Add support for modular build structure. (#274 )

* Make the library modular usable. * Switch to library requirements instead of source. As source puts extra source in install targets. * Add missing import-search for cconfig/predef checks. * Add requires-b2 check to top-level build file. * Bump B2 require to 5.2 * Change all <source> references to <library>. * Update copyright dates. * Move inter-lib dependencies to a project variable and into the build targets. * Update build deps.
Correct include guards in headers adapt_assoc_adt.hpp and pp_make_deque.hpp (#277 )
2025-06-28 21:30:59 +02:00 · 2024-08-22 09:51:29 +08:00 · 2024-07-29 10:19:50 +08:00 · 2024-02-25 12:37:08 +08:00 · 2023-03-18 16:31:22 +08:00 · 2023-02-28 07:29:50 +08:00
824 changed files with 4186 additions and 1686 deletions
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@ -0,0 +1,471 @@
+name: GitHub Actions CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+      - develop
+      - githubactions*
+      - feature/**
+      - fix/**
+      - pr/**
+
+jobs:
+  posix:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: "TOOLSET=gcc-4.4 CXXSTD=98,0x Job 0"
+            buildtype: "boost"
+            packages: "g++-4.4"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "gcc-4.4"
+            cxxstd: "98,0x"
+          - name: "TOOLSET=gcc-4.6 CXXSTD=03,0x Job 1"
+            buildtype: "boost"
+            packages: "g++-4.6"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "gcc-4.6"
+            cxxstd: "03,0x"
+          - name: "TOOLSET=gcc-4.7 CXXSTD=03,11 Job 2"
+            buildtype: "boost"
+            packages: "g++-4.7"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "gcc-4.7"
+            cxxstd: "03,11"
+          - name: "TOOLSET=gcc-4.8 CXXSTD=03,11,1y Job 3"
+            buildtype: "boost"
+            packages: "g++-4.8"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "gcc-4.8"
+            cxxstd: "03,11,1y"
+          - name: "TOOLSET=gcc-4.9 CXXSTD=03,11,14 Job 4"
+            buildtype: "boost"
+            packages: "g++-4.9"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "gcc-4.9"
+            cxxstd: "03,11,14"
+          - name: "TOOLSET=gcc-5 CXXSTD=03,11,14,17 Job 5"
+            buildtype: "boost"
+            packages: "g++-5"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "gcc-5"
+            cxxstd: "03,11,14,17"
+          - name: "TOOLSET=gcc-6 CXXSTD=03,11,14,17 Job 6"
+            buildtype: "boost"
+            packages: "g++-6"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "gcc-6"
+            cxxstd: "03,11,14,17"
+          - name: "TOOLSET=gcc-7 CXXSTD=03,11,14,17 Job 7"
+            buildtype: "boost"
+            packages: "g++-7"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "gcc-7"
+            cxxstd: "03,11,14,17"
+          - name: "TOOLSET=gcc-8 CXXSTD=03,11,14,17,2a Job 8"
+            buildtype: "boost"
+            packages: "g++-8"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "gcc-8"
+            cxxstd: "03,11,14,17,2a"
+          - name: "TOOLSET=clang-3.5 CXXSTD=03,11,14,1z Job 9"
+            buildtype: "boost"
+            packages: "clang-3.5"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "clang-3.5"
+            cxxstd: "03,11,14"
+          - name: "TOOLSET=clang-3.6 CXXSTD=03,11,14,1z Job 10"
+            buildtype: "boost"
+            packages: "clang-3.6"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "clang-3.6"
+            cxxstd: "03,11,14"
+          - name: "TOOLSET=clang-3.7 CXXSTD=03,11,14,1z Job 11"
+            buildtype: "boost"
+            packages: "clang-3.7"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "clang-3.7"
+            cxxstd: "03,11,14"
+          - name: "TOOLSET=clang-3.8 CXXSTD=03,11,14,1z Job 12"
+            buildtype: "boost"
+            packages: "clang-3.8"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "clang-3.8"
+            cxxstd: "03,11,14"
+          - name: "TOOLSET=clang-3.9 CXXSTD=03,11,14,1z Job 13"
+            buildtype: "boost"
+            packages: "clang-3.9"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "clang-3.9"
+            cxxstd: "03,11,14"
+          - name: "TOOLSET=clang-4.0 CXXSTD=03,11,14,1z Job 14"
+            buildtype: "boost"
+            packages: "clang-4.0"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            toolset: "clang-4.0"
+            cxxstd: "03,11,14"
+          - name: "TOOLSET=clang-5.0 CXXSTD=03,11,14,17,2a Job 15"
+            buildtype: "boost"
+            packages: "clang-5.0"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: "xenial"
+            llvm_ver: "5.0"
+            toolset: "clang-5.0"
+            cxxstd: "03,11,14,17,2a"
+          - name: "TOOLSET=clang-6.0 CXXSTD=03,11,14,17,2a Job 16"
+            buildtype: "boost"
+            packages: "clang-6.0"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: "xenial"
+            llvm_ver: "6.0"
+            toolset: "clang-6.0"
+            cxxstd: "03,11,14,17,2a"
+          - name: "TOOLSET=clang-7 CXXSTD=03,11,14,17,2a Job 17"
+            buildtype: "boost"
+            packages: "clang-7"
+            packages_to_remove: ""
+            os: "ubuntu-20.04"
+            container: "ubuntu:16.04"
+            cxx: "g++"
+            sources: ""
+            llvm_os: "xenial"
+            llvm_ver: "7"
+            toolset: "clang-7"
+            cxxstd: "03,11,14,17,2a"
+
+    runs-on: ${{ matrix.os }}
+    container: ${{ matrix.container }}
+
+    steps:
+      - name: Check if running in container
+        if: matrix.container != ''
+        run: echo "GHA_CONTAINER=${{ matrix.container }}" >> $GITHUB_ENV
+      - name: If running in container, upgrade packages
+        if: matrix.container != ''
+        run: |
+            apt-get -o Acquire::Retries=3 update && DEBIAN_FRONTEND=noninteractive apt-get -y install tzdata && apt-get -o Acquire::Retries=3 install -y sudo software-properties-common wget curl apt-transport-https make apt-file sudo unzip libssl-dev build-essential autotools-dev autoconf automake g++ libc++-helpers python ruby cpio gcc-multilib g++-multilib pkgconf python3 ccache libpython-dev
+            sudo apt-add-repository ppa:git-core/ppa
+            sudo apt-get -o Acquire::Retries=3 update && apt-get -o Acquire::Retries=3 -y install git
+            python_version=$(python3 -c 'import sys; print("{0.major}.{0.minor}".format(sys.version_info))')
+            sudo wget https://bootstrap.pypa.io/pip/$python_version/get-pip.py
+            sudo python3 get-pip.py
+            sudo /usr/local/bin/pip install cmake
+
+      - uses: actions/checkout@v2
+
+      - name: linux
+        shell: bash
+        env:
+          CXX: ${{ matrix.cxx }}
+          SOURCES: ${{ matrix.sources }}
+          LLVM_OS: ${{ matrix.llvm_os }}
+          LLVM_VER: ${{ matrix.llvm_ver }}
+          PACKAGES: ${{ matrix.packages }}
+          PACKAGES_TO_REMOVE: ${{ matrix.packages_to_remove }}
+          JOB_BUILDTYPE: ${{ matrix.buildtype }}
+          TOOLSET: ${{ matrix.toolset }}
+          CXXSTD: ${{ matrix.cxxstd }}
+          COMPILER: ${{ matrix.compiler }}
+          TRAVIS_BRANCH: ${{ github.base_ref }}
+          TRAVIS_OS_NAME: "linux"
+        run: |
+          echo '==================================> SETUP'
+          echo '==================================> PACKAGES'
+          set -e
+          if [ -n "$PACKAGES_TO_REMOVE" ]; then sudo apt-get purge -y $PACKAGES_TO_REMOVE; fi
+          echo ">>>>> APT: REPO.."
+          for i in {1..3}; do sudo -E apt-add-repository -y "ppa:ubuntu-toolchain-r/test" && break || sleep 2; done
+          
+          if test -n "${LLVM_OS}" ; then
+              wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
+              if test -n "${LLVM_VER}" ; then
+                  sudo -E apt-add-repository "deb http://apt.llvm.org/${LLVM_OS}/ llvm-toolchain-${LLVM_OS}-${LLVM_VER} main"
+              else
+                  # Snapshot (i.e. trunk) build of clang
+                  sudo -E apt-add-repository "deb http://apt.llvm.org/${LLVM_OS}/ llvm-toolchain-${LLVM_OS} main"
+              fi
+          fi
+          echo ">>>>> APT: UPDATE.."
+          sudo -E apt-get -o Acquire::Retries=3 update
+          if test -n "${SOURCES}" ; then
+              echo ">>>>> APT: INSTALL SOURCES.."
+              for SOURCE in $SOURCES; do
+                  sudo -E apt-add-repository ppa:$SOURCE
+              done
+          fi
+          echo ">>>>> APT: INSTALL ${PACKAGES}.."
+          sudo -E DEBIAN_FRONTEND=noninteractive apt-get -o Acquire::Retries=3 -y --no-install-suggests --no-install-recommends install ${PACKAGES}
+
+          echo '==================================> INSTALL AND COMPILE'
+          set -e
+          export TRAVIS_BUILD_DIR=$(pwd)
+          export TRAVIS_BRANCH=${TRAVIS_BRANCH:-$(echo $GITHUB_REF | awk 'BEGIN { FS = "/" } ; { print $3 }')}
+          export VCS_COMMIT_ID=$GITHUB_SHA
+          export GIT_COMMIT=$GITHUB_SHA
+          export REPO_NAME=$(basename $GITHUB_REPOSITORY)
+          export USER=$(whoami)
+          export CC=${CC:-gcc}
+          export PATH=~/.local/bin:/usr/local/bin:$PATH
+
+          if [ "$JOB_BUILDTYPE" == "boost" ]; then
+
+          echo '==================================> INSTALL'
+
+          BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
+          cd ..
+          git clone --depth 1 -b $BOOST_BRANCH https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          git submodule init libs/array
+          git submodule init libs/assert
+          git submodule init libs/bind
+          git submodule init libs/concept_check
+          git submodule init libs/config
+          git submodule init libs/container_hash
+          git submodule init libs/conversion
+          git submodule init libs/core
+          git submodule init libs/detail
+          git submodule init libs/function
+          git submodule init libs/function_types
+          git submodule init libs/functional
+          git submodule init libs/integer
+          git submodule init libs/iterator
+          git submodule init libs/lambda
+          git submodule init libs/move
+          git submodule init libs/mpl
+          git submodule init libs/optional
+          git submodule init libs/predef
+          git submodule init libs/preprocessor
+          git submodule init libs/smart_ptr
+          git submodule init libs/static_assert
+          git submodule init libs/throw_exception
+          git submodule init libs/tuple
+          git submodule init libs/type_index
+          git submodule init libs/type_traits
+          git submodule init libs/typeof
+          git submodule init libs/utility
+          git submodule init libs/describe
+          git submodule init libs/mp11
+          git submodule init libs/headers tools/boost_install tools/build
+          git submodule update
+          rm -rf libs/fusion
+          cp -rp $TRAVIS_BUILD_DIR libs/fusion
+          ln -s $(pwd)/libs/fusion $TRAVIS_BUILD_DIR
+          ./bootstrap.sh
+          ./b2 headers
+
+          echo '==================================> SCRIPT'
+
+          ./b2 -j`(nproc || sysctl -n hw.ncpu) 2> /dev/null` libs/fusion/test toolset=$TOOLSET cxxstd=$CXXSTD
+
+          fi
+  osx:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - name: "TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,1 Job 18"
+            buildtype: "boost"
+            packages: ""
+            os: "macos-10.15"
+            cxx: "clang++"
+            sources: ""
+            llvm_os: ""
+            llvm_ver: ""
+            xcode_version: 11.7
+            toolset: "clang"
+            compiler: "clang++"
+            cxxstd: "03,11,14,1z"
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Set DEVELOPER_DIR
+        if: matrix.xcode_version != ''
+        run: echo "DEVELOPER_DIR=/Applications/Xcode_${{ matrix.xcode_version }}.app/Contents/Developer" >> $GITHUB_ENV
+      - name: Test DEVELOPER_DIR
+        run: echo $DEVELOPER_DIR
+
+      - name: "osx"
+        shell: bash
+        env:
+          CXX: ${{ matrix.cxx }}
+          SOURCES: ${{ matrix.sources }}
+          LLVM_OS: ${{ matrix.llvm_os }}
+          LLVM_VER: ${{ matrix.llvm_ver }}
+          PACKAGES: ${{ matrix.packages }}
+          JOB_BUILDTYPE: ${{ matrix.buildtype }}
+          TOOLSET: ${{ matrix.toolset }}
+          CXXSTD: ${{ matrix.cxxstd }}
+          COMPILER: ${{ matrix.compiler }}
+          TRAVIS_BRANCH: ${{ github.base_ref }}
+          TRAVIS_OS_NAME: "osx"
+        run: |
+          echo '==================================> SETUP'
+          set -e
+          sudo mv /Library/Developer/CommandLineTools /Library/Developer/CommandLineTools.bck
