Simplify and generalize hash_integral_impl

Doc fixes

.appveyor.yml

@@ -0,0 +1,72 @@
+# Copyright 2017 Daniel James
+# Copyright 2016-2021 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
+
+version: 1.0.{build}-{branch}
+
+shallow_clone: true
+
+branches:
+  only:
+    - master
+    - develop
+    - /feature\/.*/
+
+environment:
+  matrix:
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-9.0,msvc-10.0,msvc-11.0
+      ADDRMD: 32
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-12.0,msvc-14.0
+      ADDRMD: 32,64
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: msvc-14.1
+      CXXSTD: 14,17
+      ADDRMD: 32,64
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+      TOOLSET: msvc-14.2
+      CXXSTD: 14,17,latest
+      ADDRMD: 32,64
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+      TOOLSET: clang-win
+      CXXSTD: 14,17,latest
+      ADDRMD: 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_64-6.3.0-posix-seh-rt_v5-rev1\mingw64\bin;
+      TOOLSET: gcc
+      CXXSTD: 03,11,14,1z
+
+install:
+  - set BOOST_BRANCH=develop
+  - if "%APPVEYOR_REPO_BRANCH%" == "master" set BOOST_BRANCH=master
+  - cd ..
+  - git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
+  - cd boost-root
+  - git submodule update --init tools/boostdep
+  - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\container_hash\
+  - python tools/boostdep/depinst/depinst.py -I examples container_hash
+  - cmd /c bootstrap
+  - b2 -d0 headers
+
+build: off
+
+test_script:
+  - PATH=%ADDPATH%%PATH%
+  - if not "%CXXSTD%" == "" set CXXSTD=cxxstd=%CXXSTD%
+  - if not "%ADDRMD%" == "" set ADDRMD=address-model=%ADDRMD%
+  - b2 -j3 --verbose-test libs/container_hash/test//hash_info toolset=%TOOLSET% %CXXSTD% %ADDRMD% variant=debug,release embed-manifest-via=linker
+  - b2 -j3 libs/container_hash/test toolset=%TOOLSET% %CXXSTD% %ADDRMD% variant=debug,release embed-manifest-via=linker

.github/workflows/ci.yml

@@ -0,0 +1,386 @@
+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-4.8
+            cxxstd: "03,11"
+            os: ubuntu-18.04
+            install: g++-4.8-multilib
+            address-model: 32,64
+          - toolset: gcc-5
+            cxxstd: "03,11,14,1z"
+            os: ubuntu-18.04
+            install: g++-5-multilib
+            address-model: 32,64
+          - toolset: gcc-6
+            cxxstd: "03,11,14,1z"
+            os: ubuntu-18.04
+            install: g++-6-multilib
+            address-model: 32,64
+          - toolset: gcc-7
+            cxxstd: "03,11,14,17"
+            os: ubuntu-18.04
+            install: g++-7-multilib
+            address-model: 32,64
+          - toolset: gcc-8
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-18.04
+            install: g++-8-multilib
+            address-model: 32,64
+          - toolset: gcc-9
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-20.04
+            install: g++-9-multilib
+            address-model: 32,64
+          - toolset: gcc-10
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-20.04
+            install: g++-10-multilib
+            address-model: 32,64
+          - toolset: gcc-11
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-20.04
+            install: g++-11-multilib
+            address-model: 32,64
+          - toolset: gcc-12
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-22.04
+            install: g++-12-multilib
+            address-model: 32,64
+          - toolset: clang
+            compiler: clang++-3.9
+            cxxstd: "03,11,14"
+            os: ubuntu-18.04
+            install: clang-3.9
+          - toolset: clang
+            compiler: clang++-4.0
+            cxxstd: "03,11,14"
+            os: ubuntu-18.04
+            install: clang-4.0
+          - toolset: clang
+            compiler: clang++-5.0
+            cxxstd: "03,11,14,1z"
+            os: ubuntu-18.04
+            install: clang-5.0
+          - toolset: clang
+            compiler: clang++-6.0
+            cxxstd: "03,11,14,17"
+            os: ubuntu-18.04
+            install: clang-6.0
+          - toolset: clang
+            compiler: clang++-7
+            cxxstd: "03,11,14,17"
+            os: ubuntu-18.04
+            install: clang-7
+          - toolset: clang
+            compiler: clang++-8
+            cxxstd: "03,11,14,17"
+            os: ubuntu-20.04
+            install: clang-8
+          - toolset: clang
+            compiler: clang++-9
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-20.04
+            install: clang-9
+          - toolset: clang
+            compiler: clang++-10
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-20.04
+          - toolset: clang
+            compiler: clang++-11
+            cxxstd: "03,11,14,17,2a"
+            os: ubuntu-20.04
+          - toolset: clang
+            compiler: clang++-12
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-20.04
+          - toolset: clang
+            compiler: clang++-13
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-22.04
+            install: clang-13
+          - toolset: clang
+            compiler: clang++-14
+            cxxstd: "03,11,14,17,20"
+            os: ubuntu-22.04
+            install: clang-14
+          - toolset: clang
+            cxxstd: "03,11,14,17,2a"
+            os: macos-10.15
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - 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 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py -I examples --git_args "--jobs 3" $LIBRARY
+          ./bootstrap.sh
+          ./b2 -d0 headers
+
+      - name: Create user-config.jam
+        if: matrix.compiler
+        run: |
+          echo "using ${{matrix.toolset}} : : ${{matrix.compiler}} ;" > ~/user-config.jam
+
+      - name: Run tests
+        run: |
+          cd ../boost-root
+          export ADDRMD=${{matrix.address-model}}
+          ./b2 -j3 --verbose-test libs/$LIBRARY/test//hash_info toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} ${ADDRMD:+address-model=$ADDRMD} variant=debug,release
+          ./b2 -j3 libs/$LIBRARY/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} ${ADDRMD:+address-model=$ADDRMD} variant=debug,release
+
+  windows:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - toolset: msvc-14.0
+            cxxstd: 14,latest
+            addrmd: 32,64
+            os: windows-2019
+          - toolset: msvc-14.2
+            cxxstd: "14,17,20,latest"
+            addrmd: 32,64
+            os: windows-2019
+          - toolset: msvc-14.3
+            cxxstd: "14,17,20,latest"
+            addrmd: 32,64
+            os: windows-2022
+          - toolset: clang-win
+            cxxstd: "14,17,latest"
+            addrmd: 32,64
+            os: windows-2022
+          - toolset: gcc
+            cxxstd: "03,11,14,17,2a"
+            addrmd: 64
+            os: windows-2019
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Boost
+        shell: cmd
+        run: |
+          echo GITHUB_REPOSITORY: %GITHUB_REPOSITORY%
+          for /f %%i in ("%GITHUB_REPOSITORY%") do set LIBRARY=%%~nxi
+          echo LIBRARY: %LIBRARY%
+          echo LIBRARY=%LIBRARY%>>%GITHUB_ENV%
+          echo GITHUB_BASE_REF: %GITHUB_BASE_REF%
+          echo GITHUB_REF: %GITHUB_REF%
+          if "%GITHUB_BASE_REF%" == "" set GITHUB_BASE_REF=%GITHUB_REF%
+          set BOOST_BRANCH=develop
+          for /f %%i in ("%GITHUB_BASE_REF%") do if "%%~nxi" == "master" set BOOST_BRANCH=master
+          echo BOOST_BRANCH: %BOOST_BRANCH%
+          cd ..
+          git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          xcopy /s /e /q %GITHUB_WORKSPACE% libs\%LIBRARY%\
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py -I examples --git_args "--jobs 3" %LIBRARY%
+          cmd /c bootstrap
+          b2 -d0 headers
+
+      - name: Run tests
+        shell: cmd
+        run: |
+          cd ../boost-root
+          b2 -j3 --verbose-test libs/%LIBRARY%/test//hash_info toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} address-model=${{matrix.addrmd}} variant=debug,release embed-manifest-via=linker
+          b2 -j3 libs/%LIBRARY%/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} address-model=${{matrix.addrmd}} variant=debug,release embed-manifest-via=linker
+
+  posix-cmake-subdir:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-18.04
+          - os: ubuntu-20.04
+          - os: ubuntu-22.04
+          - os: macos-10.15
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - 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 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" $LIBRARY
+
+      - name: Use library with add_subdirectory
+        run: |
+          cd ../boost-root/libs/$LIBRARY/test/cmake_subdir_test
+          mkdir __build__ && cd __build__
+          cmake ..
+          cmake --build .
+          ctest --output-on-failure --no-tests=error
+
+  posix-cmake-install:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-18.04
+          - os: ubuntu-20.04
+          - os: ubuntu-22.04
+          - os: macos-10.15
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - 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 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" $LIBRARY
+
+      - name: Configure
+        run: |
+          cd ../boost-root
+          mkdir __build__ && cd __build__
+          cmake -DBOOST_INCLUDE_LIBRARIES=$LIBRARY -DCMAKE_INSTALL_PREFIX=~/.local ..
+
+      - name: Install
+        run: |
+          cd ../boost-root/__build__
+          cmake --build . --target install
+
+      - name: Use the installed library
+        run: |
+          cd ../boost-root/libs/$LIBRARY/test/cmake_install_test && mkdir __build__ && cd __build__
+          cmake -DCMAKE_INSTALL_PREFIX=~/.local ..
+          cmake --build .
+          ctest --output-on-failure --no-tests=error
+
+  posix-cmake-test:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-18.04
+          - os: ubuntu-20.04
+          - os: ubuntu-22.04
+          - os: macos-10.15
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - 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 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" $LIBRARY
+
+      - name: Configure
+        run: |
+          cd ../boost-root
+          mkdir __build__ && cd __build__
+          cmake -DBOOST_INCLUDE_LIBRARIES=$LIBRARY -DBUILD_TESTING=ON ..
+
+      - name: Build tests
+        run: |
+          cd ../boost-root/__build__
+          cmake --build . --target tests
+
+      - name: Run tests
+        run: |
+          cd ../boost-root/__build__
+          ctest --output-on-failure --no-tests=error

.travis.yml

@@ -0,0 +1,78 @@
+# Copyright (C) 2016 Daniel James.
+# 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)
+
+# Use Trusty to get a reasonably recent version of Boost.
+sudo: required
+dist: trusty
+
+language: c++
+
+matrix:
+    include:
+      - compiler: gcc
+        env: |
+            USER_CONFIG="using gcc : : g++-4.8 ;"
+            CXXSTD=03,11
+      - compiler: g++-7
+        env: |
+            USER_CONFIG="using gcc : : g++-7 ;"
+            CXXSTD=11,14,17
+        addons:
+          apt:
+            packages:
+              - g++-7
+            sources:
+              - ubuntu-toolchain-r-test
+      - compiler: clang
+        env: |
+            USER_CONFIG="using clang : : clang++ ;"
+            CXXSTD=03,11
+      - compiler: clang
+        env: |
+            USER_CONFIG="using clang : : clang++ -D_HAS_AUTO_PTR_ETC=0 ;"
+            CXXSTD=11
+
+before_script:
+    - export BOOST_VERSION=1.67.0
+    - export BOOST_FILENAME=boost_1_67_0
+    - export BOOST_ROOT=${HOME}/boost
+    - cd ${TRAVIS_BUILD_DIR}
+    - touch Jamroot.jam
+    - cd $HOME
+    - echo $USER_CONFIG > ~/user-config.jam
+    - cat ~/user-config.jam
+    - |
+        mkdir $HOME/download
+        mkdir $HOME/extract
+        cd $HOME/download
+        if [ "$TRAVIS_EVENT_TYPE" == "cron" ]
+        then
+            if [ "$TRAVIS_BRANCH" == "master" ]
+            then
+                snapshot_branch=master
+            else
+                snapshot_branch=develop
+            fi
+            download_url=$(curl https://api.bintray.com/packages/boostorg/$snapshot_branch/snapshot/files |
+                    python -c "import os.path, sys, json; x = json.load(sys.stdin); print '\n'.join(a['path'] for a in x if os.path.splitext(a['path'])[1] == '.bz2')" |
+                    head -n 1 |
+                    sed "s/^/http:\/\/dl.bintray.com\/boostorg\/$snapshot_branch\//")
+        else
+            download_url=https://sourceforge.net/projects/boost/files/boost/${BOOST_VERSION}/${BOOST_FILENAME}.tar.bz2/download
+        fi
+        echo "Downloading ${download_url}"
+        wget -O boost.tar.bz2 $download_url
+        cd $HOME/extract
+        tar -xjf $HOME/download/boost.tar.bz2
+        mv * ${BOOST_ROOT}
+    - rm -r ${BOOST_ROOT}/boost/functional
+    - cd ${BOOST_ROOT}/tools/build
+    - mkdir ${HOME}/opt
+    - ./bootstrap.sh
+    - ./b2 install --prefix=$HOME/opt
+
+script:
+    - cd ${TRAVIS_BUILD_DIR}/test
+    - ${HOME}/opt/bin/b2 --verbose-test -j 3 cxxstd=$CXXSTD -q ${BJAM_TOOLSET} include=${BOOST_ROOT} include=${TRAVIS_BUILD_DIR}/include hash_info
+    - ${HOME}/opt/bin/b2 -j 3 cxxstd=$CXXSTD -q ${BJAM_TOOLSET} include=${BOOST_ROOT} include=${TRAVIS_BUILD_DIR}/include

CMakeLists.txt

@@ -0,0 +1,25 @@
+# Generated by `boostdep --cmake container_hash`
+# Copyright 2020, 2021 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# https://www.boost.org/LICENSE_1_0.txt
+
+cmake_minimum_required(VERSION 3.5...3.20)
+
+project(boost_container_hash VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX)
+
+add_library(boost_container_hash INTERFACE)
+add_library(Boost::container_hash ALIAS boost_container_hash)
+
+target_include_directories(boost_container_hash INTERFACE include)
+
+target_link_libraries(boost_container_hash
+  INTERFACE
+    Boost::config
+    Boost::type_traits
+)
+
+if(BUILD_TESTING AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/test/CMakeLists.txt")
+
+  add_subdirectory(test)
+
+endif()

benchmark/char_seq.cpp

@@ -0,0 +1,101 @@
+// Copyright 2022 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#define _CRT_SECURE_NO_WARNINGS
+
+#include <boost/container_hash/hash.hpp>
+#include <boost/core/detail/splitmix64.hpp>
+#include <boost/core/type_name.hpp>
+#include <boost/config.hpp>
+#include <cstddef>
+#include <cstdio>
+#include <cstdint>
+#include <string>
+#include <vector>
+#include <deque>
+#include <list>
+#include <chrono>
+
+// test_hash_speed
+
+template<class T, class V> void test_hash_speed( int N, V const& v )
+{
+    std::vector<T> w;
+
+    w.reserve( N );
+
+    for( int i = 0; i < N; ++i )
+    {
+        w.emplace_back( v[i].begin(), v[i].end() );
+    }
+
+    typedef std::chrono::steady_clock clock_type;
+
+    clock_type::time_point t1 = clock_type::now();
+
+    std::size_t q = 0;
+
+    boost::hash<T> const h;
+
+    for( int i = 0; i < N; ++i )
+    {
+        q += h( w[i] );
+    }
+
+    clock_type::time_point t2 = clock_type::now();
+
+    long long ms1 = std::chrono::duration_cast<std::chrono::milliseconds>( t2 - t1 ).count();
+
+    std::string type = boost::core::type_name<T>();
+
+#if defined( _MSC_VER )
+
+    std::printf( "%25s : q=%20Iu, %lld ms\n", type.c_str(), q, ms1 );
+
+#else
+
+    std::printf( "%25s : q=%20zu, %lld ms\n", type.c_str(), q, ms1 );
+
+#endif
+}
+
+int main()
+{
+    int const N = 1048576 * 8;
+
+    std::vector<std::string> v;
+
+    {
+        v.reserve( N );
+
+        boost::detail::splitmix64 rnd;
+
+        for( int i = 0; i < N; ++i )
+        {
+            char buffer[ 64 ];
+
+            unsigned long long k = rnd();
+
+            if( k & 1 )
+            {
+                sprintf( buffer, "prefix_%llu_suffix", k );
+            }
+            else
+            {
+                sprintf( buffer, "{%u}", static_cast<unsigned>( k ) );
+            }
+
+            v.push_back( buffer );
+        }
+    }
+
+    std::puts( "Char sequence hashing test:\n" );
+
+    test_hash_speed< std::string >( N, v );
+    test_hash_speed< std::vector<char> >( N, v );
+    test_hash_speed< std::deque<char> >( N, v );
+    test_hash_speed< std::list<char> >( N, v );
+
+    std::puts( "" );
+}

benchmark/unordered.cpp

@@ -0,0 +1,389 @@
+// Copyright 2022 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#define _CRT_SECURE_NO_WARNINGS
+
+#include <boost/container_hash/hash.hpp>
+#include <boost/unordered_set.hpp>
+#include <boost/core/detail/splitmix64.hpp>
+#include <boost/core/type_name.hpp>
+#include <boost/config.hpp>
+#include <cstddef>
+#include <cstdio>
+#include <cstdint>
+#include <string>
+#include <vector>
+#include <chrono>
+#include <functional>
+
+// mul31_hash
+
+class mul31_hash
+{
+public:
+
+    std::size_t operator()( std::string const& st ) const BOOST_NOEXCEPT
+    {
+        char const * p = st.data();
+        std::size_t n = st.size();
+
+#if SIZE_MAX > UINT32_MAX
+        std::size_t h = 0xCBF29CE484222325ull;
+#else
+        std::size_t h = 0x811C9DC5u;
+#endif
+
+        for( std::size_t i = 0; i < n; ++i )
+        {
+            h = h * 31 + static_cast<unsigned char>( p[i] );
+        }
+
+        return h;
+    }
+};
+
+// mul31_unrolled_hash
+
+template<int Bits> struct mul31_unrolled_hash_impl;
+
+template<> struct mul31_unrolled_hash_impl<32>
+{
+    std::size_t operator()( std::string const& st ) const BOOST_NOEXCEPT
+    {
+        char const * p = st.data();
+        std::size_t n = st.size();
+
+        std::size_t h = 0x811C9DC5u;
+
+        while( n >= 4 )
+        {
+            h = h * (31u * 31u * 31u * 31u)
+                + static_cast<unsigned char>( p[0] ) * (31u * 31u * 31u)
+                + static_cast<unsigned char>( p[1] ) * (31u * 31u)
+                + static_cast<unsigned char>( p[2] ) * 31u
+                + static_cast<unsigned char>( p[3] );
+
+            p += 4;
+            n -= 4;
+        }
+
+        while( n > 0 )
+        {
+            h = h * 31u + static_cast<unsigned char>( *p );
+
+            ++p;
+            --n;
+        }
+
+        return h;
+    }
+};
+
+template<> struct mul31_unrolled_hash_impl<64>
+{
+    std::size_t operator()( std::string const& st ) const BOOST_NOEXCEPT
+    {
+        char const * p = st.data();
+        std::size_t n = st.size();
+
+        std::size_t h = 0xCBF29CE484222325ull;
+
+        while( n >= 8 )
+        {
+            h = h * (31ull * 31ull * 31ull * 31ull * 31ull * 31ull * 31ull * 31ull)
+                + static_cast<unsigned char>( p[0] ) * (31ull * 31ull * 31ull * 31ull * 31ull * 31ull * 31ull)
+                + static_cast<unsigned char>( p[1] ) * (31ull * 31ull * 31ull * 31ull * 31ull * 31ull)
+                + static_cast<unsigned char>( p[2] ) * (31ull * 31ull * 31ull * 31ull * 31ull)
+                + static_cast<unsigned char>( p[3] ) * (31ull * 31ull * 31ull * 31ull)
+                + static_cast<unsigned char>( p[4] ) * (31ull * 31ull * 31ull)
+                + static_cast<unsigned char>( p[5] ) * (31ull * 31ull)
+                + static_cast<unsigned char>( p[6] ) * 31ull
+                + static_cast<unsigned char>( p[7] );
+
+            p += 8;
+            n -= 8;
+        }
+
+        while( n > 0 )
+        {
+            h = h * 31u + static_cast<unsigned char>( *p );
+
+            ++p;
+            --n;
+        }
+
+        return h;
+    }
+};
+
+struct mul31_unrolled_hash: mul31_unrolled_hash_impl< std::numeric_limits<std::size_t>::digits > {};
+
+// fnv1a_hash
+
+template<int Bits> struct fnv1a_hash_impl;
+
+template<> struct fnv1a_hash_impl<32>
+{
+    std::size_t operator()( std::string const& s ) const
+    {
+        std::size_t h = 0x811C9DC5u;
+
+        char const * first = s.data();
+        char const * last = first + s.size();
+
+        for( ; first != last; ++first )
+        {
+            h ^= static_cast<unsigned char>( *first );
+            h *= 0x01000193ul;
+        }
+
+        return h;
+    }
+};
+
+template<> struct fnv1a_hash_impl<64>
+{
+    std::size_t operator()( std::string const& s ) const
+    {
+        std::size_t h = 0xCBF29CE484222325ull;
+
+        char const * first = s.data();
+        char const * last = first + s.size();
+
+        for( ; first != last; ++first )
+        {
+            h ^= static_cast<unsigned char>( *first );
+            h *= 0x00000100000001B3ull;
+        }
+
+        return h;
+    }
+};
+
+struct fnv1a_hash: fnv1a_hash_impl< std::numeric_limits<std::size_t>::digits > {};
+
+// old_boost_hash
+
+class old_boost_hash
+{
+public:
+
+    std::size_t operator()( std::string const& st ) const BOOST_NOEXCEPT
+    {
+        char const * p = st.data();
+        std::size_t n = st.size();
+
+        std::size_t h = 0;
+
+        for( std::size_t i = 0; i < n; ++i )
+        {
+            h ^= static_cast<unsigned char>( p[i] ) + 0x9e3779b9 + ( h << 6 ) + ( h >> 2 );
+        }
+
+        return h;
+    }
+};
+
+// test_hash_speed
+
+template<class H, class V> void test_hash_speed( int N, V const& v )
+{
+    typedef std::chrono::steady_clock clock_type;
+
+    clock_type::time_point t1 = clock_type::now();
+
+    std::size_t q = 0;
+
+    H const h;
+
+    for( int i = 0; i < N; ++i )
+    {
+        q += h( v[i] );
+    }
+
+    clock_type::time_point t2 = clock_type::now();
+
+    long long ms1 = std::chrono::duration_cast<std::chrono::milliseconds>( t2 - t1 ).count();
+
+    std::string hash = boost::core::type_name<H>();
+
+#if defined( _MSC_VER )
+
+    std::printf( "%25s : q=%20Iu, %lld ms\n", hash.c_str(), q, ms1 );
+
+#else
+
+    std::printf( "%25s : q=%20zu, %lld ms\n", hash.c_str(), q, ms1 );
+
+#endif
+}
+
+// test_hash_collision
+
+template<class H, class V> void test_hash_collision( int N, V const& v, std::size_t n )
+{
+    boost::unordered_set<std::size_t> s;
+    H const h;
+
+    for( int i = 0; i < N; ++i )
+    {
+        s.insert( h( v[i] ) );
+    }
+
+    std::string hash = boost::core::type_name<H>();
+
+#if defined( _MSC_VER )
+
+    std::printf( "%25s : c=%Iu\n", hash.c_str(), n - s.size() );
+
+#else
+
+    std::printf( "%25s : c=%zu\n", hash.c_str(), n - s.size() );
+
+#endif
+}
+
+// test_container_speed
+
+template<class V, class S> void test4( int N, V const& v, char const * hash, S s )
+{
+    typedef std::chrono::steady_clock clock_type;
+
+    clock_type::time_point t1 = clock_type::now();
+
+    for( int i = 0; i < N; ++i )
+    {
+        s.insert( v[ i * 16 ] );
+    }
+
+    clock_type::time_point t2 = clock_type::now();
+
+    std::size_t q = 0;
+
+    for( int i = 0; i < 16 * N; ++i )
+    {
+        q += s.count( v[ i ] );
+    }
+
+    clock_type::time_point t3 = clock_type::now();
+
+    long long ms1 = std::chrono::duration_cast<std::chrono::milliseconds>( t2 - t1 ).count();
+    long long ms2 = std::chrono::duration_cast<std::chrono::milliseconds>( t3 - t2 ).count();
+
+    std::size_t n = s.bucket_count();
+    std::size_t m = 0;
+    std::size_t c = 0;
+
+    for( std::size_t i = 0; i < n; ++i )
+    {
+        std::size_t k = s.bucket_size( i );
+
+        if( k > 1 )
+        {
+            c += k - 1;
+        }
+
+        if( k > m )
+        {
+            m = k;
+        }
+    }
+
+#if defined( _MSC_VER )
+
+    std::printf( "%25s : n=%Iu, m=%Iu, c=%Iu, q=%Iu, %lld + %lld ms\n", hash, n, m, c, q, ms1, ms2 );
+
+#else
+
+    std::printf( "%25s : n=%zu, m=%zu, c=%zu, q=%zu, %lld + %lld ms\n", hash, n, m, c, q, ms1, ms2 );
+
+#endif
+}
+
+template<class K, class H, class V> void test_container_speed( int N, V const& v )
+{
+    boost::unordered_set<K, H> s( 0 );
+    test4( N, v, boost::core::type_name<H>().c_str(), s );
+}
+
+int main()
+{
+    int const N = 1048576 / 2; // 1048576 is too much for 32 bit
+
+    std::vector<std::string> v;
+
+    {
+        v.reserve( N * 16 );
+
+        boost::detail::splitmix64 rnd;
+
+        for( int i = 0; i < 16 * N; ++i )
+        {
+            char buffer[ 64 ];
+
+            unsigned long long k = rnd();
+
+            if( k & 1 )
+            {
+                sprintf( buffer, "prefix_%llu_suffix", k );
+            }
+            else
+            {
+                sprintf( buffer, "{%u}", static_cast<unsigned>( k ) );
+            }
+
+            v.push_back( buffer );
+        }
+    }
+
+    std::puts( "Hash speed test:\n" );
+
+    test_hash_speed<mul31_hash>( N * 16, v );
+    test_hash_speed<mul31_unrolled_hash>( N * 16, v );
+    test_hash_speed<fnv1a_hash>( N * 16, v );
+    test_hash_speed<old_boost_hash>( N * 16, v );
+    test_hash_speed<boost::hash<std::string> >( N * 16, v );
+    test_hash_speed<std::hash<std::string> >( N * 16, v );
+
+    std::puts( "" );
+
+    std::puts( "Hash collision test:\n" );
+
+    {
+        std::size_t n = 0;
+
+        {
+            boost::unordered_set<std::string> s;
+
+            for( int i = 0; i < N * 16; ++i )
+            {
+                s.insert( v[i] );
+            }
+
+            n = s.size();
+        }
+
+        test_hash_collision<mul31_hash>( N * 16, v, n );
+        test_hash_collision<mul31_unrolled_hash>( N * 16, v, n );
+        test_hash_collision<fnv1a_hash>( N * 16, v, n );
+        test_hash_collision<old_boost_hash>( N * 16, v, n );
+        test_hash_collision<boost::hash<std::string> >( N * 16, v, n );
+        test_hash_collision<std::hash<std::string> >( N * 16, v, n );
+    }
+
+    std::puts( "" );
+
+    typedef std::string K;
+
+    std::puts( "Container speed test:\n" );
+
+    test_container_speed<K, mul31_hash>( N, v );
+    test_container_speed<K, mul31_unrolled_hash>( N, v );
+    test_container_speed<K, fnv1a_hash>( N, v );
+    test_container_speed<K, old_boost_hash>( N, v );
+    test_container_speed<K, boost::hash<std::string> >( N, v );
+    test_container_speed<K, std::hash<std::string> >( N, v );
+
+    std::puts( "" );
+}

doc/.gitignore

@@ -0,0 +1,2 @@
+/html/
+/pdf/

doc/Jamfile.v2

@@ -3,14 +3,20 @@
 # 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)
 
-xml hash : hash.qbk ;
-boostbook standalone : hash :
-    <xsl:param>boost.root=../../../..
+import asciidoctor ;
 
-    <xsl:param>chunk.first.sections=1
-    <xsl:param>chunk.section.depth=2
-    <xsl:param>generate.section.toc.level=2
-    <xsl:param>toc.section.depth=1
-    <xsl:param>toc.max.depth=1
-    <format>pdf:<xsl:param>boost.url.prefix=http://www.boost.org/doc/libs/release/libs/functional/hash/doc/html
-    ;
+html hash.html : hash.adoc ;
+
+install html_ : hash.html : <location>html ;
+
+pdf hash.pdf : hash.adoc ;
+explicit hash.pdf ;
+
+install pdf_ : hash.pdf : <location>pdf ;
+explicit pdf_ ;
+
+###############################################################################
+alias boostdoc ;
+explicit boostdoc ;
+alias boostrelease : html_ ;
+explicit boostrelease ;

doc/changes.qbk

@@ -1,122 +0,0 @@
-
-[/ Copyright 2005-2008 Daniel James.
- / 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) ]
-
-[section:changes Change Log]
-
-[h2 Boost 1.33.0]
-
-* Initial Release
-
-[h2 Boost 1.33.1]
-
-* Fixed the points example, as pointed out by 沈慧峰.
-
-[h2 Boost 1.34.0]
-
-* Use declarations for standard classes, so that the library
-  doesn't need to include all of their headers
-* Deprecated the `<boost/functional/hash/*.hpp>` headers. Now a single header,
-  <[headerref boost/functional/hash.hpp]> is used.
-* Add support for the `BOOST_HASH_NO_EXTENSIONS` macro, which
-  disables the extensions to TR1.
-
-* Minor improvements to the hash functions for floating point numbers.
-* Update the portable example to hopefully be more generally portable.
-
-[h2 Boost 1.34.1]
-
-* [@http://svn.boost.org/trac/boost/ticket/952 Ticket 952]:
-  Suppress incorrect 64-bit warning on Visual C++.
-
-[h2 Boost 1.35.0]
-
-* Support for `long long`, `std::complex`.
-* Improved algorithm for hashing floating point numbers:
-  * Improved portablity, as described by Daniel Krügler in
-    [@http://lists.boost.org/boost-users/2005/08/13418.php
-    a post to the boost users list].
-  * Fits more information into each combine loop, which can reduce the
-    the number of times combine is called and hopefully give a better
-    quality hash function.
-  * Improved the algorithm for hashing floating point numbers.
-  * On Cygwin use a binary hash function for floating point numbers, as 
-    Cygwin doesn't have decent floating point functions for `long double`.
-  * Never uses `fpclass` which doesn't support `long double`.
-  * [@http://svn.boost.org/trac/boost/ticket/1064 Ticket 1064]:
-    Removed unnecessary use of `errno`.
-* Explicitly overload for more built in types.
-* Minor improvements to the documentation.
-* A few bug and warning fixes:
-  * [@http://svn.boost.org/trac/boost/ticket/1509 Ticket 1509]:
-    Suppress another Visual C++ warning.
-  * Some workarounds for the Sun compilers.
-
-[h2 Boost 1.36.0]
-
-* Stop using OpenBSD's dodgy `std::numeric_limits`.
-* Using the boost typedefs for `long long` and `unsigned long long`.
-* Move the extensions into their own header.
-
-[h2 Boost 1.37.0]
-
-* [@http://svn.boost.org/trac/boost/ticket/2264 Ticket 2264]:
-  In Visual C++, always use C99 float functions for `long double` and `float` as
-  the C++ overloads aren't always availables.
-
-[h2 Boost 1.38.0]
-
-* Changed the warnings in the deprecated headers from 1.34.0 to errors. These
-  will be removed in a future version of Boost.
-* Moved detail headers out of `boost/functional/detail`, since they are part of
-  functional/hash, not functional. `boost/functional/detail/container_fwd.hpp`
-  has been moved to `boost/detail/container_fwd.hpp` as it's used outside of
-  this library, the others have been moved to `boost/functional/hash/detail`.
-  
-[h2 Boost 1.39.0]
-
-* Move the hash_fwd.hpp implementation into the hash subdirectory, leaving a
-  forwarding header in the old location. You should still use the old location,
-  the new location is mainly for implementation and possible modularization.
-* [@https://svn.boost.org/trac/boost/ticket/2412 Ticket 2412]: Removed deprecated
-  headers.
-* [@https://svn.boost.org/trac/boost/ticket/2957 Ticket 2957]: Fix configuration
-  for vxworks.
-
-[h2 Boost 1.40.0]
-
-* Automatically configure the float functions using template metaprogramming
-  instead of trying to configure every possibility manually.
-* Workaround for when STLport doesn't support long double.
-
-[h2 Boost 1.42.0]
-
-* Reduce the number of warnings for Visual C++ warning level 4.
-* Some code formatting changes to fit lines into 80 characters.
-* Rename an internal namespace.
-
-[h2 Boost 1.43.0]
-
-* [@https://svn.boost.org/trac/boost/ticket/3866 Ticket 3866]:
-  Don't foward declare containers when using gcc's parallel library,
-  allow user to stop forward declaration by defining the
-  `BOOST_DETAIL_NO_CONTAINER_FWD` macro.
-* [@https://svn.boost.org/trac/boost/ticket/4038 Ticket 4038]:
-  Avoid hashing 0.5 and 0 to the same number.
-* Stop using deprecated `BOOST_HAS_*` macros.
-
-[h2 Boost 1.44.0]
-
-* Add option to prevent implicit conversions when calling `hash_value` by
-  defining `BOOST_HASH_NO_IMPLICIT_CASTS`. When using `boost::hash`
-  for a type that does not have `hash_value` declared but does have
-  an implicit conversion to a type that does, it would use that
-  implicit conversion to hash it. Which can sometimes go very wrong,
-  e.g. using a conversion to bool and only hashing to 2 possible
-  values. Since fixing this is a breaking change and was only
-  approached quite late in the release cycle with little discussion
-  it's opt-in for now. This, or something like it, will become the
-  default in a future version.
-
-[endsect]

doc/disable.qbk

@@ -1,29 +0,0 @@
-
-[/ Copyright 2005-2008 Daniel James.
- / 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) ]
-
-[section:disable Disabling The Extensions]
-
-While [classref boost::hash]'s extensions are generally useful, you might want
-to turn them of in order to check that your code will work with other
-implementations of TR1. To do this define the macro `BOOST_HASH_NO_EXTENSIONS`.
-When this macro is defined, only the specialisations detailed
-in TR1 will be declared. But, if you later undefine the macro and include
-<[headerref boost/functional/hash.hpp]> then the non-specialised form will be defined
-- activating the extensions.
-
-It is strongly recommended that you never undefine the macro - and only define
-it so that it applies to the complete translation unit, either by defining it
-at the beginning of the main source file or, preferably, by using a compiler
-switch or preference. And you really should never define it in header files.
-
-If you are writing a library which has code in the header which requires the
-extensions, then the best action is to tell users not to define the macro.
-Their code won't ['require] the macro.
-
-Translation units that are compiled with the macro defined will link with units
-that were compiled without it. This feature has been designed to avoid ODR
-violations.
-
-[endsect]

