<wchar_t>(L'A'));
-    BOOST_CHECK_EQUAL(L' ', lexical_cast<wchar_t>(L' '));
-    BOOST_CHECK_EQUAL(L'A', lexical_cast<wchar_t>(L"A"));
-    BOOST_CHECK_EQUAL(L' ', lexical_cast<wchar_t>(L" "));
-    BOOST_CHECK_THROW(lexical_cast<wchar_t>(L""), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(lexical_cast<wchar_t>(L"Test"), boost::bad_lexical_cast);
-    BOOST_CHECK_EQUAL(L'A', lexical_cast<wchar_t>(std::wstring(L"A")));
-    BOOST_CHECK_EQUAL(L' ', lexical_cast<wchar_t>(std::wstring(L" ")));
-    BOOST_CHECK_THROW(
-        lexical_cast<wchar_t>(std::wstring(L"")), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(
-        lexical_cast<wchar_t>(std::wstring(L"Test")), boost::bad_lexical_cast);
-    #endif
-}
-
-void test_conversion_from_wstring()
-{
-    #ifndef DISABLE_WIDE_CHAR_SUPPORT
-    BOOST_CHECK_EQUAL(123, lexical_cast<int>(std::wstring(L"123")));
-    BOOST_CHECK_THROW(
-        lexical_cast<int>(std::wstring(L"")), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(
-        lexical_cast<int>(std::wstring(L"Test")), boost::bad_lexical_cast);
-
-    BOOST_CHECK_EQUAL(true, lexical_cast<bool>(std::wstring(L"1")));
-    BOOST_CHECK_EQUAL(false, lexical_cast<bool>(std::wstring(L"0")));
-    BOOST_CHECK_THROW(
-        lexical_cast<bool>(std::wstring(L"")), boost::bad_lexical_cast);
-    BOOST_CHECK_THROW(
-        lexical_cast<bool>(std::wstring(L"Test")), boost::bad_lexical_cast);
-    #endif
-}
-
-void test_conversion_to_wstring()
-{
-    #ifndef DISABLE_WIDE_CHAR_SUPPORT
-    BOOST_CHECK(L"123" == lexical_cast<std::wstring>(123));
-    BOOST_CHECK(L"1.23" == lexical_cast<std::wstring>(1.23));
-    BOOST_CHECK(L"1.111111111" == lexical_cast<std::wstring>(1.111111111));
-    BOOST_CHECK(L"1" == lexical_cast<std::wstring>(true));
-    BOOST_CHECK(L"0" == lexical_cast<std::wstring>(false));
-    BOOST_CHECK(L"A" == lexical_cast<std::wstring>(L'A'));
-    BOOST_CHECK(L" " == lexical_cast<std::wstring>(L' '));
-    BOOST_CHECK(L"Test" == lexical_cast<std::wstring>(L"Test"));
-    BOOST_CHECK(L" " == lexical_cast<std::wstring>(L" "));
-    BOOST_CHECK(L"" == lexical_cast<std::wstring>(L""));
-    BOOST_CHECK(L"Test" == lexical_cast<std::wstring>(std::wstring(L"Test")));
-    BOOST_CHECK(L" " == lexical_cast<std::wstring>(std::wstring(L" ")));
-    BOOST_CHECK(L"" == lexical_cast<std::wstring>(std::wstring(L"")));
-    #endif
-}

meta/libraries.json

@@ -0,0 +1,16 @@
+{
+    "key": "conversion",
+    "name": "Conversion",
+    "authors": [
+        "Dave Abrahams",
+        "Kevlin Henney"
+    ],
+    "description": "Polymorphic casts.",
+    "category": [
+        "Miscellaneous"
+    ],
+    "maintainers": [
+        "Antony Polukhin <antoshkka -at- gmail.com>"
+    ],
+    "cxxstd": "11"
+}

test.hpp

@@ -1,312 +0,0 @@
-// 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.

test/CMakeLists.txt

@@ -0,0 +1,17 @@
+# 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)

test/Jamfile.v2

@@ -0,0 +1,31 @@
+# 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 ]
+  ;

test/appveyor.yml

@@ -0,0 +1,87 @@
+# 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:

test/cast_test.cpp

@@ -0,0 +1,124 @@
+//  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

test/implicit_cast.cpp

@@ -0,0 +1,43 @@
+// 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();
+}

test/implicit_cast_fail.cpp

@@ -0,0 +1,20 @@
+// 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;
+}

test/implicit_cast_fail2.cpp

@@ -0,0 +1,19 @@
+//
+// 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;
+}

test/polymorphic_cast_test.cpp

@@ -0,0 +1,383 @@
+//
+// 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();
+}