+          echo '==================================> PACKAGES'
+          echo '==================================> INSTALL AND COMPILE'
+          set -e
+          export TRAVIS_BUILD_DIR=$(pwd)
+          export TRAVIS_BRANCH=${TRAVIS_BRANCH:-$(echo $GITHUB_REF | awk 'BEGIN { FS = "/" } ; { print $3 }')}
+          export VCS_COMMIT_ID=$GITHUB_SHA
+          export GIT_COMMIT=$GITHUB_SHA
+          export REPO_NAME=$(basename $GITHUB_REPOSITORY)
+          export USER=$(whoami)
+          export CC=${CC:-gcc}
+          export PATH=~/.local/bin:/usr/local/bin:$PATH
+
+          if [ "$JOB_BUILDTYPE" == "boost" ]; then
+
+          echo '==================================> INSTALL'
+
+          BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
+          cd ..
+          git clone --depth 1 -b $BOOST_BRANCH https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          git submodule init libs/array
+          git submodule init libs/assert
+          git submodule init libs/bind
+          git submodule init libs/concept_check
+          git submodule init libs/config
+          git submodule init libs/container_hash
+          git submodule init libs/conversion
+          git submodule init libs/core
+          git submodule init libs/detail
+          git submodule init libs/function
+          git submodule init libs/function_types
+          git submodule init libs/functional
+          git submodule init libs/integer
+          git submodule init libs/iterator
+          git submodule init libs/lambda
+          git submodule init libs/move
+          git submodule init libs/mpl
+          git submodule init libs/optional
+          git submodule init libs/predef
+          git submodule init libs/preprocessor
+          git submodule init libs/smart_ptr
+          git submodule init libs/static_assert
+          git submodule init libs/throw_exception
+          git submodule init libs/tuple
+          git submodule init libs/type_index
+          git submodule init libs/type_traits
+          git submodule init libs/typeof
+          git submodule init libs/utility
+          git submodule init libs/describe
+          git submodule init libs/mp11
+          git submodule init libs/headers tools/boost_install tools/build
+          git submodule update
+          rm -rf libs/fusion
+          cp -rp $TRAVIS_BUILD_DIR libs/fusion
+          ln -s $(pwd)/libs/fusion $TRAVIS_BUILD_DIR
+          ./bootstrap.sh
+          ./b2 headers
+
+          echo '==================================> SCRIPT'
+
+          ./b2 -j`(nproc || sysctl -n hw.ncpu) 2> /dev/null` libs/fusion/test toolset=$TOOLSET cxxstd=$CXXSTD
+
+          fi
--- a/.travis.yml
+++ b/.travis.yml
@ -0,0 +1,251 @@
+# Copyright 2016, 2017 Peter Dimov
+# Copyright 2017-2018 Kohei Takahashi
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
+
+language: cpp
+
+sudo: false
+
+os:
+  - linux
+  - osx
+
+env:
+  matrix:
+    - BOGUS_JOB=true
+
+matrix:
+
+  exclude:
+    - env: BOGUS_JOB=true
+
+  include:
+    - os: linux
+      dist: xenial
+      env: TOOLSET=gcc-4.4 CXXSTD=98,0x
+      addons:
+        apt:
+          packages:
+            - g++-4.4
+          sources:
+            - ubuntu-toolchain-r-test
+
+    #- os: linux
+    #  dist: xenial
+    #  env: TOOLSET=gcc-4.5 CXXSTD=03,0x
+    #  addons:
+    #    apt:
+    #      packages:
+    #        - g++-4.5
+    #      sources:
+    #        - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=gcc-4.6 CXXSTD=03,0x
+      addons:
+        apt:
+          packages:
+            - g++-4.6
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=gcc-4.7 CXXSTD=03,11
+      addons:
+        apt:
+          packages:
+            - g++-4.7
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=gcc-4.8 CXXSTD=03,11,1y
+      addons:
+        apt:
+          packages:
+            - g++-4.8
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=gcc-4.9 CXXSTD=03,11,14
+      addons:
+        apt:
+          packages:
+            - g++-4.9
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=gcc-5 CXXSTD=03,11,14,17
+      addons:
+        apt:
+          packages:
+            - g++-5
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=gcc-6 CXXSTD=03,11,14,17
+      addons:
+        apt:
+          packages:
+            - g++-6
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=gcc-7 CXXSTD=03,11,14,17
+      addons:
+        apt:
+          packages:
+            - g++-7
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=gcc-8 CXXSTD=03,11,14,17,2a
+      addons:
+        apt:
+          packages:
+            - g++-8
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=clang-3.5 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-3.5
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=clang-3.6 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-3.6
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=clang-3.7 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-3.7
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=clang-3.8 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-3.8
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=clang-3.9 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-3.9
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=clang-4.0 CXXSTD=03,11,14,1z
+      addons:
+        apt:
+          packages:
+            - clang-4.0
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=clang-5.0 CXXSTD=03,11,14,17,2a
+      addons:
+        apt:
+          packages:
+            - clang-5.0
+          sources:
+            - llvm-toolchain-xenial-5.0
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=clang-6.0 CXXSTD=03,11,14,17,2a
+      addons:
+        apt:
+          packages:
+            - clang-6.0
+          sources:
+            - llvm-toolchain-xenial-6.0
+
+    - os: linux
+      dist: xenial
+      env: TOOLSET=clang-7.0 CXXSTD=03,11,14,17,2a
+      addons:
+        apt:
+          packages:
+            - clang-7
+          sources:
+            - llvm-toolchain-xenial-7
+
+    - os: osx
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
+
+install:
+  - BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
+  - cd ..
+  - git clone --depth 1 -b $BOOST_BRANCH https://github.com/boostorg/boost.git boost-root
+  - cd boost-root
+
+  - git submodule init libs/array
+  - git submodule init libs/assert
+  - git submodule init libs/bind
+  - git submodule init libs/concept_check
+  - git submodule init libs/config
+  - git submodule init libs/container_hash
+  - git submodule init libs/conversion
+  - git submodule init libs/core
+  - git submodule init libs/detail
+  - git submodule init libs/function
+  - git submodule init libs/function_types
+  - git submodule init libs/functional
+  - git submodule init libs/integer
+  - git submodule init libs/iterator
+  - git submodule init libs/lambda
+  - git submodule init libs/move
+  - git submodule init libs/mpl
+  - git submodule init libs/optional
+  - git submodule init libs/predef
+  - git submodule init libs/preprocessor
+  - git submodule init libs/smart_ptr
+  - git submodule init libs/static_assert
+  - git submodule init libs/throw_exception
+  - git submodule init libs/tuple
+  - git submodule init libs/type_index
+  - git submodule init libs/type_traits
+  - git submodule init libs/typeof
+  - git submodule init libs/utility
+
+  - git submodule init libs/headers tools/boost_install tools/build
+  - git submodule update
+
+  - rm -rf libs/fusion
+  - mv $TRAVIS_BUILD_DIR libs/fusion
+  - ln -s $(pwd)/libs/fusion $TRAVIS_BUILD_DIR
+
+  - ./bootstrap.sh
+  - ./b2 headers
+
+script:
+  - ./b2 -j`(nproc || sysctl -n hw.ncpu) 2> /dev/null` libs/fusion/test toolset=$TOOLSET cxxstd=$CXXSTD
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -0,0 +1,29 @@
+# Copyright 2018 Mike Dev
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
+
+cmake_minimum_required(VERSION 3.5...3.20)
+project(boost_fusion VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX)
+
+add_library(boost_fusion INTERFACE)
+add_library(Boost::fusion ALIAS boost_fusion)
+
+target_include_directories(boost_fusion INTERFACE include)
+
+target_link_libraries(boost_fusion
+    INTERFACE
+        Boost::config
+        Boost::container_hash
+        Boost::core
+        Boost::function_types
+        Boost::mpl
+        Boost::preprocessor
+        Boost::static_assert
+        Boost::tuple
+        Boost::type_traits
+        Boost::typeof
+        Boost::utility
+        Boost::functional
+        Boost::describe
+        Boost::mp11
+)
--- a/appveyor.yml
+++ b/appveyor.yml
@ -0,0 +1,98 @@
+# Copyright 2016, 2017 Peter Dimov
+# Copyright 2017-2018 Kohei Takahashi
+# 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
+
+environment:
+  matrix:
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-9.0
+      ADDRMD: 32
+      CXXSTD: latest # fake
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-10.0
+      ADDRMD: 32
+      CXXSTD: latest # fake
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-11.0
+      ADDRMD: 32
+      CXXSTD: latest # fake
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-12.0
+      ADDRMD: 32
+      CXXSTD: latest # fake
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-14.0
+      CXXSTD: 14
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
+      TOOLSET: msvc-14.0
+      CXXSTD: latest
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: msvc-14.1
+      CXXSTD: 14
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: msvc-14.1
+      CXXSTD: 17
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: msvc-14.1
+      CXXSTD: latest
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: clang-win
+      CXXSTD: 14
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
+      TOOLSET: clang-win
+      CXXSTD: 17
+
+install:
+  - set BOOST_BRANCH=develop
+  - if "%APPVEYOR_REPO_BRANCH%" == "master" set BOOST_BRANCH=master
+  - cd ..
+  - git clone --depth 1 -b %BOOST_BRANCH% https://github.com/boostorg/boost.git boost-root
+  - cd boost-root
+
+  - git submodule init libs/array
+  - git submodule init libs/assert
+  - git submodule init libs/bind
+  - git submodule init libs/concept_check
+  - git submodule init libs/config
+  - git submodule init libs/container_hash
+  - git submodule init libs/conversion
+  - git submodule init libs/core
+  - git submodule init libs/detail
+  - git submodule init libs/function
+  - git submodule init libs/function_types
+  - git submodule init libs/functional
+  - git submodule init libs/integer
+  - git submodule init libs/iterator
+  - git submodule init libs/lambda
+  - git submodule init libs/move
+  - git submodule init libs/mpl
+  - git submodule init libs/optional
+  - git submodule init libs/predef
+  - git submodule init libs/preprocessor
+  - git submodule init libs/smart_ptr
+  - git submodule init libs/static_assert
+  - git submodule init libs/throw_exception
+  - git submodule init libs/tuple
+  - git submodule init libs/type_index
+  - git submodule init libs/type_traits
+  - git submodule init libs/typeof
+  - git submodule init libs/utility
+  - git submodule init libs/describe
+  - git submodule init libs/mp11
+
+  - git submodule init libs/headers tools/boost_install tools/build
+  - git submodule update
+  - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\fusion
+  - cmd /c bootstrap
+  - b2 headers
+
+build: off
+
+test_script:
+  - if not "%ADDRMD%" == "" set ADDRMD=address-model=%ADDRMD%
+  - b2 -j%NUMBER_OF_PROCESSORS% --hash libs/fusion/test toolset=%TOOLSET% cxxstd=%CXXSTD% %ADDRMD%
--- a/build.jam
+++ b/build.jam
@ -0,0 +1,34 @@
+# Copyright René Ferdinand Rivera Morell 2023-2024
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+require-b2 5.2 ;
+
+constant boost_dependencies :
+    /boost/config//boost_config
+    /boost/container_hash//boost_container_hash
+    /boost/core//boost_core
+    /boost/function_types//boost_function_types
+    /boost/functional//boost_functional
+    /boost/mpl//boost_mpl
+    /boost/preprocessor//boost_preprocessor
+    /boost/static_assert//boost_static_assert
+    /boost/tuple//boost_tuple
+    /boost/type_traits//boost_type_traits
+    /boost/typeof//boost_typeof
+    /boost/utility//boost_utility ;
+
+project /boost/fusion
+    : common-requirements
+        <include>include
+    ;
+
+explicit
+    [ alias boost_fusion : : : : <library>$(boost_dependencies) ]
+    [ alias all : boost_fusion test ]
+    ;
+
+call-if : boost-library fusion
+    ;
+
--- a/doc/adapted.qbk
+++ b/doc/adapted.qbk
@ -23,19 +23,6 @@ various data structures, non-intrusively, as full fledged Fusion sequences.
    #include <boost/fusion/adapted.hpp>
    #include <boost/fusion/include/adapted.hpp>