doc/hash.adoc

@@ -0,0 +1,24 @@
+= Boost.ContainerHash
+:toc: left
+:toclevels: 2
+:idprefix:
+:docinfo: private-footer
+:source-highlighter: rouge
+:nofooter:
+:sectlinks:
+:source-language: c++
+
+:leveloffset: +1
+
+include::hash/intro.adoc[]
+include::hash/tutorial.adoc[]
+include::hash/custom.adoc[]
+include::hash/combine.adoc[]
+include::hash/portability.adoc[]
+include::hash/disable.adoc[]
+include::hash/changes.adoc[]
+include::hash/rationale.adoc[]
+include::hash/ref.adoc[]
+include::hash/links.adoc[]
+include::hash/thanks.adoc[]
+include::hash/copyright.adoc[]

doc/hash.qbk

@@ -1,24 +0,0 @@
-[library Boost.Functional/Hash
-    [quickbook 1.4]
-    [authors [James, Daniel]]
-    [copyright 2005 2006 2007 2008 Daniel James]
-    [purpose A TR1 hash function object that can be extended to hash user
-        defined types]
-    [category higher-order]
-    [id hash]
-    [dirname functional/hash]
-    [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])
-    ]
-]
-
-[include:hash intro.qbk]
-[include:hash tutorial.qbk]
-[include:hash portability.qbk]
-[include:hash disable.qbk]
-[include:hash changes.qbk]
-[xinclude ref.xml]
-[include:hash links.qbk]
-[include:hash thanks.qbk]

doc/hash/changes.adoc

@@ -0,0 +1,132 @@
+[#changes]
+= Change Log
+
+:cpp: C++
+:int128: __int128
+
+:idprefix: changes_
+
+== Boost 1.67.0
+* Moved library into its own module, `container_hash`.
+* Moved headers for new module name, now at: `<boost/container_hash/hash.hpp>`, `<boost/container_hash/hash_fwd.hpp>`, `<boost/container_hash/extensions.hpp>`.
+* Added forwarding headers to support the old headers locations.
+* Support `std::string_view`, `std::error_code`, `std::error_condition`, `std::optional`, `std::variant`, `std::monostate` where available.
+* Update include paths from other Boost libraries.
+* Manually write out tuple overloads, rather than using the preprocessor to generate them. Should improve usability, due to better error messages, and easier debugging.
+* Fix tutorial example (https://svn.boost.org/trac/boost/ticket/11017[#11017]).
+* Quick fix for hashing `vector<bool>` when using lib{cpp}. Will try to introduce a more general fix in the next release.
+
+== Boost 1.66.0
+* Avoid float comparison warning when using Clang - this workaround was already in place for GCC, and was used when Clang pretends to be GCC, but the warning was appearing when running Clang in other contexts.
+
+== Boost 1.65.0
+* Support for `char16_t`, `char32_t`, `u16string`, `u32string`
+
+== Boost 1.64.0
+* Fix for recent versions of Visual {cpp} which have removed `std::unary_function` and `std::binary_function` (https://svn.boost.org/trac/boost/ticket/12353[#12353]).
+
+== Boost 1.63.0
+* Fixed some warnings.
+* Only define hash for `std::wstring` when we know we have a `wchar_t`. Otherwise there's a compile error as there's no overload for hashing the characters in wide strings (https://svn.boost.org/trac/boost/ticket/8552[#8552]).
+
+== Boost 1.58.0
+* Fixed strict aliasing violation (https://github.com/boostorg/container_hash/issues/3[GitHub #3]).
+
+== Boost 1.56.0
+* Removed some Visual {cpp} 6 workarounds.
+* Ongoing work on improving `hash_combine`. This changes the combine function which was previously defined in the reference documentation.
+
+== Boost 1.55.0
+* Simplify a SFINAE check so that it will hopefully work on Sun 5.9 (https://svn.boost.org/trac10/ticket/8822[#8822]).
+* Suppress Visual {cpp} infinite loop warning (https://svn.boost.org/trac10/ticket/8568[#8568]).
+
+== Boost 1.54.0
+* https://svn.boost.org/trac/boost/ticket/7957[Ticket 7957]: Fixed a typo.
+
+== Boost 1.53.0
+* Add support for `boost::int128_type` and `boost::uint128_type` where available - currently only `{int128}` and `unsigned {int128}` on some versions of gcc.
+* On platforms that are known to have the standard floating point functions, don't use automatic detection - which can break if there are ambiguous overloads.
+* Fix undefined behaviour when using the binary `float` hash (Thomas Heller).
+
+== Boost 1.52.0
+* Restore `enum` support, which was accidentally removed in the last version.
+* New floating point hasher - will hash the binary representation on more platforms, which should be faster.
+
+== Boost 1.51.0
+* Support the standard smart pointers.
+* `hash_value` now implemented using SFINAE to avoid implicit casts to built in types when calling it.
+* Updated to use the new config macros.
+
+== Boost 1.50.0
+* https://svn.boost.org/trac/boost/ticket/6771[Ticket 6771]: Avoid gcc's `-Wfloat-equal` warning.
+* https://svn.boost.org/trac/boost/ticket/6806[Ticket 6806]: Support `std::array` and `std::tuple` when available.
+* Add deprecation warning to the long deprecated `boost/container_hash/detail/container_fwd.hpp`.
+
+== Boost 1.46.0
+* Avoid warning due with gcc's `-Wconversion` flag.
+
+== Boost 1.44.0
+* Add option to prevent implicit conversions when calling `hash_value` by defining `BOOST_HASH_NO_IMPLICIT_CASTS`. When using `boost::hash` for a type that does not have `hash_value` declared but does have an implicit conversion to a type that does, it would use that implicit conversion to hash it. Which can sometimes go very wrong, e.g. using a conversion to `bool` and only hashing to 2 possible values. Since fixing this is a breaking change and was only approached quite late in the release cycle with little discussion it's opt-in for now. This, or something like it, will become the default in a future version.
+
+== Boost 1.43.0
+* https://svn.boost.org/trac/boost/ticket/3866[Ticket 3866]: Don't foward declare containers when using gcc's parallel library, allow user to stop forward declaration by defining the `BOOST_DETAIL_NO_CONTAINER_FWD` macro.
+* https://svn.boost.org/trac/boost/ticket/4038[Ticket 4038]: Avoid hashing `0.5` and `0` to the same number.
+* Stop using deprecated `BOOST_HAS_*` macros.
+
+== Boost 1.42.0
+* Reduce the number of warnings for Visual {cpp} warning level 4.
+* Some code formatting changes to fit lines into 80 characters.
+* Rename an internal namespace.
+
+== Boost 1.40.0
+* Automatically configure the `float` functions using template metaprogramming instead of trying to configure every possibility manually.
+* Workaround for when STLport doesn't support long double.
+
+== Boost 1.39.0
+* Move the `hash_fwd.hpp` implementation into the hash subdirectory, leaving a forwarding header in the old location. You should still use the old location, the new location is mainly for implementation and possible modularization.
+* https://svn.boost.org/trac/boost/ticket/2412[Ticket 2412]: Removed deprecated headers.
+* https://svn.boost.org/trac/boost/ticket/2957[Ticket 2957]: Fix configuration for vxworks.
+
+== Boost 1.38.0
+* Changed the warnings in the deprecated headers from 1.34.0 to errors. These will be removed in a future version of Boost.
+* Moved detail headers out of `boost/container_hash/detail`, since they are part of `functional/hash`, not `container_hash`. `boost/container_hash/detail/container_fwd.hpp` has been moved to `boost/detail/container_fwd.hpp` as it's used outside of this library, the others have been moved to `boost/functional/hash/detail`.
+
+== Boost 1.37.0
+* http://svn.boost.org/trac/boost/ticket/2264[Ticket 2264]: In Visual {cpp}, always use C99 float functions for long double and float as the {cpp} overloads aren't always availables.
+
+== Boost 1.36.0
+* Stop using OpenBSD's dodgy `std::numeric_limits`.
+* Using the boost typedefs for `long long` and `unsigned long long`.
+* Move the extensions into their own header.
+
+== Boost 1.35.0
+* Support for `long long`, `std::complex`.
+* Improved algorithm for hashing floating point numbers:
+** Improved portablity, as described by Daniel Krügler in http://lists.boost.org/boost-users/2005/08/13418.php[a post to the boost users list].
+** Fits more information into each combine loop, which can reduce the the number of times combine is called and hopefully give a better quality hash function.
+** Improved the algorithm for hashing floating point numbers.
+** On Cygwin use a binary hash function for floating point numbers, as Cygwin doesn't have decent floating point functions for `long double`.
+** Never uses `fpclass` which doesn't support `long double`.
+** http://svn.boost.org/trac/boost/ticket/1064[Ticket 1064]: Removed unnecessary use of errno.
+* Explicitly overload for more built in types.
+* Minor improvements to the documentation.
+* A few bug and warning fixes:
+** http://svn.boost.org/trac/boost/ticket/1509[Ticket 1509]: Suppress another Visual {cpp} warning.
+** Some workarounds for the Sun compilers.
+
+== Boost 1.34.1
+* https://svn.boost.org/trac10/ticket/952[Ticket 952]: Suppress incorrect 64-bit warning on Visual {cpp}.
+
+== Boost 1.34.0
+* Use declarations for standard classes, so that the library doesn't need to include all of their headers
+* Deprecated the `<boost/functional/hash/*.hpp>` headers. Now a single header, `<boost/functional/hash.hpp>` is used.
+* Add support for the `BOOST_HASH_NO_EXTENSIONS` macro, which disables the extensions to TR1.
+* Minor improvements to the hash functions for floating point numbers.
+* Update the portable example to hopefully be more generally portable.
+
+== Boost 1.33.1
+* Fixed the points example, as pointed out by 沈慧峰.
+
+== Boost 1.33.0
+* Initial Release
+

doc/hash/combine.adoc

@@ -0,0 +1,80 @@
+[#combine]
+= Combining hash values
+
+:idprefix: combine_
+
+Say you have a point class, representing a two dimensional location:
+
+[source]
+----
+class point
+{
+    int x;
+    int y;
+public:
+    point() : x(0), y(0) {}
+    point(int x, int y) : x(x), y(y) {}
+
+    bool operator==(point const& other) const
+    {
+        return x == other.x && y == other.y;
+    }
+};
+----
+
+and you wish to use it as the key for an unordered_map. You need to customise the hash for this structure. To do this we need to combine the hash values for x and y. The function `boost::hash_combine` is supplied for this purpose:
+
+[source]
+----
+class point
+{
+    ...
+
+    friend std::size_t hash_value(point const& p)
+    {
+        std::size_t seed = 0;
+        boost::hash_combine(seed, p.x);
+        boost::hash_combine(seed, p.y);
+
+        return seed;
+    }
+
+    ...
+};
+----
+
+Calls to `hash_combine` incrementally build the hash from the different members of `point`, it can be repeatedly called for any number of elements. It calls `hash_value` on the supplied element, and combines it with the seed.
+
+Full code for this example is at link:../../examples/point.cpp[/libs/container_hash/examples/point.cpp].
+
+[NOTE] 
+====
+When using `boost::hash_combine` the order of the calls matters.
+[source]
+----
+std::size_t seed = 0;
+boost::hash_combine(seed, 1);
+boost::hash_combine(seed, 2);
+----
+results in a different seed to:
+
+[source]
+----
+std::size_t seed = 0;
+boost::hash_combine(seed, 2);
+boost::hash_combine(seed, 1);
+----
+
+If you are calculating a hash value for data where the order of the data doesn't matter in comparisons (e.g. a set) you will have to ensure that the data is always supplied in the same order.
+
+====
+
+To calculate the hash of an iterator range you can use `boost::hash_range`:
+
+[source]
+----
+std::vector<std::string> some_strings;
+std::size_t hash = boost::hash_range(some_strings.begin(), some_strings.end());
+----
+
+Note that when writing template classes, you might not want to include the main hash header as it's quite an expensive include that brings in a lot of other headers, so instead you can include the `<boost/container_hash/hash_fwd.hpp>` header which forward declares `boost::hash`, `boost::hash_range` and `boost::hash_combine`. You'll need to include the main header before instantiating `boost::hash`. When using a container that uses `boost::hash` it should do that for you, so your type will work fine with the boost hash containers. There's an example of this in link:../../examples/template.hpp[template.hpp] and link:../../examples/template.cpp[template.cpp].

doc/hash/copyright.adoc

@@ -0,0 +1,10 @@
+[#copyright]
+= Copyright and License
+
+:idprefix: copyright_
+
+*Daniel James*
+
+Copyright (C) 2005-2008 Daniel James
+
+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)

doc/hash/custom.adoc

@@ -0,0 +1,68 @@
+[#custom]
+= Extending boost::hash for a custom data type
+
+:idprefix: custom_
+
+`boost::hash` is implemented by calling the function `hash_value`. The namespace isn't specified so that it can detect overloads via argument dependant lookup. So if there is a free function `hash_value` in the same namespace as a custom type, it will get called.
+
+If you have a structure `library::book`, where each book is uniquely defined by its member `id`:
+
+[source]
+----
+namespace library
+{
+    struct book
+    {
+        int id;
+        std::string author;
+        std::string title;
+
+        // ....
+    };
+
+    bool operator==(book const& a, book const& b)
+    {
+        return a.id == b.id;
+    }
+}
+----
+
+Then all you would need to do is write the function `library::hash_value`:
+
+[source]
+----
+namespace library
+{
+    std::size_t hash_value(book const& b)
+    {
+        boost::hash<int> hasher;
+        return hasher(b.id);
+    }
+}
+----
+
+And you can now use `boost::hash` with book:
+
+[source]
+----
+library::book knife(3458, "Zane Grey", "The Hash Knife Outfit");
+library::book dandelion(1354, "Paul J. Shanley",
+    "Hash & Dandelion Greens");
+
+boost::hash<library::book> book_hasher;
+std::size_t knife_hash_value = book_hasher(knife);
+
+// If std::unordered_set is available:
+std::unordered_set<library::book, boost::hash<library::book> > books;
+books.insert(knife);
+books.insert(library::book(2443, "Lindgren, Torgny", "Hash"));
+books.insert(library::book(1953, "Snyder, Bernadette M.",
+    "Heavenly Hash: A Tasty Mix of a Mother's Meditations"));
+
+assert(books.find(knife) != books.end());
+assert(books.find(dandelion) == books.end());
+----
+
+The full example can be found in: link:../../examples/books.hpp[/libs/container_hash/examples/books.hpp] and link:../../examples/books.cpp[/libs/container_hash/examples/books.cpp].
+
+TIP: When writing a hash function, first look at how the equality function works. Objects that are equal must generate the same hash value. When objects are not equal they should generate different hash values. In this object equality was based just on the id so the hash function only hashes the id. If it was based on the object's name and author then the hash function should take them into account (how to do this is discussed in the next section).

doc/hash/disable.adoc

@@ -0,0 +1,12 @@
+[#disable]
+= Disabling The Extensions
+
+:idprefix: disable_
+
+While ``boost::hash``'s extensions are generally useful, you might want to turn them of in order to check that your code will work with other implementations of TR1. To do this define the macro `BOOST_HASH_NO_EXTENSIONS`. When this macro is defined, only the specialisations detailed in TR1 will be declared. But, if you later undefine the macro and include `<boost/container_hash/hash.hpp>` then the non-specialised form will be defined - activating the extensions.
+
+It is strongly recommended that you never undefine the macro - and only define it so that it applies to the complete translation unit, either by defining it at the beginning of the main source file or, preferably, by using a compiler switch or preference. And you really should never define it in header files.
+
+If you are writing a library which has code in the header which requires the extensions, then the best action is to tell users not to define the macro. Their code won't _require_ the macro.
+
+Translation units that are compiled with the macro defined will link with units that were compiled without it. This feature has been designed to avoid ODR violations.

doc/hash/intro.adoc

@@ -0,0 +1,22 @@
+[#intro]
+= Introduction
+
+:idprefix: intro_
+
+`boost::hash` is an implementation of the https://en.wikipedia.org/wiki/Hash_function[hash function] object specified by the http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf[Draft Technical Report on C++ Library Extensions] (TR1). It is the default hash function for link:../../../unordered/index.html[Boost.Unordered], link:../../../intrusive/index.html[Boost.Intrusive]'s unordered associative containers, and link:../../../multi_index/index.html[Boost.MultiIndex]'s hash indicies and link:../../../bimap/index.html[Boost.Bimap]'s `unordered_set_of`.
+
+As it is compliant with http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf[TR1], it will work with:
+
+* integers
+* floats
+* pointers
+* strings
+
+It also implements the extension proposed by Peter Dimov in issue 6.18 of the http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1837.pdf[Library Extension Technical Report Issues List] (page 63), this adds support for:
+
+* arrays
+* `std::pair`
+* the standard containers.
+* extending `boost::hash` for custom types.
+
+NOTE: This hash function is designed to be used in containers based on the STL and is not suitable as a general purpose hash function. For more details see the <<rationale,rationale>>.

doc/hash/links.adoc

@@ -0,0 +1,12 @@
+[#links]
+= Links
+
+:idprefix: links_
+
+*A Proposal to Add Hash Tables to the Standard Library* http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2003/n1456.html The hash table proposal explains much of the design. The hash function object is discussed in Section D.
+
+*The C++ Standard Library Technical Report.* http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf Contains the hash function specification in section 6.3.2.
+
+*Library Extension Technical Report Issues List.* http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1837.pdf The library implements the extension described in Issue 6.18, pages 63-67.
+
+*Methods for Identifying Versioned and Plagiarised Documents* Timothy C. Hoad, Justin Zobel http://www.cs.rmit.edu.au/~jz/fulltext/jasist-tch.pdf Contains the hash function that `boost::hash_combine` is based on.

doc/hash/portability.adoc

@@ -0,0 +1,82 @@
+[#portability]
+= Portability
+
+:idprefix: portability_
+
+`boost::hash` is written to be as portable as possible, but unfortunately, several older compilers don't support argument dependent lookup (ADL) - the mechanism used for customisation. On those compilers custom overloads for `hash_value` needs to be declared in the `boost` namespace.
+
+On a strictly standards compliant compiler, an overload defined in the `boost` namespace won't be found when `boost::hash` is instantiated, so for these compilers the overload should only be declared in the same namespace as the class.
+
+Let's say we have a simple custom type:
+
+[source]
+----
+namespace foo
+{
+    template <class T>
+    class custom_type
+    {
+        T value;
+    public:
+        custom_type(T x) : value(x) {}
+
+        friend std::size_t hash_value(custom_type x)
+        {
+            boost::hash<int> hasher;
+            return hasher(x.value);
+        }
+    };
+}
+----
+
+On a compliant compiler, when `hash_value` is called for this type, it will look at the namespace inside the type and find `hash_value` but on a compiler which doesn't support ADL `hash_value` won't be found. To make things worse, some compilers which do support ADL won't find a friend class defined inside the class.
+
+So first move the member function out of the class:
+
+[source]
+----
+namespace foo
+{
+    template <class T>
+    class custom_type
+    {
+        T value;
+    public:
+        custom_type(T x) : value(x) {}
+
+        std::size_t hash(custom_type x)
+        {
+            boost::hash<T> hasher;
+            return hasher(value);
+        }
+    };
+
+    template <class T>
+    inline std::size_t hash_value(custom_type<T> x)
+    {
+        return x.hash();
+    }
+}
+----
+
+Unfortunately, I couldn't declare `hash_value` as a friend, as some compilers don't support template friends, so instead I declared a member function to calculate the hash, and called it from `hash_value`.
+
+For compilers which don't support ADL, `hash_value` needs to be defined in the `boost` namespace:
+
+[source]
+----
+#ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
+namespace boost
+#else
+namespace foo
+#endif
+{
+    template <class T>
+    std::size_t hash_value(foo::custom_type<T> x)
+    {
+        return x.hash();
+    }
+}
+----
+
+Full code for this example is at link:../../examples/portable.cpp[/libs/container_hash/examples/portable.cpp].

doc/hash/rationale.adoc

@@ -0,0 +1,16 @@
+[#rationale]
+= Rationale
+
+:idprefix: rationale_
+
+The rationale can be found in the original designfootnote:[issue 6.18 of the http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1837.pdf[Library Extension Technical Report Issues List] (page 63)].
+
+== Quality of the hash function
+
+Many hash functions strive to have little correlation between the input and output values. They attempt to uniformally distribute the output values for very similar inputs. This hash function makes no such attempt. In fact, for integers, the result of the hash function is often just the input value. So similar but different input values will often result in similar but different output values. This means that it is not appropriate as a general hash function. For example, a hash table may discard bits from the hash function resulting in likely collisions, or might have poor collision resolution when hash values are clustered together. In such cases this hash function will preform poorly.
+
+But the standard has no such requirement for the hash function, it just requires that the hashes of two different values are unlikely to collide. Containers or algorithms designed to work with the standard hash function will have to be implemented to work well when the hash function's output is correlated to its input. Since they are paying that cost a higher quality hash function would be wasteful.
+
+For other use cases, if you do need a higher quality hash function, then neither the standard hash function or `boost::hash` are appropriate. There are several options available. One is to use a second hash on the output of this hash function, such as http://web.archive.org/web/20121102023700/http://www.concentric.net/~Ttwang/tech/inthash.htm[Thomas Wang's hash function]. This this may not work as well as a hash algorithm tailored for the input.
+
+For strings there are several fast, high quality hash functions available (for example http://code.google.com/p/smhasher/[MurmurHash3] and http://code.google.com/p/cityhash/[Google's CityHash]), although they tend to be more machine specific. These may also be appropriate for hashing a binary representation of your data - providing that all equal values have an equal representation, which is not always the case (e.g. for floating point values).

doc/hash/ref.adoc

@@ -0,0 +1,386 @@
+[#ref]
+= Reference
+
+:idprefix: ref_
+
+For the full specification, see section 6.3 of the http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf[C++ Standard Library Technical Report] and issue 6.18 of the http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1837.pdf[Library Extension Technical Report Issues List] (page 63).
+
+== Header <boost/container_hash/hash.hpp>
+
+Defines `boost::hash`, and helper functions.
+
+[source]
+----
+namespace boost {
+  template<typename T> struct hash;
+
+  template<> struct hash<bool>;
+  template<> struct hash<char>;
+  template<> struct hash<signed char>;
+  template<> struct hash<unsigned char>;
+  template<> struct hash<wchar_t>;
+  template<> struct hash<char16_t>;
+  template<> struct hash<char32_t>;
+  template<> struct hash<short>;
+  template<> struct hash<unsigned short>;
+  template<> struct hash<int>;
+  template<> struct hash<unsigned int>;
+  template<> struct hash<long>;
+  template<> struct hash<unsigned long>;
+  template<> struct hash<long long>;
+  template<> struct hash<unsigned long long>;
+  template<> struct hash<float>;
+  template<> struct hash<double>;
+  template<> struct hash<long double>;
+  template<> struct hash<std::string>;
+  template<> struct hash<std::wstring>;
+  template<> struct hash<std::u16string>;
+  template<> struct hash<std::u32string>;
+  template<> struct hash<std::type_index>;
+
+  template<typename T> struct hash<T*>;
+
+  // Support functions (Boost extension).
+  template<typename T>
+  void hash_combine(size_t &, T const&);
+
+  template<typename It>
+  std::size_t hash_range(It, It);
+
+  template<typename It>
+  void hash_range(std::size_t&, It, It);
+
+  // Overloadable hash implementation (Boost extension).
+  std::size_t hash_value(bool);
+  std::size_t hash_value(char);
+  std::size_t hash_value(signed char);
+  std::size_t hash_value(unsigned char);
+  std::size_t hash_value(wchar_t);
+  std::size_t hash_value(char16_t);
+  std::size_t hash_value(char32_t);
+  std::size_t hash_value(short);
+  std::size_t hash_value(unsigned short);
+  std::size_t hash_value(int);
+  std::size_t hash_value(unsigned int);
+  std::size_t hash_value(long);
+  std::size_t hash_value(unsigned long);
+  std::size_t hash_value(long long);
+  std::size_t hash_value(unsigned long long);
+  std::size_t hash_value(float);
+  std::size_t hash_value(double);
+  std::size_t hash_value(long double);
+
+  template<typename T>
+  std::size_t hash_value(T* const&);
+
+  template<typename T, unsigned N>
+  std::size_t hash_value(T (&val)[N]);
+
+  template<typename T, unsigned N>
+  std::size_t hash_value(const T (&val)[N]);
+
+  template<typename Ch, typename A>
+  std::size_t hash_value(std::basic_string<Ch, std::char_traits<Ch>, A> const&);
+
+  template<typename A, typename B>
+  std::size_t hash_value(std::pair<A, B> const&);
+
+  template<typename T, typename A>
+  std::size_t hash_value(std::vector<T, A> const&);
+
+  template<typename T, typename A>
+  std::size_t hash_value(std::list<T, A> const&);
+
+  template<typename T, typename A>
+  std::size_t hash_value(std::deque<T, A> const&);
+
+  template<typename K, typename C, typename A>
+  std::size_t hash_value(std::set<K, C, A> const&);
+
+  template<typename K, typename C, typename A>
+  std::size_t hash_value(std::multiset<K, C, A> const&);
+
+  template<typename K, typename T, typename C, typename A>
+  std::size_t hash_value(std::map<K, T, C, A> const&);
+
+  template<typename K, typename T, typename C, typename A>
+  std::size_t hash_value(std::multimap<K, T, C, A> const&);
+
+  template<typename T> std::size_t hash_value(std::complex<T> const&);
+  std::size_t hash_value(std::type_index);
+
+  template<typename T, std::size_t N>
+  std::size_t hash_value(std::array<T, N> const&);
+
+  template<typename... T>
+  std::size_t hash_value(std::tuple<T...>);
+}
+----
+
+== Struct template hash
+
+=== hash
+
+`boost::hash` — A http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf[TR1] compliant hash function object.
+
+==== Synopsis
+
+[source]
+----
+// #include <boost/container_hash/hash.hpp>
+
+template<typename T> 
+struct hash : public std::unary_function<T, std::size_t> {
+  std::size_t operator()(T const&) const;
+};
+----
+
+==== Description
+
+[source]
+----
+std::size_t operator()(T const& val) const;
+----
+
+[horizontal]
+Returns:: `hash_value(val)`
+
+Notes:: The call to `hash_value` is unqualified, so that custom overloads can be found via argument dependent lookup.
++
+This is not defined when the macro `BOOST_HASH_NO_EXTENSIONS` is defined. The specializations are still defined, so only the specializations required by TR1 are defined.
++
+Forward declared in `<boost/container_hash/hash_fwd.hpp>`
++
+This hash function is not intended for general use, and isn't guaranteed to be equal during separate runs of a program - so please don't use it for any persistent storage or communication.
+
+Throws:: Only throws if `hash_value(T)` throws.
+
+== Specializations
+
+`boost::hash<T>`
+
+=== Synopsis
+
+[source]
+----
+// #include <boost/container_hash/hash.hpp>
+
+struct hash<T> {
+  std::size_t operator()(T const&) const;
+};
+----
+
+=== Description
+
+[source]
+----
+std::size_t operator()(T const val) const;
+----
+
+[horizontal]
+Returns:: Unspecified in TR1, except that equal arguments yield the same result.
++
+`hash_value(val)` in Boost.
+
+[horizontal]
+Throws:: Doesn't throw
+
+== Support functions (Boost extension).
+
+=== hash_combine
+
+[source]
+----
+template<typename T>
+void hash_combine(size_t &, T const&);
+----
+
+Called repeatedly to incrementally create a hash value from several variables.
+
+[horizontal]
+Effects:: Updates seed with a new hash value generated by combining it with the result of `hash_value(v)`. Will always produce the same result for the same combination of seed and `hash_value(v)` during the single run of a program.
+
+[horizontal]
+Notes:: `hash_value` is called without qualification, so that overloads can be found via ADL. +
++
+This is an extension to TR1 +
++
+Forward declared in `<boost/container_hash/hash_fwd.hpp>` +
++
+This hash function is not intended for general use, and isn't guaranteed to be equal during separate runs of a program - so please don't use it for any persistent storage or communication.
+
+[horizontal]
+Throws:: Only throws if `hash_value(T)` throws. Strong exception safety, as long as `hash_value(T)` also has strong exception safety.
+
+=== hash_range
+
+[source]
+----
+template<typename It>
+std::size_t hash_range(It, It);
+
+template<typename It>
+void hash_range(std::size_t&, It, It);
+----
+
+Calculate the combined hash value of the elements of an iterator range.
+
+[horizontal]
+Effects:: For the two argument overload:
++
+[source]
+----
+size_t seed = 0;
+
+for(; first != last; ++first)
+{
+    hash_combine(seed, *first);
+}
+return seed;
+----
++
+For the three arguments overload:
++
+[source]
+----
+for(; first != last; ++first)
+{
+    hash_combine(seed, *first);
+}
+----
+
+[horizontal]
+Notes:: `hash_range` is sensitive to the order of the elements so it wouldn't be appropriate to use this with an unordered container.
++
+This is an extension to TR1
++
+Forward declared in `<boost/container_hash/hash_fwd.hpp>`
++
+This hash function is not intended for general use, and isn't guaranteed to be equal during separate runs of a program - so please don't use it for any persistent storage or communication.
+
+[horizontal]
+Throws:: Only throws if `hash_value(std::iterator_traits<It>::value_type)` throws. `hash_range(std::size_t&, It, It)` has basic exception safety as long as `hash_value(std::iterator_traits<It>::value_type)` has basic exception safety.
+
+== Overloadable hash implementation (Boost extension).
+
+=== hash_value
+
+[source]
+----
+std::size_t hash_value(bool val);
+std::size_t hash_value(char val);
+std::size_t hash_value(signed char val);
+std::size_t hash_value(unsigned char val);
+std::size_t hash_value(wchar_t val);
+std::size_t hash_value(char16_t val);
+std::size_t hash_value(char32_t val);
+std::size_t hash_value(short val);
+std::size_t hash_value(unsigned short val);
+std::size_t hash_value(int val);
+std::size_t hash_value(unsigned int val);
+std::size_t hash_value(long val);
+std::size_t hash_value(unsigned long val);
+std::size_t hash_value(long long val);
+std::size_t hash_value(unsigned long long val);
+std::size_t hash_value(float val);
+std::size_t hash_value(double val);
+std::size_t hash_value(long double val);
+
+template<typename T> std::size_t hash_value(T* const& val);
+
+template<typename T, unsigned N> std::size_t hash_value(T (&val)[N]);
+template<typename T, unsigned N> std::size_t hash_value(const T (&val)[N]);
+
+template<typename Ch, typename A> 
+  std::size_t hash_value(std::basic_string<Ch, std::char_traits<Ch>, A> const& val);
+template<typename A, typename B> 
+  std::size_t hash_value(std::pair<A, B> const& val);
+template<typename T, typename A> 
+  std::size_t hash_value(std::vector<T, A> const& val);
+template<typename T, typename A> 
+  std::size_t hash_value(std::list<T, A> const& val);
+template<typename T, typename A> 
+  std::size_t hash_value(std::deque<T, A> const& val);
+template<typename K, typename C, typename A> 
+  std::size_t hash_value(std::set<K, C, A> const& val);
+template<typename K, typename C, typename A> 
+  std::size_t hash_value(std::multiset<K, C, A> const& val);
+template<typename K, typename T, typename C, typename A> 
+  std::size_t hash_value(std::map<K, T, C, A> const& val);
+template<typename K, typename T, typename C, typename A> 
+  std::size_t hash_value(std::multimap<K, T, C, A> const& val);
+template<typename T> std::size_t hash_value(std::complex<T> const& val);
+std::size_t hash_value(std::type_index val);
+template<typename T, std::size_t N> 
+  std::size_t hash_value(std::array<T, N> const& val);
+template<typename... T> 
+  std::size_t hash_value(std::tuple<T...> val);
+----
+
+Implementation of the hash function.
+
+Generally shouldn't be called directly by users, instead they should use `boost::hash`, `boost::hash_range` or `boost::hash_combine` which call `hash_value` without namespace qualification so that overloads for custom types are found via ADL.
+
+[horizontal]
+Notes:: This is an extension to TR1
++
+This hash function is not intended for general use, and isn't guaranteed to be equal during separate runs of a program - so please don't use it for any persistent storage or communication.
+
+[horizontal]
+Throws:: Only throws if a user supplied version of `hash_value` throws for an element of a container, or one of the types stored in a pair.
+
+[vertical]
+Returns::
++
+[cols="1,1", frame=all, grid=rows]
+|===
+|Types |Returns
+
+|`bool`, `char`, `signed char`, `unsigned char`, `wchar_t`, `char16_t`, `char32_t`, `short`, `unsigned short`, `int`, `unsigned int`, `long`, `unsigned long`
+|val
+
+|`long long`, `unsigned long long`
+|val when `abs(val) \<= std::numeric_limits<std::size_t>::max()`.
+
+|`float`, `double`, `long double`
+|An unspecified value, except that equal arguments shall yield the same result.
+
+|`T*`
+|An unspecified value, except that equal arguments shall yield the same result.
+
+|`T val[N]`, `const T val[N]`
+|`hash_range(val, val+N)`
+
+|`std:basic_string<Ch, std::char_traits<Ch>, A>`, `std::vector<T, A>`, `std::list<T, A>`, `std::deque<T, A>`, `std::set<K, C, A>`, `std::multiset<K, C, A>`, `std::map<K, T, C, A>`, `std::multimap<K, T, C, A>`, `std::array<T, N>`
+|`hash_range(val.begin(), val.end())`
+
+|`std::pair<A, B>`
+a|
+
+[source]
+----
+size_t seed = 0; 
+hash_combine(seed, val.first);
+hash_combine(seed, val.second);
+return seed;
+----
+
+|`std::tuple<T...>`
+a|
+
+[source]
+----
+size_t seed = 0;
+hash_combine(seed, get<0>(val));
+hash_combine(seed, get<1>(val));
+// ....
+return seed;
+----
+
+|`std::complex<T>`
+|When T is a built in type and `val.imag() == 0`, the result is equal to `hash_value(val.real())`. Otherwise an unspecified value, except that equal arguments shall yield the same result.
+
+|`std::type_index`
+|`val.hash_code()`
+
+|===

doc/hash/thanks.adoc

@@ -0,0 +1,14 @@
+[#thanks]
+= Acknowledgements
+
+:idprefix: thanks_
+
+This library is based on the design by Peter Dimov. During the initial development Joaquín M López Muñoz made many useful suggestions and contributed fixes.
+
+The formal review was managed by Thorsten Ottosen, and the library reviewed by: David Abrahams, Alberto Barbati, Topher Cooper, Caleb Epstein, Dave Harris, Chris Jefferson, Bronek Kozicki, John Maddock, Tobias Swinger, Jaap Suter, Rob Stewart and Pavel Vozenilek. Since then, further constructive criticism has been made by Daniel Krügler, Alexander Nasonov and 沈慧峰.
+
+The implementation of the hash function for pointers is based on suggestions made by Alberto Barbati and Dave Harris. Dave Harris also suggested an important improvement to `boost::hash_combine` that was taken up.
+
+Some useful improvements to the floating point hash algorithm were suggested by Daniel Krügler.
+
+The original implementation came from Jeremy B. Maitin-Shepard's hash table library, although this is a complete rewrite.

doc/hash/tutorial.adoc

@@ -0,0 +1,48 @@
+[#tutorial]
+= Tutorial
+
+:idprefix: tutorial_
+
+When using a hash index with link:../../../multi_index/index.html[Boost.MultiIndex], you don't need to do anything to use `boost::hash` as it uses it by default. To find out how to use a user-defined type, read the <<custom,section on extending boost::hash for a custom data type>>.
+
+If your standard library supplies its own implementation of the unordered associative containers and you wish to use `boost::hash`, just use an extra template parameter:
+
+[source]
+----
+std::unordered_multiset<int, boost::hash<int> >
+        set_of_ints;
+
+std::unordered_set<std::pair<int, int>, boost::hash<std::pair<int, int> > >
+        set_of_pairs;
+
+std::unordered_map<int, std::string, boost::hash<int> > map_int_to_string;
+----
+
+To use `boost::hash` directly, create an instance and call it as a function:
+
+[source]
+----
+#include <boost/container_hash/hash.hpp>
+
+int main()
+{
+    boost::hash<std::string> string_hash;
+
+    std::size_t h = string_hash("Hash me");
+}
+----
+
+For an example of generic use, here is a function to generate a vector containing the hashes of the elements of a container:
+
+[source]
+----
+template <class Container>
+std::vector<std::size_t> get_hashes(Container const& x)
+{
+    std::vector<std::size_t> hashes;
+    std::transform(x.begin(), x.end(), std::back_inserter(hashes),
+        boost::hash<typename Container::value_type>());
+
+    return hashes;
+}
+----

doc/intro.qbk

@@ -1,48 +0,0 @@
-
-[/ Copyright 2005-2008 Daniel James.
- / 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) ]
-
-[section:intro Introduction]
-
-[def __tr1-full__
-    [@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf
-    Draft Technical Report on C++ Library Extensions]]
-[def __tr1__
-    [@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf
-    TR1]]
-[def __unordered__ [link unordered Boost.Unordered]]
-[def __intrusive__ [link intrusive.unordered_set_unordered_multiset Boost.Intrusive]]
-[def __multi-index__ [@boost:/libs/multi_index/doc/index.html
-    Boost Multi-Index Containers Library]]
-[def __multi-index-short__ [@boost:/libs/multi_index/doc/index.html
-    Boost.MultiIndex]]
-[def __bimap__ [@boost:/libs/bimap/index.html Boost.Bimap]]
-[def __issues__
-    [@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1837.pdf
-    Library Extension Technical Report Issues List]]
-[def __hash-function__ [@http://en.wikipedia.org/wiki/Hash_function hash function]]
-[def __hash-table__ [@http://en.wikipedia.org/wiki/Hash_table hash table]]
-
-[classref boost::hash] is an implementation of the __hash-function__ object
-specified by the __tr1-full__ (TR1). It is the default hash function for
-__unordered__, __intrusive__'s unordered associative containers, and
-__multi-index-short__'s hash indicies and __bimap__'s `unordered_set_of`.
-
-As it is compliant with __tr1__, it will work with:
-
-* integers
-* floats
-* pointers
-* strings
-
-It also implements the extension proposed by Peter Dimov in issue 6.18 of the
-__issues__ (page 63), this adds support for:
-
-* arrays
-* `std::pair`
-* the standard containers.
-* extending [classref boost::hash] for custom types.
-
-[endsect]
-

doc/links.qbk

@@ -1,27 +0,0 @@
-
-[/ Copyright 2005-2008 Daniel James.
- / 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) ]
-
-[section:links Links]
-
-[*A Proposal to Add Hash Tables to the Standard Library]
-[@http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2003/n1456.html]
-The hash table proposal explains much of the design. The hash function object
-is discussed in Section D.
-
-[*The C++ Standard Library Technical Report.]
-[@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf]
-Contains the hash function specification in section 6.3.2.
-
-[*Library Extension Technical Report Issues List.]
-[@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1837.pdf]
-The library implements the extension described in Issue 6.18, pages 63-67.
-
-[*Methods for Identifying Versioned and Plagiarised Documents]
-Timothy C. Hoad, Justin Zobel
-[@http://www.cs.rmit.edu.au/~jz/fulltext/jasist-tch.pdf]
-Contains the hash function that [funcref boost::hash_combine] is based on.
-
-[endsect]
-

doc/portability.qbk

@@ -1,105 +0,0 @@
-
-[/ Copyright 2005-2008 Daniel James.
- / 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) ]
-
-[section:portability Portability]
-
-[def __boost_hash__ [classref boost::hash]]
-
-__boost_hash__ is written to be as portable as possible, but unfortunately, several
-older compilers don't support argument dependent lookup (ADL) - the mechanism
-used for customisation.  On those compilers custom overloads for `hash_value`
-needs to be declared in the boost namespace.
-
-On a strictly standards compliant compiler, an overload defined in the
-boost namespace won't be found when __boost_hash__ is instantiated,
-so for these compilers the overload should only be declared in the same
-namespace as the class.
-
-Let's say we have a simple custom type:
-
-    namespace foo
-    {
-        template <class T>
-        class custom_type
-        {
-            T value;
-        public:
-            custom_type(T x) : value(x) {}
-
-            friend std::size_t hash_value(custom_type x)
-            {
-                __boost_hash__<int> hasher;
-                return hasher(x.value);
-            }
-        };
-    }
-
-On a compliant compiler, when `hash_value` is called for this type,
-it will look at the namespace inside the type and find `hash_value`
-but on a compiler which doesn't support ADL `hash_value` won't be found.
-To make things worse, some compilers which do support ADL won't find
-a friend class defined inside the class.
-
-So first move the member function out of the class:
-
-    namespace foo
-    {
-        template <class T>
-        class custom_type
-        {
-            T value;
-        public:
-            custom_type(T x) : value(x) {}
-
-            std::size_t hash(custom_type x)
-            {
-                __boost_hash__<T> hasher;
-                return hasher(value);
-            }
-        };
-
-        template <class T>
-        inline std::size_t hash_value(custom_type<T> x)
-        {
-            return x.hash();
-        }
-    }
-
-Unfortunately, I couldn't declare hash_value as a friend, as some compilers
-don't support template friends, so instead I declared a member function to
-calculate the hash, and called it from hash_value.
-
-For compilers which don't support ADL, hash_value needs to be defined in the
-boost namespace:
-
-    #ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
-    namespace boost
-    #else
-    namespace foo
-    #endif
-    {
-        template <class T>
-        std::size_t hash_value(foo::custom_type<T> x)
-        {
-            return x.hash();
-        }
-    }
-
-Full code for this example is at
-[@boost:/libs/functional/hash/examples/portable.cpp /libs/functional/hash/examples/portable.cpp].
-
-[h2 Other Issues]
-
-On Visual C++ versions 6.5 and 7.0, `hash_value` isn't overloaded for built in
-arrays. __boost_hash__, [funcref boost::hash_combine] and [funcref boost::hash_range] all use a workaround to
-support built in arrays so this shouldn't be a problem in most cases.
-
-On Visual C++ versions 6.5 and 7.0, function pointers aren't currently supported.
-
-When using GCC on Solaris, `boost::hash_value(long double)` treats
-`long double`s as `double`s - so the hash function doesn't take into account the
-full range of values.
-
-[endsect]

doc/ref.xml

@@ -1,810 +0,0 @@
-
-<!--
-Copyright Daniel James 2005-2009
-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)
--->
-
-<library-reference>
-  <section id="hash.reference.specification">
-    <para>For the full specification, see section 6.3 of the
-        <ulink url="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf">C++ Standard Library Technical Report</ulink>
-        and issue 6.18 of the
-        <ulink url="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1837.pdf">Library Extension Technical Report Issues List</ulink> (page 63).
-    </para>
-  </section>
-  <header name="boost/functional/hash.hpp">
-    <para>
-      Defines <code><classname>boost::hash</classname></code>,
-      and helper functions.
-    </para>
-
-    <namespace name="boost">
-
-      <!--
-        boost::hash
-        -->
-
-      <struct name="hash">
-        <template>
-          <template-type-parameter name="T"/>
-        </template>
-
-        <inherit access="public">
-          <classname>std::unary_function&lt;T, std::size_t&gt;</classname>
-        </inherit>
-
-        <purpose><simpara>A <ulink url="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1836.pdf">TR1</ulink> compliant hash function object.</simpara></purpose>
-
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>T const&amp;</paramtype>
-          </parameter>
-          <returns><para>
-            <programlisting><functionname>hash_value</functionname>(val)</programlisting>
-          </para></returns>
-          <notes>
-            <para>
-              The call to <code><functionname>hash_value</functionname></code>
-              is unqualified, so that custom overloads can be
-              found via argument dependent lookup.
-            </para>
-            <para>
-              This is not defined when the macro <code>BOOST_HASH_NO_EXTENSIONS</code>
-              is defined. The specializations are still defined, so only the specializations
-              required by TR1 are defined.
-            </para>
-          </notes>
-          <throws><para>
-            Only throws if
-            <code><functionname>hash_value</functionname>(T)</code> throws.
-          </para></throws>
-        </method>
-      </struct>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>bool</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>bool</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>char</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>char</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>signed char</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>signed char</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>unsigned char</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>unsigned char</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>wchar_t</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>wchar_t</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>short</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>short</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>unsigned short</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>unsigned short</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>int</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>int</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>unsigned int</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>unsigned int</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>long</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>long</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>unsigned long</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>unsigned long</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>long long</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>long long</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>unsigned long long</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>unsigned long long</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>float</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>float</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>double</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>double</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>long double</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>long double</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>std::string</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>std::string const&amp;</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template></template>
-        <specialization>
-          <template-arg>std::wstring</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>std::wstring const&amp;</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-            <para><functionname>hash_value</functionname>(val) in Boost.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <struct-specialization name="hash">
-        <template>
-          <template-type-parameter name="T"/>
-        </template>
-        <specialization>
-          <template-arg>T*</template-arg>
-        </specialization>
-        <method name="operator()" cv="const">
-          <type>std::size_t</type>
-          <parameter name="val">
-            <paramtype>T*</paramtype>
-          </parameter>
-          <returns>
-            <para>Unspecified in TR1, except that equal arguments yield the same result.</para>
-          </returns>
-          <throws><para>Doesn't throw</para></throws>
-        </method>
-      </struct-specialization>
-
-      <free-function-group name="Support functions (Boost extension)."> 
-
-      <!--
-        boost::hash_combine
-        -->
-
-      <function name="hash_combine">
-        <template>
-          <template-type-parameter name="T"/>
-        </template>
-        <type>void</type>
-        <parameter name="seed"><paramtype>size_t &amp;</paramtype></parameter>
-        <parameter name="v"><paramtype>T const&amp;</paramtype></parameter>
-        <purpose><simpara>
-            Called repeatedly to incrementally create a hash value from
-            several variables.
-        </simpara></purpose>
-        <effects><programlisting>seed ^= <functionname>hash_value</functionname>(v) + 0x9e3779b9 + (seed &lt;&lt; 6) + (seed &gt;&gt; 2);</programlisting></effects>
-        <notes>
-          <para><functionname>hash_value</functionname> is called without
-          qualification, so that overloads can be found via ADL.</para>
-          <para>This is an extension to TR1</para>
-        </notes>
-        <throws>
-          Only throws if <functionname>hash_value</functionname>(T) throws.
-          Strong exception safety, as long as <functionname>hash_value</functionname>(T)
-          also has strong exception safety.
-        </throws>
-      </function>
-
-      <!--
-        boost::hash_range
-        -->
-
-      <overloaded-function name="hash_range">
-        <signature>
-          <template>
-            <template-type-parameter name="It"/>
-          </template>
-          <type>std::size_t</type>
-          <parameter name="first"><paramtype>It</paramtype></parameter>
-          <parameter name="last"><paramtype>It</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template>
-            <template-type-parameter name="It"/>
-          </template>
-          <type>void</type>
-          <parameter name="seed"><paramtype>std::size_t&amp;</paramtype></parameter>
-          <parameter name="first"><paramtype>It</paramtype></parameter>
-          <parameter name="last"><paramtype>It</paramtype></parameter>
-        </signature>
-
-        <purpose><simpara>
-            Calculate the combined hash value of the elements of an iterator
-            range.
-        </simpara></purpose>
-        <effects>
-          <para>For the two argument overload:
-<programlisting>
-size_t seed = 0;
-
-for(; first != last; ++first)
-{
-    <functionname>hash_combine</functionname>(seed, *first);
-}
-
-return seed;
-</programlisting>
-          </para>For the three arguments overload:
-<programlisting>
-for(; first != last; ++first)
-{
-    <functionname>hash_combine</functionname>(seed, *first);
-}
-</programlisting>
-          <para>
-          </para>
-        </effects>
-        <notes>
-          <para>
-            <code>hash_range</code> is sensitive to the order of the elements
-            so it wouldn't be appropriate to use this with an unordered
-            container.
-          </para>
-          <para>This is an extension to TR1</para>
-        </notes>
-        <throws><para>
-          Only throws if <code><functionname>hash_value</functionname>(std::iterator_traits&lt;It&gt;::value_type)</code>
-          throws. <code>hash_range(std::size_t&amp;, It, It)</code> has basic exception safety as long as
-          <code><functionname>hash_value</functionname>(std::iterator_traits&lt;It&gt;::value_type)</code>
-          has basic exception safety.
-        </para></throws>
-      </overloaded-function>
-
-      </free-function-group>
-
-      <free-function-group name="Overloadable hash implementation (Boost extension).">
-
-      <!--
-        boost::hash_value - integers
-        -->
-
-      <overloaded-function name="hash_value">
-        <purpose><simpara>
-            Implementation of the hash function.
-        </simpara></purpose>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>bool</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>char</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>signed char</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>unsigned char</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>wchar_t</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>short</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>unsigned short</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>int</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>unsigned int</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>long</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>unsigned long</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>long long</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>unsigned long long</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>float</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>double</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>long double</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template><template-type-parameter name="T"/></template>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>T* const&amp;</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template>
-            <template-type-parameter name="T"/>
-            <template-nontype-parameter name="N"><type>unsigned</type></template-nontype-parameter>
-          </template>
-          <type>std::size_t</type>
-          <parameter><paramtype>T (&amp;val)[N]</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template>
-            <template-type-parameter name="T"/>
-            <template-nontype-parameter name="N"><type>unsigned</type></template-nontype-parameter>
-          </template>
-          <type>std::size_t</type>
-          <parameter><paramtype>const T (&amp;val)[N]</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template>
-            <template-type-parameter name="Ch"/>
-            <template-type-parameter name="A"/>
-          </template>
-          <type>std::size_t</type>
-          <parameter name="val">
-              <paramtype>std::basic_string&lt;Ch, std::char_traits&lt;Ch&gt;, A&gt; const&amp;</paramtype>
-          </parameter>
-        </signature>
-              
-       <signature>
-          <template>
-            <template-type-parameter name="A"/>
-            <template-type-parameter name="B"/>
-          </template>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>std::pair&lt;A, B&gt; const&amp;</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template>
-            <template-type-parameter name="T"/>
-            <template-type-parameter name="A"/>
-          </template>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>std::vector&lt;T, A&gt; const&amp;</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template>
-            <template-type-parameter name="T"/>
-            <template-type-parameter name="A"/>
-          </template>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>std::list&lt;T, A&gt; const&amp;</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template>
-            <template-type-parameter name="T"/>
-            <template-type-parameter name="A"/>
-          </template>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>std::deque&lt;T, A&gt; const&amp;</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template>
-            <template-type-parameter name="K"/>
-            <template-type-parameter name="C"/>
-            <template-type-parameter name="A"/>
-          </template>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>std::set&lt;K, C, A&gt; const&amp;</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template>
-            <template-type-parameter name="K"/>
-            <template-type-parameter name="C"/>
-            <template-type-parameter name="A"/>
-          </template>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>std::multiset&lt;K, C, A&gt; const&amp;</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template>
-            <template-type-parameter name="K"/>
-            <template-type-parameter name="T"/>
-            <template-type-parameter name="C"/>
-            <template-type-parameter name="A"/>
-          </template>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>std::map&lt;K, T, C, A&gt; const&amp;</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template>
-            <template-type-parameter name="K"/>
-            <template-type-parameter name="T"/>
-            <template-type-parameter name="C"/>
-            <template-type-parameter name="A"/>
-          </template>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>std::multimap&lt;K, T, C, A&gt; const&amp;</paramtype></parameter>
-        </signature>
-
-        <signature>
-          <template>
-            <template-type-parameter name="T"/>
-          </template>
-          <type>std::size_t</type>
-          <parameter name="val"><paramtype>std::complex&lt;T&gt; const&amp;</paramtype></parameter>
-        </signature>
-
-        <description><para>
-          Generally shouldn't be called directly by users, instead they should use
-          <classname>boost::hash</classname>, <functionname>boost::hash_range</functionname>
-          or <functionname>boost::hash_combine</functionname> which
-          call <code>hash_value</code> without namespace qualification so that overloads
-          for custom types are found via ADL.
-        </para></description>
-
-        <notes>
-          <para>This is an extension to TR1</para>
-        </notes>
-
-        <throws>
-            Only throws if a user supplied version of
-            <code><functionname>hash_value</functionname></code>
-            throws for an element of a container, or
-            one of the types stored in a pair.
-        </throws>
-
-        <returns>
-          <informaltable>
-            <tgroup cols="2">
-              <thead>
-                <row>
-                  <entry>Types</entry>
-                  <entry>Returns</entry>
-                </row>
-              </thead>
-              <tbody>
-                <row>
-                  <entry><code>bool</code>,
-                    <code>char</code>, <code>signed char</code>, <code>unsigned char</code>, <code>wchar_t</code>,
-                    <code>short</code>, <code>unsigned short</code>,
-                    <code>int</code>, <code>unsigned int</code>, <code>long</code>, <code>unsigned long</code>
-                  </entry>
-                  <entry><code>val</code></entry>
-                </row>
-                <row>
-                  <entry><code>long long</code>, <code>unsigned long long</code></entry>
-                  <entry><code>val</code> when <code>abs(val) &lt;= std::numeric_limits&lt;std::size_t&gt;::max()</code>.</entry>
-                </row>
-                <row>
-                  <entry><code>float</code>, <code>double</code>, <code>long double</code></entry>
-                  <entry>An unspecified value, except that equal arguments shall yield the same result.</entry>
-                </row>
-                <row>
-                  <entry><code>T*</code></entry>
-                  <entry>An unspecified value, except that equal arguments shall yield the same result.</entry>
-                </row>
-                <row>
-                  <entry>
-                    <code>T&#160;val[N]</code>,
-                    <code>const&#160;T&#160;val[N]</code>
-                  </entry>
-                  <entry><code>hash_range(val, val+N)</code></entry>
-                </row>
-                <row>
-                  <entry>
-                    <code>std:basic_string&lt;Ch,&#160;std::char_traits&lt;Ch&gt;,&#160;A&gt;</code>,
-                    <code>std::vector&lt;T,&#160;A&gt;</code>,
-                    <code>std::list&lt;T,&#160;A&gt;</code>,
-                    <code>std::deque&lt;T,&#160;A&gt;</code>,
-                    <code>std::set&lt;K,&#160;C,&#160;A&gt;</code>,
-                    <code>std::multiset&lt;K,&#160;C,&#160;A&gt;</code>,
-                    <code>std::map&lt;K,&#160;T,&#160;C,&#160;A&gt;</code>,
-                    <code>std::multimap&lt;K,&#160;T,&#160;C,&#160;A&gt;</code>
-                  </entry>
-                  <entry><code>hash_range(val.begin(), val.end())</code></entry>
-                </row>
-                <row>
-                  <entry><code>std::pair&lt;A, B&gt;</code></entry>
-                  <entry><programlisting>size_t seed = 0;
-<functionname>hash_combine</functionname>(seed, val.first);
-<functionname>hash_combine</functionname>(seed, val.second);
-return seed;</programlisting></entry>
-                </row>
-                <row>
-                  <entry>
-                    <code>std::complex&lt;T&gt;</code>
-                  </entry>
-                  <entry>When <code>T</code> is a built in type and <code>val.imag() == 0</code>, the result is equal to <code>hash_value(val.real())</code>. Otherwise an unspecified value, except that equal arguments shall yield the same result.</entry>
-                </row>
-              </tbody>
-            </tgroup>
-          </informaltable>
-        </returns>
-      </overloaded-function>
-      </free-function-group>
-    </namespace>
-  </header>
-</library-reference>
-

doc/thanks.qbk

@@ -1,28 +0,0 @@
-
-[/ Copyright 2005-2008 Daniel James.
- / 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) ]
-
-[section:acknowledgements Acknowledgements]
-
-This library is based on the design by Peter Dimov. During the initial
-development
-Joaquín M López Muñoz made many useful suggestions and contributed fixes.
-
-The formal review was managed by Thorsten Ottosen, and the library reviewed by:
-David Abrahams, Alberto Barbati, Topher Cooper, Caleb Epstein, Dave Harris,
-Chris Jefferson, Bronek Kozicki, John Maddock, Tobias Swinger, Jaap Suter,
-Rob Stewart and Pavel Vozenilek. Since then, further constructive criticism has
-been made by Daniel Krügler, Alexander Nasonov and 沈慧峰.
-
-The implementation of the hash function for pointers is based on suggestions
-made by Alberto Barbati and Dave Harris. Dave Harris also suggested an
-important improvement to [funcref boost::hash_combine] that was taken up.
-
-Some useful improvements to the floating point hash algorithm were suggested
-by Daniel Krügler.
-
-The original implementation came from Jeremy B. Maitin-Shepard's hash table
-library, although this is a complete rewrite.
-
-[endsect]

doc/tutorial.qbk

@@ -1,202 +0,0 @@
-
-[/ Copyright 2005-2008 Daniel James.
- / 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) ]
-
-[def __multi-index-short__ [@boost:/libs/multi_index/doc/index.html
-    Boost.MultiIndex]]
-
-[section:tutorial Tutorial]
-
-When using a hash index with __multi-index-short__, you don't need to do
-anything to use [classref boost::hash] as it uses it by default.
-To find out how to use a user-defined type, read the
-[link hash.custom section on extending boost::hash for a custom data type].
-
-If your standard library supplies its own implementation of the unordered
-associative containers and you wish to use
-[classref boost::hash], just use an extra template parameter:
-
-    std::unordered_multiset<int, ``[classref boost::hash]``<int> >
-            set_of_ints;
-
-    std::unordered_set<std::pair<int, int>, ``[classref boost::hash]``<std::pair<int, int> >
-            set_of_pairs;
-
-    std::unordered_map<int, std::string, ``[classref boost::hash]``<int> > map_int_to_string;
-
-To use [classref boost::hash] directly, create an instance and call it as a function:
-
-    #include <``[headerref boost/functional/hash.hpp]``>
-
-    int main()
-    {
-        ``[classref boost::hash]``<std::string> string_hash;
-
-        std::size_t h = string_hash("Hash me");
-    }
-
-For an example of generic use, here is a function to generate a vector
-containing the hashes of the elements of a container:
-
-    template <class Container>
-    std::vector<std::size_t> get_hashes(Container const& x)
-    {
-        std::vector<std::size_t> hashes;
-        std::transform(x.begin(), x.end(), std::insert_iterator(hashes),
-            ``[classref boost::hash]``<typename Container::value_type>());
-
-        return hashes;
-    }
-
-[endsect]
-
-[section:custom Extending boost::hash for a custom data type]
-
-[classref boost::hash] is implemented by calling the function
-[funcref boost::hash_value hash_value].
-The namespace isn't specified so that it can detect overloads via argument
-dependant lookup. So if there is a free function `hash_value` in the same
-namespace as a custom type, it will get called.
-
-If you have a structure `library::book`, where each `book` is uniquely
-defined by it's member `id`:
-
-    namespace library
-    {
-        struct book
-        {
-            int id;
-            std::string author;
-            std::string title;
-
-            // ....
-        };
-
-        bool operator==(book const& a, book const& b)
-        {
-            return a.id == b.id;
-        }
-    }
-
-Then all you would need to do is write the function `library::hash_value`:
-
-    namespace library
-    {
-        std::size_t hash_value(book const& b)
-        {
-            ``[classref boost::hash]``<int> hasher;
-            return hasher(b.id);
-        }
-    }
-
-And you can now use [classref boost::hash] with book:
-
-    library::book knife(3458, "Zane Grey", "The Hash Knife Outfit");
-    library::book dandelion(1354, "Paul J. Shanley",
-        "Hash & Dandelion Greens");
-
-    ``[classref boost::hash]``<library::book> book_hasher;
-    std::size_t knife_hash_value = book_hasher(knife);
-
-    // If std::unordered_set is available:
-    std::unordered_set<library::book, ``[classref boost::hash]``<library::book> > books;
-    books.insert(knife);
-    books.insert(library::book(2443, "Lindgren, Torgny", "Hash"));
-    books.insert(library::book(1953, "Snyder, Bernadette M.",
-        "Heavenly Hash: A Tasty Mix of a Mother's Meditations"));
-
-    assert(books.find(knife) != books.end());
-    assert(books.find(dandelion) == books.end());
-
-The full example can be found in:
-[@boost:/libs/functional/hash/examples/books.hpp /libs/functional/hash/examples/books.hpp]
-and
-[@boost:/libs/functional/hash/examples/books.cpp /libs/functional/hash/examples/books.cpp].
-
-[tip
-When writing a hash function, first look at how the equality function works.
-Objects that are equal must generate the same hash value.
-When objects are not equal they should generate different hash values.
-In this object equality was based just on the id so the hash function
-only hashes the id. If it was based on the object's name and author
-then the hash function should take them into account
-(how to do this is discussed in the next section).
-]
-
-[endsect]
-
-[section:combine Combining hash values]
-
-Say you have a point class, representing a two dimensional location:
-
-    class point
-    {
-        int x;
-        int y;
-    public:
-        point() : x(0), y(0) {}
-        point(int x, int y) : x(x), y(y) {}
-
-        bool operator==(point const& other) const
-        {
-            return x == other.x && y == other.y;
-        }
-    };
-
-and you wish to use it as the key for an `unordered_map`. You need to
-customise the hash for this structure. To do this we need to combine
-the hash values for `x` and `y`. The function
-[funcref boost::hash_combine] is supplied for this purpose:
-
-    class point
-    {
-        ...
-
-        friend std::size_t hash_value(point const& p)
-        {
-            std::size_t seed = 0;
-            ``[funcref boost::hash_combine]``(seed, p.x);
-            ``[funcref boost::hash_combine]``(seed, p.y);
-
-            return seed;
-        }
-
-        ...
-    };
-
-Calls to hash_combine incrementally build the hash from the different members
-of point, it can be repeatedly called for any number of elements. It calls
-[funcref boost::hash_value hash_value] on the supplied element, and combines it with the seed.
-
-Full code for this example is at
-[@boost:/libs/functional/hash/examples/point.cpp /libs/functional/hash/examples/point.cpp].
-
-[note
-When using [funcref boost::hash_combine] the order of the
-calls matters.
-'''
-<programlisting>
-    std::size_t seed = 0;
-    boost::hash_combine(seed, 1);
-    boost::hash_combine(seed, 2);
-</programlisting>
-results in a different seed to:
-<programlisting>
-    std::size_t seed = 0;
-    boost::hash_combine(seed, 2);
-    boost::hash_combine(seed, 1);
-</programlisting>
-'''
-If you are calculating a hash value for data where the order of the data
-doesn't matter in comparisons (e.g. a set) you will have to ensure that the
-data is always supplied in the same order.
-]
-
-To calculate the hash of an iterator range you can use [funcref boost::hash_range]:
-
-    std::vector<std::string> some_strings;
-    std::size_t hash = ``[funcref boost::hash_range]``(some_strings.begin(), some_strings.end());
-
-[endsect]
-

examples/Jamfile.v2

@@ -6,3 +6,4 @@
 run books.cpp ;
 run point.cpp ;
 run portable.cpp ;
+run template.cpp ;

examples/books.cpp

@@ -4,7 +4,7 @@
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
 #include "./books.hpp"
-#include <boost/functional/hash.hpp>
+#include <boost/container_hash/hash.hpp>
 #include <cassert>
 
 // If std::unordered_set was available:

examples/point.cpp

@@ -3,7 +3,12 @@
 // 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/functional/hash.hpp>
+// Force use of assert.
+#if defined(NDEBUG)
+#undef NDEBUG
+#endif
+
+#include <boost/container_hash/hash.hpp>
 #include <cassert>
 
 // This example illustrates how to use boost::hash_combine to generate a hash

examples/portable.cpp

@@ -3,7 +3,12 @@
 // 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/functional/hash.hpp>
+// Force use of assert.
+#if defined(NDEBUG)
+#undef NDEBUG
+#endif
+
+#include <boost/container_hash/hash.hpp>
 #include <cassert>
 
 // This example illustrates how to customise boost::hash portably, so that

examples/template.cpp

@@ -0,0 +1,18 @@
+
+// Copyright 2012 Daniel James.
+// 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 "template.hpp"
+#include <cassert>
+#include <boost/unordered_set.hpp>
+
+int main()
+{
+    typedef my_pair<int, float> pair;
+    boost::unordered_set<pair> pair_set;
+    pair_set.emplace(10, 0.5f);
+
+    assert(pair_set.find(pair(10, 0.5f)) != pair_set.end());
+    assert(pair_set.find(pair(10, 0.6f)) == pair_set.end());
+}

examples/template.hpp

@@ -0,0 +1,36 @@
+
+// Copyright 2012 Daniel James.
+// 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)
+
+// This is an example of how to write a hash function for a template
+// class.
+
+#include <boost/container_hash/hash_fwd.hpp>
+
+template <typename A, typename B>
+class my_pair
+{
+    A value1;
+    B value2;
+public:
+    my_pair(A const& v1, B const& v2)
+        : value1(v1), value2(v2)
+    {}
+
+    bool operator==(my_pair const& other) const
+    {
+        return value1 == other.value1 &&
+            value2 == other.value2;
+    }
+
+    friend std::size_t hash_value(my_pair const& p)
+    {
+        std::size_t seed = 0;
+        boost::hash_combine(seed, p.value1);
+        boost::hash_combine(seed, p.value2);
+
+        return seed;
+    }
+};
+

include/boost/container_hash/detail/hash_tuple.hpp

@@ -0,0 +1,133 @@
+// Copyright 2005-2009 Daniel James.
+// Copyright 2021 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#ifndef BOOST_HASH_DETAIL_HASH_TUPLE_LIKE_HPP
+#define BOOST_HASH_DETAIL_HASH_TUPLE_LIKE_HPP
+
+#include <boost/container_hash/hash_fwd.hpp>
+#include <boost/type_traits/enable_if.hpp>
+#include <boost/config.hpp>
+
+#if defined(BOOST_NO_CXX11_HDR_TUPLE)
+
+// no support
+
+#else
+
+#include <tuple>
+
+namespace boost
+{
+namespace hash_detail
+{
+
+template <std::size_t I, typename T>
+inline typename boost::enable_if_<(I == std::tuple_size<T>::value),
+        void>::type
+    hash_combine_tuple(std::size_t&, T const&)
+{
+}
+
+template <std::size_t I, typename T>
+inline typename boost::enable_if_<(I < std::tuple_size<T>::value),
+        void>::type
+    hash_combine_tuple(std::size_t& seed, T const& v)
+{
+    boost::hash_combine(seed, std::get<I>(v));
+    boost::hash_detail::hash_combine_tuple<I + 1>(seed, v);
+}
+
+template <typename T>
+inline std::size_t hash_tuple(T const& v)
+{
+    std::size_t seed = 0;
+    boost::hash_detail::hash_combine_tuple<0>(seed, v);
+    return seed;
+}
+
+} // namespace hash_detail
+
+#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
+
+template <typename... T>
+inline std::size_t hash_value(std::tuple<T...> const& v)
+{
+    return boost::hash_detail::hash_tuple(v);
+}
+
+#else
+
+inline std::size_t hash_value(std::tuple<> const& v)
+{
+    return boost::hash_detail::hash_tuple(v);
+}
+
+template<typename A0>
+inline std::size_t hash_value(std::tuple<A0> const& v)
+{
+    return boost::hash_detail::hash_tuple(v);
+}
+
+template<typename A0, typename A1>
+inline std::size_t hash_value(std::tuple<A0, A1> const& v)
+{
+    return boost::hash_detail::hash_tuple(v);
+}
+
+template<typename A0, typename A1, typename A2>
+inline std::size_t hash_value(std::tuple<A0, A1, A2> const& v)
+{
+    return boost::hash_detail::hash_tuple(v);
+}
+
+template<typename A0, typename A1, typename A2, typename A3>
+inline std::size_t hash_value(std::tuple<A0, A1, A2, A3> const& v)
+{
+    return boost::hash_detail::hash_tuple(v);
+}
+
+template<typename A0, typename A1, typename A2, typename A3, typename A4>
+inline std::size_t hash_value(std::tuple<A0, A1, A2, A3, A4> const& v)
+{
+    return boost::hash_detail::hash_tuple(v);
+}
+
+template<typename A0, typename A1, typename A2, typename A3, typename A4, typename A5>
+inline std::size_t hash_value(std::tuple<A0, A1, A2, A3, A4, A5> const& v)
+{
+    return boost::hash_detail::hash_tuple(v);
+}
+
+template<typename A0, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6>
+inline std::size_t hash_value(std::tuple<A0, A1, A2, A3, A4, A5, A6> const& v)
+{
+    return boost::hash_detail::hash_tuple(v);
+}
+
+template<typename A0, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7>
+inline std::size_t hash_value(std::tuple<A0, A1, A2, A3, A4, A5, A6, A7> const& v)
+{
+    return boost::hash_detail::hash_tuple(v);
+}
+
+template<typename A0, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, typename A8>
+inline std::size_t hash_value(std::tuple<A0, A1, A2, A3, A4, A5, A6, A7, A8> const& v)
+{
+    return boost::hash_detail::hash_tuple(v);
+}
+
+template<typename A0, typename A1, typename A2, typename A3, typename A4, typename A5, typename A6, typename A7, typename A8, typename A9>
+inline std::size_t hash_value(std::tuple<A0, A1, A2, A3, A4, A5, A6, A7, A8, A9> const& v)
+{
+    return boost::hash_detail::hash_tuple(v);
+}
+
+#endif // #if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
+
+} // namespace boost
+
+#endif // #if defined(BOOST_NO_CXX11_HDR_TUPLE)
+
+#endif // #ifndef BOOST_HASH_DETAIL_HASH_TUPLE_LIKE_HPP