-Fusion sequences may also be adapted as fully conforming __mpl__ sequences (see
-__intrinsics__). That way, we can have 2-way adaptation to and from __mpl__ and
-Fusion. To make Fusion sequences fully conforming __mpl__ sequences, include:
-
-    #include <boost/fusion/mpl.hpp>
-
-If you want bi-directional adaptation to and from __mpl__ and Fusion, simply
-include:
-
-    #include <boost/fusion/include/mpl.hpp>
-
-The header includes all the necessary headers.
-
 [section:array Array]

 This module provides adapters for arrays. Including the module
@ -145,6 +132,21 @@ header makes all __mpl__ sequences fully conforming fusion sequences.
    std::cout << __at_c__<0>(v) << std::endl;
    std::cout << __at_c__<1>(v) << std::endl;

+[heading Bi-directional adaptation]
+
+Fusion sequences may also be adapted as fully conforming __mpl__ sequences (see
+__intrinsics__). That way, we can have 2-way adaptation to and from __mpl__ and
+Fusion. To make Fusion sequences fully conforming __mpl__ sequences, include:
+
+    #include <boost/fusion/mpl.hpp>
+
+If you want bi-directional adaptation to and from __mpl__ and Fusion, simply
+include:
+
+    #include <boost/fusion/include/mpl.hpp>
+
+The header includes all the necessary headers.
+
 [heading See also]

 __mpl__
--- a/doc/container.qbk
+++ b/doc/container.qbk
@ -1016,8 +1016,8 @@ __note_ref_wrappers__, __fusion_pair__

 [section Tiers]

-Tiers are sequences, where all elements are non-const reference types. They
-are constructed with a call to a couple of /tie/ function templates. The
+Tiers are sequences, where all elements are reference types. They are
+constructed with a call to a couple of /tie/ function templates. The
 succeeding sections document the various /tier/ flavors.

 * __list_tie__
@ -2005,7 +2005,7 @@ __fusion_pair__s. There may be no duplicate __fusion_pair__ key types.
    as_map(__make_vector__(
        __fusion_make_pair__<int>('X')
      , __fusion_make_pair__<double>("Men")))
-    
+
    // from associative sequence
    namespace ns
    {
@ -2222,7 +2222,7 @@ __fusion_pair__s. There may be no duplicate __fusion_pair__ key types.
    result_of::as_map<__vector__<
        __fusion_pair__<int, char>
      , __fusion_pair__<double, std::string> > >::type
-    
+
    // from associative sequence
    namespace ns
    {
--- a/doc/fusion.qbk
+++ b/doc/fusion.qbk
@ -2,6 +2,7 @@
    Copyright (C) 2001-2011 Joel de Guzman
    Copyright (C) 2006 Dan Marsden
    Copyright (C) 2010 Christopher Schmidt
+    Copyright (C) 2018 Kohei Takahashi

    Use, modification and distribution is subject to the Boost Software
    License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@ -20,39 +21,37 @@
    ]
 ]

-[def __spirit__                 [@http://spirit.sourceforge.net Spirit]]
-[def __phoenix__                [@http://www.boost.org/libs/phoenix/index.html Phoenix]]
-[def __mpl__                    [@http://www.boost.org/libs/mpl/index.html MPL]]
+[def __spirit__                 [@http://boost-spirit.com/home/ Spirit]]
+[def __phoenix__                [@http://www.boost.org/libs/phoenix Phoenix]]
+[def __mpl__                    [@http://www.boost.org/libs/mpl MPL]]
 [def __stl__                    [@http://en.wikipedia.org/wiki/Standard_Template_Library STL]]
-[def __tuple__                  [@http://www.boost.org/libs/tuple/doc/tuple_users_guide.html Boost.Tuple]]
+[def __tuple__                  [@http://www.boost.org/libs/tuple Boost.Tuple]]
 [def __tr1__tuple__             [@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2002/n1403.pdf TR1 Tuple]]
 [def __boost_tools__            [@http://www.boost.org/tools/index.html Boost Tools]]
-[def __spirit_list__            [@https://lists.sourceforge.net/lists/listinfo/spirit-general Spirit Mailing List]]
-[def __spirit_general__         [@news://news.gmane.org/gmane.comp.spirit.general Spirit General NNTP news portal]]
-[def __gmane__                  [@http://www.gmane.org Gmane]]
-[def __mlist_archive__          [@http://news.gmane.org/gmane.comp.parsers.spirit.general]]
+[def __spirit_list__            [@https://sourceforge.net/projects/spirit/lists/spirit-general Spirit Mailing List]]
+[def __list_archive__           [@https://sourceforge.net/p/spirit/mailman/spirit-general/ archive]]
 [def __jaakko_jarvi__           [@http://www.boost.org/people/jaakko_jarvi.htm Jaakko Jarvi]]
 [def __david_abrahams__         [@http://www.boost.org/people/dave_abrahams.htm David Abrahams]]
 [def __the_forwarding_problem__ [@http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2002/n1385.htm The Forwarding Problem]]

-[def __boost_any__              [@http://www.boost.org/doc/html/any.html Boost.Any]]
+[def __boost_any__              [@http://www.boost.org/libs/any Boost.Any Library]]
 [def __new_iterator_concepts__  [@http://www.boost.org/libs/iterator/doc/new-iter-concepts.html New Iterator Concepts]]
-[def __boost_array_library__    [@http://www.boost.org/doc/html/array.html Boost.Array Library]]
-[def __boost_variant_library__  [@http://www.boost.org/doc/html/variant.html Boost.Variant Library]]
-[def __boost_tuple_library__    [@http://www.boost.org/libs/tuple/doc/tuple_users_guide.html Boost.Tuple Library]]
-[def __boost_ref__              [@http://www.boost.org/doc/html/ref.html Boost.Ref]]
-[def __boost_ref_call__         [@http://www.boost.org/doc/html/ref.html `ref`]]
-[def __boost_result_of__        [@http://www.boost.org/libs/utility/utility.htm#result_of Boost.ResultOf]]
+[def __boost_array_library__    [@http://www.boost.org/libs/array Boost.Array Library]]
+[def __boost_variant_library__  [@http://www.boost.org/libs/variant Boost.Variant Library]]
+[def __boost_tuple_library__    [@http://www.boost.org/libs/tuple Boost.Tuple Library]]
+[def __boost_ref__              [@http://www.boost.org/libs/core/ref.html Ref utility]]
+[def __boost_ref_call__         [@http://www.boost.org/libs/core/ref.html `ref`]]
+[def __boost_result_of__        [@http://www.boost.org/libs/utility/utility.htm#result_of ResultOf utility]]
 [def __boost_result_of_call__   [@http://www.boost.org/libs/utility/utility.htm#result_of `boost::result_of`]]
-[def __boost_enable_if__        [@http://www.boost.org/libs/utility/enable_if.html Boost.EnableIf utility]]
-[def __boost_shared_ptr_call__  [@http://www.boost.org/libs/smart_ptr/shared_ptr.htm `boost::shared_ptr`]]
-[def __boost_func_forward__     [@http://www.boost.org/libs/functional/forward/doc/html/index.html Boost.Functional/Forward]]
-[def __boost_func_factory__     [@http://www.boost.org/libs/functional/factory/doc/html/index.html Boost.Functional/Factory]]
-[def __boost_func_hash__        [@http://www.boost.org/doc/html/hash.html Boost.Functional/Hash]]
-[def __std_pair_doc__           [@http://www.sgi.com/tech/stl/pair.html `std::pair`]]
+[def __boost_enable_if__        [@http://www.boost.org/libs/core/doc/html/core/enable_if.html EnableIf utility]]
+[def __boost_shared_ptr_call__  [@http://www.boost.org/libs/smart_ptr#shared_ptr `boost::shared_ptr`]]
+[def __boost_func_forward__     [@http://www.boost.org/libs/functional/forward Boost.Functional/Forward Library]]
+[def __boost_func_factory__     [@http://www.boost.org/libs/functional/factory Boost.Functional/Factory Library]]
+[def __boost_func_hash__        [@http://www.boost.org/doc/html/hash.html Boost.ContainerHash Library]]
+[def __std_pair_doc__           [@http://en.cppreference.com/w/cpp/utility/pair `std::pair`]]
 [def __std_tuple_doc__          [@http://en.cppreference.com/w/cpp/utility/tuple `std::tuple`]]
-[def __std_plus_doc__           [@http://www.sgi.com/tech/stl/plus.html `std::plus`]]
-[def __std_minus_doc__          [@http://www.sgi.com/tech/stl/minus.html `std::minus`]]
+[def __std_plus_doc__           [@http://en.cppreference.com/w/cpp/utility/functional/plus `std::plus`]]
+[def __std_minus_doc__          [@http://en.cppreference.com/w/cpp/utility/functional/minus `std::minus`]]

 [def __mpl_integral_constant__  [@http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html MPL Integral Constant]]
 [def __mpl_boolean_constant__   [@http://www.boost.org/libs/mpl/doc/refmanual/integral-constant.html MPL Boolean Constant]]
@ -131,6 +130,7 @@
 [def __reverse_view__           [link fusion.view.reverse_view `reverse_view`]]
 [def __zip_view__               [link fusion.view.zip_view `zip_view`]]
 [def __flatten_view__           [link fusion.view.flatten_view `flatten_view`]]
+[def __identity_view__          [link fusion.view.identity_view `identity_view`]]

 [def __array__                  [link fusion.adapted.array array]]
 [def __std_pair__               [link fusion.adapted.std__pair `std::pair`]]
--- a/doc/html/index.html
+++ b/doc/html/index.html
@ -163,6 +163,7 @@
 <dt><span class="section"><a href="fusion/view/zip_view.html">zip_view</a></span></dt>
 <dt><span class="section"><a href="fusion/view/transform_view.html">transform_view</a></span></dt>
 <dt><span class="section"><a href="fusion/view/reverse_view.html">reverse_view</a></span></dt>
+<dt><span class="section"><a href="fusion/view/identity_view.html">identity_view</a></span></dt>
 <dt><span class="section"><a href="fusion/view/nview.html">nview</a></span></dt>
 <dt><span class="section"><a href="fusion/view/repetitive_view.html">repetitive_view</a></span></dt>
 <dt><span class="section"><a href="fusion/view/flatten_view.html">flatten_view</a></span></dt>
--- a/doc/iterator.qbk
+++ b/doc/iterator.qbk
@ -254,6 +254,7 @@ expressions must be valid:
 * __iterator_range__ iterator (where adapted iterators are __associative_iterator__\ s)
 * __joint_view__ iterator (where adapted sequences are __associative_sequence__\ s and __forward_sequence__\ s)
 * __reverse_view__ iterator (where adapted sequence is an __associative_sequence__ and a __bidirectional_sequence__)
+* __transform_view__ iterator (where adapted sequence is an __associative_sequence__ and a __forward_sequence__)

 [endsect]

--- a/doc/organization.qbk
+++ b/doc/organization.qbk
@ -60,6 +60,7 @@ link against.
    * single_view
    * transform_view
    * zip_view
+    * identity_view
 * container
    * deque
    * list
--- a/doc/preface.qbk
+++ b/doc/preface.qbk
@ -61,11 +61,8 @@ tool. QuickBook can be found in the __boost_tools__.
 [heading Support]

 Please direct all questions to Spirit's mailing list. You can subscribe to the
-__spirit_list__. The mailing list has a searchable archive. A search link to
-this archive is provided in __spirit__'s home page. You may also read and post
-messages to the mailing list through __spirit_general__ (thanks to __gmane__).
-The news group mirrors the mailing list. Here is a link to the archives:
-__mlist_archive__.
+__spirit_list__. The mailing list has a searchable archive. Here is a link to
+the archives: __list_archive__.

 [endsect]

--- a/doc/references.qbk
+++ b/doc/references.qbk
@ -1,6 +1,7 @@
 [/==============================================================================
    Copyright (C) 2001-2011 Joel de Guzman
    Copyright (C) 2006 Dan Marsden
+    Copyright (C) 2018 Kohei Takahashi

    Use, modification and distribution is subject to the Boost Software
    License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@ -8,20 +9,20 @@
 ===============================================================================/]
 [section References]

-# [@http://boost.org/libs/iterator/doc/new-iter-concepts.html New Iterator Concepts],
+# [@http://www.boost.org/libs/iterator/doc/new-iter-concepts.html New Iterator Concepts],
  David Abrahams, Jeremy Siek, Thomas Witt, 2004-11-01.
-# [@http://boost.org/libs/tuple/doc/tuple_users_guide.html The Boost Tuple Library],
+# [@http://www.boost.org/libs/tuple The Boost Tuple Library],
  Jaakko Jarvi, 2001.
-# [@http://www.boost.org/libs/spirit/ Spirit Parser Library],
+# [@http://www.boost.org/libs/spirit Spirit Parser Library],
  Joel de Guzman, 2001-2006.
-# [@http://www.boost.org/libs/mpl/ The Boost MPL Library],
+# [@http://www.boost.org/libs/mpl The Boost MPL Library],
  Aleksey Gurtovoy and David Abrahams, 2002-2004.
-# [@http://www.boost.org/doc/html/array.html Boost Array],
+# [@http://www.boost.org/libs/array The Boost Array Library],
  Nicolai Josuttis, 2002-2004.
-# [@http://www.sgi.com/tech/stl/ Standard Template Library Programmer's Guide],
-  Hewlett-Packard Company, 1994.
-# [@http://www.boost.org/doc/html/ref.html Boost.Ref],
+# [@http://www.boost.org/libs/core/ref.html Boost.Core / Ref utility],
  Jaakko Jarvi, Peter Dimov, Douglas Gregor, Dave Abrahams, 1999-2002.
+# [@http://www.boost.org/libs/hana The Boost Hana Library],
+  Louis Dionne, 2017.

 [endsect]

--- a/doc/sequence.qbk
+++ b/doc/sequence.qbk
@ -166,7 +166,7 @@ Bidirectional Sequence the following must be met:
    [[`__back__(s)`]        [Any type]                      []                      [Constant]]
    [[`__back__(s) = o`]    [Any type]                      [`s` is mutable and
                                                        `e = o`, where `e`
-                                                        is the first element
+                                                        is the last element
                                                        in the sequence, is
                                                        a valid expression.]    [Constant]]
 ]
@ -237,14 +237,14 @@ any Random Access Sequence the following must be met:
    [[`__at_c__<N>(s)`]     [Any type]                      []                      [Constant]]
    [[`__at_c__<N>(s) = o`] [Any type]                      [`s` is mutable and
                                                        `e = o`, where `e`
-                                                        is the first element
-                                                        in the sequence, is
+                                                        is the N-th element from the beginning
+                                                        of the sequence, is
                                                        a valid expression.]        [Constant]]
    [[`__at__<M>(s)`]       [Any type]                      []                      [Constant]]
    [[`__at__<M>(s) = o`]   [Any type]                      [`s` is mutable and
                                                        `e = o`, where `e`
-                                                        is the first element
-                                                        in the sequence, is
+                                                        is the M-th element from the beginning
+                                                        of the sequence, is
                                                        a valid expression.]        [Constant]]
 ]

@ -321,8 +321,7 @@ For any Associative Sequence the following expressions must be valid:
    [[`__at_key__<K>(s)`]       [Any type]                  []                      [Constant]]
    [[`__at_key__<K>(s) = o`]   [Any type]                  [`s` is mutable and
                                                        `e = o`, where `e`
-                                                        is the first element
-                                                        in the sequence, is
+                                                        is the element associated with K, is
                                                        a valid expression.]    [Constant]]
 ]

@ -361,6 +360,7 @@ you can use `__result_of_value_at_key__<S, K>`.]
 * __iterator_range__ (where adapted iterators are __associative_iterator__\ s)
 * __joint_view__     (where adapted sequences are __associative_sequence__\ s and __forward_sequence__\ s)
 * __reverse_view__   (where adapted sequence is an __associative_sequence__ and a __bidirectional_sequence__)
+* __transform_view__ (where adapted sequence is an __associative_sequence__ and a __forward_sequence__)

 [endsect]

@ -714,11 +714,11 @@ Returns the M-th element from the beginning of the sequence.
 [heading Synopsis]

    template <typename M, typename Sequence>
-    typename __result_of_at__<Sequence, N>::type
+    typename __result_of_at__<Sequence, M>::type
    at(Sequence& seq);

    template <typename M, typename Sequence>
-    typename __result_of_at__<Sequence const, N>::type
+    typename __result_of_at__<Sequence const, M>::type
    at(Sequence const& seq);

 [heading Parameters]
@ -1522,6 +1522,16 @@ each element. Analogously, the global `operator>>` has been overloaded
 to extract __sequence__(s) from generic input streams by recursively
 calling `operator>>` for each element.