include/boost/container_hash/detail/is_contiguous_range.hpp

@@ -0,0 +1,81 @@
+// Copyright 2017, 2018 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#ifndef BOOST_HASH_DETAIL_IS_CONTIGUOUS_RANGE_HPP_INCLUDED
+#define BOOST_HASH_DETAIL_IS_CONTIGUOUS_RANGE_HPP_INCLUDED
+
+#include <boost/type_traits/integral_constant.hpp>
+#include <boost/config.hpp>
+#include <boost/config/workaround.hpp>
+
+#if !defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_SFINAE_EXPR) && !BOOST_WORKAROUND(BOOST_GCC, < 40700)
+
+#include <boost/type_traits/is_integral.hpp>
+#include <boost/type_traits/declval.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <iterator>
+
+namespace boost
+{
+namespace hash_detail
+{
+
+template<class It, class T, class S>
+    integral_constant< bool, is_same<typename std::iterator_traits<It>::value_type, T>::value && is_integral<S>::value >
+        is_contiguous_range_check( It first, It last, T const*, T const*, S );
+
+template<class T> decltype( is_contiguous_range_check( declval<T const&>().begin(), declval<T const&>().end(), declval<T const&>().data(), declval<T const&>().data() + declval<T const&>().size(), declval<T const&>().size() ) ) is_contiguous_range_( int );
+template<class T> false_type is_contiguous_range_( ... );
+
+template<class T> struct is_contiguous_range: decltype( hash_detail::is_contiguous_range_<T>( 0 ) )
+{
+};
+
+} // namespace hash_detail
+} // namespace boost
+
+#else // !defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_SFINAE_EXPR)
+
+#include <cstddef>
+#include <vector>
+#include <string>
+#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
+#include <array>
+#endif
+
+namespace boost
+{
+namespace hash_detail
+{
+
+template<class T> struct is_contiguous_range: false_type
+{
+};
+
+template<class E, class T, class A> struct is_contiguous_range< std::basic_string<E, T, A> >: true_type
+{
+};
+
+template<class E, class T, class A> struct is_contiguous_range< std::basic_string<E, T, A> const >: true_type
+{
+};
+
+#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
+
+template<class T, std::size_t N> struct is_contiguous_range< std::array<T, N> >: true_type
+{
+};
+
+template<class T, std::size_t N> struct is_contiguous_range< std::array<T, N> const >: true_type
+{
+};
+
+#endif
+
+} // namespace hash_detail
+} // namespace boost
+
+#endif // !defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_SFINAE_EXPR)
+
+#endif // #ifndef BOOST_HASH_DETAIL_IS_CONTIGUOUS_RANGE_HPP_INCLUDED

include/boost/container_hash/detail/is_range.hpp

@@ -0,0 +1,57 @@
+// Copyright 2017 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#ifndef BOOST_HASH_DETAIL_IS_RANGE_HPP_INCLUDED
+#define BOOST_HASH_DETAIL_IS_RANGE_HPP_INCLUDED
+
+#include <boost/type_traits/integral_constant.hpp>
+#include <boost/type_traits/is_integral.hpp>
+#include <boost/type_traits/declval.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <boost/type_traits/remove_cv.hpp>
+#include <boost/config.hpp>
+#include <boost/config/workaround.hpp>
+#include <iterator>
+
+namespace boost
+{
+namespace hash_detail
+{
+
+#if !defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_SFINAE_EXPR) && !BOOST_WORKAROUND(BOOST_GCC, < 40700)
+
+template<class T, class It>
+    integral_constant< bool, !is_same<typename remove_cv<T>::type, typename std::iterator_traits<It>::value_type>::value >
+        is_range_check( It first, It last );
+
+template<class T> decltype( is_range_check<T>( declval<T const&>().begin(), declval<T const&>().end() ) ) is_range_( int );
+template<class T> false_type is_range_( ... );
+
+template<class T> struct is_range: decltype( is_range_<T>( 0 ) )
+{
+};
+
+#else
+
+template<class T, class E = true_type> struct is_range_: false_type
+{
+};
+
+template<class T> struct is_range_< T, integral_constant< bool,
+        is_same<typename T::value_type, typename std::iterator_traits<typename T::const_iterator>::value_type>::value &&
+        is_integral<typename T::size_type>::value
+    > >: true_type
+{
+};
+
+template<class T> struct is_range: is_range_<T>
+{
+};
+
+#endif // !defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_SFINAE_EXPR)
+
+} // namespace hash_detail
+} // namespace boost
+
+#endif // #ifndef BOOST_HASH_DETAIL_IS_RANGE_HPP_INCLUDED

include/boost/container_hash/detail/is_unordered_range.hpp

@@ -0,0 +1,34 @@
+// Copyright 2017 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#ifndef BOOST_HASH_DETAIL_IS_UNORDERED_RANGE_HPP_INCLUDED
+#define BOOST_HASH_DETAIL_IS_UNORDERED_RANGE_HPP_INCLUDED
+
+#include <boost/container_hash/detail/is_range.hpp>
+#include <boost/type_traits/integral_constant.hpp>
+#include <boost/type_traits/is_same.hpp>
+
+namespace boost
+{
+namespace hash_detail
+{
+
+template<class T, class E = true_type> struct has_hasher_: false_type
+{
+};
+
+template<class T> struct has_hasher_< T, integral_constant< bool,
+        is_same<typename T::hasher, typename T::hasher>::value
+    > >: true_type
+{
+};
+
+template<class T> struct is_unordered_range: integral_constant< bool, is_range<T>::value && has_hasher_<T>::value >
+{
+};
+
+} // namespace hash_detail
+} // namespace boost
+
+#endif // #ifndef BOOST_HASH_DETAIL_IS_UNORDERED_RANGE_HPP_INCLUDED

include/boost/container_hash/detail/limits.hpp

@@ -0,0 +1,19 @@
+// Copyright 2005-2009 Daniel James.
+// 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_FUNCTIONAL_HASH_DETAIL_LIMITS_HEADER
+#define BOOST_FUNCTIONAL_HASH_DETAIL_LIMITS_HEADER
+
+#include <limits>
+
+namespace boost
+{
+    namespace hash_detail
+    {
+        template <class T>
+        struct limits : std::numeric_limits<T> {};
+    }
+}
+
+#endif // #ifndef BOOST_FUNCTIONAL_HASH_DETAIL_LIMITS_HEADER

include/boost/container_hash/extensions.hpp

@@ -0,0 +1,10 @@
+// Copyright 2005-2009 Daniel James.
+// 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_FUNCTIONAL_HASH_EXTENSIONS_HPP
+#define BOOST_FUNCTIONAL_HASH_EXTENSIONS_HPP
+
+#include <boost/container_hash/hash.hpp>
+
+#endif // #ifndef BOOST_FUNCTIONAL_HASH_EXTENSIONS_HPP

include/boost/container_hash/hash.hpp

@@ -0,0 +1,675 @@
+// Copyright 2005-2014 Daniel James.
+// Copyright 2021 Peter Dimov.
+// Copyright 2022 Glen Joseph Fernandes (glenjofe@gmail.com)
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+// Based on Peter Dimov's proposal
+// http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1756.pdf
+// issue 6.18.
+//
+// This also contains public domain code from MurmurHash. From the
+// MurmurHash header:
+
+// MurmurHash3 was written by Austin Appleby, and is placed in the public
+// domain. The author hereby disclaims copyright to this source code.
+
+#ifndef BOOST_FUNCTIONAL_HASH_HASH_HPP
+#define BOOST_FUNCTIONAL_HASH_HASH_HPP
+
+#include <boost/container_hash/hash_fwd.hpp>
+#include <boost/container_hash/detail/is_range.hpp>
+#include <boost/container_hash/detail/is_contiguous_range.hpp>
+#include <boost/container_hash/detail/is_unordered_range.hpp>
+#include <boost/container_hash/detail/hash_tuple.hpp>
+#include <boost/type_traits/is_enum.hpp>
+#include <boost/type_traits/is_integral.hpp>
+#include <boost/type_traits/is_floating_point.hpp>
+#include <boost/type_traits/is_signed.hpp>
+#include <boost/type_traits/is_unsigned.hpp>
+#include <boost/type_traits/make_unsigned.hpp>
+#include <boost/type_traits/enable_if.hpp>
+#include <boost/type_traits/conjunction.hpp>
+#include <boost/cstdint.hpp>
+#include <string>
+#include <iterator>
+#include <complex>
+#include <utility>
+#include <limits>
+#include <climits>
+#include <cstring>
+
+#if !defined(BOOST_NO_CXX11_SMART_PTR)
+# include <memory>
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_TYPEINDEX)
+#include <typeindex>
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_SYSTEM_ERROR)
+#include <system_error>
+#endif
+
+#if !defined(BOOST_NO_CXX17_HDR_OPTIONAL)
+#include <optional>
+#endif
+
+#if !defined(BOOST_NO_CXX17_HDR_VARIANT)
+#include <variant>
+#endif
+
+#if defined(_MSC_VER)
+#   define BOOST_FUNCTIONAL_HASH_ROTL32(x, r) _rotl(x,r)
+#else
+#   define BOOST_FUNCTIONAL_HASH_ROTL32(x, r) (x << r) | (x >> (32 - r))
+#endif
+
+namespace boost
+{
+
+    //
+    // boost::hash_value
+    //
+
+    // integral types
+
+    namespace hash_detail
+    {
+        template<class T,
+            bool bigger_than_size_t = (sizeof(T) > sizeof(std::size_t)),
+            bool is_unsigned = boost::is_unsigned<T>::value,
+            std::size_t blocks = sizeof(T) / sizeof(std::size_t)>
+        struct hash_integral_impl;
+
+        template<class T, bool is_unsigned, std::size_t blocks> struct hash_integral_impl<T, false, is_unsigned, blocks>
+        {
+            static std::size_t fn( T v )
+            {
+                return static_cast<std::size_t>( v );
+            }
+        };
+
+        template<class T, std::size_t blocks> struct hash_integral_impl<T, true, false, blocks>
+        {
+            static std::size_t fn( T v )
+            {
+                typedef typename boost::make_unsigned<T>::type U;
+
+                if( v >= 0 )
+                {
+                    return hash_integral_impl<U>::fn( static_cast<U>( v ) );
+                }
+                else
+                {
+                    return ~hash_integral_impl<U>::fn( static_cast<U>( ~static_cast<U>( v ) ) );
+                }
+            }
+        };
+
+        template<class T> struct hash_integral_impl<T, true, true, 2>
+        {
+            static std::size_t fn( T v )
+            {
+                enum {
+                    M = sizeof(std::size_t) * CHAR_BIT
+                };
+                std::size_t seed = 0;
+
+                seed ^= static_cast<std::size_t>( v >> M ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( v ) + ( seed << 6 ) + ( seed >> 2 );
+
+                return seed;
+            }
+        };
+
+        template<class T> struct hash_integral_impl<T, true, true, 4>
+        {
+            static std::size_t fn( T v )
+            {
+                enum {
+                    M1 = sizeof(std::size_t) * CHAR_BIT,
+                    M2 = M1 + M1,
+                    M3 = M2 + M1
+                };
+                std::size_t seed = 0;
+
+                seed ^= static_cast<std::size_t>( v >> M3 ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( v >> M2 ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( v >> M1 ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( v ) + ( seed << 6 ) + ( seed >> 2 );
+
+                return seed;
+            }
+        };
+
+    } // namespace hash_detail
+
+    template <typename T>
+    typename boost::enable_if_<boost::is_integral<T>::value, std::size_t>::type
+        hash_value( T v )
+    {
+        return hash_detail::hash_integral_impl<T>::fn( v );
+    }
+
+    // enumeration types
+
+    template <typename T>
+    typename boost::enable_if_<boost::is_enum<T>::value, std::size_t>::type
+        hash_value( T v )
+    {
+        return static_cast<std::size_t>( v );
+    }
+
+    // floating point types
+
+    namespace hash_detail
+    {
+        template<class T,
+            std::size_t Bits = sizeof(T) * CHAR_BIT,
+            int Digits = std::numeric_limits<T>::digits,
+            std::size_t size_t_bits = sizeof(std::size_t) * CHAR_BIT>
+        struct hash_float_impl;
+
+        // float
+        template<class T, int Digits, std::size_t size_t_bits> struct hash_float_impl<T, 32, Digits, size_t_bits>
+        {
+            static std::size_t fn( T v )
+            {
+                boost::uint32_t w;
+                std::memcpy( &w, &v, sizeof( v ) );
+
+                return w;
+            }
+        };
+
+        // double
+        template<class T, int Digits> struct hash_float_impl<T, 64, Digits, 64>
+        {
+            static std::size_t fn( T v )
+            {
+                boost::uint64_t w;
+                std::memcpy( &w, &v, sizeof( v ) );
+
+                return w;
+            }
+        };
+
+        template<class T, int Digits> struct hash_float_impl<T, 64, Digits, 32>
+        {
+            static std::size_t fn( T v )
+            {
+                boost::uint32_t w[ 2 ];
+                std::memcpy( &w, &v, sizeof( v ) );
+
+                std::size_t seed = 0;
+
+                seed ^= static_cast<std::size_t>( w[0] ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( w[1] ) + ( seed << 6 ) + ( seed >> 2 );
+
+                return seed;
+            }
+        };
+
+        // 80 bit long double in 12 bytes
+        template<class T> struct hash_float_impl<T, 96, 64, 64>
+        {
+            static std::size_t fn( T v )
+            {
+                boost::uint64_t w[ 2 ] = {};
+                std::memcpy( &w, &v, 80 / CHAR_BIT );
+
+                std::size_t seed = 0;
+
+                seed ^= static_cast<std::size_t>( w[0] ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( w[1] ) + ( seed << 6 ) + ( seed >> 2 );
+
+                return seed;
+            }
+        };
+
+        template<class T> struct hash_float_impl<T, 96, 64, 32>
+        {
+            static std::size_t fn( T v )
+            {
+                boost::uint32_t w[ 3 ] = {};
+                std::memcpy( &w, &v, 80 / CHAR_BIT );
+
+                std::size_t seed = 0;
+
+                seed ^= static_cast<std::size_t>( w[0] ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( w[1] ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( w[2] ) + ( seed << 6 ) + ( seed >> 2 );
+
+                return seed;
+            }
+        };
+
+        // 80 bit long double in 16 bytes
+        template<class T> struct hash_float_impl<T, 128, 64, 64>
+        {
+            static std::size_t fn( T v )
+            {
+                boost::uint64_t w[ 2 ] = {};
+                std::memcpy( &w, &v, 80 / CHAR_BIT );
+
+                std::size_t seed = 0;
+
+                seed ^= static_cast<std::size_t>( w[0] ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( w[1] ) + ( seed << 6 ) + ( seed >> 2 );
+
+                return seed;
+            }
+        };
+
+        template<class T> struct hash_float_impl<T, 128, 64, 32>
+        {
+            static std::size_t fn( T v )
+            {
+                boost::uint32_t w[ 3 ] = {};
+                std::memcpy( &w, &v, 80 / CHAR_BIT );
+
+                std::size_t seed = 0;
+
+                seed ^= static_cast<std::size_t>( w[0] ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( w[1] ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( w[2] ) + ( seed << 6 ) + ( seed >> 2 );
+
+                return seed;
+            }
+        };
+
+        // 128 bit long double
+        template<class T, int Digits> struct hash_float_impl<T, 128, Digits, 64>
+        {
+            static std::size_t fn( T v )
+            {
+                boost::uint64_t w[ 2 ];
+                std::memcpy( &w, &v, sizeof( v ) );
+
+                std::size_t seed = 0;
+
+                seed ^= static_cast<std::size_t>( w[0] ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( w[1] ) + ( seed << 6 ) + ( seed >> 2 );
+
+                return seed;
+            }
+        };
+
+        template<class T, int Digits> struct hash_float_impl<T, 128, Digits, 32>
+        {
+            static std::size_t fn( T v )
+            {
+                boost::uint32_t w[ 4 ];
+                std::memcpy( &w, &v, sizeof( v ) );
+
+                std::size_t seed = 0;
+
+                seed ^= static_cast<std::size_t>( w[0] ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( w[1] ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( w[2] ) + ( seed << 6 ) + ( seed >> 2 );
+                seed ^= static_cast<std::size_t>( w[3] ) + ( seed << 6 ) + ( seed >> 2 );
+
+                return seed;
+            }
+        };
+
+    } // namespace hash_detail
+
+    template <typename T>
+    typename boost::enable_if_<boost::is_floating_point<T>::value, std::size_t>::type
+        hash_value( T v )
+    {
+        return boost::hash_detail::hash_float_impl<T>::fn( v + 0 );
+    }
+
+    // pointer types
+
+    // Implementation by Alberto Barbati and Dave Harris.
+    template <class T> std::size_t hash_value( T* const& v )
+    {
+        std::size_t x = static_cast<std::size_t>(
+           reinterpret_cast<boost::uintptr_t>(v));
+        return x + (x >> 3);
+    }
+
+    // array types
+
+    template<class T, std::size_t N>
+    inline std::size_t hash_value( T const (&x)[ N ] )
+    {
+        return boost::hash_range( x, x + N );
+    }
+
+    template<class T, std::size_t N>
+    inline std::size_t hash_value( T (&x)[ N ] )
+    {
+        return boost::hash_range( x, x + N );
+    }
+
+    // complex
+
+    template <class T>
+    std::size_t hash_value( std::complex<T> const& v )
+    {
+        std::size_t re = boost::hash<T>()( v.real() );
+        std::size_t im = boost::hash<T>()( v.imag() );
+
+        im ^= re + ( im << 6 ) + ( im >> 2 );
+        return im;
+    }
+
+    // pair
+
+    template <class A, class B>
+    std::size_t hash_value( std::pair<A, B> const& v )
+    {
+        std::size_t seed = 0;
+
+        boost::hash_combine( seed, v.first );
+        boost::hash_combine( seed, v.second );
+
+        return seed;
+    }
+
+    // ranges (list, set, deque...)
+
+    template <typename T>
+    typename boost::enable_if_<hash_detail::is_range<T>::value && !hash_detail::is_contiguous_range<T>::value && !hash_detail::is_unordered_range<T>::value, std::size_t>::type
+        hash_value( T const& v )
+    {
+        return boost::hash_range( v.begin(), v.end() );
+    }
+
+    // contiguous ranges (string, vector, array)
+
+    template <typename T>
+    typename boost::enable_if_<hash_detail::is_contiguous_range<T>::value, std::size_t>::type
+        hash_value( T const& v )
+    {
+        return boost::hash_range( v.data(), v.data() + v.size() );
+    }
+
+    // unordered ranges (unordered_set, unordered_map)
+
+    template <typename T>
+    typename boost::enable_if_<hash_detail::is_unordered_range<T>::value, std::size_t>::type
+        hash_value( T const& v )
+    {
+        return boost::hash_unordered_range( v.begin(), v.end() );
+    }
+
+#if defined(BOOST_MSVC) && BOOST_MSVC >= 1910 && BOOST_MSVC < 1920 && BOOST_CXX_VERSION >= 201700L
+
+    // resolve ambiguity with unconstrained stdext::hash_value in <xhash> :-/
+
+    template<template<class...> class L, class... T>
+    typename boost::enable_if_<hash_detail::is_range<L<T...>>::value && !hash_detail::is_contiguous_range<L<T...>>::value && !hash_detail::is_unordered_range<L<T...>>::value, std::size_t>::type
+        hash_value( L<T...> const& v )
+    {
+        return boost::hash_range( v.begin(), v.end() );
+    }
+
+    // contiguous ranges (string, vector, array)
+
+    template<template<class...> class L, class... T>
+    typename boost::enable_if_<hash_detail::is_contiguous_range<L<T...>>::value, std::size_t>::type
+        hash_value( L<T...> const& v )
+    {
+        return boost::hash_range( v.data(), v.data() + v.size() );
+    }
+
+    template<template<class, std::size_t> class L, class T, std::size_t N>
+    typename boost::enable_if_<hash_detail::is_contiguous_range<L<T, N>>::value, std::size_t>::type
+        hash_value( L<T, N> const& v )
+    {
+        return boost::hash_range( v.data(), v.data() + v.size() );
+    }
+
+    // unordered ranges (unordered_set, unordered_map)
+
+    template<template<class...> class L, class... T>
+    typename boost::enable_if_<hash_detail::is_unordered_range<L<T...>>::value, std::size_t>::type
+        hash_value( L<T...> const& v )
+    {
+        return boost::hash_unordered_range( v.begin(), v.end() );
+    }
+
+#endif
+
+    // std::unique_ptr, std::shared_ptr
+
+#if !defined(BOOST_NO_CXX11_SMART_PTR)
+
+    template <typename T>
+    std::size_t hash_value( std::shared_ptr<T> const& x )
+    {
+        return boost::hash_value( x.get() );
+    }
+
+    template <typename T, typename Deleter>
+    std::size_t hash_value( std::unique_ptr<T, Deleter> const& x )
+    {
+        return boost::hash_value( x.get() );
+    }
+
+#endif
+
+    // std::type_index
+
+#if !defined(BOOST_NO_CXX11_HDR_TYPEINDEX)
+
+    inline std::size_t hash_value( std::type_index const& v )
+    {
+        return v.hash_code();
+    }
+
+#endif
+
+    // std::error_code, std::error_condition
+
+#if !defined(BOOST_NO_CXX11_HDR_SYSTEM_ERROR)
+
+    inline std::size_t hash_value( std::error_code const& v )
+    {
+        std::size_t seed = 0;
+
+        boost::hash_combine( seed, v.value() );
+        boost::hash_combine( seed, &v.category() );
+
+        return seed;
+    }
+
+    inline std::size_t hash_value( std::error_condition const& v )
+    {
+        std::size_t seed = 0;
+
+        boost::hash_combine( seed, v.value() );
+        boost::hash_combine( seed, &v.category() );
+
+        return seed;
+    }
+
+#endif
+
+    // std::optional
+
+#if !defined(BOOST_NO_CXX17_HDR_OPTIONAL)
+
+    template <typename T>
+    std::size_t hash_value( std::optional<T> const& v )
+    {
+        if( !v )
+        {
+            // Arbitray value for empty optional.
+            return 0x12345678;
+        }
+        else
+        {
+            return boost::hash<T>()(*v);
+        }
+    }
+
+#endif
+
+    // std::variant
+
+#if !defined(BOOST_NO_CXX17_HDR_VARIANT)
+
+    inline std::size_t hash_value( std::monostate )
+    {
+        return 0x87654321;
+    }
+
+    template <typename... Types>
+    std::size_t hash_value( std::variant<Types...> const& v )
+    {
+        std::size_t seed = 0;
+
+        hash_combine( seed, v.index() );
+        std::visit( [&seed](auto&& x) { hash_combine(seed, x); }, v );
+
+        return seed;
+    }
+
+#endif
+
+    //
+    // boost::hash_combine
+    //
+
+    namespace hash_detail
+    {
+
+        template<std::size_t Bits> struct hash_combine_impl
+        {
+            template <typename SizeT>
+            inline static SizeT fn(SizeT seed, SizeT value)
+            {
+                seed ^= value + 0x9e3779b9 + (seed<<6) + (seed>>2);
+                return seed;
+            }
+        };
+
+        template<> struct hash_combine_impl<32>
+        {
+            inline static boost::uint32_t fn(boost::uint32_t h1, boost::uint32_t k1)
+            {
+                const boost::uint32_t c1 = 0xcc9e2d51;
+                const boost::uint32_t c2 = 0x1b873593;
+
+                k1 *= c1;
+                k1 = BOOST_FUNCTIONAL_HASH_ROTL32(k1,15);
+                k1 *= c2;
+
+                h1 ^= k1;
+                h1 = BOOST_FUNCTIONAL_HASH_ROTL32(h1,13);
+                h1 = h1*5+0xe6546b64;
+
+                return h1;
+            }
+        };
+
+        template<> struct hash_combine_impl<64>
+        {
+            inline static boost::uint64_t fn(boost::uint64_t h, boost::uint64_t k)
+            {
+                const boost::uint64_t m = (boost::uint64_t(0xc6a4a793) << 32) + 0x5bd1e995;
+                const int r = 47;
+
+                k *= m;
+                k ^= k >> r;
+                k *= m;
+
+                h ^= k;
+                h *= m;
+
+                // Completely arbitrary number, to prevent 0's
+                // from hashing to 0.
+                h += 0xe6546b64;
+
+                return h;
+            }
+        };
+    }
+
+#if defined(BOOST_MSVC)
+#pragma warning(push)
+#if BOOST_MSVC <= 1400
+#pragma warning(disable:4267) // 'argument' : conversion from 'size_t' to
+                              // 'unsigned int', possible loss of data
+                              // A misguided attempt to detect 64-bit
+                              // incompatability.
+#endif
+#endif
+
+    template <class T>
+    inline void hash_combine(std::size_t& seed, T const& v)
+    {
+        boost::hash<T> hasher;
+        seed = boost::hash_detail::hash_combine_impl<sizeof(std::size_t) * CHAR_BIT>::fn(seed, hasher(v));
+    }
+
+#if defined(BOOST_MSVC)
+#pragma warning(pop)
+#endif
+
+    //
+    // boost::hash_range
+    //
+
+    template <class It>
+    inline std::size_t hash_range(It first, It last)
+    {
+        std::size_t seed = 0;
+
+        hash_range(seed, first, last);
+
+        return seed;
+    }
+
+    template <class It>
+    inline void hash_range(std::size_t& seed, It first, It last)
+    {
+        for(; first != last; ++first)
+        {
+            hash_combine<typename std::iterator_traits<It>::value_type>(seed, *first);
+        }
+    }
+
+    //
+    // boost::hash
+    //
+
+    template <class T> struct hash
+    {
+        typedef T argument_type;
+        typedef std::size_t result_type;
+
+        std::size_t operator()( T const& val ) const
+        {
+            return hash_value( val );
+        }
+    };
+
+#if defined(BOOST_MSVC) && BOOST_MSVC >= 1910 && BOOST_MSVC < 1920 && BOOST_CXX_VERSION >= 201700L
+
+    // msvc-14.1 has stdext::hash_value for basic_string in <xhash> :-/
+
+    template<class E, class T, class A> struct hash< std::basic_string<E, T, A> >
+    {
+        typedef std::basic_string<E, T, A> argument_type;
+        typedef std::size_t result_type;
+
+        std::size_t operator()( std::basic_string<E, T, A> const& val ) const
+        {
+            return boost::hash_value( val );
+        }
+    };
+
+#endif
+}
+
+#undef BOOST_FUNCTIONAL_HASH_ROTL32
+
+#endif // #ifndef BOOST_FUNCTIONAL_HASH_HASH_HPP

include/boost/container_hash/hash_fwd.hpp

@@ -0,0 +1,24 @@
+// Copyright 2005-2009 Daniel James.
+// Copyright 2021 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#ifndef BOOST_FUNCTIONAL_HASH_FWD_HPP
+#define BOOST_FUNCTIONAL_HASH_FWD_HPP
+
+#include <cstddef>
+
+namespace boost
+{
+    template <class T> struct hash;
+
+    template <class T> void hash_combine(std::size_t& seed, T const& v);
+
+    template <class It> std::size_t hash_range(It, It);
+    template <class It> void hash_range(std::size_t&, It, It);
+
+    template <class It> std::size_t hash_unordered_range(It, It);
+    template <class It> void hash_unordered_range(std::size_t&, It, It);
+}
+
+#endif // #ifndef BOOST_FUNCTIONAL_HASH_FWD_HPP

include/boost/functional/detail/container_fwd.hpp

@@ -1,19 +0,0 @@
-
-// Copyright 2005-2008 Daniel James.
-// 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)
-
-// Forwarding header for container_fwd.hpp's new location.
-// This header is deprecated, I'll be adding a warning in a future release,
-// then converting it to an error and finally removing this header completely.
-
-#if !defined(BOOST_FUNCTIONAL_DETAIL_CONTAINER_FWD_HPP)
-#define BOOST_FUNCTIONAL_DETAIL_CONTAINER_FWD_HPP
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-#include <boost/detail/container_fwd.hpp>
-
-#endif

include/boost/functional/hash.hpp

@@ -3,5 +3,4 @@
 // 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/functional/hash/hash.hpp>
-
+#include <boost/container_hash/hash.hpp>

include/boost/functional/hash/detail/float_functions.hpp

@@ -1,246 +0,0 @@
-
-// Copyright 2005-2009 Daniel James.
-// 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)
-
-#if !defined(BOOST_FUNCTIONAL_HASH_DETAIL_FLOAT_FUNCTIONS_HPP)
-#define BOOST_FUNCTIONAL_HASH_DETAIL_FLOAT_FUNCTIONS_HPP
-
-#include <boost/config.hpp>
-#include <boost/config/no_tr1/cmath.hpp>
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-// The C++ standard requires that the C float functions are overloarded
-// for float, double and long double in the std namespace, but some of the older
-// library implementations don't support this. On some that don't, the C99
-// float functions (frexpf, frexpl, etc.) are available.
-//
-// The following tries to automatically detect which are available.
-
-namespace boost {
-    namespace hash_detail {
-
-        // Returned by dummy versions of the float functions.
-    
-        struct not_found {
-            // Implicitly convertible to float and long double in order to avoid
-            // a compile error when the dummy float functions are used.
-
-            inline operator float() const { return 0; }
-            inline operator long double() const { return 0; }
-        };
-          
-        // A type for detecting the return type of functions.
-
-        template <typename T> struct is;
-        template <> struct is<float> { char x[10]; };
-        template <> struct is<double> { char x[20]; };
-        template <> struct is<long double> { char x[30]; };
-        template <> struct is<boost::hash_detail::not_found> { char x[40]; };
-            
-        // Used to convert the return type of a function to a type for sizeof.
-
-        template <typename T> is<T> float_type(T);
-
-        // call_ldexp
-        //
-        // This will get specialized for float and long double
-        
-        template <typename Float> struct call_ldexp
-        {
-            typedef double float_type;
-            
-            inline double operator()(double a, int b) const
-            {
-                using namespace std;
-                return ldexp(a, b);
-            }
-        };
-
-        // call_frexp
-        //
-        // This will get specialized for float and long double
-
-        template <typename Float> struct call_frexp
-        {
-            typedef double float_type;
-            
-            inline double operator()(double a, int* b) const
-            {
-                using namespace std;
-                return frexp(a, b);
-            }
-        };
-    }
-}
-            
-// A namespace for dummy functions to detect when the actual function we want
-// isn't available. ldexpl, ldexpf etc. might be added tby the macros below.
-//
-// AFAICT these have to be outside of the boost namespace, as if they're in
-// the boost namespace they'll always be preferable to any other function
-// (since the arguments are built in types, ADL can't be used).
-
-namespace boost_hash_detect_float_functions {
-    template <class Float> boost::hash_detail::not_found ldexp(Float, int);
-    template <class Float> boost::hash_detail::not_found frexp(Float, int*);    
-}
-
-// Macros for generating specializations of call_ldexp and call_frexp.
-//
-// check_cpp and check_c99 check if the C++ or C99 functions are available.
-//
-// Then the call_* functions select an appropriate implementation.
-//
-// I used c99_func in a few places just to get a unique name.
-//
-// Important: when using 'using namespace' at namespace level, include as
-// little as possible in that namespace, as Visual C++ has an odd bug which
-// can cause the namespace to be imported at the global level. This seems to
-// happen mainly when there's a template in the same namesapce.
-
-#define BOOST_HASH_CALL_FLOAT_FUNC(cpp_func, c99_func, type1, type2)    \
-namespace boost_hash_detect_float_functions {                           \
-    template <class Float>                                              \
-    boost::hash_detail::not_found c99_func(Float, type2);               \
-}                                                                       \
-                                                                        \
-namespace boost {                                                       \
-    namespace hash_detail {                                             \
-        namespace c99_func##_detect {                                   \
-            using namespace std;                                        \
-            using namespace boost_hash_detect_float_functions;          \
-                                                                        \
-            struct check {                                              \
-                static type1 x;                                         \
-                static type2 y;                                         \
-                BOOST_STATIC_CONSTANT(bool, cpp =                       \
-                    sizeof(float_type(cpp_func(x,y)))                   \
-                        == sizeof(is<type1>));                          \
-                BOOST_STATIC_CONSTANT(bool, c99 =                       \
-                    sizeof(float_type(c99_func(x,y)))                   \
-                        == sizeof(is<type1>));                          \
-            };                                                          \
-        }                                                               \
-                                                                        \
-        template <bool x>                                               \
-        struct call_c99_##c99_func :                                    \
-            boost::hash_detail::call_##cpp_func<double> {};             \
-                                                                        \
-        template <>                                                     \
-        struct call_c99_##c99_func<true> {                              \
-            typedef type1 float_type;                                   \
-                                                                        \
-            template <typename T>                                       \
-            inline type1 operator()(type1 a, T b)  const                \
-            {                                                           \
-                using namespace std;                                    \
-                return c99_func(a, b);                                  \
-            }                                                           \
-        };                                                              \
-                                                                        \
-        template <bool x>                                               \
-        struct call_cpp_##c99_func :                                    \
-            call_c99_##c99_func<                                        \
-                ::boost::hash_detail::c99_func##_detect::check::c99     \
-            > {};                                                       \
-                                                                        \
-        template <>                                                     \
-        struct call_cpp_##c99_func<true> {                              \
-            typedef type1 float_type;                                   \
-                                                                        \
-            template <typename T>                                       \
-            inline type1 operator()(type1 a, T b)  const                \
-            {                                                           \
-                using namespace std;                                    \
-                return cpp_func(a, b);                                  \
-            }                                                           \
-        };                                                              \
-                                                                        \
-        template <>                                                     \
-        struct call_##cpp_func<type1> :                                 \
-            call_cpp_##c99_func<                                        \
-                ::boost::hash_detail::c99_func##_detect::check::cpp     \
-            > {};                                                       \
-    }                                                                   \
-}
-
-#define BOOST_HASH_CALL_FLOAT_MACRO(cpp_func, c99_func, type1, type2)   \
-namespace boost {                                                       \
-    namespace hash_detail {                                             \
-                                                                        \
-        template <>                                                     \
-        struct call_##cpp_func<type1> {                                 \
-            typedef type1 float_type;                                   \
-            inline type1 operator()(type1 x, type2 y) const {           \
-                return c99_func(x, y);                                  \
-            }                                                           \
-        };                                                              \
-    }                                                                   \
-}
-
-#if defined(ldexpf)
-BOOST_HASH_CALL_FLOAT_MACRO(ldexp, ldexpf, float, int)
-#else
-BOOST_HASH_CALL_FLOAT_FUNC(ldexp, ldexpf, float, int)
-#endif
-
-#if defined(ldexpl)
-BOOST_HASH_CALL_FLOAT_MACRO(ldexp, ldexpl, long double, int)
-#else
-BOOST_HASH_CALL_FLOAT_FUNC(ldexp, ldexpl, long double, int)
-#endif
-
-#if defined(frexpf)
-BOOST_HASH_CALL_FLOAT_MACRO(frexp, frexpf, float, int*)
-#else
-BOOST_HASH_CALL_FLOAT_FUNC(frexp, frexpf, float, int*)
-#endif
-
-#if defined(frexpl)
-BOOST_HASH_CALL_FLOAT_MACRO(frexp, frexpl, long double, int*)
-#else
-BOOST_HASH_CALL_FLOAT_FUNC(frexp, frexpl, long double, int*)
-#endif
-
-#undef BOOST_HASH_CALL_FLOAT_MACRO
-#undef BOOST_HASH_CALL_FLOAT_FUNC
-
-
-namespace boost
-{
-    namespace hash_detail
-    {
-        template <typename Float1, typename Float2>
-        struct select_hash_type_impl {
-            typedef double type;
-        };
-
-        template <>
-        struct select_hash_type_impl<float, float> {
-            typedef float type;
-        };
-
-        template <>
-        struct select_hash_type_impl<long double, long double> {
-            typedef long double type;
-        };
-
-
-        // select_hash_type
-        //
-        // If there is support for a particular floating point type, use that
-        // otherwise use double (there's always support for double).
-             
-        template <typename Float>
-        struct select_hash_type : select_hash_type_impl<
-                BOOST_DEDUCED_TYPENAME call_ldexp<Float>::float_type,
-                BOOST_DEDUCED_TYPENAME call_frexp<Float>::float_type
-            > {};            
-    }
-}
-
-#endif