+Please note that, to display your adapted types via fusion IO system,
+corresponding overloaded operators should be introduced to same namespace
+of the type.
+
+    namespace your_awesome_library
+    {
+        using boost::fusion::operators::operator>>; // for input
+        using boost::fusion::operators::operator<<; // for output
+        ...
+
 The default delimiter between the elements is space, and the __sequence__
 is enclosed in parenthesis. For Example:

--- a/doc/view.qbk
+++ b/doc/view.qbk
@ -1,6 +1,7 @@
 [/==============================================================================
    Copyright (C) 2001-2011 Joel de Guzman
    Copyright (C) 2006 Dan Marsden
+    Copyright (c) 2022 Denis Mikhailov

    Use, modification and distribution is subject to the Boost Software
    License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
@ -93,10 +94,9 @@ presents only those elements for which its predicate evaluates to
 [heading Template parameters]

 [table
-    [[Parameter]            [Description]               [Default]]
-    [[`Sequence`]           [A __forward_sequence__]    []]
-    [[`Pred`]               [Unary Metafunction
-                             returning an `mpl::bool_`] []]
+    [[Parameter]            [Description]                       [Default]]
+    [[`Sequence`]           [A __forward_sequence__]            []]
+    [[`Pred`]               [A unary __mpl_lambda_expression__] []]
 ]

 [heading Model of]
@ -271,7 +271,7 @@ defined in the implemented models.
 [heading Description]

 `zip_view` presents a view which iterates over a collection of __sequence__(s) in parallel. A `zip_view`
-is constructed from a __sequence__ of references to the component __sequence__s.
+is constructed from a __sequence__ of references to the component `__sequence__`s.

 [heading Header]

@ -287,7 +287,7 @@ is constructed from a __sequence__ of references to the component __sequence__s.

 [table
    [[Parameter]            [Description]                   [Default]]
-    [[`Sequences`]          [A __forward_sequence__ of references to other Fusion __sequence__s]        []]
+    [[`Sequences`]          [A __forward_sequence__ of references to other Fusion `__sequence__`s]        []]
 ]

 [heading Model of]
@ -309,7 +309,7 @@ defined in __forward_sequence__.

 [table
    [[Expression]           [Semantics]]
-    [[`ZV(s)`]              [Creates a `zip_view` given a sequence of references to the component __sequence__s.]]
+    [[`ZV(s)`]              [Creates a `zip_view` given a sequence of references to the component `__sequence__`s.]]
    [[`ZV(zv1)`]             [Copy constructs a `zip_view` from another `zip_view`, `zv`.]]
    [[`zv1 = zv2`]           [Assigns to a `zip_view`, `zv`, from another `zip_view`, `zv2`.]]
 ]
@ -329,9 +329,7 @@ defined in __forward_sequence__.
 The unary version of `transform_view` presents a view of its underlying
 sequence given a unary function object or function pointer. The binary
 version of `transform_view` presents a view of 2 underlying sequences,
-given a binary function object or function pointer. The `transform_view`
-inherits the traversal characteristics (see __traversal_concept__)  of
-its underlying sequence or sequences.
+given a binary function object or function pointer.

 [heading Header]

@ -365,7 +363,8 @@ its underlying sequence or sequences.

 * __forward_sequence__, __bidirectional_sequence__ or
 __random_access_sequence__ depending on the traversal characteristics (see
-__traversal_concept__) of its underlying sequence.
+__traversal_concept__) of its underlying sequence or sequences.
+* __associative_sequence__ if underlying sequence implements the __associative_sequence__ model(available only with unary version of `transform_view`).

 [variablelist Notation
    [[`TV`]             [A `transform_view` type]]
@ -382,9 +381,7 @@ __traversal_concept__) of its underlying sequence.
 [heading Expression Semantics]

 Semantics of an expression is defined only where it differs from, or is not
-defined in __forward_sequence__, __bidirectional_sequence__ or
-__random_access_sequence__ depending on the traversal characteristics (see
-__traversal_concept__) of its underlying sequence or sequences.
+defined in the implemented models.

 [table
    [[Expression]           [Semantics]]
@ -668,4 +665,60 @@ defined in __forward_sequence__.

 [endsect]

+[section identity_view]
+
+[heading Description]
+
+`identity_view` presents underlying sequence unchanged.
+
+[heading Header]
+
+    #include <boost/fusion/view/identity_view.hpp>
+    #include <boost/fusion/include/identity_view.hpp>
+
+[heading Synopsis]
+
+    template <typename Sequence>
+    struct identity_view;
+
+[heading Template parameters]
+
+[table
+    [[Parameter]            [Description]                   [Default]]
+    [[`Sequence`]           [A __forward_sequence__]        []]
+]
+
+[heading Model of]
+
+* A model of __forward_sequence__ if `Sequence` is a __forward_sequence__ else, __bidirectional_sequence__ if `Sequence` is a __bidirectional_sequence__
+else, __random_access_sequence__ if `Sequence` is a __random_access_sequence__.
+* __associative_sequence__ if `Sequence` implements the __associative_sequence__ model.
+
+[variablelist Notation
+    [[`IV`]             [An `identity_view` type]]
+    [[`s`]              [An instance of `Sequence`]]
+    [[`iv`, `iv2`]      [Instances of `identity_view`]]
+]
+
+[heading Expression Semantics]
+
+Semantics of an expression is defined only where it differs from, or is not
+defined in the implemented models.
+
+[table
+    [[Expression]           [Semantics]]
+    [[`IV(s)`]              [Creates an `identity_view` given sequence, `s`.]]
+    [[`IV(iv)`]             [Copy constructs an `identity_view` from another `identity_view`, `iv`.]]
+    [[`iv = iv2`]           [Assigns to an `identity_view`, `iv`, from another `identity_view`, `iv2`.]]
+]
+
+[heading Example]
+    typedef __vector__<int, short, double> vector_type;
+    vector_type vec(2, 5, 3.3);
+
+    __identity_view__<vector_type> identity(vec);
+    std::cout << identity << std::endl; // (2 5 3.3)
+
+[endsect]
+
 [endsect]
--- a/example/cookbook/do_the_bind.cpp
+++ b/example/cookbook/do_the_bind.cpp
@ -46,7 +46,7 @@
 #include <boost/mpl/max.hpp>
 #include <boost/mpl/next.hpp>

-#include <boost/ref.hpp>
+#include <boost/core/ref.hpp>
 #include <iostream>
 #include <typeinfo>

--- a/example/extension/detail/advance_impl.hpp
+++ b/example/extension/detail/advance_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_ADVANCE_IMPL_20060222_2150)
+#ifndef BOOST_FUSION_ADVANCE_IMPL_20060222_2150
 #define BOOST_FUSION_ADVANCE_IMPL_20060222_2150

 namespace example
--- a/example/extension/detail/at_impl.hpp
+++ b/example/extension/detail/at_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_AT_IMPL_20060223_2017)
+#ifndef BOOST_FUSION_AT_IMPL_20060223_2017
 #define BOOST_FUSION_AT_IMPL_20060223_2017

 #include <string>
--- a/example/extension/detail/at_key_impl.hpp
+++ b/example/extension/detail/at_key_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_AT_KEY_IMPL_20060223_2017)
+#ifndef BOOST_FUSION_AT_KEY_IMPL_20060223_2017
 #define BOOST_FUSION_AT_KEY_IMPL_20060223_2017

 #include <string>
--- a/example/extension/detail/begin_impl.hpp
+++ b/example/extension/detail/begin_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_BEGIN_IMPL_20060222_2042)
+#ifndef BOOST_FUSION_BEGIN_IMPL_20060222_2042
 #define BOOST_FUSION_BEGIN_IMPL_20060222_2042

 #include "../example_struct_iterator.hpp"
--- a/example/extension/detail/category_of_impl.hpp
+++ b/example/extension/detail/category_of_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_CATEGORY_OF_IMPL_20060223_2037)
+#ifndef BOOST_FUSION_CATEGORY_OF_IMPL_20060223_2037
 #define BOOST_FUSION_CATEGORY_OF_IMPL_20060223_2037

 #include <boost/fusion/support/category_of.hpp>
--- a/example/extension/detail/deref_impl.hpp
+++ b/example/extension/detail/deref_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_DEREF_IMPL_20060222_1952)
+#ifndef BOOST_FUSION_DEREF_IMPL_20060222_1952
 #define BOOST_FUSION_DEREF_IMPL_20060222_1952

 #include <boost/static_assert.hpp>
--- a/example/extension/detail/distance_impl.hpp
+++ b/example/extension/detail/distance_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_DISTANCE_IMPL_20060223_0814)
+#ifndef BOOST_FUSION_DISTANCE_IMPL_20060223_0814
 #define BOOST_FUSION_DISTANCE_IMPL_20060223_0814

 #include <boost/mpl/minus.hpp>
--- a/example/extension/detail/end_impl.hpp
+++ b/example/extension/detail/end_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_END_IMPL_20060222_2042)
+#ifndef BOOST_FUSION_END_IMPL_20060222_2042
 #define BOOST_FUSION_END_IMPL_20060222_2042

 #include "../example_struct_iterator.hpp"
--- a/example/extension/detail/equal_to_impl.hpp
+++ b/example/extension/detail/equal_to_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_EQUAL_TO_IMPL_20060223_1941)
+#ifndef BOOST_FUSION_EQUAL_TO_IMPL_20060223_1941
 #define BOOST_FUSION_EQUAL_TO_IMPL_20060223_1941

 #include <boost/mpl/equal_to.hpp>
--- a/example/extension/detail/has_key_impl.hpp
+++ b/example/extension/detail/has_key_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_HAS_KEY_IMPL_20060223_2156)
+#ifndef BOOST_FUSION_HAS_KEY_IMPL_20060223_2156
 #define BOOST_FUSION_HAS_KEY_IMPL_20060223_2156

 #include <boost/type_traits/is_same.hpp>
--- a/example/extension/detail/is_sequence_impl.hpp
+++ b/example/extension/detail/is_sequence_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_IS_SEQUENCE_IMPL_20060228_1946)
+#ifndef BOOST_FUSION_IS_SEQUENCE_IMPL_20060228_1946
 #define BOOST_FUSION_IS_SEQUENCE_IMPL_20060228_1946

 #include <boost/mpl/bool.hpp>
--- a/example/extension/detail/is_view_impl.hpp
+++ b/example/extension/detail/is_view_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_IS_VIEW_IMPL_200604227_2150)
+#ifndef BOOST_FUSION_IS_VIEW_IMPL_200604227_2150
 #define BOOST_FUSION_IS_VIEW_IMPL_200604227_2150

 #include <boost/mpl/bool.hpp>
--- a/example/extension/detail/next_impl.hpp
+++ b/example/extension/detail/next_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_NEXT_IMPL_20060222_1859)
+#ifndef BOOST_FUSION_NEXT_IMPL_20060222_1859
 #define BOOST_FUSION_NEXT_IMPL_20060222_1859

 namespace example
--- a/example/extension/detail/prior_impl.hpp
+++ b/example/extension/detail/prior_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_PRIOR_IMPL_20060222_1944)
+#ifndef BOOST_FUSION_PRIOR_IMPL_20060222_1944
 #define BOOST_FUSION_PRIOR_IMPL_20060222_1944

 namespace example
--- a/example/extension/detail/size_impl.hpp
+++ b/example/extension/detail/size_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_SIZE_IMPL_20060223_2033)
+#ifndef BOOST_FUSION_SIZE_IMPL_20060223_2033
 #define BOOST_FUSION_SIZE_IMPL_20060223_2033

 #include <boost/mpl/int.hpp>
--- a/example/extension/detail/value_at_impl.hpp
+++ b/example/extension/detail/value_at_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_VALUE_AT_IMPL_20060223_2025)
+#ifndef BOOST_FUSION_VALUE_AT_IMPL_20060223_2025
 #define BOOST_FUSION_VALUE_AT_IMPL_20060223_2025

 namespace example
--- a/example/extension/detail/value_at_key_impl.hpp
+++ b/example/extension/detail/value_at_key_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_VALUE_AT_KEY_IMPL_20060223_2025)
+#ifndef BOOST_FUSION_VALUE_AT_KEY_IMPL_20060223_2025
 #define BOOST_FUSION_VALUE_AT_KEY_IMPL_20060223_2025

 namespace fields
--- a/example/extension/detail/value_of_impl.hpp
+++ b/example/extension/detail/value_of_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_VALUE_OF_IMPL_20060223_1905)
+#ifndef BOOST_FUSION_VALUE_OF_IMPL_20060223_1905
 #define BOOST_FUSION_VALUE_OF_IMPL_20060223_1905

 #include <string>
--- a/example/extension/example_struct.hpp
+++ b/example/extension/example_struct.hpp
@ -5,7 +5,7 @@
    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_FUSION_EXAMPLE_STRUCT)
+#ifndef BOOST_FUSION_EXAMPLE_STRUCT
 #define BOOST_FUSION_EXAMPLE_STRUCT

 #include "./tag_of.hpp"
--- a/example/extension/example_struct_iterator.hpp
+++ b/example/extension/example_struct_iterator.hpp
@ -5,7 +5,7 @@
    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_FUSION_EXAMPLE_STRUCT_ITERATOR)
+#ifndef BOOST_FUSION_EXAMPLE_STRUCT_ITERATOR
 #define BOOST_FUSION_EXAMPLE_STRUCT_ITERATOR

 #include <boost/fusion/support/iterator_base.hpp>
--- a/example/extension/example_struct_type.hpp
+++ b/example/extension/example_struct_type.hpp
@ -5,7 +5,7 @@
    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_FUSION_EXAMPLE_STRUCT_TYPE)
+#ifndef BOOST_FUSION_EXAMPLE_STRUCT_TYPE
 #define BOOST_FUSION_EXAMPLE_STRUCT_TYPE

 #include <string>
--- a/example/extension/tag_of.hpp
+++ b/example/extension/tag_of.hpp
@ -5,7 +5,7 @@
    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_FUSION_TAG_OF_20060222_2052)
+#ifndef BOOST_FUSION_TAG_OF_20060222_2052
 #define BOOST_FUSION_TAG_OF_20060222_2052

 #include <boost/fusion/support/tag_of_fwd.hpp>
--- a/include/boost/fusion/adapted.hpp
+++ b/include/boost/fusion/adapted.hpp
@ -5,7 +5,7 @@
    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_FUSION_ADAPTED_30122005_1420)
+#ifndef BOOST_FUSION_ADAPTED_30122005_1420
 #define BOOST_FUSION_ADAPTED_30122005_1420

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/adt/adapt_adt.hpp
+++ b/include/boost/fusion/adapted/adt/adapt_adt.hpp
@ -16,10 +16,6 @@
 #include <boost/preprocessor/empty.hpp>
 #include <boost/preprocessor/control/if.hpp>
 #include <boost/preprocessor/comparison/less.hpp>
-#include <boost/type_traits/add_reference.hpp>
-#include <boost/type_traits/is_const.hpp>
-#include <boost/type_traits/add_const.hpp>
-#include <boost/type_traits/remove_const.hpp>

 #include <boost/fusion/adapted/struct/detail/extension.hpp>
 #include <boost/fusion/adapted/struct/detail/adapt_base.hpp>
--- a/include/boost/fusion/adapted/adt/adapt_assoc_adt.hpp
+++ b/include/boost/fusion/adapted/adt/adapt_assoc_adt.hpp
@ -15,9 +15,6 @@
 #include <boost/preprocessor/cat.hpp>
 #include <boost/preprocessor/empty.hpp>
 #include <boost/preprocessor/control/if.hpp>
-#include <boost/type_traits/add_reference.hpp>
-#include <boost/type_traits/is_const.hpp>
-#include <boost/type_traits/remove_const.hpp>

 #include <boost/fusion/adapted/struct/detail/extension.hpp>
 #include <boost/fusion/adapted/struct/detail/adapt_base.hpp>
--- a/include/boost/fusion/adapted/adt/detail/adapt_base.hpp
+++ b/include/boost/fusion/adapted/adt/detail/adapt_base.hpp
@ -21,8 +21,8 @@
 #include <boost/preprocessor/tuple/elem.hpp>
 #include <boost/mpl/if.hpp>
 #include <boost/type_traits/is_const.hpp>
-#include <boost/type_traits/add_const.hpp>
 #include <boost/type_traits/remove_const.hpp>
+#include <boost/type_traits/remove_reference.hpp>

 #include <boost/typeof/typeof.hpp>

@ -83,20 +83,8 @@
    typedef                                                                     \
        BOOST_PP_EXPR_IF(BOOST_FUSION_ADAPT_IS_TPL(TEMPLATE_PARAMS_SEQ),        \
                         typename)                                              \
-        boost::remove_const<                                                    \
-          BOOST_PP_EXPR_IF(BOOST_FUSION_ADAPT_IS_TPL(TEMPLATE_PARAMS_SEQ),      \
-                           typename) \
-          deduced_attr_type::type                                               \
-        >::type type;                                                           \
-                                                                                \
-    typedef                                                                     \
-        BOOST_PP_EXPR_IF(BOOST_FUSION_ADAPT_IS_TPL(TEMPLATE_PARAMS_SEQ),        \
-                         typename)   \
-        boost::add_const<                                                       \
-          BOOST_PP_EXPR_IF(BOOST_FUSION_ADAPT_IS_TPL(TEMPLATE_PARAMS_SEQ),      \
-                           typename) \
-          deduced_attr_type::type                                               \
-    >::type const_type;
+        deduced_attr_type::type type;                                           \
+    typedef type const_type;

 #define BOOST_FUSION_ADT_ATTRIBUTE_GIVENTYPE(                                   \
    NAME_SEQ, ATTRIBUTE, ATTRIBUTE_TUPLE_SIZE, PREFIX, TEMPLATE_PARAMS_SEQ)     \
--- a/include/boost/fusion/adapted/array.hpp
+++ b/include/boost/fusion/adapted/array.hpp
@ -6,7 +6,7 @@
    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_FUSION_ARRAY_27122005_1035)
+#ifndef BOOST_FUSION_ARRAY_27122005_1035
 #define BOOST_FUSION_ARRAY_27122005_1035

 //For backwards compatibility
--- a/include/boost/fusion/adapted/boost_array.hpp
+++ b/include/boost/fusion/adapted/boost_array.hpp
@ -5,7 +5,7 @@
    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_FUSION_BOOST_ARRAY_27122005_1035)
+#ifndef BOOST_FUSION_BOOST_ARRAY_27122005_1035
 #define BOOST_FUSION_BOOST_ARRAY_27122005_1035

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_array/array_iterator.hpp
+++ b/include/boost/fusion/adapted/boost_array/array_iterator.hpp
@ -5,7 +5,7 @@
    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_FUSION_ARRAY_ITERATOR_26122005_2250)
+#ifndef BOOST_FUSION_ARRAY_ITERATOR_26122005_2250
 #define BOOST_FUSION_ARRAY_ITERATOR_26122005_2250

 #include <boost/fusion/support/config.hpp>
@ -18,6 +18,11 @@
 #include <boost/type_traits/is_const.hpp>
 #include <boost/fusion/iterator/iterator_facade.hpp>

+#ifdef _MSC_VER
+#  pragma warning(push)
+#  pragma warning(disable: 4512) // assignment operator could not be generated.
+#endif
+
 namespace boost { namespace fusion
 {
    struct random_access_traversal_tag;
@ -102,13 +107,13 @@ namespace boost { namespace fusion
                return type();
            }
        };
-
-    private:
-
-        array_iterator<Array, Pos>& operator=(array_iterator<Array, Pos> const&);
    };
 }}

+#ifdef _MSC_VER
+#  pragma warning(pop)
+#endif
+
 #ifdef BOOST_FUSION_WORKAROUND_FOR_LWG_2408
 namespace std
 {
--- a/include/boost/fusion/adapted/boost_array/detail/at_impl.hpp
+++ b/include/boost/fusion/adapted/boost_array/detail/at_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_AT_IMPL_27122005_1241)
+#ifndef BOOST_FUSION_AT_IMPL_27122005_1241
 #define BOOST_FUSION_AT_IMPL_27122005_1241

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_array/detail/begin_impl.hpp
+++ b/include/boost/fusion/adapted/boost_array/detail/begin_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_BEGIN_IMPL_27122005_1117)
+#ifndef BOOST_FUSION_BEGIN_IMPL_27122005_1117
 #define BOOST_FUSION_BEGIN_IMPL_27122005_1117

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_array/detail/category_of_impl.hpp
+++ b/include/boost/fusion/adapted/boost_array/detail/category_of_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_CATEGORY_OF_IMPL_27122005_1044)
+#ifndef BOOST_FUSION_CATEGORY_OF_IMPL_27122005_1044
 #define BOOST_FUSION_CATEGORY_OF_IMPL_27122005_1044

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_array/detail/end_impl.hpp
+++ b/include/boost/fusion/adapted/boost_array/detail/end_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_END_IMPL_27122005_1120)
+#ifndef BOOST_FUSION_END_IMPL_27122005_1120
 #define BOOST_FUSION_END_IMPL_27122005_1120

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_array/detail/is_sequence_impl.hpp
+++ b/include/boost/fusion/adapted/boost_array/detail/is_sequence_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_IS_SEQUENCE_IMPL_27122005_1648)
+#ifndef BOOST_FUSION_IS_SEQUENCE_IMPL_27122005_1648
 #define BOOST_FUSION_IS_SEQUENCE_IMPL_27122005_1648

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_array/detail/is_view_impl.hpp
+++ b/include/boost/fusion/adapted/boost_array/detail/is_view_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_IS_VIEW_IMPL_27042006_2221)
+#ifndef BOOST_FUSION_IS_VIEW_IMPL_27042006_2221
 #define BOOST_FUSION_IS_VIEW_IMPL_27042006_2221