include/boost/functional/hash/detail/hash_float.hpp

@@ -1,101 +0,0 @@
-
-// Copyright 2005-2009 Daniel James.
-// 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)
-
-#if !defined(BOOST_FUNCTIONAL_HASH_DETAIL_HASH_FLOAT_HEADER)
-#define BOOST_FUNCTIONAL_HASH_DETAIL_HASH_FLOAT_HEADER
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-#include <boost/config.hpp>
-#include <boost/functional/hash/detail/float_functions.hpp>
-#include <boost/functional/hash/detail/limits.hpp>
-#include <boost/integer/static_log2.hpp>
-#include <boost/cstdint.hpp>
-#include <boost/assert.hpp>
-
-// Include hash implementation for the current platform.
-
-// Cygwn
-#if defined(__CYGWIN__)
-#  if defined(__i386__) || defined(_M_IX86)
-#    include <boost/functional/hash/detail/hash_float_x86.hpp>
-#  else
-#    include <boost/functional/hash/detail/hash_float_generic.hpp>
-#  endif
-#else
-#  include <boost/functional/hash/detail/hash_float_generic.hpp>
-#endif
-
-// Can we use fpclassify?
-
-// STLport
-#if defined(__SGI_STL_PORT) || defined(_STLPORT_VERSION)
-#define BOOST_HASH_USE_FPCLASSIFY 0
-
-// GNU libstdc++ 3
-#elif defined(__GLIBCPP__) || defined(__GLIBCXX__)
-#  if (defined(__USE_ISOC99) || defined(_GLIBCXX_USE_C99_MATH)) && \
-      !(defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__))
-#    define BOOST_HASH_USE_FPCLASSIFY 1
-#  else
-#    define BOOST_HASH_USE_FPCLASSIFY 0
-#  endif
-
-// Everything else
-#else
-#  define BOOST_HASH_USE_FPCLASSIFY 0
-#endif
-
-#if BOOST_HASH_USE_FPCLASSIFY
-
-#include <boost/config/no_tr1/cmath.hpp>
-
-namespace boost
-{
-    namespace hash_detail
-    {
-        template <class T>
-        inline std::size_t float_hash_value(T v)
-        {
-            using namespace std;
-            switch (fpclassify(v)) {
-            case FP_ZERO:
-                return 0;
-            case FP_INFINITE:
-                return (std::size_t)(v > 0 ? -1 : -2);
-            case FP_NAN:
-                return (std::size_t)(-3);
-            case FP_NORMAL:
-            case FP_SUBNORMAL:
-                return float_hash_impl(v);
-            default:
-                BOOST_ASSERT(0);
-                return 0;
-            }
-        }
-    }
-}
-
-#else // !BOOST_HASH_USE_FPCLASSIFY
-
-namespace boost
-{
-    namespace hash_detail
-    {
-        template <class T>
-        inline std::size_t float_hash_value(T v)
-        {
-            return v == 0 ? 0 : float_hash_impl(v);
-        }
-    }
-}
-
-#endif // BOOST_HASH_USE_FPCLASSIFY
-
-#undef BOOST_HASH_USE_FPCLASSIFY
-
-#endif

include/boost/functional/hash/detail/hash_float_generic.hpp

@@ -1,91 +0,0 @@
-
-// Copyright 2005-2009 Daniel James.
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-// A general purpose hash function for non-zero floating point values.
-
-#if !defined(BOOST_FUNCTIONAL_HASH_DETAIL_HASH_FLOAT_GENERIC_HEADER)
-#define BOOST_FUNCTIONAL_HASH_DETAIL_HASH_FLOAT_GENERIC_HEADER
-
-#include <boost/functional/hash/detail/float_functions.hpp>
-#include <boost/integer/static_log2.hpp>
-#include <boost/functional/hash/detail/limits.hpp>
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-#if defined(BOOST_MSVC)
-#pragma warning(push)
-#if BOOST_MSVC >= 1400
-#pragma warning(disable:6294) // Ill-defined for-loop: initial condition does
-                              // not satisfy test. Loop body not executed 
-#endif
-#endif
-
-namespace boost
-{
-    namespace hash_detail
-    {
-        inline void hash_float_combine(std::size_t& seed, std::size_t value)
-        {
-            seed ^= value + (seed<<6) + (seed>>2);
-        }
-
-        template <class T>
-        inline std::size_t float_hash_impl2(T v)
-        {
-            boost::hash_detail::call_frexp<T> frexp;
-            boost::hash_detail::call_ldexp<T> ldexp;
-        
-            int exp = 0;
-
-            v = frexp(v, &exp);
-
-            // A postive value is easier to hash, so combine the
-            // sign with the exponent and use the absolute value.
-            if(v < 0) {
-                v = -v;
-                exp += limits<T>::max_exponent -
-                    limits<T>::min_exponent;
-            }
-
-            v = ldexp(v, limits<std::size_t>::digits);
-            std::size_t seed = static_cast<std::size_t>(v);
-            v -= seed;
-
-            // ceiling(digits(T) * log2(radix(T))/ digits(size_t)) - 1;
-            std::size_t const length
-                = (limits<T>::digits *
-                        boost::static_log2<limits<T>::radix>::value
-                        + limits<std::size_t>::digits - 1)
-                / limits<std::size_t>::digits;
-
-            for(std::size_t i = 0; i != length; ++i)
-            {
-                v = ldexp(v, limits<std::size_t>::digits);
-                std::size_t part = static_cast<std::size_t>(v);
-                v -= part;
-                hash_float_combine(seed, part);
-            }
-
-            hash_float_combine(seed, exp);
-
-            return seed;
-        }
-
-        template <class T>
-        inline std::size_t float_hash_impl(T v)
-        {
-            typedef BOOST_DEDUCED_TYPENAME select_hash_type<T>::type type;
-            return float_hash_impl2(static_cast<type>(v));
-        }
-    }
-}
-
-#if defined(BOOST_MSVC)
-#pragma warning(pop)
-#endif
-
-#endif

include/boost/functional/hash/detail/hash_float_x86.hpp

@@ -1,56 +0,0 @@
-
-// Copyright 2005-2009 Daniel James.
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-// A non-portable hash function form non-zero floats on x86.
-//
-// Even if you're on an x86 platform, this might not work if their floating
-// point isn't set up as this expects. So this should only be used if it's
-// absolutely certain that it will work.
-
-#if !defined(BOOST_FUNCTIONAL_HASH_DETAIL_HASH_FLOAT_X86_HEADER)
-#define BOOST_FUNCTIONAL_HASH_DETAIL_HASH_FLOAT_X86_HEADER
-
-#include <boost/cstdint.hpp>
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-namespace boost
-{
-    namespace hash_detail
-    {
-        inline void hash_float_combine(std::size_t& seed, std::size_t value)
-        {
-            seed ^= value + (seed<<6) + (seed>>2);
-        }
-
-        inline std::size_t float_hash_impl(float v)
-        {
-            boost::uint32_t* ptr = (boost::uint32_t*)&v;
-            std::size_t seed = *ptr;
-            return seed;
-        }
-
-        inline std::size_t float_hash_impl(double v)
-        {
-            boost::uint32_t* ptr = (boost::uint32_t*)&v;
-            std::size_t seed = *ptr++;
-            hash_float_combine(seed, *ptr);
-            return seed;
-        }
-
-        inline std::size_t float_hash_impl(long double v)
-        {
-            boost::uint32_t* ptr = (boost::uint32_t*)&v;
-            std::size_t seed = *ptr++;
-            hash_float_combine(seed, *ptr++);
-            hash_float_combine(seed, *(boost::uint16_t*)ptr);
-            return seed;
-        }
-    }
-}
-
-#endif

include/boost/functional/hash/detail/limits.hpp

@@ -1,61 +0,0 @@
-
-// Copyright 2005-2009 Daniel James.
-// 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)
-//
-// On some platforms std::limits gives incorrect values for long double.
-// This tries to work around them.
-
-#if !defined(BOOST_FUNCTIONAL_HASH_DETAIL_LIMITS_HEADER)
-#define BOOST_FUNCTIONAL_HASH_DETAIL_LIMITS_HEADER
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-#include <boost/limits.hpp>
-
-// On OpenBSD, numeric_limits is not reliable for long doubles, but
-// the macros defined in <float.h> are and support long double when STLport
-// doesn't.
-
-#if defined(__OpenBSD__) || defined(_STLP_NO_LONG_DOUBLE)
-#include <float.h>
-#endif
-
-namespace boost
-{
-    namespace hash_detail
-    {
-        template <class T>
-        struct limits : std::numeric_limits<T> {};
-
-#if defined(__OpenBSD__) || defined(_STLP_NO_LONG_DOUBLE)
-        template <>
-        struct limits<long double>
-             : std::numeric_limits<long double>
-        {
-            static long double epsilon() {
-                return LDBL_EPSILON;
-            }
-
-            static long double (max)() {
-                return LDBL_MAX;
-            }
-
-            static long double (min)() {
-                return LDBL_MIN;
-            }
-
-            BOOST_STATIC_CONSTANT(int, digits = LDBL_MANT_DIG);
-            BOOST_STATIC_CONSTANT(int, max_exponent = LDBL_MAX_EXP);
-            BOOST_STATIC_CONSTANT(int, min_exponent = LDBL_MIN_EXP);
-#if defined(_STLP_NO_LONG_DOUBLE)
-            BOOST_STATIC_CONSTANT(int, radix = FLT_RADIX);
-#endif
-        };
-#endif // __OpenBSD__
-    }
-}
-
-#endif

include/boost/functional/hash/extensions.hpp

@@ -1,286 +1,6 @@
 
-// Copyright 2005-2009 Daniel James.
+// Copyright 2017 Daniel James.
 // 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)
 
-//  Based on Peter Dimov's proposal
-//  http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1756.pdf
-//  issue 6.18. 
-
-// This implements the extensions to the standard.
-// It's undocumented, so you shouldn't use it....
-
-#if !defined(BOOST_FUNCTIONAL_HASH_EXTENSIONS_HPP)
-#define BOOST_FUNCTIONAL_HASH_EXTENSIONS_HPP
-
-#include <boost/functional/hash/hash.hpp>
-#include <boost/detail/container_fwd.hpp>
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-#if defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
-#include <boost/type_traits/is_array.hpp>
-#endif
-
-#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
-#include <boost/type_traits/is_const.hpp>
-#endif
-
-namespace boost
-{
-    template <class A, class B>
-    std::size_t hash_value(std::pair<A, B> const&);
-    template <class T, class A>
-    std::size_t hash_value(std::vector<T, A> const&);
-    template <class T, class A>
-    std::size_t hash_value(std::list<T, A> const& v);
-    template <class T, class A>
-    std::size_t hash_value(std::deque<T, A> const& v);
-    template <class K, class C, class A>
-    std::size_t hash_value(std::set<K, C, A> const& v);
-    template <class K, class C, class A>
-    std::size_t hash_value(std::multiset<K, C, A> const& v);
-    template <class K, class T, class C, class A>
-    std::size_t hash_value(std::map<K, T, C, A> const& v);
-    template <class K, class T, class C, class A>
-    std::size_t hash_value(std::multimap<K, T, C, A> const& v);
-
-    template <class T>
-    std::size_t hash_value(std::complex<T> const&);
-
-    template <class A, class B>
-    std::size_t hash_value(std::pair<A, B> const& v)
-    {
-        std::size_t seed = 0;
-        hash_combine(seed, v.first);
-        hash_combine(seed, v.second);
-        return seed;
-    }
-
-    template <class T, class A>
-    std::size_t hash_value(std::vector<T, A> const& v)
-    {
-        return hash_range(v.begin(), v.end());
-    }
-
-    template <class T, class A>
-    std::size_t hash_value(std::list<T, A> const& v)
-    {
-        return hash_range(v.begin(), v.end());
-    }
-
-    template <class T, class A>
-    std::size_t hash_value(std::deque<T, A> const& v)
-    {
-        return hash_range(v.begin(), v.end());
-    }
-
-    template <class K, class C, class A>
-    std::size_t hash_value(std::set<K, C, A> const& v)
-    {
-        return hash_range(v.begin(), v.end());
-    }
-
-    template <class K, class C, class A>
-    std::size_t hash_value(std::multiset<K, C, A> const& v)
-    {
-        return hash_range(v.begin(), v.end());
-    }
-
-    template <class K, class T, class C, class A>
-    std::size_t hash_value(std::map<K, T, C, A> const& v)
-    {
-        return hash_range(v.begin(), v.end());
-    }
-
-    template <class K, class T, class C, class A>
-    std::size_t hash_value(std::multimap<K, T, C, A> const& v)
-    {
-        return hash_range(v.begin(), v.end());
-    }
-
-    template <class T>
-    std::size_t hash_value(std::complex<T> const& v)
-    {
-        boost::hash<T> hasher;
-        std::size_t seed = hasher(v.imag());
-        seed ^= hasher(v.real()) + (seed<<6) + (seed>>2);
-        return seed;
-    }
-
-    //
-    // call_hash_impl
-    //
-
-    // On compilers without function template ordering, this deals with arrays.
-
-#if defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
-    namespace hash_detail
-    {
-        template <bool IsArray>
-        struct call_hash_impl
-        {
-            template <class T>
-            struct inner
-            {
-                static std::size_t call(T const& v)
-                {
-                    using namespace boost;
-                    return hash_value(v);
-                }
-            };
-        };
-
-        template <>
-        struct call_hash_impl<true>
-        {
-            template <class Array>
-            struct inner
-            {
-#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
-                static std::size_t call(Array const& v)
-#else
-                static std::size_t call(Array& v)
-#endif
-                {
-                    const int size = sizeof(v) / sizeof(*v);
-                    return boost::hash_range(v, v + size);
-                }
-            };
-        };
-
-        template <class T>
-        struct call_hash
-            : public call_hash_impl<boost::is_array<T>::value>
-                ::BOOST_NESTED_TEMPLATE inner<T>
-        {
-        };
-    }
-#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING
-
-    //
-    // boost::hash
-    //
-
-
-#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
-
-    template <class T> struct hash
-        : std::unary_function<T, std::size_t>
-    {
-#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
-        std::size_t operator()(T const& val) const
-        {
-            return hash_value(val);
-        }
-#else
-        std::size_t operator()(T const& val) const
-        {
-            return hash_detail::call_hash<T>::call(val);
-        }
-#endif
-    };
-
-#if BOOST_WORKAROUND(__DMC__, <= 0x848)
-    template <class T, unsigned int n> struct hash<T[n]>
-        : std::unary_function<T[n], std::size_t>
-    {
-        std::size_t operator()(const T* val) const
-        {
-            return boost::hash_range(val, val+n);
-        }
-    };
-#endif
-
-#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
-
-    // On compilers without partial specialization, boost::hash<T>
-    // has already been declared to deal with pointers, so just
-    // need to supply the non-pointer version of hash_impl.
-
-    namespace hash_detail
-    {
-        template <bool IsPointer>
-        struct hash_impl;
-
-#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
-
-        template <>
-        struct hash_impl<false>
-        {
-            template <class T>
-            struct inner
-                : std::unary_function<T, std::size_t>
-            {
-#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
-                std::size_t operator()(T const& val) const
-                {
-                    return hash_value(val);
-                }
-#else
-                std::size_t operator()(T const& val) const
-                {
-                    return hash_detail::call_hash<T>::call(val);
-                }
-#endif
-            };
-        };
-
-#else // Visual C++ 6.5
-
-        // Visual C++ 6.5 has problems with nested member functions and
-        // applying const to const types in templates. So we get this:
-
-        template <bool IsConst>
-        struct hash_impl_msvc
-        {
-            template <class T>
-            struct inner
-                : public std::unary_function<T, std::size_t>
-            {
-                std::size_t operator()(T const& val) const
-                {
-                    return hash_detail::call_hash<T const>::call(val);
-                }
-
-                std::size_t operator()(T& val) const
-                {
-                    return hash_detail::call_hash<T>::call(val);
-                }
-            };
-        };
-
-        template <>
-        struct hash_impl_msvc<true>
-        {
-            template <class T>
-            struct inner
-                : public std::unary_function<T, std::size_t>
-            {
-                std::size_t operator()(T& val) const
-                {
-                    return hash_detail::call_hash<T>::call(val);
-                }
-            };
-        };
-        
-        template <class T>
-        struct hash_impl_msvc2
-            : public hash_impl_msvc<boost::is_const<T>::value>
-                    ::BOOST_NESTED_TEMPLATE inner<T> {};
-        
-        template <>
-        struct hash_impl<false>
-        {
-            template <class T>
-            struct inner : public hash_impl_msvc2<T> {};
-        };
-
-#endif // Visual C++ 6.5
-    }
-#endif  // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
-}
-
-#endif
+#include <boost/container_hash/extensions.hpp>

include/boost/functional/hash/hash.hpp

@@ -3,509 +3,4 @@
 // 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)
 
-//  Based on Peter Dimov's proposal
-//  http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1756.pdf
-//  issue 6.18. 
-
-#if !defined(BOOST_FUNCTIONAL_HASH_HASH_HPP)
-#define BOOST_FUNCTIONAL_HASH_HASH_HPP
-
-#include <boost/functional/hash/hash_fwd.hpp>
-#include <functional>
-#include <boost/functional/hash/detail/hash_float.hpp>
-#include <string>
-#include <boost/limits.hpp>
-
-#if defined(BOOST_HASH_NO_IMPLICIT_CASTS)
-#include <boost/static_assert.hpp>
-#endif
-
-#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
-#include <boost/type_traits/is_pointer.hpp>
-#endif
-
-#if BOOST_WORKAROUND(__GNUC__, < 3) \
-    && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
-#define BOOST_HASH_CHAR_TRAITS string_char_traits
-#else
-#define BOOST_HASH_CHAR_TRAITS char_traits
-#endif
-
-namespace boost
-{
-#if defined(BOOST_HASH_NO_IMPLICIT_CASTS)
-
-    // If you get a static assertion here, it's because hash_value
-    // isn't declared for your type.
-    template <typename T>
-    std::size_t hash_value(T const&) {
-        BOOST_STATIC_ASSERT((T*) 0 && false);
-        return 0;
-    }
-
-#endif
-
-    std::size_t hash_value(bool);
-    std::size_t hash_value(char);
-    std::size_t hash_value(unsigned char);
-    std::size_t hash_value(signed char);
-    std::size_t hash_value(short);
-    std::size_t hash_value(unsigned short);
-    std::size_t hash_value(int);
-    std::size_t hash_value(unsigned int);
-    std::size_t hash_value(long);
-    std::size_t hash_value(unsigned long);
-
-#if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
-    std::size_t hash_value(wchar_t);
-#endif
-    
-#if !defined(BOOST_NO_LONG_LONG)
-    std::size_t hash_value(boost::long_long_type);
-    std::size_t hash_value(boost::ulong_long_type);
-#endif
-
-#if !BOOST_WORKAROUND(__DMC__, <= 0x848)
-    template <class T> std::size_t hash_value(T* const&);
-#else
-    template <class T> std::size_t hash_value(T*);
-#endif
-
-#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
-    template< class T, unsigned N >
-    std::size_t hash_value(const T (&x)[N]);
-
-    template< class T, unsigned N >
-    std::size_t hash_value(T (&x)[N]);
-#endif
-
-    std::size_t hash_value(float v);
-    std::size_t hash_value(double v);
-    std::size_t hash_value(long double v);
-
-    template <class Ch, class A>
-    std::size_t hash_value(
-        std::basic_string<Ch, std::BOOST_HASH_CHAR_TRAITS<Ch>, A> const&);
-
-    // Implementation
-
-    namespace hash_detail
-    {
-        template <class T>
-        inline std::size_t hash_value_signed(T val)
-        {
-             const int size_t_bits = std::numeric_limits<std::size_t>::digits;
-             // ceiling(std::numeric_limits<T>::digits / size_t_bits) - 1
-             const int length = (std::numeric_limits<T>::digits - 1)
-                 / size_t_bits;
-
-             std::size_t seed = 0;
-             T positive = val < 0 ? -1 - val : val;
-
-             // Hopefully, this loop can be unrolled.
-             for(unsigned int i = length * size_t_bits; i > 0; i -= size_t_bits)
-             {
-                 seed ^= (std::size_t) (positive >> i) + (seed<<6) + (seed>>2);
-             }
-             seed ^= (std::size_t) val + (seed<<6) + (seed>>2);
-
-             return seed;
-        }
-
-        template <class T>
-        inline std::size_t hash_value_unsigned(T val)
-        {
-             const int size_t_bits = std::numeric_limits<std::size_t>::digits;
-             // ceiling(std::numeric_limits<T>::digits / size_t_bits) - 1
-             const int length = (std::numeric_limits<T>::digits - 1)
-                 / size_t_bits;
-
-             std::size_t seed = 0;
-
-             // Hopefully, this loop can be unrolled.
-             for(unsigned int i = length * size_t_bits; i > 0; i -= size_t_bits)
-             {
-                 seed ^= (std::size_t) (val >> i) + (seed<<6) + (seed>>2);
-             }
-             seed ^= (std::size_t) val + (seed<<6) + (seed>>2);
-
-             return seed;
-        }
-    }
-
-    inline std::size_t hash_value(bool v)
-    {
-        return static_cast<std::size_t>(v);
-    }
-
-    inline std::size_t hash_value(char v)
-    {
-        return static_cast<std::size_t>(v);
-    }
-
-    inline std::size_t hash_value(unsigned char v)
-    {
-        return static_cast<std::size_t>(v);
-    }
-
-    inline std::size_t hash_value(signed char v)
-    {
-        return static_cast<std::size_t>(v);
-    }
-
-    inline std::size_t hash_value(short v)
-    {
-        return static_cast<std::size_t>(v);
-    }
-
-    inline std::size_t hash_value(unsigned short v)
-    {
-        return static_cast<std::size_t>(v);
-    }
-
-    inline std::size_t hash_value(int v)
-    {
-        return static_cast<std::size_t>(v);
-    }
-
-    inline std::size_t hash_value(unsigned int v)
-    {
-        return static_cast<std::size_t>(v);
-    }
-
-    inline std::size_t hash_value(long v)
-    {
-        return static_cast<std::size_t>(v);
-    }
-
-    inline std::size_t hash_value(unsigned long v)
-    {
-        return static_cast<std::size_t>(v);
-    }
-
-#if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
-    inline std::size_t hash_value(wchar_t v)
-    {
-        return static_cast<std::size_t>(v);
-    }
-#endif
-
-#if !defined(BOOST_NO_LONG_LONG)
-    inline std::size_t hash_value(boost::long_long_type v)
-    {
-        return hash_detail::hash_value_signed(v);
-    }
-
-    inline std::size_t hash_value(boost::ulong_long_type v)
-    {
-        return hash_detail::hash_value_unsigned(v);
-    }
-#endif
-
-    // Implementation by Alberto Barbati and Dave Harris.
-#if !BOOST_WORKAROUND(__DMC__, <= 0x848)
-    template <class T> std::size_t hash_value(T* const& v)
-#else
-    template <class T> std::size_t hash_value(T* v)
-#endif
-    {
-        std::size_t x = static_cast<std::size_t>(
-           reinterpret_cast<std::ptrdiff_t>(v));
-
-        return x + (x >> 3);
-    }
-
-#if defined(BOOST_MSVC)
-#pragma warning(push)
-#if BOOST_MSVC <= 1400
-#pragma warning(disable:4267) // 'argument' : conversion from 'size_t' to
-                              // 'unsigned int', possible loss of data
-                              // A misguided attempt to detect 64-bit
-                              // incompatability.
-#endif
-#endif
-
-#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
-    template <class T>
-    inline void hash_combine(std::size_t& seed, T& v)
-#else
-    template <class T>
-    inline void hash_combine(std::size_t& seed, T const& v)
-#endif
-    {
-        boost::hash<T> hasher;
-        seed ^= hasher(v) + 0x9e3779b9 + (seed<<6) + (seed>>2);
-    }
-
-#if defined(BOOST_MSVC)
-#pragma warning(pop)
-#endif
-
-    template <class It>
-    inline std::size_t hash_range(It first, It last)
-    {
-        std::size_t seed = 0;
-
-        for(; first != last; ++first)
-        {
-            hash_combine(seed, *first);
-        }
-
-        return seed;
-    }
-
-    template <class It>
-    inline void hash_range(std::size_t& seed, It first, It last)
-    {
-        for(; first != last; ++first)
-        {
-            hash_combine(seed, *first);
-        }
-    }
-
-#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
-    template <class T>
-    inline std::size_t hash_range(T* first, T* last)
-    {
-        std::size_t seed = 0;
-
-        for(; first != last; ++first)
-        {
-            boost::hash<T> hasher;
-            seed ^= hasher(*first) + 0x9e3779b9 + (seed<<6) + (seed>>2);
-        }
-
-        return seed;
-    }
-
-    template <class T>
-    inline void hash_range(std::size_t& seed, T* first, T* last)
-    {
-        for(; first != last; ++first)
-        {
-            boost::hash<T> hasher;
-            seed ^= hasher(*first) + 0x9e3779b9 + (seed<<6) + (seed>>2);
-        }
-    }
-#endif
-
-#if !defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING)
-    template< class T, unsigned N >
-    inline std::size_t hash_value(const T (&x)[N])
-    {
-        return hash_range(x, x + N);
-    }
-
-    template< class T, unsigned N >
-    inline std::size_t hash_value(T (&x)[N])
-    {
-        return hash_range(x, x + N);
-    }
-#endif
-
-    template <class Ch, class A>
-    inline std::size_t hash_value(
-        std::basic_string<Ch, std::BOOST_HASH_CHAR_TRAITS<Ch>, A> const& v)
-    {
-        return hash_range(v.begin(), v.end());
-    }
-
-    inline std::size_t hash_value(float v)
-    {
-        return boost::hash_detail::float_hash_value(v);
-    }
-
-    inline std::size_t hash_value(double v)
-    {
-        return boost::hash_detail::float_hash_value(v);
-    }
-
-    inline std::size_t hash_value(long double v)
-    {
-        return boost::hash_detail::float_hash_value(v);
-    }
-
-    //
-    // boost::hash
-    //
-    
-    // Define the specializations required by the standard. The general purpose
-    // boost::hash is defined later in extensions.hpp if
-    // BOOST_HASH_NO_EXTENSIONS is not defined.
-    
-    // BOOST_HASH_SPECIALIZE - define a specialization for a type which is
-    // passed by copy.
-    //
-    // BOOST_HASH_SPECIALIZE_REF - define a specialization for a type which is
-    // passed by copy.
-    //
-    // These are undefined later.
-
-#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
-#define BOOST_HASH_SPECIALIZE(type) \
-    template <> struct hash<type> \
-         : public std::unary_function<type, std::size_t> \
-    { \
-        std::size_t operator()(type v) const \
-        { \
-            return boost::hash_value(v); \
-        } \
-    };
-
-#define BOOST_HASH_SPECIALIZE_REF(type) \
-    template <> struct hash<type> \
-         : public std::unary_function<type, std::size_t> \
-    { \
-        std::size_t operator()(type const& v) const \
-        { \
-            return boost::hash_value(v); \
-        } \
-    };
-#else
-#define BOOST_HASH_SPECIALIZE(type) \
-    template <> struct hash<type> \
-         : public std::unary_function<type, std::size_t> \
-    { \
-        std::size_t operator()(type v) const \
-        { \
-            return boost::hash_value(v); \
-        } \
-    }; \
-    \
-    template <> struct hash<const type> \
-         : public std::unary_function<const type, std::size_t> \
-    { \
-        std::size_t operator()(const type v) const \
-        { \
-            return boost::hash_value(v); \
-        } \
-    };
-
-#define BOOST_HASH_SPECIALIZE_REF(type) \
-    template <> struct hash<type> \
-         : public std::unary_function<type, std::size_t> \
-    { \
-        std::size_t operator()(type const& v) const \
-        { \
-            return boost::hash_value(v); \
-        } \
-    }; \
-    \
-    template <> struct hash<const type> \
-         : public std::unary_function<const type, std::size_t> \
-    { \
-        std::size_t operator()(type const& v) const \
-        { \
-            return boost::hash_value(v); \
-        } \
-    };
-#endif
-
-    BOOST_HASH_SPECIALIZE(bool)
-    BOOST_HASH_SPECIALIZE(char)
-    BOOST_HASH_SPECIALIZE(signed char)
-    BOOST_HASH_SPECIALIZE(unsigned char)
-#if !defined(BOOST_NO_INTRINSIC_WCHAR_T)
-    BOOST_HASH_SPECIALIZE(wchar_t)
-#endif
-    BOOST_HASH_SPECIALIZE(short)
-    BOOST_HASH_SPECIALIZE(unsigned short)
-    BOOST_HASH_SPECIALIZE(int)
-    BOOST_HASH_SPECIALIZE(unsigned int)
-    BOOST_HASH_SPECIALIZE(long)
-    BOOST_HASH_SPECIALIZE(unsigned long)
-
-    BOOST_HASH_SPECIALIZE(float)
-    BOOST_HASH_SPECIALIZE(double)
-    BOOST_HASH_SPECIALIZE(long double)
-
-    BOOST_HASH_SPECIALIZE_REF(std::string)
-#if !defined(BOOST_NO_STD_WSTRING)
-    BOOST_HASH_SPECIALIZE_REF(std::wstring)
-#endif
-
-#if !defined(BOOST_NO_LONG_LONG)
-    BOOST_HASH_SPECIALIZE(boost::long_long_type)
-    BOOST_HASH_SPECIALIZE(boost::ulong_long_type)
-#endif
-
-#undef BOOST_HASH_SPECIALIZE
-#undef BOOST_HASH_SPECIALIZE_REF
-
-// Specializing boost::hash for pointers.
-
-#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
-
-    template <class T>
-    struct hash<T*>
-        : public std::unary_function<T*, std::size_t>
-    {
-        std::size_t operator()(T* v) const
-        {
-#if !BOOST_WORKAROUND(__SUNPRO_CC, <= 0x590)
-            return boost::hash_value(v);
-#else
-            std::size_t x = static_cast<std::size_t>(
-                reinterpret_cast<std::ptrdiff_t>(v));
-
-            return x + (x >> 3);
-#endif
-        }
-    };
-
-#else
-
-    // For compilers without partial specialization, we define a
-    // boost::hash for all remaining types. But hash_impl is only defined
-    // for pointers in 'extensions.hpp' - so when BOOST_HASH_NO_EXTENSIONS
-    // is defined there will still be a compile error for types not supported
-    // in the standard.
-
-    namespace hash_detail
-    {
-        template <bool IsPointer>
-        struct hash_impl;
-
-        template <>
-        struct hash_impl<true>
-        {
-            template <class T>
-            struct inner
-                : public std::unary_function<T, std::size_t>
-            {
-                std::size_t operator()(T val) const
-                {
-#if !BOOST_WORKAROUND(__SUNPRO_CC, <= 590)
-                    return boost::hash_value(val);
-#else
-                    std::size_t x = static_cast<std::size_t>(
-                        reinterpret_cast<std::ptrdiff_t>(val));
-
-                    return x + (x >> 3);
-#endif
-                }
-            };
-        };
-    }
-
-    template <class T> struct hash
-        : public boost::hash_detail::hash_impl<boost::is_pointer<T>::value>
-            ::BOOST_NESTED_TEMPLATE inner<T>
-    {
-    };
-
-#endif
-}
-
-#undef BOOST_HASH_CHAR_TRAITS
-
-#endif // BOOST_FUNCTIONAL_HASH_HASH_HPP
-
-// Include this outside of the include guards in case the file is included
-// twice - once with BOOST_HASH_NO_EXTENSIONS defined, and then with it
-// undefined.
-
-#if !defined(BOOST_HASH_NO_EXTENSIONS) \
-    && !defined(BOOST_FUNCTIONAL_HASH_EXTENSIONS_HPP)
-#include <boost/functional/hash/extensions.hpp>
-#endif
+#include <boost/container_hash/hash.hpp>

include/boost/functional/hash/hash_fwd.hpp

@@ -3,38 +3,4 @@
 // 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)
 