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_array/detail/size_impl.hpp
+++ b/include/boost/fusion/adapted/boost_array/detail/size_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_SIZE_IMPL_27122005_1251)
+#ifndef BOOST_FUSION_SIZE_IMPL_27122005_1251
 #define BOOST_FUSION_SIZE_IMPL_27122005_1251

 namespace boost { namespace fusion {
--- a/include/boost/fusion/adapted/boost_array/detail/value_at_impl.hpp
+++ b/include/boost/fusion/adapted/boost_array/detail/value_at_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_VALUE_AT_IMPL_27122005_1256)
+#ifndef BOOST_FUSION_VALUE_AT_IMPL_27122005_1256
 #define BOOST_FUSION_VALUE_AT_IMPL_27122005_1256

 namespace boost { namespace fusion {
--- a/include/boost/fusion/adapted/boost_array/tag_of.hpp
+++ b/include/boost/fusion/adapted/boost_array/tag_of.hpp
@ -5,7 +5,7 @@
    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(FUSION_SEQUENCE_TAG_OF_27122005_1030)
+#ifndef FUSION_SEQUENCE_TAG_OF_27122005_1030
 #define FUSION_SEQUENCE_TAG_OF_27122005_1030

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_tuple.hpp
+++ b/include/boost/fusion/adapted/boost_tuple.hpp
@ -4,7 +4,7 @@
    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_FUSION_BOOST_TUPLE_09272006_0732)
+#ifndef BOOST_FUSION_BOOST_TUPLE_09272006_0732
 #define BOOST_FUSION_BOOST_TUPLE_09272006_0732

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_tuple/boost_tuple_iterator.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/boost_tuple_iterator.hpp
@ -4,7 +4,7 @@
    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(FUSION_BOOST_TUPLE_ITERATOR_09262006_1851)
+#ifndef FUSION_BOOST_TUPLE_ITERATOR_09262006_1851
 #define FUSION_BOOST_TUPLE_ITERATOR_09262006_1851

 #include <boost/fusion/support/config.hpp>
@ -45,6 +45,10 @@ namespace boost { namespace fusion
    template <typename Cons>
    struct boost_tuple_iterator_identity;

+#ifdef _MSC_VER
+#  pragma warning(push)
+#  pragma warning(disable: 4512) // assignment operator could not be generated.
+#endif
    template <typename Cons = tuples::null_type>
    struct boost_tuple_iterator
        : iterator_facade<boost_tuple_iterator<Cons>, forward_traversal_tag>
@ -143,11 +147,10 @@ namespace boost { namespace fusion
        struct equal_to
            : is_same<typename I1::identity, typename I2::identity>
        {};
-
-    private:
-        // silence MSVC warning C4512: assignment operator could not be generated
-        boost_tuple_iterator& operator= (boost_tuple_iterator const&);
    };
+#ifdef _MSC_VER
+#  pragma warning(pop)
+#endif

    template <typename Null>
    struct boost_tuple_null_iterator
--- a/include/boost/fusion/adapted/boost_tuple/detail/at_impl.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/detail/at_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_AT_IMPL_09262006_1920)
+#ifndef BOOST_FUSION_AT_IMPL_09262006_1920
 #define BOOST_FUSION_AT_IMPL_09262006_1920

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_tuple/detail/begin_impl.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/detail/begin_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_BEGIN_IMPL_09272006_0719)
+#ifndef BOOST_FUSION_BEGIN_IMPL_09272006_0719
 #define BOOST_FUSION_BEGIN_IMPL_09272006_0719

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_tuple/detail/build_cons.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/detail/build_cons.hpp
@ -4,7 +4,7 @@
    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_FUSION_BUILD_CONS_10172012_0130)
+#ifndef BOOST_FUSION_BUILD_CONS_10172012_0130
 #define BOOST_FUSION_BUILD_CONS_10172012_0130

 #include <boost/tuple/tuple.hpp>
--- a/include/boost/fusion/adapted/boost_tuple/detail/category_of_impl.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/detail/category_of_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_CATEGORY_OF_IMPL_09272006_0726)
+#ifndef BOOST_FUSION_CATEGORY_OF_IMPL_09272006_0726
 #define BOOST_FUSION_CATEGORY_OF_IMPL_09272006_0726

 namespace boost { namespace fusion 
--- a/include/boost/fusion/adapted/boost_tuple/detail/convert_impl.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/detail/convert_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_CONVERT_IMPL_10172012_0120)
+#ifndef BOOST_FUSION_CONVERT_IMPL_10172012_0120
 #define BOOST_FUSION_CONVERT_IMPL_10172012_0120

 #include <boost/tuple/tuple.hpp>
--- a/include/boost/fusion/adapted/boost_tuple/detail/end_impl.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/detail/end_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_END_IMPL_09272006_0721)
+#ifndef BOOST_FUSION_END_IMPL_09272006_0721
 #define BOOST_FUSION_END_IMPL_09272006_0721

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_tuple/detail/is_sequence_impl.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/detail/is_sequence_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_IS_SEQUENCE_IMPL_09272006_0726)
+#ifndef BOOST_FUSION_IS_SEQUENCE_IMPL_09272006_0726
 #define BOOST_FUSION_IS_SEQUENCE_IMPL_09272006_0726

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_tuple/detail/is_view_impl.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/detail/is_view_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_IS_VIEW_IMPL_09272006_0725)
+#ifndef BOOST_FUSION_IS_VIEW_IMPL_09272006_0725
 #define BOOST_FUSION_IS_VIEW_IMPL_09272006_0725

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_tuple/detail/size_impl.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/detail/size_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_SIZE_IMPL_09272006_0724)
+#ifndef BOOST_FUSION_SIZE_IMPL_09272006_0724
 #define BOOST_FUSION_SIZE_IMPL_09272006_0724

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_tuple/detail/value_at_impl.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/detail/value_at_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_VALUE_AT_IMPL_09262006_1926)
+#ifndef BOOST_FUSION_VALUE_AT_IMPL_09262006_1926
 #define BOOST_FUSION_VALUE_AT_IMPL_09262006_1926

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/boost_tuple/mpl/clear.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/mpl/clear.hpp
@ -4,7 +4,7 @@
    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_FUSION_CLEAR_10172012_0100)
+#ifndef BOOST_FUSION_CLEAR_10172012_0100
 #define BOOST_FUSION_CLEAR_10172012_0100

 #include <boost/mpl/identity.hpp>
--- a/include/boost/fusion/adapted/boost_tuple/tag_of.hpp
+++ b/include/boost/fusion/adapted/boost_tuple/tag_of.hpp
@ -4,7 +4,7 @@
    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_FUSION_TAG_OF_09262006_1900)
+#ifndef BOOST_FUSION_TAG_OF_09262006_1900
 #define BOOST_FUSION_TAG_OF_09262006_1900

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/mpl.hpp
+++ b/include/boost/fusion/adapted/mpl.hpp
@ -5,7 +5,7 @@
    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_FUSION_MPL_31122005_1152)
+#ifndef BOOST_FUSION_MPL_31122005_1152
 #define BOOST_FUSION_MPL_31122005_1152

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/mpl/detail/at_impl.hpp
+++ b/include/boost/fusion/adapted/mpl/detail/at_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_AT_IMPL_31122005_1642)
+#ifndef BOOST_FUSION_AT_IMPL_31122005_1642
 #define BOOST_FUSION_AT_IMPL_31122005_1642

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/mpl/detail/begin_impl.hpp
+++ b/include/boost/fusion/adapted/mpl/detail/begin_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_BEGIN_IMPL_31122005_1209)
+#ifndef BOOST_FUSION_BEGIN_IMPL_31122005_1209
 #define BOOST_FUSION_BEGIN_IMPL_31122005_1209

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/mpl/detail/category_of_impl.hpp
+++ b/include/boost/fusion/adapted/mpl/detail/category_of_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_CATEGORY_OF_IMPL_20060217_2141)
+#ifndef BOOST_FUSION_CATEGORY_OF_IMPL_20060217_2141
 #define BOOST_FUSION_CATEGORY_OF_IMPL_20060217_2141

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/mpl/detail/empty_impl.hpp
+++ b/include/boost/fusion/adapted/mpl/detail/empty_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_EMPTY_IMPL_31122005_1554)
+#ifndef BOOST_FUSION_EMPTY_IMPL_31122005_1554
 #define BOOST_FUSION_EMPTY_IMPL_31122005_1554

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/mpl/detail/end_impl.hpp
+++ b/include/boost/fusion/adapted/mpl/detail/end_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_END_IMPL_31122005_1237)
+#ifndef BOOST_FUSION_END_IMPL_31122005_1237
 #define BOOST_FUSION_END_IMPL_31122005_1237

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/mpl/detail/has_key_impl.hpp
+++ b/include/boost/fusion/adapted/mpl/detail/has_key_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_HAS_KEY_IMPL_31122005_1647)
+#ifndef BOOST_FUSION_HAS_KEY_IMPL_31122005_1647
 #define BOOST_FUSION_HAS_KEY_IMPL_31122005_1647

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/mpl/detail/is_sequence_impl.hpp
+++ b/include/boost/fusion/adapted/mpl/detail/is_sequence_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_IS_SEQUENCE_IMPL_31122005_1505)
+#ifndef BOOST_FUSION_IS_SEQUENCE_IMPL_31122005_1505
 #define BOOST_FUSION_IS_SEQUENCE_IMPL_31122005_1505

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/mpl/detail/is_view_impl.hpp
+++ b/include/boost/fusion/adapted/mpl/detail/is_view_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_IS_VIEW_IMPL_03202006_0048)
+#ifndef BOOST_FUSION_IS_VIEW_IMPL_03202006_0048
 #define BOOST_FUSION_IS_VIEW_IMPL_03202006_0048

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/mpl/detail/size_impl.hpp
+++ b/include/boost/fusion/adapted/mpl/detail/size_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_SIZE_IMPL_31122005_1508)
+#ifndef BOOST_FUSION_SIZE_IMPL_31122005_1508
 #define BOOST_FUSION_SIZE_IMPL_31122005_1508

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/mpl/detail/value_at_impl.hpp
+++ b/include/boost/fusion/adapted/mpl/detail/value_at_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_VALUE_AT_IMPL_31122005_1621)
+#ifndef BOOST_FUSION_VALUE_AT_IMPL_31122005_1621
 #define BOOST_FUSION_VALUE_AT_IMPL_31122005_1621

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/mpl/mpl_iterator.hpp
+++ b/include/boost/fusion/adapted/mpl/mpl_iterator.hpp
@ -4,7 +4,7 @@
    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(FUSION_MPL_ITERATOR_05052005_0731)
+#ifndef FUSION_MPL_ITERATOR_05052005_0731
 #define FUSION_MPL_ITERATOR_05052005_0731