-//  Based on Peter Dimov's proposal
-//  http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1756.pdf
-//  issue 6.18. 
-
-#if !defined(BOOST_FUNCTIONAL_HASH_FWD_HPP)
-#define BOOST_FUNCTIONAL_HASH_FWD_HPP
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-#include <boost/config.hpp>
-#include <cstddef>
-#include <boost/detail/workaround.hpp>
-
-namespace boost
-{
-    template <class T> struct hash;
-
-#if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
-    template <class T> void hash_combine(std::size_t& seed, T& v);
-#else
-    template <class T> void hash_combine(std::size_t& seed, T const& v);
-#endif
-
-    template <class It> std::size_t hash_range(It, It);
-    template <class It> void hash_range(std::size_t&, It, It);
-
-#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
-    template <class T> inline std::size_t hash_range(T*, T*);
-    template <class T> inline void hash_range(std::size_t&, T*, T*);
-#endif
-}
-
-#endif
+#include <boost/container_hash/hash_fwd.hpp>

include/boost/functional/hash_fwd.hpp

@@ -3,5 +3,4 @@
 // 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/functional/hash/hash_fwd.hpp>
-
+#include <boost/container_hash/hash_fwd.hpp>

index.html

@@ -7,10 +7,10 @@ file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
 <html>
 <head>
-    <meta http-equiv="refresh" content="0; URL=../../doc/html/hash.html">
+    <meta http-equiv="refresh" content="0; URL=doc/html/hash.html">
 </head>
 <body>
 Automatic redirection failed, please go to
-<a href="../../doc/html/hash.html">../../doc/html/hash.html</a>
+<a href="doc/html/hash.html">doc/html/hash.html</a>
 </body>
 </html>

meta/explicit-failures-markup.xml

@@ -0,0 +1,96 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright 2018 Daniel James
+ 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)
+-->
+<explicit-failures-markup>
+    <!-- container_hash -->
+    <library name="container_hash">
+        <mark-expected-failures>
+            <test name="hash_value_array_test"/>
+            <toolset name="msvc-6.5*"/>
+            <toolset name="msvc-7.0*"/>
+            <note author="Daniel James">
+              hash_value is not overloaded for arrays for older versions
+              of Visual C++. There is a work around so that
+              boost::hash&lt;T[N]&gt;, boost::hash_combine and boost::hash_range
+              work.
+            </note>
+        </mark-expected-failures>
+
+        <mark-expected-failures>
+            <test name="hash_function_pointer_test"/>
+            <toolset name="msvc-6.5*"/>
+            <toolset name="msvc-7.0*"/>
+            <note refid="2" author="Daniel James"/>
+        </mark-expected-failures>
+
+        <mark-expected-failures>
+            <test name="hash_function_pointer_test"/>
+            <toolset name="sun-5.7"/>
+            <toolset name="sun-5.8"/>
+            <toolset name="sun-5.9"/>
+            <note author="Daniel James">
+                On these compilers the wrong overload of hash_value is called
+                when the argument is a hash function pointer. So calling
+                hash_value doesn't work but boost::hash does work (and it's
+                recommended that user never call hash_value directly so this
+                shouldn't be a problem).
+            </note>
+        </mark-expected-failures>
+
+        <mark-expected-failures>
+            <test name="hash_long_double_test"/>
+            <toolset name="gcc-3.4.3_sunos"/>
+            <toolset name="*pa_risc"/>
+            <note author="Daniel James">
+                This platform has poor support for <code>long double</code> so
+                the hash function perform poorly for values out of the range
+                of <code>double</code> or if they differ at a greater precision
+                that <code>double</code> is capable of representing.
+            </note>
+        </mark-expected-failures>
+
+        <mark-expected-failures>
+            <test name="point" />
+            <test name="books" />
+            <toolset name="msvc-6.5*"/>
+            <toolset name="msvc-7.0*"/>
+            <note author="Daniel James">
+                These examples only work on compilers with support for ADL.
+                It is possible to work around this, but I wanted to keep the
+                example code as clean as possible.
+            </note>
+        </mark-expected-failures>
+
+        <mark-expected-failures>
+            <test name="point" />
+            <toolset name="borland-*"/>
+            <note author="Daniel James">
+                It appears that Borland doesn't find friend functions defined
+                in a class by ADL. This is easily fixed but this example is
+                meant to show the typical way of customising boost::hash, not
+                the portable way.
+            </note>
+        </mark-expected-failures>
+
+        <mark-expected-failures>
+            <test name="hash_global_namespace_test" />
+            <toolset name="borland-*"/>
+            <note author="Daniel James">
+                The test demonstrates a Borland bug - functions that aren't
+                in a namespace don't appear to be found by ADL.
+            </note>
+        </mark-expected-failures>
+
+        <mark-expected-failures>
+            <test name="container_fwd_gcc_debug"/>
+            <toolset name="darwin-4.2"/>
+            <note author="Daniel James">
+              Debug containers aren't supported on Apple's version of gcc 4.2.
+            </note>
+        </mark-expected-failures>
+    </library>
+</explicit-failures-markup>

meta/libraries.json

@@ -0,0 +1,21 @@
+[
+    {
+        "key": "container_hash",
+        "boost-version": "1.33.0",
+        "name": "Container Hash",
+        "authors": [
+            "Daniel James"
+        ],
+        "maintainers": [
+            "Daniel James <dnljms -at- gmail.com>"
+        ],
+        "description": "An STL-compatible hash function object that can be extended to hash user defined types.",
+        "std": [
+            "tr1"
+        ],
+        "category": [
+            "Function-objects"
+        ],
+        "cxxstd": "03"
+    }
+]

test/CMakeLists.txt

@@ -0,0 +1,11 @@
+# Copyright 2018, 2019, 2021 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(BoostTestJamfile OPTIONAL RESULT_VARIABLE HAVE_BOOST_TEST)
+
+if(HAVE_BOOST_TEST)
+
+boost_test_jamfile(FILE Jamfile.v2 LINK_LIBRARIES Boost::container_hash Boost::core Boost::utility)
+
+endif()

test/Jamfile.v2

@@ -1,71 +1,83 @@
-
-# Copyright 2005-2008 Daniel James.
-# Distributed under the Boost Software License, Version 1.0. (See accompanying
-# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+# Copyright 2005-2012 Daniel James.
+# Copyright 2022 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# https://www.boost.org/LICENSE_1_0.txt
 
 import testing ;
 
+local gcc-flags = -Wunused-parameter -Wconversion -Wsign-conversion -Wfloat-equal -Wshadow -Wno-variadic-macros ;
+local clang-flags = $(gcc-flags) -Wno-c99-extensions ;
+
 project hash-tests
     : requirements
-        <define>BOOST_HASH_NO_IMPLICIT_CASTS
-        <warnings>all
+        <warnings>pedantic
         <toolset>intel:<warnings>on
-        <toolset>intel:<cxxflags>-strict-ansi
-        <toolset>gcc:<cxxflags>"-pedantic -Wstrict-aliasing -fstrict-aliasing -Wextra -Wsign-promo -Wunused-parameter"
-        <toolset>darwin:<cxxflags>"-pedantic -Wstrict-aliasing -fstrict-aliasing -Wextra -Wsign-promo -Wunused-parameter"
+        <toolset>gcc:<cxxflags>$(gcc-flags)
+        <toolset>darwin:<cxxflags>$(gcc-flags)
+        <toolset>clang:<cxxflags>$(clang-flags)
         <toolset>msvc:<warnings-as-errors>on
-        #<toolset>gcc:<warnings-as-errors>on
-        #<toolset>darwin:<warnings-as-errors>on
+        <toolset>gcc:<warnings-as-errors>on
+        <toolset>clang:<warnings-as-errors>on
     ;
 
-test-suite functional/hash
-    :
-        [ run hash_fwd_test_1.cpp ]
-        [ run hash_fwd_test_2.cpp ]
-        [ run hash_number_test.cpp ]
-        [ run hash_pointer_test.cpp ]
-        [ run hash_function_pointer_test.cpp ]
-        [ run hash_float_test.cpp : : : <test-info>always_show_run_output ]
-        [ run hash_long_double_test.cpp : : : <test-info>always_show_run_output ]
-        [ run hash_string_test.cpp ]
-        [ run hash_range_test.cpp ]
-        [ run hash_custom_test.cpp ]
-        [ run hash_global_namespace_test.cpp ]
-        [ run hash_friend_test.cpp ]
-        [ run hash_built_in_array_test.cpp ]
-        [ run hash_value_array_test.cpp ]
-        [ run hash_vector_test.cpp ]
-        [ run hash_list_test.cpp ]
-        [ run hash_deque_test.cpp ]
-        [ run hash_set_test.cpp ]
-        [ run hash_map_test.cpp ]
-        [ run hash_complex_test.cpp ]
-        [ run link_test.cpp link_test_2.cpp ]
-        [ run link_ext_test.cpp link_no_ext_test.cpp ]
-        [ run extensions_hpp_test.cpp ]
-        [ run container_fwd_test.cpp ]
-        [ run container_fwd_test.cpp : :
-            :   <toolset>gcc:<define>_GLIBCXX_DEBUG
-                <toolset>darwin:<define>_GLIBCXX_DEBUG
-            :   container_fwd_gcc_debug ]
-        [ run container_no_fwd_test.cpp ]
-        [ compile-fail hash_no_ext_fail_test.cpp ]
-        [ compile-fail namespace_fail_test.cpp ]
-        [ compile-fail implicit_fail_test.cpp ]
-        [ compile-fail shared_ptr_fail_test.cpp ]
-        [ run hash_no_ext_macro_1.cpp ]
-        [ run hash_no_ext_macro_2.cpp ]
-    ;
-
-test-suite functional/hash_no_ext
-    :
-        [ run hash_number_test.cpp : : : <define>BOOST_HASH_NO_EXTENSIONS : no_ext_number_test ]
-        [ run hash_pointer_test.cpp : : : <define>BOOST_HASH_NO_EXTENSIONS : no_ext_pointer_test ]
-        [ run hash_function_pointer_test.cpp : : : <define>BOOST_HASH_NO_EXTENSIONS : no_ext_function_pointer_test ]
-        [ run hash_float_test.cpp : : : <define>BOOST_HASH_NO_EXTENSIONS : no_ext_float_test ]
-        [ run hash_long_double_test.cpp : : : <define>BOOST_HASH_NO_EXTENSIONS : no_ext_long_double_test ]
-        [ run hash_string_test.cpp : : : <define>BOOST_HASH_NO_EXTENSIONS : no_ext_string_test ]
-        [ run link_test.cpp link_test_2.cpp : : : <define>BOOST_HASH_NO_EXTENSIONS : no_ext_link_test ]
-    ;
+run hash_info.cpp : : : <test-info>always_show_run_output ;
+compile check_float_funcs.cpp ;
+run hash_fwd_test_1.cpp ;
+run hash_fwd_test_2.cpp ;
+run hash_number_test.cpp ;
+run hash_enum_test.cpp ;
+run hash_pointer_test.cpp ;
+run hash_function_pointer_test.cpp ;
+run hash_float_test.cpp ;
+run hash_long_double_test.cpp ;
+run hash_string_test.cpp ;
+run hash_range_test.cpp ;
+run hash_custom_test.cpp ;
+run hash_global_namespace_test.cpp ;
+run hash_friend_test.cpp ;
+run hash_built_in_array_test.cpp ;
+run hash_value_array_test.cpp ;
+run hash_vector_test.cpp ;
+run hash_list_test.cpp ;
+run hash_deque_test.cpp ;
+run hash_set_test.cpp ;
+run hash_map_test.cpp ;
+run hash_complex_test.cpp ;
+run hash_optional_test.cpp ;
+run hash_variant_test.cpp ;
+run hash_type_index_test.cpp ;
+run hash_system_error_test.cpp ;
+run hash_std_array_test.cpp ;
+run hash_std_tuple_test.cpp ;
+run hash_std_smart_ptr_test.cpp ;
+run link_test.cpp link_test_2.cpp ;
+run link_ext_test.cpp link_no_ext_test.cpp ;
+run extensions_hpp_test.cpp ;
+compile-fail namespace_fail_test.cpp ;
+run implicit_test.cpp ;
+run hash_no_ext_macro_1.cpp ;
+run hash_no_ext_macro_2.cpp ;
 
 build-project ../examples ;
+
+run hash_reference_values.cpp ;
+
+run detail_is_range_test.cpp ;
+run detail_is_contiguous_range_test.cpp ;
+run detail_is_unordered_range_test.cpp ;
+
+run hash_forward_list_test.cpp ;
+
+run quick.cpp ;
+
+run hash_number_test2.cpp ;
+run hash_integral_test.cpp ;
+run hash_string_test2.cpp ;
+
+# for gcc-4.8
+local fs-path-req = "-<toolset>gcc:<cxxflags>-Wshadow" "-<toolset>gcc:<cxxflags>-Wconversion" ;
+
+run hash_fs_path_test.cpp /boost//filesystem/<warnings>off : : : $(fs-path-req) <toolset>msvc-14.0,<cxxstd>latest:<build>no ;
+run detail_is_range_test2.cpp : : : $(fs-path-req) ;
+
+run hash_container_test.cpp ;

test/check_float_funcs.cpp

@@ -0,0 +1,63 @@
+
+// Copyright 2012 Daniel James.
+// 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)
+
+#if defined(__GNUC__)
+// in type_traits/is_complete.hpp:47
+#pragma GCC diagnostic ignored "-Wconversion"
+#endif
+
+#include <boost/static_assert.hpp>
+#include <boost/type_traits/is_same.hpp>
+#include <boost/type_traits/is_convertible.hpp>
+#include <cmath>
+
+namespace test
+{
+    template <class T1>
+    struct check_return_type
+    {
+        template <class T2>
+        static void equals(T2)
+        {
+            BOOST_STATIC_ASSERT((boost::is_same<T1, T2>::value));
+        }
+
+        template <class T2>
+        static void equals_ref(T2&)
+        {
+            BOOST_STATIC_ASSERT((boost::is_same<T1, T2>::value));
+        }
+
+        template <class T2>
+        static void convertible(T2)
+        {
+            BOOST_STATIC_ASSERT((boost::is_convertible<T2, T1>::value));
+        }
+    };
+}
+
+int main() {
+    float f = 0;
+    double d = 0;
+    long double l = 0;
+
+    test::check_return_type<float>::equals(std::ldexp(f, 0));
+    test::check_return_type<double>::equals(std::ldexp(d, 0));
+    test::check_return_type<long double>::equals(std::ldexp(l, 0));
+
+    int dummy = 0;
+
+    test::check_return_type<float>::equals(std::frexp(f, &dummy));
+    test::check_return_type<double>::equals(std::frexp(d, &dummy));
+    test::check_return_type<long double>::equals(std::frexp(l, &dummy));
+
+#if BOOST_HASH_USE_FPCLASSIFY
+
+    int (*fpc1)(float) = std::fpclassify;
+    int (*fpc2)(double) = std::fpclassify;
+    int (*fpc3)(long double) = std::fpclassify;
+
+#endif
+}

test/cmake_install_test/CMakeLists.txt

@@ -0,0 +1,17 @@
+# Copyright 2018, 2019, 2021 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
+
+cmake_minimum_required(VERSION 3.5...3.20)
+
+project(cmake_install_test LANGUAGES CXX)
+
+find_package(boost_container_hash REQUIRED)
+
+add_executable(quick ../quick.cpp)
+target_link_libraries(quick Boost::container_hash)
+
+enable_testing()
+add_test(quick quick)
+
+add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -C $<CONFIG>)

test/cmake_subdir_test/CMakeLists.txt

@@ -0,0 +1,21 @@
+# Copyright 2018, 2019, 2021 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
+
+cmake_minimum_required(VERSION 3.5...3.20)
+
+project(cmake_subdir_test LANGUAGES CXX)
+
+add_subdirectory(../.. boostorg/container_hash)
+
+add_subdirectory(../../../config boostorg/config)
+add_subdirectory(../../../type_traits boostorg/type_traits)
+add_subdirectory(../../../static_assert boostorg/static_assert)
+
+add_executable(quick ../quick.cpp)
+target_link_libraries(quick Boost::container_hash)
+
+enable_testing()
+add_test(quick quick)
+
+add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -C $<CONFIG>)

test/compile_time.hpp

@@ -5,12 +5,16 @@
 
 #include <boost/config.hpp>
 #include <boost/static_assert.hpp>
-#include <boost/type_traits/is_base_and_derived.hpp>
+#include <boost/type_traits/is_same.hpp>
 
 template <class T>
 void compile_time_tests(T*)
 {
-    BOOST_STATIC_ASSERT((boost::is_base_and_derived<
-        std::unary_function<T, std::size_t>, HASH_NAMESPACE::hash<T> >::value));
+    BOOST_STATIC_ASSERT((boost::is_same<T,
+        typename BOOST_HASH_TEST_NAMESPACE::hash<T>::argument_type
+    >::value));
+    BOOST_STATIC_ASSERT((boost::is_same<std::size_t,
+        typename BOOST_HASH_TEST_NAMESPACE::hash<T>::result_type
+    >::value));
 }
 

test/config.hpp

@@ -3,13 +3,13 @@
 // 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)
 
-#if defined(TEST_STD)
-#  define TEST_STD_INCLUDES
-#  define HASH_NAMESPACE std
+#if defined(BOOST_HASH_TEST_STD)
+#  define BOOST_HASH_TEST_STD_INCLUDES
+#  define BOOST_HASH_TEST_NAMESPACE std
 #else
-#  define HASH_NAMESPACE boost
+#  define BOOST_HASH_TEST_NAMESPACE boost
 #  if !defined(BOOST_HASH_NO_EXTENSIONS)
-#    define TEST_EXTENSIONS
+#    define BOOST_HASH_TEST_EXTENSIONS
 #  endif
 #endif
 
@@ -18,4 +18,8 @@
 // before doing anything else.
 #pragma warning(disable:4201)   // nonstandard extension used :
                                 // nameless struct/union
+
 #endif
+
+#define HASH_TEST_CAT(x, y) HASH_TEST_CAT2(x, y)
+#define HASH_TEST_CAT2(x, y) x##y

test/container_fwd_test.cpp

@@ -1,114 +0,0 @@
-
-// Copyright 2005-2009 Daniel James.
-// 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 "./config.hpp"
-
-#include <boost/functional/detail/container_fwd.hpp>
-
-#if BOOST_WORKAROUND(__GNUC__, < 3) && \
-    !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
-template <class charT, class Allocator>
-static void test(
-    std::basic_string<charT, std::string_char_traits<charT>, Allocator> const&)
-{
-}
-#else
-template <class charT, class Allocator>
-static void test(
-    std::basic_string<charT, std::char_traits<charT>, Allocator> const&)
-{
-}
-#endif
-    
-template <class T, class Allocator>
-static void test(std::deque<T, Allocator> const&)
-{
-}
-
-template <class T, class Allocator>
-static void test(std::list<T, Allocator> const&)
-{
-}
-
-template <class T, class Allocator>
-static void test(std::vector<T, Allocator> const&)
-{
-}
-
-template <class Key, class T, class Compare, class Allocator>
-static void test(std::map<Key, T, Compare, Allocator> const&)
-{
-}
-
-template <class Key, class T, class Compare, class Allocator>
-static void test(std::multimap<Key, T, Compare, Allocator> const&)
-{
-}
-
-template <class Key, class Compare, class Allocator>
-static void test(std::set<Key, Compare, Allocator> const&)
-{
-}
-
-template <class Key, class Compare, class Allocator>
-static void test(std::multiset<Key, Compare, Allocator> const&)
-{
-}
-
-template <std::size_t N>
-static void test(std::bitset<N> const&)
-{
-}
-
-template <class T>
-static void test(std::complex<T> const&)
-{
-}
-
-template <class X, class Y>
-static void test(std::pair<X, Y> const&)
-{
-}
-
-#include <deque>
-#include <list>
-#include <vector>
-#include <map>
-#include <set>
-#include <bitset>
-#include <string>
-#include <complex>
-#include <utility>
-
-int main()
-{
-    std::deque<int> x1;
-    std::list<std::string> x2;
-    std::vector<float> x3;
-    std::vector<bool> x4;
-    std::map<int, int> x5;
-    std::multimap<float, int*> x6;
-    std::set<std::string> x7;
-    std::multiset<std::vector<int> > x8;
-    std::bitset<10> x9;
-    std::string x10;
-    std::complex<double> x11;
-    std::pair<std::list<int>, char***> x12;
-
-    test(x1);
-    test(x2);
-    test(x3);
-    test(x4);
-    test(x5);
-    test(x6);
-    test(x7);
-    test(x8);
-    test(x9);
-    test(x10);
-    test(x11);
-    test(x12);
-
-    return 0;
-}

test/container_no_fwd_test.cpp

@@ -1,14 +0,0 @@
-
-// Copyright 2010 Daniel James.
-// 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_DETAIL_NO_CONTAINER_FWD
-
-#include <boost/detail/container_fwd.hpp>
-
-int main()
-{
-    std::set<int> x;
-    std::vector<std::string> y;
-}

test/detail_is_contiguous_range_test.cpp

@@ -0,0 +1,101 @@
+// Copyright 2017, 2018 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/container_hash/detail/is_contiguous_range.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <boost/config.hpp>
+#include <string>
+#include <vector>
+#include <list>
+#include <deque>
+#include <set>
+#include <map>
+#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
+# include <array>
+#endif
+#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
+# include <forward_list>
+#endif
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)
+# include <unordered_set>
+#endif
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP)
+# include <unordered_map>
+#endif
+
+struct X
+{
+};
+
+int main()
+{
+    using boost::hash_detail::is_contiguous_range;
+
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range<void>));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range<void const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range<int>));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range<int const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range<X>));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range<X const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range<int[2]>));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range<int const[2]>));
+
+    BOOST_TEST_TRAIT_TRUE((is_contiguous_range<std::string>));
+    BOOST_TEST_TRAIT_TRUE((is_contiguous_range<std::string const>));
+
+    BOOST_TEST_TRAIT_TRUE((is_contiguous_range<std::wstring>));
+    BOOST_TEST_TRAIT_TRUE((is_contiguous_range<std::wstring const>));
+
+// std::vector doesn't have data() in C++03
+#if !defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_SFINAE_EXPR) && !BOOST_WORKAROUND(BOOST_GCC, < 40700)
+    BOOST_TEST_TRAIT_TRUE((is_contiguous_range< std::vector<X> >));
+    BOOST_TEST_TRAIT_TRUE((is_contiguous_range< std::vector<X> const >));
+#endif
+
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::deque<X> >));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::deque<X> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::set<int> >));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::set<int> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::multiset<int> >));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::multiset<int> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::map<int, X> >));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::map<int, X> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::multimap<int, X> >));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::multimap<int, X> const >));
+
+#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
+    BOOST_TEST_TRAIT_TRUE((is_contiguous_range< std::array<X, 2> >));
+    BOOST_TEST_TRAIT_TRUE((is_contiguous_range< std::array<X, 2> const >));
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::forward_list<X> >));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::forward_list<X> const >));
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::unordered_set<int> >));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::unordered_set<int> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::unordered_multiset<int> >));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::unordered_multiset<int> const >));
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP)
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::unordered_map<int, X> >));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::unordered_map<int, X> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::unordered_multimap<int, X> >));
+    BOOST_TEST_TRAIT_FALSE((is_contiguous_range< std::unordered_multimap<int, X> const >));
+#endif
+
+    return boost::report_errors();
+}

test/detail_is_range_test.cpp

@@ -0,0 +1,98 @@
+// Copyright 2017 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/container_hash/detail/is_range.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <boost/config.hpp>
+#include <string>
+#include <vector>
+#include <list>
+#include <deque>
+#include <set>
+#include <map>
+#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
+# include <array>
+#endif
+#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
+# include <forward_list>
+#endif
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)
+# include <unordered_set>
+#endif
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP)
+# include <unordered_map>
+#endif
+
+struct X
+{
+};
+
+int main()
+{
+    using boost::hash_detail::is_range;
+
+    BOOST_TEST_TRAIT_FALSE((is_range<void>));
+    BOOST_TEST_TRAIT_FALSE((is_range<void const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_range<int>));
+    BOOST_TEST_TRAIT_FALSE((is_range<int const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_range<X>));
+    BOOST_TEST_TRAIT_FALSE((is_range<X const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_range<int[2]>));
+    BOOST_TEST_TRAIT_FALSE((is_range<int const[2]>));
+
+    BOOST_TEST_TRAIT_TRUE((is_range<std::string>));
+    BOOST_TEST_TRAIT_TRUE((is_range<std::string const>));
+
+    BOOST_TEST_TRAIT_TRUE((is_range<std::wstring>));
+    BOOST_TEST_TRAIT_TRUE((is_range<std::wstring const>));
+
+    BOOST_TEST_TRAIT_TRUE((is_range< std::vector<X> >));
+    BOOST_TEST_TRAIT_TRUE((is_range< std::vector<X> const >));
+
+    BOOST_TEST_TRAIT_TRUE((is_range< std::deque<X> >));
+    BOOST_TEST_TRAIT_TRUE((is_range< std::deque<X> const >));
+
+    BOOST_TEST_TRAIT_TRUE((is_range< std::set<int> >));
+    BOOST_TEST_TRAIT_TRUE((is_range< std::set<int> const >));
+
+    BOOST_TEST_TRAIT_TRUE((is_range< std::multiset<int> >));
+    BOOST_TEST_TRAIT_TRUE((is_range< std::multiset<int> const >));
+
+    BOOST_TEST_TRAIT_TRUE((is_range< std::map<int, X> >));
+    BOOST_TEST_TRAIT_TRUE((is_range< std::map<int, X> const >));
+
+    BOOST_TEST_TRAIT_TRUE((is_range< std::multimap<int, X> >));
+    BOOST_TEST_TRAIT_TRUE((is_range< std::multimap<int, X> const >));
+
+#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
+    BOOST_TEST_TRAIT_TRUE((is_range< std::array<X, 2> >));
+    BOOST_TEST_TRAIT_TRUE((is_range< std::array<X, 2> const >));
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
+    BOOST_TEST_TRAIT_TRUE((is_range< std::forward_list<X> >));
+    BOOST_TEST_TRAIT_TRUE((is_range< std::forward_list<X> const >));
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)
+    BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_set<int> >));
+    BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_set<int> const >));
+
+    BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_multiset<int> >));
+    BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_multiset<int> const >));
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP)
+    BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_map<int, X> >));
+    BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_map<int, X> const >));
+
+    BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_multimap<int, X> >));
+    BOOST_TEST_TRAIT_TRUE((is_range< std::unordered_multimap<int, X> const >));
+#endif
+
+    return boost::report_errors();
+}

test/detail_is_range_test2.cpp

@@ -0,0 +1,37 @@
+// Copyright 2022 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined(_MSC_VER)
+# pragma warning(disable: 4714) // forceinline not inlined
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+# pragma GCC diagnostic ignored "-Wsign-conversion"
+#endif
+
+#include <boost/container_hash/detail/is_range.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <boost/config.hpp>
+#include <boost/filesystem/path.hpp>
+
+#if !defined(BOOST_NO_CXX17_HDR_FILESYSTEM) && !defined(__MINGW32__)
+# include <filesystem>
+#endif
+
+int main()
+{
+    using boost::hash_detail::is_range;
+
+    BOOST_TEST_TRAIT_FALSE((is_range< boost::filesystem::path >));
+    BOOST_TEST_TRAIT_FALSE((is_range< boost::filesystem::path const >));
+
+#if !defined(BOOST_NO_CXX17_HDR_FILESYSTEM) && !defined(__MINGW32__)
+
+    BOOST_TEST_TRAIT_FALSE((is_range< std::filesystem::path >));
+    BOOST_TEST_TRAIT_FALSE((is_range< std::filesystem::path const >));
+
+#endif
+
+    return boost::report_errors();
+}

test/detail_is_unordered_range_test.cpp

@@ -0,0 +1,98 @@
+// Copyright 2017 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/container_hash/detail/is_unordered_range.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <boost/config.hpp>
+#include <string>
+#include <vector>
+#include <list>
+#include <deque>
+#include <set>
+#include <map>
+#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
+# include <array>
+#endif
+#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
+# include <forward_list>
+#endif
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)
+# include <unordered_set>
+#endif
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP)
+# include <unordered_map>
+#endif
+
+struct X
+{
+};
+
+int main()
+{
+    using boost::hash_detail::is_unordered_range;
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<void>));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<void const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<int>));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<int const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<X>));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<X const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<int[2]>));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<int const[2]>));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<std::string>));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<std::string const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<std::wstring>));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<std::wstring const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::vector<X> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::vector<X> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::deque<X> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::deque<X> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::set<int> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::set<int> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::multiset<int> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::multiset<int> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::map<int, X> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::map<int, X> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::multimap<int, X> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::multimap<int, X> const >));
+
+#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::array<X, 2> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::array<X, 2> const >));
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::forward_list<X> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::forward_list<X> const >));
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_set<int> >));
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_set<int> const >));
+
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_multiset<int> >));
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_multiset<int> const >));
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP)
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_map<int, X> >));
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_map<int, X> const >));
+
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_multimap<int, X> >));
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_multimap<int, X> const >));
+#endif
+
+    return boost::report_errors();
+}

test/extensions_hpp_test.cpp

@@ -3,14 +3,14 @@
 // 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)
 
-// Check that boost/functional/hash/extensions.hpp works okay.
+// Check that boost/container_hash/extensions.hpp works okay.
 //
-// It probably should be in boost/functional/hash/detail, but since it isn't it
+// It probably should be in boost/container_hash/detail, but since it isn't it
 // should work.
 
 #include "./config.hpp"
 
-#include <boost/functional/hash/extensions.hpp>
+#include <boost/container_hash/extensions.hpp>
 
 int main() {
     int x[2] = { 2, 3 };

test/hash_built_in_array_test.cpp

@@ -5,17 +5,17 @@
 
 #include "./config.hpp"
 
-#ifdef TEST_EXTENSIONS
-#  ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_EXTENSIONS
+#  ifdef BOOST_HASH_TEST_STD_INCLUDES
 #    include <functional>
 #  else
-#    include <boost/functional/hash.hpp>
+#    include <boost/container_hash/hash.hpp>
 #  endif
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
 
 void array_int_test()
 {
@@ -27,47 +27,47 @@ void array_int_test()
         8, -12, 23, 65, 45,
         -1, 93, -54, 987, 3
     };
-    HASH_NAMESPACE::hash<int[25]> hasher1;
+    BOOST_HASH_TEST_NAMESPACE::hash<int[25]> hasher1;
 
     const int length2 = 1;
     int array2[1] = {3};
-    HASH_NAMESPACE::hash<int[1]> hasher2;
+    BOOST_HASH_TEST_NAMESPACE::hash<int[1]> hasher2;
 
     const int length3 = 2;
     int array3[2] = {2, 3};
-    HASH_NAMESPACE::hash<int[2]> hasher3;
+    BOOST_HASH_TEST_NAMESPACE::hash<int[2]> hasher3;
 
     BOOST_TEST(hasher1(array1)
-            == HASH_NAMESPACE::hash_range(array1, array1 + length1));
+            == BOOST_HASH_TEST_NAMESPACE::hash_range(array1, array1 + length1));
     BOOST_TEST(hasher2(array2)
-            == HASH_NAMESPACE::hash_range(array2, array2 + length2));
+            == BOOST_HASH_TEST_NAMESPACE::hash_range(array2, array2 + length2));
     BOOST_TEST(hasher3(array3)
-            == HASH_NAMESPACE::hash_range(array3, array3 + length3));
+            == BOOST_HASH_TEST_NAMESPACE::hash_range(array3, array3 + length3));
 }
 
 void two_dimensional_array_test()
 {
     int array[3][2] = {{-5, 6}, {7, -3}, {26, 1}};
-    HASH_NAMESPACE::hash<int[3][2]> hasher;
+    BOOST_HASH_TEST_NAMESPACE::hash<int[3][2]> hasher;
 
     std::size_t seed1 = 0;
     for(int i = 0; i < 3; ++i)
     {
         std::size_t seed2 = 0;
         for(int j = 0; j < 2; ++j)
-            HASH_NAMESPACE::hash_combine(seed2, array[i][j]);
-        HASH_NAMESPACE::hash_combine(seed1, seed2);
+            BOOST_HASH_TEST_NAMESPACE::hash_combine(seed2, array[i][j]);
+        BOOST_HASH_TEST_NAMESPACE::hash_combine(seed1, seed2);
     }
 
     BOOST_TEST(hasher(array) == seed1);
-    BOOST_TEST(hasher(array) == HASH_NAMESPACE::hash_range(array, array + 3));
+    BOOST_TEST(hasher(array) == BOOST_HASH_TEST_NAMESPACE::hash_range(array, array + 3));
 }
 
-#endif // TEST_EXTENSIONS
+#endif // BOOST_HASH_TEST_EXTENSIONS
 
 int main()
 {
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
     array_int_test();
     two_dimensional_array_test();
 #endif

test/hash_complex_test.cpp

@@ -5,19 +5,19 @@
 
 #include "./config.hpp"
 
-#if !defined(TEST_EXTENSIONS)
+#if !defined(BOOST_HASH_TEST_EXTENSIONS)
 
 int main() {}
 
 #else
 
-#ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_STD_INCLUDES
 #  include <functional>
 #else
-#  include <boost/functional/hash.hpp>
+#  include <boost/container_hash/hash.hpp>
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 
 #if defined(BOOST_MSVC)
 #pragma warning(disable:4244)   // conversion from 'unsigned long' to
@@ -29,24 +29,30 @@ int main() {}
                                 // 'const std::complex<float>::_Ty'
 #pragma warning(disable:4309)   // truncation of constant value
 #pragma warning(disable:4512)   // assignment operator could not be generated
+#pragma warning(disable:4996)   // std::complex<Integer> is deprecated
 #if BOOST_MSVC < 1400
 #pragma warning(disable:4267)   // conversion from 'size_t' to 'unsigned int',
                                 // possible loss of data
 #endif
 #endif
 
+#if ( defined(__GNUC__) || defined(__clang__) ) && !defined(BOOST_INTEL_CXX_VERSION)
+#pragma GCC diagnostic ignored "-Wfloat-equal"
+#endif
+
+#include <boost/limits.hpp>
 #include <complex>
 #include <sstream>
-#include <boost/limits.hpp>
+#include <set>
 
 template <class T>
 void generic_complex_tests(std::complex<T> v)
 {
-    HASH_NAMESPACE::hash<std::complex<T> > complex_hasher;
+    BOOST_HASH_TEST_NAMESPACE::hash<std::complex<T> > complex_hasher;
 
     BOOST_TEST(complex_hasher(v) == complex_hasher(v));
 
-    HASH_NAMESPACE::hash<T> real_hasher;
+    BOOST_HASH_TEST_NAMESPACE::hash<T> real_hasher;
     T real = v.real();
     T imag = v.imag();
 
@@ -69,7 +75,7 @@ void complex_float_tests(Float*)
     generic_complex_tests(complex(0.5,0));
     generic_complex_tests(complex(25,0));
     generic_complex_tests(complex(25,0));
-    generic_complex_tests(complex(-67.5324535,56.23578678));
+    generic_complex_tests(complex(static_cast<Float>(-67.5324535),static_cast<Float>(56.23578678)));
 }
 
 template <class Integer>
@@ -80,8 +86,23 @@ void complex_integral_tests(Integer*)
     generic_complex_tests(complex(15342,124));
     generic_complex_tests(complex(25,54356));
     generic_complex_tests(complex(5325,2346));
-    generic_complex_tests(complex(-243897,-49923874));
-    generic_complex_tests(complex(-543,763));
+    generic_complex_tests(complex(Integer(-243897),Integer(-49923874)));
+    generic_complex_tests(complex(Integer(-543),Integer(763)));
+}
+
+template<class T> void complex_grid_test( short N )
+{
+    std::set<std::size_t> hashes;
+
+    for( short i = 0; i < N; ++i )
+    {
+        for( short j = 0; j < N; ++j )
+        {
+            hashes.insert( boost::hash< std::complex<T> >()( std::complex<T>( i, j ) ) );
+        }
+    }
+
+    BOOST_TEST_EQ( hashes.size(), static_cast<std::size_t>( N * N ) );
 }
 
 int main()
@@ -100,7 +121,12 @@ int main()
     complex_integral_tests((unsigned int*) 0);
     complex_integral_tests((unsigned long*) 0);
 
+    complex_grid_test<int>( 16 );
+    complex_grid_test<float>( 7 );
+    complex_grid_test<double>( 16 );
+    complex_grid_test<long double>( 15 );
+
     return boost::report_errors();
 }
 
-#endif // TEST_EXTENSIONS
+#endif // BOOST_HASH_TEST_EXTENSIONS

test/hash_container_test.cpp

@@ -0,0 +1,52 @@
+// Copyright 2022 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/container_hash/hash.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+#include <vector>
+#include <deque>
+#include <list>
+#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
+# include <forward_list>
+#endif
+
+template<class T> std::size_t hv( T const& t )
+{
+    return boost::hash<T>()( t );
+}
+
+template<class T> void test()
+{
+    for( std::size_t i = 0; i < 8; ++i )
+    {
+        std::vector<T> v( i );
+        std::size_t h0 = hv( v );
+
+        std::deque<T> d( v.begin(), v.end() );
+        BOOST_TEST_EQ( h0, hv( d ) );
+
+        std::list<T> l( v.begin(), v.end() );
+        BOOST_TEST_EQ( h0, hv( l ) );
+
+#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
+
+        std::forward_list<T> f( v.begin(), v.end() );
+        BOOST_TEST_EQ( h0, hv( f ) );
+
+#endif
+    }
+}
+
+int main()
+{
+    test<char>();
+    test<unsigned char>();
+    test<signed char>();
+    test<int>();
+    test<float>();
+    test<double>();
+
+    return boost::report_errors();
+}

test/hash_custom_test.cpp

@@ -15,7 +15,7 @@ namespace test
 
         std::size_t hash() const
         {
-            return value_ * 10;
+            return static_cast<std::size_t>(value_ * 10);
         }
 
 #if !defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
@@ -41,17 +41,17 @@ namespace boost
 
 #include "./config.hpp"
 
-#ifdef TEST_EXTENSIONS
-#  ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_EXTENSIONS
+#  ifdef BOOST_HASH_TEST_STD_INCLUDES
 #    include <functional>
 #  else
-#    include <boost/functional/hash.hpp>
+#    include <boost/container_hash/hash.hpp>
 #  endif
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
 
 #include <vector>
 #include <string>
@@ -59,13 +59,13 @@ namespace boost
 
 void custom_tests()
 {
-    HASH_NAMESPACE::hash<test::custom> custom_hasher;
+    BOOST_HASH_TEST_NAMESPACE::hash<test::custom> custom_hasher;
     BOOST_TEST(custom_hasher(10) == 100u);
     test::custom x(55);
     BOOST_TEST(custom_hasher(x) == 550u);
 
     {
-        using namespace HASH_NAMESPACE;
+        using namespace BOOST_HASH_TEST_NAMESPACE;
         BOOST_TEST(custom_hasher(x) == hash_value(x));
     }
 
@@ -75,25 +75,25 @@ void custom_tests()
     custom_vector.push_back(35);
 
     std::size_t seed = 0;
-    HASH_NAMESPACE::hash_combine(seed, test::custom(5));
-    HASH_NAMESPACE::hash_combine(seed, test::custom(25));
-    HASH_NAMESPACE::hash_combine(seed, test::custom(35));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, test::custom(5));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, test::custom(25));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, test::custom(35));
 
     std::size_t seed2 = 0;
-    HASH_NAMESPACE::hash_combine(seed2, 50u);
-    HASH_NAMESPACE::hash_combine(seed2, 250u);
-    HASH_NAMESPACE::hash_combine(seed2, 350u);
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed2, 50u);
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed2, 250u);
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed2, 350u);
 
-    BOOST_TEST(seed == HASH_NAMESPACE::hash_range(
+    BOOST_TEST(seed == BOOST_HASH_TEST_NAMESPACE::hash_range(
         custom_vector.begin(), custom_vector.end()));
     BOOST_TEST(seed == seed2);
 }
 
-#endif // TEST_EXTENSIONS
+#endif // BOOST_HASH_TEST_EXTENSIONS
 
 int main()
 {
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
     custom_tests();
 #endif
     return boost::report_errors();

test/hash_deque_test.cpp

@@ -5,17 +5,17 @@
 
 #include "./config.hpp"
 
-#ifdef TEST_EXTENSIONS
-#  ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_EXTENSIONS
+#  ifdef BOOST_HASH_TEST_STD_INCLUDES
 #    include <functional>
 #  else
-#    include <boost/functional/hash.hpp>
+#    include <boost/container_hash/hash.hpp>
 #  endif
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
 
 #include <deque>
 
@@ -23,11 +23,11 @@ using std::deque;
 #define CONTAINER_TYPE deque
 #include "./hash_sequence_test.hpp"
 
-#endif // TEST_EXTENSIONS
+#endif // BOOST_HASH_TEST_EXTENSIONS
 
 int main()
 {
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
     deque_tests::deque_hash_integer_tests();
 #endif
 

test/hash_enum_test.cpp

@@ -0,0 +1,63 @@
+
+// Copyright 2012 Daniel James.
+// 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 "./config.hpp"
+
+#ifdef BOOST_HASH_TEST_STD_INCLUDES
+#  include <functional>
+#else
+#  include <boost/container_hash/hash.hpp>
+#endif
+
+#include <boost/core/lightweight_test.hpp>
+#include "./compile_time.hpp"
+
+namespace test {
+    enum enum_override { enum_override1, enum_override2 };
+    std::size_t hash_value(enum_override) { return 896532; }
+
+    enum enum1 { enum1a };
+    enum enum2 { enum2a, enum2b };
+    enum enum3 { enum3a = 574, enum3b };
+    enum enum4 { enum4a = -12574, enum4b };
+}
+
+int main() {
+    compile_time_tests((test::enum1*) 0);
+    compile_time_tests((test::enum2*) 0);
+    compile_time_tests((test::enum3*) 0);
+    compile_time_tests((test::enum4*) 0);
+    compile_time_tests((test::enum_override*) 0);
+
+    BOOST_HASH_TEST_NAMESPACE::hash<test::enum1> hash1;
+    BOOST_HASH_TEST_NAMESPACE::hash<test::enum2> hash2;
+    BOOST_HASH_TEST_NAMESPACE::hash<test::enum3> hash3;
+    BOOST_HASH_TEST_NAMESPACE::hash<test::enum4> hash4;
+
+    BOOST_TEST(hash1(test::enum1a) == hash1(test::enum1a));
+
+    BOOST_TEST(hash2(test::enum2a) == hash2(test::enum2a));
+    BOOST_TEST(hash2(test::enum2a) != hash2(test::enum2b));
+    BOOST_TEST(hash2(test::enum2b) == hash2(test::enum2b));
+
+    BOOST_TEST(hash3(test::enum3a) == hash3(test::enum3a));
+    BOOST_TEST(hash3(test::enum3a) != hash3(test::enum3b));
+    BOOST_TEST(hash3(test::enum3b) == hash3(test::enum3b));
+
+    BOOST_TEST(hash4(test::enum4a) == hash4(test::enum4a));
+    BOOST_TEST(hash4(test::enum4a) != hash4(test::enum4b));
+    BOOST_TEST(hash4(test::enum4b) == hash4(test::enum4b));
+
+    BOOST_HASH_TEST_NAMESPACE::hash<test::enum_override> hash_override;
+
+    BOOST_TEST(hash_override(test::enum_override1) ==
+        hash_override(test::enum_override1));
+    BOOST_TEST(hash_override(test::enum_override1) ==
+        hash_override(test::enum_override2));
+    BOOST_TEST(hash_override(test::enum_override1) ==
+        hash_override(test::enum_override1));
+
+    return boost::report_errors();
+}

test/hash_float_test.hpp

@@ -5,18 +5,17 @@
 
 #include "./config.hpp"
 
-#ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_STD_INCLUDES
 #  include <functional>
 #else
-#  include <boost/functional/hash.hpp>
+#  include <boost/container_hash/hash.hpp>
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 
 #include <cmath>
-#include <boost/functional/hash/detail/limits.hpp>
-#include <boost/functional/hash/detail/float_functions.hpp>
-#include <boost/detail/workaround.hpp>
+#include <boost/container_hash/detail/limits.hpp>
+#include <boost/config/workaround.hpp>
 
 #include <iostream>
 
@@ -30,6 +29,10 @@
 #endif
 #endif
 
+#if ( defined(__GNUC__) || defined(__clang__) ) && !defined(BOOST_INTEL_CXX_VERSION)
+#pragma GCC diagnostic ignored "-Wfloat-equal"
+#endif
+
 char const* float_type(float*) { return "float"; }
 char const* float_type(double*) { return "double"; }
 char const* float_type(long double*) { return "long double"; }
@@ -39,7 +42,7 @@ void float_tests(char const* name, T* = 0)
 {
     std::cerr
         <<  "\n"
-        <<  "Testing " BOOST_STRINGIZE(HASH_NAMESPACE) "::hash<"
+        <<  "Testing " BOOST_STRINGIZE(BOOST_HASH_TEST_NAMESPACE) "::hash<"
         <<  name
         <<  ">\n"
         <<  "\n"
@@ -51,22 +54,9 @@ void float_tests(char const* name, T* = 0)
         <<  boost::hash_detail::limits<std::size_t>::digits
         <<  "\n"
         <<  "\n"
-        <<  "boost::hash_detail::call_ldexp<T>::float_type = "
-        <<  float_type(static_cast<BOOST_DEDUCED_TYPENAME
-                boost::hash_detail::call_ldexp<T>::float_type*>(0))
-        <<  "\n"
-        <<  "boost::hash_detail::call_frexp<T>::float_type = "
-        <<  float_type(static_cast<BOOST_DEDUCED_TYPENAME
-                boost::hash_detail::call_frexp<T>::float_type*>(0))
-        <<  "\n"
-        <<  "boost::hash_detail::select_hash_type<T>::type = "
-        <<  float_type(static_cast<BOOST_DEDUCED_TYPENAME
-                boost::hash_detail::select_hash_type<T>::type*>(0))
-        <<  "\n"
-        <<  "\n"
         ;
 
-    HASH_NAMESPACE::hash<T> x1;
+    BOOST_HASH_TEST_NAMESPACE::hash<T> x1;
 
     T zero = 0;
     T minus_zero = (T) -1 * zero;
@@ -74,9 +64,9 @@ void float_tests(char const* name, T* = 0)
     BOOST_TEST(zero == minus_zero);
     BOOST_TEST(x1(zero) == x1(minus_zero));
 
-#if defined(TEST_EXTENSIONS)
-    BOOST_TEST(x1(zero) == HASH_NAMESPACE::hash_value(zero));
-    BOOST_TEST(x1(minus_zero) == HASH_NAMESPACE::hash_value(minus_zero));
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
+    BOOST_TEST(x1(zero) == BOOST_HASH_TEST_NAMESPACE::hash_value(zero));
+    BOOST_TEST(x1(minus_zero) == BOOST_HASH_TEST_NAMESPACE::hash_value(minus_zero));
 #endif
 
     BOOST_TEST(x1(zero) != x1(0.5));
@@ -87,7 +77,7 @@ void float_tests(char const* name, T* = 0)
     using namespace std;
 
 // Doing anything with infinity causes borland to crash.
-#if defined(__BORLANDC__)
+#if defined(BOOST_BORLANDC)
     std::cerr
         <<  "Not running infinity checks on Borland, as it causes it to crash."
             "\n";
@@ -102,10 +92,10 @@ void float_tests(char const* name, T* = 0)
         T minus_infinity2 = (T) -1. / zero;
         T minus_infinity3 = (T) 1. / minus_zero;
 
-#if defined(TEST_EXTENSIONS)
-        BOOST_TEST(x1(infinity) == HASH_NAMESPACE::hash_value(infinity));
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
+        BOOST_TEST(x1(infinity) == BOOST_HASH_TEST_NAMESPACE::hash_value(infinity));
         BOOST_TEST(x1(minus_infinity)
-                == HASH_NAMESPACE::hash_value(minus_infinity));
+                == BOOST_HASH_TEST_NAMESPACE::hash_value(minus_infinity));
 #endif
 
         if(infinity == infinity2)
@@ -187,12 +177,12 @@ void float_tests(char const* name, T* = 0)
     BOOST_TEST(three_quarter_max != -three_quarter_max);
 
 
-#if defined(TEST_EXTENSIONS)
-    BOOST_TEST(x1(max) == HASH_NAMESPACE::hash_value(max));
-    BOOST_TEST(x1(half_max) == HASH_NAMESPACE::hash_value(half_max));
-    BOOST_TEST(x1(quarter_max) == HASH_NAMESPACE::hash_value(quarter_max));
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
+    BOOST_TEST(x1(max) == BOOST_HASH_TEST_NAMESPACE::hash_value(max));
+    BOOST_TEST(x1(half_max) == BOOST_HASH_TEST_NAMESPACE::hash_value(half_max));
+    BOOST_TEST(x1(quarter_max) == BOOST_HASH_TEST_NAMESPACE::hash_value(quarter_max));
     BOOST_TEST(x1(three_quarter_max) ==
-        HASH_NAMESPACE::hash_value(three_quarter_max));
+        BOOST_HASH_TEST_NAMESPACE::hash_value(three_quarter_max));
 #endif
 
     // The '!=' tests could legitimately fail, but with my hash it indicates a
@@ -223,16 +213,16 @@ void float_tests(char const* name, T* = 0)
     if(v1 == v2)
         BOOST_TEST(x1(v1) == x1(v2));
 
-#if defined(TEST_EXTENSIONS)
-    BOOST_TEST(x1(v1) == HASH_NAMESPACE::hash_value(v1));
-    BOOST_TEST(x1(v2) == HASH_NAMESPACE::hash_value(v2));
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
+    BOOST_TEST(x1(v1) == BOOST_HASH_TEST_NAMESPACE::hash_value(v1));
+    BOOST_TEST(x1(v2) == BOOST_HASH_TEST_NAMESPACE::hash_value(v2));
 #endif
     
 #endif
 
-#if defined(TEST_EXTENSIONS)
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
     BOOST_TEST(x1(boost::hash_detail::limits<T>::epsilon()) ==
-            HASH_NAMESPACE::hash_value(
+            BOOST_HASH_TEST_NAMESPACE::hash_value(
                 boost::hash_detail::limits<T>::epsilon()));
 #endif
 
@@ -265,12 +255,12 @@ void float_tests(char const* name, T* = 0)
         if(x1(boost::hash_detail::limits<T>::denorm_min()) == x1(zero)) {
             std::cerr<<"x1(denorm_min) == x1(zero) == "<<x1(zero)<<"\n";
         }
-#if !BOOST_WORKAROUND(__DECCXX_VER,<70190006) && defined(TEST_EXTENSIONS)
+#if !BOOST_WORKAROUND(__DECCXX_VER,<70190006) && defined(BOOST_HASH_TEST_EXTENSIONS)
         // The Tru64/CXX standard library prior to 7.1 contains a bug in the
         // specialization of boost::hash_detail::limits::denorm_min() for long
         // doubles which causes this test to fail.
         if(x1(boost::hash_detail::limits<T>::denorm_min()) !=
-            HASH_NAMESPACE::hash_value(
+            BOOST_HASH_TEST_NAMESPACE::hash_value(
                 boost::hash_detail::limits<T>::denorm_min()))
         {
             std::cerr
@@ -278,7 +268,7 @@ void float_tests(char const* name, T* = 0)
                 <<  x1(boost::hash_detail::limits<T>::denorm_min())
                 <<  "\nhash_value(boost::hash_detail::limits<T>::denorm_min())"
                     " = "
-                <<  HASH_NAMESPACE::hash_value(
+                <<  BOOST_HASH_TEST_NAMESPACE::hash_value(
                         boost::hash_detail::limits<T>::denorm_min())
                 <<  "\nx1(0) = "
                 <<  x1(0)
@@ -288,13 +278,13 @@ void float_tests(char const* name, T* = 0)
     }
 
 // NaN also causes borland to crash.
-#if !defined(__BORLANDC__) && defined(TEST_EXTENSIONS)
+#if !defined(BOOST_BORLANDC) && defined(BOOST_HASH_TEST_EXTENSIONS)
     if(boost::hash_detail::limits<T>::has_quiet_NaN) {
         if(x1(boost::hash_detail::limits<T>::quiet_NaN()) == x1(1.0)) {
             std::cerr<<"x1(quiet_NaN) == x1(1.0) == "<<x1(1.0)<<"\n";
         }
         BOOST_TEST(x1(boost::hash_detail::limits<T>::quiet_NaN()) ==
-            HASH_NAMESPACE::hash_value(
+            BOOST_HASH_TEST_NAMESPACE::hash_value(
                 boost::hash_detail::limits<T>::quiet_NaN()));
     }
 #endif

test/hash_forward_list_test.cpp

@@ -0,0 +1,59 @@
+// Copyright 2021 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined(__GNUC__) && __GNUC__ == 8
+# pragma GCC diagnostic ignored "-Wsign-conversion"
+#endif
+
+#include <boost/container_hash/hash.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
+
+BOOST_PRAGMA_MESSAGE( "Test skipped, BOOST_NO_CXX11_HDR_FORWARD_LIST is defined" )
+int main() {}
+
+#else
+
+#include <forward_list>
+
+template<class T> void test()
+{
+    typedef std::forward_list<T> list;
+    typedef boost::hash<list> hash;
+
+    int const N = 32;
+
+    std::size_t h[ N ];
+
+    list v;
+
+    for( int i = 0; i < N; ++i )
+    {
+        h[ i ] = hash()( v );
+
+        BOOST_TEST_EQ( h[ i ], hash()( v ) );
+
+        for( int j = 0; j < i; ++j )
+        {
+            BOOST_TEST_NE( h[ j ], h[ i ] );
+        }
+
+        v.push_front( T() );
+    }
+}
+
+int main()
+{
+    test<int>();
+    test<float>();
+    test<double>();
+    test< std::forward_list<int> >();
+
+    return boost::report_errors();
+}
+
+#endif

test/hash_friend_test.cpp

@@ -17,7 +17,7 @@ namespace test
 
         std::size_t hash() const
         {
-            return value_ * 10;
+            return static_cast<std::size_t>(value_ * 10);
         }
 
 #if !defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
@@ -44,17 +44,17 @@ namespace boost
 
 #include "./config.hpp"
 
-#ifdef TEST_EXTENSIONS
-#  ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_EXTENSIONS
+#  ifdef BOOST_HASH_TEST_STD_INCLUDES
 #    include <functional>
 #  else
-#    include <boost/functional/hash.hpp>
+#    include <boost/container_hash/hash.hpp>
 #  endif
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
 
 #include <vector>
 #include <string>
@@ -62,13 +62,13 @@ namespace boost
 
 void custom_tests()
 {
-    HASH_NAMESPACE::hash<test::custom<int> > custom_hasher;
+    BOOST_HASH_TEST_NAMESPACE::hash<test::custom<int> > custom_hasher;
     BOOST_TEST(custom_hasher(10) == 100u);
     test::custom<int> x(55);
     BOOST_TEST(custom_hasher(x) == 550u);
 
     {
-        using namespace HASH_NAMESPACE;
+        using namespace BOOST_HASH_TEST_NAMESPACE;
         BOOST_TEST(custom_hasher(x) == hash_value(x));
     }
 
@@ -78,25 +78,25 @@ void custom_tests()
     custom_vector.push_back(35);
 
     std::size_t seed = 0;
-    HASH_NAMESPACE::hash_combine(seed, test::custom<int>(5));
-    HASH_NAMESPACE::hash_combine(seed, test::custom<int>(25));
-    HASH_NAMESPACE::hash_combine(seed, test::custom<int>(35));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, test::custom<int>(5));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, test::custom<int>(25));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, test::custom<int>(35));
 
     std::size_t seed2 = 0;
-    HASH_NAMESPACE::hash_combine(seed2, 50u);
-    HASH_NAMESPACE::hash_combine(seed2, 250u);
-    HASH_NAMESPACE::hash_combine(seed2, 350u);
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed2, 50u);
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed2, 250u);
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed2, 350u);
 
-    BOOST_TEST(seed == HASH_NAMESPACE::hash_range(
+    BOOST_TEST(seed == BOOST_HASH_TEST_NAMESPACE::hash_range(
         custom_vector.begin(), custom_vector.end()));
     BOOST_TEST(seed == seed2);
 }
 
-#endif // TEST_EXTENSIONS
+#endif // BOOST_HASH_TEST_EXTENSIONS
 
 int main()
 {
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
     custom_tests();
 #endif
     return boost::report_errors();

test/hash_fs_path_test.cpp

@@ -0,0 +1,30 @@
+// Copyright 2022 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined(_MSC_VER)
+# pragma warning(disable: 4714) // forceinline not inlined
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+# pragma GCC diagnostic ignored "-Wsign-conversion"
+#endif
+
+#include <boost/filesystem/path.hpp>
+#include <boost/container_hash/hash.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+template<class T> std::size_t hv( T const& t )
+{
+    return boost::hash<T>()( t );
+}
+
+int main()
+{
+    boost::filesystem::path p1( "/foo/bar" );
+    boost::filesystem::path p2( "/foo/baz" );
+
+    BOOST_TEST_NE( hv( p1 ), hv( p2 ) );
+
+    return boost::report_errors();
+}

test/hash_function_pointer_test.cpp

@@ -5,17 +5,13 @@
 
 #include "./config.hpp"
 
-#ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_STD_INCLUDES
 #  include <functional>
 #else
-#  include <boost/functional/hash.hpp>
+#  include <boost/container_hash/hash.hpp>
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
-
-#include <boost/mpl/assert.hpp>
-#include <boost/type_traits/is_base_and_derived.hpp>
-
+#include <boost/core/lightweight_test.hpp>
 #include "./compile_time.hpp"
 
 void void_func1() { static int x = 1; ++x; }
@@ -28,8 +24,8 @@ void function_pointer_tests()
     compile_time_tests((void(**)()) 0);
     compile_time_tests((int(**)(int)) 0);
 
-    HASH_NAMESPACE::hash<void(*)()> hasher_void;
-    HASH_NAMESPACE::hash<int(*)(int)> hasher_int;
+    BOOST_HASH_TEST_NAMESPACE::hash<void(*)()> hasher_void;
+    BOOST_HASH_TEST_NAMESPACE::hash<int(*)(int)> hasher_int;
 
     BOOST_TEST(&void_func1 != &void_func2);
     BOOST_TEST(&int_func1 != &int_func2);
@@ -42,11 +38,11 @@ void function_pointer_tests()
     BOOST_TEST(hasher_int(&int_func1) == hasher_int(&int_func1));
     BOOST_TEST(hasher_int(&int_func1) != hasher_int(&int_func2));
     BOOST_TEST(hasher_int(&int_func1) != hasher_int(0));
-#if defined(TEST_EXTENSIONS)
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
     BOOST_TEST(hasher_void(&void_func1)
-            == HASH_NAMESPACE::hash_value(&void_func1));
+            == BOOST_HASH_TEST_NAMESPACE::hash_value(&void_func1));
     BOOST_TEST(hasher_int(&int_func1)
-            == HASH_NAMESPACE::hash_value(&int_func1));
+            == BOOST_HASH_TEST_NAMESPACE::hash_value(&int_func1));
 
     // This isn't specified in Peter's proposal:
     BOOST_TEST(hasher_void(0) == 0);

test/hash_fwd_test.hpp

@@ -5,8 +5,8 @@
 
 #include "./config.hpp"
 
-#if defined(TEST_EXTENSIONS) && !defined(TEST_STD_INCLUDES)
-#include <boost/functional/hash_fwd.hpp>
+#if defined(BOOST_HASH_TEST_EXTENSIONS) && !defined(BOOST_HASH_TEST_STD_INCLUDES)
+#include <boost/container_hash/hash_fwd.hpp>
 
 #include <boost/config.hpp>
 #include <cstddef>
@@ -25,7 +25,7 @@ namespace test {
     template <class T>
     std::size_t hash_value(test_type1<T> const& x)
     {
-        HASH_NAMESPACE::hash<T> hasher;
+        BOOST_HASH_TEST_NAMESPACE::hash<T> hasher;
         return hasher(x.value);
     }
 #endif
@@ -42,8 +42,8 @@ namespace test {
     std::size_t hash_value(test_type2<T> const& x)
     {
         std::size_t seed = 0;
-        HASH_NAMESPACE::hash_combine(seed, x.value1);
-        HASH_NAMESPACE::hash_combine(seed, x.value2);
+        BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, x.value1);
+        BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, x.value2);
         return seed;
     }
 #endif
@@ -61,8 +61,8 @@ namespace test {
     std::size_t hash_value(test_type3<T> const& x)
     {
         std::size_t seed =
-            HASH_NAMESPACE::hash_range(x.values.begin(), x.values.end());
-        HASH_NAMESPACE::hash_range(seed, x.values.begin(), x.values.end());
+            BOOST_HASH_TEST_NAMESPACE::hash_range(x.values.begin(), x.values.end());
+        BOOST_HASH_TEST_NAMESPACE::hash_range(seed, x.values.begin(), x.values.end());
         return seed;
     }
 #endif
@@ -76,7 +76,7 @@ namespace boost
     template <class T>
     std::size_t hash_value(test::test_type1<T> const& x)
     {
-        HASH_NAMESPACE::hash<T> hasher;
+        BOOST_HASH_TEST_NAMESPACE::hash<T> hasher;
         return hasher(x.value);
     }
 
@@ -84,8 +84,8 @@ namespace boost
     std::size_t hash_value(test::test_type2<T> const& x)
     {
         std::size_t seed = 0;
-        HASH_NAMESPACE::hash_combine(seed, x.value1);
-        HASH_NAMESPACE::hash_combine(seed, x.value2);
+        BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, x.value1);
+        BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, x.value2);
         return seed;
     }
 
@@ -93,8 +93,8 @@ namespace boost
     std::size_t hash_value(test::test_type3<T> const& x)
     {
         std::size_t seed =
-            HASH_NAMESPACE::hash_range(x.values.begin(), x.values.end());
-        HASH_NAMESPACE::hash_range(seed, x.values.begin(), x.values.end());
+            BOOST_HASH_TEST_NAMESPACE::hash_range(x.values.begin(), x.values.end());
+        BOOST_HASH_TEST_NAMESPACE::hash_range(seed, x.values.begin(), x.values.end());
         return seed;
     }
 }

test/hash_fwd_test_1.cpp

@@ -9,11 +9,11 @@
 
 #include "./hash_fwd_test.hpp"
 
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 
-#if defined(TEST_EXTENSIONS) && !defined(TEST_STD_INCLUDES)
+#if defined(BOOST_HASH_TEST_EXTENSIONS) && !defined(BOOST_HASH_TEST_STD_INCLUDES)
 
-#include <boost/functional/hash.hpp>
+#include <boost/container_hash/hash.hpp>
 #include <string>
 
 void fwd_test1()
@@ -21,10 +21,10 @@ void fwd_test1()
     test::test_type1<int> x(5);
     test::test_type1<std::string> y("Test");
 
-    HASH_NAMESPACE::hash<int> hasher_int;
-    HASH_NAMESPACE::hash<std::string> hasher_string;
-    HASH_NAMESPACE::hash<test::test_type1<int> > hasher_test_int;
-    HASH_NAMESPACE::hash<test::test_type1<std::string> > hasher_test_string;
+    BOOST_HASH_TEST_NAMESPACE::hash<int> hasher_int;
+    BOOST_HASH_TEST_NAMESPACE::hash<std::string> hasher_string;
+    BOOST_HASH_TEST_NAMESPACE::hash<test::test_type1<int> > hasher_test_int;
+    BOOST_HASH_TEST_NAMESPACE::hash<test::test_type1<std::string> > hasher_test_string;
 
     BOOST_TEST(hasher_int(5) == hasher_test_int(x));
     BOOST_TEST(hasher_string("Test") == hasher_test_string(y));
@@ -36,15 +36,15 @@ void fwd_test2()
     test::test_type2<std::string> y("Test1", "Test2");
 
     std::size_t seed1 = 0;
-    HASH_NAMESPACE::hash_combine(seed1, 5);
-    HASH_NAMESPACE::hash_combine(seed1, 10);
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed1, 5);
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed1, 10);
 
     std::size_t seed2 = 0;
-    HASH_NAMESPACE::hash_combine(seed2, std::string("Test1"));
-    HASH_NAMESPACE::hash_combine(seed2, std::string("Test2"));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed2, std::string("Test1"));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed2, std::string("Test2"));
 
-    HASH_NAMESPACE::hash<test::test_type2<int> > hasher_test_int;
-    HASH_NAMESPACE::hash<test::test_type2<std::string> > hasher_test_string;
+    BOOST_HASH_TEST_NAMESPACE::hash<test::test_type2<int> > hasher_test_int;
+    BOOST_HASH_TEST_NAMESPACE::hash<test::test_type2<std::string> > hasher_test_string;
 
     BOOST_TEST(seed1 == hasher_test_int(x));
     BOOST_TEST(seed2 == hasher_test_string(y));
@@ -69,15 +69,15 @@ void fwd_test3()
     test::test_type3<std::string> y(values2.begin(), values2.end());
 
     std::size_t seed1 =
-        HASH_NAMESPACE::hash_range(values1.begin(), values1.end());
-    HASH_NAMESPACE::hash_range(seed1, values1.begin(), values1.end());
+        BOOST_HASH_TEST_NAMESPACE::hash_range(values1.begin(), values1.end());
+    BOOST_HASH_TEST_NAMESPACE::hash_range(seed1, values1.begin(), values1.end());
 
     std::size_t seed2 =
-        HASH_NAMESPACE::hash_range(values2.begin(), values2.end());
-    HASH_NAMESPACE::hash_range(seed2, values2.begin(), values2.end());
+        BOOST_HASH_TEST_NAMESPACE::hash_range(values2.begin(), values2.end());
+    BOOST_HASH_TEST_NAMESPACE::hash_range(seed2, values2.begin(), values2.end());
 
-    HASH_NAMESPACE::hash<test::test_type3<int> > hasher_test_int;
-    HASH_NAMESPACE::hash<test::test_type3<std::string> > hasher_test_string;
+    BOOST_HASH_TEST_NAMESPACE::hash<test::test_type3<int> > hasher_test_int;
+    BOOST_HASH_TEST_NAMESPACE::hash<test::test_type3<std::string> > hasher_test_string;
 
     BOOST_TEST(seed1 == hasher_test_int(x));
     BOOST_TEST(seed2 == hasher_test_string(y));
@@ -87,7 +87,7 @@ void fwd_test3()
 
 int main()
 {
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
     fwd_test1();
     fwd_test2();
     fwd_test3();

test/hash_fwd_test_2.cpp

@@ -8,14 +8,14 @@
 
 #include "./config.hpp"
 
-#if !defined(TEST_EXTENSIONS) || defined(TEST_STD_INCLUDES)
+#if !defined(BOOST_HASH_TEST_EXTENSIONS) || defined(BOOST_HASH_TEST_STD_INCLUDES)
 
 int main() {}
 
 #else
 
 #include "./hash_fwd_test.hpp"
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 
 template <class T> void unused(T const&) {}
 
@@ -44,4 +44,4 @@ int main()
     return boost::report_errors();
 }
 
-#endif // defined(TEST_EXTENSIONS) && !defined(TEST_STD_INCLUDES)
+#endif // defined(BOOST_HASH_TEST_EXTENSIONS) && !defined(BOOST_HASH_TEST_STD_INCLUDES)

test/hash_global_namespace_test.cpp

@@ -17,7 +17,7 @@ struct custom
 
     std::size_t hash() const
     {
-        return value_ * 10;
+        return static_cast<std::size_t>(value_ * 10);
     }
 
 #if !defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
@@ -42,17 +42,17 @@ namespace boost
 
 #include "./config.hpp"
 
-#ifdef TEST_EXTENSIONS
-#  ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_EXTENSIONS
+#  ifdef BOOST_HASH_TEST_STD_INCLUDES
 #    include <functional>
 #  else
-#    include <boost/functional/hash.hpp>
+#    include <boost/container_hash/hash.hpp>
 #  endif
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
 
 #include <vector>
 #include <string>
@@ -60,13 +60,13 @@ namespace boost
 
 void custom_tests()
 {
-    HASH_NAMESPACE::hash<custom> custom_hasher;
+    BOOST_HASH_TEST_NAMESPACE::hash<custom> custom_hasher;
     BOOST_TEST(custom_hasher(10) == 100u);
     custom x(55);
     BOOST_TEST(custom_hasher(x) == 550u);
 
     {
-        using namespace HASH_NAMESPACE;
+        using namespace BOOST_HASH_TEST_NAMESPACE;
         BOOST_TEST(custom_hasher(x) == hash_value(x));
     }
 
@@ -76,26 +76,26 @@ void custom_tests()
     custom_vector.push_back(35);
 
     std::size_t seed = 0;
-    HASH_NAMESPACE::hash_combine(seed, custom(5));
-    HASH_NAMESPACE::hash_combine(seed, custom(25));
-    HASH_NAMESPACE::hash_combine(seed, custom(35));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, custom(5));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, custom(25));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed, custom(35));
 
     std::size_t seed2 = 0;
-    HASH_NAMESPACE::hash_combine(seed2, 50u);
-    HASH_NAMESPACE::hash_combine(seed2, 250u);
-    HASH_NAMESPACE::hash_combine(seed2, 350u);
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed2, 50u);
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed2, 250u);
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(seed2, 350u);
 
-    BOOST_TEST(seed == HASH_NAMESPACE::hash_range(
+    BOOST_TEST(seed == BOOST_HASH_TEST_NAMESPACE::hash_range(
         custom_vector.begin(), custom_vector.end()));
     BOOST_TEST(seed == seed2);
 }
 