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/std_array.hpp
+++ b/include/boost/fusion/adapted/std_array.hpp
@ -6,7 +6,7 @@
    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_FUSION_STD_ARRAY__01062013_1700)
+#ifndef BOOST_FUSION_STD_ARRAY__01062013_1700
 #define BOOST_FUSION_STD_ARRAY__01062013_1700

 #include <boost/fusion/adapted/std_array/std_array_iterator.hpp>
--- a/include/boost/fusion/adapted/std_array/detail/array_size.hpp
+++ b/include/boost/fusion/adapted/std_array/detail/array_size.hpp
@ -4,11 +4,11 @@
    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_FUSION_STD_ARRAY_ARRAY_SIZE_01062013_1700)
+#ifndef BOOST_FUSION_STD_ARRAY_ARRAY_SIZE_01062013_1700
 #define BOOST_FUSION_STD_ARRAY_ARRAY_SIZE_01062013_1700

 #include <cstddef>
-#include <type_traits>
+#include <boost/type_traits/integral_constant.hpp>

 namespace boost { namespace fusion
 {
@ -18,7 +18,7 @@ namespace boost { namespace fusion
        struct std_array_size;

        template<template<typename, std::size_t> class Array, typename T, std::size_t N>
-        struct std_array_size<Array<T, N>> : std::integral_constant<std::size_t, N> {};
+        struct std_array_size<Array<T, N> > : boost::integral_constant<std::size_t, N> {};
    }
 }}

--- a/include/boost/fusion/adapted/std_array/detail/at_impl.hpp
+++ b/include/boost/fusion/adapted/std_array/detail/at_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_STD_ARRAY_AT_IMPL_01062013_1700)
+#ifndef BOOST_FUSION_STD_ARRAY_AT_IMPL_01062013_1700
 #define BOOST_FUSION_STD_ARRAY_AT_IMPL_01062013_1700

 #include <boost/type_traits/is_const.hpp>
--- a/include/boost/fusion/adapted/std_array/detail/begin_impl.hpp
+++ b/include/boost/fusion/adapted/std_array/detail/begin_impl.hpp
@ -6,7 +6,7 @@
    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_FUSION_STD_ARRAY_BEGIN_OF_IMPL_01062013_1700)
+#ifndef BOOST_FUSION_STD_ARRAY_BEGIN_OF_IMPL_01062013_1700
 #define BOOST_FUSION_STD_ARRAY_BEGIN_OF_IMPL_01062013_1700

 #include <boost/fusion/adapted/std_array/std_array_iterator.hpp>
--- a/include/boost/fusion/adapted/std_array/detail/category_of_impl.hpp
+++ b/include/boost/fusion/adapted/std_array/detail/category_of_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_STD_ARRAY_CATEGORY_OF_IMPL_01062013_1700)
+#ifndef BOOST_FUSION_STD_ARRAY_CATEGORY_OF_IMPL_01062013_1700
 #define BOOST_FUSION_STD_ARRAY_CATEGORY_OF_IMPL_01062013_1700

 #include <boost/config/no_tr1/utility.hpp>
--- a/include/boost/fusion/adapted/std_array/detail/end_impl.hpp
+++ b/include/boost/fusion/adapted/std_array/detail/end_impl.hpp
@ -6,7 +6,7 @@
    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_FUSION_STD_ARRAY_END_OF_IMPL_01062013_1700)
+#ifndef BOOST_FUSION_STD_ARRAY_END_OF_IMPL_01062013_1700
 #define BOOST_FUSION_STD_ARRAY_END_OF_IMPL_01062013_1700

 #include <boost/fusion/adapted/std_array/std_array_iterator.hpp>
--- a/include/boost/fusion/adapted/std_array/detail/is_sequence_impl.hpp
+++ b/include/boost/fusion/adapted/std_array/detail/is_sequence_impl.hpp
@ -6,7 +6,7 @@
    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_FUSION_STD_ARRAY_IS_SEQUENCE_IMPL_01062013_1700)
+#ifndef BOOST_FUSION_STD_ARRAY_IS_SEQUENCE_IMPL_01062013_1700
 #define BOOST_FUSION_STD_ARRAY_IS_SEQUENCE_IMPL_01062013_1700

 #include <boost/mpl/bool.hpp>
--- a/include/boost/fusion/adapted/std_array/detail/is_view_impl.hpp
+++ b/include/boost/fusion/adapted/std_array/detail/is_view_impl.hpp
@ -6,7 +6,7 @@
    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_FUSION_STD_ARRAY_IS_VIEW_IMPL_01062013_1700)
+#ifndef BOOST_FUSION_STD_ARRAY_IS_VIEW_IMPL_01062013_1700
 #define BOOST_FUSION_STD_ARRAY_IS_VIEW_IMPL_01062013_1700

 #include <boost/mpl/bool.hpp>
--- a/include/boost/fusion/adapted/std_array/detail/size_impl.hpp
+++ b/include/boost/fusion/adapted/std_array/detail/size_impl.hpp
@ -6,7 +6,7 @@
    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_FUSION_STD_ARRAY_SIZE_IMPL_01062013_1700)
+#ifndef BOOST_FUSION_STD_ARRAY_SIZE_IMPL_01062013_1700
 #define BOOST_FUSION_STD_ARRAY_SIZE_IMPL_01062013_1700

 #include <boost/fusion/adapted/std_array/detail/array_size.hpp>
--- a/include/boost/fusion/adapted/std_array/detail/value_at_impl.hpp
+++ b/include/boost/fusion/adapted/std_array/detail/value_at_impl.hpp
@ -5,7 +5,7 @@
    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_FUSION_STD_ARRAY_VALUE_AT_IMPL_01062013_1700)
+#ifndef BOOST_FUSION_STD_ARRAY_VALUE_AT_IMPL_01062013_1700
 #define BOOST_FUSION_STD_ARRAY_VALUE_AT_IMPL_01062013_1700

 namespace boost { namespace fusion {
--- a/include/boost/fusion/adapted/std_array/std_array_iterator.hpp
+++ b/include/boost/fusion/adapted/std_array/std_array_iterator.hpp
@ -6,7 +6,7 @@
    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_FUSION_STD_ARRAY_ARRAY_ITERATOR_01062013_1700)
+#ifndef BOOST_FUSION_STD_ARRAY_ARRAY_ITERATOR_01062013_1700
 #define BOOST_FUSION_STD_ARRAY_ARRAY_ITERATOR_01062013_1700

 #include <cstddef>
@ -19,6 +19,11 @@
 #include <boost/fusion/iterator/iterator_facade.hpp>
 #include <boost/fusion/adapted/std_array/detail/array_size.hpp>

+#ifdef _MSC_VER
+#  pragma warning(push)
+#  pragma warning(disable: 4512) // assignment operator could not be generated.
+#endif
+
 namespace boost { namespace fusion
 {
    struct random_access_traversal_tag;
@ -99,11 +104,11 @@ namespace boost { namespace fusion
                return type();
            }
        };
-
-    private:
-
-        std_array_iterator<Array, Pos>& operator=(std_array_iterator<Array, Pos> const&);
    };
 }}

+#ifdef _MSC_VER
+#  pragma warning(pop)
+#endif
+
 #endif
--- a/include/boost/fusion/adapted/std_array/tag_of.hpp
+++ b/include/boost/fusion/adapted/std_array/tag_of.hpp
@ -5,7 +5,7 @@
    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_FUSION_STD_ARRAY_TAG_OF_01062013_1700)
+#ifndef BOOST_FUSION_STD_ARRAY_TAG_OF_01062013_1700
 #define BOOST_FUSION_STD_ARRAY_TAG_OF_01062013_1700

 #include <boost/fusion/support/tag_of_fwd.hpp>
--- a/include/boost/fusion/adapted/std_tuple.hpp
+++ b/include/boost/fusion/adapted/std_tuple.hpp
@ -4,7 +4,7 @@
    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_FUSION_BOOST_TUPLE_09242011_1744)
+#ifndef BOOST_FUSION_BOOST_TUPLE_09242011_1744
 #define BOOST_FUSION_BOOST_TUPLE_09242011_1744

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/std_tuple/detail/at_impl.hpp
+++ b/include/boost/fusion/adapted/std_tuple/detail/at_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_AT_IMPL_09242011_1744)
+#ifndef BOOST_FUSION_AT_IMPL_09242011_1744
 #define BOOST_FUSION_AT_IMPL_09242011_1744

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/std_tuple/detail/begin_impl.hpp
+++ b/include/boost/fusion/adapted/std_tuple/detail/begin_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_BEGIN_IMPL_09242011_1744)
+#ifndef BOOST_FUSION_BEGIN_IMPL_09242011_1744
 #define BOOST_FUSION_BEGIN_IMPL_09242011_1744

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/std_tuple/detail/build_std_tuple.hpp
+++ b/include/boost/fusion/adapted/std_tuple/detail/build_std_tuple.hpp
@ -4,7 +4,7 @@
    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_FUSION_BUILD_STD_TUPLE_05292014_0100)
+#ifndef BOOST_FUSION_BUILD_STD_TUPLE_05292014_0100
 #define BOOST_FUSION_BUILD_STD_TUPLE_05292014_0100

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/std_tuple/detail/category_of_impl.hpp
+++ b/include/boost/fusion/adapted/std_tuple/detail/category_of_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_CATEGORY_OF_IMPL_04202013_0940)
+#ifndef BOOST_FUSION_CATEGORY_OF_IMPL_04202013_0940
 #define BOOST_FUSION_CATEGORY_OF_IMPL_04202013_0940

 namespace boost { namespace fusion
--- a/include/boost/fusion/adapted/std_tuple/detail/convert_impl.hpp
+++ b/include/boost/fusion/adapted/std_tuple/detail/convert_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_CONVERT_IMPL_10172012_0940)
+#ifndef BOOST_FUSION_CONVERT_IMPL_10172012_0940
 #define BOOST_FUSION_CONVERT_IMPL_10172012_0940

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/std_tuple/detail/end_impl.hpp
+++ b/include/boost/fusion/adapted/std_tuple/detail/end_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_END_IMPL_09242011_1744)
+#ifndef BOOST_FUSION_END_IMPL_09242011_1744
 #define BOOST_FUSION_END_IMPL_09242011_1744

 #include <boost/fusion/support/config.hpp>
--- a/include/boost/fusion/adapted/std_tuple/detail/is_sequence_impl.hpp
+++ b/include/boost/fusion/adapted/std_tuple/detail/is_sequence_impl.hpp
@ -4,7 +4,7 @@
    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_FUSION_IS_SEQUENCE_IMPL_09242011_1744)
+#ifndef BOOST_FUSION_IS_SEQUENCE_IMPL_09242011_1744
 #define BOOST_FUSION_IS_SEQUENCE_IMPL_09242011_1744

 #include <boost/fusion/support/config.hpp>
--- a/Show More
+++ b/Show More