-#endif // TEST_EXTENSIONS
+#endif // BOOST_HASH_TEST_EXTENSIONS
 
 
 int main()
 {
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
     custom_tests();
 #endif
     return boost::report_errors();

test/hash_info.cpp

@@ -0,0 +1,124 @@
+
+// Copyright 2017 Daniel James.
+// 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)
+
+// Not a test, just a small program to write out configuration info
+
+#include <boost/container_hash/hash.hpp>
+#include <iostream>
+#include <algorithm>
+#include <limits>
+#include <climits>
+
+#if defined(BOOST_MSVC)
+
+struct msvc_version {
+    unsigned version;
+    char const* description;
+
+    friend bool operator<(msvc_version const& v1, msvc_version const& v2) {
+        return v1.version < v2.version;
+    }
+};
+
+void write_compiler_info() {
+    // From:
+    // https://en.wikipedia.org/wiki/Microsoft_Visual_C%2B%2B
+    // https://blogs.msdn.microsoft.com/vcblog/2017/11/15/side-by-side-minor-version-msvc-toolsets-in-visual-studio-2017/
+    msvc_version versions[] = {
+        {0, "Old Visual C++"},
+        {1000, "Visual C++ 4.x, VS4.0?"},
+        {1100, "Visual C++ 5.0, VS97"},
+        {1200, "Visual C++ 6.0, VS6.0"},
+        {1300, "Visual C++ 7.0, VS.NET 2002"},
+        {1310, "Visual C++ 7.1, VS.NET 2003"},
+        {1400, "Visual C++ 8.0, VS2005"},
+        {1500, "Visual C++ 9.0, VS2008"},
+        {1600, "Visual C++ 10.0, VS2010"},
+        {1700, "Visual C++ 11.0, VS2012"},
+        {1800, "Visual C++ 12.0, VS2013"},
+        {1900, "Visual C++ 14.00, VS2015"},
+        {1910, "Visual C++ 14.1x, VS2017"},
+        {1920, "Visual C++ 14.2x, VS2019"},
+        {1930, "Visual C++ 14.3x, VS2022"},
+    };
+
+    msvc_version msvc = { BOOST_MSVC, "" };
+    msvc_version* v = std::upper_bound(versions,
+        versions + sizeof(versions) / sizeof(*versions),
+        msvc) - 1;
+    unsigned difference = msvc.version - v->version;
+
+    std::cout << v->description << std::endl;
+    if (difference) {
+        std::cout << "+" << difference << std::endl;
+    }
+}
+
+#else
+
+void write_compiler_info() {
+}
+
+#endif
+
+#define PRINT(x) std::cout << #x ": " << x << std::endl
+
+int main() {
+    write_compiler_info();
+    std::cout << std::endl;
+
+    PRINT(__cplusplus);
+    PRINT(BOOST_CXX_VERSION);
+    std::cout << std::endl;
+
+#if defined(BOOST_NO_CXX17_HDR_STRING_VIEW)
+    std::cout << "No <string_view>" << std::endl;
+#else
+    std::cout << "Has <string_view>" << std::endl;
+#endif
+
+#if defined(BOOST_NO_CXX17_HDR_OPTIONAL)
+    std::cout << "No <optional>" << std::endl;
+#else
+    std::cout << "Has <optional>" << std::endl;
+#endif
+
+#if defined(BOOST_NO_CXX17_HDR_VARIANT)
+    std::cout << "No <variant>" << std::endl;
+#else
+    std::cout << "Has <variant>" << std::endl;
+#endif
+
+#if defined(BOOST_NO_CXX11_HDR_TYPEINDEX)
+    std::cout << "No <typeindex>" << std::endl;
+#else
+    std::cout << "Has <typeindex>" << std::endl;
+#endif
+
+#if defined(BOOST_NO_CXX11_HDR_SYSTEM_ERROR)
+    std::cout << "No <system_error>" << std::endl;
+#else
+    std::cout << "Has <system_error>" << std::endl;
+#endif
+
+    std::cout << std::endl;
+
+    PRINT(CHAR_BIT);
+    std::cout << std::endl;
+
+    PRINT(sizeof(std::size_t)*CHAR_BIT);
+    std::cout << std::endl;
+
+    PRINT(sizeof(float)*CHAR_BIT);
+    PRINT(std::numeric_limits<float>::digits);
+    std::cout << std::endl;
+
+    PRINT(sizeof(double)*CHAR_BIT);
+    PRINT(std::numeric_limits<double>::digits);
+    std::cout << std::endl;
+
+    PRINT(sizeof(long double)*CHAR_BIT);
+    PRINT(std::numeric_limits<long double>::digits);
+}

test/hash_integral_test.cpp

@@ -0,0 +1,75 @@
+// Copyright 2005-2009 Daniel James.
+// Copyright 2021 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/container_hash/hash.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/core/type_name.hpp>
+#include <boost/type_traits/is_signed.hpp>
+#include <set>
+
+#if defined(BOOST_MSVC)
+#pragma warning(disable: 4127) // conditional expression is constant
+#endif
+
+// This test checks that small numbers hash to themselves even if
+// their type is wider than size_t
+
+template<class T>
+void identity_test()
+{
+    if( boost::is_signed<T>::value )
+    {
+        for( int i = -128; i <= 127; ++i )
+        {
+            BOOST_TEST_EQ( boost::hash<T>()( static_cast<T>( i ) ), static_cast<std::size_t>( i ) );
+        }
+    }
+    else
+    {
+        for( int i = 0; i <= 255; ++i )
+        {
+            BOOST_TEST_EQ( boost::hash<T>()( static_cast<T>( i ) ), static_cast<std::size_t>( i ) );
+        }
+    }
+}
+
+#define TEST(type) std::cerr << "Testing: " #type " (" << boost::core::type_name<type>() << ")\n"; identity_test<type>();
+
+int main()
+{
+    TEST(char)
+    TEST(signed char)
+    TEST(unsigned char)
+#ifndef BOOST_NO_INTRINSIC_WCHAR_T
+    TEST(wchar_t)
+#endif
+#ifndef BOOST_NO_CXX11_CHAR16_T
+    TEST(char16_t)
+#endif
+#ifndef BOOST_NO_CXX11_CHAR32_T
+    TEST(char32_t)
+#endif
+    TEST(short)
+    TEST(unsigned short)
+    TEST(int)
+    TEST(unsigned int)
+    TEST(long)
+    TEST(unsigned long)
+
+#if !defined(BOOST_NO_LONG_LONG)
+    TEST(boost::long_long_type)
+    TEST(boost::ulong_long_type)
+#endif
+
+#if defined(BOOST_HAS_INT128)
+    TEST(boost::int128_type)
+    TEST(boost::uint128_type)
+#endif
+
+    TEST(std::size_t)
+    TEST(std::ptrdiff_t)
+
+    return boost::report_errors();
+}

test/hash_list_test.cpp

@@ -5,17 +5,17 @@
 
 #include "./config.hpp"
 
-#ifdef TEST_EXTENSIONS
-#  ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_EXTENSIONS
+#  ifdef BOOST_HASH_TEST_STD_INCLUDES
 #    include <functional>
 #  else
-#    include <boost/functional/hash.hpp>
+#    include <boost/container_hash/hash.hpp>
 #  endif
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
 
 #include <list>
 
@@ -23,11 +23,11 @@ using std::list;
 #define CONTAINER_TYPE list
 #include "./hash_sequence_test.hpp"
 
-#endif // TEST_EXTENSIONS
+#endif // BOOST_HASH_TEST_EXTENSIONS
 
 int main()
 {
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
     list_tests::list_hash_integer_tests();
 #endif
 

test/hash_map_test.cpp

@@ -5,19 +5,19 @@
 
 #include "./config.hpp"
 
-#ifdef TEST_EXTENSIONS
-#  ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_EXTENSIONS
+#  ifdef BOOST_HASH_TEST_STD_INCLUDES
 #    include <functional>
 #  else
-#    include <boost/functional/hash.hpp>
+#    include <boost/container_hash/hash.hpp>
 #  endif
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 
 #include <map>
 
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
 
 using std::map;
 #define CONTAINER_TYPE map
@@ -27,11 +27,11 @@ using std::multimap;
 #define CONTAINER_TYPE multimap
 #include "./hash_map_test.hpp"
 
-#endif // TEST_EXTENSTIONS
+#endif // BOOST_HASH_TEST_EXTENSIONS
 
 int main()
 {
-#ifdef TEST_EXTENSIONS
+#ifdef BOOST_HASH_TEST_EXTENSIONS
     map_tests::map_hash_integer_tests();
     multimap_tests::multimap_hash_integer_tests();
 #endif

test/hash_map_test.hpp

@@ -7,15 +7,18 @@
 #error "CONTAINER_TYPE not defined"
 #else
 
-#include <boost/preprocessor/cat.hpp>
-
 #if defined(BOOST_MSVC)
 #pragma warning(push)
 #pragma warning(disable:4244) // conversion from 'int' to 'float'
 #pragma warning(disable:4245) // signed/unsigned mismatch
 #endif
 
-namespace BOOST_PP_CAT(CONTAINER_TYPE, _tests)
+#if defined(__GNUC__) && __GNUC__ == 8
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wsign-conversion"
+#endif
+
+namespace HASH_TEST_CAT(CONTAINER_TYPE, _tests)
 {
     template <class T>
     void integer_tests(T* = 0)
@@ -38,16 +41,16 @@ namespace BOOST_PP_CAT(CONTAINER_TYPE, _tests)
         containers[9].insert(pair(key(-1),value(3)));
         containers[9].insert(pair(key(-1),value(3)));
 
-        HASH_NAMESPACE::hash<T> hasher;
+        BOOST_HASH_TEST_NAMESPACE::hash<T> hasher;
 
         for(int i2 = 0; i2 < number_of_containers; ++i2) {
             BOOST_TEST(hasher(containers[i2]) == hasher(containers[i2]));
 
             BOOST_TEST(hasher(containers[i2]) ==
-                    HASH_NAMESPACE::hash_value(containers[i2]));
+                    BOOST_HASH_TEST_NAMESPACE::hash_value(containers[i2]));
 
             BOOST_TEST(hasher(containers[i2])
-                    == HASH_NAMESPACE::hash_range(
+                    == BOOST_HASH_TEST_NAMESPACE::hash_range(
                         containers[i2].begin(), containers[i2].end()));
 
             for(int j2 = i2 + 1; j2 < number_of_containers; ++j2) {
@@ -59,7 +62,7 @@ namespace BOOST_PP_CAT(CONTAINER_TYPE, _tests)
         }
     }
 
-    void BOOST_PP_CAT(CONTAINER_TYPE, _hash_integer_tests())
+    void HASH_TEST_CAT(CONTAINER_TYPE, _hash_integer_tests())
     {
         integer_tests((CONTAINER_TYPE<char, unsigned char>*) 0);
         integer_tests((CONTAINER_TYPE<int, float>*) 0);
@@ -68,6 +71,10 @@ namespace BOOST_PP_CAT(CONTAINER_TYPE, _tests)
     }
 }
 
+#if defined(__GNUC__) && __GNUC__ == 8
+# pragma GCC diagnostic pop
+#endif
+
 #if defined(BOOST_MSVC)
 #pragma warning(pop)
 #endif

test/hash_no_ext_fail_test.cpp

@@ -1,28 +0,0 @@
-
-// Copyright 2006-2009 Daniel James.
-// 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 "./config.hpp"
-
-// Simple test to make sure BOOST_HASH_NO_EXTENSIONS does disable extensions
-// (or at least one of them).
-#if !defined(BOOST_HASH_NO_EXTENSIONS)
-#  define BOOST_HASH_NO_EXTENSIONS
-#endif
-
-#ifdef TEST_STD_INCLUDES
-#  include <functional>
-#else
-#  include <boost/functional/hash.hpp>
-#endif
-
-template <class T> void ignore(T const&) {}
-
-int main()
-{
-    HASH_NAMESPACE::hash< int[10] > hasher;
-    ignore(hasher);
-
-    return 0;
-}

test/hash_no_ext_macro_1.cpp

@@ -5,32 +5,32 @@
 
 #include "./config.hpp"
 
-#if defined(TEST_EXTENSIONS)
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
 
 // Include header without BOOST_HASH_NO_EXTENSIONS defined
 #  if defined(BOOST_HASH_NO_EXTENSIONS)
 #    undef BOOST_HASH_NO_EXTENSIONS
 #  endif
-#  include <boost/functional/hash.hpp>
+#  include <boost/container_hash/hash.hpp>
 
 // Include header with BOOST_HASH_NO_EXTENSIONS defined
 #  define BOOST_HASH_NO_EXTENSIONS
-#  include <boost/functional/hash.hpp>
+#  include <boost/container_hash/hash.hpp>
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 #include <deque>
 
 int main()
 {
-#if defined(TEST_EXTENSIONS)
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
     std::deque<int> x;
 
     x.push_back(1);
     x.push_back(2);
 
-    HASH_NAMESPACE::hash<std::deque<int> > hasher;
-    BOOST_TEST(hasher(x) == HASH_NAMESPACE::hash_value(x));
+    BOOST_HASH_TEST_NAMESPACE::hash<std::deque<int> > hasher;
+    BOOST_TEST(hasher(x) == BOOST_HASH_TEST_NAMESPACE::hash_value(x));
 #endif
 
     return boost::report_errors();

test/hash_no_ext_macro_2.cpp

@@ -5,32 +5,32 @@
 
 #include "./config.hpp"
 
-#if defined(TEST_EXTENSIONS)
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
 
 // Include header with BOOST_HASH_NO_EXTENSIONS defined
 #  if !defined(BOOST_HASH_NO_EXTENSIONS)
 #    define BOOST_HASH_NO_EXTENSIONS
 #  endif
-#  include <boost/functional/hash.hpp>
+#  include <boost/container_hash/hash.hpp>
 
 // Include header without BOOST_HASH_NO_EXTENSIONS defined
 #  undef BOOST_HASH_NO_EXTENSIONS
-#  include <boost/functional/hash.hpp>
+#  include <boost/container_hash/hash.hpp>
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 #include <map>
 
 int main()
 {
-#if defined(TEST_EXTENSIONS)
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
     std::map<int, int> x;
 
     x.insert(std::map<int, int>::value_type(53, -42));
     x.insert(std::map<int, int>::value_type(14, -75));
 
-    HASH_NAMESPACE::hash<std::map<int, int> > hasher;
-    BOOST_TEST(hasher(x) == HASH_NAMESPACE::hash_value(x));
+    BOOST_HASH_TEST_NAMESPACE::hash<std::map<int, int> > hasher;
+    BOOST_TEST(hasher(x) == BOOST_HASH_TEST_NAMESPACE::hash_value(x));
 #endif
     
     return boost::report_errors();

test/hash_number_test.cpp

@@ -5,19 +5,17 @@
 
 #include "./config.hpp"
 
-#ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_STD_INCLUDES
 #  include <functional>
 #else
-#  include <boost/functional/hash.hpp>
+#  include <boost/container_hash/hash.hpp>
 #endif
 
 #include <iostream>
-#include <boost/detail/lightweight_test.hpp>
+#include <boost/core/lightweight_test.hpp>
 
-#include <boost/preprocessor/cat.hpp>
-#include <boost/functional/hash/detail/limits.hpp>
-#include <boost/mpl/assert.hpp>
-#include <boost/type_traits/is_base_and_derived.hpp>
+#include <boost/container_hash/detail/limits.hpp>
+#include <boost/core/enable_if.hpp>
 
 #include "./compile_time.hpp"
 
@@ -28,15 +26,41 @@
 #pragma warning(disable:4310) // cast truncates constant value
 #endif
 
+#if ( defined(__GNUC__) || defined(__clang__) ) && !defined(BOOST_INTEL_CXX_VERSION)
+#pragma GCC diagnostic ignored "-Wfloat-equal"
+#endif
+
 template <class T>
-void numeric_test(T*)
+void numeric_extra_tests(typename
+    boost::enable_if_c<boost::hash_detail::limits<T>::is_integer,
+        void*>::type = 0)
 {
     typedef boost::hash_detail::limits<T> limits;
 
+    if(limits::is_signed ||
+        limits::digits <= boost::hash_detail::limits<std::size_t>::digits)
+    {
+        BOOST_TEST(BOOST_HASH_TEST_NAMESPACE::hash_value(T(-5)) == (std::size_t)T(-5));
+    }
+    BOOST_TEST(BOOST_HASH_TEST_NAMESPACE::hash_value(T(0)) == (std::size_t)T(0u));
+    BOOST_TEST(BOOST_HASH_TEST_NAMESPACE::hash_value(T(10)) == (std::size_t)T(10u));
+    BOOST_TEST(BOOST_HASH_TEST_NAMESPACE::hash_value(T(25)) == (std::size_t)T(25u));
+}
+
+template <class T>
+void numeric_extra_tests(typename
+    boost::disable_if_c<boost::hash_detail::limits<T>::is_integer,
+        void*>::type = 0)
+{
+}
+
+template <class T>
+void numeric_test(T*)
+{
     compile_time_tests((T*) 0);
 
-    HASH_NAMESPACE::hash<T> x1;
-    HASH_NAMESPACE::hash<T> x2;
+    BOOST_HASH_TEST_NAMESPACE::hash<T> x1;
+    BOOST_HASH_TEST_NAMESPACE::hash<T> x2;
 
     T v1 = (T) -5;
     BOOST_TEST(x1(v1) == x2(v1));
@@ -47,23 +71,13 @@ void numeric_test(T*)
     BOOST_TEST(x1(T(5) - T(5)) == x2(T(0)));
     BOOST_TEST(x1(T(6) + T(4)) == x2(T(10)));
 
-#if defined(TEST_EXTENSIONS)
-    BOOST_TEST(x1(T(-5)) == HASH_NAMESPACE::hash_value(T(-5)));
-    BOOST_TEST(x1(T(0)) == HASH_NAMESPACE::hash_value(T(0)));
-    BOOST_TEST(x1(T(10)) == HASH_NAMESPACE::hash_value(T(10)));
-    BOOST_TEST(x1(T(25)) == HASH_NAMESPACE::hash_value(T(25)));
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
+    BOOST_TEST(x1(T(-5)) == BOOST_HASH_TEST_NAMESPACE::hash_value(T(-5)));
+    BOOST_TEST(x1(T(0)) == BOOST_HASH_TEST_NAMESPACE::hash_value(T(0)));
+    BOOST_TEST(x1(T(10)) == BOOST_HASH_TEST_NAMESPACE::hash_value(T(10)));
+    BOOST_TEST(x1(T(25)) == BOOST_HASH_TEST_NAMESPACE::hash_value(T(25)));
 
-    if (limits::is_integer)
-    {
-        if(limits::is_signed ||
-            limits::digits <= boost::hash_detail::limits<std::size_t>::digits)
-        {
-            BOOST_TEST(HASH_NAMESPACE::hash_value(T(-5)) == (std::size_t)T(-5));
-        }
-        BOOST_TEST(HASH_NAMESPACE::hash_value(T(0)) == (std::size_t)T(0u));
-        BOOST_TEST(HASH_NAMESPACE::hash_value(T(10)) == (std::size_t)T(10u));
-        BOOST_TEST(HASH_NAMESPACE::hash_value(T(25)) == (std::size_t)T(25u));
-    }
+    numeric_extra_tests<T>();
 #endif
 }
 
@@ -74,8 +88,8 @@ void limits_test(T*)
 
     if(limits::is_specialized)
     {
-        HASH_NAMESPACE::hash<T> x1;
-        HASH_NAMESPACE::hash<T> x2;
+        BOOST_HASH_TEST_NAMESPACE::hash<T> x1;
+        BOOST_HASH_TEST_NAMESPACE::hash<T> x2;
 
         T min_value = (limits::min)();
         T max_value = (limits::max)();
@@ -83,16 +97,14 @@ void limits_test(T*)
         BOOST_TEST(x1(min_value) == x2((limits::min)()));
         BOOST_TEST(x1(max_value) == x2((limits::max)()));
 
-#if defined(TEST_EXTENSIONS)
-        BOOST_TEST(x1(min_value) == HASH_NAMESPACE::hash_value(min_value));
-        BOOST_TEST(x1(max_value) == HASH_NAMESPACE::hash_value(max_value));
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
+        BOOST_TEST(x1(min_value) == BOOST_HASH_TEST_NAMESPACE::hash_value(min_value));
+        BOOST_TEST(x1(max_value) == BOOST_HASH_TEST_NAMESPACE::hash_value(max_value));
 
         if (limits::is_integer)
         {
-            BOOST_TEST(HASH_NAMESPACE::hash_value(min_value)
-                    == std::size_t(min_value));
-            BOOST_TEST(HASH_NAMESPACE::hash_value(max_value)
-                    == std::size_t(max_value));
+            BOOST_TEST_EQ(BOOST_HASH_TEST_NAMESPACE::hash_value(min_value), std::size_t(min_value));
+            BOOST_TEST_EQ(BOOST_HASH_TEST_NAMESPACE::hash_value(max_value), std::size_t(max_value));
         }
 #endif
     }
@@ -103,8 +115,8 @@ void poor_quality_tests(T*)
 {
     typedef boost::hash_detail::limits<T> limits;
 
-    HASH_NAMESPACE::hash<T> x1;
-    HASH_NAMESPACE::hash<T> x2;
+    BOOST_HASH_TEST_NAMESPACE::hash<T> x1;
+    BOOST_HASH_TEST_NAMESPACE::hash<T> x2;
 
     // A hash function can legally fail these tests, but it'll not be a good
     // sign.
@@ -112,15 +124,20 @@ void poor_quality_tests(T*)
         BOOST_TEST(x1(T(1)) !=  x2(T(-1)));
     if(T(1) != T(2))
         BOOST_TEST(x1(T(1)) !=  x2(T(2)));
-    if((limits::max)() != (limits::max)() - 1)
-        BOOST_TEST(x1((limits::max)()) != x2((limits::max)() - 1));
+
+    // TODO: This test is useless for floating point numbers.
+    T max_number = static_cast<T>((limits::max)());
+    T max_minus_one = static_cast<T>(max_number - 1);
+    if (max_number != max_minus_one) {
+        BOOST_TEST(x1(max_number) != x1(max_minus_one));
+    }
 }
 
 void bool_test()
 {
-    HASH_NAMESPACE::hash<bool> x1;
-    HASH_NAMESPACE::hash<bool> x2;
-    
+    BOOST_HASH_TEST_NAMESPACE::hash<bool> x1;
+    BOOST_HASH_TEST_NAMESPACE::hash<bool> x2;
+
     BOOST_TEST(x1(true) == x2(true));
     BOOST_TEST(x1(false) == x2(false));
     BOOST_TEST(x1(true) != x2(false));
@@ -144,6 +161,12 @@ int main()
     NUMERIC_TEST(unsigned char, uchar)
 #ifndef BOOST_NO_INTRINSIC_WCHAR_T
     NUMERIC_TEST(wchar_t, wchar)
+#endif
+#ifndef BOOST_NO_CXX11_CHAR16_T
+    NUMERIC_TEST(char16_t, char16)
+#endif
+#ifndef BOOST_NO_CXX11_CHAR32_T
+    NUMERIC_TEST(char32_t, char32)
 #endif
     NUMERIC_TEST(short, short)
     NUMERIC_TEST(unsigned short, ushort)
@@ -157,6 +180,11 @@ int main()
     NUMERIC_TEST_NO_LIMITS(boost::ulong_long_type, ulong_long)
 #endif
 
+#if defined(BOOST_HAS_INT128)
+    NUMERIC_TEST_NO_LIMITS(boost::int128_type, int128)
+    NUMERIC_TEST_NO_LIMITS(boost::uint128_type, uint128)
+#endif
+
     NUMERIC_TEST(float, float)
     NUMERIC_TEST(double, double)
 

test/hash_number_test2.cpp

@@ -0,0 +1,90 @@
+// Copyright 2005-2009 Daniel James.
+// Copyright 2021 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/container_hash/hash.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/core/type_name.hpp>
+#include <set>
+
+#if defined(BOOST_MSVC)
+# pragma warning(disable: 4244) // conversion from int to float
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+# pragma GCC diagnostic ignored "-Wconversion"
+# pragma GCC diagnostic ignored "-Wsign-conversion"
+#endif
+
+// This test checks for collisions in a small range of numbers
+
+template<class T, int M>
+void collision_test_()
+{
+    std::set<std::size_t> hashes;
+
+    for( int i = -128; i <= 127; ++i )
+    {
+        hashes.insert( boost::hash<T>()( i * M ) );
+    }
+
+    BOOST_TEST_EQ( hashes.size(), 256u );
+}
+
+template <class T>
+void collision_test()
+{
+    collision_test_<T, 1>();
+    collision_test_<T, 2>();
+    collision_test_<T, 3>();
+    collision_test_<T, 4>();
+    collision_test_<T, 5>();
+    collision_test_<T, 8>();
+    collision_test_<T, 10>();
+    collision_test_<T, 16>();
+    collision_test_<T, 32>();
+    collision_test_<T, 64>();
+    collision_test_<T, 100>();
+    collision_test_<T, 128>();
+}
+
+#define TEST(type) std::cerr << "Testing: " #type " (" << boost::core::type_name<type>() << ")\n"; collision_test<type>();
+
+int main()
+{
+#ifndef BOOST_NO_INTRINSIC_WCHAR_T
+    TEST(wchar_t)
+#endif
+#ifndef BOOST_NO_CXX11_CHAR16_T
+    TEST(char16_t)
+#endif
+#ifndef BOOST_NO_CXX11_CHAR32_T
+    TEST(char32_t)
+#endif
+    TEST(short)
+    TEST(unsigned short)
+    TEST(int)
+    TEST(unsigned int)
+    TEST(long)
+    TEST(unsigned long)
+
+#if !defined(BOOST_NO_LONG_LONG)
+    TEST(boost::long_long_type)
+    TEST(boost::ulong_long_type)
+#endif
+
+#if defined(BOOST_HAS_INT128)
+    TEST(boost::int128_type)
+    TEST(boost::uint128_type)
+#endif
+
+    TEST(float)
+    TEST(double)
+    TEST(long double)
+
+    TEST(std::size_t)
+    TEST(std::ptrdiff_t)
+
+    return boost::report_errors();
+}

test/hash_optional_test.cpp

@@ -0,0 +1,70 @@
+
+// Copyright 2018 Daniel James
+// 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 "./config.hpp"
+
+#ifndef BOOST_HASH_TEST_STD_INCLUDES
+#  include <boost/container_hash/hash.hpp>
+#endif
+#include <boost/config.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+#if !defined(BOOST_NO_CXX17_HDR_OPTIONAL)
+
+#include <optional>
+#include <string>
+
+void test_optional_int()
+{
+    std::optional<int> x1a;
+    std::optional<int> x1b;
+    std::optional<int> x2a(10);
+    std::optional<int> x2b(x2a);
+    std::optional<int> x3(20);
+
+    boost::hash<std::optional<int> > hasher;
+
+    BOOST_TEST(hasher(x1a) == hasher(x1a));
+    BOOST_TEST(hasher(x1a) == hasher(x1b));
+    BOOST_TEST(hasher(x1a) != hasher(x2a));
+    BOOST_TEST(hasher(x1a) != hasher(x3));
+    BOOST_TEST(hasher(x2a) == hasher(x2a));
+    BOOST_TEST(hasher(x2b) == hasher(x2b));
+    BOOST_TEST(hasher(x2a) != hasher(x3));
+    BOOST_TEST(hasher(x3) == hasher(x3));
+}
+
+void test_optional_string()
+{
+    std::optional<std::string> x1a;
+    std::optional<std::string> x1b;
+    std::optional<std::string> x2a("10");
+    std::optional<std::string> x2b(x2a);
+    std::optional<std::string> x3("20");
+
+    boost::hash<std::optional<std::string> > hasher;
+
+    BOOST_TEST(hasher(x1a) == hasher(x1a));
+    BOOST_TEST(hasher(x1a) == hasher(x1b));
+    BOOST_TEST(hasher(x1a) != hasher(x2a));
+    BOOST_TEST(hasher(x1a) != hasher(x3));
+    BOOST_TEST(hasher(x2a) == hasher(x2a));
+    BOOST_TEST(hasher(x2b) == hasher(x2b));
+    BOOST_TEST(hasher(x2a) != hasher(x3));
+    BOOST_TEST(hasher(x3) == hasher(x3));
+}
+
+#endif
+
+int main()
+{
+#if !defined(BOOST_NO_CXX17_HDR_OPTIONAL)
+    test_optional_int();
+    test_optional_string();
+#else
+    BOOST_LIGHTWEIGHT_TEST_OSTREAM << "<optional> not available." << std::endl;
+#endif
+    return boost::report_errors();
+}

test/hash_pointer_test.cpp

@@ -5,18 +5,14 @@
 
 #include "./config.hpp"
 
-#ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_STD_INCLUDES
 #  include <functional>
 #else
-#  include <boost/functional/hash.hpp>
+#  include <boost/container_hash/hash.hpp>
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
-
+#include <boost/core/lightweight_test.hpp>
 #include <boost/limits.hpp>
-#include <boost/mpl/assert.hpp>
-#include <boost/type_traits/is_base_and_derived.hpp>
-
 #include "./compile_time.hpp"
 
 void pointer_tests()
@@ -24,8 +20,8 @@ void pointer_tests()
     compile_time_tests((int**) 0);
     compile_time_tests((void**) 0);
 
-    HASH_NAMESPACE::hash<int*> x1;
-    HASH_NAMESPACE::hash<int*> x2;
+    BOOST_HASH_TEST_NAMESPACE::hash<int*> x1;
+    BOOST_HASH_TEST_NAMESPACE::hash<int*> x2;
 
     int int1;
     int int2;
@@ -33,9 +29,9 @@ void pointer_tests()
     BOOST_TEST(x1(0) == x2(0));
     BOOST_TEST(x1(&int1) == x2(&int1));
     BOOST_TEST(x1(&int2) == x2(&int2));
-#if defined(TEST_EXTENSIONS)
-    BOOST_TEST(x1(&int1) == HASH_NAMESPACE::hash_value(&int1));
-    BOOST_TEST(x1(&int2) == HASH_NAMESPACE::hash_value(&int2));
+#if defined(BOOST_HASH_TEST_EXTENSIONS)
+    BOOST_TEST(x1(&int1) == BOOST_HASH_TEST_NAMESPACE::hash_value(&int1));
+    BOOST_TEST(x1(&int2) == BOOST_HASH_TEST_NAMESPACE::hash_value(&int2));
 
     // This isn't specified in Peter's proposal:
     BOOST_TEST(x1(0) == 0);

test/hash_range_test.cpp

@@ -5,23 +5,20 @@
 
 #include "./config.hpp"
 
-#if !defined(TEST_EXTENSIONS)
+#if !defined(BOOST_HASH_TEST_EXTENSIONS)
 
 int main() {}
 
 #else
 
-#ifdef TEST_STD_INCLUDES
+#ifdef BOOST_HASH_TEST_STD_INCLUDES
 #  include <functional>
 #else
-#  include <boost/functional/hash.hpp>
+#  include <boost/container_hash/hash.hpp>
 #endif
 
-#include <boost/detail/lightweight_test.hpp>
-
+#include <boost/core/lightweight_test.hpp>
 #include <boost/limits.hpp>
-#include <boost/mpl/assert.hpp>
-#include <boost/type_traits/is_base_and_derived.hpp>
 #include <vector>
 
 void hash_range_tests()
@@ -43,39 +40,39 @@ void hash_range_tests()
     std::vector<int> x;
 
     std::size_t x_seed = 0;
-    BOOST_TEST(x_seed == HASH_NAMESPACE::hash_range(x.begin(), x.end()));
+    BOOST_TEST(x_seed == BOOST_HASH_TEST_NAMESPACE::hash_range(x.begin(), x.end()));
 
-    BOOST_TEST(HASH_NAMESPACE::hash_range(empty.begin(), empty.end())
-        == HASH_NAMESPACE::hash_range(x.begin(), x.end()));
-    BOOST_TEST(HASH_NAMESPACE::hash_range(empty.begin(), empty.end())
-        != HASH_NAMESPACE::hash_range(values1.begin(), values1.end()));
+    BOOST_TEST(BOOST_HASH_TEST_NAMESPACE::hash_range(empty.begin(), empty.end())
+        == BOOST_HASH_TEST_NAMESPACE::hash_range(x.begin(), x.end()));
+    BOOST_TEST(BOOST_HASH_TEST_NAMESPACE::hash_range(empty.begin(), empty.end())
+        != BOOST_HASH_TEST_NAMESPACE::hash_range(values1.begin(), values1.end()));
 
     x.push_back(10);
-    HASH_NAMESPACE::hash_combine(x_seed, 10);
-    BOOST_TEST(x_seed == HASH_NAMESPACE::hash_range(x.begin(), x.end()));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(x_seed, 10);
+    BOOST_TEST(x_seed == BOOST_HASH_TEST_NAMESPACE::hash_range(x.begin(), x.end()));
 
-    BOOST_TEST(HASH_NAMESPACE::hash_range(empty.begin(), empty.end())
-        != HASH_NAMESPACE::hash_range(x.begin(), x.end()));
-    BOOST_TEST(HASH_NAMESPACE::hash_range(values2.begin(), values2.end())
-        == HASH_NAMESPACE::hash_range(x.begin(), x.end()));
+    BOOST_TEST(BOOST_HASH_TEST_NAMESPACE::hash_range(empty.begin(), empty.end())
+        != BOOST_HASH_TEST_NAMESPACE::hash_range(x.begin(), x.end()));
+    BOOST_TEST(BOOST_HASH_TEST_NAMESPACE::hash_range(values2.begin(), values2.end())
+        == BOOST_HASH_TEST_NAMESPACE::hash_range(x.begin(), x.end()));
 
     x.push_back(20);
-    HASH_NAMESPACE::hash_combine(x_seed, 20);
-    BOOST_TEST(x_seed == HASH_NAMESPACE::hash_range(x.begin(), x.end()));
+    BOOST_HASH_TEST_NAMESPACE::hash_combine(x_seed, 20);
+    BOOST_TEST(x_seed == BOOST_HASH_TEST_NAMESPACE::hash_range(x.begin(), x.end()));
 
-    BOOST_TEST(HASH_NAMESPACE::hash_range(empty.begin(), empty.end())
-        != HASH_NAMESPACE::hash_range(x.begin(), x.end()));
-    BOOST_TEST(HASH_NAMESPACE::hash_range(values2.begin(), values2.end())
-        != HASH_NAMESPACE::hash_range(x.begin(), x.end()));
-    BOOST_TEST(HASH_NAMESPACE::hash_range(values3.begin(), values3.end())
-        == HASH_NAMESPACE::hash_range(x.begin(), x.end()));
+    BOOST_TEST(BOOST_HASH_TEST_NAMESPACE::hash_range(empty.begin(), empty.end())
+        != BOOST_HASH_TEST_NAMESPACE::hash_range(x.begin(), x.end()));
+    BOOST_TEST(BOOST_HASH_TEST_NAMESPACE::hash_range(values2.begin(), values2.end())
+        != BOOST_HASH_TEST_NAMESPACE::hash_range(x.begin(), x.end()));
+    BOOST_TEST(BOOST_HASH_TEST_NAMESPACE::hash_range(values3.begin(), values3.end())
+        == BOOST_HASH_TEST_NAMESPACE::hash_range(x.begin(), x.end()));
 
     std::size_t seed =
-        HASH_NAMESPACE::hash_range(values3.begin(), values3.end());
-    HASH_NAMESPACE::hash_range(seed, values4.begin(), values4.end());
-    HASH_NAMESPACE::hash_range(seed, x.begin(), x.end());
+        BOOST_HASH_TEST_NAMESPACE::hash_range(values3.begin(), values3.end());
+    BOOST_HASH_TEST_NAMESPACE::hash_range(seed, values4.begin(), values4.end());
+    BOOST_HASH_TEST_NAMESPACE::hash_range(seed, x.begin(), x.end());
     BOOST_TEST(seed ==
-        HASH_NAMESPACE::hash_range(values5.begin(), values5.end()));
+        BOOST_HASH_TEST_NAMESPACE::hash_range(values5.begin(), values5.end()));
 }
 
 int main()